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 #ifndef MIN_UNITS_PER_WORD
 121 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
 122 #endif
 123
 124 /* In the first part of this file, we are interfacing to calls generated
 125    by the compiler itself.  These calls pass values into these routines
 126    which have very specific modes (rather than very specific types), and
 127    these compiler-generated calls also expect any return values to have
 128    very specific modes (rather than very specific types).  Thus, we need
 129    to avoid using regular C language type names in this part of the file
 130    because the sizes for those types can be configured to be anything.
 131    Instead we use the following special type names.  */
 132
 133 typedef          int QItype     __attribute__ ((mode (QI)));
 134 typedef unsigned int UQItype    __attribute__ ((mode (QI)));
 135 typedef          int HItype     __attribute__ ((mode (HI)));
 136 typedef unsigned int UHItype    __attribute__ ((mode (HI)));
 137 #if MIN_UNITS_PER_WORD > 1
 138 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1.  */
 139 typedef          int SItype     __attribute__ ((mode (SI)));
 140 typedef unsigned int USItype    __attribute__ ((mode (SI)));
 141 #if LONG_LONG_TYPE_SIZE > 32
 142 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2.  */
 143 typedef          int DItype     __attribute__ ((mode (DI)));
 144 typedef unsigned int UDItype    __attribute__ ((mode (DI)));
 145 #if MIN_UNITS_PER_WORD > 4
 146 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4.  */
 147 typedef          int TItype     __attribute__ ((mode (TI)));
 148 typedef unsigned int UTItype    __attribute__ ((mode (TI)));
 149 #endif
 150 #endif
 151 #endif
 152
 153 #if LIBGCC2_HAS_SF_MODE
 154 typedef         float SFtype    __attribute__ ((mode (SF)));
 155 typedef _Complex float SCtype   __attribute__ ((mode (SC)));
 156 #endif
 157 #if LIBGCC2_HAS_DF_MODE
 158 typedef         float DFtype    __attribute__ ((mode (DF)));
 159 typedef _Complex float DCtype   __attribute__ ((mode (DC)));
 160 #endif
 161 #if LIBGCC2_HAS_XF_MODE
 162 typedef         float XFtype    __attribute__ ((mode (XF)));
 163 typedef _Complex float XCtype   __attribute__ ((mode (XC)));
 164 #endif
 165 #if LIBGCC2_HAS_TF_MODE
 166 typedef         float TFtype    __attribute__ ((mode (TF)));
 167 typedef _Complex float TCtype   __attribute__ ((mode (TC)));
 168 #endif
 169
 170 typedef int word_type __attribute__ ((mode (__word__)));
 171
 172 /* Make sure that we don't accidentally use any normal C language built-in
 173    type names in the first part of this file.  Instead we want to use *only*
 174    the type names defined above.  The following macro definitions insure
 175    that if we *do* accidentally use some normal C language built-in type name,
 176    we will get a syntax error.  */
 177
 178 #define char bogus_type
 179 #define short bogus_type
 180 #define int bogus_type
 181 #define long bogus_type
 182 #define unsigned bogus_type
 183 #define float bogus_type
 184 #define double bogus_type
 185
 186 /* Versions prior to 3.4.4 were not taking into account the word size for
 187    the 5 trapping arithmetic functions absv, addv, subv, mulv and negv.  As
 188    a consequence, the si and di variants were always and the only ones emitted.
