1//===-- RISCVFeatures.td - RISC-V Features and Extensions --*- tablegen -*-===// 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//===----------------------------------------------------------------------===// 10// RISC-V subtarget features and instruction predicates. 11//===----------------------------------------------------------------------===// 12 13def FeatureStdExtZicsr 14 : SubtargetFeature<"zicsr", "HasStdExtZicsr", "true", 15 "'zicsr' (CSRs)">; 16def HasStdExtZicsr : Predicate<"Subtarget->hasStdExtZicsr()">, 17 AssemblerPredicate<(all_of FeatureStdExtZicsr), 18 "'Zicsr' (CSRs)">; 19 20def FeatureStdExtM 21 : SubtargetFeature<"m", "HasStdExtM", "true", 22 "'M' (Integer Multiplication and Division)">; 23def HasStdExtM : Predicate<"Subtarget->hasStdExtM()">, 24 AssemblerPredicate<(all_of FeatureStdExtM), 25 "'M' (Integer Multiplication and Division)">; 26 27def FeatureStdExtZmmul 28 : SubtargetFeature<"zmmul", "HasStdExtZmmul", "true", 29 "'Zmmul' (Integer Multiplication)">; 30 31def HasStdExtMOrZmmul 32 : Predicate<"Subtarget->hasStdExtM() || Subtarget->hasStdExtZmmul()">, 33 AssemblerPredicate<(any_of FeatureStdExtM, FeatureStdExtZmmul), 34 "'M' (Integer Multiplication and Division) or " 35 "'Zmmul' (Integer Multiplication)">; 36 37def FeatureStdExtA 38 : SubtargetFeature<"a", "HasStdExtA", "true", 39 "'A' (Atomic Instructions)">; 40def HasStdExtA : Predicate<"Subtarget->hasStdExtA()">, 41 AssemblerPredicate<(all_of FeatureStdExtA), 42 "'A' (Atomic Instructions)">; 43 44def FeatureStdExtF 45 : SubtargetFeature<"f", "HasStdExtF", "true", 46 "'F' (Single-Precision Floating-Point)", 47 [FeatureStdExtZicsr]>; 48def HasStdExtF : Predicate<"Subtarget->hasStdExtF()">, 49 AssemblerPredicate<(all_of FeatureStdExtF), 50 "'F' (Single-Precision Floating-Point)">; 51 52def FeatureStdExtD 53 : SubtargetFeature<"d", "HasStdExtD", "true", 54 "'D' (Double-Precision Floating-Point)", 55 [FeatureStdExtF]>; 56def HasStdExtD : Predicate<"Subtarget->hasStdExtD()">, 57 AssemblerPredicate<(all_of FeatureStdExtD), 58 "'D' (Double-Precision Floating-Point)">; 59 60def FeatureStdExtH 61 : SubtargetFeature<"h", "HasStdExtH", "true", 62 "'H' (Hypervisor)">; 63 64def HasStdExtH : Predicate<"Subtarget->hasStdExtH()">, 65 AssemblerPredicate<(all_of FeatureStdExtH), 66 "'H' (Hypervisor)">; 67 68def FeatureStdExtZihintpause 69 : SubtargetFeature<"zihintpause", "HasStdExtZihintpause", "true", 70 "'Zihintpause' (Pause Hint)">; 71def HasStdExtZihintpause : Predicate<"Subtarget->hasStdExtZihintpause()">, 72 AssemblerPredicate<(all_of FeatureStdExtZihintpause), 73 "'Zihintpause' (Pause Hint)">; 74 75def FeatureStdExtZihintntl 76 : SubtargetFeature<"experimental-zihintntl", "HasStdExtZihintntl", "true", 77 "'Zihintntl' (Non-Temporal Locality Hints)">; 78def HasStdExtZihintntl : Predicate<"Subtarget->hasStdExtZihintntl()">, 79 AssemblerPredicate<(all_of FeatureStdExtZihintntl), 80 "'Zihintntl' (Non-Temporal Locality Hints)">; 81 82def FeatureStdExtZifencei 83 : SubtargetFeature<"zifencei", "HasStdExtZifencei", "true", 84 "'Zifencei' (fence.i)">; 85def HasStdExtZifencei : Predicate<"Subtarget->hasStdExtZifencei()">, 86 AssemblerPredicate<(all_of FeatureStdExtZifencei), 87 "'Zifencei' (fence.i)">; 88 89def FeatureStdExtZicntr 90 : SubtargetFeature<"zicntr", "HasStdExtZicntr", "true", 91 "'Zicntr' (Base Counters and Timers)", 92 [FeatureStdExtZicsr]>; 93 94def FeatureStdExtZihpm 95 : SubtargetFeature<"zihpm", "HasStdExtZihpm", "true", 96 "'Zihpm' (Hardware Performance Counters)", 97 [FeatureStdExtZicsr]>; 98 99def FeatureStdExtZfhmin 100 : SubtargetFeature<"zfhmin", "HasStdExtZfhmin", "true", 101 "'Zfhmin' (Half-Precision Floating-Point Minimal)", 102 [FeatureStdExtF]>; 103def HasStdExtZfhmin : Predicate<"Subtarget->hasStdExtZfhmin()">, 104 AssemblerPredicate<(all_of FeatureStdExtZfhmin), 105 "'Zfhmin' (Half-Precision Floating-Point Minimal)">; 106 107def FeatureStdExtZfh 108 : SubtargetFeature<"zfh", "HasStdExtZfh", "true", 109 "'Zfh' (Half-Precision Floating-Point)", 110 [FeatureStdExtF]>; 111def HasStdExtZfh : Predicate<"Subtarget->hasStdExtZfh()">, 112 AssemblerPredicate<(all_of FeatureStdExtZfh), 113 "'Zfh' (Half-Precision Floating-Point)">; 114def NoStdExtZfh : Predicate<"!Subtarget->hasStdExtZfh()">; 115 116def HasStdExtZfhOrZfhmin 117 : Predicate<"Subtarget->hasStdExtZfhOrZfhmin()">, 118 AssemblerPredicate<(any_of FeatureStdExtZfh, FeatureStdExtZfhmin), 119 "'Zfh' (Half-Precision Floating-Point) or " 120 "'Zfhmin' (Half-Precision Floating-Point Minimal)">; 121 122def FeatureStdExtZfinx 123 : SubtargetFeature<"zfinx", "HasStdExtZfinx", "true", 124 "'Zfinx' (Float in Integer)", 125 [FeatureStdExtZicsr]>; 126def HasStdExtZfinx : Predicate<"Subtarget->hasStdExtZfinx()">, 127 AssemblerPredicate<(all_of