1 //===-- X86TargetParser - Parser for X86 features ---------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file implements a target parser to recognise X86 hardware features. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "llvm/Support/X86TargetParser.h" 14 #include "llvm/ADT/StringSwitch.h" 15 #include "llvm/ADT/Triple.h" 16 17 using namespace llvm; 18 using namespace llvm::X86; 19 20 namespace { 21 22 /// Container class for CPU features. 23 /// This is a constexpr reimplementation of a subset of std::bitset. It would be 24 /// nice to use std::bitset directly, but it doesn't support constant 25 /// initialization. 26 class FeatureBitset { 27 static constexpr unsigned NUM_FEATURE_WORDS = 28 (X86::CPU_FEATURE_MAX + 31) / 32; 29 30 // This cannot be a std::array, operator[] is not constexpr until C++17. 31 uint32_t Bits[NUM_FEATURE_WORDS] = {}; 32 33 public: 34 constexpr FeatureBitset() = default; 35 constexpr FeatureBitset(std::initializer_list<unsigned> Init) { 36 for (auto I : Init) 37 set(I); 38 } 39 40 bool any() const { 41 return llvm::any_of(Bits, [](uint64_t V) { return V != 0; }); 42 } 43 44 constexpr FeatureBitset &set(unsigned I) { 45 // GCC <6.2 crashes if this is written in a single statement. 46 uint32_t NewBits = Bits[I / 32] | (uint32_t(1) << (I % 32)); 47 Bits[I / 32] = NewBits; 48 return *this; 49 } 50 51 constexpr bool operator[](unsigned I) const { 52 uint32_t Mask = uint32_t(1) << (I % 32); 53 return (Bits[I / 32] & Mask) != 0; 54 } 55 56 constexpr FeatureBitset &operator&=(const FeatureBitset &RHS) { 57 for (unsigned I = 0, E = array_lengthof(Bits); I != E; ++I) { 58 // GCC <6.2 crashes if this is written in a single statement. 59 uint32_t NewBits = Bits[I] & RHS.Bits[I]; 60 Bits[I] = NewBits; 61 } 62 return *this; 63 } 64 65 constexpr FeatureBitset &operator|=(const FeatureBitset &RHS) { 66 for (unsigned I = 0, E = array_lengthof(Bits); I != E; ++I) { 67 // GCC <6.2 crashes if this is written in a single statement. 68 uint32_t NewBits = Bits[I] | RHS.Bits[I]; 69 Bits[I] = NewBits; 70 } 71 return *this; 72 } 73 74 // gcc 5.3 miscompiles this if we try to write this using operator&=. 75 constexpr FeatureBitset operator&(const FeatureBitset &RHS) const { 76 FeatureBitset Result; 77 for (unsigned I = 0, E = array_lengthof(Bits); I != E; ++I) 78 Result.Bits[I] = Bits[I] & RHS.Bits[I]; 79 return Result; 80 } 81 82 // gcc 5.3 miscompiles this if we try to write this using operator&=. 83 constexpr FeatureBitset operator|(const FeatureBitset &RHS) const { 84 FeatureBitset Result; 85 for (unsigned I = 0, E = array_lengthof(Bits); I != E; ++I) 86 Result.Bits[I] = Bits[I] | RHS.Bits[I]; 87 return Result; 88 } 89 90 constexpr FeatureBitset operator~() const { 91 FeatureBitset Result; 92 for (unsigned I = 0, E = array_lengthof(Bits); I != E; ++I) 93 Result.Bits[I] = ~Bits[I]; 94 return Result; 95 } 96 97 constexpr bool operator!=(const FeatureBitset &RHS) const { 98 for (unsigned I = 0, E = array_lengthof(Bits); I != E; ++I) 99 if (Bits[I] != RHS.Bits[I]) 100 return true; 101 return false; 102 } 103 }; 104 105 struct ProcInfo { 106 StringLiteral Name; 107 X86::CPUKind Kind; 108 unsigned KeyFeature; 109 FeatureBitset Features; 110 }; 111 112 struct FeatureInfo { 113 StringLiteral Name; 114 FeatureBitset ImpliedFeatures; 115 }; 116 117 } // end anonymous namespace 118 119 #define X86_FEATURE(ENUM, STRING) \ 120 constexpr FeatureBitset Feature##ENUM = {X86::FEATURE_##ENUM}; 121 #include "llvm/Support/X86TargetParser.def" 122 123 // Pentium with MMX. 124 constexpr FeatureBitset FeaturesPentiumMMX = 125 FeatureX87 | FeatureCMPXCHG8B | FeatureMMX; 126 127 // Pentium 2 and 3. 