libgcc/libgcc2.h

   1 /* Header file for libgcc2.c.  */
   2 /* Copyright (C) 2000-2024 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 void __gcc_nested_func_ptr_created (void *, void *, void *);
  33 extern void __gcc_nested_func_ptr_deleted (void);
  34
  35 extern int __gcc_bcmp (const unsigned char *, const unsigned char *, size_t);
  36 extern void __clear_cache (void *, void *);
  37 extern void __eprintf (const char *, const char *, unsigned int, const char *)
  38   __attribute__ ((__noreturn__));
  39
  40 #ifdef __LIBGCC_HAS_HF_MODE__
  41 #define LIBGCC2_HAS_HF_MODE 1
  42 #else
  43 #define LIBGCC2_HAS_HF_MODE 0
  44 #endif
  45
  46 #ifdef __LIBGCC_HAS_SF_MODE__
  47 #define LIBGCC2_HAS_SF_MODE 1
  48 #else
  49 #define LIBGCC2_HAS_SF_MODE 0
  50 #endif
  51
  52 #ifdef __LIBGCC_HAS_DF_MODE__
  53 #define LIBGCC2_HAS_DF_MODE 1
  54 #else
  55 #define LIBGCC2_HAS_DF_MODE 0
  56 #endif
  57
  58 #ifdef __LIBGCC_HAS_XF_MODE__
  59 #define LIBGCC2_HAS_XF_MODE 1
  60 #else
  61 #define LIBGCC2_HAS_XF_MODE 0
  62 #endif
  63
  64 #ifdef __LIBGCC_HAS_TF_MODE__
  65 #define LIBGCC2_HAS_TF_MODE 1
  66 #else
  67 #define LIBGCC2_HAS_TF_MODE 0
  68 #endif
  69
  70 #ifndef __LIBGCC_SF_MANT_DIG__
  71 #if LIBGCC2_HAS_SF_MODE
  72 #error __LIBGCC_SF_MANT_DIG__ not defined
  73 #else
  74 #define __LIBGCC_SF_MANT_DIG__ 0
  75 #endif
  76 #endif
  77
  78 #ifndef __LIBGCC_DF_MANT_DIG__
  79 #if LIBGCC2_HAS_DF_MODE
  80 #error __LIBGCC_DF_MANT_DIG__ not defined
  81 #else
  82 #define __LIBGCC_DF_MANT_DIG__ 0
  83 #endif
  84 #endif
  85
  86 #ifndef __LIBGCC_XF_MANT_DIG__
  87 #if LIBGCC2_HAS_XF_MODE
  88 #error __LIBGCC_XF_MANT_DIG__ not defined
  89 #else
  90 #define __LIBGCC_XF_MANT_DIG__ 0
  91 #endif
  92 #endif
  93
  94 #ifndef __LIBGCC_TF_MANT_DIG__
  95 #if LIBGCC2_HAS_TF_MODE
  96 #error __LIBGCC_TF_MANT_DIG__ not defined
  97 #else
  98 #define __LIBGCC_TF_MANT_DIG__ 0
  99 #endif
 100 #endif
 101
 102 /* FIXME: This #ifdef probably should be removed, ie. enable the test
 103    for mips too.  */
 104 /* Don't use IBM Extended Double TFmode for TI->SF calculations.
 105    The conversion from long double to float suffers from double
 106    rounding, because we convert via double.  In other cases, going
 107    through the software fp routines is much slower than the fallback.  */
 108 #ifdef __powerpc__
 109 #define AVOID_FP_TYPE_CONVERSION(SIZE) (SIZE == 106)
 110 #elif defined(WIDEST_HARDWARE_FP_SIZE)
 111 #define AVOID_FP_TYPE_CONVERSION(SIZE) (SIZE > WIDEST_HARDWARE_FP_SIZE)
 112 #else
 113 #define AVOID_FP_TYPE_CONVERSION(SIZE) 0
 114 #endif
 115
 116 /* In the first part of this file, we are interfacing to calls generated
 117    by the compiler itself.  These calls pass values into these routines
 118    which have very specific modes (rather than very specific types), and
 119    these compiler-generated calls also expect any return values to have
 120    very specific modes (rather than very specific types).  Thus, we need
 121    to avoid using regular C language type names in this part of the file
 122    because the sizes for those types can be configured to be anything.
