bytecode.c 23.4 KB
Newer Older
Jim Blandy's avatar
Jim Blandy committed
1
/* Execution of byte code produced by bytecomp.el.
Jim Blandy's avatar
Jim Blandy committed
2
   Copyright (C) 1985, 1986, 1987, 1988, 1993 Free Software Foundation, Inc.
Jim Blandy's avatar
Jim Blandy committed
3 4 5 6 7

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
8
the Free Software Foundation; either version 2, or (at your option)
Jim Blandy's avatar
Jim Blandy committed
9 10 11 12 13 14 15 16 17
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
18 19
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Jim Blandy's avatar
Jim Blandy committed
20

21
hacked on by jwz@lucid.com 17-jun-91
Jim Blandy's avatar
Jim Blandy committed
22 23 24 25
  o  added a compile-time switch to turn on simple sanity checking;
  o  put back the obsolete byte-codes for error-detection;
  o  added a new instruction, unbind_all, which I will use for 
     tail-recursion elimination;
26
  o  made temp_output_buffer_show be called with the right number
Jim Blandy's avatar
Jim Blandy committed
27 28 29 30 31
     of args;
  o  made the new bytecodes be called with args in the right order;
  o  added metering support.

by Hallvard:
32
  o  added relative jump instructions;
Jim Blandy's avatar
Jim Blandy committed
33 34 35
  o  all conditionals now only do QUIT if they jump.
 */

36
#include <config.h>
Jim Blandy's avatar
Jim Blandy committed
37 38 39 40
#include "lisp.h"
#include "buffer.h"
#include "syntax.h"

41 42 43 44 45
/*
 * define BYTE_CODE_SAFE to enable some minor sanity checking (useful for 
 * debugging the byte compiler...)
 *
 * define BYTE_CODE_METER to enable generation of a byte-op usage histogram. 
Jim Blandy's avatar
Jim Blandy committed
46
 */
47 48
/* #define BYTE_CODE_SAFE */
/* #define BYTE_CODE_METER */
Jim Blandy's avatar
Jim Blandy committed
49 50 51 52


#ifdef BYTE_CODE_METER

53
Lisp_Object Vbyte_code_meter, Qbyte_code_meter;
Jim Blandy's avatar
Jim Blandy committed
54 55
int byte_metering_on;

56
#define METER_2(code1, code2) \
Jim Blandy's avatar
Jim Blandy committed
57 58 59
  XFASTINT (XVECTOR (XVECTOR (Vbyte_code_meter)->contents[(code1)]) \
	    ->contents[(code2)])

60 61 62 63 64 65 66 67 68 69 70 71 72
#define METER_1(code) METER_2 (0, (code))

#define METER_CODE(last_code, this_code)			\
{								\
  if (byte_metering_on)						\
    {								\
      if (METER_1 (this_code) != ((1<<VALBITS)-1))		\
        METER_1 (this_code)++;					\
      if (last_code						\
	  && METER_2 (last_code, this_code) != ((1<<VALBITS)-1))\
        METER_2 (last_code, this_code)++;			\
    }								\
}
Jim Blandy's avatar
Jim Blandy committed
73

74
#else /* no BYTE_CODE_METER */
Jim Blandy's avatar
Jim Blandy committed
75

76
#define METER_CODE(last_code, this_code)
Richard M. Stallman's avatar
Richard M. Stallman committed
77

78
#endif /* no BYTE_CODE_METER */
Jim Blandy's avatar
Jim Blandy committed
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


Lisp_Object Qbytecode;

/*  Byte codes: */

#define Bvarref 010
#define Bvarset 020
#define Bvarbind 030
#define Bcall 040
#define Bunbind 050

#define Bnth 070
#define Bsymbolp 071
#define Bconsp 072
#define Bstringp 073
#define Blistp 074
#define Beq 075
#define Bmemq 076
#define Bnot 077
#define Bcar 0100
#define Bcdr 0101
#define Bcons 0102
#define Blist1 0103
#define Blist2 0104
#define Blist3 0105
#define Blist4 0106
#define Blength 0107
#define Baref 0110
#define Baset 0111
#define Bsymbol_value 0112
110
#define Bsymbol_function 0113
Jim Blandy's avatar
Jim Blandy committed
111
#define Bset 0114
112
#define Bfset 0115
Jim Blandy's avatar
Jim Blandy committed
113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132
#define Bget 0116
#define Bsubstring 0117
#define Bconcat2 0120
#define Bconcat3 0121
#define Bconcat4 0122
#define Bsub1 0123
#define Badd1 0124
#define Beqlsign 0125
#define Bgtr 0126
#define Blss 0127
#define Bleq 0130
#define Bgeq 0131
#define Bdiff 0132
#define Bnegate 0133
#define Bplus 0134
#define Bmax 0135
#define Bmin 0136
#define Bmult 0137

