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_RX16
31#define AV_WL16 AV_WX16
32#define AV_RL32 AV_RX32
33#define AV_WL32 AV_WX32
34#else
35#define AV_RB16 AV_RX16
36#define AV_WB16 AV_WX16
37#define AV_RB32 AV_RX32
38#define AV_WB32 AV_WX32
39#endif
40
41static av_always_inline uint16_t AV_RX16(const void *p)
42{
43    uint16_t v;
44    __asm__ ("lhbrx   %0, %y1" : "=r"(v) : "Z"(*(const uint16_t*)p));
45    return v;
46}
47
48static av_always_inline void AV_WX16(void *p, uint16_t v)
49{
50    __asm__ ("sthbrx  %1, %y0" : "=Z"(*(uint16_t*)p) : "r"(v));
51}
52
53static av_always_inline uint32_t AV_RX32(const void *p)
54{
55    uint32_t v;
56    __asm__ ("lwbrx   %0, %y1" : "=r"(v) : "Z"(*(const uint32_t*)p));
57    return v;
58}
59
60static av_always_inline void AV_WX32(void *p, uint32_t v)
61{
62    __asm__ ("stwbrx  %1, %y0" : "=Z"(*(uint32_t*)p) : "r"(v));
63}
64
65#if HAVE_LDBRX
66
67#if HAVE_BIGENDIAN
68#define AV_RL64 AV_RX64
69#define AV_WL64 AV_WX64
70#else
71#define AV_RB64 AV_RX64
72#define AV_WB64 AV_WX64
73#endif
74
75static av_always_inline uint64_t AV_RX64(const void *p)
76{
77    uint64_t v;
78    __asm__ ("ldbrx   %0, %y1" : "=r"(v) : "Z"(*(const uint64_t*)p));
79    return v;
80}
81
82static av_always_inline void AV_WX64(void *p, uint64_t v)
83{
84    __asm__ ("stdbrx  %1, %y0" : "=Z"(*(uint64_t*)p) : "r"(v));
85}
86
87#else
88
89#define AV_RL64 AV_RL64
90static av_always_inline uint64_t AV_RL64(const void *p)
91{
92    union { uint64_t v; uint32_t hl[2]; } v;
93    __asm__ ("lwbrx   %0, %y2  \n\t"
94             "lwbrx   %1, %y3  \n\t"
95             : "=&r"(v.hl[1]), "=r"(v.hl[0])
96             : "Z"(*(const uint32_t*)p), "Z"(*((const uint32_t*)p+1)));
97    return v.v;
98}
99
100#define AV_WL64 AV_WL64
101static av_always_inline void AV_WL64(void *p, uint64_t v)
102{
103    union { uint64_t v; uint32_t hl[2]; } vv = { v };
104    __asm__ ("stwbrx  %2, %y0  \n\t"
105             "stwbrx  %3, %y1  \n\t"
106             : "=Z"(*(uint32_t*)p), "=Z"(*((uint32_t*)p+1))
107             : "r"(vv.hl[1]), "r"(vv.hl[0]));
108}
109
110#endif /* HAVE_LDBRX */
111
112#endif /* HAVE_XFORM_ASM */
113
114/*
115 * GCC fails miserably on the packed struct version which is used by
116 * default, so we override it here.
117 */
118
119#if HAVE_BIGENDIAN
120#define AV_RB64(p) (*(const uint64_t *)(p))
121#define AV_WB64(p, v) (*(uint64_t *)(p) = (v))
122#endif
123
124#endif /* AVUTIL_PPC_INTREADWRITE_H */
125