| 1 | /* pnggccrd.c - mixed C/assembler version of utilities to read a PNG file
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| 2 | *
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| 3 | * For Intel x86 CPU (Pentium-MMX or later) and GNU C compiler.
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| 4 | *
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| 5 | * See http://www.intel.com/drg/pentiumII/appnotes/916/916.htm
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| 6 | * and http://www.intel.com/drg/pentiumII/appnotes/923/923.htm
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| 7 | * for Intel's performance analysis of the MMX vs. non-MMX code.
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| 8 | *
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| 9 | * libpng version 1.2.5 - October 3, 2002
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| 10 | * For conditions of distribution and use, see copyright notice in png.h
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| 11 | * Copyright (c) 1998-2002 Glenn Randers-Pehrson
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| 12 | * Copyright (c) 1998, Intel Corporation
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| 13 | *
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| 14 | * Based on MSVC code contributed by Nirav Chhatrapati, Intel Corp., 1998.
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| 15 | * Interface to libpng contributed by Gilles Vollant, 1999.
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| 16 | * GNU C port by Greg Roelofs, 1999-2001.
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| 17 | *
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| 18 | * Lines 2350-4300 converted in place with intel2gas 1.3.1:
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| 19 | *
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| 20 | * intel2gas -mdI pnggccrd.c.partially-msvc -o pnggccrd.c
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| 21 | *
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| 22 | * and then cleaned up by hand. See http://hermes.terminal.at/intel2gas/ .
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| 23 | *
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| 24 | * NOTE: A sufficiently recent version of GNU as (or as.exe under DOS/Windows)
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| 25 | * is required to assemble the newer MMX instructions such as movq.
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| 26 | * For djgpp, see
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| 27 | *
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| 28 | * ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2gnu/bnu281b.zip
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| 29 | *
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| 30 | * (or a later version in the same directory). For Linux, check your
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| 31 | * distribution's web site(s) or try these links:
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| 32 | *
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| 33 | * http://rufus.w3.org/linux/RPM/binutils.html
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| 34 | * http://www.debian.org/Packages/stable/devel/binutils.html
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| 35 | * ftp://ftp.slackware.com/pub/linux/slackware/slackware/slakware/d1/
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| 36 | * binutils.tgz
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| 37 | *
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| 38 | * For other platforms, see the main GNU site:
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| 39 | *
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| 40 | * ftp://ftp.gnu.org/pub/gnu/binutils/
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| 41 | *
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| 42 | * Version 2.5.2l.15 is definitely too old...
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| 43 | */
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| 44 |
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| 45 | /*
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| 46 | * TEMPORARY PORTING NOTES AND CHANGELOG (mostly by Greg Roelofs)
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| 47 | * =====================================
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| 48 | *
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| 49 | * 19991006:
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| 50 | * - fixed sign error in post-MMX cleanup code (16- & 32-bit cases)
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| 51 | *
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| 52 | * 19991007:
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| 53 | * - additional optimizations (possible or definite):
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| 54 | * x [DONE] write MMX code for 64-bit case (pixel_bytes == 8) [not tested]
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| 55 | * - write MMX code for 48-bit case (pixel_bytes == 6)
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| 56 | * - figure out what's up with 24-bit case (pixel_bytes == 3):
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| 57 | * why subtract 8 from width_mmx in the pass 4/5 case?
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| 58 | * (only width_mmx case) (near line 1606)
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| 59 | * x [DONE] replace pixel_bytes within each block with the true
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| 60 | * constant value (or are compilers smart enough to do that?)
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| 61 | * - rewrite all MMX interlacing code so it's aligned with
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| 62 | * the *beginning* of the row buffer, not the end. This
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| 63 | * would not only allow one to eliminate half of the memory
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| 64 | * writes for odd passes (that is, pass == odd), it may also
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| 65 | * eliminate some unaligned-data-access exceptions (assuming
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| 66 | * there's a penalty for not aligning 64-bit accesses on
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| 67 | * 64-bit boundaries). The only catch is that the "leftover"
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| 68 | * pixel(s) at the end of the row would have to be saved,
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| 69 | * but there are enough unused MMX registers in every case,
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| 70 | * so this is not a problem. A further benefit is that the
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| 71 | * post-MMX cleanup code (C code) in at least some of the
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| 72 | * cases could be done within the assembler block.
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| 73 | * x [DONE] the "v3 v2 v1 v0 v7 v6 v5 v4" comments are confusing,
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| 74 | * inconsistent, and don't match the MMX Programmer's Reference
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| 75 | * Manual conventions anyway. They should be changed to
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| 76 | * "b7 b6 b5 b4 b3 b2 b1 b0," where b0 indicates the byte that
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| 77 | * was lowest in memory (e.g., corresponding to a left pixel)
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| 78 | * and b7 is the byte that was highest (e.g., a right pixel).
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| 79 | *
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| 80 | * 19991016:
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| 81 | * - Brennan's Guide notwithstanding, gcc under Linux does *not*
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| 82 | * want globals prefixed by underscores when referencing them--
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| 83 | * i.e., if the variable is const4, then refer to it as const4,
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| 84 | * not _const4. This seems to be a djgpp-specific requirement.
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| 85 | * Also, such variables apparently *must* be declared outside
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| 86 | * of functions; neither static nor automatic variables work if
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| 87 | * defined within the scope of a single function, but both
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| 88 | * static and truly global (multi-module) variables work fine.
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| 89 | *
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| 90 | * 19991023:
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| 91 | * - fixed png_combine_row() non-MMX replication bug (odd passes only?)
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| 92 | * - switched from string-concatenation-with-macros to cleaner method of
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| 93 | * renaming global variables for djgpp--i.e., always use prefixes in
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| 94 | * inlined assembler code (== strings) and conditionally rename the
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| 95 | * variables, not the other way around. Hence _const4, _mask8_0, etc.
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| 96 | *
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| 97 | * 19991024:
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| 98 | * - fixed mmxsupport()/png_do_read_interlace() first-row bug
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| 99 | * This one was severely weird: even though mmxsupport() doesn't touch
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| 100 | * ebx (where "row" pointer was stored), it nevertheless managed to zero
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| 101 | * the register (even in static/non-fPIC code--see below), which in turn
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| 102 | * caused png_do_read_interlace() to return prematurely on the first row of
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| 103 | * interlaced images (i.e., without expanding the interlaced pixels).
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| 104 | * Inspection of the generated assembly code didn't turn up any clues,
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| 105 | * although it did point at a minor optimization (i.e., get rid of
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| 106 | * mmx_supported_local variable and just use eax). Possibly the CPUID
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| 107 | * instruction is more destructive than it looks? (Not yet checked.)
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| 108 | * - "info gcc" was next to useless, so compared fPIC and non-fPIC assembly
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| 109 | * listings... Apparently register spillage has to do with ebx, since
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| 110 | * it's used to index the global offset table. Commenting it out of the
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| 111 | * input-reg lists in png_combine_row() eliminated compiler barfage, so
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| 112 | * ifdef'd with __PIC__ macro: if defined, use a global for unmask
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| 113 | *
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| 114 | * 19991107:
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| 115 | * - verified CPUID clobberage: 12-char string constant ("GenuineIntel",
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| 116 | * "AuthenticAMD", etc.) placed in ebx:ecx:edx. Still need to polish.
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| 117 | *
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| 118 | * 19991120:
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| 119 | * - made "diff" variable (now "_dif") global to simplify conversion of
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| 120 | * filtering routines (running out of regs, sigh). "diff" is still used
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| 121 | * in interlacing routines, however.
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| 122 | * - fixed up both versions of mmxsupport() (ORIG_THAT_USED_TO_CLOBBER_EBX
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| 123 | * macro determines which is used); original not yet tested.
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| 124 | *
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| 125 | * 20000213:
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| 126 | * - when compiling with gcc, be sure to use -fomit-frame-pointer
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| 127 | *
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| 128 | * 20000319:
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| 129 | * - fixed a register-name typo in png_do_read_interlace(), default (MMX) case,
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| 130 | * pass == 4 or 5, that caused visible corruption of interlaced images
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| 131 | *
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| 132 | * 20000623:
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| 133 | * - Various problems were reported with gcc 2.95.2 in the Cygwin environment,
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| 134 | * many of the form "forbidden register 0 (ax) was spilled for class AREG."
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| 135 | * This is explained at http://gcc.gnu.org/fom_serv/cache/23.html, and
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| 136 | * Chuck Wilson supplied a patch involving dummy output registers. See
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| 137 | * http://sourceforge.net/bugs/?func=detailbug&bug_id=108741&group_id=5624
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| 138 | * for the original (anonymous) SourceForge bug report.
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| 139 | *
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| 140 | * 20000706:
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| 141 | * - Chuck Wilson passed along these remaining gcc 2.95.2 errors:
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| 142 | * pnggccrd.c: In function `png_combine_row':
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| 143 | * pnggccrd.c:525: more than 10 operands in `asm'
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| 144 | * pnggccrd.c:669: more than 10 operands in `asm'
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| 145 | * pnggccrd.c:828: more than 10 operands in `asm'
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| 146 | * pnggccrd.c:994: more than 10 operands in `asm'
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| 147 | * pnggccrd.c:1177: more than 10 operands in `asm'
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| 148 | * They are all the same problem and can be worked around by using the
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| 149 | * global _unmask variable unconditionally, not just in the -fPIC case.
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| 150 | * Reportedly earlier versions of gcc also have the problem with more than
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| 151 | * 10 operands; they just don't report it. Much strangeness ensues, etc.
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| 152 | *
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| 153 | * 20000729:
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| 154 | * - enabled png_read_filter_row_mmx_up() (shortest remaining unconverted
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| 155 | * MMX routine); began converting png_read_filter_row_mmx_sub()
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| 156 | * - to finish remaining sections:
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| 157 | * - clean up indentation and comments
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| 158 | * - preload local variables
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| 159 | * - add output and input regs (order of former determines numerical
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| 160 | * mapping of latter)
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| 161 | * - avoid all usage of ebx (including bx, bh, bl) register [20000823]
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| 162 | * - remove "$" from addressing of Shift and Mask variables [20000823]
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| 163 | *
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| 164 | * 20000731:
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| 165 | * - global union vars causing segfaults in png_read_filter_row_mmx_sub()?
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| 166 | *
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| 167 | * 20000822:
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| 168 | * - ARGH, stupid png_read_filter_row_mmx_sub() segfault only happens with
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| 169 | * shared-library (-fPIC) version! Code works just fine as part of static
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| 170 | * library. Damn damn damn damn damn, should have tested that sooner.
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| 171 | * ebx is getting clobbered again (explicitly this time); need to save it
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| 172 | * on stack or rewrite asm code to avoid using it altogether. Blargh!
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| 173 | *
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| 174 | * 20000823:
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| 175 | * - first section was trickiest; all remaining sections have ebx -> edx now.
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| 176 | * (-fPIC works again.) Also added missing underscores to various Shift*
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| 177 | * and *Mask* globals and got rid of leading "$" signs.
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| 178 | *
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| 179 | * 20000826:
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| 180 | * - added visual separators to help navigate microscopic printed copies
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| 181 | * (http://pobox.com/~newt/code/gpr-latest.zip, mode 10); started working
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| 182 | * on png_read_filter_row_mmx_avg()
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| 183 | *
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| 184 | * 20000828:
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| 185 | * - finished png_read_filter_row_mmx_avg(): only Paeth left! (930 lines...)
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| 186 | * What the hell, did png_read_filter_row_mmx_paeth(), too. Comments not
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| 187 | * cleaned up/shortened in either routine, but functionality is complete
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| 188 | * and seems to be working fine.
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| 189 | *
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| 190 | * 20000829:
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| 191 | * - ahhh, figured out last(?) bit of gcc/gas asm-fu: if register is listed
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| 192 | * as an input reg (with dummy output variables, etc.), then it *cannot*
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| 193 | * also appear in the clobber list or gcc 2.95.2 will barf. The solution
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| 194 | * is simple enough...
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| 195 | *
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| 196 | * 20000914:
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| 197 | * - bug in png_read_filter_row_mmx_avg(): 16-bit grayscale not handled
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| 198 | * correctly (but 48-bit RGB just fine)
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| 199 | *
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| 200 | * 20000916:
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| 201 | * - fixed bug in png_read_filter_row_mmx_avg(), bpp == 2 case; three errors:
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| 202 | * - "_ShiftBpp.use = 24;" should have been "_ShiftBpp.use = 16;"
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| 203 | * - "_ShiftRem.use = 40;" should have been "_ShiftRem.use = 48;"
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| 204 | * - "psllq _ShiftRem, %%mm2" should have been "psrlq _ShiftRem, %%mm2"
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| 205 | *
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| 206 | * 20010101:
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| 207 | * - added new png_init_mmx_flags() function (here only because it needs to
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| 208 | * call mmxsupport(), which should probably become global png_mmxsupport());
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| 209 | * modified other MMX routines to run conditionally (png_ptr->asm_flags)
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| 210 | *
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| 211 | * 20010103:
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| 212 | * - renamed mmxsupport() to png_mmx_support(), with auto-set of mmx_supported,
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| 213 | * and made it public; moved png_init_mmx_flags() to png.c as internal func
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| 214 | *
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| 215 | * 20010104:
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| 216 | * - removed dependency on png_read_filter_row_c() (C code already duplicated
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| 217 | * within MMX version of png_read_filter_row()) so no longer necessary to
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| 218 | * compile it into pngrutil.o
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| 219 | *
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| 220 | * 20010310:
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| 221 | * - fixed buffer-overrun bug in png_combine_row() C code (non-MMX)
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| 222 | *
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| 223 | * 20020304:
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| 224 | * - eliminated incorrect use of width_mmx in pixel_bytes == 8 case
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| 225 | *
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| 226 | * STILL TO DO:
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| 227 | * - test png_do_read_interlace() 64-bit case (pixel_bytes == 8)
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| 228 | * - write MMX code for 48-bit case (pixel_bytes == 6)
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| 229 | * - figure out what's up with 24-bit case (pixel_bytes == 3):
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| 230 | * why subtract 8 from width_mmx in the pass 4/5 case?
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| 231 | * (only width_mmx case) (near line 1606)
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| 232 | * - rewrite all MMX interlacing code so it's aligned with beginning
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| 233 | * of the row buffer, not the end (see 19991007 for details)
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| 234 | * x pick one version of mmxsupport() and get rid of the other
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| 235 | * - add error messages to any remaining bogus default cases
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| 236 | * - enable pixel_depth == 8 cases in png_read_filter_row()? (test speed)
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| 237 | * x add support for runtime enable/disable/query of various MMX routines
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| 238 | */
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| 239 |
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| 240 | #define PNG_INTERNAL
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| 241 | #include "png.h"
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| 242 |
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| 243 | #if defined(PNG_USE_PNGGCCRD)
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| 244 |
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| 245 | int PNGAPI png_mmx_support(void);
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| 246 |
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| 247 | #ifdef PNG_USE_LOCAL_ARRAYS
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| 248 | static const int FARDATA png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
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| 249 | static const int FARDATA png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
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| 250 | static const int FARDATA png_pass_width[7] = {8, 4, 4, 2, 2, 1, 1};
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| 251 | #endif
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| 252 |
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| 253 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
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| 254 | /* djgpp, Win32, and Cygwin add their own underscores to global variables,
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| 255 | * so define them without: */
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| 256 | #if defined(__DJGPP__) || defined(WIN32) || defined(__CYGWIN__)
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| 257 | # define _mmx_supported mmx_supported
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| 258 | # define _const4 const4
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| 259 | # define _const6 const6
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| 260 | # define _mask8_0 mask8_0
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| 261 | # define _mask16_1 mask16_1
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| 262 | # define _mask16_0 mask16_0
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| 263 | # define _mask24_2 mask24_2
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| 264 | # define _mask24_1 mask24_1
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| 265 | # define _mask24_0 mask24_0
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| 266 | # define _mask32_3 mask32_3
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| 267 | # define _mask32_2 mask32_2
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| 268 | # define _mask32_1 mask32_1
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| 269 | # define _mask32_0 mask32_0
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| 270 | # define _mask48_5 mask48_5
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| 271 | # define _mask48_4 mask48_4
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| 272 | # define _mask48_3 mask48_3
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| 273 | # define _mask48_2 mask48_2
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| 274 | # define _mask48_1 mask48_1
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| 275 | # define _mask48_0 mask48_0
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| 276 | # define _LBCarryMask LBCarryMask
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| 277 | # define _HBClearMask HBClearMask
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| 278 | # define _ActiveMask ActiveMask
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| 279 | # define _ActiveMask2 ActiveMask2
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| 280 | # define _ActiveMaskEnd ActiveMaskEnd
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| 281 | # define _ShiftBpp ShiftBpp
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| 282 | # define _ShiftRem ShiftRem
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| 283 | #ifdef PNG_THREAD_UNSAFE_OK
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| 284 | # define _unmask unmask
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| 285 | # define _FullLength FullLength
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| 286 | # define _MMXLength MMXLength
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| 287 | # define _dif dif
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| 288 | # define _patemp patemp
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| 289 | # define _pbtemp pbtemp
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| 290 | # define _pctemp pctemp
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| 291 | #endif
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| 292 | #endif
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| 293 |
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| 294 |
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| 295 | /* These constants are used in the inlined MMX assembly code.
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| 296 | Ignore gcc's "At top level: defined but not used" warnings. */
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| 297 |
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| 298 | /* GRR 20000706: originally _unmask was needed only when compiling with -fPIC,
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| 299 | * since that case uses the %ebx register for indexing the Global Offset Table
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| 300 | * and there were no other registers available. But gcc 2.95 and later emit
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| 301 | * "more than 10 operands in `asm'" errors when %ebx is used to preload unmask
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| 302 | * in the non-PIC case, so we'll just use the global unconditionally now.
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| 303 | */
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| 304 | #ifdef PNG_THREAD_UNSAFE_OK
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| 305 | static int _unmask;
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| 306 | #endif
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| 307 |
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| 308 | static unsigned long long _mask8_0 = 0x0102040810204080LL;
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| 309 |
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| 310 | static unsigned long long _mask16_1 = 0x0101020204040808LL;
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| 311 | static unsigned long long _mask16_0 = 0x1010202040408080LL;
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| 312 |
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| 313 | static unsigned long long _mask24_2 = 0x0101010202020404LL;
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| 314 | static unsigned long long _mask24_1 = 0x0408080810101020LL;
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| 315 | static unsigned long long _mask24_0 = 0x2020404040808080LL;
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| 316 |
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| 317 | static unsigned long long _mask32_3 = 0x0101010102020202LL;
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| 318 | static unsigned long long _mask32_2 = 0x0404040408080808LL;
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| 319 | static unsigned long long _mask32_1 = 0x1010101020202020LL;
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| 320 | static unsigned long long _mask32_0 = 0x4040404080808080LL;
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| 321 |
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| 322 | static unsigned long long _mask48_5 = 0x0101010101010202LL;
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| 323 | static unsigned long long _mask48_4 = 0x0202020204040404LL;
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| 324 | static unsigned long long _mask48_3 = 0x0404080808080808LL;
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| 325 | static unsigned long long _mask48_2 = 0x1010101010102020LL;
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| 326 | static unsigned long long _mask48_1 = 0x2020202040404040LL;
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| 327 | static unsigned long long _mask48_0 = 0x4040808080808080LL;
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| 328 |
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| 329 | static unsigned long long _const4 = 0x0000000000FFFFFFLL;
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| 330 | //static unsigned long long _const5 = 0x000000FFFFFF0000LL; // NOT USED
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| 331 | static unsigned long long _const6 = 0x00000000000000FFLL;
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| 332 |
|
|---|
| 333 | // These are used in the row-filter routines and should/would be local
|
|---|
| 334 | // variables if not for gcc addressing limitations.
|
|---|
| 335 | // WARNING: Their presence probably defeats the thread safety of libpng.
|
|---|
| 336 |
|
|---|
| 337 | #ifdef PNG_THREAD_UNSAFE_OK
|
|---|
| 338 | static png_uint_32 _FullLength;
|
|---|
| 339 | static png_uint_32 _MMXLength;
|
|---|
| 340 | static int _dif;
|
|---|
| 341 | static int _patemp; // temp variables for Paeth routine
|
|---|
| 342 | static int _pbtemp;
|
|---|
| 343 | static int _pctemp;
|
|---|
| 344 | #endif
|
|---|
| 345 |
|
|---|
| 346 | void /* PRIVATE */
|
|---|
| 347 | png_squelch_warnings(void)
|
|---|
| 348 | {
|
|---|
| 349 | #ifdef PNG_THREAD_UNSAFE_OK
|
|---|
| 350 | _dif = _dif;
|
|---|
| 351 | _patemp = _patemp;
|
|---|
| 352 | _pbtemp = _pbtemp;
|
|---|
| 353 | _pctemp = _pctemp;
|
|---|
| 354 | _MMXLength = _MMXLength;
|
|---|
| 355 | #endif
|
|---|
| 356 | _const4 = _const4;
|
|---|
| 357 | _const6 = _const6;
|
|---|
| 358 | _mask8_0 = _mask8_0;
|
|---|
| 359 | _mask16_1 = _mask16_1;
|
|---|
| 360 | _mask16_0 = _mask16_0;
|
|---|
| 361 | _mask24_2 = _mask24_2;
|
|---|
| 362 | _mask24_1 = _mask24_1;
|
|---|
| 363 | _mask24_0 = _mask24_0;
|
|---|
| 364 | _mask32_3 = _mask32_3;
|
|---|
| 365 | _mask32_2 = _mask32_2;
|
|---|
| 366 | _mask32_1 = _mask32_1;
|
|---|
| 367 | _mask32_0 = _mask32_0;
|
|---|
| 368 | _mask48_5 = _mask48_5;
|
|---|
| 369 | _mask48_4 = _mask48_4;
|
|---|
| 370 | _mask48_3 = _mask48_3;
|
|---|
| 371 | _mask48_2 = _mask48_2;
|
|---|
| 372 | _mask48_1 = _mask48_1;
|
|---|
| 373 | _mask48_0 = _mask48_0;
|
|---|
| 374 | }
|
|---|
| 375 | #endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|---|
| 376 |
|
|---|
| 377 |
|
|---|
| 378 | static int _mmx_supported = 2;
|
|---|
| 379 |
|
|---|
| 380 | /*===========================================================================*/
|
|---|
| 381 | /* */
|
|---|
| 382 | /* P N G _ C O M B I N E _ R O W */
|
|---|
| 383 | /* */
|
|---|
| 384 | /*===========================================================================*/
|
|---|
| 385 |
|
|---|
| 386 | #if defined(PNG_HAVE_ASSEMBLER_COMBINE_ROW)
|
|---|
| 387 |
|
|---|
| 388 | #define BPP2 2
|
|---|
| 389 | #define BPP3 3 /* bytes per pixel (a.k.a. pixel_bytes) */
|
|---|
| 390 | #define BPP4 4
|
|---|
| 391 | #define BPP6 6 /* (defined only to help avoid cut-and-paste errors) */
|
|---|
| 392 | #define BPP8 8
|
|---|
| 393 |
|
|---|
| 394 | /* Combines the row recently read in with the previous row.
|
|---|
| 395 | This routine takes care of alpha and transparency if requested.
|
|---|
| 396 | This routine also handles the two methods of progressive display
|
|---|
| 397 | of interlaced images, depending on the mask value.
|
|---|
| 398 | The mask value describes which pixels are to be combined with
|
|---|
| 399 | the row. The pattern always repeats every 8 pixels, so just 8
|
|---|
| 400 | bits are needed. A one indicates the pixel is to be combined; a
|
|---|
| 401 | zero indicates the pixel is to be skipped. This is in addition
|
|---|
| 402 | to any alpha or transparency value associated with the pixel.
|
|---|
| 403 | If you want all pixels to be combined, pass 0xff (255) in mask. */
|
|---|
| 404 |
|
|---|
| 405 | /* Use this routine for the x86 platform - it uses a faster MMX routine
|
|---|
| 406 | if the machine supports MMX. */
|
|---|
| 407 |
|
|---|
| 408 | void /* PRIVATE */
|
|---|
| 409 | png_combine_row(png_structp png_ptr, png_bytep row, int mask)
|
|---|
| 410 | {
|
|---|
| 411 | png_debug(1, "in png_combine_row (pnggccrd.c)\n");
|
|---|
| 412 |
|
|---|
| 413 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
|
|---|
| 414 | if (_mmx_supported == 2) {
|
|---|
| 415 | /* this should have happened in png_init_mmx_flags() already */
|
|---|
| 416 | png_warning(png_ptr, "asm_flags may not have been initialized");
|
|---|
| 417 | png_mmx_support();
|
|---|
| 418 | }
|
|---|
| 419 | #endif
|
|---|
| 420 |
|
|---|
| 421 | if (mask == 0xff)
|
|---|
| 422 | {
|
|---|
| 423 | png_debug(2,"mask == 0xff: doing single png_memcpy()\n");
|
|---|
| 424 | png_memcpy(row, png_ptr->row_buf + 1,
|
|---|
| 425 | (png_size_t)((png_ptr->width * png_ptr->row_info.pixel_depth + 7) >> 3));
|
|---|
| 426 | }
|
|---|
| 427 | else /* (png_combine_row() is never called with mask == 0) */
|
|---|
| 428 | {
|
|---|
| 429 | switch (png_ptr->row_info.pixel_depth)
|
|---|
| 430 | {
|
|---|
| 431 | case 1: /* png_ptr->row_info.pixel_depth */
|
|---|
| 432 | {
|
|---|
| 433 | png_bytep sp;
|
|---|
| 434 | png_bytep dp;
|
|---|
| 435 | int s_inc, s_start, s_end;
|
|---|
| 436 | int m;
|
|---|
| 437 | int shift;
|
|---|
| 438 | png_uint_32 i;
|
|---|
| 439 |
|
|---|
| 440 | sp = png_ptr->row_buf + 1;
|
|---|
| 441 | dp = row;
|
|---|
| 442 | m = 0x80;
|
|---|
| 443 | #if defined(PNG_READ_PACKSWAP_SUPPORTED)
|
|---|
| 444 | if (png_ptr->transformations & PNG_PACKSWAP)
|
|---|
| 445 | {
|
|---|
| 446 | s_start = 0;
|
|---|
| 447 | s_end = 7;
|
|---|
| 448 | s_inc = 1;
|
|---|
| 449 | }
|
|---|
| 450 | else
|
|---|
| 451 | #endif
|
|---|
| 452 | {
|
|---|
| 453 | s_start = 7;
|
|---|
| 454 | s_end = 0;
|
|---|
| 455 | s_inc = -1;
|
|---|
| 456 | }
|
|---|
| 457 |
|
|---|
| 458 | shift = s_start;
|
|---|
| 459 |
|
|---|
| 460 | for (i = 0; i < png_ptr->width; i++)
|
|---|
| 461 | {
|
|---|
| 462 | if (m & mask)
|
|---|
| 463 | {
|
|---|
| 464 | int value;
|
|---|
| 465 |
|
|---|
| 466 | value = (*sp >> shift) & 0x1;
|
|---|
| 467 | *dp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff);
|
|---|
| 468 | *dp |= (png_byte)(value << shift);
|
|---|
| 469 | }
|
|---|
| 470 |
|
|---|
| 471 | if (shift == s_end)
|
|---|
| 472 | {
|
|---|
| 473 | shift = s_start;
|
|---|
| 474 | sp++;
|
|---|
| 475 | dp++;
|
|---|
| 476 | }
|
|---|
| 477 | else
|
|---|
| 478 | shift += s_inc;
|
|---|
| 479 |
|
|---|
| 480 | if (m == 1)
|
|---|
| 481 | m = 0x80;
|
|---|
| 482 | else
|
|---|
| 483 | m >>= 1;
|
|---|
| 484 | }
|
|---|
| 485 | break;
|
|---|
| 486 | }
|
|---|
| 487 |
|
|---|
| 488 | case 2: /* png_ptr->row_info.pixel_depth */
|
|---|
| 489 | {
|
|---|
| 490 | png_bytep sp;
|
|---|
| 491 | png_bytep dp;
|
|---|
| 492 | int s_start, s_end, s_inc;
|
|---|
| 493 | int m;
|
|---|
| 494 | int shift;
|
|---|
| 495 | png_uint_32 i;
|
|---|
| 496 | int value;
|
|---|
| 497 |
|
|---|
| 498 | sp = png_ptr->row_buf + 1;
|
|---|
| 499 | dp = row;
|
|---|
| 500 | m = 0x80;
|
|---|
| 501 | #if defined(PNG_READ_PACKSWAP_SUPPORTED)
|
|---|
| 502 | if (png_ptr->transformations & PNG_PACKSWAP)
|
|---|
| 503 | {
|
|---|
| 504 | s_start = 0;
|
|---|
| 505 | s_end = 6;
|
|---|
| 506 | s_inc = 2;
|
|---|
| 507 | }
|
|---|
| 508 | else
|
|---|
| 509 | #endif
|
|---|
| 510 | {
|
|---|
| 511 | s_start = 6;
|
|---|
| 512 | s_end = 0;
|
|---|
| 513 | s_inc = -2;
|
|---|
| 514 | }
|
|---|
| 515 |
|
|---|
| 516 | shift = s_start;
|
|---|
| 517 |
|
|---|
| 518 | for (i = 0; i < png_ptr->width; i++)
|
|---|
| 519 | {
|
|---|
| 520 | if (m & mask)
|
|---|
| 521 | {
|
|---|
| 522 | value = (*sp >> shift) & 0x3;
|
|---|
| 523 | *dp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
|
|---|
| 524 | *dp |= (png_byte)(value << shift);
|
|---|
| 525 | }
|
|---|
| 526 |
|
|---|
| 527 | if (shift == s_end)
|
|---|
| 528 | {
|
|---|
| 529 | shift = s_start;
|
|---|
| 530 | sp++;
|
|---|
| 531 | dp++;
|
|---|
| 532 | }
|
|---|
| 533 | else
|
|---|
| 534 | shift += s_inc;
|
|---|
| 535 | if (m == 1)
|
|---|
| 536 | m = 0x80;
|
|---|
| 537 | else
|
|---|
| 538 | m >>= 1;
|
|---|
| 539 | }
|
|---|
| 540 | break;
|
|---|
| 541 | }
|
|---|
| 542 |
|
|---|
| 543 | case 4: /* png_ptr->row_info.pixel_depth */
|
|---|
| 544 | {
|
|---|
| 545 | png_bytep sp;
|
|---|
| 546 | png_bytep dp;
|
|---|
| 547 | int s_start, s_end, s_inc;
|
|---|
| 548 | int m;
|
|---|
| 549 | int shift;
|
|---|
| 550 | png_uint_32 i;
|
|---|
| 551 | int value;
|
|---|
| 552 |
|
|---|
| 553 | sp = png_ptr->row_buf + 1;
|
|---|
| 554 | dp = row;
|
|---|
| 555 | m = 0x80;
|
|---|
| 556 | #if defined(PNG_READ_PACKSWAP_SUPPORTED)
|
|---|
| 557 | if (png_ptr->transformations & PNG_PACKSWAP)
|
|---|
| 558 | {
|
|---|
| 559 | s_start = 0;
|
|---|
| 560 | s_end = 4;
|
|---|
| 561 | s_inc = 4;
|
|---|
| 562 | }
|
|---|
| 563 | else
|
|---|
| 564 | #endif
|
|---|
| 565 | {
|
|---|
| 566 | s_start = 4;
|
|---|
| 567 | s_end = 0;
|
|---|
| 568 | s_inc = -4;
|
|---|
| 569 | }
|
|---|
| 570 | shift = s_start;
|
|---|
| 571 |
|
|---|
| 572 | for (i = 0; i < png_ptr->width; i++)
|
|---|
| 573 | {
|
|---|
| 574 | if (m & mask)
|
|---|
| 575 | {
|
|---|
| 576 | value = (*sp >> shift) & 0xf;
|
|---|
| 577 | *dp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
|
|---|
| 578 | *dp |= (png_byte)(value << shift);
|
|---|
| 579 | }
|
|---|
| 580 |
|
|---|
| 581 | if (shift == s_end)
|
|---|
| 582 | {
|
|---|
| 583 | shift = s_start;
|
|---|
| 584 | sp++;
|
|---|
| 585 | dp++;
|
|---|
| 586 | }
|
|---|
| 587 | else
|
|---|
| 588 | shift += s_inc;
|
|---|
| 589 | if (m == 1)
|
|---|
| 590 | m = 0x80;
|
|---|
| 591 | else
|
|---|
| 592 | m >>= 1;
|
|---|
| 593 | }
|
|---|
| 594 | break;
|
|---|
| 595 | }
|
|---|
| 596 |
|
|---|
| 597 | case 8: /* png_ptr->row_info.pixel_depth */
|
|---|
| 598 | {
|
|---|
| 599 | png_bytep srcptr;
|
|---|
| 600 | png_bytep dstptr;
|
|---|
| 601 |
|
|---|
| 602 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|---|
| 603 | #if !defined(PNG_1_0_X)
|
|---|
| 604 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
|
|---|
| 605 | /* && _mmx_supported */ )
|
|---|
| 606 | #else
|
|---|
| 607 | if (_mmx_supported)
|
|---|
| 608 | #endif
|
|---|
| 609 | {
|
|---|
| 610 | png_uint_32 len;
|
|---|
| 611 | int diff;
|
|---|
| 612 | int dummy_value_a; // fix 'forbidden register spilled' error
|
|---|
| 613 | int dummy_value_d;
|
|---|
| 614 | int dummy_value_c;
|
|---|
| 615 | int dummy_value_S;
|
|---|
| 616 | int dummy_value_D;
|
|---|
| 617 | _unmask = ~mask; // global variable for -fPIC version
|
|---|
| 618 | srcptr = png_ptr->row_buf + 1;
|
|---|
| 619 | dstptr = row;
|
|---|
| 620 | len = png_ptr->width &~7; // reduce to multiple of 8
|
|---|
| 621 | diff = (int) (png_ptr->width & 7); // amount lost
|
|---|
| 622 |
|
|---|
| 623 | __asm__ __volatile__ (
|
|---|
| 624 | "movd _unmask, %%mm7 \n\t" // load bit pattern
|
|---|
| 625 | "psubb %%mm6, %%mm6 \n\t" // zero mm6
|
|---|
| 626 | "punpcklbw %%mm7, %%mm7 \n\t"
|
|---|
| 627 | "punpcklwd %%mm7, %%mm7 \n\t"
|
|---|
| 628 | "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks
|
|---|
| 629 |
|
|---|
| 630 | "movq _mask8_0, %%mm0 \n\t"
|
|---|
| 631 | "pand %%mm7, %%mm0 \n\t" // nonzero if keep byte
|
|---|
| 632 | "pcmpeqb %%mm6, %%mm0 \n\t" // zeros->1s, v versa
|
|---|
| 633 |
|
|---|
| 634 | // preload "movl len, %%ecx \n\t" // load length of line
|
|---|
| 635 | // preload "movl srcptr, %%esi \n\t" // load source
|
|---|
| 636 | // preload "movl dstptr, %%edi \n\t" // load dest
|
|---|
| 637 |
|
|---|
| 638 | "cmpl $0, %%ecx \n\t" // len == 0 ?
