1 /* tc-m32r.c -- Assembler for the Mitsubishi M32R.
2 Copyright (C) 1996, 1997, 1998 Free Software Foundation.
4 This file is part of GAS, the GNU Assembler.
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GAS is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GAS; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
29 /* Linked list of symbols that are debugging symbols to be defined as the
30 beginning of the current instruction. */
31 typedef struct sym_link
33 struct sym_link *next;
37 static sym_linkS *debug_sym_link = (sym_linkS *)0;
39 /* Structure to hold all of the different components describing
40 an individual instruction. */
43 const CGEN_INSN * insn;
44 const CGEN_INSN * orig_insn;
47 CGEN_INSN_INT buffer [1];
48 #define INSN_VALUE(buf) (*(buf))
50 unsigned char buffer [CGEN_MAX_INSN_SIZE];
51 #define INSN_VALUE(buf) (buf)
56 fixS * fixups [GAS_CGEN_MAX_FIXUPS];
57 int indices [MAX_OPERAND_INSTANCES];
58 sym_linkS *debug_sym_link;
62 /* prev_insn.insn is non-null if last insn was a 16 bit insn on a 32 bit
63 boundary (i.e. was the first of two 16 bit insns). */
64 static m32r_insn prev_insn;
66 /* Non-zero if we've seen a relaxable insn since the last 32 bit
68 static int seen_relaxable_p = 0;
70 /* Non-zero if -relax specified, in which case sufficient relocs are output
71 for the linker to do relaxing.
72 We do simple forms of relaxing internally, but they are always done.
73 This flag does not apply to them. */
74 static int m32r_relax;
76 #if 0 /* not supported yet */
77 /* If non-NULL, pointer to cpu description file to read.
78 This allows runtime additions to the assembler. */
79 static const char * m32r_cpu_desc;
82 /* Non-zero if warn when a high/shigh reloc has no matching low reloc.
83 Each high/shigh reloc must be paired with it's low cousin in order to
84 properly calculate the addend in a relocatable link (since there is a
85 potential carry from the low to the high/shigh).
86 This option is off by default though for user-written assembler code it
87 might make sense to make the default be on (i.e. have gcc pass a flag
88 to turn it off). This warning must not be on for GCC created code as
89 optimization may delete the low but not the high/shigh (at least we
90 shouldn't assume or require it to). */
91 static int warn_unmatched_high = 0;
93 /* start-sanitize-m32rx */
94 /* Non-zero if -m32rx has been specified, in which case support for the
95 extended M32RX instruction set should be enabled. */
96 static int enable_m32rx = 0;
98 /* Non-zero if -m32rx -hidden has been specified, in which case support for
99 the special M32RX instruction set should be enabled. */
100 static int enable_special = 0;
102 /* Non-zero if the programmer should be warned when an explicit parallel
103 instruction might have constraint violations. */
104 static int warn_explicit_parallel_conflicts = 1;
106 /* Non-zero if insns can be made parallel. */
108 /* end-sanitize-m32rx */
110 /* stuff for .scomm symbols. */
111 static segT sbss_section;
112 static asection scom_section;
113 static asymbol scom_symbol;
115 const char comment_chars[] = ";";
116 const char line_comment_chars[] = "#";
117 const char line_separator_chars[] = "";
118 const char EXP_CHARS[] = "eE";
119 const char FLT_CHARS[] = "dD";
121 /* Relocations against symbols are done in two
122 parts, with a HI relocation and a LO relocation. Each relocation
123 has only 16 bits of space to store an addend. This means that in
124 order for the linker to handle carries correctly, it must be able
125 to locate both the HI and the LO relocation. This means that the
126 relocations must appear in order in the relocation table.
128 In order to implement this, we keep track of each unmatched HI
129 relocation. We then sort them so that they immediately precede the
130 corresponding LO relocation. */
134 struct m32r_hi_fixup * next; /* Next HI fixup. */
135 fixS * fixp; /* This fixup. */
136 segT seg; /* The section this fixup is in. */
140 /* The list of unmatched HI relocs. */
142 static struct m32r_hi_fixup * m32r_hi_fixup_list;
145 /* start-sanitize-m32rx */
152 if (stdoutput != NULL)
153 bfd_set_arch_mach (stdoutput, TARGET_ARCH,
154 enable_m32rx ? bfd_mach_m32rx : bfd_mach_m32r);
156 /* end-sanitize-m32rx */
158 #define M32R_SHORTOPTS ""
159 /* start-sanitize-m32rx */
160 #undef M32R_SHORTOPTS
161 #define M32R_SHORTOPTS "O"
162 /* end-sanitize-m32rx */
163 const char * md_shortopts = M32R_SHORTOPTS;
165 struct option md_longopts[] =
167 /* start-sanitize-m32rx */
168 #define OPTION_M32RX (OPTION_MD_BASE)
169 {"m32rx", no_argument, NULL, OPTION_M32RX},
170 #define OPTION_WARN_PARALLEL (OPTION_MD_BASE + 1)
171 {"warn-explicit-parallel-conflicts", no_argument, NULL, OPTION_WARN_PARALLEL},
172 {"Wp", no_argument, NULL, OPTION_WARN_PARALLEL},
173 #define OPTION_NO_WARN_PARALLEL (OPTION_MD_BASE + 2)
174 {"no-warn-explicit-parallel-conflicts", no_argument, NULL, OPTION_NO_WARN_PARALLEL},
175 {"Wnp", no_argument, NULL, OPTION_NO_WARN_PARALLEL},
176 #define OPTION_SPECIAL (OPTION_MD_BASE + 3)
177 {"hidden", no_argument, NULL, OPTION_SPECIAL},
178 /* end-sanitize-m32rx */
180 /* Sigh. I guess all warnings must now have both variants. */
181 #define OPTION_WARN_UNMATCHED (OPTION_MD_BASE + 4)
182 {"warn-unmatched-high", OPTION_WARN_UNMATCHED},
183 {"Wuh", OPTION_WARN_UNMATCHED},
184 #define OPTION_NO_WARN_UNMATCHED (OPTION_MD_BASE + 5)
185 {"no-warn-unmatched-high", OPTION_WARN_UNMATCHED},
186 {"Wnuh", OPTION_WARN_UNMATCHED},
188 #if 0 /* not supported yet */
189 #define OPTION_RELAX (OPTION_MD_BASE + 6)
190 {"relax", no_argument, NULL, OPTION_RELAX},
191 #define OPTION_CPU_DESC (OPTION_MD_BASE + 7)
192 {"cpu-desc", required_argument, NULL, OPTION_CPU_DESC},
195 {NULL, no_argument, NULL, 0}
197 size_t md_longopts_size = sizeof (md_longopts);
200 md_parse_option (c, arg)
206 /* start-sanitize-m32rx */
215 case OPTION_WARN_PARALLEL:
