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add a getSignBit method, elimiante virtual method from getBitMask()

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34916 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-03-04 23:33:19 +00:00
parent 82a60eca8f
commit f298fd0428
1 changed files with 7 additions and 1 deletions
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8
include/llvm/DerivedTypes.h
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@ -106,9 +106,15 @@ public:
/// that can be set by an unsigned version of this type. This is 0xFF for /// that can be set by an unsigned version of this type. This is 0xFF for
/// sbyte/ubyte, 0xFFFF for shorts, etc. /// sbyte/ubyte, 0xFFFF for shorts, etc.
uint64_t getBitMask() const { uint64_t getBitMask() const {
return ~uint64_t(0UL) >> (64-getPrimitiveSizeInBits()); return ~uint64_t(0UL) >> (64-getBitWidth());
} }
/// getSignBit - Return a uint64_t with just the most significant bit set (the
/// sign bit, if the value is treated as a signed number).
uint64_t getSignBit() const {
return 1ULL << (getBitWidth()-1);
}
/// For example, this is 0xFF for an 8 bit integer, 0xFFFF for i16, etc. /// For example, this is 0xFF for an 8 bit integer, 0xFFFF for i16, etc.
/// @returns a bit mask with ones set for all the bits of this type. /// @returns a bit mask with ones set for all the bits of this type.
/// @brief Get a bit mask for this type. /// @brief Get a bit mask for this type.