+module GP_DFFR(input D, CLK, nRST, output reg Q);
+ parameter [0:0] INIT = 1'bx;
+ initial Q = INIT;
+ always @(posedge CLK, negedge nRST) begin
+ if (!nRST)
+ Q <= 1'b0;
+ else
+ Q <= D;
+ end
+endmodule
+
+module GP_DFFSR(input D, CLK, nSR, output reg Q);
+ parameter [0:0] INIT = 1'bx;
+ parameter [0:0] SRMODE = 1'bx;
+ initial Q = INIT;
+ always @(posedge CLK, negedge nSR) begin
+ if (!nSR)
+ Q <= SRMODE;
+ else
+ Q <= D;
+ end
+endmodule
+