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[BZ #16427] Fix ldbl-128 exp overflows.

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Invoke the non-IEEE handling only for numbers special also in the IEEE
case.  This aligns the exp handling with the other ldbl variants.
This commit is contained in:
Andreas Krebbel 2014-01-15 09:50:31 +01:00
parent c20d5bf509
commit 7beb48cbb7
2 changed files with 11 additions and 13 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2014-01-15 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
[BZ #16427]
* sysdeps/ieee754/ldbl-128/w_expl.c (__expl): Invoke the non-IEEE
handling only for numbers special also in the IEEE case.
2014-01-15 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
* sysdeps/s390/fpu/libm-test-ulps: Regenerate.

18
sysdeps/ieee754/ldbl-128/w_expl.c
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@ -25,24 +25,16 @@ static char rcsid[] = "$NetBSD: $";
#include <math.h>
#include <math_private.h>
static const long double
o_threshold= 1.1356523406294143949491931077970763428449E4L,
u_threshold= -1.1433462743336297878837243843452621503410E4;
long double __expl(long double x) /* wrapper exp */
{
#ifdef _IEEE_LIBM
return __ieee754_expl(x);
#else
long double z;
z = __ieee754_expl(x);
if(_LIB_VERSION == _IEEE_) return z;
if(__finitel(x)) {
if(x>o_threshold)
return __kernel_standard_l(x,x,206); /* exp overflow */
else if(x<u_threshold)
return __kernel_standard_l(x,x,207); /* exp underflow */
}
long double z = __ieee754_expl (x);
if (__glibc_unlikely (!__finitel (z) || z == 0)
&& __finitel (x) && _LIB_VERSION != _IEEE_)
return __kernel_standard_l (x, x, 206 + !!__signbitl (x));
return z;
#endif
}