| 1 | /* This is the machine dependent code of the Visium Assembler. |
| 2 | |
| 3 | Copyright (C) 2005-2016 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 2, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GAS is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GAS; see the file COPYING. If not, write to |
| 19 | the Free Software Foundation, 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | #include "as.h" |
| 23 | #include "safe-ctype.h" |
| 24 | #include "subsegs.h" |
| 25 | #include "obstack.h" |
| 26 | |
| 27 | #include "opcode/visium.h" |
| 28 | #include "elf/visium.h" |
| 29 | #include "dwarf2dbg.h" |
| 30 | #include "dw2gencfi.h" |
| 31 | |
| 32 | /* Relocations and fixups: |
| 33 | |
| 34 | There are two different cases where an instruction or data |
| 35 | directive operand requires relocation, or fixup. |
| 36 | |
| 37 | 1. Relative branch instructions, take an 16-bit signed word |
| 38 | offset. The formula for computing the offset is this: |
| 39 | |
| 40 | offset = (destination - pc) / 4 |
| 41 | |
| 42 | Branch instructions never branch to a label not declared |
| 43 | locally, so the actual offset can always be computed by the assembler. |
| 44 | However, we provide a relocation type to support this. |
| 45 | |
| 46 | 2. Load literal instructions, such as MOVIU, which take a 16-bit |
| 47 | literal operand. The literal may be the top or bottom half of |
| 48 | a 32-bit value computed by the assembler, or by the linker. We provide |
| 49 | two relocation types here. |
| 50 | |
| 51 | 3. Data items (long, word and byte) preset with a value computed by |
| 52 | the linker. */ |
| 53 | |
| 54 | |
| 55 | /* This string holds the chars that always start a comment. If the |
| 56 | pre-processor is disabled, these aren't very useful. The macro |
| 57 | tc_comment_chars points to this. */ |
| 58 | const char *visium_comment_chars = "!;"; |
| 59 | |
| 60 | /* This array holds the chars that only start a comment at the beginning |
| 61 | of a line. If the line seems to have the form '# 123 filename' .line |
| 62 | and .file directives will appear in the pre-processed output. Note that |
| 63 | input_file.c hand checks for '#' at the beginning of the first line of |
| 64 | the input file. This is because the compiler outputs #NO_APP at the |
| 65 | beginning of its output. Also note that comments like this one will |
| 66 | always work. */ |
| 67 | const char line_comment_chars[] = "#!;"; |
| 68 | const char line_separator_chars[] = ""; |
| 69 | |
| 70 | /* Chars that can be used to separate mantissa from exponent in floating point |
| 71 | numbers. */ |
| 72 | const char EXP_CHARS[] = "eE"; |
| 73 | |
| 74 | /* Chars that mean this number is a floating point constant, as in |
| 75 | "0f12.456" or "0d1.2345e12". |
| 76 | |
| 77 | ...Also be aware that MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT may have to be |
| 78 | changed in read.c. Ideally it shouldn't have to know about it at all, |
| 79 | but nothing is ideal around here. */ |
| 80 | const char FLT_CHARS[] = "rRsSfFdDxXeE"; |
| 81 | |
| 82 | /* The size of a relocation record. */ |
| 83 | const int md_reloc_size = 8; |
| 84 | |
| 85 | /* The architecture for which we are assembling. */ |
| 86 | enum visium_arch_val |
| 87 | { |
| 88 | VISIUM_ARCH_DEF, |
| 89 | VISIUM_ARCH_MCM24, |
| 90 | VISIUM_ARCH_MCM, |
| 91 | VISIUM_ARCH_GR6 |
| 92 | }; |
| 93 | |
| 94 | static enum visium_arch_val visium_arch = VISIUM_ARCH_DEF; |
| 95 | |
| 96 | /* The opcode architecture for which we are assembling. In contrast to the |
| 97 | previous one, this only determines which instructions are supported. */ |
| 98 | static enum visium_opcode_arch_val visium_opcode_arch = VISIUM_OPCODE_ARCH_DEF; |
| 99 | |
| 100 | /* Flags to set in the ELF header e_flags field. */ |
| 101 | static flagword visium_flags = 0; |
| 102 | |
| 103 | /* More than this number of nops in an alignment op gets a branch instead. */ |
| 104 | static unsigned int nop_limit = 5; |
| 105 | |
| 106 | |
| 107 | /* Translate internal representation of relocation info to BFD target |
| 108 | format. */ |
| 109 | arelent * |
| 110 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp) |
| 111 | { |
| 112 | arelent *reloc; |
| 113 | bfd_reloc_code_real_type code; |
| 114 | |
| 115 | reloc = XNEW (arelent); |
| 116 | |
| 117 | reloc->sym_ptr_ptr = XNEW (asymbol *); |
| 118 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
| 119 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; |
| 120 | |
| 121 | switch (fixp->fx_r_type) |
| 122 | { |
| 123 | case BFD_RELOC_8: |
| 124 | case BFD_RELOC_16: |
| 125 | case BFD_RELOC_32: |
| 126 | case BFD_RELOC_8_PCREL: |
| 127 | case BFD_RELOC_16_PCREL: |
| 128 | case BFD_RELOC_32_PCREL: |
| 129 | case BFD_RELOC_VISIUM_HI16: |
| 130 | case BFD_RELOC_VISIUM_LO16: |
| 131 | case BFD_RELOC_VISIUM_IM16: |
| 132 | case BFD_RELOC_VISIUM_REL16: |
| 133 | case BFD_RELOC_VISIUM_HI16_PCREL: |
| 134 | case BFD_RELOC_VISIUM_LO16_PCREL: |
| 135 | case BFD_RELOC_VISIUM_IM16_PCREL: |
| 136 | case BFD_RELOC_VTABLE_INHERIT: |
| 137 | case BFD_RELOC_VTABLE_ENTRY: |
| 138 | code = fixp->fx_r_type; |
| 139 | break; |
| 140 | default: |
| 141 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 142 | "internal error: unknown relocation type %d (`%s')", |
| 143 | fixp->fx_r_type, |
| 144 | bfd_get_reloc_code_name (fixp->fx_r_type)); |
| 145 | return 0; |
| 146 | } |
| 147 | |
| 148 | reloc->howto = bfd_reloc_type_lookup (stdoutput, code); |
| 149 | if (reloc->howto == 0) |
| 150 | { |
| 151 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 152 | "internal error: can't export reloc type %d (`%s')", |
| 153 | fixp->fx_r_type, bfd_get_reloc_code_name (code)); |
| 154 | return 0; |
| 155 | } |
| 156 | |
| 157 | /* Write the addend. */ |
| 158 | if (reloc->howto->pc_relative == 0) |
| 159 | reloc->addend = fixp->fx_addnumber; |
| 160 | else |
| 161 | reloc->addend = fixp->fx_offset; |
| 162 | |
| 163 | return reloc; |
| 164 | } |
| 165 | |
| 166 | extern char *input_line_pointer; |
| 167 | |
| 168 | |
| 169 | static void s_bss (int); |
| 170 | static void visium_rdata (int); |
| 171 | |
| 172 | static void visium_update_parity_bit (char *); |
| 173 | static char *parse_exp (char *, expressionS *); |
| 174 | |
| 175 | /* These are the back-ends for the various machine dependent pseudo-ops. */ |
| 176 | void demand_empty_rest_of_line (void); |
| 177 | |
| 178 | |
| 179 | static void |
| 180 | s_bss (int ignore ATTRIBUTE_UNUSED) |
| 181 | { |
| 182 | /* We don't support putting frags in the BSS segment, we fake it |
| 183 | by marking in_bss, then looking at s_skip for clues. */ |
| 184 | |
| 185 | subseg_set (bss_section, 0); |
| 186 | demand_empty_rest_of_line (); |
| 187 | } |
| 188 | |
| 189 | |
| 190 | /* This table describes all the machine specific pseudo-ops the assembler |
| 191 | has to support. The fields are: |
| 192 | |
| 193 | 1: Pseudo-op name without dot. |
| 194 | 2: Function to call to execute this pseudo-op. |
| 195 | 3: Integer arg to pass to the function. */ |
| 196 | const pseudo_typeS md_pseudo_table[] = |
| 197 | { |
| 198 | {"bss", s_bss, 0}, |
| 199 | {"skip", s_space, 0}, |
| 200 | {"align", s_align_bytes, 0}, |
| 201 | {"noopt", s_ignore, 0}, |
| 202 | {"optim", s_ignore, 0}, |
| 203 | {"rdata", visium_rdata, 0}, |
| 204 | {"rodata", visium_rdata, 0}, |
| 205 | {0, 0, 0} |
| 206 | }; |
| 207 | |
| 208 | |
| 209 | static void |
| 210 | visium_rdata (int xxx) |
| 211 | { |
| 212 | char *save_line = input_line_pointer; |
| 213 | static char section[] = ".rodata\n"; |
| 214 | |
| 215 | /* Just pretend this is .section .rodata */ |
| 216 | input_line_pointer = section; |
| 217 | obj_elf_section (xxx); |
| 218 | input_line_pointer = save_line; |
| 219 | } |
| 220 | |
| 221 | /* Align a section. */ |
| 222 | valueT |
| 223 | md_section_align (asection *seg, valueT addr) |
| 224 | { |
| 225 | int align = bfd_get_section_alignment (stdoutput, seg); |
| 226 | |
| 227 | return ((addr + (1 << align) - 1) & -(1 << align)); |
| 228 | } |
| 229 | |
| 230 | void |
| 231 | md_number_to_chars (char *buf, valueT val, int n) |
| 232 | { |
| 233 | number_to_chars_bigendian (buf, val, n); |
| 234 | } |
| 235 | |
| 236 | symbolS * |
| 237 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) |
| 238 | { |
| 239 | return 0; |
| 240 | } |
| 241 | |
| 242 | /* The parse options. */ |
