gnu/dist/gcc4/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 /* In the first part of this file, we are interfacing to calls generated
  83    by the compiler itself.  These calls pass values into these routines
  84    which have very specific modes (rather than very specific types), and
  85    these compiler-generated calls also expect any return values to have
  86    very specific modes (rather than very specific types).  Thus, we need
  87    to avoid using regular C language type names in this part of the file
  88    because the sizes for those types can be configured to be anything.
  89    Instead we use the following special type names.  */
  90
  91 typedef          int QItype     __attribute__ ((mode (QI)));
  92 typedef unsigned int UQItype    __attribute__ ((mode (QI)));
  93 typedef          int HItype     __attribute__ ((mode (HI)));
  94 typedef unsigned int UHItype    __attribute__ ((mode (HI)));
  95 #if MIN_UNITS_PER_WORD > 1
  96 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1.  */
  97 typedef          int SItype     __attribute__ ((mode (SI)));
  98 typedef unsigned int USItype    __attribute__ ((mode (SI)));
  99 #if LONG_LONG_TYPE_SIZE > 32
 100 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2.  */
 101 typedef          int DItype     __attribute__ ((mode (DI)));
 102 typedef unsigned int UDItype    __attribute__ ((mode (DI)));
 103 #if MIN_UNITS_PER_WORD > 4
 104 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4.  */
 105 typedef          int TItype     __attribute__ ((mode (TI)));
 106 typedef unsigned int UTItype    __attribute__ ((mode (TI)));
 107 #endif
 108 #endif
 109 #endif
 110
 111 #if LIBGCC2_HAS_SF_MODE
 112 typedef         float SFtype    __attribute__ ((mode (SF)));
 113 typedef _Complex float SCtype   __attribute__ ((mode (SC)));
 114 #endif
 115 #if LIBGCC2_HAS_DF_MODE
 116 typedef         float DFtype    __attribute__ ((mode (DF)));
 117 typedef _Complex float DCtype   __attribute__ ((mode (DC)));
 118 #endif
 119 #if LIBGCC2_HAS_XF_MODE
 120 typedef         float XFtype    __attribute__ ((mode (XF)));
 121 typedef _Complex float XCtype   __attribute__ ((mode (XC)));
 122 #endif
 123 #if LIBGCC2_HAS_TF_MODE
 124 typedef         float TFtype    __attribute__ ((mode (TF)));
 125 typedef _Complex float TCtype   __attribute__ ((mode (TC)));
 126 #endif
 127
 128 typedef int word_type __attribute__ ((mode (__word__)));
 129
 130 /* Make sure that we don't accidentally use any normal C language built-in
 131    type names in the first part of this file.  Instead we want to use *only*
 132    the type names defined above.  The following macro definitions insure
 133    that if we *do* accidentally use some normal C language built-in type name,
 134    we will get a syntax error.  */
 135
 136 #define char bogus_type
 137 #define short bogus_type
 138 #define int bogus_type
 139 #define long bogus_type
 140 #define unsigned bogus_type
 141 #define float bogus_type
 142 #define double bogus_type
 143
 144 /* Versions prior to 3.4.4 were not taking into account the word size for
 145    the 5 trapping arithmetic functions absv, addv, subv, mulv and negv.  As
 146    a consequence, the si and di variants were always and the only ones emitted.
