[deliverable/binutils-gdb.git] / opcodes / cgen-asm.in

/* Assembler interface for targets using CGEN. -*- C -*-
   CGEN: Cpu tools GENerator

THIS FILE IS MACHINE GENERATED WITH CGEN.
- the resultant file is machine generated, cgen-asm.in isn't

Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.

This file is part of the GNU Binutils and GDB, the GNU debugger.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* ??? Eventually more and more of this stuff can go to cpu-independent files.
   Keep that in mind.  */

#include "sysdep.h"
#include <ctype.h>
#include <stdio.h>
#include "ansidecl.h"
#include "bfd.h"
#include "symcat.h"
#include "@prefix@-desc.h"
#include "@prefix@-opc.h"
#include "opintl.h"

#undef min
#define min(a,b) ((a) < (b) ? (a) : (b))
#undef max
#define max(a,b) ((a) > (b) ? (a) : (b))

static const char * parse_insn_normal
     PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *));
\f
/* -- assembler routines inserted here */
\f
/* Default insn parser.

   The syntax string is scanned and operands are parsed and stored in FIELDS.
   Relocs are queued as we go via other callbacks.

   ??? Note that this is currently an all-or-nothing parser.  If we fail to
   parse the instruction, we return 0 and the caller will start over from
   the beginning.  Backtracking will be necessary in parsing subexpressions,
   but that can be handled there.  Not handling backtracking here may get
   expensive in the case of the m68k.  Deal with later.

   Returns NULL for success, an error message for failure.
*/

static const char *
parse_insn_normal (cd, insn, strp, fields)
     CGEN_CPU_DESC cd;
     const CGEN_INSN *insn;
     const char **strp;
     CGEN_FIELDS *fields;
{
  /* ??? Runtime added insns not handled yet.  */
  const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
  const char *str = *strp;
  const char *errmsg;
  const char *p;
  const unsigned char * syn;
#ifdef CGEN_MNEMONIC_OPERANDS
  /* FIXME: wip */
  int past_opcode_p;
#endif

  /* For now we assume the mnemonic is first (there are no leading operands).
     We can parse it without needing to set up operand parsing.
     GAS's input scrubber will ensure mnemonics are lowercase, but we may
     not be called from GAS.  */
  p = CGEN_INSN_MNEMONIC (insn);
  while (*p && tolower (*p) == tolower (*str))
    ++p, ++str;

  if (* p)
    return _("unrecognized instruction");

#ifndef CGEN_MNEMONIC_OPERANDS
  if (* str && !isspace (* str))
    return _("unrecognized instruction");
#endif

  CGEN_INIT_PARSE (cd);
  cgen_init_parse_operand (cd);
#ifdef CGEN_MNEMONIC_OPERANDS
  past_opcode_p = 0;
#endif

  /* We don't check for (*str != '\0') here because we want to parse
     any trailing fake arguments in the syntax string.  */
  syn = CGEN_SYNTAX_STRING (syntax);

  /* Mnemonics come first for now, ensure valid string.  */
  if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
    abort ();

  ++syn;

  while (* syn != 0)
    {
      /* Non operand chars must match exactly.  */
      if (CGEN_SYNTAX_CHAR_P (* syn))
	{
	  /* FIXME: While we allow for non-GAS callers above, we assume the
	     first char after the mnemonic part is a space.  */
	  /* FIXME: We also take inappropriate advantage of the fact that
	     GAS's input scrubber will remove extraneous blanks.  */
	  if (tolower (*str) == tolower (CGEN_SYNTAX_CHAR (* syn)))
	    {
#ifdef CGEN_MNEMONIC_OPERANDS
	      if (* syn == ' ')
		past_opcode_p = 1;
#endif
	      ++ syn;
	      ++ str;
	    }
	  else
	    {
	      /* Syntax char didn't match.  Can't be this insn.  */
	      static char msg [80];
	      /* xgettext:c-format */
	      sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
		       *syn, *str);
	      return msg;
	    }
	  continue;
	}

      /* We have an operand of some sort.  */
      errmsg = @arch@_cgen_parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
					  &str, fields);
      if (errmsg)
	return errmsg;

