On Wed, Sep 18, 2019 at 3:27 AM Kito Cheng wrote:
> On Wed, Sep 18, 2019 at 6:25 PM Richard Biener wrote:
> > Since it is target specific and for non-primary/secondary targets
> > it's the RISC-V maintainers call whether to allow backporting this.
> > Generally wrong-code issues can be backported
Hi Richard:
Got it, thanks :)
On Wed, Sep 18, 2019 at 6:25 PM Richard Biener wrote:
>
> On Wed, 18 Sep 2019, Kito Cheng wrote:
>
> > Hi Jakub, Richard:
> >
> > This commit is fixing wrong code gen for RISC-V, does it OK to
> > backport to GCC 9 branch?
>
> Since it is target specific and for non
On Wed, 18 Sep 2019, Kito Cheng wrote:
> Hi Jakub, Richard:
>
> This commit is fixing wrong code gen for RISC-V, does it OK to
> backport to GCC 9 branch?
Since it is target specific and for non-primary/secondary targets
it's the RISC-V maintainers call whether to allow backporting this.
General
Hi Jakub, Richard:
This commit is fixing wrong code gen for RISC-V, does it OK to
backport to GCC 9 branch?
On Fri, Sep 6, 2019 at 4:34 AM Jim Wilson wrote:
>
> Shifting by more than the size of a SUBREG_REG doesn't work, so we either
> need to disable splits if an input is paradoxical, or else
Hi Jim,
On Thu, Sep 05, 2019 at 04:40:56PM -0700, Jim Wilson wrote:
> On Thu, Sep 5, 2019 at 3:03 PM Segher Boessenkool
> wrote:
> > My big question is why do other targets not have this problem? Or what
> > is it they do differently?
>
> RISC-V doesn't have convenient sign/zero extend instruct
On Thu, Sep 5, 2019 at 3:03 PM Segher Boessenkool
wrote:
> My big question is why do other targets not have this problem? Or what
> is it they do differently?
RISC-V doesn't have convenient sign/zero extend instructions. We also
have a 12-bit immediate, whereas most other RISCs have a 16-bit
im
Hi Jim,
On Thu, Sep 05, 2019 at 01:34:09PM -0700, Jim Wilson wrote:
> Shifting by more than the size of a SUBREG_REG doesn't work, so we either
> need to disable splits if an input is paradoxical, or else we need to
> generate a clean temporary for intermediate results.
My big question is why do
Shifting by more than the size of a SUBREG_REG doesn't work, so we either
need to disable splits if an input is paradoxical, or else we need to
generate a clean temporary for intermediate results.
This was tested with rv32i/newlib and rv64gc/linux cross builds and checks.
There were no regressions
