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, 59 Temple Place - Suite 330, Boston, MA
  20 02111-1307, 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_DF_MODE
  62 #define LIBGCC2_HAS_DF_MODE \
  63   (LIBGCC2_DOUBLE_TYPE_SIZE == 64 || LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 64)
  64 #endif
  65
  66 #ifndef LIBGCC2_HAS_XF_MODE
  67 #define LIBGCC2_HAS_XF_MODE (LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 80)
  68 #endif
  69
  70 #ifndef LIBGCC2_HAS_TF_MODE
  71 #define LIBGCC2_HAS_TF_MODE (LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128)
  72 #endif
  73
  74 #ifndef MIN_UNITS_PER_WORD
  75 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
  76 #endif
  77
  78 /* In the first part of this file, we are interfacing to calls generated
  79    by the compiler itself.  These calls pass values into these routines
  80    which have very specific modes (rather than very specific types), and
  81    these compiler-generated calls also expect any return values to have
  82    very specific modes (rather than very specific types).  Thus, we need
  83    to avoid using regular C language type names in this part of the file
  84    because the sizes for those types can be configured to be anything.
  85    Instead we use the following special type names.  */
  86
  87 typedef          int QItype     __attribute__ ((mode (QI)));
  88 typedef unsigned int UQItype    __attribute__ ((mode (QI)));
  89 typedef          int HItype     __attribute__ ((mode (HI)));
  90 typedef unsigned int UHItype    __attribute__ ((mode (HI)));
  91 #if MIN_UNITS_PER_WORD > 1
  92 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1.  */
  93 typedef          int SItype     __attribute__ ((mode (SI)));
  94 typedef unsigned int USItype    __attribute__ ((mode (SI)));
  95 #if LONG_LONG_TYPE_SIZE > 32
  96 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2.  */
  97 typedef          int DItype     __attribute__ ((mode (DI)));
  98 typedef unsigned int UDItype    __attribute__ ((mode (DI)));
  99 #if MIN_UNITS_PER_WORD > 4
 100 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4.  */
 101 typedef          int TItype     __attribute__ ((mode (TI)));
 102 typedef unsigned int UTItype    __attribute__ ((mode (TI)));
 103 #endif
 104 #endif
 105 #endif
 106
 107 #if BITS_PER_UNIT == 8
 108
 109 typedef         float SFtype    __attribute__ ((mode (SF)));
 110 typedef _Complex float SCtype   __attribute__ ((mode (SC)));
 111
 112 #if LIBGCC2_HAS_DF_MODE
 113 typedef         float DFtype    __attribute__ ((mode (DF)));
 114 typedef _Complex float DCtype   __attribute__ ((mode (DC)));
 115 #endif
 116 #if LIBGCC2_HAS_XF_MODE
 117 typedef         float XFtype    __attribute__ ((mode (XF)));
 118 typedef _Complex float XCtype   __attribute__ ((mode (XC)));
 119 #endif
 120 #if LIBGCC2_HAS_TF_MODE
 121 typedef         float TFtype    __attribute__ ((mode (TF)));
 122 typedef _Complex float TCtype   __attribute__ ((mode (TC)));
 123 #endif
 124
 125 #else /* BITS_PER_UNIT != 8 */
 126
 127 /* On dsp's there are usually qf/hf/tqf modes used instead of the above.
 128    For now we don't support them in libgcc2.c.  */
 129
 130 #undef L_fixdfdi
 131 #undef L_fixsfdi
 132 #undef L_fixtfdi
 133 #undef L_fixunsdfdi
 134 #undef L_fixunsdfsi
 135 #undef L_fixunssfdi
 136 #undef L_fixunssfsi
 137 #undef L_fixunstfdi
 138 #undef L_fixunsxfdi
 139 #undef L_fixunsxfsi
 140 #undef L_fixxfdi
 141 #undef L_floatdidf
 142 #undef L_floatdisf
 143 #undef L_floatditf
 144 #undef L_floatdixf
 145
 146 #endif /* BITS_PER_UNIT != 8 */
 147
 148 typedef int word_type __attribute__ ((mode (__word__)));
 149
 150 /* Make sure that we don't accidentally use any normal C language built-in
 151    type names in the first part of this file.  Instead we want to use *only*
 152    the type names defined above.  The following macro definitions insure
 153    that if we *do* accidentally use some normal C language built-in type name,
 154    we will get a syntax error.  */
 155
 156 #define char bogus_type
 157 #define short bogus_type
 158 #define int bogus_type
 159 #define long bogus_type
 160 #define unsigned bogus_type
 161 #define float bogus_type
 162 #define double bogus_type
 163
 164 /* Versions prior to 3.4.4 were not taking into account the word size for
 165    the 5 trapping arithmetic functions absv, addv, subv, mulv and negv.  As
 166    a consequence, the si and di variants were always and the only ones emitted.
