1 //===-- X86InstrSystem.td - System Instructions ------------*- tablegen -*-===//
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
7 //===----------------------------------------------------------------------===//
9 // This file describes the X86 instructions that are generally used in
10 // privileged modes. These are not typically used by the compiler, but are
11 // supported for the assembler and disassembler.
13 //===----------------------------------------------------------------------===//
15 let SchedRW = [WriteSystem] in {
16 let Defs = [RAX, RDX] in
17 def RDTSC : I<0x31, RawFrm, (outs), (ins), "rdtsc", []>, TB;
19 let Defs = [RAX, RCX, RDX] in
20 def RDTSCP : I<0x01, MRM_F9, (outs), (ins), "rdtscp", []>, TB;
22 // CPU flow control instructions
24 let mayLoad = 1, mayStore = 0, hasSideEffects = 1, isTrap = 1 in {
25 def TRAP : I<0x0B, RawFrm, (outs), (ins), "ud2", [(trap)]>, TB;
27 def UD1Wm : I<0xB9, MRMSrcMem, (outs), (ins GR16:$src1, i16mem:$src2),
28 "ud1{w}\t{$src2, $src1|$src1, $src2}", []>, TB, OpSize16;
29 def UD1Lm : I<0xB9, MRMSrcMem, (outs), (ins GR32:$src1, i32mem:$src2),
30 "ud1{l}\t{$src2, $src1|$src1, $src2}", []>, TB, OpSize32;
31 def UD1Qm : RI<0xB9, MRMSrcMem, (outs), (ins GR64:$src1, i64mem:$src2),
32 "ud1{q}\t{$src2, $src1|$src1, $src2}", []>, TB;
34 def UD1Wr : I<0xB9, MRMSrcReg, (outs), (ins GR16:$src1, GR16:$src2),
35 "ud1{w}\t{$src2, $src1|$src1, $src2}", []>, TB, OpSize16;
36 def UD1Lr : I<0xB9, MRMSrcReg, (outs), (ins GR32:$src1, GR32:$src2),
37 "ud1{l}\t{$src2, $src1|$src1, $src2}", []>, TB, OpSize32;
38 def UD1Qr : RI<0xB9, MRMSrcReg, (outs), (ins GR64:$src1, GR64:$src2),
39 "ud1{q}\t{$src2, $src1|$src1, $src2}", []>, TB;
42 let isTerminator = 1 in
43 def HLT : I<0xF4, RawFrm, (outs), (ins), "hlt", []>;
44 def RSM : I<0xAA, RawFrm, (outs), (ins), "rsm", []>, TB;
46 // Interrupt and SysCall Instructions.
47 let Uses = [EFLAGS] in
48 def INTO : I<0xce, RawFrm, (outs), (ins), "into", []>, Requires<[Not64BitMode]>;
50 def INT3 : I<0xcc, RawFrm, (outs), (ins), "int3", [(int_x86_int (i8 3))]>;
52 def UBSAN_UD1 : PseudoI<(outs), (ins i32imm:$kind), [(ubsantrap (i32 timm:$kind))]>;
53 // The long form of "int $3" turns into int3 as a size optimization.
54 // FIXME: This doesn't work because InstAlias can't match immediate constants.
55 //def : InstAlias<"int\t$3", (INT3)>;
57 def INT : Ii8<0xcd, RawFrm, (outs), (ins u8imm:$trap), "int\t$trap",
58 [(int_x86_int timm:$trap)]>;
61 def SYSCALL : I<0x05, RawFrm, (outs), (ins), "syscall", []>, TB;
62 def SYSRET : I<0x07, RawFrm, (outs), (ins), "sysret{l}", []>, TB;
63 def SYSRET64 :RI<0x07, RawFrm, (outs), (ins), "sysretq", []>, TB,
64 Requires<[In64BitMode]>;
66 def SYSENTER : I<0x34, RawFrm, (outs), (ins), "sysenter", []>, TB;
68 def SYSEXIT : I<0x35, RawFrm, (outs), (ins), "sysexit{l}", []>, TB;
69 def SYSEXIT64 :RI<0x35, RawFrm, (outs), (ins), "sysexitq", []>, TB,
70 Requires<[In64BitMode]>;
73 def : Pat<(debugtrap),
74 (INT3)>, Requires<[NotPS]>;
75 def : Pat<(debugtrap),
76 (INT (i8 0x41))>, Requires<[IsPS]>;
78 //===----------------------------------------------------------------------===//
79 // Input/Output Instructions.
81 let SchedRW = [WriteSystem] in {
82 let Defs = [AL], Uses = [DX] in
83 def IN8rr : I<0xEC, RawFrm, (outs), (ins), "in{b}\t{%dx, %al|al, dx}", []>;
84 let Defs = [AX], Uses = [DX] in
85 def IN16rr : I<0xED, RawFrm, (outs), (ins), "in{w}\t{%dx, %ax|ax, dx}", []>,
87 let Defs = [EAX], Uses = [DX] in
88 def IN32rr : I<0xED, RawFrm, (outs), (ins), "in{l}\t{%dx, %eax|eax, dx}", []>,
92 def IN8ri : Ii8<0xE4, RawFrm, (outs), (ins u8imm:$port),
93 "in{b}\t{$port, %al|al, $port}", []>;
95 def IN16ri : Ii8<0xE5, RawFrm, (outs), (ins u8imm:$port),
96 "in{w}\t{$port, %ax|ax, $port}", []>, OpSize16;
98 def IN32ri : Ii8<0xE5, RawFrm, (outs), (ins u8imm:$port),
99 "in{l}\t{$port, %eax|eax, $port}", []>, OpSize32;
101 let Uses = [DX, AL] in
102 def OUT8rr : I<0xEE, RawFrm, (outs), (ins), "out{b}\t{%al, %dx|dx, al}", []>;
103 let Uses = [DX, AX] in
104 def OUT16rr : I<0xEF, RawFrm, (outs), (ins), "out{w}\t{%ax, %dx|dx, ax}", []>,
106 let Uses = [DX, EAX] in
107 def OUT32rr : I<0xEF, RawFrm, (outs), (ins), "out{l}\t{%eax, %dx|dx, eax}", []>,
