private bool OP_ADDU(int i)
{
if (sourceList[i].Length != 4)
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.WRONGARGUNUM, "4");
return false;
}
if (!CheckRegister(sourceList[i][1]) || !CheckRegister(sourceList[i][2]) || !CheckRegister(sourceList[i][3]))
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.WRONGREGNAME);
return false;
}
this.codelist.Add(new Instruction(sourceList[i][0], sourceList[i][1], sourceList[i][2], sourceList[i][3]));
return true;
}
private bool LoadFile()
{
if (sourcepath != null)
{
if (File.Exists(sourcepath) == false)
{
this.error = new AssemblerErrorInfo(0, AssemblerError.NOFILE);
return false;
}
else
{
StreamReader sr = new StreamReader(sourcepath);
string linetext;
for (int i = 0; ; i++)
{
if ((linetext = sr.ReadLine()) == null)
{
break;
}
else
{
sourceString.Add(linetext);
linetext = RemoveComment(linetext);
if (linetext != "")
{
if (linetext.Split(new char[] { ' ', '\t', ',' }, StringSplitOptions.RemoveEmptyEntries).Length != 0)
{
if(Regex.IsMatch(linetext,":")==false)
{
int temp=linetable.Count;
linetable[temp] = i;
codeindextable[i] = temp;
}
sourceList.Add(linetext.Split(new char[] { ' ', '\t', ',' }, StringSplitOptions.RemoveEmptyEntries));
}
}
}
}
sr.Close();
return true;
}
}
else
{
for (int i = 0; i < this.sourceString.Count;i++)
{
if (sourceString[i] != "")
{
if (sourceString[i].Split(new char[] { ' ', '\t', ',' }, StringSplitOptions.RemoveEmptyEntries).Length != 0)
{
linetable[sourceList.Count] = i;
sourceList.Add(sourceString[i].Split(new char[] { ' ', '\t', ',' }, StringSplitOptions.RemoveEmptyEntries));
}
}
}
return true;
}
}
private bool OP_ADDIU(int i)
{
if (sourceList[i].Length != 4)
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.WRONGARGUNUM, "4");
return false;
}
if (!CheckRegister(sourceList[i][1]) || !CheckRegister(sourceList[i][2]))
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.WRONGREGNAME);
return false;
}
int imm = new int();
if (ConvertImmediate(i, sourceList[i][3], out imm, true) == false)
{
return false;
}
else
{
sourceList[i][3] = imm.ToString();
}
this.codelist.Add(new Instruction(sourceList[i][0], sourceList[i][1], sourceList[i][2], sourceList[i][3]));
return true;
}
private bool ConvertImmediate(int i, string str, out int intvalue, bool sign)
{
int maxvalue, minvalue;
if (sign == true)
{
maxvalue = 32767;
minvalue = -32768;
}
else
{
maxvalue = 65535;
minvalue = 0;
}
if (str.ToUpper().StartsWith("0X") == true)
{
try
{
if (sign == true)
{
intvalue = Int16.Parse(str.Substring(2), System.Globalization.NumberStyles.HexNumber);
}
else
{
intvalue = UInt16.Parse(str.Substring(2), System.Globalization.NumberStyles.HexNumber);
}
if (intvalue < minvalue || intvalue > maxvalue)
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.INVALIDIMMEDIATE, str);
return false;
}
}
catch
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.INVALIDIMMEDIATE, str);
intvalue = 0;
return false;
}
}
else if (str.ToUpper().StartsWith("0") == true)
{
if (str == "0")
{
intvalue = 0;
return true;
}
else
{
try
{
intvalue = 0;
str = str.Substring(1);
while (true)
{
intvalue = intvalue * 8 + Convert.ToInt32(str[0]) % 8;
if (str.Length > 1)
{
str = str.Substring(1);
}
else
{
break;
}
}
if (intvalue < minvalue || intvalue > maxvalue)
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.INVALIDIMMEDIATE, str);
return false;
}
}
catch
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.INVALIDIMMEDIATE, str);
intvalue = 0;
return false;
}
}
}
else
{
try
{
intvalue = int.Parse(str);
if (intvalue < minvalue || intvalue > maxvalue)
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.INVALIDIMMEDIATE, str);
return false;
}
}
catch
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.INVALIDIMMEDIATE, str);
intvalue = 0;
return false;
}
}
return true;
}
private bool LoadAddress()
{
for (int i = 0; i < sourceList.Count; i++)
{
if(sourceList[i][0].EndsWith(":"))
{
string label = sourceList[i][0].Substring(0, sourceList[i][0].Length - 1);
