mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
b21d256eb9
--HG-- extra : rebase_source : 9d85c87d2c12729873ad5af330edd2495d590d79
92 lines
3.1 KiB
C++
92 lines
3.1 KiB
C++
/* -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 4 -*- */
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/* vi: set ts=4 sw=4 expandtab: (add to ~/.vimrc: set modeline modelines=5) */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is [Open Source Virtual Machine].
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*
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* The Initial Developer of the Original Code is
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* Adobe System Incorporated.
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* Portions created by the Initial Developer are Copyright (C) 2004-2007
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Adobe AS3 Team
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nanojit.h"
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namespace nanojit
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{
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BitSet::BitSet(Allocator& allocator, int nbits)
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: allocator(allocator)
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, cap((nbits+63)>>6)
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, bits((int64_t*)allocator.alloc(cap * sizeof(int64_t)))
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{
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reset();
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}
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void BitSet::reset()
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{
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for (int i=0, n=cap; i < n; i++)
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bits[i] = 0;
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}
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bool BitSet::setFrom(BitSet& other)
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{
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int c = other.cap;
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if (c > cap)
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grow(c);
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int64_t *bits = this->bits;
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int64_t *otherbits = other.bits;
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int64_t newbits = 0;
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for (int i=0; i < c; i++) {
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int64_t b = bits[i];
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int64_t b2 = otherbits[i];
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newbits |= b2 & ~b; // bits in b2 that are not in b
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bits[i] = b|b2;
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}
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return newbits != 0;
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}
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/** keep doubling the bitset length until w fits */
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void BitSet::grow(int w)
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{
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int cap2 = cap;
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do {
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cap2 <<= 1;
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} while (w > cap2);
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int64_t *bits2 = (int64_t*) allocator.alloc(cap2 * sizeof(int64_t));
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int j=0;
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for (; j < cap; j++)
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bits2[j] = bits[j];
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for (; j < cap2; j++)
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bits2[j] = 0;
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cap = cap2;
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bits = bits2;
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}
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}
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