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annotate libavutil/ppc/intreadwrite.h @ 9:ea1ba68cf0ed

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update to match api changes + add sscc produced source
author Nina Engelhardt <nengel@mailbox.tu-berlin.de>
date Wed, 05 Jun 2013 14:43:26 +0200
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nengel@2 1 /*
nengel@2 2 * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
nengel@2 3 *
nengel@2 4 * This file is part of FFmpeg.
nengel@2 5 *
nengel@2 6 * FFmpeg is free software; you can redistribute it and/or
nengel@2 7 * modify it under the terms of the GNU Lesser General Public
nengel@2 8 * License as published by the Free Software Foundation; either
nengel@2 9 * version 2.1 of the License, or (at your option) any later version.
nengel@2 10 *
nengel@2 11 * FFmpeg is distributed in the hope that it will be useful,
nengel@2 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
nengel@2 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
nengel@2 14 * Lesser General Public License for more details.
nengel@2 15 *
nengel@2 16 * You should have received a copy of the GNU Lesser General Public
nengel@2 17 * License along with FFmpeg; if not, write to the Free Software
nengel@2 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
nengel@2 19 */
nengel@2 20
nengel@2 21 #ifndef AVUTIL_PPC_INTREADWRITE_H
nengel@2 22 #define AVUTIL_PPC_INTREADWRITE_H
nengel@2 23
nengel@2 24 #include <stdint.h>
nengel@2 25 #include "config.h"
nengel@2 26
nengel@2 27 #if HAVE_XFORM_ASM
nengel@2 28
nengel@2 29 #define AV_RL16 AV_RL16
nengel@2 30 static av_always_inline uint16_t AV_RL16(const void *p)
nengel@2 31 {
nengel@2 32 uint16_t v;
nengel@2 33 __asm__ ("lhbrx %0, %y1" : "=r"(v) : "Z"(*(const uint16_t*)p));
nengel@2 34 return v;
nengel@2 35 }
nengel@2 36
nengel@2 37 #define AV_WL16 AV_WL16
nengel@2 38 static av_always_inline void AV_WL16(void *p, uint16_t v)
nengel@2 39 {
nengel@2 40 __asm__ ("sthbrx %1, %y0" : "=Z"(*(uint16_t*)p) : "r"(v));
nengel@2 41 }
nengel@2 42
nengel@2 43 #define AV_RL32 AV_RL32
nengel@2 44 static av_always_inline uint32_t AV_RL32(const void *p)
nengel@2 45 {
nengel@2 46 uint32_t v;
nengel@2 47 __asm__ ("lwbrx %0, %y1" : "=r"(v) : "Z"(*(const uint32_t*)p));
nengel@2 48 return v;
nengel@2 49 }
nengel@2 50
nengel@2 51 #define AV_WL32 AV_WL32
nengel@2 52 static av_always_inline void AV_WL32(void *p, uint32_t v)
nengel@2 53 {
nengel@2 54 __asm__ ("stwbrx %1, %y0" : "=Z"(*(uint32_t*)p) : "r"(v));
nengel@2 55 }
nengel@2 56
nengel@2 57 #if HAVE_LDBRX
nengel@2 58
nengel@2 59 #define AV_RL64 AV_RL64
nengel@2 60 static av_always_inline uint64_t AV_RL64(const void *p)
nengel@2 61 {
nengel@2 62 uint64_t v;
nengel@2 63 __asm__ ("ldbrx %0, %y1" : "=r"(v) : "Z"(*(const uint64_t*)p));
nengel@2 64 return v;
nengel@2 65 }
nengel@2 66
nengel@2 67 #define AV_WL64 AV_WL64
nengel@2 68 static av_always_inline void AV_WL64(void *p, uint64_t v)
nengel@2 69 {
nengel@2 70 __asm__ ("stdbrx %1, %y0" : "=Z"(*(uint64_t*)p) : "r"(v));
nengel@2 71 }
nengel@2 72
nengel@2 73 #else
nengel@2 74
nengel@2 75 #define AV_RL64 AV_RL64
nengel@2 76 static av_always_inline uint64_t AV_RL64(const void *p)
nengel@2 77 {
nengel@2 78 union { uint64_t v; uint32_t hl[2]; } v;
nengel@2 79 __asm__ ("lwbrx %0, %y2 \n\t"
nengel@2 80 "lwbrx %1, %y3 \n\t"
nengel@2 81 : "=&r"(v.hl[1]), "=r"(v.hl[0])
nengel@2 82 : "Z"(*(const uint32_t*)p), "Z"(*((const uint32_t*)p+1)));
nengel@2 83 return v.v;
nengel@2 84 }
nengel@2 85
nengel@2 86 #define AV_WL64 AV_WL64
nengel@2 87 static av_always_inline void AV_WL64(void *p, uint64_t v)
nengel@2 88 {
nengel@2 89 union { uint64_t v; uint32_t hl[2]; } vv = { v };
nengel@2 90 __asm__ ("stwbrx %2, %y0 \n\t"
nengel@2 91 "stwbrx %3, %y1 \n\t"
nengel@2 92 : "=Z"(*(uint32_t*)p), "=Z"(*((uint32_t*)p+1))
nengel@2 93 : "r"(vv.hl[1]), "r"(vv.hl[0]));
nengel@2 94 }
nengel@2 95
nengel@2 96 #endif /* HAVE_LDBRX */
nengel@2 97
nengel@2 98 #endif /* HAVE_XFORM_ASM */
nengel@2 99
nengel@2 100 /*
nengel@2 101 * GCC fails miserably on the packed struct version which is used by
nengel@2 102 * default, so we override it here.
nengel@2 103 */
nengel@2 104
nengel@2 105 #define AV_RB64(p) (*(const uint64_t *)(p))
nengel@2 106 #define AV_WB64(p, v) (*(uint64_t *)(p) = (v))
nengel@2 107
nengel@2 108 #endif /* AVUTIL_PPC_INTREADWRITE_H */