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#if HAVE_XFORM_ASM
28
29#if HAVE_BIGENDIAN
30#define AV_RL16 av_read_bswap16
31#define AV_WL16 av_write_bswap16
32#define AV_RL32 av_read_bswap32
33#define AV_WL32 av_write_bswap32
34#define AV_RL64 av_read_bswap64
35#define AV_WL64 av_write_bswap64
36
37#else
38#define AV_RB16 av_read_bswap16
39#define AV_WB16 av_write_bswap16
40#define AV_RB32 av_read_bswap32
41#define AV_WB32 av_write_bswap32
42#define AV_RB64 av_read_bswap64
43#define AV_WB64 av_write_bswap64
44
45#endif
46
47static av_always_inline uint16_t av_read_bswap16(const void *p)
48{
49    uint16_t v;
50    __asm__ ("lhbrx   %0, %y1" : "=r"(v) : "Z"(*(const uint16_t*)p));
51    return v;
52}
53
54static av_always_inline void av_write_bswap16(void *p, uint16_t v)
55{
56    __asm__ ("sthbrx  %1, %y0" : "=Z"(*(uint16_t*)p) : "r"(v));
57}
58
59static av_always_inline uint32_t av_read_bswap32(const void *p)
60{
61    uint32_t v;
62    __asm__ ("lwbrx   %0, %y1" : "=r"(v) : "Z"(*(const uint32_t*)p));
63    return v;
64}
65
66static av_always_inline void av_write_bswap32(void *p, uint32_t v)
67{
68    __asm__ ("stwbrx  %1, %y0" : "=Z"(*(uint32_t*)p) : "r"(v));
69}
70
71#if HAVE_LDBRX
72
73static av_always_inline uint64_t av_read_bswap64(const void *p)
74{
75    uint64_t v;
76    __asm__ ("ldbrx   %0, %y1" : "=r"(v) : "Z"(*(const uint64_t*)p));
77    return v;
78}
79
80static av_always_inline void av_write_bswap64(void *p, uint64_t v)
81{
82    __asm__ ("stdbrx  %1, %y0" : "=Z"(*(uint64_t*)p) : "r"(v));
83}
84
85#else
86
87static av_always_inline uint64_t av_read_bswap64(const void *p)
88{
89    union { uint64_t v; uint32_t hl[2]; } v;
90    __asm__ ("lwbrx   %0, %y2  \n\t"
91             "lwbrx   %1, %y3  \n\t"
92             : "=&r"(v.hl[1]), "=r"(v.hl[0])
93             : "Z"(*(const uint32_t*)p), "Z"(*((const uint32_t*)p+1)));
94    return v.v;
95}
96
97static av_always_inline void av_write_bswap64(void *p, uint64_t v)
98{
99    union { uint64_t v; uint32_t hl[2]; } vv = { v };
100    __asm__ ("stwbrx  %2, %y0  \n\t"
101             "stwbrx  %3, %y1  \n\t"
102             : "=Z"(*(uint32_t*)p), "=Z"(*((uint32_t*)p+1))
103             : "r"(vv.hl[1]), "r"(vv.hl[0]));
104}
105
106#endif /* HAVE_LDBRX */
107
108#endif /* HAVE_XFORM_ASM */
109
110#endif /* AVUTIL_PPC_INTREADWRITE_H */
111