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 <numeric> 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 | FeatureCRC32 | 142 FeatureSSE4_2 | 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 | FeatureCRC32 | 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 | FeatureGFNI | FeatureRDPID | 197 FeatureVAES | FeatureVPCLMULQDQ; 198 constexpr FeatureBitset FeaturesRocketlake = FeaturesICLClient & ~FeatureSGX; 199 constexpr FeatureBitset FeaturesICLServer = 200 FeaturesICLClient | FeatureCLWB | FeaturePCONFIG | FeatureWBNOINVD; 201 constexpr FeatureBitset FeaturesTigerlake = 202 FeaturesICLClient | FeatureAVX512VP2INTERSECT | FeatureMOVDIR64B | 203 FeatureCLWB | FeatureMOVDIRI | FeatureSHSTK | FeatureKL | FeatureWIDEKL; 204 constexpr FeatureBitset FeaturesSapphireRapids = 205 FeaturesICLServer | FeatureAMX_BF16 | FeatureAMX_INT8 | FeatureAMX_TILE | 206 FeatureAVX512BF16 | FeatureAVX512FP16 | FeatureAVX512VP2INTERSECT | 207 FeatureAVXVNNI | FeatureCLDEMOTE | FeatureENQCMD | FeatureMOVDIR64B | 208 FeatureMOVDIRI | FeaturePTWRITE | FeatureSERIALIZE | FeatureSHSTK | 209 FeatureTSXLDTRK | FeatureUINTR | FeatureWAITPKG; 210 211 // Intel Atom processors. 212 // Bonnell has feature parity with Core2 and adds MOVBE. 213 constexpr FeatureBitset FeaturesBonnell = FeaturesCore2 | FeatureMOVBE; 214 // Silvermont has parity with Westmere and Bonnell plus PRFCHW and RDRND. 215 constexpr FeatureBitset FeaturesSilvermont = 216 FeaturesBonnell | FeaturesWestmere | FeaturePRFCHW | FeatureRDRND; 217 constexpr FeatureBitset FeaturesGoldmont = 218 FeaturesSilvermont | FeatureAES | FeatureCLFLUSHOPT | FeatureFSGSBASE | 219 FeatureRDSEED | FeatureSHA | FeatureXSAVE | FeatureXSAVEC | 220 FeatureXSAVEOPT | FeatureXSAVES; 221 constexpr FeatureBitset FeaturesGoldmontPlus = 222 FeaturesGoldmont | FeaturePTWRITE | FeatureRDPID | FeatureSGX; 223 constexpr FeatureBitset FeaturesTremont = 224 FeaturesGoldmontPlus | FeatureCLWB | FeatureGFNI; 225 constexpr FeatureBitset FeaturesAlderlake = 226 FeaturesTremont | FeatureADX | FeatureBMI | FeatureBMI2 | FeatureF16C | 227 FeatureFMA | FeatureINVPCID | FeatureLZCNT | FeaturePCONFIG | FeaturePKU | 228 FeatureSERIALIZE | FeatureSHSTK | FeatureVAES | FeatureVPCLMULQDQ | 229 FeatureCLDEMOTE | FeatureMOVDIR64B | FeatureMOVDIRI | FeatureWAITPKG | 230 FeatureAVXVNNI | FeatureHRESET | FeatureWIDEKL; 231 232 // Geode Processor. 233 constexpr FeatureBitset FeaturesGeode = 234 FeatureX87 | FeatureCMPXCHG8B | FeatureMMX | Feature3DNOW | Feature3DNOWA; 235 236 // K6 processor. 237 constexpr FeatureBitset FeaturesK6 = FeatureX87 | FeatureCMPXCHG8B | FeatureMMX; 238 239 // K7 and K8 architecture processors. 240 constexpr FeatureBitset FeaturesAthlon = 241 FeatureX87 | FeatureCMPXCHG8B | FeatureMMX | Feature3DNOW | Feature3DNOWA; 242 constexpr FeatureBitset FeaturesAthlonXP = 243 FeaturesAthlon | FeatureFXSR | FeatureSSE; 244 constexpr FeatureBitset FeaturesK8 = 245 FeaturesAthlonXP | FeatureSSE2 | Feature64BIT; 246 constexpr FeatureBitset FeaturesK8SSE3 = FeaturesK8 | FeatureSSE3; 247 constexpr FeatureBitset FeaturesAMDFAM10 = 248 FeaturesK8SSE3 | FeatureCMPXCHG16B | FeatureLZCNT | FeaturePOPCNT | 249 FeaturePRFCHW | FeatureSAHF | FeatureSSE4_A; 250 251 // Bobcat architecture processors. 