decode_types.vhdl

   1 library ieee;
   2 use ieee.std_logic_1164.all;
   3
   4 package decode_types is
   5         type ppc_insn_t is (PPC_ILLEGAL, PPC_ADD, PPC_ADDC, PPC_ADDE,
   6                 PPC_ADDEX, PPC_ADDI, PPC_ADDIC, PPC_ADDIC_RC, PPC_ADDIS,
   7                 PPC_ADDME, PPC_ADDPCIS, PPC_ADDZE, PPC_AND, PPC_ANDC,
   8                 PPC_ANDI_RC, PPC_ANDIS_RC, PPC_ATTN, PPC_B, PPC_BA, PPC_BC,
   9                 PPC_BCA, PPC_BCCTR, PPC_BCLA, PPC_BCLR, PPC_BCTAR, PPC_BPERM,
  10                 PPC_CMP, PPC_CMPB, PPC_CMPEQB, PPC_CMPI, PPC_CMPL, PPC_CMPLI,
  11                 PPC_CMPRB, PPC_CNTLZD, PPC_CNTLZW, PPC_CNTTZD, PPC_CNTTZW,
  12                 PPC_CRAND, PPC_CRANDC, PPC_CREQV, PPC_CRNAND, PPC_CRNOR,
  13                 PPC_CROR, PPC_CRORC, PPC_CRXOR, PPC_DARN, PPC_DCBF, PPC_DCBST,
  14                 PPC_DCBT, PPC_DCBTST, PPC_DCBZ, PPC_DIVD, PPC_DIVDE,
  15                 PPC_DIVDEU, PPC_DIVDU, PPC_DIVW, PPC_DIVWE, PPC_DIVWEU,
  16                 PPC_DIVWU, PPC_EQV, PPC_EXTSB, PPC_EXTSH, PPC_EXTSW,
  17                 PPC_EXTSWSLI, PPC_ICBI, PPC_ICBT, PPC_ISEL, PPC_ISYNC,
  18                 PPC_LBARX, PPC_LBZ, PPC_LBZU, PPC_LBZUX, PPC_LBZX, PPC_LD,
  19                 PPC_LDARX, PPC_LDBRX, PPC_LDU, PPC_LDUX, PPC_LDX, PPC_LHA,
  20                 PPC_LHARX, PPC_LHAU, PPC_LHAUX, PPC_LHAX, PPC_LHBRX, PPC_LHZ,
  21                 PPC_LHZU, PPC_LHZUX, PPC_LHZX, PPC_LWA, PPC_LWARX, PPC_LWAUX,
  22                 PPC_LWAX, PPC_LWBRX, PPC_LWZ, PPC_LWZU, PPC_LWZUX, PPC_LWZX,
  23                 PPC_MADDHD, PPC_MADDHDU, PPC_MADDLD, PPC_MCRF, PPC_MCRXR,
  24                 PPC_MCRXRX, PPC_MFCR, PPC_MFOCRF, PPC_MFSPR, PPC_MFTB,
  25                 PPC_MODSD, PPC_MODSW, PPC_MODUD, PPC_MODUW, PPC_MTCRF,
  26                 PPC_MFCTR, PPC_MTCTR, PPC_MFLR, PPC_MTLR, PPC_MTOCRF,
  27                 PPC_MTSPR, PPC_MULHD, PPC_MULHDU, PPC_MULHW, PPC_MULHWU,
  28                 PPC_MULLD, PPC_MULLI, PPC_MULLW, PPC_NAND, PPC_NEG, PPC_NOR,
  29                 PPC_OR, PPC_ORC, PPC_ORI, PPC_ORIS, PPC_POPCNTB, PPC_POPCNTD,
  30                 PPC_POPCNTW, PPC_PRTYD, PPC_PRTYW, PPC_RLDCL, PPC_RLDCR,
  31                 PPC_RLDIC, PPC_RLDICL, PPC_RLDICR, PPC_RLDIMI, PPC_RLWIMI,
  32                 PPC_RLWINM, PPC_RLWNM, PPC_SETB, PPC_SLD, PPC_SLW, PPC_SRAD,
  33                 PPC_SRADI, PPC_SRAW, PPC_SRAWI, PPC_SRD, PPC_SRW, PPC_STB,
  34                 PPC_STBCX, PPC_STBU, PPC_STBUX, PPC_STBX, PPC_STD, PPC_STDBRX,
  35                 PPC_STDCX, PPC_STDU, PPC_STDUX, PPC_STDX, PPC_STH, PPC_STHBRX,
  36                 PPC_STHCX, PPC_STHU, PPC_STHUX, PPC_STHX, PPC_STW, PPC_STWBRX,
