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Make isInt?? and isUint?? template specializations of the generic versions. This

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makes calls a little bit more consistent and allows easy removal of the
specializations in the future. Convert all callers to the templated functions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99838 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2010-03-29 21:13:41 +00:00
parent 31441b7e95
commit 34247a0f35
10 changed files with 71 additions and 61 deletions
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50
include/llvm/Support/MathExtras.h
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@ -32,35 +32,43 @@ inline uint32_t Lo_32(uint64_t Value) {
return static_cast<uint32_t>(Value);
}
/// is?Type - these functions produce optimal testing for integer data types.
inline bool isInt8 (int64_t Value) {
return static_cast<int8_t>(Value) == Value;
}
inline bool isUInt8 (int64_t Value) {
return static_cast<uint8_t>(Value) == Value;
}
inline bool isInt16 (int64_t Value) {
return static_cast<int16_t>(Value) == Value;
}
inline bool isUInt16(int64_t Value) {
return static_cast<uint16_t>(Value) == Value;
}
inline bool isInt32 (int64_t Value) {
return static_cast<int32_t>(Value) == Value;
}
inline bool isUInt32(int64_t Value) {
return static_cast<uint32_t>(Value) == Value;
}
/// isInt - Checks if an integer fits into the given bit width.
template<unsigned N>
inline bool isInt(int64_t x) {
return N >= 64 || (-(INT64_C(1)<<(N-1)) <= x && x < (INT64_C(1)<<(N-1)));
}
// Template specializations to get better code for common cases.
template<>
inline bool isInt<8>(int64_t x) {
return static_cast<int8_t>(x) == x;
}
template<>
inline bool isInt<16>(int64_t x) {
return static_cast<int16_t>(x) == x;
}
template<>
inline bool isInt<32>(int64_t x) {
return static_cast<int32_t>(x) == x;
}
/// isUInt - Checks if an unsigned integer fits into the given bit width.
template<unsigned N>
inline bool isUint(uint64_t x) {
inline bool isUInt(uint64_t x) {
return N >= 64 || x < (UINT64_C(1)<<N);
}
// Template specializations to get better code for common cases.
template<>
inline bool isUInt<8>(uint64_t x) {
return static_cast<uint8_t>(x) == x;
}
template<>
inline bool isUInt<16>(uint64_t x) {
return static_cast<uint16_t>(x) == x;
}
template<>
inline bool isUInt<32>(uint64_t x) {
return static_cast<uint32_t>(x) == x;
}
/// 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