FeatureStdExtZfinx), 128 "'Zfinx' (Float in Integer)">; 129 130def FeatureStdExtZdinx 131 : SubtargetFeature<"zdinx", "HasStdExtZdinx", "true", 132 "'Zdinx' (Double in Integer)", 133 [FeatureStdExtZfinx]>; 134def HasStdExtZdinx : Predicate<"Subtarget->hasStdExtZdinx()">, 135 AssemblerPredicate<(all_of FeatureStdExtZdinx), 136 "'Zdinx' (Double in Integer)">; 137 138def FeatureStdExtZhinxmin 139 : SubtargetFeature<"zhinxmin", "HasStdExtZhinxmin", "true", 140 "'Zhinxmin' (Half Float in Integer Minimal)", 141 [FeatureStdExtZfinx]>; 142def HasStdExtZhinxmin : Predicate<"Subtarget->hasStdExtZhinxmin()">, 143 AssemblerPredicate<(all_of FeatureStdExtZhinxmin), 144 "'Zhinxmin' (Half Float in Integer Minimal)">; 145 146def FeatureStdExtZhinx 147 : SubtargetFeature<"zhinx", "HasStdExtZhinx", "true", 148 "'Zhinx' (Half Float in Integer)", 149 [FeatureStdExtZfinx]>; 150def HasStdExtZhinx : Predicate<"Subtarget->hasStdExtZhinx()">, 151 AssemblerPredicate<(all_of FeatureStdExtZhinx), 152 "'Zhinx' (Half Float in Integer)">; 153def NoStdExtZhinx : Predicate<"!Subtarget->hasStdExtZhinx()">; 154 155def HasStdExtZhinxOrZhinxmin 156 : Predicate<"Subtarget->hasStdExtZhinx() || Subtarget->hasStdExtZhinxmin()">, 157 AssemblerPredicate<(any_of FeatureStdExtZhinx, FeatureStdExtZhinxmin), 158 "'Zhinx' (Half Float in Integer) or " 159 "'Zhinxmin' (Half Float in Integer Minimal)">; 160 161def FeatureStdExtZfa 162 : SubtargetFeature<"experimental-zfa", "HasStdExtZfa", "true", 163 "'Zfa' (Additional Floating-Point)", 164 [FeatureStdExtF]>; 165def HasStdExtZfa : Predicate<"Subtarget->hasStdExtZfa()">, 166 AssemblerPredicate<(all_of FeatureStdExtZfa), 167 "'Zfa' (Additional Floating-Point)">; 168 169def FeatureStdExtC 170 : SubtargetFeature<"c", "HasStdExtC", "true", 171 "'C' (Compressed Instructions)">; 172def HasStdExtC : Predicate<"Subtarget->hasStdExtC()">, 173 AssemblerPredicate<(all_of FeatureStdExtC), 174 "'C' (Compressed Instructions)">; 175 176def FeatureStdExtZba 177 : SubtargetFeature<"zba", "HasStdExtZba", "true", 178 "'Zba' (Address Generation Instructions)">; 179def HasStdExtZba : Predicate<"Subtarget->hasStdExtZba()">, 180 AssemblerPredicate<(all_of FeatureStdExtZba), 181 "'Zba' (Address Generation Instructions)">; 182def NotHasStdExtZba : Predicate<"!Subtarget->hasStdExtZba()">; 183 184def FeatureStdExtZbb 185 : SubtargetFeature<"zbb", "HasStdExtZbb", "true", 186 "'Zbb' (Basic Bit-Manipulation)">; 187def HasStdExtZbb : Predicate<"Subtarget->hasStdExtZbb()">, 188 AssemblerPredicate<(all_of FeatureStdExtZbb), 189 "'Zbb' (Basic Bit-Manipulation)">; 190 191def FeatureStdExtZbc 192 : SubtargetFeature<"zbc", "HasStdExtZbc", "true", 193 "'Zbc' (Carry-Less Multiplication)">; 194def HasStdExtZbc : Predicate<"Subtarget->hasStdExtZbc()">, 195 AssemblerPredicate<(all_of FeatureStdExtZbc), 196 "'Zbc' (Carry-Less Multiplication)">; 197 198def FeatureStdExtZbs 199 : SubtargetFeature<"zbs", "HasStdExtZbs", "true", 200 "'Zbs' (Single-Bit Instructions)">; 201def HasStdExtZbs : Predicate<"Subtarget->hasStdExtZbs()">, 202 AssemblerPredicate<(all_of FeatureStdExtZbs), 203 "'Zbs' (Single-Bit Instructions)">; 204 205def FeatureStdExtZbkb 206 : SubtargetFeature<"zbkb", "HasStdExtZbkb", "true", 207 "'Zbkb' (Bitmanip instructions for Cryptography)">; 208def HasStdExtZbkb : Predicate<"Subtarget->hasStdExtZbkb()">, 209 AssemblerPredicate<(all_of FeatureStdExtZbkb), 210 "'Zbkb' (Bitmanip instructions for Cryptography)">; 211 212def FeatureStdExtZbkx 213 : SubtargetFeature<"zbkx", "HasStdExtZbkx", "true", 214 "'Zbkx' (Crossbar permutation instructions)">; 215def HasStdExtZbkx : Predicate<"Subtarget->hasStdExtZbkx()">, 216 AssemblerPredicate<(all_of FeatureStdExtZbkx), 217 "'Zbkx' (Crossbar permutation instructions)">; 218 219def HasStdExtZbbOrZbkb 220 : Predicate<"Subtarget->hasStdExtZbb() || Subtarget->hasStdExtZbkb()">, 221 AssemblerPredicate<(any_of FeatureStdExtZbb, FeatureStdExtZbkb), 222 "'Zbb' (Basic Bit-Manipulation) or " 223 "'Zbkb' (Bitmanip instructions for Cryptography)">; 224 225// The Carry-less multiply subextension for cryptography is a subset of basic 226// carry-less multiply subextension. The former should be enabled if the latter 227// is enabled. 