[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
   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 2, 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 COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

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

/* 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_FP|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);           

/* The structure return address arrives as an "argument" on VMS.  */
#undef STRUCT_VALUE_REGNUM
#define STRUCT_VALUE 0
#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 MAX_OFILE_ALIGNMENT 524288  /* 8 x 2^16 by DEC Ada Test CD40VRA */

#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)  \
((TO) != STACK_POINTER_REGNUM || ! alpha_using_fp ())

#undef INITIAL_ELIMINATION_OFFSET
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)			\
{ if ((FROM) == FRAME_POINTER_REGNUM)					\
    (OFFSET) = alpha_sa_size () + alpha_pv_save_size ();		\
  else if ((FROM) == ARG_POINTER_REGNUM)				\
    (OFFSET) = (ALPHA_ROUND (alpha_sa_size () + alpha_pv_save_size ()	\
			     + get_frame_size ()			\
			     + current_function_pretend_args_size)	\
		- current_function_pretend_args_size);			\
  else									\
    abort();								\
  if ((TO) == STACK_POINTER_REGNUM)					\
    (OFFSET) += ALPHA_ROUND (current_function_outgoing_args_size);	\
}
\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) \
  (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 (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);		\
    }

/* For an arg passed partly in registers and partly in memory,
   this is the number of registers used.
   For args passed entirely in registers or entirely in memory, zero.  */

#undef FUNCTION_ARG_PARTIAL_NREGS
#define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED)		\
((CUM).num_args < 6 && 6 < (CUM).num_args				\
   + ALPHA_ARG_SIZE (MODE, TYPE, NAMED)					\
 ? 6 - (CUM).num_args : 0)

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

#define LINK_SECTION_ASM_OP "\t.link"
#define READONLY_DATA_SECTION_ASM_OP "\t.rdata"
#define LITERALS_SECTION_ASM_OP "\t.literals"
#define CTORS_SECTION_ASM_OP "\t.ctors"
#define DTORS_SECTION_ASM_OP "\t.dtors"

#undef EXTRA_SECTIONS
#define EXTRA_SECTIONS	in_link, in_literals

#undef EXTRA_SECTION_FUNCTIONS
#define EXTRA_SECTION_FUNCTIONS					\
void								\
link_section (void)						\
{								\
  if (in_section != in_link)					\
    {								\
      fprintf (asm_out_file, "%s\n", LINK_SECTION_ASM_OP); 	\
      in_section = in_link;					\
    }								\
}                                                               \
void								\
literals_section (void)						\
{								\
  if (in_section != in_literals)				\
    {								\
      fprintf (asm_out_file, "%s\n", LITERALS_SECTION_ASM_OP); 	\
      in_section = in_literals;					\
    }								\
}

extern void link_section (void);
extern void literals_section (void);

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

#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_COMMON
#define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)		\
do {									\
  fprintf ((FILE), "%s", COMMON_ASM_OP);				\
  assemble_name ((FILE), (NAME));					\
  fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED ",%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT);	\
} while (0)

\f
/* Output assembler code for a block containing the constant parts
   of a trampoline, leaving space for the variable parts.

   The trampoline should set the static chain pointer to value placed
   into the trampoline and should branch to the specified routine.  
   Note that $27 has been set to the address of the trampoline, so we can
   use it for addressability of the two data items.  */

#undef TRAMPOLINE_TEMPLATE
#define TRAMPOLINE_TEMPLATE(FILE)		\
{						\
  fprintf (FILE, "\t.quad 0\n");		\
  fprintf (FILE, "\t.linkage __tramp\n");	\
  fprintf (FILE, "\t.quad 0\n");		\
}

/* 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 "

