gcc/libgcc2.h

   1 /* Header file for libgcc2.c.  */
   2 /* Copyright (C) 2000, 2001, 2004, 2005
   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 it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  20 02110-1301, USA.  */
  21
  22 /* As a special exception, if you link this library with other files,
  23    some of which are compiled with GCC, to produce an executable,
  24    this library does not by itself cause the resulting executable
  25    to be covered by the GNU General Public License.
  26    This exception does not however invalidate any other reasons why
  27    the executable file might be covered by the GNU General Public License.  */
  28
  29
  30 #ifndef GCC_LIBGCC2_H
  31 #define GCC_LIBGCC2_H
  32
  33 #ifndef HIDE_EXPORTS
  34 #pragma GCC visibility push(default)
  35 #endif
  36
  37 extern int __gcc_bcmp (const unsigned char *, const unsigned char *, size_t);
  38 extern void __clear_cache (char *, char *);
  39 extern void __eprintf (const char *, const char *, unsigned int, const char *)
  40   __attribute__ ((__noreturn__));
  41
  42 struct exception_descriptor;
  43 extern short int __get_eh_table_language (struct exception_descriptor *);
  44 extern short int __get_eh_table_version (struct exception_descriptor *);
  45
  46 /* Permit the tm.h file to select the endianness to use just for this
  47    file.  This is used when the endianness is determined when the
  48    compiler is run.  */
  49
  50 #ifndef LIBGCC2_WORDS_BIG_ENDIAN
  51 #define LIBGCC2_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
  52 #endif
  53
  54 #ifndef LIBGCC2_DOUBLE_TYPE_SIZE
  55 #define LIBGCC2_DOUBLE_TYPE_SIZE DOUBLE_TYPE_SIZE
  56 #endif
  57 #ifndef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
  58 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE LONG_DOUBLE_TYPE_SIZE
  59 #endif
  60
  61 #ifndef LIBGCC2_HAS_SF_MODE
  62 #define LIBGCC2_HAS_SF_MODE (BITS_PER_UNIT == 8)
  63 #endif
  64
  65 #ifndef LIBGCC2_HAS_DF_MODE
  66 #define LIBGCC2_HAS_DF_MODE \
  67   (BITS_PER_UNIT == 8 \
  68    && (LIBGCC2_DOUBLE_TYPE_SIZE == 64 \
  69        || LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 64))
  70 #endif
  71
  72 #ifndef LIBGCC2_HAS_XF_MODE
  73 #define LIBGCC2_HAS_XF_MODE \
  74   (BITS_PER_UNIT == 8 && LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 80)
  75 #endif
  76
  77 #ifndef LIBGCC2_HAS_TF_MODE
  78 #define LIBGCC2_HAS_TF_MODE \
  79   (BITS_PER_UNIT == 8 && LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128)
  80 #endif
  81
  82 #ifndef SF_SIZE
  83 #if LIBGCC2_HAS_SF_MODE
  84 #define SF_SIZE FLT_MANT_DIG
  85 #else
  86 #define SF_SIZE 0
  87 #endif
  88 #endif
  89
  90 #ifndef DF_SIZE
  91 #if LIBGCC2_HAS_DF_MODE
  92 #if LIBGCC2_DOUBLE_TYPE_SIZE == 64
  93 #define DF_SIZE DBL_MANT_DIG
  94 #elif LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 64
  95 #define DF_SIZE LDBL_MANT_DIG
  96 #else
  97 #define DF_SIZE 0
  98 #endif
  99 #else
 100 #define DF_SIZE 0
 101 #endif
 102 #endif
 103
 104 #ifndef XF_SIZE
 105 #if LIBGCC2_HAS_XF_MODE
 106 #define XF_SIZE LDBL_MANT_DIG
 107 #else
 108 #define XF_SIZE 0
 109 #endif
 110 #endif
 111
 112 #ifndef TF_SIZE
 113 #if LIBGCC2_HAS_TF_MODE
 114 #define TF_SIZE LDBL_MANT_DIG
 115 #else
 116 #define TF_SIZE 0
 117 #endif
 118 #endif
 119
 120 /* FIXME: This #ifdef probably should be removed, ie. enable the test
 121    for mips too.  */
 122 #ifdef __powerpc__
 123 #define IS_IBM_EXTENDED(SIZE) (SIZE == 106)
 124 #else
 125 #define IS_IBM_EXTENDED(SIZE) 0
 126 #endif
 127
 128 /* In the first part of this file, we are interfacing to calls generated
 129    by the compiler itself.  These calls pass values into these routines
 130    which have very specific modes (rather than very specific types), and
 131    these compiler-generated calls also expect any return values to have
 132    very specific modes (rather than very specific types).  Thus, we need
 133    to avoid using regular C language type names in this part of the file
 134    because the sizes for those types can be configured to be anything.
