[thirdparty/gcc.git] / gcc / config / alpha / vms.h

/* Output variables, constants and external declarations, for GNU compiler.
   Copyright (C) 1996, 1997, 1998, 2000, 2001, 2002, 2004, 2005, 2007, 2008,
   2009
   Free Software Foundation, Inc.

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"

/* Alpha/VMS object format is not really Elf, but this makes compiling
   crtstuff.c and dealing with shared library initialization much easier.  */
#define OBJECT_FORMAT_ELF

/* This enables certain macros in alpha.h, which will make an indirect
   reference to an external symbol an invalid address.  This needs to be
   defined before we include alpha.h, since it determines which macros
   are used for GO_IF_*.  */

#define NO_EXTERNAL_INDIRECT_ADDRESS

#define TARGET_OS_CPP_BUILTINS()		\
    do {					\
	builtin_define_std ("vms");		\
	builtin_define_std ("VMS");		\
	builtin_define ("__ALPHA");		\
	builtin_assert ("system=vms");		\
	if (TARGET_FLOAT_VAX)			\
	  builtin_define ("__G_FLOAT");		\
	else					\
	  builtin_define ("__IEEE_FLOAT");	\
    } while (0)

#undef TARGET_DEFAULT
#define TARGET_DEFAULT (MASK_FPREGS|MASK_GAS)
#undef TARGET_ABI_OPEN_VMS
#define TARGET_ABI_OPEN_VMS 1

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

#define VMS_DEBUG_MAIN_POINTER "TRANSFER$BREAK$GO"

#undef PCC_STATIC_STRUCT_RETURN

/* "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

#define HANDLE_SYSV_PRAGMA 1

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

/* The maximum alignment 'malloc' honors.  */
#undef  MALLOC_ALIGNMENT
#define MALLOC_ALIGNMENT ((TARGET_MALLOC64 ? 16 : 8) * BITS_PER_UNIT)

#undef FIXED_REGISTERS
#define FIXED_REGISTERS  \
 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }

#undef CALL_USED_REGISTERS
#define CALL_USED_REGISTERS  \
 {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
  1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }

/* List the order in which to allocate registers.  Each register must be
   listed once, even those in FIXED_REGISTERS.

   We allocate in the following order:
   $f1			(nonsaved floating-point register)
   $f10-$f15		(likewise)
   $f22-$f30		(likewise)
   $f21-$f16		(likewise, but input args)
   $f0			(nonsaved, but return value)
   $f2-$f9		(saved floating-point registers)
   $1			(nonsaved integer registers)
   $22-$25		(likewise)
   $28			(likewise)
   $0			(likewise, but return value)
   $21-$16		(likewise, but input args)
   $27			(procedure value in OSF, nonsaved in NT)
   $2-$8		(saved integer registers)
   $9-$14		(saved integer registers)
   $26			(return PC)
   $15			(frame pointer)
   $29			(global pointer)
   $30, $31, $f31	(stack pointer and always zero/ap & fp)  */

#undef REG_ALLOC_ORDER
#define REG_ALLOC_ORDER		\
  {33,					\
   42, 43, 44, 45, 46, 47,		\
   54, 55, 56, 57, 58, 59, 60, 61, 62,	\
   53, 52, 51, 50, 49, 48,		\
   32,					\
   34, 35, 36, 37, 38, 39, 40, 41,	\
   1,					\
   22, 23, 24, 25,			\
   28,					\
   0,					\
   21, 20, 19, 18, 17, 16,		\
   27,					\
   2, 3, 4, 5, 6, 7, 8,			\
   9, 10, 11, 12, 13, 14,		\
   26,					\
   15,					\
   29,					\
   30, 31, 63 }

#undef HARD_FRAME_POINTER_REGNUM
#define HARD_FRAME_POINTER_REGNUM 29

/* Define registers used by the epilogue and return instruction.  */
#undef EPILOGUE_USES
#define EPILOGUE_USES(REGNO)    ((REGNO) == 26 || (REGNO) == 29)

