119 lines
3.3 KiB
C
119 lines
3.3 KiB
C
/* $Header$ */
|
|
/*
|
|
* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
|
|
* See the copyright notice in the ACK home directory, in the file "Copyright".
|
|
*/
|
|
/*
|
|
* Motorola 68020 dependent C declarations
|
|
*/
|
|
|
|
#define low3(z) ((short)(z) & 07)
|
|
#define low4(z) ((short)(z) & 017)
|
|
#define low5(z) ((short)(z) & 037)
|
|
#define low6(z) ((short)(z) & 077)
|
|
#define low7(z) ((short)(z) & 0177)
|
|
|
|
#define fit3(z) ((((z)-1) & ~((int)07)) == 0)
|
|
#define fit4(z) (((z) & ~((int)017)) == 0)
|
|
#define fit5(z) (((z) & ~((int)037)) == 0)
|
|
#define fit6(z) (((z) & ~((int)077)) == 0)
|
|
#define fit7(z) (((z) & ~((int)0177)) == 0)
|
|
#define sfit7(z) (fit7((z)+64))
|
|
#define fit8(z) (((z) & ~((int)0xFF)) == 0)
|
|
#define fit16(z) (((z) & ~(0xFFFFL)) == 0)
|
|
|
|
#define SIZE_B 0000
|
|
#define SIZE_W 0100
|
|
#define SIZE_L 0200
|
|
#define SIZE_NON 0300
|
|
#define SIZE_DEF SIZE_W
|
|
|
|
#define FSIZE_L 00
|
|
#define FSIZE_S 01
|
|
#define FSIZE_X 02
|
|
#define FSIZE_P 03
|
|
#define FSIZE_W 04
|
|
#define FSIZE_D 05
|
|
#define FSIZE_B 06
|
|
|
|
#define DEF_FP 01000 /* default floating point processor */
|
|
#define DEF_MM 00000 /* default memory management */
|
|
extern int co_id; /* coprocessor id */
|
|
|
|
extern int mrg_1,mrg_2; /* Mode and ReGister */
|
|
extern short ffew_1, ffew_2; /* Full Format Extension Word */
|
|
extern expr_t bd_1,bd_2,od_1,od_2; /* base and outer displacements */
|
|
#ifndef ASLD
|
|
extern valu_t bd_rel1,bd_rel2,od_rel1,od_rel2;
|
|
#endif
|
|
|
|
#ifdef RELOCATION
|
|
#ifdef ASLD
|
|
#define T_EMIT2(a,b,c,d) t_emit2(a,b,c,(valu_t)0)
|
|
#define T_EMIT4(a,b,c,d) t_emit4(a,b,c,(valu_t)0)
|
|
#else ALSD
|
|
#define T_EMIT2(a,b,c,d) t_emit2(a,b,c,(valu_t)d)
|
|
#define T_EMIT4(a,b,c,d) t_emit4(a,b,c,(valu_t)d)
|
|
#endif ASLD
|
|
#else
|
|
#define T_EMIT2(a,b,c,d) t_emit2(a)
|
|
#define T_EMIT4(a,b,c,d) t_emit4(a)
|
|
#endif
|
|
|
|
struct instr_t {
|
|
short i_word; /* word to be emitted */
|
|
#ifdef RELOCATION
|
|
short i_relotype;
|
|
int i_reloinfo;
|
|
valu_t i_relonami;
|
|
#endif
|
|
};
|
|
typedef struct instr_t instr_t;
|
|
extern instr_t instr[30]; /* temporary area for instructions */
|
|
extern instr_t *instrp; /* index into instr[] */
|
|
extern int dot_offset;
|
|
|
|
/* flags used when reading effective addresses */
|
|
#define INDEX 0300
|
|
#define PRE_INDEX 0100
|
|
#define POST_INDEX 0200
|
|
#define DBL_INDEX 0300
|
|
#define PC_MODE 0400
|
|
|
|
/* addressing mode bits */
|
|
#define DTA 0x01
|
|
#define MEM 0x02
|
|
#define CTR 0x04
|
|
#define ALT 0x08
|
|
#define FITB 0x10
|
|
#define FITW 0x20
|
|
#define PUTW 0x40
|
|
#define PUTL 0x80
|
|
|
|
#ifndef extern
|
|
extern short eamode[];
|
|
#else
|
|
short eamode[] = {
|
|
/* 00A */ DTA |ALT,
|
|
/* 01A */ ALT,
|
|
/* 02A */ DTA|MEM|CTR|ALT,
|
|
/* 03A */ DTA|MEM |ALT,
|
|
/* 04A */ DTA|MEM |ALT,
|
|
/* 05A */ DTA|MEM|CTR|ALT|FITW|PUTW, /* if relocation wanted, use 06A */
|
|
/* 06A */ DTA|MEM|CTR|ALT |PUTW, /* relocation handled by ea_1() */
|
|
/* 07x */ 0,
|
|
/* 070 */ DTA|MEM|CTR|ALT|FITW|PUTW | (RELO2)<<8,
|
|
/* 071 */ DTA|MEM|CTR|ALT |PUTL | (RELO4)<<8,
|
|
/* 072 */ DTA|MEM|CTR |FITW|PUTW, /* if relocation wanted, use 073 */
|
|
/* 073 */ DTA|MEM|CTR |PUTW, /* relocation handled by ea_1() */
|
|
/* 074x */ 0,
|
|
/* 074B */ DTA|MEM |FITB|PUTW | (RELO1)<<8,
|
|
/* 074W */ DTA|MEM |FITW|PUTW | (RELO2)<<8,
|
|
/* 074L */ DTA|MEM |PUTL | (RELO4)<<8,
|
|
};
|
|
/* RELO2 had to go with mode 070, because the assembly
|
|
* language programmer can use addresses like
|
|
* '(expression).w', which still have to be relocatable.
|
|
*/
|
|
#endif
|