/*
* This file is part of JOP, the Java Optimized Processor
* see <http://www.jopdesign.com/>
*
* Copyright (C) 2010, Benedikt Huber (benedikt.huber@gmail.com)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.jopdesign.wcet.uppaal.translator.cache;
import com.jopdesign.common.MethodInfo;
import com.jopdesign.common.code.ControlFlowGraph;
import com.jopdesign.wcet.WCETProcessorModel;
import com.jopdesign.wcet.WCETTool;
import com.jopdesign.wcet.jop.VarBlockCache;
import com.jopdesign.wcet.uppaal.model.NTASystem;
import com.jopdesign.wcet.uppaal.translator.SystemBuilder;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
public class LRUVarBlockCacheBuilder extends VarBlockCacheBuilder {
public LRUVarBlockCacheBuilder(WCETTool p, VarBlockCache cache, Set<MethodInfo> methods) {
super(p, cache, methods);
}
@Override
protected int numBlocks() {
return this.cache.getNumBlocks();
}
@Override
public void appendDeclarations(NTASystem system,String NUM_METHODS) {
super.appendDeclarations(system, NUM_METHODS);
system.appendDeclaration(
"/* LRU Cache Sim */"+
"void access_cache(int mid) {\n"+
" int i = 0;\n"+
" int sz = NUM_BLOCKS[mid];\n"+
" if(cache[sz-1] == mid) { /* No Change */\n" +
" lastHit = true;\n" +
" return; \n"+
" }\n" +
" lastHit = false;\n"+
" /* search */\n" +
" for(i = sz; ! lastHit && i < "+numBlocks()+"; i++) {\n"+
" if(cache[i] == mid) {\n"+
" lastHit = true;\n"+
" }\n"+
" }\n"+
" /* i points to the element after tag, move back */"+
" for(i = i-1; i >= sz; --i) {\n"+
" cache[i]=cache[i-sz];\n"+
" }\n"+
" for(i = 0; i < sz-1; i++) {\n"+
" cache[i] = "+NUM_METHODS+";\n"+
" }\n"+
" cache[i] = mid;\n"+
"}\n");
}
protected StringBuilder initCache(String NUM_METHODS) {
List<Object> cacheElems = new ArrayList<Object>();
for(int i = 0; i < numBlocks(); i++) cacheElems.add(NUM_METHODS);
// FIXME check: this has been "blocksOf(0)", check if this is the same!!
MethodInfo method = project.getProjectConfig().getTargetMethodInfo();
cacheElems.set(blocksOf(method)-1,0);
return SystemBuilder.constArray(cacheElems);
}
public long getWaitTime(WCETProcessorModel proc, ControlFlowGraph cfg, boolean isInvoke) {
return proc.getMethodCache().getMissPenalty(cfg.getNumberOfWords(), isInvoke);
}
}