228def FeatureStdExtZbkc 229 : SubtargetFeature<"zbkc", "HasStdExtZbkc", "true", 230 "'Zbkc' (Carry-less multiply instructions for " 231 "Cryptography)">; 232def HasStdExtZbkc 233 : Predicate<"Subtarget->hasStdExtZbkc()">, 234 AssemblerPredicate<(all_of FeatureStdExtZbkc), 235 "'Zbkc' (Carry-less multiply instructions for Cryptography)">; 236 237def HasStdExtZbcOrZbkc 238 : Predicate<"Subtarget->hasStdExtZbc() || Subtarget->hasStdExtZbkc()">, 239 AssemblerPredicate<(any_of FeatureStdExtZbc, FeatureStdExtZbkc), 240 "'Zbc' (Carry-Less Multiplication) or " 241 "'Zbkc' (Carry-less multiply instructions " 242 "for Cryptography)">; 243 244def FeatureStdExtZknd 245 : SubtargetFeature<"zknd", "HasStdExtZknd", "true", 246 "'Zknd' (NIST Suite: AES Decryption)">; 247def HasStdExtZknd : Predicate<"Subtarget->hasStdExtZknd()">, 248 AssemblerPredicate<(all_of FeatureStdExtZknd), 249 "'Zknd' (NIST Suite: AES Decryption)">; 250 251def FeatureStdExtZkne 252 : SubtargetFeature<"zkne", "HasStdExtZkne", "true", 253 "'Zkne' (NIST Suite: AES Encryption)">; 254def HasStdExtZkne : Predicate<"Subtarget->hasStdExtZkne()">, 255 AssemblerPredicate<(all_of FeatureStdExtZkne), 256 "'Zkne' (NIST Suite: AES Encryption)">; 257 258// Some instructions belong to both Zknd and Zkne subextensions. 259// They should be enabled if either has been specified. 260def HasStdExtZkndOrZkne 261 : Predicate<"Subtarget->hasStdExtZknd() || Subtarget->hasStdExtZkne()">, 262 AssemblerPredicate<(any_of FeatureStdExtZknd, FeatureStdExtZkne), 263 "'Zknd' (NIST Suite: AES Decryption) or " 264 "'Zkne' (NIST Suite: AES Encryption)">; 265 266def FeatureStdExtZknh 267 : SubtargetFeature<"zknh", "HasStdExtZknh", "true", 268 "'Zknh' (NIST Suite: Hash Function Instructions)">; 269def HasStdExtZknh : Predicate<"Subtarget->hasStdExtZknh()">, 270 AssemblerPredicate<(all_of FeatureStdExtZknh), 271 "'Zknh' (NIST Suite: Hash Function Instructions)">; 272 273def FeatureStdExtZksed 274 : SubtargetFeature<"zksed", "HasStdExtZksed", "true", 275 "'Zksed' (ShangMi Suite: SM4 Block Cipher Instructions)">; 276def HasStdExtZksed : Predicate<"Subtarget->hasStdExtZksed()">, 277 AssemblerPredicate<(all_of FeatureStdExtZksed), 278 "'Zksed' (ShangMi Suite: SM4 Block Cipher Instructions)">; 279 280def FeatureStdExtZksh 281 : SubtargetFeature<"zksh", "HasStdExtZksh", "true", 282 "'Zksh' (ShangMi Suite: SM3 Hash Function Instructions)">; 283def HasStdExtZksh : Predicate<"Subtarget->hasStdExtZksh()">, 284 AssemblerPredicate<(all_of FeatureStdExtZksh), 285 "'Zksh' (ShangMi Suite: SM3 Hash Function " 286 "Instructions)">; 287 288def FeatureStdExtZkr 289 : SubtargetFeature<"zkr", "HasStdExtZkr", "true", 290 "'Zkr' (Entropy Source Extension)">; 291def HasStdExtZkr : Predicate<"Subtarget->hasStdExtZkr()">, 292 AssemblerPredicate<(all_of FeatureStdExtZkr), 293 "'Zkr' (Entropy Source Extension)">; 294 295def FeatureStdExtZkn 296 : SubtargetFeature<"zkn", "HasStdExtZkn", "true", 297 "'Zkn' (NIST Algorithm Suite)", 298 [FeatureStdExtZbkb, 299 FeatureStdExtZbkc, 300 FeatureStdExtZbkx, 301 FeatureStdExtZkne, 302 FeatureStdExtZknd, 303 FeatureStdExtZknh]>; 304 305def FeatureStdExtZks 306 : SubtargetFeature<"zks", "HasStdExtZks", "true", 307 "'Zks' (ShangMi Algorithm Suite)", 308 [FeatureStdExtZbkb, 309 FeatureStdExtZbkc, 310 FeatureStdExtZbkx, 311 FeatureStdExtZksed, 312 FeatureStdExtZksh]>; 313 314def FeatureStdExtZkt 315 : SubtargetFeature<"zkt", "HasStdExtZkt", "true", 316 "'Zkt' (Data Independent Execution Latency)">; 317 318def FeatureStdExtZk 319 : SubtargetFeature<"zk", "HasStdExtZk", "true", 320 "'Zk' (Standard scalar cryptography extension)", 321 [FeatureStdExtZkn, 322 FeatureStdExtZkr, 323 FeatureStdExtZkt]>; 324 325def FeatureStdExtZca 326 : SubtargetFeature<"zca", "HasStdExtZca", "true", 327 "'Zca' (part of the C extension, excluding compressed " 328 "floating point loads/stores)">; 329 330def HasStdExtCOrZca 331 : Predicate<"Subtarget->hasStdExtCOrZca()">, 332 AssemblerPredicate<(any_of FeatureStdExtC, FeatureStdExtZca), 333 "'C' (Compressed Instructions) or " 334 "'Zca' (part of the C extension, excluding " 335 "compressed floating point loads/stores)">; 336 337def FeatureStdExtZcb 338 : SubtargetFeature<"zcb", "HasStdExtZcb", "true", 339 "'Zcb' (Compressed basic bit manipulation instructions)", 340 [FeatureStdExtZca]>; 341def HasStdExtZcb : Predicate<"Subtarget->hasStdExtZcb()">, 342 AssemblerPredicate<(all_of FeatureStdExtZcb), 343 "'Zcb' (Compressed basic bit manipulation instructions)">; 344 345def FeatureStdExtZcd 346 : SubtargetFeature<"zcd", "HasStdExtZcd", "true", 347 "'Zcd' (Compressed Double-Precision Floating-Point Instructions)", 348 [FeatureStdExtZca]>; 349 350def HasStdExtCOrZcd 351 : Predicate<"Subtarget->hasStdExtC() || Subtarget->hasStdExtZcd()">, 352 AssemblerPredicate<(any_of FeatureStdExtC, FeatureStdExtZcd), 353 "'C' (Compressed Instructions) or " 354 "'Zcd' (Compressed Double-Precision Floating-Point Instructions)">; 355 356def FeatureStdExtZcf 357 : SubtargetFeature<"zcf", "HasStdExtZcf", "true", 358 "'Zcf' (Compressed Single-Precision Floating-Point Instructions)", 359 [FeatureStdExtZca]>; 360 361def FeatureStdExtZcmp 362 : SubtargetFeature<"zcmp", "HasStdExtZcmp", "true", 363 "'Zcmp' (sequenced instuctions for code-size reduction)", 364 [FeatureStdExtZca]>; 