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f6c1a2d5 NC |
1 | /* tc-xgate.c -- Assembler code for Freescale XGATE |
2 | Copyright 2010, 2011, 2012 | |
3 | Free Software Foundation, Inc. | |
4 | Contributed by Sean Keys <skeys@ipdatasys.com> | |
5 | ||
6 | This file is part of GAS, the GNU Assembler. | |
7 | ||
8 | GAS is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3, or (at your option) | |
11 | any later version. | |
12 | ||
13 | GAS is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GAS; see the file COPYING. If not, write to | |
20 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, | |
21 | Boston, MA 02110-1301, USA. */ | |
22 | ||
23 | #include "as.h" | |
24 | #include "safe-ctype.h" | |
25 | #include "subsegs.h" | |
26 | #include "opcode/xgate.h" | |
27 | #include "dwarf2dbg.h" | |
28 | #include "elf/xgate.h" | |
29 | ||
30 | const char comment_chars[] = ";!"; | |
31 | const char line_comment_chars[] = "#*"; | |
32 | const char line_separator_chars[] = ""; | |
33 | const char EXP_CHARS[] = "eE"; | |
34 | const char FLT_CHARS[] = "dD"; | |
35 | ||
36 | #define SIXTEENTH_BIT 0x8000 | |
37 | #define N_BITS_IN_WORD 16 | |
38 | ||
39 | /* #define STATE_CONDITIONAL_BRANCH (1) */ | |
40 | #define STATE_PC_RELATIVE (2) | |
41 | #define REGISTER_P(ptr) (ptr == 'r') | |
42 | #define INCREMENT 01 | |
43 | #define DECREMENT 02 | |
44 | #define MAXREGISTER 07 | |
45 | #define MINREGISTER 00 | |
46 | ||
47 | #define OPTION_MMCU 'm' | |
48 | ||
49 | /* This macro has no side-effects. */ | |
50 | #define ENCODE_RELAX(what,length) (((what) << 2) + (length)) | |
51 | ||
19f55fe4 SK |
52 | /* Each unique opcode name has a handle. That handle may |
53 | contain pointers to opcodes with the same name but | |
54 | different address modes. */ | |
f6c1a2d5 NC |
55 | struct xgate_opcode_handle |
56 | { | |
57 | int number_of_modes; | |
58 | char *name; | |
59 | struct xgate_opcode *opc0[MAX_OPCODES]; | |
60 | }; | |
61 | ||
62 | /* LOCAL FUNCTIONS */ | |
63 | static char * | |
64 | xgate_parse_exp (char *, expressionS *); | |
65 | static inline char * | |
66 | skip_whitespace (char *); | |
67 | static void | |
68 | get_default_target (void); | |
69 | static char * | |
70 | extract_word (char *, char *, int); | |
71 | static char * | |
72 | xgate_new_instruction (int size); | |
73 | unsigned short | |
74 | xgate_apply_operand (unsigned short, unsigned short *, unsigned short, | |
75 | unsigned char); | |
76 | void | |
77 | xgate_operands (struct xgate_opcode *, char **); | |
78 | static unsigned int | |
79 | xgate_operand (struct xgate_opcode *, int *, int where, char **, char **); | |
80 | static struct xgate_opcode * | |
81 | xgate_find_match (struct xgate_opcode_handle *, int, unsigned int); | |
82 | static int | |
83 | cmp_opcode (struct xgate_opcode *, struct xgate_opcode *); | |
84 | unsigned int | |
85 | xgate_detect_format (char *); | |
86 | void | |
87 | xgate_print_syntax (char *); | |
88 | void | |
89 | xgate_print_table (void); | |
90 | ||
91 | /* LOCAL DATA */ | |
92 | static struct hash_control *xgate_hash; | |
93 | ||
94 | /* Previous opcode. */ | |
95 | static unsigned int prev = 0; | |
96 | ||
97 | static unsigned char fixup_required = 0; | |
98 | ||
99 | /* Used to enable clipping of 16 bit operands into 8 bit constraints. */ | |
100 | static unsigned char macroClipping = 0; | |
101 | ||
102 | static char oper_check; | |
103 | static char flag_print_insn_syntax = 0; | |
104 | static char flag_print_opcodes = 0; | |
105 | ||
106 | static int current_architecture; | |
107 | static const char *default_cpu; | |
108 | ||
109 | /* ELF flags to set in the output file header. */ | |
110 | static int elf_flags = E_XGATE_F64; | |
111 | ||
112 | /* This table describes how you change sizes for the various types of variable | |
113 | size expressions. This version only supports two kinds. */ | |
114 | ||
115 | /* The fields are: | |
116 | How far Forward this mode will reach. | |
117 | How far Backward this mode will reach. | |
118 | How many bytes this mode will add to the size of the frag. | |
119 | Which mode to go to if the offset won't fit in this one. */ | |
120 | ||
121 | relax_typeS md_relax_table[] = | |
122 | { | |
123 | {1, 1, 0, 0}, /* First entries aren't used. */ | |
124 | {1, 1, 0, 0}, /* For no good reason except. */ | |
125 | {1, 1, 0, 0}, /* that the VAX doesn't either. */ | |
126 | {1, 1, 0, 0}, | |
127 | /* XGATE 9 and 10 bit pc rel todo complete and test */ | |
128 | /*{(511), (-512), 0, ENCODE_RELAX (STATE_PC_RELATIVE, STATE_WORD)}, | |
129 | {(1023), (-1024), 0, ENCODE_RELAX (STATE_PC_RELATIVE, STATE_WORD)}, */ | |
130 | {0, 0, 0, 0} | |
131 | }; | |
132 | ||
133 | /* XGATE's registers all are 16-bit general purpose. They are numbered according to the specifications. */ | |
134 | typedef enum register_id | |
135 | { | |
136 | REG_NONE = -1, | |
137 | REG_R0 = 0, | |
138 | REG_R1 = 1, | |
139 | REG_R2 = 2, | |
140 | REG_R3 = 3, | |
141 | REG_R4 = 4, | |
142 | REG_R5 = 5, | |
143 | REG_R6 = 6, | |
144 | REG_R7 = 7, | |
145 | REG_PC = 8, | |
146 | REG_CCR = 9 | |
147 | } register_id; | |
148 | ||
149 | /* This table describes all the machine specific pseudo-ops the assembler | |
150 | has to support. The fields are: pseudo-op name without dot function to | |
151 | call to execute this pseudo-op Integer arg to pass to the function. */ | |
152 | const pseudo_typeS md_pseudo_table[] = | |
153 | { | |
154 | /* The following pseudo-ops are supported for MRI compatibility. */ | |
155 | {0, 0, 0} | |
156 | }; | |
157 | ||
158 | const char *md_shortopts = "m:"; | |
159 | ||
160 | struct option md_longopts[] = | |
161 | { | |
162 | #define OPTION_PRINT_INSN_SYNTAX (OPTION_MD_BASE + 0) | |
163 | { "print-insn-syntax", no_argument, NULL, OPTION_PRINT_INSN_SYNTAX }, | |
164 | ||
165 | #define OPTION_PRINT_OPCODES (OPTION_MD_BASE + 1) | |
166 | { "print-opcodes", no_argument, NULL, OPTION_PRINT_OPCODES }, | |
