1 /* spu.c -- Assembler for the IBM Synergistic Processing Unit (SPU)
2
3 Copyright (C) 2006-2022 Free Software Foundation, Inc.
4
5 This file is part of GAS, the GNU Assembler.
6
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
10 any later version.
11
12 GAS is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to the Free
19 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
20 02110-1301, USA. */
21
22 #include "as.h"
23 #include "safe-ctype.h"
24 #include "subsegs.h"
25 #include "dwarf2dbg.h"
26
27 const struct spu_opcode spu_opcodes[] = {
28 #define APUOP(TAG,MACFORMAT,OPCODE,MNEMONIC,ASMFORMAT,DEP,PIPE) \
29 { MACFORMAT, (OPCODE ## u) << (32-11), MNEMONIC, ASMFORMAT },
30 #define APUOPFB(TAG,MACFORMAT,OPCODE,FB,MNEMONIC,ASMFORMAT,DEP,PIPE) \
31 { MACFORMAT, ((OPCODE) << (32-11)) | ((FB) << (32-18)), MNEMONIC, ASMFORMAT },
32 #include "opcode/spu-insns.h"
33 #undef APUOP
34 #undef APUOPFB
35 };
36
37 static const int spu_num_opcodes =
38 sizeof (spu_opcodes) / sizeof (spu_opcodes[0]);
39
40 #define MAX_RELOCS 2
41
42 struct spu_insn
43 {
44 unsigned int opcode;
45 expressionS exp[MAX_RELOCS];
46 int reloc_arg[MAX_RELOCS];
47 bfd_reloc_code_real_type reloc[MAX_RELOCS];
48 enum spu_insns tag;
49 };
50
51 static const char *get_imm (const char *param, struct spu_insn *insn, int arg);
52 static const char *get_reg (const char *param, struct spu_insn *insn, int arg,
53 int accept_expr);
54 static int calcop (struct spu_opcode *format, const char *param,
55 struct spu_insn *insn);
56 static void spu_brinfo (int);
57 static void spu_cons (int);
58
59 extern char *myname;
60 static htab_t op_hash = NULL;
61
62 /* These bits should be turned off in the first address of every segment */
63 int md_seg_align = 7;
64
65 /* These chars start a comment anywhere in a source file (except inside
66 another comment */
67 const char comment_chars[] = "#";
68
69 /* These chars only start a comment at the beginning of a line. */
70 const char line_comment_chars[] = "#";
71
72 /* gods own line continuation char */
73 const char line_separator_chars[] = ";";
74
75 /* Chars that can be used to separate mant from exp in floating point nums */
76 const char EXP_CHARS[] = "eE";
77
78 /* Chars that mean this number is a floating point constant */
79 /* as in 0f123.456 */
80 /* or 0H1.234E-12 (see exp chars above) */
81 const char FLT_CHARS[] = "dDfF";
82
83 const pseudo_typeS md_pseudo_table[] =
84 {
85 {"align", s_align_ptwo, 4},
86 {"brinfo", spu_brinfo, 0},
87 {"bss", s_lcomm_bytes, 1},
88 {"def", s_set, 0},
89 {"dfloat", float_cons, 'd'},
90 {"ffloat", float_cons, 'f'},
91 {"global", s_globl, 0},
92 {"half", cons, 2},
93 {"int", spu_cons, 4},
94 {"long", spu_cons, 4},
95 {"quad", spu_cons, 8},
96 {"string", stringer, 8 + 1},
97 {"word", spu_cons, 4},
98 /* Force set to be treated as an instruction. */
99 {"set", NULL, 0},
100 {".set", s_set, 0},
101 /* Likewise for eqv. */
102 {"eqv", NULL, 0},
103 {".eqv", s_set, -1},
104 {0,0,0}
105 };
106
107 /* Bits plugged into branch instruction offset field. */
108 unsigned int brinfo;
109
110 void
md_begin(void)111 md_begin (void)
112 {
113 int i;
114
115 op_hash = str_htab_create ();
116
117 /* Hash each mnemonic and record its position. There are
118 duplicates, keep just the first. */
119 for (i = 0; i < spu_num_opcodes; i++)
120 str_hash_insert (op_hash, spu_opcodes[i].mnemonic, &spu_opcodes[i], 0);
121 }
122
123 const char *md_shortopts = "";
124 struct option md_longopts[] = {
125 #define OPTION_APUASM (OPTION_MD_BASE)
126 {"apuasm", no_argument, NULL, OPTION_APUASM},
127 #define OPTION_DD2 (OPTION_MD_BASE+1)
128 {"mdd2.0", no_argument, NULL, OPTION_DD2},
129 #define OPTION_DD1 (OPTION_MD_BASE+2)
130 {"mdd1.0", no_argument, NULL, OPTION_DD1},
131 #define OPTION_DD3 (OPTION_MD_BASE+3)
132 {"mdd3.0", no_argument, NULL, OPTION_DD3},
133 { NULL, no_argument, NULL, 0 }
134 };
135 size_t md_longopts_size = sizeof (md_longopts);
136
137 /* When set (by -apuasm) our assembler emulates the behaviour of apuasm.
