cpu_0_test_bench.v

NIOSII 实验指导

module cpu_0_test_bench (
                          // inputs:
                           D_iw,
                           D_iw_op,
                           D_iw_opx,
                           D_valid,
                           E_alu_result,
                           E_mem_byte_en,
                           E_st_data,
                           E_valid,
                           F_pcb,
                           F_valid,
                           R_ctrl_ld,
                           R_ctrl_ld_non_io,
                           R_dst_regnum,
                           R_wr_dst_reg,
                           W_alu_result,
                           W_bstatus_reg,
                           W_cmp_result,
                           W_estatus_reg,
                           W_ienable_reg,
                           W_ipending_reg,
                           W_status_reg,
                           W_valid,
                           W_wr_data,
                           av_ld_data_aligned_unfiltered,
                           clk,
                           d_address,
                           d_byteenable,
                           d_read,
                           d_write_nxt,
                           i_address,
                           i_read,
                           i_readdata,
                           i_waitrequest,
                           reset_n,

                          // outputs:
                           av_ld_data_aligned_filtered,
                           d_write
                        );

  output  [ 31: 0] av_ld_data_aligned_filtered;
  output           d_write;
  input   [ 31: 0] D_iw;
  input   [  5: 0] D_iw_op;
  input   [  5: 0] D_iw_opx;
  input            D_valid;
  input   [ 31: 0] E_alu_result;
  input   [  3: 0] E_mem_byte_en;
  input   [ 31: 0] E_st_data;
  input            E_valid;
  input   [ 21: 0] F_pcb;
  input            F_valid;
  input            R_ctrl_ld;
  input            R_ctrl_ld_non_io;
  input   [  4: 0] R_dst_regnum;
  input            R_wr_dst_reg;
  input   [ 31: 0] W_alu_result;
  input            W_bstatus_reg;
  input            W_cmp_result;
  input            W_estatus_reg;
  input   [ 31: 0] W_ienable_reg;
  input   [ 31: 0] W_ipending_reg;
  input            W_status_reg;
  input            W_valid;
  input   [ 31: 0] W_wr_data;
  input   [ 31: 0] av_ld_data_aligned_unfiltered;
  input            clk;
  input   [ 21: 0] d_address;
  input   [  3: 0] d_byteenable;
  input            d_read;
  input            d_write_nxt;
  input   [ 21: 0] i_address;
  input            i_read;
  input   [ 31: 0] i_readdata;
  input            i_waitrequest;
  input            reset_n;

