Mar 16, 2019, 4:33 PM by d...@lynne.ee <mailto:d...@lynne.ee>:
> 58893 decicycles in deemphasis_c, 130548 runs, 524 skips > 9475 decicycles in deemphasis_fma3, 130686 runs, 386 skips -> 6.21x > speedup > > 24866 decicycles in postfilter_c, 65386 runs, 150 skips > 5268 decicycles in postfilter_fma3, 65505 runs, 31 skips -> 4.72x > speedup > > Total decoder speedup: ~14% > > Deemphasis SIMD based on the following unrolling: > const float c1 = CELT_EMPH_COEFF, c2 = c1*c1, c3 = c2*c1, c4 = c3*c1; > float state = coeff; > > for (int i = 0; i < len; i += 4) { > y[0] = x[0] + c1*state; > y[1] = x[1] + c2*state + c1*x[0]; > y[2] = x[2] + c3*state + c1*x[1] + c2*x[0]; > y[3] = x[3] + c4*state + c1*x[2] + c2*x[1] + c3*x[0]; > > state = y[3]; > y += 4; > x += 4; > } > Ping to this part of the patchset while I fix android? _______________________________________________ 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".