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 // FIXME: This is a 16-byte (SSE/AVX) feature; we should rename it to make that
83 // explicit. Also, it seems this would be the default state for most chips
84 // going forward, so it would probably be better to negate the logic and
85 // match the 32-byte "slow mem" feature below.
86 def FeatureFastUAMem : SubtargetFeature<"fast-unaligned-mem",
87 "IsUAMemFast", "true",
88 "Fast unaligned memory access">;
89 def FeatureSlowUAMem32 : SubtargetFeature<"slow-unaligned-mem-32",
90 "IsUAMem32Slow", "true",
91 "Slow unaligned 32-byte memory access">;
92 def FeatureSSE4A : SubtargetFeature<"sse4a", "HasSSE4A", "true",
93 "Support SSE 4a instructions",
96 def FeatureAVX : SubtargetFeature<"avx", "X86SSELevel", "AVX",
97 "Enable AVX instructions",
99 def FeatureAVX2 : SubtargetFeature<"avx2", "X86SSELevel", "AVX2",
100 "Enable AVX2 instructions",
102 def FeatureAVX512 : SubtargetFeature<"avx512f", "X86SSELevel", "AVX512F",
103 "Enable AVX-512 instructions",
105 def FeatureERI : SubtargetFeature<"avx512er", "HasERI", "true",
106 "Enable AVX-512 Exponential and Reciprocal Instructions",
108 def FeatureCDI : SubtargetFeature<"avx512cd", "HasCDI", "true",
109 "Enable AVX-512 Conflict Detection Instructions",
111 def FeaturePFI : SubtargetFeature<"avx512pf", "HasPFI", "true",
112 "Enable AVX-512 PreFetch Instructions",
114 def FeatureDQI : SubtargetFeature<"avx512dq", "HasDQI", "true",
115 "Enable AVX-512 Doubleword and Quadword Instructions",
117 def FeatureBWI : SubtargetFeature<"avx512bw", "HasBWI", "true",
118 "Enable AVX-512 Byte and Word Instructions",
120 def FeatureVLX : SubtargetFeature<"avx512vl", "HasVLX", "true",
121 "Enable AVX-512 Vector Length eXtensions",
123 def FeaturePCLMUL : SubtargetFeature<"pclmul", "HasPCLMUL", "true",
124 "Enable packed carry-less multiplication instructions",
126 def FeatureFMA : SubtargetFeature<"fma", "HasFMA", "true",
127 "Enable three-operand fused multiple-add",
129 def FeatureFMA4 : SubtargetFeature<"fma4", "HasFMA4", "true",
130 "Enable four-operand fused multiple-add",
131 [FeatureAVX, FeatureSSE4A]>;
132 def FeatureXOP : SubtargetFeature<"xop", "HasXOP", "true",
133 "Enable XOP instructions",
135 def FeatureSSEUnalignedMem : SubtargetFeature<"sse-unaligned-mem",
136 "HasSSEUnalignedMem", "true",
137 "Allow unaligned memory operands with SSE instructions">;
138 def FeatureAES : SubtargetFeature<"aes", "HasAES", "true",
139 "Enable AES instructions",
141 def FeatureTBM : SubtargetFeature<"tbm", "HasTBM", "true",
142 "Enable TBM instructions">;
143 def FeatureMOVBE : SubtargetFeature<"movbe", "HasMOVBE", "true",
144 "Support MOVBE instruction">;
145 def FeatureRDRAND : SubtargetFeature<"rdrnd", "HasRDRAND", "true",
146 "Support RDRAND instruction">;
147 def FeatureF16C : SubtargetFeature<"f16c", "HasF16C", "true",
148 "Support 16-bit floating point conversion instructions",
150 def FeatureFSGSBase : SubtargetFeature<"fsgsbase", "HasFSGSBase", "true",
151 "Support FS/GS Base instructions">;
152 def FeatureLZCNT : SubtargetFeature<"lzcnt", "HasLZCNT", "true",
153 "Support LZCNT instruction">;
154 def FeatureBMI : SubtargetFeature<"bmi", "HasBMI", "true",
155 "Support BMI instructions">;
156 def FeatureBMI2 : SubtargetFeature<"bmi2", "HasBMI2", "true",
157 "Support BMI2 instructions">;
158 def FeatureRTM : SubtargetFeature<"rtm", "HasRTM", "true",
