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+/* tc-mmix.h -- Header file for tc-mmix.c.
+ Copyright (C) 2001, 2002, 2003, 2005, 2007, 2008
+ Free Software Foundation, Inc.
+ Written by Hans-Peter Nilsson (hp@bitrange.com).
+
+ This file is part of GAS, the GNU Assembler.
+
+ GAS is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3, or (at your option)
+ any later version.
+
+ GAS is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GAS; see the file COPYING. If not, write to the Free
+ Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
+ 02110-1301, USA. */
+
+#define TC_MMIX
+
+/* See gas/doc/internals.texi for explanation of these macros. */
+#define TARGET_FORMAT "elf64-mmix"
+#define TARGET_ARCH bfd_arch_mmix
+#define TARGET_BYTES_BIG_ENDIAN 1
+
+extern const char mmix_comment_chars[];
+#define tc_comment_chars mmix_comment_chars
+
+extern const char mmix_symbol_chars[];
+#define tc_symbol_chars mmix_symbol_chars
+
+extern const char mmix_exp_chars[];
+#define EXP_CHARS mmix_exp_chars
+
+extern const char mmix_flt_chars[];
+#define FLT_CHARS mmix_flt_chars
+
+/* "@" is a synonym for ".". */
+#define LEX_AT (LEX_BEGIN_NAME)
+
+extern int mmix_label_without_colon_this_line (void);
+#define LABELS_WITHOUT_COLONS mmix_label_without_colon_this_line ()
+
+extern int mmix_next_semicolon_is_eoln;
+#define TC_EOL_IN_INSN(p) (*(p) == ';' && ! mmix_next_semicolon_is_eoln)
+
+/* This is one direction we can get mmixal compatibility. */
+extern void mmix_handle_mmixal (void);
+#define md_start_line_hook mmix_handle_mmixal
+
+extern void mmix_md_begin (void);
+#define md_begin mmix_md_begin
+
+extern void mmix_md_end (void);
+#define md_end mmix_md_end
+
+extern int mmix_current_location \
+ (void (*fn) (expressionS *), expressionS *);
+extern int mmix_parse_predefined_name (char *, expressionS *);
+
+extern char *mmix_current_prefix;
+
+/* A bit ugly, since we "know" that there's a static function
+ current_location that does what we want. We also strip off a leading
+ ':' in another ugly way.
+
+ The [DVWIOUZX]_Handler symbols are provided when-used. */
+
+extern int mmix_gnu_syntax;
+#define md_parse_name(name, exp, mode, cpos) \
+ (! mmix_gnu_syntax \
+ && (name[0] == '@' \
+ ? (! is_part_of_name (name[1]) \
+ && mmix_current_location (current_location, exp)) \
+ : ((name[0] == ':' || ISUPPER (name[0])) \
+ && mmix_parse_predefined_name (name, exp))))
+
+extern char *mmix_prefix_name (char *);
+
+/* We implement when *creating* a symbol, we also need to strip a ':' or
+ prepend a prefix. */
+#define tc_canonicalize_symbol_name(x) \
+ (mmix_current_prefix == NULL && (x)[0] != ':' ? (x) : mmix_prefix_name (x))
+
+#define md_undefined_symbol(x) NULL
+
+extern void mmix_fb_label (expressionS *);
+
+/* Since integer_constant is local to expr.c, we have to make this a
+ macro. FIXME: Do it cleaner. */
+#define md_operand(exp) \
+ do \
+ { \
+ if (input_line_pointer[0] == '#') \
+ { \
+ input_line_pointer++; \
+ integer_constant (16, (exp)); \
+ } \
+ else if (input_line_pointer[0] == '&' \
+ && input_line_pointer[1] != '&') \
+ as_bad (_("`&' serial number operator is not supported")); \
+ else \
+ mmix_fb_label (exp); \
+ } \
+ while (0)
+
+/* Gas dislikes the 2ADD, 8ADD etc. insns, so we have to assemble them in
+ the error-recovery loop. Hopefully there are no significant
+ differences. Also, space on a line isn't gracefully handled. */
+extern int mmix_assemble_return_nonzero (char *);
+#define tc_unrecognized_line(c) \
+ ((c) == ' ' \
+ || (((c) == '1' || (c) == '2' || (c) == '4' || (c) == '8') \
+ && mmix_assemble_return_nonzero (input_line_pointer - 1)))
+
+#define md_number_to_chars number_to_chars_bigendian
+
+#define WORKING_DOT_WORD
+
+extern const struct relax_type mmix_relax_table[];
+#define TC_GENERIC_RELAX_TABLE mmix_relax_table
+
+/* We use the relax table for everything except the GREG frags and PUSHJ. */
+extern long mmix_md_relax_frag (segT, fragS *, long);
+#define md_relax_frag mmix_md_relax_frag
+
+#define tc_fix_adjustable(FIX) \
+ (((FIX)->fx_addsy == NULL \
+ || S_GET_SEGMENT ((FIX)->fx_addsy) != reg_section) \
+ && (FIX)->fx_r_type != BFD_RELOC_VTABLE_INHERIT \
+ && (FIX)->fx_r_type != BFD_RELOC_VTABLE_ENTRY \
+ && (FIX)->fx_r_type != BFD_RELOC_MMIX_LOCAL)
+
+/* Adjust symbols which are registers. */
+#define tc_adjust_symtab() mmix_adjust_symtab ()
+extern void mmix_adjust_symtab (void);
+
+/* Here's where we make all symbols global, when so requested.