365def HasStdExtZcmp : Predicate<"Subtarget->hasStdExtZcmp() && !Subtarget->hasStdExtC()">, 366 AssemblerPredicate<(all_of FeatureStdExtZcmp), 367 "'Zcmp' (sequenced instuctions for code-size reduction)">; 368 369def FeatureStdExtZcmt 370 : SubtargetFeature<"zcmt", "HasStdExtZcmt", "true", 371 "'Zcmt' (table jump instuctions for code-size reduction)", 372 [FeatureStdExtZca, FeatureStdExtZicsr]>; 373def HasStdExtZcmt : Predicate<"Subtarget->hasStdExtZcmt()">, 374 AssemblerPredicate<(all_of FeatureStdExtZcmt), 375 "'Zcmt' (table jump instuctions for code-size reduction)">; 376 377def FeatureStdExtZce 378 : SubtargetFeature<"zce", "HasStdExtZce", "true", 379 "'Zce' (Compressed extensions for microcontrollers)", 380 [FeatureStdExtZca, FeatureStdExtZcb, FeatureStdExtZcmp, 381 FeatureStdExtZcmt]>; 382 383def HasStdExtCOrZcfOrZce 384 : Predicate<"Subtarget->hasStdExtC() || Subtarget->hasStdExtZcf() " 385 "Subtarget->hasStdExtZce()">, 386 AssemblerPredicate<(any_of FeatureStdExtC, FeatureStdExtZcf, 387 FeatureStdExtZce), 388 "'C' (Compressed Instructions) or " 389 "'Zcf' (Compressed Single-Precision Floating-Point Instructions)">; 390 391def FeatureNoRVCHints 392 : SubtargetFeature<"no-rvc-hints", "EnableRVCHintInstrs", "false", 393 "Disable RVC Hint Instructions.">; 394def HasRVCHints : Predicate<"Subtarget->enableRVCHintInstrs()">, 395 AssemblerPredicate<(all_of(not FeatureNoRVCHints)), 396 "RVC Hint Instructions">; 397 398def FeatureStdExtZvl32b : SubtargetFeature<"zvl32b", "ZvlLen", "32", 399 "'Zvl' (Minimum Vector Length) 32">; 400 401foreach i = { 6-16 } in { 402 defvar I = !shl(1, i); 403 def FeatureStdExtZvl#I#b : 404 SubtargetFeature<"zvl"#I#"b", "ZvlLen", !cast<string>(I), 405 "'Zvl' (Minimum Vector Length) "#I, 406 [!cast<SubtargetFeature>("FeatureStdExtZvl"#!srl(I, 1)#"b")]>; 407} 408 409def FeatureStdExtZve32x 410 : SubtargetFeature<"zve32x", "HasStdExtZve32x", "true", 411 "'Zve32x' (Vector Extensions for Embedded Processors " 412 "with maximal 32 EEW)", 413 [FeatureStdExtZicsr, FeatureStdExtZvl32b]>; 414 415def FeatureStdExtZve32f 416 : SubtargetFeature<"zve32f", "HasStdExtZve32f", "true", 417 "'Zve32f' (Vector Extensions for Embedded Processors " 418 "with maximal 32 EEW and F extension)", 419 [FeatureStdExtZve32x, FeatureStdExtF]>; 420 421def FeatureStdExtZve64x 422 : SubtargetFeature<"zve64x", "HasStdExtZve64x", "true", 423 "'Zve64x' (Vector Extensions for Embedded Processors " 424 "with maximal 64 EEW)", 425 [FeatureStdExtZve32x, FeatureStdExtZvl64b]>; 426 427def FeatureStdExtZve64f 428 : SubtargetFeature<"zve64f", "HasStdExtZve64f", "true", 429 "'Zve64f' (Vector Extensions for Embedded Processors " 430 "with maximal 64 EEW and F extension)", 431 [FeatureStdExtZve32f, FeatureStdExtZve64x]>; 432 433def FeatureStdExtZve64d 434 : SubtargetFeature<"zve64d", "HasStdExtZve64d", "true", 435 "'Zve64d' (Vector Extensions for Embedded Processors " 436 "with maximal 64 EEW, F and D extension)", 437 [FeatureStdExtZve64f, FeatureStdExtD]>; 438 439def FeatureStdExtV 440 : SubtargetFeature<"v", "HasStdExtV", "true", 441 "'V' (Vector Extension for Application Processors)", 442 [FeatureStdExtZvl128b, FeatureStdExtZve64d]>; 443 444def HasVInstructions : Predicate<"Subtarget->hasVInstructions()">, 445 AssemblerPredicate< 446 (any_of FeatureStdExtZve32x), 447 "'V' (Vector Extension for Application Processors), 'Zve32x' or " 448 "'Zve64x' (Vector Extensions for Embedded Processors)">; 449def HasVInstructionsI64 : Predicate<"Subtarget->hasVInstructionsI64()">, 450 AssemblerPredicate< 451 (any_of FeatureStdExtZve64x), 452 "'V' (Vector Extension for Application Processors) or 'Zve64x' " 453 "(Vector Extensions for Embedded Processors)">; 454def HasVInstructionsAnyF : Predicate<"Subtarget->hasVInstructionsAnyF()">, 455 AssemblerPredicate< 456 (any_of FeatureStdExtZve32f), 457 "'V' (Vector Extension for Application Processors), 'Zve32f', " 458 "'Zve64f' or 'Zve64d' (Vector Extensions for Embedded Processors)">; 459 460def HasVInstructionsF64 : Predicate<"Subtarget->hasVInstructionsF64()">; 461 462def HasVInstructionsFullMultiply : Predicate<"Subtarget->hasVInstructionsFullMultiply()">; 463 464def FeatureStdExtZvfbfmin 465 : SubtargetFeature<"experimental-zvfbfmin", "HasStdExtZvfbfmin", "true", 466 "'Zvbfmin' (Vector BF16 Converts)", 467 [FeatureStdExtZve32f]>; 468def HasStdExtZvfbfmin : Predicate<"Subtarget->hasStdExtZvfbfmin()">, 469 AssemblerPredicate<(all_of FeatureStdExtZvfbfmin), 470 "'Zvfbfmin' (Vector BF16 Converts)">; 471 472def FeatureStdExtZvfbfwma 473 : SubtargetFeature<"experimental-zvfbfwma", "HasStdExtZvfbfwma", "true", 474 "'Zvfbfwma' (Vector BF16 widening mul-add)", 475 [FeatureStdExtZve32f]>; 476def HasStdExtZvfbfwma : Predicate<"Subtarget->hasStdExtZvfbfwma()">, 477 