On Fri, Sep 2, 2022 at 7:55 AM Lynne <d...@lynne.ee> wrote: > + movd xmm4, strided > + neg t2d > + movd xmm5, t2d > + SPLATD xmm4 > + SPLATD xmm5 > + vperm2f128 m4, m4, m4, 0x00 ; +stride splatted > + vperm2f128 m5, m5, m5, 0x00 ; -stride splatted
movd xm4, strided pxor m5, m5 vpbroadcastd m4, xm4 + mova m2, [lutq] ; load LUT indices + pcmpeqd m0, m0 ; zero out a register + pmulld m3, m2, m4 ; multiply by +stride + pmulld m2, m5 ; multiply by -stride + movaps m1, m0 + vgatherdps m6, [inq + 2*m3], m0 ; im + vgatherdps m7, [t1q + 2*m2], m1 ; re pmulld m2, m4, [lutq] pcmpeqd m0, m0 mova m1, m0 vgatherdps m6, [inq + 2*m2], m0 psubd m2, m5, m2 vgatherdps m7, [t1q + 2*m2], m1 The comment for pcmpeqd is also wrong as bits are set to 1, not 0. That instruction could also be moved outside the loop and replaced with a cheaper register-register move inside the loop. > + vperm2f128 m0, m0, 0x01 ; flip > + vperm2f128 m4, m4, 0x01 ; flip (2) > + shufpd m0, m0, 101b > + shufpd m4, m4, 101b vpermpd m0, m0, q0123 vpermpd m4, m4, q0123 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
