1 //===-- X86.td - Target definition file for the Intel X86 --*- 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 // This is a target description file for the Intel i386 architecture, referred
11 // to here as the "X86" architecture.
13 //===----------------------------------------------------------------------===//
15 // Get the target-independent interfaces which we are implementing...
17 include "llvm/Target/Target.td"
19 //===----------------------------------------------------------------------===//
20 // X86 Subtarget state
23 def Mode64Bit : SubtargetFeature<"64bit-mode", "In64BitMode", "true",
24 "64-bit mode (x86_64)">;
25 def Mode32Bit : SubtargetFeature<"32bit-mode", "In32BitMode", "true",
26 "32-bit mode (80386)">;
27 def Mode16Bit : SubtargetFeature<"16bit-mode", "In16BitMode", "true",
28 "16-bit mode (i8086)">;
30 //===----------------------------------------------------------------------===//
31 // X86 Subtarget features
32 //===----------------------------------------------------------------------===//
34 def FeatureCMOV : SubtargetFeature<"cmov","HasCMov", "true",
35 "Enable conditional move instructions">;
37 def FeaturePOPCNT : SubtargetFeature<"popcnt", "HasPOPCNT", "true",
38 "Support POPCNT instruction">;
41 def FeatureMMX : SubtargetFeature<"mmx","X86SSELevel", "MMX",
42 "Enable MMX instructions">;
43 def FeatureSSE1 : SubtargetFeature<"sse", "X86SSELevel", "SSE1",
44 "Enable SSE instructions",
45 // SSE codegen depends on cmovs, and all
46 // SSE1+ processors support them.
47 [FeatureMMX, FeatureCMOV]>;
48 def FeatureSSE2 : SubtargetFeature<"sse2", "X86SSELevel", "SSE2",
49 "Enable SSE2 instructions",
51 def FeatureSSE3 : SubtargetFeature<"sse3", "X86SSELevel", "SSE3",
52 "Enable SSE3 instructions",
54 def FeatureSSSE3 : SubtargetFeature<"ssse3", "X86SSELevel", "SSSE3",
55 "Enable SSSE3 instructions",
57 def FeatureSSE41 : SubtargetFeature<"sse4.1", "X86SSELevel", "SSE41",
58 "Enable SSE 4.1 instructions",
60 def FeatureSSE42 : SubtargetFeature<"sse4.2", "X86SSELevel", "SSE42",
61 "Enable SSE 4.2 instructions",
63 def Feature3DNow : SubtargetFeature<"3dnow", "X863DNowLevel", "ThreeDNow",
64 "Enable 3DNow! instructions",
66 def Feature3DNowA : SubtargetFeature<"3dnowa", "X863DNowLevel", "ThreeDNowA",
67 "Enable 3DNow! Athlon instructions",
69 // All x86-64 hardware has SSE2, but we don't mark SSE2 as an implied
70 // feature, because SSE2 can be disabled (e.g. for compiling OS kernels)
71 // without disabling 64-bit mode.
