Diff for /gforth/engine/engine.c between versions 1.4 and 1.66

version 1.4, 1998/10/25 23:15:47 version 1.66, 2003/08/22 08:08:46
Line 1 Line 1
 /* Gforth virtual machine (aka inner interpreter)  /* Gforth virtual machine (aka inner interpreter)
   
   Copyright (C) 1995 Free Software Foundation, Inc.    Copyright (C) 1995,1996,1997,1998,2000,2003 Free Software Foundation, Inc.
   
   This file is part of Gforth.    This file is part of Gforth.
   
Line 16 Line 16
   
   You should have received a copy of the GNU General Public License    You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software    along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 */  */
   
 #include "config.h"  #include "config.h"
   #include "forth.h"
 #include <ctype.h>  #include <ctype.h>
 #include <stdio.h>  #include <stdio.h>
 #include <string.h>  #include <string.h>
Line 27 Line 28
 #include <assert.h>  #include <assert.h>
 #include <stdlib.h>  #include <stdlib.h>
 #include <errno.h>  #include <errno.h>
 #include "forth.h"  
 #include "io.h"  #include "io.h"
 #include "threaded.h"  #include "threaded.h"
 #ifndef STANDALONE  #ifndef STANDALONE
Line 38 Line 38
 #include <sys/time.h>  #include <sys/time.h>
 #include <unistd.h>  #include <unistd.h>
 #include <pwd.h>  #include <pwd.h>
   #include <dirent.h>
   #include <sys/resource.h>
   #ifdef HAVE_FNMATCH_H
   #include <fnmatch.h>
   #else
   #include "fnmatch.h"
   #endif
 #else  #else
 #include "systypes.h"  #include "systypes.h"
 #endif  #endif
Line 45 Line 52
 #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */  #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
 #include <dlfcn.h>  #include <dlfcn.h>
 #endif  #endif
   #if defined(_WIN32)
   #include <windows.h>
   #endif
 #ifdef hpux  #ifdef hpux
 #include <dl.h>  #include <dl.h>
 #endif  #endif
   
   #ifdef HAS_FFCALL
   #include <avcall.h>
   #include <callback.h>
   #endif
   
 #ifndef SEEK_SET  #ifndef SEEK_SET
 /* should be defined in stdio.h, but some systems don't have it */  /* should be defined in stdio.h, but some systems don't have it */
 #define SEEK_SET 0  #define SEEK_SET 0
 #endif  #endif
   
 #define IOR(flag)       ((flag)? -512-errno : 0)  #ifndef HAVE_FSEEKO
   #define fseeko fseek
   #endif
   
 struct F83Name {  #ifndef HAVE_FTELLO
   struct F83Name *next;  /* the link field for old hands */  #define ftello ftell
   char          countetc;  
   char          name[0];  
 };  
   
 /* are macros for setting necessary? */  
 #define F83NAME_COUNT(np)       ((np)->countetc & 0x1f)  
 #define F83NAME_SMUDGE(np)      (((np)->countetc & 0x40) != 0)  
 #define F83NAME_IMMEDIATE(np)   (((np)->countetc & 0x20) != 0)  
   
 Cell *SP;  
 Float *FP;  
 Address UP=NULL;  
   
 #if 0  
 /* not used currently */  
 int emitcounter;  
 #endif  #endif
 #define NULLC '\0'  
   
 char *cstr(Char *from, UCell size, int clear)  #define NULLC '\0'
 /* return a C-string corresponding to the Forth string ( FROM SIZE ).  
    the C-string lives until the next call of cstr with CLEAR being true */  
 {  
   static struct cstr_buffer {  
     char *buffer;  
     size_t size;  
   } *buffers=NULL;  
   static int nbuffers=0;  
   static int used=0;  
   struct cstr_buffer *b;  
   
   if (buffers==NULL)  
     buffers=malloc(0);  
   if (clear)  
     used=0;  
   if (used>=nbuffers) {  
     buffers=realloc(buffers,sizeof(struct cstr_buffer)*(used+1));  
     buffers[used]=(struct cstr_buffer){malloc(0),0};  
     nbuffers=used+1;  
   }  
   b=&buffers[used];  
   if (size+1 > b->size) {  
     b->buffer = realloc(b->buffer,size+1);  
     b->size = size+1;  
   }  
   memcpy(b->buffer,from,size);  
   b->buffer[size]='\0';  
   used++;  
   return b->buffer;  
 }  
   
