Commit | Line | Data |
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2fa0b342 | 1 | /* Print m68k instructions for objdump |
d8474a9b | 2 | Copyright (C) 1986, 1987, 1989, 1991 Free Software Foundation, Inc. |
2fa0b342 DHW |
3 | |
4 | ||
5 | This file is part of the binutils. | |
6 | ||
7 | The binutils are free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
d8474a9b | 9 | the Free Software Foundation; either version 2, or (at your option) |
2fa0b342 DHW |
10 | any later version. |
11 | ||
12 | The binutils are distributed in the hope that they will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with the binutils; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
3bdb6bf8 | 21 | |
2a5f387b | 22 | #include "bfd.h" |
2fa0b342 | 23 | #include "sysdep.h" |
17e6f61f | 24 | #include <stdio.h> |
4aa58a0a | 25 | #include "opcode/m68k.h" |
2fa0b342 | 26 | |
6ba70f64 DZ |
27 | #ifndef GDB |
28 | #define fprintf_filtered fprintf | |
29 | #define fputs_filtered fputs | |
30 | #endif | |
31 | ||
6f34472d PB |
32 | /* Sign-extend an (unsigned char). */ |
33 | #if __STDC__ == 1 | |
34 | #define COERCE_SIGNED_CHAR(ch) ((signed char)(ch)) | |
35 | #else | |
36 | #define COERCE_SIGNED_CHAR(ch) ((int)(((ch) ^ 0x80) & 0xFF) - 128) | |
37 | #endif | |
38 | ||
2fa0b342 DHW |
39 | extern void print_address(); |
40 | ||
41 | /* 68k instructions are never longer than this many bytes. */ | |
42 | #define MAXLEN 22 | |
43 | ||
44 | /* Number of elements in the opcode table. */ | |
45 | #define NOPCODES (sizeof m68k_opcodes / sizeof m68k_opcodes[0]) | |
46 | ||
47 | extern char *reg_names[]; | |
48 | char *fpcr_names[] = { "", "fpiar", "fpsr", "fpiar/fpsr", "fpcr", | |
d6b38bfb | 49 | "fpiar/fpcr", "fpsr/fpcr", "fpiar/fpsr/fpcr"}; |
2fa0b342 DHW |
50 | |
51 | char *reg_names[] = {"d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", "a0", "a1", "a2", "a3", "a4", "a5", "fp", "sp", "ps", "pc"}; | |
52 | static unsigned char *print_insn_arg (); | |
53 | static unsigned char *print_indexed (); | |
54 | static void print_base (); | |
55 | static int fetch_arg (); | |
56 | ||
6f34472d | 57 | #define NEXTBYTE(p) (p += 2, COERCE_SIGNED_CHAR(p[-1])) |
2fa0b342 DHW |
58 | |
59 | #define NEXTWORD(p) \ | |
60 | (p += 2, ((((char *)p)[-2]) << 8) + p[-1]) | |
61 | ||
62 | #define NEXTLONG(p) \ | |
63 | (p += 4, (((((p[-4] << 8) + p[-3]) << 8) + p[-2]) << 8) + p[-1]) | |
64 | ||
6ba70f64 DZ |
65 | /* NEXTSINGLE and NEXTDOUBLE handle alignment problems, but not |
66 | * byte-swapping or other float format differences. FIXME! */ | |
67 | ||
68 | union number { | |
69 | double d; | |
70 | float f; | |
71 | char c[10]; | |
72 | }; | |
2fa0b342 | 73 | |
6ba70f64 DZ |
74 | #define NEXTSINGLE(val, p) \ |
75 | { int i; union number u;\ | |
76 | for (i = 0; i < sizeof(float); i++) u.c[i] = *p++; \ | |
77 | val = u.f; } | |
78 | ||
79 | #define NEXTDOUBLE(val, p) \ | |
80 | { int i; union number u;\ | |
81 | for (i = 0; i < sizeof(double); i++) u.c[i] = *p++; \ | |
82 | val = u.d; } | |
2fa0b342 DHW |
83 | |
84 | #define NEXTEXTEND(p) \ | |
85 | (p += 12, 0.0) /* Need a function to convert from extended to double | |
86 | precision... */ | |
87 | ||
