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_INTREADWRITE_H
nengel@2: #define AVUTIL_ARM_INTREADWRITE_H
nengel@2: 
nengel@2: #include <stdint.h>
nengel@2: #include "config.h"
nengel@2: 
nengel@2: #if HAVE_FAST_UNALIGNED && HAVE_INLINE_ASM
nengel@2: 
nengel@2: #define AV_RN16 AV_RN16
nengel@2: static av_always_inline uint16_t AV_RN16(const void *p)
nengel@2: {
nengel@2:     uint16_t v;
nengel@2:     __asm__ ("ldrh %0, %1" : "=r"(v) : "m"(*(const uint16_t *)p));
nengel@2:     return v;
nengel@2: }
nengel@2: 
nengel@2: #define AV_WN16 AV_WN16
nengel@2: static av_always_inline void AV_WN16(void *p, uint16_t v)
nengel@2: {
nengel@2:     __asm__ ("strh %1, %0" : "=m"(*(uint16_t *)p) : "r"(v));
nengel@2: }
nengel@2: 
nengel@2: #define AV_RN32 AV_RN32
nengel@2: static av_always_inline uint32_t AV_RN32(const void *p)
nengel@2: {
nengel@2:     uint32_t v;
nengel@2:     __asm__ ("ldr  %0, %1" : "=r"(v) : "m"(*(const uint32_t *)p));
nengel@2:     return v;
nengel@2: }
nengel@2: 
nengel@2: #define AV_WN32 AV_WN32
nengel@2: static av_always_inline void AV_WN32(void *p, uint32_t v)
nengel@2: {
nengel@2:     __asm__ ("str  %1, %0" : "=m"(*(uint32_t *)p) : "r"(v));
nengel@2: }
nengel@2: 
nengel@2: #define AV_RN64 AV_RN64
nengel@2: static av_always_inline uint64_t AV_RN64(const void *p)
nengel@2: {
nengel@2:     union { uint64_t v; uint32_t hl[2]; } v;
nengel@2:     __asm__ ("ldr   %0, %2  \n\t"
nengel@2:              "ldr   %1, %3  \n\t"
nengel@2:              : "=&r"(v.hl[0]), "=r"(v.hl[1])
nengel@2:              : "m"(*(const uint32_t*)p), "m"(*((const uint32_t*)p+1)));
nengel@2:     return v.v;
nengel@2: }
nengel@2: 
nengel@2: #define AV_WN64 AV_WN64
nengel@2: static av_always_inline void AV_WN64(void *p, uint64_t v)
nengel@2: {
nengel@2:     union { uint64_t v; uint32_t hl[2]; } vv = { v };
nengel@2:     __asm__ ("str  %2, %0  \n\t"
nengel@2:              "str  %3, %1  \n\t"
nengel@2:              : "=m"(*(uint32_t*)p), "=m"(*((uint32_t*)p+1))
nengel@2:              : "r"(vv.hl[0]), "r"(vv.hl[1]));
nengel@2: }
nengel@2: 
nengel@2: #endif /* HAVE_INLINE_ASM */
nengel@2: 
nengel@2: #endif /* AVUTIL_ARM_INTREADWRITE_H */