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60bcf0fa NC |
1 | /* tc-m68hc11.c -- Assembler code for the Motorola 68HC11 & 68HC12. |
2 | Copyright (C) 1999, 2000 Free Software Foundation. | |
3 | Written by Stephane Carrez (stcarrez@worldnet.fr) | |
4 | ||
5 | This file is part of GAS, the GNU Assembler. | |
6 | ||
7 | GAS is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GAS is distributed in the hope that it 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 GAS; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include <stdio.h> | |
23 | #include <ctype.h> | |
24 | #include "as.h" | |
25 | #include "subsegs.h" | |
26 | #include "opcode/m68hc11.h" | |
27 | #include "dwarf2dbg.h" | |
28 | ||
60bcf0fa NC |
29 | const char comment_chars[] = ";!"; |
30 | const char line_comment_chars[] = "#*"; | |
31 | const char line_separator_chars[] = ""; | |
32 | ||
33 | const char EXP_CHARS[] = "eE"; | |
34 | const char FLT_CHARS[] = "dD"; | |
35 | ||
36 | #define STATE_CONDITIONAL_BRANCH (1) | |
37 | #define STATE_PC_RELATIVE (2) | |
38 | #define STATE_INDEXED_OFFSET (3) | |
39 | #define STATE_XBCC_BRANCH (4) | |
40 | #define STATE_CONDITIONAL_BRANCH_6812 (5) | |
41 | ||
42 | #define STATE_BYTE (0) | |
43 | #define STATE_BITS5 (0) | |
44 | #define STATE_WORD (1) | |
45 | #define STATE_BITS9 (1) | |
46 | #define STATE_LONG (2) | |
47 | #define STATE_BITS16 (2) | |
48 | #define STATE_UNDF (3) /* Symbol undefined in pass1 */ | |
49 | ||
50 | /* This macro has no side-effects. */ | |
51 | #define ENCODE_RELAX(what,length) (((what) << 2) + (length)) | |
52 | ||
53 | #define IS_OPCODE(C1,C2) (((C1) & 0x0FF) == ((C2) & 0x0FF)) | |
54 | ||
55 | /* This table describes how you change sizes for the various types of variable | |
56 | size expressions. This version only supports two kinds. */ | |
57 | ||
58 | /* The fields are: | |
fafb6d17 NC |
59 | How far Forward this mode will reach. |
60 | How far Backward this mode will reach. | |
61 | How many bytes this mode will add to the size of the frag. | |
62 | Which mode to go to if the offset won't fit in this one. */ | |
63 | ||
64 | relax_typeS md_relax_table[] = | |
65 | { | |
66 | {1, 1, 0, 0}, /* First entries aren't used. */ | |
67 | {1, 1, 0, 0}, /* For no good reason except. */ | |
68 | {1, 1, 0, 0}, /* that the VAX doesn't either. */ | |
60bcf0fa NC |
69 | {1, 1, 0, 0}, |
70 | ||
71 | /* Relax for bcc <L>. | |
72 | These insns are translated into b!cc +3 jmp L. */ | |
73 | {(127), (-128), 0, ENCODE_RELAX (STATE_CONDITIONAL_BRANCH, STATE_WORD)}, | |
74 | {0, 0, 3, 0}, | |
75 | {1, 1, 0, 0}, | |
76 | {1, 1, 0, 0}, | |
77 | ||
78 | /* Relax for bsr <L> and bra <L>. | |
79 | These insns are translated into jsr and jmp. */ | |
80 | {(127), (-128), 0, ENCODE_RELAX (STATE_PC_RELATIVE, STATE_WORD)}, | |
81 | {0, 0, 1, 0}, | |
82 | {1, 1, 0, 0}, | |
83 | {1, 1, 0, 0}, | |
84 | ||
85 | /* Relax for indexed offset: 5-bits, 9-bits, 16-bits. */ | |
86 | {(15), (-16), 0, ENCODE_RELAX (STATE_INDEXED_OFFSET, STATE_BITS9)}, | |
87 | {(255), (-256), 1, ENCODE_RELAX (STATE_INDEXED_OFFSET, STATE_BITS16)}, | |
88 | {0, 0, 1, 0}, | |
89 | {1, 1, 0, 0}, | |
90 | ||
91 | /* Relax for dbeq/ibeq/tbeq r,<L>: | |
92 | These insns are translated into db!cc +3 jmp L. */ | |
93 | {(255), (-256), 0, ENCODE_RELAX (STATE_XBCC_BRANCH, STATE_WORD)}, | |
94 | {0, 0, 3, 0}, | |
95 | {1, 1, 0, 0}, | |
96 | {1, 1, 0, 0}, | |
97 | ||
98 | /* Relax for bcc <L> on 68HC12. | |
99 | These insns are translated into lbcc <L>. */ | |
100 | {(127), (-128), 0, ENCODE_RELAX (STATE_CONDITIONAL_BRANCH_6812, STATE_WORD)}, | |
101 | {0, 0, 2, 0}, | |
102 | {1, 1, 0, 0}, | |
103 | {1, 1, 0, 0}, | |
104 | ||
105 | }; | |
106 | ||
107 | /* 68HC11 and 68HC12 registers. They are numbered according to the 68HC12. */ | |
108 | typedef enum register_id | |
109 | { | |
110 | REG_NONE = -1, | |
111 | REG_A = 0, | |
112 | REG_B = 1, | |
113 | REG_CCR = 2, | |
114 | REG_D = 4, | |
115 | REG_X = 5, | |
116 | REG_Y = 6, | |
117 | REG_SP = 7, | |
118 | REG_PC = 8 | |
119 | } register_id; | |
120 | ||
121 | typedef struct operand | |
122 | { | |
123 | expressionS exp; | |
124 | register_id reg1; | |
125 | register_id reg2; | |
126 | int mode; | |
127 | } operand; | |
128 | ||
129 | struct m68hc11_opcode_def | |
130 | { | |
131 | long format; | |
132 | int min_operands; | |
133 | int max_operands; | |
134 | int nb_modes; | |
135 | int used; | |
136 | struct m68hc11_opcode *opcode; | |
137 | }; | |
138 | ||
139 | static struct m68hc11_opcode_def *m68hc11_opcode_defs = 0; | |
140 | static int m68hc11_nb_opcode_defs = 0; | |
141 | ||
142 | typedef struct alias | |
143 | { | |
144 | const char *name; | |
145 | const char *alias; | |
146 | } | |
147 | alias; | |
148 | ||
fafb6d17 NC |
149 | static alias alias_opcodes[] = |
150 | { | |
60bcf0fa NC |
151 | {"cpd", "cmpd"}, |
152 | {"cpx", "cmpx"}, | |
153 | {"cpy", "cmpy"}, | |
154 | {0, 0} | |
155 | }; | |
156 | ||
fafb6d17 NC |
157 | /* Local functions. */ |
158 | static register_id reg_name_search PARAMS ((char *)); | |
159 | static register_id register_name PARAMS ((void)); | |
160 | static int check_range PARAMS ((long, int)); | |
60bcf0fa | 161 | static void print_opcode_list PARAMS ((void)); |
60bcf0fa | 162 | static void get_default_target PARAMS ((void)); |
fafb6d17 NC |
163 | static void print_insn_format PARAMS ((char *)); |
164 | static int get_operand PARAMS ((operand *, int, long)); | |
165 | static void fixup8 PARAMS ((expressionS *, int, int)); | |
166 | static void fixup16 PARAMS ((expressionS *, int, int)); | |
60bcf0fa | 167 | static struct m68hc11_opcode *find_opcode |
fafb6d17 | 168 | PARAMS ((struct m68hc11_opcode_def *, operand *, int *)); |
60bcf0fa | 169 | static void build_jump_insn |
fafb6d17 NC |
170 | PARAMS ((struct m68hc11_opcode *, operand *, int, int)); |
171 | static void build_insn | |
172 | PARAMS ((struct m68hc11_opcode *, operand *, int)); | |
60bcf0fa NC |
173 | |
174 | /* Controls whether relative branches can be turned into long branches. | |
175 | When the relative offset is too large, the insn are changed: | |
176 | bra -> jmp | |
177 | bsr -> jsr | |
178 | bcc -> b!cc +3 | |
179 | jmp L | |
180 | dbcc -> db!cc +3 | |
181 | jmp L | |
fafb6d17 | 182 | |
60bcf0fa NC |
183 | Setting the flag forbidds this. */ |
184 | static short flag_fixed_branchs = 0; | |
185 | ||
186 | /* Force to use long jumps (absolute) instead of relative branches. */ | |
187 | static short flag_force_long_jumps = 0; | |
188 | ||
189 | /* Change the direct addressing mode into an absolute addressing mode | |
190 | when the insn does not support direct addressing. | |
191 | For example, "clr *ZD0" is normally not possible and is changed | |
192 | into "clr ZDO". */ | |
193 | static short flag_strict_direct_addressing = 1; | |
194 | ||
195 | /* When an opcode has invalid operand, print out the syntax of the opcode | |
196 | to stderr. */ | |
197 | static short flag_print_insn_syntax = 0; | |
198 | ||
199 | /* Dumps the list of instructions with syntax and then exit: | |
200 | 1 -> Only dumps the list (sorted by name) | |
201 | 2 -> Generate an example (or test) that can be compiled. */ | |
202 | static short flag_print_opcodes = 0; | |
203 | ||
204 | /* Opcode hash table. */ | |
205 | static struct hash_control *m68hc11_hash; | |
206 | ||
207 | /* Current cpu (either cpu6811 or cpu6812). This is determined automagically | |
208 | by 'get_default_target' by looking at default BFD vector. This is overriden | |
209 | with the -m<cpu> option. */ | |
210 | static int current_architecture = 0; | |
211 | ||
212 | /* Default cpu determined by 'get_default_target'. */ | |
213 | static const char *default_cpu; | |
214 | ||
215 | /* Number of opcodes in the sorted table (filtered by current cpu). */ | |
216 | static int num_opcodes; | |
217 | ||
218 | /* The opcodes sorted by name and filtered by current cpu. */ | |
219 | static struct m68hc11_opcode *m68hc11_sorted_opcodes; | |
220 | ||
221 | /* These are the machine dependent pseudo-ops. These are included so | |
222 | the assembler can work on the output from the SUN C compiler, which | |
223 | generates these. */ | |
224 | ||
225 | /* This table describes all the machine specific pseudo-ops the assembler | |
226 | has to support. The fields are: | |
227 | pseudo-op name without dot | |
228 | function to call to execute this pseudo-op | |
229 | Integer arg to pass to the function. */ | |
fafb6d17 NC |
230 | const pseudo_typeS md_pseudo_table[] = |
231 | { | |
60bcf0fa NC |
232 | /* The following pseudo-ops are supported for MRI compatibility. */ |
233 | {"fcb", cons, 1}, | |
234 | {"fdb", cons, 2}, | |
235 | {"fcc", stringer, 1}, | |
236 | {"rmb", s_space, 0}, | |
237 | {"file", dwarf2_directive_file, 0}, | |
238 | {"loc", dwarf2_directive_loc, 0}, | |
239 | ||
240 | {0, 0, 0} | |
241 | }; | |
60bcf0fa NC |
242 | \f |
243 | /* Options and initialization. */ | |
244 | ||
245 | CONST char *md_shortopts = "Sm:"; | |
246 | ||
fafb6d17 NC |
247 | struct option md_longopts[] = |
248 | { | |
60bcf0fa NC |
249 | #define OPTION_FORCE_LONG_BRANCH (OPTION_MD_BASE) |
250 | {"force-long-branchs", no_argument, NULL, OPTION_FORCE_LONG_BRANCH}, | |
251 | ||
252 | #define OPTION_SHORT_BRANCHS (OPTION_MD_BASE + 1) | |
253 | {"short-branchs", no_argument, NULL, OPTION_SHORT_BRANCHS}, | |
254 | ||
255 | #define OPTION_STRICT_DIRECT_MODE (OPTION_MD_BASE + 2) | |
256 | {"strict-direct-mode", no_argument, NULL, OPTION_STRICT_DIRECT_MODE}, | |
257 | ||
258 | #define OPTION_PRINT_INSN_SYNTAX (OPTION_MD_BASE + 3) | |
259 | {"print-insn-syntax", no_argument, NULL, OPTION_PRINT_INSN_SYNTAX}, | |
260 | ||
261 | #define OPTION_PRINT_OPCODES (OPTION_MD_BASE + 4) | |
262 | {"print-opcodes", no_argument, NULL, OPTION_PRINT_OPCODES}, | |
263 | ||
264 | #define OPTION_GENERATE_EXAMPLE (OPTION_MD_BASE + 5) | |
265 | {"generate-example", no_argument, NULL, OPTION_GENERATE_EXAMPLE}, | |
266 | ||
267 | {NULL, no_argument, NULL, 0} | |
268 | }; | |
269 | size_t md_longopts_size = sizeof (md_longopts); | |
270 | ||
271 | /* Get the target cpu for the assembler. This is based on the configure | |
272 | options and on the -m68hc11/-m68hc12 option. If no option is specified, | |
273 | we must get the default. */ | |
274 | const char * | |
275 | m68hc11_arch_format () | |
276 | { | |
277 | get_default_target (); | |
278 | if (current_architecture & cpu6811) | |
279 | return "elf32-m68hc11"; | |
280 | else | |
281 | return "elf32-m68hc12"; | |
282 | } | |
283 | ||
284 | enum bfd_architecture | |
285 | m68hc11_arch () | |
286 | { | |
287 | get_default_target (); | |
288 | if (current_architecture & cpu6811) | |
289 | return bfd_arch_m68hc11; | |
290 | else | |
291 | return bfd_arch_m68hc12; | |
292 | } | |
293 | ||
294 | int | |
295 | m68hc11_mach () | |
296 | { | |
297 | return 0; | |
298 | } | |
299 | ||
60bcf0fa NC |
300 | void |
301 | md_show_usage (stream) | |
302 | FILE *stream; | |
303 | { | |
304 | get_default_target (); | |
305 | fprintf (stream, _("\ | |
306 | Motorola 68HC11/68HC12 options:\n\ | |
307 | -m68hc11 | -m68hc12 specify the processor [default %s]\n\ | |
308 | --force-long-branchs always turn relative branchs into absolute ones\n\ | |
309 | -S,--short-branchs do not turn relative branchs into absolute ones\n\ | |
310 | when the offset is out of range\n\ | |
311 | --strict-direct-mode do not turn the direct mode into extended mode\n\ | |