 147    To maintain backward compatibility, COMPAT_SIMODE_TRAPPING_ARITHMETIC is
 148    defined on platforms where it makes sense to still have the si variants
 149    emitted.  As a bonus, their implementation is now correct.  Note that the
 150    same mechanism should have been implemented for the di variants, but it
 151    turns out that no platform would define COMPAT_DIMODE_TRAPPING_ARITHMETIC
 152    if it existed.  */
 153
 154 #if LIBGCC2_UNITS_PER_WORD == 8
 155 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
 156 #define Wtype   DItype
 157 #define UWtype  UDItype
 158 #define HWtype  DItype
 159 #define UHWtype UDItype
 160 #define DWtype  TItype
 161 #define UDWtype UTItype
 162 #define __NW(a,b)       __ ## a ## di ## b
 163 #define __NDW(a,b)      __ ## a ## ti ## b
 164 #define COMPAT_SIMODE_TRAPPING_ARITHMETIC
 165 #elif LIBGCC2_UNITS_PER_WORD == 4
 166 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 167 #define Wtype   SItype
 168 #define UWtype  USItype
 169 #define HWtype  SItype
 170 #define UHWtype USItype
 171 #define DWtype  DItype
 172 #define UDWtype UDItype
 173 #define __NW(a,b)       __ ## a ## si ## b
 174 #define __NDW(a,b)      __ ## a ## di ## b
 175 #elif LIBGCC2_UNITS_PER_WORD == 2
 176 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 177 #define Wtype   HItype
 178 #define UWtype  UHItype
 179 #define HWtype  HItype
 180 #define UHWtype UHItype
 181 #define DWtype  SItype
 182 #define UDWtype USItype
 183 #define __NW(a,b)       __ ## a ## hi ## b
 184 #define __NDW(a,b)      __ ## a ## si ## b
 185 #else
 186 #define W_TYPE_SIZE BITS_PER_UNIT
 187 #define Wtype   QItype
 188 #define UWtype  UQItype
 189 #define HWtype  QItype
 190 #define UHWtype UQItype
 191 #define DWtype  HItype
 192 #define UDWtype UHItype
 193 #define __NW(a,b)       __ ## a ## qi ## b
 194 #define __NDW(a,b)      __ ## a ## hi ## b
 195 #endif
 196
 197 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
 198 #define Wtype_MIN (- Wtype_MAX - 1)
 199
 200 #if W_TYPE_SIZE == 8
 201 # define Wtype_MAXp1_F  0x1p8f
 202 #elif W_TYPE_SIZE == 16
 203 # define Wtype_MAXp1_F  0x1p16f
 204 #elif W_TYPE_SIZE == 32
 205 # define Wtype_MAXp1_F  0x1p32f
 206 #elif W_TYPE_SIZE == 64
 207 # define Wtype_MAXp1_F  0x1p64f
 208 #else
 209 # error "expand the table"
 210 #endif
 211
 212 #define __muldi3        __NDW(mul,3)
 213 #define __divdi3        __NDW(div,3)
 214 #define __udivdi3       __NDW(udiv,3)
 215 #define __moddi3        __NDW(mod,3)
 216 #define __umoddi3       __NDW(umod,3)
 217 #define __negdi2        __NDW(neg,2)
 218 #define __lshrdi3       __NDW(lshr,3)
 219 #define __ashldi3       __NDW(ashl,3)
 220 #define __ashrdi3       __NDW(ashr,3)
 221 #define __cmpdi2        __NDW(cmp,2)
 222 #define __ucmpdi2       __NDW(ucmp,2)
 223 #define __udivmoddi4    __NDW(udivmod,4)
 224 #define __fixunstfDI    __NDW(fixunstf,)
 225 #define __fixtfdi       __NDW(fixtf,)
 226 #define __fixunsxfDI    __NDW(fixunsxf,)
 227 #define __fixxfdi       __NDW(fixxf,)
 228 #define __fixunsdfDI    __NDW(fixunsdf,)
 229 #define __fixdfdi       __NDW(fixdf,)
 230 #define __fixunssfDI    __NDW(fixunssf,)
 231 #define __fixsfdi       __NDW(fixsf,)
 232 #define __floatdixf     __NDW(float,xf)
 233 #define __floatditf     __NDW(float,tf)
 234 #define __floatdidf     __NDW(float,df)
 235 #define __floatdisf     __NDW(float,sf)
 236 #define __fixunsxfSI    __NW(fixunsxf,)