167 | ||
168 | #define OPTION_GENERATE_EXAMPLE (OPTION_MD_BASE + 2) | |
169 | { "generate-example", no_argument, NULL, OPTION_GENERATE_EXAMPLE }, | |
170 | ||
171 | #define OPTION_MSHORT (OPTION_MD_BASE + 3) | |
172 | { "mshort", no_argument, NULL, OPTION_MSHORT }, | |
173 | ||
174 | #define OPTION_MLONG (OPTION_MD_BASE + 4) | |
175 | { "mlong", no_argument, NULL, OPTION_MLONG }, | |
176 | ||
177 | #define OPTION_MSHORT_DOUBLE (OPTION_MD_BASE + 5) | |
178 | { "mshort-double", no_argument, NULL, OPTION_MSHORT_DOUBLE }, | |
179 | ||
180 | #define OPTION_MLONG_DOUBLE (OPTION_MD_BASE + 6) | |
181 | { "mlong-double", no_argument, NULL, OPTION_MLONG_DOUBLE }, | |
182 | ||
183 | { NULL, no_argument, NULL, 0 } | |
184 | }; | |
185 | ||
186 | size_t md_longopts_size = sizeof(md_longopts); | |
187 | ||
188 | char * | |
189 | md_atof (int type, char *litP, int *sizeP) | |
190 | { | |
191 | return ieee_md_atof (type, litP, sizeP, TRUE); | |
192 | } | |
193 | ||
194 | int | |
195 | md_parse_option (int c, char *arg) | |
196 | { | |
197 | switch (c) | |
198 | { | |
199 | case OPTION_MMCU: | |
200 | if (strcasecmp (arg, "v1") == 0) | |
201 | current_architecture = XGATE_V1; | |
202 | else if (strcasecmp (arg, "v2") == 0) | |
203 | current_architecture = XGATE_V2; | |
204 | else if (strcasecmp (arg, "v3") == 0) | |
205 | current_architecture = XGATE_V3; | |
206 | else | |
207 | as_bad (_(" architecture variant invalid")); | |
208 | break; | |
209 | ||
210 | case OPTION_PRINT_INSN_SYNTAX: | |
211 | flag_print_insn_syntax = 1; | |
212 | break; | |
213 | ||
214 | case OPTION_PRINT_OPCODES: | |
215 | flag_print_opcodes = 1; | |
216 | break; | |
217 | ||
218 | case OPTION_GENERATE_EXAMPLE: | |
219 | flag_print_opcodes = 2; | |
220 | break; | |
221 | ||
222 | case OPTION_MSHORT: | |
223 | elf_flags &= ~E_XGATE_I32; | |
224 | break; | |
225 | ||
226 | case OPTION_MLONG: | |
227 | elf_flags |= E_XGATE_I32; | |
228 | break; | |
229 | ||
230 | case OPTION_MSHORT_DOUBLE: | |
231 | elf_flags &= ~E_XGATE_F64; | |
232 | break; | |
233 | ||
234 | case OPTION_MLONG_DOUBLE: | |
235 | elf_flags |= E_XGATE_F64; | |
236 | break; | |
237 | ||
238 | default: | |
239 | return 0; | |
240 | } | |
241 | return 1; | |
242 | } | |
243 | ||
244 | const char * | |
245 | xgate_arch_format (void) | |
246 | { | |
247 | get_default_target (); | |
248 | ||
249 | if (current_architecture & cpuxgate) | |
250 | return "elf32-xgate"; | |
251 | ||
252 | return "error"; | |
253 | } | |
254 | ||
255 | static void | |
256 | get_default_target (void) | |
257 | { | |
258 | const bfd_target *target; | |
259 | bfd abfd; | |
260 | ||
261 | if (current_architecture != 0) | |
262 | return; | |
263 | ||
264 | default_cpu = "unknown"; | |
265 | target = bfd_find_target (0, &abfd); | |
266 | ||
267 | if (target && target->name) | |
268 | { | |
269 | if (strcmp (target->name, "elf32-xgate") == 0) | |
270 | { | |
271 | current_architecture = cpuxgate; | |
272 | default_cpu = "XGATE V1"; | |
273 | return; | |
274 | } | |
275 | ||
276 | as_bad (_("Default target `%s' is not supported."), target->name); | |
277 | } | |
278 | } | |
279 | ||
280 | void | |
281 | md_begin (void) | |
282 | { | |
283 | struct xgate_opcode *xgate_opcode_ptr = NULL; | |
284 | struct xgate_opcode *xgate_op_table = NULL; | |
285 | struct xgate_opcode_handle *op_handles = 0; | |
286 | char *prev_op_name = 0; | |
287 | int handle_enum = 0; | |
19f55fe4 | 288 | int number_of_op_handles = 0; |
f6c1a2d5 NC |
289 | int i, j = 0; |
290 | ||
291 | /* Create a local copy of our opcode table | |
292 | including an extra line for NULL termination. */ | |
293 | xgate_op_table = (struct xgate_opcode *) | |
19f55fe4 | 294 | xmalloc ((xgate_num_opcodes) * sizeof (struct xgate_opcode)); |
f6c1a2d5 NC |
295 | |
296 | memset (xgate_op_table, 0, | |
19f55fe4 | 297 | sizeof(struct xgate_opcode) * (xgate_num_opcodes)); |
f6c1a2d5 NC |
298 | |
299 | for (xgate_opcode_ptr = (struct xgate_opcode*) xgate_opcodes, i = 0; | |
300 | i < xgate_num_opcodes; i++) | |
301 | xgate_op_table[i] = xgate_opcode_ptr[i]; | |
302 | ||
303 | qsort (xgate_op_table, xgate_num_opcodes, sizeof(struct xgate_opcode), | |
304 | (int (*)(const void *, const void *)) cmp_opcode); | |
305 | ||
306 | /* Calculate number of handles since this will be | |
307 | smaller than the raw number of opcodes in the table. */ | |
19f55fe4 SK |
308 | prev_op_name = ""; |
309 | for (xgate_opcode_ptr = xgate_op_table, i = 0; i < xgate_num_opcodes; | |
310 | xgate_opcode_ptr++, i++) | |
f6c1a2d5 | 311 | { |
19f55fe4 SK |
312 | if (strcmp (prev_op_name, xgate_opcode_ptr->name)) |
313 | number_of_op_handles++; | |
f6c1a2d5 NC |
314 | prev_op_name = xgate_opcode_ptr->name; |
315 | } | |
316 | ||
317 | op_handles = (struct xgate_opcode_handle *) | |
19f55fe4 | 318 | xmalloc (sizeof(struct xgate_opcode_handle) * (number_of_op_handles)); |
f6c1a2d5 | 319 | |
19f55fe4 | 320 | /* Insert unique opcode names into hash table, aliasing duplicates. */ |
f6c1a2d5 NC |
321 | xgate_hash = hash_new (); |
322 | ||
19f55fe4 | 323 | prev_op_name = ""; |
f6c1a2d5 | 324 | for (xgate_opcode_ptr = xgate_op_table, i = 0, j = 0; i < xgate_num_opcodes; |
19f55fe4 | 325 | i++, xgate_opcode_ptr++) |
f6c1a2d5 | 326 | { |
19f55fe4 SK |
327 | if (!strcmp (prev_op_name, xgate_opcode_ptr->name)) |
328 | { | |
329 | handle_enum++; | |
330 | op_handles[j].opc0[handle_enum] = xgate_opcode_ptr; | |
331 | } | |
332 | else | |
f6c1a2d5 NC |
333 | { |
334 | handle_enum = 0; | |
335 | if (i) | |
19f55fe4 | 336 | j++; |
f6c1a2d5 NC |
337 | op_handles[j].name = xgate_opcode_ptr->name; |
338 | op_handles[j].opc0[0] = xgate_opcode_ptr; | |
19f55fe4 SK |
339 | hash_insert (xgate_hash, (char *) op_handles[j].name, |
340 | (char *) &(op_handles[j])); | |
f6c1a2d5 NC |
341 | } |
342 | op_handles[j].number_of_modes = handle_enum; | |
343 | prev_op_name = op_handles[j].name; | |
344 | } | |
345 | ||
f6c1a2d5 NC |
