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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libm/] [math/] [ef_scalb.c] - Blame information for rev 262

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Line No. Rev Author Line
1 207 jeremybenn
/* ef_scalb.c -- float version of e_scalb.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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#include "fdlibm.h"
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#include <limits.h>
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#ifdef _SCALB_INT
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#ifdef __STDC__
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        float __ieee754_scalbf(float x, int fn)
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#else
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        float __ieee754_scalbf(x,fn)
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        float x; int fn;
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#endif
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#else
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#ifdef __STDC__
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        float __ieee754_scalbf(float x, float fn)
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#else
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        float __ieee754_scalbf(x,fn)
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        float x, fn;
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#endif
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#endif
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{
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#ifdef _SCALB_INT
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        return scalbnf(x,fn);
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#else
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        if (isnan(x)||isnan(fn)) return x*fn;
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        if (!finitef(fn)) {
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            if(fn>(float)0.0) return x*fn;
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            else       return x/(-fn);
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        }
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        if (rintf(fn)!=fn) return (fn-fn)/(fn-fn);
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#if INT_MAX > 65000
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        if ( fn > (float)65000.0) return scalbnf(x, 65000);
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        if (-fn > (float)65000.0) return scalbnf(x,-65000);
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#else
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        if ( fn > (float)32000.0) return scalbnf(x, 32000);
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        if (-fn > (float)32000.0) return scalbnf(x,-32000);
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#endif
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        return scalbnf(x,(int)fn);
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#endif
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}

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