216 warn_explicit_parallel_conflicts = 1;
219 case OPTION_NO_WARN_PARALLEL:
220 warn_explicit_parallel_conflicts = 0;
228 extern char * myname;
230 /* Pretend that we do not recognise this option. */
231 fprintf (stderr, _("%s: unrecognised option: -hidden\n"), myname);
235 /* end-sanitize-m32rx */
237 case OPTION_WARN_UNMATCHED:
238 warn_unmatched_high = 1;
241 case OPTION_NO_WARN_UNMATCHED:
242 warn_unmatched_high = 0;
245 #if 0 /* not supported yet */
249 case OPTION_CPU_DESC:
261 md_show_usage (stream)
264 fprintf (stream, _(" M32R specific command line options:\n"));
266 /* start-sanitize-m32rx */
267 fprintf (stream, _("\
268 -m32rx support the extended m32rx instruction set\n"));
269 fprintf (stream, _("\
270 -O try to combine instructions in parallel\n"));
272 fprintf (stream, _("\
273 -warn-explicit-parallel-conflicts warn when parallel instructions\n"));
274 fprintf (stream, _("\
275 violate contraints\n"));
276 fprintf (stream, _("\
277 -no-warn-explicit-parallel-conflicts do not warn when parallel\n"));
278 fprintf (stream, _("\
279 instructions violate contraints\n"));
280 fprintf (stream, _("\
281 -Wp synonym for -warn-explicit-parallel-conflicts\n"));
282 fprintf (stream, _("\
283 -Wnp synonym for -no-warn-explicit-parallel-conflicts\n"));
284 /* end-sanitize-m32rx */
286 fprintf (stream, _("\
287 -warn-unmatched-high warn when an (s)high reloc has no matching low reloc\n"));
288 fprintf (stream, _("\
289 -no-warn-unmatched-high do not warn about missing low relocs\n"));
290 fprintf (stream, _("\
291 -Wuh synonym for -warn-unmatched-high\n"));
292 fprintf (stream, _("\
293 -Wnuh synonym for -no-warn-unmatched-high\n"));
296 fprintf (stream, _("\
297 -relax create linker relaxable code\n"));
298 fprintf (stream, _("\
299 -cpu-desc provide runtime cpu description file\n"));
303 static void fill_insn PARAMS ((int));
304 static void m32r_scomm PARAMS ((int));
305 static void debug_sym PARAMS ((int));
306 static void expand_debug_syms PARAMS ((sym_linkS *, int));
308 /* Set by md_assemble for use by m32r_fill_insn. */
309 static subsegT prev_subseg;
310 static segT prev_seg;
312 /* The target specific pseudo-ops which we support. */
313 const pseudo_typeS md_pseudo_table[] =
316 { "fillinsn", fill_insn, 0 },
317 { "scomm", m32r_scomm, 0 },
318 { "debugsym", debug_sym, 0 },
319 /* start-sanitize-m32rx */
320 /* Not documented as so far there is no need for them.... */
321 { "m32r", allow_m32rx, 0 },
322 { "m32rx", allow_m32rx, 1 },
323 /* end-sanitize-m32rx */
327 /* FIXME: Should be machine generated. */
328 #define NOP_INSN 0x7000
329 #define PAR_NOP_INSN 0xf000 /* can only be used in 2nd slot */
331 /* When we align the .text section, insert the correct NOP pattern.
332 N is the power of 2 alignment. LEN is the length of pattern FILL.
333 MAX is the maximum number of characters to skip when doing the alignment,
334 or 0 if there is no maximum. */
337 m32r_do_align (n, fill, len, max)
343 /* Only do this if the fill pattern wasn't specified. */
345 && (now_seg->flags & SEC_CODE) != 0
346 /* Only do this special handling if aligning to at least a
349 /* Only do this special handling if we're allowed to emit at
351 && (max == 0 || max > 1))
353 static const unsigned char nop_pattern[] = { 0xf0, 0x00 };
356 /* First align to a 2 byte boundary, in case there is an odd .byte. */
357 /* FIXME: How much memory will cause gas to use when assembling a big
358 program? Perhaps we can avoid the frag_align call? */
359 frag_align (1, 0, 0);
361 /* Next align to a 4 byte boundary (we know n >= 2) using a parallel
363 frag_align_pattern (2, nop_pattern, sizeof nop_pattern, 0);
364 /* If doing larger alignments use a repeating sequence of appropriate
368 static const unsigned char multi_nop_pattern[] =
369 { 0x70, 0x00, 0xf0, 0x00 };
370 frag_align_pattern (n, multi_nop_pattern, sizeof multi_nop_pattern,
374 prev_insn.insn = NULL;
381 /* If the last instruction was the first of 2 16 bit insns,
382 output a nop to move the PC to a 32 bit boundary.
384 This is done via an alignment specification since branch relaxing
385 may make it unnecessary.
387 Internally, we need to output one of these each time a 32 bit insn is
388 seen after an insn that is relaxable. */
394 (void) m32r_do_align (2, NULL, 0, 0);
395 prev_insn.insn = NULL;
396 seen_relaxable_p = 0;
399 /* Record the symbol so that when we output the insn, we can create
400 a symbol that is at the start of the instruction. This is used
401 to emit the label for the start of a breakpoint without causing
402 the assembler to emit a NOP if the previous instruction was a
403 16 bit instruction. */
411 register char *end_name;
412 register symbolS *symbolP;
413 register sym_linkS *link;
415 name = input_line_pointer;
416 delim = get_symbol_end ();
417 end_name = input_line_pointer;
419 if ((symbolP = symbol_find (name)) == NULL
420 && (symbolP = md_undefined_symbol (name)) == NULL)
422 symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag);
425 symbol_table_insert (symbolP);
426 if (S_IS_DEFINED (symbolP) && S_GET_SEGMENT (symbolP) != reg_section)
427 /* xgettext:c-format */
428 as_bad (_("symbol `%s' already defined"), S_GET_NAME (symbolP));
432 link = (sym_linkS *) xmalloc (sizeof (sym_linkS));
433 link->symbol = symbolP;
434 link->next = debug_sym_link;
435 debug_sym_link = link;
440 demand_empty_rest_of_line ();
443 /* Second pass to expanding the debug symbols, go through linked
444 list of symbols and reassign the address. */
447 expand_debug_syms (syms, align)
451 char *save_input_line = input_line_pointer;
452 sym_linkS *next_syms;
457 (void) m32r_do_align (align, NULL, 0, 0);
458 for (; syms != (sym_linkS *)0; syms = next_syms)
460 symbolS *symbolP = syms->symbol;
461 next_syms = syms->next;
462 input_line_pointer = ".\n";
463 pseudo_set (symbolP);
467 input_line_pointer = save_input_line;
470 /* Cover function to fill_insn called after a label and at end of assembly.
