LLVM  10.0.0svn
X86DisassemblerDecoderCommon.h
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1 //===-- X86DisassemblerDecoderCommon.h - Disassembler decoder ---*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file is part of the X86 Disassembler.
10 // It contains common definitions used by both the disassembler and the table
11 // generator.
12 // Documentation for the disassembler can be found in X86Disassembler.h.
13 //
14 //===----------------------------------------------------------------------===//
15 
16 #ifndef LLVM_LIB_TARGET_X86_DISASSEMBLER_X86DISASSEMBLERDECODERCOMMON_H
17 #define LLVM_LIB_TARGET_X86_DISASSEMBLER_X86DISASSEMBLERDECODERCOMMON_H
18 
19 #include "llvm/Support/DataTypes.h"
20 
21 namespace llvm {
22 namespace X86Disassembler {
23 
24 #define INSTRUCTIONS_SYM x86DisassemblerInstrSpecifiers
25 #define CONTEXTS_SYM x86DisassemblerContexts
26 #define ONEBYTE_SYM x86DisassemblerOneByteOpcodes
27 #define TWOBYTE_SYM x86DisassemblerTwoByteOpcodes
28 #define THREEBYTE38_SYM x86DisassemblerThreeByte38Opcodes
29 #define THREEBYTE3A_SYM x86DisassemblerThreeByte3AOpcodes
30 #define XOP8_MAP_SYM x86DisassemblerXOP8Opcodes
31 #define XOP9_MAP_SYM x86DisassemblerXOP9Opcodes
32 #define XOPA_MAP_SYM x86DisassemblerXOPAOpcodes
33 #define THREEDNOW_MAP_SYM x86Disassembler3DNowOpcodes
34 
35 #define INSTRUCTIONS_STR "x86DisassemblerInstrSpecifiers"
36 #define CONTEXTS_STR "x86DisassemblerContexts"
37 #define ONEBYTE_STR "x86DisassemblerOneByteOpcodes"
38 #define TWOBYTE_STR "x86DisassemblerTwoByteOpcodes"
39 #define THREEBYTE38_STR "x86DisassemblerThreeByte38Opcodes"
40 #define THREEBYTE3A_STR "x86DisassemblerThreeByte3AOpcodes"
41 #define XOP8_MAP_STR "x86DisassemblerXOP8Opcodes"
42 #define XOP9_MAP_STR "x86DisassemblerXOP9Opcodes"
43 #define XOPA_MAP_STR "x86DisassemblerXOPAOpcodes"
44 #define THREEDNOW_MAP_STR "x86Disassembler3DNowOpcodes"
45 
46 // Attributes of an instruction that must be known before the opcode can be
47 // processed correctly. Most of these indicate the presence of particular
48 // prefixes, but ATTR_64BIT is simply an attribute of the decoding context.
50  ATTR_NONE = 0x00,
51  ATTR_64BIT = 0x1 << 0,
52  ATTR_XS = 0x1 << 1,
53  ATTR_XD = 0x1 << 2,
54  ATTR_REXW = 0x1 << 3,
55  ATTR_OPSIZE = 0x1 << 4,
56  ATTR_ADSIZE = 0x1 << 5,
57  ATTR_VEX = 0x1 << 6,
58  ATTR_VEXL = 0x1 << 7,
59  ATTR_EVEX = 0x1 << 8,
60  ATTR_EVEXL2 = 0x1 << 9,
61  ATTR_EVEXK = 0x1 << 10,
62  ATTR_EVEXKZ = 0x1 << 11,
63  ATTR_EVEXB = 0x1 << 12,
64  ATTR_max = 0x1 << 13,
65 };
66 
67 // Combinations of the above attributes that are relevant to instruction
68 // decode. Although other combinations are possible, they can be reduced to
69 // these without affecting the ultimately decoded instruction.
