diff options
Diffstat (limited to 'libc/math/w_atan2f.c')
| -rw-r--r-- | libc/math/w_atan2f.c | 56 |
1 files changed, 23 insertions, 33 deletions
diff --git a/libc/math/w_atan2f.c b/libc/math/w_atan2f.c index efb08f076..b3c65bfcb 100644 --- a/libc/math/w_atan2f.c +++ b/libc/math/w_atan2f.c @@ -1,46 +1,36 @@ -/* w_atan2f.c -- float version of w_atan2.c. - * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. - */ +/* Copyright (C) 2011 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@gmail.com>, 2011. -/* - * ==================================================== - * 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. - * ==================================================== - */ + 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. -#if defined(LIBM_SCCS) && !defined(lint) -static char rcsid[] = "$NetBSD: w_atan2f.c,v 1.3 1995/05/10 20:48:42 jtc Exp $"; -#endif + 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 atan2f(y,x) */ #include <math.h> -#include "math_private.h" +#include <math_private.h> -#ifdef __STDC__ - float __atan2f(float y, float x) /* wrapper atan2f */ -#else - float __atan2f(y,x) /* wrapper atan2 */ - float y,x; -#endif +float +__atan2f (float y, float x) { -#ifdef _IEEE_LIBM - return __ieee754_atan2f(y,x); -#else - float z; - z = __ieee754_atan2f(y,x); - if(_LIB_VERSION != _SVID_||__isnanf(x)||__isnanf(y)) return z; - if(x==0.0&&y==0.0) - return __kernel_standard(y,x,103); /* atan2(+-0,+-0) */ - return z; -#endif + if (__builtin_expect (x == 0.0f && y == 0.0f, 0) && _LIB_VERSION == _SVID_) + return __kernel_standard_f (y, x, 103); /* atan2(+-0,+-0) */ + + return __ieee754_atan2f (y, x); } weak_alias (__atan2f, atan2f) |