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Long Multiplication

Flash multipliers use special wallace tree cells (not lectured) whereas long multiplication using Booth's algorithm is a nice example of a non-fully pipelined multiplier.

Flash multiplier - combinatorial implementation (e.g. a Wallace Tree).

Sequential Long Multiplication

  RA=A
  RB=B
  RC=0
  while(RA>0)
  {
    if odd(RA) RC=RC+RB;
    RA = RA >> 1;
    RB = RB << 1;
  }