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1 /* tc-tic54x.c -- Assembly code for the Texas Instruments TMS320C54X
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4 Contributed by Timothy Wall (twall@cygnus.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 2, 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 the Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
21 02110-1301, USA. */
22
23 /* Texas Instruments TMS320C54X machine specific gas.
24 Written by Timothy Wall (twall@alum.mit.edu).
25
26 Valuable things to do:
27 Pipeline conflict warnings
28 We encode/decode "ld #_label, dp" differently in relocatable files
29 This means we're not compatible with TI output containing those
30 expressions. We store the upper nine bits; TI stores the lower nine
31 bits. How they recover the original upper nine bits is beyond me.
32
33 Tests to add to expect testsuite:
34 '=' and '==' with .if, .elseif, and .break
35
36 Incompatibilities (mostly trivial):
37 We don't allow '''
38 We fill text section with zeroes instead of "nop"s
39 We don't convert '' or "" to a single instance
40 We don't convert '' to '\0'
41 We don't allow strings with .byte/.half/.short/.long
42 Probably details of the subsym stuff are different
43 TI sets labels to be data type 4 (T_INT); GAS uses T_NULL.
44
45 COFF1 limits section names to 8 characters.
46 Some of the default behavior changed from COFF1 to COFF2. */
47
48 #include <stdlib.h>
49 #include <limits.h>
50 #include <errno.h>
51 #include "as.h"
52 #include "safe-ctype.h"
53 #include "sb.h"
54 #include "macro.h"
55 #include "subsegs.h"
56 #include "struc-symbol.h"
57 #include "opcode/tic54x.h"
58 #include "obj-coff.h"
59 #include <math.h>
60
61
62 static struct stag
63 {
64 symbolS *sym; /* Symbol for this stag; value is offset. */
65 const char *name; /* Shortcut to symbol name. */
66 bfd_vma size; /* Size of struct/union. */
67 int current_bitfield_offset; /* Temporary for tracking fields. */
68 int is_union;
69 struct stag_field /* List of fields. */
70 {
71 const char *name;
72 bfd_vma offset; /* Of start of this field. */
73 int bitfield_offset; /* Of start of this field. */
74 struct stag *stag; /* If field is struct/union. */
75 struct stag_field *next;
76 } *field;
77 /* For nesting; used only in stag construction. */
78 struct stag *inner; /* Enclosed .struct. */
79 struct stag *outer; /* Enclosing .struct. */
80 } *current_stag = NULL;
81
82 #define MAX_LINE 256 /* Lines longer than this are truncated by TI's asm. */
83
84 typedef struct _tic54x_insn
85 {
86 const template *tm; /* Opcode template. */
87
88 char mnemonic[MAX_LINE]; /* Opcode name/mnemonic. */
89 char parmnemonic[MAX_LINE]; /* 2nd mnemonic of parallel insn. */
90
91 int opcount;
92 struct opstruct
93 {
94 char buf[MAX_LINE];
95 enum optype type;
96 expressionS exp;
97 } operands[MAX_OPERANDS];
98
99 int paropcount;
100 struct opstruct paroperands[MAX_OPERANDS];
101
102 int is_lkaddr;
103 int lkoperand;
104 int words; /* Size of insn in 16-bit words. */
105 int using_default_dst; /* Do we need to explicitly set an
106 omitted OP_DST operand? */
107 struct
108 {
109 unsigned short word; /* Final encoded opcode data. */
110 int unresolved;
111 int r_nchars; /* Relocation size. */
112 bfd_reloc_code_real_type r_type; /* Relocation type. */
113 expressionS addr_expr; /* Storage for unresolved expressions. */
114 } opcode[3];
115 } tic54x_insn;
116
117 enum cpu_version
118 {
119 VNONE = 0, V541 = 1, V542 = 2, V543 = 3, V545 = 5, V548 = 8, V549 = 9,
120 V545LP = 15, V546LP = 16
121 };
122
123 enum address_mode
124 {
125 c_mode, /* 16-bit addresses. */
126 far_mode /* >16-bit addresses. */
127 };
128
129 static segT stag_saved_seg;
130 static subsegT stag_saved_subseg;
131
132 const char comment_chars[] = ";";
133 const char line_comment_chars[] = ";*#"; /* At column zero only. */
134 const char line_separator_chars[] = ""; /* Not permitted. */
135
136 int emitting_long = 0;
137
138 /* Characters which indicate that this is a floating point constant. */
139 const char FLT_CHARS[] = "fF";
140
141 /* Characters that can be used to separate mantissa from exp in FP
142 nums. */
143 const char EXP_CHARS[] = "eE";
144
145 const char *md_shortopts = "";
146
147 #define OPTION_ADDRESS_MODE (OPTION_MD_BASE)
148 #define OPTION_CPU_VERSION (OPTION_ADDRESS_MODE + 1)
149 #define OPTION_COFF_VERSION (OPTION_CPU_VERSION + 1)
150 #define OPTION_STDERR_TO_FILE (OPTION_COFF_VERSION + 1)
151
152 struct option md_longopts[] =
153 {
154 { "mfar-mode", no_argument, NULL, OPTION_ADDRESS_MODE },
155 { "mf", no_argument, NULL, OPTION_ADDRESS_MODE },
156 { "mcpu", required_argument, NULL, OPTION_CPU_VERSION },
157 { "merrors-to-file", required_argument, NULL, OPTION_STDERR_TO_FILE },
158 { "me", required_argument, NULL, OPTION_STDERR_TO_FILE },
159 { NULL, no_argument, NULL, 0},
160 };
161
162 size_t md_longopts_size = sizeof (md_longopts);
163
164 static int assembly_begun = 0;
165 /* Addressing mode is not entirely implemented; the latest rev of the Other
166 assembler doesn't seem to make any distinction whatsoever; all relocations
167 are stored as extended relocatiosn. Older versions used REL16 vs RELEXT16,
168 but now it seems all relocations are RELEXT16. We use all RELEXT16.
169
170 The cpu version is kind of a waste of time as well. There is one
171 instruction (RND) for LP devices only, and several for devices with
172 extended addressing only. We include it for compatibility. */
173 static enum address_mode amode = c_mode;
174 static enum cpu_version cpu = VNONE;
175
176 /* Include string substitutions in listing? */
177 static int listing_sslist = 0;
178
179 /* Did we do subsym substitutions on the line? */
180 static int substitution_line = 0;
181
182 /* Last label seen. */
183 static symbolS *last_label_seen = NULL;
184
185 /* This ensures that all new labels are unique. */
186 static int local_label_id;
187
188 static struct hash_control *subsym_recurse_hash; /* Prevent infinite recurse. */
189 static struct hash_control *math_hash; /* Built-in math functions. */
190 /* Allow maximum levels of macro nesting; level 0 is the main substitution
191 symbol table. The other assembler only does 32 levels, so there! */
192 static struct hash_control *subsym_hash[100];
193
194 /* Keep track of local labels so we can substitute them before GAS sees them
195 since macros use their own 'namespace' for local labels, use a separate hash
196
197 We do our own local label handling 'cuz it's subtly different from the
198 stock GAS handling.
199
200 We use our own macro nesting counter, since GAS overloads it when expanding
201 other things (like conditionals and repeat loops). */
202 static int macro_level = 0;
203 static struct hash_control *local_label_hash[100];
204 /* Keep track of struct/union tags. */
205 static struct hash_control *stag_hash;
206 static struct hash_control *op_hash;
207 static struct hash_control *parop_hash;
208 static struct hash_control *reg_hash;
209 static struct hash_control *mmreg_hash;
210 static struct hash_control *cc_hash;
211 static struct hash_control *cc2_hash;
212 static struct hash_control *cc3_hash;
213 static struct hash_control *sbit_hash;
214 static struct hash_control *misc_symbol_hash;
215
216 /* Only word (et al.), align, or conditionals are allowed within
217 .struct/.union. */
218 #define ILLEGAL_WITHIN_STRUCT() \
219 do \
220 if (current_stag != NULL) \
221 { \
222 as_bad (_("pseudo-op illegal within .struct/.union")); \
223 return; \
224 } \
225 while (0)
226
227 static void tic54x_emit_char PARAMS ((char));
228 static fragS * frag_prev PARAMS ((fragS *, segT));
229 static fragS * bit_offset_frag PARAMS ((fragS *, segT));
230 static int frag_bit_offset PARAMS ((fragS *, segT));
231 static char * parse_expression PARAMS ((char *, expressionS *));
232 static void tic54x_asg PARAMS ((int));
233 static void tic54x_eval PARAMS ((int));
234 static void tic54x_bss PARAMS ((int));
235 static void stag_add_field_symbols PARAMS ((struct stag *, const char *, bfd_vma, symbolS *, const char *));
236 static void stag_add_field PARAMS ((struct stag *, const char *, bfd_vma, struct stag *));
237 static void tic54x_struct PARAMS ((int));
238 static void tic54x_endstruct PARAMS ((int));
239 static void tic54x_tag PARAMS ((int));
240 static void tic54x_struct_field PARAMS ((int));
241 static void tic54x_cons PARAMS ((int));
242 static void tic54x_remove_local_label PARAMS ((const char *, PTR));
243 static void tic54x_clear_local_labels PARAMS ((int));
244 static void tic54x_sect PARAMS ((int));
245 static void tic54x_space PARAMS ((int));
246 static void tic54x_usect PARAMS ((int));
247 static enum cpu_version lookup_version PARAMS ((const char *));
248 static void set_cpu PARAMS ((enum cpu_version));
249 static void tic54x_version PARAMS ((int));
250 static void tic54x_float_cons PARAMS ((int));
251 static void tic54x_stringer PARAMS ((int));
252 static void tic54x_p2align PARAMS ((int));
253 static void tic54x_align_words PARAMS ((int));
254 static void tic54x_field PARAMS ((int));
255 static int tic54x_initialized_section PARAMS ((segT));
256 static void tic54x_clink PARAMS ((int));
257 static void tic54x_set_default_include PARAMS ((int));
258 static void tic54x_include PARAMS ((int));
259 static void tic54x_message PARAMS ((int));
260 static void tic54x_label PARAMS ((int));
261 static void tic54x_mmregs PARAMS ((int));
262 static void tic54x_loop PARAMS ((int));
263 static void tic54x_endloop PARAMS ((int));
264 static void tic54x_break PARAMS ((int));
265 static void set_address_mode PARAMS ((int));
266 static void tic54x_address_mode PARAMS ((int));
267 static void tic54x_sblock PARAMS ((int));
268 static void tic54x_set PARAMS ((int));
269 static void tic54x_fclist PARAMS ((int));
270 static void tic54x_sslist PARAMS ((int));
271 static void tic54x_var PARAMS ((int));
272 static void tic54x_mlib PARAMS ((int));
273 static int subsym_symlen PARAMS ((char *, char *));
274 static int subsym_symcmp PARAMS ((char *, char *));
275 static int subsym_firstch PARAMS ((char *, char *));
276 static int subsym_lastch PARAMS ((char *, char *));
277 static int subsym_isdefed PARAMS ((char *, char *));
278 static int subsym_ismember PARAMS ((char *, char *));
279 static int subsym_iscons PARAMS ((char *, char *));
280 static int subsym_isname PARAMS ((char *, char *));
281 static int subsym_isreg PARAMS ((char *, char *));
282 static int subsym_structsz PARAMS ((char *, char *));
283 static int subsym_structacc PARAMS ((char *, char *));
284 static float math_ceil PARAMS ((float, float));
285 static float math_cvi PARAMS ((float, float));
286 static float math_floor PARAMS ((float, float));
287 static float math_fmod PARAMS ((float, float));
288 static float math_int PARAMS ((float, float));
289 static float math_round PARAMS ((float, float));
290 static float math_sgn PARAMS ((float, float));
291 static float math_trunc PARAMS ((float, float));
292 static float math_acos PARAMS ((float, float));
293 static float math_asin PARAMS ((float, float));
294 static float math_atan PARAMS ((float, float));
295 static float math_atan2 PARAMS ((float, float));
296 static float math_cosh PARAMS ((float, float));
297 static float math_cos PARAMS ((float, float));
298 static float math_cvf PARAMS ((float, float));
299 static float math_exp PARAMS ((float, float));
300 static float math_fabs PARAMS ((float, float));
301 static float math_ldexp PARAMS ((float, float));
302 static float math_log10 PARAMS ((float, float));
303 static float math_log PARAMS ((float, float));
304 static float math_max PARAMS ((float, float));
305 static float math_min PARAMS ((float, float));
306 static float math_pow PARAMS ((float, float));
307 static float math_sin PARAMS ((float, float));
308 static float math_sinh PARAMS ((float, float));
309 static float math_sqrt PARAMS ((float, float));
310 static float math_tan PARAMS ((float, float));
311 static float math_tanh PARAMS ((float, float));
312 static int is_accumulator PARAMS ((struct opstruct *));
313 static int get_operands PARAMS ((struct opstruct operands[], char *));
314 static int is_immediate PARAMS ((struct opstruct *));
315 static int is_absolute PARAMS ((struct opstruct *));
316 static int is_indirect PARAMS ((struct opstruct *));
317 static int is_dual PARAMS ((struct opstruct *));
318 static int is_mmreg PARAMS ((struct opstruct *));
319 static int is_type PARAMS ((struct opstruct *, enum optype));
320 static int operands_match PARAMS ((tic54x_insn *, struct opstruct *, int, const enum optype *, int, int));
321 static int encode_dmad PARAMS ((tic54x_insn *, struct opstruct *, int));
322 static int encode_address PARAMS ((tic54x_insn *, struct opstruct *));
323 static int encode_indirect PARAMS ((tic54x_insn *, struct opstruct *));
324 static int encode_integer PARAMS ((tic54x_insn *, struct opstruct *, int, int, int, unsigned short));
325 static int encode_condition PARAMS ((tic54x_insn *, struct opstruct *));
326 static int encode_cc3 PARAMS ((tic54x_insn *, struct opstruct *));
327 static int encode_arx PARAMS ((tic54x_insn *, struct opstruct *));
328 static int encode_cc2 PARAMS ((tic54x_insn *, struct opstruct *));
329 static int encode_operand PARAMS ((tic54x_insn *, enum optype, struct opstruct *));
330 static void emit_insn PARAMS ((tic54x_insn *));
331 static int build_insn PARAMS ((tic54x_insn *));
332 static int optimize_insn PARAMS ((tic54x_insn *));
333 static int tic54x_parse_insn PARAMS ((tic54x_insn *, char *));
334 static int next_line_shows_parallel PARAMS ((char *));
335 static int tic54x_parse_parallel_insn_firstline PARAMS ((tic54x_insn *, char *));
336 static int tic54x_parse_parallel_insn_lastline PARAMS ((tic54x_insn *, char *));
337 static char * subsym_get_arg PARAMS ((char *, char *, char **, int));
338 static void subsym_create_or_replace PARAMS ((char *, char *));
339 static char * subsym_lookup PARAMS ((char *, int));
340 static char * subsym_substitute PARAMS ((char *, int));
341
342
343 void
344 md_show_usage (stream)
345 FILE *stream;
346 {
347 fprintf (stream, _("C54x-specific command line options:\n"));
348 fprintf (stream, _("-mfar-mode | -mf Use extended addressing\n"));
349 fprintf (stream, _("-mcpu=<CPU version> Specify the CPU version\n"));
350 fprintf (stream, _("-merrors-to-file <filename>\n"));
351 fprintf (stream, _("-me <filename> Redirect errors to a file\n"));
352 }
353
354 /* Output a single character (upper octect is zero). */
355
356 static void
357 tic54x_emit_char (c)
358 char c;
359 {
360 expressionS exp;
361
362 exp.X_op = O_constant;
363 exp.X_add_number = c;
364 emit_expr (&exp, 2);
365 }
366
367 /* Walk backwards in the frag chain. */
368
369 static fragS *
370 frag_prev (frag, seg)
371 fragS *frag;
372 segT seg;
373 {
374 segment_info_type *seginfo = seg_info (seg);
375 fragS *fragp;
376
377 for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next)
378 if (fragp->fr_next == frag)
379 return fragp;
380
381 return NULL;
382 }
383
384 static fragS *
385 bit_offset_frag (frag, seg)
386 fragS *frag;
387 segT seg;
388 {
389 while (frag != NULL)
390 {
391 if (frag->fr_fix == 0
392 && frag->fr_opcode == NULL
393 && frag->tc_frag_data == 0)
394 frag = frag_prev (frag, seg);
395 else
396 return frag;
397 }
398 return NULL;
399 }
400
401 /* Return the number of bits allocated in the most recent word, or zero if
402 none. .field/.space/.bes may leave words partially allocated. */
403
404 static int
405 frag_bit_offset (frag, seg)
406 fragS *frag;
407 segT seg;
408 {
409 frag = bit_offset_frag (frag, seg);
410
411 if (frag)
412 return frag->fr_opcode != NULL ? -1 : frag->tc_frag_data;
413
414 return 0;
415 }
416
417 /* Read an expression from a C string; returns a pointer past the end of the
418 expression. */
419
420 static char *
421 parse_expression (str, exp)
422 char *str;
423 expressionS * exp;
424 {
425 char *s;
426 char *tmp;
427
428 tmp = input_line_pointer; /* Save line pointer. */
429 input_line_pointer = str;
430 expression (exp);
431 s = input_line_pointer;
432 input_line_pointer = tmp; /* Restore line pointer. */
433 return s; /* Return pointer to where parsing stopped. */
434 }
435
436 /* .asg "character-string"|character-string, symbol
437
438 .eval is the only pseudo-op allowed to perform arithmetic on substitution
439 symbols. all other use of symbols defined with .asg are currently
440 unsupported. */
441
442 static void
443 tic54x_asg (x)
444 int x ATTRIBUTE_UNUSED;
445 {
446 int c;
447 char *name;
448 char *str;
449 char *tmp;
450 int quoted = *input_line_pointer == '"';
451
452 ILLEGAL_WITHIN_STRUCT ();
453
454 if (quoted)
455 {
456 int len;
457 str = demand_copy_C_string (&len);
458 c = *input_line_pointer;
459 }
460 else
461 {
462 str = input_line_pointer;
463 while ((c = *input_line_pointer) != ',')
464 {
465 if (is_end_of_line[(int) *input_line_pointer])
466 break;
467 ++input_line_pointer;
468 }
469 *input_line_pointer = 0;
470 }
471 if (c != ',')
472 {
473 as_bad (_("Comma and symbol expected for '.asg STRING, SYMBOL'"));
474 ignore_rest_of_line ();
475 return;
476 }
477
478 name = ++input_line_pointer;
479 c = get_symbol_end (); /* Get terminator. */
480 if (!ISALPHA (*name))
481 {
482 as_bad ("symbols assigned with .asg must begin with a letter");
483 ignore_rest_of_line ();
484 return;
485 }
486
487 tmp = xmalloc (strlen (str) + 1);
488 strcpy (tmp, str);
489 str = tmp;
490 tmp = xmalloc (strlen (name) + 1);
491 strcpy (tmp, name);
492 name = tmp;
493 subsym_create_or_replace (name, str);
494 *input_line_pointer = c;
495 demand_empty_rest_of_line ();
496 }
497
498 /* .eval expression, symbol
499 There's something screwy about this. The other assembler sometimes does and
500 sometimes doesn't substitute symbols defined with .eval.
501 We'll put the symbols into the subsym table as well as the normal symbol
502 table, since that's what works best. */
503
504 static void
505 tic54x_eval (x)
506 int x ATTRIBUTE_UNUSED;
507 {
508 char c;
509 int value;
510 char *name;
511 symbolS *symbolP;
512 char valuestr[32], *tmp;
513 int quoted;
514
515 ILLEGAL_WITHIN_STRUCT ();
516
517 SKIP_WHITESPACE ();
518
519 quoted = *input_line_pointer == '"';
520 if (quoted)
521 ++input_line_pointer;
522 value = get_absolute_expression ();
523 if (quoted)
524 {
525 if (*input_line_pointer != '"')
526 {
527 as_bad (_("Unterminated string after absolute expression"));
528 ignore_rest_of_line ();
529 return;
530 }
531 ++input_line_pointer;
532 }
533 if (*input_line_pointer++ != ',')
534 {
535 as_bad (_("Comma and symbol expected for '.eval EXPR, SYMBOL'"));
536 ignore_rest_of_line ();
537 return;
538 }
539 name = input_line_pointer;
540 c = get_symbol_end (); /* Get terminator. */
541 tmp = xmalloc (strlen (name) + 1);
542 name = strcpy (tmp, name);
543 *input_line_pointer = c;
544
545 if (!ISALPHA (*name))
546 {
547 as_bad (_("symbols assigned with .eval must begin with a letter"));
548 ignore_rest_of_line ();
549 return;
550 }
551 symbolP = symbol_new (name, absolute_section,
552 (valueT) value, &zero_address_frag);
553 SF_SET_LOCAL (symbolP);
554 symbol_table_insert (symbolP);
555
556 /* The "other" assembler sometimes doesn't put .eval's in the subsym table
557 But since there's not written rule as to when, don't even bother trying
558 to match their behavior. */
559 sprintf (valuestr, "%d", value);
560 tmp = xmalloc (strlen (valuestr) + 1);
561 strcpy (tmp, valuestr);
562 subsym_create_or_replace (name, tmp);
563
564 demand_empty_rest_of_line ();
565 }
566
567 /* .bss symbol, size [, [blocking flag] [, alignment flag]
568
569 alignment is to a longword boundary; blocking is to 128-word boundary.
570
571 1) if there is a hole in memory, this directive should attempt to fill it
572 (not yet implemented).
573
574 2) if the blocking flag is not set, allocate at the current SPC
575 otherwise, check to see if the current SPC plus the space to be
576 allocated crosses the page boundary (128 words).
577 if there's not enough space, create a hole and align with the next page
578 boundary.
579 (not yet implemented). */
580
581 static void
582 tic54x_bss (x)
583 int x ATTRIBUTE_UNUSED;
584 {
585 char c;
586 char *name;
587 char *p;
588 int words;
589 segT current_seg;
590 subsegT current_subseg;
591 symbolS *symbolP;
592 int block = 0;
593 int align = 0;
594
595 ILLEGAL_WITHIN_STRUCT ();
596
597 current_seg = now_seg; /* Save current seg. */
598 current_subseg = now_subseg; /* Save current subseg. */
599
600 name = input_line_pointer;
601 c = get_symbol_end (); /* Get terminator. */
602 if (c != ',')
603 {
604 as_bad (".bss size argument missing\n");
605 ignore_rest_of_line ();
606 return;
607 }
608
609 ++input_line_pointer;
610 words = get_absolute_expression ();
611 if (words < 0)
612 {
613 as_bad (".bss size %d < 0!", words);
614 ignore_rest_of_line ();
615 return;
616 }
617
618 if (*input_line_pointer == ',')
619 {
620 /* The blocking flag may be missing. */
621 ++input_line_pointer;
622 if (*input_line_pointer != ',')
623 block = get_absolute_expression ();
624 else
625 block = 0;
626
627 if (*input_line_pointer == ',')
628 {
629 ++input_line_pointer;
630 align = get_absolute_expression ();
631 }
632 else
633 align = 0;
634 }
635 else
636 block = align = 0;
637
638 subseg_set (bss_section, 0);
639 symbolP = symbol_find_or_make (name);
640
641 if (S_GET_SEGMENT (symbolP) == bss_section)
642 symbolP->sy_frag->fr_symbol = (symbolS *) NULL;
643
644 symbol_set_frag (symbolP, frag_now);
645 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP,
646 (offsetT) (words * OCTETS_PER_BYTE), (char *) 0);
647 *p = 0; /* Fill char. */
648
649 S_SET_SEGMENT (symbolP, bss_section);
650
651 /* The symbol may already have been created with a preceding
652 ".globl" directive -- be careful not to step on storage class
653 in that case. Otherwise, set it to static. */
654 if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
655 S_SET_STORAGE_CLASS (symbolP, C_STAT);
656
657 if (align)
658 {
659 /* s_align eats end of line; restore it */
660 s_align_bytes (4);
661 --input_line_pointer;
662 }
663
664 if (block)
665 bss_section->flags |= SEC_TIC54X_BLOCK;
666
667 subseg_set (current_seg, current_subseg); /* Restore current seg. */
668 demand_empty_rest_of_line ();
669 }
670
671 static void
672 stag_add_field_symbols (stag, path, base_offset, rootsym, root_stag_name)
673 struct stag *stag;
674 const char *path;
675 bfd_vma base_offset;
676 symbolS *rootsym;
677 const char *root_stag_name;
678 {
679 char prefix[strlen (path) + 2];
680 struct stag_field *field = stag->field;
681
682 /* Construct a symbol for every field contained within this structure
683 including fields within structure fields. */
684 strcpy (prefix, path);
685 if (*path)
686 strcat (prefix, ".");
687
688 while (field != NULL)
689 {
690 int len = strlen (prefix) + strlen (field->name) + 2;
691 char *name = xmalloc (len);
692 strcpy (name, prefix);
693 strcat (name, field->name);
694
695 if (rootsym == NULL)
696 {
697 symbolS *sym;
698 sym = symbol_new (name, absolute_section,
699 (field->stag ? field->offset :
700 (valueT) (base_offset + field->offset)),
701 &zero_address_frag);
702 SF_SET_LOCAL (sym);
703 symbol_table_insert (sym);
704 }
705 else
706 {
707 char *replacement = xmalloc (strlen (name)
708 + strlen (stag->name) + 2);
709 strcpy (replacement, S_GET_NAME (rootsym));
710 strcat (replacement, "+");
711 strcat (replacement, root_stag_name);
712 strcat (replacement, name + strlen (S_GET_NAME (rootsym)));
713 hash_insert (subsym_hash[0], name, replacement);
714 }
715
716 /* Recurse if the field is a structure.
