clang/lib/Basic/Targets/RISCV.h

   1 //===--- RISCV.h - Declare RISC-V target feature support --------*- 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 declares RISC-V TargetInfo objects.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_CLANG_LIB_BASIC_TARGETS_RISCV_H
  14 #define LLVM_CLANG_LIB_BASIC_TARGETS_RISCV_H
  15
  16 #include "clang/Basic/TargetInfo.h"
  17 #include "clang/Basic/TargetOptions.h"
  18 #include "llvm/Support/Compiler.h"
  19 #include "llvm/Support/RISCVISAInfo.h"
  20 #include "llvm/TargetParser/Triple.h"
  21 #include <optional>
  22
  23 namespace clang {
  24 namespace targets {
  25
  26 // RISC-V Target
  27 class RISCVTargetInfo : public TargetInfo {
  28 protected:
  29   std::string ABI, CPU;
  30   std::unique_ptr<llvm::RISCVISAInfo> ISAInfo;
  31
  32 public:
  33   RISCVTargetInfo(const llvm::Triple &Triple, const TargetOptions &)
  34       : TargetInfo(Triple) {
  35     LongDoubleWidth = 128;
  36     LongDoubleAlign = 128;
  37     LongDoubleFormat = &llvm::APFloat::IEEEquad();
  38     SuitableAlign = 128;
  39     WCharType = SignedInt;
  40     WIntType = UnsignedInt;
  41     HasRISCVVTypes = true;
  42     MCountName = "_mcount";
  43     HasFloat16 = true;
  44     HasStrictFP = true;
  45   }
  46
  47   bool setCPU(const std::string &Name) override {
  48     if (!isValidCPUName(Name))
  49       return false;
  50     CPU = Name;
  51     return true;
  52   }
  53
  54   StringRef getABI() const override { return ABI; }
  55   void getTargetDefines(const LangOptions &Opts,
  56                         MacroBuilder &Builder) const override;
  57
  58   ArrayRef<Builtin::Info> getTargetBuiltins() const override;
  59
  60   BuiltinVaListKind getBuiltinVaListKind() const override {
  61     return TargetInfo::VoidPtrBuiltinVaList;
  62   }
  63
  64   std::string_view getClobbers() const override { return ""; }
  65
  66   StringRef getConstraintRegister(StringRef Constraint,
  67                                   StringRef Expression) const override {
  68     return Expression;
  69   }
  70
  71   ArrayRef<const char *> getGCCRegNames() const override;
  72
  73   int getEHDataRegisterNumber(unsigned RegNo) const override {
  74     if (RegNo == 0)
  75       return 10;
  76     else if (RegNo == 1)
  77       return 11;
  78     else
  79       return -1;
  80   }
  81
  82   ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override;
  83
  84   bool validateAsmConstraint(const char *&Name,
  85                              TargetInfo::ConstraintInfo &Info) const override;
  86
  87   std::string convertConstraint(const char *&Constraint) const override;
  88
  89   bool
  90   initFeatureMap(llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags,
  91                  StringRef CPU,
  92                  const std::vector<std::string> &FeaturesVec) const override;
  93
  94   std::optional<std::pair<unsigned, unsigned>>
  95   getVScaleRange(const LangOptions &LangOpts) const override;
  96
  97   bool hasFeature(StringRef Feature) const override;
  98
  99   bool handleTargetFeatures(std::vector<std::string> &Features,
 100                             DiagnosticsEngine &Diags) override;
 101
 102   bool hasBitIntType() const override { return true; }
 103
 104   bool useFP16ConversionIntrinsics() const override {
 105     return false;
 106   }
 107
 108   bool isValidCPUName(StringRef Name) const override;
 109   void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const override;
 110   bool isValidTuneCPUName(StringRef Name) const override;
 111   void fillValidTuneCPUList(SmallVectorImpl<StringRef> &Values) const override;
 112 };
 113 class LLVM_LIBRARY_VISIBILITY RISCV32TargetInfo : public RISCVTargetInfo {
 114 public:
 115   RISCV32TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
 116       : RISCVTargetInfo(Triple, Opts) {
 117     IntPtrType = SignedInt;
 118     PtrDiffType = SignedInt;
 119     SizeType = UnsignedInt;
 120     resetDataLayout("e-m:e-p:32:32-i64:64-n32-S128");
 121   }
 122
 123   bool setABI(const std::string &Name) override {
 124     if (Name == "ilp32" || Name == "ilp32f" || Name == "ilp32d") {
 125       ABI = Name;
 126       return true;
 127     }
 128     return false;
 129   }
 130
 131   void setMaxAtomicWidth() override {
 132     MaxAtomicPromoteWidth = 128;
 133
 134     if (ISAInfo->hasExtension("a"))
 135       MaxAtomicInlineWidth = 32;
 136   }
 137 };
 138 class LLVM_LIBRARY_VISIBILITY RISCV64TargetInfo : public RISCVTargetInfo {
 139 public:
 140   RISCV64TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
 141       : RISCVTargetInfo(Triple, Opts) {
 142     LongWidth = LongAlign = PointerWidth = PointerAlign = 64;
 143     IntMaxType = Int64Type = SignedLong;
 144     resetDataLayout("e-m:e-p:64:64-i64:64-i128:128-n32:64-S128");
 145   }
 146
 147   bool setABI(const std::string &Name) override {
 148     if (Name == "lp64" || Name == "lp64f" || Name == "lp64d") {
 149       ABI = Name;
 150       return true;
 151     }
 152     return false;
 153   }
 154
 155   void setMaxAtomicWidth() override {
 156     MaxAtomicPromoteWidth = 128;
 157
 158     if (ISAInfo->hasExtension("a"))
 159       MaxAtomicInlineWidth = 64;
 160   }
 161 };
 162 } // namespace targets
 163 } // namespace clang
 164
 165 #endif // LLVM_CLANG_LIB_BASIC_TARGETS_RISCV_H