[deliverable/binutils-gdb.git] / gas / config / tc-mmix.h

/* tc-mmix.h -- Header file for tc-mmix.c.
   Copyright (C) 2001, 2002, 2003, 2005, 2007 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 mmix_frob_file

/* 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
Commit	Line	Data
3c3bdf30	1	/* tc-mmix.h -- Header file for tc-mmix.c.
ec2655a6	2	Copyright (C) 2001, 2002, 2003, 2005, 2007 Free Software Foundation, Inc.
3c3bdf30 NC	3	Written by Hans-Peter Nilsson (hp@bitrange.com).
	4
	5	This file is part of GAS, the GNU Assembler.
	6
	7	GAS is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
ec2655a6	9	the Free Software Foundation; either version 3, or (at your option)
3c3bdf30 NC	10	any later version.
	11
	12	GAS is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with GAS; see the file COPYING. If not, write to the Free
4b4da160 NC	19	Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
4b4da160 NC	20	02110-1301, USA. */
3c3bdf30 NC	21
	22	#define TC_MMIX
	23
	24	/* See gas/doc/internals.texi for explanation of these macros. */
	25	#define TARGET_FORMAT "elf64-mmix"
	26	#define TARGET_ARCH bfd_arch_mmix
	27	#define TARGET_BYTES_BIG_ENDIAN 1
	28
	29	extern const char mmix_comment_chars[];
	30	#define tc_comment_chars mmix_comment_chars
	31
	32	extern const char mmix_symbol_chars[];
	33	#define tc_symbol_chars mmix_symbol_chars
	34
	35	extern const char mmix_exp_chars[];
	36	#define EXP_CHARS mmix_exp_chars
	37
	38	extern const char mmix_flt_chars[];
	39	#define FLT_CHARS mmix_flt_chars
	40
	41	/* "@" is a synonym for ".". */
	42	#define LEX_AT (LEX_BEGIN_NAME)
	43
ff1e783f	44	extern int mmix_label_without_colon_this_line (void);
3c3bdf30 NC	45	#define LABELS_WITHOUT_COLONS mmix_label_without_colon_this_line ()
	46
	47	extern int mmix_next_semicolon_is_eoln;
	48	#define TC_EOL_IN_INSN(p) (*(p) == ';' && ! mmix_next_semicolon_is_eoln)
	49
	50	/* This is one direction we can get mmixal compatibility. */
ff1e783f	51	extern void mmix_handle_mmixal (void);
3c3bdf30 NC	52	#define md_start_line_hook mmix_handle_mmixal
3c3bdf30 NC	53
ff1e783f	54	extern void mmix_md_begin (void);
3c3bdf30 NC	55	#define md_begin mmix_md_begin
3c3bdf30 NC	56
ff1e783f	57	extern void mmix_md_end (void);
3c3bdf30 NC	58	#define md_end mmix_md_end
	59
	60	extern int mmix_current_location \
ff1e783f HPN	61	(void (fn) (expressionS ), expressionS *);
ff1e783f HPN	62	extern int mmix_parse_predefined_name (char , expressionS );
3c3bdf30 NC	63
	64	extern char *mmix_current_prefix;
	65
	66	/* A bit ugly, since we "know" that there's a static function
	67	current_location that does what we want. We also strip off a leading
	68	':' in another ugly way.
