diff options
Diffstat (limited to 'c/common/platform.h')
| -rwxr-xr-x | c/common/platform.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/c/common/platform.h b/c/common/platform.h index 2633e04..ca79359 100755 --- a/c/common/platform.h +++ b/c/common/platform.h @@ -41,6 +41,10 @@ #define BROTLI_X_BIG_ENDIAN BIG_ENDIAN #endif +#if BROTLI_MSVC_VERSION_CHECK(12, 0, 0) +#include <intrin.h> +#endif + #if defined(BROTLI_ENABLE_LOG) || defined(BROTLI_DEBUG) #include <assert.h> #include <stdio.h> @@ -522,6 +526,36 @@ BROTLI_MIN_MAX(size_t) BROTLI_MIN_MAX(uint32_t) BROTLI_MIN_MAX(uint8_t) (A)[(J)] = __brotli_swap_tmp; \ } +#if BROTLI_64_BITS +#if BROTLI_GNUC_HAS_BUILTIN(__builtin_ctzll, 3, 4, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) +#define BROTLI_TZCNT64 __builtin_ctzll +#elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0) +#if defined(BROTLI_TARGET_X64) +#define BROTLI_TZCNT64 _tzcnt_u64 +#else /* BROTLI_TARGET_X64 */ +static BROTLI_INLINE uint32_t BrotliBsf64Msvc(uint64_t x) { + uint32_t lsb; + _BitScanForward64(&lsb, x); + return lsb; +} +#define BROTLI_TZCNT64 BrotliBsf64Msvc +#endif /* BROTLI_TARGET_X64 */ +#endif /* __builtin_ctzll */ +#endif /* BROTLI_64_BITS */ + +#if BROTLI_GNUC_HAS_BUILTIN(__builtin_clz, 3, 4, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) +#define BROTLI_BSR32(x) (31u ^ (uint32_t)__builtin_clz(x)) +#elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0) +static BROTLI_INLINE uint32_t BrotliBsr32Msvc(uint32_t x) { + uint32_t msb; + _BitScanReverse(&msb, x); + return msb; +} +#define BROTLI_BSR32 BrotliBsr32Msvc +#endif /* __builtin_clz */ + /* Default brotli_alloc_func */ static void* BrotliDefaultAllocFunc(void* opaque, size_t size) { BROTLI_UNUSED(opaque); |