| 1 | /* tc-i860.c -- Assembler for the Intel i860 architecture. |
| 2 | Copyright 1989, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2001, 2002, |
| 3 | 2003, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
| 4 | |
| 5 | Brought back from the dead and completely reworked |
| 6 | by Jason Eckhardt <jle@cygnus.com>. |
| 7 | |
| 8 | This file is part of GAS, the GNU Assembler. |
| 9 | |
| 10 | GAS is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 3, or (at your option) |
| 13 | any later version. |
| 14 | |
| 15 | GAS is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License along |
| 21 | with GAS; see the file COPYING. If not, write to the Free Software |
| 22 | Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 23 | |
| 24 | #include "as.h" |
| 25 | #include "safe-ctype.h" |
| 26 | #include "subsegs.h" |
| 27 | #include "opcode/i860.h" |
| 28 | #include "elf/i860.h" |
| 29 | |
| 30 | |
| 31 | /* The opcode hash table. */ |
| 32 | static struct hash_control *op_hash = NULL; |
| 33 | |
| 34 | /* These characters always start a comment. */ |
| 35 | const char comment_chars[] = "#!/"; |
| 36 | |
| 37 | /* These characters start a comment at the beginning of a line. */ |
| 38 | const char line_comment_chars[] = "#/"; |
| 39 | |
| 40 | const char line_separator_chars[] = ";"; |
| 41 | |
| 42 | /* Characters that can be used to separate the mantissa from the exponent |
| 43 | in floating point numbers. */ |
| 44 | const char EXP_CHARS[] = "eE"; |
| 45 | |
| 46 | /* Characters that indicate this number is a floating point constant. |
| 47 | As in 0f12.456 or 0d1.2345e12. */ |
| 48 | const char FLT_CHARS[] = "rRsSfFdDxXpP"; |
| 49 | |
| 50 | /* Register prefix (depends on syntax). */ |
| 51 | static char reg_prefix; |
| 52 | |
| 53 | #define MAX_FIXUPS 2 |
| 54 | |
| 55 | struct i860_it |
| 56 | { |
| 57 | char *error; |
| 58 | unsigned long opcode; |
| 59 | enum expand_type expand; |
| 60 | struct i860_fi |
| 61 | { |
| 62 | expressionS exp; |
| 63 | bfd_reloc_code_real_type reloc; |
| 64 | int pcrel; |
| 65 | valueT fup; |
| 66 | } fi[MAX_FIXUPS]; |
| 67 | } the_insn; |
| 68 | |
| 69 | /* The current fixup count. */ |
| 70 | static int fc; |
| 71 | |
| 72 | static char *expr_end; |
| 73 | |
| 74 | /* Indicates error if a pseudo operation was expanded after a branch. */ |
| 75 | static char last_expand; |
| 76 | |
| 77 | /* If true, then warn if any pseudo operations were expanded. */ |
| 78 | static int target_warn_expand = 0; |
| 79 | |
| 80 | /* If true, then XP support is enabled. */ |
| 81 | static int target_xp = 0; |
| 82 | |
| 83 | /* If true, then Intel syntax is enabled (default to AT&T/SVR4 syntax). */ |
| 84 | static int target_intel_syntax = 0; |
| 85 | |
| 86 | |
| 87 | /* Prototypes. */ |
| 88 | static void i860_process_insn (char *); |
| 89 | static void s_dual (int); |
| 90 | static void s_enddual (int); |
| 91 | static void s_atmp (int); |
| 92 | static void s_align_wrapper (int); |
| 93 | static int i860_get_expression (char *); |
| 94 | static bfd_reloc_code_real_type obtain_reloc_for_imm16 (fixS *, long *); |
| 95 | #ifdef DEBUG_I860 |
| 96 | static void print_insn (struct i860_it *); |
| 97 | #endif |
| 98 | |
| 99 | const pseudo_typeS md_pseudo_table[] = |
| 100 | { |
| 101 | {"align", s_align_wrapper, 0}, |
| 102 | {"dual", s_dual, 0}, |
| 103 | {"enddual", s_enddual, 0}, |
| 104 | {"atmp", s_atmp, 0}, |
| 105 | {NULL, 0, 0}, |
| 106 | }; |
| 107 | |
| 108 | /* Dual-instruction mode handling. */ |
| 109 | enum dual |
| 110 | { |
| 111 | DUAL_OFF = 0, DUAL_ON, DUAL_DDOT, DUAL_ONDDOT, |
| 112 | }; |
| 113 | static enum dual dual_mode = DUAL_OFF; |
| 114 | |
| 115 | /* Handle ".dual" directive. */ |
| 116 | static void |
| 117 | s_dual (int ignore ATTRIBUTE_UNUSED) |
| 118 | { |
| 119 | if (target_intel_syntax) |
| 120 | dual_mode = DUAL_ON; |
| 121 | else |
| 122 | as_bad (_("Directive .dual available only with -mintel-syntax option")); |
| 123 | } |
| 124 | |
| 125 | /* Handle ".enddual" directive. */ |
| 126 | static void |
| 127 | s_enddual (int ignore ATTRIBUTE_UNUSED) |
| 128 | { |
| 129 | if (target_intel_syntax) |
| 130 | dual_mode = DUAL_OFF; |
| 131 | else |
| 132 | as_bad (_("Directive .enddual available only with -mintel-syntax option")); |
| 133 | } |
| 134 | |
| 135 | /* Temporary register used when expanding assembler pseudo operations. */ |
| 136 | static int atmp = 31; |
| 137 | |
| 138 | static void |
| 139 | s_atmp (int ignore ATTRIBUTE_UNUSED) |
| 140 | { |
| 141 | int temp; |
| 142 | |
| 143 | if (! target_intel_syntax) |
| 144 | { |
| 145 | as_bad (_("Directive .atmp available only with -mintel-syntax option")); |
| 146 | demand_empty_rest_of_line (); |
| 147 | return; |
| 148 | } |
| 149 | |
| 150 | if (strncmp (input_line_pointer, "sp", 2) == 0) |
| 151 | { |
| 152 | input_line_pointer += 2; |
| 153 | atmp = 2; |
| 154 | } |
| 155 | else if (strncmp (input_line_pointer, "fp", 2) == 0) |
| 156 | { |
| 157 | input_line_pointer += 2; |
| 158 | atmp = 3; |
| 159 | } |
| 160 | else if (strncmp (input_line_pointer, "r", 1) == 0) |
| 161 | { |
| 162 | input_line_pointer += 1; |
| 163 | temp = get_absolute_expression (); |
| 164 | if (temp >= 0 && temp <= 31) |
| 165 | atmp = temp; |
| 166 | else |
| 167 | as_bad (_("Unknown temporary pseudo register")); |
| 168 | } |
| 169 | else |
| 170 | { |
| 171 | as_bad (_("Unknown temporary pseudo register")); |
| 172 | } |
| 173 | demand_empty_rest_of_line (); |
| 174 | } |
| 175 | |
| 176 | /* Handle ".align" directive depending on syntax mode. |
| 177 | AT&T/SVR4 syntax uses the standard align directive. However, |
| 178 | the Intel syntax additionally allows keywords for the alignment |
| 179 | parameter: ".align type", where type is one of {.short, .long, |