 167    To maintain backward compatibility, COMPAT_SIMODE_TRAPPING_ARITHMETIC is
 168    defined on platforms where it makes sense to still have the si variants
 169    emitted.  As a bonus, their implementation is now correct.  Note that the
 170    same mechanism should have been implemented for the di variants, but it
 171    turns out that no platform would define COMPAT_DIMODE_TRAPPING_ARITHMETIC
 172    if it existed.  */
 173
 174 #if MIN_UNITS_PER_WORD > 4
 175 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
 176 #define Wtype   DItype
 177 #define UWtype  UDItype
 178 #define HWtype  DItype
 179 #define UHWtype UDItype
 180 #define DWtype  TItype
 181 #define UDWtype UTItype
 182 #define __NW(a,b)       __ ## a ## di ## b
 183 #define __NDW(a,b)      __ ## a ## ti ## b
 184 #define COMPAT_SIMODE_TRAPPING_ARITHMETIC
 185 #elif MIN_UNITS_PER_WORD > 2 \
 186       || (MIN_UNITS_PER_WORD > 1 && LONG_LONG_TYPE_SIZE > 32)
 187 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 188 #define Wtype   SItype
 189 #define UWtype  USItype
 190 #define HWtype  SItype
 191 #define UHWtype USItype
 192 #define DWtype  DItype
 193 #define UDWtype UDItype
 194 #define __NW(a,b)       __ ## a ## si ## b
 195 #define __NDW(a,b)      __ ## a ## di ## b
 196 #elif MIN_UNITS_PER_WORD > 1
 197 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 198 #define Wtype   HItype
 199 #define UWtype  UHItype
 200 #define HWtype  HItype
 201 #define UHWtype UHItype
 202 #define DWtype  SItype
 203 #define UDWtype USItype
 204 #define __NW(a,b)       __ ## a ## hi ## b
 205 #define __NDW(a,b)      __ ## a ## si ## b
 206 #else
 207 #define W_TYPE_SIZE BITS_PER_UNIT
 208 #define Wtype   QItype
 209 #define UWtype  UQItype
 210 #define HWtype  QItype
 211 #define UHWtype UQItype
 212 #define DWtype  HItype
 213 #define UDWtype UHItype
 214 #define __NW(a,b)       __ ## a ## qi ## b
 215 #define __NDW(a,b)      __ ## a ## hi ## b
 216 #endif
 217
 218 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
 219 #define Wtype_MIN (- Wtype_MAX - 1)
 220
 221 #if W_TYPE_SIZE == 8
 222 # define Wtype_MAXp1_F  0x1p8f
 223 #elif W_TYPE_SIZE == 16
 224 # define Wtype_MAXp1_F  0x1p16f
 225 #elif W_TYPE_SIZE == 32
 226 # define Wtype_MAXp1_F  0x1p32f
 227 #elif W_TYPE_SIZE == 64
 228 # define Wtype_MAXp1_F  0x1p64f
 229 #else
 230 # error "expand the table"
 231 #endif
 232
 233 #define __muldi3        __NDW(mul,3)
 234 #define __divdi3        __NDW(div,3)
 235 #define __udivdi3       __NDW(udiv,3)
 236 #define __moddi3        __NDW(mod,3)
 237 #define __umoddi3       __NDW(umod,3)
 238 #define __negdi2        __NDW(neg,2)
 239 #define __lshrdi3       __NDW(lshr,3)
 240 #define __ashldi3       __NDW(ashl,3)
 241 #define __ashrdi3       __NDW(ashr,3)
 242 #define __cmpdi2        __NDW(cmp,2)
 243 #define __ucmpdi2       __NDW(ucmp,2)
 244 #define __udivmoddi4    __NDW(udivmod,4)
 245 #define __fixunstfDI    __NDW(fixunstf,)
 246 #define __fixtfdi       __NDW(fixtf,)
 247 #define __fixunsxfDI    __NDW(fixunsxf,)