  37                 PPC_STWCX, PPC_STWU, PPC_STWUX, PPC_STWX, PPC_SUBF, PPC_SUBFC,
  38                 PPC_SUBFE, PPC_SUBFIC, PPC_SUBFME, PPC_SUBFZE, PPC_SYNC, PPC_TD,
  39                 PPC_TDI, PPC_TW, PPC_TWI, PPC_XOR, PPC_XORI, PPC_XORIS,
  40                 PPC_SIM_READ, PPC_SIM_POLL, PPC_SIM_WRITE, PPC_SIM_CONFIG);
  41
  42         type insn_type_t is (OP_ILLEGAL, OP_NOP, OP_ADD, OP_ADDC, OP_ADDEX, OP_ADDME,
  43                 OP_ADDPCIS, OP_AND, OP_ANDC, OP_ATTN, OP_B, OP_BA, OP_BC,
  44                 OP_BCA, OP_BCCTR, OP_BCLA, OP_BCLR, OP_BCTAR, OP_BPERM, OP_CMP,
  45                 OP_CMPB, OP_CMPEQB, OP_CMPL, OP_CMPRB,
  46                 OP_CNTLZD, OP_CNTLZW, OP_CNTTZD, OP_CNTTZW, OP_CRAND,
  47                 OP_CRANDC, OP_CREQV, OP_CRNAND, OP_CRNOR, OP_CROR, OP_CRORC,
  48                 OP_CRXOR, OP_DARN, OP_DCBF, OP_DCBST, OP_DCBT, OP_DCBTST,
  49                 OP_DCBZ, OP_DIVD, OP_DIVDE, OP_DIVDEU, OP_DIVDU, OP_DIVW,
  50                 OP_DIVWE, OP_DIVWEU, OP_DIVWU, OP_EQV, OP_EXTSB, OP_EXTSH,
  51                 OP_EXTSW, OP_EXTSWSLI, OP_ICBI, OP_ICBT, OP_ISEL, OP_ISYNC,
  52                 OP_LOAD, OP_STORE, OP_MADDHD, OP_MADDHDU, OP_MADDLD, OP_MCRF,
  53                 OP_MCRXR, OP_MCRXRX, OP_MFCR, OP_MFOCRF, OP_MFCTR, OP_MFLR,
  54                 OP_MFTB, OP_MFSPR, OP_MODSD, OP_MODSW, OP_MODUD, OP_MODUW,
  55                 OP_MTCRF, OP_MTOCRF, OP_MTCTR, OP_MTLR, OP_MTSPR, OP_MUL_L64,
  56                 OP_MUL_H64, OP_MUL_H32, OP_NAND, OP_NEG, OP_NOR, OP_OR,
  57                 OP_ORC, OP_POPCNTB, OP_POPCNTD, OP_POPCNTW, OP_PRTYD,
  58                 OP_PRTYW, OP_RLDCL, OP_RLDCR, OP_RLDIC, OP_RLDICL, OP_RLDICR,
  59                 OP_RLDIMI, OP_RLWIMI, OP_RLWINM, OP_RLWNM, OP_SETB, OP_SLD,
  60                 OP_SLW, OP_SRAD, OP_SRADI, OP_SRAW, OP_SRAWI, OP_SRD, OP_SRW,
  61                 OP_SUBF, OP_SUBFC, OP_SUBFME, OP_SYNC, OP_TD, OP_TDI, OP_TW,
  62                 OP_TWI, OP_XOR, OP_SIM_READ, OP_SIM_POLL, OP_SIM_WRITE,
  63                 OP_SIM_CONFIG);
  64
  65         type input_reg_a_t is (NONE, RA, RA_OR_ZERO, RS);
  66         type input_reg_b_t is (NONE, RB, RS, CONST_UI, CONST_SI, CONST_SI_HI, CONST_UI_HI, CONST_LI, CONST_BD, CONST_DS);
  67         type input_reg_c_t is (NONE, RS);
  68         type output_reg_a_t is (NONE, RT, RA);
  69         type constant_a_t is (NONE, SH, SH32, FXM, BO, BF, TOO, BC);
  70         type constant_b_t is (NONE, MB, ME, MB32, BI, L);
  71         type constant_c_t is (NONE, ME32, BH);
  72         type rc_t is (NONE, ONE, RC);
  73
  74         constant SH_OFFSET : integer := 0;
  75         constant MB_OFFSET : integer := 1;
  76         constant ME_OFFSET : integer := 1;
