diff options
Diffstat (limited to 'math/w_atan2.c')
| -rw-r--r-- | math/w_atan2.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/math/w_atan2.c b/math/w_atan2.c index efbf0b3..c56d7b6 100644 --- a/math/w_atan2.c +++ b/math/w_atan2.c @@ -20,6 +20,7 @@ * wrapper atan2(y,x) */ +#include <errno.h> #include <math.h> #include <math_private.h> @@ -27,10 +28,15 @@ double __atan2 (double y, double x) { + double z; + if (__builtin_expect (x == 0.0 && y == 0.0, 0) && _LIB_VERSION == _SVID_) return __kernel_standard (y, x, 3); /* atan2(+-0,+-0) */ - return __ieee754_atan2 (y, x); + z = __ieee754_atan2 (y, x); + if (__glibc_unlikely (z == 0.0 && y != 0.0 && __finite (x))) + __set_errno (ERANGE); + return z; } weak_alias (__atan2, atan2) #ifdef NO_LONG_DOUBLE |