bytecode.c 33.4 KB
Newer Older
Jim Blandy's avatar
Jim Blandy committed
1
/* Execution of byte code produced by bytecomp.el.
2
   Copyright (C) 1985-1988, 1993, 2000-2011 Free Software Foundation, Inc.
Jim Blandy's avatar
Jim Blandy committed
3 4 5

This file is part of GNU Emacs.

6
GNU Emacs is free software: you can redistribute it and/or modify
Jim Blandy's avatar
Jim Blandy committed
7
it under the terms of the GNU General Public License as published by
8 9
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Jim Blandy's avatar
Jim Blandy committed
10 11 12 13 14 15 16

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
17
along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
Jim Blandy's avatar
Jim Blandy committed
18

19
/*
20
hacked on by jwz@lucid.com 17-jun-91
Jim Blandy's avatar
Jim Blandy committed
21 22
  o  added a compile-time switch to turn on simple sanity checking;
  o  put back the obsolete byte-codes for error-detection;
23
  o  added a new instruction, unbind_all, which I will use for
Jim Blandy's avatar
Jim Blandy committed
24
     tail-recursion elimination;
25
  o  made temp_output_buffer_show be called with the right number
Jim Blandy's avatar
Jim Blandy committed
26 27 28 29 30
     of args;
  o  made the new bytecodes be called with args in the right order;
  o  added metering support.

by Hallvard:
31
  o  added relative jump instructions;
Jim Blandy's avatar
Jim Blandy committed
32 33 34
  o  all conditionals now only do QUIT if they jump.
 */

35
#include <config.h>
36
#include <setjmp.h>
Jim Blandy's avatar
Jim Blandy committed
37 38
#include "lisp.h"
#include "buffer.h"
39
#include "character.h"
Jim Blandy's avatar
Jim Blandy committed
40
#include "syntax.h"
Stefan Monnier's avatar
Stefan Monnier committed
41
#include "window.h"
Jim Blandy's avatar
Jim Blandy committed
42

43 44 45 46 47
#ifdef CHECK_FRAME_FONT
#include "frame.h"
#include "xterm.h"
#endif

48
/*
49
 * define BYTE_CODE_SAFE to enable some minor sanity checking (useful for
50 51
 * debugging the byte compiler...)
 *
52
 * define BYTE_CODE_METER to enable generation of a byte-op usage histogram.
Jim Blandy's avatar
Jim Blandy committed
53
 */
54 55
/* #define BYTE_CODE_SAFE */
/* #define BYTE_CODE_METER */
Jim Blandy's avatar
Jim Blandy committed
56 57 58 59


#ifdef BYTE_CODE_METER

60
Lisp_Object Qbyte_code_meter;
61
#define METER_2(code1, code2) \
Jim Blandy's avatar
Jim Blandy committed
62 63 64
  XFASTINT (XVECTOR (XVECTOR (Vbyte_code_meter)->contents[(code1)]) \
	    ->contents[(code2)])

65 66
#define METER_1(code) METER_2 (0, (code))

67 68 69 70 71 72 73 74 75 76
#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)++;				\
    }									\
77
}
Jim Blandy's avatar
Jim Blandy committed
78

79
#else /* no BYTE_CODE_METER */
Jim Blandy's avatar
Jim Blandy committed
80

81
#define METER_CODE(last_code, this_code)
Richard M. Stallman's avatar
Richard M. Stallman committed
82

83
#endif /* no BYTE_CODE_METER */
Jim Blandy's avatar
Jim Blandy committed
84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114


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
115
#define Bsymbol_function 0113
Jim Blandy's avatar
Jim Blandy committed
116
#define Bset 0114
117
#define Bfset 0115
Jim Blandy's avatar
Jim Blandy committed
118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137
#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
138 139
/* Was Bmark in v17.  */
#define Bsave_current_buffer 0141
Jim Blandy's avatar
Jim Blandy committed
140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155
#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
156
#define Bsave_current_buffer_1 0162 /* Replacing Bsave_current_buffer.  */
157
#define Bread_char 0162 /* No longer generated as of v19 */
Jim Blandy's avatar
Jim Blandy committed
158 159 160 161 162 163 164 165 166 167 168 169 170
#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
171
#define Bend_of_line 0177
Jim Blandy's avatar
Jim Blandy committed
172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194

