Commit | Line | Data |
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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 | ||
3879925e SK |
36 | #define SIXTEENTH_BIT 0x8000 |
37 | #define N_BITS_IN_WORD 16 | |
38 | #define MAX_NUM_OPERANDS 3 | |
f6c1a2d5 NC |
39 | |
40 | /* #define STATE_CONDITIONAL_BRANCH (1) */ | |
41 | #define STATE_PC_RELATIVE (2) | |
42 | #define REGISTER_P(ptr) (ptr == 'r') | |
43 | #define INCREMENT 01 | |
44 | #define DECREMENT 02 | |
45 | #define MAXREGISTER 07 | |
46 | #define MINREGISTER 00 | |
47 | ||
48 | #define OPTION_MMCU 'm' | |
49 | ||
50 | /* This macro has no side-effects. */ | |
51 | #define ENCODE_RELAX(what,length) (((what) << 2) + (length)) | |
52 | ||
19f55fe4 SK |
53 | /* Each unique opcode name has a handle. That handle may |
54 | contain pointers to opcodes with the same name but | |
55 | different address modes. */ | |
f6c1a2d5 NC |
56 | struct xgate_opcode_handle |
57 | { | |
58 | int number_of_modes; | |
59 | char *name; | |
60 | struct xgate_opcode *opc0[MAX_OPCODES]; | |
61 | }; | |
62 | ||
3879925e SK |
63 | /* XGATE's registers all are 16-bit general purpose. They are numbered according to the specifications. */ |
64 | typedef enum register_id | |
65 | { | |
66 | REG_NONE = -1, | |
67 | REG_R0 = 0, | |
68 | REG_R1 = 1, | |
69 | REG_R2 = 2, | |
70 | REG_R3 = 3, | |
71 | REG_R4 = 4, | |
72 | REG_R5 = 5, | |
73 | REG_R6 = 6, | |
74 | REG_R7 = 7, | |
75 | REG_PC = 8, | |
76 | REG_CCR = 9 | |
77 | } register_id; | |
78 | ||
79 | /* Operand Modifiers */ | |
80 | typedef enum op_modifiers | |
81 | { | |
82 | MOD_NONE = -1, | |
83 | MOD_POSTINC = 1, | |
84 | MOD_PREDEC = 2, | |
85 | MOD_CONSTANT = 3, | |
86 | MOD_LOAD_HIGH = 4, | |
87 | MOD_LOAD_LOW = 5 | |
88 | }op_modifiers; | |
89 | ||
90 | typedef struct s_operand | |
91 | { | |
92 | expressionS exp; | |
93 | register_id reg; | |
94 | op_modifiers mod; | |
95 | } s_operand; | |
96 | ||
97 | ||
f6c1a2d5 NC |
98 | /* LOCAL FUNCTIONS */ |
99 | static char * | |
100 | xgate_parse_exp (char *, expressionS *); | |
101 | static inline char * | |
102 | skip_whitespace (char *); | |
103 | static void | |
104 | get_default_target (void); | |
105 | static char * | |
106 | extract_word (char *, char *, int); | |
107 | static char * | |
108 | xgate_new_instruction (int size); | |
109 | unsigned short | |
110 | xgate_apply_operand (unsigned short, unsigned short *, unsigned short, | |
111 | unsigned char); | |
f6c1a2d5 NC |
112 | static struct xgate_opcode * |
113 | xgate_find_match (struct xgate_opcode_handle *, int, unsigned int); | |
114 | static int | |
115 | cmp_opcode (struct xgate_opcode *, struct xgate_opcode *); | |
f6c1a2d5 NC |
116 | void |
117 | xgate_print_syntax (char *); | |
118 | void | |
119 | xgate_print_table (void); | |
3879925e SK |
120 | unsigned int |
121 | xgate_get_operands (char *, s_operand []); | |
122 | static register_id | |
123 | reg_name_search (char *); | |
124 | op_modifiers | |
125 | xgate_determine_hi_low(char **); | |
126 | op_modifiers | |
127 | xgate_determine_increment(char **); | |
128 | ||
129 | void | |
130 | xgate_scan_operands (struct xgate_opcode *opcode, s_operand []); | |
131 | ||
132 | static unsigned int | |
133 | xgate_parse_operand (struct xgate_opcode *, int *, int where, char **, | |
134 | s_operand); | |
f6c1a2d5 NC |
135 | |
136 | /* LOCAL DATA */ | |
137 | static struct hash_control *xgate_hash; | |
138 | ||
139 | /* Previous opcode. */ | |
140 | static unsigned int prev = 0; | |
141 | ||
142 | static unsigned char fixup_required = 0; | |
143 | ||
144 | /* Used to enable clipping of 16 bit operands into 8 bit constraints. */ | |
145 | static unsigned char macroClipping = 0; | |
146 | ||
147 | static char oper_check; | |
148 | static char flag_print_insn_syntax = 0; | |
149 | static char flag_print_opcodes = 0; | |
150 | ||
151 | static int current_architecture; | |
152 | static const char *default_cpu; | |
153 | ||
154 | /* ELF flags to set in the output file header. */ | |
155 | static int elf_flags = E_XGATE_F64; | |
156 | ||
157 | /* This table describes how you change sizes for the various types of variable | |
158 | size expressions. This version only supports two kinds. */ | |
159 | ||
160 | /* The fields are: | |
161 | How far Forward this mode will reach. | |
162 | How far Backward this mode will reach. | |
163 | How many bytes this mode will add to the size of the frag. | |
164 | Which mode to go to if the offset won't fit in this one. */ | |
165 | ||
166 | relax_typeS md_relax_table[] = | |
167 | { | |
168 | {1, 1, 0, 0}, /* First entries aren't used. */ | |
169 | {1, 1, 0, 0}, /* For no good reason except. */ | |
170 | {1, 1, 0, 0}, /* that the VAX doesn't either. */ | |
171 | {1, 1, 0, 0}, | |
172 | /* XGATE 9 and 10 bit pc rel todo complete and test */ | |
173 | /*{(511), (-512), 0, ENCODE_RELAX (STATE_PC_RELATIVE, STATE_WORD)}, | |
174 | {(1023), (-1024), 0, ENCODE_RELAX (STATE_PC_RELATIVE, STATE_WORD)}, */ | |
175 | {0, 0, 0, 0} | |
176 | }; | |
177 | ||
f6c1a2d5 NC |
178 | /* This table describes all the machine specific pseudo-ops the assembler |
179 | has to support. The fields are: pseudo-op name without dot function to | |
180 | call to execute this pseudo-op Integer arg to pass to the function. */ | |
181 | const pseudo_typeS md_pseudo_table[] = | |
182 | { | |
183 | /* The following pseudo-ops are supported for MRI compatibility. */ | |
184 | {0, 0, 0} | |
185 | }; | |
186 | ||
187 | const char *md_shortopts = "m:"; | |
188 | ||
189 | struct option md_longopts[] = | |
190 | { | |
191 | #define OPTION_PRINT_INSN_SYNTAX (OPTION_MD_BASE + 0) | |
192 | { "print-insn-syntax", no_argument, NULL, OPTION_PRINT_INSN_SYNTAX }, | |
193 | ||
194 | #define OPTION_PRINT_OPCODES (OPTION_MD_BASE + 1) | |
