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", | |
49 | "fpiar/fpcr", "fpsr/fpcr", "fpiar-fpcr"}; | |
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 | ||
273 | case 'F': | |
6ba70f64 | 274 | fprintf_filtered (stream, "fp%d", fetch_arg (buffer, place, 3)); |
2fa0b342 DHW |
275 | break; |
276 | ||
277 | case 'O': | |
278 | val = fetch_arg (buffer, place, 6); | |
279 | if (val & 0x20) | |
6ba70f64 | 280 | fprintf_filtered (stream, "%s", reg_names [val & 7]); |
2fa0b342 | 281 | else |
6ba70f64 | 282 | fprintf_filtered (stream, "%d", val); |
2fa0b342 DHW |
283 | break; |
284 | ||
285 | case '+': | |
6ba70f64 | 286 | fprintf_filtered (stream, "%s@+", |
2fa0b342 DHW |
287 | reg_names[fetch_arg (buffer, place, 3) + 8]); |
288 | break; | |
289 | ||
290 | case '-': | |
6ba70f64 | 291 | fprintf_filtered (stream, "%s@-", |
2fa0b342 DHW |
292 | reg_names[fetch_arg (buffer, place, 3) + 8]); |
293 | break; | |
294 | ||
295 | case 'k': | |
296 | if (place == 'k') | |
6ba70f64 | 297 | fprintf_filtered (stream, "{%s}", reg_names[fetch_arg (buffer, place, 3)]); |
2fa0b342 DHW |
298 | else if (place == 'C') |
299 | { | |
300 | val = fetch_arg (buffer, place, 7); | |
301 | if ( val > 63 ) /* This is a signed constant. */ | |
302 | val -= 128; | |
6ba70f64 | 303 | fprintf_filtered (stream, "{#%d}", val); |
2fa0b342 DHW |
304 | } |
305 | else | |
6ba70f64 | 306 | fprintf_filtered(stderr, "Invalid arg format in opcode table: \"%c%c\".", |
2fa0b342 DHW |
307 | *d, place); |
308 | break; | |
309 | ||
310 | case '#': | |
311 | case '^': | |
312 | p1 = buffer + (*d == '#' ? 2 : 4); | |
313 | if (place == 's') | |
314 | val = fetch_arg (buffer, place, 4); | |
315 | else if (place == 'C') | |
316 | val = fetch_arg (buffer, place, 7); | |
317 | else if (place == '8') | |
318 | val = fetch_arg (buffer, place, 3); | |
319 | else if (place == '3') | |
320 | val = fetch_arg (buffer, place, 8); | |
321 | else if (place == 'b') | |
322 | val = NEXTBYTE (p1); | |
323 | else if (place == 'w') | |
324 | val = NEXTWORD (p1); | |
325 | else if (place == 'l') | |
326 | val = NEXTLONG (p1); | |
327 | else | |
6ba70f64 | 328 | fprintf_filtered(stderr, "Invalid arg format in opcode table: \"%c%c\".", |
2fa0b342 | 329 | *d, place); |
6ba70f64 | 330 | fprintf_filtered (stream, "#%d", val); |
2fa0b342 DHW |
331 | break; |
332 | ||
333 | case 'B': | |
334 | if (place == 'b') | |
335 | val = NEXTBYTE (p); | |
b27d2046 | 336 | else if (place == 'B') |
6f34472d | 337 | val = COERCE_SIGNED_CHAR(buffer[1]); |
b27d2046 | 338 | else if (place == 'w' || place == 'W') |
2fa0b342 | 339 | val = NEXTWORD (p); |
b27d2046 | 340 | else if (place == 'l' || place == 'L') |
2fa0b342 DHW |
341 | val = NEXTLONG (p); |
342 | else if (place == 'g') | |
343 | { | |
344 | val = ((char *)buffer)[1]; | |
345 | if (val == 0) | |
346 | val = NEXTWORD (p); | |
347 | else if (val == -1) | |
348 | val = NEXTLONG (p); | |
349 | } | |
350 | else if (place == 'c') | |
351 | { | |
352 | if (buffer[1] & 0x40) /* If bit six is one, long offset */ | |
353 | val = NEXTLONG (p); | |
354 | else | |
355 | val = NEXTWORD (p); | |
356 | } | |
357 | else | |
6ba70f64 | 358 | fprintf_filtered(stderr, "Invalid arg format in opcode table: \"%c%c\".", |
