/// <summary>
/// Checks to see if the junk alignment directive is compatible with the actual
/// address. This is used to screen out alignment values that no longer match up
/// with the actual addresses.
/// </summary>
/// <param name="offset">File offset of directive.</param>
/// <param name="dfd">Format descriptor.</param>
/// <param name="addrMap">Offset to address map.</param>
/// <returns>True if the .junk alignment directive is correct, false if it's
/// incorrect or not an alignment sub-type (e.g. None).</returns>
public static bool CheckJunkAlign(int offset, FormatDescriptor dfd,
CommonUtil.AddressMap addrMap)
{
Debug.Assert(dfd.FormatType == FormatDescriptor.Type.Junk);
if (dfd.FormatSubType == FormatDescriptor.SubType.None)
{
return(false);
}
Debug.Assert(dfd.IsAlignedJunk);
// Just check the address. Shouldn't need to check the length.
int lastOffset = offset + dfd.Length - 1;
int alignToAddr = addrMap.OffsetToAddress(lastOffset) + 1;
int alignPwr = FormatDescriptor.AlignmentToPower(dfd.FormatSubType);
int alignMask = (1 << alignPwr) - 1;
bool result = (alignToAddr & alignMask) == 0;
//Debug.WriteLine(dfd.FormatSubType + " at +" + offset.ToString("x6") +
// "(" + alignToAddr.ToString("x4") + "): " + result);
return(result);
}
// IGenerator
public void OutputDataOp(int offset)
{
Formatter formatter = SourceFormatter;
byte[] data = Project.FileData;
Anattrib attr = Project.GetAnattrib(offset);
string labelStr = string.Empty;
if (attr.Symbol != null)
{
labelStr = mLocalizer.ConvLabel(attr.Symbol.Label);
}
string commentStr = SourceFormatter.FormatEolComment(Project.Comments[offset]);
string opcodeStr, operandStr;
FormatDescriptor dfd = attr.DataDescriptor;
Debug.Assert(dfd != null);
int length = dfd.Length;
Debug.Assert(length > 0);
bool multiLine = false;
switch (dfd.FormatType)
{
case FormatDescriptor.Type.Default:
if (length != 1)
{
Debug.Assert(false);
length = 1;
}
opcodeStr = sDataOpNames.DefineData1;
int operand = RawData.GetWord(data, offset, length, false);
operandStr = formatter.FormatHexValue(operand, length * 2);
break;
case FormatDescriptor.Type.NumericLE:
opcodeStr = sDataOpNames.GetDefineData(length);
operand = RawData.GetWord(data, offset, length, false);
UpdateCharacterEncoding(dfd);
operandStr = PseudoOp.FormatNumericOperand(formatter, Project.SymbolTable,
mLocalizer.LabelMap, dfd, operand, length,
PseudoOp.FormatNumericOpFlags.OmitLabelPrefixSuffix);
break;
case FormatDescriptor.Type.NumericBE:
opcodeStr = sDataOpNames.GetDefineBigData(length);
if ((string.IsNullOrEmpty(opcodeStr)))
{
// Nothing defined, output as comma-separated single-byte values.
GenerateShortSequence(offset, length, out opcodeStr, out operandStr);
}
else
{
UpdateCharacterEncoding(dfd);
operand = RawData.GetWord(data, offset, length, true);
operandStr = PseudoOp.FormatNumericOperand(formatter, Project.SymbolTable,
mLocalizer.LabelMap, dfd, operand, length,
PseudoOp.FormatNumericOpFlags.OmitLabelPrefixSuffix);
}
break;
case FormatDescriptor.Type.Fill:
opcodeStr = sDataOpNames.Fill;
operandStr = length + "," + formatter.FormatHexValue(data[offset], 2);
break;
case FormatDescriptor.Type.Dense:
multiLine = true;
opcodeStr = operandStr = null;
OutputDenseHex(offset, length, labelStr, commentStr);
break;
case FormatDescriptor.Type.Junk:
int fillVal = Helper.CheckRangeHoldsSingleValue(data, offset, length);
if (fillVal >= 0 && GenCommon.CheckJunkAlign(offset, dfd, Project.AddrMap))
{
// .align <expression>[, <fill>]
opcodeStr = sDataOpNames.Align;
int alignVal = 1 << FormatDescriptor.AlignmentToPower(dfd.FormatSubType);
operandStr = alignVal.ToString() +
"," + formatter.FormatHexValue(fillVal, 2);
}
else if (fillVal >= 0)
{
// treat same as Fill
opcodeStr = sDataOpNames.Fill;
operandStr = length + "," + formatter.FormatHexValue(fillVal, 2);
}
else
{
// treat same as Dense
multiLine = true;
opcodeStr = operandStr = null;
OutputDenseHex(offset, length, labelStr, commentStr);
}
break;
case FormatDescriptor.Type.StringGeneric:
case FormatDescriptor.Type.StringReverse:
case FormatDescriptor.Type.StringNullTerm:
case FormatDescriptor.Type.StringL8:
case FormatDescriptor.Type.StringL16:
case FormatDescriptor.Type.StringDci:
multiLine = true;
opcodeStr = operandStr = null;
OutputString(offset, labelStr, commentStr);
break;
default:
opcodeStr = "???";
operandStr = "***";
break;
}
if (!multiLine)
{
opcodeStr = formatter.FormatPseudoOp(opcodeStr);
OutputLine(labelStr, opcodeStr, operandStr, commentStr);
}
}