|
|---|
| 639 | "je mainloop8end \n\t"
|
|---|
| 640 |
|
|---|
| 641 | "mainloop8: \n\t"
|
|---|
| 642 | "movq (%%esi), %%mm4 \n\t" // *srcptr
|
|---|
| 643 | "pand %%mm0, %%mm4 \n\t"
|
|---|
| 644 | "movq %%mm0, %%mm6 \n\t"
|
|---|
| 645 | "pandn (%%edi), %%mm6 \n\t" // *dstptr
|
|---|
| 646 | "por %%mm6, %%mm4 \n\t"
|
|---|
| 647 | "movq %%mm4, (%%edi) \n\t"
|
|---|
| 648 | "addl $8, %%esi \n\t" // inc by 8 bytes processed
|
|---|
| 649 | "addl $8, %%edi \n\t"
|
|---|
| 650 | "subl $8, %%ecx \n\t" // dec by 8 pixels processed
|
|---|
| 651 | "ja mainloop8 \n\t"
|
|---|
| 652 |
|
|---|
| 653 | "mainloop8end: \n\t"
|
|---|
| 654 | // preload "movl diff, %%ecx \n\t" // (diff is in eax)
|
|---|
| 655 | "movl %%eax, %%ecx \n\t"
|
|---|
| 656 | "cmpl $0, %%ecx \n\t"
|
|---|
| 657 | "jz end8 \n\t"
|
|---|
| 658 | // preload "movl mask, %%edx \n\t"
|
|---|
| 659 | "sall $24, %%edx \n\t" // make low byte, high byte
|
|---|
| 660 |
|
|---|
| 661 | "secondloop8: \n\t"
|
|---|
| 662 | "sall %%edx \n\t" // move high bit to CF
|
|---|
| 663 | "jnc skip8 \n\t" // if CF = 0
|
|---|
| 664 | "movb (%%esi), %%al \n\t"
|
|---|
| 665 | "movb %%al, (%%edi) \n\t"
|
|---|
| 666 |
|
|---|
| 667 | "skip8: \n\t"
|
|---|
| 668 | "incl %%esi \n\t"
|
|---|
| 669 | "incl %%edi \n\t"
|
|---|
| 670 | "decl %%ecx \n\t"
|
|---|
| 671 | "jnz secondloop8 \n\t"
|
|---|
| 672 |
|
|---|
| 673 | "end8: \n\t"
|
|---|
| 674 | "EMMS \n\t" // DONE
|
|---|
| 675 |
|
|---|
| 676 | : "=a" (dummy_value_a), // output regs (dummy)
|
|---|
| 677 | "=d" (dummy_value_d),
|
|---|
| 678 | "=c" (dummy_value_c),
|
|---|
| 679 | "=S" (dummy_value_S),
|
|---|
| 680 | "=D" (dummy_value_D)
|
|---|
| 681 |
|
|---|
| 682 | : "3" (srcptr), // esi // input regs
|
|---|
| 683 | "4" (dstptr), // edi
|
|---|
| 684 | "0" (diff), // eax
|
|---|
| 685 | // was (unmask) "b" RESERVED // ebx // Global Offset Table idx
|
|---|
| 686 | "2" (len), // ecx
|
|---|
| 687 | "1" (mask) // edx
|
|---|
| 688 |
|
|---|
| 689 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 690 | : "%mm0", "%mm4", "%mm6", "%mm7" // clobber list
|
|---|
| 691 | #endif
|
|---|
| 692 | );
|
|---|
| 693 | }
|
|---|
| 694 | else /* mmx _not supported - Use modified C routine */
|
|---|
| 695 | #endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|---|
| 696 | {
|
|---|
| 697 | register png_uint_32 i;
|
|---|
| 698 | png_uint_32 initial_val = png_pass_start[png_ptr->pass];
|
|---|
| 699 | /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
|
|---|
| 700 | register int stride = png_pass_inc[png_ptr->pass];
|
|---|
| 701 | /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
|
|---|
| 702 | register int rep_bytes = png_pass_width[png_ptr->pass];
|
|---|
| 703 | /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
|
|---|
| 704 | png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
|
|---|
| 705 | int diff = (int) (png_ptr->width & 7); /* amount lost */
|
|---|
| 706 | register png_uint_32 final_val = len; /* GRR bugfix */
|
|---|
| 707 |
|
|---|
| 708 | srcptr = png_ptr->row_buf + 1 + initial_val;
|
|---|
| 709 | dstptr = row + initial_val;
|
|---|
| 710 |
|
|---|
| 711 | for (i = initial_val; i < final_val; i += stride)
|
|---|
| 712 | {
|
|---|
| 713 | png_memcpy(dstptr, srcptr, rep_bytes);
|
|---|
| 714 | srcptr += stride;
|
|---|
| 715 | dstptr += stride;
|
|---|
| 716 | }
|
|---|
| 717 | if (diff) /* number of leftover pixels: 3 for pngtest */
|
|---|
| 718 | {
|
|---|
| 719 | final_val+=diff /* *BPP1 */ ;
|
|---|
| 720 | for (; i < final_val; i += stride)
|
|---|
| 721 | {
|
|---|
| 722 | if (rep_bytes > (int)(final_val-i))
|
|---|
| 723 | rep_bytes = (int)(final_val-i);
|
|---|
| 724 | png_memcpy(dstptr, srcptr, rep_bytes);
|
|---|
| 725 | srcptr += stride;
|
|---|
| 726 | dstptr += stride;
|
|---|
| 727 | }
|
|---|
| 728 | }
|
|---|
| 729 |
|
|---|
| 730 | } /* end of else (_mmx_supported) */
|
|---|
| 731 |
|
|---|
| 732 | break;
|
|---|
| 733 | } /* end 8 bpp */
|
|---|
| 734 |
|
|---|
| 735 | case 16: /* png_ptr->row_info.pixel_depth */
|
|---|
| 736 | {
|
|---|
| 737 | png_bytep srcptr;
|
|---|
| 738 | png_bytep dstptr;
|
|---|
| 739 |
|
|---|
| 740 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|---|
| 741 | #if !defined(PNG_1_0_X)
|
|---|
| 742 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
|
|---|
| 743 | /* && _mmx_supported */ )
|
|---|
| 744 | #else
|
|---|
| 745 | if (_mmx_supported)
|
|---|
| 746 | #endif
|
|---|
| 747 | {
|
|---|
| 748 | png_uint_32 len;
|
|---|
| 749 | int diff;
|
|---|
| 750 | int dummy_value_a; // fix 'forbidden register spilled' error
|
|---|
| 751 | int dummy_value_d;
|
|---|
| 752 | int dummy_value_c;
|
|---|
| 753 | int dummy_value_S;
|
|---|
| 754 | int dummy_value_D;
|
|---|
| 755 | _unmask = ~mask; // global variable for -fPIC version
|
|---|
| 756 | srcptr = png_ptr->row_buf + 1;
|
|---|
| 757 | dstptr = row;
|
|---|
| 758 | len = png_ptr->width &~7; // reduce to multiple of 8
|
|---|
| 759 | diff = (int) (png_ptr->width & 7); // amount lost //
|
|---|
| 760 |
|
|---|
| 761 | __asm__ __volatile__ (
|
|---|
| 762 | "movd _unmask, %%mm7 \n\t" // load bit pattern
|
|---|
| 763 | "psubb %%mm6, %%mm6 \n\t" // zero mm6
|
|---|
| 764 | "punpcklbw %%mm7, %%mm7 \n\t"
|
|---|
| 765 | "punpcklwd %%mm7, %%mm7 \n\t"
|
|---|
| 766 | "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks
|
|---|
| 767 |
|
|---|
| 768 | "movq _mask16_0, %%mm0 \n\t"
|
|---|
| 769 | "movq _mask16_1, %%mm1 \n\t"
|
|---|
| 770 |
|
|---|
| 771 | "pand %%mm7, %%mm0 \n\t"
|
|---|
| 772 | "pand %%mm7, %%mm1 \n\t"
|
|---|
| 773 |
|
|---|
| 774 | "pcmpeqb %%mm6, %%mm0 \n\t"
|
|---|
| 775 | "pcmpeqb %%mm6, %%mm1 \n\t"
|
|---|
| 776 |
|
|---|
| 777 | // preload "movl len, %%ecx \n\t" // load length of line
|
|---|
| 778 | // preload "movl srcptr, %%esi \n\t" // load source
|
|---|
| 779 | // preload "movl dstptr, %%edi \n\t" // load dest
|
|---|
| 780 |
|
|---|
| 781 | "cmpl $0, %%ecx \n\t"
|
|---|
| 782 | "jz mainloop16end \n\t"
|
|---|
| 783 |
|
|---|
| 784 | "mainloop16: \n\t"
|
|---|
| 785 | "movq (%%esi), %%mm4 \n\t"
|
|---|
| 786 | "pand %%mm0, %%mm4 \n\t"
|
|---|
| 787 | "movq %%mm0, %%mm6 \n\t"
|
|---|
| 788 | "movq (%%edi), %%mm7 \n\t"
|
|---|
| 789 | "pandn %%mm7, %%mm6 \n\t"
|
|---|
| 790 | "por %%mm6, %%mm4 \n\t"
|
|---|
| 791 | "movq %%mm4, (%%edi) \n\t"
|
|---|
| 792 |
|
|---|
| 793 | "movq 8(%%esi), %%mm5 \n\t"
|
|---|
| 794 | "pand %%mm1, %%mm5 \n\t"
|
|---|
| 795 | "movq %%mm1, %%mm7 \n\t"
|
|---|
| 796 | "movq 8(%%edi), %%mm6 \n\t"
|
|---|
| 797 | "pandn %%mm6, %%mm7 \n\t"
|
|---|
| 798 | "por %%mm7, %%mm5 \n\t"
|
|---|
| 799 | "movq %%mm5, 8(%%edi) \n\t"
|
|---|
| 800 |
|
|---|
| 801 | "addl $16, %%esi \n\t" // inc by 16 bytes processed
|
|---|
| 802 | "addl $16, %%edi \n\t"
|
|---|
| 803 | "subl $8, %%ecx \n\t" // dec by 8 pixels processed
|
|---|
| 804 | "ja mainloop16 \n\t"
|
|---|
| 805 |
|
|---|
| 806 | "mainloop16end: \n\t"
|
|---|
| 807 | // preload "movl diff, %%ecx \n\t" // (diff is in eax)
|
|---|
| 808 | "movl %%eax, %%ecx \n\t"
|
|---|
| 809 | "cmpl $0, %%ecx \n\t"
|
|---|
| 810 | "jz end16 \n\t"
|
|---|
| 811 | // preload "movl mask, %%edx \n\t"
|
|---|
| 812 | "sall $24, %%edx \n\t" // make low byte, high byte
|
|---|
| 813 |
|
|---|
| 814 | "secondloop16: \n\t"
|
|---|
| 815 | "sall %%edx \n\t" // move high bit to CF
|
|---|
| 816 | "jnc skip16 \n\t" // if CF = 0
|
|---|
| 817 | "movw (%%esi), %%ax \n\t"
|
|---|
| 818 | "movw %%ax, (%%edi) \n\t"
|
|---|
| 819 |
|
|---|
| 820 | "skip16: \n\t"
|
|---|
| 821 | "addl $2, %%esi \n\t"
|
|---|
| 822 | "addl $2, %%edi \n\t"
|
|---|
| 823 | "decl %%ecx \n\t"
|
|---|
| 824 | "jnz secondloop16 \n\t"
|
|---|
| 825 |
|
|---|
| 826 | "end16: \n\t"
|
|---|
| 827 | "EMMS \n\t" // DONE
|
|---|
| 828 |
|
|---|
| 829 | : "=a" (dummy_value_a), // output regs (dummy)
|
|---|
| 830 | "=c" (dummy_value_c),
|
|---|
| 831 | "=d" (dummy_value_d),
|
|---|
| 832 | "=S" (dummy_value_S),
|
|---|
| 833 | "=D" (dummy_value_D)
|
|---|
| 834 |
|
|---|
| 835 | : "0" (diff), // eax // input regs
|
|---|
| 836 | // was (unmask) " " RESERVED // ebx // Global Offset Table idx
|
|---|
| 837 | "1" (len), // ecx
|
|---|
| 838 | "2" (mask), // edx
|
|---|
| 839 | "3" (srcptr), // esi
|
|---|
| 840 | "4" (dstptr) // edi
|
|---|
| 841 |
|
|---|
| 842 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 843 | : "%mm0", "%mm1", "%mm4" // clobber list
|
|---|
| 844 | , "%mm5", "%mm6", "%mm7"
|
|---|
| 845 | #endif
|
|---|
| 846 | );
|
|---|
| 847 | }
|
|---|
| 848 | else /* mmx _not supported - Use modified C routine */
|
|---|
| 849 | #endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|---|
| 850 | {
|
|---|
| 851 | register png_uint_32 i;
|
|---|
| 852 | png_uint_32 initial_val = BPP2 * png_pass_start[png_ptr->pass];
|
|---|
| 853 | /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
|
|---|
| 854 | register int stride = BPP2 * png_pass_inc[png_ptr->pass];
|
|---|
| 855 | /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
|
|---|
| 856 | register int rep_bytes = BPP2 * png_pass_width[png_ptr->pass];
|
|---|
| 857 | /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
|
|---|
| 858 | png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
|
|---|
| 859 | int diff = (int) (png_ptr->width & 7); /* amount lost */
|
|---|
| 860 | register png_uint_32 final_val = BPP2 * len; /* GRR bugfix */
|
|---|
| 861 |
|
|---|
| 862 | srcptr = png_ptr->row_buf + 1 + initial_val;
|
|---|
| 863 | dstptr = row + initial_val;
|
|---|
| 864 |
|
|---|
| 865 | for (i = initial_val; i < final_val; i += stride)
|
|---|
| 866 | {
|
|---|
| 867 | png_memcpy(dstptr, srcptr, rep_bytes);
|
|---|
| 868 | srcptr += stride;
|
|---|
| 869 | dstptr += stride;
|
|---|
| 870 | }
|
|---|
| 871 | if (diff) /* number of leftover pixels: 3 for pngtest */
|
|---|
| 872 | {
|
|---|
| 873 | final_val+=diff*BPP2;
|
|---|
| 874 | for (; i < final_val; i += stride)
|
|---|
| 875 | {
|
|---|
| 876 | if (rep_bytes > (int)(final_val-i))
|
|---|
| 877 | rep_bytes = (int)(final_val-i);
|
|---|
| 878 | png_memcpy(dstptr, srcptr, rep_bytes);
|
|---|
| 879 | srcptr += stride;
|
|---|
| 880 | dstptr += stride;
|
|---|
| 881 | }
|
|---|
| 882 | }
|
|---|
| 883 | } /* end of else (_mmx_supported) */
|
|---|
| 884 |
|
|---|
| 885 | break;
|
|---|
| 886 | } /* end 16 bpp */
|
|---|
| 887 |
|
|---|
| 888 | case 24: /* png_ptr->row_info.pixel_depth */
|
|---|
| 889 | {
|
|---|
| 890 | png_bytep srcptr;
|
|---|
| 891 | png_bytep dstptr;
|
|---|
| 892 |
|
|---|
| 893 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|---|
| 894 | #if !defined(PNG_1_0_X)
|
|---|
| 895 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
|
|---|
| 896 | /* && _mmx_supported */ )
|
|---|
| 897 | #else
|
|---|
| 898 | if (_mmx_supported)
|
|---|
| 899 | #endif
|
|---|
| 900 | {
|
|---|
| 901 | png_uint_32 len;
|
|---|
| 902 | int diff;
|
|---|
| 903 | int dummy_value_a; // fix 'forbidden register spilled' error
|
|---|
| 904 | int dummy_value_d;
|
|---|
| 905 | int dummy_value_c;
|
|---|
| 906 | int dummy_value_S;
|
|---|
| 907 | int dummy_value_D;
|
|---|
| 908 | _unmask = ~mask; // global variable for -fPIC version
|
|---|
| 909 | srcptr = png_ptr->row_buf + 1;
|
|---|
| 910 | dstptr = row;
|
|---|
| 911 | len = png_ptr->width &~7; // reduce to multiple of 8
|
|---|
| 912 | diff = (int) (png_ptr->width & 7); // amount lost //
|
|---|
| 913 |
|
|---|
| 914 | __asm__ __volatile__ (
|
|---|
| 915 | "movd _unmask, %%mm7 \n\t" // load bit pattern
|
|---|
| 916 | "psubb %%mm6, %%mm6 \n\t" // zero mm6
|
|---|
| 917 | "punpcklbw %%mm7, %%mm7 \n\t"
|
|---|
| 918 | "punpcklwd %%mm7, %%mm7 \n\t"
|
|---|
| 919 | "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks
|
|---|
| 920 |
|
|---|
| 921 | "movq _mask24_0, %%mm0 \n\t"
|
|---|
| 922 | "movq _mask24_1, %%mm1 \n\t"
|
|---|
| 923 | "movq _mask24_2, %%mm2 \n\t"
|
|---|
| 924 |
|
|---|
| 925 | "pand %%mm7, %%mm0 \n\t"
|
|---|
| 926 | "pand %%mm7, %%mm1 \n\t"
|
|---|
| 927 | "pand %%mm7, %%mm2 \n\t"
|
|---|
| 928 |
|
|---|
| 929 | "pcmpeqb %%mm6, %%mm0 \n\t"
|
|---|
| 930 | "pcmpeqb %%mm6, %%mm1 \n\t"
|
|---|
| 931 | "pcmpeqb %%mm6, %%mm2 \n\t"
|
|---|
| 932 |
|
|---|
| 933 | // preload "movl len, %%ecx \n\t" // load length of line
|
|---|
| 934 | // preload "movl srcptr, %%esi \n\t" // load source
|
|---|
| 935 | // preload "movl dstptr, %%edi \n\t" // load dest
|
|---|
| 936 |
|
|---|
| 937 | "cmpl $0, %%ecx \n\t"
|
|---|
| 938 | "jz mainloop24end \n\t"
|
|---|
| 939 |
|
|---|
| 940 | "mainloop24: \n\t"
|
|---|
| 941 | "movq (%%esi), %%mm4 \n\t"
|
|---|
| 942 | "pand %%mm0, %%mm4 \n\t"
|
|---|
| 943 | "movq %%mm0, %%mm6 \n\t"
|
|---|
| 944 | "movq (%%edi), %%mm7 \n\t"
|
|---|
| 945 | "pandn %%mm7, %%mm6 \n\t"
|
|---|
| 946 | "por %%mm6, %%mm4 \n\t"
|
|---|
| 947 | "movq %%mm4, (%%edi) \n\t"
|
|---|
| 948 |
|
|---|
| 949 | "movq 8(%%esi), %%mm5 \n\t"
|
|---|
| 950 | "pand %%mm1, %%mm5 \n\t"
|
|---|
| 951 | "movq %%mm1, %%mm7 \n\t"
|
|---|
| 952 | "movq 8(%%edi), %%mm6 \n\t"
|
|---|
| 953 | "pandn %%mm6, %%mm7 \n\t"
|
|---|
| 954 | "por %%mm7, %%mm5 \n\t"
|
|---|
| 955 | "movq %%mm5, 8(%%edi) \n\t"
|
|---|
| 956 |
|
|---|
| 957 | "movq 16(%%esi), %%mm6 \n\t"
|
|---|
| 958 | "pand %%mm2, %%mm6 \n\t"
|
|---|
| 959 | "movq %%mm2, %%mm4 \n\t"
|
|---|
| 960 | "movq 16(%%edi), %%mm7 \n\t"
|
|---|
| 961 | "pandn %%mm7, %%mm4 \n\t"
|
|---|
| 962 | "por %%mm4, %%mm6 \n\t"
|
|---|
| 963 | "movq %%mm6, 16(%%edi) \n\t"
|
|---|
| 964 |
|
|---|
| 965 | "addl $24, %%esi \n\t" // inc by 24 bytes processed
|
|---|
| 966 | "addl $24, %%edi \n\t"
|
|---|
| 967 | "subl $8, %%ecx \n\t" // dec by 8 pixels processed
|
|---|
| 968 |
|
|---|
| 969 | "ja mainloop24 \n\t"
|
|---|
| 970 |
|
|---|
| 971 | "mainloop24end: \n\t"
|
|---|
| 972 | // preload "movl diff, %%ecx \n\t" // (diff is in eax)
|
|---|
| 973 | "movl %%eax, %%ecx \n\t"
|
|---|
| 974 | "cmpl $0, %%ecx \n\t"
|
|---|
| 975 | "jz end24 \n\t"
|
|---|
| 976 | // preload "movl mask, %%edx \n\t"
|
|---|
| 977 | "sall $24, %%edx \n\t" // make low byte, high byte
|
|---|
| 978 |
|
|---|
| 979 | "secondloop24: \n\t"
|
|---|
| 980 | "sall %%edx \n\t" // move high bit to CF
|
|---|
| 981 | "jnc skip24 \n\t" // if CF = 0
|
|---|
| 982 | "movw (%%esi), %%ax \n\t"
|
|---|
| 983 | "movw %%ax, (%%edi) \n\t"
|
|---|
| 984 | "xorl %%eax, %%eax \n\t"
|
|---|
| 985 | "movb 2(%%esi), %%al \n\t"
|
|---|
| 986 | "movb %%al, 2(%%edi) \n\t"
|
|---|
| 987 |
|
|---|
| 988 | "skip24: \n\t"
|
|---|
| 989 | "addl $3, %%esi \n\t"
|
|---|
| 990 | "addl $3, %%edi \n\t"
|
|---|
| 991 | "decl %%ecx \n\t"
|
|---|
| 992 | "jnz secondloop24 \n\t"
|
|---|
| 993 |
|
|---|
| 994 | "end24: \n\t"
|
|---|
| 995 | "EMMS \n\t" // DONE
|
|---|
| 996 |
|
|---|
| 997 | : "=a" (dummy_value_a), // output regs (dummy)
|
|---|
| 998 | "=d" (dummy_value_d),
|
|---|
| 999 | "=c" (dummy_value_c),
|
|---|
| 1000 | "=S" (dummy_value_S),
|
|---|
| 1001 | "=D" (dummy_value_D)
|
|---|
| 1002 |
|
|---|
| 1003 | : "3" (srcptr), // esi // input regs
|
|---|
| 1004 | "4" (dstptr), // edi
|
|---|
| 1005 | "0" (diff), // eax
|
|---|
| 1006 | // was (unmask) "b" RESERVED // ebx // Global Offset Table idx
|
|---|
| 1007 | "2" (len), // ecx
|
|---|
| 1008 | "1" (mask) // edx
|
|---|
| 1009 |
|
|---|
| 1010 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 1011 | : "%mm0", "%mm1", "%mm2" // clobber list
|
|---|
| 1012 | , "%mm4", "%mm5", "%mm6", "%mm7"
|
|---|
| 1013 | #endif
|
|---|
| 1014 | );
|
|---|
| 1015 | }
|
|---|
| 1016 | else /* mmx _not supported - Use modified C routine */
|
|---|
| 1017 | #endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|---|
| 1018 | {
|
|---|
| 1019 | register png_uint_32 i;
|
|---|
| 1020 | png_uint_32 initial_val = BPP3 * png_pass_start[png_ptr->pass];
|
|---|
| 1021 | /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
|
|---|
| 1022 | register int stride = BPP3 * png_pass_inc[png_ptr->pass];
|
|---|
| 1023 | /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
|
|---|
| 1024 | register int rep_bytes = BPP3 * png_pass_width[png_ptr->pass];
|
|---|
| 1025 | /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
|
|---|
| 1026 | png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
|
|---|
| 1027 | int diff = (int) (png_ptr->width & 7); /* amount lost */
|
|---|
| 1028 | register png_uint_32 final_val = BPP3 * len; /* GRR bugfix */
|
|---|
| 1029 |
|
|---|
| 1030 | srcptr = png_ptr->row_buf + 1 + initial_val;
|
|---|
| 1031 | dstptr = row + initial_val;
|
|---|
| 1032 |
|
|---|
| 1033 | for (i = initial_val; i < final_val; i += stride)
|
|---|
| 1034 | {
|
|---|
| 1035 | png_memcpy(dstptr, srcptr, rep_bytes);
|
|---|
| 1036 | srcptr += stride;
|
|---|
| 1037 | dstptr += stride;
|
|---|
| 1038 | }
|
|---|
| 1039 | if (diff) /* number of leftover pixels: 3 for pngtest */
|
|---|
| 1040 | {
|
|---|
| 1041 | final_val+=diff*BPP3;
|
|---|
| 1042 | for (; i < final_val; i += stride)
|
|---|
| 1043 | {
|
|---|
| 1044 | if (rep_bytes > (int)(final_val-i))
|
|---|
| 1045 | rep_bytes = (int)(final_val-i);
|
|---|
| 1046 | png_memcpy(dstptr, srcptr, rep_bytes);
|
|---|
| 1047 | srcptr += stride;
|
|---|
| 1048 | dstptr += stride;
|
|---|
| 1049 | }
|
|---|
| 1050 | }
|
|---|
| 1051 | } /* end of else (_mmx_supported) */
|
|---|
| 1052 |
|
|---|
| 1053 | break;
|
|---|
| 1054 | } /* end 24 bpp */
|
|---|
| 1055 |
|
|---|
| 1056 | case 32: /* png_ptr->row_info.pixel_depth */
|
|---|
| 1057 | {
|
|---|
| 1058 | png_bytep srcptr;
|
|---|
| 1059 | png_bytep dstptr;
|
|---|
| 1060 |
|
|---|
| 1061 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|---|
| 1062 | #if !defined(PNG_1_0_X)
|
|---|
| 1063 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
|
|---|
| 1064 | /* && _mmx_supported */ )
|
|---|
| 1065 | #else
|
|---|
| 1066 | if (_mmx_supported)
|
|---|
| 1067 | #endif
|
|---|
| 1068 | {
|
|---|
| 1069 | png_uint_32 len;
|
|---|
| 1070 | int diff;
|
|---|
| 1071 | int dummy_value_a; // fix 'forbidden register spilled' error
|
|---|
| 1072 | int dummy_value_d;
|
|---|
| 1073 | int dummy_value_c;
|
|---|
| 1074 | int dummy_value_S;
|
|---|
| 1075 | int dummy_value_D;
|
|---|
| 1076 | _unmask = ~mask; // global variable for -fPIC version
|
|---|
| 1077 | srcptr = png_ptr->row_buf + 1;
|
|---|
| 1078 | dstptr = row;
|
|---|
| 1079 | len = png_ptr->width &~7; // reduce to multiple of 8
|
|---|
| 1080 | diff = (int) (png_ptr->width & 7); // amount lost //
|
|---|
| 1081 |
|
|---|
| 1082 | __asm__ __volatile__ (
|
|---|
| 1083 | "movd _unmask, %%mm7 \n\t" // load bit pattern
|
|---|
| 1084 | "psubb %%mm6, %%mm6 \n\t" // zero mm6
|
|---|
| 1085 | "punpcklbw %%mm7, %%mm7 \n\t"
|
|---|
| 1086 | "punpcklwd %%mm7, %%mm7 \n\t"
|
|---|
| 1087 | "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks
|
|---|
| 1088 |
|
|---|
| 1089 | "movq _mask32_0, %%mm0 \n\t"
|
|---|
| 1090 | "movq _mask32_1, %%mm1 \n\t"
|
|---|
| 1091 | "movq _mask32_2, %%mm2 \n\t"
|
|---|
| 1092 | "movq _mask32_3, %%mm3 \n\t"
|
|---|
| 1093 |
|
|---|
| 1094 | "pand %%mm7, %%mm0 \n\t"
|
|---|
| 1095 | "pand %%mm7, %%mm1 \n\t"
|
|---|
| 1096 | "pand %%mm7, %%mm2 \n\t"
|
|---|
| 1097 | "pand %%mm7, %%mm3 \n\t"
|
|---|
| 1098 |
|
|---|
| 1099 | "pcmpeqb %%mm6, %%mm0 \n\t"
|
|---|
| 1100 | "pcmpeqb %%mm6, %%mm1 \n\t"
|
|---|
| 1101 | "pcmpeqb %%mm6, %%mm2 \n\t"
|
|---|
| 1102 | "pcmpeqb %%mm6, %%mm3 \n\t"
|
|---|
| 1103 |
|
|---|
| 1104 | // preload "movl len, %%ecx \n\t" // load length of line
|
|---|
| 1105 | // preload "movl srcptr, %%esi \n\t" // load source
|
|---|
| 1106 | // preload "movl dstptr, %%edi \n\t" // load dest
|
|---|
| 1107 |
|
|---|
| 1108 | "cmpl $0, %%ecx \n\t" // lcr
|
|---|
| 1109 | "jz mainloop32end \n\t"
|
|---|
| 1110 |
|
|---|
| 1111 | "mainloop32: \n\t"
|
|---|
| 1112 | "movq (%%esi), %%mm4 \n\t"
|
|---|
| 1113 | "pand %%mm0, %%mm4 \n\t"
|
|---|
| 1114 | "movq %%mm0, %%mm6 \n\t"
|
|---|
| 1115 | "movq (%%edi), %%mm7 \n\t"
|
|---|
| 1116 | "pandn %%mm7, %%mm6 \n\t"
|
|---|
| 1117 | "por %%mm6, %%mm4 \n\t"
|
|---|
| 1118 | "movq %%mm4, (%%edi) \n\t"
|
|---|
| 1119 |
|
|---|
| 1120 | "movq 8(%%esi), %%mm5 \n\t"
|
|---|
| 1121 | "pand %%mm1, %%mm5 \n\t"
|
|---|
| 1122 | "movq %%mm1, %%mm7 \n\t"
|
|---|
| 1123 | "movq 8(%%edi), %%mm6 \n\t"
|
|---|
| 1124 | "pandn %%mm6, %%mm7 \n\t"
|
|---|
| 1125 | "por %%mm7, %%mm5 \n\t"
|
|---|
| 1126 | "movq %%mm5, 8(%%edi) \n\t"
|
|---|
| 1127 |
|
|---|
| 1128 | "movq 16(%%esi), %%mm6 \n\t"
|
|---|
| 1129 | "pand %%mm2, %%mm6 \n\t"
|
|---|
| 1130 | "movq %%mm2, %%mm4 \n\t"
|
|---|
| 1131 | "movq 16(%%edi), %%mm7 \n\t"
|
|---|
| 1132 | "pandn %%mm7, %%mm4 \n\t"
|
|---|
| 1133 | "por %%mm4, %%mm6 \n\t"
|
|---|
| 1134 | "movq %%mm6, 16(%%edi) \n\t"
|
|---|
| 1135 |
|
|---|
| 1136 | "movq 24(%%esi), %%mm7 \n\t"
|
|---|
| 1137 | "pand %%mm3, %%mm7 \n\t"
|
|---|
| 1138 | "movq %%mm3, %%mm5 \n\t"
|
|---|
| 1139 | "movq 24(%%edi), %%mm4 \n\t"
|
|---|
| 1140 | "pandn %%mm4, %%mm5 \n\t"
|
|---|
| 1141 | "por %%mm5, %%mm7 \n\t"
|
|---|
| 1142 | "movq %%mm7, 24(%%edi) \n\t"
|
|---|
| 1143 |
|
|---|
| 1144 | "addl $32, %%esi \n\t" // inc by 32 bytes processed
|
|---|
| 1145 | "addl $32, %%edi \n\t"
|
|---|
| 1146 | "subl $8, %%ecx \n\t" // dec by 8 pixels processed
|
|---|
| 1147 | "ja mainloop32 \n\t"
|
|---|
| 1148 |
|
|---|
| 1149 | "mainloop32end: \n\t"
|
|---|
| 1150 | // preload "movl diff, %%ecx \n\t" // (diff is in eax)
|
|---|
| 1151 | "movl %%eax, %%ecx \n\t"
|
|---|
| 1152 | "cmpl $0, %%ecx \n\t"
|
|---|
| 1153 | "jz end32 \n\t"
|
|---|
| 1154 | // preload "movl mask, %%edx \n\t"
|
|---|
| 1155 | "sall $24, %%edx \n\t" // low byte => high byte
|
|---|
| 1156 |
|
|---|
| 1157 | "secondloop32: \n\t"
|
|---|
| 1158 | "sall %%edx \n\t" // move high bit to CF
|
|---|
| 1159 | "jnc skip32 \n\t" // if CF = 0
|
|---|
| 1160 | "movl (%%esi), %%eax \n\t"
|
|---|
| 1161 | "movl %%eax, (%%edi) \n\t"
|
|---|
| 1162 |
|
|---|
| 1163 | "skip32: \n\t"
|
|---|
| 1164 | "addl $4, %%esi \n\t"
|
|---|
| 1165 | "addl $4, %%edi \n\t"
|
|---|
| 1166 | "decl %%ecx \n\t"
|
|---|
| 1167 | "jnz secondloop32 \n\t"
|
|---|
| 1168 |
|
|---|
| 1169 | "end32: \n\t"
|
|---|
| 1170 | "EMMS \n\t" // DONE
|
|---|
| 1171 |
|
|---|
| 1172 | : "=a" (dummy_value_a), // output regs (dummy)
|
|---|
| 1173 | "=d" (dummy_value_d),
|
|---|
| 1174 | "=c" (dummy_value_c),
|
|---|
| 1175 | "=S" (dummy_value_S),
|
|---|
| 1176 | "=D" (dummy_value_D)
|
|---|
| 1177 |
|
|---|
| 1178 | : "3" (srcptr), // esi // input regs
|
|---|
| 1179 | "4" (dstptr), // edi
|
|---|
| 1180 | "0" (diff), // eax
|
|---|
| 1181 | // was (unmask) "b" RESERVED // ebx // Global Offset Table idx
|
|---|
| 1182 | "2" (len), // ecx
|
|---|
| 1183 | "1" (mask) // edx
|
|---|
| 1184 |
|
|---|
| 1185 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 1186 | : "%mm0", "%mm1", "%mm2", "%mm3" // clobber list
|
|---|
| 1187 | , "%mm4", "%mm5", "%mm6", "%mm7"
|
|---|
| 1188 | #endif
|
|---|
| 1189 | );
|
|---|
| 1190 | }
|
|---|
| 1191 | else /* mmx _not supported - Use modified C routine */
|
|---|
| 1192 | #endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|---|
| 1193 | {
|
|---|
| 1194 | register png_uint_32 i;
|
|---|
| 1195 | png_uint_32 initial_val = BPP4 * png_pass_start[png_ptr->pass];
|
|---|
| 1196 | /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
|
|---|
| 1197 | register int stride = BPP4 * png_pass_inc[png_ptr->pass];
|
|---|
| 1198 | /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
|
|---|
| 1199 | register int rep_bytes = BPP4 * png_pass_width[png_ptr->pass];
|
|---|
| 1200 | /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
|
|---|
| 1201 | png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
|
|---|
| 1202 | int diff = (int) (png_ptr->width & 7); /* amount lost */
|
|---|
| 1203 | register png_uint_32 final_val = BPP4 * len; /* GRR bugfix */
|
|---|
| 1204 |
|
|---|
| 1205 | srcptr = png_ptr->row_buf + 1 + initial_val;
|
|---|
| 1206 | dstptr = row + initial_val;
|
|---|
| 1207 |
|
|---|
| 1208 | for (i = initial_val; i < final_val; i += stride)
|
|---|
| 1209 | {
|
|---|
| 1210 | png_memcpy(dstptr, srcptr, rep_bytes);
|
|---|
| 1211 | srcptr += stride;
|
|---|
| 1212 | dstptr += stride;
|
|---|
| 1213 | }
|
|---|
| 1214 | if (diff) /* number of leftover pixels: 3 for pngtest */
|
|---|
| 1215 | {
|
|---|
| 1216 | final_val+=diff*BPP4;
|
|---|
| 1217 | for (; i < final_val; i += stride)
|
|---|
| 1218 | {
|
|---|
| 1219 | if (rep_bytes > (int)(final_val-i))
|
|---|
| 1220 | rep_bytes = (int)(final_val-i);
|
|---|
| 1221 | png_memcpy(dstptr, srcptr, rep_bytes);
|
|---|
| 1222 | srcptr += stride;
|
|---|
| 1223 | dstptr += stride;
|
|---|
| 1224 | }
|
|---|
| 1225 | }
|
|---|
| 1226 | } /* end of else (_mmx_supported) */
|
|---|
| 1227 |
|
|---|
| 1228 | break;
|
|---|
| 1229 | } /* end 32 bpp */
|
|---|
| 1230 |
|
|---|
| 1231 | case 48: /* png_ptr->row_info.pixel_depth */
|
|---|
| 1232 | {
|
|---|
| 1233 | png_bytep srcptr;
|
|---|
| 1234 | png_bytep dstptr;
|
|---|
| 1235 |
|
|---|
| 1236 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|---|
| 1237 | #if !defined(PNG_1_0_X)
|
|---|
| 1238 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
|
|---|
| 1239 | /* && _mmx_supported */ )
|
|---|
| 1240 | #else
|
|---|
| 1241 | if (_mmx_supported)
|
|---|
| 1242 | #endif
|
|---|
| 1243 | {
|
|---|
| 1244 | png_uint_32 len;
|
|---|
| 1245 | int diff;
|
|---|
| 1246 | int dummy_value_a; // fix 'forbidden register spilled' error
|
|---|
| 1247 | int dummy_value_d;
|
|---|
| 1248 | int dummy_value_c;
|
|---|
| 1249 | int dummy_value_S;
|
|---|
| 1250 | int dummy_value_D;
|
|---|
| 1251 | _unmask = ~mask; // global variable for -fPIC version
|
|---|
| 1252 | srcptr = png_ptr->row_buf + 1;
|
|---|
| 1253 | dstptr = row;
|
|---|
| 1254 | len = png_ptr->width &~7; // reduce to multiple of 8
|
|---|
| 1255 | diff = (int) (png_ptr->width & 7); // amount lost //
|
|---|
| 1256 |
|
|---|
| 1257 | __asm__ __volatile__ (
|
|---|
| 1258 | "movd _unmask, %%mm7 \n\t" // load bit pattern
|
|---|
| 1259 | "psubb %%mm6, %%mm6 \n\t" // zero mm6
|
|---|
| 1260 | "punpcklbw %%mm7, %%mm7 \n\t"
|
|---|
| 1261 | "punpcklwd %%mm7, %%mm7 \n\t"
|
|---|
| 1262 | "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks
|
|---|
| 1263 |
|
|---|
| 1264 | "movq _mask48_0, %%mm0 \n\t"
|
|---|
| 1265 | "movq _mask48_1, %%mm1 \n\t"
|
|---|
| 1266 | "movq _mask48_2, %%mm2 \n\t"
|
|---|
| 1267 | "movq _mask48_3, %%mm3 \n\t"
|
|---|
| 1268 | "movq _mask48_4, %%mm4 \n\t"
|
|---|
| 1269 | "movq _mask48_5, %%mm5 \n\t"
|
|---|
| 1270 |
|
|---|
| 1271 | "pand %%mm7, %%mm0 \n\t"
|
|---|
| 1272 | "pand %%mm7, %%mm1 \n\t"
|
|---|
| 1273 | "pand %%mm7, %%mm2 \n\t"
|
|---|
| 1274 | "pand %%mm7, %%mm3 \n\t"
|
|---|
| 1275 | "pand %%mm7, %%mm4 \n\t"
|
|---|
| 1276 | "pand %%mm7, %%mm5 \n\t"
|
|---|
| 1277 |
|
|---|
| 1278 | "pcmpeqb %%mm6, %%mm0 \n\t"
|
|---|
| 1279 | "pcmpeqb %%mm6, %%mm1 \n\t"
|
|---|
| 1280 | "pcmpeqb %%mm6, %%mm2 \n\t"
|
|---|
| 1281 | "pcmpeqb %%mm6, %%mm3 \n\t"
|
|---|
| 1282 | "pcmpeqb %%mm6, %%mm4 \n\t"
|
|---|
| 1283 | "pcmpeqb %%mm6, %%mm5 \n\t"
|
|---|
| 1284 |
|
|---|
| 1285 | // preload "movl len, %%ecx \n\t" // load length of line
|
|---|
| 1286 | // preload "movl srcptr, %%esi \n\t" // load source
|
|---|
| 1287 | // preload "movl dstptr, %%edi \n\t" // load dest
|
|---|
| 1288 |
|
|---|
| 1289 | "cmpl $0, %%ecx \n\t"
|
|---|
| 1290 | "jz mainloop48end \n\t"
|
|---|
| 1291 |
|
|---|
| 1292 | "mainloop48: \n\t"
|
|---|
| 1293 | "movq (%%esi), %%mm7 \n\t"
|
|---|
| 1294 | "pand %%mm0, %%mm7 \n\t"
|
|---|
| 1295 | "movq %%mm0, %%mm6 \n\t"
|
|---|
| 1296 | "pandn (%%edi), %%mm6 \n\t"
|
|---|
| 1297 | "por %%mm6, %%mm7 \n\t"
|
|---|
| 1298 | "movq %%mm7, (%%edi) \n\t"
|
|---|
| 1299 |
|
|---|
| 1300 | "movq 8(%%esi), %%mm6 \n\t"
|
|---|
| 1301 | "pand %%mm1, %%mm6 \n\t"
|
|---|
| 1302 | "movq %%mm1, %%mm7 \n\t"
|
|---|
| 1303 | "pandn 8(%%edi), %%mm7 \n\t"
|
|---|
| 1304 | "por %%mm7, %%mm6 \n\t"
|
|---|
| 1305 | "movq %%mm6, 8(%%edi) \n\t"
|
|---|
| 1306 |
|
|---|
| 1307 | "movq 16(%%esi), %%mm6 \n\t"
|
|---|
| 1308 | "pand %%mm2, %%mm6 \n\t"
|
|---|
| 1309 | "movq %%mm2, %%mm7 \n\t"
|
|---|
| 1310 | "pandn 16(%%edi), %%mm7 \n\t"
|
|---|
| 1311 | "por %%mm7, %%mm6 \n\t"
|
|---|
| 1312 | "movq %%mm6, 16(%%edi) \n\t"
|
|---|
| 1313 |
|
|---|
| 1314 | "movq 24(%%esi), %%mm7 \n\t"
|
|---|
| 1315 | "pand %%mm3, %%mm7 \n\t"
|
|---|
| 1316 | "movq %%mm3, %%mm6 \n\t"
|
|---|
| 1317 | "pandn 24(%%edi), %%mm6 \n\t"
|
|---|
| 1318 | "por %%mm6, %%mm7 \n\t"
|
|---|
| 1319 | "movq %%mm7, 24(%%edi) \n\t"
|
|---|
| 1320 |
|
|---|
| 1321 | "movq 32(%%esi), %%mm6 \n\t"
|
|---|
| 1322 | "pand %%mm4, %%mm6 \n\t"
|
|---|
| 1323 | "movq %%mm4, %%mm7 \n\t"
|
|---|
| 1324 | "pandn 32(%%edi), %%mm7 \n\t"
|
|---|
| 1325 | "por %%mm7, %%mm6 \n\t"
|
|---|
| 1326 | "movq %%mm6, 32(%%edi) \n\t"
|
|---|
| 1327 |
|
|---|
| 1328 | "movq 40(%%esi), %%mm7 \n\t"
|
|---|
| 1329 | "pand %%mm5, %%mm7 \n\t"
|
|---|
| 1330 | "movq %%mm5, %%mm6 \n\t"
|
|---|
| 1331 | "pandn 40(%%edi), %%mm6 \n\t"
|
|---|
| 1332 | "por %%mm6, %%mm7 \n\t"
|
|---|
| 1333 | "movq %%mm7, 40(%%edi) \n\t"
|
|---|
| 1334 |
|
|---|
| 1335 | "addl $48, %%esi \n\t" // inc by 48 bytes processed
|
|---|
| 1336 | "addl $48, %%edi \n\t"
|
|---|
| 1337 | "subl $8, %%ecx \n\t" // dec by 8 pixels processed
|
|---|
| 1338 |
|
|---|
| 1339 | "ja mainloop48 \n\t"
|
|---|
| 1340 |
|
|---|
| 1341 | "mainloop48end: \n\t"
|
|---|
| 1342 | // preload "movl diff, %%ecx \n\t" // (diff is in eax)
|
|---|
| 1343 | "movl %%eax, %%ecx \n\t"
|
|---|
| 1344 | "cmpl $0, %%ecx \n\t"
|
|---|
| 1345 | "jz end48 \n\t"
|
|---|
| 1346 | // preload "movl mask, %%edx \n\t"
|
|---|
| 1347 | "sall $24, %%edx \n\t" // make low byte, high byte
|
|---|
| 1348 |
|
|---|
| 1349 | "secondloop48: \n\t"
|
|---|
| 1350 | "sall %%edx \n\t" // move high bit to CF
|
|---|
| 1351 | "jnc skip48 \n\t" // if CF = 0
|
|---|
| 1352 | "movl (%%esi), %%eax \n\t"
|
|---|
| 1353 | "movl %%eax, (%%edi) \n\t"
|
|---|
| 1354 |
|
|---|
| 1355 | "skip48: \n\t"
|
|---|
| 1356 | "addl $4, %%esi \n\t"
|
|---|
| 1357 | "addl $4, %%edi \n\t"
|
|---|
| 1358 | "decl %%ecx \n\t"
|
|---|
| 1359 | "jnz secondloop48 \n\t"
|
|---|
| 1360 |
|
|---|
| 1361 | "end48: \n\t"
|
|---|
| 1362 | "EMMS \n\t" // DONE
|
|---|
| 1363 |
|
|---|
| 1364 | : "=a" (dummy_value_a), // output regs (dummy)
|
|---|
| 1365 | "=d" (dummy_value_d),
|
|---|
| 1366 | "=c" (dummy_value_c),
|
|---|
| 1367 | "=S" (dummy_value_S),
|
|---|
| 1368 | "=D" (dummy_value_D)
|
|---|
| 1369 |
|
|---|
| 1370 | : "3" (srcptr), // esi // input regs
|
|---|
| 1371 | "4" (dstptr), // edi
|
|---|
| 1372 | "0" (diff), // eax
|
|---|
| 1373 | // was (unmask) "b" RESERVED // ebx // Global Offset Table idx
|
|---|
| 1374 | "2" (len), // ecx
|
|---|
| 1375 | "1" (mask) // edx
|
|---|
| 1376 |
|
|---|
| 1377 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 1378 | : "%mm0", "%mm1", "%mm2", "%mm3" // clobber list
|
|---|
| 1379 | , "%mm4", "%mm5", "%mm6", "%mm7"
|
|---|
| 1380 | #endif
|
|---|
| 1381 | );
|
|---|
| 1382 | }
|
|---|
| 1383 | else /* mmx _not supported - Use modified C routine */
|
|---|
| 1384 | #endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|---|
| 1385 | {
|
|---|
| 1386 | register png_uint_32 i;
|
|---|
| 1387 | png_uint_32 initial_val = BPP6 * png_pass_start[png_ptr->pass];
|
|---|
| 1388 | /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
|
|---|
| 1389 | register int stride = BPP6 * png_pass_inc[png_ptr->pass];
|
|---|
| 1390 | /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
|
|---|
| 1391 | register int rep_bytes = BPP6 * png_pass_width[png_ptr->pass];
|
|---|
| 1392 | /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
|
|---|
| 1393 | png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
|
|---|
| 1394 | int diff = (int) (png_ptr->width & 7); /* amount lost */
|
|---|
| 1395 | register png_uint_32 final_val = BPP6 * len; /* GRR bugfix */
|
|---|
| 1396 |
|
|---|
| 1397 | srcptr = png_ptr->row_buf + 1 + initial_val;
|
|---|
| 1398 | dstptr = row + initial_val;
|
|---|
| 1399 |
|
|---|
| 1400 | for (i = initial_val; i < final_val; i += stride)
|
|---|
| 1401 | {
|
|---|
| 1402 | png_memcpy(dstptr, srcptr, rep_bytes);
|
|---|
| 1403 | srcptr += stride;
|
|---|
| 1404 | dstptr += stride;
|
|---|
| 1405 | }
|
|---|
| 1406 | if (diff) /* number of leftover pixels: 3 for pngtest */
|
|---|
| 1407 | {
|
|---|
| 1408 | final_val+=diff*BPP6;
|
|---|
| 1409 | for (; i < final_val; i += stride)
|
|---|
| 1410 | {
|
|---|
| 1411 | if (rep_bytes > (int)(final_val-i))
|
|---|
| 1412 | rep_bytes = (int)(final_val-i);
|
|---|
| 1413 | png_memcpy(dstptr, srcptr, rep_bytes);
|
|---|
| 1414 | srcptr += stride;
|
|---|
| 1415 | dstptr += stride;
|
|---|
| 1416 | }
|
|---|
| 1417 | }
|
|---|
| 1418 | } /* end of else (_mmx_supported) */
|
|---|
| 1419 |
|
|---|
| 1420 | break;
|
|---|
| 1421 | } /* end 48 bpp */
|
|---|
| 1422 |
|
|---|
| 1423 | case 64: /* png_ptr->row_info.pixel_depth */
|
|---|
| 1424 | {
|
|---|
| 1425 | png_bytep srcptr;
|
|---|
| 1426 | png_bytep dstptr;
|
|---|
| 1427 | register png_uint_32 i;
|
|---|
| 1428 | png_uint_32 initial_val = BPP8 * png_pass_start[png_ptr->pass];
|
|---|
| 1429 | /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
|
|---|
| 1430 | register int stride = BPP8 * png_pass_inc[png_ptr->pass];
|
|---|
| 1431 | /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
|
|---|
| 1432 | register int rep_bytes = BPP8 * png_pass_width[png_ptr->pass];
|
|---|
| 1433 | /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
|
|---|
| 1434 | png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
|
|---|
| 1435 | int diff = (int) (png_ptr->width & 7); /* amount lost */
|
|---|
| 1436 | register png_uint_32 final_val = BPP8 * len; /* GRR bugfix */
|
|---|
| 1437 |
|
|---|
| 1438 | srcptr = png_ptr->row_buf + 1 + initial_val;
|
|---|
| 1439 | dstptr = row + initial_val;
|
|---|
| 1440 |
|
|---|
| 1441 | for (i = initial_val; i < final_val; i += stride)
|
|---|
| 1442 | {
|
|---|
| 1443 | png_memcpy(dstptr, srcptr, rep_bytes);
|
|---|
| 1444 | srcptr += stride;
|
|---|
| 1445 | dstptr += stride;
|
|---|
| 1446 | }
|
|---|
| 1447 | if (diff) /* number of leftover pixels: 3 for pngtest */
|
|---|
| 1448 | {
|
|---|
| 1449 | final_val+=diff*BPP8;
|
|---|
| 1450 | for (; i < final_val; i += stride)
|
|---|
| 1451 | {
|
|---|
| 1452 | if (rep_bytes > (int)(final_val-i))
|
|---|
| 1453 | rep_bytes = (int)(final_val-i);
|
|---|
| 1454 | png_memcpy(dstptr, srcptr, rep_bytes);
|
|---|
| 1455 | srcptr += stride;
|
|---|
| 1456 | dstptr += stride;
|
|---|
| 1457 | }
|
|---|
| 1458 | }
|
|---|
| 1459 |
|
|---|
| 1460 | break;
|
|---|
| 1461 | } /* end 64 bpp */
|
|---|
| 1462 |
|
|---|
| 1463 | default: /* png_ptr->row_info.pixel_depth != 1,2,4,8,16,24,32,48,64 */
|
|---|
| 1464 | {
|
|---|
| 1465 | /* this should never happen */
|
|---|
| 1466 | png_warning(png_ptr, "Invalid row_info.pixel_depth in pnggccrd");
|
|---|
| 1467 | break;
|
|---|
| 1468 | }
|
|---|
| 1469 | } /* end switch (png_ptr->row_info.pixel_depth) */
|
|---|
| 1470 |
|
|---|
| 1471 | } /* end if (non-trivial mask) */
|
|---|
| 1472 |
|
|---|
| 1473 | } /* end png_combine_row() */
|
|---|
| 1474 |
|
|---|
| 1475 | #endif /* PNG_HAVE_ASSEMBLER_COMBINE_ROW */
|
|---|
| 1476 |
|
|---|
| 1477 |
|
|---|
| 1478 |
|
|---|
| 1479 |
|
|---|
| 1480 | /*===========================================================================*/
|
|---|
| 1481 | /* */
|
|---|
| 1482 | /* P N G _ D O _ R E A D _ I N T E R L A C E */
|
|---|
| 1483 | /* */
|
|---|
| 1484 | /*===========================================================================*/
|
|---|
| 1485 |
|
|---|
| 1486 | #if defined(PNG_READ_INTERLACING_SUPPORTED)
|
|---|
| 1487 | #if defined(PNG_HAVE_ASSEMBLER_READ_INTERLACE)
|
|---|
| 1488 |
|
|---|
| 1489 | /* png_do_read_interlace() is called after any 16-bit to 8-bit conversion
|
|---|
| 1490 | * has taken place. [GRR: what other steps come before and/or after?]
