diff options
Diffstat (limited to 'lib/Lex/Preprocessor.cpp')
| -rw-r--r-- | lib/Lex/Preprocessor.cpp | 40 |
1 files changed, 38 insertions, 2 deletions
diff --git a/lib/Lex/Preprocessor.cpp b/lib/Lex/Preprocessor.cpp index 9758a586e4..f00f1ea69c 100644 --- a/lib/Lex/Preprocessor.cpp +++ b/lib/Lex/Preprocessor.cpp @@ -33,6 +33,7 @@ #include "clang/Basic/Diagnostic.h" #include "clang/Basic/SourceManager.h" #include "clang/Basic/TargetInfo.h" +#include "llvm/ADT/APFloat.h" #include "llvm/ADT/SmallVector.h" #include "llvm/Support/MemoryBuffer.h" #include "llvm/Support/Streams.h" @@ -377,6 +378,33 @@ static void DefineBuiltinMacro(std::vector<char> &Buf, const char *Macro, Buf.push_back('\n'); } +/// PickFP - This is used to pick a value based on the FP semantics of the +/// specified FP model. +template <typename T> +static T PickFP(const llvm::fltSemantics *Sem, T IEEESingleVal, + T IEEEDoubleVal, T X87DoubleExtendedVal, T PPCDoubleDoubleVal) { + if (Sem == &llvm::APFloat::IEEEsingle) + return IEEESingleVal; + if (Sem == &llvm::APFloat::IEEEdouble) + return IEEEDoubleVal; + if (Sem == &llvm::APFloat::x87DoubleExtended) + return X87DoubleExtendedVal; + assert(Sem == &llvm::APFloat::PPCDoubleDouble); + return PPCDoubleDoubleVal; +} + +static void DefineFloatMacros(std::vector<char> &Buf, const char *Prefix, + const llvm::fltSemantics *Sem) { + const char *DenormMin = PickFP(Sem, "1.40129846e-45F", + "4.9406564584124654e-324", + "3.64519953188247460253e-4951L", + "4.94065645841246544176568792868221e-324L"); + + char MacroBuf[60]; + sprintf(MacroBuf, "__%s_DENORM_MIN__=%s", Prefix, DenormMin); + DefineBuiltinMacro(Buf, MacroBuf); +} + static void InitializePredefinedMacros(Preprocessor &PP, std::vector<char> &Buf) { @@ -472,9 +500,13 @@ static void InitializePredefinedMacros(Preprocessor &PP, assert(TI.getCharWidth() == 8 && "Only support 8-bit char so far"); DefineBuiltinMacro(Buf, "__CHAR_BIT__=8"); DefineBuiltinMacro(Buf, "__SCHAR_MAX__=127"); + + assert(TI.getWCharWidth() == 32 && "Only support 32-bit wchar so far"); + DefineBuiltinMacro(Buf, "__WCHAR_MAX__=2147483647"); + DefineBuiltinMacro(Buf, "__WCHAR_TYPE__=int"); + DefineBuiltinMacro(Buf, "__WINT_TYPE__=int"); assert(TI.getShortWidth() == 16 && "Only support 16-bit short so far"); - DefineBuiltinMacro(Buf, "__CHAR_BIT__=8"); DefineBuiltinMacro(Buf, "__SHRT_MAX__=32767"); if (TI.getIntWidth() == 32) @@ -506,6 +538,7 @@ static void InitializePredefinedMacros(Preprocessor &PP, assert(TI.getPointerWidth(0) == TI.getLongWidth() && TI.getLongWidth() == 64 && TI.getIntWidth() == 32 && "Not I32 LP64?"); + assert(TI.getIntMaxTWidth() == 64); DefineBuiltinMacro(Buf, "__INTMAX_MAX__=9223372036854775807L"); DefineBuiltinMacro(Buf, "__INTMAX_TYPE__=long int"); DefineBuiltinMacro(Buf, "__PTRDIFF_TYPE__=long int"); @@ -518,6 +551,7 @@ static void InitializePredefinedMacros(Preprocessor &PP, "Unexpected target sizes"); // We currently only support targets where long is 32-bit. This can be // easily generalized in the future. + assert(TI.getIntMaxTWidth() == 64); DefineBuiltinMacro(Buf, "__INTMAX_MAX__=9223372036854775807LL"); DefineBuiltinMacro(Buf, "__INTMAX_TYPE__=long long int"); DefineBuiltinMacro(Buf, "__PTRDIFF_TYPE__=int"); @@ -528,7 +562,9 @@ static void InitializePredefinedMacros(Preprocessor &PP, assert(TI.getPointerWidth(0) == TI.getLongWidth()); DefineBuiltinMacro(Buf, "__SIZE_TYPE__=long unsigned int"); - + DefineFloatMacros(Buf, "FLT", &TI.getFloatFormat()); + DefineFloatMacros(Buf, "DBL", &TI.getDoubleFormat()); + DefineFloatMacros(Buf, "LDBL", &TI.getLongDoubleFormat()); // Add __builtin_va_list typedef. |