Hello Marc. On 04 Jul 21:11, Marc Glisse wrote: > On Thu, 3 Jul 2014, Kirill Yukhin wrote: > like combining 2 shuffles unless the result is the identity. And > expanding shuffles that can be done in a single instruction works > well. > > But I am happy not doing them yet. To be very specific, could you > list which intrinsics you would like to remove from the posted > patch? I am not a x86 maintainer, however while such a replacements produce correct semantics and probably enable optimizations, I support your patch.
Probably you could try such your approach on AVX2, AVX-512 whose intrinsics are well covered by tests? > >On the over hand, updated in such a way intrinsic > >may actually generate different instruction then intended (e.g. FMA case). > > It is the same with scalars, we have -ffp-contract for that. Agreed. -- Thanks, K