 #ifdef STANDALONE  #ifdef MEMCMP_AS_SUBROUTINE
 char *tilde_cstr(Char *from, UCell size, int clear)  extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
 {  #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
   return cstr(from, size, clear);  #endif
 }  
 #else  
 char *tilde_cstr(Char *from, UCell size, int clear)  
 /* like cstr(), but perform tilde expansion on the string */  
 {  
   char *s1,*s2;  
   int s1_len, s2_len;  
   struct passwd *getpwnam (), *user_entry;  
   
   if (size<1 || from[0]!='~')  
     return cstr(from, size, clear);  
   if (size<2 || from[1]=='/') {  
     s1 = (char *)getenv ("HOME");  
     if(s1 == NULL)  
       s1 = "";  
     s2 = from+1;  
     s2_len = size-1;  
   } else {  
     UCell i;  
     for (i=1; i<size && from[i]!='/'; i++)  
       ;  
     {  
       char user[i];  
       memcpy(user,from+1,i-1);  
       user[i-1]='\0';  
       user_entry=getpwnam(user);  
     }  
     if (user_entry==NULL)  
       return cstr(from, size, clear);  
     s1 = user_entry->pw_dir;  
     s2 = from+i;  
     s2_len = size-i;  
   }  
   s1_len = strlen(s1);  
   if (s1_len>1 && s1[s1_len-1]=='/')  
     s1_len--;  
   {  
     char path[s1_len+s2_len];  
     memcpy(path,s1,s1_len);  
     memcpy(path+s1_len,s2,s2_len);  
     return cstr(path,s1_len+s2_len,clear);  
   }  
 }  
 #endif     
   
 #define NEWLINE '\n'  #define NEWLINE '\n'
   
 #ifndef HAVE_RINT  /* conversion on fetch */
 #define rint(x) floor((x)+0.5)  
 #endif  
   
 static char* fileattr[6]={"r","rb","r+","r+b","w","wb"};  #define vm_Cell2f(_cell,_x)             ((_x)=(Bool)(_cell))
   #define vm_Cell2c(_cell,_x)             ((_x)=(Char)(_cell))
   #define vm_Cell2n(_cell,_x)             ((_x)=(Cell)(_cell))
   #define vm_Cell2w(_cell,_x)             ((_x)=(Cell)(_cell))
   #define vm_Cell2u(_cell,_x)             ((_x)=(UCell)(_cell))
   #define vm_Cell2a_(_cell,_x)            ((_x)=(Cell *)(_cell))
   #define vm_Cell2c_(_cell,_x)            ((_x)=(Char *)(_cell))
   #define vm_Cell2f_(_cell,_x)            ((_x)=(Float *)(_cell))
   #define vm_Cell2df_(_cell,_x)           ((_x)=(DFloat *)(_cell))
   #define vm_Cell2sf_(_cell,_x)           ((_x)=(SFloat *)(_cell))
   #define vm_Cell2xt(_cell,_x)            ((_x)=(Xt)(_cell))
   #define vm_Cell2f83name(_cell,_x)       ((_x)=(struct F83Name *)(_cell))
   #define vm_Cell2longname(_cell,_x)      ((_x)=(struct Longname *)(_cell))
   #define vm_Float2r(_float,_x)           (_x=_float)
   
   /* conversion on store */
   
   #define vm_f2Cell(_x,_cell)             ((_cell)=(Cell)(_x))
   #define vm_c2Cell(_x,_cell)             ((_cell)=(Cell)(_x))
   #define vm_n2Cell(_x,_cell)             ((_cell)=(Cell)(_x))
   #define vm_w2Cell(_x,_cell)             ((_cell)=(Cell)(_x))
   #define vm_u2Cell(_x,_cell)             ((_cell)=(Cell)(_x))
   #define vm_a_2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
   #define vm_c_2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
   #define vm_f_2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
   #define vm_df_2Cell(_x,_cell)           ((_cell)=(Cell)(_x))
   #define vm_sf_2Cell(_x,_cell)           ((_cell)=(Cell)(_x))
   #define vm_xt2Cell(_x,_cell)            ((_cell)=(Cell)(_x))
   #define vm_f83name2Cell(_x,_cell)       ((_cell)=(Cell)(_x))
   #define vm_longname2Cell(_x,_cell)      ((_cell)=(Cell)(_x))
   #define vm_r2Float(_x,_float)           (_float=_x)
   
