File: bram2.v

package info (click to toggle)
yosys 0.23-6
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 20,644 kB
  • sloc: cpp: 138,485; python: 8,605; yacc: 3,451; sh: 2,358; makefile: 1,204; lex: 696; perl: 399; ansic: 371; javascript: 323; tcl: 78; vhdl: 46
file content (35 lines) | stat: -rw-r--r-- 621 bytes parent folder | download | duplicates (5)
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
module myram(
	input		  rd_clk,
	input	   [ 7:0] rd_addr,
	output reg [17:0] rd_data,
	input		  wr_clk,
	input		  wr_enable,
	input	   [ 7:0] wr_addr,
	input	   [17:0] wr_data
);
	reg [17:0] memory [0:255];
	integer i;

	function [17:0] hash(input [7:0] k);
		reg [31:0] x;
		begin
			x = {k, ~k, k, ~k};
			x = x ^ (x << 13);
			x = x ^ (x >> 17);
			x = x ^ (x << 5);
			hash = x;
		end
	endfunction

	initial begin
		for (i = 0; i < 256; i = i+1)
			memory[i] = hash(i);
	end

	always @(posedge rd_clk)
		rd_data <= memory[rd_addr];

	always @(posedge wr_clk)
		if (wr_enable)
			memory[wr_addr] <= wr_data;
endmodule