File:  [gforth] / gforth / engine / engine.c
Revision 1.47: download - view: text, annotated - select for diffs
Sun Dec 15 17:38:52 2002 UTC (17 years, 10 months ago) by anton
Branches: MAIN
CVS tags: HEAD
fround is a primitive again
rint replacement function written

    1: /* Gforth virtual machine (aka inner interpreter)
    2: 
    3:   Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc.
    4: 
    5:   This file is part of Gforth.
    6: 
    7:   Gforth is free software; you can redistribute it and/or
    8:   modify it under the terms of the GNU General Public License
    9:   as published by the Free Software Foundation; either version 2
   10:   of the License, or (at your option) any later version.
   11: 
   12:   This program is distributed in the hope that it will be useful,
   13:   but WITHOUT ANY WARRANTY; without even the implied warranty of
   14:   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   15:   GNU General Public License for more details.
   16: 
   17:   You should have received a copy of the GNU General Public License
   18:   along with this program; if not, write to the Free Software
   19:   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
   20: */
   21: 
   22: undefine(`symbols')
   23: 
   24: #include "config.h"
   25: #include "forth.h"
   26: #include <ctype.h>
   27: #include <stdio.h>
   28: #include <string.h>
   29: #include <math.h>
   30: #include <assert.h>
   31: #include <stdlib.h>
   32: #include <errno.h>
   33: #include "io.h"
   34: #include "threaded.h"
   35: #ifndef STANDALONE
   36: #include <sys/types.h>
   37: #include <sys/stat.h>
   38: #include <fcntl.h>
   39: #include <time.h>
   40: #include <sys/time.h>
   41: #include <unistd.h>
   42: #include <pwd.h>
   43: #include <dirent.h>
   44: #include <sys/resource.h>
   45: #ifdef HAVE_FNMATCH_H
   46: #include <fnmatch.h>
   47: #else
   48: #include "fnmatch.h"
   49: #endif
   50: #else
   51: #include "systypes.h"
   52: #endif
   53: 
   54: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
   55: #include <dlfcn.h>
   56: #endif
   57: #if defined(_WIN32)
   58: #include <windows.h>
   59: #endif
   60: #ifdef hpux
   61: #include <dl.h>
   62: #endif
   63: 
   64: #ifndef SEEK_SET
   65: /* should be defined in stdio.h, but some systems don't have it */
   66: #define SEEK_SET 0
   67: #endif
   68: 
   69: #define IOR(flag)	((flag)? -512-errno : 0)
   70: 
   71: struct F83Name {
   72:   struct F83Name *next;  /* the link field for old hands */
   73:   char		countetc;
   74:   char		name[0];
   75: };
   76: 
   77: #define F83NAME_COUNT(np)	((np)->countetc & 0x1f)
   78: 
   79: struct Longname {
   80:   struct Longname *next;  /* the link field for old hands */
   81:   Cell		countetc;
   82:   char		name[0];
   83: };
   84: 
   85: #define LONGNAME_COUNT(np)	((np)->countetc & (((~((UCell)0))<<3)>>3))
   86: 
   87: Cell *SP;
   88: Float *FP;
   89: Address UP=NULL;
   90: 
   91: #if 0
   92: /* not used currently */
   93: int emitcounter;
   94: #endif
   95: #define NULLC '\0'
   96: 
   97: #ifdef MEMCMP_AS_SUBROUTINE
   98: extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
   99: #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
  100: #endif
  101: 
  102: #ifdef HAS_FILE
  103: char *cstr(Char *from, UCell size, int clear)
  104: /* return a C-string corresponding to the Forth string ( FROM SIZE ).
