https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63678
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org,
| |kyukhin at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
What means properly? The underlying instruction (256-bit VPBLENDW) certainly
accepts only 8-bit mask, and e.g.
https://software.intel.com/sites/products/documentation/doclib/iss/2013/compiler/cpp-lin/GUID-5369B2B5-B1E1-4D96-85AB-2019982667B4.htm
says nothing what would the upper bits mean, it also says that the mask is
8-bit immediate. Perhaps icc just doesn't diagnose incorrect masks?
Or do you see that for 16-bit masks _mm256_blend_epi16 would actually emit more
than one insn (say separate blends with the low 8-bit mask, high 8-bit mask and
then blend together)?
