On 7/16/2025 1:24 PM, Niklas Haas wrote:
+cglobal detect_alpha%1_%3, 6, 7, 6, color, color_stride, alpha, alpha_stride, width, height, x + pxor m0, m0 + add colorq, widthq + add alphaq, widthq + neg widthq +%ifidn %3, limited +%if ARCH_X86_64 + movq xm3, r6mp ; p + movq xm4, r7mp ; q + movq xm5, r8mp ; k
They are int arguments, so no point using movq.
+%else + movd xm3, r6mp ; p + movd xm4, r7mp ; q + movd xm5, r8mp ; k +%endif + vpbroadcast%2 m3, xm3 + vpbroadcast%2 m4, xm4 + vpbroadcast%2 m5, xm5 +%endif +.lineloop: + mov xq, widthq + .loop: + %ifidn %3, full + movu m1, [colorq + xq] + movu m2, [alphaq + xq] + pmaxu%1 m1, m2 + %else + pmovzx%1%2 m1, [colorq + xq] + pmovzx%1%2 m2, [alphaq + xq] + pmull%2 m1, m3 + pmull%2 m2, m4
pmulld is painfully slow, so try to instead use pmaddwd. It should be doable because the input are words.
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