#define Bpoint 0140
133 134
/* Was Bmark in v17.  */
#define Bsave_current_buffer 0141
Jim Blandy's avatar
Jim Blandy committed
135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150
#define Bgoto_char 0142
#define Binsert 0143
#define Bpoint_max 0144
#define Bpoint_min 0145
#define Bchar_after 0146
#define Bfollowing_char 0147
#define Bpreceding_char 0150
#define Bcurrent_column 0151
#define Bindent_to 0152
#define Bscan_buffer 0153 /* No longer generated as of v18 */
#define Beolp 0154
#define Beobp 0155
#define Bbolp 0156
#define Bbobp 0157
#define Bcurrent_buffer 0160
#define Bset_buffer 0161
Richard M. Stallman's avatar
Richard M. Stallman committed
151
#define Bsave_current_buffer_1 0162 /* Replacing Bsave_current_buffer.  */
152
#define Bread_char 0162 /* No longer generated as of v19 */
Jim Blandy's avatar
Jim Blandy committed
153 154 155 156 157 158 159 160 161 162 163 164 165
#define Bset_mark 0163 /* this loser is no longer generated as of v18 */
#define Binteractive_p 0164 /* Needed since interactive-p takes unevalled args */

#define Bforward_char 0165
#define Bforward_word 0166
#define Bskip_chars_forward 0167
#define Bskip_chars_backward 0170
#define Bforward_line 0171
#define Bchar_syntax 0172
#define Bbuffer_substring 0173
#define Bdelete_region 0174
#define Bnarrow_to_region 0175
#define Bwiden 0176
166
#define Bend_of_line 0177
Jim Blandy's avatar
Jim Blandy committed
167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189

#define Bconstant2 0201
#define Bgoto 0202
#define Bgotoifnil 0203
#define Bgotoifnonnil 0204
#define Bgotoifnilelsepop 0205
#define Bgotoifnonnilelsepop 0206
#define Breturn 0207
#define Bdiscard 0210
#define Bdup 0211

#define Bsave_excursion 0212
#define Bsave_window_excursion 0213
#define Bsave_restriction 0214
#define Bcatch 0215

#define Bunwind_protect 0216
#define Bcondition_case 0217
#define Btemp_output_buffer_setup 0220
#define Btemp_output_buffer_show 0221

#define Bunbind_all 0222

190 191 192 193 194 195
#define Bset_marker 0223
#define Bmatch_beginning 0224
#define Bmatch_end 0225
#define Bupcase 0226
#define Bdowncase 0227

Jim Blandy's avatar
Jim Blandy committed
196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213
#define Bstringeqlsign 0230
#define Bstringlss 0231
#define Bequal 0232
#define Bnthcdr 0233
#define Belt 0234
#define Bmember 0235
#define Bassq 0236
#define Bnreverse 0237
#define Bsetcar 0240
#define Bsetcdr 0241
#define Bcar_safe 0242
#define Bcdr_safe 0243
#define Bnconc 0244
#define Bquo 0245
#define Brem 0246
#define Bnumberp 0247
#define Bintegerp 0250

214 215 216 217 218 219 220 221 222 223
#define BRgoto 0252
#define BRgotoifnil 0253
#define BRgotoifnonnil 0254
#define BRgotoifnilelsepop 0255
#define BRgotoifnonnilelsepop 0256

#define BlistN 0257
#define BconcatN 0260
#define BinsertN 0261

Jim Blandy's avatar
Jim Blandy committed
224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254
#define Bconstant 0300
#define CONSTANTLIM 0100

/* Fetch the next byte from the bytecode stream */

#define FETCH *pc++

/* Fetch two bytes from the bytecode stream
 and make a 16-bit number out of them */

#define FETCH2 (op = FETCH, op + (FETCH << 8))

/* Push x onto the execution stack. */

/* This used to be #define PUSH(x) (*++stackp = (x))
   This oddity is necessary because Alliant can't be bothered to
   compile the preincrement operator properly, as of 4/91.  -JimB  */
#define PUSH(x) (stackp++, *stackp = (x))

/* Pop a value off the execution stack.  */

#define POP (*stackp--)

/* Discard n values from the execution stack.  */

#define DISCARD(n) (stackp -= (n))

/* Get the value which is at the top of the execution stack, but don't pop it. */

#define TOP (*stackp)

Richard M. Stallman's avatar
Richard M. Stallman committed
255 256 257 258 259
/* Garbage collect if we have consed enough since the last time.
   We do this at every branch, to avoid loops that never GC.  */

#define MAYBE_GC()				\
  if (consing_since_gc > gc_cons_threshold)	\
260 261 262 263 264 265 266 267 268 269 270 271 272 273
    {						\
      Fgarbage_collect ();			\
      HANDLE_RELOCATION ();			\
    }						\
  else

/* Relocate BYTESTR if there has been a GC recently.  */
#define HANDLE_RELOCATION()						\
  if (! EQ (string_saved, bytestr))					\
    {									\
      pc = pc - XSTRING (string_saved)->data + XSTRING (bytestr)->data;	\
      string_saved = bytestr;						\
    }									\
  else
Richard M. Stallman's avatar
Richard M. Stallman committed
274

275 276 277 278
/* Check for jumping out of range.  */
#define CHECK_RANGE(ARG)			\
  if (ARG >= bytestr_length) abort ()