  105:    the C-string lives until the next call of cstr with CLEAR being true */
  106: {
  107:   static struct cstr_buffer {
  108:     char *buffer;
  109:     size_t size;
  110:   } *buffers=NULL;
  111:   static int nbuffers=0;
  112:   static int used=0;
  113:   struct cstr_buffer *b;
  114: 
  115:   if (buffers==NULL)
  116:     buffers=malloc(0);
  117:   if (clear)
  118:     used=0;
  119:   if (used>=nbuffers) {
  120:     buffers=realloc(buffers,sizeof(struct cstr_buffer)*(used+1));
  121:     buffers[used]=(struct cstr_buffer){malloc(0),0};
  122:     nbuffers=used+1;
  123:   }
  124:   b=&buffers[used];
  125:   if (size+1 > b->size) {
  126:     b->buffer = realloc(b->buffer,size+1);
  127:     b->size = size+1;
  128:   }
  129:   memcpy(b->buffer,from,size);
  130:   b->buffer[size]='\0';
  131:   used++;
  132:   return b->buffer;
  133: }
  134: 
  135: char *tilde_cstr(Char *from, UCell size, int clear)
  136: /* like cstr(), but perform tilde expansion on the string */
  137: {
  138:   char *s1,*s2;
  139:   int s1_len, s2_len;
  140:   struct passwd *getpwnam (), *user_entry;
  141: 
  142:   if (size<1 || from[0]!='~')
  143:     return cstr(from, size, clear);
  144:   if (size<2 || from[1]=='/') {
  145:     s1 = (char *)getenv ("HOME");
  146:     if(s1 == NULL)
  147:       s1 = "";
  148:     s2 = from+1;
  149:     s2_len = size-1;
  150:   } else {
  151:     UCell i;
  152:     for (i=1; i<size && from[i]!='/'; i++)
  153:       ;
  154:     if (i==2 && from[1]=='+') /* deal with "~+", i.e., the wd */
  155:       return cstr(from+3, size<3?0:size-3,clear);
  156:     {
  157:       char user[i];
  158:       memcpy(user,from+1,i-1);
  159:       user[i-1]='\0';
  160:       user_entry=getpwnam(user);
  161:     }
  162:     if (user_entry==NULL)
  163:       return cstr(from, size, clear);
  164:     s1 = user_entry->pw_dir;
  165:     s2 = from+i;
  166:     s2_len = size-i;
  167:   }
  168:   s1_len = strlen(s1);
  169:   if (s1_len>1 && s1[s1_len-1]=='/')
  170:     s1_len--;
  171:   {
  172:     char path[s1_len+s2_len];
  173:     memcpy(path,s1,s1_len);
  174:     memcpy(path+s1_len,s2,s2_len);
  175:     return cstr(path,s1_len+s2_len,clear);
  176:   }
  177: }
  178: #endif
  179: 
  180: DCell timeval2us(struct timeval *tvp)
  181: {
  182: #ifndef BUGGY_LONG_LONG
  183:   return (tvp->tv_sec*(DCell)1000000)+tvp->tv_usec;
  184: #else
  185:   DCell d2;
  186:   DCell d1=mmul(tvp->tv_sec,1000000);
  187:   d2.lo = d1.lo+tvp->tv_usec;
  188:   d2.hi = d1.hi + (d2.lo<d1.lo);
  189:   return d2;
  190: #endif
  191: }
  192: 
  193: #define NEWLINE	'\n'
  194: 
  195: #ifdef HAS_FILE
  196: static char* fileattr[6]={"rb","rb","r+b","r+b","wb","wb"};
  197: static char* pfileattr[6]={"r","r","r+","r+","w","w"};
  198: 
  199: #ifndef O_BINARY
  200: #define O_BINARY 0
  201: #endif
  202: #ifndef O_TEXT
  203: #define O_TEXT 0
  204: #endif
  205: 
  206: static int ufileattr[6]= {
  207:   O_RDONLY|O_BINARY, O_RDONLY|O_BINARY,
  208:   O_RDWR  |O_BINARY, O_RDWR  |O_BINARY,
  209:   O_WRONLY|O_BINARY, O_WRONLY|O_BINARY };
  210: #endif
  211: 
  212: /* conversion on fetch */