 #ifndef O_BINARY  #define vm_Cell2Cell(_x,_y)             (_y=_x)
 #define O_BINARY 0  
 #endif  
 #ifndef O_TEXT  
 #define O_TEXT 0  
 #endif  
   
 static int ufileattr[6]= {  #ifdef NO_IP
   O_RDONLY|O_TEXT, O_RDONLY|O_BINARY,  #define IMM_ARG(access,value)           (VARIANT(value))
   O_RDWR  |O_TEXT, O_RDWR  |O_BINARY,  #else
   O_WRONLY|O_TEXT, O_WRONLY|O_BINARY };  #define IMM_ARG(access,value)           (access)
   #endif
   
 /* 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 211  static int ufileattr[6]= { Line 161  static int ufileattr[6]= {
 # define CPU_DEP1 0  # define CPU_DEP1 0
 #endif  #endif
   
 /* declare and compute cfa for certain threading variants */  /* instructions containing SUPER_END must be the last instruction of a
 /* warning: this is nonsyntactical; it will not work in place of a statement */     super-instruction (e.g., branches, EXECUTE, and other instructions
 #ifdef CFA_NEXT     ending the basic block). Instructions containing SET_IP get this
 #define DOCFA     automatically, so you usually don't have to write it.  If you have
      to write it, write it after IP points to the next instruction.
      Used for profiling.  Don't write it in a word containing SET_IP, or
      the following block will be counted twice. */
   #ifdef VM_PROFILING
   #define SUPER_END  vm_count_block(IP)
 #else  #else
 #define DOCFA   Xt cfa; GETCFA(cfa)  #define SUPER_END
 #endif  #endif
   #define SUPER_CONTINUE
   
   #ifdef GFORTH_DEBUGGING
   #define NAME(string) { saved_ip=ip; asm(""); }
   /* the asm here is to avoid reordering of following stuff above the
      assignment; this is an old-style asm (no operands), and therefore
      is treated like "asm volatile ..."; i.e., it prevents most
      reorderings across itself.  We want the assignment above first,
      because the stack loads may already cause a stack underflow. */
   #elif DEBUG
   #       define  NAME(string)    fprintf(stderr,"%08lx depth=%3ld: "string"\n",(Cell)ip,sp0+3-sp);
   #else
   #       define  NAME(string)
   #endif
   
   #ifdef DEBUG
   #define CFA_TO_NAME(__cfa) \
         Cell len, i; \
         char * name = __cfa; \
         for(i=0; i<32; i+=sizeof(Cell)) { \
           len = ((Cell*)name)[-1]; \
           if(len < 0) { \
             len &= 0x1F; \
             if((len+sizeof(Cell)) > i) break; \
           } len = 0; \
           name -= sizeof(Cell); \
         }
   #endif
   
   #ifdef HAS_FFCALL
   #define SAVE_REGS IF_spTOS(sp[0]=spTOS); IF_fpTOS(fp[0]=fpTOS); SP=sp; FP=fp; RP=rp; LP=lp;
   #define REST_REGS sp=SP; fp=FP; rp=RP; lp=LP; IF_spTOS(spTOS=sp[0]); IF_fpTOS(fpTOS=fp[0]);
   #endif
   
   #if !defined(ENGINE)
   /* normal engine */
   #define VARIANT(v)      (v)
   #define JUMP(target)    goto I_noop
   #define LABEL(name) J_##name: asm(""); I_##name:
   
   #elif ENGINE==2
   /* variant with padding between VM instructions for finding out
      cross-inst jumps (for dynamic code) */
   #define engine engine2
   #define VARIANT(v)      (v)
   #define JUMP(target)    goto I_noop
   #define LABEL(name) J_##name: SKIP16; I_##name:
   #define IN_ENGINE2
   
   #elif ENGINE==3
   /* variant with different immediate arguments for finding out
      immediate arguments (for native code) */
   #define engine engine3
   #define VARIANT(v)      ((v)^0xffffffff)
   #define JUMP(target)    goto K_lit
   #define LABEL(name) J_##name: asm(""); I_##name:
   #else
   #error illegal ENGINE value
   #endif /* ENGINE */
   
   #define LABEL2(name) K_##name:
   
