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 MIN_UNITS_PER_WORD
  83 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
  84 #endif
  85
  86 /* In the first part of this file, we are interfacing to calls generated
  87    by the compiler itself.  These calls pass values into these routines
  88    which have very specific modes (rather than very specific types), and
  89    these compiler-generated calls also expect any return values to have
  90    very specific modes (rather than very specific types).  Thus, we need
  91    to avoid using regular C language type names in this part of the file
  92    because the sizes for those types can be configured to be anything.
  93    Instead we use the following special type names.  */
  94
  95 typedef          int QItype     __attribute__ ((mode (QI)));
  96 typedef unsigned int UQItype    __attribute__ ((mode (QI)));
  97 typedef          int HItype     __attribute__ ((mode (HI)));
  98 typedef unsigned int UHItype    __attribute__ ((mode (HI)));
  99 #if MIN_UNITS_PER_WORD > 1
 100 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1.  */
 101 typedef          int SItype     __attribute__ ((mode (SI)));
 102 typedef unsigned int USItype    __attribute__ ((mode (SI)));
 103 #if LONG_LONG_TYPE_SIZE > 32
 104 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2.  */
 105 typedef          int DItype     __attribute__ ((mode (DI)));
 106 typedef unsigned int UDItype    __attribute__ ((mode (DI)));
 107 #if MIN_UNITS_PER_WORD > 4
 108 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4.  */
 109 typedef          int TItype     __attribute__ ((mode (TI)));
 110 typedef unsigned int UTItype    __attribute__ ((mode (TI)));
 111 #endif
 112 #endif
 113 #endif
 114
 115 #if LIBGCC2_HAS_SF_MODE
 116 typedef         float SFtype    __attribute__ ((mode (SF)));
 117 typedef _Complex float SCtype   __attribute__ ((mode (SC)));
 118 #endif
 119 #if LIBGCC2_HAS_DF_MODE
 120 typedef         float DFtype    __attribute__ ((mode (DF)));
 121 typedef _Complex float DCtype   __attribute__ ((mode (DC)));
 122 #endif
 123 #if LIBGCC2_HAS_XF_MODE
 124 typedef         float XFtype    __attribute__ ((mode (XF)));
 125 typedef _Complex float XCtype   __attribute__ ((mode (XC)));
 126 #endif
 127 #if LIBGCC2_HAS_TF_MODE
 128 typedef         float TFtype    __attribute__ ((mode (TF)));
 129 typedef _Complex float TCtype   __attribute__ ((mode (TC)));
 130 #endif
 131
 132 typedef int word_type __attribute__ ((mode (__word__)));
 133
 134 /* Make sure that we don't accidentally use any normal C language built-in
 135    type names in the first part of this file.  Instead we want to use *only*
 136    the type names defined above.  The following macro definitions insure
 137    that if we *do* accidentally use some normal C language built-in type name,
 138    we will get a syntax error.  */
 139
 140 #define char bogus_type
 141 #define short bogus_type
 142 #define int bogus_type
 143 #define long bogus_type
 144 #define unsigned bogus_type
 145 #define float bogus_type
 146 #define double bogus_type
 147
 148 /* Versions prior to 3.4.4 were not taking into account the word size for
 149    the 5 trapping arithmetic functions absv, addv, subv, mulv and negv.  As
 150    a consequence, the si and di variants were always and the only ones emitted.