  wire    [ 55: 0] D_inst;
  wire             D_op_add;
  wire             D_op_addi;
  wire             D_op_and;
  wire             D_op_andhi;
  wire             D_op_andi;
  wire             D_op_beq;
  wire             D_op_bge;
  wire             D_op_bgeu;
  wire             D_op_blt;
  wire             D_op_bltu;
  wire             D_op_bne;
  wire             D_op_br;
  wire             D_op_break;
  wire             D_op_bret;
  wire             D_op_call;
  wire             D_op_callr;
  wire             D_op_cmpeq;
  wire             D_op_cmpeqi;
  wire             D_op_cmpge;
  wire             D_op_cmpgei;
  wire             D_op_cmpgeu;
  wire             D_op_cmpgeui;
  wire             D_op_cmplt;
  wire             D_op_cmplti;
  wire             D_op_cmpltu;
  wire             D_op_cmpltui;
  wire             D_op_cmpne;
  wire             D_op_cmpnei;
  wire             D_op_custom;
  wire             D_op_div;
  wire             D_op_divu;
  wire             D_op_eret;
  wire             D_op_flushd;
  wire             D_op_flushi;
  wire             D_op_flushp;
  wire             D_op_hbreak;
  wire             D_op_initd;
  wire             D_op_initi;
  wire             D_op_intr;
  wire             D_op_jmp;
  wire             D_op_ldb;
  wire             D_op_ldbio;
  wire             D_op_ldbu;
  wire             D_op_ldbuio;
  wire             D_op_ldh;
  wire             D_op_ldhio;
  wire             D_op_ldhu;
  wire             D_op_ldhuio;
  wire             D_op_ldw;
  wire             D_op_ldwio;
  wire             D_op_mul;
  wire             D_op_muli;
  wire             D_op_mulxss;
  wire             D_op_mulxsu;
  wire             D_op_mulxuu;
  wire             D_op_nextpc;
  wire             D_op_nor;
  wire             D_op_opx;
  wire             D_op_or;
  wire             D_op_orhi;
  wire             D_op_ori;
  wire             D_op_rdctl;
  wire             D_op_ret;
  wire             D_op_rol;
  wire             D_op_roli;
  wire             D_op_ror;
  wire             D_op_rsv01;
  wire             D_op_rsv02;
  wire             D_op_rsv09;
  wire             D_op_rsv10;
  wire             D_op_rsv17;
  wire             D_op_rsv18;
  wire             D_op_rsv19;
  wire             D_op_rsv25;
  wire             D_op_rsv26;
  wire             D_op_rsv27;
  wire             D_op_rsv29;
  wire             D_op_rsv31;
  wire             D_op_rsv33;
  wire             D_op_rsv34;
  wire             D_op_rsv41;
  wire             D_op_rsv42;
  wire             D_op_rsv49;
  wire             D_op_rsv56;
  wire             D_op_rsv57;
  wire             D_op_rsv61;
  wire             D_op_rsv62;
  wire             D_op_rsv63;
  wire             D_op_rsvx00;
  wire             D_op_rsvx10;
  wire             D_op_rsvx15;
  wire             D_op_rsvx17;
  wire             D_op_rsvx20;
  wire             D_op_rsvx21;
  wire             D_op_rsvx25;
  wire             D_op_rsvx33;
  wire             D_op_rsvx34;
  wire             D_op_rsvx35;
  wire             D_op_rsvx42;
  wire             D_op_rsvx43;
  wire             D_op_rsvx44;
  wire             D_op_rsvx47;
  wire             D_op_rsvx50;
  wire             D_op_rsvx51;
  wire             D_op_rsvx55;
  wire             D_op_rsvx56;
  wire             D_op_rsvx60;
  wire             D_op_rsvx62;
  wire             D_op_rsvx63;
  wire             D_op_sll;
  wire             D_op_slli;
  wire             D_op_sra;
  wire             D_op_srai;
  wire             D_op_srl;
  wire             D_op_srli;
  wire             D_op_stb;
  wire             D_op_stbio;
  wire             D_op_sth;
  wire             D_op_sthio;
  wire             D_op_stw;
  wire             D_op_stwio;
  wire             D_op_sub;
  wire             D_op_sync;
  wire             D_op_trap;
  wire             D_op_wrctl;
  wire             D_op_xor;
  wire             D_op_xorhi;
  wire             D_op_xori;
  wire    [ 55: 0] W_vinst;
  wire    [ 31: 0] av_ld_data_aligned_filtered;
  wire             av_ld_data_aligned_unfiltered_0_is_x;
  wire             av_ld_data_aligned_unfiltered_10_is_x;
  wire             av_ld_data_aligned_unfiltered_11_is_x;
  wire             av_ld_data_aligned_unfiltered_12_is_x;
  wire             av_ld_data_aligned_unfiltered_13_is_x;
  wire             av_ld_data_aligned_unfiltered_14_is_x;
  wire             av_ld_data_aligned_unfiltered_15_is_x;
  wire             av_ld_data_aligned_unfiltered_16_is_x;
  wire             av_ld_data_aligned_unfiltered_17_is_x;
  wire             av_ld_data_aligned_unfiltered_18_is_x;
  wire             av_ld_data_aligned_unfiltered_19_is_x;
  wire             av_ld_data_aligned_unfiltered_1_is_x;
  wire             av_ld_data_aligned_unfiltered_20_is_x;
  wire             av_ld_data_aligned_unfiltered_21_is_x;
  wire             av_ld_data_aligned_unfiltered_22_is_x;
  wire             av_ld_data_aligned_unfiltered_23_is_x;
  wire             av_ld_data_aligned_unfiltered_24_is_x;
  wire             av_ld_data_aligned_unfiltered_25_is_x;
  wire             av_ld_data_aligned_unfiltered_26_is_x;
  wire             av_ld_data_aligned_unfiltered_27_is_x;
  wire             av_ld_data_aligned_unfiltered_28_is_x;
  wire             av_ld_data_aligned_unfiltered_29_is_x;
  wire             av_ld_data_aligned_unfiltered_2_is_x;
  wire             av_ld_data_aligned_unfiltered_30_is_x;
  wire             av_ld_data_aligned_unfiltered_31_is_x;
  wire             av_ld_data_aligned_unfiltered_3_is_x;
  wire             av_ld_data_aligned_unfiltered_4_is_x;
  wire             av_ld_data_aligned_unfiltered_5_is_x;
  wire             av_ld_data_aligned_unfiltered_6_is_x;
  wire             av_ld_data_aligned_unfiltered_7_is_x;
  wire             av_ld_data_aligned_unfiltered_8_is_x;
  wire             av_ld_data_aligned_unfiltered_9_is_x;
  reg              d_write;
  wire             rf_wr;
  wire    [ 31: 0] rf_wr_data;
  assign rf_wr = R_wr_dst_reg | R_ctrl_ld;
  assign rf_wr_data = R_ctrl_ld ? av_ld_data_aligned_filtered : W_wr_data;
  always @(posedge clk or negedge reset_n)
    begin
      if (reset_n == 0)
          d_write <= 0;
      else if (1'b1)
          d_write <= d_write_nxt;
    end


  assign D_op_muli = D_iw_op[5 : 0] == 36;
  assign D_op_bge = D_iw_op[5 : 0] == 14;
  assign D_op_ldbio = D_iw_op[5 : 0] == 39;
  assign D_op_cmpnei = D_iw_op[5 : 0] == 24;
  assign D_op_ori = D_iw_op[5 : 0] == 20;
  assign D_op_stwio = D_iw_op[5 : 0] == 53;
  assign D_op_rsv01 = D_iw_op[5 : 0] == 1;
  assign D_op_rsv02 = D_iw_op[5 : 0] == 2;
  assign D_op_cmpltui = D_iw_op[5 : 0] == 48;
  assign D_op_bgeu = D_iw_op[5 : 0] == 46;
  assign D_op_beq = D_iw_op[5 : 0] == 38;
  assign D_op_andi = D_iw_op[5 : 0] == 12;
  assign D_op_ldw = D_iw_op[5 : 0] == 23;
  assign D_op_stb = D_iw_op[5 : 0] == 5;
  assign D_op_cmpgei = D_iw_op[5 : 0] == 8;
  assign D_op_opx = D_iw_op[5 : 0] == 58;
  assign D_op_rsv41 = D_iw_op[5 : 0] == 41;
  assign D_op_rsv25 = D_iw_op[5 : 0] == 25;
  assign D_op_rsv09 = D_iw_op[5 : 0] == 9;
  assign D_op_ldhuio = D_iw_op[5 : 0] == 43;