gcc/config/alpha/unicosmk.h

   1 /* Definitions of target machine for GNU compiler, for DEC Alpha on Cray
   2    T3E running Unicos/Mk.
   3    Copyright (C) 2001
   4    Free Software Foundation, Inc.
   5    Contributed by Roman Lechtchinsky (rl@cs.tu-berlin.de)
   6
   7 This file is part of GNU CC.
   8
   9 GNU CC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 GNU CC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GNU CC; see the file COPYING.  If not, write to
  21 the Free Software Foundation, 59 Temple Place - Suite 330,
  22 Boston, MA 02111-1307, USA.  */
  23
  24 #undef TARGET_ABI_UNICOSMK
  25 #define TARGET_ABI_UNICOSMK 1
  26
  27 /* CAM requires a slash before floating-pointing instruction suffixes.  */
  28
  29 #undef TARGET_AS_SLASH_BEFORE_SUFFIX
  30 #define TARGET_AS_SLASH_BEFORE_SUFFIX 1
  31
  32 /* The following defines are necessary for the standard headers to work
  33    correctly.  */
  34
  35 #define TARGET_OS_CPP_BUILTINS()                                \
  36     do {                                                        \
  37         builtin_define ("__unix");                              \
  38         builtin_define ("_UNICOS=205");                         \
  39         builtin_define ("_CRAY");                               \
  40         builtin_define ("_CRAYT3E");                            \
  41         builtin_define ("_CRAYMPP");                            \
  42         builtin_define ("_CRAYIEEE");                           \
  43         builtin_define ("_ADDR64");                             \
  44         builtin_define ("_LD64");                               \
  45         builtin_define ("__UNICOSMK__");                        \
  46         builtin_define ("__INT_MAX__=9223372036854775807");     \
  47         builtin_define ("__SHRT_MAX__=2147483647");             \
  48     } while (0)
  49
  50 #define SHORT_TYPE_SIZE 32
  51
  52 #undef INT_TYPE_SIZE
  53 #define INT_TYPE_SIZE 64
  54
  55 /* This is consistent with the definition Cray CC uses.  */
  56 #undef WCHAR_TYPE
  57 #define WCHAR_TYPE "int"
  58 #undef WCHAR_TYPE_SIZE
  59 #define WCHAR_TYPE_SIZE 64
  60
  61 /*
  62 #define SIZE_TYPE "unsigned int"
  63 #define PTRDIFF_TYPE "int"
  64 */
  65
  66 /* Alphas are operated in big endian mode on the Cray T3E.  */
  67
  68 #undef BITS_BIG_ENDIAN
  69 #undef BYTES_BIG_ENDIAN
  70 #undef WORDS_BIG_ENDIAN
  71 #define BITS_BIG_ENDIAN 0
  72 #define BYTES_BIG_ENDIAN 1
  73 #define WORDS_BIG_ENDIAN 1
  74
  75
  76 /* Every structure's size must be a multiple of this.  */
  77
  78 #undef STRUCTURE_SIZE_BOUNDARY
  79 #define STRUCTURE_SIZE_BOUNDARY 64
  80
  81 /* No data type wants to be aligned rounder than this.  */
  82
  83 #undef BIGGEST_ALIGNMENT
  84 #define BIGGEST_ALIGNMENT 256
  85
  86 /* Include the frame pointer in fixed_regs and call_used_regs as it can't be
  87    used as a general-purpose register even in frameless functions.