70 
71 // Class name Rank Rationale for rank assignment
72 #define INSTRUCTION_CONTEXTS \
73  ENUM_ENTRY(IC, 0, "says nothing about the instruction") \
74  ENUM_ENTRY(IC_64BIT, 1, "says the instruction applies in " \
75  "64-bit mode but no more") \
76  ENUM_ENTRY(IC_OPSIZE, 3, "requires an OPSIZE prefix, so " \
77  "operands change width") \
78  ENUM_ENTRY(IC_ADSIZE, 3, "requires an ADSIZE prefix, so " \
79  "operands change width") \
80  ENUM_ENTRY(IC_OPSIZE_ADSIZE, 4, "requires ADSIZE and OPSIZE prefixes") \
81  ENUM_ENTRY(IC_XD, 2, "may say something about the opcode " \
82  "but not the operands") \
83  ENUM_ENTRY(IC_XS, 2, "may say something about the opcode " \
84  "but not the operands") \
85  ENUM_ENTRY(IC_XD_OPSIZE, 3, "requires an OPSIZE prefix, so " \
86  "operands change width") \
87  ENUM_ENTRY(IC_XS_OPSIZE, 3, "requires an OPSIZE prefix, so " \
88  "operands change width") \
89  ENUM_ENTRY(IC_XD_ADSIZE, 3, "requires an ADSIZE prefix, so " \
90  "operands change width") \
91  ENUM_ENTRY(IC_XS_ADSIZE, 3, "requires an ADSIZE prefix, so " \
92  "operands change width") \
93  ENUM_ENTRY(IC_64BIT_REXW, 5, "requires a REX.W prefix, so operands "\
94  "change width; overrides IC_OPSIZE") \
95  ENUM_ENTRY(IC_64BIT_REXW_ADSIZE, 6, "requires a REX.W prefix and 0x67 " \
96  "prefix") \
97  ENUM_ENTRY(IC_64BIT_OPSIZE, 3, "Just as meaningful as IC_OPSIZE") \
98  ENUM_ENTRY(IC_64BIT_ADSIZE, 3, "Just as meaningful as IC_ADSIZE") \
99  ENUM_ENTRY(IC_64BIT_OPSIZE_ADSIZE, 4, "Just as meaningful as IC_OPSIZE/" \
100  "IC_ADSIZE") \
101  ENUM_ENTRY(IC_64BIT_XD, 6, "XD instructions are SSE; REX.W is " \
102  "secondary") \
103  ENUM_ENTRY(IC_64BIT_XS, 6, "Just as meaningful as IC_64BIT_XD") \
104  ENUM_ENTRY(IC_64BIT_XD_OPSIZE, 3, "Just as meaningful as IC_XD_OPSIZE") \
105  ENUM_ENTRY(IC_64BIT_XS_OPSIZE, 3, "Just as meaningful as IC_XS_OPSIZE") \
106  ENUM_ENTRY(IC_64BIT_XD_ADSIZE, 3, "Just as meaningful as IC_XD_ADSIZE") \
107  ENUM_ENTRY(IC_64BIT_XS_ADSIZE, 3, "Just as meaningful as IC_XS_ADSIZE") \
108  ENUM_ENTRY(IC_64BIT_REXW_XS, 7, "OPSIZE could mean a different " \
109  "opcode") \
110  ENUM_ENTRY(IC_64BIT_REXW_XD, 7, "Just as meaningful as " \
111  "IC_64BIT_REXW_XS") \
112  ENUM_ENTRY(IC_64BIT_REXW_OPSIZE, 8, "The Dynamic Duo! Prefer over all " \
113  "else because this changes most " \
114  "operands' meaning") \
115  ENUM_ENTRY(IC_VEX, 1, "requires a VEX prefix") \
116  ENUM_ENTRY(IC_VEX_XS, 2, "requires VEX and the XS prefix") \
117  ENUM_ENTRY(IC_VEX_XD, 2, "requires VEX and the XD prefix") \
118  ENUM_ENTRY(IC_VEX_OPSIZE, 2, "requires VEX and the OpSize prefix") \
119  ENUM_ENTRY(IC_VEX_W, 3, "requires VEX and the W prefix") \
120  ENUM_ENTRY(IC_VEX_W_XS, 4, "requires VEX, W, and XS prefix") \
121  ENUM_ENTRY(IC_VEX_W_XD, 4, "requires VEX, W, and XD prefix") \
122  ENUM_ENTRY(IC_VEX_W_OPSIZE, 4, "requires VEX, W, and OpSize") \
123  ENUM_ENTRY(IC_VEX_L, 3, "requires VEX and the L prefix") \
124  ENUM_ENTRY(IC_VEX_L_XS, 4, "requires VEX and the L and XS prefix")\
125  ENUM_ENTRY(IC_VEX_L_XD, 4, "requires VEX and the L and XD prefix")\
