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/* @(#)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 1.2 1995/05/30 05:51:33 rgrimes Exp $";
#endif
/*
* wrapper log(x)
*/
#include "math.h"
#include "math_private.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
}