#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

195 196 197 198 199 200
#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
201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218
#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

219 220 221 222 223 224 225 226 227 228
#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
229 230
#define Bconstant 0300
#define CONSTANTLIM 0100
Gerd Moellmann's avatar
Gerd Moellmann committed
231

232

Gerd Moellmann's avatar
Gerd Moellmann committed
233 234 235 236 237 238 239
/* 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.  */
240
  const unsigned char *pc;
Gerd Moellmann's avatar
Gerd Moellmann committed
241 242 243 244 245 246 247 248 249

  /* 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;
250
  const unsigned char *byte_string_start;
Gerd Moellmann's avatar
Gerd Moellmann committed
251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267

  /* 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;

268

Gerd Moellmann's avatar
Gerd Moellmann committed
269 270 271
/* Mark objects on byte_stack_list.  Called during GC.  */

void
272
mark_byte_stack (void)
Gerd Moellmann's avatar
Gerd Moellmann committed
273 274 275 276 277 278
{
  struct byte_stack *stack;
  Lisp_Object *obj;

  for (stack = byte_stack_list; stack; stack = stack->next)
    {
279 280 281 282 283 284 285
      /* 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.  */
Kenichi Handa's avatar
Kenichi Handa committed
286
      eassert (stack->top);
287

Gerd Moellmann's avatar
Gerd Moellmann committed
288
      for (obj = stack->bottom; obj <= stack->top; ++obj)
Kenichi Handa's avatar
Kenichi Handa committed
289
	mark_object (*obj);
290

Kenichi Handa's avatar
Kenichi Handa committed
291 292
      mark_object (stack->byte_string);
      mark_object (stack->constants);
Gerd Moellmann's avatar
Gerd Moellmann committed
293 294 295 296
    }
}


297 298
/* Unmark objects in the stacks on byte_stack_list.  Relocate program
   counters.  Called when GC has completed.  */
Gerd Moellmann's avatar
Gerd Moellmann committed
299

300
void
301
unmark_byte_stack (void)
Gerd Moellmann's avatar
Gerd Moellmann committed
302 303 304 305
{
  struct byte_stack *stack;

  for (stack = byte_stack_list; stack; stack = stack->next)
306
    {
307
      if (stack->byte_string_start != SDATA (stack->byte_string))
308 309
	{
	  int offset = stack->pc - stack->byte_string_start;
310
	  stack->byte_string_start = SDATA (stack->byte_string);
311 312 313
	  stack->pc = stack->byte_string_start + offset;
	}
    }
Gerd Moellmann's avatar
Gerd Moellmann committed
314 315
}

Jim Blandy's avatar
Jim Blandy committed
316 317 318

/* Fetch the next byte from the bytecode stream */

Gerd Moellmann's avatar
Gerd Moellmann committed
319
#define FETCH *stack.pc++
Jim Blandy's avatar
Jim Blandy committed
320

321 322
/* Fetch two bytes from the bytecode stream and make a 16-bit number
   out of them */
Jim Blandy's avatar
Jim Blandy committed
323 324 325

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

326 327 328 329
/* 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
330 331

#define PUSH(x) (top++, *top = (x))
Jim Blandy's avatar
Jim Blandy committed
332 333 334

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

Gerd Moellmann's avatar
Gerd Moellmann committed
335
#define POP (*top--)
Jim Blandy's avatar
Jim Blandy committed
336 337 338

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

Gerd Moellmann's avatar
Gerd Moellmann committed
339 340 341 342 343 344
#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
345

346
/* Actions that must be performed before and after calling a function
Gerd Moellmann's avatar
Gerd Moellmann committed
347
   that might GC.  */
Jim Blandy's avatar
Jim Blandy committed
348

Gerd Moellmann's avatar
Gerd Moellmann committed
349 350
#define BEFORE_POTENTIAL_GC()	stack.top = top
#define AFTER_POTENTIAL_GC()	stack.top = NULL
Jim Blandy's avatar
Jim Blandy committed
351

Richard M. Stallman's avatar
Richard M. Stallman committed
352 353 354
/* Garbage collect if we have consed enough since the last time.
   We do this at every branch, to avoid loops that never GC.  */

