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Bug#748616: marked as done (gcc-4.8: [armel] float to double conversion does not silence sNaN)

Your message dated Mon, 18 Apr 2016 18:43:10 +0000
with message-id <[🔎] E1asE8c-0005cB-9r@franck.debian.org>
and subject line Bug#821336: Removed package(s) from unstable
has caused the Debian Bug report #748616,
regarding gcc-4.8: [armel] float to double conversion does not silence sNaN
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
748616: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=748616
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: gcc-4.8
Version: 4.8.2-21
Severity: normal

Consider the following code:

#define _GNU_SOURCE
#include <stdio.h>
#include <math.h>

int main (void)
{
  float sNaN = __builtin_nansf ("");
  double x = (double) sNaN;
  return issignaling(x);
}

It returns 1 on armel, but 0 on armel or other architectures. Quoting
the IEEE Std 754 standard:

"Under default exception handling, any operation signaling an invalid
operation exception and for which a floating-point result is to be
delivered shall deliver a quiet NaN."

Given the soft float ARM code ignores exceptions and always provides a
result, a float to double conversion of a signaling NaN should return a
quiet NaN.

-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: armel (armv5tel)

Kernel: Linux 3.2.0-4-kirkwood
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

--- End Message ---
--- Begin Message --- 
Version: 4.8.5-4+rm

Dear submitter,

as the package gcc-4.8 has just been removed from the Debian archive
unstable we hereby close the associated bug reports.  We are sorry
that we couldn't deal with your issue properly.

For details on the removal, please see https://bugs.debian.org/821336

The version of this package that was in Debian prior to this removal
can still be found using http://snapshot.debian.org/.

This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
ftpmaster@ftp-master.debian.org.

Debian distribution maintenance software
pp.
Scott Kitterman (the ftpmaster behind the curtain)

--- End Message ---
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