 135    Instead we use the following special type names.  */
 136
 137 typedef          int QItype     __attribute__ ((mode (QI)));
 138 typedef unsigned int UQItype    __attribute__ ((mode (QI)));
 139 typedef          int HItype     __attribute__ ((mode (HI)));
 140 typedef unsigned int UHItype    __attribute__ ((mode (HI)));
 141 #if MIN_UNITS_PER_WORD > 1
 142 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1.  */
 143 typedef          int SItype     __attribute__ ((mode (SI)));
 144 typedef unsigned int USItype    __attribute__ ((mode (SI)));
 145 #if LONG_LONG_TYPE_SIZE > 32
 146 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2.  */
 147 typedef          int DItype     __attribute__ ((mode (DI)));
 148 typedef unsigned int UDItype    __attribute__ ((mode (DI)));
 149 #if MIN_UNITS_PER_WORD > 4
 150 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4.  */
 151 typedef          int TItype     __attribute__ ((mode (TI)));
 152 typedef unsigned int UTItype    __attribute__ ((mode (TI)));
 153 #endif
 154 #endif
 155 #endif
 156
 157 #if LIBGCC2_HAS_SF_MODE
 158 typedef         float SFtype    __attribute__ ((mode (SF)));
 159 typedef _Complex float SCtype   __attribute__ ((mode (SC)));
 160 #endif
 161 #if LIBGCC2_HAS_DF_MODE
 162 typedef         float DFtype    __attribute__ ((mode (DF)));
 163 typedef _Complex float DCtype   __attribute__ ((mode (DC)));
 164 #endif
 165 #if LIBGCC2_HAS_XF_MODE
 166 typedef         float XFtype    __attribute__ ((mode (XF)));
 167 typedef _Complex float XCtype   __attribute__ ((mode (XC)));
 168 #endif
 169 #if LIBGCC2_HAS_TF_MODE
 170 typedef         float TFtype    __attribute__ ((mode (TF)));
 171 typedef _Complex float TCtype   __attribute__ ((mode (TC)));
 172 #endif
 173
 174 typedef int word_type __attribute__ ((mode (__word__)));
 175
 176 /* Make sure that we don't accidentally use any normal C language built-in
 177    type names in the first part of this file.  Instead we want to use *only*
 178    the type names defined above.  The following macro definitions insure
 179    that if we *do* accidentally use some normal C language built-in type name,
 180    we will get a syntax error.  */
 181
 182 #define char bogus_type
 183 #define short bogus_type
 184 #define int bogus_type
 185 #define long bogus_type
 186 #define unsigned bogus_type
 187 #define float bogus_type
 188 #define double bogus_type
 189
 190 /* Versions prior to 3.4.4 were not taking into account the word size for
 191    the 5 trapping arithmetic functions absv, addv, subv, mulv and negv.  As
 192    a consequence, the si and di variants were always and the only ones emitted.