355 356 357 358 359 360 361 362
#define MAYBE_GC()					\
  if (consing_since_gc > gc_cons_threshold		\
      && consing_since_gc > gc_relative_threshold)	\
    {							\
      BEFORE_POTENTIAL_GC ();				\
      Fgarbage_collect ();				\
      AFTER_POTENTIAL_GC ();				\
    }							\
363 364
  else

365
/* Check for jumping out of range.  */
Gerd Moellmann's avatar
Gerd Moellmann committed
366 367 368

#ifdef BYTE_CODE_SAFE

369
#define CHECK_RANGE(ARG) \
370 371
  if (ARG >= bytestr_length) abort ()

372
#else /* not BYTE_CODE_SAFE */
Gerd Moellmann's avatar
Gerd Moellmann committed
373 374 375

#define CHECK_RANGE(ARG)

376
#endif /* not BYTE_CODE_SAFE */
Gerd Moellmann's avatar
Gerd Moellmann committed
377

Gerd Moellmann's avatar
Gerd Moellmann committed
378 379 380 381 382 383 384
/* 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))	\
      {							\
385
        Lisp_Object flag = Vquit_flag;			\
Gerd Moellmann's avatar
Gerd Moellmann committed
386 387
	Vquit_flag = Qnil;				\
        BEFORE_POTENTIAL_GC ();				\
388
	if (EQ (Vthrow_on_input, flag))			\
389
	  Fthrow (Vthrow_on_input, Qt);			\
Gerd Moellmann's avatar
Gerd Moellmann committed
390
	Fsignal (Qquit, Qnil);				\
391
	AFTER_POTENTIAL_GC ();				\
Gerd Moellmann's avatar
Gerd Moellmann committed
392
      }							\
393
    ELSE_PENDING_SIGNALS				\
Gerd Moellmann's avatar
Gerd Moellmann committed
394 395
  } while (0)

Gerd Moellmann's avatar
Gerd Moellmann committed
396

Jim Blandy's avatar
Jim Blandy committed
397
DEFUN ("byte-code", Fbyte_code, Sbyte_code, 3, 3, 0,
398 399 400 401 402
       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.  */)
Dan Nicolaescu's avatar
Dan Nicolaescu committed
403
  (Lisp_Object bytestr, Lisp_Object vector, Lisp_Object maxdepth)
Jim Blandy's avatar
Jim Blandy committed
404
{
Juanma Barranquero's avatar
Juanma Barranquero committed
405
  int count = SPECPDL_INDEX ();
Jim Blandy's avatar
Jim Blandy committed
406 407 408 409
#ifdef BYTE_CODE_METER
  int this_op = 0;
  int prev_op;
#endif
Gerd Moellmann's avatar
Gerd Moellmann committed
410
  int op;
411
  /* Lisp_Object v1, v2; */
412
  Lisp_Object *vectorp;
Jim Blandy's avatar
Jim Blandy committed
413
#ifdef BYTE_CODE_SAFE
Gerd Moellmann's avatar
Gerd Moellmann committed
414 415
  int const_length = XVECTOR (vector)->size;
  Lisp_Object *stacke;
Jim Blandy's avatar
Jim Blandy committed
416
#endif
417
  int bytestr_length;
Gerd Moellmann's avatar
Gerd Moellmann committed
418 419
  struct byte_stack stack;
  Lisp_Object *top;
420
  Lisp_Object result;
Jim Blandy's avatar
Jim Blandy committed
421

422
#if 0 /* CHECK_FRAME_FONT */
423 424 425 426 427 428 429 430 431
 {
   struct frame *f = SELECTED_FRAME ();
   if (FRAME_X_P (f)
       && FRAME_FONT (f)->direction != 0
       && FRAME_FONT (f)->direction != 1)
     abort ();
 }
#endif

432
  CHECK_STRING (bytestr);
Kim F. Storm's avatar
Kim F. Storm committed
433
  CHECK_VECTOR (vector);
434
  CHECK_NUMBER (maxdepth);
Jim Blandy's avatar
Jim Blandy committed
435

436 437 438 439 440
  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
441
       convert them back to the originally intended unibyte form.  */
442
    bytestr = Fstring_as_unibyte (bytestr);
443

444
  bytestr_length = SBYTES (bytestr);
445 446
  vectorp = XVECTOR (vector)->contents;

