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/* @(#)w_acosh.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_acosh.c,v 1.2 1995/05/30 05:50:39 rgrimes Exp $";
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#endif
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/*
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 * wrapper acosh(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 acosh(double x)          /* wrapper acosh */
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#else
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        double acosh(x)                 /* wrapper acosh */
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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_acosh(x);
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#else
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        double z;
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        z = __ieee754_acosh(x);
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        if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
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        if(x<1.0) {
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                return __kernel_standard(x,x,29); /* acosh(x<1) */
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        } else
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            return z;
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#endif
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}