lib/Support/AArch64TargetParser.cpp

   1 //===-- AArch64TargetParser - Parser for AArch64 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 AArch64 hardware features
  10 // such as FPU/CPU/ARCH and extension names.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "llvm/Support/AArch64TargetParser.h"
  15 #include "llvm/ADT/StringRef.h"
  16 #include "llvm/ADT/StringSwitch.h"
  17 #include <cctype>
  18
  19 using namespace llvm;
  20
  21 static unsigned checkArchVersion(llvm::StringRef Arch) {
  22   if (Arch.size() >= 2 && Arch[0] == 'v' && std::isdigit(Arch[1]))
  23     return (Arch[1] - 48);
  24   return 0;
  25 }
  26
  27 unsigned AArch64::getDefaultFPU(StringRef CPU, AArch64::ArchKind AK) {
  28   if (CPU == "generic")
  29     return AArch64ARCHNames[static_cast<unsigned>(AK)].DefaultFPU;
  30
  31   return StringSwitch<unsigned>(CPU)
  32 #define AARCH64_CPU_NAME(NAME, ID, DEFAULT_FPU, IS_DEFAULT, DEFAULT_EXT)       \
  33   .Case(NAME, ARM::DEFAULT_FPU)
  34 #include "../../include/llvm/Support/AArch64TargetParser.def"
  35   .Default(ARM::FK_INVALID);
  36 }
  37
  38 unsigned AArch64::getDefaultExtensions(StringRef CPU, AArch64::ArchKind AK) {
  39   if (CPU == "generic")
  40     return AArch64ARCHNames[static_cast<unsigned>(AK)].ArchBaseExtensions;
  41
  42   return StringSwitch<unsigned>(CPU)
  43 #define AARCH64_CPU_NAME(NAME, ID, DEFAULT_FPU, IS_DEFAULT, DEFAULT_EXT)       \
  44   .Case(NAME, AArch64ARCHNames[static_cast<unsigned>(ArchKind::ID)]            \
  45                       .ArchBaseExtensions |                                    \
  46                   DEFAULT_EXT)
  47 #include "../../include/llvm/Support/AArch64TargetParser.def"
  48   .Default(AArch64::AEK_INVALID);
  49 }
  50
  51 AArch64::ArchKind AArch64::getCPUArchKind(StringRef CPU) {
  52   if (CPU == "generic")
  53     return ArchKind::ARMV8A;
  54
  55   return StringSwitch<AArch64::ArchKind>(CPU)
  56 #define AARCH64_CPU_NAME(NAME, ID, DEFAULT_FPU, IS_DEFAULT, DEFAULT_EXT)       \
  57   .Case(NAME, ArchKind::ID)
  58 #include "../../include/llvm/Support/AArch64TargetParser.def"
  59   .Default(ArchKind::INVALID);
  60 }
  61
  62 bool AArch64::getExtensionFeatures(unsigned Extensions,
  63                                    std::vector<StringRef> &Features) {
  64   if (Extensions == AArch64::AEK_INVALID)
  65     return false;
  66
  67   if (Extensions & AEK_FP)
  68     Features.push_back("+fp-armv8");
  69   if (Extensions & AEK_SIMD)
  70     Features.push_back("+neon");
  71   if (Extensions & AEK_CRC)
  72     Features.push_back("+crc");
  73   if (Extensions & AEK_CRYPTO)
  74     Features.push_back("+crypto");
  75   if (Extensions & AEK_DOTPROD)
  76     Features.push_back("+dotprod");
  77   if (Extensions & AEK_FP16FML)
  78     Features.push_back("+fp16fml");
  79   if (Extensions & AEK_FP16)
  80     Features.push_back("+fullfp16");
  81   if (Extensions & AEK_PROFILE)
  82     Features.push_back("+spe");
  83   if (Extensions & AEK_RAS)
  84     Features.push_back("+ras");
  85   if (Extensions & AEK_LSE)
  86     Features.push_back("+lse");
  87   if (Extensions & AEK_RDM)
  88     Features.push_back("+rdm");
  89   if (Extensions & AEK_SVE)
  90     Features.push_back("+sve");
  91   if (Extensions & AEK_SVE2)
  92     Features.push_back("+sve2");
  93   if (Extensions & AEK_SVE2AES)
  94     Features.push_back("+sve2-aes");
  95   if (Extensions & AEK_SVE2SM4)
  96     Features.push_back("+sve2-sm4");
  97   if (Extensions & AEK_SVE2SHA3)
  98     Features.push_back("+sve2-sha3");
  99   if (Extensions & AEK_SVE2BITPERM)
 100     Features.push_back("+sve2-bitperm");
 101   if (Extensions & AEK_RCPC)
 102     Features.push_back("+rcpc");
 103
