Diff for /gforth/Attic/engine.c between versions 1.2 and 1.6

version 1.2, 1994/04/20 17:12:00 version 1.6, 1994/05/18 17:29:52
Line 13 Line 13
 #include <assert.h>  #include <assert.h>
 #include <stdlib.h>  #include <stdlib.h>
 #include <time.h>  #include <time.h>
   #include <sys/time.h>
 #include "forth.h"  #include "forth.h"
 #include "io.h"  #include "io.h"
   
 extern unlink(char *);  #ifndef unlink
 extern ftruncate(int, int);          extern unlink(char *);
   #endif
   #ifndef ftruncate
           extern ftruncate(int, int);
   #endif
   
 typedef union {  typedef union {
   struct {    struct {
Line 45  typedef struct F83Name { Line 50  typedef struct F83Name {
   
 /* NEXT and NEXT1 are split into several parts to help scheduling */  /* NEXT and NEXT1 are split into several parts to help scheduling */
 #ifdef DIRECT_THREADED  #ifdef DIRECT_THREADED
 #define NEXT1_P1   #       define NEXT1_P1 
 #define NEXT1_P2 ({goto *cfa;})  #       define NEXT1_P2 ({goto *cfa;})
 #else  #       define DEF_CA
 #define NEXT1_P1 ({ca = *cfa;})  #else
 #define NEXT1_P2 ({goto *ca;})  #       define NEXT1_P1 ({ca = *cfa;})
   #       define NEXT1_P2 ({goto *ca;})
   #       define DEF_CA   Label ca;
 #endif  #endif
 #define NEXT_P1 ({cfa = *ip++; NEXT1_P1;})  #define NEXT_P1 ({cfa = *ip++; NEXT1_P1;})
   
 #define NEXT1 ({NEXT1_P1; NEXT1_P2;})  #define NEXT1 ({DEF_CA NEXT1_P1; NEXT1_P2;})
 #define NEXT ({NEXT_P1; NEXT1_P2;})  #define NEXT ({DEF_CA NEXT_P1; NEXT1_P2;})
   
 #ifdef USE_TOS  #ifdef USE_TOS
 #define IF_TOS(x) x  #define IF_TOS(x) x
Line 70  typedef struct F83Name { Line 77  typedef struct F83Name {
 #define FTOS (fp[0])  #define FTOS (fp[0])
 #endif  #endif
   
 #define DODOES  (symbols[3])  
   
 int emitcounter;  int emitcounter;
 #define NULLC '\0'  #define NULLC '\0'
   
 #define cstr(to, from, size)\  #define cstr(to,from,size)\
         {       memcpy(to, from, size);\          {       memcpy(to,from,size);\
                 to[size]=NULLC;}                  to[size]=NULLC;}
 #define NEWLINE '\n'  #define NEWLINE '\n'
   
 static char* fileattr[6]={"r","rb","r+","r+b","w+","w+b"};  static char* fileattr[6]={"r","rb","r+","r+b","w+","w+b"};
   
 Label *engine(Xt *ip, Cell *sp, Cell *rp, Float *fp)  #if ~defined(select) && defined(DOS)
   /* select replacement for DOS computers for ms only */
   void select(int n, int a, int b, int c, struct timeval * timeout)
   {
      struct timeval time1;
      struct timeval time2;
      struct timezone zone1;
   
      gettimeofday(&time1,&zone1);
      time1.tv_sec += timeout->tv_sec;
      time1.tv_usec += timeout->tv_usec;
      while(time1.tv_usec >= 1000000)
        {
           time1.tv_usec -= 1000000;
           time1.tv_sec++;
        }
      do
        {
           gettimeofday(&time2,&zone1);
        }
      while(time2.tv_usec < time1.tv_usec || time2.tv_sec < time1.tv_sec);
   }
   #endif
   