111 def OUT8ir : Ii8<0xE6, RawFrm, (outs), (ins u8imm:$port),
112 "out{b}\t{%al, $port|$port, al}", []>;
114 def OUT16ir : Ii8<0xE7, RawFrm, (outs), (ins u8imm:$port),
115 "out{w}\t{%ax, $port|$port, ax}", []>, OpSize16;
117 def OUT32ir : Ii8<0xE7, RawFrm, (outs), (ins u8imm:$port),
118 "out{l}\t{%eax, $port|$port, eax}", []>, OpSize32;
122 //===----------------------------------------------------------------------===//
123 // Moves to and from debug registers
125 let SchedRW = [WriteSystem] in {
126 def MOV32rd : I<0x21, MRMDestReg, (outs GR32:$dst), (ins DEBUG_REG:$src),
127 "mov{l}\t{$src, $dst|$dst, $src}", []>, TB,
128 Requires<[Not64BitMode]>;
129 def MOV64rd : I<0x21, MRMDestReg, (outs GR64:$dst), (ins DEBUG_REG:$src),
130 "mov{q}\t{$src, $dst|$dst, $src}", []>, TB,
131 Requires<[In64BitMode]>;
133 def MOV32dr : I<0x23, MRMSrcReg, (outs DEBUG_REG:$dst), (ins GR32:$src),
134 "mov{l}\t{$src, $dst|$dst, $src}", []>, TB,
135 Requires<[Not64BitMode]>;
136 def MOV64dr : I<0x23, MRMSrcReg, (outs DEBUG_REG:$dst), (ins GR64:$src),
137 "mov{q}\t{$src, $dst|$dst, $src}", []>, TB,
138 Requires<[In64BitMode]>;
141 //===----------------------------------------------------------------------===//
142 // Moves to and from control registers
144 let SchedRW = [WriteSystem] in {
145 def MOV32rc : I<0x20, MRMDestReg, (outs GR32:$dst), (ins CONTROL_REG:$src),
146 "mov{l}\t{$src, $dst|$dst, $src}", []>, TB,
147 Requires<[Not64BitMode]>;
148 def MOV64rc : I<0x20, MRMDestReg, (outs GR64:$dst), (ins CONTROL_REG:$src),
149 "mov{q}\t{$src, $dst|$dst, $src}", []>, TB,
150 Requires<[In64BitMode]>;
152 def MOV32cr : I<0x22, MRMSrcReg, (outs CONTROL_REG:$dst), (ins GR32:$src),
153 "mov{l}\t{$src, $dst|$dst, $src}", []>, TB,
154 Requires<[Not64BitMode]>;
155 def MOV64cr : I<0x22, MRMSrcReg, (outs CONTROL_REG:$dst), (ins GR64:$src),
156 "mov{q}\t{$src, $dst|$dst, $src}", []>, TB,
157 Requires<[In64BitMode]>;
160 //===----------------------------------------------------------------------===//
161 // Segment override instruction prefixes
163 let SchedRW = [WriteNop] in {
164 def CS_PREFIX : I<0x2E, PrefixByte, (outs), (ins), "cs", []>;
165 def SS_PREFIX : I<0x36, PrefixByte, (outs), (ins), "ss", []>;
166 def DS_PREFIX : I<0x3E, PrefixByte, (outs), (ins), "ds", []>;
167 def ES_PREFIX : I<0x26, PrefixByte, (outs), (ins), "es", []>;
168 def FS_PREFIX : I<0x64, PrefixByte, (outs), (ins), "fs", []>;
169 def GS_PREFIX : I<0x65, PrefixByte, (outs), (ins), "gs", []>;
172 //===----------------------------------------------------------------------===//
173 // Address-size override prefixes.
176 let SchedRW = [WriteNop] in {
177 def ADDR16_PREFIX : I<0x67, PrefixByte, (outs), (ins), "addr16", []>,
178 Requires<[In32BitMode]>;
179 def ADDR32_PREFIX : I<0x67, PrefixByte, (outs), (ins), "addr32", []>,
180 Requires<[In64BitMode]>;
183 //===----------------------------------------------------------------------===//
184 // Moves to and from segment registers.
187 let SchedRW = [WriteMove] in {
188 def MOV16rs : I<0x8C, MRMDestReg, (outs GR16:$dst), (ins SEGMENT_REG:$src),
189 "mov{w}\t{$src, $dst|$dst, $src}", []>, OpSize16;
190 def MOV32rs : I<0x8C, MRMDestReg, (outs GR32:$dst), (ins SEGMENT_REG:$src),
191 "mov{l}\t{$src, $dst|$dst, $src}", []>, OpSize32;
192 def MOV64rs : RI<0x8C, MRMDestReg, (outs GR64:$dst), (ins SEGMENT_REG:$src),
193 "mov{q}\t{$src, $dst|$dst, $src}", []>;
194 let mayStore = 1 in {
195 def MOV16ms : I<0x8C, MRMDestMem, (outs), (ins i16mem:$dst, SEGMENT_REG:$src),
196 "mov{w}\t{$src, $dst|$dst, $src}", []>;
198 def MOV16sr : I<0x8E, MRMSrcReg, (outs SEGMENT_REG:$dst), (ins GR16:$src),
199 "mov{w}\t{$src, $dst|$dst, $src}", []>, OpSize16;
200 def MOV32sr : I<0x8E, MRMSrcReg, (outs SEGMENT_REG:$dst), (ins GR32:$src),
201 "mov{l}\t{$src, $dst|$dst, $src}", []>, OpSize32;
202 def MOV64sr : RI<0x8E, MRMSrcReg, (outs SEGMENT_REG:$dst), (ins GR64:$src),
203 "mov{q}\t{$src, $dst|$dst, $src}", []>;
205 def MOV16sm : I<0x8E, MRMSrcMem, (outs SEGMENT_REG:$dst), (ins i16mem:$src),
206 "mov{w}\t{$src, $dst|$dst, $src}", []>;
210 //===----------------------------------------------------------------------===//
211 // Segmentation support instructions.
