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ppc generic prefetch

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Originally committed as revision 6669 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Luca Barbato 2006-10-12 10:26:07 +00:00
parent a0490b324a
commit a5db5bda07
1 changed files with 10 additions and 1 deletions
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11
libavcodec/ppc/dsputil_ppc.c
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@ -249,10 +249,19 @@ long check_dcbzl_effect(void)
}
#endif
static void prefetch_ppc(void *mem, int stride, int h)
{
register const uint8_t *p = mem;
do {
asm volatile ("dcbt 0,%0" : : "r" (p));
p+= stride;
} while(--h);
}
void dsputil_init_ppc(DSPContext* c, AVCodecContext *avctx)
{
// Common optimizations whether Altivec is available or not
c->prefetch = prefetch_ppc;
switch (check_dcbzl_effect()) {
case 32:
c->clear_blocks = clear_blocks_dcbz32_ppc;