Gerd Moellmann's avatar
Gerd Moellmann committed
447
  stack.byte_string = bytestr;
448
  stack.pc = stack.byte_string_start = SDATA (bytestr);
Gerd Moellmann's avatar
Gerd Moellmann committed
449
  stack.constants = vector;
450
  stack.bottom = (Lisp_Object *) alloca (XFASTINT (maxdepth)
Gerd Moellmann's avatar
Gerd Moellmann committed
451 452 453 454 455
                                         * 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
456

Gerd Moellmann's avatar
Gerd Moellmann committed
457 458 459
#ifdef BYTE_CODE_SAFE
  stacke = stack.bottom - 1 + XFASTINT (maxdepth);
#endif
460

Jim Blandy's avatar
Jim Blandy committed
461 462 463
  while (1)
    {
#ifdef BYTE_CODE_SAFE
464
      if (top > stacke)
465
	abort ();
Gerd Moellmann's avatar
Gerd Moellmann committed
466
      else if (top < stack.bottom - 1)
467
	abort ();
Jim Blandy's avatar
Jim Blandy committed
468 469 470 471 472 473 474
#endif

#ifdef BYTE_CODE_METER
      prev_op = this_op;
      this_op = op = FETCH;
      METER_CODE (prev_op, op);
#else
475
      op = FETCH;
Jim Blandy's avatar
Jim Blandy committed
476 477
#endif

478 479 480
      switch (op)
	{
	case Bvarref + 7:
Jim Blandy's avatar
Jim Blandy committed
481 482 483
	  op = FETCH2;
	  goto varref;

484 485 486
	case Bvarref:
	case Bvarref + 1:
	case Bvarref + 2:
487
	case Bvarref + 3:
488
	case Bvarref + 4:
489
	case Bvarref + 5:
Jim Blandy's avatar
Jim Blandy committed
490
	  op = op - Bvarref;
491 492 493 494 495 496
	  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
497
	varref:
498 499 500 501 502 503
	  {
	    Lisp_Object v1, v2;

	    v1 = vectorp[op];
	    if (SYMBOLP (v1))
	      {
504 505 506
		if (XSYMBOL (v1)->redirect != SYMBOL_PLAINVAL
		    || (v2 = SYMBOL_VAL (XSYMBOL (v1)),
			EQ (v2, Qunbound)))
507 508 509 510 511
		  {
		    BEFORE_POTENTIAL_GC ();
		    v2 = Fsymbol_value (v1);
		    AFTER_POTENTIAL_GC ();
		  }
512 513
	      }
	    else
514 515 516 517 518
	      {
		BEFORE_POTENTIAL_GC ();
		v2 = Fsymbol_value (v1);
		AFTER_POTENTIAL_GC ();
	      }
519 520 521 522 523
	    PUSH (v2);
	    break;
	  }

	case Bgotoifnil:
524 525 526 527 528 529 530 531 532 533 534 535 536
	  {
	    Lisp_Object v1;
	    MAYBE_GC ();
	    op = FETCH2;
	    v1 = POP;
	    if (NILP (v1))
	      {
		BYTE_CODE_QUIT;
		CHECK_RANGE (op);
		stack.pc = stack.byte_string_start + op;
	      }
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
537

538 539 540 541
	case Bcar:
	  {
	    Lisp_Object v1;
	    v1 = TOP;
542
	    TOP = CAR (v1);
543 544 545 546 547 548 549 550 551 552 553 554 555 556
	    break;
	  }

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

	case Bmemq:
	  {
	    Lisp_Object v1;
557
	    BEFORE_POTENTIAL_GC ();
558 559
	    v1 = POP;
	    TOP = Fmemq (TOP, v1);
560
	    AFTER_POTENTIAL_GC ();
561 562 563 564 565 566 567
	    break;
	  }

	case Bcdr:
	  {
	    Lisp_Object v1;
	    v1 = TOP;
568
	    TOP = CDR (v1);
569 570
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
571

572 573 574 575 576 577 578
	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
579 580
	  goto varset;

581 582
	case Bvarset+7:
	  op = FETCH2;
583 584 585 586
	  goto varset;

	case Bvarset+6:
	  op = FETCH;
Jim Blandy's avatar
Jim Blandy committed
587
	varset:
588 589
	  {
	    Lisp_Object sym, val;
590

