File size: 1,598 Bytes
f61bac1 | 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 | // SPDX-License-Identifier: BSD-3-Clause
// Copyright (c) 2024, The OpenROAD Authors
module top (
input clk,
input in1,
output out1,
output out2,
output out3,
output out4,
output out5,
output out6
);
wire drvr_out;
wire buf_top1_out;
wire buf_top2_out;
wire buf_mod2_out;
// Level 1: Driver in a hierarchical module
MOD1 mod1_inst (
.clk_in(clk),
.d_in(in1),
.q_out(drvr_out)
);
// Level 2: drvr_out drives 2 top-level buffers and 1 hierarchical buffer
BUF_X1 buf_top1 (.A(drvr_out), .Z(buf_top1_out));
BUF_X1 buf_top2 (.A(drvr_out), .Z(buf_top2_out));
MOD2 mod2_inst (.in(drvr_out), .out(buf_mod2_out));
// Level 3: Loads driven by level 2 buffers
// Loads of buf_top1
BUF_X1 load_top1 (.A(buf_top1_out), .Z(out1));
BUF_X1 load_top2 (.A(buf_top1_out), .Z(out2));
// Loads of buf_top2
BUF_X1 load_top3 (.A(buf_top2_out), .Z(out3));
// Loads of buf_mod2 (from MOD2)
BUF_X1 load_top4 (.A(buf_mod2_out), .Z(out4));
// Hierarchical loads in MOD3
MOD3 mod3_inst (
.in1(buf_top1_out),
.in2(buf_top2_out),
.in3(buf_mod2_out),
.out1(out5),
.out2(out6)
);
endmodule
module MOD1 (input clk_in, input d_in, output q_out);
DFF_X1 drvr (.D(d_in), .CK(clk_in), .Q(q_out));
endmodule
module MOD2 (input in, output out);
BUF_X1 buf_mod2 (.A(in), .Z(out));
endmodule
module MOD3 (input in1, input in2, input in3, output out1, output out2);
BUF_X1 load_mod3_1 (.A(in1), .Z(out1));
BUF_X1 load_mod3_2 (.A(in2), .Z(out2));
BUF_X1 load_mod3_3 (.A(in3)); // This one is not connected to an output
endmodule |