  213: 
  214: #define vm_Cell2f(_cell,_x)		((_x)=(Bool)(_cell))
  215: #define vm_Cell2c(_cell,_x)		((_x)=(Char)(_cell))
  216: #define vm_Cell2n(_cell,_x)		((_x)=(Cell)(_cell))
  217: #define vm_Cell2w(_cell,_x)		((_x)=(Cell)(_cell))
  218: #define vm_Cell2u(_cell,_x)		((_x)=(UCell)(_cell))
  219: #define vm_Cell2a_(_cell,_x)		((_x)=(Cell *)(_cell))
  220: #define vm_Cell2c_(_cell,_x)		((_x)=(Char *)(_cell))
  221: #define vm_Cell2f_(_cell,_x)		((_x)=(Float *)(_cell))
  222: #define vm_Cell2df_(_cell,_x)		((_x)=(DFloat *)(_cell))
  223: #define vm_Cell2sf_(_cell,_x)		((_x)=(SFloat *)(_cell))
  224: #define vm_Cell2xt(_cell,_x)		((_x)=(Xt)(_cell))
  225: #define vm_Cell2f83name(_cell,_x)	((_x)=(struct F83Name *)(_cell))
  226: #define vm_Cell2longname(_cell,_x)	((_x)=(struct Longname *)(_cell))
  227: #define vm_Float2r(_float,_x)		(_x=_float)
  228: 
  229: /* conversion on store */
  230: 
  231: #define vm_f2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  232: #define vm_c2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  233: #define vm_n2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  234: #define vm_w2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  235: #define vm_u2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  236: #define vm_a_2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  237: #define vm_c_2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  238: #define vm_f_2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  239: #define vm_df_2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  240: #define vm_sf_2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  241: #define vm_xt2Cell(_x,_cell)		((_cell)=(Cell)(_x))
  242: #define vm_f83name2Cell(_x,_cell)	((_cell)=(Cell)(_x))
  243: #define vm_longname2Cell(_x,_cell)	((_cell)=(Cell)(_x))
  244: #define vm_r2Float(_x,_float)		(_float=_x)
  245: 
  246: #define vm_Cell2Cell(_x,_y)		(_y=_x)
  247: 
  248: #ifdef NO_IP
  249: #define IMM_ARG(access,value)		(VARIANT(value))
  250: #else
  251: #define IMM_ARG(access,value)		(access)
  252: #endif
  253: 
  254: /* if machine.h has not defined explicit registers, define them as implicit */
  255: #ifndef IPREG
  256: #define IPREG
  257: #endif
  258: #ifndef SPREG
  259: #define SPREG
  260: #endif
  261: #ifndef RPREG
  262: #define RPREG
  263: #endif
  264: #ifndef FPREG
  265: #define FPREG
  266: #endif
  267: #ifndef LPREG
  268: #define LPREG
  269: #endif
  270: #ifndef CFAREG
  271: #define CFAREG
  272: #endif
  273: #ifndef UPREG
  274: #define UPREG
  275: #endif
  276: #ifndef TOSREG
  277: #define TOSREG
  278: #endif
  279: #ifndef FTOSREG
  280: #define FTOSREG
  281: #endif
  282: 
  283: #ifndef CPU_DEP1
  284: # define CPU_DEP1 0
  285: #endif
  286: 
  287: /* instructions containing these must be the last instruction of a
  288:    super-instruction (e.g., branches, EXECUTE, and other instructions
  289:    ending the basic block). Instructions containing SET_IP get this
  290:    automatically, so you usually don't have to write it.  If you have
  291:    to write it, write it after IP points to the next instruction.
