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