| 180 | .quad, .single, .double} representing alignments of 2, 4, |
| 181 | 16, 4, and 8, respectively. */ |
| 182 | static void |
| 183 | s_align_wrapper (int arg) |
| 184 | { |
| 185 | char *parm = input_line_pointer; |
| 186 | |
| 187 | if (target_intel_syntax) |
| 188 | { |
| 189 | /* Replace a keyword with the equivalent integer so the |
| 190 | standard align routine can parse the directive. */ |
| 191 | if (strncmp (parm, ".short", 6) == 0) |
| 192 | strncpy (parm, " 2", 6); |
| 193 | else if (strncmp (parm, ".long", 5) == 0) |
| 194 | strncpy (parm, " 4", 5); |
| 195 | else if (strncmp (parm, ".quad", 5) == 0) |
| 196 | strncpy (parm, " 16", 5); |
| 197 | else if (strncmp (parm, ".single", 7) == 0) |
| 198 | strncpy (parm, " 4", 7); |
| 199 | else if (strncmp (parm, ".double", 7) == 0) |
| 200 | strncpy (parm, " 8", 7); |
| 201 | |
| 202 | while (*input_line_pointer == ' ') |
| 203 | ++input_line_pointer; |
| 204 | } |
| 205 | |
| 206 | s_align_bytes (arg); |
| 207 | } |
| 208 | |
| 209 | /* This function is called once, at assembler startup time. It should |
| 210 | set up all the tables and data structures that the MD part of the |
| 211 | assembler will need. */ |
| 212 | void |
| 213 | md_begin (void) |
| 214 | { |
| 215 | const char *retval = NULL; |
| 216 | int lose = 0; |
| 217 | unsigned int i = 0; |
| 218 | |
| 219 | op_hash = hash_new (); |
| 220 | |
| 221 | while (i860_opcodes[i].name != NULL) |
| 222 | { |
| 223 | const char *name = i860_opcodes[i].name; |
| 224 | retval = hash_insert (op_hash, name, (void *) &i860_opcodes[i]); |
| 225 | if (retval != NULL) |
| 226 | { |
| 227 | fprintf (stderr, _("internal error: can't hash `%s': %s\n"), |
| 228 | i860_opcodes[i].name, retval); |
| 229 | lose = 1; |
| 230 | } |
| 231 | do |
| 232 | { |
| 233 | if (i860_opcodes[i].match & i860_opcodes[i].lose) |
| 234 | { |
| 235 | fprintf (stderr, |
| 236 | _("internal error: losing opcode: `%s' \"%s\"\n"), |
| 237 | i860_opcodes[i].name, i860_opcodes[i].args); |
| 238 | lose = 1; |
| 239 | } |
| 240 | ++i; |
| 241 | } |
| 242 | while (i860_opcodes[i].name != NULL |
| 243 | && strcmp (i860_opcodes[i].name, name) == 0); |
| 244 | } |
| 245 | |
| 246 | if (lose) |
| 247 | as_fatal (_("Defective assembler. No assembly attempted.")); |
| 248 | |
| 249 | /* Set the register prefix for either Intel or AT&T/SVR4 syntax. */ |
| 250 | reg_prefix = target_intel_syntax ? 0 : '%'; |
| 251 | } |
| 252 | |
| 253 | /* This is the core of the machine-dependent assembler. STR points to a |
| 254 | machine dependent instruction. This function emits the frags/bytes |
| 255 | it assembles to. */ |
| 256 | void |
| 257 | md_assemble (char *str) |
| 258 | { |
| 259 | char *destp; |
| 260 | int num_opcodes = 1; |
| 261 | int i; |
| 262 | struct i860_it pseudo[3]; |
| 263 | |
| 264 | gas_assert (str); |
| 265 | fc = 0; |
| 266 | |
| 267 | /* Assemble the instruction. */ |
| 268 | i860_process_insn (str); |
| 269 | |
| 270 | /* Check for expandable flag to produce pseudo-instructions. This |
| 271 | is an undesirable feature that should be avoided. */ |
| 272 | if (the_insn.expand != 0 && the_insn.expand != XP_ONLY |
| 273 | && ! (the_insn.fi[0].fup & (OP_SEL_HA | OP_SEL_H | OP_SEL_L | OP_SEL_GOT |
| 274 | | OP_SEL_GOTOFF | OP_SEL_PLT))) |
| 275 | { |
| 276 | for (i = 0; i < 3; i++) |
| 277 | pseudo[i] = the_insn; |
| 278 | |
| 279 | fc = 1; |
| 280 | switch (the_insn.expand) |
| 281 | { |
| 282 | |
| 283 | case E_DELAY: |
| 284 | num_opcodes = 1; |
| 285 | break; |
| 286 | |
| 287 | case E_MOV: |
| 288 | if (the_insn.fi[0].exp.X_add_symbol == NULL |
| 289 | && the_insn.fi[0].exp.X_op_symbol == NULL |
| 290 | && (the_insn.fi[0].exp.X_add_number < (1 << 15) |
| 291 | && the_insn.fi[0].exp.X_add_number >= -(1 << 15))) |
| 292 | break; |
| 293 | |
| 294 | /* Emit "or l%const,r0,ireg_dest". */ |
| 295 | pseudo[0].opcode = (the_insn.opcode & 0x001f0000) | 0xe4000000; |
| 296 | pseudo[0].fi[0].fup = (OP_IMM_S16 | OP_SEL_L); |
| 297 | |
| 298 | /* Emit "orh h%const,ireg_dest,ireg_dest". */ |
| 299 | pseudo[1].opcode = (the_insn.opcode & 0x03ffffff) | 0xec000000 |
| 300 | | ((the_insn.opcode & 0x001f0000) << 5); |
| 301 | pseudo[1].fi[0].fup = (OP_IMM_S16 | OP_SEL_H); |
| 302 | |
| 303 | num_opcodes = 2; |
| 304 | break; |
| 305 | |
| 306 | case E_ADDR: |
| 307 | if (the_insn.fi[0].exp.X_add_symbol == NULL |
| 308 | && the_insn.fi[0].exp.X_op_symbol == NULL |
| 309 | && (the_insn.fi[0].exp.X_add_number < (1 << 15) |
| 310 | && the_insn.fi[0].exp.X_add_number >= -(1 << 15))) |
| 311 | break; |
| 312 | |
| 313 | /* Emit "orh ha%addr_expr,ireg_src2,r31". */ |
| 314 | pseudo[0].opcode = 0xec000000 | (the_insn.opcode & 0x03e00000) |
| 315 | | (atmp << 16); |
| 316 | pseudo[0].fi[0].fup = (OP_IMM_S16 | OP_SEL_HA); |
| 317 | |
| 318 | /* Emit "l%addr_expr(r31),ireg_dest". We pick up the fixup |
| 319 | information from the original instruction. */ |
| 320 | pseudo[1].opcode = (the_insn.opcode & ~0x03e00000) | (atmp << 21); |
| 321 | pseudo[1].fi[0].fup = the_insn.fi[0].fup | OP_SEL_L; |
| 322 | |
| 323 | num_opcodes = 2; |
| 324 | break; |
| 325 | |
| 326 | case E_U32: |
| 327 | if (the_insn.fi[0].exp.X_add_symbol == NULL |
| 328 | && the_insn.fi[0].exp.X_op_symbol == NULL |
| 329 | && (the_insn.fi[0].exp.X_add_number < (1 << 16) |
| 330 | && the_insn.fi[0].exp.X_add_number >= 0)) |
| 331 | break; |
| 332 | |
| 333 | /* Emit "$(opcode)h h%const,ireg_src2,r31". */ |
| 334 | pseudo[0].opcode = (the_insn.opcode & 0xf3e0ffff) | 0x0c000000 |
| 335 | | (atmp << 16); |
| 336 | pseudo[0].fi[0].fup = (OP_IMM_S16 | OP_SEL_H); |
| 337 | |
| 338 | /* Emit "$(opcode) l%const,r31,ireg_dest". */ |
| 339 | pseudo[1].opcode = (the_insn.opcode & 0xf01f0000) | 0x04000000 |
