| 1 | @c Copyright 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
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| 2 | @c This is part of the GAS manual.
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| 3 | @c For copying conditions, see the file as.texinfo.
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| 4 | @ifset GENERIC
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| 5 | @page
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| 6 | @node Z8000-Dependent
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| 7 | @chapter Z8000 Dependent Features
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| 8 | @end ifset
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| 9 | @ifclear GENERIC
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| 10 | @node Machine Dependencies
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| 11 | @chapter Z8000 Dependent Features
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| 12 | @end ifclear
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| 13 |
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| 14 | @cindex Z8000 support
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| 15 | The Z8000 @value{AS} supports both members of the Z8000 family: the
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| 16 | unsegmented Z8002, with 16 bit addresses, and the segmented Z8001 with
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| 17 | 24 bit addresses.
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| 18 |
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| 19 | When the assembler is in unsegmented mode (specified with the
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| 20 | @code{unsegm} directive), an address takes up one word (16 bit)
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| 21 | sized register. When the assembler is in segmented mode (specified with
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| 22 | the @code{segm} directive), a 24-bit address takes up a long (32 bit)
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| 23 | register. @xref{Z8000 Directives,,Assembler Directives for the Z8000},
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| 24 | for a list of other Z8000 specific assembler directives.
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| 25 |
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| 26 | @menu
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| 27 | * Z8000 Options:: No special command-line options for Z8000
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| 28 | * Z8000 Syntax:: Assembler syntax for the Z8000
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| 29 | * Z8000 Directives:: Special directives for the Z8000
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| 30 | * Z8000 Opcodes:: Opcodes
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| 31 | @end menu
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| 32 |
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| 33 | @node Z8000 Options
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| 34 | @section Options
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| 35 |
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| 36 | @cindex Z8000 options
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| 37 | @cindex options, Z8000
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| 38 | @code{@value{AS}} has no additional command-line options for the Zilog
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| 39 | Z8000 family.
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| 40 |
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| 41 | @node Z8000 Syntax
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| 42 | @section Syntax
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| 43 | @menu
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| 44 | * Z8000-Chars:: Special Characters
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| 45 | * Z8000-Regs:: Register Names
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| 46 | * Z8000-Addressing:: Addressing Modes
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| 47 | @end menu
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| 48 |
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| 49 | @node Z8000-Chars
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| 50 | @subsection Special Characters
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| 51 |
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| 52 | @cindex line comment character, Z8000
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| 53 | @cindex Z8000 line comment character
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| 54 | @samp{!} is the line comment character.
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| 55 |
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| 56 | @cindex line separator, Z8000
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| 57 | @cindex statement separator, Z8000
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| 58 | @cindex Z8000 line separator
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| 59 | You can use @samp{;} instead of a newline to separate statements.
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| 60 |
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| 61 | @node Z8000-Regs
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| 62 | @subsection Register Names
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| 63 |
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| 64 | @cindex Z8000 registers
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| 65 | @cindex registers, Z8000
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| 66 | The Z8000 has sixteen 16 bit registers, numbered 0 to 15. You can refer
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| 67 | to different sized groups of registers by register number, with the
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| 68 | prefix @samp{r} for 16 bit registers, @samp{rr} for 32 bit registers and
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| 69 | @samp{rq} for 64 bit registers. You can also refer to the contents of
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| 70 | the first eight (of the sixteen 16 bit registers) by bytes. They are
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| 71 | named @samp{r@var{n}h} and @samp{r@var{n}l}.
