yap-6.3/C/inlines.c

/*************************************************************************
*									 *
*	 YAP Prolog 							 *
*									 *
*	Yap Prolog was developed at NCCUP - Universidade do Porto	 *
*									 *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997	 *
*									 *
**************************************************************************
*									 *
* File:		inlines.c						 *
* Last rev:								 *
* mods:									 *
* comments:	C-version for inline code used in meta-calls	         *
*									 *
*************************************************************************/

#define IN_INLINES_C 1

#include "absmi.h"

STATIC_PROTO(Int    p_atom, (void));
STATIC_PROTO(Int    p_atomic, (void));
STATIC_PROTO(Int    p_integer, (void));
STATIC_PROTO(Int    p_nonvar, (void));
STATIC_PROTO(Int    p_number, (void));
STATIC_PROTO(Int    p_var, (void));
STATIC_PROTO(Int    p_db_ref, (void));
STATIC_PROTO(Int    p_primitive, (void));
STATIC_PROTO(Int    p_compound, (void));
STATIC_PROTO(Int    p_float, (void));
STATIC_PROTO(Int    p_equal, (void));
STATIC_PROTO(Int    p_dif, (void));
STATIC_PROTO(Int    p_eq, (void));
STATIC_PROTO(Int    p_arg, (void));
STATIC_PROTO(Int    p_functor, (void));


static Int 
p_atom(void)
{				/* atom(?)	 */
      BEGD(d0);
      d0 = ARG1;
      deref_head(d0, atom_unk);
    atom_nvar:
      if (IsAtomTerm(d0)) {
	return(TRUE);
      }
      else {
	return(FALSE);
      }

      BEGP(pt0);
      deref_body(d0, pt0, atom_unk, atom_nvar);
      return(FALSE);
      ENDP(pt0);
      ENDD(d0);
}

static Int 
p_atomic(void)
{				/* atomic(?)	 */
      BEGD(d0);
      d0 = ARG1;
      deref_head(d0, atomic_unk);
    atomic_nvar:
      if (IsAtomicTerm(d0)) {
	return(TRUE);
      }
      else {
	return(FALSE);
      }

      BEGP(pt0);
      deref_body(d0, pt0, atomic_unk, atomic_nvar);
      return(FALSE);
      ENDP(pt0);
      ENDD(d0);
}

static Int 
p_integer(void)
{				/* integer(?,?)	 */
      BEGD(d0);
      d0 = ARG1;
      deref_head(d0, integer_unk);
    integer_nvar:
      if (IsIntTerm(d0)) {
	return(TRUE);
      }
      if (IsApplTerm(d0)) {
	Functor f0 = FunctorOfTerm(d0);
	if (IsExtensionFunctor(f0)) {
	  switch ((CELL)f0) {
	  case (CELL)FunctorLongInt:
#ifdef USE_GMP
	  case (CELL)FunctorBigInt:
#endif
	    return(TRUE);
	  default:
	    return(FALSE);
	  }
	}
	return(FALSE);
      } else {
	return(FALSE);
      }

      BEGP(pt0);
      deref_body(d0, pt0, integer_unk, integer_nvar);
      ENDP(pt0);
      return(FALSE);
      ENDD(d0);
}

static Int 
p_number(void)
{				/* number(?)	 */
      BEGD(d0);
      d0 = ARG1;
      deref_head(d0, number_unk);
    number_nvar:
      if (IsIntTerm(d0)) {
	return(TRUE);
      }
      if (IsApplTerm(d0)) {
	Functor f0 = FunctorOfTerm(d0);
	if (IsExtensionFunctor(f0)) {
	  switch ((CELL)f0) {
	  case (CELL)FunctorLongInt:
	  case (CELL)FunctorDouble:
#ifdef USE_GMP
	  case (CELL)FunctorBigInt:
#endif
	    return(TRUE);
	  default:
	    return(FALSE);
	  }
	}
	return(FALSE);
      } else {
	return(FALSE);
      }

      BEGP(pt0);
      deref_body(d0, pt0, number_unk, number_nvar);
      return(FALSE);
      ENDP(pt0);
      ENDD(d0);
}

static Int 
p_db_ref(void)
{				/* db_reference(?,?)	 */
      BEGD(d0);
      d0 = ARG1;
      deref_head(d0, db_ref_unk);
    db_ref_nvar:
      if (IsDBRefTerm(d0)) {
	return(TRUE);
      }
      else {
	return(FALSE);
      }

