1 /* Assembler interface for targets using CGEN. -*- C -*-
2 CGEN: Cpu tools GENerator
4 THIS FILE IS MACHINE GENERATED WITH CGEN.
5 - the resultant file is machine generated, cgen-asm.in isn't
7 Copyright (C) 1996, 1997, 1998, 1999, 2001 Free Software Foundation, Inc.
9 This file is part of the GNU Binutils and GDB, the GNU debugger.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2, or (at your option)
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software Foundation, Inc.,
23 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
34 #include "@prefix@-desc.h"
35 #include "@prefix@-opc.h"
39 #define min(a,b) ((a) < (b) ? (a) : (b))
41 #define max(a,b) ((a) > (b) ? (a) : (b))
43 static const char * parse_insn_normal
44 PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *));
46 /* -- assembler routines inserted here */
48 /* Default insn parser.
50 The syntax string is scanned and operands are parsed and stored in FIELDS.
51 Relocs are queued as we go via other callbacks.
53 ??? Note that this is currently an all-or-nothing parser. If we fail to
54 parse the instruction, we return 0 and the caller will start over from
55 the beginning. Backtracking will be necessary in parsing subexpressions,
56 but that can be handled there. Not handling backtracking here may get
57 expensive in the case of the m68k. Deal with later.
59 Returns NULL for success, an error message for failure.
63 parse_insn_normal (cd, insn, strp, fields)
65 const CGEN_INSN *insn;
69 /* ??? Runtime added insns not handled yet. */
70 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
71 const char *str = *strp;
74 const CGEN_SYNTAX_CHAR_TYPE * syn;
75 #ifdef CGEN_MNEMONIC_OPERANDS
80 /* For now we assume the mnemonic is first (there are no leading operands).
81 We can parse it without needing to set up operand parsing.
82 GAS's input scrubber will ensure mnemonics are lowercase, but we may
83 not be called from GAS. */
84 p = CGEN_INSN_MNEMONIC (insn);
85 while (*p && tolower (*p) == tolower (*str))
89 return _("unrecognized instruction");
91 #ifndef CGEN_MNEMONIC_OPERANDS
92 if (* str && !isspace (* str))
93 return _("unrecognized instruction");
97 cgen_init_parse_operand (cd);
98 #ifdef CGEN_MNEMONIC_OPERANDS
102 /* We don't check for (*str != '\0') here because we want to parse
103 any trailing fake arguments in the syntax string. */
104 syn = CGEN_SYNTAX_STRING (syntax);
106 /* Mnemonics come first for now, ensure valid string. */
107 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
114 /* Non operand chars must match exactly. */
115 if (CGEN_SYNTAX_CHAR_P (* syn))
117 /* FIXME: While we allow for non-GAS callers above, we assume the
118 first char after the mnemonic part is a space. */
119 /* FIXME: We also take inappropriate advantage of the fact that
120 GAS's input scrubber will remove extraneous blanks. */
121 if (tolower (*str) == tolower (CGEN_SYNTAX_CHAR (* syn)))
123 #ifdef CGEN_MNEMONIC_OPERANDS
124 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
132 /* Syntax char didn't match. Can't be this insn. */
133 static char msg [80];
134 /* xgettext:c-format */
135 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
136 CGEN_SYNTAX_CHAR(*syn), *str);
141 /* Ran out of input. */
142 static char msg [80];
143 /* xgettext:c-format */
144 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
145 CGEN_SYNTAX_CHAR(*syn));
151 /* We have an operand of some sort. */
152 errmsg = @arch@_cgen_parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
157 /* Done with this operand, continue with next one. */
161 /* If we're at the end of the syntax string, we're done. */
164 /* FIXME: For the moment we assume a valid `str' can only contain
165 blanks now. IE: We needn't try again with a longer version of
166 the insn and it is assumed that longer versions of insns appear
167 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
168 while (isspace (* str))
172 return _("junk at end of line"); /* FIXME: would like to include `str' */
177 /* We couldn't parse it. */
178 return _("unrecognized instruction");
182 This routine is called for each instruction to be assembled.
183 STR points to the insn to be assembled.
184 We assume all necessary tables have been initialized.
185 The assembled instruction, less any fixups, is stored in BUF.
186 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
187 still needs to be converted to target byte order, otherwise BUF is an array
188 of bytes in target byte order.
189 The result is a pointer to the insn's entry in the opcode table,
190 or NULL if an error occured (an error message will have already been
193 Note that when processing (non-alias) macro-insns,
194 this function recurses.
196 ??? It's possible to make this cpu-independent.
197 One would have to deal with a few minor things.
198 At this point in time doing so would be more of a curiosity than useful
199 [for example this file isn't _that_ big], but keeping the possibility in
200 mind helps keep the design clean. */
203 @arch@_cgen_assemble_insn (cd, str, fields, buf, errmsg)
207 CGEN_INSN_BYTES_PTR buf;
211 CGEN_INSN_LIST *ilist;
212 const char *parse_errmsg = NULL;
213 const char *insert_errmsg = NULL;
215 /* Skip leading white space. */
216 while (isspace (* str))
219 /* The instructions are stored in hashed lists.
220 Get the first in the list. */
221 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
223 /* Keep looking until we find a match. */
226 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
228 const CGEN_INSN *insn = ilist->insn;
230 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
231 /* not usually needed as unsupported opcodes shouldn't be in the hash lists */
232 /* Is this insn supported by the selected cpu? */
233 if (! @arch@_cgen_insn_supported (cd, insn))
237 /* If the RELAX attribute is set, this is an insn that shouldn't be
238 chosen immediately. Instead, it is used during assembler/linker
239 relaxation if possible. */
240 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX) != 0)
245 /* Allow parse/insert handlers to obtain length of insn. */
246 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
248 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
249 if (parse_errmsg != NULL)
252 /* ??? 0 is passed for `pc' */
253 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
255 if (insert_errmsg != NULL)
258 /* It is up to the caller to actually output the insn and any
264 static char errbuf[150];
265 const char *tmp_errmsg;
267 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
268 /* If requesting verbose error messages, use insert_errmsg.
269 Failing that, use parse_errmsg */
270 tmp_errmsg = (insert_errmsg ? insert_errmsg :
271 parse_errmsg ? parse_errmsg :
272 _("unrecognized instruction"));
274 if (strlen (start) > 50)
275 /* xgettext:c-format */
276 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
278 /* xgettext:c-format */
279 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
281 if (strlen (start) > 50)
282 /* xgettext:c-format */
283 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
285 /* xgettext:c-format */
286 sprintf (errbuf, _("bad instruction `%.50s'"), start);
294 #if 0 /* This calls back to GAS which we can't do without care. */
296 /* Record each member of OPVALS in the assembler's symbol table.
297 This lets GAS parse registers for us.
298 ??? Interesting idea but not currently used. */
300 /* Record each member of OPVALS in the assembler's symbol table.
301 FIXME: Not currently used. */
304 @arch@_cgen_asm_hash_keywords (cd, opvals)
306 CGEN_KEYWORD *opvals;
308 CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL);
309 const CGEN_KEYWORD_ENTRY * ke;
311 while ((ke = cgen_keyword_search_next (& search)) != NULL)
313 #if 0 /* Unnecessary, should be done in the search routine. */
314 if (! @arch@_cgen_opval_supported (ke))
317 cgen_asm_record_register (cd, ke->name, ke->value);