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File: [cvs.NetBSD.org] / src / lib / libm / src / w_atan2.c (download)
Revision 1.7, Thu Oct 9 11:34:07 1997 UTC (26 years, 5 months ago) by lukem
rcsid facism, WARNSify |
/* @(#)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. * ==================================================== */ #include <sys/cdefs.h> #if defined(LIBM_SCCS) && !defined(lint) __RCSID("$NetBSD: w_atan2.c,v 1.7 1997/10/09 11:34:07 lukem 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 }