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Add MathExtras.h OffsetToAlignment, like RoundUpToAlignment but returns the

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offset to the next aligned integer.

llvm-svn: 80339
This commit is contained in:
Daniel Dunbar 2009-08-28 05:48:04 +00:00
parent 1b35869d3d
commit 300b88539d
1 changed files with 7 additions and 0 deletions
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7
include/llvm/Support/MathExtras.h
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@ -435,6 +435,13 @@ inline uint64_t RoundUpToAlignment(uint64_t Value, uint64_t Align) {
return ((Value + Align - 1) / Align) * Align;
}
/// OffsetToAlignment - Return the offset to the next integer (mod 2**64) that
/// is greater than or equal to \arg Value and is a multiple of \arg
/// Align. Align must be non-zero.
inline uint64_t OffsetToAlignment(uint64_t Value, uint64_t Align) {
return RoundUpToAlignment(Value, Align) - Value;
}
/// abs64 - absolute value of a 64-bit int. Not all environments support
/// "abs" on whatever their name for the 64-bit int type is. The absolute
/// value of the largest negative number is undefined, as with "abs".