#ifdef IN_LIBGCC2
#include <pdscdef.h>

#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)		\
 do {									\
  PDSCDEF *pv = *((PDSCDEF **) (CONTEXT)->reg [29]);                    \
									\
  if (pv && ((long) pv & 0x7) == 0) /* low bits 0 means address */      \
    pv = *(PDSCDEF **) pv;                                              \
									\
  if (pv && ((pv->pdsc$w_flags & 0xf) == PDSC$K_KIND_FP_STACK))		\
    {									\
      int i, j;								\
									\
      (FS)->cfa_offset = pv->pdsc$l_size;				\
      (FS)->cfa_reg = pv->pdsc$w_flags & PDSC$M_BASE_REG_IS_FP ? 29 : 30; \
      (FS)->retaddr_column = 26;					\
      (FS)->cfa_how = CFA_REG_OFFSET;					\
      (FS)->regs.reg[27].loc.offset = -pv->pdsc$l_size;			\
      (FS)->regs.reg[27].how = REG_SAVED_OFFSET;			\
      (FS)->regs.reg[26].loc.offset					\
	 = -(pv->pdsc$l_size - pv->pdsc$w_rsa_offset);			\
      (FS)->regs.reg[26].how = REG_SAVED_OFFSET;			\
									\
      for (i = 0, j = 0; i < 32; i++)					\
	if (1<<i & pv->pdsc$l_ireg_mask)				\
	  {								\
	    (FS)->regs.reg[i].loc.offset				\
	      = -(pv->pdsc$l_size - pv->pdsc$w_rsa_offset - 8 * ++j);	\
	    (FS)->regs.reg[i].how = REG_SAVED_OFFSET;			\
	  }								\
									\
      goto SUCCESS;							\
    }									\
  else if (pv && ((pv->pdsc$w_flags & 0xf) == PDSC$K_KIND_FP_REGISTER))	\
    {									\
      (FS)->cfa_offset = pv->pdsc$l_size;				\
      (FS)->cfa_reg = pv->pdsc$w_flags & PDSC$M_BASE_REG_IS_FP ? 29 : 30; \
      (FS)->retaddr_column = 26;					\
      (FS)->cfa_how = CFA_REG_OFFSET;					\
      (FS)->regs.reg[26].loc.reg = pv->pdsc$b_save_ra;			\
      (FS)->regs.reg[26].how = REG_SAVED_REG;			        \
      (FS)->regs.reg[29].loc.reg = pv->pdsc$b_save_fp;			\
      (FS)->regs.reg[29].how = REG_SAVED_REG;			        \
									\
      goto SUCCESS;							\
    }									\
} while (0)
#endif

/* 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 {	literals_section();                                             \
	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}}"

#undef LIB_SPEC
#define LIB_SPEC "-lc"

#define NAME__MAIN "__gccmain"
#define SYMBOL__MAIN __gccmain

#define MD_EXEC_PREFIX "/gnu/lib/gcc-lib/"
#define MD_STARTFILE_PREFIX "/gnu/lib/gcc-lib/"

/* Specify the list of include file directories.  */
#define INCLUDE_DEFAULTS		   \
{					   \
  { "/gnu/lib/gcc-lib/include", 0, 0, 0 }, \
  { "/gnu_gxx_include", 0, 1, 1 },	   \
  { "/gnu_cc_include", 0, 0, 0 },	   \
  { "/gnu/include", 0, 0, 0 },	           \
  { 0, 0, 0, 0 }			   \
}

