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 1996, 1997, 1998, 1999, 2000, 2001, 2005, 2007
8   Free Software Foundation, Inc.
9
10   This file is part of libopcodes.
11
12   This library is free software; you can redistribute it and/or modify
13   it under the terms of the GNU General Public License as published by
14   the Free Software Foundation; either version 3, or (at your option)
15   any later version.
16
17   It is distributed in the hope that it will be useful, but WITHOUT
18   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
19   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
20   License for more details.
21
22   You should have received a copy of the GNU General Public License
23   along with this program; if not, write to the Free Software Foundation, Inc.,
24   51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
25
26
27/* ??? Eventually more and more of this stuff can go to cpu-independent files.
28   Keep that in mind.  */
29
30#include "sysdep.h"
31#include <stdio.h>
32#include "ansidecl.h"
33#include "bfd.h"
34#include "symcat.h"
35#include "xstormy16-desc.h"
36#include "xstormy16-opc.h"
37#include "opintl.h"
38#include "xregex.h"
39#include "libiberty.h"
40#include "safe-ctype.h"
41
42#undef  min
43#define min(a,b) ((a) < (b) ? (a) : (b))
44#undef  max
45#define max(a,b) ((a) > (b) ? (a) : (b))
46
47static const char * parse_insn_normal
48  (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *);
49
50/* -- assembler routines inserted here.  */
51
52/* -- asm.c */
53
54/* The machine-independent code doesn't know how to disambiguate
55     mov (foo),r3
56   and
57     mov (r2),r3
58   where 'foo' is a label.  This helps it out. */
59
60static const char *
61parse_mem8 (CGEN_CPU_DESC cd,
62	    const char **strp,
63	    int opindex,
64	    unsigned long *valuep)
65{
66  if (**strp == '(')
67    {
68      const char *s = *strp;
69
70      if (s[1] == '-' && s[2] == '-')
71	return _("Bad register in preincrement");
72
73      while (ISALNUM (*++s))
74	;
75      if (s[0] == '+' && s[1] == '+' && (s[2] == ')' || s[2] == ','))
76	return _("Bad register in postincrement");
77      if (s[0] == ',' || s[0] == ')')
78	return _("Bad register name");
79    }
80  else if (cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names,
81			       (long *) valuep) == NULL)
82    return _("Label conflicts with register name");
83  else if (strncasecmp (*strp, "rx,", 3) == 0
84	   || strncasecmp (*strp, "rxl,", 3) == 0
85	   || strncasecmp (*strp, "rxh,", 3) == 0)
86    return _("Label conflicts with `Rx'");
87  else if (**strp == '#')
88    return _("Bad immediate expression");
89
90  return cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
91}
92
93/* For the add and subtract instructions, there are two immediate forms,
94   one for small operands and one for large ones.  We want to use
95   the small one when possible, but we do not want to generate relocs
96   of the small size.  This is somewhat tricky.  */
97
98static const char *
99parse_small_immediate (CGEN_CPU_DESC cd,
100		       const char **strp,
101		       int opindex,
102		       unsigned long *valuep)
103{
104  bfd_vma value;
105  enum cgen_parse_operand_result result;
106  const char *errmsg;
107
108  if (**strp == '@')
109    return _("No relocation for small immediate");
110
111  errmsg = (* cd->parse_operand_fn)
112    (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE,
113     & result, & value);
114
115  if (errmsg)
116    return errmsg;
117
118  if (result != CGEN_PARSE_OPERAND_RESULT_NUMBER)
119    return _("Small operand was not an immediate number");
120
121  *valuep = value;
122  return NULL;
123}
124
125/* Literal scan be either a normal literal, a @hi() or @lo relocation.  */
126
127static const char *
128parse_immediate16 (CGEN_CPU_DESC cd,
129		   const char **strp,
130		   int opindex,
131		   unsigned long *valuep)
132{
133  const char *errmsg;
134  enum cgen_parse_operand_result result;
135  bfd_reloc_code_real_type code = BFD_RELOC_NONE;
136  bfd_vma value;
137
138  if (strncmp (*strp, "@hi(", 4) == 0)
139    {
140      *strp += 4;
141      code = BFD_RELOC_HI16;
142    }
143  else
144  if (strncmp (*strp, "@lo(", 4) == 0)
145    {
146      *strp += 4;
147      code = BFD_RELOC_LO16;
148    }
149
150  if (code == BFD_RELOC_NONE)
151    errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
152  else
153    {
154      errmsg = cgen_parse_address (cd, strp, opindex, code, &result, &value);
155      if ((errmsg == NULL) &&
156	  (result != CGEN_PARSE_OPERAND_RESULT_QUEUED))
157	errmsg = _("Operand is not a symbol");
158
159      *valuep = value;
160      if ((code == BFD_RELOC_HI16 || code == BFD_RELOC_LO16)
161	  && **strp == ')')
162	*strp += 1;
163      else
164        {
165	  errmsg = _("Syntax error: No trailing ')'");
166	  return errmsg;
167	}
168    }
169  return errmsg;
170}
171/* -- */
172
173const char * xstormy16_cgen_parse_operand
174  (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
175
176/* Main entry point for operand parsing.
