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Be more explicit concerning argument sizes.
Use VC++ byteswap intrinsics. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35267 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -23,39 +23,39 @@ namespace llvm {
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// ambiguity.
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/// Hi_32 - This function returns the high 32 bits of a 64 bit value.
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inline unsigned Hi_32(uint64_t Value) {
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return static_cast<unsigned>(Value >> 32);
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inline uint32_t Hi_32(uint64_t Value) {
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return static_cast<uint32_t>(Value >> 32);
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}
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/// Lo_32 - This function returns the low 32 bits of a 64 bit value.
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inline unsigned Lo_32(uint64_t Value) {
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return static_cast<unsigned>(Value);
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inline uint32_t Lo_32(uint64_t Value) {
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return static_cast<uint32_t>(Value);
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}
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/// is?Type - these functions produce optimal testing for integer data types.
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inline bool isInt8 (int64_t Value) {
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return static_cast<signed char>(Value) == Value;
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return static_cast<int8_t>(Value) == Value;
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}
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inline bool isUInt8 (int64_t Value) {
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return static_cast<unsigned char>(Value) == Value;
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return static_cast<uint8_t>(Value) == Value;
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}
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inline bool isInt16 (int64_t Value) {
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return static_cast<signed short>(Value) == Value;
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return static_cast<int16_t>(Value) == Value;
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}
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inline bool isUInt16(int64_t Value) {
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return static_cast<unsigned short>(Value) == Value;
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return static_cast<uint16_t>(Value) == Value;
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}
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inline bool isInt32 (int64_t Value) {
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return static_cast<signed int>(Value) == Value;
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return static_cast<int32_t>(Value) == Value;
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}
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inline bool isUInt32(int64_t Value) {
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return static_cast<unsigned int>(Value) == Value;
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return static_cast<uint32_t>(Value) == Value;
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}
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/// isMask_32 - This function returns true if the argument is a sequence of ones
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/// starting at the least significant bit with the remainder zero (32 bit
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/// version). Ex. isMask_32(0x0000FFFFU) == true.
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inline const bool isMask_32(unsigned Value) {
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inline const bool isMask_32(uint32_t Value) {
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return Value && ((Value + 1) & Value) == 0;
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}
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@ -69,7 +69,7 @@ inline const bool isMask_64(uint64_t Value) {
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/// isShiftedMask_32 - This function returns true if the argument contains a
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/// sequence of ones with the remainder zero (32 bit version.)
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/// Ex. isShiftedMask_32(0x0000FF00U) == true.
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inline const bool isShiftedMask_32(unsigned Value) {
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inline const bool isShiftedMask_32(uint32_t Value) {
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return isMask_32((Value - 1) | Value);
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}
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@ -81,7 +81,7 @@ inline const bool isShiftedMask_64(uint64_t Value) {
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/// isPowerOf2_32 - This function returns true if the argument is a power of
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/// two > 0. Ex. isPowerOf2_32(0x00100000U) == true (32 bit edition.)
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inline bool isPowerOf2_32(unsigned Value) {
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inline bool isPowerOf2_32(uint32_t Value) {
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return Value && !(Value & (Value - 1));
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}
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@ -93,22 +93,30 @@ inline bool isPowerOf2_64(uint64_t Value) {
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/// ByteSwap_16 - This function returns a byte-swapped representation of the
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/// 16-bit argument, Value.
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inline unsigned short ByteSwap_16(unsigned short Value) {
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unsigned short Hi = Value << 8;
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unsigned short Lo = Value >> 8;
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inline uint16_t ByteSwap_16(uint16_t Value) {
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#if defined(_MSC_VER) && !defined(_DEBUG)
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// The DLL version of the runtime lacks these functions (bug!?), but in a
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// release build they're replaced with BSWAP instructions anyway.
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return _byteswap_ushort(Value);
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#else
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uint16_t Hi = Value << 8;
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uint16_t Lo = Value >> 8;
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return Hi | Lo;
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#endif
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}
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/// ByteSwap_32 - This function returns a byte-swapped representation of the
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/// 32-bit argument, Value.
