1 //===- X86InstrFormats.td - X86 Instruction Formats --------*- tablegen -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 //===----------------------------------------------------------------------===//
11 // X86 Instruction Format Definitions.
14 // Format specifies the encoding used by the instruction. This is part of the
15 // ad-hoc solution used to emit machine instruction encodings by our machine
17 class Format<bits<6> val> {
21 def Pseudo : Format<0>; def RawFrm : Format<1>;
22 def AddRegFrm : Format<2>; def MRMDestReg : Format<3>;
23 def MRMDestMem : Format<4>; def MRMSrcReg : Format<5>;
24 def MRMSrcMem : Format<6>;
25 def MRM0r : Format<16>; def MRM1r : Format<17>; def MRM2r : Format<18>;
26 def MRM3r : Format<19>; def MRM4r : Format<20>; def MRM5r : Format<21>;
27 def MRM6r : Format<22>; def MRM7r : Format<23>;
28 def MRM0m : Format<24>; def MRM1m : Format<25>; def MRM2m : Format<26>;
29 def MRM3m : Format<27>; def MRM4m : Format<28>; def MRM5m : Format<29>;
30 def MRM6m : Format<30>; def MRM7m : Format<31>;
31 def MRMInitReg : Format<32>;
32 def MRM_C1 : Format<33>;
33 def MRM_C2 : Format<34>;
34 def MRM_C3 : Format<35>;
35 def MRM_C4 : Format<36>;
36 def MRM_C8 : Format<37>;
37 def MRM_C9 : Format<38>;
38 def MRM_E8 : Format<39>;
39 def MRM_F0 : Format<40>;
40 def MRM_F8 : Format<41>;
41 def MRM_F9 : Format<42>;
43 // ImmType - This specifies the immediate type used by an instruction. This is
44 // part of the ad-hoc solution used to emit machine instruction encodings by our
45 // machine code emitter.
46 class ImmType<bits<3> val> {
49 def NoImm : ImmType<0>;
50 def Imm8 : ImmType<1>;
51 def Imm8PCRel : ImmType<2>;
52 def Imm16 : ImmType<3>;
53 def Imm32 : ImmType<4>;
54 def Imm32PCRel : ImmType<5>;
55 def Imm64 : ImmType<6>;
57 // FPFormat - This specifies what form this FP instruction has. This is used by
58 // the Floating-Point stackifier pass.
59 class FPFormat<bits<3> val> {
62 def NotFP : FPFormat<0>;
63 def ZeroArgFP : FPFormat<1>;
64 def OneArgFP : FPFormat<2>;
65 def OneArgFPRW : FPFormat<3>;
66 def TwoArgFP : FPFormat<4>;
67 def CompareFP : FPFormat<5>;
68 def CondMovFP : FPFormat<6>;
69 def SpecialFP : FPFormat<7>;
71 // Class specifying the SSE execution domain, used by the SSEDomainFix pass.
72 // Keep in sync with tables in X86InstrInfo.cpp.
73 class Domain<bits<2> val> {
76 def GenericDomain : Domain<0>;
77 def SSEPackedSingle : Domain<1>;
78 def SSEPackedDouble : Domain<2>;
79 def SSEPackedInt : Domain<3>;
81 // Prefix byte classes which are used to indicate to the ad-hoc machine code
82 // emitter that various prefix bytes are required.
