+++ /dev/null
-
-
-module ram16_2sum (input clock, input write,
- input [3:0] wr_addr, input [15:0] wr_data,
- input [3:0] rd_addr1, input [3:0] rd_addr2,
- output reg [15:0] sum);
-
- reg signed [15:0] ram_array [0:15];
- reg signed [15:0] a,b;
- wire signed [16:0] sum_int;
-
- always @(posedge clock)
- if(write)
- ram_array[wr_addr] <= #1 wr_data;
-
- always @(posedge clock)
- begin
- a <= #1 ram_array[rd_addr1];
- b <= #1 ram_array[rd_addr2];
- end
-
- assign sum_int = {a[15],a} + {b[15],b};
-
- always @(posedge clock)
- sum <= #1 sum_int[16:1] + (sum_int[16]&sum_int[0]);
-
-endmodule // ram16_2sum