346 | if (flag_print_opcodes == 1) |
347 | xgate_print_table (); | |
348 | } | |
349 | ||
350 | void | |
351 | xgate_init_after_args (void) | |
352 | { | |
353 | } | |
354 | ||
355 | void | |
356 | md_show_usage (FILE * stream) | |
357 | { | |
358 | get_default_target (); | |
359 | ||
360 | fprintf ( | |
361 | stream, | |
362 | _("\ | |
363 | Freescale XGATE co-processor options:\n \ | |
364 | -mshort use 16-bit int ABI (default)\n \ | |
365 | -mlong use 32-bit int ABI\n \ | |
366 | -mshort-double use 32-bit double ABI\n \ | |
367 | -mlong-double use 64-bit double ABI (default)\n\ | |
368 | --mxgate specify the processor variant[default %s]\n\ | |
369 | --print-insn-syntax print the syntax of instruction in case of error\n\ | |
370 | --print-opcodes print the list of instructions with syntax\n\ | |
371 | --generate-example generate an example of each instruction"), | |
372 | default_cpu); | |
373 | } | |
374 | ||
375 | enum bfd_architecture | |
376 | xgate_arch (void) | |
377 | { | |
378 | get_default_target (); | |
379 | return bfd_arch_xgate; | |
380 | } | |
381 | ||
382 | int | |
383 | xgate_mach (void) | |
384 | { | |
385 | return 0; | |
386 | } | |
387 | ||
388 | void | |
389 | xgate_print_syntax (char *name) | |
390 | { | |
391 | int i; | |
392 | ||
393 | for (i = 0; i < xgate_num_opcodes; i++) | |
394 | { | |
395 | if (!strcmp (xgate_opcodes[i].name, name)) | |
396 | { | |
397 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_IDR)) | |
398 | printf ("\tFormat is %s\tRx, Rx, Rx+|-Rx|Rx\n", | |
399 | xgate_opcodes[i].name); | |
400 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_INH)) | |
401 | printf ("\tFormat is %s\n", xgate_opcodes[i].name); | |
402 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_TRI)) | |
403 | printf ("\tFormat is %s\tRx, Rx, Rx\n", xgate_opcodes[i].name); | |
404 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_DYA)) | |
405 | printf ("\tFormat is %s\tRx, Rx\n", xgate_opcodes[i].name); | |
406 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_DYA_MON) | |
407 | || !strcmp (xgate_opcodes[i].constraints, XGATE_OP_MON)) | |
408 | printf ("\tFormat is %s\tRx\n", xgate_opcodes[i].name); | |
409 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_IMM3)) | |
410 | printf ("\tFormat is %s\t<3-bit value>\n", xgate_opcodes[i].name); | |
411 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_IMM4)) | |
412 | printf ("\tFormat is %s\t<4 -bit value>\n", xgate_opcodes[i].name); | |
413 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_IMM8)) | |
414 | printf ("\tFormat is %s\tRx, <8-bit value>\n", | |
415 | xgate_opcodes[i].name); | |
416 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_IMM16)) | |
417 | printf ("\tFormat is %s\tRx, <16-bit value>\n", | |
418 | xgate_opcodes[i].name); | |
419 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_MON_R_C)) | |
420 | printf ("\tFormat is %s\tRx, CCR\n", xgate_opcodes[i].name); | |
421 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_MON_C_R)) | |
422 | printf ("\tFormat is %s\tCCR, Rx\n", xgate_opcodes[i].name); | |
423 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_MON_R_P)) | |
424 | printf ("\tFormat is %s\tRx, PC\n", xgate_opcodes[i].name); | |
425 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_IMM16mLDW)) | |
426 | printf ("\tFormat is %s\tRx, <16-bit value>\n", | |
427 | xgate_opcodes[i].name); | |
428 | } | |
429 | } | |
430 | } | |
431 | ||
432 | void | |
433 | xgate_print_table (void) | |
434 | { | |
435 | int i; | |
436 | ||
437 | for (i = 0; i < xgate_num_opcodes; i++) | |
438 | xgate_print_syntax (xgate_opcodes[i].name); | |
439 | ||
440 | return; | |
441 | } | |
442 | ||
443 | const char * | |
444 | xgate_listing_header (void) | |
445 | { | |
446 | if (current_architecture & cpuxgate) | |
447 | return "XGATE GAS "; | |
448 | ||
449 | return "ERROR MC9S12X GAS "; | |
450 | } | |
451 | ||
452 | symbolS * | |
453 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) | |
454 | { | |
455 | return 0; | |
456 | } | |
457 | ||
458 | /* GAS will call this function for each section at the end of the assembly, | |
459 | to permit the CPU backend to adjust the alignment of a section. */ | |
460 | ||
461 | valueT | |
462 | md_section_align (asection * seg, valueT addr) | |
463 | { | |
464 | int align = bfd_get_section_alignment (stdoutput, seg); | |
465 | return ((addr + (1 << align) - 1) & (-1 << align)); | |
466 | } | |
467 | ||
468 | void | |
469 | md_assemble (char *input_line) | |
470 | { | |
471 | struct xgate_opcode *opcode = 0; | |
472 | struct xgate_opcode *macro_opcode = 0; | |
473 | struct xgate_opcode_handle *opcode_handle = 0; | |
474 | /* Caller expects it to be returned as it was passed. */ | |
475 | char *saved_input_line = input_line; | |
476 | char op_name[9] = { 0 }; | |
477 | unsigned int sh_format = 0; | |
478 | char *p = 0; | |
479 | ||
480 | fixup_required = 0; | |
481 | oper_check = 0; /* set error flags */ | |
482 | input_line = extract_word (input_line, op_name, sizeof(op_name)); | |
483 | ||
484 | /* Check to make sure we are not reading a bogus line. */ | |
485 | if (!op_name[0]) | |
486 | as_bad (_("opcode missing or not found on input line")); | |
487 | ||
488 | if (!(opcode_handle = (struct xgate_opcode_handle *) hash_find (xgate_hash, | |
489 | op_name))) | |
490 | { | |
491 | as_bad (_("opcode %s not found in opcode hash table"), op_name); | |
492 | } | |
493 | else | |
494 | { | |
495 | /* Detect operand format so we can pull the proper opcode bin. */ | |
496 | sh_format = xgate_detect_format (input_line); | |
497 | ||
498 | opcode = xgate_find_match (opcode_handle, opcode_handle->number_of_modes, | |
499 | sh_format); | |
500 | ||
501 | if (!opcode) | |
502 | { | |
503 | as_bad (_("matching operands to opcode ")); | |
504 | xgate_print_syntax (opcode_handle->opc0[0]->name); | |
505 | } | |
506 | else if (opcode->size == 2) | |
507 | { | |
508 | /* Size is one word - assemble that native insn. */ | |
