author | William Roberts <williamr@symbian.org> |
Thu, 22 Jul 2010 16:48:56 +0100 | |
branch | GCC_SURGE |
changeset 45 | 4b03adbd26ca |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
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/*-------------------------------------------------------------------- |
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*© Portions copyright (c) 2006 Nokia Corporation. All rights reserved. |
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*-------------------------------------------------------------------- |
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*/ |
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/* @(#)e_scalb.c 1.3 95/01/18 */ |
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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 SunSoft, 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 __SYMBIAN32__ |
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#ifndef lint |
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static char rcsid[] = "$FreeBSD: src/lib/msun/src/e_scalb.c,v 1.12 2005/02/04 18:26:06 das Exp $"; |
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#endif |
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#endif //__SYMBIAN32__ |
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|
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/* |
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* __ieee754_scalb(x, fn) is provide for |
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* passing various standard test suite. One |
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* should use scalbn() instead. |
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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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|
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#ifdef _SCALB_INT |
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EXPORT_C double |
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__ieee754_scalb(double x, int fn) |
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#else |
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EXPORT_C double |
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__ieee754_scalb(double x, double fn) |
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#endif |
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{ |
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#ifdef _SCALB_INT |
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return scalbn(x,fn); |
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#else |
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if (isnan(x)||isnan(fn)) return x*fn; |
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if (!finite(fn)) { |
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if(fn>0.0) return x*fn; |
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else return x/(-fn); |
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} |
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if (rint(fn)!=fn) return (fn-fn)/(fn-fn); |
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if ( fn > 65000.0) return scalbn(x, 65000); |
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if (-fn > 65000.0) return scalbn(x,-65000); |
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return scalbn(x,(int)fn); |
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#endif |
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} |