2fa0b342 DHW |
359 | *d, place); |
360 | print_address (addr + val, stream); | |
361 | break; | |
362 | ||
363 | case 'd': | |
364 | val = NEXTWORD (p); | |
6ba70f64 | 365 | fprintf_filtered (stream, "%s@(%d)", |
2fa0b342 DHW |
366 | reg_names[fetch_arg (buffer, place, 3)], val); |
367 | break; | |
368 | ||
369 | case 's': | |
6ba70f64 | 370 | fprintf_filtered (stream, "%s", |
2fa0b342 DHW |
371 | fpcr_names[fetch_arg (buffer, place, 3)]); |
372 | break; | |
373 | ||
374 | case 'I': | |
375 | val = fetch_arg (buffer, 'd', 3); /* Get coprocessor ID... */ | |
376 | if (val != 1) /* Unusual coprocessor ID? */ | |
6ba70f64 | 377 | fprintf_filtered (stream, "(cpid=%d) ", val); |
2fa0b342 DHW |
378 | if (place == 'i') |
379 | p += 2; /* Skip coprocessor extended operands */ | |
380 | break; | |
381 | ||
382 | case '*': | |
383 | case '~': | |
384 | case '%': | |
385 | case ';': | |
386 | case '@': | |
387 | case '!': | |
388 | case '$': | |
389 | case '?': | |
390 | case '/': | |
391 | case '&': | |
392 | ||
393 | if (place == 'd') | |
394 | { | |
395 | val = fetch_arg (buffer, 'x', 6); | |
396 | val = ((val & 7) << 3) + ((val >> 3) & 7); | |
397 | } | |
398 | else | |
399 | val = fetch_arg (buffer, 's', 6); | |
400 | ||
401 | /* Get register number assuming address register. */ | |
402 | regno = (val & 7) + 8; | |
403 | regname = reg_names[regno]; | |
404 | switch (val >> 3) | |
405 | { | |
406 | case 0: | |
6ba70f64 | 407 | fprintf_filtered (stream, "%s", reg_names[val]); |
2fa0b342 DHW |
408 | break; |
409 | ||
410 | case 1: | |
6ba70f64 | 411 | fprintf_filtered (stream, "%s", regname); |
2fa0b342 DHW |
412 | break; |
413 | ||
414 | case 2: | |
6ba70f64 | 415 | fprintf_filtered (stream, "%s@", regname); |
2fa0b342 DHW |
416 | break; |
417 | ||
418 | case 3: | |
6ba70f64 | 419 | fprintf_filtered (stream, "%s@+", regname); |
2fa0b342 DHW |
420 | break; |
421 | ||
422 | case 4: | |
6ba70f64 | 423 | fprintf_filtered (stream, "%s@-", regname); |
2fa0b342 DHW |
424 | break; |
425 | ||
426 | case 5: | |
427 | val = NEXTWORD (p); | |
6ba70f64 | 428 | fprintf_filtered (stream, "%s@(%d)", regname, val); |
2fa0b342 DHW |
429 | break; |
430 | ||
431 | case 6: | |
432 | p = print_indexed (regno, p, addr, stream); | |
433 | break; | |
434 | ||
435 | case 7: | |
436 | switch (val & 7) | |
437 | { | |
438 | case 0: | |
439 | val = NEXTWORD (p); | |
6ba70f64 | 440 | fprintf_filtered (stream, "@#"); |
2fa0b342 DHW |
441 | print_address (val, stream); |
442 | break; | |
443 | ||
444 | case 1: | |
445 | val = NEXTLONG (p); | |
6ba70f64 | 446 | fprintf_filtered (stream, "@#"); |
2fa0b342 DHW |
447 | print_address (val, stream); |
448 | break; | |
449 | ||
450 | case 2: | |
451 | val = NEXTWORD (p); | |
452 | print_address (addr + val, stream); | |
453 | break; | |
454 | ||
455 | case 3: | |
456 | p = print_indexed (-1, p, addr, stream); | |
457 | break; | |
458 | ||
459 | case 4: | |
460 | flt_p = 1; /* Assume it's a float... */ | |
461 | switch( place ) | |
462 | { | |
463 | case 'b': | |
464 | val = NEXTBYTE (p); | |
465 | flt_p = 0; | |
466 | break; | |
467 | ||
468 | case 'w': | |
469 | val = NEXTWORD (p); | |
