bitfields.isa revision 4586:597006d41ca8 
1// Copyright (c) 2007 The Hewlett-Packard Development Company
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34// output created using the software may be prepared, but only for
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41//
42// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
43// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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45// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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53//
54// Authors: Gabe Black
55
56////////////////////////////////////////////////////////////////////
57//
58// Bitfield definitions.
59//
60
61//REX prefix
62def bitfield REX rex;
63def bitfield REX_W rex.w;
64def bitfield REX_R rex.r;
65def bitfield REX_X rex.x;
66def bitfield REX_B rex.b;
67
68//Legacy prefixes
69def bitfield LEGACY legacy;
70def bitfield LEGACY_REPNE legacy.repne;
71def bitfield LEGACY_REP legacy.rep;
72def bitfield LEGACY_LOCK legacy.lock;
73def bitfield LEGACY_ADDR legacy.addr;
74def bitfield LEGACY_OP legacy.op;
75def bitfield LEGACY_SEG legacy.seg;
76
77// Pieces of the opcode
78def bitfield OPCODE_NUM opcode.num;
79def bitfield OPCODE_PREFIXA opcode.prefixA;
80def bitfield OPCODE_PREFIXB opcode.prefixB;
81def bitfield OPCODE_OP opcode.op;
82//The top 5 bits of the opcode tend to split the instructions into groups
83def bitfield OPCODE_OP_TOP5 opcode.op.top5;
84def bitfield OPCODE_OP_BOTTOM3 opcode.op.bottom3;
85
86// Immediate fields
87def bitfield IMMEDIATE immediate;
88def bitfield DISPLACEMENT displacement;
89
90//Modifier bytes
91def bitfield MODRM modRM;
92def bitfield MODRM_MOD modRM.mod;
93def bitfield MODRM_REG modRM.reg;
94def bitfield MODRM_RM modRM.rm;
95
96def bitfield SIB sib;
97def bitfield SIB_SCALE sib.scale;
98def bitfield SIB_INDEX sib.index;
99def bitfield SIB_BASE sib.base;
100
101def bitfield OPSIZE opSize;
102def bitfield ADDRSIZE addrSize;
103def bitfield STACKSIZE stackSize;
104
105def bitfield MODE mode;
106def bitfield MODE_MODE mode.mode;
107def bitfield MODE_SUBMODE mode.submode;
108