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