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/*
 * h/i386/cc2mch.h
 * Machine specific definitions for final phase
 * of direct to bits C compiler (cc2).
 * i386.
 */

#define	UNCON	ZJMP
#define	ischnrel(rel) (rel!=ZLOOP && rel!=ZLOOPE && rel!=ZLOOPNE && rel!=ZJCXZ)
#define	isrevrel(rel) (rel!=ZJMP && rel!=ZLOOP && rel!=ZLOOPE && rel!=ZLOOPNE && rel!=ZJCXZ)

/*
 * These definitions are used in the opcode table.
 * They tell the coder the style of the instruction.
 */
#define	OF_BYTE		0		/* Byte data			*/
#define	OF_CALL		1		/* Direct call			*/
#define	OF_ICALL	2		/* Indirect call		*/
#define	OF_IN		3		/* In				*/
#define	OF_INH		4		/* Inherent (1 byte)		*/
#define	OF_INH2		5		/* One byte, 0x0A prefix	*/
#define	OF_INT		6		/* Interrupt			*/
#define	OF_JMP		7		/* Jumps			*/
#define	OF_LEA		8		/* Lea, lds, les		*/
#define	OF_REL		9		/* Jcxz, loops			*/
#define	OF_MUL		10		/* Mul and div			*/
#define	OF_MOV		11		/* Moves			*/
#define	OF_NRET		12		/* Return with pop of n		*/
#define	OF_OUT		13		/* Out				*/
#define	OF_POP		14		/* Pop				*/
#define	OF_PUSH		15		/* Push				*/
#define	OF_DOP		16		/* Double operand		*/
#define	OF_SHR		17		/* Shifts			*/
#define	OF_SOP		18		/* Single operand		*/
#define	OF_WORD		19		/* Word data			*/
#define	OF_XCALL	20		/* Cross segment calls		*/
#define	OF_DOPS		21		/* Double op, sw encoding valid	*/
#define	OF_FWAIT	22		/* FWAIT			*/
#define	OF_FRM		23		/* Floating point, standard address */
#define	OF_FD9		24		/* Single byte, D9 prefix	*/
#define	OF_FDE		25		/* Single byte, DE prefix	*/
#define	OF_LPTR		26		/* Local pointer (offset only)	*/
#define	OF_GPTR		27		/* Global pointer (segment and offset) */
#define	OF_FDD		28		/* Single byte, DD prefix	*/
#define	OF_MUL3		29		/* Multiply immediate, 3 operands */
#define	OF_2B		30		/* Two-byte, 0F prefix		*/
#define	OF_LONG		31		/* Long data			*/

#define	is8087op(op)	((op)==OF_FWAIT||(op)==OF_FD9||(op)==OF_FDD||(op)==OF_FDE||(op)==OF_FRM)

/* Flags.  Watch out for OP_JUMP etc. defined in h/cc2.h. */
#define	OP_BYTE		0010		/* Byte instruction	*/
#define	OP_WORD		0020		/* Word instruction	*/
#define	OP_DWORD	0040		/* Dword instruction	*/
#define	OP_NPTR		0100		/* No PTR in output	*/

/* If !EMUFIXUPS, the routines outf[bw]() write an absolute 8087 op. */
#if	!EMUFIXUPS
#define	outfb(b)	outab(b)
#define	outfw(w, pfx)	outaw(w)
#endif

/* Shorthand. */
#define	af_p(ip, n)	(&((ip)->i_af[n]))
#define	MOD(afp)	(((afp)->a_mode) & A_AMOD)
#define	REGM(afp)	(((afp)->a_mode) & A_REGM)
#define	MODRM(afp)	(((afp)->a_mode) & (A_AMOD|A_REGM))

/*
 * Externals.
 */
extern	ival_t	framesize;		/* Size of frame	*/
extern	PREGSET	usedregs;		/* Registers used	*/
extern	int	hasfloat;		/* -VNDP fp code used	*/

/* end of h/i386/cc2mch.h */

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