| 340 | | (atmp << 21); |
| 341 | pseudo[1].fi[0].fup = (OP_IMM_S16 | OP_SEL_L); |
| 342 | |
| 343 | num_opcodes = 2; |
| 344 | break; |
| 345 | |
| 346 | case E_AND: |
| 347 | if (the_insn.fi[0].exp.X_add_symbol == NULL |
| 348 | && the_insn.fi[0].exp.X_op_symbol == NULL |
| 349 | && (the_insn.fi[0].exp.X_add_number < (1 << 16) |
| 350 | && the_insn.fi[0].exp.X_add_number >= 0)) |
| 351 | break; |
| 352 | |
| 353 | /* Emit "andnot h%const,ireg_src2,r31". */ |
| 354 | pseudo[0].opcode = (the_insn.opcode & 0x03e0ffff) | 0xd4000000 |
| 355 | | (atmp << 16); |
| 356 | pseudo[0].fi[0].fup = (OP_IMM_S16 | OP_SEL_H); |
| 357 | pseudo[0].fi[0].exp.X_add_number = |
| 358 | -1 - the_insn.fi[0].exp.X_add_number; |
| 359 | |
| 360 | /* Emit "andnot l%const,r31,ireg_dest". */ |
| 361 | pseudo[1].opcode = (the_insn.opcode & 0x001f0000) | 0xd4000000 |
| 362 | | (atmp << 21); |
| 363 | pseudo[1].fi[0].fup = (OP_IMM_S16 | OP_SEL_L); |
| 364 | pseudo[1].fi[0].exp.X_add_number = |
| 365 | -1 - the_insn.fi[0].exp.X_add_number; |
| 366 | |
| 367 | num_opcodes = 2; |
| 368 | break; |
| 369 | |
| 370 | case E_S32: |
| 371 | if (the_insn.fi[0].exp.X_add_symbol == NULL |
| 372 | && the_insn.fi[0].exp.X_op_symbol == NULL |
| 373 | && (the_insn.fi[0].exp.X_add_number < (1 << 15) |
| 374 | && the_insn.fi[0].exp.X_add_number >= -(1 << 15))) |
| 375 | break; |
| 376 | |
| 377 | /* Emit "orh h%const,r0,r31". */ |
| 378 | pseudo[0].opcode = 0xec000000 | (atmp << 16); |
| 379 | pseudo[0].fi[0].fup = (OP_IMM_S16 | OP_SEL_H); |
| 380 | |
| 381 | /* Emit "or l%const,r31,r31". */ |
| 382 | pseudo[1].opcode = 0xe4000000 | (atmp << 21) | (atmp << 16); |
| 383 | pseudo[1].fi[0].fup = (OP_IMM_S16 | OP_SEL_L); |
| 384 | |
| 385 | /* Emit "r31,ireg_src2,ireg_dest". */ |
| 386 | pseudo[2].opcode = (the_insn.opcode & ~0x0400ffff) | (atmp << 11); |
| 387 | pseudo[2].fi[0].fup = OP_IMM_S16; |
| 388 | |
| 389 | num_opcodes = 3; |
| 390 | break; |
| 391 | |
| 392 | default: |
| 393 | as_fatal (_("failed sanity check.")); |
| 394 | } |
| 395 | |
| 396 | the_insn = pseudo[0]; |
| 397 | |
| 398 | /* Warn if an opcode is expanded after a delayed branch. */ |
| 399 | if (num_opcodes > 1 && last_expand == 1) |
| 400 | as_warn (_("Expanded opcode after delayed branch: `%s'"), str); |
| 401 | |
| 402 | /* Warn if an opcode is expanded in dual mode. */ |
| 403 | if (num_opcodes > 1 && dual_mode != DUAL_OFF) |
| 404 | as_warn (_("Expanded opcode in dual mode: `%s'"), str); |
| 405 | |
| 406 | /* Notify if any expansions happen. */ |
| 407 | if (target_warn_expand && num_opcodes > 1) |
| 408 | as_warn (_("An instruction was expanded (%s)"), str); |
| 409 | } |
| 410 | |
| 411 | dwarf2_emit_insn (0); |
| 412 | i = 0; |
| 413 | do |
| 414 | { |
| 415 | int tmp; |
| 416 | |
| 417 | /* Output the opcode. Note that the i860 always reads instructions |
| 418 | as little-endian data. */ |
| 419 | destp = frag_more (4); |
| 420 | number_to_chars_littleendian (destp, the_insn.opcode, 4); |
| 421 | |
| 422 | /* Check for expanded opcode after branch or in dual mode. */ |
| 423 | last_expand = the_insn.fi[0].pcrel; |
| 424 | |
| 425 | /* Output the symbol-dependent stuff. Only btne and bte will ever |
| 426 | loop more than once here, since only they (possibly) have more |
| 427 | than one fixup. */ |
| 428 | for (tmp = 0; tmp < fc; tmp++) |
| 429 | { |
| 430 | if (the_insn.fi[tmp].fup != OP_NONE) |
| 431 | { |
| 432 | fixS *fix; |
| 433 | fix = fix_new_exp (frag_now, |
| 434 | destp - frag_now->fr_literal, |
| 435 | 4, |
| 436 | &the_insn.fi[tmp].exp, |
| 437 | the_insn.fi[tmp].pcrel, |
| 438 | the_insn.fi[tmp].reloc); |
| 439 | |
| 440 | /* Despite the odd name, this is a scratch field. We use |
| 441 | it to encode operand type information. */ |
| 442 | fix->fx_addnumber = the_insn.fi[tmp].fup; |
| 443 | } |
| 444 | } |
| 445 | the_insn = pseudo[++i]; |
| 446 | } |
| 447 | while (--num_opcodes > 0); |
| 448 | |
| 449 | } |
| 450 | |
| 451 | /* Assemble the instruction pointed to by STR. */ |
| 452 | static void |
| 453 | i860_process_insn (char *str) |
| 454 | { |
| 455 | char *s; |
| 456 | const char *args; |
| 457 | char c; |
| 458 | struct i860_opcode *insn; |
| 459 | char *args_start; |
| 460 | unsigned long opcode; |
| 461 | unsigned int mask; |
| 462 | int match = 0; |
| 463 | int comma = 0; |
| 464 | |
| 465 | #if 1 /* For compiler warnings. */ |
| 466 | args = 0; |
| 467 | insn = 0; |
| 468 | args_start = 0; |
| 469 | opcode = 0; |
| 470 | #endif |
| 471 | |
| 472 | for (s = str; ISLOWER (*s) || *s == '.' || *s == '3' |
| 473 | || *s == '2' || *s == '1'; ++s) |
| 474 | ; |
| 475 | |
| 476 | switch (*s) |
| 477 | { |
| 478 | case '\0': |
| 479 | break; |
| 480 | |
| 481 | case ',': |
| 482 | comma = 1; |
| 483 | |
| 484 | /*FALLTHROUGH*/ |
| 485 | |
| 486 | case ' ': |
| 487 | *s++ = '\0'; |
| 488 | break; |
| 489 | |
| 490 | default: |
| 491 | as_fatal (_("Unknown opcode: `%s'"), str); |
| 492 | } |
| 493 | |
| 494 | /* Check for dual mode ("d.") opcode prefix. */ |
| 495 | if (strncmp (str, "d.", 2) == 0) |
| 496 | { |
| 497 | if (dual_mode == DUAL_ON) |
| 498 | dual_mode = DUAL_ONDDOT; |
| 499 | else |
| 500 | dual_mode = DUAL_DDOT; |
| 501 | str += 2; |
| 502 | } |
| 503 | |
| 504 | if ((insn = (struct i860_opcode *) hash_find (op_hash, str)) == NULL) |
| 505 | { |
| 506 | if (dual_mode == DUAL_DDOT || dual_mode == DUAL_ONDDOT) |
| 507 | str -= 2; |
| 508 | as_bad (_("Unknown opcode: `%s'"), str); |
| 509 | return; |
| 510 | } |
| 511 | |
| 512 | if (comma) |
| 513 | *--s = ','; |
| 514 | |
| 515 | args_start = s; |
| 516 | for (;;) |
| 517 | { |
| 518 | int t; |
| 519 | opcode = insn->match; |
| 520 | memset (&the_insn, '\0', sizeof (the_insn)); |
| 521 | fc = 0; |
| 522 | for (t = 0; t < MAX_FIXUPS; t++) |
