| /* |
| * 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_INTREADWRITE_H |
| #define AVUTIL_ARM_INTREADWRITE_H |
| |
| #include <stdint.h> |
| #include "config.h" |
| #include "libavutil/attributes.h" |
| |
| #if HAVE_FAST_UNALIGNED && HAVE_INLINE_ASM && !AV_GCC_VERSION_AT_LEAST(4,7) |
| |
| #define AV_RN16 AV_RN16 |
| static av_always_inline unsigned AV_RN16(const void *p) |
| { |
| const uint8_t *q = p; |
| unsigned v; |
| #if !AV_GCC_VERSION_AT_LEAST(4,6) |
| __asm__ ("ldrh %0, %1" : "=r"(v) : "m"(*(const uint16_t *)q)); |
| #elif defined __thumb__ |
| __asm__ ("ldrh %0, %1" : "=r"(v) : "m"(q[0]), "m"(q[1])); |
| #else |
| __asm__ ("ldrh %0, %1" : "=r"(v) : "Uq"(q[0]), "m"(q[1])); |
| #endif |
| return v; |
| } |
| |
| #define AV_WN16 AV_WN16 |
| static av_always_inline void AV_WN16(void *p, uint16_t v) |
| { |
| __asm__ ("strh %1, %0" : "=m"(*(uint16_t *)p) : "r"(v)); |
| } |
| |
| #define AV_RN32 AV_RN32 |
| static av_always_inline uint32_t AV_RN32(const void *p) |
| { |
| const struct __attribute__((packed)) { uint32_t v; } *q = p; |
| uint32_t v; |
| __asm__ ("ldr %0, %1" : "=r"(v) : "m"(*q)); |
| return v; |
| } |
| |
| #define AV_WN32 AV_WN32 |
| static av_always_inline void AV_WN32(void *p, uint32_t v) |
| { |
| __asm__ ("str %1, %0" : "=m"(*(uint32_t *)p) : "r"(v)); |
| } |
| |
| #if HAVE_ASM_MOD_Q |
| |
| #define AV_RN64 AV_RN64 |
| static av_always_inline uint64_t AV_RN64(const void *p) |
| { |
| const struct __attribute__((packed)) { uint32_t v; } *q = p; |
| uint64_t v; |
| __asm__ ("ldr %Q0, %1 \n\t" |
| "ldr %R0, %2 \n\t" |
| : "=&r"(v) |
| : "m"(q[0]), "m"(q[1])); |
| return v; |
| } |
| |
| #define AV_WN64 AV_WN64 |
| static av_always_inline void AV_WN64(void *p, uint64_t v) |
| { |
| __asm__ ("str %Q2, %0 \n\t" |
| "str %R2, %1 \n\t" |
| : "=m"(*(uint32_t*)p), "=m"(*((uint32_t*)p+1)) |
| : "r"(v)); |
| } |
| |
| #endif /* HAVE_ASM_MOD_Q */ |
| |
| #endif /* HAVE_INLINE_ASM */ |
| |
| #endif /* AVUTIL_ARM_INTREADWRITE_H */ |