1 %{
2 /* Parser for i386 CPU description.
3 Copyright (C) 2004, 2005, 2007, 2008, 2009 Red Hat, Inc.
4 Written by Ulrich Drepper <drepper@redhat.com>, 2004.
5
6 This file is free software; you can redistribute it and/or modify
7 it under the terms of either
8
9 * the GNU Lesser General Public License as published by the Free
10 Software Foundation; either version 3 of the License, or (at
11 your option) any later version
12
13 or
14
15 * the GNU General Public License as published by the Free
16 Software Foundation; either version 2 of the License, or (at
17 your option) any later version
18
19 or both in parallel, as here.
20
21 elfutils is distributed in the hope that it will be useful, but
22 WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 General Public License for more details.
25
26 You should have received copies of the GNU General Public License and
27 the GNU Lesser General Public License along with this program. If
28 not, see <http://www.gnu.org/licenses/>. */
29
30 #ifdef HAVE_CONFIG_H
31 # include <config.h>
32 #endif
33
34 #include <assert.h>
35 #include <ctype.h>
36 #include <errno.h>
37 #include <inttypes.h>
38 #include <math.h>
39 #include <obstack.h>
40 #include <search.h>
41 #include <stdbool.h>
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <string.h>
45
46 #include <libeu.h>
47 #include <system.h>
48
49 #define obstack_chunk_alloc xmalloc
50 #define obstack_chunk_free free
51
52 /* The error handler. */
53 static void yyerror (const char *s);
54
55 extern int yylex (void);
56 extern int i386_lineno;
57 extern char *infname;
58
59
60 struct known_bitfield
61 {
62 char *name;
63 unsigned long int bits;
64 int tmp;
65 };
66
67
68 struct bitvalue
69 {
70 enum bittype { zeroone, field, failure } type;
71 union
72 {
73 unsigned int value;
74 struct known_bitfield *field;
75 };
76 struct bitvalue *next;
77 };
78
79
80 struct argname
81 {
82 enum nametype { string, nfield } type;
83 union
84 {
85 char *str;
86 struct known_bitfield *field;
87 };
88 struct argname *next;
89 };
90
91
92 struct argument
93 {
94 struct argname *name;
95 struct argument *next;
96 };
97
98
99 struct instruction
100 {
101 /* The byte encoding. */
102 struct bitvalue *bytes;
103
104 /* Prefix possible. */
105 int repe;
106 int rep;
107
108 /* Mnemonic. */
109 char *mnemonic;
110
111 /* Suffix. */
112 enum { suffix_none = 0, suffix_w, suffix_w0, suffix_W, suffix_tttn,
113 suffix_w1, suffix_W1, suffix_D } suffix;
114
115 /* Flag set if modr/m is used. */
116 int modrm;
117
118 /* Operands. */
119 struct operand
120 {
121 char *fct;
122 char *str;
123 int off1;
124 int off2;
125 int off3;
126 } operands[3];
127
128 struct instruction *next;
129 };
130
131
132 struct synonym
133 {
134 char *from;
135 char *to;
136 };
137
138
139 struct suffix
140 {
141 char *name;
142 int idx;
143 };
144
145
146 struct argstring
147 {
148 char *str;
149 int idx;
150 int off;
151 };
152
153
154 static struct known_bitfield ax_reg =
155 {
156 .name = "ax", .bits = 0, .tmp = 0
157 };
158
159 static struct known_bitfield dx_reg =
160 {
161 .name = "dx", .bits = 0, .tmp = 0
162 };
163
164 static struct known_bitfield di_reg =
165 {
166 .name = "es_di", .bits = 0, .tmp = 0
167 };
168
169 static struct known_bitfield si_reg =
170 {
171 .name = "ds_si", .bits = 0, .tmp = 0
172 };
173
174 static struct known_bitfield bx_reg =
175 {
176 .name = "ds_bx", .bits = 0, .tmp = 0
177 };
178
179
180 static int bitfield_compare (const void *p1, const void *p2);
181 static void new_bitfield (char *name, unsigned long int num);
182 static void check_bits (struct bitvalue *value);
183 static int check_duplicates (struct bitvalue *val);
184 static int check_argsdef (struct bitvalue *bitval, struct argument *args);
185 static int check_bitsused (struct bitvalue *bitval,
186 struct known_bitfield *suffix,
187 struct argument *args);
188 static struct argname *combine (struct argname *name);
189 static void fillin_arg (struct bitvalue *bytes, struct argname *name,
190 struct instruction *instr, int n);
191 static void find_numbers (void);
192 static int compare_syn (const void *p1, const void *p2);
193 static int compare_suf (const void *p1, const void *p2);
194 static void instrtable_out (void);
195 #if 0
196 static void create_mnemonic_table (void);
197 #endif
198
199 static void *bitfields;
200 static struct instruction *instructions;
201 static size_t ninstructions;
202 static void *synonyms;
203 static void *suffixes;
204 static int nsuffixes;
205 static void *mnemonics;
206 size_t nmnemonics;
207 extern FILE *outfile;
208
209 /* Number of bits used mnemonics. */
210 #if 0
211 static size_t best_mnemonic_bits;
212 #endif
213 %}
214
215 %union {
216 unsigned long int num;
217 char *str;
218 char ch;
219 struct known_bitfield *field;
220 struct bitvalue *bit;
221 struct argname *name;
222 struct argument *arg;
223 }
224
225 %token kMASK
226 %token kPREFIX
227 %token kSUFFIX
228 %token kSYNONYM
229 %token <str> kID
230 %token <num> kNUMBER
231 %token kPERCPERC
232 %token <str> kBITFIELD
233 %token <ch> kCHAR
234 %token kSPACE
235
236 %type <bit> bit byte bytes
237 %type <field> bitfieldopt
