nengel@2: /*
nengel@2:  * This file is part of FFmpeg.
nengel@2:  *
nengel@2:  * FFmpeg is free software; you can redistribute it and/or
nengel@2:  * modify it under the terms of the GNU Lesser General Public
nengel@2:  * License as published by the Free Software Foundation; either
nengel@2:  * version 2.1 of the License, or (at your option) any later version.
nengel@2:  *
nengel@2:  * FFmpeg is distributed in the hope that it will be useful,
nengel@2:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
nengel@2:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
nengel@2:  * Lesser General Public License for more details.
nengel@2:  *
nengel@2:  * You should have received a copy of the GNU Lesser General Public
nengel@2:  * License along with FFmpeg; if not, write to the Free Software
nengel@2:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
nengel@2:  */
nengel@2: 
nengel@2: /**
nengel@2:  * @file
nengel@2:  * byte swapping routines
nengel@2:  */
nengel@2: 
nengel@2: #ifndef AVUTIL_X86_BSWAP_H
nengel@2: #define AVUTIL_X86_BSWAP_H
nengel@2: 
nengel@2: #include <stdint.h>
nengel@2: #include "config.h"
nengel@2: #include "libavutil/attributes.h"
nengel@2: 
nengel@2: #define bswap_16 bswap_16
nengel@2: static av_always_inline av_const uint16_t bswap_16(uint16_t x)
nengel@2: {
nengel@2:     __asm__("rorw $8, %0" : "+r"(x));
nengel@2:     return x;
nengel@2: }
nengel@2: 
nengel@2: #define bswap_32 bswap_32
nengel@2: static av_always_inline av_const uint32_t bswap_32(uint32_t x)
nengel@2: {
nengel@2: // #if HAVE_BSWAP
nengel@2:     __asm__("bswap   %0" : "+r" (x));
nengel@2: // #else
nengel@2: //     __asm__("rorw    $8,  %w0 \n\t"
nengel@2: //             "rorl    $16, %0  \n\t"
nengel@2: //             "rorw    $8,  %w0"
nengel@2: //             : "+r"(x));
nengel@2: // #endif
nengel@2:     return x;
nengel@2: }
nengel@2: 
nengel@2: #if ARCH_X86_64
nengel@2: #define bswap_64 bswap_64
nengel@2: static inline uint64_t av_const bswap_64(uint64_t x)
nengel@2: {
nengel@2:     __asm__("bswap  %0": "=r" (x) : "0" (x));
nengel@2:     return x;
nengel@2: }
nengel@2: #endif
nengel@2: 
nengel@2: #endif /* AVUTIL_X86_BSWAP_H */