gecko/js/src/nanojit/RegAlloc.cpp

99 lines
3.3 KiB
C++

/* -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 4 -*- */
/* vi: set ts=4 sw=4 expandtab: (add to ~/.vimrc: set modeline modelines=5) */
/* ***** 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 [Open Source Virtual Machine].
*
* The Initial Developer of the Original Code is
* Adobe System Incorporated.
* Portions created by the Initial Developer are Copyright (C) 2004-2007
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Adobe AS3 Team
*
* Alternatively, the contents of this file may be used under the terms of
* either 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
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* decision by deleting the provisions above and replace them with the notice
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* the provisions above, a recipient may use your version of this file under
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*
* ***** END LICENSE BLOCK ***** */
#include "nanojit.h"
namespace nanojit
{
#ifdef FEATURE_NANOJIT
#ifdef NJ_VERBOSE
void RegAlloc::formatRegisters(char* s, Fragment *frag)
{
if (!frag || !frag->lirbuf)
return;
LirNameMap *names = frag->lirbuf->names;
for (Register r = FirstReg; r <= LastReg; r = nextreg(r))
{
LIns *ins = getActive(r);
if (!ins)
continue;
NanoAssertMsg(!isFree(r), "Coding error; register is both free and active! " );
s += strlen(s);
const char* rname = ins->isQuad() ? fpn(r) : gpn(r);
sprintf(s, " %s(%s)", rname, names->formatRef(ins));
}
}
#endif /* NJ_VERBOSE */
#ifdef _DEBUG
uint32_t RegAlloc::countFree()
{
int cnt = 0;
for(Register i=FirstReg; i <= LastReg; i = nextreg(i))
cnt += isFree(i) ? 1 : 0;
return cnt;
}
uint32_t RegAlloc::countActive()
{
int cnt = 0;
for(Register i=FirstReg; i <= LastReg; i = nextreg(i))
cnt += active[i] ? 1 : 0;
return cnt;
}
void RegAlloc::checkCount()
{
NanoAssert(count == (countActive() + countFree()));
}
bool RegAlloc::isConsistent(Register r, LIns* i)
{
NanoAssert(r != UnknownReg);
return (isFree(r) && !getActive(r) && !i) ||
(!isFree(r) && getActive(r)== i && i );
}
#endif /*DEBUG*/
#endif /* FEATURE_NANOJIT */
}