+ We must avoid doing that for expression symbols or section symbols,
+ though. */
+extern int mmix_globalize_symbols;
+#define tc_frob_symbol(sym, punt) \
+ do \
+ { \
+ if (S_GET_SEGMENT (sym) == reg_section) \
+ { \
+ if (S_GET_NAME (sym)[0] != '$' \
+ && S_GET_VALUE (sym) < 256) \
+ { \
+ if (mmix_globalize_symbols) \
+ S_SET_EXTERNAL (sym); \
+ else \
+ symbol_mark_used_in_reloc (sym); \
+ } \
+ } \
+ else if (mmix_globalize_symbols \
+ && ! symbol_section_p (sym) \
+ && sym != section_symbol (absolute_section) \
+ && ! S_IS_LOCAL (sym)) \
+ S_SET_EXTERNAL (sym); \
+ } \
+ while (0)
+
+/* No shared lib support, so we don't need to ensure externally
+ visible symbols can be overridden. */
+#define EXTERN_FORCE_RELOC 0
+
+/* When relaxing, we need to emit various relocs we otherwise wouldn't. */
+#define TC_FORCE_RELOCATION(fix) mmix_force_relocation (fix)
+extern int mmix_force_relocation (struct fix *);
+
+/* Call md_pcrel_from_section(), not md_pcrel_from(). */
+#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC)
+extern long md_pcrel_from_section (struct fix *, segT);
+
+#define md_section_align(seg, size) (size)
+
+#define LISTING_HEADER "GAS for MMIX"
+
+/* The default of 4 means Bcc expansion looks like it's missing a line. */
+#define LISTING_LHS_CONT_LINES 5
+
+extern fragS *mmix_opcode_frag;
+#define TC_FRAG_TYPE fragS *
+#define TC_FRAG_INIT(frag) (frag)->tc_frag_data = mmix_opcode_frag
+
+/* We need to associate each section symbol with a list of GREGs defined
+ for that section/segment and sorted on offset, between the point where
+ all symbols have been evaluated and all frags mapped, and when the
+ fixups are done and relocs are output. Similarly for each unknown
+ symbol. */
+extern void mmix_frob_file (void);
+#define tc_frob_file_before_fix() \
+ do \
+ { \
+ int i = 0; \
+ \
+ /* It's likely mmix_frob_file changed (removed) sections, so make \
+ sure sections are correctly numbered as per renumber_sections, \
+ (static to write.c where this macro is called). */ \
+ mmix_frob_file (); \
+ bfd_map_over_sections (stdoutput, renumber_sections, &i); \
+ } \
+ while (0)
+
+/* Used by mmix_frob_file. Hangs on section symbols and unknown symbols. */
+struct mmix_symbol_gregs;
+#define TC_SYMFIELD_TYPE struct mmix_symbol_gregs *
+
+/* Used by relaxation, counting maximum needed PUSHJ stubs for a section. */
+struct mmix_segment_info_type
+ {
+ /* We only need to keep track of the last stubbable frag because
+ there's no less hackish way to keep track of different relaxation
+ rounds. */
+ fragS *last_stubfrag;
+ bfd_size_type nstubs;
+ };
+#define TC_SEGMENT_INFO_TYPE struct mmix_segment_info_type
+
+extern void mmix_md_elf_section_change_hook (void);
+#define md_elf_section_change_hook mmix_md_elf_section_change_hook
+
+extern void mmix_md_do_align (int, char *, int, int);
+#define md_do_align(n, fill, len, max, label) \
+ mmix_md_do_align (n, fill, len, max)
+
+/* Each insn is a tetrabyte (4 bytes) long, but if there are BYTE
+ sequences sprinkled in, we can get unaligned DWARF2 offsets, so let's
+ explicitly say one byte. */
+#define DWARF2_LINE_MIN_INSN_LENGTH 1
+
+/* This target is buggy, and sets fix size too large. */
+#define TC_FX_SIZE_SLACK(FIX) 6
+
+/* MMIX has global register symbols. */
+#define TC_GLOBAL_REGISTER_SYMBOL_OK