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_si (insn_in : std_ulogic_vector) return std_ulogic_vector;
  10     function insn_ui (insn_in : std_ulogic_vector) return std_ulogic_vector;
  11     function insn_l (insn_in : std_ulogic_vector) return std_ulogic;
  12     function insn_sh32 (insn_in : std_ulogic_vector) return std_ulogic_vector;
  13     function insn_mb32 (insn_in : std_ulogic_vector) return std_ulogic_vector;
  14     function insn_me32 (insn_in : std_ulogic_vector) return std_ulogic_vector;
  15     function insn_li (insn_in : std_ulogic_vector) return std_ulogic_vector;
  16     function insn_lk (insn_in : std_ulogic_vector) return std_ulogic;
  17     function insn_aa (insn_in : std_ulogic_vector) return std_ulogic;
  18     function insn_rc (insn_in : std_ulogic_vector) return std_ulogic;
  19     function insn_oe (insn_in : std_ulogic_vector) return std_ulogic;
  20     function insn_bd (insn_in : std_ulogic_vector) return std_ulogic_vector;
  21     function insn_bf (insn_in : std_ulogic_vector) return std_ulogic_vector;
  22     function insn_bfa (insn_in : std_ulogic_vector) return std_ulogic_vector;
  23     function insn_fxm (insn_in : std_ulogic_vector) return std_ulogic_vector;
  24     function insn_bo (insn_in : std_ulogic_vector) return std_ulogic_vector;
  25     function insn_bi (insn_in : std_ulogic_vector) return std_ulogic_vector;
  26     function insn_bh (insn_in : std_ulogic_vector) return std_ulogic_vector;
  27     function insn_d (insn_in : std_ulogic_vector) return std_ulogic_vector;
  28     function insn_ds (insn_in : std_ulogic_vector) return std_ulogic_vector;
  29     function insn_to (insn_in : std_ulogic_vector) return std_ulogic_vector;
  30     function insn_bc (insn_in : std_ulogic_vector) return std_ulogic_vector;
  31     function insn_sh (insn_in : std_ulogic_vector) return std_ulogic_vector;
  32     function insn_me (insn_in : std_ulogic_vector) return std_ulogic_vector;
  33     function insn_mb (insn_in : std_ulogic_vector) return std_ulogic_vector;
  34 end package insn_helpers;
  35
  36 package body insn_helpers is
  37     function insn_rs (insn_in : std_ulogic_vector) return std_ulogic_vector is
  38     begin
  39         return insn_in(25 downto 21);
  40     end;
  41
  42     function insn_rt (insn_in : std_ulogic_vector) return std_ulogic_vector is
  43     begin
  44         return insn_in(25 downto 21);
  45     end;
  46
  47     function insn_ra (insn_in : std_ulogic_vector) return std_ulogic_vector is
  48     begin
  49         return insn_in(20 downto 16);
  50     end;
  51
  52     function insn_rb (insn_in : std_ulogic_vector) return std_ulogic_vector is
  53     begin
  54         return insn_in(15 downto 11);
  55     end;
  56
  57     function insn_si (insn_in : std_ulogic_vector) return std_ulogic_vector is
  58     begin
  59         return insn_in(15 downto 0);
  60     end;
  61
  62     function insn_ui (insn_in : std_ulogic_vector) return std_ulogic_vector is
  63     begin
  64         return insn_in(15 downto 0);
  65     end;
  66
  67     function insn_l (insn_in : std_ulogic_vector) return std_ulogic is
  68     begin
  69         return insn_in(21);
  70     end;
  71
  72     function insn_sh32 (insn_in : std_ulogic_vector) return std_ulogic_vector is
  73     begin
  74         return insn_in(15 downto 11);
  75     end;
  76
  77     function insn_mb32 (insn_in : std_ulogic_vector) return std_ulogic_vector is
  78     begin
  79         return insn_in(10 downto 6);
  80     end;
  81
  82     function insn_me32 (insn_in : std_ulogic_vector) return std_ulogic_vector is
  83     begin
  84         return insn_in(5 downto 1);
  85     end;
  86
  87     function insn_li (insn_in : std_ulogic_vector) return std_ulogic_vector is
  88     begin
  89         return insn_in(25 downto 2);
  90     end;
  91
  92     function insn_lk (insn_in : std_ulogic_vector) return std_ulogic is
  93     begin
  94         return insn_in(0);
  95     end;
  96
  97     function insn_aa (insn_in : std_ulogic_vector) return std_ulogic is
  98     begin
  99         return insn_in(1);
 100     end;
 101
 102     function insn_rc (insn_in : std_ulogic_vector) return std_ulogic is
 103     begin
 104         return insn_in(0);
 105     end;
 106
 107     function insn_oe (insn_in : std_ulogic_vector) return std_ulogic is
 108     begin
 109         return insn_in(10);
 110     end;
 111
 112     function insn_bd (insn_in : std_ulogic_vector) return std_ulogic_vector is
 113     begin
 114         return insn_in(15 downto 2);
 115     end;
 116
 117     function insn_bf (insn_in : std_ulogic_vector) return std_ulogic_vector is
 118     begin
 119         return insn_in(25 downto 23);
 120     end;
 121
 122     function insn_bfa (insn_in : std_ulogic_vector) return std_ulogic_vector is
 123     begin
 124         return insn_in(20 downto 18);
 125     end;
 126
 127     function insn_fxm (insn_in : std_ulogic_vector) return std_ulogic_vector is
 128     begin
 129         return insn_in(19 downto 12);
 130     end;
 131
 132     function insn_bo (insn_in : std_ulogic_vector) return std_ulogic_vector is
 133     begin
 134         return insn_in(25 downto 21);
 135     end;
 136
 137     function insn_bi (insn_in : std_ulogic_vector) return std_ulogic_vector is
 138     begin
 139         return insn_in(20 downto 16);
 140     end;
 141
 142     function insn_bh (insn_in : std_ulogic_vector) return std_ulogic_vector is
 143     begin
 144         return insn_in(12 downto 11);
 145     end;
 146
 147     function insn_d (insn_in : std_ulogic_vector) return std_ulogic_vector is
 148     begin
 149         return insn_in(15 downto 0);
 150     end;
 151
 152     function insn_ds (insn_in : std_ulogic_vector) return std_ulogic_vector is
 153     begin
 154         return insn_in(15 downto 2);
 155     end;
 156
 157     function insn_to (insn_in : std_ulogic_vector) return std_ulogic_vector is
 158     begin
 159         return insn_in(25 downto 21);
 160     end;
 161
 162     function insn_bc (insn_in : std_ulogic_vector) return std_ulogic_vector is
 163     begin
 164         return insn_in(10 downto 6);
 165     end;
 166
 167     function insn_sh (insn_in : std_ulogic_vector) return std_ulogic_vector is
 168     begin
 169         return insn_in(1) & insn_in(15 downto 11);
 170     end;
 171
 172     function insn_me (insn_in : std_ulogic_vector) return std_ulogic_vector is
 173     begin
 174         return insn_in(5) & insn_in(10 downto 6);
 175     end;
 176
 177     function insn_mb (insn_in : std_ulogic_vector) return std_ulogic_vector is
 178     begin
 179         return insn_in(5) & insn_in(10 downto 6);
 180     end;
 181 end package body insn_helpers;