88 | #define NEXTPACKED(p) \ | |
89 | (p += 12, 0.0) /* Need a function to convert from packed to double | |
90 | precision. Actually, it's easier to print a | |
91 | packed number than a double anyway, so maybe | |
92 | there should be a special case to handle this... */ | |
93 | \f | |
94 | /* Print the m68k instruction at address MEMADDR in debugged memory, | |
95 | on STREAM. Returns length of the instruction, in bytes. */ | |
96 | ||
97 | int | |
98 | print_insn_m68k(addr, buffer, stream) | |
99 | bfd_vma addr; | |
100 | unsigned char *buffer; | |
101 | FILE *stream; | |
102 | { | |
103 | register unsigned int i; | |
104 | register unsigned char *p; | |
105 | register char *d; | |
106 | register unsigned int bestmask; | |
107 | int best; | |
108 | ||
109 | ||
110 | ||
111 | bestmask = 0; | |
112 | best = -1; | |
113 | for (i = 0; i < NOPCODES; i++) | |
114 | { | |
115 | register unsigned int opcode = m68k_opcodes[i].opcode; | |
116 | register unsigned int match = m68k_opcodes[i].match; | |
117 | if (((0xff & buffer[0] & (match >> 24)) == (0xff & (opcode >> 24))) | |
118 | && ((0xff & buffer[1] & (match >> 16)) == (0xff & (opcode >> 16))) | |
119 | && ((0xff & buffer[2] & (match >> 8)) == (0xff & (opcode >> 8))) | |
120 | && ((0xff & buffer[3] & match) == (0xff & opcode))) | |
121 | { | |
122 | /* Don't use for printout the variants of divul and divsl | |
123 | that have the same register number in two places. | |
124 | The more general variants will match instead. */ | |
125 | for (d = m68k_opcodes[i].args; *d; d += 2) | |
126 | if (d[1] == 'D') | |
127 | break; | |
128 | ||
129 | /* Don't use for printout the variants of most floating | |
130 | point coprocessor instructions which use the same | |
131 | register number in two places, as above. */ | |
132 | if (*d == 0) | |
133 | for (d = m68k_opcodes[i].args; *d; d += 2) | |
134 | if (d[1] == 't') | |
135 | break; | |
136 | ||
137 | if (*d == 0 && match > bestmask) | |
138 | { | |
139 | best = i; | |
140 | bestmask = match; | |
141 | } | |
142 | } | |
143 | } | |
144 | ||
145 | /* Handle undefined instructions. */ | |
146 | if (best < 0) | |
147 | { | |
6ba70f64 | 148 | fprintf_filtered (stream, "0%o", (unsigned) (buffer[0] << 8) + buffer[1]); |
2fa0b342 DHW |
149 | return 2; |
150 | } | |
151 | ||
6ba70f64 | 152 | fprintf_filtered (stream, "%s", m68k_opcodes[best].name); |
2fa0b342 DHW |
153 | |
154 | /* Point at first word of argument data, | |
155 | and at descriptor for first argument. */ | |
156 | p = buffer + 2; | |
157 | ||
158 | /* Why do this this way? -MelloN */ | |
159 | for (d = m68k_opcodes[best].args; *d; d += 2) | |
160 | { | |
161 | if (d[0] == '#') | |
162 | { | |
163 | if (d[1] == 'l' && p - buffer < 6) | |
164 | p = buffer + 6; | |
165 | else if (p - buffer < 4 && d[1] != 'C' && d[1] != '8' ) | |
166 | p = buffer + 4; | |
167 | } | |
168 | if (d[1] >= '1' && d[1] <= '3' && p - buffer < 4) | |
169 | p = buffer + 4; | |
170 | if (d[1] >= '4' && d[1] <= '6' && p - buffer < 6) | |
171 | p = buffer + 6; | |
172 | if ((d[0] == 'L' || d[0] == 'l') && d[1] == 'w' && p - buffer < 4) | |
173 | p = buffer + 4; | |
174 | } | |
175 | ||
176 | d = m68k_opcodes[best].args; | |
