| | 1 | /* bit_fix.h |
| | 2 | Copyright (C) 1987-2016 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 3, or (at your option) |
| | 9 | any later version. |
| | 10 | |
| | 11 | GAS is distributed in the hope that it will be useful, but WITHOUT |
| | 12 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| | 13 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
| | 14 | 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, 51 Franklin Street - Fifth Floor, Boston, MA |
| | 19 | 02110-1301, 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 possibility 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 | #ifndef __bit_fix_h__ |
| | 33 | #define __bit_fix_h__ |
| | 34 | |
| | 35 | struct bit_fix { |
| | 36 | int fx_bit_size; /* Length of bitfield */ |
| | 37 | int fx_bit_offset; /* Bit offset to bitfield */ |
| | 38 | long fx_bit_base; /* Where do we apply the bitfix. |
| | 39 | If this is zero, default is assumed. */ |
| | 40 | long fx_bit_base_adj; /* Adjustment of base */ |
| | 41 | long fx_bit_max; /* Signextended max for bitfield */ |
| | 42 | long fx_bit_min; /* Signextended min for bitfield */ |
| | 43 | long fx_bit_add; /* Or mask, used for huffman prefix */ |
| | 44 | }; |
| | 45 | typedef struct bit_fix bit_fixS; |
| | 46 | |
| | 47 | #endif /* __bit_fix_h__ */ |
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