      BEGP(pt0);
      deref_body(d0, pt0, db_ref_unk, db_ref_nvar);
      return(FALSE);
      ENDP(pt0);
      ENDD(d0);
}

static Int 
p_primitive(void)
{				/* primitive(?)	 */
      BEGD(d0);
      d0 = ARG1;
      deref_head(d0, primitive_unk);
    primitive_nvar:
      if (IsPrimitiveTerm(d0)) {
	return(TRUE);
      }
      else {
	return(FALSE);
      }

      BEGP(pt0);
      deref_body(d0, pt0, primitive_unk, primitive_nvar);
      return(FALSE);
      ENDP(pt0);
      ENDD(d0);
}

static Int 
p_float(void)
{				/* float(?)	 */
      BEGD(d0);
      d0 = ARG1;
      deref_head(d0, float_unk);
    float_nvar:
      if (IsFloatTerm(d0)) {
	return(TRUE);
      }
      else {
	return(FALSE);
      }

      BEGP(pt0);
      deref_body(d0, pt0, float_unk, float_nvar);
      return(FALSE);
      ENDP(pt0);
      ENDD(d0);
}

static Int 
p_compound(void)
{				/* compound(?)	 */
      BEGD(d0);
      d0 = ARG1;
      deref_head(d0, compound_unk);
    compound_nvar:
      if (IsPairTerm(d0)) {
	return(TRUE);
      }
      else if (IsApplTerm(d0)) {
	if (IsExtensionFunctor(FunctorOfTerm(d0))) {
	  return(FALSE);
	}
	return(TRUE);
      }
      else {
	return(FALSE);
      }

      BEGP(pt0);
      deref_body(d0, pt0, compound_unk, compound_nvar);
      return(FALSE);
      ENDP(pt0);
      ENDD(d0);
}

static Int 
p_nonvar(void)
{				/* nonvar(?)	 */
      BEGD(d0);
      d0 = ARG1;
      deref_head(d0, nonvar_unk);
    nonvar_nvar:
      return(TRUE);
	
      BEGP(pt0);
      deref_body(d0, pt0, nonvar_unk, nonvar_nvar);
      return(FALSE);
      ENDP(pt0);
      ENDD(d0);
}

static Int 
p_var(void)
{				/* var(?)	 */
      BEGD(d0);
      d0 = ARG1;
      deref_head(d0, var_unk);
    var_nvar:
      return(FALSE);

      BEGP(pt0);
      deref_body(d0, pt0, var_unk, var_nvar);
      return(TRUE);
      ENDP(pt0);
      ENDD(d0);
}

static Int 
p_equal(void)
{				/* ?=? */
  return(Yap_IUnify(ARG1, ARG2));
}

static Int 
p_eq(void)
{				/* ? == ? */
      BEGD(d0);
      d0 = ARG1;
      deref_head(d0, p_eq_unk1);
    p_eq_nvar1:
      /* first argument is bound */
      BEGD(d1);
      d1 = ARG2;
      deref_head(d1, p_eq_nvar1_unk2);
    p_eq_nvar1_nvar2:
      /* both arguments are bound */
      if (d0 == d1) {
	return(TRUE);
      }
      if (IsPairTerm(d0)) {
	if (!IsPairTerm(d1)) {
	  return(FALSE);
	}
	return(iequ_complex(RepPair(d0)-1, RepPair(d0)+1,RepPair(d1)-1));
      }
      if (IsApplTerm(d0)) {
	Functor f0 = FunctorOfTerm(d0);
	Functor f1;
	if (!IsApplTerm(d1)) {
	  return(FALSE);
	}
	f1 = FunctorOfTerm(d1);
	if (f0 != f1) {
	  return(FALSE);
	}
	if (IsExtensionFunctor(f0)) {
	  switch ((CELL)f0) {
	  case (CELL)FunctorDBRef:
	    return (d0 == d1);
	  case (CELL)FunctorLongInt:
	    return(LongIntOfTerm(d0) == LongIntOfTerm(d1));
#ifdef USE_GMP
	  case (CELL)FunctorBigInt:
	    return (mpz_cmp(Yap_BigIntOfTerm(d0), Yap_BigIntOfTerm(d1)) == 0);
#endif
	  case (CELL)FunctorDouble:
	    return(FloatOfTerm(d0) == FloatOfTerm(d1));
	  default:
	    return(FALSE);
	  }
	}
	return(iequ_complex(RepAppl(d0), RepAppl(d0)+ArityOfFunctor(f0), RepAppl(d1)));
      }
      return(FALSE);

