/* Definitions of target machine GNU compiler. IA64-VMS version.
   Copyright (C) 2003-2010 Free Software Foundation, Inc.
   Contributed by Douglas B Rupp (rupp@gnat.com).

This file is part of GCC.

GCC 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.

GCC 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 GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */

#define TARGET_OBJECT_SUFFIX ".obj"
#define TARGET_EXECUTABLE_SUFFIX ".exe"

#define OBJECT_FORMAT_ELF

#define TARGET_OS_CPP_BUILTINS()		\
    do {					\
	builtin_define_std ("vms");		\
	builtin_define_std ("VMS");		\
	builtin_define ("__IA64");		\
	builtin_assert ("system=vms");		\
	builtin_define ("__IEEE_FLOAT");	\
    } while (0)

/* By default, allow $ to be part of an identifier.  */
#define DOLLARS_IN_IDENTIFIERS 2

#undef TARGET_ABI_OPEN_VMS
#define TARGET_ABI_OPEN_VMS 1

#undef TARGET_NAME   
#define TARGET_NAME "OpenVMS/IA64"
#undef TARGET_VERSION
#define TARGET_VERSION fprintf (stderr, " (%s)", TARGET_NAME);           

/* Need .debug_line info generated from gcc and gas.  */
#undef TARGET_DEFAULT
#define TARGET_DEFAULT (MASK_DWARF2_ASM | MASK_GNU_AS)

#define VMS_DEBUG_MAIN_POINTER "TRANSFER$BREAK$GO"

/* "long" is 32 bits, but 64 bits for Ada.  */
#undef LONG_TYPE_SIZE
#define LONG_TYPE_SIZE 32
#define ADA_LONG_TYPE_SIZE 64

/* Pointer is 32 bits but the hardware has 64-bit addresses, sign extended.  */
#undef POINTER_SIZE
#define POINTER_SIZE 32
#define POINTERS_EXTEND_UNSIGNED 0

#undef MAX_OFILE_ALIGNMENT
#define MAX_OFILE_ALIGNMENT 524288  /* 8 x 2^16 by DEC Ada Test CD40VRA */

/* Widest floating-point type efficiently supported by hardware and OS.  */
#undef WIDEST_HARDWARE_FP_SIZE
#define WIDEST_HARDWARE_FP_SIZE 64

/* The structure return address arrives as an "argument" on VMS.  */
#undef PCC_STATIC_STRUCT_RETURN

/* Turn on VMS specific Dwarf2 features.  */
#define VMS_DEBUGGING_INFO 1

#define ASM_OUTPUT_DWARF_VMS_DELTA(FILE,SIZE,LABEL1,LABEL2) \
do {                                          \
  fprintf (FILE, "\tdata4.ua\t@slotcount(");  \
  assemble_name (FILE, LABEL1);               \
  fprintf (FILE, "-");                        \
  assemble_name (FILE, LABEL2);               \
  fprintf (FILE, ")");                        \
} while (0)

#undef STARTFILE_SPEC
#define STARTFILE_SPEC \
"%{!shared:%{mvms-return-codes:vcrt0.o%s} %{!mvms-return-codes:pcrt0.o%s} \
    crtbegin.o%s} \
 %{!static:%{shared:crtinitS.o%s crtbeginS.o%s}}"

#undef ENDFILE_SPEC
#define ENDFILE_SPEC \
"%{!shared:crtend.o%s} %{!static:%{shared:crtendS.o%s}}"

#define LINK_GCC_C_SEQUENCE_SPEC "%G"

#undef LINK_SPEC
#define LINK_SPEC "%{g*} %{map} %{save-temps} %{shared} %{v}"

#undef LIB_SPEC
#define LIB_SPEC ""

#undef ASM_SPEC
#define ASM_SPEC \
"%{mno-gnu-as:-N so -N vms_upcase -W DVLoc_off} %{mconstant-gp:-M const_gp} \
 %{mauto-pic:-M no_plabel} %{source-listing:-ahdl=%b.lis}"

#undef ASM_OUTPUT_EXTERNAL_LIBCALL
#define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN)			\
do {								\
  (*targetm.asm_out.globalize_label) (FILE, XSTR (FUN, 0));	\
  ASM_OUTPUT_TYPE_DIRECTIVE (FILE, XSTR (FUN, 0), "function");	\
} while (0)

/* Set the function to change the names of the division and modulus
   functions.   */
#undef TARGET_INIT_LIBFUNCS
#define TARGET_INIT_LIBFUNCS ia64_vms_init_libfuncs