|
|---|
| 1491 | */
|
|---|
| 1492 |
|
|---|
| 1493 | void /* PRIVATE */
|
|---|
| 1494 | png_do_read_interlace(png_structp png_ptr)
|
|---|
| 1495 | {
|
|---|
| 1496 | png_row_infop row_info = &(png_ptr->row_info);
|
|---|
| 1497 | png_bytep row = png_ptr->row_buf + 1;
|
|---|
| 1498 | int pass = png_ptr->pass;
|
|---|
| 1499 | #if defined(PNG_READ_PACKSWAP_SUPPORTED)
|
|---|
| 1500 | png_uint_32 transformations = png_ptr->transformations;
|
|---|
| 1501 | #endif
|
|---|
| 1502 |
|
|---|
| 1503 | png_debug(1, "in png_do_read_interlace (pnggccrd.c)\n");
|
|---|
| 1504 |
|
|---|
| 1505 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
|
|---|
| 1506 | if (_mmx_supported == 2) {
|
|---|
| 1507 | #if !defined(PNG_1_0_X)
|
|---|
| 1508 | /* this should have happened in png_init_mmx_flags() already */
|
|---|
| 1509 | png_warning(png_ptr, "asm_flags may not have been initialized");
|
|---|
| 1510 | #endif
|
|---|
| 1511 | png_mmx_support();
|
|---|
| 1512 | }
|
|---|
| 1513 | #endif
|
|---|
| 1514 |
|
|---|
| 1515 | if (row != NULL && row_info != NULL)
|
|---|
| 1516 | {
|
|---|
| 1517 | png_uint_32 final_width;
|
|---|
| 1518 |
|
|---|
| 1519 | final_width = row_info->width * png_pass_inc[pass];
|
|---|
| 1520 |
|
|---|
| 1521 | switch (row_info->pixel_depth)
|
|---|
| 1522 | {
|
|---|
| 1523 | case 1:
|
|---|
| 1524 | {
|
|---|
| 1525 | png_bytep sp, dp;
|
|---|
| 1526 | int sshift, dshift;
|
|---|
| 1527 | int s_start, s_end, s_inc;
|
|---|
| 1528 | png_byte v;
|
|---|
| 1529 | png_uint_32 i;
|
|---|
| 1530 | int j;
|
|---|
| 1531 |
|
|---|
| 1532 | sp = row + (png_size_t)((row_info->width - 1) >> 3);
|
|---|
| 1533 | dp = row + (png_size_t)((final_width - 1) >> 3);
|
|---|
| 1534 | #if defined(PNG_READ_PACKSWAP_SUPPORTED)
|
|---|
| 1535 | if (transformations & PNG_PACKSWAP)
|
|---|
| 1536 | {
|
|---|
| 1537 | sshift = (int)((row_info->width + 7) & 7);
|
|---|
| 1538 | dshift = (int)((final_width + 7) & 7);
|
|---|
| 1539 | s_start = 7;
|
|---|
| 1540 | s_end = 0;
|
|---|
| 1541 | s_inc = -1;
|
|---|
| 1542 | }
|
|---|
| 1543 | else
|
|---|
| 1544 | #endif
|
|---|
| 1545 | {
|
|---|
| 1546 | sshift = 7 - (int)((row_info->width + 7) & 7);
|
|---|
| 1547 | dshift = 7 - (int)((final_width + 7) & 7);
|
|---|
| 1548 | s_start = 0;
|
|---|
| 1549 | s_end = 7;
|
|---|
| 1550 | s_inc = 1;
|
|---|
| 1551 | }
|
|---|
| 1552 |
|
|---|
| 1553 | for (i = row_info->width; i; i--)
|
|---|
| 1554 | {
|
|---|
| 1555 | v = (png_byte)((*sp >> sshift) & 0x1);
|
|---|
| 1556 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 1557 | {
|
|---|
| 1558 | *dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff);
|
|---|
| 1559 | *dp |= (png_byte)(v << dshift);
|
|---|
| 1560 | if (dshift == s_end)
|
|---|
| 1561 | {
|
|---|
| 1562 | dshift = s_start;
|
|---|
| 1563 | dp--;
|
|---|
| 1564 | }
|
|---|
| 1565 | else
|
|---|
| 1566 | dshift += s_inc;
|
|---|
| 1567 | }
|
|---|
| 1568 | if (sshift == s_end)
|
|---|
| 1569 | {
|
|---|
| 1570 | sshift = s_start;
|
|---|
| 1571 | sp--;
|
|---|
| 1572 | }
|
|---|
| 1573 | else
|
|---|
| 1574 | sshift += s_inc;
|
|---|
| 1575 | }
|
|---|
| 1576 | break;
|
|---|
| 1577 | }
|
|---|
| 1578 |
|
|---|
| 1579 | case 2:
|
|---|
| 1580 | {
|
|---|
| 1581 | png_bytep sp, dp;
|
|---|
| 1582 | int sshift, dshift;
|
|---|
| 1583 | int s_start, s_end, s_inc;
|
|---|
| 1584 | png_uint_32 i;
|
|---|
| 1585 |
|
|---|
| 1586 | sp = row + (png_size_t)((row_info->width - 1) >> 2);
|
|---|
| 1587 | dp = row + (png_size_t)((final_width - 1) >> 2);
|
|---|
| 1588 | #if defined(PNG_READ_PACKSWAP_SUPPORTED)
|
|---|
| 1589 | if (transformations & PNG_PACKSWAP)
|
|---|
| 1590 | {
|
|---|
| 1591 | sshift = (png_size_t)(((row_info->width + 3) & 3) << 1);
|
|---|
| 1592 | dshift = (png_size_t)(((final_width + 3) & 3) << 1);
|
|---|
| 1593 | s_start = 6;
|
|---|
| 1594 | s_end = 0;
|
|---|
| 1595 | s_inc = -2;
|
|---|
| 1596 | }
|
|---|
| 1597 | else
|
|---|
| 1598 | #endif
|
|---|
| 1599 | {
|
|---|
| 1600 | sshift = (png_size_t)((3 - ((row_info->width + 3) & 3)) << 1);
|
|---|
| 1601 | dshift = (png_size_t)((3 - ((final_width + 3) & 3)) << 1);
|
|---|
| 1602 | s_start = 0;
|
|---|
| 1603 | s_end = 6;
|
|---|
| 1604 | s_inc = 2;
|
|---|
| 1605 | }
|
|---|
| 1606 |
|
|---|
| 1607 | for (i = row_info->width; i; i--)
|
|---|
| 1608 | {
|
|---|
| 1609 | png_byte v;
|
|---|
| 1610 | int j;
|
|---|
| 1611 |
|
|---|
| 1612 | v = (png_byte)((*sp >> sshift) & 0x3);
|
|---|
| 1613 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 1614 | {
|
|---|
| 1615 | *dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff);
|
|---|
| 1616 | *dp |= (png_byte)(v << dshift);
|
|---|
| 1617 | if (dshift == s_end)
|
|---|
| 1618 | {
|
|---|
| 1619 | dshift = s_start;
|
|---|
| 1620 | dp--;
|
|---|
| 1621 | }
|
|---|
| 1622 | else
|
|---|
| 1623 | dshift += s_inc;
|
|---|
| 1624 | }
|
|---|
| 1625 | if (sshift == s_end)
|
|---|
| 1626 | {
|
|---|
| 1627 | sshift = s_start;
|
|---|
| 1628 | sp--;
|
|---|
| 1629 | }
|
|---|
| 1630 | else
|
|---|
| 1631 | sshift += s_inc;
|
|---|
| 1632 | }
|
|---|
| 1633 | break;
|
|---|
| 1634 | }
|
|---|
| 1635 |
|
|---|
| 1636 | case 4:
|
|---|
| 1637 | {
|
|---|
| 1638 | png_bytep sp, dp;
|
|---|
| 1639 | int sshift, dshift;
|
|---|
| 1640 | int s_start, s_end, s_inc;
|
|---|
| 1641 | png_uint_32 i;
|
|---|
| 1642 |
|
|---|
| 1643 | sp = row + (png_size_t)((row_info->width - 1) >> 1);
|
|---|
| 1644 | dp = row + (png_size_t)((final_width - 1) >> 1);
|
|---|
| 1645 | #if defined(PNG_READ_PACKSWAP_SUPPORTED)
|
|---|
| 1646 | if (transformations & PNG_PACKSWAP)
|
|---|
| 1647 | {
|
|---|
| 1648 | sshift = (png_size_t)(((row_info->width + 1) & 1) << 2);
|
|---|
| 1649 | dshift = (png_size_t)(((final_width + 1) & 1) << 2);
|
|---|
| 1650 | s_start = 4;
|
|---|
| 1651 | s_end = 0;
|
|---|
| 1652 | s_inc = -4;
|
|---|
| 1653 | }
|
|---|
| 1654 | else
|
|---|
| 1655 | #endif
|
|---|
| 1656 | {
|
|---|
| 1657 | sshift = (png_size_t)((1 - ((row_info->width + 1) & 1)) << 2);
|
|---|
| 1658 | dshift = (png_size_t)((1 - ((final_width + 1) & 1)) << 2);
|
|---|
| 1659 | s_start = 0;
|
|---|
| 1660 | s_end = 4;
|
|---|
| 1661 | s_inc = 4;
|
|---|
| 1662 | }
|
|---|
| 1663 |
|
|---|
| 1664 | for (i = row_info->width; i; i--)
|
|---|
| 1665 | {
|
|---|
| 1666 | png_byte v;
|
|---|
| 1667 | int j;
|
|---|
| 1668 |
|
|---|
| 1669 | v = (png_byte)((*sp >> sshift) & 0xf);
|
|---|
| 1670 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 1671 | {
|
|---|
| 1672 | *dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff);
|
|---|
| 1673 | *dp |= (png_byte)(v << dshift);
|
|---|
| 1674 | if (dshift == s_end)
|
|---|
| 1675 | {
|
|---|
| 1676 | dshift = s_start;
|
|---|
| 1677 | dp--;
|
|---|
| 1678 | }
|
|---|
| 1679 | else
|
|---|
| 1680 | dshift += s_inc;
|
|---|
| 1681 | }
|
|---|
| 1682 | if (sshift == s_end)
|
|---|
| 1683 | {
|
|---|
| 1684 | sshift = s_start;
|
|---|
| 1685 | sp--;
|
|---|
| 1686 | }
|
|---|
| 1687 | else
|
|---|
| 1688 | sshift += s_inc;
|
|---|
| 1689 | }
|
|---|
| 1690 | break;
|
|---|
| 1691 | }
|
|---|
| 1692 |
|
|---|
| 1693 | /*====================================================================*/
|
|---|
| 1694 |
|
|---|
| 1695 | default: /* 8-bit or larger (this is where the routine is modified) */
|
|---|
| 1696 | {
|
|---|
| 1697 | #if 0
|
|---|
| 1698 | // static unsigned long long _const4 = 0x0000000000FFFFFFLL; no good
|
|---|
| 1699 | // static unsigned long long const4 = 0x0000000000FFFFFFLL; no good
|
|---|
| 1700 | // unsigned long long _const4 = 0x0000000000FFFFFFLL; no good
|
|---|
| 1701 | // unsigned long long const4 = 0x0000000000FFFFFFLL; no good
|
|---|
| 1702 | #endif
|
|---|
| 1703 | png_bytep sptr, dp;
|
|---|
| 1704 | png_uint_32 i;
|
|---|
| 1705 | png_size_t pixel_bytes;
|
|---|
| 1706 | int width = (int)row_info->width;
|
|---|
| 1707 |
|
|---|
| 1708 | pixel_bytes = (row_info->pixel_depth >> 3);
|
|---|
| 1709 |
|
|---|
| 1710 | /* point sptr at the last pixel in the pre-expanded row: */
|
|---|
| 1711 | sptr = row + (width - 1) * pixel_bytes;
|
|---|
| 1712 |
|
|---|
| 1713 | /* point dp at the last pixel position in the expanded row: */
|
|---|
| 1714 | dp = row + (final_width - 1) * pixel_bytes;
|
|---|
| 1715 |
|
|---|
| 1716 | /* New code by Nirav Chhatrapati - Intel Corporation */
|
|---|
| 1717 |
|
|---|
| 1718 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
|
|---|
| 1719 | #if !defined(PNG_1_0_X)
|
|---|
| 1720 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_INTERLACE)
|
|---|
| 1721 | /* && _mmx_supported */ )
|
|---|
| 1722 | #else
|
|---|
| 1723 | if (_mmx_supported)
|
|---|
| 1724 | #endif
|
|---|
| 1725 | {
|
|---|
| 1726 | //--------------------------------------------------------------
|
|---|
| 1727 | if (pixel_bytes == 3)
|
|---|
| 1728 | {
|
|---|
| 1729 | if (((pass == 0) || (pass == 1)) && width)
|
|---|
| 1730 | {
|
|---|
| 1731 | int dummy_value_c; // fix 'forbidden register spilled'
|
|---|
| 1732 | int dummy_value_S;
|
|---|
| 1733 | int dummy_value_D;
|
|---|
| 1734 |
|
|---|
| 1735 | __asm__ __volatile__ (
|
|---|
| 1736 | "subl $21, %%edi \n\t"
|
|---|
| 1737 | // (png_pass_inc[pass] - 1)*pixel_bytes
|
|---|
| 1738 |
|
|---|
| 1739 | ".loop3_pass0: \n\t"
|
|---|
| 1740 | "movd (%%esi), %%mm0 \n\t" // x x x x x 2 1 0
|
|---|
| 1741 | "pand _const4, %%mm0 \n\t" // z z z z z 2 1 0
|
|---|
| 1742 | "movq %%mm0, %%mm1 \n\t" // z z z z z 2 1 0
|
|---|
| 1743 | "psllq $16, %%mm0 \n\t" // z z z 2 1 0 z z
|
|---|
| 1744 | "movq %%mm0, %%mm2 \n\t" // z z z 2 1 0 z z
|
|---|
| 1745 | "psllq $24, %%mm0 \n\t" // 2 1 0 z z z z z
|
|---|
| 1746 | "psrlq $8, %%mm1 \n\t" // z z z z z z 2 1
|
|---|
| 1747 | "por %%mm2, %%mm0 \n\t" // 2 1 0 2 1 0 z z
|
|---|
| 1748 | "por %%mm1, %%mm0 \n\t" // 2 1 0 2 1 0 2 1
|
|---|
| 1749 | "movq %%mm0, %%mm3 \n\t" // 2 1 0 2 1 0 2 1
|
|---|
| 1750 | "psllq $16, %%mm0 \n\t" // 0 2 1 0 2 1 z z
|
|---|
| 1751 | "movq %%mm3, %%mm4 \n\t" // 2 1 0 2 1 0 2 1
|
|---|
| 1752 | "punpckhdq %%mm0, %%mm3 \n\t" // 0 2 1 0 2 1 0 2
|
|---|
| 1753 | "movq %%mm4, 16(%%edi) \n\t"
|
|---|
| 1754 | "psrlq $32, %%mm0 \n\t" // z z z z 0 2 1 0
|
|---|
| 1755 | "movq %%mm3, 8(%%edi) \n\t"
|
|---|
| 1756 | "punpckldq %%mm4, %%mm0 \n\t" // 1 0 2 1 0 2 1 0
|
|---|
| 1757 | "subl $3, %%esi \n\t"
|
|---|
| 1758 | "movq %%mm0, (%%edi) \n\t"
|
|---|
| 1759 | "subl $24, %%edi \n\t"
|
|---|
| 1760 | "decl %%ecx \n\t"
|
|---|
| 1761 | "jnz .loop3_pass0 \n\t"
|
|---|
| 1762 | "EMMS \n\t" // DONE
|
|---|
| 1763 |
|
|---|
| 1764 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 1765 | "=S" (dummy_value_S),
|
|---|
| 1766 | "=D" (dummy_value_D)
|
|---|
| 1767 |
|
|---|
| 1768 | : "1" (sptr), // esi // input regs
|
|---|
| 1769 | "2" (dp), // edi
|
|---|
| 1770 | "0" (width) // ecx
|
|---|
| 1771 | // doesn't work "i" (0x0000000000FFFFFFLL) // %1 (a.k.a. _const4)
|
|---|
| 1772 |
|
|---|
| 1773 | #if 0 /* %mm0, ..., %mm4 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 1774 | : "%mm0", "%mm1", "%mm2" // clobber list
|
|---|
| 1775 | , "%mm3", "%mm4"
|
|---|
| 1776 | #endif
|
|---|
| 1777 | );
|
|---|
| 1778 | }
|
|---|
| 1779 | else if (((pass == 2) || (pass == 3)) && width)
|
|---|
| 1780 | {
|
|---|
| 1781 | int dummy_value_c; // fix 'forbidden register spilled'
|
|---|
| 1782 | int dummy_value_S;
|
|---|
| 1783 | int dummy_value_D;
|
|---|
| 1784 |
|
|---|
| 1785 | __asm__ __volatile__ (
|
|---|
| 1786 | "subl $9, %%edi \n\t"
|
|---|
| 1787 | // (png_pass_inc[pass] - 1)*pixel_bytes
|
|---|
| 1788 |
|
|---|
| 1789 | ".loop3_pass2: \n\t"
|
|---|
| 1790 | "movd (%%esi), %%mm0 \n\t" // x x x x x 2 1 0
|
|---|
| 1791 | "pand _const4, %%mm0 \n\t" // z z z z z 2 1 0
|
|---|
| 1792 | "movq %%mm0, %%mm1 \n\t" // z z z z z 2 1 0
|
|---|
| 1793 | "psllq $16, %%mm0 \n\t" // z z z 2 1 0 z z
|
|---|
| 1794 | "movq %%mm0, %%mm2 \n\t" // z z z 2 1 0 z z
|
|---|
| 1795 | "psllq $24, %%mm0 \n\t" // 2 1 0 z z z z z
|
|---|
| 1796 | "psrlq $8, %%mm1 \n\t" // z z z z z z 2 1
|
|---|
| 1797 | "por %%mm2, %%mm0 \n\t" // 2 1 0 2 1 0 z z
|
|---|
| 1798 | "por %%mm1, %%mm0 \n\t" // 2 1 0 2 1 0 2 1
|
|---|
| 1799 | "movq %%mm0, 4(%%edi) \n\t"
|
|---|
| 1800 | "psrlq $16, %%mm0 \n\t" // z z 2 1 0 2 1 0
|
|---|
| 1801 | "subl $3, %%esi \n\t"
|
|---|
| 1802 | "movd %%mm0, (%%edi) \n\t"
|
|---|
| 1803 | "subl $12, %%edi \n\t"
|
|---|
| 1804 | "decl %%ecx \n\t"
|
|---|
| 1805 | "jnz .loop3_pass2 \n\t"
|
|---|
| 1806 | "EMMS \n\t" // DONE
|
|---|
| 1807 |
|
|---|
| 1808 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 1809 | "=S" (dummy_value_S),
|
|---|
| 1810 | "=D" (dummy_value_D)
|
|---|
| 1811 |
|
|---|
| 1812 | : "1" (sptr), // esi // input regs
|
|---|
| 1813 | "2" (dp), // edi
|
|---|
| 1814 | "0" (width) // ecx
|
|---|
| 1815 |
|
|---|
| 1816 | #if 0 /* %mm0, ..., %mm2 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 1817 | : "%mm0", "%mm1", "%mm2" // clobber list
|
|---|
| 1818 | #endif
|
|---|
| 1819 | );
|
|---|
| 1820 | }
|
|---|
| 1821 | else if (width) /* && ((pass == 4) || (pass == 5)) */
|
|---|
| 1822 | {
|
|---|
| 1823 | int width_mmx = ((width >> 1) << 1) - 8; // GRR: huh?
|
|---|
| 1824 | if (width_mmx < 0)
|
|---|
| 1825 | width_mmx = 0;
|
|---|
| 1826 | width -= width_mmx; // 8 or 9 pix, 24 or 27 bytes
|
|---|
| 1827 | if (width_mmx)
|
|---|
| 1828 | {
|
|---|
| 1829 | // png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
|
|---|
| 1830 | // sptr points at last pixel in pre-expanded row
|
|---|
| 1831 | // dp points at last pixel position in expanded row
|
|---|
| 1832 | int dummy_value_c; // fix 'forbidden register spilled'
|
|---|
| 1833 | int dummy_value_S;
|
|---|
| 1834 | int dummy_value_D;
|
|---|
| 1835 |
|
|---|
| 1836 | __asm__ __volatile__ (
|
|---|
| 1837 | "subl $3, %%esi \n\t"
|
|---|
| 1838 | "subl $9, %%edi \n\t"
|
|---|
| 1839 | // (png_pass_inc[pass] + 1)*pixel_bytes
|
|---|
| 1840 |
|
|---|
| 1841 | ".loop3_pass4: \n\t"
|
|---|
| 1842 | "movq (%%esi), %%mm0 \n\t" // x x 5 4 3 2 1 0
|
|---|
| 1843 | "movq %%mm0, %%mm1 \n\t" // x x 5 4 3 2 1 0
|
|---|
| 1844 | "movq %%mm0, %%mm2 \n\t" // x x 5 4 3 2 1 0
|
|---|
| 1845 | "psllq $24, %%mm0 \n\t" // 4 3 2 1 0 z z z
|
|---|
| 1846 | "pand _const4, %%mm1 \n\t" // z z z z z 2 1 0
|
|---|
| 1847 | "psrlq $24, %%mm2 \n\t" // z z z x x 5 4 3
|
|---|
| 1848 | "por %%mm1, %%mm0 \n\t" // 4 3 2 1 0 2 1 0
|
|---|
| 1849 | "movq %%mm2, %%mm3 \n\t" // z z z x x 5 4 3
|
|---|
| 1850 | "psllq $8, %%mm2 \n\t" // z z x x 5 4 3 z
|
|---|
| 1851 | "movq %%mm0, (%%edi) \n\t"
|
|---|
| 1852 | "psrlq $16, %%mm3 \n\t" // z z z z z x x 5
|
|---|
| 1853 | "pand _const6, %%mm3 \n\t" // z z z z z z z 5
|
|---|
| 1854 | "por %%mm3, %%mm2 \n\t" // z z x x 5 4 3 5
|
|---|
| 1855 | "subl $6, %%esi \n\t"
|
|---|
| 1856 | "movd %%mm2, 8(%%edi) \n\t"
|
|---|
| 1857 | "subl $12, %%edi \n\t"
|
|---|
| 1858 | "subl $2, %%ecx \n\t"
|
|---|
| 1859 | "jnz .loop3_pass4 \n\t"
|
|---|
| 1860 | "EMMS \n\t" // DONE
|
|---|
| 1861 |
|
|---|
| 1862 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 1863 | "=S" (dummy_value_S),
|
|---|
| 1864 | "=D" (dummy_value_D)
|
|---|
| 1865 |
|
|---|
| 1866 | : "1" (sptr), // esi // input regs
|
|---|
| 1867 | "2" (dp), // edi
|
|---|
| 1868 | "0" (width_mmx) // ecx
|
|---|
| 1869 |
|
|---|
| 1870 | #if 0 /* %mm0, ..., %mm3 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 1871 | : "%mm0", "%mm1" // clobber list
|
|---|
| 1872 | , "%mm2", "%mm3"
|
|---|
| 1873 | #endif
|
|---|
| 1874 | );
|
|---|
| 1875 | }
|
|---|
| 1876 |
|
|---|
| 1877 | sptr -= width_mmx*3;
|
|---|
| 1878 | dp -= width_mmx*6;
|
|---|
| 1879 | for (i = width; i; i--)
|
|---|
| 1880 | {
|
|---|
| 1881 | png_byte v[8];
|
|---|
| 1882 | int j;
|
|---|
| 1883 |
|
|---|
| 1884 | png_memcpy(v, sptr, 3);
|
|---|
| 1885 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 1886 | {
|
|---|
| 1887 | png_memcpy(dp, v, 3);
|
|---|
| 1888 | dp -= 3;
|
|---|
| 1889 | }
|
|---|
| 1890 | sptr -= 3;
|
|---|
| 1891 | }
|
|---|
| 1892 | }
|
|---|
| 1893 | } /* end of pixel_bytes == 3 */
|
|---|
| 1894 |
|
|---|
| 1895 | //--------------------------------------------------------------
|
|---|
| 1896 | else if (pixel_bytes == 1)
|
|---|
| 1897 | {
|
|---|
| 1898 | if (((pass == 0) || (pass == 1)) && width)
|
|---|
| 1899 | {
|
|---|
| 1900 | int width_mmx = ((width >> 2) << 2);
|
|---|
| 1901 | width -= width_mmx; // 0-3 pixels => 0-3 bytes
|
|---|
| 1902 | if (width_mmx)
|
|---|
| 1903 | {
|
|---|
| 1904 | int dummy_value_c; // fix 'forbidden register spilled'
|
|---|
| 1905 | int dummy_value_S;
|
|---|
| 1906 | int dummy_value_D;
|
|---|
| 1907 |
|
|---|
| 1908 | __asm__ __volatile__ (
|
|---|
| 1909 | "subl $3, %%esi \n\t"
|
|---|
| 1910 | "subl $31, %%edi \n\t"
|
|---|
| 1911 |
|
|---|
| 1912 | ".loop1_pass0: \n\t"
|
|---|
| 1913 | "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0
|
|---|
| 1914 | "movq %%mm0, %%mm1 \n\t" // x x x x 3 2 1 0
|
|---|
| 1915 | "punpcklbw %%mm0, %%mm0 \n\t" // 3 3 2 2 1 1 0 0
|
|---|
| 1916 | "movq %%mm0, %%mm2 \n\t" // 3 3 2 2 1 1 0 0
|
|---|
| 1917 | "punpcklwd %%mm0, %%mm0 \n\t" // 1 1 1 1 0 0 0 0
|
|---|
| 1918 | "movq %%mm0, %%mm3 \n\t" // 1 1 1 1 0 0 0 0
|
|---|
| 1919 | "punpckldq %%mm0, %%mm0 \n\t" // 0 0 0 0 0 0 0 0
|
|---|
| 1920 | "punpckhdq %%mm3, %%mm3 \n\t" // 1 1 1 1 1 1 1 1
|
|---|
| 1921 | "movq %%mm0, (%%edi) \n\t"
|
|---|
| 1922 | "punpckhwd %%mm2, %%mm2 \n\t" // 3 3 3 3 2 2 2 2
|
|---|
| 1923 | "movq %%mm3, 8(%%edi) \n\t"
|
|---|
| 1924 | "movq %%mm2, %%mm4 \n\t" // 3 3 3 3 2 2 2 2
|
|---|
| 1925 | "punpckldq %%mm2, %%mm2 \n\t" // 2 2 2 2 2 2 2 2
|
|---|
| 1926 | "punpckhdq %%mm4, %%mm4 \n\t" // 3 3 3 3 3 3 3 3
|
|---|
| 1927 | "movq %%mm2, 16(%%edi) \n\t"
|
|---|
| 1928 | "subl $4, %%esi \n\t"
|
|---|
| 1929 | "movq %%mm4, 24(%%edi) \n\t"
|
|---|
| 1930 | "subl $32, %%edi \n\t"
|
|---|
| 1931 | "subl $4, %%ecx \n\t"
|
|---|
| 1932 | "jnz .loop1_pass0 \n\t"
|
|---|
| 1933 | "EMMS \n\t" // DONE
|
|---|
| 1934 |
|
|---|
| 1935 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 1936 | "=S" (dummy_value_S),
|
|---|
| 1937 | "=D" (dummy_value_D)
|
|---|
| 1938 |
|
|---|
| 1939 | : "1" (sptr), // esi // input regs
|
|---|
| 1940 | "2" (dp), // edi
|
|---|
| 1941 | "0" (width_mmx) // ecx
|
|---|
| 1942 |
|
|---|
| 1943 | #if 0 /* %mm0, ..., %mm4 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 1944 | : "%mm0", "%mm1", "%mm2" // clobber list
|
|---|
| 1945 | , "%mm3", "%mm4"
|
|---|
| 1946 | #endif
|
|---|
| 1947 | );
|
|---|
| 1948 | }
|
|---|
| 1949 |
|
|---|
| 1950 | sptr -= width_mmx;
|
|---|
| 1951 | dp -= width_mmx*8;
|
|---|
| 1952 | for (i = width; i; i--)
|
|---|
| 1953 | {
|
|---|
| 1954 | int j;
|
|---|
| 1955 |
|
|---|
| 1956 | /* I simplified this part in version 1.0.4e
|
|---|
| 1957 | * here and in several other instances where
|
|---|
| 1958 | * pixel_bytes == 1 -- GR-P
|
|---|
| 1959 | *
|
|---|
| 1960 | * Original code:
|
|---|
| 1961 | *
|
|---|
| 1962 | * png_byte v[8];
|
|---|
| 1963 | * png_memcpy(v, sptr, pixel_bytes);
|
|---|
| 1964 | * for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 1965 | * {
|
|---|
| 1966 | * png_memcpy(dp, v, pixel_bytes);
|
|---|
| 1967 | * dp -= pixel_bytes;
|
|---|
| 1968 | * }
|
|---|
| 1969 | * sptr -= pixel_bytes;
|
|---|
| 1970 | *
|
|---|
| 1971 | * Replacement code is in the next three lines:
|
|---|
| 1972 | */
|
|---|
| 1973 |
|
|---|
| 1974 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 1975 | {
|
|---|
| 1976 | *dp-- = *sptr;
|
|---|
| 1977 | }
|
|---|
| 1978 | --sptr;
|
|---|
| 1979 | }
|
|---|
| 1980 | }
|
|---|
| 1981 | else if (((pass == 2) || (pass == 3)) && width)
|
|---|
| 1982 | {
|
|---|
| 1983 | int width_mmx = ((width >> 2) << 2);
|
|---|
| 1984 | width -= width_mmx; // 0-3 pixels => 0-3 bytes
|
|---|
| 1985 | if (width_mmx)
|
|---|
| 1986 | {
|
|---|
| 1987 | int dummy_value_c; // fix 'forbidden register spilled'
|
|---|
| 1988 | int dummy_value_S;
|
|---|
| 1989 | int dummy_value_D;
|
|---|
| 1990 |
|
|---|
| 1991 | __asm__ __volatile__ (
|
|---|
| 1992 | "subl $3, %%esi \n\t"
|
|---|
| 1993 | "subl $15, %%edi \n\t"
|
|---|
| 1994 |
|
|---|
| 1995 | ".loop1_pass2: \n\t"
|
|---|
| 1996 | "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0
|
|---|
| 1997 | "punpcklbw %%mm0, %%mm0 \n\t" // 3 3 2 2 1 1 0 0
|
|---|
| 1998 | "movq %%mm0, %%mm1 \n\t" // 3 3 2 2 1 1 0 0
|
|---|
| 1999 | "punpcklwd %%mm0, %%mm0 \n\t" // 1 1 1 1 0 0 0 0
|
|---|
| 2000 | "punpckhwd %%mm1, %%mm1 \n\t" // 3 3 3 3 2 2 2 2
|
|---|
| 2001 | "movq %%mm0, (%%edi) \n\t"
|
|---|
| 2002 | "subl $4, %%esi \n\t"
|
|---|
| 2003 | "movq %%mm1, 8(%%edi) \n\t"
|
|---|
| 2004 | "subl $16, %%edi \n\t"
|
|---|
| 2005 | "subl $4, %%ecx \n\t"
|
|---|
| 2006 | "jnz .loop1_pass2 \n\t"
|
|---|
| 2007 | "EMMS \n\t" // DONE
|
|---|
| 2008 |
|
|---|
| 2009 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 2010 | "=S" (dummy_value_S),
|
|---|
| 2011 | "=D" (dummy_value_D)
|
|---|
| 2012 |
|
|---|
| 2013 | : "1" (sptr), // esi // input regs
|
|---|
| 2014 | "2" (dp), // edi
|
|---|
| 2015 | "0" (width_mmx) // ecx
|
|---|
| 2016 |
|
|---|
| 2017 | #if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 2018 | : "%mm0", "%mm1" // clobber list
|
|---|
| 2019 | #endif
|
|---|
| 2020 | );
|
|---|
| 2021 | }
|
|---|
| 2022 |
|
|---|
| 2023 | sptr -= width_mmx;
|
|---|
| 2024 | dp -= width_mmx*4;
|
|---|
| 2025 | for (i = width; i; i--)
|
|---|
| 2026 | {
|
|---|
| 2027 | int j;
|
|---|
| 2028 |
|
|---|
| 2029 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 2030 | {
|
|---|
| 2031 | *dp-- = *sptr;
|
|---|
| 2032 | }
|
|---|
| 2033 | --sptr;
|
|---|
| 2034 | }
|
|---|
| 2035 | }
|
|---|
| 2036 | else if (width) /* && ((pass == 4) || (pass == 5)) */
|
|---|
| 2037 | {
|
|---|
| 2038 | int width_mmx = ((width >> 3) << 3);
|
|---|
| 2039 | width -= width_mmx; // 0-3 pixels => 0-3 bytes
|
|---|
| 2040 | if (width_mmx)
|
|---|
| 2041 | {
|
|---|
| 2042 | int dummy_value_c; // fix 'forbidden register spilled'
|
|---|
| 2043 | int dummy_value_S;
|
|---|
| 2044 | int dummy_value_D;
|
|---|
| 2045 |
|
|---|
| 2046 | __asm__ __volatile__ (
|
|---|
| 2047 | "subl $7, %%esi \n\t"
|
|---|
| 2048 | "subl $15, %%edi \n\t"
|
|---|
| 2049 |
|
|---|
| 2050 | ".loop1_pass4: \n\t"
|
|---|
| 2051 | "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
|
|---|
| 2052 | "movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0
|
|---|
| 2053 | "punpcklbw %%mm0, %%mm0 \n\t" // 3 3 2 2 1 1 0 0
|
|---|
| 2054 | "punpckhbw %%mm1, %%mm1 \n\t" // 7 7 6 6 5 5 4 4
|
|---|
| 2055 | "movq %%mm1, 8(%%edi) \n\t"
|
|---|
| 2056 | "subl $8, %%esi \n\t"
|
|---|
| 2057 | "movq %%mm0, (%%edi) \n\t"
|
|---|
| 2058 | "subl $16, %%edi \n\t"
|
|---|
| 2059 | "subl $8, %%ecx \n\t"
|
|---|
| 2060 | "jnz .loop1_pass4 \n\t"
|
|---|
| 2061 | "EMMS \n\t" // DONE
|
|---|
| 2062 |
|
|---|
| 2063 | : "=c" (dummy_value_c), // output regs (none)
|
|---|
| 2064 | "=S" (dummy_value_S),
|
|---|
| 2065 | "=D" (dummy_value_D)
|
|---|
| 2066 |
|
|---|
| 2067 | : "1" (sptr), // esi // input regs
|
|---|
| 2068 | "2" (dp), // edi
|
|---|
| 2069 | "0" (width_mmx) // ecx
|
|---|
| 2070 |
|
|---|
| 2071 | #if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 2072 | : "%mm0", "%mm1" // clobber list
|
|---|
| 2073 | #endif
|
|---|
| 2074 | );
|
|---|
| 2075 | }
|
|---|
| 2076 |
|
|---|
| 2077 | sptr -= width_mmx;
|
|---|
| 2078 | dp -= width_mmx*2;
|
|---|
| 2079 | for (i = width; i; i--)
|
|---|
| 2080 | {
|
|---|
| 2081 | int j;
|
|---|
| 2082 |
|
|---|
| 2083 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 2084 | {
|
|---|
| 2085 | *dp-- = *sptr;
|
|---|
| 2086 | }
|
|---|
| 2087 | --sptr;
|
|---|
| 2088 | }
|
|---|
| 2089 | }
|
|---|
| 2090 | } /* end of pixel_bytes == 1 */
|
|---|
| 2091 |
|
|---|
| 2092 | //--------------------------------------------------------------
|
|---|
| 2093 | else if (pixel_bytes == 2)
|
|---|
| 2094 | {
|
|---|
| 2095 | if (((pass == 0) || (pass == 1)) && width)
|
|---|
| 2096 | {
|
|---|
| 2097 | int width_mmx = ((width >> 1) << 1);
|
|---|
| 2098 | width -= width_mmx; // 0,1 pixels => 0,2 bytes
|
|---|
| 2099 | if (width_mmx)
|
|---|
| 2100 | {
|
|---|
| 2101 | int dummy_value_c; // fix 'forbidden register spilled'
|
|---|
| 2102 | int dummy_value_S;
|
|---|
| 2103 | int dummy_value_D;
|
|---|
| 2104 |
|
|---|
| 2105 | __asm__ __volatile__ (
|
|---|
| 2106 | "subl $2, %%esi \n\t"
|
|---|
| 2107 | "subl $30, %%edi \n\t"
|
|---|
| 2108 |
|
|---|
| 2109 | ".loop2_pass0: \n\t"
|
|---|
| 2110 | "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0
|
|---|
| 2111 | "punpcklwd %%mm0, %%mm0 \n\t" // 3 2 3 2 1 0 1 0
|
|---|
| 2112 | "movq %%mm0, %%mm1 \n\t" // 3 2 3 2 1 0 1 0
|
|---|
| 2113 | "punpckldq %%mm0, %%mm0 \n\t" // 1 0 1 0 1 0 1 0
|
|---|
| 2114 | "punpckhdq %%mm1, %%mm1 \n\t" // 3 2 3 2 3 2 3 2
|
|---|
| 2115 | "movq %%mm0, (%%edi) \n\t"
|
|---|
| 2116 | "movq %%mm0, 8(%%edi) \n\t"
|
|---|
| 2117 | "movq %%mm1, 16(%%edi) \n\t"
|
|---|
| 2118 | "subl $4, %%esi \n\t"
|
|---|
| 2119 | "movq %%mm1, 24(%%edi) \n\t"
|
|---|
| 2120 | "subl $32, %%edi \n\t"
|
|---|
| 2121 | "subl $2, %%ecx \n\t"
|
|---|
| 2122 | "jnz .loop2_pass0 \n\t"
|
|---|
| 2123 | "EMMS \n\t" // DONE
|
|---|
| 2124 |
|
|---|
| 2125 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 2126 | "=S" (dummy_value_S),
|
|---|
| 2127 | "=D" (dummy_value_D)
|
|---|
| 2128 |
|
|---|
| 2129 | : "1" (sptr), // esi // input regs
|
|---|
| 2130 | "2" (dp), // edi
|
|---|
| 2131 | "0" (width_mmx) // ecx
|
|---|
| 2132 |
|
|---|
| 2133 | #if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 2134 | : "%mm0", "%mm1" // clobber list
|
|---|
| 2135 | #endif
|
|---|
| 2136 | );
|
|---|
| 2137 | }
|
|---|
| 2138 |
|
|---|
| 2139 | sptr -= (width_mmx*2 - 2); // sign fixed
|
|---|
| 2140 | dp -= (width_mmx*16 - 2); // sign fixed
|
|---|
| 2141 | for (i = width; i; i--)
|
|---|
| 2142 | {
|
|---|
| 2143 | png_byte v[8];
|
|---|
| 2144 | int j;
|
|---|
| 2145 | sptr -= 2;
|
|---|
| 2146 | png_memcpy(v, sptr, 2);
|
|---|
| 2147 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 2148 | {
|
|---|
| 2149 | dp -= 2;
|
|---|
| 2150 | png_memcpy(dp, v, 2);
|
|---|
| 2151 | }
|
|---|
| 2152 | }
|
|---|
| 2153 | }
|
|---|
| 2154 | else if (((pass == 2) || (pass == 3)) && width)
|
|---|
| 2155 | {
|
|---|
| 2156 | int width_mmx = ((width >> 1) << 1) ;
|
|---|
| 2157 | width -= width_mmx; // 0,1 pixels => 0,2 bytes
|
|---|
| 2158 | if (width_mmx)
|
|---|
| 2159 | {
|
|---|
| 2160 | int dummy_value_c; // fix 'forbidden register spilled'
|
|---|
| 2161 | int dummy_value_S;
|
|---|
| 2162 | int dummy_value_D;
|
|---|
| 2163 |
|
|---|
| 2164 | __asm__ __volatile__ (
|
|---|
| 2165 | "subl $2, %%esi \n\t"
|
|---|
| 2166 | "subl $14, %%edi \n\t"
|
|---|
| 2167 |
|
|---|
| 2168 | ".loop2_pass2: \n\t"
|
|---|
| 2169 | "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0
|
|---|