312 | when the instruction does not support direct mode\n\ | |
313 | --print-insn-syntax print the syntax of instruction in case of error\n\ | |
314 | --print-opcodes print the list of instructions with syntax\n\ | |
315 | --generate-example generate an example of each instruction\n\ | |
316 | (used for testing)\n"), default_cpu); | |
317 | ||
318 | } | |
319 | ||
320 | /* Try to identify the default target based on the BFD library. */ | |
321 | static void | |
322 | get_default_target () | |
323 | { | |
324 | const bfd_target *target; | |
325 | bfd abfd; | |
326 | ||
327 | if (current_architecture != 0) | |
328 | return; | |
329 | ||
330 | default_cpu = "unknown"; | |
331 | target = bfd_find_target (0, &abfd); | |
332 | if (target && target->name) | |
333 | { | |
334 | if (strcmp (target->name, "elf32-m68hc12") == 0) | |
335 | { | |
336 | current_architecture = cpu6812; | |
337 | default_cpu = "m68hc12"; | |
338 | } | |
339 | else if (strcmp (target->name, "elf32-m68hc11") == 0) | |
340 | { | |
341 | current_architecture = cpu6811; | |
342 | default_cpu = "m68hc11"; | |
343 | } | |
344 | else | |
345 | { | |
346 | as_bad (_("Default target `%s' is not supported."), target->name); | |
347 | } | |
348 | } | |
349 | } | |
350 | ||
351 | void | |
352 | m68hc11_print_statistics (file) | |
353 | FILE *file; | |
354 | { | |
355 | int i; | |
356 | struct m68hc11_opcode_def *opc; | |
357 | ||
358 | hash_print_statistics (file, "opcode table", m68hc11_hash); | |
359 | ||
360 | opc = m68hc11_opcode_defs; | |
361 | if (opc == 0 || m68hc11_nb_opcode_defs == 0) | |
362 | return; | |
363 | ||
364 | /* Dump the opcode statistics table. */ | |
365 | fprintf (file, _("Name # Modes Min ops Max ops Modes mask # Used\n")); | |
366 | for (i = 0; i < m68hc11_nb_opcode_defs; i++, opc++) | |
367 | { | |
368 | fprintf (file, "%-7.7s %5d %7d %7d 0x%08lx %7d\n", | |
369 | opc->opcode->name, | |
370 | opc->nb_modes, | |
371 | opc->min_operands, opc->max_operands, opc->format, opc->used); | |
372 | } | |
373 | } | |
374 | ||
375 | int | |
376 | md_parse_option (c, arg) | |
377 | int c; | |
378 | char *arg; | |
379 | { | |
380 | get_default_target (); | |
381 | switch (c) | |
382 | { | |
383 | /* -S means keep external to 2 bits offset rather than 16 bits one. */ | |
384 | case OPTION_SHORT_BRANCHS: | |
385 | case 'S': | |
386 | flag_fixed_branchs = 1; | |
387 | break; | |
388 | ||
389 | case OPTION_FORCE_LONG_BRANCH: | |
390 | flag_force_long_jumps = 1; | |
391 | break; | |
392 | ||
393 | case OPTION_PRINT_INSN_SYNTAX: | |
394 | flag_print_insn_syntax = 1; | |
395 | break; | |
396 | ||
397 | case OPTION_PRINT_OPCODES: | |
398 | flag_print_opcodes = 1; | |
399 | break; | |
400 | ||
401 | case OPTION_STRICT_DIRECT_MODE: | |
402 | flag_strict_direct_addressing = 0; | |
403 | break; | |
404 | ||
405 | case OPTION_GENERATE_EXAMPLE: | |
406 | flag_print_opcodes = 2; | |
407 | break; | |
408 | ||
409 | case 'm': | |
410 | if (strcasecmp (arg, "68hc11") == 0) | |
411 | current_architecture = cpu6811; | |
412 | else if (strcasecmp (arg, "68hc12") == 0) | |
413 | current_architecture = cpu6812; | |
414 | else | |
415 | as_bad (_("Option `%s' is not recognized."), arg); | |
416 | break; | |
417 | ||
418 | default: | |
419 | return 0; | |
420 | } | |
421 | ||
422 | return 1; | |
423 | } | |
424 | \f | |
425 | symbolS * | |
426 | md_undefined_symbol (name) | |
427 | char *name ATTRIBUTE_UNUSED; | |
428 | { | |
429 | return 0; | |
430 | } | |
431 | ||
fafb6d17 | 432 | /* Equal to MAX_PRECISION in atof-ieee.c. */ |
60bcf0fa NC |
433 | #define MAX_LITTLENUMS 6 |
434 | ||
435 | /* Turn a string in input_line_pointer into a floating point constant | |
bc0d738a NC |
436 | of type TYPE, and store the appropriate bytes in *LITP. The number |
437 | of LITTLENUMS emitted is stored in *SIZEP. An error message is | |
60bcf0fa | 438 | returned, or NULL on OK. */ |
60bcf0fa NC |
439 | char * |
440 | md_atof (type, litP, sizeP) | |
441 | char type; | |
442 | char *litP; | |
443 | int *sizeP; | |
444 | { | |
445 | int prec; | |
446 | LITTLENUM_TYPE words[MAX_LITTLENUMS]; | |
447 | LITTLENUM_TYPE *wordP; | |
448 | char *t; | |
449 | ||
450 | switch (type) | |
451 | { | |
452 | case 'f': | |
453 | case 'F': | |
454 | case 's': | |
455 | case 'S': | |
456 | prec = 2; | |
457 | break; | |
458 | ||
459 | case 'd': | |
460 | case 'D': | |
461 | case 'r': | |
462 | case 'R': | |
463 | prec = 4; | |
464 | break; | |
465 | ||
466 | case 'x': | |
467 | case 'X': | |
468 | prec = 6; | |
469 | break; | |
470 | ||
471 | case 'p': | |
472 | case 'P': | |
473 | prec = 6; | |
474 | break; | |
475 | ||
476 | default: | |
477 | *sizeP = 0; | |
478 | return _("Bad call to MD_ATOF()"); | |
479 | } | |
480 | t = atof_ieee (input_line_pointer, type, words); | |
481 | if (t) | |
482 | input_line_pointer = t; | |
483 | ||
484 | *sizeP = prec * sizeof (LITTLENUM_TYPE); | |
485 | for (wordP = words; prec--;) | |
486 | { | |
487 | md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE)); | |
488 | litP += sizeof (LITTLENUM_TYPE); | |
489 | } | |
490 | return 0; | |
491 | } | |
492 | ||
493 | valueT | |
494 | md_section_align (seg, addr) | |
495 | asection *seg; | |
496 | valueT addr; | |
497 | { | |
498 | int align = bfd_get_section_alignment (stdoutput, seg); | |
499 | return ((addr + (1 << align) - 1) & (-1 << align)); | |
500 | } | |
501 | ||
60bcf0fa NC |
502 | static int |
503 | cmp_opcode (op1, op2) | |
504 | struct m68hc11_opcode *op1; | |
505 | struct m68hc11_opcode *op2; | |
506 | { | |
507 | return strcmp (op1->name, op2->name); | |
508 | } | |
509 | ||
510 | /* Initialize the assembler. Create the opcode hash table | |
511 | (sorted on the names) with the M6811 opcode table | |
512 | (from opcode library). */ | |
513 | void | |
514 | md_begin () | |
515 | { | |
516 | char *prev_name = ""; | |
517 | struct m68hc11_opcode *opcodes; | |
518 | struct m68hc11_opcode_def *opc = 0; | |
519 | int i, j; | |
520 | ||
521 | get_default_target (); | |
522 | ||
523 | m68hc11_hash = hash_new (); | |
524 | ||
525 | /* Get a writable copy of the opcode table and sort it on the names. */ | |
526 | opcodes = (struct m68hc11_opcode *) xmalloc (m68hc11_num_opcodes * | |
527 | sizeof (struct | |
528 | m68hc11_opcode)); | |
529 | m68hc11_sorted_opcodes = opcodes; | |
530 | num_opcodes = 0; | |
531 | for (i = 0; i < m68hc11_num_opcodes; i++) | |
532 | { | |
533 | if (m68hc11_opcodes[i].arch & current_architecture) | |
534 | { | |
535 | opcodes[num_opcodes] = m68hc11_opcodes[i]; | |
536 | if (opcodes[num_opcodes].name[0] == 'b' | |
537 | && opcodes[num_opcodes].format & M6811_OP_JUMP_REL | |
538 | && !(opcodes[num_opcodes].format & M6811_OP_BITMASK)) | |
539 | { | |
540 | num_opcodes++; | |
541 | opcodes[num_opcodes] = m68hc11_opcodes[i]; | |
542 | } | |
543 | num_opcodes++; | |
544 | for (j = 0; alias_opcodes[j].name != 0; j++) | |
545 | if (strcmp (m68hc11_opcodes[i].name, alias_opcodes[j].name) == 0) | |
546 | { | |
547 | opcodes[num_opcodes] = m68hc11_opcodes[i]; | |
548 | opcodes[num_opcodes].name = alias_opcodes[j].alias; | |
549 | num_opcodes++; | |
550 | break; | |
551 | } | |
552 | } | |
553 | } | |
554 | qsort (opcodes, num_opcodes, sizeof (struct m68hc11_opcode), cmp_opcode); | |
555 | ||
556 | opc = (struct m68hc11_opcode_def *) | |
557 | xmalloc (num_opcodes * sizeof (struct m68hc11_opcode_def)); | |
558 | m68hc11_opcode_defs = opc--; | |
559 | ||
560 | /* Insert unique names into hash table. The M6811 instruction set | |
561 | has several identical opcode names that have different opcodes based | |
562 | on the operands. This hash table then provides a quick index to | |
563 | the first opcode with a particular name in the opcode table. */ | |
564 | for (i = 0; i < num_opcodes; i++, opcodes++) | |
565 | { | |
566 | int expect; | |
567 | ||
568 | if (strcmp (prev_name, opcodes->name)) | |
569 | { | |
570 | prev_name = (char *) opcodes->name; | |
571 | ||
572 | opc++; | |
573 | opc->format = 0; | |
574 | opc->min_operands = 100; | |
575 | opc->max_operands = 0; | |
576 | opc->nb_modes = 0; | |
577 | opc->opcode = opcodes; | |
578 | opc->used = 0; | |
579 | hash_insert (m68hc11_hash, opcodes->name, (char *) opc); | |
580 | } | |
581 | opc->nb_modes++; | |
582 | opc->format |= opcodes->format; | |
583 | ||
584 | /* See how many operands this opcode needs. */ | |
585 | expect = 0; | |
586 | if (opcodes->format & M6811_OP_MASK) | |
587 | expect++; | |
588 | if (opcodes->format & M6811_OP_BITMASK) | |
589 | expect++; | |
590 | if (opcodes->format & (M6811_OP_JUMP_REL | M6812_OP_JUMP_REL16)) | |
591 | expect++; | |
592 | if (opcodes->format & (M6812_OP_IND16_P2 | M6812_OP_IDX_P2)) | |
593 | expect++; | |
594 | ||
595 | if (expect < opc->min_operands) | |
596 | opc->min_operands = expect; | |
597 | if (expect > opc->max_operands) | |
598 | opc->max_operands = expect; | |
599 | } | |
600 | opc++; | |
601 | m68hc11_nb_opcode_defs = opc - m68hc11_opcode_defs; | |
602 | ||
603 | if (flag_print_opcodes) | |
604 | { | |
605 | print_opcode_list (); | |
606 | exit (EXIT_SUCCESS); | |
607 | } | |
608 | } | |
609 | ||
610 | void | |
611 | m68hc11_init_after_args () | |
612 | { | |
613 | } | |
60bcf0fa NC |
614 | \f |
615 | /* Builtin help. */ | |
616 | ||
617 | /* Return a string that represents the operand format for the instruction. | |
618 | When example is true, this generates an example of operand. This is used | |
619 | to give an example and also to generate a test. */ | |
620 | static char * | |
621 | print_opcode_format (opcode, example) | |
622 | struct m68hc11_opcode *opcode; | |
623 | int example; | |
624 | { | |
625 | static char buf[128]; | |
626 | int format = opcode->format; | |
627 | char *p; | |
628 | ||
629 | p = buf; | |
630 | buf[0] = 0; | |
631 | if (format & M6811_OP_IMM8) | |
632 | { | |
633 | if (example) | |
634 | sprintf (p, "#%d", rand () & 0x0FF); | |
635 | else | |
636 | strcpy (p, _("#<imm8>")); | |
637 | p = &p[strlen (p)]; | |
638 | } | |
639 | ||
640 | if (format & M6811_OP_IMM16) | |
641 | { | |
642 | if (example) | |
643 | sprintf (p, "#%d", rand () & 0x0FFFF); | |
644 | else | |
645 | strcpy (p, _("#<imm16>")); | |
646 | p = &p[strlen (p)]; | |
647 | } | |
648 | ||
649 | if (format & M6811_OP_IX) | |
650 | { | |
651 | if (example) | |
652 | sprintf (p, "%d,X", rand () & 0x0FF); | |
653 | else | |
654 | strcpy (p, _("<imm8>,X")); | |
655 | p = &p[strlen (p)]; | |
656 | } | |
657 | ||
658 | if (format & M6811_OP_IY) | |
659 | { | |
660 | if (example) | |
661 | sprintf (p, "%d,X", rand () & 0x0FF); | |
662 | else | |
663 | strcpy (p, _("<imm8>,X")); | |
664 | p = &p[strlen (p)]; | |
665 | } | |
666 | ||
667 | if (format & M6812_OP_IDX) | |
668 | { | |
669 | if (example) | |
670 | sprintf (p, "%d,X", rand () & 0x0FF); | |
671 | else | |
672 | strcpy (p, "n,r"); | |
673 | p = &p[strlen (p)]; | |
674 | } | |
675 | ||
676 | if (format & M6811_OP_DIRECT) | |
677 | { | |
678 | if (example) | |
679 | sprintf (p, "*Z%d", rand () & 0x0FF); | |
680 | else | |
681 | strcpy (p, _("*<abs8>")); | |
682 | p = &p[strlen (p)]; | |
683 | } | |
684 | ||
685 | if (format & M6811_OP_BITMASK) | |
686 | { | |
687 | if (buf[0]) | |
688 | *p++ = ' '; | |
689 | ||
690 | if (example) | |
691 | sprintf (p, "#$%02x", rand () & 0x0FF); | |
692 | else | |
693 | strcpy (p, _("#<mask>")); | |
694 | ||
695 | p = &p[strlen (p)]; | |
696 | if (format & M6811_OP_JUMP_REL) | |
