Commit | Line | Data |
---|---|---|
2ba45a60 DM |
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 */ |