On Mon, 29 Jun 2020, Richard Biener via Gcc-patches wrote:
At least without -frounding-math fegetround could be
constant folded to FE_TONEAREST for which we'd need the
actual value of FE_TONEAREST.
That will break existing code which, since -frounding-math doesn't work
for that, protects all
On Mon, 29 Jun 2020, Richard Biener via Gcc-patches wrote:
> I'm not sure if the actual choice of macro values for the fe* builtins
> need glueing logic or if we want them to be determined statically
> by the target configuration - see how we handle folding of
> fpclassify. At least without -frou
On Mon, Jun 29, 2020 at 11:45:41PM +0200, Marc Glisse wrote:
> On Mon, 29 Jun 2020, Segher Boessenkool wrote:
>
> >Another question. How do these builtins prevent other FP insns from
> >being moved (or optimised) "over" them?
>
> At the GIMPLE level they don't.
And not at RTL level, either.
>
On Mon, 29 Jun 2020, Segher Boessenkool wrote:
Another question. How do these builtins prevent other FP insns from
being moved (or optimised) "over" them?
At the GIMPLE level they don't. They prevent other function calls from
moving across, just because function calls where at least one is n
Hi!
On Mon, Jun 29, 2020 at 08:49:05AM +0200, Richard Biener via Gcc-patches wrote:
> On Fri, Jun 26, 2020 at 10:12 PM Raoni Fassina Firmino via Gcc-patches
> wrote:
> > This is an early draft I'm working on to add fegetround , feclearexcept
> > and feraiseexcept as builtins on rs6000. This is m
On Fri, Jun 26, 2020 at 10:12 PM Raoni Fassina Firmino via Gcc-patches
wrote:
>
> Hi all,
>
>
> This is an early draft I'm working on to add fegetround , feclearexcept
> and feraiseexcept as builtins on rs6000. This is my first patch so I
> welcome any and all feedback. Foremost I have some ques
Hi all,
This is an early draft I'm working on to add fegetround , feclearexcept
and feraiseexcept as builtins on rs6000. This is my first patch so I
welcome any and all feedback. Foremost I have some questions to ask as
I got stuck on some problems.
Q1) How to implement a target specific buil
