diff --git a/rtl/mips_cpu_memory.v b/rtl/mips_cpu_memory.v index 05e3e46..66daf1c 100644 --- a/rtl/mips_cpu_memory.v +++ b/rtl/mips_cpu_memory.v @@ -56,7 +56,7 @@ module mips_cpu_memory( //Synchronous write path always_ff @(posedge clk) begin - $display("Instruction Read: %h", instr_readdata); + //$display("Instruction Read: %h", instr_readdata); //$display("RAM : INFO : data_read=%h, data_address = %h, mem=%h", data_read, data_address, memory[data_address]); if (data_write) begin //cannot read and write to memory in the same cycle if (instr_address != data_address) begin //cannot modify the instruction being read diff --git a/rtl/mips_cpu_pc.v b/rtl/mips_cpu_pc.v index 69bd98e..3e1d8e0 100644 --- a/rtl/mips_cpu_pc.v +++ b/rtl/mips_cpu_pc.v @@ -26,25 +26,29 @@ always_ff @(posedge clk) begin active <= 0; end pc_out <= pc_next; + end +end + + +always_comb begin case(pc_ctrl) - default: begin - pc_next <= pc_out + 32'd4; - end 2'd1: begin // Branch - pc_next <= pc_out + 32'd4 + {{14{instr[15]}},instr[15:0],2'b00}; + pc_next = pc_out + 32'd4 + {{14{instr[15]}},instr[15:0],2'b00}; end 2'd2: begin // Jump - pc_next <= {pc_lit_next[31:28], instr[25:0], 2'b00}; + pc_next = {pc_lit_next[31:28], instr[25:0], 2'b00}; $display("JUMPING"); $display("pc_lit_next: %h", pc_lit_next[31:28]); $display("instr: %b", instr[25:0]); $display("%h",pc_next); end 2'd3: begin // Jump using Register - pc_next <= reg_readdata; + pc_next = reg_readdata; + end + default: begin + pc_next = pc_out + 32'd4; end endcase - end end endmodule // pc \ No newline at end of file