Diff for /gforth/Attic/engine.c between versions 1.30 and 1.41

version 1.30, 1995/10/26 22:48:39 version 1.41, 1997/03/04 17:49:48
Line 1 Line 1
 /*  /* Gforth virtual machine (aka inner interpreter)
   Copyright 1992 by the ANSI figForth Development Group  
     Copyright (C) 1995 Free Software Foundation, Inc.
   
     This file is part of Gforth.
   
     Gforth is free software; you can redistribute it and/or
     modify it under the terms of the GNU General Public License
     as published by the Free Software Foundation; either version 2
     of the License, or (at your option) any later version.
   
     This program 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 this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */  */
   
   #include "config.h"
 #include <ctype.h>  #include <ctype.h>
 #include <stdio.h>  #include <stdio.h>
 #include <string.h>  #include <string.h>
Line 27 Line 45
   
 #define IOR(flag)       ((flag)? -512-errno : 0)  #define IOR(flag)       ((flag)? -512-errno : 0)
   
 typedef union {  
   struct {  
 #ifdef WORDS_BIGENDIAN  
     Cell high;  
     Cell low;  
 #else  
     Cell low;  
     Cell high;  
 #endif;  
   } cells;  
   DCell dcell;  
 } Double_Store;  
   
 typedef struct F83Name {  typedef struct F83Name {
   struct F83Name        *next;  /* the link field for old hands */    struct F83Name        *next;  /* the link field for old hands */
   char                  countetc;    char                  countetc;
Line 51  typedef struct F83Name { Line 56  typedef struct F83Name {
 #define F83NAME_SMUDGE(np)      (((np)->countetc & 0x40) != 0)  #define F83NAME_SMUDGE(np)      (((np)->countetc & 0x40) != 0)
 #define F83NAME_IMMEDIATE(np)   (((np)->countetc & 0x20) != 0)  #define F83NAME_IMMEDIATE(np)   (((np)->countetc & 0x20) != 0)
   
 #ifdef USE_TOS  
 #define IF_TOS(x) x  
 #else  
 #define IF_TOS(x)  
 #define TOS (sp[0])  
 #endif  
   
 #ifdef USE_FTOS  
 #define IF_FTOS(x) x  
 #else  
 #define IF_FTOS(x)  
 #define FTOS (fp[0])  
 #endif  
   
 Cell *SP;  Cell *SP;
 Float *FP;  Float *FP;
   Address UP=NULL;
   
   #if 0
   /* not used currently */
 int emitcounter;  int emitcounter;
   #endif
 #define NULLC '\0'  #define NULLC '\0'
   
 char *cstr(Char *from, UCell size, int clear)  char *cstr(Char *from, UCell size, int clear)
 /* if clear is true, scratch can be reused, otherwise we want more of  /* return a C-string corresponding to the Forth string ( FROM SIZE ).
    the same */     the C-string lives until the next call of cstr with CLEAR being true */
 {  {
   static char *scratch=NULL;    static struct cstr_buffer {
   static unsigned scratchsize=0;      char *buffer;
   static char *nextscratch;      size_t size;
   char *oldnextscratch;    } *buffers=NULL;
     static int nbuffers=0;
     static int used=0;
     struct cstr_buffer *b;
   
     if (buffers==NULL)
       buffers=malloc(0);
   if (clear)    if (clear)
     nextscratch=scratch;      used=0;
   if (scratch==NULL) {    if (used>=nbuffers) {
     scratch=malloc(size+1);      buffers=realloc(buffers,sizeof(struct cstr_buffer)*(used+1));
     nextscratch=scratch;      buffers[used]=(struct cstr_buffer){malloc(0),0};
     scratchsize=size;      nbuffers=used+1;
   }    }
   else if (nextscratch+size>scratch+scratchsize) {    b=&buffers[used];
     char *oldscratch=scratch;    if (size+1 > b->size) {
     scratch = realloc(scratch, (nextscratch-scratch)+size+1);      b->buffer = realloc(b->buffer,size+1);
     nextscratch=scratch+(nextscratch-oldscratch);      b->size = size+1;
     scratchsize=size;    }
   }    memcpy(b->buffer,from,size);
   memcpy(nextscratch,from,size);    b->buffer[size]='\0';
   nextscratch[size]='\0';    used++;
   oldnextscratch = nextscratch;    return b->buffer;
   nextscratch += size+1;  
   return oldnextscratch;  
 }  }
   
