clang  10.0.0git
ARM.h
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1 //===--- ARM.h - Declare ARM 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 ARM TargetInfo objects.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_CLANG_LIB_BASIC_TARGETS_ARM_H
14 #define LLVM_CLANG_LIB_BASIC_TARGETS_ARM_H
15 
16 #include "OSTargets.h"
17 #include "clang/Basic/TargetInfo.h"
19 #include "llvm/ADT/Triple.h"
20 #include "llvm/Support/Compiler.h"
21 #include "llvm/Support/TargetParser.h"
22 
23 namespace clang {
24 namespace targets {
25 
26 class LLVM_LIBRARY_VISIBILITY ARMTargetInfo : public TargetInfo {
27  // Possible FPU choices.
28  enum FPUMode {
29  VFP2FPU = (1 << 0),
30  VFP3FPU = (1 << 1),
31  VFP4FPU = (1 << 2),
32  NeonFPU = (1 << 3),
33  FPARMV8 = (1 << 4)
34  };
35 
36  enum MVEMode {
37  MVE_INT = (1 << 0),
38  MVE_FP = (1 << 1)
39  };
40 
41  // Possible HWDiv features.
42  enum HWDivMode { HWDivThumb = (1 << 0), HWDivARM = (1 << 1) };
43 
44  static bool FPUModeIsVFP(FPUMode Mode) {
45  return Mode & (VFP2FPU | VFP3FPU | VFP4FPU | NeonFPU | FPARMV8);
46  }
47 
48  static const TargetInfo::GCCRegAlias GCCRegAliases[];
49  static const char *const GCCRegNames[];
50 
51  std::string ABI, CPU;
52 
53  StringRef CPUProfile;
54  StringRef CPUAttr;
55 
56  enum { FP_Default, FP_VFP, FP_Neon } FPMath;
57 
58  llvm::ARM::ISAKind ArchISA;
59  llvm::ARM::ArchKind ArchKind = llvm::ARM::ArchKind::ARMV4T;
60  llvm::ARM::ProfileKind ArchProfile;
61  unsigned ArchVersion;
62 
63  unsigned FPU : 5;
64  unsigned MVE : 2;
65 
66  unsigned IsAAPCS : 1;
67  unsigned HWDiv : 2;
68 
69  // Initialized via features.
70  unsigned SoftFloat : 1;
71  unsigned SoftFloatABI : 1;
72 
73  unsigned CRC : 1;
74  unsigned Crypto : 1;
75  unsigned DSP : 1;
76  unsigned Unaligned : 1;
77  unsigned DotProd : 1;
78 
79  enum {
80  LDREX_B = (1 << 0), /// byte (8-bit)
81  LDREX_H = (1 << 1), /// half (16-bit)
82  LDREX_W = (1 << 2), /// word (32-bit)
83  LDREX_D = (1 << 3), /// double (64-bit)
84  };
85 
86  uint32_t LDREX;
87 
88  // ACLE 6.5.1 Hardware floating point
89  enum {
90  HW_FP_HP = (1 << 1), /// half (16-bit)
91  HW_FP_SP = (1 << 2), /// single (32-bit)
92  HW_FP_DP = (1 << 3), /// double (64-bit)
93  };
94  uint32_t HW_FP;
95 
96  static const Builtin::Info BuiltinInfo[];
97 
98  void setABIAAPCS();
99  void setABIAPCS(bool IsAAPCS16);
100 
101  void setArchInfo();
102  void setArchInfo(llvm::ARM::ArchKind Kind);
103 
104  void setAtomic();
105 
106  bool isThumb() const;
107  bool supportsThumb() const;
108  bool supportsThumb2() const;
109  bool hasMVE() const;
110  bool hasMVEFloat() const;
111 
112  StringRef getCPUAttr() const;
113  StringRef getCPUProfile() const;
114 
115 public:
116  ARMTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
117 
118  StringRef getABI() const override;
119  bool setABI(const std::string &Name) override;
120 
121  // FIXME: This should be based on Arch attributes, not CPU names.