128 constexpr FeatureBitset FeaturesPentium2 = 129 FeatureX87 | FeatureCMPXCHG8B | FeatureMMX | FeatureFXSR; 130 constexpr FeatureBitset FeaturesPentium3 = FeaturesPentium2 | FeatureSSE; 131 132 // Pentium 4 CPUs 133 constexpr FeatureBitset FeaturesPentium4 = FeaturesPentium3 | FeatureSSE2; 134 constexpr FeatureBitset FeaturesPrescott = FeaturesPentium4 | FeatureSSE3; 135 constexpr FeatureBitset FeaturesNocona = 136 FeaturesPrescott | Feature64BIT | FeatureCMPXCHG16B; 137 138 // Basic 64-bit capable CPU. 139 constexpr FeatureBitset FeaturesX86_64 = FeaturesPentium4 | Feature64BIT; 140 constexpr FeatureBitset FeaturesX86_64_V2 = FeaturesX86_64 | FeatureSAHF | 141 FeaturePOPCNT | FeatureSSE4_2 | 142 FeatureCMPXCHG16B; 143 constexpr FeatureBitset FeaturesX86_64_V3 = 144 FeaturesX86_64_V2 | FeatureAVX2 | FeatureBMI | FeatureBMI2 | FeatureF16C | 145 FeatureFMA | FeatureLZCNT | FeatureMOVBE | FeatureXSAVE; 146 constexpr FeatureBitset FeaturesX86_64_V4 = FeaturesX86_64_V3 | 147 FeatureAVX512BW | FeatureAVX512CD | 148 FeatureAVX512DQ | FeatureAVX512VL; 149 150 // Intel Core CPUs 151 constexpr FeatureBitset FeaturesCore2 = 152 FeaturesNocona | FeatureSAHF | FeatureSSSE3; 153 constexpr FeatureBitset FeaturesPenryn = FeaturesCore2 | FeatureSSE4_1; 154 constexpr FeatureBitset FeaturesNehalem = 155 FeaturesPenryn | FeaturePOPCNT | FeatureSSE4_2; 156 constexpr FeatureBitset FeaturesWestmere = FeaturesNehalem | FeaturePCLMUL; 157 constexpr FeatureBitset FeaturesSandyBridge = 158 FeaturesWestmere | FeatureAVX | FeatureXSAVE | FeatureXSAVEOPT; 159 constexpr FeatureBitset FeaturesIvyBridge = 160 FeaturesSandyBridge | FeatureF16C | FeatureFSGSBASE | FeatureRDRND; 161 constexpr FeatureBitset FeaturesHaswell = 162 FeaturesIvyBridge | FeatureAVX2 | FeatureBMI | FeatureBMI2 | FeatureFMA | 163 FeatureINVPCID | FeatureLZCNT | FeatureMOVBE; 164 constexpr FeatureBitset FeaturesBroadwell = 165 FeaturesHaswell | FeatureADX | FeaturePRFCHW | FeatureRDSEED; 166 167 // Intel Knights Landing and Knights Mill 168 // Knights Landing has feature parity with Broadwell. 169 constexpr FeatureBitset FeaturesKNL = 170 FeaturesBroadwell | FeatureAES | FeatureAVX512F | FeatureAVX512CD | 171 FeatureAVX512ER | FeatureAVX512PF | FeaturePREFETCHWT1; 172 constexpr FeatureBitset FeaturesKNM = FeaturesKNL | FeatureAVX512VPOPCNTDQ; 173 174 // Intel Skylake processors. 175 constexpr FeatureBitset FeaturesSkylakeClient = 176 FeaturesBroadwell | FeatureAES | FeatureCLFLUSHOPT | FeatureXSAVEC | 177 FeatureXSAVES | FeatureSGX; 178 // SkylakeServer inherits all SkylakeClient features except SGX. 179 // FIXME: That doesn't match gcc. 180 constexpr FeatureBitset FeaturesSkylakeServer = 181 (FeaturesSkylakeClient & ~FeatureSGX) | FeatureAVX512F | FeatureAVX512CD | 182 FeatureAVX512DQ | FeatureAVX512BW | FeatureAVX512VL | FeatureCLWB | 183 FeaturePKU; 184 constexpr FeatureBitset FeaturesCascadeLake = 185 FeaturesSkylakeServer | FeatureAVX512VNNI; 186 constexpr FeatureBitset FeaturesCooperLake = 187 FeaturesCascadeLake | FeatureAVX512BF16; 188 189 // Intel 10nm processors. 190 constexpr FeatureBitset FeaturesCannonlake = 191 FeaturesSkylakeClient | FeatureAVX512F | FeatureAVX512CD | FeatureAVX512DQ | 192 FeatureAVX512BW | FeatureAVX512VL | FeatureAVX512IFMA | FeatureAVX512VBMI | 193 FeaturePKU | FeatureSHA; 194 constexpr FeatureBitset FeaturesICLClient = 195 FeaturesCannonlake | FeatureAVX512BITALG | FeatureAVX512VBMI2 | 196 FeatureAVX512VNNI | FeatureAVX512VPOPCNTDQ | FeatureCLWB | FeatureGFNI | 197 FeatureRDPID | FeatureVAES | FeatureVPCLMULQDQ; 198 constexpr FeatureBitset FeaturesICLServer = 199 FeaturesICLClient | FeaturePCONFIG | FeatureWBNOINVD; 200 constexpr FeatureBitset FeaturesTigerlake = 201 FeaturesICLClient | FeatureAVX512VP2INTERSECT | FeatureMOVDIR64B | 202 FeatureMOVDIRI | FeatureSHSTK | FeatureKL | FeatureWIDEKL; 203 constexpr FeatureBitset FeaturesSapphireRapids = 204 FeaturesICLServer | FeatureAMX_TILE | FeatureAMX_INT8 | FeatureAMX_BF16 | 205 FeatureAVX512BF16 | FeatureAVX512VP2INTERSECT | FeatureCLDEMOTE | 206 FeatureENQCMD | FeatureMOVDIR64B | FeatureMOVDIRI | FeaturePTWRITE | 207 FeatureSERIALIZE | FeatureSHSTK | FeatureTSXLDTRK | FeatureWAITPKG; 208 209 // Intel Atom processors. 