1 /* tc-arc.c -- Assembler for the ARC
2 Copyright 1994, 1995, 1997, 1999, 2000, 2001, 2002
3 Free Software Foundation, Inc.
6 This file is part of GAS, the GNU Assembler.
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
24 #include "libiberty.h"
26 #include "struc-symbol.h"
27 #include "safe-ctype.h"
29 #include "opcode/arc.h"
30 #include "../opcodes/arc-ext.h"
32 #include "dwarf2dbg.h"
34 extern int arc_get_mach PARAMS ((char *));
35 extern int arc_operand_type PARAMS ((int));
36 extern int arc_insn_not_jl PARAMS ((arc_insn));
37 extern int arc_limm_fixup_adjust PARAMS ((arc_insn));
38 extern int arc_get_noshortcut_flag PARAMS ((void));
39 extern int arc_set_ext_seg PARAMS ((void));
40 extern void arc_code_symbol PARAMS ((expressionS *));
42 static arc_insn arc_insert_operand PARAMS ((arc_insn,
43 const struct arc_operand *, int,
44 const struct arc_operand_value *,
45 offsetT, char *, unsigned int));
46 static void arc_common PARAMS ((int));
47 static void arc_extinst PARAMS ((int));
48 static void arc_extoper PARAMS ((int));
49 static void arc_option PARAMS ((int));
50 static int get_arc_exp_reloc_type PARAMS ((int, int, expressionS *,
53 static void init_opcode_tables PARAMS ((int));
55 const struct suffix_classes {
59 { "SUFFIX_COND|SUFFIX_FLAG",23 },
60 { "SUFFIX_FLAG", 11 },
61 { "SUFFIX_COND", 11 },
65 #define MAXSUFFIXCLASS (sizeof (suffixclass) / sizeof (struct suffix_classes))
67 const struct syntax_classes {
72 { "SYNTAX_3OP|OP1_MUST_BE_IMM", 26, SYNTAX_3OP|OP1_MUST_BE_IMM|SYNTAX_VALID },
73 { "OP1_MUST_BE_IMM|SYNTAX_3OP", 26, OP1_MUST_BE_IMM|SYNTAX_3OP|SYNTAX_VALID },
74 { "SYNTAX_2OP|OP1_IMM_IMPLIED", 26, SYNTAX_2OP|OP1_IMM_IMPLIED|SYNTAX_VALID },
75 { "OP1_IMM_IMPLIED|SYNTAX_2OP", 26, OP1_IMM_IMPLIED|SYNTAX_2OP|SYNTAX_VALID },
76 { "SYNTAX_3OP", 10, SYNTAX_3OP|SYNTAX_VALID },
77 { "SYNTAX_2OP", 10, SYNTAX_2OP|SYNTAX_VALID }
80 #define MAXSYNTAXCLASS (sizeof (syntaxclass) / sizeof (struct syntax_classes))
82 const pseudo_typeS md_pseudo_table[] = {
83 { "align", s_align_bytes, 0 }, /* Defaulting is invalid (0). */
84 { "comm", arc_common, 0 },
85 { "common", arc_common, 0 },
86 { "lcomm", arc_common, 1 },
87 { "lcommon", arc_common, 1 },
94 { "option", arc_option, 0 },
95 { "cpu", arc_option, 0 },
96 { "block", s_space, 0 },
97 { "extcondcode", arc_extoper, 0 },
98 { "extcoreregister", arc_extoper, 1 },
99 { "extauxregister", arc_extoper, 2 },
100 { "extinstruction", arc_extinst, 0 },
104 /* This array holds the chars that always start a comment. If the
105 pre-processor is disabled, these aren't very useful. */
106 const char comment_chars[] = "#;";
108 /* This array holds the chars that only start a comment at the beginning of
109 a line. If the line seems to have the form '# 123 filename'
110 .line and .file directives will appear in the pre-processed output */
111 /* Note that input_file.c hand checks for '#' at the beginning of the
112 first line of the input file. This is because the compiler outputs
113 #NO_APP at the beginning of its output. */
114 /* Also note that comments started like this one will always
115 work if '/' isn't otherwise defined. */
116 const char line_comment_chars[] = "#";
118 const char line_separator_chars[] = "";
120 /* Chars that can be used to separate mant from exp in floating point nums. */
121 const char EXP_CHARS[] = "eE";
123 /* Chars that mean this number is a floating point constant
124 As in 0f12.456 or 0d1.2345e12. */
125 const char FLT_CHARS[] = "rRsSfFdD";
128 extern int target_big_endian;
129 const char *arc_target_format = DEFAULT_TARGET_FORMAT;
130 static int byte_order = DEFAULT_BYTE_ORDER;
132 static segT arcext_section;
134 /* One of bfd_mach_arc_n. */
135 static int arc_mach_type = bfd_mach_arc_6;
137 /* Non-zero if the cpu type has been explicitly specified. */
138 static int mach_type_specified_p = 0;
140 /* Non-zero if opcode tables have been initialized.
141 A .option command must appear before any instructions. */
142 static int cpu_tables_init_p = 0;
144 static struct hash_control *arc_suffix_hash = NULL;
146 const char *md_shortopts = "";
147 struct option md_longopts[] = {
148 #define OPTION_EB (OPTION_MD_BASE + 0)
149 { "EB", no_argument, NULL, OPTION_EB },
150 #define OPTION_EL (OPTION_MD_BASE + 1)
151 { "EL", no_argument, NULL, OPTION_EL },
152 #define OPTION_ARC5 (OPTION_MD_BASE + 2)
153 { "marc5", no_argument, NULL, OPTION_ARC5 },
154 { "pre-v6", no_argument, NULL, OPTION_ARC5 },
155 #define OPTION_ARC6 (OPTION_MD_BASE + 3)
156 { "marc6", no_argument, NULL, OPTION_ARC6 },
157 #define OPTION_ARC7 (OPTION_MD_BASE + 4)
158 { "marc7", no_argument, NULL, OPTION_ARC7 },
159 #define OPTION_ARC8 (OPTION_MD_BASE + 5)
160 { "marc8", no_argument, NULL, OPTION_ARC8 },
161 #define OPTION_ARC (OPTION_MD_BASE + 6)
162 { "marc", no_argument, NULL, OPTION_ARC },
163 { NULL, no_argument, NULL, 0 }
165 size_t md_longopts_size = sizeof (md_longopts);
167 #define IS_SYMBOL_OPERAND(o) \
168 ((o) == 'b' || (o) == 'c' || (o) == 's' || (o) == 'o' || (o) == 'O')
170 struct arc_operand_value *get_ext_suffix (char *s);
172 /* Invocation line includes a switch not recognized by the base assembler.
