Annotation of gforth/engine/engine.c, revision 1.47

1.1       anton       1: /* Gforth virtual machine (aka inner interpreter)
                      2: 
1.22      anton       3:   Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc.
1.1       anton       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
1.23      anton      19:   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.1       anton      20: */
                     21: 
1.36      pazsan     22: undefine(`symbols')
                     23: 
1.1       anton      24: #include "config.h"
1.31      pazsan     25: #include "forth.h"
1.1       anton      26: #include <ctype.h>
                     27: #include <stdio.h>
                     28: #include <string.h>
                     29: #include <math.h>
1.4       pazsan     30: #include <assert.h>
                     31: #include <stdlib.h>
                     32: #include <errno.h>
                     33: #include "io.h"
                     34: #include "threaded.h"
                     35: #ifndef STANDALONE
1.1       anton      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>
1.17      pazsan     43: #include <dirent.h>
1.21      anton      44: #include <sys/resource.h>
1.19      anton      45: #ifdef HAVE_FNMATCH_H
1.18      anton      46: #include <fnmatch.h>
1.19      anton      47: #else
                     48: #include "fnmatch.h"
                     49: #endif
1.4       pazsan     50: #else
                     51: #include "systypes.h"
                     52: #endif
1.1       anton      53: 
                     54: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
                     55: #include <dlfcn.h>
                     56: #endif
1.8       pazsan     57: #if defined(_WIN32)
                     58: #include <windows.h>
                     59: #endif
1.1       anton      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: 
1.4       pazsan     71: struct F83Name {
                     72:   struct F83Name *next;  /* the link field for old hands */
                     73:   char         countetc;
                     74:   char         name[0];
                     75: };
1.1       anton      76: 
                     77: #define F83NAME_COUNT(np)      ((np)->countetc & 0x1f)
1.25      anton      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))
1.1       anton      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: 
1.14      pazsan     97: #ifdef MEMCMP_AS_SUBROUTINE
                     98: extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
1.15      anton      99: #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
1.14      pazsan    100: #endif
                    101: 
1.9       pazsan    102: #ifdef HAS_FILE
1.1       anton     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:       ;
1.13      anton     154:     if (i==2 && from[1]=='+') /* deal with "~+", i.e., the wd */
                    155:       return cstr(from+3, size<3?0:size-3,clear);
1.1       anton     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: }
1.9       pazsan    178: #endif
1.21      anton     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: }
1.1       anton     192: 
                    193: #define NEWLINE        '\n'
                    194: 
1.9       pazsan    195: #ifdef HAS_FILE
1.16      anton     196: static char* fileattr[6]={"rb","rb","r+b","r+b","wb","wb"};
1.32      pazsan    197: static char* pfileattr[6]={"r","r","r+","r+","w","w"};
1.1       anton     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]= {
1.16      anton     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 };
1.9       pazsan    210: #endif
1.1       anton     211: 
1.26      anton     212: /* conversion on fetch */
                    213: 
1.41      anton     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)
1.26      anton     228: 
                    229: /* conversion on store */
                    230: 
1.41      anton     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)
1.26      anton     245: 
1.41      anton     246: #define vm_Cell2Cell(_x,_y)            (_y=_x)
1.29      anton     247: 
1.46      anton     248: #ifdef NO_IP
                    249: #define IMM_ARG(access,value)          (VARIANT(value))
                    250: #else
                    251: #define IMM_ARG(access,value)          (access)
                    252: #endif
                    253: 
1.1       anton     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: 
1.28      anton     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
1.35      anton     299: #define SUPER_CONTINUE
1.28      anton     300: 
1.10      anton     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) */
1.44      anton     305: Xt *saved_ip;
1.10      anton     306: Cell *rp;
                    307: #endif
                    308: 
1.46      anton     309: #ifdef NO_IP
                    310: static Label next_code;
                    311: #endif
                    312: 
1.37      pazsan    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: 
1.30      anton     327: Xt *primtable(Label symbols[], Cell size)
1.39      anton     328:      /* used in primitive primtable for peephole optimization */
