-/* w_sqrtf.c -- float version of w_sqrt.c.
- * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
- */
+/* Copyright (C) 2011, 2012 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, see
+ <http://www.gnu.org/licenses/>. */
#include <math.h>
-#include "math_private.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 (isless (x, 0.0f), 0) && _LIB_VERSION != _IEEE_)
+ return __kernel_standard_f (x, x, 126); /* sqrt(negative) */
+
+ return __ieee754_sqrtf (x);
}
weak_alias (__sqrtf, sqrtf)