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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [config/] [lm32/] [lm32.h] - Blame information for rev 801

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1 709 jeremybenn
/* Definitions of target machine for GNU compiler, Lattice Mico32 architecture.
2
   Contributed by Jon Beniston <jon@beniston.com>
3
 
4
   Copyright (C) 2009, 2010, 2011 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 it
9
   under the terms of the GNU General Public License as published
10
   by the Free Software Foundation; either version 3, or (at your
11
   option) any later version.
12
 
13
   GCC is distributed in the hope that it will be useful, but WITHOUT
14
   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15
   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
16
   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
/*-------------------------------*/
23
/* Run-time Target Specification */
24
/*-------------------------------*/
25
 
26
/* Target CPU builtins.  */
27
#define TARGET_CPU_CPP_BUILTINS()                       \
28
  do                                                    \
29
    {                                                   \
30
      builtin_define ("__lm32__");                      \
31
      builtin_assert ("cpu=lm32");                      \
32
      builtin_assert ("machine=lm32");                  \
33
      if (TARGET_MULTIPLY_ENABLED)                      \
34
        builtin_define ("__multiply_enabled__");        \
35
      if (TARGET_DIVIDE_ENABLED)                        \
36
        builtin_define ("__divide_enabled__");          \
37
      if (TARGET_BARREL_SHIFT_ENABLED)                  \
38
        builtin_define ("__barrel_shift_enabled__");    \
39
      if (TARGET_SIGN_EXTEND_ENABLED)                   \
40
        builtin_define ("__sign_extend_enabled__");     \
41
      if (TARGET_USER_ENABLED)                          \
42
        builtin_define ("__user_enabled__");            \
43
    }                                                   \
44
  while (0)
45
 
46
#undef  ASM_SPEC
47
#define ASM_SPEC "\
48
%{mmultiply-enabled} \
49
%{mdivide-enabled} \
50
%{mbarrel-shift-enabled} \
51
%{msign-extend-enabled} \
52
%{muser-enabled} \
53
"
54
 
55
/* Let link script define all link options.
56
   Default to using simulator link script.  */
57
 
58
#undef  STARTFILE_SPEC
59
#define STARTFILE_SPEC ""
60
#undef  ENDFILE_SPEC
61
#define ENDFILE_SPEC ""
62
#undef  LIB_SPEC
63
#define LIB_SPEC "%{!T*:-T sim.ld}"
64
 
65
#undef  CC1_SPEC
66
#define CC1_SPEC "%{G*}"
67
 
68
/*---------------------------------*/
69
/* Target machine storage layout.  */
70
/*---------------------------------*/
71
 
72
#define BITS_BIG_ENDIAN 0
73
#define BYTES_BIG_ENDIAN 1
74
#define WORDS_BIG_ENDIAN 1
75
 
76
#define BITS_PER_UNIT 8
77
#define BITS_PER_WORD 32
78
#define UNITS_PER_WORD 4
79
 
80
#define POINTER_SIZE 32
81
 
82
#define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE)               \
83
do {                                                    \
84
  if (GET_MODE_CLASS (MODE) == MODE_INT                 \
85
      && GET_MODE_SIZE (MODE) < UNITS_PER_WORD)         \
86
    (MODE) = word_mode;                                 \
87
} while (0)
88
 
89
#define PARM_BOUNDARY 32
90
 
91
#define STACK_BOUNDARY 32
92
 
93
#define BIGGEST_ALIGNMENT 64
94
 
95
#define FUNCTION_BOUNDARY  32
96
 
97
#define EMPTY_FIELD_BOUNDARY 32
98
 
99
#define STRICT_ALIGNMENT 1
100
 
101
#define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
102
 
103
/* Make strings word-aligned so strcpy from constants will be faster.  */
104
#define CONSTANT_ALIGNMENT(EXP, ALIGN)  \
105
  (TREE_CODE (EXP) == STRING_CST        \
106
   && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
107
 
108
/* Make arrays and structures word-aligned to allow faster copying etc.  */
109
#define DATA_ALIGNMENT(TYPE, ALIGN)                                     \
110
  ((((ALIGN) < BITS_PER_WORD)                                           \
111
    && (TREE_CODE (TYPE) == ARRAY_TYPE                                  \
112
        || TREE_CODE (TYPE) == UNION_TYPE                               \
113
        || TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN))
114
 
