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package svm;
import java.util.HashMap;
public class SVMVisitorImpl extends SVMBaseVisitor<Void> {
public AssemblyClass[] code = new AssemblyClass[ExecuteVM.CODESIZE];
private int i = 0;
private HashMap<String,Integer> labelAdd = new HashMap<String,Integer>();
// definisce a quale linea di codice corrisponde una etichetta
private HashMap<Integer,String> labelRef = new HashMap<Integer,String>();
// definisce l'insieme di linee di codice che contengono una certa etichetta
public Void visitAssembly(SVMParser.AssemblyContext ctx) {
visitChildren(ctx);
//printlabeladd() ; // checks
//printlabelref() ; // checks
for (Integer refAdd : labelRef.keySet()) {
int tmp = refAdd ;
String s = labelRef.get(refAdd) ;
if (code[tmp] == null) {
code[tmp] = new AssemblyClass(labelAdd.get(s), null, null, null);
} else {
code[tmp].setArg1(labelAdd.get(s).toString());
}
}
return null;
}
public void printlabeladd() {
for (String m : labelAdd.keySet()) {
System.out.println("chiave: " + m + " valore: " + labelAdd.get(m)) ;
}
}
public void printlabelref() {
for (Integer m : labelRef.keySet()) {
System.out.println("indirizzo: " + m + " etichetta: " + labelRef.get(m)) ;
}
}
public Void visitInstruction(SVMParser.InstructionContext ctx) {
switch (ctx.getStart().getType()) {
case SVMLexer.LOAD:
code[i] = new AssemblyClass(SVMParser.LOAD, ctx.REG(0).toString(), ctx.NUMBER().toString(),ctx.REG(1).toString());
i = i+1 ;
break;
case SVMLexer.STORE:
code[i] = new AssemblyClass(SVMParser.STORE, ctx.REG(0).toString(), ctx.NUMBER().toString(),ctx.REG(1).toString());
i = i+1 ;
break;
case SVMLexer.STOREI:
code[i] = new AssemblyClass(SVMParser.STOREI, ctx.REG(0).toString(), ctx.NUMBER().toString(), null);
i = i+1 ;
break;
case SVMLexer.MOVE:
code[i] = new AssemblyClass(SVMParser.MOVE, ctx.REG(0).toString(), ctx.REG(1).toString(), null);
i = i+1 ;
break;
case SVMLexer.ADD:
code[i] = new AssemblyClass(SVMParser.ADD, ctx.REG(0).toString(), ctx.REG(1).toString(), null);
i = i+1 ;
break;
case SVMLexer.ADDI:
code[i] = new AssemblyClass(SVMParser.ADDI, ctx.REG(0).toString(), ctx.NUMBER().toString(), null);
i = i+1 ;
break;
case SVMLexer.SUB:
code[i] = new AssemblyClass(SVMParser.SUB, ctx.REG(0).toString(), ctx.REG(1).toString(), null);
i = i+1 ;
break;
case SVMLexer.SUBI:
code[i] = new AssemblyClass(SVMParser.SUBI, ctx.REG(0).toString(), ctx.NUMBER().toString(), null);
i = i+1 ;
break;
case SVMLexer.MUL:
code[i] = new AssemblyClass(SVMParser.MUL, ctx.REG(0).toString(), ctx.REG(1).toString(), null);
i = i+1 ;
break;
case SVMLexer.MULI:
code[i] = new AssemblyClass(SVMParser.MULI, ctx.REG(0).toString(), ctx.NUMBER().toString(), null);
i = i+1 ;
break;
case SVMLexer.DIV:
code[i] = new AssemblyClass(SVMParser.DIV, ctx.REG(0).toString(), ctx.REG(1).toString(), null);
i = i+1 ;
break;
case SVMLexer.DIVI:
code[i] = new AssemblyClass(SVMParser.DIVI, ctx.REG(0).toString(), ctx.NUMBER().toString(), null);
i = i+1 ;
break;
case SVMLexer.PUSH:
if (ctx.n != null) {
code[i] = new AssemblyClass(SVMParser.PUSH, ctx.n.getText(), null, null);
} else {
code[i] = new AssemblyClass(SVMParser.PUSH, ctx.l.getText(), null, null);
labelRef.put(i, ctx.l.getText());
}
i = i+1 ;
break;
case SVMLexer.PUSHR:
code[i] = new AssemblyClass(SVMParser.PUSHR, ctx.REG(0).toString(), null, null);
i = i+1 ;
break;
case SVMLexer.POP:
code[i] = new AssemblyClass(SVMParser.POP, null, null, null);
i = i+1 ;
break;
case SVMLexer.POPR:
code[i] = new AssemblyClass(SVMParser.POPR, ctx.REG(0).toString(), null, null);
i = i+1 ;
break;
case SVMLexer.LABEL:
labelAdd.put(ctx.l.getText(),i);
break;
case SVMLexer.BRANCH:
code[i] = new AssemblyClass(SVMParser.BRANCH, ctx.LABEL().toString(), null, null);
i = i+1 ;
labelRef.put(i, (ctx.LABEL() != null ? ctx.LABEL().toString() : null));
i = i+1 ;
break;
case SVMLexer.BRANCHEQ:
code[i] = new AssemblyClass(SVMParser.BRANCHEQ, ctx.REG(0).toString(), ctx.REG(1).toString(), ctx.LABEL().toString());
i = i+1 ;
labelRef.put(i, (ctx.LABEL() != null ? ctx.LABEL().toString() : null));
i = i+1 ;
break;
case SVMLexer.BRANCHLESSEQ:
code[i] = new AssemblyClass(SVMParser.BRANCHLESSEQ, ctx.REG(0).toString(), ctx.REG(1).toString(), ctx.LABEL().toString());
i = i+1 ;
labelRef.put(i, (ctx.LABEL() != null ? ctx.LABEL().toString() : null));
i = i+1 ;
break;
case SVMLexer.JUMPSUB:
code[i] = new AssemblyClass(SVMParser.JUMPSUB, ctx.LABEL().toString(), null, null);
labelRef.put(i, ctx.LABEL().toString() );
i = i+1 ;
break;
case SVMLexer.RETURNSUB:
code[i] = new AssemblyClass(SVMParser.RETURNSUB, ctx.REG(0).toString(), null, null);
i = i+1 ;
break;
case SVMLexer.HALT:
code[i] = new AssemblyClass(SVMParser.HALT, null, null, null);
i = i+1 ;
break;
default:
break; // Invalid instruction
}
return null;
}
}
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