AssemblerPredicate<(all_of FeatureStdExtZvfbfwma), 478 "'Zvfbfwma' (Vector BF16 widening mul-add)">; 479 480def FeatureStdExtZvfh 481 : SubtargetFeature<"zvfh", "HasStdExtZvfh", "true", 482 "'Zvfh' (Vector Half-Precision Floating-Point)", 483 [FeatureStdExtZve32f, FeatureStdExtZfhmin]>; 484 485def HasVInstructionsF16 : Predicate<"Subtarget->hasVInstructionsF16()">; 486 487def HasStdExtZfhOrZvfh 488 : Predicate<"Subtarget->hasStdExtZfh() || Subtarget->hasStdExtZvfh()">, 489 AssemblerPredicate<(any_of FeatureStdExtZfh, FeatureStdExtZvfh), 490 "'Zfh' (Half-Precision Floating-Point) or " 491 "'Zvfh' (Vector Half-Precision Floating-Point)">; 492 493def FeatureStdExtZicbom 494 : SubtargetFeature<"zicbom", "HasStdExtZicbom", "true", 495 "'Zicbom' (Cache-Block Management Instructions)">; 496def HasStdExtZicbom : Predicate<"Subtarget->hasStdExtZicbom()">, 497 AssemblerPredicate<(all_of FeatureStdExtZicbom), 498 "'Zicbom' (Cache-Block Management Instructions)">; 499 500def FeatureStdExtZicboz 501 : SubtargetFeature<"zicboz", "HasStdExtZicboz", "true", 502 "'Zicboz' (Cache-Block Zero Instructions)">; 503def HasStdExtZicboz : Predicate<"Subtarget->hasStdExtZicboz()">, 504 AssemblerPredicate<(all_of FeatureStdExtZicboz), 505 "'Zicboz' (Cache-Block Zero Instructions)">; 506 507def FeatureStdExtZicbop 508 : SubtargetFeature<"zicbop", "HasStdExtZicbop", "true", 509 "'Zicbop' (Cache-Block Prefetch Instructions)">; 510def HasStdExtZicbop : Predicate<"Subtarget->hasStdExtZicbop()">, 511 AssemblerPredicate<(all_of FeatureStdExtZicbop), 512 "'Zicbop' (Cache-Block Prefetch Instructions)">; 513 514def FeatureStdExtSvnapot 515 : SubtargetFeature<"svnapot", "HasStdExtSvnapot", "true", 516 "'Svnapot' (NAPOT Translation Contiguity)">; 517 518def FeatureStdExtSvpbmt 519 : SubtargetFeature<"svpbmt", "HasStdExtSvpbmt", "true", 520 "'Svpbmt' (Page-Based Memory Types)">; 521 522def FeatureStdExtSvinval 523 : SubtargetFeature<"svinval", "HasStdExtSvinval", "true", 524 "'Svinval' (Fine-Grained Address-Translation Cache Invalidation)">; 525def HasStdExtSvinval : Predicate<"Subtarget->hasStdExtSvinval()">, 526 AssemblerPredicate<(all_of FeatureStdExtSvinval), 527 "'Svinval' (Fine-Grained Address-Translation Cache Invalidation)">; 528 529def FeatureStdExtZtso 530 : SubtargetFeature<"experimental-ztso", "HasStdExtZtso", "true", 531 "'Ztso' (Memory Model - Total Store Order)">; 532def HasStdExtZtso : Predicate<"Subtarget->hasStdExtZTso()">, 533 AssemblerPredicate<(all_of FeatureStdExtZtso), 534 "'Ztso' (Memory Model - Total Store Order)">; 535 536def FeatureStdExtZawrs : SubtargetFeature<"zawrs", "HasStdExtZawrs", "true", 537 "'Zawrs' (Wait on Reservation Set)">; 538def HasStdExtZawrs : Predicate<"Subtarget->hasStdExtZawrs()">, 539 AssemblerPredicate<(all_of FeatureStdExtZawrs), 540 "'Zawrs' (Wait on Reservation Set)">; 541 542def FeatureStdExtZvbb 543 : SubtargetFeature<"experimental-zvbb", "HasStdExtZvbb", "true", 544 "'Zvbb' (Vector Bit-manipulation used in Cryptography)">; 545def HasStdExtZvbb : Predicate<"Subtarget->hasStdExtZvbb()">, 546 AssemblerPredicate<(all_of FeatureStdExtZvbb), 547 "'Zvbb' (Vector Bit-manipulation used in Cryptography)">; 548 549def FeatureStdExtZvbc 550 : SubtargetFeature<"experimental-zvbc", "HasStdExtZvbc", "true", 551 "'Zvbc' (Vector Carryless Multiplication)">; 552def HasStdExtZvbc : Predicate<"Subtarget->hasStdExtZvbc()">, 553 AssemblerPredicate<(all_of FeatureStdExtZvbc), 554 "'Zvbc' (Vector Carryless Multiplication)">; 555 556def FeatureStdExtZvkg 557 : SubtargetFeature<"experimental-zvkg", "HasStdExtZvkg", "true", 558 "'Zvkg' (Vector GCM instructions for Cryptography)">; 559def HasStdExtZvkg : Predicate<"Subtarget->hasStdExtZvkg()">, 560 AssemblerPredicate<(all_of FeatureStdExtZvkg), 561 "'Zvkg' (Vector GCM instructions for Cryptography)">; 562 563def FeatureStdExtZvkn 564 : SubtargetFeature<"experimental-zvkn", "HasStdExtZvkn", "true", 565 "This extension is shorthand for the following set of " 566 "other extensions: Zvkned, Zvknhb, Zvbb, Zvbc, and Zvkt.">; 567 568def FeatureStdExtZvknc 569 : SubtargetFeature<"experimental-zvknc", "HasStdExtZvknc", "true", 570 "This extension is shorthand for the following set of " 571 "other extensions: Zvkn and Zvbc.">; 572 573def FeatureStdExtZvkned 574 : SubtargetFeature<"experimental-zvkned", "HasStdExtZvkned", "true", 575 "'Zvkned' (Vector AES Encryption & Decryption (Single Round))">; 576def HasStdExtZvkned : Predicate<"Subtarget->hasStdExtZvkned()">, 577 AssemblerPredicate<(all_of FeatureStdExtZvkned), 578 "'Zvkned' (Vector AES Encryption & Decryption (Single Round))">; 579 580def FeatureStdExtZvkng 581 : SubtargetFeature<"experimental-zvkng", "HasStdExtZvkng", "true", 582 "This extension is shorthand for the following set