// Accepts 0x[hex] or [dec] format
private uint EncodeImmediate(string strImmed, int length, uint mask)
{
/*
* if ((strImmed.StartsWith("0x")) || (strImmed.StartsWith("-0x")))
* return ASMValueHelper.UnsignedToBinary_WithLength(ASMValueHelper.HexToUnsigned_AnySign(strImmed, length), length);
* else
* return ASMValueHelper.UnsignedToBinaryAny_WithLength(Convert.ToInt32(strImmed), length);
*/
/*
* if ((strImmed.StartsWith("0x")) || (strImmed.StartsWith("-0x")))
* return ASMValueHelper.HexToUnsigned_AnySign(strImmed, length) & mask;
* else
* return ASMValueHelper.SignedToUnsigned(Convert.ToInt32(strImmed)) & mask;
*/
return(ValueHelper.GetAnyUnsignedValue(strImmed) & mask);
}
// Translates a single pseudoinstruction
public EncodeLine[] TranslatePseudoSingle(EncodingFormat encoding, string[] parts, int index, uint pc, bool skipLabelAssertion = false)
{
List <EncodeLine> result = new List <EncodeLine>();
int startParenIndex = 0;
int endParenIndex = 0;
string strImmed = "";
string[] newParts;
uint ivalue = 0;
//long lvalue = 0;
ushort ushortval = 0;
//short shortval = 0;
bool useNegativeOffset = false;
string regS = "";
int argIndex0 = 0;
int argIndex1 = 0;
bool doesBranchIfEqual = false;
bool isStore = false;
bool useAT = false;
// Find args
string strArgs = "";
string[] args = null;
if (!string.IsNullOrEmpty(parts[1]))
{
strArgs = ASMStringHelper.RemoveSpaces(parts[1]);
args = strArgs.Split(',');
}
switch (encoding.Command)
{
case "jalr":
if (args.Length == 1)
{
//parts[1] = args[0] + ",ra";
parts[1] = "ra," + args[0];
}
result.Add(new EncodeLine(parts, index));
break;
case "mul":
case "div":
case "rem":
case "mod":
if ((encoding.Command == "div") && (args.Length < 3))
{
result.Add(new EncodeLine(parts, index));
break;
}
newParts = new string[2];
newParts[0] = (encoding.Command == "mul") ? "mult" : "div";
newParts[1] = args[1] + "," + args[2];
result.Add(new EncodeLine(newParts, index));
parts[0] = ((encoding.Command == "mul") || (encoding.Command == "div")) ? "mflo" : "mfhi";
parts[1] = args[0];
result.Add(new EncodeLine(parts, index));
break;
case "add":
case "addu":
case "and":
case "min":
case "max":
case "nor":
case "or":
case "rotrv":
case "sllv":
case "slt":
case "sltu":
case "srav":
case "srlv":
case "sub":
case "subu":
case "xor":
if (args.Length == 2)
{
parts[1] = args[0] + "," + parts[1];
}
result.Add(new EncodeLine(parts, index));
break;
case "addi":
case "addiu":
case "andi":
case "ori":
case "rotr":
case "sll":
case "slti":
case "sltiu":
case "sra":
case "srl":
case "xori":
if (args.Length == 2)
{
parts[1] = args[0] + "," + parts[1];
}
result.Add(new EncodeLine(parts, index));
break;
case "bgt":
case "blt":
case "bge":
case "ble":
argIndex0 = ((encoding.Command == "bgt") || (encoding.Command == "ble")) ? 1 : 0;
argIndex1 = (argIndex0 > 0) ? 0 : 1;
doesBranchIfEqual = ((encoding.Command == "bge") || (encoding.Command == "ble"));
newParts = new string[2];
newParts[0] = "slt";
newParts[1] = "at," + args[argIndex0] + "," + args[argIndex1];
result.Add(new EncodeLine(newParts, index));