 char *tilde_cstr(Char *from, UCell size, int clear)  char *tilde_cstr(Char *from, UCell size, int clear)
Line 110  char *tilde_cstr(Char *from, UCell size, Line 109  char *tilde_cstr(Char *from, UCell size,
     return cstr(from, size, clear);      return cstr(from, size, clear);
   if (size<2 || from[1]=='/') {    if (size<2 || from[1]=='/') {
     s1 = (char *)getenv ("HOME");      s1 = (char *)getenv ("HOME");
       if(s1 == NULL)
         s1 = "";
     s2 = from+1;      s2 = from+1;
     s2_len = size-1;      s2_len = size-1;
   } else {    } else {
     int i;      UCell i;
     for (i=1; i<size && from[i]!='/'; i++)      for (i=1; i<size && from[i]!='/'; i++)
       ;        ;
     {      {
Line 148  char *tilde_cstr(Char *from, UCell size, Line 149  char *tilde_cstr(Char *from, UCell size,
   
 static char* fileattr[6]={"r","rb","r+","r+b","w","wb"};  static char* fileattr[6]={"r","rb","r+","r+b","w","wb"};
   
 static Address up0=NULL;  #ifndef O_BINARY
   #define O_BINARY 0
   #endif
   #ifndef O_TEXT
   #define O_TEXT 0
   #endif
   
   static int ufileattr[6]= {
     O_RDONLY|O_TEXT, O_RDONLY|O_BINARY,
     O_RDWR  |O_TEXT, O_RDWR  |O_BINARY,
     O_WRONLY|O_TEXT, O_WRONLY|O_BINARY };
   
 /* if machine.h has not defined explicit registers, define them as implicit */  /* if machine.h has not defined explicit registers, define them as implicit */
 #ifndef IPREG  #ifndef IPREG
Line 179  static Address up0=NULL; Line 190  static Address up0=NULL;
 #define FTOSREG  #define FTOSREG
 #endif  #endif
   
   #ifndef CPU_DEP1
   # define CPU_DEP1 0
   #endif
   
   /* declare and compute cfa for certain threading variants */
   /* warning: this is nonsyntactical; it will not work in place of a statement */
   #ifdef CFA_NEXT
   #define DOCFA
   #else
   #define DOCFA   Xt cfa; GETCFA(cfa)
   #endif
   
 Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)  Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
 /* executes code at ip, if ip!=NULL  /* executes code at ip, if ip!=NULL
    returns array of machine code labels (for use in a loader), if ip==NULL     returns array of machine code labels (for use in a loader), if ip==NULL
Line 192  Label *engine(Xt *ip0, Cell *sp0, Cell * Line 215  Label *engine(Xt *ip0, Cell *sp0, Cell *
 #ifdef CFA_NEXT  #ifdef CFA_NEXT
   register Xt cfa CFAREG;    register Xt cfa CFAREG;
 #endif  #endif
   register Address up UPREG = up0;    register Address up UPREG = UP;
   IF_TOS(register Cell TOS TOSREG;)    IF_TOS(register Cell TOS TOSREG;)
   IF_FTOS(register Float FTOS FTOSREG;)    IF_FTOS(register Float FTOS FTOSREG;)
   #if defined(DOUBLY_INDIRECT)
     static Label *symbols;
     static void *routines[]= {
   #else /* !defined(DOUBLY_INDIRECT) */
   static Label symbols[]= {    static Label symbols[]= {
   #endif /* !defined(DOUBLY_INDIRECT) */
     &&docol,      &&docol,
     &&docon,      &&docon,
     &&dovar,      &&dovar,
Line 203  Label *engine(Xt *ip0, Cell *sp0, Cell * Line 231  Label *engine(Xt *ip0, Cell *sp0, Cell *
     &&dodefer,      &&dodefer,
     &&dofield,      &&dofield,
     &&dodoes,      &&dodoes,
     &&dodoes,  /* dummy for does handler address */      /* the following entry is normally unused;
          it's there because its index indicates a does-handler */
       CPU_DEP1,
 #include "prim_labels.i"  #include "prim_labels.i"
       0
   };    };
 #ifdef CPU_DEP  #ifdef CPU_DEP2
   CPU_DEP;    CPU_DEP2
 #endif  #endif
   