122  bool
123  initFeatureMap(llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags,
124  StringRef CPU,
125  const std::vector<std::string> &FeaturesVec) const override;
126 
127  bool isValidFeatureName(StringRef Feature) const override {
128  // We pass soft-float-abi in as a -target-feature, but the backend figures
129  // this out through other means.
130  return Feature != "soft-float-abi";
131  }
132 
133  bool handleTargetFeatures(std::vector<std::string> &Features,
134  DiagnosticsEngine &Diags) override;
135 
136  bool hasFeature(StringRef Feature) const override;
137 
138  bool isValidCPUName(StringRef Name) const override;
139  void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const override;
140 
141  bool setCPU(const std::string &Name) override;
142 
143  bool setFPMath(StringRef Name) override;
144 
145  bool useFP16ConversionIntrinsics() const override {
146  return false;
147  }
148 
149  void getTargetDefinesARMV81A(const LangOptions &Opts,
150  MacroBuilder &Builder) const;
151  void getTargetDefinesARMV82A(const LangOptions &Opts,
152  MacroBuilder &Builder) const;
153  void getTargetDefinesARMV83A(const LangOptions &Opts,
154  MacroBuilder &Builder) const;
155  void getTargetDefines(const LangOptions &Opts,
156  MacroBuilder &Builder) const override;
157 
158  ArrayRef<Builtin::Info> getTargetBuiltins() const override;
159 
160  bool isCLZForZeroUndef() const override;
161  BuiltinVaListKind getBuiltinVaListKind() const override;
162 
163  ArrayRef<const char *> getGCCRegNames() const override;
164  ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override;
165  bool validateAsmConstraint(const char *&Name,
166  TargetInfo::ConstraintInfo &Info) const override;
167  std::string convertConstraint(const char *&Constraint) const override;
168  bool
169  validateConstraintModifier(StringRef Constraint, char Modifier, unsigned Size,
170  std::string &SuggestedModifier) const override;
171  const char *getClobbers() const override;
172 
173  StringRef getConstraintRegister(StringRef Constraint,
174  StringRef Expression) const override {
175  return Expression;
176  }
177 
178  CallingConvCheckResult checkCallingConvention(CallingConv CC) const override;
179 
180  int getEHDataRegisterNumber(unsigned RegNo) const override;
181 
182  bool hasSjLjLowering() const override;
183 };
184 
185 class LLVM_LIBRARY_VISIBILITY ARMleTargetInfo : public ARMTargetInfo {
186 public:
187  ARMleTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
188  void getTargetDefines(const LangOptions &Opts,
189  MacroBuilder &Builder) const override;
190 };
191 
192 class LLVM_LIBRARY_VISIBILITY ARMbeTargetInfo : public ARMTargetInfo {
193 public:
194  ARMbeTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
195  void getTargetDefines(const LangOptions &Opts,
196  MacroBuilder &Builder) const override;
197 };
198 
199 class LLVM_LIBRARY_VISIBILITY WindowsARMTargetInfo
200  : public WindowsTargetInfo<ARMleTargetInfo> {
201  const llvm::Triple Triple;
202 
203 public:
204  WindowsARMTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
205 
206  void getVisualStudioDefines(const LangOptions &Opts,
207  MacroBuilder &Builder) const;
208 
209  BuiltinVaListKind getBuiltinVaListKind() const override;
210 
211  CallingConvCheckResult checkCallingConvention(CallingConv CC) const override;
212 };
213 
214 // Windows ARM + Itanium C++ ABI Target
215 class LLVM_LIBRARY_VISIBILITY ItaniumWindowsARMleTargetInfo
216  : public WindowsARMTargetInfo {
217 public:
218  ItaniumWindowsARMleTargetInfo(const llvm::Triple &Triple,
219  const TargetOptions &Opts);
