repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * This file is part of FFmpeg. | |
| 3 | * | |
| 4 | * FFmpeg is free software; you can redistribute it and/or | |
| 5 | * modify it under the terms of the GNU Lesser General Public | |
| 6 | * License as published by the Free Software Foundation; either | |
| 7 | * version 2.1 of the License, or (at your option) any later version. | |
| 8 | * | |
| 9 | * FFmpeg is distributed in the hope that it will be useful, | |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | * Lesser General Public License for more details. | |
| 13 | * | |
| 14 | * You should have received a copy of the GNU Lesser General Public | |
| 15 | * License along with FFmpeg; if not, write to the Free Software | |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 17 | */ | |
| 18 | ||
| 19 | #ifndef AVUTIL_ARM_INTREADWRITE_H | |
| 20 | #define AVUTIL_ARM_INTREADWRITE_H | |
| 21 | ||
| 22 | #include <stdint.h> | |
| 23 | #include "config.h" | |
| 24 | #include "libavutil/attributes.h" | |
| 25 | ||
| 26 | #if HAVE_FAST_UNALIGNED && HAVE_INLINE_ASM && !AV_GCC_VERSION_AT_LEAST(4,7) | |
| 27 | ||
| 28 | #define AV_RN16 AV_RN16 | |
| 29 | static av_always_inline unsigned AV_RN16(const void *p) | |
| 30 | { | |
| 31 | const uint8_t *q = p; | |
| 32 | unsigned v; | |
| 33 | #if !AV_GCC_VERSION_AT_LEAST(4,6) | |
| 34 | __asm__ ("ldrh %0, %1" : "=r"(v) : "m"(*(const uint16_t *)q)); | |
| 35 | #elif defined __thumb__ | |
| 36 | __asm__ ("ldrh %0, %1" : "=r"(v) : "m"(q[0]), "m"(q[1])); | |
| 37 | #else | |
| 38 | __asm__ ("ldrh %0, %1" : "=r"(v) : "Uq"(q[0]), "m"(q[1])); | |
| 39 | #endif | |
| 40 | return v; | |
| 41 | } | |
| 42 | ||
| 43 | #define AV_WN16 AV_WN16 | |
| 44 | static av_always_inline void AV_WN16(void *p, uint16_t v) | |
| 45 | { | |
| 46 | __asm__ ("strh %1, %0" : "=m"(*(uint16_t *)p) : "r"(v)); | |
| 47 | } | |
| 48 | ||
| 49 | #define AV_RN32 AV_RN32 | |
| 50 | static av_always_inline uint32_t AV_RN32(const void *p) | |
| 51 | { | |
| 52 | const struct __attribute__((packed)) { uint32_t v; } *q = p; | |
| 53 | uint32_t v; | |
| 54 | __asm__ ("ldr %0, %1" : "=r"(v) : "m"(*q)); | |
| 55 | return v; | |
| 56 | } | |
| 57 | ||
| 58 | #define AV_WN32 AV_WN32 | |
| 59 | static av_always_inline void AV_WN32(void *p, uint32_t v) | |
| 60 | { | |
| 61 | __asm__ ("str %1, %0" : "=m"(*(uint32_t *)p) : "r"(v)); | |
| 62 | } | |
| 63 | ||
| 64 | #if HAVE_ASM_MOD_Q | |
| 65 | ||
| 66 | #define AV_RN64 AV_RN64 | |
| 67 | static av_always_inline uint64_t AV_RN64(const void *p) | |
| 68 | { | |
| 69 | const struct __attribute__((packed)) { uint32_t v; } *q = p; | |
| 70 | uint64_t v; | |
| 71 | __asm__ ("ldr %Q0, %1 \n\t" | |
| 72 | "ldr %R0, %2 \n\t" | |
| 73 | : "=&r"(v) | |
| 74 | : "m"(q[0]), "m"(q[1])); | |
| 75 | return v; | |
| 76 | } | |
| 77 | ||
| 78 | #define AV_WN64 AV_WN64 | |
| 79 | static av_always_inline void AV_WN64(void *p, uint64_t v) | |
| 80 | { | |
| 81 | __asm__ ("str %Q2, %0 \n\t" | |
| 82 | "str %R2, %1 \n\t" | |
| 83 | : "=m"(*(uint32_t*)p), "=m"(*((uint32_t*)p+1)) | |
| 84 | : "r"(v)); | |
| 85 | } | |
| 86 | ||
| 87 | #endif /* HAVE_ASM_MOD_Q */ | |
| 88 | ||
| 89 | #endif /* HAVE_INLINE_ASM */ | |
| 90 | ||
| 91 | #endif /* AVUTIL_ARM_INTREADWRITE_H */ |