83 class OpSize { bit hasOpSizePrefix = 1; }
84 class AdSize { bit hasAdSizePrefix = 1; }
85 class REX_W { bit hasREX_WPrefix = 1; }
86 class VEX_4V { bit hasVEX_4VPrefix = 1; }
87 class LOCK { bit hasLockPrefix = 1; }
88 class SegFS { bits<2> SegOvrBits = 1; }
89 class SegGS { bits<2> SegOvrBits = 2; }
90 class TB { bits<4> Prefix = 1; }
91 class REP { bits<4> Prefix = 2; }
92 class D8 { bits<4> Prefix = 3; }
93 class D9 { bits<4> Prefix = 4; }
94 class DA { bits<4> Prefix = 5; }
95 class DB { bits<4> Prefix = 6; }
96 class DC { bits<4> Prefix = 7; }
97 class DD { bits<4> Prefix = 8; }
98 class DE { bits<4> Prefix = 9; }
99 class DF { bits<4> Prefix = 10; }
100 class XD { bits<4> Prefix = 11; }
101 class XS { bits<4> Prefix = 12; }
102 class T8 { bits<4> Prefix = 13; }
103 class TA { bits<4> Prefix = 14; }
104 class TF { bits<4> Prefix = 15; }
106 class X86Inst<bits<8> opcod, Format f, ImmType i, dag outs, dag ins,
107 string AsmStr, Domain d = GenericDomain>
109 let Namespace = "X86";
111 bits<8> Opcode = opcod;
113 bits<6> FormBits = Form.Value;
116 dag OutOperandList = outs;
117 dag InOperandList = ins;
118 string AsmString = AsmStr;
121 // Attributes specific to X86 instructions...
123 bit hasOpSizePrefix = 0; // Does this inst have a 0x66 prefix?
124 bit hasAdSizePrefix = 0; // Does this inst have a 0x67 prefix?
126 bits<4> Prefix = 0; // Which prefix byte does this inst have?
127 bit hasREX_WPrefix = 0; // Does this inst requires the REX.W prefix?
128 bit hasVEX_4VPrefix = 0; // Does this inst requires the VEX.VVVV prefix?
129 FPFormat FPForm = NotFP; // What flavor of FP instruction is this?
130 bit hasLockPrefix = 0; // Does this inst have a 0xF0 prefix?
131 bits<2> SegOvrBits = 0; // Segment override prefix.
132 Domain ExeDomain = d;
134 // TSFlags layout should be kept in sync with X86InstrInfo.h.
135 let TSFlags{5-0} = FormBits;
136 let TSFlags{6} = hasOpSizePrefix;
137 let TSFlags{7} = hasAdSizePrefix;
138 let TSFlags{11-8} = Prefix;
139 let TSFlags{12} = hasREX_WPrefix;
140 let TSFlags{15-13} = ImmT.Value;
141 let TSFlags{18-16} = FPForm.Value;
142 let TSFlags{19} = hasLockPrefix;
143 let TSFlags{21-20} = SegOvrBits;
144 let TSFlags{23-22} = ExeDomain.Value;
145 let TSFlags{31-24} = Opcode;
146 let TSFlags{32} = hasVEX_4VPrefix;
149 class I<bits<8> o, Format f, dag outs, dag ins, string asm,
150 list<dag> pattern, Domain d = GenericDomain>
151 : X86Inst<o, f, NoImm, outs, ins, asm, d> {
152 let Pattern = pattern;
155 class Ii8 <bits<8> o, Format f, dag outs, dag ins, string asm,
156 list<dag> pattern, Domain d = GenericDomain>
157 : X86Inst<o, f, Imm8, outs, ins, asm, d> {
158 let Pattern = pattern;
161 class Ii8PCRel<bits<8> o, Format f, dag outs, dag ins, string asm,
163 : X86Inst<o, f, Imm8PCRel, outs, ins, asm> {
164 let Pattern = pattern;
167 class Ii16<bits<8> o, Format f, dag outs, dag ins, string asm,
169 : X86Inst<o, f, Imm16, outs, ins, asm> {
170 let Pattern = pattern;
173 class Ii32<bits<8> o, Format f, dag outs, dag ins, string asm,
175 : X86Inst<o, f, Imm32, outs, ins, asm> {
176 let Pattern = pattern;
180 class Ii32PCRel<bits<8> o, Format f, dag outs, dag ins, string asm,
182 : X86Inst<o, f, Imm32PCRel, outs, ins, asm> {
183 let Pattern = pattern;
187 // FPStack Instruction Templates:
188 // FPI - Floating Point Instruction template.
189 class FPI<bits<8> o, Format F, dag outs, dag ins, string asm>
190 : I<o, F, outs, ins, asm, []> {}
192 // FpI_ - Floating Point Psuedo Instruction template. Not Predicated.
