| 1 |
147 |
khays |
/* bit_fix.h
|
| 2 |
|
|
Copyright 1987, 1992, 2000, 2001, 2003, 2005, 2007
|
| 3 |
|
|
Free Software Foundation, Inc.
|
| 4 |
|
|
|
| 5 |
|
|
This file is part of GAS, the GNU Assembler.
|
| 6 |
|
|
|
| 7 |
|
|
GAS is free software; you can redistribute it and/or modify
|
| 8 |
|
|
it under the terms of the GNU General Public License as published by
|
| 9 |
|
|
the Free Software Foundation; either version 3, or (at your option)
|
| 10 |
|
|
any later version.
|
| 11 |
|
|
|
| 12 |
|
|
GAS is distributed in the hope that it will be useful, but WITHOUT
|
| 13 |
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
| 14 |
|
|
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
|
| 15 |
|
|
License for more details.
|
| 16 |
|
|
|
| 17 |
|
|
You should have received a copy of the GNU General Public License
|
| 18 |
|
|
along with GAS; see the file COPYING. If not, write to the Free
|
| 19 |
|
|
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
|
| 20 |
|
|
02110-1301, USA. */
|
| 21 |
|
|
|
| 22 |
|
|
/* The bit_fix was implemented to support machines that need variables
|
| 23 |
|
|
to be inserted in bitfields other than 1, 2 and 4 bytes.
|
| 24 |
|
|
Furthermore it gives us a possibility to mask in bits in the symbol
|
| 25 |
|
|
when it's fixed in the objectcode and check the symbols limits.
|
| 26 |
|
|
|
| 27 |
|
|
The or-mask is used to set the huffman bits in displacements for the
|
| 28 |
|
|
ns32k port.
|
| 29 |
|
|
The acbi, addqi, movqi, cmpqi instruction requires an assembler that
|
| 30 |
|
|
can handle bitfields. Ie. handle an expression, evaluate it and insert
|
| 31 |
|
|
the result in some bitfield. (eg: 5 bits in a short field of an opcode). */
|
| 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__ */
|
