public ExecuteAction Step()
{
Instruction nextInstruction = NextInstruction;
Trace?.TraceInformation("[{0}] {1}", ProgramCounter, nextInstruction);
var args = new InstructionEventArgs()
{
Instruction = nextInstruction
};
Executing?.Invoke(this, args);
if (args.Action == ExecuteAction.Break)
{
return(args.Action);
}
this.Operations[nextInstruction.Opcode](nextInstruction.Operand);
Executed?.Invoke(this, args);
if (!IsHalted)
{
if (nextInstruction.Opcode != OpCode.JMP &&
nextInstruction.Opcode != OpCode.TAC)
{
ProgramCounter++;
}
}
else
{
Halted?.Invoke(this, EventArgs.Empty);
}
return(args.Action);
}
public void Run()
{
BigInteger iptr = 0;
while (true)
{
var opCode = Memory[(int)iptr].ToString("D2");
var parameterModes = opCode.Length > 2 ? opCode.Substring(0, opCode.Length - 2) : "";
if (opCode.EndsWith(OpCodeAdd))
{
var modes = ParseParameterModes(parameterModes, 3);
var a = GetValueFromMemory(iptr + 1, modes[0]);
var b = GetValueFromMemory(iptr + 2, modes[1]);
checked
{
SetValueInMemory(a + b, iptr + 3, modes[2]);
}
iptr += 4;
}
else if (opCode.EndsWith(OpCodeMultiply))
{
var modes = ParseParameterModes(parameterModes, 3);
var a = GetValueFromMemory(iptr + 1, modes[0]);
var b = GetValueFromMemory(iptr + 2, modes[1]);
checked
{
SetValueInMemory(a * b, iptr + 3, modes[2]);
}
iptr += 4;
}
else if (opCode.EndsWith(OpCodeInput))
{
while (StdIn.Count == 0)
{
Thread.Sleep(1);
}
StdIn.TryDequeue(out var input);
var modes = ParseParameterModes(parameterModes, 1);
SetValueInMemory(input, iptr + 1, modes[0]);
iptr += 2;
}
else if (opCode.EndsWith(OpCodeOutput))
{
var modes = ParseParameterModes(parameterModes, 1);
var output = GetValueFromMemory(iptr + 1, modes[0]);
StdOut.Enqueue(output);
iptr += 2;
}
else if (opCode.EndsWith(OpCodeJumpIfNotZero))
{
var modes = ParseParameterModes(parameterModes, 2);
var value = GetValueFromMemory(iptr + 1, modes[0]);
if (value != 0)
{
var jumpAddress = GetValueFromMemory(iptr + 2, modes[1]);
iptr = jumpAddress;
}
else
{
iptr += 3;
}
}
else if (opCode.EndsWith(OpCodeJumpIfZero))
{
var modes = ParseParameterModes(parameterModes, 2);
var value = GetValueFromMemory(iptr + 1, modes[0]);
if (value == 0)
{
var jumpAddress = GetValueFromMemory(iptr + 2, modes[1]);
iptr = jumpAddress;
}
else
{
iptr += 3;
}
}
else if (opCode.EndsWith(OpCodeLessThan))
{
var modes = ParseParameterModes(parameterModes, 3);
var a = GetValueFromMemory(iptr + 1, modes[0]);
var b = GetValueFromMemory(iptr + 2, modes[1]);
if (a < b)
{
SetValueInMemory(1, iptr + 3, modes[2]);
}
else
{
SetValueInMemory(0, iptr + 3, modes[2]);
}
iptr += 4;
}
else if (opCode.EndsWith(OpCodeEquals))
{
var modes = ParseParameterModes(parameterModes, 3);
var a = GetValueFromMemory(iptr + 1, modes[0]);
var b = GetValueFromMemory(iptr + 2, modes[1]);
if (a == b)
{
SetValueInMemory(1, iptr + 3, modes[2]);
}
else
{
SetValueInMemory(0, iptr + 3, modes[2]);
}
iptr += 4;
}
else if (opCode.EndsWith(OpCodeRelativeBaseOffset))
{
var modes = ParseParameterModes(parameterModes, 1);
var offset = GetValueFromMemory(iptr + 1, modes[0]);
RelativeBaseAddress += offset;
iptr += 2;
}
else if (opCode.EndsWith(OpCodeBreak))
{
Halted?.Invoke();
break;
}
else
{
throw new System.Exception();
}
}
}