  88    ??? The global_regs hack is needed for now because -O2 sometimes tries to
  89    eliminate $15 increments/decrements in frameless functions.  */
  90
  91 #undef CONDITIONAL_REGISTER_USAGE
  92 #define CONDITIONAL_REGISTER_USAGE      \
  93   do {                                  \
  94     fixed_regs[15] = 1;                 \
  95     call_used_regs[15] = 1;             \
  96     global_regs[15] = 1;                \
  97   } while(0)
  98 \f
  99 /* The stack frame grows downward.  */
 100
 101 #define FRAME_GROWS_DOWNWARD
 102
 103 /* Define the offset between two registers, one to be eliminated, and the
 104    other its replacement, at the start of a routine. This is somewhat
 105    complicated on the T3E which is why we use a function.  */
 106
 107 extern int unicosmk_initial_elimination_offset PARAMS ((int, int));
 108
 109 #undef INITIAL_ELIMINATION_OFFSET
 110 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                    \
 111   do {                                                                  \
 112     (OFFSET) = unicosmk_initial_elimination_offset ((FROM), (TO));      \
 113   } while (0)
 114
 115
 116 /* Define this if stack space is still allocated for a parameter passed
 117    in a register. On the T3E, stack space is preallocated for all outgoing
 118    arguments, including those passed in registers. To avoid problems, we
 119    assume that at least 48 bytes (i.e. enough space for all arguments passed
 120    in registers) are allocated.  */
 121
 122 #define REG_PARM_STACK_SPACE(DECL) 48
 123 #define OUTGOING_REG_PARM_STACK_SPACE
 124
 125 /* If an argument can't be passed in registers even though not all argument
 126    registers have been used yet, it is passed on the stack in the space
 127    preallocated for these registers.  */
 128
 129 #define STACK_PARMS_IN_REG_PARM_AREA
 130
 131 /* This evaluates to nonzero if we do not know how to pass TYPE solely in
 132    registers. This is the case for all arguments that do not fit in two
 133    registers.  */
 134
 135 #define MUST_PASS_IN_STACK(MODE,TYPE)                                   \
 136   ((TYPE) != 0                                                          \
 137    && (TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST                      \
 138        || (TREE_ADDRESSABLE (TYPE) || ALPHA_ARG_SIZE (MODE, TYPE, 0) > 2)))
 139
 140 /* Define a data type for recording info about an argument list
 141    during the scan of that argument list.  This data type should
 142    hold all necessary information about the function itself
 143    and about the args processed so far, enough to enable macros
 144    such as FUNCTION_ARG to determine where the next arg should go.
 145
 146    On Unicos/Mk, this is a structure that contains various information for
 147    the static subroutine information block (SSIB) and the call information
 148    word (CIW).  */
 149
 150 typedef struct {
 151
 152   /* The overall number of arguments.  */
 153   int num_args;
 154
 155   /* The overall size of the arguments in words.  */
 156   int num_arg_words;
 157
 158   /* The number of words passed in registers.  */
 159   int num_reg_words;
 160
 161   /* If an argument must be passed in the stack, all subsequent arguments
 162      must be passed there, too. This flag indicates whether this is the
 163      case.  */
 164   int force_stack;
 165
 166   /* This array indicates whether a word is passed in an integer register or
 167      a floating point one.  */
 168
 169   /* For each of the 6 register arguments, the corresponding flag in this
 170      array indicates whether the argument is passed in an integer or a
 171      floating point register.  */
 172   int reg_args_type[6];
 173
 174 } unicosmk_arg_info;
 175
 176 #undef CUMULATIVE_ARGS
 177 #define CUMULATIVE_ARGS unicosmk_arg_info
 178
 179 /* Initialize a variable CUM of type CUMULATIVE_ARGS for a call to a
 180    function whose data type is FNTYPE.  For a library call, FNTYPE is 0.  */
 181
 182 #undef INIT_CUMULATIVE_ARGS
 183 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT)       \
 184   do { (CUM).num_args = 0;                                      \
 185        (CUM).num_arg_words = 0;                                 \
 186        (CUM).num_reg_words = 0;                                 \
 187        (CUM).force_stack = 0;                                   \
 188   } while(0)
 189
 190 /* Update the data in CUM to advance over an argument of mode MODE and data
 191    type TYPE. (TYPE is null for libcalls where that information may not be
 192    available.)
