| 1 | /* CGEN generic assembler support code. |
| 2 | Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2007 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of libopcodes. |
| 6 | |
| 7 | This library is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | It is distributed in the hope that it will be useful, but WITHOUT |
| 13 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
| 15 | License for more details. |
| 16 | |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License along |
| 19 | with this program; if not, write to the Free Software Foundation, Inc., |
| 20 | 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include "sysdep.h" |
| 23 | #include <stdio.h> |
| 24 | #include "ansidecl.h" |
| 25 | #include "libiberty.h" |
| 26 | #include "safe-ctype.h" |
| 27 | #include "bfd.h" |
| 28 | #include "symcat.h" |
| 29 | #include "opcode/cgen.h" |
| 30 | #include "opintl.h" |
| 31 | |
| 32 | static CGEN_INSN_LIST * hash_insn_array (CGEN_CPU_DESC, const CGEN_INSN *, int, int, CGEN_INSN_LIST **, CGEN_INSN_LIST *); |
| 33 | static CGEN_INSN_LIST * hash_insn_list (CGEN_CPU_DESC, const CGEN_INSN_LIST *, CGEN_INSN_LIST **, CGEN_INSN_LIST *); |
| 34 | static void build_asm_hash_table (CGEN_CPU_DESC); |
| 35 | |
| 36 | /* Set the cgen_parse_operand_fn callback. */ |
| 37 | |
| 38 | void |
| 39 | cgen_set_parse_operand_fn (CGEN_CPU_DESC cd, cgen_parse_operand_fn fn) |
| 40 | { |
| 41 | cd->parse_operand_fn = fn; |
| 42 | } |
| 43 | |
| 44 | /* Called whenever starting to parse an insn. */ |
| 45 | |
| 46 | void |
| 47 | cgen_init_parse_operand (CGEN_CPU_DESC cd) |
| 48 | { |
| 49 | /* This tells the callback to re-initialize. */ |
| 50 | (void) (* cd->parse_operand_fn) |
| 51 | (cd, CGEN_PARSE_OPERAND_INIT, NULL, 0, 0, NULL, NULL); |
| 52 | } |
| 53 | |
| 54 | /* Subroutine of build_asm_hash_table to add INSNS to the hash table. |
| 55 | |
| 56 | COUNT is the number of elements in INSNS. |
| 57 | ENTSIZE is sizeof (CGEN_IBASE) for the target. |
| 58 | ??? No longer used but leave in for now. |
| 59 | HTABLE points to the hash table. |
| 60 | HENTBUF is a pointer to sufficiently large buffer of hash entries. |
| 61 | The result is a pointer to the next entry to use. |
| 62 | |
| 63 | The table is scanned backwards as additions are made to the front of the |
| 64 | list and we want earlier ones to be prefered. */ |
| 65 | |
| 66 | static CGEN_INSN_LIST * |
| 67 | hash_insn_array (CGEN_CPU_DESC cd, |
| 68 | const CGEN_INSN *insns, |
| 69 | int count, |
| 70 | int entsize ATTRIBUTE_UNUSED, |
| 71 | CGEN_INSN_LIST **htable, |
| 72 | CGEN_INSN_LIST *hentbuf) |
| 73 | { |
| 74 | int i; |
| 75 | |
| 76 | for (i = count - 1; i >= 0; --i, ++hentbuf) |
| 77 | { |
| 78 | unsigned int hash; |
| 79 | const CGEN_INSN *insn = &insns[i]; |
| 80 | |
| 81 | if (! (* cd->asm_hash_p) (insn)) |
| 82 | continue; |
| 83 | hash = (* cd->asm_hash) (CGEN_INSN_MNEMONIC (insn)); |
| 84 | hentbuf->next = htable[hash]; |
| 85 | hentbuf->insn = insn; |
| 86 | htable[hash] = hentbuf; |
| 87 | } |
| 88 | |
| 89 | return hentbuf; |
| 90 | } |
| 91 | |