717 Note the field offset is relative to the outermost struct. */
718 if (field->stag != NULL)
719 stag_add_field_symbols (field->stag, name,
720 field->offset,
721 rootsym, root_stag_name);
722 field = field->next;
723 }
724 }
725
726 /* Keep track of stag fields so that when structures are nested we can add the
727 complete dereferencing symbols to the symbol table. */
728
729 static void
730 stag_add_field (parent, name, offset, stag)
731 struct stag *parent;
732 const char *name;
733 bfd_vma offset;
734 struct stag *stag;
735 {
736 struct stag_field *sfield = xmalloc (sizeof (struct stag_field));
737
738 memset (sfield, 0, sizeof (*sfield));
739 sfield->name = strcpy (xmalloc (strlen (name) + 1), name);
740 sfield->offset = offset;
741 sfield->bitfield_offset = parent->current_bitfield_offset;
742 sfield->stag = stag;
743 if (parent->field == NULL)
744 parent->field = sfield;
745 else
746 {
747 struct stag_field *sf = parent->field;
748 while (sf->next != NULL)
749 sf = sf->next;
750 sf->next = sfield;
751 }
752 /* Only create a symbol for this field if the parent has no name. */
753 if (!strncmp (".fake", parent->name, 5))
754 {
755 symbolS *sym = symbol_new (name, absolute_section,
756 (valueT) offset, &zero_address_frag);
757 SF_SET_LOCAL (sym);
758 symbol_table_insert (sym);
759 }
760 }
761
762 /* [STAG] .struct [OFFSET]
763 Start defining structure offsets (symbols in absolute section). */
764
765 static void
766 tic54x_struct (arg)
767 int arg;
768 {
769 int start_offset = 0;
770 int is_union = arg;
771
772 if (!current_stag)
773 {
774 /* Starting a new struct, switch to absolute section. */
775 stag_saved_seg = now_seg;
776 stag_saved_subseg = now_subseg;
777 subseg_set (absolute_section, 0);
778 }
779 /* Align the current pointer. */
780 else if (current_stag->current_bitfield_offset != 0)
781 {
782 ++abs_section_offset;
783 current_stag->current_bitfield_offset = 0;
784 }
785
786 /* Offset expression is only meaningful for global .structs. */
787 if (!is_union)
788 {
789 /* Offset is ignored in inner structs. */
790 SKIP_WHITESPACE ();
791 if (!is_end_of_line[(int) *input_line_pointer])
792 start_offset = get_absolute_expression ();
793 else
794 start_offset = 0;
795 }
796
797 if (current_stag)
798 {
799 /* Nesting, link to outer one. */
800 current_stag->inner = (struct stag *) xmalloc (sizeof (struct stag));
801 memset (current_stag->inner, 0, sizeof (struct stag));
802 current_stag->inner->outer = current_stag;
803 current_stag = current_stag->inner;
804 if (start_offset)
805 as_warn (_("Offset on nested structures is ignored"));
806 start_offset = abs_section_offset;
807 }
808 else
809 {
810 current_stag = (struct stag *) xmalloc (sizeof (struct stag));
811 memset (current_stag, 0, sizeof (struct stag));
812 abs_section_offset = start_offset;
813 }
814 current_stag->is_union = is_union;
815
816 if (line_label == NULL)
817 {
818 static int struct_count = 0;
819 char fake[] = ".fake_stagNNNNNNN";
820 sprintf (fake, ".fake_stag%d", struct_count++);
821 current_stag->sym = symbol_new (fake, absolute_section,
822 (valueT) abs_section_offset,
823 &zero_address_frag);
824 }
825 else
826 {
827 char label[strlen (S_GET_NAME (line_label)) + 1];
828 strcpy (label, S_GET_NAME (line_label));
829 current_stag->sym = symbol_new (label, absolute_section,
830 (valueT) abs_section_offset,
831 &zero_address_frag);
832 }
833 current_stag->name = S_GET_NAME (current_stag->sym);
834 SF_SET_LOCAL (current_stag->sym);
835 /* Nested .structs don't go into the symbol table. */
836 if (current_stag->outer == NULL)
837 symbol_table_insert (current_stag->sym);
838
839 line_label = NULL;
840 }
841
842 /* [LABEL] .endstruct
843 finish defining structure offsets; optional LABEL's value will be the size
844 of the structure. */
845
846 static void
847 tic54x_endstruct (is_union)
848 int is_union;
849 {
850 int size;
851 const char *path =
852 !strncmp (current_stag->name, ".fake", 5) ? "" : current_stag->name;
853
854 if (!current_stag || current_stag->is_union != is_union)
855 {
856 as_bad (_(".end%s without preceding .%s"),
857 is_union ? "union" : "struct",
858 is_union ? "union" : "struct");
859 ignore_rest_of_line ();
860 return;
861 }
862
863 /* Align end of structures. */
864 if (current_stag->current_bitfield_offset)
865 {
866 ++abs_section_offset;
867 current_stag->current_bitfield_offset = 0;
868 }
869
870 if (current_stag->is_union)
871 size = current_stag->size;
872 else
873 size = abs_section_offset - S_GET_VALUE (current_stag->sym);
874 if (line_label != NULL)
875 {
876 S_SET_VALUE (line_label, size);
877 symbol_table_insert (line_label);
878 line_label = NULL;
879 }
880
881 /* Union size has already been calculated. */
882 if (!current_stag->is_union)
883 current_stag->size = size;
884 /* Nested .structs don't get put in the stag table. */
885 if (current_stag->outer == NULL)
886 {
887 hash_insert (stag_hash, current_stag->name, current_stag);
888 stag_add_field_symbols (current_stag, path,
889 S_GET_VALUE (current_stag->sym),
890 NULL, NULL);
891 }
892 current_stag = current_stag->outer;
893
894 /* If this is a nested .struct/.union, add it as a field to the enclosing
895 one. otherwise, restore the section we were in. */
896 if (current_stag != NULL)
897 {
898 stag_add_field (current_stag, current_stag->inner->name,
899 S_GET_VALUE (current_stag->inner->sym),
900 current_stag->inner);
901 }
902 else
903 subseg_set (stag_saved_seg, stag_saved_subseg);
904 }
905
906 /* [LABEL] .tag STAG
907 Reference a structure within a structure, as a sized field with an optional
908 label.
909 If used outside of a .struct/.endstruct, overlays the given structure
910 format on the existing allocated space. */
911
912 static void
913 tic54x_tag (ignore)
914 int ignore ATTRIBUTE_UNUSED;
915 {
916 char *name = input_line_pointer;
917 int c = get_symbol_end ();
918 struct stag *stag = (struct stag *) hash_find (stag_hash, name);
919
920 if (!stag)
921 {
922 if (*name)
923 as_bad (_("Unrecognized struct/union tag '%s'"), name);
924 else
925 as_bad (_(".tag requires a structure tag"));
926 ignore_rest_of_line ();
927 return;
928 }
929 if (line_label == NULL)
930 {
931 as_bad (_("Label required for .tag"));
932 ignore_rest_of_line ();
933 return;
934 }
935 else
936 {
937 char label[strlen (S_GET_NAME (line_label)) + 1];
938
939 strcpy (label, S_GET_NAME (line_label));
940 if (current_stag != NULL)
941 stag_add_field (current_stag, label,
942 abs_section_offset - S_GET_VALUE (current_stag->sym),
943 stag);
944 else
945 {
946 symbolS *sym = symbol_find (label);
947
948 if (!sym)
949 {
950 as_bad (_(".tag target '%s' undefined"), label);
951 ignore_rest_of_line ();
952 return;
953 }
954 stag_add_field_symbols (stag, S_GET_NAME (sym),
955 S_GET_VALUE (stag->sym), sym, stag->name);
956 }
957 }
958
959 /* Bump by the struct size, but only if we're within a .struct section. */
960 if (current_stag != NULL && !current_stag->is_union)
961 abs_section_offset += stag->size;
962
963 *input_line_pointer = c;
964 demand_empty_rest_of_line ();
965 line_label = NULL;
966 }
967
968 /* Handle all .byte, .char, .double, .field, .float, .half, .int, .long,
969 .short, .string, .ubyte, .uchar, .uhalf, .uint, .ulong, .ushort, .uword,
970 and .word. */
971
972 static void
973 tic54x_struct_field (type)
974 int type;
975 {
976 int size;
977 int count = 1;
978 int new_bitfield_offset = 0;
979 int field_align = current_stag->current_bitfield_offset != 0;
980 int longword_align = 0;
981
982 SKIP_WHITESPACE ();
983 if (!is_end_of_line[(int) *input_line_pointer])
984 count = get_absolute_expression ();
985
986 switch (type)
987 {
988 case 'b':
989 case 'B':
990 case 'c':
991 case 'C':
992 case 'h':
993 case 'H':
994 case 'i':
995 case 'I':
996 case 's':
997 case 'S':
998 case 'w':
999 case 'W':
1000 case '*': /* String. */
1001 size = 1;
1002 break;
1003 case 'f':
1004 case 'l':
1005 case 'L':
1006 longword_align = 1;
1007 size = 2;
1008 break;
1009 case '.': /* Bitfield. */
1010 size = 0;
1011 if (count < 1 || count > 32)
1012 {
1013 as_bad (_(".field count '%d' out of range (1 <= X <= 32)"), count);
1014 ignore_rest_of_line ();
1015 return;
1016 }
1017 if (current_stag->current_bitfield_offset + count > 16)
1018 {
1019 /* Set the appropriate size and new field offset. */
1020 if (count == 32)
1021 {
1022 size = 2;
1023 count = 1;
1024 }
1025 else if (count > 16)
1026 {
1027 size = 1;
1028 count = 1;
1029 new_bitfield_offset = count - 16;
1030 }
1031 else
1032 new_bitfield_offset = count;
1033 }
1034 else
1035 {
1036 field_align = 0;
1037 new_bitfield_offset = current_stag->current_bitfield_offset + count;
1038 }
1039 break;
1040 default:
1041 as_bad (_("Unrecognized field type '%c'"), type);
1042 ignore_rest_of_line ();
1043 return;
1044 }
1045
1046 if (field_align)
1047 {
1048 /* Align to the actual starting position of the field. */
1049 current_stag->current_bitfield_offset = 0;
1050 ++abs_section_offset;
1051 }
1052 /* Align to longword boundary. */
1053 if (longword_align && (abs_section_offset & 0x1))
1054 ++abs_section_offset;
1055
1056 if (line_label == NULL)
1057 {
1058 static int fieldno = 0;
1059 char fake[] = ".fake_fieldNNNNN";
1060
1061 sprintf (fake, ".fake_field%d", fieldno++);
1062 stag_add_field (current_stag, fake,
1063 abs_section_offset - S_GET_VALUE (current_stag->sym),
1064 NULL);
1065 }
1066 else
1067 {
1068 char label[strlen (S_GET_NAME (line_label) + 1)];
1069
1070 strcpy (label, S_GET_NAME (line_label));
1071 stag_add_field (current_stag, label,
1072 abs_section_offset - S_GET_VALUE (current_stag->sym),
1073 NULL);
1074 }
1075
1076 if (current_stag->is_union)
1077 {
1078 /* Note we treat the element as if it were an array of COUNT. */
1079 if (current_stag->size < (unsigned) size * count)
1080 current_stag->size = size * count;
1081 }
1082 else
1083 {
1084 abs_section_offset += (unsigned) size * count;
1085 current_stag->current_bitfield_offset = new_bitfield_offset;
1086 }
1087 line_label = NULL;
1088 }
1089
1090 /* Handle .byte, .word. .int, .long and all variants. */
1091
1092 static void
1093 tic54x_cons (type)
1094 int type;
1095 {
1096 unsigned int c;
1097 int octets;
1098
1099 /* If we're within a .struct construct, don't actually allocate space. */
1100 if (current_stag != NULL)
1101 {
1102 tic54x_struct_field (type);
1103 return;
1104 }
1105
1106 #ifdef md_flush_pending_output
1107 md_flush_pending_output ();
1108 #endif
1109
1110 generate_lineno_debug ();
1111
1112 /* Align long words to long word boundaries (4 octets). */
1113 if (type == 'l' || type == 'L')
1114 {
1115 frag_align (2, 0, 2);
1116 /* If there's a label, assign it to the first allocated word. */
1117 if (line_label != NULL)
1118 {
1119 symbol_set_frag (line_label, frag_now);
1120 S_SET_VALUE (line_label, frag_now_fix ());
1121 }
1122 }
1123
1124 switch (type)
1125 {
1126 case 'l':
1127 case 'L':
1128 case 'x':
1129 octets = 4;
1130 break;
1131 case 'b':
1132 case 'B':
1133 case 'c':
1134 case 'C':
1135 octets = 1;
1136 break;
1137 default:
1138 octets = 2;
1139 break;
1140 }
1141
1142 do
1143 {
1144 if (*input_line_pointer == '"')
1145 {
1146 input_line_pointer++;
1147 while (is_a_char (c = next_char_of_string ()))
1148 tic54x_emit_char (c);
1149 know (input_line_pointer[-1] == '\"');
1150 }
1151 else
1152 {
1153 expressionS exp;
1154
1155 input_line_pointer = parse_expression (input_line_pointer, &exp);
1156 if (exp.X_op == O_constant)
1157 {
1158 offsetT value = exp.X_add_number;
1159 /* Truncate overflows. */
1160 switch (octets)
1161 {
1162 case 1:
1163 if ((value > 0 && value > 0xFF)
1164 || (value < 0 && value < - 0x100))
1165 as_warn ("Overflow in expression, truncated to 8 bits");
1166 break;
1167 case 2:
1168 if ((value > 0 && value > 0xFFFF)
1169 || (value < 0 && value < - 0x10000))
1170 as_warn ("Overflow in expression, truncated to 16 bits");
1171 break;
1172 }
1173 }
1174 if (exp.X_op != O_constant && octets < 2)
1175 {
1176 /* Disallow .byte with a non constant expression that will
1177 require relocation. */
1178 as_bad (_("Relocatable values require at least WORD storage"));
1179 ignore_rest_of_line ();
1180 return;
1181 }
1182
1183 if (exp.X_op != O_constant
1184 && amode == c_mode
1185 && octets == 4)
1186 {
1187 /* FIXME -- at one point TI tools used to output REL16
1188 relocations, but I don't think the latest tools do at all
1189 The current tools output extended relocations regardless of
1190 the addressing mode (I actually think that ".c_mode" is
1191 totally ignored in the latest tools). */
1192 amode = far_mode;
1193 emitting_long = 1;
1194 emit_expr (&exp, 4);
1195 emitting_long = 0;
1196 amode = c_mode;
1197 }
1198 else
1199 {
1200 emitting_long = octets == 4;
1201 emit_expr (&exp, (octets == 1) ? 2 : octets);
1202 emitting_long = 0;
1203 }
1204 }
1205 }
1206 while (*input_line_pointer++ == ',');
1207
1208 input_line_pointer--; /* Put terminator back into stream. */
1209 demand_empty_rest_of_line ();
1210 }
1211
1212 /* .global <symbol>[,...,<symbolN>]
1213 .def <symbol>[,...,<symbolN>]
1214 .ref <symbol>[,...,<symbolN>]
1215
1216 These all identify global symbols.
1217
1218 .def means the symbol is defined in the current module and can be accessed
1219 by other files. The symbol should be placed in the symbol table.
1220
1221 .ref means the symbol is used in the current module but defined in another
1222 module. The linker is to resolve this symbol's definition at link time.
1223
1224 .global should act as a .ref or .def, as needed.
1225
1226 global, def and ref all have symbol storage classes of C_EXT.
1227
1228 I can't identify any difference in how the "other" c54x assembler treats
1229 these, so we ignore the type here. */
1230
1231 void
1232 tic54x_global (type)
1233 int type;
1234 {
1235 char *name;
1236 int c;
1237 symbolS *symbolP;
1238
1239 if (type == 'r')
1240 as_warn (_("Use of .def/.ref is deprecated. Use .global instead"));
1241
1242 ILLEGAL_WITHIN_STRUCT ();
1243
1244 do
1245 {
1246 name = input_line_pointer;
1247 c = get_symbol_end ();
1248 symbolP = symbol_find_or_make (name);
1249
1250 *input_line_pointer = c;
1251 S_SET_STORAGE_CLASS (symbolP, C_EXT);
1252 if (c == ',')
1253 {
1254 input_line_pointer++;
1255 if (is_end_of_line[(int) *input_line_pointer])
1256 c = *input_line_pointer;
1257 }
1258 }
1259 while (c == ',');
1260
1261 demand_empty_rest_of_line ();
1262 }
1263
1264 /* Remove the symbol from the local label hash lookup. */
1265
1266 static void
1267 tic54x_remove_local_label (key, value)
1268 const char *key;
1269 PTR value ATTRIBUTE_UNUSED;
1270 {
1271 PTR *elem = hash_delete (local_label_hash[macro_level], key);
1272 free (elem);
1273 }
1274
1275 /* Reset all local labels. */
1276
1277 static void
1278 tic54x_clear_local_labels (ignored)
1279 int ignored ATTRIBUTE_UNUSED;
1280 {
1281 hash_traverse (local_label_hash[macro_level], tic54x_remove_local_label);
1282 }
1283
1284 /* .text
1285 .data
1286 .sect "section name"
1287
1288 Initialized section
1289 make sure local labels get cleared when changing sections
1290
1291 ARG is 't' for text, 'd' for data, or '*' for a named section
1292
1293 For compatibility, '*' sections are SEC_CODE if instructions are
1294 encountered, or SEC_DATA if not.
1295 */
1296
1297 static void
1298 tic54x_sect (arg)
1299 int arg;
1300 {
1301 ILLEGAL_WITHIN_STRUCT ();
1302
1303 /* Local labels are cleared when changing sections. */
1304 tic54x_clear_local_labels (0);
1305
1306 if (arg == 't')
1307 s_text (0);
1308 else if (arg == 'd')
1309 s_data (0);
1310 else
1311 {
1312 char *name = NULL;
1313 int len;
1314
1315 /* If there are quotes, remove them. */
1316 if (*input_line_pointer == '"')
1317 {
1318 name = demand_copy_C_string (&len);
1319 demand_empty_rest_of_line ();
1320 name = strcpy (xmalloc (len + 10), name);
1321 }
1322 else
1323 {
1324 int c;
1325 name = input_line_pointer;
1326 c = get_symbol_end ();
1327 len = strlen(name);
1328 name = strcpy (xmalloc (len + 10), name);
1329 *input_line_pointer = c;
1330 demand_empty_rest_of_line ();
1331 }
1332 /* Make sure all named initialized sections flagged properly. If we
1333 encounter instructions, we'll flag it with SEC_CODE as well. */
1334 strcat (name, ",\"w\"\n");
1335 input_scrub_insert_line (name);
1336 obj_coff_section (0);
1337
1338 /* If there was a line label, make sure that it gets assigned the proper
1339 section. This is for compatibility, even though the actual behavior
1340 is not explicitly defined. For consistency, we make .sect behave
1341 like .usect, since that is probably what people expect. */
1342 if (line_label != NULL)
1343 {
1344 S_SET_SEGMENT (line_label, now_seg);
1345 symbol_set_frag (line_label, frag_now);
1346 S_SET_VALUE (line_label, frag_now_fix ());
1347 if (S_GET_STORAGE_CLASS (line_label) != C_EXT)
1348 S_SET_STORAGE_CLASS (line_label, C_LABEL);
1349 }
1350 }
1351 }
1352
1353 /* [symbol] .space space_in_bits
1354 [symbol] .bes space_in_bits
1355 BES puts the symbol at the *last* word allocated
1356
1357 cribbed from s_space. */
1358
1359 static void
1360 tic54x_space (arg)
1361 int arg;
1362 {
1363 expressionS exp;
1364 char *p = 0;
1365 int octets = 0;
1366 long words;
1367 int bits_per_byte = (OCTETS_PER_BYTE * 8);
1368 int bit_offset = 0;
1369 symbolS *label = line_label;
1370 int bes = arg;
1371
1372 ILLEGAL_WITHIN_STRUCT ();
1373
1374 #ifdef md_flush_pending_output
1375 md_flush_pending_output ();
1376 #endif
1377
1378 /* Read the bit count. */
1379 expression (&exp);
1380
1381 /* Some expressions are unresolvable until later in the assembly pass;
1382 postpone until relaxation/fixup. we also have to postpone if a previous
1383 partial allocation has not been completed yet. */
1384 if (exp.X_op != O_constant || frag_bit_offset (frag_now, now_seg) == -1)
1385 {
1386 struct bit_info *bi = xmalloc (sizeof (struct bit_info));
1387 char *p;
1388
1389 bi->seg = now_seg;
1390 bi->type = bes;
1391 bi->sym = label;
1392 p = frag_var (rs_machine_dependent,
1393 65536 * 2, 1, (relax_substateT) 0,
1394 make_expr_symbol (&exp), (offsetT) 0,
1395 (char *) bi);
1396 if (p)
1397 *p = 0;
1398
1399 return;
1400 }
1401
1402 /* Reduce the required size by any bit offsets currently left over
1403 from a previous .space/.bes/.field directive. */
1404 bit_offset = frag_now->tc_frag_data;
1405 if (bit_offset != 0 && bit_offset < 16)
1406 {
1407 int spare_bits = bits_per_byte - bit_offset;
1408
1409 if (spare_bits >= exp.X_add_number)
1410 {
1411 /* Don't have to do anything; sufficient bits have already been
1412 allocated; just point the label to the right place. */
1413 if (label != NULL)
1414 {
1415 symbol_set_frag (label, frag_now);
1416 S_SET_VALUE (label, frag_now_fix () - 1);
1417 label = NULL;
1418 }
1419 frag_now->tc_frag_data += exp.X_add_number;
1420 goto getout;
1421 }
1422 exp.X_add_number -= spare_bits;
1423 /* Set the label to point to the first word allocated, which in this
1424 case is the previous word, which was only partially filled. */
1425 if (!bes && label != NULL)
1426 {
1427 symbol_set_frag (label, frag_now);
1428 S_SET_VALUE (label, frag_now_fix () - 1);
1429 label = NULL;
1430 }
1431 }
1432 /* Convert bits to bytes/words and octets, rounding up. */
1433 words = ((exp.X_add_number + bits_per_byte - 1) / bits_per_byte);
1434 /* How many do we have left over? */
1435 bit_offset = exp.X_add_number % bits_per_byte;
1436 octets = words * OCTETS_PER_BYTE;
1437 if (octets < 0)
1438 {
1439 as_warn (_(".space/.bes repeat count is negative, ignored"));
1440 goto getout;
1441 }
1442 else if (octets == 0)
1443 {
1444 as_warn (_(".space/.bes repeat count is zero, ignored"));
1445 goto getout;
1446 }
1447
1448 /* If we are in the absolute section, just bump the offset. */
1449 if (now_seg == absolute_section)
1450 {
1451 abs_section_offset += words;
1452 if (bes && label != NULL)
1453 S_SET_VALUE (label, abs_section_offset - 1);
1454 frag_now->tc_frag_data = bit_offset;
1455 goto getout;
1456 }
1457
1458 if (!need_pass_2)
1459 p = frag_var (rs_fill, 1, 1,
1460 (relax_substateT) 0, (symbolS *) 0,
1461 (offsetT) octets, (char *) 0);
1462
1463 /* Make note of how many bits of this word we've allocated so far. */
1464 frag_now->tc_frag_data = bit_offset;
1465
1466 /* .bes puts label at *last* word allocated. */
1467 if (bes && label != NULL)
1468 {
1469 symbol_set_frag (label, frag_now);
1470 S_SET_VALUE (label, frag_now_fix () - 1);
1471 }
1472
1473 if (p)
1474 *p = 0;
1475
1476 getout:
1477
1478 demand_empty_rest_of_line ();
1479 }
1480
1481 /* [symbol] .usect "section-name", size-in-words
1482 [, [blocking-flag] [, alignment-flag]]
1483
1484 Uninitialized section.
1485 Non-zero blocking means that if the section would cross a page (128-word)
1486 boundary, it will be page-aligned.
