693 lines
18 KiB
C
Executable File
693 lines
18 KiB
C
Executable File
/*************************************************************************
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* *
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* YAP Prolog %W% %G% *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: Regs.h *
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* mods: *
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* comments: YAP abstract machine registers *
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* version: $Id: Regs.h,v 1.42 2008-08-12 01:27:22 vsc Exp $ *
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*************************************************************************/
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#ifndef REGS_H
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#define REGS_H 1
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/********* abstract machine registers **********************************/
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#ifdef YAP_H
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#include "cut_c.h"
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#endif
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#define MaxTemps 512
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#define MaxArithms 32
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#if defined(__x86_64__)
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#define PUSH_REGS 1
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#undef PUSH_X
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#elif defined(i386)
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#undef PUSH_REGS
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#undef PUSH_X
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#elif defined(sparc)
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#define PUSH_REGS 1
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#undef PUSH_X
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#elif defined(__alpha)
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#undef PUSH_REGS
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#undef PUSH_X
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#elif defined(_POWER) || defined(__POWERPC__)
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#undef PUSH_REGS
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#undef PUSH_X
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#elif defined( hppa )
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#undef PUSH_REGS
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#undef PUSH_X
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#endif
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/* force a cache of WAM regs for multi-threaded architectures! */
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#ifdef THREADS
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#ifndef PUSH_REGS
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#define PUSH_REGS 1
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#endif
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#ifndef PUSH_X
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#define PUSH_X 1
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#endif
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#endif
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#if _MSC_VER
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// no support for __builtin_expect
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#define __builtin_expect(Exp, Val) (Exp)
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#endif
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#include "inline-only.h"
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INLINE_ONLY void restore_machine_regs(void);
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INLINE_ONLY void save_machine_regs(void);
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INLINE_ONLY void restore_H(void);
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INLINE_ONLY void save_H(void);
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INLINE_ONLY void restore_B(void);
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INLINE_ONLY void save_B(void);
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#define CACHE_REGS
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#define REFRESH_CACHE_REGS
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#define INIT_REGS
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#define PASS_REGS1
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#define PASS_REGS
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#define USES_REGS1 void
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#define USES_REGS
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#define WORKER_REGS(WID)
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typedef struct regstore_t
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{
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CELL EventFlag_; /* 13 */
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CELL CreepFlag_; /* 13 */
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yamop *P_; /* 7 prolog machine program counter */
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CELL *HB_; /* 4 heap (global) stack top at latest c.p. */
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#if defined(YAPOR_SBA) || defined(TABLING)
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choiceptr BB_; /* 4 local stack top at latest c.p. */
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#endif /* YAPOR_SBA || TABLING */
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CELL *H0_; /* 2 base of heap (global) stack */
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tr_fr_ptr TR_; /* 24 top of trail */
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CELL *H_; /* 25 top of heap (global) stack */
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choiceptr B_; /* 26 latest choice point */
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#ifdef DEPTH_LIMIT
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CELL DEPTH_; /* 27 */
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#endif /* DEPTH_LIMIT */
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yamop *CP_; /* 28 continuation program counter */
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CELL *ENV_; /* 1 current environment */
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struct cut_c_str *CUT_C_TOP;
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CELL *YENV_; /* 5 current environment (may differ from ENV)*/
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CELL *S_; /* 6 structure pointer */
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CELL *ASP_; /* 8 top of local stack */
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CELL *LCL0_; /* 3 local stack base */
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tr_fr_ptr CurrentTrailTop_; /* 10 Auxiliary stack top */
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ADDR AuxBase_; /* 9 Auxiliary base pointer */
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CELL *AuxSp_; /* 9 Auxiliary stack pointer */
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ADDR AuxTop_; /* 10 Auxiliary stack top */
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/* visualc*/
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Term CurrentModule_;
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struct myddas_global *MYDDAS_GLOBAL_POINTER;
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#if defined(YAPOR_SBA) || defined(TABLING)
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CELL *H_FZ_;
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choiceptr B_FZ_;
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tr_fr_ptr TR_FZ_;
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#endif /* YAPOR_SBA || TABLING */
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struct pred_entry *PP_;
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#if defined(YAPOR) || defined(THREADS)
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unsigned int worker_id_;
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struct worker_local *worker_local_;
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/* recursive write-locks for PredEntry */
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yamop **PREG_ADDR_;
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#ifdef YAPOR_SBA
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choiceptr BSEG_;
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struct or_frame *frame_head_, *frame_tail_;
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char *binding_array_;
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int sba_offset_;
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int sba_end_;
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int sba_size_;
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#endif /* YAPOR_SBA */
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#endif /* YAPOR || THREADS */
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#if PUSH_REGS
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/* On a X86 machine, the best solution is to keep the
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X registers on a global variable, whose address is known between
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runs, and to push the remaining registers to the stack.