#define LONGLONG_STANDALONE 1
Commit	Line	Data
16b61764 DR	1	/* Output variables, constants and external declarations, for GNU compiler.
	2	Copyright (C) 1996, 1997, 1998, 2000, 2001, 2002
	3	Free Software Foundation, Inc.
	4
7ec022b2	5	This file is part of GCC.
16b61764	6
7ec022b2	7	GCC is free software; you can redistribute it and/or modify
16b61764 DR	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2, or (at your option)
	10	any later version.
	11
7ec022b2	12	GCC is distributed in the hope that it will be useful,
16b61764 DR	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
7ec022b2	18	along with GCC; see the file COPYING. If not, write to
16b61764 DR	19	the Free Software Foundation, 59 Temple Place - Suite 330,
	20	Boston, MA 02111-1307, USA. */
	21
	22	#define TARGET_OBJECT_SUFFIX ".obj"
	23	#define TARGET_EXECUTABLE_SUFFIX ".exe"
	24
	25	/* This enables certain macros in alpha.h, which will make an indirect
	26	reference to an external symbol an invalid address. This needs to be
	27	defined before we include alpha.h, since it determines which macros
	28	are used for GO_IF_. /
	29
	30	#define NO_EXTERNAL_INDIRECT_ADDRESS
	31
12a41c22 NB	32	#define TARGET_OS_CPP_BUILTINS() \
	33	do { \
	34	builtin_define_std ("vms"); \
	35	builtin_define_std ("VMS"); \
	36	builtin_define ("__ALPHA"); \
	37	builtin_assert ("system=vms"); \
e0322d5c NB	38	if (TARGET_FLOAT_VAX) \
	39	builtin_define ("__G_FLOAT"); \
	40	else \
	41	builtin_define ("__IEEE_FLOAT"); \
12a41c22	42	} while (0)
16b61764	43
16b61764 DR	44	#undef TARGET_DEFAULT
	45	#define TARGET_DEFAULT (MASK_FP\|MASK_FPREGS\|MASK_GAS)
	46	#undef TARGET_ABI_OPEN_VMS
	47	#define TARGET_ABI_OPEN_VMS 1
	48
	49	#undef TARGET_NAME
	50	#define TARGET_NAME "OpenVMS/Alpha"
	51	#undef TARGET_VERSION
	52	#define TARGET_VERSION fprintf (stderr, " (%s)", TARGET_NAME);
	53
	54	/* The structure return address arrives as an "argument" on VMS. */
	55	#undef STRUCT_VALUE_REGNUM
	56	#define STRUCT_VALUE 0
	57	#undef PCC_STATIC_STRUCT_RETURN
	58
	59	/* "long" is 32 bits, but 64 bits for Ada. */
	60	#undef LONG_TYPE_SIZE
	61	#define LONG_TYPE_SIZE 32
	62	#define ADA_LONG_TYPE_SIZE 64
	63
	64	/* Pointer is 32 bits but the hardware has 64-bit addresses, sign extended. */
	65	#undef POINTER_SIZE
	66	#define POINTER_SIZE 32
	67	#define POINTERS_EXTEND_UNSIGNED 0
	68
	69	#define MAX_OFILE_ALIGNMENT 524288 /* 8 x 2^16 by DEC Ada Test CD40VRA */
	70
	71	#undef FIXED_REGISTERS
	72	#define FIXED_REGISTERS \
	73	{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
	74	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
	75	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
	76	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }
	77
	78	#undef CALL_USED_REGISTERS
	79	#define CALL_USED_REGISTERS \
	80	{1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
	81	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
	82	1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
	83	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }
	84
	85	/* List the order in which to allocate registers. Each register must be
	86	listed once, even those in FIXED_REGISTERS.
	87
	88	We allocate in the following order:
	89	$f1 (nonsaved floating-point register)
