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>;
34 // ImmType - This specifies the immediate type used by an instruction. This is
35 // part of the ad-hoc solution used to emit machine instruction encodings by our
36 // machine code emitter.
37 class ImmType<bits<3> val> {
40 def NoImm : ImmType<0>;
41 def Imm8 : ImmType<1>;
42 def Imm16 : ImmType<2>;
43 def Imm32 : ImmType<3>;
44 def Imm64 : ImmType<4>;
46 // FPFormat - This specifies what form this FP instruction has. This is used by
47 // the Floating-Point stackifier pass.
48 class FPFormat<bits<3> val> {
51 def NotFP : FPFormat<0>;
52 def ZeroArgFP : FPFormat<1>;
53 def OneArgFP : FPFormat<2>;
54 def OneArgFPRW : FPFormat<3>;
55 def TwoArgFP : FPFormat<4>;
56 def CompareFP : FPFormat<5>;
57 def CondMovFP : FPFormat<6>;
58 def SpecialFP : FPFormat<7>;
60 // Prefix byte classes which are used to indicate to the ad-hoc machine code
61 // emitter that various prefix bytes are required.
62 class OpSize { bit hasOpSizePrefix = 1; }
63 class AdSize { bit hasAdSizePrefix = 1; }
64 class REX_W { bit hasREX_WPrefix = 1; }
65 class LOCK { bit hasLockPrefix = 1; }
66 class SegFS { bits<2> SegOvrBits = 1; }
67 class SegGS { bits<2> SegOvrBits = 2; }
68 class TB { bits<4> Prefix = 1; }
69 class REP { bits<4> Prefix = 2; }
70 class D8 { bits<4> Prefix = 3; }
71 class D9 { bits<4> Prefix = 4; }
72 class DA { bits<4> Prefix = 5; }
73 class DB { bits<4> Prefix = 6; }
74 class DC { bits<4> Prefix = 7; }
75 class DD { bits<4> Prefix = 8; }
76 class DE { bits<4> Prefix = 9; }
77 class DF { bits<4> Prefix = 10; }
78 class XD { bits<4> Prefix = 11; }
79 class XS { bits<4> Prefix = 12; }
80 class T8 { bits<4> Prefix = 13; }
81 class TA { bits<4> Prefix = 14; }
82 class TF { bits<4> Prefix = 15; }
84 class X86Inst<bits<8> opcod, Format f, ImmType i, dag outs, dag ins,
87 let Namespace = "X86";
89 bits<8> Opcode = opcod;
91 bits<6> FormBits = Form.Value;
93 bits<3> ImmTypeBits = ImmT.Value;
95 dag OutOperandList = outs;
96 dag InOperandList = ins;
97 string AsmString = AsmStr;
100 // Attributes specific to X86 instructions...
102 bit hasOpSizePrefix = 0; // Does this inst have a 0x66 prefix?
103 bit hasAdSizePrefix = 0; // Does this inst have a 0x67 prefix?
105 bits<4> Prefix = 0; // Which prefix byte does this inst have?
106 bit hasREX_WPrefix = 0; // Does this inst requires the REX.W prefix?
107 FPFormat FPForm; // What flavor of FP instruction is this?
108 bits<3> FPFormBits = 0;
109 bit hasLockPrefix = 0; // Does this inst have a 0xF0 prefix?
110 bits<2> SegOvrBits = 0; // Segment override prefix.
113 class I<bits<8> o, Format f, dag outs, dag ins, string asm, list<dag> pattern>
114 : X86Inst<o, f, NoImm, outs, ins, asm> {
115 let Pattern = pattern;
118 class Ii8 <bits<8> o, Format f, dag outs, dag ins, string asm,
120 : X86Inst<o, f, Imm8 , outs, ins, asm> {
121 let Pattern = pattern;
124 class Ii16<bits<8> o, Format f, dag outs, dag ins, string asm,
126 : X86Inst<o, f, Imm16, outs, ins, asm> {
127 let Pattern = pattern;
130 class Ii32<bits<8> o, Format f, dag outs, dag ins, string asm,
132 : X86Inst<o, f, Imm32, outs, ins, asm> {
133 let Pattern = pattern;
137 // FPStack Instruction Templates:
138 // FPI - Floating Point Instruction template.
139 class FPI<bits<8> o, Format F, dag outs, dag ins, string asm>
140 : I<o, F, outs, ins, asm, []> {}
142 // FpI_ - Floating Point Psuedo Instruction template. Not Predicated.
