bytecode.c 34 KB
Newer Older
Jim Blandy's avatar
Jim Blandy committed
1
/* Execution of byte code produced by bytecomp.el.
2
   Copyright (C) 1985, 1986, 1987, 1988, 1993, 2000, 2001, 2002, 2003, 2004
Gerd Moellmann's avatar
Gerd Moellmann committed
3
   Free Software Foundation, Inc.
Jim Blandy's avatar
Jim Blandy committed
4 5 6 7 8

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
9
the Free Software Foundation; either version 2, or (at your option)
Jim Blandy's avatar
Jim Blandy committed
10 11 12 13 14 15 16 17 18
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
19 20
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Jim Blandy's avatar
Jim Blandy committed
21

22
hacked on by jwz@lucid.com 17-jun-91
Jim Blandy's avatar
Jim Blandy committed
23 24
  o  added a compile-time switch to turn on simple sanity checking;
  o  put back the obsolete byte-codes for error-detection;
25
  o  added a new instruction, unbind_all, which I will use for
Jim Blandy's avatar
Jim Blandy committed
26
     tail-recursion elimination;
27
  o  made temp_output_buffer_show be called with the right number
Jim Blandy's avatar
Jim Blandy committed
28 29 30 31 32
     of args;
  o  made the new bytecodes be called with args in the right order;
  o  added metering support.

by Hallvard:
33
  o  added relative jump instructions;
Jim Blandy's avatar
Jim Blandy committed
34 35 36
  o  all conditionals now only do QUIT if they jump.
 */

37
#include <config.h>
Jim Blandy's avatar
Jim Blandy committed
38 39
#include "lisp.h"
#include "buffer.h"
Kenichi Handa's avatar
Kenichi Handa committed
40
#include "charset.h"
Jim Blandy's avatar
Jim Blandy committed
41
#include "syntax.h"
Stefan Monnier's avatar
Stefan Monnier committed
42
#include "window.h"
Jim Blandy's avatar
Jim Blandy committed
43

44 45 46 47 48
#ifdef CHECK_FRAME_FONT
#include "frame.h"
#include "xterm.h"
#endif

49
/*
50
 * define BYTE_CODE_SAFE to enable some minor sanity checking (useful for
51 52
 * debugging the byte compiler...)
 *
53
 * define BYTE_CODE_METER to enable generation of a byte-op usage histogram.
Jim Blandy's avatar
Jim Blandy committed
54
 */
55 56
/* #define BYTE_CODE_SAFE */
/* #define BYTE_CODE_METER */
Jim Blandy's avatar
Jim Blandy committed
57 58 59 60


#ifdef BYTE_CODE_METER

61
Lisp_Object Vbyte_code_meter, Qbyte_code_meter;
Jim Blandy's avatar
Jim Blandy committed
62 63
int byte_metering_on;

64
#define METER_2(code1, code2) \
Jim Blandy's avatar
Jim Blandy committed
65 66 67
  XFASTINT (XVECTOR (XVECTOR (Vbyte_code_meter)->contents[(code1)]) \
	    ->contents[(code2)])

68 69
#define METER_1(code) METER_2 (0, (code))

70 71 72 73 74 75 76 77 78 79
#define METER_CODE(last_code, this_code)				\
{									\
  if (byte_metering_on)							\
    {									\
      if (METER_1 (this_code) < MOST_POSITIVE_FIXNUM)			\
        METER_1 (this_code)++;						\
      if (last_code							\
	  && METER_2 (last_code, this_code) < MOST_POSITIVE_FIXNUM)	\
        METER_2 (last_code, this_code)++;				\
    }									\
80
}
Jim Blandy's avatar
Jim Blandy committed
81

82
#else /* no BYTE_CODE_METER */
Jim Blandy's avatar
Jim Blandy committed
83

84
#define METER_CODE(last_code, this_code)
Richard M. Stallman's avatar
Richard M. Stallman committed
85

86
#endif /* no BYTE_CODE_METER */
Jim Blandy's avatar
Jim Blandy committed
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


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
118
#define Bsymbol_function 0113
Jim Blandy's avatar
Jim Blandy committed
119
#define Bset 0114
120
#define Bfset 0115
Jim Blandy's avatar
Jim Blandy committed
121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140
#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
141 142
/* Was Bmark in v17.  */
#define Bsave_current_buffer 0141
Jim Blandy's avatar
Jim Blandy committed
143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158
#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
159
#define Bsave_current_buffer_1 0162 /* Replacing Bsave_current_buffer.  */
160
#define Bread_char 0162 /* No longer generated as of v19 */
Jim Blandy's avatar
Jim Blandy committed
161 162 163 164 165 166 167 168 169 170 171 172 173
#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
174
#define Bend_of_line 0177
Jim Blandy's avatar
Jim Blandy committed
175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197