159 "Support RTM instructions">;
160 def FeatureHLE : SubtargetFeature<"hle", "HasHLE", "true",
162 def FeatureADX : SubtargetFeature<"adx", "HasADX", "true",
163 "Support ADX instructions">;
164 def FeatureSHA : SubtargetFeature<"sha", "HasSHA", "true",
165 "Enable SHA instructions",
167 def FeaturePRFCHW : SubtargetFeature<"prfchw", "HasPRFCHW", "true",
168 "Support PRFCHW instructions">;
169 def FeatureRDSEED : SubtargetFeature<"rdseed", "HasRDSEED", "true",
170 "Support RDSEED instruction">;
171 def FeatureLeaForSP : SubtargetFeature<"lea-sp", "UseLeaForSP", "true",
172 "Use LEA for adjusting the stack pointer">;
173 def FeatureSlowDivide32 : SubtargetFeature<"idivl-to-divb",
174 "HasSlowDivide32", "true",
175 "Use 8-bit divide for positive values less than 256">;
176 def FeatureSlowDivide64 : SubtargetFeature<"idivq-to-divw",
177 "HasSlowDivide64", "true",
178 "Use 16-bit divide for positive values less than 65536">;
179 def FeaturePadShortFunctions : SubtargetFeature<"pad-short-functions",
180 "PadShortFunctions", "true",
181 "Pad short functions">;
182 def FeatureCallRegIndirect : SubtargetFeature<"call-reg-indirect",
183 "CallRegIndirect", "true",
184 "Call register indirect">;
185 def FeatureLEAUsesAG : SubtargetFeature<"lea-uses-ag", "LEAUsesAG", "true",
186 "LEA instruction needs inputs at AG stage">;
187 def FeatureSlowLEA : SubtargetFeature<"slow-lea", "SlowLEA", "true",
188 "LEA instruction with certain arguments is slow">;
189 def FeatureSlowIncDec : SubtargetFeature<"slow-incdec", "SlowIncDec", "true",
190 "INC and DEC instructions are slower than ADD and SUB">;
191 def FeatureUseSqrtEst : SubtargetFeature<"use-sqrt-est", "UseSqrtEst", "true",
192 "Use RSQRT* to optimize square root calculations">;
193 def FeatureUseRecipEst : SubtargetFeature<"use-recip-est", "UseReciprocalEst",
194 "true", "Use RCP* to optimize division calculations">;
196 : SubtargetFeature<"soft-float", "UseSoftFloat", "true",
197 "Use software floating point features.">;
199 //===----------------------------------------------------------------------===//
200 // X86 processors supported.
201 //===----------------------------------------------------------------------===//
203 include "X86Schedule.td"
205 def ProcIntelAtom : SubtargetFeature<"atom", "X86ProcFamily", "IntelAtom",
206 "Intel Atom processors">;
207 def ProcIntelSLM : SubtargetFeature<"slm", "X86ProcFamily", "IntelSLM",
208 "Intel Silvermont processors">;
210 class Proc<string Name, list<SubtargetFeature> Features>
211 : ProcessorModel<Name, GenericModel, Features>;
213 def : Proc<"generic", []>;
214 def : Proc<"i386", []>;
215 def : Proc<"i486", []>;
216 def : Proc<"i586", []>;
217 def : Proc<"pentium", []>;
218 def : Proc<"pentium-mmx", [FeatureMMX]>;
219 def : Proc<"i686", []>;
220 def : Proc<"pentiumpro", [FeatureCMOV]>;
221 def : Proc<"pentium2", [FeatureMMX, FeatureCMOV]>;
222 def : Proc<"pentium3", [FeatureSSE1]>;
223 def : Proc<"pentium3m", [FeatureSSE1, FeatureSlowBTMem]>;
224 def : Proc<"pentium-m", [FeatureSSE2, FeatureSlowBTMem]>;
225 def : Proc<"pentium4", [FeatureSSE2]>;
226 def : Proc<"pentium4m", [FeatureSSE2, FeatureSlowBTMem]>;
229 def : ProcessorModel<"yonah", SandyBridgeModel,
230 [FeatureSSE3, FeatureSlowBTMem]>;
233 def : Proc<"prescott", [FeatureSSE3, FeatureSlowBTMem]>;
234 def : Proc<"nocona", [FeatureSSE3, FeatureCMPXCHG16B, FeatureSlowBTMem]>;
236 // Intel Core 2 Solo/Duo.