| 523 | { |
| 524 | the_insn.fi[t].reloc = BFD_RELOC_NONE; |
| 525 | the_insn.fi[t].pcrel = 0; |
| 526 | the_insn.fi[t].fup = OP_NONE; |
| 527 | } |
| 528 | |
| 529 | /* Build the opcode, checking as we go that the operands match. */ |
| 530 | for (args = insn->args; ; ++args) |
| 531 | { |
| 532 | if (fc > MAX_FIXUPS) |
| 533 | abort (); |
| 534 | |
| 535 | switch (*args) |
| 536 | { |
| 537 | |
| 538 | /* End of args. */ |
| 539 | case '\0': |
| 540 | if (*s == '\0') |
| 541 | match = 1; |
| 542 | break; |
| 543 | |
| 544 | /* These must match exactly. */ |
| 545 | case '+': |
| 546 | case '(': |
| 547 | case ')': |
| 548 | case ',': |
| 549 | case ' ': |
| 550 | if (*s++ == *args) |
| 551 | continue; |
| 552 | break; |
| 553 | |
| 554 | /* Must be at least one digit. */ |
| 555 | case '#': |
| 556 | if (ISDIGIT (*s++)) |
| 557 | { |
| 558 | while (ISDIGIT (*s)) |
| 559 | ++s; |
| 560 | continue; |
| 561 | } |
| 562 | break; |
| 563 | |
| 564 | /* Next operand must be a register. */ |
| 565 | case '1': |
| 566 | case '2': |
| 567 | case 'd': |
| 568 | /* Check for register prefix if necessary. */ |
| 569 | if (reg_prefix && *s != reg_prefix) |
| 570 | goto error; |
| 571 | else if (reg_prefix) |
| 572 | s++; |
| 573 | |
| 574 | switch (*s) |
| 575 | { |
| 576 | /* Frame pointer. */ |
| 577 | case 'f': |
| 578 | s++; |
| 579 | if (*s++ == 'p') |
| 580 | { |
| 581 | mask = 0x3; |
| 582 | break; |
| 583 | } |
| 584 | goto error; |
| 585 | |
| 586 | /* Stack pointer. */ |
| 587 | case 's': |
| 588 | s++; |
| 589 | if (*s++ == 'p') |
| 590 | { |
| 591 | mask = 0x2; |
| 592 | break; |
| 593 | } |
| 594 | goto error; |
| 595 | |
| 596 | /* Any register r0..r31. */ |
| 597 | case 'r': |
| 598 | s++; |
| 599 | if (!ISDIGIT (c = *s++)) |
| 600 | { |
| 601 | goto error; |
| 602 | } |
| 603 | if (ISDIGIT (*s)) |
| 604 | { |
| 605 | if ((c = 10 * (c - '0') + (*s++ - '0')) >= 32) |
| 606 | goto error; |
| 607 | } |
| 608 | else |
| 609 | c -= '0'; |
| 610 | mask = c; |
| 611 | break; |
| 612 | |
| 613 | /* Not this opcode. */ |
| 614 | default: |
| 615 | goto error; |
| 616 | } |
| 617 | |
| 618 | /* Obtained the register, now place it in the opcode. */ |
| 619 | switch (*args) |
| 620 | { |
| 621 | case '1': |
| 622 | opcode |= mask << 11; |
| 623 | continue; |
| 624 | |
| 625 | case '2': |
| 626 | opcode |= mask << 21; |
| 627 | continue; |
| 628 | |
| 629 | case 'd': |
| 630 | opcode |= mask << 16; |
| 631 | continue; |
| 632 | |
| 633 | } |
| 634 | break; |
| 635 | |
| 636 | /* Next operand is a floating point register. */ |
| 637 | case 'e': |
| 638 | case 'f': |
| 639 | case 'g': |
| 640 | /* Check for register prefix if necessary. */ |
| 641 | if (reg_prefix && *s != reg_prefix) |
| 642 | goto error; |
| 643 | else if (reg_prefix) |
| 644 | s++; |
| 645 | |
| 646 | if (*s++ == 'f' && ISDIGIT (*s)) |
| 647 | { |
| 648 | mask = *s++; |
| 649 | if (ISDIGIT (*s)) |
| 650 | { |
| 651 | mask = 10 * (mask - '0') + (*s++ - '0'); |
| 652 | if (mask >= 32) |
| 653 | { |
| 654 | break; |
| 655 | } |
| 656 | } |
| 657 | else |
| 658 | mask -= '0'; |
| 659 | |
| 660 | switch (*args) |
| 661 | { |
| 662 | |
| 663 | case 'e': |
| 664 | opcode |= mask << 11; |
| 665 | continue; |
| 666 | |
| 667 | case 'f': |
| 668 | opcode |= mask << 21; |
| 669 | continue; |
| 670 | |
| 671 | case 'g': |
| 672 | opcode |= mask << 16; |
| 673 | if ((opcode & (1 << 10)) && mask != 0 |
| 674 | && (mask == ((opcode >> 11) & 0x1f))) |
| 675 | as_warn (_("Pipelined instruction: fsrc1 = fdest")); |
| 676 | continue; |
| 677 | } |
| 678 | } |
| 679 | break; |
| 680 | |
| 681 | /* Next operand must be a control register. */ |
| 682 | case 'c': |
| 683 | /* Check for register prefix if necessary. */ |
| 684 | if (reg_prefix && *s != reg_prefix) |
| 685 | goto error; |
| 686 | else if (reg_prefix) |
| 687 | s++; |
| 688 | |
| 689 | if (strncmp (s, "fir", 3) == 0) |
| 690 | { |
| 691 | opcode |= 0x0 << 21; |
| 692 | s += 3; |
| 693 | continue; |
| 694 | } |
| 695 | if (strncmp (s, "psr", 3) == 0) |
| 696 | { |
| 697 | opcode |= 0x1 << 21; |
| 698 | s += 3; |
| 699 | continue; |
| 700 | } |
| 701 | if (strncmp (s, "dirbase", 7) == 0) |
| 702 | { |
| 703 | opcode |= 0x2 << 21; |
| 704 | s += 7; |
| 705 | continue; |
| 706 | } |
| 707 | if (strncmp (s, "db", 2) == 0) |
| 708 | { |
| 709 | opcode |= 0x3 << 21; |
| 710 | s += 2; |
| 711 | continue; |
| 712 | } |
| 713 | if (strncmp (s, "fsr", 3) == 0) |
| 714 | { |
| 715 | opcode |= 0x4 << 21; |
| 716 | s += 3; |
| 717 | continue; |
| 718 | } |
| 719 | if (strncmp (s, "epsr", 4) == 0) |
| 720 | { |
| 721 | opcode |= 0x5 << 21; |
| 722 | s += 4; |
| 723 | continue; |
| 724 | } |
| 725 | /* The remaining control registers are XP only. */ |
| 726 | if (target_xp && strncmp (s, "bear", 4) == 0) |
| 727 | { |
| 728 | opcode |= 0x6 << 21; |
| 729 | s += 4; |
| 730 | continue; |
| 731 | } |
| 732 | if (target_xp && strncmp (s, "ccr", 3) == 0) |
| 733 | { |
| 734 | opcode |= 0x7 << 21; |
| 735 | s += 3; |
| 736 | continue; |
| 737 | } |
| 738 | if (target_xp && strncmp (s, "p0", 2) == 0) |
| 739 | { |
| 740 | opcode |= 0x8 << 21; |
| 741 | s += 2; |
| 742 | continue; |
| 743 | } |
| 744 | if (target_xp && strncmp (s, "p1", 2) == 0) |
| 745 | { |
| 746 | opcode |= 0x9 << 21; |
| 747 | s += 2; |
| 748 | continue; |
| 749 | } |
| 750 | if (target_xp && strncmp (s, "p2", 2) == 0) |
| 751 | { |
| 752 | opcode |= 0xa << 21; |
| 753 | s += 2; |
| 754 | continue; |
| 755 | } |
| 756 | if (target_xp && strncmp (s, "p3", 2) == 0) |
| 757 | { |
| 758 | opcode |= 0xb << 21; |
| 759 | s += 2; |
| 760 | continue; |
| 761 | } |
| 762 | break; |
| 763 | |
| 764 | /* 5-bit immediate in src1. */ |
| 765 | case '5': |
| 766 | if (! i860_get_expression (s)) |