252 constexpr FeatureBitset FeaturesBTVER1 = 253 FeatureX87 | FeatureCMPXCHG8B | FeatureCMPXCHG16B | Feature64BIT | 254 FeatureFXSR | FeatureLZCNT | FeatureMMX | FeaturePOPCNT | FeaturePRFCHW | 255 FeatureSSE | FeatureSSE2 | FeatureSSE3 | FeatureSSSE3 | FeatureSSE4_A | 256 FeatureSAHF; 257 constexpr FeatureBitset FeaturesBTVER2 = 258 FeaturesBTVER1 | FeatureAES | FeatureAVX | FeatureBMI | FeatureCRC32 | 259 FeatureF16C | FeatureMOVBE | FeaturePCLMUL | FeatureXSAVE | FeatureXSAVEOPT; 260 261 // AMD Bulldozer architecture processors. 262 constexpr FeatureBitset FeaturesBDVER1 = 263 FeatureX87 | FeatureAES | FeatureAVX | FeatureCMPXCHG8B | 264 FeatureCMPXCHG16B | FeatureCRC32 | Feature64BIT | FeatureFMA4 | 265 FeatureFXSR | FeatureLWP | FeatureLZCNT | FeatureMMX | FeaturePCLMUL | 266 FeaturePOPCNT | FeaturePRFCHW | FeatureSAHF | FeatureSSE | FeatureSSE2 | 267 FeatureSSE3 | FeatureSSSE3 | FeatureSSE4_1 | FeatureSSE4_2 | FeatureSSE4_A | 268 FeatureXOP | FeatureXSAVE; 269 constexpr FeatureBitset FeaturesBDVER2 = 270 FeaturesBDVER1 | FeatureBMI | FeatureFMA | FeatureF16C | FeatureTBM; 271 constexpr FeatureBitset FeaturesBDVER3 = 272 FeaturesBDVER2 | FeatureFSGSBASE | FeatureXSAVEOPT; 273 constexpr FeatureBitset FeaturesBDVER4 = FeaturesBDVER3 | FeatureAVX2 | 274 FeatureBMI2 | FeatureMOVBE | 275 FeatureMWAITX | FeatureRDRND; 276 277 // AMD Zen architecture processors. 278 constexpr FeatureBitset FeaturesZNVER1 = 279 FeatureX87 | FeatureADX | FeatureAES | FeatureAVX | FeatureAVX2 | 280 FeatureBMI | FeatureBMI2 | FeatureCLFLUSHOPT | FeatureCLZERO | 281 FeatureCMPXCHG8B | FeatureCMPXCHG16B | FeatureCRC32 | Feature64BIT | 282 FeatureF16C | FeatureFMA | FeatureFSGSBASE | FeatureFXSR | FeatureLZCNT | 283 FeatureMMX | FeatureMOVBE | FeatureMWAITX | FeaturePCLMUL | FeaturePOPCNT | 284 FeaturePRFCHW | FeatureRDRND | FeatureRDSEED | FeatureSAHF | FeatureSHA | 285 FeatureSSE | FeatureSSE2 | FeatureSSE3 | FeatureSSSE3 | FeatureSSE4_1 | 286 FeatureSSE4_2 | FeatureSSE4_A | FeatureXSAVE | FeatureXSAVEC | 287 FeatureXSAVEOPT | FeatureXSAVES; 288 constexpr FeatureBitset FeaturesZNVER2 = FeaturesZNVER1 | FeatureCLWB | 289 FeatureRDPID | FeatureRDPRU | 290 FeatureWBNOINVD; 291 static constexpr FeatureBitset FeaturesZNVER3 = FeaturesZNVER2 | 292 FeatureINVPCID | FeaturePKU | 293 FeatureVAES | FeatureVPCLMULQDQ; 294 295 constexpr ProcInfo Processors[] = { 296 // Empty processor. Include X87 and CMPXCHG8 for backwards compatibility. 297 { {""}, CK_None, ~0U, FeatureX87 | FeatureCMPXCHG8B }, 298 // i386-generation processors. 299 { {"i386"}, CK_i386, ~0U, FeatureX87 }, 300 // i486-generation processors. 301 { {"i486"}, CK_i486, ~0U, FeatureX87 }, 302 { {"winchip-c6"}, CK_WinChipC6, ~0U, FeaturesPentiumMMX }, 303 { {"winchip2"}, CK_WinChip2, ~0U, FeaturesPentiumMMX | Feature3DNOW }, 304 { {"c3"}, CK_C3, ~0U, FeaturesPentiumMMX | Feature3DNOW }, 305 // i586-generation processors, P5 microarchitecture based. 306 { {"i586"}, CK_i586, ~0U, FeatureX87 | FeatureCMPXCHG8B }, 307 { {"pentium"}, CK_Pentium, ~0U, FeatureX87 | FeatureCMPXCHG8B }, 308 { {"pentium-mmx"}, CK_PentiumMMX, ~0U, FeaturesPentiumMMX }, 309 // i686-generation processors, P6 / Pentium M microarchitecture based. 