Jim Blandy's avatar
Jim Blandy committed
279 280
DEFUN ("byte-code", Fbyte_code, Sbyte_code, 3, 3, 0,
  "Function used internally in byte-compiled code.\n\
281 282 283
The first argument, BYTESTR, is a string of byte code;\n\
the second, VECTOR, a vector of constants;\n\
the third, MAXDEPTH, the maximum stack depth used in this function.\n\
Jim Blandy's avatar
Jim Blandy committed
284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308
If the third argument is incorrect, Emacs may crash.")
  (bytestr, vector, maxdepth)
     Lisp_Object bytestr, vector, maxdepth;
{
  struct gcpro gcpro1, gcpro2, gcpro3;
  int count = specpdl_ptr - specpdl;
#ifdef BYTE_CODE_METER
  int this_op = 0;
  int prev_op;
#endif
  register int op;
  unsigned char *pc;
  Lisp_Object *stack;
  register Lisp_Object *stackp;
  Lisp_Object *stacke;
  register Lisp_Object v1, v2;
  register Lisp_Object *vectorp = XVECTOR (vector)->contents;
#ifdef BYTE_CODE_SAFE
  register int const_length = XVECTOR (vector)->size;
#endif
  /* Copy of BYTESTR, saved so we can tell if BYTESTR was relocated.  */
  Lisp_Object string_saved;
  /* Cached address of beginning of string,
     valid if BYTESTR equals STRING_SAVED.  */
  register unsigned char *strbeg;
309
  int bytestr_length = XSTRING (bytestr)->size_byte;
Jim Blandy's avatar
Jim Blandy committed
310 311

  CHECK_STRING (bytestr, 0);
312
  if (!VECTORP (vector))
Jim Blandy's avatar
Jim Blandy committed
313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332
    vector = wrong_type_argument (Qvectorp, vector);
  CHECK_NUMBER (maxdepth, 2);

  stackp = (Lisp_Object *) alloca (XFASTINT (maxdepth) * sizeof (Lisp_Object));
  bzero (stackp, XFASTINT (maxdepth) * sizeof (Lisp_Object));
  GCPRO3 (bytestr, vector, *stackp);
  gcpro3.nvars = XFASTINT (maxdepth);

  --stackp;
  stack = stackp;
  stacke = stackp + XFASTINT (maxdepth);

  /* Initialize the saved pc-pointer for fetching from the string.  */
  string_saved = bytestr;
  pc = XSTRING (string_saved)->data;

  while (1)
    {
#ifdef BYTE_CODE_SAFE
      if (stackp > stacke)
333
	error ("Byte code stack overflow (byte compiler bug), pc %d, depth %d",
Jim Blandy's avatar
Jim Blandy committed
334 335
	       pc - XSTRING (string_saved)->data, stacke - stackp);
      if (stackp < stack)
336
	error ("Byte code stack underflow (byte compiler bug), pc %d",
Jim Blandy's avatar
Jim Blandy committed
337 338 339
	       pc - XSTRING (string_saved)->data);
#endif

340 341
      /* Update BYTESTR if we had a garbage collection.  */
      HANDLE_RELOCATION ();
Jim Blandy's avatar
Jim Blandy committed
342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364

#ifdef BYTE_CODE_METER
      prev_op = this_op;
      this_op = op = FETCH;
      METER_CODE (prev_op, op);
      switch (op)
#else
      switch (op = FETCH)
#endif
	{
	case Bvarref+6:
	  op = FETCH;
	  goto varref;

	case Bvarref+7:
	  op = FETCH2;
	  goto varref;

	case Bvarref: case Bvarref+1: case Bvarref+2: case Bvarref+3:
	case Bvarref+4: case Bvarref+5:
	  op = op - Bvarref;
	varref:
	  v1 = vectorp[op];
365
	  if (!SYMBOLP (v1))
Jim Blandy's avatar
Jim Blandy committed
366 367 368 369
	    v2 = Fsymbol_value (v1);
	  else
	    {
	      v2 = XSYMBOL (v1)->value;
370 371
	      if (MISCP (v2) || EQ (v2, Qunbound))
		v2 = Fsymbol_value (v1);
Jim Blandy's avatar
Jim Blandy committed
372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417
	    }
	  PUSH (v2);
	  break;

	case Bvarset+6:
	  op = FETCH;
	  goto varset;

	case Bvarset+7:
	  op = FETCH2;
	  goto varset;

	case Bvarset: case Bvarset+1: case Bvarset+2: case Bvarset+3:
	case Bvarset+4: case Bvarset+5:
	  op -= Bvarset;
	varset:
	  Fset (vectorp[op], POP);
	  break;

	case Bvarbind+6:
	  op = FETCH;
	  goto varbind;

	case Bvarbind+7:
	  op = FETCH2;
	  goto varbind;

	case Bvarbind: case Bvarbind+1: case Bvarbind+2: case Bvarbind+3:
	case Bvarbind+4: case Bvarbind+5:
	  op -= Bvarbind;
	varbind:
	  specbind (vectorp[op], POP);
	  break;

	case Bcall+6:
	  op = FETCH;
	  goto docall;

	case Bcall+7:
	  op = FETCH2;
	  goto docall;