 123    Instead we use the following special type names.  */
 124
 125 typedef          int QItype     __attribute__ ((mode (QI)));
 126 typedef unsigned int UQItype    __attribute__ ((mode (QI)));
 127 typedef          int HItype     __attribute__ ((mode (HI)));
 128 typedef unsigned int UHItype    __attribute__ ((mode (HI)));
 129 #if MIN_UNITS_PER_WORD > 1
 130 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1.  */
 131 typedef          int SItype     __attribute__ ((mode (SI)));
 132 typedef unsigned int USItype    __attribute__ ((mode (SI)));
 133 #if __SIZEOF_LONG_LONG__ > 4
 134 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2.  */
 135 typedef          int DItype     __attribute__ ((mode (DI)));
 136 typedef unsigned int UDItype    __attribute__ ((mode (DI)));
 137 #if MIN_UNITS_PER_WORD > 4
 138 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4.  */
 139 typedef          int TItype     __attribute__ ((mode (TI)));
 140 typedef unsigned int UTItype    __attribute__ ((mode (TI)));
 141 #endif
 142 #endif
 143 #endif
 144
 145 #if LIBGCC2_HAS_HF_MODE
 146 typedef         float HFtype    __attribute__ ((mode (HF)));
 147 typedef _Complex float HCtype   __attribute__ ((mode (HC)));
 148 #endif
 149 #if LIBGCC2_HAS_SF_MODE
 150 typedef         float SFtype    __attribute__ ((mode (SF)));
 151 typedef _Complex float SCtype   __attribute__ ((mode (SC)));
 152 #endif
 153 #if LIBGCC2_HAS_DF_MODE
 154 typedef         float DFtype    __attribute__ ((mode (DF)));
 155 typedef _Complex float DCtype   __attribute__ ((mode (DC)));
 156 #endif
 157 #if LIBGCC2_HAS_XF_MODE
 158 typedef         float XFtype    __attribute__ ((mode (XF)));
 159 typedef _Complex float XCtype   __attribute__ ((mode (XC)));
 160 #endif
 161 #if LIBGCC2_HAS_TF_MODE
 162 #ifndef TFtype
 163 typedef         float TFtype    __attribute__ ((mode (TF)));
 164 #endif
 165 #ifndef TCtype
 166 typedef _Complex float TCtype   __attribute__ ((mode (TC)));
 167 #endif
 168 #endif
 169
 170 typedef int cmp_return_type __attribute__((mode (__libgcc_cmp_return__)));
 171 typedef int shift_count_type __attribute__((mode (__libgcc_shift_count__)));
 172
 173 /* Make sure that we don't accidentally use any normal C language built-in
 174    type names in the first part of this file.  Instead we want to use *only*
 175    the type names defined above.  The following macro definitions insure
 176    that if we *do* accidentally use some normal C language built-in type name,
 177    we will get a syntax error.  */
 178
 179 #define char bogus_type
 180 #define short bogus_type
 181 #define int bogus_type
 182 #define long bogus_type
 183 #define unsigned bogus_type
 184 #define float bogus_type
 185 #define double bogus_type
 186
 187 #if (defined(__BITINT_MAXWIDTH__) \
 188      && (defined(L_mulbitint3) || defined(L_divmodbitint4)))
 189 #undef LIBGCC2_UNITS_PER_WORD
 190 #define LIBGCC2_UNITS_PER_WORD (__LIBGCC_BITINT_LIMB_WIDTH__ / __CHAR_BIT__)
 191 #endif
 192
 193 /* Versions prior to 3.4.4 were not taking into account the word size for
 194    the 5 trapping arithmetic functions absv, addv, subv, mulv and negv.  As
 195    a consequence, the si and di variants were always and the only ones emitted.