	90	$f10-$f15 (likewise)
	91	$f22-$f30 (likewise)
	92	$f21-$f16 (likewise, but input args)
	93	$f0 (nonsaved, but return value)
	94	$f2-$f9 (saved floating-point registers)
	95	$1 (nonsaved integer registers)
	96	$22-$25 (likewise)
	97	$28 (likewise)
	98	$0 (likewise, but return value)
	99	$21-$16 (likewise, but input args)
	100	$27 (procedure value in OSF, nonsaved in NT)
	101	$2-$8 (saved integer registers)
	102	$9-$14 (saved integer registers)
	103	$26 (return PC)
	104	$15 (frame pointer)
	105	$29 (global pointer)
	106	$30, $31, $f31 (stack pointer and always zero/ap & fp) */
	107
108	#undef REG_ALLOC_ORDER
109	#define REG_ALLOC_ORDER \
110	{33, \
111	42, 43, 44, 45, 46, 47, \
112	54, 55, 56, 57, 58, 59, 60, 61, 62, \
113	53, 52, 51, 50, 49, 48, \
114	32, \
115	34, 35, 36, 37, 38, 39, 40, 41, \
116	1, \
117	22, 23, 24, 25, \
118	28, \
119	0, \
120	21, 20, 19, 18, 17, 16, \
121	27, \
122	2, 3, 4, 5, 6, 7, 8, \
123	9, 10, 11, 12, 13, 14, \
124	26, \
125	15, \
126	29, \
127	30, 31, 63 }
128
129	#undef HARD_FRAME_POINTER_REGNUM
130	#define HARD_FRAME_POINTER_REGNUM 29
131
132	/* Define registers used by the epilogue and return instruction. */
133	#undef EPILOGUE_USES
134	#define EPILOGUE_USES(REGNO) ((REGNO) == 26 \|\| (REGNO) == 29)
135
136	#undef CAN_ELIMINATE
137	#define CAN_ELIMINATE(FROM, TO) \
138	((TO) != STACK_POINTER_REGNUM \|\| ! alpha_using_fp ())
139
140	#undef INITIAL_ELIMINATION_OFFSET
141	#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
142	{ if ((FROM) == FRAME_POINTER_REGNUM) \
143	(OFFSET) = alpha_sa_size () + alpha_pv_save_size (); \
144	else if ((FROM) == ARG_POINTER_REGNUM) \
145	(OFFSET) = (ALPHA_ROUND (alpha_sa_size () + alpha_pv_save_size () \
146	+ get_frame_size () \
147	+ current_function_pretend_args_size) \
148	- current_function_pretend_args_size); \
149	else \
150	abort(); \
151	if ((TO) == STACK_POINTER_REGNUM) \
152	(OFFSET) += ALPHA_ROUND (current_function_outgoing_args_size); \
153	}
154	\f
155	/* Define a data type for recording info about an argument list
156	during the scan of that argument list. This data type should
157	hold all necessary information about the function itself
158	and about the args processed so far, enough to enable macros
159	such as FUNCTION_ARG to determine where the next arg should go.
160
161	On Alpha/VMS, this is a structure that contains the number of
162	arguments and, for each argument, the datatype of that argument.
163
164	The number of arguments is a number of words of arguments scanned so far.
165	Thus 6 or more means all following args should go on the stack. */
166
167	enum avms_arg_type {I64, FF, FD, FG, FS, FT};
168	typedef struct {int num_args; enum avms_arg_type atypes[6];} avms_arg_info;
169
170	#undef CUMULATIVE_ARGS
171	#define CUMULATIVE_ARGS avms_arg_info
172
173	/* Initialize a variable CUM of type CUMULATIVE_ARGS
174	for a call to a function whose data type is FNTYPE.
175	For a library call, FNTYPE is 0. */
176
177	#undef INIT_CUMULATIVE_ARGS
178	#define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT) \
179	(CUM).num_args = 0; \
180	(CUM).atypes[0] = (CUM).atypes[1] = (CUM).atypes[2] = I64; \
181	(CUM).atypes[3] = (CUM).atypes[4] = (CUM).atypes[5] = I64;
182
