diff options
Diffstat (limited to 'libc/math/w_sqrtl.c')
| -rw-r--r-- | libc/math/w_sqrtl.c | 62 |
1 files changed, 24 insertions, 38 deletions
diff --git a/libc/math/w_sqrtl.c b/libc/math/w_sqrtl.c index 0b03eebe1..0c446295c 100644 --- a/libc/math/w_sqrtl.c +++ b/libc/math/w_sqrtl.c @@ -1,47 +1,33 @@ -/* w_sqrtl.c -- long double version of w_sqrt.c. - * Conversion to long double by Ulrich Drepper, - * Cygnus Support, drepper@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: $"; -#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 sqrtl(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" +#include <math_private.h> -#ifdef __STDC__ - long double __sqrtl(long double x) /* wrapper sqrtl */ -#else - long double __sqrtl(x) /* wrapper sqrtl */ - long double x; -#endif + +/* wrapper sqrtl */ +long double +__sqrtl (long double x) { -#ifdef _IEEE_LIBM - return __ieee754_sqrtl(x); -#else - long double z; - z = __ieee754_sqrtl(x); - if(_LIB_VERSION == _IEEE_ || __isnanl(x)) return z; - if(x<0.0) { - return __kernel_standard(x,x,226); /* sqrt(negative) */ - } else - return z; -#endif + if (__builtin_expect (x < 0.0L, 0) && _LIB_VERSION != _IEEE_) + return __kernel_standard (x, x, 226); /* sqrt(negative) */ + + return __ieee754_sqrtl (x); } weak_alias (__sqrtl, sqrtl) |