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| 72 |
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| 73 | @smallexample
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| 74 | @exdent @emph{byte registers}
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| 75 | r0l r0h r1h r1l r2h r2l r3h r3l
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| 76 | r4h r4l r5h r5l r6h r6l r7h r7l
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| 77 |
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| 78 | @exdent @emph{word registers}
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| 79 | r0 r1 r2 r3 r4 r5 r6 r7 r8 r9 r10 r11 r12 r13 r14 r15
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| 80 |
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| 81 | @exdent @emph{long word registers}
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| 82 | rr0 rr2 rr4 rr6 rr8 rr10 rr12 rr14
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| 83 |
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| 84 | @exdent @emph{quad word registers}
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| 85 | rq0 rq4 rq8 rq12
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| 86 | @end smallexample
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| 87 |
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| 88 | @node Z8000-Addressing
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| 89 | @subsection Addressing Modes
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| 90 |
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| 91 | @cindex addressing modes, Z8000
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| 92 | @cindex Z800 addressing modes
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| 93 | @value{AS} understands the following addressing modes for the Z8000:
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| 94 |
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| 95 | @table @code
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| 96 | @item r@var{n}
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| 97 | Register direct
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| 98 |
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| 99 | @item @@r@var{n}
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| 100 | Indirect register
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| 101 |
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| 102 | @item @var{addr}
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| 103 | Direct: the 16 bit or 24 bit address (depending on whether the assembler
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| 104 | is in segmented or unsegmented mode) of the operand is in the instruction.
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| 105 |
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| 106 | @item address(r@var{n})
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| 107 | Indexed: the 16 or 24 bit address is added to the 16 bit register to produce
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| 108 | the final address in memory of the operand.
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| 109 |
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| 110 | @item r@var{n}(#@var{imm})
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| 111 | Base Address: the 16 or 24 bit register is added to the 16 bit sign
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| 112 | extended immediate displacement to produce the final address in memory
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| 113 | of the operand.
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| 114 |
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| 115 | @item r@var{n}(r@var{m})
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| 116 | Base Index: the 16 or 24 bit register r@var{n} is added to the sign
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| 117 | extended 16 bit index register r@var{m} to produce the final address in
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| 118 | memory of the operand.
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| 119 |
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| 120 | @item #@var{xx}
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| 121 | Immediate data @var{xx}.
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| 122 | @end table
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| 123 |
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| 124 | @node Z8000 Directives
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| 125 | @section Assembler Directives for the Z8000
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| 126 |
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| 127 | @cindex Z8000 directives
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| 128 | @cindex directives, Z8000
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| 129 | The Z8000 port of @value{AS} includes these additional assembler directives,
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| 130 | for compatibility with other Z8000 assemblers. As shown, these do not
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| 131 | begin with @samp{.} (unlike the ordinary @value{AS} directives).
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| 132 |
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| 133 | @table @code
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| 134 | @kindex segm
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| 135 | @item segm
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| 136 | Generates code for the segmented Z8001.
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| 137 |
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| 138 | @kindex unsegm
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| 139 | @item unsegm
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| 140 | Generates code for the unsegmented Z8002.
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| 141 |
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| 142 | @kindex name
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| 143 | @item name
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| 144 | Synonym for @code{.file}
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| 145 |
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| 146 | @kindex global
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| 147 | @item global
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| 148 | Synonym for @code{.global}
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| 149 |
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| 150 | @kindex wval
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| 151 | @item wval
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| 152 | Synonym for @code{.word}
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| 153 |
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| 154 | @kindex lval
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| 155 | @item lval
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| 156 | Synonym for @code{.long}
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| 157 |
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| 158 | @kindex bval
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| 159 | @item bval
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| 160 | Synonym for @code{.byte}
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| 161 |
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| 162 | @kindex sval
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| 163 | @item sval
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| 164 | Assemble a string. @code{sval} expects one string literal, delimited by
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| 165 | single quotes. It assembles each byte of the string into consecutive
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| 166 | addresses. You can use the escape sequence @samp{%@var{xx}} (where
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| 167 | @var{xx} represents a two-digit hexadecimal number) to represent the
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| 168 | character whose @sc{ascii} value is @var{xx}. Use this feature to
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| 169 | describe single quote and other characters that may not appear in string
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| 170 | literals as themselves. For example, the C statement @w{@samp{char *a =
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| 171 | "he said \"it's 50% off\"";}} is represented in Z8000 assembly language
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| 172 | (shown with the assembler output in hex at the left) as
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| 173 |
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| 174 | @iftex
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| 175 | @begingroup
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| 176 | @let@nonarrowing=@comment
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| 177 | @end iftex
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| 178 | @smallexample
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| 179 | 68652073 sval 'he said %22it%27s 50%25 off%22%00'
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| 180 | 61696420
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| 181 | 22697427
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| 182 | 73203530
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| 183 | 25206F66
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| 184 | 662200
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| 185 | @end smallexample
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| 186 | @iftex
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| 187 | @endgroup
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| 188 | @end iftex
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| 189 |
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| 190 | @kindex rsect
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| 191 | @item rsect
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| 192 | synonym for @code{.section}
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| 193 |
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| 194 | @kindex block
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| 195 | @item block
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| 196 | synonym for @code{.space}
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| 197 |
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| 198 | @kindex even
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| 199 | @item even
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| 200 | special case of @code{.align}; aligns output to even byte boundary.
