Changeset 119 for sandbox

Timestamp:

Feb 16, 2011, 5:04:54 PM (14 years ago)

Author:

demin

Message:

replace parallel_add with lpm_add_sub

File:

• sandbox/MultiChannelUSB/cic_filter.v (modified) (2 diffs)

sandbox/MultiChannelUSB/cic_filter.v

@@ -31 +31 @@
         wire    [size*widthr-1:0]       acc_data_wire [2:0], del_data_wire [1:0];
 
+        wire    [size*widthr-1:0]       add_data_wire, sub_data_wire;
+
 
         integer i;
@@ -41 +43 @@
 
                         // -2*del_data_1 + del_data_2 + inp_data + result
-                        parallel_add #(
-                                .msw_subtract("YES"),
-                                .representation("SIGNED"),
-                                .result_alignment("LSB"),
-                                .shift(0),
-                                .size(4),
-                                .width(widthr),
-                                .widthr(widthr)) acc_unit_1 (
-                                .data({
-                                        {del_data_wire[0][j*widthr+widthr-1],del_data_wire[0][j*widthr+widthr-3:j*widthr], 1'b0},
-                                        {del_data_wire[1][j*widthr+widthr-1:j*widthr]},
-                                        {acc_data_reg[0][j*widthr+widthr-1:j*widthr]},
-                                        {acc_data_reg[1][j*widthr+widthr-1:j*widthr]}}),
+
+                        lpm_add_sub     #(
+                                .lpm_direction("ADD"),
+                                .lpm_hint("ONE_INPUT_IS_CONSTANT=NO,CIN_USED=NO"),
+                                .lpm_representation("SIGNED"),
+                                .lpm_type("LPM_ADD_SUB"),
+                                .lpm_width(widthr)) add_unit_1 (
+                                .dataa(acc_data_reg[0][j*widthr+widthr-1:j*widthr]),
+                                .datab(del_data_wire[1][j*widthr+widthr-1:j*widthr]),
+                                .result(add_data_wire[j*widthr+widthr-1:j*widthr]));
+
+                        lpm_add_sub     #(
+                                .lpm_direction("SUB"),
+                                .lpm_hint("ONE_INPUT_IS_CONSTANT=NO,CIN_USED=NO"),
+                                .lpm_representation("SIGNED"),
+                                .lpm_type("LPM_ADD_SUB"),
+                                .lpm_width(widthr)) sub_unit_1 (
+                                .dataa(acc_data_reg[1][j*widthr+widthr-1:j*widthr]),
+                                .datab({del_data_wire[0][j*widthr+widthr-1],del_data_wire[0][j*widthr+widthr-3:j*widthr], 1'b0}),
+                                .result(sub_data_wire[j*widthr+widthr-1:j*widthr]));
+
+                        lpm_add_sub     #(
+                                .lpm_direction("ADD"),
+                                .lpm_hint("ONE_INPUT_IS_CONSTANT=NO,CIN_USED=NO"),
+                                .lpm_representation("SIGNED"),
+                                .lpm_type("LPM_ADD_SUB"),
+                                .lpm_width(widthr)) acc_unit_1 (
+                                .dataa(add_data_wire[j*widthr+widthr-1:j*widthr]),
+                                .datab(sub_data_wire[j*widthr+widthr-1:j*widthr]),
                                 .result(acc_data_wire[1][j*widthr+widthr-1:j*widthr]));
 
-                        parallel_add #(
-                                .msw_subtract("NO"),
-                                .representation("SIGNED"),
-                                .result_alignment("LSB"),
-                                .shift(0),
-                                .size(2),
-                                .width(widthr),
-                                .widthr(widthr)) acc_unit_2 (
-                                .data({
-                                        {acc_data_reg[1][j*widthr+widthr-1:j*widthr]},
-                                        {acc_data_reg[2][j*widthr+widthr-1:j*widthr]}}),
+                        lpm_add_sub     #(
+                                .lpm_direction("ADD"),
+                                .lpm_hint("ONE_INPUT_IS_CONSTANT=NO,CIN_USED=NO"),
+                                .lpm_representation("SIGNED"),
+                                .lpm_type("LPM_ADD_SUB"),
+                                .lpm_width(widthr)) acc_unit_2 (
+                                .dataa(acc_data_reg[1][j*widthr+widthr-1:j*widthr]),
+                                .datab(acc_data_reg[2][j*widthr+widthr-1:j*widthr]),
                                 .result(acc_data_wire[2][j*widthr+widthr-1:j*widthr]));