protected void Decode(int instruction)
{
_instruction = (Utils.CommandCode)((instruction & 0xF000) >> 12);
_register1 = (instruction & 0xF00) >> 8;
_register2 = (instruction & 0xF0) >> 4;
_register3 = instruction & 0xF;
_immediateValue = instruction & 0xFF;
}
private static void CompileThreeRegisterCommand(ref string[] values, Utils.CommandCode command)
{
var compiledCommand = command.ToInt() << 12;
compiledCommand = (CompileRegisterValue(ref values[0]) << 8) | compiledCommand;
compiledCommand = (CompileRegisterValue(ref values[1]) << 4) | compiledCommand;
compiledCommand = (CompileRegisterValue(ref values[2])) | compiledCommand;
FileStream.Add(compiledCommand);
}
public VM(int[] programStream)
{
/*
* 1.) operation type
* 2.) register
* 3-4.) immediate value or target registers
*/
_program = programStream;
_registers = new int[NumberOfRegisters];
_pc = 0;
_register1 = _register2 = _register3 = _immediateValue = 0;
_instruction = Halt;
_isRunning = true;
}
