libgcc/libgcc2.h

   1 /* Header file for libgcc2.c.  */
   2 /* Copyright (C) 2000-2014 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 Under Section 7 of GPL version 3, you are granted additional
  17 permissions described in the GCC Runtime Library Exception, version
  18 3.1, as published by the Free Software Foundation.
  19
  20 You should have received a copy of the GNU General Public License and
  21 a copy of the GCC Runtime Library Exception along with this program;
  22 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 <http://www.gnu.org/licenses/>.  */
  24
  25 #ifndef GCC_LIBGCC2_H
  26 #define GCC_LIBGCC2_H
  27
  28 #ifndef HIDE_EXPORTS
  29 #pragma GCC visibility push(default)
  30 #endif
  31
  32 extern int __gcc_bcmp (const unsigned char *, const unsigned char *, size_t);
  33 extern void __clear_cache (char *, char *);
  34 extern void __eprintf (const char *, const char *, unsigned int, const char *)
  35   __attribute__ ((__noreturn__));
  36
  37 #ifdef __LIBGCC_HAS_SF_MODE__
  38 #define LIBGCC2_HAS_SF_MODE 1
  39 #else
  40 #define LIBGCC2_HAS_SF_MODE 0
  41 #endif
  42
  43 #ifdef __LIBGCC_HAS_DF_MODE__
  44 #define LIBGCC2_HAS_DF_MODE 1
  45 #else
  46 #define LIBGCC2_HAS_DF_MODE 0
  47 #endif
  48
  49 #ifdef __LIBGCC_HAS_XF_MODE__
  50 #define LIBGCC2_HAS_XF_MODE 1
  51 #else
  52 #define LIBGCC2_HAS_XF_MODE 0
  53 #endif
  54
  55 #ifdef __LIBGCC_HAS_TF_MODE__
  56 #define LIBGCC2_HAS_TF_MODE 1
  57 #else
  58 #define LIBGCC2_HAS_TF_MODE 0
  59 #endif
  60
  61 #ifndef __LIBGCC_SF_MANT_DIG__
  62 #if LIBGCC2_HAS_SF_MODE
  63 #error __LIBGCC_SF_MANT_DIG__ not defined
  64 #else
  65 #define __LIBGCC_SF_MANT_DIG__ 0
  66 #endif
  67 #endif
  68
  69 #ifndef __LIBGCC_DF_MANT_DIG__
  70 #if LIBGCC2_HAS_DF_MODE
  71 #error __LIBGCC_DF_MANT_DIG__ not defined
  72 #else
  73 #define __LIBGCC_DF_MANT_DIG__ 0
  74 #endif
  75 #endif
  76
  77 #ifndef __LIBGCC_XF_MANT_DIG__
  78 #if LIBGCC2_HAS_XF_MODE
  79 #error __LIBGCC_XF_MANT_DIG__ not defined
  80 #else
  81 #define __LIBGCC_XF_MANT_DIG__ 0
  82 #endif
  83 #endif
  84
  85 #ifndef __LIBGCC_TF_MANT_DIG__
  86 #if LIBGCC2_HAS_TF_MODE
  87 #error __LIBGCC_TF_MANT_DIG__ not defined
  88 #else
  89 #define __LIBGCC_TF_MANT_DIG__ 0
  90 #endif
  91 #endif
  92
  93 /* FIXME: This #ifdef probably should be removed, ie. enable the test
  94    for mips too.  */
  95 /* Don't use IBM Extended Double TFmode for TI->SF calculations.
  96    The conversion from long double to float suffers from double
  97    rounding, because we convert via double.  In other cases, going
  98    through the software fp routines is much slower than the fallback.  */
  99 #ifdef __powerpc__
 100 #define AVOID_FP_TYPE_CONVERSION(SIZE) (SIZE == 106)
 101 #elif defined(WIDEST_HARDWARE_FP_SIZE)
 102 #define AVOID_FP_TYPE_CONVERSION(SIZE) (SIZE > WIDEST_HARDWARE_FP_SIZE)
 103 #else
 104 #define AVOID_FP_TYPE_CONVERSION(SIZE) 0
 105 #endif
 106
 107 /* In the first part of this file, we are interfacing to calls generated
 108    by the compiler itself.  These calls pass values into these routines
 109    which have very specific modes (rather than very specific types), and
 110    these compiler-generated calls also expect any return values to have
 111    very specific modes (rather than very specific types).  Thus, we need
 112    to avoid using regular C language type names in this part of the file
 113    because the sizes for those types can be configured to be anything.
