insn_helpers.vhdl

   1 library ieee;
   2 use ieee.std_logic_1164.all;
   3
   4 package insn_helpers is
   5     function insn_rs (insn_in : std_ulogic_vector) return std_ulogic_vector;
   6     function insn_rt (insn_in : std_ulogic_vector) return std_ulogic_vector;
   7     function insn_ra (insn_in : std_ulogic_vector) return std_ulogic_vector;
   8     function insn_rb (insn_in : std_ulogic_vector) return std_ulogic_vector;
   9     function insn_rcreg (insn_in : std_ulogic_vector) return std_ulogic_vector;
  10     function insn_si (insn_in : std_ulogic_vector) return std_ulogic_vector;
  11     function insn_ui (insn_in : std_ulogic_vector) return std_ulogic_vector;
  12     function insn_l (insn_in : std_ulogic_vector) return std_ulogic;
  13     function insn_sh32 (insn_in : std_ulogic_vector) return std_ulogic_vector;
  14     function insn_mb32 (insn_in : std_ulogic_vector) return std_ulogic_vector;
  15     function insn_me32 (insn_in : std_ulogic_vector) return std_ulogic_vector;
  16     function insn_li (insn_in : std_ulogic_vector) return std_ulogic_vector;
  17     function insn_lk (insn_in : std_ulogic_vector) return std_ulogic;
  18     function insn_aa (insn_in : std_ulogic_vector) return std_ulogic;
  19     function insn_rc (insn_in : std_ulogic_vector) return std_ulogic;
  20     function insn_oe (insn_in : std_ulogic_vector) return std_ulogic;
  21     function insn_bd (insn_in : std_ulogic_vector) return std_ulogic_vector;
  22     function insn_bf (insn_in : std_ulogic_vector) return std_ulogic_vector;
  23     function insn_bfa (insn_in : std_ulogic_vector) return std_ulogic_vector;
  24     function insn_cr (insn_in : std_ulogic_vector) return std_ulogic_vector;
  25     function insn_bt (insn_in : std_ulogic_vector) return std_ulogic_vector;
  26     function insn_ba (insn_in : std_ulogic_vector) return std_ulogic_vector;
  27     function insn_bb (insn_in : std_ulogic_vector) return std_ulogic_vector;
  28     function insn_fxm (insn_in : std_ulogic_vector) return std_ulogic_vector;
  29     function insn_bo (insn_in : std_ulogic_vector) return std_ulogic_vector;
  30     function insn_bi (insn_in : std_ulogic_vector) return std_ulogic_vector;
  31     function insn_bh (insn_in : std_ulogic_vector) return std_ulogic_vector;
  32     function insn_d (insn_in : std_ulogic_vector) return std_ulogic_vector;
  33     function insn_ds (insn_in : std_ulogic_vector) return std_ulogic_vector;
  34     function insn_dq (insn_in : std_ulogic_vector) return std_ulogic_vector;
  35     function insn_dx (insn_in : std_ulogic_vector) return std_ulogic_vector;
  36     function insn_to (insn_in : std_ulogic_vector) return std_ulogic_vector;
  37     function insn_bc (insn_in : std_ulogic_vector) return std_ulogic_vector;
  38     function insn_sh (insn_in : std_ulogic_vector) return std_ulogic_vector;
  39     function insn_me (insn_in : std_ulogic_vector) return std_ulogic_vector;
  40     function insn_mb (insn_in : std_ulogic_vector) return std_ulogic_vector;
  41     function insn_frt (insn_in : std_ulogic_vector) return std_ulogic_vector;
  42     function insn_fra (insn_in : std_ulogic_vector) return std_ulogic_vector;
  43     function insn_frb (insn_in : std_ulogic_vector) return std_ulogic_vector;
  44     function insn_frc (insn_in : std_ulogic_vector) return std_ulogic_vector;
  45     function insn_u (insn_in : std_ulogic_vector) return std_ulogic_vector;
  46 end package insn_helpers;
  47
  48 package body insn_helpers is
  49     function insn_rs (insn_in : std_ulogic_vector) return std_ulogic_vector is
  50     begin
  51         return insn_in(25 downto 21);
  52     end;
  53
  54     function insn_rt (insn_in : std_ulogic_vector) return std_ulogic_vector is
  55     begin
  56         return insn_in(25 downto 21);
  57     end;
  58
  59     function insn_ra (insn_in : std_ulogic_vector) return std_ulogic_vector is
  60     begin
  61         return insn_in(20 downto 16);
  62     end;
  63
  64     function insn_rb (insn_in : std_ulogic_vector) return std_ulogic_vector is
  65     begin
  66         return insn_in(15 downto 11);
  67     end;
  68
  69     function insn_rcreg (insn_in : std_ulogic_vector) return std_ulogic_vector is
  70     begin
  71         return insn_in(10 downto 6);
  72     end;
  73
  74     function insn_si (insn_in : std_ulogic_vector) return std_ulogic_vector is
  75     begin
  76         return insn_in(15 downto 0);
  77     end;
  78
  79     function insn_ui (insn_in : std_ulogic_vector) return std_ulogic_vector is
  80     begin
  81         return insn_in(15 downto 0);
  82     end;
  83
  84     function insn_l (insn_in : std_ulogic_vector) return std_ulogic is
  85     begin
  86         return insn_in(21);
  87     end;
  88
  89     function insn_sh32 (insn_in : std_ulogic_vector) return std_ulogic_vector is
  90     begin
  91         return insn_in(15 downto 11);
  92     end;
  93
  94     function insn_mb32 (insn_in : std_ulogic_vector) return std_ulogic_vector is
  95     begin
