diff options
Diffstat (limited to 'absl/numeric/internal/bits.h')
| -rw-r--r-- | absl/numeric/internal/bits.h | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/absl/numeric/internal/bits.h b/absl/numeric/internal/bits.h index 50828156..af45700f 100644 --- a/absl/numeric/internal/bits.h +++ b/absl/numeric/internal/bits.h @@ -23,12 +23,6 @@ // windows intrinsic functions. #if defined(_MSC_VER) && !defined(__clang__) #include <intrin.h> -#if defined(_M_X64) -#pragma intrinsic(_BitScanReverse64) -#pragma intrinsic(_BitScanForward64) -#endif -#pragma intrinsic(_BitScanReverse) -#pragma intrinsic(_BitScanForward) #endif #include "absl/base/attributes.h" @@ -185,7 +179,8 @@ CountLeadingZeroes64(uint64_t x) { // Handle 0 as a special case because __builtin_clzll(0) is undefined. return x == 0 ? 64 : __builtin_clzll(x); -#elif defined(_MSC_VER) && !defined(__clang__) && defined(_M_X64) +#elif defined(_MSC_VER) && !defined(__clang__) && \ + (defined(_M_X64) || defined(_M_ARM64)) // MSVC does not have __buitin_clzll. Use _BitScanReverse64. unsigned long result = 0; // NOLINT(runtime/int) if (_BitScanReverse64(&result, x)) { @@ -271,7 +266,8 @@ CountTrailingZeroesNonzero64(uint64_t x) { static_assert(sizeof(unsigned long long) == sizeof(x), // NOLINT(runtime/int) "__builtin_ctzll does not take 64-bit arg"); return __builtin_ctzll(x); -#elif defined(_MSC_VER) && !defined(__clang__) && defined(_M_X64) +#elif defined(_MSC_VER) && !defined(__clang__) && \ + (defined(_M_X64) || defined(_M_ARM64)) unsigned long result = 0; // NOLINT(runtime/int) _BitScanForward64(&result, x); return result; |