#undef CAN_ELIMINATE
#define CAN_ELIMINATE(FROM, TO)  \
  (alpha_vms_can_eliminate ((FROM), (TO)))

#undef INITIAL_ELIMINATION_OFFSET
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)			\
  ((OFFSET) = alpha_vms_initial_elimination_offset(FROM, TO))

\f
/* Define a data type for recording info about an argument list
   during the scan of that argument list.  This data type should
   hold all necessary information about the function itself
   and about the args processed so far, enough to enable macros
   such as FUNCTION_ARG to determine where the next arg should go.

   On Alpha/VMS, this is a structure that contains the number of
   arguments and, for each argument, the datatype of that argument.

   The number of arguments is a number of words of arguments scanned so far.
   Thus 6 or more means all following args should go on the stack.  */

enum avms_arg_type {I64, FF, FD, FG, FS, FT};
typedef struct {int num_args; enum avms_arg_type atypes[6];} avms_arg_info;

#undef CUMULATIVE_ARGS
#define CUMULATIVE_ARGS avms_arg_info

/* Initialize a variable CUM of type CUMULATIVE_ARGS
   for a call to a function whose data type is FNTYPE.
   For a library call, FNTYPE is 0.  */

#undef INIT_CUMULATIVE_ARGS
#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
  (CUM).num_args = 0;						\
  (CUM).atypes[0] = (CUM).atypes[1] = (CUM).atypes[2] = I64;	\
  (CUM).atypes[3] = (CUM).atypes[4] = (CUM).atypes[5] = I64;

#undef FUNCTION_ARG_ADVANCE
#define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)			\
  if (targetm.calls.must_pass_in_stack (MODE, TYPE))			\
    (CUM).num_args += 6;						\
  else									\
    {									\
      if ((CUM).num_args < 6)						\
        (CUM).atypes[(CUM).num_args] = alpha_arg_type (MODE);		\
									\
     (CUM).num_args += ALPHA_ARG_SIZE (MODE, TYPE, NAMED);		\
    }

/* ABI has stack checking, but it's broken.  */
#undef STACK_CHECK_BUILTIN
#define STACK_CHECK_BUILTIN 0

#undef  ASM_WEAKEN_LABEL
#define ASM_WEAKEN_LABEL(FILE, NAME)                            \
   do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME);  \
        fputc ('\n', FILE); } while (0)

#define READONLY_DATA_SECTION_ASM_OP "\t.rdata"
#define CTORS_SECTION_ASM_OP "\t.ctors"
#define DTORS_SECTION_ASM_OP "\t.dtors"
#define SDATA_SECTION_ASM_OP "\t.sdata"
#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC)              \
   asm (SECTION_OP "\n\t.long " #FUNC"\n");

#undef ASM_OUTPUT_ADDR_DIFF_ELT
#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) gcc_unreachable ()

#undef ASM_OUTPUT_ADDR_VEC_ELT
#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
  fprintf (FILE, "\t.quad $L%d\n", (VALUE))

#undef CASE_VECTOR_MODE
#define CASE_VECTOR_MODE DImode
#undef CASE_VECTOR_PC_RELATIVE

#undef ASM_OUTPUT_CASE_LABEL
#define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN)	\
{ ASM_OUTPUT_ALIGN (FILE, 3); (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM); }

/* This says how to output assembler code to declare an                
   uninitialized external linkage data object.  */ 

#define COMMON_ASM_OP "\t.comm\t"

#undef ASM_OUTPUT_ALIGNED_DECL_COMMON
#define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
  vms_output_aligned_decl_common (FILE, DECL, NAME, SIZE, ALIGN)
\f
#undef TRAMPOLINE_TEMPLATE

