yosys/techlibs/machxo2/cells_map.v

module \$lut (A, Y);
	parameter WIDTH = 0;
	parameter LUT = 0;
	input [WIDTH-1:0] A;
	output Y;

	localparam rep = 1<<(4-WIDTH);
	wire [3:0] I;

	generate
		if(WIDTH == 1) begin
			assign I = {1'b0, 1'b0, 1'b0, A[0]};
		end else if(WIDTH == 2) begin
			assign I = {1'b0, 1'b0, A[1], A[0]};
		end else if(WIDTH == 3) begin
			assign I = {1'b0, A[2], A[1], A[0]};
		end else if(WIDTH == 4) begin
			assign I = {A[3], A[2], A[1], A[0]};
		end else begin
			wire _TECHMAP_FAIL_ = 1;
		end
	endgenerate

	LUT4 #(.INIT({rep{LUT}})) _TECHMAP_REPLACE_ (.A(I[0]), .B(I[1]), .C(I[2]), .D(I[3]), .Z(Y));
endmodule

// DFFs
module  \$_DFF_P_ (input D, C, output Q); FACADE_FF #(.CEMUX("1"), .CLKMUX("CLK"), .LSRMUX("LSR"), .REGSET("RESET")) _TECHMAP_REPLACE_ (.CLK(C), .LSR(1'b0), .DI(D), .Q(Q)); endmodule

// IO- "$__" cells for the iopadmap pass.
module  \$__FACADE_OUTPAD (input I, output O); FACADE_IO #(.DIR("OUTPUT")) _TECHMAP_REPLACE_ (.PAD(O), .I(I), .EN(1'b1)); endmodule
module  \$__FACADE_INPAD (input I, output O); FACADE_IO #(.DIR("INPUT")) _TECHMAP_REPLACE_ (.PAD(I), .O(O)); endmodule
module  \$__FACADE_TOUTPAD (input I, OE, output O); FACADE_IO #(.DIR("OUTPUT")) _TECHMAP_REPLACE_ (.PAD(O), .I(I), .EN(OE)); endmodule
module  \$__FACADE_TINOUTPAD (input I, OE, output O, inout B); FACADE_IO #(.DIR("BIDIR")) _TECHMAP_REPLACE_ (.PAD(B), .I(I), .O(O), .EN(OE)); endmodule