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/* e_scalbf.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 "math.h" |
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#include "math_private.h" |
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#ifdef _SCALB_INT |
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float |
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scalbf(float x, int fn) |
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{ |
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return scalbnf(x,fn); |
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} |
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DEF_NONSTD(scalbf); |
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#else |
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float |
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scalbf(float x, float fn) |
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{ |
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if (isnan(x)||isnan(fn)) return x*fn; |
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if (!isfinite(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 ( 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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return scalbnf(x,(int)fn); |
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} |
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DEF_NONSTD(scalbf); |
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#endif |