213 let SchedRW = [WriteSystem] in {
214 def SWAPGS : I<0x01, MRM_F8, (outs), (ins), "swapgs", []>, TB;
217 def LAR16rm : I<0x02, MRMSrcMem, (outs GR16:$dst), (ins i16mem:$src),
218 "lar{w}\t{$src, $dst|$dst, $src}", []>, TB,
220 def LAR16rr : I<0x02, MRMSrcReg, (outs GR16:$dst), (ins GR16orGR32orGR64:$src),
221 "lar{w}\t{$src, $dst|$dst, $src}", []>, TB,
225 def LAR32rm : I<0x02, MRMSrcMem, (outs GR32:$dst), (ins i16mem:$src),
226 "lar{l}\t{$src, $dst|$dst, $src}", []>, TB,
228 def LAR32rr : I<0x02, MRMSrcReg, (outs GR32:$dst), (ins GR16orGR32orGR64:$src),
229 "lar{l}\t{$src, $dst|$dst, $src}", []>, TB,
232 def LAR64rm : RI<0x02, MRMSrcMem, (outs GR64:$dst), (ins i16mem:$src),
233 "lar{q}\t{$src, $dst|$dst, $src}", []>, TB;
234 def LAR64rr : RI<0x02, MRMSrcReg, (outs GR64:$dst), (ins GR16orGR32orGR64:$src),
235 "lar{q}\t{$src, $dst|$dst, $src}", []>, TB;
238 def LSL16rm : I<0x03, MRMSrcMem, (outs GR16:$dst), (ins i16mem:$src),
239 "lsl{w}\t{$src, $dst|$dst, $src}", []>, TB,
241 def LSL16rr : I<0x03, MRMSrcReg, (outs GR16:$dst), (ins GR16orGR32orGR64:$src),
242 "lsl{w}\t{$src, $dst|$dst, $src}", []>, TB,
245 def LSL32rm : I<0x03, MRMSrcMem, (outs GR32:$dst), (ins i16mem:$src),
246 "lsl{l}\t{$src, $dst|$dst, $src}", []>, TB,
248 def LSL32rr : I<0x03, MRMSrcReg, (outs GR32:$dst), (ins GR16orGR32orGR64:$src),
249 "lsl{l}\t{$src, $dst|$dst, $src}", []>, TB,
252 def LSL64rm : RI<0x03, MRMSrcMem, (outs GR64:$dst), (ins i16mem:$src),
253 "lsl{q}\t{$src, $dst|$dst, $src}", []>, TB;
254 def LSL64rr : RI<0x03, MRMSrcReg, (outs GR64:$dst), (ins GR16orGR32orGR64:$src),
255 "lsl{q}\t{$src, $dst|$dst, $src}", []>, TB;
257 def INVLPG : I<0x01, MRM7m, (outs), (ins i8mem:$addr), "invlpg\t$addr", []>, TB;
259 def STR16r : I<0x00, MRM1r, (outs GR16:$dst), (ins),
260 "str{w}\t$dst", []>, TB, OpSize16;
261 def STR32r : I<0x00, MRM1r, (outs GR32:$dst), (ins),
262 "str{l}\t$dst", []>, TB, OpSize32;
263 def STR64r : RI<0x00, MRM1r, (outs GR64:$dst), (ins),
264 "str{q}\t$dst", []>, TB;
266 def STRm : I<0x00, MRM1m, (outs), (ins i16mem:$dst), "str{w}\t$dst", []>, TB;
268 def LTRr : I<0x00, MRM3r, (outs), (ins GR16:$src), "ltr{w}\t$src", []>, TB;
270 def LTRm : I<0x00, MRM3m, (outs), (ins i16mem:$src), "ltr{w}\t$src", []>, TB;
272 def PUSHCS16 : I<0x0E, RawFrm, (outs), (ins), "push{w}\t{%cs|cs}", []>,
273 OpSize16, Requires<[Not64BitMode]>;
274 def PUSHCS32 : I<0x0E, RawFrm, (outs), (ins), "push{l}\t{%cs|cs}", []>,
275 OpSize32, Requires<[Not64BitMode]>;
276 def PUSHSS16 : I<0x16, RawFrm, (outs), (ins), "push{w}\t{%ss|ss}", []>,
277 OpSize16, Requires<[Not64BitMode]>;
278 def PUSHSS32 : I<0x16, RawFrm, (outs), (ins), "push{l}\t{%ss|ss}", []>,
279 OpSize32, Requires<[Not64BitMode]>;
280 def PUSHDS16 : I<0x1E, RawFrm, (outs), (ins), "push{w}\t{%ds|ds}", []>,
281 OpSize16, Requires<[Not64BitMode]>;
282 def PUSHDS32 : I<0x1E, RawFrm, (outs), (ins), "push{l}\t{%ds|ds}", []>,
283 OpSize32, Requires<[Not64BitMode]>;
284 def PUSHES16 : I<0x06, RawFrm, (outs), (ins), "push{w}\t{%es|es}", []>,
285 OpSize16, Requires<[Not64BitMode]>;
286 def PUSHES32 : I<0x06, RawFrm, (outs), (ins), "push{l}\t{%es|es}", []>,
287 OpSize32, Requires<[Not64BitMode]>;
288 def PUSHFS16 : I<0xa0, RawFrm, (outs), (ins), "push{w}\t{%fs|fs}", []>,
290 def PUSHFS32 : I<0xa0, RawFrm, (outs), (ins), "push{l}\t{%fs|fs}", []>, TB,
291 OpSize32, Requires<[Not64BitMode]>;
292 def PUSHGS16 : I<0xa8, RawFrm, (outs), (ins), "push{w}\t{%gs|gs}", []>,
294 def PUSHGS32 : I<0xa8, RawFrm, (outs), (ins), "push{l}\t{%gs|gs}", []>, TB,
295 OpSize32, Requires<[Not64BitMode]>;
296 def PUSHFS64 : I<0xa0, RawFrm, (outs), (ins), "push{q}\t{%fs|fs}", []>, TB,
297 OpSize32, Requires<[In64BitMode]>;
298 def PUSHGS64 : I<0xa8, RawFrm, (outs), (ins), "push{q}\t{%gs|gs}", []>, TB,
299 OpSize32, Requires<[In64BitMode]>;
301 // No "pop cs" instruction.