  77         constant SH32_OFFSET : integer := 0;
  78         constant MB32_OFFSET : integer := 1;
  79         constant ME32_OFFSET : integer := 2;
  80
  81         constant FXM_OFFSET : integer := 0;
  82
  83         constant BO_OFFSET : integer := 0;
  84         constant BI_OFFSET : integer := 1;
  85         constant BH_OFFSET : integer := 2;
  86
  87         constant BF_OFFSET : integer := 0;
  88         constant L_OFFSET  : integer := 1;
  89
  90         constant TOO_OFFSET : integer := 0;
  91
  92         type unit_t is (NONE, ALU, LDST, MUL);
  93         type length_t is (NONE, is1B, is2B, is4B, is8B);
  94
  95         type decode_rom_t is record
  96                 unit         : unit_t;
  97                 insn_type    : insn_type_t;
  98                 input_reg_a  : input_reg_a_t;
  99                 input_reg_b  : input_reg_b_t;
 100                 input_reg_c  : input_reg_c_t;
 101                 output_reg_a : output_reg_a_t;
 102
 103                 const_a      : constant_a_t;
 104                 const_b      : constant_b_t;
 105                 const_c      : constant_c_t;
 106
 107                 input_cr     : std_ulogic;
 108                 output_cr    : std_ulogic;
 109
 110                 input_carry  : std_ulogic;
 111                 output_carry : std_ulogic;
 112
 113                 -- load/store signals
 114                 length       : length_t;
 115                 byte_reverse : std_ulogic;
 116                 sign_extend  : std_ulogic;
 117                 update       : std_ulogic;
 118                 reserve      : std_ulogic;
 119
 120                 -- multiplier signals
 121                 mul_32bit     : std_ulogic;
 122                 mul_signed    : std_ulogic;
 123
 124                 rc           : rc_t;
 125                 lr           : std_ulogic;
 126
 127                 sgl_pipe     : std_ulogic;
 128         end record;
 129         constant decode_rom_init : decode_rom_t := (unit => NONE,
 130                 insn_type => OP_ILLEGAL, input_reg_a => NONE,
 131                 input_reg_b => NONE, input_reg_c => NONE,
 132                 output_reg_a => NONE, const_a => NONE, const_b => NONE,
 133                 const_c => NONE, input_cr => '0', output_cr => '0',
 134                 input_carry => '0', output_carry => '0',
 135                 length => NONE, byte_reverse => '0', sign_extend => '0',
 136                 update => '0', reserve => '0', mul_32bit => '0',
 137                 mul_signed => '0', rc => NONE, lr => '0', sgl_pipe => '0');
 138
 139 end decode_types;
 140
 141 package body decode_types is
 142 end decode_types;