On 09/16/2011 08:22 AM, Jakub Jelinek wrote:
> * config/i386/sse.md (vec_extract_hi_,
> vec_extract_hi_v16hi, vec_extract_hi_v32qi): Use
> vextracti128 instead of vextractf128 for -mavx2 and
> integer vectors. For V4DFmode fix up mode attribute.
> (VEC_EXTRACT_MODE):
On Fri, Sep 16, 2011 at 11:16:44AM +0200, Jakub Jelinek wrote:
> The avx2_extracti128 pattern looked like wrong RTL, as to extract
> a 2 element vector from 4 element vector it used just one constant
> in the parallel instead of two. I've changed it into a define_expand.
Actually there were two f
Hi!
I've noticed vector extraction generates terrible code
with -mavx{,2} when extracting something from 32-byte vectors.
Everything is forced into memory, then loaded back.
For extraction of first lane I believe we can just use
standard 128-bit extraction from the %xmmN register corresponding
to
