uint EvenBitMask = 0x55555555u;
	uint HighIndexBit = PackedIndices >> 1;

	float NumWeight1 = float(countbits(EvenBitMask & ~HighIndexBit & PackedIndices));
	float NumWeight2 = float(countbits(EvenBitMask & HighIndexBit & ~PackedIndices));
	float NumWeight3 = float(countbits(EvenBitMask & HighIndexBit & PackedIndices));

// with NV LOP3: 1 shift, 3 LOP3, 3 pop count, 3 int->float = 10 insns total for 16 pixels
// without: 1 shift, 2 NOT, 5 AND, 3 pop count, 3 int->float = 14 insns total for 16 pixels