/* * 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 */ #ifndef AVUTIL_ARM_BSWAP_H #define AVUTIL_ARM_BSWAP_H #include <stdint.h> #include "config.h" #include "libavutil/attributes.h" #ifdef __ARMCC_VERSION #if HAVE_ARMV6 #define av_bswap16 av_bswap16 static av_always_inline av_const unsigned av_bswap16(unsigned x) { __asm { rev16 x, x } return x; } #define av_bswap32 av_bswap32 static av_always_inline av_const uint32_t av_bswap32(uint32_t x) { return __rev(x); } #endif /* HAVE_ARMV6 */ #elif HAVE_INLINE_ASM #if HAVE_ARMV6 #define av_bswap16 av_bswap16 static av_always_inline av_const unsigned av_bswap16(unsigned x) { __asm__("rev16 %0, %0" : "+r"(x)); return x; } #endif #define av_bswap32 av_bswap32 static av_always_inline av_const uint32_t av_bswap32(uint32_t x) { #if HAVE_ARMV6 __asm__("rev %0, %0" : "+r"(x)); #else uint32_t t; __asm__ ("eor %1, %0, %0, ror #16 \n\t" "bic %1, %1, #0xFF0000 \n\t" "mov %0, %0, ror #8 \n\t" "eor %0, %0, %1, lsr #8 \n\t" : "+r"(x), "=&r"(t)); #endif /* HAVE_ARMV6 */ return x; } #endif /* __ARMCC_VERSION */ #endif /* AVUTIL_ARM_BSWAP_H */