195 | { "print-opcodes", no_argument, NULL, OPTION_PRINT_OPCODES }, | |
196 | ||
197 | #define OPTION_GENERATE_EXAMPLE (OPTION_MD_BASE + 2) | |
198 | { "generate-example", no_argument, NULL, OPTION_GENERATE_EXAMPLE }, | |
199 | ||
200 | #define OPTION_MSHORT (OPTION_MD_BASE + 3) | |
201 | { "mshort", no_argument, NULL, OPTION_MSHORT }, | |
202 | ||
203 | #define OPTION_MLONG (OPTION_MD_BASE + 4) | |
204 | { "mlong", no_argument, NULL, OPTION_MLONG }, | |
205 | ||
206 | #define OPTION_MSHORT_DOUBLE (OPTION_MD_BASE + 5) | |
207 | { "mshort-double", no_argument, NULL, OPTION_MSHORT_DOUBLE }, | |
208 | ||
209 | #define OPTION_MLONG_DOUBLE (OPTION_MD_BASE + 6) | |
210 | { "mlong-double", no_argument, NULL, OPTION_MLONG_DOUBLE }, | |
211 | ||
212 | { NULL, no_argument, NULL, 0 } | |
213 | }; | |
214 | ||
215 | size_t md_longopts_size = sizeof(md_longopts); | |
216 | ||
217 | char * | |
218 | md_atof (int type, char *litP, int *sizeP) | |
219 | { | |
220 | return ieee_md_atof (type, litP, sizeP, TRUE); | |
221 | } | |
222 | ||
223 | int | |
224 | md_parse_option (int c, char *arg) | |
225 | { | |
226 | switch (c) | |
227 | { | |
228 | case OPTION_MMCU: | |
229 | if (strcasecmp (arg, "v1") == 0) | |
230 | current_architecture = XGATE_V1; | |
231 | else if (strcasecmp (arg, "v2") == 0) | |
232 | current_architecture = XGATE_V2; | |
233 | else if (strcasecmp (arg, "v3") == 0) | |
234 | current_architecture = XGATE_V3; | |
235 | else | |
236 | as_bad (_(" architecture variant invalid")); | |
237 | break; | |
238 | ||
239 | case OPTION_PRINT_INSN_SYNTAX: | |
240 | flag_print_insn_syntax = 1; | |
241 | break; | |
242 | ||
243 | case OPTION_PRINT_OPCODES: | |
244 | flag_print_opcodes = 1; | |
245 | break; | |
246 | ||
247 | case OPTION_GENERATE_EXAMPLE: | |
248 | flag_print_opcodes = 2; | |
249 | break; | |
250 | ||
251 | case OPTION_MSHORT: | |
252 | elf_flags &= ~E_XGATE_I32; | |
253 | break; | |
254 | ||
255 | case OPTION_MLONG: | |
256 | elf_flags |= E_XGATE_I32; | |
257 | break; | |
258 | ||
259 | case OPTION_MSHORT_DOUBLE: | |
260 | elf_flags &= ~E_XGATE_F64; | |
261 | break; | |
262 | ||
263 | case OPTION_MLONG_DOUBLE: | |
264 | elf_flags |= E_XGATE_F64; | |
265 | break; | |
266 | ||
267 | default: | |
268 | return 0; | |
269 | } | |
270 | return 1; | |
271 | } | |
272 | ||
273 | const char * | |
274 | xgate_arch_format (void) | |
275 | { | |
276 | get_default_target (); | |
277 | ||
278 | if (current_architecture & cpuxgate) | |
279 | return "elf32-xgate"; | |
280 | ||
281 | return "error"; | |
282 | } | |
283 | ||
284 | static void | |
285 | get_default_target (void) | |
286 | { | |
287 | const bfd_target *target; | |
288 | bfd abfd; | |
289 | ||
290 | if (current_architecture != 0) | |
291 | return; | |
292 | ||
293 | default_cpu = "unknown"; | |
294 | target = bfd_find_target (0, &abfd); | |
295 | ||
296 | if (target && target->name) | |
297 | { | |
298 | if (strcmp (target->name, "elf32-xgate") == 0) | |
299 | { | |
300 | current_architecture = cpuxgate; | |
301 | default_cpu = "XGATE V1"; | |
302 | return; | |
303 | } | |
304 | ||
305 | as_bad (_("Default target `%s' is not supported."), target->name); | |
306 | } | |
307 | } | |
308 | ||
309 | void | |
310 | md_begin (void) | |
311 | { | |
312 | struct xgate_opcode *xgate_opcode_ptr = NULL; | |
313 | struct xgate_opcode *xgate_op_table = NULL; | |
314 | struct xgate_opcode_handle *op_handles = 0; | |
315 | char *prev_op_name = 0; | |
316 | int handle_enum = 0; | |
19f55fe4 | 317 | int number_of_op_handles = 0; |
f6c1a2d5 NC |
318 | int i, j = 0; |
319 | ||
320 | /* Create a local copy of our opcode table | |
321 | including an extra line for NULL termination. */ | |
322 | xgate_op_table = (struct xgate_opcode *) | |
19f55fe4 | 323 | xmalloc ((xgate_num_opcodes) * sizeof (struct xgate_opcode)); |
f6c1a2d5 NC |
324 | |
325 | memset (xgate_op_table, 0, | |
19f55fe4 | 326 | sizeof(struct xgate_opcode) * (xgate_num_opcodes)); |
f6c1a2d5 NC |
327 | |
328 | for (xgate_opcode_ptr = (struct xgate_opcode*) xgate_opcodes, i = 0; | |
329 | i < xgate_num_opcodes; i++) | |
330 | xgate_op_table[i] = xgate_opcode_ptr[i]; | |
331 | ||
332 | qsort (xgate_op_table, xgate_num_opcodes, sizeof(struct xgate_opcode), | |
333 | (int (*)(const void *, const void *)) cmp_opcode); | |
334 | ||
335 | /* Calculate number of handles since this will be | |
336 | smaller than the raw number of opcodes in the table. */ | |
19f55fe4 SK |
337 | prev_op_name = ""; |
338 | for (xgate_opcode_ptr = xgate_op_table, i = 0; i < xgate_num_opcodes; | |
339 | xgate_opcode_ptr++, i++) | |
f6c1a2d5 | 340 | { |
19f55fe4 SK |
341 | if (strcmp (prev_op_name, xgate_opcode_ptr->name)) |
342 | number_of_op_handles++; | |
f6c1a2d5 NC |
343 | prev_op_name = xgate_opcode_ptr->name; |
344 | } | |
345 | ||
346 | op_handles = (struct xgate_opcode_handle *) | |
19f55fe4 | 347 | xmalloc (sizeof(struct xgate_opcode_handle) * (number_of_op_handles)); |
f6c1a2d5 | 348 | |
19f55fe4 | 349 | /* Insert unique opcode names into hash table, aliasing duplicates. */ |
f6c1a2d5 NC |
350 | xgate_hash = hash_new (); |
351 | ||
19f55fe4 | 352 | prev_op_name = ""; |
f6c1a2d5 | 353 | for (xgate_opcode_ptr = xgate_op_table, i = 0, j = 0; i < xgate_num_opcodes; |
19f55fe4 | 354 | i++, xgate_opcode_ptr++) |
f6c1a2d5 | 355 | { |
19f55fe4 SK |
356 | if (!strcmp (prev_op_name, xgate_opcode_ptr->name)) |
357 | { | |
358 | handle_enum++; | |
359 | op_handles[j].opc0[handle_enum] = xgate_opcode_ptr; | |
360 | } | |
361 | else | |
f6c1a2d5 NC |
362 | { |
363 | handle_enum = 0; | |
364 | if (i) | |
19f55fe4 | 365 | j++; |
f6c1a2d5 NC |
366 | op_handles[j].name = xgate_opcode_ptr->name; |
367 | op_handles[j].opc0[0] = xgate_opcode_ptr; | |
19f55fe4 SK |
368 | hash_insert (xgate_hash, (char *) op_handles[j].name, |