72 def Feature64Bit : SubtargetFeature<"64bit", "HasX86_64", "true",
73 "Support 64-bit instructions",
75 def FeatureCMPXCHG16B : SubtargetFeature<"cx16", "HasCmpxchg16b", "true",
76 "64-bit with cmpxchg16b",
78 def FeatureSlowBTMem : SubtargetFeature<"slow-bt-mem", "IsBTMemSlow", "true",
79 "Bit testing of memory is slow">;
80 def FeatureSlowSHLD : SubtargetFeature<"slow-shld", "IsSHLDSlow", "true",
81 "SHLD instruction is slow">;
82 def FeatureFastUAMem : SubtargetFeature<"fast-unaligned-mem",
83 "IsUAMemFast", "true",
84 "Fast unaligned memory access">;
85 def FeatureSSE4A : SubtargetFeature<"sse4a", "HasSSE4A", "true",
86 "Support SSE 4a instructions",
89 def FeatureAVX : SubtargetFeature<"avx", "X86SSELevel", "AVX",
90 "Enable AVX instructions",
92 def FeatureAVX2 : SubtargetFeature<"avx2", "X86SSELevel", "AVX2",
93 "Enable AVX2 instructions",
95 def FeatureAVX512 : SubtargetFeature<"avx512f", "X86SSELevel", "AVX512F",
96 "Enable AVX-512 instructions",
98 def FeatureERI : SubtargetFeature<"avx512er", "HasERI", "true",
99 "Enable AVX-512 Exponential and Reciprocal Instructions",
101 def FeatureCDI : SubtargetFeature<"avx512cd", "HasCDI", "true",
102 "Enable AVX-512 Conflict Detection Instructions",
104 def FeaturePFI : SubtargetFeature<"avx512pf", "HasPFI", "true",
105 "Enable AVX-512 PreFetch Instructions",
107 def FeatureDQI : SubtargetFeature<"avx512dq", "HasDQI", "true",
108 "Enable AVX-512 Doubleword and Quadword Instructions",
110 def FeatureBWI : SubtargetFeature<"avx512bw", "HasBWI", "true",
111 "Enable AVX-512 Byte and Word Instructions",
113 def FeatureVLX : SubtargetFeature<"avx512vl", "HasVLX", "true",
114 "Enable AVX-512 Vector Length eXtensions",
116 def FeaturePCLMUL : SubtargetFeature<"pclmul", "HasPCLMUL", "true",
117 "Enable packed carry-less multiplication instructions",
119 def FeatureFMA : SubtargetFeature<"fma", "HasFMA", "true",
120 "Enable three-operand fused multiple-add",
122 def FeatureFMA4 : SubtargetFeature<"fma4", "HasFMA4", "true",
123 "Enable four-operand fused multiple-add",
124 [FeatureAVX, FeatureSSE4A]>;
125 def FeatureXOP : SubtargetFeature<"xop", "HasXOP", "true",
126 "Enable XOP instructions",
128 def FeatureVectorUAMem : SubtargetFeature<"vector-unaligned-mem",
129 "HasVectorUAMem", "true",
130 "Allow unaligned memory operands on vector/SIMD instructions">;
131 def FeatureAES : SubtargetFeature<"aes", "HasAES", "true",
132 "Enable AES instructions",
134 def FeatureTBM : SubtargetFeature<"tbm", "HasTBM", "true",
135 "Enable TBM instructions">;
136 def FeatureMOVBE : SubtargetFeature<"movbe", "HasMOVBE", "true",
137 "Support MOVBE instruction">;
138 def FeatureRDRAND : SubtargetFeature<"rdrnd", "HasRDRAND", "true",
139 "Support RDRAND instruction">;
140 def FeatureF16C : SubtargetFeature<"f16c", "HasF16C", "true",
141 "Support 16-bit floating point conversion instructions",
143 def FeatureFSGSBase : SubtargetFeature<"fsgsbase", "HasFSGSBase", "true",
144 "Support FS/GS Base instructions">;
145 def FeatureLZCNT : SubtargetFeature<"lzcnt", "HasLZCNT", "true",
146 "Support LZCNT instruction">;
147 def FeatureBMI : SubtargetFeature<"bmi", "HasBMI", "true",