of " 583 "other extensions: Zvkn and Zvkg.">; 584 585def FeatureStdExtZvknha 586 : SubtargetFeature<"experimental-zvknha", "HasStdExtZvknha", "true", 587 "'Zvknha' (Vector SHA-2 (SHA-256 only))">; 588 589def FeatureStdExtZvknhb 590 : SubtargetFeature<"experimental-zvknhb", "HasStdExtZvknhb", "true", 591 "'Zvknhb' (Vector SHA-2 (SHA-256 and SHA-512))", 592 [FeatureStdExtZvknha]>; 593def HasStdExtZvknha : Predicate<"Subtarget->hasStdExtZvknha()">, 594 AssemblerPredicate<(all_of FeatureStdExtZvknha), 595 "'Zvknha' (Vector SHA-2 (SHA-256 only))">; 596 597def FeatureStdExtZvks 598 : SubtargetFeature<"experimental-zvks", "HasStdExtZvks", "true", 599 "This extension is shorthand for the following set of " 600 "other extensions: Zvksed, Zvksh, Zvbb, Zvbc, and Zvkt.">; 601 602def FeatureStdExtZvksc 603 : SubtargetFeature<"experimental-zvksc", "HasStdExtZvksc", "true", 604 "This extension is shorthand for the following set of " 605 "other extensions: Zvks and Zvbc.">; 606 607def FeatureStdExtZvksed 608 : SubtargetFeature<"experimental-zvksed", "HasStdExtZvksed", "true", 609 "'Zvksed' (SM4 Block Cipher Instructions)">; 610def HasStdExtZvksed : Predicate<"Subtarget->hasStdExtZvksed()">, 611 AssemblerPredicate<(all_of FeatureStdExtZvksed), 612 "'Zvksed' (SM4 Block Cipher Instructions)">; 613 614def FeatureStdExtZvksg 615 : SubtargetFeature<"experimental-zvksg", "HasStdExtZvksg", "true", 616 "This extension is shorthand for the following set of " 617 "other extensions: Zvks and Zvkg.">; 618 619def FeatureStdExtZvksh 620 : SubtargetFeature<"experimental-zvksh", "HasStdExtZvksh", "true", 621 "'Zvksh' (SM3 Hash Function Instructions)">; 622def HasStdExtZvksh : Predicate<"Subtarget->hasStdExtZvksh()">, 623 AssemblerPredicate<(all_of FeatureStdExtZvksh), 624 "'Zvksh' (SM3 Hash Function Instructions)">; 625 626def FeatureStdExtZvkt 627 : SubtargetFeature<"experimental-zvkt", "HasStdExtZvkt", "true", 628 "'Zvkt' (Vector Data-Independent Execution Latency)">; 629 630def FeatureStdExtZicond 631 : SubtargetFeature<"experimental-zicond", "HasStdExtZicond", "true", 632 "'Zicond' (Integer Conditional Operations)">; 633def HasStdExtZicond : Predicate<"Subtarget->hasStdExtZicond()">, 634 AssemblerPredicate<(all_of FeatureStdExtZicond), 635 "'Zicond' (Integer Conditional Operations)">; 636 637def FeatureStdExtSmaia 638 : SubtargetFeature<"experimental-smaia", "HasStdExtSmaia", "true", 639 "'Smaia' (Smaia encompasses all added CSRs and all " 640 "modifications to interrupt response behavior that the " 641 "AIA specifies for a hart, over all privilege levels.)", 642 []>; 643 644def FeatureStdExtSsaia 645 : SubtargetFeature<"experimental-ssaia", "HasStdExtSsaia", "true", 646 "'Ssaia' (Ssaia is essentially the same as Smaia except " 647 "excluding the machine-level CSRs and behavior not " 648 "directly visible to supervisor level.)", []>; 649 650def FeatureStdExtZfbfmin 651 : SubtargetFeature<"experimental-zfbfmin", "HasStdExtZfbfmin", "true", 652 "'Zfbfmin' (Scalar BF16 Converts)", 653 [FeatureStdExtF]>; 654def HasStdExtZfbfmin : Predicate<"Subtarget->hasStdExtZfbfmin()">, 655 AssemblerPredicate<(all_of FeatureStdExtZfbfmin), 656 "'Zfbfmin' (Scalar BF16 Converts)">; 657 658def HasHalfFPLoadStoreMove 659 : Predicate<"Subtarget->hasHalfFPLoadStoreMove()">, 660 AssemblerPredicate<(any_of FeatureStdExtZfh, FeatureStdExtZfhmin, 661 FeatureStdExtZfbfmin, FeatureStdExtZvfbfwma), 662 "'Zfh' (Half-Precision Floating-Point) or " 663 "'Zfhmin' (Half-Precision Floating-Point Minimal) or " 664 "'Zfbfmin' (Scalar BF16 Converts) or " 665 "'Zvfbfwma' (Vector BF16 widening mul-add)">; 666 667def FeatureStdExtZacas 668 : SubtargetFeature<"experimental-zacas", "HasStdExtZacas", "true", 669 "'Zacas' (Atomic Compare-And-Swap Instructions)">; 670def HasStdExtZacas : Predicate<"Subtarget->hasStdExtZacas()">, 671 AssemblerPredicate<(all_of FeatureStdExtZacas), 672 "'Zacas' (Atomic Compare-And-Swap Instructions)">; 673 674//===----------------------------------------------------------------------===// 675// Vendor extensions 676//===----------------------------------------------------------------------===// 677 678def FeatureVendorXVentanaCondOps 679 : SubtargetFeature<"xventanacondops", "HasVendorXVentanaCondOps", "true", 680 "'XVentanaCondOps' (Ventana Conditional Ops)">; 681def HasVendorXVentanaCondOps : Predicate<"Subtarget->hasVendorXVentanaCondOps()">, 682 AssemblerPredicate<(all_of FeatureVendorXVentanaCondOps), 683 "'XVentanaCondOps' (Ventana Conditional Ops)">; 684 685def FeatureVendorXTHeadBa 686 : SubtargetFeature<"xtheadba", "HasVendorXTHeadBa", "true", 687 "'xtheadba' (T-Head address calculation instructions)">; 688def HasVendorXTHeadBa : Predicate<"Subtarget->hasVendorXTHeadBa()">, 689 AssemblerPredicate<(all_of