369 | (char *) &(op_handles[j])); | |
f6c1a2d5 NC |
370 | } |
371 | op_handles[j].number_of_modes = handle_enum; | |
372 | prev_op_name = op_handles[j].name; | |
373 | } | |
374 | ||
f6c1a2d5 NC |
375 | if (flag_print_opcodes == 1) |
376 | xgate_print_table (); | |
377 | } | |
378 | ||
379 | void | |
380 | xgate_init_after_args (void) | |
381 | { | |
382 | } | |
383 | ||
384 | void | |
385 | md_show_usage (FILE * stream) | |
386 | { | |
387 | get_default_target (); | |
388 | ||
389 | fprintf ( | |
390 | stream, | |
391 | _("\ | |
392 | Freescale XGATE co-processor options:\n \ | |
393 | -mshort use 16-bit int ABI (default)\n \ | |
394 | -mlong use 32-bit int ABI\n \ | |
395 | -mshort-double use 32-bit double ABI\n \ | |
396 | -mlong-double use 64-bit double ABI (default)\n\ | |
397 | --mxgate specify the processor variant[default %s]\n\ | |
398 | --print-insn-syntax print the syntax of instruction in case of error\n\ | |
399 | --print-opcodes print the list of instructions with syntax\n\ | |
400 | --generate-example generate an example of each instruction"), | |
401 | default_cpu); | |
402 | } | |
403 | ||
404 | enum bfd_architecture | |
405 | xgate_arch (void) | |
406 | { | |
407 | get_default_target (); | |
408 | return bfd_arch_xgate; | |
409 | } | |
410 | ||
411 | int | |
412 | xgate_mach (void) | |
413 | { | |
414 | return 0; | |
415 | } | |
416 | ||
417 | void | |
418 | xgate_print_syntax (char *name) | |
419 | { | |
420 | int i; | |
421 | ||
422 | for (i = 0; i < xgate_num_opcodes; i++) | |
423 | { | |
424 | if (!strcmp (xgate_opcodes[i].name, name)) | |
425 | { | |
426 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_IDR)) | |
427 | printf ("\tFormat is %s\tRx, Rx, Rx+|-Rx|Rx\n", | |
428 | xgate_opcodes[i].name); | |
429 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_INH)) | |
430 | printf ("\tFormat is %s\n", xgate_opcodes[i].name); | |
431 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_TRI)) | |
432 | printf ("\tFormat is %s\tRx, Rx, Rx\n", xgate_opcodes[i].name); | |
433 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_DYA)) | |
434 | printf ("\tFormat is %s\tRx, Rx\n", xgate_opcodes[i].name); | |
f6c1a2d5 NC |
435 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_IMM3)) |
436 | printf ("\tFormat is %s\t<3-bit value>\n", xgate_opcodes[i].name); | |
437 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_IMM4)) | |
438 | printf ("\tFormat is %s\t<4 -bit value>\n", xgate_opcodes[i].name); | |
439 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_IMM8)) | |
440 | printf ("\tFormat is %s\tRx, <8-bit value>\n", | |
441 | xgate_opcodes[i].name); | |
442 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_IMM16)) | |
443 | printf ("\tFormat is %s\tRx, <16-bit value>\n", | |
444 | xgate_opcodes[i].name); | |
445 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_MON_R_C)) | |
446 | printf ("\tFormat is %s\tRx, CCR\n", xgate_opcodes[i].name); | |
447 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_MON_C_R)) | |
448 | printf ("\tFormat is %s\tCCR, Rx\n", xgate_opcodes[i].name); | |
449 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_MON_R_P)) | |
450 | printf ("\tFormat is %s\tRx, PC\n", xgate_opcodes[i].name); | |
451 | if (!strcmp (xgate_opcodes[i].constraints, XGATE_OP_IMM16mLDW)) | |
452 | printf ("\tFormat is %s\tRx, <16-bit value>\n", | |
453 | xgate_opcodes[i].name); | |
454 | } | |
455 | } | |
456 | } | |
457 | ||
458 | void | |
459 | xgate_print_table (void) | |
460 | { | |
461 | int i; | |
462 | ||
463 | for (i = 0; i < xgate_num_opcodes; i++) | |
464 | xgate_print_syntax (xgate_opcodes[i].name); | |
465 | ||
466 | return; | |
467 | } | |
468 | ||
469 | const char * | |
470 | xgate_listing_header (void) | |
471 | { | |
472 | if (current_architecture & cpuxgate) | |
473 | return "XGATE GAS "; | |
474 | ||
475 | return "ERROR MC9S12X GAS "; | |
476 | } | |
477 | ||
478 | symbolS * | |
479 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) | |
480 | { | |
481 | return 0; | |
482 | } | |
483 | ||
484 | /* GAS will call this function for each section at the end of the assembly, | |
485 | to permit the CPU backend to adjust the alignment of a section. */ | |
486 | ||
487 | valueT | |
488 | md_section_align (asection * seg, valueT addr) | |
489 | { | |
490 | int align = bfd_get_section_alignment (stdoutput, seg); | |
491 | return ((addr + (1 << align) - 1) & (-1 << align)); | |
492 | } | |
493 | ||
494 | void | |
495 | md_assemble (char *input_line) | |
496 | { | |
497 | struct xgate_opcode *opcode = 0; | |
498 | struct xgate_opcode *macro_opcode = 0; | |
499 | struct xgate_opcode_handle *opcode_handle = 0; | |
500 | /* Caller expects it to be returned as it was passed. */ | |
501 | char *saved_input_line = input_line; | |
502 | char op_name[9] = { 0 }; | |
503 | unsigned int sh_format = 0; | |
504 | char *p = 0; | |
505 | ||
3879925e SK |
506 | s_operand new_operands[MAX_NUM_OPERANDS]; |
507 | ||
f6c1a2d5 NC |
508 | fixup_required = 0; |
509 | oper_check = 0; /* set error flags */ | |
510 | input_line = extract_word (input_line, op_name, sizeof(op_name)); | |
511 | ||
512 | /* Check to make sure we are not reading a bogus line. */ | |
513 | if (!op_name[0]) | |
514 | as_bad (_("opcode missing or not found on input line")); | |
515 | ||
516 | if (!(opcode_handle = (struct xgate_opcode_handle *) hash_find (xgate_hash, | |
517 | op_name))) | |
518 | { | |
519 | as_bad (_("opcode %s not found in opcode hash table"), op_name); | |
520 | } | |
521 | else | |
522 | { | |
3879925e SK |
523 | /* Parse operands so we can find the proper opcode bin. */ |
524 | ||
525 | sh_format = xgate_get_operands(input_line, new_operands); | |
f6c1a2d5 NC |
526 | |