      /* Done with this operand, continue with next one.  */
      ++ syn;
    }

  /* If we're at the end of the syntax string, we're done.  */
  if (* syn == '\0')
    {
      /* FIXME: For the moment we assume a valid `str' can only contain
	 blanks now.  IE: We needn't try again with a longer version of
	 the insn and it is assumed that longer versions of insns appear
	 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3).  */
      while (isspace (* str))
	++ str;

      if (* str != '\0')
	return _("junk at end of line"); /* FIXME: would like to include `str' */

      return NULL;
    }

  /* We couldn't parse it.  */
  return _("unrecognized instruction");
}
\f
/* Main entry point.
   This routine is called for each instruction to be assembled.
   STR points to the insn to be assembled.
   We assume all necessary tables have been initialized.
   The assembled instruction, less any fixups, is stored in BUF.
   Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
   still needs to be converted to target byte order, otherwise BUF is an array
   of bytes in target byte order.
   The result is a pointer to the insn's entry in the opcode table,
   or NULL if an error occured (an error message will have already been
   printed).

   Note that when processing (non-alias) macro-insns,
   this function recurses.

   ??? It's possible to make this cpu-independent.
   One would have to deal with a few minor things.
   At this point in time doing so would be more of a curiosity than useful
   [for example this file isn't _that_ big], but keeping the possibility in
   mind helps keep the design clean.  */

const CGEN_INSN *
@arch@_cgen_assemble_insn (cd, str, fields, buf, errmsg)
     CGEN_CPU_DESC cd;
     const char *str;
     CGEN_FIELDS *fields;
     CGEN_INSN_BYTES_PTR buf;
     char **errmsg;
{
  const char *start;
  CGEN_INSN_LIST *ilist;
  const char *tmp_errmsg = NULL;

  /* Skip leading white space.  */
  while (isspace (* str))
    ++ str;

  /* The instructions are stored in hashed lists.
     Get the first in the list.  */
  ilist = CGEN_ASM_LOOKUP_INSN (cd, str);

  /* Keep looking until we find a match.  */

  start = str;
  for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
    {
      const CGEN_INSN *insn = ilist->insn;

#ifdef CGEN_VALIDATE_INSN_SUPPORTED 
      /* not usually needed as unsupported opcodes shouldn't be in the hash lists */
      /* Is this insn supported by the selected cpu?  */
      if (! @arch@_cgen_insn_supported (cd, insn))
	continue;
#endif

      /* If the RELAX attribute is set, this is an insn that shouldn't be
	 chosen immediately.  Instead, it is used during assembler/linker
	 relaxation if possible.  */
      if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX) != 0)
	continue;

      str = start;

      /* Allow parse/insert handlers to obtain length of insn.  */
      CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);

      tmp_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
      if (tmp_errmsg != NULL)
	continue;

      /* ??? 0 is passed for `pc' */
      tmp_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
					      (bfd_vma) 0);
      if (tmp_errmsg != NULL)
        continue;

      /* It is up to the caller to actually output the insn and any
         queued relocs.  */
      return insn;
    }

  /* Make sure we leave this with something at this point. */
  if (tmp_errmsg == NULL)
    tmp_errmsg = "unknown mnemonic";

  {
    static char errbuf[150];

#ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
    /* if verbose error messages, use errmsg from CGEN_PARSE_FN */
    if (strlen (start) > 50)
      /* xgettext:c-format */
      sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
    else 
      /* xgettext:c-format */
      sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
#else
    if (strlen (start) > 50)
      /* xgettext:c-format */
      sprintf (errbuf, _("bad instruction `%.50s...'"), start);
    else 
      /* xgettext:c-format */
      sprintf (errbuf, _("bad instruction `%.50s'"), start);
#endif
      
    *errmsg = errbuf;
    return NULL;
  }
}
\f
#if 0 /* This calls back to GAS which we can't do without care.  */

/* Record each member of OPVALS in the assembler's symbol table.
   This lets GAS parse registers for us.
   ??? Interesting idea but not currently used.  */

/* Record each member of OPVALS in the assembler's symbol table.
   FIXME: Not currently used.  */

void
@arch@_cgen_asm_hash_keywords (cd, opvals)
     CGEN_CPU_DESC cd;
     CGEN_KEYWORD *opvals;
{
  CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL);
  const CGEN_KEYWORD_ENTRY * ke;

  while ((ke = cgen_keyword_search_next (& search)) != NULL)
    {
#if 0 /* Unnecessary, should be done in the search routine.  */
      if (! @arch@_cgen_opval_supported (ke))
	continue;
#endif
      cgen_asm_record_register (cd, ke->name, ke->value);
    }
}