/* Length in units of the trampoline for entering a nested function.  */

#undef TRAMPOLINE_SIZE
#define TRAMPOLINE_SIZE    32

/* The alignment of a trampoline, in bits.  */

#undef TRAMPOLINE_ALIGNMENT
#define TRAMPOLINE_ALIGNMENT  64

/* Emit RTL insns to initialize the variable parts of a trampoline.
   FNADDR is an RTX for the address of the function's pure code.
   CXT is an RTX for the static chain value for the function.  */

#undef INITIALIZE_TRAMPOLINE
#define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
  alpha_initialize_trampoline (TRAMP, FNADDR, CXT, 16, 24, -1)

/* Control how constructors and destructors are emitted.  */
#define TARGET_ASM_CONSTRUCTOR  vms_asm_out_constructor
#define TARGET_ASM_DESTRUCTOR   vms_asm_out_destructor

#undef SDB_DEBUGGING_INFO
#undef MIPS_DEBUGGING_INFO
#undef DBX_DEBUGGING_INFO

#define DWARF2_DEBUGGING_INFO 1
#define VMS_DEBUGGING_INFO 1

#define DWARF2_UNWIND_INFO 1

#undef EH_RETURN_HANDLER_RTX
#define EH_RETURN_HANDLER_RTX \
  gen_rtx_MEM (Pmode, plus_constant (stack_pointer_rtx, 8))

#define LINK_EH_SPEC "vms-dwarf2eh.o%s "
#define LINK_GCC_C_SEQUENCE_SPEC "%G"

#ifdef IN_LIBGCC2
/* Get the definition for MD_FALLBACK_FRAME_STATE_FOR from a separate
   file. This avoids having to recompile the world instead of libgcc only
   when changes to this macro are exercised.  */

#define MD_UNWIND_SUPPORT "config/alpha/vms-unwind.h"
#endif

#define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
  avms_asm_output_external (FILE, DECL, NAME)

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%s=%s\n",                        \
		     name, vms_crtl_names [i].deccname);                   \
	    vms_crtl_names [i].referenced = 1;                             \
	  }                                                                \
    } while (0)

/* This is how to output an assembler line
   that says to advance the location counter
   to a multiple of 2**LOG bytes.  */

#undef ASM_OUTPUT_ALIGN
#define ASM_OUTPUT_ALIGN(FILE,LOG)	\
    fprintf (FILE, "\t.align %d\n", LOG);

/* Switch into a generic section.  */
#define TARGET_ASM_NAMED_SECTION vms_asm_named_section

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

#undef PREFERRED_DEBUGGING_TYPE
#define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG

#define ASM_PN_FORMAT "%s___%lu"

/* ??? VMS uses different linkage.  */
#undef TARGET_ASM_OUTPUT_MI_THUNK

#undef ASM_SPEC
#undef ASM_FINAL_SPEC

/* The VMS convention is to always provide minimal debug info
   for a traceback unless specifically overridden.  Defaulting this here
   is a kludge.  */

#define OPTIMIZATION_OPTIONS(OPTIMIZE, OPTIMIZE_SIZE) \
{                                                  \
   write_symbols = VMS_DEBUG;                      \
   debug_info_level = (enum debug_info_level) 1;   \
}

/* Override traceback debug info on -g0.  */
#undef OVERRIDE_OPTIONS
#define OVERRIDE_OPTIONS                           \
{                                                  \
   if (write_symbols == NO_DEBUG)                  \
     debug_info_level = (enum debug_info_level) 0; \
   override_options ();                            \
}

/* Link with vms-dwarf2.o if -g (except -g0). This causes the
   VMS link to pull all the dwarf2 debug sections together.  */
#undef LINK_SPEC
#define LINK_SPEC "%{g:-g vms-dwarf2.o%s} %{g0} %{g1:-g1 vms-dwarf2.o%s} \
%{g2:-g2 vms-dwarf2.o%s} %{g3:-g3 vms-dwarf2.o%s} %{shared} %{v} %{map}"

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

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

#define NAME__MAIN "__gccmain"
#define SYMBOL__MAIN __gccmain

#define INIT_SECTION_ASM_OP "\t.section LIB$INITIALIZE,GBL,NOWRT"

