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5c2e06ad50
yap-6.3/H/Regs.h
tiagosoares 83b5a160f8 support for executing c code when a cut occurs 
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1463 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2005-11-18 18:52:41 +00:00

736 lines
18 KiB
C
Raw Blame History

/*************************************************************************
* *
* YAP Prolog %W% %G% *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: Regs.h *
* mods: *
* comments: YAP abstract machine registers *
* version: $Id: Regs.h,v 1.31 2005-11-18 18:50:34 tiagosoares Exp $ *
*************************************************************************/
/********* abstract machine registers **********************************/
#ifdef CUT_C
#include "cut_c.h"
#endif
#define MaxTemps 512
#ifdef i386
#define PUSH_REGS 1
#undef PUSH_X
#endif
#if defined(sparc) || defined(__sparc)
#undef PUSH_REGS
#undef PUSH_X
#endif
#ifdef __alpha
#undef PUSH_REGS
#undef PUSH_X
#endif
#ifdef _POWER
#undef PUSH_REGS
#undef PUSH_X
#endif
#ifdef hppa
#undef PUSH_REGS
#undef PUSH_X
#endif
#ifdef mips
#undef PUSH_REGS
#undef PUSH_X
#endif
/* force a cache of WAM regs for multi-threaded architectures! */
#ifdef THREADS
#ifndef PUSH_REGS
#define PUSH_REGS 1
#endif
#ifndef PUSH_X
#define PUSH_X 1
#endif
#endif
EXTERN void restore_machine_regs(void);
EXTERN void save_machine_regs(void);
EXTERN void restore_H(void);
EXTERN void save_H(void);
EXTERN void restore_B(void);
EXTERN void save_B(void);
typedef struct
{
CELL CreepFlag_; /* 13 */
CELL *HB_; /* 4 heap (global) stack top at latest c.p. */
#if defined(SBA) || defined(TABLING)
choiceptr BB_; /* 4 local stack top at latest c.p. */
#endif /* SBA || TABLING */
CELL *H0_; /* 2 base of heap (global) stack */
tr_fr_ptr TR_; /* 24 top of trail */
CELL *H_; /* 25 top of heap (global) stack */
choiceptr B_; /* 26 latest choice point */
#ifdef CUT_C
cut_c_str_ptr CUT_C_TOP;
#endif
#ifdef DEPTH_LIMIT
CELL DEPTH_; /* 27 */
#endif /* DEPTH_LIMIT */
yamop *CP_; /* 28 continuation program counter */
yamop *P_; /* 7 prolog machine program counter */
CELL *YENV_; /* 5 current environment (may differ from ENV)*/
CELL *S_; /* 6 structure pointer */
CELL *ENV_; /* 1 current environment */
CELL *ASP_; /* 8 top of local stack */
CELL *LCL0_; /* 3 local stack base */
CELL *AuxSp_; /* 9 Auxiliary stack pointer */
ADDR AuxTop_; /* 10 Auxiliary stack top */
/* visualc*/
CELL EX_; /* 18 */
#ifdef COROUTINING
Term DelayedVars_; /* maximum number of attributed variables */
#endif
Term CurrentModule_;
#if defined(SBA) || defined(TABLING)
CELL *H_FZ_;
choiceptr B_FZ_;
tr_fr_ptr TR_FZ_;
#endif /* SBA || TABLING */
#if defined(YAPOR) || defined(THREADS)
struct pred_entry *PP_;
/* recursive write-locks for PredEntry */
yamop **PREG_ADDR_;
unsigned int worker_id_;
#ifdef SBA
choiceptr BSEG_;
struct or_frame *frame_head_, *frame_tail_;
char *binding_array_;
int sba_offset_;
int sba_end_;
int sba_size_;
#endif /* SBA */
#endif /* YAPOR || THREADS */
#if PUSH_REGS
/* On a X86 machine, the best solution is to keep the
X registers on a global variable, whose address is known between
runs, and to push the remaining registers to the stack.
On a register based machine, one can have a dedicated register,
always pointing to the XREG global variable. This spends an
extra register, but makes it easier to access X[1].
