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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 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
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