| 243 | const char *md_shortopts = "m:"; |
| 244 | |
| 245 | struct option md_longopts[] = |
| 246 | { |
| 247 | {NULL, no_argument, NULL, 0} |
| 248 | }; |
| 249 | |
| 250 | size_t md_longopts_size = sizeof (md_longopts); |
| 251 | |
| 252 | struct visium_option_table |
| 253 | { |
| 254 | char *option; /* Option name to match. */ |
| 255 | char *help; /* Help information. */ |
| 256 | int *var; /* Variable to change. */ |
| 257 | int value; /* To what to change it. */ |
| 258 | char *deprecated; /* If non-null, print this message. */ |
| 259 | }; |
| 260 | |
| 261 | static struct visium_option_table visium_opts[] = |
| 262 | { |
| 263 | {NULL, NULL, NULL, 0, NULL} |
| 264 | }; |
| 265 | |
| 266 | struct visium_arch_option_table |
| 267 | { |
| 268 | const char *name; |
| 269 | enum visium_arch_val value; |
| 270 | }; |
| 271 | |
| 272 | static struct visium_arch_option_table visium_archs[] = |
| 273 | { |
| 274 | {"mcm24", VISIUM_ARCH_MCM24}, |
| 275 | {"mcm", VISIUM_ARCH_MCM}, |
| 276 | {"gr5", VISIUM_ARCH_MCM}, |
| 277 | {"gr6", VISIUM_ARCH_GR6}, |
| 278 | {NULL, 0} |
| 279 | }; |
| 280 | |
| 281 | struct visium_long_option_table |
| 282 | { |
| 283 | const char *option; /* Substring to match. */ |
| 284 | const char *help; /* Help information. */ |
| 285 | int (*func) (const char *subopt); /* Function to decode sub-option. */ |
| 286 | const char *deprecated; /* If non-null, print this message. */ |
| 287 | }; |
| 288 | |
| 289 | static int |
| 290 | visium_parse_arch (const char *str) |
| 291 | { |
| 292 | struct visium_arch_option_table *opt; |
| 293 | |
| 294 | if (strlen (str) == 0) |
| 295 | { |
| 296 | as_bad ("missing architecture name `%s'", str); |
| 297 | return 0; |
| 298 | } |
| 299 | |
| 300 | |
| 301 | for (opt = visium_archs; opt->name != NULL; opt++) |
| 302 | if (strcmp (opt->name, str) == 0) |
| 303 | { |
| 304 | visium_arch = opt->value; |
| 305 | return 1; |
| 306 | } |
| 307 | |
| 308 | as_bad ("unknown architecture `%s'\n", str); |
| 309 | return 0; |
| 310 | } |
| 311 | |
| 312 | static struct visium_long_option_table visium_long_opts[] = |
| 313 | { |
| 314 | {"mtune=", "<arch_name>\t assemble for architecture <arch name>", |
| 315 | visium_parse_arch, NULL}, |
| 316 | {NULL, NULL, NULL, NULL} |
| 317 | }; |
| 318 | |
| 319 | int |
| 320 | md_parse_option (int c, const char *arg) |
| 321 | { |
| 322 | struct visium_option_table *opt; |
| 323 | struct visium_long_option_table *lopt; |
| 324 | |
| 325 | switch (c) |
| 326 | { |
| 327 | case 'a': |
| 328 | /* Listing option. Just ignore these, we don't support additional |
| 329 | ones. */ |
| 330 | return 0; |
| 331 | |
| 332 | default: |
| 333 | for (opt = visium_opts; opt->option != NULL; opt++) |
| 334 | { |
| 335 | if (c == opt->option[0] |
| 336 | && ((arg == NULL && opt->option[1] == 0) |
| 337 | || strcmp (arg, opt->option + 1) == 0)) |
| 338 | { |
| 339 | /* If the option is deprecated, tell the user. */ |
| 340 | if (opt->deprecated != NULL) |
| 341 | as_tsktsk ("option `-%c%s' is deprecated: %s", c, |
| 342 | arg ? arg : "", opt->deprecated); |
| 343 | |
| 344 | if (opt->var != NULL) |
| 345 | *opt->var = opt->value; |
| 346 | |
| 347 | return 1; |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | for (lopt = visium_long_opts; lopt->option != NULL; lopt++) |
| 352 | { |
| 353 | /* These options are expected to have an argument. */ |
| 354 | if (c == lopt->option[0] |
| 355 | && arg != NULL |
| 356 | && strncmp (arg, lopt->option + 1, |
| 357 | strlen (lopt->option + 1)) == 0) |
| 358 | { |
| 359 | /* If the option is deprecated, tell the user. */ |
| 360 | if (lopt->deprecated != NULL) |
| 361 | as_tsktsk ("option `-%c%s' is deprecated: %s", c, arg, |
| 362 | lopt->deprecated); |
| 363 | |
| 364 | /* Call the sup-option parser. */ |
| 365 | return lopt->func (arg + strlen (lopt->option) - 1); |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | return 0; |
| 370 | } |
| 371 | |
| 372 | return 1; |
| 373 | } |
| 374 | |
| 375 | void |
| 376 | md_show_usage (FILE * fp) |
| 377 | { |
| 378 | struct visium_option_table *opt; |
| 379 | struct visium_long_option_table *lopt; |
| 380 | |
| 381 | fprintf (fp, " Visium-specific assembler options:\n"); |
| 382 | |
| 383 | for (opt = visium_opts; opt->option != NULL; opt++) |
| 384 | if (opt->help != NULL) |
| 385 | fprintf (fp, " -%-23s%s\n", opt->option, opt->help); |
| 386 | |
| 387 | for (lopt = visium_long_opts; lopt->option != NULL; lopt++) |
| 388 | if (lopt->help != NULL) |
| 389 | fprintf (fp, " -%s%s\n", lopt->option, lopt->help); |
| 390 | |
| 391 | } |
| 392 | |
| 393 | /* Interface to relax_segment. */ |
| 394 | |
| 395 | /* Return the estimate of the size of a machine dependent frag |
| 396 | before any relaxing is done. It may also create any necessary |
| 397 | relocations. */ |
| 398 | int |
| 399 | md_estimate_size_before_relax (fragS * fragP, |
| 400 | segT segment ATTRIBUTE_UNUSED) |
| 401 | { |
| 402 | fragP->fr_var = 4; |
| 403 | return 4; |
| 404 | } |
| 405 | |
| 406 | /* Get the address of a symbol during relaxation. From tc-arm.c. */ |
| 407 | static addressT |
| 408 | relaxed_symbol_addr (fragS *fragp, long stretch) |
| 409 | { |
| 410 | fragS *sym_frag; |
| 411 | addressT addr; |
| 412 | symbolS *sym; |
| 413 | |
| 414 | sym = fragp->fr_symbol; |
| 415 | sym_frag = symbol_get_frag (sym); |
| 416 | know (S_GET_SEGMENT (sym) != absolute_section |
| 417 | || sym_frag == &zero_address_frag); |
| 418 | addr = S_GET_VALUE (sym) + fragp->fr_offset; |
| 419 | |
| 420 | /* If frag has yet to be reached on this pass, assume it will |
| 421 | move by STRETCH just as we did. If this is not so, it will |
| 422 | be because some frag between grows, and that will force |
| 423 | another pass. */ |
| 424 | if (stretch != 0 |
| 425 | && sym_frag->relax_marker != fragp->relax_marker) |
| 426 | { |
| 427 | fragS *f; |
| 428 | |
| 429 | /* Adjust stretch for any alignment frag. Note that if have |
| 430 | been expanding the earlier code, the symbol may be |
| 431 | defined in what appears to be an earlier frag. FIXME: |
| 432 | This doesn't handle the fr_subtype field, which specifies |
| 433 | a maximum number of bytes to skip when doing an |
| 434 | alignment. */ |
| 435 | for (f = fragp; f != NULL && f != sym_frag; f = f->fr_next) |
| 436 | { |
| 437 | if (f->fr_type == rs_align || f->fr_type == rs_align_code) |
| 438 | { |
| 439 | if (stretch < 0) |
| 440 | stretch = - ((- stretch) |
| 441 | & ~ ((1 << (int) f->fr_offset) - 1)); |
| 442 | else |
| 443 | stretch &= ~ ((1 << (int) f->fr_offset) - 1); |
| 444 | if (stretch == 0) |
| 445 | break; |
| 446 | } |
| 447 | } |
| 448 | if (f != NULL) |
| 449 | addr += stretch; |
| 450 | } |
| 451 | |
| 452 | return addr; |
| 453 | } |
| 454 | |
| 455 | /* Relax a machine dependent frag. This returns the amount by which |
| 456 | the current size of the frag should change. */ |
| 457 | int |
| 458 | visium_relax_frag (asection *sec, fragS *fragP, long stretch) |
| 459 | { |
| 460 | int old_size, new_size; |
| 461 | addressT addr; |
| 462 | |
| 463 | /* We only handle relaxation for the BRR instruction. */ |
| 464 | gas_assert (fragP->fr_subtype == mode_ci); |
| 465 | |
| 466 | if (!S_IS_DEFINED (fragP->fr_symbol) |
| 467 | || sec != S_GET_SEGMENT (fragP->fr_symbol) |
| 468 | || S_IS_WEAK (fragP->fr_symbol)) |
| 469 | return 0; |
| 470 | |
| 471 | old_size = fragP->fr_var; |
| 472 | addr = relaxed_symbol_addr (fragP, stretch); |
| 473 | |
| 474 | /* If the target is the address of the instruction, we'll insert a NOP. */ |
| 475 | if (addr == fragP->fr_address + fragP->fr_fix) |
| 476 | new_size = 8; |
| 477 | else |
| 478 | new_size = 4; |
| 479 | |
| 480 | fragP->fr_var = new_size; |
| 481 | return new_size - old_size; |
| 482 | } |
| 483 | |
| 484 | /* Convert a machine dependent frag. */ |
| 485 | void |
| 486 | md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, segT sec ATTRIBUTE_UNUSED, |
| 487 | fragS * fragP) |
| 488 | { |
| 489 | char *buf = fragP->fr_literal + fragP->fr_fix; |
| 490 | expressionS exp; |
| 491 | fixS *fixP; |
| 492 | |
| 493 | /* We only handle relaxation for the BRR instruction. */ |
| 494 | gas_assert (fragP->fr_subtype == mode_ci); |
| 495 | |
| 496 | /* Insert the NOP if requested. */ |
| 497 | if (fragP->fr_var == 8) |
| 498 | { |
| 499 | memcpy (buf + 4, buf, 4); |
| 500 | memset (buf, 0, 4); |
