On Mon, Nov 7, 2011 at 10:20 PM, Jakub Jelinek <ja...@redhat.com> wrote:
> I think it is at least more readable and perhaps for some CPUs could > be faster (for SandyBridge it is the same speed) if we emit a more > specialized insn over a more generic one. > > Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk? > > In the attachment is my first attempt to do this, in the expander, > unfortunately that turned out to be pessimizing - seems like IRA or > reload has issues with the subregs and on No, it is by design. Please see the comment in ix86_cannot_change_mode_class, why we prohibit all nonparadoxical subregs changing size for SSE/MMX classes. > 2011-11-07 Jakub Jelinek <ja...@redhat.com> > > * config/i386/sse.md (*avx_vperm2f128<mode>3_nozero): Emit mask > 0x12 and 0x20 as vinsert[fi]128 instead of vperm2[fi]128. OK. Thanks, Uros.