173 See if it's a processor-specific option. */
176 md_parse_option (c, arg)
178 char *arg ATTRIBUTE_UNUSED;
183 arc_mach_type = bfd_mach_arc_5;
187 arc_mach_type = bfd_mach_arc_6;
190 arc_mach_type = bfd_mach_arc_7;
193 arc_mach_type = bfd_mach_arc_8;
196 byte_order = BIG_ENDIAN;
197 arc_target_format = "elf32-bigarc";
200 byte_order = LITTLE_ENDIAN;
201 arc_target_format = "elf32-littlearc";
210 md_show_usage (stream)
215 -marc[5|6|7|8] select processor variant (default arc%d)\n\
216 -EB assemble code for a big endian cpu\n\
217 -EL assemble code for a little endian cpu\n", arc_mach_type + 5);
220 /* This function is called once, at assembler startup time. It should
221 set up all the tables, etc. that the MD part of the assembler will need.
222 Opcode selection is deferred until later because we might see a .option
228 /* The endianness can be chosen "at the factory". */
229 target_big_endian = byte_order == BIG_ENDIAN;
231 if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, arc_mach_type))
232 as_warn ("could not set architecture and machine");
234 /* This call is necessary because we need to initialize `arc_operand_map'
235 which may be needed before we see the first insn. */
236 arc_opcode_init_tables (arc_get_opcode_mach (arc_mach_type,
240 /* Initialize the various opcode and operand tables.
241 MACH is one of bfd_mach_arc_xxx. */
243 init_opcode_tables (mach)
249 if ((arc_suffix_hash = hash_new ()) == NULL)
250 as_fatal ("virtual memory exhausted");
252 if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, mach))
253 as_warn ("could not set architecture and machine");
255 /* This initializes a few things in arc-opc.c that we need.
256 This must be called before the various arc_xxx_supported fns. */
257 arc_opcode_init_tables (arc_get_opcode_mach (mach, target_big_endian));
259 /* Only put the first entry of each equivalently named suffix in the
262 for (i = 0; i < arc_suffixes_count; i++)
264 if (strcmp (arc_suffixes[i].name, last) != 0)
265 hash_insert (arc_suffix_hash, arc_suffixes[i].name, (PTR) (arc_suffixes + i));
266 last = arc_suffixes[i].name;
269 /* Since registers don't have a prefix, we put them in the symbol table so
270 they can't be used as symbols. This also simplifies argument parsing as
271 we can let gas parse registers for us. The recorded register number is
272 the address of the register's entry in arc_reg_names.
274 If the register name is already in the table, then the existing
275 definition is assumed to be from an .ExtCoreRegister pseudo-op. */
277 for (i = 0; i < arc_reg_names_count; i++)
279 if (symbol_find (arc_reg_names[i].name))
281 /* Use symbol_create here instead of symbol_new so we don't try to
282 output registers into the object file's symbol table. */
283 symbol_table_insert (symbol_create (arc_reg_names[i].name,
285 (int) &arc_reg_names[i],
286 &zero_address_frag));
289 /* Tell `.option' it's too late. */
290 cpu_tables_init_p = 1;
293 /* Insert an operand value into an instruction.
294 If REG is non-NULL, it is a register number and ignore VAL. */
297 arc_insert_operand (insn, operand, mods, reg, val, file, line)
299 const struct arc_operand *operand;
301 const struct arc_operand_value *reg;
306 if (operand->bits != 32)
311 if ((operand->flags & ARC_OPERAND_SIGNED) != 0)
313 if ((operand->flags & ARC_OPERAND_SIGNOPT) != 0)
314 max = (1 << operand->bits) - 1;
316 max = (1 << (operand->bits - 1)) - 1;
317 min = - (1 << (operand->bits - 1));
321 max = (1 << operand->bits) - 1;
325 if ((operand->flags & ARC_OPERAND_NEGATIVE) != 0)
330 if (test < (offsetT) min || test > (offsetT) max)
333 "operand out of range (%s not between %ld and %ld)";
336 sprint_value (buf, test);
337 if (file == (char *) NULL)
338 as_warn (err, buf, min, max);
340 as_warn_where (file, line, err, buf, min, max);
349 insn = (*operand->insert) (insn, operand, mods, reg, (long) val, &errmsg);
350 if (errmsg != (const char *) NULL)
354 insn |= (((long) val & ((1 << operand->bits) - 1))
360 /* We need to keep a list of fixups. We can't simply generate them as
361 we go, because that would require us to first create the frag, and
362 that would screw up references to ``.''. */
365 /* index into `arc_operands' */
372 #define MAX_SUFFIXES 5
374 /* This routine is called for each instruction to be assembled. */
380 const struct arc_opcode *opcode;
381 const struct arc_opcode *std_opcode;
382 struct arc_opcode *ext_opcode;
384 const char *last_errmsg = 0;
386 static int init_tables_p = 0;
388 /* Opcode table initialization is deferred until here because we have to
389 wait for a possible .option command. */
392 init_opcode_tables (arc_mach_type);
396 /* Skip leading white space. */
397 while (ISSPACE (*str))
400 /* The instructions are stored in lists hashed by the first letter (though
401 we needn't care how they're hashed). Get the first in the list. */
403 ext_opcode = arc_ext_opcodes;
404 std_opcode = arc_opcode_lookup_asm (str);
406 /* Keep looking until we find a match. */
409 for (opcode = (ext_opcode ? ext_opcode : std_opcode);
411 opcode = (ARC_OPCODE_NEXT_ASM (opcode)
412 ? ARC_OPCODE_NEXT_ASM (opcode)
413 : (ext_opcode ? ext_opcode = NULL, std_opcode : NULL)))
415 int past_opcode_p, fc, num_suffixes;
418 struct arc_fixup fixups[MAX_FIXUPS];
419 /* Used as a sanity check. If we need a limm reloc, make sure we ask
420 for an extra 4 bytes from frag_more. */
423 const struct arc_operand_value *insn_suffixes[MAX_SUFFIXES];
425 /* Is this opcode supported by the selected cpu? */
426 if (! arc_opcode_supported (opcode))
429 /* Scan the syntax string. If it doesn't match, try the next one. */
431 arc_opcode_init_insert ();
432 insn = opcode->value;
439 /* We don't check for (*str != '\0') here because we want to parse
440 any trailing fake arguments in the syntax string. */
441 for (str = start, syn = opcode->syntax; *syn != '\0';)
444 const struct arc_operand *operand;
446 /* Non operand chars must match exactly. */
447 if (*syn != '%' || *++syn == '%')
449 /* Handle '+' specially as we want to allow "ld r0,[sp-4]". */
450 /* ??? The syntax has changed to [sp,-4]. */
451 if (0 && *syn == '+' && *str == '-')
453 /* Skip over syn's +, but leave str's - alone.