183	#undef FUNCTION_ARG_ADVANCE
184	#define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
185	if (MUST_PASS_IN_STACK (MODE, TYPE)) \
186	(CUM).num_args += 6; \
187	else \
188	{ \
189	if ((CUM).num_args < 6) \
190	(CUM).atypes[(CUM).num_args] = alpha_arg_type (MODE); \
191	\
192	(CUM).num_args += ALPHA_ARG_SIZE (MODE, TYPE, NAMED); \
193	}
194
195	/* For an arg passed partly in registers and partly in memory,
196	this is the number of registers used.
197	For args passed entirely in registers or entirely in memory, zero. */
198
199	#undef FUNCTION_ARG_PARTIAL_NREGS
200	#define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
201	((CUM).num_args < 6 && 6 < (CUM).num_args \
202	+ ALPHA_ARG_SIZE (MODE, TYPE, NAMED) \
203	? 6 - (CUM).num_args : 0)
204
16b61764 DR	205	/* ABI has stack checking, but it's broken. */
	206	#undef STACK_CHECK_BUILTIN
	207	#define STACK_CHECK_BUILTIN 0
	208
16b61764	209	#define LINK_SECTION_ASM_OP "\t.link"
d48bc59a	210	#define READONLY_DATA_SECTION_ASM_OP "\t.rdata"
16b61764 DR	211	#define LITERALS_SECTION_ASM_OP "\t.literals"
	212	#define CTORS_SECTION_ASM_OP "\t.ctors"
	213	#define DTORS_SECTION_ASM_OP "\t.dtors"
	214
	215	#undef EXTRA_SECTIONS
d48bc59a	216	#define EXTRA_SECTIONS in_link, in_literals
16b61764 DR	217
	218	#undef EXTRA_SECTION_FUNCTIONS
	219	#define EXTRA_SECTION_FUNCTIONS \
	220	void \
1cd93a2a	221	link_section (void) \
16b61764 DR	222	{ \
	223	if (in_section != in_link) \
	224	{ \
	225	fprintf (asm_out_file, "%s\n", LINK_SECTION_ASM_OP); \
	226	in_section = in_link; \
	227	} \
	228	} \
	229	void \
1cd93a2a	230	literals_section (void) \
16b61764 DR	231	{ \
	232	if (in_section != in_literals) \
	233	{ \
	234	fprintf (asm_out_file, "%s\n", LITERALS_SECTION_ASM_OP); \
	235	in_section = in_literals; \
	236	} \
	237	}
	238
a5c24926 RH	239	extern void link_section (void);
a5c24926 RH	240	extern void literals_section (void);
16b61764 DR	241
	242	#undef ASM_OUTPUT_ADDR_DIFF_ELT
	243	#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) abort ()
	244
	245	#undef ASM_OUTPUT_ADDR_VEC_ELT
	246	#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
	247	fprintf (FILE, "\t.quad $L%d\n", (VALUE))
	248
16b61764 DR	249	#undef CASE_VECTOR_MODE
	250	#define CASE_VECTOR_MODE DImode
	251	#undef CASE_VECTOR_PC_RELATIVE
	252
	253	#undef ASM_OUTPUT_CASE_LABEL
	254	#define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN) \
4977bab6	255	{ ASM_OUTPUT_ALIGN (FILE, 3); (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM); }
16b61764 DR	256
	257	/* This says how to output assembler code to declare an
	258	uninitialized external linkage data object. */
	259
	260	#define COMMON_ASM_OP "\t.comm\t"
	261
	262	#undef ASM_OUTPUT_ALIGNED_COMMON
	263	#define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
	264	do { \
	265	fprintf ((FILE), "%s", COMMON_ASM_OP); \
	266	assemble_name ((FILE), (NAME)); \
74eda121	267	fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED ",%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \
16b61764 DR	268	} while (0)
	269
	270	\f
	271	/* Output assembler code for a block containing the constant parts
	272	of a trampoline, leaving space for the variable parts.
	273
	274	The trampoline should set the static chain pointer to value placed
