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synth_gatemate: Initial implementation

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Signed-off-by: Patrick Urban <patrick.urban@web.de>
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Patrick Urban 2021-09-13 17:16:15 +02:00 • committed by Marcelina Kościelnicka
parent b3e2001e1f
commit 240d289fff
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techlibs/gatemate/mul_map.v Normal file
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/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2021 Cologne Chip AG <support@colognechip.com>
*
* 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.
*
*/
`define MAX(a,b) (a > b ? a : b)
`define MIN(a,b) (a < b ? a : b)
(* techmap_celltype = "$mul $__mul" *)
module \$__MULMXN (A, B, Y);
parameter A_SIGNED = 0;
parameter B_SIGNED = 0;
parameter A_WIDTH = 1;
parameter B_WIDTH = 1;
parameter Y_WIDTH = 1;
(* force_downto *)
input [A_WIDTH-1:0] A;
(* force_downto *)
input [B_WIDTH-1:0] B;
(* force_downto *)
output [Y_WIDTH-1:0] Y;
localparam MAXWIDTH = `MAX(A_WIDTH, B_WIDTH) + ((A_SIGNED || B_SIGNED) ? 0 : 1);
generate
if (A_SIGNED) begin: blkA
wire signed [MAXWIDTH-1:0] Aext = $signed(A);
end
else begin: blkA
wire [MAXWIDTH-1:0] Aext = A;
end
if (B_SIGNED) begin: blkB
wire signed [MAXWIDTH-1:0] Bext = $signed(B);
end
else begin: blkB
wire [MAXWIDTH-1:0] Bext = B;
end
if (A_WIDTH >= B_WIDTH) begin
CC_MULT #(
.A_WIDTH(MAXWIDTH),
.B_WIDTH(MAXWIDTH),
.P_WIDTH(`MIN(Y_WIDTH,MAXWIDTH+MAXWIDTH)),
) _TECHMAP_REPLACE_ (
.A(blkA.Aext),
.B(blkB.Bext),
.P(Y)
);
end
else begin // swap A,B
CC_MULT #(
.A_WIDTH(MAXWIDTH),
.B_WIDTH(MAXWIDTH),
.P_WIDTH(`MIN(Y_WIDTH,MAXWIDTH+MAXWIDTH)),
) _TECHMAP_REPLACE_ (
.A(blkB.Bext),
.B(blkA.Aext),
.P(Y)
);
end
endgenerate
endmodule