| 1 | /* bit_fix.h
|
|---|
| 2 | Copyright 1987, 1992, 2000, 2001 Free Software Foundation, Inc.
|
|---|
| 3 |
|
|---|
| 4 | This file is part of GAS, the GNU Assembler.
|
|---|
| 5 |
|
|---|
| 6 | GAS is free software; you can redistribute it and/or modify
|
|---|
| 7 | it under the terms of the GNU General Public License as published by
|
|---|
| 8 | the Free Software Foundation; either version 2, or (at your option)
|
|---|
| 9 | any later version.
|
|---|
| 10 |
|
|---|
| 11 | GAS is distributed in the hope that it will be useful,
|
|---|
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|---|
| 14 | GNU General Public License for more details.
|
|---|
| 15 |
|
|---|
| 16 | You should have received a copy of the GNU General Public License
|
|---|
| 17 | along with GAS; see the file COPYING. If not, write to the Free
|
|---|
| 18 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA
|
|---|
| 19 | 02111-1307, USA. */
|
|---|
| 20 |
|
|---|
| 21 | /* The bit_fix was implemented to support machines that need variables
|
|---|
| 22 | to be inserted in bitfields other than 1, 2 and 4 bytes.
|
|---|
| 23 | Furthermore it gives us a possibillity to mask in bits in the symbol
|
|---|
| 24 | when it's fixed in the objectcode and check the symbols limits.
|
|---|
| 25 |
|
|---|
| 26 | The or-mask is used to set the huffman bits in displacements for the
|
|---|
| 27 | ns32k port.
|
|---|
| 28 | The acbi, addqi, movqi, cmpqi instruction requires an assembler that
|
|---|
| 29 | can handle bitfields. Ie. handle an expression, evaluate it and insert
|
|---|
| 30 | the result in some bitfield. (eg: 5 bits in a short field of an opcode)
|
|---|
| 31 | */
|
|---|
| 32 |
|
|---|
| 33 | #ifndef __bit_fix_h__
|
|---|
| 34 | #define __bit_fix_h__
|
|---|
| 35 |
|
|---|
| 36 | struct bit_fix {
|
|---|
| 37 | int fx_bit_size; /* Length of bitfield */
|
|---|
| 38 | int fx_bit_offset; /* Bit offset to bitfield */
|
|---|
| 39 | long fx_bit_base; /* Where do we apply the bitfix.
|
|---|
| 40 | If this is zero, default is assumed. */
|
|---|
| 41 | long fx_bit_base_adj; /* Adjustment of base */
|
|---|
| 42 | long fx_bit_max; /* Signextended max for bitfield */
|
|---|
| 43 | long fx_bit_min; /* Signextended min for bitfield */
|
|---|
| 44 | long fx_bit_add; /* Or mask, used for huffman prefix */
|
|---|
| 45 | };
|
|---|
| 46 | typedef struct bit_fix bit_fixS;
|
|---|
| 47 |
|
|---|
| 48 | #endif /* __bit_fix_h__ */
|
|---|