| 92 | /* Subroutine of build_asm_hash_table to add INSNS to the hash table. |
| 93 | This function is identical to hash_insn_array except the insns are |
| 94 | in a list. */ |
| 95 | |
| 96 | static CGEN_INSN_LIST * |
| 97 | hash_insn_list (CGEN_CPU_DESC cd, |
| 98 | const CGEN_INSN_LIST *insns, |
| 99 | CGEN_INSN_LIST **htable, |
| 100 | CGEN_INSN_LIST *hentbuf) |
| 101 | { |
| 102 | const CGEN_INSN_LIST *ilist; |
| 103 | |
| 104 | for (ilist = insns; ilist != NULL; ilist = ilist->next, ++ hentbuf) |
| 105 | { |
| 106 | unsigned int hash; |
| 107 | |
| 108 | if (! (* cd->asm_hash_p) (ilist->insn)) |
| 109 | continue; |
| 110 | hash = (* cd->asm_hash) (CGEN_INSN_MNEMONIC (ilist->insn)); |
| 111 | hentbuf->next = htable[hash]; |
| 112 | hentbuf->insn = ilist->insn; |
| 113 | htable[hash] = hentbuf; |
| 114 | } |
| 115 | |
| 116 | return hentbuf; |
| 117 | } |
| 118 | |
| 119 | /* Build the assembler instruction hash table. */ |
| 120 | |
| 121 | static void |
| 122 | build_asm_hash_table (CGEN_CPU_DESC cd) |
| 123 | { |
| 124 | int count = cgen_insn_count (cd) + cgen_macro_insn_count (cd); |
| 125 | CGEN_INSN_TABLE *insn_table = &cd->insn_table; |
| 126 | CGEN_INSN_TABLE *macro_insn_table = &cd->macro_insn_table; |
| 127 | unsigned int hash_size = cd->asm_hash_size; |
| 128 | CGEN_INSN_LIST *hash_entry_buf; |
| 129 | CGEN_INSN_LIST **asm_hash_table; |
| 130 | CGEN_INSN_LIST *asm_hash_table_entries; |
| 131 | |
| 132 | /* The space allocated for the hash table consists of two parts: |
| 133 | the hash table and the hash lists. */ |
| 134 | |
| 135 | asm_hash_table = (CGEN_INSN_LIST **) |
| 136 | xmalloc (hash_size * sizeof (CGEN_INSN_LIST *)); |
| 137 | memset (asm_hash_table, 0, hash_size * sizeof (CGEN_INSN_LIST *)); |
| 138 | asm_hash_table_entries = hash_entry_buf = (CGEN_INSN_LIST *) |
| 139 | xmalloc (count * sizeof (CGEN_INSN_LIST)); |
| 140 | |
| 141 | /* Add compiled in insns. |
| 142 | Don't include the first one as it is a reserved entry. */ |
| 143 | /* ??? It was the end of all hash chains, and also the special |
| 144 | "invalid insn" marker. May be able to do it differently now. */ |
| 145 | |
| 146 | hash_entry_buf = hash_insn_array (cd, |
| 147 | insn_table->init_entries + 1, |
| 148 | insn_table->num_init_entries - 1, |
| 149 | insn_table->entry_size, |
| 150 | asm_hash_table, hash_entry_buf); |
| 151 | |
| 152 | /* Add compiled in macro-insns. */ |
| 153 | |
| 154 | hash_entry_buf = hash_insn_array (cd, macro_insn_table->init_entries, |
| 155 | macro_insn_table->num_init_entries, |
| 156 | macro_insn_table->entry_size, |
| 157 | asm_hash_table, hash_entry_buf); |
| 158 | |
| 159 | /* Add runtime added insns. |
| 160 | Later added insns will be prefered over earlier ones. */ |
| 161 | |
| 162 | hash_entry_buf = hash_insn_list (cd, insn_table->new_entries, |
| 163 | asm_hash_table, hash_entry_buf); |
| 164 | |
| 165 | /* Add runtime added macro-insns. */ |
| 166 | |
| 167 | hash_insn_list (cd, macro_insn_table->new_entries, |
| 168 | asm_hash_table, hash_entry_buf); |
| 169 | |
| 170 | cd->asm_hash_table = asm_hash_table; |