	69
	70	The [DVWIOUZX]_Handler symbols are provided when-used. */
	71
	72	extern int mmix_gnu_syntax;
9497f5ac	73	#define md_parse_name(name, exp, mode, cpos) \
3c3bdf30 NC	74	(! mmix_gnu_syntax \
	75	&& (name[0] == '@' \
	76	? (! is_part_of_name (name[1]) \
	77	&& mmix_current_location (current_location, exp)) \
973eb340	78	: ((name[0] == ':' \|\| ISUPPER (name[0])) \
3c3bdf30 NC	79	&& mmix_parse_predefined_name (name, exp))))
3c3bdf30 NC	80
ff1e783f	81	extern char mmix_prefix_name (char );
3c3bdf30 NC	82
	83	/* We implement when creating a symbol, we also need to strip a ':' or
	84	prepend a prefix. */
	85	#define tc_canonicalize_symbol_name(x) \
	86	(mmix_current_prefix == NULL && (x)[0] != ':' ? (x) : mmix_prefix_name (x))
	87
	88	#define md_undefined_symbol(x) NULL
	89
ff1e783f	90	extern void mmix_fb_label (expressionS *);
3c3bdf30 NC	91
	92	/* Since integer_constant is local to expr.c, we have to make this a
	93	macro. FIXME: Do it cleaner. */
	94	#define md_operand(exp) \
a1b6236b	95	do \
3c3bdf30	96	{ \
a1b6236b KH	97	if (input_line_pointer[0] == '#') \
	98	{ \
	99	input_line_pointer++; \
	100	integer_constant (16, (exp)); \
	101	} \
	102	else if (input_line_pointer[0] == '&' \
	103	&& input_line_pointer[1] != '&') \
	104	as_bad (_("`&' serial number operator is not supported")); \
	105	else \
	106	mmix_fb_label (exp); \
3c3bdf30	107	} \
a1b6236b	108	while (0)
3c3bdf30 NC	109
	110	/* Gas dislikes the 2ADD, 8ADD etc. insns, so we have to assemble them in
	111	the error-recovery loop. Hopefully there are no significant
	112	differences. Also, space on a line isn't gracefully handled. */
ff1e783f	113	extern int mmix_assemble_return_nonzero (char *);
3c3bdf30 NC	114	#define tc_unrecognized_line(c) \
	115	((c) == ' ' \
	116	\|\| (((c) == '1' \|\| (c) == '2' \|\| (c) == '4' \|\| (c) == '8') \
	117	&& mmix_assemble_return_nonzero (input_line_pointer - 1)))
	118
	119	#define md_number_to_chars number_to_chars_bigendian
	120
	121	#define WORKING_DOT_WORD
	122
	123	extern const struct relax_type mmix_relax_table[];
	124	#define TC_GENERIC_RELAX_TABLE mmix_relax_table
	125
88fc725d	126	/* We use the relax table for everything except the GREG frags and PUSHJ. */
ff1e783f	127	extern long mmix_md_relax_frag (segT, fragS *, long);
3c3bdf30 NC	128	#define md_relax_frag mmix_md_relax_frag
3c3bdf30 NC	129
a161fe53 AM	130	#define tc_fix_adjustable(FIX) \
	131	(((FIX)->fx_addsy == NULL \
	132	\|\| S_GET_SEGMENT ((FIX)->fx_addsy) != reg_section) \
	133	&& (FIX)->fx_r_type != BFD_RELOC_VTABLE_INHERIT \
	134	&& (FIX)->fx_r_type != BFD_RELOC_VTABLE_ENTRY \
	135	&& (FIX)->fx_r_type != BFD_RELOC_MMIX_LOCAL)
3c3bdf30 NC	136
	137	/* Adjust symbols which are registers. */
	138	#define tc_adjust_symtab() mmix_adjust_symtab ()
ff1e783f	139	extern void mmix_adjust_symtab (void);
3c3bdf30	140
a161fe53	141	/* Here's where we make all symbols global, when so requested.