148 "Support BMI instructions">;
149 def FeatureBMI2 : SubtargetFeature<"bmi2", "HasBMI2", "true",
150 "Support BMI2 instructions">;
151 def FeatureRTM : SubtargetFeature<"rtm", "HasRTM", "true",
152 "Support RTM instructions">;
153 def FeatureHLE : SubtargetFeature<"hle", "HasHLE", "true",
155 def FeatureADX : SubtargetFeature<"adx", "HasADX", "true",
156 "Support ADX instructions">;
157 def FeatureSHA : SubtargetFeature<"sha", "HasSHA", "true",
158 "Enable SHA instructions",
160 def FeatureSGX : SubtargetFeature<"sgx", "HasSGX", "true",
161 "Support SGX instructions">;
162 def FeaturePRFCHW : SubtargetFeature<"prfchw", "HasPRFCHW", "true",
163 "Support PRFCHW instructions">;
164 def FeatureRDSEED : SubtargetFeature<"rdseed", "HasRDSEED", "true",
165 "Support RDSEED instruction">;
166 def FeatureLeaForSP : SubtargetFeature<"lea-sp", "UseLeaForSP", "true",
167 "Use LEA for adjusting the stack pointer">;
168 def FeatureSlowDivide : SubtargetFeature<"idiv-to-divb",
169 "HasSlowDivide", "true",
170 "Use small divide for positive values less than 256">;
171 def FeaturePadShortFunctions : SubtargetFeature<"pad-short-functions",
172 "PadShortFunctions", "true",
173 "Pad short functions">;
174 def FeatureCallRegIndirect : SubtargetFeature<"call-reg-indirect",
175 "CallRegIndirect", "true",
176 "Call register indirect">;
177 def FeatureLEAUsesAG : SubtargetFeature<"lea-uses-ag", "LEAUsesAG", "true",
178 "LEA instruction needs inputs at AG stage">;
179 def FeatureSlowLEA : SubtargetFeature<"slow-lea", "SlowLEA", "true",
180 "LEA instruction with certain arguments is slow">;
181 def FeatureSlowIncDec : SubtargetFeature<"slow-incdec", "SlowIncDec", "true",
182 "INC and DEC instructions are slower than ADD and SUB">;
184 //===----------------------------------------------------------------------===//
185 // X86 processors supported.
186 //===----------------------------------------------------------------------===//
188 include "X86Schedule.td"
190 def ProcIntelAtom : SubtargetFeature<"atom", "X86ProcFamily", "IntelAtom",
191 "Intel Atom processors">;
192 def ProcIntelSLM : SubtargetFeature<"slm", "X86ProcFamily", "IntelSLM",
193 "Intel Silvermont processors">;
195 class Proc<string Name, list<SubtargetFeature> Features>
196 : ProcessorModel<Name, GenericModel, Features>;
198 def : Proc<"generic", []>;
199 def : Proc<"i386", []>;
200 def : Proc<"i486", []>;
201 def : Proc<"i586", []>;
202 def : Proc<"pentium", []>;
203 def : Proc<"pentium-mmx", [FeatureMMX]>;
204 def : Proc<"i686", []>;
205 def : Proc<"pentiumpro", [FeatureCMOV]>;
206 def : Proc<"pentium2", [FeatureMMX, FeatureCMOV]>;
207 def : Proc<"pentium3", [FeatureSSE1]>;
208 def : Proc<"pentium3m", [FeatureSSE1, FeatureSlowBTMem]>;
209 def : Proc<"pentium-m", [FeatureSSE2, FeatureSlowBTMem]>;
210 def : Proc<"pentium4", [FeatureSSE2]>;
211 def : Proc<"pentium4m", [FeatureSSE2, FeatureSlowBTMem]>;
214 def : ProcessorModel<"yonah", SandyBridgeModel,
215 [FeatureSSE3, FeatureSlowBTMem]>;
218 def : Proc<"prescott", [FeatureSSE3, FeatureSlowBTMem]>;
219 def : Proc<"nocona", [FeatureSSE3, FeatureCMPXCHG16B, FeatureSlowBTMem]>;
221 // Intel Core 2 Solo/Duo.