   Label *engine(Xt *ip, Cell *sp, Cell *rp, Float *fp, Address lp)
 /* 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
    This is very preliminary, as the bootstrap architecture is not yet decided  
 */  */
 {  {
   Xt cfa;    Xt cfa;
   Address lp=NULL;    Address up=NULL;
   static Label symbols[]= {    static Label symbols[]= {
     &&docol,      &&docol,
     &&docon,      &&docon,
     &&dovar,      &&dovar,
       &&douser,
     &&dodoes,      &&dodoes,
       &&dodoes,  /* dummy for does handler address */
 #include "prim_labels.i"  #include "prim_labels.i"
   };    };
 #ifndef DIRECT_THREADED  
   Label ca;  
 #endif  
   IF_TOS(register Cell TOS;)    IF_TOS(register Cell TOS;)
   IF_FTOS(Float FTOS;)    IF_FTOS(Float FTOS;)
 #ifdef CPU_DEP  #ifdef CPU_DEP
Line 116  Label *engine(Xt *ip, Cell *sp, Cell *rp Line 143  Label *engine(Xt *ip, Cell *sp, Cell *rp
       
  docol:   docol:
 #ifdef DEBUG  #ifdef DEBUG
   printf("col: %x\n",(Cell)PFA1(cfa));    printf("%08x: col: %08x\n",(Cell)ip,(Cell)PFA1(cfa));
 #endif  #endif
 #ifdef undefined  #ifdef undefined
   /* this is the simple version */    /* this is the simple version */
Line 129  Label *engine(Xt *ip, Cell *sp, Cell *rp Line 156  Label *engine(Xt *ip, Cell *sp, Cell *rp
      problems with code fields employing calls and delay slots       problems with code fields employing calls and delay slots
   */    */
   {    {
       DEF_CA
     Xt *current_ip = (Xt *)PFA1(cfa);      Xt *current_ip = (Xt *)PFA1(cfa);
     cfa = *current_ip;      cfa = *current_ip;
     NEXT1_P1;      NEXT1_P1;
     *--rp = (Cell)ip;      *--rp = (Cell)ip;
     ip = current_ip+1;      ip = current_ip+1;
       NEXT1_P2;
   }    }
   NEXT1_P2;  
       
  docon:   docon:
 #ifdef DEBUG  #ifdef DEBUG
   printf("con: %x\n",*(Cell*)PFA1(cfa));    printf("%08x: con: %08x\n",(Cell)ip,*(Cell*)PFA1(cfa));
 #endif  #endif
 #ifdef USE_TOS  #ifdef USE_TOS
   *sp-- = TOS;    *sp-- = TOS;
Line 151  Label *engine(Xt *ip, Cell *sp, Cell *rp Line 179  Label *engine(Xt *ip, Cell *sp, Cell *rp
       
  dovar:   dovar:
 #ifdef DEBUG  #ifdef DEBUG
   printf("var: %x\n",(Cell)PFA1(cfa));    printf("%08x: var: %08x\n",(Cell)ip,(Cell)PFA1(cfa));
 #endif  #endif
 #ifdef USE_TOS  #ifdef USE_TOS
   *sp-- = TOS;    *sp-- = TOS;
Line 163  Label *engine(Xt *ip, Cell *sp, Cell *rp Line 191  Label *engine(Xt *ip, Cell *sp, Cell *rp
       
   /* !! user? */    /* !! user? */
       
    douser:
   #ifdef DEBUG
     printf("%08x: user: %08x\n",(Cell)ip,(Cell)PFA1(cfa));
   #endif
   #ifdef USE_TOS
     *sp-- = TOS;
     TOS = (Cell)(up+*(Cell*)PFA1(cfa));
   #else
     *--sp = (Cell)(up+*(Cell*)PFA1(cfa));
   #endif
     NEXT;
     
  dodoes:   dodoes:
   /* this assumes the following structure:    /* this assumes the following structure:
      defining-word:       defining-word:
Line 182  Label *engine(Xt *ip, Cell *sp, Cell *rp Line 222  Label *engine(Xt *ip, Cell *sp, Cell *rp
             
      */       */
 #ifdef DEBUG  #ifdef DEBUG
   printf("does: %x\n",(Cell)PFA(cfa));    printf("%08x/%08x: does: %08x\n",(Cell)ip,(Cell)cfa,*(Cell)PFA(cfa));
     fflush(stdout);
 #endif  #endif
   *--rp = (Cell)ip;    *--rp = (Cell)ip;
   /* PFA1 might collide with DOES_CODE1 here, so we use PFA */    /* PFA1 might collide with DOES_CODE1 here, so we use PFA */

Removed from v.1.2  
changed lines
  Added in v.1.6


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