1
2/* @(#)w_log.c 1.3 95/01/18 */
3/*
4 * ====================================================
5 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
6 *
7 * Developed at SunSoft, a Sun Microsystems, Inc. business.
8 * Permission to use, copy, modify, and distribute this
9 * software is freely granted, provided that this notice
10 * is preserved.
11 * ====================================================
12 */
13
14/*
15 * wrapper ieee_log(x)
16 */
17
18#include "fdlibm.h"
19
20
21#ifdef __STDC__
22	double ieee_log(double x)		/* wrapper log */
23#else
24	double ieee_log(x)			/* wrapper log */
25	double x;
26#endif
27{
28#ifdef _IEEE_LIBM
29	return __ieee754_log(x);
30#else
31	double z;
32	z = __ieee754_log(x);
33	if(_LIB_VERSION == _IEEE_ || ieee_isnan(x) || x > 0.0) return z;
34	if(x==0.0)
35	    return __kernel_standard(x,x,16); /* ieee_log(0) */
36	else
37	    return __kernel_standard(x,x,17); /* ieee_log(x<0) */
38#endif
39}
40