	case Bcall: case Bcall+1: case Bcall+2: case Bcall+3:
	case Bcall+4: case Bcall+5:
	  op -= Bcall;
	docall:
418 419
	  DISCARD (op);
#ifdef BYTE_CODE_METER
420
	  if (byte_metering_on && SYMBOLP (TOP))
421 422 423
	    {
	      v1 = TOP;
	      v2 = Fget (v1, Qbyte_code_meter);
424
	      if (INTEGERP (v2)
425 426 427 428 429 430 431
		  && XINT (v2) != ((1<<VALBITS)-1))
		{
		  XSETINT (v2, XINT (v2) + 1);
		  Fput (v1, Qbyte_code_meter, v2);
		}
	    }
#endif
Jim Blandy's avatar
Jim Blandy committed
432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451
	  TOP = Ffuncall (op + 1, &TOP);
	  break;

	case Bunbind+6:
	  op = FETCH;
	  goto dounbind;

	case Bunbind+7:
	  op = FETCH2;
	  goto dounbind;

	case Bunbind: case Bunbind+1: case Bunbind+2: case Bunbind+3:
	case Bunbind+4: case Bunbind+5:
	  op -= Bunbind;
	dounbind:
	  unbind_to (specpdl_ptr - specpdl - op, Qnil);
	  break;

	case Bunbind_all:
	  /* To unbind back to the beginning of this frame.  Not used yet,
452
	     but will be needed for tail-recursion elimination.  */
Jim Blandy's avatar
Jim Blandy committed
453 454 455 456
	  unbind_to (count, Qnil);
	  break;

	case Bgoto:
Richard M. Stallman's avatar
Richard M. Stallman committed
457
	  MAYBE_GC ();
Jim Blandy's avatar
Jim Blandy committed
458 459
	  QUIT;
	  op = FETCH2;    /* pc = FETCH2 loses since FETCH2 contains pc++ */
460
	  CHECK_RANGE (op);
Jim Blandy's avatar
Jim Blandy committed
461 462 463 464
	  pc = XSTRING (string_saved)->data + op;
	  break;

	case Bgotoifnil:
Richard M. Stallman's avatar
Richard M. Stallman committed
465
	  MAYBE_GC ();
Jim Blandy's avatar
Jim Blandy committed
466
	  op = FETCH2;
Joseph Arceneaux's avatar
Joseph Arceneaux committed
467
	  if (NILP (POP))
Jim Blandy's avatar
Jim Blandy committed
468 469
	    {
	      QUIT;
470
	      CHECK_RANGE (op);
Jim Blandy's avatar
Jim Blandy committed
471 472 473 474 475
	      pc = XSTRING (string_saved)->data + op;
	    }
	  break;

	case Bgotoifnonnil:
Richard M. Stallman's avatar
Richard M. Stallman committed
476
	  MAYBE_GC ();
Jim Blandy's avatar
Jim Blandy committed
477
	  op = FETCH2;
Joseph Arceneaux's avatar
Joseph Arceneaux committed
478
	  if (!NILP (POP))
Jim Blandy's avatar
Jim Blandy committed
479 480
	    {
	      QUIT;
481
	      CHECK_RANGE (op);
Jim Blandy's avatar
Jim Blandy committed
482 483 484 485 486
	      pc = XSTRING (string_saved)->data + op;
	    }
	  break;

	case Bgotoifnilelsepop:
Richard M. Stallman's avatar
Richard M. Stallman committed
487
	  MAYBE_GC ();
Jim Blandy's avatar
Jim Blandy committed
488
	  op = FETCH2;
Joseph Arceneaux's avatar
Joseph Arceneaux committed
489
	  if (NILP (TOP))
Jim Blandy's avatar
Jim Blandy committed
490 491
	    {
	      QUIT;
492
	      CHECK_RANGE (op);
Jim Blandy's avatar
Jim Blandy committed
493 494
	      pc = XSTRING (string_saved)->data + op;
	    }
495
	  else DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
496 497 498
	  break;

	case Bgotoifnonnilelsepop:
Richard M. Stallman's avatar
Richard M. Stallman committed
499
	  MAYBE_GC ();
Jim Blandy's avatar
Jim Blandy committed
500
	  op = FETCH2;
Joseph Arceneaux's avatar
Joseph Arceneaux committed
501
	  if (!NILP (TOP))
Jim Blandy's avatar
Jim Blandy committed
502 503
	    {
	      QUIT;
504
	      CHECK_RANGE (op);
Jim Blandy's avatar
Jim Blandy committed
505 506
	      pc = XSTRING (string_saved)->data + op;
	    }
507 508 509 510
	  else DISCARD (1);
	  break;

	case BRgoto:
Richard M. Stallman's avatar
Richard M. Stallman committed
511
	  MAYBE_GC ();
512
	  QUIT;
513
	  pc += (int) *pc - 127;
514 515 516
	  break;

	case BRgotoifnil:
Richard M. Stallman's avatar
Richard M. Stallman committed
517
	  MAYBE_GC ();
518 519 520
	  if (NILP (POP))
	    {
	      QUIT;
521
	      pc += (int) *pc - 128;
522 523 524 525 526
	    }
	  pc++;
	  break;

	case BRgotoifnonnil:
Richard M. Stallman's avatar
Richard M. Stallman committed
527
	  MAYBE_GC ();
528 529 530
	  if (!NILP (POP))
	    {
	      QUIT;
531
	      pc += (int) *pc - 128;
532 533 534 535 536
	    }
	  pc++;
	  break;

	case BRgotoifnilelsepop:
Richard M. Stallman's avatar
Richard M. Stallman committed
537
	  MAYBE_GC ();
538 539 540 541 542 543 544 545 546 547
	  op = *pc++;
	  if (NILP (TOP))
	    {
	      QUIT;
	      pc += op - 128;
	    }
	  else DISCARD (1);
	  break;

	case BRgotoifnonnilelsepop:
Richard M. Stallman's avatar
Richard M. Stallman committed
548
	  MAYBE_GC ();
549 550 551 552 553 554 555
	  op = *pc++;
	  if (!NILP (TOP))
	    {
	      QUIT;
	      pc += op - 128;
	    }
	  else DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
556 557
	  break;

