Upstream version 2.08rc7

1 files changed, 275 insertions, 0 deletions

diff --git a/tokhash.pl b/tokhash.pl
new file mode 100755
index 0000000..0c69c03
--- /dev/null
+++ b/tokhash.pl
@@ -0,0 +1,275 @@
+#!/usr/bin/perl
+## --------------------------------------------------------------------------
+##   
+##   Copyright 1996-2009 The NASM Authors - All Rights Reserved
+##   See the file AUTHORS included with the NASM distribution for
+##   the specific copyright holders.
+##
+##   Redistribution and use in source and binary forms, with or without
+##   modification, are permitted provided that the following
+##   conditions are met:
+##
+##   * Redistributions of source code must retain the above copyright
+##     notice, this list of conditions and the following disclaimer.
+##   * Redistributions in binary form must reproduce the above
+##     copyright notice, this list of conditions and the following
+##     disclaimer in the documentation and/or other materials provided
+##     with the distribution.
+##     
+##     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+##     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+##     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+##     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+##     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+##     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+##     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+##     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+##     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+##     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+##     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+##     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+##     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+##
+## --------------------------------------------------------------------------
+
+#
+# Generate a perfect hash for token parsing
+#
+# Usage: tokenhash.pl insns.dat regs.dat tokens.dat
+#
+
+require 'phash.ph';
+
+my($output, $insns_dat, $regs_dat, $tokens_dat) = @ARGV;
+
+%tokens = ();
+@tokendata = ();
+
+#
+# List of condition codes
+#
+@conditions = ('a', 'ae', 'b', 'be', 'c', 'e', 'g', 'ge', 'l', 'le',
+	       'na', 'nae', 'nb', 'nbe', 'nc', 'ne', 'ng', 'nge', 'nl',
+	       'nle', 'no', 'np', 'ns', 'nz', 'o', 'p', 'pe', 'po', 's', 'z');
+
+#
+# Read insns.dat
+#
+open(ID, "< ${insns_dat}") or die "$0: cannot open $insns_dat: $!\n";
+while (defined($line = <ID>)) {
+    if ($line =~ /^([A-Z0-9_]+)(|cc)\s/) {
+	$insn = $1.$2;
+	($token = $1) =~ tr/A-Z/a-z/;
+
+	if ($2 eq '') {
+	    # Single instruction token
+	    if (!defined($tokens{$token})) {
+		$tokens{$token} = scalar @tokendata;
+		push(@tokendata, "\"${token}\", TOKEN_INSN, C_none, I_${insn}");
+	    }
+	} else {
+	    # Conditional instruction
+	    foreach $cc (@conditions) {
+		if (!defined($tokens{$token.$cc})) {
+		    $tokens{$token.$cc} = scalar @tokendata;
+		    push(@tokendata, "\"${token}${cc}\", TOKEN_INSN, C_\U$cc\E, I_${insn}");
+		}
+	    }
+	}
+    }
+}
+close(ID);
+
+#
+# Read regs.dat
+#
+open(RD, "< ${regs_dat}") or die "$0: cannot open $regs_dat: $!\n";
+while (defined($line = <RD>)) {
+    if ($line =~ /^([a-z0-9_-]+)\s/) {
+	$reg = $1;
+
+	if ($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--) {
+	    if (defined($tokens{$reg})) {
+		die "Duplicate definition: $reg\n";
+	    }
+	    $tokens{$reg} = scalar @tokendata;
+	    push(@tokendata, "\"${reg}\", TOKEN_REG, 0, R_\U${reg}\E");
+
+	    if (defined($reg_prefix)) {
+		$reg_nr++;
+		$reg = sprintf("%s%u%s", $reg_prefix, $reg_nr, $reg_suffix);
+	    } else {
+		# Not a dashed sequence
+		die if ($nregs);
+	    }
+	}
+    }
+}
+close(RD);
+
+#
+# Read tokens.dat
+#
+open(TD, "< ${tokens_dat}") or die "$0: cannot open $tokens_dat: $!\n";
+while (defined($line = <TD>)) {
+    if ($line =~ /^\%\s+(.*)$/) {
+	$pattern = $1;
+    } elsif ($line =~ /^([a-z0-9_-]+)/) {
+	$token = $1;
+
+	if (defined($tokens{$token})) {
+	    die "Duplicate definition: $token\n";
+	}
+	$tokens{$token} = scalar @tokendata;
+
+	$data = $pattern;
+	if ($data =~ /^(.*)\{(.*)\}(.*)$/) {
+	    my $head = $1, $tail = $3;
+	    my $px = $2;
+
+	    $px =~ s/\*/(.*)/g;
+	    if ($token =~ /$px/i) {
+		$data = $head."\U$1".$tail;
+	    } else {
+		die "$0: token $token doesn't match $px\n";
+	    }
+	}
+
+	$data =~ s/\*/\U$token/g;
+
+	push(@tokendata, "\"$token\", $data");
+    }
+}
+close(TD);
+
+if ($output eq 'h') {
+    #
+    # tokens.h
+    #
+
+    $max_len = 0;
+    foreach $token (keys(%tokens)) {
+	if (length($token) > $max_len) {
+	    $max_len = length($token);
+	}
+    }
+
+    print "/*\n";
+    print " * This file is generated from insns.dat, regs.dat and token.dat\n";
+    print " * by tokhash.pl; do not edit.\n";
+    print " */\n";
+    print "\n";
+
+    print "#ifndef NASM_TOKENS_H\n";
+    print "#define NASM_TOKENS_H\n";
+    print "\n";
+    print "#define MAX_KEYWORD $max_len /* length of longest keyword */\n";
+    print "\n";
+    print "#endif /* NASM_TOKENS_H */\n";
+} elsif ($output eq 'c') {
+    #
+    # tokhash.c
+    #
+
+    @hashinfo = gen_perfect_hash(\%tokens);
+    if (!defined(@hashinfo)) {
+	die "$0: no hash found\n";
+    }
+
+    # Paranoia...