454 That makes the case identical to "ld r0,[sp+-4]". */
457 else if (*str == *syn)
469 /* We have an operand. Pick out any modifiers. */
471 while (ARC_MOD_P (arc_operands[arc_operand_map[(int) *syn]].flags))
473 mods |= arc_operands[arc_operand_map[(int) *syn]].flags & ARC_MOD_BITS;
476 operand = arc_operands + arc_operand_map[(int) *syn];
477 if (operand->fmt == 0)
478 as_fatal ("unknown syntax format character `%c'", *syn);
480 if (operand->flags & ARC_OPERAND_FAKE)
482 const char *errmsg = NULL;
485 insn = (*operand->insert) (insn, operand, mods, NULL, 0, &errmsg);
486 if (errmsg != (const char *) NULL)
488 last_errmsg = errmsg;
489 if (operand->flags & ARC_OPERAND_ERROR)
494 else if (operand->flags & ARC_OPERAND_WARN)
499 && (operand->flags && operand->flags & ARC_OPERAND_LIMM)
501 (ARC_OPERAND_ABSOLUTE_BRANCH | ARC_OPERAND_ADDRESS)))
503 fixups[fix_up_at].opindex = arc_operand_map[operand->fmt];
508 /* Are we finished with suffixes? */
509 else if (!past_opcode_p)
514 const struct arc_operand_value *suf, *suffix_end;
515 const struct arc_operand_value *suffix = NULL;
517 if (!(operand->flags & ARC_OPERAND_SUFFIX))
520 /* If we're at a space in the input string, we want to skip the
521 remaining suffixes. There may be some fake ones though, so
522 just go on to try the next one. */
530 if (mods & ARC_MOD_DOT)
538 /* This can happen in "b.nd foo" and we're currently looking
539 for "%q" (ie: a condition code suffix). */
547 /* Pick the suffix out and look it up via the hash table. */
548 for (t = s; *t && ISALNUM (*t); ++t)
552 if ((suf = get_ext_suffix (s)))
555 suf = hash_find (arc_suffix_hash, s);
558 /* This can happen in "blle foo" and we're currently using
559 the template "b%q%.n %j". The "bl" insn occurs later in
560 the table so "lle" isn't an illegal suffix. */
565 /* Is it the right type? Note that the same character is used
566 several times, so we have to examine all of them. This is
567 relatively efficient as equivalent entries are kept
568 together. If it's not the right type, don't increment `str'
569 so we try the next one in the series. */
571 if (ext_suffix_p && arc_operands[suf->type].fmt == *syn)
573 /* Insert the suffix's value into the insn. */
576 insn = (*operand->insert) (insn, operand,
577 mods, NULL, suf->value,
580 insn |= suf->value << operand->shift;
588 suffix_end = arc_suffixes + arc_suffixes_count;
590 suffix < suffix_end && strcmp (suffix->name, suf->name) == 0;
593 if (arc_operands[suffix->type].fmt == *syn)
595 /* Insert the suffix's value into the insn. */
597 insn = (*operand->insert) (insn, operand,
598 mods, NULL, suffix->value,
601 insn |= suffix->value << operand->shift;
611 /* Wrong type. Just go on to try next insn entry. */
615 if (num_suffixes == MAX_SUFFIXES)
616 as_bad ("too many suffixes");
618 insn_suffixes[num_suffixes++] = suffix;
622 /* This is either a register or an expression of some kind. */
625 const struct arc_operand_value *reg = NULL;
629 if (operand->flags & ARC_OPERAND_SUFFIX)
632 /* Is there anything left to parse?
633 We don't check for this at the top because we want to parse
634 any trailing fake arguments in the syntax string. */
635 if (is_end_of_line[(unsigned char) *str])
638 /* Parse the operand. */
639 hold = input_line_pointer;
640 input_line_pointer = str;
642 str = input_line_pointer;
643 input_line_pointer = hold;
645 if (exp.X_op == O_illegal)
646 as_bad ("illegal operand");
647 else if (exp.X_op == O_absent)
648 as_bad ("missing operand");
649 else if (exp.X_op == O_constant)
651 value = exp.X_add_number;
653 else if (exp.X_op == O_register)
655 reg = (struct arc_operand_value *) exp.X_add_number;
657 #define IS_REG_DEST_OPERAND(o) ((o) == 'a')
658 else if (IS_REG_DEST_OPERAND (*syn))
659 as_bad ("symbol as destination register");
662 if (!strncmp (str, "@h30", 4))
664 arc_code_symbol (&exp);
667 /* We need to generate a fixup for this expression. */
668 if (fc >= MAX_FIXUPS)
669 as_fatal ("too many fixups");
670 fixups[fc].exp = exp;
671 /* We don't support shimm relocs. break here to force
672 the assembler to output a limm. */
673 #define IS_REG_SHIMM_OFFSET(o) ((o) == 'd')
674 if (IS_REG_SHIMM_OFFSET (*syn))
676 /* If this is a register constant (IE: one whose
677 register value gets stored as 61-63) then this
679 /* ??? This bit could use some cleaning up.
