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