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| 201 | @end table
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| 202 |
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| 203 | @node Z8000 Opcodes
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| 204 | @section Opcodes
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| 205 |
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| 206 | @cindex Z8000 opcode summary
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| 207 | @cindex opcode summary, Z8000
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| 208 | @cindex mnemonics, Z8000
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| 209 | @cindex instruction summary, Z8000
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| 210 | For detailed information on the Z8000 machine instruction set, see
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| 211 | @cite{Z8000 Technical Manual}.
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| 212 |
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| 213 | @ifset SMALL
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| 214 | @c this table, due to the multi-col faking and hardcoded order, looks silly
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| 215 | @c except in smallbook. See comments below "@set SMALL" near top of this file.
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| 216 |
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| 217 | The following table summarizes the opcodes and their arguments:
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| 218 | @iftex
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| 219 | @begingroup
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| 220 | @let@nonarrowing=@comment
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| 221 | @end iftex
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| 222 | @smallexample
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| 223 |
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| 224 | rs @r{16 bit source register}
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| 225 | rd @r{16 bit destination register}
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| 226 | rbs @r{8 bit source register}
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| 227 | rbd @r{8 bit destination register}
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| 228 | rrs @r{32 bit source register}
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| 229 | rrd @r{32 bit destination register}
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| 230 | rqs @r{64 bit source register}
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| 231 | rqd @r{64 bit destination register}
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| 232 | addr @r{16/24 bit address}
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| 233 | imm @r{immediate data}
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| 234 |
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| 235 | adc rd,rs clrb addr cpsir @@rd,@@rs,rr,cc
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| 236 | adcb rbd,rbs clrb addr(rd) cpsirb @@rd,@@rs,rr,cc
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| 237 | add rd,@@rs clrb rbd dab rbd
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| 238 | add rd,addr com @@rd dbjnz rbd,disp7
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| 239 | add rd,addr(rs) com addr dec @@rd,imm4m1
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| 240 | add rd,imm16 com addr(rd) dec addr(rd),imm4m1
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| 241 | add rd,rs com rd dec addr,imm4m1
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| 242 | addb rbd,@@rs comb @@rd dec rd,imm4m1
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| 243 | addb rbd,addr comb addr decb @@rd,imm4m1
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| 244 | addb rbd,addr(rs) comb addr(rd) decb addr(rd),imm4m1
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| 245 | addb rbd,imm8 comb rbd decb addr,imm4m1
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| 246 | addb rbd,rbs comflg flags decb rbd,imm4m1
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| 247 | addl rrd,@@rs cp @@rd,imm16 di i2
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| 248 | addl rrd,addr cp addr(rd),imm16 div rrd,@@rs
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| 249 | addl rrd,addr(rs) cp addr,imm16 div rrd,addr