680 Referencing the format chars like this goes
682 if (IS_SYMBOL_OPERAND (*syn))
686 /* Save this, we don't yet know what reloc to use. */
688 /* Tell insert_reg we need a limm. This is
689 needed because the value at this point is
691 /* ??? We need a cleaner interface than this. */
692 (*arc_operands[arc_operand_map['Q']].insert)
693 (insn, operand, mods, reg, 0L, &junk);
696 fixups[fc].opindex = arc_operand_map[(int) *syn];
701 /* Insert the register or expression into the instruction. */
704 const char *errmsg = NULL;
705 insn = (*operand->insert) (insn, operand, mods,
706 reg, (long) value, &errmsg);
707 if (errmsg != (const char *) NULL)
709 last_errmsg = errmsg;
710 if (operand->flags & ARC_OPERAND_ERROR)
715 else if (operand->flags & ARC_OPERAND_WARN)
721 insn |= (value & ((1 << operand->bits) - 1)) << operand->shift;
727 /* If we're at the end of the syntax string, we're done. */
728 /* FIXME: try to move this to a separate function. */
735 /* For the moment we assume a valid `str' can only contain blanks
736 now. IE: We needn't try again with a longer version of the
737 insn and it is assumed that longer versions of insns appear
738 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
740 while (ISSPACE (*str))
743 if (!is_end_of_line[(unsigned char) *str])
744 as_bad ("junk at end of line: `%s'", str);
746 /* Is there a limm value? */
747 limm_p = arc_opcode_limm_p (&limm);
749 /* Perform various error and warning tests. */
752 static int in_delay_slot_p = 0;
753 static int prev_insn_needs_cc_nop_p = 0;
754 /* delay slot type seen */
755 int delay_slot_type = ARC_DELAY_NONE;
756 /* conditional execution flag seen */
758 /* 1 if condition codes are being set */
760 /* 1 if conditional branch, including `b' "branch always" */
761 int cond_branch_p = opcode->flags & ARC_OPCODE_COND_BRANCH;
763 for (i = 0; i < num_suffixes; ++i)
765 switch (arc_operands[insn_suffixes[i]->type].fmt)
768 delay_slot_type = insn_suffixes[i]->value;
771 conditional = insn_suffixes[i]->value;
779 /* Putting an insn with a limm value in a delay slot is supposed to
780 be legal, but let's warn the user anyway. Ditto for 8 byte
781 jumps with delay slots. */
782 if (in_delay_slot_p && limm_p)
783 as_warn ("8 byte instruction in delay slot");
784 if (delay_slot_type != ARC_DELAY_NONE
785 && limm_p && arc_insn_not_jl (insn)) /* except for jl addr */
786 as_warn ("8 byte jump instruction with delay slot");
787 in_delay_slot_p = (delay_slot_type != ARC_DELAY_NONE) && !limm_p;
789 /* Warn when a conditional branch immediately follows a set of
790 the condition codes. Note that this needn't be done if the
791 insn that sets the condition codes uses a limm. */
792 if (cond_branch_p && conditional != 0 /* 0 = "always" */
793 && prev_insn_needs_cc_nop_p && arc_mach_type == bfd_mach_arc_5)
794 as_warn ("conditional branch follows set of flags");
795 prev_insn_needs_cc_nop_p =
796 /* FIXME: ??? not required:
797 (delay_slot_type != ARC_DELAY_NONE) && */
801 /* Write out the instruction.
802 It is important to fetch enough space in one call to `frag_more'.
803 We use (f - frag_now->fr_literal) to compute where we are and we
804 don't want frag_now to change between calls. */
808 md_number_to_chars (f, insn, 4);
809 md_number_to_chars (f + 4, limm, 4);
810 dwarf2_emit_insn (8);
812 else if (limm_reloc_p)
814 /* We need a limm reloc, but the tables think we don't. */
820 md_number_to_chars (f, insn, 4);
821 dwarf2_emit_insn (4);
824 /* Create any fixups. */
825 for (i = 0; i < fc; ++i)
827 int op_type, reloc_type;
829 const struct arc_operand *operand;
831 /* Create a fixup for this operand.
832 At this point we do not use a bfd_reloc_code_real_type for
833 operands residing in the insn, but instead just use the
834 operand index. This lets us easily handle fixups for any
835 operand type, although that is admittedly not a very exciting
836 feature. We pick a BFD reloc type in md_apply_fix3.
838 Limm values (4 byte immediate "constants") must be treated
839 normally because they're not part of the actual insn word
840 and thus the insertion routines don't handle them. */
842 if (arc_operands[fixups[i].opindex].flags & ARC_OPERAND_LIMM)
844 /* Modify the fixup addend as required by the cpu. */
845 fixups[i].exp.X_add_number += arc_limm_fixup_adjust (insn);
846 op_type = fixups[i].opindex;
847 /* FIXME: can we add this data to the operand table? */
848 if (op_type == arc_operand_map['L']
849 || op_type == arc_operand_map['s']
850 || op_type == arc_operand_map['o']
851 || op_type == arc_operand_map['O'])
852 reloc_type = BFD_RELOC_32;
853 else if (op_type == arc_operand_map['J'])
854 reloc_type = BFD_RELOC_ARC_B26;
857 reloc_type = get_arc_exp_reloc_type (1, reloc_type,
863 op_type = get_arc_exp_reloc_type (0, fixups[i].opindex,
864 &fixups[i].exp, &exptmp);
865 reloc_type = op_type + (int) BFD_RELOC_UNUSED;
867 operand = &arc_operands[op_type];
868 fix_new_exp (frag_now,
869 ((f - frag_now->fr_literal)
870 + (operand->flags & ARC_OPERAND_LIMM ? 4 : 0)), 4,
872 (operand->flags & ARC_OPERAND_RELATIVE_BRANCH) != 0,
873 (bfd_reloc_code_real_type) reloc_type);
880 /* Try the next entry. */
883 if (NULL == last_errmsg)
884 as_bad ("bad instruction `%s'", start);
886 as_bad (last_errmsg);
890 arc_extoper (opertype)