193 class FpI_<dag outs, dag ins, FPFormat fp, list<dag> pattern>
194 : X86Inst<0, Pseudo, NoImm, outs, ins, ""> {
196 let Pattern = pattern;
199 // Templates for instructions that use a 16- or 32-bit segmented address as
200 // their only operand: lcall (FAR CALL) and ljmp (FAR JMP)
202 // Iseg16 - 16-bit segment selector, 16-bit offset
203 // Iseg32 - 16-bit segment selector, 32-bit offset
205 class Iseg16 <bits<8> o, Format f, dag outs, dag ins, string asm,
206 list<dag> pattern> : X86Inst<o, f, NoImm, outs, ins, asm> {
207 let Pattern = pattern;
211 class Iseg32 <bits<8> o, Format f, dag outs, dag ins, string asm,
212 list<dag> pattern> : X86Inst<o, f, NoImm, outs, ins, asm> {
213 let Pattern = pattern;
217 // SI - SSE 1 & 2 scalar instructions
218 class SI<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
219 : I<o, F, outs, ins, asm, pattern> {
220 let Predicates = !if(hasVEX_4VPrefix /* VEX_4V */,
221 !if(!eq(Prefix, 11 /* XD */), [HasAVX, HasSSE2], [HasAVX, HasSSE1]),
222 !if(!eq(Prefix, 12 /* XS */), [HasSSE1], [HasSSE2]));
224 // AVX instructions have a 'v' prefix in the mnemonic
225 let AsmString = !if(hasVEX_4VPrefix, !strconcat("v", asm), asm);
228 // PI - SSE 1 & 2 packed instructions
229 class PI<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern,
231 : I<o, F, outs, ins, asm, pattern, d> {
232 let Predicates = !if(hasVEX_4VPrefix /* VEX_4V */,
233 !if(hasOpSizePrefix /* OpSize */, [HasAVX, HasSSE2], [HasAVX, HasSSE1]),
234 !if(hasOpSizePrefix /* OpSize */, [HasSSE2], [HasSSE1]));
236 // AVX instructions have a 'v' prefix in the mnemonic
237 let AsmString = !if(hasVEX_4VPrefix, !strconcat("v", asm), asm);
240 // SSE1 Instruction Templates:
242 // SSI - SSE1 instructions with XS prefix.
243 // PSI - SSE1 instructions with TB prefix.
244 // PSIi8 - SSE1 instructions with ImmT == Imm8 and TB prefix.
245 // VSSI - SSE1 instructions with XS prefix in AVX form.
246 // VPSI - SSE1 instructions with TB prefix in AVX form.
248 class SSI<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
249 : I<o, F, outs, ins, asm, pattern>, XS, Requires<[HasSSE1]>;
250 class SSIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
252 : Ii8<o, F, outs, ins, asm, pattern>, XS, Requires<[HasSSE1]>;
253 class PSI<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
254 : I<o, F, outs, ins, asm, pattern, SSEPackedSingle>, TB,
256 class PSIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
258 : Ii8<o, F, outs, ins, asm, pattern, SSEPackedSingle>, TB,
260 class VSSI<bits<8> o, Format F, dag outs, dag ins, string asm,
262 : I<o, F, outs, ins, !strconcat("v", asm), pattern>, XS, VEX_4V,
263 Requires<[HasAVX, HasSSE1]>;
264 class VPSI<bits<8> o, Format F, dag outs, dag ins, string asm,
266 : I<o, F, outs, ins, !strconcat("v", asm), pattern, SSEPackedSingle>,
267 VEX_4V, Requires<[HasAVX, HasSSE1]>;
269 // SSE2 Instruction Templates:
271 // SDI - SSE2 instructions with XD prefix.
272 // SDIi8 - SSE2 instructions with ImmT == Imm8 and XD prefix.
273 // SSDIi8 - SSE2 instructions with ImmT == Imm8 and XS prefix.
274 // PDI - SSE2 instructions with TB and OpSize prefixes.