 248 #define __fixxfdi       __NDW(fixxf,)
 249 #define __fixunsdfDI    __NDW(fixunsdf,)
 250 #define __fixdfdi       __NDW(fixdf,)
 251 #define __fixunssfDI    __NDW(fixunssf,)
 252 #define __fixsfdi       __NDW(fixsf,)
 253 #define __floatdixf     __NDW(float,xf)
 254 #define __floatditf     __NDW(float,tf)
 255 #define __floatdidf     __NDW(float,df)
 256 #define __floatdisf     __NDW(float,sf)
 257 #define __fixunsxfSI    __NW(fixunsxf,)
 258 #define __fixunstfSI    __NW(fixunstf,)
 259 #define __fixunsdfSI    __NW(fixunsdf,)
 260 #define __fixunssfSI    __NW(fixunssf,)
 261
 262 #define __absvSI2       __NW(absv,2)
 263 #define __addvSI3       __NW(addv,3)
 264 #define __subvSI3       __NW(subv,3)
 265 #define __mulvSI3       __NW(mulv,3)
 266 #define __negvSI2       __NW(negv,2)
 267 #define __absvDI2       __NDW(absv,2)
 268 #define __addvDI3       __NDW(addv,3)
 269 #define __subvDI3       __NDW(subv,3)
 270 #define __mulvDI3       __NDW(mulv,3)
 271 #define __negvDI2       __NDW(negv,2)
 272
 273 #define __ffsSI2        __NW(ffs,2)
 274 #define __clzSI2        __NW(clz,2)
 275 #define __ctzSI2        __NW(ctz,2)
 276 #define __popcountSI2   __NW(popcount,2)
 277 #define __paritySI2     __NW(parity,2)
 278 #define __ffsDI2        __NDW(ffs,2)
 279 #define __clzDI2        __NDW(clz,2)
 280 #define __ctzDI2        __NDW(ctz,2)
 281 #define __popcountDI2   __NDW(popcount,2)
 282 #define __parityDI2     __NDW(parity,2)
 283
 284 extern DWtype __muldi3 (DWtype, DWtype);
 285 extern DWtype __divdi3 (DWtype, DWtype);
 286 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 287 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 288 extern DWtype __moddi3 (DWtype, DWtype);
 289
 290 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 291 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 292      !defined (L_umoddi3) && !defined (L_moddi3))
 293 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 294 #endif
 295
 296 /* __negdi2 is static inline when building other libgcc2 portions.  */
 297 #if !defined(L_divdi3) && !defined(L_moddi3)
 298 extern DWtype __negdi2 (DWtype);
 299 #endif
 300
 301 extern DWtype __lshrdi3 (DWtype, word_type);
 302 extern DWtype __ashldi3 (DWtype, word_type);
 303 extern DWtype __ashrdi3 (DWtype, word_type);
 304
 305 /* __udiv_w_sdiv is static inline when building other libgcc2 portions.  */
 306 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \
 307      !defined(L_umoddi3) && !defined(L_moddi3))
 308 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 309 #endif
 310
 311 extern word_type __cmpdi2 (DWtype, DWtype);
 312 extern word_type __ucmpdi2 (DWtype, DWtype);
 313
 314 extern Wtype __absvSI2 (Wtype);
 315 extern Wtype __addvSI3 (Wtype, Wtype);
 316 extern Wtype __subvSI3 (Wtype, Wtype);
 317 extern Wtype __mulvSI3 (Wtype, Wtype);
 318 extern Wtype __negvSI2 (Wtype);
 319 extern DWtype __absvDI2 (DWtype);
 320 extern DWtype __addvDI3 (DWtype, DWtype);
 321 extern DWtype __subvDI3 (DWtype, DWtype);
 322 extern DWtype __mulvDI3 (DWtype, DWtype);