138 * e.g. don't add bias to float conversion and don't right shift
139 * immediate values. */
140 static int emulate_apuasm;
141
142 /* Use the dd2.0 instructions set. The only differences are some new
143 * register names and the orx insn */
144 static int use_dd2 = 1;
145
146 int
md_parse_option(int c,const char * arg ATTRIBUTE_UNUSED)147 md_parse_option (int c, const char *arg ATTRIBUTE_UNUSED)
148 {
149 switch (c)
150 {
151 case OPTION_APUASM:
152 emulate_apuasm = 1;
153 break;
154 case OPTION_DD3:
155 use_dd2 = 1;
156 break;
157 case OPTION_DD2:
158 use_dd2 = 1;
159 break;
160 case OPTION_DD1:
161 use_dd2 = 0;
162 break;
163 default:
164 return 0;
165 }
166 return 1;
167 }
168
169 void
md_show_usage(FILE * stream)170 md_show_usage (FILE *stream)
171 {
172 fputs (_("\
173 SPU options:\n\
174 --apuasm emulate behaviour of apuasm\n"),
175 stream);
176 }
177
178
179 struct arg_encode {
180 int size;
181 int pos;
182 int rshift;
183 int lo, hi;
184 int wlo, whi;
185 bfd_reloc_code_real_type reloc;
186 };
187
188 static struct arg_encode arg_encode[A_MAX] = {
189 { 7, 0, 0, 0, 127, 0, -1, 0 }, /* A_T */
190 { 7, 7, 0, 0, 127, 0, -1, 0 }, /* A_A */
191 { 7, 14, 0, 0, 127, 0, -1, 0 }, /* A_B */
192 { 7, 21, 0, 0, 127, 0, -1, 0 }, /* A_C */
193 { 7, 7, 0, 0, 127, 0, -1, 0 }, /* A_S */
194 { 7, 7, 0, 0, 127, 0, -1, 0 }, /* A_H */
195 { 0, 0, 0, 0, -1, 0, -1, 0 }, /* A_P */
196 { 7, 14, 0, 0, -1, 0, -1, BFD_RELOC_SPU_IMM7 }, /* A_S3 */
197 { 7, 14, 0, -32, 31, -31, 0, BFD_RELOC_SPU_IMM7 }, /* A_S6 */
198 { 7, 14, 0, 0, -1, 0, -1, BFD_RELOC_SPU_IMM7 }, /* A_S7N */
199 { 7, 14, 0, -64, 63, -63, 0, BFD_RELOC_SPU_IMM7 }, /* A_S7 */
200 { 8, 14, 0, 0, 127, 0, -1, BFD_RELOC_SPU_IMM8 }, /* A_U7A */
201 { 8, 14, 0, 0, 127, 0, -1, BFD_RELOC_SPU_IMM8 }, /* A_U7B */
202 { 10, 14, 0, -512, 511, -128, 255, BFD_RELOC_SPU_IMM10 }, /* A_S10B */
203 { 10, 14, 0, -512, 511, 0, -1, BFD_RELOC_SPU_IMM10 }, /* A_S10 */
204 { 2, 23, 9, -1024, 1023, 0, -1, BFD_RELOC_SPU_PCREL9a }, /* A_S11 */
205 { 2, 14, 9, -1024, 1023, 0, -1, BFD_RELOC_SPU_PCREL9b }, /* A_S11I */
206 { 10, 14, 4, -8192, 8191, 0, -1, BFD_RELOC_SPU_IMM10W }, /* A_S14 */
207 { 16, 7, 0, -32768, 32767, 0, -1, BFD_RELOC_SPU_IMM16 }, /* A_S16 */
208 { 16, 7, 2, -131072, 262143, 0, -1, BFD_RELOC_SPU_IMM16W }, /* A_S18 */
209 { 16, 7, 2, -262144, 262143, 0, -1, BFD_RELOC_SPU_PCREL16 }, /* A_R18 */
210 { 7, 14, 0, 0, -1, 0, -1, BFD_RELOC_SPU_IMM7 }, /* A_U3 */
211 { 7, 14, 0, 0, 127, 0, 31, BFD_RELOC_SPU_IMM7 }, /* A_U5 */
212 { 7, 14, 0, 0, 127, 0, 63, BFD_RELOC_SPU_IMM7 }, /* A_U6 */
213 { 7, 14, 0, 0, -1, 0, -1, BFD_RELOC_SPU_IMM7 }, /* A_U7 */
214 { 14, 0, 0, 0, 16383, 0, -1, 0 }, /* A_U14 */
215 { 16, 7, 0, -32768, 65535, 0, -1, BFD_RELOC_SPU_IMM16 }, /* A_X16 */
216 { 18, 7, 0, 0, 262143, 0, -1, BFD_RELOC_SPU_IMM18 }, /* A_U18 */
217 };
218
219 /* Some flags for handling errors. This is very hackish and added after
220 * the fact. */
221 static int syntax_error_arg;
222 static const char *syntax_error_param;
223 static int syntax_reg;
224
225 static char *
insn_fmt_string(struct spu_opcode * format)226 insn_fmt_string (struct spu_opcode *format)
227 {
228 static char buf[64];
229 int len = 0;
230 int i;
231
232 len += sprintf (&buf[len], "%s\t", format->mnemonic);
233 for (i = 1; i <= format->arg[0]; i++)
234 {
235 int arg = format->arg[i];
236 const char *exp;
237 if (i > 1 && arg != A_P && format->arg[i-1] != A_P)
238 buf[len++] = ',';
239 if (arg == A_P)
240 exp = "(";
241 else if (arg < A_P)
242 exp = i == syntax_error_arg ? "REG" : "reg";
243 else
244 exp = i == syntax_error_arg ? "IMM" : "imm";
245 len += sprintf (&buf[len], "%s", exp);
246 if (i > 1 && format->arg[i-1] == A_P)
247 buf[len++] = ')';
248 }