 114    Instead we use the following special type names.  */
 115
 116 typedef          int QItype     __attribute__ ((mode (QI)));
 117 typedef unsigned int UQItype    __attribute__ ((mode (QI)));
 118 typedef          int HItype     __attribute__ ((mode (HI)));
 119 typedef unsigned int UHItype    __attribute__ ((mode (HI)));
 120 #if MIN_UNITS_PER_WORD > 1
 121 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1.  */
 122 typedef          int SItype     __attribute__ ((mode (SI)));
 123 typedef unsigned int USItype    __attribute__ ((mode (SI)));
 124 #if __SIZEOF_LONG_LONG__ > 4
 125 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2.  */
 126 typedef          int DItype     __attribute__ ((mode (DI)));
 127 typedef unsigned int UDItype    __attribute__ ((mode (DI)));
 128 #if MIN_UNITS_PER_WORD > 4
 129 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4.  */
 130 typedef          int TItype     __attribute__ ((mode (TI)));
 131 typedef unsigned int UTItype    __attribute__ ((mode (TI)));
 132 #endif
 133 #endif
 134 #endif
 135
 136 #if LIBGCC2_HAS_SF_MODE
 137 typedef         float SFtype    __attribute__ ((mode (SF)));
 138 typedef _Complex float SCtype   __attribute__ ((mode (SC)));
 139 #endif
 140 #if LIBGCC2_HAS_DF_MODE
 141 typedef         float DFtype    __attribute__ ((mode (DF)));
 142 typedef _Complex float DCtype   __attribute__ ((mode (DC)));
 143 #endif
 144 #if LIBGCC2_HAS_XF_MODE
 145 typedef         float XFtype    __attribute__ ((mode (XF)));
 146 typedef _Complex float XCtype   __attribute__ ((mode (XC)));
 147 #endif
 148 #if LIBGCC2_HAS_TF_MODE
 149 typedef         float TFtype    __attribute__ ((mode (TF)));
 150 typedef _Complex float TCtype   __attribute__ ((mode (TC)));
 151 #endif
 152
 153 typedef int cmp_return_type __attribute__((mode (__libgcc_cmp_return__)));
 154 typedef int shift_count_type __attribute__((mode (__libgcc_shift_count__)));
 155
 156 /* Make sure that we don't accidentally use any normal C language built-in
 157    type names in the first part of this file.  Instead we want to use *only*
 158    the type names defined above.  The following macro definitions insure
 159    that if we *do* accidentally use some normal C language built-in type name,
 160    we will get a syntax error.  */
 161
 162 #define char bogus_type
 163 #define short bogus_type
 164 #define int bogus_type
 165 #define long bogus_type
 166 #define unsigned bogus_type
 167 #define float bogus_type
 168 #define double bogus_type
 169
 170 /* Versions prior to 3.4.4 were not taking into account the word size for
 171    the 5 trapping arithmetic functions absv, addv, subv, mulv and negv.  As
 172    a consequence, the si and di variants were always and the only ones emitted.
