1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
/*
* 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 A_MAXWIDTH = A_WIDTH + (A_SIGNED ? 0 : 1);
localparam B_MAXWIDTH = B_WIDTH + (B_SIGNED ? 0 : 1);
generate
if (A_SIGNED) begin: blkA
wire signed [A_MAXWIDTH-1:0] Aext = $signed(A);
end
else begin: blkA
wire [A_MAXWIDTH-1:0] Aext = A;
end
if (B_SIGNED) begin: blkB
wire signed [B_MAXWIDTH-1:0] Bext = $signed(B);
end
else begin: blkB
wire [B_MAXWIDTH-1:0] Bext = B;
end
if (A_WIDTH >= B_WIDTH) begin
CC_MULT #(
.A_WIDTH(A_MAXWIDTH),
.B_WIDTH(B_MAXWIDTH),
.P_WIDTH(Y_WIDTH),
) _TECHMAP_REPLACE_ (
.A(blkA.Aext),
.B(blkB.Bext),
.P(Y)
);
end
else begin // swap A,B
CC_MULT #(
.A_WIDTH(A_MAXWIDTH),
.B_WIDTH(B_MAXWIDTH),
.P_WIDTH(Y_WIDTH),
) _TECHMAP_REPLACE_ (
.A(blkB.Bext),
.B(blkA.Aext),
.P(Y)
);
end
endgenerate
endmodule
|