115
/* We need this for the same reason as DATA_ALIGNMENT, namely to cause
116
   character arrays to be word-aligned so that `strcpy' calls that copy
117
   constants to character arrays can be done inline, and 'strcmp' can be
118
   optimised to use word loads.  */
119
#define LOCAL_ALIGNMENT(TYPE, ALIGN) \
120
  DATA_ALIGNMENT (TYPE, ALIGN)
121
 
122
/*----------------------------------------*/
123
/* Layout of source language data types.  */
124
/*----------------------------------------*/
125
 
126
#define INT_TYPE_SIZE               32
127
#define SHORT_TYPE_SIZE             16
128
#define LONG_TYPE_SIZE              32
129
#define LONG_LONG_TYPE_SIZE         64
130
 
131
#define FLOAT_TYPE_SIZE             32
132
#define DOUBLE_TYPE_SIZE            64
133
#define LONG_DOUBLE_TYPE_SIZE       64
134
 
135
#define DEFAULT_SIGNED_CHAR         0
136
 
137
#define SIZE_TYPE "unsigned int"
138
 
139
#define PTRDIFF_TYPE "int"
140
 
141
/*---------------------------*/
142
/* Standard register usage.  */
143
/*---------------------------*/
144
 
145
#define FIRST_PSEUDO_REGISTER  32
146
 
147
#define RV_REGNUM   1
148
#define GP_REGNUM   26
149
#define FP_REGNUM   27
150
#define SP_REGNUM   28
151
#define RA_REGNUM   29
152
 
153
#define G_REG_P(X)      ((X)<32)
154
 
155
#define FIXED_REGISTERS   \
156
{ 1, 0, 0, 0, 0, 0, 0, 0, \
157
  0, 0, 0, 0, 0, 0, 0, 0, \
158
  0, 0, 0, 0, 0, 0, 0, 0, \
159
  0, 0, 1, 0, 1, 0, 1, 1}
160
 
161
#define CALL_USED_REGISTERS \
162
{ 1, 1, 1, 1, 1, 1, 1, 1,   \
163
  1, 1, 1, 0, 0, 0, 0, 0,   \
164
  0, 0, 0, 0, 0, 0, 0, 0,   \
165
  0, 0, 1, 0, 1, 0, 1, 1}
166
 
167
#define HARD_REGNO_NREGS(REGNO, MODE)                                   \
168
    ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
169
 
170
#define HARD_REGNO_MODE_OK(REGNO, MODE) G_REG_P(REGNO)
171
 
172
#define MODES_TIEABLE_P(MODE1, MODE2)           \
173
(      GET_MODE_CLASS (MODE1) == MODE_INT               \
174
    && GET_MODE_CLASS (MODE2) == MODE_INT               \
175
    && GET_MODE_SIZE (MODE1) <= UNITS_PER_WORD  \
176
    && GET_MODE_SIZE (MODE2) <= UNITS_PER_WORD)
177
 
178
#define AVOID_CCMODE_COPIES
179
 
180
/*----------------------------------*/
181
/* Register classes and constants.  */
182
/*----------------------------------*/
183
 
184
enum reg_class
185
{
186
  NO_REGS,
187
  GENERAL_REGS,
188
  ALL_REGS,
189
  LIM_REG_CLASSES
190
};
191
 
192
#define N_REG_CLASSES (int) LIM_REG_CLASSES
193
 
194
#define REG_CLASS_NAMES { "NO_REGS", "GENERAL_REGS", "ALL_REGS" }
195
 
196
#define REG_CLASS_CONTENTS      \
197
{ {0x00000000},                 \
198
  {0xffffffff},                 \
199
  {0xffffffff}                  \
200
}
201
 
202
#define REGNO_REG_CLASS(REGNO) \
203
    (G_REG_P(REGNO) ? GENERAL_REGS : NO_REGS)
204
 
205
#define INDEX_REG_CLASS NO_REGS
206
 
207
#define BASE_REG_CLASS GENERAL_REGS
208
 
209
#define REGNO_OK_FOR_BASE_P(REGNO) \
210
    (G_REG_P (REGNO) || G_REG_P ((unsigned) reg_renumber[REGNO]))
211
 
212
#define REGNO_OK_FOR_INDEX_P(REGNO) 0
213
 
214
/*----------------------------------------*/
215
/* Stack Layout and Calling Conventions.  */
216
/*----------------------------------------*/
217
 
