1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
#!/usr/bin/perl
#
# Produce pptok.c, pptok.h and pptok.ph from pptok.dat
#
require 'phash.ph';
my($what, $in, $out) = @ARGV;
#
# Read pptok.dat
#
open(IN, "< $in") or die "$0: cannot open: $in\n";
while (defined($line = <IN>)) {
chomp $line;
$line =~ s/^\s+//; # Remove leading whitespace
$line =~ s/\s*\#.*$//; # Remove comments and trailing whitespace
next if ($line eq '');
if ($line =~ /^\%(.*)\*$/) {
push(@cctok, $1);
} elsif ($line =~ /^\%(.*)$/) {
push(@pptok, $1);
} elsif ($line =~ /^\*(.*)$/) {
push(@cond, $1);
}
}
close(IN);
@cctok = sort @cctok;
@cond = sort @cond;
@pptok = sort @pptok;
# Generate the expanded list including conditionals. The conditionals
# are at the beginning, padded to a power of 2, with the inverses
# interspersed; this allows a simple mask to pick out the condition.
while ((scalar @cond) & (scalar @cond)-1) {
push(@cond, undef);
}
@cptok = ();
foreach $ct (@cctok) {
foreach $cc (@cond) {
if (defined($cc)) {
push(@cptok, $ct.$cc);
push(@cptok, $ct.'n'.$cc);
} else {
push(@cptok, undef, undef);
}
}
}
$first_uncond = $pptok[0];
@pptok = (@cptok, @pptok);
open(OUT, "> $out") or die "$0: cannot open: $out\n";
#
# Output pptok.h
#
if ($what eq 'h') {
print OUT "/* Automatically generated from $in by $0 */\n";
print OUT "/* Do not edit */\n";
print OUT "\n";
print OUT "enum preproc_token {\n";
$n = 0;
foreach $pt (@pptok) {
if (defined($pt)) {
printf OUT " %-16s = %3d,\n", "PP_\U$pt\E", $n;
}
$n++;
}
printf OUT " %-16s = %3d\n", 'PP_INVALID', -1;
print OUT "};\n";
print OUT "\n";
print OUT "enum pp_conditional {\n";
$n = 0;
foreach $cc (@cond) {
if (defined($cc)) {
printf OUT " %-16s = %3d,\n", "PPC_IF\U$cc\E", $n;
}
$n += 2;
}
print OUT "};\n\n";
printf OUT "#define PP_COND(x) ((enum pp_conditional)((x) & 0x%x))\n",
(scalar(@cond)-1) << 1;
print OUT "#define PP_IS_COND(x) ((unsigned int)(x) < PP_\U$first_uncond\E)\n";
print OUT "#define PP_NEGATIVE(x) ((x) & 1)\n";
print OUT "\n";
foreach $ct (@cctok) {
print OUT "#define CASE_PP_\U$ct\E";
$pref = " \\\n";
foreach $cc (@cond) {
if (defined($cc)) {
print OUT "$pref\tcase PP_\U${ct}${cc}\E: \\\n";
print OUT "\tcase PP_\U${ct}N${cc}\E";
$pref = ":\\\n";
}
}
print OUT "\n"; # No colon or newline on the last one
}
}
#
# Output pptok.c
#
if ($what eq 'c') {
print OUT "/* Automatically generated from $in by $0 */\n";
print OUT "/* Do not edit */\n";
print OUT "\n";
my %tokens = ();
my @tokendata = ();
my $n = 0;
foreach $pt (@pptok) {
if (defined($pt)) {
$tokens{'%'.$pt} = $n;
if ($pt =~ /[\@\[\]\\_]/) {
# Fail on characters which look like upper-case letters
# to the quick-and-dirty downcasing in the prehash
# (see below)
die "$in: invalid character in token: $pt";
}
}
$n++;
}
my @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 OUT "#include \"compiler.h\"\n";
print OUT "#include <inttypes.h>\n";
print OUT "#include <ctype.h>\n";
print OUT "#include \"nasmlib.h\"\n";
print OUT "#include \"hashtbl.h\"\n";
print OUT "#include \"preproc.h\"\n";
print OUT "\n";
# Note that this is global.
printf OUT "const char * const pp_directives[%d] = {\n", scalar(@pptok);
foreach $d (@pptok) {
if (defined($d)) {
print OUT " \"%$d\",\n";
} else {
print OUT " NULL,\n";
}
}
print OUT "};\n";
printf OUT "const uint8_t pp_directives_len[%d] = {\n", scalar(@pptok);
foreach $d (@pptok) {
printf OUT " %d,\n", defined($d) ? length($d)+1 : 0;
}
print OUT "};\n";
print OUT "enum preproc_token pp_token_hash(const char *token)\n";
print OUT "{\n";
# Put a large value in unused slots. This makes it extremely unlikely
# that any combination that involves unused slot will pass the range test.
# This speeds up rejection of unrecognized tokens, i.e. identifiers.
print OUT "#define UNUSED 16383\n";
print OUT " static const int16_t hash1[$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), token);\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, $n-1;
printf OUT " if (ix >= %d)\n", scalar(@pptok);
print OUT " return PP_INVALID;\n";
print OUT "\n";
print OUT " if (!pp_directives[ix] || nasm_stricmp(pp_directives[ix], token))\n";
print OUT " return PP_INVALID;\n";
print OUT "\n";
print OUT " return ix;\n";
print OUT "}\n";
}
#
# Output pptok.ph
#
if ($what eq 'ph') {
print OUT "# Automatically generated from $in by $0\n";
print OUT "# Do not edit\n";
print OUT "\n";
print OUT "%pptok_hash = (\n";
$n = 0;
foreach $tok (@pptok) {
if (defined($tok)) {
printf OUT " '%%%s' => %d,\n", $tok, $n;
}
$n++;
}
print OUT ");\n";
print OUT "1;\n";
}
|