238 %type <name> argcomp arg
239 %type <arg> args optargs
240
241 %defines
242
243 %%
244
245 spec: masks kPERCPERC '\n' instrs
246 {
247 if (error_message_count != 0)
248 error (EXIT_FAILURE, 0,
249 "terminated due to previous error");
250
251 instrtable_out ();
252 }
253 ;
254
255 masks: masks '\n' mask
256 | mask
257 ;
258
259 mask: kMASK kBITFIELD kNUMBER
260 { new_bitfield ($2, $3); }
261 | kPREFIX kBITFIELD
262 { new_bitfield ($2, -1); }
263 | kSUFFIX kBITFIELD
264 { new_bitfield ($2, -2); }
265 | kSYNONYM kBITFIELD kBITFIELD
266 {
267 struct synonym *newp = xmalloc (sizeof (*newp));
268 newp->from = $2;
269 newp->to = $3;
270 if (tfind (newp, &synonyms, compare_syn) != NULL)
271 error (0, 0,
272 "%d: duplicate definition for synonym '%s'",
273 i386_lineno, $2);
274 else if (tsearch ( newp, &synonyms, compare_syn) == NULL)
275 error (EXIT_FAILURE, 0, "tsearch");
276 }
277 |
278 ;
279
280 instrs: instrs '\n' instr
281 | instr
282 ;
283
284 instr: bytes ':' bitfieldopt kID bitfieldopt optargs
285 {
286 if ($3 != NULL && strcmp ($3->name, "RE") != 0
287 && strcmp ($3->name, "R") != 0)
288 {
289 error (0, 0, "%d: only 'R' and 'RE' prefix allowed",
290 i386_lineno - 1);
291 }
292 if (check_duplicates ($1) == 0
293 && check_argsdef ($1, $6) == 0
294 && check_bitsused ($1, $5, $6) == 0)
295 {
296 struct instruction *newp = xcalloc (sizeof (*newp),
297 1);
298 if ($3 != NULL)
299 {
300 if (strcmp ($3->name, "RE") == 0)
301 newp->repe = 1;
302 else if (strcmp ($3->name, "R") == 0)
303 newp->rep = 1;
304 }
305
306 newp->bytes = $1;
307 newp->mnemonic = $4;
308 if (newp->mnemonic != (void *) -1l
309 && tfind ($4, &mnemonics,
310 (int (*)(const void *, const void *)) strcmp) == NULL)
311 {
312 if (tsearch ($4, &mnemonics,
313 (int (*)(const void *, const void *)) strcmp) == NULL)
314 error (EXIT_FAILURE, errno, "tsearch");
315 ++nmnemonics;
316 }
317
318 if ($5 != NULL)
319 {
320 if (strcmp ($5->name, "w") == 0)
321 newp->suffix = suffix_w;
322 else if (strcmp ($5->name, "w0") == 0)
323 newp->suffix = suffix_w0;
324 else if (strcmp ($5->name, "tttn") == 0)
325 newp->suffix = suffix_tttn;
326 else if (strcmp ($5->name, "w1") == 0)
327 newp->suffix = suffix_w1;
328 else if (strcmp ($5->name, "W") == 0)
329 newp->suffix = suffix_W;
330 else if (strcmp ($5->name, "W1") == 0)
331 newp->suffix = suffix_W1;
332 else if (strcmp ($5->name, "D") == 0)
333 newp->suffix = suffix_D;
334 else
335 error (EXIT_FAILURE, 0,
336 "%s: %d: unknown suffix '%s'",
337 infname, i386_lineno - 1, $5->name);
338
339 struct suffix search = { .name = $5->name };
340 if (tfind (&search, &suffixes, compare_suf)
341 == NULL)
342 {
343 struct suffix *ns = xmalloc (sizeof (*ns));
344 ns->name = $5->name;
345 ns->idx = ++nsuffixes;
346 if (tsearch (ns, &suffixes, compare_suf)
347 == NULL)
348 error (EXIT_FAILURE, errno, "tsearch");
349 }
350 }
351
352 struct argument *args = $6;
353 int n = 0;
354 while (args != NULL)
355 {
356 fillin_arg ($1, args->name, newp, n);
357
358 args = args->next;
359 ++n;
360 }
361
362 newp->next = instructions;
363 instructions = newp;
364 ++ninstructions;
365 }
366 }
367 |
368 ;
369
370 bitfieldopt: kBITFIELD
371 {
372 struct known_bitfield search;
373 search.name = $1;
374 struct known_bitfield **res;
375 res = tfind (&search, &bitfields, bitfield_compare);
376 if (res == NULL)
377 {
378 error (0, 0, "%d: unknown bitfield '%s'",
379 i386_lineno, search.name);
380 $$ = NULL;
381 }
382 else
383 $$ = *res;
384 }
385 |
386 { $$ = NULL; }
387 ;
388
389 bytes: bytes ',' byte
390 {
391 check_bits ($3);
392
393 struct bitvalue *runp = $1;
394 while (runp->next != NULL)
395 runp = runp->next;
396 runp->next = $3;
397 $$ = $1;
398 }
399 | byte
400 {
401 check_bits ($1);
402 $$ = $1;
403 }
404 ;
405
406 byte: byte bit
407 {
408 struct bitvalue *runp = $1;
409 while (runp->next != NULL)
410 runp = runp->next;
411 runp->next = $2;
412 $$ = $1;
413 }
414 | bit
415 { $$ = $1; }
416 ;
417
418 bit: '0'
419 {
420 $$ = xmalloc (sizeof (struct bitvalue));
421 $$->type = zeroone;
422 $$->value = 0;
423 $$->next = NULL;
424 }
425 | '1'
426 {
427 $$ = xmalloc (sizeof (struct bitvalue));
428 $$->type = zeroone;
429 $$->value = 1;
430 $$->next = NULL;
431 }
432 | kBITFIELD
433 {
434 $$ = xmalloc (sizeof (struct bitvalue));
435 struct known_bitfield search;
436 search.name = $1;
437 struct known_bitfield **res;
438 res = tfind (&search, &bitfields, bitfield_compare);
439 if (res == NULL)
440 {
441 error (0, 0, "%d: unknown bitfield '%s'",
442 i386_lineno, search.name);
443 $$->type = failure;
444 }
445 else
446 {
447 $$->type = field;
448 $$->field = *res;
449 }
450 $$->next = NULL;
451 }
452 ;
453
454 optargs: kSPACE args
455 { $$ = $2; }
456 |
457 { $$ = NULL; }
458 ;
459
460 args: args ',' arg
461 {
462 struct argument *runp = $1;
463 while (runp->next != NULL)
464 runp = runp->next;
465 runp->next = xmalloc (sizeof (struct argument));
466 runp->next->name = combine ($3);
467 runp->next->next = NULL;
468 $$ = $1;
469 }
470 | arg
471 {
472 $$ = xmalloc (sizeof (struct argument));
473 $$->name = combine ($1);
474 $$->next = NULL;
475 }
476 ;
477
478 arg: arg argcomp
479 {
