[PATCH] [ARC] Use hardware support for double-precision compare instructions.

[Claudiu Zissulescu Ianculescu]

It is already ported :)
https://github.com/gcc-mirror/gcc/commit/555e4a053951a0ae24835a266e71819336d7f637#diff-5b8bd26eec6c2b9f560870c205416edc

Cheers,
Claudiu

On Wed, Jan 15, 2020 at 1:49 AM Vineet Gupta <Vineet.Gupta1@synopsys.com> wrote:
>
> On 12/9/19 1:52 AM, Claudiu Zissulescu wrote:
> > Although the FDCMP (the double precision floating point compare instruction) is added to the compiler, it is not properly used via cstoredi pattern. Fix it.
> >
> > OK to apply?
> > Claudidu
> >
> > xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>
> >
> >       * config/arc/arc.md (iterator SDF): Check TARGET_FP_DP_BASE.
> >       (cstoredi4): Use TARGET_HARD_FLOAT.
> > ---
> >  gcc/config/arc/arc.md | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/gcc/config/arc/arc.md b/gcc/config/arc/arc.md
> > index b592f25afce..bd44030b409 100644
> > --- a/gcc/config/arc/arc.md
> > +++ b/gcc/config/arc/arc.md
> > @@ -3749,7 +3749,7 @@ archs4x, archs4xd"
> >  })
> >
> >  (define_mode_iterator SDF [(SF "TARGET_FP_SP_BASE || TARGET_OPTFPE")
> > -                        (DF "TARGET_OPTFPE")])
> > +                        (DF "TARGET_FP_DP_BASE || TARGET_OPTFPE")])
> >
> >  (define_expand "cstore<mode>4"
> >    [(set (reg:CC CC_REG)
> > @@ -3759,7 +3759,7 @@ archs4x, archs4xd"
> >       (match_operator:SI 1 "comparison_operator" [(reg CC_REG)
> >                                                   (const_int 0)]))]
> >
> > -  "TARGET_FP_SP_BASE || TARGET_OPTFPE"
> > +  "TARGET_HARD_FLOAT || TARGET_OPTFPE"
> >  {
> >    gcc_assert (XEXP (operands[1], 0) == operands[2]);
> >    gcc_assert (XEXP (operands[1], 1) == operands[3]);
>
> Can this be backported to gcc-9 please ?
> glibc testing uses gcc-9
>
> Thx,
> -Vineet