#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

198 199 200 201 202 203
#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
204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221
#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

222 223 224 225 226 227 228 229 230 231
#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
232 233
#define Bconstant 0300
#define CONSTANTLIM 0100
Gerd Moellmann's avatar
Gerd Moellmann committed
234

235

Gerd Moellmann's avatar
Gerd Moellmann committed
236 237 238 239 240 241 242
/* Structure describing a value stack used during byte-code execution
   in Fbyte_code.  */

struct byte_stack
{
  /* Program counter.  This points into the byte_string below
     and is relocated when that string is relocated.  */
243
  const unsigned char *pc;
Gerd Moellmann's avatar
Gerd Moellmann committed
244 245 246 247 248 249 250 251 252

  /* Top and bottom of stack.  The bottom points to an area of memory
     allocated with alloca in Fbyte_code.  */
  Lisp_Object *top, *bottom;

  /* The string containing the byte-code, and its current address.
     Storing this here protects it from GC because mark_byte_stack
     marks it.  */
  Lisp_Object byte_string;
253
  const unsigned char *byte_string_start;
Gerd Moellmann's avatar
Gerd Moellmann committed
254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270

  /* The vector of constants used during byte-code execution.  Storing
     this here protects it from GC because mark_byte_stack marks it.  */
  Lisp_Object constants;

  /* Next entry in byte_stack_list.  */
  struct byte_stack *next;
};

/* A list of currently active byte-code execution value stacks.
   Fbyte_code adds an entry to the head of this list before it starts
   processing byte-code, and it removed the entry again when it is
   done.  Signalling an error truncates the list analoguous to
   gcprolist.  */

struct byte_stack *byte_stack_list;

271

Gerd Moellmann's avatar
Gerd Moellmann committed
272 273 274 275 276 277 278 279 280 281
/* Mark objects on byte_stack_list.  Called during GC.  */

void
mark_byte_stack ()
{
  struct byte_stack *stack;
  Lisp_Object *obj;

  for (stack = byte_stack_list; stack; stack = stack->next)
    {
282 283 284 285 286 287 288
      /* If STACK->top is null here, this means there's an opcode in
	 Fbyte_code that wasn't expected to GC, but did.  To find out
	 which opcode this is, record the value of `stack', and walk
	 up the stack in a debugger, stopping in frames of Fbyte_code.
	 The culprit is found in the frame of Fbyte_code where the
	 address of its local variable `stack' is equal to the
	 recorded value of `stack' here.  */
289
      eassert (stack->top);
290

Gerd Moellmann's avatar
Gerd Moellmann committed
291
      for (obj = stack->bottom; obj <= stack->top; ++obj)
292
	mark_object (*obj);
293

294 295
      mark_object (stack->byte_string);
      mark_object (stack->constants);
Gerd Moellmann's avatar
Gerd Moellmann committed
296 297 298 299
    }
}


300 301
/* Unmark objects in the stacks on byte_stack_list.  Relocate program
   counters.  Called when GC has completed.  */
Gerd Moellmann's avatar
Gerd Moellmann committed
302

303
void
304
unmark_byte_stack ()
Gerd Moellmann's avatar
Gerd Moellmann committed
305 306 307 308
{
  struct byte_stack *stack;

  for (stack = byte_stack_list; stack; stack = stack->next)
309
    {
310
      if (stack->byte_string_start != SDATA (stack->byte_string))
311 312
	{
	  int offset = stack->pc - stack->byte_string_start;
313
	  stack->byte_string_start = SDATA (stack->byte_string);
314 315 316
	  stack->pc = stack->byte_string_start + offset;
	}
    }
Gerd Moellmann's avatar
Gerd Moellmann committed
317 318
}

Jim Blandy's avatar
Jim Blandy committed
319 320 321

/* Fetch the next byte from the bytecode stream */

Gerd Moellmann's avatar
Gerd Moellmann committed
322
#define FETCH *stack.pc++
Jim Blandy's avatar
Jim Blandy committed
323

324 325
/* Fetch two bytes from the bytecode stream and make a 16-bit number
   out of them */
Jim Blandy's avatar
Jim Blandy committed
326 327 328

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

329 330 331 332
/* 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 */
Gerd Moellmann's avatar
Gerd Moellmann committed
333 334