210 // Bonnell has feature parity with Core2 and adds MOVBE. 211 constexpr FeatureBitset FeaturesBonnell = FeaturesCore2 | FeatureMOVBE; 212 // Silvermont has parity with Westmere and Bonnell plus PRFCHW and RDRND. 213 constexpr FeatureBitset FeaturesSilvermont = 214 FeaturesBonnell | FeaturesWestmere | FeaturePRFCHW | FeatureRDRND; 215 constexpr FeatureBitset FeaturesGoldmont = 216 FeaturesSilvermont | FeatureAES | FeatureCLFLUSHOPT | FeatureFSGSBASE | 217 FeatureRDSEED | FeatureSHA | FeatureXSAVE | FeatureXSAVEC | 218 FeatureXSAVEOPT | FeatureXSAVES; 219 constexpr FeatureBitset FeaturesGoldmontPlus = 220 FeaturesGoldmont | FeaturePTWRITE | FeatureRDPID | FeatureSGX; 221 constexpr FeatureBitset FeaturesTremont = 222 FeaturesGoldmontPlus | FeatureCLWB | FeatureGFNI; 223 224 // Geode Processor. 225 constexpr FeatureBitset FeaturesGeode = 226 FeatureX87 | FeatureCMPXCHG8B | FeatureMMX | Feature3DNOW | Feature3DNOWA; 227 228 // K6 processor. 229 constexpr FeatureBitset FeaturesK6 = FeatureX87 | FeatureCMPXCHG8B | FeatureMMX; 230 231 // K7 and K8 architecture processors. 232 constexpr FeatureBitset FeaturesAthlon = 233 FeatureX87 | FeatureCMPXCHG8B | FeatureMMX | Feature3DNOW | Feature3DNOWA; 234 constexpr FeatureBitset FeaturesAthlonXP = 235 FeaturesAthlon | FeatureFXSR | FeatureSSE; 236 constexpr FeatureBitset FeaturesK8 = 237 FeaturesAthlonXP | FeatureSSE2 | Feature64BIT; 238 constexpr FeatureBitset FeaturesK8SSE3 = FeaturesK8 | FeatureSSE3; 239 constexpr FeatureBitset FeaturesAMDFAM10 = 240 FeaturesK8SSE3 | FeatureCMPXCHG16B | FeatureLZCNT | FeaturePOPCNT | 241 FeaturePRFCHW | FeatureSAHF | FeatureSSE4_A; 242 243 // Bobcat architecture processors. 244 constexpr FeatureBitset FeaturesBTVER1 = 245 FeatureX87 | FeatureCMPXCHG8B | FeatureCMPXCHG16B | Feature64BIT | 246 FeatureFXSR | FeatureLZCNT | FeatureMMX | FeaturePOPCNT | FeaturePRFCHW | 247 FeatureSSE | FeatureSSE2 | FeatureSSE3 | FeatureSSSE3 | FeatureSSE4_A | 248 FeatureSAHF; 249 constexpr FeatureBitset FeaturesBTVER2 = 250 FeaturesBTVER1 | FeatureAES | FeatureAVX | FeatureBMI | FeatureF16C | 251 FeatureMOVBE | FeaturePCLMUL | FeatureXSAVE | FeatureXSAVEOPT; 252 253 // AMD Bulldozer architecture processors. 254 constexpr FeatureBitset FeaturesBDVER1 = 255 FeatureX87 | FeatureAES | FeatureAVX | FeatureCMPXCHG8B | 256 FeatureCMPXCHG16B | Feature64BIT | FeatureFMA4 | FeatureFXSR | FeatureLWP | 257 FeatureLZCNT | FeatureMMX | FeaturePCLMUL | FeaturePOPCNT | FeaturePRFCHW | 258 FeatureSAHF | FeatureSSE | FeatureSSE2 | FeatureSSE3 | FeatureSSSE3 | 259 FeatureSSE4_1 | FeatureSSE4_2 | FeatureSSE4_A | FeatureXOP | FeatureXSAVE; 260 constexpr FeatureBitset FeaturesBDVER2 = 261 FeaturesBDVER1 | FeatureBMI | FeatureFMA | FeatureF16C | FeatureTBM; 262 constexpr FeatureBitset FeaturesBDVER3 = 263 FeaturesBDVER2 | FeatureFSGSBASE | FeatureXSAVEOPT; 264 constexpr FeatureBitset FeaturesBDVER4 = FeaturesBDVER3 | FeatureAVX2 | 265 FeatureBMI2 | FeatureMOVBE | 266 FeatureMWAITX | FeatureRDRND; 267 268 // AMD Zen architecture processors. 