 196    To maintain backward compatibility, COMPAT_SIMODE_TRAPPING_ARITHMETIC is
 197    defined on platforms where it makes sense to still have the si variants
 198    emitted.  As a bonus, their implementation is now correct.  Note that the
 199    same mechanism should have been implemented for the di variants, but it
 200    turns out that no platform would define COMPAT_DIMODE_TRAPPING_ARITHMETIC
 201    if it existed.  */
 202
 203 #if LIBGCC2_UNITS_PER_WORD == 8
 204 #define W_TYPE_SIZE (8 * __CHAR_BIT__)
 205 #define Wtype   DItype
 206 #define UWtype  UDItype
 207 #define HWtype  DItype
 208 #define UHWtype UDItype
 209 #define DWtype  TItype
 210 #define UDWtype UTItype
 211 #ifdef LIBGCC2_GNU_PREFIX
 212 #define __NW(a,b)       __gnu_ ## a ## di ## b
 213 #define __NDW(a,b)      __gnu_ ## a ## ti ## b
 214 #else
 215 #define __NW(a,b)       __ ## a ## di ## b
 216 #define __NDW(a,b)      __ ## a ## ti ## b
 217 #endif
 218 #define COMPAT_SIMODE_TRAPPING_ARITHMETIC
 219 #elif LIBGCC2_UNITS_PER_WORD == 4
 220 #define W_TYPE_SIZE (4 * __CHAR_BIT__)
 221 #define Wtype   SItype
 222 #define UWtype  USItype
 223 #define HWtype  SItype
 224 #define UHWtype USItype
 225 #define DWtype  DItype
 226 #define UDWtype UDItype
 227 #ifdef LIBGCC2_GNU_PREFIX
 228 #define __NW(a,b)       __gnu_ ## a ## si ## b
 229 #define __NDW(a,b)      __gnu_ ## a ## di ## b
 230 #else
 231 #define __NW(a,b)       __ ## a ## si ## b
 232 #define __NDW(a,b)      __ ## a ## di ## b
 233 #endif
 234 #elif LIBGCC2_UNITS_PER_WORD == 2
 235 #define W_TYPE_SIZE (2 * __CHAR_BIT__)
 236 #define Wtype   HItype
 237 #define UWtype  UHItype
 238 #define HWtype  HItype
 239 #define UHWtype UHItype
 240 #define DWtype  SItype
 241 #define UDWtype USItype
 242 #ifdef LIBGCC2_GNU_PREFIX
 243 #define __NW(a,b)       __gnu_ ## a ## hi ## b
 244 #define __NDW(a,b)      __gnu_ ## a ## si ## b
 245 #else
 246 #define __NW(a,b)       __ ## a ## hi ## b
 247 #define __NDW(a,b)      __ ## a ## si ## b
 248 #endif
 249 #else
 250 #define W_TYPE_SIZE __CHAR_BIT__
 251 #define Wtype   QItype
 252 #define UWtype  UQItype
 253 #define HWtype  QItype
 254 #define UHWtype UQItype
 255 #define DWtype  HItype
 256 #define UDWtype UHItype
 257 #ifdef LIBGCC2_GNU_PREFIX
 258 #define __NW(a,b)       __gnu_ ## a ## qi ## b
 259 #define __NDW(a,b)      __gnu_ ## a ## hi ## b
 260 #else
 261 #define __NW(a,b)       __ ## a ## qi ## b
 262 #define __NDW(a,b)      __ ## a ## hi ## b
 263 #endif
 264 #endif
 265
 266 #ifdef LIBGCC2_GNU_PREFIX
 267 #define __N(a)  __gnu_ ## a
 268 #else
 269 #define __N(a)  __ ## a
 270 #endif
 271 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
 272 #define Wtype_MIN (- Wtype_MAX - 1)
 273
 274 #if W_TYPE_SIZE == 8
 275 # define Wtype_MAXp1_F  0x1p8f
 276 #elif W_TYPE_SIZE == 16
 277 # define Wtype_MAXp1_F  0x1p16f
 278 #elif W_TYPE_SIZE == 32
 279 # define Wtype_MAXp1_F  0x1p32f
 280 #elif W_TYPE_SIZE == 64
 281 # define Wtype_MAXp1_F  0x1p64f
 282 #else
 283 # error "expand the table"
 284 #endif
 285
 286 #define __muldi3        __NDW(mul,3)
 287 #define __divdi3        __NDW(div,3)
 288 #define __udivdi3       __NDW(udiv,3)
 289 #define __moddi3        __NDW(mod,3)
 290 #define __umoddi3       __NDW(umod,3)
 291 #define __negdi2        __NDW(neg,2)
 292 #define __lshrdi3       __NDW(lshr,3)
 293 #define __ashldi3       __NDW(ashl,3)
 294 #define __ashrdi3       __NDW(ashr,3)