#define PUSH(x) (top++, *top = (x))
Jim Blandy's avatar
Jim Blandy committed
335 336 337

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

Gerd Moellmann's avatar
Gerd Moellmann committed
338
#define POP (*top--)
Jim Blandy's avatar
Jim Blandy committed
339 340 341

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

Gerd Moellmann's avatar
Gerd Moellmann committed
342 343 344 345 346 347
#define DISCARD(n) (top -= (n))

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

#define TOP (*top)
Jim Blandy's avatar
Jim Blandy committed
348

349
/* Actions that must be performed before and after calling a function
Gerd Moellmann's avatar
Gerd Moellmann committed
350
   that might GC.  */
Jim Blandy's avatar
Jim Blandy committed
351

Gerd Moellmann's avatar
Gerd Moellmann committed
352 353
#define BEFORE_POTENTIAL_GC()	stack.top = top
#define AFTER_POTENTIAL_GC()	stack.top = NULL
Jim Blandy's avatar
Jim Blandy committed
354

Richard M. Stallman's avatar
Richard M. Stallman committed
355 356 357 358 359
/* 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)	\
360
    {						\
Gerd Moellmann's avatar
Gerd Moellmann committed
361
      BEFORE_POTENTIAL_GC ();			\
362
      Fgarbage_collect ();			\
Gerd Moellmann's avatar
Gerd Moellmann committed
363
      AFTER_POTENTIAL_GC ();			\
364 365 366
    }						\
  else

367
/* Check for jumping out of range.  */
Gerd Moellmann's avatar
Gerd Moellmann committed
368 369 370

#ifdef BYTE_CODE_SAFE

371
#define CHECK_RANGE(ARG) \
372 373
  if (ARG >= bytestr_length) abort ()

374
#else /* not BYTE_CODE_SAFE */
Gerd Moellmann's avatar
Gerd Moellmann committed
375 376 377

#define CHECK_RANGE(ARG)

378
#endif /* not BYTE_CODE_SAFE */
Gerd Moellmann's avatar
Gerd Moellmann committed
379

Gerd Moellmann's avatar
Gerd Moellmann committed
380 381 382 383 384 385 386
/* A version of the QUIT macro which makes sure that the stack top is
   set before signaling `quit'.  */

#define BYTE_CODE_QUIT					\
  do {							\
    if (!NILP (Vquit_flag) && NILP (Vinhibit_quit))	\
      {							\
387
        Lisp_Object flag = Vquit_flag;			\
Gerd Moellmann's avatar
Gerd Moellmann committed
388 389
	Vquit_flag = Qnil;				\
        BEFORE_POTENTIAL_GC ();				\
390 391
	if (EQ (Vthrow_on_input, flag))			\
	  Fthrow (Vthrow_on_input, Qnil);		\
Gerd Moellmann's avatar
Gerd Moellmann committed
392
	Fsignal (Qquit, Qnil);				\
393
	AFTER_POTENTIAL_GC ();				\
Gerd Moellmann's avatar
Gerd Moellmann committed
394 395 396
      }							\
  } while (0)

Gerd Moellmann's avatar
Gerd Moellmann committed
397

Jim Blandy's avatar
Jim Blandy committed
398
DEFUN ("byte-code", Fbyte_code, Sbyte_code, 3, 3, 0,
399 400 401 402 403 404
       doc: /* Function used internally in byte-compiled code.
The first argument, BYTESTR, is a string of byte code;
the second, VECTOR, a vector of constants;
the third, MAXDEPTH, the maximum stack depth used in this function.
If the third argument is incorrect, Emacs may crash.  */)
     (bytestr, vector, maxdepth)
Jim Blandy's avatar
Jim Blandy committed
405 406
     Lisp_Object bytestr, vector, maxdepth;
{
Juanma Barranquero's avatar
Juanma Barranquero committed
407
  int count = SPECPDL_INDEX ();
Jim Blandy's avatar
Jim Blandy committed
408 409 410 411
#ifdef BYTE_CODE_METER
  int this_op = 0;
  int prev_op;
#endif
Gerd Moellmann's avatar
Gerd Moellmann committed
412
  int op;
413
  /* Lisp_Object v1, v2; */
414
  Lisp_Object *vectorp;
Jim Blandy's avatar
Jim Blandy committed
415
#ifdef BYTE_CODE_SAFE
Gerd Moellmann's avatar
Gerd Moellmann committed
416 417
  int const_length = XVECTOR (vector)->size;
  Lisp_Object *stacke;
Jim Blandy's avatar
Jim Blandy committed
418
#endif
419
  int bytestr_length;
Gerd Moellmann's avatar
Gerd Moellmann committed
420 421
  struct byte_stack stack;
  Lisp_Object *top;
422
  Lisp_Object result;
Jim Blandy's avatar
Jim Blandy committed
423