| 767 | { |
| 768 | s = expr_end; |
| 769 | the_insn.fi[fc].fup |= OP_IMM_U5; |
| 770 | fc++; |
| 771 | continue; |
| 772 | } |
| 773 | break; |
| 774 | |
| 775 | /* 26-bit immediate, relative branch (lbroff). */ |
| 776 | case 'l': |
| 777 | the_insn.fi[fc].pcrel = 1; |
| 778 | the_insn.fi[fc].fup |= OP_IMM_BR26; |
| 779 | goto immediate; |
| 780 | |
| 781 | /* 16-bit split immediate, relative branch (sbroff). */ |
| 782 | case 'r': |
| 783 | the_insn.fi[fc].pcrel = 1; |
| 784 | the_insn.fi[fc].fup |= OP_IMM_BR16; |
| 785 | goto immediate; |
| 786 | |
| 787 | /* 16-bit split immediate. */ |
| 788 | case 's': |
| 789 | the_insn.fi[fc].fup |= OP_IMM_SPLIT16; |
| 790 | goto immediate; |
| 791 | |
| 792 | /* 16-bit split immediate, byte aligned (st.b). */ |
| 793 | case 'S': |
| 794 | the_insn.fi[fc].fup |= OP_IMM_SPLIT16; |
| 795 | goto immediate; |
| 796 | |
| 797 | /* 16-bit split immediate, half-word aligned (st.s). */ |
| 798 | case 'T': |
| 799 | the_insn.fi[fc].fup |= (OP_IMM_SPLIT16 | OP_ENCODE1 | OP_ALIGN2); |
| 800 | goto immediate; |
| 801 | |
| 802 | /* 16-bit split immediate, word aligned (st.l). */ |
| 803 | case 'U': |
| 804 | the_insn.fi[fc].fup |= (OP_IMM_SPLIT16 | OP_ENCODE1 | OP_ALIGN4); |
| 805 | goto immediate; |
| 806 | |
| 807 | /* 16-bit immediate. */ |
| 808 | case 'i': |
| 809 | the_insn.fi[fc].fup |= OP_IMM_S16; |
| 810 | goto immediate; |
| 811 | |
| 812 | /* 16-bit immediate, byte aligned (ld.b). */ |
| 813 | case 'I': |
| 814 | the_insn.fi[fc].fup |= OP_IMM_S16; |
| 815 | goto immediate; |
| 816 | |
| 817 | /* 16-bit immediate, half-word aligned (ld.s). */ |
| 818 | case 'J': |
| 819 | the_insn.fi[fc].fup |= (OP_IMM_S16 | OP_ENCODE1 | OP_ALIGN2); |
| 820 | goto immediate; |
| 821 | |
| 822 | /* 16-bit immediate, word aligned (ld.l, {p}fld.l, fst.l). */ |
| 823 | case 'K': |
| 824 | if (insn->name[0] == 'l') |
| 825 | the_insn.fi[fc].fup |= (OP_IMM_S16 | OP_ENCODE1 | OP_ALIGN4); |
| 826 | else |
| 827 | the_insn.fi[fc].fup |= (OP_IMM_S16 | OP_ENCODE2 | OP_ALIGN4); |
| 828 | goto immediate; |
| 829 | |
| 830 | /* 16-bit immediate, double-word aligned ({p}fld.d, fst.d). */ |
| 831 | case 'L': |
| 832 | the_insn.fi[fc].fup |= (OP_IMM_S16 | OP_ENCODE3 | OP_ALIGN8); |
| 833 | goto immediate; |
| 834 | |
| 835 | /* 16-bit immediate, quad-word aligned (fld.q, fst.q). */ |
| 836 | case 'M': |
| 837 | the_insn.fi[fc].fup |= (OP_IMM_S16 | OP_ENCODE3 | OP_ALIGN16); |
| 838 | |
| 839 | /*FALLTHROUGH*/ |
| 840 | |
| 841 | /* Handle the immediate for either the Intel syntax or |
| 842 | SVR4 syntax. The Intel syntax is "ha%immediate" |
| 843 | whereas SVR4 syntax is "[immediate]@ha". */ |
| 844 | immediate: |
| 845 | if (target_intel_syntax == 0) |
| 846 | { |
| 847 | /* AT&T/SVR4 syntax. */ |
| 848 | if (*s == ' ') |
| 849 | s++; |
| 850 | |
| 851 | /* Note that if i860_get_expression() fails, we will still |
| 852 | have created U entries in the symbol table for the |
| 853 | 'symbols' in the input string. Try not to create U |
| 854 | symbols for registers, etc. */ |
| 855 | if (! i860_get_expression (s)) |
| 856 | s = expr_end; |
| 857 | else |
| 858 | goto error; |
| 859 | |
| 860 | if (strncmp (s, "@ha", 3) == 0) |
| 861 | { |
| 862 | the_insn.fi[fc].fup |= OP_SEL_HA; |
| 863 | s += 3; |
| 864 | } |
| 865 | else if (strncmp (s, "@h", 2) == 0) |
| 866 | { |
| 867 | the_insn.fi[fc].fup |= OP_SEL_H; |
| 868 | s += 2; |
| 869 | } |
| 870 | else if (strncmp (s, "@l", 2) == 0) |
| 871 | { |
| 872 | the_insn.fi[fc].fup |= OP_SEL_L; |
| 873 | s += 2; |
| 874 | } |
| 875 | else if (strncmp (s, "@gotoff", 7) == 0 |
| 876 | || strncmp (s, "@GOTOFF", 7) == 0) |
| 877 | { |
| 878 | as_bad (_("Assembler does not yet support PIC")); |
| 879 | the_insn.fi[fc].fup |= OP_SEL_GOTOFF; |
| 880 | s += 7; |
| 881 | } |
| 882 | else if (strncmp (s, "@got", 4) == 0 |
| 883 | || strncmp (s, "@GOT", 4) == 0) |
| 884 | { |
| 885 | as_bad (_("Assembler does not yet support PIC")); |
| 886 | the_insn.fi[fc].fup |= OP_SEL_GOT; |
| 887 | s += 4; |
| 888 | } |
| 889 | else if (strncmp (s, "@plt", 4) == 0 |
| 890 | || strncmp (s, "@PLT", 4) == 0) |
| 891 | { |
| 892 | as_bad (_("Assembler does not yet support PIC")); |
| 893 | the_insn.fi[fc].fup |= OP_SEL_PLT; |
| 894 | s += 4; |
| 895 | } |
| 896 | |
| 897 | the_insn.expand = insn->expand; |
| 898 | fc++; |
| 899 | |
| 900 | continue; |
| 901 | } |
| 902 | else |
| 903 | { |
| 904 | /* Intel syntax. */ |
| 905 | if (*s == ' ') |
| 906 | s++; |
| 907 | if (strncmp (s, "ha%", 3) == 0) |
| 908 | { |
| 909 | the_insn.fi[fc].fup |= OP_SEL_HA; |
| 910 | s += 3; |
| 911 | } |
| 912 | else if (strncmp (s, "h%", 2) == 0) |
| 913 | { |
| 914 | the_insn.fi[fc].fup |= OP_SEL_H; |
| 915 | s += 2; |
| 916 | } |
| 917 | else if (strncmp (s, "l%", 2) == 0) |
| 918 | { |
| 919 | the_insn.fi[fc].fup |= OP_SEL_L; |
| 920 | s += 2; |
| 921 | } |
| 922 | the_insn.expand = insn->expand; |
| 923 | |
| 924 | /* Note that if i860_get_expression() fails, we will still |
| 925 | have created U entries in the symbol table for the |
| 926 | 'symbols' in the input string. Try not to create U |
| 927 | symbols for registers, etc. */ |
| 928 | if (! i860_get_expression (s)) |
| 929 | s = expr_end; |
| 930 | else |
| 931 | goto error; |
| 932 | |
| 933 | fc++; |
| 934 | continue; |
| 935 | } |
| 936 | break; |
| 937 | |
| 938 | default: |
| 939 | as_fatal (_("failed sanity check.")); |
| 940 | } |
| 941 | break; |
| 942 | } |
| 943 | error: |
| 944 | if (match == 0) |
| 945 | { |
| 946 | /* Args don't match. */ |
| 947 | if (insn[1].name != NULL |
| 948 | && ! strcmp (insn->name, insn[1].name)) |
| 949 | { |
| 950 | ++insn; |
| 951 | s = args_start; |
| 952 | continue; |
| 953 | } |
| 954 | else |
| 955 | { |