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On a register based machine, one can have a dedicated register,
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always pointing to the XREG global variable. This spends an
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extra register, but makes it easier to access X[1].
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*/
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#ifdef PUSH_X
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Term XTERMS[MaxTemps]; /* 29 */
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#endif
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yamop *ARITH_EXCEPTION_;
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}
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REGSTORE;
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extern REGSTORE *Yap_regp;
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#ifdef PUSH_X
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#define XREGS (Yapregp->XTERMS)
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#else
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/* keep X as a global variable */
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extern Term Yap_XREGS[MaxTemps]; /* 29 */
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#define XREGS Yap_XREGS
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#endif
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#ifdef THREADS
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extern pthread_key_t Yap_yaamregs_key;
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#undef CACHE_REGS
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#undef REFRESH_CACHE_REGS
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#undef INIT_REGS
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#undef CACHE_REGS
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#undef PASS_REGS
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#undef PASS_REGS1
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#undef USES_REGS
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#undef USES_REGS1
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#undef WORKER_REGS
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#define CACHE_REGS REGSTORE *regcache = ((REGSTORE *)pthread_getspecific(Yap_yaamregs_key));
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#define REFRESH_CACHE_REGS regcache = ((REGSTORE *)pthread_getspecific(Yap_yaamregs_key));
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#define INIT_REGS , ((REGSTORE *)pthread_getspecific(Yap_yaamregs_key))
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#define WORKER_REGS(WID) REGSTORE *regcache = REMOTE_ThreadHandle(WID).current_yaam_regs;
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#define PASS_REGS1 regcache
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#define PASS_REGS , regcache
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#define USES_REGS1 struct regstore_t *regcache
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#define USES_REGS , struct regstore_t *regcache
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#define Yap_regp regcache
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#endif
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#define Yap_REGS (*Yap_regp)
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#else /* !PUSH_REGS */
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Term X[MaxTemps]; /* 29 */
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#define XREGS Yap_REGS.X
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}
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REGSTORE;
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extern REGSTORE Yap_REGS;
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#endif /* PUSH_REGS */
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#define MinTrailGap (sizeof(CELL)*1024)
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#define MinHeapGap (sizeof(CELL)*4096)
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#define MinStackGap (sizeof(CELL)*8*1024)
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#define ENV Yap_REGS.ENV_ /* current environment */
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#define ASP Yap_REGS.ASP_ /* top of local stack */
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#define H0 Yap_REGS.H0_ /* base of heap (global) stack */
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#define LCL0 Yap_REGS.LCL0_ /* local stack base */
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#define YENV2MEM
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#define YENV_ADDRESS (&(YENV))
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#define MEM2YENV
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#if defined(__GNUC__) && defined(__alpha)
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#define P Yap_REGS.P_ /* prolog machine program counter */
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#define YENV Yap_REGS.YENV_ /* current environment (may differ from ENV) */
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register CELL *HR asm ("$9");
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register CELL *HB asm ("$10");
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register choiceptr B asm ("$11");
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register yamop *CP asm ("$12");
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register CELL *S asm ("$13");
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register tr_fr_ptr TR asm ("$14");
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/* gcc+debug chokes if $15 is in use on alphas */
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#ifdef DEBUG
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#define CreepFlag Yap_REGS.CreepFlag_
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#else
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register CELL CreepFlag asm ("$15");
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#endif
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/* Interface with foreign code, make sure the foreign code sees all the
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registers the way they used to be */
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INLINE_ONLY void save_machine_regs(void) {
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Yap_REGS.H_ = HR;
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Yap_REGS.HB_ = HB;
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Yap_REGS.B_ = B;
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Yap_REGS.CP_ = CP;
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#ifndef DEBUG
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Yap_REGS.CreepFlag_ = CreepFlag;
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#endif
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Yap_REGS.TR_ = TR;
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}
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INLINE_ONLY void restore_machine_regs(void) {
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HR = Yap_REGS.H_;
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HB = Yap_REGS.HB_;
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B = Yap_REGS.B_;
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CP = Yap_REGS.CP_;
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#ifndef DEBUG
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CreepFlag = Yap_REGS.CreepFlag_;
