public static Operand Parse(BytecodeReader reader, OpcodeType parentType)
{
uint token0 = reader.ReadUInt32();
if (token0 == 0)
{
return(null);
}
var operand = new Operand(parentType);
var numComponents = token0.DecodeValue <OperandNumComponents>(0, 1);
switch (numComponents)
{
case OperandNumComponents.Zero:
{
operand.NumComponents = 0;
break;
}
case OperandNumComponents.One:
{
operand.NumComponents = 1;
break;
}
case OperandNumComponents.Four:
{
operand.NumComponents = 4;
operand.SelectionMode = token0.DecodeValue <Operand4ComponentSelectionMode>(2, 3);
switch (operand.SelectionMode)
{
case Operand4ComponentSelectionMode.Mask:
{
operand.ComponentMask = token0.DecodeValue <ComponentMask>(4, 7);
break;
}
case Operand4ComponentSelectionMode.Swizzle:
{
var swizzle = token0.DecodeValue(4, 11);
Func <uint, byte, Operand4ComponentName> swizzleDecoder = (s, i) =>
(Operand4ComponentName)((s >> (i * 2)) & 3);
operand.Swizzles[0] = swizzleDecoder(swizzle, 0);
operand.Swizzles[1] = swizzleDecoder(swizzle, 1);
operand.Swizzles[2] = swizzleDecoder(swizzle, 2);
operand.Swizzles[3] = swizzleDecoder(swizzle, 3);
break;
}
case Operand4ComponentSelectionMode.Select1:
{
var swizzle = token0.DecodeValue <Operand4ComponentName>(4, 5);
operand.Swizzles[0] = operand.Swizzles[1] = operand.Swizzles[2] = operand.Swizzles[3] = swizzle;
break;
}
default:
{
throw new ParseException("Unrecognized selection method: " + operand.SelectionMode);
}
}
break;
}
case OperandNumComponents.N:
{
throw new ParseException("OperandNumComponents.N is not currently supported.");
}
}
operand.OperandType = token0.DecodeValue <OperandType>(12, 19);
operand.IndexDimension = token0.DecodeValue <OperandIndexDimension>(20, 21);
operand.IsExtended = token0.DecodeValue(31, 31) == 1;
if (operand.IsExtended)
{
ReadExtendedOperand(operand, reader);
}
Func <uint, byte, OperandIndexRepresentation> indexRepresentationDecoder = (t, i) =>
(OperandIndexRepresentation)t.DecodeValue((byte)(22 + (i * 3)), (byte)(22 + (i * 3) + 2));
for (byte i = 0; i < (byte)operand.IndexDimension; i++)
{
operand.Indices[i] = new OperandIndex();
var indexRepresentation = indexRepresentationDecoder(token0, i);
operand.Indices[i].Representation = indexRepresentation;
switch (indexRepresentation)
{
case OperandIndexRepresentation.Immediate32:
operand.Indices[i].Value = reader.ReadUInt32();
break;
case OperandIndexRepresentation.Immediate64:
operand.Indices[i].Value = reader.ReadUInt64();
goto default;
case OperandIndexRepresentation.Relative:
operand.Indices[i].Register = Parse(reader, parentType);
break;
case OperandIndexRepresentation.Immediate32PlusRelative:
operand.Indices[i].Value = reader.ReadUInt32();
goto case OperandIndexRepresentation.Relative;
case OperandIndexRepresentation.Immediate64PlusRelative:
operand.Indices[i].Value = reader.ReadUInt64();
goto case OperandIndexRepresentation.Relative;
default:
throw new ParseException("Unrecognised index representation: " + indexRepresentation);
}
}
var numberType = parentType.GetNumberType();
switch (operand.OperandType)
{
case OperandType.Immediate32:
{
var immediateValues = new Number4();
for (var i = 0; i < operand.NumComponents; i++)
{
immediateValues.SetNumber(i, Number.Parse(reader));
}
operand.ImmediateValues = immediateValues;
break;
}
case OperandType.Immediate64:
{
var immediateValues = new Number4();
for (var i = 0; i < operand.NumComponents; i++)
{
immediateValues.SetDouble(i, reader.ReadDouble());
}
operand.ImmediateValues = immediateValues;
break;
}
}
return(operand);
}
public override string ToString()
{
switch (OperandType)
{
case OperandType.Immediate32:
case OperandType.Immediate64:
{
string result = (OperandType == OperandType.Immediate64) ? "d(" : "l(";
bool addSpaces = ParentType != OpcodeType.Mov && ParentType != OpcodeType.MovC && ParentType != OpcodeType.StoreStructured;
for (int i = 0; i < NumComponents; i++)
{
var parentType = ParentType.GetNumberType();
result += (OperandType == OperandType.Immediate64)
? ImmediateValues.GetDouble(i).ToString()
: ImmediateValues.GetNumber(i).ToString(parentType);
if (i < NumComponents - 1)
{
result += ",";
if (addSpaces)
{
result += " ";
}
}
}
result += ")";
return(result);
}
case OperandType.Null:
{
return(OperandType.GetDescription());
}
default:
{
string index = string.Empty;
switch (IndexDimension)
{
case OperandIndexDimension._0D:
break;
case OperandIndexDimension._1D:
index = (Indices[0].Representation == OperandIndexRepresentation.Relative ||
Indices[0].Representation == OperandIndexRepresentation.Immediate32PlusRelative ||
!OperandType.RequiresRegisterNumberFor1DIndex())
? string.Format("[{0}]", Indices[0])
: Indices[0].ToString();
break;
case OperandIndexDimension._2D:
index = (Indices[0].Representation == OperandIndexRepresentation.Relative ||
Indices[0].Representation == OperandIndexRepresentation.Immediate32PlusRelative ||
!OperandType.RequiresRegisterNumberFor2DIndex())
? string.Format("[{0}][{1}]", Indices[0], Indices[1])
: string.Format("{0}[{1}]", Indices[0], Indices[1]);
break;
case OperandIndexDimension._3D:
index = ParentType.IsDeclaration()
? string.Format("{0}[{1}:{2}]", Indices[0], Indices[1], Indices[2])
: string.Format("{0}[{1}][{2}]", Indices[0], Indices[1], Indices[2]);
break;
}
string components = string.Empty;
if (ParentType.OpcodeHasSwizzle())
{
switch (SelectionMode)
{
case Operand4ComponentSelectionMode.Mask:
components = ComponentMask.GetDescription();
break;
case Operand4ComponentSelectionMode.Swizzle:
components = Swizzles[0].GetDescription()
+ Swizzles[1].GetDescription()
+ Swizzles[2].GetDescription()
+ Swizzles[3].GetDescription();
break;
case Operand4ComponentSelectionMode.Select1:
components = Swizzles[0].GetDescription();
break;
default:
throw new InvalidOperationException("Unrecognised selection mode: " + SelectionMode);
}
if (!string.IsNullOrEmpty(components))
{
components = "." + components;
}
}
string minPrecision = MinPrecision == OperandMinPrecision.Default ?
