X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FSupport%2FMathExtras.h;h=4005161320d66b103adc349770437698eddd7ea5;hb=cbeb8d9869aafec3c2c1ee0922f0a4d5bb4a916a;hp=fa12416aeac76807f6874dc5a5335c65a2b9b6bf;hpb=452394d812816b05f626d414ce6dbd3b87d45a73;p=oota-llvm.git diff --git a/include/llvm/Support/MathExtras.h b/include/llvm/Support/MathExtras.h index fa12416aeac..4005161320d 100644 --- a/include/llvm/Support/MathExtras.h +++ b/include/llvm/Support/MathExtras.h @@ -14,7 +14,7 @@ #ifndef LLVM_SUPPORT_MATHEXTRAS_H #define LLVM_SUPPORT_MATHEXTRAS_H -#include "llvm/System/DataTypes.h" +#include "llvm/Support/SwapByteOrder.h" namespace llvm { @@ -32,35 +32,69 @@ inline uint32_t Lo_32(uint64_t Value) { return static_cast(Value); } -/// is?Type - these functions produce optimal testing for integer data types. -inline bool isInt8 (int64_t Value) { - return static_cast(Value) == Value; -} -inline bool isUInt8 (int64_t Value) { - return static_cast(Value) == Value; -} -inline bool isInt16 (int64_t Value) { - return static_cast(Value) == Value; +/// isInt - Checks if an integer fits into the given bit width. +template +inline bool isInt(int64_t x) { + return N >= 64 || (-(INT64_C(1)<<(N-1)) <= x && x < (INT64_C(1)<<(N-1))); } -inline bool isUInt16(int64_t Value) { - return static_cast(Value) == Value; +// Template specializations to get better code for common cases. +template<> +inline bool isInt<8>(int64_t x) { + return static_cast(x) == x; } -inline bool isInt32 (int64_t Value) { - return static_cast(Value) == Value; +template<> +inline bool isInt<16>(int64_t x) { + return static_cast(x) == x; } -inline bool isUInt32(int64_t Value) { - return static_cast(Value) == Value; +template<> +inline bool isInt<32>(int64_t x) { + return static_cast(x) == x; } -template -inline bool isInt(int64_t x) { - return N >= 64 || (-(INT64_C(1)<<(N-1)) <= x && x < (INT64_C(1)<<(N-1))); +/// isShiftedInt - Checks if a signed integer is an N bit number shifted +/// left by S. +template +inline bool isShiftedInt(int64_t x) { + return isInt(x) && (x % (1< -inline bool isUint(uint64_t x) { +inline bool isUInt(uint64_t x) { return N >= 64 || x < (UINT64_C(1)< +inline bool isUInt<8>(uint64_t x) { + return static_cast(x) == x; +} +template<> +inline bool isUInt<16>(uint64_t x) { + return static_cast(x) == x; +} +template<> +inline bool isUInt<32>(uint64_t x) { + return static_cast(x) == x; +} + +/// isShiftedUInt - Checks if a unsigned integer is an N bit number shifted +/// left by S. +template +inline bool isShiftedUInt(uint64_t x) { + return isUInt(x) && (x % (1<> (64 - N))); +} + +/// isIntN - Checks if an signed integer fits into the given (dynamic) +/// bit width. +inline bool isIntN(unsigned N, int64_t x) { + return N >= 64 || (-(INT64_C(1)<<(N-1)) <= x && x < (INT64_C(1)<<(N-1))); +} /// isMask_32 - This function returns true if the argument is a sequence of ones /// starting at the least significant bit with the remainder zero (32 bit @@ -104,45 +138,19 @@ inline bool isPowerOf2_64(uint64_t Value) { /// ByteSwap_16 - This function returns a byte-swapped representation of the /// 16-bit argument, Value. inline uint16_t ByteSwap_16(uint16_t Value) { -#if defined(_MSC_VER) && !defined(_DEBUG) - // The DLL version of the runtime lacks these functions (bug!?), but in a - // release build they're replaced with BSWAP instructions anyway. - return _byteswap_ushort(Value); -#else - uint16_t Hi = Value << 8; - uint16_t Lo = Value >> 8; - return Hi | Lo; -#endif + return sys::SwapByteOrder_16(Value); } /// ByteSwap_32 - This function returns a byte-swapped representation of the /// 32-bit argument, Value. inline uint32_t ByteSwap_32(uint32_t Value) { -#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) && !defined(__ICC) - return __builtin_bswap32(Value); -#elif defined(_MSC_VER) && !defined(_DEBUG) - return _byteswap_ulong(Value); -#else - uint32_t Byte0 = Value & 0x000000FF; - uint32_t Byte1 = Value & 0x0000FF00; - uint32_t Byte2 = Value & 0x00FF0000; - uint32_t Byte3 = Value & 0xFF000000; - return (Byte0 << 24) | (Byte1 << 8) | (Byte2 >> 8) | (Byte3 >> 24); -#endif + return sys::SwapByteOrder_32(Value); } /// ByteSwap_64 - This function returns a byte-swapped representation of the /// 64-bit argument, Value. inline uint64_t ByteSwap_64(uint64_t Value) { -#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) && !defined(__ICC) - return __builtin_bswap64(Value); -#elif defined(_MSC_VER) && !defined(_DEBUG) - return _byteswap_uint64(Value); -#else - uint64_t Hi = ByteSwap_32(uint32_t(Value)); - uint32_t Lo = ByteSwap_32(uint32_t(Value >> 32)); - return (Hi << 32) | Lo; -#endif + return sys::SwapByteOrder_64(Value); } /// CountLeadingZeros_32 - this function performs the platform optimal form of @@ -406,14 +414,14 @@ int IsInf(double d); /// MinAlign - A and B are either alignments or offsets. Return the minimum /// alignment that may be assumed after adding the two together. -static inline uint64_t MinAlign(uint64_t A, uint64_t B) { +inline uint64_t MinAlign(uint64_t A, uint64_t B) { // The largest power of 2 that divides both A and B. return (A | B) & -(A | B); } /// NextPowerOf2 - Returns the next power of two (in 64-bits) /// that is strictly greater than A. Returns zero on overflow. -static inline uint64_t NextPowerOf2(uint64_t A) { +inline uint64_t NextPowerOf2(uint64_t A) { A |= (A >> 1); A |= (A >> 2); A |= (A >> 4); @@ -449,6 +457,18 @@ inline int64_t abs64(int64_t x) { return (x < 0) ? -x : x; } +/// SignExtend32 - Sign extend B-bit number x to 32-bit int. +/// Usage int32_t r = SignExtend32<5>(x); +template inline int32_t SignExtend32(uint32_t x) { + return int32_t(x << (32 - B)) >> (32 - B); +} + +/// SignExtend64 - Sign extend B-bit number x to 64-bit int. +/// Usage int64_t r = SignExtend64<5>(x); +template inline int64_t SignExtend64(uint64_t x) { + return int64_t(x << (64 - B)) >> (64 - B); +} + } // End llvm namespace #endif