if (CheckVariableName(label) == false)
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.INVALIDLABEL, label);
return false;
}
addAddresstable(sourceList[i][0].Substring(0, sourceList[i][0].Length - 1), i);
}
}
return true;
}
public bool DoAssemble()
{
if (this.LoadFile() == false)
{
this.error = new AssemblerErrorInfo(0, AssemblerError.NOFILE);
return false;
}
if (LoadAddress() == false)
{
return false;
}
if (CheckWord() == false)
{
return false;
}
WriteBackAddress();
CalculOffset();
InitInstructionAddress();
AssembleInstructions();
return true;
}
private bool CheckWord()
{
for (int i = 0; i < sourceList.Count; i++)
{
if (addresstable.ContainsValue(i - 1))
{
addresstable[labeltable[i - 1].ToString()] = codelist.Count;
}
if (addresstable.ContainsValue(i)) continue;
switch (sourceList[i][0].ToUpper())
{
case ".GLOBL":
if (sourceList[i].Length != 2)
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.WRONGARGUNUM, "2");
return false;
}
else if (CheckVariableName(sourceList[i][1]) == false)
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.INVALIDLABEL, sourceList[i][1]);
return false;
}
else if (addresstable.ContainsKey(sourceList[i][1].ToString()) == false)
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.ADDNOTFOUND, sourceList[i][1]);
return false;
}
else
{
SetAddress0(sourceList[i][1]);
break;
}
case ".TEXT":
case ".DATA":
case ".WORD":
break;
case "ADD":
if (OP_ADD(i) == false) return false;
break;
case "ADDU":
if (OP_ADDU(i) == false) return false;
break;
case "SUB":
if (OP_SUB(i) == false) return false;
break;
case "SUBU":
if (OP_SUBU(i) == false) return false;
break;
case "AND":
if (OP_AND(i) == false) return false;
break;
case "OR":
if (OP_OR(i) == false) return false;
break;
case "XOR":
if (OP_XOR(i) == false) return false;
break;
case "NOR":
if (OP_NOR(i) == false) return false;
break;
case "SLT":
if (OP_SLT(i) == false) return false;
break;
case "SLTU":
if (OP_SLTU(i) == false) return false;
break;
case "SLL":
if (OP_SLL(i) == false) return false;
break;
case "SRL":
if (OP_SRL(i) == false) return false;
break;
case "SRA":
if (OP_SRA(i) == false) return false;
break;
case "SLLV":
if (OP_SLLV(i) == false) return false;
break;
case "SRLV":
if (OP_SRLV(i) == false) return false;
break;
case "SRAV":
if (OP_SRAV(i) == false) return false;
break;
case "JR":
if (OP_JR(i) == false) return false;
break;
case "JALR":
if (OP_JALR(i) == false) return false;
break;
case "ADDI":
if (OP_ADDI(i) == false) return false;
break;
case "ADDIU":
if (OP_ADDIU(i) == false) return false;
break;
case "ANDI":
if (OP_ANDI(i) == false) return false;
break;
case "ORI":
if (OP_ORI(i) == false) return false;
break;
case "XORI":
if (OP_XORI(i) == false) return false;
break;
case "LUI":
if (OP_LUI(i) == false) return false;
break;
case "SLTI":
if (OP_SLTI(i) == false) return false;
break;
case "SLTIU":
if (OP_SLTIU(i) == false) return false;
break;
case "LW":
if (OP_LW(i) == false) return false;
break;
case "SW":
if (OP_SW(i) == false) return false;
break;
case "LB":
if (OP_LB(i) == false) return false;
break;
case "LBU":
if ( OP_LBU(i) == false) return false;
break;
case "LH":
if (OP_LH(i) == false) return false;
break;
case "LHU":
if (OP_LHU(i) == false) return false;
break;
case "SB":
if (OP_SB(i) == false) return false;
break;
case "SH":
if (OP_SH(i) == false) return false;
break;
case "BEQ":
if (OP_BEQ(i) == false) return false;
break;
case "BNE":
if (OP_BNE(i) == false) return false;
break;
case "BGEZ":
if (OP_BGEZ(i) == false) return false;
break;
case "BGEZAL":
if (OP_BGEZAL(i) == false) return false;
break;
case "BGTZ":
if (OP_BGTZ(i) == false) return false;
break;
case "BLEZ":
if (OP_BLEZ(i) == false) return false;
break;
case "BLTZ":
if (OP_BLTZ(i) == false) return false;
break;
case "BLTZAL":
if (OP_BLTZAL(i) == false) return false;
break;
case "J":
if (OP_J(i) == false) return false;
break;
case "JAL":
if (OP_JAL(i) == false) return false;
break;
case "SUBI":
