--- gforth/engine/engine.c	1998/04/16 15:34:41	1.3
+++ gforth/engine/engine.c	2002/01/20 19:04:11	1.39
@@ -1,6 +1,6 @@
 /* Gforth virtual machine (aka inner interpreter)
 
-  Copyright (C) 1995 Free Software Foundation, Inc.
+  Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc.
 
   This file is part of Gforth.
 
@@ -16,31 +16,47 @@
 
   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.
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 */
 
+undefine(`symbols')
+
 #include "config.h"
+#include "forth.h"
 #include <ctype.h>
 #include <stdio.h>
 #include <string.h>
 #include <math.h>
+#include <assert.h>
+#include <stdlib.h>
+#include <errno.h>
+#include "io.h"
+#include "threaded.h"
+#ifndef STANDALONE
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
-#include <assert.h>
-#include <stdlib.h>
 #include <time.h>
 #include <sys/time.h>
 #include <unistd.h>
-#include <errno.h>
 #include <pwd.h>
-#include "forth.h"
-#include "io.h"
-#include "threaded.h"
+#include <dirent.h>
+#include <sys/resource.h>
+#ifdef HAVE_FNMATCH_H
+#include <fnmatch.h>
+#else
+#include "fnmatch.h"
+#endif
+#else
+#include "systypes.h"
+#endif
 
 #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
 #include <dlfcn.h>
 #endif
+#if defined(_WIN32)
+#include <windows.h>
+#endif
 #ifdef hpux
 #include <dl.h>
 #endif
@@ -52,16 +68,21 @@
 
 #define IOR(flag)	((flag)? -512-errno : 0)
 
-typedef struct F83Name {
-  struct F83Name	*next;  /* the link field for old hands */
-  char			countetc;
-  Char			name[0];
-} F83Name;
+struct F83Name {
+  struct F83Name *next;  /* the link field for old hands */
+  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)
+
+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))
 
 Cell *SP;
 Float *FP;
@@ -73,6 +94,12 @@ int emitcounter;
 #endif
 #define NULLC '\0'
 
+#ifdef MEMCMP_AS_SUBROUTINE
+extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
+#define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
+#endif
+
+#ifdef HAS_FILE
 char *cstr(Char *from, UCell size, int clear)
 /* 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 */
@@ -124,6 +151,8 @@ char *tilde_cstr(Char *from, UCell size,
     UCell i;
     for (i=1; i<size && from[i]!='/'; i++)
       ;
+    if (i==2 && from[1]=='+') /* deal with "~+", i.e., the wd */
+      return cstr(from+3, size<3?0:size-3,clear);
     {
       char user[i];
       memcpy(user,from+1,i-1);
@@ -146,7 +175,20 @@ char *tilde_cstr(Char *from, UCell size,
     return cstr(path,s1_len+s2_len,clear);
   }
 }
-   
+#endif
+
+DCell timeval2us(struct timeval *tvp)
+{
+#ifndef BUGGY_LONG_LONG
+  return (tvp->tv_sec*(DCell)1000000)+tvp->tv_usec;
+#else
+  DCell d2;
+  DCell d1=mmul(tvp->tv_sec,1000000);
+  d2.lo = d1.lo+tvp->tv_usec;
+  d2.hi = d1.hi + (d2.lo<d1.lo);
+  return d2;
+#endif
+}
 
 #define NEWLINE	'\n'
 
@@ -154,7 +196,9 @@ char *tilde_cstr(Char *from, UCell size,
 #define rint(x)	floor((x)+0.5)
 #endif
 
-static char* fileattr[6]={"r","rb","r+","r+b","w","wb"};
+#ifdef HAS_FILE
+static char* fileattr[6]={"rb","rb","r+b","r+b","wb","wb"};
+static char* pfileattr[6]={"r","r","r+","r+","w","w"};
 