*/
#if PUSH_X
Term XTERMS[MaxTemps]; /* 29 */
#endif
}
REGSTORE;
extern REGSTORE *Yap_regp;
#if PUSH_X
#define XREGS (Yap_REGS.XTERMS)
#else
/* keep X as a global variable */
Term Yap_XREGS[MaxTemps]; /* 29 */
#define XREGS Yap_XREGS
#endif
#ifdef THREADS
extern pthread_key_t Yap_yaamregs_key;
#define Yap_regp ((REGSTORE *)pthread_getspecific(Yap_yaamregs_key))
#endif
#define Yap_REGS (*Yap_regp)
#else /* !PUSH_REGS */
Term X[MaxTemps]; /* 29 */
#define XREGS Yap_REGS.X
}
REGSTORE;
extern REGSTORE Yap_REGS;
#endif /* PUSH_REGS */
#define MinTrailGap (sizeof(CELL)*1024)
#define MinHeapGap (sizeof(CELL)*4096)
#define MinStackGap (sizeof(CELL)*8*1024)
extern int Yap_stack_overflows;
#define ENV Yap_REGS.ENV_ /* current environment */
#define ASP Yap_REGS.ASP_ /* top of local stack */
#define H0 Yap_REGS.H0_ /* base of heap (global) stack */
#define LCL0 Yap_REGS.LCL0_ /* local stack base */
#if defined(__GNUC__) && defined(sparc) && !defined(__NetBSD__) && !defined(THREADS)
#define P Yap_REGS.P_ /* prolog machine program counter */
#define YENV Yap_REGS.YENV_ /* current environment (may differ from ENV)*/
#define S Yap_REGS.S_ /* structure pointer */
register CELL *H asm ("g6");
register tr_fr_ptr TR asm ("g7");
#if defined(__svr4__)
register choiceptr B asm ("g5");
#else
#define B Yap_REGS.B_ /* latest choice point */
#endif
#define CP Yap_REGS.CP_ /* continuation program counter */
#define HB Yap_REGS.HB_ /* heap (global) stack top at time of latest c.p. */
#define CreepFlag Yap_REGS.CreepFlag_
EXTERN inline void save_machine_regs(void) {
Yap_REGS.H_ = H;
Yap_REGS.TR_ = TR;
#if defined(__svr4__)
Yap_REGS.B_ = B;
#endif
}
EXTERN inline void restore_machine_regs(void) {
H = Yap_REGS.H_;
TR = Yap_REGS.TR_;
#if defined(__svr4__)
B = Yap_REGS.B_;
#endif
}
#define BACKUP_MACHINE_REGS() \
CELL *BK_H = H; \
choiceptr BK_B = B; \
tr_fr_ptr BK_TR = TR; \
restore_machine_regs()
#define RECOVER_MACHINE_REGS() \
save_machine_regs(); \
H = BK_H; \
B = BK_B; \
TR = BK_TR
EXTERN inline void save_H(void) {
Yap_REGS.H_ = H;
}
EXTERN inline void restore_H(void) {
H = Yap_REGS.H_;
}
#define BACKUP_H() CELL *BK_H = H; restore_H()
#define RECOVER_H() save_H(); H = BK_H
EXTERN inline void save_B(void) {
#if defined(__svr4__)
Yap_REGS.B_ = B;
#endif
}
EXTERN inline void restore_B(void) {
#if defined(__svr4__)
B = Yap_REGS.B_;
#endif
}
#if defined(__svr4__)
#define BACKUP_B() choiceptr BK_B = B; restore_B()
#define RECOVER_B() save_B(); B = BK_B
#else
#define BACKUP_B()
#define RECOVER_B()
#endif
#elif defined(__GNUC__) && defined(__alpha)
#define P Yap_REGS.P_ /* prolog machine program counter */
#define YENV Yap_REGS.YENV_ /* current environment (may differ from ENV) */
register CELL *H asm ("$9");
register CELL *HB asm ("$10");
register choiceptr B asm ("$11");
register yamop *CP asm ("$12");
register CELL *S asm ("$13");
register tr_fr_ptr TR asm ("$14");
/* gcc+debug chokes if $15 is in use on alphas */
#ifdef DEBUG
#define CreepFlag Yap_REGS.CreepFlag_
#else
register CELL CreepFlag asm ("$15");
#endif
/* Interface with foreign code, make sure the foreign code sees all the
registers the way they used to be */