Jim Blandy's avatar
Jim Blandy committed
558 559 560 561 562
	case Breturn:
	  v1 = POP;
	  goto exit;

	case Bdiscard:
563
	  DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
564 565 566 567 568 569 570 571 572 573 574 575 576 577 578
	  break;

	case Bdup:
	  v1 = TOP;
	  PUSH (v1);
	  break;

	case Bconstant2:
	  PUSH (vectorp[FETCH2]);
	  break;

	case Bsave_excursion:
	  record_unwind_protect (save_excursion_restore, save_excursion_save ());
	  break;

579
	case Bsave_current_buffer:
Richard M. Stallman's avatar
Richard M. Stallman committed
580
	case Bsave_current_buffer_1:
581 582 583
	  record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
	  break;

Jim Blandy's avatar
Jim Blandy committed
584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614
	case Bsave_window_excursion:
	  TOP = Fsave_window_excursion (TOP);
	  break;

	case Bsave_restriction:
	  record_unwind_protect (save_restriction_restore, save_restriction_save ());
	  break;

	case Bcatch:
	  v1 = POP;
	  TOP = internal_catch (TOP, Feval, v1);
	  break;

	case Bunwind_protect:
	  record_unwind_protect (0, POP);
	  (specpdl_ptr - 1)->symbol = Qnil;
	  break;

	case Bcondition_case:
	  v1 = POP;
	  v1 = Fcons (POP, v1);
	  TOP = Fcondition_case (Fcons (TOP, v1));
	  break;

	case Btemp_output_buffer_setup:
	  temp_output_buffer_setup (XSTRING (TOP)->data);
	  TOP = Vstandard_output;
	  break;

	case Btemp_output_buffer_show:
	  v1 = POP;
615
	  temp_output_buffer_show (TOP);
Jim Blandy's avatar
Jim Blandy committed
616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631
	  TOP = v1;
	  /* pop binding of standard-output */
	  unbind_to (specpdl_ptr - specpdl - 1, Qnil);
	  break;

	case Bnth:
	  v1 = POP;
	  v2 = TOP;
	nth_entry:
	  CHECK_NUMBER (v2, 0);
	  op = XINT (v2);
	  immediate_quit = 1;
	  while (--op >= 0)
	    {
	      if (CONSP (v1))
		v1 = XCONS (v1)->cdr;
Joseph Arceneaux's avatar
Joseph Arceneaux committed
632
	      else if (!NILP (v1))
Jim Blandy's avatar
Jim Blandy committed
633 634 635 636 637 638 639 640 641 642 643
		{
		  immediate_quit = 0;
		  v1 = wrong_type_argument (Qlistp, v1);
		  immediate_quit = 1;
		  op++;
		}
	    }
	  immediate_quit = 0;
	  goto docar;

	case Bsymbolp:
644
	  TOP = SYMBOLP (TOP) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
645 646 647 648 649 650 651
	  break;

	case Bconsp:
	  TOP = CONSP (TOP) ? Qt : Qnil;
	  break;

	case Bstringp:
652
	  TOP = STRINGP (TOP) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
653 654 655
	  break;

	case Blistp:
Joseph Arceneaux's avatar
Joseph Arceneaux committed
656
	  TOP = CONSP (TOP) || NILP (TOP) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
657 658 659 660 661 662 663 664 665 666 667 668 669
	  break;

	case Beq:
	  v1 = POP;
	  TOP = EQ (v1, TOP) ? Qt : Qnil;
	  break;

	case Bmemq:
	  v1 = POP;
	  TOP = Fmemq (TOP, v1);
	  break;

	case Bnot:
Joseph Arceneaux's avatar
Joseph Arceneaux committed
670
	  TOP = NILP (TOP) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
671 672 673 674 675 676
	  break;

	case Bcar:
	  v1 = TOP;
	docar:
	  if (CONSP (v1)) TOP = XCONS (v1)->car;
Joseph Arceneaux's avatar
Joseph Arceneaux committed
677
	  else if (NILP (v1)) TOP = Qnil;
Jim Blandy's avatar
Jim Blandy committed
678 679 680 681 682 683
	  else Fcar (wrong_type_argument (Qlistp, v1));
	  break;

	case Bcdr:
	  v1 = TOP;
	  if (CONSP (v1)) TOP = XCONS (v1)->cdr;
Joseph Arceneaux's avatar
Joseph Arceneaux committed
684
	  else if (NILP (v1)) TOP = Qnil;
Jim Blandy's avatar
Jim Blandy committed
685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702
	  else Fcdr (wrong_type_argument (Qlistp, v1));
	  break;