 295 #define __cmpdi2        __NDW(cmp,2)
 296 #define __ucmpdi2       __NDW(ucmp,2)
 297 #define __divmoddi4     __NDW(divmod,4)
 298 #define __udivmoddi4    __NDW(udivmod,4)
 299 #define __fixunstfDI    __NDW(fixunstf,)
 300 #define __fixtfdi       __NDW(fixtf,)
 301 #define __fixunsxfDI    __NDW(fixunsxf,)
 302 #define __fixxfdi       __NDW(fixxf,)
 303 #define __fixunsdfDI    __NDW(fixunsdf,)
 304 #define __fixdfdi       __NDW(fixdf,)
 305 #define __fixunssfDI    __NDW(fixunssf,)
 306 #define __fixsfdi       __NDW(fixsf,)
 307 #define __floatdixf     __NDW(float,xf)
 308 #define __floatditf     __NDW(float,tf)
 309 #define __floatdidf     __NDW(float,df)
 310 #define __floatdisf     __NDW(float,sf)
 311 #define __floatundixf   __NDW(floatun,xf)
 312 #define __floatunditf   __NDW(floatun,tf)
 313 #define __floatundidf   __NDW(floatun,df)
 314 #define __floatundisf   __NDW(floatun,sf)
 315 #define __fixunsxfSI    __NW(fixunsxf,)
 316 #define __fixunstfSI    __NW(fixunstf,)
 317 #define __fixunsdfSI    __NW(fixunsdf,)
 318 #define __fixunssfSI    __NW(fixunssf,)
 319
 320 #define __absvSI2       __NW(absv,2)
 321 #define __addvSI3       __NW(addv,3)
 322 #define __subvSI3       __NW(subv,3)
 323 #define __mulvSI3       __NW(mulv,3)
 324 #define __negvSI2       __NW(negv,2)
 325 #define __absvDI2       __NDW(absv,2)
 326 #define __addvDI3       __NDW(addv,3)
 327 #define __subvDI3       __NDW(subv,3)
 328 #define __mulvDI3       __NDW(mulv,3)
 329 #define __negvDI2       __NDW(negv,2)
 330
 331 #define __ffsSI2        __NW(ffs,2)
 332 #define __clzSI2        __NW(clz,2)
 333 #define __ctzSI2        __NW(ctz,2)
 334 #define __clrsbSI2      __NW(clrsb,2)
 335 #define __popcountSI2   __NW(popcount,2)
 336 #define __paritySI2     __NW(parity,2)
 337 #define __ffsDI2        __NDW(ffs,2)
 338 #define __clzDI2        __NDW(clz,2)
 339 #define __ctzDI2        __NDW(ctz,2)
 340 #define __clrsbDI2      __NDW(clrsb,2)
 341 #define __popcountDI2   __NDW(popcount,2)
 342 #define __parityDI2     __NDW(parity,2)
 343
 344 #define __clz_tab               __N(clz_tab)
 345 #define __bswapsi2              __N(bswapsi2)
 346 #define __bswapdi2              __N(bswapdi2)
 347 #define __udiv_w_sdiv           __N(udiv_w_sdiv)
 348 #define __clear_cache           __N(clear_cache)
 349 #define __enable_execute_stack  __N(enable_execute_stack)
 350
 351 #ifndef __powisf2
 352 #define __powisf2               __N(powisf2)
 353 #endif
 354 #ifndef __powidf2
 355 #define __powidf2               __N(powidf2)
 356 #endif
 357 #ifndef __powitf2
 358 #define __powitf2               __N(powitf2)
 359 #endif
 360 #ifndef __powixf2
 361 #define __powixf2               __N(powixf2)
 362 #endif
 363 #ifndef __mulsc3
 364 #define __mulsc3                __N(mulsc3)
 365 #endif
 366 #ifndef __muldc3
 367 #define __muldc3                __N(muldc3)
 368 #endif
 369 #ifndef __mulxc3
 370 #define __mulxc3                __N(mulxc3)
 371 #endif
 372 #ifndef __multc3
 373 #define __multc3                __N(multc3)
 374 #endif
 375 #ifndef __divsc3
 376 #define __divsc3                __N(divsc3)
 377 #endif
 378 #ifndef __divdc3
 379 #define __divdc3                __N(divdc3)
 380 #endif
 381 #ifndef __divxc3
 382 #define __divxc3                __N(divxc3)
 383 #endif
 384 #ifndef __divtc3
 385 #define __divtc3                __N(divtc3)
 386 #endif
 387
 388 extern DWtype __muldi3 (DWtype, DWtype);