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| 250 | addl rrd,imm32 cp rd,@@rs div rrd,addr(rs)
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| 251 | addl rrd,rrs cp rd,addr div rrd,imm16
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| 252 | and rd,@@rs cp rd,addr(rs) div rrd,rs
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| 253 | and rd,addr cp rd,imm16 divl rqd,@@rs
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| 254 | and rd,addr(rs) cp rd,rs divl rqd,addr
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| 255 | and rd,imm16 cpb @@rd,imm8 divl rqd,addr(rs)
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| 256 | and rd,rs cpb addr(rd),imm8 divl rqd,imm32
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| 257 | andb rbd,@@rs cpb addr,imm8 divl rqd,rrs
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| 258 | andb rbd,addr cpb rbd,@@rs djnz rd,disp7
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| 259 | andb rbd,addr(rs) cpb rbd,addr ei i2
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| 260 | andb rbd,imm8 cpb rbd,addr(rs) ex rd,@@rs
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| 261 | andb rbd,rbs cpb rbd,imm8 ex rd,addr
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| 262 | bit @@rd,imm4 cpb rbd,rbs ex rd,addr(rs)
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| 263 | bit addr(rd),imm4 cpd rd,@@rs,rr,cc ex rd,rs
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| 264 | bit addr,imm4 cpdb rbd,@@rs,rr,cc exb rbd,@@rs
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| 265 | bit rd,imm4 cpdr rd,@@rs,rr,cc exb rbd,addr
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| 266 | bit rd,rs cpdrb rbd,@@rs,rr,cc exb rbd,addr(rs)
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| 267 | bitb @@rd,imm4 cpi rd,@@rs,rr,cc exb rbd,rbs
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| 268 | bitb addr(rd),imm4 cpib rbd,@@rs,rr,cc ext0e imm8
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| 269 | bitb addr,imm4 cpir rd,@@rs,rr,cc ext0f imm8
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| 270 | bitb rbd,imm4 cpirb rbd,@@rs,rr,cc ext8e imm8
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| 271 | bitb rbd,rs cpl rrd,@@rs ext8f imm8
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| 272 | bpt cpl rrd,addr exts rrd
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| 273 | call @@rd cpl rrd,addr(rs) extsb rd
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| 274 | call addr cpl rrd,imm32 extsl rqd
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| 275 | call addr(rd) cpl rrd,rrs halt
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| 276 | calr disp12 cpsd @@rd,@@rs,rr,cc in rd,@@rs
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| 277 | clr @@rd cpsdb @@rd,@@rs,rr,cc in rd,imm16
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| 278 | clr addr cpsdr @@rd,@@rs,rr,cc inb rbd,@@rs
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| 279 | clr addr(rd) cpsdrb @@rd,@@rs,rr,cc inb rbd,imm16
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| 280 | clr rd cpsi @@rd,@@rs,rr,cc inc @@rd,imm4m1
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| 281 | clrb @@rd cpsib @@rd,@@rs,rr,cc inc addr(rd),imm4m1
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| 282 | inc addr,imm4m1 ldb rbd,rs(rx) mult rrd,addr(rs)
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| 283 | inc rd,imm4m1 ldb rd(imm16),rbs mult rrd,imm16
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| 284 | incb @@rd,imm4m1 ldb rd(rx),rbs mult rrd,rs
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| 285 | incb addr(rd),imm4m1 ldctl ctrl,rs multl rqd,@@rs
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| 286 | incb addr,imm4m1 ldctl rd,ctrl multl rqd,addr
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| 287 | incb rbd,imm4m1 ldd @@rs,@@rd,rr multl rqd,addr(rs)
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| 288 | ind @@rd,@@rs,ra lddb @@rs,@@rd,rr multl rqd,imm32
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| 289 | indb @@rd,@@rs,rba lddr @@rs,@@rd,rr multl rqd,rrs
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| 290 | inib @@rd,@@rs,ra lddrb @@rs,@@rd,rr neg @@rd
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| 291 | inibr @@rd,@@rs,ra ldi @@rd,@@rs,rr neg addr