470 | flt_p = 0; | |
471 | break; | |
472 | ||
473 | case 'l': | |
474 | val = NEXTLONG (p); | |
475 | flt_p = 0; | |
476 | break; | |
477 | ||
478 | case 'f': | |
6ba70f64 | 479 | NEXTSINGLE(flval, p); |
2fa0b342 DHW |
480 | break; |
481 | ||
482 | case 'F': | |
6ba70f64 | 483 | NEXTDOUBLE(flval, p); |
2fa0b342 DHW |
484 | break; |
485 | ||
486 | case 'x': | |
487 | flval = NEXTEXTEND(p); | |
488 | break; | |
489 | ||
490 | case 'p': | |
491 | flval = NEXTPACKED(p); | |
492 | break; | |
493 | ||
494 | default: | |
6ba70f64 | 495 | fprintf_filtered(stderr, "Invalid arg format in opcode table: \"%c%c\".", |
2fa0b342 DHW |
496 | *d, place); |
497 | } | |
498 | if ( flt_p ) /* Print a float? */ | |
6ba70f64 | 499 | fprintf_filtered (stream, "#%g", flval); |
2fa0b342 | 500 | else |
6ba70f64 | 501 | fprintf_filtered (stream, "#%d", val); |
2fa0b342 DHW |
502 | break; |
503 | ||
504 | default: | |
6ba70f64 | 505 | fprintf_filtered (stream, "<invalid address mode 0%o>", (unsigned) val); |
2fa0b342 DHW |
506 | } |
507 | } | |
508 | break; | |
509 | ||
510 | case 'L': | |
511 | case 'l': | |
512 | if (place == 'w') | |
513 | { | |
514 | char doneany; | |
515 | p1 = buffer + 2; | |
516 | val = NEXTWORD (p1); | |
517 | /* Move the pointer ahead if this point is farther ahead | |
518 | than the last. */ | |
519 | p = p1 > p ? p1 : p; | |
520 | if (val == 0) | |
521 | { | |
6ba70f64 | 522 | fputs_filtered ("#0", stream); |
2fa0b342 DHW |
523 | break; |
524 | } | |
525 | if (*d == 'l') | |
526 | { | |
527 | register int newval = 0; | |
528 | for (regno = 0; regno < 16; ++regno) | |
529 | if (val & (0x8000 >> regno)) | |
530 | newval |= 1 << regno; | |
531 | val = newval; | |
532 | } | |
533 | val &= 0xffff; | |
534 | doneany = 0; | |
535 | for (regno = 0; regno < 16; ++regno) | |
536 | if (val & (1 << regno)) | |
537 | { | |
538 | int first_regno; | |
539 | if (doneany) | |
6ba70f64 | 540 | fputs_filtered ("/", stream); |
2fa0b342 | 541 | doneany = 1; |
6ba70f64 | 542 | fprintf_filtered (stream, "%s", reg_names[regno]); |
2fa0b342 DHW |
543 | first_regno = regno; |
544 | while (val & (1 << (regno + 1))) | |
545 | ++regno; | |
546 | if (regno > first_regno) | |
6ba70f64 | 547 | fprintf_filtered (stream, "-%s", reg_names[regno]); |
2fa0b342 DHW |
548 | } |
549 | } | |
550 | else if (place == '3') | |
551 | { | |
552 | /* `fmovem' insn. */ | |
553 | char doneany; | |
554 | val = fetch_arg (buffer, place, 8); | |
555 | if (val == 0) | |
556 | { | |
6ba70f64 | 557 | fputs_filtered ("#0", stream); |
2fa0b342 DHW |
558 | break; |
559 | } | |
560 | if (*d == 'l') | |
561 | { | |
562 | register int newval = 0; | |
563 | for (regno = 0; regno < 8; ++regno) | |
564 | if (val & (0x80 >> regno)) | |
565 | newval |= 1 << regno; | |
566 | val = newval; | |
567 | } | |
568 | val &= 0xff; | |
569 | doneany = 0; | |
570 | for (regno = 0; regno < 8; ++regno) | |
571 | if (val & (1 << regno)) | |
572 | { | |
573 | int first_regno; | |
574 | if (doneany) | |
6ba70f64 | 575 | fputs_filtered ("/", stream); |
2fa0b342 | 576 | doneany = 1; |
6ba70f64 | 577 | fprintf_filtered (stream, "fp%d", regno); |
2fa0b342 DHW |
578 | first_regno = regno; |
579 | while (val & (1 << (regno + 1))) | |