 189    To maintain backward compatibility, COMPAT_SIMODE_TRAPPING_ARITHMETIC is
 190    defined on platforms where it makes sense to still have the si variants
 191    emitted.  As a bonus, their implementation is now correct.  Note that the
 192    same mechanism should have been implemented for the di variants, but it
 193    turns out that no platform would define COMPAT_DIMODE_TRAPPING_ARITHMETIC
 194    if it existed.  */
 195
 196 #if MIN_UNITS_PER_WORD > 4
 197 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
 198 #define Wtype   DItype
 199 #define UWtype  UDItype
 200 #define HWtype  DItype
 201 #define UHWtype UDItype
 202 #define DWtype  TItype
 203 #define UDWtype UTItype
 204 #define __NW(a,b)       __ ## a ## di ## b
 205 #define __NDW(a,b)      __ ## a ## ti ## b
 206 #define COMPAT_SIMODE_TRAPPING_ARITHMETIC
 207 #elif MIN_UNITS_PER_WORD > 2 \
 208       || (MIN_UNITS_PER_WORD > 1 && LONG_LONG_TYPE_SIZE > 32)
 209 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 210 #define Wtype   SItype
 211 #define UWtype  USItype
 212 #define HWtype  SItype
 213 #define UHWtype USItype
 214 #define DWtype  DItype
 215 #define UDWtype UDItype
 216 #define __NW(a,b)       __ ## a ## si ## b
 217 #define __NDW(a,b)      __ ## a ## di ## b
 218 #elif MIN_UNITS_PER_WORD > 1
 219 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 220 #define Wtype   HItype
 221 #define UWtype  UHItype
 222 #define HWtype  HItype
 223 #define UHWtype UHItype
 224 #define DWtype  SItype
 225 #define UDWtype USItype
 226 #define __NW(a,b)       __ ## a ## hi ## b
 227 #define __NDW(a,b)      __ ## a ## si ## b
 228 #else
 229 #define W_TYPE_SIZE BITS_PER_UNIT
 230 #define Wtype   QItype
 231 #define UWtype  UQItype
 232 #define HWtype  QItype
 233 #define UHWtype UQItype
 234 #define DWtype  HItype
 235 #define UDWtype UHItype
 236 #define __NW(a,b)       __ ## a ## qi ## b
 237 #define __NDW(a,b)      __ ## a ## hi ## b
 238 #endif
 239
 240 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
 241 #define Wtype_MIN (- Wtype_MAX - 1)
 242
 243 #if W_TYPE_SIZE == 8
 244 # define Wtype_MAXp1_F  0x1p8f
 245 #elif W_TYPE_SIZE == 16
 246 # define Wtype_MAXp1_F  0x1p16f
 247 #elif W_TYPE_SIZE == 32
 248 # define Wtype_MAXp1_F  0x1p32f
 249 #elif W_TYPE_SIZE == 64
 250 # define Wtype_MAXp1_F  0x1p64f
 251 #else
 252 # error "expand the table"
 253 #endif
 254
 255 #define __muldi3        __NDW(mul,3)
 256 #define __divdi3        __NDW(div,3)
 257 #define __udivdi3       __NDW(udiv,3)
 258 #define __moddi3        __NDW(mod,3)
 259 #define __umoddi3       __NDW(umod,3)
 260 #define __negdi2        __NDW(neg,2)
 261 #define __lshrdi3       __NDW(lshr,3)
 262 #define __ashldi3       __NDW(ashl,3)
 263 #define __ashrdi3       __NDW(ashr,3)
 264 #define __cmpdi2        __NDW(cmp,2)
 265 #define __ucmpdi2       __NDW(ucmp,2)
 266 #define __udivmoddi4    __NDW(udivmod,4)
 267 #define __fixunstfDI    __NDW(fixunstf,)
 268 #define __fixtfdi       __NDW(fixtf,)
 269 #define __fixunsxfDI    __NDW(fixunsxf,)
 270 #define __fixxfdi       __NDW(fixxf,)
 271 #define __fixunsdfDI    __NDW(fixunsdf,)
 272 #define __fixdfdi       __NDW(fixdf,)
 273 #define __fixunssfDI    __NDW(fixunssf,)
 274 #define __fixsfdi       __NDW(fixsf,)
 275 #define __floatdixf     __NDW(float,xf)
 276 #define __floatditf     __NDW(float,tf)