143 class FpI_<dag outs, dag ins, FPFormat fp, list<dag> pattern>
144 : X86Inst<0, Pseudo, NoImm, outs, ins, ""> {
145 let FPForm = fp; let FPFormBits = FPForm.Value;
146 let Pattern = pattern;
149 // Templates for instructions that use a 16- or 32-bit segmented address as
150 // their only operand: lcall (FAR CALL) and ljmp (FAR JMP)
152 // Iseg16 - 16-bit segment selector, 16-bit offset
153 // Iseg32 - 16-bit segment selector, 32-bit offset
155 class Iseg16 <bits<8> o, Format f, dag outs, dag ins, string asm,
156 list<dag> pattern> : X86Inst<o, f, NoImm, outs, ins, asm> {
157 let Pattern = pattern;
161 class Iseg32 <bits<8> o, Format f, dag outs, dag ins, string asm,
162 list<dag> pattern> : X86Inst<o, f, NoImm, outs, ins, asm> {
163 let Pattern = pattern;
167 // SSE1 Instruction Templates:
169 // SSI - SSE1 instructions with XS prefix.
170 // PSI - SSE1 instructions with TB prefix.
171 // PSIi8 - SSE1 instructions with ImmT == Imm8 and TB prefix.
173 class SSI<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
174 : I<o, F, outs, ins, asm, pattern>, XS, Requires<[HasSSE1]>;
175 class SSIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
177 : Ii8<o, F, outs, ins, asm, pattern>, XS, Requires<[HasSSE1]>;
178 class PSI<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
179 : I<o, F, outs, ins, asm, pattern>, TB, Requires<[HasSSE1]>;
180 class PSIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
182 : Ii8<o, F, outs, ins, asm, pattern>, TB, Requires<[HasSSE1]>;
184 // SSE2 Instruction Templates:
186 // SDI - SSE2 instructions with XD prefix.
187 // SDIi8 - SSE2 instructions with ImmT == Imm8 and XD prefix.
188 // SSDIi8 - SSE2 instructions with ImmT == Imm8 and XS prefix.
189 // PDI - SSE2 instructions with TB and OpSize prefixes.
190 // PDIi8 - SSE2 instructions with ImmT == Imm8 and TB and OpSize prefixes.
192 class SDI<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
193 : I<o, F, outs, ins, asm, pattern>, XD, Requires<[HasSSE2]>;
194 class SDIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
196 : Ii8<o, F, outs, ins, asm, pattern>, XD, Requires<[HasSSE2]>;
197 class SSDIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
199 : Ii8<o, F, outs, ins, asm, pattern>, XS, Requires<[HasSSE2]>;
200 class PDI<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
201 : I<o, F, outs, ins, asm, pattern>, TB, OpSize, Requires<[HasSSE2]>;
202 class PDIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
204 : Ii8<o, F, outs, ins, asm, pattern>, TB, OpSize, Requires<[HasSSE2]>;
206 // SSE3 Instruction Templates:
208 // S3I - SSE3 instructions with TB and OpSize prefixes.
209 // S3SI - SSE3 instructions with XS prefix.
210 // S3DI - SSE3 instructions with XD prefix.
212 class S3SI<bits<8> o, Format F, dag outs, dag ins, string asm,
214 : I<o, F, outs, ins, asm, pattern>, XS, Requires<[HasSSE3]>;
215 class S3DI<bits<8> o, Format F, dag outs, dag ins, string asm,
217 : I<o, F, outs, ins, asm, pattern>, XD, Requires<[HasSSE3]>;
218 class S3I<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
219 : I<o, F, outs, ins, asm, pattern>, TB, OpSize, Requires<[HasSSE3]>;
222 // SSSE3 Instruction Templates:
224 // SS38I - SSSE3 instructions with T8 prefix.
225 // SS3AI - SSSE3 instructions with TA prefix.
227 // Note: SSSE3 instructions have 64-bit and 128-bit versions. The 64-bit version
228 // uses the MMX registers. We put those instructions here because they better
229 // fit into the SSSE3 instruction category rather than the MMX category.
231 class SS38I<bits<8> o, Format F, dag outs, dag ins, string asm,
233 : Ii8<o, F, outs, ins, asm, pattern>, T8, Requires<[HasSSSE3]>;
234 class SS3AI<bits<8> o, Format F, dag outs, dag ins, string asm,
236 : Ii8<o, F, outs, ins, asm, pattern>, TA, Requires<[HasSSSE3]>;
238 // SSE4.1 Instruction Templates:
240 // SS48I - SSE 4.1 instructions with T8 prefix.