 193    To maintain backward compatibility, COMPAT_SIMODE_TRAPPING_ARITHMETIC is
 194    defined on platforms where it makes sense to still have the si variants
 195    emitted.  As a bonus, their implementation is now correct.  Note that the
 196    same mechanism should have been implemented for the di variants, but it
 197    turns out that no platform would define COMPAT_DIMODE_TRAPPING_ARITHMETIC
 198    if it existed.  */
 199
 200 #if LIBGCC2_UNITS_PER_WORD == 8
 201 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
 202 #define Wtype   DItype
 203 #define UWtype  UDItype
 204 #define HWtype  DItype
 205 #define UHWtype UDItype
 206 #define DWtype  TItype
 207 #define UDWtype UTItype
 208 #define __NW(a,b)       __ ## a ## di ## b
 209 #define __NDW(a,b)      __ ## a ## ti ## b
 210 #define COMPAT_SIMODE_TRAPPING_ARITHMETIC
 211 #elif LIBGCC2_UNITS_PER_WORD == 4
 212 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 213 #define Wtype   SItype
 214 #define UWtype  USItype
 215 #define HWtype  SItype
 216 #define UHWtype USItype
 217 #define DWtype  DItype
 218 #define UDWtype UDItype
 219 #define __NW(a,b)       __ ## a ## si ## b
 220 #define __NDW(a,b)      __ ## a ## di ## b
 221 #elif LIBGCC2_UNITS_PER_WORD == 2
 222 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 223 #define Wtype   HItype
 224 #define UWtype  UHItype
 225 #define HWtype  HItype
 226 #define UHWtype UHItype
 227 #define DWtype  SItype
 228 #define UDWtype USItype
 229 #define __NW(a,b)       __ ## a ## hi ## b
 230 #define __NDW(a,b)      __ ## a ## si ## b
 231 #else
 232 #define W_TYPE_SIZE BITS_PER_UNIT
 233 #define Wtype   QItype
 234 #define UWtype  UQItype
 235 #define HWtype  QItype
 236 #define UHWtype UQItype
 237 #define DWtype  HItype
 238 #define UDWtype UHItype
 239 #define __NW(a,b)       __ ## a ## qi ## b
 240 #define __NDW(a,b)      __ ## a ## hi ## b
 241 #endif
 242
 243 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
 244 #define Wtype_MIN (- Wtype_MAX - 1)
 245
 246 #if W_TYPE_SIZE == 8
 247 # define Wtype_MAXp1_F  0x1p8f
 248 #elif W_TYPE_SIZE == 16
 249 # define Wtype_MAXp1_F  0x1p16f
 250 #elif W_TYPE_SIZE == 32
 251 # define Wtype_MAXp1_F  0x1p32f
 252 #elif W_TYPE_SIZE == 64
 253 # define Wtype_MAXp1_F  0x1p64f
 254 #else
 255 # error "expand the table"
 256 #endif
 257
 258 #define __muldi3        __NDW(mul,3)
 259 #define __divdi3        __NDW(div,3)
 260 #define __udivdi3       __NDW(udiv,3)
 261 #define __moddi3        __NDW(mod,3)
 262 #define __umoddi3       __NDW(umod,3)
 263 #define __negdi2        __NDW(neg,2)
 264 #define __lshrdi3       __NDW(lshr,3)
 265 #define __ashldi3       __NDW(ashl,3)
 266 #define __ashrdi3       __NDW(ashr,3)
 267 #define __cmpdi2        __NDW(cmp,2)
 268 #define __ucmpdi2       __NDW(ucmp,2)
 269 #define __udivmoddi4    __NDW(udivmod,4)
 270 #define __fixunstfDI    __NDW(fixunstf,)
 271 #define __fixtfdi       __NDW(fixtf,)
 272 #define __fixunsxfDI    __NDW(fixunsxf,)
 273 #define __fixxfdi       __NDW(fixxf,)
 274 #define __fixunsdfDI    __NDW(fixunsdf,)
 275 #define __fixdfdi       __NDW(fixdf,)
 276 #define __fixunssfDI    __NDW(fixunssf,)
 277 #define __fixsfdi       __NDW(fixsf,)
 278 #define __floatdixf     __NDW(float,xf)
 279 #define __floatditf     __NDW(float,tf)
 280 #define __floatdidf     __NDW(float,df)