697 | *p++ = ' '; | |
698 | } | |
699 | ||
700 | if (format & M6811_OP_IND16) | |
701 | { | |
702 | if (example) | |
703 | sprintf (p, _("symbol%d"), rand () & 0x0FF); | |
704 | else | |
705 | strcpy (p, _("<abs>")); | |
706 | ||
707 | p = &p[strlen (p)]; | |
708 | } | |
709 | ||
710 | if (format & (M6811_OP_JUMP_REL | M6812_OP_JUMP_REL16)) | |
711 | { | |
712 | if (example) | |
713 | { | |
714 | if (format & M6811_OP_BITMASK) | |
715 | { | |
716 | sprintf (p, ".+%d", rand () & 0x7F); | |
717 | } | |
718 | else | |
719 | { | |
720 | sprintf (p, "L%d", rand () & 0x0FF); | |
721 | } | |
722 | } | |
723 | else | |
724 | strcpy (p, _("<label>")); | |
725 | } | |
726 | ||
727 | return buf; | |
728 | } | |
729 | ||
730 | /* Prints the list of instructions with the possible operands. */ | |
731 | static void | |
732 | print_opcode_list () | |
733 | { | |
734 | int i; | |
735 | char *prev_name = ""; | |
736 | struct m68hc11_opcode *opcodes; | |
737 | int example = flag_print_opcodes == 2; | |
738 | ||
739 | if (example) | |
fafb6d17 NC |
740 | printf (_("# Example of `%s' instructions\n\t.sect .text\n_start:\n"), |
741 | default_cpu); | |
60bcf0fa NC |
742 | |
743 | opcodes = m68hc11_sorted_opcodes; | |
744 | ||
745 | /* Walk the list sorted on names (by md_begin). We only report | |
746 | one instruction per line, and we collect the different operand | |
747 | formats. */ | |
748 | for (i = 0; i < num_opcodes; i++, opcodes++) | |
749 | { | |
750 | char *fmt = print_opcode_format (opcodes, example); | |
751 | ||
752 | if (example) | |
753 | { | |
754 | printf ("L%d:\t", i); | |
755 | printf ("%s %s\n", opcodes->name, fmt); | |
756 | } | |
757 | else | |
758 | { | |
759 | if (strcmp (prev_name, opcodes->name)) | |
760 | { | |
761 | if (i > 0) | |
762 | printf ("\n"); | |
763 | ||
764 | printf ("%-5.5s ", opcodes->name); | |
765 | prev_name = (char *) opcodes->name; | |
766 | } | |
767 | if (fmt[0]) | |
768 | printf (" [%s]", fmt); | |
769 | } | |
770 | } | |
771 | printf ("\n"); | |
772 | } | |
773 | ||
60bcf0fa NC |
774 | /* Print the instruction format. This operation is called when some |
775 | instruction is not correct. Instruction format is printed as an | |
776 | error message. */ | |
777 | static void | |
778 | print_insn_format (name) | |
779 | char *name; | |
780 | { | |
781 | struct m68hc11_opcode_def *opc; | |
782 | struct m68hc11_opcode *opcode; | |
783 | char buf[128]; | |
784 | ||
785 | opc = (struct m68hc11_opcode_def *) hash_find (m68hc11_hash, name); | |
786 | if (opc == NULL) | |
787 | { | |
788 | as_bad (_("Instruction `%s' is not recognized."), name); | |
789 | return; | |
790 | } | |
791 | opcode = opc->opcode; | |
792 | ||
793 | as_bad (_("Instruction formats for `%s':"), name); | |
794 | do | |
795 | { | |
796 | char *fmt; | |
797 | ||
798 | fmt = print_opcode_format (opcode, 0, 0); | |
799 | sprintf (buf, "\t%-5.5s %s", opcode->name, fmt); | |
800 | ||
801 | as_bad ("%s", buf); | |
802 | opcode++; | |
803 | } | |
804 | while (strcmp (opcode->name, name) == 0); | |
805 | } | |
60bcf0fa NC |
806 | \f |
807 | /* Analysis of 68HC11 and 68HC12 operands. */ | |
808 | ||
809 | /* reg_name_search() finds the register number given its name. | |
810 | Returns the register number or REG_NONE on failure. */ | |
811 | static register_id | |
812 | reg_name_search (name) | |
813 | char *name; | |
814 | { | |
815 | if (strcasecmp (name, "x") == 0 || strcasecmp (name, "ix") == 0) | |
816 | return REG_X; | |
817 | if (strcasecmp (name, "y") == 0 || strcasecmp (name, "iy") == 0) | |
818 | return REG_Y; | |
819 | if (strcasecmp (name, "a") == 0) | |
820 | return REG_A; | |
821 | if (strcasecmp (name, "b") == 0) | |
822 | return REG_B; | |
823 | if (strcasecmp (name, "d") == 0) | |
824 | return REG_D; | |
825 | if (strcasecmp (name, "sp") == 0) | |
826 | return REG_SP; | |
827 | if (strcasecmp (name, "pc") == 0) | |
828 | return REG_PC; | |
829 | if (strcasecmp (name, "ccr") == 0) | |
830 | return REG_CCR; | |
831 | ||
832 | return REG_NONE; | |
833 | } | |
834 | ||
835 | static char * | |
836 | skip_whites (p) | |
837 | char *p; | |
838 | { | |
839 | while (*p == ' ' || *p == '\t') | |
840 | p++; | |
841 | ||
842 | return p; | |
843 | } | |
844 | ||
fafb6d17 | 845 | /* Check the string at input_line_pointer |
60bcf0fa NC |
846 | to see if it is a valid register name. */ |
847 | static register_id | |
848 | register_name () | |
849 | { | |
850 | register_id reg_number; | |
851 | char c, *p = input_line_pointer; | |
852 | ||
853 | if (!is_name_beginner (*p++)) | |
854 | return REG_NONE; | |
855 | ||
856 | while (is_part_of_name (*p++)) | |
857 | continue; | |
858 | ||
859 | c = *--p; | |
860 | if (c) | |
861 | *p++ = 0; | |
862 | ||
fafb6d17 | 863 | /* Look to see if it's in the register table. */ |
60bcf0fa NC |
864 | reg_number = reg_name_search (input_line_pointer); |
865 | if (reg_number != REG_NONE) | |
866 | { | |
867 | if (c) | |
868 | *--p = c; | |
869 | ||
870 | input_line_pointer = p; | |
871 | return reg_number; | |
872 | } | |
873 | if (c) | |
874 | *--p = c; | |
875 | ||
876 | return reg_number; | |
877 | } | |
878 | ||
fafb6d17 | 879 | /* Parse a string of operands and return an array of expressions. |
60bcf0fa NC |
880 | |
881 | Operand mode[0] mode[1] exp[0] exp[1] | |
882 | #n M6811_OP_IMM16 - O_* | |
883 | *<exp> M6811_OP_DIRECT - O_* | |
884 | .{+-}<exp> M6811_OP_JUMP_REL - O_* | |
885 | <exp> M6811_OP_IND16 - O_* | |
886 | ,r N,r M6812_OP_IDX M6812_OP_REG O_constant O_register | |
887 | n,-r M6812_PRE_DEC M6812_OP_REG O_constant O_register | |
888 | n,+r M6812_PRE_INC " " | |
889 | n,r- M6812_POST_DEC " " | |
890 | n,r+ M6812_POST_INC " " | |
891 | A,r B,r D,r M6811_OP_REG M6812_OP_REG O_register O_register | |
892 | [D,r] M6811_OP_IDX_2 M6812_OP_REG O_register O_register | |
fafb6d17 | 893 | [n,r] M6811_OP_IDX_1 M6812_OP_REG O_constant O_register */ |
60bcf0fa NC |
894 | static int |
895 | get_operand (oper, which, opmode) | |
896 | operand *oper; | |
897 | int which; | |
898 | long opmode; | |
899 | { | |
900 | char *p = input_line_pointer; | |
901 | int mode; | |
902 | register_id reg; | |
903 | ||
904 | oper->exp.X_op = O_absent; | |
905 | oper->reg1 = REG_NONE; | |
906 | oper->reg2 = REG_NONE; | |
907 | mode = M6811_OP_NONE; | |
908 | ||
909 | p = skip_whites (p); | |
910 | ||
911 | if (*p == 0 || *p == '\n' || *p == '\r') | |
912 | { | |
913 | input_line_pointer = p; | |
914 | return 0; | |
915 | } | |
916 | ||
917 | if (*p == '*' && (opmode & (M6811_OP_DIRECT | M6811_OP_IND16))) | |
918 | { | |
919 | mode = M6811_OP_DIRECT; | |
920 | p++; | |
921 | } | |
922 | else if (*p == '#') | |
923 | { | |
924 | if (!(opmode & (M6811_OP_IMM8 | M6811_OP_IMM16 | M6811_OP_BITMASK))) | |
925 | { | |
926 | as_bad (_("Immediate operand is not allowed for operand %d."), | |
fafb6d17 | 927 | which); |
60bcf0fa NC |
928 | return -1; |
929 | } | |
930 | ||
931 | mode = M6811_OP_IMM16; | |
932 | p++; | |
933 | if (strncmp (p, "%hi", 3) == 0) | |
934 | { | |
935 | p += 3; | |
936 | mode |= M6811_OP_HIGH_ADDR; | |
937 | } | |
938 | else if (strncmp (p, "%lo", 3) == 0) | |
939 | { | |
940 | p += 3; | |
941 | mode |= M6811_OP_LOW_ADDR; | |
942 | } | |
943 | } | |
944 | else if (*p == '.' && (p[1] == '+' || p[1] == '-')) | |
945 | { | |
946 | p++; | |
947 | mode = M6811_OP_JUMP_REL; | |
948 | } | |
949 | else if (*p == '[') | |
950 | { | |
951 | if (current_architecture & cpu6811) | |
952 | as_bad (_("Indirect indexed addressing is not valid for 68HC11.")); | |
953 | ||
954 | p++; | |
955 | mode = M6812_OP_IDX_2; | |
956 | p = skip_whites (p); | |
957 | } | |
958 | else if (*p == ',') /* Special handling of ,x and ,y. */ | |
959 | { | |
960 | p++; | |
961 | input_line_pointer = p; | |
962 | ||
963 | reg = register_name (); | |
964 | if (reg != REG_NONE) | |
965 | { | |
966 | oper->reg1 = reg; | |
967 | oper->exp.X_op = O_constant; | |
968 | oper->exp.X_add_number = 0; | |
969 | oper->mode = M6812_OP_IDX; | |
970 | return 1; | |
971 | } | |
972 | as_bad (_("Spurious `,' or bad indirect register addressing mode.")); | |
973 | return -1; | |
974 | } | |
975 | input_line_pointer = p; | |
976 | ||
977 | if (mode == M6811_OP_NONE || mode == M6812_OP_IDX_2) | |
978 | reg = register_name (); | |
979 | else | |
980 | reg = REG_NONE; | |
981 | ||
982 | if (reg != REG_NONE) | |
983 | { | |
984 | p = skip_whites (input_line_pointer); | |
985 | if (*p == ']' && mode == M6812_OP_IDX_2) | |
986 | { | |
987 | as_bad | |
988 | (_("Missing second register or offset for indexed-indirect mode.")); | |
989 | return -1; | |
990 | } | |
991 | ||
992 | oper->reg1 = reg; | |
993 | oper->mode = mode | M6812_OP_REG; | |
994 | if (*p != ',') | |
995 | { | |
996 | if (mode == M6812_OP_IDX_2) | |
997 | { | |
998 | as_bad (_("Missing second register for indexed-indirect mode.")); | |
999 | return -1; | |
1000 | } | |
1001 | return 1; | |
1002 | } | |
1003 | ||
1004 | p++; | |
1005 | input_line_pointer = p; | |
1006 | reg = register_name (); | |
1007 | if (reg != REG_NONE) | |
1008 | { | |
1009 | p = skip_whites (input_line_pointer); | |
1010 | if (mode == M6812_OP_IDX_2) | |
1011 | { | |
1012 | if (*p != ']') | |
1013 | { | |
1014 | as_bad (_("Missing `]' to close indexed-indirect mode.")); | |
1015 | return -1; | |
1016 | } | |
1017 | p++; | |
1018 | } | |
1019 | input_line_pointer = p; | |
1020 | ||
1021 | oper->reg2 = reg; | |
1022 | return 1; | |
1023 | } | |
1024 | return 1; | |
1025 | } | |
1026 | ||
1027 | /* In MRI mode, isolate the operand because we can't distinguish | |
1028 | operands from comments. */ | |
1029 | if (flag_mri) | |
1030 | { | |
1031 | char c = 0; | |
1032 | ||
1033 | p = skip_whites (p); | |
1034 | while (*p && *p != ' ' && *p != '\t') | |
1035 | p++; | |
1036 | ||
1037 | if (*p) | |
1038 | { | |
1039 | c = *p; | |
1040 | *p = 0; | |
1041 | } | |
1042 | ||
1043 | /* Parse as an expression. */ | |
1044 | expression (&oper->exp); | |
1045 | ||
1046 | if (c) | |
1047 | { | |
1048 | *p = c; | |
1049 | } | |
1050 | } | |
1051 | else | |
1052 | { | |
1053 | expression (&oper->exp); | |
1054 | } | |
1055 | ||
1056 | if (oper->exp.X_op == O_illegal) | |
1057 | { | |
1058 | as_bad (_("Illegal operand.")); | |
1059 | return -1; | |
1060 | } | |
1061 | else if (oper->exp.X_op == O_absent) | |
1062 | { | |
1063 | as_bad (_("Missing operand.")); | |
1064 | return -1; | |
1065 | } | |
1066 | ||
1067 | p = input_line_pointer; | |
1068 | ||
1069 | if (mode == M6811_OP_NONE || mode == M6811_OP_DIRECT | |
1070 | || mode == M6812_OP_IDX_2) | |
1071 | { | |
1072 | p = skip_whites (input_line_pointer); | |
1073 | ||
1074 | if (*p == ',') | |
1075 | { | |
1076 | p++; | |
1077 | ||
1078 | /* 68HC12 pre increment or decrement. */ | |
1079 | if (mode == M6811_OP_NONE) | |
1080 | { | |
1081 | if (*p == '-') | |
1082 | { | |
1083 | mode = M6812_PRE_DEC; | |
1084 | p++; | |
1085 | if (current_architecture & cpu6811) | |
1086 | as_bad (_("Pre-decrement mode is not valid for 68HC11")); | |
1087 | } | |
1088 | else if (*p == '+') | |
1089 | { | |
1090 | mode = M6812_PRE_INC; | |
1091 | p++; | |
1092 | if (current_architecture & cpu6811) | |
1093 | as_bad (_("Pre-increment mode is not valid for 68HC11")); | |
1094 | } | |
1095 | p = skip_whites (p); | |
1096 | } | |
1097 | input_line_pointer = p; | |
1098 | reg = register_name (); | |
1099 | ||
fafb6d17 | 1100 | /* Backtrack. */ |
60bcf0fa NC |
