Re: [Iverilog-devel] VVP Performance boots

[Cary R. <cy...@ya...>]

It appears that the writemem* problems are created by the 1<<(6-count). It look like the 1 is being interpreted as a two bit wide value instead of the normal integer 32 bits. This means that for values of count less than five the result is zero. The following simple program is producing incorrect results:

module main;
  reg [2:0] val;

  initial begin
    for (val=0; val<=6; val=val+1) begin
      $displayh(val,, 1<<(6-val));
    end
  end
endmodule

This problem appear to be related to a different patch since this is in the compiler not the runtime. I'm not certain when I last ran the tests with a synced source tree, but I know it was not too long ago.

Cary


      ____________________________________________________________________________________
Be a better friend, newshound, and 
know-it-all with Yahoo! Mobile.  Try it now.  http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