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Re: csin implementation discrepancy vs glibc

From: "Kaveh R. GHAZI" <ghazi at caip dot rutgers dot edu>
To: Richard Guenther <richard dot guenther at gmail dot com>
Cc: fortran at gcc dot gnu dot org
Date: Sat, 20 Jan 2007 10:19:25 -0500 (EST)
Subject: Re: csin implementation discrepancy vs glibc
References: <Pine.GSO.4.58.0701190952200.23743@caipclassic.rutgers.edu> <84fc9c000701190720q779e7f8dh86025e21516b71a5@mail.gmail.com>

On Fri, 19 Jan 2007, Richard Guenther wrote:

> On 1/19/07, Kaveh R. GHAZI <ghazi@caip.rutgers.edu> wrote:
> > It occurred to me that the fortran list might be interested in a
> > discrepancy I found between fortran/simplify.c:gfc_simplify_sin and the
> > glibc implementation of csin.  See:
> > http://gcc.gnu.org/ml/gcc-patches/2007-01/msg01610.html
> >
> > Thoughts?
>
> The glibc variant is obviously broken as  ccos(PI) != cos(PI) for them.
> Richard.

I thought they only diverge when the real part is negative.

		--Kaveh
--
Kaveh R. Ghazi			ghazi@caip.rutgers.edu

References:
- csin implementation discrepancy vs glibc
  - From: Kaveh R. GHAZI
- Re: csin implementation discrepancy vs glibc
  - From: Richard Guenther

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