1101 | if (which == 0 && opmode & M6812_OP_IDX_P2 |
1102 | && reg != REG_X && reg != REG_Y | |
1103 | && reg != REG_PC && reg != REG_SP) | |
1104 | { | |
1105 | reg = REG_NONE; | |
1106 | input_line_pointer = p; | |
1107 | } | |
1108 | ||
1109 | if (reg == REG_NONE && mode != M6811_OP_DIRECT | |
1110 | && !(mode == M6811_OP_NONE && opmode & M6811_OP_IND16)) | |
1111 | { | |
1112 | as_bad (_("Wrong register in register indirect mode.")); | |
1113 | return -1; | |
1114 | } | |
1115 | if (mode == M6812_OP_IDX_2) | |
1116 | { | |
1117 | p = skip_whites (input_line_pointer); | |
1118 | if (*p++ != ']') | |
1119 | { | |
1120 | as_bad (_("Missing `]' to close register indirect operand.")); | |
1121 | return -1; | |
1122 | } | |
1123 | input_line_pointer = p; | |
1124 | } | |
1125 | if (reg != REG_NONE) | |
1126 | { | |
1127 | oper->reg1 = reg; | |
1128 | if (mode == M6811_OP_NONE) | |
1129 | { | |
1130 | p = input_line_pointer; | |
1131 | if (*p == '-') | |
1132 | { | |
1133 | mode = M6812_POST_DEC; | |
1134 | p++; | |
1135 | if (current_architecture & cpu6811) | |
1136 | as_bad | |
1137 | (_("Post-decrement mode is not valid for 68HC11.")); | |
1138 | } | |
1139 | else if (*p == '+') | |
1140 | { | |
1141 | mode = M6812_POST_INC; | |
1142 | p++; | |
1143 | if (current_architecture & cpu6811) | |
1144 | as_bad | |
1145 | (_("Post-increment mode is not valid for 68HC11.")); | |
1146 | } | |
1147 | else | |
1148 | mode = M6812_OP_IDX; | |
1149 | ||
1150 | input_line_pointer = p; | |
1151 | } | |
1152 | else | |
1153 | mode |= M6812_OP_IDX; | |
1154 | ||
1155 | oper->mode = mode; | |
1156 | return 1; | |
1157 | } | |
1158 | } | |
1159 | ||
1160 | if (mode == M6812_OP_D_IDX_2) | |
1161 | { | |
1162 | as_bad (_("Invalid indexed indirect mode.")); | |
1163 | return -1; | |
1164 | } | |
1165 | } | |
1166 | ||
1167 | /* If the mode is not known until now, this is either a label | |
1168 | or an indirect address. */ | |
1169 | if (mode == M6811_OP_NONE) | |
fafb6d17 | 1170 | mode = M6811_OP_IND16 | M6811_OP_JUMP_REL; |
60bcf0fa NC |
1171 | |
1172 | p = input_line_pointer; | |
1173 | while (*p == ' ' || *p == '\t') | |
1174 | p++; | |
1175 | input_line_pointer = p; | |
1176 | oper->mode = mode; | |
1177 | ||
1178 | return 1; | |
1179 | } | |
1180 | ||
1181 | #define M6812_AUTO_INC_DEC (M6812_PRE_INC | M6812_PRE_DEC \ | |
1182 | | M6812_POST_INC | M6812_POST_DEC) | |
1183 | ||
1184 | /* Checks that the number 'num' fits for a given mode. */ | |
1185 | static int | |
1186 | check_range (num, mode) | |
1187 | long num; | |
1188 | int mode; | |
1189 | { | |
1190 | /* Auto increment and decrement are ok for [-8..8] without 0. */ | |
1191 | if (mode & M6812_AUTO_INC_DEC) | |
fafb6d17 | 1192 | return (num != 0 && num <= 8 && num >= -8); |
60bcf0fa NC |
1193 | |
1194 | /* The 68HC12 supports 5, 9 and 16-bits offsets. */ | |
1195 | if (mode & (M6812_INDEXED_IND | M6812_INDEXED | M6812_OP_IDX)) | |
fafb6d17 | 1196 | mode = M6811_OP_IND16; |
60bcf0fa NC |
1197 | |
1198 | if (mode & M6812_OP_JUMP_REL16) | |
1199 | mode = M6811_OP_IND16; | |
1200 | ||
1201 | switch (mode) | |
1202 | { | |
1203 | case M6811_OP_IX: | |
1204 | case M6811_OP_IY: | |
1205 | case M6811_OP_DIRECT: | |
1206 | return (num >= 0 && num <= 255) ? 1 : 0; | |
1207 | ||
1208 | case M6811_OP_BITMASK: | |
1209 | case M6811_OP_IMM8: | |
1210 | return (((num & 0xFFFFFF00) == 0) || ((num & 0xFFFFFF00) == 0xFFFFFF00)) | |
1211 | ? 1 : 0; | |
1212 | ||
1213 | case M6811_OP_JUMP_REL: | |
1214 | return (num >= -128 && num <= 127) ? 1 : 0; | |
1215 | ||
1216 | case M6811_OP_IND16: | |
1217 | case M6811_OP_IMM16: | |
1218 | return (((num & 0xFFFF0000) == 0) || ((num & 0xFFFF0000) == 0xFFFF0000)) | |
1219 | ? 1 : 0; | |
1220 | ||
1221 | case M6812_OP_IBCC_MARKER: | |
1222 | case M6812_OP_TBCC_MARKER: | |
1223 | case M6812_OP_DBCC_MARKER: | |
1224 | return (num >= -256 && num <= 255) ? 1 : 0; | |
1225 | ||
1226 | case M6812_OP_TRAP_ID: | |
1227 | return ((num >= 0x30 && num <= 0x39) | |
1228 | || (num >= 0x40 && num <= 0x0ff)) ? 1 : 0; | |
1229 | ||
1230 | default: | |
1231 | return 0; | |
1232 | } | |
1233 | } | |
60bcf0fa NC |
1234 | \f |
1235 | /* Gas fixup generation. */ | |
1236 | ||
1237 | /* Put a 1 byte expression described by 'oper'. If this expression contains | |
1238 | unresolved symbols, generate an 8-bit fixup. */ | |
1239 | static void | |
1240 | fixup8 (oper, mode, opmode) | |
1241 | expressionS *oper; | |
1242 | int mode; | |
1243 | int opmode; | |
1244 | { | |
1245 | char *f; | |
1246 | ||
1247 | f = frag_more (1); | |
1248 | ||
1249 | if (oper->X_op == O_constant) | |
1250 | { | |
1251 | if (mode & M6812_OP_TRAP_ID | |
1252 | && !check_range (oper->X_add_number, M6812_OP_TRAP_ID)) | |
1253 | { | |
1254 | static char trap_id_warn_once = 0; | |
1255 | ||
1256 | as_bad (_("Trap id `%ld' is out of range."), oper->X_add_number); | |
1257 | if (trap_id_warn_once == 0) | |
1258 | { | |
1259 | trap_id_warn_once = 1; | |
1260 | as_bad (_("Trap id must be within [0x30..0x39] or [0x40..0xff].")); | |
1261 | } | |
1262 | } | |
1263 | ||
1264 | if (!(mode & M6812_OP_TRAP_ID) | |
1265 | && !check_range (oper->X_add_number, mode)) | |
1266 | { | |
1267 | as_bad (_("Operand out of 8-bit range: `%ld'."), oper->X_add_number); | |
1268 | } | |
1269 | number_to_chars_bigendian (f, oper->X_add_number & 0x0FF, 1); | |
1270 | } | |
1271 | else if (oper->X_op != O_register) | |
1272 | { | |
1273 | if (mode & M6812_OP_TRAP_ID) | |
1274 | as_bad (_("The trap id must be a constant.")); | |
1275 | ||
1276 | if (mode == M6811_OP_JUMP_REL) | |
1277 | { | |
1278 | fixS *fixp; | |
1279 | ||
1280 | fixp = fix_new_exp (frag_now, f - frag_now->fr_literal, 1, | |
1281 | oper, true, BFD_RELOC_8_PCREL); | |
1282 | fixp->fx_pcrel_adjust = 1; | |
1283 | } | |
1284 | else | |
1285 | { | |
1286 | /* Now create an 8-bit fixup. If there was some %hi or %lo | |
1287 | modifier, generate the reloc accordingly. */ | |
1288 | fix_new_exp (frag_now, f - frag_now->fr_literal, 1, | |
1289 | oper, false, | |
1290 | ((opmode & M6811_OP_HIGH_ADDR) | |
1291 | ? BFD_RELOC_M68HC11_HI8 | |
1292 | : ((opmode & M6811_OP_LOW_ADDR) | |
1293 | ? BFD_RELOC_M68HC11_LO8 : BFD_RELOC_8))); | |
1294 | } | |
1295 | number_to_chars_bigendian (f, 0, 1); | |
1296 | } | |
1297 | else | |
1298 | { | |
1299 | as_fatal (_("Operand `%x' not recognized in fixup8."), oper->X_op); | |
1300 | } | |
1301 | } | |
1302 | ||
1303 | /* Put a 2 bytes expression described by 'oper'. If this expression contains | |
1304 | unresolved symbols, generate a 16-bit fixup. */ | |
1305 | static void | |
1306 | fixup16 (oper, mode, opmode) | |
1307 | expressionS *oper; | |
1308 | int mode; | |
1309 | int opmode ATTRIBUTE_UNUSED; | |
1310 | { | |
1311 | char *f; | |
1312 | ||
1313 | f = frag_more (2); | |
1314 | ||
1315 | if (oper->X_op == O_constant) | |
1316 | { | |
1317 | if (!check_range (oper->X_add_number, mode)) | |
1318 | { | |
1319 | as_bad (_("Operand out of 16-bit range: `%ld'."), | |
fafb6d17 | 1320 | oper->X_add_number); |
60bcf0fa NC |
1321 | } |
1322 | number_to_chars_bigendian (f, oper->X_add_number & 0x0FFFF, 2); | |
1323 | } | |
1324 | else if (oper->X_op != O_register) | |
1325 | { | |
1326 | fixS *fixp; | |
1327 | ||
1328 | /* Now create a 16-bit fixup. */ | |
1329 | fixp = fix_new_exp (frag_now, f - frag_now->fr_literal, 2, | |
1330 | oper, | |
1331 | (mode & M6812_OP_JUMP_REL16 ? true : false), | |
1332 | (mode & M6812_OP_JUMP_REL16 | |
1333 | ? BFD_RELOC_16_PCREL : BFD_RELOC_16)); | |
1334 | number_to_chars_bigendian (f, 0, 2); | |
1335 | if (mode & M6812_OP_JUMP_REL16) | |
1336 | fixp->fx_pcrel_adjust = 2; | |
1337 | } | |
1338 | else | |
1339 | { | |
1340 | as_fatal (_("Operand `%x' not recognized in fixup16."), oper->X_op); | |
1341 | } | |
1342 | } | |
60bcf0fa NC |
1343 | \f |
1344 | /* 68HC11 and 68HC12 code generation. */ | |
1345 | ||
1346 | /* Translate the short branch/bsr instruction into a long branch. */ | |
1347 | static unsigned char | |
1348 | convert_branch (code) | |
1349 | unsigned char code; | |
1350 | { | |
1351 | if (IS_OPCODE (code, M6812_BSR)) | |
1352 | return M6812_JSR; | |
1353 | else if (IS_OPCODE (code, M6811_BSR)) | |
1354 | return M6811_JSR; | |
1355 | else if (IS_OPCODE (code, M6811_BRA)) | |
1356 | return (current_architecture & cpu6812) ? M6812_JMP : M6811_JMP; | |
1357 | else | |
1358 | as_fatal (_("Unexpected branch conversion with `%x'"), code); | |
1359 | ||
1360 | /* Keep gcc happy. */ | |
1361 | return M6811_JSR; | |
1362 | } | |
1363 | ||
1364 | /* Start a new insn that contains at least 'size' bytes. Record the | |
1365 | line information of that insn in the dwarf2 debug sections. */ | |
fafb6d17 | 1366 | static char * |
60bcf0fa NC |
1367 | m68hc11_new_insn (size) |
1368 | int size; | |
1369 | { | |
fafb6d17 | 1370 | char *f; |
60bcf0fa NC |
1371 | |
1372 | f = frag_more (size); | |
1373 | ||
4dc7ead9 | 1374 | dwarf2_emit_insn (size); |
fafb6d17 | 1375 | |
60bcf0fa NC |
1376 | return f; |
1377 | } | |
1378 | ||
1379 | /* Builds a jump instruction (bra, bcc, bsr). */ | |
1380 | static void | |
1381 | build_jump_insn (opcode, operands, nb_operands, jmp_mode) | |
1382 | struct m68hc11_opcode *opcode; | |
1383 | operand operands[]; | |
1384 | int nb_operands; | |
1385 | int jmp_mode; | |
1386 | { | |
1387 | unsigned char code; | |
1388 | int insn_size; | |
1389 | char *f; | |
1390 | unsigned long n; | |
1391 | ||
1392 | /* The relative branch convertion is not supported for | |
1393 | brclr and brset. */ | |
1394 | assert ((opcode->format & M6811_OP_BITMASK) == 0); | |
1395 | assert (nb_operands == 1); | |
1396 | assert (operands[0].reg1 == REG_NONE && operands[0].reg2 == REG_NONE); | |
1397 | ||
1398 | code = opcode->opcode; | |
1399 | insn_size = 1; | |
1400 | ||
1401 | n = operands[0].exp.X_add_number; | |
1402 | ||
1403 | /* Turn into a long branch: | |
1404 | - when force long branch option (and not for jbcc pseudos), | |
1405 | - when jbcc and the constant is out of -128..127 range, | |
1406 | - when branch optimization is allowed and branch out of range. */ | |
1407 | if ((jmp_mode == 0 && flag_force_long_jumps) | |
1408 | || (operands[0].exp.X_op == O_constant | |
1409 | && (!check_range (n, opcode->format) && | |
1410 | (jmp_mode == 1 || flag_fixed_branchs == 0)))) | |
1411 | { | |
1412 | if (code == M6811_BSR || code == M6811_BRA || code == M6812_BSR) | |
1413 | { | |
1414 | code = convert_branch (code); | |
1415 | ||
1416 | f = m68hc11_new_insn (1); | |
1417 | number_to_chars_bigendian (f, code, 1); | |
1418 | } | |
1419 | else if (current_architecture & cpu6812) | |
1420 | { | |
1421 | /* 68HC12: translate the bcc into a lbcc. */ | |
1422 | f = m68hc11_new_insn (2); | |
1423 | number_to_chars_bigendian (f, M6811_OPCODE_PAGE2, 1); | |
1424 | number_to_chars_bigendian (f + 1, code, 1); | |
1425 | fixup16 (&operands[0].exp, M6812_OP_JUMP_REL16, | |
1426 | M6812_OP_JUMP_REL16); | |
1427 | return; | |
1428 | } | |
1429 | else | |
1430 | { | |
1431 | /* 68HC11: translate the bcc into b!cc +3; jmp <L>. */ | |
1432 | f = m68hc11_new_insn (3); | |
1433 | code ^= 1; | |
1434 | number_to_chars_bigendian (f, code, 1); | |
1435 | number_to_chars_bigendian (f + 1, 3, 1); | |
1436 | number_to_chars_bigendian (f + 2, M6811_JMP, 1); | |
1437 | } | |
1438 | fixup16 (&operands[0].exp, M6811_OP_IND16, M6811_OP_IND16); | |
1439 | return; | |
1440 | } | |
1441 | ||