302 def POPSS16 : I<0x17, RawFrm, (outs), (ins), "pop{w}\t{%ss|ss}", []>,
303 OpSize16, Requires<[Not64BitMode]>;
304 def POPSS32 : I<0x17, RawFrm, (outs), (ins), "pop{l}\t{%ss|ss}", []>,
305 OpSize32, Requires<[Not64BitMode]>;
307 def POPDS16 : I<0x1F, RawFrm, (outs), (ins), "pop{w}\t{%ds|ds}", []>,
308 OpSize16, Requires<[Not64BitMode]>;
309 def POPDS32 : I<0x1F, RawFrm, (outs), (ins), "pop{l}\t{%ds|ds}", []>,
310 OpSize32, Requires<[Not64BitMode]>;
312 def POPES16 : I<0x07, RawFrm, (outs), (ins), "pop{w}\t{%es|es}", []>,
313 OpSize16, Requires<[Not64BitMode]>;
314 def POPES32 : I<0x07, RawFrm, (outs), (ins), "pop{l}\t{%es|es}", []>,
315 OpSize32, Requires<[Not64BitMode]>;
317 def POPFS16 : I<0xa1, RawFrm, (outs), (ins), "pop{w}\t{%fs|fs}", []>,
319 def POPFS32 : I<0xa1, RawFrm, (outs), (ins), "pop{l}\t{%fs|fs}", []>, TB,
320 OpSize32, Requires<[Not64BitMode]>;
321 def POPFS64 : I<0xa1, RawFrm, (outs), (ins), "pop{q}\t{%fs|fs}", []>, TB,
322 OpSize32, Requires<[In64BitMode]>;
324 def POPGS16 : I<0xa9, RawFrm, (outs), (ins), "pop{w}\t{%gs|gs}", []>,
326 def POPGS32 : I<0xa9, RawFrm, (outs), (ins), "pop{l}\t{%gs|gs}", []>, TB,
327 OpSize32, Requires<[Not64BitMode]>;
328 def POPGS64 : I<0xa9, RawFrm, (outs), (ins), "pop{q}\t{%gs|gs}", []>, TB,
329 OpSize32, Requires<[In64BitMode]>;
331 def LDS16rm : I<0xc5, MRMSrcMem, (outs GR16:$dst), (ins opaquemem:$src),
332 "lds{w}\t{$src, $dst|$dst, $src}", []>, OpSize16,
333 Requires<[Not64BitMode]>;
334 def LDS32rm : I<0xc5, MRMSrcMem, (outs GR32:$dst), (ins opaquemem:$src),
335 "lds{l}\t{$src, $dst|$dst, $src}", []>, OpSize32,
336 Requires<[Not64BitMode]>;
338 def LSS16rm : I<0xb2, MRMSrcMem, (outs GR16:$dst), (ins opaquemem:$src),
339 "lss{w}\t{$src, $dst|$dst, $src}", []>, TB, OpSize16;
340 def LSS32rm : I<0xb2, MRMSrcMem, (outs GR32:$dst), (ins opaquemem:$src),
341 "lss{l}\t{$src, $dst|$dst, $src}", []>, TB, OpSize32;
342 def LSS64rm : RI<0xb2, MRMSrcMem, (outs GR64:$dst), (ins opaquemem:$src),
343 "lss{q}\t{$src, $dst|$dst, $src}", []>, TB;
345 def LES16rm : I<0xc4, MRMSrcMem, (outs GR16:$dst), (ins opaquemem:$src),
346 "les{w}\t{$src, $dst|$dst, $src}", []>, OpSize16,
347 Requires<[Not64BitMode]>;
348 def LES32rm : I<0xc4, MRMSrcMem, (outs GR32:$dst), (ins opaquemem:$src),
349 "les{l}\t{$src, $dst|$dst, $src}", []>, OpSize32,
350 Requires<[Not64BitMode]>;
352 def LFS16rm : I<0xb4, MRMSrcMem, (outs GR16:$dst), (ins opaquemem:$src),
353 "lfs{w}\t{$src, $dst|$dst, $src}", []>, TB, OpSize16;
354 def LFS32rm : I<0xb4, MRMSrcMem, (outs GR32:$dst), (ins opaquemem:$src),
355 "lfs{l}\t{$src, $dst|$dst, $src}", []>, TB, OpSize32;
356 def LFS64rm : RI<0xb4, MRMSrcMem, (outs GR64:$dst), (ins opaquemem:$src),
357 "lfs{q}\t{$src, $dst|$dst, $src}", []>, TB;
359 def LGS16rm : I<0xb5, MRMSrcMem, (outs GR16:$dst), (ins opaquemem:$src),
360 "lgs{w}\t{$src, $dst|$dst, $src}", []>, TB, OpSize16;
361 def LGS32rm : I<0xb5, MRMSrcMem, (outs GR32:$dst), (ins opaquemem:$src),
362 "lgs{l}\t{$src, $dst|$dst, $src}", []>, TB, OpSize32;
364 def LGS64rm : RI<0xb5, MRMSrcMem, (outs GR64:$dst), (ins opaquemem:$src),
365 "lgs{q}\t{$src, $dst|$dst, $src}", []>, TB;
367 def VERRr : I<0x00, MRM4r, (outs), (ins GR16:$seg), "verr\t$seg", []>, TB;
368 def VERWr : I<0x00, MRM5r, (outs), (ins GR16:$seg), "verw\t$seg", []>, TB;
370 def VERRm : I<0x00, MRM4m, (outs), (ins i16mem:$seg), "verr\t$seg", []>, TB;
371 def VERWm : I<0x00, MRM5m, (outs), (ins i16mem:$seg), "verw\t$seg", []>, TB;
375 //===----------------------------------------------------------------------===//
376 // Descriptor-table support instructions
378 let SchedRW = [WriteSystem] in {
379 def SGDT16m : I<0x01, MRM0m, (outs), (ins opaquemem:$dst),
380 "sgdtw\t$dst", []>, TB, OpSize16, Requires<[Not64BitMode]>;
381 def SGDT32m : I<0x01, MRM0m, (outs), (ins opaquemem:$dst),
382 "sgdt{l|d}\t$dst", []>, OpSize32, TB, Requires <[Not64BitMode]>;
383 def SGDT64m : I<0x01, MRM0m, (outs), (ins opaquemem:$dst),
384 "sgdt{q}\t$dst", []>, TB, Requires <[In64BitMode]>;
385 def SIDT16m : I<0x01, MRM1m, (outs), (ins opaquemem:$dst),
386 "sidtw\t$dst", []>, TB, OpSize16, Requires<[Not64BitMode]>;
387 def SIDT32m : I<0x01, MRM1m, (outs), (ins opaquemem:$dst),
388 "sidt{l|d}\t$dst", []>, OpSize32, TB, Requires <[Not64BitMode]>;
389 def SIDT64m : I<0x01, MRM1m, (outs), (ins opaquemem:$dst),
390 "sidt{q}\t$dst", []>, TB, Requires <[In64BitMode]>;
391 def SLDT16r : I<0x00, MRM0r, (outs GR16:$dst), (ins),
392 "sldt{w}\t$dst", []>, TB, OpSize16;
394 def SLDT16m : I<0x00, MRM0m, (outs), (ins i16mem:$dst),
