diff options
Diffstat (limited to 'src/third_party/js-1.7/fdlibm/w_gamma.c')
-rw-r--r-- | src/third_party/js-1.7/fdlibm/w_gamma.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/src/third_party/js-1.7/fdlibm/w_gamma.c b/src/third_party/js-1.7/fdlibm/w_gamma.c new file mode 100644 index 00000000000..9eb8e429c45 --- /dev/null +++ b/src/third_party/js-1.7/fdlibm/w_gamma.c @@ -0,0 +1,85 @@ +/* -*- 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_gamma.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. + * ==================================================== + * + */ + +/* double gamma(double x) + * Return the logarithm of the Gamma function of x. + * + * Method: call gamma_r + */ + +#include "fdlibm.h" + +extern int signgam; + +#ifdef __STDC__ + double fd_gamma(double x) +#else + double fd_gamma(x) + double x; +#endif +{ +#ifdef _IEEE_LIBM + return __ieee754_gamma_r(x,&signgam); +#else + double y; + y = __ieee754_gamma_r(x,&signgam); + if(_LIB_VERSION == _IEEE_) return y; + if(!fd_finite(y)&&fd_finite(x)) { + int err; + if(fd_floor(x)==x&&x<=0.0) + return __kernel_standard(x,x,41,&err); /* gamma pole */ + else + return __kernel_standard(x,x,40,&err); /* gamma overflow */ + } else + return y; +#endif +} |