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bb7e9793cf
* * * Bug 468484 - ifdef-guard members of avmplus::Config structure that broke ARM build.
184 lines
4.9 KiB
C++
184 lines
4.9 KiB
C++
/* -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 4 -*- */
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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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#ifdef FEATURE_NANOJIT
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/**
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* Generic register allocation routines.
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*/
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void RegAlloc::clear()
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{
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free = 0;
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used = 0;
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memset(active, 0, (LastReg+1) * sizeof(LIns*));
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}
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bool RegAlloc::isFree(Register r)
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{
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NanoAssert(r != UnknownReg);
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return (free & rmask(r)) != 0;
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}
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void RegAlloc::addFree(Register r)
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{
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NanoAssert(!isFree(r));
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free |= rmask(r);
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}
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void RegAlloc::removeFree(Register r)
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{
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NanoAssert(isFree(r));
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free &= ~rmask(r);
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}
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void RegAlloc::addActive(Register r, LIns* v)
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{
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// Count++;
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NanoAssert(v && r != UnknownReg && active[r] == NULL );
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active[r] = v;
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useActive(r);
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}
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void RegAlloc::useActive(Register r)
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{
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NanoAssert(r != UnknownReg && active[r] != NULL);
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usepri[r] = priority++;
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}
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void RegAlloc::removeActive(Register r)
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{
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//registerReleaseCount++;
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NanoAssert(r != UnknownReg);
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NanoAssert(active[r] != NULL);
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// remove the given register from the active list
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active[r] = NULL;
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}
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void RegAlloc::retire(Register r)
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{
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NanoAssert(r != UnknownReg);
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NanoAssert(active[r] != NULL);
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active[r] = NULL;
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free |= rmask(r);
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}
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// scan table for instruction with the lowest priority, meaning it is used
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// furthest in the future.
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LIns* Assembler::findVictim(RegAlloc ®s, RegisterMask allow)
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{
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NanoAssert(allow != 0);
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LIns *i, *a=0;
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int allow_pri = 0x7fffffff;
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for (Register r=FirstReg; r <= LastReg; r = nextreg(r))
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{
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if ((allow & rmask(r)) && (i = regs.getActive(r)) != 0)
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{
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int pri = canRemat(i) ? 0 : regs.getPriority(r);
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if (!a || pri < allow_pri) {
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a = i;
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allow_pri = pri;
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}
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}
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}
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NanoAssert(a != 0);
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return a;
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}
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#ifdef NJ_VERBOSE
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/* static */ void RegAlloc::formatRegisters(RegAlloc& regs, char* s, Fragment *frag)
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{
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if (!frag || !frag->lirbuf)
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return;
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LirNameMap *names = frag->lirbuf->names;
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for(int i=0; i<(LastReg+1); i++)
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{
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LIns* ins = regs.active[i];
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Register r = (Register)i;
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if (ins && regs.isFree(r))
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{ NanoAssertMsg( 0, "Coding error; register is both free and active! " ); }
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//if (!ins && !regs.isFree(r))
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// { NanoAssertMsg( 0, "Coding error; register is not in the free list when it should be" ); }
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if (!ins)
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continue;
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s += strlen(s);
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const char* rname = ins->isQuad() ? fpn(r) : gpn(r);
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sprintf(s, " %s(%s)", rname, names->formatRef(ins));
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}
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}
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#endif /* NJ_VERBOSE */
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#ifdef _DEBUG
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uint32_t RegAlloc::countFree()
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{
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int cnt = 0;
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for(Register i=FirstReg; i <= LastReg; i = nextreg(i))
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cnt += isFree(i) ? 1 : 0;
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return cnt;
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}
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uint32_t RegAlloc::countActive()
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{
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int cnt = 0;
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for(Register i=FirstReg; i <= LastReg; i = nextreg(i))
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cnt += active[i] ? 1 : 0;
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return cnt;
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}
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void RegAlloc::checkCount()
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{
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NanoAssert(count == (countActive() + countFree()));
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}
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bool RegAlloc::isConsistent(Register r, LIns* i)
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{
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NanoAssert(r != UnknownReg);
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return (isFree(r) && !getActive(r) && !i) ||
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(!isFree(r) && getActive(r)== i && i );
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}
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#endif /*DEBUG*/
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#endif /* FEATURE_NANOJIT */
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}
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