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#!/usr/bin/perl
#
# Read regs.dat and output regs.h and regs.c (included in names.c)
#
$nline = 0;
sub toint($) {
my($v) = @_;
return ($v =~ /^0/) ? oct $v : $v+0;
}
sub process_line($) {
my($line) = @_;
my @v;
if ( $line !~ /^\s*(\S+)\s*(\S+)\s*(\S+)\s*([0-9]+)$/i ) {
die "regs.dat:$nline: invalid input\n";
}
$reg = $1;
$aclass = $2;
$dclasses = $3;
$x86regno = toint($4);
if ($reg =~ /^(.*[^0-9])([0-9]+)\-([0-9]+)(|[^0-9].*)$/) {
$nregs = $3-$2+1;
$reg = $1.$2.$4;
$reg_nr = $2;
$reg_prefix = $1;
$reg_suffix = $4;
} else {
$nregs = 1;
undef $reg_prefix, $reg_suffix;
}
while ($nregs--) {
$regs{$reg} = $aclass;
$regvals{$reg} = $x86regno;
foreach $dclass (split(/,/, $dclasses)) {
if ( !defined($disclass{$dclass}) ) {
$disclass{$dclass} = [];
}
$disclass{$dclass}->[$x86regno] = $reg;
}
# Compute the next register, if any
if (defined($reg_prefix)) {
$x86regno++;
$reg_nr++;
$reg = sprintf("%s%u%s", $reg_prefix, $reg_nr, $reg_suffix);
} else {
# Not a dashed sequence
die if ($nregs);
}
}
}
($fmt, $file) = @ARGV;
%regs = ();
%regvals = ();
%disclass = ();
open(REGS, "< ${file}") or die "$0: Cannot open $file\n";
while ( defined($line = <REGS>) ) {
$nline++;
chomp $line;
$line =~ s/\s*(\#.*|)$//;
next if ( $line eq '' );
process_line($line);
}
close(REGS);
if ( $fmt eq 'h' ) {
# Output regs.h
print "/* automatically generated from $file - do not edit */\n\n";
$expr_regs = 1;
printf "#define EXPR_REG_START %d\n\n", $expr_regs;
print "enum reg_enum {\n";
# Unfortunately the code uses both 0 and -1 as "no register" in
# different places...
print " R_zero = 0,\n";
print " R_none = -1,\n";
$attach = ' = EXPR_REG_START'; # EXPR_REG_START == 1
foreach $reg ( sort(keys(%regs)) ) {
print " R_\U${reg}\E${attach},\n";
$attach = '';
$expr_regs++;
}
print " REG_ENUM_LIMIT\n";
print "};\n\n";
printf "#define EXPR_REG_END %d\n\n", $expr_regs-1;
foreach $reg ( sort(keys(%regs)) ) {
printf "#define %-15s %2d\n", "REG_NUM_\U${reg}", $regvals{$reg};
}
print "\n";
} elsif ( $fmt eq 'c' ) {
# Output regs.c
print "/* automatically generated from $file - do not edit */\n\n";
print "#include \"tables.h\"\n\n";
print "const char * const nasm_reg_names[] = "; $ch = '{';
# This one has no dummy entry for 0
foreach $reg ( sort(keys(%regs)) ) {
print "$ch\n \"${reg}\"";
$ch = ',';
}
print "\n};\n";
} elsif ( $fmt eq 'fc' ) {
# Output regflags.c
print "/* automatically generated from $file - do not edit */\n\n";
print "#include \"tables.h\"\n";
print "#include \"nasm.h\"\n\n";
print "const int32_t nasm_reg_flags[] = {\n";
printf " 0,\n"; # Dummy entry for 0
foreach $reg ( sort(keys(%regs)) ) {
# Print the class of the register
printf " %-15s /* %-5s */\n",
$regs{$reg}.',', $reg;
}
print "};\n";
} elsif ( $fmt eq 'vc' ) {
# Output regvals.c
print "/* automatically generated from $file - do not edit */\n\n";
print "#include \"tables.h\"\n\n";
print "const int nasm_regvals[] = {\n";
print " -1,\n"; # Dummy entry for 0
foreach $reg ( sort(keys(%regs)) ) {
# Print the x86 value of the register
printf " %2d, /* %-5s */\n", $regvals{$reg}, $reg;
}
print "};\n";
} elsif ( $fmt eq 'dc' ) {
# Output regdis.c
print "/* automatically generated from $file - do not edit */\n\n";
print "#include \"regs.h\"\n";
print "#include \"regdis.h\"\n\n";
foreach $class ( sort(keys(%disclass)) ) {
printf "const enum reg_enum nasm_rd_%-8s[%2d] = {",
$class, scalar @{$disclass{$class}};
@foo = @{$disclass{$class}};
@bar = ();
for ( $i = 0 ; $i < scalar(@foo) ; $i++ ) {
if (defined($foo[$i])) {
push(@bar, "R_\U$foo[$i]\E");
} else {
die "$0: No register name for class $class, value $i\n";
}
}
print join(',', @bar), "};\n";
}
} elsif ( $fmt eq 'dh' ) {
# Output regdis.h
print "/* automatically generated from $file - do not edit */\n";
foreach $class ( sort(keys(%disclass)) ) {
printf "extern const enum reg_enum nasm_rd_%-8s[%2d];\n",
$class, scalar @{$disclass{$class}};
}
} else {
die "$0: Unknown output format\n";
}
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