EXTERN inline void save_machine_regs(void) {
Yap_REGS.H_ = H;
Yap_REGS.HB_ = HB;
Yap_REGS.B_ = B;
Yap_REGS.CP_ = CP;
#ifndef DEBUG
Yap_REGS.CreepFlag_ = CreepFlag;
#endif
Yap_REGS.TR_ = TR;
}
EXTERN inline void restore_machine_regs(void) {
H = Yap_REGS.H_;
HB = Yap_REGS.HB_;
B = Yap_REGS.B_;
CP = Yap_REGS.CP_;
#ifndef DEBUG
CreepFlag = Yap_REGS.CreepFlag_;
#endif
TR = Yap_REGS.TR_;
}
#define BACKUP_MACHINE_REGS() \
CELL *BK_H = H; \
CELL *BK_HB = HB; \
choiceptr BK_B = B; \
CELL BK_CreepFlag = CreepFlag; \
yamop *BK_CP = CP; \
tr_fr_ptr BK_TR = TR; \
restore_machine_regs()
#define RECOVER_MACHINE_REGS() \
save_machine_regs(); \
H = BK_H; \
HB = BK_HB; \
B = BK_B; \
CreepFlag = BK_CreepFlag; \
CP = BK_CP; \
TR = BK_TR
EXTERN inline void save_H(void) {
Yap_REGS.H_ = H;
}
EXTERN inline void restore_H(void) {
H = Yap_REGS.H_;
}
#define BACKUP_H() CELL *BK_H = H; restore_H()
#define RECOVER_H() save_H(); H = BK_H
EXTERN inline void save_B(void) {
Yap_REGS.B_ = B;
}
EXTERN inline void restore_B(void) {
B = Yap_REGS.B_;
}
#define BACKUP_B() choiceptr BK_B = B; restore_B()
#define RECOVER_B() save_B(); B = BK_B
EXTERN void restore_TR(void);
EXTERN void save_TR(void);
EXTERN inline void save_TR(void) {
Yap_REGS.TR_ = TR;
}
EXTERN inline void restore_TR(void) {
TR = Yap_REGS.TR_;
}
#elif defined(__GNUC__) && defined(mips)
#define P Yap_REGS.P_ /* prolog machine program counter */
#define YENV Yap_REGS.YENV_ /* current environment (may differ from ENV) */
register CELL *H asm ("$16");
register CELL *HB asm ("$17");
register choiceptr B asm ("$18");
register yamop *CP asm ("$19");
register CELL *S asm ("$20");
register CELL CreepFlag asm ("$21");
register tr_fr_ptr TR asm ("$22");
EXTERN inline void save_machine_regs(void) {
Yap_REGS.H_ = H;
Yap_REGS.HB_ = HB;
Yap_REGS.B_ = B;
Yap_REGS.CP_ = CP;
Yap_REGS.CreepFlag_ = CreepFlag;
Yap_REGS.TR_ = TR;
}
EXTERN inline void restore_machine_regs(void) {
H = Yap_REGS.H_;
HB = Yap_REGS.HB_;
B = Yap_REGS.B_;
CP = Yap_REGS.CP_;
CreepFlag = Yap_REGS.CreepFlag_;
TR = Yap_REGS.TR_;
}
#define BACKUP_MACHINE_REGS() \
CELL *BK_H = H; \
CELL *BK_HB = HB; \
choiceptr BK_B = B; \
CELL BK_CreepFlag = CreepFlag; \
yamop *BK_CP = CP; \
tr_fr_ptr BK_TR = TR; \
restore_machine_regs()
#define RECOVER_MACHINE_REGS() \
save_machine_regs(); \
H = BK_H; \
HB = BK_HB; \
B = BK_B; \
CreepFlag = BK_CreepFlag; \
CP = BK_CP; \
TR = BK_TR
EXTERN inline void save_H(void) {
Yap_REGS.H_ = H;
}
EXTERN inline void restore_H(void) {
H = Yap_REGS.H_;
}
#define BACKUP_H() CELL *BK_H = H; restore_H()
#define RECOVER_H() save_H(); H = BK_H
EXTERN inline void save_B(void) {
Yap_REGS.B_ = B;
}
EXTERN inline void restore_B(void) {
B = Yap_REGS.B_;
}
#define BACKUP_B() choiceptr BK_B = B; restore_B()
#define RECOVER_B() save_B(); B = BK_B
#elif defined(__GNUC__) && defined(hppa)
#define P Yap_REGS.P_ /* prolog machine program counter */
#define YENV Yap_REGS.YENV_ /* current environment (may differ from ENV) */
register CELL *H asm ("r12");
register CELL *HB asm ("r13");
register choiceptr B asm ("r14");
register yamop *CP asm ("r15");
register CELL *S asm ("r16");
register CELL CreepFlag asm ("r17");