480 struct argname *runp = $1;
481 while (runp->next != NULL)
482 runp = runp->next;
483 runp->next = $2;
484 $$ = $1;
485 }
486 | argcomp
487 { $$ = $1; }
488 ;
489 argcomp: kBITFIELD
490 {
491 $$ = xmalloc (sizeof (struct argname));
492 $$->type = nfield;
493 $$->next = NULL;
494
495 struct known_bitfield search;
496 search.name = $1;
497 struct known_bitfield **res;
498 res = tfind (&search, &bitfields, bitfield_compare);
499 if (res == NULL)
500 {
501 if (strcmp ($1, "ax") == 0)
502 $$->field = &ax_reg;
503 else if (strcmp ($1, "dx") == 0)
504 $$->field = &dx_reg;
505 else if (strcmp ($1, "es_di") == 0)
506 $$->field = &di_reg;
507 else if (strcmp ($1, "ds_si") == 0)
508 $$->field = &si_reg;
509 else if (strcmp ($1, "ds_bx") == 0)
510 $$->field = &bx_reg;
511 else
512 {
513 error (0, 0, "%d: unknown bitfield '%s'",
514 i386_lineno, search.name);
515 $$->field = NULL;
516 }
517 }
518 else
519 $$->field = *res;
520 }
521 | kCHAR
522 {
523 $$ = xmalloc (sizeof (struct argname));
524 $$->type = string;
525 $$->next = NULL;
526 $$->str = xmalloc (2);
527 $$->str[0] = $1;
528 $$->str[1] = '\0';
529 }
530 | kID
531 {
532 $$ = xmalloc (sizeof (struct argname));
533 $$->type = string;
534 $$->next = NULL;
535 $$->str = $1;
536 }
537 | ':'
538 {
539 $$ = xmalloc (sizeof (struct argname));
540 $$->type = string;
541 $$->next = NULL;
542 $$->str = xmalloc (2);
543 $$->str[0] = ':';
544 $$->str[1] = '\0';
545 }
546 ;
547
548 %%
549
550 static void
551 yyerror (const char *s)
552 {
553 error (0, 0, _("while reading i386 CPU description: %s at line %d"),
554 _(s), i386_lineno);
555 }
556
557
558 static int
bitfield_compare(const void * p1,const void * p2)559 bitfield_compare (const void *p1, const void *p2)
560 {
561 struct known_bitfield *f1 = (struct known_bitfield *) p1;
562 struct known_bitfield *f2 = (struct known_bitfield *) p2;
563
564 return strcmp (f1->name, f2->name);
565 }
566
567
568 static void
new_bitfield(char * name,unsigned long int num)569 new_bitfield (char *name, unsigned long int num)
570 {
571 struct known_bitfield *newp = xmalloc (sizeof (struct known_bitfield));
572 newp->name = name;
573 newp->bits = num;
574 newp->tmp = 0;
575
576 if (tfind (newp, &bitfields, bitfield_compare) != NULL)
577 {
578 error (0, 0, "%d: duplicated definition of bitfield '%s'",
579 i386_lineno, name);
580 free (name);
581 free (newp);
582 return;
583 }
584
585 if (tsearch (newp, &bitfields, bitfield_compare) == NULL)
586 error (EXIT_FAILURE, errno, "%d: cannot insert new bitfield '%s'",
587 i386_lineno, name);
588 }
589
590
591 /* Check that the number of bits is a multiple of 8. */
592 static void
check_bits(struct bitvalue * val)593 check_bits (struct bitvalue *val)
594 {
595 struct bitvalue *runp = val;
596 unsigned int total = 0;
597
598 while (runp != NULL)
599 {
600 if (runp->type == zeroone)
601 ++total;
602 else if (runp->field == NULL)
603 /* No sense doing anything, the field is not known. */
604 return;
605 else
606 total += runp->field->bits;
607
608 runp = runp->next;
609 }
610
611 if (total % 8 != 0)
612 {
613 struct obstack os;
614 obstack_init (&os);
615
616 while (val != NULL)
617 {
618 if (val->type == zeroone)
619 obstack_printf (&os, "%u", val->value);
620 else
621 obstack_printf (&os, "{%s}", val->field->name);
622 val = val->next;
623 }
624 obstack_1grow (&os, '\0');
625
626 error (0, 0, "%d: field '%s' not a multiple of 8 bits in size",
627 i386_lineno, (char *) obstack_finish (&os));
628
629 obstack_free (&os, NULL);
630 }
631 }
632
633
634 static int
check_duplicates(struct bitvalue * val)635 check_duplicates (struct bitvalue *val)
636 {
637 static int testcnt;
638 ++testcnt;
639
640 int result = 0;
641 while (val != NULL)
642 {
643 if (val->type == field && val->field != NULL)
644 {
645 if (val->field->tmp == testcnt)
646 {
647 error (0, 0, "%d: bitfield '%s' used more than once",
648 i386_lineno - 1, val->field->name);
649 result = 1;
650 }
651 val->field->tmp = testcnt;
652 }
653
654 val = val->next;
655 }
656
657 return result;
658 }
659
660
661 static int
check_argsdef(struct bitvalue * bitval,struct argument * args)662 check_argsdef (struct bitvalue *bitval, struct argument *args)
663 {
664 int result = 0;
665
666 while (args != NULL)
667 {
668 for (struct argname *name = args->name; name != NULL; name = name->next)
669 if (name->type == nfield && name->field != NULL
670 && name->field != &ax_reg && name->field != &dx_reg
671 && name->field != &di_reg && name->field != &si_reg
672 && name->field != &bx_reg)
673 {
674 struct bitvalue *runp = bitval;
675
676 while (runp != NULL)
677 if (runp->type == field && runp->field == name->field)
678 break;
679 else
680 runp = runp->next;
681
682 if (runp == NULL)
683 {
684 error (0, 0, "%d: unknown bitfield '%s' used in output format",
685 i386_lineno - 1, name->field->name);
686 result = 1;
687 }
688 }
689
690 args = args->next;
691 }
692
693 return result;
694 }
695
696
697 static int
check_bitsused(struct bitvalue * bitval,struct known_bitfield * suffix,struct argument * args)698 check_bitsused (struct bitvalue *bitval, struct known_bitfield *suffix,
699 struct argument *args)
700 {