#endif /* 0 */
Commit	Line	Data
f6e6b40f BE	1	/* Assembler interface for targets using CGEN. -- C --
	2	CGEN: Cpu tools GENerator
	3
	4	THIS FILE IS MACHINE GENERATED WITH CGEN.
	5	- the resultant file is machine generated, cgen-asm.in isn't
	6
	7	Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
	8
	9	This file is part of the GNU Binutils and GDB, the GNU debugger.
	10
	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)
	14	any later version.
	15
	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.
	20
	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. */
	24
	25	/* ??? Eventually more and more of this stuff can go to cpu-independent files.
	26	Keep that in mind. */
	27
	28	#include "sysdep.h"
	29	#include <ctype.h>
	30	#include <stdio.h>
	31	#include "ansidecl.h"
	32	#include "bfd.h"
	33	#include "symcat.h"
	34	#include "@prefix@-desc.h"
	35	#include "@prefix@-opc.h"
	36	#include "opintl.h"
	37
	38	#undef min
	39	#define min(a,b) ((a) < (b) ? (a) : (b))
	40	#undef max
	41	#define max(a,b) ((a) > (b) ? (a) : (b))
	42
	43	static const char * parse_insn_normal
	44	PARAMS ((CGEN_CPU_DESC, const CGEN_INSN , const char , CGEN_FIELDS ));
	45	\f
	46	/* -- assembler routines inserted here */
	47	\f
	48	/* Default insn parser.
	49
	50	The syntax string is scanned and operands are parsed and stored in FIELDS.
	51	Relocs are queued as we go via other callbacks.
	52
	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.
	58
	59	Returns NULL for success, an error message for failure.
	60	*/
	61
	62	static const char *
	63	parse_insn_normal (cd, insn, strp, fields)
	64	CGEN_CPU_DESC cd;
65	const CGEN_INSN *insn;
66	const char **strp;
67	CGEN_FIELDS *fields;
68	{
69	/* ??? Runtime added insns not handled yet. */
70	const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
71	const char str = strp;
72	const char *errmsg;
73	const char *p;
74	const unsigned char * syn;
75	#ifdef CGEN_MNEMONIC_OPERANDS
76	/* FIXME: wip */
77	int past_opcode_p;
78	#endif
79
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))
86	++p, ++str;
87
88	if (* p)
89	return _("unrecognized instruction");
90
91	#ifndef CGEN_MNEMONIC_OPERANDS
92	if (* str && !isspace (* str))
93	return _("unrecognized instruction");
94	#endif
95
96	CGEN_INIT_PARSE (cd);
97	cgen_init_parse_operand (cd);
98	#ifdef CGEN_MNEMONIC_OPERANDS
99	past_opcode_p = 0;
100	#endif
101
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);
105
106	/* Mnemonics come first for now, ensure valid string. */
107	if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
108	abort ();
109
110	++syn;
111
112	while (* syn != 0)
113	{
114	/* Non operand chars must match exactly. */
115	if (CGEN_SYNTAX_CHAR_P (* syn))
116	{
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)))
122	{
123	#ifdef CGEN_MNEMONIC_OPERANDS
124	if (* syn == ' ')
125	past_opcode_p = 1;
126	#endif
127	++ syn;
128	++ str;
129	}
130	else
131	{
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	syn, str);
137	return msg;
138	}
139	continue;
140	}
141
142	/* We have an operand of some sort. */
143	errmsg = @arch@_cgen_parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
144	&str, fields);
145	if (errmsg)
146	return errmsg;
147
148	/* Done with this operand, continue with next one. */
149	++ syn;
150	}
151
152	/* If we're at the end of the syntax string, we're done. */
153	if (* syn == '\0')
154	{
155	/* FIXME: For the moment we assume a valid `str' can only contain
156	blanks now. IE: We needn't try again with a longer version of
157	the insn and it is assumed that longer versions of insns appear
158	before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
159	while (isspace (* str))
160	++ str;
161
162	if (* str != '\0')
163	return _("junk at end of line"); /* FIXME: would like to include `str' */
164
165	return NULL;
166	}
167
168	/* We couldn't parse it. */
169	return _("unrecognized instruction");
170	}
171	\f
172	/* Main entry point.
173	This routine is called for each instruction to be assembled.
174	STR points to the insn to be assembled.
175	We assume all necessary tables have been initialized.
176	The assembled instruction, less any fixups, is stored in BUF.