 193
 194    On Unicos/Mk, at most 6 words can be passed in registers. Structures
 195    which fit in two words are passed in registers, larger structures are
 196    passed on stack.  */
 197
 198 #undef FUNCTION_ARG_ADVANCE
 199 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)            \
 200 do {                                                            \
 201   int size;                                                     \
 202                                                                 \
 203   size = ALPHA_ARG_SIZE (MODE, TYPE, NAMED);                    \
 204                                                                 \
 205   if (size > 2 || MUST_PASS_IN_STACK (MODE, TYPE)               \
 206       || (CUM).num_reg_words + size > 6)                        \
 207     (CUM).force_stack = 1;                                      \
 208                                                                 \
 209   if (! (CUM).force_stack)                                      \
 210     {                                                           \
 211       int i;                                                    \
 212       int isfloat;                                              \
 213       isfloat = (GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT    \
 214               || GET_MODE_CLASS (MODE) == MODE_FLOAT);          \
 215       for (i = 0; i < size; i++)                                \
 216         {                                                       \
 217           (CUM).reg_args_type[(CUM).num_reg_words] = isfloat;   \
 218           ++(CUM).num_reg_words;                                \
 219         }                                                       \
 220     }                                                           \
 221   (CUM).num_arg_words += size;                                  \
 222   ++(CUM).num_args;                                             \
 223 } while(0)
 224
 225 /* We want the default definition for this.
 226    ??? In fact, we should delete the definition from alpha.h as it
 227    corresponds to the default definition for little-endian machines.  */
 228
 229 #undef FUNCTION_ARG_PADDING
 230
 231 /* An argument is passed either entirely in registers or entirely on stack.  */
 232
 233 #undef FUNCTION_ARG_PARTIAL_NREGS
 234 /* #define FUNCTION_ARG_PARTIAL_NREGS(CUM,MODE,TYPE,NAMED) 0 */
 235
 236 /* Perform any needed actions needed for a function that is receiving a
 237    variable number of arguments.
 238
 239    On Unicos/Mk, the standard subroutine __T3E_MISMATCH stores all register
 240    arguments on the stack. Unfortunately, it doesn't always store the first
 241    one (i.e. the one that arrives in $16 or $f16). This is not a problem
 242    with stdargs as we always have at least one named argument there. This is
 243    not always the case when varargs.h is used, however. In such cases, we
 244    have to store the first argument ourselves. We use the information from
 245    the CIW to determine whether the first argument arrives in $16 or $f16.  */
 246
 247 #undef SETUP_INCOMING_VARARGS
 248 #define SETUP_INCOMING_VARARGS(CUM,MODE,TYPE,PRETEND_SIZE,NO_RTL)       \
 249 { if ((CUM).num_reg_words < 6)                                          \
 250     {                                                                   \
 251       if (! (NO_RTL))                                                   \
 252         {                                                               \
 253           int start;                                                    \
 254                                                                         \
 255           start = (CUM).num_reg_words;                                  \
 256           if (!current_function_varargs || start == 0)                  \
 257             ++start;                                                    \
 258                                                                         \
 259           emit_insn (gen_umk_mismatch_args (GEN_INT (start)));          \
