public void tox86(Genx86 generator) throws IOException, InvalidCodeException {
left.register = register;
right.register = register + 1;
String leftReg = generator.regName(left.register, left.type);
String rightReg = generator.regName(right.register, right.type);
// save
generator.write(generator.save(register + 1));
left.tox86(generator);
right.tox86(generator);
generator.write(generator.compare(leftReg, rightReg, left.type, right.type));
switch (operator) {
case sym.LT:
lowerThan(generator, leftReg, rightReg, false);
break;
case sym.GT:
greaterThan(generator, leftReg, rightReg, false);
break;
case sym.LTE:
lowerThan(generator, leftReg, rightReg, true);
break;
case sym.GTE:
greaterThan(generator, leftReg, rightReg, true);
break;
case sym.SHEQ:
equal(generator, leftReg, rightReg, false);
break;
case sym.DEEQ:
equal(generator, leftReg, rightReg, true);
break;
case sym.NOEQ:
notEqual(generator, leftReg, rightReg);
}
// restore
generator.write(generator.restore(register + 1));
generator.write(generator.jump(noLabel));
}
public void notEqual(Genx86 generator, String a, String b)
throws IOException, InvalidCodeException {
generator.write(generator.jne(yesLabel));
}
public void equal(Genx86 generator, String a, String b, boolean deep)
throws IOException, InvalidCodeException {
generator.write(generator.je(yesLabel));
}
public void greaterThan(Genx86 generator, String a, String b, boolean orEqual)
throws IOException, InvalidCodeException {
if (orEqual) generator.write(generator.jge(yesLabel));
else generator.write(generator.jg(yesLabel));
}