regs.pl

   1 #!/usr/bin/perl
   2 # $Id$
   3 #
   4 # Read regs.dat and output regs.h and regs.c (included in names.c)
   5 #
   6
   7 $nline = 0;
   8
   9 sub toint($) {
  10     my($v) = @_;
  11
  12     return ($v =~ /^0/) ? oct $v : $v+0;
  13 }
  14
  15 sub process_line($) {
  16     my($line) = @_;
  17     my @v;
  18
  19     if ( $line !~ /^\s*(\S+)\s*(\S+)\s*(\S+)\s*([0-9]+)$/i ) {
  20         die "regs.dat:$nline: invalid input\n";
  21     }
  22     $reg      = $1;
  23     $aclass   = $2;
  24     $dclasses = $3;
  25     $x86regno = toint($4);
  26
  27     if ($reg =~ /^(.*[^0-9])([0-9]+)\-([0-9]+)(|[^0-9].*)$/) {
  28         $nregs = $3-$2+1;
  29         $reg = $1.$2.$4;
  30         $reg_nr = $2;
  31         $reg_prefix = $1;
  32         $reg_suffix = $4;
  33     } else {
  34         $nregs = 1;
  35         undef $reg_prefix, $reg_suffix;
  36     }
  37
  38     while ($nregs--) {
  39         $regs{$reg} = $aclass;
  40         $regvals{$reg} = $x86regno;
  41
  42         foreach $dclass (split(/,/, $dclasses)) {
  43             if ( !defined($disclass{$dclass}) ) {
  44                 $disclass{$dclass} = [];
  45             }
  46
  47             $disclass{$dclass}->[$x86regno] = $reg;
  48         }
  49
  50         # Compute the next register, if any
  51         if (defined($reg_prefix)) {
  52             $x86regno++;
  53             $reg_nr++;
  54             $reg = sprintf("%s%u%s", $reg_prefix, $reg_nr, $reg_suffix);
  55         } else {
  56             # Not a dashed sequence
  57             die if ($nregs);
  58         }
  59     }
  60 }
  61
  62 ($fmt, $file) = @ARGV;
  63
  64 %regs = ();
  65 %regvals = ();
  66 %disclass = ();
  67 open(REGS, "< ${file}") or die "$0: Cannot open $file\n";
  68 while ( defined($line = <REGS>) ) {
  69     $nline++;
  70
  71     chomp $line;
  72     $line =~ s/\s*(\#.*|)$//;
  73
  74     next if ( $line eq '' );
  75
  76     process_line($line);
  77 }
  78 close(REGS);
  79
  80 if ( $fmt eq 'h' ) {
  81     # Output regs.h
  82     print "/* automatically generated from $file - do not edit */\n";
  83     $expr_regs = 1;
  84     printf "#define EXPR_REG_START %d\n", $expr_regs;
  85     print "enum reg_enum {\n";
  86     $attach = ' = EXPR_REG_START'; # EXPR_REG_START == 1
  87     foreach $reg ( sort(keys(%regs)) ) {
  88         print "    R_\U${reg}\E${attach},\n";
  89         $attach = ''; $ch = ',';
  90         $expr_regs++;
  91     }
  92     print "    REG_ENUM_LIMIT\n";
  93     print "};\n\n";
  94     printf "#define EXPR_REG_END %d\n", $expr_regs-1;
  95     foreach $reg ( sort(keys(%regs)) ) {
  96         printf "#define %-15s %2d\n", "REG_NUM_\U${reg}", $regvals{$reg};
  97     }
  98     print "\n";
  99 } elsif ( $fmt eq 'c' ) {
 100     # Output regs.c
 101     print "/* automatically generated from $file - do not edit */\n";
 102     print "static const char *reg_names[] = "; $ch = '{';
 103     # This one has no dummy entry for 0
 104     foreach $reg ( sort(keys(%regs)) ) {
 105         print "$ch\n    \"${reg}\"";
 106         $ch = ',';
 107     }
 108     print "\n};\n";
 109 } elsif ( $fmt eq 'fc' ) {
 110     # Output regflags.c
 111     print "/* automatically generated from $file - do not edit */\n";
 112     print "static const int32_t reg_flags[] = {\n";
 113     print "    0";              # Dummy entry for 0
 114     foreach $reg ( sort(keys(%regs)) ) {
 115         print ",\n    ", $regs{$reg}; # Print the class of the register
 116     }
 117     print "\n};\n";
 118 } elsif ( $fmt eq 'vc' ) {
 119     # Output regvals.c
 120     print "/* automatically generated from $file - do not edit */\n";
 121     print "static const int regvals[] = {\n";
 122     print "    -1";             # Dummy entry for 0
 123     foreach $reg ( sort(keys(%regs)) ) {
 124         printf ",\n    %2d", $regvals{$reg}; # Print the regval of the register
 125     }
 126     print "\n};\n";
 127 } elsif ( $fmt eq 'dc' ) {
 128     # Output regdis.c
 129     print "/* automatically generated from $file - do not edit */\n";
 130     foreach $class ( sort(keys(%disclass)) ) {
 131         printf "static const int rd_%-8s[] = {", $class;
 132         @foo = @{$disclass{$class}};
 133         @bar = ();
 134         for ( $i = 0 ; $i < scalar(@foo) ; $i++ ) {
 135             if (defined($foo[$i])) {
 136                 push(@bar, "R_\U$foo[$i]\E");
 137             } else {
 138                 die "$0: No register name for class $class, value $i\n";
 139             }
 140         }
 141         print join(',', @bar), "};\n";
 142     }
 143 } else {
 144     die "$0: Unknown output format\n";
 145 }