1 /* CGEN generic assembler support code.
2 Copyright (C) 1996-2019 Free Software Foundation, Inc.
4 This file is part of libopcodes.
6 This library is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
11 It is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
14 License for more details.
17 You should have received a copy of the GNU General Public License along
18 with this program; if not, write to the Free Software Foundation, Inc.,
19 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
24 #include "libiberty.h"
25 #include "safe-ctype.h"
28 #include "opcode/cgen.h"
31 static CGEN_INSN_LIST * hash_insn_array (CGEN_CPU_DESC, const CGEN_INSN *, int, int, CGEN_INSN_LIST **, CGEN_INSN_LIST *);
32 static CGEN_INSN_LIST * hash_insn_list (CGEN_CPU_DESC, const CGEN_INSN_LIST *, CGEN_INSN_LIST **, CGEN_INSN_LIST *);
33 static void build_asm_hash_table (CGEN_CPU_DESC);
35 /* Set the cgen_parse_operand_fn callback. */
38 cgen_set_parse_operand_fn (CGEN_CPU_DESC cd, cgen_parse_operand_fn fn)
40 cd->parse_operand_fn = fn;
43 /* Called whenever starting to parse an insn. */
46 cgen_init_parse_operand (CGEN_CPU_DESC cd)
48 /* This tells the callback to re-initialize. */
49 (void) (* cd->parse_operand_fn)
50 (cd, CGEN_PARSE_OPERAND_INIT, NULL, 0, 0, NULL, NULL);
53 /* Subroutine of build_asm_hash_table to add INSNS to the hash table.
55 COUNT is the number of elements in INSNS.
56 ENTSIZE is sizeof (CGEN_IBASE) for the target.
57 ??? No longer used but leave in for now.
58 HTABLE points to the hash table.
59 HENTBUF is a pointer to sufficiently large buffer of hash entries.
60 The result is a pointer to the next entry to use.
62 The table is scanned backwards as additions are made to the front of the
63 list and we want earlier ones to be prefered. */
65 static CGEN_INSN_LIST *
66 hash_insn_array (CGEN_CPU_DESC cd,
67 const CGEN_INSN *insns,
69 int entsize ATTRIBUTE_UNUSED,
70 CGEN_INSN_LIST **htable,
71 CGEN_INSN_LIST *hentbuf)
75 for (i = count - 1; i >= 0; --i, ++hentbuf)
78 const CGEN_INSN *insn = &insns[i];
80 if (! (* cd->asm_hash_p) (insn))
82 hash = (* cd->asm_hash) (CGEN_INSN_MNEMONIC (insn));
83 hentbuf->next = htable[hash];
85 htable[hash] = hentbuf;
91 /* Subroutine of build_asm_hash_table to add INSNS to the hash table.
92 This function is identical to hash_insn_array except the insns are
95 static CGEN_INSN_LIST *
96 hash_insn_list (CGEN_CPU_DESC cd,
97 const CGEN_INSN_LIST *insns,
98 CGEN_INSN_LIST **htable,
99 CGEN_INSN_LIST *hentbuf)
101 const CGEN_INSN_LIST *ilist;
103 for (ilist = insns; ilist != NULL; ilist = ilist->next, ++ hentbuf)
107 if (! (* cd->asm_hash_p) (ilist->insn))
109 hash = (* cd->asm_hash) (CGEN_INSN_MNEMONIC (ilist->insn));
110 hentbuf->next = htable[hash];
111 hentbuf->insn = ilist->insn;
112 htable[hash] = hentbuf;
118 /* Build the assembler instruction hash table. */
121 build_asm_hash_table (CGEN_CPU_DESC cd)
123 int count = cgen_insn_count (cd) + cgen_macro_insn_count (cd);
124 CGEN_INSN_TABLE *insn_table = &cd->insn_table;
125 CGEN_INSN_TABLE *macro_insn_table = &cd->macro_insn_table;
126 unsigned int hash_size = cd->asm_hash_size;
127 CGEN_INSN_LIST *hash_entry_buf;
128 CGEN_INSN_LIST **asm_hash_table;
129 CGEN_INSN_LIST *asm_hash_table_entries;
131 /* The space allocated for the hash table consists of two parts:
132 the hash table and the hash lists. */
134 asm_hash_table = (CGEN_INSN_LIST **)
135 xmalloc (hash_size * sizeof (CGEN_INSN_LIST *));
136 memset (asm_hash_table, 0, hash_size * sizeof (CGEN_INSN_LIST *));
137 asm_hash_table_entries = hash_entry_buf = (CGEN_INSN_LIST *)
138 xmalloc (count * sizeof (CGEN_INSN_LIST));
140 /* Add compiled in insns.
141 Don't include the first one as it is a reserved entry. */
142 /* ??? It was the end of all hash chains, and also the special
143 "invalid insn" marker. May be able to do it differently now. */
145 hash_entry_buf = hash_insn_array (cd,
146 insn_table->init_entries + 1,
147 insn_table->num_init_entries - 1,
148 insn_table->entry_size,
149 asm_hash_table, hash_entry_buf);
151 /* Add compiled in macro-insns. */
153 hash_entry_buf = hash_insn_array (cd, macro_insn_table->init_entries,
154 macro_insn_table->num_init_entries,
155 macro_insn_table->entry_size,
156 asm_hash_table, hash_entry_buf);
158 /* Add runtime added insns.
