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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [config/] [alpha/] [vms.h] - Blame information for rev 282

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1 282 jeremybenn
/* Output variables, constants and external declarations, for GNU compiler.
2
   Copyright (C) 1996, 1997, 1998, 2000, 2001, 2002, 2004, 2005, 2007, 2008,
3
   2009
4
   Free Software Foundation, Inc.
5
 
6
This file is part of GCC.
7
 
8
GCC is free software; you can redistribute it and/or modify
9
it under the terms of the GNU General Public License as published by
10
the Free Software Foundation; either version 3, or (at your option)
11
any later version.
12
 
13
GCC is distributed in the hope that it will be useful,
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
19
along with GCC; see the file COPYING3.  If not see
20
<http://www.gnu.org/licenses/>.  */
21
 
22
#define TARGET_OBJECT_SUFFIX ".obj"
23
#define TARGET_EXECUTABLE_SUFFIX ".exe"
24
 
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
 
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
 
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");          \
42
        if (TARGET_FLOAT_VAX)                   \
43
          builtin_define ("__G_FLOAT");         \
44
        else                                    \
45
          builtin_define ("__IEEE_FLOAT");      \
46
    } while (0)
47
 
48
#undef TARGET_DEFAULT
49
#define TARGET_DEFAULT (MASK_FPREGS|MASK_GAS)
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
 
58
#define VMS_DEBUG_MAIN_POINTER "TRANSFER$BREAK$GO"
59
 
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
 
72
#define HANDLE_SYSV_PRAGMA 1
73
 
74
#define MAX_OFILE_ALIGNMENT 524288  /* 8 x 2^16 by DEC Ada Test CD40VRA */
75
 
76
/* The maximum alignment 'malloc' honors.  */
77
#undef  MALLOC_ALIGNMENT
78
#define MALLOC_ALIGNMENT ((TARGET_MALLOC64 ? 16 : 8) * BITS_PER_UNIT)
79
 
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 INITIAL_ELIMINATION_OFFSET
146
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                    \
147
  ((OFFSET) = alpha_vms_initial_elimination_offset(FROM, TO))
148
 
149
 
150
/* Define a data type for recording info about an argument list
151
   during the scan of that argument list.  This data type should
152
   hold all necessary information about the function itself
153
   and about the args processed so far, enough to enable macros
154
   such as FUNCTION_ARG to determine where the next arg should go.
155
 
156
   On Alpha/VMS, this is a structure that contains the number of
157
   arguments and, for each argument, the datatype of that argument.
158
 
159
   The number of arguments is a number of words of arguments scanned so far.
160
   Thus 6 or more means all following args should go on the stack.  */
161
 
162
enum avms_arg_type {I64, FF, FD, FG, FS, FT};
163
typedef struct {int num_args; enum avms_arg_type atypes[6];} avms_arg_info;
164
 
165
#undef CUMULATIVE_ARGS
166
#define CUMULATIVE_ARGS avms_arg_info
167
 
168
/* Initialize a variable CUM of type CUMULATIVE_ARGS
169
   for a call to a function whose data type is FNTYPE.
170
   For a library call, FNTYPE is 0.  */
171
 
172
#undef INIT_CUMULATIVE_ARGS
173
#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
174
  (CUM).num_args = 0;                                            \
175
  (CUM).atypes[0] = (CUM).atypes[1] = (CUM).atypes[2] = I64;     \
176
  (CUM).atypes[3] = (CUM).atypes[4] = (CUM).atypes[5] = I64;
177
 
178
#undef FUNCTION_ARG_ADVANCE
179
#define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)                    \
180
  if (targetm.calls.must_pass_in_stack (MODE, TYPE))                    \
181
    (CUM).num_args += 6;                                                \
182
  else                                                                  \
183
    {                                                                   \
184
      if ((CUM).num_args < 6)                                           \
185
        (CUM).atypes[(CUM).num_args] = alpha_arg_type (MODE);           \
186
                                                                        \
187
     (CUM).num_args += ALPHA_ARG_SIZE (MODE, TYPE, NAMED);              \
188
    }
189
 
