Diff for /gforth/engine/threaded.h between versions 1.1 and 1.18

version 1.1, 1997/05/21 20:40:12 version 1.18, 2002/12/28 17:18:27
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 /* This file defines a number of threading schemes.  /* This file defines a number of threading schemes.
   
   Copyright (C) 1995, 1996 Free Software Foundation, Inc.    Copyright (C) 1995, 1996,1997,1999 Free Software Foundation, Inc.
   
   This file is part of Gforth.    This file is part of Gforth.
   
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   You should have received a copy of the GNU General Public License    You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software    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.
   
   
   This files defines macros for threading. Many sets of macros are    This files defines macros for threading. Many sets of macros are
Line 91 Line 91
   
 */  */
   
 #ifndef GETCFA  
 #  define CFA_NEXT  
 #endif  
   
 #ifdef DOUBLY_INDIRECT  #ifdef DOUBLY_INDIRECT
 #  define NEXT_P0       ({cfa=*ip;})  #  define NEXT_P0       ({cfa=*ip;})
 #  define IP            (ip)  #  define IP            (ip)
   #  define SET_IP(p)     ({ip=(p); NEXT_P0;})
 #  define NEXT_INST     (cfa)  #  define NEXT_INST     (cfa)
 #  define INC_IP(const_inc)     ({cfa=IP[const_inc]; ip+=(const_inc);})  #  define INC_IP(const_inc)     ({cfa=IP[const_inc]; ip+=(const_inc);})
 #  define DEF_CA        Label ca;  #  define DEF_CA        Label ca;
 #  define NEXT_P1       ({ip++; ca=**cfa;})  #  define NEXT_P1       ({\
     if ((cfa<=vm_prims+DOESJUMP || cfa>=vm_prims+npriminfos)) \
       fprintf(stderr,"NEXT encountered prim %p at ip=%p [%p .. %p]\n", cfa, ip, vm_prims+DOESJUMP, vm_prims+npriminfos); \
     ip++; ca=**cfa;})
 #  define NEXT_P2       ({goto *ca;})  #  define NEXT_P2       ({goto *ca;})
 #  define EXEC(XT)      ({DEF_CA cfa=(XT); ca=**cfa; goto *ca;})  #  define EXEC(XT)      ({DEF_CA cfa=(XT);\
 #  define NEXT1_P1 ({ca = **cfa;})    if ((cfa>vm_prims+DOESJUMP && cfa<vm_prims+npriminfos)) \
 #  define NEXT1_P2 ({goto *ca;})      fprintf(stderr,"EXEC encountered xt %p at ip=%p, vm_prims=%p, xts=%p\n", cfa, ip, vm_prims, xts); \
    ca=**cfa; goto *ca;})
 #else /* !defined(DOUBLY_INDIRECT) */  
   #elif defined(NO_IP)
 #if defined(DIRECT_THREADED) && defined(AUTO_INCREMENT)\  
     && defined(LONG_LATENCY) && defined(CFA_NEXT)  #define NEXT_P0
 #warning scheme 1  #define SET_IP(target)  assert(0)
   #define INC_IP(n)       ((void)0)
   #define DEF_CA
   #define NEXT_P1
   #define NEXT_P2         ({goto *next_code;})
   /* set next_code to the return address before performing EXEC */
   #define EXEC(XT)        ({cfa=(XT); goto **cfa;})
   
   #else  /* !defined(DOUBLY_INDIRECT) && !defined(NO_IP) */
   
   #if defined(DIRECT_THREADED)
   
   /* This lets the compiler know that cfa is dead before; we place it at
      "goto *"s that perform direct threaded dispatch (i.e., not EXECUTE
      etc.), and thus do not reach doers, which would use cfa; the only
      way to a doer is through EXECUTE etc., which set the cfa
      themselves.
   
      Some of these direct threaded schemes use "cfa" to hold the code
      address in normal direct threaded code.  Of course we cannot use
      KILLS there.
   
      KILLS works by having an empty asm instruction, and claiming to the
      compiler that it writes to cfa.
   