| 501 | fragP->fr_fix += 4; |
| 502 | } |
| 503 | |
| 504 | exp.X_op = O_symbol; |
| 505 | exp.X_add_symbol = fragP->fr_symbol; |
| 506 | exp.X_add_number = fragP->fr_offset; |
| 507 | |
| 508 | /* Now we can create the relocation at the correct offset. */ |
| 509 | fixP = fix_new_exp (fragP, fragP->fr_fix, 4, &exp, 1, BFD_RELOC_VISIUM_REL16); |
| 510 | fixP->fx_file = fragP->fr_file; |
| 511 | fixP->fx_line = fragP->fr_line; |
| 512 | fragP->fr_fix += 4; |
| 513 | fragP->fr_var = 0; |
| 514 | } |
| 515 | |
| 516 | /* The location from which a PC relative jump should be calculated, |
| 517 | given a PC relative jump reloc. */ |
| 518 | long |
| 519 | visium_pcrel_from_section (fixS *fixP, segT sec) |
| 520 | { |
| 521 | if (fixP->fx_addsy != (symbolS *) NULL |
| 522 | && (!S_IS_DEFINED (fixP->fx_addsy) |
| 523 | || S_GET_SEGMENT (fixP->fx_addsy) != sec)) |
| 524 | { |
| 525 | /* The symbol is undefined (or is defined but not in this section). |
| 526 | Let the linker figure it out. */ |
| 527 | return 0; |
| 528 | } |
| 529 | |
| 530 | /* Return the address of the instruction. */ |
| 531 | return fixP->fx_where + fixP->fx_frag->fr_address; |
| 532 | } |
| 533 | |
| 534 | /* Indicate whether a fixup against a locally defined |
| 535 | symbol should be adjusted to be against the section |
| 536 | symbol. */ |
| 537 | bfd_boolean |
| 538 | visium_fix_adjustable (fixS *fix) |
| 539 | { |
| 540 | /* We need the symbol name for the VTABLE entries. */ |
| 541 | return (fix->fx_r_type != BFD_RELOC_VTABLE_INHERIT |
| 542 | && fix->fx_r_type != BFD_RELOC_VTABLE_ENTRY); |
| 543 | } |
| 544 | |
| 545 | /* Update the parity bit of the 4-byte instruction in BUF. */ |
| 546 | static void |
| 547 | visium_update_parity_bit (char *buf) |
| 548 | { |
| 549 | int p1 = (buf[0] & 0x7f) ^ buf[1] ^ buf[2] ^ buf[3]; |
| 550 | int p2 = 0; |
| 551 | int i; |
| 552 | |
| 553 | for (i = 1; i <= 8; i++) |
| 554 | { |
| 555 | p2 ^= (p1 & 1); |
| 556 | p1 >>= 1; |
| 557 | } |
| 558 | |
| 559 | buf[0] = (buf[0] & 0x7f) | ((p2 << 7) & 0x80); |
| 560 | } |
| 561 | |
| 562 | /* This is called from HANDLE_ALIGN in write.c. Fill in the contents |
| 563 | of an rs_align_code fragment. */ |
| 564 | void |
| 565 | visium_handle_align (fragS *fragP) |
| 566 | { |
| 567 | valueT count |
| 568 | = fragP->fr_next->fr_address - (fragP->fr_address + fragP->fr_fix); |
| 569 | valueT fix = count & 3; |
| 570 | char *p = fragP->fr_literal + fragP->fr_fix; |
| 571 | |
| 572 | if (fix) |
| 573 | { |
| 574 | memset (p, 0, fix); |
| 575 | p += fix; |
| 576 | count -= fix; |
| 577 | fragP->fr_fix += fix; |
| 578 | } |
| 579 | |
| 580 | if (count == 0) |
| 581 | return; |
| 582 | |
| 583 | fragP->fr_var = 4; |
| 584 | |
| 585 | if (count > 4 * nop_limit && count <= 131068) |
| 586 | { |
| 587 | struct frag *rest; |
| 588 | |
| 589 | /* Make a branch, then follow with nops. Insert another |
| 590 | frag to handle the nops. */ |
| 591 | md_number_to_chars (p, 0x78000000 + (count >> 2), 4); |
| 592 | visium_update_parity_bit (p); |
| 593 | |
| 594 | rest = xmalloc (SIZEOF_STRUCT_FRAG + 4); |
| 595 | memcpy (rest, fragP, SIZEOF_STRUCT_FRAG); |
| 596 | fragP->fr_next = rest; |
| 597 | rest->fr_address += rest->fr_fix + 4; |
| 598 | rest->fr_fix = 0; |
| 599 | /* If we leave the next frag as rs_align_code we'll come here |
| 600 | again, resulting in a bunch of branches rather than a |
| 601 | branch followed by nops. */ |
| 602 | rest->fr_type = rs_align; |
| 603 | p = rest->fr_literal; |
| 604 | } |
| 605 | |
| 606 | memset (p, 0, 4); |
| 607 | } |
| 608 | |
| 609 | /* Apply a fixS to the frags, now that we know the value it ought to |
| 610 | hold. */ |
| 611 | void |
| 612 | md_apply_fix (fixS * fixP, valueT * value, segT segment) |
| 613 | { |
| 614 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; |
| 615 | offsetT val; |
| 616 | long insn; |
| 617 | |
| 618 | val = *value; |
| 619 | |
| 620 | gas_assert (fixP->fx_r_type < BFD_RELOC_UNUSED); |
| 621 | |
| 622 | /* Remember value for tc_gen_reloc. */ |
| 623 | fixP->fx_addnumber = val; |
| 624 | |
| 625 | /* Since DIFF_EXPR_OK is defined, .-foo gets turned into PC |
| 626 | relative relocs. If this has happened, a non-PC relative |
| 627 | reloc must be reinstalled with its PC relative version here. */ |
| 628 | if (fixP->fx_pcrel) |
| 629 | { |
| 630 | switch (fixP->fx_r_type) |
| 631 | { |
| 632 | case BFD_RELOC_8: |
| 633 | fixP->fx_r_type = BFD_RELOC_8_PCREL; |
| 634 | break; |
| 635 | case BFD_RELOC_16: |
| 636 | fixP->fx_r_type = BFD_RELOC_16_PCREL; |
| 637 | break; |
| 638 | case BFD_RELOC_32: |
| 639 | fixP->fx_r_type = BFD_RELOC_32_PCREL; |
| 640 | break; |
| 641 | case BFD_RELOC_VISIUM_HI16: |
| 642 | fixP->fx_r_type = BFD_RELOC_VISIUM_HI16_PCREL; |
| 643 | break; |
| 644 | case BFD_RELOC_VISIUM_LO16: |
| 645 | fixP->fx_r_type = BFD_RELOC_VISIUM_LO16_PCREL; |
| 646 | break; |
| 647 | case BFD_RELOC_VISIUM_IM16: |
| 648 | fixP->fx_r_type = BFD_RELOC_VISIUM_IM16_PCREL; |
| 649 | break; |
| 650 | default: |
| 651 | break; |
| 652 | } |
| 653 | } |
| 654 | |
| 655 | /* If this is a data relocation, just output VAL. */ |
| 656 | switch (fixP->fx_r_type) |
| 657 | { |
| 658 | case BFD_RELOC_8: |
| 659 | case BFD_RELOC_8_PCREL: |
| 660 | md_number_to_chars (buf, val, 1); |
| 661 | break; |
| 662 | case BFD_RELOC_16: |
| 663 | case BFD_RELOC_16_PCREL: |
| 664 | md_number_to_chars (buf, val, 2); |
| 665 | break; |
| 666 | case BFD_RELOC_32: |
| 667 | case BFD_RELOC_32_PCREL: |
| 668 | md_number_to_chars (buf, val, 4); |
| 669 | break; |
| 670 | case BFD_RELOC_VTABLE_INHERIT: |
| 671 | case BFD_RELOC_VTABLE_ENTRY: |
| 672 | fixP->fx_done = 0; |
| 673 | break; |
| 674 | default: |
| 675 | /* It's a relocation against an instruction. */ |
| 676 | insn = bfd_getb32 ((unsigned char *) buf); |
| 677 | |
| 678 | switch (fixP->fx_r_type) |
| 679 | { |
| 680 | case BFD_RELOC_VISIUM_REL16: |
| 681 | if (fixP->fx_addsy == NULL |
| 682 | || (S_IS_DEFINED (fixP->fx_addsy) |
| 683 | && S_GET_SEGMENT (fixP->fx_addsy) == segment)) |
| 684 | { |
| 685 | if (val > 0x1fffc || val < -0x20000) |
| 686 | as_bad_where |
| 687 | (fixP->fx_file, fixP->fx_line, |
| 688 | "16-bit word displacement out of range: value = %d", |
| 689 | (int) val); |
| 690 | val = (val >> 2); |
| 691 | |
| 692 | insn = (insn & 0xffff0000) | (val & 0x0000ffff); |
| 693 | } |
| 694 | break; |
| 695 | |
| 696 | case BFD_RELOC_VISIUM_HI16: |
| 697 | case BFD_RELOC_VISIUM_HI16_PCREL: |
| 698 | if (fixP->fx_addsy == NULL) |
| 699 | insn = (insn & 0xffff0000) | ((val >> 16) & 0x0000ffff); |
| 700 | break; |
| 701 | |
| 702 | case BFD_RELOC_VISIUM_LO16: |
| 703 | case BFD_RELOC_VISIUM_LO16_PCREL: |
| 704 | if (fixP->fx_addsy == NULL) |
| 705 | insn = (insn & 0xffff0000) | (val & 0x0000ffff); |
| 706 | break; |
| 707 | |
| 708 | case BFD_RELOC_VISIUM_IM16: |
| 709 | case BFD_RELOC_VISIUM_IM16_PCREL: |
| 710 | if (fixP->fx_addsy == NULL) |
| 711 | { |
| 712 | if ((val & 0xffff0000) != 0) |
| 713 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 714 | "16-bit immediate out of range: value = %d", |
| 715 | (int) val); |
| 716 | |
| 717 | insn = (insn & 0xffff0000) | val; |
| 718 | } |
| 719 | break; |
| 720 | |
| 721 | case BFD_RELOC_NONE: |
| 722 | default: |
| 723 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 724 | "bad or unhandled relocation type: 0x%02x", |
| 725 | fixP->fx_r_type); |
| 726 | break; |
| 727 | } |
| 728 | |
| 729 | bfd_putb32 (insn, (unsigned char *) buf); |
| 730 | visium_update_parity_bit (buf); |
| 731 | break; |
| 732 | } |
| 733 | |
| 734 | /* Are we finished with this relocation now? */ |
| 735 | if (fixP->fx_addsy == NULL) |
| 736 | fixP->fx_done = 1; |
| 737 | } |
| 738 | |
| 739 | char * |
| 740 | parse_exp (char *s, expressionS * op) |
| 741 | { |
| 742 | char *save = input_line_pointer; |
| 743 | char *new; |
| 744 | |
| 745 | if (!s) |
| 746 | { |
| 747 | return s; |
| 748 | } |
| 749 | |
| 750 | input_line_pointer = s; |
| 751 | expression (op); |
| 752 | new = input_line_pointer; |
| 753 | input_line_pointer = save; |
| 754 | return new; |
| 755 | } |
| 756 | |
| 757 | /* If the given string is a Visium opcode mnemonic return the code |
| 758 | otherwise return -1. Use binary chop to find matching entry. */ |
| 759 | static int |
| 760 | get_opcode (int *code, enum addressing_mode *mode, char *flags, char *mnem) |
| 761 | { |
| 762 | int l = 0; |
