[BACK]Return to w_log.c CVS log [TXT][DIR] Up to [cvs.NetBSD.org] / src / lib / libm / src
File: [cvs.NetBSD.org] / src / lib / libm / src / w_log.c (download)

Revision 1.3, Fri Feb 18 02:27:55 1994 UTC (30 years, 2 months ago) by jtc
Branch: MAIN
CVS Tags: netbsd-1-0-base, netbsd-1-0-RELEASE, netbsd-1-0-PATCH1, netbsd-1-0-PATCH06, netbsd-1-0-PATCH05, netbsd-1-0-PATCH04, netbsd-1-0-PATCH03, netbsd-1-0-PATCH02, netbsd-1-0-PATCH0, netbsd-1-0
Changes since 1.2: +4 -1 lines 

Add RCS ID's.

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

#ifndef lint
static char rcsid[] = "$Id: w_log.c,v 1.3 1994/02/18 02:27:55 jtc Exp $";
#endif

/*
 * wrapper log(x)
 */

#include <math.h>


#ifdef __STDC__
	double log(double x)		/* wrapper log */
#else
	double log(x)			/* wrapper log */
	double x;
#endif
{
#ifdef _IEEE_LIBM
	return __ieee754_log(x);
#else
	double z;
	z = __ieee754_log(x);
	if(_LIB_VERSION == _IEEE_ || isnan(x) || x > 0.0) return z;
	if(x==0.0)
	    return __kernel_standard(x,x,16); /* log(0) */
	else 
	    return __kernel_standard(x,x,17); /* log(x<0) */
#endif
}