177 | ||
178 | if (*d) | |
6ba70f64 | 179 | fputs_filtered (" ", stream); |
2fa0b342 DHW |
180 | |
181 | while (*d) | |
182 | { | |
183 | p = print_insn_arg (d, buffer, p, addr + p - buffer, stream); | |
184 | d += 2; | |
185 | if (*d && *(d - 2) != 'I' && *d != 'k') | |
6ba70f64 | 186 | fputs_filtered (",", stream); |
2fa0b342 DHW |
187 | } |
188 | return p - buffer; | |
189 | } | |
190 | ||
191 | static unsigned char * | |
192 | print_insn_arg (d, buffer, p, addr, stream) | |
193 | char *d; | |
194 | unsigned char *buffer; | |
195 | register unsigned char *p; | |
196 | bfd_vma addr; /* PC for this arg to be relative to */ | |
197 | FILE *stream; | |
198 | { | |
5a77e916 | 199 | register int val = 0; |
2fa0b342 DHW |
200 | register int place = d[1]; |
201 | int regno; | |
202 | register char *regname; | |
203 | register unsigned char *p1; | |
5a77e916 | 204 | register double flval = 0; |
2fa0b342 DHW |
205 | int flt_p; |
206 | ||
207 | switch (*d) | |
208 | { | |
209 | case 'C': | |
6ba70f64 | 210 | fprintf_filtered (stream, "ccr"); |
2fa0b342 DHW |
211 | break; |
212 | ||
213 | case 'S': | |
6ba70f64 | 214 | fprintf_filtered (stream, "sr"); |
2fa0b342 DHW |
215 | break; |
216 | ||
217 | case 'U': | |
6ba70f64 | 218 | fprintf_filtered (stream, "usp"); |
2fa0b342 DHW |
219 | break; |
220 | ||
221 | case 'J': | |
222 | { | |
223 | static struct { char *name; int value; } names[] | |
224 | = {{"sfc", 0x000}, {"dfc", 0x001}, {"cacr", 0x002}, | |
225 | {"usp", 0x800}, {"vbr", 0x801}, {"caar", 0x802}, | |
226 | {"msp", 0x803}, {"isp", 0x804}}; | |
227 | ||
228 | val = fetch_arg (buffer, place, 12); | |
229 | for (regno = sizeof names / sizeof names[0] - 1; regno >= 0; regno--) | |
230 | if (names[regno].value == val) | |
231 | { | |
6ba70f64 | 232 | fprintf_filtered (stream, names[regno].name); |
2fa0b342 DHW |
233 | break; |
234 | } | |
235 | if (regno < 0) | |
6ba70f64 | 236 | fprintf_filtered (stream, "%d", val); |
2fa0b342 DHW |
237 | } |
238 | break; | |
239 | ||
240 | case 'Q': | |
241 | val = fetch_arg (buffer, place, 3); | |
6ba70f64 DZ |
242 | /* 0 means 8, except for the bkpt instruction... */ |
243 | if (val == 0 && d[1] != 's') | |
244 | val = 8; | |
245 | fprintf_filtered (stream, "#%d", val); | |
2fa0b342 DHW |
246 | break; |
247 | ||
248 | case 'M': | |
249 | val = fetch_arg (buffer, place, 8); | |
250 | if (val & 0x80) | |
251 | val = val - 0x100; | |
6ba70f64 | 252 | fprintf_filtered (stream, "#%d", val); |
2fa0b342 DHW |
253 | break; |
254 | ||
255 | case 'T': | |
256 | val = fetch_arg (buffer, place, 4); | |
6ba70f64 | 257 | fprintf_filtered (stream, "#%d", val); |
2fa0b342 DHW |
258 | break; |
259 | ||
260 | case 'D': | |
6ba70f64 | 261 | fprintf_filtered (stream, "%s", reg_names[fetch_arg (buffer, place, 3)]); |
2fa0b342 DHW |
262 | break; |
263 | ||
264 | case 'A': | |
6ba70f64 | 265 | fprintf_filtered (stream, "%s", |
2fa0b342 DHW |
266 | reg_names[fetch_arg (buffer, place, 3) + 010]); |
267 | break; | |
268 | ||
269 | case 'R': | |
6ba70f64 | 270 | fprintf_filtered (stream, "%s", reg_names[fetch_arg (buffer, place, 4)]); |
2fa0b342 DHW |
271 | break; |
272 | ||
1090c41e ILT |
273 | case 'r': |
