On Wed, Mar 20, 2013 at 4:29 PM, Marc Glisse <marc.gli...@inria.fr> wrote: > On Wed, 20 Mar 2013, Richard Henderson wrote: > >> On 03/20/2013 08:00 AM, Marc Glisse wrote: >>> >>> Do you at least agree that vector-vector subregs make sense, or is that >>> part >>> wrong as well? >> >> >> You mean a V4SImode subreg of a V8SImode register, not just same-size >> casting? > > > I am mostly interested in the reverse, a paradoxical subreg, since > vec_select can only model one direction (and only rvalues, but that's a > different question).
vec_duplicate? Honestly, what semantics should _mm256_castpd128_pd256 have if it is supposed to cast a v2df to a v4df? Or what use? Richard.