1487 Non-zero alignment aligns on a longword boundary.
1488
1489 Has no effect on the current section. */
1490
1491 static void
1492 tic54x_usect (x)
1493 int x ATTRIBUTE_UNUSED;
1494 {
1495 char c;
1496 char *name;
1497 char *section_name;
1498 char *p;
1499 segT seg;
1500 int size, blocking_flag, alignment_flag;
1501 segT current_seg;
1502 subsegT current_subseg;
1503 flagword flags;
1504
1505 ILLEGAL_WITHIN_STRUCT ();
1506
1507 current_seg = now_seg; /* Save current seg. */
1508 current_subseg = now_subseg; /* Save current subseg. */
1509
1510 if (*input_line_pointer == '"')
1511 input_line_pointer++;
1512 section_name = input_line_pointer;
1513 c = get_symbol_end (); /* Get terminator. */
1514 input_line_pointer++; /* Skip null symbol terminator. */
1515 name = xmalloc (input_line_pointer - section_name + 1);
1516 strcpy (name, section_name);
1517
1518 if (*input_line_pointer == ',')
1519 ++input_line_pointer;
1520 else if (c != ',')
1521 {
1522 as_bad (_("Missing size argument"));
1523 ignore_rest_of_line ();
1524 return;
1525 }
1526
1527 size = get_absolute_expression ();
1528
1529 /* Read a possibly present third argument (blocking flag). */
1530 if (*input_line_pointer == ',')
1531 {
1532 ++input_line_pointer;
1533 if (*input_line_pointer != ',')
1534 blocking_flag = get_absolute_expression ();
1535 else
1536 blocking_flag = 0;
1537
1538 /* Read a possibly present fourth argument (alignment flag). */
1539 if (*input_line_pointer == ',')
1540 {
1541 ++input_line_pointer;
1542 alignment_flag = get_absolute_expression ();
1543 }
1544 else
1545 alignment_flag = 0;
1546 }
1547 else
1548 blocking_flag = alignment_flag = 0;
1549
1550 seg = subseg_new (name, 0);
1551 flags = bfd_get_section_flags (stdoutput, seg) | SEC_ALLOC;
1552
1553 if (alignment_flag)
1554 {
1555 /* s_align eats end of line; restore it. */
1556 s_align_bytes (4);
1557 --input_line_pointer;
1558 }
1559
1560 if (line_label != NULL)
1561 {
1562 S_SET_SEGMENT (line_label, seg);
1563 symbol_set_frag (line_label, frag_now);
1564 S_SET_VALUE (line_label, frag_now_fix ());
1565 /* Set scl to label, since that's what TI does. */
1566 if (S_GET_STORAGE_CLASS (line_label) != C_EXT)
1567 S_SET_STORAGE_CLASS (line_label, C_LABEL);
1568 }
1569
1570 seg_info (seg)->bss = 1; /* Uninitialized data. */
1571
1572 p = frag_var (rs_fill, 1, 1,
1573 (relax_substateT) 0, (symbolS *) line_label,
1574 size * OCTETS_PER_BYTE, (char *) 0);
1575 *p = 0;
1576
1577 if (blocking_flag)
1578 flags |= SEC_TIC54X_BLOCK;
1579
1580 if (!bfd_set_section_flags (stdoutput, seg, flags))
1581 as_warn ("Error setting flags for \"%s\": %s", name,
1582 bfd_errmsg (bfd_get_error ()));
1583
1584 subseg_set (current_seg, current_subseg); /* Restore current seg. */
1585 demand_empty_rest_of_line ();
1586 }
1587
1588 static enum cpu_version
1589 lookup_version (ver)
1590 const char *ver;
1591 {
1592 enum cpu_version version = VNONE;
1593
1594 if (ver[0] == '5' && ver[1] == '4')
1595 {
1596 if (strlen (ver) == 3
1597 && (ver[2] == '1' || ver[2] == '2' || ver[2] == '3'
1598 || ver[2] == '5' || ver[2] == '8' || ver[2] == '9'))
1599 version = ver[2] - '0';
1600 else if (strlen (ver) == 5
1601 && TOUPPER (ver[3]) == 'L'
1602 && TOUPPER (ver[4]) == 'P'
1603 && (ver[2] == '5' || ver[2] == '6'))
1604 version = ver[2] - '0' + 10;
1605 }
1606
1607 return version;
1608 }
1609
1610 static void
1611 set_cpu (version)
1612 enum cpu_version version;
1613 {
1614 cpu = version;
1615 if (version == V545LP || version == V546LP)
1616 {
1617 symbolS *symbolP = symbol_new ("__allow_lp", absolute_section,
1618 (valueT) 1, &zero_address_frag);
1619 SF_SET_LOCAL (symbolP);
1620 symbol_table_insert (symbolP);
1621 }
1622 }
1623
1624 /* .version cpu-version
1625 cpu-version may be one of the following:
1626 541
1627 542
1628 543
1629 545
1630 545LP
1631 546LP
1632 548
1633 549
1634
1635 This is for compatibility only. It currently has no affect on assembly. */
1636 static int cpu_needs_set = 1;
1637
1638 static void
1639 tic54x_version (x)
1640 int x ATTRIBUTE_UNUSED;
1641 {
1642 enum cpu_version version = VNONE;
1643 enum cpu_version old_version = cpu;
1644 int c;
1645 char *ver;
1646
1647 ILLEGAL_WITHIN_STRUCT ();
1648
1649 SKIP_WHITESPACE ();
1650 ver = input_line_pointer;
1651 while (!is_end_of_line[(int) *input_line_pointer])
1652 ++input_line_pointer;
1653 c = *input_line_pointer;
1654 *input_line_pointer = 0;
1655
1656 version = lookup_version (ver);
1657
1658 if (cpu != VNONE && cpu != version)
1659 as_warn (_("CPU version has already been set"));
1660
1661 if (version == VNONE)
1662 {
1663 as_bad (_("Unrecognized version '%s'"), ver);
1664 ignore_rest_of_line ();
1665 return;
1666 }
1667 else if (assembly_begun && version != old_version)
1668 {
1669 as_bad (_("Changing of CPU version on the fly not supported"));
1670 ignore_rest_of_line ();
1671 return;
1672 }
1673
1674 set_cpu (version);
1675
1676 *input_line_pointer = c;
1677 demand_empty_rest_of_line ();
1678 }
1679
1680 /* 'f' = float, 'x' = xfloat, 'd' = double, 'l' = ldouble. */
1681
1682 static void
1683 tic54x_float_cons (type)
1684 int type;
1685 {
1686 if (current_stag != 0)
1687 tic54x_struct_field ('f');
1688
1689 #ifdef md_flush_pending_output
1690 md_flush_pending_output ();
1691 #endif
1692
1693 /* Align to long word boundary (4 octets) unless it's ".xfloat". */
1694 if (type != 'x')
1695 {
1696 frag_align (2, 0, 2);
1697 /* If there's a label, assign it to the first allocated word. */
1698 if (line_label != NULL)
1699 {
1700 symbol_set_frag (line_label, frag_now);
1701 S_SET_VALUE (line_label, frag_now_fix ());
1702 }
1703 }
1704
1705 float_cons ('f');
1706 }
1707
1708 /* The argument is capitalized if it should be zero-terminated
1709 's' is normal string with upper 8-bits zero-filled, 'p' is packed.
1710 Code copied from stringer, and slightly modified so that strings are packed
1711 and encoded into the correct octets. */
1712
1713 static void
1714 tic54x_stringer (type)
1715 int type;
1716 {
1717 unsigned int c;
1718 char *start;
1719 int append_zero = type == 'S' || type == 'P';
1720 int packed = type == 'p' || type == 'P';
1721 int last_char = -1; /* Packed strings need two bytes at a time to encode. */
1722
1723 if (current_stag != NULL)
1724 {
1725 tic54x_struct_field ('*');
1726 return;
1727 }
1728
1729 #ifdef md_flush_pending_output
1730 md_flush_pending_output ();
1731 #endif
1732
1733 c = ','; /* Do loop. */
1734 while (c == ',')
1735 {
1736 SKIP_WHITESPACE ();
1737 switch (*input_line_pointer)
1738 {
1739 default:
1740 {
1741 unsigned short value = get_absolute_expression ();
1742 FRAG_APPEND_1_CHAR ( value & 0xFF);
1743 FRAG_APPEND_1_CHAR ((value >> 8) & 0xFF);
1744 break;
1745 }
1746 case '\"':
1747 ++input_line_pointer; /* -> 1st char of string. */
1748 start = input_line_pointer;
1749 while (is_a_char (c = next_char_of_string ()))
1750 {
1751 if (!packed)
1752 {
1753 FRAG_APPEND_1_CHAR (c);
1754 FRAG_APPEND_1_CHAR (0);
1755 }
1756 else
1757 {
1758 /* Packed strings are filled MS octet first. */
1759 if (last_char == -1)
1760 last_char = c;
1761 else
1762 {
1763 FRAG_APPEND_1_CHAR (c);
1764 FRAG_APPEND_1_CHAR (last_char);
1765 last_char = -1;
1766 }
1767 }
1768 }
1769 if (append_zero)
1770 {
1771 if (packed && last_char != -1)
1772 {
1773 FRAG_APPEND_1_CHAR (0);
1774 FRAG_APPEND_1_CHAR (last_char);
1775 last_char = -1;
1776 }
1777 else
1778 {
1779 FRAG_APPEND_1_CHAR (0);
1780 FRAG_APPEND_1_CHAR (0);
1781 }
1782 }
1783 know (input_line_pointer[-1] == '\"');
1784 break;
1785 }
1786 SKIP_WHITESPACE ();
1787 c = *input_line_pointer;
1788 if (!is_end_of_line[c])
1789 ++input_line_pointer;
1790 }
1791
1792 /* Finish up any leftover packed string. */
1793 if (packed && last_char != -1)
1794 {
1795 FRAG_APPEND_1_CHAR (0);
1796 FRAG_APPEND_1_CHAR (last_char);
1797 }
1798 demand_empty_rest_of_line ();
1799 }
1800
1801 static void
1802 tic54x_p2align (arg)
1803 int arg ATTRIBUTE_UNUSED;
1804 {
1805 as_bad (_("p2align not supported on this target"));
1806 }
1807
1808 static void
1809 tic54x_align_words (arg)
1810 int arg;
1811 {
1812 /* Only ".align" with no argument is allowed within .struct/.union. */
1813 int count = arg;
1814
1815 if (!is_end_of_line[(int) *input_line_pointer])
1816 {
1817 if (arg == 2)
1818 as_warn (_("Argument to .even ignored"));
1819 else
1820 count = get_absolute_expression ();
1821 }
1822
1823 if (current_stag != NULL && arg == 128)
1824 {
1825 if (current_stag->current_bitfield_offset != 0)
1826 {
1827 current_stag->current_bitfield_offset = 0;
1828 ++abs_section_offset;
1829 }
1830 demand_empty_rest_of_line ();
1831 return;
1832 }
1833
1834 ILLEGAL_WITHIN_STRUCT ();
1835
1836 s_align_bytes (count << 1);
1837 }
1838
1839 /* Initialize multiple-bit fields withing a single word of memory. */
1840
1841 static void
1842 tic54x_field (ignore)
1843 int ignore ATTRIBUTE_UNUSED;
1844 {
1845 expressionS exp;
1846 int size = 16;
1847 char *p;
1848 valueT value;
1849 symbolS *label = line_label;
1850
1851 if (current_stag != NULL)
1852 {
1853 tic54x_struct_field ('.');
1854 return;
1855 }
1856
1857 input_line_pointer = parse_expression (input_line_pointer, &exp);
1858
1859 if (*input_line_pointer == ',')
1860 {
1861 ++input_line_pointer;
1862 size = get_absolute_expression ();
1863 if (size < 1 || size > 32)
1864 {
1865 as_bad (_("Invalid field size, must be from 1 to 32"));
1866 ignore_rest_of_line ();
1867 return;
1868 }
1869 }
1870
1871 /* Truncate values to the field width. */
1872 if (exp.X_op != O_constant)
1873 {
1874 /* If the expression value is relocatable, the field size *must*
1875 be 16. */
1876 if (size != 16)
1877 {
1878 as_bad (_("field size must be 16 when value is relocatable"));
1879 ignore_rest_of_line ();
1880 return;
1881 }
1882
1883 frag_now->tc_frag_data = 0;
1884 emit_expr (&exp, 2);
1885 }
1886 else
1887 {
1888 unsigned long fmask = (size == 32) ? 0xFFFFFFFF : (1ul << size) - 1;
1889
1890 value = exp.X_add_number;
1891 exp.X_add_number &= fmask;
1892 if (value != (valueT) exp.X_add_number)
1893 as_warn (_("field value truncated"));
1894 value = exp.X_add_number;
1895 /* Bits are stored MS first. */
1896 while (size >= 16)
1897 {
1898 frag_now->tc_frag_data = 0;
1899 p = frag_more (2);
1900 md_number_to_chars (p, (value >> (size - 16)) & 0xFFFF, 2);
1901 size -= 16;
1902 }
1903 if (size > 0)
1904 {
1905 int bit_offset = frag_bit_offset (frag_now, now_seg);
1906
1907 fragS *alloc_frag = bit_offset_frag (frag_now, now_seg);
1908 if (bit_offset == -1)
1909 {
1910 struct bit_info *bi = xmalloc (sizeof (struct bit_info));
1911 /* We don't know the previous offset at this time, so store the
1912 info we need and figure it out later. */
1913 expressionS size_exp;
1914
1915 size_exp.X_op = O_constant;
1916 size_exp.X_add_number = size;
1917 bi->seg = now_seg;
1918 bi->type = TYPE_FIELD;
1919 bi->value = value;
1920 p = frag_var (rs_machine_dependent,
1921 4, 1, (relax_substateT) 0,
1922 make_expr_symbol (&size_exp), (offsetT) 0,
1923 (char *) bi);
1924 goto getout;
1925 }
1926 else if (bit_offset == 0 || bit_offset + size > 16)
1927 {
1928 /* Align a new field. */
1929 p = frag_more (2);
1930 frag_now->tc_frag_data = 0;
1931 alloc_frag = frag_now;
1932 }
1933 else
1934 {
1935 /* Put the new value entirely within the existing one. */
1936 p = alloc_frag == frag_now ?
1937 frag_now->fr_literal + frag_now_fix_octets () - 2 :
1938 alloc_frag->fr_literal;
1939 if (label != NULL)
1940 {
1941 symbol_set_frag (label, alloc_frag);
1942 if (alloc_frag == frag_now)
1943 S_SET_VALUE (label, frag_now_fix () - 1);
1944 label = NULL;
1945 }
1946 }
1947 value <<= 16 - alloc_frag->tc_frag_data - size;
1948
1949 /* OR in existing value. */
1950 if (alloc_frag->tc_frag_data)
1951 value |= ((unsigned short) p[1] << 8) | p[0];
1952 md_number_to_chars (p, value, 2);
1953 alloc_frag->tc_frag_data += size;
1954 if (alloc_frag->tc_frag_data == 16)
1955 alloc_frag->tc_frag_data = 0;
1956 }
1957 }
1958 getout:
1959 demand_empty_rest_of_line ();
1960 }
1961
1962 /* Ideally, we want to check SEC_LOAD and SEC_HAS_CONTENTS, but those aren't
1963 available yet. seg_info ()->bss is the next best thing. */
1964
1965 static int
1966 tic54x_initialized_section (seg)
1967 segT seg;
1968 {
1969 return !seg_info (seg)->bss;
1970 }
1971
1972 /* .clink ["section name"]
1973
1974 Marks the section as conditionally linked (link only if contents are
1975 referenced elsewhere.
1976 Without a name, refers to the current initialized section.
1977 Name is required for uninitialized sections. */
1978
1979 static void
1980 tic54x_clink (ignored)
1981 int ignored ATTRIBUTE_UNUSED;
1982 {
1983 segT seg = now_seg;
1984
1985 ILLEGAL_WITHIN_STRUCT ();
1986
1987 if (*input_line_pointer == '\"')
1988 {
1989 char *section_name = ++input_line_pointer;
1990 char *name;
1991
1992 while (is_a_char (next_char_of_string ()))
1993 ;
1994 know (input_line_pointer[-1] == '\"');
1995 input_line_pointer[-1] = 0;
1996 name = xmalloc (input_line_pointer - section_name + 1);
1997 strcpy (name, section_name);
1998
1999 seg = bfd_get_section_by_name (stdoutput, name);
2000 if (seg == NULL)
2001 {
2002 as_bad (_("Unrecognized section '%s'"), section_name);
2003 ignore_rest_of_line ();
2004 return;
2005 }
2006 }
2007 else
2008 {
2009 if (!tic54x_initialized_section (seg))
2010 {
2011 as_bad (_("Current section is unitialized, "
2012 "section name required for .clink"));
2013 ignore_rest_of_line ();
2014 return;
2015 }
2016 }
2017
2018 seg->flags |= SEC_TIC54X_CLINK;
2019
2020 demand_empty_rest_of_line ();
2021 }
2022
2023 /* Change the default include directory to be the current source file's
2024 directory, instead of the current working directory. If DOT is non-zero,
2025 set to "." instead. */
2026
2027 static void
2028 tic54x_set_default_include (dot)
2029 int dot;
2030 {
2031 char *dir = ".";
2032 char *tmp = NULL;
2033
2034 if (!dot)
2035 {
2036 char *curfile;
2037 unsigned lineno;
2038
2039 as_where (&curfile, &lineno);
2040 dir = strcpy (xmalloc (strlen (curfile) + 1), curfile);
2041 tmp = strrchr (dir, '/');
2042 }
2043 if (tmp != NULL)
2044 {
2045 int len;
2046
2047 *tmp = '\0';
2048 len = strlen (dir);
2049 if (include_dir_count == 0)
2050 {
2051 include_dirs = (char **) xmalloc (sizeof (*include_dirs));
2052 include_dir_count = 1;
2053 }
2054 include_dirs[0] = dir;
2055 if (len > include_dir_maxlen)
2056 include_dir_maxlen = len;
2057 }
2058 else if (include_dirs != NULL)
2059 include_dirs[0] = ".";
2060 }
2061
2062 /* .include "filename" | filename
2063 .copy "filename" | filename
2064
2065 FIXME 'include' file should be omitted from any output listing,
2066 'copy' should be included in any output listing
2067 FIXME -- prevent any included files from changing listing (compat only)
2068 FIXME -- need to include source file directory in search path; what's a
2069 good way to do this?
2070
2071 Entering/exiting included/copied file clears all local labels. */
2072
2073 static void
2074 tic54x_include (ignored)
2075 int ignored ATTRIBUTE_UNUSED;
2076 {
2077 char newblock[] = " .newblock\n";
2078 char *filename;
2079 char *input;
2080 int len, c = -1;
2081
2082 ILLEGAL_WITHIN_STRUCT ();
2083
2084 SKIP_WHITESPACE ();
2085
2086 if (*input_line_pointer == '"')
2087 {
2088 filename = demand_copy_C_string (&len);
2089 demand_empty_rest_of_line ();
2090 }
2091 else
2092 {
2093 filename = input_line_pointer;
2094 while (!is_end_of_line[(int) *input_line_pointer])
2095 ++input_line_pointer;
2096 c = *input_line_pointer;
2097 *input_line_pointer = '\0';
2098 filename = strcpy (xmalloc (strlen (filename) + 1), filename);
2099 *input_line_pointer = c;
2100 demand_empty_rest_of_line ();
2101 }
2102 /* Insert a partial line with the filename (for the sake of s_include)
2103 and a .newblock.
2104 The included file will be inserted before the newblock, so that the
2105 newblock is executed after the included file is processed. */
2106 input = xmalloc (sizeof (newblock) + strlen (filename) + 4);
2107 sprintf (input, "\"%s\"\n%s", filename, newblock);
2108 input_scrub_insert_line (input);
2109
2110 tic54x_clear_local_labels (0);
2111
2112 tic54x_set_default_include (0);
2113
2114 s_include (0);
2115 }
2116
2117 static void
2118 tic54x_message (type)
2119 int type;
2120 {
2121 char *msg;
2122 char c;
2123 int len;
2124
2125 ILLEGAL_WITHIN_STRUCT ();
2126
2127 if (*input_line_pointer == '"')
2128 msg = demand_copy_C_string (&len);
2129 else
2130 {
2131 msg = input_line_pointer;
2132 while (!is_end_of_line[(int) *input_line_pointer])
2133 ++input_line_pointer;
2134 c = *input_line_pointer;
2135 *input_line_pointer = 0;
2136 msg = strcpy (xmalloc (strlen (msg) + 1), msg);
2137 *input_line_pointer = c;
2138 }
2139
2140 switch (type)
2141 {
2142 case 'm':
2143 as_tsktsk ("%s", msg);
2144 break;
2145 case 'w':
2146 as_warn ("%s", msg);
2147 break;
2148 case 'e':
2149 as_bad ("%s", msg);
2150 break;
2151 }
2152
2153 demand_empty_rest_of_line ();
2154 }
2155
2156 /* .label <symbol>
2157 Define a special symbol that refers to the loadtime address rather than the
2158 runtime address within the current section.