      KILLS is optional.  You can write
   
   #define KILLS
   
      and lose just a little performance.
   */
   #define KILLS asm("":"=X"(cfa));
   
   #if THREADING_SCHEME==1
   #warning direct threading scheme 1: autoinc, long latency, cfa live
 #  define NEXT_P0       ({cfa=*ip++;})  #  define NEXT_P0       ({cfa=*ip++;})
 #  define IP            (ip-1)  #  define IP            (ip-1)
   #  define SET_IP(p)     ({ip=(p); NEXT_P0;})
 #  define NEXT_INST     (cfa)  #  define NEXT_INST     (cfa)
 #  define INC_IP(const_inc)     ({cfa=IP[const_inc]; ip+=(const_inc);})  #  define INC_IP(const_inc)     ({cfa=IP[const_inc]; ip+=(const_inc);})
 #  define DEF_CA  #  define DEF_CA
 #  define NEXT_P1  #  define NEXT_P1
 #  define NEXT_P2       ({goto *cfa;})  #  define NEXT_P2       ({goto *cfa;})
 #  define EXEC(XT)      ({cfa=(XT); goto *cfa;})  #  define EXEC(XT)      ({cfa=(XT); goto **cfa;})
 #endif  #endif
   
 #if defined(DIRECT_THREADED) && defined(AUTO_INCREMENT)\  #if THREADING_SCHEME==2
     && defined(LONG_LATENCY) && !defined(CFA_NEXT)  #warning direct threading scheme 2: autoinc, long latency, cfa dead
 #warning scheme 2  
 #  define NEXT_P0       (ip++)  #  define NEXT_P0       (ip++)
 #  define IP            (ip-1)  #  define IP            (ip-1)
   #  define SET_IP(p)     ({ip=(p); NEXT_P0;})
 #  define NEXT_INST     (*(ip-1))  #  define NEXT_INST     (*(ip-1))
 #  define INC_IP(const_inc)     ({ ip+=(const_inc);})  #  define INC_IP(const_inc)     ({ ip+=(const_inc);})
 #  define DEF_CA  #  define DEF_CA
 #  define NEXT_P1  #  define NEXT_P1
 #  define NEXT_P2       ({goto **(ip-1);})  #  define NEXT_P2       ({KILLS goto **(ip-1);})
 #  define EXEC(XT)      ({goto *(XT);})  #  define EXEC(XT)      ({cfa=(XT); goto **cfa;})
 #endif  #endif
   
   
 #if defined(DIRECT_THREADED) && defined(AUTO_INCREMENT)\  #if THREADING_SCHEME==3
     && !defined(LONG_LATENCY) && defined(CFA_NEXT)  #warning direct threading scheme 3: autoinc, low latency, cfa live
 #warning scheme 3  
 #  define NEXT_P0  #  define NEXT_P0
 #  define IP            (ip)  #  define IP            (ip)
   #  define SET_IP(p)     ({ip=(p); NEXT_P0;})
 #  define NEXT_INST     (*ip)  #  define NEXT_INST     (*ip)
 #  define INC_IP(const_inc)     ({ip+=(const_inc);})  #  define INC_IP(const_inc)     ({ip+=(const_inc);})
 #  define DEF_CA  #  define DEF_CA
 #  define NEXT_P1       ({cfa=*ip++;})  #  define NEXT_P1       ({cfa=*ip++;})
 #  define NEXT_P2       ({goto *cfa;})  #  define NEXT_P2       ({goto *cfa;})
 #  define EXEC(XT)      ({cfa=(XT); goto *cfa;})  #  define EXEC(XT)      ({cfa=(XT); goto **cfa;})
 #endif  #endif
   
 #if defined(DIRECT_THREADED) && defined(AUTO_INCREMENT)\  #if THREADING_SCHEME==4
     && !defined(LONG_LATENCY) && !defined(CFA_NEXT)  #warning direct threading scheme 4: autoinc, low latency, cfa dead
 #warning scheme 4  
 #  define NEXT_P0  #  define NEXT_P0
 #  define IP            (ip)  #  define IP            (ip)
   #  define SET_IP(p)     ({ip=(p); NEXT_P0;})
 #  define NEXT_INST     (*ip)  #  define NEXT_INST     (*ip)
 #  define INC_IP(const_inc)     ({ ip+=(const_inc);})  #  define INC_IP(const_inc)     ({ ip+=(const_inc);})
 #  define DEF_CA  #  define DEF_CA
 #  define NEXT_P1  #  define NEXT_P1
 #  define NEXT_P2       ({goto **(ip++);})  #  define NEXT_P2       ({KILLS goto **(ip++);})
 #  define EXEC(XT)      ({goto *(XT);})  #  define EXEC(XT)      ({cfa=(XT); goto **cfa;})
 #endif  #endif
   