509 | xgate_operands (opcode, &input_line); | |
510 | } | |
511 | else | |
512 | { | |
513 | /* Insn is a simplified instruction - expand it out. */ | |
514 | macroClipping = 1; | |
515 | unsigned int i; | |
516 | ||
517 | /* skip past our ';' separator. */ | |
518 | for (i = strlen (opcode->constraints), p = opcode->constraints; i > 0; | |
519 | i--, p++) | |
520 | { | |
521 | if (*p == ';') | |
522 | { | |
523 | p++; | |
524 | break; | |
525 | } | |
526 | } | |
527 | input_line = skip_whitespace (input_line); | |
528 | char *macro_inline = input_line; | |
529 | ||
530 | /* Loop though the macro's opcode list and apply operands to each real opcode. */ | |
531 | for (i = 0; *p && i < (opcode->size / 2); i++) | |
532 | { | |
533 | /* Loop though macro operand list. */ | |
534 | input_line = macro_inline; /* Rewind. */ | |
535 | p = extract_word (p, op_name, 10); | |
536 | ||
537 | if (!(opcode_handle = (struct xgate_opcode_handle *) | |
538 | hash_find (xgate_hash, op_name))) | |
539 | { | |
540 | as_bad ( | |
541 | _(": processing macro, real opcode handle not found in hash")); | |
542 | break; | |
543 | } | |
544 | else | |
545 | { | |
546 | sh_format = xgate_detect_format (input_line); | |
547 | macro_opcode = xgate_find_match (opcode_handle, | |
548 | opcode_handle->number_of_modes, sh_format); | |
549 | xgate_operands (macro_opcode, &input_line); | |
550 | } | |
551 | } | |
552 | } | |
553 | } | |
554 | macroClipping = 0; | |
555 | input_line = saved_input_line; | |
556 | } | |
557 | ||
558 | /* Force truly undefined symbols to their maximum size, and generally set up | |
559 | the frag list to be relaxed. */ | |
560 | ||
561 | int | |
562 | md_estimate_size_before_relax (fragS *fragp, asection *seg) | |
563 | { | |
564 | /* If symbol is undefined or located in a different section, | |
565 | select the largest supported relocation. */ | |
566 | relax_substateT subtype; | |
567 | relax_substateT rlx_state[] = | |
568 | { 0, 2 }; | |
569 | ||
570 | for (subtype = 0; subtype < ARRAY_SIZE (rlx_state); subtype += 2) | |
571 | { | |
572 | if (fragp->fr_subtype == rlx_state[subtype] | |
573 | && (!S_IS_DEFINED (fragp->fr_symbol) | |
574 | || seg != S_GET_SEGMENT (fragp->fr_symbol))) | |
575 | { | |
576 | fragp->fr_subtype = rlx_state[subtype + 1]; | |
577 | break; | |
578 | } | |
579 | } | |
580 | ||
581 | if (fragp->fr_subtype >= ARRAY_SIZE (md_relax_table)) | |
582 | abort (); | |
583 | ||
584 | return md_relax_table[fragp->fr_subtype].rlx_length; | |
585 | } | |
586 | ||
587 | ||
588 | /* Relocation, relaxation and frag conversions. */ | |
589 | ||
590 | /* PC-relative offsets are relative to the start of the | |
591 | next instruction. That is, the address of the offset, plus its | |
592 | size, since the offset is always the last part of the insn. */ | |
593 | ||
594 | long | |
595 | md_pcrel_from (fixS * fixP) | |
596 | { | |
597 | return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address; | |
598 | } | |
599 | ||
600 | /* If while processing a fixup, a reloc really needs to be created | |
601 | then it is done here. */ | |
602 | ||
603 | arelent * | |
604 | tc_gen_reloc (asection * section ATTRIBUTE_UNUSED, fixS * fixp) | |
605 | { | |
606 | arelent * reloc; | |
607 | ||
608 | reloc = (arelent *) xmalloc (sizeof(arelent)); | |
609 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof(asymbol *)); | |
610 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
611 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
612 | ||
613 | if (fixp->fx_r_type == 0) | |
614 | { | |
615 | reloc->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_16); | |
616 | } | |
617 | else | |
618 | { | |
619 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
620 | } | |
621 | ||
622 | if (reloc->howto == (reloc_howto_type *) NULL) | |
623 | { | |
624 | as_bad_where (fixp->fx_file, fixp->fx_line, _ | |
625 | ("Relocation %d is not supported by object file format."), | |
626 | (int) fixp->fx_r_type); | |
627 | return NULL; | |
628 | } | |
629 | ||
630 | /* Since we use Rel instead of Rela, encode the vtable entry to be | |
631 | used in the relocation's section offset. */ | |
632 | if (fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
633 | reloc->address = fixp->fx_offset; | |
634 | reloc->addend = 0; | |
635 | return reloc; | |
636 | } | |
637 | ||
638 | /* Patch the instruction with the resolved operand. Elf relocation | |
639 | info will also be generated to take care of linker/loader fixups. | |
640 | The XGATE addresses only 16-bit addresses.The BFD_RELOC_32 is necessary | |
641 | for the support of --gstabs. */ | |
642 | ||
643 | void | |
644 | md_apply_fix (fixS * fixP, valueT * valP, segT seg ATTRIBUTE_UNUSED) | |
645 | { | |
646 | char *where; | |
647 | long value = *valP; | |
648 | int opcode = 0; | |
649 | ldiv_t result; | |
650 | ||
651 | /* If the fixup is done mark it done so no further symbol resolution will take place. */ | |
652 | if (fixP->fx_addsy == (symbolS *) NULL) | |
653 | { | |
654 | fixP->fx_done = 1; | |
655 | } | |
656 | ||
657 | /* We don't actually support subtracting a symbol. */ | |
658 | if (fixP->fx_subsy != (symbolS *) NULL) | |
659 | as_bad_where (fixP->fx_file, fixP->fx_line, _("Expression too complex.")); | |
660 | ||
661 | where = fixP->fx_frag->fr_literal + fixP->fx_where; | |
662 | opcode = bfd_getl16 (where); | |
663 | int mask = 0; | |
664 | ||
665 | switch (fixP->fx_r_type) | |
666 | { | |
667 | case R_XGATE_PCREL_9: | |
668 | if (value < -512 || value > 511) | |
669 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
670 | _("Value %ld too large for 9-bit PC-relative branch."), value); | |
671 | result = ldiv (value, 2); /* from bytes to words */ | |
672 | value = result.quot; | |
673 | if (result.rem) | |
674 | as_bad_where (fixP->fx_file, fixP->fx_line, _ | |
675 | ("Value %ld not aligned by 2 for 9-bit PC-relative branch."), value); | |
