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 // Prefix byte classes which are used to indicate to the ad-hoc machine code
72 // emitter that various prefix bytes are required.
73 class OpSize { bit hasOpSizePrefix = 1; }
74 class AdSize { bit hasAdSizePrefix = 1; }
75 class REX_W { bit hasREX_WPrefix = 1; }
76 class LOCK { bit hasLockPrefix = 1; }
77 class SegFS { bits<2> SegOvrBits = 1; }
78 class SegGS { bits<2> SegOvrBits = 2; }
79 class TB { bits<4> Prefix = 1; }
80 class REP { bits<4> Prefix = 2; }
81 class D8 { bits<4> Prefix = 3; }
82 class D9 { bits<4> Prefix = 4; }
83 class DA { bits<4> Prefix = 5; }
84 class DB { bits<4> Prefix = 6; }
85 class DC { bits<4> Prefix = 7; }
86 class DD { bits<4> Prefix = 8; }
87 class DE { bits<4> Prefix = 9; }
88 class DF { bits<4> Prefix = 10; }
89 class XD { bits<4> Prefix = 11; }
90 class XS { bits<4> Prefix = 12; }
91 class T8 { bits<4> Prefix = 13; }
92 class TA { bits<4> Prefix = 14; }
93 class TF { bits<4> Prefix = 15; }
95 class X86Inst<bits<8> opcod, Format f, ImmType i, dag outs, dag ins,
98 let Namespace = "X86";
100 bits<8> Opcode = opcod;
102 bits<6> FormBits = Form.Value;
104 bits<3> ImmTypeBits = ImmT.Value;
106 dag OutOperandList = outs;
107 dag InOperandList = ins;
108 string AsmString = AsmStr;
111 // Attributes specific to X86 instructions...
113 bit hasOpSizePrefix = 0; // Does this inst have a 0x66 prefix?
114 bit hasAdSizePrefix = 0; // Does this inst have a 0x67 prefix?
116 bits<4> Prefix = 0; // Which prefix byte does this inst have?
117 bit hasREX_WPrefix = 0; // Does this inst requires the REX.W prefix?
118 FPFormat FPForm; // What flavor of FP instruction is this?
119 bits<3> FPFormBits = 0;
120 bit hasLockPrefix = 0; // Does this inst have a 0xF0 prefix?
121 bits<2> SegOvrBits = 0; // Segment override prefix.
124 class I<bits<8> o, Format f, dag outs, dag ins, string asm, list<dag> pattern>
125 : X86Inst<o, f, NoImm, outs, ins, asm> {
126 let Pattern = pattern;
129 class Ii8 <bits<8> o, Format f, dag outs, dag ins, string asm,
131 : X86Inst<o, f, Imm8 , outs, ins, asm> {
132 let Pattern = pattern;
135 class Ii8PCRel<bits<8> o, Format f, dag outs, dag ins, string asm,
137 : X86Inst<o, f, Imm8PCRel, outs, ins, asm> {
138 let Pattern = pattern;
141 class Ii16<bits<8> o, Format f, dag outs, dag ins, string asm,
143 : X86Inst<o, f, Imm16, outs, ins, asm> {
144 let Pattern = pattern;
147 class Ii32<bits<8> o, Format f, dag outs, dag ins, string asm,
149 : X86Inst<o, f, Imm32, outs, ins, asm> {
150 let Pattern = pattern;
154 class Ii32PCRel<bits<8> o, Format f, dag outs, dag ins, string asm,
156 : X86Inst<o, f, Imm32PCRel, outs, ins, asm> {
157 let Pattern = pattern;
161 // FPStack Instruction Templates:
162 // FPI - Floating Point Instruction template.
163 class FPI<bits<8> o, Format F, dag outs, dag ins, string asm>
164 : I<o, F, outs, ins, asm, []> {}
166 // FpI_ - Floating Point Psuedo Instruction template. Not Predicated.