177
178   This function is basically just a big switch statement.  Earlier versions
179   used tables to look up the function to use, but
180   - if the table contains both assembler and disassembler functions then
181     the disassembler contains much of the assembler and vice-versa,
182   - there's a lot of inlining possibilities as things grow,
183   - using a switch statement avoids the function call overhead.
184
185   This function could be moved into `parse_insn_normal', but keeping it
186   separate makes clear the interface between `parse_insn_normal' and each of
187   the handlers.  */
188
189const char *
190xstormy16_cgen_parse_operand (CGEN_CPU_DESC cd,
191			   int opindex,
192			   const char ** strp,
193			   CGEN_FIELDS * fields)
194{
195  const char * errmsg = NULL;
196  /* Used by scalar operands that still need to be parsed.  */
197  long junk ATTRIBUTE_UNUSED;
198
199  switch (opindex)
200    {
201    case XSTORMY16_OPERAND_RB :
202      errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_Rb_names, & fields->f_Rb);
203      break;
204    case XSTORMY16_OPERAND_RBJ :
205      errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_Rb_names, & fields->f_Rbj);
206      break;
207    case XSTORMY16_OPERAND_RD :
208      errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rd);
209      break;
210    case XSTORMY16_OPERAND_RDM :
211      errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rdm);
212      break;
213    case XSTORMY16_OPERAND_RM :
214      errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rm);
215      break;
216    case XSTORMY16_OPERAND_RS :
217      errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rs);
218      break;
219    case XSTORMY16_OPERAND_ABS24 :
220      errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_ABS24, (unsigned long *) (& fields->f_abs24));
221      break;
222    case XSTORMY16_OPERAND_BCOND2 :
223      errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_h_branchcond, & fields->f_op2);
224      break;
225    case XSTORMY16_OPERAND_BCOND5 :
226      errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_h_branchcond, & fields->f_op5);
227      break;
228    case XSTORMY16_OPERAND_HMEM8 :
229      errmsg = parse_mem8 (cd, strp, XSTORMY16_OPERAND_HMEM8, (unsigned long *) (& fields->f_hmem8));
230      break;
231    case XSTORMY16_OPERAND_IMM12 :
232      errmsg = cgen_parse_signed_integer (cd, strp, XSTORMY16_OPERAND_IMM12, (long *) (& fields->f_imm12));
233      break;
234    case XSTORMY16_OPERAND_IMM16 :
235      errmsg = parse_immediate16 (cd, strp, XSTORMY16_OPERAND_IMM16, (unsigned long *) (& fields->f_imm16));
236      break;
237    case XSTORMY16_OPERAND_IMM2 :
238      errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM2, (unsigned long *) (& fields->f_imm2));
239      break;
240    case XSTORMY16_OPERAND_IMM3 :
241      errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM3, (unsigned long *) (& fields->f_imm3));
242      break;
243    case XSTORMY16_OPERAND_IMM3B :
244      errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM3B, (unsigned long *) (& fields->f_imm3b));
245      break;
246    case XSTORMY16_OPERAND_IMM4 :
247      errmsg = parse_small_immediate (cd, strp, XSTORMY16_OPERAND_IMM4, (unsigned long *) (& fields->f_imm4));
248      break;
249    case XSTORMY16_OPERAND_IMM8 :
250      errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM8, (unsigned long *) (& fields->f_imm8));
251      break;
252    case XSTORMY16_OPERAND_IMM8SMALL :
253      errmsg = parse_small_immediate (cd, strp, XSTORMY16_OPERAND_IMM8SMALL, (unsigned long *) (& fields->f_imm8));
254      break;
255    case XSTORMY16_OPERAND_LMEM8 :
256      errmsg = parse_mem8 (cd, strp, XSTORMY16_OPERAND_LMEM8, (unsigned long *) (& fields->f_lmem8));
257      break;
258    case XSTORMY16_OPERAND_REL12 :
259      errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL12, (unsigned long *) (& fields->f_rel12));
260      break;
261    case XSTORMY16_OPERAND_REL12A :
262      errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL12A, (unsigned long *) (& fields->f_rel12a));
263      break;
264    case XSTORMY16_OPERAND_REL8_2 :