527 | opcode = xgate_find_match (opcode_handle, opcode_handle->number_of_modes, | |
528 | sh_format); | |
529 | ||
530 | if (!opcode) | |
531 | { | |
532 | as_bad (_("matching operands to opcode ")); | |
533 | xgate_print_syntax (opcode_handle->opc0[0]->name); | |
534 | } | |
535 | else if (opcode->size == 2) | |
536 | { | |
537 | /* Size is one word - assemble that native insn. */ | |
3879925e | 538 | xgate_scan_operands (opcode, new_operands); |
f6c1a2d5 NC |
539 | } |
540 | else | |
541 | { | |
542 | /* Insn is a simplified instruction - expand it out. */ | |
543 | macroClipping = 1; | |
544 | unsigned int i; | |
545 | ||
546 | /* skip past our ';' separator. */ | |
547 | for (i = strlen (opcode->constraints), p = opcode->constraints; i > 0; | |
548 | i--, p++) | |
549 | { | |
550 | if (*p == ';') | |
551 | { | |
552 | p++; | |
553 | break; | |
554 | } | |
555 | } | |
556 | input_line = skip_whitespace (input_line); | |
557 | char *macro_inline = input_line; | |
558 | ||
559 | /* Loop though the macro's opcode list and apply operands to each real opcode. */ | |
560 | for (i = 0; *p && i < (opcode->size / 2); i++) | |
561 | { | |
562 | /* Loop though macro operand list. */ | |
563 | input_line = macro_inline; /* Rewind. */ | |
564 | p = extract_word (p, op_name, 10); | |
565 | ||
566 | if (!(opcode_handle = (struct xgate_opcode_handle *) | |
567 | hash_find (xgate_hash, op_name))) | |
568 | { | |
569 | as_bad ( | |
570 | _(": processing macro, real opcode handle not found in hash")); | |
571 | break; | |
572 | } | |
573 | else | |
574 | { | |
3879925e | 575 | sh_format = xgate_get_operands(input_line, new_operands); |
f6c1a2d5 NC |
576 | macro_opcode = xgate_find_match (opcode_handle, |
577 | opcode_handle->number_of_modes, sh_format); | |
3879925e SK |
578 | xgate_scan_operands (macro_opcode, new_operands); |
579 | ||
f6c1a2d5 NC |
580 | } |
581 | } | |
582 | } | |
583 | } | |
584 | macroClipping = 0; | |
585 | input_line = saved_input_line; | |
586 | } | |
587 | ||
588 | /* Force truly undefined symbols to their maximum size, and generally set up | |
589 | the frag list to be relaxed. */ | |
590 | ||
591 | int | |
592 | md_estimate_size_before_relax (fragS *fragp, asection *seg) | |
593 | { | |
594 | /* If symbol is undefined or located in a different section, | |
595 | select the largest supported relocation. */ | |
596 | relax_substateT subtype; | |
597 | relax_substateT rlx_state[] = | |
598 | { 0, 2 }; | |
599 | ||
600 | for (subtype = 0; subtype < ARRAY_SIZE (rlx_state); subtype += 2) | |
601 | { | |
602 | if (fragp->fr_subtype == rlx_state[subtype] | |
603 | && (!S_IS_DEFINED (fragp->fr_symbol) | |
604 | || seg != S_GET_SEGMENT (fragp->fr_symbol))) | |
605 | { | |
606 | fragp->fr_subtype = rlx_state[subtype + 1]; | |
607 | break; | |
608 | } | |
609 | } | |
610 | ||
611 | if (fragp->fr_subtype >= ARRAY_SIZE (md_relax_table)) | |
612 | abort (); | |
613 | ||
614 | return md_relax_table[fragp->fr_subtype].rlx_length; | |
615 | } | |
616 | ||
617 | ||
618 | /* Relocation, relaxation and frag conversions. */ | |
619 | ||
620 | /* PC-relative offsets are relative to the start of the | |
621 | next instruction. That is, the address of the offset, plus its | |
622 | size, since the offset is always the last part of the insn. */ | |
623 | ||
624 | long | |
625 | md_pcrel_from (fixS * fixP) | |
626 | { | |
627 | return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address; | |
628 | } | |
629 | ||
630 | /* If while processing a fixup, a reloc really needs to be created | |
631 | then it is done here. */ | |
632 | ||
633 | arelent * | |
634 | tc_gen_reloc (asection * section ATTRIBUTE_UNUSED, fixS * fixp) | |
635 | { | |
636 | arelent * reloc; | |
637 | ||
638 | reloc = (arelent *) xmalloc (sizeof(arelent)); | |
639 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof(asymbol *)); | |
640 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
641 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
642 | ||
643 | if (fixp->fx_r_type == 0) | |
644 | { | |
645 | reloc->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_16); | |
646 | } | |
647 | else | |
648 | { | |
649 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
650 | } | |
651 | ||
652 | if (reloc->howto == (reloc_howto_type *) NULL) | |
653 | { | |
654 | as_bad_where (fixp->fx_file, fixp->fx_line, _ | |
655 | ("Relocation %d is not supported by object file format."), | |
656 | (int) fixp->fx_r_type); | |
657 | return NULL; | |
658 | } | |
659 | ||
660 | /* Since we use Rel instead of Rela, encode the vtable entry to be | |
661 | used in the relocation's section offset. */ | |
662 | if (fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
663 | reloc->address = fixp->fx_offset; | |
664 | reloc->addend = 0; | |
665 | return reloc; | |
666 | } | |
667 | ||
668 | /* Patch the instruction with the resolved operand. Elf relocation | |
669 | info will also be generated to take care of linker/loader fixups. | |
670 | The XGATE addresses only 16-bit addresses.The BFD_RELOC_32 is necessary | |
671 | for the support of --gstabs. */ | |
672 | ||
673 | void | |
674 | md_apply_fix (fixS * fixP, valueT * valP, segT seg ATTRIBUTE_UNUSED) | |
675 | { | |
676 | char *where; | |
677 | long value = *valP; | |
678 | int opcode = 0; | |
679 | ldiv_t result; | |
680 | ||
681 | /* If the fixup is done mark it done so no further symbol resolution will take place. */ | |
682 | if (fixP->fx_addsy == (symbolS *) NULL) | |
683 | { | |
684 | fixP->fx_done = 1; | |
685 | } | |
686 | ||
687 | /* We don't actually support subtracting a symbol. */ | |
688 | if (fixP->fx_subsy != (symbolS *) NULL) | |
689 | as_bad_where (fixP->fx_file, fixP->fx_line, _("Expression too complex.")); | |
690 | ||
691 | where = fixP->fx_frag->fr_literal + fixP->fx_where; | |