 173    To maintain backward compatibility, COMPAT_SIMODE_TRAPPING_ARITHMETIC is
 174    defined on platforms where it makes sense to still have the si variants
 175    emitted.  As a bonus, their implementation is now correct.  Note that the
 176    same mechanism should have been implemented for the di variants, but it
 177    turns out that no platform would define COMPAT_DIMODE_TRAPPING_ARITHMETIC
 178    if it existed.  */
 179
 180 #if LIBGCC2_UNITS_PER_WORD == 8
 181 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
 182 #define Wtype   DItype
 183 #define UWtype  UDItype
 184 #define HWtype  DItype
 185 #define UHWtype UDItype
 186 #define DWtype  TItype
 187 #define UDWtype UTItype
 188 #ifdef LIBGCC2_GNU_PREFIX
 189 #define __NW(a,b)       __gnu_ ## a ## di ## b
 190 #define __NDW(a,b)      __gnu_ ## a ## ti ## b
 191 #else
 192 #define __NW(a,b)       __ ## a ## di ## b
 193 #define __NDW(a,b)      __ ## a ## ti ## b
 194 #endif
 195 #define COMPAT_SIMODE_TRAPPING_ARITHMETIC
 196 #elif LIBGCC2_UNITS_PER_WORD == 4
 197 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 198 #define Wtype   SItype
 199 #define UWtype  USItype
 200 #define HWtype  SItype
 201 #define UHWtype USItype
 202 #define DWtype  DItype
 203 #define UDWtype UDItype
 204 #ifdef LIBGCC2_GNU_PREFIX
 205 #define __NW(a,b)       __gnu_ ## a ## si ## b
 206 #define __NDW(a,b)      __gnu_ ## a ## di ## b
 207 #else
 208 #define __NW(a,b)       __ ## a ## si ## b
 209 #define __NDW(a,b)      __ ## a ## di ## b
 210 #endif
 211 #elif LIBGCC2_UNITS_PER_WORD == 2
 212 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 213 #define Wtype   HItype
 214 #define UWtype  UHItype
 215 #define HWtype  HItype
 216 #define UHWtype UHItype
 217 #define DWtype  SItype
 218 #define UDWtype USItype
 219 #ifdef LIBGCC2_GNU_PREFIX
 220 #define __NW(a,b)       __gnu_ ## a ## hi ## b
 221 #define __NDW(a,b)      __gnu_ ## a ## si ## b
 222 #else
 223 #define __NW(a,b)       __ ## a ## hi ## b
 224 #define __NDW(a,b)      __ ## a ## si ## b
 225 #endif
 226 #else
 227 #define W_TYPE_SIZE BITS_PER_UNIT
 228 #define Wtype   QItype
 229 #define UWtype  UQItype
 230 #define HWtype  QItype
 231 #define UHWtype UQItype
 232 #define DWtype  HItype
 233 #define UDWtype UHItype
 234 #ifdef LIBGCC2_GNU_PREFIX
 235 #define __NW(a,b)       __gnu_ ## a ## qi ## b
 236 #define __NDW(a,b)      __gnu_ ## a ## hi ## b
 237 #else
 238 #define __NW(a,b)       __ ## a ## qi ## b
 239 #define __NDW(a,b)      __ ## a ## hi ## b
 240 #endif
 241 #endif
 242
 243 #ifdef LIBGCC2_GNU_PREFIX
 244 #define __N(a)  __gnu_ ## a
 245 #else
 246 #define __N(a)  __ ## a
 247 #endif
 248 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
 249 #define Wtype_MIN (- Wtype_MAX - 1)
 250
 251 #if W_TYPE_SIZE == 8
 252 # define Wtype_MAXp1_F  0x1p8f
 253 #elif W_TYPE_SIZE == 16
 254 # define Wtype_MAXp1_F  0x1p16f
 255 #elif W_TYPE_SIZE == 32
 256 # define Wtype_MAXp1_F  0x1p32f
 257 #elif W_TYPE_SIZE == 64
 258 # define Wtype_MAXp1_F  0x1p64f
 259 #else
 260 # error "expand the table"
 261 #endif
 262
 263 #define __muldi3        __NDW(mul,3)
 264 #define __divdi3        __NDW(div,3)
