id_queue: Parametrize number of compare ports (#230)

src/id_queue.sv

@@ -50,6 +50,7 @@ module id_queue #(
     parameter int CAPACITY  = 0,
     parameter bit FULL_BW   = 0,
     parameter bit CUT_OUP_POP_INP_GNT = 0,
+    parameter int NUM_CMP_PORTS = 1,
     parameter type data_t   = logic[31:0],
     // Dependent parameters, DO NOT OVERRIDE!
     localparam type id_t    = logic[ID_WIDTH-1:0]
@@ -62,11 +63,11 @@ module id_queue #(
     input  logic    inp_req_i,
     output logic    inp_gnt_o,
 
-    input  data_t   exists_data_i,
-    input  data_t   exists_mask_i,
-    input  logic    exists_req_i,
-    output logic    exists_o,
-    output logic    exists_gnt_o,
+    input  data_t [NUM_CMP_PORTS-1:0] exists_data_i,
+    input  data_t [NUM_CMP_PORTS-1:0] exists_mask_i,
+    input  logic  [NUM_CMP_PORTS-1:0] exists_req_i,
+    output logic  [NUM_CMP_PORTS-1:0] exists_o,
+    output logic  [NUM_CMP_PORTS-1:0] exists_gnt_o,
 
     input  id_t     oup_id_i,
     input  logic    oup_pop_i,
@@ -118,8 +119,8 @@ module id_queue #(
                                     idx_matches_in_id,
                                     idx_matches_out_id;
 
-    logic [CAPACITY-1:0]            exists_match,
-                                    linked_data_free;
+    logic [NUM_CMP_PORTS-1:0][CAPACITY-1:0] exists_match;
+    logic [CAPACITY-1:0]            linked_data_free;
 
     id_t                            match_in_id, match_out_id;
 
@@ -357,29 +358,32 @@ module id_queue #(
     end
 
     // Exists Lookup
-    for (genvar i = 0; i < CAPACITY; i++) begin: gen_lookup
-        data_t exists_match_bits;
-        for (genvar j = 0; j < $bits(data_t); j++) begin: gen_mask
-            always_comb begin
-                if (linked_data_q[i].free) begin
-                    exists_match_bits[j] = 1'b0;
-                end else begin
-                    if (!exists_mask_i[j]) begin
-                        exists_match_bits[j] = 1'b1;
+    for (genvar k = 0; k < NUM_CMP_PORTS; k++) begin: gen_lookup_port
+        for (genvar i = 0; i < CAPACITY; i++) begin: gen_lookup
+            data_t exists_match_bits;
+            for (genvar j = 0; j < $bits(data_t); j++) begin: gen_mask
+                always_comb begin
+                    if (linked_data_q[i].free) begin
+                        exists_match_bits[j] = 1'b0;
                     end else begin
-                        exists_match_bits[j] = (linked_data_q[i].data[j] == exists_data_i[j]);
+                        if (!exists_mask_i[k][j]) begin
+                            exists_match_bits[j] = 1'b1;
+                        end else begin
+                            exists_match_bits[j] =
+                                (linked_data_q[i].data[j] == exists_data_i[k][j]);
+                        end
                     end
                 end
             end
+            assign exists_match[k][i] = (&exists_match_bits);
         end
-        assign exists_match[i] = (&exists_match_bits);
-    end
-    always_comb begin
-        exists_gnt_o = 1'b0;
-        exists_o = '0;
-        if (exists_req_i) begin
-            exists_gnt_o = 1'b1;
-            exists_o = (|exists_match);
+        always_comb begin
+            exists_gnt_o[k] = 1'b0;
+            exists_o[k] = '0;
+            if (exists_req_i[k]) begin
+                exists_gnt_o[k] = 1'b1;
+                exists_o[k] = (|exists_match[k]);
+            end
         end
     end