2159
2160 This symbol gets a special storage class so that when it is resolved, it is
2161 resolved relative to the load address (lma) of the section rather than the
2162 run address (vma). */
2163
2164 static void
2165 tic54x_label (ignored)
2166 int ignored ATTRIBUTE_UNUSED;
2167 {
2168 char *name = input_line_pointer;
2169 symbolS *symbolP;
2170 int c;
2171
2172 ILLEGAL_WITHIN_STRUCT ();
2173
2174 c = get_symbol_end ();
2175 symbolP = colon (name);
2176 S_SET_STORAGE_CLASS (symbolP, C_STATLAB);
2177
2178 *input_line_pointer = c;
2179 demand_empty_rest_of_line ();
2180 }
2181
2182 /* .mmregs
2183 Install all memory-mapped register names into the symbol table as
2184 absolute local symbols. */
2185
2186 static void
2187 tic54x_mmregs (ignored)
2188 int ignored ATTRIBUTE_UNUSED;
2189 {
2190 symbol *sym;
2191
2192 ILLEGAL_WITHIN_STRUCT ();
2193
2194 for (sym = (symbol *) mmregs; sym->name; sym++)
2195 {
2196 symbolS *symbolP = symbol_new (sym->name, absolute_section,
2197 (valueT) sym->value, &zero_address_frag);
2198 SF_SET_LOCAL (symbolP);
2199 symbol_table_insert (symbolP);
2200 }
2201 }
2202
2203 /* .loop [count]
2204 Count defaults to 1024. */
2205
2206 static void
2207 tic54x_loop (count)
2208 int count;
2209 {
2210 ILLEGAL_WITHIN_STRUCT ();
2211
2212 SKIP_WHITESPACE ();
2213 if (!is_end_of_line[(int) *input_line_pointer])
2214 count = get_absolute_expression ();
2215
2216 do_repeat (count, "LOOP", "ENDLOOP");
2217 }
2218
2219 /* Normally, endloop gets eaten by the preceding loop. */
2220
2221 static void
2222 tic54x_endloop (ignore)
2223 int ignore ATTRIBUTE_UNUSED;
2224 {
2225 as_bad (_("ENDLOOP without corresponding LOOP"));
2226 ignore_rest_of_line ();
2227 }
2228
2229 /* .break [condition]. */
2230
2231 static void
2232 tic54x_break (ignore)
2233 int ignore ATTRIBUTE_UNUSED;
2234 {
2235 int cond = 1;
2236
2237 ILLEGAL_WITHIN_STRUCT ();
2238
2239 SKIP_WHITESPACE ();
2240 if (!is_end_of_line[(int) *input_line_pointer])
2241 cond = get_absolute_expression ();
2242
2243 if (cond)
2244 end_repeat (substitution_line ? 1 : 0);
2245 }
2246
2247 static void
2248 set_address_mode (mode)
2249 int mode;
2250 {
2251 amode = mode;
2252 if (mode == far_mode)
2253 {
2254 symbolS *symbolP = symbol_new ("__allow_far", absolute_section,
2255 (valueT) 1, &zero_address_frag);
2256 SF_SET_LOCAL (symbolP);
2257 symbol_table_insert (symbolP);
2258 }
2259 }
2260
2261 static int address_mode_needs_set = 1;
2262
2263 static void
2264 tic54x_address_mode (mode)
2265 int mode;
2266 {
2267 if (assembly_begun && amode != (unsigned) mode)
2268 {
2269 as_bad (_("Mixing of normal and extended addressing not supported"));
2270 ignore_rest_of_line ();
2271 return;
2272 }
2273 if (mode == far_mode && cpu != VNONE && cpu != V548 && cpu != V549)
2274 {
2275 as_bad (_("Extended addressing not supported on the specified CPU"));
2276 ignore_rest_of_line ();
2277 return;
2278 }
2279
2280 set_address_mode (mode);
2281 demand_empty_rest_of_line ();
2282 }
2283
2284 /* .sblock "section"|section [,...,"section"|section]
2285 Designate initialized sections for blocking. */
2286
2287 static void
2288 tic54x_sblock (ignore)
2289 int ignore ATTRIBUTE_UNUSED;
2290 {
2291 int c = ',';
2292
2293 ILLEGAL_WITHIN_STRUCT ();
2294
2295 while (c == ',')
2296 {
2297 segT seg;
2298 char *name;
2299
2300 if (*input_line_pointer == '"')
2301 {
2302 int len;
2303
2304 name = demand_copy_C_string (&len);
2305 }
2306 else
2307 {
2308 char *section_name = input_line_pointer;
2309
2310 c = get_symbol_end ();
2311 name = xmalloc (strlen (section_name) + 1);
2312 strcpy (name, section_name);
2313 *input_line_pointer = c;
2314 }
2315
2316 seg = bfd_get_section_by_name (stdoutput, name);
2317 if (seg == NULL)
2318 {
2319 as_bad (_("Unrecognized section '%s'"), name);
2320 ignore_rest_of_line ();
2321 return;
2322 }
2323 else if (!tic54x_initialized_section (seg))
2324 {
2325 as_bad (_(".sblock may be used for initialized sections only"));
2326 ignore_rest_of_line ();
2327 return;
2328 }
2329 seg->flags |= SEC_TIC54X_BLOCK;
2330
2331 c = *input_line_pointer;
2332 if (!is_end_of_line[(int) c])
2333 ++input_line_pointer;
2334 }
2335
2336 demand_empty_rest_of_line ();
2337 }
2338
2339 /* symbol .set value
2340 symbol .equ value
2341
2342 value must be defined externals; no forward-referencing allowed
2343 symbols assigned with .set/.equ may not be redefined. */
2344
2345 static void
2346 tic54x_set (ignore)
2347 int ignore ATTRIBUTE_UNUSED;
2348 {
2349 symbolS *symbolP;
2350 char *name;
2351
2352 ILLEGAL_WITHIN_STRUCT ();
2353
2354 if (!line_label)
2355 {
2356 as_bad (_("Symbol missing for .set/.equ"));
2357 ignore_rest_of_line ();
2358 return;
2359 }
2360 name = xstrdup (S_GET_NAME (line_label));
2361 line_label = NULL;
2362 if ((symbolP = symbol_find (name)) == NULL
2363 && (symbolP = md_undefined_symbol (name)) == NULL)
2364 {
2365 symbolP = symbol_new (name, absolute_section, 0, &zero_address_frag);
2366 S_SET_STORAGE_CLASS (symbolP, C_STAT);
2367 }
2368 free (name);
2369 S_SET_DATA_TYPE (symbolP, T_INT);
2370 S_SET_SEGMENT (symbolP, absolute_section);
2371 symbol_table_insert (symbolP);
2372 pseudo_set (symbolP);
2373 demand_empty_rest_of_line ();
2374 }
2375
2376 /* .fclist
2377 .fcnolist
2378 List false conditional blocks. */
2379
2380 static void
2381 tic54x_fclist (show)
2382 int show;
2383 {
2384 if (show)
2385 listing &= ~LISTING_NOCOND;
2386 else
2387 listing |= LISTING_NOCOND;
2388 demand_empty_rest_of_line ();
2389 }
2390
2391 static void
2392 tic54x_sslist (show)
2393 int show;
2394 {
2395 ILLEGAL_WITHIN_STRUCT ();
2396
2397 listing_sslist = show;
2398 }
2399
2400 /* .var SYM[,...,SYMN]
2401 Define a substitution string to be local to a macro. */
2402
2403 static void
2404 tic54x_var (ignore)
2405 int ignore ATTRIBUTE_UNUSED;
2406 {
2407 static char empty[] = "";
2408 char *name;
2409 int c;
2410
2411 ILLEGAL_WITHIN_STRUCT ();
2412
2413 if (macro_level == 0)
2414 {
2415 as_bad (_(".var may only be used within a macro definition"));
2416 ignore_rest_of_line ();
2417 return;
2418 }
2419 do
2420 {
2421 if (!ISALPHA (*input_line_pointer))
2422 {
2423 as_bad (_("Substitution symbols must begin with a letter"));
2424 ignore_rest_of_line ();
2425 return;
2426 }
2427 name = input_line_pointer;
2428 c = get_symbol_end ();
2429 /* .var symbols start out with a null string. */
2430 name = strcpy (xmalloc (strlen (name) + 1), name);
2431 hash_insert (subsym_hash[macro_level], name, empty);
2432 *input_line_pointer = c;
2433 if (c == ',')
2434 {
2435 ++input_line_pointer;
2436 if (is_end_of_line[(int) *input_line_pointer])
2437 c = *input_line_pointer;
2438 }
2439 }
2440 while (c == ',');
2441
2442 demand_empty_rest_of_line ();
2443 }
2444
2445 /* .mlib <macro library filename>
2446
2447 Macro libraries are archived (standard AR-format) text macro definitions
2448 Expand the file and include it.
2449
2450 FIXME need to try the source file directory as well. */
2451
2452 static void
2453 tic54x_mlib (ignore)
2454 int ignore ATTRIBUTE_UNUSED;
2455 {
2456 char *filename;
2457 char *path;
2458 int len, i;
2459 bfd *abfd, *mbfd;
2460
2461 ILLEGAL_WITHIN_STRUCT ();
2462
2463 /* Parse the filename. */
2464 if (*input_line_pointer == '"')
2465 {
2466 if ((filename = demand_copy_C_string (&len)) == NULL)
2467 return;
2468 }
2469 else
2470 {
2471 SKIP_WHITESPACE ();
2472 len = 0;
2473 while (!is_end_of_line[(int) *input_line_pointer]
2474 && !ISSPACE (*input_line_pointer))
2475 {
2476 obstack_1grow (&notes, *input_line_pointer);
2477 ++input_line_pointer;
2478 ++len;
2479 }
2480 obstack_1grow (&notes, '\0');
2481 filename = obstack_finish (&notes);
2482 }
2483 demand_empty_rest_of_line ();
2484
2485 tic54x_set_default_include (0);
2486 path = xmalloc ((unsigned long) len + include_dir_maxlen + 5);
2487
2488 for (i = 0; i < include_dir_count; i++)
2489 {
2490 FILE *try;
2491
2492 strcpy (path, include_dirs[i]);
2493 strcat (path, "/");
2494 strcat (path, filename);
2495 if ((try = fopen (path, "r")) != NULL)
2496 {
2497 fclose (try);
2498 break;
2499 }
2500 }
2501
2502 if (i >= include_dir_count)
2503 {
2504 free (path);
2505 path = filename;
2506 }
2507
2508 /* FIXME: if path is found, malloc'd storage is not freed. Of course, this
2509 happens all over the place, and since the assembler doesn't usually keep
2510 running for a very long time, it really doesn't matter. */
2511 register_dependency (path);
2512
2513 /* Expand all archive entries to temporary files and include them. */
2514 abfd = bfd_openr (path, NULL);
2515 if (!abfd)
2516 {
2517 as_bad (_("Can't open macro library file '%s' for reading."), path);
2518 as_perror ("%s", path);
2519 ignore_rest_of_line ();
2520 return;
2521 }
2522 if (!bfd_check_format (abfd, bfd_archive))
2523 {
2524 as_bad (_("File '%s' not in macro archive format"), path);
2525 ignore_rest_of_line ();
2526 return;
2527 }
2528
2529 /* Open each BFD as binary (it should be straight ASCII text). */
2530 for (mbfd = bfd_openr_next_archived_file (abfd, NULL);
2531 mbfd != NULL; mbfd = bfd_openr_next_archived_file (abfd, mbfd))
2532 {
2533 /* Get a size at least as big as the archive member. */
2534 bfd_size_type size = bfd_get_size (mbfd);
2535 char *buf = xmalloc (size);
2536 char *fname = tmpnam (NULL);
2537 FILE *ftmp;
2538
2539 /* We're not sure how big it is, but it will be smaller than "size". */
2540 bfd_bread (buf, size, mbfd);
2541
2542 /* Write to a temporary file, then use s_include to include it
2543 a bit of a hack. */
2544 ftmp = fopen (fname, "w+b");
2545 fwrite ((void *) buf, size, 1, ftmp);
2546 if (buf[size - 1] != '\n')
2547 fwrite ("\n", 1, 1, ftmp);
2548 fclose (ftmp);
2549 free (buf);
2550 input_scrub_insert_file (fname);
2551 unlink (fname);
2552 }
2553 }
2554
2555 const pseudo_typeS md_pseudo_table[] =
2556 {
2557 { "algebraic", s_ignore , 0 },
2558 { "align" , tic54x_align_words , 128 },
2559 { "ascii" , tic54x_stringer , 'p' },
2560 { "asciz" , tic54x_stringer , 'P' },
2561 { "even" , tic54x_align_words , 2 },
2562 { "asg" , tic54x_asg , 0 },
2563 { "eval" , tic54x_eval , 0 },
2564 { "bss" , tic54x_bss , 0 },
2565 { "byte" , tic54x_cons , 'b' },
2566 { "ubyte" , tic54x_cons , 'B' },
2567 { "char" , tic54x_cons , 'c' },
2568 { "uchar" , tic54x_cons , 'C' },
2569 { "clink" , tic54x_clink , 0 },
2570 { "c_mode" , tic54x_address_mode , c_mode },
2571 { "copy" , tic54x_include , 'c' },
2572 { "include" , tic54x_include , 'i' },
2573 { "data" , tic54x_sect , 'd' },
2574 { "double" , tic54x_float_cons , 'd' },
2575 { "ldouble" , tic54x_float_cons , 'l' },
2576 { "drlist" , s_ignore , 0 },
2577 { "drnolist" , s_ignore , 0 },
2578 { "emsg" , tic54x_message , 'e' },
2579 { "mmsg" , tic54x_message , 'm' },
2580 { "wmsg" , tic54x_message , 'w' },
2581 { "far_mode" , tic54x_address_mode , far_mode },
2582 { "fclist" , tic54x_fclist , 1 },
2583 { "fcnolist" , tic54x_fclist , 0 },
2584 { "field" , tic54x_field , -1 },
2585 { "float" , tic54x_float_cons , 'f' },
2586 { "xfloat" , tic54x_float_cons , 'x' },
2587 { "global" , tic54x_global , 'g' },
2588 { "def" , tic54x_global , 'd' },
2589 { "ref" , tic54x_global , 'r' },
2590 { "half" , tic54x_cons , 'h' },
2591 { "uhalf" , tic54x_cons , 'H' },
2592 { "short" , tic54x_cons , 's' },
2593 { "ushort" , tic54x_cons , 'S' },
2594 { "if" , s_if , (int) O_ne },
2595 { "elseif" , s_elseif , (int) O_ne },
2596 { "else" , s_else , 0 },
2597 { "endif" , s_endif , 0 },
2598 { "int" , tic54x_cons , 'i' },
2599 { "uint" , tic54x_cons , 'I' },
2600 { "word" , tic54x_cons , 'w' },
2601 { "uword" , tic54x_cons , 'W' },
2602 { "label" , tic54x_label , 0 }, /* Loadtime
2603 address. */
2604 { "length" , s_ignore , 0 },
2605 { "width" , s_ignore , 0 },
2606 { "long" , tic54x_cons , 'l' },
2607 { "ulong" , tic54x_cons , 'L' },
2608 { "xlong" , tic54x_cons , 'x' },
2609 { "loop" , tic54x_loop , 1024 },
2610 { "break" , tic54x_break , 0 },
2611 { "endloop" , tic54x_endloop , 0 },
2612 { "mlib" , tic54x_mlib , 0 },
2613 { "mlist" , s_ignore , 0 },
2614 { "mnolist" , s_ignore , 0 },
2615 { "mmregs" , tic54x_mmregs , 0 },
2616 { "newblock" , tic54x_clear_local_labels, 0 },
2617 { "option" , s_ignore , 0 },
2618 { "p2align" , tic54x_p2align , 0 },
2619 { "sblock" , tic54x_sblock , 0 },
2620 { "sect" , tic54x_sect , '*' },
2621 { "set" , tic54x_set , 0 },
2622 { "equ" , tic54x_set , 0 },
2623 { "space" , tic54x_space , 0 },
2624 { "bes" , tic54x_space , 1 },
2625 { "sslist" , tic54x_sslist , 1 },
2626 { "ssnolist" , tic54x_sslist , 0 },
2627 { "string" , tic54x_stringer , 's' },
2628 { "pstring" , tic54x_stringer , 'p' },
2629 { "struct" , tic54x_struct , 0 },
2630 { "tag" , tic54x_tag , 0 },
2631 { "endstruct", tic54x_endstruct , 0 },
2632 { "tab" , s_ignore , 0 },
2633 { "text" , tic54x_sect , 't' },
2634 { "union" , tic54x_struct , 1 },
2635 { "endunion" , tic54x_endstruct , 1 },
2636 { "usect" , tic54x_usect , 0 },
2637 { "var" , tic54x_var , 0 },
2638 { "version" , tic54x_version , 0 },
2639 {0 , 0 , 0 }
2640 };
2641
2642 int
2643 md_parse_option (c, arg)
2644 int c;
2645 char *arg;
2646 {
2647 switch (c)
2648 {
2649 default:
2650 return 0;
2651 case OPTION_COFF_VERSION:
2652 {
2653 int version = atoi (arg);
2654
2655 if (version != 0 && version != 1 && version != 2)
2656 as_fatal (_("Bad COFF version '%s'"), arg);
2657 /* FIXME -- not yet implemented. */
2658 break;
2659 }
2660 case OPTION_CPU_VERSION:
2661 {
2662 cpu = lookup_version (arg);
2663 cpu_needs_set = 1;
2664 if (cpu == VNONE)
2665 as_fatal (_("Bad CPU version '%s'"), arg);
2666 break;
2667 }
2668 case OPTION_ADDRESS_MODE:
2669 amode = far_mode;
2670 address_mode_needs_set = 1;
2671 break;
2672 case OPTION_STDERR_TO_FILE:
2673 {
2674 char *filename = arg;
2675 FILE *fp = fopen (filename, "w+");
2676
2677 if (fp == NULL)
2678 as_fatal (_("Can't redirect stderr to the file '%s'"), filename);
2679 fclose (fp);
2680 if ((fp = freopen (filename, "w+", stderr)) == NULL)
2681 as_fatal (_("Can't redirect stderr to the file '%s'"), filename);
2682 break;
2683 }
2684 }
2685
2686 return 1;
2687 }
2688
2689 /* Create a "local" substitution string hash table for a new macro level
2690 Some docs imply that macros have to use .newblock in order to be able
2691 to re-use a local label. We effectively do an automatic .newblock by
2692 deleting the local label hash between macro invocations. */
2693
2694 void
2695 tic54x_macro_start ()
2696 {
2697 ++macro_level;
2698 subsym_hash[macro_level] = hash_new ();
2699 local_label_hash[macro_level] = hash_new ();
2700 }
2701
2702 void
2703 tic54x_macro_info (macro)
2704 const macro_entry *macro;
2705 {
2706 const formal_entry *entry;
2707
2708 /* Put the formal args into the substitution symbol table. */
2709 for (entry = macro->formals; entry; entry = entry->next)
2710 {
2711 char *name = strncpy (xmalloc (entry->name.len + 1),
2712 entry->name.ptr, entry->name.len);
2713 char *value = strncpy (xmalloc (entry->actual.len + 1),
2714 entry->actual.ptr, entry->actual.len);
2715
2716 name[entry->name.len] = '\0';
2717 value[entry->actual.len] = '\0';
2718 hash_insert (subsym_hash[macro_level], name, value);
2719 }
2720 }
2721
2722 /* Get rid of this macro's .var's, arguments, and local labels. */
2723
2724 void
2725 tic54x_macro_end ()
2726 {
2727 hash_die (subsym_hash[macro_level]);
2728 subsym_hash[macro_level] = NULL;
2729 hash_die (local_label_hash[macro_level]);
2730 local_label_hash[macro_level] = NULL;
2731 --macro_level;
2732 }
2733
2734 static int
2735 subsym_symlen (a, ignore)
2736 char *a;
2737 char *ignore ATTRIBUTE_UNUSED;
2738 {
2739 return strlen (a);
2740 }
2741
2742 /* Compare symbol A to string B. */
2743
2744 static int
2745 subsym_symcmp (a, b)
2746 char *a;
2747 char *b;
2748 {
2749 return strcmp (a, b);
2750 }
2751
2752 /* Return the index of the first occurrence of B in A, or zero if none
2753 assumes b is an integer char value as a string. Index is one-based. */
2754
2755 static int
2756 subsym_firstch (a, b)
2757 char *a;
2758 char *b;
2759 {
2760 int val = atoi (b);
2761 char *tmp = strchr (a, val);
2762
2763 return tmp ? tmp - a + 1 : 0;
2764 }
2765
2766 /* Similar to firstch, but returns index of last occurrence of B in A. */
2767
2768 static int
2769 subsym_lastch (a, b)
2770 char *a;
2771 char *b;
2772 {
2773 int val = atoi (b);
2774 char *tmp = strrchr (a, val);
2775
2776 return tmp ? tmp - a + 1 : 0;
2777 }
2778
2779 /* Returns 1 if string A is defined in the symbol table (NOT the substitution
2780 symbol table). */
2781
2782 static int
2783 subsym_isdefed (a, ignore)
2784 char *a;
2785 char *ignore ATTRIBUTE_UNUSED;
2786 {
2787 symbolS *symbolP = symbol_find (a);
2788
2789 return symbolP != NULL;
2790 }
2791
2792 /* Assign first member of comma-separated list B (e.g. "1,2,3") to the symbol
2793 A, or zero if B is a null string. Both arguments *must* be substitution
2794 symbols, unsubstituted. */
2795
2796 static int
2797 subsym_ismember (sym, list)
2798 char *sym;
2799 char *list;
2800 {
2801 char *elem, *ptr, *listv;
2802
2803 if (!list)
2804 return 0;
2805
2806 listv = subsym_lookup (list, macro_level);
2807 if (!listv)
2808 {
2809 as_bad (_("Undefined substitution symbol '%s'"), list);
2810 ignore_rest_of_line ();
2811 return 0;
2812 }
2813
2814 ptr = elem = xmalloc (strlen (listv) + 1);
2815 strcpy (elem, listv);
2816 while (*ptr && *ptr != ',')
2817 ++ptr;
2818 *ptr++ = 0;
2819
2820 subsym_create_or_replace (sym, elem);
2821
2822 /* Reassign the list. */
2823 subsym_create_or_replace (list, ptr);
2824
2825 /* Assume this value, docs aren't clear. */
2826 return *list != 0;
2827 }
2828
2829 /* Return zero if not a constant; otherwise:
2830 1 if binary
2831 2 if octal
2832 3 if hexadecimal
2833 4 if character
2834 5 if decimal. */
2835
2836 static int
2837 subsym_iscons (a, ignore)
2838 char *a;
2839 char *ignore ATTRIBUTE_UNUSED;
2840 {
2841 expressionS exp;
2842
2843 parse_expression (a, &exp);
2844
2845 if (exp.X_op == O_constant)
2846 {
2847 int len = strlen (a);
2848
2849 switch (TOUPPER (a[len - 1]))
2850 {
2851 case 'B':
2852 return 1;
2853 case 'Q':
2854 return 2;
2855 case 'H':
2856 return 3;
2857 case '\'':
2858 return 4;
2859 default:
2860 break;
2861 }
2862 /* No suffix; either octal, hex, or decimal. */
2863 if (*a == '0' && len > 1)
2864 {
2865 if (TOUPPER (a[1]) == 'X')
2866 return 3;
2867 return 2;
2868 }
2869 return 5;
2870 }
2871
2872 return 0;
2873 }
2874
2875 /* Return 1 if A is a valid symbol name. Expects string input. */
2876
2877 static int
2878 subsym_isname (a, ignore)
2879 char *a;
2880 char *ignore ATTRIBUTE_UNUSED;
2881 {
2882 if (!is_name_beginner (*a))
2883 return 0;
2884 while (*a)
2885 {
2886 if (!is_part_of_name (*a))
2887 return 0;
2888 ++a;
2889 }
2890 return 1;
2891 }
2892
2893 /* Return whether the string is a register; accepts ar0-7, unless .mmregs has
2894 been seen; if so, recognize any memory-mapped register.
