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 #ifndef MIN_UNITS_PER_WORD
 129 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
 130 #endif
 131
 132 /* In the first part of this file, we are interfacing to calls generated
 133    by the compiler itself.  These calls pass values into these routines
 134    which have very specific modes (rather than very specific types), and
 135    these compiler-generated calls also expect any return values to have
 136    very specific modes (rather than very specific types).  Thus, we need
 137    to avoid using regular C language type names in this part of the file
 138    because the sizes for those types can be configured to be anything.
 139    Instead we use the following special type names.  */
 140
 141 typedef          int QItype     __attribute__ ((mode (QI)));
 142 typedef unsigned int UQItype    __attribute__ ((mode (QI)));
 143 typedef          int HItype     __attribute__ ((mode (HI)));
 144 typedef unsigned int UHItype    __attribute__ ((mode (HI)));
 145 #if MIN_UNITS_PER_WORD > 1
 146 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1.  */
 147 typedef          int SItype     __attribute__ ((mode (SI)));
 148 typedef unsigned int USItype    __attribute__ ((mode (SI)));
 149 #if LONG_LONG_TYPE_SIZE > 32
 150 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2.  */
 151 typedef          int DItype     __attribute__ ((mode (DI)));
 152 typedef unsigned int UDItype    __attribute__ ((mode (DI)));
 153 #if MIN_UNITS_PER_WORD > 4
 154 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4.  */
 155 typedef          int TItype     __attribute__ ((mode (TI)));
 156 typedef unsigned int UTItype    __attribute__ ((mode (TI)));
 157 #endif
 158 #endif
 159 #endif
 160
 161 #if LIBGCC2_HAS_SF_MODE
 162 typedef         float SFtype    __attribute__ ((mode (SF)));
 163 typedef _Complex float SCtype   __attribute__ ((mode (SC)));
 164 #endif
 165 #if LIBGCC2_HAS_DF_MODE
 166 typedef         float DFtype    __attribute__ ((mode (DF)));
 167 typedef _Complex float DCtype   __attribute__ ((mode (DC)));
 168 #endif
 169 #if LIBGCC2_HAS_XF_MODE
 170 typedef         float XFtype    __attribute__ ((mode (XF)));
 171 typedef _Complex float XCtype   __attribute__ ((mode (XC)));
 172 #endif
 173 #if LIBGCC2_HAS_TF_MODE
 174 typedef         float TFtype    __attribute__ ((mode (TF)));
 175 typedef _Complex float TCtype   __attribute__ ((mode (TC)));
 176 #endif
 177
 178 typedef int word_type __attribute__ ((mode (__word__)));
 179
 180 /* Make sure that we don't accidentally use any normal C language built-in
 181    type names in the first part of this file.  Instead we want to use *only*
 182    the type names defined above.  The following macro definitions insure
 183    that if we *do* accidentally use some normal C language built-in type name,
 184    we will get a syntax error.  */
 185
 186 #define char bogus_type
 187 #define short bogus_type
 188 #define int bogus_type
 189 #define long bogus_type
 190 #define unsigned bogus_type
 191 #define float bogus_type
 192 #define double bogus_type
 193
 194 /* Versions prior to 3.4.4 were not taking into account the word size for
 195    the 5 trapping arithmetic functions absv, addv, subv, mulv and negv.  As
 196    a consequence, the si and di variants were always and the only ones emitted.