471 The result is always 1: we're called in a conditional to see if the
472 current line is a label. */
475 m32r_fill_insn (done)
478 if (prev_seg != NULL)
481 subsegT subseg = now_subseg;
483 subseg_set (prev_seg, prev_subseg);
487 subseg_set (seg, subseg);
490 if (done && debug_sym_link)
492 expand_debug_syms (debug_sym_link, 1);
493 debug_sym_link = (sym_linkS *)0;
506 /* Initialize the `cgen' interface. */
508 /* Set the machine number and endian. */
509 gas_cgen_opcode_desc = m32r_cgen_opcode_open (0 /* mach number */,
512 : CGEN_ENDIAN_LITTLE);
513 m32r_cgen_init_asm (gas_cgen_opcode_desc);
515 /* This is a callback from cgen to gas to parse operands. */
516 cgen_set_parse_operand_fn (gas_cgen_opcode_desc, gas_cgen_parse_operand);
518 #if 0 /* not supported yet */
519 /* If a runtime cpu description file was provided, parse it. */
520 if (m32r_cpu_desc != NULL)
524 errmsg = cgen_read_cpu_file (gas_cgen_opcode_desc, m32r_cpu_desc);
526 as_bad ("%s: %s", m32r_cpu_desc, errmsg);
530 /* Save the current subseg so we can restore it [it's the default one and
531 we don't want the initial section to be .sbss]. */
535 /* The sbss section is for local .scomm symbols. */
536 sbss_section = subseg_new (".sbss", 0);
538 /* This is copied from perform_an_assembly_pass. */
539 applicable = bfd_applicable_section_flags (stdoutput);
540 bfd_set_section_flags (stdoutput, sbss_section, applicable & SEC_ALLOC);
542 #if 0 /* What does this do? [see perform_an_assembly_pass] */
543 seg_info (bss_section)->bss = 1;
546 subseg_set (seg, subseg);
548 /* We must construct a fake section similar to bfd_com_section
549 but with the name .scommon. */
550 scom_section = bfd_com_section;
551 scom_section.name = ".scommon";
552 scom_section.output_section = & scom_section;
553 scom_section.symbol = & scom_symbol;
554 scom_section.symbol_ptr_ptr = & scom_section.symbol;
555 scom_symbol = * bfd_com_section.symbol;
556 scom_symbol.name = ".scommon";
557 scom_symbol.section = & scom_section;
559 /* start-sanitize-m32rx */
560 allow_m32rx (enable_m32rx);
561 /* end-sanitize-m32rx */
564 /* start-sanitize-m32rx */
566 #define OPERAND_IS_COND_BIT(operand, indices, index) \
567 (CGEN_OPERAND_INSTANCE_HW (operand)->type == HW_H_COND \
568 || (CGEN_OPERAND_INSTANCE_HW (operand)->type == HW_H_CR \
569 && (indices [index] == 0 || indices [index] == 1)))
571 /* Returns true if an output of instruction 'a' is referenced by an operand
572 of instruction 'b'. If 'check_outputs' is true then b's outputs are
573 checked, otherwise its inputs are examined. */
576 first_writes_to_seconds_operands (a, b, check_outputs)
579 const int check_outputs;
581 const CGEN_OPERAND_INSTANCE * a_operands = CGEN_INSN_OPERANDS (a->insn);
582 const CGEN_OPERAND_INSTANCE * b_ops = CGEN_INSN_OPERANDS (b->insn);
585 /* If at least one of the instructions takes no operands, then there is
586 nothing to check. There really are instructions without operands,
588 if (a_operands == NULL || b_ops == NULL)
591 /* Scan the operand list of 'a' looking for an output operand. */
593 CGEN_OPERAND_INSTANCE_TYPE (a_operands) != CGEN_OPERAND_INSTANCE_END;
594 a_index ++, a_operands ++)
596 if (CGEN_OPERAND_INSTANCE_TYPE (a_operands) == CGEN_OPERAND_INSTANCE_OUTPUT)
599 const CGEN_OPERAND_INSTANCE * b_operands = b_ops;
602 The Condition bit 'C' is a shadow of the CBR register (control
603 register 1) and also a shadow of bit 31 of the program status
604 word (control register 0). For now this is handled here, rather
607 if (OPERAND_IS_COND_BIT (a_operands, a->indices, a_index))
609 /* Scan operand list of 'b' looking for another reference to the
610 condition bit, which goes in the right direction. */
612 CGEN_OPERAND_INSTANCE_TYPE (b_operands) != CGEN_OPERAND_INSTANCE_END;
613 b_index ++, b_operands ++)
615 if ((CGEN_OPERAND_INSTANCE_TYPE (b_operands) ==
616 (check_outputs ? CGEN_OPERAND_INSTANCE_OUTPUT : CGEN_OPERAND_INSTANCE_INPUT))
617 && OPERAND_IS_COND_BIT (b_operands, b->indices, b_index))
623 /* Scan operand list of 'b' looking for an operand that
624 references the same hardware element, and which goes in the
627 CGEN_OPERAND_INSTANCE_TYPE (b_operands) != CGEN_OPERAND_INSTANCE_END;
628 b_index ++, b_operands ++)
630 if ((CGEN_OPERAND_INSTANCE_TYPE (b_operands) ==
631 (check_outputs ? CGEN_OPERAND_INSTANCE_OUTPUT : CGEN_OPERAND_INSTANCE_INPUT))
632 && (CGEN_OPERAND_INSTANCE_HW (b_operands) == CGEN_OPERAND_INSTANCE_HW (a_operands))
633 && (a->indices [a_index] == b->indices [b_index]))
643 /* Returns true if the insn can (potentially) alter the program counter. */
649 #if 0 /* Once PC operands are working.... */
650 const CGEN_OPERAND_INSTANCE * a_operands == CGEN_INSN_OPERANDS (a->insn);
652 if (a_operands == NULL)
655 while (CGEN_OPERAND_INSTANCE_TYPE (a_operands) != CGEN_OPERAND_INSTANCE_END)
657 if (CGEN_OPERAND_INSTANCE_OPERAND (a_operands) != NULL
658 && CGEN_OPERAND_INDEX (CGEN_OPERAND_INSTANCE_OPERAND (a_operands)) == M32R_OPERAND_PC)
664 if (CGEN_INSN_ATTR (a->insn, CGEN_INSN_UNCOND_CTI)
665 || CGEN_INSN_ATTR (a->insn, CGEN_INSN_COND_CTI))
671 /* Returns NULL if the two 16 bit insns can be executed in parallel,
672 otherwise it returns a pointer to an error message explaining why not. */
675 can_make_parallel (a, b)
682 /* Make sure the instructions are the right length. */
683 if ( CGEN_FIELDS_BITSIZE (& a->fields) != 16
684 || CGEN_FIELDS_BITSIZE (& b->fields) != 16)
687 if (first_writes_to_seconds_operands (a, b, true))
688 return _("Instructions write to the same destination register.");
690 a_pipe = CGEN_INSN_ATTR (a->insn, CGEN_INSN_PIPE);
691 b_pipe = CGEN_INSN_ATTR (b->insn, CGEN_INSN_PIPE);
693 /* Make sure that the instructions use the correct execution pipelines. */
694 if ( a_pipe == PIPE_NONE
695 || b_pipe == PIPE_NONE)