2895 Note this does not recognize "A" or "B" accumulators. */
2896
2897 static int
2898 subsym_isreg (a, ignore)
2899 char *a;
2900 char *ignore ATTRIBUTE_UNUSED;
2901 {
2902 if (hash_find (reg_hash, a))
2903 return 1;
2904 if (hash_find (mmreg_hash, a))
2905 return 1;
2906 return 0;
2907 }
2908
2909 /* Return the structure size, given the stag. */
2910
2911 static int
2912 subsym_structsz (name, ignore)
2913 char *name;
2914 char *ignore ATTRIBUTE_UNUSED;
2915 {
2916 struct stag *stag = (struct stag *) hash_find (stag_hash, name);
2917
2918 if (stag)
2919 return stag->size;
2920
2921 return 0;
2922 }
2923
2924 /* If anybody actually uses this, they can fix it :)
2925 FIXME I'm not sure what the "reference point" of a structure is. It might
2926 be either the initial offset given .struct, or it may be the offset of the
2927 structure within another structure, or it might be something else
2928 altogether. since the TI assembler doesn't seem to ever do anything but
2929 return zero, we punt and return zero. */
2930
2931 static int
2932 subsym_structacc (stag_name, ignore)
2933 char *stag_name ATTRIBUTE_UNUSED;
2934 char *ignore ATTRIBUTE_UNUSED;
2935 {
2936 return 0;
2937 }
2938
2939 static float
2940 math_ceil (arg1, ignore)
2941 float arg1;
2942 float ignore ATTRIBUTE_UNUSED;
2943 {
2944 return (float) ceil (arg1);
2945 }
2946
2947 static float
2948 math_cvi (arg1, ignore)
2949 float arg1;
2950 float ignore ATTRIBUTE_UNUSED;
2951 {
2952 return (int) arg1;
2953 }
2954
2955 static float
2956 math_floor (arg1, ignore)
2957 float arg1;
2958 float ignore ATTRIBUTE_UNUSED;
2959 {
2960 return (float) floor (arg1);
2961 }
2962
2963 static float
2964 math_fmod (arg1, arg2)
2965 float arg1;
2966 float arg2;
2967 {
2968 return (int) arg1 % (int) arg2;
2969 }
2970
2971 static float
2972 math_int (arg1, ignore)
2973 float arg1;
2974 float ignore ATTRIBUTE_UNUSED;
2975 {
2976 return ((float) ((int) arg1)) == arg1;
2977 }
2978
2979 static float
2980 math_round (arg1, ignore)
2981 float arg1;
2982 float ignore ATTRIBUTE_UNUSED;
2983 {
2984 return arg1 > 0 ? (int) (arg1 + 0.5) : (int) (arg1 - 0.5);
2985 }
2986
2987 static float
2988 math_sgn (arg1, ignore)
2989 float arg1;
2990 float ignore ATTRIBUTE_UNUSED;
2991 {
2992 return (arg1 < 0) ? -1 : (arg1 ? 1 : 0);
2993 }
2994
2995 static float
2996 math_trunc (arg1, ignore)
2997 float arg1;
2998 float ignore ATTRIBUTE_UNUSED;
2999 {
3000 return (int) arg1;
3001 }
3002
3003 static float
3004 math_acos (arg1, ignore)
3005 float arg1;
3006 float ignore ATTRIBUTE_UNUSED;
3007 {
3008 return (float) acos (arg1);
3009 }
3010
3011 static float
3012 math_asin (arg1, ignore)
3013 float arg1;
3014 float ignore ATTRIBUTE_UNUSED;
3015 {
3016 return (float) asin (arg1);
3017 }
3018
3019 static float
3020 math_atan (arg1, ignore)
3021 float arg1;
3022 float ignore ATTRIBUTE_UNUSED;
3023 {
3024 return (float) atan (arg1);
3025 }
3026
3027 static float
3028 math_atan2 (arg1, arg2)
3029 float arg1;
3030 float arg2;
3031 {
3032 return (float) atan2 (arg1, arg2);
3033 }
3034
3035 static float
3036 math_cosh (arg1, ignore)
3037 float arg1;
3038 float ignore ATTRIBUTE_UNUSED;
3039 {
3040 return (float) cosh (arg1);
3041 }
3042
3043 static float
3044 math_cos (arg1, ignore)
3045 float arg1;
3046 float ignore ATTRIBUTE_UNUSED;
3047 {
3048 return (float) cos (arg1);
3049 }
3050
3051 static float
3052 math_cvf (arg1, ignore)
3053 float arg1;
3054 float ignore ATTRIBUTE_UNUSED;
3055 {
3056 return (float) arg1;
3057 }
3058
3059 static float
3060 math_exp (arg1, ignore)
3061 float arg1;
3062 float ignore ATTRIBUTE_UNUSED;
3063 {
3064 return (float) exp (arg1);
3065 }
3066
3067 static float
3068 math_fabs (arg1, ignore)
3069 float arg1;
3070 float ignore ATTRIBUTE_UNUSED;
3071 {
3072 return (float) fabs (arg1);
3073 }
3074
3075 /* expr1 * 2^expr2. */
3076
3077 static float
3078 math_ldexp (arg1, arg2)
3079 float arg1;
3080 float arg2;
3081 {
3082 return arg1 * (float) pow (2.0, arg2);
3083 }
3084
3085 static float
3086 math_log10 (arg1, ignore)
3087 float arg1;
3088 float ignore ATTRIBUTE_UNUSED;
3089 {
3090 return (float) log10 (arg1);
3091 }
3092
3093 static float
3094 math_log (arg1, ignore)
3095 float arg1;
3096 float ignore ATTRIBUTE_UNUSED;
3097 {
3098 return (float) log (arg1);
3099 }
3100
3101 static float
3102 math_max (arg1, arg2)
3103 float arg1;
3104 float arg2;
3105 {
3106 return (arg1 > arg2) ? arg1 : arg2;
3107 }
3108
3109 static float
3110 math_min (arg1, arg2)
3111 float arg1;
3112 float arg2;
3113 {
3114 return (arg1 < arg2) ? arg1 : arg2;
3115 }
3116
3117 static float
3118 math_pow (arg1, arg2)
3119 float arg1;
3120 float arg2;
3121 {
3122 return (float) pow (arg1, arg2);
3123 }
3124
3125 static float
3126 math_sin (arg1, ignore)
3127 float arg1;
3128 float ignore ATTRIBUTE_UNUSED;
3129 {
3130 return (float) sin (arg1);
3131 }
3132
3133 static float
3134 math_sinh (arg1, ignore)
3135 float arg1;
3136 float ignore ATTRIBUTE_UNUSED;
3137 {
3138 return (float) sinh (arg1);
3139 }
3140
3141 static float
3142 math_sqrt (arg1, ignore)
3143 float arg1;
3144 float ignore ATTRIBUTE_UNUSED;
3145 {
3146 return (float) sqrt (arg1);
3147 }
3148
3149 static float
3150 math_tan (arg1, ignore)
3151 float arg1;
3152 float ignore ATTRIBUTE_UNUSED;
3153 {
3154 return (float) tan (arg1);
3155 }
3156
3157 static float
3158 math_tanh (arg1, ignore)
3159 float arg1;
3160 float ignore ATTRIBUTE_UNUSED;
3161 {
3162 return (float) tanh (arg1);
3163 }
3164
3165 /* Built-in substitution symbol functions and math functions. */
3166 typedef struct
3167 {
3168 char *name;
3169 int (*proc) PARAMS ((char *, char *));
3170 int nargs;
3171 } subsym_proc_entry;
3172
3173 static const subsym_proc_entry subsym_procs[] =
3174 {
3175 /* Assembler built-in string substitution functions. */
3176 { "$symlen", subsym_symlen, 1, },
3177 { "$symcmp", subsym_symcmp, 2, },
3178 { "$firstch", subsym_firstch, 2, },
3179 { "$lastch", subsym_lastch, 2, },
3180 { "$isdefed", subsym_isdefed, 1, },
3181 { "$ismember", subsym_ismember, 2, },
3182 { "$iscons", subsym_iscons, 1, },
3183 { "$isname", subsym_isname, 1, },
3184 { "$isreg", subsym_isreg, 1, },
3185 { "$structsz", subsym_structsz, 1, },
3186 { "$structacc", subsym_structacc, 1, },
3187 { NULL, NULL, 0 },
3188 };
3189
3190 typedef struct
3191 {
3192 char *name;
3193 float (*proc) PARAMS ((float, float));
3194 int nargs;
3195 int int_return;
3196 } math_proc_entry;
3197
3198 static const math_proc_entry math_procs[] =
3199 {
3200 /* Integer-returning built-in math functions. */
3201 { "$cvi", math_cvi, 1, 1 },
3202 { "$int", math_int, 1, 1 },
3203 { "$sgn", math_sgn, 1, 1 },
3204
3205 /* Float-returning built-in math functions. */
3206 { "$acos", math_acos, 1, 0 },
3207 { "$asin", math_asin, 1, 0 },
3208 { "$atan", math_atan, 1, 0 },
3209 { "$atan2", math_atan2, 2, 0 },
3210 { "$ceil", math_ceil, 1, 0 },
3211 { "$cosh", math_cosh, 1, 0 },
3212 { "$cos", math_cos, 1, 0 },
3213 { "$cvf", math_cvf, 1, 0 },
3214 { "$exp", math_exp, 1, 0 },
3215 { "$fabs", math_fabs, 1, 0 },
3216 { "$floor", math_floor, 1, 0 },
3217 { "$fmod", math_fmod, 2, 0 },
3218 { "$ldexp", math_ldexp, 2, 0 },
3219 { "$log10", math_log10, 1, 0 },
3220 { "$log", math_log, 1, 0 },
3221 { "$max", math_max, 2, 0 },
3222 { "$min", math_min, 2, 0 },
3223 { "$pow", math_pow, 2, 0 },
3224 { "$round", math_round, 1, 0 },
3225 { "$sin", math_sin, 1, 0 },
3226 { "$sinh", math_sinh, 1, 0 },
3227 { "$sqrt", math_sqrt, 1, 0 },
3228 { "$tan", math_tan, 1, 0 },
3229 { "$tanh", math_tanh, 1, 0 },
3230 { "$trunc", math_trunc, 1, 0 },
3231 { NULL, NULL, 0, 0 },
3232 };
3233
3234 void
3235 md_begin ()
3236 {
3237 template *tm;
3238 symbol *sym;
3239 const subsym_proc_entry *subsym_proc;
3240 const math_proc_entry *math_proc;
3241 const char *hash_err;
3242 char **symname;
3243 char *TIC54X_DIR = getenv ("TIC54X_DIR");
3244 char *A_DIR = TIC54X_DIR ? TIC54X_DIR : getenv ("A_DIR");
3245
3246 local_label_id = 0;
3247
3248 /* Look for A_DIR and add it to the include list. */
3249 if (A_DIR != NULL)
3250 {
3251 char *tmp = xstrdup (A_DIR);
3252
3253 do
3254 {
3255 char *next = strchr (tmp, ';');
3256
3257 if (next)
3258 *next++ = '\0';
3259 add_include_dir (tmp);
3260 tmp = next;
3261 }
3262 while (tmp != NULL);
3263 }
3264
3265 op_hash = hash_new ();
3266 for (tm = (template *) tic54x_optab; tm->name; tm++)
3267 {
3268 if (hash_find (op_hash, tm->name))
3269 continue;
3270 hash_err = hash_insert (op_hash, tm->name, (char *) tm);
3271 if (hash_err)
3272 as_fatal ("Internal Error: Can't hash %s: %s",
3273 tm->name, hash_err);
3274 }
3275 parop_hash = hash_new ();
3276 for (tm = (template *) tic54x_paroptab; tm->name; tm++)
3277 {
3278 if (hash_find (parop_hash, tm->name))
3279 continue;
3280 hash_err = hash_insert (parop_hash, tm->name, (char *) tm);
3281 if (hash_err)
3282 as_fatal ("Internal Error: Can't hash %s: %s",
3283 tm->name, hash_err);
3284 }
3285 reg_hash = hash_new ();
3286 for (sym = (symbol *) regs; sym->name; sym++)
3287 {
3288 /* Add basic registers to the symbol table. */
3289 symbolS *symbolP = symbol_new (sym->name, absolute_section,
3290 (valueT) sym->value, &zero_address_frag);
3291 SF_SET_LOCAL (symbolP);
3292 symbol_table_insert (symbolP);
3293 hash_err = hash_insert (reg_hash, sym->name, (char *) sym);
3294 }
3295 for (sym = (symbol *) mmregs; sym->name; sym++)
3296 hash_err = hash_insert (reg_hash, sym->name, (char *) sym);
3297 mmreg_hash = hash_new ();
3298 for (sym = (symbol *) mmregs; sym->name; sym++)
3299 hash_err = hash_insert (mmreg_hash, sym->name, (char *) sym);
3300
3301 cc_hash = hash_new ();
3302 for (sym = (symbol *) condition_codes; sym->name; sym++)
3303 hash_err = hash_insert (cc_hash, sym->name, (char *) sym);
3304
3305 cc2_hash = hash_new ();
3306 for (sym = (symbol *) cc2_codes; sym->name; sym++)
3307 hash_err = hash_insert (cc2_hash, sym->name, (char *) sym);
3308
3309 cc3_hash = hash_new ();
3310 for (sym = (symbol *) cc3_codes; sym->name; sym++)
3311 hash_err = hash_insert (cc3_hash, sym->name, (char *) sym);
3312
3313 sbit_hash = hash_new ();
3314 for (sym = (symbol *) status_bits; sym->name; sym++)
3315 hash_err = hash_insert (sbit_hash, sym->name, (char *) sym);
3316
3317 misc_symbol_hash = hash_new ();
3318 for (symname = (char **) misc_symbols; *symname; symname++)
3319 hash_err = hash_insert (misc_symbol_hash, *symname, *symname);
3320
3321 /* Only the base substitution table and local label table are initialized;
3322 the others (for local macro substitution) get instantiated as needed. */
3323 local_label_hash[0] = hash_new ();
3324 subsym_hash[0] = hash_new ();
3325 for (subsym_proc = subsym_procs; subsym_proc->name; subsym_proc++)
3326 hash_err = hash_insert (subsym_hash[0], subsym_proc->name,
3327 (char *) subsym_proc);
3328
3329 math_hash = hash_new ();
3330 for (math_proc = math_procs; math_proc->name; math_proc++)
3331 {
3332 /* Insert into the main subsym hash for recognition; insert into
3333 the math hash to actually store information. */
3334 hash_err = hash_insert (subsym_hash[0], math_proc->name,
3335 (char *) math_proc);
3336 hash_err = hash_insert (math_hash, math_proc->name,
3337 (char *) math_proc);
3338 }
3339 subsym_recurse_hash = hash_new ();
3340 stag_hash = hash_new ();
3341 }
3342
3343 static int
3344 is_accumulator (operand)
3345 struct opstruct *operand;
3346 {
3347 return strcasecmp (operand->buf, "a") == 0
3348 || strcasecmp (operand->buf, "b") == 0;
3349 }
3350
3351 /* Return the number of operands found, or -1 on error, copying the
3352 operands into the given array and the accompanying expressions into
3353 the next array. */
3354
3355 static int
3356 get_operands (operands, line)
3357 struct opstruct operands[];
3358 char *line;
3359 {
3360 char *lptr = line;
3361 int numexp = 0;
3362 int expecting_operand = 0;
3363 int i;
3364
3365 while (numexp < MAX_OPERANDS && !is_end_of_line[(int) *lptr])
3366 {
3367 int paren_not_balanced = 0;
3368 char *op_start, *op_end;
3369
3370 while (*lptr && ISSPACE (*lptr))
3371 ++lptr;
3372 op_start = lptr;
3373 while (paren_not_balanced || *lptr != ',')
3374 {
3375 if (*lptr == '\0')
3376 {
3377 if (paren_not_balanced)
3378 {
3379 as_bad ("Unbalanced parenthesis in operand %d", numexp);
3380 return -1;
3381 }
3382 else
3383 break;
3384 }
3385 if (*lptr == '(')
3386 ++paren_not_balanced;
3387 else if (*lptr == ')')
3388 --paren_not_balanced;
3389 ++lptr;
3390 }
3391 op_end = lptr;
3392 if (op_end != op_start)
3393 {
3394 int len = op_end - op_start;
3395
3396 strncpy (operands[numexp].buf, op_start, len);
3397 operands[numexp].buf[len] = 0;
3398 /* Trim trailing spaces; while the preprocessor gets rid of most,
3399 there are weird usage patterns that can introduce them
3400 (i.e. using strings for macro args). */
3401 while (len > 0 && ISSPACE (operands[numexp].buf[len - 1]))
3402 operands[numexp].buf[--len] = 0;
3403 lptr = op_end;
3404 ++numexp;
3405 }
3406 else
3407 {
3408 if (expecting_operand || *lptr == ',')
3409 {
3410 as_bad ("Expecting operand after ','");
3411 return -1;
3412 }
3413 }
3414 if (*lptr == ',')
3415 {
3416 if (*++lptr == '\0')
3417 {
3418 as_bad ("Expecting operand after ','");
3419 return -1;
3420 }
3421 expecting_operand = 1;
3422 }
3423 }
3424
3425 while (*lptr && ISSPACE (*lptr++))
3426 ;
3427 if (!is_end_of_line[(int) *lptr])
3428 {
3429 as_bad ("Extra junk on line");
3430 return -1;
3431 }
3432
3433 /* OK, now parse them into expressions. */
3434 for (i = 0; i < numexp; i++)
3435 {
3436 memset (&operands[i].exp, 0, sizeof (operands[i].exp));
3437 if (operands[i].buf[0] == '#')
3438 {
3439 /* Immediate. */
3440 parse_expression (operands[i].buf + 1, &operands[i].exp);
3441 }
3442 else if (operands[i].buf[0] == '@')
3443 {
3444 /* Direct notation. */
3445 parse_expression (operands[i].buf + 1, &operands[i].exp);
3446 }
3447 else if (operands[i].buf[0] == '*')
3448 {
3449 /* Indirect. */
3450 char *paren = strchr (operands[i].buf, '(');
3451
3452 /* Allow immediate syntax in the inner expression. */
3453 if (paren && paren[1] == '#')
3454 *++paren = '(';
3455
3456 /* Pull out the lk expression or SP offset, if present. */
3457 if (paren != NULL)
3458 {
3459 int len = strlen (paren);
3460 char *end = paren + len;
3461 int c;
3462
3463 while (end[-1] != ')')
3464 if (--end <= paren)
3465 {
3466 as_bad (_("Badly formed address expression"));
3467 return -1;
3468 }
3469 c = *end;
3470 *end = '\0';
3471 parse_expression (paren, &operands[i].exp);
3472 *end = c;
3473 }
3474 else
3475 operands[i].exp.X_op = O_absent;
3476 }
3477 else
3478 parse_expression (operands[i].buf, &operands[i].exp);
3479 }
3480
3481 return numexp;
3482 }
3483
3484 /* Predicates for different operand types. */
3485
3486 static int
3487 is_immediate (operand)
3488 struct opstruct *operand;
3489 {
3490 return *operand->buf == '#';
3491 }
3492
3493 /* This is distinguished from immediate because some numbers must be constants
3494 and must *not* have the '#' prefix. */
3495
3496 static int
3497 is_absolute (operand)
3498 struct opstruct *operand;
3499 {
3500 return operand->exp.X_op == O_constant && !is_immediate (operand);
3501 }
3502
3503 /* Is this an indirect operand? */
3504
3505 static int
3506 is_indirect (operand)
3507 struct opstruct *operand;
3508 {
3509 return operand->buf[0] == '*';
3510 }
3511
3512 /* Is this a valid dual-memory operand? */
3513
3514 static int
3515 is_dual (operand)
3516 struct opstruct *operand;
3517 {
3518 if (is_indirect (operand) && strncasecmp (operand->buf, "*ar", 3) == 0)
3519 {
3520 char *tmp = operand->buf + 3;
3521 int arf;
3522 int valid_mod;
3523
3524 arf = *tmp++ - '0';
3525 /* Only allow *ARx, *ARx-, *ARx+, or *ARx+0%. */
3526 valid_mod = *tmp == '\0' ||
3527 strcasecmp (tmp, "-") == 0 ||
3528 strcasecmp (tmp, "+") == 0 ||
3529 strcasecmp (tmp, "+0%") == 0;
3530 return arf >= 2 && arf <= 5 && valid_mod;
3531 }
3532 return 0;
3533 }
3534
3535 static int
3536 is_mmreg (operand)
3537 struct opstruct *operand;
3538 {
3539 return (is_absolute (operand)
3540 || is_immediate (operand)
3541 || hash_find (mmreg_hash, operand->buf) != 0);
3542 }
3543
3544 static int
3545 is_type (operand, type)
3546 struct opstruct *operand;
3547 enum optype type;
3548 {
3549 switch (type)
3550 {
3551 case OP_None:
3552 return operand->buf[0] == 0;
3553 case OP_Xmem:
3554 case OP_Ymem:
3555 return is_dual (operand);
3556 case OP_Sind:
3557 return is_indirect (operand);
3558 case OP_xpmad_ms7:
3559 /* This one *must* be immediate. */
3560 return is_immediate (operand);
3561 case OP_xpmad:
3562 case OP_pmad:
3563 case OP_PA:
3564 case OP_dmad:
3565 case OP_Lmem:
3566 case OP_MMR:
3567 return 1;
3568 case OP_Smem:
3569 /* Address may be a numeric, indirect, or an expression. */
3570 return !is_immediate (operand);
3571 case OP_MMRY:
3572 case OP_MMRX:
3573 return is_mmreg (operand);
3574 case OP_SRC:
3575 case OP_SRC1:
3576 case OP_RND:
3577 case OP_DST:
3578 return is_accumulator (operand);
3579 case OP_B:
3580 return is_accumulator (operand) && TOUPPER (operand->buf[0]) == 'B';
3581 case OP_A:
3582 return is_accumulator (operand) && TOUPPER (operand->buf[0]) == 'A';
3583 case OP_ARX:
3584 return strncasecmp ("ar", operand->buf, 2) == 0
3585 && ISDIGIT (operand->buf[2]);
3586 case OP_SBIT:
3587 return hash_find (sbit_hash, operand->buf) != 0 || is_absolute (operand);
3588 case OP_CC:
3589 return hash_find (cc_hash, operand->buf) != 0;
3590 case OP_CC2:
3591 return hash_find (cc2_hash, operand->buf) != 0;
3592 case OP_CC3:
3593 return hash_find (cc3_hash, operand->buf) != 0
3594 || is_immediate (operand) || is_absolute (operand);
3595 case OP_16:
3596 return (is_immediate (operand) || is_absolute (operand))
3597 && operand->exp.X_add_number == 16;
3598 case OP_N:
3599 /* Allow st0 or st1 instead of a numeric. */
3600 return is_absolute (operand) || is_immediate (operand) ||
3601 strcasecmp ("st0", operand->buf) == 0 ||
3602 strcasecmp ("st1", operand->buf) == 0;
3603 case OP_12:
3604 case OP_123:
3605 return is_absolute (operand) || is_immediate (operand);
3606 case OP_SHFT:
3607 return (is_immediate (operand) || is_absolute (operand))
3608 && operand->exp.X_add_number >= 0 && operand->exp.X_add_number < 16;
3609 case OP_SHIFT:
3610 /* Let this one catch out-of-range values. */
3611 return (is_immediate (operand) || is_absolute (operand))
3612 && operand->exp.X_add_number != 16;
3613 case OP_BITC:
3614 case OP_031:
3615 case OP_k8:
3616 return is_absolute (operand) || is_immediate (operand);
3617 case OP_k8u:
3618 return is_immediate (operand)
3619 && operand->exp.X_op == O_constant
3620 && operand->exp.X_add_number >= 0
3621 && operand->exp.X_add_number < 256;
3622 case OP_lk:
3623 case OP_lku:
3624 /* Allow anything; assumes opcodes are ordered with Smem operands
3625 versions first. */
3626 return 1;
3627 case OP_k5:
3628 case OP_k3:
3629 case OP_k9:
3630 /* Just make sure it's an integer; check range later. */
3631 return is_immediate (operand);
3632 case OP_T:
3633 return strcasecmp ("t", operand->buf) == 0 ||
3634 strcasecmp ("treg", operand->buf) == 0;
3635 case OP_TS:
3636 return strcasecmp ("ts", operand->buf) == 0;
3637 case OP_ASM:
3638 return strcasecmp ("asm", operand->buf) == 0;
3639 case OP_TRN:
3640 return strcasecmp ("trn", operand->buf) == 0;
3641 case OP_DP:
3642 return strcasecmp ("dp", operand->buf) == 0;
3643 case OP_ARP:
3644 return strcasecmp ("arp", operand->buf) == 0;
3645 default:
3646 return 0;
3647 }
3648 }
3649
3650 static int
3651 operands_match (insn, operands, opcount, refoptype, minops, maxops)
3652 tic54x_insn *insn;
3653 struct opstruct *operands;
3654 int opcount;
3655 const enum optype *refoptype;
3656 int minops;
3657 int maxops;
3658 {
3659 int op = 0, refop = 0;
3660
3661 if (opcount == 0 && minops == 0)
3662 return 1;
3663
3664 while (op <= maxops && refop <= maxops)
3665 {
3666 while (!is_type (&operands[op], OPTYPE (refoptype[refop])))
3667 {
3668 /* Skip an optional template operand if it doesn't agree
3669 with the current operand. */
3670 if (refoptype[refop] & OPT)
3671 {
3672 ++refop;
3673 --maxops;
3674 if (refop > maxops)
3675 return 0;
3676 }
3677 else
3678 return 0;
3679 }
3680
3681 /* Save the actual operand type for later use. */
3682 operands[op].type = OPTYPE (refoptype[refop]);
3683 ++refop;
3684 ++op;
3685 /* Have we matched them all yet? */
3686 if (op == opcount)
3687 {
3688 while (op < maxops)
3689 {
3690 /* If a later operand is *not* optional, no match. */
3691 if ((refoptype[refop] & OPT) == 0)
3692 return 0;
3693 /* Flag any implicit default OP_DST operands so we know to add
3694 them explicitly when encoding the operand later. */
3695 if (OPTYPE (refoptype[refop]) == OP_DST)
3696 insn->using_default_dst = 1;
3697 ++refop;
3698 ++op;
3699 }
3700
3701 return 1;
3702 }
3703 }
3704
3705 return 0;
3706 }
3707
3708 /* 16-bit direct memory address
3709 Explicit dmad operands are always in last word of insn (usually second
3710 word, but bumped to third if lk addressing is used)