| 2170 | "punpcklwd %%mm0, %%mm0 \n\t" // 3 2 3 2 1 0 1 0
|
|---|
| 2171 | "movq %%mm0, %%mm1 \n\t" // 3 2 3 2 1 0 1 0
|
|---|
| 2172 | "punpckldq %%mm0, %%mm0 \n\t" // 1 0 1 0 1 0 1 0
|
|---|
| 2173 | "punpckhdq %%mm1, %%mm1 \n\t" // 3 2 3 2 3 2 3 2
|
|---|
| 2174 | "movq %%mm0, (%%edi) \n\t"
|
|---|
| 2175 | "subl $4, %%esi \n\t"
|
|---|
| 2176 | "movq %%mm1, 8(%%edi) \n\t"
|
|---|
| 2177 | "subl $16, %%edi \n\t"
|
|---|
| 2178 | "subl $2, %%ecx \n\t"
|
|---|
| 2179 | "jnz .loop2_pass2 \n\t"
|
|---|
| 2180 | "EMMS \n\t" // DONE
|
|---|
| 2181 |
|
|---|
| 2182 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 2183 | "=S" (dummy_value_S),
|
|---|
| 2184 | "=D" (dummy_value_D)
|
|---|
| 2185 |
|
|---|
| 2186 | : "1" (sptr), // esi // input regs
|
|---|
| 2187 | "2" (dp), // edi
|
|---|
| 2188 | "0" (width_mmx) // ecx
|
|---|
| 2189 |
|
|---|
| 2190 | #if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 2191 | : "%mm0", "%mm1" // clobber list
|
|---|
| 2192 | #endif
|
|---|
| 2193 | );
|
|---|
| 2194 | }
|
|---|
| 2195 |
|
|---|
| 2196 | sptr -= (width_mmx*2 - 2); // sign fixed
|
|---|
| 2197 | dp -= (width_mmx*8 - 2); // sign fixed
|
|---|
| 2198 | for (i = width; i; i--)
|
|---|
| 2199 | {
|
|---|
| 2200 | png_byte v[8];
|
|---|
| 2201 | int j;
|
|---|
| 2202 | sptr -= 2;
|
|---|
| 2203 | png_memcpy(v, sptr, 2);
|
|---|
| 2204 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 2205 | {
|
|---|
| 2206 | dp -= 2;
|
|---|
| 2207 | png_memcpy(dp, v, 2);
|
|---|
| 2208 | }
|
|---|
| 2209 | }
|
|---|
| 2210 | }
|
|---|
| 2211 | else if (width) // pass == 4 or 5
|
|---|
| 2212 | {
|
|---|
| 2213 | int width_mmx = ((width >> 1) << 1) ;
|
|---|
| 2214 | width -= width_mmx; // 0,1 pixels => 0,2 bytes
|
|---|
| 2215 | if (width_mmx)
|
|---|
| 2216 | {
|
|---|
| 2217 | int dummy_value_c; // fix 'forbidden register spilled'
|
|---|
| 2218 | int dummy_value_S;
|
|---|
| 2219 | int dummy_value_D;
|
|---|
| 2220 |
|
|---|
| 2221 | __asm__ __volatile__ (
|
|---|
| 2222 | "subl $2, %%esi \n\t"
|
|---|
| 2223 | "subl $6, %%edi \n\t"
|
|---|
| 2224 |
|
|---|
| 2225 | ".loop2_pass4: \n\t"
|
|---|
| 2226 | "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0
|
|---|
| 2227 | "punpcklwd %%mm0, %%mm0 \n\t" // 3 2 3 2 1 0 1 0
|
|---|
| 2228 | "subl $4, %%esi \n\t"
|
|---|
| 2229 | "movq %%mm0, (%%edi) \n\t"
|
|---|
| 2230 | "subl $8, %%edi \n\t"
|
|---|
| 2231 | "subl $2, %%ecx \n\t"
|
|---|
| 2232 | "jnz .loop2_pass4 \n\t"
|
|---|
| 2233 | "EMMS \n\t" // DONE
|
|---|
| 2234 |
|
|---|
| 2235 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 2236 | "=S" (dummy_value_S),
|
|---|
| 2237 | "=D" (dummy_value_D)
|
|---|
| 2238 |
|
|---|
| 2239 | : "1" (sptr), // esi // input regs
|
|---|
| 2240 | "2" (dp), // edi
|
|---|
| 2241 | "0" (width_mmx) // ecx
|
|---|
| 2242 |
|
|---|
| 2243 | #if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 2244 | : "%mm0" // clobber list
|
|---|
| 2245 | #endif
|
|---|
| 2246 | );
|
|---|
| 2247 | }
|
|---|
| 2248 |
|
|---|
| 2249 | sptr -= (width_mmx*2 - 2); // sign fixed
|
|---|
| 2250 | dp -= (width_mmx*4 - 2); // sign fixed
|
|---|
| 2251 | for (i = width; i; i--)
|
|---|
| 2252 | {
|
|---|
| 2253 | png_byte v[8];
|
|---|
| 2254 | int j;
|
|---|
| 2255 | sptr -= 2;
|
|---|
| 2256 | png_memcpy(v, sptr, 2);
|
|---|
| 2257 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 2258 | {
|
|---|
| 2259 | dp -= 2;
|
|---|
| 2260 | png_memcpy(dp, v, 2);
|
|---|
| 2261 | }
|
|---|
| 2262 | }
|
|---|
| 2263 | }
|
|---|
| 2264 | } /* end of pixel_bytes == 2 */
|
|---|
| 2265 |
|
|---|
| 2266 | //--------------------------------------------------------------
|
|---|
| 2267 | else if (pixel_bytes == 4)
|
|---|
| 2268 | {
|
|---|
| 2269 | if (((pass == 0) || (pass == 1)) && width)
|
|---|
| 2270 | {
|
|---|
| 2271 | int width_mmx = ((width >> 1) << 1);
|
|---|
| 2272 | width -= width_mmx; // 0,1 pixels => 0,4 bytes
|
|---|
| 2273 | if (width_mmx)
|
|---|
| 2274 | {
|
|---|
| 2275 | int dummy_value_c; // fix 'forbidden register spilled'
|
|---|
| 2276 | int dummy_value_S;
|
|---|
| 2277 | int dummy_value_D;
|
|---|
| 2278 |
|
|---|
| 2279 | __asm__ __volatile__ (
|
|---|
| 2280 | "subl $4, %%esi \n\t"
|
|---|
| 2281 | "subl $60, %%edi \n\t"
|
|---|
| 2282 |
|
|---|
| 2283 | ".loop4_pass0: \n\t"
|
|---|
| 2284 | "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
|
|---|
| 2285 | "movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0
|
|---|
| 2286 | "punpckldq %%mm0, %%mm0 \n\t" // 3 2 1 0 3 2 1 0
|
|---|
| 2287 | "punpckhdq %%mm1, %%mm1 \n\t" // 7 6 5 4 7 6 5 4
|
|---|
| 2288 | "movq %%mm0, (%%edi) \n\t"
|
|---|
| 2289 | "movq %%mm0, 8(%%edi) \n\t"
|
|---|
| 2290 | "movq %%mm0, 16(%%edi) \n\t"
|
|---|
| 2291 | "movq %%mm0, 24(%%edi) \n\t"
|
|---|
| 2292 | "movq %%mm1, 32(%%edi) \n\t"
|
|---|
| 2293 | "movq %%mm1, 40(%%edi) \n\t"
|
|---|
| 2294 | "movq %%mm1, 48(%%edi) \n\t"
|
|---|
| 2295 | "subl $8, %%esi \n\t"
|
|---|
| 2296 | "movq %%mm1, 56(%%edi) \n\t"
|
|---|
| 2297 | "subl $64, %%edi \n\t"
|
|---|
| 2298 | "subl $2, %%ecx \n\t"
|
|---|
| 2299 | "jnz .loop4_pass0 \n\t"
|
|---|
| 2300 | "EMMS \n\t" // DONE
|
|---|
| 2301 |
|
|---|
| 2302 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 2303 | "=S" (dummy_value_S),
|
|---|
| 2304 | "=D" (dummy_value_D)
|
|---|
| 2305 |
|
|---|
| 2306 | : "1" (sptr), // esi // input regs
|
|---|
| 2307 | "2" (dp), // edi
|
|---|
| 2308 | "0" (width_mmx) // ecx
|
|---|
| 2309 |
|
|---|
| 2310 | #if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 2311 | : "%mm0", "%mm1" // clobber list
|
|---|
| 2312 | #endif
|
|---|
| 2313 | );
|
|---|
| 2314 | }
|
|---|
| 2315 |
|
|---|
| 2316 | sptr -= (width_mmx*4 - 4); // sign fixed
|
|---|
| 2317 | dp -= (width_mmx*32 - 4); // sign fixed
|
|---|
| 2318 | for (i = width; i; i--)
|
|---|
| 2319 | {
|
|---|
| 2320 | png_byte v[8];
|
|---|
| 2321 | int j;
|
|---|
| 2322 | sptr -= 4;
|
|---|
| 2323 | png_memcpy(v, sptr, 4);
|
|---|
| 2324 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 2325 | {
|
|---|
| 2326 | dp -= 4;
|
|---|
| 2327 | png_memcpy(dp, v, 4);
|
|---|
| 2328 | }
|
|---|
| 2329 | }
|
|---|
| 2330 | }
|
|---|
| 2331 | else if (((pass == 2) || (pass == 3)) && width)
|
|---|
| 2332 | {
|
|---|
| 2333 | int width_mmx = ((width >> 1) << 1);
|
|---|
| 2334 | width -= width_mmx; // 0,1 pixels => 0,4 bytes
|
|---|
| 2335 | if (width_mmx)
|
|---|
| 2336 | {
|
|---|
| 2337 | int dummy_value_c; // fix 'forbidden register spilled'
|
|---|
| 2338 | int dummy_value_S;
|
|---|
| 2339 | int dummy_value_D;
|
|---|
| 2340 |
|
|---|
| 2341 | __asm__ __volatile__ (
|
|---|
| 2342 | "subl $4, %%esi \n\t"
|
|---|
| 2343 | "subl $28, %%edi \n\t"
|
|---|
| 2344 |
|
|---|
| 2345 | ".loop4_pass2: \n\t"
|
|---|
| 2346 | "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
|
|---|
| 2347 | "movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0
|
|---|
| 2348 | "punpckldq %%mm0, %%mm0 \n\t" // 3 2 1 0 3 2 1 0
|
|---|
| 2349 | "punpckhdq %%mm1, %%mm1 \n\t" // 7 6 5 4 7 6 5 4
|
|---|
| 2350 | "movq %%mm0, (%%edi) \n\t"
|
|---|
| 2351 | "movq %%mm0, 8(%%edi) \n\t"
|
|---|
| 2352 | "movq %%mm1, 16(%%edi) \n\t"
|
|---|
| 2353 | "movq %%mm1, 24(%%edi) \n\t"
|
|---|
| 2354 | "subl $8, %%esi \n\t"
|
|---|
| 2355 | "subl $32, %%edi \n\t"
|
|---|
| 2356 | "subl $2, %%ecx \n\t"
|
|---|
| 2357 | "jnz .loop4_pass2 \n\t"
|
|---|
| 2358 | "EMMS \n\t" // DONE
|
|---|
| 2359 |
|
|---|
| 2360 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 2361 | "=S" (dummy_value_S),
|
|---|
| 2362 | "=D" (dummy_value_D)
|
|---|
| 2363 |
|
|---|
| 2364 | : "1" (sptr), // esi // input regs
|
|---|
| 2365 | "2" (dp), // edi
|
|---|
| 2366 | "0" (width_mmx) // ecx
|
|---|
| 2367 |
|
|---|
| 2368 | #if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 2369 | : "%mm0", "%mm1" // clobber list
|
|---|
| 2370 | #endif
|
|---|
| 2371 | );
|
|---|
| 2372 | }
|
|---|
| 2373 |
|
|---|
| 2374 | sptr -= (width_mmx*4 - 4); // sign fixed
|
|---|
| 2375 | dp -= (width_mmx*16 - 4); // sign fixed
|
|---|
| 2376 | for (i = width; i; i--)
|
|---|
| 2377 | {
|
|---|
| 2378 | png_byte v[8];
|
|---|
| 2379 | int j;
|
|---|
| 2380 | sptr -= 4;
|
|---|
| 2381 | png_memcpy(v, sptr, 4);
|
|---|
| 2382 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 2383 | {
|
|---|
| 2384 | dp -= 4;
|
|---|
| 2385 | png_memcpy(dp, v, 4);
|
|---|
| 2386 | }
|
|---|
| 2387 | }
|
|---|
| 2388 | }
|
|---|
| 2389 | else if (width) // pass == 4 or 5
|
|---|
| 2390 | {
|
|---|
| 2391 | int width_mmx = ((width >> 1) << 1) ;
|
|---|
| 2392 | width -= width_mmx; // 0,1 pixels => 0,4 bytes
|
|---|
| 2393 | if (width_mmx)
|
|---|
| 2394 | {
|
|---|
| 2395 | int dummy_value_c; // fix 'forbidden register spilled'
|
|---|
| 2396 | int dummy_value_S;
|
|---|
| 2397 | int dummy_value_D;
|
|---|
| 2398 |
|
|---|
| 2399 | __asm__ __volatile__ (
|
|---|
| 2400 | "subl $4, %%esi \n\t"
|
|---|
| 2401 | "subl $12, %%edi \n\t"
|
|---|
| 2402 |
|
|---|
| 2403 | ".loop4_pass4: \n\t"
|
|---|
| 2404 | "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
|
|---|
| 2405 | "movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0
|
|---|
| 2406 | "punpckldq %%mm0, %%mm0 \n\t" // 3 2 1 0 3 2 1 0
|
|---|
| 2407 | "punpckhdq %%mm1, %%mm1 \n\t" // 7 6 5 4 7 6 5 4
|
|---|
| 2408 | "movq %%mm0, (%%edi) \n\t"
|
|---|
| 2409 | "subl $8, %%esi \n\t"
|
|---|
| 2410 | "movq %%mm1, 8(%%edi) \n\t"
|
|---|
| 2411 | "subl $16, %%edi \n\t"
|
|---|
| 2412 | "subl $2, %%ecx \n\t"
|
|---|
| 2413 | "jnz .loop4_pass4 \n\t"
|
|---|
| 2414 | "EMMS \n\t" // DONE
|
|---|
| 2415 |
|
|---|
| 2416 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 2417 | "=S" (dummy_value_S),
|
|---|
| 2418 | "=D" (dummy_value_D)
|
|---|
| 2419 |
|
|---|
| 2420 | : "1" (sptr), // esi // input regs
|
|---|
| 2421 | "2" (dp), // edi
|
|---|
| 2422 | "0" (width_mmx) // ecx
|
|---|
| 2423 |
|
|---|
| 2424 | #if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 2425 | : "%mm0", "%mm1" // clobber list
|
|---|
| 2426 | #endif
|
|---|
| 2427 | );
|
|---|
| 2428 | }
|
|---|
| 2429 |
|
|---|
| 2430 | sptr -= (width_mmx*4 - 4); // sign fixed
|
|---|
| 2431 | dp -= (width_mmx*8 - 4); // sign fixed
|
|---|
| 2432 | for (i = width; i; i--)
|
|---|
| 2433 | {
|
|---|
| 2434 | png_byte v[8];
|
|---|
| 2435 | int j;
|
|---|
| 2436 | sptr -= 4;
|
|---|
| 2437 | png_memcpy(v, sptr, 4);
|
|---|
| 2438 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 2439 | {
|
|---|
| 2440 | dp -= 4;
|
|---|
| 2441 | png_memcpy(dp, v, 4);
|
|---|
| 2442 | }
|
|---|
| 2443 | }
|
|---|
| 2444 | }
|
|---|
| 2445 | } /* end of pixel_bytes == 4 */
|
|---|
| 2446 |
|
|---|
| 2447 | //--------------------------------------------------------------
|
|---|
| 2448 | else if (pixel_bytes == 8)
|
|---|
| 2449 | {
|
|---|
| 2450 | // GRR TEST: should work, but needs testing (special 64-bit version of rpng2?)
|
|---|
| 2451 | // GRR NOTE: no need to combine passes here!
|
|---|
| 2452 | if (((pass == 0) || (pass == 1)) && width)
|
|---|
| 2453 | {
|
|---|
| 2454 | int dummy_value_c; // fix 'forbidden register spilled'
|
|---|
| 2455 | int dummy_value_S;
|
|---|
| 2456 | int dummy_value_D;
|
|---|
| 2457 |
|
|---|
| 2458 | // source is 8-byte RRGGBBAA
|
|---|
| 2459 | // dest is 64-byte RRGGBBAA RRGGBBAA RRGGBBAA RRGGBBAA ...
|
|---|
| 2460 | __asm__ __volatile__ (
|
|---|
| 2461 | "subl $56, %%edi \n\t" // start of last block
|
|---|
| 2462 |
|
|---|
| 2463 | ".loop8_pass0: \n\t"
|
|---|
| 2464 | "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
|
|---|
| 2465 | "movq %%mm0, (%%edi) \n\t"
|
|---|
| 2466 | "movq %%mm0, 8(%%edi) \n\t"
|
|---|
| 2467 | "movq %%mm0, 16(%%edi) \n\t"
|
|---|
| 2468 | "movq %%mm0, 24(%%edi) \n\t"
|
|---|
| 2469 | "movq %%mm0, 32(%%edi) \n\t"
|
|---|
| 2470 | "movq %%mm0, 40(%%edi) \n\t"
|
|---|
| 2471 | "movq %%mm0, 48(%%edi) \n\t"
|
|---|
| 2472 | "subl $8, %%esi \n\t"
|
|---|
| 2473 | "movq %%mm0, 56(%%edi) \n\t"
|
|---|
| 2474 | "subl $64, %%edi \n\t"
|
|---|
| 2475 | "decl %%ecx \n\t"
|
|---|
| 2476 | "jnz .loop8_pass0 \n\t"
|
|---|
| 2477 | "EMMS \n\t" // DONE
|
|---|
| 2478 |
|
|---|
| 2479 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 2480 | "=S" (dummy_value_S),
|
|---|
| 2481 | "=D" (dummy_value_D)
|
|---|
| 2482 |
|
|---|
| 2483 | : "1" (sptr), // esi // input regs
|
|---|
| 2484 | "2" (dp), // edi
|
|---|
| 2485 | "0" (width) // ecx
|
|---|
| 2486 |
|
|---|
| 2487 | #if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 2488 | : "%mm0" // clobber list
|
|---|
| 2489 | #endif
|
|---|
| 2490 | );
|
|---|
| 2491 | }
|
|---|
| 2492 | else if (((pass == 2) || (pass == 3)) && width)
|
|---|
| 2493 | {
|
|---|
| 2494 | // source is 8-byte RRGGBBAA
|
|---|
| 2495 | // dest is 32-byte RRGGBBAA RRGGBBAA RRGGBBAA RRGGBBAA
|
|---|
| 2496 | // (recall that expansion is _in place_: sptr and dp
|
|---|
| 2497 | // both point at locations within same row buffer)
|
|---|
| 2498 | {
|
|---|
| 2499 | int dummy_value_c; // fix 'forbidden register spilled'
|
|---|
| 2500 | int dummy_value_S;
|
|---|
| 2501 | int dummy_value_D;
|
|---|
| 2502 |
|
|---|
| 2503 | __asm__ __volatile__ (
|
|---|
| 2504 | "subl $24, %%edi \n\t" // start of last block
|
|---|
| 2505 |
|
|---|
| 2506 | ".loop8_pass2: \n\t"
|
|---|
| 2507 | "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
|
|---|
| 2508 | "movq %%mm0, (%%edi) \n\t"
|
|---|
| 2509 | "movq %%mm0, 8(%%edi) \n\t"
|
|---|
| 2510 | "movq %%mm0, 16(%%edi) \n\t"
|
|---|
| 2511 | "subl $8, %%esi \n\t"
|
|---|
| 2512 | "movq %%mm0, 24(%%edi) \n\t"
|
|---|
| 2513 | "subl $32, %%edi \n\t"
|
|---|
| 2514 | "decl %%ecx \n\t"
|
|---|
| 2515 | "jnz .loop8_pass2 \n\t"
|
|---|
| 2516 | "EMMS \n\t" // DONE
|
|---|
| 2517 |
|
|---|
| 2518 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 2519 | "=S" (dummy_value_S),
|
|---|
| 2520 | "=D" (dummy_value_D)
|
|---|
| 2521 |
|
|---|
| 2522 | : "1" (sptr), // esi // input regs
|
|---|
| 2523 | "2" (dp), // edi
|
|---|
| 2524 | "0" (width) // ecx
|
|---|
| 2525 |
|
|---|
| 2526 | #if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 2527 | : "%mm0" // clobber list
|
|---|
| 2528 | #endif
|
|---|
| 2529 | );
|
|---|
| 2530 | }
|
|---|
| 2531 | }
|
|---|
| 2532 | else if (width) // pass == 4 or 5
|
|---|
| 2533 | {
|
|---|
| 2534 | // source is 8-byte RRGGBBAA
|
|---|
| 2535 | // dest is 16-byte RRGGBBAA RRGGBBAA
|
|---|
| 2536 | {
|
|---|
| 2537 | int dummy_value_c; // fix 'forbidden register spilled'
|
|---|
| 2538 | int dummy_value_S;
|
|---|
| 2539 | int dummy_value_D;
|
|---|
| 2540 |
|
|---|
| 2541 | __asm__ __volatile__ (
|
|---|
| 2542 | "subl $8, %%edi \n\t" // start of last block
|
|---|
| 2543 |
|
|---|
| 2544 | ".loop8_pass4: \n\t"
|
|---|
| 2545 | "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0
|
|---|
| 2546 | "movq %%mm0, (%%edi) \n\t"
|
|---|
| 2547 | "subl $8, %%esi \n\t"
|
|---|
| 2548 | "movq %%mm0, 8(%%edi) \n\t"
|
|---|
| 2549 | "subl $16, %%edi \n\t"
|
|---|
| 2550 | "decl %%ecx \n\t"
|
|---|
| 2551 | "jnz .loop8_pass4 \n\t"
|
|---|
| 2552 | "EMMS \n\t" // DONE
|
|---|
| 2553 |
|
|---|
| 2554 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 2555 | "=S" (dummy_value_S),
|
|---|
| 2556 | "=D" (dummy_value_D)
|
|---|
| 2557 |
|
|---|
| 2558 | : "1" (sptr), // esi // input regs
|
|---|
| 2559 | "2" (dp), // edi
|
|---|
| 2560 | "0" (width) // ecx
|
|---|
| 2561 |
|
|---|
| 2562 | #if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 2563 | : "%mm0" // clobber list
|
|---|
| 2564 | #endif
|
|---|
| 2565 | );
|
|---|
| 2566 | }
|
|---|
| 2567 | }
|
|---|
| 2568 |
|
|---|
| 2569 | } /* end of pixel_bytes == 8 */
|
|---|
| 2570 |
|
|---|
| 2571 | //--------------------------------------------------------------
|
|---|
| 2572 | else if (pixel_bytes == 6)
|
|---|
| 2573 | {
|
|---|
| 2574 | for (i = width; i; i--)
|
|---|
| 2575 | {
|
|---|
| 2576 | png_byte v[8];
|
|---|
| 2577 | int j;
|
|---|
| 2578 | png_memcpy(v, sptr, 6);
|
|---|
| 2579 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 2580 | {
|
|---|
| 2581 | png_memcpy(dp, v, 6);
|
|---|
| 2582 | dp -= 6;
|
|---|
| 2583 | }
|
|---|
| 2584 | sptr -= 6;
|
|---|
| 2585 | }
|
|---|
| 2586 | } /* end of pixel_bytes == 6 */
|
|---|
| 2587 |
|
|---|
| 2588 | //--------------------------------------------------------------
|
|---|
| 2589 | else
|
|---|
| 2590 | {
|
|---|
| 2591 | for (i = width; i; i--)
|
|---|
| 2592 | {
|
|---|
| 2593 | png_byte v[8];
|
|---|
| 2594 | int j;
|
|---|
| 2595 | png_memcpy(v, sptr, pixel_bytes);
|
|---|
| 2596 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 2597 | {
|
|---|
| 2598 | png_memcpy(dp, v, pixel_bytes);
|
|---|
| 2599 | dp -= pixel_bytes;
|
|---|
| 2600 | }
|
|---|
| 2601 | sptr-= pixel_bytes;
|
|---|
| 2602 | }
|
|---|
| 2603 | }
|
|---|
| 2604 | } // end of _mmx_supported ========================================
|
|---|
| 2605 |
|
|---|
| 2606 | else /* MMX not supported: use modified C code - takes advantage
|
|---|
| 2607 | * of inlining of png_memcpy for a constant */
|
|---|
| 2608 | /* GRR 19991007: does it? or should pixel_bytes in each
|
|---|
| 2609 | * block be replaced with immediate value (e.g., 1)? */
|
|---|
| 2610 | /* GRR 19991017: replaced with constants in each case */
|
|---|
| 2611 | #endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|---|
| 2612 | {
|
|---|
| 2613 | if (pixel_bytes == 1)
|
|---|
| 2614 | {
|
|---|
| 2615 | for (i = width; i; i--)
|
|---|
| 2616 | {
|
|---|
| 2617 | int j;
|
|---|
| 2618 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 2619 | {
|
|---|
| 2620 | *dp-- = *sptr;
|
|---|
| 2621 | }
|
|---|
| 2622 | --sptr;
|
|---|
| 2623 | }
|
|---|
| 2624 | }
|
|---|
| 2625 | else if (pixel_bytes == 3)
|
|---|
| 2626 | {
|
|---|
| 2627 | for (i = width; i; i--)
|
|---|
| 2628 | {
|
|---|
| 2629 | png_byte v[8];
|
|---|
| 2630 | int j;
|
|---|
| 2631 | png_memcpy(v, sptr, 3);
|
|---|
| 2632 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 2633 | {
|
|---|
| 2634 | png_memcpy(dp, v, 3);
|
|---|
| 2635 | dp -= 3;
|
|---|
| 2636 | }
|
|---|
| 2637 | sptr -= 3;
|
|---|
| 2638 | }
|
|---|
| 2639 | }
|
|---|
| 2640 | else if (pixel_bytes == 2)
|
|---|
| 2641 | {
|
|---|
| 2642 | for (i = width; i; i--)
|
|---|
| 2643 | {
|
|---|
| 2644 | png_byte v[8];
|
|---|
| 2645 | int j;
|
|---|
| 2646 | png_memcpy(v, sptr, 2);
|
|---|
| 2647 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 2648 | {
|
|---|
| 2649 | png_memcpy(dp, v, 2);
|
|---|
| 2650 | dp -= 2;
|
|---|
| 2651 | }
|
|---|
| 2652 | sptr -= 2;
|
|---|
| 2653 | }
|
|---|
| 2654 | }
|
|---|
| 2655 | else if (pixel_bytes == 4)
|
|---|
| 2656 | {
|
|---|
| 2657 | for (i = width; i; i--)
|
|---|
| 2658 | {
|
|---|
| 2659 | png_byte v[8];
|
|---|
| 2660 | int j;
|
|---|
| 2661 | png_memcpy(v, sptr, 4);
|
|---|
| 2662 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 2663 | {
|
|---|
| 2664 | #ifdef PNG_DEBUG
|
|---|
| 2665 | if (dp < row || dp+3 > row+png_ptr->row_buf_size)
|
|---|
| 2666 | {
|
|---|
| 2667 | printf("dp out of bounds: row=%d, dp=%d, rp=%d\n",
|
|---|
| 2668 | row, dp, row+png_ptr->row_buf_size);
|
|---|
| 2669 | printf("row_buf=%d\n",png_ptr->row_buf_size);
|
|---|
| 2670 | }
|
|---|
| 2671 | #endif
|
|---|
| 2672 | png_memcpy(dp, v, 4);
|
|---|
| 2673 | dp -= 4;
|
|---|
| 2674 | }
|
|---|
| 2675 | sptr -= 4;
|
|---|
| 2676 | }
|
|---|
| 2677 | }
|
|---|
| 2678 | else if (pixel_bytes == 6)
|
|---|
| 2679 | {
|
|---|
| 2680 | for (i = width; i; i--)
|
|---|
| 2681 | {
|
|---|
| 2682 | png_byte v[8];
|
|---|
| 2683 | int j;
|
|---|
| 2684 | png_memcpy(v, sptr, 6);
|
|---|
| 2685 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 2686 | {
|
|---|
| 2687 | png_memcpy(dp, v, 6);
|
|---|
| 2688 | dp -= 6;
|
|---|
| 2689 | }
|
|---|
| 2690 | sptr -= 6;
|
|---|
| 2691 | }
|
|---|
| 2692 | }
|
|---|
| 2693 | else if (pixel_bytes == 8)
|
|---|
| 2694 | {
|
|---|
| 2695 | for (i = width; i; i--)
|
|---|
| 2696 | {
|
|---|
| 2697 | png_byte v[8];
|
|---|
| 2698 | int j;
|
|---|
| 2699 | png_memcpy(v, sptr, 8);
|
|---|
| 2700 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 2701 | {
|
|---|
| 2702 | png_memcpy(dp, v, 8);
|
|---|
| 2703 | dp -= 8;
|
|---|
| 2704 | }
|
|---|
| 2705 | sptr -= 8;
|
|---|
| 2706 | }
|
|---|
| 2707 | }
|
|---|
| 2708 | else /* GRR: should never be reached */
|
|---|
| 2709 | {
|
|---|
| 2710 | for (i = width; i; i--)
|
|---|
| 2711 | {
|
|---|
| 2712 | png_byte v[8];
|
|---|
| 2713 | int j;
|
|---|
| 2714 | png_memcpy(v, sptr, pixel_bytes);
|
|---|
| 2715 | for (j = 0; j < png_pass_inc[pass]; j++)
|
|---|
| 2716 | {
|
|---|
| 2717 | png_memcpy(dp, v, pixel_bytes);
|
|---|
| 2718 | dp -= pixel_bytes;
|
|---|
| 2719 | }
|
|---|
| 2720 | sptr -= pixel_bytes;
|
|---|
| 2721 | }
|
|---|
| 2722 | }
|
|---|
| 2723 |
|
|---|
| 2724 | } /* end if (MMX not supported) */
|
|---|
| 2725 | break;
|
|---|
| 2726 | }
|
|---|
| 2727 | } /* end switch (row_info->pixel_depth) */
|
|---|
| 2728 |
|
|---|
| 2729 | row_info->width = final_width;
|
|---|
| 2730 | row_info->rowbytes = ((final_width *
|
|---|
| 2731 | (png_uint_32)row_info->pixel_depth + 7) >> 3);
|
|---|
| 2732 | }
|
|---|
| 2733 |
|
|---|
| 2734 | } /* end png_do_read_interlace() */
|
|---|
| 2735 |
|
|---|
| 2736 | #endif /* PNG_HAVE_ASSEMBLER_READ_INTERLACE */
|
|---|
| 2737 | #endif /* PNG_READ_INTERLACING_SUPPORTED */
|
|---|
| 2738 |
|
|---|
| 2739 |
|
|---|
| 2740 |
|
|---|
| 2741 | #if defined(PNG_HAVE_ASSEMBLER_READ_FILTER_ROW)
|
|---|
| 2742 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
|
|---|
| 2743 |
|
|---|
| 2744 | // These variables are utilized in the functions below. They are declared
|
|---|
| 2745 | // globally here to ensure alignment on 8-byte boundaries.
|
|---|
| 2746 |
|
|---|
| 2747 | union uAll {
|
|---|
| 2748 | long long use;
|
|---|
| 2749 | double align;
|
|---|
| 2750 | } _LBCarryMask = {0x0101010101010101LL},
|
|---|
| 2751 | _HBClearMask = {0x7f7f7f7f7f7f7f7fLL},
|
|---|
| 2752 | _ActiveMask, _ActiveMask2, _ActiveMaskEnd, _ShiftBpp, _ShiftRem;
|
|---|
| 2753 |
|
|---|
| 2754 | #ifdef PNG_THREAD_UNSAFE_OK
|
|---|
| 2755 | //===========================================================================//
|
|---|
| 2756 | // //
|
|---|
| 2757 | // P N G _ R E A D _ F I L T E R _ R O W _ M M X _ A V G //
|
|---|
| 2758 | // //
|
|---|
| 2759 | //===========================================================================//
|
|---|
| 2760 |
|
|---|
| 2761 | // Optimized code for PNG Average filter decoder
|
|---|
| 2762 |
|
|---|
| 2763 | static void /* PRIVATE */
|
|---|
| 2764 | png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row,
|
|---|
| 2765 | png_bytep prev_row)
|
|---|
| 2766 | {
|
|---|
| 2767 | int bpp;
|
|---|
| 2768 | int dummy_value_c; // fix 'forbidden register 2 (cx) was spilled' error
|
|---|
| 2769 | int dummy_value_S;
|
|---|
| 2770 | int dummy_value_D;
|
|---|
| 2771 |
|
|---|
| 2772 | bpp = (row_info->pixel_depth + 7) >> 3; // get # bytes per pixel
|
|---|
| 2773 | _FullLength = row_info->rowbytes; // # of bytes to filter
|
|---|
| 2774 |
|
|---|
| 2775 | __asm__ __volatile__ (
|
|---|
| 2776 | // initialize address pointers and offset
|
|---|
| 2777 | #ifdef __PIC__
|
|---|
| 2778 | "pushl %%ebx \n\t" // save index to Global Offset Table
|
|---|
| 2779 | #endif
|
|---|
| 2780 | //pre "movl row, %%edi \n\t" // edi: Avg(x)
|
|---|
| 2781 | "xorl %%ebx, %%ebx \n\t" // ebx: x
|
|---|
| 2782 | "movl %%edi, %%edx \n\t"
|
|---|
| 2783 | //pre "movl prev_row, %%esi \n\t" // esi: Prior(x)
|
|---|
| 2784 | //pre "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx)
|
|---|
| 2785 | "subl %%ecx, %%edx \n\t" // edx: Raw(x-bpp)
|
|---|
| 2786 |
|
|---|
| 2787 | "xorl %%eax,%%eax \n\t"
|
|---|
| 2788 |
|
|---|
| 2789 | // Compute the Raw value for the first bpp bytes
|
|---|
| 2790 | // Raw(x) = Avg(x) + (Prior(x)/2)
|
|---|
| 2791 | "avg_rlp: \n\t"
|
|---|
| 2792 | "movb (%%esi,%%ebx,),%%al \n\t" // load al with Prior(x)
|
|---|
| 2793 | "incl %%ebx \n\t"
|
|---|
| 2794 | "shrb %%al \n\t" // divide by 2
|
|---|
| 2795 | "addb -1(%%edi,%%ebx,),%%al \n\t" // add Avg(x); -1 to offset inc ebx
|
|---|
| 2796 | //pre "cmpl bpp, %%ebx \n\t" // (bpp is preloaded into ecx)
|
|---|
| 2797 | "cmpl %%ecx, %%ebx \n\t"
|
|---|
| 2798 | "movb %%al,-1(%%edi,%%ebx,) \n\t" // write Raw(x); -1 to offset inc ebx
|
|---|
| 2799 | "jb avg_rlp \n\t" // mov does not affect flags
|
|---|
| 2800 |
|
|---|
| 2801 | // get # of bytes to alignment
|
|---|
| 2802 | "movl %%edi, _dif \n\t" // take start of row
|
|---|
| 2803 | "addl %%ebx, _dif \n\t" // add bpp
|
|---|
| 2804 | "addl $0xf, _dif \n\t" // add 7+8 to incr past alignment bdry
|
|---|
| 2805 | "andl $0xfffffff8, _dif \n\t" // mask to alignment boundary
|
|---|
| 2806 | "subl %%edi, _dif \n\t" // subtract from start => value ebx at
|
|---|
| 2807 | "jz avg_go \n\t" // alignment
|
|---|
| 2808 |
|
|---|
| 2809 | // fix alignment
|
|---|
| 2810 | // Compute the Raw value for the bytes up to the alignment boundary
|
|---|
| 2811 | // Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2)
|
|---|
| 2812 | "xorl %%ecx, %%ecx \n\t"
|
|---|
| 2813 |
|
|---|
| 2814 | "avg_lp1: \n\t"
|
|---|
| 2815 | "xorl %%eax, %%eax \n\t"
|
|---|
| 2816 | "movb (%%esi,%%ebx,), %%cl \n\t" // load cl with Prior(x)
|
|---|
| 2817 | "movb (%%edx,%%ebx,), %%al \n\t" // load al with Raw(x-bpp)
|
|---|
| 2818 | "addw %%cx, %%ax \n\t"
|
|---|
| 2819 | "incl %%ebx \n\t"
|
|---|
| 2820 | "shrw %%ax \n\t" // divide by 2
|
|---|
| 2821 | "addb -1(%%edi,%%ebx,), %%al \n\t" // add Avg(x); -1 to offset inc ebx
|
|---|
| 2822 | "cmpl _dif, %%ebx \n\t" // check if at alignment boundary
|
|---|
| 2823 | "movb %%al, -1(%%edi,%%ebx,) \n\t" // write Raw(x); -1 to offset inc ebx
|
|---|
| 2824 | "jb avg_lp1 \n\t" // repeat until at alignment boundary
|
|---|
| 2825 |
|
|---|
| 2826 | "avg_go: \n\t"
|
|---|
| 2827 | "movl _FullLength, %%eax \n\t"
|
|---|
| 2828 | "movl %%eax, %%ecx \n\t"
|
|---|
| 2829 | "subl %%ebx, %%eax \n\t" // subtract alignment fix
|
|---|
| 2830 | "andl $0x00000007, %%eax \n\t" // calc bytes over mult of 8
|
|---|
| 2831 | "subl %%eax, %%ecx \n\t" // drop over bytes from original length
|
|---|
| 2832 | "movl %%ecx, _MMXLength \n\t"
|
|---|
| 2833 | #ifdef __PIC__
|
|---|
| 2834 | "popl %%ebx \n\t" // restore index to Global Offset Table
|
|---|
| 2835 | #endif
|
|---|
| 2836 |
|
|---|
| 2837 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 2838 | "=S" (dummy_value_S),
|
|---|
| 2839 | "=D" (dummy_value_D)
|
|---|
| 2840 |
|
|---|
| 2841 | : "0" (bpp), // ecx // input regs
|
|---|
| 2842 | "1" (prev_row), // esi
|
|---|
| 2843 | "2" (row) // edi
|
|---|
| 2844 |
|
|---|
| 2845 | : "%eax", "%edx" // clobber list
|
|---|
| 2846 | #ifndef __PIC__
|
|---|
| 2847 | , "%ebx"
|
|---|
| 2848 | #endif
|
|---|
| 2849 | // GRR: INCLUDE "memory" as clobbered? (_dif, _MMXLength)
|
|---|
| 2850 | // (seems to work fine without...)