	275	into the trampoline and should branch to the specified routine.
	276	Note that $27 has been set to the address of the trampoline, so we can
	277	use it for addressability of the two data items. */
	278
	279	#undef TRAMPOLINE_TEMPLATE
	280	#define TRAMPOLINE_TEMPLATE(FILE) \
	281	{ \
	282	fprintf (FILE, "\t.quad 0\n"); \
	283	fprintf (FILE, "\t.linkage __tramp\n"); \
	284	fprintf (FILE, "\t.quad 0\n"); \
	285	}
	286
	287	/* Length in units of the trampoline for entering a nested function. */
	288
	289	#undef TRAMPOLINE_SIZE
	290	#define TRAMPOLINE_SIZE 32
	291
	292	/* The alignment of a trampoline, in bits. */
	293
	294	#undef TRAMPOLINE_ALIGNMENT
	295	#define TRAMPOLINE_ALIGNMENT 64
	296
	297	/* Emit RTL insns to initialize the variable parts of a trampoline.
	298	FNADDR is an RTX for the address of the function's pure code.
	299	CXT is an RTX for the static chain value for the function. */
	300
	301	#undef INITIALIZE_TRAMPOLINE
	302	#define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
	303	alpha_initialize_trampoline (TRAMP, FNADDR, CXT, 16, 24, -1)
	304
	305	/* Control how constructors and destructors are emitted. */
	306	#define TARGET_ASM_CONSTRUCTOR vms_asm_out_constructor
	307	#define TARGET_ASM_DESTRUCTOR vms_asm_out_destructor
	308
	309	#undef SDB_DEBUGGING_INFO
	310	#undef MIPS_DEBUGGING_INFO
	311	#undef DBX_DEBUGGING_INFO
	312
23532de9 JT	313	#define DWARF2_DEBUGGING_INFO 1
23532de9 JT	314	#define VMS_DEBUGGING_INFO 1
16b61764 DR	315
	316	#define DWARF2_UNWIND_INFO 1
	317
	318	#undef EH_RETURN_HANDLER_RTX
	319	#define EH_RETURN_HANDLER_RTX \
	320	gen_rtx_MEM (Pmode, plus_constant (stack_pointer_rtx, 8))
	321
12300dad	322	#define LINK_EH_SPEC "vms-dwarf2eh.o%s "
16b61764 DR	323
16b61764 DR	324	#ifdef IN_LIBGCC2
16b61764	325	#include <pdscdef.h>
16b61764 DR	326
	327	#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \
	328	do { \
3deb00ce	329	PDSCDEF pv = ((PDSCDEF **) (CONTEXT)->reg [29]); \
16b61764	330	\
3deb00ce DR	331	if (pv && ((long) pv & 0x7) == 0) /* low bits 0 means address */ \
3deb00ce DR	332	pv = (PDSCDEF *) pv; \
16b61764 DR	333	\
	334	if (pv && ((pv->pdsc$w_flags & 0xf) == PDSC$K_KIND_FP_STACK)) \
	335	{ \
	336	int i, j; \
	337	\
	338	(FS)->cfa_offset = pv->pdsc$l_size; \
12300dad	339	(FS)->cfa_reg = pv->pdsc$w_flags & PDSC$M_BASE_REG_IS_FP ? 29 : 30; \
16b61764 DR	340	(FS)->retaddr_column = 26; \
	341	(FS)->cfa_how = CFA_REG_OFFSET; \
	342	(FS)->regs.reg[27].loc.offset = -pv->pdsc$l_size; \
	343	(FS)->regs.reg[27].how = REG_SAVED_OFFSET; \
	344	(FS)->regs.reg[26].loc.offset \
4857d29d	345	= -(pv->pdsc$l_size - pv->pdsc$w_rsa_offset); \
16b61764 DR	346	(FS)->regs.reg[26].how = REG_SAVED_OFFSET; \
	347	\
	348	for (i = 0, j = 0; i < 32; i++) \
	349	if (1<<i & pv->pdsc$l_ireg_mask) \
	350	{ \
	351	(FS)->regs.reg[i].loc.offset \
4857d29d	352	= -(pv->pdsc$l_size - pv->pdsc$w_rsa_offset - 8 * ++j); \
16b61764 DR	353	(FS)->regs.reg[i].how = REG_SAVED_OFFSET; \
	354	} \
	355	\
	356	goto SUCCESS; \
	357	} \
3deb00ce DR	358	else if (pv && ((pv->pdsc$w_flags & 0xf) == PDSC$K_KIND_FP_REGISTER)) \
	359	{ \
	360	(FS)->cfa_offset = pv->pdsc$l_size; \
	361	(FS)->cfa_reg = pv->pdsc$w_flags & PDSC$M_BASE_REG_IS_FP ? 29 : 30; \