269 constexpr FeatureBitset FeaturesZNVER1 = 270 FeatureX87 | FeatureADX | FeatureAES | FeatureAVX | FeatureAVX2 | 271 FeatureBMI | FeatureBMI2 | FeatureCLFLUSHOPT | FeatureCLZERO | 272 FeatureCMPXCHG8B | FeatureCMPXCHG16B | Feature64BIT | FeatureF16C | 273 FeatureFMA | FeatureFSGSBASE | FeatureFXSR | FeatureLZCNT | FeatureMMX | 274 FeatureMOVBE | FeatureMWAITX | FeaturePCLMUL | FeaturePOPCNT | 275 FeaturePRFCHW | FeatureRDRND | FeatureRDSEED | FeatureSAHF | FeatureSHA | 276 FeatureSSE | FeatureSSE2 | FeatureSSE3 | FeatureSSSE3 | FeatureSSE4_1 | 277 FeatureSSE4_2 | FeatureSSE4_A | FeatureXSAVE | FeatureXSAVEC | 278 FeatureXSAVEOPT | FeatureXSAVES; 279 constexpr FeatureBitset FeaturesZNVER2 = 280 FeaturesZNVER1 | FeatureCLWB | FeatureRDPID | FeatureWBNOINVD; 281 282 constexpr ProcInfo Processors[] = { 283 // Empty processor. Include X87 and CMPXCHG8 for backwards compatibility. 284 { {""}, CK_None, ~0U, FeatureX87 | FeatureCMPXCHG8B }, 285 // i386-generation processors. 286 { {"i386"}, CK_i386, ~0U, FeatureX87 }, 287 // i486-generation processors. 288 { {"i486"}, CK_i486, ~0U, FeatureX87 }, 289 { {"winchip-c6"}, CK_WinChipC6, ~0U, FeaturesPentiumMMX }, 290 { {"winchip2"}, CK_WinChip2, ~0U, FeaturesPentiumMMX | Feature3DNOW }, 291 { {"c3"}, CK_C3, ~0U, FeaturesPentiumMMX | Feature3DNOW }, 292 // i586-generation processors, P5 microarchitecture based. 293 { {"i586"}, CK_i586, ~0U, FeatureX87 | FeatureCMPXCHG8B }, 294 { {"pentium"}, CK_Pentium, ~0U, FeatureX87 | FeatureCMPXCHG8B }, 295 { {"pentium-mmx"}, CK_PentiumMMX, ~0U, FeaturesPentiumMMX }, 296 // i686-generation processors, P6 / Pentium M microarchitecture based. 297 { {"pentiumpro"}, CK_PentiumPro, ~0U, FeatureX87 | FeatureCMPXCHG8B }, 298 { {"i686"}, CK_i686, ~0U, FeatureX87 | FeatureCMPXCHG8B }, 299 { {"pentium2"}, CK_Pentium2, ~0U, FeaturesPentium2 }, 300 { {"pentium3"}, CK_Pentium3, ~0U, FeaturesPentium3 }, 301 { {"pentium3m"}, CK_Pentium3, ~0U, FeaturesPentium3 }, 302 { {"pentium-m"}, CK_PentiumM, ~0U, FeaturesPentium4 }, 303 { {"c3-2"}, CK_C3_2, ~0U, FeaturesPentium3 }, 304 { {"yonah"}, CK_Yonah, ~0U, FeaturesPrescott }, 305 // Netburst microarchitecture based processors. 306 { {"pentium4"}, CK_Pentium4, ~0U, FeaturesPentium4 }, 307 { {"pentium4m"}, CK_Pentium4, ~0U, FeaturesPentium4 }, 308 { {"prescott"}, CK_Prescott, ~0U, FeaturesPrescott }, 309 { {"nocona"}, CK_Nocona, ~0U, FeaturesNocona }, 310 // Core microarchitecture based processors. 311 { {"core2"}, CK_Core2, ~0U, FeaturesCore2 }, 312 { {"penryn"}, CK_Penryn, ~0U, FeaturesPenryn }, 313 // Atom processors 314 { {"bonnell"}, CK_Bonnell, FEATURE_SSSE3, FeaturesBonnell }, 315 { {"atom"}, CK_Bonnell, FEATURE_SSSE3, FeaturesBonnell }, 316 { {"silvermont"}, CK_Silvermont, FEATURE_SSE4_2, FeaturesSilvermont }, 317 { {"slm"}, CK_Silvermont, FEATURE_SSE4_2, FeaturesSilvermont }, 318 { {"goldmont"}, CK_Goldmont, FEATURE_SSE4_2, FeaturesGoldmont }, 319 { {"goldmont-plus"}, CK_GoldmontPlus, FEATURE_SSE4_2, FeaturesGoldmontPlus }, 320 { {"tremont"}, CK_Tremont, FEATURE_SSE4_2, FeaturesTremont }, 321 // Nehalem microarchitecture based processors. 322 { {"nehalem"}, CK_Nehalem, FEATURE_SSE4_2, FeaturesNehalem }, 323 { {"corei7"}, CK_Nehalem, FEATURE_SSE4_2, FeaturesNehalem }, 324 // Westmere microarchitecture based processors. 325 { {"westmere"}, CK_Westmere, FEATURE_PCLMUL, FeaturesWestmere }, 326 // Sandy Bridge microarchitecture based processors. 327 { {"sandybridge"}, CK_SandyBridge, FEATURE_AVX, FeaturesSandyBridge }, 328 { {"corei7-avx"}, CK_SandyBridge, FEATURE_AVX, FeaturesSandyBridge }, 329 // Ivy Bridge microarchitecture based processors. 330 { {"ivybridge"}, CK_IvyBridge, FEATURE_AVX, FeaturesIvyBridge }, 331 { {"core-avx-i"}, CK_IvyBridge, FEATURE_AVX, FeaturesIvyBridge }, 332 // Haswell microarchitecture based processors. 