| 956 | as_bad (_("Illegal operands for %s"), insn->name); |
| 957 | return; |
| 958 | } |
| 959 | } |
| 960 | break; |
| 961 | } |
| 962 | |
| 963 | /* Set the dual bit on this instruction if necessary. */ |
| 964 | if (dual_mode != DUAL_OFF) |
| 965 | { |
| 966 | if ((opcode & 0xfc000000) == 0x48000000 || opcode == 0xb0000000) |
| 967 | { |
| 968 | /* The instruction is a flop or a fnop, so set its dual bit |
| 969 | (but check that it is 8-byte aligned). */ |
| 970 | if (((frag_now->fr_address + frag_now_fix_octets ()) & 7) == 0) |
| 971 | opcode |= (1 << 9); |
| 972 | else |
| 973 | as_bad (_("'d.%s' must be 8-byte aligned"), insn->name); |
| 974 | |
| 975 | if (dual_mode == DUAL_DDOT) |
| 976 | dual_mode = DUAL_OFF; |
| 977 | else if (dual_mode == DUAL_ONDDOT) |
| 978 | dual_mode = DUAL_ON; |
| 979 | } |
| 980 | else if (dual_mode == DUAL_DDOT || dual_mode == DUAL_ONDDOT) |
| 981 | as_bad (_("Prefix 'd.' invalid for instruction `%s'"), insn->name); |
| 982 | } |
| 983 | |
| 984 | the_insn.opcode = opcode; |
| 985 | |
| 986 | /* Only recognize XP instructions when the user has requested it. */ |
| 987 | if (insn->expand == XP_ONLY && ! target_xp) |
| 988 | as_bad (_("Unknown opcode: `%s'"), insn->name); |
| 989 | } |
| 990 | |
| 991 | static int |
| 992 | i860_get_expression (char *str) |
| 993 | { |
| 994 | char *save_in; |
| 995 | segT seg; |
| 996 | |
| 997 | save_in = input_line_pointer; |
| 998 | input_line_pointer = str; |
| 999 | seg = expression (&the_insn.fi[fc].exp); |
| 1000 | if (seg != absolute_section |
| 1001 | && seg != undefined_section |
| 1002 | && ! SEG_NORMAL (seg)) |
| 1003 | { |
| 1004 | the_insn.error = _("bad segment"); |
| 1005 | expr_end = input_line_pointer; |
| 1006 | input_line_pointer = save_in; |
| 1007 | return 1; |
| 1008 | } |
| 1009 | expr_end = input_line_pointer; |
| 1010 | input_line_pointer = save_in; |
| 1011 | return 0; |
| 1012 | } |
| 1013 | |
| 1014 | char * |
| 1015 | md_atof (int type, char *litP, int *sizeP) |
| 1016 | { |
| 1017 | return ieee_md_atof (type, litP, sizeP, TRUE); |
| 1018 | } |
| 1019 | |
| 1020 | /* Write out in current endian mode. */ |
| 1021 | void |
| 1022 | md_number_to_chars (char *buf, valueT val, int n) |
| 1023 | { |
| 1024 | if (target_big_endian) |
| 1025 | number_to_chars_bigendian (buf, val, n); |
| 1026 | else |
| 1027 | number_to_chars_littleendian (buf, val, n); |
| 1028 | } |
| 1029 | |
| 1030 | /* This should never be called for i860. */ |
| 1031 | int |
| 1032 | md_estimate_size_before_relax (register fragS *fragP ATTRIBUTE_UNUSED, |
| 1033 | segT segtype ATTRIBUTE_UNUSED) |
| 1034 | { |
| 1035 | as_fatal (_("relaxation not supported\n")); |
| 1036 | } |
| 1037 | |
| 1038 | #ifdef DEBUG_I860 |
| 1039 | static void |
| 1040 | print_insn (struct i860_it *insn) |
| 1041 | { |
| 1042 | if (insn->error) |
| 1043 | fprintf (stderr, "ERROR: %s\n", insn->error); |
| 1044 | |
| 1045 | fprintf (stderr, "opcode = 0x%08lx\t", insn->opcode); |
| 1046 | fprintf (stderr, "expand = 0x%x\t", insn->expand); |
| 1047 | fprintf (stderr, "reloc = %s\t\n", |
| 1048 | bfd_get_reloc_code_name (insn->reloc)); |
| 1049 | fprintf (stderr, "exp = {\n"); |
| 1050 | fprintf (stderr, "\t\tX_add_symbol = %s\n", |
| 1051 | insn->exp.X_add_symbol ? |
| 1052 | (S_GET_NAME (insn->exp.X_add_symbol) ? |
| 1053 | S_GET_NAME (insn->exp.X_add_symbol) : "???") : "0"); |
| 1054 | fprintf (stderr, "\t\tX_op_symbol = %s\n", |
| 1055 | insn->exp.X_op_symbol ? |
| 1056 | (S_GET_NAME (insn->exp.X_op_symbol) ? |
| 1057 | S_GET_NAME (insn->exp.X_op_symbol) : "???") : "0"); |
| 1058 | fprintf (stderr, "\t\tX_add_number = %lx\n", |
| 1059 | insn->exp.X_add_number); |
| 1060 | fprintf (stderr, "}\n"); |
| 1061 | } |
| 1062 | #endif /* DEBUG_I860 */ |
| 1063 | |
| 1064 | \f |
| 1065 | #ifdef OBJ_ELF |
| 1066 | const char *md_shortopts = "VQ:"; |
| 1067 | #else |
| 1068 | const char *md_shortopts = ""; |
| 1069 | #endif |
| 1070 | |
| 1071 | #define OPTION_EB (OPTION_MD_BASE + 0) |
| 1072 | #define OPTION_EL (OPTION_MD_BASE + 1) |
| 1073 | #define OPTION_WARN_EXPAND (OPTION_MD_BASE + 2) |
| 1074 | #define OPTION_XP (OPTION_MD_BASE + 3) |
| 1075 | #define OPTION_INTEL_SYNTAX (OPTION_MD_BASE + 4) |
| 1076 | |
| 1077 | struct option md_longopts[] = { |
| 1078 | { "EB", no_argument, NULL, OPTION_EB }, |
| 1079 | { "EL", no_argument, NULL, OPTION_EL }, |
| 1080 | { "mwarn-expand", no_argument, NULL, OPTION_WARN_EXPAND }, |
| 1081 | { "mxp", no_argument, NULL, OPTION_XP }, |
| 1082 | { "mintel-syntax",no_argument, NULL, OPTION_INTEL_SYNTAX }, |
| 1083 | { NULL, no_argument, NULL, 0 } |
| 1084 | }; |
| 1085 | size_t md_longopts_size = sizeof (md_longopts); |
| 1086 | |
| 1087 | int |
| 1088 | md_parse_option (int c, char *arg ATTRIBUTE_UNUSED) |
| 1089 | { |
| 1090 | switch (c) |
| 1091 | { |
| 1092 | case OPTION_EB: |
| 1093 | target_big_endian = 1; |
| 1094 | break; |
| 1095 | |
| 1096 | case OPTION_EL: |
| 1097 | target_big_endian = 0; |
| 1098 | break; |
| 1099 | |
| 1100 | case OPTION_WARN_EXPAND: |
| 1101 | target_warn_expand = 1; |
| 1102 | break; |
| 1103 | |
| 1104 | case OPTION_XP: |
| 1105 | target_xp = 1; |
| 1106 | break; |
| 1107 | |
| 1108 | case OPTION_INTEL_SYNTAX: |
| 1109 | target_intel_syntax = 1; |
| 1110 | break; |
| 1111 | |
| 1112 | #ifdef OBJ_ELF |
| 1113 | /* SVR4 argument compatibility (-V): print version ID. */ |
| 1114 | case 'V': |
| 1115 | print_version_id (); |
| 1116 | break; |
| 1117 | |
| 1118 | /* SVR4 argument compatibility (-Qy, -Qn): controls whether |
| 1119 | a .comment section should be emitted or not (ignored). */ |
| 1120 | case 'Q': |
| 1121 | break; |
| 1122 | #endif |
| 1123 | |
| 1124 | default: |
| 1125 | return 0; |
| 1126 | } |
| 1127 | |
| 1128 | return 1; |
| 1129 | } |
| 1130 | |