 260           if (current_function_varargs && (CUM).num_reg_words == 0)     \
 261             {                                                           \
 262               rtx tmp;                                                  \
 263               rtx int_label, end_label;                                 \
 264                                                                         \
 265               tmp = gen_reg_rtx (DImode);                               \
 266               emit_move_insn (tmp,                                      \
 267                               gen_rtx_ZERO_EXTRACT (DImode,             \
 268                                                     gen_rtx_REG (DImode, 2),\
 269                                                     (GEN_INT (1)),      \
 270                                                     (GEN_INT (7))));    \
 271               int_label = gen_label_rtx ();                             \
 272               end_label = gen_label_rtx ();                             \
 273               emit_insn (gen_cmpdi (tmp, GEN_INT (0)));                 \
 274               emit_jump_insn (gen_beq (int_label));                     \
 275               emit_move_insn (gen_rtx_MEM (DFmode, virtual_incoming_args_rtx),\
 276                               gen_rtx_REG (DFmode, 48));                \
 277               emit_jump (end_label);                                    \
 278               emit_label (int_label);                                   \
 279               emit_move_insn (gen_rtx_MEM (DImode, virtual_incoming_args_rtx),\
 280                               gen_rtx_REG (DImode, 16));                \
 281               emit_label (end_label);                                   \
 282             }                                                           \
 283           emit_insn (gen_arg_home_umk ());                              \
 284         }                                                               \
 285                                                                         \
 286       PRETEND_SIZE = 0;                                                 \
 287     }                                                                   \
 288 }
 289
 290 /* This ensures that $15 increments/decrements in leaf functions won't get
 291    eliminated.  */
 292
 293 #undef EPILOGUE_USES
 294 #define EPILOGUE_USES(REGNO)  ((REGNO) == 26 || (REGNO) == 15)
 295
 296 /* Machine-specific function data.  */
 297
 298 struct machine_function
 299 {
 300   /* List of call information words for calls from this function.  */
 301   struct rtx_def *first_ciw;
 302   struct rtx_def *last_ciw;
 303   int ciw_count;
 304
 305   /* List of deferred case vectors.  */
 306   struct rtx_def *addr_list;
 307 };
 308
 309 /* Would have worked, only the stack doesn't seem to be executable
 310 #undef TRAMPOLINE_TEMPLATE
 311 #define TRAMPOLINE_TEMPLATE(FILE)                       \
 312 do { fprintf (FILE, "\tbr $1,0\n");                     \
 313      fprintf (FILE, "\tldq $0,12($1)\n");               \
 314      fprintf (FILE, "\tldq $1,20($1)\n");               \
 315      fprintf (FILE, "\tjmp $31,(r0)\n");                \
 316      fprintf (FILE, "\tbis $31,$31,$31\n");             \
 317      fprintf (FILE, "\tbis $31,$31,$31\n");             \
 318 } while (0) */
 319
 320 /* We don't support nested functions (yet).  */
 321
 322 #undef TRAMPOLINE_TEMPLATE
 323 #define TRAMPOLINE_TEMPLATE(FILE) abort ()
 324 \f
 325 /* Specify the machine mode that this machine uses for the index in the
 326    tablejump instruction. On Unicos/Mk, we don't support relative case
 327    vectors yet, thus the entries should be absolute addresses.  */
 328
 329 #undef CASE_VECTOR_MODE
 330 #define CASE_VECTOR_MODE DImode
 331
 332 #undef CASE_VECTOR_PC_RELATIVE
 333
 334 /* Define this as 1 if `char' should by default be signed; else as 0.  */
 335 /* #define DEFAULT_SIGNED_CHAR 1 */
 336
 337 /* The Cray assembler is really weird with respect to sections. It has only
 338    named sections and you can't reopen a section once it has been closed.