310 { {"pentiumpro"}, CK_PentiumPro, ~0U, FeatureX87 | FeatureCMPXCHG8B }, 311 { {"i686"}, CK_i686, ~0U, FeatureX87 | FeatureCMPXCHG8B }, 312 { {"pentium2"}, CK_Pentium2, ~0U, FeaturesPentium2 }, 313 { {"pentium3"}, CK_Pentium3, ~0U, FeaturesPentium3 }, 314 { {"pentium3m"}, CK_Pentium3, ~0U, FeaturesPentium3 }, 315 { {"pentium-m"}, CK_PentiumM, ~0U, FeaturesPentium4 }, 316 { {"c3-2"}, CK_C3_2, ~0U, FeaturesPentium3 }, 317 { {"yonah"}, CK_Yonah, ~0U, FeaturesPrescott }, 318 // Netburst microarchitecture based processors. 319 { {"pentium4"}, CK_Pentium4, ~0U, FeaturesPentium4 }, 320 { {"pentium4m"}, CK_Pentium4, ~0U, FeaturesPentium4 }, 321 { {"prescott"}, CK_Prescott, ~0U, FeaturesPrescott }, 322 { {"nocona"}, CK_Nocona, ~0U, FeaturesNocona }, 323 // Core microarchitecture based processors. 324 { {"core2"}, CK_Core2, ~0U, FeaturesCore2 }, 325 { {"penryn"}, CK_Penryn, ~0U, FeaturesPenryn }, 326 // Atom processors 327 { {"bonnell"}, CK_Bonnell, FEATURE_SSSE3, FeaturesBonnell }, 328 { {"atom"}, CK_Bonnell, FEATURE_SSSE3, FeaturesBonnell }, 329 { {"silvermont"}, CK_Silvermont, FEATURE_SSE4_2, FeaturesSilvermont }, 330 { {"slm"}, CK_Silvermont, FEATURE_SSE4_2, FeaturesSilvermont }, 331 { {"goldmont"}, CK_Goldmont, FEATURE_SSE4_2, FeaturesGoldmont }, 332 { {"goldmont-plus"}, CK_GoldmontPlus, FEATURE_SSE4_2, FeaturesGoldmontPlus }, 333 { {"tremont"}, CK_Tremont, FEATURE_SSE4_2, FeaturesTremont }, 334 // Nehalem microarchitecture based processors. 335 { {"nehalem"}, CK_Nehalem, FEATURE_SSE4_2, FeaturesNehalem }, 336 { {"corei7"}, CK_Nehalem, FEATURE_SSE4_2, FeaturesNehalem }, 337 // Westmere microarchitecture based processors. 338 { {"westmere"}, CK_Westmere, FEATURE_PCLMUL, FeaturesWestmere }, 339 // Sandy Bridge microarchitecture based processors. 340 { {"sandybridge"}, CK_SandyBridge, FEATURE_AVX, FeaturesSandyBridge }, 341 { {"corei7-avx"}, CK_SandyBridge, FEATURE_AVX, FeaturesSandyBridge }, 342 // Ivy Bridge microarchitecture based processors. 343 { {"ivybridge"}, CK_IvyBridge, FEATURE_AVX, FeaturesIvyBridge }, 344 { {"core-avx-i"}, CK_IvyBridge, FEATURE_AVX, FeaturesIvyBridge }, 345 // Haswell microarchitecture based processors. 346 { {"haswell"}, CK_Haswell, FEATURE_AVX2, FeaturesHaswell }, 347 { {"core-avx2"}, CK_Haswell, FEATURE_AVX2, FeaturesHaswell }, 348 // Broadwell microarchitecture based processors. 349 { {"broadwell"}, CK_Broadwell, FEATURE_AVX2, FeaturesBroadwell }, 350 // Skylake client microarchitecture based processors. 351 { {"skylake"}, CK_SkylakeClient, FEATURE_AVX2, FeaturesSkylakeClient }, 352 // Skylake server microarchitecture based processors. 353 { {"skylake-avx512"}, CK_SkylakeServer, FEATURE_AVX512F, FeaturesSkylakeServer }, 354 { {"skx"}, CK_SkylakeServer, FEATURE_AVX512F, FeaturesSkylakeServer }, 355 // Cascadelake Server microarchitecture based processors. 356 { {"cascadelake"}, CK_Cascadelake, FEATURE_AVX512VNNI, FeaturesCascadeLake }, 357 // Cooperlake Server microarchitecture based processors. 358 { {"cooperlake"}, CK_Cooperlake, FEATURE_AVX512BF16, FeaturesCooperLake }, 359 // Cannonlake client microarchitecture based processors. 