      BEGP(pt0);
      deref_body(d1, pt0, p_eq_nvar1_unk2, p_eq_nvar1_nvar2);
      ENDP(pt0);
      /* first argument is bound */
      /* second argument is unbound */
      /* I don't need to worry about co-routining because an
	 unbound variable may never be == to a constrained variable!! */
      return(FALSE);
      ENDD(d1);

      BEGP(pt0);
      deref_body(d0, pt0, p_eq_unk1, p_eq_nvar1);
      BEGD(d1);
      d1 = ARG2;
      deref_head(d1, p_eq_var1_unk2);
    p_eq_var1_nvar2:
      /* I don't need to worry about co-routining because an
	 unbound variable may never be == to a constrained variable!! */
      return(FALSE);

      BEGP(pt1);
      deref_body(d1, pt1, p_eq_var1_unk2, p_eq_var1_nvar2);
      /* first argument is unbound */
      /* second argument is unbound */
      return(pt1 == pt0);
      ENDP(pt1);
      ENDD(d1);
      ENDP(pt0);

      ENDD(d0);
}

static Int 
p_dif(void)
{				/* ? \= ?  */
#if SHADOW_HB
      register CELL *HBREG = HB;
#endif
      BEGD(d0);
      BEGD(d1);
      d0 = ARG1;
      deref_head(d0, dif_unk1);
    dif_nvar1:
      /* first argument is bound */
      d1 = ARG2;
      deref_head(d1, dif_nvar1_unk2);
    dif_nvar1_nvar2:
      /* both arguments are bound */
      if (d0 == d1) {
	return(FALSE);
      }
      if (IsAtomOrIntTerm(d0) || IsAtomOrIntTerm(d1)) {
	return(TRUE);
      }
      {
#ifdef COROUTINING
	/*
	 * We may wake up goals during our attempt to unify the
	 * two terms. If we are adding to the tail of a list of
	 * woken goals that should be ok, but otherwise we need
	 * to restore WokenGoals to its previous value.
	 */
	CELL OldWokenGoals = Yap_ReadTimedVar(WokenGoals);

#endif
	/* We will have to look inside compound terms */
	BEGP(pt0);
	/* store the old value of TR for clearing bindings */
	pt0 = (CELL *)TR;
	BEGCHO(pt1);
	pt1 = B;
	/* make B and HB point to H to guarantee all bindings will
	 * be trailed
	 */
	HBREG = H;
	B = (choiceptr) H;
	save_hb();
	if (Yap_IUnify(d0, d1)) {
	  /* restore B, no need to restore HB */
	  B = pt1;
#ifdef COROUTINING
	  /* now restore Woken Goals to its old value */
	  Yap_UpdateTimedVar(WokenGoals, OldWokenGoals);
	  if (OldWokenGoals == TermNil) {
	    Yap_undo_signal(YAP_WAKEUP_SIGNAL);
	  }
#endif
	  return FALSE;
	}
	B = pt1;
	/* restore B, and later HB */
	ENDCHO(pt1);
	BEGP(pt1);
	/* untrail all bindings made by Yap_IUnify */
	while (TR != (tr_fr_ptr)pt0) {
	  pt1 = (CELL *) TrailTerm(--TR);
	  RESET_VARIABLE(pt1);
	}
	HBREG = B->cp_h;
	ENDP(pt1);
      }
#ifdef COROUTINING
      /* now restore Woken Goals to its old value */
      Yap_UpdateTimedVar(WokenGoals, OldWokenGoals);
      if (OldWokenGoals == TermNil) {
	Yap_undo_signal(YAP_WAKEUP_SIGNAL);
      }
#endif
      return TRUE;
      ENDP(pt0);

      BEGP(pt0);
      deref_body(d0, pt0, dif_unk1, dif_nvar1);
      ENDP(pt0);
      /* first argument is unbound */
      return(FALSE);