159 Later added insns will be prefered over earlier ones. */
161 hash_entry_buf = hash_insn_list (cd, insn_table->new_entries,
162 asm_hash_table, hash_entry_buf);
164 /* Add runtime added macro-insns. */
166 hash_insn_list (cd, macro_insn_table->new_entries,
167 asm_hash_table, hash_entry_buf);
169 cd->asm_hash_table = asm_hash_table;
170 cd->asm_hash_table_entries = asm_hash_table_entries;
173 /* Return the first entry in the hash list for INSN. */
176 cgen_asm_lookup_insn (CGEN_CPU_DESC cd, const char *insn)
180 if (cd->asm_hash_table == NULL)
181 build_asm_hash_table (cd);
183 hash = (* cd->asm_hash) (insn);
184 return cd->asm_hash_table[hash];
188 The result is NULL upon success or an error message.
189 If successful, *STRP is updated to point passed the keyword.
191 ??? At present we have a static notion of how to pick out a keyword.
192 Later we can allow a target to customize this if necessary [say by
193 recording something in the keyword table]. */
196 cgen_parse_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
198 CGEN_KEYWORD *keyword_table,
201 const CGEN_KEYWORD_ENTRY *ke;
203 const char *p,*start;
205 if (keyword_table->name_hash_table == NULL)
206 (void) cgen_keyword_search_init (keyword_table, NULL);
210 /* Allow any first character. This is to make life easier for
211 the fairly common case of suffixes, eg. 'ld.b.w', where the first
212 character of the suffix ('.') is special. */
216 /* Allow letters, digits, and any special characters. */
217 while (((p - start) < (int) sizeof (buf))
221 || strchr (keyword_table->nonalpha_chars, *p)))
224 if (p - start >= (int) sizeof (buf))
226 /* All non-empty CGEN keywords can fit into BUF. The only thing
227 we can match here is the empty keyword. */
232 memcpy (buf, start, p - start);
236 ke = cgen_keyword_lookup_name (keyword_table, buf);
241 /* Don't advance pointer if we recognized the null keyword. */
242 if (ke->name[0] != 0)
247 return "unrecognized keyword/register name";
250 /* Parse a small signed integer parser.
251 ??? VALUEP is not a bfd_vma * on purpose, though this is confusing.
252 Note that if the caller expects a bfd_vma result, it should call
253 cgen_parse_address. */
256 cgen_parse_signed_integer (CGEN_CPU_DESC cd,
262 enum cgen_parse_operand_result result;
265 errmsg = (* cd->parse_operand_fn)
266 (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE,
268 /* FIXME: Examine `result'. */
271 /* Handle the case where a hex value is parsed on a 64-bit host.
272 A value like 0xffffe000 is clearly intended to be a negative
273 16-bit value, but on a 64-bit host it will be parsed by gas
274 as 0x00000000ffffe000.
276 The shifts below are designed not to produce compile time
277 warnings on a 32-bit host. */
278 if (sizeof (value) > 4
279 && result == CGEN_PARSE_OPERAND_RESULT_NUMBER
281 && (value & 0x80000000)
282 && ((value >> 31) == 1))
283 value |= ((bfd_vma) -1) << 31;
290 /* Parse a small unsigned integer parser.
291 ??? VALUEP is not a bfd_vma * on purpose, though this is confusing.
292 Note that if the caller expects a bfd_vma result, it should call
293 cgen_parse_address. */
296 cgen_parse_unsigned_integer (CGEN_CPU_DESC cd,
299 unsigned long *valuep)
302 enum cgen_parse_operand_result result;
305 errmsg = (* cd->parse_operand_fn)
306 (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE,
308 /* FIXME: Examine `result'. */
314 /* Address parser. */
317 cgen_parse_address (CGEN_CPU_DESC cd,
321 enum cgen_parse_operand_result *resultp,
325 enum cgen_parse_operand_result result_type;
328 errmsg = (* cd->parse_operand_fn)
329 (cd, CGEN_PARSE_OPERAND_ADDRESS, strp, opindex, opinfo,
330 &result_type, &value);
331 /* FIXME: Examine `result'. */
335 *resultp = result_type;
341 /* Signed integer validation routine. */
344 cgen_validate_signed_integer (long value, long min, long max)
346 if (value < min || value > max)
348 static char buf[100];
350 /* xgettext:c-format */
351 sprintf (buf, _("operand out of range (%ld not between %ld and %ld)"),
359 /* Unsigned integer validation routine.
360 Supplying `min' here may seem unnecessary, but we also want to handle
361 cases where min != 0 (and max > LONG_MAX). */
364 cgen_validate_unsigned_integer (unsigned long value,
368 if (value < min || value > max)
370 static char buf[100];
372 /* xgettext:c-format */
373 sprintf (buf, _("operand out of range (%lu not between %lu and %lu)"),