1 /* CGEN generic assembler support code.
3 Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
5 This file is part of the GNU Binutils and GDB, the GNU debugger.
7 This program 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)
12 This program 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.
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 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 #include "libiberty.h"
28 #include "opcode/cgen.h"
31 /* Set the cgen_parse_operand_fn callback. */
34 cgen_set_parse_operand_fn (cd, fn)
36 cgen_parse_operand_fn fn;
38 cd->parse_operand_fn = fn;
41 /* Called whenever starting to parse an insn. */
44 cgen_init_parse_operand (cd)
47 /* This tells the callback to re-initialize. */
48 (void) (* cd->parse_operand_fn)
49 (cd, CGEN_PARSE_OPERAND_INIT, NULL, 0, 0, NULL, NULL);
52 /* Subroutine of build_asm_hash_table to add INSNS to the hash table.
54 COUNT is the number of elements in INSNS.
55 ENTSIZE is sizeof (CGEN_IBASE) for the target.
56 ??? No longer used but leave in for now.
57 HTABLE points to the hash table.
58 HENTBUF is a pointer to sufficiently large buffer of hash entries.
59 The result is a pointer to the next entry to use.
61 The table is scanned backwards as additions are made to the front of the
62 list and we want earlier ones to be prefered. */
64 static CGEN_INSN_LIST *
65 hash_insn_array (cd, insns, count, entsize, htable, hentbuf)
67 const CGEN_INSN *insns;
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 (cd, insns, htable, hentbuf)
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 (cd)
125 int count = cgen_insn_count (cd) + cgen_macro_insn_count (cd);
126 CGEN_INSN_TABLE *insn_table = &cd->insn_table;
127 CGEN_INSN_TABLE *macro_insn_table = &cd->macro_insn_table;
128 unsigned int hash_size = cd->asm_hash_size;
129 CGEN_INSN_LIST *hash_entry_buf;
130 CGEN_INSN_LIST **asm_hash_table;
131 CGEN_INSN_LIST *asm_hash_table_entries;
133 /* The space allocated for the hash table consists of two parts:
134 the hash table and the hash lists. */
136 asm_hash_table = (CGEN_INSN_LIST **)
137 xmalloc (hash_size * sizeof (CGEN_INSN_LIST *));
138 memset (asm_hash_table, 0, hash_size * sizeof (CGEN_INSN_LIST *));
139 asm_hash_table_entries = hash_entry_buf = (CGEN_INSN_LIST *)
140 xmalloc (count * sizeof (CGEN_INSN_LIST));
142 /* Add compiled in insns.
143 Don't include the first one as it is a reserved entry. */
144 /* ??? It was the end of all hash chains, and also the special
145 "invalid insn" marker. May be able to do it differently now. */
147 hash_entry_buf = hash_insn_array (cd,
148 insn_table->init_entries + 1,
149 insn_table->num_init_entries - 1,
150 insn_table->entry_size,
151 asm_hash_table, hash_entry_buf);
153 /* Add compiled in macro-insns. */
155 hash_entry_buf = hash_insn_array (cd, macro_insn_table->init_entries,
156 macro_insn_table->num_init_entries,
157 macro_insn_table->entry_size,
158 asm_hash_table, hash_entry_buf);
160 /* Add runtime added insns.
161 Later added insns will be prefered over earlier ones. */
163 hash_entry_buf = hash_insn_list (cd, insn_table->new_entries,
164 asm_hash_table, hash_entry_buf);
166 /* Add runtime added macro-insns. */
168 hash_insn_list (cd, macro_insn_table->new_entries,
169 asm_hash_table, hash_entry_buf);
171 cd->asm_hash_table = asm_hash_table;
172 cd->asm_hash_table_entries = asm_hash_table_entries;
175 /* Return the first entry in the hash list for INSN. */
178 cgen_asm_lookup_insn (cd, insn)
184 if (cd->asm_hash_table == NULL)
185 build_asm_hash_table (cd);
187 hash = (* cd->asm_hash) (insn);
188 return cd->asm_hash_table[hash];
192 The result is NULL upon success or an error message.
193 If successful, *STRP is updated to point passed the keyword.
195 ??? At present we have a static notion of how to pick out a keyword.
196 Later we can allow a target to customize this if necessary [say by
197 recording something in the keyword table]. */
200 cgen_parse_keyword (cd, strp, keyword_table, valuep)
203 CGEN_KEYWORD *keyword_table;
206 const CGEN_KEYWORD_ENTRY *ke;
208 const char *p,*start;
212 /* Allow any first character.
213 Note that this allows recognizing ",a" for the annul flag in sparc
214 even though "," is subsequently not a valid keyword char. */
218 /* Now allow letters, digits, and _. */
219 while (((p - start) < (int) sizeof (buf))
220 && (isalnum ((unsigned char) *p) || *p == '_'))
223 if (p - start >= (int) sizeof (buf))
224 return _("unrecognized keyword/register name");
226 memcpy (buf, start, p - start);
229 ke = cgen_keyword_lookup_name (keyword_table, buf);
234 /* Don't advance pointer if we recognized the null keyword. */
235 if (ke->name[0] != 0)
240 return "unrecognized keyword/register name";
243 /* Parse a small signed integer parser.
244 ??? VALUEP is not a bfd_vma * on purpose, though this is confusing.
245 Note that if the caller expects a bfd_vma result, it should call
246 cgen_parse_address. */
249 cgen_parse_signed_integer (cd, strp, opindex, valuep)
256 enum cgen_parse_operand_result result;
259 errmsg = (* cd->parse_operand_fn)
260 (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE,
262 /* FIXME: Examine `result'. */
268 /* Parse a small unsigned integer parser.
269 ??? VALUEP is not a bfd_vma * on purpose, though this is confusing.
270 Note that if the caller expects a bfd_vma result, it should call
271 cgen_parse_address. */
274 cgen_parse_unsigned_integer (cd, strp, opindex, valuep)
278 unsigned long *valuep;
281 enum cgen_parse_operand_result result;
284 errmsg = (* cd->parse_operand_fn)
285 (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE,
287 /* FIXME: Examine `result'. */
293 /* Address parser. */
296 cgen_parse_address (cd, strp, opindex, opinfo, resultp, valuep)
301 enum cgen_parse_operand_result *resultp;
305 enum cgen_parse_operand_result result_type;
308 errmsg = (* cd->parse_operand_fn)
309 (cd, CGEN_PARSE_OPERAND_ADDRESS, strp, opindex, opinfo,
310 &result_type, &value);
311 /* FIXME: Examine `result'. */
315 *resultp = result_type;
321 /* Signed integer validation routine. */
324 cgen_validate_signed_integer (value, min, max)
325 long value, min, max;
327 if (value < min || value > max)
329 static char buf[100];
331 /* xgettext:c-format */
332 sprintf (buf, _("operand out of range (%ld not between %ld and %ld)"),
340 /* Unsigned integer validation routine.
341 Supplying `min' here may seem unnecessary, but we also want to handle
342 cases where min != 0 (and max > LONG_MAX). */
345 cgen_validate_unsigned_integer (value, min, max)
346 unsigned long value, min, max;
348 if (value < min || value > max)
350 static char buf[100];
352 /* xgettext:c-format */
353 sprintf (buf, _("operand out of range (%lu not between %lu and %lu)"),