1 //===--- ARM.h - Declare ARM target feature support -------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file declares ARM TargetInfo objects.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_CLANG_LIB_BASIC_TARGETS_ARM_H
15 #define LLVM_CLANG_LIB_BASIC_TARGETS_ARM_H
16 
17 #include "OSTargets.h"
18 #include "clang/Basic/TargetInfo.h"
19 #include "clang/Basic/TargetOptions.h"
20 #include "llvm/ADT/Triple.h"
21 #include "llvm/Support/Compiler.h"
22 #include "llvm/Support/TargetParser.h"
23 
24 namespace clang {
25 namespace targets {
26 
27 class LLVM_LIBRARY_VISIBILITY ARMTargetInfo : public TargetInfo {
28   // Possible FPU choices.
29   enum FPUMode {
30     VFP2FPU = (1 << 0),
31     VFP3FPU = (1 << 1),
32     VFP4FPU = (1 << 2),
33     NeonFPU = (1 << 3),
34     FPARMV8 = (1 << 4)
35   };
36 
37   // Possible HWDiv features.
38   enum HWDivMode { HWDivThumb = (1 << 0), HWDivARM = (1 << 1) };
39 
40   static bool FPUModeIsVFP(FPUMode Mode) {
41     return Mode & (VFP2FPU | VFP3FPU | VFP4FPU | NeonFPU | FPARMV8);
42   }
43 
44   static const TargetInfo::GCCRegAlias GCCRegAliases[];
45   static const char *const GCCRegNames[];
46 
47   std::string ABI, CPU;
48 
49   StringRef CPUProfile;
50   StringRef CPUAttr;
51 
52   enum { FP_Default, FP_VFP, FP_Neon } FPMath;
53 
54   llvm::ARM::ISAKind ArchISA;
55   llvm::ARM::ArchKind ArchKind = llvm::ARM::ArchKind::ARMV4T;
56   llvm::ARM::ProfileKind ArchProfile;
57   unsigned ArchVersion;
58 
59   unsigned FPU : 5;
60 
61   unsigned IsAAPCS : 1;
62   unsigned HWDiv : 2;
63 
64   // Initialized via features.
65   unsigned SoftFloat : 1;
66   unsigned SoftFloatABI : 1;
67 
68   unsigned CRC : 1;
69   unsigned Crypto : 1;
70   unsigned DSP : 1;
71   unsigned Unaligned : 1;
72 
73   enum {
74     LDREX_B = (1 << 0), /// byte (8-bit)
75     LDREX_H = (1 << 1), /// half (16-bit)
76     LDREX_W = (1 << 2), /// word (32-bit)
77     LDREX_D = (1 << 3), /// double (64-bit)
78   };
79 
80   uint32_t LDREX;
81 
82   // ACLE 6.5.1 Hardware floating point
83   enum {
84     HW_FP_HP = (1 << 1), /// half (16-bit)
85     HW_FP_SP = (1 << 2), /// single (32-bit)
86     HW_FP_DP = (1 << 3), /// double (64-bit)
87   };
88   uint32_t HW_FP;
89 
90   static const Builtin::Info BuiltinInfo[];
91 
92   void setABIAAPCS();
93   void setABIAPCS(bool IsAAPCS16);
94 
95   void setArchInfo();
96   void setArchInfo(llvm::ARM::ArchKind Kind);
97 
98   void setAtomic();
99 
100   bool isThumb() const;
101   bool supportsThumb() const;
102   bool supportsThumb2() const;
103 
104   StringRef getCPUAttr() const;
105   StringRef getCPUProfile() const;
106 
107 public:
108   ARMTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
109 
110   StringRef getABI() const override;
111   bool setABI(const std::string &Name) override;
112 
113   // FIXME: This should be based on Arch attributes, not CPU names.
