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 1996, 1997, 1998, 1999, 2000, 2001, 2005
8 Free Software Foundation, Inc.
10 This file is part of the GNU Binutils and GDB, the GNU debugger.
12 This program 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 2, or (at your option)
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
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. */
26 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
34 #include "iq2000-desc.h"
35 #include "iq2000-opc.h"
38 #include "libiberty.h"
39 #include "safe-ctype.h"
42 #define min(a,b) ((a) < (b) ? (a) : (b))
44 #define max(a,b) ((a) > (b) ? (a) : (b))
46 static const char * parse_insn_normal
47 (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *);
49 /* -- assembler routines inserted here. */
53 #include "safe-ctype.h"
55 static const char * MISSING_CLOSING_PARENTHESIS = N_("missing `)'");
57 /* Special check to ensure that instruction exists for given machine. */
60 iq2000_cgen_insn_supported (CGEN_CPU_DESC cd, const CGEN_INSN *insn)
62 int machs = cd->machs;
64 return (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_MACH) & machs) != 0;
68 iq2000_cgen_isa_register (const char **strp)
73 if (**strp == 'r' || **strp == 'R')
79 if ('0' <= ch1 && ch1 <= '9')
86 if (('1' <= ch1 && ch1 <= '2') && ('0' <= ch2 && ch2 <= '9'))
88 if ('3' == ch1 && (ch2 == '0' || ch2 == '1'))
93 && TOLOWER ((*strp)[1]) != 'l'
94 && TOLOWER ((*strp)[1]) != 'h')
99 /* Handle negated literal. */
102 parse_mimm (CGEN_CPU_DESC cd,
105 unsigned long *valuep)
109 /* Verify this isn't a register. */
110 if (iq2000_cgen_isa_register (strp))
111 errmsg = _("immediate value cannot be register");
116 errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value);
119 long x = (-value) & 0xFFFF0000;
121 if (x != 0 && x != (long) 0xFFFF0000)
122 errmsg = _("immediate value out of range");
124 *valuep = (-value & 0xFFFF);
130 /* Handle signed/unsigned literal. */
133 parse_imm (CGEN_CPU_DESC cd,
136 unsigned long *valuep)
140 if (iq2000_cgen_isa_register (strp))
141 errmsg = _("immediate value cannot be register");
146 errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value);
149 long x = value & 0xFFFF0000;
151 if (x != 0 && x != (long) 0xFFFF0000)
152 errmsg = _("immediate value out of range");
154 *valuep = (value & 0xFFFF);
160 /* Handle iq10 21-bit jmp offset. */
163 parse_jtargq10 (CGEN_CPU_DESC cd,
166 int reloc ATTRIBUTE_UNUSED,
167 enum cgen_parse_operand_result *type_addr ATTRIBUTE_UNUSED,
172 enum cgen_parse_operand_result result_type = CGEN_PARSE_OPERAND_RESULT_NUMBER;
174 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IQ2000_OFFSET_21,
175 & result_type, & value);
176 if (errmsg == NULL && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
178 /* Check value is within 23-bits
179 (remembering that 2-bit shift right will occur). */
180 if (value > 0x7fffff)
181 return _("21-bit offset out of range");
183 *valuep = (value & 0x7FFFFF);
190 parse_hi16 (CGEN_CPU_DESC cd,
193 unsigned long *valuep)
195 if (strncasecmp (*strp, "%hi(", 4) == 0)
197 enum cgen_parse_operand_result result_type;
202 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16,
203 & result_type, & value);
205 return MISSING_CLOSING_PARENTHESIS;
209 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
211 /* If value has top-bit of %lo on, then it will
212 sign-propagate and so we compensate by adding
213 1 to the resultant %hi value. */
224 /* We add %uhi in case a user just wants the high 16-bits or is using
225 an insn like ori for %lo which does not sign-propagate. */
226 if (strncasecmp (*strp, "%uhi(", 5) == 0)
228 enum cgen_parse_operand_result result_type;
233 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IQ2000_UHI16,
234 & result_type, & value);
236 return MISSING_CLOSING_PARENTHESIS;
240 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
249 return parse_imm (cd, strp, opindex, valuep);
252 /* Handle %lo in a signed context.
253 The signedness of the value doesn't matter to %lo(), but this also
254 handles the case where %lo() isn't present. */
257 parse_lo16 (CGEN_CPU_DESC cd,
260 unsigned long *valuep)
262 if (strncasecmp (*strp, "%lo(", 4) == 0)
265 enum cgen_parse_operand_result result_type;
269 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16,
270 & result_type, & value);
272 return MISSING_CLOSING_PARENTHESIS;
275 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
281 return parse_imm (cd, strp, opindex, valuep);
284 /* Handle %lo in a negated signed context.