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#endif
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TR = Yap_REGS.TR_;
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}
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#define BACKUP_MACHINE_REGS() \
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CELL *BK_H = H; \
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CELL *BK_HB = HB; \
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choiceptr BK_B = B; \
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CELL BK_CreepFlag = CreepFlag; \
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yamop *BK_CP = CP; \
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tr_fr_ptr BK_TR = TR; \
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restore_machine_regs()
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#define RECOVER_MACHINE_REGS() \
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save_machine_regs(); \
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H = BK_H; \
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HB = BK_HB; \
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B = BK_B; \
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CreepFlag = BK_CreepFlag; \
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CP = BK_CP; \
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TR = BK_TR
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INLINE_ONLY void save_H(void) {
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Yap_REGS.H_ = HR;
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}
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INLINE_ONLY void restore_H(void) {
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HR = Yap_REGS.H_;
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}
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#define BACKUP_H() CELL *BK_H = HR; restore_H()
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#define RECOVER_H() save_H(); HR = BK_H
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INLINE_ONLY void save_B(void) {
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Yap_REGS.B_ = B;
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}
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INLINE_ONLY void restore_B(void) {
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B = Yap_REGS.B_;
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}
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#define BACKUP_B() choiceptr BK_B = B; restore_B()
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#define RECOVER_B() save_B(); B = BK_B
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INLINE_ONLY EXTERN void restore_TR(void);
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INLINE_ONLY EXTERN void save_TR(void);
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INLINE_ONLY void save_TR(void) {
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Yap_REGS.TR_ = TR;
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}
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INLINE_ONLY void restore_TR(void) {
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TR = Yap_REGS.TR_;
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}
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#elif defined(__GNUC__) && defined(hppa)
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#define P Yap_REGS.P_ /* prolog machine program counter */
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#define YENV Yap_REGS.YENV_ /* current environment (may differ from ENV) */
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register CELL *HR asm ("r12");
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register CELL *HB asm ("r13");
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register choiceptr B asm ("r14");
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register yamop *CP asm ("r15");
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register CELL *S asm ("r16");
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register CELL CreepFlag asm ("r17");
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register tr_fr_ptr TR asm ("r18");
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INLINE_ONLY void save_machine_regs(void) {
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Yap_REGS.H_ = HR;
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Yap_REGS.HB_ = HB;
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Yap_REGS.B_ = B;
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Yap_REGS.CP_ = CP;
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Yap_REGS.CreepFlag_ = CreepFlag;
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Yap_REGS.TR_ = TR;
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}
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INLINE_ONLY void restore_machine_regs(void) {
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HR = Yap_REGS.H_;
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HB = Yap_REGS.HB_;
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B = Yap_REGS.B_;
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CP = Yap_REGS.CP_;
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CreepFlag = Yap_REGS.CreepFlag_;
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TR = Yap_REGS.TR_;
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}
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#define BACKUP_MACHINE_REGS() \
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CELL *BK_H = HR; \
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CELL *BK_HB = HB; \
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choiceptr BK_B = B; \
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CELL BK_CreepFlag = CreepFlag; \
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yamop *BK_CP = CP; \
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tr_fr_ptr BK_TR = TR; \
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restore_machine_regs()
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#define RECOVER_MACHINE_REGS() \
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save_machine_regs(); \
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HR = BK_H; \
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HB = BK_HB; \
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B = BK_B; \
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CreepFlag = BK_CreepFlag; \
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CP = BK_CP; \
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TR = BK_TR
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INLINE_ONLY void save_H(void) {
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Yap_REGS.H_ = HR;
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}
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INLINE_ONLY void restore_H(void) {
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HR = Yap_REGS.H_;
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}
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#define BACKUP_H() CELL *BK_H = HR; restore_H()
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#define RECOVER_H() save_H(); HR = BK_H
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INLINE_ONLY void save_B(void) {
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Yap_REGS.B_ = B;
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}
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INLINE_ONLY void restore_B(void) {
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B = Yap_REGS.B_;
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}
