From eccf22528f8b4c21cdbd2f620cbe39dbb38ea6e1 Mon Sep 17 00:00:00 2001 From: Daniel Dunbar Date: Fri, 28 Aug 2009 05:48:04 +0000 Subject: [PATCH] Add MathExtras.h OffsetToAlignment, like RoundUpToAlignment but returns the offset to the next aligned integer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80339 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/Support/MathExtras.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/llvm/Support/MathExtras.h b/include/llvm/Support/MathExtras.h index 7ba5d8661cc..6fa618eb1af 100644 --- a/include/llvm/Support/MathExtras.h +++ b/include/llvm/Support/MathExtras.h @@ -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".