692 | opcode = bfd_getl16 (where); | |
693 | int mask = 0; | |
694 | ||
695 | switch (fixP->fx_r_type) | |
696 | { | |
697 | case R_XGATE_PCREL_9: | |
698 | if (value < -512 || value > 511) | |
699 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
700 | _("Value %ld too large for 9-bit PC-relative branch."), value); | |
701 | result = ldiv (value, 2); /* from bytes to words */ | |
702 | value = result.quot; | |
703 | if (result.rem) | |
704 | as_bad_where (fixP->fx_file, fixP->fx_line, _ | |
705 | ("Value %ld not aligned by 2 for 9-bit PC-relative branch."), value); | |
706 | mask = 0x1FF; /* Clip into 8-bit field FIXME I'm sure there is a more proper place for this */ | |
707 | value &= mask; | |
708 | number_to_chars_bigendian (where, (opcode | value), 2); | |
709 | break; | |
710 | case R_XGATE_PCREL_10: | |
711 | if (value < -1024 || value > 1023) | |
712 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
713 | _("Value %ld too large for 10-bit PC-relative branch."), value); | |
714 | result = ldiv (value, 2); /* from bytes to words */ | |
715 | value = result.quot; | |
716 | if (result.rem) | |
717 | as_bad_where (fixP->fx_file, fixP->fx_line, _ | |
718 | ("Value %ld not aligned by 2 for 10-bit PC-relative branch."), value); | |
719 | mask = 0x3FF; /* Clip into 9-bit field FIXME I'm sure there is a more proper place for this */ | |
720 | value &= mask; | |
721 | number_to_chars_bigendian (where, (opcode | value), 2); | |
722 | break; | |
723 | case BFD_RELOC_XGATE_IMM8_HI: | |
724 | if (value < -65537 || value > 65535) | |
725 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
726 | _("Value out of 16-bit range.")); | |
727 | value >>= 8; | |
728 | value &= 0x00ff; | |
729 | bfd_putb16 ((bfd_vma) value | opcode, (void *) where); | |
730 | break; | |
731 | case BFD_RELOC_XGATE_24: | |
732 | case BFD_RELOC_XGATE_IMM8_LO: | |
733 | if (value < -65537 || value > 65535) | |
734 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
735 | _("Value out of 16-bit range.")); | |
736 | value &= 0x00ff; | |
737 | bfd_putb16 ((bfd_vma) value | opcode, (void *) where); | |
738 | break; | |
739 | case BFD_RELOC_XGATE_IMM3: | |
740 | if (value < 0 || value > 7) | |
741 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
742 | _("Value out of 3-bit range.")); | |
743 | value <<= 8; /* make big endian */ | |
744 | number_to_chars_bigendian (where, (opcode | value), 2); | |
745 | break; | |
746 | case BFD_RELOC_XGATE_IMM4: | |
747 | if (value < 0 || value > 15) | |
748 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
749 | _("Value out of 4-bit range.")); | |
750 | value <<= 4; /* align the operand bits */ | |
751 | number_to_chars_bigendian (where, (opcode | value), 2); | |
752 | break; | |
753 | case BFD_RELOC_XGATE_IMM5: | |
754 | if (value < 0 || value > 31) | |
755 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
756 | _("Value out of 5-bit range.")); | |
757 | value <<= 5; /* align the operand bits */ | |
758 | number_to_chars_bigendian (where, (opcode | value), 2); | |
759 | break; | |
760 | case BFD_RELOC_8: | |
761 | ((bfd_byte *) where)[0] = (bfd_byte) value; | |
762 | break; | |
763 | case BFD_RELOC_32: | |
764 | bfd_putb32 ((bfd_vma) value, (unsigned char *) where); | |
f6c1a2d5 NC |
765 | break; |
766 | case BFD_RELOC_16: | |
767 | bfd_putb16 ((bfd_vma) value, (unsigned char *) where); | |
768 | break; | |
769 | default: | |
770 | as_fatal (_("Line %d: unknown relocation type: 0x%x."), fixP->fx_line, | |
771 | fixP->fx_r_type); | |
772 | break; | |
773 | } | |
774 | } | |
775 | ||
776 | /* See whether we need to force a relocation into the output file. */ | |
777 | ||
778 | int | |
779 | tc_xgate_force_relocation (fixS * fixP) | |
780 | { | |
781 | if (fixP->fx_r_type == BFD_RELOC_XGATE_RL_GROUP) | |
782 | return 1; | |
783 | return generic_force_reloc (fixP); | |
784 | } | |
785 | ||
786 | /* Here we decide which fixups can be adjusted to make them relative | |
787 | to the beginning of the section instead of the symbol. Basically | |
788 | we need to make sure that the linker relaxation is done | |
789 | correctly, so in some cases we force the original symbol to be | |
790 | used. */ | |
791 | ||
792 | int | |
793 | tc_xgate_fix_adjustable (fixS * fixP) | |
794 | { | |
795 | switch (fixP->fx_r_type) | |
796 | { | |
797 | /* For the linker relaxation to work correctly, these relocs | |
798 | need to be on the symbol itself. */ | |
799 | case BFD_RELOC_16: | |
800 | case BFD_RELOC_XGATE_RL_JUMP: | |
801 | case BFD_RELOC_XGATE_RL_GROUP: | |
802 | case BFD_RELOC_VTABLE_INHERIT: | |
803 | case BFD_RELOC_VTABLE_ENTRY: | |
804 | case BFD_RELOC_32: | |
805 | return 0; | |
806 | default: | |
807 | return 1; | |
808 | } | |
809 | } | |
810 | ||
811 | void | |
812 | md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, | |
813 | asection * sec ATTRIBUTE_UNUSED, | |
814 | fragS * fragP ATTRIBUTE_UNUSED) | |
815 | { | |
816 | as_bad (("md_convert_frag not implemented yet")); | |
817 | abort (); | |
818 | } | |
819 | ||
820 | /* Set the ELF specific flags. */ | |
821 | ||
822 | void | |
823 | xgate_elf_final_processing (void) | |
824 | { | |
825 | elf_flags |= EF_XGATE_MACH; | |
826 | elf_elfheader (stdoutput)->e_flags &= ~EF_XGATE_ABI; | |
827 | elf_elfheader (stdoutput)->e_flags |= elf_flags; | |
828 | } | |
829 | ||
830 | static inline char * | |
831 | skip_whitespace (char *s) | |
832 | { | |
833 | while (*s == ' ' || *s == '\t' || *s == '(' || *s == ')') | |
834 | s++; | |
835 | ||
836 | return s; | |
837 | } | |
838 | ||
839 | /* Extract a word (continuous alpha-numeric chars) from the input line. */ | |
840 | ||
841 | static char * | |
842 | extract_word (char *from, char *to, int limit) | |
843 | { | |
844 | char *op_end; | |