395 "sldt{w}\t$dst", []>, TB;
396 def SLDT32r : I<0x00, MRM0r, (outs GR32:$dst), (ins),
397 "sldt{l}\t$dst", []>, OpSize32, TB;
399 // LLDT is not interpreted specially in 64-bit mode because there is no sign
401 def SLDT64r : RI<0x00, MRM0r, (outs GR64:$dst), (ins),
402 "sldt{q}\t$dst", []>, TB, Requires<[In64BitMode]>;
404 def LGDT16m : I<0x01, MRM2m, (outs), (ins opaquemem:$src),
405 "lgdtw\t$src", []>, TB, OpSize16, Requires<[Not64BitMode]>;
406 def LGDT32m : I<0x01, MRM2m, (outs), (ins opaquemem:$src),
407 "lgdt{l|d}\t$src", []>, OpSize32, TB, Requires<[Not64BitMode]>;
408 def LGDT64m : I<0x01, MRM2m, (outs), (ins opaquemem:$src),
409 "lgdt{q}\t$src", []>, TB, Requires<[In64BitMode]>;
410 def LIDT16m : I<0x01, MRM3m, (outs), (ins opaquemem:$src),
411 "lidtw\t$src", []>, TB, OpSize16, Requires<[Not64BitMode]>;
412 def LIDT32m : I<0x01, MRM3m, (outs), (ins opaquemem:$src),
413 "lidt{l|d}\t$src", []>, OpSize32, TB, Requires<[Not64BitMode]>;
414 def LIDT64m : I<0x01, MRM3m, (outs), (ins opaquemem:$src),
415 "lidt{q}\t$src", []>, TB, Requires<[In64BitMode]>;
416 def LLDT16r : I<0x00, MRM2r, (outs), (ins GR16:$src),
417 "lldt{w}\t$src", []>, TB;
419 def LLDT16m : I<0x00, MRM2m, (outs), (ins i16mem:$src),
420 "lldt{w}\t$src", []>, TB;
423 //===----------------------------------------------------------------------===//
424 // Specialized register support
425 let SchedRW = [WriteSystem] in {
426 let Uses = [EAX, ECX, EDX] in
427 def WRMSR : I<0x30, RawFrm, (outs), (ins), "wrmsr", []>, TB;
428 let Uses = [EAX, ECX, EDX] in
429 def WRMSRNS : I<0x01, MRM_C6, (outs), (ins), "wrmsrns", []>, TB;
430 let Defs = [EAX, EDX], Uses = [ECX] in
431 def RDMSR : I<0x32, RawFrm, (outs), (ins), "rdmsr", []>, TB;
432 let Defs = [RAX, EFLAGS], Uses = [RBX, RCX], Predicates = [In64BitMode] in
433 def PBNDKB : I<0x01, MRM_C7, (outs), (ins), "pbndkb", []>, TB;
434 let Uses = [RSI, RDI, RCX], Predicates = [In64BitMode] in {
435 def WRMSRLIST : I<0x01, MRM_C6, (outs), (ins), "wrmsrlist", []>, TB, XS;
436 def RDMSRLIST : I<0x01, MRM_C6, (outs), (ins), "rdmsrlist", []>, TB, XD;
439 let Predicates = [HasUSERMSR], mayLoad = 1 in {
440 def URDMSRrr : I<0xf8, MRMSrcReg, (outs GR64:$dst), (ins GR64:$src),
441 "urdmsr\t{$src, $dst|$dst, $src}",
442 [(set GR64:$dst, (int_x86_urdmsr GR64:$src))]>, T8, XD;
443 def URDMSRri : Ii32<0xf8, MRM0r, (outs GR64:$dst), (ins i64i32imm:$imm),
444 "urdmsr\t{$imm, $dst|$dst, $imm}",
445 [(set GR64:$dst, (int_x86_urdmsr i64immSExt32_su:$imm))]>, T_MAP7, XD, VEX;
447 let Predicates = [HasUSERMSR], mayStore = 1 in {
448 def UWRMSRrr : I<0xf8, MRMSrcReg, (outs), (ins GR64:$src1, GR64:$src2),
449 "uwrmsr\t{$src2, $src1|$src1, $src2}",
450 [(int_x86_uwrmsr GR64:$src1, GR64:$src2)]>, T8, XS;
451 def UWRMSRir : Ii32<0xf8, MRM0r, (outs), (ins GR64:$src, i64i32imm:$imm),
452 "uwrmsr\t{$src, $imm|$imm, $src}",
453 [(int_x86_uwrmsr i64immSExt32_su:$imm, GR64:$src)]>, T_MAP7, XS, VEX;
455 let Defs = [RAX, RDX], Uses = [ECX] in
456 def RDPMC : I<0x33, RawFrm, (outs), (ins), "rdpmc", []>, TB;
458 def SMSW16r : I<0x01, MRM4r, (outs GR16:$dst), (ins),
459 "smsw{w}\t$dst", []>, OpSize16, TB;
460 def SMSW32r : I<0x01, MRM4r, (outs GR32:$dst), (ins),
461 "smsw{l}\t$dst", []>, OpSize32, TB;
462 // no m form encodable; use SMSW16m
463 def SMSW64r : RI<0x01, MRM4r, (outs GR64:$dst), (ins),
464 "smsw{q}\t$dst", []>, TB;
466 // For memory operands, there is only a 16-bit form
467 def SMSW16m : I<0x01, MRM4m, (outs), (ins i16mem:$dst),
468 "smsw{w}\t$dst", []>, TB;
470 def LMSW16r : I<0x01, MRM6r, (outs), (ins GR16:$src),
471 "lmsw{w}\t$src", []>, TB;
473 def LMSW16m : I<0x01, MRM6m, (outs), (ins i16mem:$src),
474 "lmsw{w}\t$src", []>, TB;
476 let Defs = [EAX, EBX, ECX, EDX], Uses = [EAX, ECX] in
477 def CPUID : I<0xA2, RawFrm, (outs), (ins), "cpuid", []>, TB;
480 //===----------------------------------------------------------------------===//
481 // Cache instructions
482 let SchedRW = [WriteSystem] in {
483 def INVD : I<0x08, RawFrm, (outs), (ins), "invd", []>, TB;
484 def WBINVD : I<0x09, RawFrm, (outs), (ins), "wbinvd", [(int_x86_wbinvd)]>, TB, PS;
486 // wbnoinvd is like wbinvd, except without invalidation
487 // encoding: like wbinvd + an 0xF3 prefix
488 def WBNOINVD : I<0x09, RawFrm, (outs), (ins), "wbnoinvd",
489 [(int_x86_wbnoinvd)]>, TB, XS,
490 Requires<[HasWBNOINVD]>;
493 //===----------------------------------------------------------------------===//
495 // Use with caution, availability is not predicated on features.
