[Bug libfortran/78379] Processor-specific versions for matmul

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78379

--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jerry DeLisle from comment #3)
> I did apply your second patch:
> 
> I do not get any improvement and results are diminished from current trunk,
> so I am missing something. This is same machine I used showing results in
> 51119. It does have avx.

You have AMD processor, can you try with -mprefer-avx128 option?