public void Evaluate(ParseTree tree, PowerPCMachine emulator)
{
foreach (var node in tree.Root.ChildNodes[0].ChildNodes)
{
var curNode = node.ChildNodes[0];
switch (curNode.Term.ToString())
{
case "add":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
var rb = NodeUtilities.UnwrapRegister(curNode.ChildNodes[2]);
emulator.GPR[rd] = emulator.GPR[ra] + emulator.GPR[rb];
break;
}
case "addi":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
var simm = NodeUtilities.ParseNumber(curNode.ChildNodes[2]);
emulator.GPR[rd] = emulator.GPR[ra] + simm;
break;
}
case "addc":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
var rb = NodeUtilities.UnwrapRegister(curNode.ChildNodes[2]);
emulator.GPR[rd] = emulator.GPR[ra] + emulator.GPR[rb];
//todo implement condition register functions
break;
}
case "and":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
var rb = NodeUtilities.UnwrapRegister(curNode.ChildNodes[2]);
emulator.GPR[rd] = emulator.GPR[ra] & emulator.GPR[rb];
break;
}
case "andc":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
var rb = NodeUtilities.UnwrapRegister(curNode.ChildNodes[2]);
emulator.GPR[rd] = emulator.GPR[ra] + ~emulator.GPR[rb];
break;
}
case "andi":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
var num = NodeUtilities.ParseNumber(curNode.ChildNodes[2]);
emulator.GPR[rd] = emulator.GPR[ra] & num;
break;
}
case "andis":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
var num = NodeUtilities.ParseNumber(curNode.ChildNodes[2]);
emulator.GPR[rd] = emulator.GPR[ra] & (num << 16);
break;
}
case "cmp":
{
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var rb = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
emulator.CR[0].setFlag(0, ra < rb);
emulator.CR[0].setFlag(1, ra > rb);
emulator.CR[0].setFlag(2, ra == rb);
break;
}
case "print":
{
if (curNode.ChildNodes.Count == 1)
{
var reg = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
print(String.Format("PRINT: r{0}: {1}", reg, emulator.GPR[reg]));
}
else if (curNode.ChildNodes.Count == 2)
{
var reg = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var reg2 = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
if (reg2 > reg)
{
for (int i = reg; i <= reg2; i++)
{
print(String.Format("PRINT: r{0}: {1}", i, emulator.GPR[i]));
}
}
else
{
print("PRINT: invalid print syntax");
}
}
else
{
//todo print all registers
var regStr = "";
for (int i = 0; i < 32; i++)
{
regStr += String.Format("r{0}: {1}\r\n", i, emulator.GPR[i]);
}
Console.Write(
"MACHINE PRINT\r\n{0}",
regStr
);
}
break;
}
case "li":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var num = NodeUtilities.ParseNumber(curNode.ChildNodes[1]);
emulator.GPR[rd] = num;
break;
}
case "sub":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
var rb = NodeUtilities.UnwrapRegister(curNode.ChildNodes[2]);
emulator.GPR[rd] = emulator.GPR[ra] - emulator.GPR[rb];
break;
}
case "subi":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
var simm = NodeUtilities.ParseNumber(curNode.ChildNodes[2]);
emulator.GPR[rd] = emulator.GPR[ra] - simm;
break;
}
default:
break;
}
}
}
public Emulator()
{
Instance = new PowerPCMachine();
parser = new Parser(language);
}
public void Evaluate(ParseTree tree, PowerPCMachine emulator)
{
foreach (var node in tree.Root.ChildNodes[0].ChildNodes)
{
var curNode = node.ChildNodes[0];
switch (curNode.Term.ToString())
{
case "add":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
var rb = NodeUtilities.UnwrapRegister(curNode.ChildNodes[2]);
emulator.GPR[rd] = emulator.GPR[ra] + emulator.GPR[rb];
break;
}
case "addi":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
var simm = NodeUtilities.ParseNumber(curNode.ChildNodes[2]);
emulator.GPR[rd] = emulator.GPR[ra] + simm;
break;
}
case "addc":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
var rb = NodeUtilities.UnwrapRegister(curNode.ChildNodes[2]);
emulator.GPR[rd] = emulator.GPR[ra] + emulator.GPR[rb];
//todo implement condition register functions
break;
}
case "and":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
var rb = NodeUtilities.UnwrapRegister(curNode.ChildNodes[2]);
emulator.GPR[rd] = emulator.GPR[ra] & emulator.GPR[rb];
break;
}
case "andc":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
var rb = NodeUtilities.UnwrapRegister(curNode.ChildNodes[2]);
emulator.GPR[rd] = emulator.GPR[ra] + ~emulator.GPR[rb];
break;
}
case "andi":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
var num = NodeUtilities.ParseNumber(curNode.ChildNodes[2]);
emulator.GPR[rd] = emulator.GPR[ra] & num;
break;
}
case "andis":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
var num = NodeUtilities.ParseNumber(curNode.ChildNodes[2]);
emulator.GPR[rd] = emulator.GPR[ra] & (num << 16);
break;
}
case "cmp":
{
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var rb = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
emulator.CR[0].setFlag(0, ra < rb);
emulator.CR[0].setFlag(1, ra > rb);
emulator.CR[0].setFlag(2, ra == rb);
break;
}
case "print":
{
if (curNode.ChildNodes.Count == 1)
{
var reg = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
print(String.Format("PRINT: r{0}: {1}", reg, emulator.GPR[reg]));
}
else if (curNode.ChildNodes.Count == 2)
{
var reg = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var reg2 = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
if (reg2 > reg)
{
for (int i = reg; i <= reg2; i++)
{
print(String.Format("PRINT: r{0}: {1}", i, emulator.GPR[i]));
}
}
else
{
print("PRINT: invalid print syntax");
}
}
else
{
//todo print all registers
var regStr = "";
for(int i = 0; i < 32; i++)
{
regStr += String.Format("r{0}: {1}\r\n", i, emulator.GPR[i]);
}
Console.Write(
"MACHINE PRINT\r\n{0}",
regStr
);
}
break;
}
case "li":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var num = NodeUtilities.ParseNumber(curNode.ChildNodes[1]);
emulator.GPR[rd] = num;
break;
}
case "sub":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
var rb = NodeUtilities.UnwrapRegister(curNode.ChildNodes[2]);
emulator.GPR[rd] = emulator.GPR[ra] - emulator.GPR[rb];
break;
}
case "subi":
{
var rd = NodeUtilities.UnwrapRegister(curNode.ChildNodes[0]);
var ra = NodeUtilities.UnwrapRegister(curNode.ChildNodes[1]);
var simm = NodeUtilities.ParseNumber(curNode.ChildNodes[2]);
emulator.GPR[rd] = emulator.GPR[ra] - simm;
break;
}
default:
break;
}
}
}
public Emulator()
{
Instance = new PowerPCMachine();
parser = new Parser(language);
}