 265 #define __udivdi3       __NDW(udiv,3)
 266 #define __moddi3        __NDW(mod,3)
 267 #define __umoddi3       __NDW(umod,3)
 268 #define __negdi2        __NDW(neg,2)
 269 #define __lshrdi3       __NDW(lshr,3)
 270 #define __ashldi3       __NDW(ashl,3)
 271 #define __ashrdi3       __NDW(ashr,3)
 272 #define __cmpdi2        __NDW(cmp,2)
 273 #define __ucmpdi2       __NDW(ucmp,2)
 274 #define __udivmoddi4    __NDW(udivmod,4)
 275 #define __fixunstfDI    __NDW(fixunstf,)
 276 #define __fixtfdi       __NDW(fixtf,)
 277 #define __fixunsxfDI    __NDW(fixunsxf,)
 278 #define __fixxfdi       __NDW(fixxf,)
 279 #define __fixunsdfDI    __NDW(fixunsdf,)
 280 #define __fixdfdi       __NDW(fixdf,)
 281 #define __fixunssfDI    __NDW(fixunssf,)
 282 #define __fixsfdi       __NDW(fixsf,)
 283 #define __floatdixf     __NDW(float,xf)
 284 #define __floatditf     __NDW(float,tf)
 285 #define __floatdidf     __NDW(float,df)
 286 #define __floatdisf     __NDW(float,sf)
 287 #define __floatundixf   __NDW(floatun,xf)
 288 #define __floatunditf   __NDW(floatun,tf)
 289 #define __floatundidf   __NDW(floatun,df)
 290 #define __floatundisf   __NDW(floatun,sf)
 291 #define __fixunsxfSI    __NW(fixunsxf,)
 292 #define __fixunstfSI    __NW(fixunstf,)
 293 #define __fixunsdfSI    __NW(fixunsdf,)
 294 #define __fixunssfSI    __NW(fixunssf,)
 295
 296 #define __absvSI2       __NW(absv,2)
 297 #define __addvSI3       __NW(addv,3)
 298 #define __subvSI3       __NW(subv,3)
 299 #define __mulvSI3       __NW(mulv,3)
 300 #define __negvSI2       __NW(negv,2)
 301 #define __absvDI2       __NDW(absv,2)
 302 #define __addvDI3       __NDW(addv,3)
 303 #define __subvDI3       __NDW(subv,3)
 304 #define __mulvDI3       __NDW(mulv,3)
 305 #define __negvDI2       __NDW(negv,2)
 306
 307 #define __ffsSI2        __NW(ffs,2)
 308 #define __clzSI2        __NW(clz,2)
 309 #define __ctzSI2        __NW(ctz,2)
 310 #define __clrsbSI2      __NW(clrsb,2)
 311 #define __popcountSI2   __NW(popcount,2)
 312 #define __paritySI2     __NW(parity,2)
 313 #define __ffsDI2        __NDW(ffs,2)
 314 #define __clzDI2        __NDW(clz,2)
 315 #define __ctzDI2        __NDW(ctz,2)
 316 #define __clrsbDI2      __NDW(clrsb,2)
 317 #define __popcountDI2   __NDW(popcount,2)
 318 #define __parityDI2     __NDW(parity,2)
 319
 320 #define __clz_tab               __N(clz_tab)
 321 #define __bswapsi2              __N(bswapsi2)
 322 #define __bswapdi2              __N(bswapdi2)
 323 #define __udiv_w_sdiv           __N(udiv_w_sdiv)
 324 #define __clear_cache           __N(clear_cache)
 325 #define __enable_execute_stack  __N(enable_execute_stack)
 326
 327 #ifndef __powisf2
 328 #define __powisf2               __N(powisf2)
 329 #endif
 330 #ifndef __powidf2
 331 #define __powidf2               __N(powidf2)
 332 #endif
 333 #ifndef __powitf2
 334 #define __powitf2               __N(powitf2)
 335 #endif
 336 #ifndef __powixf2
 337 #define __powixf2               __N(powixf2)
 338 #endif
 339 #ifndef __mulsc3
 340 #define __mulsc3                __N(mulsc3)
 341 #endif
 342 #ifndef __muldc3
 343 #define __muldc3                __N(muldc3)
 344 #endif
 345 #ifndef __mulxc3
 346 #define __mulxc3                __N(mulxc3)