249 buf[len] = 0;
250 return buf;
251 }
252
253 void
md_assemble(char * op)254 md_assemble (char *op)
255 {
256 char *param, *thisfrag;
257 char c;
258 struct spu_opcode *format;
259 struct spu_insn insn;
260 int i;
261
262 gas_assert (op);
263
264 /* skip over instruction to find parameters */
265
266 for (param = op; *param != 0 && !ISSPACE (*param); param++)
267 ;
268 c = *param;
269 *param = 0;
270
271 if (c != 0 && c != '\n')
272 param++;
273
274 /* try to find the instruction in the hash table */
275
276 if ((format = (struct spu_opcode *) str_hash_find (op_hash, op)) == NULL)
277 {
278 as_bad (_("Invalid mnemonic '%s'"), op);
279 return;
280 }
281
282 if (!use_dd2 && strcmp (format->mnemonic, "orx") == 0)
283 {
284 as_bad (_("'%s' is only available in DD2.0 or higher."), op);
285 return;
286 }
287
288 while (1)
289 {
290 /* try parsing this instruction into insn */
291 for (i = 0; i < MAX_RELOCS; i++)
292 {
293 insn.exp[i].X_add_symbol = 0;
294 insn.exp[i].X_op_symbol = 0;
295 insn.exp[i].X_add_number = 0;
296 insn.exp[i].X_op = O_illegal;
297 insn.reloc_arg[i] = -1;
298 insn.reloc[i] = BFD_RELOC_NONE;
299 }
300 insn.opcode = format->opcode;
301 insn.tag = (enum spu_insns) (format - spu_opcodes);
302
303 syntax_error_arg = 0;
304 syntax_error_param = 0;
305 syntax_reg = 0;
306 if (calcop (format, param, &insn))
307 break;
308
309 /* if it doesn't parse try the next instruction */
310 if (!strcmp (format[0].mnemonic, format[1].mnemonic))
311 format++;
312 else
313 {
314 int parg = format[0].arg[syntax_error_arg-1];
315
316 as_fatal (_("Error in argument %d. Expecting: \"%s\""),
317 syntax_error_arg - (parg == A_P),
318 insn_fmt_string (format));
319 return;
320 }
321 }
322
323 if ((syntax_reg & 4)
324 && ! (insn.tag == M_RDCH
325 || insn.tag == M_RCHCNT
326 || insn.tag == M_WRCH))
327 as_warn (_("Mixing register syntax, with and without '$'."));
328 if (syntax_error_param)
329 {
330 const char *d = syntax_error_param;
331 while (*d != '$')
332 d--;
333 as_warn (_("Treating '%-*s' as a symbol."), (int)(syntax_error_param - d), d);
334 }
335
336 if (brinfo != 0
337 && (insn.tag <= M_BRASL
338 || (insn.tag >= M_BRZ && insn.tag <= M_BRHNZ))
339 && (insn.opcode & 0x7ff80) == 0
340 && (insn.reloc_arg[0] == A_R18
341 || insn.reloc_arg[0] == A_S18
342 || insn.reloc_arg[1] == A_R18
343 || insn.reloc_arg[1] == A_S18))
344 insn.opcode |= brinfo << 7;
345
346 /* grow the current frag and plop in the opcode */
347
348 thisfrag = frag_more (4);
349 md_number_to_chars (thisfrag, insn.opcode, 4);
350
351 /* if this instruction requires labels mark it for later */
352
353 for (i = 0; i < MAX_RELOCS; i++)
354 if (insn.reloc_arg[i] >= 0)
355 {
356 fixS *fixP;
357 bfd_reloc_code_real_type reloc = insn.reloc[i];
358 int pcrel = 0;
359
360 if (reloc == BFD_RELOC_SPU_PCREL9a
361 || reloc == BFD_RELOC_SPU_PCREL9b
362 || reloc == BFD_RELOC_SPU_PCREL16)
363 pcrel = 1;
364 fixP = fix_new_exp (frag_now,
365 thisfrag - frag_now->fr_literal,
366 4,
367 &insn.exp[i],
368 pcrel,
369 reloc);
370 fixP->tc_fix_data.arg_format = insn.reloc_arg[i];
371 fixP->tc_fix_data.insn_tag = insn.tag;
372 }
373 dwarf2_emit_insn (4);
374
375 /* .brinfo lasts exactly one instruction. */
376 brinfo = 0;
377 }
378
379 static int
calcop(struct spu_opcode * format,const char * param,struct spu_insn * insn)380 calcop (struct spu_opcode *format, const char *param, struct spu_insn *insn)
381 {
382 int i;
383 int paren = 0;
384 int arg;
385
386 for (i = 1; i <= format->arg[0]; i++)
387 {
388 arg = format->arg[i];
389 syntax_error_arg = i;
390
391 while (ISSPACE (*param))
392 param++;
393 if (*param == 0 || *param == ',')
394 return 0;
395 if (arg < A_P)
396 param = get_reg (param, insn, arg, 1);