222 def : ProcessorModel<"core2", SandyBridgeModel,
223 [FeatureSSSE3, FeatureCMPXCHG16B, FeatureSlowBTMem]>;
224 def : ProcessorModel<"penryn", SandyBridgeModel,
225 [FeatureSSE41, FeatureCMPXCHG16B, FeatureSlowBTMem]>;
228 def : ProcessorModel<"atom", AtomModel,
229 [ProcIntelAtom, FeatureSSSE3, FeatureCMPXCHG16B,
230 FeatureMOVBE, FeatureSlowBTMem, FeatureLeaForSP,
232 FeatureCallRegIndirect,
234 FeaturePadShortFunctions]>;
237 def : ProcessorModel<"slm", SLMModel, [ProcIntelSLM,
238 FeatureSSE42, FeatureCMPXCHG16B,
239 FeatureMOVBE, FeaturePOPCNT,
240 FeaturePCLMUL, FeatureAES,
241 FeatureCallRegIndirect,
243 FeatureSlowLEA, FeatureSlowIncDec,
244 FeatureSlowBTMem, FeatureFastUAMem]>;
245 // "Arrandale" along with corei3 and corei5
246 def : ProcessorModel<"corei7", SandyBridgeModel,
247 [FeatureSSE42, FeatureCMPXCHG16B, FeatureSlowBTMem,
248 FeatureFastUAMem, FeaturePOPCNT, FeatureAES]>;
250 def : ProcessorModel<"nehalem", SandyBridgeModel,
251 [FeatureSSE42, FeatureCMPXCHG16B, FeatureSlowBTMem,
252 FeatureFastUAMem, FeaturePOPCNT]>;
253 // Westmere is a similar machine to nehalem with some additional features.
254 // Westmere is the corei3/i5/i7 path from nehalem to sandybridge
255 def : ProcessorModel<"westmere", SandyBridgeModel,
256 [FeatureSSE42, FeatureCMPXCHG16B, FeatureSlowBTMem,
257 FeatureFastUAMem, FeaturePOPCNT, FeatureAES,
260 // SSE is not listed here since llvm treats AVX as a reimplementation of SSE,
261 // rather than a superset.
262 def : ProcessorModel<"corei7-avx", SandyBridgeModel,
263 [FeatureAVX, FeatureCMPXCHG16B, FeatureFastUAMem,
264 FeaturePOPCNT, FeatureAES, FeaturePCLMUL]>;
266 def : ProcessorModel<"core-avx-i", SandyBridgeModel,
267 [FeatureAVX, FeatureCMPXCHG16B, FeatureFastUAMem,
268 FeaturePOPCNT, FeatureAES, FeaturePCLMUL, FeatureRDRAND,
269 FeatureF16C, FeatureFSGSBase]>;
272 def : ProcessorModel<"core-avx2", HaswellModel,
273 [FeatureAVX2, FeatureCMPXCHG16B, FeatureFastUAMem,
274 FeaturePOPCNT, FeatureAES, FeaturePCLMUL, FeatureRDRAND,
275 FeatureF16C, FeatureFSGSBase, FeatureMOVBE, FeatureLZCNT,
276 FeatureBMI, FeatureBMI2, FeatureFMA, FeatureRTM,
280 // FIXME: define KNL model
281 def : ProcessorModel<"knl", HaswellModel,
282 [FeatureAVX512, FeatureERI, FeatureCDI, FeaturePFI,
283 FeatureCMPXCHG16B, FeatureFastUAMem, FeaturePOPCNT,
284 FeatureAES, FeaturePCLMUL, FeatureRDRAND, FeatureF16C,
285 FeatureFSGSBase, FeatureMOVBE, FeatureLZCNT, FeatureBMI,
286 FeatureBMI2, FeatureFMA, FeatureRTM, FeatureHLE,
290 // FIXME: define SKX model
291 def : ProcessorModel<"skx", HaswellModel,
292 [FeatureAVX512, FeatureCDI,
293 FeatureDQI, FeatureBWI, FeatureVLX,
294 FeatureCMPXCHG16B, FeatureFastUAMem, FeaturePOPCNT,
295 FeatureAES, FeaturePCLMUL, FeatureRDRAND, FeatureF16C,
296 FeatureFSGSBase, FeatureMOVBE, FeatureLZCNT, FeatureBMI,
297 FeatureBMI2, FeatureFMA, FeatureRTM, FeatureHLE,
298 FeatureSlowIncDec, FeatureSGX]>;
