diff --git a/xgriscv_datapath.v b/xgriscv_datapath.v
index 6ea15816f706e0b81d535fb1e3c3271312ae8acc..a34101759860d9d3bb7942772d6a1a4995319b1e 100644
--- a/xgriscv_datapath.v
+++ b/xgriscv_datapath.v
@@ -52,12 +52,13 @@ module datapath(
 	
 
 	//更新pc
+	wire [`ADDR_SIZE-1:0]   base, offset;
     wire                    stall = 1'b0;
 	wire [`ADDR_SIZE-1:0]   newpc;
     pcenr      	pcr(clk, reset, ~stall, newpc, pc);
     addr_adder  pcadder(pc, `ADDR_SIZE'b100, pcplus4);
-	sl1         pcsft(immout, immoutsft);
-	addr_adder  pcjal(pc, immoutsft, pcbranch);
+	sl1         pcsft(immout, shftimm);
+	addr_adder  pcjal(base, offset, pcbranch);
 
 	wire [4:0]              shamt;
 
@@ -68,7 +69,9 @@ module datapath(
 	mux3 #(32)   mx2(rdata1, 0, pc, alusrca, a); //alu input a
 	mux2 #(5)    mx3(rdata2[4:0], instr[24:20], itype, shamt); //alu input shamt
 	mux2 #(32)   mx4(pcplus4, pcbranch, pcsrc, newpc);//pc input 
-	mux2 #(32)   mx5(wdata, pcplus4, jal, wdata);// wdata input pcplus4
+	mux2 #(32)   mx5(shftimm, immout, jalr, offset);//sum input b
+	mux2 #(32)   mx6(pc, rdata1, jalr, base);//sum input a
+	mux2 #(32)   mx7(wdata, pcplus4, jal, wdata);//wdata input pcplus4
 
 	imm 	im(iimm, simm, bimm, uimm, jimm, immctrl, immout);