 347 #endif
 348 #ifndef __multc3
 349 #define __multc3                __N(multc3)
 350 #endif
 351 #ifndef __divsc3
 352 #define __divsc3                __N(divsc3)
 353 #endif
 354 #ifndef __divdc3
 355 #define __divdc3                __N(divdc3)
 356 #endif
 357 #ifndef __divxc3
 358 #define __divxc3                __N(divxc3)
 359 #endif
 360 #ifndef __divtc3
 361 #define __divtc3                __N(divtc3)
 362 #endif
 363
 364 extern DWtype __muldi3 (DWtype, DWtype);
 365 extern DWtype __divdi3 (DWtype, DWtype);
 366 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 367 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 368 extern DWtype __moddi3 (DWtype, DWtype);
 369
 370 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 371 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 372      !defined (L_umoddi3) && !defined (L_moddi3))
 373 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 374 #endif
 375
 376 /* __negdi2 is static inline when building other libgcc2 portions.  */
 377 #if !defined(L_divdi3) && !defined(L_moddi3)
 378 extern DWtype __negdi2 (DWtype);
 379 #endif
 380
 381 extern DWtype __lshrdi3 (DWtype, shift_count_type);
 382 extern DWtype __ashldi3 (DWtype, shift_count_type);
 383 extern DWtype __ashrdi3 (DWtype, shift_count_type);
 384
 385 /* __udiv_w_sdiv is static inline when building other libgcc2 portions.  */
 386 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \
 387      !defined(L_umoddi3) && !defined(L_moddi3))
 388 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 389 #endif
 390
 391 extern cmp_return_type __cmpdi2 (DWtype, DWtype);
 392 extern cmp_return_type __ucmpdi2 (DWtype, DWtype);
 393
 394 #if MIN_UNITS_PER_WORD > 1
 395 extern SItype __bswapsi2 (SItype);
 396 #endif
 397 #if __SIZEOF_LONG_LONG__ > 4
 398 extern DItype __bswapdi2 (DItype);
 399 #endif
 400
 401 extern Wtype __absvSI2 (Wtype);
 402 extern Wtype __addvSI3 (Wtype, Wtype);
 403 extern Wtype __subvSI3 (Wtype, Wtype);
 404 extern Wtype __mulvSI3 (Wtype, Wtype);
 405 extern Wtype __negvSI2 (Wtype);
 406 extern DWtype __absvDI2 (DWtype);
 407 extern DWtype __addvDI3 (DWtype, DWtype);
 408 extern DWtype __subvDI3 (DWtype, DWtype);
 409 extern DWtype __mulvDI3 (DWtype, DWtype);
 410 extern DWtype __negvDI2 (DWtype);
 411
 412 #ifdef COMPAT_SIMODE_TRAPPING_ARITHMETIC
 413 #define __absvsi2       __N(absvsi2)
 414 #define __negvsi2       __N(negvsi2)
 415 #define __addvsi3       __N(addvsi3)
 416 #define __subvsi3       __N(subvsi3)
 417 #define __mulvsi3       __N(mulvsi3)
 418
 419 extern SItype __absvsi2 (SItype);
 420 extern SItype __addvsi3 (SItype, SItype);
 421 extern SItype __subvsi3 (SItype, SItype);
 422 extern SItype __mulvsi3 (SItype, SItype);
 423 extern SItype __negvsi2 (SItype);
 424 #endif /* COMPAT_SIMODE_TRAPPING_ARITHMETIC */
 425
 426 #undef int
 427 #if LIBGCC2_HAS_SF_MODE
 428 extern DWtype __fixsfdi (SFtype);
 429 extern SFtype __floatdisf (DWtype);
 430 extern SFtype __floatundisf (UDWtype);
 431 extern UWtype __fixunssfSI (SFtype);
 432 extern UDWtype __fixunssfDI (SFtype);
 433 extern SFtype __powisf2 (SFtype, int);
 434 extern SCtype __divsc3 (SFtype, SFtype, SFtype, SFtype);
