74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
/*
|
|
* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
|
|
* See the copyright notice in the ACK home directory, in the file "Copyright".
|
|
*/
|
|
#define RCSID1 "$Header$"
|
|
|
|
/*
|
|
* INTEL 80386 C declarations
|
|
*/
|
|
|
|
#define low6(z) (z & 077)
|
|
#define fit6(z) (low6(z) == z)
|
|
|
|
#define ufitb(z) ((unsigned)(z) <= 255)
|
|
|
|
#define IS_R8 0x100
|
|
#define IS_R32 0x200
|
|
#define IS_EXPR 0x400
|
|
#define IS_RSEG 0x800
|
|
|
|
#define is_expr(reg) ((reg)&IS_EXPR)
|
|
#define is_segreg(reg) ((reg)&IS_RSEG)
|
|
#define is_reg(reg) (((reg)&(IS_R8|IS_R32)) != 0)
|
|
#define is_acc(reg) ((reg) != 0 && ((reg)&(IS_R8|IS_R32)) == (reg))
|
|
|
|
struct operand {
|
|
int mod;
|
|
int rm;
|
|
int reg;
|
|
int sib; /* scale-index-base */
|
|
expr_t exp;
|
|
};
|
|
|
|
extern struct operand op_1, op_2;
|
|
|
|
#define mod_1 op_1.mod
|
|
#define mod_2 op_2.mod
|
|
#define rm_1 op_1.rm
|
|
#define rm_2 op_2.rm
|
|
#define reg_1 op_1.reg
|
|
#define reg_2 op_2.reg
|
|
#define sib_1 op_1.sib
|
|
#define sib_2 op_2.sib
|
|
#define exp_1 op_1.exp
|
|
#define exp_2 op_2.exp
|
|
|
|
#ifdef RELOCATION
|
|
extern int rel_1, rel_2;
|
|
#endif
|
|
|
|
#ifndef extern
|
|
extern char regindex_ind[8][8];
|
|
#else
|
|
/* First index is base register; second index is index register;
|
|
sp cannot be an index register.
|
|
For base and index register indirect mode, bp cannot be the
|
|
base register, but this info is not included in this array.
|
|
This can always be handled by using the base and index register with
|
|
displacement mode.
|
|
*/
|
|
char regindex_ind[8][8] = {
|
|
000, 010, 020, 030, -1, 050, 060, 070,
|
|
001, 011, 021, 031, -1, 051, 061, 071,
|
|
002, 012, 022, 032, -1, 052, 062, 072,
|
|
003, 013, 023, 033, -1, 053, 063, 073,
|
|
004, 014, 024, 034, -1, 054, 064, 074,
|
|
005, 015, 025, 035, -1, 055, 065, 075,
|
|
006, 016, 026, 036, -1, 056, 066, 076,
|
|
007, 017, 027, 037, -1, 057, 067, 077,
|
|
};
|
|
#endif
|
|
|
|
extern int address_long INIT(1), operand_long INIT(1);
|