 277 #define __floatdidf     __NDW(float,df)
 278 #define __floatdisf     __NDW(float,sf)
 279 #define __floatundixf   __NDW(floatun,xf)
 280 #define __floatunditf   __NDW(floatun,tf)
 281 #define __floatundidf   __NDW(floatun,df)
 282 #define __floatundisf   __NDW(floatun,sf)
 283 #define __fixunsxfSI    __NW(fixunsxf,)
 284 #define __fixunstfSI    __NW(fixunstf,)
 285 #define __fixunsdfSI    __NW(fixunsdf,)
 286 #define __fixunssfSI    __NW(fixunssf,)
 287
 288 #define __absvSI2       __NW(absv,2)
 289 #define __addvSI3       __NW(addv,3)
 290 #define __subvSI3       __NW(subv,3)
 291 #define __mulvSI3       __NW(mulv,3)
 292 #define __negvSI2       __NW(negv,2)
 293 #define __absvDI2       __NDW(absv,2)
 294 #define __addvDI3       __NDW(addv,3)
 295 #define __subvDI3       __NDW(subv,3)
 296 #define __mulvDI3       __NDW(mulv,3)
 297 #define __negvDI2       __NDW(negv,2)
 298
 299 #define __ffsSI2        __NW(ffs,2)
 300 #define __clzSI2        __NW(clz,2)
 301 #define __ctzSI2        __NW(ctz,2)
 302 #define __popcountSI2   __NW(popcount,2)
 303 #define __paritySI2     __NW(parity,2)
 304 #define __ffsDI2        __NDW(ffs,2)
 305 #define __clzDI2        __NDW(clz,2)
 306 #define __ctzDI2        __NDW(ctz,2)
 307 #define __popcountDI2   __NDW(popcount,2)
 308 #define __parityDI2     __NDW(parity,2)
 309
 310 extern DWtype __muldi3 (DWtype, DWtype);
 311 extern DWtype __divdi3 (DWtype, DWtype);
 312 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 313 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 314 extern DWtype __moddi3 (DWtype, DWtype);
 315
 316 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 317 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 318      !defined (L_umoddi3) && !defined (L_moddi3))
 319 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 320 #endif
 321
 322 /* __negdi2 is static inline when building other libgcc2 portions.  */
 323 #if !defined(L_divdi3) && !defined(L_moddi3)
 324 extern DWtype __negdi2 (DWtype);
 325 #endif
 326
 327 extern DWtype __lshrdi3 (DWtype, word_type);
 328 extern DWtype __ashldi3 (DWtype, word_type);
 329 extern DWtype __ashrdi3 (DWtype, word_type);
 330
 331 /* __udiv_w_sdiv is static inline when building other libgcc2 portions.  */
 332 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \
 333      !defined(L_umoddi3) && !defined(L_moddi3))
 334 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 335 #endif
 336
 337 extern word_type __cmpdi2 (DWtype, DWtype);
 338 extern word_type __ucmpdi2 (DWtype, DWtype);
 339
 340 extern Wtype __absvSI2 (Wtype);
 341 extern Wtype __addvSI3 (Wtype, Wtype);
 342 extern Wtype __subvSI3 (Wtype, Wtype);
 343 extern Wtype __mulvSI3 (Wtype, Wtype);
 344 extern Wtype __negvSI2 (Wtype);
 345 extern DWtype __absvDI2 (DWtype);
 346 extern DWtype __addvDI3 (DWtype, DWtype);
 347 extern DWtype __subvDI3 (DWtype, DWtype);
 348 extern DWtype __mulvDI3 (DWtype, DWtype);
 349 extern DWtype __negvDI2 (DWtype);
 350
 351 #ifdef COMPAT_SIMODE_TRAPPING_ARITHMETIC
 352 extern SItype __absvsi2 (SItype);
 353 extern SItype __addvsi3 (SItype, SItype);
 354 extern SItype __subvsi3 (SItype, SItype);
 355 extern SItype __mulvsi3 (SItype, SItype);
 356 extern SItype __negvsi2 (SItype);
 357 #endif /* COMPAT_SIMODE_TRAPPING_ARITHMETIC */
 358
 359 #undef int
 360 #if LIBGCC2_HAS_SF_MODE
 361 extern DWtype __fixsfdi (SFtype);