 151    To maintain backward compatibility, COMPAT_SIMODE_TRAPPING_ARITHMETIC is
 152    defined on platforms where it makes sense to still have the si variants
 153    emitted.  As a bonus, their implementation is now correct.  Note that the
 154    same mechanism should have been implemented for the di variants, but it
 155    turns out that no platform would define COMPAT_DIMODE_TRAPPING_ARITHMETIC
 156    if it existed.  */
 157
 158 #if MIN_UNITS_PER_WORD > 4
 159 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
 160 #define Wtype   DItype
 161 #define UWtype  UDItype
 162 #define HWtype  DItype
 163 #define UHWtype UDItype
 164 #define DWtype  TItype
 165 #define UDWtype UTItype
 166 #define __NW(a,b)       __ ## a ## di ## b
 167 #define __NDW(a,b)      __ ## a ## ti ## b
 168 #define COMPAT_SIMODE_TRAPPING_ARITHMETIC
 169 #elif MIN_UNITS_PER_WORD > 2 \
 170       || (MIN_UNITS_PER_WORD > 1 && LONG_LONG_TYPE_SIZE > 32)
 171 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 172 #define Wtype   SItype
 173 #define UWtype  USItype
 174 #define HWtype  SItype
 175 #define UHWtype USItype
 176 #define DWtype  DItype
 177 #define UDWtype UDItype
 178 #define __NW(a,b)       __ ## a ## si ## b
 179 #define __NDW(a,b)      __ ## a ## di ## b
 180 #elif MIN_UNITS_PER_WORD > 1
 181 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 182 #define Wtype   HItype
 183 #define UWtype  UHItype
 184 #define HWtype  HItype
 185 #define UHWtype UHItype
 186 #define DWtype  SItype
 187 #define UDWtype USItype
 188 #define __NW(a,b)       __ ## a ## hi ## b
 189 #define __NDW(a,b)      __ ## a ## si ## b
 190 #else
 191 #define W_TYPE_SIZE BITS_PER_UNIT
 192 #define Wtype   QItype
 193 #define UWtype  UQItype
 194 #define HWtype  QItype
 195 #define UHWtype UQItype
 196 #define DWtype  HItype
 197 #define UDWtype UHItype
 198 #define __NW(a,b)       __ ## a ## qi ## b
 199 #define __NDW(a,b)      __ ## a ## hi ## b
 200 #endif
 201
 202 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
 203 #define Wtype_MIN (- Wtype_MAX - 1)
 204
 205 #if W_TYPE_SIZE == 8
 206 # define Wtype_MAXp1_F  0x1p8f
 207 #elif W_TYPE_SIZE == 16
 208 # define Wtype_MAXp1_F  0x1p16f
 209 #elif W_TYPE_SIZE == 32
 210 # define Wtype_MAXp1_F  0x1p32f
 211 #elif W_TYPE_SIZE == 64
 212 # define Wtype_MAXp1_F  0x1p64f
 213 #else
 214 # error "expand the table"
 215 #endif
 216
 217 #define __muldi3        __NDW(mul,3)
 218 #define __divdi3        __NDW(div,3)
 219 #define __udivdi3       __NDW(udiv,3)
 220 #define __moddi3        __NDW(mod,3)
 221 #define __umoddi3       __NDW(umod,3)
 222 #define __negdi2        __NDW(neg,2)
 223 #define __lshrdi3       __NDW(lshr,3)
 224 #define __ashldi3       __NDW(ashl,3)
 225 #define __ashrdi3       __NDW(ashr,3)
 226 #define __cmpdi2        __NDW(cmp,2)
 227 #define __ucmpdi2       __NDW(ucmp,2)
 228 #define __udivmoddi4    __NDW(udivmod,4)
 229 #define __fixunstfDI    __NDW(fixunstf,)
 230 #define __fixtfdi       __NDW(fixtf,)
 231 #define __fixunsxfDI    __NDW(fixunsxf,)
 232 #define __fixxfdi       __NDW(fixxf,)
 233 #define __fixunsdfDI    __NDW(fixunsdf,)
 234 #define __fixdfdi       __NDW(fixdf,)
 235 #define __fixunssfDI    __NDW(fixunssf,)
 236 #define __fixsfdi       __NDW(fixsf,)
 237 #define __floatdixf     __NDW(float,xf)
 238 #define __floatditf     __NDW(float,tf)
