aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/ieee754/ldbl-96
diff options
context:
space:
mode:
authorJoseph Myers <joseph@codesourcery.com>2015-06-18 23:27:41 +0000
committerJoseph Myers <joseph@codesourcery.com>2015-06-18 23:27:41 +0000
commit8db3cdefefe39e9d42b05b1610a63190e9f7fba4 (patch)
treeb4ae0196406ac58ad51d28aacc95b074341c179c /sysdeps/ieee754/ldbl-96
parenta7a3c24632904b5b1d7e47eaf6b955bba6246b8f (diff)
downloadglibc-8db3cdefefe39e9d42b05b1610a63190e9f7fba4.tar
glibc-8db3cdefefe39e9d42b05b1610a63190e9f7fba4.tar.gz
glibc-8db3cdefefe39e9d42b05b1610a63190e9f7fba4.tar.bz2
glibc-8db3cdefefe39e9d42b05b1610a63190e9f7fba4.zip
Fix asinh missing underflows (bug 16350).
Similar to various other bugs in this area, some asinh implementations do not raise the underflow exception for subnormal arguments, when the result is tiny and inexact. This patch forces the exception in a similar way to previous fixes. Tested for x86_64, x86 and mips64. [BZ #16350] * sysdeps/i386/fpu/s_asinh.S (__asinh): Force underflow exception for arguments with small absolute value. * sysdeps/i386/fpu/s_asinhf.S (__asinhf): Likewise. * sysdeps/i386/fpu/s_asinhl.S (__asinhl): Likewise. * sysdeps/ieee754/dbl-64/s_asinh.c: Include <float.h>. (__asinh): Force underflow exception for arguments with small absolute value. * sysdeps/ieee754/flt-32/s_asinhf.c: Include <float.h>. (__asinhf): Force underflow exception for arguments with small absolute value. * sysdeps/ieee754/ldbl-128/s_asinhl.c: Include <float.h>. (__asinhl): Force underflow exception for arguments with small absolute value. * sysdeps/ieee754/ldbl-128ibm/s_asinhl.c: Include <float.h>. (__asinhl): Force underflow exception for arguments with small absolute value. * sysdeps/ieee754/ldbl-96/s_asinhl.c: Include <float.h>. (__asinhl): Force underflow exception for arguments with small absolute value. * math/auto-libm-test-in: Do not mark underflow exceptions as possibly missing for bug 16350. * math/auto-libm-test-out: Regenerated.
Diffstat (limited to 'sysdeps/ieee754/ldbl-96')
-rw-r--r--sysdeps/ieee754/ldbl-96/s_asinhl.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-96/s_asinhl.c b/sysdeps/ieee754/ldbl-96/s_asinhl.c
index 5e679bd719..75e47c71ea 100644
--- a/sysdeps/ieee754/ldbl-96/s_asinhl.c
+++ b/sysdeps/ieee754/ldbl-96/s_asinhl.c
@@ -29,6 +29,7 @@ static char rcsid[] = "$NetBSD: $";
* := signl(x)*log1pl(|x| + x^2/(1 + sqrtl(1+x^2)))
*/
+#include <float.h>
#include <math.h>
#include <math_private.h>
@@ -44,6 +45,11 @@ long double __asinhl(long double x)
GET_LDOUBLE_EXP(hx,x);
ix = hx&0x7fff;
if(__builtin_expect(ix< 0x3fde, 0)) { /* |x|<2**-34 */
+ if (fabsl (x) < LDBL_MIN)
+ {
+ long double force_underflow = x * x;
+ math_force_eval (force_underflow);
+ }
if(huge+x>one) return x; /* return x inexact except 0 */
}
if(__builtin_expect(ix>0x4020,0)) { /* |x| > 2**34 */