48 lines
1.9 KiB
C
48 lines
1.9 KiB
C
/* bit_fix.h
|
|
Copyright (C) 1987-2018 Free Software Foundation, Inc.
|
|
|
|
This file is part of GAS, the GNU Assembler.
|
|
|
|
GAS is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3, or (at your option)
|
|
any later version.
|
|
|
|
GAS is distributed in the hope that it will be useful, but WITHOUT
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
|
|
License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GAS; see the file COPYING. If not, write to the Free
|
|
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
|
|
02110-1301, USA. */
|
|
|
|
/* The bit_fix was implemented to support machines that need variables
|
|
to be inserted in bitfields other than 1, 2 and 4 bytes.
|
|
Furthermore it gives us a possibility to mask in bits in the symbol
|
|
when it's fixed in the object code and check the symbols limits.
|
|
|
|
The or-mask is used to set the huffman bits in displacements for the
|
|
ns32k port.
|
|
The acbi, addqi, movqi, cmpqi instruction requires an assembler that
|
|
can handle bitfields. Ie. handle an expression, evaluate it and insert
|
|
the result in some bitfield. (eg: 5 bits in a short field of an opcode). */
|
|
|
|
#ifndef __bit_fix_h__
|
|
#define __bit_fix_h__
|
|
|
|
struct bit_fix {
|
|
int fx_bit_size; /* Length of bitfield */
|
|
int fx_bit_offset; /* Bit offset to bitfield */
|
|
long fx_bit_base; /* Where do we apply the bitfix.
|
|
If this is zero, default is assumed. */
|
|
long fx_bit_base_adj; /* Adjustment of base */
|
|
long fx_bit_max; /* Signextended max for bitfield */
|
|
long fx_bit_min; /* Signextended min for bitfield */
|
|
long fx_bit_add; /* Or mask, used for huffman prefix */
|
|
};
|
|
typedef struct bit_fix bit_fixS;
|
|
|
|
#endif /* __bit_fix_h__ */
|