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inline unsigned ByteSwap_32(unsigned Value) {
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inline uint32_t ByteSwap_32(uint32_t Value) {
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#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
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return __builtin_bswap32(Value);
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#elif defined(_MSC_VER) && !defined(_DEBUG)
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return _byteswap_ulong(Value);
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#else
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unsigned Byte0 = Value & 0x000000FF;
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unsigned Byte1 = Value & 0x0000FF00;
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unsigned Byte2 = Value & 0x00FF0000;
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unsigned Byte3 = Value & 0xFF000000;
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uint32_t Byte0 = Value & 0x000000FF;
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uint32_t Byte1 = Value & 0x0000FF00;
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uint32_t Byte2 = Value & 0x00FF0000;
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uint32_t Byte3 = Value & 0xFF000000;
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return (Byte0 << 24) | (Byte1 << 8) | (Byte2 >> 8) | (Byte3 >> 24);
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#endif
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}
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@ -118,9 +126,11 @@ inline unsigned ByteSwap_32(unsigned Value) {
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inline uint64_t ByteSwap_64(uint64_t Value) {
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#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
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return __builtin_bswap64(Value);
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#elif defined(_MSC_VER) && !defined(_DEBUG)
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return _byteswap_uint64(Value);
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#else
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uint64_t Hi = ByteSwap_32(unsigned(Value));
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uint64_t Lo = ByteSwap_32(unsigned(Value >> 32));
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uint64_t Hi = ByteSwap_32(uint32_t(Value));
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uint32_t Lo = ByteSwap_32(uint32_t(Value >> 32));
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return (Hi << 32) | Lo;
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#endif
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}
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@ -129,7 +139,7 @@ inline uint64_t ByteSwap_64(uint64_t Value) {
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/// counting the number of zeros from the most significant bit to the first one
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/// bit. Ex. CountLeadingZeros_32(0x00F000FF) == 8.
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/// Returns 32 if the word is zero.
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inline unsigned CountLeadingZeros_32(unsigned Value) {
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inline unsigned CountLeadingZeros_32(uint32_t Value) {
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unsigned Count; // result
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#if __GNUC__ >= 4
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// PowerPC is defined for __builtin_clz(0)
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@ -142,7 +152,7 @@ inline unsigned CountLeadingZeros_32(unsigned Value) {
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Count = 0;
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// bisecton method for count leading zeros
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for (unsigned Shift = 32 >> 1; Shift; Shift >>= 1) {
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unsigned Tmp = Value >> Shift;
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uint32_t Tmp = Value >> Shift;
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if (Tmp) {
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Value = Tmp;
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} else {
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@ -170,7 +180,7 @@ inline unsigned CountLeadingZeros_64(uint64_t Value) {
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if (!Value) return 64;
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Count = 0;
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// bisecton method for count leading zeros
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for (uint64_t Shift = 64 >> 1; Shift; Shift >>= 1) {
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for (unsigned Shift = 64 >> 1; Shift; Shift >>= 1) {
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uint64_t Tmp = Value >> Shift;
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if (Tmp) {
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Value = Tmp;
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@ -180,7 +190,7 @@ inline unsigned CountLeadingZeros_64(uint64_t Value) {
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}
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} else {
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// get hi portion
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unsigned Hi = Hi_32(Value);
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uint32_t Hi = Hi_32(Value);
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// if some bits in hi portion
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if (Hi) {
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@ -188,7 +198,7 @@ inline unsigned CountLeadingZeros_64(uint64_t Value) {
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Count = CountLeadingZeros_32(Hi);
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} else {
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// get lo portion
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unsigned Lo = Lo_32(Value);
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uint32_t Lo = Lo_32(Value);
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// same as 32 bit value
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Count = CountLeadingZeros_32(Lo)+32;
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}
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@ -201,7 +211,7 @@ inline unsigned CountLeadingZeros_64(uint64_t Value) {
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/// counting the number of zeros from the least significant bit to the first one
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/// bit. Ex. CountTrailingZeros_32(0xFF00FF00) == 8.
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/// Returns 32 if the word is zero.
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inline unsigned CountTrailingZeros_32(unsigned Value) {
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inline unsigned CountTrailingZeros_32(uint32_t Value) {
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#if __GNUC__ >= 4
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return Value ? __builtin_ctz(Value) : 32;
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#else
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@ -262,7 +272,7 @@ inline unsigned CountPopulation_64(uint64_t Value) {
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/// Log2_32 - This function returns the floor log base 2 of the specified value,
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/// -1 if the value is zero. (32 bit edition.)
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/// Ex. Log2_32(32) == 5, Log2_32(1) == 0, Log2_32(0) == -1, Log2_32(6) == 2
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inline unsigned Log2_32(unsigned Value) {
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inline unsigned Log2_32(uint32_t Value) {
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return 31 - CountLeadingZeros_32(Value);
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}
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@ -275,7 +285,7 @@ inline unsigned Log2_64(uint64_t Value) {
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/// Log2_32_Ceil - This function returns the ceil log base 2 of the specified
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/// value, 32 if the value is zero. (32 bit edition).
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/// Ex. Log2_32_Ceil(32) == 5, Log2_32_Ceil(1) == 0, Log2_32_Ceil(6) == 3
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inline unsigned Log2_32_Ceil(unsigned Value) {
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inline unsigned Log2_32_Ceil(uint32_t Value) {
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return 32-CountLeadingZeros_32(Value-1);
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}
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