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e84136ba03
Only remaining MMX implementation is the ARGB/BGRA/AYUV blending for which we first need the orc compositing opcodes.
124 lines
5.7 KiB
C
124 lines
5.7 KiB
C
#ifdef A32
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static inline void
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NAME_BLEND (guint8 * dest, const guint8 * src, gint src_height, gint src_width,
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gint src_stride, gint dest_stride, guint s_alpha)
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{
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gint i;
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gint src_add = src_stride - (4 * src_width);
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gint dest_add = dest_stride - (4 * src_width);
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for (i = 0; i < src_height; i++) {
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/* (P1 * (256 - A) + (P2 * A)) / 256
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* => (P1 * 256 - P1 * A + P2 * A) / 256
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* => (P1 * 256 + A * (P2 - P1) / 256
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* => P1 + (A * (P2 - P1)) / 256
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*/
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/* *INDENT-OFF* */
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__asm__ __volatile__ (
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" pcmpeqd %%mm5 , %%mm5 \n\t" /* mm5 = 0xffff... */
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#if A_OFF == 0
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" psrld $24 , %%mm5 \n\t" /* mm5 = 00 00 00 ff 00 00 00 ff, selector for alpha */
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#else
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" pslld $24 , %%mm5 \n\t" /* mm5 = ff 00 00 00 ff 00 00 00, selector for alpha */
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#endif
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" mov %4 , %%eax \n\t" /* eax = s_alpha */
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" movd %%eax , %%mm6 \n\t" /* mm6 = s_alpha */
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" punpckldq %%mm6 , %%mm6 \n\t" /* mm6 = 00 00 00 aa 00 00 00 aa, alpha scale factor */
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" movl %5 , %%ecx \n\t" /* ecx = src_width */
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" test $1 , %%ecx \n\t" /* check odd pixel */
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" je 1f \n\t"
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/* do odd pixel */
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" movd (%2) , %%mm2 \n\t" /* mm2 = src, 00 00 00 00 sv su sy sa */
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" movd (%3) , %%mm1 \n\t" /* mm1 = dest, 00 00 00 00 dv du dy da */
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" movq %%mm2 , %%mm0 \n\t"
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" punpcklbw %%mm7 , %%mm2 \n\t" /* mm2 = 00 sv 00 su 00 sy 00 sa */
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" pand %%mm5 , %%mm0 \n\t" /* mm0 = 00 00 00 00 00 00 00 sa, get alpha component */
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#if A_OFF != 0
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" psrld $24 , %%mm0 \n\t"
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#endif
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" punpcklbw %%mm7 , %%mm1 \n\t" /* mm1 = 00 dv 00 du 00 dy 00 da */
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" pmullw %%mm6 , %%mm0 \n\t" /* mult with scale */
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" psubw %%mm1 , %%mm2 \n\t" /* mm2 = mm2 - mm1 */
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" punpcklwd %%mm0 , %%mm0 \n\t"
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" punpckldq %%mm0 , %%mm0 \n\t" /* mm0 == 00 aa 00 aa 00 aa 00 aa */
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" psrlw $8 , %%mm0 \n\t"
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" pmullw %%mm0 , %%mm2 \n\t" /* mm2 == a * mm2 */
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" psllw $8 , %%mm1 \n\t" /* scale up */
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" paddw %%mm1 , %%mm2 \n\t" /* mm2 == mm2 + mm1 */
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" psrlw $8 , %%mm2 \n\t" /* scale down */
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" por %%mm5 , %%mm2 \n\t" /* set alpha to ff */
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" packuswb %%mm2 , %%mm2 \n\t"
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" movd %%mm2 , (%3) \n\t" /* dest = mm1 */
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" add $4 , %1 \n\t"
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" add $4 , %0 \n\t"
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"1: \n\t"
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" sar $1 , %%ecx \n\t" /* prepare for 2 pixel per loop */
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" cmp $0 , %%ecx \n\t"