 /* without autoincrement */  #if THREADING_SCHEME==5
   #warning direct threading scheme 5: long latency, cfa live
 #if defined(DIRECT_THREADED) && !defined(AUTO_INCREMENT)\  
     && defined(LONG_LATENCY) && defined(CFA_NEXT)  
 #warning scheme 5  
 #  define NEXT_P0       ({cfa=*ip;})  #  define NEXT_P0       ({cfa=*ip;})
 #  define IP            (ip)  #  define IP            (ip)
   #  define SET_IP(p)     ({ip=(p); NEXT_P0;})
 #  define NEXT_INST     (cfa)  #  define NEXT_INST     (cfa)
 #  define INC_IP(const_inc)     ({cfa=IP[const_inc]; ip+=(const_inc);})  #  define INC_IP(const_inc)     ({cfa=IP[const_inc]; ip+=(const_inc);})
 #  define DEF_CA  #  define DEF_CA
 #  define NEXT_P1       (ip++)  #  define NEXT_P1       (ip++)
 #  define NEXT_P2       ({goto *cfa;})  #  define NEXT_P2       ({goto *cfa;})
 #  define EXEC(XT)      ({cfa=(XT); goto *cfa;})  #  define EXEC(XT)      ({cfa=(XT); goto **cfa;})
 #endif  #endif
   
 #if defined(DIRECT_THREADED) && !defined(AUTO_INCREMENT)\  #if THREADING_SCHEME==6
     && defined(LONG_LATENCY) && !defined(CFA_NEXT)  #warning direct threading scheme 6: long latency, cfa dead
 #warning scheme 6  
 #  define NEXT_P0  #  define NEXT_P0
 #  define IP            (ip)  #  define IP            (ip)
   #  define SET_IP(p)     ({ip=(p); NEXT_P0;})
 #  define NEXT_INST     (*ip)  #  define NEXT_INST     (*ip)
 #  define INC_IP(const_inc)     ({ip+=(const_inc);})  #  define INC_IP(const_inc)     ({ip+=(const_inc);})
 #  define DEF_CA  #  define DEF_CA
 #  define NEXT_P1       (ip++)  #  define NEXT_P1       (ip++)
 #  define NEXT_P2       ({goto **(ip-1);})  #  define NEXT_P2       ({KILLS goto **(ip-1);})
 #  define EXEC(XT)      ({goto *(XT);})  #  define EXEC(XT)      ({cfa=(XT); goto **cfa;})
 #endif  #endif
   
   
 #if defined(DIRECT_THREADED) && !defined(AUTO_INCREMENT)\  #if THREADING_SCHEME==7
     && !defined(LONG_LATENCY) && defined(CFA_NEXT)  #warning direct threading scheme 7: low latency, cfa live
 #warning scheme 7  
 #  define NEXT_P0  #  define NEXT_P0
 #  define IP            (ip)  #  define IP            (ip)
   #  define SET_IP(p)     ({ip=(p); NEXT_P0;})
 #  define NEXT_INST     (*ip)  #  define NEXT_INST     (*ip)
 #  define INC_IP(const_inc)     ({ip+=(const_inc);})  #  define INC_IP(const_inc)     ({ip+=(const_inc);})
 #  define DEF_CA  #  define DEF_CA
 #  define NEXT_P1       ({cfa=*ip++;})  #  define NEXT_P1       ({cfa=*ip++;})
 #  define NEXT_P2       ({goto *cfa;})  #  define NEXT_P2       ({goto *cfa;})
 #  define EXEC(XT)      ({cfa=(XT); goto *cfa;})  #  define EXEC(XT)      ({cfa=(XT); goto **cfa;})
 #endif  #endif
   