696 return _("Instructions do not use parallel execution pipelines.");
698 /* Leave this test for last, since it is the only test that can
699 go away if the instructions are swapped, and we want to make
700 sure that any other errors are detected before this happens. */
701 if ( a_pipe == PIPE_S
703 return _("Instructions share the same execution pipeline");
708 /* Force the top bit of the second 16-bit insn to be set. */
711 make_parallel (buffer)
712 CGEN_INSN_BYTES_PTR buffer;
717 buffer [CGEN_OPCODE_ENDIAN (gas_cgen_opcode_desc) == CGEN_ENDIAN_BIG ? 0 : 1]
722 /* Same as make_parallel except buffer contains the bytes in target order. */
725 target_make_parallel (buffer)
728 buffer [CGEN_OPCODE_ENDIAN (gas_cgen_opcode_desc) == CGEN_ENDIAN_BIG ? 0 : 1]
732 /* Assemble two instructions with an explicit parallel operation (||) or
733 sequential operation (->). */
735 assemble_two_insns (str, str2, parallel_p)
744 char save_str2 = *str2;
746 * str2 = 0; /* Seperate the two instructions. */
748 /* If there was a previous 16 bit insn, then fill the following 16 bit slot,
749 so that the parallel instruction will start on a 32 bit boundary. */
753 first.debug_sym_link = debug_sym_link;
754 debug_sym_link = (sym_linkS *)0;
756 /* Parse the first instruction. */
757 if (! (first.insn = m32r_cgen_assemble_insn
758 (gas_cgen_opcode_desc, str, & first.fields, first.buffer, & errmsg)))
765 && CGEN_INSN_ATTR (first.insn, CGEN_INSN_SPECIAL))
767 /* xgettext:c-format */
768 as_bad (_("unknown instruction '%s'"), str);
771 else if (! enable_m32rx
772 /* FIXME: Need standard macro to perform this test. */
773 && CGEN_INSN_ATTR (first.insn, CGEN_INSN_MACH) == (1 << MACH_M32RX))
775 /* xgettext:c-format */
776 as_bad (_("instruction '%s' is for the M32RX only"), str);
780 /* Check to see if this is an allowable parallel insn. */
781 if (parallel_p && CGEN_INSN_ATTR (first.insn, CGEN_INSN_PIPE) == PIPE_NONE)
783 /* xgettext:c-format */
784 as_bad (_("instruction '%s' cannot be executed in parallel."), str);
788 *str2 = save_str2; /* Restore the original assembly text, just in case it is needed. */
789 str3 = str; /* Save the original string pointer. */
790 str = str2 + 2; /* Advanced past the parsed string. */
791 str2 = str3; /* Remember the entire string in case it is needed for error messages. */
793 /* Convert the opcode to lower case. */
797 while (isspace (*s2 ++))
802 while (isalnum (*s2))
804 if (isupper ((unsigned char) *s2))
810 /* Preserve any fixups that have been generated and reset the list to empty. */
811 gas_cgen_save_fixups ();
813 /* Get the indices of the operands of the instruction. */
814 /* FIXME: CGEN_FIELDS is already recorded, but relying on that fact
815 doesn't seem right. Perhaps allow passing fields like we do insn. */
816 /* FIXME: ALIAS insns do not have operands, so we use this function
817 to find the equivalent insn and overwrite the value stored in our
818 structure. We still need the original insn, however, since this
819 may have certain attributes that are not present in the unaliased
820 version (eg relaxability). When aliases behave differently this
821 may have to change. */
822 first.orig_insn = first.insn;
823 first.insn = m32r_cgen_lookup_get_insn_operands
824 (gas_cgen_opcode_desc, NULL, INSN_VALUE (first.buffer), 16,
827 if (first.insn == NULL)
828 as_fatal (_("internal error: lookup/get operands failed"));
830 second.debug_sym_link = NULL;
832 /* Parse the second instruction. */
833 if (! (second.insn = m32r_cgen_assemble_insn
834 (gas_cgen_opcode_desc, str, & second.fields, second.buffer, & errmsg)))
842 && CGEN_INSN_ATTR (second.insn, CGEN_INSN_SPECIAL))
844 /* xgettext:c-format */
845 as_bad (_("unknown instruction '%s'"), str);
848 else if (! enable_m32rx
849 && CGEN_INSN_ATTR (second.insn, CGEN_INSN_MACH) == (1 << MACH_M32RX))
851 /* xgettext:c-format */
852 as_bad (_("instruction '%s' is for the M32RX only"), str);
856 /* Check to see if this is an allowable parallel insn. */
857 if (parallel_p && CGEN_INSN_ATTR (second.insn, CGEN_INSN_PIPE) == PIPE_NONE)
859 /* xgettext:c-format */
860 as_bad (_("instruction '%s' cannot be executed in parallel."), str);
864 if (parallel_p && ! enable_m32rx)
866 if (CGEN_INSN_NUM (first.insn) != M32R_INSN_NOP
867 && CGEN_INSN_NUM (second.insn) != M32R_INSN_NOP)
869 /* xgettext:c-format */
870 as_bad (_("'%s': only the NOP instruction can be issued in parallel on the m32r"), str2);
875 /* Get the indices of the operands of the instruction. */
876 second.orig_insn = second.insn;
877 second.insn = m32r_cgen_lookup_get_insn_operands
878 (gas_cgen_opcode_desc, NULL, INSN_VALUE (second.buffer), 16,
881 if (second.insn == NULL)
882 as_fatal (_("internal error: lookup/get operands failed"));
884 /* We assume that if the first instruction writes to a register that is
885 read by the second instruction it is because the programmer intended
886 this to happen, (after all they have explicitly requested that these
887 two instructions be executed in parallel). Although if the global
888 variable warn_explicit_parallel_conflicts is true then we do generate
889 a warning message. Similarly we assume that parallel branch and jump
890 instructions are deliberate and should not produce errors. */
892 if (parallel_p && warn_explicit_parallel_conflicts)
894 if (first_writes_to_seconds_operands (& first, & second, false))
895 /* xgettext:c-format */
896 as_warn (_("%s: output of 1st instruction is the same as an input to 2nd instruction - is this intentional ?"), str2);
898 if (first_writes_to_seconds_operands (& second, & first, false))
899 /* xgettext:c-format */
900 as_warn (_("%s: output of 2nd instruction is the same as an input to 1st instruction - is this intentional ?"), str2);
903 if (!parallel_p || (errmsg = (char *) can_make_parallel (& first, & second)) == NULL)