190
#define DEFAULT_PCC_STRUCT_RETURN 0
191
 
192
#undef  ASM_WEAKEN_LABEL
193
#define ASM_WEAKEN_LABEL(FILE, NAME)                            \
194
   do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME);  \
195
        fputc ('\n', FILE); } while (0)
196
 
197
#define READONLY_DATA_SECTION_ASM_OP "\t.rdata"
198
#define CTORS_SECTION_ASM_OP "\t.ctors"
199
#define DTORS_SECTION_ASM_OP "\t.dtors"
200
#define SDATA_SECTION_ASM_OP "\t.sdata"
201
#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC)              \
202
   asm (SECTION_OP "\n\t.long " #FUNC"\n");
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_DECL_COMMON
225
#define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
226
  vms_output_aligned_decl_common (FILE, DECL, NAME, SIZE, ALIGN)
227
 
228
/* Control how constructors and destructors are emitted.  */
229
#define TARGET_ASM_CONSTRUCTOR  vms_asm_out_constructor
230
#define TARGET_ASM_DESTRUCTOR   vms_asm_out_destructor
231
 
232
#undef SDB_DEBUGGING_INFO
233
#undef MIPS_DEBUGGING_INFO
234
#undef DBX_DEBUGGING_INFO
235
 
236
#define DWARF2_DEBUGGING_INFO 1
237
#define VMS_DEBUGGING_INFO 1
238
 
239
#define DWARF2_UNWIND_INFO 1
240
 
241
#undef EH_RETURN_HANDLER_RTX
242
#define EH_RETURN_HANDLER_RTX \
243
  gen_rtx_MEM (Pmode, plus_constant (stack_pointer_rtx, 8))
244
 
245
#define LINK_EH_SPEC "vms-dwarf2eh.o%s "
246
#define LINK_GCC_C_SEQUENCE_SPEC "%G"
247
 
248
#ifdef IN_LIBGCC2
249
/* Get the definition for MD_FALLBACK_FRAME_STATE_FOR from a separate
250
   file. This avoids having to recompile the world instead of libgcc only
251
   when changes to this macro are exercised.  */
252
 
253
#define MD_UNWIND_SUPPORT "config/alpha/vms-unwind.h"
254
#endif
255
 
256
#define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
257
  avms_asm_output_external (FILE, DECL, NAME)
258
 
259
typedef struct crtl_name_spec
260
{
261
  const char *const name;
262
  const char *deccname;
263
  int referenced;
264
} crtl_name_spec;
265
 
266
#include "config/vms/vms-crtl.h"
267
 
268
/* Alias CRTL names to 32/64bit DECCRTL functions.
269
   Fixme: This should do a binary search.  */
270
#define DO_CRTL_NAMES                                                      \
271
  do                                                                       \
272
    {                                                                      \
273
      int i;                                                               \
274
      static crtl_name_spec vms_crtl_names[] = CRTL_NAMES;                 \
275
      static int malloc64_init = 0;                                        \
276
                                                                           \
277
      if ((malloc64_init == 0) && TARGET_MALLOC64)                          \
278
        {                                                                  \
279
          for (i=0; vms_crtl_names [i].name; i++)                          \
280
            {                                                              \
281
              if (strcmp ("calloc", vms_crtl_names [i].name) == 0)         \
282
                vms_crtl_names [i].deccname = "decc$_calloc64";            \
283
              else                                                         \
284
              if (strcmp ("malloc", vms_crtl_names [i].name) == 0)         \
285
                vms_crtl_names [i].deccname = "decc$_malloc64";            \
286
              else                                                         \
287
              if (strcmp ("realloc", vms_crtl_names [i].name) == 0)        \
288
                vms_crtl_names [i].deccname = "decc$_realloc64";           \
289
              else                                                         \
290
              if (strcmp ("strdup", vms_crtl_names [i].name) == 0)         \
291
                vms_crtl_names [i].deccname = "decc$_strdup64";            \
292
            }                                                              \
293
            malloc64_init = 1;                                             \
294
        }                                                                  \
295
      for (i=0; vms_crtl_names [i].name; i++)                              \
296
        if (!vms_crtl_names [i].referenced &&                              \
297
            (strcmp (name, vms_crtl_names [i].name) == 0))                 \
298
          {                                                                \
299
            fprintf (file, "\t%s=%s\n",                        \
300
                     name, vms_crtl_names [i].deccname);                   \
301
            vms_crtl_names [i].referenced = 1;                             \
302
          }                                                                \
303
    } while (0)
304
 