FeatureVendorXTHeadBa), 690 "'xtheadba' (T-Head address calculation instructions)">; 691 692def FeatureVendorXTHeadBb 693 : SubtargetFeature<"xtheadbb", "HasVendorXTHeadBb", "true", 694 "'xtheadbb' (T-Head basic bit-manipulation instructions)">; 695def HasVendorXTHeadBb : Predicate<"Subtarget->hasVendorXTHeadBb()">, 696 AssemblerPredicate<(all_of FeatureVendorXTHeadBb), 697 "'xtheadbb' (T-Head basic bit-manipulation instructions)">; 698 699def FeatureVendorXTHeadBs 700 : SubtargetFeature<"xtheadbs", "HasVendorXTHeadBs", "true", 701 "'xtheadbs' (T-Head single-bit instructions)">; 702def HasVendorXTHeadBs : Predicate<"Subtarget->hasVendorXTHeadBs()">, 703 AssemblerPredicate<(all_of FeatureVendorXTHeadBs), 704 "'xtheadbs' (T-Head single-bit instructions)">; 705 706def FeatureVendorXTHeadCondMov 707 : SubtargetFeature<"xtheadcondmov", "HasVendorXTHeadCondMov", "true", 708 "'xtheadcondmov' (T-Head conditional move instructions)">; 709def HasVendorXTHeadCondMov : Predicate<"Subtarget->hasVendorXTHeadCondMov()">, 710 AssemblerPredicate<(all_of FeatureVendorXTHeadCondMov), 711 "'xtheadcondmov' (T-Head conditional move instructions)">; 712 713def FeatureVendorXTHeadCmo 714 : SubtargetFeature<"xtheadcmo", "HasVendorXTHeadCmo", "true", 715 "'xtheadcmo' (T-Head cache management instructions)">; 716def HasVendorXTHeadCmo : Predicate<"Subtarget->hasVendorXTHeadCmo()">, 717 AssemblerPredicate<(all_of FeatureVendorXTHeadCmo), 718 "'xtheadcmo' (T-Head cache management instructions)">; 719 720def FeatureVendorXTHeadFMemIdx 721 : SubtargetFeature<"xtheadfmemidx", "HasVendorXTHeadFMemIdx", "true", 722 "'xtheadfmemidx' (T-Head FP Indexed Memory Operations)", 723 [FeatureStdExtF]>; 724def HasVendorXTHeadFMemIdx : Predicate<"Subtarget->hasVendorXTHeadFMemIdx()">, 725 AssemblerPredicate<(all_of FeatureVendorXTHeadFMemIdx), 726 "'xtheadfmemidx' (T-Head FP Indexed Memory Operations)">; 727 728def FeatureVendorXTHeadMac 729 : SubtargetFeature<"xtheadmac", "HasVendorXTHeadMac", "true", 730 "'xtheadmac' (T-Head Multiply-Accumulate Instructions)">; 731def HasVendorXTHeadMac : Predicate<"Subtarget->hasVendorXTHeadMac()">, 732 AssemblerPredicate<(all_of FeatureVendorXTHeadMac), 733 "'xtheadmac' (T-Head Multiply-Accumulate Instructions)">; 734 735def FeatureVendorXTHeadMemIdx 736 : SubtargetFeature<"xtheadmemidx", "HasVendorXTHeadMemIdx", "true", 737 "'xtheadmemidx' (T-Head Indexed Memory Operations)">; 738def HasVendorXTHeadMemIdx : Predicate<"Subtarget->hasVendorXTHeadMemIdx()">, 739 AssemblerPredicate<(all_of FeatureVendorXTHeadMemIdx), 740 "'xtheadmemidx' (T-Head Indexed Memory Operations)">; 741 742def FeatureVendorXTHeadMemPair 743 : SubtargetFeature<"xtheadmempair", "HasVendorXTHeadMemPair", "true", 744 "'xtheadmempair' (T-Head two-GPR Memory Operations)">; 745def HasVendorXTHeadMemPair : Predicate<"Subtarget->hasVendorXTHeadMemPair()">, 746 AssemblerPredicate<(all_of FeatureVendorXTHeadMemPair), 747 "'xtheadmempair' (T-Head two-GPR Memory Operations)">; 748 749def FeatureVendorXTHeadSync 750 : SubtargetFeature<"xtheadsync", "HasVendorXTHeadSync", "true", 751 "'xtheadsync' (T-Head multicore synchronization instructions)">; 752def HasVendorXTHeadSync : Predicate<"Subtarget->hasVendorXTHeadSync()">, 753 AssemblerPredicate<(all_of FeatureVendorXTHeadSync), 754 "'xtheadsync' (T-Head multicore synchronization instructions)">; 755 756def FeatureVendorXTHeadVdot 757 : SubtargetFeature<"xtheadvdot", "HasVendorXTHeadVdot", "true", 758 "'xtheadvdot' (T-Head Vector Extensions for Dot)", 759 [FeatureStdExtV]>; 760def HasVendorXTHeadVdot : Predicate<"Subtarget->hasVendorXTHeadVdot()">, 761 AssemblerPredicate<(all_of FeatureVendorXTHeadVdot), 762 "'xtheadvdot' (T-Head Vector Extensions for Dot)">; 763 764def FeatureVendorXSfvcp 765 : SubtargetFeature<"xsfvcp", "HasVendorXSfvcp", "true", 766 "'XSfvcp' (SiFive Custom Vector Coprocessor Interface Instructions)", 767 [FeatureStdExtZve32x]>; 768def HasVendorXSfvcp : Predicate<"Subtarget->hasVendorXSfvcp()">, 769 AssemblerPredicate<(all_of FeatureVendorXSfvcp), 770 "'XSfvcp' (SiFive Custom Vector Coprocessor Interface Instructions)">; 771 772def FeatureVendorXSfcie 773 : SubtargetFeature<"xsfcie", "HasVendorXSfcie", "true", 774 "'XSfcie' (SiFive Custom Instruction Extension SCIE.)">; 775def HasVendorXSfcie : Predicate<"Subtarget->hasVendorXSfcie()">, 776 AssemblerPredicate<(all_of FeatureVendorXSfcie), 777 "'XSfcie' (SiFive Custom Instruction Extension SCIE.)">; 778 779def FeatureVendorXCVbitmanip 780 : SubtargetFeature<"xcvbitmanip", "HasVendorXCVbitmanip", "true", 781 "'XCVbitmanip' (CORE-V Bit Manipulation)">; 782def HasVendorXCVbitmanip : Predicate<"Subtarget->hasVendorXCVbitmanip()">, 783 AssemblerPredicate<(all_of FeatureVendorXCVbitmanip), 784 "'XCVbitmanip' (CORE-V Bit Manipulation)">; 785 786def FeatureVendorXCVmac 787 : SubtargetFeature<"xcvmac", "HasVendorXCVmac", "true", 788 "'XCVmac' (CORE-V Multiply-Accumulate)">; 789def HasVendorXCVmac : Predicate<"Subtarget->hasVendorXCVmac()">, 790 AssemblerPredicate<(all_of FeatureVendorXCVmac), 791 "'XCVmac' (CORE-V Multiply-Accumulate)">; 792 793//===----------------------------------------------------------------------===// 794// LLVM specific features and extensions 795//===----------------------------------------------------------------------===// 796 797// Feature32Bit exists to mark CPUs that support RV32 to distinquish them from 798// tuning CPU names. 