 281 #define __floatdisf     __NDW(float,sf)
 282 #define __floatundixf   __NDW(floatun,xf)
 283 #define __floatunditf   __NDW(floatun,tf)
 284 #define __floatundidf   __NDW(floatun,df)
 285 #define __floatundisf   __NDW(floatun,sf)
 286 #define __fixunsxfSI    __NW(fixunsxf,)
 287 #define __fixunstfSI    __NW(fixunstf,)
 288 #define __fixunsdfSI    __NW(fixunsdf,)
 289 #define __fixunssfSI    __NW(fixunssf,)
 290
 291 #define __absvSI2       __NW(absv,2)
 292 #define __addvSI3       __NW(addv,3)
 293 #define __subvSI3       __NW(subv,3)
 294 #define __mulvSI3       __NW(mulv,3)
 295 #define __negvSI2       __NW(negv,2)
 296 #define __absvDI2       __NDW(absv,2)
 297 #define __addvDI3       __NDW(addv,3)
 298 #define __subvDI3       __NDW(subv,3)
 299 #define __mulvDI3       __NDW(mulv,3)
 300 #define __negvDI2       __NDW(negv,2)
 301
 302 #define __ffsSI2        __NW(ffs,2)
 303 #define __clzSI2        __NW(clz,2)
 304 #define __ctzSI2        __NW(ctz,2)
 305 #define __popcountSI2   __NW(popcount,2)
 306 #define __paritySI2     __NW(parity,2)
 307 #define __ffsDI2        __NDW(ffs,2)
 308 #define __clzDI2        __NDW(clz,2)
 309 #define __ctzDI2        __NDW(ctz,2)
 310 #define __popcountDI2   __NDW(popcount,2)
 311 #define __parityDI2     __NDW(parity,2)
 312
 313 extern DWtype __muldi3 (DWtype, DWtype);
 314 extern DWtype __divdi3 (DWtype, DWtype);
 315 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 316 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 317 extern DWtype __moddi3 (DWtype, DWtype);
 318
 319 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 320 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 321      !defined (L_umoddi3) && !defined (L_moddi3))
 322 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 323 #endif
 324
 325 /* __negdi2 is static inline when building other libgcc2 portions.  */
 326 #if !defined(L_divdi3) && !defined(L_moddi3)
 327 extern DWtype __negdi2 (DWtype);
 328 #endif
 329
 330 extern DWtype __lshrdi3 (DWtype, word_type);
 331 extern DWtype __ashldi3 (DWtype, word_type);
 332 extern DWtype __ashrdi3 (DWtype, word_type);
 333
 334 /* __udiv_w_sdiv is static inline when building other libgcc2 portions.  */
 335 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \
 336      !defined(L_umoddi3) && !defined(L_moddi3))
 337 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 338 #endif
 339
 340 extern word_type __cmpdi2 (DWtype, DWtype);
 341 extern word_type __ucmpdi2 (DWtype, DWtype);
 342
 343 extern Wtype __absvSI2 (Wtype);
 344 extern Wtype __addvSI3 (Wtype, Wtype);
 345 extern Wtype __subvSI3 (Wtype, Wtype);
 346 extern Wtype __mulvSI3 (Wtype, Wtype);
 347 extern Wtype __negvSI2 (Wtype);
 348 extern DWtype __absvDI2 (DWtype);
 349 extern DWtype __addvDI3 (DWtype, DWtype);
 350 extern DWtype __subvDI3 (DWtype, DWtype);
 351 extern DWtype __mulvDI3 (DWtype, DWtype);
 352 extern DWtype __negvDI2 (DWtype);
 353
 354 #ifdef COMPAT_SIMODE_TRAPPING_ARITHMETIC
 355 extern SItype __absvsi2 (SItype);
 356 extern SItype __addvsi3 (SItype, SItype);
 357 extern SItype __subvsi3 (SItype, SItype);
 358 extern SItype __mulvsi3 (SItype, SItype);
 359 extern SItype __negvsi2 (SItype);
 360 #endif /* COMPAT_SIMODE_TRAPPING_ARITHMETIC */
 361
 362 #undef int
 363 #if LIBGCC2_HAS_SF_MODE
 364 extern DWtype __fixsfdi (SFtype);