360 { {"cannonlake"}, CK_Cannonlake, FEATURE_AVX512VBMI, FeaturesCannonlake }, 361 // Icelake client microarchitecture based processors. 362 { {"icelake-client"}, CK_IcelakeClient, FEATURE_AVX512VBMI2, FeaturesICLClient }, 363 // Rocketlake microarchitecture based processors. 364 { {"rocketlake"}, CK_Rocketlake, FEATURE_AVX512VBMI2, FeaturesRocketlake }, 365 // Icelake server microarchitecture based processors. 366 { {"icelake-server"}, CK_IcelakeServer, FEATURE_AVX512VBMI2, FeaturesICLServer }, 367 // Tigerlake microarchitecture based processors. 368 { {"tigerlake"}, CK_Tigerlake, FEATURE_AVX512VP2INTERSECT, FeaturesTigerlake }, 369 // Sapphire Rapids microarchitecture based processors. 370 { {"sapphirerapids"}, CK_SapphireRapids, FEATURE_AVX512VP2INTERSECT, FeaturesSapphireRapids }, 371 // Alderlake microarchitecture based processors. 372 { {"alderlake"}, CK_Alderlake, FEATURE_AVX2, FeaturesAlderlake }, 373 // Knights Landing processor. 374 { {"knl"}, CK_KNL, FEATURE_AVX512F, FeaturesKNL }, 375 // Knights Mill processor. 376 { {"knm"}, CK_KNM, FEATURE_AVX5124FMAPS, FeaturesKNM }, 377 // Lakemont microarchitecture based processors. 378 { {"lakemont"}, CK_Lakemont, ~0U, FeatureCMPXCHG8B }, 379 // K6 architecture processors. 380 { {"k6"}, CK_K6, ~0U, FeaturesK6 }, 381 { {"k6-2"}, CK_K6_2, ~0U, FeaturesK6 | Feature3DNOW }, 382 { {"k6-3"}, CK_K6_3, ~0U, FeaturesK6 | Feature3DNOW }, 383 // K7 architecture processors. 384 { {"athlon"}, CK_Athlon, ~0U, FeaturesAthlon }, 385 { {"athlon-tbird"}, CK_Athlon, ~0U, FeaturesAthlon }, 386 { {"athlon-xp"}, CK_AthlonXP, ~0U, FeaturesAthlonXP }, 387 { {"athlon-mp"}, CK_AthlonXP, ~0U, FeaturesAthlonXP }, 388 { {"athlon-4"}, CK_AthlonXP, ~0U, FeaturesAthlonXP }, 389 // K8 architecture processors. 390 { {"k8"}, CK_K8, ~0U, FeaturesK8 }, 391 { {"athlon64"}, CK_K8, ~0U, FeaturesK8 }, 392 { {"athlon-fx"}, CK_K8, ~0U, FeaturesK8 }, 393 { {"opteron"}, CK_K8, ~0U, FeaturesK8 }, 394 { {"k8-sse3"}, CK_K8SSE3, ~0U, FeaturesK8SSE3 }, 395 { {"athlon64-sse3"}, CK_K8SSE3, ~0U, FeaturesK8SSE3 }, 396 { {"opteron-sse3"}, CK_K8SSE3, ~0U, FeaturesK8SSE3 }, 397 { {"amdfam10"}, CK_AMDFAM10, FEATURE_SSE4_A, FeaturesAMDFAM10 }, 398 { {"barcelona"}, CK_AMDFAM10, FEATURE_SSE4_A, FeaturesAMDFAM10 }, 399 // Bobcat architecture processors. 400 { {"btver1"}, CK_BTVER1, FEATURE_SSE4_A, FeaturesBTVER1 }, 401 { {"btver2"}, CK_BTVER2, FEATURE_BMI, FeaturesBTVER2 }, 402 // Bulldozer architecture processors. 403 { {"bdver1"}, CK_BDVER1, FEATURE_XOP, FeaturesBDVER1 }, 404 { {"bdver2"}, CK_BDVER2, FEATURE_FMA, FeaturesBDVER2 }, 405 { {"bdver3"}, CK_BDVER3, FEATURE_FMA, FeaturesBDVER3 }, 406 { {"bdver4"}, CK_BDVER4, FEATURE_AVX2, FeaturesBDVER4 }, 407 // Zen architecture processors. 408 { {"znver1"}, CK_ZNVER1, FEATURE_AVX2, FeaturesZNVER1 }, 409 { {"znver2"}, CK_ZNVER2, FEATURE_AVX2, FeaturesZNVER2 }, 410 { {"znver3"}, CK_ZNVER3, FEATURE_AVX2, FeaturesZNVER3 }, 411 // Generic 64-bit processor. 412 { {"x86-64"}, CK_x86_64, ~0U, FeaturesX86_64 }, 413 { {"x86-64-v2"}, CK_x86_64_v2, ~0U, FeaturesX86_64_V2 }, 414 { {"x86-64-v3"}, CK_x86_64_v3, ~0U, FeaturesX86_64_V3 }, 415 { {"x86-64-v4"}, CK_x86_64_v4, ~0U, FeaturesX86_64_V4 }, 416 // Geode processors. 