676 | mask = 0x1FF; /* Clip into 8-bit field FIXME I'm sure there is a more proper place for this */ | |
677 | value &= mask; | |
678 | number_to_chars_bigendian (where, (opcode | value), 2); | |
679 | break; | |
680 | case R_XGATE_PCREL_10: | |
681 | if (value < -1024 || value > 1023) | |
682 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
683 | _("Value %ld too large for 10-bit PC-relative branch."), value); | |
684 | result = ldiv (value, 2); /* from bytes to words */ | |
685 | value = result.quot; | |
686 | if (result.rem) | |
687 | as_bad_where (fixP->fx_file, fixP->fx_line, _ | |
688 | ("Value %ld not aligned by 2 for 10-bit PC-relative branch."), value); | |
689 | mask = 0x3FF; /* Clip into 9-bit field FIXME I'm sure there is a more proper place for this */ | |
690 | value &= mask; | |
691 | number_to_chars_bigendian (where, (opcode | value), 2); | |
692 | break; | |
693 | case BFD_RELOC_XGATE_IMM8_HI: | |
694 | if (value < -65537 || value > 65535) | |
695 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
696 | _("Value out of 16-bit range.")); | |
697 | value >>= 8; | |
698 | value &= 0x00ff; | |
699 | bfd_putb16 ((bfd_vma) value | opcode, (void *) where); | |
700 | break; | |
701 | case BFD_RELOC_XGATE_24: | |
702 | case BFD_RELOC_XGATE_IMM8_LO: | |
703 | if (value < -65537 || value > 65535) | |
704 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
705 | _("Value out of 16-bit range.")); | |
706 | value &= 0x00ff; | |
707 | bfd_putb16 ((bfd_vma) value | opcode, (void *) where); | |
708 | break; | |
709 | case BFD_RELOC_XGATE_IMM3: | |
710 | if (value < 0 || value > 7) | |
711 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
712 | _("Value out of 3-bit range.")); | |
713 | value <<= 8; /* make big endian */ | |
714 | number_to_chars_bigendian (where, (opcode | value), 2); | |
715 | break; | |
716 | case BFD_RELOC_XGATE_IMM4: | |
717 | if (value < 0 || value > 15) | |
718 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
719 | _("Value out of 4-bit range.")); | |
720 | value <<= 4; /* align the operand bits */ | |
721 | number_to_chars_bigendian (where, (opcode | value), 2); | |
722 | break; | |
723 | case BFD_RELOC_XGATE_IMM5: | |
724 | if (value < 0 || value > 31) | |
725 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
726 | _("Value out of 5-bit range.")); | |
727 | value <<= 5; /* align the operand bits */ | |
728 | number_to_chars_bigendian (where, (opcode | value), 2); | |
729 | break; | |
730 | case BFD_RELOC_8: | |
731 | ((bfd_byte *) where)[0] = (bfd_byte) value; | |
732 | break; | |
733 | case BFD_RELOC_32: | |
734 | bfd_putb32 ((bfd_vma) value, (unsigned char *) where); | |
735 | /* todo figure out how to make BFD_RELOC_16 the default */ | |
736 | break; | |
737 | case BFD_RELOC_16: | |
738 | bfd_putb16 ((bfd_vma) value, (unsigned char *) where); | |
739 | break; | |
740 | default: | |
741 | as_fatal (_("Line %d: unknown relocation type: 0x%x."), fixP->fx_line, | |
742 | fixP->fx_r_type); | |
743 | break; | |
744 | } | |
745 | } | |
746 | ||
747 | /* See whether we need to force a relocation into the output file. */ | |
748 | ||
749 | int | |
750 | tc_xgate_force_relocation (fixS * fixP) | |
751 | { | |
752 | if (fixP->fx_r_type == BFD_RELOC_XGATE_RL_GROUP) | |
753 | return 1; | |
754 | return generic_force_reloc (fixP); | |
755 | } | |
756 | ||
757 | /* Here we decide which fixups can be adjusted to make them relative | |
758 | to the beginning of the section instead of the symbol. Basically | |
759 | we need to make sure that the linker relaxation is done | |
760 | correctly, so in some cases we force the original symbol to be | |
761 | used. */ | |
762 | ||
763 | int | |
764 | tc_xgate_fix_adjustable (fixS * fixP) | |
765 | { | |
766 | switch (fixP->fx_r_type) | |
767 | { | |
768 | /* For the linker relaxation to work correctly, these relocs | |
769 | need to be on the symbol itself. */ | |
770 | case BFD_RELOC_16: | |
771 | case BFD_RELOC_XGATE_RL_JUMP: | |
772 | case BFD_RELOC_XGATE_RL_GROUP: | |
773 | case BFD_RELOC_VTABLE_INHERIT: | |
774 | case BFD_RELOC_VTABLE_ENTRY: | |
775 | case BFD_RELOC_32: | |
776 | return 0; | |
777 | default: | |
778 | return 1; | |
779 | } | |
780 | } | |
781 | ||
782 | void | |
783 | md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, | |
784 | asection * sec ATTRIBUTE_UNUSED, | |
785 | fragS * fragP ATTRIBUTE_UNUSED) | |
786 | { | |
787 | as_bad (("md_convert_frag not implemented yet")); | |
788 | abort (); | |
789 | } | |
790 | ||
791 | /* Set the ELF specific flags. */ | |
792 | ||
793 | void | |
794 | xgate_elf_final_processing (void) | |
795 | { | |
796 | elf_flags |= EF_XGATE_MACH; | |
797 | elf_elfheader (stdoutput)->e_flags &= ~EF_XGATE_ABI; | |
798 | elf_elfheader (stdoutput)->e_flags |= elf_flags; | |
799 | } | |
800 | ||
801 | static inline char * | |
802 | skip_whitespace (char *s) | |
803 | { | |
804 | while (*s == ' ' || *s == '\t' || *s == '(' || *s == ')') | |
805 | s++; | |
806 | ||
807 | return s; | |
808 | } | |
809 | ||
810 | /* Extract a word (continuous alpha-numeric chars) from the input line. */ | |
811 | ||
812 | static char * | |
813 | extract_word (char *from, char *to, int limit) | |
814 | { | |
815 | char *op_end; | |
816 | int size = 0; | |
817 | ||
818 | /* Drop leading whitespace. */ | |
819 | from = skip_whitespace (from); | |
820 | *to = 0; | |
821 | /* Find the op code end. */ | |
822 | for (op_end = from; *op_end != 0 && is_part_of_name (*op_end);) | |
823 | { | |
824 | to[size++] = *op_end++; | |
825 | if (size + 1 >= limit) | |
826 | break; | |
827 | } | |
828 | to[size] = 0; | |
829 | return op_end; | |
830 | } | |
831 | ||
832 | static char * | |
833 | xgate_new_instruction (int size) | |
834 | { | |
835 | char *f = frag_more (size); | |
836 | dwarf2_emit_insn (size); | |
837 | return f; | |
838 | } | |
839 | ||
840 | unsigned short | |
841 | xgate_apply_operand (unsigned short new_mask, | |
