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/* $Id: config.h,v 1.1 2002/08/28 23:12:42 drh Exp $ */

typedef struct {

        unsigned char max_unaligned_load;

        Symbol (*rmap)(int);

        void (*blkfetch)(int size, int off, int reg, int tmp);

        void (*blkstore)(int size, int off, int reg, int tmp);

        void (*blkloop)(int dreg, int doff,

                         int sreg, int soff,

                         int size, int tmps[]);

        void (*_label)(Node);

        int (*_rule)(void*, int);

        short **_nts;

        void (*_kids)(Node, int, Node*);

        char **_string;

        char **_templates;

        char *_isinstruction;

        char **_ntname;

        void (*emit2)(Node);

        void (*doarg)(Node);

        void (*target)(Node);

        void (*clobber)(Node);

} Xinterface;

extern int     askregvar(Symbol, Symbol);

extern void    blkcopy(int, int, int, int, int, int[]);

extern unsigned emitasm(Node, int);

extern int     getregnum(Node);

extern int     mayrecalc(Node);

extern int     mkactual(int, int);

extern void    mkauto(Symbol);

extern Symbol  mkreg(char *, int, int, int);

extern Symbol  mkwildcard(Symbol *);

extern int     move(Node);

extern int     notarget(Node);

extern void    parseflags(int, char **);

extern int     range(Node, int, int);

extern unsigned regloc(Symbol);  /* omit */

extern void    rtarget(Node, int, Symbol);

extern void    setreg(Node, Symbol);

extern void    spill(unsigned, int, Node);

extern int     widens(Node);

extern int      argoffset, maxargoffset;

extern int      bflag, dflag;

extern int      dalign, salign;

extern int      framesize;

extern unsigned freemask[], usedmask[];

extern int      offset, maxoffset;

extern int      swap;

extern unsigned tmask[], vmask[];

typedef struct {

        unsigned listed:1;

        unsigned registered:1;

        unsigned emitted:1;

        unsigned copy:1;

        unsigned equatable:1;

        unsigned spills:1;

        unsigned mayrecalc:1;

        void *state;

        short inst;

        Node kids[3];

        Node prev, next;

        Node prevuse;

        short argno;

} Xnode;

typedef struct {

        Symbol vbl;

        short set;

        short number;

        unsigned mask;

} *Regnode;

enum { IREG=0, FREG=1 };

typedef struct {

        char *name;

        unsigned int eaddr;  /* omit */

        int offset;

        Node lastuse;

        int usecount;

        Regnode regnode;

        Symbol *wildcard;

} Xsymbol;

enum { RX=2 };

typedef struct {

        int offset;

        unsigned freemask[2];

} Env;

#define LBURG_MAX SHRT_MAX

enum { VREG=(44<<4) };

/* Exported for the front end */

extern void             blockbeg(Env *);

extern void             blockend(Env *);

extern void             emit(Node);

extern Node             gen(Node);

extern unsigned         emitbin(Node, int);

#ifdef NDEBUG

#define debug(x) (void)0

#else

#define debug(x) (void)(dflag&&((x),0))

#endif