diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-96/e_j1l.c')
-rw-r--r-- | sysdeps/ieee754/ldbl-96/e_j1l.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/sysdeps/ieee754/ldbl-96/e_j1l.c b/sysdeps/ieee754/ldbl-96/e_j1l.c index 1bd54995a8..46e28dfe11 100644 --- a/sysdeps/ieee754/ldbl-96/e_j1l.c +++ b/sysdeps/ieee754/ldbl-96/e_j1l.c @@ -72,6 +72,7 @@ */ #include <errno.h> +#include <float.h> #include <math.h> #include <math_private.h> @@ -150,8 +151,16 @@ __ieee754_j1l (long double x) } if (__glibc_unlikely (ix < 0x3fde)) /* |x| < 2^-33 */ { - if (huge + x > one) - return 0.5 * x; /* inexact if x!=0 necessary */ + if (huge + x > one) /* inexact if x!=0 necessary */ + { + long double ret = 0.5 * x; + if (fabsl (ret) < LDBL_MIN) + { + long double force_underflow = ret * ret; + math_force_eval (force_underflow); + } + return ret; + } } z = x * x; r = z * (R[0] + z * (R[1]+ z * (R[2] + z * (R[3] + z * R[4])))); |