 #if defined(DIRECT_THREADED) && !defined(AUTO_INCREMENT)\  #if THREADING_SCHEME==8
     && !defined(LONG_LATENCY) && !defined(CFA_NEXT)  #warning direct threading scheme 8: cfa dead, i386 hack
 #warning scheme 8  
 #  define NEXT_P0  #  define NEXT_P0
 #  define IP            (ip)  #  define IP            (ip)
   #  define SET_IP(p)     ({ip=(p); NEXT_P0;})
 #  define NEXT_INST     (*IP)  #  define NEXT_INST     (*IP)
 #  define INC_IP(const_inc)     ({ ip+=(const_inc);})  #  define INC_IP(const_inc)     ({ ip+=(const_inc);})
 #  define DEF_CA  #  define DEF_CA
 #  define NEXT_P1       (ip++)  #  define NEXT_P1       (ip++)
 #  define NEXT_P2       ({goto **(ip-1);})  #  define NEXT_P2       ({KILLS goto **(ip-1);})
 #  define EXEC(XT)      ({goto *(XT);})  #  define EXEC(XT)      ({cfa=(XT); goto **cfa;})
 #endif  #endif
   
 /* common settings for direct THREADED */  #if THREADING_SCHEME==9
   #warning direct threading scheme 9: Power/PPC hack, long latency
   /* Power uses a prepare-to-branch instruction, and the latency between
      this inst and the branch is 5 cycles on a PPC604; so we utilize this
      to do some prefetching in between */
   #  define NEXT_P0
   #  define IP            ip
   #  define SET_IP(p)     ({ip=(p); next_cfa=*ip; NEXT_P0;})
   #  define NEXT_INST     (next_cfa)
   #  define INC_IP(const_inc)     ({next_cfa=IP[const_inc]; ip+=(const_inc);})
   #  define DEF_CA        
   #  define NEXT_P1       ({cfa=next_cfa; ip++; next_cfa=*ip;})
   #  define NEXT_P2       ({goto *cfa;})
   #  define EXEC(XT)      ({cfa=(XT); goto **cfa;})
   #  define MORE_VARS     Xt next_cfa;
   #endif
   
   #if THREADING_SCHEME==10
   #warning direct threading scheme 10: plain (no attempt at scheduling)
   #  define NEXT_P0
   #  define IP            (ip)
   #  define SET_IP(p)     ({ip=(p); NEXT_P0;})
   #  define NEXT_INST     (*ip)
   #  define INC_IP(const_inc)     ({ip+=(const_inc);})
   #  define DEF_CA
   #  define NEXT_P1
   #  define NEXT_P2       ({cfa=*ip++; goto *cfa;})
   #  define EXEC(XT)      ({cfa=(XT); goto **cfa;})
   #endif
   
   /* direct threaded */
   #else
 /* indirect THREADED  */  /* indirect THREADED  */
   
 #if !defined(DIRECT_THREADED) && defined(AUTO_INCREMENT)\  #if THREADING_SCHEME==1
     && defined(LONG_LATENCY) && defined(CISC_NEXT)  #warning indirect threading scheme 1: autoinc, long latency, cisc
 #  define NEXT_P0       ({cfa=*ip++;})  #  define NEXT_P0       ({cfa=*ip++;})
 #  define IP            (ip-1)  #  define IP            (ip-1)
   #  define SET_IP(p)     ({ip=(p); NEXT_P0;})
 #  define NEXT_INST     (cfa)  #  define NEXT_INST     (cfa)
 #  define INC_IP(const_inc)     ({cfa=IP[const_inc]; ip+=(const_inc);})  #  define INC_IP(const_inc)     ({cfa=IP[const_inc]; ip+=(const_inc);})
 #  define DEF_CA  #  define DEF_CA
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 #  define EXEC(XT)      ({cfa=(XT); goto **cfa;})  #  define EXEC(XT)      ({cfa=(XT); goto **cfa;})
 #endif  #endif
   