333 { {"haswell"}, CK_Haswell, FEATURE_AVX2, FeaturesHaswell }, 334 { {"core-avx2"}, CK_Haswell, FEATURE_AVX2, FeaturesHaswell }, 335 // Broadwell microarchitecture based processors. 336 { {"broadwell"}, CK_Broadwell, FEATURE_AVX2, FeaturesBroadwell }, 337 // Skylake client microarchitecture based processors. 338 { {"skylake"}, CK_SkylakeClient, FEATURE_AVX2, FeaturesSkylakeClient }, 339 // Skylake server microarchitecture based processors. 340 { {"skylake-avx512"}, CK_SkylakeServer, FEATURE_AVX512F, FeaturesSkylakeServer }, 341 { {"skx"}, CK_SkylakeServer, FEATURE_AVX512F, FeaturesSkylakeServer }, 342 // Cascadelake Server microarchitecture based processors. 343 { {"cascadelake"}, CK_Cascadelake, FEATURE_AVX512VNNI, FeaturesCascadeLake }, 344 // Cooperlake Server microarchitecture based processors. 345 { {"cooperlake"}, CK_Cooperlake, FEATURE_AVX512BF16, FeaturesCooperLake }, 346 // Cannonlake client microarchitecture based processors. 347 { {"cannonlake"}, CK_Cannonlake, FEATURE_AVX512VBMI, FeaturesCannonlake }, 348 // Icelake client microarchitecture based processors. 349 { {"icelake-client"}, CK_IcelakeClient, FEATURE_AVX512VBMI2, FeaturesICLClient }, 350 // Icelake server microarchitecture based processors. 351 { {"icelake-server"}, CK_IcelakeServer, FEATURE_AVX512VBMI2, FeaturesICLServer }, 352 // Tigerlake microarchitecture based processors. 353 { {"tigerlake"}, CK_Tigerlake, FEATURE_AVX512VP2INTERSECT, FeaturesTigerlake }, 354 // Sapphire Rapids microarchitecture based processors. 355 { {"sapphirerapids"}, CK_SapphireRapids, FEATURE_AVX512VP2INTERSECT, FeaturesSapphireRapids }, 356 // Knights Landing processor. 357 { {"knl"}, CK_KNL, FEATURE_AVX512F, FeaturesKNL }, 358 // Knights Mill processor. 359 { {"knm"}, CK_KNM, FEATURE_AVX5124FMAPS, FeaturesKNM }, 360 // Lakemont microarchitecture based processors. 361 { {"lakemont"}, CK_Lakemont, ~0U, FeatureCMPXCHG8B }, 362 // K6 architecture processors. 363 { {"k6"}, CK_K6, ~0U, FeaturesK6 }, 364 { {"k6-2"}, CK_K6_2, ~0U, FeaturesK6 | Feature3DNOW }, 365 { {"k6-3"}, CK_K6_3, ~0U, FeaturesK6 | Feature3DNOW }, 366 // K7 architecture processors. 367 { {"athlon"}, CK_Athlon, ~0U, FeaturesAthlon }, 368 { {"athlon-tbird"}, CK_Athlon, ~0U, FeaturesAthlon }, 369 { {"athlon-xp"}, CK_AthlonXP, ~0U, FeaturesAthlonXP }, 370 { {"athlon-mp"}, CK_AthlonXP, ~0U, FeaturesAthlonXP }, 371 { {"athlon-4"}, CK_AthlonXP, ~0U, FeaturesAthlonXP }, 372 // K8 architecture processors. 373 { {"k8"}, CK_K8, ~0U, FeaturesK8 }, 374 { {"athlon64"}, CK_K8, ~0U, FeaturesK8 }, 375 { {"athlon-fx"}, CK_K8, ~0U, FeaturesK8 }, 376 { {"opteron"}, CK_K8, ~0U, FeaturesK8 }, 377 { {"k8-sse3"}, CK_K8SSE3, ~0U, FeaturesK8SSE3 }, 378 { {"athlon64-sse3"}, CK_K8SSE3, ~0U, FeaturesK8SSE3 }, 379 { {"opteron-sse3"}, CK_K8SSE3, ~0U, FeaturesK8SSE3 }, 380 { {"amdfam10"}, CK_AMDFAM10, FEATURE_SSE4_A, FeaturesAMDFAM10 }, 381 { {"barcelona"}, CK_AMDFAM10, FEATURE_SSE4_A, FeaturesAMDFAM10 }, 382 // Bobcat architecture processors. 383 { {"btver1"}, CK_BTVER1, FEATURE_SSE4_A, FeaturesBTVER1 }, 384 { {"btver2"}, CK_BTVER2, FEATURE_BMI, FeaturesBTVER2 }, 385 // Bulldozer architecture processors. 386 { {"bdver1"}, CK_BDVER1, FEATURE_XOP, FeaturesBDVER1 }, 387 { {"bdver2"}, CK_BDVER2, FEATURE_FMA, FeaturesBDVER2 }, 388 { {"bdver3"}, CK_BDVER3, FEATURE_FMA, FeaturesBDVER3 }, 389 { {"bdver4"}, CK_BDVER4, FEATURE_AVX2, FeaturesBDVER4 }, 390 // Zen architecture processors. 391 { {"znver1"}, CK_ZNVER1, FEATURE_AVX2, FeaturesZNVER1 }, 392 { {"znver2"}, CK_ZNVER2, FEATURE_AVX2, FeaturesZNVER2 }, 393 // Generic 64-bit processor. 