424 425 426 427 428 429 430 431 432 433
#ifdef CHECK_FRAME_FONT
 {
   struct frame *f = SELECTED_FRAME ();
   if (FRAME_X_P (f)
       && FRAME_FONT (f)->direction != 0
       && FRAME_FONT (f)->direction != 1)
     abort ();
 }
#endif

434
  CHECK_STRING (bytestr);
435
  if (!VECTORP (vector))
Jim Blandy's avatar
Jim Blandy committed
436
    vector = wrong_type_argument (Qvectorp, vector);
437
  CHECK_NUMBER (maxdepth);
Jim Blandy's avatar
Jim Blandy committed
438

439 440 441 442 443
  if (STRING_MULTIBYTE (bytestr))
    /* BYTESTR must have been produced by Emacs 20.2 or the earlier
       because they produced a raw 8-bit string for byte-code and now
       such a byte-code string is loaded as multibyte while raw 8-bit
       characters converted to multibyte form.  Thus, now we must
444
       convert them back to the originally intended unibyte form.  */
445
    bytestr = Fstring_as_unibyte (bytestr);
446

447
  bytestr_length = SBYTES (bytestr);
448 449
  vectorp = XVECTOR (vector)->contents;

Gerd Moellmann's avatar
Gerd Moellmann committed
450
  stack.byte_string = bytestr;
451
  stack.pc = stack.byte_string_start = SDATA (bytestr);
Gerd Moellmann's avatar
Gerd Moellmann committed
452
  stack.constants = vector;
453
  stack.bottom = (Lisp_Object *) alloca (XFASTINT (maxdepth)
Gerd Moellmann's avatar
Gerd Moellmann committed
454 455 456 457 458
                                         * sizeof (Lisp_Object));
  top = stack.bottom - 1;
  stack.top = NULL;
  stack.next = byte_stack_list;
  byte_stack_list = &stack;
Jim Blandy's avatar
Jim Blandy committed
459

Gerd Moellmann's avatar
Gerd Moellmann committed
460 461 462
#ifdef BYTE_CODE_SAFE
  stacke = stack.bottom - 1 + XFASTINT (maxdepth);
#endif
463

Jim Blandy's avatar
Jim Blandy committed
464 465 466
  while (1)
    {
#ifdef BYTE_CODE_SAFE
467
      if (top > stacke)
468
	abort ();
Gerd Moellmann's avatar
Gerd Moellmann committed
469
      else if (top < stack.bottom - 1)
470
	abort ();
Jim Blandy's avatar
Jim Blandy committed
471 472 473 474 475 476 477
#endif

#ifdef BYTE_CODE_METER
      prev_op = this_op;
      this_op = op = FETCH;
      METER_CODE (prev_op, op);
#else
478
      op = FETCH;
Jim Blandy's avatar
Jim Blandy committed
479 480
#endif

481 482 483
      switch (op)
	{
	case Bvarref + 7:
Jim Blandy's avatar
Jim Blandy committed
484 485 486
	  op = FETCH2;
	  goto varref;

487 488 489
	case Bvarref:
	case Bvarref + 1:
	case Bvarref + 2:
490
	case Bvarref + 3:
491
	case Bvarref + 4:
492
	case Bvarref + 5:
Jim Blandy's avatar
Jim Blandy committed
493
	  op = op - Bvarref;
494 495 496 497 498 499
	  goto varref;

	/* This seems to be the most frequently executed byte-code
	   among the Bvarref's, so avoid a goto here.  */
	case Bvarref+6:
	  op = FETCH;
Jim Blandy's avatar
Jim Blandy committed
500
	varref:
501 502 503 504 505 506
	  {
	    Lisp_Object v1, v2;

	    v1 = vectorp[op];
	    if (SYMBOLP (v1))
	      {
507
		v2 = SYMBOL_VALUE (v1);
508
		if (MISCP (v2) || EQ (v2, Qunbound))
509 510 511 512 513
		  {
		    BEFORE_POTENTIAL_GC ();
		    v2 = Fsymbol_value (v1);
		    AFTER_POTENTIAL_GC ();
		  }
514 515
	      }
	    else
516 517 518 519 520
	      {
		BEFORE_POTENTIAL_GC ();
		v2 = Fsymbol_value (v1);
		AFTER_POTENTIAL_GC ();
	      }
521 522 523 524 525 526 527 528
	    PUSH (v2);
	    break;
	  }