	case Bcons:
	  v1 = POP;
	  TOP = Fcons (TOP, v1);
	  break;

	case Blist1:
	  TOP = Fcons (TOP, Qnil);
	  break;

	case Blist2:
	  v1 = POP;
	  TOP = Fcons (TOP, Fcons (v1, Qnil));
	  break;

	case Blist3:
703
	  DISCARD (2);
Jim Blandy's avatar
Jim Blandy committed
704 705 706 707
	  TOP = Flist (3, &TOP);
	  break;

	case Blist4:
708
	  DISCARD (3);
Jim Blandy's avatar
Jim Blandy committed
709 710 711
	  TOP = Flist (4, &TOP);
	  break;

712 713 714 715 716 717
	case BlistN:
	  op = FETCH;
	  DISCARD (op - 1);
	  TOP = Flist (op, &TOP);
	  break;

Jim Blandy's avatar
Jim Blandy committed
718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760
	case Blength:
	  TOP = Flength (TOP);
	  break;

	case Baref:
    	  v1 = POP;
	  TOP = Faref (TOP, v1);
	  break;

	case Baset:
	  v2 = POP; v1 = POP;
	  TOP = Faset (TOP, v1, v2);
	  break;

	case Bsymbol_value:
	  TOP = Fsymbol_value (TOP);
	  break;

	case Bsymbol_function:
	  TOP = Fsymbol_function (TOP);
	  break;

	case Bset:
	  v1 = POP;
	  TOP = Fset (TOP, v1);
	  break;

	case Bfset:
	  v1 = POP;
	  TOP = Ffset (TOP, v1);
	  break;

	case Bget:
	  v1 = POP;
	  TOP = Fget (TOP, v1);
	  break;

	case Bsubstring:
	  v2 = POP; v1 = POP;
	  TOP = Fsubstring (TOP, v1, v2);
	  break;

	case Bconcat2:
761
	  DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
762 763 764 765
	  TOP = Fconcat (2, &TOP);
	  break;

	case Bconcat3:
766
	  DISCARD (2);
Jim Blandy's avatar
Jim Blandy committed
767 768 769 770
	  TOP = Fconcat (3, &TOP);
	  break;

	case Bconcat4:
771
	  DISCARD (3);
Jim Blandy's avatar
Jim Blandy committed
772 773 774
	  TOP = Fconcat (4, &TOP);
	  break;

775 776 777 778 779 780
	case BconcatN:
	  op = FETCH;
	  DISCARD (op - 1);
	  TOP = Fconcat (op, &TOP);
	  break;

Jim Blandy's avatar
Jim Blandy committed
781 782
	case Bsub1:
	  v1 = TOP;
783
	  if (INTEGERP (v1))
Jim Blandy's avatar
Jim Blandy committed
784 785 786 787 788 789 790 791 792 793
	    {
	      XSETINT (v1, XINT (v1) - 1);
	      TOP = v1;
	    }
	  else
	    TOP = Fsub1 (v1);
	  break;

	case Badd1:
	  v1 = TOP;
794
	  if (INTEGERP (v1))
Jim Blandy's avatar
Jim Blandy committed
795 796 797 798 799 800 801 802 803 804 805 806
	    {
	      XSETINT (v1, XINT (v1) + 1);
	      TOP = v1;
	    }
	  else
	    TOP = Fadd1 (v1);
	  break;

	case Beqlsign:
	  v2 = POP; v1 = TOP;
	  CHECK_NUMBER_OR_FLOAT_COERCE_MARKER (v1, 0);
	  CHECK_NUMBER_OR_FLOAT_COERCE_MARKER (v2, 0);
807
#ifdef LISP_FLOAT_TYPE
808
	  if (FLOATP (v1) || FLOATP (v2))
809 810 811 812 813 814 815 816 817
	    {
	      double f1, f2;

	      f1 = (FLOATP (v1) ? XFLOAT (v1)->data : XINT (v1));
	      f2 = (FLOATP (v2) ? XFLOAT (v2)->data : XINT (v2));
	      TOP = (f1 == f2 ? Qt : Qnil);
	    }
	  else
#endif
Karl Heuer's avatar
Karl Heuer committed
818
	    TOP = (XINT (v1) == XINT (v2) ? Qt : Qnil);
Jim Blandy's avatar
Jim Blandy committed
819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841
	  break;

	case Bgtr:
	  v1 = POP;
	  TOP = Fgtr (TOP, v1);
	  break;

	case Blss:
	  v1 = POP;
	  TOP = Flss (TOP, v1);
	  break;

	case Bleq:
	  v1 = POP;
	  TOP = Fleq (TOP, v1);
	  break;

	case Bgeq:
	  v1 = POP;
	  TOP = Fgeq (TOP, v1);
	  break;

	case Bdiff:
842
	  DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
843 844 845 846 847
	  TOP = Fminus (2, &TOP);
	  break;

	case Bnegate:
	  v1 = TOP;
848
	  if (INTEGERP (v1))
Jim Blandy's avatar
Jim Blandy committed
849 850 851 852 853 854 855 856 857
	    {
	      XSETINT (v1, - XINT (v1));
	      TOP = v1;
	    }
	  else
	    TOP = Fminus (1, &TOP);
	  break;

