microcode.txt

DLX CPU VHDL CODE UNIVERSITY

! lines beginning with an exclamation point are remed
! each opcode has a max of 8 states and the way to calculate opcode
! starting state # is
!  (2^3)*((m=?0)and(x or$40))or((m=?1)and(x or$80))or((m!=0)&(m!=1)&n))
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!DO NOT USE TABS IN THIS FILE !!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!control bits
! 0 = read
! 1 = write
! 2 = addr_latch_en
! 3 = instr_latch_en
! 4 = immed_signext_en
! 9-5 = ALU_op
! 10 = PC_out_en1
! 11 = PC_out_en2
! 12 = fpreg_port1_en
! 13 = fpreg_port2_en
! 14 = fpreg_port3_en
! 15 = fpreg_port4_en
! 16 = reg_port1_en
! 17 = reg_port2_en
! 18 = reg_port3_en
! 19 = reg_port4_en
! 20 = fpreg_port1_mux_sel
! 21 = fpreg_port2_mux_sel
! 22 = fpreg_port3_mux_sel
! 23 = reg_port1_mux_sel
! 24 = reg_port2_mux_sel
! 25 = reg_port3_mux_sel
! 26 = reg_port4_mux_sel
! 27 = reg_res_latch_en
! 30-28 = main_mux_sel
! 31 = datao_latch_oen
! 32 = data0_latch_len
! 33 = fpdatao_latch_oen
! 34 = fpdatao_latch_len
! 35 = jump
! 36 = jump_without_add
! 37 = PC_incr
! 38 = addr_latch_l
! 39 = name_signext_en
! 41-40 = shift_op
! 42 = shift_mux
! 43 = force_reg_31_dest   
! 44 = beqz
! 45 = bnez
! 47-46 = multdiv_op
! 48 = fsr_latch_en
! 49 = fpreg_por3_incr
! 50 = fp2_en
! 51 = fpreg_port3_data_sel
! 54-52 = convert_op
! 55 = fpreg_res_latch_en
! 59-56 = fpadd_op
! 61-60 = float_mux_sel
! 62 = feedback_latch_l
! 63 = feedback_latch_en
! 64 = fpdisp_out_oen
! 65 = fpdisp_out_len
! 66 = fpreg_port2_incr
! 67 = bfpt
! 68 = bfpf
! 70-69 = fpmult_op
! 72-71 = fpdiv_op
! 74-73 = fsr_mux_sel
!
! 95 = next_op
!
!address      name           control
!0       1         2         0         1         2         3         4         5         6         7         8         9      
!2345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345
00000000      reset          000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
00000001      fetch          100100000010000000000000000000000000010000000000000000000000000000000000000000000000000000000000 
00000002      decode         000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
00000118      lw0            000011100000000010000000000000000000001000000000000000000000000000000000000000000000000000000000
00000119      lw1            101000000000000000000000000101000000000000000000000000000000000000000000000000000000000000000000
0000011a      lw2            000000000000000000100000000000000000000000000000000000000000000000000000000000000000000000000001
00000200      nop0           000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
00000201      nop2           000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
00000202      nop3           000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001
00000300      add0           000001100000000011000000100100000000000000000000000000000000000000000000000000000000000000000000
00000301      add1           000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
00000302      add2           000000000000000000100000010000000000000000000000000000000000000000000000000000000000000000000001
00000310      sub0           000000010000000011000000100100000000000000000000000000000000000000000000000000000000000000000000
00000311      sub1           000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
00000312      sub2           000000000000000000100000010000000000000000000000000000000000000000000000000000000000000000000001
00000320      and0           000001010000000011000000100100000000000000000000000000000000000000000000000000000000000000000000
00000321      and1           000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
00000322      and2           000000000000000000100000010000000000000000000000000000000000000000000000000000000000000000000001
00000328      or0            000000110000000011000000100100000000000000000000000000000000000000000000000000000000000000000000
00000329      or1            000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000032a      or2            000000000000000000100000010000000000000000000000000000000000000000000000000000000000000000000001
00000330      xor0           000001110000000011000000100100000000000000000000000000000000000000000000000000000000000000000000
00000331      xor1           000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
00000332      xor2           000000000000000000100000010000000000000000000000000000000000000000000000000000000000000000000001
00000350      slt0           000000100100000011000000100100000000000000000000000000000000000000000000000000000000000000000000
00000351      slt1           000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
00000352      slt2           000000000000000000100000010000000000000000000000000000000000000000000000000000000000000000000001
!0       1         2         0         1         2         3         4         5         6         7         8         9      
!2345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345
00000308      addu0          000001101000000011000000100100000000000000000000000000000000000000000000000000000000000000000000
00000309      addu1          000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000030a      addu2          000000000000000000100000010000000000000000000000000000000000000000000000000000000000000000000001
00000318      subu0          000000011000000011000000100100000000000000000000000000000000000000000000000000000000000000000000
00000319      subu1          000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
0000031a      subu2          000000000000000000100000010000000000000000000000000000000000000000000000000000000000000000000001
00000340      seq0           000001011000000011000000100100000000000000000000000000000000000000000000000000000000000000000000
00000341      seq1           000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
00000342      seq2           000000000000000000100000010000000000000000000000000000000000000000000000000000000000000000000001
00000368      sge0           000000111000000011000000100100000000000000000000000000000000000000000000000000000000000000000000