397 else if (arg > A_P)
398 param = get_imm (param, insn, arg);
399 else if (arg == A_P)
400 {
401 paren++;
402 if ('(' != *param++)
403 return 0;
404 }
405
406 if (!param)
407 return 0;
408
409 while (ISSPACE (*param))
410 param++;
411
412 if (arg != A_P && paren)
413 {
414 paren--;
415 if (')' != *param++)
416 return 0;
417 }
418 else if (i < format->arg[0]
419 && format->arg[i] != A_P
420 && format->arg[i+1] != A_P)
421 {
422 if (',' != *param++)
423 {
424 syntax_error_arg++;
425 return 0;
426 }
427 }
428 }
429 while (ISSPACE (*param))
430 param++;
431 return !paren && (*param == 0 || *param == '\n');
432 }
433
434 struct reg_name {
435 unsigned int regno;
436 unsigned int length;
437 char name[32];
438 };
439
440 #define REG_NAME(NO,NM) { NO, sizeof (NM) - 1, NM }
441
442 static struct reg_name reg_name[] = {
443 REG_NAME (0, "lr"), /* link register */
444 REG_NAME (1, "sp"), /* stack pointer */
445 REG_NAME (0, "rp"), /* link register */
446 REG_NAME (127, "fp"), /* frame pointer */
447 };
448
449 static struct reg_name sp_reg_name[] = {
450 };
451
452 static struct reg_name ch_reg_name[] = {
453 REG_NAME ( 0, "SPU_RdEventStat"),
454 REG_NAME ( 1, "SPU_WrEventMask"),
455 REG_NAME ( 2, "SPU_WrEventAck"),
456 REG_NAME ( 3, "SPU_RdSigNotify1"),
457 REG_NAME ( 4, "SPU_RdSigNotify2"),
458 REG_NAME ( 7, "SPU_WrDec"),
459 REG_NAME ( 8, "SPU_RdDec"),
460 REG_NAME ( 11, "SPU_RdEventMask"), /* DD2.0 only */
461 REG_NAME ( 13, "SPU_RdMachStat"),
462 REG_NAME ( 14, "SPU_WrSRR0"),
463 REG_NAME ( 15, "SPU_RdSRR0"),
464 REG_NAME ( 28, "SPU_WrOutMbox"),
465 REG_NAME ( 29, "SPU_RdInMbox"),
466 REG_NAME ( 30, "SPU_WrOutIntrMbox"),
467 REG_NAME ( 9, "MFC_WrMSSyncReq"),
468 REG_NAME ( 12, "MFC_RdTagMask"), /* DD2.0 only */
469 REG_NAME ( 16, "MFC_LSA"),
470 REG_NAME ( 17, "MFC_EAH"),
471 REG_NAME ( 18, "MFC_EAL"),
472 REG_NAME ( 19, "MFC_Size"),
473 REG_NAME ( 20, "MFC_TagID"),
474 REG_NAME ( 21, "MFC_Cmd"),
475 REG_NAME ( 22, "MFC_WrTagMask"),
476 REG_NAME ( 23, "MFC_WrTagUpdate"),
477 REG_NAME ( 24, "MFC_RdTagStat"),
478 REG_NAME ( 25, "MFC_RdListStallStat"),
479 REG_NAME ( 26, "MFC_WrListStallAck"),
480 REG_NAME ( 27, "MFC_RdAtomicStat"),
481 };
482 #undef REG_NAME
483
484 static const char *
get_reg(const char * param,struct spu_insn * insn,int arg,int accept_expr)485 get_reg (const char *param, struct spu_insn *insn, int arg, int accept_expr)
486 {
487 unsigned regno;
488 int saw_prefix = 0;
489
490 if (*param == '$')
491 {
492 saw_prefix = 1;
493 param++;
494 }
495
496 if (arg == A_H) /* Channel */
497 {
498 if ((param[0] == 'c' || param[0] == 'C')
499 && (param[1] == 'h' || param[1] == 'H')
500 && ISDIGIT (param[2]))
501 param += 2;
502 }
503 else if (arg == A_S) /* Special purpose register */
504 {
505 if ((param[0] == 's' || param[0] == 'S')
506 && (param[1] == 'p' || param[1] == 'P')
507 && ISDIGIT (param[2]))
508 param += 2;
509 }
510
511 if (ISDIGIT (*param))
512 {
513 regno = 0;
514 while (ISDIGIT (*param))
515 regno = regno * 10 + *param++ - '0';
516 }
517 else
518 {
519 struct reg_name *rn;
520 unsigned int i, n, l = 0;
521
522 if (arg == A_H) /* Channel */
523 {
524 rn = ch_reg_name;
525 n = sizeof (ch_reg_name) / sizeof (*ch_reg_name);
526 }
527 else if (arg == A_S) /* Special purpose register */
528 {
529 rn = sp_reg_name;
530 n = sizeof (sp_reg_name) / sizeof (*sp_reg_name);
531 }
532 else
533 {
534 rn = reg_name;
535 n = sizeof (reg_name) / sizeof (*reg_name);
536 }
537 regno = 128;
538 for (i = 0; i < n; i++)
539 if (rn[i].length > l
540 && 0 == strncasecmp (param, rn[i].name, rn[i].length))
541 {
542 l = rn[i].length;
543 regno = rn[i].regno;
544 }
545 param += l;
546 }
547
548 if (!use_dd2
549 && arg == A_H)
550 {
551 if (regno == 11)