241 // SS41AIi8 - SSE 4.1 instructions with TA prefix and ImmT == Imm8.
243 class SS48I<bits<8> o, Format F, dag outs, dag ins, string asm,
245 : I<o, F, outs, ins, asm, pattern>, T8, Requires<[HasSSE41]>;
246 class SS4AIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
248 : Ii8<o, F, outs, ins, asm, pattern>, TA, Requires<[HasSSE41]>;
250 // SSE4.2 Instruction Templates:
252 // SS428I - SSE 4.2 instructions with T8 prefix.
253 class SS428I<bits<8> o, Format F, dag outs, dag ins, string asm,
255 : I<o, F, outs, ins, asm, pattern>, T8, Requires<[HasSSE42]>;
257 // SS42FI - SSE 4.2 instructions with TF prefix.
258 class SS42FI<bits<8> o, Format F, dag outs, dag ins, string asm,
260 : I<o, F, outs, ins, asm, pattern>, TF, Requires<[HasSSE42]>;
262 // SS42AI = SSE 4.2 instructions with TA prefix
263 class SS42AI<bits<8> o, Format F, dag outs, dag ins, string asm,
265 : I<o, F, outs, ins, asm, pattern>, TA, Requires<[HasSSE42]>;
267 // X86-64 Instruction templates...
270 class RI<bits<8> o, Format F, dag outs, dag ins, string asm, list<dag> pattern>
271 : I<o, F, outs, ins, asm, pattern>, REX_W;
272 class RIi8 <bits<8> o, Format F, dag outs, dag ins, string asm,
274 : Ii8<o, F, outs, ins, asm, pattern>, REX_W;
275 class RIi32 <bits<8> o, Format F, dag outs, dag ins, string asm,
277 : Ii32<o, F, outs, ins, asm, pattern>, REX_W;
279 class RIi64<bits<8> o, Format f, dag outs, dag ins, string asm,
281 : X86Inst<o, f, Imm64, outs, ins, asm>, REX_W {
282 let Pattern = pattern;
286 class RSSI<bits<8> o, Format F, dag outs, dag ins, string asm,
288 : SSI<o, F, outs, ins, asm, pattern>, REX_W;
289 class RSDI<bits<8> o, Format F, dag outs, dag ins, string asm,
291 : SDI<o, F, outs, ins, asm, pattern>, REX_W;
292 class RPDI<bits<8> o, Format F, dag outs, dag ins, string asm,
294 : PDI<o, F, outs, ins, asm, pattern>, REX_W;
296 // MMX Instruction templates
299 // MMXI - MMX instructions with TB prefix.
300 // MMXI64 - MMX instructions with TB prefix valid only in 64 bit mode.
301 // MMX2I - MMX / SSE2 instructions with TB and OpSize prefixes.
302 // MMXIi8 - MMX instructions with ImmT == Imm8 and TB prefix.
303 // MMXIi8 - MMX instructions with ImmT == Imm8 and TB prefix.
304 // MMXID - MMX instructions with XD prefix.
305 // MMXIS - MMX instructions with XS prefix.
306 class MMXI<bits<8> o, Format F, dag outs, dag ins, string asm,
308 : I<o, F, outs, ins, asm, pattern>, TB, Requires<[HasMMX]>;
309 class MMXI64<bits<8> o, Format F, dag outs, dag ins, string asm,
311 : I<o, F, outs, ins, asm, pattern>, TB, Requires<[HasMMX,In64BitMode]>;
312 class MMXRI<bits<8> o, Format F, dag outs, dag ins, string asm,
314 : I<o, F, outs, ins, asm, pattern>, TB, REX_W, Requires<[HasMMX]>;
315 class MMX2I<bits<8> o, Format F, dag outs, dag ins, string asm,
317 : I<o, F, outs, ins, asm, pattern>, TB, OpSize, Requires<[HasMMX]>;
318 class MMXIi8<bits<8> o, Format F, dag outs, dag ins, string asm,
320 : Ii8<o, F, outs, ins, asm, pattern>, TB, Requires<[HasMMX]>;
321 class MMXID<bits<8> o, Format F, dag outs, dag ins, string asm,
323 : Ii8<o, F, outs, ins, asm, pattern>, XD, Requires<[HasMMX]>;
324 class MMXIS<bits<8> o, Format F, dag outs, dag ins, string asm,
326 : Ii8<o, F, outs, ins, asm, pattern>, XS, Requires<[HasMMX]>;