Diff for /gforth/engine/engine.c between versions 1.64 and 1.92

version 1.64, 2003/08/15 14:07:04 version 1.92, 2006/10/22 16:54:01
Line 1 Line 1
 /* Gforth virtual machine (aka inner interpreter)  /* Gforth virtual machine (aka inner interpreter)
   
   Copyright (C) 1995,1996,1997,1998,2000,2003 Free Software Foundation, Inc.    Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005 Free Software Foundation, Inc.
   
   This file is part of Gforth.    This file is part of Gforth.
   
Line 19 Line 19
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 */  */
   
   #if defined(GFORTH_DEBUGGING) || defined(INDIRECT_THREADED) || defined(DOUBLY_INDIRECT) || defined(VM_PROFILING)
   #define USE_NO_TOS
   #else
   #define USE_TOS
   #endif
   #define USE_NO_FTOS
   
 #include "config.h"  #include "config.h"
 #include "forth.h"  #include "forth.h"
 #include <ctype.h>  #include <ctype.h>
Line 39 Line 46
 #include <unistd.h>  #include <unistd.h>
 #include <pwd.h>  #include <pwd.h>
 #include <dirent.h>  #include <dirent.h>
   #include <wchar.h>
 #include <sys/resource.h>  #include <sys/resource.h>
 #ifdef HAVE_FNMATCH_H  #ifdef HAVE_FNMATCH_H
 #include <fnmatch.h>  #include <fnmatch.h>
Line 64 Line 72
 #include <callback.h>  #include <callback.h>
 #endif  #endif
   
   #ifdef HAS_LIBFFI
   #include <ffi.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
Line 85  extern int gforth_memcmp(const char * s1 Line 97  extern int gforth_memcmp(const char * s1
 #endif  #endif
   
 #define NEWLINE '\n'  #define NEWLINE '\n'
   #define CELL_MIN (((Cell)1)<<(sizeof(Cell)*CHAR_BIT-1))
   /* set CHECK_DIVISION to 0 if the hardware checks division by zero and
      division overflow.  Note that not all checks are controlled by
      CHECK_DIVISION, in particular not overflow checks in mixed-size
      words implemented by C's double-by-double division, because that
      division does not signal such overflows.  !! make an autoconf test
      that sets CHECK_DIVISION */
   #define CHECK_DIVISION 1
   
 /* conversion on fetch */  /* conversion on fetch */
   
Line 144  extern int gforth_memcmp(const char * s1 Line 164  extern int gforth_memcmp(const char * s1
 #ifndef LPREG  #ifndef LPREG
 #define LPREG  #define LPREG
 #endif  #endif
   #ifndef CAREG
   #define CAREG
   #endif
 #ifndef CFAREG  #ifndef CFAREG
 #define CFAREG  #define CFAREG
 #endif  #endif
Line 153  extern int gforth_memcmp(const char * s1 Line 176  extern int gforth_memcmp(const char * s1
 #ifndef TOSREG  #ifndef TOSREG
 #define TOSREG  #define TOSREG
 #endif  #endif
   #ifndef spbREG
   #define spbREG
   #endif
   #ifndef spcREG
   #define spcREG
   #endif
   #ifndef spdREG
   #define spdREG
   #endif
   #ifndef speREG
   #define speREG
   #endif
   #ifndef spfREG
   #define spfREG
   #endif
   #ifndef spgREG
   #define spgREG
   #endif
   #ifndef sphREG
   #define sphREG
   #endif
 #ifndef FTOSREG  #ifndef FTOSREG
 #define FTOSREG  #define FTOSREG
 #endif  #endif
Line 175  extern int gforth_memcmp(const char * s1 Line 219  extern int gforth_memcmp(const char * s1
 #endif  #endif
 #define SUPER_CONTINUE  #define SUPER_CONTINUE
   
   #ifdef GFORTH_DEBUGGING
   #if DEBUG
   #define NAME(string) { saved_ip=ip; asm("# "string); fprintf(stderr,"%08lx depth=%3ld: "string"\n",(Cell)ip,sp0+3-sp);}
   #else /* !DEBUG */
   #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. */
   #endif /* !DEBUG */
   #elif DEBUG
   #       define  NAME(string)    {Cell __depth=sp0+3-sp; int i; fprintf(stderr,"%08lx depth=%3ld: "string,(Cell)ip,sp0+3-sp); for (i=__depth-1; i>0; i--) fprintf(stderr, " $%lx",sp[i]); fprintf(stderr, " $%lx\n",spTOS); }
   #else
   #       define  NAME(string) asm("# "string);
   #endif
   