275 // PDIi8 - SSE2 instructions with ImmT == Imm8 and TB and OpSize prefixes.
276 // VSDI - SSE2 instructions with XD prefix in AVX form.
277 // VPDI - SSE2 instructions with TB and OpSize prefixes in AVX form.
279 class SDI<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
280 : I<o, F, outs, ins, asm, pattern>, XD, Requires<[HasSSE2]>;
281 class SDIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
283 : Ii8<o, F, outs, ins, asm, pattern>, XD, Requires<[HasSSE2]>;
284 class SSDIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
286 : Ii8<o, F, outs, ins, asm, pattern>, XS, Requires<[HasSSE2]>;
287 class PDI<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
288 : I<o, F, outs, ins, asm, pattern, SSEPackedDouble>, TB, OpSize,
290 class PDIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
292 : Ii8<o, F, outs, ins, asm, pattern, SSEPackedDouble>, TB, OpSize,
294 class VSDI<bits<8> o, Format F, dag outs, dag ins, string asm,
296 : I<o, F, outs, ins, !strconcat("v", asm), pattern>, XD, VEX_4V,
297 Requires<[HasAVX, HasSSE2]>;
298 class VPDI<bits<8> o, Format F, dag outs, dag ins, string asm,
300 : I<o, F, outs, ins, !strconcat("v", asm), pattern, SSEPackedDouble>,
301 VEX_4V, OpSize, Requires<[HasAVX, HasSSE2]>;
303 // SSE3 Instruction Templates:
305 // S3I - SSE3 instructions with TB and OpSize prefixes.
306 // S3SI - SSE3 instructions with XS prefix.
307 // S3DI - SSE3 instructions with XD prefix.
309 class S3SI<bits<8> o, Format F, dag outs, dag ins, string asm,
311 : I<o, F, outs, ins, asm, pattern, SSEPackedSingle>, XS,
313 class S3DI<bits<8> o, Format F, dag outs, dag ins, string asm,
315 : I<o, F, outs, ins, asm, pattern, SSEPackedDouble>, XD,
317 class S3I<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
318 : I<o, F, outs, ins, asm, pattern, SSEPackedDouble>, TB, OpSize,
322 // SSSE3 Instruction Templates:
324 // SS38I - SSSE3 instructions with T8 prefix.
325 // SS3AI - SSSE3 instructions with TA prefix.
327 // Note: SSSE3 instructions have 64-bit and 128-bit versions. The 64-bit version
328 // uses the MMX registers. We put those instructions here because they better
329 // fit into the SSSE3 instruction category rather than the MMX category.
331 class SS38I<bits<8> o, Format F, dag outs, dag ins, string asm,
333 : Ii8<o, F, outs, ins, asm, pattern, SSEPackedInt>, T8,
334 Requires<[HasSSSE3]>;
335 class SS3AI<bits<8> o, Format F, dag outs, dag ins, string asm,
337 : Ii8<o, F, outs, ins, asm, pattern, SSEPackedInt>, TA,
338 Requires<[HasSSSE3]>;
340 // SSE4.1 Instruction Templates:
342 // SS48I - SSE 4.1 instructions with T8 prefix.
343 // SS41AIi8 - SSE 4.1 instructions with TA prefix and ImmT == Imm8.
345 class SS48I<bits<8> o, Format F, dag outs, dag ins, string asm,
347 : I<o, F, outs, ins, asm, pattern, SSEPackedInt>, T8,
348 Requires<[HasSSE41]>;
349 class SS4AIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
351 : Ii8<o, F, outs, ins, asm, pattern, SSEPackedInt>, TA,
352 Requires<[HasSSE41]>;
354 // SSE4.2 Instruction Templates:
356 // SS428I - SSE 4.2 instructions with T8 prefix.
357 class SS428I<bits<8> o, Format F, dag outs, dag ins, string asm,
359 : I<o, F, outs, ins, asm, pattern, SSEPackedInt>, T8,
360 Requires<[HasSSE42]>;
362 // SS42FI - SSE 4.2 instructions with TF prefix.