126  ENUM_ENTRY(IC_VEX_L_OPSIZE, 4, "requires VEX, L, and OpSize") \
127  ENUM_ENTRY(IC_VEX_L_W, 4, "requires VEX, L and W") \
128  ENUM_ENTRY(IC_VEX_L_W_XS, 5, "requires VEX, L, W and XS prefix") \
129  ENUM_ENTRY(IC_VEX_L_W_XD, 5, "requires VEX, L, W and XD prefix") \
130  ENUM_ENTRY(IC_VEX_L_W_OPSIZE, 5, "requires VEX, L, W and OpSize") \
131  ENUM_ENTRY(IC_EVEX, 1, "requires an EVEX prefix") \
132  ENUM_ENTRY(IC_EVEX_XS, 2, "requires EVEX and the XS prefix") \
133  ENUM_ENTRY(IC_EVEX_XD, 2, "requires EVEX and the XD prefix") \
134  ENUM_ENTRY(IC_EVEX_OPSIZE, 2, "requires EVEX and the OpSize prefix") \
135  ENUM_ENTRY(IC_EVEX_W, 3, "requires EVEX and the W prefix") \
136  ENUM_ENTRY(IC_EVEX_W_XS, 4, "requires EVEX, W, and XS prefix") \
137  ENUM_ENTRY(IC_EVEX_W_XD, 4, "requires EVEX, W, and XD prefix") \
138  ENUM_ENTRY(IC_EVEX_W_OPSIZE, 4, "requires EVEX, W, and OpSize") \
139  ENUM_ENTRY(IC_EVEX_L, 3, "requires EVEX and the L prefix") \
140  ENUM_ENTRY(IC_EVEX_L_XS, 4, "requires EVEX and the L and XS prefix")\
141  ENUM_ENTRY(IC_EVEX_L_XD, 4, "requires EVEX and the L and XD prefix")\
142  ENUM_ENTRY(IC_EVEX_L_OPSIZE, 4, "requires EVEX, L, and OpSize") \
143  ENUM_ENTRY(IC_EVEX_L_W, 3, "requires EVEX, L and W") \
144  ENUM_ENTRY(IC_EVEX_L_W_XS, 4, "requires EVEX, L, W and XS prefix") \
145  ENUM_ENTRY(IC_EVEX_L_W_XD, 4, "requires EVEX, L, W and XD prefix") \
146  ENUM_ENTRY(IC_EVEX_L_W_OPSIZE, 4, "requires EVEX, L, W and OpSize") \
147  ENUM_ENTRY(IC_EVEX_L2, 3, "requires EVEX and the L2 prefix") \
148  ENUM_ENTRY(IC_EVEX_L2_XS, 4, "requires EVEX and the L2 and XS prefix")\
149  ENUM_ENTRY(IC_EVEX_L2_XD, 4, "requires EVEX and the L2 and XD prefix")\
150  ENUM_ENTRY(IC_EVEX_L2_OPSIZE, 4, "requires EVEX, L2, and OpSize") \
151  ENUM_ENTRY(IC_EVEX_L2_W, 3, "requires EVEX, L2 and W") \
152  ENUM_ENTRY(IC_EVEX_L2_W_XS, 4, "requires EVEX, L2, W and XS prefix") \
153  ENUM_ENTRY(IC_EVEX_L2_W_XD, 4, "requires EVEX, L2, W and XD prefix") \
154  ENUM_ENTRY(IC_EVEX_L2_W_OPSIZE, 4, "requires EVEX, L2, W and OpSize") \
155  ENUM_ENTRY(IC_EVEX_K, 1, "requires an EVEX_K prefix") \
156  ENUM_ENTRY(IC_EVEX_XS_K, 2, "requires EVEX_K and the XS prefix") \
157  ENUM_ENTRY(IC_EVEX_XD_K, 2, "requires EVEX_K and the XD prefix") \
158  ENUM_ENTRY(IC_EVEX_OPSIZE_K, 2, "requires EVEX_K and the OpSize prefix") \
159  ENUM_ENTRY(IC_EVEX_W_K, 3, "requires EVEX_K and the W prefix") \
160  ENUM_ENTRY(IC_EVEX_W_XS_K, 4, "requires EVEX_K, W, and XS prefix") \
161  ENUM_ENTRY(IC_EVEX_W_XD_K, 4, "requires EVEX_K, W, and XD prefix") \
162  ENUM_ENTRY(IC_EVEX_W_OPSIZE_K, 4, "requires EVEX_K, W, and OpSize") \
163  ENUM_ENTRY(IC_EVEX_L_K, 3, "requires EVEX_K and the L prefix") \
164  ENUM_ENTRY(IC_EVEX_L_XS_K, 4, "requires EVEX_K and the L and XS prefix")\
165  ENUM_ENTRY(IC_EVEX_L_XD_K, 4, "requires EVEX_K and the L and XD prefix")\
166  ENUM_ENTRY(IC_EVEX_L_OPSIZE_K, 4, "requires EVEX_K, L, and OpSize") \
167  ENUM_ENTRY(IC_EVEX_L_W_K, 3, "requires EVEX_K, L and W") \
168  ENUM_ENTRY(IC_EVEX_L_W_XS_K, 4, "requires EVEX_K, L, W and XS prefix") \