  292:    Used for profiling.  Don't write it in a word containing SET_IP, or
  293:    the following block will be counted twice. */
  294: #ifdef VM_PROFILING
  295: #define SUPER_END  vm_count_block(IP)
  296: #else
  297: #define SUPER_END
  298: #endif
  299: #define SUPER_CONTINUE
  300: 
  301: #ifdef GFORTH_DEBUGGING
  302: /* define some VM registers as global variables, so they survive exceptions;
  303:    global register variables are not up to the task (according to the 
  304:    GNU C manual) */
  305: Xt *saved_ip;
  306: Cell *rp;
  307: #endif
  308: 
  309: #ifdef NO_IP
  310: static Label next_code;
  311: #endif
  312: 
  313: #ifdef DEBUG
  314: #define CFA_TO_NAME(__cfa) \
  315:       Cell len, i; \
  316:       char * name = __cfa; \
  317:       for(i=0; i<32; i+=sizeof(Cell)) { \
  318:         len = ((Cell*)name)[-1]; \
  319:         if(len < 0) { \
  320: 	  len &= 0x1F; \
  321:           if((len+sizeof(Cell)) > i) break; \
  322: 	} len = 0; \
  323: 	name -= sizeof(Cell); \
  324:       }
  325: #endif
  326: 
  327: Xt *primtable(Label symbols[], Cell size)
  328:      /* used in primitive primtable for peephole optimization */
  329: {
  330:   Xt *xts = (Xt *)malloc(size*sizeof(Xt));
  331:   Cell i;
  332: 
  333:   for (i=0; i<size; i++)
  334:     xts[i] = &symbols[i];
  335:   return xts;
  336: }
  337: 
  338: define(enginerest,
  339: `(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
  340: /* executes code at ip, if ip!=NULL
  341:    returns array of machine code labels (for use in a loader), if ip==NULL
  342: */
  343: {
  344: #ifndef GFORTH_DEBUGGING
  345:   register Cell *rp RPREG;
  346: #endif
  347: #ifndef NO_IP
  348:   register Xt *ip IPREG = ip0;
  349: #endif
  350:   register Cell *sp SPREG = sp0;
  351:   register Float *fp FPREG = fp0;
  352:   register Address lp LPREG = lp0;
  353:   register Xt cfa CFAREG;
  354: #ifdef MORE_VARS
  355:   MORE_VARS
  356: #endif
  357:   register Address up UPREG = UP;
  358:   IF_spTOS(register Cell spTOS TOSREG;)
  359:   IF_fpTOS(register Float fpTOS FTOSREG;)
  360: #if defined(DOUBLY_INDIRECT)
  361:   static Label *symbols;
  362:   static void *routines[]= {
  363: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
  364: #else /* !defined(DOUBLY_INDIRECT) */
  365:   static Label symbols[]= {
  366: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
  367: #endif /* !defined(DOUBLY_INDIRECT) */
  368:     (Label)&&docol,
  369:     (Label)&&docon,
  370:     (Label)&&dovar,
  371:     (Label)&&douser,
  372:     (Label)&&dodefer,
  373:     (Label)&&dofield,
  374:     (Label)&&dodoes,
  375:     /* the following entry is normally unused;
  376:        it is there because its index indicates a does-handler */
  377:     CPU_DEP1,
  378: #define INST_ADDR(name) (Label)&&I_##name
  379: #include "prim_lab.i"
  380: #undef INST_ADDR
  381:     (Label)&&after_last,
  382:     (Label)0,
  383: #define INST_ADDR(name) (Label)&&K_##name
  384: #include "prim_lab.i"
  385: #undef INST_ADDR
  386: #ifdef IN_ENGINE2
  387: #define INST_ADDR(name) (Label)&&J_##name
  388: #include "prim_lab.i"
  389: #undef INST_ADDR
  390: #endif
  391:   };
  392: #ifdef CPU_DEP2
  393:   CPU_DEP2
  394: #endif
  395: 
  396:   rp = rp0;
  397: #ifdef DEBUG
  398:   fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
  399:           (unsigned)ip0,(unsigned)sp,(unsigned)rp,
  400: 	  (unsigned)fp,(unsigned)lp,(unsigned)up);
  401: #endif
  402: 
  403:   if (ip0 == NULL) {
  404: #if defined(DOUBLY_INDIRECT)
  405: #define CODE_OFFSET (26*sizeof(Cell))
  406: #define XT_OFFSET (22*sizeof(Cell))
  407:     int i;
  408:     Cell code_offset = offset_image? CODE_OFFSET : 0;
  409:     Cell xt_offset = offset_image? XT_OFFSET : 0;
