/** Fifth pass, produce Java byte code. */
public void byte_code(InstructionList il, MethodGen method, ConstantPoolGen cp) {
exprs[0].byte_code(il, method, cp);
if (unop != -1) { // Apply unary operand
if (unop == MINUS) {
il.append(InstructionConstants.INEG);
} else { // == NOT
il.append(new PUSH(cp, 1));
ASTFunDecl.push(); // Push TRUE
il.append(InstructionConstants.IXOR);
ASTFunDecl.pop();
}
} else { // Apply binary operand
BranchHandle bh = null;
exprs[1].byte_code(il, method, cp);
switch (kind) {
case PLUS:
il.append(InstructionConstants.IADD);
ASTFunDecl.pop();
break;
case MINUS:
il.append(InstructionConstants.ISUB);
ASTFunDecl.pop();
break;
case MULT:
il.append(InstructionConstants.IMUL);
ASTFunDecl.pop();
break;
case DIV:
il.append(InstructionConstants.IDIV);
ASTFunDecl.pop();
break;
case AND:
il.append(InstructionConstants.IAND);
ASTFunDecl.pop();
break;
case OR:
il.append(InstructionConstants.IOR);
ASTFunDecl.pop();
break;
/* Use negated operands */
case EQ:
bh = il.append(new IF_ICMPNE(null));
ASTFunDecl.pop(2);
break;
case LEQ:
bh = il.append(new IF_ICMPGT(null));
ASTFunDecl.pop(2);
break;
case GEQ:
bh = il.append(new IF_ICMPLT(null));
ASTFunDecl.pop(2);
break;
case NEQ:
bh = il.append(new IF_ICMPEQ(null));
ASTFunDecl.pop(2);
break;
case LT:
bh = il.append(new IF_ICMPGE(null));
ASTFunDecl.pop(2);
break;
case GT:
bh = il.append(new IF_ICMPLE(null));
ASTFunDecl.pop(2);
break;
default:
System.err.println("Ooops");
}
switch (kind) {
case EQ:
case LEQ:
case GEQ:
case NEQ:
case LT:
case GT:
BranchHandle g;
il.append(new PUSH(cp, 1));
g = il.append(new GOTO(null));
bh.setTarget(il.append(new PUSH(cp, 0)));
g.setTarget(il.append(InstructionConstants.NOP)); // May be optimized away later
ASTFunDecl.push();
break;
default:
break;
}
}
}
/** Fourth pass, produce Java code. */
public void code(StringBuffer buf) {
if (unop != -1) {
exprs[0].code(buf);
String top = ASTFunDecl.pop();
if (unop == MINUS) {
ASTFunDecl.push(buf, "-" + top);
} else {
ASTFunDecl.push(buf, "(" + top + " == 1)? 0 : 1)");
}
} else {
exprs[0].code(buf);
exprs[1].code(buf);
String _body_int2 = ASTFunDecl.pop();
String _body_int = ASTFunDecl.pop();
switch (kind) {
case PLUS:
ASTFunDecl.push(buf, _body_int + " + " + _body_int2);
break;
case MINUS:
ASTFunDecl.push(buf, _body_int + " - " + _body_int2);
break;
case MULT:
ASTFunDecl.push(buf, _body_int + " * " + _body_int2);
break;
case DIV:
ASTFunDecl.push(buf, _body_int + " / " + _body_int2);
break;
case AND:
ASTFunDecl.push(buf, toInt(toBool(_body_int) + " && " + toBool(_body_int2)));
break;
case OR:
ASTFunDecl.push(buf, toInt(toBool(_body_int) + " || " + toBool(_body_int2)));
break;
case EQ:
ASTFunDecl.push(buf, toInt(_body_int + " == " + _body_int2));
break;
case LEQ:
ASTFunDecl.push(buf, toInt(_body_int + " <= " + _body_int2));
break;
case GEQ:
ASTFunDecl.push(buf, toInt(_body_int + " >= " + _body_int2));
break;
case NEQ:
ASTFunDecl.push(buf, toInt(_body_int + " != " + _body_int2));
break;
case LT:
ASTFunDecl.push(buf, toInt(_body_int + " < " + _body_int2));
break;
case GT:
ASTFunDecl.push(buf, toInt(_body_int + " > " + _body_int2));
break;
default:
System.err.println("Ooops");
}
}
}
