/* Definitions of target machine for GNU compiler.  Iris version 6.
   Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc.

This file is part of GNU CC.

GNU CC 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 2, or (at your option)
any later version.

GNU CC 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 GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Irix 6 uses DWARF.  */
#define DWARF_DEBUGGING_INFO
#define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG

/* Default to -mips4.  */
#define TARGET_DEFAULT MASK_ABICALLS|MASK_FLOAT64|MASK_64BIT
#define MIPS_ISA_DEFAULT 4
#define MULTILIB_DEFAULTS { "EB", "mips4" }

#include "mips/iris5gas.h"
#include "mips/abi64.h"

/* The Irix 6.0.1 assembler doesn't like labels in the text section, so
   just avoid emitting them.  */
#define ASM_IDENTIFY_GCC
#define ASM_IDENTIFY_LANGUAGE

/* Irix 5 stuff that we don't need for Irix 6.  */
#undef ASM_OUTPUT_UNDEF_FUNCTION
#undef ASM_OUTPUT_EXTERNAL_LIBCALL
#undef ASM_DECLARE_FUNCTION_SIZE

/* Stuff we need for Irix 6 that isn't in Irix 5.  */

#undef SET_ASM_OP	/* Has no equivalent.  See ASM_OUTPUT_DEF below.  */

/* This is how to equate one symbol to another symbol.  The syntax used is
   `SYM1=SYM2'.  Note that this is different from the way equates are done
   with most svr4 assemblers, where the syntax is `.set SYM1,SYM2'.  */

#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)				\
 do {	fprintf ((FILE), "\t");						\
	assemble_name (FILE, LABEL1);					\
	fprintf (FILE, " = ");						\
	assemble_name (FILE, LABEL2);					\
	fprintf (FILE, "\n");						\
  } while (0)

#define POPSECTION_ASM_OP	".popsection"

#define DEBUG_SECTION		".debug,1,0,0,1"
#define LINE_SECTION		".line,1,0,0,1"
#define SFNAMES_SECTION		".debug_sfnames,1,0,0,1"
#define SRCINFO_SECTION		".debug_srcinfo,1,0,0,1"
#define MACINFO_SECTION		".debug_macinfo,1,0,0,1"
#define PUBNAMES_SECTION	".debug_pubnames,1,0,0,1"
#define ARANGES_SECTION		".debug_aranges,1,0,0,1"

#undef ASM_SPEC
#if ((TARGET_CPU_DEFAULT | TARGET_DEFAULT) & MASK_GAS) != 0
/* GAS */
#define ASM_SPEC "\
%{mmips-as: \
	%{!.s:-nocpp} %{.s: %{cpp} %{nocpp}} \
	%{pipe: %e-pipe is not supported.} \
	%{K}} \
%{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} %{mips4} %{v} \
%{noasmopt:-O0} \
%{!noasmopt:%{O:-O2} %{O1:-O2} %{O2:-O2} %{O3:-O3}} \
%{g} %{g0} %{g1} %{g2} %{g3} \
%{ggdb:-g} %{ggdb0:-g0} %{ggdb1:-g1} %{ggdb2:-g2} %{ggdb3:-g3} \
%{gstabs:-g} %{gstabs0:-g0} %{gstabs1:-g1} %{gstabs2:-g2} %{gstabs3:-g3} \
%{gstabs+:-g} %{gstabs+0:-g0} %{gstabs+1:-g1} %{gstabs+2:-g2} %{gstabs+3:-g3} \
%{gcoff:-g} %{gcoff0:-g0} %{gcoff1:-g1} %{gcoff2:-g2} %{gcoff3:-g3} \
%{membedded-pic}"

