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/* w_logf.c -- float version of w_log.c.
 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
 */

/*
 * ====================================================
 * 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_logf.c,v 1.2 1995/05/30 05:51:36 rgrimes Exp $";
#endif

/*
 * wrapper logf(x)
 */

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


#ifdef __STDC__
        float logf(float x)             /* wrapper logf */
#else
        float logf(x)                   /* wrapper logf */
        float x;
#endif
{
#ifdef _IEEE_LIBM
        return __ieee754_logf(x);
#else
        float z;
        z = __ieee754_logf(x);
        if(_LIB_VERSION == _IEEE_ || isnanf(x) || x > (float)0.0) return z;
        if(x==(float)0.0)
            /* logf(0) */
            return (float)__kernel_standard((double)x,(double)x,116);
        else
            /* logf(x<0) */
            return (float)__kernel_standard((double)x,(double)x,117);
#endif
}