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| 292 | iret ldib @@rd,@@rs,rr neg addr(rd)
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| 293 | jp cc,@@rd ldir @@rd,@@rs,rr neg rd
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| 294 | jp cc,addr ldirb @@rd,@@rs,rr negb @@rd
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| 295 | jp cc,addr(rd) ldk rd,imm4 negb addr
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| 296 | jr cc,disp8 ldl @@rd,rrs negb addr(rd)
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| 297 | ld @@rd,imm16 ldl addr(rd),rrs negb rbd
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| 298 | ld @@rd,rs ldl addr,rrs nop
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| 299 | ld addr(rd),imm16 ldl rd(imm16),rrs or rd,@@rs
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| 300 | ld addr(rd),rs ldl rd(rx),rrs or rd,addr
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| 301 | ld addr,imm16 ldl rrd,@@rs or rd,addr(rs)
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| 302 | ld addr,rs ldl rrd,addr or rd,imm16
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| 303 | ld rd(imm16),rs ldl rrd,addr(rs) or rd,rs
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| 304 | ld rd(rx),rs ldl rrd,imm32 orb rbd,@@rs
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| 305 | ld rd,@@rs ldl rrd,rrs orb rbd,addr
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| 306 | ld rd,addr ldl rrd,rs(imm16) orb rbd,addr(rs)
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| 307 | ld rd,addr(rs) ldl rrd,rs(rx) orb rbd,imm8
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| 308 | ld rd,imm16 ldm @@rd,rs,n orb rbd,rbs
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| 309 | ld rd,rs ldm addr(rd),rs,n out @@rd,rs
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| 310 | ld rd,rs(imm16) ldm addr,rs,n out imm16,rs
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| 311 | ld rd,rs(rx) ldm rd,@@rs,n outb @@rd,rbs
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| 312 | lda rd,addr ldm rd,addr(rs),n outb imm16,rbs
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| 313 | lda rd,addr(rs) ldm rd,addr,n outd @@rd,@@rs,ra
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| 314 | lda rd,rs(imm16) ldps @@rs outdb @@rd,@@rs,rba
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| 315 | lda rd,rs(rx) ldps addr outib @@rd,@@rs,ra
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| 316 | ldar rd,disp16 ldps addr(rs) outibr @@rd,@@rs,ra
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| 317 | ldb @@rd,imm8 ldr disp16,rs pop @@rd,@@rs
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| 318 | ldb @@rd,rbs ldr rd,disp16 pop addr(rd),@@rs
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| 319 | ldb addr(rd),imm8 ldrb disp16,rbs pop addr,@@rs
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| 320 | ldb addr(rd),rbs ldrb rbd,disp16 pop rd,@@rs
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| 321 | ldb addr,imm8 ldrl disp16,rrs popl @@rd,@@rs
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| 322 | ldb addr,rbs ldrl rrd,disp16 popl addr(rd),@@rs
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| 323 | ldb rbd,@@rs mbit popl addr,@@rs
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| 324 | ldb rbd,addr mreq rd popl rrd,@@rs
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| 325 | ldb rbd,addr(rs) mres push @@rd,@@rs
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| 326 | ldb rbd,imm8 mset push @@rd,addr
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| 327 | ldb rbd,rbs mult rrd,@@rs push @@rd,addr(rs)
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| 328 | ldb rbd,rs(imm16) mult rrd,addr push @@rd,imm16
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| 329 | push @@rd,rs set addr,imm4 subl rrd,imm32
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| 330 | pushl @@rd,@@rs set rd,imm4 subl rrd,rrs
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| 331 | pushl @@rd,addr set rd,rs tcc cc,rd
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| 332 | pushl @@rd,addr(rs) setb @@rd,imm4 tccb cc,rbd
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| 333 | pushl @@rd,rrs setb addr(rd),imm4 test @@rd
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| 334 | res @@rd,imm4 setb addr,imm4 test addr
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| 335 | res addr(rd),imm4 setb rbd,imm4 test addr(rd)