#define LONGLONG_STANDALONE 1
Commit	Line	Data
16b61764	1	/* Output variables, constants and external declarations, for GNU compiler.
5ea8f977 DR	2	Copyright (C) 1996, 1997, 1998, 2000, 2001, 2002, 2004, 2005, 2007, 2008,
5ea8f977 DR	3	2009
16b61764 DR	4	Free Software Foundation, Inc.
16b61764 DR	5
7ec022b2	6	This file is part of GCC.
16b61764	7
7ec022b2	8	GCC is free software; you can redistribute it and/or modify
16b61764	9	it under the terms of the GNU General Public License as published by
2f83c7d6	10	the Free Software Foundation; either version 3, or (at your option)
16b61764 DR	11	any later version.
16b61764 DR	12
7ec022b2	13	GCC is distributed in the hope that it will be useful,
16b61764 DR	14	but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	GNU General Public License for more details.
	17
	18	You should have received a copy of the GNU General Public License
2f83c7d6 NC	19	along with GCC; see the file COPYING3. If not see
2f83c7d6 NC	20	<http://www.gnu.org/licenses/>. */
16b61764 DR	21
	22	#define TARGET_OBJECT_SUFFIX ".obj"
	23	#define TARGET_EXECUTABLE_SUFFIX ".exe"
	24
3bd1b109 DR	25	/* Alpha/VMS object format is not really Elf, but this makes compiling
	26	crtstuff.c and dealing with shared library initialization much easier. */
	27	#define OBJECT_FORMAT_ELF
	28
16b61764 DR	29	/* This enables certain macros in alpha.h, which will make an indirect
	30	reference to an external symbol an invalid address. This needs to be
	31	defined before we include alpha.h, since it determines which macros
	32	are used for GO_IF_. /
	33
	34	#define NO_EXTERNAL_INDIRECT_ADDRESS
	35
12a41c22 NB	36	#define TARGET_OS_CPP_BUILTINS() \
	37	do { \
	38	builtin_define_std ("vms"); \
	39	builtin_define_std ("VMS"); \
	40	builtin_define ("__ALPHA"); \
	41	builtin_assert ("system=vms"); \
e0322d5c NB	42	if (TARGET_FLOAT_VAX) \
	43	builtin_define ("__G_FLOAT"); \
	44	else \
	45	builtin_define ("__IEEE_FLOAT"); \
12a41c22	46	} while (0)
16b61764	47
16b61764	48	#undef TARGET_DEFAULT
8bea7f7c	49	#define TARGET_DEFAULT (MASK_FPREGS\|MASK_GAS)
16b61764 DR	50	#undef TARGET_ABI_OPEN_VMS
	51	#define TARGET_ABI_OPEN_VMS 1
	52
	53	#undef TARGET_NAME
	54	#define TARGET_NAME "OpenVMS/Alpha"
	55	#undef TARGET_VERSION
	56	#define TARGET_VERSION fprintf (stderr, " (%s)", TARGET_NAME);
	57
5ea8f977 DR	58	#define VMS_DEBUG_MAIN_POINTER "TRANSFER$BREAK$GO"
5ea8f977 DR	59
16b61764 DR	60	#undef PCC_STATIC_STRUCT_RETURN
	61
	62	/* "long" is 32 bits, but 64 bits for Ada. */
	63	#undef LONG_TYPE_SIZE
	64	#define LONG_TYPE_SIZE 32
	65	#define ADA_LONG_TYPE_SIZE 64
	66
	67	/* Pointer is 32 bits but the hardware has 64-bit addresses, sign extended. */
	68	#undef POINTER_SIZE
	69	#define POINTER_SIZE 32
	70	#define POINTERS_EXTEND_UNSIGNED 0
	71
c889a16f DR	72	#define HANDLE_SYSV_PRAGMA 1
c889a16f DR	73
16b61764 DR	74	#define MAX_OFILE_ALIGNMENT 524288 /* 8 x 2^16 by DEC Ada Test CD40VRA */
16b61764 DR	75
5e3fef6c DR	76	/* The maximum alignment 'malloc' honors. */