  96         return insn_in(10 downto 6);
  97     end;
  98
  99     function insn_me32 (insn_in : std_ulogic_vector) return std_ulogic_vector is
 100     begin
 101         return insn_in(5 downto 1);
 102     end;
 103
 104     function insn_li (insn_in : std_ulogic_vector) return std_ulogic_vector is
 105     begin
 106         return insn_in(25 downto 2);
 107     end;
 108
 109     function insn_lk (insn_in : std_ulogic_vector) return std_ulogic is
 110     begin
 111         return insn_in(0);
 112     end;
 113
 114     function insn_aa (insn_in : std_ulogic_vector) return std_ulogic is
 115     begin
 116         return insn_in(1);
 117     end;
 118
 119     function insn_rc (insn_in : std_ulogic_vector) return std_ulogic is
 120     begin
 121         return insn_in(0);
 122     end;
 123
 124     function insn_oe (insn_in : std_ulogic_vector) return std_ulogic is
 125     begin
 126         return insn_in(10);
 127     end;
 128
 129     function insn_bd (insn_in : std_ulogic_vector) return std_ulogic_vector is
 130     begin
 131         return insn_in(15 downto 2);
 132     end;
 133
 134     function insn_bf (insn_in : std_ulogic_vector) return std_ulogic_vector is
 135     begin
 136         return insn_in(25 downto 23);
 137     end;
 138
 139     function insn_bfa (insn_in : std_ulogic_vector) return std_ulogic_vector is
 140     begin
 141         return insn_in(20 downto 18);
 142     end;
 143
 144     function insn_cr (insn_in : std_ulogic_vector) return std_ulogic_vector is
 145     begin
 146         return insn_in(10 downto 1);
 147     end;
 148
 149     function insn_bb (insn_in : std_ulogic_vector) return std_ulogic_vector is
 150     begin
 151         return insn_in(15 downto 11);
 152     end;
 153
 154     function insn_ba (insn_in : std_ulogic_vector) return std_ulogic_vector is
 155     begin
 156         return insn_in(20 downto 16);
 157     end;
 158
 159     function insn_bt (insn_in : std_ulogic_vector) return std_ulogic_vector is
 160     begin
 161         return insn_in(25 downto 21);
 162     end;
 163
 164     function insn_fxm (insn_in : std_ulogic_vector) return std_ulogic_vector is
 165     begin
 166         return insn_in(19 downto 12);
 167     end;
 168
 169     function insn_bo (insn_in : std_ulogic_vector) return std_ulogic_vector is
 170     begin
 171         return insn_in(25 downto 21);
 172     end;
 173
 174     function insn_bi (insn_in : std_ulogic_vector) return std_ulogic_vector is
 175     begin
 176         return insn_in(20 downto 16);
 177     end;
 178
 179     function insn_bh (insn_in : std_ulogic_vector) return std_ulogic_vector is
 180     begin
 181         return insn_in(12 downto 11);
 182     end;
 183
 184     function insn_d (insn_in : std_ulogic_vector) return std_ulogic_vector is
 185     begin
 186         return insn_in(15 downto 0);
 187     end;
 188
 189     function insn_ds (insn_in : std_ulogic_vector) return std_ulogic_vector is
 190     begin
 191         return insn_in(15 downto 2);
 192     end;
 193
 194     function insn_dq (insn_in : std_ulogic_vector) return std_ulogic_vector is
 195     begin
 196         return insn_in(15 downto 4);
 197     end;
 198
 199     function insn_dx (insn_in : std_ulogic_vector) return std_ulogic_vector is
 200     begin
 201         return insn_in(15 downto 6) & insn_in(20 downto 16) & insn_in(0);
 202     end;
 203
 204     function insn_to (insn_in : std_ulogic_vector) return std_ulogic_vector is
 205     begin
 206         return insn_in(25 downto 21);
 207     end;
 208
 209     function insn_bc (insn_in : std_ulogic_vector) return std_ulogic_vector is
 210     begin
 211         return insn_in(10 downto 6);
 212     end;
 213
 214     function insn_sh (insn_in : std_ulogic_vector) return std_ulogic_vector is
 215     begin
 216         return insn_in(1) & insn_in(15 downto 11);
 217     end;
 218
 219     function insn_me (insn_in : std_ulogic_vector) return std_ulogic_vector is
 220     begin
 221         return insn_in(5) & insn_in(10 downto 6);
 222     end;
 223
 224     function insn_mb (insn_in : std_ulogic_vector) return std_ulogic_vector is
 225     begin
 226         return insn_in(5) & insn_in(10 downto 6);
 227     end;
 228
 229     function insn_frt(insn_in : std_ulogic_vector) return std_ulogic_vector is
 230     begin
 231         return insn_in(25 downto 21);
 232     end;
 233
 234     function insn_fra(insn_in : std_ulogic_vector) return std_ulogic_vector is
 235     begin
 236         return insn_in(20 downto 16);
 237     end;
 238
 239     function insn_frb(insn_in : std_ulogic_vector) return std_ulogic_vector is
 240     begin
 241         return insn_in(15 downto 11);
 242     end;
 243
 244     function insn_frc(insn_in : std_ulogic_vector) return std_ulogic_vector is
 245     begin
 246         return insn_in(10 downto 6);
 247     end;
 248
 249     function insn_u(insn_in : std_ulogic_vector) return std_ulogic_vector is
 250     begin
 251         return insn_in(15 downto 12);
 252     end;
 253 end package body insn_helpers;