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| 336 | res addr,imm4 setb rbd,rs test rd
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| 337 | res rd,imm4 setflg imm4 testb @@rd
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| 338 | res rd,rs sinb rbd,imm16 testb addr
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| 339 | resb @@rd,imm4 sinb rd,imm16 testb addr(rd)
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| 340 | resb addr(rd),imm4 sind @@rd,@@rs,ra testb rbd
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| 341 | resb addr,imm4 sindb @@rd,@@rs,rba testl @@rd
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| 342 | resb rbd,imm4 sinib @@rd,@@rs,ra testl addr
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| 343 | resb rbd,rs sinibr @@rd,@@rs,ra testl addr(rd)
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| 344 | resflg imm4 sla rd,imm8 testl rrd
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| 345 | ret cc slab rbd,imm8 trdb @@rd,@@rs,rba
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| 346 | rl rd,imm1or2 slal rrd,imm8 trdrb @@rd,@@rs,rba
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| 347 | rlb rbd,imm1or2 sll rd,imm8 trib @@rd,@@rs,rbr
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| 348 | rlc rd,imm1or2 sllb rbd,imm8 trirb @@rd,@@rs,rbr
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| 349 | rlcb rbd,imm1or2 slll rrd,imm8 trtdrb @@ra,@@rb,rbr
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| 350 | rldb rbb,rba sout imm16,rs trtib @@ra,@@rb,rr
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| 351 | rr rd,imm1or2 soutb imm16,rbs trtirb @@ra,@@rb,rbr
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| 352 | rrb rbd,imm1or2 soutd @@rd,@@rs,ra trtrb @@ra,@@rb,rbr
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| 353 | rrc rd,imm1or2 soutdb @@rd,@@rs,rba tset @@rd
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| 354 | rrcb rbd,imm1or2 soutib @@rd,@@rs,ra tset addr
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| 355 | rrdb rbb,rba soutibr @@rd,@@rs,ra tset addr(rd)
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| 356 | rsvd36 sra rd,imm8 tset rd
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| 357 | rsvd38 srab rbd,imm8 tsetb @@rd
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| 358 | rsvd78 sral rrd,imm8 tsetb addr
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| 359 | rsvd7e srl rd,imm8 tsetb addr(rd)
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| 360 | rsvd9d srlb rbd,imm8 tsetb rbd
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| 361 | rsvd9f srll rrd,imm8 xor rd,@@rs
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| 362 | rsvdb9 sub rd,@@rs xor rd,addr
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| 363 | rsvdbf sub rd,addr xor rd,addr(rs)
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| 364 | sbc rd,rs sub rd,addr(rs) xor rd,imm16
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| 365 | sbcb rbd,rbs sub rd,imm16 xor rd,rs
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| 366 | sc imm8 sub rd,rs xorb rbd,@@rs
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| 367 | sda rd,rs subb rbd,@@rs xorb rbd,addr
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| 368 | sdab rbd,rs subb rbd,addr xorb rbd,addr(rs)
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| 369 | sdal rrd,rs subb rbd,addr(rs) xorb rbd,imm8
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| 370 | sdl rd,rs subb rbd,imm8 xorb rbd,rbs
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| 371 | sdlb rbd,rs subb rbd,rbs xorb rbd,rbs
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| 372 | sdll rrd,rs subl rrd,@@rs
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| 373 | set @@rd,imm4 subl rrd,addr
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| 374 | set addr(rd),imm4 subl rrd,addr(rs)
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| 375 | @end smallexample
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| 376 | @iftex
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| 377 | @endgroup
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| 378 | @end iftex
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| 379 | @end ifset
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| 380 |
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