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File: [cvs.NetBSD.org] / src / lib / libm / src / w_sqrt.c (download)

Revision 1.10, Tue Nov 19 19:24:34 2013 UTC (13 months ago) by joerg
Branch: MAIN
CVS Tags: yamt-pagecache-base9, tls-maxphys-base, tls-earlyentropy-base, tls-earlyentropy, riastradh-xf86-video-intel-2-7-1-pre-2-21-15, riastradh-drm2-base3, netbsd-7-base, netbsd-7, HEAD
Changes since 1.9: +7 -1 lines

Add cbrtl(3) and sqrtl(3), from FreeBSD.

/* @(#)w_sqrt.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.
 * ====================================================
 */

#include <sys/cdefs.h>
#if defined(LIBM_SCCS) && !defined(lint)
__RCSID("$NetBSD: w_sqrt.c,v 1.10 2013/11/19 19:24:34 joerg Exp $");
#endif

/*
 * wrapper sqrt(x)
 */

#include "namespace.h"
#include "math.h"
#include "math_private.h"

#ifndef __HAVE_LONG_DOUBLE
__strong_alias(_sqrtl, sqrt)
__weak_alias(sqrtl, _sqrtl)
#endif

double
sqrt(double x)		/* wrapper sqrt */
{
#ifdef _IEEE_LIBM
	return __ieee754_sqrt(x);
#else
	double z;
	z = __ieee754_sqrt(x);
	if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
	if(x<0.0) {
	    return __kernel_standard(x,x,26); /* sqrt(negative) */
	} else
	    return z;
#endif
}