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videomixer: src/dest are input and output of the AYUV blending MMX assembler

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Sebastian Dröge 2009-12-16 06:59:01 +01:00
parent c26ccb9722
commit 9e45038d8d
1 changed files with 8 additions and 8 deletions
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16
gst/videomixer/blend_ayuv.c
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@ -290,12 +290,12 @@ gst_videomixer_blend_ayuv_ayuv_mmx (guint8 * src, gint xpos, gint ypos,
"psrlq $56 , %%mm5 \n\t" /* mm5 = 0x0...0ff */
"xor %%ecx , %%ecx \n\t" /* ecx = 0 */
"1: \n\t"
"movzxb (%0) , %%eax \n\t" /* eax == source alpha */
"imul %2 , %%eax \n\t" /* eax = source alpha * alpha */
"movzxb (%2) , %%eax \n\t" /* eax == source alpha */
"imul %4 , %%eax \n\t" /* eax = source alpha * alpha */
"sar $8 , %%eax \n\t" /* eax = (source alpha * alpha) / 256 */
"movd %%eax , %%mm0 \n\t" /* mm0 = apply alpha */
"movd (%0) , %%mm2 \n\t" /* mm2 = src */
"movd (%1) , %%mm1 \n\t" /* mm1 = dest */
"movd (%2) , %%mm2 \n\t" /* mm2 = src */
"movd (%3) , %%mm1 \n\t" /* mm1 = dest */
"punpcklwd %%mm0 , %%mm0 \n\t"
"punpckldq %%mm0 , %%mm0 \n\t" /* mm0 == 0a 0a 0a 0a */
"punpcklbw %%mm7 , %%mm1 \n\t" /* mm1 == dv du dy da */
@ -307,14 +307,14 @@ gst_videomixer_blend_ayuv_ayuv_mmx (guint8 * src, gint xpos, gint ypos,
"psrlw $8 , %%mm1 \n\t"
"packuswb %%mm7 , %%mm1 \n\t"
"por %%mm5 , %%mm1 \n\t" /* mm1 = 0x.....ff */
"movd %%mm1 , (%1) \n\t" /* dest = mm1 */
"movd %%mm1 , (%3) \n\t" /* dest = mm1 */
"add $4 , %1 \n\t"
"add $4 , %0 \n\t"
"add $1 , %%ecx \n\t"
"cmp %%ecx , %3 \n\t"
"cmp %%ecx , %5 \n\t"
"jne 1b"
: /* no output */
:"r" (src), "r" (dest), "r" (b_alpha), "r" (src_width)
:"=r" (src), "=r" (dest)
:"0" (src), "1" (dest), "r" (b_alpha), "r" (src_width)
:"%eax", "%ecx", "memory"
#ifdef __MMX__
, "mm0", "mm1", "mm2", "mm5", "mm6", "mm7"