905 /* Get the fixups for the first instruction. */
906 gas_cgen_swap_fixups ();
909 expand_debug_syms (first.debug_sym_link, 1);
910 gas_cgen_finish_insn (first.orig_insn, first.buffer,
911 CGEN_FIELDS_BITSIZE (& first.fields), 0, NULL);
913 /* Force the top bit of the second insn to be set. */
915 make_parallel (second.buffer);
917 /* Get its fixups. */
918 gas_cgen_restore_fixups ();
921 expand_debug_syms (second.debug_sym_link, 1);
922 gas_cgen_finish_insn (second.orig_insn, second.buffer,
923 CGEN_FIELDS_BITSIZE (& second.fields), 0, NULL);
925 /* Try swapping the instructions to see if they work that way. */
926 else if (can_make_parallel (& second, & first) == NULL)
928 /* Write out the second instruction first. */
929 expand_debug_syms (second.debug_sym_link, 1);
930 gas_cgen_finish_insn (second.orig_insn, second.buffer,
931 CGEN_FIELDS_BITSIZE (& second.fields), 0, NULL);
933 /* Force the top bit of the first instruction to be set. */
934 make_parallel (first.buffer);
936 /* Get the fixups for the first instruction. */
937 gas_cgen_restore_fixups ();
939 /* Write out the first instruction. */
940 expand_debug_syms (first.debug_sym_link, 1);
941 gas_cgen_finish_insn (first.orig_insn, first.buffer,
942 CGEN_FIELDS_BITSIZE (& first.fields), 0, NULL);
946 as_bad ("'%s': %s", str2, errmsg);
950 /* Set these so m32r_fill_insn can use them. */
952 prev_subseg = now_subseg;
955 /* end-sanitize-m32rx */
966 /* Initialize GAS's cgen interface for a new instruction. */
967 gas_cgen_init_parse ();
969 /* start-sanitize-m32rx */
970 /* Look for a parallel instruction seperator. */
971 if ((str2 = strstr (str, "||")) != NULL)
973 assemble_two_insns (str, str2, 1);
977 /* Also look for a sequential instruction seperator. */
978 if ((str2 = strstr (str, "->")) != NULL)
980 assemble_two_insns (str, str2, 0);
983 /* end-sanitize-m32rx */
985 insn.debug_sym_link = debug_sym_link;
986 debug_sym_link = (sym_linkS *)0;
988 insn.insn = m32r_cgen_assemble_insn
989 (gas_cgen_opcode_desc, str, & insn.fields, insn.buffer, & errmsg);
997 /* start-sanitize-m32rx */
999 && CGEN_INSN_ATTR (insn.insn, CGEN_INSN_SPECIAL))
1001 /* xgettext:c-format */
1002 as_bad (_("unknown instruction '%s'"), str);
1005 else if (! enable_m32rx
1006 && CGEN_INSN_ATTR (insn.insn, CGEN_INSN_MACH) == (1 << MACH_M32RX))
1008 /* xgettext:c-format */
1009 as_bad (_("instruction '%s' is for the M32RX only"), str);
1012 /* end-sanitize-m32rx */
1014 if (CGEN_INSN_BITSIZE (insn.insn) == 32)
1016 /* 32 bit insns must live on 32 bit boundaries. */
1017 if (prev_insn.insn || seen_relaxable_p)
1019 /* ??? If calling fill_insn too many times turns us into a memory
1020 pig, can we call a fn to assemble a nop instead of
1021 !seen_relaxable_p? */
1025 expand_debug_syms (insn.debug_sym_link, 2);
1027 /* Doesn't really matter what we pass for RELAX_P here. */
1028 gas_cgen_finish_insn (insn.insn, insn.buffer,
1029 CGEN_FIELDS_BITSIZE (& insn.fields), 1, NULL);
1033 int on_32bit_boundary_p;
1034 /* start-sanitize-m32rx */
1036 /* end-sanitize-m32rx */
1038 if (CGEN_INSN_BITSIZE (insn.insn) != 16)
1041 insn.orig_insn = insn.insn;
1042 /* start-sanitize-m32rx */
1045 /* Get the indices of the operands of the instruction.
1046 FIXME: See assemble_parallel for notes on orig_insn. */
1047 insn.insn = m32r_cgen_lookup_get_insn_operands
1048 (gas_cgen_opcode_desc, NULL, INSN_VALUE (insn.buffer),
1051 if (insn.insn == NULL)
1052 as_fatal (_("internal error: lookup/get operands failed"));
1054 /* end-sanitize-m32rx */
1056 /* Compute whether we're on a 32 bit boundary or not.
1057 prev_insn.insn is NULL when we're on a 32 bit boundary. */
1058 on_32bit_boundary_p = prev_insn.insn == NULL;
1060 /* start-sanitize-m32rx */
1061 /* Look to see if this instruction can be combined with the
1062 previous instruction to make one, parallel, 32 bit instruction.
1063 If the previous instruction (potentially) changed the flow of
1064 program control, then it cannot be combined with the current
1065 instruction. If the current instruction is relaxable, then it
1066 might be replaced with a longer version, so we cannot combine it.
1067 Also if the output of the previous instruction is used as an
1068 input to the current instruction then it cannot be combined.
1069 Otherwise call can_make_parallel() with both orderings of the
1070 instructions to see if they can be combined. */
1071 if ( ! on_32bit_boundary_p
1074 && CGEN_INSN_ATTR (insn.orig_insn, CGEN_INSN_RELAXABLE) == 0
1075 && ! writes_to_pc (& prev_insn)
1076 && ! first_writes_to_seconds_operands (& prev_insn, &insn, false)
1079 if (can_make_parallel (& prev_insn, & insn) == NULL)
1080 make_parallel (insn.buffer);
1081 else if (can_make_parallel (& insn, & prev_insn) == NULL)
1084 /* end-sanitize-m32rx */
1086 expand_debug_syms (insn.debug_sym_link, 1);
1092 /* Ensure each pair of 16 bit insns is in the same frag. */
1095 gas_cgen_finish_insn (insn.orig_insn, insn.buffer,
1096 CGEN_FIELDS_BITSIZE (& insn.fields),
1097 1 /*relax_p*/, &fi);
1098 insn.addr = fi.addr;
1099 insn.frag = fi.frag;
1100 insn.num_fixups = fi.num_fixups;
1101 for (i = 0; i < fi.num_fixups; ++i)
1102 insn.fixups[i] = fi.fixups[i];
1105 /* start-sanitize-m32rx */
1110 #define SWAP_BYTES(a,b) tmp = a; a = b; b = tmp
1112 /* Swap the two insns */
1113 SWAP_BYTES (prev_insn.addr [0], insn.addr [0]);
1114 SWAP_BYTES (prev_insn.addr [1], insn.addr [1]);
1116 target_make_parallel (insn.addr);
1118 /* Swap any relaxable frags recorded for the two insns. */
1119 /* FIXME: Clarify. relaxation precludes parallel insns */
1120 if (prev_insn.frag->fr_opcode == prev_insn.addr)
1121 prev_insn.frag->fr_opcode = insn.addr;
1122 else if (insn.frag->fr_opcode == insn.addr)
1123 insn.frag->fr_opcode = prev_insn.addr;
1125 /* Update the addresses in any fixups.
