gcc/config/alpha/vms.h

   1 /* Output variables, constants and external declarations, for GNU compiler.
   2    Copyright (C) 1996, 1997, 1998, 2000, 2001, 2002, 2004, 2005, 2007
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC 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 GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #define TARGET_OBJECT_SUFFIX ".obj"
  22 #define TARGET_EXECUTABLE_SUFFIX ".exe"
  23
  24 /* This enables certain macros in alpha.h, which will make an indirect
  25    reference to an external symbol an invalid address.  This needs to be
  26    defined before we include alpha.h, since it determines which macros
  27    are used for GO_IF_*.  */
  28
  29 #define NO_EXTERNAL_INDIRECT_ADDRESS
  30
  31 #define TARGET_OS_CPP_BUILTINS()                \
  32     do {                                        \
  33         builtin_define_std ("vms");             \
  34         builtin_define_std ("VMS");             \
  35         builtin_define ("__ALPHA");             \
  36         builtin_assert ("system=vms");          \
  37         if (TARGET_FLOAT_VAX)                   \
  38           builtin_define ("__G_FLOAT");         \
  39         else                                    \
  40           builtin_define ("__IEEE_FLOAT");      \
  41     } while (0)
  42
  43 #undef TARGET_DEFAULT
  44 #define TARGET_DEFAULT (MASK_FPREGS|MASK_GAS)
  45 #undef TARGET_ABI_OPEN_VMS
  46 #define TARGET_ABI_OPEN_VMS 1
  47
  48 #undef TARGET_NAME
  49 #define TARGET_NAME "OpenVMS/Alpha"
  50 #undef TARGET_VERSION
  51 #define TARGET_VERSION fprintf (stderr, " (%s)", TARGET_NAME);
  52
  53 #undef PCC_STATIC_STRUCT_RETURN
  54
  55 /* "long" is 32 bits, but 64 bits for Ada.  */
  56 #undef LONG_TYPE_SIZE
  57 #define LONG_TYPE_SIZE 32
  58 #define ADA_LONG_TYPE_SIZE 64
  59
  60 /* Pointer is 32 bits but the hardware has 64-bit addresses, sign extended.  */
  61 #undef POINTER_SIZE
  62 #define POINTER_SIZE 32
  63 #define POINTERS_EXTEND_UNSIGNED 0
  64
  65 #define MAX_OFILE_ALIGNMENT 524288  /* 8 x 2^16 by DEC Ada Test CD40VRA */
  66
  67 #undef FIXED_REGISTERS
  68 #define FIXED_REGISTERS  \
  69  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
  70   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
  71   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
  72   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }
  73
  74 #undef CALL_USED_REGISTERS
  75 #define CALL_USED_REGISTERS  \
  76  {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
  77   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
  78   1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
  79   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }
  80
  81 /* List the order in which to allocate registers.  Each register must be
  82    listed once, even those in FIXED_REGISTERS.