552 as_bad (_("'SPU_RdEventMask' (channel 11) is only available in DD2.0 or higher."));
553 else if (regno == 12)
554 as_bad (_("'MFC_RdTagMask' (channel 12) is only available in DD2.0 or higher."));
555 }
556
557 if (regno < 128)
558 {
559 insn->opcode |= regno << arg_encode[arg].pos;
560 if ((!saw_prefix && syntax_reg == 1)
561 || (saw_prefix && syntax_reg == 2))
562 syntax_reg |= 4;
563 syntax_reg |= saw_prefix ? 1 : 2;
564 return param;
565 }
566
567 if (accept_expr)
568 {
569 char *save_ptr;
570 expressionS ex;
571 save_ptr = input_line_pointer;
572 input_line_pointer = (char *)param;
573 expression (&ex);
574 param = input_line_pointer;
575 input_line_pointer = save_ptr;
576 if (ex.X_op == O_register || ex.X_op == O_constant)
577 {
578 insn->opcode |= ex.X_add_number << arg_encode[arg].pos;
579 return param;
580 }
581 }
582 return 0;
583 }
584
585 static const char *
get_imm(const char * param,struct spu_insn * insn,int arg)586 get_imm (const char *param, struct spu_insn *insn, int arg)
587 {
588 int val;
589 char *save_ptr;
590 int low = 0, high = 0;
591 int reloc_i = insn->reloc_arg[0] >= 0 ? 1 : 0;
592
593 if (strncasecmp (param, "%lo(", 4) == 0)
594 {
595 param += 3;
596 low = 1;
597 as_warn (_("Using old style, %%lo(expr), please change to PPC style, expr@l."));
598 }
599 else if (strncasecmp (param, "%hi(", 4) == 0)
600 {
601 param += 3;
602 high = 1;
603 as_warn (_("Using old style, %%hi(expr), please change to PPC style, expr@h."));
604 }
605 else if (strncasecmp (param, "%pic(", 5) == 0)
606 {
607 /* Currently we expect %pic(expr) == expr, so do nothing here.
608 i.e. for code loaded at address 0 $toc will be 0. */
609 param += 4;
610 }
611
612 if (*param == '$')
613 {
614 /* Symbols can start with $, but if this symbol matches a register
615 name, it's probably a mistake. The only way to avoid this
616 warning is to rename the symbol. */
617 struct spu_insn tmp_insn;
618 const char *np = get_reg (param, &tmp_insn, arg, 0);
619
620 if (np)
621 syntax_error_param = np;
622 }
623
624 save_ptr = input_line_pointer;
625 input_line_pointer = (char *) param;
626 expression (&insn->exp[reloc_i]);
627 param = input_line_pointer;
628 input_line_pointer = save_ptr;
629
630 /* Similar to ppc_elf_suffix in tc-ppc.c. We have so few cases to
631 handle we do it inlined here. */
632 if (param[0] == '@' && !ISALNUM (param[2]) && param[2] != '@')
633 {
634 if (param[1] == 'h' || param[1] == 'H')
635 {
636 high = 1;
637 param += 2;
638 }
639 else if (param[1] == 'l' || param[1] == 'L')
640 {
641 low = 1;
642 param += 2;
643 }
644 }
645
646 if (insn->exp[reloc_i].X_op == O_constant)
647 {
648 val = insn->exp[reloc_i].X_add_number;
649
650 if (emulate_apuasm)
651 {
652 /* Convert the value to a format we expect. */
653 val <<= arg_encode[arg].rshift;
654 if (arg == A_U7A)
655 val = 173 - val;
656 else if (arg == A_U7B)
657 val = 155 - val;
658 }
659
660 if (high)
661 val = val >> 16;
662 else if (low)
663 val = val & 0xffff;
664
665 /* Warn about out of range expressions. */
666 {
667 int hi = arg_encode[arg].hi;
668 int lo = arg_encode[arg].lo;
669 int whi = arg_encode[arg].whi;
670 int wlo = arg_encode[arg].wlo;
671
672 if (hi > lo && (val < lo || val > hi))
673 as_fatal (_("Constant expression %d out of range, [%d, %d]."),
674 val, lo, hi);
675 else if (whi > wlo && (val < wlo || val > whi))
676 as_warn (_("Constant expression %d out of range, [%d, %d]."),
677 val, wlo, whi);
678 }
679
680 if (arg == A_U7A)
681 val = 173 - val;
682 else if (arg == A_U7B)
683 val = 155 - val;
684
685 /* Branch hints have a split encoding. Do the bottom part. */
686 if (arg == A_S11 || arg == A_S11I)
687 insn->opcode |= ((val >> 2) & 0x7f);
688
689 insn->opcode |= (((val >> arg_encode[arg].rshift)
