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pix_sum16_mmx()

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Originally committed as revision 961 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-09-20 10:03:01 +00:00
parent 3f09f52adf
commit 084c726ba3
1 changed files with 39 additions and 0 deletions
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39
libavcodec/i386/dsputil_mmx.c
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@ -420,6 +420,44 @@ static void clear_blocks_mmx(DCTELEM *blocks)
);
}
static int pix_sum16_mmx(UINT8 * pix, int line_size){
const int h=16;
int sum;
int index= -line_size*h;
__asm __volatile(
"pxor %%mm7, %%mm7 \n\t"
"pxor %%mm6, %%mm6 \n\t"
"1: \n\t"
"movq (%2, %1), %%mm0 \n\t"
"movq (%2, %1), %%mm1 \n\t"
"movq 8(%2, %1), %%mm2 \n\t"
"movq 8(%2, %1), %%mm3 \n\t"
"punpcklbw %%mm7, %%mm0 \n\t"
"punpckhbw %%mm7, %%mm1 \n\t"
"punpcklbw %%mm7, %%mm2 \n\t"
"punpckhbw %%mm7, %%mm3 \n\t"
"paddw %%mm0, %%mm1 \n\t"
"paddw %%mm2, %%mm3 \n\t"
"paddw %%mm1, %%mm3 \n\t"
"paddw %%mm3, %%mm6 \n\t"
"addl %3, %1 \n\t"
" js 1b \n\t"
"movq %%mm6, %%mm5 \n\t"
"psrlq $32, %%mm6 \n\t"
"paddw %%mm5, %%mm6 \n\t"
"movq %%mm6, %%mm5 \n\t"
"psrlq $16, %%mm6 \n\t"
"paddw %%mm5, %%mm6 \n\t"
"movd %%mm6, %0 \n\t"
"andl $0xFFFF, %0 \n\t"
: "=&r" (sum), "+r" (index)
: "r" (pix - index), "r" (line_size)
);
return sum;
}
#if 0
static void just_return() { return; }
#endif
@ -448,6 +486,7 @@ void dsputil_init_mmx(void)
put_pixels_clamped = put_pixels_clamped_mmx;
add_pixels_clamped = add_pixels_clamped_mmx;
clear_blocks= clear_blocks_mmx;
pix_sum= pix_sum16_mmx;
pix_abs16x16 = pix_abs16x16_mmx;
pix_abs16x16_x2 = pix_abs16x16_x2_mmx;