 239 #define __floatdidf     __NDW(float,df)
 240 #define __floatdisf     __NDW(float,sf)
 241 #define __floatundixf   __NDW(floatun,xf)
 242 #define __floatunditf   __NDW(floatun,tf)
 243 #define __floatundidf   __NDW(floatun,df)
 244 #define __floatundisf   __NDW(floatun,sf)
 245 #define __fixunsxfSI    __NW(fixunsxf,)
 246 #define __fixunstfSI    __NW(fixunstf,)
 247 #define __fixunsdfSI    __NW(fixunsdf,)
 248 #define __fixunssfSI    __NW(fixunssf,)
 249
 250 #define __absvSI2       __NW(absv,2)
 251 #define __addvSI3       __NW(addv,3)
 252 #define __subvSI3       __NW(subv,3)
 253 #define __mulvSI3       __NW(mulv,3)
 254 #define __negvSI2       __NW(negv,2)
 255 #define __absvDI2       __NDW(absv,2)
 256 #define __addvDI3       __NDW(addv,3)
 257 #define __subvDI3       __NDW(subv,3)
 258 #define __mulvDI3       __NDW(mulv,3)
 259 #define __negvDI2       __NDW(negv,2)
 260
 261 #define __ffsSI2        __NW(ffs,2)
 262 #define __clzSI2        __NW(clz,2)
 263 #define __ctzSI2        __NW(ctz,2)
 264 #define __popcountSI2   __NW(popcount,2)
 265 #define __paritySI2     __NW(parity,2)
 266 #define __ffsDI2        __NDW(ffs,2)
 267 #define __clzDI2        __NDW(clz,2)
 268 #define __ctzDI2        __NDW(ctz,2)
 269 #define __popcountDI2   __NDW(popcount,2)
 270 #define __parityDI2     __NDW(parity,2)
 271
 272 extern DWtype __muldi3 (DWtype, DWtype);
 273 extern DWtype __divdi3 (DWtype, DWtype);
 274 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 275 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 276 extern DWtype __moddi3 (DWtype, DWtype);
 277
 278 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 279 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 280      !defined (L_umoddi3) && !defined (L_moddi3))
 281 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 282 #endif
 283
 284 /* __negdi2 is static inline when building other libgcc2 portions.  */
 285 #if !defined(L_divdi3) && !defined(L_moddi3)
 286 extern DWtype __negdi2 (DWtype);
 287 #endif
 288
 289 extern DWtype __lshrdi3 (DWtype, word_type);
 290 extern DWtype __ashldi3 (DWtype, word_type);
 291 extern DWtype __ashrdi3 (DWtype, word_type);
 292
 293 /* __udiv_w_sdiv is static inline when building other libgcc2 portions.  */
 294 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \
 295      !defined(L_umoddi3) && !defined(L_moddi3))
 296 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 297 #endif
 298
 299 extern word_type __cmpdi2 (DWtype, DWtype);
 300 extern word_type __ucmpdi2 (DWtype, DWtype);
 301
 302 extern Wtype __absvSI2 (Wtype);
 303 extern Wtype __addvSI3 (Wtype, Wtype);
 304 extern Wtype __subvSI3 (Wtype, Wtype);
 305 extern Wtype __mulvSI3 (Wtype, Wtype);
 306 extern Wtype __negvSI2 (Wtype);
 307 extern DWtype __absvDI2 (DWtype);
 308 extern DWtype __addvDI3 (DWtype, DWtype);
 309 extern DWtype __subvDI3 (DWtype, DWtype);
 310 extern DWtype __mulvDI3 (DWtype, DWtype);
 311 extern DWtype __negvDI2 (DWtype);
 312
 313 #ifdef COMPAT_SIMODE_TRAPPING_ARITHMETIC
 314 extern SItype __absvsi2 (SItype);
 315 extern SItype __addvsi3 (SItype, SItype);
 316 extern SItype __subvsi3 (SItype, SItype);
 317 extern SItype __mulvsi3 (SItype, SItype);
 318 extern SItype __negvsi2 (SItype);
 319 #endif /* COMPAT_SIMODE_TRAPPING_ARITHMETIC */
 320
 321 #undef int
 322 #if LIBGCC2_HAS_SF_MODE
 323 extern DWtype __fixsfdi (SFtype);
