Subversion Repositories turbo8051

// synopsys translate_on

// Debug Purpose only

// Stack Pointer Push & Pop analysis

reg [7:0]   StackMem[$];

reg  [7:0]  stack_pop;

reg  [7:0]  pushpop_cnt;

// Assumption, Both Write and Read access will not be

// possbile in single clock cycle

always @(posedge wb_clk_i or posedge wb_rst_i)

begin

   if(wb_rst_i) begin

      pushpop_cnt = 0;

   end

   else begin

      if(ram_wr_sel==`OC8051_RWS_SP) begin

            StackMem.push_back(wr_dat);

            pushpop_cnt = pushpop_cnt + 1;

      end

      if(ram_rd_sel==`OC8051_RRS_SP) begin

            stack_pop = StackMem.pop_back();

            pushpop_cnt = pushpop_cnt - 1;

            #2  // Add 1ns Delay to take care of Ram Dealy

            if(stack_pop != ram_data) begin

              $display("ERROR: Invalid Stack Pointer Pop Detected, Exp: %x,Rxd:%x",stack_pop,ram_data);

              $stop;

            end

      end

   end

end

// synopsys translate_off