| 763 | int r = sizeof (opcode_table) / sizeof (struct opcode_entry) - 1; |
| 764 | |
| 765 | do |
| 766 | { |
| 767 | int mid = (l + r) / 2; |
| 768 | int ans = strcmp (mnem, opcode_table[mid].mnem); |
| 769 | |
| 770 | if (ans < 0) |
| 771 | r = mid - 1; |
| 772 | else if (ans > 0) |
| 773 | l = mid + 1; |
| 774 | else |
| 775 | { |
| 776 | *code = opcode_table[mid].code; |
| 777 | *mode = opcode_table[mid].mode; |
| 778 | *flags = opcode_table[mid].flags; |
| 779 | |
| 780 | return 0; |
| 781 | } |
| 782 | } |
| 783 | while (l <= r); |
| 784 | |
| 785 | return -1; |
| 786 | } |
| 787 | |
| 788 | /* This function is called when the assembler starts up. It is called |
| 789 | after the options have been parsed and the output file has been |
| 790 | opened. */ |
| 791 | void |
| 792 | md_begin (void) |
| 793 | { |
| 794 | switch (visium_arch) |
| 795 | { |
| 796 | case VISIUM_ARCH_DEF: |
| 797 | break; |
| 798 | case VISIUM_ARCH_MCM24: |
| 799 | visium_opcode_arch = VISIUM_OPCODE_ARCH_GR5; |
| 800 | visium_flags |= EF_VISIUM_ARCH_MCM24; |
| 801 | break; |
| 802 | case VISIUM_ARCH_MCM: |
| 803 | visium_opcode_arch = VISIUM_OPCODE_ARCH_GR5; |
| 804 | visium_flags |= EF_VISIUM_ARCH_MCM; |
| 805 | break; |
| 806 | case VISIUM_ARCH_GR6: |
| 807 | visium_opcode_arch = VISIUM_OPCODE_ARCH_GR6; |
| 808 | visium_flags |= EF_VISIUM_ARCH_MCM | EF_VISIUM_ARCH_GR6; |
| 809 | nop_limit = 2; |
| 810 | break; |
| 811 | default: |
| 812 | gas_assert (0); |
| 813 | } |
| 814 | |
| 815 | bfd_set_private_flags (stdoutput, visium_flags); |
| 816 | } |
| 817 | |
| 818 | /* This is identical to the md_atof in m68k.c. I think this is right, |
| 819 | but I'm not sure. |
| 820 | |
| 821 | Turn a string in input_line_pointer into a floating point constant of type |
| 822 | type, and store the appropriate bytes in *litP. The number of LITTLENUMS |
| 823 | emitted is stored in *sizeP . An error message is returned, |
| 824 | or NULL on OK. */ |
| 825 | |
| 826 | /* Equal to MAX_PRECISION in atof-ieee.c. */ |
| 827 | #define MAX_LITTLENUMS 6 |
| 828 | |
| 829 | const char * |
| 830 | md_atof (int type, char *litP, int *sizeP) |
| 831 | { |
| 832 | int i, prec; |
| 833 | LITTLENUM_TYPE words[MAX_LITTLENUMS]; |
| 834 | char *t; |
| 835 | |
| 836 | switch (type) |
| 837 | { |
| 838 | case 'f': |
| 839 | case 'F': |
| 840 | case 's': |
| 841 | case 'S': |
| 842 | prec = 2; |
| 843 | break; |
| 844 | |
| 845 | case 'd': |
| 846 | case 'D': |
| 847 | case 'r': |
| 848 | case 'R': |
| 849 | prec = 4; |
| 850 | break; |
| 851 | |
| 852 | case 'x': |
| 853 | case 'X': |
| 854 | prec = 6; |
| 855 | break; |
| 856 | |
| 857 | case 'p': |
| 858 | case 'P': |
| 859 | prec = 6; |
| 860 | break; |
| 861 | |
| 862 | default: |
| 863 | *sizeP = 0; |
| 864 | return _("Bad call to MD_ATOF()"); |
| 865 | } |
| 866 | |
| 867 | t = atof_ieee (input_line_pointer, type, words); |
| 868 | if (t) |
| 869 | input_line_pointer = t; |
| 870 | *sizeP = prec * sizeof (LITTLENUM_TYPE); |
| 871 | |
| 872 | if (target_big_endian) |
| 873 | { |
| 874 | for (i = 0; i < prec; i++) |
| 875 | { |
| 876 | md_number_to_chars (litP, (valueT) words[i], |
| 877 | sizeof (LITTLENUM_TYPE)); |
| 878 | litP += sizeof (LITTLENUM_TYPE); |
| 879 | } |
| 880 | } |
| 881 | else |
| 882 | { |
| 883 | for (i = prec - 1; i >= 0; i--) |
| 884 | { |
| 885 | md_number_to_chars (litP, (valueT) words[i], |
| 886 | sizeof (LITTLENUM_TYPE)); |
| 887 | litP += sizeof (LITTLENUM_TYPE); |
| 888 | } |
| 889 | } |
| 890 | |
| 891 | return 0; |
| 892 | } |
| 893 | |
| 894 | static inline char * |
| 895 | skip_space (char *s) |
| 896 | { |
| 897 | while (*s == ' ' || *s == '\t') |
| 898 | ++s; |
| 899 | |
| 900 | return s; |
| 901 | } |
| 902 | |
| 903 | static int |
| 904 | parse_gen_reg (char **sptr, int *rptr) |
| 905 | { |
| 906 | char *s = skip_space (*sptr); |
| 907 | char buf[10]; |
| 908 | int cnt; |
| 909 | int l, r; |
| 910 | |
| 911 | cnt = 0; |
| 912 | memset (buf, '\0', 10); |
| 913 | while ((ISALNUM (*s)) && cnt < 10) |
| 914 | buf[cnt++] = TOLOWER (*s++); |
| 915 | |
| 916 | l = 0; |
| 917 | r = sizeof (gen_reg_table) / sizeof (struct reg_entry) - 1; |
| 918 | |
| 919 | do |
| 920 | { |
| 921 | int mid = (l + r) / 2; |
| 922 | int ans = strcmp (buf, gen_reg_table[mid].name); |
| 923 | |
| 924 | if (ans < 0) |
| 925 | r = mid - 1; |
| 926 | else if (ans > 0) |
| 927 | l = mid + 1; |
| 928 | else |
| 929 | { |
| 930 | *rptr = gen_reg_table[mid].code; |
| 931 | *sptr = s; |
| 932 | return 0; |
| 933 | } |
| 934 | } |
| 935 | while (l <= r); |
| 936 | |
| 937 | return -1; |
| 938 | } |
| 939 | |
| 940 | static int |
| 941 | parse_fp_reg (char **sptr, int *rptr) |
| 942 | { |
| 943 | char *s = skip_space (*sptr); |
| 944 | char buf[10]; |
| 945 | int cnt; |
| 946 | int l, r; |
| 947 | |
| 948 | cnt = 0; |
| 949 | memset (buf, '\0', 10); |
| 950 | while ((ISALNUM (*s)) && cnt < 10) |
| 951 | buf[cnt++] = TOLOWER (*s++); |
| 952 | |
| 953 | l = 0; |
| 954 | r = sizeof (fp_reg_table) / sizeof (struct reg_entry) - 1; |
| 955 | |
| 956 | do |
| 957 | { |
| 958 | int mid = (l + r) / 2; |
| 959 | int ans = strcmp (buf, fp_reg_table[mid].name); |
| 960 | |
| 961 | if (ans < 0) |
| 962 | r = mid - 1; |
| 963 | else if (ans > 0) |
| 964 | l = mid + 1; |
| 965 | else |
| 966 | { |
| 967 | *rptr = fp_reg_table[mid].code; |
| 968 | *sptr = s; |
| 969 | return 0; |
| 970 | } |
| 971 | } |
| 972 | while (l <= r); |
| 973 | |
| 974 | return -1; |
| 975 | } |
| 976 | |
| 977 | static int |
| 978 | parse_cc (char **sptr, int *rptr) |
| 979 | { |
| 980 | char *s = skip_space (*sptr); |
| 981 | char buf[10]; |
| 982 | int cnt; |
| 983 | int l, r; |
| 984 | |
| 985 | cnt = 0; |
| 986 | memset (buf, '\0', 10); |
| 987 | while ((ISALNUM (*s)) && cnt < 10) |
| 988 | buf[cnt++] = TOLOWER (*s++); |
| 989 | |
| 990 | l = 0; |
| 991 | r = sizeof (cc_table) / sizeof (struct cc_entry) - 1; |
| 992 | |
| 993 | do |
| 994 | { |
| 995 | int mid = (l + r) / 2; |
| 996 | int ans = strcmp (buf, cc_table[mid].name); |
| 997 | |
| 998 | if (ans < 0) |
| 999 | r = mid - 1; |
| 1000 | else if (ans > 0) |
| 1001 | l = mid + 1; |
| 1002 | else |
| 1003 | { |
| 1004 | *rptr = cc_table[mid].code; |
| 1005 | *sptr = s; |
| 1006 | return 0; |
| 1007 | } |
| 1008 | } |
| 1009 | while (l <= r); |
| 1010 | |
| 1011 | return -1; |
| 1012 | } |
| 1013 | |
| 1014 | /* Previous dest is the destination register number of the instruction |
| 1015 | before the current one. */ |
| 1016 | static int previous_dest = 0; |
| 1017 | static int previous_mode = 0; |
| 1018 | static int condition_code = 0; |
| 1019 | static int this_dest = 0; |
| 1020 | static int this_mode = 0; |
| 1021 | |
| 1022 | |
| 1023 | /* This is the main function in this file. It takes a line of assembly language |
| 1024 | source code and assembles it. Note, labels and pseudo ops have already |
| 1025 | been removed, so too has leading white space. */ |
| 1026 | void |
| 1027 | md_assemble (char *str0) |
| 1028 | { |
| 1029 | char *str = str0; |
| 1030 | int cnt; |
| 1031 | char mnem[10]; |
| 1032 | int opcode; |
| 1033 | enum addressing_mode amode; |
| 1034 | char arch_flags; |
| 1035 | int ans; |
| 1036 | |
| 1037 | char *output; |
| 1038 | int reloc = 0; |
| 1039 | relax_substateT relax = 0; |
| 1040 | expressionS e1; |
| 1041 | int r1, r2, r3; |
| 1042 | int cc; |
| 1043 | int indx; |
| 1044 | |
| 1045 | /* Initialize the expression. */ |
| 1046 | e1.X_op = O_absent; |
| 1047 | |
| 1048 | /* Initialize destination register. |
| 1049 | If the instruction we just looked at is in the delay slot of an |
| 1050 | unconditional branch, then there is no index hazard. */ |
| 1051 | if ((previous_mode == mode_cad || previous_mode == mode_ci) |
| 1052 | && condition_code == 15) |
| 1053 | this_dest = 0; |
| 1054 | |
| 1055 | previous_dest = this_dest; |
| 1056 | previous_mode = this_mode; |
| 1057 | this_dest = 0; |
| 1058 | |
| 1059 | /* Drop leading whitespace (probably not required). */ |
| 1060 | while (*str == ' ') |
| 1061 | str++; |
| 1062 | |
| 1063 | /* Get opcode mnemonic and make sure it's in lower case. */ |
| 1064 | cnt = 0; |
| 1065 | memset (mnem, '\0', 10); |
| 1066 | while ((ISALNUM (*str) || *str == '.' || *str == '_') && cnt < 10) |
| 1067 | mnem[cnt++] = TOLOWER (*str++); |
| 1068 | |
| 1069 | /* Look up mnemonic in opcode table, and get the code, |
