clang  9.0.0svn
RISCV.cpp
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1 //===--- RISCV.cpp - Implement RISCV target feature support ---------------===//
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 RISCV TargetInfo objects.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "RISCV.h"
15 #include "llvm/ADT/StringSwitch.h"
16 
17 using namespace clang;
18 using namespace clang::targets;
19 
21  static const char *const GCCRegNames[] = {
22  "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7",
23  "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15",
24  "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23",
25  "x24", "x25", "x26", "x27", "x28", "x29", "x30", "x31"};
26  return llvm::makeArrayRef(GCCRegNames);
27 }
28 
30  static const TargetInfo::GCCRegAlias GCCRegAliases[] = {
31  {{"zero"}, "x0"}, {{"ra"}, "x1"}, {{"sp"}, "x2"}, {{"gp"}, "x3"},
32  {{"tp"}, "x4"}, {{"t0"}, "x5"}, {{"t1"}, "x6"}, {{"t2"}, "x7"},
33  {{"s0"}, "x8"}, {{"s1"}, "x9"}, {{"a0"}, "x10"}, {{"a1"}, "x11"},
34  {{"a2"}, "x12"}, {{"a3"}, "x13"}, {{"a4"}, "x15"}, {{"a5"}, "x15"},
35  {{"a6"}, "x16"}, {{"a7"}, "x17"}, {{"s2"}, "x18"}, {{"s3"}, "x19"},
36  {{"s4"}, "x20"}, {{"s5"}, "x21"}, {{"s6"}, "x22"}, {{"s7"}, "x23"},
37  {{"s8"}, "x24"}, {{"s9"}, "x25"}, {{"s10"}, "x26"}, {{"s11"}, "x27"},
38  {{"t3"}, "x28"}, {{"t4"}, "x29"}, {{"t5"}, "x30"}, {{"t6"}, "x31"}};
39  return llvm::makeArrayRef(GCCRegAliases);
40 }
41 
43  MacroBuilder &Builder) const {
44  Builder.defineMacro("__ELF__");
45  Builder.defineMacro("__riscv");
46  bool Is64Bit = getTriple().getArch() == llvm::Triple::riscv64;
47  Builder.defineMacro("__riscv_xlen", Is64Bit ? "64" : "32");
48  // TODO: modify when more code models and ABIs are supported.
49  Builder.defineMacro("__riscv_cmodel_medlow");
50  Builder.defineMacro("__riscv_float_abi_soft");
51 
52  if (HasM) {
53  Builder.defineMacro("__riscv_mul");
54  Builder.defineMacro("__riscv_div");
55  Builder.defineMacro("__riscv_muldiv");
56  }
57 
58  if (HasA)
59  Builder.defineMacro("__riscv_atomic");
60 
61  if (HasF || HasD) {
62  Builder.defineMacro("__riscv_flen", HasD ? "64" : "32");
63  Builder.defineMacro("__riscv_fdiv");
64  Builder.defineMacro("__riscv_fsqrt");
65  }
66 
67  if (HasC)
68  Builder.defineMacro("__riscv_compressed");
69 }
70 
71 /// Return true if has this feature, need to sync with handleTargetFeatures.
72 bool RISCVTargetInfo::hasFeature(StringRef Feature) const {
73  bool Is64Bit = getTriple().getArch() == llvm::Triple::riscv64;
74  return llvm::StringSwitch<bool>(Feature)
75  .Case("riscv", true)
76  .Case("riscv32", !Is64Bit)
77  .Case("riscv64", Is64Bit)
78  .Case("m", HasM)
79  .Case("a", HasA)
80  .Case("f", HasF)
81  .Case("d", HasD)
82  .Case("c", HasC)
83  .Default(false);
84 }
85 
86 /// Perform initialization based on the user configured set of features.
87 bool RISCVTargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
88  DiagnosticsEngine &Diags) {
89  for (const auto &Feature : Features) {
90  if (Feature == "+m")
91  HasM = true;
92  else if (Feature == "+a")
93  HasA = true;
94  else if (Feature == "+f")
95  HasF = true;
96  else if (Feature == "+d")
97  HasD = true;
98  else if (Feature == "+c")
99  HasC = true;
100  }
101 
102  return true;
103 }
Defines the clang::MacroBuilder utility class.
const llvm::Triple & getTriple() const
Returns the target triple of the primary target.
Definition: TargetInfo.h:966
Keeps track of the various options that can be enabled, which controls the dialect of C or C++ that i...
Definition: LangOptions.h:49
Concrete class used by the front-end to report problems and issues.
Definition: Diagnostic.h:148
bool handleTargetFeatures(std::vector< std::string > &Features, DiagnosticsEngine &Diags) override
Perform initialization based on the user configured set of features.
Definition: RISCV.cpp:87
static const char *const GCCRegNames[]
Definition: X86.cpp:43
ArrayRef< const char * > getGCCRegNames() const override
Definition: RISCV.cpp:20
bool hasFeature(StringRef Feature) const override
Return true if has this feature, need to sync with handleTargetFeatures.
Definition: RISCV.cpp:72
Dataflow Directional Tag Classes.
void getTargetDefines(const LangOptions &Opts, MacroBuilder &Builder) const override
===-— Other target property query methods --------------------——===//
Definition: RISCV.cpp:42
void defineMacro(const Twine &Name, const Twine &Value="1")
Append a #define line for macro of the form "\#define Name Value\n".
Definition: MacroBuilder.h:29
ArrayRef< TargetInfo::GCCRegAlias > getGCCRegAliases() const override
Definition: RISCV.cpp:29