	77	#undef MALLOC_ALIGNMENT
	78	#define MALLOC_ALIGNMENT ((TARGET_MALLOC64 ? 16 : 8) * BITS_PER_UNIT)
	79
16b61764 DR	80	#undef FIXED_REGISTERS
	81	#define FIXED_REGISTERS \
	82	{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
	83	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
	84	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
	85	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }
	86
	87	#undef CALL_USED_REGISTERS
	88	#define CALL_USED_REGISTERS \
	89	{1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
	90	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
	91	1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
	92	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }
	93
	94	/* List the order in which to allocate registers. Each register must be
	95	listed once, even those in FIXED_REGISTERS.
	96
	97	We allocate in the following order:
	98	$f1 (nonsaved floating-point register)
	99	$f10-$f15 (likewise)
	100	$f22-$f30 (likewise)
	101	$f21-$f16 (likewise, but input args)
	102	$f0 (nonsaved, but return value)
	103	$f2-$f9 (saved floating-point registers)
	104	$1 (nonsaved integer registers)
	105	$22-$25 (likewise)
	106	$28 (likewise)
	107	$0 (likewise, but return value)
	108	$21-$16 (likewise, but input args)
	109	$27 (procedure value in OSF, nonsaved in NT)
	110	$2-$8 (saved integer registers)
	111	$9-$14 (saved integer registers)
	112	$26 (return PC)
	113	$15 (frame pointer)
	114	$29 (global pointer)
	115	$30, $31, $f31 (stack pointer and always zero/ap & fp) */
	116
	117	#undef REG_ALLOC_ORDER
	118	#define REG_ALLOC_ORDER \
	119	{33, \
	120	42, 43, 44, 45, 46, 47, \
	121	54, 55, 56, 57, 58, 59, 60, 61, 62, \
	122	53, 52, 51, 50, 49, 48, \
	123	32, \
	124	34, 35, 36, 37, 38, 39, 40, 41, \
	125	1, \
	126	22, 23, 24, 25, \
	127	28, \
	128	0, \
	129	21, 20, 19, 18, 17, 16, \
	130	27, \
	131	2, 3, 4, 5, 6, 7, 8, \
	132	9, 10, 11, 12, 13, 14, \
	133	26, \
	134	15, \
	135	29, \
	136	30, 31, 63 }
	137
	138	#undef HARD_FRAME_POINTER_REGNUM
	139	#define HARD_FRAME_POINTER_REGNUM 29
	140
	141	/* Define registers used by the epilogue and return instruction. */
	142	#undef EPILOGUE_USES
	143	#define EPILOGUE_USES(REGNO) ((REGNO) == 26 \|\| (REGNO) == 29)
144
145	#undef CAN_ELIMINATE
146	#define CAN_ELIMINATE(FROM, TO) \
1d3499d8	147	(alpha_vms_can_eliminate ((FROM), (TO)))
16b61764 DR	148
	149	#undef INITIAL_ELIMINATION_OFFSET
	150	#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1d3499d8 OH	151	((OFFSET) = alpha_vms_initial_elimination_offset(FROM, TO))
1d3499d8 OH	152
16b61764 DR	153	\f
	154	/* Define a data type for recording info about an argument list
	155	during the scan of that argument list. This data type should
	156	hold all necessary information about the function itself
	157	and about the args processed so far, enough to enable macros
	158	such as FUNCTION_ARG to determine where the next arg should go.
	159
	160	On Alpha/VMS, this is a structure that contains the number of
