diff options
Diffstat (limited to 'math/w_sqrtf.c')
| -rw-r--r-- | math/w_sqrtf.c | 60 |
1 files changed, 23 insertions, 37 deletions
diff --git a/math/w_sqrtf.c b/math/w_sqrtf.c index 854d1cded2..fc088b6222 100644 --- a/math/w_sqrtf.c +++ b/math/w_sqrtf.c @@ -1,47 +1,33 @@ -/* w_sqrtf.c -- float version of w_sqrt.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_sqrtf.c,v 1.3 1995/05/10 20:49:59 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. -/* - * wrapper sqrtf(x) - */ + 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. */ #include <math.h> #include <math_private.h> -#ifdef __STDC__ - float __sqrtf(float x) /* wrapper sqrtf */ -#else - float sqrt(x) /* wrapper sqrtf */ - float x; -#endif + +/* wrapper sqrtf */ +float +__sqrtf (float x) { -#ifdef _IEEE_LIBM - return __ieee754_sqrtf(x); -#else - float z; - z = __ieee754_sqrtf(x); - if(_LIB_VERSION == _IEEE_ || __isnanf(x)) return z; - if(x<(float)0.0) { - /* sqrtf(negative) */ - return (float)__kernel_standard((double)x,(double)x,126); - } else - return z; -#endif + if (__builtin_expect (x < 0.0f, 0) && _LIB_VERSION != _IEEE_) + return __kernel_standard_f (x, x, 126); /* sqrt(negative) */ + + return __ieee754_sqrtf (x); } weak_alias (__sqrtf, sqrtf) |