| 171 | cd->asm_hash_table_entries = asm_hash_table_entries; |
| 172 | } |
| 173 | |
| 174 | /* Return the first entry in the hash list for INSN. */ |
| 175 | |
| 176 | CGEN_INSN_LIST * |
| 177 | cgen_asm_lookup_insn (CGEN_CPU_DESC cd, const char *insn) |
| 178 | { |
| 179 | unsigned int hash; |
| 180 | |
| 181 | if (cd->asm_hash_table == NULL) |
| 182 | build_asm_hash_table (cd); |
| 183 | |
| 184 | hash = (* cd->asm_hash) (insn); |
| 185 | return cd->asm_hash_table[hash]; |
| 186 | } |
| 187 | \f |
| 188 | /* Keyword parser. |
| 189 | The result is NULL upon success or an error message. |
| 190 | If successful, *STRP is updated to point passed the keyword. |
| 191 | |
| 192 | ??? At present we have a static notion of how to pick out a keyword. |
| 193 | Later we can allow a target to customize this if necessary [say by |
| 194 | recording something in the keyword table]. */ |
| 195 | |
| 196 | const char * |
| 197 | cgen_parse_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED, |
| 198 | const char **strp, |
| 199 | CGEN_KEYWORD *keyword_table, |
| 200 | long *valuep) |
| 201 | { |
| 202 | const CGEN_KEYWORD_ENTRY *ke; |
| 203 | char buf[256]; |
| 204 | const char *p,*start; |
| 205 | |
| 206 | if (keyword_table->name_hash_table == NULL) |
| 207 | (void) cgen_keyword_search_init (keyword_table, NULL); |
| 208 | |
| 209 | p = start = *strp; |
| 210 | |
| 211 | /* Allow any first character. This is to make life easier for |
| 212 | the fairly common case of suffixes, eg. 'ld.b.w', where the first |
| 213 | character of the suffix ('.') is special. */ |
| 214 | if (*p) |
| 215 | ++p; |
| 216 | |
| 217 | /* Allow letters, digits, and any special characters. */ |
| 218 | while (((p - start) < (int) sizeof (buf)) |
| 219 | && *p |
| 220 | && (ISALNUM (*p) |
| 221 | || *p == '_' |
| 222 | || strchr (keyword_table->nonalpha_chars, *p))) |
| 223 | ++p; |
| 224 | |
| 225 | if (p - start >= (int) sizeof (buf)) |
| 226 | { |
| 227 | /* All non-empty CGEN keywords can fit into BUF. The only thing |
| 228 | we can match here is the empty keyword. */ |
| 229 | buf[0] = 0; |
| 230 | } |
| 231 | else |
| 232 | { |
| 233 | memcpy (buf, start, p - start); |
| 234 | buf[p - start] = 0; |
| 235 | } |
| 236 | |
| 237 | ke = cgen_keyword_lookup_name (keyword_table, buf); |
| 238 | |
| 239 | if (ke != NULL) |
| 240 | { |
| 241 | *valuep = ke->value; |
| 242 | /* Don't advance pointer if we recognized the null keyword. */ |
| 243 | if (ke->name[0] != 0) |
| 244 | *strp = p; |
| 245 | return NULL; |
| 246 | } |
| 247 | |
| 248 | return "unrecognized keyword/register name"; |
| 249 | } |
| 250 | |
| 251 | /* Parse a small signed integer parser. |
| 252 | ??? VALUEP is not a bfd_vma * on purpose, though this is confusing. |
| 253 | Note that if the caller expects a bfd_vma result, it should call |
| 254 | cgen_parse_address. */ |
| 255 | |
| 256 | const char * |
| 257 | cgen_parse_signed_integer (CGEN_CPU_DESC cd, |
| 258 | const char **strp, |
| 259 | int opindex, |
| 260 | long *valuep) |
| 261 | { |
| 262 | bfd_vma value; |
| 263 | enum cgen_parse_operand_result result; |