	case Bgotoifnil:
	  MAYBE_GC ();
	  op = FETCH2;
	  if (NILP (POP))
Jim Blandy's avatar
Jim Blandy committed
529
	    {
Gerd Moellmann's avatar
Gerd Moellmann committed
530
	      BYTE_CODE_QUIT;
531 532
	      CHECK_RANGE (op);
	      stack.pc = stack.byte_string_start + op;
Jim Blandy's avatar
Jim Blandy committed
533 534 535
	    }
	  break;

536 537 538 539
	case Bcar:
	  {
	    Lisp_Object v1;
	    v1 = TOP;
540 541 542 543 544
	    if (CONSP (v1))
	      TOP = XCAR (v1);
	    else if (NILP (v1))
	      TOP = Qnil;
	    else
545
	      {
546
		wrong_type_argument (Qlistp, v1);
547
	      }
548 549 550 551 552 553 554 555 556 557 558 559 560 561
	    break;
	  }

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

	case Bmemq:
	  {
	    Lisp_Object v1;
562
	    BEFORE_POTENTIAL_GC ();
563 564
	    v1 = POP;
	    TOP = Fmemq (TOP, v1);
565
	    AFTER_POTENTIAL_GC ();
566 567 568 569 570 571 572
	    break;
	  }

	case Bcdr:
	  {
	    Lisp_Object v1;
	    v1 = TOP;
573 574 575 576 577
	    if (CONSP (v1))
	      TOP = XCDR (v1);
	    else if (NILP (v1))
	      TOP = Qnil;
	    else
578
	      {
579
		wrong_type_argument (Qlistp, v1);
580
	      }
581 582
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
583

584 585 586 587 588 589 590
	case Bvarset:
	case Bvarset+1:
	case Bvarset+2:
	case Bvarset+3:
	case Bvarset+4:
	case Bvarset+5:
	  op -= Bvarset;
Jim Blandy's avatar
Jim Blandy committed
591 592
	  goto varset;

593 594
	case Bvarset+7:
	  op = FETCH2;
595 596 597 598
	  goto varset;

	case Bvarset+6:
	  op = FETCH;
Jim Blandy's avatar
Jim Blandy committed
599
	varset:
600 601
	  {
	    Lisp_Object sym, val;
602

603
	    sym = vectorp[op];
604
	    val = TOP;
605 606 607 608

	    /* Inline the most common case.  */
	    if (SYMBOLP (sym)
		&& !EQ (val, Qunbound)
609 610 611
		&& !XSYMBOL (sym)->indirect_variable
		&& !XSYMBOL (sym)->constant
		&& !MISCP (XSYMBOL (sym)->value))
612 613
	      XSYMBOL (sym)->value = val;
	    else
614 615 616 617 618
	      {
		BEFORE_POTENTIAL_GC ();
		set_internal (sym, val, current_buffer, 0);
		AFTER_POTENTIAL_GC ();
	      }
619
	  }
620
	  (void) POP;
Jim Blandy's avatar
Jim Blandy committed
621 622
	  break;

623 624 625 626 627 628 629 630 631 632
	case Bdup:
	  {
	    Lisp_Object v1;
	    v1 = TOP;
	    PUSH (v1);
	    break;
	  }

	/* ------------------ */

Jim Blandy's avatar
Jim Blandy committed
633 634 635 636 637 638 639 640
	case Bvarbind+6:
	  op = FETCH;
	  goto varbind;

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

641 642 643 644 645 646
	case Bvarbind:
	case Bvarbind+1:
	case Bvarbind+2:
	case Bvarbind+3:
	case Bvarbind+4:
	case Bvarbind+5:
Jim Blandy's avatar
Jim Blandy committed
647 648
	  op -= Bvarbind;
	varbind:
649 650
	  /* Specbind can signal and thus GC.  */
	  BEFORE_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
651
	  specbind (vectorp[op], POP);
652
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
653 654 655 656 657 658 659 660 661 662
	  break;