114   bool
115   initFeatureMap(llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags,
116                  StringRef CPU,
117                  const std::vector<std::string> &FeaturesVec) const override;
118 
119   bool handleTargetFeatures(std::vector<std::string> &Features,
120                             DiagnosticsEngine &Diags) override;
121 
122   bool hasFeature(StringRef Feature) const override;
123 
124   bool isValidCPUName(StringRef Name) const override;
125   void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const override;
126 
127   bool setCPU(const std::string &Name) override;
128 
129   bool setFPMath(StringRef Name) override;
130 
131   bool useFP16ConversionIntrinsics() const override {
132     return false;
133   }
134 
135   void getTargetDefinesARMV81A(const LangOptions &Opts,
136                                MacroBuilder &Builder) const;
137 
138   void getTargetDefinesARMV82A(const LangOptions &Opts,
139                                MacroBuilder &Builder) const;
140   void getTargetDefines(const LangOptions &Opts,
141                         MacroBuilder &Builder) const override;
142 
143   ArrayRef<Builtin::Info> getTargetBuiltins() const override;
144 
145   bool isCLZForZeroUndef() const override;
146   BuiltinVaListKind getBuiltinVaListKind() const override;
147 
148   ArrayRef<const char *> getGCCRegNames() const override;
149   ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override;
150   bool validateAsmConstraint(const char *&Name,
151                              TargetInfo::ConstraintInfo &Info) const override;
152   std::string convertConstraint(const char *&Constraint) const override;
153   bool
154   validateConstraintModifier(StringRef Constraint, char Modifier, unsigned Size,
155                              std::string &SuggestedModifier) const override;
156   const char *getClobbers() const override;
157 
158   CallingConvCheckResult checkCallingConvention(CallingConv CC) const override;
159 
160   int getEHDataRegisterNumber(unsigned RegNo) const override;
161 
162   bool hasSjLjLowering() const override;
163 };
164 
165 class LLVM_LIBRARY_VISIBILITY ARMleTargetInfo : public ARMTargetInfo {
166 public:
167   ARMleTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
168   void getTargetDefines(const LangOptions &Opts,
169                         MacroBuilder &Builder) const override;
170 };
171 
172 class LLVM_LIBRARY_VISIBILITY ARMbeTargetInfo : public ARMTargetInfo {
173 public:
174   ARMbeTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
175   void getTargetDefines(const LangOptions &Opts,
176                         MacroBuilder &Builder) const override;
177 };
178 
179 class LLVM_LIBRARY_VISIBILITY WindowsARMTargetInfo
180     : public WindowsTargetInfo<ARMleTargetInfo> {
181   const llvm::Triple Triple;
182 
183 public:
184   WindowsARMTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
185 
186   void getVisualStudioDefines(const LangOptions &Opts,
187                               MacroBuilder &Builder) const;
188 
189   BuiltinVaListKind getBuiltinVaListKind() const override;
190 
191   CallingConvCheckResult checkCallingConvention(CallingConv CC) const override;
192 };
193 
194 // Windows ARM + Itanium C++ ABI Target
195 class LLVM_LIBRARY_VISIBILITY ItaniumWindowsARMleTargetInfo
196     : public WindowsARMTargetInfo {
197 public:
198   ItaniumWindowsARMleTargetInfo(const llvm::Triple &Triple,
199                                 const TargetOptions &Opts);
200 
201   void getTargetDefines(const LangOptions &Opts,
202                         MacroBuilder &Builder) const override;
203 };
204 
205 // Windows ARM, MS (C++) ABI
206 class LLVM_LIBRARY_VISIBILITY MicrosoftARMleTargetInfo
207     : public WindowsARMTargetInfo {
208 public:
209   MicrosoftARMleTargetInfo(const llvm::Triple &Triple,
210                            const TargetOptions &Opts);
211 
212   void getTargetDefines(const LangOptions &Opts,
213                         MacroBuilder &Builder) const override;
214 };
215 
216 // ARM MinGW target
217 class LLVM_LIBRARY_VISIBILITY MinGWARMTargetInfo : public WindowsARMTargetInfo {
218 public:
219   MinGWARMTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
220 
221   void getTargetDefines(const LangOptions &Opts,
222                         MacroBuilder &Builder) const override;
223 };
224 
225 // ARM Cygwin target
226 class LLVM_LIBRARY_VISIBILITY CygwinARMTargetInfo : public ARMleTargetInfo {
227 public:
228   CygwinARMTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
229 
230   void getTargetDefines(const LangOptions &Opts,
231                         MacroBuilder &Builder) const override;
232 };
233 
234 class LLVM_LIBRARY_VISIBILITY DarwinARMTargetInfo
235     : public DarwinTargetInfo<ARMleTargetInfo> {
236 protected:
237   void getOSDefines(const LangOptions &Opts, const llvm::Triple &Triple,
238                     MacroBuilder &Builder) const override;
239 
240 public:
241   DarwinARMTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts);
242 };
243 
244 // 32-bit RenderScript is armv7 with width and align of 'long' set to 8-bytes
245 class LLVM_LIBRARY_VISIBILITY RenderScript32TargetInfo
246     : public ARMleTargetInfo {
247 public:
248   RenderScript32TargetInfo(const llvm::Triple &Triple,
249                            const TargetOptions &Opts);
250 
251   void getTargetDefines(const LangOptions &Opts,
252                         MacroBuilder &Builder) const override;
253 };
254 
255 } // namespace targets
256 } // namespace clang
257 
258 #endif // LLVM_CLANG_LIB_BASIC_TARGETS_ARM_H
259