591
	    sym = vectorp[op];
592
	    val = TOP;
593 594 595 596

	    /* Inline the most common case.  */
	    if (SYMBOLP (sym)
		&& !EQ (val, Qunbound)
597 598 599
		&& !XSYMBOL (sym)->redirect
		&& !SYMBOL_CONSTANT_P (sym))
	      XSYMBOL (sym)->val.value = val;
600
	    else
601 602
	      {
		BEFORE_POTENTIAL_GC ();
603
		set_internal (sym, val, Qnil, 0);
604 605
		AFTER_POTENTIAL_GC ();
	      }
606
	  }
607
	  (void) POP;
Jim Blandy's avatar
Jim Blandy committed
608 609
	  break;

610 611 612 613 614 615 616 617 618 619
	case Bdup:
	  {
	    Lisp_Object v1;
	    v1 = TOP;
	    PUSH (v1);
	    break;
	  }

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

Jim Blandy's avatar
Jim Blandy committed
620 621 622 623 624 625 626 627
	case Bvarbind+6:
	  op = FETCH;
	  goto varbind;

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

628 629 630 631 632 633
	case Bvarbind:
	case Bvarbind+1:
	case Bvarbind+2:
	case Bvarbind+3:
	case Bvarbind+4:
	case Bvarbind+5:
Jim Blandy's avatar
Jim Blandy committed
634 635
	  op -= Bvarbind;
	varbind:
636 637
	  /* Specbind can signal and thus GC.  */
	  BEFORE_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
638
	  specbind (vectorp[op], POP);
639
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
640 641 642 643 644 645 646 647 648 649
	  break;

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

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

650 651 652 653 654 655
	case Bcall:
	case Bcall+1:
	case Bcall+2:
	case Bcall+3:
	case Bcall+4:
	case Bcall+5:
Jim Blandy's avatar
Jim Blandy committed
656 657
	  op -= Bcall;
	docall:
658
	  {
659
	    BEFORE_POTENTIAL_GC ();
660
	    DISCARD (op);
661
#ifdef BYTE_CODE_METER
662 663 664 665 666 667 668
	    if (byte_metering_on && SYMBOLP (TOP))
	      {
		Lisp_Object v1, v2;

		v1 = TOP;
		v2 = Fget (v1, Qbyte_code_meter);
		if (INTEGERP (v2)
669
		    && XINT (v2) < MOST_POSITIVE_FIXNUM)
670 671 672 673 674
		  {
		    XSETINT (v2, XINT (v2) + 1);
		    Fput (v1, Qbyte_code_meter, v2);
		  }
	      }
675
#endif
676 677 678 679
	    TOP = Ffuncall (op + 1, &TOP);
	    AFTER_POTENTIAL_GC ();
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
680 681 682 683 684 685 686 687 688

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

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

689 690 691 692 693 694
	case Bunbind:
	case Bunbind+1:
	case Bunbind+2:
	case Bunbind+3:
	case Bunbind+4:
	case Bunbind+5:
Jim Blandy's avatar
Jim Blandy committed
695 696
	  op -= Bunbind;
	dounbind:
Gerd Moellmann's avatar
Gerd Moellmann committed
697
	  BEFORE_POTENTIAL_GC ();
Juanma Barranquero's avatar
Juanma Barranquero committed
698
	  unbind_to (SPECPDL_INDEX () - op, Qnil);
Gerd Moellmann's avatar
Gerd Moellmann committed
699
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
700 701 702 703
	  break;

	case Bunbind_all:
	  /* To unbind back to the beginning of this frame.  Not used yet,
704
	     but will be needed for tail-recursion elimination.  */
Gerd Moellmann's avatar
Gerd Moellmann committed
705
	  BEFORE_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
706
	  unbind_to (count, Qnil);
Gerd Moellmann's avatar
Gerd Moellmann committed
707
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
708 709 710
	  break;

	case Bgoto:
Richard M. Stallman's avatar
Richard M. Stallman committed
711
	  MAYBE_GC ();
Gerd Moellmann's avatar
Gerd Moellmann committed
712
	  BYTE_CODE_QUIT;
Jim Blandy's avatar
Jim Blandy committed
713
	  op = FETCH2;    /* pc = FETCH2 loses since FETCH2 contains pc++ */
714
	  CHECK_RANGE (op);
Gerd Moellmann's avatar
Gerd Moellmann committed
715
	  stack.pc = stack.byte_string_start + op;
Jim Blandy's avatar
Jim Blandy committed
716 717 718
	  break;