1126 Note that we don't have to handle the case where each insn is in
1127 a different frag as we ensure they're in the same frag above. */
1128 for (i = 0; i < prev_insn.num_fixups; ++i)
1129 prev_insn.fixups[i]->fx_where += 2;
1130 for (i = 0; i < insn.num_fixups; ++i)
1131 insn.fixups[i]->fx_where -= 2;
1133 /* end-sanitize-m32rx */
1135 /* Keep track of whether we've seen a pair of 16 bit insns.
1136 prev_insn.insn is NULL when we're on a 32 bit boundary. */
1137 if (on_32bit_boundary_p)
1140 prev_insn.insn = NULL;
1142 /* If the insn needs the following one to be on a 32 bit boundary
1143 (e.g. subroutine calls), fill this insn's slot. */
1144 if (on_32bit_boundary_p
1145 && CGEN_INSN_ATTR (insn.orig_insn, CGEN_INSN_FILL_SLOT) != 0)
1148 /* If this is a relaxable insn (can be replaced with a larger version)
1149 mark the fact so that we can emit an alignment directive for a
1150 following 32 bit insn if we see one. */
1151 if (CGEN_INSN_ATTR (insn.orig_insn, CGEN_INSN_RELAXABLE) != 0)
1152 seen_relaxable_p = 1;
1155 /* Set these so m32r_fill_insn can use them. */
1157 prev_subseg = now_subseg;
1160 /* The syntax in the manual says constants begin with '#'.
1161 We just ignore it. */
1164 md_operand (expressionP)
1165 expressionS * expressionP;
1167 if (* input_line_pointer == '#')
1169 input_line_pointer ++;
1170 expression (expressionP);
1175 md_section_align (segment, size)
1179 int align = bfd_get_section_alignment (stdoutput, segment);
1180 return ((size + (1 << align) - 1) & (-1 << align));
1184 md_undefined_symbol (name)
1190 /* .scomm pseudo-op handler.
1192 This is a new pseudo-op to handle putting objects in .scommon.
1193 By doing this the linker won't need to do any work and more importantly
1194 it removes the implicit -G arg necessary to correctly link the object file.
1201 register char * name;
1205 register symbolS * symbolP;
1209 name = input_line_pointer;
1210 c = get_symbol_end ();
1212 /* just after name is now '\0' */
1213 p = input_line_pointer;
1216 if (* input_line_pointer != ',')
1218 as_bad (_("Expected comma after symbol-name: rest of line ignored."));
1219 ignore_rest_of_line ();
1223 input_line_pointer ++; /* skip ',' */
1224 if ((size = get_absolute_expression ()) < 0)
1226 /* xgettext:c-format */
1227 as_warn (_(".SCOMMon length (%ld.) <0! Ignored."), (long) size);
1228 ignore_rest_of_line ();
1232 /* The third argument to .scomm is the alignment. */
1233 if (* input_line_pointer != ',')
1237 ++ input_line_pointer;
1238 align = get_absolute_expression ();
1241 as_warn (_("ignoring bad alignment"));
1245 /* Convert to a power of 2 alignment. */
1248 for (align2 = 0; (align & 1) == 0; align >>= 1, ++ align2)
1252 as_bad (_("Common alignment not a power of 2"));
1253 ignore_rest_of_line ();
1261 symbolP = symbol_find_or_make (name);
1264 if (S_IS_DEFINED (symbolP))
1266 /* xgettext:c-format */
1267 as_bad (_("Ignoring attempt to re-define symbol `%s'."),
1268 S_GET_NAME (symbolP));
1269 ignore_rest_of_line ();
1273 if (S_GET_VALUE (symbolP) && S_GET_VALUE (symbolP) != (valueT) size)
1275 /* xgettext:c-format */
1276 as_bad (_("Length of .scomm \"%s\" is already %ld. Not changed to %ld."),
1277 S_GET_NAME (symbolP),
1278 (long) S_GET_VALUE (symbolP),
1281 ignore_rest_of_line ();
1287 segT old_sec = now_seg;
1288 int old_subsec = now_subseg;
1291 record_alignment (sbss_section, align2);
1292 subseg_set (sbss_section, 0);
1295 frag_align (align2, 0, 0);
1297 if (S_GET_SEGMENT (symbolP) == sbss_section)
1298 symbolP->sy_frag->fr_symbol = 0;
1300 symbolP->sy_frag = frag_now;
1302 pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, size,
1305 S_SET_SIZE (symbolP, size);
1306 S_SET_SEGMENT (symbolP, sbss_section);
1307 S_CLEAR_EXTERNAL (symbolP);
1308 subseg_set (old_sec, old_subsec);
1312 S_SET_VALUE (symbolP, (valueT) size);
1313 S_SET_ALIGN (symbolP, align2);
1314 S_SET_EXTERNAL (symbolP);
1315 S_SET_SEGMENT (symbolP, & scom_section);
1318 demand_empty_rest_of_line ();
1321 /* Interface to relax_segment. */
1323 /* FIXME: Build table by hand, get it working, then machine generate. */
1325 const relax_typeS md_relax_table[] =
1328 1) most positive reach of this state,
1329 2) most negative reach of this state,
1330 3) how many bytes this mode will add to the size of the current frag
1331 4) which index into the table to try if we can't fit into this one. */
1333 /* The first entry must be unused because an `rlx_more' value of zero ends
1337 /* The displacement used by GAS is from the end of the 2 byte insn,
1338 so we subtract 2 from the following. */
1339 /* 16 bit insn, 8 bit disp -> 10 bit range.
1340 This doesn't handle a branch in the right slot at the border:
1341 the "& -4" isn't taken into account. It's not important enough to
1342 complicate things over it, so we subtract an extra 2 (or + 2 in -ve
1344 {511 - 2 - 2, -512 - 2 + 2, 0, 2 },
1345 /* 32 bit insn, 24 bit disp -> 26 bit range. */
1346 {0x2000000 - 1 - 2, -0x2000000 - 2, 2, 0 },
1347 /* Same thing, but with leading nop for alignment. */
1348 {0x2000000 - 1 - 2, -0x2000000 - 2, 4, 0 }
1352 m32r_relax_frag (fragP, stretch)
1356 /* Address of branch insn. */
1357 long address = fragP->fr_address + fragP->fr_fix - 2;
1360 /* Keep 32 bit insns aligned on 32 bit boundaries. */
1361 if (fragP->fr_subtype == 2)
1363 if ((address & 3) != 0)
1365 fragP->fr_subtype = 3;
1369 else if (fragP->fr_subtype == 3)
1371 if ((address & 3) == 0)
1373 fragP->fr_subtype = 2;
1379 growth = relax_frag (fragP, stretch);
1381 /* Long jump on odd halfword boundary? */
1382 if (fragP->fr_subtype == 2 && (address & 3) != 0)
1384 fragP->fr_subtype = 3;
1392 /* Return an initial guess of the length by which a fragment must grow to
1393 hold a branch to reach its destination.
