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[/] [or1k/] [trunk/] [linux/] [uClibc/] [libm/] [w_pow.c] - Blame information for rev 1765

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Line No. Rev Author Line
1 1325 phoenix
 
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/* @(#)w_pow.c 5.2 93/10/01 */
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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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/*
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 * wrapper pow(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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        double pow(double x, double y)  /* wrapper pow */
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#else
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        double pow(x,y)                 /* wrapper pow */
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        double x,y;
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#endif
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{
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#ifdef _IEEE_LIBM
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        return  __ieee754_pow(x,y);
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#else
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        double z;
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        z=__ieee754_pow(x,y);
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        if(_LIB_VERSION == _IEEE_|| isnan(y)) return z;
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        if(isnan(x)) {
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            if(y==0.0)
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                return __kernel_standard(x,y,42); /* pow(NaN,0.0) */
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            else
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                return z;
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        }
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        if(x==0.0){
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            if(y==0.0)
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                return __kernel_standard(x,y,20); /* pow(0.0,0.0) */
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            if(finite(y)&&y<0.0)
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                return __kernel_standard(x,y,23); /* pow(0.0,negative) */
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            return z;
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        }
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        if(!finite(z)) {
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            if(finite(x)&&finite(y)) {
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                if(isnan(z))
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                    return __kernel_standard(x,y,24); /* pow neg**non-int */
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                else
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                    return __kernel_standard(x,y,21); /* pow overflow */
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            }
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        }
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        if(z==0.0&&finite(x)&&finite(y))
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            return __kernel_standard(x,y,22); /* pow underflow */
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        return z;
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#endif
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}

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