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_RCPC)
  92     Features.push_back("+rcpc");
  93
  94   return true;
  95 }
  96
  97 bool AArch64::getArchFeatures(AArch64::ArchKind AK,
  98                               std::vector<StringRef> &Features) {
  99   if (AK == ArchKind::ARMV8_1A)
 100     Features.push_back("+v8.1a");
 101   if (AK == ArchKind::ARMV8_2A)
 102     Features.push_back("+v8.2a");
 103   if (AK == ArchKind::ARMV8_3A)
 104     Features.push_back("+v8.3a");
 105   if (AK == ArchKind::ARMV8_4A)
 106     Features.push_back("+v8.4a");
 107   if (AK == ArchKind::ARMV8_5A)
 108     Features.push_back("+v8.5a");
 109
 110   return AK != ArchKind::INVALID;
 111 }
 112
 113 StringRef AArch64::getArchName(AArch64::ArchKind AK) {
 114   return AArch64ARCHNames[static_cast<unsigned>(AK)].getName();
 115 }
 116
 117 StringRef AArch64::getCPUAttr(AArch64::ArchKind AK) {
 118   return AArch64ARCHNames[static_cast<unsigned>(AK)].getCPUAttr();
 119 }
 120
 121 StringRef AArch64::getSubArch(AArch64::ArchKind AK) {
 122   return AArch64ARCHNames[static_cast<unsigned>(AK)].getSubArch();
 123 }
 124
 125 unsigned AArch64::getArchAttr(AArch64::ArchKind AK) {
 126   return AArch64ARCHNames[static_cast<unsigned>(AK)].ArchAttr;
 127 }
 128
 129 StringRef AArch64::getArchExtName(unsigned ArchExtKind) {
 130   for (const auto &AE : AArch64ARCHExtNames)
 131     if (ArchExtKind == AE.ID)
 132       return AE.getName();
 133   return StringRef();
 134 }
 135
 136 StringRef AArch64::getArchExtFeature(StringRef ArchExt) {
 137   if (ArchExt.startswith("no")) {
 138     StringRef ArchExtBase(ArchExt.substr(2));
 139     for (const auto &AE : AArch64ARCHExtNames) {
 140       if (AE.NegFeature && ArchExtBase == AE.getName())
 141         return StringRef(AE.NegFeature);
 142     }
 143   }
 144
 145   for (const auto &AE : AArch64ARCHExtNames)
 146     if (AE.Feature && ArchExt == AE.getName())
 147       return StringRef(AE.Feature);
 148   return StringRef();
 149 }
 150
 151 StringRef AArch64::getDefaultCPU(StringRef Arch) {
 152   ArchKind AK = parseArch(Arch);
 153   if (AK == ArchKind::INVALID)
 154     return StringRef();
 155
 156   // Look for multiple AKs to find the default for pair AK+Name.
 157   for (const auto &CPU : AArch64CPUNames)
 158     if (CPU.ArchID == AK && CPU.Default)
 159       return CPU.getName();
 160
 161   // If we can't find a default then target the architecture instead
 162   return "generic";
 163 }
 164
 165 void AArch64::fillValidCPUArchList(SmallVectorImpl<StringRef> &Values) {
 166   for (const auto &Arch : AArch64CPUNames) {
 167     if (Arch.ArchID != ArchKind::INVALID)
 168       Values.push_back(Arch.getName());
 169   }
 170 }
 171
 172 bool AArch64::isX18ReservedByDefault(const Triple &TT) {
 173   return TT.isAndroid() || TT.isOSDarwin() || TT.isOSFuchsia() ||
 174          TT.isOSWindows();
 175 }
 176
 177 // Allows partial match, ex. "v8a" matches "armv8a".
 178 AArch64::ArchKind AArch64::parseArch(StringRef Arch) {
 179   Arch = ARM::getCanonicalArchName(Arch);
 180   if (checkArchVersion(Arch) < 8)
 181     return ArchKind::INVALID;
 182
 183   StringRef Syn = ARM::getArchSynonym(Arch);
 184   for (const auto A : AArch64ARCHNames) {
 185     if (A.getName().endswith(Syn))
 186       return A.ID;
 187   }
 188   return ArchKind::INVALID;
 189 }
 190
 191 AArch64::ArchExtKind AArch64::parseArchExt(StringRef ArchExt) {
 192   for (const auto A : AArch64ARCHExtNames) {
 193     if (ArchExt == A.getName())
 194       return static_cast<ArchExtKind>(A.ID);
 195   }
 196   return AArch64::AEK_INVALID;
 197 }
 198
 199 AArch64::ArchKind AArch64::parseCPUArch(StringRef CPU) {
 200   for (const auto C : AArch64CPUNames) {
 201     if (CPU == C.getName())
 202       return C.ArchID;
 203   }
 204   return ArchKind::INVALID;
 205 }