899 struct arc_ext_operand_value *ext_oper;
905 name = input_line_pointer;
906 c = get_symbol_end ();
907 name = xstrdup (name);
910 ignore_rest_of_line ();
921 /* just after name is now '\0' */
922 p = input_line_pointer;
926 if (*input_line_pointer != ',')
928 as_bad ("expected comma after operand name");
929 ignore_rest_of_line ();
934 input_line_pointer++; /* skip ',' */
935 number = get_absolute_expression ();
939 as_bad ("negative operand number %d", number);
940 ignore_rest_of_line ();
949 if (*input_line_pointer != ',')
951 as_bad ("expected comma after register-number");
952 ignore_rest_of_line ();
957 input_line_pointer++; /* skip ',' */
958 mode = input_line_pointer;
960 if (!strncmp (mode, "r|w", 3))
963 input_line_pointer += 3;
967 if (!strncmp (mode, "r", 1))
969 imode = ARC_REGISTER_READONLY;
970 input_line_pointer += 1;
974 if (strncmp (mode, "w", 1))
976 as_bad ("invalid mode");
977 ignore_rest_of_line ();
983 imode = ARC_REGISTER_WRITEONLY;
984 input_line_pointer += 1;
991 if (*input_line_pointer != ',')
993 as_bad ("expected comma after register-mode");
994 ignore_rest_of_line ();
999 input_line_pointer++; /* skip ',' */
1001 if (!strncmp (input_line_pointer, "cannot_shortcut", 15))
1003 imode |= arc_get_noshortcut_flag ();
1004 input_line_pointer += 15;
1008 if (strncmp (input_line_pointer, "can_shortcut", 12))
1010 as_bad ("shortcut designator invalid");
1011 ignore_rest_of_line ();
1017 input_line_pointer += 12;
1023 if ((opertype == 1) && number > 60)
1025 as_bad ("core register value (%d) too large", number);
1026 ignore_rest_of_line ();
1031 if ((opertype == 0) && number > 31)
1033 as_bad ("condition code value (%d) too large", number);
1034 ignore_rest_of_line ();
1039 ext_oper = (struct arc_ext_operand_value *) \
1040 xmalloc (sizeof (struct arc_ext_operand_value));
1044 /* If the symbol already exists, point it at the new definition. */
1045 if ((symbolP = symbol_find (name)))
1047 if (S_GET_SEGMENT (symbolP) == reg_section)
1048 S_SET_VALUE (symbolP, (int) &ext_oper->operand);
1051 as_bad ("attempt to override symbol: %s", name);
1052 ignore_rest_of_line ();
1060 /* If its not there, add it. */
1061 symbol_table_insert (symbol_create (name, reg_section,
1062 (int) &ext_oper->operand, &zero_address_frag));
1066 ext_oper->operand.name = name;
1067 ext_oper->operand.value = number;
1068 ext_oper->operand.type = arc_operand_type (opertype);
1069 ext_oper->operand.flags = imode;
1071 ext_oper->next = arc_ext_operands;
1072 arc_ext_operands = ext_oper;
1074 /* OK, now that we know what this operand is, put a description in
1075 the arc extension section of the output file. */
1078 old_subsec = now_subseg;
1086 *p = 3 + strlen (name) + 1;
1091 p = frag_more (strlen (name) + 1);
1096 *p = 3 + strlen (name) + 1;
1098 *p = EXT_CORE_REGISTER;
1101 p = frag_more (strlen (name) + 1);
1106 *p = 6 + strlen (name) + 1;
1108 *p = EXT_AUX_REGISTER;
1110 *p = number >> 24 & 0xff;
1112 *p = number >> 16 & 0xff;
1114 *p = number >> 8 & 0xff;
1117 p = frag_more (strlen (name) + 1);
1121 as_bad ("invalid opertype");
1122 ignore_rest_of_line ();
1128 subseg_set (old_sec, old_subsec);
1130 /* Enter all registers into the symbol table. */
1132 demand_empty_rest_of_line ();
1136 arc_extinst (ignore)
1137 int ignore ATTRIBUTE_UNUSED;
1139 unsigned char syntax[129];
1143 int suffixcode = -1;
1144 int opcode, subopcode;
1148 struct arc_opcode *ext_op;
1153 name = input_line_pointer;
1154 c = get_symbol_end ();
1155 name = xstrdup (name);
1158 ignore_rest_of_line ();
1161 strcpy (syntax, name);
1162 name_len = strlen (name);
1164 /* just after name is now '\0' */
1165 p = input_line_pointer;
1170 if (*input_line_pointer != ',')
1172 as_bad ("expected comma after operand name");
1173 ignore_rest_of_line ();
1177 input_line_pointer++; /* skip ',' */
1178 opcode = get_absolute_expression ();
1182 if (*input_line_pointer != ',')
1184 as_bad ("expected comma after opcode");
1185 ignore_rest_of_line ();
1189 input_line_pointer++; /* skip ',' */
1190 subopcode = get_absolute_expression ();
1194 as_bad ("negative subopcode %d", subopcode);
1195 ignore_rest_of_line ();
1203 as_bad ("subcode value found when opcode not equal 0x03");
1204 ignore_rest_of_line ();
1209 if (subopcode < 0x09 || subopcode == 0x3f)
1211 as_bad ("invalid subopcode %d", subopcode);
1212 ignore_rest_of_line ();
1220 if (*input_line_pointer != ',')
1222 as_bad ("expected comma after subopcode");
1223 ignore_rest_of_line ();
1227 input_line_pointer++; /* skip ',' */
1229 for (i = 0; i < (int) MAXSUFFIXCLASS; i++)
1231 if (!strncmp (suffixclass[i].name,input_line_pointer, suffixclass[i].len))
1234 input_line_pointer += suffixclass[i].len;
1239 if (-1 == suffixcode)
1241 as_bad ("invalid suffix class");
1242 ignore_rest_of_line ();
1248 if (*input_line_pointer != ',')
1250 as_bad ("expected comma after suffix class");
1251 ignore_rest_of_line ();
1255 input_line_pointer++; /* skip ',' */
1257 for (i = 0; i < (int) MAXSYNTAXCLASS; i++)
1259 if (!strncmp (syntaxclass[i].name,input_line_pointer, syntaxclass[i].len))
1261 class = syntaxclass[i].class;
1262 input_line_pointer += syntaxclass[i].len;
1267 if (0 == (SYNTAX_VALID & class))
1269 as_bad ("invalid syntax class");
1270 ignore_rest_of_line ();
1274 if ((0x3 == opcode) & (class & SYNTAX_3OP))
