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
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2012 Claire Xenia Wolf <claire@yosyshq.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.
*
*/
/* TODO: Describe the following mode */
module fa
(input a_c,
input b_c,
input cin_c,
output cout_t,
output sum_x);
wire a_c;
wire b_c;
wire cout_t;
wire cin_c;
wire sum_x;
wire VCC;
assign VCC = 1'b1;
cycloneiv_lcell_comb gen_sum_0 (.combout(sum_x),
.dataa(a_c),
.datab(b_c),
.datac(cin_c),
.datad(VCC));
defparam syn__05_.lut_mask = 16'b1001011010010110;
defparam syn__05_.sum_lutc_input = "datac";
cycloneiv_lcell_comb gen_cout_0 (.combout(cout_t),
.dataa(cin_c),
.datab(b_c),
.datac(a_c),
.datad(VCC));
defparam syn__06_.lut_mask = 16'b1110000011100000;
defparam syn__06_.sum_lutc_input = "datac";
endmodule // fa
module f_stage();
endmodule // f_stage
module f_end();
endmodule // f_end
module _80_cycloneive_alu (A, B, CI, BI, X, Y, CO);
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] X, Y;
input CI, BI;
output [Y_WIDTH:0] CO;
wire _TECHMAP_FAIL_ = Y_WIDTH < 5;
(* force_downto *)
wire [Y_WIDTH-1:0] A_buf, B_buf;
\$pos #(.A_SIGNED(A_SIGNED), .A_WIDTH(A_WIDTH), .Y_WIDTH(Y_WIDTH)) A_conv (.A(A), .Y(A_buf));
\$pos #(.A_SIGNED(B_SIGNED), .A_WIDTH(B_WIDTH), .Y_WIDTH(Y_WIDTH)) B_conv (.A(B), .Y(B_buf));
(* force_downto *)
wire [Y_WIDTH-1:0] AA = A_buf;
(* force_downto *)
wire [Y_WIDTH-1:0] BB = BI ? ~B_buf : B_buf;
wire [Y_WIDTH:0] C = {CO, CI};
fa f0 (.a_c(AA[0]),
.b_c(BB[0]),
.cin_c(C[0]),
.cout_t(C0[1]),
.sum_x(Y[0]));
genvar i;
generate for (i = 1; i < Y_WIDTH; i = i + 1) begin:slice
cycloneive_lcell_comb #(.lut_mask(16'b0101_1010_0101_0000), .sum_lutc_input("cin")) arith_cell (.combout(Y[i]), .cout(CO[i]), .dataa(BB[i]), .datab(1'b1), .datac(1'b1), .datad(1'b1), .cin(C[i]));
end endgenerate
assign X = AA ^ BB;
endmodule
|