237 def : ProcessorModel<"core2", SandyBridgeModel,
238 [FeatureSSSE3, FeatureCMPXCHG16B, FeatureSlowBTMem]>;
239 def : ProcessorModel<"penryn", SandyBridgeModel,
240 [FeatureSSE41, FeatureCMPXCHG16B, FeatureSlowBTMem]>;
243 class BonnellProc<string Name> : ProcessorModel<Name, AtomModel, [
252 FeatureCallRegIndirect,
254 FeaturePadShortFunctions
256 def : BonnellProc<"bonnell">;
257 def : BonnellProc<"atom">; // Pin the generic name to the baseline.
259 class SilvermontProc<string Name> : ProcessorModel<Name, SLMModel, [
268 FeatureCallRegIndirect,
275 def : SilvermontProc<"silvermont">;
276 def : SilvermontProc<"slm">; // Legacy alias.
278 // "Arrandale" along with corei3 and corei5
279 class NehalemProc<string Name> : ProcessorModel<Name, SandyBridgeModel, [
286 def : NehalemProc<"nehalem">;
287 def : NehalemProc<"corei7">;
289 // Westmere is a similar machine to nehalem with some additional features.
290 // Westmere is the corei3/i5/i7 path from nehalem to sandybridge
291 class WestmereProc<string Name> : ProcessorModel<Name, SandyBridgeModel, [
300 def : WestmereProc<"westmere">;
302 // SSE is not listed here since llvm treats AVX as a reimplementation of SSE,
303 // rather than a superset.
304 class SandyBridgeProc<string Name> : ProcessorModel<Name, SandyBridgeModel, [
313 def : SandyBridgeProc<"sandybridge">;
314 def : SandyBridgeProc<"corei7-avx">; // Legacy alias.
316 class IvyBridgeProc<string Name> : ProcessorModel<Name, SandyBridgeModel, [
328 def : IvyBridgeProc<"ivybridge">;
329 def : IvyBridgeProc<"core-avx-i">; // Legacy alias.
331 class HaswellProc<string Name> : ProcessorModel<Name, HaswellModel, [
350 def : HaswellProc<"haswell">;
351 def : HaswellProc<"core-avx2">; // Legacy alias.
353 class BroadwellProc<string Name> : ProcessorModel<Name, HaswellModel, [
374 def : BroadwellProc<"broadwell">;
376 // FIXME: define KNL model
377 class KnightsLandingProc<string Name> : ProcessorModel<Name, HaswellModel,
378 [FeatureAVX512, FeatureERI, FeatureCDI, FeaturePFI,
379 FeatureCMPXCHG16B, FeatureFastUAMem, FeaturePOPCNT,
380 FeatureAES, FeaturePCLMUL, FeatureRDRAND, FeatureF16C,
381 FeatureFSGSBase, FeatureMOVBE, FeatureLZCNT, FeatureBMI,
382 FeatureBMI2, FeatureFMA, FeatureRTM, FeatureHLE,
384 def : KnightsLandingProc<"knl">;
386 // FIXME: define SKX model
387 class SkylakeProc<string Name> : ProcessorModel<Name, HaswellModel,
388 [FeatureAVX512, FeatureCDI,
389 FeatureDQI, FeatureBWI, FeatureVLX,
390 FeatureCMPXCHG16B, FeatureFastUAMem, FeaturePOPCNT,
391 FeatureAES, FeaturePCLMUL, FeatureRDRAND, FeatureF16C,
392 FeatureFSGSBase, FeatureMOVBE, FeatureLZCNT, FeatureBMI,
393 FeatureBMI2, FeatureFMA, FeatureRTM, FeatureHLE,
395 def : SkylakeProc<"skylake">;
396 def : SkylakeProc<"skx">; // Legacy alias.