218
#define STACK_GROWS_DOWNWARD 1
219
 
220
#define FRAME_GROWS_DOWNWARD 1
221
 
222
#define STACK_POINTER_OFFSET (UNITS_PER_WORD)
223
 
224
#define STARTING_FRAME_OFFSET (UNITS_PER_WORD)
225
 
226
#define FIRST_PARM_OFFSET(FNDECL) (UNITS_PER_WORD)
227
 
228
#define STACK_POINTER_REGNUM SP_REGNUM
229
 
230
#define FRAME_POINTER_REGNUM FP_REGNUM
231
 
232
#define ARG_POINTER_REGNUM FRAME_POINTER_REGNUM
233
 
234
#define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (SImode, RA_REGNUM)
235
 
236
#define RETURN_ADDR_RTX(count, frame)                                   \
237
  lm32_return_addr_rtx (count, frame)
238
 
239
/* FIXME - This is not yet supported.  */
240
#define STATIC_CHAIN_REGNUM 9
241
 
242
#define ELIMINABLE_REGS \
243
{{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM },                        \
244
 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM },                          \
245
}
246
 
247
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                    \
248
  (OFFSET) = lm32_compute_initial_elimination_offset (FROM, TO)
249
 
250
/*-----------------------------*/
251
/* Function argument passing.  */
252
/*-----------------------------*/
253
 
254
#define ACCUMULATE_OUTGOING_ARGS 1
255
 
256
/*--------------------------------*/
257
/* Passing Arguments in Registers */
258
/*--------------------------------*/
259
 
260
/* The first argument register.  */
261
#define LM32_FIRST_ARG_REG 1
262
 
263
/* The number of (integer) argument register available.  */
264
#define LM32_NUM_ARG_REGS 8
265
 
266
#define CUMULATIVE_ARGS int
267
 
268
#define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT,N_NAMED_ARGS)  \
269
  (CUM) = 0
270
 
271
#define FUNCTION_ARG_REGNO_P(r)                                         \
272
  (((r) >= LM32_FIRST_ARG_REG) && ((r) <= LM32_NUM_ARG_REGS))
273
 
274
/*--------------------*/
275
/* Function results.  */
276
/*--------------------*/
277
 
278
#define FUNCTION_VALUE(VALTYPE, FUNC)                                   \
279
   gen_rtx_REG ((INTEGRAL_TYPE_P (VALTYPE)                              \
280
                 && TYPE_PRECISION (VALTYPE) < BITS_PER_WORD)           \
281
                    ? word_mode                                         \
282
                    : TYPE_MODE (VALTYPE),                              \
283
                    RV_REGNUM)
284
 
285
#define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, RV_REGNUM)
286
 
287
#define FUNCTION_VALUE_REGNO_P(N) ((N) == RV_REGNUM)
288
 
289
#define RETURN_IN_MEMORY(TYPE) lm32_return_in_memory (TYPE)
290
 
291
#define DEFAULT_PCC_STRUCT_RETURN 0
292
 
293
/* Convert from bytes to ints.  */
294
#define LM32_NUM_INTS(X) (((X) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
295
 
296
/* The number of (integer) registers required to hold a quantity of
297
   type MODE.  */
298
#define LM32_NUM_REGS(MODE) LM32_NUM_INTS (GET_MODE_SIZE (MODE))
299
 
300
/* The number of (integer) registers required to hold a quantity of
301
   TYPE MODE.  */
302
#define LM32_NUM_REGS2(MODE, TYPE)                       \
303
  LM32_NUM_INTS ((MODE) == BLKmode ?                     \
304
  int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE))
305
 
306
#define STRUCT_VALUE 0
307
 
308
/*---------------------------*/
309
/* Function entry and exit.  */
310
/*---------------------------*/
311
 
312
/*-------------*/
313
/* Profiling.  */
314
/*-------------*/
315
 
316
#define FUNCTION_PROFILER(FILE, LABELNO)
317
 
318
/*---------------*/
319
/* Trampolines.  */
320
/*---------------*/
321
 
322
#define TRAMPOLINE_SIZE         0
323
 
324
/*---------------------*/
325
/*  Addressing Modes.  */
326
/*---------------------*/
327
 
328
#define CONSTANT_ADDRESS_P(X)                                           \
329
  ((GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF             \
330
    || GET_CODE (X) == CONST_INT || GET_CODE (X) == HIGH                \
331
    || (GET_CODE (X) == CONST)))
332
 