 #ifdef DEBUG  #ifdef DEBUG
Line 216  Label *engine(Xt *ip0, Cell *sp0, Cell * Line 247  Label *engine(Xt *ip0, Cell *sp0, Cell *
           (unsigned)fp,(unsigned)lp,(unsigned)up);            (unsigned)fp,(unsigned)lp,(unsigned)up);
 #endif  #endif
   
   if (ip == NULL)    if (ip == NULL) {
     return symbols;  #if defined(DOUBLY_INDIRECT)
   #define MAX_SYMBOLS 1000
       int i;
       Cell code_offset = offset_image? 11*sizeof(Cell) : 0;
   
       symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+code_offset)+code_offset);
       for (i=0; i<DOESJUMP+1; i++)
         symbols[i] = (Label)routines[i];
       for (; routines[i]!=0; i++) {
         if (i>=MAX_SYMBOLS) {
           fprintf(stderr,"gforth-ditc: more than %d primitives\n",MAX_SYMBOLS);
           exit(1);
       }
       symbols[i] = &routines[i];
     }
   #endif /* defined(DOUBLY_INDIRECT) */
     return symbols;
   }
   
   IF_TOS(TOS = sp[0]);    IF_TOS(TOS = sp[0]);
   IF_FTOS(FTOS = fp[0]);    IF_FTOS(FTOS = fp[0]);
 /*  prep_terminal(); */  /*  prep_terminal(); */
   NEXT_P0;    NEXT_P0;
   NEXT;    NEXT;
   
   #ifdef CPU_DEP3
     CPU_DEP3
   #endif
       
  docol:   docol:
 #ifndef CFA_NEXT  
   {    {
     Xt cfa; GETCFA(cfa);      DOCFA;
 #endif  
 #ifdef DEBUG  #ifdef DEBUG
   fprintf(stderr,"%08lx: col: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));      fprintf(stderr,"%08lx: col: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
 #endif  #endif
 #ifdef CISC_NEXT  #ifdef CISC_NEXT
   /* this is the simple version */      /* this is the simple version */
   *--rp = (Cell)ip;  
   ip = (Xt *)PFA1(cfa);  
   NEXT_P0;  
   NEXT;  
 #else  
   /* this one is important, so we help the compiler optimizing  
      The following version may be better (for scheduling), but probably has  
      problems with code fields employing calls and delay slots  
   */  
   {  
     DEF_CA  
     Xt *current_ip = (Xt *)PFA1(cfa);  
     cfa = *current_ip;  
     NEXT1_P1;  
     *--rp = (Cell)ip;      *--rp = (Cell)ip;
     ip = current_ip+1;      ip = (Xt *)PFA1(cfa);
     NEXT1_P2;      NEXT_P0;
   }      NEXT;
   #else
       /* this one is important, so we help the compiler optimizing
          The following version may be better (for scheduling), but probably has
          problems with code fields employing calls and delay slots
          */
       {
         DEF_CA
         Xt *current_ip = (Xt *)PFA1(cfa);
         cfa = *current_ip;
         NEXT1_P1;
         *--rp = (Cell)ip;
         ip = current_ip+1;
         NEXT1_P2;
       }
 #endif  #endif
 #ifndef CFA_NEXT  
   }    }
 #endif  
   
  docon:   docon:
 #ifndef CFA_NEXT  
   {    {
     Xt cfa; GETCFA(cfa);      DOCFA;
 #endif  
 #ifdef DEBUG  #ifdef DEBUG
   fprintf(stderr,"%08lx: con: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));      fprintf(stderr,"%08lx: con: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
 #endif  #endif
 #ifdef USE_TOS  #ifdef USE_TOS
   *sp-- = TOS;      *sp-- = TOS;
   TOS = *(Cell *)PFA1(cfa);      TOS = *(Cell *)PFA1(cfa);
 #else  #else
   *--sp = *(Cell *)PFA1(cfa);      *--sp = *(Cell *)PFA1(cfa);
 #endif  #endif
 #ifndef CFA_NEXT  
   }    }
 #endif  
   NEXT_P0;    NEXT_P0;
   NEXT;    NEXT;
       
  dovar:   dovar:
 #ifndef CFA_NEXT  
   {    {
     Xt cfa; GETCFA(cfa);      DOCFA;
 #endif  
 #ifdef DEBUG  #ifdef DEBUG
   fprintf(stderr,"%08lx: var: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));      fprintf(stderr,"%08lx: var: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
 #endif  #endif
 #ifdef USE_TOS  #ifdef USE_TOS
   *sp-- = TOS;      *sp-- = TOS;
   TOS = (Cell)PFA1(cfa);      TOS = (Cell)PFA1(cfa);
 #else  #else
   *--sp = (Cell)PFA1(cfa);      *--sp = (Cell)PFA1(cfa);
 #endif  #endif
 #ifndef CFA_NEXT  
   }    }
 #endif  
   NEXT_P0;    NEXT_P0;
   NEXT;    NEXT;
       