394 { {"x86-64"}, CK_x86_64, ~0U, FeaturesX86_64 }, 395 { {"x86-64-v2"}, CK_x86_64_v2, ~0U, FeaturesX86_64_V2 }, 396 { {"x86-64-v3"}, CK_x86_64_v3, ~0U, FeaturesX86_64_V3 }, 397 { {"x86-64-v4"}, CK_x86_64_v4, ~0U, FeaturesX86_64_V4 }, 398 // Geode processors. 399 { {"geode"}, CK_Geode, ~0U, FeaturesGeode }, 400 }; 401 402 constexpr const char *NoTuneList[] = {"x86-64-v2", "x86-64-v3", "x86-64-v4"}; 403 404 X86::CPUKind llvm::X86::parseArchX86(StringRef CPU, bool Only64Bit) { 405 for (const auto &P : Processors) 406 if (P.Name == CPU && (P.Features[FEATURE_64BIT] || !Only64Bit)) 407 return P.Kind; 408 409 return CK_None; 410 } 411 412 X86::CPUKind llvm::X86::parseTuneCPU(StringRef CPU, bool Only64Bit) { 413 if (llvm::is_contained(NoTuneList, CPU)) 414 return CK_None; 415 return parseArchX86(CPU, Only64Bit); 416 } 417 418 void llvm::X86::fillValidCPUArchList(SmallVectorImpl<StringRef> &Values, 419 bool Only64Bit) { 420 for (const auto &P : Processors) 421 if (!P.Name.empty() && (P.Features[FEATURE_64BIT] || !Only64Bit)) 422 Values.emplace_back(P.Name); 423 } 424 425 void llvm::X86::fillValidTuneCPUList(SmallVectorImpl<StringRef> &Values, 426 bool Only64Bit) { 427 for (const ProcInfo &P : Processors) 428 if (!P.Name.empty() && (P.Features[FEATURE_64BIT] || !Only64Bit) && 429 !llvm::is_contained(NoTuneList, P.Name)) 430 Values.emplace_back(P.Name); 431 } 432 433 ProcessorFeatures llvm::X86::getKeyFeature(X86::CPUKind Kind) { 434 // FIXME: Can we avoid a linear search here? The table might be sorted by 435 // CPUKind so we could binary search? 436 for (const auto &P : Processors) { 437 if (P.Kind == Kind) { 438 assert(P.KeyFeature != ~0U && "Processor does not have a key feature."); 439 return static_cast<ProcessorFeatures>(P.KeyFeature); 440 } 441 } 442 443 llvm_unreachable("Unable to find CPU kind!"); 444 } 445 446 // Features with no dependencies. 447 constexpr FeatureBitset ImpliedFeatures64BIT = {}; 448 constexpr FeatureBitset ImpliedFeaturesADX = {}; 449 constexpr FeatureBitset ImpliedFeaturesBMI = {}; 450 constexpr FeatureBitset ImpliedFeaturesBMI2 = {}; 451 constexpr FeatureBitset ImpliedFeaturesCLDEMOTE = {}; 452 constexpr FeatureBitset ImpliedFeaturesCLFLUSHOPT = {}; 453 constexpr FeatureBitset ImpliedFeaturesCLWB = {}; 454 constexpr FeatureBitset ImpliedFeaturesCLZERO = {}; 455 constexpr FeatureBitset ImpliedFeaturesCMOV = {}; 456 constexpr FeatureBitset ImpliedFeaturesCMPXCHG16B = {}; 457 constexpr FeatureBitset ImpliedFeaturesCMPXCHG8B = {}; 458 constexpr FeatureBitset ImpliedFeaturesENQCMD = {}; 459 constexpr FeatureBitset ImpliedFeaturesFSGSBASE = {}; 460 constexpr FeatureBitset ImpliedFeaturesFXSR = {}; 461 constexpr FeatureBitset ImpliedFeaturesINVPCID = {}; 462 constexpr FeatureBitset ImpliedFeaturesLWP = {}; 463 constexpr FeatureBitset ImpliedFeaturesLZCNT = {}; 464 constexpr FeatureBitset ImpliedFeaturesMWAITX = {}; 465 constexpr FeatureBitset ImpliedFeaturesMOVBE = {}; 466 constexpr FeatureBitset ImpliedFeaturesMOVDIR64B = {}; 467 constexpr FeatureBitset ImpliedFeaturesMOVDIRI = {}; 468 constexpr FeatureBitset ImpliedFeaturesPCONFIG = {}; 469 constexpr FeatureBitset ImpliedFeaturesPOPCNT = {}; 470 constexpr FeatureBitset ImpliedFeaturesPKU = {}; 471 constexpr FeatureBitset ImpliedFeaturesPREFETCHWT1 = {}; 472 constexpr FeatureBitset ImpliedFeaturesPRFCHW = {}; 473 constexpr FeatureBitset ImpliedFeaturesPTWRITE = {}; 474 constexpr FeatureBitset ImpliedFeaturesRDPID = {}; 475 constexpr FeatureBitset ImpliedFeaturesRDRND = {}; 476 constexpr FeatureBitset ImpliedFeaturesRDSEED = {}; 477 constexpr FeatureBitset ImpliedFeaturesRTM = {}; 478 constexpr FeatureBitset ImpliedFeaturesSAHF = {}; 479 constexpr FeatureBitset ImpliedFeaturesSERIALIZE = {}; 480 constexpr FeatureBitset ImpliedFeaturesSGX = {}; 481 