4 ms·
> SIMD – can't use lookup tables This is doing exactly that with `vpermb` and `vpermi2b`.
by saati 7y ago
> SIMD – can't use lookup tables
This is doing exactly that with `vpermb` and `vpermi2b`.
- vardump 7y agoYeah, missed that you can now fit 64 8-bit entries in a single 512 bit register! Generally my point stands that LUTs are not vectorizable, except for small special cases like this.