diff options
Diffstat (limited to 'absl/numeric/internal/bits.h')
| -rw-r--r-- | absl/numeric/internal/bits.h | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/absl/numeric/internal/bits.h b/absl/numeric/internal/bits.h index af45700f..e51941d7 100644 --- a/absl/numeric/internal/bits.h +++ b/absl/numeric/internal/bits.h @@ -28,8 +28,15 @@ #include "absl/base/attributes.h" #include "absl/base/config.h" -#if ABSL_HAVE_BUILTIN(__builtin_popcountl) && \ - ABSL_HAVE_BUILTIN(__builtin_popcountll) +#if defined(__GNUC__) && !defined(__clang__) +// GCC +#define ABSL_NUMERIC_INTERNAL_HAVE_BUILTIN_OR_GCC(x) 1 +#else +#define ABSL_NUMERIC_INTERNAL_HAVE_BUILTIN_OR_GCC(x) ABSL_HAVE_BUILTIN(x) +#endif + +#if ABSL_NUMERIC_INTERNAL_HAVE_BUILTIN_OR_GCC(__builtin_popcountl) && \ + ABSL_NUMERIC_INTERNAL_HAVE_BUILTIN_OR_GCC(__builtin_popcountll) #define ABSL_INTERNAL_CONSTEXPR_POPCOUNT constexpr #define ABSL_INTERNAL_HAS_CONSTEXPR_POPCOUNT 1 #else @@ -37,7 +44,8 @@ #define ABSL_INTERNAL_HAS_CONSTEXPR_POPCOUNT 0 #endif -#if ABSL_HAVE_BUILTIN(__builtin_clz) && ABSL_HAVE_BUILTIN(__builtin_clzll) +#if ABSL_NUMERIC_INTERNAL_HAVE_BUILTIN_OR_GCC(__builtin_clz) && \ + ABSL_NUMERIC_INTERNAL_HAVE_BUILTIN_OR_GCC(__builtin_clzll) #define ABSL_INTERNAL_CONSTEXPR_CLZ constexpr #define ABSL_INTERNAL_HAS_CONSTEXPR_CLZ 1 #else @@ -45,7 +53,8 @@ #define ABSL_INTERNAL_HAS_CONSTEXPR_CLZ 0 #endif -#if ABSL_HAVE_BUILTIN(__builtin_ctz) && ABSL_HAVE_BUILTIN(__builtin_ctzll) +#if ABSL_NUMERIC_INTERNAL_HAVE_BUILTIN_OR_GCC(__builtin_ctz) && \ + ABSL_NUMERIC_INTERNAL_HAVE_BUILTIN_OR_GCC(__builtin_ctzll) #define ABSL_INTERNAL_CONSTEXPR_CTZ constexpr #define ABSL_INTERNAL_HAS_CONSTEXPR_CTZ 1 #else @@ -85,7 +94,7 @@ ABSL_MUST_USE_RESULT ABSL_ATTRIBUTE_ALWAYS_INLINE constexpr T RotateLeft( ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_POPCOUNT inline int Popcount32(uint32_t x) noexcept { -#if ABSL_HAVE_BUILTIN(__builtin_popcount) +#if ABSL_NUMERIC_INTERNAL_HAVE_BUILTIN_OR_GCC(__builtin_popcount) static_assert(sizeof(unsigned int) == sizeof(x), "__builtin_popcount does not take 32-bit arg"); return __builtin_popcount(x); @@ -98,7 +107,7 @@ Popcount32(uint32_t x) noexcept { ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_POPCOUNT inline int Popcount64(uint64_t x) noexcept { -#if ABSL_HAVE_BUILTIN(__builtin_popcountll) +#if ABSL_NUMERIC_INTERNAL_HAVE_BUILTIN_OR_GCC(__builtin_popcountll) static_assert(sizeof(unsigned long long) == sizeof(x), // NOLINT(runtime/int) "__builtin_popcount does not take 64-bit arg"); return __builtin_popcountll(x); @@ -122,7 +131,7 @@ Popcount(T x) noexcept { ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_CLZ inline int CountLeadingZeroes32(uint32_t x) { -#if ABSL_HAVE_BUILTIN(__builtin_clz) +#if ABSL_NUMERIC_INTERNAL_HAVE_BUILTIN_OR_GCC(__builtin_clz) // Use __builtin_clz, which uses the following instructions: // x86: bsr, lzcnt // ARM64: clz @@ -169,7 +178,7 @@ CountLeadingZeroes16(uint16_t x) { ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_CLZ inline int CountLeadingZeroes64(uint64_t x) { -#if ABSL_HAVE_BUILTIN(__builtin_clzll) +#if ABSL_NUMERIC_INTERNAL_HAVE_BUILTIN_OR_GCC(__builtin_clzll) // Use __builtin_clzll, which uses the following instructions: // x86: bsr, lzcnt // ARM64: clz @@ -240,7 +249,7 @@ CountLeadingZeroes(T x) { ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_CTZ inline int CountTrailingZeroesNonzero32(uint32_t x) { -#if ABSL_HAVE_BUILTIN(__builtin_ctz) +#if ABSL_NUMERIC_INTERNAL_HAVE_BUILTIN_OR_GCC(__builtin_ctz) static_assert(sizeof(unsigned int) == sizeof(x), "__builtin_ctz does not take 32-bit arg"); return __builtin_ctz(x); @@ -262,7 +271,7 @@ CountTrailingZeroesNonzero32(uint32_t x) { ABSL_ATTRIBUTE_ALWAYS_INLINE ABSL_INTERNAL_CONSTEXPR_CTZ inline int CountTrailingZeroesNonzero64(uint64_t x) { -#if ABSL_HAVE_BUILTIN(__builtin_ctzll) +#if ABSL_NUMERIC_INTERNAL_HAVE_BUILTIN_OR_GCC(__builtin_ctzll) static_assert(sizeof(unsigned long long) == sizeof(x), // NOLINT(runtime/int) "__builtin_ctzll does not take 64-bit arg"); return __builtin_ctzll(x); |