417 { {"geode"}, CK_Geode, ~0U, FeaturesGeode }, 418 }; 419 420 constexpr const char *NoTuneList[] = {"x86-64-v2", "x86-64-v3", "x86-64-v4"}; 421 422 X86::CPUKind llvm::X86::parseArchX86(StringRef CPU, bool Only64Bit) { 423 for (const auto &P : Processors) 424 if (P.Name == CPU && (P.Features[FEATURE_64BIT] || !Only64Bit)) 425 return P.Kind; 426 427 return CK_None; 428 } 429 430 X86::CPUKind llvm::X86::parseTuneCPU(StringRef CPU, bool Only64Bit) { 431 if (llvm::is_contained(NoTuneList, CPU)) 432 return CK_None; 433 return parseArchX86(CPU, Only64Bit); 434 } 435 436 void llvm::X86::fillValidCPUArchList(SmallVectorImpl<StringRef> &Values, 437 bool Only64Bit) { 438 for (const auto &P : Processors) 439 if (!P.Name.empty() && (P.Features[FEATURE_64BIT] || !Only64Bit)) 440 Values.emplace_back(P.Name); 441 } 442 443 void llvm::X86::fillValidTuneCPUList(SmallVectorImpl<StringRef> &Values, 444 bool Only64Bit) { 445 for (const ProcInfo &P : Processors) 446 if (!P.Name.empty() && (P.Features[FEATURE_64BIT] || !Only64Bit) && 447 !llvm::is_contained(NoTuneList, P.Name)) 448 Values.emplace_back(P.Name); 449 } 450 451 ProcessorFeatures llvm::X86::getKeyFeature(X86::CPUKind Kind) { 452 // FIXME: Can we avoid a linear search here? The table might be sorted by 453 // CPUKind so we could binary search? 454 for (const auto &P : Processors) { 455 if (P.Kind == Kind) { 456 assert(P.KeyFeature != ~0U && "Processor does not have a key feature."); 457 return static_cast<ProcessorFeatures>(P.KeyFeature); 458 } 459 } 460 461 llvm_unreachable("Unable to find CPU kind!"); 462 } 463 464 // Features with no dependencies. 465 constexpr FeatureBitset ImpliedFeatures64BIT = {}; 466 constexpr FeatureBitset ImpliedFeaturesADX = {}; 467 constexpr FeatureBitset ImpliedFeaturesBMI = {}; 468 constexpr FeatureBitset ImpliedFeaturesBMI2 = {}; 469 constexpr FeatureBitset ImpliedFeaturesCLDEMOTE = {}; 470 constexpr FeatureBitset ImpliedFeaturesCLFLUSHOPT = {}; 471 constexpr FeatureBitset ImpliedFeaturesCLWB = {}; 472 constexpr FeatureBitset ImpliedFeaturesCLZERO = {}; 473 constexpr FeatureBitset ImpliedFeaturesCMOV = {}; 474 constexpr FeatureBitset ImpliedFeaturesCMPXCHG16B = {}; 475 constexpr FeatureBitset ImpliedFeaturesCMPXCHG8B = {}; 476 constexpr FeatureBitset ImpliedFeaturesCRC32 = {}; 477 constexpr FeatureBitset ImpliedFeaturesENQCMD = {}; 478 constexpr FeatureBitset ImpliedFeaturesFSGSBASE = {}; 479 constexpr FeatureBitset ImpliedFeaturesFXSR = {}; 480 constexpr FeatureBitset ImpliedFeaturesINVPCID = {}; 481 constexpr FeatureBitset ImpliedFeaturesLWP = {}; 482 constexpr FeatureBitset ImpliedFeaturesLZCNT = {}; 483 constexpr FeatureBitset ImpliedFeaturesMWAITX = {}; 484 constexpr FeatureBitset ImpliedFeaturesMOVBE = {}; 485 constexpr FeatureBitset ImpliedFeaturesMOVDIR64B = {}; 486 constexpr FeatureBitset ImpliedFeaturesMOVDIRI = {}; 487 constexpr FeatureBitset ImpliedFeaturesPCONFIG = {}; 488 constexpr FeatureBitset ImpliedFeaturesPOPCNT = {}; 489 constexpr FeatureBitset ImpliedFeaturesPKU = {}; 490 constexpr FeatureBitset ImpliedFeaturesPREFETCHWT1 = {}; 491 constexpr FeatureBitset ImpliedFeaturesPRFCHW = {}; 492 constexpr FeatureBitset ImpliedFeaturesPTWRITE = {}; 493 constexpr FeatureBitset ImpliedFeaturesRDPID = {}; 494 constexpr FeatureBitset