diff options
Diffstat (limited to 'src/svm/SVMVisitorImpl.java')
| -rw-r--r-- | src/svm/SVMVisitorImpl.java | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/src/svm/SVMVisitorImpl.java b/src/svm/SVMVisitorImpl.java new file mode 100644 index 0000000..391b986 --- /dev/null +++ b/src/svm/SVMVisitorImpl.java @@ -0,0 +1,156 @@ +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; + } + +} |