	161	arguments and, for each argument, the datatype of that argument.
	162
	163	The number of arguments is a number of words of arguments scanned so far.
	164	Thus 6 or more means all following args should go on the stack. */
	165
	166	enum avms_arg_type {I64, FF, FD, FG, FS, FT};
	167	typedef struct {int num_args; enum avms_arg_type atypes[6];} avms_arg_info;
	168
	169	#undef CUMULATIVE_ARGS
	170	#define CUMULATIVE_ARGS avms_arg_info
	171
	172	/* Initialize a variable CUM of type CUMULATIVE_ARGS
	173	for a call to a function whose data type is FNTYPE.
	174	For a library call, FNTYPE is 0. */
	175
	176	#undef INIT_CUMULATIVE_ARGS
0f6937fe	177	#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
16b61764 DR	178	(CUM).num_args = 0; \
	179	(CUM).atypes[0] = (CUM).atypes[1] = (CUM).atypes[2] = I64; \
	180	(CUM).atypes[3] = (CUM).atypes[4] = (CUM).atypes[5] = I64;
	181
	182	#undef FUNCTION_ARG_ADVANCE
	183	#define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
fe984136	184	if (targetm.calls.must_pass_in_stack (MODE, TYPE)) \
16b61764 DR	185	(CUM).num_args += 6; \
	186	else \
	187	{ \
	188	if ((CUM).num_args < 6) \
	189	(CUM).atypes[(CUM).num_args] = alpha_arg_type (MODE); \
	190	\
	191	(CUM).num_args += ALPHA_ARG_SIZE (MODE, TYPE, NAMED); \
	192	}
	193
16b61764 DR	194	/* ABI has stack checking, but it's broken. */
	195	#undef STACK_CHECK_BUILTIN
	196	#define STACK_CHECK_BUILTIN 0
	197
3bd1b109 DR	198	#undef ASM_WEAKEN_LABEL
	199	#define ASM_WEAKEN_LABEL(FILE, NAME) \
	200	do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
	201	fputc ('\n', FILE); } while (0)
	202
d48bc59a	203	#define READONLY_DATA_SECTION_ASM_OP "\t.rdata"
16b61764 DR	204	#define CTORS_SECTION_ASM_OP "\t.ctors"
16b61764 DR	205	#define DTORS_SECTION_ASM_OP "\t.dtors"
3bd1b109 DR	206	#define SDATA_SECTION_ASM_OP "\t.sdata"
	207	#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
	208	asm (SECTION_OP "\n\t.long " #FUNC"\n");
16b61764	209
16b61764	210	#undef ASM_OUTPUT_ADDR_DIFF_ELT
56daab84	211	#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) gcc_unreachable ()
16b61764 DR	212
	213	#undef ASM_OUTPUT_ADDR_VEC_ELT
	214	#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
	215	fprintf (FILE, "\t.quad $L%d\n", (VALUE))
	216
16b61764 DR	217	#undef CASE_VECTOR_MODE
	218	#define CASE_VECTOR_MODE DImode
	219	#undef CASE_VECTOR_PC_RELATIVE
	220
	221	#undef ASM_OUTPUT_CASE_LABEL
	222	#define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN) \
4977bab6	223	{ ASM_OUTPUT_ALIGN (FILE, 3); (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM); }
16b61764 DR	224
	225	/* This says how to output assembler code to declare an
	226	uninitialized external linkage data object. */
	227
	228	#define COMMON_ASM_OP "\t.comm\t"
	229
18fd5621 EB	230	#undef ASM_OUTPUT_ALIGNED_DECL_COMMON
	231	#define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
	232	vms_output_aligned_decl_common (FILE, DECL, NAME, SIZE, ALIGN)
16b61764	233	\f