| 1131 | void |
| 1132 | md_show_usage (FILE *stream) |
| 1133 | { |
| 1134 | fprintf (stream, _("\ |
| 1135 | -EL generate code for little endian mode (default)\n\ |
| 1136 | -EB generate code for big endian mode\n\ |
| 1137 | -mwarn-expand warn if pseudo operations are expanded\n\ |
| 1138 | -mxp enable i860XP support (disabled by default)\n\ |
| 1139 | -mintel-syntax enable Intel syntax (default to AT&T/SVR4)\n")); |
| 1140 | #ifdef OBJ_ELF |
| 1141 | /* SVR4 compatibility flags. */ |
| 1142 | fprintf (stream, _("\ |
| 1143 | -V print assembler version number\n\ |
| 1144 | -Qy, -Qn ignored\n")); |
| 1145 | #endif |
| 1146 | } |
| 1147 | |
| 1148 | \f |
| 1149 | /* We have no need to default values of symbols. */ |
| 1150 | symbolS * |
| 1151 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) |
| 1152 | { |
| 1153 | return 0; |
| 1154 | } |
| 1155 | |
| 1156 | /* The i860 denotes auto-increment with '++'. */ |
| 1157 | void |
| 1158 | md_operand (expressionS *exp) |
| 1159 | { |
| 1160 | char *s; |
| 1161 | |
| 1162 | for (s = input_line_pointer; *s; s++) |
| 1163 | { |
| 1164 | if (s[0] == '+' && s[1] == '+') |
| 1165 | { |
| 1166 | input_line_pointer += 2; |
| 1167 | exp->X_op = O_register; |
| 1168 | break; |
| 1169 | } |
| 1170 | } |
| 1171 | } |
| 1172 | |
| 1173 | /* Round up a section size to the appropriate boundary. */ |
| 1174 | valueT |
| 1175 | md_section_align (segT segment ATTRIBUTE_UNUSED, |
| 1176 | valueT size ATTRIBUTE_UNUSED) |
| 1177 | { |
| 1178 | /* Byte alignment is fine. */ |
| 1179 | return size; |
| 1180 | } |
| 1181 | |
| 1182 | /* On the i860, a PC-relative offset is relative to the address of the |
| 1183 | offset plus its size. */ |
| 1184 | long |
| 1185 | md_pcrel_from (fixS *fixP) |
| 1186 | { |
| 1187 | return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address; |
| 1188 | } |
| 1189 | |
| 1190 | /* Determine the relocation needed for non PC-relative 16-bit immediates. |
| 1191 | Also adjust the given immediate as necessary. Finally, check that |
| 1192 | all constraints (such as alignment) are satisfied. */ |
| 1193 | static bfd_reloc_code_real_type |
| 1194 | obtain_reloc_for_imm16 (fixS *fix, long *val) |
| 1195 | { |
| 1196 | valueT fup = fix->fx_addnumber; |
| 1197 | bfd_reloc_code_real_type reloc; |
| 1198 | |
| 1199 | if (fix->fx_pcrel) |
| 1200 | abort (); |
| 1201 | |
| 1202 | /* Check alignment restrictions. */ |
| 1203 | if ((fup & OP_ALIGN2) && (*val & 0x1)) |
| 1204 | as_bad_where (fix->fx_file, fix->fx_line, |
| 1205 | _("This immediate requires 0 MOD 2 alignment")); |
| 1206 | else if ((fup & OP_ALIGN4) && (*val & 0x3)) |
| 1207 | as_bad_where (fix->fx_file, fix->fx_line, |
| 1208 | _("This immediate requires 0 MOD 4 alignment")); |
| 1209 | else if ((fup & OP_ALIGN8) && (*val & 0x7)) |
| 1210 | as_bad_where (fix->fx_file, fix->fx_line, |
| 1211 | _("This immediate requires 0 MOD 8 alignment")); |
| 1212 | else if ((fup & OP_ALIGN16) && (*val & 0xf)) |
| 1213 | as_bad_where (fix->fx_file, fix->fx_line, |
| 1214 | _("This immediate requires 0 MOD 16 alignment")); |
| 1215 | |
| 1216 | if (fup & OP_SEL_HA) |
| 1217 | { |
| 1218 | *val = (*val >> 16) + (*val & 0x8000 ? 1 : 0); |
| 1219 | reloc = BFD_RELOC_860_HIGHADJ; |
| 1220 | } |
| 1221 | else if (fup & OP_SEL_H) |
| 1222 | { |
| 1223 | *val >>= 16; |
| 1224 | reloc = BFD_RELOC_860_HIGH; |
| 1225 | } |
| 1226 | else if (fup & OP_SEL_L) |
| 1227 | { |
| 1228 | int num_encode; |
| 1229 | if (fup & OP_IMM_SPLIT16) |
| 1230 | { |
| 1231 | if (fup & OP_ENCODE1) |
| 1232 | { |
| 1233 | num_encode = 1; |
| 1234 | reloc = BFD_RELOC_860_SPLIT1; |
| 1235 | } |
| 1236 | else if (fup & OP_ENCODE2) |
| 1237 | { |
| 1238 | num_encode = 2; |
| 1239 | reloc = BFD_RELOC_860_SPLIT2; |
| 1240 | } |
| 1241 | else |
| 1242 | { |
| 1243 | num_encode = 0; |
| 1244 | reloc = BFD_RELOC_860_SPLIT0; |
| 1245 | } |
| 1246 | } |
| 1247 | else |
| 1248 | { |
| 1249 | if (fup & OP_ENCODE1) |
| 1250 | { |
| 1251 | num_encode = 1; |
| 1252 | reloc = BFD_RELOC_860_LOW1; |
| 1253 | } |
| 1254 | else if (fup & OP_ENCODE2) |
| 1255 | { |
| 1256 | num_encode = 2; |
| 1257 | reloc = BFD_RELOC_860_LOW2; |
| 1258 | } |
| 1259 | else if (fup & OP_ENCODE3) |
| 1260 | { |
| 1261 | num_encode = 3; |
| 1262 | reloc = BFD_RELOC_860_LOW3; |
| 1263 | } |
| 1264 | else |
| 1265 | { |
| 1266 | num_encode = 0; |
| 1267 | reloc = BFD_RELOC_860_LOW0; |
| 1268 | } |
| 1269 | } |
| 1270 | |
| 1271 | /* Preserve size encode bits. */ |
| 1272 | *val &= ~((1 << num_encode) - 1); |
| 1273 | } |
| 1274 | else |
| 1275 | { |
| 1276 | /* No selector. What reloc do we generate (???)? */ |
| 1277 | reloc = BFD_RELOC_32; |
| 1278 | } |
| 1279 | |
| 1280 | return reloc; |
| 1281 | } |
| 1282 | |
| 1283 | /* Attempt to simplify or eliminate a fixup. To indicate that a fixup |
| 1284 | has been eliminated, set fix->fx_done. If fix->fx_addsy is non-NULL, |
| 1285 | we will have to generate a reloc entry. */ |
| 1286 | |
| 1287 | void |
| 1288 | md_apply_fix (fixS *fix, valueT *valP, segT seg ATTRIBUTE_UNUSED) |
| 1289 | { |
| 1290 | char *buf; |
| 1291 | long val = *valP; |
| 1292 | unsigned long insn; |
| 1293 | valueT fup; |
| 1294 | |
| 1295 | buf = fix->fx_frag->fr_literal + fix->fx_where; |
| 1296 | |
| 1297 | /* Recall that earlier we stored the opcode little-endian. */ |
| 1298 | insn = bfd_getl32 (buf); |
| 1299 | |
| 1300 | /* We stored a fix-up in this oddly-named scratch field. */ |
| 1301 | fup = fix->fx_addnumber; |
| 1302 | |
| 1303 | /* Determine the necessary relocations as well as inserting an |
| 1304 | immediate into the instruction. */ |
| 1305 | if (fup & OP_IMM_U5) |
| 1306 | { |
| 1307 | if (val & ~0x1f) |
| 1308 | as_bad_where (fix->fx_file, fix->fx_line, |