690 & ((1 << arg_encode[arg].size) - 1))
691 << arg_encode[arg].pos);
692 }
693 else
694 {
695 insn->reloc_arg[reloc_i] = arg;
696 if (high)
697 insn->reloc[reloc_i] = BFD_RELOC_SPU_HI16;
698 else if (low)
699 insn->reloc[reloc_i] = BFD_RELOC_SPU_LO16;
700 else
701 insn->reloc[reloc_i] = arg_encode[arg].reloc;
702 }
703
704 return param;
705 }
706
707 const char *
md_atof(int type,char * litP,int * sizeP)708 md_atof (int type, char *litP, int *sizeP)
709 {
710 return ieee_md_atof (type, litP, sizeP, true);
711 }
712
713 #ifndef WORKING_DOT_WORD
714 int md_short_jump_size = 4;
715
716 void
md_create_short_jump(char * ptr,addressT from_addr ATTRIBUTE_UNUSED,addressT to_addr ATTRIBUTE_UNUSED,fragS * frag,symbolS * to_symbol)717 md_create_short_jump (char *ptr,
718 addressT from_addr ATTRIBUTE_UNUSED,
719 addressT to_addr ATTRIBUTE_UNUSED,
720 fragS *frag,
721 symbolS *to_symbol)
722 {
723 ptr[0] = (char) 0xc0;
724 ptr[1] = 0x00;
725 ptr[2] = 0x00;
726 ptr[3] = 0x00;
727 fix_new (frag,
728 ptr - frag->fr_literal,
729 4,
730 to_symbol,
731 (offsetT) 0,
732 0,
733 BFD_RELOC_SPU_PCREL16);
734 }
735
736 int md_long_jump_size = 4;
737
738 void
md_create_long_jump(char * ptr,addressT from_addr ATTRIBUTE_UNUSED,addressT to_addr ATTRIBUTE_UNUSED,fragS * frag,symbolS * to_symbol)739 md_create_long_jump (char *ptr,
740 addressT from_addr ATTRIBUTE_UNUSED,
741 addressT to_addr ATTRIBUTE_UNUSED,
742 fragS *frag,
743 symbolS *to_symbol)
744 {
745 ptr[0] = (char) 0xc0;
746 ptr[1] = 0x00;
747 ptr[2] = 0x00;
748 ptr[3] = 0x00;
749 fix_new (frag,
750 ptr - frag->fr_literal,
751 4,
752 to_symbol,
753 (offsetT) 0,
754 0,
755 BFD_RELOC_SPU_PCREL16);
756 }
757 #endif
758
759 /* Handle .brinfo <priority>,<lrlive>. */
760 static void
spu_brinfo(int ignore ATTRIBUTE_UNUSED)761 spu_brinfo (int ignore ATTRIBUTE_UNUSED)
762 {
763 addressT priority;
764 addressT lrlive;
765
766 priority = get_absolute_expression ();
767 SKIP_WHITESPACE ();
768
769 lrlive = 0;
770 if (*input_line_pointer == ',')
771 {
772 ++input_line_pointer;
773 lrlive = get_absolute_expression ();
774 }
775
776 if (priority > 0x1fff)
777 {
778 as_bad (_("invalid priority '%lu'"), (unsigned long) priority);
779 priority = 0;
780 }
781
782 if (lrlive > 7)
783 {
784 as_bad (_("invalid lrlive '%lu'"), (unsigned long) lrlive);
785 lrlive = 0;
786 }
787
788 brinfo = (lrlive << 13) | priority;
789 demand_empty_rest_of_line ();
790 }
791
792 /* Support @ppu on symbols referenced in .int/.long/.word/.quad. */
793 static void
spu_cons(int nbytes)794 spu_cons (int nbytes)
795 {
796 expressionS exp;
797
798 if (is_it_end_of_statement ())
799 {
800 demand_empty_rest_of_line ();
801 return;
802 }
803
804 do
805 {
806 char *save = input_line_pointer;
807
808 /* Use deferred_expression here so that an expression involving
809 a symbol that happens to be defined already as an spu symbol,
810 is not resolved. */
811 deferred_expression (&exp);
812 if ((exp.X_op == O_symbol
813 || exp.X_op == O_constant)
814 && strncasecmp (input_line_pointer, "@ppu", 4) == 0)
815 {
816 char *p = frag_more (nbytes);
817 enum bfd_reloc_code_real reloc;
818
819 /* Check for identifier@suffix+constant. */
820 input_line_pointer += 4;
821 if (*input_line_pointer == '-' || *input_line_pointer == '+')
822 {
823 expressionS new_exp;
824
825 save = input_line_pointer;
826 expression (&new_exp);
827 if (new_exp.X_op == O_constant)
828 exp.X_add_number += new_exp.X_add_number;
829 else
830 input_line_pointer = save;
831 }
832
833 reloc = nbytes == 4 ? BFD_RELOC_SPU_PPU32 : BFD_RELOC_SPU_PPU64;
834 fix_new_exp (frag_now, p - frag_now->fr_literal, nbytes,
835 &exp, 0, reloc);
836 }
837 else
838 {
839 /* Don't use deferred_expression for anything else.