1276 as_bad ("opcode 0x3 and SYNTAX_3OP invalid");
1277 ignore_rest_of_line ();
1284 strcat (syntax, "%.q%.f ");
1287 strcat (syntax, "%.f ");
1290 strcat (syntax, "%.q ");
1293 strcat (syntax, " ");
1296 as_bad ("unknown suffix class");
1297 ignore_rest_of_line ();
1302 strcat (syntax, ((opcode == 0x3) ? "%a,%b" : ((class & SYNTAX_3OP) ? "%a,%b,%c" : "%b,%c")));
1304 strcat (syntax, "%F");
1305 strcat (syntax, "%S%L");
1307 ext_op = (struct arc_opcode *) xmalloc (sizeof (struct arc_opcode));
1310 ignore_rest_of_line ();
1314 ext_op->syntax = xstrdup (syntax);
1315 if (NULL == ext_op->syntax)
1317 ignore_rest_of_line ();
1321 ext_op->mask = I (-1) | ((0x3 == opcode) ? C (-1) : 0);
1322 ext_op->value = I (opcode) | ((0x3 == opcode) ? C (subopcode) : 0);
1323 ext_op->flags = class;
1324 ext_op->next_asm = arc_ext_opcodes;
1325 ext_op->next_dis = arc_ext_opcodes;
1326 arc_ext_opcodes = ext_op;
1328 /* OK, now that we know what this inst is, put a description in the
1329 arc extension section of the output file. */
1332 old_subsec = now_subseg;
1337 *p = 5 + name_len + 1;
1339 *p = EXT_INSTRUCTION;
1345 *p = (class & (OP1_MUST_BE_IMM | OP1_IMM_IMPLIED) ? IGNORE_FIRST_OPD : 0);
1346 p = frag_more (name_len);
1347 strncpy (p, syntax, name_len);
1351 subseg_set (old_sec, old_subsec);
1353 demand_empty_rest_of_line ();
1359 if (!arcext_section)
1361 arcext_section = subseg_new (".arcextmap", 0);
1362 bfd_set_section_flags (stdoutput, arcext_section,
1363 SEC_READONLY | SEC_HAS_CONTENTS);
1366 subseg_set (arcext_section, 0);
1371 arc_common (localScope)
1380 name = input_line_pointer;
1381 c = get_symbol_end ();
1382 /* just after name is now '\0' */
1383 p = input_line_pointer;
1387 if (*input_line_pointer != ',')
1389 as_bad ("expected comma after symbol name");
1390 ignore_rest_of_line ();
1394 input_line_pointer++; /* skip ',' */
1395 size = get_absolute_expression ();
1399 as_bad ("negative symbol length");
1400 ignore_rest_of_line ();
1405 symbolP = symbol_find_or_make (name);
1408 if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP))
1410 as_bad ("ignoring attempt to re-define symbol");
1411 ignore_rest_of_line ();
1414 if (((int) S_GET_VALUE (symbolP) != 0) \
1415 && ((int) S_GET_VALUE (symbolP) != size))
1417 as_warn ("length of symbol \"%s\" already %ld, ignoring %d",
1418 S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP), size);
1420 assert (symbolP->sy_frag == &zero_address_frag);
1422 /* Now parse the alignment field. This field is optional for
1423 local and global symbols. Default alignment is zero. */
1424 if (*input_line_pointer == ',')
1426 input_line_pointer++;
1427 align = get_absolute_expression ();
1431 as_warn ("assuming symbol alignment of zero");
1437 if (localScope != 0)
1444 old_subsec = now_subseg;
1445 record_alignment (bss_section, align);
1446 subseg_set (bss_section, 0); /* ??? subseg_set (bss_section, 1); ??? */
1450 frag_align (align, 0, 0);
1452 /* Detach from old frag. */
1453 if (S_GET_SEGMENT (symbolP) == bss_section)
1454 symbolP->sy_frag->fr_symbol = NULL;
1456 symbolP->sy_frag = frag_now;
1457 pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP,
1458 (offsetT) size, (char *) 0);
1461 S_SET_SIZE (symbolP, size);
1462 S_SET_SEGMENT (symbolP, bss_section);
1463 S_CLEAR_EXTERNAL (symbolP);
1465 subseg_set (old_sec, old_subsec);
1469 S_SET_VALUE (symbolP, (valueT) size);
1470 S_SET_ALIGN (symbolP, align);
1471 S_SET_EXTERNAL (symbolP);
1472 S_SET_SEGMENT (symbolP, bfd_com_section_ptr);
1475 symbolP->bsym->flags |= BSF_OBJECT;
1477 demand_empty_rest_of_line ();
1481 /* Select the cpu we're assembling for. */
1485 int ignore ATTRIBUTE_UNUSED;
1491 cpu = input_line_pointer;
1492 c = get_symbol_end ();
1493 mach = arc_get_mach (cpu);
1494 *input_line_pointer = c;
1496 /* If an instruction has already been seen, it's too late. */
1497 if (cpu_tables_init_p)
1499 as_bad ("\".option\" directive must appear before any instructions");
1500 ignore_rest_of_line ();
1507 if (mach_type_specified_p && mach != arc_mach_type)
1509 as_bad ("\".option\" directive conflicts with initial definition");
1510 ignore_rest_of_line ();
1515 /* The cpu may have been selected on the command line. */
1516 if (mach != arc_mach_type)
1517 as_warn ("\".option\" directive overrides command-line (default) value");
1518 arc_mach_type = mach;
1519 if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, mach))
1520 as_fatal ("could not set architecture and machine");
1521 mach_type_specified_p = 1;
1523 demand_empty_rest_of_line ();
1527 as_bad ("invalid identifier for \".option\"");
1528 ignore_rest_of_line ();
1531 /* Turn a string in input_line_pointer into a floating point constant
1532 of type TYPE, and store the appropriate bytes in *LITP. The number
1533 of LITTLENUMS emitted is stored in *SIZEP. An error message is
1534 returned, or NULL on OK. */
1536 /* Equal to MAX_PRECISION in atof-ieee.c */
1537 #define MAX_LITTLENUMS 6
1540 md_atof (type, litP, sizeP)
1546 LITTLENUM_TYPE words[MAX_LITTLENUMS];
1547 LITTLENUM_TYPE *wordP;
1549 char * atof_ieee PARAMS ((char *, int, LITTLENUM_TYPE *));
1565 return "bad call to md_atof";
1568 t = atof_ieee (input_line_pointer, type, words);
1570 input_line_pointer = t;
1571 *sizeP = prec * sizeof (LITTLENUM_TYPE);