ImpliedFeaturesRDPRU = {}; 495 constexpr FeatureBitset ImpliedFeaturesRDRND = {}; 496 constexpr FeatureBitset ImpliedFeaturesRDSEED = {}; 497 constexpr FeatureBitset ImpliedFeaturesRTM = {}; 498 constexpr FeatureBitset ImpliedFeaturesSAHF = {}; 499 constexpr FeatureBitset ImpliedFeaturesSERIALIZE = {}; 500 constexpr FeatureBitset ImpliedFeaturesSGX = {}; 501 constexpr FeatureBitset ImpliedFeaturesSHSTK = {}; 502 constexpr FeatureBitset ImpliedFeaturesTBM = {}; 503 constexpr FeatureBitset ImpliedFeaturesTSXLDTRK = {}; 504 constexpr FeatureBitset ImpliedFeaturesUINTR = {}; 505 constexpr FeatureBitset ImpliedFeaturesWAITPKG = {}; 506 constexpr FeatureBitset ImpliedFeaturesWBNOINVD = {}; 507 constexpr FeatureBitset ImpliedFeaturesVZEROUPPER = {}; 508 constexpr FeatureBitset ImpliedFeaturesX87 = {}; 509 constexpr FeatureBitset ImpliedFeaturesXSAVE = {}; 510 511 // Not really CPU features, but need to be in the table because clang uses 512 // target features to communicate them to the backend. 513 constexpr FeatureBitset ImpliedFeaturesRETPOLINE_EXTERNAL_THUNK = {}; 514 constexpr FeatureBitset ImpliedFeaturesRETPOLINE_INDIRECT_BRANCHES = {}; 515 constexpr FeatureBitset ImpliedFeaturesRETPOLINE_INDIRECT_CALLS = {}; 516 constexpr FeatureBitset ImpliedFeaturesLVI_CFI = {}; 517 constexpr FeatureBitset ImpliedFeaturesLVI_LOAD_HARDENING = {}; 518 519 // XSAVE features are dependent on basic XSAVE. 520 constexpr FeatureBitset ImpliedFeaturesXSAVEC = FeatureXSAVE; 521 constexpr FeatureBitset ImpliedFeaturesXSAVEOPT = FeatureXSAVE; 522 constexpr FeatureBitset ImpliedFeaturesXSAVES = FeatureXSAVE; 523 524 // MMX->3DNOW->3DNOWA chain. 525 constexpr FeatureBitset ImpliedFeaturesMMX = {}; 526 constexpr FeatureBitset ImpliedFeatures3DNOW = FeatureMMX; 527 constexpr FeatureBitset ImpliedFeatures3DNOWA = Feature3DNOW; 528 529 // SSE/AVX/AVX512F chain. 530 constexpr FeatureBitset ImpliedFeaturesSSE = {}; 531 constexpr FeatureBitset ImpliedFeaturesSSE2 = FeatureSSE; 532 constexpr FeatureBitset ImpliedFeaturesSSE3 = FeatureSSE2; 533 constexpr FeatureBitset ImpliedFeaturesSSSE3 = FeatureSSE3; 534 constexpr FeatureBitset ImpliedFeaturesSSE4_1 = FeatureSSSE3; 535 constexpr FeatureBitset ImpliedFeaturesSSE4_2 = FeatureSSE4_1; 536 constexpr FeatureBitset ImpliedFeaturesAVX = FeatureSSE4_2; 537 constexpr FeatureBitset ImpliedFeaturesAVX2 = FeatureAVX; 538 constexpr FeatureBitset ImpliedFeaturesAVX512F = 539 FeatureAVX2 | FeatureF16C | FeatureFMA; 540 541 // Vector extensions that build on SSE or AVX. 542 constexpr FeatureBitset ImpliedFeaturesAES = FeatureSSE2; 543 constexpr FeatureBitset ImpliedFeaturesF16C = FeatureAVX; 544 constexpr FeatureBitset ImpliedFeaturesFMA = FeatureAVX; 545 constexpr FeatureBitset ImpliedFeaturesGFNI = FeatureSSE2; 546 constexpr FeatureBitset ImpliedFeaturesPCLMUL = FeatureSSE2; 547 constexpr FeatureBitset ImpliedFeaturesSHA = FeatureSSE2; 548 constexpr FeatureBitset ImpliedFeaturesVAES = FeatureAES | FeatureAVX; 549 constexpr FeatureBitset ImpliedFeaturesVPCLMULQDQ = FeatureAVX | FeaturePCLMUL; 550 551 // AVX512 features. 