 197    To maintain backward compatibility, COMPAT_SIMODE_TRAPPING_ARITHMETIC is
 198    defined on platforms where it makes sense to still have the si variants
 199    emitted.  As a bonus, their implementation is now correct.  Note that the
 200    same mechanism should have been implemented for the di variants, but it
 201    turns out that no platform would define COMPAT_DIMODE_TRAPPING_ARITHMETIC
 202    if it existed.  */
 203
 204 #if MIN_UNITS_PER_WORD > 4
 205 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
 206 #define Wtype   DItype
 207 #define UWtype  UDItype
 208 #define HWtype  DItype
 209 #define UHWtype UDItype
 210 #define DWtype  TItype
 211 #define UDWtype UTItype
 212 #define __NW(a,b)       __ ## a ## di ## b
 213 #define __NDW(a,b)      __ ## a ## ti ## b
 214 #define COMPAT_SIMODE_TRAPPING_ARITHMETIC
 215 #elif MIN_UNITS_PER_WORD > 2 \
 216       || (MIN_UNITS_PER_WORD > 1 && LONG_LONG_TYPE_SIZE > 32)
 217 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 218 #define Wtype   SItype
 219 #define UWtype  USItype
 220 #define HWtype  SItype
 221 #define UHWtype USItype
 222 #define DWtype  DItype
 223 #define UDWtype UDItype
 224 #define __NW(a,b)       __ ## a ## si ## b
 225 #define __NDW(a,b)      __ ## a ## di ## b
 226 #elif MIN_UNITS_PER_WORD > 1
 227 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 228 #define Wtype   HItype
 229 #define UWtype  UHItype
 230 #define HWtype  HItype
 231 #define UHWtype UHItype
 232 #define DWtype  SItype
 233 #define UDWtype USItype
 234 #define __NW(a,b)       __ ## a ## hi ## b
 235 #define __NDW(a,b)      __ ## a ## si ## b
 236 #else
 237 #define W_TYPE_SIZE BITS_PER_UNIT
 238 #define Wtype   QItype
 239 #define UWtype  UQItype
 240 #define HWtype  QItype
 241 #define UHWtype UQItype
 242 #define DWtype  HItype
 243 #define UDWtype UHItype
 244 #define __NW(a,b)       __ ## a ## qi ## b
 245 #define __NDW(a,b)      __ ## a ## hi ## b
 246 #endif
 247
 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 __popcountSI2   __NW(popcount,2)
 311 #define __paritySI2     __NW(parity,2)
 312 #define __ffsDI2        __NDW(ffs,2)
 313 #define __clzDI2        __NDW(clz,2)
 314 #define __ctzDI2        __NDW(ctz,2)
 315 #define __popcountDI2   __NDW(popcount,2)
 316 #define __parityDI2     __NDW(parity,2)
 317
 318 extern DWtype __muldi3 (DWtype, DWtype);
 319 extern DWtype __divdi3 (DWtype, DWtype);
 320 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 321 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 322 extern DWtype __moddi3 (DWtype, DWtype);
 323
 324 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 325 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 326      !defined (L_umoddi3) && !defined (L_moddi3))
 327 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 328 #endif
 329
 330 /* __negdi2 is static inline when building other libgcc2 portions.  */
 331 #if !defined(L_divdi3) && !defined(L_moddi3)
 332 extern DWtype __negdi2 (DWtype);
 333 #endif
 334
 335 extern DWtype __lshrdi3 (DWtype, word_type);
 336 extern DWtype __ashldi3 (DWtype, word_type);
 337 extern DWtype __ashrdi3 (DWtype, word_type);
 338
 339 /* __udiv_w_sdiv is static inline when building other libgcc2 portions.  */
 340 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \
 341      !defined(L_umoddi3) && !defined(L_moddi3))
 342 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 343 #endif
 344
 345 extern word_type __cmpdi2 (DWtype, DWtype);
 346 extern word_type __ucmpdi2 (DWtype, DWtype);
 347
 348 extern Wtype __absvSI2 (Wtype);
 349 extern Wtype __addvSI3 (Wtype, Wtype);
 350 extern Wtype __subvSI3 (Wtype, Wtype);
 351 extern Wtype __mulvSI3 (Wtype, Wtype);
 352 extern Wtype __negvSI2 (Wtype);
 353 extern DWtype __absvDI2 (DWtype);
 354 extern DWtype __addvDI3 (DWtype, DWtype);
 355 extern DWtype __subvDI3 (DWtype, DWtype);