      BEGP(pt0);
      deref_body(d1, pt0, dif_nvar1_unk2, dif_nvar1_nvar2);
      ENDP(pt0);
      /* second argument is unbound */
      return FALSE;
      ENDD(d1);
      ENDD(d0);
}

static Int 
p_arg(void)
{				/* arg(?,?,?)	 */
#if SHADOW_HB
      register CELL *HBREG = HB;
#endif
      BEGD(d0);
      d0 = ARG1;
      deref_head(d0, arg_arg1_unk);
    arg_arg1_nvar:
      /* ARG1 is ok! */
      if (IsIntTerm(d0))
	d0 = IntOfTerm(d0);
      else if (IsLongIntTerm(d0)) {
	d0 = LongIntOfTerm(d0);
      } else {
	Yap_Error(TYPE_ERROR_INTEGER,d0,"arg 1 of arg/3");
	return(FALSE);
      }

      /* d0 now got the argument we want */
      BEGD(d1);
      d1 = ARG2;
      deref_head(d1, arg_arg2_unk);
    arg_arg2_nvar:
      /* d1 now got the structure we want to fetch the argument
       * from */
      if (IsApplTerm(d1)) {
	BEGP(pt0);
	pt0 = RepAppl(d1);
	d1 = *pt0;
	if (IsExtensionFunctor((Functor) d1)) {
	  return(FALSE);
	}
	save_hb();
	if ((Int)d0 <= 0 ||
	    (Int)d0 > ArityOfFunctor((Functor) d1) ||
	    Yap_IUnify(pt0[d0], ARG3) == FALSE) {
	  /* don't complain here for Prolog compatibility 
	  if ((Int)d0 <= 0) {
	    Yap_Error(DOMAIN_ERROR_NOT_LESS_THAN_ZERO,
		  MkIntegerTerm(d0),"arg 1 of arg/3");	    
	  }
	  */
	  return(FALSE);
	}
	return(TRUE);
	ENDP(pt0);
      }
      else if (IsPairTerm(d1)) {
	BEGP(pt0);
	pt0 = RepPair(d1);
	if (d0 == 1) {
	  save_hb();
	  if (Yap_IUnify((CELL)pt0, ARG3) == FALSE) {
	    return(FALSE);
	  }
	  return(TRUE);
	}
	else if (d0 == 2) {
	  save_hb();
	  if (Yap_IUnify((CELL)(pt0+1), ARG3) == FALSE) {
	    return(FALSE);
	  }
	  return(TRUE);
	}
	else {
	  if ((Int)d0 < 0)
	    Yap_Error(DOMAIN_ERROR_NOT_LESS_THAN_ZERO,
		  MkIntegerTerm(d0),"arg 1 of arg/3");	 
	  return(FALSE);
	}
	ENDP(pt0);
      }
      else {
	Yap_Error(TYPE_ERROR_COMPOUND, d1, "arg 2 of arg/3");
	return(FALSE);
      }

      BEGP(pt0);
      deref_body(d1, pt0, arg_arg2_unk, arg_arg2_nvar);
      Yap_Error(INSTANTIATION_ERROR,(CELL)pt0,"arg 2 of arg/3");;
      ENDP(pt0);
      return(FALSE);
      ENDD(d1);

      BEGP(pt0);
      deref_body(d0, pt0, arg_arg1_unk, arg_arg1_nvar);
      Yap_Error(INSTANTIATION_ERROR,(CELL)pt0,"arg 1 of arg/3");;
      ENDP(pt0);
      return(FALSE);
      ENDD(d0);

}

static Int
p_functor(void)			/* functor(?,?,?) */
{
#if SHADOW_HB
  register CELL *HBREG;
#endif

 restart:
#if SHADOW_HB
  HBREG = HB;
#endif
  BEGD(d0);
  d0 = ARG1;
  deref_head(d0, func_unk);
 func_nvar:
  /* A1 is bound */
  BEGD(d1);
  if (IsApplTerm(d0)) {
    d1 = *RepAppl(d0);
    if (IsExtensionFunctor((Functor) d1)) {
      if (d1 == (CELL)FunctorDouble) {
	d1 = MkIntTerm(0);
      } else if (d1 == (CELL)FunctorLongInt) {
	d1 = MkIntTerm(0);
      } else
	  return(FALSE);
    } else {
      d0 = MkAtomTerm(NameOfFunctor((Functor) d1));
      d1 = MkIntTerm(ArityOfFunctor((Functor) d1));
    }
  }
  else if (IsPairTerm(d0)) {
    d0 = TermDot;
    d1 = MkIntTerm(2);
  }
  else {
    d1 = MkIntTerm(0);
  }
  /* d1 and d0 now have the two arguments */
  /* let's go and bind them */
  {
    register CELL arity = d1;
    
    d1 = ARG2;
    deref_head(d1, func_nvar_unk);
  func_nvar_nvar:
    /* A2 was bound */
    if (d0 != d1) {
	return(FALSE);
    }
    /* have to buffer ENDP and label */
    d0 = arity;
    goto func_bind_x3;
    
