private void ParseHex(string source, RvProgram program)
{
Logger.Info("Hex file coding detected");
/*
* Sample:
*
* 0141a283 # lw
* 0181a303 # lw
* 006282b3 # add
* 04028000 # dout
* 00000000 # halt
* 00000002 # data (2)
* 00000003 # data (3)
*/
string code, comment;
Filter(source, out code, out comment);
// Write Code to the program
//Console.WriteLine("Code = {0}, Comment = {1}", code, comment);
program.AddOpCodeLine(code, comment);
if (code.Length % 2 == 1)
{
throw new ParserException("Hexcoding must be a 2 byte pair");
}
// Read the bytes in big endian order and write in in little endian order
var bytesInBigEndian = FormatHelper.ConvertHexStringToByteArray(code);
var bytesInLittleEndian = bytesInBigEndian.Reverse();
program.AddOpcode(bytesInLittleEndian);
}
private void ParseBinary(string source, RvProgram program, string extension)
{
if (!extension.Equals(".e"))
{
throw new ParserException("Could not read rv format. Please use a valid extension (.hex, .bin,.e) ");
}
/*
* R - Header Start ...
* A 41h .. xx xx xx xx
* S 53h .. xx xx xx xx Starting point
* C - Header End...
*
* block 1
* block 2
* ...
* block n
*
*
*/
using (var binaryStream = File.OpenRead(source))
{
// Read the header first
byte curByte = Convert.ToByte(binaryStream.ReadByte());
var headerBytes = new List <byte>();
if (curByte != 'R')
{
throw new ParserException("Header (R..C) expected!");
}
while (curByte != 'C')
{
//TODO: Read A address (if written)
//TODO: Read S address (if written)
headerBytes.Add(curByte);
curByte = Convert.ToByte(binaryStream.ReadByte());
}
headerBytes.Add(curByte);
var headerLine = BitConverter.ToString(headerBytes.ToArray(), 0);
program.AddHeader(headerLine);
Logger.Debug("Header : {header", headerLine);
// Read Inst32 Byte blocks. Not that efficient, but good for debugging.
var buffer = new byte[4];
while (binaryStream.Read(buffer, 0, buffer.Length) > 0)
{
var codeLine = BitConverter.ToString(buffer, 0);
Logger.Debug("Block {code} detected", codeLine);
program.AddOpCodeLine(codeLine, String.Empty);
// Add the opcode
program.AddOpcode(buffer);
}
}
}
private void ParseBin(string source, RvProgram program)
{
Logger.Info("Bin file coding detected");
/*
* Sample:
* 000000010100 00011 010 00101 0000011 # lw
* 000000011000 00011 010 00110 0000011 # lw
* 0000000 00110 00101 000 00101 0110011 # add
* 0000010 00000 00101 000 00000 0000000 # dout
* 0000000 00000 00000 000 00000 0000000 # halt
* 00000000000000000000000000000010 # data (2)
* 00000000000000000000000000000011 # data (3)
*
*
* 0000 0001 0100 0001 1010 0010 1000 0011 # lw
* 0000 0001 1000 0001 1010 0011 0000 0011 # lw
* 00000000011000101000001010110011 # add
* 00000100000000101000000000000000 # dout
* 00000000000000000000000000000000 # halt
* 00000000000000000000000000000010 # data (2)
* 00000000000000000000000000000011 # data (3)
*/
string code, comment;
Filter(source, out code, out comment);
program.AddOpCodeLine(code, comment);
// Construct the coding now.
uint inst32Coding = 0;
// We start with the LSB ...
var reverseBits = code.Reverse();
int power = 0;
foreach (var bit in reverseBits)
{
// Ignore the spaces..
if (bit != ' ')
{
if (bit == '1')
{
inst32Coding += (uint)(Math.Pow(2, power));
}
// next position
power++;
}
}
// Write the opcode
var inst32Bytes = BitConverter.GetBytes(inst32Coding);
program.AddOpcode(inst32Bytes);
}
public RvProgram Parse(string source)
{
Logger.Info("Parse file {file}", source);
var program = new RvProgram();
ParseContent concreteParse = null;
// Check if not null...
if (source == null)
{
throw new ArgumentNullException("source");
}
// Check if file exists..
var fileExists = File.Exists(source);
if (!fileExists)
{
throw new FileNotFoundException("File " + source + " cannot be found!");
}
try
{
var fi = new FileInfo(source);
var extension = fi.Extension;
bool isText = extension.Equals(".hex") || extension.Equals(".bin");
if (isText)
{
ParseText(source, program, extension);
}
else
{
ParseBinary(source, program, extension);
}
}
catch (Exception ex)
{
Logger.Error(ex, "Exception detected");
throw;
}
return(program);
}
private void ParseText(string source, RvProgram program, string extension)
{
ParseContent concreteParse = null;
if (extension.Equals(".hex"))
{
concreteParse = ParseHex;
}
if (extension.Equals(".bin"))
{
concreteParse = ParseBin;
}
// Something is not as expected.
if (concreteParse == null)
{
throw new ParserException("Could not read rv format. Please use a valid extension (.hex, .bin,.e) ");
}
// *.hex and *.bin are using the text format
// Parse it now..
using (var textStream = File.OpenText(source))
{
// Read each line and convert it to Opcodes
while (!textStream.EndOfStream)
{
var line = textStream.ReadLine();
Logger.Debug("Reading {line}", line);
// Convert
concreteParse(line, program);
}
}
}