  douser:   douser:
 #ifndef CFA_NEXT  
   {    {
     Xt cfa; GETCFA(cfa);      DOCFA;
 #endif  
 #ifdef DEBUG  #ifdef DEBUG
   fprintf(stderr,"%08lx: user: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));      fprintf(stderr,"%08lx: user: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
 #endif  #endif
 #ifdef USE_TOS  #ifdef USE_TOS
   *sp-- = TOS;      *sp-- = TOS;
   TOS = (Cell)(up+*(Cell*)PFA1(cfa));      TOS = (Cell)(up+*(Cell*)PFA1(cfa));
 #else  #else
   *--sp = (Cell)(up+*(Cell*)PFA1(cfa));      *--sp = (Cell)(up+*(Cell*)PFA1(cfa));
 #endif  #endif
 #ifndef CFA_NEXT  
   }    }
 #endif  
   NEXT_P0;    NEXT_P0;
   NEXT;    NEXT;
       
  dodefer:   dodefer:
 #ifndef CFA_NEXT  
   {    {
     Xt cfa; GETCFA(cfa);      DOCFA;
 #endif  
 #ifdef DEBUG  #ifdef DEBUG
   fprintf(stderr,"%08lx: defer: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));      fprintf(stderr,"%08lx: defer: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
 #endif  #endif
   EXEC(*(Xt *)PFA1(cfa));      EXEC(*(Xt *)PFA1(cfa));
 #ifndef CFA_NEXT  
   }    }
 #endif  
   
  dofield:   dofield:
 #ifndef CFA_NEXT  
   {    {
     Xt cfa; GETCFA(cfa);      DOCFA;
 #endif  
 #ifdef DEBUG  #ifdef DEBUG
   fprintf(stderr,"%08lx: field: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));      fprintf(stderr,"%08lx: field: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
 #endif  #endif
   TOS += *(Cell*)PFA1(cfa);       TOS += *(Cell*)PFA1(cfa); 
 #ifndef CFA_NEXT  
   }    }
 #endif  
   NEXT_P0;    NEXT_P0;
   NEXT;    NEXT;
   
Line 364  Label *engine(Xt *ip0, Cell *sp0, Cell * Line 392  Label *engine(Xt *ip0, Cell *sp0, Cell *
      pfa:       pfa:
             
      */       */
 #ifndef CFA_NEXT  
   {    {
     Xt cfa; GETCFA(cfa);      DOCFA;
   
 /*    fprintf(stderr, "Got CFA %08lx at doescode %08lx/%08lx: does: %08lx\n",cfa,(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));*/      /*    fprintf(stderr, "Got CFA %08lx at doescode %08lx/%08lx: does: %08lx\n",cfa,(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));*/
 #endif  
 #ifdef DEBUG  #ifdef DEBUG
   fprintf(stderr,"%08lx/%08lx: does: %08lx\n",(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));      fprintf(stderr,"%08lx/%08lx: does: %08lx\n",(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));
   fflush(stderr);      fflush(stderr);
 #endif  #endif
   *--rp = (Cell)ip;      *--rp = (Cell)ip;
   /* PFA1 might collide with DOES_CODE1 here, so we use PFA */      /* PFA1 might collide with DOES_CODE1 here, so we use PFA */
   ip = DOES_CODE1(cfa);      ip = DOES_CODE1(cfa);
 #ifdef USE_TOS  #ifdef USE_TOS
   *sp-- = TOS;      *sp-- = TOS;
   TOS = (Cell)PFA(cfa);      TOS = (Cell)PFA(cfa);
 #else  #else
   *--sp = (Cell)PFA(cfa);      *--sp = (Cell)PFA(cfa);
 #endif  #endif
 #ifndef CFA_NEXT      /*    fprintf(stderr,"TOS = %08lx, IP=%08lx\n", TOS, IP);*/
 /*    fprintf(stderr,"TOS = %08lx, IP=%08lx\n", TOS, IP);*/  
   }    }
 #endif  
   NEXT_P0;    NEXT_P0;
   NEXT;    NEXT;
   

Removed from v.1.30  
changed lines
  Added in v.1.41


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