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- #include <math.h>
- #include "math_private.h"
- #if defined(__UCLIBC_HAS_FENV__)
- #include <errno.h>
- #endif
- double
- atan2 (double y, double x)
- {
- #if defined(__UCLIBC_HAS_FENV__)
- double z;
- if (__builtin_expect (x == 0.0 && y == 0.0, 0) && _LIB_VERSION == _SVID_)
- return __kernel_standard (y, x, 3);
- z = __ieee754_atan2 (y, x);
- if (__builtin_expect (z == 0.0 && y != 0.0 && isfinite (x),0))
- __set_errno (ERANGE);
- return z;
- #else
- return __ieee754_atan2 (y, x);
- #endif
- }
- libm_hidden_def(atan2)
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