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ffmpeg / libavutil / ppc / intreadwrite.h @ 80a07f6e

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/*
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 * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef AVUTIL_PPC_INTREADWRITE_H
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#define AVUTIL_PPC_INTREADWRITE_H
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#include <stdint.h>
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#include "config.h"
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#if HAVE_XFORM_ASM
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#define AV_RL16 AV_RL16
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static av_always_inline uint16_t AV_RL16(const void *p)
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{
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    uint16_t v;
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    __asm__ ("lhbrx   %0, %y1" : "=r"(v) : "Z"(*(const uint16_t*)p));
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    return v;
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}
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#define AV_WL16 AV_WL16
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static av_always_inline void AV_WL16(void *p, uint16_t v)
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{
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    __asm__ ("sthbrx  %1, %y0" : "=Z"(*(uint16_t*)p) : "r"(v));
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}
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#define AV_RL32 AV_RL32
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static av_always_inline uint32_t AV_RL32(const void *p)
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{
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    uint32_t v;
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    __asm__ ("lwbrx   %0, %y1" : "=r"(v) : "Z"(*(const uint32_t*)p));
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    return v;
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}
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#define AV_WL32 AV_WL32
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static av_always_inline void AV_WL32(void *p, uint32_t v)
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{
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    __asm__ ("stwbrx  %1, %y0" : "=Z"(*(uint32_t*)p) : "r"(v));
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}
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#if HAVE_LDBRX
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#define AV_RL64 AV_RL64
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static av_always_inline uint64_t AV_RL64(const void *p)
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{
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    uint64_t v;
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    __asm__ ("ldbrx   %0, %y1" : "=r"(v) : "Z"(*(const uint64_t*)p));
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    return v;
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}
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#define AV_WL64 AV_WL64
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static av_always_inline void AV_WL64(void *p, uint64_t v)
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{
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    __asm__ ("stdbrx  %1, %y0" : "=Z"(*(uint64_t*)p) : "r"(v));
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}
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#else
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#define AV_RL64 AV_RL64
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static av_always_inline uint64_t AV_RL64(const void *p)
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{
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    union { uint64_t v; uint32_t hl[2]; } v;
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    __asm__ ("lwbrx   %0, %y2  \n\t"
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             "lwbrx   %1, %y3  \n\t"
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             : "=&r"(v.hl[1]), "=r"(v.hl[0])
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             : "Z"(*(const uint32_t*)p), "Z"(*((const uint32_t*)p+1)));
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    return v.v;
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}
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#define AV_WL64 AV_WL64
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static av_always_inline void AV_WL64(void *p, uint64_t v)
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{
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    union { uint64_t v; uint32_t hl[2]; } vv = { v };
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    __asm__ ("stwbrx  %2, %y0  \n\t"
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             "stwbrx  %3, %y1  \n\t"
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             : "=Z"(*(uint32_t*)p), "=Z"(*((uint32_t*)p+1))
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             : "r"(vv.hl[1]), "r"(vv.hl[0]));
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}
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#endif /* HAVE_LDBRX */
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#endif /* HAVE_XFORM_ASM */
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/*
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 * GCC fails miserably on the packed struct version which is used by
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 * default, so we override it here.
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 */
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#define AV_RB64(p) (*(const uint64_t *)(p))
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#define AV_WB64(p, v) (*(uint64_t *)(p) = (v))
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#endif /* AVUTIL_PPC_INTREADWRITE_H */