169  ENUM_ENTRY(IC_EVEX_L_W_XD_K, 4, "requires EVEX_K, L, W and XD prefix") \
170  ENUM_ENTRY(IC_EVEX_L_W_OPSIZE_K, 4, "requires EVEX_K, L, W and OpSize") \
171  ENUM_ENTRY(IC_EVEX_L2_K, 3, "requires EVEX_K and the L2 prefix") \
172  ENUM_ENTRY(IC_EVEX_L2_XS_K, 4, "requires EVEX_K and the L2 and XS prefix")\
173  ENUM_ENTRY(IC_EVEX_L2_XD_K, 4, "requires EVEX_K and the L2 and XD prefix")\
174  ENUM_ENTRY(IC_EVEX_L2_OPSIZE_K, 4, "requires EVEX_K, L2, and OpSize") \
175  ENUM_ENTRY(IC_EVEX_L2_W_K, 3, "requires EVEX_K, L2 and W") \
176  ENUM_ENTRY(IC_EVEX_L2_W_XS_K, 4, "requires EVEX_K, L2, W and XS prefix") \
177  ENUM_ENTRY(IC_EVEX_L2_W_XD_K, 4, "requires EVEX_K, L2, W and XD prefix") \
178  ENUM_ENTRY(IC_EVEX_L2_W_OPSIZE_K, 4, "requires EVEX_K, L2, W and OpSize") \
179  ENUM_ENTRY(IC_EVEX_B, 1, "requires an EVEX_B prefix") \
180  ENUM_ENTRY(IC_EVEX_XS_B, 2, "requires EVEX_B and the XS prefix") \
181  ENUM_ENTRY(IC_EVEX_XD_B, 2, "requires EVEX_B and the XD prefix") \
182  ENUM_ENTRY(IC_EVEX_OPSIZE_B, 2, "requires EVEX_B and the OpSize prefix") \
183  ENUM_ENTRY(IC_EVEX_W_B, 3, "requires EVEX_B and the W prefix") \
184  ENUM_ENTRY(IC_EVEX_W_XS_B, 4, "requires EVEX_B, W, and XS prefix") \
185  ENUM_ENTRY(IC_EVEX_W_XD_B, 4, "requires EVEX_B, W, and XD prefix") \
186  ENUM_ENTRY(IC_EVEX_W_OPSIZE_B, 4, "requires EVEX_B, W, and OpSize") \
187  ENUM_ENTRY(IC_EVEX_L_B, 3, "requires EVEX_B and the L prefix") \
188  ENUM_ENTRY(IC_EVEX_L_XS_B, 4, "requires EVEX_B and the L and XS prefix")\
189  ENUM_ENTRY(IC_EVEX_L_XD_B, 4, "requires EVEX_B and the L and XD prefix")\
190  ENUM_ENTRY(IC_EVEX_L_OPSIZE_B, 4, "requires EVEX_B, L, and OpSize") \
191  ENUM_ENTRY(IC_EVEX_L_W_B, 3, "requires EVEX_B, L and W") \
192  ENUM_ENTRY(IC_EVEX_L_W_XS_B, 4, "requires EVEX_B, L, W and XS prefix") \
193  ENUM_ENTRY(IC_EVEX_L_W_XD_B, 4, "requires EVEX_B, L, W and XD prefix") \
194  ENUM_ENTRY(IC_EVEX_L_W_OPSIZE_B, 4, "requires EVEX_B, L, W and OpSize") \
195  ENUM_ENTRY(IC_EVEX_L2_B, 3, "requires EVEX_B and the L2 prefix") \
196  ENUM_ENTRY(IC_EVEX_L2_XS_B, 4, "requires EVEX_B and the L2 and XS prefix")\
197  ENUM_ENTRY(IC_EVEX_L2_XD_B, 4, "requires EVEX_B and the L2 and XD prefix")\
198  ENUM_ENTRY(IC_EVEX_L2_OPSIZE_B, 4, "requires EVEX_B, L2, and OpSize") \
199  ENUM_ENTRY(IC_EVEX_L2_W_B, 3, "requires EVEX_B, L2 and W") \
200  ENUM_ENTRY(IC_EVEX_L2_W_XS_B, 4, "requires EVEX_B, L2, W and XS prefix") \
201  ENUM_ENTRY(IC_EVEX_L2_W_XD_B, 4, "requires EVEX_B, L2, W and XD prefix") \
202  ENUM_ENTRY(IC_EVEX_L2_W_OPSIZE_B, 4, "requires EVEX_B, L2, W and OpSize") \
203  ENUM_ENTRY(IC_EVEX_K_B, 1, "requires EVEX_B and EVEX_K prefix") \
204  ENUM_ENTRY(IC_EVEX_XS_K_B, 2, "requires EVEX_B, EVEX_K and the XS prefix") \
205  ENUM_ENTRY(IC_EVEX_XD_K_B, 2, "requires EVEX_B, EVEX_K and the XD prefix") \
206  ENUM_ENTRY(IC_EVEX_OPSIZE_K_B, 2, "requires EVEX_B, EVEX_K and the OpSize prefix") \
207  ENUM_ENTRY(IC_EVEX_W_K_B, 3, "requires EVEX_B, EVEX_K and the W prefix") \
208  ENUM_ENTRY(IC_EVEX_W_XS_K_B, 4, "requires EVEX_B, EVEX_K, W, and XS prefix") \
209  ENUM_ENTRY(IC_EVEX_W_XD_K_B, 4, "requires EVEX_B, EVEX_K, W, and XD prefix") \