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

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

663 664 665 666 667 668
	case Bcall:
	case Bcall+1:
	case Bcall+2:
	case Bcall+3:
	case Bcall+4:
	case Bcall+5:
Jim Blandy's avatar
Jim Blandy committed
669 670
	  op -= Bcall;
	docall:
671
	  {
672
	    BEFORE_POTENTIAL_GC ();
673
	    DISCARD (op);
674
#ifdef BYTE_CODE_METER
675 676 677 678 679 680 681
	    if (byte_metering_on && SYMBOLP (TOP))
	      {
		Lisp_Object v1, v2;

		v1 = TOP;
		v2 = Fget (v1, Qbyte_code_meter);
		if (INTEGERP (v2)
682
		    && XINT (v2) < MOST_POSITIVE_FIXNUM)
683 684 685 686 687
		  {
		    XSETINT (v2, XINT (v2) + 1);
		    Fput (v1, Qbyte_code_meter, v2);
		  }
	      }
688
#endif
689 690 691 692
	    TOP = Ffuncall (op + 1, &TOP);
	    AFTER_POTENTIAL_GC ();
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
693 694 695 696 697 698 699 700 701

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

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

702 703 704 705 706 707
	case Bunbind:
	case Bunbind+1:
	case Bunbind+2:
	case Bunbind+3:
	case Bunbind+4:
	case Bunbind+5:
Jim Blandy's avatar
Jim Blandy committed
708 709
	  op -= Bunbind;
	dounbind:
Gerd Moellmann's avatar
Gerd Moellmann committed
710
	  BEFORE_POTENTIAL_GC ();
Juanma Barranquero's avatar
Juanma Barranquero committed
711
	  unbind_to (SPECPDL_INDEX () - op, Qnil);
Gerd Moellmann's avatar
Gerd Moellmann committed
712
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
713 714 715 716
	  break;

	case Bunbind_all:
	  /* To unbind back to the beginning of this frame.  Not used yet,
717
	     but will be needed for tail-recursion elimination.  */
Gerd Moellmann's avatar
Gerd Moellmann committed
718
	  BEFORE_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
719
	  unbind_to (count, Qnil);
Gerd Moellmann's avatar
Gerd Moellmann committed
720
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
721 722 723
	  break;

	case Bgoto:
Richard M. Stallman's avatar
Richard M. Stallman committed
724
	  MAYBE_GC ();
Gerd Moellmann's avatar
Gerd Moellmann committed
725
	  BYTE_CODE_QUIT;
Jim Blandy's avatar
Jim Blandy committed
726
	  op = FETCH2;    /* pc = FETCH2 loses since FETCH2 contains pc++ */
727
	  CHECK_RANGE (op);
Gerd Moellmann's avatar
Gerd Moellmann committed
728
	  stack.pc = stack.byte_string_start + op;
Jim Blandy's avatar
Jim Blandy committed
729 730 731
	  break;

	case Bgotoifnonnil:
Richard M. Stallman's avatar
Richard M. Stallman committed
732
	  MAYBE_GC ();
Jim Blandy's avatar
Jim Blandy committed
733
	  op = FETCH2;
Joseph Arceneaux's avatar
Joseph Arceneaux committed
734
	  if (!NILP (POP))
Jim Blandy's avatar
Jim Blandy committed
735
	    {
Gerd Moellmann's avatar
Gerd Moellmann committed
736
	      BYTE_CODE_QUIT;
737
	      CHECK_RANGE (op);
Gerd Moellmann's avatar
Gerd Moellmann committed
738
	      stack.pc = stack.byte_string_start + op;
Jim Blandy's avatar
Jim Blandy committed
739 740 741 742
	    }
	  break;

	case Bgotoifnilelsepop:
Richard M. Stallman's avatar
Richard M. Stallman committed
743
	  MAYBE_GC ();
Jim Blandy's avatar
Jim Blandy committed
744
	  op = FETCH2;
Joseph Arceneaux's avatar
Joseph Arceneaux committed
745
	  if (NILP (TOP))
Jim Blandy's avatar
Jim Blandy committed
746
	    {
Gerd Moellmann's avatar
Gerd Moellmann committed
747
	      BYTE_CODE_QUIT;
748
	      CHECK_RANGE (op);
Gerd Moellmann's avatar
Gerd Moellmann committed
749
	      stack.pc = stack.byte_string_start + op;
Jim Blandy's avatar
Jim Blandy committed
750
	    }
751
	  else DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
752 753 754
	  break;