 #if !defined(DIRECT_THREADED) && defined(AUTO_INCREMENT)\  #if THREADING_SCHEME==2
     && defined(LONG_LATENCY) && !defined(CISC_NEXT)  #warning indirect threading scheme 2: autoinc, long latency
 #  define NEXT_P0       ({cfa=*ip++;})  #  define NEXT_P0       ({cfa=*ip++;})
 #  define IP            (ip-1)  #  define IP            (ip-1)
   #  define SET_IP(p)     ({ip=(p); NEXT_P0;})
 #  define NEXT_INST     (cfa)  #  define NEXT_INST     (cfa)
 #  define INC_IP(const_inc)     ({cfa=IP[const_inc]; ip+=(const_inc);})  #  define INC_IP(const_inc)     ({cfa=IP[const_inc]; ip+=(const_inc);})
 #  define DEF_CA        Label ca;  #  define DEF_CA        Label ca;
Line 247 Line 311
 #endif  #endif
   
   
 #if !defined(DIRECT_THREADED) && defined(AUTO_INCREMENT)\  #if THREADING_SCHEME==3
     && !defined(LONG_LATENCY) && defined(CISC_NEXT)  #warning indirect threading scheme 3: autoinc, low latency, cisc
 #  define NEXT_P0  #  define NEXT_P0
 #  define IP            (ip)  #  define IP            (ip)
   #  define SET_IP(p)     ({ip=(p); NEXT_P0;})
 #  define NEXT_INST     (*ip)  #  define NEXT_INST     (*ip)
 #  define INC_IP(const_inc)     ({ip+=(const_inc);})  #  define INC_IP(const_inc)     ({ip+=(const_inc);})
 #  define DEF_CA  #  define DEF_CA
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 #  define EXEC(XT)      ({cfa=(XT); goto **cfa;})  #  define EXEC(XT)      ({cfa=(XT); goto **cfa;})
 #endif  #endif
   
 #if !defined(DIRECT_THREADED) && defined(AUTO_INCREMENT)\  #if THREADING_SCHEME==4
     && !defined(LONG_LATENCY) && !defined(CISC_NEXT)  #warning indirect threading scheme 4: autoinc, low latency
 #  define NEXT_P0       ({cfa=*ip++;})  #  define NEXT_P0       ({cfa=*ip++;})
 #  define IP            (ip-1)  #  define IP            (ip-1)
   #  define SET_IP(p)     ({ip=(p); NEXT_P0;})
 #  define NEXT_INST     (cfa)  #  define NEXT_INST     (cfa)
 #  define INC_IP(const_inc)     ({cfa=IP[const_inc]; ip+=(const_inc);})  #  define INC_IP(const_inc)     ({cfa=IP[const_inc]; ip+=(const_inc);})
 #  define DEF_CA        Label ca;  #  define DEF_CA        Label ca;
Line 272 Line 338
 #endif  #endif
   
   
 /* without autoincrement */  #if THREADING_SCHEME==5
   #warning indirect threading scheme 5: long latency, cisc
 #if !defined(DIRECT_THREADED) && !defined(AUTO_INCREMENT)\  
     && defined(LONG_LATENCY) && defined(CISC_NEXT)  
 #  define NEXT_P0       ({cfa=*ip;})  #  define NEXT_P0       ({cfa=*ip;})
 #  define IP            (ip)  #  define IP            (ip)
   #  define SET_IP(p)     ({ip=(p); NEXT_P0;})
 #  define NEXT_INST     (cfa)  #  define NEXT_INST     (cfa)
 #  define INC_IP(const_inc)     ({cfa=IP[const_inc]; ip+=(const_inc);})  #  define INC_IP(const_inc)     ({cfa=IP[const_inc]; ip+=(const_inc);})
 #  define DEF_CA  #  define DEF_CA
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 #  define EXEC(XT)      ({cfa=(XT); goto **cfa;})  #  define EXEC(XT)      ({cfa=(XT); goto **cfa;})
 #endif  #endif
   
 #if !defined(DIRECT_THREADED) && !defined(AUTO_INCREMENT)\  #if THREADING_SCHEME==6
     && defined(LONG_LATENCY) && !defined(CISC_NEXT)  #warning indirect threading scheme 6: long latency
 #  define NEXT_P0       ({cfa=*ip;})  #  define NEXT_P0       ({cfa=*ip;})
 #  define IP            (ip)  #  define IP            (ip)
   #  define SET_IP(p)     ({ip=(p); NEXT_P0;})
 #  define NEXT_INST     (cfa)  #  define NEXT_INST     (cfa)
 #  define INC_IP(const_inc)     ({cfa=IP[const_inc]; ip+=(const_inc);})  #  define INC_IP(const_inc)     ({cfa=IP[const_inc]; ip+=(const_inc);})
 #  define DEF_CA        Label ca;  #  define DEF_CA        Label ca;
Line 298 Line 364
 #  define EXEC(XT)      ({DEF_CA cfa=(XT); ca=*cfa; goto *ca;})  #  define EXEC(XT)      ({DEF_CA cfa=(XT); ca=*cfa; goto *ca;})
 #endif  #endif
   