220 
221  void getTargetDefines(const LangOptions &Opts,
222  MacroBuilder &Builder) const override;
223 };
224 
225 // Windows ARM, MS (C++) ABI
226 class LLVM_LIBRARY_VISIBILITY MicrosoftARMleTargetInfo
227  : public WindowsARMTargetInfo {
228 public:
229  MicrosoftARMleTargetInfo(const llvm::Triple &Triple,
230  const TargetOptions &Opts);
231 
232  void getTargetDefines(const LangOptions &Opts,
233  MacroBuilder &Builder) const override;
234 };
235 
236 // ARM MinGW target
237 class LLVM_LIBRARY_VISIBILITY MinGWARMTargetInfo : public WindowsARMTargetInfo {
238 public:
239  MinGWARMTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
240 
241  void getTargetDefines(const LangOptions &Opts,
242  MacroBuilder &Builder) const override;
243 };
244 
245 // ARM Cygwin target
246 class LLVM_LIBRARY_VISIBILITY CygwinARMTargetInfo : public ARMleTargetInfo {
247 public:
248  CygwinARMTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
249 
250  void getTargetDefines(const LangOptions &Opts,
251  MacroBuilder &Builder) const override;
252 };
253 
254 class LLVM_LIBRARY_VISIBILITY DarwinARMTargetInfo
255  : public DarwinTargetInfo<ARMleTargetInfo> {
256 protected:
257  void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
258  MacroBuilder &Builder) const override;
259 
260 public:
261  DarwinARMTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
262 };
263 
264 // 32-bit RenderScript is armv7 with width and align of 'long' set to 8-bytes
265 class LLVM_LIBRARY_VISIBILITY RenderScript32TargetInfo
266  : public ARMleTargetInfo {
267 public:
268  RenderScript32TargetInfo(const llvm::Triple &Triple,
269  const TargetOptions &Opts);
270 
271  void getTargetDefines(const LangOptions &Opts,
272  MacroBuilder &Builder) const override;
273 };
274 
275 } // namespace targets
276 } // namespace clang
277 
278 #endif // LLVM_CLANG_LIB_BASIC_TARGETS_ARM_H
static const Builtin::Info BuiltinInfo[]
Definition: Builtins.cpp:20
StringRef getConstraintRegister(StringRef Constraint, StringRef Expression) const override
Extracts a register from the passed constraint (if it is a single-register constraint) and the asm la...
Definition: ARM.h:173
Options for controlling the target.
Definition: TargetOptions.h:26
Keeps track of the various options that can be enabled, which controls the dialect of C or C++ that i...
Definition: LangOptions.h:53
Concrete class used by the front-end to report problems and issues.
Definition: Diagnostic.h:149
static const char *const GCCRegNames[]
Definition: X86.cpp:43
bool isValidFeatureName(StringRef Feature) const override
Determine whether this TargetInfo supports the given feature.
Definition: ARM.h:127
Exposes information about the current target.
Definition: TargetInfo.h:164
bool useFP16ConversionIntrinsics() const override
Check whether llvm intrinsics such as llvm.convert.to.fp16 should be used to convert to and from __fp...
Definition: ARM.h:145
CallingConv
CallingConv - Specifies the calling convention that a function uses.
Definition: Specifiers.h:265
Kind
OpenMPLinearClauseKind Modifier
Modifier of &#39;linear&#39; clause.
Definition: OpenMPClause.h:101
Defines the clang::TargetOptions class.
Dataflow Directional Tag Classes.
BuiltinVaListKind
The different kinds of __builtin_va_list types defined by the target implementation.
Definition: TargetInfo.h:226
static bool hasFeature(StringRef Feature, const LangOptions &LangOpts, const TargetInfo &Target)
Determine whether a translation unit built using the current language options has the given feature...
Definition: Module.cpp:106
Defines the clang::TargetInfo interface.