add xor instruction and PC logging

1 files changed, 4 insertions, 1 deletions

diff --git a/riscvsingle.sv b/riscvsingle.sv
index 91fbe19..f5933ce 100644
--- a/riscvsingle.sv
+++ b/riscvsingle.sv
@@ -99,7 +99,9 @@ module my_computer(input  logic        clk, reset,
   dmem dmem(clk, MemWrite, DataAddr, WriteData, ReadData, my_sw, my_rd);

   

   assign my_PC = PC;

-  

+

+   always_ff @(posedge clk)

+     $display("PC: %x", PC);

 endmodule

 

 // =======================================================================

@@ -275,6 +277,7 @@ module aludec(input  logic       opb5,
                           else          

                             ALUControl = 3'b000; // add, addi

                  3'b010:    ALUControl = 3'b101; // slt, slti

+                 3'b100:    ALUControl = 3'b100; // xor, xori

                  3'b110:    ALUControl = 3'b011; // or, ori

                  3'b111:    ALUControl = 3'b010; // and, andi

                  default:   ALUControl = 3'bxxx; // ???