840 deferred_expression won't evaulate dot at the point it is
841 used. */
842 input_line_pointer = save;
843 expression (&exp);
844 emit_expr (&exp, nbytes);
845 }
846 }
847 while (*input_line_pointer++ == ',');
848
849 /* Put terminator back into stream. */
850 input_line_pointer--;
851 demand_empty_rest_of_line ();
852 }
853
854 int
md_estimate_size_before_relax(fragS * fragP ATTRIBUTE_UNUSED,segT segment_type ATTRIBUTE_UNUSED)855 md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED,
856 segT segment_type ATTRIBUTE_UNUSED)
857 {
858 as_fatal (_("Relaxation should never occur"));
859 return -1;
860 }
861
862 /* If while processing a fixup, a reloc really needs to be created,
863 then it is done here. */
864
865 arelent *
tc_gen_reloc(asection * seg ATTRIBUTE_UNUSED,fixS * fixp)866 tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED, fixS *fixp)
867 {
868 arelent *reloc;
869 reloc = XNEW (arelent);
870 reloc->sym_ptr_ptr = XNEW (asymbol *);
871 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
872 reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
873 reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
874 if (reloc->howto == (reloc_howto_type *) NULL)
875 {
876 as_bad_where (fixp->fx_file, fixp->fx_line,
877 _("reloc %d not supported by object file format"),
878 (int) fixp->fx_r_type);
879 free (reloc->sym_ptr_ptr);
880 free (reloc);
881 return NULL;
882 }
883 reloc->addend = fixp->fx_addnumber;
884 return reloc;
885 }
886
887 /* Round up a section's size to the appropriate boundary. */
888
889 valueT
md_section_align(segT seg,valueT size)890 md_section_align (segT seg, valueT size)
891 {
892 int align = bfd_section_alignment (seg);
893 valueT mask = ((valueT) 1 << align) - 1;
894
895 return (size + mask) & ~mask;
896 }
897
898 /* Where a PC relative offset is calculated from. On the spu they
899 are calculated from the beginning of the branch instruction. */
900
901 long
md_pcrel_from(fixS * fixp)902 md_pcrel_from (fixS *fixp)
903 {
904 return fixp->fx_frag->fr_address + fixp->fx_where;
905 }
906
907 /* Fill in rs_align_code fragments. */
908
909 void
spu_handle_align(fragS * fragp)910 spu_handle_align (fragS *fragp)
911 {
912 static const unsigned char nop_pattern[8] = {
913 0x40, 0x20, 0x00, 0x00, /* even nop */
914 0x00, 0x20, 0x00, 0x00, /* odd nop */
915 };
916
917 int bytes;
918 char *p;
919
920 if (fragp->fr_type != rs_align_code)
921 return;
922
923 bytes = fragp->fr_next->fr_address - fragp->fr_address - fragp->fr_fix;
924 p = fragp->fr_literal + fragp->fr_fix;
925
926 if (bytes & 3)
927 {
928 int fix = bytes & 3;
929 memset (p, 0, fix);
930 p += fix;
931 bytes -= fix;
932 fragp->fr_fix += fix;
933 }
934 if (bytes & 4)
935 {
936 memcpy (p, &nop_pattern[4], 4);
937 p += 4;
938 bytes -= 4;
939 fragp->fr_fix += 4;
940 }
941
942 memcpy (p, nop_pattern, 8);
943 fragp->fr_var = 8;
944 }
945
946 void
md_apply_fix(fixS * fixP,valueT * valP,segT seg ATTRIBUTE_UNUSED)947 md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED)
948 {
949 unsigned int res;
950 unsigned int mask;
951 valueT val = *valP;
952 char *place = fixP->fx_where + fixP->fx_frag->fr_literal;
953
954 if (fixP->fx_subsy != (symbolS *) NULL)
955 {
956 /* We can't actually support subtracting a symbol. */
957 as_bad_subtract (fixP);
958 }
959
960 if (fixP->fx_addsy != NULL)