210  ENUM_ENTRY(IC_EVEX_W_OPSIZE_K_B, 4, "requires EVEX_B, EVEX_K, W, and OpSize") \
211  ENUM_ENTRY(IC_EVEX_L_K_B, 3, "requires EVEX_B, EVEX_K and the L prefix") \
212  ENUM_ENTRY(IC_EVEX_L_XS_K_B, 4, "requires EVEX_B, EVEX_K and the L and XS prefix")\
213  ENUM_ENTRY(IC_EVEX_L_XD_K_B, 4, "requires EVEX_B, EVEX_K and the L and XD prefix")\
214  ENUM_ENTRY(IC_EVEX_L_OPSIZE_K_B, 4, "requires EVEX_B, EVEX_K, L, and OpSize") \
215  ENUM_ENTRY(IC_EVEX_L_W_K_B, 3, "requires EVEX_B, EVEX_K, L and W") \
216  ENUM_ENTRY(IC_EVEX_L_W_XS_K_B, 4, "requires EVEX_B, EVEX_K, L, W and XS prefix") \
217  ENUM_ENTRY(IC_EVEX_L_W_XD_K_B, 4, "requires EVEX_B, EVEX_K, L, W and XD prefix") \
218  ENUM_ENTRY(IC_EVEX_L_W_OPSIZE_K_B,4, "requires EVEX_B, EVEX_K, L, W and OpSize") \
219  ENUM_ENTRY(IC_EVEX_L2_K_B, 3, "requires EVEX_B, EVEX_K and the L2 prefix") \
220  ENUM_ENTRY(IC_EVEX_L2_XS_K_B, 4, "requires EVEX_B, EVEX_K and the L2 and XS prefix")\
221  ENUM_ENTRY(IC_EVEX_L2_XD_K_B, 4, "requires EVEX_B, EVEX_K and the L2 and XD prefix")\
222  ENUM_ENTRY(IC_EVEX_L2_OPSIZE_K_B, 4, "requires EVEX_B, EVEX_K, L2, and OpSize") \
223  ENUM_ENTRY(IC_EVEX_L2_W_K_B, 3, "requires EVEX_B, EVEX_K, L2 and W") \
224  ENUM_ENTRY(IC_EVEX_L2_W_XS_K_B, 4, "requires EVEX_B, EVEX_K, L2, W and XS prefix") \
225  ENUM_ENTRY(IC_EVEX_L2_W_XD_K_B, 4, "requires EVEX_B, EVEX_K, L2, W and XD prefix") \
226  ENUM_ENTRY(IC_EVEX_L2_W_OPSIZE_K_B,4, "requires EVEX_B, EVEX_K, L2, W and OpSize") \
227  ENUM_ENTRY(IC_EVEX_KZ_B, 1, "requires EVEX_B and EVEX_KZ prefix") \
228  ENUM_ENTRY(IC_EVEX_XS_KZ_B, 2, "requires EVEX_B, EVEX_KZ and the XS prefix") \
229  ENUM_ENTRY(IC_EVEX_XD_KZ_B, 2, "requires EVEX_B, EVEX_KZ and the XD prefix") \
230  ENUM_ENTRY(IC_EVEX_OPSIZE_KZ_B, 2, "requires EVEX_B, EVEX_KZ and the OpSize prefix") \
231  ENUM_ENTRY(IC_EVEX_W_KZ_B, 3, "requires EVEX_B, EVEX_KZ and the W prefix") \
232  ENUM_ENTRY(IC_EVEX_W_XS_KZ_B, 4, "requires EVEX_B, EVEX_KZ, W, and XS prefix") \
233  ENUM_ENTRY(IC_EVEX_W_XD_KZ_B, 4, "requires EVEX_B, EVEX_KZ, W, and XD prefix") \
234  ENUM_ENTRY(IC_EVEX_W_OPSIZE_KZ_B, 4, "requires EVEX_B, EVEX_KZ, W, and OpSize") \
235  ENUM_ENTRY(IC_EVEX_L_KZ_B, 3, "requires EVEX_B, EVEX_KZ and the L prefix") \
236  ENUM_ENTRY(IC_EVEX_L_XS_KZ_B, 4, "requires EVEX_B, EVEX_KZ and the L and XS prefix")\
237  ENUM_ENTRY(IC_EVEX_L_XD_KZ_B, 4, "requires EVEX_B, EVEX_KZ and the L and XD prefix")\
238  ENUM_ENTRY(IC_EVEX_L_OPSIZE_KZ_B, 4, "requires EVEX_B, EVEX_KZ, L, and OpSize") \
239  ENUM_ENTRY(IC_EVEX_L_W_KZ_B, 3, "requires EVEX_B, EVEX_KZ, L and W") \
240  ENUM_ENTRY(IC_EVEX_L_W_XS_KZ_B, 4, "requires EVEX_B, EVEX_KZ, L, W and XS prefix") \
241  ENUM_ENTRY(IC_EVEX_L_W_XD_KZ_B, 4, "requires EVEX_B, EVEX_KZ, L, W and XD prefix") \
242  ENUM_ENTRY(IC_EVEX_L_W_OPSIZE_KZ_B, 4, "requires EVEX_B, EVEX_KZ, L, W and OpSize") \
243  ENUM_ENTRY(IC_EVEX_L2_KZ_B, 3, "requires EVEX_B, EVEX_KZ and the L2 prefix") \
244  ENUM_ENTRY(IC_EVEX_L2_XS_KZ_B, 4, "requires EVEX_B, EVEX_KZ and the L2 and XS prefix")\
