| 1 | /* |
| 2 | * Copyright (c) 2008 Mans Rullgard <mans@mansr.com> |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #ifndef AVUTIL_PPC_INTREADWRITE_H |
| 22 | #define AVUTIL_PPC_INTREADWRITE_H |
| 23 | |
| 24 | #include <stdint.h> |
| 25 | #include "config.h" |
| 26 | |
| 27 | /* |
| 28 | * -O0 would compile the packed struct version, which is used by |
| 29 | * default, in an overly verbose fashion, so we override it here. |
| 30 | */ |
| 31 | #if HAVE_BIGENDIAN |
| 32 | #define AV_RB64(p) (*(const uint64_t *)(p)) |
| 33 | #define AV_WB64(p, v) (*(uint64_t *)(p) = (v)) |
| 34 | |
| 35 | #else |
| 36 | #define AV_RL64(p) (*(const uint64_t *)(p)) |
| 37 | #define AV_WL64(p, v) (*(uint64_t *)(p) = (v)) |
| 38 | |
| 39 | #endif |
| 40 | |
| 41 | #if HAVE_XFORM_ASM |
| 42 | |
| 43 | #if HAVE_BIGENDIAN |
| 44 | #define AV_RL16 av_read_bswap16 |
| 45 | #define AV_WL16 av_write_bswap16 |
| 46 | #define AV_RL32 av_read_bswap32 |
| 47 | #define AV_WL32 av_write_bswap32 |
| 48 | #define AV_RL64 av_read_bswap64 |
| 49 | #define AV_WL64 av_write_bswap64 |
| 50 | |
| 51 | #else |
| 52 | #define AV_RB16 av_read_bswap16 |
| 53 | #define AV_WB16 av_write_bswap16 |
| 54 | #define AV_RB32 av_read_bswap32 |
| 55 | #define AV_WB32 av_write_bswap32 |
| 56 | #define AV_RB64 av_read_bswap64 |
| 57 | #define AV_WB64 av_write_bswap64 |
| 58 | |
| 59 | #endif |
| 60 | |
| 61 | static av_always_inline uint16_t av_read_bswap16(const void *p) |
| 62 | { |
| 63 | uint16_t v; |
| 64 | __asm__ ("lhbrx %0, %y1" : "=r"(v) : "Z"(*(const uint16_t*)p)); |
| 65 | return v; |
| 66 | } |
| 67 | |
| 68 | static av_always_inline void av_write_bswap16(void *p, uint16_t v) |
| 69 | { |
| 70 | __asm__ ("sthbrx %1, %y0" : "=Z"(*(uint16_t*)p) : "r"(v)); |
| 71 | } |
| 72 | |
| 73 | static av_always_inline uint32_t av_read_bswap32(const void *p) |
| 74 | { |
| 75 | uint32_t v; |
| 76 | __asm__ ("lwbrx %0, %y1" : "=r"(v) : "Z"(*(const uint32_t*)p)); |
| 77 | return v; |
| 78 | } |
| 79 | |
| 80 | static av_always_inline void av_write_bswap32(void *p, uint32_t v) |
| 81 | { |
| 82 | __asm__ ("stwbrx %1, %y0" : "=Z"(*(uint32_t*)p) : "r"(v)); |
| 83 | } |
| 84 | |
| 85 | #if HAVE_LDBRX |
| 86 | |
| 87 | static av_always_inline uint64_t av_read_bswap64(const void *p) |
| 88 | { |
| 89 | uint64_t v; |
| 90 | __asm__ ("ldbrx %0, %y1" : "=r"(v) : "Z"(*(const uint64_t*)p)); |
| 91 | return v; |
| 92 | } |
| 93 | |
| 94 | static av_always_inline void av_write_bswap64(void *p, uint64_t v) |
| 95 | { |
| 96 | __asm__ ("stdbrx %1, %y0" : "=Z"(*(uint64_t*)p) : "r"(v)); |
| 97 | } |
| 98 | |
| 99 | #else |
| 100 | |
| 101 | static av_always_inline uint64_t av_read_bswap64(const void *p) |
| 102 | { |
| 103 | union { uint64_t v; uint32_t hl[2]; } v; |
| 104 | __asm__ ("lwbrx %0, %y2 \n\t" |
| 105 | "lwbrx %1, %y3 \n\t" |
| 106 | : "=&r"(v.hl[1]), "=r"(v.hl[0]) |
| 107 | : "Z"(*(const uint32_t*)p), "Z"(*((const uint32_t*)p+1))); |
| 108 | return v.v; |
| 109 | } |
| 110 | |
| 111 | static av_always_inline void av_write_bswap64(void *p, uint64_t v) |
| 112 | { |
| 113 | union { uint64_t v; uint32_t hl[2]; } vv = { v }; |
| 114 | __asm__ ("stwbrx %2, %y0 \n\t" |
| 115 | "stwbrx %3, %y1 \n\t" |
| 116 | : "=Z"(*(uint32_t*)p), "=Z"(*((uint32_t*)p+1)) |
| 117 | : "r"(vv.hl[1]), "r"(vv.hl[0])); |
| 118 | } |
| 119 | |
| 120 | #endif /* HAVE_LDBRX */ |
| 121 | |
| 122 | #endif /* HAVE_XFORM_ASM */ |
| 123 | |
| 124 | #endif /* AVUTIL_PPC_INTREADWRITE_H */ |