flow/RV32i/riscv.sv

module riscv (input         clk, reset,
              output [31:0] pc,
              output [31:0] pcnext,
              input [31:0]  instr,
              output 	    memwrite,
              output [31:0] aluout, writedata,
              input [31:0]  readdata,
	      output 	    memread,
	      output 	    suspend);

   wire 		    memtoreg, pcsrc, branch, unsign,
			    jump, alusrc, alu2src, regwrite, sltunsigned;
   wire [3:0] 		    alucontrol;
   wire [2:0] 		    imm;
   wire 		    lt, gt, eq;
   wire [1:0] 		    shtype;
   wire [31:0] signimm;

   wire [31:0] ISR;
   wire        ISRsel;   
   wire        storepc;
   wire        pcadd;
   wire        pcext;

   // in progress
   assign ISRsel = 1'b0;
   assign ISR = 32'b0;

   controller c (.op(instr[6:0]), .funct7(instr[31:25]),
                 .funct3(instr[14:12]), 
                 .memtoreg(memtoreg),
                 .memwrite(memwrite),
                 .pcsrc(pcsrc),
                 .alusrc(alusrc),
                 .regwrite(regwrite),
                 .branch(branch),
                 .storepc(storepc),
                 .pcadd(pcadd),
		 .pcext(pcext),
		 .unsign(unsign),
                 .imm(imm),
                 .alucontrol(alucontrol),
		 .shtype(shtype),
		 .alu2src(alu2src),
		 .gt(gt), .lt(lt), .eq(eq),
		 .suspend(suspend),
		 .sltunsigned(sltunsigned),
		 .memread(memread));
   datapath dp (.clk(clk), .reset(reset),
                .memtoreg(memtoreg), .pcsrc(pcsrc),
                .alusrc(alusrc), .regwrite(regwrite), 
                .alucontrol(alucontrol),
		.storepc(storepc),
		.pcadd(pcadd),
		.pcext(pcext),
		.unsign(unsign),
		.imm(imm),
		.alu2src(alu2src),
		.shtype(shtype),
                .pc(pc),
                .pcnext(pcnext),		
                .instr(instr),
                .aluout(aluout),
                .writedata(writedata),
                .readdata(readdata),
		.gt(gt), .lt(lt), .eq(eq),
		.sltunsigned(sltunsigned),
		.ISR(ISR), .ISRsel(ISRsel),
		.suspend(suspend));

endmodule // riscv