if (OP_SUBI(i) == false) return false;
break;
case "MOVE":
if (OP_MOVE(i) == false) return false;
break;
case "NOP":
if (OP_NOP(i) == false) return false;
break;
case "LI":
if (OP_LI(i) == false) return false;
break;
case "LA":
if (OP_LA(i) == false) return false;
break;
case "SYSCALL":
if (OP_SYSCALL(i) == false) return false;
break;
case "DIV":
if (OP_DIV(i) == false) return false;
break;
case "DIVU":
if (OP_DIVU(i) == false) return false;
break;
case "MULT":
if (OP_MULT(i) == false) return false;
break;
case "MULTU":
if (OP_MULTU(i) == false) return false;
break;
case "BREAK":
if (OP_BREAK(i) == false) return false;
break;
case "ERET":
if (OP_ERET(i) == false) return false;
break;
case "MFHI":
if (OP_MFHI(i) == false) return false;
break;
case "MFLO":
if (OP_MFLO(i) == false) return false;
break;
case "MTHI":
if (OP_MTHI(i) == false) return false;
break;
case "MTLO":
if (OP_MTLO(i) == false) return false;
break;
case "MFC0":
if (OP_MFC0(i) == false) return false;
break;
case "MTC0":
if (OP_MTC0(i) == false) return false;
break;
default:
if (sourceList[i].Length == 1 && sourceList[i][0] == string.Empty)
break;
else
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.UNKNOWNCMD, sourceList[i][0]);
return false;
}
}
}
return true;
}
private bool OP_SYSCALL(int i)
{
if (sourceList[i].Length != 1)
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.WRONGARGUNUM, "1");
return false;
}
this.codelist.Add(new Instruction(sourceList[i][0], string.Empty, string.Empty, string.Empty));
return true;
}
private bool OP_SW(int i)
{
if (sourceList[i].Length != 3)
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.WRONGARGUNUM, "3");
return false;
}
if (!CheckRegister(sourceList[i][1]))
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.WRONGREGNAME);
return false;
}
string[] SubArg = sourceList[i][2].Split(new Char[] { '(', ')' }, StringSplitOptions.RemoveEmptyEntries);
if (SubArg.Length != 2)
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.WRONGARG, this.sourceList[i][2]);
return false;
}
else
{
sourceList[i] = new string[] { sourceList[i][0], sourceList[i][1], SubArg[1], SubArg[0] };
if (!CheckRegister(sourceList[i][2]))
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.INVALIDLABEL, this.sourceList[i][2]);
return false;
}
int imm = new int();
if (ConvertImmediate(i, sourceList[i][3], out imm, true) == false)
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.WRONGOFFSET, this.sourceList[i][3]);
return false;
}
this.codelist.Add(new Instruction(sourceList[i][0], sourceList[i][1], sourceList[i][2], imm.ToString()));
return true;
}
}
private bool OP_MTLO(int i)
{
if (sourceList[i].Length != 2)
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.WRONGARGUNUM, "2");
return false;
}
if (!CheckRegister(sourceList[i][1]))
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.WRONGREGNAME);
return false;
}
this.codelist.Add(new Instruction(sourceList[i][0], sourceList[i][1], string.Empty, string.Empty));
return true;
}
private bool OP_JAL(int i)
{
if (sourceList[i].Length != 2)
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.WRONGARGUNUM, "2");
return false;
}
if (CheckAddress(sourceList[i][1]) == false)
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.ADDNOTFOUND, sourceList[i][1]);
return false;
}
this.codelist.Add(new Instruction(sourceList[i][0], sourceList[i][1], string.Empty, string.Empty));
return true;
}
private bool OP_BLTZAL(int i)
{
if (sourceList[i].Length != 3)
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.WRONGARGUNUM, "3");
return false;
}
if (!CheckRegister(sourceList[i][1]))
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.WRONGREGNAME);
return false;
}
if (CheckAddress(sourceList[i][3]) == false)
{
this.error = new AssemblerErrorInfo((int)codeindextable[i], AssemblerError.ADDNOTFOUND);
return false;
}
this.codelist.Add(new Instruction(sourceList[i][0], sourceList[i][1], sourceList[i][2], sourceList[i][3]));
return true;
}