845 | int size = 0; | |
846 | ||
847 | /* Drop leading whitespace. */ | |
848 | from = skip_whitespace (from); | |
849 | *to = 0; | |
850 | /* Find the op code end. */ | |
851 | for (op_end = from; *op_end != 0 && is_part_of_name (*op_end);) | |
852 | { | |
853 | to[size++] = *op_end++; | |
854 | if (size + 1 >= limit) | |
855 | break; | |
856 | } | |
857 | to[size] = 0; | |
858 | return op_end; | |
859 | } | |
860 | ||
861 | static char * | |
862 | xgate_new_instruction (int size) | |
863 | { | |
864 | char *f = frag_more (size); | |
865 | dwarf2_emit_insn (size); | |
866 | return f; | |
867 | } | |
868 | ||
869 | unsigned short | |
870 | xgate_apply_operand (unsigned short new_mask, | |
871 | unsigned short *availiable_mask_bits, | |
872 | unsigned short mask, | |
873 | unsigned char n_bits) | |
874 | { | |
875 | unsigned short n_shifts; | |
876 | unsigned int n_drop_bits; | |
877 | ||
878 | /* Shift until you find an available operand bit "1" and record the number of shifts. */ | |
879 | for (n_shifts = 0; | |
880 | !(*availiable_mask_bits & SIXTEENTH_BIT) && n_shifts < 16; | |
881 | n_shifts++) | |
882 | *availiable_mask_bits <<= 1; | |
883 | ||
884 | /* Shift for the number of bits your operand requires while bits are available. */ | |
885 | for (n_drop_bits = n_bits; | |
886 | n_drop_bits && (*availiable_mask_bits & SIXTEENTH_BIT); | |
887 | --n_drop_bits) | |
888 | *availiable_mask_bits <<= 1; | |
889 | ||
890 | if (n_drop_bits) | |
891 | as_bad (_(":operand has too many bits")); | |
892 | *availiable_mask_bits >>= n_shifts + n_bits; | |
893 | if ((n_drop_bits == 0) && (*availiable_mask_bits == 0)) | |
894 | { | |
895 | oper_check = 1; /* flag operand check as good */ | |
896 | } | |
897 | new_mask <<= N_BITS_IN_WORD - (n_shifts + n_bits); | |
898 | mask |= new_mask; | |
899 | return mask; | |
900 | } | |
901 | ||
902 | /* Parse ordinary expression. */ | |
903 | ||
904 | static char * | |
905 | xgate_parse_exp (char *s, expressionS * op) | |
906 | { | |
907 | input_line_pointer = s; | |
908 | expression(op); | |
909 | if (op->X_op == O_absent) | |
910 | as_bad (_("missing operand")); | |
911 | return input_line_pointer; | |
912 | } | |
913 | ||
3879925e SK |
914 | static int |
915 | cmp_opcode (struct xgate_opcode *op1, struct xgate_opcode *op2) | |
916 | { | |
917 | return strcmp (op1->name, op2->name); | |
918 | } | |
919 | ||
920 | static struct xgate_opcode * | |
921 | xgate_find_match (struct xgate_opcode_handle *opcode_handle, | |
922 | int numberOfModes, | |
923 | unsigned int sh_format) | |
924 | { | |
925 | int i; | |
f6c1a2d5 | 926 | |
3879925e SK |
927 | if (numberOfModes == 0) |
928 | return opcode_handle->opc0[0]; | |
929 | ||
930 | for (i = 0; i <= numberOfModes; i++) | |
931 | if (opcode_handle->opc0[i]->sh_format & sh_format) | |
932 | return opcode_handle->opc0[i]; | |
933 | ||
934 | return NULL; | |
935 | } | |
936 | ||
937 | /* Because we are dealing with two different core that view the system | |
938 | memory with different offsets, we must differentiate what core a | |
939 | symbol belongs to, in order for the linker to cross-link. */ | |
940 | ||
941 | int | |
942 | xgate_frob_symbol (symbolS *sym) | |
f6c1a2d5 | 943 | { |
3879925e SK |
944 | asymbol *bfdsym; |
945 | elf_symbol_type *elfsym; | |
f6c1a2d5 | 946 | |
3879925e SK |
947 | bfdsym = symbol_get_bfdsym (sym); |
948 | elfsym = elf_symbol_from (bfd_asymbol_bfd (bfdsym), bfdsym); | |
f6c1a2d5 | 949 | |
3879925e | 950 | gas_assert(elfsym); |
f6c1a2d5 | 951 | |
3879925e SK |
952 | /* Mark the symbol as being *from XGATE */ |
953 | elfsym->internal_elf_sym.st_target_internal = 1; | |
f6c1a2d5 | 954 | |
3879925e | 955 | return 0; |
f6c1a2d5 | 956 | } |
f6c1a2d5 | 957 | |
3879925e SK |
958 | unsigned int |
959 | xgate_get_operands (char *line, s_operand oprs[]) | |
f6c1a2d5 | 960 | { |
3879925e SK |
961 | int num_operands; |
962 | ||
963 | /* If there are no operands, then it must be inherent. */ | |
964 | if (*line == 0 || *line == '\n' || *line == '\r') | |
965 | return XG_INH; | |
966 | ||
967 | for (num_operands = 0; strlen (line) && (num_operands < MAX_NUM_OPERANDS); | |
968 | num_operands++) | |
969 | { | |
970 | line = skip_whitespace (line); | |
971 | if (*line == '#') | |
972 | line++; | |
973 | ||
974 | oprs[num_operands].mod = xgate_determine_hi_low (&line); | |
975 | oprs[num_operands].mod = xgate_determine_increment (&line); | |
976 | ||
977 | if ((oprs[num_operands].reg = reg_name_search (line)) == REG_NONE) | |
978 | line = xgate_parse_exp (line, &oprs[num_operands].exp); | |
979 | ||
980 | /* skip to next operand */ | |
981 | while (*line != 0) | |
982 | { | |
983 | if (*line == ',') | |
984 | { | |
985 | line++; | |
986 | break; | |
987 | } | |
988 | line++; | |
989 | } | |
990 | } | |
991 | ||
992 | if (num_operands > MAX_NUM_OPERANDS) | |
993 | return 0; | |
994 | ||
995 | switch (num_operands) | |
996 | { | |
997 | case 1: | |
998 | if (oprs[0].reg >= REG_R0 && oprs[0].reg <= REG_R7) | |
999 | return XG_R; | |
1000 | if (oprs[0].reg == REG_NONE) | |
1001 | return XG_I; | |
1002 | break; | |
1003 | case 2: | |
1004 | if (oprs[0].reg >= REG_R0 && oprs[0].reg <= REG_R7) | |
1005 | { | |
1006 | if (oprs[1].reg >= REG_R0 && oprs[1].reg <= REG_R7) | |
1007 | return XG_R_R; | |
1008 | if (oprs[1].reg == REG_CCR) | |
1009 | return XG_R_C; | |
1010 | if (oprs[1].reg == REG_PC) | |
1011 | return XG_R_P; | |
1012 | if (oprs[1].reg == REG_NONE) | |
1013 | return XG_R_I; | |
1014 | } | |
1015 | if (oprs[0].reg == REG_CCR) | |
1016 | return XG_C_R; | |
1017 | break; | |
1018 | case 3: | |
1019 | if (oprs[0].reg >= REG_R0 && oprs[0].reg <= REG_R7) | |
1020 | { | |
1021 | if (oprs[1].reg >= REG_R0 && oprs[1].reg <= REG_R7) | |
1022 | { | |
1023 | if (oprs[2].reg >= REG_R0 && oprs[2].reg <= REG_R7) | |