#else
/* not GAS */
/* Must pass -g0 to the assembler, otherwise it may overwrite our
   debug info with its own debug info. */
/* Must pass -show instead of -v.  */
/* Must pass -G 0 to the assembler, otherwise we may get warnings about
   GOT overflow.  */
#define ASM_SPEC "\
%{!mgas: \
	%{!.s:-nocpp} %{.s: %{cpp} %{nocpp}} \
	%{pipe: %e-pipe is not supported.} \
	%{K}} \
%{G*} %{EB} %{EL} %{v:-show} \
%{mips1} %{mips2} %{mips3} %{mips4} \
%{!mips1: %{!mips2: %{!mips3: %{!mips4: -mips4}}}} \
%{noasmopt:-O0} %{!noasmopt:%{O:-O2} %{O1:-O2} %{O2:-O2} %{O3:-O3}} \
-g0 -G 0 %{membedded-pic}"

#endif

/* Stuff for constructors.  Start here.  */

/* The assembler now accepts .section pseudo-ops, but it does not allow
   one to change the section in the middle of a function.  crtstuff relies
   on this hack, and thus crtstuff won't work here.  So, we do init and
   fini sections exactly the same way as they are done for Irix 5, and
   we ifdef out the ASM_OUTPUT_{CON,DE}STRUCTOR macros below.  */

#define CONST_SECTION_ASM_OP_32	"\t.rdata"
#define CONST_SECTION_ASM_OP_64	".section\t.rodata"
#define CTORS_SECTION_ASM_OP	".section\t.ctors,1,2,0,4"
#define DTORS_SECTION_ASM_OP	".section\t.dtors,1,2,0,4"

/* This is the pseudo-op used to generate a 32-bit word of data with a
   specific value in some section.  This is the same for all known svr4
   assemblers.  */

#define INT_ASM_OP		".word"

/* A default list of other sections which we might be "in" at any given
   time.  For targets that use additional sections (e.g. .tdesc) you
   should override this definition in the target-specific file which
   includes this file.  */

#undef EXTRA_SECTIONS
#define EXTRA_SECTIONS in_sdata, in_rdata, in_const, in_ctors, in_dtors

/* A default list of extra section function definitions.  For targets
   that use additional sections (e.g. .tdesc) you should override this
   definition in the target-specific file which includes this file.  */

/* ??? rdata_section is now same as svr4 const_section.  */

#undef EXTRA_SECTION_FUNCTIONS
#define EXTRA_SECTION_FUNCTIONS						\
void									\
sdata_section ()							\
{									\
  if (in_section != in_sdata)						\
    {									\
      fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP);		\
      in_section = in_sdata;						\
    }									\
}									\
									\
void									\
rdata_section ()							\
{									\
  if (in_section != in_rdata)						\
    {									\
      if (mips_isa >= 3)						\
	fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP_64);	\
      else								\
	fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP_32);	\
      in_section = in_rdata;						\
    }									\
}									\
  CTORS_SECTION_FUNCTION						\
  DTORS_SECTION_FUNCTION

#define CTORS_SECTION_FUNCTION						\
void									\
ctors_section ()							\
{									\
  if (in_section != in_ctors)						\
    {									\
      fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP);		\
      in_section = in_ctors;						\
    }									\
}

#define DTORS_SECTION_FUNCTION						\
void									\
dtors_section ()							\
{									\
  if (in_section != in_dtors)						\
    {									\
      fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP);		\
      in_section = in_dtors;						\
    }									\
}

#if 0

/* A C statement (sans semicolon) to output an element in the table of
   global constructors.  */
#define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME)				\
  do {									\
    ctors_section ();							\
    fprintf (FILE, "\t%s\t ", INT_ASM_OP);				\
    assemble_name (FILE, NAME);						\
    fprintf (FILE, "\n");						\
  } while (0)

/* A C statement (sans semicolon) to output an element in the table of
   global destructors.  */
#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME)       				\
  do {									\
    dtors_section ();                   				\
    fprintf (FILE, "\t%s\t ", INT_ASM_OP);				\
    assemble_name (FILE, NAME);              				\
    fprintf (FILE, "\n");						\
  } while (0)

