bitfields.isa revision 7087:fb8d5786ff30 
1// Copyright (c) 2007 The Hewlett-Packard Development Company
2// All rights reserved.
3//
4// The license below extends only to copyright in the software and shall
5// not be construed as granting a license to any other intellectual
6// property including but not limited to intellectual property relating
7// to a hardware implementation of the functionality of the software
8// licensed hereunder.  You may use the software subject to the license
9// terms below provided that you ensure that this notice is replicated
10// unmodified and in its entirety in all distributions of the software,
11// modified or unmodified, in source code or in binary form.
12//
13// Redistribution and use in source and binary forms, with or without
14// modification, are permitted provided that the following conditions are
15// met: redistributions of source code must retain the above copyright
16// notice, this list of conditions and the following disclaimer;
17// redistributions in binary form must reproduce the above copyright
18// notice, this list of conditions and the following disclaimer in the
19// documentation and/or other materials provided with the distribution;
20// neither the name of the copyright holders nor the names of its
21// contributors may be used to endorse or promote products derived from
22// this software without specific prior written permission.
23//
24// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
25// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
26// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
27// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
28// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
29// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
30// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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33// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
34// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35//
36// Authors: Gabe Black
37
38////////////////////////////////////////////////////////////////////
39//
40// Bitfield definitions.
41//
42
43//REX prefix
44def bitfield REX rex;
45def bitfield REX_PRESENT rex.present;
46def bitfield REX_W rex.w;
47def bitfield REX_R rex.r;
48def bitfield REX_X rex.x;
49def bitfield REX_B rex.b;
50
51//Legacy prefixes
52def bitfield LEGACY legacy;
53def bitfield LEGACY_DECODEVAL legacy.decodeVal;
54def bitfield LEGACY_REPNE legacy.repne;
55def bitfield LEGACY_REP legacy.rep;
56def bitfield LEGACY_LOCK legacy.lock;
57def bitfield LEGACY_OP legacy.op;
58def bitfield LEGACY_ADDR legacy.addr;
59def bitfield LEGACY_SEG legacy.seg;
60
61// Pieces of the opcode
62def bitfield OPCODE_NUM opcode.num;
63def bitfield OPCODE_PREFIXA opcode.prefixA;
64def bitfield OPCODE_PREFIXB opcode.prefixB;
65def bitfield OPCODE_OP opcode.op;
66//The top 5 bits of the opcode tend to split the instructions into groups
67def bitfield OPCODE_OP_TOP5 opcode.op.top5;
68def bitfield OPCODE_OP_BOTTOM3 opcode.op.bottom3;
69
70// Immediate fields
71def bitfield IMMEDIATE immediate;
72def bitfield DISPLACEMENT displacement;
73
74//Modifier bytes
75def bitfield MODRM modRM;
76def bitfield MODRM_MOD modRM.mod;
77def bitfield MODRM_REG modRM.reg;
78def bitfield MODRM_RM modRM.rm;
79
80def bitfield SIB sib;
81def bitfield SIB_SCALE sib.scale;
82def bitfield SIB_INDEX sib.index;
83def bitfield SIB_BASE sib.base;
84
85def bitfield OPSIZE opSize;
86def bitfield ADDRSIZE addrSize;
87def bitfield STACKSIZE stackSize;
88
89def bitfield MODE mode;
90def bitfield MODE_MODE mode.mode;
91def bitfield MODE_SUBMODE mode.submode;
92