580 | ++regno; | |
581 | if (regno > first_regno) | |
6ba70f64 | 582 | fprintf_filtered (stream, "-fp%d", regno); |
2fa0b342 DHW |
583 | } |
584 | } | |
585 | else | |
6ba70f64 | 586 | goto de_fault; |
2fa0b342 DHW |
587 | break; |
588 | ||
6ba70f64 DZ |
589 | default: de_fault: |
590 | fprintf_filtered(stderr, "Invalid arg format in opcode table: \"%c\".", *d); | |
2fa0b342 DHW |
591 | } |
592 | ||
593 | return (unsigned char *) p; | |
594 | } | |
595 | ||
596 | /* Fetch BITS bits from a position in the instruction specified by CODE. | |
597 | CODE is a "place to put an argument", or 'x' for a destination | |
598 | that is a general address (mode and register). | |
599 | BUFFER contains the instruction. */ | |
600 | ||
601 | static int | |
602 | fetch_arg (buffer, code, bits) | |
603 | unsigned char *buffer; | |
604 | char code; | |
605 | int bits; | |
606 | { | |
5a77e916 | 607 | register int val = 0; |
2fa0b342 DHW |
608 | switch (code) |
609 | { | |
610 | case 's': | |
611 | val = buffer[1]; | |
612 | break; | |
613 | ||
614 | case 'd': /* Destination, for register or quick. */ | |
615 | val = (buffer[0] << 8) + buffer[1]; | |
616 | val >>= 9; | |
617 | break; | |
618 | ||
619 | case 'x': /* Destination, for general arg */ | |
620 | val = (buffer[0] << 8) + buffer[1]; | |
621 | val >>= 6; | |
622 | break; | |
623 | ||
624 | case 'k': | |
625 | val = (buffer[3] >> 4); | |
626 | break; | |
627 | ||
628 | case 'C': | |
629 | val = buffer[3]; | |
630 | break; | |
631 | ||
632 | case '1': | |
633 | val = (buffer[2] << 8) + buffer[3]; | |
634 | val >>= 12; | |
635 | break; | |
636 | ||
637 | case '2': | |
638 | val = (buffer[2] << 8) + buffer[3]; | |
639 | val >>= 6; | |
640 | break; | |
641 | ||
642 | case '3': | |
643 | case 'j': | |
644 | val = (buffer[2] << 8) + buffer[3]; | |
645 | break; | |
646 | ||
647 | case '4': | |
648 | val = (buffer[4] << 8) + buffer[5]; | |
649 | val >>= 12; | |
650 | break; | |
651 | ||
652 | case '5': | |
653 | val = (buffer[4] << 8) + buffer[5]; | |
654 | val >>= 6; | |
655 | break; | |
656 | ||
657 | case '6': | |
658 | val = (buffer[4] << 8) + buffer[5]; | |
659 | break; | |
660 | ||
661 | case '7': | |
662 | val = (buffer[2] << 8) + buffer[3]; | |
663 | val >>= 7; | |
664 | break; | |
665 | ||
666 | case '8': | |
667 | val = (buffer[2] << 8) + buffer[3]; | |
668 | val >>= 10; | |
669 | break; | |
670 | ||
671 | default: | |
672 | abort (); | |
673 | } | |
674 | ||
675 | switch (bits) | |
676 | { | |
677 | case 3: | |
678 | return val & 7; | |
679 | case 4: | |
680 | return val & 017; | |
681 | case 5: | |
682 | return val & 037; | |
683 | case 6: | |
684 | return val & 077; | |
685 | case 7: | |
686 | return val & 0177; | |
687 | case 8: | |
688 | return val & 0377; | |
689 | case 12: | |
690 | return val & 07777; | |
691 | default: | |
692 | abort (); | |
693 | return(0); | |
694 | } | |
695 | } /* fetch_arg() */ | |
696 | ||
697 | /* Print an indexed argument. The base register is BASEREG (-1 for pc). | |
698 | P points to extension word, in buffer. | |
699 | ADDR is the nominal core address of that extension word. */ | |
700 | ||
701 | static unsigned char * | |