265      errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL8_2, (unsigned long *) (& fields->f_rel8_2));
266      break;
267    case XSTORMY16_OPERAND_REL8_4 :
268      errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL8_4, (unsigned long *) (& fields->f_rel8_4));
269      break;
270    case XSTORMY16_OPERAND_WS2 :
271      errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_h_wordsize, & fields->f_op2m);
272      break;
273
274    default :
275      /* xgettext:c-format */
276      fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
277      abort ();
278  }
279
280  return errmsg;
281}
282
283cgen_parse_fn * const xstormy16_cgen_parse_handlers[] =
284{
285  parse_insn_normal,
286};
287
288void
289xstormy16_cgen_init_asm (CGEN_CPU_DESC cd)
290{
291  xstormy16_cgen_init_opcode_table (cd);
292  xstormy16_cgen_init_ibld_table (cd);
293  cd->parse_handlers = & xstormy16_cgen_parse_handlers[0];
294  cd->parse_operand = xstormy16_cgen_parse_operand;
295#ifdef CGEN_ASM_INIT_HOOK
296CGEN_ASM_INIT_HOOK
297#endif
298}
299
300
301
302/* Regex construction routine.
303
304   This translates an opcode syntax string into a regex string,
305   by replacing any non-character syntax element (such as an
306   opcode) with the pattern '.*'
307
308   It then compiles the regex and stores it in the opcode, for
309   later use by xstormy16_cgen_assemble_insn
310
311   Returns NULL for success, an error message for failure.  */
312
313char *
314xstormy16_cgen_build_insn_regex (CGEN_INSN *insn)
315{
316  CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
317  const char *mnem = CGEN_INSN_MNEMONIC (insn);
318  char rxbuf[CGEN_MAX_RX_ELEMENTS];
319  char *rx = rxbuf;
320  const CGEN_SYNTAX_CHAR_TYPE *syn;
321  int reg_err;
322
323  syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
324
325  /* Mnemonics come first in the syntax string.  */
326  if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
327    return _("missing mnemonic in syntax string");
328  ++syn;
329
330  /* Generate a case sensitive regular expression that emulates case
331     insensitive matching in the "C" locale.  We cannot generate a case
332     insensitive regular expression because in Turkish locales, 'i' and 'I'
333     are not equal modulo case conversion.  */
334
335  /* Copy the literal mnemonic out of the insn.  */
336  for (; *mnem; mnem++)
337    {
338      char c = *mnem;
339
340      if (ISALPHA (c))
341	{
342	  *rx++ = '[';
343	  *rx++ = TOLOWER (c);
344	  *rx++ = TOUPPER (c);
345	  *rx++ = ']';
346	}
347      else
348	*rx++ = c;
349    }
350
351  /* Copy any remaining literals from the syntax string into the rx.  */
352  for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
353    {
354      if (CGEN_SYNTAX_CHAR_P (* syn))
355	{
356	  char c = CGEN_SYNTAX_CHAR (* syn);
357
358	  switch (c)
359	    {
360	      /* Escape any regex metacharacters in the syntax.  */
361	    case '.': case '[': case '\\':
362	    case '*': case '^': case '$':
363
364#ifdef CGEN_ESCAPE_EXTENDED_REGEX
365	    case '?': case '{': case '}':
366	    case '(': case ')': case '*':
367	    case '|': case '+': case ']':
368#endif
369	      *rx++ = '\\';
370	      *rx++ = c;
371	      break;
372
373	    default:
374	      if (ISALPHA (c))
375		{
376		  *rx++ = '[';
377		  *rx++ = TOLOWER (c);
378		  *rx++ = TOUPPER (c);
379		  *rx++ = ']';
380		}
381	      else
382		*rx++ = c;
383	      break;
384	    }
385	}
386      else
387	{
388	  /* Replace non-syntax fields with globs.  */
389	  *rx++ = '.';
390	  *rx++ = '*';
391	}
392    }
393
394  /* Trailing whitespace ok.  */
395  * rx++ = '[';
396  * rx++ = ' ';
397  * rx++ = '\t';
398  * rx++ = ']';
399  * rx++ = '*';
400
401  /* But anchor it after that.  */
402  * rx++ = '$';
403  * rx = '\0';
404
405  CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
406  reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
407
408  if (reg_err == 0)
409    return NULL;
410  else
411    {
412      static char msg[80];
413
414      regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
415      regfree ((regex_t *) CGEN_INSN_RX (insn));
416      free (CGEN_INSN_RX (insn));
417      (CGEN_INSN_RX (insn)) = NULL;
418      return msg;
419    }
420}
421
422
423/* Default insn parser.