   #if THREADING_SCHEME==7
   #warning indirect threading scheme 7: low latency
   #  define NEXT_P0       ({cfa=*ip;})
   #  define IP            (ip)
   #  define SET_IP(p)     ({ip=(p); NEXT_P0;})
   #  define NEXT_INST     (cfa)
   #  define INC_IP(const_inc)     ({cfa=IP[const_inc]; ip+=(const_inc);})
   #  define DEF_CA        Label ca;
   #  define NEXT_P1       ({ip++; ca=*cfa;})
   #  define NEXT_P2       ({goto *ca;})
   #  define EXEC(XT)      ({DEF_CA cfa=(XT); ca=*cfa; goto *ca;})
   #endif
   
 #if !defined(DIRECT_THREADED) && !defined(AUTO_INCREMENT)\  #if THREADING_SCHEME==8
     && !defined(LONG_LATENCY) && defined(CISC_NEXT)  #warning indirect threading scheme 8: low latency,cisc
 #  define NEXT_P0  #  define NEXT_P0
 #  define IP            (ip)  #  define IP            (ip)
   #  define SET_IP(p)     ({ip=(p); NEXT_P0;})
 #  define NEXT_INST     (*ip)  #  define NEXT_INST     (*ip)
 #  define INC_IP(const_inc)     ({ip+=(const_inc);})  #  define INC_IP(const_inc)     ({ip+=(const_inc);})
 #  define DEF_CA  #  define DEF_CA
Line 311 Line 390
 #  define EXEC(XT)      ({cfa=(XT); goto **cfa;})  #  define EXEC(XT)      ({cfa=(XT); goto **cfa;})
 #endif  #endif
   
 #if !defined(DIRECT_THREADED) && !defined(AUTO_INCREMENT)\  /* indirect threaded */
     && !defined(LONG_LATENCY) && !defined(CISC_NEXT)  
 #  define NEXT_P0       ({cfa=*ip;})  
 #  define IP            (ip)  
 #  define NEXT_INST     (cfa)  
 #  define INC_IP(const_inc)     ({cfa=IP[const_inc]; ip+=(const_inc);})  
 #  define DEF_CA        Label ca;  
 #  define NEXT_P1       ({ip++; ca=*cfa;})  
 #  define NEXT_P2       ({goto *ca;})  
 #  define EXEC(XT)      ({DEF_CA cfa=(XT); ca=*cfa; goto *ca;})  
 #endif  #endif
   
 #if defined(CISC_NEXT) && !defined(LONG_LATENCY)  #endif /* !defined(DOUBLY_INDIRECT) && !defined(NO_IP) */
 # define NEXT1_P1  
 # ifdef DIRECT_THREADED  
 #  define NEXT1_P2 ({goto *cfa;})  
 # else  
 #  define NEXT1_P2 ({goto **cfa;})  
 # endif /* DIRECT_THREADED */  
 #else /* !defined(CISC_NEXT) || defined(LONG_LATENCY) */  
 # ifdef DIRECT_THREADED  
 #  define NEXT1_P1  
 #  define NEXT1_P2 ({goto *cfa;})  
 # else /* !DIRECT_THREADED */  
 #  define NEXT1_P1 ({ca = *cfa;})  
 #  define NEXT1_P2 ({goto *ca;})  
 # endif /* !DIRECT_THREADED */  
 #endif /* !defined(CISC_NEXT) || defined(LONG_LATENCY) */  
   
 #endif /* !defined(DOUBLY_INDIRECT) */  
   
 #define NEXT ({DEF_CA NEXT_P1; NEXT_P2;})  #define NEXT ({DEF_CA NEXT_P1; NEXT_P2;})
   #define IPTOS NEXT_INST

Removed from v.1.1  
changed lines
  Added in v.1.18


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