diff options
Diffstat (limited to 'libavutil/x86/bswap.h')
| -rw-r--r-- | libavutil/x86/bswap.h | 44 |
1 files changed, 35 insertions, 9 deletions
diff --git a/libavutil/x86/bswap.h b/libavutil/x86/bswap.h index c73be9af81..ffa59e4c82 100644 --- a/libavutil/x86/bswap.h +++ b/libavutil/x86/bswap.h @@ -1,18 +1,18 @@ /* - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * - * Libav is distributed in the hope that it will be useful, + * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -25,21 +25,47 @@ #define AVUTIL_X86_BSWAP_H #include <stdint.h> +#if defined(_MSC_VER) +#include <intrin.h> +#endif #include "config.h" #include "libavutil/attributes.h" -#if HAVE_INLINE_ASM +#if defined(_MSC_VER) + +#define av_bswap16 av_bswap16 +static av_always_inline av_const uint16_t av_bswap16(uint16_t x) +{ + return _rotr16(x, 8); +} + +#define av_bswap32 av_bswap32 +static av_always_inline av_const uint32_t av_bswap32(uint32_t x) +{ + return _byteswap_ulong(x); +} + +#if ARCH_X86_64 +#define av_bswap64 av_bswap64 +static inline uint64_t av_const av_bswap64(uint64_t x) +{ + return _byteswap_uint64(x); +} +#endif + + +#elif HAVE_INLINE_ASM -#if !AV_GCC_VERSION_AT_LEAST(4,1) +#if AV_GCC_VERSION_AT_MOST(4,0) #define av_bswap16 av_bswap16 static av_always_inline av_const unsigned av_bswap16(unsigned x) { __asm__("rorw $8, %w0" : "+r"(x)); return x; } -#endif /* !AV_GCC_VERSION_AT_LEAST(4,1) */ +#endif /* AV_GCC_VERSION_AT_MOST(4,0) */ -#if !AV_GCC_VERSION_AT_LEAST(4,5) +#if AV_GCC_VERSION_AT_MOST(4,4) || defined(__INTEL_COMPILER) #define av_bswap32 av_bswap32 static av_always_inline av_const uint32_t av_bswap32(uint32_t x) { @@ -55,7 +81,7 @@ static inline uint64_t av_const av_bswap64(uint64_t x) return x; } #endif -#endif /* !AV_GCC_VERSION_AT_LEAST(4,5) */ +#endif /* AV_GCC_VERSION_AT_MOST(4,4) */ #endif /* HAVE_INLINE_ASM */ #endif /* AVUTIL_X86_BSWAP_H */ |