842 | unsigned short *availiable_mask_bits, | |
843 | unsigned short mask, | |
844 | unsigned char n_bits) | |
845 | { | |
846 | unsigned short n_shifts; | |
847 | unsigned int n_drop_bits; | |
848 | ||
849 | /* Shift until you find an available operand bit "1" and record the number of shifts. */ | |
850 | for (n_shifts = 0; | |
851 | !(*availiable_mask_bits & SIXTEENTH_BIT) && n_shifts < 16; | |
852 | n_shifts++) | |
853 | *availiable_mask_bits <<= 1; | |
854 | ||
855 | /* Shift for the number of bits your operand requires while bits are available. */ | |
856 | for (n_drop_bits = n_bits; | |
857 | n_drop_bits && (*availiable_mask_bits & SIXTEENTH_BIT); | |
858 | --n_drop_bits) | |
859 | *availiable_mask_bits <<= 1; | |
860 | ||
861 | if (n_drop_bits) | |
862 | as_bad (_(":operand has too many bits")); | |
863 | *availiable_mask_bits >>= n_shifts + n_bits; | |
864 | if ((n_drop_bits == 0) && (*availiable_mask_bits == 0)) | |
865 | { | |
866 | oper_check = 1; /* flag operand check as good */ | |
867 | } | |
868 | new_mask <<= N_BITS_IN_WORD - (n_shifts + n_bits); | |
869 | mask |= new_mask; | |
870 | return mask; | |
871 | } | |
872 | ||
873 | /* Parse ordinary expression. */ | |
874 | ||
875 | static char * | |
876 | xgate_parse_exp (char *s, expressionS * op) | |
877 | { | |
878 | input_line_pointer = s; | |
879 | expression(op); | |
880 | if (op->X_op == O_absent) | |
881 | as_bad (_("missing operand")); | |
882 | return input_line_pointer; | |
883 | } | |
884 | ||
885 | /* For testing. Comment out to prevent defined but not used warning | |
886 | ||
887 | static unsigned int | |
888 | xgate_get_constant(char *str, int max) | |
889 | { | |
890 | expressionS ex; | |
891 | ||
892 | str = skip_whitespace(str); | |
893 | input_line_pointer = str; | |
894 | expression (& ex); | |
895 | ||
896 | if (ex.X_op != O_constant) | |
897 | as_bad(_("constant value required")); | |
898 | ||
899 | if (ex.X_add_number > max || ex.X_add_number < 0) | |
900 | as_bad(_("number must be positive and less than %d"), max + 1); | |
901 | ||
902 | return ex.X_add_number; | |
903 | } | |
904 | */ | |
905 | ||
906 | static int | |
907 | cmp_opcode (struct xgate_opcode *op1, struct xgate_opcode *op2) | |
908 | { | |
909 | return strcmp (op1->name, op2->name); | |
910 | } | |
911 | ||
912 | /* Parse instruction operands. */ | |
913 | ||
914 | void | |
915 | xgate_operands (struct xgate_opcode *opcode, char **line) | |
916 | { | |
917 | char *frag = xgate_new_instruction (opcode->size); | |
918 | int where = frag - frag_now->fr_literal; | |
919 | char *op = opcode->constraints; | |
920 | unsigned int bin = (int) opcode->bin_opcode; | |
921 | char *str = *line; | |
922 | unsigned short oper_mask = 0; | |
923 | int operand_bit_length = 0; | |
924 | unsigned int operand = 0; | |
925 | char n_operand_bits = 0; | |
926 | char first_operand_equals_second = 0; | |
927 | int i = 0; | |
928 | char c = 0; | |
929 | ||
930 | /* Generate available operand bits mask. */ | |
931 | for (i = 0; (c = opcode->format[i]); i++) | |
932 | { | |
933 | if (ISDIGIT (c) || (c == 's')) | |
934 | { | |
935 | oper_mask <<= 1; | |
936 | } | |
937 | else | |
938 | { | |
939 | oper_mask <<= 1; | |
940 | oper_mask += 1; | |
941 | n_operand_bits++; | |
942 | } | |
943 | } | |
944 | ||
945 | /* Opcode has operands. */ | |
946 | /* Parse first operand. */ | |
947 | if (*op) | |
948 | { | |
949 | if (*op == '=') | |
950 | { | |
951 | first_operand_equals_second = 1; | |
952 | ++op; | |
953 | } | |
954 | operand = xgate_operand (opcode, &operand_bit_length, where, &op, &str); | |
955 | ++op; | |
956 | bin = xgate_apply_operand (operand, &oper_mask, bin, operand_bit_length); | |
957 | /* Parse second operand. */ | |
958 | if (*op) | |
959 | { | |
960 | if (*op == ',') | |
961 | ++op; | |
962 | str = skip_whitespace (str); | |
963 | if (*str++ != ',') | |
964 | { | |
965 | if (first_operand_equals_second) | |
966 | { | |
967 | bin = xgate_apply_operand (operand, &oper_mask, bin, | |
968 | operand_bit_length); | |
969 | ++op; | |
970 | } | |
971 | else | |
972 | { | |
973 | as_bad (_("`,' required before second operand")); | |
974 | } | |
975 | } | |
976 | else | |
977 | { | |
978 | str = skip_whitespace (str); | |
979 | operand = xgate_operand (opcode, &operand_bit_length, where, &op, | |
980 | &str); | |
981 | bin = xgate_apply_operand (operand, &oper_mask, bin, | |
982 | operand_bit_length); | |
983 | ++op; | |
984 | } | |
985 | } | |
986 | ||
987 | /* Parse the third register. */ | |
988 | if (*op) | |
989 | { | |
990 | if (*op == ',') | |
991 | ++op; | |
992 | str = skip_whitespace (str); | |
993 | if (*str++ != ',') | |
994 | as_bad (_("`,' required before third operand")); | |
995 | str = skip_whitespace (str); | |
996 | operand = xgate_operand (opcode, &operand_bit_length, where, &op, | |
997 | &str); | |
998 | bin = xgate_apply_operand (operand, &oper_mask, bin, | |
999 | operand_bit_length); | |
1000 | } | |
1001 | } | |
1002 | if (opcode->size == 2 && fixup_required) | |
1003 | { | |
1004 | bfd_putl16 (bin, frag); | |
1005 | } | |
1006 | else if ((opcode->sh_format & XG_PCREL)) | |
1007 | { | |
1008 | /* Write our data to a frag for further processing. */ | |
1009 | bfd_putl16 (opcode->bin_opcode, frag); | |
1010 | } | |
1011 | else | |
1012 | { | |
1013 | /* Apply operand mask(s)to bin opcode and write the output. */ | |
1014 | /* Since we are done write this frag in xgate BE format. */ | |
1015 | number_to_chars_bigendian (frag, bin, opcode->size); | |
1016 | } | |
1017 | prev = bin; | |
1018 | *line = str; | |
1019 | return; | |
1020 | } | |
1021 | ||
1022 | static unsigned int | |
1023 | xgate_operand (struct xgate_opcode *opcode, | |
1024 | int *bit_width, | |
1025 | int where, | |
1026 | char **op_con, | |
1027 | char **line) | |
1028 | { | |
1029 | expressionS op_expr; | |
1030 | fixS *fixp = 0; | |
1031 | char *op_constraint = *op_con; | |
1032 | unsigned int op_mask = 0; | |