 365 extern SFtype __floatdisf (DWtype);
 366 extern SFtype __floatundisf (UDWtype);
 367 extern UWtype __fixunssfSI (SFtype);
 368 extern DWtype __fixunssfDI (SFtype);
 369 extern SFtype __powisf2 (SFtype, int);
 370 extern SCtype __divsc3 (SFtype, SFtype, SFtype, SFtype);
 371 extern SCtype __mulsc3 (SFtype, SFtype, SFtype, SFtype);
 372 #endif
 373 #if LIBGCC2_HAS_DF_MODE
 374 extern DWtype __fixdfdi (DFtype);
 375 extern DFtype __floatdidf (DWtype);
 376 extern DFtype __floatundidf (UDWtype);
 377 extern UWtype __fixunsdfSI (DFtype);
 378 extern DWtype __fixunsdfDI (DFtype);
 379 extern DFtype __powidf2 (DFtype, int);
 380 extern DCtype __divdc3 (DFtype, DFtype, DFtype, DFtype);
 381 extern DCtype __muldc3 (DFtype, DFtype, DFtype, DFtype);
 382 #endif
 383
 384 #if LIBGCC2_HAS_XF_MODE
 385 extern DWtype __fixxfdi (XFtype);
 386 extern DWtype __fixunsxfDI (XFtype);
 387 extern XFtype __floatdixf (DWtype);
 388 extern XFtype __floatundixf (UDWtype);
 389 extern UWtype __fixunsxfSI (XFtype);
 390 extern XFtype __powixf2 (XFtype, int);
 391 extern XCtype __divxc3 (XFtype, XFtype, XFtype, XFtype);
 392 extern XCtype __mulxc3 (XFtype, XFtype, XFtype, XFtype);
 393 #endif
 394
 395 #if LIBGCC2_HAS_TF_MODE
 396 extern DWtype __fixunstfDI (TFtype);
 397 extern DWtype __fixtfdi (TFtype);
 398 extern TFtype __floatditf (DWtype);
 399 extern TFtype __floatunditf (UDWtype);
 400 extern TFtype __powitf2 (TFtype, int);
 401 extern TCtype __divtc3 (TFtype, TFtype, TFtype, TFtype);
 402 extern TCtype __multc3 (TFtype, TFtype, TFtype, TFtype);
 403 #endif
 404 #define int bogus_type
 405
 406 /* DWstructs are pairs of Wtype values in the order determined by
 407    LIBGCC2_WORDS_BIG_ENDIAN.  */
 408
 409 #if LIBGCC2_WORDS_BIG_ENDIAN
 410   struct DWstruct {Wtype high, low;};
 411 #else
 412   struct DWstruct {Wtype low, high;};
 413 #endif
 414
 415 /* We need this union to unpack/pack DImode values, since we don't have
 416    any arithmetic yet.  Incoming DImode parameters are stored into the
 417    `ll' field, and the unpacked result is read from the struct `s'.  */
 418
 419 typedef union
 420 {
 421   struct DWstruct s;
 422   DWtype ll;
 423 } DWunion;
 424
 425 /* Defined for L_popcount_tab.  Exported here because some targets may
 426    want to use it for their own versions of the __popcount builtins.  */
 427 extern const UQItype __popcount_tab[256];
 428
 429 /* Defined for L_clz.  Exported here because some targets may want to use
 430    it for their own versions of the __clz builtins.  It contains the bit
 431    position of the first set bit for the numbers 0 - 255.  This avoids the
 432    need for a separate table for the __ctz builtins.  */
 433 extern const UQItype __clz_tab[256];
 434
 435 #include "longlong.h"
 436
 437 #undef int
 438 extern int __clzDI2 (UDWtype);
 439 extern int __clzSI2 (UWtype);
 440 extern int __ctzSI2 (UWtype);
 441 extern int __ffsSI2 (UWtype);
 442 extern int __ffsDI2 (DWtype);
 443 extern int __ctzDI2 (UDWtype);
 444 extern int __popcountSI2 (UWtype);
 445 extern int __popcountDI2 (UDWtype);
 446 extern int __paritySI2 (UWtype);
 447 extern int __parityDI2 (UDWtype);
 448 #define int bogus_type
 449
 450 extern void __enable_execute_stack (void *);
 451
 452 #ifndef HIDE_EXPORTS
 453 #pragma GCC visibility pop
 454 #endif
 455
 456 #endif /* ! GCC_LIBGCC2_H */