sonyshang shangsony
pps83
/ ctz_clz.cpp
Last active
May 9, 2024 20:21
__builtin_ctz (ctzl, ctzll) and __builtin_clz (clzl, clzll) for Visual Studio
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| // Note, bsf/bsr are used by default. | |
| // Enable /arch:AVX2 compilation for better optimizations | |
| #if defined(_MSC_VER) && !defined(__clang__) | |
| #include <intrin.h> | |
| static __forceinline int __builtin_ctz(unsigned x) | |
| { | |
| #if defined(_M_ARM) || defined(_M_ARM64) || defined(_M_HYBRID_X86_ARM64) || defined(_M_ARM64EC) | |
| return (int)_CountTrailingZeros(x); |