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ppc: Support little endian intreadwrite

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This commit is contained in:
Luca Barbato
2014-08-28 19:40:45 +02:00
parent 7968059e5c
commit c19a49e565
1 changed files with 40 additions and 24 deletions
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64
libavutil/ppc/intreadwrite.h
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@ -24,56 +24,81 @@
#include <stdint.h> #include <stdint.h>
#include "config.h" #include "config.h"
/*
* -O0 would compile the packed struct version, which is used by
* default, in an overly verbose fashion, so we override it here.
*/
#if HAVE_BIGENDIAN
#define AV_RB64(p) (*(const uint64_t *)(p))
#define AV_WB64(p, v) (*(uint64_t *)(p) = (v))
#else
#define AV_RL64(p) (*(const uint64_t *)(p))
#define AV_WL64(p, v) (*(uint64_t *)(p) = (v))
#endif
#if HAVE_XFORM_ASM #if HAVE_XFORM_ASM
#define AV_RL16 AV_RL16 #if HAVE_BIGENDIAN
static av_always_inline uint16_t AV_RL16(const void *p) #define AV_RL16 av_read_bswap16
#define AV_WL16 av_write_bswap16
#define AV_RL32 av_read_bswap32
#define AV_WL32 av_write_bswap32
#define AV_RL64 av_read_bswap64
#define AV_WL64 av_write_bswap64
#else
#define AV_RB16 av_read_bswap16
#define AV_WB16 av_write_bswap16
#define AV_RB32 av_read_bswap32
#define AV_WB32 av_write_bswap32
#define AV_RB64 av_read_bswap64
#define AV_WB64 av_write_bswap64
#endif
static av_always_inline uint16_t av_read_bswap16(const void *p)
{ {
uint16_t v; uint16_t v;
__asm__ ("lhbrx %0, %y1" : "=r"(v) : "Z"(*(const uint16_t*)p)); __asm__ ("lhbrx %0, %y1" : "=r"(v) : "Z"(*(const uint16_t*)p));
return v; return v;
} }
#define AV_WL16 AV_WL16 static av_always_inline void av_write_bswap16(void *p, uint16_t v)
static av_always_inline void AV_WL16(void *p, uint16_t v)
{ {
__asm__ ("sthbrx %1, %y0" : "=Z"(*(uint16_t*)p) : "r"(v)); __asm__ ("sthbrx %1, %y0" : "=Z"(*(uint16_t*)p) : "r"(v));
} }
#define AV_RL32 AV_RL32 static av_always_inline uint32_t av_read_bswap32(const void *p)
static av_always_inline uint32_t AV_RL32(const void *p)
{ {
uint32_t v; uint32_t v;
__asm__ ("lwbrx %0, %y1" : "=r"(v) : "Z"(*(const uint32_t*)p)); __asm__ ("lwbrx %0, %y1" : "=r"(v) : "Z"(*(const uint32_t*)p));
return v; return v;
} }
#define AV_WL32 AV_WL32 static av_always_inline void av_write_bswap32(void *p, uint32_t v)
static av_always_inline void AV_WL32(void *p, uint32_t v)
{ {
__asm__ ("stwbrx %1, %y0" : "=Z"(*(uint32_t*)p) : "r"(v)); __asm__ ("stwbrx %1, %y0" : "=Z"(*(uint32_t*)p) : "r"(v));
} }
#if HAVE_LDBRX #if HAVE_LDBRX
#define AV_RL64 AV_RL64 static av_always_inline uint64_t av_read_bswap64(const void *p)
static av_always_inline uint64_t AV_RL64(const void *p)
{ {
uint64_t v; uint64_t v;
__asm__ ("ldbrx %0, %y1" : "=r"(v) : "Z"(*(const uint64_t*)p)); __asm__ ("ldbrx %0, %y1" : "=r"(v) : "Z"(*(const uint64_t*)p));
return v; return v;
} }
#define AV_WL64 AV_WL64 static av_always_inline void av_write_bswap64(void *p, uint64_t v)
static av_always_inline void AV_WL64(void *p, uint64_t v)
{ {
__asm__ ("stdbrx %1, %y0" : "=Z"(*(uint64_t*)p) : "r"(v)); __asm__ ("stdbrx %1, %y0" : "=Z"(*(uint64_t*)p) : "r"(v));
} }
#else #else
#define AV_RL64 AV_RL64 static av_always_inline uint64_t av_read_bswap64(const void *p)
static av_always_inline uint64_t AV_RL64(const void *p)
{ {
union { uint64_t v; uint32_t hl[2]; } v; union { uint64_t v; uint32_t hl[2]; } v;
__asm__ ("lwbrx %0, %y2 \n\t" __asm__ ("lwbrx %0, %y2 \n\t"
@ -83,8 +108,7 @@ static av_always_inline uint64_t AV_RL64(const void *p)
return v.v; return v.v;
} }
#define AV_WL64 AV_WL64 static av_always_inline void av_write_bswap64(void *p, uint64_t v)
static av_always_inline void AV_WL64(void *p, uint64_t v)
{ {
union { uint64_t v; uint32_t hl[2]; } vv = { v }; union { uint64_t v; uint32_t hl[2]; } vv = { v };
__asm__ ("stwbrx %2, %y0 \n\t" __asm__ ("stwbrx %2, %y0 \n\t"
@ -97,12 +121,4 @@ static av_always_inline void AV_WL64(void *p, uint64_t v)
#endif /* HAVE_XFORM_ASM */ #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 */ #endif /* AVUTIL_PPC_INTREADWRITE_H */