274 | fprintf_filtered (stream, "%s@", reg_names[fetch_arg (buffer, place, 4)]); | |
275 | break; | |
276 | ||
2fa0b342 | 277 | case 'F': |
6ba70f64 | 278 | fprintf_filtered (stream, "fp%d", fetch_arg (buffer, place, 3)); |
2fa0b342 DHW |
279 | break; |
280 | ||
281 | case 'O': | |
282 | val = fetch_arg (buffer, place, 6); | |
283 | if (val & 0x20) | |
6ba70f64 | 284 | fprintf_filtered (stream, "%s", reg_names [val & 7]); |
2fa0b342 | 285 | else |
6ba70f64 | 286 | fprintf_filtered (stream, "%d", val); |
2fa0b342 DHW |
287 | break; |
288 | ||
289 | case '+': | |
6ba70f64 | 290 | fprintf_filtered (stream, "%s@+", |
2fa0b342 DHW |
291 | reg_names[fetch_arg (buffer, place, 3) + 8]); |
292 | break; | |
293 | ||
294 | case '-': | |
6ba70f64 | 295 | fprintf_filtered (stream, "%s@-", |
2fa0b342 DHW |
296 | reg_names[fetch_arg (buffer, place, 3) + 8]); |
297 | break; | |
298 | ||
299 | case 'k': | |
300 | if (place == 'k') | |
6ba70f64 | 301 | fprintf_filtered (stream, "{%s}", reg_names[fetch_arg (buffer, place, 3)]); |
2fa0b342 DHW |
302 | else if (place == 'C') |
303 | { | |
304 | val = fetch_arg (buffer, place, 7); | |
305 | if ( val > 63 ) /* This is a signed constant. */ | |
306 | val -= 128; | |
6ba70f64 | 307 | fprintf_filtered (stream, "{#%d}", val); |
2fa0b342 DHW |
308 | } |
309 | else | |
6ba70f64 | 310 | fprintf_filtered(stderr, "Invalid arg format in opcode table: \"%c%c\".", |
2fa0b342 DHW |
311 | *d, place); |
312 | break; | |
313 | ||
314 | case '#': | |
315 | case '^': | |
316 | p1 = buffer + (*d == '#' ? 2 : 4); | |
317 | if (place == 's') | |
318 | val = fetch_arg (buffer, place, 4); | |
319 | else if (place == 'C') | |
320 | val = fetch_arg (buffer, place, 7); | |
321 | else if (place == '8') | |
322 | val = fetch_arg (buffer, place, 3); | |
323 | else if (place == '3') | |
324 | val = fetch_arg (buffer, place, 8); | |
325 | else if (place == 'b') | |
326 | val = NEXTBYTE (p1); | |
327 | else if (place == 'w') | |
328 | val = NEXTWORD (p1); | |
329 | else if (place == 'l') | |
330 | val = NEXTLONG (p1); | |
331 | else | |
6ba70f64 | 332 | fprintf_filtered(stderr, "Invalid arg format in opcode table: \"%c%c\".", |
2fa0b342 | 333 | *d, place); |
6ba70f64 | 334 | fprintf_filtered (stream, "#%d", val); |
2fa0b342 DHW |
335 | break; |
336 | ||
337 | case 'B': | |
338 | if (place == 'b') | |
339 | val = NEXTBYTE (p); | |
b27d2046 | 340 | else if (place == 'B') |
6f34472d | 341 | val = COERCE_SIGNED_CHAR(buffer[1]); |
b27d2046 | 342 | else if (place == 'w' || place == 'W') |
2fa0b342 | 343 | val = NEXTWORD (p); |
b27d2046 | 344 | else if (place == 'l' || place == 'L') |
2fa0b342 DHW |
345 | val = NEXTLONG (p); |
346 | else if (place == 'g') | |
347 | { | |
348 | val = ((char *)buffer)[1]; | |
349 | if (val == 0) | |
350 | val = NEXTWORD (p); | |
351 | else if (val == -1) | |
352 | val = NEXTLONG (p); | |
353 | } | |
354 | else if (place == 'c') | |
355 | { | |
356 | if (buffer[1] & 0x40) /* If bit six is one, long offset */ | |
357 | val = NEXTLONG (p); | |
358 | else | |
359 | val = NEXTWORD (p); | |
360 | } | |
361 | else | |
6ba70f64 | 362 | fprintf_filtered(stderr, "Invalid arg format in opcode table: \"%c%c\".", |