1442 | /* Branch with a constant that must fit in 8-bits. */ | |
1443 | if (operands[0].exp.X_op == O_constant) | |
1444 | { | |
1445 | if (!check_range (n, opcode->format)) | |
1446 | { | |
1447 | as_bad (_("Operand out of range for a relative branch: `%ld'"), | |
1448 | n); | |
1449 | } | |
1450 | else if (opcode->format & M6812_OP_JUMP_REL16) | |
1451 | { | |
1452 | f = m68hc11_new_insn (4); | |
1453 | number_to_chars_bigendian (f, M6811_OPCODE_PAGE2, 1); | |
1454 | number_to_chars_bigendian (f + 1, code, 1); | |
1455 | number_to_chars_bigendian (f + 2, n & 0x0ffff, 2); | |
1456 | } | |
1457 | else | |
1458 | { | |
1459 | f = m68hc11_new_insn (2); | |
1460 | number_to_chars_bigendian (f, code, 1); | |
1461 | number_to_chars_bigendian (f + 1, n & 0x0FF, 1); | |
1462 | } | |
1463 | } | |
1464 | else if (opcode->format & M6812_OP_JUMP_REL16) | |
1465 | { | |
1466 | f = m68hc11_new_insn (2); | |
1467 | number_to_chars_bigendian (f, M6811_OPCODE_PAGE2, 1); | |
1468 | number_to_chars_bigendian (f + 1, code, 1); | |
1469 | fixup16 (&operands[0].exp, M6812_OP_JUMP_REL16, M6812_OP_JUMP_REL16); | |
1470 | } | |
1471 | else | |
1472 | { | |
1473 | char *opcode; | |
1474 | ||
1475 | /* Branch offset must fit in 8-bits, don't do some relax. */ | |
1476 | if (jmp_mode == 0 && flag_fixed_branchs) | |
1477 | { | |
1478 | opcode = m68hc11_new_insn (1); | |
1479 | number_to_chars_bigendian (opcode, code, 1); | |
1480 | fixup8 (&operands[0].exp, M6811_OP_JUMP_REL, M6811_OP_JUMP_REL); | |
1481 | } | |
1482 | ||
1483 | /* bra/bsr made be changed into jmp/jsr. */ | |
1484 | else if (code == M6811_BSR || code == M6811_BRA || code == M6812_BSR) | |
1485 | { | |
1486 | opcode = m68hc11_new_insn (2); | |
1487 | number_to_chars_bigendian (opcode, code, 1); | |
1488 | number_to_chars_bigendian (opcode + 1, 0, 1); | |
df86943d | 1489 | frag_var (rs_machine_dependent, 2, 1, |
60bcf0fa NC |
1490 | ENCODE_RELAX (STATE_PC_RELATIVE, STATE_UNDF), |
1491 | operands[0].exp.X_add_symbol, (offsetT) n, opcode); | |
1492 | } | |
1493 | else if (current_architecture & cpu6812) | |
1494 | { | |
1495 | opcode = m68hc11_new_insn (2); | |
1496 | number_to_chars_bigendian (opcode, code, 1); | |
1497 | number_to_chars_bigendian (opcode + 1, 0, 1); | |
1498 | frag_var (rs_machine_dependent, 2, 2, | |
1499 | ENCODE_RELAX (STATE_CONDITIONAL_BRANCH_6812, STATE_UNDF), | |
1500 | operands[0].exp.X_add_symbol, (offsetT) n, opcode); | |
1501 | } | |
1502 | else | |
1503 | { | |
1504 | opcode = m68hc11_new_insn (2); | |
1505 | number_to_chars_bigendian (opcode, code, 1); | |
1506 | number_to_chars_bigendian (opcode + 1, 0, 1); | |
1507 | frag_var (rs_machine_dependent, 3, 3, | |
1508 | ENCODE_RELAX (STATE_CONDITIONAL_BRANCH, STATE_UNDF), | |
1509 | operands[0].exp.X_add_symbol, (offsetT) n, opcode); | |
1510 | } | |
1511 | } | |
1512 | } | |
1513 | ||
1514 | /* Builds a dbne/dbeq/tbne/tbeq instruction. */ | |
1515 | static void | |
1516 | build_dbranch_insn (opcode, operands, nb_operands, jmp_mode) | |
1517 | struct m68hc11_opcode *opcode; | |
1518 | operand operands[]; | |
1519 | int nb_operands; | |
1520 | int jmp_mode; | |
1521 | { | |
1522 | unsigned char code; | |
1523 | int insn_size; | |
1524 | char *f; | |
1525 | unsigned long n; | |
1526 | ||
1527 | /* The relative branch convertion is not supported for | |
1528 | brclr and brset. */ | |
1529 | assert ((opcode->format & M6811_OP_BITMASK) == 0); | |
1530 | assert (nb_operands == 2); | |
1531 | assert (operands[0].reg1 != REG_NONE); | |
1532 | ||
1533 | code = opcode->opcode & 0x0FF; | |
1534 | insn_size = 1; | |
1535 | ||
1536 | f = m68hc11_new_insn (1); | |
1537 | number_to_chars_bigendian (f, code, 1); | |
1538 | ||
1539 | n = operands[1].exp.X_add_number; | |
1540 | code = operands[0].reg1; | |
1541 | ||
1542 | if (operands[0].reg1 == REG_NONE || operands[0].reg1 == REG_CCR | |
1543 | || operands[0].reg1 == REG_PC) | |
1544 | as_bad (_("Invalid register for dbcc/tbcc instruction.")); | |
1545 | ||
1546 | if (opcode->format & M6812_OP_IBCC_MARKER) | |
1547 | code |= 0x80; | |
1548 | else if (opcode->format & M6812_OP_TBCC_MARKER) | |
1549 | code |= 0x40; | |
1550 | ||
1551 | if (!(opcode->format & M6812_OP_EQ_MARKER)) | |
1552 | code |= 0x20; | |
1553 | ||
1554 | /* Turn into a long branch: | |
1555 | - when force long branch option (and not for jbcc pseudos), | |
1556 | - when jdbcc and the constant is out of -256..255 range, | |
1557 | - when branch optimization is allowed and branch out of range. */ | |
1558 | if ((jmp_mode == 0 && flag_force_long_jumps) | |
1559 | || (operands[1].exp.X_op == O_constant | |
1560 | && (!check_range (n, M6812_OP_IBCC_MARKER) && | |
1561 | (jmp_mode == 1 || flag_fixed_branchs == 0)))) | |
1562 | { | |
1563 | f = frag_more (2); | |
1564 | code ^= 0x20; | |
1565 | number_to_chars_bigendian (f, code, 1); | |
1566 | number_to_chars_bigendian (f + 1, M6812_JMP, 1); | |
1567 | fixup16 (&operands[0].exp, M6811_OP_IND16, M6811_OP_IND16); | |
1568 | return; | |
1569 | } | |
1570 | ||
1571 | /* Branch with a constant that must fit in 9-bits. */ | |
1572 | if (operands[1].exp.X_op == O_constant) | |
1573 | { | |
1574 | if (!check_range (n, M6812_OP_IBCC_MARKER)) | |
1575 | { | |
1576 | as_bad (_("Operand out of range for a relative branch: `%ld'"), | |
1577 | n); | |
1578 | } | |
1579 | else | |
1580 | { | |
1581 | if ((long) n < 0) | |
1582 | code |= 0x10; | |
1583 | ||
1584 | f = frag_more (2); | |
1585 | number_to_chars_bigendian (f, code, 1); | |
1586 | number_to_chars_bigendian (f + 1, n & 0x0FF, 1); | |
1587 | } | |
1588 | } | |
1589 | else | |
1590 | { | |
1591 | /* Branch offset must fit in 8-bits, don't do some relax. */ | |
1592 | if (jmp_mode == 0 && flag_fixed_branchs) | |
1593 | { | |
1594 | fixup8 (&operands[0].exp, M6811_OP_JUMP_REL, M6811_OP_JUMP_REL); | |
1595 | } | |
1596 | ||
1597 | else | |
1598 | { | |
1599 | f = frag_more (2); | |
1600 | number_to_chars_bigendian (f, code, 1); | |
1601 | number_to_chars_bigendian (f + 1, 0, 1); | |
1602 | frag_var (rs_machine_dependent, 3, 3, | |
1603 | ENCODE_RELAX (STATE_XBCC_BRANCH, STATE_UNDF), | |
1604 | operands[1].exp.X_add_symbol, (offsetT) n, f); | |
1605 | } | |
1606 | } | |
1607 | } | |
1608 | ||
1609 | #define OP_EXTENDED (M6811_OP_PAGE2 | M6811_OP_PAGE3 | M6811_OP_PAGE4) | |
1610 | ||
1611 | /* Assemble the post index byte for 68HC12 extended addressing modes. */ | |
1612 | static int | |
1613 | build_indexed_byte (op, format, move_insn) | |
1614 | operand *op; | |
1615 | int format ATTRIBUTE_UNUSED; | |
1616 | int move_insn; | |
1617 | { | |
1618 | unsigned char byte = 0; | |
1619 | char *f; | |
1620 | int mode; | |
1621 | long val; | |
1622 | ||
1623 | val = op->exp.X_add_number; | |
1624 | mode = op->mode; | |
1625 | if (mode & M6812_AUTO_INC_DEC) | |
1626 | { | |
1627 | byte = 0x20; | |
1628 | if (mode & (M6812_POST_INC | M6812_POST_DEC)) | |
1629 | byte |= 0x10; | |
1630 | ||
1631 | if (op->exp.X_op == O_constant) | |
1632 | { | |
1633 | if (!check_range (val, mode)) | |
1634 | { | |
1635 | as_bad (_("Increment/decrement value is out of range: `%ld'."), | |
fafb6d17 | 1636 | val); |
60bcf0fa NC |
1637 | } |
1638 | if (mode & (M6812_POST_INC | M6812_PRE_INC)) | |
1639 | byte |= (val - 1) & 0x07; | |
1640 | else | |
1641 | byte |= (8 - ((val) & 7)) | 0x8; | |
1642 | } | |
1643 | switch (op->reg1) | |
1644 | { | |
1645 | case REG_NONE: | |
1646 | as_fatal (_("Expecting a register.")); | |
1647 | ||
1648 | case REG_X: | |
1649 | byte |= 0; | |
1650 | break; | |
1651 | ||
1652 | case REG_Y: | |
1653 | byte |= 0x40; | |
1654 | break; | |
1655 | ||
1656 | case REG_SP: | |
1657 | byte |= 0x80; | |
1658 | break; | |
1659 | ||
1660 | default: | |
1661 | as_bad (_("Invalid register for post/pre increment.")); | |
1662 | break; | |
1663 | } | |
1664 | ||
1665 | f = frag_more (1); | |
1666 | number_to_chars_bigendian (f, byte, 1); | |
1667 | return 1; | |
1668 | } | |
1669 | ||
1670 | if (mode & M6812_OP_IDX) | |
1671 | { | |
1672 | switch (op->reg1) | |
1673 | { | |
1674 | case REG_X: | |
1675 | byte = 0; | |
1676 | break; | |
1677 | ||
1678 | case REG_Y: | |
1679 | byte = 1; | |
1680 | break; | |
1681 | ||
1682 | case REG_SP: | |
1683 | byte = 2; | |
1684 | break; | |
1685 | ||
1686 | case REG_PC: | |
1687 | byte = 3; | |
1688 | break; | |
1689 | ||
1690 | default: | |
1691 | as_bad (_("Invalid register.")); | |
1692 | break; | |
1693 | } | |
1694 | if (op->exp.X_op == O_constant) | |
1695 | { | |
1696 | if (!check_range (val, M6812_OP_IDX)) | |
1697 | { | |
1698 | as_bad (_("Offset out of 16-bit range: %ld."), val); | |
1699 | } | |
1700 | ||
1701 | if (move_insn && !(val >= -16 && val <= 15)) | |
1702 | { | |
1703 | as_bad (_("Offset out of 5-bit range for movw/movb insn.")); | |
1704 | return -1; | |
1705 | } | |
1706 | ||
1707 | if (val >= -16 && val <= 15 && !(mode & M6812_OP_IDX_2)) | |
1708 | { | |
1709 | byte = byte << 6; | |
1710 | byte |= val & 0x1f; | |
1711 | f = frag_more (1); | |
1712 | number_to_chars_bigendian (f, byte, 1); | |
1713 | return 1; | |
1714 | } | |
1715 | else if (val >= -256 && val <= 255 && !(mode & M6812_OP_IDX_2)) | |
1716 | { | |
1717 | byte = byte << 3; | |
1718 | byte |= 0xe0; | |
1719 | if (val < 0) | |
1720 | byte |= 0x1; | |
1721 | f = frag_more (2); | |
1722 | number_to_chars_bigendian (f, byte, 1); | |
1723 | number_to_chars_bigendian (f + 1, val & 0x0FF, 1); | |
1724 | return 2; | |
1725 | } | |
1726 | else | |
1727 | { | |
1728 | byte = byte << 3; | |
1729 | if (mode & M6812_OP_IDX_2) | |
1730 | byte |= 0xe3; | |
1731 | else | |
1732 | byte |= 0xe2; | |
1733 | ||
1734 | f = frag_more (3); | |
1735 | number_to_chars_bigendian (f, byte, 1); | |
1736 | number_to_chars_bigendian (f + 1, val & 0x0FFFF, 2); | |
1737 | return 3; | |
1738 | } | |
1739 | } | |
1740 | f = frag_more (1); | |
1741 | number_to_chars_bigendian (f, byte, 1); | |
fafb6d17 NC |
1742 | #if 0 |
1743 | fix_new_exp (frag_now, f - frag_now->fr_literal, 2, | |
1744 | &op->exp, false, BFD_RELOC_16); | |
1745 | #endif | |
60bcf0fa NC |
1746 | frag_var (rs_machine_dependent, 2, 2, |
1747 | ENCODE_RELAX (STATE_INDEXED_OFFSET, STATE_UNDF), | |
1748 | op->exp.X_add_symbol, val, f); | |
1749 | return 3; | |
1750 | } | |
1751 | ||
1752 | if (mode & M6812_OP_REG) | |
1753 | { | |
1754 | if (mode & M6812_OP_IDX_2) | |
1755 | { | |
1756 | if (op->reg1 != REG_D) | |
1757 | as_bad (_("Expecting register D for indexed indirect mode.")); | |
1758 | if (move_insn) | |
1759 | as_bad (_("Indexed indirect mode is not allowed for movb/movw.")); | |
1760 | ||
1761 | byte = 0xE7; | |
1762 | } | |
1763 | else | |
1764 | { | |
1765 | switch (op->reg1) | |
1766 | { | |
1767 | case REG_A: | |
1768 | byte = 0xE4; | |
1769 | break; | |
1770 | ||
1771 | case REG_B: | |
1772 | byte = 0xE5; | |
1773 | break; | |
1774 | ||
1775 | default: | |
1776 | as_bad (_("Invalid accumulator register.")); | |
1777 | ||
1778 | case REG_D: | |
1779 | byte = 0xE6; | |
1780 | break; | |
1781 | } | |
1782 | } | |
1783 | switch (op->reg2) | |
1784 | { | |
1785 | case REG_X: | |
1786 | break; | |
1787 | ||
1788 | case REG_Y: | |
1789 | byte |= (1 << 3); | |
1790 | break; | |
1791 | ||
1792 | case REG_SP: | |
1793 | byte |= (2 << 3); | |
1794 | break; | |
1795 | ||
1796 | case REG_PC: | |
1797 | byte |= (3 << 3); | |
1798 | break; | |
1799 | ||
1800 | default: | |
1801 | as_bad (_("Invalid indexed register.")); | |
1802 | break; | |
1803 | } | |
