module ringctr4 (iclk,irst,ienb,ostt);
input iclk,irst,ienb;
output[3:0] ostt;
wire[3:0] ostt, qout;
dffepc s0 (iclk,ienb,irst,1'b0,qout[3],qout[0]);
dffepc s1 (iclk,ienb,1'b0,irst,qout[0],qout[1]);
dffepc s2 (iclk,ienb,1'b0,irst,qout[1],qout[2]);
dffepc s3 (iclk,ienb,1'b0,irst,qout[2],qout[3]);
assign ostt = qout;
endmodule