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     function insn_prefix_r(prefix : std_ulogic_vector) return std_ulogic;
  47     function insn_prefixed_si(prefix : std_ulogic_vector; suffix : std_ulogic_vector)
  48         return std_ulogic_vector;
  49 end package insn_helpers;
  50
  51 package body insn_helpers is
  52     function insn_rs (insn_in : std_ulogic_vector) return std_ulogic_vector is
  53     begin
  54         return insn_in(25 downto 21);
  55     end;
  56
  57     function insn_rt (insn_in : std_ulogic_vector) return std_ulogic_vector is
  58     begin
  59         return insn_in(25 downto 21);
  60     end;
  61
  62     function insn_ra (insn_in : std_ulogic_vector) return std_ulogic_vector is
  63     begin
  64         return insn_in(20 downto 16);
  65     end;
  66
  67     function insn_rb (insn_in : std_ulogic_vector) return std_ulogic_vector is
  68     begin
  69         return insn_in(15 downto 11);
  70     end;
  71
  72     function insn_rcreg (insn_in : std_ulogic_vector) return std_ulogic_vector is
  73     begin
  74         return insn_in(10 downto 6);
  75     end;
  76
  77     function insn_si (insn_in : std_ulogic_vector) return std_ulogic_vector is
  78     begin
  79         return insn_in(15 downto 0);
  80     end;
  81
  82     function insn_ui (insn_in : std_ulogic_vector) return std_ulogic_vector is
  83     begin
  84         return insn_in(15 downto 0);
  85     end;
  86
  87     function insn_l (insn_in : std_ulogic_vector) return std_ulogic is
  88     begin
  89         return insn_in(21);
  90     end;
  91
  92     function insn_sh32 (insn_in : std_ulogic_vector) return std_ulogic_vector is
  93     begin
  94         return insn_in(15 downto 11);
  95     end;
  96
  97     function insn_mb32 (insn_in : std_ulogic_vector) return std_ulogic_vector is
  98     begin
  99         return insn_in(10 downto 6);
 100     end;
 101
 102     function insn_me32 (insn_in : std_ulogic_vector) return std_ulogic_vector is
 103     begin
 104         return insn_in(5 downto 1);
 105     end;
 106
 107     function insn_li (insn_in : std_ulogic_vector) return std_ulogic_vector is
 108     begin
 109         return insn_in(25 downto 2);
 110     end;
 111
 112     function insn_lk (insn_in : std_ulogic_vector) return std_ulogic is
 113     begin
 114         return insn_in(0);
 115     end;
 116
 117     function insn_aa (insn_in : std_ulogic_vector) return std_ulogic is
 118     begin
 119         return insn_in(1);
 120     end;
 121
 122     function insn_rc (insn_in : std_ulogic_vector) return std_ulogic is
 123     begin
 124         return insn_in(0);
 125     end;
 126
 127     function insn_oe (insn_in : std_ulogic_vector) return std_ulogic is
 128     begin
 129         return insn_in(10);
 130     end;
 131
 132     function insn_bd (insn_in : std_ulogic_vector) return std_ulogic_vector is
 133     begin
 134         return insn_in(15 downto 2);
 135     end;
 136
 137     function insn_bf (insn_in : std_ulogic_vector) return std_ulogic_vector is
 138     begin
 139         return insn_in(25 downto 23);
 140     end;
 141
 142     function insn_bfa (insn_in : std_ulogic_vector) return std_ulogic_vector is
 143     begin
 144         return insn_in(20 downto 18);
 145     end;
 146
 147     function insn_cr (insn_in : std_ulogic_vector) return std_ulogic_vector is
 148     begin
 149         return insn_in(10 downto 1);
 150     end;
 151
 152     function insn_bb (insn_in : std_ulogic_vector) return std_ulogic_vector is
 153     begin
 154         return insn_in(15 downto 11);
 155     end;
 156
 157     function insn_ba (insn_in : std_ulogic_vector) return std_ulogic_vector is
 158     begin
 159         return insn_in(20 downto 16);
 160     end;
 161
 162     function insn_bt (insn_in : std_ulogic_vector) return std_ulogic_vector is
 163     begin
 164         return insn_in(25 downto 21);
 165     end;
 166
 167     function insn_fxm (insn_in : std_ulogic_vector) return std_ulogic_vector is
 168     begin
 169         return insn_in(19 downto 12);
 170     end;
 171
 172     function insn_bo (insn_in : std_ulogic_vector) return std_ulogic_vector is
 173     begin
 174         return insn_in(25 downto 21);
 175     end;
 176
 177     function insn_bi (insn_in : std_ulogic_vector) return std_ulogic_vector is
 178     begin
 179         return insn_in(20 downto 16);
 180     end;
 181
 182     function insn_bh (insn_in : std_ulogic_vector) return std_ulogic_vector is
 183     begin
 184         return insn_in(12 downto 11);
 185     end;
 186
 187     function insn_d (insn_in : std_ulogic_vector) return std_ulogic_vector is
 188     begin
 189         return insn_in(15 downto 0);
 190     end;
 191
 192     function insn_ds (insn_in : std_ulogic_vector) return std_ulogic_vector is
 193     begin
 194         return insn_in(15 downto 2);
 195     end;
 196
 197     function insn_dq (insn_in : std_ulogic_vector) return std_ulogic_vector is
 198     begin
 199         return insn_in(15 downto 4);
 200     end;
 201
 202     function insn_dx (insn_in : std_ulogic_vector) return std_ulogic_vector is
 203     begin
 204         return insn_in(15 downto 6) & insn_in(20 downto 16) & insn_in(0);
 205     end;
 206
 207     function insn_to (insn_in : std_ulogic_vector) return std_ulogic_vector is
 208     begin
 209         return insn_in(25 downto 21);
 210     end;
 211
 212     function insn_bc (insn_in : std_ulogic_vector) return std_ulogic_vector is
 213     begin
 214         return insn_in(10 downto 6);
 215     end;
 216
 217     function insn_sh (insn_in : std_ulogic_vector) return std_ulogic_vector is
 218     begin
 219         return insn_in(1) & insn_in(15 downto 11);
 220     end;
 221
 222     function insn_me (insn_in : std_ulogic_vector) return std_ulogic_vector is
 223     begin
 224         return insn_in(5) & insn_in(10 downto 6);
 225     end;
 226
 227     function insn_mb (insn_in : std_ulogic_vector) return std_ulogic_vector is
 228     begin
 229         return insn_in(5) & insn_in(10 downto 6);
 230     end;
 231
 232     function insn_frt(insn_in : std_ulogic_vector) return std_ulogic_vector is
 233     begin
 234         return insn_in(25 downto 21);
 235     end;
 236
 237     function insn_fra(insn_in : std_ulogic_vector) return std_ulogic_vector is
 238     begin
 239         return insn_in(20 downto 16);
 240     end;
 241
 242     function insn_frb(insn_in : std_ulogic_vector) return std_ulogic_vector is
 243     begin
 244         return insn_in(15 downto 11);
 245     end;
 246
 247     function insn_frc(insn_in : std_ulogic_vector) return std_ulogic_vector is
 248     begin
 249         return insn_in(10 downto 6);
 250     end;
 251
 252     function insn_u(insn_in : std_ulogic_vector) return std_ulogic_vector is
 253     begin
 254         return insn_in(15 downto 12);
 255     end;
 256
 257     function insn_prefix_r(prefix : std_ulogic_vector) return std_ulogic is
 258     begin
 259         return prefix(20);
 260     end;
 261
 262     function insn_prefixed_si(prefix : std_ulogic_vector; suffix : std_ulogic_vector)
 263         return std_ulogic_vector is
 264     begin
 265         return prefix(17 downto 0) & suffix(15 downto 0);
 266     end;
 267
 268 end package body insn_helpers;