245  ENUM_ENTRY(IC_EVEX_L2_XD_KZ_B, 4, "requires EVEX_B, EVEX_KZ and the L2 and XD prefix")\
246  ENUM_ENTRY(IC_EVEX_L2_OPSIZE_KZ_B, 4, "requires EVEX_B, EVEX_KZ, L2, and OpSize") \
247  ENUM_ENTRY(IC_EVEX_L2_W_KZ_B, 3, "requires EVEX_B, EVEX_KZ, L2 and W") \
248  ENUM_ENTRY(IC_EVEX_L2_W_XS_KZ_B, 4, "requires EVEX_B, EVEX_KZ, L2, W and XS prefix") \
249  ENUM_ENTRY(IC_EVEX_L2_W_XD_KZ_B, 4, "requires EVEX_B, EVEX_KZ, L2, W and XD prefix") \
250  ENUM_ENTRY(IC_EVEX_L2_W_OPSIZE_KZ_B, 4, "requires EVEX_B, EVEX_KZ, L2, W and OpSize") \
251  ENUM_ENTRY(IC_EVEX_KZ, 1, "requires an EVEX_KZ prefix") \
252  ENUM_ENTRY(IC_EVEX_XS_KZ, 2, "requires EVEX_KZ and the XS prefix") \
253  ENUM_ENTRY(IC_EVEX_XD_KZ, 2, "requires EVEX_KZ and the XD prefix") \
254  ENUM_ENTRY(IC_EVEX_OPSIZE_KZ, 2, "requires EVEX_KZ and the OpSize prefix") \
255  ENUM_ENTRY(IC_EVEX_W_KZ, 3, "requires EVEX_KZ and the W prefix") \
256  ENUM_ENTRY(IC_EVEX_W_XS_KZ, 4, "requires EVEX_KZ, W, and XS prefix") \
257  ENUM_ENTRY(IC_EVEX_W_XD_KZ, 4, "requires EVEX_KZ, W, and XD prefix") \
258  ENUM_ENTRY(IC_EVEX_W_OPSIZE_KZ, 4, "requires EVEX_KZ, W, and OpSize") \
259  ENUM_ENTRY(IC_EVEX_L_KZ, 3, "requires EVEX_KZ and the L prefix") \
260  ENUM_ENTRY(IC_EVEX_L_XS_KZ, 4, "requires EVEX_KZ and the L and XS prefix")\
261  ENUM_ENTRY(IC_EVEX_L_XD_KZ, 4, "requires EVEX_KZ and the L and XD prefix")\
262  ENUM_ENTRY(IC_EVEX_L_OPSIZE_KZ, 4, "requires EVEX_KZ, L, and OpSize") \
263  ENUM_ENTRY(IC_EVEX_L_W_KZ, 3, "requires EVEX_KZ, L and W") \
264  ENUM_ENTRY(IC_EVEX_L_W_XS_KZ, 4, "requires EVEX_KZ, L, W and XS prefix") \
265  ENUM_ENTRY(IC_EVEX_L_W_XD_KZ, 4, "requires EVEX_KZ, L, W and XD prefix") \
266  ENUM_ENTRY(IC_EVEX_L_W_OPSIZE_KZ, 4, "requires EVEX_KZ, L, W and OpSize") \
267  ENUM_ENTRY(IC_EVEX_L2_KZ, 3, "requires EVEX_KZ and the L2 prefix") \
268  ENUM_ENTRY(IC_EVEX_L2_XS_KZ, 4, "requires EVEX_KZ and the L2 and XS prefix")\
269  ENUM_ENTRY(IC_EVEX_L2_XD_KZ, 4, "requires EVEX_KZ and the L2 and XD prefix")\
270  ENUM_ENTRY(IC_EVEX_L2_OPSIZE_KZ, 4, "requires EVEX_KZ, L2, and OpSize") \
271  ENUM_ENTRY(IC_EVEX_L2_W_KZ, 3, "requires EVEX_KZ, L2 and W") \
272  ENUM_ENTRY(IC_EVEX_L2_W_XS_KZ, 4, "requires EVEX_KZ, L2, W and XS prefix") \
273  ENUM_ENTRY(IC_EVEX_L2_W_XD_KZ, 4, "requires EVEX_KZ, L2, W and XD prefix") \
274  ENUM_ENTRY(IC_EVEX_L2_W_OPSIZE_KZ, 4, "requires EVEX_KZ, L2, W and OpSize")
275 
276 #define ENUM_ENTRY(n, r, d) n,
280 };
281 #undef ENUM_ENTRY
282 
283 // Opcode types, which determine which decode table to use, both in the Intel
284 // manual and also for the decoder.
286  ONEBYTE = 0,
287  TWOBYTE = 1,
290  XOP8_MAP = 4,
291  XOP9_MAP = 5,
292  XOPA_MAP = 6,
294 };
295 
296 // The following structs are used for the hierarchical decode table. After
297 // determining the instruction's class (i.e., which IC_* constant applies to
298 // it), the decoder reads the opcode. Some instructions require specific
299 // values of the ModR/M byte, so the ModR/M byte indexes into the final table.
300 //
301 // If a ModR/M byte is not required, "required" is left unset, and the values
302 // for each instructionID are identical.