3711
3712 We allow *(dmad) notation because the TI assembler allows it.
3713
3714 XPC_CODE:
3715 0 for 16-bit addresses
3716 1 for full 23-bit addresses
3717 2 for the upper 7 bits of a 23-bit address (LDX). */
3718
3719 static int
3720 encode_dmad (insn, operand, xpc_code)
3721 tic54x_insn *insn;
3722 struct opstruct *operand;
3723 int xpc_code;
3724 {
3725 int op = 1 + insn->is_lkaddr;
3726
3727 /* Only allow *(dmad) expressions; all others are invalid. */
3728 if (is_indirect (operand) && operand->buf[strlen (operand->buf) - 1] != ')')
3729 {
3730 as_bad (_("Invalid dmad syntax '%s'"), operand->buf);
3731 return 0;
3732 }
3733
3734 insn->opcode[op].addr_expr = operand->exp;
3735
3736 if (insn->opcode[op].addr_expr.X_op == O_constant)
3737 {
3738 valueT value = insn->opcode[op].addr_expr.X_add_number;
3739
3740 if (xpc_code == 1)
3741 {
3742 insn->opcode[0].word &= 0xFF80;
3743 insn->opcode[0].word |= (value >> 16) & 0x7F;
3744 insn->opcode[1].word = value & 0xFFFF;
3745 }
3746 else if (xpc_code == 2)
3747 insn->opcode[op].word = (value >> 16) & 0xFFFF;
3748 else
3749 insn->opcode[op].word = value;
3750 }
3751 else
3752 {
3753 /* Do the fixup later; just store the expression. */
3754 insn->opcode[op].word = 0;
3755 insn->opcode[op].r_nchars = 2;
3756
3757 if (amode == c_mode)
3758 insn->opcode[op].r_type = BFD_RELOC_TIC54X_16_OF_23;
3759 else if (xpc_code == 1)
3760 {
3761 /* This relocation spans two words, so adjust accordingly. */
3762 insn->opcode[0].addr_expr = operand->exp;
3763 insn->opcode[0].r_type = BFD_RELOC_TIC54X_23;
3764 insn->opcode[0].r_nchars = 4;
3765 insn->opcode[0].unresolved = 1;
3766 /* It's really 2 words, but we want to stop encoding after the
3767 first, since we must encode both words at once. */
3768 insn->words = 1;
3769 }
3770 else if (xpc_code == 2)
3771 insn->opcode[op].r_type = BFD_RELOC_TIC54X_MS7_OF_23;
3772 else
3773 insn->opcode[op].r_type = BFD_RELOC_TIC54X_16_OF_23;
3774
3775 insn->opcode[op].unresolved = 1;
3776 }
3777
3778 return 1;
3779 }
3780
3781 /* 7-bit direct address encoding. */
3782
3783 static int
3784 encode_address (insn, operand)
3785 tic54x_insn *insn;
3786 struct opstruct *operand;
3787 {
3788 /* Assumes that dma addresses are *always* in word 0 of the opcode. */
3789 insn->opcode[0].addr_expr = operand->exp;
3790
3791 if (operand->exp.X_op == O_constant)
3792 insn->opcode[0].word |= (operand->exp.X_add_number & 0x7F);
3793 else
3794 {
3795 if (operand->exp.X_op == O_register)
3796 as_bad (_("Use the .mmregs directive to use memory-mapped register names such as '%s'"), operand->buf);
3797 /* Do the fixup later; just store the expression. */
3798 insn->opcode[0].r_nchars = 1;
3799 insn->opcode[0].r_type = BFD_RELOC_TIC54X_PARTLS7;
3800 insn->opcode[0].unresolved = 1;
3801 }
3802
3803 return 1;
3804 }
3805
3806 static int
3807 encode_indirect (insn, operand)
3808 tic54x_insn *insn;
3809 struct opstruct *operand;
3810 {
3811 int arf;
3812 int mod;
3813
3814 if (insn->is_lkaddr)
3815 {
3816 /* lk addresses always go in the second insn word. */
3817 mod = ((TOUPPER (operand->buf[1]) == 'A') ? 12 :
3818 (operand->buf[1] == '(') ? 15 :
3819 (strchr (operand->buf, '%') != NULL) ? 14 : 13);
3820 arf = ((mod == 12) ? operand->buf[3] - '0' :
3821 (mod == 15) ? 0 : operand->buf[4] - '0');
3822
3823 insn->opcode[1].addr_expr = operand->exp;
3824
3825 if (operand->exp.X_op == O_constant)
3826 insn->opcode[1].word = operand->exp.X_add_number;
3827 else
3828 {
3829 insn->opcode[1].word = 0;
3830 insn->opcode[1].r_nchars = 2;
3831 insn->opcode[1].r_type = BFD_RELOC_TIC54X_16_OF_23;
3832 insn->opcode[1].unresolved = 1;
3833 }
3834 }
3835 else if (strncasecmp (operand->buf, "*sp (", 4) == 0)
3836 {
3837 /* Stack offsets look the same as 7-bit direct addressing. */
3838 return encode_address (insn, operand);
3839 }
3840 else
3841 {
3842 arf = (TOUPPER (operand->buf[1]) == 'A' ?
3843 operand->buf[3] : operand->buf[4]) - '0';
3844
3845 if (operand->buf[1] == '+')
3846 {
3847 mod = 3; /* *+ARx */
3848 if (insn->tm->flags & FL_SMR)
3849 as_warn (_("Address mode *+ARx is write-only. "
3850 "Results of reading are undefined."));
3851 }
3852 else if (operand->buf[4] == '\0')
3853 mod = 0; /* *ARx */
3854 else if (operand->buf[5] == '\0')
3855 mod = (operand->buf[4] == '-' ? 1 : 2); /* *ARx+ / *ARx- */
3856 else if (operand->buf[6] == '\0')
3857 {
3858 if (operand->buf[5] == '0')
3859 mod = (operand->buf[4] == '-' ? 5 : 6); /* *ARx+0 / *ARx-0 */
3860 else
3861 mod = (operand->buf[4] == '-' ? 8 : 10);/* *ARx+% / *ARx-% */
3862 }
3863 else if (TOUPPER (operand->buf[6]) == 'B')
3864 mod = (operand->buf[4] == '-' ? 4 : 7); /* ARx+0B / *ARx-0B */
3865 else if (TOUPPER (operand->buf[6]) == '%')
3866 mod = (operand->buf[4] == '-' ? 9 : 11); /* ARx+0% / *ARx - 0% */
3867 else
3868 {
3869 as_bad (_("Unrecognized indirect address format \"%s\""),
3870 operand->buf);
3871 return 0;
3872 }
3873 }
3874
3875 insn->opcode[0].word |= 0x80 | (mod << 3) | arf;
3876
3877 return 1;
3878 }
3879
3880 static int
3881 encode_integer (insn, operand, which, min, max, mask)
3882 tic54x_insn *insn;
3883 struct opstruct *operand;
3884 int which;
3885 int min;
3886 int max;
3887 unsigned short mask;
3888 {
3889 long parse, integer;
3890
3891 insn->opcode[which].addr_expr = operand->exp;
3892
3893 if (operand->exp.X_op == O_constant)
3894 {
3895 parse = operand->exp.X_add_number;
3896 /* Hack -- fixup for 16-bit hex quantities that get converted positive
3897 instead of negative. */
3898 if ((parse & 0x8000) && min == -32768 && max == 32767)
3899 integer = (short) parse;
3900 else
3901 integer = parse;
3902
3903 if (integer >= min && integer <= max)
3904 {
3905 insn->opcode[which].word |= (integer & mask);
3906 return 1;
3907 }
3908 as_bad (_("Operand '%s' out of range (%d <= x <= %d)"),
3909 operand->buf, min, max);
3910 }
3911 else
3912 {
3913 if (insn->opcode[which].addr_expr.X_op == O_constant)
3914 {
3915 insn->opcode[which].word |=
3916 insn->opcode[which].addr_expr.X_add_number & mask;
3917 }
3918 else
3919 {
3920 /* Do the fixup later; just store the expression. */
3921 bfd_reloc_code_real_type rtype =
3922 (mask == 0x1FF ? BFD_RELOC_TIC54X_PARTMS9 :
3923 mask == 0xFFFF ? BFD_RELOC_TIC54X_16_OF_23 :
3924 mask == 0x7F ? BFD_RELOC_TIC54X_PARTLS7 : BFD_RELOC_8);
3925 int size = (mask == 0x1FF || mask == 0xFFFF) ? 2 : 1;
3926
3927 if (rtype == BFD_RELOC_8)
3928 as_bad (_("Error in relocation handling"));
3929
3930 insn->opcode[which].r_nchars = size;
3931 insn->opcode[which].r_type = rtype;
3932 insn->opcode[which].unresolved = 1;
3933 }
3934
3935 return 1;
3936 }
3937
3938 return 0;
3939 }
3940
3941 static int
3942 encode_condition (insn, operand)
3943 tic54x_insn *insn;
3944 struct opstruct *operand;
3945 {
3946 symbol *cc = (symbol *) hash_find (cc_hash, operand->buf);
3947 if (!cc)
3948 {
3949 as_bad (_("Unrecognized condition code \"%s\""), operand->buf);
3950 return 0;
3951 }
3952 #define CC_GROUP 0x40
3953 #define CC_ACC 0x08
3954 #define CATG_A1 0x07
3955 #define CATG_B1 0x30
3956 #define CATG_A2 0x30
3957 #define CATG_B2 0x0C
3958 #define CATG_C2 0x03
3959 /* Disallow group 1 conditions mixed with group 2 conditions
3960 if group 1, allow only one category A and one category B
3961 if group 2, allow only one each of category A, B, and C. */
3962 if (((insn->opcode[0].word & 0xFF) != 0))
3963 {
3964 if ((insn->opcode[0].word & CC_GROUP) != (cc->value & CC_GROUP))
3965 {
3966 as_bad (_("Condition \"%s\" does not match preceding group"),
3967 operand->buf);
3968 return 0;
3969 }
3970 if (insn->opcode[0].word & CC_GROUP)
3971 {
3972 if ((insn->opcode[0].word & CC_ACC) != (cc->value & CC_ACC))
3973 {
3974 as_bad (_("Condition \"%s\" uses a different accumulator from "
3975 "a preceding condition"),
3976 operand->buf);
3977 return 0;
3978 }
3979 if ((insn->opcode[0].word & CATG_A1) && (cc->value & CATG_A1))
3980 {
3981 as_bad (_("Only one comparison conditional allowed"));
3982 return 0;
3983 }
3984 if ((insn->opcode[0].word & CATG_B1) && (cc->value & CATG_B1))
3985 {
3986 as_bad (_("Only one overflow conditional allowed"));
3987 return 0;
3988 }
3989 }
3990 else if ( ((insn->opcode[0].word & CATG_A2) && (cc->value & CATG_A2))
3991 || ((insn->opcode[0].word & CATG_B2) && (cc->value & CATG_B2))
3992 || ((insn->opcode[0].word & CATG_C2) && (cc->value & CATG_C2)))
3993 {
3994 as_bad (_("Duplicate %s conditional"), operand->buf);
3995 return 0;
3996 }
3997 }
3998
3999 insn->opcode[0].word |= cc->value;
4000 return 1;
4001 }
4002
4003 static int
4004 encode_cc3 (insn, operand)
4005 tic54x_insn *insn;
4006 struct opstruct *operand;
4007 {
4008 symbol *cc3 = (symbol *) hash_find (cc3_hash, operand->buf);
4009 int value = cc3 ? cc3->value : operand->exp.X_add_number << 8;
4010
4011 if ((value & 0x0300) != value)
4012 {
4013 as_bad (_("Unrecognized condition code \"%s\""), operand->buf);
4014 return 0;
4015 }
4016 insn->opcode[0].word |= value;
4017 return 1;
4018 }
4019
4020 static int
4021 encode_arx (insn, operand)
4022 tic54x_insn *insn;
4023 struct opstruct *operand;
4024 {
4025 int arf = strlen (operand->buf) >= 3 ? operand->buf[2] - '0' : -1;
4026
4027 if (strncasecmp ("ar", operand->buf, 2) || arf < 0 || arf > 7)
4028 {
4029 as_bad (_("Invalid auxiliary register (use AR0-AR7)"));
4030 return 0;
4031 }
4032 insn->opcode[0].word |= arf;
4033 return 1;
4034 }
4035
4036 static int
4037 encode_cc2 (insn, operand)
4038 tic54x_insn *insn;
4039 struct opstruct *operand;
4040 {
4041 symbol *cc2 = (symbol *) hash_find (cc2_hash, operand->buf);
4042
4043 if (!cc2)
4044 {
4045 as_bad (_("Unrecognized condition code \"%s\""), operand->buf);
4046 return 0;
4047 }
4048 insn->opcode[0].word |= cc2->value;
4049 return 1;
4050 }
4051
4052 static int
4053 encode_operand (insn, type, operand)
4054 tic54x_insn *insn;
4055 enum optype type;
4056 struct opstruct *operand;
4057 {
4058 int ext = (insn->tm->flags & FL_EXT) != 0;
4059
4060 if (type == OP_MMR && operand->exp.X_op != O_constant)
4061 {
4062 /* Disallow long-constant addressing for memory-mapped addressing. */
4063 if (insn->is_lkaddr)
4064 {
4065 as_bad (_("lk addressing modes are invalid for memory-mapped "
4066 "register addressing"));
4067 return 0;
4068 }
4069 type = OP_Smem;
4070 /* Warn about *+ARx when used with MMR operands. */
4071 if (strncasecmp (operand->buf, "*+ar", 4) == 0)
4072 {
4073 as_warn (_("Address mode *+ARx is not allowed in memory-mapped "
4074 "register addressing. Resulting behavior is "
4075 "undefined."));
4076 }
4077 }
4078
4079 switch (type)
4080 {
4081 case OP_None:
4082 return 1;
4083 case OP_dmad:
4084 /* 16-bit immediate value. */
4085 return encode_dmad (insn, operand, 0);
4086 case OP_SRC:
4087 if (TOUPPER (*operand->buf) == 'B')
4088 {
4089 insn->opcode[ext ? (1 + insn->is_lkaddr) : 0].word |= (1 << 9);
4090 if (insn->using_default_dst)
4091 insn->opcode[ext ? (1 + insn->is_lkaddr) : 0].word |= (1 << 8);
4092 }
4093 return 1;
4094 case OP_RND:
4095 /* Make sure this agrees with the OP_DST operand. */
4096 if (!((TOUPPER (operand->buf[0]) == 'B') ^
4097 ((insn->opcode[0].word & (1 << 8)) != 0)))
4098 {
4099 as_bad (_("Destination accumulator for each part of this parallel "
4100 "instruction must be different"));
4101 return 0;
4102 }
4103 return 1;
4104 case OP_SRC1:
4105 case OP_DST:
4106 if (TOUPPER (operand->buf[0]) == 'B')
4107 insn->opcode[ext ? (1 + insn->is_lkaddr) : 0].word |= (1 << 8);
4108 return 1;
4109 case OP_Xmem:
4110 case OP_Ymem:
4111 {
4112 int mod = (operand->buf[4] == '\0' ? 0 : /* *arx */
4113 operand->buf[4] == '-' ? 1 : /* *arx- */
4114 operand->buf[5] == '\0' ? 2 : 3); /* *arx+, *arx+0% */
4115 int arf = operand->buf[3] - '0' - 2;
4116 int code = (mod << 2) | arf;
4117 insn->opcode[0].word |= (code << (type == OP_Xmem ? 4 : 0));
4118 return 1;
4119 }
4120 case OP_Lmem:
4121 case OP_Smem:
4122 if (!is_indirect (operand))
4123 return encode_address (insn, operand);
4124 /* Fall through. */
4125 case OP_Sind:
4126 return encode_indirect (insn, operand);
4127 case OP_xpmad_ms7:
4128 return encode_dmad (insn, operand, 2);
4129 case OP_xpmad:
4130 return encode_dmad (insn, operand, 1);
4131 case OP_PA:
4132 case OP_pmad:
4133 return encode_dmad (insn, operand, 0);
4134 case OP_ARX:
4135 return encode_arx (insn, operand);
4136 case OP_MMRX:
4137 case OP_MMRY:
4138 case OP_MMR:
4139 {
4140 int value = operand->exp.X_add_number;
4141
4142 if (type == OP_MMR)
4143 insn->opcode[0].word |= value;
4144 else
4145 {
4146 if (value < 16 || value > 24)
4147 {
4148 as_bad (_("Memory mapped register \"%s\" out of range"),
4149 operand->buf);
4150 return 0;
4151 }
4152 if (type == OP_MMRX)
4153 insn->opcode[0].word |= (value - 16) << 4;
4154 else
4155 insn->opcode[0].word |= (value - 16);
4156 }
4157 return 1;
4158 }
4159 case OP_B:
4160 case OP_A:
4161 return 1;
4162 case OP_SHFT:
4163 return encode_integer (insn, operand, ext + insn->is_lkaddr,
4164 0, 15, 0xF);
4165 case OP_SHIFT:
4166 return encode_integer (insn, operand, ext + insn->is_lkaddr,
4167 -16, 15, 0x1F);
4168 case OP_lk:
4169 return encode_integer (insn, operand, 1 + insn->is_lkaddr,
4170 -32768, 32767, 0xFFFF);
4171 case OP_CC:
4172 return encode_condition (insn, operand);
4173 case OP_CC2:
4174 return encode_cc2 (insn, operand);
4175 case OP_CC3:
4176 return encode_cc3 (insn, operand);
4177 case OP_BITC:
4178 return encode_integer (insn, operand, 0, 0, 15, 0xF);
4179 case OP_k8:
4180 return encode_integer (insn, operand, 0, -128, 127, 0xFF);
4181 case OP_123:
4182 {
4183 int value = operand->exp.X_add_number;
4184 int code;
4185 if (value < 1 || value > 3)
4186 {
4187 as_bad (_("Invalid operand (use 1, 2, or 3)"));
4188 return 0;
4189 }
4190 code = value == 1 ? 0 : value == 2 ? 0x2 : 0x1;
4191 insn->opcode[0].word |= (code << 8);
4192 return 1;
4193 }
4194 case OP_031:
4195 return encode_integer (insn, operand, 0, 0, 31, 0x1F);
4196 case OP_k8u:
4197 return encode_integer (insn, operand, 0, 0, 255, 0xFF);
4198 case OP_lku:
4199 return encode_integer (insn, operand, 1 + insn->is_lkaddr,
4200 0, 65535, 0xFFFF);
4201 case OP_SBIT:
4202 {
4203 symbol *sbit = (symbol *) hash_find (sbit_hash, operand->buf);
4204 int value = is_absolute (operand) ?