1804 | f = frag_more (1); | |
1805 | number_to_chars_bigendian (f, byte, 1); | |
1806 | return 1; | |
1807 | } | |
1808 | ||
1809 | as_fatal (_("Addressing mode not implemented yet.")); | |
1810 | return 0; | |
1811 | } | |
1812 | ||
1813 | /* Assemble the 68HC12 register mode byte. */ | |
1814 | static int | |
1815 | build_reg_mode (op, format) | |
1816 | operand *op; | |
1817 | int format; | |
1818 | { | |
1819 | unsigned char byte; | |
1820 | char *f; | |
1821 | ||
1822 | if (format & M6812_OP_SEX_MARKER | |
1823 | && op->reg1 != REG_A && op->reg1 != REG_B && op->reg1 != REG_CCR) | |
1824 | as_bad (_("Invalid source register for this instruction, use 'tfr'.")); | |
1825 | else if (op->reg1 == REG_NONE || op->reg1 == REG_PC) | |
1826 | as_bad (_("Invalid source register.")); | |
1827 | ||
1828 | if (format & M6812_OP_SEX_MARKER | |
1829 | && op->reg2 != REG_D | |
1830 | && op->reg2 != REG_X && op->reg2 != REG_Y && op->reg2 != REG_SP) | |
1831 | as_bad (_("Invalid destination register for this instruction, use 'tfr'.")); | |
1832 | else if (op->reg2 == REG_NONE || op->reg2 == REG_PC) | |
1833 | as_bad (_("Invalid destination register.")); | |
1834 | ||
1835 | byte = (op->reg1 << 4) | (op->reg2); | |
1836 | if (format & M6812_OP_EXG_MARKER) | |
1837 | byte |= 0x80; | |
1838 | ||
1839 | f = frag_more (1); | |
1840 | number_to_chars_bigendian (f, byte, 1); | |
1841 | return 1; | |
1842 | } | |
1843 | ||
1844 | /* build_insn takes a pointer to the opcode entry in the opcode table, | |
1845 | the array of operand expressions and builds the correspding instruction. | |
1846 | This operation only deals with non relative jumps insn (need special | |
1847 | handling). */ | |
1848 | static void | |
1849 | build_insn (opcode, operands, nb_operands) | |
1850 | struct m68hc11_opcode *opcode; | |
1851 | operand operands[]; | |
1852 | int nb_operands ATTRIBUTE_UNUSED; | |
1853 | { | |
1854 | int i; | |
1855 | char *f; | |
1856 | int insn_size = 1; | |
1857 | long format; | |
1858 | int move_insn = 0; | |
1859 | ||
1860 | /* Put the page code instruction if there is one. */ | |
1861 | format = opcode->format; | |
1862 | if (format & OP_EXTENDED) | |
1863 | { | |
1864 | int page_code; | |
1865 | ||
1866 | f = m68hc11_new_insn (2); | |
1867 | if (format & M6811_OP_PAGE2) | |
1868 | page_code = M6811_OPCODE_PAGE2; | |
1869 | else if (format & M6811_OP_PAGE3) | |
1870 | page_code = M6811_OPCODE_PAGE3; | |
1871 | else | |
1872 | page_code = M6811_OPCODE_PAGE4; | |
1873 | ||
1874 | number_to_chars_bigendian (f, page_code, 1); | |
1875 | f++; | |
1876 | insn_size = 2; | |
1877 | } | |
1878 | else | |
1879 | f = m68hc11_new_insn (1); | |
1880 | ||
1881 | number_to_chars_bigendian (f, opcode->opcode, 1); | |
1882 | ||
1883 | i = 0; | |
1884 | ||
1885 | /* The 68HC12 movb and movw instructions are special. We have to handle | |
1886 | them in a special way. */ | |
1887 | if (format & (M6812_OP_IND16_P2 | M6812_OP_IDX_P2)) | |
1888 | { | |
1889 | move_insn = 1; | |
1890 | if (format & M6812_OP_IDX) | |
1891 | { | |
1892 | insn_size += build_indexed_byte (&operands[0], format, 1); | |
1893 | i = 1; | |
1894 | format &= ~M6812_OP_IDX; | |
1895 | } | |
1896 | if (format & M6812_OP_IDX_P2) | |
1897 | { | |
1898 | insn_size += build_indexed_byte (&operands[1], format, 1); | |
1899 | i = 0; | |
1900 | format &= ~M6812_OP_IDX_P2; | |
1901 | } | |
1902 | } | |
1903 | ||
1904 | if (format & (M6811_OP_DIRECT | M6811_OP_IMM8)) | |
1905 | { | |
1906 | insn_size++; | |
1907 | fixup8 (&operands[i].exp, | |
1908 | format & (M6811_OP_DIRECT | M6811_OP_IMM8 | M6812_OP_TRAP_ID), | |
1909 | operands[i].mode); | |
1910 | i++; | |
1911 | } | |
1912 | else if (format & (M6811_OP_IMM16 | M6811_OP_IND16)) | |
1913 | { | |
1914 | insn_size += 2; | |
1915 | fixup16 (&operands[i].exp, format & (M6811_OP_IMM16 | M6811_OP_IND16), | |
1916 | operands[i].mode); | |
1917 | i++; | |
1918 | } | |
1919 | else if (format & (M6811_OP_IX | M6811_OP_IY)) | |
1920 | { | |
1921 | if ((format & M6811_OP_IX) && (operands[0].reg1 != REG_X)) | |
1922 | as_bad (_("Invalid indexed register, expecting register X.")); | |
1923 | if ((format & M6811_OP_IY) && (operands[0].reg1 != REG_Y)) | |
1924 | as_bad (_("Invalid indexed register, expecting register Y.")); | |
1925 | ||
1926 | insn_size++; | |
1927 | fixup8 (&operands[0].exp, M6811_OP_IX, operands[0].mode); | |
1928 | i = 1; | |
1929 | } | |
1930 | else if (format & | |
1931 | (M6812_OP_IDX | M6812_OP_IDX_2 | M6812_OP_IDX_1 | M6812_OP_D_IDX)) | |
1932 | { | |
1933 | insn_size += build_indexed_byte (&operands[i], format, move_insn); | |
1934 | i++; | |
1935 | } | |
1936 | else if (format & M6812_OP_REG && current_architecture & cpu6812) | |
1937 | { | |
1938 | insn_size += build_reg_mode (&operands[i], format); | |
1939 | i++; | |
1940 | } | |
1941 | if (format & M6811_OP_BITMASK) | |
1942 | { | |
1943 | insn_size++; | |
1944 | fixup8 (&operands[i].exp, M6811_OP_BITMASK, operands[i].mode); | |
1945 | i++; | |
1946 | } | |
1947 | if (format & M6811_OP_JUMP_REL) | |
1948 | { | |
1949 | insn_size++; | |
1950 | fixup8 (&operands[i].exp, M6811_OP_JUMP_REL, operands[i].mode); | |
1951 | i++; | |
1952 | } | |
1953 | else if (format & M6812_OP_IND16_P2) | |
1954 | { | |
1955 | insn_size += 2; | |
1956 | fixup16 (&operands[1].exp, M6811_OP_IND16, operands[1].mode); | |
1957 | } | |
1958 | } | |
60bcf0fa NC |
1959 | \f |
1960 | /* Opcode identification and operand analysis. */ | |
1961 | ||
1962 | /* find() gets a pointer to an entry in the opcode table. It must look at all | |
1963 | opcodes with the same name and use the operands to choose the correct | |
1964 | opcode. Returns the opcode pointer if there was a match and 0 if none. */ | |
1965 | static struct m68hc11_opcode * | |
1966 | find (opc, operands, nb_operands) | |
1967 | struct m68hc11_opcode_def *opc; | |
1968 | operand operands[]; | |
1969 | int nb_operands; | |
1970 | { | |
1971 | int i, match, pos; | |
1972 | struct m68hc11_opcode *opcode; | |
1973 | struct m68hc11_opcode *op_indirect; | |
1974 | ||
1975 | op_indirect = 0; | |
1976 | opcode = opc->opcode; | |
1977 | ||
1978 | /* Now search the opcode table table for one with operands | |
1979 | that matches what we've got. We're only done if the operands matched so | |
1980 | far AND there are no more to check. */ | |
1981 | for (pos = match = 0; match == 0 && pos < opc->nb_modes; pos++, opcode++) | |
1982 | { | |
1983 | int poss_indirect = 0; | |
1984 | long format = opcode->format; | |
1985 | int expect; | |
1986 | ||
1987 | expect = 0; | |
1988 | if (opcode->format & M6811_OP_MASK) | |
1989 | expect++; | |
1990 | if (opcode->format & M6811_OP_BITMASK) | |
1991 | expect++; | |
1992 | if (opcode->format & (M6811_OP_JUMP_REL | M6812_OP_JUMP_REL16)) | |
1993 | expect++; | |
1994 | if (opcode->format & (M6812_OP_IND16_P2 | M6812_OP_IDX_P2)) | |
1995 | expect++; | |
1996 | ||
1997 | for (i = 0; expect == nb_operands && i < nb_operands; i++) | |
1998 | { | |
1999 | int mode = operands[i].mode; | |
2000 | ||
2001 | if (mode & M6811_OP_IMM16) | |
2002 | { | |
2003 | if (format & | |
2004 | (M6811_OP_IMM8 | M6811_OP_IMM16 | M6811_OP_BITMASK)) | |
2005 | continue; | |
2006 | break; | |
2007 | } | |
2008 | if (mode == M6811_OP_DIRECT) | |
2009 | { | |
2010 | if (format & M6811_OP_DIRECT) | |
2011 | continue; | |
2012 | ||
2013 | /* If the operand is a page 0 operand, remember a | |
2014 | possible <abs-16> addressing mode. We mark | |
2015 | this and continue to check other operands. */ | |
2016 | if (format & M6811_OP_IND16 | |
2017 | && flag_strict_direct_addressing && op_indirect == 0) | |
2018 | { | |
2019 | poss_indirect = 1; | |
2020 | continue; | |
2021 | } | |
2022 | break; | |
2023 | } | |
2024 | if (mode & M6811_OP_IND16) | |
2025 | { | |
2026 | if (i == 0 && (format & M6811_OP_IND16) != 0) | |
2027 | continue; | |
2028 | if (i != 0 && (format & M6812_OP_IND16_P2) != 0) | |
2029 | continue; | |
2030 | if (i == 0 && (format & M6811_OP_BITMASK)) | |
2031 | break; | |
2032 | } | |
2033 | if (mode & (M6811_OP_JUMP_REL | M6812_OP_JUMP_REL16)) | |
2034 | { | |
2035 | if (format & (M6811_OP_JUMP_REL | M6812_OP_JUMP_REL16)) | |
2036 | continue; | |
2037 | } | |
2038 | if (mode & M6812_OP_REG) | |
2039 | { | |
df86943d NC |
2040 | if (i == 0 |
2041 | && (format & M6812_OP_REG) | |
2042 | && (operands[i].reg2 == REG_NONE)) | |
60bcf0fa | 2043 | continue; |
df86943d NC |
2044 | if (i == 0 |
2045 | && (format & M6812_OP_REG) | |
2046 | && (format & M6812_OP_REG_2) | |
2047 | && (operands[i].reg2 != REG_NONE)) | |
60bcf0fa | 2048 | continue; |
df86943d NC |
2049 | if (i == 0 |
2050 | && (format & M6812_OP_IDX) | |
2051 | && (operands[i].reg2 != REG_NONE)) | |
2052 | continue; | |
2053 | if (i == 0 | |
2054 | && (format & M6812_OP_D_IDX)) | |
2055 | continue; | |
2056 | if (i == 0 | |
2057 | && (format & M6812_OP_IDX) | |
60bcf0fa NC |
2058 | && (format & (M6812_OP_IND16_P2 | M6812_OP_IDX_P2))) |
2059 | continue; | |
df86943d NC |
2060 | if (i == 1 |
2061 | && (format & M6812_OP_IDX_P2)) | |
60bcf0fa NC |
2062 | continue; |
2063 | break; | |
2064 | } | |
2065 | if (mode & M6812_OP_IDX) | |
2066 | { | |
2067 | if (format & M6811_OP_IX && operands[i].reg1 == REG_X) | |
2068 | continue; | |
2069 | if (format & M6811_OP_IY && operands[i].reg1 == REG_Y) | |
2070 | continue; | |
2071 | if (i == 0 | |
2072 | && format & (M6812_OP_IDX | M6812_OP_IDX_1 | M6812_OP_IDX_2) | |
2073 | && (operands[i].reg1 == REG_X | |
2074 | || operands[i].reg1 == REG_Y | |
2075 | || operands[i].reg1 == REG_SP | |
2076 | || operands[i].reg1 == REG_PC)) | |
2077 | continue; | |
2078 | if (i == 1 && format & M6812_OP_IDX_P2) | |
2079 | continue; | |
2080 | } | |
2081 | if (mode & M6812_AUTO_INC_DEC) | |
2082 | { | |
2083 | if (i == 0 | |
2084 | && format & (M6812_OP_IDX | M6812_OP_IDX_1 | | |
2085 | M6812_OP_IDX_2)) | |
2086 | continue; | |
2087 | if (i == 1 && format & M6812_OP_IDX_P2) | |
2088 | continue; | |
2089 | } | |
2090 | break; | |
2091 | } | |
2092 | match = i == nb_operands; | |
2093 | ||
2094 | /* Operands are ok but an operand uses page 0 addressing mode | |
2095 | while the insn supports abs-16 mode. Keep a reference to this | |
2096 | insns in case there is no insn supporting page 0 addressing. */ | |
2097 | if (match && poss_indirect) | |
2098 | { | |
2099 | op_indirect = opcode; | |
2100 | match = 0; | |
2101 | } | |
2102 | if (match) | |
2103 | break; | |
2104 | } | |
2105 | ||
2106 | /* Page 0 addressing is used but not supported by any insn. | |
2107 | If absolute addresses are supported, we use that insn. */ | |
2108 | if (match == 0 && op_indirect) | |
2109 | { | |
2110 | opcode = op_indirect; | |
2111 | match = 1; | |
2112 | } | |
2113 | ||
2114 | if (!match) | |
2115 | { | |
2116 | return (0); | |
2117 | } | |
2118 | ||
2119 | return opcode; | |
2120 | } | |
2121 | ||
60bcf0fa NC |
2122 | /* Find the real opcode and its associated operands. We use a progressive |
2123 | approach here. On entry, 'opc' points to the first opcode in the | |
2124 | table that matches the opcode name in the source line. We try to | |
2125 | isolate an operand, find a possible match in the opcode table. | |
2126 | We isolate another operand if no match were found. The table 'operands' | |
2127 | is filled while operands are recognized. | |
2128 | ||
2129 | Returns the opcode pointer that matches the opcode name in the | |