303 typedef uint16_t InstrUID;
304 
305 // ModRMDecisionType - describes the type of ModR/M decision, allowing the
306 // consumer to determine the number of entries in it.
307 //
308 // MODRM_ONEENTRY - No matter what the value of the ModR/M byte is, the decoded
309 // instruction is the same.
310 // MODRM_SPLITRM - If the ModR/M byte is between 0x00 and 0xbf, the opcode
311 // corresponds to one instruction; otherwise, it corresponds to
312 // a different instruction.
313 // MODRM_SPLITMISC- If the ModR/M byte is between 0x00 and 0xbf, ModR/M byte
314 // divided by 8 is used to select instruction; otherwise, each
315 // value of the ModR/M byte could correspond to a different
316 // instruction.
317 // MODRM_SPLITREG - ModR/M byte divided by 8 is used to select instruction. This
318 // corresponds to instructions that use reg field as opcode
319 // MODRM_FULL - Potentially, each value of the ModR/M byte could correspond
320 // to a different instruction.
321 #define MODRMTYPES \
322  ENUM_ENTRY(MODRM_ONEENTRY) \
323  ENUM_ENTRY(MODRM_SPLITRM) \
324  ENUM_ENTRY(MODRM_SPLITMISC) \
325  ENUM_ENTRY(MODRM_SPLITREG) \
326  ENUM_ENTRY(MODRM_FULL)
327 
328 #define ENUM_ENTRY(n) n,
330  MODRMTYPES
332 };
333 #undef ENUM_ENTRY
334 
335 #define CASE_ENCODING_RM \
336  case ENCODING_RM: \
337  case ENCODING_RM_CD2: \
338  case ENCODING_RM_CD4: \
339  case ENCODING_RM_CD8: \
340  case ENCODING_RM_CD16: \
341  case ENCODING_RM_CD32: \
342  case ENCODING_RM_CD64
343 
344 #define CASE_ENCODING_VSIB \
345  case ENCODING_VSIB: \
346  case ENCODING_VSIB_CD2: \
347  case ENCODING_VSIB_CD4: \
348  case ENCODING_VSIB_CD8: \
349  case ENCODING_VSIB_CD16: \
350  case ENCODING_VSIB_CD32: \
351  case ENCODING_VSIB_CD64
352 
353 // Physical encodings of instruction operands.
354 #define ENCODINGS \
355  ENUM_ENTRY(ENCODING_NONE, "") \
356  ENUM_ENTRY(ENCODING_REG, "Register operand in ModR/M byte.") \
357  ENUM_ENTRY(ENCODING_RM, "R/M operand in ModR/M byte.") \
358  ENUM_ENTRY(ENCODING_RM_CD2, "R/M operand with CDisp scaling of 2") \
359  ENUM_ENTRY(ENCODING_RM_CD4, "R/M operand with CDisp scaling of 4") \
360  ENUM_ENTRY(ENCODING_RM_CD8, "R/M operand with CDisp scaling of 8") \
361  ENUM_ENTRY(ENCODING_RM_CD16,"R/M operand with CDisp scaling of 16") \
362  ENUM_ENTRY(ENCODING_RM_CD32,"R/M operand with CDisp scaling of 32") \
363  ENUM_ENTRY(ENCODING_RM_CD64,"R/M operand with CDisp scaling of 64") \
364  ENUM_ENTRY(ENCODING_VSIB, "VSIB operand in ModR/M byte.") \
365  ENUM_ENTRY(ENCODING_VSIB_CD2, "VSIB operand with CDisp scaling of 2") \
366  ENUM_ENTRY(ENCODING_VSIB_CD4, "VSIB operand with CDisp scaling of 4") \
367  ENUM_ENTRY(ENCODING_VSIB_CD8, "VSIB operand with CDisp scaling of 8") \
368  ENUM_ENTRY(ENCODING_VSIB_CD16,"VSIB operand with CDisp scaling of 16") \
369  ENUM_ENTRY(ENCODING_VSIB_CD32,"VSIB operand with CDisp scaling of 32") \
370  ENUM_ENTRY(ENCODING_VSIB_CD64,"VSIB operand with CDisp scaling of 64") \
371  ENUM_ENTRY(ENCODING_VVVV, "Register operand in VEX.vvvv byte.") \
372  ENUM_ENTRY(ENCODING_WRITEMASK, "Register operand in EVEX.aaa byte.") \
373  ENUM_ENTRY(ENCODING_IB, "1-byte immediate") \
374  ENUM_ENTRY(ENCODING_IW, "2-byte") \
375  ENUM_ENTRY(ENCODING_ID, "4-byte") \
376  ENUM_ENTRY(ENCODING_IO, "8-byte") \
377  ENUM_ENTRY(ENCODING_RB, "(AL..DIL, R8L..R15L) Register code added to " \
378  "the opcode byte") \
379  ENUM_ENTRY(ENCODING_RW, "(AX..DI, R8W..R15W)") \
380  ENUM_ENTRY(ENCODING_RD, "(EAX..EDI, R8D..R15D)") \
381  ENUM_ENTRY(ENCODING_RO, "(RAX..RDI, R8..R15)") \
382  ENUM_ENTRY(ENCODING_FP, "Position on floating-point stack in ModR/M " \
383  "byte.") \
384  \
385  ENUM_ENTRY(ENCODING_Iv, "Immediate of operand size") \
386  ENUM_ENTRY(ENCODING_Ia, "Immediate of address size") \
387  ENUM_ENTRY(ENCODING_IRC, "Immediate for static rounding control") \
388  ENUM_ENTRY(ENCODING_Rv, "Register code of operand size added to the " \
389  "opcode byte") \
390  ENUM_ENTRY(ENCODING_CC, "Condition code encoded in opcode") \
391  ENUM_ENTRY(ENCODING_DUP, "Duplicate of another operand; ID is encoded " \
392  "in type") \
393  ENUM_ENTRY(ENCODING_SI, "Source index; encoded in OpSize/Adsize prefix") \
394  ENUM_ENTRY(ENCODING_DI, "Destination index; encoded in prefixes")
395 
396 #define ENUM_ENTRY(n, d) n,
398  ENCODINGS
400 };
401 #undef ENUM_ENTRY
402 
403 // Semantic interpretations of instruction operands.
