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#!/usr/bin/perl
#
# macros.pl produce macros.c from standard.mac
#
# The Netwide Assembler is copyright (C) 1996 Simon Tatham and
# Julian Hall. All rights reserved. The software is
# redistributable under the license given in the file "LICENSE"
# distributed in the NASM archive.
require 'phash.ph';
require 'pptok.ph';
use bytes;
my $fname;
my $line = 0;
my $index = 0;
my $tasm_count = 0;
#
# Print out a string as a character array
#
sub charcify(@) {
my $l = '';
my $c, $o;
foreach $o (unpack("C*", join('',@_))) {
$c = pack("C", $o);
if ($o < 32 || $o > 126 || $c eq '"' || $c eq "\\") {
$l .= sprintf("%3d,", $o);
} else {
$l .= "\'".$c."\',";
}
}
return $l;
}
#
# Generate macros.c
#
open(OUT,"> macros.c\0") or die "unable to open macros.c\n";
print OUT "/*\n";
print OUT " * Do not edit - this file auto-generated by macros.pl from:\n";
print OUT " * ", join("\n * ", @ARGV), "\n";
print OUT " */\n";
print OUT "\n";
print OUT "#include \"tables.h\"\n";
print OUT "#include \"nasmlib.h\"\n";
print OUT "#include \"hashtbl.h\"\n";
print OUT "#include \"output/outform.h\"\n";
print OUT "\n";
print OUT "#if 1\n";
print OUT "const unsigned char nasm_stdmac[] = {";
my $npkg = 0;
my @pkg_list = ();
my %pkg_number = ();
my $pkg;
my @out_list = ();
my $outfmt;
my $lastname;
my $z;
foreach $fname ( @ARGV ) {
open(INPUT,"< $fname\0") or die "$0: $fname: $!\n";
while (<INPUT>) {
$line++;
chomp;
while (/^(.*)\\$/) {
$_ = $1;
$_ .= <INPUT>;
chomp;
$line++;
}
if (m/^\s*\*END\*TASM\*MACROS\*\s*$/) {
$tasm_count = $index;
print OUT " /* End of TASM macros */\n";
} elsif (m/^OUT:\s*(.*\S)\s*$/) {
undef $pkg;
my @out_alias = split(/\s+/, $1);
printf OUT " /* %4d */ 0\n", $index++;
print OUT "};\n#endif\n";
$index = 0;
print OUT "\n";
my $pfx = '#if';
foreach my $al (@out_alias) {
print OUT $pfx, " defined(OF_\U${al}\E)";
$pfx = ' ||';
}
printf OUT "\nconst unsigned char %s_stdmac[] = {\n", $out_alias[0];
print OUT " /* From $fname */\n";
$lastname = $fname;
push(@out_list, $out_alias[0]);
$out_index{$out_alias[0]} = $index;
} elsif (m/^USE:\s*(\S+)\s*$/) {
$pkg = $1;
if (defined($pkg_number{$pkg})) {
die "$0: $fname: duplicate package: $pkg\n";
}
printf OUT " /* %4d */ 0\n", $index++;
print OUT "};\n#endif\n";
$index = 0;
print OUT "\n#if 1\n";
printf OUT "static const unsigned char nasm_stdmac_%s[] = {\n", $pkg;
print OUT " /* From $fname */\n";
$lastname = $fname;
push(@pkg_list, $pkg);
$pkg_number{$pkg} = $npkg++;
$z = pack("C", $pptok_hash{'%define'}+128)."__USE_\U$pkg\E__";
printf OUT " /* %4d */ %s0,\n", $index, charcify($z);
$index += length($z)+1;
} elsif (m/^\s*((\s*([^\"\';\s]+|\"[^\"]*\"|\'[^\']*\'))*)\s*(;.*)?$/) {
my $s1, $s2, $pd, $ws;
$s1 = $1;
$s2 = '';
while ($s1 =~ /(\%[a-zA-Z_][a-zA-Z0-9_]*)((\s+)(.*)|)$/) {
$s2 .= "$'";
$pd = $1;
$ws = $3;
$s1 = $4;
if (defined($pptok_hash{$pd}) &&
$pptok_hash{$pd} <= 127) {
$s2 .= pack("C", $pptok_hash{$pd}+128);
} else {
$s2 .= $pd.$ws;
}
}
$s2 .= $s1;
if (length($s2) > 0) {
if ($lastname ne $fname) {
print OUT "\n /* From $fname */\n";
$lastname = $fname;
}
printf OUT " /* %4d */ %s0,\n",
$index, charcify($s2);
$index += length($s2)+1;
}
} else {
die "$fname:$line: error unterminated quote";
}
}
close(INPUT);
}
printf OUT " /* %4d */ 0\n};\n#endif\n\n", $index++;
print OUT "const unsigned char * const nasm_stdmac_after_tasm = ",
"&nasm_stdmac[$tasm_count];\n\n";
my @hashinfo = gen_perfect_hash(\%pkg_number);
if (!@hashinfo) {
die "$0: no hash found\n";
}
# Paranoia...
verify_hash_table(\%pkg_number, \@hashinfo);
my ($n, $sv, $g) = @hashinfo;
die if ($n & ($n-1));
print OUT "const unsigned char *nasm_stdmac_find_package(const char *package)\n";
print OUT "{\n";
print OUT " static const struct {\n";
print OUT " const char *package;\n";
print OUT " const unsigned char *macros;\n";
print OUT " } packages[$npkg] = {\n";
foreach $pkg (@pkg_list) {
printf OUT " { \"%s\", nasm_stdmac_%s },\n",
$pkg, $pkg;
}
print OUT " };\n";
# Put a large value in unused slots. This makes it extremely unlikely
# that any combination that involves unused slot will pass the range test.
# This speeds up rejection of unrecognized tokens, i.e. identifiers.
print OUT "#define UNUSED 16383\n";
print OUT " static const int16_t hash1[$n] = {\n";
for ($i = 0; $i < $n; $i++) {
my $h = ${$g}[$i*2+0];
print OUT " ", defined($h) ? $h : 'UNUSED', ",\n";
}
print OUT " };\n";
print OUT " static const int16_t hash2[$n] = {\n";
for ($i = 0; $i < $n; $i++) {
my $h = ${$g}[$i*2+1];
print OUT " ", defined($h) ? $h : 'UNUSED', ",\n";
}
print OUT " };\n";
print OUT " uint32_t k1, k2;\n";
print OUT " uint64_t crc;\n";
# For correct overflow behavior, "ix" should be unsigned of the same
# width as the hash arrays.
print OUT " uint16_t ix;\n";
print OUT "\n";
printf OUT " crc = crc64i(UINT64_C(0x%08x%08x), package);\n",
$$sv[0], $$sv[1];
print OUT " k1 = (uint32_t)crc;\n";
print OUT " k2 = (uint32_t)(crc >> 32);\n";
print OUT "\n";
printf OUT " ix = hash1[k1 & 0x%x] + hash2[k2 & 0x%x];\n", $n-1, $n-1;
printf OUT " if (ix >= %d)\n", scalar(@pkg_list);
print OUT " return NULL;\n";
print OUT "\n";
print OUT " if (nasm_stricmp(packages[ix].package, package))\n";
print OUT " return NULL;\n";
print OUT "\n";
print OUT " return packages[ix].macros;\n";
print OUT "}\n";
close(OUT);
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