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