300 def : Proc<"k6", [FeatureMMX]>;
301 def : Proc<"k6-2", [Feature3DNow]>;
302 def : Proc<"k6-3", [Feature3DNow]>;
303 def : Proc<"athlon", [Feature3DNowA, FeatureSlowBTMem,
305 def : Proc<"athlon-tbird", [Feature3DNowA, FeatureSlowBTMem,
307 def : Proc<"athlon-4", [FeatureSSE1, Feature3DNowA, FeatureSlowBTMem,
309 def : Proc<"athlon-xp", [FeatureSSE1, Feature3DNowA, FeatureSlowBTMem,
311 def : Proc<"athlon-mp", [FeatureSSE1, Feature3DNowA, FeatureSlowBTMem,
313 def : Proc<"k8", [FeatureSSE2, Feature3DNowA, Feature64Bit,
314 FeatureSlowBTMem, FeatureSlowSHLD]>;
315 def : Proc<"opteron", [FeatureSSE2, Feature3DNowA, Feature64Bit,
316 FeatureSlowBTMem, FeatureSlowSHLD]>;
317 def : Proc<"athlon64", [FeatureSSE2, Feature3DNowA, Feature64Bit,
318 FeatureSlowBTMem, FeatureSlowSHLD]>;
319 def : Proc<"athlon-fx", [FeatureSSE2, Feature3DNowA, Feature64Bit,
320 FeatureSlowBTMem, FeatureSlowSHLD]>;
321 def : Proc<"k8-sse3", [FeatureSSE3, Feature3DNowA, FeatureCMPXCHG16B,
322 FeatureSlowBTMem, FeatureSlowSHLD]>;
323 def : Proc<"opteron-sse3", [FeatureSSE3, Feature3DNowA, FeatureCMPXCHG16B,
324 FeatureSlowBTMem, FeatureSlowSHLD]>;
325 def : Proc<"athlon64-sse3", [FeatureSSE3, Feature3DNowA, FeatureCMPXCHG16B,
326 FeatureSlowBTMem, FeatureSlowSHLD]>;
327 def : Proc<"amdfam10", [FeatureSSE4A,
328 Feature3DNowA, FeatureCMPXCHG16B, FeatureLZCNT,
329 FeaturePOPCNT, FeatureSlowBTMem,
332 def : Proc<"btver1", [FeatureSSSE3, FeatureSSE4A, FeatureCMPXCHG16B,
333 FeaturePRFCHW, FeatureLZCNT, FeaturePOPCNT,
336 def : Proc<"btver2", [FeatureAVX, FeatureSSE4A, FeatureCMPXCHG16B,
337 FeaturePRFCHW, FeatureAES, FeaturePCLMUL,
338 FeatureBMI, FeatureF16C, FeatureMOVBE,
339 FeatureLZCNT, FeaturePOPCNT, FeatureSlowSHLD]>;
341 def : Proc<"bdver1", [FeatureXOP, FeatureFMA4, FeatureCMPXCHG16B,
342 FeatureAES, FeaturePRFCHW, FeaturePCLMUL,
343 FeatureLZCNT, FeaturePOPCNT, FeatureSlowSHLD]>;
345 def : Proc<"bdver2", [FeatureXOP, FeatureFMA4, FeatureCMPXCHG16B,
346 FeatureAES, FeaturePRFCHW, FeaturePCLMUL,
347 FeatureF16C, FeatureLZCNT,
348 FeaturePOPCNT, FeatureBMI, FeatureTBM,
349 FeatureFMA, FeatureSlowSHLD]>;
352 def : Proc<"bdver3", [FeatureXOP, FeatureFMA4, FeatureCMPXCHG16B,
353 FeatureAES, FeaturePRFCHW, FeaturePCLMUL,
354 FeatureF16C, FeatureLZCNT,
355 FeaturePOPCNT, FeatureBMI, FeatureTBM,
356 FeatureFMA, FeatureFSGSBase]>;
359 def : Proc<"bdver4", [FeatureAVX2, FeatureXOP, FeatureFMA4,
360 FeatureCMPXCHG16B, FeatureAES, FeaturePRFCHW,
361 FeaturePCLMUL, FeatureF16C, FeatureLZCNT,
362 FeaturePOPCNT, FeatureBMI, FeatureBMI2,
363 FeatureTBM, FeatureFMA, FeatureFSGSBase]>;
365 def : Proc<"geode", [Feature3DNowA]>;
367 def : Proc<"winchip-c6", [FeatureMMX]>;
368 def : Proc<"winchip2", [Feature3DNow]>;
369 def : Proc<"c3", [Feature3DNow]>;
370 def : Proc<"c3-2", [FeatureSSE1]>;
372 // We also provide a generic 64-bit specific x86 processor model which tries to