|
|---|
| 2851 | );
|
|---|
| 2852 |
|
|---|
| 2853 | // now do the math for the rest of the row
|
|---|
| 2854 | switch (bpp)
|
|---|
| 2855 | {
|
|---|
| 2856 | case 3:
|
|---|
| 2857 | {
|
|---|
| 2858 | _ActiveMask.use = 0x0000000000ffffffLL;
|
|---|
| 2859 | _ShiftBpp.use = 24; // == 3 * 8
|
|---|
| 2860 | _ShiftRem.use = 40; // == 64 - 24
|
|---|
| 2861 |
|
|---|
| 2862 | __asm__ __volatile__ (
|
|---|
| 2863 | // re-init address pointers and offset
|
|---|
| 2864 | "movq _ActiveMask, %%mm7 \n\t"
|
|---|
| 2865 | "movl _dif, %%ecx \n\t" // ecx: x = offset to
|
|---|
| 2866 | "movq _LBCarryMask, %%mm5 \n\t" // alignment boundary
|
|---|
| 2867 | // preload "movl row, %%edi \n\t" // edi: Avg(x)
|
|---|
| 2868 | "movq _HBClearMask, %%mm4 \n\t"
|
|---|
| 2869 | // preload "movl prev_row, %%esi \n\t" // esi: Prior(x)
|
|---|
| 2870 |
|
|---|
| 2871 | // prime the pump: load the first Raw(x-bpp) data set
|
|---|
| 2872 | "movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes
|
|---|
| 2873 | // (correct pos. in loop below)
|
|---|
| 2874 | "avg_3lp: \n\t"
|
|---|
| 2875 | "movq (%%edi,%%ecx,), %%mm0 \n\t" // load mm0 with Avg(x)
|
|---|
| 2876 | "movq %%mm5, %%mm3 \n\t"
|
|---|
| 2877 | "psrlq _ShiftRem, %%mm2 \n\t" // correct position Raw(x-bpp)
|
|---|
| 2878 | // data
|
|---|
| 2879 | "movq (%%esi,%%ecx,), %%mm1 \n\t" // load mm1 with Prior(x)
|
|---|
| 2880 | "movq %%mm7, %%mm6 \n\t"
|
|---|
| 2881 | "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte
|
|---|
| 2882 | "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2
|
|---|
| 2883 | "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each
|
|---|
| 2884 | // byte
|
|---|
| 2885 | "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for
|
|---|
| 2886 | // each byte
|
|---|
| 2887 | // add 1st active group (Raw(x-bpp)/2) to average with LBCarry
|
|---|
| 2888 | "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
|
|---|
| 2889 | // LBCarrys
|
|---|
| 2890 | "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
|
|---|
| 2891 | // where both
|
|---|
| 2892 | // lsb's were == 1 (only valid for active group)
|
|---|
| 2893 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|---|
| 2894 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|---|
| 2895 | // byte
|
|---|
| 2896 | "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
|
|---|
| 2897 | // for each byte
|
|---|
| 2898 | "pand %%mm6, %%mm2 \n\t" // leave only Active Group 1
|
|---|
| 2899 | // bytes to add to Avg
|
|---|
| 2900 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
|
|---|
| 2901 | // Avg for each Active
|
|---|
| 2902 | // byte
|
|---|
| 2903 | // add 2nd active group (Raw(x-bpp)/2) to average with _LBCarry
|
|---|
| 2904 | "psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover
|
|---|
| 2905 | // bytes 3-5
|
|---|
| 2906 | "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
|
|---|
| 2907 | "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly
|
|---|
| 2908 | "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
|
|---|
| 2909 | // LBCarrys
|
|---|
| 2910 | "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
|
|---|
| 2911 | // where both
|
|---|
| 2912 | // lsb's were == 1 (only valid for active group)
|
|---|
| 2913 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|---|
| 2914 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|---|
| 2915 | // byte
|
|---|
| 2916 | "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
|
|---|
| 2917 | // for each byte
|
|---|
| 2918 | "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2
|
|---|
| 2919 | // bytes to add to Avg
|
|---|
| 2920 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
|
|---|
| 2921 | // Avg for each Active
|
|---|
| 2922 | // byte
|
|---|
| 2923 |
|
|---|
| 2924 | // add 3rd active group (Raw(x-bpp)/2) to average with _LBCarry
|
|---|
| 2925 | "psllq _ShiftBpp, %%mm6 \n\t" // shift mm6 mask to cover last
|
|---|
| 2926 | // two
|
|---|
| 2927 | // bytes
|
|---|
| 2928 | "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
|
|---|
| 2929 | "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly
|
|---|
| 2930 | // Data only needs to be shifted once here to
|
|---|
| 2931 | // get the correct x-bpp offset.
|
|---|
| 2932 | "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
|
|---|
| 2933 | // LBCarrys
|
|---|
| 2934 | "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
|
|---|
| 2935 | // where both
|
|---|
| 2936 | // lsb's were == 1 (only valid for active group)
|
|---|
| 2937 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|---|
| 2938 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|---|
| 2939 | // byte
|
|---|
| 2940 | "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
|
|---|
| 2941 | // for each byte
|
|---|
| 2942 | "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2
|
|---|
| 2943 | // bytes to add to Avg
|
|---|
| 2944 | "addl $8, %%ecx \n\t"
|
|---|
| 2945 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
|
|---|
| 2946 | // Avg for each Active
|
|---|
| 2947 | // byte
|
|---|
| 2948 | // now ready to write back to memory
|
|---|
| 2949 | "movq %%mm0, -8(%%edi,%%ecx,) \n\t"
|
|---|
| 2950 | // move updated Raw(x) to use as Raw(x-bpp) for next loop
|
|---|
| 2951 | "cmpl _MMXLength, %%ecx \n\t"
|
|---|
| 2952 | "movq %%mm0, %%mm2 \n\t" // mov updated Raw(x) to mm2
|
|---|
| 2953 | "jb avg_3lp \n\t"
|
|---|
| 2954 |
|
|---|
| 2955 | : "=S" (dummy_value_S), // output regs (dummy)
|
|---|
| 2956 | "=D" (dummy_value_D)
|
|---|
| 2957 |
|
|---|
| 2958 | : "0" (prev_row), // esi // input regs
|
|---|
| 2959 | "1" (row) // edi
|
|---|
| 2960 |
|
|---|
| 2961 | : "%ecx" // clobber list
|
|---|
| 2962 | #if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 2963 | , "%mm0", "%mm1", "%mm2", "%mm3"
|
|---|
| 2964 | , "%mm4", "%mm5", "%mm6", "%mm7"
|
|---|
| 2965 | #endif
|
|---|
| 2966 | );
|
|---|
| 2967 | }
|
|---|
| 2968 | break; // end 3 bpp
|
|---|
| 2969 |
|
|---|
| 2970 | case 6:
|
|---|
| 2971 | case 4:
|
|---|
| 2972 | //case 7: // who wrote this? PNG doesn't support 5 or 7 bytes/pixel
|
|---|
| 2973 | //case 5: // GRR BOGUS
|
|---|
| 2974 | {
|
|---|
| 2975 | _ActiveMask.use = 0xffffffffffffffffLL; // use shift below to clear
|
|---|
| 2976 | // appropriate inactive bytes
|
|---|
| 2977 | _ShiftBpp.use = bpp << 3;
|
|---|
| 2978 | _ShiftRem.use = 64 - _ShiftBpp.use;
|
|---|
| 2979 |
|
|---|
| 2980 | __asm__ __volatile__ (
|
|---|
| 2981 | "movq _HBClearMask, %%mm4 \n\t"
|
|---|
| 2982 |
|
|---|
| 2983 | // re-init address pointers and offset
|
|---|
| 2984 | "movl _dif, %%ecx \n\t" // ecx: x = offset to
|
|---|
| 2985 | // alignment boundary
|
|---|
| 2986 |
|
|---|
| 2987 | // load _ActiveMask and clear all bytes except for 1st active group
|
|---|
| 2988 | "movq _ActiveMask, %%mm7 \n\t"
|
|---|
| 2989 | // preload "movl row, %%edi \n\t" // edi: Avg(x)
|
|---|
| 2990 | "psrlq _ShiftRem, %%mm7 \n\t"
|
|---|
| 2991 | // preload "movl prev_row, %%esi \n\t" // esi: Prior(x)
|
|---|
| 2992 | "movq %%mm7, %%mm6 \n\t"
|
|---|
| 2993 | "movq _LBCarryMask, %%mm5 \n\t"
|
|---|
| 2994 | "psllq _ShiftBpp, %%mm6 \n\t" // create mask for 2nd active
|
|---|
| 2995 | // group
|
|---|
| 2996 |
|
|---|
| 2997 | // prime the pump: load the first Raw(x-bpp) data set
|
|---|
| 2998 | "movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes
|
|---|
| 2999 | // (we correct pos. in loop below)
|
|---|
| 3000 | "avg_4lp: \n\t"
|
|---|
| 3001 | "movq (%%edi,%%ecx,), %%mm0 \n\t"
|
|---|
| 3002 | "psrlq _ShiftRem, %%mm2 \n\t" // shift data to pos. correctly
|
|---|
| 3003 | "movq (%%esi,%%ecx,), %%mm1 \n\t"
|
|---|
| 3004 | // add (Prev_row/2) to average
|
|---|
| 3005 | "movq %%mm5, %%mm3 \n\t"
|
|---|
| 3006 | "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte
|
|---|
| 3007 | "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2
|
|---|
| 3008 | "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each
|
|---|
| 3009 | // byte
|
|---|
| 3010 | "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for
|
|---|
| 3011 | // each byte
|
|---|
| 3012 | // add 1st active group (Raw(x-bpp)/2) to average with _LBCarry
|
|---|
| 3013 | "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
|
|---|
| 3014 | // LBCarrys
|
|---|
| 3015 | "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
|
|---|
| 3016 | // where both
|
|---|
| 3017 | // lsb's were == 1 (only valid for active group)
|
|---|
| 3018 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|---|
| 3019 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|---|
| 3020 | // byte
|
|---|
| 3021 | "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
|
|---|
| 3022 | // for each byte
|
|---|
| 3023 | "pand %%mm7, %%mm2 \n\t" // leave only Active Group 1
|
|---|
| 3024 | // bytes to add to Avg
|
|---|
| 3025 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to Avg
|
|---|
| 3026 | // for each Active
|
|---|
| 3027 | // byte
|
|---|
| 3028 | // add 2nd active group (Raw(x-bpp)/2) to average with _LBCarry
|
|---|
| 3029 | "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
|
|---|
| 3030 | "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly
|
|---|
| 3031 | "addl $8, %%ecx \n\t"
|
|---|
| 3032 | "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
|
|---|
| 3033 | // LBCarrys
|
|---|
| 3034 | "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
|
|---|
| 3035 | // where both
|
|---|
| 3036 | // lsb's were == 1 (only valid for active group)
|
|---|
| 3037 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|---|
| 3038 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|---|
| 3039 | // byte
|
|---|
| 3040 | "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
|
|---|
| 3041 | // for each byte
|
|---|
| 3042 | "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2
|
|---|
| 3043 | // bytes to add to Avg
|
|---|
| 3044 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
|
|---|
| 3045 | // Avg for each Active
|
|---|
| 3046 | // byte
|
|---|
| 3047 | "cmpl _MMXLength, %%ecx \n\t"
|
|---|
| 3048 | // now ready to write back to memory
|
|---|
| 3049 | "movq %%mm0, -8(%%edi,%%ecx,) \n\t"
|
|---|
| 3050 | // prep Raw(x-bpp) for next loop
|
|---|
| 3051 | "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
|
|---|
| 3052 | "jb avg_4lp \n\t"
|
|---|
| 3053 |
|
|---|
| 3054 | : "=S" (dummy_value_S), // output regs (dummy)
|
|---|
| 3055 | "=D" (dummy_value_D)
|
|---|
| 3056 |
|
|---|
| 3057 | : "0" (prev_row), // esi // input regs
|
|---|
| 3058 | "1" (row) // edi
|
|---|
| 3059 |
|
|---|
| 3060 | : "%ecx" // clobber list
|
|---|
| 3061 | #if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 3062 | , "%mm0", "%mm1", "%mm2", "%mm3"
|
|---|
| 3063 | , "%mm4", "%mm5", "%mm6", "%mm7"
|
|---|
| 3064 | #endif
|
|---|
| 3065 | );
|
|---|
| 3066 | }
|
|---|
| 3067 | break; // end 4,6 bpp
|
|---|
| 3068 |
|
|---|
| 3069 | case 2:
|
|---|
| 3070 | {
|
|---|
| 3071 | _ActiveMask.use = 0x000000000000ffffLL;
|
|---|
| 3072 | _ShiftBpp.use = 16; // == 2 * 8
|
|---|
| 3073 | _ShiftRem.use = 48; // == 64 - 16
|
|---|
| 3074 |
|
|---|
| 3075 | __asm__ __volatile__ (
|
|---|
| 3076 | // load _ActiveMask
|
|---|
| 3077 | "movq _ActiveMask, %%mm7 \n\t"
|
|---|
| 3078 | // re-init address pointers and offset
|
|---|
| 3079 | "movl _dif, %%ecx \n\t" // ecx: x = offset to alignment
|
|---|
| 3080 | // boundary
|
|---|
| 3081 | "movq _LBCarryMask, %%mm5 \n\t"
|
|---|
| 3082 | // preload "movl row, %%edi \n\t" // edi: Avg(x)
|
|---|
| 3083 | "movq _HBClearMask, %%mm4 \n\t"
|
|---|
| 3084 | // preload "movl prev_row, %%esi \n\t" // esi: Prior(x)
|
|---|
| 3085 |
|
|---|
| 3086 | // prime the pump: load the first Raw(x-bpp) data set
|
|---|
| 3087 | "movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes
|
|---|
| 3088 | // (we correct pos. in loop below)
|
|---|
| 3089 | "avg_2lp: \n\t"
|
|---|
| 3090 | "movq (%%edi,%%ecx,), %%mm0 \n\t"
|
|---|
| 3091 | "psrlq _ShiftRem, %%mm2 \n\t" // shift data to pos. correctly
|
|---|
| 3092 | "movq (%%esi,%%ecx,), %%mm1 \n\t" // (GRR BUGFIX: was psllq)
|
|---|
| 3093 | // add (Prev_row/2) to average
|
|---|
| 3094 | "movq %%mm5, %%mm3 \n\t"
|
|---|
| 3095 | "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte
|
|---|
| 3096 | "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2
|
|---|
| 3097 | "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each
|
|---|
| 3098 | // byte
|
|---|
| 3099 | "movq %%mm7, %%mm6 \n\t"
|
|---|
| 3100 | "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for
|
|---|
| 3101 | // each byte
|
|---|
| 3102 |
|
|---|
| 3103 | // add 1st active group (Raw(x-bpp)/2) to average with _LBCarry
|
|---|
| 3104 | "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
|
|---|
| 3105 | // LBCarrys
|
|---|
| 3106 | "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
|
|---|
| 3107 | // where both
|
|---|
| 3108 | // lsb's were == 1 (only valid
|
|---|
| 3109 | // for active group)
|
|---|
| 3110 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|---|
| 3111 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|---|
| 3112 | // byte
|
|---|
| 3113 | "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
|
|---|
| 3114 | // for each byte
|
|---|
| 3115 | "pand %%mm6, %%mm2 \n\t" // leave only Active Group 1
|
|---|
| 3116 | // bytes to add to Avg
|
|---|
| 3117 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to Avg
|
|---|
| 3118 | // for each Active byte
|
|---|
| 3119 |
|
|---|
| 3120 | // add 2nd active group (Raw(x-bpp)/2) to average with _LBCarry
|
|---|
| 3121 | "psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover
|
|---|
| 3122 | // bytes 2 & 3
|
|---|
| 3123 | "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
|
|---|
| 3124 | "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly
|
|---|
| 3125 | "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
|
|---|
| 3126 | // LBCarrys
|
|---|
| 3127 | "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
|
|---|
| 3128 | // where both
|
|---|
| 3129 | // lsb's were == 1 (only valid
|
|---|
| 3130 | // for active group)
|
|---|
| 3131 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|---|
| 3132 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|---|
| 3133 | // byte
|
|---|
| 3134 | "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
|
|---|
| 3135 | // for each byte
|
|---|
| 3136 | "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2
|
|---|
| 3137 | // bytes to add to Avg
|
|---|
| 3138 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
|
|---|
| 3139 | // Avg for each Active byte
|
|---|
| 3140 |
|
|---|
| 3141 | // add 3rd active group (Raw(x-bpp)/2) to average with _LBCarry
|
|---|
| 3142 | "psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover
|
|---|
| 3143 | // bytes 4 & 5
|
|---|
| 3144 | "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
|
|---|
| 3145 | "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly
|
|---|
| 3146 | "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
|
|---|
| 3147 | // LBCarrys
|
|---|
| 3148 | "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
|
|---|
| 3149 | // where both lsb's were == 1
|
|---|
| 3150 | // (only valid for active group)
|
|---|
| 3151 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|---|
| 3152 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|---|
| 3153 | // byte
|
|---|
| 3154 | "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
|
|---|
| 3155 | // for each byte
|
|---|
| 3156 | "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2
|
|---|
| 3157 | // bytes to add to Avg
|
|---|
| 3158 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
|
|---|
| 3159 | // Avg for each Active byte
|
|---|
| 3160 |
|
|---|
| 3161 | // add 4th active group (Raw(x-bpp)/2) to average with _LBCarry
|
|---|
| 3162 | "psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover
|
|---|
| 3163 | // bytes 6 & 7
|
|---|
| 3164 | "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
|
|---|
| 3165 | "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly
|
|---|
| 3166 | "addl $8, %%ecx \n\t"
|
|---|
| 3167 | "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting
|
|---|
| 3168 | // LBCarrys
|
|---|
| 3169 | "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte
|
|---|
| 3170 | // where both
|
|---|
| 3171 | // lsb's were == 1 (only valid
|
|---|
| 3172 | // for active group)
|
|---|
| 3173 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|---|
| 3174 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|---|
| 3175 | // byte
|
|---|
| 3176 | "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2)
|
|---|
| 3177 | // for each byte
|
|---|
| 3178 | "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2
|
|---|
| 3179 | // bytes to add to Avg
|
|---|
| 3180 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to
|
|---|
| 3181 | // Avg for each Active byte
|
|---|
| 3182 |
|
|---|
| 3183 | "cmpl _MMXLength, %%ecx \n\t"
|
|---|
| 3184 | // now ready to write back to memory
|
|---|
| 3185 | "movq %%mm0, -8(%%edi,%%ecx,) \n\t"
|
|---|
| 3186 | // prep Raw(x-bpp) for next loop
|
|---|
| 3187 | "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2
|
|---|
| 3188 | "jb avg_2lp \n\t"
|
|---|
| 3189 |
|
|---|
| 3190 | : "=S" (dummy_value_S), // output regs (dummy)
|
|---|
| 3191 | "=D" (dummy_value_D)
|
|---|
| 3192 |
|
|---|
| 3193 | : "0" (prev_row), // esi // input regs
|
|---|
| 3194 | "1" (row) // edi
|
|---|
| 3195 |
|
|---|
| 3196 | : "%ecx" // clobber list
|
|---|
| 3197 | #if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 3198 | , "%mm0", "%mm1", "%mm2", "%mm3"
|
|---|
| 3199 | , "%mm4", "%mm5", "%mm6", "%mm7"
|
|---|
| 3200 | #endif
|
|---|
| 3201 | );
|
|---|
| 3202 | }
|
|---|
| 3203 | break; // end 2 bpp
|
|---|
| 3204 |
|
|---|
| 3205 | case 1:
|
|---|
| 3206 | {
|
|---|
| 3207 | __asm__ __volatile__ (
|
|---|
| 3208 | // re-init address pointers and offset
|
|---|
| 3209 | #ifdef __PIC__
|
|---|
| 3210 | "pushl %%ebx \n\t" // save Global Offset Table index
|
|---|
| 3211 | #endif
|
|---|
| 3212 | "movl _dif, %%ebx \n\t" // ebx: x = offset to alignment
|
|---|
| 3213 | // boundary
|
|---|
| 3214 | // preload "movl row, %%edi \n\t" // edi: Avg(x)
|
|---|
| 3215 | "cmpl _FullLength, %%ebx \n\t" // test if offset at end of array
|
|---|
| 3216 | "jnb avg_1end \n\t"
|
|---|
| 3217 | // do Paeth decode for remaining bytes
|
|---|
| 3218 | // preload "movl prev_row, %%esi \n\t" // esi: Prior(x)
|
|---|
| 3219 | "movl %%edi, %%edx \n\t"
|
|---|
| 3220 | // preload "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx)
|
|---|
| 3221 | "subl %%ecx, %%edx \n\t" // edx: Raw(x-bpp)
|
|---|
| 3222 | "xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx
|
|---|
| 3223 | // in loop below
|
|---|
| 3224 | "avg_1lp: \n\t"
|
|---|
| 3225 | // Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2)
|
|---|
| 3226 | "xorl %%eax, %%eax \n\t"
|
|---|
| 3227 | "movb (%%esi,%%ebx,), %%cl \n\t" // load cl with Prior(x)
|
|---|
| 3228 | "movb (%%edx,%%ebx,), %%al \n\t" // load al with Raw(x-bpp)
|
|---|
| 3229 | "addw %%cx, %%ax \n\t"
|
|---|
| 3230 | "incl %%ebx \n\t"
|
|---|
| 3231 | "shrw %%ax \n\t" // divide by 2
|
|---|
| 3232 | "addb -1(%%edi,%%ebx,), %%al \n\t" // add Avg(x); -1 to offset
|
|---|
| 3233 | // inc ebx
|
|---|
| 3234 | "cmpl _FullLength, %%ebx \n\t" // check if at end of array
|
|---|
| 3235 | "movb %%al, -1(%%edi,%%ebx,) \n\t" // write back Raw(x);
|
|---|
| 3236 | // mov does not affect flags; -1 to offset inc ebx
|
|---|
| 3237 | "jb avg_1lp \n\t"
|
|---|
| 3238 |
|
|---|
| 3239 | "avg_1end: \n\t"
|
|---|
| 3240 | #ifdef __PIC__
|
|---|
| 3241 | "popl %%ebx \n\t" // Global Offset Table index
|
|---|
| 3242 | #endif
|
|---|
| 3243 |
|
|---|
| 3244 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 3245 | "=S" (dummy_value_S),
|
|---|
| 3246 | "=D" (dummy_value_D)
|
|---|
| 3247 |
|
|---|
| 3248 | : "0" (bpp), // ecx // input regs
|
|---|
| 3249 | "1" (prev_row), // esi
|
|---|
| 3250 | "2" (row) // edi
|
|---|
| 3251 |
|
|---|
| 3252 | : "%eax", "%edx" // clobber list
|
|---|
| 3253 | #ifndef __PIC__
|
|---|
| 3254 | , "%ebx"
|
|---|
| 3255 | #endif
|
|---|
| 3256 | );
|
|---|
| 3257 | }
|
|---|
| 3258 | return; // end 1 bpp
|
|---|
| 3259 |
|
|---|
| 3260 | case 8:
|
|---|
| 3261 | {
|
|---|
| 3262 | __asm__ __volatile__ (
|
|---|
| 3263 | // re-init address pointers and offset
|
|---|
| 3264 | "movl _dif, %%ecx \n\t" // ecx: x == offset to alignment
|
|---|
| 3265 | "movq _LBCarryMask, %%mm5 \n\t" // boundary
|
|---|
| 3266 | // preload "movl row, %%edi \n\t" // edi: Avg(x)
|
|---|
| 3267 | "movq _HBClearMask, %%mm4 \n\t"
|
|---|
| 3268 | // preload "movl prev_row, %%esi \n\t" // esi: Prior(x)
|
|---|
| 3269 |
|
|---|
| 3270 | // prime the pump: load the first Raw(x-bpp) data set
|
|---|
| 3271 | "movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes
|
|---|
| 3272 | // (NO NEED to correct pos. in loop below)
|
|---|
| 3273 |
|
|---|
| 3274 | "avg_8lp: \n\t"
|
|---|
| 3275 | "movq (%%edi,%%ecx,), %%mm0 \n\t"
|
|---|
| 3276 | "movq %%mm5, %%mm3 \n\t"
|
|---|
| 3277 | "movq (%%esi,%%ecx,), %%mm1 \n\t"
|
|---|
| 3278 | "addl $8, %%ecx \n\t"
|
|---|
| 3279 | "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte
|
|---|
| 3280 | "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2
|
|---|
| 3281 | "pand %%mm2, %%mm3 \n\t" // get LBCarrys for each byte
|
|---|
| 3282 | // where both lsb's were == 1
|
|---|
| 3283 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|---|
| 3284 | "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7, each byte
|
|---|
| 3285 | "paddb %%mm3, %%mm0 \n\t" // add LBCarrys to Avg, each byte
|
|---|
| 3286 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7, each byte
|
|---|
| 3287 | "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg, each
|
|---|
| 3288 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) to Avg for each
|
|---|
| 3289 | "cmpl _MMXLength, %%ecx \n\t"
|
|---|
| 3290 | "movq %%mm0, -8(%%edi,%%ecx,) \n\t"
|
|---|
| 3291 | "movq %%mm0, %%mm2 \n\t" // reuse as Raw(x-bpp)
|
|---|
| 3292 | "jb avg_8lp \n\t"
|
|---|
| 3293 |
|
|---|
| 3294 | : "=S" (dummy_value_S), // output regs (dummy)
|
|---|
| 3295 | "=D" (dummy_value_D)
|
|---|
| 3296 |
|
|---|
| 3297 | : "0" (prev_row), // esi // input regs
|
|---|
| 3298 | "1" (row) // edi
|
|---|
| 3299 |
|
|---|
| 3300 | : "%ecx" // clobber list
|
|---|
| 3301 | #if 0 /* %mm0, ..., %mm5 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 3302 | , "%mm0", "%mm1", "%mm2"
|
|---|
| 3303 | , "%mm3", "%mm4", "%mm5"
|
|---|
| 3304 | #endif
|
|---|
| 3305 | );
|
|---|
| 3306 | }
|
|---|
| 3307 | break; // end 8 bpp
|
|---|
| 3308 |
|
|---|
| 3309 | default: // bpp greater than 8 (!= 1,2,3,4,[5],6,[7],8)
|
|---|
| 3310 | {
|
|---|
| 3311 |
|
|---|
| 3312 | #ifdef PNG_DEBUG
|
|---|
| 3313 | // GRR: PRINT ERROR HERE: SHOULD NEVER BE REACHED
|
|---|
| 3314 | png_debug(1,
|
|---|
| 3315 | "Internal logic error in pnggccrd (png_read_filter_row_mmx_avg())\n");
|
|---|
| 3316 | #endif
|
|---|
| 3317 |
|
|---|
| 3318 | #if 0
|
|---|
| 3319 | __asm__ __volatile__ (
|
|---|
| 3320 | "movq _LBCarryMask, %%mm5 \n\t"
|
|---|
| 3321 | // re-init address pointers and offset
|
|---|
| 3322 | "movl _dif, %%ebx \n\t" // ebx: x = offset to
|
|---|
| 3323 | // alignment boundary
|
|---|
| 3324 | "movl row, %%edi \n\t" // edi: Avg(x)
|
|---|
| 3325 | "movq _HBClearMask, %%mm4 \n\t"
|
|---|
| 3326 | "movl %%edi, %%edx \n\t"
|
|---|
| 3327 | "movl prev_row, %%esi \n\t" // esi: Prior(x)
|
|---|
| 3328 | "subl bpp, %%edx \n\t" // edx: Raw(x-bpp)
|
|---|
| 3329 | "avg_Alp: \n\t"
|
|---|
| 3330 | "movq (%%edi,%%ebx,), %%mm0 \n\t"
|
|---|
| 3331 | "movq %%mm5, %%mm3 \n\t"
|
|---|
| 3332 | "movq (%%esi,%%ebx,), %%mm1 \n\t"
|
|---|
| 3333 | "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte
|
|---|
| 3334 | "movq (%%edx,%%ebx,), %%mm2 \n\t"
|
|---|
| 3335 | "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2
|
|---|
| 3336 | "pand %%mm2, %%mm3 \n\t" // get LBCarrys for each byte
|
|---|
| 3337 | // where both lsb's were == 1
|
|---|
| 3338 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2
|
|---|
| 3339 | "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each
|
|---|
| 3340 | // byte
|
|---|
| 3341 | "paddb %%mm3, %%mm0 \n\t" // add LBCarrys to Avg for each
|
|---|
| 3342 | // byte
|
|---|
| 3343 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each
|
|---|
| 3344 | // byte
|
|---|
| 3345 | "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for
|
|---|
| 3346 | // each byte
|
|---|
| 3347 | "addl $8, %%ebx \n\t"
|
|---|
| 3348 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) to Avg for each
|
|---|
| 3349 | // byte
|
|---|
| 3350 | "cmpl _MMXLength, %%ebx \n\t"
|
|---|
| 3351 | "movq %%mm0, -8(%%edi,%%ebx,) \n\t"
|
|---|
| 3352 | "jb avg_Alp \n\t"
|
|---|
| 3353 |
|
|---|
| 3354 | : // FIXASM: output regs/vars go here, e.g.: "=m" (memory_var)
|
|---|
| 3355 |
|
|---|
| 3356 | : // FIXASM: input regs, e.g.: "c" (count), "S" (src), "D" (dest)
|
|---|
| 3357 |
|
|---|
| 3358 | : "%ebx", "%edx", "%edi", "%esi" // CHECKASM: clobber list
|
|---|
| 3359 | );
|
|---|
| 3360 | #endif /* 0 - NEVER REACHED */
|
|---|
| 3361 | }
|
|---|
| 3362 | break;
|
|---|
| 3363 |
|
|---|
| 3364 | } // end switch (bpp)
|
|---|
| 3365 |
|
|---|
| 3366 | __asm__ __volatile__ (
|
|---|
| 3367 | // MMX acceleration complete; now do clean-up
|
|---|
| 3368 | // check if any remaining bytes left to decode
|
|---|
| 3369 | #ifdef __PIC__
|
|---|
| 3370 | "pushl %%ebx \n\t" // save index to Global Offset Table
|
|---|
| 3371 | #endif
|
|---|
| 3372 | "movl _MMXLength, %%ebx \n\t" // ebx: x == offset bytes after MMX
|
|---|
| 3373 | //pre "movl row, %%edi \n\t" // edi: Avg(x)
|
|---|
| 3374 | "cmpl _FullLength, %%ebx \n\t" // test if offset at end of array
|
|---|
| 3375 | "jnb avg_end \n\t"
|
|---|
| 3376 |
|
|---|
| 3377 | // do Avg decode for remaining bytes
|
|---|
| 3378 | //pre "movl prev_row, %%esi \n\t" // esi: Prior(x)
|
|---|
| 3379 | "movl %%edi, %%edx \n\t"
|
|---|
| 3380 | //pre "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx)
|
|---|
| 3381 | "subl %%ecx, %%edx \n\t" // edx: Raw(x-bpp)
|
|---|
| 3382 | "xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx below
|
|---|
| 3383 |
|
|---|
| 3384 | "avg_lp2: \n\t"
|
|---|
| 3385 | // Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2)
|
|---|
| 3386 | "xorl %%eax, %%eax \n\t"
|
|---|
| 3387 | "movb (%%esi,%%ebx,), %%cl \n\t" // load cl with Prior(x)
|
|---|
| 3388 | "movb (%%edx,%%ebx,), %%al \n\t" // load al with Raw(x-bpp)
|
|---|
| 3389 | "addw %%cx, %%ax \n\t"
|
|---|
| 3390 | "incl %%ebx \n\t"
|
|---|
| 3391 | "shrw %%ax \n\t" // divide by 2
|
|---|
| 3392 | "addb -1(%%edi,%%ebx,), %%al \n\t" // add Avg(x); -1 to offset inc ebx
|
|---|
| 3393 | "cmpl _FullLength, %%ebx \n\t" // check if at end of array
|
|---|
| 3394 | "movb %%al, -1(%%edi,%%ebx,) \n\t" // write back Raw(x) [mov does not
|
|---|
| 3395 | "jb avg_lp2 \n\t" // affect flags; -1 to offset inc ebx]
|
|---|
| 3396 |
|
|---|
| 3397 | "avg_end: \n\t"
|
|---|
| 3398 | "EMMS \n\t" // end MMX; prep for poss. FP instrs.