register tr_fr_ptr TR asm ("r18");
EXTERN inline void save_machine_regs(void) {
Yap_REGS.H_ = H;
Yap_REGS.HB_ = HB;
Yap_REGS.B_ = B;
Yap_REGS.CP_ = CP;
Yap_REGS.CreepFlag_ = CreepFlag;
Yap_REGS.TR_ = TR;
}
EXTERN inline void restore_machine_regs(void) {
H = Yap_REGS.H_;
HB = Yap_REGS.HB_;
B = Yap_REGS.B_;
CP = Yap_REGS.CP_;
CreepFlag = Yap_REGS.CreepFlag_;
TR = Yap_REGS.TR_;
}
#define BACKUP_MACHINE_REGS() \
CELL *BK_H = H; \
CELL *BK_HB = HB; \
choiceptr BK_B = B; \
CELL BK_CreepFlag = CreepFlag; \
yamop *BK_CP = CP; \
tr_fr_ptr BK_TR = TR; \
restore_machine_regs()
#define RECOVER_MACHINE_REGS() \
save_machine_regs(); \
H = BK_H; \
HB = BK_HB; \
B = BK_B; \
CreepFlag = BK_CreepFlag; \
CP = BK_CP; \
TR = BK_TR
EXTERN inline void save_H(void) {
Yap_REGS.H_ = H;
}
EXTERN inline void restore_H(void) {
H = Yap_REGS.H_;
}
#define BACKUP_H() CELL *BK_H = H; restore_H()
#define RECOVER_H() save_H(); H = BK_H
EXTERN inline void save_B(void) {
Yap_REGS.B_ = B;
}
EXTERN inline void restore_B(void) {
B = Yap_REGS.B_;
}
#define BACKUP_B() choiceptr BK_B = B; restore_B()
#define RECOVER_B() save_B(); B = BK_B
EXTERN void restore_TR(void);
EXTERN void save_TR(void);
EXTERN inline void save_TR(void) {
Yap_REGS.TR_ = TR;
}
EXTERN inline void restore_TR(void) {
TR = Yap_REGS.TR_;
}
#elif defined(__GNUC__) && defined(_POWER)
/*
Because of a bug in GCC, we should always start from the first available
general register. According to rs6000.h, this is r13 everywhere
except for svr4 machines, where r13 is fixed.
If we don't do so, GCC will generate move multiple instructions for
entering complex functions. These instructions will save and
restore the global registers :-(.
*/
#ifndef __svr4__
register CELL CreepFlag asm ("r13");
#else
register CELL CreepFlag asm ("r21");
#endif
register CELL *H asm ("r14");
register CELL *HB asm ("r15");
register choiceptr B asm ("r16");
register yamop *CP asm ("r17");
register CELL *S asm ("r18");
register CELL *YENV asm ("r19");
register tr_fr_ptr TR asm ("r20");
#define P Yap_REGS.P_ /* prolog machine program counter */
EXTERN inline void save_machine_regs(void) {
Yap_REGS.CreepFlag_ = CreepFlag;
Yap_REGS.H_ = H;
Yap_REGS.HB_ = HB;
Yap_REGS.B_ = B;
Yap_REGS.CP_ = CP;
Yap_REGS.YENV_ = YENV;
Yap_REGS.TR_ = TR;
}
EXTERN inline void restore_machine_regs(void) {
CreepFlag = Yap_REGS.CreepFlag_;
H = Yap_REGS.H_;
HB = Yap_REGS.HB_;
B = Yap_REGS.B_;
CP = Yap_REGS.CP_;
YENV = Yap_REGS.YENV_;
TR = Yap_REGS.TR_;
}
#define BACKUP_MACHINE_REGS() \
CELL *BK_H = H; \
CELL *BK_HB = HB; \
choiceptr BK_B = B; \
CELL BK_CreepFlag = CreepFlag; \
yamop *BK_CP = CP; \
tr_fr_ptr BK_TR = TR; \
restore_machine_regs()
#define RECOVER_MACHINE_REGS() \
save_machine_regs(); \
H = BK_H; \
HB = BK_HB; \
B = BK_B; \
CreepFlag = BK_CreepFlag; \
CP = BK_CP; \
TR = BK_TR
EXTERN inline void save_H(void) {
Yap_REGS.H_ = H;
}
EXTERN inline void restore_H(void) {
H = Yap_REGS.H_;
}
#define BACKUP_H() CELL *BK_H = H; restore_H()
#define RECOVER_H() save_H(); H = BK_H
EXTERN inline void save_B(void) {
Yap_REGS.B_ = B;
}
EXTERN inline void restore_B(void) {
B = Yap_REGS.B_;
}