1572 for (wordP = words; prec--;)
1574 md_number_to_chars (litP, (valueT) (*wordP++), sizeof (LITTLENUM_TYPE));
1575 litP += sizeof (LITTLENUM_TYPE);
1581 /* Write a value out to the object file, using the appropriate
1585 md_number_to_chars (buf, val, n)
1590 if (target_big_endian)
1591 number_to_chars_bigendian (buf, val, n);
1593 number_to_chars_littleendian (buf, val, n);
1596 /* Round up a section size to the appropriate boundary. */
1599 md_section_align (segment, size)
1603 int align = bfd_get_section_alignment (stdoutput, segment);
1605 return ((size + (1 << align) - 1) & (-1 << align));
1608 /* We don't have any form of relaxing. */
1611 md_estimate_size_before_relax (fragp, seg)
1612 fragS *fragp ATTRIBUTE_UNUSED;
1613 asection *seg ATTRIBUTE_UNUSED;
1615 as_fatal (_("md_estimate_size_before_relax\n"));
1619 /* Convert a machine dependent frag. We never generate these. */
1622 md_convert_frag (abfd, sec, fragp)
1623 bfd *abfd ATTRIBUTE_UNUSED;
1624 asection *sec ATTRIBUTE_UNUSED;
1625 fragS *fragp ATTRIBUTE_UNUSED;
1627 as_fatal (_("md_convert_frag\n"));
1631 arc_code_symbol (expressionP)
1632 expressionS *expressionP;
1634 if (expressionP->X_op == O_symbol && expressionP->X_add_number == 0)
1637 expressionP->X_op = O_right_shift;
1638 expressionP->X_add_symbol->sy_value.X_op = O_constant;
1639 two.X_op = O_constant;
1640 two.X_add_symbol = two.X_op_symbol = NULL;
1641 two.X_add_number = 2;
1642 expressionP->X_op_symbol = make_expr_symbol (&two);
1644 /* Allow %st(sym1-sym2) */
1645 else if (expressionP->X_op == O_subtract
1646 && expressionP->X_add_symbol != NULL
1647 && expressionP->X_op_symbol != NULL
1648 && expressionP->X_add_number == 0)
1651 expressionP->X_add_symbol = make_expr_symbol (expressionP);
1652 expressionP->X_op = O_right_shift;
1653 two.X_op = O_constant;
1654 two.X_add_symbol = two.X_op_symbol = NULL;
1655 two.X_add_number = 2;
1656 expressionP->X_op_symbol = make_expr_symbol (&two);
1660 as_bad ("expression too complex code symbol");
1665 /* Parse an operand that is machine-specific.
1667 The ARC has a special %-op to adjust addresses so they're usable in
1668 branches. The "st" is short for the STatus register.
1669 ??? Later expand this to take a flags value too.
1671 ??? We can't create new expression types so we map the %-op's onto the
1672 existing syntax. This means that the user could use the chosen syntax
1673 to achieve the same effect. */
1676 md_operand (expressionP)
1677 expressionS *expressionP;
1679 char *p = input_line_pointer;
1682 if (strncmp (p, "%st(", 4) == 0)
1684 input_line_pointer += 4;
1685 expression (expressionP);
1686 if (*input_line_pointer != ')')
1688 as_bad ("missing ')' in %%-op");
1691 ++input_line_pointer;
1692 arc_code_symbol (expressionP);
1696 /* It could be a register. */
1698 struct arc_ext_operand_value *ext_oper = arc_ext_operands;
1703 l = strlen (ext_oper->operand.name);
1704 if (!strncmp (p, ext_oper->operand.name, l) && !ISALNUM (*(p + l)))
1706 input_line_pointer += l + 1;
1707 expressionP->X_op = O_register;
1708 expressionP->X_add_number = (int) &ext_oper->operand;
1711 ext_oper = ext_oper->next;
1713 for (i = 0; i < arc_reg_names_count; i++)
1715 l = strlen (arc_reg_names[i].name);
1716 if (!strncmp (p, arc_reg_names[i].name, l) && !ISALNUM (*(p + l)))
1718 input_line_pointer += l + 1;
1719 expressionP->X_op = O_register;
1720 expressionP->X_add_number = (int) &arc_reg_names[i];
1727 /* We have no need to default values of symbols.
1728 We could catch register names here, but that is handled by inserting
1729 them all in the symbol table to begin with. */
1732 md_undefined_symbol (name)
1733 char *name ATTRIBUTE_UNUSED;
1738 /* Functions concerning expressions. */
1740 /* Parse a .byte, .word, etc. expression.
1742 Values for the status register are specified with %st(label).
1743 `label' will be right shifted by 2. */
1746 arc_parse_cons_expression (exp, nbytes)
1748 unsigned int nbytes ATTRIBUTE_UNUSED;
1750 char *p = input_line_pointer;
1751 int code_symbol_fix = 0;
1753 for (; ! is_end_of_line[(unsigned char) *p]; p++)
1754 if (*p == '@' && !strncmp (p, "@h30", 4))
1756 code_symbol_fix = 1;
1760 if (code_symbol_fix)
1762 arc_code_symbol (exp);
1763 input_line_pointer = p;
1767 /* Record a fixup for a cons expression. */
1770 arc_cons_fix_new (frag, where, nbytes, exp)
1781 /* This may be a special ARC reloc (eg: %st()). */
1782 reloc_type = get_arc_exp_reloc_type (1, BFD_RELOC_32, exp, &exptmp);
1783 fix_new_exp (frag, where, nbytes, &exptmp, 0, reloc_type);
1787 fix_new_exp (frag, where, nbytes, exp, 0,
1788 nbytes == 2 ? BFD_RELOC_16
1789 : nbytes == 8 ? BFD_RELOC_64
1794 /* Functions concerning relocs. */
1796 /* The location from which a PC relative jump should be calculated,
1797 given a PC relative reloc. */
1800 md_pcrel_from (fixP)
1803 /* Return the address of the delay slot. */
1804 return fixP->fx_frag->fr_address + fixP->fx_where + fixP->fx_size;
1807 /* Compute the reloc type of an expression.
1808 The possibly modified expression is stored in EXPNEW.
1810 This is used to convert the expressions generated by the %-op's into
1811 the appropriate operand type. It is called for both data in instructions
1812 (operands) and data outside instructions (variables, debugging info, etc.).