424
425   The syntax string is scanned and operands are parsed and stored in FIELDS.
426   Relocs are queued as we go via other callbacks.
427
428   ??? Note that this is currently an all-or-nothing parser.  If we fail to
429   parse the instruction, we return 0 and the caller will start over from
430   the beginning.  Backtracking will be necessary in parsing subexpressions,
431   but that can be handled there.  Not handling backtracking here may get
432   expensive in the case of the m68k.  Deal with later.
433
434   Returns NULL for success, an error message for failure.  */
435
436static const char *
437parse_insn_normal (CGEN_CPU_DESC cd,
438		   const CGEN_INSN *insn,
439		   const char **strp,
440		   CGEN_FIELDS *fields)
441{
442  /* ??? Runtime added insns not handled yet.  */
443  const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
444  const char *str = *strp;
445  const char *errmsg;
446  const char *p;
447  const CGEN_SYNTAX_CHAR_TYPE * syn;
448#ifdef CGEN_MNEMONIC_OPERANDS
449  /* FIXME: wip */
450  int past_opcode_p;
451#endif
452
453  /* For now we assume the mnemonic is first (there are no leading operands).
454     We can parse it without needing to set up operand parsing.
455     GAS's input scrubber will ensure mnemonics are lowercase, but we may
456     not be called from GAS.  */
457  p = CGEN_INSN_MNEMONIC (insn);
458  while (*p && TOLOWER (*p) == TOLOWER (*str))
459    ++p, ++str;
460
461  if (* p)
462    return _("unrecognized instruction");
463
464#ifndef CGEN_MNEMONIC_OPERANDS
465  if (* str && ! ISSPACE (* str))
466    return _("unrecognized instruction");
467#endif
468
469  CGEN_INIT_PARSE (cd);
470  cgen_init_parse_operand (cd);
471#ifdef CGEN_MNEMONIC_OPERANDS
472  past_opcode_p = 0;
473#endif
474
475  /* We don't check for (*str != '\0') here because we want to parse
476     any trailing fake arguments in the syntax string.  */
477  syn = CGEN_SYNTAX_STRING (syntax);
478
479  /* Mnemonics come first for now, ensure valid string.  */
480  if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
481    abort ();
482
483  ++syn;
484
485  while (* syn != 0)
486    {
487      /* Non operand chars must match exactly.  */
488      if (CGEN_SYNTAX_CHAR_P (* syn))
489	{
490	  /* FIXME: While we allow for non-GAS callers above, we assume the
491	     first char after the mnemonic part is a space.  */
492	  /* FIXME: We also take inappropriate advantage of the fact that
493	     GAS's input scrubber will remove extraneous blanks.  */
494	  if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
495	    {
496#ifdef CGEN_MNEMONIC_OPERANDS
497	      if (CGEN_SYNTAX_CHAR(* syn) == ' ')
498		past_opcode_p = 1;
499#endif
500	      ++ syn;
501	      ++ str;
502	    }
503	  else if (*str)
504	    {
505	      /* Syntax char didn't match.  Can't be this insn.  */
506	      static char msg [80];
507
508	      /* xgettext:c-format */
509	      sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
510		       CGEN_SYNTAX_CHAR(*syn), *str);
511	      return msg;
512	    }
513	  else
514	    {
515	      /* Ran out of input.  */
516	      static char msg [80];
517
518	      /* xgettext:c-format */
519	      sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
520		       CGEN_SYNTAX_CHAR(*syn));
521	      return msg;
522	    }
523	  continue;
524	}
525
526      /* We have an operand of some sort.  */
527      errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
528					  &str, fields);
529      if (errmsg)
530	return errmsg;
531
532      /* Done with this operand, continue with next one.  */
533      ++ syn;
534    }
535
536  /* If we're at the end of the syntax string, we're done.  */
537  if (* syn == 0)
538    {
539      /* FIXME: For the moment we assume a valid `str' can only contain
540	 blanks now.  IE: We needn't try again with a longer version of
541	 the insn and it is assumed that longer versions of insns appear
542	 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3).  */
543      while (ISSPACE (* str))
544	++ str;
545
546      if (* str != '\0')
547	return _("junk at end of line"); /* FIXME: would like to include `str' */
548
549      return NULL;
550    }
551
552  /* We couldn't parse it.  */
553  return _("unrecognized instruction");
554}
555
556/* Main entry point.