1.30      anton     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: 
1.34      anton     338: define(enginerest,
                    339: `(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
1.1       anton     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: {
1.10      anton     344: #ifndef GFORTH_DEBUGGING
                    345:   register Cell *rp RPREG;
                    346: #endif
1.46      anton     347: #ifndef NO_IP
                    348:   register Xt *ip IPREG = ip0;
                    349: #endif
1.1       anton     350:   register Cell *sp SPREG = sp0;
                    351:   register Float *fp FPREG = fp0;
                    352:   register Address lp LPREG = lp0;
                    353:   register Xt cfa CFAREG;
1.11      anton     354: #ifdef MORE_VARS
                    355:   MORE_VARS
                    356: #endif
1.1       anton     357:   register Address up UPREG = UP;
1.24      anton     358:   IF_spTOS(register Cell spTOS TOSREG;)
                    359:   IF_fpTOS(register Float fpTOS FTOSREG;)
1.1       anton     360: #if defined(DOUBLY_INDIRECT)
                    361:   static Label *symbols;
                    362:   static void *routines[]= {
1.27      anton     363: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
1.1       anton     364: #else /* !defined(DOUBLY_INDIRECT) */
                    365:   static Label symbols[]= {
1.27      anton     366: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
1.1       anton     367: #endif /* !defined(DOUBLY_INDIRECT) */
1.4       pazsan    368:     (Label)&&docol,
                    369:     (Label)&&docon,
                    370:     (Label)&&dovar,
                    371:     (Label)&&douser,
                    372:     (Label)&&dodefer,
                    373:     (Label)&&dofield,
                    374:     (Label)&&dodoes,
1.1       anton     375:     /* the following entry is normally unused;
1.34      anton     376:        it is there because its index indicates a does-handler */
1.7       pazsan    377:     CPU_DEP1,
1.34      anton     378: #define INST_ADDR(name) (Label)&&I_##name
                    379: #include "prim_lab.i"
                    380: #undef INST_ADDR
                    381:     (Label)&&after_last,
                    382:     (Label)0,
1.46      anton     383: #define INST_ADDR(name) (Label)&&K_##name
                    384: #include "prim_lab.i"
                    385: #undef INST_ADDR
1.34      anton     386: #ifdef IN_ENGINE2
                    387: #define INST_ADDR(name) (Label)&&J_##name
1.1       anton     388: #include "prim_lab.i"
1.34      anton     389: #undef INST_ADDR
                    390: #endif
1.1       anton     391:   };
                    392: #ifdef CPU_DEP2
                    393:   CPU_DEP2
                    394: #endif
                    395: 
1.10      anton     396:   rp = rp0;
1.1       anton     397: #ifdef DEBUG
                    398:   fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
1.46      anton     399:           (unsigned)ip0,(unsigned)sp,(unsigned)rp,
1.1       anton     400:          (unsigned)fp,(unsigned)lp,(unsigned)up);
                    401: #endif
                    402: 
1.46      anton     403:   if (ip0 == NULL) {
1.1       anton     404: #if defined(DOUBLY_INDIRECT)
1.38      anton     405: #define CODE_OFFSET (26*sizeof(Cell))
                    406: #define XT_OFFSET (22*sizeof(Cell))
1.1       anton     407:     int i;
1.3       anton     408:     Cell code_offset = offset_image? CODE_OFFSET : 0;
1.38      anton     409:     Cell xt_offset = offset_image? XT_OFFSET : 0;
1.7       pazsan    410: 
1.3       anton     411:     symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
1.38      anton     412:     xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
1.1       anton     413:     for (i=0; i<DOESJUMP+1; i++)
1.38      anton     414:       xts[i] = symbols[i] = (Label)routines[i];
1.1       anton     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);
1.20      anton     419:       }
1.38      anton     420:       xts[i] = symbols[i] = &routines[i];
1.1       anton     421:     }
1.20      anton     422: #endif /* defined(DOUBLY_INDIRECT) */
                    423:     return symbols;
1.7       pazsan    424:   }
1.1       anton     425: 
1.24      anton     426:   IF_spTOS(spTOS = sp[0]);
                    427:   IF_fpTOS(fpTOS = fp[0]);
1.7       pazsan    428: /*  prep_terminal(); */
1.46      anton     429: #ifdef NO_IP
                    430:   goto *(*(Label *)ip0);
                    431: #else
1.11      anton     432:   SET_IP(ip);
1.28      anton     433:   SUPER_END; /* count the first block, too */
1.1       anton     434:   NEXT;
1.46      anton     435: #endif
1.11      anton     436: 
1.1       anton     437: #ifdef CPU_DEP3
                    438:   CPU_DEP3
                    439: #endif
                    440:   
                    441:  docol:
                    442:   {
1.46      anton     443: #ifdef NO_IP
                    444:     *--rp = next_code;
                    445:     goto **(Label *)PFA1(cfa);
                    446: #else
1.1       anton     447: #ifdef DEBUG
1.37      pazsan    448:     {
