update on approx_mult - by nam

cme433_lrtestbench-main/src/Si_find.sv

 module Si_find(
     input  logic signed [ 7:0] i_b,
-    output reg [3:0] S
+    output reg [3:0] S,
+    output reg [2:0] group[0:3]
 );
 
 reg [8:0] group_select_binary;
@@ -21,6 +22,7 @@ always @ *
         // endcase
 
         S[i] = group_select_binary[2];
+        group[i] = group_select_binary[2:0];
         group_select_binary = group_select_binary >> 2;
       end
   end

cme433_lrtestbench-main/src/approx_model.sv

+module approx_model(
+ input logic signed [8:0] pp0, pp1, pp2, pp3,
+ input logic [3:0] E,
+ output logic signed [11:0] pp0_out,
+ output logic signed [10:0] pp1_out,
+ output logic signed [10:0] pp2_out,
+ output logic signed [9:0]  pp3_out
+);
+
+always @ * begin
+  pp0_out <= {E[0],~E[0],~E[0],pp0};
+  pp1_out <= {1'b1,E[1],pp1};
+  pp2_out <= {1'b1,E[2],pp2};
+  pp3_out <= {E[3],pp3};
+end
+
+endmodule

cme433_lrtestbench-main/src/approx_mult.sv

@@ -14,14 +14,16 @@ always @ *
 
   end
 
-wire [3:0] S;
-wire [3:0] E;
+reg [3:0] S;
+reg [3:0] E;
 
 reg [11:0] partial_product_0;
 reg [10:0] partial_product_1, partial_product_2;
 reg [9:0] partial_product_3;
 reg [15:0] result;
+reg [2:0] group[0:3];
 
+// Stage 1
 Ei_find e(
   .S(S),
   .i_a(i_a),
@@ -30,7 +32,8 @@ Ei_find e(
 
 Si_find s(
   .i_b(i_b),
-  .S(S)
+  .S(S),
+  .group(group)
 );
 
 // result r(
@@ -41,4 +44,9 @@ Si_find s(
 //   .result(result)
 // )
 
+// stage 2
+// stage 3
+
+// stage 4
+// stage 5
 endmodule : approx_mult

cme433_lrtestbench-main/src/partial_product.sv

+module partial_product(
+input logic signed [7:0] i_a,
+input logic[2:0] radix_option,
+output logic signed [8:0] partial_p
+);
+
+always @ * begin
+	if (radix_option == 3'd3)
+		partial_p = 2*i_a;
+	else if (radix_option == 3'd4)
+		partial_p = ~(2*i_a);
+	else if ((radix_option == 3'd1) || (radix_option == 3'd2))
+		partial_p = i_a;
+	else if ((radix_option == 3'd5) || (radix_option == 3'd6))
+		partial_p = ~(i_a);
+	else
+		partial_p = 9'd0;
+end
+
+
+
+endmodule