public void SquareNumberInCpu64ShouldDrawErrorMessageWhenValueIsGreaterThanMaxValue()
{
var cpu = new Cpu64(4);
var motherboardMock = new Mock<IMotherboard>();
motherboardMock.Setup(x => x.LoadRamValue()).Returns(Cpu64.MaxValue + 1);
cpu.AttachTo(motherboardMock.Object);
cpu.SquareNumber();
motherboardMock.Verify(x => x.DrawOnVideoCard(
It.Is<string>(param => param == Cpu.NumberTooHighMessage)));
}
public void SquareNumberInCpu64ShouldDrawErrorMessageWhenValueIsGreaterThanMaxValue()
{
var cpu = new Cpu64(4);
var motherboardMock = new Mock <IMotherboard>();
motherboardMock.Setup(x => x.LoadRamValue()).Returns(Cpu64.MaxValue + 1);
cpu.AttachTo(motherboardMock.Object);
cpu.SquareNumber();
motherboardMock.Verify(x => x.DrawOnVideoCard(
It.Is <string>(param => param == Cpu.NumberTooHighMessage)));
}
public void Run(IEnumerable <byte> program)
{
// Init the core
Memory.Write(BaseAddres, program);
Register.WriteUnsignedInt(Register.ProgramCounter, BaseAddres);
var decoder = new InstructionDecoder(EndianCoding);
var typeDecoder = new TypeDecoder();
// Create a simple bootstrap CPU
var cpu = new Cpu64();
cpu.AssignMemory(Memory);
cpu.AssignRegister(Register);
cpu.AssignEEI(Environment);
cpu.AssignRasStack(RasStack);
cpu.AssignCrs(CsrRegister);
cpu.Init();
// Fetch the first instruction and run the loop
var pc = Register.ReadUnsignedInt(Register.ProgramCounter);
// Get the first 2 Bytes from the Base Address aka PC
var instructionCoding = Memory.GetHalfWord(pc);
while (ContinueIfValid(instructionCoding))
{
// Loop for the commands
var instruction = decoder.Decode(instructionCoding);
InstructionsProcessed.Add(instruction);
// If the decoder cannot decode the parameter pattern, throw an exception
if (instruction.Type == InstructionType.Unknown)
{
string unknownOpCodeErrorMessage = String.Format("Error: OpCode = {0}", instruction.OpCode);
throw new OpCodeNotSupportedException(unknownOpCodeErrorMessage)
{
Coding = instructionCoding,
Type = instruction.Type,
OpCode = instruction.OpCode
};
}
// Reload the other bytes if required!
if (instruction.InstructionLength == 4)
{
// Read the complete 32 Bit instruction set for the decoding
var inst32Coding = Memory.GetWord(pc);
var payload = typeDecoder.DecodeType(instruction, inst32Coding);
if (payload == null)
{
throw new RiscVSimException("No Payload available!");
}
// For UnitTesting: Add the result to the list
InstructionPayloads.Add(payload);
// Execute the command
cpu.Execute(instruction, payload);
}
// Done. Next run.
pc = Register.ReadUnsignedInt(Register.ProgramCounter);
instructionCoding = Memory.GetHalfWord(pc);
}
}
