`timescale 1ns / 1ps | |
module el_adder#( | |
parameter WIDTH = 32, | |
parameter RAIL_NUM = 2, | |
parameter IN_NUM = 3, | |
parameter OUT_NUM = 2 | |
) | |
( | |
//---------CTRL----------------------- | |
input rst, | |
//---------LINK-A-IN------------------ | |
output [WIDTH-1 : 0] ack_a_o, | |
input [RAIL_NUM*WIDTH-1 : 0] in_a, | |
//---------LINK-B-IN------------------ | |
output [WIDTH-1 : 0] ack_b_o, | |
input [RAIL_NUM*WIDTH-1 : 0] in_b, | |
//---------LINK-C-IN------------------ | |
output ack_c_o, | |
input [RAIL_NUM-1 : 0] in_c, | |
//---------LINK-S-OUT----------------- | |
input [WIDTH-1 : 0] ack_s_i, | |
output [RAIL_NUM*WIDTH-1 : 0] out_s, | |
//---------LINK-C-OUT----------------- | |
input ack_c_i, | |
output [RAIL_NUM-1 : 0] out_c | |
//------------------------------------ | |
); | |
genvar pk_idx; | |
genvar unpk_idx; | |
`define PACK_ARRAY(PK_WIDTH,PK_LEN,PK_SRC,PK_DEST) generate for (pk_idx=0; pk_idx<(PK_LEN); pk_idx=pk_idx+1) begin assign PK_DEST[((PK_WIDTH)*pk_idx+((PK_WIDTH)-1)):((PK_WIDTH)*pk_idx)] = PK_SRC[pk_idx][((PK_WIDTH)-1):0]; end endgenerate | |
`define UNPACK_ARRAY(PK_WIDTH,PK_LEN,PK_DEST,PK_SRC) generate for (unpk_idx=0; unpk_idx<(PK_LEN); unpk_idx=unpk_idx+1) begin assign PK_DEST[unpk_idx][((PK_WIDTH)-1):0] = PK_SRC[((PK_WIDTH)*unpk_idx+(PK_WIDTH-1)):((PK_WIDTH)*unpk_idx)]; end endgenerate | |
genvar fa_idx; | |
wire [RAIL_NUM-1 : 0] carry_chain[WIDTH : 0]; | |
wire carry_chain_ack[WIDTH : 0]; | |
assign carry_chain[0] = in_c; | |
assign out_c = carry_chain[WIDTH]; | |
assign ack_c_o = carry_chain_ack[0]; | |
assign carry_chain_ack[WIDTH] = ack_c_i; | |
// pack inputs | |
wire [RAIL_NUM-1 : 0] in_a_up [WIDTH-1 : 0]; | |
`UNPACK_ARRAY(RAIL_NUM,WIDTH,in_a_up,in_a) | |
wire [RAIL_NUM-1 : 0] in_b_up [WIDTH-1 : 0]; | |
`UNPACK_ARRAY(RAIL_NUM,WIDTH,in_b_up,in_b) | |
// unpack output | |
wire [RAIL_NUM-1 : 0] out_s_up [WIDTH-1 : 0]; | |
//`PACK_ARRAY(WIDTH,RAIL_NUM,out_s_up,out_s) | |
`PACK_ARRAY(RAIL_NUM,WIDTH,out_s_up,out_s) | |
generate | |
for (fa_idx = 0; fa_idx < WIDTH; fa_idx = fa_idx + 1) | |
begin | |
el_fa_fl full_adder | |
( | |
//---------CTRL---------------- | |
.rst(rst), | |
//---------LINK-A-IN----------- | |
.ack_a_o(ack_a_o[fa_idx]), | |
.in_a(in_a_up[fa_idx]), | |
//---------LINK-B-IN----------- | |
.ack_b_o(ack_b_o[fa_idx]), | |
.in_b(in_b_up[fa_idx]), | |
//---------LINK-C-IN----------- | |
.ack_c_o(carry_chain_ack[fa_idx]), | |
.in_c(carry_chain[fa_idx]), | |
//---------LINK-S-OUT---------- | |
.ack_s_i(ack_s_i[fa_idx]), | |
.out_s(out_s_up[fa_idx]), | |
//---------LINK-C-OUT---------- | |
.ack_c_i(carry_chain_ack[fa_idx + 1]), | |
.out_c(carry_chain[fa_idx + 1]) | |
//----------------------------- | |
); | |
end | |
endgenerate | |
endmodule |