1033 | char *str = skip_whitespace (*line); | |
1034 | char r_name[20] = | |
1035 | { 0 }; | |
1036 | unsigned int pp_fix = 0; | |
1037 | unsigned short max_size = 0; | |
1038 | int i; | |
1039 | ||
1040 | *bit_width = 0; | |
1041 | /* Reset. */ | |
1042 | ||
1043 | switch (*op_constraint) | |
1044 | { | |
1045 | case '+': /* Indexed register operand +/- or plain r. */ | |
1046 | /* TODO should be able to combine with with case R. */ | |
1047 | ||
1048 | /* Default to neither inc or dec. */ | |
1049 | pp_fix = 0; | |
1050 | *bit_width = 5; | |
1051 | str = skip_whitespace (str); | |
1052 | while (*str != ' ' && *str != '\t') | |
1053 | { | |
1054 | if (*str == '-') | |
1055 | pp_fix = DECREMENT; | |
1056 | else if (*str == '+') | |
1057 | pp_fix = INCREMENT; | |
1058 | else if (*str == 'r' || *str == 'R') | |
1059 | { | |
1060 | str = extract_word (str, r_name, sizeof(r_name)); | |
1061 | if (ISDIGIT (r_name[1])) | |
1062 | { | |
1063 | if (r_name[2] == '\0' && (r_name[1] - '0' < 8)) | |
1064 | op_mask = r_name[1] - '0'; | |
1065 | if (r_name[2] != '\0' && (r_name[1] - '0' > 7)) | |
1066 | as_bad (_(": expected register name r0-r7 read %s"), r_name); | |
1067 | continue; | |
1068 | } | |
1069 | } | |
1070 | str++; | |
1071 | } | |
1072 | op_mask <<= 2; | |
1073 | op_mask |= pp_fix; | |
1074 | break; | |
1075 | ||
1076 | case 'r': /* Register operand. */ | |
1077 | if (*str == 'r' || *str == 'R') | |
1078 | { | |
1079 | *bit_width = 3; | |
1080 | str = extract_word (str, r_name, sizeof(r_name)); | |
1081 | op_mask = 0xff; | |
1082 | if (ISDIGIT (r_name[1])) | |
1083 | { | |
1084 | if (r_name[2] == '\0') | |
1085 | op_mask = r_name[1] - '0'; | |
1086 | else if (r_name[1] != '0' && ISDIGIT (r_name[2]) | |
1087 | && r_name[3] == '\0') | |
1088 | op_mask = (r_name[1] - '0') * 10 + r_name[2] - '0'; | |
1089 | if (op_mask > MAXREGISTER) | |
1090 | as_bad (_(": expected register name r0-r7 read %s "), r_name); | |
1091 | } | |
1092 | } | |
1093 | else | |
1094 | { | |
1095 | as_bad (_(": expected register name r0-r7 read %s "), r_name); | |
1096 | } | |
1097 | break; | |
1098 | ||
1099 | case 'i': /* Immediate value or expression expected. */ | |
1100 | /* Advance the original format pointer. */ | |
1101 | (*op_con)++; | |
1102 | op_constraint++; | |
1103 | if (ISDIGIT (*op_constraint)) | |
1104 | { | |
1105 | *bit_width = (int) *op_constraint - '0'; | |
1106 | } | |
1107 | else if (*op_constraint == 'a') | |
1108 | { | |
1109 | *bit_width = 0x0A; | |
1110 | } | |
1111 | else if (*op_constraint == 'f') | |
1112 | { | |
1113 | *bit_width = 0x0F; | |
1114 | } | |
1115 | /* http://tigcc.ticalc.org/doc/gnuasm.html#SEC31 */ | |
1116 | if (*str == '#') | |
1117 | str++; | |
1118 | str = xgate_parse_exp (str, &op_expr); | |
1119 | if (op_expr.X_op == O_constant) | |
1120 | { | |
1121 | if (!ISDIGIT (*op_constraint)) | |
1122 | as_bad ( | |
1123 | _(":expected bit length with constraint type i(# immediate) read %c"), | |
1124 | *op_constraint); | |
1125 | op_mask = op_expr.X_add_number; | |
1126 | if ((opcode->name[strlen (opcode->name) - 1] == 'l') && macroClipping) | |
1127 | { | |
1128 | op_mask &= 0x00FF; | |
1129 | } | |
1130 | else if ((opcode->name[strlen (opcode->name) - 1]) == 'h' | |
1131 | && macroClipping) | |
1132 | { | |
1133 | op_mask >>= 8; | |
1134 | } | |
1135 | ||
1136 | /* Make sure it fits. */ | |
1137 | for (i = *bit_width; i; i--) | |
1138 | { | |
1139 | max_size <<= 1; | |
1140 | max_size += 1; | |
1141 | } | |
1142 | if (op_mask > max_size) | |
1143 | as_bad (_(":operand value(%d) too big for constraint"), op_mask); | |
1144 | } | |
1145 | else | |
1146 | { | |
1147 | fixup_required = 1; | |
1148 | if (*op_constraint == '8') | |
1149 | { | |
1150 | if ((opcode->name[strlen (opcode->name) - 1] == 'l') | |
1151 | && macroClipping) | |
1152 | { | |
1153 | fixp = fix_new_exp (frag_now, where, 2, &op_expr, FALSE, | |
1154 | BFD_RELOC_XGATE_24); | |
1155 | /* Should be BFD_RELOC_XGATE_IMM8_LO TODO fix. */ | |
1156 | fixp->fx_pcrel_adjust = 0; | |
1157 | } | |
1158 | if ((opcode->name[strlen (opcode->name) - 1]) == 'h' | |
1159 | && macroClipping) | |
1160 | { | |
1161 | fixp = fix_new_exp (frag_now, where, 2, &op_expr, FALSE, | |
1162 | BFD_RELOC_XGATE_IMM8_HI); | |
1163 | fixp->fx_pcrel_adjust = 0; | |
1164 | } | |
1165 | if (!fixp) | |
1166 | as_bad (_(":unknown relocation")); | |
1167 | } | |
1168 | else if (*op_constraint == '5') | |
1169 | { | |
1170 | fixp = fix_new_exp (frag_now, where, 2, &op_expr, FALSE, | |
1171 | BFD_RELOC_XGATE_IMM5); | |
1172 | fixp->fx_pcrel_adjust = 0; | |
1173 | } | |
1174 | else if (*op_constraint == '4') | |
1175 | { | |
1176 | fixp = fix_new_exp (frag_now, where, 2, &op_expr, FALSE, | |
1177 | BFD_RELOC_XGATE_IMM4); | |
1178 | fixp->fx_pcrel_adjust = 0; | |
1179 | } | |
1180 | else if (*op_constraint == '3') | |
1181 | { | |
1182 | fixp = fix_new_exp (frag_now, where, 2, &op_expr, FALSE, | |
1183 | BFD_RELOC_XGATE_IMM3); | |
1184 | fixp->fx_pcrel_adjust = 0; | |
1185 | } | |
1186 | else | |
1187 | { | |
1188 | as_bad (_(":unknown relocation constraint size")); | |
1189 | } | |
1190 | } | |
1191 | break; | |
1192 | ||
1193 | case 'c': /* CCR register expected. */ | |
1194 | if (*str == 'c' || *str == 'C') | |
1195 | { | |
1196 | *bit_width = 0; | |
1197 | str = extract_word (str, r_name, sizeof(r_name)); | |
1198 | if (!(strcmp (r_name, "ccr") || strcmp (r_name, "CCR"))) | |
1199 | as_bad (_(": expected register name ccr read %s "), r_name); | |
1200 | } | |
1201 | else | |
1202 | { | |
1203 | as_bad (_(": expected character c or C read %c"), *str); | |
1204 | } | |
1205 | break; | |
1206 | ||
1207 | case 'p': /* PC register expected. */ | |
1208 | if (*str == 'p' || *str == 'P') | |
1209 | { | |
1210 | *bit_width = 0; | |
1211 | str = extract_word (str, r_name, sizeof(r_name)); | |
1212 | if (!(strcmp (r_name, "pc") || strcmp (r_name, "PC"))) | |