 #ifndef O_BINARY
 #define O_BINARY 0
@@ -164,9 +208,46 @@ static char* fileattr[6]={"r","rb","r+",
 #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 };
+  O_RDONLY|O_BINARY, O_RDONLY|O_BINARY,
+  O_RDWR  |O_BINARY, O_RDWR  |O_BINARY,
+  O_WRONLY|O_BINARY, O_WRONLY|O_BINARY };
+#endif
+
+/* conversion on fetch */
+
+#define vm_Cell2f(x)		((Bool)(x))
+#define vm_Cell2c(x)		((Char)(x))
+#define vm_Cell2n(x)		((Cell)x)
+#define vm_Cell2w(x)		((Cell)x)
+#define vm_Cell2u(x)		((UCell)(x))
+#define vm_Cell2a_(x)		((Cell *)(x))
+#define vm_Cell2c_(x)		((Char *)(x))
+#define vm_Cell2f_(x)		((Float *)(x))
+#define vm_Cell2df_(x)		((DFloat *)(x))
+#define vm_Cell2sf_(x)		((SFloat *)(x))
+#define vm_Cell2xt(x)		((Xt)(x))
+#define vm_Cell2f83name(x)	((struct F83Name *)(x))
+#define vm_Cell2longname(x)	((struct Longname *)(x))
+#define vm_Float2r(x)	(x)
+
+/* conversion on store */
+
+#define vm_f2Cell(x)		((Cell)(x))
+#define vm_c2Cell(x)		((Cell)(x))
+#define vm_n2Cell(x)		((Cell)(x))
+#define vm_w2Cell(x)		((Cell)(x))
+#define vm_u2Cell(x)		((Cell)(x))
+#define vm_a_2Cell(x)		((Cell)(x))
+#define vm_c_2Cell(x)		((Cell)(x))
+#define vm_f_2Cell(x)		((Cell)(x))
+#define vm_df_2Cell(x)		((Cell)(x))
+#define vm_sf_2Cell(x)		((Cell)(x))
+#define vm_xt2Cell(x)		((Cell)(x))
+#define vm_f83name2Cell(x)	((Cell)(x))
+#define vm_longname2Cell(x)	((Cell)(x))
+#define vm_r2Float(x)	(x)
+
+#define vm_Cell2Cell(x)		(x)
 
 /* if machine.h has not defined explicit registers, define them as implicit */
 #ifndef IPREG
@@ -201,53 +282,113 @@ static int ufileattr[6]= {
 # 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
+/* instructions containing these must be the last instruction of a
+   super-instruction (e.g., branches, EXECUTE, and other instructions
+   ending the basic block). Instructions containing SET_IP get this
+   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
-#define DOCFA	Xt cfa; GETCFA(cfa)
+#define SUPER_END
+#endif
+#define SUPER_CONTINUE
+
+#ifdef GFORTH_DEBUGGING
+/* define some VM registers as global variables, so they survive exceptions;
+   global register variables are not up to the task (according to the 
+   GNU C manual) */
+Xt *ip;
+Cell *rp;
+#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
 
-Label *engine(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
+Xt *primtable(Label symbols[], Cell size)
+     /* used in primitive primtable for peephole optimization */
+{
+#ifdef DIRECT_THREADED
+  return symbols;
+#else /* !defined(DIRECT_THREADED) */
+  Xt *xts = (Xt *)malloc(size*sizeof(Xt));
+  Cell i;
+
+  for (i=0; i<size; i++)
+    xts[i] = &symbols[i];
+  return xts;
+#endif /* !defined(DIRECT_THREADED) */
+}
+
+
+define(enginerest,
+`(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
 /* executes code at ip, if ip!=NULL
    returns array of machine code labels (for use in a loader), if ip==NULL
 */
 {
-  register Xt *ip IPREG = ip0;
+#ifndef GFORTH_DEBUGGING
+  register Xt *ip IPREG;
+  register Cell *rp RPREG;
+#endif
   register Cell *sp SPREG = sp0;
-  register Cell *rp RPREG = rp0;
   register Float *fp FPREG = fp0;
   register Address lp LPREG = lp0;
-#ifdef CFA_NEXT
   register Xt cfa CFAREG;
+#ifdef MORE_VARS
+  MORE_VARS
 #endif
   register Address up UPREG = UP;
-  IF_TOS(register Cell TOS TOSREG;)
-  IF_FTOS(register Float FTOS FTOSREG;)
+  IF_spTOS(register Cell spTOS TOSREG;)
+  IF_fpTOS(register Float fpTOS FTOSREG;)
 #if defined(DOUBLY_INDIRECT)
   static Label *symbols;
   static void *routines[]= {
+#define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
 #else /* !defined(DOUBLY_INDIRECT) */
   static Label symbols[]= {
+#define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
 #endif /* !defined(DOUBLY_INDIRECT) */
-    &&docol,
-    &&docon,
-    &&dovar,
-    &&douser,
-    &&dodefer,
-    &&dofield,
-    &&dodoes,
+    (Label)&&docol,
+    (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 */
+       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
+    (Label)&&after_last,
+    (Label)0,
+#ifdef IN_ENGINE2
+#define INST_ADDR(name) (Label)&&J_##name
 #include "prim_lab.i"
-    0
+#undef INST_ADDR
+#endif
   };
 #ifdef CPU_DEP2
   CPU_DEP2
 #endif
 
