diff options
Diffstat (limited to 'sysdeps/ieee754/dbl-64/e_sinh.c')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/e_sinh.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/sysdeps/ieee754/dbl-64/e_sinh.c b/sysdeps/ieee754/dbl-64/e_sinh.c index 4ff28bf85d..c99d28311d 100644 --- a/sysdeps/ieee754/dbl-64/e_sinh.c +++ b/sysdeps/ieee754/dbl-64/e_sinh.c @@ -32,6 +32,7 @@ static char rcsid[] = "$NetBSD: e_sinh.c,v 1.7 1995/05/10 20:46:13 jtc Exp $"; * only sinh(0)=0 is exact for finite x. */ +#include <float.h> #include <math.h> #include <math_private.h> @@ -58,10 +59,16 @@ __ieee754_sinh (double x) /* |x| in [0,22], return sign(x)*0.5*(E+E/(E+1))) */ if (ix < 0x40360000) /* |x|<22 */ { - if (__glibc_unlikely (ix < 0x3e300000)) /* |x|<2**-28 */ + if (__glibc_unlikely (ix < 0x3e300000)) { /* |x|<2**-28 */ + if (fabs (x) < DBL_MIN) + { + double force_underflow = x * x; + math_force_eval (force_underflow); + } if (shuge + x > one) return x; - /* sinh(tiny) = tiny with inexact */ + /* sinh(tiny) = tiny with inexact */ + } t = __expm1 (fabs (x)); if (ix < 0x3ff00000) return h * (2.0 * t - t * t / (t + one)); |