  83
  84    We allocate in the following order:
  85    $f1                  (nonsaved floating-point register)
  86    $f10-$f15            (likewise)
  87    $f22-$f30            (likewise)
  88    $f21-$f16            (likewise, but input args)
  89    $f0                  (nonsaved, but return value)
  90    $f2-$f9              (saved floating-point registers)
  91    $1                   (nonsaved integer registers)
  92    $22-$25              (likewise)
  93    $28                  (likewise)
  94    $0                   (likewise, but return value)
  95    $21-$16              (likewise, but input args)
  96    $27                  (procedure value in OSF, nonsaved in NT)
  97    $2-$8                (saved integer registers)
  98    $9-$14               (saved integer registers)
  99    $26                  (return PC)
 100    $15                  (frame pointer)
 101    $29                  (global pointer)
 102    $30, $31, $f31       (stack pointer and always zero/ap & fp)  */
 103
 104 #undef REG_ALLOC_ORDER
 105 #define REG_ALLOC_ORDER         \
 106   {33,                                  \
 107    42, 43, 44, 45, 46, 47,              \
 108    54, 55, 56, 57, 58, 59, 60, 61, 62,  \
 109    53, 52, 51, 50, 49, 48,              \
 110    32,                                  \
 111    34, 35, 36, 37, 38, 39, 40, 41,      \
 112    1,                                   \
 113    22, 23, 24, 25,                      \
 114    28,                                  \
 115    0,                                   \
 116    21, 20, 19, 18, 17, 16,              \
 117    27,                                  \
 118    2, 3, 4, 5, 6, 7, 8,                 \
 119    9, 10, 11, 12, 13, 14,               \
 120    26,                                  \
 121    15,                                  \
 122    29,                                  \
 123    30, 31, 63 }
 124
 125 #undef HARD_FRAME_POINTER_REGNUM
 126 #define HARD_FRAME_POINTER_REGNUM 29
 127
 128 /* Define registers used by the epilogue and return instruction.  */
 129 #undef EPILOGUE_USES
 130 #define EPILOGUE_USES(REGNO)    ((REGNO) == 26 || (REGNO) == 29)
 131
 132 #undef CAN_ELIMINATE
 133 #define CAN_ELIMINATE(FROM, TO)  \
 134 ((TO) != STACK_POINTER_REGNUM || ! alpha_using_fp ())
 135
 136 #undef INITIAL_ELIMINATION_OFFSET
 137 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                    \
 138 { switch (FROM)                                                         \
 139     {                                                                   \
 140     case FRAME_POINTER_REGNUM:                                          \
 141       (OFFSET) = alpha_sa_size () + alpha_pv_save_size ();              \
 142       break;                                                            \
 143     case ARG_POINTER_REGNUM:                                            \
 144       (OFFSET) = (ALPHA_ROUND (alpha_sa_size () + alpha_pv_save_size () \
 145                                + get_frame_size ()                      \
 146                                + crtl->args.pretend_args_size)  \
 147                   - crtl->args.pretend_args_size);              \
 148       break;                                                            \
 149     default:                                                            \
 150       gcc_unreachable ();                                               \
 151     }                                                                   \
 152   if ((TO) == STACK_POINTER_REGNUM)                                     \
 153     (OFFSET) += ALPHA_ROUND (crtl->outgoing_args_size); \
 154 }
 155 \f
 156 /* Define a data type for recording info about an argument list
 157    during the scan of that argument list.  This data type should
 158    hold all necessary information about the function itself
 159    and about the args processed so far, enough to enable macros
 160    such as FUNCTION_ARG to determine where the next arg should go.
 161
 162    On Alpha/VMS, this is a structure that contains the number of
 163    arguments and, for each argument, the datatype of that argument.
 164
 165    The number of arguments is a number of words of arguments scanned so far.
 166    Thus 6 or more means all following args should go on the stack.  */
 167
 168 enum avms_arg_type {I64, FF, FD, FG, FS, FT};
 169 typedef struct {int num_args; enum avms_arg_type atypes[6];} avms_arg_info;
 170
 171 #undef CUMULATIVE_ARGS
 172 #define CUMULATIVE_ARGS avms_arg_info
 173
 174 /* Initialize a variable CUM of type CUMULATIVE_ARGS
 175    for a call to a function whose data type is FNTYPE.