|
|---|
| 3399 | #ifdef __PIC__
|
|---|
| 3400 | "popl %%ebx \n\t" // restore index to Global Offset Table
|
|---|
| 3401 | #endif
|
|---|
| 3402 |
|
|---|
| 3403 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 3404 | "=S" (dummy_value_S),
|
|---|
| 3405 | "=D" (dummy_value_D)
|
|---|
| 3406 |
|
|---|
| 3407 | : "0" (bpp), // ecx // input regs
|
|---|
| 3408 | "1" (prev_row), // esi
|
|---|
| 3409 | "2" (row) // edi
|
|---|
| 3410 |
|
|---|
| 3411 | : "%eax", "%edx" // clobber list
|
|---|
| 3412 | #ifndef __PIC__
|
|---|
| 3413 | , "%ebx"
|
|---|
| 3414 | #endif
|
|---|
| 3415 | );
|
|---|
| 3416 |
|
|---|
| 3417 | } /* end png_read_filter_row_mmx_avg() */
|
|---|
| 3418 | #endif
|
|---|
| 3419 |
|
|---|
| 3420 |
|
|---|
| 3421 |
|
|---|
| 3422 | #ifdef PNG_THREAD_UNSAFE_OK
|
|---|
| 3423 | //===========================================================================//
|
|---|
| 3424 | // //
|
|---|
| 3425 | // P N G _ R E A D _ F I L T E R _ R O W _ M M X _ P A E T H //
|
|---|
| 3426 | // //
|
|---|
| 3427 | //===========================================================================//
|
|---|
| 3428 |
|
|---|
| 3429 | // Optimized code for PNG Paeth filter decoder
|
|---|
| 3430 |
|
|---|
| 3431 | static void /* PRIVATE */
|
|---|
| 3432 | png_read_filter_row_mmx_paeth(png_row_infop row_info, png_bytep row,
|
|---|
| 3433 | png_bytep prev_row)
|
|---|
| 3434 | {
|
|---|
| 3435 | int bpp;
|
|---|
| 3436 | int dummy_value_c; // fix 'forbidden register 2 (cx) was spilled' error
|
|---|
| 3437 | int dummy_value_S;
|
|---|
| 3438 | int dummy_value_D;
|
|---|
| 3439 |
|
|---|
| 3440 | bpp = (row_info->pixel_depth + 7) >> 3; // Get # bytes per pixel
|
|---|
| 3441 | _FullLength = row_info->rowbytes; // # of bytes to filter
|
|---|
| 3442 |
|
|---|
| 3443 | __asm__ __volatile__ (
|
|---|
| 3444 | #ifdef __PIC__
|
|---|
| 3445 | "pushl %%ebx \n\t" // save index to Global Offset Table
|
|---|
| 3446 | #endif
|
|---|
| 3447 | "xorl %%ebx, %%ebx \n\t" // ebx: x offset
|
|---|
| 3448 | //pre "movl row, %%edi \n\t"
|
|---|
| 3449 | "xorl %%edx, %%edx \n\t" // edx: x-bpp offset
|
|---|
| 3450 | //pre "movl prev_row, %%esi \n\t"
|
|---|
| 3451 | "xorl %%eax, %%eax \n\t"
|
|---|
| 3452 |
|
|---|
| 3453 | // Compute the Raw value for the first bpp bytes
|
|---|
| 3454 | // Note: the formula works out to be always
|
|---|
| 3455 | // Paeth(x) = Raw(x) + Prior(x) where x < bpp
|
|---|
| 3456 | "paeth_rlp: \n\t"
|
|---|
| 3457 | "movb (%%edi,%%ebx,), %%al \n\t"
|
|---|
| 3458 | "addb (%%esi,%%ebx,), %%al \n\t"
|
|---|
| 3459 | "incl %%ebx \n\t"
|
|---|
| 3460 | //pre "cmpl bpp, %%ebx \n\t" (bpp is preloaded into ecx)
|
|---|
| 3461 | "cmpl %%ecx, %%ebx \n\t"
|
|---|
| 3462 | "movb %%al, -1(%%edi,%%ebx,) \n\t"
|
|---|
| 3463 | "jb paeth_rlp \n\t"
|
|---|
| 3464 | // get # of bytes to alignment
|
|---|
| 3465 | "movl %%edi, _dif \n\t" // take start of row
|
|---|
| 3466 | "addl %%ebx, _dif \n\t" // add bpp
|
|---|
| 3467 | "xorl %%ecx, %%ecx \n\t"
|
|---|
| 3468 | "addl $0xf, _dif \n\t" // add 7 + 8 to incr past alignment
|
|---|
| 3469 | // boundary
|
|---|
| 3470 | "andl $0xfffffff8, _dif \n\t" // mask to alignment boundary
|
|---|
| 3471 | "subl %%edi, _dif \n\t" // subtract from start ==> value ebx
|
|---|
| 3472 | // at alignment
|
|---|
| 3473 | "jz paeth_go \n\t"
|
|---|
| 3474 | // fix alignment
|
|---|
| 3475 |
|
|---|
| 3476 | "paeth_lp1: \n\t"
|
|---|
| 3477 | "xorl %%eax, %%eax \n\t"
|
|---|
| 3478 | // pav = p - a = (a + b - c) - a = b - c
|
|---|
| 3479 | "movb (%%esi,%%ebx,), %%al \n\t" // load Prior(x) into al
|
|---|
| 3480 | "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
|
|---|
| 3481 | "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp)
|
|---|
| 3482 | "movl %%eax, _patemp \n\t" // Save pav for later use
|
|---|
| 3483 | "xorl %%eax, %%eax \n\t"
|
|---|
| 3484 | // pbv = p - b = (a + b - c) - b = a - c
|
|---|
| 3485 | "movb (%%edi,%%edx,), %%al \n\t" // load Raw(x-bpp) into al
|
|---|
| 3486 | "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp)
|
|---|
| 3487 | "movl %%eax, %%ecx \n\t"
|
|---|
| 3488 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|---|
| 3489 | "addl _patemp, %%eax \n\t" // pcv = pav + pbv
|
|---|
| 3490 | // pc = abs(pcv)
|
|---|
| 3491 | "testl $0x80000000, %%eax \n\t"
|
|---|
| 3492 | "jz paeth_pca \n\t"
|
|---|
| 3493 | "negl %%eax \n\t" // reverse sign of neg values
|
|---|
| 3494 |
|
|---|
| 3495 | "paeth_pca: \n\t"
|
|---|
| 3496 | "movl %%eax, _pctemp \n\t" // save pc for later use
|
|---|
| 3497 | // pb = abs(pbv)
|
|---|
| 3498 | "testl $0x80000000, %%ecx \n\t"
|
|---|
| 3499 | "jz paeth_pba \n\t"
|
|---|
| 3500 | "negl %%ecx \n\t" // reverse sign of neg values
|
|---|
| 3501 |
|
|---|
| 3502 | "paeth_pba: \n\t"
|
|---|
| 3503 | "movl %%ecx, _pbtemp \n\t" // save pb for later use
|
|---|
| 3504 | // pa = abs(pav)
|
|---|
| 3505 | "movl _patemp, %%eax \n\t"
|
|---|
| 3506 | "testl $0x80000000, %%eax \n\t"
|
|---|
| 3507 | "jz paeth_paa \n\t"
|
|---|
| 3508 | "negl %%eax \n\t" // reverse sign of neg values
|
|---|
| 3509 |
|
|---|
| 3510 | "paeth_paa: \n\t"
|
|---|
| 3511 | "movl %%eax, _patemp \n\t" // save pa for later use
|
|---|
| 3512 | // test if pa <= pb
|
|---|
| 3513 | "cmpl %%ecx, %%eax \n\t"
|
|---|
| 3514 | "jna paeth_abb \n\t"
|
|---|
| 3515 | // pa > pb; now test if pb <= pc
|
|---|
| 3516 | "cmpl _pctemp, %%ecx \n\t"
|
|---|
| 3517 | "jna paeth_bbc \n\t"
|
|---|
| 3518 | // pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp)
|
|---|
| 3519 | "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
|
|---|
| 3520 | "jmp paeth_paeth \n\t"
|
|---|
| 3521 |
|
|---|
| 3522 | "paeth_bbc: \n\t"
|
|---|
| 3523 | // pb <= pc; Raw(x) = Paeth(x) + Prior(x)
|
|---|
| 3524 | "movb (%%esi,%%ebx,), %%cl \n\t" // load Prior(x) into cl
|
|---|
| 3525 | "jmp paeth_paeth \n\t"
|
|---|
| 3526 |
|
|---|
| 3527 | "paeth_abb: \n\t"
|
|---|
| 3528 | // pa <= pb; now test if pa <= pc
|
|---|
| 3529 | "cmpl _pctemp, %%eax \n\t"
|
|---|
| 3530 | "jna paeth_abc \n\t"
|
|---|
| 3531 | // pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp)
|
|---|
| 3532 | "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
|
|---|
| 3533 | "jmp paeth_paeth \n\t"
|
|---|
| 3534 |
|
|---|
| 3535 | "paeth_abc: \n\t"
|
|---|
| 3536 | // pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp)
|
|---|
| 3537 | "movb (%%edi,%%edx,), %%cl \n\t" // load Raw(x-bpp) into cl
|
|---|
| 3538 |
|
|---|
| 3539 | "paeth_paeth: \n\t"
|
|---|
| 3540 | "incl %%ebx \n\t"
|
|---|
| 3541 | "incl %%edx \n\t"
|
|---|
| 3542 | // Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256
|
|---|
| 3543 | "addb %%cl, -1(%%edi,%%ebx,) \n\t"
|
|---|
| 3544 | "cmpl _dif, %%ebx \n\t"
|
|---|
| 3545 | "jb paeth_lp1 \n\t"
|
|---|
| 3546 |
|
|---|
| 3547 | "paeth_go: \n\t"
|
|---|
| 3548 | "movl _FullLength, %%ecx \n\t"
|
|---|
| 3549 | "movl %%ecx, %%eax \n\t"
|
|---|
| 3550 | "subl %%ebx, %%eax \n\t" // subtract alignment fix
|
|---|
| 3551 | "andl $0x00000007, %%eax \n\t" // calc bytes over mult of 8
|
|---|
| 3552 | "subl %%eax, %%ecx \n\t" // drop over bytes from original length
|
|---|
| 3553 | "movl %%ecx, _MMXLength \n\t"
|
|---|
| 3554 | #ifdef __PIC__
|
|---|
| 3555 | "popl %%ebx \n\t" // restore index to Global Offset Table
|
|---|
| 3556 | #endif
|
|---|
| 3557 |
|
|---|
| 3558 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 3559 | "=S" (dummy_value_S),
|
|---|
| 3560 | "=D" (dummy_value_D)
|
|---|
| 3561 |
|
|---|
| 3562 | : "0" (bpp), // ecx // input regs
|
|---|
| 3563 | "1" (prev_row), // esi
|
|---|
| 3564 | "2" (row) // edi
|
|---|
| 3565 |
|
|---|
| 3566 | : "%eax", "%edx" // clobber list
|
|---|
| 3567 | #ifndef __PIC__
|
|---|
| 3568 | , "%ebx"
|
|---|
| 3569 | #endif
|
|---|
| 3570 | );
|
|---|
| 3571 |
|
|---|
| 3572 | // now do the math for the rest of the row
|
|---|
| 3573 | switch (bpp)
|
|---|
| 3574 | {
|
|---|
| 3575 | case 3:
|
|---|
| 3576 | {
|
|---|
| 3577 | _ActiveMask.use = 0x0000000000ffffffLL;
|
|---|
| 3578 | _ActiveMaskEnd.use = 0xffff000000000000LL;
|
|---|
| 3579 | _ShiftBpp.use = 24; // == bpp(3) * 8
|
|---|
| 3580 | _ShiftRem.use = 40; // == 64 - 24
|
|---|
| 3581 |
|
|---|
| 3582 | __asm__ __volatile__ (
|
|---|
| 3583 | "movl _dif, %%ecx \n\t"
|
|---|
| 3584 | // preload "movl row, %%edi \n\t"
|
|---|
| 3585 | // preload "movl prev_row, %%esi \n\t"
|
|---|
| 3586 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 3587 | // prime the pump: load the first Raw(x-bpp) data set
|
|---|
| 3588 | "movq -8(%%edi,%%ecx,), %%mm1 \n\t"
|
|---|
| 3589 | "paeth_3lp: \n\t"
|
|---|
| 3590 | "psrlq _ShiftRem, %%mm1 \n\t" // shift last 3 bytes to 1st
|
|---|
| 3591 | // 3 bytes
|
|---|
| 3592 | "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x)
|
|---|
| 3593 | "punpcklbw %%mm0, %%mm1 \n\t" // unpack High bytes of a
|
|---|
| 3594 | "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // prep c=Prior(x-bpp) bytes
|
|---|
| 3595 | "punpcklbw %%mm0, %%mm2 \n\t" // unpack High bytes of b
|
|---|
| 3596 | "psrlq _ShiftRem, %%mm3 \n\t" // shift last 3 bytes to 1st
|
|---|
| 3597 | // 3 bytes
|
|---|
| 3598 | // pav = p - a = (a + b - c) - a = b - c
|
|---|
| 3599 | "movq %%mm2, %%mm4 \n\t"
|
|---|
| 3600 | "punpcklbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
|
|---|
| 3601 | // pbv = p - b = (a + b - c) - b = a - c
|
|---|
| 3602 | "movq %%mm1, %%mm5 \n\t"
|
|---|
| 3603 | "psubw %%mm3, %%mm4 \n\t"
|
|---|
| 3604 | "pxor %%mm7, %%mm7 \n\t"
|
|---|
| 3605 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|---|
| 3606 | "movq %%mm4, %%mm6 \n\t"
|
|---|
| 3607 | "psubw %%mm3, %%mm5 \n\t"
|
|---|
| 3608 |
|
|---|
| 3609 | // pa = abs(p-a) = abs(pav)
|
|---|
| 3610 | // pb = abs(p-b) = abs(pbv)
|
|---|
| 3611 | // pc = abs(p-c) = abs(pcv)
|
|---|
| 3612 | "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
|
|---|
| 3613 | "paddw %%mm5, %%mm6 \n\t"
|
|---|
| 3614 | "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|---|
| 3615 | "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
|
|---|
| 3616 | "psubw %%mm0, %%mm4 \n\t"
|
|---|
| 3617 | "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
|
|---|
| 3618 | "psubw %%mm0, %%mm4 \n\t"
|
|---|
| 3619 | "psubw %%mm7, %%mm5 \n\t"
|
|---|
| 3620 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 3621 | "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
|
|---|
| 3622 | "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|---|
| 3623 | "psubw %%mm7, %%mm5 \n\t"
|
|---|
| 3624 | "psubw %%mm0, %%mm6 \n\t"
|
|---|
| 3625 | // test pa <= pb
|
|---|
| 3626 | "movq %%mm4, %%mm7 \n\t"
|
|---|
| 3627 | "psubw %%mm0, %%mm6 \n\t"
|
|---|
| 3628 | "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
|
|---|
| 3629 | "movq %%mm7, %%mm0 \n\t"
|
|---|
| 3630 | // use mm7 mask to merge pa & pb
|
|---|
| 3631 | "pand %%mm7, %%mm5 \n\t"
|
|---|
| 3632 | // use mm0 mask copy to merge a & b
|
|---|
| 3633 | "pand %%mm0, %%mm2 \n\t"
|
|---|
| 3634 | "pandn %%mm4, %%mm7 \n\t"
|
|---|
| 3635 | "pandn %%mm1, %%mm0 \n\t"
|
|---|
| 3636 | "paddw %%mm5, %%mm7 \n\t"
|
|---|
| 3637 | "paddw %%mm2, %%mm0 \n\t"
|
|---|
| 3638 | // test ((pa <= pb)? pa:pb) <= pc
|
|---|
| 3639 | "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
|
|---|
| 3640 | "pxor %%mm1, %%mm1 \n\t"
|
|---|
| 3641 | "pand %%mm7, %%mm3 \n\t"
|
|---|
| 3642 | "pandn %%mm0, %%mm7 \n\t"
|
|---|
| 3643 | "paddw %%mm3, %%mm7 \n\t"
|
|---|
| 3644 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 3645 | "packuswb %%mm1, %%mm7 \n\t"
|
|---|
| 3646 | "movq (%%esi,%%ecx,), %%mm3 \n\t" // load c=Prior(x-bpp)
|
|---|
| 3647 | "pand _ActiveMask, %%mm7 \n\t"
|
|---|
| 3648 | "movq %%mm3, %%mm2 \n\t" // load b=Prior(x) step 1
|
|---|
| 3649 | "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x)
|
|---|
| 3650 | "punpcklbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
|
|---|
| 3651 | "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value
|
|---|
| 3652 | "movq %%mm7, %%mm1 \n\t" // now mm1 will be used as
|
|---|
| 3653 | // Raw(x-bpp)
|
|---|
| 3654 | // now do Paeth for 2nd set of bytes (3-5)
|
|---|
| 3655 | "psrlq _ShiftBpp, %%mm2 \n\t" // load b=Prior(x) step 2
|
|---|
| 3656 | "punpcklbw %%mm0, %%mm1 \n\t" // unpack High bytes of a
|
|---|
| 3657 | "pxor %%mm7, %%mm7 \n\t"
|
|---|
| 3658 | "punpcklbw %%mm0, %%mm2 \n\t" // unpack High bytes of b
|
|---|
| 3659 | // pbv = p - b = (a + b - c) - b = a - c
|
|---|
| 3660 | "movq %%mm1, %%mm5 \n\t"
|
|---|
| 3661 | // pav = p - a = (a + b - c) - a = b - c
|
|---|
| 3662 | "movq %%mm2, %%mm4 \n\t"
|
|---|
| 3663 | "psubw %%mm3, %%mm5 \n\t"
|
|---|
| 3664 | "psubw %%mm3, %%mm4 \n\t"
|
|---|
| 3665 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) =
|
|---|
| 3666 | // pav + pbv = pbv + pav
|
|---|
| 3667 | "movq %%mm5, %%mm6 \n\t"
|
|---|
| 3668 | "paddw %%mm4, %%mm6 \n\t"
|
|---|
| 3669 |
|
|---|
| 3670 | // pa = abs(p-a) = abs(pav)
|
|---|
| 3671 | // pb = abs(p-b) = abs(pbv)
|
|---|
| 3672 | // pc = abs(p-c) = abs(pcv)
|
|---|
| 3673 | "pcmpgtw %%mm5, %%mm0 \n\t" // create mask pbv bytes < 0
|
|---|
| 3674 | "pcmpgtw %%mm4, %%mm7 \n\t" // create mask pav bytes < 0
|
|---|
| 3675 | "pand %%mm5, %%mm0 \n\t" // only pbv bytes < 0 in mm0
|
|---|
| 3676 | "pand %%mm4, %%mm7 \n\t" // only pav bytes < 0 in mm7
|
|---|
| 3677 | "psubw %%mm0, %%mm5 \n\t"
|
|---|
| 3678 | "psubw %%mm7, %%mm4 \n\t"
|
|---|
| 3679 | "psubw %%mm0, %%mm5 \n\t"
|
|---|
| 3680 | "psubw %%mm7, %%mm4 \n\t"
|
|---|
| 3681 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 3682 | "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
|
|---|
| 3683 | "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|---|
| 3684 | "psubw %%mm0, %%mm6 \n\t"
|
|---|
| 3685 | // test pa <= pb
|
|---|
| 3686 | "movq %%mm4, %%mm7 \n\t"
|
|---|
| 3687 | "psubw %%mm0, %%mm6 \n\t"
|
|---|
| 3688 | "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
|
|---|
| 3689 | "movq %%mm7, %%mm0 \n\t"
|
|---|
| 3690 | // use mm7 mask to merge pa & pb
|
|---|
| 3691 | "pand %%mm7, %%mm5 \n\t"
|
|---|
| 3692 | // use mm0 mask copy to merge a & b
|
|---|
| 3693 | "pand %%mm0, %%mm2 \n\t"
|
|---|
| 3694 | "pandn %%mm4, %%mm7 \n\t"
|
|---|
| 3695 | "pandn %%mm1, %%mm0 \n\t"
|
|---|
| 3696 | "paddw %%mm5, %%mm7 \n\t"
|
|---|
| 3697 | "paddw %%mm2, %%mm0 \n\t"
|
|---|
| 3698 | // test ((pa <= pb)? pa:pb) <= pc
|
|---|
| 3699 | "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
|
|---|
| 3700 | "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x)
|
|---|
| 3701 | "pand %%mm7, %%mm3 \n\t"
|
|---|
| 3702 | "pandn %%mm0, %%mm7 \n\t"
|
|---|
| 3703 | "pxor %%mm1, %%mm1 \n\t"
|
|---|
| 3704 | "paddw %%mm3, %%mm7 \n\t"
|
|---|
| 3705 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 3706 | "packuswb %%mm1, %%mm7 \n\t"
|
|---|
| 3707 | "movq %%mm2, %%mm3 \n\t" // load c=Prior(x-bpp) step 1
|
|---|
| 3708 | "pand _ActiveMask, %%mm7 \n\t"
|
|---|
| 3709 | "punpckhbw %%mm0, %%mm2 \n\t" // unpack High bytes of b
|
|---|
| 3710 | "psllq _ShiftBpp, %%mm7 \n\t" // shift bytes to 2nd group of
|
|---|
| 3711 | // 3 bytes
|
|---|
| 3712 | // pav = p - a = (a + b - c) - a = b - c
|
|---|
| 3713 | "movq %%mm2, %%mm4 \n\t"
|
|---|
| 3714 | "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x)
|
|---|
| 3715 | "psllq _ShiftBpp, %%mm3 \n\t" // load c=Prior(x-bpp) step 2
|
|---|
| 3716 | "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value
|
|---|
| 3717 | "movq %%mm7, %%mm1 \n\t"
|
|---|
| 3718 | "punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
|
|---|
| 3719 | "psllq _ShiftBpp, %%mm1 \n\t" // shift bytes
|
|---|
| 3720 | // now mm1 will be used as Raw(x-bpp)
|
|---|
| 3721 | // now do Paeth for 3rd, and final, set of bytes (6-7)
|
|---|
| 3722 | "pxor %%mm7, %%mm7 \n\t"
|
|---|
| 3723 | "punpckhbw %%mm0, %%mm1 \n\t" // unpack High bytes of a
|
|---|
| 3724 | "psubw %%mm3, %%mm4 \n\t"
|
|---|
| 3725 | // pbv = p - b = (a + b - c) - b = a - c
|
|---|
| 3726 | "movq %%mm1, %%mm5 \n\t"
|
|---|
| 3727 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|---|
| 3728 | "movq %%mm4, %%mm6 \n\t"
|
|---|
| 3729 | "psubw %%mm3, %%mm5 \n\t"
|
|---|
| 3730 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 3731 | "paddw %%mm5, %%mm6 \n\t"
|
|---|
| 3732 |
|
|---|
| 3733 | // pa = abs(p-a) = abs(pav)
|
|---|
| 3734 | // pb = abs(p-b) = abs(pbv)
|
|---|
| 3735 | // pc = abs(p-c) = abs(pcv)
|
|---|
| 3736 | "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
|
|---|
| 3737 | "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
|
|---|
| 3738 | "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|---|
| 3739 | "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
|
|---|
| 3740 | "psubw %%mm0, %%mm4 \n\t"
|
|---|
| 3741 | "psubw %%mm7, %%mm5 \n\t"
|
|---|
| 3742 | "psubw %%mm0, %%mm4 \n\t"
|
|---|
| 3743 | "psubw %%mm7, %%mm5 \n\t"
|
|---|
| 3744 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 3745 | "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
|
|---|
| 3746 | "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|---|
| 3747 | "psubw %%mm0, %%mm6 \n\t"
|
|---|
| 3748 | // test pa <= pb
|
|---|
| 3749 | "movq %%mm4, %%mm7 \n\t"
|
|---|
| 3750 | "psubw %%mm0, %%mm6 \n\t"
|
|---|
| 3751 | "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
|
|---|
| 3752 | "movq %%mm7, %%mm0 \n\t"
|
|---|
| 3753 | // use mm0 mask copy to merge a & b
|
|---|
| 3754 | "pand %%mm0, %%mm2 \n\t"
|
|---|
| 3755 | // use mm7 mask to merge pa & pb
|
|---|
| 3756 | "pand %%mm7, %%mm5 \n\t"
|
|---|
| 3757 | "pandn %%mm1, %%mm0 \n\t"
|
|---|
| 3758 | "pandn %%mm4, %%mm7 \n\t"
|
|---|
| 3759 | "paddw %%mm2, %%mm0 \n\t"
|
|---|
| 3760 | "paddw %%mm5, %%mm7 \n\t"
|
|---|
| 3761 | // test ((pa <= pb)? pa:pb) <= pc
|
|---|
| 3762 | "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
|
|---|
| 3763 | "pand %%mm7, %%mm3 \n\t"
|
|---|
| 3764 | "pandn %%mm0, %%mm7 \n\t"
|
|---|
| 3765 | "paddw %%mm3, %%mm7 \n\t"
|
|---|
| 3766 | "pxor %%mm1, %%mm1 \n\t"
|
|---|
| 3767 | "packuswb %%mm7, %%mm1 \n\t"
|
|---|
| 3768 | // step ecx to next set of 8 bytes and repeat loop til done
|
|---|
| 3769 | "addl $8, %%ecx \n\t"
|
|---|
| 3770 | "pand _ActiveMaskEnd, %%mm1 \n\t"
|
|---|
| 3771 | "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add Paeth predictor with
|
|---|
| 3772 | // Raw(x)
|
|---|
| 3773 |
|
|---|
| 3774 | "cmpl _MMXLength, %%ecx \n\t"
|
|---|
| 3775 | "pxor %%mm0, %%mm0 \n\t" // pxor does not affect flags
|
|---|
| 3776 | "movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value
|
|---|
| 3777 | // mm1 will be used as Raw(x-bpp) next loop
|
|---|
| 3778 | // mm3 ready to be used as Prior(x-bpp) next loop
|
|---|
| 3779 | "jb paeth_3lp \n\t"
|
|---|
| 3780 |
|
|---|
| 3781 | : "=S" (dummy_value_S), // output regs (dummy)
|
|---|
| 3782 | "=D" (dummy_value_D)
|
|---|
| 3783 |
|
|---|
| 3784 | : "0" (prev_row), // esi // input regs
|
|---|
| 3785 | "1" (row) // edi
|
|---|
| 3786 |
|
|---|
| 3787 | : "%ecx" // clobber list
|
|---|
| 3788 | #if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 3789 | , "%mm0", "%mm1", "%mm2", "%mm3"
|
|---|
| 3790 | , "%mm4", "%mm5", "%mm6", "%mm7"
|
|---|
| 3791 | #endif
|
|---|
| 3792 | );
|
|---|
| 3793 | }
|
|---|
| 3794 | break; // end 3 bpp
|
|---|
| 3795 |
|
|---|
| 3796 | case 6:
|
|---|
| 3797 | //case 7: // GRR BOGUS
|
|---|
| 3798 | //case 5: // GRR BOGUS
|
|---|
| 3799 | {
|
|---|
| 3800 | _ActiveMask.use = 0x00000000ffffffffLL;
|
|---|
| 3801 | _ActiveMask2.use = 0xffffffff00000000LL;
|
|---|
| 3802 | _ShiftBpp.use = bpp << 3; // == bpp * 8
|
|---|
| 3803 | _ShiftRem.use = 64 - _ShiftBpp.use;
|
|---|
| 3804 |
|
|---|
| 3805 | __asm__ __volatile__ (
|
|---|
| 3806 | "movl _dif, %%ecx \n\t"
|
|---|
| 3807 | // preload "movl row, %%edi \n\t"
|
|---|
| 3808 | // preload "movl prev_row, %%esi \n\t"
|
|---|
| 3809 | // prime the pump: load the first Raw(x-bpp) data set
|
|---|
| 3810 | "movq -8(%%edi,%%ecx,), %%mm1 \n\t"
|
|---|
| 3811 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 3812 |
|
|---|
| 3813 | "paeth_6lp: \n\t"
|
|---|
| 3814 | // must shift to position Raw(x-bpp) data
|
|---|
| 3815 | "psrlq _ShiftRem, %%mm1 \n\t"
|
|---|
| 3816 | // do first set of 4 bytes
|
|---|
| 3817 | "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes
|
|---|
| 3818 | "punpcklbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a
|
|---|
| 3819 | "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x)
|
|---|
| 3820 | "punpcklbw %%mm0, %%mm2 \n\t" // unpack Low bytes of b
|
|---|
| 3821 | // must shift to position Prior(x-bpp) data
|
|---|
| 3822 | "psrlq _ShiftRem, %%mm3 \n\t"
|
|---|
| 3823 | // pav = p - a = (a + b - c) - a = b - c
|
|---|
| 3824 | "movq %%mm2, %%mm4 \n\t"
|
|---|
| 3825 | "punpcklbw %%mm0, %%mm3 \n\t" // unpack Low bytes of c
|
|---|
| 3826 | // pbv = p - b = (a + b - c) - b = a - c
|
|---|
| 3827 | "movq %%mm1, %%mm5 \n\t"
|
|---|
| 3828 | "psubw %%mm3, %%mm4 \n\t"
|
|---|
| 3829 | "pxor %%mm7, %%mm7 \n\t"
|
|---|
| 3830 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|---|
| 3831 | "movq %%mm4, %%mm6 \n\t"
|
|---|
| 3832 | "psubw %%mm3, %%mm5 \n\t"
|
|---|
| 3833 | // pa = abs(p-a) = abs(pav)
|
|---|
| 3834 | // pb = abs(p-b) = abs(pbv)
|
|---|
| 3835 | // pc = abs(p-c) = abs(pcv)
|
|---|
| 3836 | "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
|
|---|
| 3837 | "paddw %%mm5, %%mm6 \n\t"
|
|---|
| 3838 | "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|---|
| 3839 | "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
|
|---|
| 3840 | "psubw %%mm0, %%mm4 \n\t"
|
|---|
| 3841 | "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
|
|---|
| 3842 | "psubw %%mm0, %%mm4 \n\t"
|
|---|
| 3843 | "psubw %%mm7, %%mm5 \n\t"
|
|---|
| 3844 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 3845 | "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
|
|---|
| 3846 | "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|---|
| 3847 | "psubw %%mm7, %%mm5 \n\t"
|
|---|
| 3848 | "psubw %%mm0, %%mm6 \n\t"
|
|---|
| 3849 | // test pa <= pb
|
|---|
| 3850 | "movq %%mm4, %%mm7 \n\t"
|
|---|
| 3851 | "psubw %%mm0, %%mm6 \n\t"
|
|---|
| 3852 | "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
|
|---|
| 3853 | "movq %%mm7, %%mm0 \n\t"
|
|---|
| 3854 | // use mm7 mask to merge pa & pb
|
|---|
| 3855 | "pand %%mm7, %%mm5 \n\t"
|
|---|
| 3856 | // use mm0 mask copy to merge a & b
|
|---|
| 3857 | "pand %%mm0, %%mm2 \n\t"
|
|---|
| 3858 | "pandn %%mm4, %%mm7 \n\t"
|
|---|
| 3859 | "pandn %%mm1, %%mm0 \n\t"
|
|---|
| 3860 | "paddw %%mm5, %%mm7 \n\t"
|
|---|
| 3861 | "paddw %%mm2, %%mm0 \n\t"
|
|---|
| 3862 | // test ((pa <= pb)? pa:pb) <= pc
|
|---|
| 3863 | "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
|
|---|
| 3864 | "pxor %%mm1, %%mm1 \n\t"
|
|---|
| 3865 | "pand %%mm7, %%mm3 \n\t"
|
|---|
| 3866 | "pandn %%mm0, %%mm7 \n\t"
|
|---|
| 3867 | "paddw %%mm3, %%mm7 \n\t"
|
|---|
| 3868 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 3869 | "packuswb %%mm1, %%mm7 \n\t"
|
|---|
| 3870 | "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // load c=Prior(x-bpp)
|
|---|
| 3871 | "pand _ActiveMask, %%mm7 \n\t"
|
|---|
| 3872 | "psrlq _ShiftRem, %%mm3 \n\t"
|
|---|
| 3873 | "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x) step 1
|
|---|
| 3874 | "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor and Raw(x)
|
|---|
| 3875 | "movq %%mm2, %%mm6 \n\t"
|
|---|
| 3876 | "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value
|
|---|
| 3877 | "movq -8(%%edi,%%ecx,), %%mm1 \n\t"
|
|---|
| 3878 | "psllq _ShiftBpp, %%mm6 \n\t"
|
|---|
| 3879 | "movq %%mm7, %%mm5 \n\t"
|
|---|
| 3880 | "psrlq _ShiftRem, %%mm1 \n\t"
|
|---|
| 3881 | "por %%mm6, %%mm3 \n\t"
|
|---|
| 3882 | "psllq _ShiftBpp, %%mm5 \n\t"
|
|---|
| 3883 | "punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
|
|---|
| 3884 | "por %%mm5, %%mm1 \n\t"
|
|---|
| 3885 | // do second set of 4 bytes
|
|---|
| 3886 | "punpckhbw %%mm0, %%mm2 \n\t" // unpack High bytes of b
|
|---|
| 3887 | "punpckhbw %%mm0, %%mm1 \n\t" // unpack High bytes of a
|
|---|
| 3888 | // pav = p - a = (a + b - c) - a = b - c
|
|---|
| 3889 | "movq %%mm2, %%mm4 \n\t"
|
|---|
| 3890 | // pbv = p - b = (a + b - c) - b = a - c
|
|---|
| 3891 | "movq %%mm1, %%mm5 \n\t"
|
|---|
| 3892 | "psubw %%mm3, %%mm4 \n\t"
|
|---|
| 3893 | "pxor %%mm7, %%mm7 \n\t"
|
|---|
| 3894 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|---|
| 3895 | "movq %%mm4, %%mm6 \n\t"
|
|---|
| 3896 | "psubw %%mm3, %%mm5 \n\t"
|
|---|
| 3897 | // pa = abs(p-a) = abs(pav)
|
|---|
| 3898 | // pb = abs(p-b) = abs(pbv)
|
|---|
| 3899 | // pc = abs(p-c) = abs(pcv)
|
|---|
| 3900 | "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
|
|---|
| 3901 | "paddw %%mm5, %%mm6 \n\t"
|
|---|
| 3902 | "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|---|
| 3903 | "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
|
|---|
| 3904 | "psubw %%mm0, %%mm4 \n\t"
|
|---|
| 3905 | "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
|
|---|
| 3906 | "psubw %%mm0, %%mm4 \n\t"
|
|---|
| 3907 | "psubw %%mm7, %%mm5 \n\t"
|
|---|
| 3908 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 3909 | "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
|
|---|
| 3910 | "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|---|
| 3911 | "psubw %%mm7, %%mm5 \n\t"
|
|---|
| 3912 | "psubw %%mm0, %%mm6 \n\t"
|
|---|
| 3913 | // test pa <= pb
|
|---|
| 3914 | "movq %%mm4, %%mm7 \n\t"
|
|---|
| 3915 | "psubw %%mm0, %%mm6 \n\t"
|
|---|
| 3916 | "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
|
|---|
| 3917 | "movq %%mm7, %%mm0 \n\t"
|
|---|
| 3918 | // use mm7 mask to merge pa & pb
|
|---|
| 3919 | "pand %%mm7, %%mm5 \n\t"
|
|---|
| 3920 | // use mm0 mask copy to merge a & b
|
|---|
| 3921 | "pand %%mm0, %%mm2 \n\t"
|
|---|
| 3922 | "pandn %%mm4, %%mm7 \n\t"
|
|---|
| 3923 | "pandn %%mm1, %%mm0 \n\t"
|
|---|
| 3924 | "paddw %%mm5, %%mm7 \n\t"
|
|---|
| 3925 | "paddw %%mm2, %%mm0 \n\t"
|
|---|
| 3926 | // test ((pa <= pb)? pa:pb) <= pc
|
|---|
| 3927 | "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
|
|---|
| 3928 | "pxor %%mm1, %%mm1 \n\t"
|
|---|
| 3929 | "pand %%mm7, %%mm3 \n\t"
|
|---|
| 3930 | "pandn %%mm0, %%mm7 \n\t"
|
|---|
| 3931 | "pxor %%mm1, %%mm1 \n\t"
|
|---|
| 3932 | "paddw %%mm3, %%mm7 \n\t"
|
|---|
| 3933 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 3934 | // step ecx to next set of 8 bytes and repeat loop til done
|
|---|
| 3935 | "addl $8, %%ecx \n\t"
|
|---|
| 3936 | "packuswb %%mm7, %%mm1 \n\t"
|
|---|
| 3937 | "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add Paeth predictor with Raw(x)
|
|---|
| 3938 | "cmpl _MMXLength, %%ecx \n\t"
|
|---|
| 3939 | "movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value
|
|---|
| 3940 | // mm1 will be used as Raw(x-bpp) next loop
|
|---|
| 3941 | "jb paeth_6lp \n\t"
|
|---|
| 3942 |
|
|---|
| 3943 | : "=S" (dummy_value_S), // output regs (dummy)
|
|---|
| 3944 | "=D" (dummy_value_D)
|
|---|
| 3945 |
|
|---|
| 3946 | : "0" (prev_row), // esi // input regs
|
|---|
| 3947 | "1" (row) // edi
|
|---|
| 3948 |
|
|---|
| 3949 | : "%ecx" // clobber list
|
|---|
| 3950 | #if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 3951 | , "%mm0", "%mm1", "%mm2", "%mm3"
|
|---|
| 3952 | , "%mm4", "%mm5", "%mm6", "%mm7"
|
|---|
| 3953 | #endif
|
|---|
| 3954 | );
|
|---|
| 3955 | }
|
|---|
| 3956 | break; // end 6 bpp
|
|---|
| 3957 |
|
|---|
| 3958 | case 4:
|
|---|
| 3959 | {
|
|---|
| 3960 | _ActiveMask.use = 0x00000000ffffffffLL;
|
|---|
| 3961 |
|
|---|
| 3962 | __asm__ __volatile__ (
|
|---|
| 3963 | "movl _dif, %%ecx \n\t"
|
|---|
| 3964 | // preload "movl row, %%edi \n\t"
|
|---|
| 3965 | // preload "movl prev_row, %%esi \n\t"
|
|---|
| 3966 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 3967 | // prime the pump: load the first Raw(x-bpp) data set
|
|---|
| 3968 | "movq -8(%%edi,%%ecx,), %%mm1 \n\t" // only time should need to read
|
|---|
| 3969 | // a=Raw(x-bpp) bytes
|
|---|
| 3970 | "paeth_4lp: \n\t"
|
|---|
| 3971 | // do first set of 4 bytes
|
|---|
| 3972 | "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes
|
|---|
| 3973 | "punpckhbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a
|
|---|
| 3974 | "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x)
|
|---|
| 3975 | "punpcklbw %%mm0, %%mm2 \n\t" // unpack High bytes of b
|
|---|
| 3976 | // pav = p - a = (a + b - c) - a = b - c
|
|---|
| 3977 | "movq %%mm2, %%mm4 \n\t"
|
|---|
| 3978 | "punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
|
|---|
| 3979 | // pbv = p - b = (a + b - c) - b = a - c
|
|---|
| 3980 | "movq %%mm1, %%mm5 \n\t"
|
|---|
| 3981 | "psubw %%mm3, %%mm4 \n\t"
|
|---|
| 3982 | "pxor %%mm7, %%mm7 \n\t"
|
|---|
| 3983 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|---|
| 3984 | "movq %%mm4, %%mm6 \n\t"
|
|---|
| 3985 | "psubw %%mm3, %%mm5 \n\t"
|
|---|
| 3986 | // pa = abs(p-a) = abs(pav)
|
|---|
| 3987 | // pb = abs(p-b) = abs(pbv)
|
|---|
| 3988 | // pc = abs(p-c) = abs(pcv)
|
|---|
| 3989 | "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
|
|---|
| 3990 | "paddw %%mm5, %%mm6 \n\t"
|
|---|
| 3991 | "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|---|
| 3992 | "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
|
|---|
| 3993 | "psubw %%mm0, %%mm4 \n\t"
|
|---|
| 3994 | "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
|
|---|
| 3995 | "psubw %%mm0, %%mm4 \n\t"
|
|---|
| 3996 | "psubw %%mm7, %%mm5 \n\t"
|
|---|
| 3997 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 3998 | "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
|
|---|
| 3999 | "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|---|
| 4000 | "psubw %%mm7, %%mm5 \n\t"
|
|---|
| 4001 | "psubw %%mm0, %%mm6 \n\t"
|
|---|
| 4002 | // test pa <= pb
|
|---|
| 4003 | "movq %%mm4, %%mm7 \n\t"
|
|---|
| 4004 | "psubw %%mm0, %%mm6 \n\t"
|
|---|
| 4005 | "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
|
|---|
| 4006 | "movq %%mm7, %%mm0 \n\t"
|
|---|
| 4007 | // use mm7 mask to merge pa & pb
|
|---|
| 4008 | "pand %%mm7, %%mm5 \n\t"
|
|---|
| 4009 | // use mm0 mask copy to merge a & b
|
|---|
| 4010 | "pand %%mm0, %%mm2 \n\t"
|
|---|
| 4011 | "pandn %%mm4, %%mm7 \n\t"
|
|---|
| 4012 | "pandn %%mm1, %%mm0 \n\t"
|
|---|
| 4013 | "paddw %%mm5, %%mm7 \n\t"
|
|---|
| 4014 | "paddw %%mm2, %%mm0 \n\t"
|
|---|
| 4015 | // test ((pa <= pb)? pa:pb) <= pc
|
|---|
| 4016 | "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
|
|---|
| 4017 | "pxor %%mm1, %%mm1 \n\t"
|
|---|
| 4018 | "pand %%mm7, %%mm3 \n\t"
|
|---|
| 4019 | "pandn %%mm0, %%mm7 \n\t"
|
|---|
| 4020 | "paddw %%mm3, %%mm7 \n\t"
|
|---|
| 4021 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 4022 | "packuswb %%mm1, %%mm7 \n\t"
|
|---|
| 4023 | "movq (%%esi,%%ecx,), %%mm3 \n\t" // load c=Prior(x-bpp)
|
|---|
| 4024 | "pand _ActiveMask, %%mm7 \n\t"
|
|---|
| 4025 | "movq %%mm3, %%mm2 \n\t" // load b=Prior(x) step 1
|
|---|
| 4026 | "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x)
|
|---|
| 4027 | "punpcklbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
|
|---|
| 4028 | "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value
|
|---|
| 4029 | "movq %%mm7, %%mm1 \n\t" // now mm1 will be used as Raw(x-bpp)
|
|---|
| 4030 | // do second set of 4 bytes
|
|---|
| 4031 | "punpckhbw %%mm0, %%mm2 \n\t" // unpack Low bytes of b
|
|---|
| 4032 | "punpcklbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a
|
|---|
| 4033 | // pav = p - a = (a + b - c) - a = b - c
|
|---|
| 4034 | "movq %%mm2, %%mm4 \n\t"
|
|---|
| 4035 | // pbv = p - b = (a + b - c) - b = a - c
|
|---|
| 4036 | "movq %%mm1, %%mm5 \n\t"
|
|---|
| 4037 | "psubw %%mm3, %%mm4 \n\t"
|
|---|
| 4038 | "pxor %%mm7, %%mm7 \n\t"
|
|---|
| 4039 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|---|
| 4040 | "movq %%mm4, %%mm6 \n\t"
|
|---|
| 4041 | "psubw %%mm3, %%mm5 \n\t"
|
|---|
| 4042 | // pa = abs(p-a) = abs(pav)
|
|---|
| 4043 | // pb = abs(p-b) = abs(pbv)
|
|---|
| 4044 | // pc = abs(p-c) = abs(pcv)
|
|---|
| 4045 | "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
|
|---|
| 4046 | "paddw %%mm5, %%mm6 \n\t"
|
|---|
| 4047 | "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|---|
| 4048 | "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
|
|---|
| 4049 | "psubw %%mm0, %%mm4 \n\t"
|
|---|
| 4050 | "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
|
|---|
| 4051 | "psubw %%mm0, %%mm4 \n\t"
|
|---|
| 4052 | "psubw %%mm7, %%mm5 \n\t"
|
|---|
| 4053 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 4054 | "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
|
|---|
| 4055 | "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|---|
| 4056 | "psubw %%mm7, %%mm5 \n\t"
|
|---|
| 4057 | "psubw %%mm0, %%mm6 \n\t"
|
|---|
| 4058 | // test pa <= pb
|
|---|
| 4059 | "movq %%mm4, %%mm7 \n\t"
|
|---|
| 4060 | "psubw %%mm0, %%mm6 \n\t"
|
|---|
| 4061 | "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
|
|---|
| 4062 | "movq %%mm7, %%mm0 \n\t"
|
|---|
| 4063 | // use mm7 mask to merge pa & pb
|
|---|
| 4064 | "pand %%mm7, %%mm5 \n\t"
|
|---|
| 4065 | // use mm0 mask copy to merge a & b
|
|---|
| 4066 | "pand %%mm0, %%mm2 \n\t"
|
|---|
| 4067 | "pandn %%mm4, %%mm7 \n\t"
|
|---|
| 4068 | "pandn %%mm1, %%mm0 \n\t"
|
|---|
| 4069 | "paddw %%mm5, %%mm7 \n\t"
|
|---|
| 4070 | "paddw %%mm2, %%mm0 \n\t"
|
|---|
| 4071 | // test ((pa <= pb)? pa:pb) <= pc
|
|---|
| 4072 | "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
|
|---|
| 4073 | "pxor %%mm1, %%mm1 \n\t"
|
|---|
| 4074 | "pand %%mm7, %%mm3 \n\t"
|
|---|
| 4075 | "pandn %%mm0, %%mm7 \n\t"
|
|---|
| 4076 | "pxor %%mm1, %%mm1 \n\t"
|
|---|
| 4077 | "paddw %%mm3, %%mm7 \n\t"
|
|---|
| 4078 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 4079 | // step ecx to next set of 8 bytes and repeat loop til done
|
|---|
| 4080 | "addl $8, %%ecx \n\t"
|
|---|
| 4081 | "packuswb %%mm7, %%mm1 \n\t"
|
|---|
| 4082 | "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add predictor with Raw(x)
|
|---|
| 4083 | "cmpl _MMXLength, %%ecx \n\t"
|
|---|
| 4084 | "movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value
|
|---|
| 4085 | // mm1 will be used as Raw(x-bpp) next loop
|
|---|
| 4086 | "jb paeth_4lp \n\t"
|
|---|
| 4087 |
|
|---|
| 4088 | : "=S" (dummy_value_S), // output regs (dummy)
|
|---|
| 4089 | "=D" (dummy_value_D)
|
|---|
| 4090 |
|
|---|
| 4091 | : "0" (prev_row), // esi // input regs
|
|---|
| 4092 | "1" (row) // edi
|
|---|
| 4093 |
|
|---|
| 4094 | : "%ecx" // clobber list
|
|---|
| 4095 | #if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 4096 | , "%mm0", "%mm1", "%mm2", "%mm3"
|
|---|
| 4097 | , "%mm4", "%mm5", "%mm6", "%mm7"
|
|---|
| 4098 | #endif
|
|---|
| 4099 | );
|
|---|
| 4100 | }
|
|---|
| 4101 | break; // end 4 bpp
|
|---|
| 4102 |
|
|---|
| 4103 | case 8: // bpp == 8
|
|---|
| 4104 | {
|
|---|
| 4105 | _ActiveMask.use = 0x00000000ffffffffLL;
|
|---|
| 4106 |
|
|---|
| 4107 | __asm__ __volatile__ (
|
|---|
| 4108 | "movl _dif, %%ecx \n\t"
|
|---|
| 4109 | // preload "movl row, %%edi \n\t"
|
|---|
| 4110 | // preload "movl prev_row, %%esi \n\t"
|
|---|
| 4111 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 4112 | // prime the pump: load the first Raw(x-bpp) data set
|
|---|
| 4113 | "movq -8(%%edi,%%ecx,), %%mm1 \n\t" // only time should need to read
|
|---|
| 4114 | // a=Raw(x-bpp) bytes
|
|---|
| 4115 | "paeth_8lp: \n\t"
|
|---|
| 4116 | // do first set of 4 bytes
|
|---|
| 4117 | "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes
|
|---|
| 4118 | "punpcklbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a
|
|---|
| 4119 | "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x)
|
|---|
| 4120 | "punpcklbw %%mm0, %%mm2 \n\t" // unpack Low bytes of b
|
|---|
| 4121 | // pav = p - a = (a + b - c) - a = b - c
|
|---|
| 4122 | "movq %%mm2, %%mm4 \n\t"
|
|---|
| 4123 | "punpcklbw %%mm0, %%mm3 \n\t" // unpack Low bytes of c
|
|---|
| 4124 | // pbv = p - b = (a + b - c) - b = a - c
|
|---|
| 4125 | "movq %%mm1, %%mm5 \n\t"
|
|---|
| 4126 | "psubw %%mm3, %%mm4 \n\t"
|
|---|
| 4127 | "pxor %%mm7, %%mm7 \n\t"
|
|---|
| 4128 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|---|
| 4129 | "movq %%mm4, %%mm6 \n\t"
|
|---|
| 4130 | "psubw %%mm3, %%mm5 \n\t"
|
|---|
| 4131 | // pa = abs(p-a) = abs(pav)
|
|---|
| 4132 | // pb = abs(p-b) = abs(pbv)
|
|---|
| 4133 | // pc = abs(p-c) = abs(pcv)
|
|---|
| 4134 | "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
|
|---|
| 4135 | "paddw %%mm5, %%mm6 \n\t"
|
|---|
| 4136 | "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|---|
| 4137 | "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
|
|---|
| 4138 | "psubw %%mm0, %%mm4 \n\t"
|
|---|
| 4139 | "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
|
|---|
| 4140 | "psubw %%mm0, %%mm4 \n\t"
|
|---|
| 4141 | "psubw %%mm7, %%mm5 \n\t"
|
|---|
| 4142 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 4143 | "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
|
|---|
| 4144 | "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|---|
| 4145 | "psubw %%mm7, %%mm5 \n\t"
|
|---|
| 4146 | "psubw %%mm0, %%mm6 \n\t"
|
|---|
| 4147 | // test pa <= pb
|
|---|
| 4148 | "movq %%mm4, %%mm7 \n\t"
|
|---|
| 4149 | "psubw %%mm0, %%mm6 \n\t"
|
|---|
| 4150 | "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
|
|---|
| 4151 | "movq %%mm7, %%mm0 \n\t"
|
|---|
| 4152 | // use mm7 mask to merge pa & pb
|
|---|
| 4153 | "pand %%mm7, %%mm5 \n\t"
|
|---|
| 4154 | // use mm0 mask copy to merge a & b
|
|---|
| 4155 | "pand %%mm0, %%mm2 \n\t"
|
|---|
| 4156 | "pandn %%mm4, %%mm7 \n\t"
|
|---|
| 4157 | "pandn %%mm1, %%mm0 \n\t"
|
|---|
| 4158 | "paddw %%mm5, %%mm7 \n\t"
|
|---|
| 4159 | "paddw %%mm2, %%mm0 \n\t"
|
|---|
| 4160 | // test ((pa <= pb)? pa:pb) <= pc
|
|---|
| 4161 | "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
|
|---|
| 4162 | "pxor %%mm1, %%mm1 \n\t"
|
|---|
| 4163 | "pand %%mm7, %%mm3 \n\t"
|
|---|
| 4164 | "pandn %%mm0, %%mm7 \n\t"
|
|---|
| 4165 | "paddw %%mm3, %%mm7 \n\t"
|
|---|
| 4166 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 4167 | "packuswb %%mm1, %%mm7 \n\t"
|
|---|
| 4168 | "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes
|
|---|
| 4169 | "pand _ActiveMask, %%mm7 \n\t"
|
|---|
| 4170 | "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x)
|
|---|
| 4171 | "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x)
|
|---|
| 4172 | "punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c
|
|---|
| 4173 | "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value
|
|---|
| 4174 | "movq -8(%%edi,%%ecx,), %%mm1 \n\t" // read a=Raw(x-bpp) bytes
|
|---|
| 4175 |
|
|---|
| 4176 | // do second set of 4 bytes
|
|---|
| 4177 | "punpckhbw %%mm0, %%mm2 \n\t" // unpack High bytes of b
|
|---|
| 4178 | "punpckhbw %%mm0, %%mm1 \n\t" // unpack High bytes of a
|
|---|
| 4179 | // pav = p - a = (a + b - c) - a = b - c
|
|---|
| 4180 | "movq %%mm2, %%mm4 \n\t"
|
|---|
| 4181 | // pbv = p - b = (a + b - c) - b = a - c
|
|---|
| 4182 | "movq %%mm1, %%mm5 \n\t"
|
|---|
| 4183 | "psubw %%mm3, %%mm4 \n\t"
|
|---|
| 4184 | "pxor %%mm7, %%mm7 \n\t"
|
|---|
| 4185 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|---|
| 4186 | "movq %%mm4, %%mm6 \n\t"
|
|---|
| 4187 | "psubw %%mm3, %%mm5 \n\t"
|
|---|
| 4188 | // pa = abs(p-a) = abs(pav)
|
|---|
| 4189 | // pb = abs(p-b) = abs(pbv)
|
|---|
| 4190 | // pc = abs(p-c) = abs(pcv)
|
|---|
| 4191 | "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0
|
|---|
| 4192 | "paddw %%mm5, %%mm6 \n\t"
|
|---|
| 4193 | "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|---|
| 4194 | "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0
|
|---|
| 4195 | "psubw %%mm0, %%mm4 \n\t"
|
|---|
| 4196 | "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0
|
|---|
| 4197 | "psubw %%mm0, %%mm4 \n\t"
|
|---|
| 4198 | "psubw %%mm7, %%mm5 \n\t"
|
|---|
| 4199 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 4200 | "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0
|
|---|
| 4201 | "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7
|
|---|
| 4202 | "psubw %%mm7, %%mm5 \n\t"
|
|---|
| 4203 | "psubw %%mm0, %%mm6 \n\t"
|
|---|
| 4204 | // test pa <= pb
|
|---|
| 4205 | "movq %%mm4, %%mm7 \n\t"
|
|---|
| 4206 | "psubw %%mm0, %%mm6 \n\t"
|
|---|
| 4207 | "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb?
