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
23namespace clang {
24namespace targets {
25
26// RISC-V Target
27class RISCVTargetInfo : public TargetInfo {
28protected:
29  std::string ABI, CPU;
30  std::unique_ptr<llvm::RISCVISAInfo> ISAInfo;
31
32private:
33  bool FastUnalignedAccess;
34  bool HasExperimental = false;
35
36public:
37  RISCVTargetInfo(const llvm::Triple &Triple, const TargetOptions &)
38      : TargetInfo(Triple) {
39    BFloat16Width = 16;
40    BFloat16Align = 16;
41    BFloat16Format = &llvm::APFloat::BFloat();
42    LongDoubleWidth = 128;
43    LongDoubleAlign = 128;
44    LongDoubleFormat = &llvm::APFloat::IEEEquad();
45    SuitableAlign = 128;
46    WCharType = SignedInt;
47    WIntType = UnsignedInt;
48    HasRISCVVTypes = true;
49    MCountName = "_mcount";
50    HasFloat16 = true;
51    HasStrictFP = true;
52  }
53
54  bool setCPU(const std::string &Name) override {
55    if (!isValidCPUName(Name))
56      return false;
57    CPU = Name;
58    return true;
59  }
60
61  StringRef getABI() const override { return ABI; }
62  void getTargetDefines(const LangOptions &Opts,
63                        MacroBuilder &Builder) const override;
64
65  ArrayRef<Builtin::Info> getTargetBuiltins() const override;
66
67  BuiltinVaListKind getBuiltinVaListKind() const override {
68    return TargetInfo::VoidPtrBuiltinVaList;
69  }
70
71  std::string_view getClobbers() const override { return ""; }
72
73  StringRef getConstraintRegister(StringRef Constraint,
74                                  StringRef Expression) const override {
75    return Expression;
76  }
77
78  ArrayRef<const char *> getGCCRegNames() const override;
79
80  int getEHDataRegisterNumber(unsigned RegNo) const override {
81    if (RegNo == 0)
82      return 10;
83    else if (RegNo == 1)
84      return 11;
85    else
86      return -1;
87  }
88
89  ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override;
90
91  bool validateAsmConstraint(const char *&Name,
92                             TargetInfo::ConstraintInfo &Info) const override;
93
94  std::string convertConstraint(const char *&Constraint) const override;
95
96  bool
97  initFeatureMap(llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags,
98                 StringRef CPU,
99                 const std::vector<std::string> &FeaturesVec) const override;
100
101  std::optional<std::pair<unsigned, unsigned>>
102  getVScaleRange(const LangOptions &LangOpts) const override;
103
104  bool hasFeature(StringRef Feature) const override;
105
106  bool handleTargetFeatures(std::vector<std::string> &Features,
107                            DiagnosticsEngine &Diags) override;
108
109  bool hasBitIntType() const override { return true; }
110
111  bool hasBFloat16Type() const override { return true; }
112
113  bool useFP16ConversionIntrinsics() const override {
114    return false;
115  }
116
117  bool isValidCPUName(StringRef Name) const override;
118  void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const override;
119  bool isValidTuneCPUName(StringRef Name) const override;
120  void fillValidTuneCPUList(SmallVectorImpl<StringRef> &Values) const override;
121  bool supportsTargetAttributeTune() const override { return true; }
122  ParsedTargetAttr parseTargetAttr(StringRef Str) const override;
123};
124class LLVM_LIBRARY_VISIBILITY RISCV32TargetInfo : public RISCVTargetInfo {
125public:
126  RISCV32TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
127      : RISCVTargetInfo(Triple, Opts) {
128    IntPtrType = SignedInt;
129    PtrDiffType = SignedInt;
130    SizeType = UnsignedInt;
131    resetDataLayout("e-m:e-p:32:32-i64:64-n32-S128");
132  }
133
134  bool setABI(const std::string &Name) override {
135    if (Name == "ilp32e") {
136      ABI = Name;
137      resetDataLayout("e-m:e-p:32:32-i64:64-n32-S32");
138      return true;
139    }
140
141    if (Name == "ilp32" || Name == "ilp32f" || Name == "ilp32d") {
142      ABI = Name;
143      return true;
144    }
145    return false;
146  }
147
148  void setMaxAtomicWidth() override {
149    MaxAtomicPromoteWidth = 128;
150
151    if (ISAInfo->hasExtension("a"))
152      MaxAtomicInlineWidth = 32;
153  }
154};
155class LLVM_LIBRARY_VISIBILITY RISCV64TargetInfo : public RISCVTargetInfo {
156public:
157  RISCV64TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
158      : RISCVTargetInfo(Triple, Opts) {
159    LongWidth = LongAlign = PointerWidth = PointerAlign = 64;
160    IntMaxType = Int64Type = SignedLong;
161    resetDataLayout("e-m:e-p:64:64-i64:64-i128:128-n32:64-S128");
162  }
163
164  bool setABI(const std::string &Name) override {
165    if (Name == "lp64e") {
166      ABI = Name;
167      resetDataLayout("e-m:e-p:64:64-i64:64-i128:128-n32:64-S64");
168      return true;
169    }
170
171    if (Name == "lp64" || Name == "lp64f" || Name == "lp64d") {
172      ABI = Name;
173      return true;
174    }
175    return false;
176  }
177
178  void setMaxAtomicWidth() override {
179    MaxAtomicPromoteWidth = 128;
180
181    if (ISAInfo->hasExtension("a"))
182      MaxAtomicInlineWidth = 64;
183  }
184};
185} // namespace targets
186} // namespace clang
187
188#endif // LLVM_CLANG_LIB_BASIC_TARGETS_RISCV_H
189