75 lines
2 KiB
C
75 lines
2 KiB
C
/*
|
|
* (c) copyright 1990 by the Vrije Universiteit, Amsterdam, The Netherlands.
|
|
* See the copyright notice in the ACK home directory, in the file "Copyright".
|
|
*/
|
|
#define RCSID1 "$Id$"
|
|
|
|
/*
|
|
* VAX-11 Machine dependent C declarations
|
|
*/
|
|
|
|
/* Addressing modes */
|
|
|
|
#define REG_MODE 5
|
|
#define REGDEF_MODE 6
|
|
#define AI_MODE 8
|
|
#define AI_DEF_MODE 9
|
|
#define AD_MODE 7
|
|
#define DISPLB_MODE 10
|
|
#define DISPLW_MODE 12
|
|
#define DISPLL_MODE 14
|
|
#define DISPLB_DEF_MODE 11
|
|
#define DISPLW_DEF_MODE 13
|
|
#define DISPLL_DEF_MODE 15
|
|
#define INDEX_MODE 4
|
|
|
|
#define DISPL 16 /* not an addressing mode; used for branch
|
|
displacement addressing
|
|
*/
|
|
#define ABS 17 /* absolute mode (only for internal use) */
|
|
#define IMM 18 /* immediate mode (only for internal use) */
|
|
#define REL 19 /* relative mode (only for internal use) */
|
|
#define REL_DEF 20 /* relative deferred mode (only for internal
|
|
use)
|
|
*/
|
|
|
|
/* Some mnemonics used in mach5.c */
|
|
|
|
#define PC 15 /* program counter */
|
|
#define BRB 0x11 /* opcode of branch with byte offset */
|
|
#define BRW 0x31 /* opcode of branch with word offset */
|
|
#define JMP 0x17 /* opcode of jmp instruction */
|
|
|
|
/* Test if a constant is suitable for literal mode */
|
|
|
|
#define literal(z) (((z) & ~(int)0x3f) == 0)
|
|
|
|
/* Declarations for operands */
|
|
|
|
struct operand {
|
|
expr_t exp;
|
|
int mode; /* addressing mode */
|
|
int reg; /* register used in addressing mode */
|
|
int relo; /* index in relocation table for exp */
|
|
int size; /* size as imposed by instruction
|
|
-1 indicates bit-field (no immediate mode
|
|
allowed)
|
|
-2 indicates address (no register mode
|
|
or immediate mode allowed)
|
|
*/
|
|
int index_reg; /* for indexed mode contains index reg,
|
|
-1 if not index mode
|
|
*/
|
|
};
|
|
|
|
extern struct operand opnd[6]; /* maximum number of operands of a VAX
|
|
instruction is 6
|
|
*/
|
|
extern int op_ind; /* index in opng array */
|
|
|
|
/* VAX4 Specific instructions */
|
|
void branch(int opc, expr_t exp);
|
|
void ext_branch(int opc, expr_t exp);
|
|
void operands(void);
|
|
|