parts[0] = doesBranchIfEqual ? "beq" : "bne";
parts[1] = "at,zero," + args[2];
result.Add(new EncodeLine(parts, index));
break;
case "lbu":
case "lb":
case "lhu":
case "lh":
case "lw":
case "sb":
case "sh":
case "sw":
bool isHiLo = ((args[1].ToLower().StartsWith("%hi")) || (args[1].ToLower().StartsWith("%lo")));
startParenIndex = args[1].IndexOf('(', (isHiLo ? 4 : 0)); // check -1
endParenIndex = args[1].IndexOf(')', (startParenIndex >= 0) ? startParenIndex : 0);
isStore = encoding.Command.ToLower().StartsWith("s");
useAT = ((startParenIndex >= 0) || (isStore));
if (startParenIndex >= 0)
{
regS = args[1].Substring(startParenIndex + 1, endParenIndex - startParenIndex - 1);
strImmed = args[1].Substring(0, startParenIndex);
}
else
{
strImmed = args[1];
}
ivalue = ValueHelper.GetAnyUnsignedValue(strImmed, skipLabelAssertion);
bool isLabel = !(
((strImmed.StartsWith("0x")) || (strImmed.StartsWith("-0x"))) ||
(ASMStringHelper.StringIsNumeric(strImmed)) ||
((strImmed.StartsWith("-")) && (strImmed.Length > 1)) ||
(isHiLo)
);
if (((ivalue > 0x7fff) && (strImmed[0] != '-') && (!isHiLo)) || isLabel)
{
ushortval = (ushort)(ivalue & 0xffff);
if (ushortval >= 0x8000)
{
useNegativeOffset = true;
ushortval = (ushort)(0x10000 - ushortval);
}
newParts = new string[2];
newParts[0] = "lui";
newParts[1] = (useAT ? "at" : args[0]) + "," + ((ivalue >> 16) + (useNegativeOffset ? 1 : 0));
result.Add(new EncodeLine(newParts, index));
if (startParenIndex >= 0)
{
newParts = new string[2];
newParts[0] = "addu";
newParts[1] = "at,at," + regS;
result.Add(new EncodeLine(newParts, index));
}
parts[1] = args[0] + "," + (useNegativeOffset ? "-" : "") + ushortval + "(" + (useAT ? "at" : args[0]) + ")";
result.Add(new EncodeLine(parts, index));
}
else
{
result.Add(new EncodeLine(parts, index));
}
break;
// "la" always translates to two instructions, while "li" can translate to one.
case "la":
case "li":
//ivalue = ValueHelper.GetAnyUnsignedValue(args[1]);
/*
* try
* {
* ivalue = ValueHelper.GetAnyUnsignedValue(args[1]);
* //ivalue = ValueHelper.FindUnsignedValue(args[1]);
* }
* catch
* {
* ivalue = 0;
* }
*/
ivalue = ValueHelper.GetAnyUnsignedValue(args[1], skipLabelAssertion);
bool isLA = encoding.Command.Equals("la");
if (ivalue >= 0xffff8000)
{
parts[0] = "addiu";
parts[1] = args[0] + ",zero," + ((ushort)(ivalue & 0xffff));
result.Add(new EncodeLine(parts, index));
}
else if ((ivalue > 0xffff) || isLA)
{
newParts = new string[2];
newParts[0] = "lui";
newParts[1] = args[0] + "," + (ivalue >> 16);
result.Add(new EncodeLine(newParts, index));
ushortval = (ushort)(ivalue & 0xffff);
if ((ushortval > 0) || (isLA))
{
parts[0] = "ori";
parts[1] = args[0] + "," + args[0] + "," + ushortval;
result.Add(new EncodeLine(parts, index));
}
}
else
{
if (!((args[1].StartsWith("0x") || ASMStringHelper.StringIsNumeric(args[1]))))
{
parts[1] = args[0] + "," + ValueHelper.LabelHelper.LabelToUnsigned(args[1], skipLabelAssertion);
}
result.Add(new EncodeLine(parts, index));
}
break;
default:
result.Add(new EncodeLine(parts, index));
break;
}
return(result.ToArray());
}