701 int result = 0;
702
703 while (bitval != NULL)
704 {
705 if (bitval->type == field && bitval->field != NULL
706 && bitval->field != suffix
707 /* {w} is handled special. */
708 && strcmp (bitval->field->name, "w") != 0)
709 {
710 struct argument *runp;
711 for (runp = args; runp != NULL; runp = runp->next)
712 {
713 struct argname *name = runp->name;
714
715 while (name != NULL)
716 if (name->type == nfield && name->field == bitval->field)
717 break;
718 else
719 name = name->next;
720
721 if (name != NULL)
722 break;
723 }
724
725 #if 0
726 if (runp == NULL)
727 {
728 error (0, 0, "%d: bitfield '%s' not used",
729 i386_lineno - 1, bitval->field->name);
730 result = 1;
731 }
732 #endif
733 }
734
735 bitval = bitval->next;
736 }
737
738 return result;
739 }
740
741
742 static struct argname *
combine(struct argname * name)743 combine (struct argname *name)
744 {
745 struct argname *last_str = NULL;
746 for (struct argname *runp = name; runp != NULL; runp = runp->next)
747 {
748 if (runp->type == string)
749 {
750 if (last_str == NULL)
751 last_str = runp;
752 else
753 {
754 last_str->str = xrealloc (last_str->str,
755 strlen (last_str->str)
756 + strlen (runp->str) + 1);
757 strcat (last_str->str, runp->str);
758 last_str->next = runp->next;
759 }
760 }
761 else
762 last_str = NULL;
763 }
764 return name;
765 }
766
767
768 #define obstack_grow_str(ob, str) obstack_grow (ob, str, strlen (str))
769
770
771 static void
fillin_arg(struct bitvalue * bytes,struct argname * name,struct instruction * instr,int n)772 fillin_arg (struct bitvalue *bytes, struct argname *name,
773 struct instruction *instr, int n)
774 {
775 static struct obstack ob;
776 static int initialized;
777 if (! initialized)
778 {
779 initialized = 1;
780 obstack_init (&ob);
781 }
782
783 struct argname *runp = name;
784 int cnt = 0;
785 while (runp != NULL)
786 {
787 /* We ignore strings in the function name. */
788 if (runp->type == string)
789 {
790 if (instr->operands[n].str != NULL)
791 error (EXIT_FAILURE, 0,
792 "%d: cannot have more than one string parameter",
793 i386_lineno - 1);
794
795 instr->operands[n].str = runp->str;
796 }
797 else
798 {
799 assert (runp->type == nfield);
800
801 /* Construct the function name. */
802 if (cnt++ > 0)
803 obstack_1grow (&ob, '$');
804
805 if (runp->field == NULL)
806 /* Add some string which contains invalid characters. */
807 obstack_grow_str (&ob, "!!!INVALID!!!");
808 else
809 {
810 char *fieldname = runp->field->name;
811
812 struct synonym search = { .from = fieldname };
813
814 struct synonym **res = tfind (&search, &synonyms, compare_syn);
815 if (res != NULL)
816 fieldname = (*res)->to;
817
818 obstack_grow_str (&ob, fieldname);
819 }
820
821 /* Now compute the bit offset of the field. */
822 struct bitvalue *b = bytes;
823 int bitoff = 0;
824 if (runp->field != NULL)
825 while (b != NULL)
826 {
827 if (b->type == field && b->field != NULL)
828 {
829 if (strcmp (b->field->name, runp->field->name) == 0)
830 break;
831 bitoff += b->field->bits;
832 }
833 else
834 ++bitoff;
835
836 b = b->next;
837 }
838 if (instr->operands[n].off1 == 0)
839 instr->operands[n].off1 = bitoff;
840 else if (instr->operands[n].off2 == 0)
841 instr->operands[n].off2 = bitoff;
842 else if (instr->operands[n].off3 == 0)
843 instr->operands[n].off3 = bitoff;
844 else
845 error (EXIT_FAILURE, 0,
846 "%d: cannot have more than three fields in parameter",
847 i386_lineno - 1);
848
849 if (runp->field != NULL
850 && strncasecmp (runp->field->name, "mod", 3) == 0)
851 instr->modrm = 1;
852 }
853
854 runp = runp->next;
855 }
856 if (obstack_object_size (&ob) == 0)
857 obstack_grow_str (&ob, "string");
858 obstack_1grow (&ob, '\0');
859 char *fct = obstack_finish (&ob);
860
861 instr->operands[n].fct = fct;
862 }
863
864
865 #if 0
866 static void
867 nameout (const void *nodep, VISIT value, int level)
868 {
869 if (value == leaf || value == postorder)
870 printf (" %s\n", *(const char **) nodep);
871 }
872 #endif
873
874
875 static int
compare_argstring(const void * p1,const void * p2)876 compare_argstring (const void *p1, const void *p2)
877 {
878 const struct argstring *a1 = (const struct argstring *) p1;
879 const struct argstring *a2 = (const struct argstring *) p2;
880
881 return strcmp (a1->str, a2->str);
882 }
883
884
885 static int maxoff[3][3];
886 static int minoff[3][3] = { { 1000, 1000, 1000 },
887 { 1000, 1000, 1000 },
888 { 1000, 1000, 1000 } };
889 static int nbitoff[3][3];
890 static void *fct_names[3];
891 static int nbitfct[3];
892 static int nbitsuf;
893 static void *strs[3];
894 static int nbitstr[3];
895 static int total_bits = 2; // Already counted the rep/repe bits.
896
897 static void
find_numbers(void)898 find_numbers (void)
899 {
900 int nfct_names[3] = { 0, 0, 0 };
901 int nstrs[3] = { 0, 0, 0 };
902
903 /* We reverse the order of the instruction list while processing it.
904 Later phases need it in the order in which the input file has
905 them. */
906 struct instruction *reversed = NULL;
907
908 struct instruction *runp = instructions;
909 while (runp != NULL)
910 {
911 for (int i = 0; i < 3; ++i)
912 if (runp->operands[i].fct != NULL)