401 def : Proc<"k6", [FeatureMMX]>;
402 def : Proc<"k6-2", [Feature3DNow]>;
403 def : Proc<"k6-3", [Feature3DNow]>;
404 def : Proc<"athlon", [Feature3DNowA, FeatureSlowBTMem,
406 def : Proc<"athlon-tbird", [Feature3DNowA, FeatureSlowBTMem,
408 def : Proc<"athlon-4", [FeatureSSE1, Feature3DNowA, FeatureSlowBTMem,
410 def : Proc<"athlon-xp", [FeatureSSE1, Feature3DNowA, FeatureSlowBTMem,
412 def : Proc<"athlon-mp", [FeatureSSE1, Feature3DNowA, FeatureSlowBTMem,
414 def : Proc<"k8", [FeatureSSE2, Feature3DNowA, Feature64Bit,
415 FeatureSlowBTMem, FeatureSlowSHLD]>;
416 def : Proc<"opteron", [FeatureSSE2, Feature3DNowA, Feature64Bit,
417 FeatureSlowBTMem, FeatureSlowSHLD]>;
418 def : Proc<"athlon64", [FeatureSSE2, Feature3DNowA, Feature64Bit,
419 FeatureSlowBTMem, FeatureSlowSHLD]>;
420 def : Proc<"athlon-fx", [FeatureSSE2, Feature3DNowA, Feature64Bit,
421 FeatureSlowBTMem, FeatureSlowSHLD]>;
422 def : Proc<"k8-sse3", [FeatureSSE3, Feature3DNowA, FeatureCMPXCHG16B,
423 FeatureSlowBTMem, FeatureSlowSHLD]>;
424 def : Proc<"opteron-sse3", [FeatureSSE3, Feature3DNowA, FeatureCMPXCHG16B,
425 FeatureSlowBTMem, FeatureSlowSHLD]>;
426 def : Proc<"athlon64-sse3", [FeatureSSE3, Feature3DNowA, FeatureCMPXCHG16B,
427 FeatureSlowBTMem, FeatureSlowSHLD]>;
428 def : Proc<"amdfam10", [FeatureSSE4A,
429 Feature3DNowA, FeatureCMPXCHG16B, FeatureLZCNT,
430 FeaturePOPCNT, FeatureSlowBTMem,
432 def : Proc<"barcelona", [FeatureSSE4A,
433 Feature3DNowA, FeatureCMPXCHG16B, FeatureLZCNT,
434 FeaturePOPCNT, FeatureSlowBTMem,
437 def : Proc<"btver1", [FeatureSSSE3, FeatureSSE4A, FeatureCMPXCHG16B,
438 FeaturePRFCHW, FeatureLZCNT, FeaturePOPCNT,
442 def : ProcessorModel<"btver2", BtVer2Model,
443 [FeatureAVX, FeatureSSE4A, FeatureCMPXCHG16B,
444 FeaturePRFCHW, FeatureAES, FeaturePCLMUL,
445 FeatureBMI, FeatureF16C, FeatureMOVBE,
446 FeatureLZCNT, FeaturePOPCNT, FeatureFastUAMem,
447 FeatureSlowSHLD, FeatureUseSqrtEst, FeatureUseRecipEst]>;
449 // TODO: We should probably add 'FeatureFastUAMem' to all of the AMD chips.
