/* * This file is part of FFmpeg. * * 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. * * 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 FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file bswap.h * byte swapping routines */ #ifndef AVUTIL_X86_BSWAP_H #define AVUTIL_X86_BSWAP_H #include <stdint.h> #include "config.h" #include "libavutil/common.h" #define bswap_16 bswap_16 static av_always_inline av_const uint16_t bswap_16(uint16_t x) { __asm__("rorw $8, %0" : "+r"(x)); return x; } #define bswap_32 bswap_32 static av_always_inline av_const uint32_t bswap_32(uint32_t x) { #ifdef HAVE_BSWAP __asm__("bswap %0" : "+r" (x)); #else __asm__("rorw $8, %w0 \n\t" "rorl $16, %0 \n\t" "rorw $8, %w0" : "+r"(x)); #endif return x; } #ifdef ARCH_X86_64 #define bswap_64 bswap_64 static inline uint64_t av_const bswap_64(uint64_t x) { __asm__("bswap %0": "=r" (x) : "0" (x)); return x; } #endif #endif /* AVUTIL_X86_BSWAP_H */