Generation of Wallace multiplier in Verilog using Perl

John Bryan

• A Perl script is written to generate unsigned or signed nonrecoded Wallace multiplier Verilog of various size. The final adder is kogge stone.



• There are five input arguments:
  1. Multiplier bit length: Domain is [2,64].
  2. Multiplicand bit length: Domain is [2,64].
  3. u or s: u for unsigned, s for signed
  4. r or d: r for partial random testing with ten thousand random inputs; d for full deterministic testing with all input possibilities tested.
  5. An integer representing, for how many additional input lengths, after the intitial input lengths specified in argument 1 and 2, the script should generate the multiplier code and test. Multiplier and multiplicand bit lengths will alternately increment by 1 from the initial input lengths. Testing is done with Icarus.



• Example commands and corresponding output:
  • perl wallace.pl 33 13 u r 0 generates unsigned Wallace Verilog and corresponding testbench
  • perl wallace.pl 9 7 s d 0 generates signed Wallace Verilog and corresponding testbench.



• Perl implementation.