496 let SchedRW = [WriteSystem] in {
497 let Uses = [SSP] in {
498 let Defs = [SSP] in {
499 def INCSSPD : I<0xAE, MRM5r, (outs), (ins GR32:$src), "incsspd\t$src",
500 [(int_x86_incsspd GR32:$src)]>, TB, XS;
501 def INCSSPQ : RI<0xAE, MRM5r, (outs), (ins GR64:$src), "incsspq\t$src",
502 [(int_x86_incsspq GR64:$src)]>, TB, XS;
505 let Constraints = "$src = $dst" in {
506 def RDSSPD : I<0x1E, MRM1r, (outs GR32:$dst), (ins GR32:$src),
508 [(set GR32:$dst, (int_x86_rdsspd GR32:$src))]>, TB, XS;
509 def RDSSPQ : RI<0x1E, MRM1r, (outs GR64:$dst), (ins GR64:$src),
511 [(set GR64:$dst, (int_x86_rdsspq GR64:$src))]>, TB, XS;
514 let Defs = [SSP] in {
515 def SAVEPREVSSP : I<0x01, MRM_EA, (outs), (ins), "saveprevssp",
516 [(int_x86_saveprevssp)]>, TB, XS;
517 def RSTORSSP : I<0x01, MRM5m, (outs), (ins i32mem:$src),
519 [(int_x86_rstorssp addr:$src)]>, TB, XS;
523 let Predicates = [NoEGPR] in {
524 def WRSSD : I<0xF6, MRMDestMem, (outs), (ins i32mem:$dst, GR32:$src),
525 "wrssd\t{$src, $dst|$dst, $src}",
526 [(int_x86_wrssd GR32:$src, addr:$dst)]>, T8;
527 def WRSSQ : RI<0xF6, MRMDestMem, (outs), (ins i64mem:$dst, GR64:$src),
528 "wrssq\t{$src, $dst|$dst, $src}",
529 [(int_x86_wrssq GR64:$src, addr:$dst)]>, T8;
530 def WRUSSD : I<0xF5, MRMDestMem, (outs), (ins i32mem:$dst, GR32:$src),
531 "wrussd\t{$src, $dst|$dst, $src}",
532 [(int_x86_wrussd GR32:$src, addr:$dst)]>, T8, PD;
533 def WRUSSQ : RI<0xF5, MRMDestMem, (outs), (ins i64mem:$dst, GR64:$src),
534 "wrussq\t{$src, $dst|$dst, $src}",
535 [(int_x86_wrussq GR64:$src, addr:$dst)]>, T8, PD;
538 let Predicates = [HasEGPR, In64BitMode] in {
539 def WRSSD_EVEX : I<0x66, MRMDestMem, (outs), (ins i32mem:$dst, GR32:$src),
540 "wrssd\t{$src, $dst|$dst, $src}",
541 [(int_x86_wrssd GR32:$src, addr:$dst)]>, EVEX, NoCD8, T_MAP4;
542 def WRSSQ_EVEX : RI<0x66, MRMDestMem, (outs), (ins i64mem:$dst, GR64:$src),
543 "wrssq\t{$src, $dst|$dst, $src}",
544 [(int_x86_wrssq GR64:$src, addr:$dst)]>, EVEX, NoCD8, T_MAP4;
545 def WRUSSD_EVEX : I<0x65, MRMDestMem, (outs), (ins i32mem:$dst, GR32:$src),
546 "wrussd\t{$src, $dst|$dst, $src}",
547 [(int_x86_wrussd GR32:$src, addr:$dst)]>, EVEX, NoCD8, T_MAP4, PD;
548 def WRUSSQ_EVEX : RI<0x65, MRMDestMem, (outs), (ins i64mem:$dst, GR64:$src),
549 "wrussq\t{$src, $dst|$dst, $src}",
550 [(int_x86_wrussq GR64:$src, addr:$dst)]>, EVEX, NoCD8, T_MAP4, PD;
553 let Defs = [SSP] in {
554 let Uses = [SSP] in {
555 def SETSSBSY : I<0x01, MRM_E8, (outs), (ins), "setssbsy",
556 [(int_x86_setssbsy)]>, TB, XS;
559 def CLRSSBSY : I<0xAE, MRM6m, (outs), (ins i32mem:$src),
561 [(int_x86_clrssbsy addr:$src)]>, TB, XS;
565 let SchedRW = [WriteSystem] in {
566 def ENDBR64 : I<0x1E, MRM_FA, (outs), (ins), "endbr64", []>, TB, XS;
567 def ENDBR32 : I<0x1E, MRM_FB, (outs), (ins), "endbr32", []>, TB, XS;
570 //===----------------------------------------------------------------------===//
571 // XSAVE instructions
572 let SchedRW = [WriteSystem] in {
573 // NOTE: No HasXSAVE predicate so that these can be used with _xgetbv/_xsetbv
574 // on Windows without needing to enable the xsave feature to be compatible with
576 let Defs = [EDX, EAX], Uses = [ECX] in
577 def XGETBV : I<0x01, MRM_D0, (outs), (ins), "xgetbv", []>, TB;
579 let Uses = [EDX, EAX, ECX] in
580 def XSETBV : I<0x01, MRM_D1, (outs), (ins),
582 [(int_x86_xsetbv ECX, EDX, EAX)]>, TB;
585 let Uses = [EDX, EAX] in {
586 def XSAVE : I<0xAE, MRM4m, (outs), (ins opaquemem:$dst),
588 [(int_x86_xsave addr:$dst, EDX, EAX)]>, TB, Requires<[HasXSAVE]>;
589 def XSAVE64 : RI<0xAE, MRM4m, (outs), (ins opaquemem:$dst),
591 [(int_x86_xsave64 addr:$dst, EDX, EAX)]>, TB, Requires<[HasXSAVE, In64BitMode]>;
592 def XRSTOR : I<0xAE, MRM5m, (outs), (ins opaquemem:$dst),
594 [(int_x86_xrstor addr:$dst, EDX, EAX)]>, TB, Requires<[HasXSAVE]>;
595 def XRSTOR64 : RI<0xAE, MRM5m, (outs), (ins opaquemem:$dst),
597 [(int_x86_xrstor64 addr:$dst, EDX, EAX)]>, TB, Requires<[HasXSAVE, In64BitMode]>;
598 def XSAVEOPT : I<0xAE, MRM6m, (outs), (ins opaquemem:$dst),
600 [(int_x86_xsaveopt addr:$dst, EDX, EAX)]>, TB, Requires<[HasXSAVEOPT]>;
601 def XSAVEOPT64 : RI<0xAE, MRM6m, (outs), (ins opaquemem:$dst),
603 [(int_x86_xsaveopt64 addr:$dst, EDX, EAX)]>, TB, Requires<[HasXSAVEOPT, In64BitMode]>;
604 def XSAVEC : I<0xC7, MRM4m, (outs), (ins opaquemem:$dst),
606 [(int_x86_xsavec addr:$dst, EDX, EAX)]>, TB, Requires<[HasXSAVEC]>;