 176    For a library call, FNTYPE is 0.  */
 177
 178 #undef INIT_CUMULATIVE_ARGS
 179 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
 180   (CUM).num_args = 0;                                           \
 181   (CUM).atypes[0] = (CUM).atypes[1] = (CUM).atypes[2] = I64;    \
 182   (CUM).atypes[3] = (CUM).atypes[4] = (CUM).atypes[5] = I64;
 183
 184 #undef FUNCTION_ARG_ADVANCE
 185 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)                    \
 186   if (targetm.calls.must_pass_in_stack (MODE, TYPE))                    \
 187     (CUM).num_args += 6;                                                \
 188   else                                                                  \
 189     {                                                                   \
 190       if ((CUM).num_args < 6)                                           \
 191         (CUM).atypes[(CUM).num_args] = alpha_arg_type (MODE);           \
 192                                                                         \
 193      (CUM).num_args += ALPHA_ARG_SIZE (MODE, TYPE, NAMED);              \
 194     }
 195
 196 /* ABI has stack checking, but it's broken.  */
 197 #undef STACK_CHECK_BUILTIN
 198 #define STACK_CHECK_BUILTIN 0
 199
 200 #define READONLY_DATA_SECTION_ASM_OP "\t.rdata"
 201 #define CTORS_SECTION_ASM_OP "\t.ctors"
 202 #define DTORS_SECTION_ASM_OP "\t.dtors"
 203
 204 #undef ASM_OUTPUT_ADDR_DIFF_ELT
 205 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) gcc_unreachable ()
 206
 207 #undef ASM_OUTPUT_ADDR_VEC_ELT
 208 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
 209   fprintf (FILE, "\t.quad $L%d\n", (VALUE))
 210
 211 #undef CASE_VECTOR_MODE
 212 #define CASE_VECTOR_MODE DImode
 213 #undef CASE_VECTOR_PC_RELATIVE
 214
 215 #undef ASM_OUTPUT_CASE_LABEL
 216 #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN)        \
 217 { ASM_OUTPUT_ALIGN (FILE, 3); (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM); }
 218
 219 /* This says how to output assembler code to declare an
 220    uninitialized external linkage data object.  */
 221
 222 #define COMMON_ASM_OP "\t.comm\t"
 223
 224 #undef ASM_OUTPUT_ALIGNED_COMMON
 225 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)              \
 226 do {                                                                    \
 227   fprintf ((FILE), "%s", COMMON_ASM_OP);                                \
 228   assemble_name ((FILE), (NAME));                                       \
 229   fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED ",%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT);  \
 230 } while (0)
 231
 232 \f
 233 /* Output assembler code for a block containing the constant parts
 234    of a trampoline, leaving space for the variable parts.
 235
 236    The trampoline should set the static chain pointer to value placed
 237    into the trampoline and should branch to the specified routine.
 238    Note that $27 has been set to the address of the trampoline, so we can
 239    use it for addressability of the two data items.  */
 240
 241 #undef TRAMPOLINE_TEMPLATE
 242 #define TRAMPOLINE_TEMPLATE(FILE)               \
 243 {                                               \
 244   fprintf (FILE, "\t.quad 0\n");                \
 245   fprintf (FILE, "\t.linkage __tramp\n");       \
 246   fprintf (FILE, "\t.quad 0\n");                \
 247 }
 248
 249 /* Length in units of the trampoline for entering a nested function.  */
 250
 251 #undef TRAMPOLINE_SIZE
 252 #define TRAMPOLINE_SIZE    32
 253
 254 /* The alignment of a trampoline, in bits.  */
 255
 256 #undef TRAMPOLINE_ALIGNMENT
 257 #define TRAMPOLINE_ALIGNMENT  64
 258
 259 /* Emit RTL insns to initialize the variable parts of a trampoline.