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#define BACKUP_B() choiceptr BK_B = B; restore_B()
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#define RECOVER_B() save_B(); B = BK_B
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INLINE_ONLY EXTERN void restore_TR(void);
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INLINE_ONLY EXTERN void save_TR(void);
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INLINE_ONLY void save_TR(void) {
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Yap_REGS.TR_ = TR;
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}
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INLINE_ONLY void restore_TR(void) {
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TR = Yap_REGS.TR_;
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}
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#elif defined(__GNUC__) && (defined(_POWER) || defined(__POWERPC__))
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/*
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Because of a bug in GCC, we should always start from the first available
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general register. According to rs6000.h, this is r13 everywhere
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except for svr4 machines, where r13 is fixed.
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If we don't do so, GCC will generate move multiple instructions for
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entering complex functions. These instructions will save and
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restore the global registers :-(.
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*/
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#define CreepFlag Yap_REGS.CreepFlag_
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/*
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vsc: this MUST start from register 13, otherwise GCC will break down in flames and
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use the registers for evil purposes. :-(
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*/
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#ifndef __svr4__
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register tr_fr_ptr TR asm ("r13");
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#else
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register tr_fr_ptr TR asm ("r21");
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#endif
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register CELL *HR asm ("r14");
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register CELL *HB asm ("r15");
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register choiceptr B asm ("r16");
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register yamop *CP asm ("r17");
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register CELL *S asm ("r18");
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register CELL *YENV asm ("r19");
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#define P Yap_REGS.P_ /* prolog machine program counter */
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#undef YENV2MEM
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#undef YENV_ADDRESS (&(YENV))
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#undef MEM2YENV
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#define YENV2MEM { CELL *YENV_MEM = YENV
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#define YENV_ADDRESS (&YENV_MEM)
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#define MEM2YENV YENV = YENV_MEM; }
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INLINE_ONLY void save_machine_regs(void) {
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Yap_REGS.H_ = HR;
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Yap_REGS.HB_ = HB;
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Yap_REGS.B_ = B;
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Yap_REGS.CP_ = CP;
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Yap_REGS.YENV_ = YENV;
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Yap_REGS.TR_ = TR;
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}
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INLINE_ONLY void restore_machine_regs(void) {
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HR = Yap_REGS.H_;
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HB = Yap_REGS.HB_;
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B = Yap_REGS.B_;
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CP = Yap_REGS.CP_;
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YENV = Yap_REGS.YENV_;
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TR = Yap_REGS.TR_;
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}
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#define BACKUP_MACHINE_REGS() \
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CELL *BK_H = HR; \
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CELL *BK_HB = HB; \
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choiceptr BK_B = B; \
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yamop *BK_CP = CP; \
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tr_fr_ptr BK_TR = TR; \
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restore_machine_regs()
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#define RECOVER_MACHINE_REGS() \
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save_machine_regs(); \
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HR = BK_H; \
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HB = BK_HB; \
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B = BK_B; \
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CP = BK_CP; \
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TR = BK_TR
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INLINE_ONLY void save_H(void) {
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Yap_REGS.H_ = HR;
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}
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INLINE_ONLY void restore_H(void) {
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HR = Yap_REGS.H_;
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}
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#define BACKUP_H() CELL *BK_H = HR; restore_H()
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#define RECOVER_H() save_H(); HR = BK_H
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INLINE_ONLY void save_B(void) {
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Yap_REGS.B_ = B;
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}
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INLINE_ONLY void restore_B(void) {
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B = Yap_REGS.B_;
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}
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#define BACKUP_B() choiceptr BK_B = B; restore_B()
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#define RECOVER_B() save_B(); B = BK_B
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INLINE_ONLY EXTERN void restore_TR(void);
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INLINE_ONLY EXTERN void save_TR(void);
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INLINE_ONLY void save_TR(void) {
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Yap_REGS.TR_ = TR;
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}
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INLINE_ONLY void restore_TR(void) {
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TR = Yap_REGS.TR_;
