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- /************************************************************************
- * *
- * The SB-Prolog System *
- * Copyright SUNY at Stony Brook, 1986; University of Arizona, 1987 *
- * *
- ************************************************************************/
-
- /*-----------------------------------------------------------------
- SB-Prolog is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY. No author or distributor
- accepts responsibility to anyone for the consequences of using it
- or for whether it serves any particular purpose or works at all,
- unless he says so in writing. Refer to the SB-Prolog General Public
- License for full details.
-
- Everyone is granted permission to copy, modify and redistribute
- SB-Prolog, but only under the conditions described in the
- SB-Prolog General Public License. A copy of this license is
- supposed to have been given to you along with SB-Prolog so you
- can know your rights and responsibilities. It should be in a
- file named COPYING. Among other things, the copyright notice
- and this notice must be preserved on all copies.
- ------------------------------------------------------------------ */
- #include "builtin.h"
-
- #ifdef THREADED
- #define JUMP_TABLE_SIZE 128
- extern LONG jumtable[ JUMP_TABLE_SIZE ];
- #endif
-
- b_THREAD()
- {
- register LONG op1, op2;
- register LONG_PTR top;
-
- op1 = reg[1];
- DEREF(op1);
- op2 = reg[2];
- DEREF(op2);
-
- #ifdef THREADED
- op1 = MAKEINT(jmptable[INTVAL(op1)]);
- #endif
-
- if(!unify(op1, op2)) {
- FAIL0;
- }
- }
-