16b61764	234	#undef TRAMPOLINE_TEMPLATE
16b61764 DR	235
	236	/* Length in units of the trampoline for entering a nested function. */
	237
	238	#undef TRAMPOLINE_SIZE
	239	#define TRAMPOLINE_SIZE 32
	240
	241	/* The alignment of a trampoline, in bits. */
	242
	243	#undef TRAMPOLINE_ALIGNMENT
	244	#define TRAMPOLINE_ALIGNMENT 64
	245
	246	/* Emit RTL insns to initialize the variable parts of a trampoline.
	247	FNADDR is an RTX for the address of the function's pure code.
	248	CXT is an RTX for the static chain value for the function. */
	249
	250	#undef INITIALIZE_TRAMPOLINE
	251	#define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
	252	alpha_initialize_trampoline (TRAMP, FNADDR, CXT, 16, 24, -1)
	253
	254	/* Control how constructors and destructors are emitted. */
	255	#define TARGET_ASM_CONSTRUCTOR vms_asm_out_constructor
	256	#define TARGET_ASM_DESTRUCTOR vms_asm_out_destructor
	257
	258	#undef SDB_DEBUGGING_INFO
	259	#undef MIPS_DEBUGGING_INFO
	260	#undef DBX_DEBUGGING_INFO
	261
23532de9 JT	262	#define DWARF2_DEBUGGING_INFO 1
23532de9 JT	263	#define VMS_DEBUGGING_INFO 1
16b61764 DR	264
	265	#define DWARF2_UNWIND_INFO 1
	266
	267	#undef EH_RETURN_HANDLER_RTX
	268	#define EH_RETURN_HANDLER_RTX \
	269	gen_rtx_MEM (Pmode, plus_constant (stack_pointer_rtx, 8))
	270
12300dad	271	#define LINK_EH_SPEC "vms-dwarf2eh.o%s "
c889a16f	272	#define LINK_GCC_C_SEQUENCE_SPEC "%G"
16b61764	273
221cf9ab OH	274	#ifdef IN_LIBGCC2
	275	/* Get the definition for MD_FALLBACK_FRAME_STATE_FOR from a separate
	276	file. This avoids having to recompile the world instead of libgcc only
	277	when changes to this macro are exercised. */
	278
8662eb14	279	#define MD_UNWIND_SUPPORT "config/alpha/vms-unwind.h"
221cf9ab	280	#endif
16b61764	281
5e3fef6c DR	282	#define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
	283	avms_asm_output_external (FILE, DECL, NAME)
	284
	285	typedef struct crtl_name_spec
	286	{
	287	const char *const name;
	288	const char *deccname;
	289	int referenced;
	290	} crtl_name_spec;
	291
	292	#include "config/vms/vms-crtl.h"
	293
	294	/* Alias CRTL names to 32/64bit DECCRTL functions.
	295	Fixme: This should do a binary search. */
	296	#define DO_CRTL_NAMES \
	297	do \
	298	{ \
	299	int i; \
	300	static crtl_name_spec vms_crtl_names[] = CRTL_NAMES; \
	301	static int malloc64_init = 0; \
	302	\
	303	if ((malloc64_init == 0) && TARGET_MALLOC64) \
	304	{ \
	305	for (i=0; vms_crtl_names [i].name; i++) \
	306	{ \
	307	if (strcmp ("calloc", vms_crtl_names [i].name) == 0) \
	308	vms_crtl_names [i].deccname = "decc$_calloc64"; \
	309	else \
	310	if (strcmp ("malloc", vms_crtl_names [i].name) == 0) \
	311	vms_crtl_names [i].deccname = "decc$_malloc64"; \
	312	else \
	313	if (strcmp ("realloc", vms_crtl_names [i].name) == 0) \
	314	vms_crtl_names [i].deccname = "decc$_realloc64"; \
	315	else \
	316	if (strcmp ("strdup", vms_crtl_names [i].name) == 0) \
	317	vms_crtl_names [i].deccname = "decc$_strdup64"; \
	318	} \
	319	malloc64_init = 1; \
