This commit is contained in:
Victor Zverovich 2015-02-20 08:51:01 -08:00
parent 27e0bf72c0
commit 2418a84f02

View File

@ -50,6 +50,12 @@
namespace fmt {
namespace internal {
# pragma intrinsic(_BitScanReverse)
inline uint32_t builtin_clz(uint32_t x) {
unsigned long r = 0;
_BitScanReverse(&r, x);
return 31 - r;
}
# define FMT_BUILTIN_CLZ(n) fmt::internal::builtin_clz(n)
# ifdef _WIN64
# pragma intrinsic(_BitScanReverse64)
inline uint32_t builtin_clzll(uint64_t n) {
@ -59,12 +65,6 @@ inline uint32_t builtin_clzll(uint64_t n) {
}
# define FMT_BUILTIN_CLZLL(n) fmt::internal::builtin_clzll(n)
# endif
inline uint32_t builtin_clz(uint32_t x) {
unsigned long r = 0;
_BitScanReverse(&r, x);
return 31 - r;
}
# define FMT_BUILTIN_CLZ(n) fmt::internal::builtin_clz(n)
}
}
#endif