1213 | as_bad (_(": expected register name pc read %s "), r_name); | |
1214 | } | |
1215 | else | |
1216 | { | |
1217 | as_bad (_(": expected character p or P read %c "), *str); | |
1218 | } | |
1219 | break; | |
1220 | ||
1221 | case 'b': /* Branch expected. */ | |
1222 | str = xgate_parse_exp (str, &op_expr); | |
1223 | (*op_con)++; | |
1224 | op_constraint++; | |
1225 | if (op_expr.X_op != O_register) | |
1226 | { | |
1227 | if (*op_constraint == '9') | |
1228 | { | |
1229 | /* mode == M68XG_OP_REL9 */ | |
1230 | fixp = fix_new_exp (frag_now, where, 2, &op_expr, TRUE, | |
1231 | R_XGATE_PCREL_9); | |
1232 | fixp->fx_pcrel_adjust = 1; | |
1233 | } | |
1234 | else if (*op_constraint == 'a') | |
1235 | { /* mode == M68XG_OP_REL10 */ | |
1236 | fixp = fix_new_exp (frag_now, where, 2, &op_expr, TRUE, | |
1237 | R_XGATE_PCREL_10); | |
1238 | fixp->fx_pcrel_adjust = 1; | |
1239 | } | |
1240 | } | |
1241 | else | |
1242 | { | |
1243 | as_fatal (_("Operand `%x' not recognized in fixup8."), op_expr.X_op); | |
1244 | } | |
1245 | break; | |
1246 | ||
1247 | case '?': | |
1248 | break; | |
1249 | ||
1250 | default: | |
1251 | as_bad (_("unknown constraint `%c'"), *op_constraint); | |
1252 | break; | |
1253 | } | |
1254 | *line = str; | |
1255 | return op_mask; | |
1256 | } | |
1257 | ||
1258 | unsigned int | |
1259 | xgate_detect_format (char *line_in) | |
1260 | { | |
1261 | char num_operands = 0; | |
1262 | char *str = skip_whitespace (line_in); | |
1263 | int i = 0; | |
1264 | int j = 0; | |
1265 | char c = 0; | |
1266 | unsigned int stripped_length = 0; | |
1267 | char sh_format[10] = | |
1268 | { 0 }; /* Shorthand format. */ | |
1269 | char operands_stripped[3][20] = | |
1270 | { | |
1271 | { 0 } | |
1272 | }; | |
1273 | /* Strings. TODO maybe structure this. */ | |
1274 | char *i_string = | |
1275 | { "i" }; | |
1276 | char *r_string = | |
1277 | { "r" }; | |
1278 | char *r_r_string = | |
1279 | { "r,r" }; | |
1280 | char *r_r_r_string = | |
1281 | { "r,r,r" }; | |
1282 | char *r_i_string = | |
1283 | { "r,i" }; | |
1284 | char *r_c_string = | |
1285 | { "r,c" }; | |
1286 | char *c_r_string = | |
1287 | { "c,r" }; | |
1288 | char *r_p_string = | |
1289 | { "r,p" }; | |
1290 | char *r_r_i_string = | |
1291 | { "r,r,i" }; | |
1292 | ||
1293 | /* If the length is zero this is an inherent instruction. */ | |
1294 | if (strlen (str) == 0) | |
1295 | return XG_INH; | |
1296 | ||
1297 | for (i = 0, j = 0, num_operands = 1; (c = TOLOWER (*str)) != 0; str++) | |
1298 | { | |
1299 | if (c == ' ' || c == '\t' || c == '(' || c == ')' || c == '-' || c == '+') | |
1300 | continue; | |
1301 | ||
1302 | if (c == ',') | |
1303 | { | |
1304 | j++; | |
1305 | num_operands++; | |
1306 | i = 0; | |
1307 | continue; | |
1308 | } | |
1309 | ||
1310 | if (i > MAX_DETECT_CHARS) | |
1311 | continue; | |
1312 | ||
1313 | operands_stripped[j][i++] = c; | |
1314 | } | |
1315 | ||
1316 | /* Process our substrings to see what we have. */ | |
1317 | for (i = 0, j = 0; num_operands > i; i++) | |
1318 | { | |
1319 | stripped_length = strlen (&operands_stripped[i][0]); | |
1320 | ||
1321 | /* Add separator if we have more than one operand. */ | |
1322 | if (i > 0) | |
1323 | sh_format[j++] = ','; | |
1324 | ||
1325 | /* Try to process by length first. */ | |
1326 | if (stripped_length > 3) | |
1327 | { | |
1328 | sh_format[j++] = 'i'; | |
1329 | } | |
1330 | else if (stripped_length == 1) | |
1331 | { | |
1332 | sh_format[j++] = 'i'; | |
1333 | } | |
1334 | else if (stripped_length == 2) | |
1335 | { | |
1336 | if (operands_stripped[i][0] | |
1337 | == 'r' && ISDIGIT (operands_stripped[i][1])) | |
1338 | { | |
1339 | sh_format[j++] = 'r'; | |
1340 | } | |
1341 | else if (operands_stripped[i][0] == 'p' | |
1342 | && operands_stripped[i][1] == 'c') | |
1343 | { | |
1344 | sh_format[j++] = 'p'; | |
1345 | } | |
1346 | else | |
1347 | { | |
1348 | sh_format[j++] = 'i'; | |
1349 | } | |
1350 | } | |
1351 | else if (stripped_length == 3) | |
1352 | { | |
1353 | if (operands_stripped[i][0] == 'c' | |
1354 | && (operands_stripped[i][1] == 'c' | |
1355 | && operands_stripped[i][2] == 'r')) | |
1356 | { | |
1357 | sh_format[j++] = 'c'; | |
1358 | } | |
1359 | else if (operands_stripped[i][0] == '#') | |
1360 | { | |
1361 | sh_format[j++] = 'i'; | |
1362 | } | |
1363 | else | |
1364 | { | |
1365 | sh_format[j++] = 'i'; | |
1366 | } | |
1367 | } | |
1368 | else /* default to immediate */ | |
1369 | { | |
1370 | sh_format[j++] = 'i'; | |
1371 | } | |
1372 | } | |
1373 | ||
1374 | /* See if we have a match. */ | |
1375 | if (!strcmp (i_string, sh_format) && num_operands == 1) | |
1376 | return XG_I; | |
1377 | if (!strcmp (r_i_string, sh_format) && num_operands == 2) | |
1378 | return XG_R_I; | |
1379 | if (!strcmp (r_r_r_string, sh_format) && num_operands == 3) | |
1380 | return XG_R_R_R; | |
1381 | if (!strcmp (r_r_string, sh_format) && num_operands == 2) | |
1382 | return XG_R_R; | |
1383 | if (!strcmp (r_string, sh_format) && num_operands == 1) | |
1384 | return XG_R; | |
1385 | if (!strcmp (r_c_string, sh_format) && num_operands == 2) | |
1386 | return XG_R_C; | |
1387 | if (!strcmp (c_r_string, sh_format) && num_operands == 2) | |
1388 | return XG_C_R; | |
1389 | if (!strcmp (r_p_string, sh_format) && num_operands == 2) | |
1390 | return XG_R_P; | |
1391 | if (!strcmp (r_r_i_string, sh_format) && num_operands == 3) | |
1392 | return XG_R_R_I; | |
1393 | ||
1394 | return 0; | |
1395 | } | |
1396 | ||
1397 | static struct xgate_opcode * | |
1398 | xgate_find_match (struct xgate_opcode_handle *opcode_handle, | |
1399 | int numberOfModes, | |
1400 | unsigned int sh_format) | |
1401 | { | |
1402 | int i; | |
1403 | ||
1404 | if (numberOfModes == 0) | |
1405 | return opcode_handle->opc0[0]; | |
1406 | ||
1407 | for (i = 0; i <= numberOfModes; i++) | |
1408 | if (opcode_handle->opc0[i]->sh_format & sh_format) | |
1409 | return opcode_handle->opc0[i]; | |
1410 | ||
1411 | return NULL; | |
1412 | } |