373 // be good for modern chips without enabling instruction set encodings past the
374 // basic SSE2 and 64-bit ones. It disables slow things from any mainstream and
375 // modern 64-bit x86 chip, and enables features that are generally beneficial.
377 // We currently use the Sandy Bridge model as the default scheduling model as
378 // we use it across Nehalem, Westmere, Sandy Bridge, and Ivy Bridge which
379 // covers a huge swath of x86 processors. If there are specific scheduling
380 // knobs which need to be tuned differently for AMD chips, we might consider
381 // forming a common base for them.
382 def : ProcessorModel<"x86-64", SandyBridgeModel,
383 [FeatureSSE2, Feature64Bit, FeatureSlowBTMem,
386 //===----------------------------------------------------------------------===//
387 // Register File Description
388 //===----------------------------------------------------------------------===//
390 include "X86RegisterInfo.td"
392 //===----------------------------------------------------------------------===//
393 // Instruction Descriptions
394 //===----------------------------------------------------------------------===//
396 include "X86InstrInfo.td"
398 def X86InstrInfo : InstrInfo;
400 //===----------------------------------------------------------------------===//
401 // Calling Conventions
402 //===----------------------------------------------------------------------===//
404 include "X86CallingConv.td"
407 //===----------------------------------------------------------------------===//
409 //===----------------------------------------------------------------------===//
411 def ATTAsmParser : AsmParser {
412 string AsmParserClassName = "AsmParser";
415 def ATTAsmParserVariant : AsmParserVariant {
421 // Discard comments in assembly strings.
422 string CommentDelimiter = "#";
424 // Recognize hard coded registers.
425 string RegisterPrefix = "%";
428 def IntelAsmParserVariant : AsmParserVariant {
432 string Name = "intel";
434 // Discard comments in assembly strings.
435 string CommentDelimiter = ";";
437 // Recognize hard coded registers.
438 string RegisterPrefix = "";
441 //===----------------------------------------------------------------------===//
443 //===----------------------------------------------------------------------===//
445 // The X86 target supports two different syntaxes for emitting machine code.
446 // This is controlled by the -x86-asm-syntax={att|intel}
447 def ATTAsmWriter : AsmWriter {
448 string AsmWriterClassName = "ATTInstPrinter";
451 def IntelAsmWriter : AsmWriter {
452 string AsmWriterClassName = "IntelInstPrinter";
457 // Information about the instructions...
458 let InstructionSet = X86InstrInfo;
459 let AssemblyParsers = [ATTAsmParser];
460 let AssemblyParserVariants = [ATTAsmParserVariant, IntelAsmParserVariant];
461 let AssemblyWriters = [ATTAsmWriter, IntelAsmWriter];