public override void Interpret(SourceCrawler sourceCrawler, BinaryWriter output, bool isLabelScan)
{
// Eat whitespace to right of mnemonic
sourceCrawler.EatWhitespace();
// Peek to make sure next character is a register delimiter, otherwise we return
if (sourceCrawler.Peek() == CompilerSettings.LiteralDelimiter)
{
// Pass over the register delimiter
sourceCrawler.CurrentNdx++;
// Read the register
byte deviceID = sourceCrawler.ReadByteValue();
// Eat the whitespace leading to next parameter
sourceCrawler.EatWhitespace();
// Peek at the next character, if it is a literal delimiter, we parse a literal, otherwise we parse a register
if (sourceCrawler.Peek() == CompilerSettings.RegisterDelimiter)
{
// Pass over delimiter
sourceCrawler.CurrentNdx++;
// Read hard-coded location
RegisterAddress targetRegister = sourceCrawler.ReadRegister();
// Add the correct size to the assembly length
sourceCrawler.AssemblyLength += (uint)(1 + 1 + 1);
// If this is not a label scanning pass, write to output
if (!isLabelScan)
{
output.Write(ByteCodes[0]); // 0x2E
output.Write(deviceID);
output.Write((byte)targetRegister);
}
}
}
else if (sourceCrawler.Peek() == CompilerSettings.RegisterDelimiter)
{
sourceCrawler.CurrentNdx++;
RegisterAddress sourceRegister = sourceCrawler.ReadRegister();
sourceCrawler.EatWhitespace();
// Peek at the next character, if it is a literal delimiter, we parse a literal, otherwise we parse a register
if (sourceCrawler.Peek() == CompilerSettings.RegisterDelimiter)
{
// Pass over delimiter
sourceCrawler.CurrentNdx++;
// Read hard-coded location
RegisterAddress targetRegister = sourceCrawler.ReadRegister();
// Add the correct size to the assembly length
sourceCrawler.AssemblyLength += (uint)(1 + 1 + 1);
// If this is not a label scanning pass, write to output
if (!isLabelScan)
{
output.Write(ByteCodes[1]); // 0x2E
output.Write((byte)sourceRegister);
output.Write((byte)targetRegister);
}
}
}
}
public override void Interpret(SourceCrawler sourceCrawler, BinaryWriter output, bool isLabelScan)
{
// Eat whitespace to right of mnemonic
sourceCrawler.EatWhitespace();
// Peek to make sure next character is a register delimiter, otherwise we return
if (sourceCrawler.Peek() == CompilerSettings.RegisterDelimiter)
{
// Pass over the register delimiter
sourceCrawler.CurrentNdx++;
// Read the register
RegisterAddress sourceRegister = sourceCrawler.ReadRegister();
// Eat the whitespace leading to next parameter
sourceCrawler.EatWhitespace();
// Peek at the next character, if it is a literal delimiter, we parse a literal, otherwise we parse a register
if (sourceCrawler.Peek() == CompilerSettings.LiteralDelimiter)
{
// Pass over delimiter
sourceCrawler.CurrentNdx++;
// Read hard-coded location
byte deviceId = sourceCrawler.ReadByteValue();
// Add the correct size to the assembly length
sourceCrawler.AssemblyLength += (uint)(1 + 1 + 1);
// If this is not a label scanning pass, write to output
if (!isLabelScan)
{
output.Write(ByteCodes[0]); // 0x32
output.Write((byte)sourceRegister);
output.Write(deviceId);
}
}
// This is not a literal location, check for register
else if (sourceCrawler.Peek() == CompilerSettings.RegisterDelimiter)
{
// Pass over delimiter
sourceCrawler.CurrentNdx++;
// Read register
RegisterAddress destinationRegister = sourceCrawler.ReadRegister();
// This instruction is 3 bytes wide
sourceCrawler.AssemblyLength += (uint)(1 + 1 + 1);
// If this is not a label scanning pass, write to output
if (!isLabelScan)
{
output.Write(ByteCodes[1]); // 0x33
output.Write((byte)sourceRegister);
output.Write((byte)destinationRegister);
}
}
}
// Well it didn't start with a register, so we must be comparing a value
else if (sourceCrawler.Peek() == CompilerSettings.LiteralDelimiter)
{
// Pass over the register delimiter
sourceCrawler.CurrentNdx++;
// Read the value
uint value = sourceCrawler.ReadWordValue();
// Eat the whitespace leading to next parameter
sourceCrawler.EatWhitespace();
// Peek at the next character, if it is a literal delimiter, we parse a literal, otherwise we parse a register
if (sourceCrawler.Peek() == CompilerSettings.LiteralDelimiter)
{
// Pass over delimiter
sourceCrawler.CurrentNdx++;
// Read hard-coded location
byte deviceId = sourceCrawler.ReadByteValue();
// Add the correct size to the assembly length
sourceCrawler.AssemblyLength += (uint)(1 + CompilerSettings.WORD_LENGTH + 1);
// If this is not a label scanning pass, write to output
if (!isLabelScan)
{
output.Write(ByteCodes[2]); // 0x30
output.Write(value);
output.Write(deviceId);
}
}
// This is not a literal location, check for register
else if (sourceCrawler.Peek() == CompilerSettings.RegisterDelimiter)
{
// Pass over delimiter
sourceCrawler.CurrentNdx++;
// Read register
RegisterAddress destinationRegister = sourceCrawler.ReadRegister();
// This instruction is 3 bytes wide
sourceCrawler.AssemblyLength += (uint)(1 + CompilerSettings.WORD_LENGTH + 1);
// If this is not a label scanning pass, write to output
if (!isLabelScan)
{
output.Write(ByteCodes[3]); // 0x31
output.Write(value);
output.Write((byte)destinationRegister);
}
}
}
}