    BEGP(pt0);
    deref_body(d1, pt0, func_nvar_unk, func_nvar_nvar);
    /* A2 is a variable, go and bind it */
    BIND(pt0, d0, bind_func_nvar_var);
#ifdef COROUTINING
    DO_TRAIL(pt0, d0);
    if (pt0 < H0) Yap_WakeUp(pt0);
  bind_func_nvar_var:
#endif
    /* have to buffer ENDP and label */
    d0 = arity;
    ENDP(pt0);
    /* now let's process A3 */

  func_bind_x3:
    d1 = ARG3;
    deref_head(d1, func_nvar3_unk);
  func_nvar3_nvar:
    /* A3 was bound */
    if (d0 != d1) {
	return(FALSE);
    }
    /* Done */
    return(TRUE);


    BEGP(pt0);
    deref_body(d1, pt0, func_nvar3_unk, func_nvar3_nvar);
    /* A3 is a variable, go and bind it */
    BIND(pt0, d0, bind_func_nvar3_var);
    /* Done */
#ifdef COROUTINING
    DO_TRAIL(pt0, d0);
    if (pt0 < H0) Yap_WakeUp(pt0);
  bind_func_nvar3_var:
#endif
    return(TRUE);

    ENDP(pt0);

  }
  ENDD(d1);

  BEGP(pt0);
  deref_body(d0, pt0, func_unk, func_nvar);
  /* A1 is a variable */
  /* We have to build the structure */
  d0 = ARG2;
  deref_head(d0, func_var_2unk);
 func_var_2nvar:
  /* we do, let's get the third argument */
  BEGD(d1);
  d1 = ARG3;
  deref_head(d1, func_var_3unk);
 func_var_3nvar:
  /* Uuuff, the second and third argument are bound */
  if (IsIntTerm(d1))
    d1 = IntOfTerm(d1);
  else {
    Yap_Error(TYPE_ERROR_INTEGER,ARG3,"functor/3");
    return(FALSE);
  }
  if (!IsAtomicTerm(d0)) {
    Yap_Error(TYPE_ERROR_ATOMIC,d0,"functor/3");
    return(FALSE);
  }
  /* We made it!!!!! we got in d0 the name, in d1 the arity and
   * in pt0 the variable to bind it to. */
  if (d0 == TermDot && d1 == 2) {
    RESET_VARIABLE(H);
    RESET_VARIABLE(H+1);
    d0 = AbsPair(H);
    H += 2;
  }
  else if ((Int)d1 > 0) {
    /* now let's build a compound term */
    if (!IsAtomTerm(d0)) {
      Yap_Error(TYPE_ERROR_ATOM,d0,"functor/3");
      return(FALSE);
    }
    BEGP(pt1);
    if (!IsAtomTerm(d0)) {
      return(FALSE);
    }
    else
      d0 = (CELL) Yap_MkFunctor(AtomOfTerm(d0), (Int) d1);
    pt1 = H;
    *pt1++ = d0;
    d0 = AbsAppl(H);
    if (pt1+d1 > ENV - CreepFlag) {
      if (!Yap_gc(3, ENV, P)) {
	Yap_Error(OUT_OF_STACK_ERROR, TermNil, Yap_ErrorMessage);
	return(FALSE);
      }
      goto restart;
    }
    while (d1-- > 0) {
      RESET_VARIABLE(pt1);
      pt1++;
    }
    /* done building the term */
    H = pt1;
    ENDP(pt1);
  } else if ((Int)d1  < 0) {
    Yap_Error(DOMAIN_ERROR_NOT_LESS_THAN_ZERO,MkIntegerTerm(d1),"functor/3");
    return(FALSE);
  } 
  /* else if arity is 0 just pass d0 through */
  /* Ding, ding, we made it */
  BIND(pt0, d0, bind_func_var_3nvar);
#ifdef COROUTINING
  DO_TRAIL(pt0, d0);
  if (pt0 < H0) Yap_WakeUp(pt0);
 bind_func_var_3nvar:
#endif
  return(TRUE);