2fa0b342 DHW |
363 | *d, place); |
364 | print_address (addr + val, stream); | |
365 | break; | |
366 | ||
367 | case 'd': | |
368 | val = NEXTWORD (p); | |
6ba70f64 | 369 | fprintf_filtered (stream, "%s@(%d)", |
2fa0b342 DHW |
370 | reg_names[fetch_arg (buffer, place, 3)], val); |
371 | break; | |
372 | ||
373 | case 's': | |
6ba70f64 | 374 | fprintf_filtered (stream, "%s", |
2fa0b342 DHW |
375 | fpcr_names[fetch_arg (buffer, place, 3)]); |
376 | break; | |
377 | ||
378 | case 'I': | |
379 | val = fetch_arg (buffer, 'd', 3); /* Get coprocessor ID... */ | |
380 | if (val != 1) /* Unusual coprocessor ID? */ | |
6ba70f64 | 381 | fprintf_filtered (stream, "(cpid=%d) ", val); |
2fa0b342 DHW |
382 | if (place == 'i') |
383 | p += 2; /* Skip coprocessor extended operands */ | |
384 | break; | |
385 | ||
386 | case '*': | |
387 | case '~': | |
388 | case '%': | |
389 | case ';': | |
390 | case '@': | |
391 | case '!': | |
392 | case '$': | |
393 | case '?': | |
394 | case '/': | |
395 | case '&': | |
396 | ||
397 | if (place == 'd') | |
398 | { | |
399 | val = fetch_arg (buffer, 'x', 6); | |
400 | val = ((val & 7) << 3) + ((val >> 3) & 7); | |
401 | } | |
402 | else | |
403 | val = fetch_arg (buffer, 's', 6); | |
404 | ||
405 | /* Get register number assuming address register. */ | |
406 | regno = (val & 7) + 8; | |
407 | regname = reg_names[regno]; | |
408 | switch (val >> 3) | |
409 | { | |
410 | case 0: | |
6ba70f64 | 411 | fprintf_filtered (stream, "%s", reg_names[val]); |
2fa0b342 DHW |
412 | break; |
413 | ||
414 | case 1: | |
6ba70f64 | 415 | fprintf_filtered (stream, "%s", regname); |
2fa0b342 DHW |
416 | break; |
417 | ||
418 | case 2: | |
6ba70f64 | 419 | fprintf_filtered (stream, "%s@", regname); |
2fa0b342 DHW |
420 | break; |
421 | ||
422 | case 3: | |
6ba70f64 | 423 | fprintf_filtered (stream, "%s@+", regname); |
2fa0b342 DHW |
424 | break; |
425 | ||
426 | case 4: | |
6ba70f64 | 427 | fprintf_filtered (stream, "%s@-", regname); |
2fa0b342 DHW |
428 | break; |
429 | ||
430 | case 5: | |
431 | val = NEXTWORD (p); | |
6ba70f64 | 432 | fprintf_filtered (stream, "%s@(%d)", regname, val); |
2fa0b342 DHW |
433 | break; |
434 | ||
435 | case 6: | |
436 | p = print_indexed (regno, p, addr, stream); | |
437 | break; | |
438 | ||
439 | case 7: | |
440 | switch (val & 7) | |
441 | { | |
442 | case 0: | |
443 | val = NEXTWORD (p); | |
6ba70f64 | 444 | fprintf_filtered (stream, "@#"); |
2fa0b342 DHW |
445 | print_address (val, stream); |
446 | break; | |
447 | ||
448 | case 1: | |
449 | val = NEXTLONG (p); | |
6ba70f64 | 450 | fprintf_filtered (stream, "@#"); |
2fa0b342 DHW |
451 | print_address (val, stream); |
452 | break; | |
453 | ||
454 | case 2: | |
455 | val = NEXTWORD (p); | |
456 | print_address (addr + val, stream); | |
457 | break; | |
458 | ||
459 | case 3: | |
460 | p = print_indexed (-1, p, addr, stream); | |
461 | break; | |
462 | ||
463 | case 4: | |
464 | flt_p = 1; /* Assume it's a float... */ | |
465 | switch( place ) | |
466 | { | |
467 | case 'b': | |
468 | val = NEXTBYTE (p); | |
469 | flt_p = 0; | |
470 | break; | |
471 | ||
472 | case 'w': | |
473 | val = NEXTWORD (p); | |
474 | flt_p = 0; | |
475 | break; | |
