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xilinx: Add xilinx_dffopt pass (#1557)

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Marcin Kościelnicki 2019-12-18 13:42:26 +01:00
parent aff6ad1ce0
commit a235250403
11 changed files with 638 additions and 27 deletions
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35
techlibs/xilinx/cells_sim.v
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@ -329,6 +329,41 @@ module FDSE (
endcase endgenerate
endmodule
module FDRSE (
output reg Q,
(* clkbuf_sink *)
(* invertible_pin = "IS_C_INVERTED" *)
input C,
(* invertible_pin = "IS_CE_INVERTED" *)
input CE,
(* invertible_pin = "IS_D_INVERTED" *)
input D,
(* invertible_pin = "IS_R_INVERTED" *)
input R,
(* invertible_pin = "IS_S_INVERTED" *)
input S
);
parameter [0:0] INIT = 1'b0;
parameter [0:0] IS_C_INVERTED = 1'b0;
parameter [0:0] IS_CE_INVERTED = 1'b0;
parameter [0:0] IS_D_INVERTED = 1'b0;
parameter [0:0] IS_R_INVERTED = 1'b0;
parameter [0:0] IS_S_INVERTED = 1'b0;
initial Q <= INIT;
wire c = C ^ IS_C_INVERTED;
wire ce = CE ^ IS_CE_INVERTED;
wire d = D ^ IS_D_INVERTED;
wire r = R ^ IS_R_INVERTED;
wire s = S ^ IS_S_INVERTED;
always @(posedge c)
if (r)
Q <= 0;
else if (s)
Q <= 1;
else if (ce)
Q <= d;
endmodule
module FDCE (
(* abc9_arrival=303 *)
output reg Q,