607 def XSAVEC64 : RI<0xC7, MRM4m, (outs), (ins opaquemem:$dst),
609 [(int_x86_xsavec64 addr:$dst, EDX, EAX)]>, TB, Requires<[HasXSAVEC, In64BitMode]>;
610 def XSAVES : I<0xC7, MRM5m, (outs), (ins opaquemem:$dst),
612 [(int_x86_xsaves addr:$dst, EDX, EAX)]>, TB, Requires<[HasXSAVES]>;
613 def XSAVES64 : RI<0xC7, MRM5m, (outs), (ins opaquemem:$dst),
615 [(int_x86_xsaves64 addr:$dst, EDX, EAX)]>, TB, Requires<[HasXSAVE, In64BitMode]>;
616 def XRSTORS : I<0xC7, MRM3m, (outs), (ins opaquemem:$dst),
618 [(int_x86_xrstors addr:$dst, EDX, EAX)]>, TB, Requires<[HasXSAVES]>;
619 def XRSTORS64 : RI<0xC7, MRM3m, (outs), (ins opaquemem:$dst),
621 [(int_x86_xrstors64 addr:$dst, EDX, EAX)]>, TB, Requires<[HasXSAVES, In64BitMode]>;
625 //===----------------------------------------------------------------------===//
626 // VIA PadLock crypto instructions
627 let Defs = [RAX, RDI], Uses = [RDX, RDI], SchedRW = [WriteSystem] in
628 def XSTORE : I<0xa7, MRM_C0, (outs), (ins), "xstore", []>, TB;
630 def : InstAlias<"xstorerng", (XSTORE)>;
632 let SchedRW = [WriteSystem] in {
633 let Defs = [RSI, RDI], Uses = [RBX, RDX, RSI, RDI] in {
634 def XCRYPTECB : I<0xa7, MRM_C8, (outs), (ins), "xcryptecb", []>, TB, REP;
635 def XCRYPTCBC : I<0xa7, MRM_D0, (outs), (ins), "xcryptcbc", []>, TB, REP;
636 def XCRYPTCTR : I<0xa7, MRM_D8, (outs), (ins), "xcryptctr", []>, TB, REP;
637 def XCRYPTCFB : I<0xa7, MRM_E0, (outs), (ins), "xcryptcfb", []>, TB, REP;
638 def XCRYPTOFB : I<0xa7, MRM_E8, (outs), (ins), "xcryptofb", []>, TB, REP;
641 let Defs = [RAX, RSI, RDI], Uses = [RAX, RSI, RDI] in {
642 def XSHA1 : I<0xa6, MRM_C8, (outs), (ins), "xsha1", []>, TB, REP;
643 def XSHA256 : I<0xa6, MRM_D0, (outs), (ins), "xsha256", []>, TB, REP;
645 let Defs = [RAX, RDX, RSI], Uses = [RAX, RSI] in
646 def MONTMUL : I<0xa6, MRM_C0, (outs), (ins), "montmul", []>, TB, REP;
649 //==-----------------------------------------------------------------------===//
650 // PKU - enable protection key
651 let SchedRW = [WriteSystem] in {
652 let Defs = [EAX, EDX], Uses = [ECX] in
653 def RDPKRUr : I<0x01, MRM_EE, (outs), (ins), "rdpkru",
654 [(set EAX, (X86rdpkru ECX)), (implicit EDX)]>, TB;
655 let Uses = [EAX, ECX, EDX] in
656 def WRPKRUr : I<0x01, MRM_EF, (outs), (ins), "wrpkru",
657 [(X86wrpkru EAX, EDX, ECX)]>, TB;
660 //===----------------------------------------------------------------------===//
661 // FS/GS Base Instructions
662 let Predicates = [HasFSGSBase, In64BitMode], SchedRW = [WriteSystem] in {
663 def RDFSBASE : I<0xAE, MRM0r, (outs GR32:$dst), (ins),
665 [(set GR32:$dst, (int_x86_rdfsbase_32))]>, TB, XS;
666 def RDFSBASE64 : RI<0xAE, MRM0r, (outs GR64:$dst), (ins),
668 [(set GR64:$dst, (int_x86_rdfsbase_64))]>, TB, XS;
669 def RDGSBASE : I<0xAE, MRM1r, (outs GR32:$dst), (ins),
671 [(set GR32:$dst, (int_x86_rdgsbase_32))]>, TB, XS;
672 def RDGSBASE64 : RI<0xAE, MRM1r, (outs GR64:$dst), (ins),
674 [(set GR64:$dst, (int_x86_rdgsbase_64))]>, TB, XS;
675 def WRFSBASE : I<0xAE, MRM2r, (outs), (ins GR32:$src),
677 [(int_x86_wrfsbase_32 GR32:$src)]>, TB, XS;
678 def WRFSBASE64 : RI<0xAE, MRM2r, (outs), (ins GR64:$src),
680 [(int_x86_wrfsbase_64 GR64:$src)]>, TB, XS;
681 def WRGSBASE : I<0xAE, MRM3r, (outs), (ins GR32:$src),
683 [(int_x86_wrgsbase_32 GR32:$src)]>, TB, XS;
684 def WRGSBASE64 : RI<0xAE, MRM3r, (outs), (ins GR64:$src),
686 [(int_x86_wrgsbase_64 GR64:$src)]>, TB, XS;
689 //===----------------------------------------------------------------------===//
690 // INVPCID Instruction
691 let SchedRW = [WriteSystem] in {
692 def INVPCID32 : I<0x82, MRMSrcMem, (outs), (ins GR32:$src1, i128mem:$src2),
693 "invpcid\t{$src2, $src1|$src1, $src2}",
694 [(int_x86_invpcid GR32:$src1, addr:$src2)]>, T8, PD,
695 Requires<[Not64BitMode, HasINVPCID]>;
696 def INVPCID64 : I<0x82, MRMSrcMem, (outs), (ins GR64:$src1, i128mem:$src2),
697 "invpcid\t{$src2, $src1|$src1, $src2}", []>, T8, PD,
698 Requires<[In64BitMode]>;
700 def INVPCID64_EVEX : I<0xF2, MRMSrcMem, (outs), (ins GR64:$src1, i128mem:$src2),
701 "invpcid\t{$src2, $src1|$src1, $src2}", []>,
702 EVEX, NoCD8, T_MAP4, XS, Requires<[In64BitMode]>;
705 let Predicates = [HasINVPCID, NoEGPR] in {
706 // The instruction can only use a 64 bit register as the register argument
707 // in 64 bit mode, while the intrinsic only accepts a 32 bit argument
708 // corresponding to it.