| 1070 | the instruction format, and the flags that indicate |
| 1071 | which family members support this mnenonic. */ |
| 1072 | if (get_opcode (&opcode, &amode, &arch_flags, mnem) < 0) |
| 1073 | { |
| 1074 | as_bad ("Unknown instruction mnenonic `%s'", mnem); |
| 1075 | return; |
| 1076 | } |
| 1077 | |
| 1078 | if ((VISIUM_OPCODE_ARCH_MASK (visium_opcode_arch) & arch_flags) == 0) |
| 1079 | { |
| 1080 | as_bad ("Architecture mismatch on `%s'", mnem); |
| 1081 | return; |
| 1082 | } |
| 1083 | |
| 1084 | this_mode = amode; |
| 1085 | |
| 1086 | switch (amode) |
| 1087 | { |
| 1088 | case mode_d: |
| 1089 | /* register := |
| 1090 | Example: |
| 1091 | readmda r1 */ |
| 1092 | ans = parse_gen_reg (&str, &r1); |
| 1093 | if (ans < 0) |
| 1094 | { |
| 1095 | as_bad ("Dest register required"); |
| 1096 | return; |
| 1097 | } |
| 1098 | opcode |= (r1 << 10); |
| 1099 | this_dest = r1; |
| 1100 | break; |
| 1101 | |
| 1102 | case mode_a: |
| 1103 | /* op= register |
| 1104 | Example: asld r1 */ |
| 1105 | ans = parse_gen_reg (&str, &r1); |
| 1106 | if (ans < 0) |
| 1107 | { |
| 1108 | as_bad ("SourceA register required"); |
| 1109 | return; |
| 1110 | } |
| 1111 | opcode |= (r1 << 16); |
| 1112 | break; |
| 1113 | |
| 1114 | case mode_ab: |
| 1115 | /* register * register |
| 1116 | Example: |
| 1117 | mults r1,r2 */ |
| 1118 | ans = parse_gen_reg (&str, &r1); |
| 1119 | if (ans < 0) |
| 1120 | { |
| 1121 | as_bad ("SourceA register required"); |
| 1122 | return; |
| 1123 | } |
| 1124 | str = skip_space (str); |
| 1125 | if (*str == ',') |
| 1126 | { |
| 1127 | str++; |
| 1128 | ans = parse_gen_reg (&str, &r2); |
| 1129 | if (ans < 0) |
| 1130 | { |
| 1131 | as_bad ("SourceB register required"); |
| 1132 | return; |
| 1133 | } |
| 1134 | opcode |= (r1 << 16) | (r2 << 4); |
| 1135 | } |
| 1136 | else |
| 1137 | { |
| 1138 | as_bad ("SourceB register required"); |
| 1139 | return; |
| 1140 | } |
| 1141 | break; |
| 1142 | |
| 1143 | case mode_da: |
| 1144 | /* register := register |
| 1145 | Example: |
| 1146 | extb.l r1,r2 */ |
| 1147 | ans = parse_gen_reg (&str, &r1); |
| 1148 | if (ans < 0) |
| 1149 | { |
| 1150 | as_bad ("Dest register required"); |
| 1151 | return; |
| 1152 | } |
| 1153 | str = skip_space (str); |
| 1154 | if (*str == ',') |
| 1155 | { |
| 1156 | str++; |
| 1157 | ans = parse_gen_reg (&str, &r2); |
| 1158 | if (ans < 0) |
| 1159 | { |
| 1160 | as_bad ("SourceA register required"); |
| 1161 | return; |
| 1162 | } |
| 1163 | opcode |= (r1 << 10) | (r2 << 16); |
| 1164 | } |
| 1165 | else |
| 1166 | { |
| 1167 | as_bad ("SourceB register required"); |
| 1168 | return; |
| 1169 | } |
| 1170 | this_dest = r1; |
| 1171 | break; |
| 1172 | |
| 1173 | case mode_dab: |
| 1174 | /* register := register * register |
| 1175 | Example: |
| 1176 | add.l r1,r2,r3 */ |
| 1177 | ans = parse_gen_reg (&str, &r1); |
| 1178 | if (ans < 0) |
| 1179 | { |
| 1180 | as_bad ("Dest register required"); |
| 1181 | return; |
| 1182 | } |
| 1183 | str = skip_space (str); |
| 1184 | if (*str == ',') |
| 1185 | { |
| 1186 | str++; |
| 1187 | ans = parse_gen_reg (&str, &r2); |
| 1188 | if (ans < 0) |
| 1189 | { |
| 1190 | as_bad ("SourceA register required"); |
| 1191 | return; |
| 1192 | } |
| 1193 | str = skip_space (str); |
| 1194 | if (*str == ',') |
| 1195 | { |
| 1196 | str++; |
| 1197 | ans = parse_gen_reg (&str, &r3); |
| 1198 | if (ans < 0) |
| 1199 | { |
| 1200 | as_bad ("SourceB register required"); |
| 1201 | return; |
| 1202 | } |
| 1203 | |
| 1204 | /* Got three regs, assemble instruction. */ |
| 1205 | opcode |= (r1 << 10) | (r2 << 16) | (r3 << 4); |
| 1206 | } |
| 1207 | else |
| 1208 | { |
| 1209 | as_bad ("SourceA register required"); |
| 1210 | return; |
| 1211 | } |
| 1212 | } |
| 1213 | else |
| 1214 | { |
| 1215 | as_bad ("Dest register required"); |
| 1216 | return; |
| 1217 | } |
| 1218 | this_dest = r1; |
| 1219 | break; |
| 1220 | |
| 1221 | case mode_iab: |
| 1222 | /* 5-bit immediate * register * register |
| 1223 | Example: |
| 1224 | eamwrite 3,r1,r2 */ |
| 1225 | str = parse_exp (str, &e1); |
| 1226 | str = skip_space (str); |
| 1227 | if (e1.X_op != O_absent && *str == ',') |
| 1228 | { |
| 1229 | int eam_op = e1.X_add_number; |
| 1230 | |
| 1231 | str = skip_space (str + 1); |
| 1232 | ans = parse_gen_reg (&str, &r2); |
| 1233 | if (ans < 0) |
| 1234 | { |
| 1235 | as_bad ("SourceA register required"); |
| 1236 | return; |
| 1237 | } |
| 1238 | str = skip_space (str); |
| 1239 | if (*str == ',') |
| 1240 | { |
| 1241 | str++; |
| 1242 | ans = parse_gen_reg (&str, &r3); |
| 1243 | if (ans < 0) |
| 1244 | { |
| 1245 | as_bad ("SourceB register required"); |
| 1246 | return; |
| 1247 | } |
| 1248 | |
| 1249 | /* Got three operands, assemble instruction. */ |
| 1250 | if (eam_op < 0 || eam_op > 31) |
| 1251 | { |
| 1252 | as_bad ("eam_op out of range"); |
| 1253 | } |
| 1254 | opcode |= ((eam_op & 0x1f) << 10) | (r2 << 16) | (r3 << 4); |
| 1255 | } |
| 1256 | } |
| 1257 | else |
| 1258 | { |
| 1259 | as_bad ("EAM_OP required"); |
| 1260 | return; |
| 1261 | } |
| 1262 | break; |
| 1263 | |
| 1264 | case mode_0ab: |
| 1265 | /* zero * register * register |
| 1266 | Example: |
| 1267 | cmp.l r1,r2 */ |
| 1268 | ans = parse_gen_reg (&str, &r1); |
| 1269 | if (ans < 0) |
| 1270 | { |
| 1271 | as_bad ("SourceA register required"); |
| 1272 | return; |
| 1273 | } |
| 1274 | str = skip_space (str); |
| 1275 | if (*str == ',') |
| 1276 | { |
| 1277 | str++; |
| 1278 | ans = parse_gen_reg (&str, &r2); |
| 1279 | if (ans < 0) |
| 1280 | { |
| 1281 | as_bad ("SourceB register required"); |
| 1282 | return; |
| 1283 | } |
| 1284 | opcode |= (r1 << 16) | (r2 << 4); |
| 1285 | } |
| 1286 | else |
| 1287 | { |
| 1288 | as_bad ("SourceB register required"); |
| 1289 | return; |
| 1290 | } |
| 1291 | break; |
| 1292 | |
| 1293 | case mode_da0: |
| 1294 | /* register * register * zero |
| 1295 | Example: |
| 1296 | move.l r1,r2 */ |
| 1297 | ans = parse_gen_reg (&str, &r1); |
| 1298 | if (ans < 0) |
| 1299 | { |
| 1300 | as_bad ("Dest register required"); |
| 1301 | return; |
| 1302 | } |
| 1303 | str = skip_space (str); |
| 1304 | if (*str == ',') |
| 1305 | { |
| 1306 | str++; |
| 1307 | ans = parse_gen_reg (&str, &r2); |
| 1308 | if (ans < 0) |
| 1309 | { |
| 1310 | as_bad ("SourceA register required"); |
| 1311 | return; |
| 1312 | } |
| 1313 | opcode |= (r1 << 10) | (r2 << 16); |
| 1314 | } |
| 1315 | else |
| 1316 | { |
| 1317 | as_bad ("SourceA register required"); |
| 1318 | return; |
| 1319 | } |
| 1320 | this_dest = r1; |
| 1321 | break; |
| 1322 | |
| 1323 | case mode_cad: |
| 1324 | /* condition * register * register |
| 1325 | Example: |
| 1326 | bra tr,r1,r2 */ |
| 1327 | ans = parse_cc (&str, &cc); |
| 1328 | if (ans < 0) |
| 1329 | { |
| 1330 | as_bad ("condition code required"); |
| 1331 | return; |
| 1332 | } |
| 1333 | |
| 1334 | str = skip_space (str); |
| 1335 | if (*str == ',') |
| 1336 | { |
| 1337 | str = skip_space (str + 1); |
| 1338 | ans = parse_gen_reg (&str, &r2); |
| 1339 | if (ans < 0) |
| 1340 | { |
| 1341 | as_bad ("SourceA register required"); |
| 1342 | return; |
| 1343 | } |
| 1344 | str = skip_space (str); |
| 1345 | if (*str == ',') |
| 1346 | { |
| 1347 | str++; |
| 1348 | ans = parse_gen_reg (&str, &r3); |
| 1349 | if (ans < 0) |
| 1350 | { |
| 1351 | as_bad ("Dest register required"); |
| 1352 | return; |
| 1353 | } |
| 1354 | |
| 1355 | /* Got three operands, assemble instruction. */ |
| 1356 | opcode |= (cc << 27) | (r2 << 16) | (r3 << 10); |
| 1357 | } |
| 1358 | else |
| 1359 | { |
| 1360 | as_bad ("Dest register required"); |
| 1361 | return; |
| 1362 | } |
| 1363 | } |
| 1364 | else |
| 1365 | { |
| 1366 | as_bad ("SourceA register required"); |
| 1367 | return; |
| 1368 | } |
| 1369 | |
| 1370 | if (previous_mode == mode_cad || previous_mode == mode_ci) |
| 1371 | as_bad ("branch instruction in delay slot"); |
| 1372 | |
| 1373 | this_dest = r3; |
| 1374 | condition_code = cc; |
| 1375 | break; |
| 1376 | |
| 1377 | case mode_das: |
| 1378 | /* register := register * 5-bit imediate/register shift count |
| 1379 | Example: |
| 1380 | asl.l r1,r2,4 */ |
| 1381 | ans = parse_gen_reg (&str, &r1); |
| 1382 | if (ans < 0) |
| 1383 | { |
| 1384 | as_bad ("Dest register required"); |
| 1385 | return; |
| 1386 | } |
| 1387 | str = skip_space (str); |
| 1388 | if (*str == ',') |
| 1389 | { |
| 1390 | str++; |