	case Bplus:
858
	  DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
859 860 861 862
	  TOP = Fplus (2, &TOP);
	  break;

	case Bmax:
863
	  DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
864 865 866 867
	  TOP = Fmax (2, &TOP);
	  break;

	case Bmin:
868
	  DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
869 870 871 872
	  TOP = Fmin (2, &TOP);
	  break;

	case Bmult:
873
	  DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
874 875 876 877
	  TOP = Ftimes (2, &TOP);
	  break;

	case Bquo:
878
	  DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
879 880 881 882 883 884 885 886 887
	  TOP = Fquo (2, &TOP);
	  break;

	case Brem:
	  v1 = POP;
	  TOP = Frem (TOP, v1);
	  break;

	case Bpoint:
888
	  XSETFASTINT (v1, PT);
Jim Blandy's avatar
Jim Blandy committed
889 890 891 892 893 894 895 896 897 898 899
	  PUSH (v1);
	  break;

	case Bgoto_char:
	  TOP = Fgoto_char (TOP);
	  break;

	case Binsert:
	  TOP = Finsert (1, &TOP);
	  break;

900 901 902 903 904 905
	case BinsertN:
	  op = FETCH;
	  DISCARD (op - 1);
	  TOP = Finsert (op, &TOP);
	  break;

Jim Blandy's avatar
Jim Blandy committed
906
	case Bpoint_max:
907
	  XSETFASTINT (v1, ZV);
Jim Blandy's avatar
Jim Blandy committed
908 909 910 911
	  PUSH (v1);
	  break;

	case Bpoint_min:
912
	  XSETFASTINT (v1, BEGV);
Jim Blandy's avatar
Jim Blandy committed
913 914 915 916 917 918 919 920
	  PUSH (v1);
	  break;

	case Bchar_after:
	  TOP = Fchar_after (TOP);
	  break;

	case Bfollowing_char:
921
	  v1 = Ffollowing_char ();
Jim Blandy's avatar
Jim Blandy committed
922 923 924 925
	  PUSH (v1);
	  break;

	case Bpreceding_char:
926
	  v1 = Fprevious_char ();
Jim Blandy's avatar
Jim Blandy committed
927 928 929 930
	  PUSH (v1);
	  break;

	case Bcurrent_column:
931
	  XSETFASTINT (v1, current_column ());
Jim Blandy's avatar
Jim Blandy committed
932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990
	  PUSH (v1);
	  break;

	case Bindent_to:
	  TOP = Findent_to (TOP, Qnil);
	  break;

	case Beolp:
	  PUSH (Feolp ());
	  break;

	case Beobp:
	  PUSH (Feobp ());
	  break;

	case Bbolp:
	  PUSH (Fbolp ());
	  break;

	case Bbobp:
	  PUSH (Fbobp ());
	  break;

	case Bcurrent_buffer:
	  PUSH (Fcurrent_buffer ());
	  break;

	case Bset_buffer:
	  TOP = Fset_buffer (TOP);
	  break;

	case Binteractive_p:
	  PUSH (Finteractive_p ());
	  break;

	case Bforward_char:
	  TOP = Fforward_char (TOP);
	  break;

	case Bforward_word:
	  TOP = Fforward_word (TOP);
	  break;

	case Bskip_chars_forward:
	  v1 = POP;
	  TOP = Fskip_chars_forward (TOP, v1);
	  break;

	case Bskip_chars_backward:
	  v1 = POP;
	  TOP = Fskip_chars_backward (TOP, v1);
	  break;

	case Bforward_line:
	  TOP = Fforward_line (TOP);
	  break;

	case Bchar_syntax:
	  CHECK_NUMBER (TOP, 0);
991
	  XSETFASTINT (TOP,
992
		       syntax_code_spec[(int) SYNTAX (XINT (TOP))]);
Jim Blandy's avatar
Jim Blandy committed
993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013
	  break;

	case Bbuffer_substring:
	  v1 = POP;
	  TOP = Fbuffer_substring (TOP, v1);
	  break;

	case Bdelete_region:
	  v1 = POP;
	  TOP = Fdelete_region (TOP, v1);
	  break;

	case Bnarrow_to_region:
	  v1 = POP;
	  TOP = Fnarrow_to_region (TOP, v1);
	  break;

	case Bwiden:
	  PUSH (Fwiden ());
	  break;

1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039
	case Bend_of_line:
	  TOP = Fend_of_line (TOP);
	  break;

	case Bset_marker:
	  v1 = POP;
	  v2 = POP;
	  TOP = Fset_marker (TOP, v2, v1);
	  break;

	case Bmatch_beginning:
	  TOP = Fmatch_beginning (TOP);
	  break;

	case Bmatch_end:
	  TOP = Fmatch_end (TOP);
	  break;

	case Bupcase:
	  TOP = Fupcase (TOP);
	  break;

	case Bdowncase:
	  TOP = Fdowncase (TOP);
	break;