4205 operand->exp.X_add_number : (sbit ? sbit->value : -1);
4206 int reg = 0;
4207
4208 if (insn->opcount == 1)
4209 {
4210 if (!sbit)
4211 {
4212 as_bad (_("A status register or status bit name is required"));
4213 return 0;
4214 }
4215 /* Guess the register based on the status bit; "ovb" is the last
4216 status bit defined for st0. */
4217 if (sbit > (symbol *) hash_find (sbit_hash, "ovb"))
4218 reg = 1;
4219 }
4220 if (value == -1)
4221 {
4222 as_bad (_("Unrecognized status bit \"%s\""), operand->buf);
4223 return 0;
4224 }
4225 insn->opcode[0].word |= value;
4226 insn->opcode[0].word |= (reg << 9);
4227 return 1;
4228 }
4229 case OP_N:
4230 if (strcasecmp (operand->buf, "st0") == 0
4231 || strcasecmp (operand->buf, "st1") == 0)
4232 {
4233 insn->opcode[0].word |=
4234 ((unsigned short) (operand->buf[2] - '0')) << 9;
4235 return 1;
4236 }
4237 else if (operand->exp.X_op == O_constant
4238 && (operand->exp.X_add_number == 0
4239 || operand->exp.X_add_number == 1))
4240 {
4241 insn->opcode[0].word |=
4242 ((unsigned short) (operand->exp.X_add_number)) << 9;
4243 return 1;
4244 }
4245 as_bad (_("Invalid status register \"%s\""), operand->buf);
4246 return 0;
4247 case OP_k5:
4248 return encode_integer (insn, operand, 0, -16, 15, 0x1F);
4249 case OP_k3:
4250 return encode_integer (insn, operand, 0, 0, 7, 0x7);
4251 case OP_k9:
4252 return encode_integer (insn, operand, 0, 0, 0x1FF, 0x1FF);
4253 case OP_12:
4254 if (operand->exp.X_add_number != 1
4255 && operand->exp.X_add_number != 2)
4256 {
4257 as_bad (_("Operand \"%s\" out of range (use 1 or 2)"), operand->buf);
4258 return 0;
4259 }
4260 insn->opcode[0].word |= (operand->exp.X_add_number - 1) << 9;
4261 return 1;
4262 case OP_16:
4263 case OP_T:
4264 case OP_TS:
4265 case OP_ASM:
4266 case OP_TRN:
4267 case OP_DP:
4268 case OP_ARP:
4269 /* No encoding necessary. */
4270 return 1;
4271 default:
4272 return 0;
4273 }
4274
4275 return 1;
4276 }
4277
4278 static void
4279 emit_insn (insn)
4280 tic54x_insn *insn;
4281 {
4282 int i;
4283 flagword oldflags = bfd_get_section_flags (stdoutput, now_seg);
4284 flagword flags = oldflags | SEC_CODE;
4285
4286 if (! bfd_set_section_flags (stdoutput, now_seg, flags))
4287 as_warn (_("error setting flags for \"%s\": %s"),
4288 bfd_section_name (stdoutput, now_seg),
4289 bfd_errmsg (bfd_get_error ()));
4290
4291 for (i = 0; i < insn->words; i++)
4292 {
4293 int size = (insn->opcode[i].unresolved
4294 && insn->opcode[i].r_type == BFD_RELOC_TIC54X_23) ? 4 : 2;
4295 char *p = frag_more (size);
4296
4297 if (size == 2)
4298 md_number_to_chars (p, (valueT) insn->opcode[i].word, 2);
4299 else
4300 md_number_to_chars (p, (valueT) insn->opcode[i].word << 16, 4);
4301
4302 if (insn->opcode[i].unresolved)
4303 fix_new_exp (frag_now, p - frag_now->fr_literal,
4304 insn->opcode[i].r_nchars, &insn->opcode[i].addr_expr,
4305 FALSE, insn->opcode[i].r_type);
4306 }
4307 }
4308
4309 /* Convert the operand strings into appropriate opcode values
4310 return the total number of words used by the instruction. */
4311
4312 static int
4313 build_insn (insn)
4314 tic54x_insn *insn;
4315 {
4316 int i;
4317
4318 /* Only non-parallel instructions support lk addressing. */
4319 if (!(insn->tm->flags & FL_PAR))
4320 {
4321 for (i = 0; i < insn->opcount; i++)
4322 {
4323 if ((OPTYPE (insn->operands[i].type) == OP_Smem
4324 || OPTYPE (insn->operands[i].type) == OP_Lmem
4325 || OPTYPE (insn->operands[i].type) == OP_Sind)
4326 && strchr (insn->operands[i].buf, '(')
4327 /* Don't mistake stack-relative addressing for lk addressing. */
4328 && strncasecmp (insn->operands[i].buf, "*sp (", 4) != 0)
4329 {
4330 insn->is_lkaddr = 1;
4331 insn->lkoperand = i;
4332 break;
4333 }
4334 }
4335 }
4336 insn->words = insn->tm->words + insn->is_lkaddr;
4337
4338 insn->opcode[0].word = insn->tm->opcode;
4339 if (insn->tm->flags & FL_EXT)
4340 insn->opcode[1 + insn->is_lkaddr].word = insn->tm->opcode2;
4341
4342 for (i = 0; i < insn->opcount; i++)
4343 {
4344 enum optype type = insn->operands[i].type;
4345
4346 if (!encode_operand (insn, type, &insn->operands[i]))
4347 return 0;
4348 }
4349 if (insn->tm->flags & FL_PAR)
4350 for (i = 0; i < insn->paropcount; i++)
4351 {
4352 enum optype partype = insn->paroperands[i].type;
4353
4354 if (!encode_operand (insn, partype, &insn->paroperands[i]))
4355 return 0;
4356 }
4357
4358 emit_insn (insn);
4359
4360 return insn->words;
4361 }
4362
4363 static int
4364 optimize_insn (insn)
4365 tic54x_insn *insn;
4366 {
4367 /* Optimize some instructions, helping out the brain-dead programmer. */
4368 #define is_zero(op) ((op).exp.X_op == O_constant && (op).exp.X_add_number == 0)
4369 if (strcasecmp (insn->tm->name, "add") == 0)
4370 {
4371 if (insn->opcount > 1
4372 && is_accumulator (&insn->operands[insn->opcount - 2])
4373 && is_accumulator (&insn->operands[insn->opcount - 1])
4374 && strcasecmp (insn->operands[insn->opcount - 2].buf,
4375 insn->operands[insn->opcount - 1].buf) == 0)
4376 {
4377 --insn->opcount;
4378 insn->using_default_dst = 1;
4379 return 1;
4380 }
4381
4382 /* Try to collapse if Xmem and shift count is zero. */
4383 if ((OPTYPE (insn->tm->operand_types[0]) == OP_Xmem
4384 && OPTYPE (insn->tm->operand_types[1]) == OP_SHFT
4385 && is_zero (insn->operands[1]))
4386 /* Or if Smem, shift is zero or absent, and SRC == DST. */
4387 || (OPTYPE (insn->tm->operand_types[0]) == OP_Smem
4388 && OPTYPE (insn->tm->operand_types[1]) == OP_SHIFT
4389 && is_type (&insn->operands[1], OP_SHIFT)
4390 && is_zero (insn->operands[1]) && insn->opcount == 3))
4391 {
4392 insn->operands[1] = insn->operands[2];
4393 insn->opcount = 2;
4394 return 1;
4395 }
4396 }
4397 else if (strcasecmp (insn->tm->name, "ld") == 0)
4398 {
4399 if (insn->opcount == 3 && insn->operands[0].type != OP_SRC)
4400 {
4401 if ((OPTYPE (insn->tm->operand_types[1]) == OP_SHIFT
4402 || OPTYPE (insn->tm->operand_types[1]) == OP_SHFT)
4403 && is_zero (insn->operands[1])
4404 && (OPTYPE (insn->tm->operand_types[0]) != OP_lk
4405 || (insn->operands[0].exp.X_op == O_constant
4406 && insn->operands[0].exp.X_add_number <= 255
4407 && insn->operands[0].exp.X_add_number >= 0)))
4408 {
4409 insn->operands[1] = insn->operands[2];
4410 insn->opcount = 2;
4411 return 1;
4412 }
4413 }
4414 }
4415 else if (strcasecmp (insn->tm->name, "sth") == 0
4416 || strcasecmp (insn->tm->name, "stl") == 0)
4417 {
4418 if ((OPTYPE (insn->tm->operand_types[1]) == OP_SHIFT
4419 || OPTYPE (insn->tm->operand_types[1]) == OP_SHFT)
4420 && is_zero (insn->operands[1]))
4421 {
4422 insn->operands[1] = insn->operands[2];
4423 insn->opcount = 2;
4424 return 1;
4425 }
4426 }
4427 else if (strcasecmp (insn->tm->name, "sub") == 0)
4428 {
4429 if (insn->opcount > 1
4430 && is_accumulator (&insn->operands[insn->opcount - 2])
4431 && is_accumulator (&insn->operands[insn->opcount - 1])
4432 && strcasecmp (insn->operands[insn->opcount - 2].buf,
4433 insn->operands[insn->opcount - 1].buf) == 0)
4434 {
4435 --insn->opcount;
4436 insn->using_default_dst = 1;
4437 return 1;
4438 }
4439
4440 if ( ((OPTYPE (insn->tm->operand_types[0]) == OP_Smem
4441 && OPTYPE (insn->tm->operand_types[1]) == OP_SHIFT)
4442 || (OPTYPE (insn->tm->operand_types[0]) == OP_Xmem
4443 && OPTYPE (insn->tm->operand_types[1]) == OP_SHFT))
4444 && is_zero (insn->operands[1])
4445 && insn->opcount == 3)
4446 {
4447 insn->operands[1] = insn->operands[2];
4448 insn->opcount = 2;
4449 return 1;
4450 }
4451 }
4452 return 0;
4453 }
4454
4455 /* Find a matching template if possible, and get the operand strings. */
4456
4457 static int
4458 tic54x_parse_insn (insn, line)
4459 tic54x_insn *insn;
4460 char *line;
4461 {
4462 insn->tm = (template *) hash_find (op_hash, insn->mnemonic);
4463 if (!insn->tm)
4464 {
4465 as_bad (_("Unrecognized instruction \"%s\""), insn->mnemonic);
4466 return 0;
4467 }
4468
4469 insn->opcount = get_operands (insn->operands, line);
4470 if (insn->opcount < 0)
4471 return 0;
4472
4473 /* Check each variation of operands for this mnemonic. */
4474 while (insn->tm->name && strcasecmp (insn->tm->name, insn->mnemonic) == 0)
4475 {
4476 if (insn->opcount >= insn->tm->minops
4477 && insn->opcount <= insn->tm->maxops
4478 && operands_match (insn, &insn->operands[0], insn->opcount,
4479 insn->tm->operand_types,
4480 insn->tm->minops, insn->tm->maxops))
4481 {
4482 /* SUCCESS! now try some optimizations. */
4483 if (optimize_insn (insn))
4484 {
4485 insn->tm = (template *) hash_find (op_hash,
4486 insn->mnemonic);
4487 continue;
4488 }
4489
4490 return 1;
4491 }
4492 ++(insn->tm);
4493 }
4494 as_bad (_("Unrecognized operand list '%s' for instruction '%s'"),
4495 line, insn->mnemonic);
4496 return 0;
4497 }
4498
4499 /* We set this in start_line_hook, 'cause if we do a line replacement, we
4500 won't be able to see the next line. */
4501 static int parallel_on_next_line_hint = 0;
4502
4503 /* See if this is part of a parallel instruction
4504 Look for a subsequent line starting with "||". */
4505
4506 static int
4507 next_line_shows_parallel (next_line)
4508 char *next_line;
4509 {
4510 /* Look for the second half. */
4511 while (ISSPACE (*next_line))
4512 ++next_line;
4513
4514 return (next_line[0] == PARALLEL_SEPARATOR
4515 && next_line[1] == PARALLEL_SEPARATOR);
4516 }
4517
4518 static int
4519 tic54x_parse_parallel_insn_firstline (insn, line)
4520 tic54x_insn *insn;
4521 char *line;
4522 {
4523 insn->tm = (template *) hash_find (parop_hash, insn->mnemonic);
4524 if (!insn->tm)
4525 {
4526 as_bad (_("Unrecognized parallel instruction \"%s\""),
4527 insn->mnemonic);
4528 return 0;
4529 }
4530
4531 while (insn->tm->name && strcasecmp (insn->tm->name,
4532 insn->mnemonic) == 0)
4533 {
4534 insn->opcount = get_operands (insn->operands, line);
4535 if (insn->opcount < 0)
4536 return 0;
4537 if (insn->opcount == 2
4538 && operands_match (insn, &insn->operands[0], insn->opcount,
4539 insn->tm->operand_types, 2, 2))
4540 {
4541 return 1;
4542 }
4543 ++(insn->tm);
4544 }
4545 /* Didn't find a matching parallel; try for a normal insn. */
4546 return 0;
4547 }
4548
4549 /* Parse the second line of a two-line parallel instruction. */
4550
4551 static int
4552 tic54x_parse_parallel_insn_lastline (insn, line)
4553 tic54x_insn *insn;
4554 char *line;
4555 {
4556 int valid_mnemonic = 0;
4557
4558 insn->paropcount = get_operands (insn->paroperands, line);
4559 while (insn->tm->name && strcasecmp (insn->tm->name,
4560 insn->mnemonic) == 0)
4561 {
4562 if (strcasecmp (insn->tm->parname, insn->parmnemonic) == 0)
4563 {
4564 valid_mnemonic = 1;
4565
4566 if (insn->paropcount >= insn->tm->minops
4567 && insn->paropcount <= insn->tm->maxops
4568 && operands_match (insn, insn->paroperands,
4569 insn->paropcount,
4570 insn->tm->paroperand_types,
4571 insn->tm->minops, insn->tm->maxops))
4572 return 1;
4573 }
4574 ++(insn->tm);
4575 }
4576 if (valid_mnemonic)
4577 as_bad (_("Invalid operand (s) for parallel instruction \"%s\""),
4578 insn->parmnemonic);
4579 else
4580 as_bad (_("Unrecognized parallel instruction combination \"%s || %s\""),
4581 insn->mnemonic, insn->parmnemonic);
4582
4583 return 0;
4584 }
4585
4586 /* If quotes found, return copy of line up to closing quote;
4587 otherwise up until terminator.
4588 If it's a string, pass as-is; otherwise attempt substitution symbol
4589 replacement on the value. */
4590
4591 static char *
4592 subsym_get_arg (line, terminators, str, nosub)
4593 char *line;
4594 char *terminators;
4595 char **str;
4596 int nosub;
4597 {
4598 char *ptr = line;
4599 char *endp;
4600 int is_string = *line == '"';
4601 int is_char = ISDIGIT (*line);
4602
4603 if (is_char)
4604 {
4605 while (ISDIGIT (*ptr))
4606 ++ptr;
4607 endp = ptr;
4608 *str = xmalloc (ptr - line + 1);
4609 strncpy (*str, line, ptr - line);
4610 (*str)[ptr - line] = 0;
4611 }
4612 else if (is_string)
4613 {
4614 char *savedp = input_line_pointer;
4615 int len;
4616
4617 input_line_pointer = ptr;
4618 *str = demand_copy_C_string (&len);
4619 endp = input_line_pointer;
4620 input_line_pointer = savedp;
4621
4622 /* Do forced substitutions if requested. */
4623 if (!nosub && **str == ':')
4624 *str = subsym_substitute (*str, 1);
4625 }
4626 else
4627 {
4628 char *term = terminators;
4629 char *value = NULL;
4630
4631 while (*ptr && *ptr != *term)
4632 {
4633 if (!*term)
4634 {
4635 term = terminators;
4636 ++ptr;
4637 }
4638 else
4639 ++term;
4640 }
4641 endp = ptr;
4642 *str = xmalloc (ptr - line + 1);
4643 strncpy (*str, line, ptr - line);
4644 (*str)[ptr - line] = 0;
4645 /* Do simple substitution, if available. */
4646 if (!nosub && (value = subsym_lookup (*str, macro_level)) != NULL)
4647 *str = value;
4648 }
4649
4650 return endp;
4651 }
4652
4653 /* Replace the given substitution string.
4654 We start at the innermost macro level, so that existing locals remain local
4655 Note: we're treating macro args identically to .var's; I don't know if
4656 that's compatible w/TI's assembler. */
4657
4658 static void
4659 subsym_create_or_replace (name, value)
4660 char *name;
4661 char *value;
4662 {
4663 int i;
4664
4665 for (i = macro_level; i > 0; i--)
4666 {
4667 if (hash_find (subsym_hash[i], name))
4668 {
4669 hash_replace (subsym_hash[i], name, value);
4670 return;
4671 }
4672 }
4673 if (hash_find (subsym_hash[0], name))
4674 hash_replace (subsym_hash[0], name, value);
4675 else
4676 hash_insert (subsym_hash[0], name, value);
4677 }
4678
4679 /* Look up the substitution string replacement for the given symbol.
4680 Start with the innermost macro substitution table given and work
4681 outwards. */
4682
4683 static char *
4684 subsym_lookup (name, nest_level)
4685 char *name;
4686 int nest_level;
4687 {
4688 char *value = hash_find (subsym_hash[nest_level], name);
4689
4690 if (value || nest_level == 0)
4691 return value;
4692
4693 return subsym_lookup (name, nest_level - 1);
4694 }
4695
4696 /* Do substitution-symbol replacement on the given line (recursively).
4697 return the argument if no substitution was done
4698
4699 Also look for built-in functions ($func (arg)) and local labels.
4700
4701 If FORCED is set, look for forced substitutions of the form ':SYMBOL:'. */
4702
4703 static char *
4704 subsym_substitute (line, forced)
4705 char * line;
4706 int forced;
4707 {
4708 /* For each apparent symbol, see if it's a substitution symbol, and if so,
4709 replace it in the input. */
4710 char *replacement; /* current replacement for LINE. */
4711 char *head; /* Start of line. */
4712 char *ptr; /* Current examination point. */
4713 int changed = 0; /* Did we make a substitution? */
4714 int eval_line = 0; /* Is this line a .eval/.asg statement? */
4715 int eval_symbol = 0; /* Are we in the middle of the symbol for
4716 .eval/.asg? */
4717 char *eval_end = NULL;
4718 int recurse = 1;
4719 int line_conditional = 0;
4720 char *tmp;
4721
4722 /* Work with a copy of the input line. */
4723 replacement = xmalloc (strlen (line) + 1);
4724 strcpy (replacement, line);
4725
4726 ptr = head = replacement;
4727
4728 /* Flag lines where we might need to replace a single '=' with two;
4729 GAS uses single '=' to assign macro args values, and possibly other
4730 places, so limit what we replace. */
4731 if (strstr (line, ".if")
4732 || strstr (line, ".elseif")
4733 || strstr (line, ".break"))
4734 line_conditional = 1;
4735
4736 /* Watch out for .eval, so that we avoid doing substitution on the
4737 symbol being assigned a value. */
4738 if (strstr (line, ".eval") || strstr (line, ".asg"))
4739 eval_line = 1;
4740
4741 /* If it's a macro definition, don't do substitution on the argument
4742 names. */
4743 if (strstr (line, ".macro"))
4744 return line;
4745
4746 while (!is_end_of_line[(int) *ptr])
4747 {
4748 int current_char = *ptr;
4749
4750 /* Need to update this since LINE may have been modified. */
4751 if (eval_line)
4752 eval_end = strrchr (ptr, ',');
4753
4754 /* Replace triple double quotes with bounding quote/escapes. */
4755 if (current_char == '"' && ptr[1] == '"' && ptr[2] == '"')
4756 {
4757 ptr[1] = '\\';
4758 tmp = strstr (ptr + 2, "\"\"\"");
4759 if (tmp)
4760 tmp[0] = '\\';
4761 changed = 1;
4762 }
4763
4764 /* Replace a single '=' with a '==';
4765 for compatibility with older code only. */
4766 if (line_conditional && current_char == '=')
4767 {
4768 if (ptr[1] == '=')
4769 {
4770 ptr += 2;
4771 continue;
4772 }
4773 *ptr++ = '\0';
4774 tmp = xmalloc (strlen (head) + 2 + strlen (ptr) + 1);
4775 sprintf (tmp, "%s==%s", head, ptr);
4776 /* Continue examining after the '=='. */
4777 ptr = tmp + strlen (head) + 2;
4778 free (replacement);
4779 head = replacement = tmp;
4780 changed = 1;
4781 }
4782
4783 /* Flag when we've reached the symbol part of .eval/.asg. */
4784 if (eval_line && ptr >= eval_end)
4785 eval_symbol = 1;
4786
4787 /* For each apparent symbol, see if it's a substitution symbol, and if
4788 so, replace it in the input. */
4789 if ((forced && current_char == ':')
4790 || (!forced && is_name_beginner (current_char)))
4791 {
4792 char *name; /* Symbol to be replaced. */
4793 char *savedp = input_line_pointer;
4794 int c;
4795 char *value = NULL;
4796 char *tail; /* Rest of line after symbol. */
4797
4798 /* Skip the colon. */
4799 if (forced)
4800 ++ptr;
4801
4802 name = input_line_pointer = ptr;
4803 c = get_symbol_end ();
4804 /* '?' is not normally part of a symbol, but it IS part of a local
4805 label. */
4806 if (c == '?')
4807 {
4808 *input_line_pointer++ = c;
4809 c = *input_line_pointer;
4810 *input_line_pointer = '\0';
4811 }
4812 /* Avoid infinite recursion; if a symbol shows up a second time for
4813 substitution, leave it as is. */
4814 if (hash_find (subsym_recurse_hash, name) == NULL)
4815 value = subsym_lookup (name, macro_level);
4816 else
4817 as_warn (_("%s symbol recursion stopped at "
4818 "second appearance of '%s'"),
4819 forced ? "Forced substitution" : "Substitution", name);
4820 ptr = tail = input_line_pointer;
4821 input_line_pointer = savedp;
4822
4823 /* Check for local labels; replace them with the appropriate
4824 substitution. */
4825 if ((*name == '$' && ISDIGIT (name[1]) && name[2] == '\0')
4826 || name[strlen (name) - 1] == '?')
4827 {
4828 /* Use an existing identifier for that label if, available, or
4829 create a new, unique identifier. */
4830 value = hash_find (local_label_hash[macro_level], name);
4831 if (value == NULL)
4832 {
4833 char digit[11];
4834 char *namecopy = strcpy (xmalloc (strlen (name) + 1), name);
4835
4836 value = strcpy (xmalloc (strlen (name) + sizeof (digit) + 1),
4837 name);
4838 if (*value != '$')
4839 value[strlen (value) - 1] = '\0';
4840 sprintf (digit, ".%d", local_label_id++);
4841 strcat (value, digit);
4842 hash_insert (local_label_hash[macro_level], namecopy, value);
4843 }
4844 /* Indicate where to continue looking for substitutions. */
4845 ptr = tail;
4846 }
4847 /* Check for built-in subsym and math functions. */
4848 else if (value != NULL && *name == '$')
4849 {
4850 subsym_proc_entry *entry = (subsym_proc_entry *) value;
4851 math_proc_entry *math_entry = hash_find (math_hash, name);
4852 char *arg1, *arg2 = NULL;
4853
4854 *ptr = c;
4855 if (entry == NULL)
4856 {
4857 as_bad (_("Unrecognized substitution symbol function"));
4858 break;
4859 }
4860 else if (*ptr != '(')
4861 {
4862 as_bad (_("Missing '(' after substitution symbol function"));
4863 break;
4864 }
4865 ++ptr;
4866 if (math_entry != NULL)
4867 {
4868 float arg1, arg2 = 0;
4869 volatile float fresult;
4870
4871 arg1 = (float) strtod (ptr, &ptr);
4872 if (math_entry->nargs == 2)
4873 {
4874 if (*ptr++ != ',')
4875 {
4876 as_bad (_("Expecting second argument"));
4877 break;
4878 }
4879 arg2 = (float) strtod (ptr, &ptr);
4880 }
4881 fresult = (*math_entry->proc) (arg1, arg2);
4882 value = xmalloc (128);
4883 if (math_entry->int_return)
4884 sprintf (value, "%d", (int) fresult);
4885 else
4886 sprintf (value, "%f", fresult);
4887 if (*ptr++ != ')')
4888 {
4889 as_bad (_("Extra junk in function call, expecting ')'"));
4890 break;
4891 }
4892 /* Don't bother recursing; the replacement isn't a
4893 symbol. */
4894 recurse = 0;
4895 }
4896 else
4897 {
4898 int val;
4899 int arg_type[2] = { *ptr == '"' , 0 };
4900 int ismember = !strcmp (entry->name, "$ismember");
4901
4902 /* Parse one or two args, which must be a substitution
4903 symbol, string or a character-string constant. */
4904 /* For all functions, a string or substitution symbol may be
4905 used, with the following exceptions:
4906 firstch/lastch: 2nd arg must be character constant
4907 ismember: both args must be substitution symbols. */
4908 ptr = subsym_get_arg (ptr, ",)", &arg1, ismember);
4909 if (!arg1)
4910 break;
4911 if (entry->nargs == 2)
4912 {
4913 if (*ptr++ != ',')
4914 {
4915 as_bad (_("Function expects two arguments"));
4916 break;
4917 }
4918 /* Character constants are converted to numerics
4919 by the preprocessor. */
4920 arg_type[1] = (ISDIGIT (*ptr)) ? 2 : (*ptr == '"');
4921 ptr = subsym_get_arg (ptr, ")", &arg2, ismember);
4922 }
4923 /* Args checking. */
4924 if ((!strcmp (entry->name, "$firstch")
4925 || !strcmp (entry->name, "$lastch"))
4926 && arg_type[1] != 2)
4927 {
4928 as_bad (_("Expecting character constant argument"));
4929 break;
4930 }
4931 if (ismember
4932 && (arg_type[0] != 0 || arg_type[1] != 0))
4933 {
4934 as_bad (_("Both arguments must be substitution symbols"));
4935 break;
4936 }
4937 if (*ptr++ != ')')
4938 {
4939 as_bad (_("Extra junk in function call, expecting ')'"));
4940 break;
4941 }
4942 val = (*entry->proc) (arg1, arg2);
4943 value = xmalloc (64);
4944 sprintf (value, "%d", val);
4945 }
4946 /* Fix things up to replace the entire expression, not just the
4947 function name. */
4948 tail = ptr;
4949 c = *tail;
4950 }
4951
4952 if (value != NULL && !eval_symbol)
4953 {
4954 /* Replace the symbol with its string replacement and
4955 continue. Recursively replace VALUE until either no
4956 substitutions are performed, or a substitution that has been
4957 previously made is encountered again.
4958
4959 put the symbol into the recursion hash table so we only
4960 try to replace a symbol once. */
4961 if (recurse)
4962 {
4963 hash_insert (subsym_recurse_hash, name, name);
4964 value = subsym_substitute (value, macro_level > 0);
4965 hash_delete (subsym_recurse_hash, name);
4966 }
4967
4968 /* Temporarily zero-terminate where the symbol started. */
4969 *name = 0;
4970 if (forced)
4971 {
4972 if (c == '(')
4973 {
4974 /* Subscripted substitution symbol -- use just the
4975 indicated portion of the string; the description
4976 kinda indicates that forced substitution is not
4977 supposed to be recursive, but I'm not sure. */
4978 unsigned beg, len = 1; /* default to a single char */
4979 char *newval = strcpy (xmalloc (strlen (value) + 1),
4980 value);
4981
4982 savedp = input_line_pointer;
4983 input_line_pointer = tail + 1;
4984 beg = get_absolute_expression ();
4985 if (beg < 1)
4986 {
4987 as_bad (_("Invalid subscript (use 1 to %d)"),
4988 strlen (value));
4989 break;
4990 }
4991 if (*input_line_pointer == ',')
4992 {
4993 ++input_line_pointer;
4994 len = get_absolute_expression ();
4995 if (beg + len > strlen (value))
4996 {
4997 as_bad (_("Invalid length (use 0 to %d"),
4998 strlen (value) - beg);
4999 break;
5000 }
5001 }
5002 newval += beg - 1;
5003 newval[len] = 0;
5004 tail = input_line_pointer;
5005 if (*tail++ != ')')
5006 {
5007 as_bad (_("Missing ')' in subscripted substitution "
5008 "symbol expression"));
5009 break;
5010 }
5011 c = *tail;
5012 input_line_pointer = savedp;
5013
5014 value = newval;
5015 }
5016 name[-1] = 0;
5017 }
5018 tmp = xmalloc (strlen (head) + strlen (value) +
5019 strlen (tail + 1) + 2);
5020 strcpy (tmp, head);
5021 strcat (tmp, value);
5022 /* Make sure forced substitutions are properly terminated. */
5023 if (forced)
5024 {
5025 if (c != ':')
5026 {
5027 as_bad (_("Missing forced substitution terminator ':'"));
5028 break;
5029 }
5030 ++tail;
5031 }
5032 else
5033 /* Restore the character after the symbol end. */
5034 *tail = c;
5035 strcat (tmp, tail);
5036 /* Continue examining after the replacement value. */
5037 ptr = tmp + strlen (head) + strlen (value);
5038 free (replacement);
5039 head = replacement = tmp;
5040 changed = 1;
5041 }
5042 else
5043 *ptr = c;
5044 }
5045 else
5046 {
5047 ++ptr;
5048 }
5049 }
5050
5051 if (changed)
5052 return replacement;
5053 else
5054 return line;
5055 }
5056
5057 /* We use this to handle substitution symbols
5058 hijack input_line_pointer, replacing it with our substituted string.