452 def : Proc<"bdver1", [FeatureXOP, FeatureFMA4, FeatureCMPXCHG16B,
453 FeatureAES, FeaturePRFCHW, FeaturePCLMUL,
454 FeatureAVX, FeatureSSE4A, FeatureLZCNT,
455 FeaturePOPCNT, FeatureSlowSHLD]>;
457 def : Proc<"bdver2", [FeatureXOP, FeatureFMA4, FeatureCMPXCHG16B,
458 FeatureAES, FeaturePRFCHW, FeaturePCLMUL,
459 FeatureAVX, FeatureSSE4A, FeatureF16C,
460 FeatureLZCNT, FeaturePOPCNT, FeatureBMI,
461 FeatureTBM, FeatureFMA, FeatureSlowSHLD]>;
464 def : Proc<"bdver3", [FeatureXOP, FeatureFMA4, FeatureCMPXCHG16B,
465 FeatureAES, FeaturePRFCHW, FeaturePCLMUL,
466 FeatureAVX, FeatureSSE4A, FeatureF16C,
467 FeatureLZCNT, FeaturePOPCNT, FeatureBMI,
468 FeatureTBM, FeatureFMA, FeatureSlowSHLD,
472 def : Proc<"bdver4", [FeatureAVX2, FeatureXOP, FeatureFMA4,
473 FeatureCMPXCHG16B, FeatureAES, FeaturePRFCHW,
474 FeaturePCLMUL, FeatureF16C, FeatureLZCNT,
475 FeaturePOPCNT, FeatureBMI, FeatureBMI2,
476 FeatureTBM, FeatureFMA, FeatureSSE4A,
479 def : Proc<"geode", [Feature3DNowA]>;
481 def : Proc<"winchip-c6", [FeatureMMX]>;
482 def : Proc<"winchip2", [Feature3DNow]>;
483 def : Proc<"c3", [Feature3DNow]>;
484 def : Proc<"c3-2", [FeatureSSE1]>;
486 // We also provide a generic 64-bit specific x86 processor model which tries to
487 // be good for modern chips without enabling instruction set encodings past the
488 // basic SSE2 and 64-bit ones. It disables slow things from any mainstream and
489 // modern 64-bit x86 chip, and enables features that are generally beneficial.
491 // We currently use the Sandy Bridge model as the default scheduling model as
492 // we use it across Nehalem, Westmere, Sandy Bridge, and Ivy Bridge which
493 // covers a huge swath of x86 processors. If there are specific scheduling
494 // knobs which need to be tuned differently for AMD chips, we might consider
495 // forming a common base for them.
496 def : ProcessorModel<"x86-64", SandyBridgeModel,
497 [FeatureSSE2, Feature64Bit, FeatureSlowBTMem,
500 //===----------------------------------------------------------------------===//
501 // Register File Description
502 //===----------------------------------------------------------------------===//
504 include "X86RegisterInfo.td"
506 //===----------------------------------------------------------------------===//
507 // Instruction Descriptions
508 //===----------------------------------------------------------------------===//
510 include "X86InstrInfo.td"
512 def X86InstrInfo : InstrInfo;
514 //===----------------------------------------------------------------------===//
515 // Calling Conventions
516 //===----------------------------------------------------------------------===//
518 include "X86CallingConv.td"
521 //===----------------------------------------------------------------------===//
523 //===----------------------------------------------------------------------===//
525 def ATTAsmParser : AsmParser {
526 string AsmParserClassName = "AsmParser";
529 def ATTAsmParserVariant : AsmParserVariant {
535 // Discard comments in assembly strings.
536 string CommentDelimiter = "#";
538 // Recognize hard coded registers.
539 string RegisterPrefix = "%";
542 def IntelAsmParserVariant : AsmParserVariant {
546 string Name = "intel";
548 // Discard comments in assembly strings.
549 string CommentDelimiter = ";";
551 // Recognize hard coded registers.
552 string RegisterPrefix = "";
555 //===----------------------------------------------------------------------===//
557 //===----------------------------------------------------------------------===//
559 // The X86 target supports two different syntaxes for emitting machine code.
560 // This is controlled by the -x86-asm-syntax={att|intel}
561 def ATTAsmWriter : AsmWriter {
562 string AsmWriterClassName = "ATTInstPrinter";
565 def IntelAsmWriter : AsmWriter {
566 string AsmWriterClassName = "IntelInstPrinter";
571 // Information about the instructions...
572 let InstructionSet = X86InstrInfo;
573 let AssemblyParsers = [ATTAsmParser];
574 let AssemblyParserVariants = [ATTAsmParserVariant, IntelAsmParserVariant];
575 let AssemblyWriters = [ATTAsmWriter, IntelAsmWriter];