 389 extern DWtype __divdi3 (DWtype, DWtype);
 390 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 391 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 392 extern DWtype __moddi3 (DWtype, DWtype);
 393 extern DWtype __divmoddi4 (DWtype, DWtype, DWtype *);
 394
 395 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 396 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 397      !defined (L_umoddi3) && !defined (L_moddi3) && \
 398      !defined (L_divmoddi4))
 399 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 400 #endif
 401
 402 #if (defined(__BITINT_MAXWIDTH__) \
 403      && (defined(L_mulbitint3) || defined(L_divmodbitint4)))
 404 /* _BitInt support.  */
 405 typedef UWtype __attribute__((__may_alias__)) UBILtype;
 406 extern void __mulbitint3 (UBILtype *, SItype, const UBILtype *, SItype,
 407                           const UBILtype *, SItype);
 408 extern void __divmodbitint4 (UBILtype *, SItype, UBILtype *, SItype,
 409                              const UBILtype *, SItype, const UBILtype *,
 410                              SItype);
 411 #endif
 412
 413 /* __negdi2 is static inline when building other libgcc2 portions.  */
 414 #if !defined(L_divdi3) && !defined(L_moddi3)
 415 extern DWtype __negdi2 (DWtype);
 416 #endif
 417
 418 extern DWtype __lshrdi3 (DWtype, shift_count_type);
 419 extern DWtype __ashldi3 (DWtype, shift_count_type);
 420 extern DWtype __ashrdi3 (DWtype, shift_count_type);
 421
 422 /* __udiv_w_sdiv is static inline when building other libgcc2 portions.  */
 423 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \
 424      !defined(L_umoddi3) && !defined(L_moddi3))
 425 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 426 #endif
 427
 428 extern cmp_return_type __cmpdi2 (DWtype, DWtype);
 429 extern cmp_return_type __ucmpdi2 (UDWtype, UDWtype);
 430
 431 #if MIN_UNITS_PER_WORD > 1
 432 extern SItype __bswapsi2 (SItype);
 433 #endif
 434 #if __SIZEOF_LONG_LONG__ > 4
 435 extern DItype __bswapdi2 (DItype);
 436 #endif
 437
 438 extern Wtype __absvSI2 (Wtype);
 439 extern Wtype __addvSI3 (Wtype, Wtype);
 440 extern Wtype __subvSI3 (Wtype, Wtype);
 441 extern Wtype __mulvSI3 (Wtype, Wtype);
 442 extern Wtype __negvSI2 (Wtype);
 443 extern DWtype __absvDI2 (DWtype);
 444 extern DWtype __addvDI3 (DWtype, DWtype);
 445 extern DWtype __subvDI3 (DWtype, DWtype);
 446 extern DWtype __mulvDI3 (DWtype, DWtype);
 447 extern DWtype __negvDI2 (DWtype);
 448
 449 #ifdef COMPAT_SIMODE_TRAPPING_ARITHMETIC
 450 #define __absvsi2       __N(absvsi2)
 451 #define __negvsi2       __N(negvsi2)
 452 #define __addvsi3       __N(addvsi3)
 453 #define __subvsi3       __N(subvsi3)
 454 #define __mulvsi3       __N(mulvsi3)
 455
 456 extern SItype __absvsi2 (SItype);
 457 extern SItype __addvsi3 (SItype, SItype);
 458 extern SItype __subvsi3 (SItype, SItype);
 459 extern SItype __mulvsi3 (SItype, SItype);
 460 extern SItype __negvsi2 (SItype);
 461 #endif /* COMPAT_SIMODE_TRAPPING_ARITHMETIC */
 462
 463 #undef int
 464 #if LIBGCC2_HAS_HF_MODE
 465 extern HCtype __divhc3 (HFtype, HFtype, HFtype, HFtype);
 466 extern HCtype __mulhc3 (HFtype, HFtype, HFtype, HFtype);
 467 #endif
 468 #if LIBGCC2_HAS_SF_MODE
 469 extern DWtype __fixsfdi (SFtype);
 470 extern SFtype __floatdisf (DWtype);
 471 extern SFtype __floatundisf (UDWtype);
 472 extern UWtype __fixunssfSI (SFtype);
 473 extern UDWtype __fixunssfDI (SFtype);