constexpr FeatureBitset ImpliedFeaturesSHSTK = {}; 482 constexpr FeatureBitset ImpliedFeaturesTBM = {}; 483 constexpr FeatureBitset ImpliedFeaturesTSXLDTRK = {}; 484 constexpr FeatureBitset ImpliedFeaturesWAITPKG = {}; 485 constexpr FeatureBitset ImpliedFeaturesWBNOINVD = {}; 486 constexpr FeatureBitset ImpliedFeaturesVZEROUPPER = {}; 487 constexpr FeatureBitset ImpliedFeaturesX87 = {}; 488 constexpr FeatureBitset ImpliedFeaturesXSAVE = {}; 489 490 // Not really CPU features, but need to be in the table because clang uses 491 // target features to communicate them to the backend. 492 constexpr FeatureBitset ImpliedFeaturesRETPOLINE_EXTERNAL_THUNK = {}; 493 constexpr FeatureBitset ImpliedFeaturesRETPOLINE_INDIRECT_BRANCHES = {}; 494 constexpr FeatureBitset ImpliedFeaturesRETPOLINE_INDIRECT_CALLS = {}; 495 constexpr FeatureBitset ImpliedFeaturesLVI_CFI = {}; 496 constexpr FeatureBitset ImpliedFeaturesLVI_LOAD_HARDENING = {}; 497 498 // XSAVE features are dependent on basic XSAVE. 499 constexpr FeatureBitset ImpliedFeaturesXSAVEC = FeatureXSAVE; 500 constexpr FeatureBitset ImpliedFeaturesXSAVEOPT = FeatureXSAVE; 501 constexpr FeatureBitset ImpliedFeaturesXSAVES = FeatureXSAVE; 502 503 // MMX->3DNOW->3DNOWA chain. 504 constexpr FeatureBitset ImpliedFeaturesMMX = {}; 505 constexpr FeatureBitset ImpliedFeatures3DNOW = FeatureMMX; 506 constexpr FeatureBitset ImpliedFeatures3DNOWA = Feature3DNOW; 507 508 // SSE/AVX/AVX512F chain. 509 constexpr FeatureBitset ImpliedFeaturesSSE = {}; 510 constexpr FeatureBitset ImpliedFeaturesSSE2 = FeatureSSE; 511 constexpr FeatureBitset ImpliedFeaturesSSE3 = FeatureSSE2; 512 constexpr FeatureBitset ImpliedFeaturesSSSE3 = FeatureSSE3; 513 constexpr FeatureBitset ImpliedFeaturesSSE4_1 = FeatureSSSE3; 514 constexpr FeatureBitset ImpliedFeaturesSSE4_2 = FeatureSSE4_1; 515 constexpr FeatureBitset ImpliedFeaturesAVX = FeatureSSE4_2; 516 constexpr FeatureBitset ImpliedFeaturesAVX2 = FeatureAVX; 517 constexpr FeatureBitset ImpliedFeaturesAVX512F = 518 FeatureAVX2 | FeatureF16C | FeatureFMA; 519 520 // Vector extensions that build on SSE or AVX. 521 constexpr FeatureBitset ImpliedFeaturesAES = FeatureSSE2; 522 constexpr FeatureBitset ImpliedFeaturesF16C = FeatureAVX; 523 constexpr FeatureBitset ImpliedFeaturesFMA = FeatureAVX; 524 constexpr FeatureBitset ImpliedFeaturesGFNI = FeatureSSE2; 525 constexpr FeatureBitset ImpliedFeaturesPCLMUL = FeatureSSE2; 526 constexpr FeatureBitset ImpliedFeaturesSHA = FeatureSSE2; 527 constexpr FeatureBitset ImpliedFeaturesVAES = FeatureAES | FeatureAVX; 528 constexpr FeatureBitset ImpliedFeaturesVPCLMULQDQ = FeatureAVX | FeaturePCLMUL; 529 530 // AVX512 features. 531 constexpr FeatureBitset ImpliedFeaturesAVX512CD = FeatureAVX512F; 532 constexpr FeatureBitset ImpliedFeaturesAVX512BW = FeatureAVX512F; 533 constexpr FeatureBitset ImpliedFeaturesAVX512DQ = FeatureAVX512F; 534 constexpr FeatureBitset ImpliedFeaturesAVX512ER = FeatureAVX512F; 535 constexpr FeatureBitset ImpliedFeaturesAVX512PF = FeatureAVX512F; 536 constexpr FeatureBitset ImpliedFeaturesAVX512VL = FeatureAVX512F; 537 538 constexpr FeatureBitset ImpliedFeaturesAVX512BF16 = FeatureAVX512BW; 539 constexpr FeatureBitset ImpliedFeaturesAVX512BITALG = FeatureAVX512BW; 540 constexpr FeatureBitset ImpliedFeaturesAVX512IFMA = FeatureAVX512F; 541 constexpr FeatureBitset ImpliedFeaturesAVX512VNNI = FeatureAVX512F; 542 constexpr FeatureBitset ImpliedFeaturesAVX512VPOPCNTDQ = FeatureAVX512F; 543 constexpr FeatureBitset ImpliedFeaturesAVX512VBMI = FeatureAVX512BW; 544 constexpr FeatureBitset ImpliedFeaturesAVX512VBMI2 = FeatureAVX512BW; 545 constexpr FeatureBitset ImpliedFeaturesAVX512VP2INTERSECT = FeatureAVX512F; 546 547 // FIXME: These two aren't really implemented and just exist in the feature 548 // list for __builtin_cpu_supports. So omit their dependencies. 