[gforth] / gforth / engine / engine.c  

gforth: gforth/engine/engine.c

Diff for /gforth/engine/engine.c between version 1.52 and 1.96

version 1.52, Mon Dec 23 22:14:06 2002 UTC version 1.96, Sun Jan 21 23:22:29 2007 UTC
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Line 1 
 /* Gforth virtual machine (aka inner interpreter)  /* Gforth virtual machine (aka inner interpreter)
   
   Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc.    Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005,2006 Free Software Foundation, Inc.
   
   This file is part of Gforth.    This file is part of Gforth.
   
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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 46 
Line 54 
 #include "fnmatch.h"  #include "fnmatch.h"
 #endif  #endif
 #else  #else
 #include "systypes.h"  /* #include <systypes.h> */
 #endif  #endif
   
 #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */  #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
Line 59 
Line 67 
 #include <dl.h>  #include <dl.h>
 #endif  #endif
   
   #ifdef HAS_FFCALL
   #include <avcall.h>
   #include <callback.h>
   #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
 #endif  #endif
   
 #define IOR(flag)       ((flag)? -512-errno : 0)  #ifndef HAVE_FSEEKO
   #define fseeko fseek
 struct F83Name {  #endif
   struct F83Name *next;  /* the link field for old hands */  
   char          countetc;  
   char          name[0];  
 };  
   
 #define F83NAME_COUNT(np)       ((np)->countetc & 0x1f)  
   
 struct Longname {  
   struct Longname *next;  /* the link field for old hands */  
   Cell          countetc;  
   char          name[0];  
 };  
   
 #define LONGNAME_COUNT(np)      ((np)->countetc & (((~((UCell)0))<<3)>>3))  #ifndef HAVE_FTELLO
   #define ftello ftell
   #endif
   
 #define NULLC '\0'  #define NULLC '\0'
   
Line 91 
Line 98 
   
 #define NEWLINE '\n'  #define NEWLINE '\n'
   
   /* These two flags control whether divisions are checked by software.
      The CHECK_DIVISION_SW is for those cases where the event is a
      division by zero or overflow on the C level, and might be reported
      by hardware; we might check forr that in autoconf and set the
      switch appropriately, but currently don't.  The CHECK_DIVISION flag
      is for the other cases. */
   #ifdef GFORTH_DEBUGGING
   #define CHECK_DIVISION_SW 1
   #define CHECK_DIVISION 1
   #else
   #define CHECK_DIVISION_SW 0
   #define CHECK_DIVISION 0
   #endif
   
 /* conversion on fetch */  /* conversion on fetch */
   
 #define vm_Cell2f(_cell,_x)             ((_x)=(Bool)(_cell))  #define vm_Cell2f(_cell,_x)             ((_x)=(Bool)(_cell))
Line 149 
Line 170 
 #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 158 
Line 182 
 #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 166 
Line 211 
 # define CPU_DEP1 0  # define CPU_DEP1 0
 #endif  #endif
   
 /* instructions containing these must be the last instruction of a  /* instructions containing SUPER_END must be the last instruction of a
    super-instruction (e.g., branches, EXECUTE, and other instructions     super-instruction (e.g., branches, EXECUTE, and other instructions
    ending the basic block). Instructions containing SET_IP get this     ending the basic block). Instructions containing SET_IP get this
    automatically, so you usually don't have to write it.  If you have     automatically, so you usually don't have to write it.  If you have
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Line 225 
 #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; \
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Line 256 
       }        }
 #endif  #endif
   
   #if defined(HAS_FFCALL) || defined(HAS_LIBFFI)
   #define SAVE_REGS IF_fpTOS(fp[0]=fpTOS); gforth_SP=sp; gforth_FP=fp; gforth_RP=rp; gforth_LP=lp;
   #define REST_REGS sp=gforth_SP; fp=gforth_FP; rp=gforth_RP; lp=gforth_LP; IF_fpTOS(fpTOS=fp[0]);
   #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 238 
Line 305 
   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
   register Address up UPREG = UP;  #ifdef HAS_FFCALL
   IF_spTOS(register Cell spTOS TOSREG;)    av_alist alist;
     extern va_alist gforth_clist;
     float frv;
     int irv;
     double drv;
     long long llrv;
     void * prv;
   #endif
   #ifdef HAS_LIBFFI
     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 252 
Line 341 
   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,  #define INST_ADDR(name) ((Label)&&I_##name)
     (Label)&&docon,  #include PRIM_LAB_I
     (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  
 #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
   #define INST_ADDR(name) ((Label)&&J_##name)
   #include PRIM_LAB_I
 #undef INST_ADDR  #undef INST_ADDR
 #define INST_ADDR(name) (Label)&&J_##name      (Label)&&after_last,
 #include "prim_lab.i"      (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
   };    };
 #ifdef CPU_DEP2  #ifdef CPU_DEP2
Line 299 
Line 384 
       xts[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];        xts[i] = symbols[i] = &routines[i];
Line 308 
Line 393 
     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:  #include PRIM_I
   {  
 #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:  
   {  
 #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;
 }  }

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