476 | ||
477 | case 'l': | |
478 | val = NEXTLONG (p); | |
479 | flt_p = 0; | |
480 | break; | |
481 | ||
482 | case 'f': | |
6ba70f64 | 483 | NEXTSINGLE(flval, p); |
2fa0b342 DHW |
484 | break; |
485 | ||
486 | case 'F': | |
6ba70f64 | 487 | NEXTDOUBLE(flval, p); |
2fa0b342 DHW |
488 | break; |
489 | ||
490 | case 'x': | |
491 | flval = NEXTEXTEND(p); | |
492 | break; | |
493 | ||
494 | case 'p': | |
495 | flval = NEXTPACKED(p); | |
496 | break; | |
497 | ||
498 | default: | |
6ba70f64 | 499 | fprintf_filtered(stderr, "Invalid arg format in opcode table: \"%c%c\".", |
2fa0b342 DHW |
500 | *d, place); |
501 | } | |
502 | if ( flt_p ) /* Print a float? */ | |
6ba70f64 | 503 | fprintf_filtered (stream, "#%g", flval); |
2fa0b342 | 504 | else |
6ba70f64 | 505 | fprintf_filtered (stream, "#%d", val); |
2fa0b342 DHW |
506 | break; |
507 | ||
508 | default: | |
6ba70f64 | 509 | fprintf_filtered (stream, "<invalid address mode 0%o>", (unsigned) val); |
2fa0b342 DHW |
510 | } |
511 | } | |
512 | break; | |
513 | ||
514 | case 'L': | |
515 | case 'l': | |
516 | if (place == 'w') | |
517 | { | |
518 | char doneany; | |
519 | p1 = buffer + 2; | |
520 | val = NEXTWORD (p1); | |
521 | /* Move the pointer ahead if this point is farther ahead | |
522 | than the last. */ | |
523 | p = p1 > p ? p1 : p; | |
524 | if (val == 0) | |
525 | { | |
6ba70f64 | 526 | fputs_filtered ("#0", stream); |
2fa0b342 DHW |
527 | break; |
528 | } | |
529 | if (*d == 'l') | |
530 | { | |
531 | register int newval = 0; | |
532 | for (regno = 0; regno < 16; ++regno) | |
533 | if (val & (0x8000 >> regno)) | |
534 | newval |= 1 << regno; | |
535 | val = newval; | |
536 | } | |
537 | val &= 0xffff; | |
538 | doneany = 0; | |
539 | for (regno = 0; regno < 16; ++regno) | |
540 | if (val & (1 << regno)) | |
541 | { | |
542 | int first_regno; | |
543 | if (doneany) | |
6ba70f64 | 544 | fputs_filtered ("/", stream); |
2fa0b342 | 545 | doneany = 1; |
6ba70f64 | 546 | fprintf_filtered (stream, "%s", reg_names[regno]); |
2fa0b342 DHW |
547 | first_regno = regno; |
548 | while (val & (1 << (regno + 1))) | |
549 | ++regno; | |
550 | if (regno > first_regno) | |
6ba70f64 | 551 | fprintf_filtered (stream, "-%s", reg_names[regno]); |
2fa0b342 DHW |
552 | } |
553 | } | |
554 | else if (place == '3') | |
555 | { | |
556 | /* `fmovem' insn. */ | |
557 | char doneany; | |
558 | val = fetch_arg (buffer, place, 8); | |
559 | if (val == 0) | |
560 | { | |
6ba70f64 | 561 | fputs_filtered ("#0", stream); |
2fa0b342 DHW |
562 | break; |
563 | } | |
564 | if (*d == 'l') | |
565 | { | |
566 | register int newval = 0; | |
567 | for (regno = 0; regno < 8; ++regno) | |
568 | if (val & (0x80 >> regno)) | |
569 | newval |= 1 << regno; | |
570 | val = newval; | |
571 | } | |
572 | val &= 0xff; | |
573 | doneany = 0; | |
574 | for (regno = 0; regno < 8; ++regno) | |
575 | if (val & (1 << regno)) | |
576 | { | |
577 | int first_regno; | |
578 | if (doneany) | |
6ba70f64 | 579 | fputs_filtered ("/", stream); |
2fa0b342 | 580 | doneany = 1; |
6ba70f64 | 581 | fprintf_filtered (stream, "fp%d", regno); |
2fa0b342 DHW |
582 | first_regno = regno; |
583 | while (val & (1 << (regno + 1))) | |
