RTL code refactoring

hw/rtl/interfaces/VX_csr_req_if.v

@@ -0,0 +1,20 @@
+`ifndef VX_CSR_REQ
+`define VX_CSR_REQ
+
+`include "../VX_define.vh"
+
+interface VX_csr_req_if ();
+
+	wire [`NUM_THREADS-1:0] valid;
+	wire [`NW_BITS-1:0] warp_num;
+	wire [4:0]      	rd;
+	wire [1:0]      	wb;
+	wire [4:0]      	alu_op;
+	wire           		is_csr;
+	wire [11:0]     	csr_address;
+	wire           		csr_immed;
+	wire [31:0]     	csr_mask;
+
+endinterface
+
+`endif