167 class FpI_<dag outs, dag ins, FPFormat fp, list<dag> pattern>
168 : X86Inst<0, Pseudo, NoImm, outs, ins, ""> {
169 let FPForm = fp; let FPFormBits = FPForm.Value;
170 let Pattern = pattern;
173 // Templates for instructions that use a 16- or 32-bit segmented address as
174 // their only operand: lcall (FAR CALL) and ljmp (FAR JMP)
176 // Iseg16 - 16-bit segment selector, 16-bit offset
177 // Iseg32 - 16-bit segment selector, 32-bit offset
179 class Iseg16 <bits<8> o, Format f, dag outs, dag ins, string asm,
180 list<dag> pattern> : X86Inst<o, f, NoImm, outs, ins, asm> {
181 let Pattern = pattern;
185 class Iseg32 <bits<8> o, Format f, dag outs, dag ins, string asm,
186 list<dag> pattern> : X86Inst<o, f, NoImm, outs, ins, asm> {
187 let Pattern = pattern;
191 // SSE1 Instruction Templates:
193 // SSI - SSE1 instructions with XS prefix.
194 // PSI - SSE1 instructions with TB prefix.
195 // PSIi8 - SSE1 instructions with ImmT == Imm8 and TB prefix.
197 class SSI<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
198 : I<o, F, outs, ins, asm, pattern>, XS, Requires<[HasSSE1]>;
199 class SSIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
201 : Ii8<o, F, outs, ins, asm, pattern>, XS, Requires<[HasSSE1]>;
202 class PSI<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
203 : I<o, F, outs, ins, asm, pattern>, TB, Requires<[HasSSE1]>;
204 class PSIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
206 : Ii8<o, F, outs, ins, asm, pattern>, TB, Requires<[HasSSE1]>;
208 // SSE2 Instruction Templates:
210 // SDI - SSE2 instructions with XD prefix.
211 // SDIi8 - SSE2 instructions with ImmT == Imm8 and XD prefix.
212 // SSDIi8 - SSE2 instructions with ImmT == Imm8 and XS prefix.
213 // PDI - SSE2 instructions with TB and OpSize prefixes.
214 // PDIi8 - SSE2 instructions with ImmT == Imm8 and TB and OpSize prefixes.
216 class SDI<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
217 : I<o, F, outs, ins, asm, pattern>, XD, Requires<[HasSSE2]>;
218 class SDIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
220 : Ii8<o, F, outs, ins, asm, pattern>, XD, Requires<[HasSSE2]>;
221 class SSDIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
223 : Ii8<o, F, outs, ins, asm, pattern>, XS, Requires<[HasSSE2]>;
224 class PDI<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
225 : I<o, F, outs, ins, asm, pattern>, TB, OpSize, Requires<[HasSSE2]>;
226 class PDIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
228 : Ii8<o, F, outs, ins, asm, pattern>, TB, OpSize, Requires<[HasSSE2]>;
230 // SSE3 Instruction Templates:
232 // S3I - SSE3 instructions with TB and OpSize prefixes.
233 // S3SI - SSE3 instructions with XS prefix.
234 // S3DI - SSE3 instructions with XD prefix.
236 class S3SI<bits<8> o, Format F, dag outs, dag ins, string asm,
238 : I<o, F, outs, ins, asm, pattern>, XS, Requires<[HasSSE3]>;
239 class S3DI<bits<8> o, Format F, dag outs, dag ins, string asm,
241 : I<o, F, outs, ins, asm, pattern>, XD, Requires<[HasSSE3]>;
242 class S3I<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
243 : I<o, F, outs, ins, asm, pattern>, TB, OpSize, Requires<[HasSSE3]>;
246 // SSSE3 Instruction Templates:
248 // SS38I - SSSE3 instructions with T8 prefix.
249 // SS3AI - SSSE3 instructions with TA prefix.
251 // Note: SSSE3 instructions have 64-bit and 128-bit versions. The 64-bit version
252 // uses the MMX registers. We put those instructions here because they better
253 // fit into the SSSE3 instruction category rather than the MMX category.
255 class SS38I<bits<8> o, Format F, dag outs, dag ins, string asm,
257 : Ii8<o, F, outs, ins, asm, pattern>, T8, Requires<[HasSSSE3]>;
258 class SS3AI<bits<8> o, Format F, dag outs, dag ins, string asm,
260 : Ii8<o, F, outs, ins, asm, pattern>, TA, Requires<[HasSSSE3]>;
262 // SSE4.1 Instruction Templates:
264 // SS48I - SSE 4.1 instructions with T8 prefix.