 260    FNADDR is an RTX for the address of the function's pure code.
 261    CXT is an RTX for the static chain value for the function.  */
 262
 263 #undef INITIALIZE_TRAMPOLINE
 264 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
 265   alpha_initialize_trampoline (TRAMP, FNADDR, CXT, 16, 24, -1)
 266
 267 /* Control how constructors and destructors are emitted.  */
 268 #define TARGET_ASM_CONSTRUCTOR  vms_asm_out_constructor
 269 #define TARGET_ASM_DESTRUCTOR   vms_asm_out_destructor
 270
 271 #undef SDB_DEBUGGING_INFO
 272 #undef MIPS_DEBUGGING_INFO
 273 #undef DBX_DEBUGGING_INFO
 274
 275 #define DWARF2_DEBUGGING_INFO 1
 276 #define VMS_DEBUGGING_INFO 1
 277
 278 #define DWARF2_UNWIND_INFO 1
 279
 280 #undef EH_RETURN_HANDLER_RTX
 281 #define EH_RETURN_HANDLER_RTX \
 282   gen_rtx_MEM (Pmode, plus_constant (stack_pointer_rtx, 8))
 283
 284 #define LINK_EH_SPEC "vms-dwarf2eh.o%s "
 285
 286 #define MD_UNWIND_SUPPORT "config/alpha/vms-unwind.h"
 287
 288 /* This is how to output an assembler line
 289    that says to advance the location counter
 290    to a multiple of 2**LOG bytes.  */
 291
 292 #undef ASM_OUTPUT_ALIGN
 293 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 294     fprintf (FILE, "\t.align %d\n", LOG);
 295
 296 /* Switch into a generic section.  */
 297 #define TARGET_ASM_NAMED_SECTION vms_asm_named_section
 298
 299 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
 300   do {  fprintf ((FILE), "\t.literals\n");                              \
 301         in_section = NULL;                                              \
 302         fprintf ((FILE), "\t");                                         \
 303         assemble_name (FILE, LABEL1);                                   \
 304         fprintf (FILE, " = ");                                          \
 305         assemble_name (FILE, LABEL2);                                   \
 306         fprintf (FILE, "\n");                                           \
 307   } while (0)
 308
 309 #undef PREFERRED_DEBUGGING_TYPE
 310 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 311
 312 #define ASM_PN_FORMAT "%s___%lu"
 313
 314 /* ??? VMS uses different linkage.  */
 315 #undef TARGET_ASM_OUTPUT_MI_THUNK
 316
 317 #undef ASM_SPEC
 318 #undef ASM_FINAL_SPEC
 319
 320 /* The VMS convention is to always provide minimal debug info
 321    for a traceback unless specifically overridden.  Defaulting this here
 322    is a kludge.  */
 323
 324 #define OPTIMIZATION_OPTIONS(OPTIMIZE, OPTIMIZE_SIZE) \
 325 {                                                  \
 326    write_symbols = VMS_DEBUG;                      \
 327    debug_info_level = (enum debug_info_level) 1;   \
 328 }
 329
 330 /* Override traceback debug info on -g0.  */
 331 #undef OVERRIDE_OPTIONS
 332 #define OVERRIDE_OPTIONS                           \
 333 {                                                  \
 334    if (write_symbols == NO_DEBUG)                  \
 335      debug_info_level = (enum debug_info_level) 0; \
 336    override_options ();                            \
 337 }
 338
 339 /* Link with vms-dwarf2.o if -g (except -g0). This causes the
 340    VMS link to pull all the dwarf2 debug sections together.  */
 341 #undef LINK_SPEC
 342 #define LINK_SPEC "%{g:-g vms-dwarf2.o%s} %{g0} %{g1:-g1 vms-dwarf2.o%s} \
 343 %{g2:-g2 vms-dwarf2.o%s} %{g3:-g3 vms-dwarf2.o%s} %{shared} %{v} %{map}"
 344
 345 #undef STARTFILE_SPEC
 346 #define STARTFILE_SPEC "%{!shared:%{mvms-return-codes:vcrt0.o%s} \
 347 %{!mvms-return-codes:pcrt0.o%s}}"
 348
 349 #undef LIB_SPEC
 350 #define LIB_SPEC "-lc"
 351
 352 #define NAME__MAIN "__gccmain"
 353 #define SYMBOL__MAIN __gccmain
 354
 355 #define MD_EXEC_PREFIX "/gnu/lib/gcc-lib/"
 356 #define MD_STARTFILE_PREFIX "/gnu/lib/gcc-lib/"
 357
 358 /* Specify the list of include file directories.  */
 359 #define INCLUDE_DEFAULTS                   \
 360 {                                          \
 361   { "/gnu/lib/gcc-lib/include", 0, 0, 0 }, \
 362   { "/gnu_gxx_include", 0, 1, 1 },         \
 363   { "/gnu_cc_include", 0, 0, 0 },          \
 364   { "/gnu/include", 0, 0, 0 },             \
 365   { 0, 0, 0, 0 }                           \
 366 }
 367
 368 #define LONGLONG_STANDALONE 1