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From: "jakub at redhat dot com" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug math/3919] Quiet NaNs not propagated quietly by some math functions
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------- Additional Comments From jakub at redhat dot com  2007-03-15 13:49 -------
acosh{,f,l} certainly don't raise that:
#define _GNU_SOURCE
#include <math.h>
#include <fenv.h>
#include <stdio.h>

volatile double n = NAN;
volatile double d;
volatile float f;
volatile long double ld;
volatile int i;

int
main (void)
{
  feclearexcept (FE_ALL_EXCEPT);
  d = acosh (n);
  f = acoshf (n);
  ld = acoshl (n);
  printf ("%x\n", fetestexcept (FE_INVALID));
  i = ilogb (n);
  i = ilogbf (n);
  i = ilogbl (n);
  printf ("%x\n", fetestexcept (FE_INVALID));
  d = log (n);
  f = logf (n);
  ld = logl (n);
  printf ("%x\n", fetestexcept (FE_INVALID));
  return 0;
}

prints 0, 1, 1 with both -m32 -fno-builtin and -m64 -fno-builtin on x86_64
with current CVS glibc.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |WAITING


http://sourceware.org/bugzilla/show_bug.cgi?id=3919

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