  BEGP(pt1);
  deref_body(d1, pt1, func_var_3unk, func_var_3nvar);
  Yap_Error(INSTANTIATION_ERROR,(CELL)pt1,"functor/3");
  ENDP(pt1);
  /* Oops, third argument was unbound */
  return(FALSE);
  ENDD(d1);

  BEGP(pt1);

  deref_body(d0, pt1, func_var_2unk, func_var_2nvar);
  Yap_Error(INSTANTIATION_ERROR,(CELL)pt1,"functor/3");
  ENDP(pt1);
  /* Oops, second argument was unbound too */
  return(FALSE);
  ENDP(pt0);
  ENDD(d0);
}

static Int
p_cut_by( void)
{
  BEGD(d0);
  d0 = ARG1;
  deref_head(d0, cutby_x_unk);
 cutby_x_nvar:
#if SBA
  if (!IsIntegerTerm(d0)) {
#else
  if (!IsIntTerm(d0)) {
#endif
    return(FALSE);
  }
  BEGCHO(pt0);
#if SBA
  pt0 = (choiceptr)IntegerOfTerm(d0);
#else
  pt0 = (choiceptr)(LCL0-IntOfTerm(d0));
#endif
#ifdef YAPOR
    CUT_prune_to(pt0);
#endif /* YAPOR */
  /* find where to cut to */
  if (pt0 > B) {
    /* Wow, we're gonna cut!!! */
#ifdef TABLING
    while (B->cp_b < pt0) {
      B = B->cp_b;
    }
    abolish_incomplete_subgoals(B);
#endif /* TABLING */
    B = pt0;
    HB = B->cp_h;
    /*    trim_trail();*/
  }
  ENDCHO(pt0);
  return(TRUE);

  BEGP(pt0);
  deref_body(d0, pt0, cutby_x_unk, cutby_x_nvar);
  /* never cut to a variable */
  /* Abort */
  return(FALSE);
  ENDP(pt0);
  ENDD(d0);
}

static Int
p_erroneous_call(void)
{
  Yap_Error(SYSTEM_ERROR, TermNil, "bad call to internal built-in");
  return(FALSE);
}

void 
Yap_InitInlines(void)
{
  Yap_InitAsmPred("$$cut_by", 1, _cut_by, p_cut_by, SafePredFlag);

  Yap_InitAsmPred("atom", 1, _atom, p_atom, SafePredFlag);
  Yap_InitAsmPred("atomic", 1, _atomic, p_atomic, SafePredFlag);
  Yap_InitAsmPred("integer", 1, _integer, p_integer, SafePredFlag);
  Yap_InitAsmPred("nonvar", 1, _nonvar, p_nonvar, SafePredFlag);
  Yap_InitAsmPred("number", 1, _number, p_number, SafePredFlag);
  Yap_InitAsmPred("var", 1, _var, p_var, SafePredFlag);
  Yap_InitAsmPred("db_reference", 1, _db_ref, p_db_ref, SafePredFlag);
  Yap_InitAsmPred("primitive", 1, _primitive, p_primitive, SafePredFlag);
  Yap_InitAsmPred("compound", 1, _compound, p_compound, SafePredFlag);
  Yap_InitAsmPred("float", 1, _float, p_float, SafePredFlag);
  Yap_InitAsmPred("=", 2, _equal, p_equal, SafePredFlag);
  Yap_InitAsmPred("\\=", 2, _dif, p_dif, SafePredFlag);
  Yap_InitAsmPred("==", 2, _eq, p_eq, SafePredFlag);
  Yap_InitAsmPred("arg", 3, _arg, p_arg, SafePredFlag);
  Yap_InitAsmPred("functor", 3, _functor, p_functor, SafePredFlag);
  Yap_InitAsmPred("$plus", 3, _plus, p_erroneous_call, SafePredFlag);
  Yap_InitAsmPred("$minus", 3, _minus, p_erroneous_call, SafePredFlag);
  Yap_InitAsmPred("$times", 3, _times, p_erroneous_call, SafePredFlag);
  Yap_InitAsmPred("$div", 3, _div, p_erroneous_call, SafePredFlag);
  Yap_InitAsmPred("$and", 3, _and, p_erroneous_call, SafePredFlag);
  Yap_InitAsmPred("$or", 3, _or, p_erroneous_call, SafePredFlag);
  Yap_InitAsmPred("$sll", 3, _sll, p_erroneous_call, SafePredFlag);
  Yap_InitAsmPred("$slr", 3, _slr, p_erroneous_call, SafePredFlag);
}