+  ip = ip0;
+  rp = rp0;
 #ifdef DEBUG
   fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
           (unsigned)ip,(unsigned)sp,(unsigned)rp,
@@ -256,73 +397,76 @@ Label *engine(Xt *ip0, Cell *sp0, Cell *
 
   if (ip == NULL) {
 #if defined(DOUBLY_INDIRECT)
-#define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
-#define CODE_OFFSET (22*sizeof(Cell))
+#define CODE_OFFSET (26*sizeof(Cell))
+#define XT_OFFSET (22*sizeof(Cell))
     int i;
     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);
+    xts = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+XT_OFFSET)+xt_offset);
     for (i=0; i<DOESJUMP+1; i++)
-      symbols[i] = (Label)routines[i];
+      xts[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);
+      }
+      xts[i] = symbols[i] = &routines[i];
     }
-    symbols[i] = &routines[i];
-  }
 #endif /* defined(DOUBLY_INDIRECT) */
-  return symbols;
-}
+    return symbols;
+  }
 
-  IF_TOS(TOS = sp[0]);
-  IF_FTOS(FTOS = fp[0]);
+  IF_spTOS(spTOS = sp[0]);
+  IF_fpTOS(fpTOS = fp[0]);
 /*  prep_terminal(); */
-  NEXT_P0;
+  SET_IP(ip);
+  SUPER_END; /* count the first block, too */
   NEXT;
 
+
 #ifdef CPU_DEP3
   CPU_DEP3
 #endif
   
  docol:
   {
-    DOCFA;
 #ifdef DEBUG
-    fprintf(stderr,"%08lx: col: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
+    {
+      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;
-    ip = (Xt *)PFA1(cfa);
-    NEXT_P0;
+    SET_IP((Xt *)PFA1(cfa));
+    SUPER_END;
     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
-       */
+    /* this one is important, so we help the compiler optimizing */
     {
       DEF_CA
-      Xt *current_ip = (Xt *)PFA1(cfa);
-      cfa = *current_ip;
-      NEXT1_P1;
-      *--rp = (Cell)ip;
-      ip = current_ip+1;
-      NEXT1_P2;
+      rp[-1] = (Cell)ip;
+      SET_IP((Xt *)PFA1(cfa));
+      SUPER_END;
+      NEXT_P1;
+      rp--;
+      NEXT_P2;
     }
 #endif
   }
 
  docon:
   {
-    DOCFA;
 #ifdef DEBUG
     fprintf(stderr,"%08lx: con: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
 #endif
 #ifdef USE_TOS
-    *sp-- = TOS;
-    TOS = *(Cell *)PFA1(cfa);
+    *sp-- = spTOS;
+    spTOS = *(Cell *)PFA1(cfa);
 #else
     *--sp = *(Cell *)PFA1(cfa);
 #endif
@@ -332,13 +476,12 @@ Label *engine(Xt *ip0, Cell *sp0, Cell *
   
  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);
+    *sp-- = spTOS;
+    spTOS = (Cell)PFA1(cfa);
 #else
     *--sp = (Cell)PFA1(cfa);
 #endif
@@ -348,13 +491,12 @@ Label *engine(Xt *ip0, Cell *sp0, Cell *
   
  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));
+    *sp-- = spTOS;
+    spTOS = (Cell)(up+*(Cell*)PFA1(cfa));
 #else
     *--sp = (Cell)(up+*(Cell*)PFA1(cfa));
 #endif
@@ -364,20 +506,19 @@ Label *engine(Xt *ip0, Cell *sp0, Cell *
   
  dodefer:
   {
-    DOCFA;
 #ifdef DEBUG
     fprintf(stderr,"%08lx: defer: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
 #endif
+    SUPER_END;
     EXEC(*(Xt *)PFA1(cfa));
   }
 
  dofield:
   {
-    DOCFA;
 #ifdef DEBUG
     fprintf(stderr,"%08lx: field: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
 #endif
-    TOS += *(Cell*)PFA1(cfa); 
+    spTOS += *(Cell*)PFA1(cfa);
   }
   NEXT_P0;
   NEXT;
@@ -401,8 +542,6 @@ Label *engine(Xt *ip0, Cell *sp0, Cell *
      
      */
   {
-    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));
@@ -410,17 +549,32 @@ Label *engine(Xt *ip0, Cell *sp0, Cell *
 #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);
+    *sp-- = spTOS;
+    spTOS = (Cell)PFA(cfa);
 #else
     *--sp = (Cell)PFA(cfa);
 #endif
-    /*    fprintf(stderr,"TOS = %08lx, IP=%08lx\n", TOS, IP);*/
+    SET_IP(DOES_CODE1(cfa));
+    SUPER_END;
+    /*    fprintf(stderr,"TOS = %08lx, IP=%08lx\n", spTOS, IP);*/
   }
-  NEXT_P0;
   NEXT;
 
+#ifndef IN_ENGINE2
+#define LABEL(name) I_##name
+#else
+#define LABEL(name) J_##name: asm(".skip 16"); I_##name
+#endif
 #include "prim.i"
-}
+#undef LABEL
+  after_last: return (Label *)0;
+  /*needed only to get the length of the last primitive */
+}'
+)
+
+Label *engine enginerest
+
+#define IN_ENGINE2
+Label *engine2 enginerest
+