public Simulator(string ver)
{
switch (ver)
{
case "MIPS": {
mips = new MIPS();
break;
}
}
}
public override string GenerateCode()
{
var s = "";
var reg1 = "";
var exp = Childs[0];//why it only has one son
var es = exp.GenerateCode();
reg1 = MIPS.LastReg();// here we asume that an int has been loaded to the last position
//s += "\t# Assign\n";
s += MIPS.Emit(MIPS.Opcodes.usw, reg1, ID + "\t\t\t# " + ID);
return(es + s);
}
public override string GenerateCode()
{
MIPS.ifCount++;
string actualif = MIPS.ifCount.ToString();
string tempReg = MIPS.GetReg();
string result = "\t#if \n";
string ifCode = IfExp.GenerateCode();
string ifReg = MIPS.LastReg();
result += ifCode;
result += MIPS.Emit(MIPS.Opcodes.bne, ifReg, "1", "else" + actualif);
string thenCode = ThenExp.GenerateCode();
result += thenCode;
result += MIPS.Emit(MIPS.Opcodes.move, tempReg, MIPS.LastReg());
result += MIPS.Emit(MIPS.Opcodes.b, "endif" + actualif);
result += "\telse" + actualif + ":\n";
string elseCode = ElseExp.GenerateCode();
result += elseCode;
result += MIPS.Emit(MIPS.Opcodes.move, tempReg, MIPS.LastReg());
result += "\tendif" + actualif + ":\n";
string resultReg = MIPS.GetReg();
result += MIPS.Emit(MIPS.Opcodes.move, resultReg, tempReg);
return(result);
}