 339    This means that we have to generate unique names whenever we want to
 340    reenter the text or the data section. The following is a rather bad hack
 341    as TEXT_SECTION_ASM_OP and DATA_SECTION_ASM_OP are supposed to be
 342    constants.  */
 343
 344 #undef TEXT_SECTION_ASM_OP
 345 #define TEXT_SECTION_ASM_OP unicosmk_text_section ()
 346
 347 #undef DATA_SECTION_ASM_OP
 348 #define DATA_SECTION_ASM_OP unicosmk_data_section ()
 349
 350 /* There are ni read-only sections on Unicos/Mk.  */
 351
 352 #undef READONLY_DATA_SECTION
 353 #define READONLY_DATA_SECTION data_section
 354
 355 /* Define extra sections for common data and SSIBs (static subroutine
 356    information blocks). The actual section header is output by the callers
 357    of these functions.  */
 358
 359 #undef EXTRA_SECTIONS
 360 #undef EXTRA_SECTION_FUNCTIONS
 361
 362 #define EXTRA_SECTIONS in_common, in_ssib
 363 #define EXTRA_SECTION_FUNCTIONS \
 364 COMMON_SECTION                  \
 365 SSIB_SECTION
 366
 367 extern void common_section PARAMS ((void));
 368 #define COMMON_SECTION          \
 369 void                            \
 370 common_section ()               \
 371 {                               \
 372   in_section = in_common;       \
 373 }
 374
 375 extern void ssib_section PARAMS ((void));
 376 #define SSIB_SECTION            \
 377 void                            \
 378 ssib_section ()                 \
 379 {                               \
 380   in_section = in_ssib;         \
 381 }
 382
 383 /* A C expression which evaluates to true if declshould be placed into a
 384    unique section for some target-specific reason. On Unicos/Mk, functions
 385    and public variables are always placed in unique sections.  */
 386
 387 /*
 388 #define UNIQUE_SECTION_P(DECL) (TREE_PUBLIC (DECL)              \
 389                                 || TREE_CODE (DECL) == FUNCTION_DECL)
 390 */
 391 #define UNIQUE_SECTION(DECL, RELOC) unicosmk_unique_section (DECL, RELOC)
 392
 393 /* This outputs text to go at the start of an assembler file.  */
 394
 395 #undef ASM_FILE_START
 396 #define ASM_FILE_START(FILE)    unicosmk_asm_file_start (FILE)
 397
 398 /* This outputs text to go at the end of an assembler file.  */
 399
 400 #undef ASM_FILE_END
 401 #define ASM_FILE_END(FILE)      unicosmk_asm_file_end (FILE)
 402
 403 /* We take care of that in ASM_FILE_START.  */
 404
 405 #undef ASM_OUTPUT_SOURCE_FILENAME
 406
 407 /* There is no directive for declaring a label as global. Instead, an
 408    additional colon must be appended when the label is defined.  */
 409
 410 #undef ASM_GLOBALIZE_LABEL
 411 #define ASM_GLOBALIZE_LABEL(FILE,NAME)
 412
 413 /* This is how to output a label for a jump table.  Arguments are the same as
 414    for ASM_OUTPUT_INTERNAL_LABEL, except the insn for the jump table is
 415    passed.  */
 416
 417 #undef ASM_OUTPUT_CASE_LABEL
 418 #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN)        \
 419   ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM)
 420
 421 /* CAM has some restrictions with respect to string literals. It won't
 422    accept lines with more that 256 characters which means that we have
 423    to split long strings. Moreover, it only accepts escape sequences of
 424    the form \nnn in the range 0 to 127. We generate .byte directives for
 425    escapes characters greater than 127. And finally, ` must be escaped.  */
 426
 427 #undef ASM_OUTPUT_ASCII
 428 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
 429   do {                                                                        \
 430     FILE *_hide_asm_out_file = (MYFILE);                                      \
 431     const unsigned char *_hide_p = (const unsigned char *) (MYSTRING);        \
 432     int _hide_thissize = (MYLENGTH);                                          \
 433     int _size_so_far = 0;                                                     \
 434     {                                                                         \
 435       FILE *asm_out_file = _hide_asm_out_file;                                \
 436       const unsigned char *p = _hide_p;                                       \
 437       int thissize = _hide_thissize;                                          \
 438       int in_ascii = 0;                                                       \
 439       int i;                                                                  \
 440                                                                               \
