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/* @(#)w_log.c 5.1 93/09/24 */
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/*
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 * ====================================================
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 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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 *
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 * Developed at SunPro, a Sun Microsystems, Inc. business.
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 * Permission to use, copy, modify, and distribute this
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 * software is freely granted, provided that this notice
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 * is preserved.
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 * ====================================================
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 */
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#ifndef lint
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static char rcsid[] = "$\Id: w_log.c,v 1.2 1995/05/30 05:51:33 rgrimes Exp $";
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#endif
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/*
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 * wrapper log(x)
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 */
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#include "math.h"
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#include "math_private.h"
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#ifdef __STDC__
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        double log(double x)            /* wrapper log */
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#else
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        double log(x)                   /* wrapper log */
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        double x;
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#endif
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{
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#ifdef _IEEE_LIBM
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        return __ieee754_log(x);
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#else
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        double z;
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        z = __ieee754_log(x);
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        if(_LIB_VERSION == _IEEE_ || isnan(x) || x > 0.0) return z;
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        if(x==0.0)
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            return __kernel_standard(x,x,16); /* log(0) */
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        else
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            return __kernel_standard(x,x,17); /* log(x<0) */
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#endif
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}