[PATCH] Disable use of FMA instructions in branred

[Steven Munroe]

On Fri, 2012-03-16 at 11:25 -0400, Carlos O'Donell wrote:
> On Fri, Mar 16, 2012 at 11:14 AM, Andreas Schwab <schwab@linux-m68k.org> wrote:
> > __branred depends on precise double precision, and falls down completely
> > if the compiler is allowed to contract floating-point expressions (which
> > is does by default).
> >
> > Andreas.
> >
> > 2012-03-16  Andreas Schwab  <schwab@linux-m68k.org>
> >
> >        * configure.in (libc_cv_cc_nofma): Check for option to disable
> >        generation of FMA instructions.
> >        * configure: Regenerate.
> >        * config.make.in (config-cflags-nofma): Set from libc_cv_cc_nofma.
> >        * math/Makefile (CFLAGS-branred.c): Define.
> 
> Is this caught by the current testsuite?
> 
> If not, could we add a test for this regression?
> 
PowerPC has had FMA for a long time. Does the same failure exist on
PowerPc or is this Intel specific?