552 constexpr FeatureBitset ImpliedFeaturesAVX512CD = FeatureAVX512F; 553 constexpr FeatureBitset ImpliedFeaturesAVX512BW = FeatureAVX512F; 554 constexpr FeatureBitset ImpliedFeaturesAVX512DQ = FeatureAVX512F; 555 constexpr FeatureBitset ImpliedFeaturesAVX512ER = FeatureAVX512F; 556 constexpr FeatureBitset ImpliedFeaturesAVX512PF = FeatureAVX512F; 557 constexpr FeatureBitset ImpliedFeaturesAVX512VL = FeatureAVX512F; 558 559 constexpr FeatureBitset ImpliedFeaturesAVX512BF16 = FeatureAVX512BW; 560 constexpr FeatureBitset ImpliedFeaturesAVX512BITALG = FeatureAVX512BW; 561 constexpr FeatureBitset ImpliedFeaturesAVX512IFMA = FeatureAVX512F; 562 constexpr FeatureBitset ImpliedFeaturesAVX512VNNI = FeatureAVX512F; 563 constexpr FeatureBitset ImpliedFeaturesAVX512VPOPCNTDQ = FeatureAVX512F; 564 constexpr FeatureBitset ImpliedFeaturesAVX512VBMI = FeatureAVX512BW; 565 constexpr FeatureBitset ImpliedFeaturesAVX512VBMI2 = FeatureAVX512BW; 566 constexpr FeatureBitset ImpliedFeaturesAVX512VP2INTERSECT = FeatureAVX512F; 567 568 // FIXME: These two aren't really implemented and just exist in the feature 569 // list for __builtin_cpu_supports. So omit their dependencies. 570 constexpr FeatureBitset ImpliedFeaturesAVX5124FMAPS = {}; 571 constexpr FeatureBitset ImpliedFeaturesAVX5124VNNIW = {}; 572 573 // SSE4_A->FMA4->XOP chain. 574 constexpr FeatureBitset ImpliedFeaturesSSE4_A = FeatureSSE3; 575 constexpr FeatureBitset ImpliedFeaturesFMA4 = FeatureAVX | FeatureSSE4_A; 576 constexpr FeatureBitset ImpliedFeaturesXOP = FeatureFMA4; 577 578 // AMX Features 579 constexpr FeatureBitset ImpliedFeaturesAMX_TILE = {}; 580 constexpr FeatureBitset ImpliedFeaturesAMX_BF16 = FeatureAMX_TILE; 581 constexpr FeatureBitset ImpliedFeaturesAMX_INT8 = FeatureAMX_TILE; 582 constexpr FeatureBitset ImpliedFeaturesHRESET = {}; 583 584 static constexpr FeatureBitset ImpliedFeaturesAVX512FP16 = 585 FeatureAVX512BW | FeatureAVX512DQ | FeatureAVX512VL; 586 // Key Locker Features 587 constexpr FeatureBitset ImpliedFeaturesKL = FeatureSSE2; 588 constexpr FeatureBitset ImpliedFeaturesWIDEKL = FeatureKL; 589 590 // AVXVNNI Features 591 constexpr FeatureBitset ImpliedFeaturesAVXVNNI = FeatureAVX2; 592 593 constexpr FeatureInfo FeatureInfos[X86::CPU_FEATURE_MAX] = { 594 #define X86_FEATURE(ENUM, STR) {{STR}, ImpliedFeatures##ENUM}, 595 #include "llvm/Support/X86TargetParser.def" 596 }; 597 598 void llvm::X86::getFeaturesForCPU(StringRef CPU, 599 SmallVectorImpl<StringRef> &EnabledFeatures) { 600 auto I = llvm::find_if(Processors, 601 [&](const ProcInfo &P) { return P.Name == CPU; }); 602 assert(I != std::end(Processors) && "Processor not found!"); 603 604 FeatureBitset Bits = I->Features; 605 606 // Remove the 64-bit feature which we only use to validate if a CPU can 607 // be used with 64-bit mode. 608 Bits &= ~Feature64BIT; 609 610 // Add the string version of all set bits. 611 for (unsigned i = 0; i != CPU_FEATURE_MAX; ++i) 612 if (Bits[i] && !FeatureInfos[i].Name.empty()) 613 EnabledFeatures.push_back(FeatureInfos[i].Name); 614 } 615 616 // For each feature that is (transitively) implied by this feature, set it. 617 static void getImpliedEnabledFeatures(FeatureBitset &Bits, 618 const FeatureBitset &Implies) { 619 // Fast path: Implies is often empty. 