709 // The accepted values for now are 0,1,2,3 anyways (see Intel SDM -- INVCPID
710 // type),/ so it doesn't hurt us that one can't supply a 64 bit value here.
711 def : Pat<(int_x86_invpcid GR32:$src1, addr:$src2),
713 (SUBREG_TO_REG (i64 0), (MOV32rr GR32:$src1), sub_32bit),
717 let Predicates = [HasINVPCID, HasEGPR] in {
718 def : Pat<(int_x86_invpcid GR32:$src1, addr:$src2),
720 (SUBREG_TO_REG (i64 0), (MOV32rr GR32:$src1), sub_32bit),
725 //===----------------------------------------------------------------------===//
727 let Defs = [EFLAGS], SchedRW = [WriteSystem] in {
728 def CLAC : I<0x01, MRM_CA, (outs), (ins), "clac", []>, TB;
729 def STAC : I<0x01, MRM_CB, (outs), (ins), "stac", []>, TB;
732 //===----------------------------------------------------------------------===//
734 let SchedRW = [WriteSystem] in {
735 let Uses = [RAX, RBX, RCX, RDX], Defs = [RAX, RBX, RCX] in {
736 def GETSEC : I<0x37, RawFrm, (outs), (ins), "getsec", []>, TB;
740 //===----------------------------------------------------------------------===//
741 // TS flag control instruction.
742 let SchedRW = [WriteSystem] in {
743 def CLTS : I<0x06, RawFrm, (outs), (ins), "clts", []>, TB;
746 //===----------------------------------------------------------------------===//
747 // IF (inside EFLAGS) management instructions.
748 let SchedRW = [WriteSystem], Uses = [EFLAGS], Defs = [EFLAGS] in {
749 def CLI : I<0xFA, RawFrm, (outs), (ins), "cli", []>;
750 def STI : I<0xFB, RawFrm, (outs), (ins), "sti", []>;
753 //===----------------------------------------------------------------------===//
755 let SchedRW = [WriteSystem] in {
756 def RDPID32 : I<0xC7, MRM7r, (outs GR32:$dst), (ins),
757 "rdpid\t$dst", [(set GR32:$dst, (int_x86_rdpid))]>, TB, XS,
758 Requires<[Not64BitMode, HasRDPID]>;
759 def RDPID64 : I<0xC7, MRM7r, (outs GR64:$dst), (ins), "rdpid\t$dst", []>, TB, XS,
760 Requires<[In64BitMode, HasRDPID]>;
763 let Predicates = [In64BitMode, HasRDPID] in {
764 // Due to silly instruction definition, we have to compensate for the
765 // instruction outputing a 64-bit register.
766 def : Pat<(int_x86_rdpid),
767 (EXTRACT_SUBREG (RDPID64), sub_32bit)>;
771 //===----------------------------------------------------------------------===//
772 // PTWRITE Instruction - Write Data to a Processor Trace Packet
773 let SchedRW = [WriteSystem] in {
774 def PTWRITEm: I<0xAE, MRM4m, (outs), (ins i32mem:$dst),
775 "ptwrite{l}\t$dst", [(int_x86_ptwrite32 (loadi32 addr:$dst))]>, TB, XS,
776 Requires<[HasPTWRITE]>;
777 def PTWRITE64m : RI<0xAE, MRM4m, (outs), (ins i64mem:$dst),
778 "ptwrite{q}\t$dst", [(int_x86_ptwrite64 (loadi64 addr:$dst))]>, TB, XS,
779 Requires<[In64BitMode, HasPTWRITE]>;
781 def PTWRITEr : I<0xAE, MRM4r, (outs), (ins GR32:$dst),
782 "ptwrite{l}\t$dst", [(int_x86_ptwrite32 GR32:$dst)]>, TB, XS,
783 Requires<[HasPTWRITE]>;
784 def PTWRITE64r : RI<0xAE, MRM4r, (outs), (ins GR64:$dst),
785 "ptwrite{q}\t$dst", [(int_x86_ptwrite64 GR64:$dst)]>, TB, XS,
786 Requires<[In64BitMode, HasPTWRITE]>;
789 //===----------------------------------------------------------------------===//
790 // RDPRU - Read Processor Register instruction.
792 let SchedRW = [WriteSystem] in {
793 let Uses = [ECX], Defs = [EAX, EDX] in
794 def RDPRU : I<0x01, MRM_FD, (outs), (ins), "rdpru", []>, TB,
795 Requires<[HasRDPRU]>;
798 //===----------------------------------------------------------------------===//
799 // Platform Configuration instruction
802 // "This instruction is used to execute functions for configuring platform
804 // EAX: Leaf function to be invoked.
805 // RBX/RCX/RDX: Leaf-specific purpose."
806 // "Successful execution of the leaf clears RAX (set to zero) and ZF, CF, PF,
807 // AF, OF, and SF are cleared. In case of failure, the failure reason is
808 // indicated in RAX with ZF set to 1 and CF, PF, AF, OF, and SF are cleared."
809 // Thus all these mentioned registers are considered clobbered.
811 let SchedRW = [WriteSystem] in {
812 let Uses = [RAX, RBX, RCX, RDX], Defs = [RAX, RBX, RCX, RDX, EFLAGS] in
813 def PCONFIG : I<0x01, MRM_C5, (outs), (ins), "pconfig", []>, TB,
814 Requires<[HasPCONFIG]>;