  410: 
  411:     symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
  412:     xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
  413:     for (i=0; i<DOESJUMP+1; i++)
  414:       xts[i] = symbols[i] = (Label)routines[i];
  415:     for (; routines[i]!=0; i++) {
  416:       if (i>=MAX_SYMBOLS) {
  417: 	fprintf(stderr,"gforth-ditc: more than %d primitives\n",MAX_SYMBOLS);
  418: 	exit(1);
  419:       }
  420:       xts[i] = symbols[i] = &routines[i];
  421:     }
  422: #endif /* defined(DOUBLY_INDIRECT) */
  423:     return symbols;
  424:   }
  425: 
  426:   IF_spTOS(spTOS = sp[0]);
  427:   IF_fpTOS(fpTOS = fp[0]);
  428: /*  prep_terminal(); */
  429: #ifdef NO_IP
  430:   goto *(*(Label *)ip0);
  431: #else
  432:   SET_IP(ip);
  433:   SUPER_END; /* count the first block, too */
  434:   NEXT;
  435: #endif
  436: 
  437: #ifdef CPU_DEP3
  438:   CPU_DEP3
  439: #endif
  440:   
  441:  docol:
  442:   {
  443: #ifdef NO_IP
  444:     *--rp = next_code;
  445:     goto **(Label *)PFA1(cfa);
  446: #else
  447: #ifdef DEBUG
  448:     {
  449:       CFA_TO_NAME(cfa);
  450:       fprintf(stderr,"%08lx: col: %08lx %.*s\n",(Cell)ip,(Cell)PFA1(cfa),
  451: 	      len,name);
  452:     }
  453: #endif
  454: #ifdef CISC_NEXT
  455:     /* this is the simple version */
  456:     *--rp = (Cell)ip;
  457:     SET_IP((Xt *)PFA1(cfa));
  458:     SUPER_END;
  459:     NEXT;
  460: #else
  461:     /* this one is important, so we help the compiler optimizing */
  462:     {
  463:       DEF_CA
  464:       rp[-1] = (Cell)ip;
  465:       SET_IP((Xt *)PFA1(cfa));
  466:       SUPER_END;
  467:       NEXT_P1;
  468:       rp--;
  469:       NEXT_P2;
  470:     }
  471: #endif
  472: #endif
  473:   }
  474: 
  475:  docon:
  476:   {
  477: #ifdef DEBUG
  478:     fprintf(stderr,"%08lx: con: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
  479: #endif
  480: #ifdef USE_TOS
  481:     *sp-- = spTOS;
  482:     spTOS = *(Cell *)PFA1(cfa);
  483: #else
  484:     *--sp = *(Cell *)PFA1(cfa);
  485: #endif
  486:   }
  487: #ifdef NO_IP
  488:   goto *next_code;
  489: #else
  490:   NEXT_P0;
  491:   NEXT;
  492: #endif
  493:   
  494:  dovar:
  495:   {
  496: #ifdef DEBUG
  497:     fprintf(stderr,"%08lx: var: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
  498: #endif
  499: #ifdef USE_TOS
  500:     *sp-- = spTOS;
  501:     spTOS = (Cell)PFA1(cfa);
  502: #else
  503:     *--sp = (Cell)PFA1(cfa);
  504: #endif
  505:   }
  506: #ifdef NO_IP
  507:   goto *next_code;
  508: #else
  509:   NEXT_P0;
  510:   NEXT;
  511: #endif
  512:   
  513:  douser:
  514:   {
  515: #ifdef DEBUG
  516:     fprintf(stderr,"%08lx: user: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
  517: #endif
  518: #ifdef USE_TOS
  519:     *sp-- = spTOS;
  520:     spTOS = (Cell)(up+*(Cell*)PFA1(cfa));
  521: #else
  522:     *--sp = (Cell)(up+*(Cell*)PFA1(cfa));
  523: #endif
  524:   }
  525: #ifdef NO_IP
  526:   goto *next_code;
  527: #else
  528:   NEXT_P0;
  529:   NEXT;
  530: #endif
  531:   
  532:  dodefer:
  533:   {
  534: #ifdef DEBUG
  535:     fprintf(stderr,"%08lx: defer: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
  536: #endif
  537:     SUPER_END;
  538:     EXEC(*(Xt *)PFA1(cfa));
  539:   }
  540: 
  541:  dofield:
  542:   {
  543: #ifdef DEBUG
  544:     fprintf(stderr,"%08lx: field: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
  545: #endif
  546:     spTOS += *(Cell*)PFA1(cfa);
  547:   }
  548: #ifdef NO_IP
  549:   goto *next_code;
  550: #else
  551:   NEXT_P0;
  552:   NEXT;
  553: #endif
  554: 
  555:  dodoes:
  556:   /* this assumes the following structure:
  557:      defining-word:
  558:      
  559:      ...