 435 extern SCtype __mulsc3 (SFtype, SFtype, SFtype, SFtype);
 436 #endif
 437 #if LIBGCC2_HAS_DF_MODE
 438 extern DWtype __fixdfdi (DFtype);
 439 extern DFtype __floatdidf (DWtype);
 440 extern DFtype __floatundidf (UDWtype);
 441 extern UWtype __fixunsdfSI (DFtype);
 442 extern UDWtype __fixunsdfDI (DFtype);
 443 extern DFtype __powidf2 (DFtype, int);
 444 extern DCtype __divdc3 (DFtype, DFtype, DFtype, DFtype);
 445 extern DCtype __muldc3 (DFtype, DFtype, DFtype, DFtype);
 446 #endif
 447
 448 #if LIBGCC2_HAS_XF_MODE
 449 extern DWtype __fixxfdi (XFtype);
 450 extern UDWtype __fixunsxfDI (XFtype);
 451 extern XFtype __floatdixf (DWtype);
 452 extern XFtype __floatundixf (UDWtype);
 453 extern UWtype __fixunsxfSI (XFtype);
 454 extern XFtype __powixf2 (XFtype, int);
 455 extern XCtype __divxc3 (XFtype, XFtype, XFtype, XFtype);
 456 extern XCtype __mulxc3 (XFtype, XFtype, XFtype, XFtype);
 457 #endif
 458
 459 #if LIBGCC2_HAS_TF_MODE
 460 extern UDWtype __fixunstfDI (TFtype);
 461 extern DWtype __fixtfdi (TFtype);
 462 extern TFtype __floatditf (DWtype);
 463 extern TFtype __floatunditf (UDWtype);
 464 extern TFtype __powitf2 (TFtype, int);
 465 extern TCtype __divtc3 (TFtype, TFtype, TFtype, TFtype);
 466 extern TCtype __multc3 (TFtype, TFtype, TFtype, TFtype);
 467 #endif
 468 #define int bogus_type
 469
 470 /* DWstructs are pairs of Wtype values in the order determined by
 471    __BYTE_ORDER__.  */
 472
 473 #if __BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__
 474   struct DWstruct {Wtype high, low;};
 475 #else
 476   struct DWstruct {Wtype low, high;};
 477 #endif
 478
 479 /* We need this union to unpack/pack DImode values, since we don't have
 480    any arithmetic yet.  Incoming DImode parameters are stored into the
 481    `ll' field, and the unpacked result is read from the struct `s'.  */
 482
 483 typedef union
 484 {
 485   struct DWstruct s;
 486   DWtype ll;
 487 } DWunion;
 488
 489 /* Defined for L_popcount_tab.  Exported here because some targets may
 490    want to use it for their own versions of the __popcount builtins.  */
 491 extern const UQItype __popcount_tab[256];
 492
 493 /* Defined for L_clz.  Exported here because some targets may want to use
 494    it for their own versions of the __clz builtins.  It contains the bit
 495    position of the first set bit for the numbers 0 - 255.  This avoids the
 496    need for a separate table for the __ctz builtins.  */
 497 extern const UQItype __clz_tab[256];
 498
 499 #include "longlong.h"
 500
 501 #undef int
 502 extern int __clzDI2 (UDWtype);
 503 extern int __clzSI2 (UWtype);
 504 extern int __ctzSI2 (UWtype);
 505 extern int __ctzDI2 (UDWtype);
 506 extern int __clrsbSI2 (Wtype);
 507 extern int __clrsbDI2 (DWtype);
 508 extern int __ffsSI2 (UWtype);
 509 extern int __ffsDI2 (DWtype);
 510 extern int __popcountSI2 (UWtype);
 511 extern int __popcountDI2 (UDWtype);
 512 extern int __paritySI2 (UWtype);
 513 extern int __parityDI2 (UDWtype);
 514 #define int bogus_type
 515
 516 extern void __enable_execute_stack (void *);
 517
 518 #ifndef HIDE_EXPORTS
 519 #pragma GCC visibility pop
 520 #endif
 521
 522 #endif /* ! GCC_LIBGCC2_H */