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Re: [attention machine maintainers] [PATCH] <math.h> issignaling

From: Thomas Schwinge <thomas at codesourcery dot com>
To: Adhemerval Zanella <azanella at linux dot vnet dot ibm dot com>
Cc: <libc-alpha at sourceware dot org>
Date: Thu, 28 Mar 2013 11:52:21 +0100
Subject: Re: [attention machine maintainers] [PATCH] <math.h> issignaling
References: <8762148l9v dot fsf at schwinge dot name> <87r4j73cqo dot fsf at schwinge dot name> <Pine dot LNX dot 4 dot 64 dot 1303261719310 dot 8202 at digraph dot polyomino dot org dot uk> <5151E427 dot 1080106 at linux dot vnet dot ibm dot com>

Hi!

On Tue, 26 Mar 2013 15:08:39 -0300, Adhemerval Zanella <azanella@linux.vnet.ibm.com> wrote:
> On 26-03-2013 14:33, Joseph S. Myers wrote:
> > On Fri, 22 Mar 2013, Thomas Schwinge wrote:
> >
> >> PowerPC -m64:
> >>
> >> math/basic-test.out:
> >>     Failure:  double x = (double) (long double) sNaN, !issignaling
> >>
> >> That is, this type cast -- which is a IEEE 754-2008 general-computational
> >> convertFormat operation (IEEE 754-2008, 5.4.2) -- does not turn the sNaN
> >> into a qNaN (whilst raising an INVALID exception; not checked here),
> >> which is contrary to IEEE 754-2008 5.1 and 7.2.  This I consider a
> >> compiler issue (powerpc-linux-gnu-gcc (Sourcery CodeBench 2012.09-92)
> >> 4.7.2).
> > Such a bug (assuming present in GCC trunk for 4.9) should be filed in GCC 
> > Bugzilla (and I suppose a new math-tests.h macro used to disable the test 
> > in question for older compilers).  Though I guess it might only be desired 
> > to change this for -fsignaling-nans.
> 
> It does for GCC trunk 4.9 on both PowerPC -m32 and -m64.

ÂIt doesÂ pass/fail/something else?  :-)

And ÂitÂ just being that one type casting test of math/basic-test, or
also any other issignaling (or related) tests?


GrÃÃe,
 Thomas

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Follow-Ups:
- Re: [attention machine maintainers] [PATCH] <math.h> issignaling
  - From: Adhemerval Zanella

References:
- [PATCH RFC] <math.h> issignaling
  - From: Thomas Schwinge
- [attention machine maintainers] [PATCH] <math.h> issignaling
  - From: Thomas Schwinge
- Re: [attention machine maintainers] [PATCH] <math.h> issignaling
  - From: Joseph S. Myers
- Re: [attention machine maintainers] [PATCH] <math.h> issignaling
  - From: Adhemerval Zanella

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