PeerStreamer

/*

 * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>

 *

 * This file is part of FFmpeg.

 *

 * FFmpeg is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * FFmpeg is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#ifndef AVUTIL_PPC_INTREADWRITE_H

#define AVUTIL_PPC_INTREADWRITE_H

#include <stdint.h>

#include "config.h"

#if HAVE_XFORM_ASM

#define AV_RL16 AV_RL16

static av_always_inline uint16_t AV_RL16(const void *p)

{

    uint16_t v;

    __asm__ ("lhbrx   %0, %y1" : "=r"(v) : "Z"(*(const uint16_t*)p));

    return v;

}

#define AV_WL16 AV_WL16

static av_always_inline void AV_WL16(void *p, uint16_t v)

{

    __asm__ ("sthbrx  %1, %y0" : "=Z"(*(uint16_t*)p) : "r"(v));

}

#define AV_RL32 AV_RL32

static av_always_inline uint32_t AV_RL32(const void *p)

{

    uint32_t v;

    __asm__ ("lwbrx   %0, %y1" : "=r"(v) : "Z"(*(const uint32_t*)p));

    return v;

}

#define AV_WL32 AV_WL32

static av_always_inline void AV_WL32(void *p, uint32_t v)

{

    __asm__ ("stwbrx  %1, %y0" : "=Z"(*(uint32_t*)p) : "r"(v));

}

#if HAVE_LDBRX

#define AV_RL64 AV_RL64

static av_always_inline uint64_t AV_RL64(const void *p)

{

    uint64_t v;

    __asm__ ("ldbrx   %0, %y1" : "=r"(v) : "Z"(*(const uint64_t*)p));

    return v;

}

#define AV_WL64 AV_WL64

static av_always_inline void AV_WL64(void *p, uint64_t v)

{

    __asm__ ("stdbrx  %1, %y0" : "=Z"(*(uint64_t*)p) : "r"(v));

}

#else

#define AV_RL64 AV_RL64

static av_always_inline uint64_t AV_RL64(const void *p)

{

    union { uint64_t v; uint32_t hl[2]; } v;

    __asm__ ("lwbrx   %0, %y2  \n\t"

             "lwbrx   %1, %y3  \n\t"

             : "=&r"(v.hl[1]), "=r"(v.hl[0])

             : "Z"(*(const uint32_t*)p), "Z"(*((const uint32_t*)p+1)));

    return v.v;

}

#define AV_WL64 AV_WL64

static av_always_inline void AV_WL64(void *p, uint64_t v)

{

    union { uint64_t v; uint32_t hl[2]; } vv = { v };

    __asm__ ("stwbrx  %2, %y0  \n\t"

             "stwbrx  %3, %y1  \n\t"

             : "=Z"(*(uint32_t*)p), "=Z"(*((uint32_t*)p+1))

             : "r"(vv.hl[1]), "r"(vv.hl[0]));

}

#endif /* HAVE_LDBRX */

#endif /* HAVE_XFORM_ASM */

/*

 * GCC fails miserably on the packed struct version which is used by

 * default, so we override it here.

 */

#define AV_RB64(p) (*(const uint64_t *)(p))

#define AV_WB64(p, v) (*(uint64_t *)(p) = (v))

#endif /* AVUTIL_PPC_INTREADWRITE_H */