333
#define MAX_REGS_PER_ADDRESS 1
334
 
335
#define STRICT_REG_OK_FOR_BASE_P(X)                                     \
336
  (REGNO_OK_FOR_BASE_P (REGNO (X)))
337
#define NONSTRICT_REG_OK_FOR_BASE_P(X)                                  \
338
  (G_REG_P (REGNO (X)) || !HARD_REGISTER_NUM_P (REGNO (X)))
339
 
340
#ifdef REG_OK_STRICT
341
#define REG_OK_FOR_BASE_P(X) STRICT_REG_OK_FOR_BASE_P(X)
342
#else
343
#define REG_OK_FOR_BASE_P(X) NONSTRICT_REG_OK_FOR_BASE_P(X)
344
#endif
345
 
346
/*-------------------------*/
347
/* Condition Code Status.  */
348
/*-------------------------*/
349
 
350
#define REVERSIBLE_CC_MODE(MODE) 1
351
 
352
/*---------*/
353
/* Costs.  */
354
/*---------*/
355
 
356
#define SLOW_BYTE_ACCESS 1
357
 
358
#define NO_FUNCTION_CSE
359
 
360
#define BRANCH_COST(speed_p, predictable_p) 4
361
 
362
#define MOVE_RATIO(speed) (speed ? 24 : 3)
363
 
364
/*------------*/
365
/* Sections.  */
366
/*------------*/
367
 
368
#define TEXT_SECTION_ASM_OP             "\t.section\t.text"
369
#define DATA_SECTION_ASM_OP             "\t.section\t.data"
370
#define SDATA_SECTION_ASM_OP            "\t.section\t.sdata,\"aw\""
371
#define BSS_SECTION_ASM_OP              "\t.section\t.bss"
372
#define SBSS_SECTION_ASM_OP             "\t.section\t.sbss,\"aw\""
373
 
374
/*-------*/
375
/* PIC.  */
376
/*-------*/
377
 
378
#define PIC_OFFSET_TABLE_REGNUM (flag_pic ? GP_REGNUM : INVALID_REGNUM)
379
 
380
#define JUMP_TABLES_IN_TEXT_SECTION (flag_pic)
381
 
382
#define LEGITIMATE_PIC_OPERAND_P(X)                                    \
383
        (!(nonpic_symbol_mentioned_p (X)))
384
 
385
/*-------------*/
386
/* Assembler.  */
387
/*-------------*/
388
 
389
#define ASM_COMMENT_START "#"
390
 
391
#define ASM_APP_ON "#APP\n"
392
 
393
#define ASM_APP_OFF "#NO_APP\n"
394
 
395
#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
396
 do {                                                                   \
397
        fputc ( '\t', FILE);                                            \
398
        assemble_name (FILE, LABEL1);                                   \
399
        fputs ( " = ", FILE);                                           \
400
        assemble_name (FILE, LABEL2);                                   \
401
        fputc ( '\n', FILE);                                            \
402
 } while (0)
403
 
404
/* Override default implementation in elfos.h to support -G.  */
405
#undef  ASM_OUTPUT_ALIGNED_LOCAL
406
#define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
407
do {                                                                    \
408
  if ((SIZE) <= (unsigned HOST_WIDE_INT) g_switch_value)                \
409
    switch_to_section (sbss_section);                                   \
410
  else                                                                  \
411
    switch_to_section (bss_section);                                    \
412
  ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");                     \
413
  if (!flag_inhibit_size_directive)                                     \
414
    ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE);                       \
415
  ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT));       \
416
  ASM_OUTPUT_LABEL(FILE, NAME);                                         \
417
  ASM_OUTPUT_SKIP((FILE), (SIZE) ? (SIZE) : 1);                         \
418
} while (0)
419
 
420
/* Override default implementation in elfos.h to support -G.  */
421
#undef  ASM_OUTPUT_ALIGNED_COMMON
422
#define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)              \
423
do                                                                      \
424
{                                                                       \
425
  if ((SIZE) <= (unsigned HOST_WIDE_INT) g_switch_value)                \
426
    {                                                                   \
427
      switch_to_section (sbss_section);                                 \
428
      (*targetm.asm_out.globalize_label) (FILE, NAME);                  \
429
      ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");                 \
430
      if (!flag_inhibit_size_directive)                                 \
431
        ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE);                   \
432
      ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT));   \
433
      ASM_OUTPUT_LABEL(FILE, NAME);                                     \
434
      ASM_OUTPUT_SKIP((FILE), (SIZE) ? (SIZE) : 1);                     \
435
    }                                                                   \
436
  else                                                                  \
437
    {                                                                   \
438
      switch_to_section (bss_section);                                  \
439
      fprintf ((FILE), "%s", COMMON_ASM_OP);                            \
440
      assemble_name ((FILE), (NAME));                                   \
441
      fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",          \
442
               (SIZE), (ALIGN) / BITS_PER_UNIT);                        \
443
    }                                                                   \
444
}                                                                       \
445
while (0)
446
 