| 1391 | ans = parse_gen_reg (&str, &r2); |
| 1392 | if (ans < 0) |
| 1393 | { |
| 1394 | as_bad ("SourceA register required"); |
| 1395 | return; |
| 1396 | } |
| 1397 | str = skip_space (str); |
| 1398 | if (*str == ',') |
| 1399 | { |
| 1400 | str++; |
| 1401 | ans = parse_gen_reg (&str, &r3); |
| 1402 | if (ans == 0) |
| 1403 | { |
| 1404 | opcode |= (r1 << 10) | (r2 << 16) | (r3 << 4); |
| 1405 | } |
| 1406 | else |
| 1407 | { |
| 1408 | str = parse_exp (str, &e1); |
| 1409 | if (e1.X_op == O_constant) |
| 1410 | { |
| 1411 | int imm = e1.X_add_number; |
| 1412 | |
| 1413 | if (imm < 0 || imm > 31) |
| 1414 | as_bad ("immediate value out of range"); |
| 1415 | |
| 1416 | opcode |= |
| 1417 | (r1 << 10) | (r2 << 16) | (1 << 9) | ((imm & 0x1f) << |
| 1418 | 4); |
| 1419 | } |
| 1420 | else |
| 1421 | { |
| 1422 | as_bad ("immediate operand required"); |
| 1423 | return; |
| 1424 | } |
| 1425 | } |
| 1426 | } |
| 1427 | } |
| 1428 | else |
| 1429 | { |
| 1430 | as_bad ("SourceA register required"); |
| 1431 | return; |
| 1432 | } |
| 1433 | this_dest = r1; |
| 1434 | break; |
| 1435 | |
| 1436 | case mode_di: |
| 1437 | /* register := 5-bit immediate |
| 1438 | Example: |
| 1439 | eamread r1,3 */ |
| 1440 | ans = parse_gen_reg (&str, &r1); |
| 1441 | if (ans < 0) |
| 1442 | { |
| 1443 | as_bad ("Dest register required"); |
| 1444 | return; |
| 1445 | } |
| 1446 | str = skip_space (str); |
| 1447 | if (*str == ',') |
| 1448 | { |
| 1449 | str++; |
| 1450 | str = parse_exp (str, &e1); |
| 1451 | if (e1.X_op == O_constant) |
| 1452 | { |
| 1453 | int opnd2 = e1.X_add_number; |
| 1454 | |
| 1455 | if (opnd2 < 0 || opnd2 > 31) |
| 1456 | { |
| 1457 | as_bad ("immediate operand out of range"); |
| 1458 | return; |
| 1459 | } |
| 1460 | opcode |= (r1 << 10) | ((opnd2 & 0x1f) << 4); |
| 1461 | } |
| 1462 | else |
| 1463 | { |
| 1464 | as_bad ("immediate operand required"); |
| 1465 | return; |
| 1466 | } |
| 1467 | } |
| 1468 | else |
| 1469 | { |
| 1470 | as_bad ("immediate operand required"); |
| 1471 | return; |
| 1472 | } |
| 1473 | this_dest = r1; |
| 1474 | break; |
| 1475 | |
| 1476 | case mode_ir: |
| 1477 | /* 5-bit immediate * register, e.g. trace 1,r1 */ |
| 1478 | str = parse_exp (str, &e1); |
| 1479 | str = skip_space (str); |
| 1480 | if (e1.X_op == O_constant && *str == ',') |
| 1481 | { |
| 1482 | int opnd1 = e1.X_add_number; |
| 1483 | |
| 1484 | str = skip_space (str + 1); |
| 1485 | ans = parse_gen_reg (&str, &r2); |
| 1486 | if (ans < 0) |
| 1487 | { |
| 1488 | as_bad ("SourceA register required"); |
| 1489 | return; |
| 1490 | } |
| 1491 | |
| 1492 | /* Got two operands, assemble instruction. */ |
| 1493 | if (opnd1 < 0 || opnd1 > 31) |
| 1494 | { |
| 1495 | as_bad ("1st operand out of range"); |
| 1496 | } |
| 1497 | opcode |= ((opnd1 & 0x1f) << 10) | (r2 << 16); |
| 1498 | } |
| 1499 | else |
| 1500 | { |
| 1501 | as_bad ("Immediate operand required"); |
| 1502 | return; |
| 1503 | } |
| 1504 | break; |
| 1505 | |
| 1506 | case mode_ai: |
| 1507 | /* register *= 16-bit unsigned immediate |
| 1508 | Example: |
| 1509 | addi r1,123 */ |
| 1510 | ans = parse_gen_reg (&str, &r1); |
| 1511 | if (ans < 0) |
| 1512 | { |
| 1513 | as_bad ("Dest register required"); |
| 1514 | return; |
| 1515 | } |
| 1516 | opcode |= (r1 << 16); |
| 1517 | |
| 1518 | str = skip_space (str); |
| 1519 | if (*str != ',') |
| 1520 | { |
| 1521 | as_bad ("immediate value missing"); |
| 1522 | return; |
| 1523 | } |
| 1524 | this_dest = r1; |
| 1525 | |
| 1526 | /* fall through... */ |
| 1527 | |
| 1528 | case mode_i: |
| 1529 | /* MOVIL/WRTL traditionally get an implicit "%l" applied |
| 1530 | to their immediate value. For other opcodes, unless |
| 1531 | the immediate value is decorated with "%u" or "%l" |
| 1532 | it must be in the range 0 .. 65535. */ |
| 1533 | if ((opcode & 0x7fe00000) == 0x04800000 |
| 1534 | || (opcode & 0x7fe00000) == 0x05000000) |
| 1535 | reloc = BFD_RELOC_VISIUM_LO16; |
| 1536 | else |
| 1537 | reloc = BFD_RELOC_VISIUM_IM16; |
| 1538 | |
| 1539 | str = skip_space (str + 1); |
| 1540 | |
| 1541 | if (*str == '%') |
| 1542 | { |
| 1543 | if (str[1] == 'u') |
| 1544 | reloc = BFD_RELOC_VISIUM_HI16; |
| 1545 | else if (str[1] == 'l') |
| 1546 | reloc = BFD_RELOC_VISIUM_LO16; |
| 1547 | else |
| 1548 | { |
| 1549 | as_bad ("bad char after %%"); |
| 1550 | return; |
| 1551 | } |
| 1552 | |
| 1553 | str += 2; |
| 1554 | } |
| 1555 | str = parse_exp (str, &e1); |
| 1556 | if (e1.X_op != O_absent) |
| 1557 | { |
| 1558 | if (e1.X_op == O_constant) |
| 1559 | { |
| 1560 | int imm = e1.X_add_number; |
| 1561 | |
| 1562 | if (reloc == BFD_RELOC_VISIUM_HI16) |
| 1563 | opcode |= ((imm >> 16) & 0xffff); |
| 1564 | else if (reloc == BFD_RELOC_VISIUM_LO16) |
| 1565 | opcode |= (imm & 0xffff); |
| 1566 | else |
| 1567 | { |
| 1568 | if (imm < 0 || imm > 0xffff) |
| 1569 | as_bad ("immediate value out of range"); |
| 1570 | |
| 1571 | opcode |= (imm & 0xffff); |
| 1572 | } |
| 1573 | /* No relocation is needed. */ |
| 1574 | reloc = 0; |
| 1575 | } |
| 1576 | } |
| 1577 | else |
| 1578 | { |
| 1579 | as_bad ("immediate value missing"); |
| 1580 | return; |
| 1581 | } |
| 1582 | break; |
| 1583 | |
| 1584 | case mode_bax: |
| 1585 | /* register * register * 5-bit immediate, |
| 1586 | SourceB * SourceA * Index |
| 1587 | Examples |
| 1588 | write.l (r1),r2 |
| 1589 | write.l 3(r1),r2 */ |
| 1590 | str = skip_space (str); |
| 1591 | |
| 1592 | indx = 0; |
| 1593 | if (*str != '(') |
| 1594 | { |
| 1595 | str = parse_exp (str, &e1); |
| 1596 | if (e1.X_op == O_constant) |
| 1597 | { |
| 1598 | indx = e1.X_add_number; |
| 1599 | |
| 1600 | if (indx < 0 || indx > 31) |
| 1601 | { |
| 1602 | as_bad ("Index out of range"); |
| 1603 | return; |
| 1604 | } |
| 1605 | } |
| 1606 | else |
| 1607 | { |
| 1608 | as_bad ("Index(SourceA) required"); |
| 1609 | return; |
| 1610 | } |
| 1611 | } |
| 1612 | |
| 1613 | str = skip_space (str); |
| 1614 | |
| 1615 | if (*str != '(') |
| 1616 | { |
| 1617 | as_bad ("Index(SourceA) required"); |
| 1618 | return; |
| 1619 | } |
| 1620 | |
| 1621 | str = skip_space (str + 1); |
| 1622 | |
| 1623 | ans = parse_gen_reg (&str, &r1); |
| 1624 | if (ans < 0) |
| 1625 | { |
| 1626 | as_bad ("SourceA register required"); |
| 1627 | return; |
| 1628 | } |
| 1629 | str = skip_space (str); |
| 1630 | if (*str != ')') |
| 1631 | { |
| 1632 | as_bad ("(SourceA) required"); |
| 1633 | return; |
| 1634 | } |
| 1635 | str = skip_space (str + 1); |
| 1636 | |
| 1637 | if (*str == ',') |
| 1638 | { |
| 1639 | str = skip_space (str + 1); |
| 1640 | ans = parse_gen_reg (&str, &r2); |
| 1641 | if (ans < 0) |
| 1642 | { |
| 1643 | as_bad ("SourceB register required"); |
| 1644 | return; |
| 1645 | } |
| 1646 | } |
| 1647 | else |
| 1648 | { |
| 1649 | as_bad ("SourceB register required"); |
| 1650 | return; |
| 1651 | } |
| 1652 | |
| 1653 | opcode |= (r1 << 16) | (r2 << 4) | ((indx & 0x1f) << 10); |
| 1654 | |
| 1655 | if (indx != 0 && previous_mode == mode_cad) |
| 1656 | { |
| 1657 | /* We're in a delay slot. |
| 1658 | If the base reg is the destination of the branch, then issue |
| 1659 | an error message. |
| 1660 | Otherwise it is safe to use the base and index. */ |
| 1661 | if (previous_dest != 0 && r1 == previous_dest) |
| 1662 | { |
| 1663 | as_bad ("base register not ready"); |
| 1664 | return; |
| 1665 | } |
| 1666 | } |
| 1667 | else if (previous_dest != 0 |
| 1668 | && r1 == previous_dest |
| 1669 | && (visium_arch == VISIUM_ARCH_MCM |
| 1670 | || visium_arch == VISIUM_ARCH_MCM24 |
| 1671 | || (visium_arch == VISIUM_ARCH_DEF && indx != 0))) |
| 1672 | { |
| 1673 | as_warn ("base register not ready, NOP inserted."); |
| 1674 | /* Insert a NOP before the write instruction. */ |
| 1675 | output = frag_more (4); |
| 1676 | memset (output, 0, 4); |
| 1677 | } |
| 1678 | break; |
| 1679 | |
| 1680 | case mode_dax: |
| 1681 | /* register := register * 5-bit immediate |
| 1682 | Examples: |
| 1683 | read.b r1,(r2) |
| 1684 | read.w r1,3(r2) */ |
| 1685 | ans = parse_gen_reg (&str, &r1); |
| 1686 | if (ans < 0) |
| 1687 | { |
| 1688 | as_bad ("Dest register required"); |
| 1689 | return; |
| 1690 | } |
| 1691 | str = skip_space (str); |
| 1692 | if (*str != ',') |
| 1693 | { |
| 1694 | as_bad ("SourceA required"); |
| 1695 | return; |
| 1696 | } |
| 1697 | str = skip_space (str + 1); |
| 1698 | |
| 1699 | indx = 0; |
| 1700 | if (*str != '(') |