Jim Blandy's avatar
Jim Blandy committed
1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060
	case Bstringeqlsign:
	  v1 = POP;
	  TOP = Fstring_equal (TOP, v1);
	  break;

	case Bstringlss:
	  v1 = POP;
	  TOP = Fstring_lessp (TOP, v1);
	  break;

	case Bequal:
	  v1 = POP;
	  TOP = Fequal (TOP, v1);
	  break;

	case Bnthcdr:
	  v1 = POP;
	  TOP = Fnthcdr (TOP, v1);
	  break;

	case Belt:
1061
	  if (CONSP (TOP))
Jim Blandy's avatar
Jim Blandy committed
1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097
	    {
	      /* Exchange args and then do nth.  */
	      v2 = POP;
	      v1 = TOP;
	      goto nth_entry;
	    }
	  v1 = POP;
	  TOP = Felt (TOP, v1);
	  break;

	case Bmember:
	  v1 = POP;
	  TOP = Fmember (TOP, v1);
	  break;

	case Bassq:
	  v1 = POP;
	  TOP = Fassq (TOP, v1);
	  break;

	case Bnreverse:
	  TOP = Fnreverse (TOP);
	  break;

	case Bsetcar:
	  v1 = POP;
	  TOP = Fsetcar (TOP, v1);
	  break;

	case Bsetcdr:
	  v1 = POP;
	  TOP = Fsetcdr (TOP, v1);
	  break;

	case Bcar_safe:
	  v1 = TOP;
1098
	  if (CONSP (v1))
Jim Blandy's avatar
Jim Blandy committed
1099 1100 1101 1102 1103 1104 1105
	    TOP = XCONS (v1)->car;
	  else
	    TOP = Qnil;
	  break;

	case Bcdr_safe:
	  v1 = TOP;
1106
	  if (CONSP (v1))
Jim Blandy's avatar
Jim Blandy committed
1107 1108 1109 1110 1111 1112
	    TOP = XCONS (v1)->cdr;
	  else
	    TOP = Qnil;
	  break;

	case Bnconc:
1113
	  DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
1114 1115 1116 1117
	  TOP = Fnconc (2, &TOP);
	  break;

	case Bnumberp:
1118
	  TOP = (NUMBERP (TOP) ? Qt : Qnil);
Jim Blandy's avatar
Jim Blandy committed
1119 1120 1121
	  break;

	case Bintegerp:
1122
	  TOP = INTEGERP (TOP) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
1123 1124 1125 1126 1127 1128 1129 1130 1131 1132
	  break;

#ifdef BYTE_CODE_SAFE
	case Bset_mark:
	  error ("set-mark is an obsolete bytecode");
	  break;
	case Bscan_buffer:
	  error ("scan-buffer is an obsolete bytecode");
	  break;
	case Bmark:
1133
	  error ("mark is an obsolete bytecode");
Jim Blandy's avatar
Jim Blandy committed
1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171
	  break;
#endif

	default:
#ifdef BYTE_CODE_SAFE
	  if (op < Bconstant)
	    error ("unknown bytecode %d (byte compiler bug)", op);
	  if ((op -= Bconstant) >= const_length)
	    error ("no constant number %d (byte compiler bug)", op);
	  PUSH (vectorp[op]);
#else
	  PUSH (vectorp[op - Bconstant]);
#endif
	}
    }

 exit:
  UNGCPRO;
  /* Binds and unbinds are supposed to be compiled balanced.  */
  if (specpdl_ptr - specpdl != count)
#ifdef BYTE_CODE_SAFE
    error ("binding stack not balanced (serious byte compiler bug)");
#else
    abort ();
#endif
  return v1;
}

syms_of_bytecode ()
{
  Qbytecode = intern ("byte-code");
  staticpro (&Qbytecode);

  defsubr (&Sbyte_code);

#ifdef BYTE_CODE_METER

  DEFVAR_LISP ("byte-code-meter", &Vbyte_code_meter,
1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182
   "A vector of vectors which holds a histogram of byte-code usage.\n\
(aref (aref byte-code-meter 0) CODE) indicates how many times the byte\n\
opcode CODE has been executed.\n\
(aref (aref byte-code-meter CODE1) CODE2), where CODE1 is not 0,\n\
indicates how many times the byte opcodes CODE1 and CODE2 have been\n\
executed in succession.");
  DEFVAR_BOOL ("byte-metering-on", &byte_metering_on,
   "If non-nil, keep profiling information on byte code usage.\n\
The variable byte-code-meter indicates how often each byte opcode is used.\n\
If a symbol has a property named `byte-code-meter' whose value is an\n\
integer, it is incremented each time that symbol's function is called.");
Jim Blandy's avatar
Jim Blandy committed
1183 1184

  byte_metering_on = 0;
1185 1186 1187
  Vbyte_code_meter = Fmake_vector (make_number (256), make_number (0));
  Qbyte_code_meter = intern ("byte-code-meter");
  staticpro (&Qbyte_code_meter);
Jim Blandy's avatar
Jim Blandy committed
1188 1189 1190
  {
    int i = 256;
    while (i--)
1191 1192
      XVECTOR (Vbyte_code_meter)->contents[i] =
	Fmake_vector (make_number (256), make_number (0));
Jim Blandy's avatar
Jim Blandy committed
1193 1194 1195
  }
#endif
}