	case Bgotoifnonnilelsepop:
Richard M. Stallman's avatar
Richard M. Stallman committed
755
	  MAYBE_GC ();
Jim Blandy's avatar
Jim Blandy committed
756
	  op = FETCH2;
Joseph Arceneaux's avatar
Joseph Arceneaux committed
757
	  if (!NILP (TOP))
Jim Blandy's avatar
Jim Blandy committed
758
	    {
Gerd Moellmann's avatar
Gerd Moellmann committed
759
	      BYTE_CODE_QUIT;
760
	      CHECK_RANGE (op);
Gerd Moellmann's avatar
Gerd Moellmann committed
761
	      stack.pc = stack.byte_string_start + op;
Jim Blandy's avatar
Jim Blandy committed
762
	    }
763 764 765 766
	  else DISCARD (1);
	  break;

	case BRgoto:
Richard M. Stallman's avatar
Richard M. Stallman committed
767
	  MAYBE_GC ();
Gerd Moellmann's avatar
Gerd Moellmann committed
768
	  BYTE_CODE_QUIT;
Gerd Moellmann's avatar
Gerd Moellmann committed
769
	  stack.pc += (int) *stack.pc - 127;
770 771 772
	  break;

	case BRgotoifnil:
Richard M. Stallman's avatar
Richard M. Stallman committed
773
	  MAYBE_GC ();
774 775
	  if (NILP (POP))
	    {
Gerd Moellmann's avatar
Gerd Moellmann committed
776
	      BYTE_CODE_QUIT;
Gerd Moellmann's avatar
Gerd Moellmann committed
777
	      stack.pc += (int) *stack.pc - 128;
778
	    }
Gerd Moellmann's avatar
Gerd Moellmann committed
779
	  stack.pc++;
780 781 782
	  break;

	case BRgotoifnonnil:
Richard M. Stallman's avatar
Richard M. Stallman committed
783
	  MAYBE_GC ();
784 785
	  if (!NILP (POP))
	    {
Gerd Moellmann's avatar
Gerd Moellmann committed
786
	      BYTE_CODE_QUIT;
Gerd Moellmann's avatar
Gerd Moellmann committed
787
	      stack.pc += (int) *stack.pc - 128;
788
	    }
Gerd Moellmann's avatar
Gerd Moellmann committed
789
	  stack.pc++;
790 791 792
	  break;

	case BRgotoifnilelsepop:
Richard M. Stallman's avatar
Richard M. Stallman committed
793
	  MAYBE_GC ();
Gerd Moellmann's avatar
Gerd Moellmann committed
794
	  op = *stack.pc++;
795 796
	  if (NILP (TOP))
	    {
Gerd Moellmann's avatar
Gerd Moellmann committed
797
	      BYTE_CODE_QUIT;
Gerd Moellmann's avatar
Gerd Moellmann committed
798
	      stack.pc += op - 128;
799 800 801 802 803
	    }
	  else DISCARD (1);
	  break;

	case BRgotoifnonnilelsepop:
Richard M. Stallman's avatar
Richard M. Stallman committed
804
	  MAYBE_GC ();
Gerd Moellmann's avatar
Gerd Moellmann committed
805
	  op = *stack.pc++;
806 807
	  if (!NILP (TOP))
	    {
Gerd Moellmann's avatar
Gerd Moellmann committed
808
	      BYTE_CODE_QUIT;
Gerd Moellmann's avatar
Gerd Moellmann committed
809
	      stack.pc += op - 128;
810 811
	    }
	  else DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
812 813
	  break;

Jim Blandy's avatar
Jim Blandy committed
814
	case Breturn:
815
	  result = POP;
Jim Blandy's avatar
Jim Blandy committed
816 817 818
	  goto exit;

	case Bdiscard:
819
	  DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
820 821 822 823 824 825 826
	  break;

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

	case Bsave_excursion:
827 828
	  record_unwind_protect (save_excursion_restore,
				 save_excursion_save ());
Jim Blandy's avatar
Jim Blandy committed
829 830
	  break;

831
	case Bsave_current_buffer:
Richard M. Stallman's avatar
Richard M. Stallman committed
832
	case Bsave_current_buffer_1:
833
	  record_unwind_protect (set_buffer_if_live, Fcurrent_buffer ());
834 835
	  break;