|
|---|
| 4208 | "movq %%mm7, %%mm0 \n\t"
|
|---|
| 4209 | // use mm7 mask to merge pa & pb
|
|---|
| 4210 | "pand %%mm7, %%mm5 \n\t"
|
|---|
| 4211 | // use mm0 mask copy to merge a & b
|
|---|
| 4212 | "pand %%mm0, %%mm2 \n\t"
|
|---|
| 4213 | "pandn %%mm4, %%mm7 \n\t"
|
|---|
| 4214 | "pandn %%mm1, %%mm0 \n\t"
|
|---|
| 4215 | "paddw %%mm5, %%mm7 \n\t"
|
|---|
| 4216 | "paddw %%mm2, %%mm0 \n\t"
|
|---|
| 4217 | // test ((pa <= pb)? pa:pb) <= pc
|
|---|
| 4218 | "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc?
|
|---|
| 4219 | "pxor %%mm1, %%mm1 \n\t"
|
|---|
| 4220 | "pand %%mm7, %%mm3 \n\t"
|
|---|
| 4221 | "pandn %%mm0, %%mm7 \n\t"
|
|---|
| 4222 | "pxor %%mm1, %%mm1 \n\t"
|
|---|
| 4223 | "paddw %%mm3, %%mm7 \n\t"
|
|---|
| 4224 | "pxor %%mm0, %%mm0 \n\t"
|
|---|
| 4225 | // step ecx to next set of 8 bytes and repeat loop til done
|
|---|
| 4226 | "addl $8, %%ecx \n\t"
|
|---|
| 4227 | "packuswb %%mm7, %%mm1 \n\t"
|
|---|
| 4228 | "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add Paeth predictor with Raw(x)
|
|---|
| 4229 | "cmpl _MMXLength, %%ecx \n\t"
|
|---|
| 4230 | "movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value
|
|---|
| 4231 | // mm1 will be used as Raw(x-bpp) next loop
|
|---|
| 4232 | "jb paeth_8lp \n\t"
|
|---|
| 4233 |
|
|---|
| 4234 | : "=S" (dummy_value_S), // output regs (dummy)
|
|---|
| 4235 | "=D" (dummy_value_D)
|
|---|
| 4236 |
|
|---|
| 4237 | : "0" (prev_row), // esi // input regs
|
|---|
| 4238 | "1" (row) // edi
|
|---|
| 4239 |
|
|---|
| 4240 | : "%ecx" // clobber list
|
|---|
| 4241 | #if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 4242 | , "%mm0", "%mm1", "%mm2", "%mm3"
|
|---|
| 4243 | , "%mm4", "%mm5", "%mm6", "%mm7"
|
|---|
| 4244 | #endif
|
|---|
| 4245 | );
|
|---|
| 4246 | }
|
|---|
| 4247 | break; // end 8 bpp
|
|---|
| 4248 |
|
|---|
| 4249 | case 1: // bpp = 1
|
|---|
| 4250 | case 2: // bpp = 2
|
|---|
| 4251 | default: // bpp > 8
|
|---|
| 4252 | {
|
|---|
| 4253 | __asm__ __volatile__ (
|
|---|
| 4254 | #ifdef __PIC__
|
|---|
| 4255 | "pushl %%ebx \n\t" // save Global Offset Table index
|
|---|
| 4256 | #endif
|
|---|
| 4257 | "movl _dif, %%ebx \n\t"
|
|---|
| 4258 | "cmpl _FullLength, %%ebx \n\t"
|
|---|
| 4259 | "jnb paeth_dend \n\t"
|
|---|
| 4260 |
|
|---|
| 4261 | // preload "movl row, %%edi \n\t"
|
|---|
| 4262 | // preload "movl prev_row, %%esi \n\t"
|
|---|
| 4263 | // do Paeth decode for remaining bytes
|
|---|
| 4264 | "movl %%ebx, %%edx \n\t"
|
|---|
| 4265 | // preload "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx)
|
|---|
| 4266 | "subl %%ecx, %%edx \n\t" // edx = ebx - bpp
|
|---|
| 4267 | "xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx
|
|---|
| 4268 |
|
|---|
| 4269 | "paeth_dlp: \n\t"
|
|---|
| 4270 | "xorl %%eax, %%eax \n\t"
|
|---|
| 4271 | // pav = p - a = (a + b - c) - a = b - c
|
|---|
| 4272 | "movb (%%esi,%%ebx,), %%al \n\t" // load Prior(x) into al
|
|---|
| 4273 | "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
|
|---|
| 4274 | "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp)
|
|---|
| 4275 | "movl %%eax, _patemp \n\t" // Save pav for later use
|
|---|
| 4276 | "xorl %%eax, %%eax \n\t"
|
|---|
| 4277 | // pbv = p - b = (a + b - c) - b = a - c
|
|---|
| 4278 | "movb (%%edi,%%edx,), %%al \n\t" // load Raw(x-bpp) into al
|
|---|
| 4279 | "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp)
|
|---|
| 4280 | "movl %%eax, %%ecx \n\t"
|
|---|
| 4281 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|---|
| 4282 | "addl _patemp, %%eax \n\t" // pcv = pav + pbv
|
|---|
| 4283 | // pc = abs(pcv)
|
|---|
| 4284 | "testl $0x80000000, %%eax \n\t"
|
|---|
| 4285 | "jz paeth_dpca \n\t"
|
|---|
| 4286 | "negl %%eax \n\t" // reverse sign of neg values
|
|---|
| 4287 |
|
|---|
| 4288 | "paeth_dpca: \n\t"
|
|---|
| 4289 | "movl %%eax, _pctemp \n\t" // save pc for later use
|
|---|
| 4290 | // pb = abs(pbv)
|
|---|
| 4291 | "testl $0x80000000, %%ecx \n\t"
|
|---|
| 4292 | "jz paeth_dpba \n\t"
|
|---|
| 4293 | "negl %%ecx \n\t" // reverse sign of neg values
|
|---|
| 4294 |
|
|---|
| 4295 | "paeth_dpba: \n\t"
|
|---|
| 4296 | "movl %%ecx, _pbtemp \n\t" // save pb for later use
|
|---|
| 4297 | // pa = abs(pav)
|
|---|
| 4298 | "movl _patemp, %%eax \n\t"
|
|---|
| 4299 | "testl $0x80000000, %%eax \n\t"
|
|---|
| 4300 | "jz paeth_dpaa \n\t"
|
|---|
| 4301 | "negl %%eax \n\t" // reverse sign of neg values
|
|---|
| 4302 |
|
|---|
| 4303 | "paeth_dpaa: \n\t"
|
|---|
| 4304 | "movl %%eax, _patemp \n\t" // save pa for later use
|
|---|
| 4305 | // test if pa <= pb
|
|---|
| 4306 | "cmpl %%ecx, %%eax \n\t"
|
|---|
| 4307 | "jna paeth_dabb \n\t"
|
|---|
| 4308 | // pa > pb; now test if pb <= pc
|
|---|
| 4309 | "cmpl _pctemp, %%ecx \n\t"
|
|---|
| 4310 | "jna paeth_dbbc \n\t"
|
|---|
| 4311 | // pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp)
|
|---|
| 4312 | "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
|
|---|
| 4313 | "jmp paeth_dpaeth \n\t"
|
|---|
| 4314 |
|
|---|
| 4315 | "paeth_dbbc: \n\t"
|
|---|
| 4316 | // pb <= pc; Raw(x) = Paeth(x) + Prior(x)
|
|---|
| 4317 | "movb (%%esi,%%ebx,), %%cl \n\t" // load Prior(x) into cl
|
|---|
| 4318 | "jmp paeth_dpaeth \n\t"
|
|---|
| 4319 |
|
|---|
| 4320 | "paeth_dabb: \n\t"
|
|---|
| 4321 | // pa <= pb; now test if pa <= pc
|
|---|
| 4322 | "cmpl _pctemp, %%eax \n\t"
|
|---|
| 4323 | "jna paeth_dabc \n\t"
|
|---|
| 4324 | // pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp)
|
|---|
| 4325 | "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
|
|---|
| 4326 | "jmp paeth_dpaeth \n\t"
|
|---|
| 4327 |
|
|---|
| 4328 | "paeth_dabc: \n\t"
|
|---|
| 4329 | // pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp)
|
|---|
| 4330 | "movb (%%edi,%%edx,), %%cl \n\t" // load Raw(x-bpp) into cl
|
|---|
| 4331 |
|
|---|
| 4332 | "paeth_dpaeth: \n\t"
|
|---|
| 4333 | "incl %%ebx \n\t"
|
|---|
| 4334 | "incl %%edx \n\t"
|
|---|
| 4335 | // Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256
|
|---|
| 4336 | "addb %%cl, -1(%%edi,%%ebx,) \n\t"
|
|---|
| 4337 | "cmpl _FullLength, %%ebx \n\t"
|
|---|
| 4338 | "jb paeth_dlp \n\t"
|
|---|
| 4339 |
|
|---|
| 4340 | "paeth_dend: \n\t"
|
|---|
| 4341 | #ifdef __PIC__
|
|---|
| 4342 | "popl %%ebx \n\t" // index to Global Offset Table
|
|---|
| 4343 | #endif
|
|---|
| 4344 |
|
|---|
| 4345 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 4346 | "=S" (dummy_value_S),
|
|---|
| 4347 | "=D" (dummy_value_D)
|
|---|
| 4348 |
|
|---|
| 4349 | : "0" (bpp), // ecx // input regs
|
|---|
| 4350 | "1" (prev_row), // esi
|
|---|
| 4351 | "2" (row) // edi
|
|---|
| 4352 |
|
|---|
| 4353 | : "%eax", "%edx" // clobber list
|
|---|
| 4354 | #ifndef __PIC__
|
|---|
| 4355 | , "%ebx"
|
|---|
| 4356 | #endif
|
|---|
| 4357 | );
|
|---|
| 4358 | }
|
|---|
| 4359 | return; // No need to go further with this one
|
|---|
| 4360 |
|
|---|
| 4361 | } // end switch (bpp)
|
|---|
| 4362 |
|
|---|
| 4363 | __asm__ __volatile__ (
|
|---|
| 4364 | // MMX acceleration complete; now do clean-up
|
|---|
| 4365 | // check if any remaining bytes left to decode
|
|---|
| 4366 | #ifdef __PIC__
|
|---|
| 4367 | "pushl %%ebx \n\t" // save index to Global Offset Table
|
|---|
| 4368 | #endif
|
|---|
| 4369 | "movl _MMXLength, %%ebx \n\t"
|
|---|
| 4370 | "cmpl _FullLength, %%ebx \n\t"
|
|---|
| 4371 | "jnb paeth_end \n\t"
|
|---|
| 4372 | //pre "movl row, %%edi \n\t"
|
|---|
| 4373 | //pre "movl prev_row, %%esi \n\t"
|
|---|
| 4374 | // do Paeth decode for remaining bytes
|
|---|
| 4375 | "movl %%ebx, %%edx \n\t"
|
|---|
| 4376 | //pre "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx)
|
|---|
| 4377 | "subl %%ecx, %%edx \n\t" // edx = ebx - bpp
|
|---|
| 4378 | "xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx below
|
|---|
| 4379 |
|
|---|
| 4380 | "paeth_lp2: \n\t"
|
|---|
| 4381 | "xorl %%eax, %%eax \n\t"
|
|---|
| 4382 | // pav = p - a = (a + b - c) - a = b - c
|
|---|
| 4383 | "movb (%%esi,%%ebx,), %%al \n\t" // load Prior(x) into al
|
|---|
| 4384 | "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
|
|---|
| 4385 | "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp)
|
|---|
| 4386 | "movl %%eax, _patemp \n\t" // Save pav for later use
|
|---|
| 4387 | "xorl %%eax, %%eax \n\t"
|
|---|
| 4388 | // pbv = p - b = (a + b - c) - b = a - c
|
|---|
| 4389 | "movb (%%edi,%%edx,), %%al \n\t" // load Raw(x-bpp) into al
|
|---|
| 4390 | "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp)
|
|---|
| 4391 | "movl %%eax, %%ecx \n\t"
|
|---|
| 4392 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv
|
|---|
| 4393 | "addl _patemp, %%eax \n\t" // pcv = pav + pbv
|
|---|
| 4394 | // pc = abs(pcv)
|
|---|
| 4395 | "testl $0x80000000, %%eax \n\t"
|
|---|
| 4396 | "jz paeth_pca2 \n\t"
|
|---|
| 4397 | "negl %%eax \n\t" // reverse sign of neg values
|
|---|
| 4398 |
|
|---|
| 4399 | "paeth_pca2: \n\t"
|
|---|
| 4400 | "movl %%eax, _pctemp \n\t" // save pc for later use
|
|---|
| 4401 | // pb = abs(pbv)
|
|---|
| 4402 | "testl $0x80000000, %%ecx \n\t"
|
|---|
| 4403 | "jz paeth_pba2 \n\t"
|
|---|
| 4404 | "negl %%ecx \n\t" // reverse sign of neg values
|
|---|
| 4405 |
|
|---|
| 4406 | "paeth_pba2: \n\t"
|
|---|
| 4407 | "movl %%ecx, _pbtemp \n\t" // save pb for later use
|
|---|
| 4408 | // pa = abs(pav)
|
|---|
| 4409 | "movl _patemp, %%eax \n\t"
|
|---|
| 4410 | "testl $0x80000000, %%eax \n\t"
|
|---|
| 4411 | "jz paeth_paa2 \n\t"
|
|---|
| 4412 | "negl %%eax \n\t" // reverse sign of neg values
|
|---|
| 4413 |
|
|---|
| 4414 | "paeth_paa2: \n\t"
|
|---|
| 4415 | "movl %%eax, _patemp \n\t" // save pa for later use
|
|---|
| 4416 | // test if pa <= pb
|
|---|
| 4417 | "cmpl %%ecx, %%eax \n\t"
|
|---|
| 4418 | "jna paeth_abb2 \n\t"
|
|---|
| 4419 | // pa > pb; now test if pb <= pc
|
|---|
| 4420 | "cmpl _pctemp, %%ecx \n\t"
|
|---|
| 4421 | "jna paeth_bbc2 \n\t"
|
|---|
| 4422 | // pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp)
|
|---|
| 4423 | "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
|
|---|
| 4424 | "jmp paeth_paeth2 \n\t"
|
|---|
| 4425 |
|
|---|
| 4426 | "paeth_bbc2: \n\t"
|
|---|
| 4427 | // pb <= pc; Raw(x) = Paeth(x) + Prior(x)
|
|---|
| 4428 | "movb (%%esi,%%ebx,), %%cl \n\t" // load Prior(x) into cl
|
|---|
| 4429 | "jmp paeth_paeth2 \n\t"
|
|---|
| 4430 |
|
|---|
| 4431 | "paeth_abb2: \n\t"
|
|---|
| 4432 | // pa <= pb; now test if pa <= pc
|
|---|
| 4433 | "cmpl _pctemp, %%eax \n\t"
|
|---|
| 4434 | "jna paeth_abc2 \n\t"
|
|---|
| 4435 | // pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp)
|
|---|
| 4436 | "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl
|
|---|
| 4437 | "jmp paeth_paeth2 \n\t"
|
|---|
| 4438 |
|
|---|
| 4439 | "paeth_abc2: \n\t"
|
|---|
| 4440 | // pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp)
|
|---|
| 4441 | "movb (%%edi,%%edx,), %%cl \n\t" // load Raw(x-bpp) into cl
|
|---|
| 4442 |
|
|---|
| 4443 | "paeth_paeth2: \n\t"
|
|---|
| 4444 | "incl %%ebx \n\t"
|
|---|
| 4445 | "incl %%edx \n\t"
|
|---|
| 4446 | // Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256
|
|---|
| 4447 | "addb %%cl, -1(%%edi,%%ebx,) \n\t"
|
|---|
| 4448 | "cmpl _FullLength, %%ebx \n\t"
|
|---|
| 4449 | "jb paeth_lp2 \n\t"
|
|---|
| 4450 |
|
|---|
| 4451 | "paeth_end: \n\t"
|
|---|
| 4452 | "EMMS \n\t" // end MMX; prep for poss. FP instrs.
|
|---|
| 4453 | #ifdef __PIC__
|
|---|
| 4454 | "popl %%ebx \n\t" // restore index to Global Offset Table
|
|---|
| 4455 | #endif
|
|---|
| 4456 |
|
|---|
| 4457 | : "=c" (dummy_value_c), // output regs (dummy)
|
|---|
| 4458 | "=S" (dummy_value_S),
|
|---|
| 4459 | "=D" (dummy_value_D)
|
|---|
| 4460 |
|
|---|
| 4461 | : "0" (bpp), // ecx // input regs
|
|---|
| 4462 | "1" (prev_row), // esi
|
|---|
| 4463 | "2" (row) // edi
|
|---|
| 4464 |
|
|---|
| 4465 | : "%eax", "%edx" // clobber list (no input regs!)
|
|---|
| 4466 | #ifndef __PIC__
|
|---|
| 4467 | , "%ebx"
|
|---|
| 4468 | #endif
|
|---|
| 4469 | );
|
|---|
| 4470 |
|
|---|
| 4471 | } /* end png_read_filter_row_mmx_paeth() */
|
|---|
| 4472 | #endif
|
|---|
| 4473 |
|
|---|
| 4474 |
|
|---|
| 4475 |
|
|---|
| 4476 |
|
|---|
| 4477 | #ifdef PNG_THREAD_UNSAFE_OK
|
|---|
| 4478 | //===========================================================================//
|
|---|
| 4479 | // //
|
|---|
| 4480 | // P N G _ R E A D _ F I L T E R _ R O W _ M M X _ S U B //
|
|---|
| 4481 | // //
|
|---|
| 4482 | //===========================================================================//
|
|---|
| 4483 |
|
|---|
| 4484 | // Optimized code for PNG Sub filter decoder
|
|---|
| 4485 |
|
|---|
| 4486 | static void /* PRIVATE */
|
|---|
| 4487 | png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row)
|
|---|
| 4488 | {
|
|---|
| 4489 | int bpp;
|
|---|
| 4490 | int dummy_value_a;
|
|---|
| 4491 | int dummy_value_D;
|
|---|
| 4492 |
|
|---|
| 4493 | bpp = (row_info->pixel_depth + 7) >> 3; // calc number of bytes per pixel
|
|---|
| 4494 | _FullLength = row_info->rowbytes - bpp; // number of bytes to filter
|
|---|
| 4495 |
|
|---|
| 4496 | __asm__ __volatile__ (
|
|---|
| 4497 | //pre "movl row, %%edi \n\t"
|
|---|
| 4498 | "movl %%edi, %%esi \n\t" // lp = row
|
|---|
| 4499 | //pre "movl bpp, %%eax \n\t"
|
|---|
| 4500 | "addl %%eax, %%edi \n\t" // rp = row + bpp
|
|---|
| 4501 | //irr "xorl %%eax, %%eax \n\t"
|
|---|
| 4502 | // get # of bytes to alignment
|
|---|
| 4503 | "movl %%edi, _dif \n\t" // take start of row
|
|---|
| 4504 | "addl $0xf, _dif \n\t" // add 7 + 8 to incr past
|
|---|
| 4505 | // alignment boundary
|
|---|
| 4506 | "xorl %%ecx, %%ecx \n\t"
|
|---|
| 4507 | "andl $0xfffffff8, _dif \n\t" // mask to alignment boundary
|
|---|
| 4508 | "subl %%edi, _dif \n\t" // subtract from start ==> value
|
|---|
| 4509 | "jz sub_go \n\t" // ecx at alignment
|
|---|
| 4510 |
|
|---|
| 4511 | "sub_lp1: \n\t" // fix alignment
|
|---|
| 4512 | "movb (%%esi,%%ecx,), %%al \n\t"
|
|---|
| 4513 | "addb %%al, (%%edi,%%ecx,) \n\t"
|
|---|
| 4514 | "incl %%ecx \n\t"
|
|---|
| 4515 | "cmpl _dif, %%ecx \n\t"
|
|---|
| 4516 | "jb sub_lp1 \n\t"
|
|---|
| 4517 |
|
|---|
| 4518 | "sub_go: \n\t"
|
|---|
| 4519 | "movl _FullLength, %%eax \n\t"
|
|---|
| 4520 | "movl %%eax, %%edx \n\t"
|
|---|
| 4521 | "subl %%ecx, %%edx \n\t" // subtract alignment fix
|
|---|
| 4522 | "andl $0x00000007, %%edx \n\t" // calc bytes over mult of 8
|
|---|
| 4523 | "subl %%edx, %%eax \n\t" // drop over bytes from length
|
|---|
| 4524 | "movl %%eax, _MMXLength \n\t"
|
|---|
| 4525 |
|
|---|
| 4526 | : "=a" (dummy_value_a), // 0 // output regs (dummy)
|
|---|
| 4527 | "=D" (dummy_value_D) // 1
|
|---|
| 4528 |
|
|---|
| 4529 | : "0" (bpp), // eax // input regs
|
|---|
| 4530 | "1" (row) // edi
|
|---|
| 4531 |
|
|---|
| 4532 | : "%ebx", "%ecx", "%edx" // clobber list
|
|---|
| 4533 | , "%esi"
|
|---|
| 4534 |
|
|---|
| 4535 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 4536 | , "%mm0", "%mm1", "%mm2", "%mm3"
|
|---|
| 4537 | , "%mm4", "%mm5", "%mm6", "%mm7"
|
|---|
| 4538 | #endif
|
|---|
| 4539 | );
|
|---|
| 4540 |
|
|---|
| 4541 | // now do the math for the rest of the row
|
|---|
| 4542 | switch (bpp)
|
|---|
| 4543 | {
|
|---|
| 4544 | case 3:
|
|---|
| 4545 | {
|
|---|
| 4546 | _ActiveMask.use = 0x0000ffffff000000LL;
|
|---|
| 4547 | _ShiftBpp.use = 24; // == 3 * 8
|
|---|
| 4548 | _ShiftRem.use = 40; // == 64 - 24
|
|---|
| 4549 |
|
|---|
| 4550 | __asm__ __volatile__ (
|
|---|
| 4551 | // preload "movl row, %%edi \n\t"
|
|---|
| 4552 | "movq _ActiveMask, %%mm7 \n\t" // load _ActiveMask for 2nd
|
|---|
| 4553 | // active byte group
|
|---|
| 4554 | "movl %%edi, %%esi \n\t" // lp = row
|
|---|
| 4555 | // preload "movl bpp, %%eax \n\t"
|
|---|
| 4556 | "addl %%eax, %%edi \n\t" // rp = row + bpp
|
|---|
| 4557 | "movq %%mm7, %%mm6 \n\t"
|
|---|
| 4558 | "movl _dif, %%edx \n\t"
|
|---|
| 4559 | "psllq _ShiftBpp, %%mm6 \n\t" // move mask in mm6 to cover
|
|---|
| 4560 | // 3rd active byte group
|
|---|
| 4561 | // prime the pump: load the first Raw(x-bpp) data set
|
|---|
| 4562 | "movq -8(%%edi,%%edx,), %%mm1 \n\t"
|
|---|
| 4563 |
|
|---|
| 4564 | "sub_3lp: \n\t" // shift data for adding first
|
|---|
| 4565 | "psrlq _ShiftRem, %%mm1 \n\t" // bpp bytes (no need for mask;
|
|---|
| 4566 | // shift clears inactive bytes)
|
|---|
| 4567 | // add 1st active group
|
|---|
| 4568 | "movq (%%edi,%%edx,), %%mm0 \n\t"
|
|---|
| 4569 | "paddb %%mm1, %%mm0 \n\t"
|
|---|
| 4570 |
|
|---|
| 4571 | // add 2nd active group
|
|---|
| 4572 | "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1
|
|---|
| 4573 | "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly
|
|---|
| 4574 | "pand %%mm7, %%mm1 \n\t" // mask to use 2nd active group
|
|---|
| 4575 | "paddb %%mm1, %%mm0 \n\t"
|
|---|
| 4576 |
|
|---|
| 4577 | // add 3rd active group
|
|---|
| 4578 | "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1
|
|---|
| 4579 | "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly
|
|---|
| 4580 | "pand %%mm6, %%mm1 \n\t" // mask to use 3rd active group
|
|---|
| 4581 | "addl $8, %%edx \n\t"
|
|---|
| 4582 | "paddb %%mm1, %%mm0 \n\t"
|
|---|
| 4583 |
|
|---|
| 4584 | "cmpl _MMXLength, %%edx \n\t"
|
|---|
| 4585 | "movq %%mm0, -8(%%edi,%%edx,) \n\t" // write updated Raws to array
|
|---|
| 4586 | "movq %%mm0, %%mm1 \n\t" // prep 1st add at top of loop
|
|---|
| 4587 | "jb sub_3lp \n\t"
|
|---|
| 4588 |
|
|---|
| 4589 | : "=a" (dummy_value_a), // 0 // output regs (dummy)
|
|---|
| 4590 | "=D" (dummy_value_D) // 1
|
|---|
| 4591 |
|
|---|
| 4592 | : "0" (bpp), // eax // input regs
|
|---|
| 4593 | "1" (row) // edi
|
|---|
| 4594 |
|
|---|
| 4595 | : "%edx", "%esi" // clobber list
|
|---|
| 4596 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 4597 | , "%mm0", "%mm1", "%mm6", "%mm7"
|
|---|
| 4598 | #endif
|
|---|
| 4599 | );
|
|---|
| 4600 | }
|
|---|
| 4601 | break;
|
|---|
| 4602 |
|
|---|
| 4603 | case 1:
|
|---|
| 4604 | {
|
|---|
| 4605 | __asm__ __volatile__ (
|
|---|
| 4606 | "movl _dif, %%edx \n\t"
|
|---|
| 4607 | // preload "movl row, %%edi \n\t"
|
|---|
| 4608 | "cmpl _FullLength, %%edx \n\t"
|
|---|
| 4609 | "jnb sub_1end \n\t"
|
|---|
| 4610 | "movl %%edi, %%esi \n\t" // lp = row
|
|---|
| 4611 | "xorl %%eax, %%eax \n\t"
|
|---|
| 4612 | // preload "movl bpp, %%eax \n\t"
|
|---|
| 4613 | "addl %%eax, %%edi \n\t" // rp = row + bpp
|
|---|
| 4614 |
|
|---|
| 4615 | "sub_1lp: \n\t"
|
|---|
| 4616 | "movb (%%esi,%%edx,), %%al \n\t"
|
|---|
| 4617 | "addb %%al, (%%edi,%%edx,) \n\t"
|
|---|
| 4618 | "incl %%edx \n\t"
|
|---|
| 4619 | "cmpl _FullLength, %%edx \n\t"
|
|---|
| 4620 | "jb sub_1lp \n\t"
|
|---|
| 4621 |
|
|---|
| 4622 | "sub_1end: \n\t"
|
|---|
| 4623 |
|
|---|
| 4624 | : "=a" (dummy_value_a), // 0 // output regs (dummy)
|
|---|
| 4625 | "=D" (dummy_value_D) // 1
|
|---|
| 4626 |
|
|---|
| 4627 | : "0" (bpp), // eax // input regs
|
|---|
| 4628 | "1" (row) // edi
|
|---|
| 4629 |
|
|---|
| 4630 | : "%edx", "%esi" // clobber list
|
|---|
| 4631 | );
|
|---|
| 4632 | }
|
|---|
| 4633 | return;
|
|---|
| 4634 |
|
|---|
| 4635 | case 6:
|
|---|
| 4636 | case 4:
|
|---|
| 4637 | //case 7: // GRR BOGUS
|
|---|
| 4638 | //case 5: // GRR BOGUS
|
|---|
| 4639 | {
|
|---|
| 4640 | _ShiftBpp.use = bpp << 3;
|
|---|
| 4641 | _ShiftRem.use = 64 - _ShiftBpp.use;
|
|---|
| 4642 |
|
|---|
| 4643 | __asm__ __volatile__ (
|
|---|
| 4644 | // preload "movl row, %%edi \n\t"
|
|---|
| 4645 | "movl _dif, %%edx \n\t"
|
|---|
| 4646 | "movl %%edi, %%esi \n\t" // lp = row
|
|---|
| 4647 | // preload "movl bpp, %%eax \n\t"
|
|---|
| 4648 | "addl %%eax, %%edi \n\t" // rp = row + bpp
|
|---|
| 4649 |
|
|---|
| 4650 | // prime the pump: load the first Raw(x-bpp) data set
|
|---|
| 4651 | "movq -8(%%edi,%%edx,), %%mm1 \n\t"
|
|---|
| 4652 |
|
|---|
| 4653 | "sub_4lp: \n\t" // shift data for adding first
|
|---|
| 4654 | "psrlq _ShiftRem, %%mm1 \n\t" // bpp bytes (no need for mask;
|
|---|
| 4655 | // shift clears inactive bytes)
|
|---|
| 4656 | "movq (%%edi,%%edx,), %%mm0 \n\t"
|
|---|
| 4657 | "paddb %%mm1, %%mm0 \n\t"
|
|---|
| 4658 |
|
|---|
| 4659 | // add 2nd active group
|
|---|
| 4660 | "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1
|
|---|
| 4661 | "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly
|
|---|
| 4662 | "addl $8, %%edx \n\t"
|
|---|
| 4663 | "paddb %%mm1, %%mm0 \n\t"
|
|---|
| 4664 |
|
|---|
| 4665 | "cmpl _MMXLength, %%edx \n\t"
|
|---|
| 4666 | "movq %%mm0, -8(%%edi,%%edx,) \n\t"
|
|---|
| 4667 | "movq %%mm0, %%mm1 \n\t" // prep 1st add at top of loop
|
|---|
| 4668 | "jb sub_4lp \n\t"
|
|---|
| 4669 |
|
|---|
| 4670 | : "=a" (dummy_value_a), // 0 // output regs (dummy)
|
|---|
| 4671 | "=D" (dummy_value_D) // 1
|
|---|
| 4672 |
|
|---|
| 4673 | : "0" (bpp), // eax // input regs
|
|---|
| 4674 | "1" (row) // edi
|
|---|
| 4675 |
|
|---|
| 4676 | : "%edx", "%esi" // clobber list
|
|---|
| 4677 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 4678 | , "%mm0", "%mm1"
|
|---|
| 4679 | #endif
|
|---|
| 4680 | );
|
|---|
| 4681 | }
|
|---|
| 4682 | break;
|
|---|
| 4683 |
|
|---|
| 4684 | case 2:
|
|---|
| 4685 | {
|
|---|
| 4686 | _ActiveMask.use = 0x00000000ffff0000LL;
|
|---|
| 4687 | _ShiftBpp.use = 16; // == 2 * 8
|
|---|
| 4688 | _ShiftRem.use = 48; // == 64 - 16
|
|---|
| 4689 |
|
|---|
| 4690 | __asm__ __volatile__ (
|
|---|
| 4691 | "movq _ActiveMask, %%mm7 \n\t" // load _ActiveMask for 2nd
|
|---|
| 4692 | // active byte group
|
|---|
| 4693 | "movl _dif, %%edx \n\t"
|
|---|
| 4694 | "movq %%mm7, %%mm6 \n\t"
|
|---|
| 4695 | // preload "movl row, %%edi \n\t"
|
|---|
| 4696 | "psllq _ShiftBpp, %%mm6 \n\t" // move mask in mm6 to cover
|
|---|
| 4697 | // 3rd active byte group
|
|---|
| 4698 | "movl %%edi, %%esi \n\t" // lp = row
|
|---|
| 4699 | "movq %%mm6, %%mm5 \n\t"
|
|---|
| 4700 | // preload "movl bpp, %%eax \n\t"
|
|---|
| 4701 | "addl %%eax, %%edi \n\t" // rp = row + bpp
|
|---|
| 4702 | "psllq _ShiftBpp, %%mm5 \n\t" // move mask in mm5 to cover
|
|---|
| 4703 | // 4th active byte group
|
|---|
| 4704 | // prime the pump: load the first Raw(x-bpp) data set
|
|---|
| 4705 | "movq -8(%%edi,%%edx,), %%mm1 \n\t"
|
|---|
| 4706 |
|
|---|
| 4707 | "sub_2lp: \n\t" // shift data for adding first
|
|---|
| 4708 | "psrlq _ShiftRem, %%mm1 \n\t" // bpp bytes (no need for mask;
|
|---|
| 4709 | // shift clears inactive bytes)
|
|---|
| 4710 | // add 1st active group
|
|---|
| 4711 | "movq (%%edi,%%edx,), %%mm0 \n\t"
|
|---|
| 4712 | "paddb %%mm1, %%mm0 \n\t"
|
|---|
| 4713 |
|
|---|
| 4714 | // add 2nd active group
|
|---|
| 4715 | "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1
|
|---|
| 4716 | "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly
|
|---|
| 4717 | "pand %%mm7, %%mm1 \n\t" // mask to use 2nd active group
|
|---|
| 4718 | "paddb %%mm1, %%mm0 \n\t"
|
|---|
| 4719 |
|
|---|
| 4720 | // add 3rd active group
|
|---|
| 4721 | "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1
|
|---|
| 4722 | "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly
|
|---|
| 4723 | "pand %%mm6, %%mm1 \n\t" // mask to use 3rd active group
|
|---|
| 4724 | "paddb %%mm1, %%mm0 \n\t"
|
|---|
| 4725 |
|
|---|
| 4726 | // add 4th active group
|
|---|
| 4727 | "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1
|
|---|
| 4728 | "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly
|
|---|
| 4729 | "pand %%mm5, %%mm1 \n\t" // mask to use 4th active group
|
|---|
| 4730 | "addl $8, %%edx \n\t"
|
|---|
| 4731 | "paddb %%mm1, %%mm0 \n\t"
|
|---|
| 4732 | "cmpl _MMXLength, %%edx \n\t"
|
|---|
| 4733 | "movq %%mm0, -8(%%edi,%%edx,) \n\t" // write updated Raws to array
|
|---|
| 4734 | "movq %%mm0, %%mm1 \n\t" // prep 1st add at top of loop
|
|---|
| 4735 | "jb sub_2lp \n\t"
|
|---|
| 4736 |
|
|---|
| 4737 | : "=a" (dummy_value_a), // 0 // output regs (dummy)
|
|---|
| 4738 | "=D" (dummy_value_D) // 1
|
|---|
| 4739 |
|
|---|
| 4740 | : "0" (bpp), // eax // input regs
|
|---|
| 4741 | "1" (row) // edi
|
|---|
| 4742 |
|
|---|
| 4743 | : "%edx", "%esi" // clobber list
|
|---|
| 4744 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 4745 | , "%mm0", "%mm1", "%mm5", "%mm6", "%mm7"
|
|---|
| 4746 | #endif
|
|---|
| 4747 | );
|
|---|
| 4748 | }
|
|---|
| 4749 | break;
|
|---|
| 4750 |
|
|---|
| 4751 | case 8:
|
|---|
| 4752 | {
|
|---|
| 4753 | __asm__ __volatile__ (
|
|---|
| 4754 | // preload "movl row, %%edi \n\t"
|
|---|
| 4755 | "movl _dif, %%edx \n\t"
|
|---|
| 4756 | "movl %%edi, %%esi \n\t" // lp = row
|
|---|
| 4757 | // preload "movl bpp, %%eax \n\t"
|
|---|
| 4758 | "addl %%eax, %%edi \n\t" // rp = row + bpp
|
|---|
| 4759 | "movl _MMXLength, %%ecx \n\t"
|
|---|
| 4760 |
|
|---|
| 4761 | // prime the pump: load the first Raw(x-bpp) data set
|
|---|
| 4762 | "movq -8(%%edi,%%edx,), %%mm7 \n\t"
|
|---|
| 4763 | "andl $0x0000003f, %%ecx \n\t" // calc bytes over mult of 64
|
|---|
| 4764 |
|
|---|
| 4765 | "sub_8lp: \n\t"
|
|---|
| 4766 | "movq (%%edi,%%edx,), %%mm0 \n\t" // load Sub(x) for 1st 8 bytes
|
|---|
| 4767 | "paddb %%mm7, %%mm0 \n\t"
|
|---|
| 4768 | "movq 8(%%edi,%%edx,), %%mm1 \n\t" // load Sub(x) for 2nd 8 bytes
|
|---|
| 4769 | "movq %%mm0, (%%edi,%%edx,) \n\t" // write Raw(x) for 1st 8 bytes
|
|---|
| 4770 |
|
|---|
| 4771 | // Now mm0 will be used as Raw(x-bpp) for the 2nd group of 8 bytes.