1394 Also updates fr_type/fr_subtype as necessary.
1396 Called just before doing relaxation.
1397 Any symbol that is now undefined will not become defined.
1398 The guess for fr_var is ACTUALLY the growth beyond fr_fix.
1399 Whatever we do to grow fr_fix or fr_var contributes to our returned value.
1400 Although it may not be explicit in the frag, pretend fr_var starts with a
1404 md_estimate_size_before_relax (fragP, segment)
1408 int old_fr_fix = fragP->fr_fix;
1410 /* The only thing we have to handle here are symbols outside of the
1411 current segment. They may be undefined or in a different segment in
1412 which case linker scripts may place them anywhere.
1413 However, we can't finish the fragment here and emit the reloc as insn
1414 alignment requirements may move the insn about. */
1416 if (S_GET_SEGMENT (fragP->fr_symbol) != segment)
1418 /* The symbol is undefined in this segment.
1419 Change the relaxation subtype to the max allowable and leave
1420 all further handling to md_convert_frag. */
1421 fragP->fr_subtype = 2;
1423 #if 0 /* Can't use this, but leave in for illustration. */
1424 /* Change 16 bit insn to 32 bit insn. */
1425 fragP->fr_opcode[0] |= 0x80;
1427 /* Increase known (fixed) size of fragment. */
1430 /* Create a relocation for it. */
1431 fix_new (fragP, old_fr_fix, 4,
1433 fragP->fr_offset, 1 /* pcrel */,
1434 /* FIXME: Can't use a real BFD reloc here.
1435 gas_cgen_md_apply_fix3 can't handle it. */
1436 BFD_RELOC_M32R_26_PCREL);
1438 /* Mark this fragment as finished. */
1442 const CGEN_INSN * insn;
1445 /* Update the recorded insn.
1446 Fortunately we don't have to look very far.
1447 FIXME: Change this to record in the instruction the next higher
1448 relaxable insn to use. */
1449 for (i = 0, insn = fragP->fr_cgen.insn; i < 4; i++, insn++)
1451 if ((strcmp (CGEN_INSN_MNEMONIC (insn),
1452 CGEN_INSN_MNEMONIC (fragP->fr_cgen.insn))
1454 && CGEN_INSN_ATTR (insn, CGEN_INSN_RELAX))
1460 fragP->fr_cgen.insn = insn;
1466 return (fragP->fr_var + fragP->fr_fix - old_fr_fix);
1469 /* *fragP has been relaxed to its final size, and now needs to have
1470 the bytes inside it modified to conform to the new size.
1472 Called after relaxation is finished.
1473 fragP->fr_type == rs_machine_dependent.
1474 fragP->fr_subtype is the subtype of what the address relaxed to. */
1477 md_convert_frag (abfd, sec, fragP)
1483 char * displacement;
1489 opcode = fragP->fr_opcode;
1491 /* Address opcode resides at in file space. */
1492 opcode_address = fragP->fr_address + fragP->fr_fix - 2;
1494 switch (fragP->fr_subtype)
1498 displacement = & opcode[1];
1503 displacement = & opcode[1];
1506 opcode[2] = opcode[0] | 0x80;
1507 md_number_to_chars (opcode, PAR_NOP_INSN, 2);
1508 opcode_address += 2;
1510 displacement = & opcode[3];
1516 if (S_GET_SEGMENT (fragP->fr_symbol) != sec)
1518 /* symbol must be resolved by linker */
1519 if (fragP->fr_offset & 3)
1520 as_warn (_("Addend to unresolved symbol not on word boundary."));
1521 addend = fragP->fr_offset >> 2;
1525 /* Address we want to reach in file space. */
1526 target_address = S_GET_VALUE (fragP->fr_symbol) + fragP->fr_offset;
1527 target_address += fragP->fr_symbol->sy_frag->fr_address;
1528 addend = (target_address - (opcode_address & -4)) >> 2;
1531 /* Create a relocation for symbols that must be resolved by the linker.
1532 Otherwise output the completed insn. */
1534 if (S_GET_SEGMENT (fragP->fr_symbol) != sec)
1536 assert (fragP->fr_subtype != 1);
1537 assert (fragP->fr_cgen.insn != 0);
1538 gas_cgen_record_fixup (fragP,
1539 /* Offset of branch insn in frag. */
1540 fragP->fr_fix + extension - 4,
1541 fragP->fr_cgen.insn,
1543 /* FIXME: quick hack */
1545 CGEN_OPERAND_ENTRY (fragP->fr_cgen.opindex),
1547 CGEN_OPERAND_ENTRY (M32R_OPERAND_DISP24),
1549 fragP->fr_cgen.opinfo,
1550 fragP->fr_symbol, fragP->fr_offset);
1553 #define SIZE_FROM_RELAX_STATE(n) ((n) == 1 ? 1 : 3)
1555 md_number_to_chars (displacement, (valueT) addend,
1556 SIZE_FROM_RELAX_STATE (fragP->fr_subtype));
1558 fragP->fr_fix += extension;
1561 /* Functions concerning relocs. */
1563 /* The location from which a PC relative jump should be calculated,
1564 given a PC relative reloc. */
1567 md_pcrel_from_section (fixP, sec)
1571 if (fixP->fx_addsy != (symbolS *) NULL
1572 && (! S_IS_DEFINED (fixP->fx_addsy)
1573 || S_GET_SEGMENT (fixP->fx_addsy) != sec))
1575 /* The symbol is undefined (or is defined but not in this section).
1576 Let the linker figure it out. */
1580 return (fixP->fx_frag->fr_address + fixP->fx_where) & -4L;
1583 /* Return the bfd reloc type for OPERAND of INSN at fixup FIXP.
1584 Returns BFD_RELOC_NONE if no reloc type can be found.
1585 *FIXP may be modified if desired. */
1587 bfd_reloc_code_real_type
1588 md_cgen_lookup_reloc (insn, operand, fixP)
1589 const CGEN_INSN * insn;
1590 const CGEN_OPERAND * operand;
1593 switch (CGEN_OPERAND_TYPE (operand))
1595 case M32R_OPERAND_DISP8 : return BFD_RELOC_M32R_10_PCREL;
1596 case M32R_OPERAND_DISP16 : return BFD_RELOC_M32R_18_PCREL;
1597 case M32R_OPERAND_DISP24 : return BFD_RELOC_M32R_26_PCREL;
1598 case M32R_OPERAND_UIMM24 : return BFD_RELOC_M32R_24;
1599 case M32R_OPERAND_HI16 :
1600 case M32R_OPERAND_SLO16 :
1601 case M32R_OPERAND_ULO16 :
1602 /* If low/high/shigh/sda was used, it is recorded in `opinfo'. */
1603 if (fixP->tc_fix_data.opinfo != 0)
1604 return fixP->tc_fix_data.opinfo;
1606 default : /* avoid -Wall warning */
1609 return BFD_RELOC_NONE;
1612 /* Record a HI16 reloc for later matching with its LO16 cousin. */
1615 m32r_record_hi16 (reloc_type, fixP, seg)
1620 struct m32r_hi_fixup * hi_fixup;
1622 assert (reloc_type == BFD_RELOC_M32R_HI16_SLO
1623 || reloc_type == BFD_RELOC_M32R_HI16_ULO);
1625 hi_fixup = ((struct m32r_hi_fixup *)
1626 xmalloc (sizeof (struct m32r_hi_fixup)));
1627 hi_fixup->fixp = fixP;
1628 hi_fixup->seg = now_seg;
1629 hi_fixup->next = m32r_hi_fixup_list;
1631 m32r_hi_fixup_list = hi_fixup;
1634 /* Called while parsing an instruction to create a fixup.
