mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
fcf85197b3
--HG-- rename : js/src/js.c => js/src/js.cpp rename : js/src/jsapi.c => js/src/jsapi.cpp rename : js/src/jsarena.c => js/src/jsarena.cpp rename : js/src/jsarray.c => js/src/jsarray.cpp rename : js/src/jsatom.c => js/src/jsatom.cpp rename : js/src/jsbool.c => js/src/jsbool.cpp rename : js/src/jscntxt.c => js/src/jscntxt.cpp rename : js/src/jscpucfg.c => js/src/jscpucfg.cpp rename : js/src/jsdate.c => js/src/jsdate.cpp rename : js/src/jsdbgapi.c => js/src/jsdbgapi.cpp rename : js/src/jsdhash.c => js/src/jsdhash.cpp rename : js/src/jsdtoa.c => js/src/jsdtoa.cpp rename : js/src/jsemit.c => js/src/jsemit.cpp rename : js/src/jsexn.c => js/src/jsexn.cpp rename : js/src/jsfile.c => js/src/jsfile.cpp rename : js/src/jsfun.c => js/src/jsfun.cpp rename : js/src/jsgc.c => js/src/jsgc.cpp rename : js/src/jshash.c => js/src/jshash.cpp rename : js/src/jsinterp.c => js/src/jsinterp.cpp rename : js/src/jsiter.c => js/src/jsiter.cpp rename : js/src/jskwgen.c => js/src/jskwgen.cpp rename : js/src/jslock.c => js/src/jslock.cpp rename : js/src/jslog2.c => js/src/jslog2.cpp rename : js/src/jslong.c => js/src/jslong.cpp rename : js/src/jsmath.c => js/src/jsmath.cpp rename : js/src/jsnum.c => js/src/jsnum.cpp rename : js/src/jsobj.c => js/src/jsobj.cpp rename : js/src/jsopcode.c => js/src/jsopcode.cpp rename : js/src/jsparse.c => js/src/jsparse.cpp rename : js/src/jsprf.c => js/src/jsprf.cpp rename : js/src/jsregexp.c => js/src/jsregexp.cpp rename : js/src/jsscan.c => js/src/jsscan.cpp rename : js/src/jsscope.c => js/src/jsscope.cpp rename : js/src/jsscript.c => js/src/jsscript.cpp rename : js/src/jsstr.c => js/src/jsstr.cpp rename : js/src/jsutil.c => js/src/jsutil.cpp rename : js/src/jsxdrapi.c => js/src/jsxdrapi.cpp rename : js/src/jsxml.c => js/src/jsxml.cpp rename : js/src/prmjtime.c => js/src/prmjtime.cpp
95 lines
2.8 KiB
C++
95 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 4; 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
|
|
* Netscape Communications Corporation.
|
|
* 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 ***** */
|
|
|
|
#include "jsstddef.h"
|
|
#include "jsbit.h"
|
|
#include "jsutil.h"
|
|
|
|
/*
|
|
** Compute the log of the least power of 2 greater than or equal to n
|
|
*/
|
|
JS_PUBLIC_API(JSIntn) JS_CeilingLog2(JSUint32 n)
|
|
{
|
|
JSIntn log2;
|
|
|
|
JS_CEILING_LOG2(log2, n);
|
|
return log2;
|
|
}
|
|
|
|
/*
|
|
** Compute the log of the greatest power of 2 less than or equal to n.
|
|
** This really just finds the highest set bit in the word.
|
|
*/
|
|
JS_PUBLIC_API(JSIntn) JS_FloorLog2(JSUint32 n)
|
|
{
|
|
JSIntn log2;
|
|
|
|
JS_FLOOR_LOG2(log2, n);
|
|
return log2;
|
|
}
|
|
|
|
/*
|
|
* js_FloorLog2wImpl has to be defined only for 64-bit non-GCC case.
|
|
*/
|
|
#if !defined(JS_HAS_BUILTIN_BITSCAN64) && JS_BYTES_PER_WORD == 8
|
|
|
|
JSUword
|
|
js_FloorLog2wImpl(JSUword n)
|
|
{
|
|
JSUword log2, m;
|
|
|
|
JS_ASSERT(n != 0);
|
|
|
|
log2 = 0;
|
|
m = n >> 32;
|
|
if (m != 0) { n = m; log2 = 32; }
|
|
m = n >> 16;
|
|
if (m != 0) { n = m; log2 |= 16; }
|
|
m = n >> 8;
|
|
if (m != 0) { n = m; log2 |= 8; }
|
|
m = n >> 4;
|
|
if (m != 0) { n = m; log2 |= 4; }
|
|
m = n >> 2;
|
|
if (m != 0) { n = m; log2 |= 2; }
|
|
log2 |= (n >> 1);
|
|
|
|
return log2;
|
|
}
|
|
|
|
#endif
|