 324 extern SFtype __floatdisf (DWtype);
 325 extern SFtype __floatundisf (UDWtype);
 326 extern UWtype __fixunssfSI (SFtype);
 327 extern DWtype __fixunssfDI (SFtype);
 328 extern SFtype __powisf2 (SFtype, int);
 329 extern SCtype __divsc3 (SFtype, SFtype, SFtype, SFtype);
 330 extern SCtype __mulsc3 (SFtype, SFtype, SFtype, SFtype);
 331 #endif
 332 #if LIBGCC2_HAS_DF_MODE
 333 extern DWtype __fixdfdi (DFtype);
 334 extern DFtype __floatdidf (DWtype);
 335 extern DFtype __floatundidf (UDWtype);
 336 extern UWtype __fixunsdfSI (DFtype);
 337 extern DWtype __fixunsdfDI (DFtype);
 338 extern DFtype __powidf2 (DFtype, int);
 339 extern DCtype __divdc3 (DFtype, DFtype, DFtype, DFtype);
 340 extern DCtype __muldc3 (DFtype, DFtype, DFtype, DFtype);
 341 #endif
 342
 343 #if LIBGCC2_HAS_XF_MODE
 344 extern DWtype __fixxfdi (XFtype);
 345 extern DWtype __fixunsxfDI (XFtype);
 346 extern XFtype __floatdixf (DWtype);
 347 extern XFtype __floatundixf (UDWtype);
 348 extern UWtype __fixunsxfSI (XFtype);
 349 extern XFtype __powixf2 (XFtype, int);
 350 extern XCtype __divxc3 (XFtype, XFtype, XFtype, XFtype);
 351 extern XCtype __mulxc3 (XFtype, XFtype, XFtype, XFtype);
 352 #endif
 353
 354 #if LIBGCC2_HAS_TF_MODE
 355 extern DWtype __fixunstfDI (TFtype);
 356 extern DWtype __fixtfdi (TFtype);
 357 extern TFtype __floatditf (DWtype);
 358 extern TFtype __floatunditf (UDWtype);
 359 extern TFtype __powitf2 (TFtype, int);
 360 extern TCtype __divtc3 (TFtype, TFtype, TFtype, TFtype);
 361 extern TCtype __multc3 (TFtype, TFtype, TFtype, TFtype);
 362 #endif
 363 #define int bogus_type
 364
 365 /* DWstructs are pairs of Wtype values in the order determined by
 366    LIBGCC2_WORDS_BIG_ENDIAN.  */
 367
 368 #if LIBGCC2_WORDS_BIG_ENDIAN
 369   struct DWstruct {Wtype high, low;};
 370 #else
 371   struct DWstruct {Wtype low, high;};
 372 #endif
 373
 374 /* We need this union to unpack/pack DImode values, since we don't have
 375    any arithmetic yet.  Incoming DImode parameters are stored into the
 376    `ll' field, and the unpacked result is read from the struct `s'.  */
 377
 378 typedef union
 379 {
 380   struct DWstruct s;
 381   DWtype ll;
 382 } DWunion;
 383
 384 /* Defined for L_popcount_tab.  Exported here because some targets may
 385    want to use it for their own versions of the __popcount builtins.  */
 386 extern const UQItype __popcount_tab[256];
 387
 388 /* Defined for L_clz.  Exported here because some targets may want to use
 389    it for their own versions of the __clz builtins.  It contains the bit
 390    position of the first set bit for the numbers 0 - 255.  This avoids the
 391    need for a seperate table for the __ctz builtins.  */
 392 extern const UQItype __clz_tab[256];
 393
 394 #include "longlong.h"
 395
 396 #undef int
 397 extern int __clzDI2 (UDWtype);
 398 extern int __clzSI2 (UWtype);
 399 extern int __ctzSI2 (UWtype);
 400 extern int __ffsSI2 (UWtype);
 401 extern int __ffsDI2 (DWtype);
 402 extern int __ctzDI2 (UDWtype);
 403 extern int __popcountSI2 (UWtype);
 404 extern int __popcountDI2 (UDWtype);
 405 extern int __paritySI2 (UWtype);
 406 extern int __parityDI2 (UDWtype);
 407 #define int bogus_type
 408
 409 extern void __enable_execute_stack (void *);
 410
 411 #ifndef HIDE_EXPORTS
 412 #pragma GCC visibility pop
 413 #endif
 414
 415 #endif /* ! GCC_LIBGCC2_H */