string.Empty : $" {MinPrecision.GetDescription()}";
return(Modifier.Wrap(string.Format("{0}{1}{2}{3}", GetOperandDescription(), index, components, minPrecision)));
}
}
}
public static Operand Parse(BytecodeReader reader, OpcodeType parentType)
{
uint token0 = reader.ReadUInt32();
if (token0 == 0)
return null;
var operand = new Operand(parentType);
var numComponents = token0.DecodeValue<OperandNumComponents>(0, 1);
switch (numComponents)
{
case OperandNumComponents.Zero:
{
operand.NumComponents = 0;
break;
}
case OperandNumComponents.One:
{
operand.NumComponents = 1;
break;
}
case OperandNumComponents.Four:
{
operand.NumComponents = 4;
operand.SelectionMode = token0.DecodeValue<Operand4ComponentSelectionMode>(2, 3);
switch (operand.SelectionMode)
{
case Operand4ComponentSelectionMode.Mask:
{
operand.ComponentMask = token0.DecodeValue<ComponentMask>(4, 7);
break;
}
case Operand4ComponentSelectionMode.Swizzle:
{
var swizzle = token0.DecodeValue(4, 11);
Func<uint, byte, Operand4ComponentName> swizzleDecoder = (s, i) =>
(Operand4ComponentName) ((s >> (i * 2)) & 3);
operand.Swizzles[0] = swizzleDecoder(swizzle, 0);
operand.Swizzles[1] = swizzleDecoder(swizzle, 1);
operand.Swizzles[2] = swizzleDecoder(swizzle, 2);
operand.Swizzles[3] = swizzleDecoder(swizzle, 3);
break;
}
case Operand4ComponentSelectionMode.Select1:
{
var swizzle = token0.DecodeValue<Operand4ComponentName>(4, 5);
operand.Swizzles[0] = operand.Swizzles[1] = operand.Swizzles[2] = operand.Swizzles[3] = swizzle;
break;
}
default:
{
throw new ParseException("Unrecognized selection method: " + operand.SelectionMode);
}
}
break;
}
case OperandNumComponents.N:
{
throw new ParseException("OperandNumComponents.N is not currently supported.");
}
}
operand.OperandType = token0.DecodeValue<OperandType>(12, 19);
operand.IndexDimension = token0.DecodeValue<OperandIndexDimension>(20, 21);
operand.IsExtended = token0.DecodeValue(31, 31) == 1;
if (operand.IsExtended)
ReadExtendedOperand(operand, reader);
Func<uint, byte, OperandIndexRepresentation> indexRepresentationDecoder = (t, i) =>
(OperandIndexRepresentation) t.DecodeValue((byte) (22 + (i * 3)), (byte) (22 + (i * 3) + 2));
for (byte i = 0; i < (byte) operand.IndexDimension; i++)
{
operand.Indices[i] = new OperandIndex();
var indexRepresentation = indexRepresentationDecoder(token0, i);
operand.Indices[i].Representation = indexRepresentation;
switch (indexRepresentation)
{
case OperandIndexRepresentation.Immediate32:
operand.Indices[i].Value = reader.ReadUInt32();
break;
case OperandIndexRepresentation.Immediate64:
operand.Indices[i].Value = reader.ReadUInt64();
goto default;
case OperandIndexRepresentation.Relative:
operand.Indices[i].Register = Parse(reader, parentType);
break;
case OperandIndexRepresentation.Immediate32PlusRelative:
operand.Indices[i].Value = reader.ReadUInt32();
goto case OperandIndexRepresentation.Relative;
case OperandIndexRepresentation.Immediate64PlusRelative:
operand.Indices[i].Value = reader.ReadUInt64();
goto case OperandIndexRepresentation.Relative;
default:
throw new ParseException("Unrecognised index representation: " + indexRepresentation);
}
}
var numberType = parentType.GetNumberType();
switch (operand.OperandType)
{
case OperandType.Immediate32:
{
var immediateValues = new Number4();
for (var i = 0; i < operand.NumComponents; i++)
immediateValues.SetNumber(i, Number.Parse(reader));
operand.ImmediateValues = immediateValues;
break;
}
case OperandType.Immediate64:
{
var immediateValues = new Number4();
for (var i = 0; i < operand.NumComponents; i++)
immediateValues.SetDouble(i, reader.ReadDouble());
operand.ImmediateValues = immediateValues;
break;
}
}
return operand;
}
