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| 5222 | serge | 1 | /* bit_fix.h |
| 6324 | serge | 2 | Copyright (C) 1987-2015 Free Software Foundation, Inc. |
| 5222 | serge | 3 | |
| 4 | This file is part of GAS, the GNU Assembler. |
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| 5 | |||
| 6 | GAS is free software; you can redistribute it and/or modify |
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| 7 | it under the terms of the GNU General Public License as published by |
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| 8 | the Free Software Foundation; either version 3, or (at your option) |
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| 9 | any later version. |
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| 10 | |||
| 11 | GAS is distributed in the hope that it will be useful, but WITHOUT |
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| 12 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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| 13 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
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| 14 | License for more details. |
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| 15 | |||
| 16 | You should have received a copy of the GNU General Public License |
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| 17 | along with GAS; see the file COPYING. If not, write to the Free |
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| 18 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
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| 19 | 02110-1301, USA. */ |
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| 20 | |||
| 21 | /* The bit_fix was implemented to support machines that need variables |
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| 22 | to be inserted in bitfields other than 1, 2 and 4 bytes. |
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| 23 | Furthermore it gives us a possibility to mask in bits in the symbol |
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| 24 | when it's fixed in the objectcode and check the symbols limits. |
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| 25 | |||
| 26 | The or-mask is used to set the huffman bits in displacements for the |
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| 27 | ns32k port. |
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| 28 | The acbi, addqi, movqi, cmpqi instruction requires an assembler that |
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| 29 | can handle bitfields. Ie. handle an expression, evaluate it and insert |
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| 30 | the result in some bitfield. (eg: 5 bits in a short field of an opcode). */ |
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| 31 | |||
| 32 | #ifndef __bit_fix_h__ |
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| 33 | #define __bit_fix_h__ |
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| 34 | |||
| 35 | struct bit_fix { |
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| 36 | int fx_bit_size; /* Length of bitfield */ |
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| 37 | int fx_bit_offset; /* Bit offset to bitfield */ |
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| 38 | long fx_bit_base; /* Where do we apply the bitfix. |
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| 39 | If this is zero, default is assumed. */ |
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| 40 | long fx_bit_base_adj; /* Adjustment of base */ |
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| 41 | long fx_bit_max; /* Signextended max for bitfield */ |
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| 42 | long fx_bit_min; /* Signextended min for bitfield */ |
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| 43 | long fx_bit_add; /* Or mask, used for huffman prefix */ |
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| 44 | }; |
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| 45 | typedef struct bit_fix bit_fixS; |
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| 46 | |||
| 47 | #endif /* __bit_fix_h__ */ |