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/* w_powf.c -- float version of w_pow.c.
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 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
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 */
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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_powf.c,v 1.2 1995/05/30 05:51:38 rgrimes Exp $";
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#endif
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/*
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 * wrapper powf(x,y) return x**y
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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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        float powf(float x, float y)    /* wrapper powf */
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#else
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        float powf(x,y)                 /* wrapper powf */
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        float x,y;
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#endif
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{
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#ifdef _IEEE_LIBM
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        return  __ieee754_powf(x,y);
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#else
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        float z;
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        z=__ieee754_powf(x,y);
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        if(_LIB_VERSION == _IEEE_|| isnanf(y)) return z;
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        if(isnanf(x)) {
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            if(y==(float)0.0)
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                /* powf(NaN,0.0) */
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                return (float)__kernel_standard((double)x,(double)y,142);
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            else
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                return z;
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        }
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        if(x==(float)0.0){
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            if(y==(float)0.0)
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                /* powf(0.0,0.0) */
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                return (float)__kernel_standard((double)x,(double)y,120);
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            if(finitef(y)&&y<(float)0.0)
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                /* powf(0.0,negative) */
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                return (float)__kernel_standard((double)x,(double)y,123);
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            return z;
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        }
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        if(!finitef(z)) {
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            if(finitef(x)&&finitef(y)) {
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                if(isnanf(z))
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                    /* powf neg**non-int */
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                    return (float)__kernel_standard((double)x,(double)y,124);
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                else
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                    /* powf overflow */
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                    return (float)__kernel_standard((double)x,(double)y,121);
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            }
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        }
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        if(z==(float)0.0&&finitef(x)&&finitef(y))
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            /* powf underflow */
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            return (float)__kernel_standard((double)x,(double)y,122);
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        return z;
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#endif
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}