285 The signedness of the value doesn't matter to %lo(), but this also
286 handles the case where %lo() isn't present. */
289 parse_mlo16 (CGEN_CPU_DESC cd,
292 unsigned long *valuep)
294 if (strncasecmp (*strp, "%lo(", 4) == 0)
297 enum cgen_parse_operand_result result_type;
301 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16,
302 & result_type, & value);
304 return MISSING_CLOSING_PARENTHESIS;
307 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
308 value = (-value) & 0xffff;
313 return parse_mimm (cd, strp, opindex, valuep);
318 const char * iq2000_cgen_parse_operand
319 (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
321 /* Main entry point for operand parsing.
323 This function is basically just a big switch statement. Earlier versions
324 used tables to look up the function to use, but
325 - if the table contains both assembler and disassembler functions then
326 the disassembler contains much of the assembler and vice-versa,
327 - there's a lot of inlining possibilities as things grow,
328 - using a switch statement avoids the function call overhead.
330 This function could be moved into `parse_insn_normal', but keeping it
331 separate makes clear the interface between `parse_insn_normal' and each of
335 iq2000_cgen_parse_operand (CGEN_CPU_DESC cd,
338 CGEN_FIELDS * fields)
340 const char * errmsg = NULL;
341 /* Used by scalar operands that still need to be parsed. */
342 long junk ATTRIBUTE_UNUSED;
346 case IQ2000_OPERAND__INDEX :
347 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND__INDEX, (unsigned long *) (& fields->f_index));
349 case IQ2000_OPERAND_BASE :
350 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rs);
352 case IQ2000_OPERAND_BASEOFF :
355 errmsg = cgen_parse_address (cd, strp, IQ2000_OPERAND_BASEOFF, 0, NULL, & value);
356 fields->f_imm = value;
359 case IQ2000_OPERAND_BITNUM :
360 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_BITNUM, (unsigned long *) (& fields->f_rt));
362 case IQ2000_OPERAND_BYTECOUNT :
363 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_BYTECOUNT, (unsigned long *) (& fields->f_bytecount));
365 case IQ2000_OPERAND_CAM_Y :
366 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CAM_Y, (unsigned long *) (& fields->f_cam_y));
368 case IQ2000_OPERAND_CAM_Z :
369 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CAM_Z, (unsigned long *) (& fields->f_cam_z));
371 case IQ2000_OPERAND_CM_3FUNC :
372 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CM_3FUNC, (unsigned long *) (& fields->f_cm_3func));
374 case IQ2000_OPERAND_CM_3Z :
375 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CM_3Z, (unsigned long *) (& fields->f_cm_3z));
377 case IQ2000_OPERAND_CM_4FUNC :
378 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CM_4FUNC, (unsigned long *) (& fields->f_cm_4func));
380 case IQ2000_OPERAND_CM_4Z :
381 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CM_4Z, (unsigned long *) (& fields->f_cm_4z));
383 case IQ2000_OPERAND_COUNT :
384 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_COUNT, (unsigned long *) (& fields->f_count));
386 case IQ2000_OPERAND_EXECODE :
387 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_EXECODE, (unsigned long *) (& fields->f_excode));
389 case IQ2000_OPERAND_HI16 :
390 errmsg = parse_hi16 (cd, strp, IQ2000_OPERAND_HI16, (unsigned long *) (& fields->f_imm));
392 case IQ2000_OPERAND_IMM :
393 errmsg = parse_imm (cd, strp, IQ2000_OPERAND_IMM, (unsigned long *) (& fields->f_imm));
395 case IQ2000_OPERAND_JMPTARG :
398 errmsg = cgen_parse_address (cd, strp, IQ2000_OPERAND_JMPTARG, 0, NULL, & value);
399 fields->f_jtarg = value;
402 case IQ2000_OPERAND_JMPTARGQ10 :
405 errmsg = parse_jtargq10 (cd, strp, IQ2000_OPERAND_JMPTARGQ10, 0, NULL, & value);
406 fields->f_jtargq10 = value;
409 case IQ2000_OPERAND_LO16 :
410 errmsg = parse_lo16 (cd, strp, IQ2000_OPERAND_LO16, (unsigned long *) (& fields->f_imm));
412 case IQ2000_OPERAND_MASK :
413 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_MASK, (unsigned long *) (& fields->f_mask));
415 case IQ2000_OPERAND_MASKL :
416 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_MASKL, (unsigned long *) (& fields->f_maskl));
418 case IQ2000_OPERAND_MASKQ10 :
419 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_MASKQ10, (unsigned long *) (& fields->f_maskq10));
421 case IQ2000_OPERAND_MASKR :