| 1701 | { |
| 1702 | str = parse_exp (str, &e1); |
| 1703 | if (e1.X_op == O_constant) |
| 1704 | { |
| 1705 | indx = e1.X_add_number; |
| 1706 | |
| 1707 | if (indx < 0 || indx > 31) |
| 1708 | { |
| 1709 | as_bad ("Index out of range"); |
| 1710 | return; |
| 1711 | } |
| 1712 | } |
| 1713 | else |
| 1714 | { |
| 1715 | as_bad ("Immediate 0 to 31 required"); |
| 1716 | return; |
| 1717 | } |
| 1718 | } |
| 1719 | if (*str != '(') |
| 1720 | { |
| 1721 | as_bad ("(SourceA) required"); |
| 1722 | return; |
| 1723 | } |
| 1724 | str++; |
| 1725 | ans = parse_gen_reg (&str, &r2); |
| 1726 | if (ans < 0) |
| 1727 | { |
| 1728 | as_bad ("SourceA register required"); |
| 1729 | return; |
| 1730 | } |
| 1731 | str = skip_space (str); |
| 1732 | if (*str != ')') |
| 1733 | { |
| 1734 | as_bad ("(SourceA) required"); |
| 1735 | return; |
| 1736 | } |
| 1737 | str++; |
| 1738 | opcode |= (r1 << 10) | (r2 << 16) | ((indx & 0x1f) << 4); |
| 1739 | this_dest = r1; |
| 1740 | |
| 1741 | if (indx != 0 && previous_mode == mode_cad) |
| 1742 | { |
| 1743 | /* We're in a delay slot. |
| 1744 | If the base reg is the destination of the branch, then issue |
| 1745 | an error message. |
| 1746 | Otherwise it is safe to use the base and index. */ |
| 1747 | if (previous_dest != 0 && r2 == previous_dest) |
| 1748 | { |
| 1749 | as_bad ("base register not ready"); |
| 1750 | return; |
| 1751 | } |
| 1752 | } |
| 1753 | else if (previous_dest != 0 |
| 1754 | && r2 == previous_dest |
| 1755 | && (visium_arch == VISIUM_ARCH_MCM |
| 1756 | || visium_arch == VISIUM_ARCH_MCM24 |
| 1757 | || (visium_arch == VISIUM_ARCH_DEF && indx != 0))) |
| 1758 | { |
| 1759 | as_warn ("base register not ready, NOP inserted."); |
| 1760 | /* Insert a NOP before the read instruction. */ |
| 1761 | output = frag_more (4); |
| 1762 | memset (output, 0, 4); |
| 1763 | } |
| 1764 | break; |
| 1765 | |
| 1766 | case mode_s: |
| 1767 | /* special mode |
| 1768 | Example: |
| 1769 | nop */ |
| 1770 | str = skip_space (str); |
| 1771 | break; |
| 1772 | |
| 1773 | case mode_ci: |
| 1774 | /* condition * 16-bit signed word displacement |
| 1775 | Example: |
| 1776 | brr L1 */ |
| 1777 | ans = parse_cc (&str, &cc); |
| 1778 | if (ans < 0) |
| 1779 | { |
| 1780 | as_bad ("condition code required"); |
| 1781 | return; |
| 1782 | } |
| 1783 | opcode |= (cc << 27); |
| 1784 | |
| 1785 | str = skip_space (str); |
| 1786 | if (*str == ',') |
| 1787 | { |
| 1788 | str = skip_space (str + 1); |
| 1789 | str = parse_exp (str, &e1); |
| 1790 | if (e1.X_op != O_absent) |
| 1791 | { |
| 1792 | if (e1.X_op == O_constant) |
| 1793 | { |
| 1794 | int imm = e1.X_add_number; |
| 1795 | |
| 1796 | if (imm < -32768 || imm > 32767) |
| 1797 | as_bad ("immediate value out of range"); |
| 1798 | |
| 1799 | /* The GR6 doesn't correctly handle a 0 displacement |
| 1800 | so we insert a NOP and change it to -1. */ |
| 1801 | if (imm == 0 && cc != 0 && visium_arch == VISIUM_ARCH_GR6) |
| 1802 | { |
| 1803 | output = frag_more (4); |
| 1804 | memset (output, 0, 4); |
| 1805 | imm = -1; |
| 1806 | } |
| 1807 | |
| 1808 | opcode |= (imm & 0xffff); |
| 1809 | } |
| 1810 | else if (e1.X_op == O_symbol) |
| 1811 | { |
| 1812 | /* The GR6 doesn't correctly handle a 0 displacement |
| 1813 | so the instruction requires relaxation. */ |
| 1814 | if (cc != 0 && visium_arch == VISIUM_ARCH_GR6) |
| 1815 | relax = amode; |
| 1816 | else |
| 1817 | reloc = BFD_RELOC_VISIUM_REL16; |
| 1818 | } |
| 1819 | else |
| 1820 | { |
| 1821 | as_bad ("immediate value missing"); |
| 1822 | return; |
| 1823 | } |
| 1824 | } |
| 1825 | else |
| 1826 | { |
| 1827 | as_bad ("immediate value missing"); |
| 1828 | return; |
| 1829 | } |
| 1830 | } |
| 1831 | else |
| 1832 | { |
| 1833 | as_bad ("immediate value missing"); |
| 1834 | return; |
| 1835 | } |
| 1836 | |
| 1837 | if (previous_mode == mode_cad || previous_mode == mode_ci) |
| 1838 | as_bad ("branch instruction in delay slot"); |
| 1839 | |
| 1840 | condition_code = cc; |
| 1841 | break; |
| 1842 | |
| 1843 | case mode_fdab: |
| 1844 | /* float := float * float |
| 1845 | Example |
| 1846 | fadd f4,f3,f2 */ |
| 1847 | ans = parse_fp_reg (&str, &r1); |
| 1848 | if (ans < 0) |
| 1849 | { |
| 1850 | as_bad ("floating point destination register required"); |
| 1851 | return; |
| 1852 | } |
| 1853 | str = skip_space (str); |
| 1854 | if (*str == ',') |
| 1855 | { |
| 1856 | str++; |
| 1857 | ans = parse_fp_reg (&str, &r2); |
| 1858 | if (ans < 0) |
| 1859 | { |
| 1860 | as_bad ("floating point SourceA register required"); |
| 1861 | return; |
| 1862 | } |
| 1863 | str = skip_space (str); |
| 1864 | if (*str == ',') |
| 1865 | { |
| 1866 | str++; |
| 1867 | ans = parse_fp_reg (&str, &r3); |
| 1868 | if (ans < 0) |
| 1869 | { |
| 1870 | as_bad ("floating point SourceB register required"); |
| 1871 | return; |
| 1872 | } |
| 1873 | |
| 1874 | /* Got 3 floating regs, assemble instruction. */ |
| 1875 | opcode |= (r1 << 10) | (r2 << 16) | (r3 << 4); |
| 1876 | } |
| 1877 | else |
| 1878 | { |
| 1879 | as_bad ("floating point SourceB register required"); |
| 1880 | return; |
| 1881 | } |
| 1882 | } |
| 1883 | else |
| 1884 | { |
| 1885 | as_bad ("floating point SourceA register required"); |
| 1886 | return; |
| 1887 | } |
| 1888 | break; |
| 1889 | |
| 1890 | case mode_ifdab: |
| 1891 | /* 4-bit immediate * float * float * float |
| 1892 | Example |
| 1893 | fpinst 10,f1,f2,f3 */ |
| 1894 | str = parse_exp (str, &e1); |
| 1895 | str = skip_space (str); |
| 1896 | if (e1.X_op != O_absent && *str == ',') |
| 1897 | { |
| 1898 | int finst = e1.X_add_number; |
| 1899 | |
| 1900 | str = skip_space (str + 1); |
| 1901 | ans = parse_fp_reg (&str, &r1); |
| 1902 | if (ans < 0) |
| 1903 | { |
| 1904 | as_bad ("floating point destination register required"); |
| 1905 | return; |
| 1906 | } |
| 1907 | str = skip_space (str); |
| 1908 | if (*str == ',') |
| 1909 | { |
| 1910 | str++; |
| 1911 | ans = parse_fp_reg (&str, &r2); |
| 1912 | if (ans < 0) |
| 1913 | { |
| 1914 | as_bad ("floating point SourceA register required"); |
| 1915 | return; |
| 1916 | } |
| 1917 | str = skip_space (str); |
| 1918 | if (*str == ',') |
| 1919 | { |
| 1920 | str++; |
| 1921 | ans = parse_fp_reg (&str, &r3); |
| 1922 | if (ans < 0) |
| 1923 | { |
| 1924 | as_bad ("floating point SourceB register required"); |
| 1925 | return; |
| 1926 | } |
| 1927 | |
| 1928 | /* Got immediate and 3 floating regs, |
| 1929 | assemble instruction. */ |
| 1930 | if (finst < 0 || finst > 15) |
| 1931 | as_bad ("finst out of range"); |
| 1932 | |
| 1933 | opcode |= |
| 1934 | ((finst & 0xf) << 27) | (r1 << 10) | (r2 << 16) | (r3 << |
| 1935 | 4); |
| 1936 | } |
| 1937 | else |
| 1938 | { |
| 1939 | as_bad ("floating point SourceB register required"); |
| 1940 | return; |
| 1941 | } |
| 1942 | } |
| 1943 | else |
| 1944 | { |
| 1945 | as_bad ("floating point SourceA register required"); |
| 1946 | return; |
| 1947 | } |
| 1948 | } |
| 1949 | else |
| 1950 | { |
| 1951 | as_bad ("finst missing"); |
| 1952 | return; |
| 1953 | } |
| 1954 | break; |
| 1955 | |
| 1956 | case mode_idfab: |
| 1957 | /* 4-bit immediate * register * float * float |
| 1958 | Example |
| 1959 | fpuread 4,r25,f2,f3 */ |
| 1960 | str = parse_exp (str, &e1); |
| 1961 | str = skip_space (str); |
| 1962 | if (e1.X_op != O_absent && *str == ',') |
| 1963 | { |
| 1964 | int finst = e1.X_add_number; |
| 1965 | |
| 1966 | str = skip_space (str + 1); |
| 1967 | ans = parse_gen_reg (&str, &r1); |
| 1968 | if (ans < 0) |
| 1969 | { |
| 1970 | as_bad ("destination general register required"); |
| 1971 | return; |
| 1972 | } |
| 1973 | str = skip_space (str); |
| 1974 | if (*str == ',') |
| 1975 | { |
| 1976 | str++; |
| 1977 | ans = parse_fp_reg (&str, &r2); |
| 1978 | if (ans < 0) |
| 1979 | { |
| 1980 | as_bad ("floating point SourceA register required"); |
| 1981 | return; |
| 1982 | } |
| 1983 | str = skip_space (str); |
| 1984 | if (*str == ',') |
| 1985 | { |
| 1986 | str++; |
| 1987 | ans = parse_fp_reg (&str, &r3); |
| 1988 | if (ans < 0) |
| 1989 | { |
| 1990 | as_bad ("floating point SourceB register required"); |
| 1991 | return; |
| 1992 | } |
| 1993 | |
| 1994 | /* Got immediate and 3 floating regs, |
| 1995 | assemble instruction. */ |
| 1996 | if (finst < 0 || finst > 15) |
| 1997 | as_bad ("finst out of range"); |
| 1998 | |
| 1999 | opcode |= |