1814 Currently supported %-ops:
1816 %st(symbol): represented as "symbol >> 2"
1817 "st" is short for STatus as in the status register (pc)
1819 DEFAULT_TYPE is the type to use if no special processing is required.
1821 DATA_P is non-zero for data or limm values, zero for insn operands.
1822 Remember that the opcode "insertion fns" cannot be used on data, they're
1823 only for inserting operands into insns. They also can't be used for limm
1824 values as the insertion routines don't handle limm values. When called for
1825 insns we return fudged reloc types (real_value - BFD_RELOC_UNUSED). When
1826 called for data or limm values we use real reloc types. */
1829 get_arc_exp_reloc_type (data_p, default_type, exp, expnew)
1833 expressionS *expnew;
1835 /* If the expression is "symbol >> 2" we must change it to just "symbol",
1836 as fix_new_exp can't handle it. Similarily for (symbol - symbol) >> 2.
1837 That's ok though. What's really going on here is that we're using
1838 ">> 2" as a special syntax for specifying BFD_RELOC_ARC_B26. */
1840 if (exp->X_op == O_right_shift
1841 && exp->X_op_symbol != NULL
1842 && exp->X_op_symbol->sy_value.X_op == O_constant
1843 && exp->X_op_symbol->sy_value.X_add_number == 2
1844 && exp->X_add_number == 0)
1846 if (exp->X_add_symbol != NULL
1847 && (exp->X_add_symbol->sy_value.X_op == O_constant
1848 || exp->X_add_symbol->sy_value.X_op == O_symbol))
1851 expnew->X_op = O_symbol;
1852 expnew->X_op_symbol = NULL;
1853 return data_p ? BFD_RELOC_ARC_B26 : arc_operand_map['J'];
1855 else if (exp->X_add_symbol != NULL
1856 && exp->X_add_symbol->sy_value.X_op == O_subtract)
1858 *expnew = exp->X_add_symbol->sy_value;
1859 return data_p ? BFD_RELOC_ARC_B26 : arc_operand_map['J'];
1864 return default_type;
1867 /* Apply a fixup to the object code. This is called for all the
1868 fixups we generated by the call to fix_new_exp, above. In the call
1869 above we used a reloc code which was the largest legal reloc code
1870 plus the operand index. Here we undo that to recover the operand
1871 index. At this point all symbol values should be fully resolved,
1872 and we attempt to completely resolve the reloc. If we can not do
1873 that, we determine the correct reloc code and put it back in the fixup. */
1876 md_apply_fix3 (fixP, valP, seg)
1882 char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
1884 valueT value = * valP;
1886 if (fixP->fx_addsy == (symbolS *) NULL)
1889 else if (fixP->fx_pcrel)
1891 /* Hack around bfd_install_relocation brain damage. */
1892 if (S_GET_SEGMENT (fixP->fx_addsy) != seg)
1893 value += md_pcrel_from (fixP);
1896 /* We can't actually support subtracting a symbol. */
1897 if (fixP->fx_subsy != NULL)
1898 as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex"));
1900 if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED)
1903 const struct arc_operand *operand;
1907 opindex = (int) fixP->fx_r_type - (int) BFD_RELOC_UNUSED;
1909 operand = &arc_operands[opindex];
1911 /* Fetch the instruction, insert the fully resolved operand
1912 value, and stuff the instruction back again. */
1913 where = fixP->fx_frag->fr_literal + fixP->fx_where;
1914 if (target_big_endian)
1915 insn = bfd_getb32 ((unsigned char *) where);
1917 insn = bfd_getl32 ((unsigned char *) where);
1918 insn = arc_insert_operand (insn, operand, -1, NULL, (offsetT) value,
1919 fixP->fx_file, fixP->fx_line);
1920 if (target_big_endian)
1921 bfd_putb32 ((bfd_vma) insn, (unsigned char *) where);
1923 bfd_putl32 ((bfd_vma) insn, (unsigned char *) where);
1927 /* Nothing else to do here. */
1931 /* Determine a BFD reloc value based on the operand information.
1932 We are only prepared to turn a few of the operands into relocs.
1933 !!! Note that we can't handle limm values here. Since we're using
1934 implicit addends the addend must be inserted into the instruction,
1935 however, the opcode insertion routines currently do nothing with
1937 if (operand->fmt == 'B')
1939 assert ((operand->flags & ARC_OPERAND_RELATIVE_BRANCH) != 0
1940 && operand->bits == 20
1941 && operand->shift == 7);
1942 fixP->fx_r_type = BFD_RELOC_ARC_B22_PCREL;
1944 else if (operand->fmt == 'J')
1946 assert ((operand->flags & ARC_OPERAND_ABSOLUTE_BRANCH) != 0
1947 && operand->bits == 24
1948 && operand->shift == 32);
1949 fixP->fx_r_type = BFD_RELOC_ARC_B26;
1951 else if (operand->fmt == 'L')
1953 assert ((operand->flags & ARC_OPERAND_LIMM) != 0
1954 && operand->bits == 32
1955 && operand->shift == 32);
1956 fixP->fx_r_type = BFD_RELOC_32;
1960 as_bad_where (fixP->fx_file, fixP->fx_line,
1961 "unresolved expression that must be resolved");
1968 switch (fixP->fx_r_type)
1971 md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
1975 md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
1979 md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
1984 md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
1988 case BFD_RELOC_ARC_B26:
1989 /* If !fixP->fx_done then `value' is an implicit addend.
1990 We must shift it right by 2 in this case as well because the
1991 linker performs the relocation and then adds this in (as opposed
1992 to adding this in and then shifting right by 2). */
1994 md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
2003 /* Translate internal representation of relocation info to BFD target
2007 tc_gen_reloc (section, fixP)
2008 asection *section ATTRIBUTE_UNUSED;
2013 reloc = (arelent *) xmalloc (sizeof (arelent));
2015 reloc->sym_ptr_ptr = &fixP->fx_addsy->bsym;
2016 reloc->address = fixP->fx_frag->fr_address + fixP->fx_where;
2017 reloc->howto = bfd_reloc_type_lookup (stdoutput, fixP->fx_r_type);
2018 if (reloc->howto == (reloc_howto_type *) NULL)
2020 as_bad_where (fixP->fx_file, fixP->fx_line,
2021 "internal error: can't export reloc type %d (`%s')",
2023 bfd_get_reloc_code_name (fixP->fx_r_type));
2027 assert (!fixP->fx_pcrel == !reloc->howto->pc_relative);
2029 /* Set addend to account for PC being advanced one insn before the
2030 target address is computed. */
2032 reloc->addend = (fixP->fx_pcrel ? -4 : 0);