From 5005e27f9714f0eaa5b8b7a5a1f6751afa163f07 Mon Sep 17 00:00:00 2001 From: Dan Gohman Date: Wed, 3 Nov 2010 00:38:40 +0000 Subject: Factor code out of APInt to form a isUIntN helper function. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118133 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/Support/MathExtras.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/llvm/Support/MathExtras.h') diff --git a/include/llvm/Support/MathExtras.h b/include/llvm/Support/MathExtras.h index 3b907808dd..dafb479a99 100644 --- a/include/llvm/Support/MathExtras.h +++ b/include/llvm/Support/MathExtras.h @@ -71,6 +71,12 @@ inline bool isUInt<32>(uint64_t x) { return static_cast(x) == x; } +/// isUIntN - Checks if an unsigned integer fits into the given (dynamic) +/// bit width. +inline bool isUIntN(unsigned N, uint64_t x) { + return x == (x & (~0ULL >> (64 - N))); +} + /// 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 /// version). Ex. isMask_32(0x0000FFFFU) == true. -- cgit v1.2.3