  560:      DOES>
  561:      (possible padding)
  562:      possibly handler: jmp dodoes
  563:      (possible branch delay slot(s))
  564:      Forth code after DOES>
  565:      
  566:      defined word:
  567:      
  568:      cfa: address of or jump to handler OR
  569:           address of or jump to dodoes, address of DOES-code
  570:      pfa:
  571:      
  572:      */
  573: #ifdef NO_IP
  574:   *--rp = next_code;
  575:   IF_spTOS(spTOS = sp[0]);
  576:   sp--;
  577:   spTOS = (Cell)PFA(cfa);
  578:   goto **(Label *)DOES_CODE1(cfa);
  579: #else
  580:   {
  581:     /*    fprintf(stderr, "Got CFA %08lx at doescode %08lx/%08lx: does: %08lx\n",cfa,(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));*/
  582: #ifdef DEBUG
  583:     fprintf(stderr,"%08lx/%08lx: does: %08lx\n",(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));
  584:     fflush(stderr);
  585: #endif
  586:     *--rp = (Cell)ip;
  587:     /* PFA1 might collide with DOES_CODE1 here, so we use PFA */
  588: #ifdef USE_TOS
  589:     *sp-- = spTOS;
  590:     spTOS = (Cell)PFA(cfa);
  591: #else
  592:     *--sp = (Cell)PFA(cfa);
  593: #endif
  594:     SET_IP(DOES_CODE1(cfa));
  595:     SUPER_END;
  596:     /*    fprintf(stderr,"TOS = %08lx, IP=%08lx\n", spTOS, IP);*/
  597:   }
  598:   NEXT;
  599: #endif
  600: 
  601: #ifndef IN_ENGINE2
  602: #define LABEL(name) I_##name:
  603: #else
  604: #define LABEL(name) J_##name: asm(".skip 16"); I_##name:
  605: #endif
  606: #define LABEL2(name) K_##name:
  607: #include "prim.i"
  608: #undef LABEL
  609:   after_last: return (Label *)0;
  610:   /*needed only to get the length of the last primitive */
  611: }'
  612: )
  613: 
  614: #define VARIANT(v)	(v)
  615: #define JUMP(target)	goto I_noop
  616: 
  617: Label *engine enginerest
  618: 
  619: #ifndef NO_DYNAMIC
  620: 
  621: #ifdef NO_IP
  622: #undef VARIANT
  623: #define VARIANT(v)	((v)^0xffffffff)
  624: #undef JUMP
  625: #define JUMP(target)	goto K_lit
  626: Label *engine3 enginerest
  627: #endif
  628: 
  629: #undef VARIANT
  630: #define VARIANT(v)	(v)
  631: #undef JUMP
  632: #define JUMP(target)	goto I_noop
  633: #define IN_ENGINE2
  634: Label *engine2 enginerest
  635: #endif

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