 356 extern DWtype __mulvDI3 (DWtype, DWtype);
 357 extern DWtype __negvDI2 (DWtype);
 358
 359 #ifdef COMPAT_SIMODE_TRAPPING_ARITHMETIC
 360 extern SItype __absvsi2 (SItype);
 361 extern SItype __addvsi3 (SItype, SItype);
 362 extern SItype __subvsi3 (SItype, SItype);
 363 extern SItype __mulvsi3 (SItype, SItype);
 364 extern SItype __negvsi2 (SItype);
 365 #endif /* COMPAT_SIMODE_TRAPPING_ARITHMETIC */
 366
 367 #undef int
 368 #if LIBGCC2_HAS_SF_MODE
 369 extern DWtype __fixsfdi (SFtype);
 370 extern SFtype __floatdisf (DWtype);
 371 extern SFtype __floatundisf (UDWtype);
 372 extern UWtype __fixunssfSI (SFtype);
 373 extern DWtype __fixunssfDI (SFtype);
 374 extern SFtype __powisf2 (SFtype, int);
 375 extern SCtype __divsc3 (SFtype, SFtype, SFtype, SFtype);
 376 extern SCtype __mulsc3 (SFtype, SFtype, SFtype, SFtype);
 377 #endif
 378 #if LIBGCC2_HAS_DF_MODE
 379 extern DWtype __fixdfdi (DFtype);
 380 extern DFtype __floatdidf (DWtype);
 381 extern DFtype __floatundidf (UDWtype);
 382 extern UWtype __fixunsdfSI (DFtype);
 383 extern DWtype __fixunsdfDI (DFtype);
 384 extern DFtype __powidf2 (DFtype, int);
 385 extern DCtype __divdc3 (DFtype, DFtype, DFtype, DFtype);
 386 extern DCtype __muldc3 (DFtype, DFtype, DFtype, DFtype);
 387 #endif
 388
 389 #if LIBGCC2_HAS_XF_MODE
 390 extern DWtype __fixxfdi (XFtype);
 391 extern DWtype __fixunsxfDI (XFtype);
 392 extern XFtype __floatdixf (DWtype);
 393 extern XFtype __floatundixf (UDWtype);
 394 extern UWtype __fixunsxfSI (XFtype);
 395 extern XFtype __powixf2 (XFtype, int);
 396 extern XCtype __divxc3 (XFtype, XFtype, XFtype, XFtype);
 397 extern XCtype __mulxc3 (XFtype, XFtype, XFtype, XFtype);
 398 #endif
 399
 400 #if LIBGCC2_HAS_TF_MODE
 401 extern DWtype __fixunstfDI (TFtype);
 402 extern DWtype __fixtfdi (TFtype);
 403 extern TFtype __floatditf (DWtype);
 404 extern TFtype __floatunditf (UDWtype);
 405 extern TFtype __powitf2 (TFtype, int);
 406 extern TCtype __divtc3 (TFtype, TFtype, TFtype, TFtype);
 407 extern TCtype __multc3 (TFtype, TFtype, TFtype, TFtype);
 408 #endif
 409 #define int bogus_type
 410
 411 /* DWstructs are pairs of Wtype values in the order determined by
 412    LIBGCC2_WORDS_BIG_ENDIAN.  */
 413
 414 #if LIBGCC2_WORDS_BIG_ENDIAN
 415   struct DWstruct {Wtype high, low;};
 416 #else
 417   struct DWstruct {Wtype low, high;};
 418 #endif
 419
 420 /* We need this union to unpack/pack DImode values, since we don't have
 421    any arithmetic yet.  Incoming DImode parameters are stored into the
 422    `ll' field, and the unpacked result is read from the struct `s'.  */
 423
 424 typedef union
 425 {
 426   struct DWstruct s;
 427   DWtype ll;
 428 } DWunion;
 429
 430 /* Defined for L_popcount_tab.  Exported here because some targets may
 431    want to use it for their own versions of the __popcount builtins.  */
 432 extern const UQItype __popcount_tab[256];
 433
 434 /* Defined for L_clz.  Exported here because some targets may want to use
 435    it for their own versions of the __clz builtins.  It contains the bit
 436    position of the first set bit for the numbers 0 - 255.  This avoids the
 437    need for a seperate table for the __ctz builtins.  */
 438 extern const UQItype __clz_tab[256];
 439
 440 #include "longlong.h"
 441
 442 #undef int
 443 extern int __clzDI2 (UDWtype);
 444 extern int __clzSI2 (UWtype);
 445 extern int __ctzSI2 (UWtype);
 446 extern int __ffsSI2 (UWtype);
 447 extern int __ffsDI2 (DWtype);
 448 extern int __ctzDI2 (UDWtype);
 449 extern int __popcountSI2 (UWtype);
 450 extern int __popcountDI2 (UDWtype);
 451 extern int __paritySI2 (UWtype);
 452 extern int __parityDI2 (UDWtype);
 453 #define int bogus_type
 454
 455 extern void __enable_execute_stack (void *);
 456
 457 #ifndef HIDE_EXPORTS
 458 #pragma GCC visibility pop
 459 #endif
 460
 461 #endif /* ! GCC_LIBGCC2_H */