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rounding bugfix

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Originally committed as revision 409 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-04-21 22:41:49 +00:00
parent 8b4c7dbc55
commit ba8d0be99d
1 changed files with 6 additions and 0 deletions
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6
libavcodec/i386/motion_est_mmx.c
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@ -19,6 +19,7 @@
* mostly by Michael Niedermayer <michaelni@gmx.at> * mostly by Michael Niedermayer <michaelni@gmx.at>
*/ */
#include "../dsputil.h" #include "../dsputil.h"
#include "../mangle.h"
static const __attribute__ ((aligned(8))) UINT64 round_tab[3]={ static const __attribute__ ((aligned(8))) UINT64 round_tab[3]={
0x0000000000000000, 0x0000000000000000,
@ -26,6 +27,8 @@ static const __attribute__ ((aligned(8))) UINT64 round_tab[3]={
0x0002000200020002, 0x0002000200020002,
}; };
static __attribute__ ((aligned(8))) uint64_t bone= 0x0101010101010101LL;
static inline void sad8_mmx(UINT8 *blk1, UINT8 *blk2, int stride, int h) static inline void sad8_mmx(UINT8 *blk1, UINT8 *blk2, int stride, int h)
{ {
int len= -(stride<<h); int len= -(stride<<h);
@ -115,6 +118,7 @@ static inline void sad8_4_mmx2(UINT8 *blk1, UINT8 *blk2, int stride, int h)
int len= -(stride<<h); int len= -(stride<<h);
asm volatile( asm volatile(
".balign 16 \n\t" ".balign 16 \n\t"
"movq "MANGLE(bone)", %%mm5 \n\t"
"1: \n\t" "1: \n\t"
"movq (%1, %%eax), %%mm0 \n\t" "movq (%1, %%eax), %%mm0 \n\t"
"movq (%2, %%eax), %%mm2 \n\t" "movq (%2, %%eax), %%mm2 \n\t"
@ -122,6 +126,7 @@ static inline void sad8_4_mmx2(UINT8 *blk1, UINT8 *blk2, int stride, int h)
"movq 1(%2, %%eax), %%mm3 \n\t" "movq 1(%2, %%eax), %%mm3 \n\t"
"pavgb %%mm2, %%mm0 \n\t" "pavgb %%mm2, %%mm0 \n\t"
"pavgb %%mm1, %%mm3 \n\t" "pavgb %%mm1, %%mm3 \n\t"
"psubusb %%mm5, %%mm3 \n\t"
"pavgb %%mm3, %%mm0 \n\t" "pavgb %%mm3, %%mm0 \n\t"
"movq (%3, %%eax), %%mm2 \n\t" "movq (%3, %%eax), %%mm2 \n\t"
"psadbw %%mm2, %%mm0 \n\t" "psadbw %%mm2, %%mm0 \n\t"
@ -132,6 +137,7 @@ static inline void sad8_4_mmx2(UINT8 *blk1, UINT8 *blk2, int stride, int h)
"movq 1(%2, %%eax), %%mm4 \n\t" "movq 1(%2, %%eax), %%mm4 \n\t"
"pavgb %%mm3, %%mm1 \n\t" "pavgb %%mm3, %%mm1 \n\t"
"pavgb %%mm4, %%mm2 \n\t" "pavgb %%mm4, %%mm2 \n\t"
"psubusb %%mm5, %%mm2 \n\t"
"pavgb %%mm1, %%mm2 \n\t" "pavgb %%mm1, %%mm2 \n\t"
"movq (%3, %%eax), %%mm1 \n\t" "movq (%3, %%eax), %%mm1 \n\t"
"psadbw %%mm1, %%mm2 \n\t" "psadbw %%mm1, %%mm2 \n\t"