/// <summary>
/// Instruction mapping for op codes and such for using in encoding
/// </summary>
public InstructionMap()
{
table = CodeTable.DefaultTable;
firstMap = new OpcodeMap((int)VCDiffInstructionType.LAST + AddressCache.DefaultLast + 1, FindMaxSize(table.size1));
secondMap = new OpcodeMap2((int)VCDiffInstructionType.LAST + AddressCache.DefaultLast + 1, FindMaxSize(table.size2));
for (int opcode = 0; opcode < CodeTable.kCodeTableSize; ++opcode)
{
if (table.inst2[opcode] == CodeTable.N)
{
firstMap.Add(table.inst1[opcode], table.size1[opcode], table.mode1[opcode], (byte)opcode);
}
else if (table.inst1[opcode] == CodeTable.N)
{
firstMap.Add(table.inst1[opcode], table.size1[opcode], table.mode1[opcode], (byte)opcode);
}
}
for (int opcode = 0; opcode < CodeTable.kCodeTableSize; ++opcode)
{
if ((table.inst1[opcode] != CodeTable.N) && (table.inst2[opcode] != CodeTable.N))
{
int found = LookFirstOpcode(table.inst1[opcode], table.size1[opcode], table.mode1[opcode]);
if (found == CodeTable.kNoOpcode)
{
continue;
}
secondMap.Add((byte)found, table.inst2[opcode], table.size2[opcode], table.mode2[opcode], (byte)opcode);
}
}
}
/// <summary>
/// Instruction mapping for op codes and such for using in encoding
/// </summary>
public unsafe InstructionMap()
{
table = CodeTable.DefaultTable;
var inst2 = table.inst2;
var inst1 = table.inst1;
var size2 = table.size2;
var size1 = table.size1;
var mode1 = table.mode1;
var mode2 = table.mode2;
// max sizes are known for the default code table (18 and 6 respectively).
firstMap = new OpcodeMap((int)VCDiffInstructionType.LAST + AddressCache.DefaultLast + 1, FindMaxSize(size1.AsSpan(), 18));
secondMap = new OpcodeMap2((int)VCDiffInstructionType.LAST + AddressCache.DefaultLast + 1, FindMaxSize(size2.AsSpan(), 6));
for (int opcode = 0; opcode < CodeTable.kCodeTableSize; ++opcode)
{
if (inst2.Pointer[opcode] == CodeTable.N)
{
firstMap.Add(inst1.Pointer[opcode], size1.Pointer[opcode], mode1.Pointer[opcode], (byte)opcode);
}
else if (inst1.Pointer[opcode] == CodeTable.N)
{
firstMap.Add(inst1.Pointer[opcode], size1.Pointer[opcode], mode1.Pointer[opcode], (byte)opcode);
}
}
for (int opcode = 0; opcode < CodeTable.kCodeTableSize; ++opcode)
{
if ((inst1.Pointer[opcode] != CodeTable.N) && (inst2.Pointer[opcode] != CodeTable.N))
{
int found = LookFirstOpcode(inst1.Pointer[opcode], size1.Pointer[opcode], mode1.Pointer[opcode]);
if (found == CodeTable.kNoOpcode)
{
continue;
}
secondMap.Add((byte)found, inst2.Pointer[opcode], size2.Pointer[opcode], mode2.Pointer[opcode], (byte)opcode);
}
}
}