 362 extern SFtype __floatdisf (DWtype);
 363 extern SFtype __floatundisf (UDWtype);
 364 extern UWtype __fixunssfSI (SFtype);
 365 extern DWtype __fixunssfDI (SFtype);
 366 extern SFtype __powisf2 (SFtype, int);
 367 extern SCtype __divsc3 (SFtype, SFtype, SFtype, SFtype);
 368 extern SCtype __mulsc3 (SFtype, SFtype, SFtype, SFtype);
 369 #endif
 370 #if LIBGCC2_HAS_DF_MODE
 371 extern DWtype __fixdfdi (DFtype);
 372 extern DFtype __floatdidf (DWtype);
 373 extern DFtype __floatundidf (UDWtype);
 374 extern UWtype __fixunsdfSI (DFtype);
 375 extern DWtype __fixunsdfDI (DFtype);
 376 extern DFtype __powidf2 (DFtype, int);
 377 extern DCtype __divdc3 (DFtype, DFtype, DFtype, DFtype);
 378 extern DCtype __muldc3 (DFtype, DFtype, DFtype, DFtype);
 379 #endif
 380
 381 #if LIBGCC2_HAS_XF_MODE
 382 extern DWtype __fixxfdi (XFtype);
 383 extern DWtype __fixunsxfDI (XFtype);
 384 extern XFtype __floatdixf (DWtype);
 385 extern XFtype __floatundixf (UDWtype);
 386 extern UWtype __fixunsxfSI (XFtype);
 387 extern XFtype __powixf2 (XFtype, int);
 388 extern XCtype __divxc3 (XFtype, XFtype, XFtype, XFtype);
 389 extern XCtype __mulxc3 (XFtype, XFtype, XFtype, XFtype);
 390 #endif
 391
 392 #if LIBGCC2_HAS_TF_MODE
 393 extern DWtype __fixunstfDI (TFtype);
 394 extern DWtype __fixtfdi (TFtype);
 395 extern TFtype __floatditf (DWtype);
 396 extern TFtype __floatunditf (UDWtype);
 397 extern TFtype __powitf2 (TFtype, int);
 398 extern TCtype __divtc3 (TFtype, TFtype, TFtype, TFtype);
 399 extern TCtype __multc3 (TFtype, TFtype, TFtype, TFtype);
 400 #endif
 401 #define int bogus_type
 402
 403 /* DWstructs are pairs of Wtype values in the order determined by
 404    LIBGCC2_WORDS_BIG_ENDIAN.  */
 405
 406 #if LIBGCC2_WORDS_BIG_ENDIAN
 407   struct DWstruct {Wtype high, low;};
 408 #else
 409   struct DWstruct {Wtype low, high;};
 410 #endif
 411
 412 /* We need this union to unpack/pack DImode values, since we don't have
 413    any arithmetic yet.  Incoming DImode parameters are stored into the
 414    `ll' field, and the unpacked result is read from the struct `s'.  */
 415
 416 typedef union
 417 {
 418   struct DWstruct s;
 419   DWtype ll;
 420 } DWunion;
 421
 422 /* Defined for L_popcount_tab.  Exported here because some targets may
 423    want to use it for their own versions of the __popcount builtins.  */
 424 extern const UQItype __popcount_tab[256];
 425
 426 /* Defined for L_clz.  Exported here because some targets may want to use
 427    it for their own versions of the __clz builtins.  It contains the bit
 428    position of the first set bit for the numbers 0 - 255.  This avoids the
 429    need for a seperate table for the __ctz builtins.  */
 430 extern const UQItype __clz_tab[256];
 431
 432 #include "longlong.h"
 433
 434 #undef int
 435 extern int __clzDI2 (UDWtype);
 436 extern int __clzSI2 (UWtype);
 437 extern int __ctzSI2 (UWtype);
 438 extern int __ffsSI2 (UWtype);
 439 extern int __ffsDI2 (DWtype);
 440 extern int __ctzDI2 (UDWtype);
 441 extern int __popcountSI2 (UWtype);
 442 extern int __popcountDI2 (UDWtype);
 443 extern int __paritySI2 (UWtype);
 444 extern int __parityDI2 (UDWtype);
 445 #define int bogus_type
 446
 447 extern void __enable_execute_stack (void *);
 448
 449 #ifndef HIDE_EXPORTS
 450 #pragma GCC visibility pop
 451 #endif
 452
 453 #endif /* ! GCC_LIBGCC2_H */