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}
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#else
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/** continuation program counter: what to do when we exit the goal. */
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#define CP (Yap_REGS.CP_)
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#define P Yap_REGS.P_ /* prolog machine program counter */
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/** current environment (may be pointing at an enevironment frame before the neck sets ENV) */
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#define YENV (Yap_REGS).YENV_
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#define S Yap_REGS.S_ /* structure pointer */
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#define HR Yap_REGS.H_ /* top of heap (global) stack */
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#define B Yap_REGS.B_ /* latest choice point */
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#define TR Yap_REGS.TR_ /* top of trail */
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#define HB Yap_REGS.HB_ /* heap (global) stack top at time of latest c.p. */
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#define CreepFlag Yap_REGS.CreepFlag_
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INLINE_ONLY void save_machine_regs(void) {
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}
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INLINE_ONLY void restore_machine_regs(void) {
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}
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#define BACKUP_MACHINE_REGS()
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#define RECOVER_MACHINE_REGS()
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INLINE_ONLY void save_H(void) {
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}
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INLINE_ONLY void restore_H(void) {
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}
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#define BACKUP_H()
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#define RECOVER_H()
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INLINE_ONLY void save_B(void) {
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}
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INLINE_ONLY void restore_B(void) {
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}
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#define BACKUP_B()
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#define RECOVER_B()
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#define restore_TR()
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#endif
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#define AuxBase Yap_REGS.AuxBase_
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#define AuxSp Yap_REGS.AuxSp_
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#define AuxTop Yap_REGS.AuxTop_
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#define CurrentTrailTop Yap_REGS.CurrentTrailTop_
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#define DEPTH Yap_REGS.DEPTH_
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#if defined(YAPOR_SBA) || defined(TABLING)
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#define H_FZ Yap_REGS.H_FZ_
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#define B_FZ Yap_REGS.B_FZ_
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#define TR_FZ Yap_REGS.TR_FZ_
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#endif /* YAPOR_SBA || TABLING */
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#define PP (Yap_REGS.PP_)
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#if defined(YAPOR) || defined(THREADS)
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#define worker_id (Yap_REGS.worker_id_)
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#define LOCAL (Yap_REGS.worker_local_)
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#define PREG_ADDR (Yap_REGS.PREG_ADDR_)
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#ifdef YAPOR_SBA
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#define BSEG Yap_REGS.BSEG_
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#define binding_array Yap_REGS.binding_array_
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#define sba_offset Yap_REGS.sba_offset_
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#define sba_end Yap_REGS.sba_end_
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#define sba_size Yap_REGS.sba_size_
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#define frame_head Yap_REGS.frame_head_
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#define frame_tail Yap_REGS.frame_tail_
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#endif /* YAPOR_SBA */
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#else
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#define worker_id 0
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#define LOCAL (&Yap_local)
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#endif /* YAPOR || THREADS */
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#define CurrentModule Yap_REGS.CurrentModule_
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#define ARITH_EXCEPTION Yap_REGS.ARITH_EXCEPTION_
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#define Yap_isint Yap_REGS.isint_
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#define Yap_Floats Yap_REGS.Floats_
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#define Yap_Ints Yap_REGS.Ints_
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#define EventFlag Yap_REGS.EventFlag_
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#define REG_SIZE sizeof(REGS)/sizeof(CELL *)
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#define ARG1 XREGS[1]
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#define ARG2 XREGS[2]
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#define ARG3 XREGS[3]
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#define ARG4 XREGS[4]
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#define ARG5 XREGS[5]
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#define ARG6 XREGS[6]
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#define ARG7 XREGS[7]
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#define ARG8 XREGS[8]
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#define ARG9 XREGS[9]
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#define ARG10 XREGS[10]
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#define ARG11 XREGS[11]
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#define ARG12 XREGS[12]
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#define ARG13 XREGS[13]
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#define ARG14 XREGS[14]
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#define ARG15 XREGS[15]
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#define ARG16 XREGS[16]
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/* by default, define HBREG to be HB */
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#define HBREG HB
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#if defined(YAPOR_SBA) || defined(TABLING)
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#define BB Yap_REGS.BB_
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#define BBREG BB
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#endif /* YAPOR_SBA || TABLING */
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// define how to handle frozen segments in tabling, etv.