620 if (!Implies.any()) 621 return; 622 FeatureBitset Prev; 623 Bits |= Implies; 624 do { 625 Prev = Bits; 626 for (unsigned i = CPU_FEATURE_MAX; i;) 627 if (Bits[--i]) 628 Bits |= FeatureInfos[i].ImpliedFeatures; 629 } while (Prev != Bits); 630 } 631 632 /// Create bit vector of features that are implied disabled if the feature 633 /// passed in Value is disabled. 634 static void getImpliedDisabledFeatures(FeatureBitset &Bits, unsigned Value) { 635 // Check all features looking for any dependent on this feature. If we find 636 // one, mark it and recursively find any feature that depend on it. 637 FeatureBitset Prev; 638 Bits.set(Value); 639 do { 640 Prev = Bits; 641 for (unsigned i = 0; i != CPU_FEATURE_MAX; ++i) 642 if ((FeatureInfos[i].ImpliedFeatures & Bits).any()) 643 Bits.set(i); 644 } while (Prev != Bits); 645 } 646 647 void llvm::X86::updateImpliedFeatures( 648 StringRef Feature, bool Enabled, 649 StringMap<bool> &Features) { 650 auto I = llvm::find_if( 651 FeatureInfos, [&](const FeatureInfo &FI) { return FI.Name == Feature; }); 652 if (I == std::end(FeatureInfos)) { 653 // FIXME: This shouldn't happen, but may not have all features in the table 654 // yet. 655 return; 656 } 657 658 FeatureBitset ImpliedBits; 659 if (Enabled) 660 getImpliedEnabledFeatures(ImpliedBits, I->ImpliedFeatures); 661 else 662 getImpliedDisabledFeatures(ImpliedBits, 663 std::distance(std::begin(FeatureInfos), I)); 664 665 // Update the map entry for all implied features. 666 for (unsigned i = 0; i != CPU_FEATURE_MAX; ++i) 667 if (ImpliedBits[i] && !FeatureInfos[i].Name.empty()) 668 Features[FeatureInfos[i].Name] = Enabled; 669 } 670 671 uint64_t llvm::X86::getCpuSupportsMask(ArrayRef<StringRef> FeatureStrs) { 672 // Processor features and mapping to processor feature value. 673 uint64_t FeaturesMask = 0; 674 for (const StringRef &FeatureStr : FeatureStrs) { 675 unsigned Feature = StringSwitch<unsigned>(FeatureStr) 676 #define X86_FEATURE_COMPAT(ENUM, STR, PRIORITY) \ 677 .Case(STR, llvm::X86::FEATURE_##ENUM) 678 #include "llvm/Support/X86TargetParser.def" 679 ; 680 FeaturesMask |= (1ULL << Feature); 681 } 682 return FeaturesMask; 683 } 684 685 unsigned llvm::X86::getFeaturePriority(ProcessorFeatures Feat) { 686 #ifndef NDEBUG 687 // Check that priorities are set properly in the .def file. We expect that 688 // "compat" features are assigned non-duplicate consecutive priorities 689 // starting from zero (0, 1, ..., num_features - 1). 690 #define X86_FEATURE_COMPAT(ENUM, STR, PRIORITY) PRIORITY, 691 unsigned Priorities[] = { 692 #include "llvm/Support/X86TargetParser.def" 693 std::numeric_limits<unsigned>::max() // Need to consume last comma. 694 }; 695 std::array<unsigned, array_lengthof(Priorities) - 1> HelperList; 696 std::iota(HelperList.begin(), HelperList.end(), 0); 697 assert(std::is_permutation(HelperList.begin(), HelperList.end(), 698 std::begin(Priorities), 699 std::prev(std::end(Priorities))) && 700 "Priorities don't form consecutive range!"); 701 #endif 702 703 switch (Feat) { 704 #define X86_FEATURE_COMPAT(ENUM, STR, PRIORITY) \ 705 case X86::FEATURE_##ENUM: \ 706 return PRIORITY; 707 #include "llvm/Support/X86TargetParser.def" 708 default: 709 llvm_unreachable("No Feature Priority for non-CPUSupports Features"); 710 } 711 } 712