 323 extern DWtype __negvDI2 (DWtype);
 324
 325 #ifdef COMPAT_SIMODE_TRAPPING_ARITHMETIC
 326 extern SItype __absvsi2 (SItype);
 327 extern SItype __addvsi3 (SItype, SItype);
 328 extern SItype __subvsi3 (SItype, SItype);
 329 extern SItype __mulvsi3 (SItype, SItype);
 330 extern SItype __negvsi2 (SItype);
 331 #endif /* COMPAT_SIMODE_TRAPPING_ARITHMETIC */
 332
 333 #if BITS_PER_UNIT == 8
 334 extern DWtype __fixsfdi (SFtype);
 335 extern SFtype __floatdisf (DWtype);
 336 extern UWtype __fixunssfSI (SFtype);
 337 extern DWtype __fixunssfDI (SFtype);
 338 extern SFtype __powisf2 (SFtype, Wtype);
 339 extern SCtype __divsc3 (SFtype, SFtype, SFtype, SFtype);
 340 extern SCtype __mulsc3 (SFtype, SFtype, SFtype, SFtype);
 341
 342 #if LIBGCC2_HAS_DF_MODE
 343 extern DWtype __fixdfdi (DFtype);
 344 extern DFtype __floatdidf (DWtype);
 345 extern UWtype __fixunsdfSI (DFtype);
 346 extern DWtype __fixunsdfDI (DFtype);
 347 extern DFtype __powidf2 (DFtype, Wtype);
 348 extern DCtype __divdc3 (DFtype, DFtype, DFtype, DFtype);
 349 extern DCtype __muldc3 (DFtype, DFtype, DFtype, DFtype);
 350 #endif
 351
 352 #if LIBGCC2_HAS_XF_MODE
 353 extern DWtype __fixxfdi (XFtype);
 354 extern DWtype __fixunsxfDI (XFtype);
 355 extern XFtype __floatdixf (DWtype);
 356 extern UWtype __fixunsxfSI (XFtype);
 357 extern XFtype __powixf2 (XFtype, Wtype);
 358 extern XCtype __divxc3 (XFtype, XFtype, XFtype, XFtype);
 359 extern XCtype __mulxc3 (XFtype, XFtype, XFtype, XFtype);
 360 #endif
 361
 362 #if LIBGCC2_HAS_TF_MODE
 363 extern DWtype __fixunstfDI (TFtype);
 364 extern DWtype __fixtfdi (TFtype);
 365 extern TFtype __floatditf (DWtype);
 366 extern TFtype __powitf2 (TFtype, Wtype);
 367 extern TCtype __divtc3 (TFtype, TFtype, TFtype, TFtype);
 368 extern TCtype __multc3 (TFtype, TFtype, TFtype, TFtype);
 369 #endif
 370 #endif /* BITS_PER_UNIT == 8 */
 371
 372 /* DWstructs are pairs of Wtype values in the order determined by
 373    LIBGCC2_WORDS_BIG_ENDIAN.  */
 374
 375 #if LIBGCC2_WORDS_BIG_ENDIAN
 376   struct DWstruct {Wtype high, low;};
 377 #else
 378   struct DWstruct {Wtype low, high;};
 379 #endif
 380
 381 /* We need this union to unpack/pack DImode values, since we don't have
 382    any arithmetic yet.  Incoming DImode parameters are stored into the
 383    `ll' field, and the unpacked result is read from the struct `s'.  */
 384
 385 typedef union
 386 {
 387   struct DWstruct s;
 388   DWtype ll;
 389 } DWunion;
 390
 391 #include "longlong.h"
 392
 393 #undef int
 394 extern int __clzDI2 (UDWtype);
 395 extern int __clzSI2 (UWtype);
 396 extern int __ctzSI2 (UWtype);
 397 extern int __ffsSI2 (UWtype);
 398 extern int __ffsDI2 (DWtype);
 399 extern int __ctzDI2 (UDWtype);
 400 extern int __popcountSI2 (UWtype);
 401 extern int __popcountDI2 (UDWtype);
 402 extern int __paritySI2 (UWtype);
 403 extern int __parityDI2 (UDWtype);
 404 #define int bogus_type
 405
 406 extern void __enable_execute_stack (void *);
 407
 408 #ifndef HIDE_EXPORTS
 409 #pragma GCC visibility pop
 410 #endif
 411
 412 #endif /* ! GCC_LIBGCC2_H */