	case Bgotoifnonnil:
719 720 721 722 723 724 725 726 727 728 729 730 731
	  {
	    Lisp_Object v1;
	    MAYBE_GC ();
	    op = FETCH2;
	    v1 = POP;
	    if (!NILP (v1))
	      {
		BYTE_CODE_QUIT;
		CHECK_RANGE (op);
		stack.pc = stack.byte_string_start + op;
	      }
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
732 733

	case Bgotoifnilelsepop:
Richard M. Stallman's avatar
Richard M. Stallman committed
734
	  MAYBE_GC ();
Jim Blandy's avatar
Jim Blandy committed
735
	  op = FETCH2;
Joseph Arceneaux's avatar
Joseph Arceneaux committed
736
	  if (NILP (TOP))
Jim Blandy's avatar
Jim Blandy committed
737
	    {
Gerd Moellmann's avatar
Gerd Moellmann committed
738
	      BYTE_CODE_QUIT;
739
	      CHECK_RANGE (op);
Gerd Moellmann's avatar
Gerd Moellmann committed
740
	      stack.pc = stack.byte_string_start + op;
Jim Blandy's avatar
Jim Blandy committed
741
	    }
742
	  else DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
743 744 745
	  break;

	case Bgotoifnonnilelsepop:
Richard M. Stallman's avatar
Richard M. Stallman committed
746
	  MAYBE_GC ();
Jim Blandy's avatar
Jim Blandy committed
747
	  op = FETCH2;
Joseph Arceneaux's avatar
Joseph Arceneaux committed
748
	  if (!NILP (TOP))
Jim Blandy's avatar
Jim Blandy committed
749
	    {
Gerd Moellmann's avatar
Gerd Moellmann committed
750
	      BYTE_CODE_QUIT;
751
	      CHECK_RANGE (op);
Gerd Moellmann's avatar
Gerd Moellmann committed
752
	      stack.pc = stack.byte_string_start + op;
Jim Blandy's avatar
Jim Blandy committed
753
	    }
754 755 756 757
	  else DISCARD (1);
	  break;

	case BRgoto:
Richard M. Stallman's avatar
Richard M. Stallman committed
758
	  MAYBE_GC ();
Gerd Moellmann's avatar
Gerd Moellmann committed
759
	  BYTE_CODE_QUIT;
Gerd Moellmann's avatar
Gerd Moellmann committed
760
	  stack.pc += (int) *stack.pc - 127;
761 762 763
	  break;

	case BRgotoifnil:
764 765 766 767 768 769 770 771 772 773 774 775
	  {
	    Lisp_Object v1;
	    MAYBE_GC ();
	    v1 = POP;
	    if (NILP (v1))
	      {
		BYTE_CODE_QUIT;
		stack.pc += (int) *stack.pc - 128;
	      }
	    stack.pc++;
	    break;
	  }
776 777

	case BRgotoifnonnil:
778 779 780 781 782 783 784 785 786 787 788 789
	  {
	    Lisp_Object v1;
	    MAYBE_GC ();
	    v1 = POP;
	    if (!NILP (v1))
	      {
		BYTE_CODE_QUIT;
		stack.pc += (int) *stack.pc - 128;
	      }
	    stack.pc++;
	    break;
	  }
790 791

	case BRgotoifnilelsepop:
Richard M. Stallman's avatar
Richard M. Stallman committed
792
	  MAYBE_GC ();
Gerd Moellmann's avatar
Gerd Moellmann committed
793
	  op = *stack.pc++;
794 795
	  if (NILP (TOP))
	    {
Gerd Moellmann's avatar
Gerd Moellmann committed
796
	      BYTE_CODE_QUIT;
Gerd Moellmann's avatar
Gerd Moellmann committed
797
	      stack.pc += op - 128;
798 799 800 801 802
	    }
	  else DISCARD (1);
	  break;

	case BRgotoifnonnilelsepop:
Richard M. Stallman's avatar
Richard M. Stallman committed
803
	  MAYBE_GC ();
Gerd Moellmann's avatar
Gerd Moellmann committed
804
	  op = *stack.pc++;
805 806
	  if (!NILP (TOP))
	    {
Gerd Moellmann's avatar
Gerd Moellmann committed
807
	      BYTE_CODE_QUIT;
Gerd Moellmann's avatar
Gerd Moellmann committed
808
	      stack.pc += op - 128;
809 810
	    }
	  else DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
811 812
	  break;

