ql-qlf-k4n8-plugin/tests/dffs/dffs.v

module my_dff ( input d, clk, output reg q );
    initial q <= 1'b0;
    always @( posedge clk )
        q <= d;
endmodule

module my_dffr_p ( input d, clk, clr, output reg q );
    initial q <= 1'b0;
    always @( posedge clk or posedge clr )
        if ( clr )
            q <= 1'b0;
        else
            q <= d;
endmodule

module my_dffr_n ( input d, clk, clr, output reg q );
    initial q <= 1'b0;
    always @( posedge clk or negedge clr )
        if ( !clr )
            q <= 1'b0;
        else
            q <= d;
endmodule

module my_dffs_p ( input d, clk, pre, output reg q );
    initial q <= 1'b0;
    always @( posedge clk or posedge pre )
        if ( pre )
            q <= 1'b1;
        else
            q <= d;
endmodule

module my_dffs_n ( input d, clk, pre, output reg q );
    initial q <= 1'b0;
    always @( posedge clk or negedge pre )
        if ( !pre )
            q <= 1'b1;
        else
            q <= d;
endmodule