                    449:       CFA_TO_NAME(cfa);
                    450:       fprintf(stderr,"%08lx: col: %08lx %.*s\n",(Cell)ip,(Cell)PFA1(cfa),
                    451:              len,name);
                    452:     }
1.1       anton     453: #endif
                    454: #ifdef CISC_NEXT
                    455:     /* this is the simple version */
                    456:     *--rp = (Cell)ip;
1.11      anton     457:     SET_IP((Xt *)PFA1(cfa));
1.28      anton     458:     SUPER_END;
1.1       anton     459:     NEXT;
                    460: #else
1.11      anton     461:     /* this one is important, so we help the compiler optimizing */
1.1       anton     462:     {
                    463:       DEF_CA
1.11      anton     464:       rp[-1] = (Cell)ip;
                    465:       SET_IP((Xt *)PFA1(cfa));
1.28      anton     466:       SUPER_END;
1.11      anton     467:       NEXT_P1;
                    468:       rp--;
                    469:       NEXT_P2;
1.1       anton     470:     }
                    471: #endif
1.46      anton     472: #endif
1.1       anton     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
1.24      anton     481:     *sp-- = spTOS;
                    482:     spTOS = *(Cell *)PFA1(cfa);
1.1       anton     483: #else
                    484:     *--sp = *(Cell *)PFA1(cfa);
                    485: #endif
                    486:   }
1.46      anton     487: #ifdef NO_IP
                    488:   goto *next_code;
                    489: #else
1.1       anton     490:   NEXT_P0;
                    491:   NEXT;
1.46      anton     492: #endif
1.1       anton     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
1.24      anton     500:     *sp-- = spTOS;
                    501:     spTOS = (Cell)PFA1(cfa);
1.1       anton     502: #else
                    503:     *--sp = (Cell)PFA1(cfa);
                    504: #endif
                    505:   }
1.46      anton     506: #ifdef NO_IP
                    507:   goto *next_code;
                    508: #else
1.1       anton     509:   NEXT_P0;
                    510:   NEXT;
1.46      anton     511: #endif
1.1       anton     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
1.24      anton     519:     *sp-- = spTOS;
                    520:     spTOS = (Cell)(up+*(Cell*)PFA1(cfa));
1.1       anton     521: #else
                    522:     *--sp = (Cell)(up+*(Cell*)PFA1(cfa));
                    523: #endif
                    524:   }
1.46      anton     525: #ifdef NO_IP
                    526:   goto *next_code;
                    527: #else
1.1       anton     528:   NEXT_P0;
                    529:   NEXT;
1.46      anton     530: #endif
1.1       anton     531:   
                    532:  dodefer:
                    533:   {
                    534: #ifdef DEBUG
                    535:     fprintf(stderr,"%08lx: defer: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
                    536: #endif
1.28      anton     537:     SUPER_END;
1.1       anton     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
1.24      anton     546:     spTOS += *(Cell*)PFA1(cfa);
1.1       anton     547:   }
1.46      anton     548: #ifdef NO_IP
                    549:   goto *next_code;
                    550: #else
1.1       anton     551:   NEXT_P0;
                    552:   NEXT;
1.46      anton     553: #endif
1.1       anton     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:      */
1.46      anton     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
1.1       anton     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
1.24      anton     589:     *sp-- = spTOS;
                    590:     spTOS = (Cell)PFA(cfa);
1.1       anton     591: #else
                    592:     *--sp = (Cell)PFA(cfa);
                    593: #endif
1.11      anton     594:     SET_IP(DOES_CODE1(cfa));
1.28      anton     595:     SUPER_END;
1.24      anton     596:     /*    fprintf(stderr,"TOS = %08lx, IP=%08lx\n", spTOS, IP);*/
1.1       anton     597:   }
                    598:   NEXT;
1.46      anton     599: #endif
1.1       anton     600: 
1.34      anton     601: #ifndef IN_ENGINE2
1.43      anton     602: #define LABEL(name) I_##name:
1.34      anton     603: #else
1.43      anton     604: #define LABEL(name) J_##name: asm(".skip 16"); I_##name:
1.34      anton     605: #endif
1.46      anton     606: #define LABEL2(name) K_##name:
1.1       anton     607: #include "prim.i"
1.34      anton     608: #undef LABEL
                    609:   after_last: return (Label *)0;
                    610:   /*needed only to get the length of the last primitive */
                    611: }'
                    612: )
                    613: 
1.46      anton     614: #define VARIANT(v)     (v)
                    615: #define JUMP(target)   goto I_noop
                    616: 
1.34      anton     617: Label *engine enginerest
                    618: 
1.45      anton     619: #ifndef NO_DYNAMIC
1.46      anton     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
1.34      anton     633: #define IN_ENGINE2
                    634: Label *engine2 enginerest
1.45      anton     635: #endif

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