 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
 */  */
 {  {
   #ifndef GFORTH_DEBUGGING
     register Cell *rp RPREG;
   #endif
   #ifndef NO_IP
   register Xt *ip IPREG = ip0;    register Xt *ip IPREG = ip0;
   #endif
   register Cell *sp SPREG = sp0;    register Cell *sp SPREG = sp0;
   register Cell *rp RPREG = rp0;  
   register Float *fp FPREG = fp0;    register Float *fp FPREG = fp0;
   register Address lp LPREG = lp0;    register Address lp LPREG = lp0;
 #ifdef CFA_NEXT  
   register Xt cfa CFAREG;    register Xt cfa CFAREG;
   #ifdef MORE_VARS
     MORE_VARS
   #endif
   #ifdef HAS_FFCALL
     av_alist alist;
     extern va_alist clist;
     float frv;
     int irv;
     double drv;
     long long llrv;
     void * prv;
 #endif  #endif
   register Address up UPREG = UP;    register Address up UPREG = UP;
   IF_TOS(register Cell TOS TOSREG;)    IF_spTOS(register Cell spTOS TOSREG;)
   IF_FTOS(register Float FTOS FTOSREG;)    IF_fpTOS(register Float fpTOS FTOSREG;)
 #if defined(DOUBLY_INDIRECT)  #if defined(DOUBLY_INDIRECT)
   static Label *symbols;    static Label *symbols;
   static void *routines[]= {    static void *routines[]= {
   #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
 #else /* !defined(DOUBLY_INDIRECT) */  #else /* !defined(DOUBLY_INDIRECT) */
   static Label symbols[]= {    static Label symbols[]= {
   #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
 #endif /* !defined(DOUBLY_INDIRECT) */  #endif /* !defined(DOUBLY_INDIRECT) */
     (Label)&&docol,  #define INST_ADDR(name) ((Label)&&I_##name)
     (Label)&&docon,  
     (Label)&&dovar,  
     (Label)&&douser,  
     (Label)&&dodefer,  
     (Label)&&dofield,  
     (Label)&&dodoes,  
     /* the following entry is normally unused;  
        it's there because its index indicates a does-handler */  
     CPU_DEP1,  
 #include "prim_lab.i"  #include "prim_lab.i"
     (Label)0  #undef INST_ADDR
       (Label)0,
   #define INST_ADDR(name) ((Label)&&K_##name)
   #include "prim_lab.i"
   #undef INST_ADDR
   #define INST_ADDR(name) ((Label)&&J_##name)
   #include "prim_lab.i"
   #undef INST_ADDR
       (Label)&&after_last
   };    };
 #ifdef CPU_DEP2  #ifdef CPU_DEP2
   CPU_DEP2    CPU_DEP2
 #endif  #endif
   
     rp = rp0;
 #ifdef DEBUG  #ifdef DEBUG
   fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",    fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
           (unsigned)ip,(unsigned)sp,(unsigned)rp,            (unsigned)ip0,(unsigned)sp,(unsigned)rp,
           (unsigned)fp,(unsigned)lp,(unsigned)up);            (unsigned)fp,(unsigned)lp,(unsigned)up);
 #endif  #endif
   
   if (ip == NULL) {    if (ip0 == NULL) {
 #if defined(DOUBLY_INDIRECT)  #if defined(DOUBLY_INDIRECT)
 #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))  #define CODE_OFFSET (26*sizeof(Cell))
 #define CODE_OFFSET (22*sizeof(Cell))  #define XT_OFFSET (22*sizeof(Cell))
     int i;      int i;
     Cell code_offset = offset_image? CODE_OFFSET : 0;      Cell code_offset = offset_image? CODE_OFFSET : 0;
       Cell xt_offset = offset_image? XT_OFFSET : 0;
   
     symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);      symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
       xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
     for (i=0; i<DOESJUMP+1; i++)      for (i=0; i<DOESJUMP+1; i++)
       symbols[i] = (Label)routines[i];        xts[i] = symbols[i] = (Label)routines[i];
     for (; routines[i]!=0; i++) {      for (; routines[i]!=0; i++) {
       if (i>=MAX_SYMBOLS) {        if (i>=MAX_SYMBOLS) {
         fprintf(stderr,"gforth-ditc: more than %d primitives\n",MAX_SYMBOLS);          fprintf(stderr,"gforth-ditc: more than %ld primitives\n",(long)MAX_SYMBOLS);
         exit(1);          exit(1);
         }
         xts[i] = symbols[i] = &routines[i];
     }      }
     symbols[i] = &routines[i];  
   }  
 #endif /* defined(DOUBLY_INDIRECT) */  #endif /* defined(DOUBLY_INDIRECT) */
   return symbols;      return symbols;
 }  
   
