summaryrefslogtreecommitdiff
path: root/src/arch/x86/isa/bitfields.isa
blob: b5121f4e36a8453ce9e8a6b0928aa07b7dc02c43 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
// Copyright (c) 2007 The Hewlett-Packard Development Company
// All rights reserved.
//
// The license below extends only to copyright in the software and shall
// not be construed as granting a license to any other intellectual
// property including but not limited to intellectual property relating
// to a hardware implementation of the functionality of the software
// licensed hereunder.  You may use the software subject to the license
// terms below provided that you ensure that this notice is replicated
// unmodified and in its entirety in all distributions of the software,
// modified or unmodified, in source code or in binary form.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met: redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer;
// redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution;
// neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Authors: Gabe Black

////////////////////////////////////////////////////////////////////
//
// Bitfield definitions.
//

//REX prefix
def bitfield REX rex;
def bitfield REX_PRESENT rex.present;
def bitfield REX_W rex.w;
def bitfield REX_R rex.r;
def bitfield REX_X rex.x;
def bitfield REX_B rex.b;

//Legacy prefixes
def bitfield LEGACY legacy;
def bitfield LEGACY_DECODEVAL legacy.decodeVal;
def bitfield LEGACY_REPNE legacy.repne;
def bitfield LEGACY_REP legacy.rep;
def bitfield LEGACY_LOCK legacy.lock;
def bitfield LEGACY_OP legacy.op;
def bitfield LEGACY_ADDR legacy.addr;
def bitfield LEGACY_SEG legacy.seg;

// Pieces of the opcode
def bitfield OPCODE_TYPE opcode.type;
def bitfield OPCODE_OP opcode.op;
//The top 5 bits of the opcode tend to split the instructions into groups
def bitfield OPCODE_OP_TOP5 opcode.op.top5;
def bitfield OPCODE_OP_BOTTOM3 opcode.op.bottom3;

// Immediate fields
def bitfield IMMEDIATE immediate;
def bitfield DISPLACEMENT displacement;

//Modifier bytes
def bitfield MODRM modRM;
def bitfield MODRM_MOD modRM.mod;
def bitfield MODRM_REG modRM.reg;
def bitfield MODRM_RM modRM.rm;

def bitfield SIB sib;
def bitfield SIB_SCALE sib.scale;
def bitfield SIB_INDEX sib.index;
def bitfield SIB_BASE sib.base;

def bitfield OPSIZE opSize;
def bitfield ADDRSIZE addrSize;
def bitfield STACKSIZE stackSize;

def bitfield MODE mode;
def bitfield MODE_MODE mode.mode;
def bitfield MODE_SUBMODE mode.submode;

def bitfield VEX_R vex.first.r;
def bitfield VEX_X vex.first.x;
def bitfield VEX_B vex.first.b;
def bitfield VEX_MAP vex.first.map_select;
def bitfield VEX_W vex.second.w;
def bitfield VEX_VVVV vex.second.vvvv;
def bitfield VEX_L vex.second.l;
def bitfield VEX_PP vex.second.pp;