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