On Fri, Feb 17, 2023 at 8:59 AM Ajit Agarwal via Gcc-patches <gcc-patches@gcc.gnu.org> wrote: > > > Hello All: > > This patch replaces fmr instruction (6 cycles) with xxlor instruction ( 2 > cycles) > Bootstrapped and regtested on powerpc64-linux-gnu.
I don't think this can be unconditionally replaced. xxlor only exists in newer Power ISA. Thanks, Andrew Pinski > > copyright assignment form is still in the process of being sent. > > Thanks & Regards > Ajit > > rs6000: fmr gets used instead of faster xxlor [PR93571] > > This patch replaces 6 cycles fmr instruction with xxlor > 2 cycles. > > 2023-02-17 Ajit Kumar Agarwal <aagar...@linux.ibm.com> > > gcc/ChangeLog: > > * config/rs6000/rs6000.md (*movdf_hardfloat64): Replace fmr with > xxlor instruction. > --- > gcc/config/rs6000/rs6000.md | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md > index 4a7812fa592..dfd6c73ffcb 100644 > --- a/gcc/config/rs6000/rs6000.md > +++ b/gcc/config/rs6000/rs6000.md > @@ -8436,7 +8436,7 @@ > "@ > stfd%U0%X0 %1,%0 > lfd%U1%X1 %0,%1 > - fmr %0,%1 > + xxlor %0,%1,%1 > lxsd %0,%1 > stxsd %1,%0 > lxsdx %x0,%y1 > -- > 2.31.1 > >