 474 extern SFtype __powisf2 (SFtype, int);
 475 extern SCtype __divsc3 (SFtype, SFtype, SFtype, SFtype);
 476 extern SCtype __mulsc3 (SFtype, SFtype, SFtype, SFtype);
 477 #endif
 478 #if LIBGCC2_HAS_DF_MODE
 479 extern DWtype __fixdfdi (DFtype);
 480 extern DFtype __floatdidf (DWtype);
 481 extern DFtype __floatundidf (UDWtype);
 482 extern UWtype __fixunsdfSI (DFtype);
 483 extern UDWtype __fixunsdfDI (DFtype);
 484 extern DFtype __powidf2 (DFtype, int);
 485 extern DCtype __divdc3 (DFtype, DFtype, DFtype, DFtype);
 486 extern DCtype __muldc3 (DFtype, DFtype, DFtype, DFtype);
 487 #endif
 488
 489 #if LIBGCC2_HAS_XF_MODE
 490 extern DWtype __fixxfdi (XFtype);
 491 extern UDWtype __fixunsxfDI (XFtype);
 492 extern XFtype __floatdixf (DWtype);
 493 extern XFtype __floatundixf (UDWtype);
 494 extern UWtype __fixunsxfSI (XFtype);
 495 extern XFtype __powixf2 (XFtype, int);
 496 extern XCtype __divxc3 (XFtype, XFtype, XFtype, XFtype);
 497 extern XCtype __mulxc3 (XFtype, XFtype, XFtype, XFtype);
 498 #endif
 499
 500 #if LIBGCC2_HAS_TF_MODE
 501 extern UDWtype __fixunstfDI (TFtype);
 502 extern DWtype __fixtfdi (TFtype);
 503 extern TFtype __floatditf (DWtype);
 504 extern TFtype __floatunditf (UDWtype);
 505 extern TFtype __powitf2 (TFtype, int);
 506 extern TCtype __divtc3 (TFtype, TFtype, TFtype, TFtype);
 507 extern TCtype __multc3 (TFtype, TFtype, TFtype, TFtype);
 508 #endif
 509 #define int bogus_type
 510
 511 /* DWstructs are pairs of Wtype values in the order determined by
 512    __BYTE_ORDER__.  */
 513
 514 #if __BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__
 515   struct DWstruct {Wtype high, low;};
 516 #else
 517   struct DWstruct {Wtype low, high;};
 518 #endif
 519
 520 /* We need this union to unpack/pack DImode values, since we don't have
 521    any arithmetic yet.  Incoming DImode parameters are stored into the
 522    `ll' field, and the unpacked result is read from the struct `s'.  */
 523
 524 typedef union
 525 {
 526   struct DWstruct s;
 527   DWtype ll;
 528 } DWunion;
 529
 530 /* Defined for L_popcount_tab.  Exported here because some targets may
 531    want to use it for their own versions of the __popcount builtins.  */
 532 extern const UQItype __popcount_tab[256];
 533
 534 /* Defined for L_clz.  Exported here because some targets may want to use
 535    it for their own versions of the __clz builtins.  It contains the bit
 536    position of the first set bit for the numbers 0 - 255.  This avoids the
 537    need for a separate table for the __ctz builtins.  */
 538 extern const UQItype __clz_tab[256];
 539
 540 #include "longlong.h"
 541
 542 #undef int
 543 extern int __clzDI2 (UDWtype);
 544 extern int __clzSI2 (UWtype);
 545 extern int __ctzSI2 (UWtype);
 546 extern int __ctzDI2 (UDWtype);
 547 extern int __clrsbSI2 (Wtype);
 548 extern int __clrsbDI2 (DWtype);
 549 extern int __ffsSI2 (UWtype);
 550 extern int __ffsDI2 (DWtype);
 551 extern int __popcountSI2 (UWtype);
 552 extern int __popcountDI2 (UDWtype);
 553 extern int __paritySI2 (UWtype);
 554 extern int __parityDI2 (UDWtype);
 555 #define int bogus_type
 556
 557 extern void __enable_execute_stack (void *);
 558
 559 extern void __strub_enter (void **);
 560 extern void __strub_update (void**);
 561 extern void __strub_leave (void **);
 562
 563 #ifndef HIDE_EXPORTS
 564 #pragma GCC visibility pop
 565 #endif
 566
 567 #endif /* ! GCC_LIBGCC2_H */