| 2000 | ((finst & 0xf) << 27) | (r1 << 10) | (r2 << 16) | (r3 << |
| 2001 | 4); |
| 2002 | } |
| 2003 | else |
| 2004 | { |
| 2005 | as_bad ("floating point SourceB register required"); |
| 2006 | return; |
| 2007 | } |
| 2008 | } |
| 2009 | else |
| 2010 | { |
| 2011 | as_bad ("floating point SourceA register required"); |
| 2012 | return; |
| 2013 | } |
| 2014 | } |
| 2015 | else |
| 2016 | { |
| 2017 | as_bad ("finst missing"); |
| 2018 | return; |
| 2019 | } |
| 2020 | break; |
| 2021 | |
| 2022 | case mode_fda: |
| 2023 | /* float := float |
| 2024 | Example |
| 2025 | fsqrt f4,f3 */ |
| 2026 | ans = parse_fp_reg (&str, &r1); |
| 2027 | if (ans < 0) |
| 2028 | { |
| 2029 | as_bad ("floating point destination register required"); |
| 2030 | return; |
| 2031 | } |
| 2032 | str = skip_space (str); |
| 2033 | if (*str == ',') |
| 2034 | { |
| 2035 | str++; |
| 2036 | ans = parse_fp_reg (&str, &r2); |
| 2037 | if (ans < 0) |
| 2038 | { |
| 2039 | as_bad ("floating point source register required"); |
| 2040 | return; |
| 2041 | } |
| 2042 | |
| 2043 | /* Got 2 floating regs, assemble instruction. */ |
| 2044 | opcode |= (r1 << 10) | (r2 << 16); |
| 2045 | } |
| 2046 | else |
| 2047 | { |
| 2048 | as_bad ("floating point source register required"); |
| 2049 | return; |
| 2050 | } |
| 2051 | break; |
| 2052 | |
| 2053 | case mode_fdra: |
| 2054 | /* float := register |
| 2055 | Example |
| 2056 | fload f15,r6 */ |
| 2057 | ans = parse_fp_reg (&str, &r1); |
| 2058 | if (ans < 0) |
| 2059 | { |
| 2060 | as_bad ("floating point destination register required"); |
| 2061 | return; |
| 2062 | } |
| 2063 | str = skip_space (str); |
| 2064 | if (*str == ',') |
| 2065 | { |
| 2066 | str++; |
| 2067 | ans = parse_gen_reg (&str, &r2); |
| 2068 | if (ans < 0) |
| 2069 | { |
| 2070 | as_bad ("SourceA general register required"); |
| 2071 | return; |
| 2072 | } |
| 2073 | |
| 2074 | /* Got 2 regs, assemble instruction. */ |
| 2075 | opcode |= (r1 << 10) | (r2 << 16); |
| 2076 | } |
| 2077 | else |
| 2078 | { |
| 2079 | as_bad ("SourceA general register required"); |
| 2080 | return; |
| 2081 | } |
| 2082 | break; |
| 2083 | |
| 2084 | case mode_rdfab: |
| 2085 | /* register := float * float |
| 2086 | Example |
| 2087 | fcmp r0,f4,f8 |
| 2088 | For the GR6, register must be r0 and can be omitted. */ |
| 2089 | ans = parse_gen_reg (&str, &r1); |
| 2090 | if (ans < 0) |
| 2091 | { |
| 2092 | if (visium_opcode_arch == VISIUM_OPCODE_ARCH_GR5) |
| 2093 | { |
| 2094 | as_bad ("Dest general register required"); |
| 2095 | return; |
| 2096 | } |
| 2097 | r1 = 0; |
| 2098 | } |
| 2099 | else |
| 2100 | { |
| 2101 | if (r1 != 0 && visium_opcode_arch != VISIUM_OPCODE_ARCH_GR5) |
| 2102 | { |
| 2103 | as_bad ("FCMP/FCMPE can only use r0 as Dest register"); |
| 2104 | return; |
| 2105 | } |
| 2106 | |
| 2107 | str = skip_space (str); |
| 2108 | if (*str == ',') |
| 2109 | str++; |
| 2110 | else |
| 2111 | { |
| 2112 | as_bad ("floating point SourceA register required"); |
| 2113 | return; |
| 2114 | } |
| 2115 | } |
| 2116 | |
| 2117 | ans = parse_fp_reg (&str, &r2); |
| 2118 | if (ans < 0) |
| 2119 | { |
| 2120 | as_bad ("floating point SourceA register required"); |
| 2121 | return; |
| 2122 | } |
| 2123 | str = skip_space (str); |
| 2124 | if (*str == ',') |
| 2125 | { |
| 2126 | str++; |
| 2127 | ans = parse_fp_reg (&str, &r3); |
| 2128 | if (ans < 0) |
| 2129 | { |
| 2130 | as_bad ("floating point SourceB register required"); |
| 2131 | return; |
| 2132 | } |
| 2133 | |
| 2134 | /* Got 3 regs, assemble instruction. */ |
| 2135 | opcode |= (r1 << 10) | (r2 << 16) | (r3 << 4); |
| 2136 | } |
| 2137 | |
| 2138 | this_dest = r1; |
| 2139 | break; |
| 2140 | |
| 2141 | case mode_rdfa: |
| 2142 | /* register := float |
| 2143 | Example |
| 2144 | fstore r5,f12 */ |
| 2145 | ans = parse_gen_reg (&str, &r1); |
| 2146 | if (ans < 0) |
| 2147 | { |
| 2148 | as_bad ("Dest general register required"); |
| 2149 | return; |
| 2150 | } |
| 2151 | str = skip_space (str); |
| 2152 | if (*str == ',') |
| 2153 | { |
| 2154 | str++; |
| 2155 | ans = parse_fp_reg (&str, &r2); |
| 2156 | if (ans < 0) |
| 2157 | { |
| 2158 | as_bad ("floating point source register required"); |
| 2159 | return; |
| 2160 | } |
| 2161 | |
| 2162 | /* Got 2 regs, assemble instruction. */ |
| 2163 | opcode |= (r1 << 10) | (r2 << 16); |
| 2164 | } |
| 2165 | else |
| 2166 | { |
| 2167 | as_bad ("floating point source register required"); |
| 2168 | return; |
| 2169 | } |
| 2170 | |
| 2171 | this_dest = r1; |
| 2172 | break; |
| 2173 | |
| 2174 | case mode_rrr: |
| 2175 | /* register register register, all sources and destinations |
| 2176 | Example: |
| 2177 | bmd r1,r2,r3 */ |
| 2178 | |
| 2179 | ans = parse_gen_reg (&str, &r1); |
| 2180 | if (ans < 0) |
| 2181 | { |
| 2182 | as_bad ("destination address register required"); |
| 2183 | return; |
| 2184 | } |
| 2185 | str = skip_space (str); |
| 2186 | if (*str == ',') |
| 2187 | { |
| 2188 | str++; |
| 2189 | ans = parse_gen_reg (&str, &r2); |
| 2190 | if (ans < 0) |
| 2191 | { |
| 2192 | as_bad ("source address register required"); |
| 2193 | return; |
| 2194 | } |
| 2195 | str = skip_space (str); |
| 2196 | if (*str == ',') |
| 2197 | { |
| 2198 | str++; |
| 2199 | ans = parse_gen_reg (&str, &r3); |
| 2200 | if (ans < 0) |
| 2201 | { |
| 2202 | as_bad ("count register required"); |
| 2203 | return; |
| 2204 | } |
| 2205 | |
| 2206 | /* We insist on three registers but the opcode can only use |
| 2207 | r1,r2,r3. */ |
| 2208 | if (r1 != 1 || r2 != 2 || r3 != 3) |
| 2209 | { |
| 2210 | as_bad ("BMI/BMD can only use format op r1,r2,r3"); |
| 2211 | return; |
| 2212 | } |
| 2213 | |
| 2214 | /* Opcode is unmodified by what comes out of the table. */ |
| 2215 | } |
| 2216 | else |
| 2217 | { |
| 2218 | as_bad ("register required"); |
| 2219 | return; |
| 2220 | } |
| 2221 | } |
| 2222 | else |
| 2223 | { |
| 2224 | as_bad ("register required"); |
| 2225 | return; |
| 2226 | } |
| 2227 | |
| 2228 | this_dest = r1; |
| 2229 | break; |
| 2230 | |
| 2231 | default: |
| 2232 | break; |
| 2233 | } |
| 2234 | |
| 2235 | if (relax) |
| 2236 | output = frag_var (rs_machine_dependent, 8, 4, relax, e1.X_add_symbol, |
| 2237 | e1.X_add_number, NULL); |
| 2238 | else |
| 2239 | output = frag_more (4); |
| 2240 | |
| 2241 | /* Build the 32-bit instruction in a host-endian-neutral fashion. */ |
| 2242 | output[0] = (opcode >> 24) & 0xff; |
| 2243 | output[1] = (opcode >> 16) & 0xff; |
| 2244 | output[2] = (opcode >> 8) & 0xff; |
| 2245 | output[3] = (opcode >> 0) & 0xff; |
| 2246 | |
| 2247 | if (relax) |
| 2248 | /* The size of the instruction is unknown, so tie the debug info to the |
| 2249 | start of the instruction. */ |
| 2250 | dwarf2_emit_insn (0); |
| 2251 | else |
| 2252 | { |
| 2253 | if (reloc) |
| 2254 | fix_new_exp (frag_now, output - frag_now->fr_literal, 4, &e1, |
| 2255 | reloc == BFD_RELOC_VISIUM_REL16, reloc); |
| 2256 | else |
| 2257 | visium_update_parity_bit (output); |
| 2258 | |
| 2259 | dwarf2_emit_insn (4); |
| 2260 | } |
| 2261 | |
| 2262 | if (*str != '\0') |
| 2263 | as_bad ("junk after instruction"); |
| 2264 | } |
| 2265 | |
| 2266 | void |
| 2267 | visium_cfi_frame_initial_instructions (void) |
| 2268 | { |
| 2269 | /* The CFA is in SP on function entry. */ |
| 2270 | cfi_add_CFA_def_cfa (23, 0); |
| 2271 | } |
| 2272 | |
| 2273 | int |
| 2274 | visium_regname_to_dw2regnum (char *regname) |
| 2275 | { |
| 2276 | if (!regname[0]) |
| 2277 | return -1; |
| 2278 | |
| 2279 | if (regname[0] == 'f' && regname[1] == 'p' && !regname[2]) |
| 2280 | return 22; |
| 2281 | |
| 2282 | if (regname[0] == 's' && regname[1] == 'p' && !regname[2]) |
| 2283 | return 23; |
| 2284 | |
| 2285 | if (regname[0] == 'm' && regname[1] == 'd' && !regname[3]) |
| 2286 | switch (regname[2]) |
| 2287 | { |
| 2288 | case 'b': return 32; |
| 2289 | case 'a': return 33; |
| 2290 | case 'c': return 34; |
| 2291 | default : return -1; |
| 2292 | } |
| 2293 | |
| 2294 | if (regname[0] == 'f' || regname[0] == 'r') |
| 2295 | { |
| 2296 | char *p; |
| 2297 | unsigned int regnum = strtoul (regname + 1, &p, 10); |
| 2298 | if (*p) |
| 2299 | return -1; |
| 2300 | if (regnum >= (regname[0] == 'f' ? 16 : 32)) |
| 2301 | return -1; |
| 2302 | if (regname[0] == 'f') |
| 2303 | regnum += 35; |
| 2304 | return regnum; |
| 2305 | } |
| 2306 | |
| 2307 | return -1; |
| 2308 | } |