This is the mail archive of the gcc@gcc.gnu.org mailing list for the GCC project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: -mno-fancy-math-387 doesn't work with -mpentium3 in gcc 3.1

From: "H. J. Lu" <hjl at lucon dot org>
To: Jan Hubicka <jh at suse dot cz>
Cc: gcc at gcc dot gnu dot org
Date: Mon, 22 Jul 2002 07:35:53 -0700
Subject: Re: -mno-fancy-math-387 doesn't work with -mpentium3 in gcc 3.1
References: <20020721230615.A15646@lucon.org> <20020722101742.GA2426@atrey.karlin.mff.cuni.cz>

On Mon, Jul 22, 2002 at 12:17:42PM +0200, Jan Hubicka wrote:
> > # ../xgcc -B../  ~/work/gnu/import/gcc-3.1/gcc/testsuite/gcc.dg/i386-387-1.c -ffast-math -mfpmath=387 -mno-fancy-math-387 -S -O -mcpu=i386 -march=pentium3
> > # cat i386-387-1.s
> 
> You need -ffast-math in addition to fancy math as fsin is not 100%
> compatible with C standard notion of sin (it does not work for out of
> range values)
> 

I don't understand what you were saying. Please take a look at my
command line. -march=pentium3 generates fsin instead of a functin
call.


H.J.

References:
- -mno-fancy-math-387 doesn't work with -mpentium3 in gcc 3.1
  - From: H. J. Lu
- Re: -mno-fancy-math-387 doesn't work with -mpentium3 in gcc 3.1
  - From: Jan Hubicka

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]