[volta83]

Can you change the "shape of the vectors? e.g. 1x16 vs 4x4 to support vectors and matrices?

[crest]

You have widening operations e.g. 16x16->32 bit multiplications and can reduce number of available registers to get longer vectors, but among the really interesting ones are fault only first load and masked instructions that enable the vector unit to work on things like null terminated strings. The specification includes vectorized strlen/strcmp/strcpy/strncpy implementations as examples. Most existing (packed) SIMD instruction sets aren't useful for these common functions.

[jcranmer]

Given the number of implementations of str* routines in https://github.com/bminor/glibc/tree/master/sysdeps/x86_64/m..., maybe you might want to revisit your last statement. PCMP/MOVMSK work well enough for finding the trailing NUL.