   IF_TOS(TOS = sp[0]);  
   IF_FTOS(FTOS = fp[0]);  
 /*  prep_terminal(); */  
   NEXT_P0;  
   NEXT;  
   
 #ifdef CPU_DEP3  
   CPU_DEP3  
 #endif  
     
  docol:  
   {  
     DOCFA;  
 #ifdef DEBUG  
     fprintf(stderr,"%08lx: col: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));  
 #endif  
 #ifdef CISC_NEXT  
     /* 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;  
       ip = current_ip+1;  
       NEXT1_P2;  
     }  
 #endif  
   }    }
   
  docon:    IF_spTOS(spTOS = sp[0]);
   {    IF_fpTOS(fpTOS = fp[0]);
     DOCFA;  /*  prep_terminal(); */
 #ifdef DEBUG  #ifdef NO_IP
     fprintf(stderr,"%08lx: con: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));    goto *(*(Label *)ip0);
 #endif  
 #ifdef USE_TOS  
     *sp-- = TOS;  
     TOS = *(Cell *)PFA1(cfa);  
 #else  
     *--sp = *(Cell *)PFA1(cfa);  
 #endif  
   }  
   NEXT_P0;  
   NEXT;  
     
  dovar:  
   {  
     DOCFA;  
 #ifdef DEBUG  
     fprintf(stderr,"%08lx: var: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));  
 #endif  
 #ifdef USE_TOS  
     *sp-- = TOS;  
     TOS = (Cell)PFA1(cfa);  
 #else  
     *--sp = (Cell)PFA1(cfa);  
 #endif  
   }  
   NEXT_P0;  
   NEXT;  
     
  douser:  
   {  
     DOCFA;  
 #ifdef DEBUG  
     fprintf(stderr,"%08lx: user: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));  
 #endif  
 #ifdef USE_TOS  
     *sp-- = TOS;  
     TOS = (Cell)(up+*(Cell*)PFA1(cfa));  
 #else  #else
     *--sp = (Cell)(up+*(Cell*)PFA1(cfa));    SET_IP(ip);
 #endif    SUPER_END; /* count the first block, too */
   }  
   NEXT_P0;  
   NEXT;    NEXT;
     
  dodefer:  
   {  
     DOCFA;  
 #ifdef DEBUG  
     fprintf(stderr,"%08lx: defer: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));  
 #endif  
     EXEC(*(Xt *)PFA1(cfa));  
   }  
   
  dofield:  
   {  
     DOCFA;  
 #ifdef DEBUG  
     fprintf(stderr,"%08lx: field: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));  
 #endif  #endif
     TOS += *(Cell*)PFA1(cfa);   
   }  
   NEXT_P0;  
   NEXT;  
   
  dodoes:  #ifdef CPU_DEP3
   /* this assumes the following structure:    CPU_DEP3
      defining-word:  
        
      ...  
      DOES>  
      (possible padding)  
      possibly handler: jmp dodoes  
      (possible branch delay slot(s))  
      Forth code after DOES>  
        
      defined word:  
        
      cfa: address of or jump to handler OR  
           address of or jump to dodoes, address of DOES-code  
      pfa:  
        
      */  
   {  
     DOCFA;  
   
     /*    fprintf(stderr, "Got CFA %08lx at doescode %08lx/%08lx: does: %08lx\n",cfa,(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));*/  
 #ifdef DEBUG  
     fprintf(stderr,"%08lx/%08lx: does: %08lx\n",(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));  
     fflush(stderr);  
 #endif  
     *--rp = (Cell)ip;  
     /* PFA1 might collide with DOES_CODE1 here, so we use PFA */  
     ip = DOES_CODE1(cfa);  
 #ifdef USE_TOS  
     *sp-- = TOS;  
     TOS = (Cell)PFA(cfa);  
 #else  
     *--sp = (Cell)PFA(cfa);  
 #endif  #endif
     /*    fprintf(stderr,"TOS = %08lx, IP=%08lx\n", TOS, IP);*/  
   }  
   NEXT_P0;  
   NEXT;  
   
 #include "prim.i"  #include "prim.i"
     after_last: return (Label *)0;
     /*needed only to get the length of the last primitive */
 }  }

Removed from v.1.4  
changed lines
  Added in v.1.66


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