913 {
914 struct argstring search = { .str = runp->operands[i].fct };
915 if (tfind (&search, &fct_names[i], compare_argstring) == NULL)
916 {
917 struct argstring *newp = xmalloc (sizeof (*newp));
918 newp->str = runp->operands[i].fct;
919 newp->idx = 0;
920 if (tsearch (newp, &fct_names[i], compare_argstring) == NULL)
921 error (EXIT_FAILURE, errno, "tsearch");
922 ++nfct_names[i];
923 }
924
925 if (runp->operands[i].str != NULL)
926 {
927 search.str = runp->operands[i].str;
928 if (tfind (&search, &strs[i], compare_argstring) == NULL)
929 {
930 struct argstring *newp = xmalloc (sizeof (*newp));
931 newp->str = runp->operands[i].str;
932 newp->idx = 0;
933 if (tsearch (newp, &strs[i], compare_argstring) == NULL)
934 error (EXIT_FAILURE, errno, "tsearch");
935 ++nstrs[i];
936 }
937 }
938
939 maxoff[i][0] = MAX (maxoff[i][0], runp->operands[i].off1);
940 maxoff[i][1] = MAX (maxoff[i][1], runp->operands[i].off2);
941 maxoff[i][2] = MAX (maxoff[i][2], runp->operands[i].off3);
942
943 if (runp->operands[i].off1 > 0)
944 minoff[i][0] = MIN (minoff[i][0], runp->operands[i].off1);
945 if (runp->operands[i].off2 > 0)
946 minoff[i][1] = MIN (minoff[i][1], runp->operands[i].off2);
947 if (runp->operands[i].off3 > 0)
948 minoff[i][2] = MIN (minoff[i][2], runp->operands[i].off3);
949 }
950
951 struct instruction *old = runp;
952 runp = runp->next;
953
954 old->next = reversed;
955 reversed = old;
956 }
957 instructions = reversed;
958
959 int d;
960 int c;
961 for (int i = 0; i < 3; ++i)
962 {
963 // printf ("min1 = %d, min2 = %d, min3 = %d\n", minoff[i][0], minoff[i][1], minoff[i][2]);
964 // printf ("max1 = %d, max2 = %d, max3 = %d\n", maxoff[i][0], maxoff[i][1], maxoff[i][2]);
965
966 if (minoff[i][0] == 1000)
967 nbitoff[i][0] = 0;
968 else
969 {
970 nbitoff[i][0] = 1;
971 d = maxoff[i][0] - minoff[i][0];
972 c = 1;
973 while (c < d)
974 {
975 ++nbitoff[i][0];
976 c *= 2;
977 }
978 total_bits += nbitoff[i][0];
979 }
980
981 if (minoff[i][1] == 1000)
982 nbitoff[i][1] = 0;
983 else
984 {
985 nbitoff[i][1] = 1;
986 d = maxoff[i][1] - minoff[i][1];
987 c = 1;
988 while (c < d)
989 {
990 ++nbitoff[i][1];
991 c *= 2;
992 }
993 total_bits += nbitoff[i][1];
994 }
995
996 if (minoff[i][2] == 1000)
997 nbitoff[i][2] = 0;
998 else
999 {
1000 nbitoff[i][2] = 1;
1001 d = maxoff[i][2] - minoff[i][2];
1002 c = 1;
1003 while (c < d)
1004 {
1005 ++nbitoff[i][2];
1006 c *= 2;
1007 }
1008 total_bits += nbitoff[i][2];
1009 }
1010 // printf ("off1 = %d, off2 = %d, off3 = %d\n", nbitoff[i][0], nbitoff[i][1], nbitoff[i][2]);
1011
1012 nbitfct[i] = 1;
1013 d = nfct_names[i];
1014 c = 1;
1015 while (c < d)
1016 {
1017 ++nbitfct[i];
1018 c *= 2;
1019 }
1020 total_bits += nbitfct[i];
1021 // printf ("%d fct[%d], %d bits\n", nfct_names[i], i, nbitfct[i]);
1022
1023 if (nstrs[i] != 0)
1024 {
1025 nbitstr[i] = 1;
1026 d = nstrs[i];
1027 c = 1;
1028 while (c < d)
1029 {
1030 ++nbitstr[i];
1031 c *= 2;
1032 }
1033 total_bits += nbitstr[i];
1034 }
1035
1036 // twalk (fct_names[i], nameout);
1037 }
1038
1039 nbitsuf = 0;
1040 d = nsuffixes;
1041 c = 1;
1042 while (c < d)
1043 {
1044 ++nbitsuf;
1045 c *= 2;
1046 }
1047 total_bits += nbitsuf;
1048 // printf ("%d suffixes, %d bits\n", nsuffixes, nbitsuf);
1049 }
1050
1051
1052 static int
compare_syn(const void * p1,const void * p2)1053 compare_syn (const void *p1, const void *p2)
1054 {
1055 const struct synonym *s1 = (const struct synonym *) p1;
1056 const struct synonym *s2 = (const struct synonym *) p2;
1057
1058 return strcmp (s1->from, s2->from);
1059 }
1060
1061
1062 static int
compare_suf(const void * p1,const void * p2)1063 compare_suf (const void *p1, const void *p2)
1064 {
1065 const struct suffix *s1 = (const struct suffix *) p1;
1066 const struct suffix *s2 = (const struct suffix *) p2;
1067
1068 return strcmp (s1->name, s2->name);
1069 }
1070
1071
1072 static int count_op_str;
1073 static int off_op_str;
1074 static void
print_op_str(const void * nodep,VISIT value,int level)1075 print_op_str (const void *nodep, VISIT value,
1076 int level __attribute__ ((unused)))
1077 {
1078 if (value == leaf || value == postorder)
1079 {
1080 const char *str = (*(struct argstring **) nodep)->str;
1081 fprintf (outfile, "%s\n \"%s",
1082 count_op_str == 0 ? "" : "\\0\"", str);
1083 (*(struct argstring **) nodep)->idx = ++count_op_str;
1084 (*(struct argstring **) nodep)->off = off_op_str;
1085 off_op_str += strlen (str) + 1;
1086 }
1087 }
1088
1089
1090 static void
print_op_str_idx(const void * nodep,VISIT value,int level)1091 print_op_str_idx (const void *nodep, VISIT value,
1092 int level __attribute__ ((unused)))
1093 {
1094 if (value == leaf || value == postorder)
1095 printf (" %d,\n", (*(struct argstring **) nodep)->off);
1096 }
1097
1098
1099 static void
print_op_fct(const void * nodep,VISIT value,int level)1100 print_op_fct (const void *nodep, VISIT value,
1101 int level __attribute__ ((unused)))
1102 {
1103 if (value == leaf || value == postorder)
1104 {
1105 fprintf (outfile, " FCT_%s,\n", (*(struct argstring **) nodep)->str);
1106 (*(struct argstring **) nodep)->idx = ++count_op_str;
1107 }
1108 }
1109
1110
1111 #if NMNES < 2