 104   return true;
 105 }
 106
 107 bool AArch64::getArchFeatures(AArch64::ArchKind AK,
 108                               std::vector<StringRef> &Features) {
 109   if (AK == ArchKind::ARMV8_1A)
 110     Features.push_back("+v8.1a");
 111   if (AK == ArchKind::ARMV8_2A)
 112     Features.push_back("+v8.2a");
 113   if (AK == ArchKind::ARMV8_3A)
 114     Features.push_back("+v8.3a");
 115   if (AK == ArchKind::ARMV8_4A)
 116     Features.push_back("+v8.4a");
 117   if (AK == ArchKind::ARMV8_5A)
 118     Features.push_back("+v8.5a");
 119
 120   return AK != ArchKind::INVALID;
 121 }
 122
 123 StringRef AArch64::getArchName(AArch64::ArchKind AK) {
 124   return AArch64ARCHNames[static_cast<unsigned>(AK)].getName();
 125 }
 126
 127 StringRef AArch64::getCPUAttr(AArch64::ArchKind AK) {
 128   return AArch64ARCHNames[static_cast<unsigned>(AK)].getCPUAttr();
 129 }
 130
 131 StringRef AArch64::getSubArch(AArch64::ArchKind AK) {
 132   return AArch64ARCHNames[static_cast<unsigned>(AK)].getSubArch();
 133 }
 134
 135 unsigned AArch64::getArchAttr(AArch64::ArchKind AK) {
 136   return AArch64ARCHNames[static_cast<unsigned>(AK)].ArchAttr;
 137 }
 138
 139 StringRef AArch64::getArchExtName(unsigned ArchExtKind) {
 140   for (const auto &AE : AArch64ARCHExtNames)
 141     if (ArchExtKind == AE.ID)
 142       return AE.getName();
 143   return StringRef();
 144 }
 145
 146 StringRef AArch64::getArchExtFeature(StringRef ArchExt) {
 147   if (ArchExt.startswith("no")) {
 148     StringRef ArchExtBase(ArchExt.substr(2));
 149     for (const auto &AE : AArch64ARCHExtNames) {
 150       if (AE.NegFeature && ArchExtBase == AE.getName())
 151         return StringRef(AE.NegFeature);
 152     }
 153   }
 154
 155   for (const auto &AE : AArch64ARCHExtNames)
 156     if (AE.Feature && ArchExt == AE.getName())
 157       return StringRef(AE.Feature);
 158   return StringRef();
 159 }
 160
 161 StringRef AArch64::getDefaultCPU(StringRef Arch) {
 162   ArchKind AK = parseArch(Arch);
 163   if (AK == ArchKind::INVALID)
 164     return StringRef();
 165
 166   // Look for multiple AKs to find the default for pair AK+Name.
 167   for (const auto &CPU : AArch64CPUNames)
 168     if (CPU.ArchID == AK && CPU.Default)
 169       return CPU.getName();
 170
 171   // If we can't find a default then target the architecture instead
 172   return "generic";
 173 }
 174
 175 void AArch64::fillValidCPUArchList(SmallVectorImpl<StringRef> &Values) {
 176   for (const auto &Arch : AArch64CPUNames) {
 177     if (Arch.ArchID != ArchKind::INVALID)
 178       Values.push_back(Arch.getName());
 179   }
 180 }
 181
 182 bool AArch64::isX18ReservedByDefault(const Triple &TT) {
 183   return TT.isAndroid() || TT.isOSDarwin() || TT.isOSFuchsia() ||
 184          TT.isOSWindows();
 185 }
 186
 187 // Allows partial match, ex. "v8a" matches "armv8a".
 188 AArch64::ArchKind AArch64::parseArch(StringRef Arch) {
 189   Arch = ARM::getCanonicalArchName(Arch);
 190   if (checkArchVersion(Arch) < 8)
 191     return ArchKind::INVALID;
 192
 193   StringRef Syn = ARM::getArchSynonym(Arch);
 194   for (const auto A : AArch64ARCHNames) {
 195     if (A.getName().endswith(Syn))
 196       return A.ID;
 197   }
 198   return ArchKind::INVALID;
 199 }
 200
 201 AArch64::ArchExtKind AArch64::parseArchExt(StringRef ArchExt) {
 202   for (const auto A : AArch64ARCHExtNames) {
 203     if (ArchExt == A.getName())
 204       return static_cast<ArchExtKind>(A.ID);
 205   }
 206   return AArch64::AEK_INVALID;
 207 }
 208
 209 AArch64::ArchKind AArch64::parseCPUArch(StringRef CPU) {
 210   for (const auto C : AArch64CPUNames) {
 211     if (CPU == C.getName())
 212       return C.ArchID;
 213   }
 214   return ArchKind::INVALID;
 215 }