Partially implemented R-type instructions (still need to write rd values)

modules/instruction_module_classifier.sv

@@ -0,0 +1,18 @@
+`ifndef INSTRUCTION_CLASSIFIER_H_SV
+`define INSTRUCTION_CLASSIFIER_H_SV
+
+module instruction_module_classifier(
+    input logic [2:0] op,
+    output logic en_shifter,
+    output logic en_jmp,
+    output logic en_mul,
+    output logic en_alu,
+);
+    always_comb begin
+        en_shifter = (op & 3'b111) == 3'b000;
+        en_jmp = (op & 3'b111) == 3'b001;
+        en_mul = (op & 3'b110) == 3'b010;
+        en_alu = (op & 3'b100) == 3'b100;
+    end
+endmodule
+`endif