584 | ++regno; | |
585 | if (regno > first_regno) | |
6ba70f64 | 586 | fprintf_filtered (stream, "-fp%d", regno); |
2fa0b342 DHW |
587 | } |
588 | } | |
589 | else | |
6ba70f64 | 590 | goto de_fault; |
2fa0b342 DHW |
591 | break; |
592 | ||
6ba70f64 DZ |
593 | default: de_fault: |
594 | fprintf_filtered(stderr, "Invalid arg format in opcode table: \"%c\".", *d); | |
2fa0b342 DHW |
595 | } |
596 | ||
597 | return (unsigned char *) p; | |
598 | } | |
599 | ||
600 | /* Fetch BITS bits from a position in the instruction specified by CODE. | |
601 | CODE is a "place to put an argument", or 'x' for a destination | |
602 | that is a general address (mode and register). | |
603 | BUFFER contains the instruction. */ | |
604 | ||
605 | static int | |
606 | fetch_arg (buffer, code, bits) | |
607 | unsigned char *buffer; | |
608 | char code; | |
609 | int bits; | |
610 | { | |
5a77e916 | 611 | register int val = 0; |
2fa0b342 DHW |
612 | switch (code) |
613 | { | |
614 | case 's': | |
615 | val = buffer[1]; | |
616 | break; | |
617 | ||
618 | case 'd': /* Destination, for register or quick. */ | |
619 | val = (buffer[0] << 8) + buffer[1]; | |
620 | val >>= 9; | |
621 | break; | |
622 | ||
623 | case 'x': /* Destination, for general arg */ | |
624 | val = (buffer[0] << 8) + buffer[1]; | |
625 | val >>= 6; | |
626 | break; | |
627 | ||
628 | case 'k': | |
629 | val = (buffer[3] >> 4); | |
630 | break; | |
631 | ||
632 | case 'C': | |
633 | val = buffer[3]; | |
634 | break; | |
635 | ||
636 | case '1': | |
637 | val = (buffer[2] << 8) + buffer[3]; | |
638 | val >>= 12; | |
639 | break; | |
640 | ||
641 | case '2': | |
642 | val = (buffer[2] << 8) + buffer[3]; | |
643 | val >>= 6; | |
644 | break; | |
645 | ||
646 | case '3': | |
647 | case 'j': | |
648 | val = (buffer[2] << 8) + buffer[3]; | |
649 | break; | |
650 | ||
651 | case '4': | |
652 | val = (buffer[4] << 8) + buffer[5]; | |
653 | val >>= 12; | |
654 | break; | |
655 | ||
656 | case '5': | |
657 | val = (buffer[4] << 8) + buffer[5]; | |
658 | val >>= 6; | |
659 | break; | |
660 | ||
661 | case '6': | |
662 | val = (buffer[4] << 8) + buffer[5]; | |
663 | break; | |
664 | ||
665 | case '7': | |
666 | val = (buffer[2] << 8) + buffer[3]; | |
667 | val >>= 7; | |
668 | break; | |
669 | ||
670 | case '8': | |
671 | val = (buffer[2] << 8) + buffer[3]; | |
672 | val >>= 10; | |
673 | break; | |
674 | ||
675 | default: | |
676 | abort (); | |
677 | } | |
678 | ||
679 | switch (bits) | |
680 | { | |
681 | case 3: | |
682 | return val & 7; | |
683 | case 4: | |
684 | return val & 017; | |
685 | case 5: | |
686 | return val & 037; | |
687 | case 6: | |
688 | return val & 077; | |
689 | case 7: | |
690 | return val & 0177; | |
691 | case 8: | |
692 | return val & 0377; | |
693 | case 12: | |
694 | return val & 07777; | |
695 | default: | |
696 | abort (); | |
697 | return(0); | |
698 | } | |
699 | } /* fetch_arg() */ | |
700 | ||
701 | /* Print an indexed argument. The base register is BASEREG (-1 for pc). | |
702 | P points to extension word, in buffer. | |
703 | ADDR is the nominal core address of that extension word. */ | |
704 | ||
705 | static unsigned char * | |
706 | print_indexed (basereg, p, addr, stream) | |