549 constexpr FeatureBitset ImpliedFeaturesAVX5124FMAPS = {}; 550 constexpr FeatureBitset ImpliedFeaturesAVX5124VNNIW = {}; 551 552 // SSE4_A->FMA4->XOP chain. 553 constexpr FeatureBitset ImpliedFeaturesSSE4_A = FeatureSSE3; 554 constexpr FeatureBitset ImpliedFeaturesFMA4 = FeatureAVX | FeatureSSE4_A; 555 constexpr FeatureBitset ImpliedFeaturesXOP = FeatureFMA4; 556 557 // AMX Features 558 constexpr FeatureBitset ImpliedFeaturesAMX_TILE = {}; 559 constexpr FeatureBitset ImpliedFeaturesAMX_BF16 = FeatureAMX_TILE; 560 constexpr FeatureBitset ImpliedFeaturesAMX_INT8 = FeatureAMX_TILE; 561 constexpr FeatureBitset ImpliedFeaturesHRESET = {}; 562 563 // Key Locker Features 564 constexpr FeatureBitset ImpliedFeaturesKL = FeatureSSE2; 565 constexpr FeatureBitset ImpliedFeaturesWIDEKL = FeatureKL; 566 567 constexpr FeatureInfo FeatureInfos[X86::CPU_FEATURE_MAX] = { 568 #define X86_FEATURE(ENUM, STR) {{STR}, ImpliedFeatures##ENUM}, 569 #include "llvm/Support/X86TargetParser.def" 570 }; 571 572 void llvm::X86::getFeaturesForCPU(StringRef CPU, 573 SmallVectorImpl<StringRef> &EnabledFeatures) { 574 auto I = llvm::find_if(Processors, 575 [&](const ProcInfo &P) { return P.Name == CPU; }); 576 assert(I != std::end(Processors) && "Processor not found!"); 577 578 FeatureBitset Bits = I->Features; 579 580 // Remove the 64-bit feature which we only use to validate if a CPU can 581 // be used with 64-bit mode. 582 Bits &= ~Feature64BIT; 583 584 // Add the string version of all set bits. 585 for (unsigned i = 0; i != CPU_FEATURE_MAX; ++i) 586 if (Bits[i] && !FeatureInfos[i].Name.empty()) 587 EnabledFeatures.push_back(FeatureInfos[i].Name); 588 } 589 590 // For each feature that is (transitively) implied by this feature, set it. 591 static void getImpliedEnabledFeatures(FeatureBitset &Bits, 592 const FeatureBitset &Implies) { 593 // Fast path: Implies is often empty. 594 if (!Implies.any()) 595 return; 596 FeatureBitset Prev; 597 Bits |= Implies; 598 do { 599 Prev = Bits; 600 for (unsigned i = CPU_FEATURE_MAX; i;) 601 if (Bits[--i]) 602 Bits |= FeatureInfos[i].ImpliedFeatures; 603 } while (Prev != Bits); 604 } 605 606 /// Create bit vector of features that are implied disabled if the feature 607 /// passed in Value is disabled. 608 static void getImpliedDisabledFeatures(FeatureBitset &Bits, unsigned Value) { 609 // Check all features looking for any dependent on this feature. If we find 610 // one, mark it and recursively find any feature that depend on it. 611 FeatureBitset Prev; 612 Bits.set(Value); 613 do { 614 Prev = Bits; 615 for (unsigned i = 0; i != CPU_FEATURE_MAX; ++i) 616 if ((FeatureInfos[i].ImpliedFeatures & Bits).any()) 617 Bits.set(i); 618 } while (Prev != Bits); 619 } 620 621 void llvm::X86::updateImpliedFeatures( 622 StringRef Feature, bool Enabled, 623 StringMap<bool> &Features) { 624 auto I = llvm::find_if( 625 FeatureInfos, [&](const FeatureInfo &FI) { return FI.Name == Feature; }); 626 if (I == std::end(FeatureInfos)) { 627 // FIXME: This shouldn't happen, but may not have all features in the table 628 // yet. 629 return; 630 } 631 632 FeatureBitset ImpliedBits; 633 if (Enabled) 634 getImpliedEnabledFeatures(ImpliedBits, I->ImpliedFeatures); 635 else 636 getImpliedDisabledFeatures(ImpliedBits, 637 std::distance(std::begin(FeatureInfos), I)); 638 639 // Update the map entry for all implied features. 640 for (unsigned i = 0; i != CPU_FEATURE_MAX; ++i) 641 if (ImpliedBits[i] && !FeatureInfos[i].Name.empty()) 642 Features[FeatureInfos[i].Name] = Enabled; 643 } 644