xref: /csrg-svn/old/as.tahoe/instrs.h (revision 40602)

/*
 *	Copyright (c) 1982 Regents of the University of California
 *	@(#)instrs.h 4.5 6/9/83
 */
/*
 *	Argument data types
 *
 *	If you change these definitions, you must also change the tables
 *	in assizetab.c
 */
#define	TYPB		000	/* byte integer */
#define	TYPW		001	/* word integer */
#define	TYPL		002	/* long integer */
#define	TYPQ		003	/* quad integer */
#define	TYPF		004	/* F float */
#define	TYPD		005	/* D float */
#define	TYPNONE		006	/* when nothing */
#define	TYPLG		3	/* number of bits the above take up */

#define	TYPMASK	((1<<TYPLG)-1)	/* the mask (assumes 2's comp arith) */
/*
 *	Constructors and extractors for argument access kinds and types
 */
#define A_CONS(access, type)	((access) | (type))
#define	A_ACCEXT(consed)	((consed) & (TYPMASK << TYPLG))
#define	A_TYPEXT(consed)	((consed) & TYPMASK)

/*
 * Argument access types used to test validity of operands to operators
 */
#define	ACCR	(1<<TYPLG)			/* read */
#define	ACCW	(2<<TYPLG)			/* write */
#define	ACCB	(4<<TYPLG)			/* branch displacement */
#define	ACCA	(8<<TYPLG)			/* address only */
#define	ACCM	(ACCR | ACCW)			/* modify */
#define	ACCI	(ACCB | ACCR)			/* XFC code */

#define ACCESSMASK	(ACCA | ACCR | ACCW | ACCB)	/* the mask */

/*
 *	Construction of TYPX and ACCX, to make the instrs table
 *	easy to use and read.
 */
/*
 *	For real memory address
 */
#define	A_AB	A_CONS(ACCA, TYPB)
#define	A_AW	A_CONS(ACCA, TYPW)
#define	A_AL	A_CONS(ACCA, TYPL)
#define	A_AQ	A_CONS(ACCA, TYPQ)
#define	A_AF	A_CONS(ACCA, TYPF)
#define	A_AD	A_CONS(ACCA, TYPD)
/*
 *	For branch displacement
 */
#define	A_BB	A_CONS(ACCB, TYPB)
#define	A_BW	A_CONS(ACCB, TYPW)
/*
 *	For modification
 */
#define	A_MB	A_CONS(ACCM, TYPB)
#define	A_MW	A_CONS(ACCM, TYPW)
#define	A_ML	A_CONS(ACCM, TYPL)
#define	A_MF	A_CONS(ACCM, TYPF)
#define	A_MD	A_CONS(ACCM, TYPD)
/*
 *	For reading
 */
#define	A_RB	A_CONS(ACCR, TYPB)
#define	A_RW	A_CONS(ACCR, TYPW)
#define	A_RL	A_CONS(ACCR, TYPL)
#define	A_RQ	A_CONS(ACCR, TYPQ)
#define	A_RF	A_CONS(ACCR, TYPF)
#define	A_RD	A_CONS(ACCR, TYPD)
/*
 *	For writing
 */
#define	A_WB	A_CONS(ACCW, TYPB)
#define	A_WW	A_CONS(ACCW, TYPW)
#define	A_WL	A_CONS(ACCW, TYPL)
#define	A_WQ	A_CONS(ACCW, TYPQ)
#define	A_WF	A_CONS(ACCW, TYPF)
#define	A_WD	A_CONS(ACCW, TYPD)

#ifndef INSTTAB
/*
 *	Define what the entries in the table look like.
 *	This is only used for adb and sdb; not for as.
 */
#define	INSTTAB
struct insttab{
	char	*iname;
	u_char	opcode;
	char	nargs;
	u_char	argtype[6];
} insttab[];

#define OP(name,opcode,nargs,a1,a2,a3,a4,a5,a6) {name,opcode,nargs,a1,a2,a3,a4,a5,a6}

#endif INSTTAB