Jim Blandy's avatar
Jim Blandy committed
813
	case Breturn:
814
	  result = POP;
Jim Blandy's avatar
Jim Blandy committed
815 816 817
	  goto exit;

	case Bdiscard:
818
	  DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
819 820 821 822 823 824 825
	  break;

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

	case Bsave_excursion:
826 827
	  record_unwind_protect (save_excursion_restore,
				 save_excursion_save ());
Jim Blandy's avatar
Jim Blandy committed
828 829
	  break;

830
	case Bsave_current_buffer:
Richard M. Stallman's avatar
Richard M. Stallman committed
831
	case Bsave_current_buffer_1:
832
	  record_unwind_protect (set_buffer_if_live, Fcurrent_buffer ());
833 834
	  break;

Jim Blandy's avatar
Jim Blandy committed
835
	case Bsave_window_excursion:
836
	  BEFORE_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
837
	  TOP = Fsave_window_excursion (TOP);
838
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
839 840 841
	  break;

	case Bsave_restriction:
842 843
	  record_unwind_protect (save_restriction_restore,
				 save_restriction_save ());
Jim Blandy's avatar
Jim Blandy committed
844 845 846
	  break;

	case Bcatch:
847 848 849
	  {
	    Lisp_Object v1;
	    BEFORE_POTENTIAL_GC ();
850
	    v1 = POP;
851 852 853 854
	    TOP = internal_catch (TOP, Feval, v1);
	    AFTER_POTENTIAL_GC ();
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
855 856

	case Bunwind_protect:
857
	  record_unwind_protect (Fprogn, POP);
Jim Blandy's avatar
Jim Blandy committed
858 859 860
	  break;

	case Bcondition_case:
861
	  {
862 863 864
	    Lisp_Object handlers, body;
	    handlers = POP;
	    body = POP;
865
	    BEFORE_POTENTIAL_GC ();
866
	    TOP = internal_lisp_condition_case (TOP, body, handlers);
867 868 869
	    AFTER_POTENTIAL_GC ();
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
870 871

	case Btemp_output_buffer_setup:
872
	  BEFORE_POTENTIAL_GC ();
873
	  CHECK_STRING (TOP);
874
	  temp_output_buffer_setup (SDATA (TOP));
875
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
876 877 878 879
	  TOP = Vstandard_output;
	  break;

	case Btemp_output_buffer_show:
880 881 882
	  {
	    Lisp_Object v1;
	    BEFORE_POTENTIAL_GC ();
883
	    v1 = POP;
884 885 886
	    temp_output_buffer_show (TOP);
	    TOP = v1;
	    /* pop binding of standard-output */
Juanma Barranquero's avatar
Juanma Barranquero committed
887
	    unbind_to (SPECPDL_INDEX () - 1, Qnil);
888 889 890
	    AFTER_POTENTIAL_GC ();
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
891 892

	case Bnth:
893 894
	  {
	    Lisp_Object v1, v2;
895
	    BEFORE_POTENTIAL_GC ();
896 897
	    v1 = POP;
	    v2 = TOP;
898
	    CHECK_NUMBER (v2);
899
	    AFTER_POTENTIAL_GC ();
900 901
	    op = XINT (v2);
	    immediate_quit = 1;
902 903
	    while (--op >= 0 && CONSP (v1))
	      v1 = XCDR (v1);
904
	    immediate_quit = 0;
905
	    TOP = CAR (v1);
906 907
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
908 909

	case Bsymbolp:
910
	  TOP = SYMBOLP (TOP) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
911 912 913 914 915 916 917
	  break;

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

	case Bstringp:
918
	  TOP = STRINGP (TOP) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
919 920 921
	  break;

	case Blistp:
Joseph Arceneaux's avatar
Joseph Arceneaux committed
922
	  TOP = CONSP (TOP) || NILP (TOP) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
923 924 925
	  break;

	case Bnot:
Joseph Arceneaux's avatar
Joseph Arceneaux committed
926
	  TOP = NILP (TOP) ? Qt : Qnil;
Jim Blandy's avatar
Jim Blandy committed
927 928 929
	  break;

	case Bcons:
930 931 932 933 934 935
	  {
	    Lisp_Object v1;
	    v1 = POP;
	    TOP = Fcons (TOP, v1);
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
936 937 938 939 940 941

