Looking back at the code - the vector concatenation thing on the left hand side in the assignment statementĬould be replaced by two assignment statements ( looking at the table in the top of the page and writing sum of products.Īssign A = ((~cin) & x &(~y)) | ((~cin) &(~x)&y ) | (cin &(~x) &(~y)) | (cin & x & y) Īssign cout = ((~cin) & x &y) | ((cin) &(~x)&y ) | (cin &(x) &(~y)) | (cin & x & y) The system variable $time returns the current simulation time as a 64-bit integer. This comes handy when looking at the data ( if that is not in graph).
Notice that we have introduced a system variable $time as one of the parameters in the $monitor statement.
As usual we will compile the program with following commandsĬ:\iverilog -o output fulladder.v fulladdertb.v
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