 #ifdef DEBUG  #ifdef DEBUG
 #define CFA_TO_NAME(__cfa) \  #define CFA_TO_NAME(__cfa) \
       Cell len, i; \        Cell len, i; \
Line 189  extern int gforth_memcmp(const char * s1 Line 250  extern int gforth_memcmp(const char * s1
       }        }
 #endif  #endif
   
 #ifdef HAS_FFCALL  #if defined(HAS_FFCALL) || defined(HAS_LIBFFI)
 #define SAVE_REGS IF_spTOS(sp[0]=spTOS); IF_fpTOS(fp[0]=fpTOS); SP=sp; FP=fp; RP=rp; LP=lp;  #define SAVE_REGS IF_fpTOS(fp[0]=fpTOS); gforth_SP=sp; gforth_FP=fp; gforth_RP=rp; gforth_LP=lp;
 #define REST_REGS sp=SP; fp=FP; rp=RP; lp=LP; IF_spTOS(spTOS=sp[0]); IF_fpTOS(fpTOS=fp[0]);  #define REST_REGS sp=gforth_SP; fp=gforth_FP; rp=gforth_RP; lp=gforth_LP; IF_fpTOS(fpTOS=fp[0]);
 #endif  #endif
   
 #if !defined(ENGINE)  #if !defined(ENGINE)
 /* normal engine */  /* normal engine */
 #define VARIANT(v)      (v)  #define VARIANT(v)      (v)
 #define JUMP(target)    goto I_noop  #define JUMP(target)    goto I_noop
 #define LABEL(name) J_##name: asm(""); I_##name:  #define LABEL(name) H_##name: asm(""); I_##name:
   
 #elif ENGINE==2  #elif ENGINE==2
 /* variant with padding between VM instructions for finding out  /* variant with padding between VM instructions for finding out
    cross-inst jumps (for dynamic code) */     cross-inst jumps (for dynamic code) */
 #define engine engine2  #define gforth_engine gforth_engine2
 #define VARIANT(v)      (v)  #define VARIANT(v)      (v)
 #define JUMP(target)    goto I_noop  #define JUMP(target)    goto I_noop
 #define LABEL(name) J_##name: SKIP16; I_##name:  #define LABEL(name) H_##name: SKIP16; I_##name:
 #define IN_ENGINE2  
   
 #elif ENGINE==3  #elif ENGINE==3
 /* variant with different immediate arguments for finding out  /* variant with different immediate arguments for finding out
    immediate arguments (for native code) */     immediate arguments (for native code) */
 #define engine engine3  #define gforth_engine gforth_engine3
 #define VARIANT(v)      ((v)^0xffffffff)  #define VARIANT(v)      ((v)^0xffffffff)
 #define JUMP(target)    goto K_lit  #define JUMP(target)    goto K_lit
 #define LABEL(name) J_##name: asm(""); I_##name:  #define LABEL(name) H_##name: asm(""); I_##name:
 #else  #else
 #error illegal ENGINE value  #error illegal ENGINE value
 #endif /* ENGINE */  #endif /* ENGINE */
   
 #define LABEL2(name) K_##name:  /* the asm(""); is there to get a stop compiled on Itanium */
   #define LABEL2(name) K_##name: asm("");
   #define LABEL3(name) J_##name: asm("");
   
 Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)  Label *gforth_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 237  Label *engine(Xt *ip0, Cell *sp0, Cell * Line 299  Label *engine(Xt *ip0, Cell *sp0, Cell *
   register Float *fp FPREG = fp0;    register Float *fp FPREG = fp0;
   register Address lp LPREG = lp0;    register Address lp LPREG = lp0;
   register Xt cfa CFAREG;    register Xt cfa CFAREG;
     register Label real_ca CAREG;
 #ifdef MORE_VARS  #ifdef MORE_VARS
   MORE_VARS    MORE_VARS
 #endif  #endif
 #ifdef HAS_FFCALL  #ifdef HAS_FFCALL
   av_alist alist;    av_alist alist;
   extern va_alist clist;    extern va_alist gforth_clist;
   float frv;    float frv;
   int irv;    int irv;
   double drv;    double drv;
   long long llrv;    long long llrv;
   void * prv;    void * prv;
 #endif  #endif
   register Address up UPREG = UP;  #ifdef HAS_LIBFFI
   IF_spTOS(register Cell spTOS TOSREG;)    extern void * gforth_ritem;
     extern void ** gforth_clist;
     extern void ffi_callback(ffi_cif * cif, void * resp, void ** args, Xt * ip);
   #endif
     register Address up UPREG = gforth_UP;
     register Cell MAYBE_UNUSED spTOS TOSREG;
     register Cell MAYBE_UNUSED spb spbREG;
     register Cell MAYBE_UNUSED spc spcREG;
     register Cell MAYBE_UNUSED spd spdREG;
     register Cell MAYBE_UNUSED spe speREG;
     register Cell MAYBE_UNUSED spf speREG;
     register Cell MAYBE_UNUSED spg speREG;
     register Cell MAYBE_UNUSED sph speREG;
   IF_fpTOS(register Float fpTOS FTOSREG;)    IF_fpTOS(register Float fpTOS FTOSREG;)
 #if defined(DOUBLY_INDIRECT)  #if defined(DOUBLY_INDIRECT)
   static Label *symbols;    static Label *symbols;
Line 260  Label *engine(Xt *ip0, Cell *sp0, Cell * Line 335  Label *engine(Xt *ip0, Cell *sp0, Cell *
   static Label symbols[]= {    static Label symbols[]= {
 #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))  #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
 #endif /* !defined(DOUBLY_INDIRECT) */  #endif /* !defined(DOUBLY_INDIRECT) */
     (Label)&&docol,  
     (Label)&&docon,  
     (Label)&&dovar,  
     (Label)&&douser,  
     (Label)&&dodefer,  
     (Label)&&dofield,  
     (Label)&&dodoes,  
     /* the following entry is normally unused;  
        it is there because its index indicates a does-handler */  
     CPU_DEP1,  
 #define INST_ADDR(name) ((Label)&&I_##name)  #define INST_ADDR(name) ((Label)&&I_##name)
 #include "prim_lab.i"  #include PRIM_LAB_I
 #undef INST_ADDR  #undef INST_ADDR
     (Label)&&after_last,  
     (Label)0,      (Label)0,
 #define INST_ADDR(name) ((Label)&&K_##name)  #define INST_ADDR(name) ((Label)&&K_##name)
 #include "prim_lab.i"  #include PRIM_LAB_I
 #undef INST_ADDR  #undef INST_ADDR
 #define INST_ADDR(name) ((Label)&&J_##name)  #define INST_ADDR(name) ((Label)&&J_##name)
 #include "prim_lab.i"  #include PRIM_LAB_I
   #undef INST_ADDR
       (Label)&&after_last,
       (Label)&&before_goto,
       (Label)&&after_goto,
   /* just mention the H_ labels, so the SKIP16s are not optimized away */
   #define INST_ADDR(name) ((Label)&&H_##name)
   #include PRIM_LAB_I
 #undef INST_ADDR  #undef INST_ADDR
     (Label)&&after_last  
   };    };
 #ifdef CPU_DEP2  #ifdef CPU_DEP2
   CPU_DEP2    CPU_DEP2
Line 317  Label *engine(Xt *ip0, Cell *sp0, Cell * Line 387  Label *engine(Xt *ip0, Cell *sp0, Cell *
     return symbols;      return symbols;
   }    }
   
   IF_spTOS(spTOS = sp[0]);  #if !(defined(GFORTH_DEBUGGING) || defined(INDIRECT_THREADED) || defined(DOUBLY_INDIRECT) || defined(VM_PROFILING))
     sp += STACK_CACHE_DEFAULT-1;
     /* some of those registers are dead, but its simpler to initialize them all */  spTOS = sp[0];
     spb = sp[-1];
     spc = sp[-2];
     spd = sp[-3];
     spe = sp[-4];
     spf = sp[-5];
     spg = sp[-6];
     sph = sp[-7];
   #endif
   
   IF_fpTOS(fpTOS = fp[0]);    IF_fpTOS(fpTOS = fp[0]);
 /*  prep_terminal(); */  /*  prep_terminal(); */
 #ifdef NO_IP  #ifdef NO_IP
   goto *(*(Label *)ip0);    goto *(*(Label *)ip0);
     before_goto:
     goto *real_ca;
     after_goto:;
 #else  #else
   SET_IP(ip);    SET_IP(ip);
   SUPER_END; /* count the first block, too */    SUPER_END; /* count the first block, too */
   NEXT;    FIRST_NEXT;
 #endif  #endif
   
