[sdiy] FPGA versus audio DSP

[Rainer Buchty]

>Also big multiply add (like the 56 bit multiply/add units in the
>motorola DSPs) are very very expensive in FPGA 'real estate'.

Well, they were prior to introducing the multiplier blocks. 

Sure, modeling a 56-bit MAC still eats away some space (or takes some
time when doing it serially) when done using 18x18 multipliers and
shifters, but it's nowhere near Spartan-I times where you could easily
fill an entire chip with the multiplier network.

Rainer