1024 | return XG_R_R_R; | |
1025 | if (oprs[2].reg >= REG_NONE) | |
1026 | return XG_R_R_I; | |
1027 | } | |
1028 | } | |
1029 | break; | |
1030 | default: | |
1031 | as_bad (_("unknown operand format")); | |
1032 | break; | |
1033 | } | |
1034 | ||
1035 | return 0; | |
1036 | } | |
1037 | ||
1038 | /* reg_name_search() finds the register number given its name. | |
1039 | Returns the register number or REG_NONE on failure. */ | |
1040 | static register_id | |
1041 | reg_name_search (char *name) | |
1042 | { | |
1043 | if (strncasecmp (name, "r0", 2) == 0) | |
1044 | return REG_R0; | |
1045 | if (strncasecmp (name, "r1", 2) == 0) | |
1046 | return REG_R1; | |
1047 | if (strncasecmp (name, "r2", 2) == 0) | |
1048 | return REG_R2; | |
1049 | if (strncasecmp (name, "r3", 2) == 0) | |
1050 | return REG_R3; | |
1051 | if (strncasecmp (name, "r4", 2) == 0) | |
1052 | return REG_R4; | |
1053 | if (strncasecmp (name, "r5", 2) == 0) | |
1054 | return REG_R5; | |
1055 | if (strncasecmp (name, "r6", 2) == 0) | |
1056 | return REG_R6; | |
1057 | if (strncasecmp (name, "r7", 2) == 0) | |
1058 | return REG_R7; | |
1059 | if (strncasecmp (name, "pc", 2) == 0) | |
1060 | return REG_PC; | |
1061 | if (strncasecmp (name, "ccr", 3) == 0) | |
1062 | return REG_CCR; | |
1063 | return REG_NONE; | |
1064 | } | |
1065 | ||
1066 | op_modifiers | |
1067 | xgate_determine_hi_low(char **line) | |
1068 | { | |
1069 | char *local_line = line[0]; | |
1070 | ||
1071 | if (strncasecmp (local_line, "%hi", 3) == 0) | |
1072 | { | |
1073 | *line += 3; | |
1074 | return MOD_LOAD_HIGH; | |
1075 | } | |
1076 | if (strncasecmp (local_line, "%lo", 3) == 0) | |
1077 | { | |
1078 | *line += 3; | |
1079 | return MOD_LOAD_LOW; | |
1080 | } | |
1081 | return MOD_NONE; | |
1082 | } | |
1083 | ||
1084 | op_modifiers | |
1085 | xgate_determine_increment(char **line) | |
1086 | { | |
1087 | char *local_line = line[0]; | |
1088 | ||
1089 | if (*(local_line + 2) == '+') | |
1090 | return MOD_POSTINC; | |
1091 | if (strncasecmp (local_line, "-r", 2) == 0) | |
1092 | { | |
1093 | *line += 1; | |
1094 | return MOD_PREDEC; | |
1095 | } | |
1096 | return MOD_NONE; | |
f6c1a2d5 NC |
1097 | } |
1098 | ||
1099 | /* Parse instruction operands. */ | |
1100 | ||
1101 | void | |
3879925e | 1102 | xgate_scan_operands (struct xgate_opcode *opcode, s_operand oprs[]) |
f6c1a2d5 NC |
1103 | { |
1104 | char *frag = xgate_new_instruction (opcode->size); | |
1105 | int where = frag - frag_now->fr_literal; | |
1106 | char *op = opcode->constraints; | |
1107 | unsigned int bin = (int) opcode->bin_opcode; | |
f6c1a2d5 NC |
1108 | unsigned short oper_mask = 0; |
1109 | int operand_bit_length = 0; | |
1110 | unsigned int operand = 0; | |
1111 | char n_operand_bits = 0; | |
1112 | char first_operand_equals_second = 0; | |
1113 | int i = 0; | |
1114 | char c = 0; | |
1115 | ||
1116 | /* Generate available operand bits mask. */ | |
1117 | for (i = 0; (c = opcode->format[i]); i++) | |
1118 | { | |
1119 | if (ISDIGIT (c) || (c == 's')) | |
1120 | { | |
1121 | oper_mask <<= 1; | |
1122 | } | |
1123 | else | |
1124 | { | |
1125 | oper_mask <<= 1; | |
1126 | oper_mask += 1; | |
1127 | n_operand_bits++; | |
1128 | } | |
1129 | } | |
1130 | ||
f6c1a2d5 NC |
1131 | /* Parse first operand. */ |
1132 | if (*op) | |
1133 | { | |
1134 | if (*op == '=') | |
1135 | { | |
1136 | first_operand_equals_second = 1; | |
1137 | ++op; | |
1138 | } | |
3879925e | 1139 | operand = xgate_parse_operand (opcode, &operand_bit_length, where, &op, oprs[0]); |
f6c1a2d5 NC |
1140 | ++op; |
1141 | bin = xgate_apply_operand (operand, &oper_mask, bin, operand_bit_length); | |
3879925e SK |
1142 | |
1143 | if(first_operand_equals_second) | |
1144 | bin = xgate_apply_operand (operand, &oper_mask, bin, operand_bit_length); | |
f6c1a2d5 NC |
1145 | /* Parse second operand. */ |
1146 | if (*op) | |
1147 | { | |
1148 | if (*op == ',') | |
1149 | ++op; | |
3879925e | 1150 | if (first_operand_equals_second) |
f6c1a2d5 | 1151 | { |
3879925e SK |
1152 | bin = xgate_apply_operand (operand, &oper_mask, bin, |
1153 | operand_bit_length); | |
1154 | ++op; | |
f6c1a2d5 NC |
1155 | } |
1156 | else | |
1157 | { | |
3879925e SK |
1158 | operand = xgate_parse_operand (opcode, &operand_bit_length, where, |
1159 | &op, oprs[1]); | |
f6c1a2d5 NC |
1160 | bin = xgate_apply_operand (operand, &oper_mask, bin, |
1161 | operand_bit_length); | |
1162 | ++op; | |
1163 | } | |
1164 | } | |
f6c1a2d5 NC |
1165 | /* Parse the third register. */ |
1166 | if (*op) | |
1167 | { | |
1168 | if (*op == ',') | |
1169 | ++op; | |
3879925e SK |
1170 | operand = xgate_parse_operand (opcode, &operand_bit_length, where, &op, |
1171 | oprs[2]); | |
f6c1a2d5 NC |
1172 | bin = xgate_apply_operand (operand, &oper_mask, bin, |
1173 | operand_bit_length); | |
1174 | } | |
1175 | } | |
1176 | if (opcode->size == 2 && fixup_required) | |
1177 | { | |
1178 | bfd_putl16 (bin, frag); | |
1179 | } | |
1180 | else if ((opcode->sh_format & XG_PCREL)) | |
1181 | { | |
1182 | /* Write our data to a frag for further processing. */ | |
3879925e | 1183 | bfd_putl16 (opcode->bin_opcode, frag); |
f6c1a2d5 NC |
1184 | } |
1185 | else | |
1186 | { | |
1187 | /* Apply operand mask(s)to bin opcode and write the output. */ | |
1188 | /* Since we are done write this frag in xgate BE format. */ | |
3879925e | 1189 | number_to_chars_bigendian (frag, bin, opcode->size); |
f6c1a2d5 NC |
1190 | } |
1191 | prev = bin; | |
f6c1a2d5 NC |
1192 | return; |
1193 | } | |
1194 | ||
1195 | static unsigned int | |
3879925e SK |
1196 | xgate_parse_operand (struct xgate_opcode *opcode, |
1197 | int *bit_width, | |
1198 | int where, | |
1199 | char **op_con, | |
1200 | s_operand operand_two) | |
f6c1a2d5 | 1201 | { |
f6c1a2d5 NC |