5059
5060 .sslist should enable listing the line after replacements are made...
5061
5062 returns the new buffer limit. */
5063
5064 void
5065 tic54x_start_line_hook ()
5066 {
5067 char *line, *endp;
5068 char *replacement = NULL;
5069
5070 /* Work with a copy of the input line, including EOL char. */
5071 endp = input_line_pointer;
5072 while (!is_end_of_line[(int) *endp++])
5073 ;
5074 line = xmalloc (endp - input_line_pointer + 1);
5075 strncpy (line, input_line_pointer, endp - input_line_pointer + 1);
5076 line[endp - input_line_pointer] = 0;
5077
5078 /* Scan ahead for parallel insns. */
5079 parallel_on_next_line_hint = next_line_shows_parallel (endp + 1);
5080
5081 /* If within a macro, first process forced replacements. */
5082 if (macro_level > 0)
5083 replacement = subsym_substitute (line, 1);
5084 else
5085 replacement = line;
5086 replacement = subsym_substitute (replacement, 0);
5087
5088 if (replacement != line)
5089 {
5090 char *tmp = replacement;
5091 char *comment = strchr (replacement, ';');
5092 char endc = replacement[strlen (replacement) - 1];
5093
5094 /* Clean up the replacement; we'd prefer to have this done by the
5095 standard preprocessing equipment (maybe do_scrub_chars?)
5096 but for now, do a quick-and-dirty. */
5097 if (comment != NULL)
5098 {
5099 comment[0] = endc;
5100 comment[1] = 0;
5101 --comment;
5102 }
5103 else
5104 comment = replacement + strlen (replacement) - 1;
5105
5106 /* Trim trailing whitespace. */
5107 while (ISSPACE (*comment))
5108 {
5109 comment[0] = endc;
5110 comment[1] = 0;
5111 --comment;
5112 }
5113
5114 /* Compact leading whitespace. */
5115 while (ISSPACE (tmp[0]) && ISSPACE (tmp[1]))
5116 ++tmp;
5117
5118 input_line_pointer = endp;
5119 input_scrub_insert_line (tmp);
5120 free (replacement);
5121 free (line);
5122 /* Keep track of whether we've done a substitution. */
5123 substitution_line = 1;
5124 }
5125 else
5126 {
5127 /* No change. */
5128 free (line);
5129 substitution_line = 0;
5130 }
5131 }
5132
5133 /* This is the guts of the machine-dependent assembler. STR points to a
5134 machine dependent instruction. This function is supposed to emit
5135 the frags/bytes it assembles to. */
5136 void
5137 md_assemble (line)
5138 char *line;
5139 {
5140 static int repeat_slot = 0;
5141 static int delay_slots = 0; /* How many delay slots left to fill? */
5142 static int is_parallel = 0;
5143 static tic54x_insn insn;
5144 char *lptr;
5145 char *savedp = input_line_pointer;
5146 int c;
5147
5148 input_line_pointer = line;
5149 c = get_symbol_end ();
5150
5151 if (cpu == VNONE)
5152 cpu = V542;
5153 if (address_mode_needs_set)
5154 {
5155 set_address_mode (amode);
5156 address_mode_needs_set = 0;
5157 }
5158 if (cpu_needs_set)
5159 {
5160 set_cpu (cpu);
5161 cpu_needs_set = 0;
5162 }
5163 assembly_begun = 1;
5164
5165 if (is_parallel)
5166 {
5167 is_parallel = 0;
5168
5169 strcpy (insn.parmnemonic, line);
5170 lptr = input_line_pointer;
5171 *lptr = c;
5172 input_line_pointer = savedp;
5173
5174 if (tic54x_parse_parallel_insn_lastline (&insn, lptr))
5175 {
5176 int words = build_insn (&insn);
5177
5178 if (delay_slots != 0)
5179 {
5180 if (words > delay_slots)
5181 {
5182 as_bad (_("Instruction does not fit in available delay "
5183 "slots (%d-word insn, %d slots left)"),
5184 words, delay_slots);
5185 delay_slots = 0;
5186 return;
5187 }
5188 delay_slots -= words;
5189 }
5190 }
5191 return;
5192 }
5193
5194 memset (&insn, 0, sizeof (insn));
5195 strcpy (insn.mnemonic, line);
5196 lptr = input_line_pointer;
5197 *lptr = c;
5198 input_line_pointer = savedp;
5199
5200 /* See if this line is part of a parallel instruction; if so, either this
5201 line or the next line will have the "||" specifier preceding the
5202 mnemonic, and we look for it in the parallel insn hash table. */
5203 if (strstr (line, "||") != NULL || parallel_on_next_line_hint)
5204 {
5205 char *tmp = strstr (line, "||");
5206 if (tmp != NULL)
5207 *tmp = '\0';
5208
5209 if (tic54x_parse_parallel_insn_firstline (&insn, lptr))
5210 {
5211 is_parallel = 1;
5212 /* If the parallel part is on the same line, process it now,
5213 otherwise let the assembler pick up the next line for us. */
5214 if (tmp != NULL)
5215 {
5216 while (ISSPACE (tmp[2]))
5217 ++tmp;
5218 md_assemble (tmp + 2);
5219 }
5220 }
5221 else
5222 {
5223 as_bad (_("Unrecognized parallel instruction '%s'"), line);
5224 }
5225 return;
5226 }
5227
5228 if (tic54x_parse_insn (&insn, lptr))
5229 {
5230 int words;
5231
5232 if ((insn.tm->flags & FL_LP)
5233 && cpu != V545LP && cpu != V546LP)
5234 {
5235 as_bad (_("Instruction '%s' requires an LP cpu version"),
5236 insn.tm->name);
5237 return;
5238 }
5239 if ((insn.tm->flags & FL_FAR)
5240 && amode != far_mode)
5241 {
5242 as_bad (_("Instruction '%s' requires far mode addressing"),
5243 insn.tm->name);
5244 return;
5245 }
5246
5247 words = build_insn (&insn);
5248
5249 /* Is this instruction in a delay slot? */
5250 if (delay_slots)
5251 {
5252 if (words > delay_slots)
5253 {
5254 as_warn (_("Instruction does not fit in available delay "
5255 "slots (%d-word insn, %d slots left). "
5256 "Resulting behavior is undefined."),
5257 words, delay_slots);
5258 delay_slots = 0;
5259 return;
5260 }
5261 /* Branches in delay slots are not allowed. */
5262 if (insn.tm->flags & FL_BMASK)
5263 {
5264 as_warn (_("Instructions which cause PC discontinuity are not "
5265 "allowed in a delay slot. "
5266 "Resulting behavior is undefined."));
5267 }
5268 delay_slots -= words;
5269 }
5270
5271 /* Is this instruction the target of a repeat? */
5272 if (repeat_slot)
5273 {
5274 if (insn.tm->flags & FL_NR)
5275 as_warn (_("'%s' is not repeatable. "
5276 "Resulting behavior is undefined."),
5277 insn.tm->name);
5278 else if (insn.is_lkaddr)
5279 as_warn (_("Instructions using long offset modifiers or absolute "
5280 "addresses are not repeatable. "
5281 "Resulting behavior is undefined."));
5282 repeat_slot = 0;
5283 }
5284
5285 /* Make sure we check the target of a repeat instruction. */
5286 if (insn.tm->flags & B_REPEAT)
5287 {
5288 repeat_slot = 1;
5289 /* FIXME -- warn if repeat_slot == 1 at EOF. */
5290 }
5291 /* Make sure we check our delay slots for validity. */
5292 if (insn.tm->flags & FL_DELAY)
5293 {
5294 delay_slots = 2;
5295 /* FIXME -- warn if delay_slots != 0 at EOF. */
5296 }
5297 }
5298 }
5299
5300 /* Do a final adjustment on the symbol table; in this case, make sure we have
5301 a ".file" symbol. */
5302
5303 void
5304 tic54x_adjust_symtab ()
5305 {
5306 if (symbol_rootP == NULL
5307 || S_GET_STORAGE_CLASS (symbol_rootP) != C_FILE)
5308 {
5309 char *filename;
5310 unsigned lineno;
5311 as_where (&filename, &lineno);
5312 c_dot_file_symbol (filename, 0);
5313 }
5314 }
5315
5316 /* In order to get gas to ignore any | chars at the start of a line,
5317 this function returns true if a | is found in a line.
5318 This lets us process parallel instructions, which span two lines. */
5319
5320 int
5321 tic54x_unrecognized_line (int c)
5322 {
5323 return c == PARALLEL_SEPARATOR;
5324 }
5325
5326 /* Watch for local labels of the form $[0-9] and [_a-zA-Z][_a-zA-Z0-9]*?
5327 Encode their names so that only we see them and can map them to the
5328 appropriate places.
5329 FIXME -- obviously this isn't done yet. These locals still show up in the
5330 symbol table. */
5331 void
5332 tic54x_define_label (sym)
5333 symbolS *sym;
5334 {
5335 /* Just in case we need this later; note that this is not necessarily the
5336 same thing as line_label...
5337 When aligning or assigning labels to fields, sometimes the label is
5338 assigned other than the address at which the label appears.
5339 FIXME -- is this really needed? I think all the proper label assignment
5340 is done in tic54x_cons. */
5341 last_label_seen = sym;
5342 }
5343
5344 /* Try to parse something that normal parsing failed at. */
5345
5346 symbolS *
5347 tic54x_undefined_symbol (name)
5348 char *name;
5349 {
5350 symbol *sym;
5351
5352 /* Not sure how to handle predefined symbols. */
5353 if ((sym = (symbol *) hash_find (cc_hash, name)) != NULL ||
5354 (sym = (symbol *) hash_find (cc2_hash, name)) != NULL ||
5355 (sym = (symbol *) hash_find (cc3_hash, name)) != NULL ||
5356 (sym = (symbol *) hash_find (misc_symbol_hash, name)) != NULL ||
5357 (sym = (symbol *) hash_find (sbit_hash, name)) != NULL)
5358 {
5359 return symbol_new (name, reg_section,
5360 (valueT) sym->value,
5361 &zero_address_frag);
5362 }
5363
5364 if ((sym = (symbol *) hash_find (reg_hash, name)) != NULL ||
5365 (sym = (symbol *) hash_find (mmreg_hash, name)) != NULL ||
5366 !strcasecmp (name, "a") || !strcasecmp (name, "b"))
5367 {
5368 return symbol_new (name, reg_section,
5369 (valueT) sym ? sym->value : 0,
5370 &zero_address_frag);
5371 }
5372
5373 return NULL;
5374 }
5375
5376 /* Parse a name in an expression before the expression parser takes a stab at
5377 it. */
5378
5379 int
5380 tic54x_parse_name (name, exp)
5381 char *name ATTRIBUTE_UNUSED;
5382 expressionS *exp ATTRIBUTE_UNUSED;
5383 {
5384 return 0;
5385 }
5386
5387 char *
5388 md_atof (type, literalP, sizeP)
5389 int type;
5390 char *literalP;
5391 int *sizeP;
5392 {
5393 #define MAX_LITTLENUMS 2
5394 LITTLENUM_TYPE words[MAX_LITTLENUMS];
5395 LITTLENUM_TYPE *word;
5396 /* Only one precision on the c54x. */
5397 int prec = 2;
5398 char *t = atof_ieee (input_line_pointer, type, words);
5399 if (t)
5400 input_line_pointer = t;
5401 *sizeP = 4;
5402
5403 /* Target data is little-endian, but floats are stored
5404 big-"word"ian. ugh. */
5405 for (word = words; prec--;)
5406 {
5407 md_number_to_chars (literalP, (long) (*word++), sizeof (LITTLENUM_TYPE));
5408 literalP += sizeof (LITTLENUM_TYPE);
5409 }
5410
5411 return 0;
5412 }
5413
5414 arelent *
5415 tc_gen_reloc (section, fixP)
5416 asection *section;
5417 fixS *fixP;
5418 {
5419 arelent *rel;
5420 bfd_reloc_code_real_type code = fixP->fx_r_type;
5421 asymbol *sym = symbol_get_bfdsym (fixP->fx_addsy);
5422
5423 rel = (arelent *) xmalloc (sizeof (arelent));
5424 rel->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
5425 *rel->sym_ptr_ptr = sym;
5426 /* We assume that all rel->address are host byte offsets. */
5427 rel->address = fixP->fx_frag->fr_address + fixP->fx_where;
5428 rel->address /= OCTETS_PER_BYTE;
5429 rel->howto = bfd_reloc_type_lookup (stdoutput, code);
5430 if (!strcmp (sym->name, section->name))
5431 rel->howto += HOWTO_BANK;
5432
5433 if (!rel->howto)
5434 {
5435 const char *name = S_GET_NAME (fixP->fx_addsy);
5436 if (name == NULL)
5437 name = "<unknown>";
5438 as_fatal ("Cannot generate relocation type for symbol %s, code %s",
5439 name, bfd_get_reloc_code_name (code));
5440 return NULL;
5441 }
5442 return rel;
5443 }
5444
5445 /* Handle cons expressions. */
5446
5447 void
5448 tic54x_cons_fix_new (frag, where, octets, exp)
5449 fragS *frag;
5450 int where;
5451 int octets;
5452 expressionS *exp;
5453 {
5454 bfd_reloc_code_real_type r;
5455
5456 switch (octets)
5457 {
5458 default:
5459 as_bad (_("Unsupported relocation size %d"), octets);
5460 r = BFD_RELOC_TIC54X_16_OF_23;
5461 break;
5462 case 2:
5463 r = BFD_RELOC_TIC54X_16_OF_23;
5464 break;
5465 case 4:
5466 /* TI assembler always uses this, regardless of addressing mode. */
5467 if (emitting_long)
5468 r = BFD_RELOC_TIC54X_23;
5469 else
5470 /* We never want to directly generate this; this is provided for
5471 stabs support only. */
5472 r = BFD_RELOC_32;
5473 break;
5474 }
5475 fix_new_exp (frag, where, octets, exp, 0, r);
5476 }
5477
5478 /* Attempt to simplify or even eliminate a fixup.
5479 To indicate that a fixup has been eliminated, set fixP->fx_done.
5480
5481 If fixp->fx_addsy is non-NULL, we'll have to generate a reloc entry. */
5482
5483 void
5484 md_apply_fix (fixP, valP, seg)
5485 fixS *fixP;
5486 valueT * valP;
5487 segT seg ATTRIBUTE_UNUSED;
5488 {
5489 char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
5490 valueT val = * valP;
5491
5492 switch (fixP->fx_r_type)
5493 {
5494 default:
5495 as_fatal ("Bad relocation type: 0x%02x", fixP->fx_r_type);
5496 return;
5497 case BFD_RELOC_TIC54X_MS7_OF_23:
5498 val = (val >> 16) & 0x7F;
5499 /* Fall through. */
5500 case BFD_RELOC_TIC54X_16_OF_23:
5501 case BFD_RELOC_16:
5502 bfd_put_16 (stdoutput, val, buf);
5503 /* Indicate what we're actually writing, so that we don't get warnings
5504 about exceeding available space. */
5505 *valP = val & 0xFFFF;
5506 break;
5507 case BFD_RELOC_TIC54X_PARTLS7:
5508 bfd_put_16 (stdoutput,
5509 (bfd_get_16 (stdoutput, buf) & 0xFF80) | (val & 0x7F),
5510 buf);
5511 /* Indicate what we're actually writing, so that we don't get warnings
5512 about exceeding available space. */
5513 *valP = val & 0x7F;
5514 break;
5515 case BFD_RELOC_TIC54X_PARTMS9:
5516 /* TI assembler doesn't shift its encoding for relocatable files, and is
5517 thus incompatible with this implementation's relocatable files. */
5518 bfd_put_16 (stdoutput,
5519 (bfd_get_16 (stdoutput, buf) & 0xFE00) | (val >> 7),
5520 buf);
5521 break;
5522 case BFD_RELOC_32:
5523 case BFD_RELOC_TIC54X_23:
5524 bfd_put_32 (stdoutput,
5525 (bfd_get_32 (stdoutput, buf) & 0xFF800000) | val,
5526 buf);
5527 break;
5528 }
5529
5530 if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
5531 fixP->fx_done = 1;
5532 }
5533
5534 /* This is our chance to record section alignment
5535 don't need to do anything here, since BFD does the proper encoding. */
5536
5537 valueT
5538 md_section_align (segment, section_size)
5539 segT segment ATTRIBUTE_UNUSED;
5540 valueT section_size;
5541 {
5542 return section_size;
5543 }
5544
5545 long
5546 md_pcrel_from (fixP)
5547 fixS *fixP ATTRIBUTE_UNUSED;
5548 {
5549 return 0;
5550 }
5551
5552 #if defined OBJ_COFF
5553
5554 short
5555 tc_coff_fix2rtype (fixP)
5556 fixS *fixP;
5557 {
5558 return (fixP->fx_r_type);
5559 }
5560
5561 #endif /* OBJ_COFF */
5562
5563 /* Mostly little-endian, but longwords (4 octets) get MS word stored
5564 first. */
5565
5566 void
5567 tic54x_number_to_chars (buf, val, n)
5568 char *buf;
5569 valueT val;
5570 int n;
5571 {
5572 if (n != 4)
5573 number_to_chars_littleendian (buf, val, n);
5574 else
5575 {
5576 number_to_chars_littleendian (buf , val >> 16 , 2);
5577 number_to_chars_littleendian (buf + 2, val & 0xFFFF, 2);
5578 }
5579 }
5580
5581 int
5582 tic54x_estimate_size_before_relax (frag, seg)
5583 fragS *frag ATTRIBUTE_UNUSED;
5584 segT seg ATTRIBUTE_UNUSED;
5585 {
5586 return 0;
5587 }
5588
5589 /* We use this to handle bit allocations which we couldn't handle before due
5590 to symbols being in different frags. return number of octets added. */
5591
5592 int
5593 tic54x_relax_frag (frag, stretch)
5594 fragS *frag;
5595 long stretch ATTRIBUTE_UNUSED;
5596 {
5597 symbolS *sym = frag->fr_symbol;
5598 int growth = 0;
5599 int i;
5600
5601 if (sym != NULL)
5602 {
5603 struct bit_info *bi = (struct bit_info *) frag->fr_opcode;
5604 int bit_offset = frag_bit_offset (frag_prev (frag, bi->seg), bi->seg);
5605 int size = S_GET_VALUE (sym);
5606 fragS *prev_frag = bit_offset_frag (frag_prev (frag, bi->seg), bi->seg);
5607 int available = 16 - bit_offset;
5608
5609 if (symbol_get_frag (sym) != &zero_address_frag
5610 || S_IS_COMMON (sym)
5611 || !S_IS_DEFINED (sym))
5612 as_bad_where (frag->fr_file, frag->fr_line,
5613 _("non-absolute value used with .space/.bes"));
5614
5615 if (size < 0)
5616 {
5617 as_warn (_("negative value ignored in %s"),
5618 bi->type == TYPE_SPACE ? ".space" :
5619 bi->type == TYPE_BES ? ".bes" : ".field");
5620 growth = 0;
5621 frag->tc_frag_data = frag->fr_fix = 0;
5622 return 0;
5623 }
5624
5625 if (bi->type == TYPE_FIELD)
5626 {
5627 /* Bit fields of 16 or larger will have already been handled. */
5628 if (bit_offset != 0 && available >= size)
5629 {
5630 char *p = prev_frag->fr_literal;
5631
5632 valueT value = bi->value;
5633 value <<= available - size;
5634 value |= ((unsigned short) p[1] << 8) | p[0];
5635 md_number_to_chars (p, value, 2);
5636 if ((prev_frag->tc_frag_data += size) == 16)
5637 prev_frag->tc_frag_data = 0;
5638 if (bi->sym)
5639 symbol_set_frag (bi->sym, prev_frag);
5640 /* This frag is no longer used. */
5641 growth = -frag->fr_fix;
5642 frag->fr_fix = 0;
5643 frag->tc_frag_data = 0;
5644 }
5645 else
5646 {
5647 char *p = frag->fr_literal;
5648
5649 valueT value = bi->value << (16 - size);
5650 md_number_to_chars (p, value, 2);
5651 if ((frag->tc_frag_data = size) == 16)
5652 frag->tc_frag_data = 0;
5653 growth = 0;
5654 }
5655 }
5656 else
5657 {
5658 if (bit_offset != 0 && bit_offset < 16)
5659 {
5660 if (available >= size)
5661 {
5662 if ((prev_frag->tc_frag_data += size) == 16)
5663 prev_frag->tc_frag_data = 0;
5664 if (bi->sym)
5665 symbol_set_frag (bi->sym, prev_frag);
5666 /* This frag is no longer used. */
5667 growth = -frag->fr_fix;
5668 frag->fr_fix = 0;
5669 frag->tc_frag_data = 0;
5670 goto getout;
5671 }
5672 if (bi->type == TYPE_SPACE && bi->sym)
5673 symbol_set_frag (bi->sym, prev_frag);
5674 size -= available;
5675 }
5676 growth = (size + 15) / 16 * OCTETS_PER_BYTE - frag->fr_fix;
5677 for (i = 0; i < growth; i++)
5678 frag->fr_literal[i] = 0;
5679 frag->fr_fix = growth;
5680 frag->tc_frag_data = size % 16;
5681 /* Make sure any BES label points to the LAST word allocated. */
5682 if (bi->type == TYPE_BES && bi->sym)
5683 S_SET_VALUE (bi->sym, frag->fr_fix / OCTETS_PER_BYTE - 1);
5684 }
5685 getout:
5686 frag->fr_symbol = 0;
5687 frag->fr_opcode = 0;
5688 free ((void *) bi);
5689 }
5690 return growth;
5691 }
5692
5693 void
5694 tic54x_convert_frag (abfd, seg, frag)
5695 bfd *abfd ATTRIBUTE_UNUSED;
5696 segT seg ATTRIBUTE_UNUSED;
5697 fragS *frag;
5698 {
5699 /* Offset is in bytes. */
5700 frag->fr_offset = (frag->fr_next->fr_address
5701 - frag->fr_address
5702 - frag->fr_fix) / frag->fr_var;
5703 if (frag->fr_offset < 0)
5704 {
5705 as_bad_where (frag->fr_file, frag->fr_line,
5706 _("attempt to .space/.bes backwards? (%ld)"),
5707 (long) frag->fr_offset);
5708 }
5709 frag->fr_type = rs_space;
5710 }
5711
5712 /* We need to avoid having labels defined for certain directives/pseudo-ops
5713 since once the label is defined, it's in the symbol table for good. TI
5714 syntax puts the symbol *before* the pseudo (which is kinda like MRI syntax,
5715 I guess, except I've never seen a definition of MRI syntax).
5716
5717 C is the character that used to be at *REST, which points to the end of the
5718 label.
5719
5720 Don't allow labels to start with '.' */
5721
5722 int
5723 tic54x_start_label (c, rest)
5724 int c;
5725 char *rest;
5726 {
5727 /* If within .struct/.union, no auto line labels, please. */
5728 if (current_stag != NULL)
5729 return 0;
5730
5731 /* Disallow labels starting with "." */
5732 if (c != ':')
5733 {
5734 char *label = rest;
5735
5736 while (!is_end_of_line[(int) label[-1]])
5737 --label;
5738 if (*label == '.')
5739 {
5740 as_bad (_("Invalid label '%s'"), label);
5741 return 0;
5742 }
5743 }
5744
5745 if (is_end_of_line[(int) c])
5746 return 1;
5747
5748 if (ISSPACE (c))
5749 while (ISSPACE (c = *++rest))
5750 ;
5751 if (c == '.')
5752 {
5753 /* Don't let colon () define a label for any of these... */
5754 return (strncasecmp (rest, ".tag", 4) != 0 || !ISSPACE (rest[4]))
5755 && (strncasecmp (rest, ".struct", 7) != 0 || !ISSPACE (rest[7]))
5756 && (strncasecmp (rest, ".union", 6) != 0 || !ISSPACE (rest[6]))
5757 && (strncasecmp (rest, ".macro", 6) != 0 || !ISSPACE (rest[6]))
5758 && (strncasecmp (rest, ".set", 4) != 0 || !ISSPACE (rest[4]))
5759 && (strncasecmp (rest, ".equ", 4) != 0 || !ISSPACE (rest[4]));
5760 }
5761
5762 return 1;
5763 }
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