	320	} \
	321	for (i=0; vms_crtl_names [i].name; i++) \
	322	if (!vms_crtl_names [i].referenced && \
	323	(strcmp (name, vms_crtl_names [i].name) == 0)) \
	324	{ \
	325	fprintf (file, "\t%s=%s\n", \
	326	name, vms_crtl_names [i].deccname); \
	327	vms_crtl_names [i].referenced = 1; \
	328	} \
	329	} while (0)
	330
e9a25f70 JL	331	/* This is how to output an assembler line
	332	that says to advance the location counter
	333	to a multiple of 2*LOG bytes. /
	334
	335	#undef ASM_OUTPUT_ALIGN
	336	#define ASM_OUTPUT_ALIGN(FILE,LOG) \
	337	fprintf (FILE, "\t.align %d\n", LOG);
	338
7c262518 RH	339	/* Switch into a generic section. */
7c262518 RH	340	#define TARGET_ASM_NAMED_SECTION vms_asm_named_section
e9a25f70 JL	341
e9a25f70 JL	342	#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
d6b5193b RS	343	do { fprintf ((FILE), "\t.literals\n"); \
d6b5193b RS	344	in_section = NULL; \
e9a25f70 JL	345	fprintf ((FILE), "\t"); \
	346	assemble_name (FILE, LABEL1); \
	347	fprintf (FILE, " = "); \
	348	assemble_name (FILE, LABEL2); \
	349	fprintf (FILE, "\n"); \
	350	} while (0)
	351
aacdb8bb	352	#undef PREFERRED_DEBUGGING_TYPE
7a0c8d71	353	#define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
aacdb8bb	354
4977bab6	355	#define ASM_PN_FORMAT "%s___%lu"
aacdb8bb	356
60593797	357	/* ??? VMS uses different linkage. */
eb0424da	358	#undef TARGET_ASM_OUTPUT_MI_THUNK
60593797	359
aacdb8bb	360	#undef ASM_SPEC
aacdb8bb	361	#undef ASM_FINAL_SPEC
7a0c8d71 DR	362
	363	/* The VMS convention is to always provide minimal debug info
	364	for a traceback unless specifically overridden. Defaulting this here
	365	is a kludge. */
	366
	367	#define OPTIMIZATION_OPTIONS(OPTIMIZE, OPTIMIZE_SIZE) \
	368	{ \
	369	write_symbols = VMS_DEBUG; \
	370	debug_info_level = (enum debug_info_level) 1; \
	371	}
	372
	373	/* Override traceback debug info on -g0. */
	374	#undef OVERRIDE_OPTIONS
	375	#define OVERRIDE_OPTIONS \
	376	{ \
	377	if (write_symbols == NO_DEBUG) \
	378	debug_info_level = (enum debug_info_level) 0; \
	379	override_options (); \
	380	}
	381
	382	/* Link with vms-dwarf2.o if -g (except -g0). This causes the
d6b4baa4	383	VMS link to pull all the dwarf2 debug sections together. */
aacdb8bb	384	#undef LINK_SPEC
7a0c8d71 DR	385	#define LINK_SPEC "%{g:-g vms-dwarf2.o%s} %{g0} %{g1:-g1 vms-dwarf2.o%s} \
	386	%{g2:-g2 vms-dwarf2.o%s} %{g3:-g3 vms-dwarf2.o%s} %{shared} %{v} %{map}"
	387
aacdb8bb	388	#undef STARTFILE_SPEC
3bd1b109 DR	389	#define STARTFILE_SPEC \
	390	"%{!shared:%{mvms-return-codes:vcrt0.o%s} %{!mvms-return-codes:pcrt0.o%s} \
	391	crtbegin.o%s} \
	392	%{!static:%{shared:crtbeginS.o%s}}"
	393
	394	#define ENDFILE_SPEC \
	395	"%{!shared:crtend.o%s} %{!static:%{shared:crtendS.o%s}}"
aacdb8bb	396
5a598ccc DR	397	#define NAME__MAIN "__gccmain"
5a598ccc DR	398	#define SYMBOL__MAIN __gccmain
5dd8a9b1	399
3bd1b109 DR	400	#define INIT_SECTION_ASM_OP "\t.section LIB$INITIALIZE,GBL,NOWRT"
3bd1b109 DR	401
41823c5e	402	#define LONGLONG_STANDALONE 1