305
/* This is how to output an assembler line
306
   that says to advance the location counter
307
   to a multiple of 2**LOG bytes.  */
308
 
309
#undef ASM_OUTPUT_ALIGN
310
#define ASM_OUTPUT_ALIGN(FILE,LOG)      \
311
    fprintf (FILE, "\t.align %d\n", LOG);
312
 
313
/* Switch into a generic section.  */
314
#define TARGET_ASM_NAMED_SECTION vms_asm_named_section
315
 
316
#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
317
  do {  fprintf ((FILE), "\t.literals\n");                              \
318
        in_section = NULL;                                              \
319
        fprintf ((FILE), "\t");                                         \
320
        assemble_name (FILE, LABEL1);                                   \
321
        fprintf (FILE, " = ");                                          \
322
        assemble_name (FILE, LABEL2);                                   \
323
        fprintf (FILE, "\n");                                           \
324
  } while (0)
325
 
326
#undef PREFERRED_DEBUGGING_TYPE
327
#define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
328
 
329
#define ASM_PN_FORMAT "%s___%lu"
330
 
331
/* ??? VMS uses different linkage.  */
332
#undef TARGET_ASM_OUTPUT_MI_THUNK
333
 
334
#undef ASM_SPEC
335
#undef ASM_FINAL_SPEC
336
 
337
/* The VMS convention is to always provide minimal debug info
338
   for a traceback unless specifically overridden.  */
339
 
340
#undef OVERRIDE_OPTIONS
341
#define OVERRIDE_OPTIONS                            \
342
{                                                   \
343
  if (write_symbols == NO_DEBUG                     \
344
      && debug_info_level == DINFO_LEVEL_NONE)      \
345
    {                                               \
346
      write_symbols = VMS_DEBUG;                    \
347
      debug_info_level = DINFO_LEVEL_TERSE;         \
348
    }                                               \
349
   override_options ();                             \
350
}
351
 
352
/* Link with vms-dwarf2.o if -g (except -g0). This causes the
353
   VMS link to pull all the dwarf2 debug sections together.  */
354
#undef LINK_SPEC
355
#define LINK_SPEC "%{g:-g vms-dwarf2.o%s} %{g0} %{g1:-g1 vms-dwarf2.o%s} \
356
%{g2:-g2 vms-dwarf2.o%s} %{g3:-g3 vms-dwarf2.o%s} %{shared} %{v} %{map}"
357
 
358
#undef STARTFILE_SPEC
359
#define STARTFILE_SPEC \
360
"%{!shared:%{mvms-return-codes:vcrt0.o%s} %{!mvms-return-codes:pcrt0.o%s} \
361
    crtbegin.o%s} \
362
 %{!static:%{shared:crtbeginS.o%s}}"
363
 
364
#define ENDFILE_SPEC \
365
"%{!shared:crtend.o%s} %{!static:%{shared:crtendS.o%s}}"
366
 
367
#define NAME__MAIN "__gccmain"
368
#define SYMBOL__MAIN __gccmain
369
 
370
#define INIT_SECTION_ASM_OP "\t.section LIB$INITIALIZE,GBL,NOWRT"
371
 
372
#define LONGLONG_STANDALONE 1
373
 
374
#undef TARGET_VALID_POINTER_MODE
375
#define TARGET_VALID_POINTER_MODE vms_valid_pointer_mode

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