2130 | source line and the associated operands. */ | |
2131 | static struct m68hc11_opcode * | |
2132 | find_opcode (opc, operands, nb_operands) | |
2133 | struct m68hc11_opcode_def *opc; | |
2134 | operand operands[]; | |
2135 | int *nb_operands; | |
2136 | { | |
2137 | struct m68hc11_opcode *opcode; | |
2138 | int i; | |
2139 | ||
2140 | if (opc->max_operands == 0) | |
2141 | { | |
2142 | *nb_operands = 0; | |
2143 | return opc->opcode; | |
2144 | } | |
2145 | ||
2146 | for (i = 0; i < opc->max_operands;) | |
2147 | { | |
2148 | int result; | |
2149 | ||
2150 | result = get_operand (&operands[i], i, opc->format); | |
2151 | if (result <= 0) | |
fafb6d17 | 2152 | return 0; |
60bcf0fa NC |
2153 | |
2154 | /* Special case where the bitmask of the bclr/brclr | |
2155 | instructions is not introduced by #. | |
2156 | Example: bclr 3,x $80. */ | |
2157 | if (i == 1 && (opc->format & M6811_OP_BITMASK) | |
2158 | && (operands[i].mode & M6811_OP_IND16)) | |
2159 | { | |
2160 | operands[i].mode = M6811_OP_IMM16; | |
2161 | } | |
2162 | ||
2163 | i += result; | |
2164 | *nb_operands = i; | |
2165 | if (i >= opc->min_operands) | |
2166 | { | |
2167 | opcode = find (opc, operands, i); | |
2168 | if (opcode) | |
fafb6d17 | 2169 | return opcode; |
60bcf0fa NC |
2170 | } |
2171 | ||
2172 | if (*input_line_pointer == ',') | |
2173 | input_line_pointer++; | |
2174 | } | |
82efde3a | 2175 | |
60bcf0fa NC |
2176 | return 0; |
2177 | } | |
2178 | ||
2179 | #define M6812_XBCC_MARKER (M6812_OP_TBCC_MARKER \ | |
2180 | | M6812_OP_DBCC_MARKER \ | |
2181 | | M6812_OP_IBCC_MARKER) | |
60bcf0fa NC |
2182 | \f |
2183 | /* Gas line assembler entry point. */ | |
2184 | ||
2185 | /* This is the main entry point for the machine-dependent assembler. str | |
2186 | points to a machine-dependent instruction. This function is supposed to | |
2187 | emit the frags/bytes it assembles to. */ | |
2188 | void | |
2189 | md_assemble (str) | |
2190 | char *str; | |
2191 | { | |
2192 | struct m68hc11_opcode_def *opc; | |
2193 | struct m68hc11_opcode *opcode; | |
2194 | ||
2195 | unsigned char *op_start, *save; | |
2196 | unsigned char *op_end; | |
2197 | char name[20]; | |
2198 | int nlen = 0; | |
2199 | operand operands[M6811_MAX_OPERANDS]; | |
2200 | int nb_operands; | |
2201 | int branch_optimize = 0; | |
2202 | int alias_id = -1; | |
2203 | ||
fafb6d17 | 2204 | /* Drop leading whitespace. */ |
60bcf0fa NC |
2205 | while (*str == ' ') |
2206 | str++; | |
2207 | ||
2208 | /* Find the opcode end and get the opcode in 'name'. The opcode is forced | |
2209 | lower case (the opcode table only has lower case op-codes). */ | |
2210 | for (op_start = op_end = (unsigned char *) (str); | |
2211 | *op_end && nlen < 20 && !is_end_of_line[*op_end] && *op_end != ' '; | |
2212 | op_end++) | |
2213 | { | |
2214 | name[nlen] = tolower (op_start[nlen]); | |
2215 | nlen++; | |
2216 | } | |
2217 | name[nlen] = 0; | |
2218 | ||
2219 | if (nlen == 0) | |
2220 | { | |
2221 | as_bad (_("No instruction or missing opcode.")); | |
2222 | return; | |
2223 | } | |
2224 | ||
2225 | /* Find the opcode definition given its name. */ | |
2226 | opc = (struct m68hc11_opcode_def *) hash_find (m68hc11_hash, name); | |
2227 | ||
2228 | /* If it's not recognized, look for 'jbsr' and 'jbxx'. These are | |
2229 | pseudo insns for relative branch. For these branchs, we always | |
2230 | optimize them (turned into absolute branchs) even if --short-branchs | |
2231 | is given. */ | |
2232 | if (opc == NULL && name[0] == 'j' && name[1] == 'b') | |
2233 | { | |
2234 | opc = (struct m68hc11_opcode_def *) hash_find (m68hc11_hash, &name[1]); | |
2235 | if (opc | |
2236 | && (!(opc->format & M6811_OP_JUMP_REL) | |
2237 | || (opc->format & M6811_OP_BITMASK))) | |
2238 | opc = 0; | |
2239 | if (opc) | |
2240 | branch_optimize = 1; | |
2241 | } | |
2242 | ||
2243 | /* The following test should probably be removed. This is not conform | |
2244 | to Motorola assembler specs. */ | |
2245 | if (opc == NULL && flag_mri) | |
2246 | { | |
2247 | if (*op_end == ' ' || *op_end == '\t') | |
2248 | { | |
2249 | while (*op_end == ' ' || *op_end == '\t') | |
2250 | op_end++; | |
2251 | ||
2252 | if (nlen < 19 | |
2253 | && (*op_end && | |
2254 | (is_end_of_line[op_end[1]] | |
2255 | || op_end[1] == ' ' || op_end[1] == '\t' | |
2256 | || !isalnum (op_end[1]))) | |
2257 | && (*op_end == 'a' || *op_end == 'b' | |
2258 | || *op_end == 'A' || *op_end == 'B' | |
2259 | || *op_end == 'd' || *op_end == 'D' | |
2260 | || *op_end == 'x' || *op_end == 'X' | |
2261 | || *op_end == 'y' || *op_end == 'Y')) | |
2262 | { | |
2263 | name[nlen++] = tolower (*op_end++); | |
2264 | name[nlen] = 0; | |
2265 | opc = (struct m68hc11_opcode_def *) hash_find (m68hc11_hash, | |
2266 | name); | |
2267 | } | |
2268 | } | |
2269 | } | |
2270 | ||
2271 | /* Identify a possible instruction alias. There are some on the | |
2272 | 68HC12 to emulate a fiew 68HC11 instructions. */ | |
2273 | if (opc == NULL && (current_architecture & cpu6812)) | |
2274 | { | |
2275 | int i; | |
2276 | ||
2277 | for (i = 0; i < m68hc12_num_alias; i++) | |
2278 | if (strcmp (m68hc12_alias[i].name, name) == 0) | |
2279 | { | |
2280 | alias_id = i; | |
2281 | break; | |
2282 | } | |
2283 | } | |
2284 | if (opc == NULL && alias_id < 0) | |
2285 | { | |
2286 | as_bad (_("Opcode `%s' is not recognized."), name); | |
2287 | return; | |
2288 | } | |
2289 | save = input_line_pointer; | |
2290 | input_line_pointer = op_end; | |
2291 | ||
2292 | if (opc) | |
2293 | { | |
2294 | opc->used++; | |
2295 | opcode = find_opcode (opc, operands, &nb_operands); | |
2296 | } | |
2297 | else | |
2298 | opcode = 0; | |
2299 | ||
2300 | if ((opcode || alias_id >= 0) && !flag_mri) | |
2301 | { | |
2302 | char *p = input_line_pointer; | |
2303 | ||
2304 | while (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r') | |
2305 | p++; | |
2306 | ||
2307 | if (*p != '\n' && *p) | |
2308 | as_bad (_("Garbage at end of instruction: `%s'."), p); | |
2309 | } | |
2310 | ||
2311 | input_line_pointer = save; | |
2312 | ||
2313 | if (alias_id >= 0) | |
2314 | { | |
2315 | char *f = m68hc11_new_insn (m68hc12_alias[alias_id].size); | |
fafb6d17 | 2316 | |
60bcf0fa NC |
2317 | number_to_chars_bigendian (f, m68hc12_alias[alias_id].code1, 1); |
2318 | if (m68hc12_alias[alias_id].size > 1) | |
2319 | number_to_chars_bigendian (f + 1, m68hc12_alias[alias_id].code2, 1); | |
2320 | ||
2321 | return; | |
2322 | } | |
2323 | ||
2324 | /* Opcode is known but does not have valid operands. Print out the | |
2325 | syntax for this opcode. */ | |
2326 | if (opcode == 0) | |
2327 | { | |
2328 | if (flag_print_insn_syntax) | |
2329 | print_insn_format (name); | |
2330 | ||
2331 | as_bad (_("Invalid operand for `%s'"), name); | |
2332 | return; | |
2333 | } | |
2334 | ||
2335 | /* Treat dbeq/ibeq/tbeq instructions in a special way. The branch is | |
2336 | relative and must be in the range -256..255 (9-bits). */ | |
2337 | if ((opcode->format & M6812_XBCC_MARKER) | |
2338 | && (opcode->format & M6811_OP_JUMP_REL)) | |
2339 | build_dbranch_insn (opcode, operands, nb_operands); | |
2340 | ||
2341 | /* Relative jumps instructions are taken care of separately. We have to make | |
2342 | sure that the relative branch is within the range -128..127. If it's out | |
2343 | of range, the instructions are changed into absolute instructions. | |
2344 | This is not supported for the brset and brclr instructions. */ | |
2345 | else if ((opcode->format & (M6811_OP_JUMP_REL | M6812_OP_JUMP_REL16)) | |
2346 | && !(opcode->format & M6811_OP_BITMASK)) | |
2347 | build_jump_insn (opcode, operands, nb_operands, branch_optimize); | |
2348 | else | |
2349 | build_insn (opcode, operands, nb_operands); | |
2350 | } | |
60bcf0fa NC |
2351 | \f |
2352 | /* Relocation, relaxation and frag conversions. */ | |
60bcf0fa NC |
2353 | long |
2354 | md_pcrel_from_section (fixp, sec) | |
2355 | fixS *fixp; | |
2356 | segT sec; | |
2357 | { | |
2358 | int adjust; | |
2359 | if (fixp->fx_addsy != (symbolS *) NULL | |
2360 | && (!S_IS_DEFINED (fixp->fx_addsy) | |
fafb6d17 | 2361 | || (S_GET_SEGMENT (fixp->fx_addsy) != sec))) |
60bcf0fa NC |
2362 | return 0; |
2363 | ||
2364 | adjust = fixp->fx_pcrel_adjust; | |
2365 | return fixp->fx_frag->fr_address + fixp->fx_where + adjust; | |
2366 | } | |
2367 | ||
2368 | /* If while processing a fixup, a reloc really needs to be created | |
2369 | then it is done here. */ | |
2370 | arelent * | |
2371 | tc_gen_reloc (section, fixp) | |
2372 | asection *section; | |
2373 | fixS *fixp; | |
2374 | { | |
2375 | arelent *reloc; | |
2376 | ||
2377 | reloc = (arelent *) xmalloc (sizeof (arelent)); | |
2378 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); | |
2379 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
2380 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
2381 | if (fixp->fx_r_type == 0) | |
2382 | reloc->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_16); | |
2383 | else | |
2384 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
2385 | if (reloc->howto == (reloc_howto_type *) NULL) | |
2386 | { | |
2387 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
2388 | _("Relocation %d is not supported by object file format."), | |
2389 | (int) fixp->fx_r_type); | |
2390 | return NULL; | |
2391 | } | |
2392 | ||
2393 | if (!fixp->fx_pcrel) | |
2394 | reloc->addend = fixp->fx_addnumber; | |
2395 | else | |
2396 | reloc->addend = (section->vma | |
2397 | + (fixp->fx_pcrel_adjust == 64 | |
2398 | ? -1 : fixp->fx_pcrel_adjust) | |
2399 | + fixp->fx_addnumber | |
2400 | + md_pcrel_from_section (fixp, section)); | |
2401 | return reloc; | |
2402 | } | |
2403 | ||
2404 | void | |
2405 | md_convert_frag (abfd, sec, fragP) | |
2406 | bfd *abfd ATTRIBUTE_UNUSED; | |
2407 | asection *sec ATTRIBUTE_UNUSED; | |
2408 | fragS *fragP; | |
2409 | { | |
2410 | fixS *fixp; | |
2411 | long disp; | |
2412 | char *buffer_address = fragP->fr_literal; | |
2413 | ||
2414 | /* Address in object code of the displacement. */ | |
2415 | register int object_address = fragP->fr_fix + fragP->fr_address; | |
2416 | ||
2417 | buffer_address += fragP->fr_fix; | |
2418 | ||
2419 | /* The displacement of the address, from current location. */ | |
2420 | disp = fragP->fr_symbol ? S_GET_VALUE (fragP->fr_symbol) : 0; | |
2421 | disp = (disp + fragP->fr_offset) - object_address; | |
2422 | disp += symbol_get_frag (fragP->fr_symbol)->fr_address; | |
2423 | ||
2424 | switch (fragP->fr_subtype) | |
2425 | { | |
2426 | case ENCODE_RELAX (STATE_PC_RELATIVE, STATE_BYTE): | |
2427 | fragP->fr_opcode[1] = disp; | |
2428 | break; | |
2429 | ||
2430 | case ENCODE_RELAX (STATE_PC_RELATIVE, STATE_WORD): | |
2431 | /* This relax is only for bsr and bra. */ | |
2432 | assert (IS_OPCODE (fragP->fr_opcode[0], M6811_BSR) | |
2433 | || IS_OPCODE (fragP->fr_opcode[0], M6811_BRA) | |
2434 | || IS_OPCODE (fragP->fr_opcode[0], M6812_BSR)); | |
2435 | ||
2436 | fragP->fr_opcode[0] = convert_branch (fragP->fr_opcode[0]); | |
2437 | ||
2438 | fix_new (fragP, fragP->fr_fix - 1, 2, | |
2439 | fragP->fr_symbol, fragP->fr_offset, 0, BFD_RELOC_16); | |
2440 | fragP->fr_fix += 1; | |
2441 | break; | |
2442 | ||
2443 | case ENCODE_RELAX (STATE_CONDITIONAL_BRANCH, STATE_BYTE): | |
2444 | case ENCODE_RELAX (STATE_CONDITIONAL_BRANCH_6812, STATE_BYTE): | |
2445 | fragP->fr_opcode[1] = disp; | |
2446 | break; | |
2447 | ||