Jim Blandy's avatar
Jim Blandy committed
836
	case Bsave_window_excursion:
837
	  BEFORE_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
838
	  TOP = Fsave_window_excursion (TOP);
839
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
840 841 842
	  break;

	case Bsave_restriction:
843 844
	  record_unwind_protect (save_restriction_restore,
				 save_restriction_save ());
Jim Blandy's avatar
Jim Blandy committed
845 846 847
	  break;

	case Bcatch:
848 849 850
	  {
	    Lisp_Object v1;
	    BEFORE_POTENTIAL_GC ();
851
	    v1 = POP;
852 853 854 855
	    TOP = internal_catch (TOP, Feval, v1);
	    AFTER_POTENTIAL_GC ();
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
856 857

	case Bunwind_protect:
858
	  record_unwind_protect (Fprogn, POP);
Jim Blandy's avatar
Jim Blandy committed
859 860 861
	  break;

	case Bcondition_case:
862 863 864 865 866 867 868 869 870
	  {
	    Lisp_Object v1;
	    v1 = POP;
	    v1 = Fcons (POP, v1);
	    BEFORE_POTENTIAL_GC ();
	    TOP = Fcondition_case (Fcons (TOP, v1));
	    AFTER_POTENTIAL_GC ();
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
871 872

	case Btemp_output_buffer_setup:
873
	  BEFORE_POTENTIAL_GC ();
874
	  CHECK_STRING (TOP);
875
	  temp_output_buffer_setup (SDATA (TOP));
876
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
877 878 879 880
	  TOP = Vstandard_output;
	  break;

	case Btemp_output_buffer_show:
881 882 883
	  {
	    Lisp_Object v1;
	    BEFORE_POTENTIAL_GC ();
884
	    v1 = POP;
885 886 887
	    temp_output_buffer_show (TOP);
	    TOP = v1;
	    /* pop binding of standard-output */
Juanma Barranquero's avatar
Juanma Barranquero committed
888
	    unbind_to (SPECPDL_INDEX () - 1, Qnil);
889 890 891
	    AFTER_POTENTIAL_GC ();
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
892 893

	case Bnth:
894 895
	  {
	    Lisp_Object v1, v2;
896
	    BEFORE_POTENTIAL_GC ();
897 898
	    v1 = POP;
	    v2 = TOP;
899
	    CHECK_NUMBER (v2);
900
	    AFTER_POTENTIAL_GC ();
901 902 903 904 905 906 907 908 909
	    op = XINT (v2);
	    immediate_quit = 1;
	    while (--op >= 0)
	      {
		if (CONSP (v1))
		  v1 = XCDR (v1);
		else if (!NILP (v1))
		  {
		    immediate_quit = 0;
910
		    wrong_type_argument (Qlistp, v1);
911 912 913
		  }
	      }
	    immediate_quit = 0;
914 915 916 917 918
	    if (CONSP (v1))
	      TOP = XCAR (v1);
	    else if (NILP (v1))
	      TOP = Qnil;
	    else
919
	      wrong_type_argument (Qlistp, v1);
920 921
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
922 923

	case Bsymbolp:
924
	  TOP = SYMBOLP (TOP) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
925 926 927 928 929 930 931
	  break;

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

	case Bstringp:
932
	  TOP = STRINGP (TOP) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
933 934 935
	  break;

	case Blistp:
Joseph Arceneaux's avatar
Joseph Arceneaux committed
936
	  TOP = CONSP (TOP) || NILP (TOP) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
937 938 939
	  break;

	case Bnot:
Joseph Arceneaux's avatar
Joseph Arceneaux committed
940
	  TOP = NILP (TOP) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
941 942 943
	  break;

	case Bcons:
944 945 946 947 948 949
	  {
	    Lisp_Object v1;
	    v1 = POP;
	    TOP = Fcons (TOP, v1);
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
950 951 952 953 954 955

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

	case Blist2:
956 957 958 959 960 961
	  {
	    Lisp_Object v1;
	    v1 = POP;
	    TOP = Fcons (TOP, Fcons (v1, Qnil));
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
962 963

	case Blist3:
964
	  DISCARD (2);
Jim Blandy's avatar
Jim Blandy committed
965 966 967 968
	  TOP = Flist (3, &TOP);
	  break;

	case Blist4:
969
	  DISCARD (3);
Jim Blandy's avatar
Jim Blandy committed
970 971 972
	  TOP = Flist (4, &TOP);
	  break;

973 974 975 976 977 978
	case BlistN:
	  op = FETCH;
	  DISCARD (op - 1);
	  TOP = Flist (op, &TOP);
	  break;

Jim Blandy's avatar
Jim Blandy committed
979
	case Blength:
980
	  BEFORE_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
981
	  TOP = Flength (TOP);
982
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
983 984 985
	  break;

	case Baref:
986 987
	  {
	    Lisp_Object v1;
988
	    BEFORE_POTENTIAL_GC ();
989 990
	    v1 = POP;
	    TOP = Faref (TOP, v1);
991
	    AFTER_POTENTIAL_GC ();
992 993
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
994 995

	case Baset:
996 997
	  {
	    Lisp_Object v1, v2;