Constant Multiplier by LUT

Agree with you! (I was hasty to compare with Chapman algo because that algo is simple and it gives less resource consumption <in theory>)

But is there a quick way to predict size/speed of a filter?

+One more question:

I've tried a couple of designs and the observation is that:

The size of my Multiplier in my DSP circuit is much smaller than (~1/2) size of that multiplier when i synthesize the multiplier alone, separately. (they are multipliers with same constant value, same input/output bitwidth).

Do you have any idea why? (I guess it's related to logic optimizations).:confused:

Thanks a lot

Jeff