1635 We need to check for HI16 relocs and queue them up for later sorting. */
1638 m32r_cgen_record_fixup_exp (frag, where, insn, length, operand, opinfo, exp)
1641 const CGEN_INSN * insn;
1643 const CGEN_OPERAND * operand;
1647 fixS * fixP = gas_cgen_record_fixup_exp (frag, where, insn, length,
1648 operand, opinfo, exp);
1650 switch (CGEN_OPERAND_TYPE (operand))
1652 case M32R_OPERAND_HI16 :
1653 /* If low/high/shigh/sda was used, it is recorded in `opinfo'. */
1654 if (fixP->tc_fix_data.opinfo == BFD_RELOC_M32R_HI16_SLO
1655 || fixP->tc_fix_data.opinfo == BFD_RELOC_M32R_HI16_ULO)
1656 m32r_record_hi16 (fixP->tc_fix_data.opinfo, fixP, now_seg);
1658 default : /* avoid -Wall warning */
1665 /* Return BFD reloc type from opinfo field in a fixS.
1666 It's tricky using fx_r_type in m32r_frob_file because the values
1667 are BFD_RELOC_UNUSED + operand number. */
1668 #define FX_OPINFO_R_TYPE(f) ((f)->tc_fix_data.opinfo)
1670 /* Sort any unmatched HI16 relocs so that they immediately precede
1671 the corresponding LO16 reloc. This is called before md_apply_fix and
1677 struct m32r_hi_fixup * l;
1679 for (l = m32r_hi_fixup_list; l != NULL; l = l->next)
1681 segment_info_type * seginfo;
1684 assert (FX_OPINFO_R_TYPE (l->fixp) == BFD_RELOC_M32R_HI16_SLO
1685 || FX_OPINFO_R_TYPE (l->fixp) == BFD_RELOC_M32R_HI16_ULO);
1687 /* Check quickly whether the next fixup happens to be a matching low. */
1688 if (l->fixp->fx_next != NULL
1689 && FX_OPINFO_R_TYPE (l->fixp->fx_next) == BFD_RELOC_M32R_LO16
1690 && l->fixp->fx_addsy == l->fixp->fx_next->fx_addsy
1691 && l->fixp->fx_offset == l->fixp->fx_next->fx_offset)
1694 /* Look through the fixups for this segment for a matching `low'.
1695 When we find one, move the high/shigh just in front of it. We do
1696 this in two passes. In the first pass, we try to find a
1697 unique `low'. In the second pass, we permit multiple high's
1698 relocs for a single `low'. */
1699 seginfo = seg_info (l->seg);
1700 for (pass = 0; pass < 2; pass++)
1706 for (f = seginfo->fix_root; f != NULL; f = f->fx_next)
1708 /* Check whether this is a `low' fixup which matches l->fixp. */
1709 if (FX_OPINFO_R_TYPE (f) == BFD_RELOC_M32R_LO16
1710 && f->fx_addsy == l->fixp->fx_addsy
1711 && f->fx_offset == l->fixp->fx_offset
1714 || (FX_OPINFO_R_TYPE (prev) != BFD_RELOC_M32R_HI16_SLO
1715 && FX_OPINFO_R_TYPE (prev) != BFD_RELOC_M32R_HI16_ULO)
1716 || prev->fx_addsy != f->fx_addsy
1717 || prev->fx_offset != f->fx_offset))
1721 /* Move l->fixp before f. */
1722 for (pf = &seginfo->fix_root;
1724 pf = & (* pf)->fx_next)
1725 assert (* pf != NULL);
1727 * pf = l->fixp->fx_next;
1729 l->fixp->fx_next = f;
1731 seginfo->fix_root = l->fixp;
1733 prev->fx_next = l->fixp;
1745 && warn_unmatched_high)
1746 as_warn_where (l->fixp->fx_file, l->fixp->fx_line,
1747 _("Unmatched high/shigh reloc"));
1752 /* See whether we need to force a relocation into the output file.
1753 This is used to force out switch and PC relative relocations when
1757 m32r_force_relocation (fix)
1760 if (fix->fx_r_type == BFD_RELOC_VTABLE_INHERIT
1761 || fix->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
1767 return (fix->fx_pcrel
1771 /* Write a value out to the object file, using the appropriate endianness. */
1774 md_number_to_chars (buf, val, n)
1779 if (target_big_endian)
1780 number_to_chars_bigendian (buf, val, n);
1782 number_to_chars_littleendian (buf, val, n);
1785 /* Turn a string in input_line_pointer into a floating point constant of type
1786 type, and store the appropriate bytes in *litP. The number of LITTLENUMS
1787 emitted is stored in *sizeP . An error message is returned, or NULL on OK.
1790 /* Equal to MAX_PRECISION in atof-ieee.c */
1791 #define MAX_LITTLENUMS 6
1794 md_atof (type, litP, sizeP)
1801 LITTLENUM_TYPE words [MAX_LITTLENUMS];
1803 char * atof_ieee ();
1821 /* FIXME: Some targets allow other format chars for bigger sizes here. */
1825 return _("Bad call to md_atof()");
1828 t = atof_ieee (input_line_pointer, type, words);
1830 input_line_pointer = t;
1831 * sizeP = prec * sizeof (LITTLENUM_TYPE);
1833 if (target_big_endian)
1835 for (i = 0; i < prec; i++)
1837 md_number_to_chars (litP, (valueT) words[i],
1838 sizeof (LITTLENUM_TYPE));
1839 litP += sizeof (LITTLENUM_TYPE);
1844 for (i = prec - 1; i >= 0; i--)
1846 md_number_to_chars (litP, (valueT) words[i],
1847 sizeof (LITTLENUM_TYPE));
1848 litP += sizeof (LITTLENUM_TYPE);
1856 m32r_elf_section_change_hook ()
1858 /* If we have reached the end of a section and we have just emitted a
1859 16 bit insn, then emit a nop to make sure that the section ends on
1860 a 32 bit boundary. */
1862 if (prev_insn.insn || seen_relaxable_p)
1863 (void) m32r_fill_insn (0);
1867 m32r_fix_adjustable (fixP)
1871 if (fixP->fx_addsy == NULL)
1874 /* Prevent all adjustments to global symbols. */
1875 if (S_IS_EXTERN (fixP->fx_addsy))
1877 if (S_IS_WEAK (fixP->fx_addsy))
1880 /* We need the symbol name for the VTABLE entries */
1881 if (fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT
1882 || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY)