private static void Set(string encoding, InstEmitter emitter, MakeOp makeOp)
{
if (encoding.Length != EncodingBits)
{
throw new ArgumentException(nameof(encoding));
}
int bit = encoding.Length - 1;
int value = 0;
int xMask = 0;
int xBits = 0;
int[] xPos = new int[encoding.Length];
for (int index = 0; index < encoding.Length; index++, bit--)
{
char chr = encoding[index];
if (chr == '1')
{
value |= 1 << bit;
}
else if (chr == 'x')
{
xMask |= 1 << bit;
xPos[xBits++] = bit;
}
}
xMask = ~xMask;
TableEntry entry = new TableEntry(emitter, makeOp, xBits);
for (int index = 0; index < (1 << xBits); index++)
{
value &= xMask;
for (int x = 0; x < xBits; x++)
{
value |= ((index >> x) & 1) << xPos[x];
}
if (_opCodes[value] == null || _opCodes[value].XBits > xBits)
{
_opCodes[value] = entry;
}
}
}
private static OpCode MakeOpCode(InstDescriptor inst, Type type, ulong address, int opCode)
{
MakeOp createInstance = _opActivators.GetOrAdd(type, CacheOpActivator);
return((OpCode)createInstance(inst, address, opCode));
}
public TableEntry(InstEmitter emitter, MakeOp makeOp, int xBits)
{
Emitter = emitter;
MakeOp = makeOp;
XBits = xBits;
}