961 {
962 if (fixP->fx_pcrel)
963 {
964 /* Hack around bfd_install_relocation brain damage. */
965 val += fixP->fx_frag->fr_address + fixP->fx_where;
966
967 switch (fixP->fx_r_type)
968 {
969 case BFD_RELOC_32:
970 fixP->fx_r_type = BFD_RELOC_32_PCREL;
971 break;
972
973 case BFD_RELOC_SPU_PCREL16:
974 case BFD_RELOC_SPU_PCREL9a:
975 case BFD_RELOC_SPU_PCREL9b:
976 case BFD_RELOC_32_PCREL:
977 break;
978
979 default:
980 as_bad_where (fixP->fx_file, fixP->fx_line,
981 _("expression too complex"));
982 break;
983 }
984 }
985 }
986
987 fixP->fx_addnumber = val;
988
989 if (fixP->fx_r_type == BFD_RELOC_SPU_PPU32
990 || fixP->fx_r_type == BFD_RELOC_SPU_PPU64
991 || fixP->fx_r_type == BFD_RELOC_SPU_ADD_PIC)
992 return;
993
994 if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
995 {
996 fixP->fx_done = 1;
997 res = 0;
998 mask = 0;
999 if (fixP->tc_fix_data.arg_format > A_P)
1000 {
1001 int hi = arg_encode[fixP->tc_fix_data.arg_format].hi;
1002 int lo = arg_encode[fixP->tc_fix_data.arg_format].lo;
1003 if (hi > lo && ((offsetT) val < lo || (offsetT) val > hi))
1004 as_bad_where (fixP->fx_file, fixP->fx_line,
1005 _("Relocation doesn't fit. (relocation value = 0x%lx)"),
1006 (long) val);
1007 }
1008
1009 switch (fixP->fx_r_type)
1010 {
1011 case BFD_RELOC_8:
1012 md_number_to_chars (place, val, 1);
1013 return;
1014
1015 case BFD_RELOC_16:
1016 md_number_to_chars (place, val, 2);
1017 return;
1018
1019 case BFD_RELOC_32:
1020 case BFD_RELOC_32_PCREL:
1021 md_number_to_chars (place, val, 4);
1022 return;
1023
1024 case BFD_RELOC_64:
1025 md_number_to_chars (place, val, 8);
1026 return;
1027
1028 case BFD_RELOC_SPU_IMM7:
1029 res = val << 14;
1030 mask = 0x7f << 14;
1031 break;
1032
1033 case BFD_RELOC_SPU_IMM8:
1034 res = val << 14;
1035 mask = 0xff << 14;
1036 break;
1037
1038 case BFD_RELOC_SPU_IMM10:
1039 res = val << 14;
1040 mask = 0x3ff << 14;
1041 break;
1042
1043 case BFD_RELOC_SPU_IMM10W:
1044 res = val << 10;
1045 mask = 0x3ff0 << 10;
1046 break;
1047
1048 case BFD_RELOC_SPU_IMM16:
1049 res = val << 7;
1050 mask = 0xffff << 7;
1051 break;
1052
1053 case BFD_RELOC_SPU_IMM16W:
1054 res = val << 5;
1055 mask = 0x3fffc << 5;
1056 break;
1057
1058 case BFD_RELOC_SPU_IMM18:
1059 res = val << 7;
1060 mask = 0x3ffff << 7;
1061 break;
1062
1063 case BFD_RELOC_SPU_PCREL9a:
1064 res = ((val & 0x1fc) >> 2) | ((val & 0x600) << 14);
1065 mask = (0x1fc >> 2) | (0x600 << 14);
1066 break;
1067
1068 case BFD_RELOC_SPU_PCREL9b:
1069 res = ((val & 0x1fc) >> 2) | ((val & 0x600) << 5);
1070 mask = (0x1fc >> 2) | (0x600 << 5);
1071 break;
1072
1073 case BFD_RELOC_SPU_PCREL16:
1074 res = val << 5;
1075 mask = 0x3fffc << 5;
1076 break;
1077
1078 case BFD_RELOC_SPU_HI16:
1079 res = val >> 9;
1080 mask = 0xffff << 7;
1081 break;
1082
1083 case BFD_RELOC_SPU_LO16:
1084 res = val << 7;
1085 mask = 0xffff << 7;
1086 break;
1087
1088 default:
1089 as_bad_where (fixP->fx_file, fixP->fx_line,
1090 _("reloc %d not supported by object file format"),
1091 (int) fixP->fx_r_type);
1092 }
1093
1094 res &= mask;
1095 place[0] = (place[0] & (~mask >> 24)) | ((res >> 24) & 0xff);
1096 place[1] = (place[1] & (~mask >> 16)) | ((res >> 16) & 0xff);
1097 place[2] = (place[2] & (~mask >> 8)) | ((res >> 8) & 0xff);
1098 place[3] = (place[3] & ~mask) | (res & 0xff);
1099 }
1100 }
1101