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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code, released
* March 31, 1998.
*
* The Initial Developer of the Original Code is
* Sun Microsystems, Inc.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* @(#)w_pow.c 1.3 95/01/18 */
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunSoft, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
/*
* wrapper pow(x,y) return x**y
*/
#include "fdlibm.h"
#ifdef __STDC__
double fd_pow(double x, double y) /* wrapper pow */
#else
double fd_pow(x,y) /* wrapper pow */
double x,y;
#endif
{
#ifdef _IEEE_LIBM
return __ieee754_pow(x,y);
#else
double z;
int err;
z=__ieee754_pow(x,y);
if(_LIB_VERSION == _IEEE_|| fd_isnan(y)) return z;
if(fd_isnan(x)) {
if(y==0.0)
return __kernel_standard(x,y,42,&err); /* pow(NaN,0.0) */
else
return z;
}
if(x==0.0){
if(y==0.0)
return __kernel_standard(x,y,20,&err); /* pow(0.0,0.0) */
if(fd_finite(y)&&y<0.0)
return __kernel_standard(x,y,23,&err); /* pow(0.0,negative) */
return z;
}
if(!fd_finite(z)) {
if(fd_finite(x)&&fd_finite(y)) {
if(fd_isnan(z))
return __kernel_standard(x,y,24,&err); /* pow neg**non-int */
else
return __kernel_standard(x,y,21,&err); /* pow overflow */
}
}
if(z==0.0&&fd_finite(x)&&fd_finite(y))
return __kernel_standard(x,y,22,&err); /* pow underflow */
return z;
#endif
}
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