1202 | fixS *fixp = 0; |
1203 | char *op_constraint = *op_con; | |
1204 | unsigned int op_mask = 0; | |
f6c1a2d5 NC |
1205 | unsigned int pp_fix = 0; |
1206 | unsigned short max_size = 0; | |
1207 | int i; | |
1208 | ||
1209 | *bit_width = 0; | |
1210 | /* Reset. */ | |
1211 | ||
1212 | switch (*op_constraint) | |
1213 | { | |
1214 | case '+': /* Indexed register operand +/- or plain r. */ | |
f6c1a2d5 NC |
1215 | /* Default to neither inc or dec. */ |
1216 | pp_fix = 0; | |
1217 | *bit_width = 5; | |
3879925e SK |
1218 | |
1219 | if (operand_two.reg == REG_NONE) | |
1220 | as_bad (_(": expected register name r0-r7 ") ); | |
1221 | op_mask = operand_two.reg; | |
1222 | if(operand_two.mod == MOD_POSTINC) | |
1223 | pp_fix = INCREMENT; | |
1224 | if(operand_two.mod == MOD_PREDEC) | |
1225 | pp_fix = DECREMENT; | |
f6c1a2d5 NC |
1226 | op_mask <<= 2; |
1227 | op_mask |= pp_fix; | |
1228 | break; | |
1229 | ||
1230 | case 'r': /* Register operand. */ | |
3879925e SK |
1231 | if (operand_two.reg == REG_NONE) |
1232 | as_bad (_(": expected register name r0-r7 ")); | |
1233 | ||
1234 | *bit_width = 3; | |
1235 | ||
1236 | op_mask = operand_two.reg; | |
f6c1a2d5 NC |
1237 | break; |
1238 | ||
1239 | case 'i': /* Immediate value or expression expected. */ | |
1240 | /* Advance the original format pointer. */ | |
1241 | (*op_con)++; | |
1242 | op_constraint++; | |
1243 | if (ISDIGIT (*op_constraint)) | |
3879925e SK |
1244 | { |
1245 | *bit_width = (int) *op_constraint - '0'; | |
1246 | } | |
f6c1a2d5 | 1247 | else if (*op_constraint == 'a') |
3879925e SK |
1248 | { |
1249 | *bit_width = 0x0A; | |
1250 | } | |
f6c1a2d5 | 1251 | else if (*op_constraint == 'f') |
3879925e SK |
1252 | { |
1253 | *bit_width = 0x0F; | |
1254 | } | |
f6c1a2d5 | 1255 | /* http://tigcc.ticalc.org/doc/gnuasm.html#SEC31 */ |
3879925e SK |
1256 | if (operand_two.exp.X_op == O_constant) |
1257 | { | |
1258 | op_mask = operand_two.exp.X_add_number; | |
1259 | if ((opcode->name[strlen (opcode->name) - 1] == 'l') && macroClipping) | |
1260 | { | |
1261 | op_mask &= 0x00FF; | |
1262 | } | |
1263 | else if ((opcode->name[strlen (opcode->name) - 1]) == 'h' | |
1264 | && macroClipping) | |
1265 | { | |
1266 | op_mask >>= 8; | |
1267 | } | |
1268 | ||
1269 | /* Make sure it fits. */ | |
1270 | for (i = *bit_width; i; i--) | |
1271 | { | |
1272 | max_size <<= 1; | |
1273 | max_size += 1; | |
1274 | } | |
1275 | if (op_mask > max_size) | |
1276 | as_bad (_(":operand value(%d) too big for constraint"), op_mask); | |
1277 | } | |
f6c1a2d5 | 1278 | else |
3879925e SK |
1279 | { |
1280 | fixup_required = 1; | |
1281 | if (*op_constraint == '8') | |
1282 | { | |
1283 | if ((opcode->name[strlen (opcode->name) - 1] == 'l') | |
1284 | && macroClipping) | |
1285 | { | |
1286 | fixp = fix_new_exp (frag_now, where, 2, &operand_two.exp, FALSE, | |
1287 | BFD_RELOC_XGATE_24); | |
1288 | /* Should be BFD_RELOC_XGATE_IMM8_LO TODO fix. */ | |
1289 | fixp->fx_pcrel_adjust = 0; | |
1290 | } | |
1291 | if ((opcode->name[strlen (opcode->name) - 1]) == 'h' | |
1292 | && macroClipping) | |
1293 | { | |
1294 | fixp = fix_new_exp (frag_now, where, 2, &operand_two.exp, FALSE, | |
1295 | BFD_RELOC_XGATE_IMM8_HI); | |
1296 | fixp->fx_pcrel_adjust = 0; | |
1297 | } | |
1298 | if (!fixp) | |
f6c1a2d5 | 1299 | as_bad (_(":unknown relocation")); |
3879925e SK |
1300 | } |
1301 | else if (*op_constraint == '5') | |
1302 | { | |
1303 | fixp = fix_new_exp (frag_now, where, 2, &operand_two.exp, FALSE, | |
1304 | BFD_RELOC_XGATE_IMM5); | |
1305 | fixp->fx_pcrel_adjust = 0; | |
1306 | } | |
1307 | else if (*op_constraint == '4') | |
1308 | { | |
1309 | fixp = fix_new_exp (frag_now, where, 2, &operand_two.exp, FALSE, | |
1310 | BFD_RELOC_XGATE_IMM4); | |
1311 | fixp->fx_pcrel_adjust = 0; | |
1312 | } | |
1313 | else if (*op_constraint == '3') | |
1314 | { | |
1315 | fixp = fix_new_exp (frag_now, where, 2, &operand_two.exp, FALSE, | |
f6c1a2d5 NC |
1316 | BFD_RELOC_XGATE_IMM3); |
1317 | fixp->fx_pcrel_adjust = 0; | |
1318 | } | |
1319 | else | |
1320 | { | |
1321 | as_bad (_(":unknown relocation constraint size")); | |
1322 | } | |
1323 | } | |
1324 | break; | |
1325 | ||
1326 | case 'c': /* CCR register expected. */ | |
3879925e SK |
1327 | *bit_width = 0; |
1328 | if (operand_two.reg != REG_CCR) | |
1329 | as_bad (_(": expected register name ccr ")); | |
f6c1a2d5 NC |
1330 | break; |
1331 | ||
1332 | case 'p': /* PC register expected. */ | |
3879925e SK |
1333 | *bit_width = 0; |
1334 | if (operand_two.reg != REG_PC) | |
1335 | as_bad (_(": expected register name pc ")); | |
f6c1a2d5 NC |
1336 | break; |
1337 | ||
1338 | case 'b': /* Branch expected. */ | |
f6c1a2d5 NC |
1339 | (*op_con)++; |
1340 | op_constraint++; | |
f6c1a2d5 | 1341 | |
3879925e | 1342 | if (operand_two.exp.X_op != O_register) |
f6c1a2d5 | 1343 | { |
3879925e | 1344 | if (*op_constraint == '9') |
f6c1a2d5 | 1345 | { |
3879925e SK |
1346 | fixp = fix_new_exp (frag_now, where, 2, &operand_two.exp, TRUE, |
1347 | R_XGATE_PCREL_9); | |
1348 | fixp->fx_pcrel_adjust = 1; | |
f6c1a2d5 | 1349 | } |
3879925e | 1350 | else if (*op_constraint == 'a') |
f6c1a2d5 | 1351 | { |
3879925e SK |
1352 | fixp = fix_new_exp (frag_now, where, 2, &operand_two.exp, TRUE, |
1353 | R_XGATE_PCREL_10); | |
1354 | fixp->fx_pcrel_adjust = 1; | |
f6c1a2d5 NC |
1355 | } |
1356 | } | |
3879925e | 1357 | else |
f6c1a2d5 | 1358 | { |
3879925e | 1359 | as_fatal (_("Operand `%x' not recognized in fixup8."), operand_two.exp.X_op); |
f6c1a2d5 | 1360 | } |
3879925e SK |
1361 | break; |
1362 | case '?': | |
1363 | break; | |
fe540416 | 1364 | |
3879925e SK |
1365 | default: |
1366 | as_bad (_("unknown constraint `%c'"), *op_constraint); | |
1367 | break; | |
1368 | } | |
1369 | return op_mask; | |
fe540416 | 1370 | } |