diff options
Diffstat (limited to 'sysdeps/ieee754/dbl-64/s_erf.c')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/s_erf.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_erf.c b/sysdeps/ieee754/dbl-64/s_erf.c index e59f5f33ce..b4975a8af8 100644 --- a/sysdeps/ieee754/dbl-64/s_erf.c +++ b/sysdeps/ieee754/dbl-64/s_erf.c @@ -116,6 +116,7 @@ static char rcsid[] = "$NetBSD: s_erf.c,v 1.8 1995/05/10 20:47:05 jtc Exp $"; #include <float.h> #include <math.h> #include <math_private.h> +#include <fix-int-fp-convert-zero.h> static const double tiny = 1e-300, @@ -308,7 +309,10 @@ __erfc (double x) ix = hx & 0x7fffffff; if (ix >= 0x7ff00000) /* erfc(nan)=nan */ { /* erfc(+-inf)=0,2 */ - return (double) (((u_int32_t) hx >> 31) << 1) + one / x; + double ret = (double) (((u_int32_t) hx >> 31) << 1) + one / x; + if (FIX_INT_FP_CONVERT_ZERO && ret == 0.0) + return 0.0; + return ret; } if (ix < 0x3feb0000) /* |x|<0.84375 */ |