+    verify_hash_table(\%tokens, \@hashinfo);
+
+    ($n, $sv, $g) = @hashinfo;
+    $sv2 = $sv+2;
+
+    die if ($n & ($n-1));
+
+    print "/*\n";
+    print " * This file is generated from insns.dat, regs.dat and token.dat\n";
+    print " * by tokhash.pl; do not edit.\n";
+    print " */\n";
+    print "\n";
+
+    print "#include \"compiler.h\"\n";
+    print "#include <string.h>\n";
+    print "#include \"nasm.h\"\n";
+    print "#include \"hashtbl.h\"\n";
+    print "#include \"insns.h\"\n";
+    print "\n";
+
+    # These somewhat odd sizes and ordering thereof are due to the
+    # relative ranges of the types; this makes it fit in 16 bytes on
+    # 64-bit machines and 12 bytes on 32-bit machines.
+    print "struct tokendata {\n";
+    print "    const char *string;\n";
+    print "    int16_t tokentype;\n";
+    print "    int16_t aux;\n";
+    print "    int32_t num;\n";
+    print "};\n";
+    print "\n";
+
+    print "int nasm_token_hash(const char *token, struct tokenval *tv)\n";
+    print "{\n";
+
+    # Put a large value in unused slots.  This makes it extremely unlikely
+    # that any combination that involves unused slot will pass the range test.
+    # This speeds up rejection of unrecognized tokens, i.e. identifiers.
+    print "#define UNUSED 16383\n";
+
+    print "    static const int16_t hash1[$n] = {\n";
+    for ($i = 0; $i < $n; $i++) {
+	my $h = ${$g}[$i*2+0];
+	print "        ", defined($h) ? $h : 'UNUSED', ",\n";
+    }
+    print "    };\n";
+
+    print "    static const int16_t hash2[$n] = {\n";
+    for ($i = 0; $i < $n; $i++) {
+	my $h = ${$g}[$i*2+1];
+	print "        ", defined($h) ? $h : 'UNUSED', ",\n";
+    }
+    print "    };\n";
+
+    printf "    static const struct tokendata tokendata[%d] = {\n", scalar(@tokendata);
+    foreach $d (@tokendata) {
+	print "        { ", $d, " },\n";
+    }
+    print  "    };\n";
+
+    print  "    uint32_t k1, k2;\n";
+    print  "    uint64_t crc;\n";
+    # For correct overflow behavior, "ix" should be unsigned of the same
+    # width as the hash arrays.
+    print  "    uint16_t ix;\n";
+    print  "    const struct tokendata *data;\n";
+    print  "\n";
+    printf "    crc = crc64(UINT64_C(0x%08x%08x), token);\n",
+	$$sv[0], $$sv[1];
+    print  "    k1 = (uint32_t)crc;\n";
+    print  "    k2 = (uint32_t)(crc >> 32);\n";
+    print  "\n";
+    printf "    ix = hash1[k1 & 0x%x] + hash2[k2 & 0x%x];\n", $n-1, $n-1;
+    printf "    if (ix >= %d)\n", scalar(@tokendata);
+    print  "        return tv->t_type = TOKEN_ID;\n";
+    print  "\n";
+    print  "    data = &tokendata[ix];\n";
+
+    print  "    if (strcmp(data->string, token))\n";
+    print  "        return tv->t_type = TOKEN_ID;\n";
+    print  "\n";
+    print  "    tv->t_integer = data->num;\n";
+    print  "    tv->t_inttwo  = data->aux;\n";
+    print  "    return tv->t_type = data->tokentype;\n";
+    print  "}\n";
+}