422 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_MASKR, (unsigned long *) (& fields->f_rs));
424 case IQ2000_OPERAND_MLO16 :
425 errmsg = parse_mlo16 (cd, strp, IQ2000_OPERAND_MLO16, (unsigned long *) (& fields->f_imm));
427 case IQ2000_OPERAND_OFFSET :
430 errmsg = cgen_parse_address (cd, strp, IQ2000_OPERAND_OFFSET, 0, NULL, & value);
431 fields->f_offset = value;
434 case IQ2000_OPERAND_RD :
435 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rd);
437 case IQ2000_OPERAND_RD_RS :
438 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rd_rs);
440 case IQ2000_OPERAND_RD_RT :
441 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rd_rt);
443 case IQ2000_OPERAND_RS :
444 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rs);
446 case IQ2000_OPERAND_RT :
447 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rt);
449 case IQ2000_OPERAND_RT_RS :
450 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rt_rs);
452 case IQ2000_OPERAND_SHAMT :
453 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_SHAMT, (unsigned long *) (& fields->f_shamt));
457 /* xgettext:c-format */
458 fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
465 cgen_parse_fn * const iq2000_cgen_parse_handlers[] =
471 iq2000_cgen_init_asm (CGEN_CPU_DESC cd)
473 iq2000_cgen_init_opcode_table (cd);
474 iq2000_cgen_init_ibld_table (cd);
475 cd->parse_handlers = & iq2000_cgen_parse_handlers[0];
476 cd->parse_operand = iq2000_cgen_parse_operand;
481 /* Regex construction routine.
483 This translates an opcode syntax string into a regex string,
484 by replacing any non-character syntax element (such as an
485 opcode) with the pattern '.*'
487 It then compiles the regex and stores it in the opcode, for
488 later use by iq2000_cgen_assemble_insn
490 Returns NULL for success, an error message for failure. */
493 iq2000_cgen_build_insn_regex (CGEN_INSN *insn)
495 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
496 const char *mnem = CGEN_INSN_MNEMONIC (insn);
497 char rxbuf[CGEN_MAX_RX_ELEMENTS];
499 const CGEN_SYNTAX_CHAR_TYPE *syn;
502 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
504 /* Mnemonics come first in the syntax string. */
505 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
506 return _("missing mnemonic in syntax string");
509 /* Generate a case sensitive regular expression that emulates case
510 insensitive matching in the "C" locale. We cannot generate a case
511 insensitive regular expression because in Turkish locales, 'i' and 'I'
512 are not equal modulo case conversion. */
514 /* Copy the literal mnemonic out of the insn. */
515 for (; *mnem; mnem++)
530 /* Copy any remaining literals from the syntax string into the rx. */
531 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
533 if (CGEN_SYNTAX_CHAR_P (* syn))
535 char c = CGEN_SYNTAX_CHAR (* syn);
539 /* Escape any regex metacharacters in the syntax. */
540 case '.': case '[': case '\\':
541 case '*': case '^': case '$':
543 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
544 case '?': case '{': case '}':
545 case '(': case ')': case '*':
546 case '|': case '+': case ']':
567 /* Replace non-syntax fields with globs. */
573 /* Trailing whitespace ok. */
580 /* But anchor it after that. */
584 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
585 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
593 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
594 regfree ((regex_t *) CGEN_INSN_RX (insn));
595 free (CGEN_INSN_RX (insn));
596 (CGEN_INSN_RX (insn)) = NULL;
602 /* Default insn parser.
604 The syntax string is scanned and operands are parsed and stored in FIELDS.
605 Relocs are queued as we go via other callbacks.
607 ??? Note that this is currently an all-or-nothing parser. If we fail to
608 parse the instruction, we return 0 and the caller will start over from
609 the beginning. Backtracking will be necessary in parsing subexpressions,
610 but that can be handled there. Not handling backtracking here may get
611 expensive in the case of the m68k. Deal with later.
613 Returns NULL for success, an error message for failure. */
616 parse_insn_normal (CGEN_CPU_DESC cd,
617 const CGEN_INSN *insn,
621 /* ??? Runtime added insns not handled yet. */
622 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
623 const char *str = *strp;
626 const CGEN_SYNTAX_CHAR_TYPE * syn;
627 #ifdef CGEN_MNEMONIC_OPERANDS
632 /* For now we assume the mnemonic is first (there are no leading operands).
