static void gradfun_filter_line_mmxext(uint8_t *dst, uint8_t *src, uint16_t *dc, int width, int thresh, const uint16_t *dithers) { intptr_t x; if (width & 3) { x = width & ~3; ff_gradfun_filter_line_c(dst + x, src + x, dc + x / 2, width - x, thresh, dithers); width = x; } x = -width; __asm__ volatile( "movd %4, %%mm5 \n" "pxor %%mm7, %%mm7 \n" "pshufw $0, %%mm5, %%mm5 \n" "movq %6, %%mm6 \n" "movq %5, %%mm4 \n" "1: \n" "movd (%2,%0), %%mm0 \n" "movd (%3,%0), %%mm1 \n" "punpcklbw %%mm7, %%mm0 \n" "punpcklwd %%mm1, %%mm1 \n" "psllw $7, %%mm0 \n" "pxor %%mm2, %%mm2 \n" "psubw %%mm0, %%mm1 \n" // delta = dc - pix "psubw %%mm1, %%mm2 \n" "pmaxsw %%mm1, %%mm2 \n" "pmulhuw %%mm5, %%mm2 \n" // m = abs(delta) * thresh >> 16 "psubw %%mm6, %%mm2 \n" "pminsw %%mm7, %%mm2 \n" // m = -max(0, 127-m) "pmullw %%mm2, %%mm2 \n" "paddw %%mm4, %%mm0 \n" // pix += dither "pmulhw %%mm2, %%mm1 \n" "psllw $2, %%mm1 \n" // m = m*m*delta >> 14 "paddw %%mm1, %%mm0 \n" // pix += m "psraw $7, %%mm0 \n" "packuswb %%mm0, %%mm0 \n" "movd %%mm0, (%1,%0) \n" // dst = clip(pix>>7) "add $4, %0 \n" "jl 1b \n" "emms \n" :"+r"(x) :"r"(dst+width), "r"(src+width), "r"(dc+width/2), "rm"(thresh), "m"(*dithers), "m"(*pw_7f) :"memory" ); }
static void gradfun_filter_line_mmxext(uint8_t *dst, uint8_t *src, uint16_t *dc, int width, int thresh, const uint16_t *dithers) { intptr_t x; if (width & 3) { x = width & ~3; ff_gradfun_filter_line_c(dst + x, src + x, dc + x / 2, width - x, thresh, dithers); width = x; } x = -width; __asm__ volatile( "movd %4, %%mm5 \n" "pxor %%mm7, %%mm7 \n" "pshufw $0, %%mm5, %%mm5 \n" "movq %6, %%mm6 \n" "movq %5, %%mm4 \n" "1: \n" "movd (%2,%0), %%mm0 \n" "movd (%3,%0), %%mm1 \n" "punpcklbw %%mm7, %%mm0 \n" "punpcklwd %%mm1, %%mm1 \n" "psllw $7, %%mm0 \n" "pxor %%mm2, %%mm2 \n" "psubw %%mm0, %%mm1 \n"  