363 class SS42FI<bits<8> o, Format F, dag outs, dag ins, string asm,
365 : I<o, F, outs, ins, asm, pattern>, TF, Requires<[HasSSE42]>;
367 // SS42AI = SSE 4.2 instructions with TA prefix
368 class SS42AI<bits<8> o, Format F, dag outs, dag ins, string asm,
370 : Ii8<o, F, outs, ins, asm, pattern, SSEPackedInt>, TA,
371 Requires<[HasSSE42]>;
373 // AES Instruction Templates:
376 // These use the same encoding as the SSE4.2 T8 and TA encodings.
377 class AES8I<bits<8> o, Format F, dag outs, dag ins, string asm,
379 : I<o, F, outs, ins, asm, pattern, SSEPackedInt>, T8,
382 class AESAI<bits<8> o, Format F, dag outs, dag ins, string asm,
384 : Ii8<o, F, outs, ins, asm, pattern, SSEPackedInt>, TA,
387 // X86-64 Instruction templates...
390 class RI<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
391 : I<o, F, outs, ins, asm, pattern>, REX_W;
392 class RIi8 <bits<8> o, Format F, dag outs, dag ins, string asm,
394 : Ii8<o, F, outs, ins, asm, pattern>, REX_W;
395 class RIi32 <bits<8> o, Format F, dag outs, dag ins, string asm,
397 : Ii32<o, F, outs, ins, asm, pattern>, REX_W;
399 class RIi64<bits<8> o, Format f, dag outs, dag ins, string asm,
401 : X86Inst<o, f, Imm64, outs, ins, asm>, REX_W {
402 let Pattern = pattern;
406 class RSSI<bits<8> o, Format F, dag outs, dag ins, string asm,
408 : SSI<o, F, outs, ins, asm, pattern>, REX_W;
409 class RSDI<bits<8> o, Format F, dag outs, dag ins, string asm,
411 : SDI<o, F, outs, ins, asm, pattern>, REX_W;
412 class RPDI<bits<8> o, Format F, dag outs, dag ins, string asm,
414 : PDI<o, F, outs, ins, asm, pattern>, REX_W;
416 // MMX Instruction templates
419 // MMXI - MMX instructions with TB prefix.
420 // MMXI64 - MMX instructions with TB prefix valid only in 64 bit mode.
421 // MMX2I - MMX / SSE2 instructions with TB and OpSize prefixes.
422 // MMXIi8 - MMX instructions with ImmT == Imm8 and TB prefix.
423 // MMXIi8 - MMX instructions with ImmT == Imm8 and TB prefix.
424 // MMXID - MMX instructions with XD prefix.
425 // MMXIS - MMX instructions with XS prefix.
426 class MMXI<bits<8> o, Format F, dag outs, dag ins, string asm,
428 : I<o, F, outs, ins, asm, pattern>, TB, Requires<[HasMMX]>;
429 class MMXI64<bits<8> o, Format F, dag outs, dag ins, string asm,
431 : I<o, F, outs, ins, asm, pattern>, TB, Requires<[HasMMX,In64BitMode]>;
432 class MMXRI<bits<8> o, Format F, dag outs, dag ins, string asm,
434 : I<o, F, outs, ins, asm, pattern>, TB, REX_W, Requires<[HasMMX]>;
435 class MMX2I<bits<8> o, Format F, dag outs, dag ins, string asm,
437 : I<o, F, outs, ins, asm, pattern>, TB, OpSize, Requires<[HasMMX]>;
438 class MMXIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
440 : Ii8<o, F, outs, ins, asm, pattern>, TB, Requires<[HasMMX]>;
441 class MMXID<bits<8> o, Format F, dag outs, dag ins, string asm,
443 : Ii8<o, F, outs, ins, asm, pattern>, XD, Requires<[HasMMX]>;
444 class MMXIS<bits<8> o, Format F, dag outs, dag ins, string asm,
446 : Ii8<o, F, outs, ins, asm, pattern>, XS, Requires<[HasMMX]>;