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comparison gcc/config/alpha/vms.h @ 0:a06113de4d67

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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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1 /* Output variables, constants and external declarations, for GNU compiler.
2 Copyright (C) 1996, 1997, 1998, 2000, 2001, 2002, 2004, 2005, 2007, 2008
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
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
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