#define NAME__MAIN "__gccmain"
#define SYMBOL__MAIN __gccmain

#define CTOR_LIST_BEGIN asm (".global\tLIB$INITIALIZE#\n");                  \
STATIC func_ptr __CTOR_LIST__[1]                                             \
  __attribute__ ((__unused__, section(".ctors"), aligned(sizeof(func_ptr)))) \
  = { (func_ptr) (-1) };

#undef INIT_SECTION_ASM_OP
#define INIT_SECTION_ASM_OP ".section\tLIB$INITIALIZE#,\"a\",@progbits"

#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC)      \
  asm (SECTION_OP "\n\tdata4 @fptr(" #FUNC"#)\n");      \
  FORCE_CODE_SECTION_ALIGN                            \
  asm (TEXT_SECTION_ASM_OP);

#undef FINI_SECTION_ASM_OP

/* Maybe same as HPUX?  Needs to be checked.  */
#define JMP_BUF_SIZE  (8 * 76)

typedef struct crtl_name_spec
{
  const char *const name;
  const char *deccname;
  int referenced;
} crtl_name_spec;

#include "config/vms/vms-crtl.h"

/* Alias CRTL names to 32/64bit DECCRTL functions.
   Fixme: This should do a binary search.  */
#define DO_CRTL_NAMES                                                      \
  do                                                                       \
    {                                                                      \
      int i;                                                               \
      static crtl_name_spec vms_crtl_names[] = CRTL_NAMES;                 \
      static int malloc64_init = 0;                                        \
                                                                           \
      if ((malloc64_init == 0) && TARGET_MALLOC64)                         \
	{                                                                  \
          for (i=0; vms_crtl_names [i].name; i++)                          \
            {                                                              \
	      if (strcmp ("calloc", vms_crtl_names [i].name) == 0)         \
                vms_crtl_names [i].deccname = "decc$_calloc64";            \
              else                                                         \
	      if (strcmp ("malloc", vms_crtl_names [i].name) == 0)         \
                vms_crtl_names [i].deccname = "decc$_malloc64";            \
              else                                                         \
	      if (strcmp ("realloc", vms_crtl_names [i].name) == 0)        \
                vms_crtl_names [i].deccname = "decc$_realloc64";           \
              else                                                         \
	      if (strcmp ("strdup", vms_crtl_names [i].name) == 0)         \
                vms_crtl_names [i].deccname = "decc$_strdup64";            \
	    }                                                              \
            malloc64_init = 1;                                             \
        }                                                                  \
      for (i=0; vms_crtl_names [i].name; i++)                              \
	if (!vms_crtl_names [i].referenced &&                              \
	    (strcmp (name, vms_crtl_names [i].name) == 0))                 \
	  {                                                                \
	    fprintf (file, "\t.alias %s, \"%s\"\n",                        \
		     name, vms_crtl_names [i].deccname);                   \
	    vms_crtl_names [i].referenced = 1;                             \
	  }                                                                \
    } while (0)

#undef SUBTARGET_OPTIMIZATION_OPTIONS
#define SUBTARGET_OPTIMIZATION_OPTIONS			\
  { OPT_LEVELS_ALL, OPT_fmerge_constants, NULL, 0 }

/* Define this to be nonzero if static stack checking is supported.  */
#define STACK_CHECK_STATIC_BUILTIN 1

#define MD_UNWIND_SUPPORT "config/ia64/vms-unwind.h"

#define UNW_IVMS_MODE(HEADER) (((HEADER) >> 44) & 0x3L)
#define MD_UNW_COMPATIBLE_PERSONALITY_P(HEADER) (!UNW_IVMS_MODE (HEADER))

/* Minimum amount of stack required to recover from an anticipated stack
   overflow detection.  The default value conveys an estimate of the amount
   of stack required to propagate an exception.  */
#define STACK_CHECK_PROTECT (24 * 1024)

#undef ASM_OUTPUT_ALIGNED_DECL_COMMON
#define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
  ia64_vms_output_aligned_decl_common (FILE, DECL, NAME, SIZE, ALIGN)

#undef TARGET_VALID_POINTER_MODE
#define TARGET_VALID_POINTER_MODE ia64_vms_valid_pointer_mode

#undef TARGET_ASM_NAMED_SECTION
#define TARGET_ASM_NAMED_SECTION ia64_vms_elf_asm_named_section