1112 # error "bogus NMNES value"
1113 #endif
1114
1115 static void
instrtable_out(void)1116 instrtable_out (void)
1117 {
1118 find_numbers ();
1119
1120 #if 0
1121 create_mnemonic_table ();
1122
1123 fprintf (outfile, "#define MNEMONIC_BITS %zu\n", best_mnemonic_bits);
1124 #else
1125 fprintf (outfile, "#define MNEMONIC_BITS %ld\n",
1126 lrint (ceil (log2 (NMNES))));
1127 #endif
1128 fprintf (outfile, "#define SUFFIX_BITS %d\n", nbitsuf);
1129 for (int i = 0; i < 3; ++i)
1130 {
1131 fprintf (outfile, "#define FCT%d_BITS %d\n", i + 1, nbitfct[i]);
1132 if (nbitstr[i] != 0)
1133 fprintf (outfile, "#define STR%d_BITS %d\n", i + 1, nbitstr[i]);
1134 fprintf (outfile, "#define OFF%d_1_BITS %d\n", i + 1, nbitoff[i][0]);
1135 fprintf (outfile, "#define OFF%d_1_BIAS %d\n", i + 1, minoff[i][0]);
1136 if (nbitoff[i][1] != 0)
1137 {
1138 fprintf (outfile, "#define OFF%d_2_BITS %d\n", i + 1, nbitoff[i][1]);
1139 fprintf (outfile, "#define OFF%d_2_BIAS %d\n", i + 1, minoff[i][1]);
1140 }
1141 if (nbitoff[i][2] != 0)
1142 {
1143 fprintf (outfile, "#define OFF%d_3_BITS %d\n", i + 1, nbitoff[i][2]);
1144 fprintf (outfile, "#define OFF%d_3_BIAS %d\n", i + 1, minoff[i][2]);
1145 }
1146 }
1147
1148 fputs ("\n#include <i386_data.h>\n\n", outfile);
1149
1150
1151 #define APPEND(a, b) APPEND_ (a, b)
1152 #define APPEND_(a, b) a##b
1153 #define EMIT_SUFFIX(suf) \
1154 fprintf (outfile, "#define suffix_%s %d\n", #suf, APPEND (suffix_, suf))
1155 EMIT_SUFFIX (none);
1156 EMIT_SUFFIX (w);
1157 EMIT_SUFFIX (w0);
1158 EMIT_SUFFIX (W);
1159 EMIT_SUFFIX (tttn);
1160 EMIT_SUFFIX (D);
1161 EMIT_SUFFIX (w1);
1162 EMIT_SUFFIX (W1);
1163
1164 fputc_unlocked ('\n', outfile);
1165
1166 for (int i = 0; i < 3; ++i)
1167 {
1168 /* Functions. */
1169 count_op_str = 0;
1170 fprintf (outfile, "static const opfct_t op%d_fct[] =\n{\n NULL,\n",
1171 i + 1);
1172 twalk (fct_names[i], print_op_fct);
1173 fputs ("};\n", outfile);
1174
1175 /* The operand strings. */
1176 if (nbitstr[i] != 0)
1177 {
1178 count_op_str = 0;
1179 off_op_str = 0;
1180 fprintf (outfile, "static const char op%d_str[] =", i + 1);
1181 twalk (strs[i], print_op_str);
1182 fputs ("\";\n", outfile);
1183
1184 fprintf (outfile, "static const uint8_t op%d_str_idx[] = {\n",
1185 i + 1);
1186 twalk (strs[i], print_op_str_idx);
1187 fputs ("};\n", outfile);
1188 }
1189 }
1190
1191
1192 fputs ("static const struct instr_enc instrtab[] =\n{\n", outfile);
1193 struct instruction *instr;
1194 for (instr = instructions; instr != NULL; instr = instr->next)
1195 {
1196 fputs (" {", outfile);
1197 if (instr->mnemonic == (void *) -1l)
1198 fputs (" .mnemonic = MNE_INVALID,", outfile);
1199 else
1200 fprintf (outfile, " .mnemonic = MNE_%s,", instr->mnemonic);
1201 fprintf (outfile, " .rep = %d,", instr->rep);
1202 fprintf (outfile, " .repe = %d,", instr->repe);
1203 fprintf (outfile, " .suffix = %d,", instr->suffix);
1204 fprintf (outfile, " .modrm = %d,", instr->modrm);
1205
1206 for (int i = 0; i < 3; ++i)
1207 {
1208 int idx = 0;
1209 if (instr->operands[i].fct != NULL)
1210 {
1211 struct argstring search = { .str = instr->operands[i].fct };
1212 struct argstring **res = tfind (&search, &fct_names[i],
1213 compare_argstring);
1214 assert (res != NULL);
1215 idx = (*res)->idx;
1216 }
1217 fprintf (outfile, " .fct%d = %d,", i + 1, idx);
1218
1219 idx = 0;
1220 if (instr->operands[i].str != NULL)
1221 {
1222 struct argstring search = { .str = instr->operands[i].str };
1223 struct argstring **res = tfind (&search, &strs[i],
1224 compare_argstring);
1225 assert (res != NULL);
1226 idx = (*res)->idx;
1227 }
1228 if (nbitstr[i] != 0)
1229 fprintf (outfile, " .str%d = %d,", i + 1, idx);
1230
1231 fprintf (outfile, " .off%d_1 = %d,", i + 1,
1232 MAX (0, instr->operands[i].off1 - minoff[i][0]));
1233
1234 if (nbitoff[i][1] != 0)
1235 fprintf (outfile, " .off%d_2 = %d,", i + 1,
1236 MAX (0, instr->operands[i].off2 - minoff[i][1]));
1237
1238 if (nbitoff[i][2] != 0)
1239 fprintf (outfile, " .off%d_3 = %d,", i + 1,
1240 MAX (0, instr->operands[i].off3 - minoff[i][2]));
1241 }
1242
1243 fputs (" },\n", outfile);
1244 }
1245 fputs ("};\n", outfile);
1246
1247 fputs ("static const uint8_t match_data[] =\n{\n", outfile);
1248 size_t cnt = 0;
1249 for (instr = instructions; instr != NULL; instr = instr->next, ++cnt)
1250 {
1251 /* First count the number of bytes. */
1252 size_t totalbits = 0;
1253 size_t zerobits = 0;
1254 bool leading_p = true;
1255 size_t leadingbits = 0;
1256 struct bitvalue *b = instr->bytes;
1257 while (b != NULL)
1258 {
1259 if (b->type == zeroone)
1260 {
1261 ++totalbits;
1262 zerobits = 0;
1263 if (leading_p)
1264 ++leadingbits;
1265 }
1266 else
1267 {
1268 totalbits += b->field->bits;
1269 /* We must always count the mod/rm byte. */
1270 if (strncasecmp (b->field->name, "mod", 3) == 0)
1271 zerobits = 0;
1272 else
1273 zerobits += b->field->bits;
1274 leading_p = false;
1275 }
1276 b = b->next;
1277 }
1278 size_t nbytes = (totalbits - zerobits + 7) / 8;
1279 assert (nbytes > 0);
1280 size_t leadingbytes = leadingbits / 8;
1281
1282 fprintf (outfile, " %#zx,", nbytes | (leadingbytes << 4));
1283
1284 /* Now create the mask and byte values. */