404 #define TYPES \
405  ENUM_ENTRY(TYPE_NONE, "") \
406  ENUM_ENTRY(TYPE_REL, "immediate address") \
407  ENUM_ENTRY(TYPE_R8, "1-byte register operand") \
408  ENUM_ENTRY(TYPE_R16, "2-byte") \
409  ENUM_ENTRY(TYPE_R32, "4-byte") \
410  ENUM_ENTRY(TYPE_R64, "8-byte") \
411  ENUM_ENTRY(TYPE_IMM, "immediate operand") \
412  ENUM_ENTRY(TYPE_UIMM8, "1-byte unsigned immediate operand") \
413  ENUM_ENTRY(TYPE_M, "Memory operand") \
414  ENUM_ENTRY(TYPE_MVSIBX, "Memory operand using XMM index") \
415  ENUM_ENTRY(TYPE_MVSIBY, "Memory operand using YMM index") \
416  ENUM_ENTRY(TYPE_MVSIBZ, "Memory operand using ZMM index") \
417  ENUM_ENTRY(TYPE_SRCIDX, "memory at source index") \
418  ENUM_ENTRY(TYPE_DSTIDX, "memory at destination index") \
419  ENUM_ENTRY(TYPE_MOFFS, "memory offset (relative to segment base)") \
420  ENUM_ENTRY(TYPE_ST, "Position on the floating-point stack") \
421  ENUM_ENTRY(TYPE_MM64, "8-byte MMX register") \
422  ENUM_ENTRY(TYPE_XMM, "16-byte") \
423  ENUM_ENTRY(TYPE_YMM, "32-byte") \
424  ENUM_ENTRY(TYPE_ZMM, "64-byte") \
425  ENUM_ENTRY(TYPE_VK, "mask register") \
426  ENUM_ENTRY(TYPE_VK_PAIR, "mask register pair") \
427  ENUM_ENTRY(TYPE_SEGMENTREG, "Segment register operand") \
428  ENUM_ENTRY(TYPE_DEBUGREG, "Debug register operand") \
429  ENUM_ENTRY(TYPE_CONTROLREG, "Control register operand") \
430  ENUM_ENTRY(TYPE_BNDR, "MPX bounds register") \
431  \
432  ENUM_ENTRY(TYPE_Rv, "Register operand of operand size") \
433  ENUM_ENTRY(TYPE_RELv, "Immediate address of operand size") \
434  ENUM_ENTRY(TYPE_DUP0, "Duplicate of operand 0") \
435  ENUM_ENTRY(TYPE_DUP1, "operand 1") \
436  ENUM_ENTRY(TYPE_DUP2, "operand 2") \
437  ENUM_ENTRY(TYPE_DUP3, "operand 3") \
438  ENUM_ENTRY(TYPE_DUP4, "operand 4") \
439 
440 #define ENUM_ENTRY(n, d) n,
442  TYPES
444 };
445 #undef ENUM_ENTRY
446 
447 /// The specification for how to extract and interpret one operand.
449  uint8_t encoding;
450  uint8_t type;
451 };
452 
453 static const unsigned X86_MAX_OPERANDS = 6;
454 
455 /// Decoding mode for the Intel disassembler. 16-bit, 32-bit, and 64-bit mode
456 /// are supported, and represent real mode, IA-32e, and IA-32e in 64-bit mode,
457 /// respectively.
462 };
463 
464 } // namespace X86Disassembler
465 } // namespace llvm
466 
467 #endif
#define MODRMTYPES
This class represents lattice values for constants.
Definition: AllocatorList.h:23
static const unsigned X86_MAX_OPERANDS
#define ENCODINGS
The specification for how to extract and interpret one operand.
#define INSTRUCTION_CONTEXTS
DisassemblerMode
Decoding mode for the Intel disassembler.