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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);
cyclonev_io_ibuf _TECHMAP_REPLACE_ (.o(O), .i(I), .ibar(1'b0));
endmodule
// Output buffer map
module \$__outpad (input I, output O);
cyclonev_io_obuf _TECHMAP_REPLACE_ (.o(O), .i(I), .oe(1'b1));
endmodule
// LUT Map
module \$lut (A, Y);
parameter WIDTH = 0;
parameter LUT = 0;
(* force_downto *)
input [WIDTH-1:0] A;
output Y;
wire VCC;
wire GND;
assign {VCC,GND} = {1'b1,1'b0};
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
cyclonev_lcell_comb #(.lut_mask({16{LUT}}), .shared_arith("off"), .extended_lut("off"))
_TECHMAP_REPLACE_
(.combout(Y),
.dataa(A[0]),
.datab(A[1]),
.datac(VCC),
.datad(VCC),
.datae(VCC),
.dataf(VCC),
.datag(VCC));
end
else
if(WIDTH == 3) begin
cyclonev_lcell_comb #(.lut_mask({8{LUT}}), .shared_arith("off"), .extended_lut("off"))
_TECHMAP_REPLACE_
(.combout(Y),
.dataa(A[0]),
.datab(A[1]),
.datac(A[2]),
.datad(VCC),
.datae(VCC),
.dataf(VCC),
.datag(VCC));
end
else
if(WIDTH == 4) begin
cyclonev_lcell_comb #(.lut_mask({4{LUT}}), .shared_arith("off"), .extended_lut("off"))
_TECHMAP_REPLACE_
(.combout(Y),
.dataa(A[0]),
.datab(A[1]),
.datac(A[2]),
.datad(A[3]),
.datae(VCC),
.dataf(VCC),
.datag(VCC));
end
else
if(WIDTH == 5) begin
cyclonev_lcell_comb #(.lut_mask({2{LUT}}), .shared_arith("off"), .extended_lut("off"))
_TECHMAP_REPLACE_
(.combout(Y),
.dataa(A[0]),
.datab(A[1]),
.datac(A[2]),
.datad(A[3]),
.datae(A[4]),
.dataf(VCC),
.datag(VCC));
end
else
if(WIDTH == 6) begin
cyclonev_lcell_comb #(.lut_mask(LUT), .shared_arith("off"), .extended_lut("off"))
_TECHMAP_REPLACE_
(.combout(Y),
.dataa(A[0]),
.datab(A[1]),
.datac(A[2]),
.datad(A[3]),
.datae(A[4]),
.dataf(A[5]),
.datag(VCC));
end
/*else
if(WIDTH == 7) begin
TODO: There's not a just 7-input function on Cyclone V, see the following note:
**Extended LUT Mode**
Use extended LUT mode to implement a specific set of 7-input functions. The set must
be a 2-to-1 multiplexer fed by two arbitrary 5-input functions sharing four inputs.
[source](Device Interfaces and Integration Basics for Cyclone V Devices).
end*/
else
wire _TECHMAP_FAIL_ = 1;
endgenerate
endmodule // lut
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