[SCM] libav/experimental: ppc generic prefetch
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 15:52:11 UTC 2013
The following commit has been merged in the experimental branch:
commit a5db5bda07fa3cec06024d1e18fcbcb855a37d37
Author: Luca Barbato <lu_zero at gentoo.org>
Date: Thu Oct 12 10:26:07 2006 +0000
ppc generic prefetch
Originally committed as revision 6669 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/libavcodec/ppc/dsputil_ppc.c b/libavcodec/ppc/dsputil_ppc.c
index 48076d2..b8502a0 100644
--- a/libavcodec/ppc/dsputil_ppc.c
+++ b/libavcodec/ppc/dsputil_ppc.c
@@ -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;
--
Libav/FFmpeg packaging
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