mono/mini/genmdesc.pl

   1 #!/usr/bin/perl -w
   2
   3 # perl replacement of genmdesc.c for use when cross-compiling
   4
   5 use strict;
   6 no locale;
   7
   8 # must keep in sync with mini.h
   9 my @spec_names = qw(dest src1 src2 len clob);
  10 sub INST_DEST  () {return 0;}
  11 sub INST_SRC1  () {return 1;}
  12 sub INST_SRC2  () {return 2;}
  13 sub INST_LEN   () {return 3;}
  14 sub INST_CLOB  () {return 4;}
  15 sub INST_MAX   () {return 5;}
  16
  17 # this must include all the #defines used in mini-ops.h
  18 my @defines = qw (__i386__ __x86_64__ __ppc__ __powerpc__ __arm__
  19         __sparc__ sparc __s390__ s390 __ia64__ __alpha__ __mips__);
  20 my %table =();
  21 my @opcodes = ();
  22
  23 sub load_opcodes
  24 {
  25         my ($srcdir, $arch) = @_;
  26         my $opcodes_def = "$srcdir/../cil/opcode.def";
  27         my $i = 0;
  28         my $arch_found = 0;
  29
  30         my $cpp = $ENV{"CPP"};
  31         $cpp = "cpp" unless defined $cpp;
  32         $cpp .= " -undef ";
  33         foreach (@defines) {
  34                 $cpp .= " -U$_";
  35                 $arch_found = 1 if $arch eq $_;
  36         }
  37         die "$arch arch is not supported.\n" unless $arch_found;
  38
  39         $cpp .= " -D$arch $srcdir/mini-ops.h|";
  40         #print "Running: $cpp\n";
  41         open (OPS, $cpp) || die "Cannot execute cpp: $!";
  42         while (<OPS>) {
  43                 next unless /MINI_OP\s*\(\s*(\S+?)\s*,\s*"(.*?)"/;
  44                 my ($sym, $name) = ($1, $2);
  45                 push @opcodes, [$sym, $name];
  46                 $table{$name} = {num => $i, name => $name};
  47                 $i++;
  48         }
  49         close (OPS);
  50 }
  51
  52 sub load_file {
  53         my ($name) = @_;
  54         my $line = 0;
  55         my $comment = "";
  56
  57         open (DESC, $name) || die "Cannot open $name: $!";
  58         while (<DESC>) {
  59                 $line++;
  60                 next if /^\s*$/;
  61                 if (/^\s*(#.*)?$/) {
  62                         $comment .= "$1\n";
  63                         next;
  64                 }
  65                 my @values = split (/\s+/);
  66                 next unless ($values [0] =~ /(\S+?):/);
  67                 my $name = $1;
  68                 my $desc = $table {$name};
  69                 shift @values;
  70                 die "Invalid opcode $name at line $line\n" unless defined $desc;
  71                 die "Duplicated opcode $name at line $line\n" if $desc->{"desc"};
  72                 $desc->{"desc"} = $_;
  73                 $desc->{"comment"} = $comment;
  74                 $desc->{"spec"} = {};
  75                 $comment = "";
  76                 #print "values for $name: " . join (' ', @values) . " num: " . int(@values), "\n";
  77                 for my $val (@values) {
  78                         if ($val =~ /(\S+):(.*)/) {
  79                                 $desc->{"spec"}->{$1} = $2;
  80                         }
  81                 }
  82         }
  83         close (DESC);
  84 }
  85
  86 sub build_spec {
  87         my ($spec) = shift;
  88         my %spec = %{$spec};
  89         my @vals = ();
  90         foreach (@spec_names) {
  91                 my $val = $spec->{$_};
  92                 if (defined $val) {
  93                         push @vals, $val;
  94                 } else {
  95                         push @vals, undef;
  96                 }
  97         }
  98         #print "vals: " . join (' ', @vals) . "\n";
  99         my $res = "";
 100         for (my $i = 0; $i < @vals; ++$i) {
 101                 if (defined $vals [$i]) {
 102                         if ($i == INST_LEN) {
 103                                 $res .= sprintf ("\\x%x\" \"", +$vals [$i]);
 104                         } else {
 105                                 if ($vals [$i] =~ /^[a-zA-Z0-9]$/) {
 106                                         $res .= $vals [$i];
 107                                 } else {
 108                                         $res .= sprintf ("\\x%x\" \"", $vals [$i]);
 109                                 }
 110                         }
 111                 } else {
 112                         $res .= "\\x0\" \"";
 113                 }
 114         }
 115         return $res;
 116 }
 117
 118 sub build_table {
 119         my ($fname, $name) = @_;
 120         my $i;
 121         my $idx;
 122         my $idx_array = "const guint16 ${name}_idx [] = {\n";
 123
 124         open (OUT, ">$fname") || die "Cannot open file $fname: $!";
 125         print OUT "/* File automatically generated by genmdesc, don't change */\n\n";
 126         print OUT "const char $name [] = {\n";
 127         print OUT "\t\"" . ("\\x0" x INST_MAX) . "\"\t/* null entry */\n";
 128         $idx = 1;
 129
 130         for ($i = 0; $i < @opcodes; ++$i) {
 131                 my $name = $opcodes [$i]->[1];
 132                 my $desc = $table {$name};
 133                 my $spec = $desc->{"spec"};
 134                 if (defined $spec) {
 135                         print OUT "\t\"";
 136                         print OUT build_spec ($spec);
 137                         print OUT "\"\t/* $name */\n";
 138                         my $pos = $idx * INST_MAX;
 139                         $idx_array .= "\t$pos,\t/* $name */\n";
 140                         ++$idx;
 141                 } else {
 142                         $idx_array .= "\t0,\t/* $name */\n";
 143                 }
 144         }
 145         print OUT "};\n\n";
 146         print OUT "$idx_array};\n\n";
 147         close (OUT);
 148 }
 149
 150 sub usage {
 151         die "genmdesc.pl arch srcdir desc output name\n";
 152 }
 153
 154 my $arch = shift || usage ();
 155 my $srcdir = shift || usage ();
 156 my $file = shift || usage ();
 157 my $output = shift || usage ();
 158 my $name = shift || usage ();
 159
 160 load_opcodes ($srcdir, $arch);
 161 load_file ($file);
 162 build_table ($output, $name);
 163