707 | int basereg; | |
708 | unsigned char *p; | |
709 | FILE *stream; | |
710 | bfd_vma addr; | |
711 | { | |
712 | register int word; | |
713 | static char *scales[] = {"", "*2", "*4", "*8"}; | |
714 | register int base_disp; | |
715 | register int outer_disp; | |
716 | char buf[40]; | |
717 | ||
718 | word = NEXTWORD (p); | |
719 | ||
720 | /* Generate the text for the index register. | |
721 | Where this will be output is not yet determined. */ | |
722 | sprintf (buf, "[%s.%c%s]", | |
723 | reg_names[(word >> 12) & 0xf], | |
724 | (word & 0x800) ? 'l' : 'w', | |
725 | scales[(word >> 9) & 3]); | |
726 | ||
727 | /* Handle the 68000 style of indexing. */ | |
728 | ||
729 | if ((word & 0x100) == 0) | |
730 | { | |
731 | print_base (basereg, | |
732 | ((word & 0x80) ? word | 0xff00 : word & 0xff) | |
733 | + ((basereg == -1) ? addr : 0), | |
734 | stream); | |
6ba70f64 | 735 | fputs_filtered (buf, stream); |
2fa0b342 DHW |
736 | return p; |
737 | } | |
738 | ||
739 | /* Handle the generalized kind. */ | |
740 | /* First, compute the displacement to add to the base register. */ | |
741 | ||
742 | if (word & 0200) | |
743 | basereg = -2; | |
744 | if (word & 0100) | |
745 | buf[0] = 0; | |
746 | base_disp = 0; | |
747 | switch ((word >> 4) & 3) | |
748 | { | |
749 | case 2: | |
750 | base_disp = NEXTWORD (p); | |
751 | break; | |
752 | case 3: | |
753 | base_disp = NEXTLONG (p); | |
754 | } | |
755 | if (basereg == -1) | |
756 | base_disp += addr; | |
757 | ||
758 | /* Handle single-level case (not indirect) */ | |
759 | ||
760 | if ((word & 7) == 0) | |
761 | { | |
762 | print_base (basereg, base_disp, stream); | |
6ba70f64 | 763 | fputs_filtered (buf, stream); |
2fa0b342 DHW |
764 | return p; |
765 | } | |
766 | ||
767 | /* Two level. Compute displacement to add after indirection. */ | |
768 | ||
769 | outer_disp = 0; | |
770 | switch (word & 3) | |
771 | { | |
772 | case 2: | |
773 | outer_disp = NEXTWORD (p); | |
774 | break; | |
775 | case 3: | |
776 | outer_disp = NEXTLONG (p); | |
777 | } | |
778 | ||
6ba70f64 | 779 | fprintf_filtered (stream, "%d(", outer_disp); |
2fa0b342 DHW |
780 | print_base (basereg, base_disp, stream); |
781 | ||
782 | /* If postindexed, print the closeparen before the index. */ | |
783 | if (word & 4) | |
6ba70f64 | 784 | fprintf_filtered (stream, ")%s", buf); |
2fa0b342 DHW |
785 | /* If preindexed, print the closeparen after the index. */ |
786 | else | |
6ba70f64 | 787 | fprintf_filtered (stream, "%s)", buf); |
2fa0b342 DHW |
788 | |
789 | return p; | |
790 | } | |
791 | ||
792 | /* Print a base register REGNO and displacement DISP, on STREAM. | |
793 | REGNO = -1 for pc, -2 for none (suppressed). */ | |
794 | ||
795 | static void | |
796 | print_base (regno, disp, stream) | |
797 | int regno; | |
798 | int disp; | |
799 | FILE *stream; | |
800 | { | |
801 | if (regno == -2) | |
6ba70f64 | 802 | fprintf_filtered (stream, "%d", disp); |
2fa0b342 | 803 | else if (regno == -1) |
6ba70f64 | 804 | fprintf_filtered (stream, "0x%x", (unsigned) disp); |
2fa0b342 | 805 | else |
6ba70f64 | 806 | fprintf_filtered (stream, "%d(%s)", disp, reg_names[regno]); |
2fa0b342 | 807 | } |