702 | print_indexed (basereg, p, addr, stream) | |
703 | int basereg; | |
704 | unsigned char *p; | |
705 | FILE *stream; | |
706 | bfd_vma addr; | |
707 | { | |
708 | register int word; | |
709 | static char *scales[] = {"", "*2", "*4", "*8"}; | |
710 | register int base_disp; | |
711 | register int outer_disp; | |
712 | char buf[40]; | |
713 | ||
714 | word = NEXTWORD (p); | |
715 | ||
716 | /* Generate the text for the index register. | |
717 | Where this will be output is not yet determined. */ | |
718 | sprintf (buf, "[%s.%c%s]", | |
719 | reg_names[(word >> 12) & 0xf], | |
720 | (word & 0x800) ? 'l' : 'w', | |
721 | scales[(word >> 9) & 3]); | |
722 | ||
723 | /* Handle the 68000 style of indexing. */ | |
724 | ||
725 | if ((word & 0x100) == 0) | |
726 | { | |
727 | print_base (basereg, | |
728 | ((word & 0x80) ? word | 0xff00 : word & 0xff) | |
729 | + ((basereg == -1) ? addr : 0), | |
730 | stream); | |
6ba70f64 | 731 | fputs_filtered (buf, stream); |
2fa0b342 DHW |
732 | return p; |
733 | } | |
734 | ||
735 | /* Handle the generalized kind. */ | |
736 | /* First, compute the displacement to add to the base register. */ | |
737 | ||
738 | if (word & 0200) | |
739 | basereg = -2; | |
740 | if (word & 0100) | |
741 | buf[0] = 0; | |
742 | base_disp = 0; | |
743 | switch ((word >> 4) & 3) | |
744 | { | |
745 | case 2: | |
746 | base_disp = NEXTWORD (p); | |
747 | break; | |
748 | case 3: | |
749 | base_disp = NEXTLONG (p); | |
750 | } | |
751 | if (basereg == -1) | |
752 | base_disp += addr; | |
753 | ||
754 | /* Handle single-level case (not indirect) */ | |
755 | ||
756 | if ((word & 7) == 0) | |
757 | { | |
758 | print_base (basereg, base_disp, stream); | |
6ba70f64 | 759 | fputs_filtered (buf, stream); |
2fa0b342 DHW |
760 | return p; |
761 | } | |
762 | ||
763 | /* Two level. Compute displacement to add after indirection. */ | |
764 | ||
765 | outer_disp = 0; | |
766 | switch (word & 3) | |
767 | { | |
768 | case 2: | |
769 | outer_disp = NEXTWORD (p); | |
770 | break; | |
771 | case 3: | |
772 | outer_disp = NEXTLONG (p); | |
773 | } | |
774 | ||
6ba70f64 | 775 | fprintf_filtered (stream, "%d(", outer_disp); |
2fa0b342 DHW |
776 | print_base (basereg, base_disp, stream); |
777 | ||
778 | /* If postindexed, print the closeparen before the index. */ | |
779 | if (word & 4) | |
6ba70f64 | 780 | fprintf_filtered (stream, ")%s", buf); |
2fa0b342 DHW |
781 | /* If preindexed, print the closeparen after the index. */ |
782 | else | |
6ba70f64 | 783 | fprintf_filtered (stream, "%s)", buf); |
2fa0b342 DHW |
784 | |
785 | return p; | |
786 | } | |
787 | ||
788 | /* Print a base register REGNO and displacement DISP, on STREAM. | |
789 | REGNO = -1 for pc, -2 for none (suppressed). */ | |
790 | ||
791 | static void | |
792 | print_base (regno, disp, stream) | |
793 | int regno; | |
794 | int disp; | |
795 | FILE *stream; | |
796 | { | |
797 | if (regno == -2) | |
6ba70f64 | 798 | fprintf_filtered (stream, "%d", disp); |
2fa0b342 | 799 | else if (regno == -1) |
6ba70f64 | 800 | fprintf_filtered (stream, "0x%x", (unsigned) disp); |
2fa0b342 | 801 | else |
6ba70f64 | 802 | fprintf_filtered (stream, "%d(%s)", disp, reg_names[regno]); |
2fa0b342 | 803 | } |