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/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2012 Clifford Wolf <clifford@clifford.at>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
// > c60k28 (Viacheslav, VT) [at] yandex [dot] com
// > Intel FPGA technology mapping. User must first simulate the generated \
// > netlist before going to test it on board.
// Input buffer map
module \$__inpad (input I, output O);
cycloneive_io_ibuf _TECHMAP_REPLACE_ (.o(O), .i(I), .ibar(1'b0));
endmodule
// Output buffer map
module \$__outpad (input I, output O);
cycloneive_io_obuf _TECHMAP_REPLACE_ (.o(O), .i(I), .oe(1'b1));
endmodule
// LUT Map
/* 0 -> datac
1 -> cin */
module \$lut (A, Y);
parameter WIDTH = 0;
parameter LUT = 0;
(* force_downto *)
input [WIDTH-1:0] A;
output Y;
generate
if (WIDTH == 1) begin
assign Y = ~A[0]; // Not need to spend 1 logic cell for such an easy function
end else
if (WIDTH == 2) begin
cycloneive_lcell_comb #(.lut_mask({4{LUT}}),
.sum_lutc_input("datac")) _TECHMAP_REPLACE_ (.combout(Y),
.dataa(A[0]),
.datab(A[1]),
.datac(1'b1),
.datad(1'b1));
end else
if(WIDTH == 3) begin
cycloneive_lcell_comb #(.lut_mask({2{LUT}}),
.sum_lutc_input("datac")) _TECHMAP_REPLACE_ (.combout(Y),
.dataa(A[0]),
.datab(A[1]),
.datac(A[2]),
.datad(1'b1));
end else
if(WIDTH == 4) begin
cycloneive_lcell_comb #(.lut_mask(LUT),
.sum_lutc_input("datac")) _TECHMAP_REPLACE_ (.combout(Y),
.dataa(A[0]),
.datab(A[1]),
.datac(A[2]),
.datad(A[3]));
end else
wire _TECHMAP_FAIL_ = 1;
endgenerate
endmodule
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