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author | K. Richard Pixley <rich@cygnus> | 1992-02-17 15:54:49 +0000 |
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committer | K. Richard Pixley <rich@cygnus> | 1992-02-17 15:54:49 +0000 |
commit | 542e1629fdd4df8920511c4eb2df15bb83feb13b (patch) | |
tree | f1b70b61ce3707e08b2f43081adfd3b4850654f3 /gas/bit_fix.h | |
parent | af2136245013fad2f72249258452d5f7154d5719 (diff) | |
download | fsf-binutils-gdb-542e1629fdd4df8920511c4eb2df15bb83feb13b.zip fsf-binutils-gdb-542e1629fdd4df8920511c4eb2df15bb83feb13b.tar.gz fsf-binutils-gdb-542e1629fdd4df8920511c4eb2df15bb83feb13b.tar.bz2 |
fighting bitrot in a major way
Diffstat (limited to 'gas/bit_fix.h')
-rw-r--r-- | gas/bit_fix.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/gas/bit_fix.h b/gas/bit_fix.h new file mode 100644 index 0000000..7936927 --- /dev/null +++ b/gas/bit_fix.h @@ -0,0 +1,50 @@ +/* write.h + + Copyright (C) 1987, 1992 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 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 + along with GAS; see the file COPYING. If not, write to + the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, 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 possibillity to mask in bits in the symbol + 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 + can handle bitfields. Ie handle an expression, evaluate it and insert + the result in an some bitfield. ( ex: 5 bits in a short field of a 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__ */ + + /* end of bit_fix.h */ |