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" je 3f \n\t"
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"2: \n\t"
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/* do even pixels */
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" movq (%2) , %%mm2 \n\t" /* mm2 = src, sv1 su1 sy1 sa1 sv0 su0 sy0 sa0 */
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" movq (%3) , %%mm1 \n\t" /* mm1 = dest, dv1 du1 dy1 da1 dv0 du0 dy0 da0 */
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" movq %%mm2 , %%mm4 \n\t"
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" movq %%mm1 , %%mm3 \n\t"
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" movq %%mm2 , %%mm0 \n\t" /* copy for doing the alpha */
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" pxor %%mm7 , %%mm7 \n\t"
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" punpcklbw %%mm7 , %%mm2 \n\t" /* mm2 = 00 sv0 00 su0 00 sy0 00 sa0 */
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" punpckhbw %%mm7 , %%mm4 \n\t" /* mm4 = 00 sv1 00 su1 00 sy1 00 sa1 */
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" punpcklbw %%mm7 , %%mm1 \n\t" /* mm1 = 00 dv0 00 du0 00 dy0 00 da0 */
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" punpckhbw %%mm7 , %%mm3 \n\t" /* mm2 = 00 dv1 00 du1 00 dy1 00 da1 */
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" pand %%mm5 , %%mm0 \n\t" /* mm0 = 00 00 00 sa1 00 00 00 sa0 */
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#if A_OFF != 0
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" psrld $24 , %%mm0 \n\t"
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#endif
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" psubw %%mm1 , %%mm2 \n\t" /* mm2 = mm2 - mm1 */
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" pmullw %%mm6 , %%mm0 \n\t" /* mult with scale */
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" psubw %%mm3 , %%mm4 \n\t" /* mm4 = mm4 - mm3 */
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" psrlw $8 , %%mm0 \n\t" /* scale back */
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" movq %%mm0 , %%mm7 \n\t" /* save copy */
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" punpcklwd %%mm0 , %%mm0 \n\t" /* mm0 = 00 00 00 00 00 aa0 00 aa0 */
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" punpckhwd %%mm7 , %%mm7 \n\t" /* mm7 = 00 00 00 00 00 aa1 00 aa1 */
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" punpckldq %%mm0 , %%mm0 \n\t" /* mm0 = 00 aa0 00 aa0 00 aa0 00 aa0 */
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" punpckldq %%mm7 , %%mm7 \n\t" /* mm7 = 00 aa1 00 aa1 00 aa1 00 aa1 */
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" pmullw %%mm0 , %%mm2 \n\t" /* mm2 == aa * mm2 */
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" pmullw %%mm7 , %%mm4 \n\t" /* mm2 == aa * mm2 */
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" psllw $8 , %%mm1 \n\t"
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" psllw $8 , %%mm3 \n\t"
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" paddw %%mm1 , %%mm2 \n\t" /* mm2 == mm2 + mm1 */
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" paddw %%mm3 , %%mm4 \n\t" /* mm2 == mm2 + mm1 */
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" psrlw $8 , %%mm2 \n\t"
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" psrlw $8 , %%mm4 \n\t"
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" packuswb %%mm4 , %%mm2 \n\t"
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" por %%mm5 , %%mm2 \n\t" /* set alpha to ff */
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" movq %%mm2 , (%3) \n\t"
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" add $8 , %1 \n\t"
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" add $8 , %0 \n\t"
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" dec %%ecx \n\t"
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" jne 2b \n\t"
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"3: \n\t"
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:"=r" (src), "=r" (dest)
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:"0" (src), "1" (dest), "m" (s_alpha), "m" (src_width)
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:"%eax", "%ecx", "memory",
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"st", "st(1)", "st(2)", "st(3)", "st(4)", "st(5)", "st(6)", "st(7)"
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#ifdef __MMX__
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, "mm0", "mm1", "mm2", "mm4", "mm3", "mm5", "mm6", "mm7"
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#endif
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);
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/* *INDENT-ON* */
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src += src_add;
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dest += dest_add;
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}
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__asm__ __volatile__ ("emms");
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}
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#endif
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