 441       for (i = 0; i < thissize; i++)                                          \
 442         {                                                                     \
 443           register int c = p[i];                                              \
 444                                                                               \
 445           if (c > 127)                                                        \
 446             {                                                                 \
 447               if (in_ascii)                                                   \
 448                 {                                                             \
 449                   fprintf (asm_out_file, "\"\n");                             \
 450                   in_ascii = 0;                                               \
 451                 }                                                             \
 452                                                                               \
 453               fprintf (asm_out_file, "\t.byte\t%d\n", c);                     \
 454             }                                                                 \
 455           else                                                                \
 456             {                                                                 \
 457               if (! in_ascii)                                                 \
 458                 {                                                             \
 459                   fprintf (asm_out_file, "\t.ascii\t\"");                     \
 460                   in_ascii = 1;                                               \
 461                   _size_so_far = 0;                                           \
 462                 }                                                             \
 463               else if (_size_so_far >= 64)                                    \
 464                 {                                                             \
 465                   fprintf (asm_out_file, "\"\n\t.ascii\t\"");                 \
 466                   _size_so_far = 0;                                           \
 467                 }                                                             \
 468                                                                               \
 469               if (c == '\"' || c == '\\' || c == '`')                         \
 470                 putc ('\\', asm_out_file);                                    \
 471               if (c >= ' ')                                                   \
 472                 putc (c, asm_out_file);                                       \
 473               else                                                            \
 474                 fprintf (asm_out_file, "\\%.3o", c);                          \
 475               ++ _size_so_far;                                                \
 476             }                                                                 \
 477         }                                                                     \
 478       if (in_ascii)                                                           \
 479         fprintf (asm_out_file, "\"\n");                                       \
 480     }                                                                         \
 481   } while(0)
 482
 483 /* This is how to output an element of a case-vector that is absolute.  */
 484
 485 #undef ASM_OUTPUT_ADDR_VEC_ELT
 486 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)    \
 487   fprintf (FILE, "\t.quad $L%d\n", (VALUE))
 488
 489 /* This is how to output an element of a case-vector that is relative.
 490    (Unicos/Mk does not use such vectors yet).  */
 491
 492 #undef ASM_OUTPUT_ADDR_DIFF_ELT
 493 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) abort ()
 494
 495 /* We can't output case vectors in the same section as the function code
 496    because CAM doesn't allow data definitions in code sections. Thus, we
 497    simply record the case vectors and put them in a separate section after
 498    the function.  */
 499
 500 #define ASM_OUTPUT_ADDR_VEC(LAB,VEC) \
 501   unicosmk_defer_case_vector ((LAB),(VEC))
 502
 503 #define ASM_OUTPUT_ADDR_DIFF_VEC(LAB,VEC) abort ()
 504
 505 /* This is how to output an assembler line that says to advance the location
 506    counter to a multiple of 2**LOG bytes. Annoyingly, CAM always uses zeroes
 507    to fill the unused space which does not work in code sections. We have to
