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| author | Andreas Krebbel <krebbel@linux.vnet.ibm.com> | 2014-01-15 09:50:31 +0100 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@linux.vnet.ibm.com> | 2014-01-15 09:50:31 +0100 |
| commit | 7beb48cbb77ef32135a07b429838521a0c181377 (patch) | |
| tree | e545e9c4f79024dee0da455c0cbf25d33c1d135d /sysdeps/ieee754 | |
| parent | c20d5bf50991d6c4e396f27612ad379214120c48 (diff) | |
| download | glibc-7beb48cbb77ef32135a07b429838521a0c181377.tar.gz glibc-7beb48cbb77ef32135a07b429838521a0c181377.tar.xz glibc-7beb48cbb77ef32135a07b429838521a0c181377.zip | |
[BZ #16427] Fix ldbl-128 exp overflows.
Invoke the non-IEEE handling only for numbers special also in the IEEE case. This aligns the exp handling with the other ldbl variants.
Diffstat (limited to 'sysdeps/ieee754')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/w_expl.c | 18 |
1 files changed, 5 insertions, 13 deletions
diff --git a/sysdeps/ieee754/ldbl-128/w_expl.c b/sysdeps/ieee754/ldbl-128/w_expl.c index 10193befa9..f0b1f8e55f 100644 --- a/sysdeps/ieee754/ldbl-128/w_expl.c +++ b/sysdeps/ieee754/ldbl-128/w_expl.c @@ -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 } |