> For SIMD, I studied what's available last year for HarfBuzz. I
> documented what I found here:
>
> https://github.com/harfbuzz/harfbuzz/blob/simd/src/hb-simd.hh
Thanks for the link, it's an interesting read.
> If you use floats internally and fill in the distances, then you can
> do SIMD passes at the end to do sqrt, clamping, and other things to
> generate the output. But even solving computing roots or the
> Newton-Raphson can be done in SIMD for up to 8 samples at a time.
IMHO, in FreeType, SIMD support is something to be done in addition,
not as a replacement. Since Anuj makes quick progress I suggest that
he first concentrates on the fixed-float route. If there is some time
left we should check how to SIMD can be implemented.
Werner