#define BACKUP_B() choiceptr BK_B = B; restore_B()
#define RECOVER_B() save_B(); B = BK_B
#else
#define CP Yap_REGS.CP_ /* continuation program counter */
#define P Yap_REGS.P_ /* prolog machine program counter */
#define YENV Yap_REGS.YENV_ /* current environment (may differ from ENV) */
#define S Yap_REGS.S_ /* structure pointer */
#define H Yap_REGS.H_ /* top of heap (global) stack */
#define B Yap_REGS.B_ /* latest choice point */
#define TR Yap_REGS.TR_ /* top of trail */
#define HB Yap_REGS.HB_ /* heap (global) stack top at time of latest c.p. */
#define CreepFlag Yap_REGS.CreepFlag_
EXTERN inline void save_machine_regs(void) {
}
EXTERN inline void restore_machine_regs(void) {
}
#define BACKUP_MACHINE_REGS()
#define RECOVER_MACHINE_REGS()
EXTERN inline void save_H(void) {
}
EXTERN inline void restore_H(void) {
}
#define BACKUP_H()
#define RECOVER_H()
EXTERN inline void save_B(void) {
}
EXTERN inline void restore_B(void) {
}
#define BACKUP_B()
#define RECOVER_B()
#endif
#define AuxSp Yap_REGS.AuxSp_
#define AuxTop Yap_REGS.AuxTop_
#define TopB Yap_REGS.TopB_
#define DelayedB Yap_REGS.DelayedB_
#define EX Yap_REGS.EX_
#define DEPTH Yap_REGS.DEPTH_
#if defined(SBA) || defined(TABLING)
#define H_FZ Yap_REGS.H_FZ_
#define B_FZ Yap_REGS.B_FZ_
#define TR_FZ Yap_REGS.TR_FZ_
#endif /* SBA || TABLING */
#if defined(YAPOR) || defined(THREADS)
#define worker_id (Yap_REGS.worker_id_)
#define PP (Yap_REGS.PP_)
#define PREG_ADDR (Yap_REGS.PREG_ADDR_)
#ifdef SBA
#define BSEG Yap_REGS.BSEG_
#define binding_array Yap_REGS.binding_array_
#define sba_offset Yap_REGS.sba_offset_
#define sba_end Yap_REGS.sba_end_
#define sba_size Yap_REGS.sba_size_
#define frame_head Yap_REGS.frame_head_
#define frame_tail Yap_REGS.frame_tail_
#endif /* SBA */
#endif /* YAPOR */
#ifdef COROUTINING
#define DelayedVars Yap_REGS.DelayedVars_
#endif
#define CurrentModule Yap_REGS.CurrentModule_
#define REG_SIZE sizeof(REGS)/sizeof(CELL *)
#define ARG1 XREGS[1]
#define ARG2 XREGS[2]
#define ARG3 XREGS[3]
#define ARG4 XREGS[4]
#define ARG5 XREGS[5]
#define ARG6 XREGS[6]
#define ARG7 XREGS[7]
#define ARG8 XREGS[8]
#define ARG9 XREGS[9]
#define ARG10 XREGS[10]
#define ARG11 XREGS[11]
#define ARG12 XREGS[12]
#define ARG13 XREGS[13]
#define ARG14 XREGS[14]
#define ARG15 XREGS[15]
#define ARG16 XREGS[16]
#define cut_succeed() return( ( B = B->cp_b, 1 ))
#define cut_fail() return( ( B = B->cp_b, 0 ))
/* by default, define HBREG to be HB */
#define HBREG HB
#if defined(SBA) || defined(TABLING)
#define BB Yap_REGS.BB_
#define BBREG BB
#endif /* SBA || TABLING */
#if !THREADS
/* use actual addresses for regs */
#define PRECOMPUTE_REGADDRESS 1
#endif /* THREADS */
/* aggregate several abstract machine operations in a single */
#define AGGREGATE_OPS 1
/* 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 initialise the abstract registers */
REGSTORE Yap_standard_regs;
#endif /* PUSH_REGS */
/******************* controlling debugging ****************************/
static inline UInt
CalculateStackGap(void)
{
UInt gmin = (LCL0-H0)>>3;
if (gmin < MinStackGap) gmin = MinStackGap;
return gmin;
}
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