From 2dcc27367ccc0ce03a78336472b9476d708d351e Mon Sep 17 00:00:00 2001 From: "Michael J. Spencer" Date: Wed, 16 Jan 2013 19:52:12 +0000 Subject: [PATCH] [Support] Add MSVC intrinsic for CountPopulation. Patch by Jakub Staszak. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172645 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/Support/MathExtras.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/llvm/Support/MathExtras.h b/include/llvm/Support/MathExtras.h index 11f9e63c9bb..10911ea11c5 100644 --- a/include/llvm/Support/MathExtras.h +++ b/include/llvm/Support/MathExtras.h @@ -299,6 +299,8 @@ inline unsigned CountTrailingOnes_64(uint64_t Value) { inline unsigned CountPopulation_32(uint32_t Value) { #if __GNUC__ >= 4 return __builtin_popcount(Value); +#elif _MSC_VER + return __popcnt(Value); #else uint32_t v = Value - ((Value >> 1) & 0x55555555); v = (v & 0x33333333) + ((v >> 2) & 0x33333333); @@ -311,6 +313,8 @@ inline unsigned CountPopulation_32(uint32_t Value) { inline unsigned CountPopulation_64(uint64_t Value) { #if __GNUC__ >= 4 return __builtin_popcountll(Value); +#elif _MSC_VER + return __popcnt64(Value); #else uint64_t v = Value - ((Value >> 1) & 0x5555555555555555ULL); v = (v & 0x3333333333333333ULL) + ((v >> 2) & 0x3333333333333333ULL); -- 2.34.1