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

	case Blist2:
942 943 944 945 946 947
	  {
	    Lisp_Object v1;
	    v1 = POP;
	    TOP = Fcons (TOP, Fcons (v1, Qnil));
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
948 949

	case Blist3:
950
	  DISCARD (2);
Jim Blandy's avatar
Jim Blandy committed
951 952 953 954
	  TOP = Flist (3, &TOP);
	  break;

	case Blist4:
955
	  DISCARD (3);
Jim Blandy's avatar
Jim Blandy committed
956 957 958
	  TOP = Flist (4, &TOP);
	  break;

959 960 961 962 963 964
	case BlistN:
	  op = FETCH;
	  DISCARD (op - 1);
	  TOP = Flist (op, &TOP);
	  break;

Jim Blandy's avatar
Jim Blandy committed
965
	case Blength:
966
	  BEFORE_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
967
	  TOP = Flength (TOP);
968
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
969 970 971
	  break;

	case Baref:
972 973
	  {
	    Lisp_Object v1;
974
	    BEFORE_POTENTIAL_GC ();
975 976
	    v1 = POP;
	    TOP = Faref (TOP, v1);
977
	    AFTER_POTENTIAL_GC ();
978 979
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
980 981

	case Baset:
982 983
	  {
	    Lisp_Object v1, v2;
984
	    BEFORE_POTENTIAL_GC ();
985 986
	    v2 = POP; v1 = POP;
	    TOP = Faset (TOP, v1, v2);
987
	    AFTER_POTENTIAL_GC ();
988 989
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
990 991

	case Bsymbol_value:
992
	  BEFORE_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
993
	  TOP = Fsymbol_value (TOP);
994
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
995 996 997
	  break;

	case Bsymbol_function:
998
	  BEFORE_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
999
	  TOP = Fsymbol_function (TOP);
1000
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
1001 1002 1003
	  break;

	case Bset:
1004 1005
	  {
	    Lisp_Object v1;
1006
	    BEFORE_POTENTIAL_GC ();
1007 1008
	    v1 = POP;
	    TOP = Fset (TOP, v1);
1009
	    AFTER_POTENTIAL_GC ();
1010 1011
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
1012 1013

	case Bfset:
1014 1015
	  {
	    Lisp_Object v1;
1016
	    BEFORE_POTENTIAL_GC ();
1017 1018
	    v1 = POP;
	    TOP = Ffset (TOP, v1);
1019
	    AFTER_POTENTIAL_GC ();
1020 1021
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
1022 1023

	case Bget:
1024 1025
	  {
	    Lisp_Object v1;
1026
	    BEFORE_POTENTIAL_GC ();
1027 1028
	    v1 = POP;
	    TOP = Fget (TOP, v1);
1029
	    AFTER_POTENTIAL_GC ();
1030 1031
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
1032 1033

	case Bsubstring:
1034 1035
	  {
	    Lisp_Object v1, v2;
1036
	    BEFORE_POTENTIAL_GC ();
1037
	    v2 = POP; v1 = POP;
1038
	    TOP = Fsubstring (TOP, v1, v2);
1039
	    AFTER_POTENTIAL_GC ();
1040 1041
	    break;
	  }
Jim Blandy's avatar
Jim Blandy committed
1042 1043

	case Bconcat2:
1044
	  BEFORE_POTENTIAL_GC ();
1045
	  DISCARD (1);
Jim Blandy's avatar
Jim Blandy committed
1046
	  TOP = Fconcat (2, &TOP);
1047
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
1048 1049 1050
	  break;

	case Bconcat3:
1051
	  BEFORE_POTENTIAL_GC ();
1052
	  DISCARD (2);
Jim Blandy's avatar
Jim Blandy committed
1053
	  TOP = Fconcat (3, &TOP);
1054
	  AFTER_POTENTIAL_GC ();
Jim Blandy's avatar
Jim Blandy committed
1055 1056 1057
	  break;

	case Bconcat4:
1058
	  BEFORE_POTENTIAL_GC ();
1059
	  DISCARD (3);
Jim Blandy's avatar
Jim Blandy committed
1060
	  TOP = Fconcat (4,