diff options
Diffstat (limited to 'src/dom/js/fdlibm/s_cbrt.c')
| -rw-r--r-- | src/dom/js/fdlibm/s_cbrt.c | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/src/dom/js/fdlibm/s_cbrt.c b/src/dom/js/fdlibm/s_cbrt.c deleted file mode 100644 index 4aed19b1b..000000000 --- a/src/dom/js/fdlibm/s_cbrt.c +++ /dev/null @@ -1,133 +0,0 @@ -/* -*- 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 ***** */ - -/* @(#)s_cbrt.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. - * ==================================================== - * - */ - -#include "fdlibm.h" - -/* cbrt(x) - * Return cube root of x - */ -#ifdef __STDC__ -static const unsigned -#else -static unsigned -#endif - B1 = 715094163, /* B1 = (682-0.03306235651)*2**20 */ - B2 = 696219795; /* B2 = (664-0.03306235651)*2**20 */ - -#ifdef __STDC__ -static const double -#else -static double -#endif -C = 5.42857142857142815906e-01, /* 19/35 = 0x3FE15F15, 0xF15F15F1 */ -D = -7.05306122448979611050e-01, /* -864/1225 = 0xBFE691DE, 0x2532C834 */ -E = 1.41428571428571436819e+00, /* 99/70 = 0x3FF6A0EA, 0x0EA0EA0F */ -F = 1.60714285714285720630e+00, /* 45/28 = 0x3FF9B6DB, 0x6DB6DB6E */ -G = 3.57142857142857150787e-01; /* 5/14 = 0x3FD6DB6D, 0xB6DB6DB7 */ - -#ifdef __STDC__ - double fd_cbrt(double x) -#else - double fd_cbrt(x) - double x; -#endif -{ - fd_twoints u; - int hx; - double r,s,t=0.0,w; - unsigned sign; - - u.d = x; - hx = __HI(u); /* high word of x */ - sign=hx&0x80000000; /* sign= sign(x) */ - hx ^=sign; - if(hx>=0x7ff00000) return(x+x); /* cbrt(NaN,INF) is itself */ - if((hx|__LO(u))==0) { - x = u.d; - return(x); /* cbrt(0) is itself */ - } - u.d = x; - __HI(u) = hx; /* x <- |x| */ - x = u.d; - /* rough cbrt to 5 bits */ - if(hx<0x00100000) /* subnormal number */ - {u.d = t; __HI(u)=0x43500000; t=u.d; /* set t= 2**54 */ - t*=x; __HI(u)=__HI(u)/3+B2; - } - else { - u.d = t; __HI(u)=hx/3+B1; t = u.d; - } - - - /* new cbrt to 23 bits, may be implemented in single precision */ - r=t*t/x; - s=C+r*t; - t*=G+F/(s+E+D/s); - - /* chopped to 20 bits and make it larger than cbrt(x) */ - u.d = t; - __LO(u)=0; __HI(u)+=0x00000001; - t = u.d; - - /* one step newton iteration to 53 bits with error less than 0.667 ulps */ - s=t*t; /* t*t is exact */ - r=x/s; - w=t+t; - r=(r-t)/(w+r); /* r-s is exact */ - t=t+t*r; - - /* retore the sign bit */ - u.d = t; - __HI(u) |= sign; - t = u.d; - return(t); -} |