On Wed, 2014-09-10 at 14:29 -0500, Segher Boessenkool wrote:
> Huh, interesting. I assumed 1-(0_or_1) and (0_or_1)^1 would look the
> same to combine, but no.
>
> With subfic, combine optimises it all to a branch on cr0. With xori,
> for some reason combine has a much easier job, and it optimise
On Wed, Sep 10, 2014 at 01:38:13PM -0500, Peter Bergner wrote:
> On Tue, 2014-09-09 at 19:28 -0400, David Edelsohn wrote:
> > On Tue, Sep 9, 2014 at 3:29 PM, Segher Boessenkool
> > > 2014-09-09 Segher Boessenkool
> > >
> > > * config/rs6000/htm.md (tabort, tabortdc, tabortdci, tabortwc,
On Tue, 2014-09-09 at 19:28 -0400, David Edelsohn wrote:
> On Tue, Sep 9, 2014 at 3:29 PM, Segher Boessenkool
> > 2014-09-09 Segher Boessenkool
> >
> > * config/rs6000/htm.md (tabort, tabortdc, tabortdci, tabortwc,
> > tabortwci, tbegin, tcheck, tend, trechkpt, treclaim, tsr): Us
On Tue, Sep 9, 2014 at 3:29 PM, Segher Boessenkool
wrote:
> These patterns use subfic now. subfic clobbers the carry. Other code
> already preferably uses xor. Let's do the same here.
>
> Bootstrapped and tested as usual, no regressions. Is this okay to apply?
>
>
> Segher
>
>
> 2014-09-09 Se
These patterns use subfic now. subfic clobbers the carry. Other code
already preferably uses xor. Let's do the same here.
Bootstrapped and tested as usual, no regressions. Is this okay to apply?
Segher
2014-09-09 Segher Boessenkool
* config/rs6000/htm.md (tabort, tabortdc, tabo
