2001-05-28 05:21:37 +00:00
|
|
|
/* bit_fix.h
|
2002-01-27 12:00:11 +00:00
|
|
|
Copyright 1987, 1992, 2000, 2001 Free Software Foundation, Inc.
|
1998-03-01 22:58:51 +00:00
|
|
|
|
|
|
|
|
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 2, 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
|
2001-05-28 05:21:37 +00:00
|
|
|
along with GAS; see the file COPYING. If not, write to the Free
|
|
|
|
|
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
|
|
|
|
|
02111-1307, USA. */
|
1998-03-01 22:58:51 +00:00
|
|
|
|
|
|
|
|
/* The bit_fix was implemented to support machines that need variables
|
|
|
|
|
to be inserted in bitfields other than 1, 2 and 4 bytes.
|
2004-06-16 05:45:41 +00:00
|
|
|
Furthermore it gives us a possibility to mask in bits in the symbol
|
1998-03-01 22:58:51 +00:00
|
|
|
when it's fixed in the objectcode 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
|
2002-01-27 12:00:11 +00:00
|
|
|
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)
|
1998-03-01 22:58:51 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#ifndef __bit_fix_h__
|
|
|
|
|
#define __bit_fix_h__
|
|
|
|
|
|
2001-05-28 05:21:37 +00:00
|
|
|
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 */
|
|
|
|
|
};
|
1998-03-01 22:58:51 +00:00
|
|
|
typedef struct bit_fix bit_fixS;
|
|
|
|
|
|
|
|
|
|
#endif /* __bit_fix_h__ */
|