633 We can parse it without needing to set up operand parsing.
634 GAS's input scrubber will ensure mnemonics are lowercase, but we may
635 not be called from GAS. */
636 p = CGEN_INSN_MNEMONIC (insn);
637 while (*p && TOLOWER (*p) == TOLOWER (*str))
641 return _("unrecognized instruction");
643 #ifndef CGEN_MNEMONIC_OPERANDS
644 if (* str && ! ISSPACE (* str))
645 return _("unrecognized instruction");
648 CGEN_INIT_PARSE (cd);
649 cgen_init_parse_operand (cd);
650 #ifdef CGEN_MNEMONIC_OPERANDS
654 /* We don't check for (*str != '\0') here because we want to parse
655 any trailing fake arguments in the syntax string. */
656 syn = CGEN_SYNTAX_STRING (syntax);
658 /* Mnemonics come first for now, ensure valid string. */
659 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
666 /* Non operand chars must match exactly. */
667 if (CGEN_SYNTAX_CHAR_P (* syn))
669 /* FIXME: While we allow for non-GAS callers above, we assume the
670 first char after the mnemonic part is a space. */
671 /* FIXME: We also take inappropriate advantage of the fact that
672 GAS's input scrubber will remove extraneous blanks. */
673 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
675 #ifdef CGEN_MNEMONIC_OPERANDS
676 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
684 /* Syntax char didn't match. Can't be this insn. */
685 static char msg [80];
687 /* xgettext:c-format */
688 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
689 CGEN_SYNTAX_CHAR(*syn), *str);
694 /* Ran out of input. */
695 static char msg [80];
697 /* xgettext:c-format */
698 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
699 CGEN_SYNTAX_CHAR(*syn));
705 /* We have an operand of some sort. */
706 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
711 /* Done with this operand, continue with next one. */
715 /* If we're at the end of the syntax string, we're done. */
718 /* FIXME: For the moment we assume a valid `str' can only contain
719 blanks now. IE: We needn't try again with a longer version of
720 the insn and it is assumed that longer versions of insns appear
721 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
722 while (ISSPACE (* str))
726 return _("junk at end of line"); /* FIXME: would like to include `str' */
731 /* We couldn't parse it. */
732 return _("unrecognized instruction");
736 This routine is called for each instruction to be assembled.
737 STR points to the insn to be assembled.
738 We assume all necessary tables have been initialized.
739 The assembled instruction, less any fixups, is stored in BUF.
740 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
741 still needs to be converted to target byte order, otherwise BUF is an array
742 of bytes in target byte order.
743 The result is a pointer to the insn's entry in the opcode table,
744 or NULL if an error occured (an error message will have already been
747 Note that when processing (non-alias) macro-insns,
748 this function recurses.
750 ??? It's possible to make this cpu-independent.
751 One would have to deal with a few minor things.
752 At this point in time doing so would be more of a curiosity than useful
753 [for example this file isn't _that_ big], but keeping the possibility in
754 mind helps keep the design clean. */
757 iq2000_cgen_assemble_insn (CGEN_CPU_DESC cd,
760 CGEN_INSN_BYTES_PTR buf,
764 CGEN_INSN_LIST *ilist;
765 const char *parse_errmsg = NULL;
766 const char *insert_errmsg = NULL;
767 int recognized_mnemonic = 0;
769 /* Skip leading white space. */
770 while (ISSPACE (* str))
773 /* The instructions are stored in hashed lists.
774 Get the first in the list. */
775 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
777 /* Keep looking until we find a match. */
779 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
781 const CGEN_INSN *insn = ilist->insn;
782 recognized_mnemonic = 1;
784 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
785 /* Not usually needed as unsupported opcodes
786 shouldn't be in the hash lists. */
787 /* Is this insn supported by the selected cpu? */
788 if (! iq2000_cgen_insn_supported (cd, insn))
791 /* If the RELAXED attribute is set, this is an insn that shouldn't be
792 chosen immediately. Instead, it is used during assembler/linker
793 relaxation if possible. */
794 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
799 /* Skip this insn if str doesn't look right lexically. */
800 if (CGEN_INSN_RX (insn) != NULL &&
801 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
804 /* Allow parse/insert handlers to obtain length of insn. */
805 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
807 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
808 if (parse_errmsg != NULL)
811 /* ??? 0 is passed for `pc'. */
812 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
814 if (insert_errmsg != NULL)
817 /* It is up to the caller to actually output the insn and any
823 static char errbuf[150];
824 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
825 const char *tmp_errmsg;
827 /* If requesting verbose error messages, use insert_errmsg.
828 Failing that, use parse_errmsg. */
829 tmp_errmsg = (insert_errmsg ? insert_errmsg :
830 parse_errmsg ? parse_errmsg :
831 recognized_mnemonic ?
832 _("unrecognized form of instruction") :
833 _("unrecognized instruction"));
835 if (strlen (start) > 50)
836 /* xgettext:c-format */
837 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
839 /* xgettext:c-format */
840 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
842 if (strlen (start) > 50)
843 /* xgettext:c-format */
844 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
846 /* xgettext:c-format */
847 sprintf (errbuf, _("bad instruction `%.50s'"), start);