1 /* CGEN generic assembler support code.
2 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2007,
3 2011 Free Software Foundation, Inc.
5 This file is part of libopcodes.
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)
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.
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. */
25 #include "libiberty.h"
26 #include "safe-ctype.h"
29 #include "opcode/cgen.h"
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);
36 /* Set the cgen_parse_operand_fn callback. */
39 cgen_set_parse_operand_fn (CGEN_CPU_DESC cd, cgen_parse_operand_fn fn)
41 cd->parse_operand_fn = fn;
44 /* Called whenever starting to parse an insn. */
47 cgen_init_parse_operand (CGEN_CPU_DESC cd)
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);
54 /* Subroutine of build_asm_hash_table to add INSNS to the hash table.
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.
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. */
66 static CGEN_INSN_LIST *
67 hash_insn_array (CGEN_CPU_DESC cd,
68 const CGEN_INSN *insns,
70 int entsize ATTRIBUTE_UNUSED,
71 CGEN_INSN_LIST **htable,
72 CGEN_INSN_LIST *hentbuf)
76 for (i = count - 1; i >= 0; --i, ++hentbuf)
79 const CGEN_INSN *insn = &insns[i];
81 if (! (* cd->asm_hash_p) (insn))
83 hash = (* cd->asm_hash) (CGEN_INSN_MNEMONIC (insn));
84 hentbuf->next = htable[hash];
86 htable[hash] = hentbuf;
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
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)
102 const CGEN_INSN_LIST *ilist;
104 for (ilist = insns; ilist != NULL; ilist = ilist->next, ++ hentbuf)
108 if (! (* cd->asm_hash_p) (ilist->insn))
110 hash = (* cd->asm_hash) (CGEN_INSN_MNEMONIC (ilist->insn));
111 hentbuf->next = htable[hash];
112 hentbuf->insn = ilist->insn;
113 htable[hash] = hentbuf;
119 /* Build the assembler instruction hash table. */
122 build_asm_hash_table (CGEN_CPU_DESC cd)
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;
132 /* The space allocated for the hash table consists of two parts:
133 the hash table and the hash lists. */
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));
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. */
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);
152 /* Add compiled in macro-insns. */
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);
159 /* Add runtime added insns.
160 Later added insns will be prefered over earlier ones. */
162 hash_entry_buf = hash_insn_list (cd, insn_table->new_entries,
163 asm_hash_table, hash_entry_buf);
165 /* Add runtime added macro-insns. */
167 hash_insn_list (cd, macro_insn_table->new_entries,
168 asm_hash_table, hash_entry_buf);
170 cd->asm_hash_table = asm_hash_table;
171 cd->asm_hash_table_entries = asm_hash_table_entries;
174 /* Return the first entry in the hash list for INSN. */
177 cgen_asm_lookup_insn (CGEN_CPU_DESC cd, const char *insn)
181 if (cd->asm_hash_table == NULL)
182 build_asm_hash_table (cd);
184 hash = (* cd->asm_hash) (insn);
185 return cd->asm_hash_table[hash];
189 The result is NULL upon success or an error message.
190 If successful, *STRP is updated to point passed the keyword.
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]. */
197 cgen_parse_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
199 CGEN_KEYWORD *keyword_table,
202 const CGEN_KEYWORD_ENTRY *ke;
204 const char *p,*start;
206 if (keyword_table->name_hash_table == NULL)
207 (void) cgen_keyword_search_init (keyword_table, NULL);
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. */
217 /* Allow letters, digits, and any special characters. */
218 while (((p - start) < (int) sizeof (buf))
222 || strchr (keyword_table->nonalpha_chars, *p)))
225 if (p - start >= (int) sizeof (buf))
227 /* All non-empty CGEN keywords can fit into BUF. The only thing
228 we can match here is the empty keyword. */
233 memcpy (buf, start, p - start);
237 ke = cgen_keyword_lookup_name (keyword_table, buf);
242 /* Don't advance pointer if we recognized the null keyword. */
243 if (ke->name[0] != 0)
248 return "unrecognized keyword/register name";
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. */
257 cgen_parse_signed_integer (CGEN_CPU_DESC cd,
263 enum cgen_parse_operand_result result;
266 errmsg = (* cd->parse_operand_fn)
267 (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE,
269 /* FIXME: Examine `result'. */
272 /* Handle the case where a hex value is parsed on a 64-bit host.
273 A value like 0xffffe000 is clearly intended to be a negative
274 16-bit value, but on a 64-bit host it will be parsed by gas
275 as 0x00000000ffffe000.
277 The shifts below are designed not to produce compile time
278 warnings on a 32-bit host. */
279 if (sizeof (value) > 4
280 && result == CGEN_PARSE_OPERAND_RESULT_NUMBER
282 && (value & 0x80000000)
283 && ((value >> 31) == 1))
291 /* Parse a small unsigned integer parser.
292 ??? VALUEP is not a bfd_vma * on purpose, though this is confusing.
293 Note that if the caller expects a bfd_vma result, it should call
294 cgen_parse_address. */
297 cgen_parse_unsigned_integer (CGEN_CPU_DESC cd,
300 unsigned long *valuep)
303 enum cgen_parse_operand_result result;
306 errmsg = (* cd->parse_operand_fn)
307 (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE,
309 /* FIXME: Examine `result'. */
315 /* Address parser. */
318 cgen_parse_address (CGEN_CPU_DESC cd,
322 enum cgen_parse_operand_result *resultp,
326 enum cgen_parse_operand_result result_type;
329 errmsg = (* cd->parse_operand_fn)
330 (cd, CGEN_PARSE_OPERAND_ADDRESS, strp, opindex, opinfo,
331 &result_type, &value);
332 /* FIXME: Examine `result'. */
336 *resultp = result_type;
342 /* Signed integer validation routine. */
345 cgen_validate_signed_integer (long value, long min, long max)
347 if (value < min || value > max)
349 static char buf[100];
351 /* xgettext:c-format */
352 sprintf (buf, _("operand out of range (%ld not between %ld and %ld)"),
360 /* Unsigned integer validation routine.
361 Supplying `min' here may seem unnecessary, but we also want to handle
362 cases where min != 0 (and max > LONG_MAX). */
365 cgen_validate_unsigned_integer (unsigned long value,
369 if (value < min || value > max)
371 static char buf[100];
373 /* xgettext:c-format */
374 sprintf (buf, _("operand out of range (%lu not between %lu and %lu)"),