diff options
Diffstat (limited to 'libm/w_atan2.c')
| -rw-r--r-- | libm/w_atan2.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/libm/w_atan2.c b/libm/w_atan2.c new file mode 100644 index 000000000..0b67e0b02 --- /dev/null +++ b/libm/w_atan2.c @@ -0,0 +1,42 @@ +/* @(#)w_atan2.c 5.1 93/09/24 */ +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +#if defined(LIBM_SCCS) && !defined(lint) +static char rcsid[] = "$NetBSD: w_atan2.c,v 1.6 1995/05/10 20:48:39 jtc Exp $"; +#endif + +/* + * wrapper atan2(y,x) + */ +#include "math.h" +#include "math_private.h" + + +#ifdef __STDC__ + double atan2(double y, double x) /* wrapper atan2 */ +#else + double atan2(y,x) /* wrapper atan2 */ + double y,x; +#endif +{ +#ifdef _IEEE_LIBM + return __ieee754_atan2(y,x); +#else + double z; + z = __ieee754_atan2(y,x); + if(_LIB_VERSION == _IEEE_||isnan(x)||isnan(y)) return z; + if(x==0.0&&y==0.0) { + return __kernel_standard(y,x,3); /* atan2(+-0,+-0) */ + } else + return z; +#endif +} |