| 1309 | _("5-bit immediate too large")); |
| 1310 | if (fix->fx_addsy) |
| 1311 | as_bad_where (fix->fx_file, fix->fx_line, |
| 1312 | _("5-bit field must be absolute")); |
| 1313 | |
| 1314 | insn |= (val & 0x1f) << 11; |
| 1315 | bfd_putl32 (insn, buf); |
| 1316 | fix->fx_r_type = BFD_RELOC_NONE; |
| 1317 | fix->fx_done = 1; |
| 1318 | } |
| 1319 | else if (fup & OP_IMM_S16) |
| 1320 | { |
| 1321 | fix->fx_r_type = obtain_reloc_for_imm16 (fix, &val); |
| 1322 | |
| 1323 | /* Insert the immediate. */ |
| 1324 | if (fix->fx_addsy) |
| 1325 | fix->fx_done = 0; |
| 1326 | else |
| 1327 | { |
| 1328 | insn |= val & 0xffff; |
| 1329 | bfd_putl32 (insn, buf); |
| 1330 | fix->fx_r_type = BFD_RELOC_NONE; |
| 1331 | fix->fx_done = 1; |
| 1332 | } |
| 1333 | } |
| 1334 | else if (fup & OP_IMM_U16) |
| 1335 | abort (); |
| 1336 | |
| 1337 | else if (fup & OP_IMM_SPLIT16) |
| 1338 | { |
| 1339 | fix->fx_r_type = obtain_reloc_for_imm16 (fix, &val); |
| 1340 | |
| 1341 | /* Insert the immediate. */ |
| 1342 | if (fix->fx_addsy) |
| 1343 | fix->fx_done = 0; |
| 1344 | else |
| 1345 | { |
| 1346 | insn |= val & 0x7ff; |
| 1347 | insn |= (val & 0xf800) << 5; |
| 1348 | bfd_putl32 (insn, buf); |
| 1349 | fix->fx_r_type = BFD_RELOC_NONE; |
| 1350 | fix->fx_done = 1; |
| 1351 | } |
| 1352 | } |
| 1353 | else if (fup & OP_IMM_BR16) |
| 1354 | { |
| 1355 | if (val & 0x3) |
| 1356 | as_bad_where (fix->fx_file, fix->fx_line, |
| 1357 | _("A branch offset requires 0 MOD 4 alignment")); |
| 1358 | |
| 1359 | val = val >> 2; |
| 1360 | |
| 1361 | /* Insert the immediate. */ |
| 1362 | if (fix->fx_addsy) |
| 1363 | { |
| 1364 | fix->fx_done = 0; |
| 1365 | fix->fx_r_type = BFD_RELOC_860_PC16; |
| 1366 | } |
| 1367 | else |
| 1368 | { |
| 1369 | insn |= (val & 0x7ff); |
| 1370 | insn |= ((val & 0xf800) << 5); |
| 1371 | bfd_putl32 (insn, buf); |
| 1372 | fix->fx_r_type = BFD_RELOC_NONE; |
| 1373 | fix->fx_done = 1; |
| 1374 | } |
| 1375 | } |
| 1376 | else if (fup & OP_IMM_BR26) |
| 1377 | { |
| 1378 | if (val & 0x3) |
| 1379 | as_bad_where (fix->fx_file, fix->fx_line, |
| 1380 | _("A branch offset requires 0 MOD 4 alignment")); |
| 1381 | |
| 1382 | val >>= 2; |
| 1383 | |
| 1384 | /* Insert the immediate. */ |
| 1385 | if (fix->fx_addsy) |
| 1386 | { |
| 1387 | fix->fx_r_type = BFD_RELOC_860_PC26; |
| 1388 | fix->fx_done = 0; |
| 1389 | } |
| 1390 | else |
| 1391 | { |
| 1392 | insn |= (val & 0x3ffffff); |
| 1393 | bfd_putl32 (insn, buf); |
| 1394 | fix->fx_r_type = BFD_RELOC_NONE; |
| 1395 | fix->fx_done = 1; |
| 1396 | } |
| 1397 | } |
| 1398 | else if (fup != OP_NONE) |
| 1399 | { |
| 1400 | as_bad_where (fix->fx_file, fix->fx_line, |
| 1401 | _("Unrecognized fix-up (0x%08lx)"), (unsigned long) fup); |
| 1402 | abort (); |
| 1403 | } |
| 1404 | else |
| 1405 | { |
| 1406 | /* I believe only fix-ups such as ".long .ep.main-main+0xc8000000" |
| 1407 | reach here (???). */ |
| 1408 | if (fix->fx_addsy) |
| 1409 | { |
| 1410 | fix->fx_r_type = BFD_RELOC_32; |
| 1411 | fix->fx_done = 0; |
| 1412 | } |
| 1413 | else |
| 1414 | { |
| 1415 | insn |= (val & 0xffffffff); |
| 1416 | bfd_putl32 (insn, buf); |
| 1417 | fix->fx_r_type = BFD_RELOC_NONE; |
| 1418 | fix->fx_done = 1; |
| 1419 | } |
| 1420 | } |
| 1421 | } |
| 1422 | |
| 1423 | /* Generate a machine dependent reloc from a fixup. */ |
| 1424 | arelent* |
| 1425 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, |
| 1426 | fixS *fixp) |
| 1427 | { |
| 1428 | arelent *reloc; |
| 1429 | |
| 1430 | reloc = xmalloc (sizeof (*reloc)); |
| 1431 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); |
| 1432 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
| 1433 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; |
| 1434 | reloc->addend = fixp->fx_offset; |
| 1435 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); |
| 1436 | |
| 1437 | if (! reloc->howto) |
| 1438 | { |
| 1439 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 1440 | "Cannot represent %s relocation in object file", |
| 1441 | bfd_get_reloc_code_name (fixp->fx_r_type)); |
| 1442 | } |
| 1443 | return reloc; |
| 1444 | } |
| 1445 | |
| 1446 | /* This is called from HANDLE_ALIGN in write.c. Fill in the contents |
| 1447 | of an rs_align_code fragment. */ |
| 1448 | |
| 1449 | void |
| 1450 | i860_handle_align (fragS *fragp) |
| 1451 | { |
| 1452 | /* Instructions are always stored little-endian on the i860. */ |
| 1453 | static const unsigned char le_nop[] = { 0x00, 0x00, 0x00, 0xA0 }; |
| 1454 | |
| 1455 | int bytes; |
| 1456 | char *p; |
| 1457 | |
| 1458 | if (fragp->fr_type != rs_align_code) |
| 1459 | return; |
| 1460 | |
| 1461 | bytes = fragp->fr_next->fr_address - fragp->fr_address - fragp->fr_fix; |
| 1462 | p = fragp->fr_literal + fragp->fr_fix; |
| 1463 | |
| 1464 | /* Make sure we are on a 4-byte boundary, in case someone has been |
| 1465 | putting data into a text section. */ |
| 1466 | if (bytes & 3) |
| 1467 | { |
| 1468 | int fix = bytes & 3; |
| 1469 | memset (p, 0, fix); |
| 1470 | p += fix; |
| 1471 | fragp->fr_fix += fix; |
| 1472 | } |
| 1473 | |
| 1474 | memcpy (p, le_nop, 4); |
| 1475 | fragp->fr_var = 4; |
| 1476 | } |
| 1477 | |
| 1478 | /* This is called after a user-defined label is seen. We check |
| 1479 | if the label has a double colon (valid in Intel syntax mode only), |
| 1480 | in which case it should be externalized. */ |
| 1481 | |
| 1482 | void |
| 1483 | i860_check_label (symbolS *labelsym) |
| 1484 | { |
| 1485 | /* At this point, the current line pointer is sitting on the character |
| 1486 | just after the first colon on the label. */ |
| 1487 | if (target_intel_syntax && *input_line_pointer == ':') |
| 1488 | { |
| 1489 | S_SET_EXTERNAL (labelsym); |
| 1490 | input_line_pointer++; |
| 1491 | } |
| 1492 | } |