1285 uint8_t byte = 0;
1286 uint8_t mask = 0;
1287 int nbits = 0;
1288 b = instr->bytes;
1289 while (b != NULL)
1290 {
1291 if (b->type == zeroone)
1292 {
1293 byte = (byte << 1) | b->value;
1294 mask = (mask << 1) | 1;
1295 if (++nbits == 8)
1296 {
1297 if (leadingbytes > 0)
1298 {
1299 assert (mask == 0xff);
1300 fprintf (outfile, " %#" PRIx8 ",", byte);
1301 --leadingbytes;
1302 }
1303 else
1304 fprintf (outfile, " %#" PRIx8 ", %#" PRIx8 ",",
1305 mask, byte);
1306 byte = mask = nbits = 0;
1307 if (--nbytes == 0)
1308 break;
1309 }
1310 }
1311 else
1312 {
1313 assert (leadingbytes == 0);
1314
1315 unsigned long int remaining = b->field->bits;
1316 while (nbits + remaining > 8)
1317 {
1318 fprintf (outfile, " %#" PRIx8 ", %#" PRIx8 ",",
1319 mask << (8 - nbits), byte << (8 - nbits));
1320 remaining = nbits + remaining - 8;
1321 byte = mask = nbits = 0;
1322 if (--nbytes == 0)
1323 break;
1324 }
1325 byte <<= remaining;
1326 mask <<= remaining;
1327 nbits += remaining;
1328 if (nbits == 8)
1329 {
1330 fprintf (outfile, " %#" PRIx8 ", %#" PRIx8 ",", mask, byte);
1331 byte = mask = nbits = 0;
1332 if (--nbytes == 0)
1333 break;
1334 }
1335 }
1336 b = b->next;
1337 }
1338
1339 fputc_unlocked ('\n', outfile);
1340 }
1341 fputs ("};\n", outfile);
1342 }
1343
1344
1345 #if 0
1346 static size_t mnemonic_maxlen;
1347 static size_t mnemonic_minlen;
1348 static size_t
1349 which_chars (const char *str[], size_t nstr)
1350 {
1351 char used_char[256];
1352 memset (used_char, '\0', sizeof (used_char));
1353 mnemonic_maxlen = 0;
1354 mnemonic_minlen = 10000;
1355 for (size_t cnt = 0; cnt < nstr; ++cnt)
1356 {
1357 const unsigned char *cp = (const unsigned char *) str[cnt];
1358 mnemonic_maxlen = MAX (mnemonic_maxlen, strlen ((char *) cp));
1359 mnemonic_minlen = MIN (mnemonic_minlen, strlen ((char *) cp));
1360 do
1361 used_char[*cp++] = 1;
1362 while (*cp != '\0');
1363 }
1364 size_t nused_char = 0;
1365 for (size_t cnt = 0; cnt < 256; ++cnt)
1366 if (used_char[cnt] != 0)
1367 ++nused_char;
1368 return nused_char;
1369 }
1370
1371
1372 static const char **mnemonic_strs;
1373 static size_t nmnemonic_strs;
1374 static void
1375 add_mnemonics (const void *nodep, VISIT value,
1376 int level __attribute__ ((unused)))
1377 {
1378 if (value == leaf || value == postorder)
1379 mnemonic_strs[nmnemonic_strs++] = *(const char **) nodep;
1380 }
1381
1382
1383 struct charfreq
1384 {
1385 char ch;
1386 int freq;
1387 };
1388 static struct charfreq pfxfreq[256];
1389 static struct charfreq sfxfreq[256];
1390
1391
1392 static int
1393 compare_freq (const void *p1, const void *p2)
1394 {
1395 const struct charfreq *c1 = (const struct charfreq *) p1;
1396 const struct charfreq *c2 = (const struct charfreq *) p2;
1397
1398 if (c1->freq > c2->freq)
1399 return -1;
1400 if (c1->freq < c2->freq)
1401 return 1;
1402 return 0;
1403 }
1404
1405
1406 static size_t
1407 compute_pfxfreq (const char *str[], size_t nstr)
1408 {
1409 memset (pfxfreq, '\0', sizeof (pfxfreq));
1410
1411 for (size_t i = 0; i < nstr; ++i)
1412 pfxfreq[i].ch = i;
1413
1414 for (size_t i = 0; i < nstr; ++i)
1415 ++pfxfreq[*((const unsigned char *) str[i])].freq;
1416
1417 qsort (pfxfreq, 256, sizeof (struct charfreq), compare_freq);
1418
1419 size_t n = 0;
1420 while (n < 256 && pfxfreq[n].freq != 0)
1421 ++n;
1422 return n;
1423 }
1424
1425
1426 struct strsnlen
1427 {
1428 const char *str;
1429 size_t len;
1430 };
1431
1432 static size_t
1433 compute_sfxfreq (size_t nstr, struct strsnlen *strsnlen)
1434 {
1435 memset (sfxfreq, '\0', sizeof (sfxfreq));
1436
1437 for (size_t i = 0; i < nstr; ++i)
1438 sfxfreq[i].ch = i;
1439
1440 for (size_t i = 0; i < nstr; ++i)
1441 ++sfxfreq[((const unsigned char *) strchrnul (strsnlen[i].str, '\0'))[-1]].freq;
1442
1443 qsort (sfxfreq, 256, sizeof (struct charfreq), compare_freq);
1444
1445 size_t n = 0;
1446 while (n < 256 && sfxfreq[n].freq != 0)
1447 ++n;
1448 return n;
1449 }
1450
1451
1452 static void
1453 create_mnemonic_table (void)
1454 {
1455 mnemonic_strs = xmalloc (nmnemonics * sizeof (char *));
1456
1457 twalk (mnemonics, add_mnemonics);
1458
1459 (void) which_chars (mnemonic_strs, nmnemonic_strs);
1460
1461 size_t best_so_far = 100000000;
1462 char *best_prefix = NULL;
1463 char *best_suffix = NULL;
1464 char *best_table = NULL;
1465 size_t best_table_size = 0;
1466 size_t best_table_bits = 0;
1467 size_t best_prefix_bits = 0;
1468
1469 /* We can precompute the prefix characters. */
1470 size_t npfx_char = compute_pfxfreq (mnemonic_strs, nmnemonic_strs);
1471
1472 /* Compute best size for string representation including explicit NUL. */
1473 for (size_t pfxbits = 0; (1u << pfxbits) < 2 * npfx_char; ++pfxbits)
1474 {
1475 char prefix[1 << pfxbits];
1476 size_t i;
1477 for (i = 0; i < (1u << pfxbits) - 1; ++i)
1478 prefix[i] = pfxfreq[i].ch;
1479 prefix[i] = '\0';
1480
1481 struct strsnlen strsnlen[nmnemonic_strs];
1482
1483 for (i = 0; i < nmnemonic_strs; ++i)
1484 {
1485 if (strchr (prefix, *mnemonic_strs[i]) != NULL)
1486 strsnlen[i].str = mnemonic_strs[i] + 1;
1487 else
1488 strsnlen[i].str = mnemonic_strs[i];
1489 strsnlen[i].len = strlen (strsnlen[i].str);