557   This routine is called for each instruction to be assembled.
558   STR points to the insn to be assembled.
559   We assume all necessary tables have been initialized.
560   The assembled instruction, less any fixups, is stored in BUF.
561   Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
562   still needs to be converted to target byte order, otherwise BUF is an array
563   of bytes in target byte order.
564   The result is a pointer to the insn's entry in the opcode table,
565   or NULL if an error occured (an error message will have already been
566   printed).
567
568   Note that when processing (non-alias) macro-insns,
569   this function recurses.
570
571   ??? It's possible to make this cpu-independent.
572   One would have to deal with a few minor things.
573   At this point in time doing so would be more of a curiosity than useful
574   [for example this file isn't _that_ big], but keeping the possibility in
575   mind helps keep the design clean.  */
576
577const CGEN_INSN *
578xstormy16_cgen_assemble_insn (CGEN_CPU_DESC cd,
579			   const char *str,
580			   CGEN_FIELDS *fields,
581			   CGEN_INSN_BYTES_PTR buf,
582			   char **errmsg)
583{
584  const char *start;
585  CGEN_INSN_LIST *ilist;
586  const char *parse_errmsg = NULL;
587  const char *insert_errmsg = NULL;
588  int recognized_mnemonic = 0;
589
590  /* Skip leading white space.  */
591  while (ISSPACE (* str))
592    ++ str;
593
594  /* The instructions are stored in hashed lists.
595     Get the first in the list.  */
596  ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
597
598  /* Keep looking until we find a match.  */
599  start = str;
600  for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
601    {
602      const CGEN_INSN *insn = ilist->insn;
603      recognized_mnemonic = 1;
604
605#ifdef CGEN_VALIDATE_INSN_SUPPORTED
606      /* Not usually needed as unsupported opcodes
607	 shouldn't be in the hash lists.  */
608      /* Is this insn supported by the selected cpu?  */
609      if (! xstormy16_cgen_insn_supported (cd, insn))
610	continue;
611#endif
612      /* If the RELAXED attribute is set, this is an insn that shouldn't be
613	 chosen immediately.  Instead, it is used during assembler/linker
614	 relaxation if possible.  */
615      if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
616	continue;
617
618      str = start;
619
620      /* Skip this insn if str doesn't look right lexically.  */
621      if (CGEN_INSN_RX (insn) != NULL &&
622	  regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
623	continue;
624
625      /* Allow parse/insert handlers to obtain length of insn.  */
626      CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
627
628      parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
629      if (parse_errmsg != NULL)
630	continue;
631
632      /* ??? 0 is passed for `pc'.  */
633      insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
634						 (bfd_vma) 0);
635      if (insert_errmsg != NULL)
636        continue;
637
638      /* It is up to the caller to actually output the insn and any
639         queued relocs.  */
640      return insn;
641    }
642
643  {
644    static char errbuf[150];
645#ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
646    const char *tmp_errmsg;
647
648    /* If requesting verbose error messages, use insert_errmsg.
649       Failing that, use parse_errmsg.  */
650    tmp_errmsg = (insert_errmsg ? insert_errmsg :
651		  parse_errmsg ? parse_errmsg :
652		  recognized_mnemonic ?
653		  _("unrecognized form of instruction") :
654		  _("unrecognized instruction"));
655
656    if (strlen (start) > 50)
657      /* xgettext:c-format */
658      sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
659    else
660      /* xgettext:c-format */
661      sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
662#else
663    if (strlen (start) > 50)
664      /* xgettext:c-format */
665      sprintf (errbuf, _("bad instruction `%.50s...'"), start);
666    else
667      /* xgettext:c-format */
668      sprintf (errbuf, _("bad instruction `%.50s'"), start);
669#endif
670
671    *errmsg = errbuf;
672    return NULL;
673  }
674}
675