 508    be careful not to use the .align directive in code sections.  */
 509
 510 #undef ASM_OUTPUT_ALIGN
 511 #define ASM_OUTPUT_ALIGN(STREAM,LOG) unicosmk_output_align (STREAM, LOG)
 512
 513 /* This is how to advance the location counter by SIZE bytes.  */
 514
 515 #undef ASM_OUTPUT_SKIP
 516 #define ASM_OUTPUT_SKIP(STREAM,SIZE)                    \
 517   fprintf ((STREAM), "\t.byte\t0:%d\n", (SIZE));
 518
 519 /* This says how to output an assembler line to define a global common
 520    symbol. We need the alignment information because it has to be supplied
 521    in the section header.  */
 522
 523 #undef ASM_OUTPUT_COMMON
 524 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)      \
 525   unicosmk_output_common ((FILE), (NAME), (SIZE), (ALIGN))
 526
 527 /* This says how to output an assembler line to define a local symbol.  */
 528
 529 #undef ASM_OUTPUT_LOCAL
 530 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
 531   do { data_section ();                                 \
 532        fprintf (FILE, "\t.align\t%d\n", floor_log2 ((ALIGN) / BITS_PER_UNIT));\
 533        ASM_OUTPUT_LABEL ((FILE), (NAME));               \
 534        fprintf (FILE, "\t.byte 0:%d\n", SIZE);          \
 535   } while (0)
 536
 537 /* CAM does not allow us to declare a symbol as external first and then
 538    define it in the same file later. Thus, we keep a list of all external
 539    references, remove all symbols defined locally from it and output it at
 540    the end of the asm file.  */
 541
 542 #define ASM_OUTPUT_EXTERNAL(FILE,DECL,NAME) \
 543   unicosmk_add_extern ((NAME))
 544
 545 #define ASM_OUTPUT_EXTERNAL_LIBCALL(STREAM,SYMREF)      \
 546   unicosmk_add_extern (XSTR ((SYMREF), 0))
 547
 548 /* This is how to declare an object. We don't have to output anything if
 549    it is a global variable because those go into unique `common' sections
 550    and the section name is globally visible. For local variables, we simply
 551    output the label. In any case, we have to record that no extern
 552    declaration should be generated for the symbol.  */
 553
 554 #define ASM_DECLARE_OBJECT_NAME(STREAM,NAME,DECL)       \
 555   do { tree name_tree;                                  \
 556        name_tree = get_identifier ((NAME));             \
 557        TREE_ASM_WRITTEN (name_tree) = 1;                \
 558        if (!TREE_PUBLIC (DECL))                         \
 559          {                                              \
 560            assemble_name (STREAM, NAME);                \
 561            fputs (":\n", STREAM);                       \
 562          }                                              \
 563   } while(0)
 564
 565 /*
 566 #define ASM_OUTPUT_SECTION_NAME(STREAM, DECL, NAME, RELOC)      \
 567   unicosmk_output_section_name ((STREAM), (DECL), (NAME), (RELOC))
 568 */
 569
 570 /* Switch into a generic section.  */
 571 #define TARGET_ASM_NAMED_SECTION unicosmk_asm_named_section
 572
 573 #undef ASM_OUTPUT_MAX_SKIP_ALIGN
 574 #define ASM_OUTPUT_MAX_SKIP_ALIGN(STREAM,POWER,MAXSKIP)
 575 \f
 576 #undef NM_FLAGS
 577
 578 #undef OBJECT_FORMAT_COFF
 579
 580 /* We cannot generate debugging information on Unicos/Mk.  */
 581
 582 #undef SDB_DEBUGGING_INFO
 583 #undef MIPS_DEBUGGING_INFO
 584 #undef DBX_DEBUGGING_INFO
 585 #undef DWARF_DEBUGGING_INFO
 586 #undef DWARF2_DEBUGGING_INFO
 587 #undef DWARF2_UNWIND_INFO
 588 #undef INCOMING_RETURN_ADDR_RTX
 589
 590
 591 /* We use the functions provided by the system library for integer
 592    division.  */
 593
 594 #undef UDIVDI3_LIBCALL
 595 #undef DIVDI3_LIBCALL
 596 #define UDIVDI3_LIBCALL "$uldiv"
 597 #define DIVDI3_LIBCALL "$sldiv"
 598
 599 /* This is necessary to prevent gcc from generating calls to __divsi3.  */
 600
 601 #define INIT_TARGET_OPTABS                                      \
 602   do {                                                          \
 603     sdiv_optab->handlers[(int) SImode].libfunc = NULL_RTX;      \
 604     udiv_optab->handlers[(int) SImode].libfunc = NULL_RTX;      \
 605   } while (0)
 606
 607 #undef ASM_OUTPUT_SOURCE_LINE
 608
 609 /* We don't need a start file.  */
 610
 611 #undef STARTFILE_SPEC
 612 #define STARTFILE_SPEC ""
 613
 614 /* These are the libraries we have to link with.
 615    ??? The Craylibs directory should be autoconfed.  */
 616 #undef LIB_SPEC
 617 #define LIB_SPEC "-L/opt/ctl/craylibs/craylibs -lu -lm -lc -lsma"
 618
 619 #undef BUILD_VA_LIST_TYPE
 620 #undef EXPAND_BUILTIN_VA_START
 621 #undef EXPAND_BUILTIN_VA_ARG
 622
 623 #define EH_FRAME_IN_DATA_SECTION 1