//Actually the node is a CSA and not a ACS.`include "defs.h"module ACS2_1(metric0,  metric1, 			sub_enc_bits, 			new_metric0,  new_metric1,  compare);input   [8-1:0] metric0,  metric1;input   [4-1:0] sub_enc_bits;output  [8-1:0] new_metric0,  new_metric1;output  compare;wire   [`W-1:0] sub_metrs = ~metric0 + metric1;wire   compare = sub_metrs[`W-1];wire   [`W-1:0] survival = (compare == 1 ? metric0 : metric1);wire   [`S-1:0] metric_change = sub_enc_bits;wire   [`W-1:0] signext_m = {{`W-`S{metric_change[`S-1]}},  metric_change};assign new_metric0 = survival + signext_m;assign new_metric1 = survival - signext_m;endmodule