2448 | case ENCODE_RELAX (STATE_CONDITIONAL_BRANCH, STATE_WORD): | |
2449 | /* Invert branch. */ | |
2450 | fragP->fr_opcode[0] ^= 1; | |
fafb6d17 | 2451 | fragP->fr_opcode[1] = 3; /* Branch offset. */ |
60bcf0fa NC |
2452 | buffer_address[0] = M6811_JMP; |
2453 | fix_new (fragP, fragP->fr_fix + 1, 2, | |
2454 | fragP->fr_symbol, fragP->fr_offset, 0, BFD_RELOC_16); | |
2455 | fragP->fr_fix += 3; | |
2456 | break; | |
2457 | ||
2458 | case ENCODE_RELAX (STATE_CONDITIONAL_BRANCH_6812, STATE_WORD): | |
2459 | /* Translate branch into a long branch. */ | |
2460 | fragP->fr_opcode[1] = fragP->fr_opcode[0]; | |
2461 | fragP->fr_opcode[0] = M6811_OPCODE_PAGE2; | |
2462 | ||
2463 | fixp = fix_new (fragP, fragP->fr_fix, 2, | |
2464 | fragP->fr_symbol, fragP->fr_offset, 1, | |
2465 | BFD_RELOC_16_PCREL); | |
2466 | fixp->fx_pcrel_adjust = 2; | |
2467 | fragP->fr_fix += 2; | |
2468 | break; | |
2469 | ||
2470 | case ENCODE_RELAX (STATE_INDEXED_OFFSET, STATE_BITS5): | |
2471 | fragP->fr_opcode[0] = fragP->fr_opcode[0] << 5; | |
2472 | fragP->fr_opcode[0] |= disp & 0x1f; | |
2473 | break; | |
2474 | ||
2475 | case ENCODE_RELAX (STATE_INDEXED_OFFSET, STATE_BITS9): | |
2476 | fragP->fr_opcode[0] = (fragP->fr_opcode[0] << 3); | |
2477 | fragP->fr_opcode[0] |= 0xE0; | |
2478 | fix_new (fragP, fragP->fr_fix + 1, 1, | |
2479 | fragP->fr_symbol, fragP->fr_offset, 0, BFD_RELOC_8); | |
2480 | fragP->fr_fix += 1; | |
2481 | break; | |
2482 | ||
2483 | case ENCODE_RELAX (STATE_INDEXED_OFFSET, STATE_BITS16): | |
2484 | fragP->fr_opcode[0] = (fragP->fr_opcode[0] << 3); | |
2485 | fragP->fr_opcode[0] |= 0xE2; | |
2486 | fix_new (fragP, fragP->fr_fix, 2, | |
2487 | fragP->fr_symbol, fragP->fr_offset, 0, BFD_RELOC_16); | |
2488 | fragP->fr_fix += 1; | |
2489 | break; | |
2490 | ||
2491 | case ENCODE_RELAX (STATE_XBCC_BRANCH, STATE_BYTE): | |
2492 | if (disp < 0) | |
2493 | fragP->fr_opcode[0] |= 0x10; | |
2494 | ||
2495 | fragP->fr_opcode[1] = disp & 0x0FF; | |
2496 | break; | |
2497 | ||
2498 | case ENCODE_RELAX (STATE_XBCC_BRANCH, STATE_WORD): | |
2499 | /* Invert branch. */ | |
2500 | fragP->fr_opcode[0] ^= 0x20; | |
2501 | fragP->fr_opcode[1] = 3; /* Branch offset. */ | |
2502 | buffer_address[0] = M6812_JMP; | |
2503 | fix_new (fragP, fragP->fr_fix + 1, 2, | |
2504 | fragP->fr_symbol, fragP->fr_offset, 0, BFD_RELOC_16); | |
2505 | fragP->fr_fix += 3; | |
2506 | break; | |
2507 | ||
2508 | default: | |
2509 | break; | |
2510 | } | |
2511 | } | |
2512 | ||
2513 | /* Force truly undefined symbols to their maximum size, and generally set up | |
2514 | the frag list to be relaxed. */ | |
2515 | int | |
2516 | md_estimate_size_before_relax (fragP, segment) | |
2517 | fragS *fragP; | |
2518 | asection *segment; | |
2519 | { | |
2520 | int old_fr_fix; | |
2521 | char *buffer_address = fragP->fr_fix + fragP->fr_literal; | |
2522 | ||
2523 | old_fr_fix = fragP->fr_fix; | |
2524 | ||
2525 | switch (fragP->fr_subtype) | |
2526 | { | |
2527 | case ENCODE_RELAX (STATE_PC_RELATIVE, STATE_UNDF): | |
2528 | ||
2529 | /* This relax is only for bsr and bra. */ | |
2530 | assert (IS_OPCODE (fragP->fr_opcode[0], M6811_BSR) | |
2531 | || IS_OPCODE (fragP->fr_opcode[0], M6811_BRA) | |
2532 | || IS_OPCODE (fragP->fr_opcode[0], M6812_BSR)); | |
2533 | ||
2534 | /* A relaxable case. */ | |
2535 | if (S_GET_SEGMENT (fragP->fr_symbol) == segment) | |
2536 | { | |
2537 | fragP->fr_subtype = ENCODE_RELAX (STATE_PC_RELATIVE, STATE_BYTE); | |
2538 | } | |
2539 | else | |
2540 | { | |
2541 | if (flag_fixed_branchs) | |
2542 | as_bad_where (fragP->fr_file, fragP->fr_line, | |
2543 | _("bra or bsr with undefined symbol.")); | |
2544 | ||
2545 | /* The symbol is undefined or in a separate section. Turn bra into a | |
2546 | jmp and bsr into a jsr. The insn becomes 3 bytes long (instead of | |
2547 | 2). A fixup is necessary for the unresolved symbol address. */ | |
2548 | ||
2549 | fragP->fr_opcode[0] = convert_branch (fragP->fr_opcode[0]); | |
2550 | ||
2551 | fragP->fr_fix++; | |
2552 | fix_new (fragP, old_fr_fix - 1, 2, fragP->fr_symbol, | |
2553 | fragP->fr_offset, 0, BFD_RELOC_16); | |
2554 | frag_wane (fragP); | |
2555 | } | |
2556 | break; | |
2557 | ||
2558 | case ENCODE_RELAX (STATE_CONDITIONAL_BRANCH, STATE_UNDF): | |
2559 | assert (current_architecture & cpu6811); | |
2560 | ||
2561 | if (S_GET_SEGMENT (fragP->fr_symbol) == segment) | |
2562 | { | |
2563 | fragP->fr_subtype = ENCODE_RELAX (STATE_CONDITIONAL_BRANCH, | |
2564 | STATE_BYTE); | |
2565 | } | |
2566 | else | |
2567 | { | |
fafb6d17 NC |
2568 | fragP->fr_opcode[0] ^= 1; /* Reverse sense of branch. */ |
2569 | fragP->fr_opcode[1] = 3; /* Skip next jmp insn (3 bytes). */ | |
60bcf0fa NC |
2570 | |
2571 | /* Don't use fr_opcode[2] because this may be | |
2572 | in a different frag. */ | |
2573 | buffer_address[0] = M6811_JMP; | |
2574 | ||
2575 | fragP->fr_fix++; | |
2576 | fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol, | |
2577 | fragP->fr_offset, 0, BFD_RELOC_16); | |
2578 | fragP->fr_fix += 2; | |
2579 | frag_wane (fragP); | |
2580 | } | |
2581 | break; | |
2582 | ||
2583 | case ENCODE_RELAX (STATE_INDEXED_OFFSET, STATE_UNDF): | |
2584 | assert (current_architecture & cpu6812); | |
2585 | ||
2586 | if (S_GET_SEGMENT (fragP->fr_symbol) == segment) | |
2587 | { | |
2588 | fragP->fr_subtype = ENCODE_RELAX (STATE_INDEXED_OFFSET, | |
2589 | STATE_BITS5); | |
2590 | } | |
2591 | else | |
2592 | { | |
2593 | /* Switch the indexed operation to 16-bit mode. */ | |
2594 | if ((fragP->fr_opcode[1] & 0x21) == 0x20) | |
2595 | fragP->fr_opcode[1] = (fragP->fr_opcode[1] >> 3) | 0xc0 | 0x02; | |
2596 | ||
2597 | fragP->fr_fix++; | |
2598 | fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol, | |
2599 | fragP->fr_offset, 0, BFD_RELOC_16); | |
2600 | fragP->fr_fix += 2; | |
2601 | frag_wane (fragP); | |
2602 | } | |
2603 | break; | |
2604 | ||
2605 | case ENCODE_RELAX (STATE_XBCC_BRANCH, STATE_UNDF): | |
2606 | assert (current_architecture & cpu6812); | |
2607 | ||
2608 | if (S_GET_SEGMENT (fragP->fr_symbol) == segment) | |
2609 | { | |
2610 | fragP->fr_subtype = ENCODE_RELAX (STATE_XBCC_BRANCH, STATE_BYTE); | |
2611 | } | |
2612 | else | |
2613 | { | |
fafb6d17 | 2614 | fragP->fr_opcode[0] ^= 0x20; /* Reverse sense of branch. */ |
60bcf0fa NC |
2615 | fragP->fr_opcode[1] = 3; /* Skip next jmp insn (3 bytes). */ |
2616 | ||
2617 | /* Don't use fr_opcode[2] because this may be | |
2618 | in a different frag. */ | |
2619 | buffer_address[0] = M6812_JMP; | |
2620 | ||
2621 | fragP->fr_fix++; | |
2622 | fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol, | |
2623 | fragP->fr_offset, 0, BFD_RELOC_16); | |
2624 | fragP->fr_fix += 2; | |
2625 | frag_wane (fragP); | |
2626 | } | |
2627 | break; | |
2628 | ||
2629 | case ENCODE_RELAX (STATE_CONDITIONAL_BRANCH_6812, STATE_UNDF): | |
2630 | assert (current_architecture & cpu6812); | |
2631 | ||
2632 | if (S_GET_SEGMENT (fragP->fr_symbol) == segment) | |
2633 | { | |
2634 | fragP->fr_subtype = ENCODE_RELAX (STATE_CONDITIONAL_BRANCH_6812, | |
2635 | STATE_BYTE); | |
2636 | } | |
2637 | else | |
2638 | { | |
2639 | /* Translate into a lbcc branch. */ | |
2640 | fragP->fr_opcode[1] = fragP->fr_opcode[0]; | |
2641 | fragP->fr_opcode[0] = M6811_OPCODE_PAGE2; | |
2642 | ||
2643 | fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol, | |
2644 | fragP->fr_offset, 0, BFD_RELOC_16_PCREL); | |
2645 | fragP->fr_fix += 2; | |
2646 | frag_wane (fragP); | |
2647 | } | |
2648 | break; | |
2649 | ||
2650 | default: | |
2651 | as_fatal (_("Subtype %d is not recognized."), fragP->fr_subtype); | |
2652 | } | |
2653 | ||
2654 | return (fragP->fr_fix - old_fr_fix); | |
2655 | } | |
2656 | ||
2657 | int | |
2658 | md_apply_fix (fixp, valuep) | |
2659 | fixS *fixp; | |
2660 | valueT *valuep; | |
2661 | { | |
2662 | char *where; | |
2663 | long value; | |
2664 | int op_type; | |
2665 | ||
2666 | if (fixp->fx_addsy == (symbolS *) NULL) | |
2667 | { | |
2668 | value = *valuep; | |
2669 | fixp->fx_done = 1; | |
2670 | } | |
2671 | else if (fixp->fx_pcrel) | |
2672 | { | |
2673 | value = *valuep; | |
2674 | } | |
2675 | else | |
2676 | { | |
2677 | value = fixp->fx_offset; | |
2678 | if (fixp->fx_subsy != (symbolS *) NULL) | |
2679 | { | |
2680 | if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) | |
2681 | { | |
2682 | value -= S_GET_VALUE (fixp->fx_subsy); | |
2683 | } | |
2684 | else | |
2685 | { | |
2686 | /* We don't actually support subtracting a symbol. */ | |
2687 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
2688 | _("Expression too complex.")); | |
2689 | } | |
2690 | } | |
2691 | } | |
2692 | ||
2693 | op_type = fixp->fx_r_type; | |
2694 | ||
2695 | /* Patch the instruction with the resolved operand. Elf relocation | |
2696 | info will also be generated to take care of linker/loader fixups. | |
2697 | The 68HC11 addresses only 64Kb, we are only concerned by 8 and 16-bit | |
2698 | relocs. BFD_RELOC_8 is basically used for .page0 access (the linker | |
2699 | will warn for overflows). BFD_RELOC_8_PCREL should not be generated | |
2700 | because it's either resolved or turned out into non-relative insns (see | |
2701 | relax table, bcc, bra, bsr transformations) | |
2702 | ||
2703 | The BFD_RELOC_32 is necessary for the support of --gstabs. */ | |
2704 | where = fixp->fx_frag->fr_literal + fixp->fx_where; | |
2705 | ||
2706 | switch (fixp->fx_r_type) | |
2707 | { | |
2708 | case BFD_RELOC_32: | |
2709 | bfd_putb32 ((bfd_vma) value, (unsigned char *) where); | |
2710 | break; | |
2711 | ||
2712 | case BFD_RELOC_16: | |
2713 | case BFD_RELOC_16_PCREL: | |
2714 | bfd_putb16 ((bfd_vma) value, (unsigned char *) where); | |
2715 | if (value < -65537 || value > 65535) | |
2716 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
2717 | _("Value out of 16-bit range.")); | |
2718 | break; | |
2719 | ||
2720 | case BFD_RELOC_M68HC11_HI8: | |
2721 | value = value >> 8; | |
fafb6d17 | 2722 | /* Fall through. */ |
60bcf0fa NC |
2723 | |
2724 | case BFD_RELOC_M68HC11_LO8: | |
2725 | case BFD_RELOC_8: | |
fafb6d17 NC |
2726 | #if 0 |
2727 | bfd_putb8 ((bfd_vma) value, (unsigned char *) where); | |
2728 | #endif | |
60bcf0fa NC |
2729 | ((bfd_byte *) where)[0] = (bfd_byte) value; |
2730 | break; | |
2731 | ||
2732 | case BFD_RELOC_8_PCREL: | |
fafb6d17 NC |
2733 | #if 0 |
2734 | bfd_putb8 ((bfd_vma) value, (unsigned char *) where); | |
2735 | #endif | |
60bcf0fa NC |
2736 | ((bfd_byte *) where)[0] = (bfd_byte) value; |
2737 | ||
2738 | if (value < -128 || value > 127) | |
2739 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
2740 | _("Value %ld too large for 8-bit PC-relative branch."), | |
2741 | value); | |
2742 | break; | |
2743 | ||
2744 | case BFD_RELOC_M68HC11_3B: | |
2745 | if (value <= 0 || value > 8) | |
2746 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
2747 | _("Auto increment/decrement offset '%ld' is out of range."), | |
2748 | value); | |
2749 | if (where[0] & 0x8) | |
2750 | value = 8 - value; | |
2751 | else | |
2752 | value--; | |
2753 | ||
2754 | where[0] = where[0] | (value & 0x07); | |
2755 | break; | |
2756 | ||
2757 | default: | |
2758 | as_fatal (_("Line %d: unknown relocation type: 0x%x."), | |
2759 | fixp->fx_line, fixp->fx_r_type); | |
2760 | } | |
82efde3a | 2761 | |
60bcf0fa NC |
2762 | return 0; |
2763 | } | |
2764 | ||
2765 | int | |
2766 | m68hc11_cleanup () | |
2767 | { | |
2768 | return 1; | |
2769 | } |