public void ShouldGenerateRelativeInstructionsWithLabel()
{
string input = @"procedure Test
{
php
backwardBranch:
sec
bvs backwardBranch
lda #$03
bra forwardBranch
tax
tay
forwardBranch:
rts
}
";
ZealCpuDriver driver = new ZealCpuDriver(input.ToMemoryStream());
driver.Parse();
MemoryStream memoryStream = new MemoryStream(32);
CpuCodeGenerator generator = new CpuCodeGenerator(memoryStream);
generator.Instructions = driver.GlobalScope.Children[0].Statements.Where(x => x is CpuInstructionStatement).Select(x => x as CpuInstructionStatement).ToList();
generator.Scope = driver.GlobalScope.Children[0];
generator.Generate();
Assert.Equal(0xFD, memoryStream.GetBuffer()[3]);
Assert.Equal(0x02, memoryStream.GetBuffer()[7]);
}
public void ShouldGenerateAbsoluteInstructionsWithLabel()
{
string input = @"procedure Test
{
php
mainLoop:
jmp mainLoop
}
";
ZealCpuDriver driver = new ZealCpuDriver(input.ToMemoryStream());
driver.Parse();
RomHeader fakeHeader = new RomHeader();
fakeHeader.MapMode = MapMode.LoROM;
fakeHeader.RomSpeed = RomSpeed.SlowROM;
MemoryStream memoryStream = new MemoryStream(32);
CpuCodeGenerator generator = new CpuCodeGenerator(memoryStream);
generator.Instructions = driver.GlobalScope.Children[0].Statements.Where(x => x is CpuInstructionStatement).Select(x => x as CpuInstructionStatement).ToList();
generator.Scope = driver.GlobalScope.Children[0];
generator.Header = fakeHeader;
generator.Generate();
Assert.Equal(0x01, memoryStream.GetBuffer()[2]);
Assert.Equal(0x80, memoryStream.GetBuffer()[3]);
}
public void ShouldGenerateImmediateInstruction(CpuInstructions opcodeEnum, byte finalOpcode, int value)
{
CpuInstructionStatement instruction = new CpuInstructionStatement();
instruction.AddressingMode = CpuAddressingMode.Immediate;
instruction.Opcode = opcodeEnum;
if (value > byte.MaxValue)
{
instruction.Arguments.Add(new NumberInstructionArgument(value, ArgumentSize.Word));
}
else
{
instruction.Arguments.Add(new NumberInstructionArgument(value, ArgumentSize.Byte));
}
List <CpuInstructionStatement> instructions = new List <CpuInstructionStatement>();
instructions.Add(instruction);
MemoryStream memoryStream = new MemoryStream(8);
CpuCodeGenerator generator = new CpuCodeGenerator(memoryStream);
generator.Instructions = instructions;
generator.Generate();
Assert.Equal(finalOpcode, memoryStream.GetBuffer()[0]);
Assert.Equal((byte)(value & 0xFF), memoryStream.GetBuffer()[1]);
Assert.Equal((byte)(value >> 8), memoryStream.GetBuffer()[2]);
}
public void ShouldGenerateImpliedInstruction(CpuInstructions opcodeEnum, byte finalOpcode)
{
CpuInstructionStatement instruction = new CpuInstructionStatement();
instruction.AddressingMode = CpuAddressingMode.Implied;
instruction.Opcode = opcodeEnum;
List <CpuInstructionStatement> instructions = new List <CpuInstructionStatement>();
instructions.Add(instruction);
MemoryStream memoryStream = new MemoryStream(8);
CpuCodeGenerator generator = new CpuCodeGenerator(memoryStream);
generator.Instructions = instructions;
generator.Generate();
Assert.Equal(finalOpcode, memoryStream.GetBuffer()[0]);
}
static int Main(string[] args)
{
if (args.Length < 1)
{
Console.Error.WriteLine("No source file provided.");
return(1);
}
if (Path.GetExtension(args[0]) != ".zcpu")
{
Console.Error.WriteLine("The source file is in the wrong format. The source file must ends with .zcpu.");
return(1);
}
ZealCpuDriver driver = new ZealCpuDriver(args[0]);
try
{
driver.Parse();
driver.SecondPass();
}
catch (CompilerErrorException)
{
foreach (var error in driver.Errors)
{
printErrorMessage(error);
}
#if DEBUG
Console.Read();
#endif
return(1);
}
FileStream outputRom = new FileStream(Path.ChangeExtension(args[0], ".sfc"), FileMode.Create);
CpuCodeGenerator codeGenerator = new CpuCodeGenerator(outputRom);
codeGenerator.Header = driver.Header;
foreach (var scope in driver.GlobalScope.Children)
{
codeGenerator.Scope = scope;
List <CpuInstructionStatement> instructions = new List <CpuInstructionStatement>();
foreach (var statement in scope.Statements)
{
if (statement is CpuInstructionStatement)
{
instructions.Add((CpuInstructionStatement)statement);
}
}
codeGenerator.Instructions = instructions;
codeGenerator.Generate();
}
SfcRomWriter romWriter = new SfcRomWriter(outputRom);
romWriter.Driver = driver;
romWriter.Write();
outputRom.Close();
using (FileStream newRom = new FileStream(Path.ChangeExtension(args[0], ".sfc"), FileMode.Open))
{
SfcRomWriter checksumWriter = new SfcRomWriter(newRom);
checksumWriter.Driver = driver;
checksumWriter.ComputeChecksum();
}
return(0);
}