3c3bdf30 NC	142	We must avoid doing that for expression symbols or section symbols,
	143	though. */
	144	extern int mmix_globalize_symbols;
a1b6236b KH	145	#define tc_frob_symbol(sym, punt) \
	146	do \
	147	{ \
a161fe53 AM	148	if (S_GET_SEGMENT (sym) == reg_section) \
	149	{ \
	150	if (S_GET_NAME (sym)[0] != '$' \
	151	&& S_GET_VALUE (sym) < 256) \
	152	{ \
	153	if (mmix_globalize_symbols) \
	154	S_SET_EXTERNAL (sym); \
	155	else \
	156	symbol_mark_used_in_reloc (sym); \
	157	} \
	158	} \
	159	else if (mmix_globalize_symbols \
	160	&& ! symbol_section_p (sym) \
	161	&& sym != section_symbol (absolute_section) \
	162	&& ! S_IS_LOCAL (sym)) \
a1b6236b KH	163	S_SET_EXTERNAL (sym); \
	164	} \
	165	while (0)
3c3bdf30	166
a161fe53 AM	167	/* No shared lib support, so we don't need to ensure externally
	168	visible symbols can be overridden. */
	169	#define EXTERN_FORCE_RELOC 0
	170
3c3bdf30 NC	171	/* When relaxing, we need to emit various relocs we otherwise wouldn't. */
3c3bdf30 NC	172	#define TC_FORCE_RELOCATION(fix) mmix_force_relocation (fix)
ff1e783f	173	extern int mmix_force_relocation (struct fix *);
3c3bdf30 NC	174
3c3bdf30 NC	175	/* Call md_pcrel_from_section(), not md_pcrel_from(). */
a161fe53	176	#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC)
ff1e783f	177	extern long md_pcrel_from_section (struct fix *, segT);
3c3bdf30	178
3c3bdf30 NC	179	#define md_section_align(seg, size) (size)
	180
	181	#define LISTING_HEADER "GAS for MMIX"
	182
	183	/* The default of 4 means Bcc expansion looks like it's missing a line. */
	184	#define LISTING_LHS_CONT_LINES 5
	185
	186	extern fragS *mmix_opcode_frag;
	187	#define TC_FRAG_TYPE fragS *
	188	#define TC_FRAG_INIT(frag) (frag)->tc_frag_data = mmix_opcode_frag
	189
	190	/* We need to associate each section symbol with a list of GREGs defined
	191	for that section/segment and sorted on offset, between the point where
	192	all symbols have been evaluated and all frags mapped, and when the
	193	fixups are done and relocs are output. Similarly for each unknown
	194	symbol. */
ff1e783f	195	extern void mmix_frob_file (void);
a161fe53	196	#define tc_frob_file_before_fix mmix_frob_file
3c3bdf30 NC	197
	198	/* Used by mmix_frob_file. Hangs on section symbols and unknown symbols. */
	199	struct mmix_symbol_gregs;
	200	#define TC_SYMFIELD_TYPE struct mmix_symbol_gregs *
	201
88fc725d HPN	202	/* Used by relaxation, counting maximum needed PUSHJ stubs for a section. */
	203	struct mmix_segment_info_type
	204	{
	205	/* We only need to keep track of the last stubbable frag because
	206	there's no less hackish way to keep track of different relaxation
	207	rounds. */
	208	fragS *last_stubfrag;
	209	bfd_size_type nstubs;
	210	};
	211	#define TC_SEGMENT_INFO_TYPE struct mmix_segment_info_type
	212
ff1e783f	213	extern void mmix_md_elf_section_change_hook (void);
3c3bdf30 NC	214	#define md_elf_section_change_hook mmix_md_elf_section_change_hook
3c3bdf30 NC	215
ff1e783f	216	extern void mmix_md_do_align (int, char *, int, int);
3c3bdf30 NC	217	#define md_do_align(n, fill, len, max, label) \
	218	mmix_md_do_align (n, fill, len, max)
	219
	220	/* Each insn is a tetrabyte (4 bytes) long, but if there are BYTE
	221	sequences sprinkled in, we can get unaligned DWARF2 offsets, so let's
	222	explicitly say one byte. */
	223	#define DWARF2_LINE_MIN_INSN_LENGTH 1
d31f0f6d AM	224
	225	/* This target is buggy, and sets fix size too large. */
	226	#define TC_FX_SIZE_SLACK(FIX) 6