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#ifdef FROZEN_STACKS
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#ifdef YAPOR_SBA
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#define PROTECT_FROZEN_H(CPTR) \
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((Unsigned((Int)((CPTR)->cp_h)-(Int)(H_FZ)) < \
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Unsigned((Int)(B_FZ)-(Int)(H_FZ))) ? \
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(CPTR)->cp_h : H_FZ)
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|
#define PROTECT_FROZEN_B(CPTR) \
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((Unsigned((Int)(CPTR)-(Int)(H_FZ)) < \
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Unsigned((Int)(B_FZ)-(Int)(H_FZ))) ? \
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|
(CPTR) : B_FZ)
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|
/*
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#define PROTECT_FROZEN_H(CPTR) ((CPTR)->cp_h > H_FZ && (CPTR)->cp_h < (CELL *)B_FZ ? (CPTR)->cp_h : H_FZ )
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|
|
|
#define PROTECT_FROZEN_B(CPTR) ((CPTR) < B_FZ && (CPTR) > (choiceptr)H_FZ ? (CPTR) : B_FZ )
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|
*/
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|
#else /* TABLING */
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|
#define PROTECT_FROZEN_B(CPTR) (YOUNGER_CP(CPTR, B_FZ) ? CPTR : B_FZ)
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|
#define PROTECT_FROZEN_H(CPTR) (((CPTR)->cp_h > H_FZ) ? (CPTR)->cp_h : H_FZ)
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|
#endif /* YAPOR_SBA */
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|
#else
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|
#define PROTECT_FROZEN_B(CPTR) (CPTR)
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|
#define PROTECT_FROZEN_H(CPTR) (CPTR)->cp_h
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|
#endif /* FROZEN_STACKS */
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|
|
|
|
|
#if !defined(THREADS)
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|
/* use actual addresses for regs */
|
|
#define PRECOMPUTE_REGADDRESS 1
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|
#endif /* THREADS */
|
|
|
|
|
|
/* aggregate several abstract machine operations in a single */
|
|
#define AGGREGATE_OPS 1
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|
|
|
/* make standard registers globally accessible so that they are there
|
|
when we come from a longjmp */
|
|
#if PUSH_REGS
|
|
/* In this case we need to initialize the abstract registers */
|
|
extern REGSTORE Yap_standard_regs;
|
|
#endif /* PUSH_REGS */
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|
|
|
/******************* controlling debugging ****************************/
|
|
static inline UInt
|
|
StackGap( USES_REGS1 )
|
|
{
|
|
UInt gmin = (LCL0-H0)>>2;
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|
|
|
if (gmin < MinStackGap) gmin = MinStackGap;
|
|
// if (gmin > 1024*1024) return 1024*1024;
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|
return gmin;
|
|
}
|
|
|
|
static inline void
|
|
CalculateStackGap( USES_REGS1 )
|
|
{
|
|
CreepFlag = EventFlag = StackGap( PASS_REGS1 );
|
|
}
|
|
|
|
#define SET_ASP(Y,S) SET_ASP__(Y,S PASS_REGS)
|
|
|
|
INLINE_ONLY void SET_ASP__(CELL *yreg, Int sz USES_REGS);
|
|
|
|
INLINE_ONLY void SET_ASP__(CELL *yreg, Int sz USES_REGS) {
|
|
ASP = (CELL *) (((char *) yreg) + sz);
|
|
if (ASP > (CELL *)PROTECT_FROZEN_B(B))
|
|
ASP = (CELL *)PROTECT_FROZEN_B(B);
|
|
}
|
|
|
|
#endif
|