--- gforth/engine/engine.c	2005/07/31 20:27:41	1.80
+++ gforth/engine/engine.c	2006/10/21 22:13:49	1.91
@@ -1,6 +1,6 @@
 /* Gforth virtual machine (aka inner interpreter)
 
-  Copyright (C) 1995,1996,1997,1998,2000,2003,2004 Free Software Foundation, Inc.
+  Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005 Free Software Foundation, Inc.
 
   This file is part of Gforth.
 
@@ -46,6 +46,7 @@
 #include <unistd.h>
 #include <pwd.h>
 #include <dirent.h>
+#include <wchar.h>
 #include <sys/resource.h>
 #ifdef HAVE_FNMATCH_H
 #include <fnmatch.h>
@@ -71,6 +72,10 @@
 #include <callback.h>
 #endif
 
+#ifdef HAS_LIBFFI
+#include <ffi.h>
+#endif
+
 #ifndef SEEK_SET
 /* should be defined in stdio.h, but some systems don't have it */
 #define SEEK_SET 0
@@ -92,6 +97,8 @@ extern int gforth_memcmp(const char * s1
 #endif
 
 #define NEWLINE	'\n'
+#define CELL_MIN (((Cell)1)<<(sizeof(Cell)*CHAR_BIT-1))
+#define CHECK_DIVISION 1
 
 /* conversion on fetch */
 
@@ -175,6 +182,15 @@ extern int gforth_memcmp(const char * s1
 #ifndef speREG
 #define speREG
 #endif
+#ifndef spfREG
+#define spfREG
+#endif
+#ifndef spgREG
+#define spgREG
+#endif
+#ifndef sphREG
+#define sphREG
+#endif
 #ifndef FTOSREG
 #define FTOSREG
 #endif
@@ -228,33 +244,32 @@ extern int gforth_memcmp(const char * s1
       }
 #endif
 
-#ifdef HAS_FFCALL
-#define SAVE_REGS 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_fpTOS(fpTOS=fp[0]);
+#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)
 /* normal engine */
 #define VARIANT(v)	(v)
 #define JUMP(target)	goto I_noop
-#define LABEL(name) H_##name: I_##name:
+#define LABEL(name) H_##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 gforth_engine gforth_engine2
 #define VARIANT(v)	(v)
 #define JUMP(target)	goto I_noop
 #define LABEL(name) H_##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 gforth_engine gforth_engine3
 #define VARIANT(v)	((v)^0xffffffff)
 #define JUMP(target)	goto K_lit
-#define LABEL(name) H_##name: I_##name:
+#define LABEL(name) H_##name: asm(""); I_##name:
 #else
 #error illegal ENGINE value
 #endif /* ENGINE */
@@ -263,7 +278,7 @@ extern int gforth_memcmp(const char * s1
 #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
    returns array of machine code labels (for use in a loader), if ip==NULL
 */
@@ -284,19 +299,27 @@ Label *engine(Xt *ip0, Cell *sp0, Cell *
 #endif
 #ifdef HAS_FFCALL
   av_alist alist;
-  extern va_alist clist;
+  extern va_alist gforth_clist;
   float frv;
   int irv;
   double drv;
   long long llrv;
   void * prv;
 #endif
-  register Address up UPREG = UP;
+#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 defined(DOUBLY_INDIRECT)
   static Label *symbols;
@@ -358,24 +381,16 @@ Label *engine(Xt *ip0, Cell *sp0, Cell *
     return symbols;
   }
 
-#if STACK_CACHE_DEFAULT>0
+#if !(defined(GFORTH_DEBUGGING) || defined(INDIRECT_THREADED) || defined(DOUBLY_INDIRECT) || defined(VM_PROFILING))
   sp += STACK_CACHE_DEFAULT-1;
-#endif
-
-#if STACK_CACHE_DEFAULT>0
-  spTOS = sp[0];
-#endif
-#if STACK_CACHE_DEFAULT>1
+  /* some of those registers are dead, but its simpler to initialize them all */  spTOS = sp[0];
   spb = sp[-1];
-#endif
-#if STACK_CACHE_DEFAULT>2
   spc = sp[-2];
-#endif
-#if STACK_CACHE_DEFAULT>3
   spd = sp[-3];
-#endif
-#if STACK_CACHE_DEFAULT>4
   spe = sp[-4];
+  spf = sp[-5];
+  spg = sp[-6];
+  sph = sp[-7];
 #endif
 
   IF_fpTOS(fpTOS = fp[0]);