1490 }
1491
1492 /* With the prefixes gone, try to combine strings. */
1493 size_t nstrsnlen = 1;
1494 for (i = 1; i < nmnemonic_strs; ++i)
1495 {
1496 size_t j;
1497 for (j = 0; j < nstrsnlen; ++j)
1498 if (strsnlen[i].len > strsnlen[j].len
1499 && strcmp (strsnlen[j].str,
1500 strsnlen[i].str + (strsnlen[i].len
1501 - strsnlen[j].len)) == 0)
1502 {
1503 strsnlen[j] = strsnlen[i];
1504 break;
1505 }
1506 else if (strsnlen[i].len < strsnlen[j].len
1507 && strcmp (strsnlen[i].str,
1508 strsnlen[j].str + (strsnlen[j].len
1509 - strsnlen[i].len)) == 0)
1510 break;
1511 ;
1512 if (j == nstrsnlen)
1513 strsnlen[nstrsnlen++] = strsnlen[i];
1514 }
1515
1516 size_t nsfx_char = compute_sfxfreq (nstrsnlen, strsnlen);
1517
1518 for (size_t sfxbits = 0; (1u << sfxbits) < 2 * nsfx_char; ++sfxbits)
1519 {
1520 char suffix[1 << sfxbits];
1521
1522 for (i = 0; i < (1u << sfxbits) - 1; ++i)
1523 suffix[i] = sfxfreq[i].ch;
1524 suffix[i] = '\0';
1525
1526 size_t newlen[nstrsnlen];
1527
1528 for (i = 0; i < nstrsnlen; ++i)
1529 if (strchr (suffix, strsnlen[i].str[strsnlen[i].len - 1]) != NULL)
1530 newlen[i] = strsnlen[i].len - 1;
1531 else
1532 newlen[i] = strsnlen[i].len;
1533
1534 char charused[256];
1535 memset (charused, '\0', sizeof (charused));
1536 size_t ncharused = 0;
1537
1538 const char *tablestr[nstrsnlen];
1539 size_t ntablestr = 1;
1540 tablestr[0] = strsnlen[0].str;
1541 size_t table = newlen[0] + 1;
1542 for (i = 1; i < nstrsnlen; ++i)
1543 {
1544 size_t j;
1545 for (j = 0; j < ntablestr; ++j)
1546 if (newlen[i] > newlen[j]
1547 && memcmp (tablestr[j],
1548 strsnlen[i].str + (newlen[i] - newlen[j]),
1549 newlen[j]) == 0)
1550 {
1551 table += newlen[i] - newlen[j];
1552 tablestr[j] = strsnlen[i].str;
1553 newlen[j] = newlen[i];
1554 break;
1555 }
1556 else if (newlen[i] < newlen[j]
1557 && memcmp (strsnlen[i].str,
1558 tablestr[j] + (newlen[j] - newlen[i]),
1559 newlen[i]) == 0)
1560 break;
1561
1562 if (j == ntablestr)
1563 {
1564 table += newlen[i] + 1;
1565 tablestr[ntablestr] = strsnlen[i].str;
1566 newlen[ntablestr] = newlen[i];
1567
1568 ++ntablestr;
1569 }
1570
1571 for (size_t x = 0; x < newlen[j]; ++x)
1572 if (charused[((const unsigned char *) tablestr[j])[x]]++ == 0)
1573 ++ncharused;
1574 }
1575
1576 size_t ncharused_bits = 0;
1577 i = 1;
1578 while (i < ncharused)
1579 {
1580 i *= 2;
1581 ++ncharused_bits;
1582 }
1583
1584 size_t table_bits = 0;
1585 i = 1;
1586 while (i < table)
1587 {
1588 i *= 2;
1589 ++table_bits;
1590 }
1591
1592 size_t mnemonic_bits = table_bits + pfxbits + sfxbits;
1593 size_t new_total = (((table + 7) / 8) * ncharused_bits + ncharused
1594 + (pfxbits == 0 ? 0 : (1 << pfxbits) - 1)
1595 + (sfxbits == 0 ? 0 : (1 << sfxbits) - 1)
1596 + (((total_bits + mnemonic_bits + 7) / 8)
1597 * ninstructions));
1598
1599 if (new_total < best_so_far)
1600 {
1601 best_so_far = new_total;
1602 best_mnemonic_bits = mnemonic_bits;
1603
1604 free (best_suffix);
1605 best_suffix = xstrdup (suffix);
1606
1607 free (best_prefix);
1608 best_prefix = xstrdup (prefix);
1609 best_prefix_bits = pfxbits;
1610
1611 best_table_size = table;
1612 best_table_bits = table_bits;
1613 char *cp = best_table = xrealloc (best_table, table);
1614 for (i = 0; i < ntablestr; ++i)
1615 {
1616 assert (cp + newlen[i] + 1 <= best_table + table);
1617 cp = mempcpy (cp, tablestr[i], newlen[i]);
1618 *cp++ = '\0';
1619 }
1620 assert (cp == best_table + table);
1621 }
1622 }
1623 }
1624
1625 fputs ("static const char mnemonic_table[] =\n\"", outfile);
1626 for (size_t i = 0; i < best_table_size; ++i)
1627 {
1628 if (((i + 1) % 60) == 0)
1629 fputs ("\"\n\"", outfile);
1630 if (!isascii (best_table[i]) || !isprint (best_table[i]))
1631 fprintf (outfile, "\\%03o", best_table[i]);
1632 else
1633 fputc (best_table[i], outfile);
1634 }
1635 fputs ("\";\n", outfile);
1636
1637 if (best_prefix[0] != '\0')
1638 fprintf (outfile,
1639 "static const char prefix[%zu] = \"%s\";\n"
1640 "#define PREFIXCHAR_BITS %zu\n",
1641 strlen (best_prefix), best_prefix, best_prefix_bits);
1642 else
1643 fputs ("#define NO_PREFIX\n", outfile);
1644
1645 if (best_suffix[0] != '\0')
1646 fprintf (outfile, "static const char suffix[%zu] = \"%s\";\n",
1647 strlen (best_suffix), best_suffix);
1648 else
1649 fputs ("#define NO_SUFFIX\n", outfile);
1650
1651 for (size_t i = 0; i < nmnemonic_strs; ++i)
1652 {
1653 const char *mne = mnemonic_strs[i];
1654
1655 size_t pfxval = 0;
1656 char *cp = strchr (best_prefix, *mne);
1657 if (cp != NULL)
1658 {
1659 pfxval = 1 + (cp - best_prefix);
1660 ++mne;
1661 }
1662
1663 size_t l = strlen (mne);
1664
1665 size_t sfxval = 0;
1666 cp = strchr (best_suffix, mne[l - 1]);
1667 if (cp != NULL)
1668 {
1669 sfxval = 1 + (cp - best_suffix);
1670 --l;
1671 }
1672
1673 char *off = memmem (best_table, best_table_size, mne, l);
1674 while (off[l] != '\0')
1675 {
1676 off = memmem (off + 1, best_table_size, mne, l);
1677 assert (off != NULL);
1678 }
1679
1680 fprintf (outfile, "#define MNE_%s %#zx\n",
1681 mnemonic_strs[i],
1682 (off - best_table)
1683 + ((pfxval + (sfxval << best_prefix_bits)) << best_table_bits));
1684 }
1685 }
1686 #endif
1687