447
#define ASM_OUTPUT_LABEL(FILE, NAME) \
448
  do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
449
 
450
#define ASM_OUTPUT_LABELREF(FILE,NAME)  \
451
  do {                                  \
452
    const char *xname = (NAME);         \
453
    if (xname[0] == '@')         \
454
      xname += 1;                       \
455
    if (xname[0] == '*')         \
456
      xname += 1;                       \
457
    fputs (xname, FILE);                \
458
  } while (0)
459
 
460
#define ASM_OUTPUT_SYMBOL_REF(STREAM, SYMBOL)                           \
461
  do {                                                                  \
462
    assemble_name (STREAM, XSTR (SYMBOL, 0));                            \
463
  } while (0)
464
 
465
#define GLOBAL_ASM_OP "\t.global\t"
466
 
467
#define REGISTER_NAMES                                          \
468
{                                                               \
469
 "r0",  "r1",  "r2",  "r3",  "r4",  "r5",  "r6",  "r7",         \
470
 "r8",  "r9",  "r10", "r11", "r12", "r13", "r14", "r15",        \
471
 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",        \
472
 "r24", "r25",  "gp",  "fp",  "sp",  "ra",  "ea",  "ba"}
473
 
474
#define PRINT_OPERAND_PUNCT_VALID_P(CHAR) \
475
  (((CHAR) == '&') || ((CHAR) == '@') || ((CHAR) == '*'))
476
 
477
#define PRINT_OPERAND(FILE, X, CODE)                            \
478
  lm32_print_operand (FILE, X, CODE)
479
 
480
#define PRINT_OPERAND_ADDRESS(FILE, ADDR)                       \
481
  lm32_print_operand_address (FILE, ADDR)
482
 
483
#ifndef LOCAL_LABEL_PREFIX
484
#define LOCAL_LABEL_PREFIX      "."
485
#endif
486
 
487
#define ASM_OUTPUT_ALIGN(FILE,LOG)                              \
488
  do { if ((LOG) != 0) fprintf (FILE, "\t.align %d\n", (1 << (LOG))); } while (0)
489
 
490
#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)                    \
491
do {                                                            \
492
  char label[64];                                               \
493
  ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE);              \
494
  fprintf (FILE, "\n\t.word\t");                                \
495
  assemble_name (FILE, label);                                  \
496
  fprintf (FILE, "\n");                                         \
497
} while (0)
498
 
499
#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL)        \
500
do {                                                            \
501
  char label[64];                                               \
502
  fprintf (FILE, "\t.word\t(");                                 \
503
  ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE);              \
504
  assemble_name (FILE, label);                                  \
505
  fprintf (FILE, "-");                                          \
506
  ASM_GENERATE_INTERNAL_LABEL (label, "L", REL);                \
507
  assemble_name (FILE, label);                                  \
508
  fprintf (FILE, ")\n");                                        \
509
} while (0)
510
 
511
/*-------------*/
512
/* Debugging.  */
513
/*-------------*/
514
 
515
#define DBX_REGISTER_NUMBER(REGNO) (REGNO)
516
 
517
#define DEFAULT_GDB_EXTENSIONS 1
518
 
519
/*--------*/
520
/* Misc.  */
521
/*--------*/
522
 
523
#define CASE_VECTOR_MODE Pmode
524
 
525
#define WORD_REGISTER_OPERATIONS
526
 
527
#define LOAD_EXTEND_OP(MODE) ZERO_EXTEND
528
 
529
#define SHORT_IMMEDIATES_SIGN_EXTEND
530
 
531
#define MOVE_MAX        UNITS_PER_WORD
532
#define MAX_MOVE_MAX    4
533
 
534
#define SHIFT_COUNT_TRUNCATED 1
535
 
536
#define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
537
 
538
#define Pmode SImode
539
 
540
#define FUNCTION_MODE SImode
541
 
542
#ifndef NO_IMPLICIT_EXTERN_C
543
#define NO_IMPLICIT_EXTERN_C
544
#endif
545
 
546
#define STORE_FLAG_VALUE 1

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