void EncodeInstruction(VCDiffInstructionType inst, int size, byte mode = 0)
{
if (lastOpcodeIndex >= 0)
{
int lastOp = instructionAndSizes[lastOpcodeIndex];
if (inst == VCDiffInstructionType.ADD && (table.inst1[lastOp] == CodeTable.A))
{
//warning adding two in a row
Console.WriteLine("Warning: performing two ADD instructions in a row.");
}
int compoundOp = CodeTable.kNoOpcode;
if (size <= byte.MaxValue)
{
compoundOp = instrMap.LookSecondOpcode((byte)lastOp, (byte)inst, (byte)size, mode);
if (compoundOp != CodeTable.kNoOpcode)
{
instructionAndSizes[lastOpcodeIndex] = (byte)compoundOp;
lastOpcodeIndex = -1;
return;
}
}
compoundOp = instrMap.LookSecondOpcode((byte)lastOp, (byte)inst, (byte)0, mode);
if (compoundOp != CodeTable.kNoOpcode)
{
instructionAndSizes[lastOpcodeIndex] = (byte)compoundOp;
//append size to instructionAndSizes
VarIntBE.AppendInt32(size, instructionAndSizes);
lastOpcodeIndex = -1;
}
}
int opcode = CodeTable.kNoOpcode;
if (size <= byte.MaxValue)
{
opcode = instrMap.LookFirstOpcode((byte)inst, (byte)size, mode);
if (opcode != CodeTable.kNoOpcode)
{
instructionAndSizes.Add((byte)opcode);
lastOpcodeIndex = instructionAndSizes.Count - 1;
return;
}
}
opcode = instrMap.LookFirstOpcode((byte)inst, 0, mode);
if (opcode == CodeTable.kNoOpcode)
{
return;
}
instructionAndSizes.Add((byte)opcode);
lastOpcodeIndex = instructionAndSizes.Count - 1;
VarIntBE.AppendInt32(size, instructionAndSizes);
}
private void EncodeInstruction(VCDiffInstructionType inst, int size, byte mode = 0)
{
if (lastOpcodeIndex >= 0)
{
int lastOp = instructionAndSizes.GetBuffer()[lastOpcodeIndex];
int compoundOp;
if (size <= byte.MaxValue)
{
compoundOp = instrMap.LookSecondOpcode((byte)lastOp, (byte)inst, (byte)size, mode);
if (compoundOp != CodeTable.kNoOpcode)
{
instructionAndSizes.GetBuffer()[lastOpcodeIndex] = (byte)compoundOp;
lastOpcodeIndex = -1;
return;
}
}
compoundOp = instrMap.LookSecondOpcode((byte)lastOp, (byte)inst, 0, mode);
if (compoundOp != CodeTable.kNoOpcode)
{
instructionAndSizes.GetBuffer()[lastOpcodeIndex] = (byte)compoundOp;
//append size to instructionAndSizes
VarIntBE.AppendInt32(size, instructionAndSizes);
lastOpcodeIndex = -1;
}
}
int opcode;
if (size <= byte.MaxValue)
{
opcode = instrMap.LookFirstOpcode((byte)inst, (byte)size, mode);
if (opcode != CodeTable.kNoOpcode)
{
instructionAndSizes.WriteByte((byte)opcode);
lastOpcodeIndex = (int)instructionAndSizes.Length - 1;
return;
}
}
opcode = instrMap.LookFirstOpcode((byte)inst, 0, mode);
if (opcode == CodeTable.kNoOpcode)
{
return;
}
instructionAndSizes.WriteByte((byte)opcode);
lastOpcodeIndex = (int)instructionAndSizes.Length - 1;
VarIntBE.AppendInt32(size, instructionAndSizes);
}