265 // SS41AIi8 - SSE 4.1 instructions with TA prefix and ImmT == Imm8.
267 class SS48I<bits<8> o, Format F, dag outs, dag ins, string asm,
269 : I<o, F, outs, ins, asm, pattern>, T8, Requires<[HasSSE41]>;
270 class SS4AIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
272 : Ii8<o, F, outs, ins, asm, pattern>, TA, Requires<[HasSSE41]>;
274 // SSE4.2 Instruction Templates:
276 // SS428I - SSE 4.2 instructions with T8 prefix.
277 class SS428I<bits<8> o, Format F, dag outs, dag ins, string asm,
279 : I<o, F, outs, ins, asm, pattern>, T8, Requires<[HasSSE42]>;
281 // SS42FI - SSE 4.2 instructions with TF prefix.
282 class SS42FI<bits<8> o, Format F, dag outs, dag ins, string asm,
284 : I<o, F, outs, ins, asm, pattern>, TF, Requires<[HasSSE42]>;
286 // SS42AI = SSE 4.2 instructions with TA prefix
287 class SS42AI<bits<8> o, Format F, dag outs, dag ins, string asm,
289 : Ii8<o, F, outs, ins, asm, pattern>, TA, Requires<[HasSSE42]>;
291 // X86-64 Instruction templates...
294 class RI<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
295 : I<o, F, outs, ins, asm, pattern>, REX_W;
296 class RIi8 <bits<8> o, Format F, dag outs, dag ins, string asm,
298 : Ii8<o, F, outs, ins, asm, pattern>, REX_W;
299 class RIi32 <bits<8> o, Format F, dag outs, dag ins, string asm,
301 : Ii32<o, F, outs, ins, asm, pattern>, REX_W;
303 class RIi64<bits<8> o, Format f, dag outs, dag ins, string asm,
305 : X86Inst<o, f, Imm64, outs, ins, asm>, REX_W {
306 let Pattern = pattern;
310 class RSSI<bits<8> o, Format F, dag outs, dag ins, string asm,
312 : SSI<o, F, outs, ins, asm, pattern>, REX_W;
313 class RSDI<bits<8> o, Format F, dag outs, dag ins, string asm,
315 : SDI<o, F, outs, ins, asm, pattern>, REX_W;
316 class RPDI<bits<8> o, Format F, dag outs, dag ins, string asm,
318 : PDI<o, F, outs, ins, asm, pattern>, REX_W;
320 // MMX Instruction templates
323 // MMXI - MMX instructions with TB prefix.
324 // MMXI64 - MMX instructions with TB prefix valid only in 64 bit mode.
325 // MMX2I - MMX / SSE2 instructions with TB and OpSize prefixes.
326 // MMXIi8 - MMX instructions with ImmT == Imm8 and TB prefix.
327 // MMXIi8 - MMX instructions with ImmT == Imm8 and TB prefix.
328 // MMXID - MMX instructions with XD prefix.
329 // MMXIS - MMX instructions with XS prefix.
330 class MMXI<bits<8> o, Format F, dag outs, dag ins, string asm,
332 : I<o, F, outs, ins, asm, pattern>, TB, Requires<[HasMMX]>;
333 class MMXI64<bits<8> o, Format F, dag outs, dag ins, string asm,
335 : I<o, F, outs, ins, asm, pattern>, TB, Requires<[HasMMX,In64BitMode]>;
336 class MMXRI<bits<8> o, Format F, dag outs, dag ins, string asm,
338 : I<o, F, outs, ins, asm, pattern>, TB, REX_W, Requires<[HasMMX]>;
339 class MMX2I<bits<8> o, Format F, dag outs, dag ins, string asm,
341 : I<o, F, outs, ins, asm, pattern>, TB, OpSize, Requires<[HasMMX]>;
342 class MMXIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
344 : Ii8<o, F, outs, ins, asm, pattern>, TB, Requires<[HasMMX]>;
345 class MMXID<bits<8> o, Format F, dag outs, dag ins, string asm,
347 : Ii8<o, F, outs, ins, asm, pattern>, XD, Requires<[HasMMX]>;
348 class MMXIS<bits<8> o, Format F, dag outs, dag ins, string asm,
350 : Ii8<o, F, outs, ins, asm, pattern>, XS, Requires<[HasMMX]>;