799def Feature32Bit 800 : SubtargetFeature<"32bit", "IsRV32", "true", "Implements RV32">; 801def Feature64Bit 802 : SubtargetFeature<"64bit", "IsRV64", "true", "Implements RV64">; 803def IsRV64 : Predicate<"Subtarget->is64Bit()">, 804 AssemblerPredicate<(all_of Feature64Bit), 805 "RV64I Base Instruction Set">; 806def IsRV32 : Predicate<"!Subtarget->is64Bit()">, 807 AssemblerPredicate<(all_of (not Feature64Bit)), 808 "RV32I Base Instruction Set">; 809 810defvar RV32 = DefaultMode; 811def RV64 : HwMode<"+64bit", [IsRV64]>; 812 813def FeatureRVE 814 : SubtargetFeature<"e", "IsRVE", "true", 815 "Implements RV{32,64}E (provides 16 rather than 32 GPRs)">; 816def IsRVE : Predicate<"Subtarget->isRVE()">, 817 AssemblerPredicate<(all_of FeatureRVE)>; 818 819def FeatureRelax 820 : SubtargetFeature<"relax", "EnableLinkerRelax", "true", 821 "Enable Linker relaxation.">; 822 823foreach i = {1-31} in 824 def FeatureReserveX#i : 825 SubtargetFeature<"reserve-x"#i, "UserReservedRegister[RISCV::X"#i#"]", 826 "true", "Reserve X"#i>; 827 828def FeatureSaveRestore : SubtargetFeature<"save-restore", "EnableSaveRestore", 829 "true", "Enable save/restore.">; 830 831def FeatureTrailingSeqCstFence : SubtargetFeature<"seq-cst-trailing-fence", 832 "EnableSeqCstTrailingFence", 833 "true", 834 "Enable trailing fence for seq-cst store.">; 835 836def FeatureUnalignedScalarMem 837 : SubtargetFeature<"unaligned-scalar-mem", "EnableUnalignedScalarMem", 838 "true", "Has reasonably performant unaligned scalar " 839 "loads and stores">; 840 841def FeatureUnalignedVectorMem 842 : SubtargetFeature<"unaligned-vector-mem", "EnableUnalignedVectorMem", 843 "true", "Has reasonably performant unaligned vector " 844 "loads and stores">; 845 846def TuneNoOptimizedZeroStrideLoad 847 : SubtargetFeature<"no-optimized-zero-stride-load", "HasOptimizedZeroStrideLoad", 848 "false", "Hasn't optimized (perform fewer memory operations)" 849 "zero-stride vector load">; 850 851// Some vector hardware implementations do not process all VLEN bits in parallel 852// and instead split over multiple cycles. DLEN refers to the datapath width 853// that can be done in parallel. 854def TuneDLenFactor2 855 : SubtargetFeature<"dlen-factor-2", "DLenFactor2", "true", 856 "Vector unit DLEN(data path width) is half of VLEN">; 857 858def TuneLUIADDIFusion 859 : SubtargetFeature<"lui-addi-fusion", "HasLUIADDIFusion", 860 "true", "Enable LUI+ADDI macrofusion">; 861 862def TuneNoDefaultUnroll 863 : SubtargetFeature<"no-default-unroll", "EnableDefaultUnroll", "false", 864 "Disable default unroll preference.">; 865 866// SiFive 7 is able to fuse integer ALU operations with a preceding branch 867// instruction. 868def TuneShortForwardBranchOpt 869 : SubtargetFeature<"short-forward-branch-opt", "HasShortForwardBranchOpt", 870 "true", "Enable short forward branch optimization">; 871def HasShortForwardBranchOpt : Predicate<"Subtarget->hasShortForwardBranchOpt()">; 872def NoShortForwardBranchOpt : Predicate<"!Subtarget->hasShortForwardBranchOpt()">; 873 874def TuneSiFive7 : SubtargetFeature<"sifive7", "RISCVProcFamily", "SiFive7", 875 "SiFive 7-Series processors", 876 [TuneNoDefaultUnroll, 877 TuneShortForwardBranchOpt]>; 878 879// Assume that lock-free native-width atomics are available, even if the target 880// and operating system combination would not usually provide them. The user 881// is responsible for providing any necessary __sync implementations. Code 882// built with this feature is not ABI-compatible with code built without this 883// feature, if atomic variables are exposed across the ABI boundary. 884def FeatureForcedAtomics : SubtargetFeature< 885 "forced-atomics", "HasForcedAtomics", "true", 886 "Assume that lock-free native-width atomics are available">; 887def HasAtomicLdSt 888 : Predicate<"Subtarget->hasStdExtA() || Subtarget->hasForcedAtomics()">; 889 890def FeatureTaggedGlobals : SubtargetFeature<"tagged-globals", 891 "AllowTaggedGlobals", 892 "true", "Use an instruction sequence for taking the address of a global " 893 "that allows a memory tag in the upper address bits">; 894