diff options
Diffstat (limited to 'math/w_atan2.c')
| -rw-r--r-- | math/w_atan2.c | 53 |
1 files changed, 23 insertions, 30 deletions
diff --git a/math/w_atan2.c b/math/w_atan2.c index 4fcaba9..7d61c72 100644 --- a/math/w_atan2.c +++ b/math/w_atan2.c @@ -1,18 +1,21 @@ -/* @(#)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. - * ==================================================== - */ +/* Copyright (C) 2011 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@gmail.com>, 2011. -#if defined(LIBM_SCCS) && !defined(lint) -static char rcsid[] = "$NetBSD: w_atan2.c,v 1.6 1995/05/10 20:48:39 jtc Exp $"; -#endif + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ /* * wrapper atan2(y,x) @@ -22,23 +25,13 @@ static char rcsid[] = "$NetBSD: w_atan2.c,v 1.6 1995/05/10 20:48:39 jtc Exp $"; #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 +double +__atan2 (double y, double x) { -#ifdef _IEEE_LIBM - return __ieee754_atan2(y,x); -#else - double z; - z = __ieee754_atan2(y,x); - if(_LIB_VERSION != _SVID_||__isnan(x)||__isnan(y)) return z; - if(x==0.0&&y==0.0) - return __kernel_standard(y,x,3); /* atan2(+-0,+-0) */ - return z; -#endif + 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); } weak_alias (__atan2, atan2) #ifdef NO_LONG_DOUBLE |