gEDA-user: problems with icarus ..

[Lars Segerlund]

 I am trying to synthesice a simple adder, and I am getting errors like 
this.

 Does anybody know whats going wrong ?

module addc(A, B, CIN, COUT, Q);
        input A, B, CIN;
        output COUT, Q;
        assign Q=A ^ B ^ CIN;
        assign COUT= (A & B) | (A & CIN) | (B & CIN);
endmodule
bash-2.05b$ ../tools/bin/iverilog -S addc.v

 Passes

bash-2.05b$ ../tools/bin/iverilog -tfpga addc.v
UNSUPPORTED LOGIC TYPE: 19
UNSUPPORTED LOGIC TYPE: 19
UNSUPPORTED LOGIC TYPE: 1
UNSUPPORTED LOGIC TYPE: 1
UNSUPPORTED LOGIC TYPE: 1
bash-2.05b$
 Gives the above, the problem is that I cannot make sence of the error 
messages.

 / thanks, Lars Segerlund.