|
|---|
| 4772 | // This will be repeated for each group of 8 bytes with the 8th
|
|---|
| 4773 | // group being used as the Raw(x-bpp) for the 1st group of the
|
|---|
| 4774 | // next loop.
|
|---|
| 4775 |
|
|---|
| 4776 | "paddb %%mm0, %%mm1 \n\t"
|
|---|
| 4777 | "movq 16(%%edi,%%edx,), %%mm2 \n\t" // load Sub(x) for 3rd 8 bytes
|
|---|
| 4778 | "movq %%mm1, 8(%%edi,%%edx,) \n\t" // write Raw(x) for 2nd 8 bytes
|
|---|
| 4779 | "paddb %%mm1, %%mm2 \n\t"
|
|---|
| 4780 | "movq 24(%%edi,%%edx,), %%mm3 \n\t" // load Sub(x) for 4th 8 bytes
|
|---|
| 4781 | "movq %%mm2, 16(%%edi,%%edx,) \n\t" // write Raw(x) for 3rd 8 bytes
|
|---|
| 4782 | "paddb %%mm2, %%mm3 \n\t"
|
|---|
| 4783 | "movq 32(%%edi,%%edx,), %%mm4 \n\t" // load Sub(x) for 5th 8 bytes
|
|---|
| 4784 | "movq %%mm3, 24(%%edi,%%edx,) \n\t" // write Raw(x) for 4th 8 bytes
|
|---|
| 4785 | "paddb %%mm3, %%mm4 \n\t"
|
|---|
| 4786 | "movq 40(%%edi,%%edx,), %%mm5 \n\t" // load Sub(x) for 6th 8 bytes
|
|---|
| 4787 | "movq %%mm4, 32(%%edi,%%edx,) \n\t" // write Raw(x) for 5th 8 bytes
|
|---|
| 4788 | "paddb %%mm4, %%mm5 \n\t"
|
|---|
| 4789 | "movq 48(%%edi,%%edx,), %%mm6 \n\t" // load Sub(x) for 7th 8 bytes
|
|---|
| 4790 | "movq %%mm5, 40(%%edi,%%edx,) \n\t" // write Raw(x) for 6th 8 bytes
|
|---|
| 4791 | "paddb %%mm5, %%mm6 \n\t"
|
|---|
| 4792 | "movq 56(%%edi,%%edx,), %%mm7 \n\t" // load Sub(x) for 8th 8 bytes
|
|---|
| 4793 | "movq %%mm6, 48(%%edi,%%edx,) \n\t" // write Raw(x) for 7th 8 bytes
|
|---|
| 4794 | "addl $64, %%edx \n\t"
|
|---|
| 4795 | "paddb %%mm6, %%mm7 \n\t"
|
|---|
| 4796 | "cmpl %%ecx, %%edx \n\t"
|
|---|
| 4797 | "movq %%mm7, -8(%%edi,%%edx,) \n\t" // write Raw(x) for 8th 8 bytes
|
|---|
| 4798 | "jb sub_8lp \n\t"
|
|---|
| 4799 |
|
|---|
| 4800 | "cmpl _MMXLength, %%edx \n\t"
|
|---|
| 4801 | "jnb sub_8lt8 \n\t"
|
|---|
| 4802 |
|
|---|
| 4803 | "sub_8lpA: \n\t"
|
|---|
| 4804 | "movq (%%edi,%%edx,), %%mm0 \n\t"
|
|---|
| 4805 | "addl $8, %%edx \n\t"
|
|---|
| 4806 | "paddb %%mm7, %%mm0 \n\t"
|
|---|
| 4807 | "cmpl _MMXLength, %%edx \n\t"
|
|---|
| 4808 | "movq %%mm0, -8(%%edi,%%edx,) \n\t" // -8 to offset early addl edx
|
|---|
| 4809 | "movq %%mm0, %%mm7 \n\t" // move calculated Raw(x) data
|
|---|
| 4810 | // to mm1 to be new Raw(x-bpp)
|
|---|
| 4811 | // for next loop
|
|---|
| 4812 | "jb sub_8lpA \n\t"
|
|---|
| 4813 |
|
|---|
| 4814 | "sub_8lt8: \n\t"
|
|---|
| 4815 |
|
|---|
| 4816 | : "=a" (dummy_value_a), // 0 // output regs (dummy)
|
|---|
| 4817 | "=D" (dummy_value_D) // 1
|
|---|
| 4818 |
|
|---|
| 4819 | : "0" (bpp), // eax // input regs
|
|---|
| 4820 | "1" (row) // edi
|
|---|
| 4821 |
|
|---|
| 4822 | : "%ecx", "%edx", "%esi" // clobber list
|
|---|
| 4823 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 4824 | , "%mm0", "%mm1", "%mm2", "%mm3", "%mm4", "%mm5", "%mm6", "%mm7"
|
|---|
| 4825 | #endif
|
|---|
| 4826 | );
|
|---|
| 4827 | }
|
|---|
| 4828 | break;
|
|---|
| 4829 |
|
|---|
| 4830 | default: // bpp greater than 8 bytes GRR BOGUS
|
|---|
| 4831 | {
|
|---|
| 4832 | __asm__ __volatile__ (
|
|---|
| 4833 | "movl _dif, %%edx \n\t"
|
|---|
| 4834 | // preload "movl row, %%edi \n\t"
|
|---|
| 4835 | "movl %%edi, %%esi \n\t" // lp = row
|
|---|
| 4836 | // preload "movl bpp, %%eax \n\t"
|
|---|
| 4837 | "addl %%eax, %%edi \n\t" // rp = row + bpp
|
|---|
| 4838 |
|
|---|
| 4839 | "sub_Alp: \n\t"
|
|---|
| 4840 | "movq (%%edi,%%edx,), %%mm0 \n\t"
|
|---|
| 4841 | "movq (%%esi,%%edx,), %%mm1 \n\t"
|
|---|
| 4842 | "addl $8, %%edx \n\t"
|
|---|
| 4843 | "paddb %%mm1, %%mm0 \n\t"
|
|---|
| 4844 | "cmpl _MMXLength, %%edx \n\t"
|
|---|
| 4845 | "movq %%mm0, -8(%%edi,%%edx,) \n\t" // mov does not affect flags;
|
|---|
| 4846 | // -8 to offset addl edx
|
|---|
| 4847 | "jb sub_Alp \n\t"
|
|---|
| 4848 |
|
|---|
| 4849 | : "=a" (dummy_value_a), // 0 // output regs (dummy)
|
|---|
| 4850 | "=D" (dummy_value_D) // 1
|
|---|
| 4851 |
|
|---|
| 4852 | : "0" (bpp), // eax // input regs
|
|---|
| 4853 | "1" (row) // edi
|
|---|
| 4854 |
|
|---|
| 4855 | : "%edx", "%esi" // clobber list
|
|---|
| 4856 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 4857 | , "%mm0", "%mm1"
|
|---|
| 4858 | #endif
|
|---|
| 4859 | );
|
|---|
| 4860 | }
|
|---|
| 4861 | break;
|
|---|
| 4862 |
|
|---|
| 4863 | } // end switch (bpp)
|
|---|
| 4864 |
|
|---|
| 4865 | __asm__ __volatile__ (
|
|---|
| 4866 | "movl _MMXLength, %%edx \n\t"
|
|---|
| 4867 | //pre "movl row, %%edi \n\t"
|
|---|
| 4868 | "cmpl _FullLength, %%edx \n\t"
|
|---|
| 4869 | "jnb sub_end \n\t"
|
|---|
| 4870 |
|
|---|
| 4871 | "movl %%edi, %%esi \n\t" // lp = row
|
|---|
| 4872 | //pre "movl bpp, %%eax \n\t"
|
|---|
| 4873 | "addl %%eax, %%edi \n\t" // rp = row + bpp
|
|---|
| 4874 | "xorl %%eax, %%eax \n\t"
|
|---|
| 4875 |
|
|---|
| 4876 | "sub_lp2: \n\t"
|
|---|
| 4877 | "movb (%%esi,%%edx,), %%al \n\t"
|
|---|
| 4878 | "addb %%al, (%%edi,%%edx,) \n\t"
|
|---|
| 4879 | "incl %%edx \n\t"
|
|---|
| 4880 | "cmpl _FullLength, %%edx \n\t"
|
|---|
| 4881 | "jb sub_lp2 \n\t"
|
|---|
| 4882 |
|
|---|
| 4883 | "sub_end: \n\t"
|
|---|
| 4884 | "EMMS \n\t" // end MMX instructions
|
|---|
| 4885 |
|
|---|
| 4886 | : "=a" (dummy_value_a), // 0 // output regs (dummy)
|
|---|
| 4887 | "=D" (dummy_value_D) // 1
|
|---|
| 4888 |
|
|---|
| 4889 | : "0" (bpp), // eax // input regs
|
|---|
| 4890 | "1" (row) // edi
|
|---|
| 4891 |
|
|---|
| 4892 | : "%edx", "%esi" // clobber list
|
|---|
| 4893 | );
|
|---|
| 4894 |
|
|---|
| 4895 | } // end of png_read_filter_row_mmx_sub()
|
|---|
| 4896 | #endif
|
|---|
| 4897 |
|
|---|
| 4898 |
|
|---|
| 4899 |
|
|---|
| 4900 |
|
|---|
| 4901 | //===========================================================================//
|
|---|
| 4902 | // //
|
|---|
| 4903 | // P N G _ R E A D _ F I L T E R _ R O W _ M M X _ U P //
|
|---|
| 4904 | // //
|
|---|
| 4905 | //===========================================================================//
|
|---|
| 4906 |
|
|---|
| 4907 | // Optimized code for PNG Up filter decoder
|
|---|
| 4908 |
|
|---|
| 4909 | static void /* PRIVATE */
|
|---|
| 4910 | png_read_filter_row_mmx_up(png_row_infop row_info, png_bytep row,
|
|---|
| 4911 | png_bytep prev_row)
|
|---|
| 4912 | {
|
|---|
| 4913 | png_uint_32 len;
|
|---|
| 4914 | int dummy_value_d; // fix 'forbidden register 3 (dx) was spilled' error
|
|---|
| 4915 | int dummy_value_S;
|
|---|
| 4916 | int dummy_value_D;
|
|---|
| 4917 |
|
|---|
| 4918 | len = row_info->rowbytes; // number of bytes to filter
|
|---|
| 4919 |
|
|---|
| 4920 | __asm__ __volatile__ (
|
|---|
| 4921 | //pre "movl row, %%edi \n\t"
|
|---|
| 4922 | // get # of bytes to alignment
|
|---|
| 4923 | #ifdef __PIC__
|
|---|
| 4924 | "pushl %%ebx \n\t"
|
|---|
| 4925 | #endif
|
|---|
| 4926 | "movl %%edi, %%ecx \n\t"
|
|---|
| 4927 | "xorl %%ebx, %%ebx \n\t"
|
|---|
| 4928 | "addl $0x7, %%ecx \n\t"
|
|---|
| 4929 | "xorl %%eax, %%eax \n\t"
|
|---|
| 4930 | "andl $0xfffffff8, %%ecx \n\t"
|
|---|
| 4931 | //pre "movl prev_row, %%esi \n\t"
|
|---|
| 4932 | "subl %%edi, %%ecx \n\t"
|
|---|
| 4933 | "jz up_go \n\t"
|
|---|
| 4934 |
|
|---|
| 4935 | "up_lp1: \n\t" // fix alignment
|
|---|
| 4936 | "movb (%%edi,%%ebx,), %%al \n\t"
|
|---|
| 4937 | "addb (%%esi,%%ebx,), %%al \n\t"
|
|---|
| 4938 | "incl %%ebx \n\t"
|
|---|
| 4939 | "cmpl %%ecx, %%ebx \n\t"
|
|---|
| 4940 | "movb %%al, -1(%%edi,%%ebx,) \n\t" // mov does not affect flags; -1 to
|
|---|
| 4941 | "jb up_lp1 \n\t" // offset incl ebx
|
|---|
| 4942 |
|
|---|
| 4943 | "up_go: \n\t"
|
|---|
| 4944 | //pre "movl len, %%edx \n\t"
|
|---|
| 4945 | "movl %%edx, %%ecx \n\t"
|
|---|
| 4946 | "subl %%ebx, %%edx \n\t" // subtract alignment fix
|
|---|
| 4947 | "andl $0x0000003f, %%edx \n\t" // calc bytes over mult of 64
|
|---|
| 4948 | "subl %%edx, %%ecx \n\t" // drop over bytes from length
|
|---|
| 4949 |
|
|---|
| 4950 | // unrolled loop - use all MMX registers and interleave to reduce
|
|---|
| 4951 | // number of branch instructions (loops) and reduce partial stalls
|
|---|
| 4952 | "up_loop: \n\t"
|
|---|
| 4953 | "movq (%%esi,%%ebx,), %%mm1 \n\t"
|
|---|
| 4954 | "movq (%%edi,%%ebx,), %%mm0 \n\t"
|
|---|
| 4955 | "movq 8(%%esi,%%ebx,), %%mm3 \n\t"
|
|---|
| 4956 | "paddb %%mm1, %%mm0 \n\t"
|
|---|
| 4957 | "movq 8(%%edi,%%ebx,), %%mm2 \n\t"
|
|---|
| 4958 | "movq %%mm0, (%%edi,%%ebx,) \n\t"
|
|---|
| 4959 | "paddb %%mm3, %%mm2 \n\t"
|
|---|
| 4960 | "movq 16(%%esi,%%ebx,), %%mm5 \n\t"
|
|---|
| 4961 | "movq %%mm2, 8(%%edi,%%ebx,) \n\t"
|
|---|
| 4962 | "movq 16(%%edi,%%ebx,), %%mm4 \n\t"
|
|---|
| 4963 | "movq 24(%%esi,%%ebx,), %%mm7 \n\t"
|
|---|
| 4964 | "paddb %%mm5, %%mm4 \n\t"
|
|---|
| 4965 | "movq 24(%%edi,%%ebx,), %%mm6 \n\t"
|
|---|
| 4966 | "movq %%mm4, 16(%%edi,%%ebx,) \n\t"
|
|---|
| 4967 | "paddb %%mm7, %%mm6 \n\t"
|
|---|
| 4968 | "movq 32(%%esi,%%ebx,), %%mm1 \n\t"
|
|---|
| 4969 | "movq %%mm6, 24(%%edi,%%ebx,) \n\t"
|
|---|
| 4970 | "movq 32(%%edi,%%ebx,), %%mm0 \n\t"
|
|---|
| 4971 | "movq 40(%%esi,%%ebx,), %%mm3 \n\t"
|
|---|
| 4972 | "paddb %%mm1, %%mm0 \n\t"
|
|---|
| 4973 | "movq 40(%%edi,%%ebx,), %%mm2 \n\t"
|
|---|
| 4974 | "movq %%mm0, 32(%%edi,%%ebx,) \n\t"
|
|---|
| 4975 | "paddb %%mm3, %%mm2 \n\t"
|
|---|
| 4976 | "movq 48(%%esi,%%ebx,), %%mm5 \n\t"
|
|---|
| 4977 | "movq %%mm2, 40(%%edi,%%ebx,) \n\t"
|
|---|
| 4978 | "movq 48(%%edi,%%ebx,), %%mm4 \n\t"
|
|---|
| 4979 | "movq 56(%%esi,%%ebx,), %%mm7 \n\t"
|
|---|
| 4980 | "paddb %%mm5, %%mm4 \n\t"
|
|---|
| 4981 | "movq 56(%%edi,%%ebx,), %%mm6 \n\t"
|
|---|
| 4982 | "movq %%mm4, 48(%%edi,%%ebx,) \n\t"
|
|---|
| 4983 | "addl $64, %%ebx \n\t"
|
|---|
| 4984 | "paddb %%mm7, %%mm6 \n\t"
|
|---|
| 4985 | "cmpl %%ecx, %%ebx \n\t"
|
|---|
| 4986 | "movq %%mm6, -8(%%edi,%%ebx,) \n\t" // (+56)movq does not affect flags;
|
|---|
| 4987 | "jb up_loop \n\t" // -8 to offset addl ebx
|
|---|
| 4988 |
|
|---|
| 4989 | "cmpl $0, %%edx \n\t" // test for bytes over mult of 64
|
|---|
| 4990 | "jz up_end \n\t"
|
|---|
| 4991 |
|
|---|
| 4992 | "cmpl $8, %%edx \n\t" // test for less than 8 bytes
|
|---|
| 4993 | "jb up_lt8 \n\t" // [added by lcreeve@netins.net]
|
|---|
| 4994 |
|
|---|
| 4995 | "addl %%edx, %%ecx \n\t"
|
|---|
| 4996 | "andl $0x00000007, %%edx \n\t" // calc bytes over mult of 8
|
|---|
| 4997 | "subl %%edx, %%ecx \n\t" // drop over bytes from length
|
|---|
| 4998 | "jz up_lt8 \n\t"
|
|---|
| 4999 |
|
|---|
| 5000 | "up_lpA: \n\t" // use MMX regs to update 8 bytes sim.
|
|---|
| 5001 | "movq (%%esi,%%ebx,), %%mm1 \n\t"
|
|---|
| 5002 | "movq (%%edi,%%ebx,), %%mm0 \n\t"
|
|---|
| 5003 | "addl $8, %%ebx \n\t"
|
|---|
| 5004 | "paddb %%mm1, %%mm0 \n\t"
|
|---|
| 5005 | "cmpl %%ecx, %%ebx \n\t"
|
|---|
| 5006 | "movq %%mm0, -8(%%edi,%%ebx,) \n\t" // movq does not affect flags; -8 to
|
|---|
| 5007 | "jb up_lpA \n\t" // offset add ebx
|
|---|
| 5008 | "cmpl $0, %%edx \n\t" // test for bytes over mult of 8
|
|---|
| 5009 | "jz up_end \n\t"
|
|---|
| 5010 |
|
|---|
| 5011 | "up_lt8: \n\t"
|
|---|
| 5012 | "xorl %%eax, %%eax \n\t"
|
|---|
| 5013 | "addl %%edx, %%ecx \n\t" // move over byte count into counter
|
|---|
| 5014 |
|
|---|
| 5015 | "up_lp2: \n\t" // use x86 regs for remaining bytes
|
|---|
| 5016 | "movb (%%edi,%%ebx,), %%al \n\t"
|
|---|
| 5017 | "addb (%%esi,%%ebx,), %%al \n\t"
|
|---|
| 5018 | "incl %%ebx \n\t"
|
|---|
| 5019 | "cmpl %%ecx, %%ebx \n\t"
|
|---|
| 5020 | "movb %%al, -1(%%edi,%%ebx,) \n\t" // mov does not affect flags; -1 to
|
|---|
| 5021 | "jb up_lp2 \n\t" // offset inc ebx
|
|---|
| 5022 |
|
|---|
| 5023 | "up_end: \n\t"
|
|---|
| 5024 | "EMMS \n\t" // conversion of filtered row complete
|
|---|
| 5025 | #ifdef __PIC__
|
|---|
| 5026 | "popl %%ebx \n\t"
|
|---|
| 5027 | #endif
|
|---|
| 5028 |
|
|---|
| 5029 | : "=d" (dummy_value_d), // 0 // output regs (dummy)
|
|---|
| 5030 | "=S" (dummy_value_S), // 1
|
|---|
| 5031 | "=D" (dummy_value_D) // 2
|
|---|
| 5032 |
|
|---|
| 5033 | : "0" (len), // edx // input regs
|
|---|
| 5034 | "1" (prev_row), // esi
|
|---|
| 5035 | "2" (row) // edi
|
|---|
| 5036 |
|
|---|
| 5037 | : "%eax", "%ebx", "%ecx" // clobber list (no input regs!)
|
|---|
| 5038 |
|
|---|
| 5039 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
|
|---|
| 5040 | , "%mm0", "%mm1", "%mm2", "%mm3"
|
|---|
| 5041 | , "%mm4", "%mm5", "%mm6", "%mm7"
|
|---|
| 5042 | #endif
|
|---|
| 5043 | );
|
|---|
| 5044 |
|
|---|
| 5045 | } // end of png_read_filter_row_mmx_up()
|
|---|
| 5046 |
|
|---|
| 5047 | #endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|---|
| 5048 |
|
|---|
| 5049 |
|
|---|
| 5050 |
|
|---|
| 5051 |
|
|---|
| 5052 | /*===========================================================================*/
|
|---|
| 5053 | /* */
|
|---|
| 5054 | /* P N G _ R E A D _ F I L T E R _ R O W */
|
|---|
| 5055 | /* */
|
|---|
| 5056 | /*===========================================================================*/
|
|---|
| 5057 |
|
|---|
| 5058 |
|
|---|
| 5059 | /* Optimized png_read_filter_row routines */
|
|---|
| 5060 |
|
|---|
| 5061 | void /* PRIVATE */
|
|---|
| 5062 | png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
|
|---|
| 5063 | row, png_bytep prev_row, int filter)
|
|---|
| 5064 | {
|
|---|
| 5065 | #ifdef PNG_DEBUG
|
|---|
| 5066 | char filnm[10];
|
|---|
| 5067 | #endif
|
|---|
| 5068 |
|
|---|
| 5069 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
|
|---|
| 5070 | /* GRR: these are superseded by png_ptr->asm_flags: */
|
|---|
| 5071 | #define UseMMX_sub 1 // GRR: converted 20000730
|
|---|
| 5072 | #define UseMMX_up 1 // GRR: converted 20000729
|
|---|
| 5073 | #define UseMMX_avg 1 // GRR: converted 20000828 (+ 16-bit bugfix 20000916)
|
|---|
| 5074 | #define UseMMX_paeth 1 // GRR: converted 20000828
|
|---|
| 5075 |
|
|---|
| 5076 | if (_mmx_supported == 2) {
|
|---|
| 5077 | /* this should have happened in png_init_mmx_flags() already */
|
|---|
| 5078 | #if !defined(PNG_1_0_X)
|
|---|
| 5079 | png_warning(png_ptr, "asm_flags may not have been initialized");
|
|---|
| 5080 | #endif
|
|---|
| 5081 | png_mmx_support();
|
|---|
| 5082 | }
|
|---|
| 5083 | #endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|---|
| 5084 |
|
|---|
| 5085 | #ifdef PNG_DEBUG
|
|---|
| 5086 | png_debug(1, "in png_read_filter_row (pnggccrd.c)\n");
|
|---|
| 5087 | switch (filter)
|
|---|
| 5088 | {
|
|---|
| 5089 | case 0: sprintf(filnm, "none");
|
|---|
| 5090 | break;
|
|---|
| 5091 | case 1: sprintf(filnm, "sub-%s",
|
|---|
| 5092 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|---|
| 5093 | #if !defined(PNG_1_0_X)
|
|---|
| 5094 | (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB)? "MMX" :
|
|---|
| 5095 | #endif
|
|---|
| 5096 | #endif
|
|---|
| 5097 | "x86");
|
|---|
| 5098 | break;
|
|---|
| 5099 | case 2: sprintf(filnm, "up-%s",
|
|---|
| 5100 | #ifdef PNG_ASSEMBLER_CODE_SUPPORTED
|
|---|
| 5101 | #if !defined(PNG_1_0_X)
|
|---|
| 5102 | (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP)? "MMX" :
|
|---|
| 5103 | #endif
|
|---|
| 5104 | #endif
|
|---|
| 5105 | "x86");
|
|---|
| 5106 | break;
|
|---|
| 5107 | case 3: sprintf(filnm, "avg-%s",
|
|---|
| 5108 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|---|
| 5109 | #if !defined(PNG_1_0_X)
|
|---|
| 5110 | (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG)? "MMX" :
|
|---|
| 5111 | #endif
|
|---|
| 5112 | #endif
|
|---|
| 5113 | "x86");
|
|---|
| 5114 | break;
|
|---|
| 5115 | case 4: sprintf(filnm, "Paeth-%s",
|
|---|
| 5116 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|---|
| 5117 | #if !defined(PNG_1_0_X)
|
|---|
| 5118 | (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH)? "MMX":
|
|---|
| 5119 | #endif
|
|---|
| 5120 | #endif
|
|---|
| 5121 | "x86");
|
|---|
| 5122 | break;
|
|---|
| 5123 | default: sprintf(filnm, "unknw");
|
|---|
| 5124 | break;
|
|---|
| 5125 | }
|
|---|
| 5126 | png_debug2(0, "row_number=%5ld, %5s, ", png_ptr->row_number, filnm);
|
|---|
| 5127 | png_debug1(0, "row=0x%08lx, ", (unsigned long)row);
|
|---|
| 5128 | png_debug2(0, "pixdepth=%2d, bytes=%d, ", (int)row_info->pixel_depth,
|
|---|
| 5129 | (int)((row_info->pixel_depth + 7) >> 3));
|
|---|
| 5130 | png_debug1(0,"rowbytes=%8ld\n", row_info->rowbytes);
|
|---|
| 5131 | #endif /* PNG_DEBUG */
|
|---|
| 5132 |
|
|---|
| 5133 | switch (filter)
|
|---|
| 5134 | {
|
|---|
| 5135 | case PNG_FILTER_VALUE_NONE:
|
|---|
| 5136 | break;
|
|---|
| 5137 |
|
|---|
| 5138 | case PNG_FILTER_VALUE_SUB:
|
|---|
| 5139 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|---|
| 5140 | #if !defined(PNG_1_0_X)
|
|---|
| 5141 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB) &&
|
|---|
| 5142 | (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
|
|---|
| 5143 | (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
|
|---|
| 5144 | #else
|
|---|
| 5145 | if (_mmx_supported)
|
|---|
| 5146 | #endif
|
|---|
| 5147 | {
|
|---|
| 5148 | png_read_filter_row_mmx_sub(row_info, row);
|
|---|
| 5149 | }
|
|---|
| 5150 | else
|
|---|
| 5151 | #endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|---|
| 5152 | {
|
|---|
| 5153 | png_uint_32 i;
|
|---|
| 5154 | png_uint_32 istop = row_info->rowbytes;
|
|---|
| 5155 | png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3;
|
|---|
| 5156 | png_bytep rp = row + bpp;
|
|---|
| 5157 | png_bytep lp = row;
|
|---|
| 5158 |
|
|---|
| 5159 | for (i = bpp; i < istop; i++)
|
|---|
| 5160 | {
|
|---|
| 5161 | *rp = (png_byte)(((int)(*rp) + (int)(*lp++)) & 0xff);
|
|---|
| 5162 | rp++;
|
|---|
| 5163 | }
|
|---|
| 5164 | } /* end !UseMMX_sub */
|
|---|
| 5165 | break;
|
|---|
| 5166 |
|
|---|
| 5167 | case PNG_FILTER_VALUE_UP:
|
|---|
| 5168 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
|
|---|
| 5169 | #if !defined(PNG_1_0_X)
|
|---|
| 5170 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP) &&
|
|---|
| 5171 | (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
|
|---|
| 5172 | (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
|
|---|
| 5173 | #else
|
|---|
| 5174 | if (_mmx_supported)
|
|---|
| 5175 | #endif
|
|---|
| 5176 | {
|
|---|
| 5177 | png_read_filter_row_mmx_up(row_info, row, prev_row);
|
|---|
| 5178 | }
|
|---|
| 5179 | else
|
|---|
| 5180 | #endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|---|
| 5181 | {
|
|---|
| 5182 | png_uint_32 i;
|
|---|
| 5183 | png_uint_32 istop = row_info->rowbytes;
|
|---|
| 5184 | png_bytep rp = row;
|
|---|
| 5185 | png_bytep pp = prev_row;
|
|---|
| 5186 |
|
|---|
| 5187 | for (i = 0; i < istop; ++i)
|
|---|
| 5188 | {
|
|---|
| 5189 | *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
|
|---|
| 5190 | rp++;
|
|---|
| 5191 | }
|
|---|
| 5192 | } /* end !UseMMX_up */
|
|---|
| 5193 | break;
|
|---|
| 5194 |
|
|---|
| 5195 | case PNG_FILTER_VALUE_AVG:
|
|---|
| 5196 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|---|
| 5197 | #if !defined(PNG_1_0_X)
|
|---|
| 5198 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG) &&
|
|---|
| 5199 | (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
|
|---|
| 5200 | (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
|
|---|
| 5201 | #else
|
|---|
| 5202 | if (_mmx_supported)
|
|---|
| 5203 | #endif
|
|---|
| 5204 | {
|
|---|
| 5205 | png_read_filter_row_mmx_avg(row_info, row, prev_row);
|
|---|
| 5206 | }
|
|---|
| 5207 | else
|
|---|
| 5208 | #endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|---|
| 5209 | {
|
|---|
| 5210 | png_uint_32 i;
|
|---|
| 5211 | png_bytep rp = row;
|
|---|
| 5212 | png_bytep pp = prev_row;
|
|---|
| 5213 | png_bytep lp = row;
|
|---|
| 5214 | png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3;
|
|---|
| 5215 | png_uint_32 istop = row_info->rowbytes - bpp;
|
|---|
| 5216 |
|
|---|
| 5217 | for (i = 0; i < bpp; i++)
|
|---|
| 5218 | {
|
|---|
| 5219 | *rp = (png_byte)(((int)(*rp) +
|
|---|
| 5220 | ((int)(*pp++) >> 1)) & 0xff);
|
|---|
| 5221 | rp++;
|
|---|
| 5222 | }
|
|---|
| 5223 |
|
|---|
| 5224 | for (i = 0; i < istop; i++)
|
|---|
| 5225 | {
|
|---|
| 5226 | *rp = (png_byte)(((int)(*rp) +
|
|---|
| 5227 | ((int)(*pp++ + *lp++) >> 1)) & 0xff);
|
|---|
| 5228 | rp++;
|
|---|
| 5229 | }
|
|---|
| 5230 | } /* end !UseMMX_avg */
|
|---|
| 5231 | break;
|
|---|
| 5232 |
|
|---|
| 5233 | case PNG_FILTER_VALUE_PAETH:
|
|---|
| 5234 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
|
|---|
| 5235 | #if !defined(PNG_1_0_X)
|
|---|
| 5236 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH) &&
|
|---|
| 5237 | (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
|
|---|
| 5238 | (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
|
|---|
| 5239 | #else
|
|---|
| 5240 | if (_mmx_supported)
|
|---|
| 5241 | #endif
|
|---|
| 5242 | {
|
|---|
| 5243 | png_read_filter_row_mmx_paeth(row_info, row, prev_row);
|
|---|
| 5244 | }
|
|---|
| 5245 | else
|
|---|
| 5246 | #endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
|
|---|
| 5247 | {
|
|---|
| 5248 | png_uint_32 i;
|
|---|
| 5249 | png_bytep rp = row;
|
|---|
| 5250 | png_bytep pp = prev_row;
|
|---|
| 5251 | png_bytep lp = row;
|
|---|
| 5252 | png_bytep cp = prev_row;
|
|---|
| 5253 | png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3;
|
|---|
| 5254 | png_uint_32 istop = row_info->rowbytes - bpp;
|
|---|
| 5255 |
|
|---|
| 5256 | for (i = 0; i < bpp; i++)
|
|---|
| 5257 | {
|
|---|
| 5258 | *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
|
|---|
| 5259 | rp++;
|
|---|
| 5260 | }
|
|---|
| 5261 |
|
|---|
| 5262 | for (i = 0; i < istop; i++) /* use leftover rp,pp */
|
|---|
| 5263 | {
|
|---|
| 5264 | int a, b, c, pa, pb, pc, p;
|
|---|
| 5265 |
|
|---|
| 5266 | a = *lp++;
|
|---|
| 5267 | b = *pp++;
|
|---|
| 5268 | c = *cp++;
|
|---|
| 5269 |
|
|---|
| 5270 | p = b - c;
|
|---|
| 5271 | pc = a - c;
|
|---|
| 5272 |
|
|---|
| 5273 | #ifdef PNG_USE_ABS
|
|---|
| 5274 | pa = abs(p);
|
|---|
| 5275 | pb = abs(pc);
|
|---|
| 5276 | pc = abs(p + pc);
|
|---|
| 5277 | #else
|
|---|
| 5278 | pa = p < 0 ? -p : p;
|
|---|
| 5279 | pb = pc < 0 ? -pc : pc;
|
|---|
| 5280 | pc = (p + pc) < 0 ? -(p + pc) : p + pc;
|
|---|
| 5281 | #endif
|
|---|
| 5282 |
|
|---|
| 5283 | /*
|
|---|
| 5284 | if (pa <= pb && pa <= pc)
|
|---|
| 5285 | p = a;
|
|---|
| 5286 | else if (pb <= pc)
|
|---|
| 5287 | p = b;
|
|---|
| 5288 | else
|
|---|
| 5289 | p = c;
|
|---|
| 5290 | */
|
|---|
| 5291 |
|
|---|
| 5292 | p = (pa <= pb && pa <= pc) ? a : (pb <= pc) ? b : c;
|
|---|
| 5293 |
|
|---|
| 5294 | *rp = (png_byte)(((int)(*rp) + p) & 0xff);
|
|---|
| 5295 | rp++;
|
|---|
| 5296 | }
|
|---|
| 5297 | } /* end !UseMMX_paeth */
|
|---|
| 5298 | break;
|
|---|
| 5299 |
|
|---|
| 5300 | default:
|
|---|
| 5301 | png_warning(png_ptr, "Ignoring bad row-filter type");
|
|---|
| 5302 | *row=0;
|
|---|
| 5303 | break;
|
|---|
| 5304 | }
|
|---|
| 5305 | }
|
|---|
| 5306 |
|
|---|
| 5307 | #endif /* PNG_HAVE_ASSEMBLER_READ_FILTER_ROW */
|
|---|
| 5308 |
|
|---|
| 5309 |
|
|---|
| 5310 | /*===========================================================================*/
|
|---|
| 5311 | /* */
|
|---|
| 5312 | /* P N G _ M M X _ S U P P O R T */
|
|---|
| 5313 | /* */
|
|---|
| 5314 | /*===========================================================================*/
|
|---|
| 5315 |
|
|---|
| 5316 | /* GRR NOTES: (1) the following code assumes 386 or better (pushfl/popfl)
|
|---|
| 5317 | * (2) all instructions compile with gcc 2.7.2.3 and later
|
|---|
| 5318 | * (3) the function is moved down here to prevent gcc from
|
|---|
| 5319 | * inlining it in multiple places and then barfing be-
|
|---|
| 5320 | * cause the ".NOT_SUPPORTED" label is multiply defined
|
|---|
| 5321 | * [is there a way to signal that a *single* function should
|
|---|
| 5322 | * not be inlined? is there a way to modify the label for
|
|---|
| 5323 | * each inlined instance, e.g., by appending _1, _2, etc.?
|
|---|
| 5324 | * maybe if don't use leading "." in label name? (nope...sigh)]
|
|---|
| 5325 | */
|
|---|
| 5326 |
|
|---|
| 5327 | int PNGAPI
|
|---|
| 5328 | png_mmx_support(void)
|
|---|
| 5329 | {
|
|---|
| 5330 | #if defined(PNG_MMX_CODE_SUPPORTED)
|
|---|
| 5331 | __asm__ __volatile__ (
|
|---|
| 5332 | "pushl %%ebx \n\t" // ebx gets clobbered by CPUID instruction
|
|---|
| 5333 | "pushl %%ecx \n\t" // so does ecx...
|
|---|
| 5334 | "pushl %%edx \n\t" // ...and edx (but ecx & edx safe on Linux)
|
|---|
| 5335 | // ".byte 0x66 \n\t" // convert 16-bit pushf to 32-bit pushfd
|
|---|
| 5336 | // "pushf \n\t" // 16-bit pushf
|
|---|
| 5337 | "pushfl \n\t" // save Eflag to stack
|
|---|
| 5338 | "popl %%eax \n\t" // get Eflag from stack into eax
|
|---|
| 5339 | "movl %%eax, %%ecx \n\t" // make another copy of Eflag in ecx
|
|---|
| 5340 | "xorl $0x200000, %%eax \n\t" // toggle ID bit in Eflag (i.e., bit 21)
|
|---|
| 5341 | "pushl %%eax \n\t" // save modified Eflag back to stack
|
|---|
| 5342 | // ".byte 0x66 \n\t" // convert 16-bit popf to 32-bit popfd
|
|---|
| 5343 | // "popf \n\t" // 16-bit popf
|
|---|
| 5344 | "popfl \n\t" // restore modified value to Eflag reg
|
|---|
| 5345 | "pushfl \n\t" // save Eflag to stack
|
|---|
| 5346 | "popl %%eax \n\t" // get Eflag from stack
|
|---|
| 5347 | "pushl %%ecx \n\t" // save original Eflag to stack
|
|---|
| 5348 | "popfl \n\t" // restore original Eflag
|
|---|
| 5349 | "xorl %%ecx, %%eax \n\t" // compare new Eflag with original Eflag
|
|---|
| 5350 | "jz 0f \n\t" // if same, CPUID instr. is not supported
|
|---|
| 5351 |
|
|---|
| 5352 | "xorl %%eax, %%eax \n\t" // set eax to zero
|
|---|
| 5353 | // ".byte 0x0f, 0xa2 \n\t" // CPUID instruction (two-byte opcode)
|
|---|
| 5354 | "cpuid \n\t" // get the CPU identification info
|
|---|
| 5355 | "cmpl $1, %%eax \n\t" // make sure eax return non-zero value
|
|---|
| 5356 | "jl 0f \n\t" // if eax is zero, MMX is not supported
|
|---|
| 5357 |
|
|---|
| 5358 | "xorl %%eax, %%eax \n\t" // set eax to zero and...
|
|---|
| 5359 | "incl %%eax \n\t" // ...increment eax to 1. This pair is
|
|---|
| 5360 | // faster than the instruction "mov eax, 1"
|
|---|
| 5361 | "cpuid \n\t" // get the CPU identification info again
|
|---|
| 5362 | "andl $0x800000, %%edx \n\t" // mask out all bits but MMX bit (23)
|
|---|
| 5363 | "cmpl $0, %%edx \n\t" // 0 = MMX not supported
|
|---|
| 5364 | "jz 0f \n\t" // non-zero = yes, MMX IS supported
|
|---|
| 5365 |
|
|---|
| 5366 | "movl $1, %%eax \n\t" // set return value to 1
|
|---|
| 5367 | "jmp 1f \n\t" // DONE: have MMX support
|
|---|
| 5368 |
|
|---|
| 5369 | "0: \n\t" // .NOT_SUPPORTED: target label for jump instructions
|
|---|
| 5370 | "movl $0, %%eax \n\t" // set return value to 0
|
|---|
| 5371 | "1: \n\t" // .RETURN: target label for jump instructions
|
|---|
| 5372 | "movl %%eax, _mmx_supported \n\t" // save in global static variable, too
|
|---|
| 5373 | "popl %%edx \n\t" // restore edx
|
|---|
| 5374 | "popl %%ecx \n\t" // restore ecx
|
|---|
| 5375 | "popl %%ebx \n\t" // restore ebx
|
|---|
| 5376 |
|
|---|
| 5377 | // "ret \n\t" // DONE: no MMX support
|
|---|
| 5378 | // (fall through to standard C "ret")
|
|---|
| 5379 |
|
|---|
| 5380 | : // output list (none)
|
|---|
| 5381 |
|
|---|
| 5382 | : // any variables used on input (none)
|
|---|
| 5383 |
|
|---|
| 5384 | : "%eax" // clobber list
|
|---|
| 5385 | // , "%ebx", "%ecx", "%edx" // GRR: we handle these manually
|
|---|
| 5386 | // , "memory" // if write to a variable gcc thought was in a reg
|
|---|
| 5387 | // , "cc" // "condition codes" (flag bits)
|
|---|
| 5388 | );
|
|---|
| 5389 | #else
|
|---|
| 5390 | _mmx_supported = 0;
|
|---|
| 5391 | #endif /* PNG_MMX_CODE_SUPPORTED */
|
|---|
| 5392 |
|
|---|
| 5393 | return _mmx_supported;
|
|---|
| 5394 | }
|
|---|
| 5395 |
|
|---|
| 5396 |
|
|---|
| 5397 | #endif /* PNG_USE_PNGGCCRD */
|
|---|
