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/*	@(#)oper.h 1.1 86/02/03 SMI	*/

/*
 * Copyright (c) 1985 by Sun Microsystems, Inc.
 */

/* operand types */
/* T_PCPLUS used inside ins.c only! */
typedef enum { T_NULL=0, T_REG, T_DEFER, T_POSTINC, T_PREDEC, T_DISPL, T_INDEX,
	       T_ABSS, T_ABSL, T_IMMED, T_NORMAL, 
	       T_REGPAIR, T_STRING, T_FLOAT, T_DOUBLE, T_PCPLUS,
		T_REGLIST,T_FREGLIST,T_FCREGLIST
} operand_t;


/* operand structure */
struct oper {
        operand_t type_o :8;	/* operand type info 		*/
        unsigned  flags_o:16,	/* operand flags 		*/
	         reg_o:8,	/* Register subfield value 	*/
		 scale_o:8;	/* index scale factor           */
        struct sym_bkt *sym_o;	/* symbol used for relocation	*/
        struct sym_bkt *sym2_o;	/* symbol used for relocation	*/
#if C2
        struct oper    *nsym_o;	/* chain of users of this symbol */
#endif
	long	value_o;	/* register # for T_REG, offset for T_DISPL */
	long	disp_o; 	/* displacement value for index mode */
	float 	fval_o; 	/* floating-point value for T_FLOAT */
	double 	dval_o; 	/* floating-point value for T_DOUBLE */
	operand_t immed_o ;	/* Type of immediate operand. */
	char * 	stringval_o;	/* string pointer for T_STRING   */
        long disp2_o;		/* displacement value for full index mode */
        unsigned access_o;	/* access bits */
        int	bfoffset_o;	/* bit-field offset modifier    */
        int	bfwidth_o;	/* bit-field width modifier     */

};

/* operand flags */
#define O_WINDEX  1
#define O_LINDEX  2
#define O_COMPLEX 4
#define O_BFLD    010	/* bit field modifier */
/* modifiers for full indexing mode */
#define O_BSUPRESS 020  /* base  supress */
#define O_INDIRECT 040  /* memory indirect */
#define O_POSTINDEX 0100 /* index after indirection */
#define O_PREINDEX 0200 /* index before indirection */
#define O_WDISP    0400 /* word-length displacement */
#define O_LDISP    01000 /* long-length displacement */
#define O_LDISP2   02000 /* long-length 2nd displacement */
#define O_WDISP2   04000 /* word-length 2nd displacement */
/* modifiers for bit fields */
#define O_BFOREG   010000 /* offset field is a register */
#define O_BFWREG   020000 /* width field is a register */
#define O_BDISP    040000 /* byte-length displacement */

struct optree {
    struct oper  *right_t;
    struct oper  *left_t;
    char op_t;
};

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