177	Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
178	still needs to be converted to target byte order, otherwise BUF is an array
179	of bytes in target byte order.
180	The result is a pointer to the insn's entry in the opcode table,
181	or NULL if an error occured (an error message will have already been
182	printed).
183
184	Note that when processing (non-alias) macro-insns,
185	this function recurses.
186
187	??? It's possible to make this cpu-independent.
188	One would have to deal with a few minor things.
189	At this point in time doing so would be more of a curiosity than useful
190	[for example this file isn't _that_ big], but keeping the possibility in
191	mind helps keep the design clean. */
192
193	const CGEN_INSN *
194	@arch@_cgen_assemble_insn (cd, str, fields, buf, errmsg)
195	CGEN_CPU_DESC cd;
196	const char *str;
197	CGEN_FIELDS *fields;
198	CGEN_INSN_BYTES_PTR buf;
199	char **errmsg;
200	{
201	const char *start;
202	CGEN_INSN_LIST *ilist;
203	const char *tmp_errmsg = NULL;
204
205	/* Skip leading white space. */
206	while (isspace (* str))
207	++ str;
208
209	/* The instructions are stored in hashed lists.
210	Get the first in the list. */
211	ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
212
213	/* Keep looking until we find a match. */
214
215	start = str;
216	for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
217	{
218	const CGEN_INSN *insn = ilist->insn;
219
220	#ifdef CGEN_VALIDATE_INSN_SUPPORTED
221	/* not usually needed as unsupported opcodes shouldn't be in the hash lists */
222	/* Is this insn supported by the selected cpu? */
223	if (! @arch@_cgen_insn_supported (cd, insn))
224	continue;
225	#endif
226
227	/* If the RELAX attribute is set, this is an insn that shouldn't be
228	chosen immediately. Instead, it is used during assembler/linker
229	relaxation if possible. */
230	if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX) != 0)
231	continue;
232
233	str = start;
234
235	/* Allow parse/insert handlers to obtain length of insn. */
236	CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
237
238	tmp_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
239	if (tmp_errmsg != NULL)
240	continue;
241
242	/* ??? 0 is passed for `pc' */
243	tmp_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
244	(bfd_vma) 0);
245	if (tmp_errmsg != NULL)
246	continue;
247
248	/* It is up to the caller to actually output the insn and any
249	queued relocs. */
250	return insn;
251	}
252
253	/* Make sure we leave this with something at this point. */
254	if (tmp_errmsg == NULL)
255	tmp_errmsg = "unknown mnemonic";
256
257	{
258	static char errbuf[150];
259
260	#ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
261	/* if verbose error messages, use errmsg from CGEN_PARSE_FN */
262	if (strlen (start) > 50)
263	/* xgettext:c-format */
264	sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
265	else
266	/* xgettext:c-format */
267	sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
268	#else
269	if (strlen (start) > 50)
270	/* xgettext:c-format */
271	sprintf (errbuf, _("bad instruction `%.50s...'"), start);
272	else
273	/* xgettext:c-format */
274	sprintf (errbuf, _("bad instruction `%.50s'"), start);
275	#endif
276
277	*errmsg = errbuf;
278	return NULL;
279	}
280	}
281	\f
282	#if 0 /* This calls back to GAS which we can't do without care. */
283
284	/* Record each member of OPVALS in the assembler's symbol table.
285	This lets GAS parse registers for us.
286	??? Interesting idea but not currently used. */
287
288	/* Record each member of OPVALS in the assembler's symbol table.
289	FIXME: Not currently used. */
290
291	void
292	@arch@_cgen_asm_hash_keywords (cd, opvals)
293	CGEN_CPU_DESC cd;
294	CGEN_KEYWORD *opvals;
295	{
296	CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL);
297	const CGEN_KEYWORD_ENTRY * ke;
298
299	while ((ke = cgen_keyword_search_next (& search)) != NULL)
300	{
301	#if 0 /* Unnecessary, should be done in the search routine. */
302	if (! @arch@_cgen_opval_supported (ke))
303	continue;
304	#endif
305	cgen_asm_record_register (cd, ke->name, ke->value);
306	}
307	}
308
309	#endif /* 0 */