diff options
Diffstat (limited to 'src/third_party/js-1.7/fdlibm/s_scalbn.c')
| -rw-r--r-- | src/third_party/js-1.7/fdlibm/s_scalbn.c | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/src/third_party/js-1.7/fdlibm/s_scalbn.c b/src/third_party/js-1.7/fdlibm/s_scalbn.c deleted file mode 100644 index 3deeaa3057e..00000000000 --- a/src/third_party/js-1.7/fdlibm/s_scalbn.c +++ /dev/null @@ -1,107 +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_scalbn.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. - * ==================================================== - */ - -/* - * scalbn (double x, int n) - * scalbn(x,n) returns x* 2**n computed by exponent - * manipulation rather than by actually performing an - * exponentiation or a multiplication. - */ - -#include "fdlibm.h" - -#ifdef __STDC__ -static const double -#else -static double -#endif -two54 = 1.80143985094819840000e+16, /* 0x43500000, 0x00000000 */ -twom54 = 5.55111512312578270212e-17, /* 0x3C900000, 0x00000000 */ -really_big = 1.0e+300, -tiny = 1.0e-300; - -#ifdef __STDC__ - double fd_scalbn (double x, int n) -#else - double fd_scalbn (x,n) - double x; int n; -#endif -{ - fd_twoints u; - int k,hx,lx; - u.d = x; - hx = __HI(u); - lx = __LO(u); - k = (hx&0x7ff00000)>>20; /* extract exponent */ - if (k==0) { /* 0 or subnormal x */ - if ((lx|(hx&0x7fffffff))==0) return x; /* +-0 */ - x *= two54; - u.d = x; - hx = __HI(u); - k = ((hx&0x7ff00000)>>20) - 54; - if (n< -50000) return tiny*x; /*underflow*/ - } - if (k==0x7ff) return x+x; /* NaN or Inf */ - k = k+n; - if (k > 0x7fe) return really_big*fd_copysign(really_big,x); /* overflow */ - if (k > 0) /* normal result */ - {u.d = x; __HI(u) = (hx&0x800fffff)|(k<<20); x = u.d; return x;} - if (k <= -54) { - if (n > 50000) /* in case integer overflow in n+k */ - return really_big*fd_copysign(really_big,x); /*overflow*/ - else return tiny*fd_copysign(tiny,x); /*underflow*/ - } - k += 54; /* subnormal result */ - u.d = x; - __HI(u) = (hx&0x800fffff)|(k<<20); - x = u.d; - return x*twom54; -} |