/* seq.h * Pseudo instruction sequences. * * Copyright (c) 1996, 1997, 2003 *	Transvirtual Technologies, Inc.  All rights reserved. * * See the file "license.terms" for information on usage and redistribution  * of this file.  */#ifndef __seq_hh#define __seq_hh#include "machine.h"struct _sequence;struct _label_;typedef void (*ifunc)(struct _sequence*);/** maximum number of arguments for one sequence */#define	SEQSLOTS		5/** * a struct _sequence is one instruction of the intermediate language of the jitter. * * func    - the function that is able to emit native code for this instruction * u       - parameters for this instruction, their exact meaning depends on func * type    - type of the instruction, one of the T* constants defined in slots.h  * refed   - true iff generation of native code for this instruction is necessary   * lastuse - bitmask of the slots not being accessed after this instruction, bits *           are used as an index into u * next    - pointer to the next instruction following this one * * These intermediate instructions are generated while reading the java bytecode * and are translated into native code afterwards. This translation is done * per basic block rather than per method. */typedef struct _sequence {	ifunc			func;	union {		jvalue		value;		struct _label_* labconst;		Method*		methconst;		struct SlotData** smask;		struct SlotData* slot;	} u[SEQSLOTS];	uint8			type;	uint8			refed;	uint32			lastuse;	jitflags		jflags;	struct _sequence*	next;} sequence;void initSeq(void);sequence* nextSeq(void);/* * These track the pool of sequence objects allcoated by the jitter.  * The set of valid sequence objects is the sublist between firstSeq * and currSeq, exclusive. */extern sequence*		firstSeq;extern sequence*		lastSeq;extern sequence*		currSeq;/* * sequence currently being created (return value of last call to nextSeq). */extern sequence* 		activeSeq;#define	ALLOCSEQNR		1024typedef struct _sequencechunk {	struct _sequencechunk *next;	sequence data[ALLOCSEQNR];} sequencechunk;#define	seq(s)			((s)->insn)/** * Evaluates to a SlotData* parameter of a struct _sequence. * * @param _s the sequence whose parameter is to be returned. * @param _i idx of the parameter. */#define	seq_slot(_s, _i)	((_s)->u[_i].slot)/** * Evaluates to an int parameter of a struct _sequence. * * @param _s the sequence whose parameter is to be returned. * @param _i idx of the parameter. */#define	seq_value(_s, _i)	((_s)->u[_i].value.i)/** * Evaluates to the slot that contains the result of a sequence. * * @param _s the sequence whose destination slot is to be returned. */#define	seq_dst(_s)		seq_slot(_s, 0)/** * Evaluates to the slot that contains the return value of a sequence. *  * @param _s the sequence whose return value is to be returned. */#define	seq_ret(_s)		seq_slot(_s, 0)#endif