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: #ifndef AVUTIL_ARM_BSWAP_H
nengel@2: #define AVUTIL_ARM_BSWAP_H
nengel@2: 
nengel@2: #include <stdint.h>
nengel@2: #include "config.h"
nengel@2: #include "libavutil/attributes.h"
nengel@2: 
nengel@2: #ifdef __ARMCC_VERSION
nengel@2: 
nengel@2: #if HAVE_ARMV6
nengel@2: #define bswap_16 bswap_16
nengel@2: static av_always_inline av_const unsigned bswap_16(unsigned x)
nengel@2: {
nengel@2:     __asm { rev16 x, 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:     return __rev(x);
nengel@2: }
nengel@2: #endif /* HAVE_ARMV6 */
nengel@2: 
nengel@2: #elif HAVE_INLINE_ASM
nengel@2: 
nengel@2: #if HAVE_ARMV6
nengel@2: #define bswap_16 bswap_16
nengel@2: static av_always_inline av_const unsigned bswap_16(unsigned x)
nengel@2: {
nengel@2:     __asm__("rev16 %0, %0" : "+r"(x));
nengel@2:     return x;
nengel@2: }
nengel@2: #endif
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_ARMV6
nengel@2:     __asm__("rev %0, %0" : "+r"(x));
nengel@2: #else
nengel@2:     uint32_t t;
nengel@2:     __asm__ ("eor %1, %0, %0, ror #16 \n\t"
nengel@2:              "bic %1, %1, #0xFF0000   \n\t"
nengel@2:              "mov %0, %0, ror #8      \n\t"
nengel@2:              "eor %0, %0, %1, lsr #8  \n\t"
nengel@2:              : "+r"(x), "=&r"(t));
nengel@2: #endif /* HAVE_ARMV6 */
nengel@2:     return x;
nengel@2: }
nengel@2: 
nengel@2: #endif /* __ARMCC_VERSION */
nengel@2: 
nengel@2: #endif /* AVUTIL_ARM_BSWAP_H */