 #ifdef CPU_DEP3  #ifdef CPU_DEP3
   CPU_DEP3    CPU_DEP3
 #endif  #endif
     
  docol:  
   {  
 #ifdef NO_IP  
     *--rp = next_code;  
     goto **(Label *)PFA1(cfa);  
 #else  
 #ifdef DEBUG  
     {  
       CFA_TO_NAME(cfa);  
       fprintf(stderr,"%08lx: col: %08lx %.*s\n",(Cell)ip,(Cell)PFA1(cfa),  
               len,name);  
     }  
 #endif  
 #ifdef CISC_NEXT  
     /* this is the simple version */  
     *--rp = (Cell)ip;  
     SET_IP((Xt *)PFA1(cfa));  
     SUPER_END;  
     NEXT;  
 #else  
     /* this one is important, so we help the compiler optimizing */  
     {  
       DEF_CA  
       rp[-1] = (Cell)ip;  
       SET_IP((Xt *)PFA1(cfa));  
       SUPER_END;  
       NEXT_P1;  
       rp--;  
       NEXT_P2;  
     }  
 #endif  
 #endif  
   }  
   
  docon:  #include PRIM_I
   {  
 #ifdef DEBUG  
     fprintf(stderr,"%08lx: con: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));  
 #endif  
 #ifdef USE_TOS  
     *sp-- = spTOS;  
     spTOS = *(Cell *)PFA1(cfa);  
 #else  
     *--sp = *(Cell *)PFA1(cfa);  
 #endif  
   }  
 #ifdef NO_IP  
   goto *next_code;  
 #else  
   NEXT_P0;  
   NEXT;  
 #endif  
     
  dovar:  
   {  
 #ifdef DEBUG  
     fprintf(stderr,"%08lx: var: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));  
 #endif  
 #ifdef USE_TOS  
     *sp-- = spTOS;  
     spTOS = (Cell)PFA1(cfa);  
 #else  
     *--sp = (Cell)PFA1(cfa);  
 #endif  
   }  
 #ifdef NO_IP  
   goto *next_code;  
 #else  
   NEXT_P0;  
   NEXT;  
 #endif  
     
  douser:  
   {  
 #ifdef DEBUG  
     fprintf(stderr,"%08lx: user: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));  
 #endif  
 #ifdef USE_TOS  
     *sp-- = spTOS;  
     spTOS = (Cell)(up+*(Cell*)PFA1(cfa));  
 #else  
     *--sp = (Cell)(up+*(Cell*)PFA1(cfa));  
 #endif  
   }  
 #ifdef NO_IP  
   goto *next_code;  
 #else  
   NEXT_P0;  
   NEXT;  
 #endif  
     
  dodefer:  
   {  
 #ifdef DEBUG  
     fprintf(stderr,"%08lx: defer: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));  
 #endif  
     SUPER_END;  
     EXEC(*(Xt *)PFA1(cfa));  
   }  
   
  dofield:  
   {  
 #ifdef DEBUG  
     fprintf(stderr,"%08lx: field: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));  
 #endif  
     spTOS += *(Cell*)PFA1(cfa);  
   }  
 #ifdef NO_IP  
   goto *next_code;  
 #else  
   NEXT_P0;  
   NEXT;  
 #endif  
   
  dodoes:  
   /* this assumes the following structure:  
      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:  
        
      */  
 #ifdef NO_IP  
   *--rp = next_code;  
   IF_spTOS(spTOS = sp[0]);  
   sp--;  
   spTOS = (Cell)PFA(cfa);  
   goto **(Label *)DOES_CODE1(cfa);  
 #else  
   {  
     /*    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 */  
 #ifdef USE_TOS  
     *sp-- = spTOS;  
     spTOS = (Cell)PFA(cfa);  
 #else  
     *--sp = (Cell)PFA(cfa);  
 #endif  
     SET_IP(DOES_CODE1(cfa));  
     SUPER_END;  
     /*    fprintf(stderr,"TOS = %08lx, IP=%08lx\n", spTOS, IP);*/  
   }  
   NEXT;  
 #endif  
   
 #include "prim.i"  
   after_last: return (Label *)0;    after_last: return (Label *)0;
   /*needed only to get the length of the last primitive */    /*needed only to get the length of the last primitive */
   
     return (Label *)0;
 }  }

Removed from v.1.64  
changed lines
  Added in v.1.92


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