	362	(FS)->retaddr_column = 26; \
	363	(FS)->cfa_how = CFA_REG_OFFSET; \
	364	(FS)->regs.reg[26].loc.reg = pv->pdsc$b_save_ra; \
	365	(FS)->regs.reg[26].how = REG_SAVED_REG; \
	366	(FS)->regs.reg[29].loc.reg = pv->pdsc$b_save_fp; \
	367	(FS)->regs.reg[29].how = REG_SAVED_REG; \
	368	\
	369	goto SUCCESS; \
	370	} \
16b61764	371	} while (0)
12300dad	372	#endif
16b61764	373
e9a25f70 JL	374	/* This is how to output an assembler line
	375	that says to advance the location counter
	376	to a multiple of 2*LOG bytes. /
	377
	378	#undef ASM_OUTPUT_ALIGN
	379	#define ASM_OUTPUT_ALIGN(FILE,LOG) \
	380	fprintf (FILE, "\t.align %d\n", LOG);
	381
7c262518 RH	382	/* Switch into a generic section. */
7c262518 RH	383	#define TARGET_ASM_NAMED_SECTION vms_asm_named_section
e9a25f70 JL	384
	385	#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
	386	do { literals_section(); \
	387	fprintf ((FILE), "\t"); \
	388	assemble_name (FILE, LABEL1); \
	389	fprintf (FILE, " = "); \
	390	assemble_name (FILE, LABEL2); \
	391	fprintf (FILE, "\n"); \
	392	} while (0)
	393
aacdb8bb	394	#undef PREFERRED_DEBUGGING_TYPE
7a0c8d71	395	#define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
aacdb8bb	396
4977bab6	397	#define ASM_PN_FORMAT "%s___%lu"
aacdb8bb	398
60593797	399	/* ??? VMS uses different linkage. */
eb0424da	400	#undef TARGET_ASM_OUTPUT_MI_THUNK
60593797	401
aacdb8bb	402	#undef ASM_SPEC
aacdb8bb	403	#undef ASM_FINAL_SPEC
7a0c8d71 DR	404
	405	/* The VMS convention is to always provide minimal debug info
	406	for a traceback unless specifically overridden. Defaulting this here
	407	is a kludge. */
	408
	409	#define OPTIMIZATION_OPTIONS(OPTIMIZE, OPTIMIZE_SIZE) \
	410	{ \
	411	write_symbols = VMS_DEBUG; \
	412	debug_info_level = (enum debug_info_level) 1; \
	413	}
	414
	415	/* Override traceback debug info on -g0. */
	416	#undef OVERRIDE_OPTIONS
	417	#define OVERRIDE_OPTIONS \
	418	{ \
	419	if (write_symbols == NO_DEBUG) \
	420	debug_info_level = (enum debug_info_level) 0; \
	421	override_options (); \
	422	}
	423
	424	/* Link with vms-dwarf2.o if -g (except -g0). This causes the
	425	VMS link to pull all the dwarf2 debug sections together. */
aacdb8bb	426	#undef LINK_SPEC
7a0c8d71 DR	427	#define LINK_SPEC "%{g:-g vms-dwarf2.o%s} %{g0} %{g1:-g1 vms-dwarf2.o%s} \
	428	%{g2:-g2 vms-dwarf2.o%s} %{g3:-g3 vms-dwarf2.o%s} %{shared} %{v} %{map}"
	429
aacdb8bb	430	#undef STARTFILE_SPEC
d7c23cdc DR	431	#define STARTFILE_SPEC "%{!shared:%{mvms-return-codes:vcrt0.o%s} \
d7c23cdc DR	432	%{!mvms-return-codes:pcrt0.o%s}}"
aacdb8bb	433
02f7da12 DR	434	#undef LIB_SPEC
	435	#define LIB_SPEC "-lc"
	436
5a598ccc DR	437	#define NAME__MAIN "__gccmain"
5a598ccc DR	438	#define SYMBOL__MAIN __gccmain
5dd8a9b1	439
41823c5e DR	440	#define MD_EXEC_PREFIX "/gnu/lib/gcc-lib/"
	441	#define MD_STARTFILE_PREFIX "/gnu/lib/gcc-lib/"
	442
5dd8a9b1	443	/* Specify the list of include file directories. */
41823c5e DR	444	#define INCLUDE_DEFAULTS \
	445	{ \
	446	{ "/gnu/lib/gcc-lib/include", 0, 0, 0 }, \
	447	{ "/gnu_gxx_include", 0, 1, 1 }, \
	448	{ "/gnu_cc_include", 0, 0, 0 }, \
	449	{ "/gnu/include", 0, 0, 0 }, \
	450	{ 0, 0, 0, 0 } \
5dd8a9b1	451	}
ea5b9a1f	452
41823c5e	453	#define LONGLONG_STANDALONE 1