#endif

/* Stuff for constructors.  End here.  */

/* ??? Perhaps just include svr4.h in this file?  */

/* ??? SGI assembler may core dump when compiling with -g.
   Sometimes as succeeds, but then we get a linker error. (cmds.c in 072.sc)
   Getting rid of .file solves both problems.  */
#undef ASM_OUTPUT_FILENAME
#define ASM_OUTPUT_FILENAME(STREAM, NUM_SOURCE_FILENAMES, NAME) \
do								\
  {								\
    fprintf (STREAM, "\t#.file\t%d ", NUM_SOURCE_FILENAMES);	\
    output_quoted_string (STREAM, NAME);			\
    fputs ("\n", STREAM);					\
  }								\
while (0)

/* ??? SGI assembler gives warning whenever .lcomm is used.  */
#undef ASM_OUTPUT_LOCAL
#define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN)	\
do								\
  {								\
    if (mips_isa >= 3)						\
      {								\
	fputs ("\t.section\t.bss\n", STREAM);			\
	ASM_DECLARE_OBJECT_NAME (STREAM, NAME, 0);		\
	ASM_OUTPUT_ALIGN (STREAM, floor_log2 (ALIGN / BITS_PER_UNIT));	\
	ASM_OUTPUT_SKIP (STREAM, SIZE);				\
	fprintf (STREAM, "\t%s\n", POPSECTION_ASM_OP);		\
      }								\
    else							\
      mips_declare_object (STREAM, NAME, "\n\t.lcomm\t", ",%u\n", (SIZE)); \
  }								\
while (0)

#undef ASM_OUTPUT_INTERNAL_LABEL
#define ASM_OUTPUT_INTERNAL_LABEL(STREAM,PREFIX,NUM)			\
  fprintf (STREAM, ".%s%d:\n", PREFIX, NUM)

/* This is how to store into the string LABEL
   the symbol_ref name of an internal numbered label where
   PREFIX is the class of label and NUM is the number within the class.
   This is suitable for output with `assemble_name'.  */

#undef ASM_GENERATE_INTERNAL_LABEL
#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)			\
  sprintf (LABEL, "*.%s%d", PREFIX, NUM)

#undef STARTFILE_SPEC
/* Profiling is supported via libprof1.a not -lc_p as in Irix 3.  */
#undef STARTFILE_SPEC
#define STARTFILE_SPEC \
  "%{mips1:%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s libprof1.a%s}%{!p:crt1.o%s}}} \
   %{mips2:%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s libprof1.a%s}%{!p:crt1.o%s}}} \
   %{!mips1:%{!mips2:%{pg:/usr/lib64/gcrt1.o}%{!pg:%{p:/usr/lib64/mcrt1.o /usr/lib64/libprof1.a}%{!p:/usr/lib64/crt1.o}}}}"

#undef LIB_SPEC
#define LIB_SPEC "%{p:libprof1.a%s}%{pg:libprof1.a%s} -lc"

#undef ENDFILE_SPEC
#define ENDFILE_SPEC \
  "%{mips1:crtn.o%s}%{mips2:crtn.o%s}%{!mips1:%{!mips2:/usr/lib64/crtn.o}}"

#undef LINK_SPEC
#define LINK_SPEC "\
%{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} %{mips4} \
%{bestGnum} %{shared} %{non_shared} \
%{call_shared} %{no_archive} %{exact_version} \
%{!shared: %{!non_shared: %{!call_shared: -call_shared -no_unresolved}}} \
%{rpath} \
-_SYSTYPE_SVR4"

/* ??? Debugging does not work.  We get many assembler core dumps,
   and even some linker core dumps.  */
#undef DBX_DEBUGGING_INFO
#undef SDB_DEBUGGING_INFO
#undef MIPS_DEBUGGING_INFO
#undef DWARF_DEBUGGING_INFO
#undef PREFERRED_DEBUGGING_TYPE
