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Re: [PATCH] libgfortran/24313 wrong branch cut for csqrt()

From: Steve Kargl <sgk at troutmask dot apl dot washington dot edu>
To: Andrew Pinski <pinskia at physics dot uc dot edu>
Cc: fortran at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org
Date: Tue, 11 Oct 2005 13:51:43 -0700
Subject: Re: [PATCH] libgfortran/24313 wrong branch cut for csqrt()
References: <20051011204254.GB9602@troutmask.apl.washington.edu> <898835dbcfa6f79c485d9cf9ee03ec4e@physics.uc.edu>

On Tue, Oct 11, 2005 at 04:46:42PM -0400, Andrew Pinski wrote:
> 
> On Oct 11, 2005, at 4:42 PM, Steve Kargl wrote:
> 
> >The attached patch fixes a problem with chosing the
> >proper branch cut for csqrt((0,-1)).  This problem
> >is also in glibc in that libgfortran imported glibc's
> >csqrt{f}, which is used on OS's without these functions
> >in libm.
> >
> >Bubblestrap and regresion tested on amd64-*-freebsd.
> 
> You should most likely xfail this on *-*-linux-gnu so
> people don't get confused by it failing on GNU/Linux.
> And put a comment saying what the glibc bug number is.
> 

I don't know the glibc bug number nor do I know where
to find it.  I'll add the xfail to the test case, but
I think that it is papering over a problem that people
should know and be concerned about.

-- 
Steve

Follow-Ups:
- Re: [PATCH] libgfortran/24313 wrong branch cut for csqrt()
  - From: Andrew Pinski

References:
- [PATCH] libgfortran/24313 wrong branch cut for csqrt()
  - From: Steve Kargl
- Re: [PATCH] libgfortran/24313 wrong branch cut for csqrt()
  - From: Andrew Pinski

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