| 264 | const char *errmsg; |
| 265 | |
| 266 | errmsg = (* cd->parse_operand_fn) |
| 267 | (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE, |
| 268 | &result, &value); |
| 269 | /* FIXME: Examine `result'. */ |
| 270 | if (!errmsg) |
| 271 | *valuep = value; |
| 272 | return errmsg; |
| 273 | } |
| 274 | |
| 275 | /* Parse a small unsigned integer parser. |
| 276 | ??? VALUEP is not a bfd_vma * on purpose, though this is confusing. |
| 277 | Note that if the caller expects a bfd_vma result, it should call |
| 278 | cgen_parse_address. */ |
| 279 | |
| 280 | const char * |
| 281 | cgen_parse_unsigned_integer (CGEN_CPU_DESC cd, |
| 282 | const char **strp, |
| 283 | int opindex, |
| 284 | unsigned long *valuep) |
| 285 | { |
| 286 | bfd_vma value; |
| 287 | enum cgen_parse_operand_result result; |
| 288 | const char *errmsg; |
| 289 | |
| 290 | errmsg = (* cd->parse_operand_fn) |
| 291 | (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE, |
| 292 | &result, &value); |
| 293 | /* FIXME: Examine `result'. */ |
| 294 | if (!errmsg) |
| 295 | *valuep = value; |
| 296 | return errmsg; |
| 297 | } |
| 298 | |
| 299 | /* Address parser. */ |
| 300 | |
| 301 | const char * |
| 302 | cgen_parse_address (CGEN_CPU_DESC cd, |
| 303 | const char **strp, |
| 304 | int opindex, |
| 305 | int opinfo, |
| 306 | enum cgen_parse_operand_result *resultp, |
| 307 | bfd_vma *valuep) |
| 308 | { |
| 309 | bfd_vma value; |
| 310 | enum cgen_parse_operand_result result_type; |
| 311 | const char *errmsg; |
| 312 | |
| 313 | errmsg = (* cd->parse_operand_fn) |
| 314 | (cd, CGEN_PARSE_OPERAND_ADDRESS, strp, opindex, opinfo, |
| 315 | &result_type, &value); |
| 316 | /* FIXME: Examine `result'. */ |
| 317 | if (!errmsg) |
| 318 | { |
| 319 | if (resultp != NULL) |
| 320 | *resultp = result_type; |
| 321 | *valuep = value; |
| 322 | } |
| 323 | return errmsg; |
| 324 | } |
| 325 | \f |
| 326 | /* Signed integer validation routine. */ |
| 327 | |
| 328 | const char * |
| 329 | cgen_validate_signed_integer (long value, long min, long max) |
| 330 | { |
| 331 | if (value < min || value > max) |
| 332 | { |
| 333 | static char buf[100]; |
| 334 | |
| 335 | /* xgettext:c-format */ |
| 336 | sprintf (buf, _("operand out of range (%ld not between %ld and %ld)"), |
| 337 | value, min, max); |
| 338 | return buf; |
| 339 | } |
| 340 | |
| 341 | return NULL; |
| 342 | } |
| 343 | |
| 344 | /* Unsigned integer validation routine. |
| 345 | Supplying `min' here may seem unnecessary, but we also want to handle |
| 346 | cases where min != 0 (and max > LONG_MAX). */ |
| 347 | |
| 348 | const char * |
| 349 | cgen_validate_unsigned_integer (unsigned long value, |
| 350 | unsigned long min, |
| 351 | unsigned long max) |
| 352 | { |
| 353 | if (value < min || value > max) |
| 354 | { |
| 355 | static char buf[100]; |
| 356 | |
| 357 | /* xgettext:c-format */ |
| 358 | sprintf (buf, _("operand out of range (%lu not between %lu and %lu)"), |
| 359 | value, min, max); |
| 360 | return buf; |
| 361 | } |
| 362 | |
| 363 | return NULL; |
| 364 | } |