 237 #define __fixunstfSI    __NW(fixunstf,)
 238 #define __fixunsdfSI    __NW(fixunsdf,)
 239 #define __fixunssfSI    __NW(fixunssf,)
 240
 241 #define __absvSI2       __NW(absv,2)
 242 #define __addvSI3       __NW(addv,3)
 243 #define __subvSI3       __NW(subv,3)
 244 #define __mulvSI3       __NW(mulv,3)
 245 #define __negvSI2       __NW(negv,2)
 246 #define __absvDI2       __NDW(absv,2)
 247 #define __addvDI3       __NDW(addv,3)
 248 #define __subvDI3       __NDW(subv,3)
 249 #define __mulvDI3       __NDW(mulv,3)
 250 #define __negvDI2       __NDW(negv,2)
 251
 252 #define __ffsSI2        __NW(ffs,2)
 253 #define __clzSI2        __NW(clz,2)
 254 #define __ctzSI2        __NW(ctz,2)
 255 #define __popcountSI2   __NW(popcount,2)
 256 #define __paritySI2     __NW(parity,2)
 257 #define __ffsDI2        __NDW(ffs,2)
 258 #define __clzDI2        __NDW(clz,2)
 259 #define __ctzDI2        __NDW(ctz,2)
 260 #define __popcountDI2   __NDW(popcount,2)
 261 #define __parityDI2     __NDW(parity,2)
 262
 263 extern DWtype __muldi3 (DWtype, DWtype);
 264 extern DWtype __divdi3 (DWtype, DWtype);
 265 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 266 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 267 extern DWtype __moddi3 (DWtype, DWtype);
 268
 269 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 270 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 271      !defined (L_umoddi3) && !defined (L_moddi3))
 272 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 273 #endif
 274
 275 /* __negdi2 is static inline when building other libgcc2 portions.  */
 276 #if !defined(L_divdi3) && !defined(L_moddi3)
 277 extern DWtype __negdi2 (DWtype);
 278 #endif
 279
 280 extern DWtype __lshrdi3 (DWtype, word_type);
 281 extern DWtype __ashldi3 (DWtype, word_type);
 282 extern DWtype __ashrdi3 (DWtype, word_type);
 283
 284 /* __udiv_w_sdiv is static inline when building other libgcc2 portions.  */
 285 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \
 286      !defined(L_umoddi3) && !defined(L_moddi3))
 287 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 288 #endif
 289
 290 extern word_type __cmpdi2 (DWtype, DWtype);
 291 extern word_type __ucmpdi2 (DWtype, DWtype);
 292
 293 extern Wtype __absvSI2 (Wtype);
 294 extern Wtype __addvSI3 (Wtype, Wtype);
 295 extern Wtype __subvSI3 (Wtype, Wtype);
 296 extern Wtype __mulvSI3 (Wtype, Wtype);
 297 extern Wtype __negvSI2 (Wtype);
 298 extern DWtype __absvDI2 (DWtype);
 299 extern DWtype __addvDI3 (DWtype, DWtype);
 300 extern DWtype __subvDI3 (DWtype, DWtype);
 301 extern DWtype __mulvDI3 (DWtype, DWtype);
 302 extern DWtype __negvDI2 (DWtype);
 303
 304 #ifdef COMPAT_SIMODE_TRAPPING_ARITHMETIC
 305 extern SItype __absvsi2 (SItype);
 306 extern SItype __addvsi3 (SItype, SItype);
 307 extern SItype __subvsi3 (SItype, SItype);
 308 extern SItype __mulvsi3 (SItype, SItype);
 309 extern SItype __negvsi2 (SItype);
 310 #endif /* COMPAT_SIMODE_TRAPPING_ARITHMETIC */
 311
 312 #undef int
 313 #if LIBGCC2_HAS_SF_MODE
 314 extern DWtype __fixsfdi (SFtype);
 315 extern SFtype __floatdisf (DWtype);
 316 extern UWtype __fixunssfSI (SFtype);
 317 extern DWtype __fixunssfDI (SFtype);
 318 extern SFtype __powisf2 (SFtype, int);
 319 extern SCtype __divsc3 (SFtype, SFtype, SFtype, SFtype);
 320 extern SCtype __mulsc3 (SFtype, SFtype, SFtype, SFtype);
 321 #endif
 322 #if LIBGCC2_HAS_DF_MODE
 323 extern DWtype __fixdfdi (DFtype);
 324 extern DFtype __floatdidf (DWtype);
 325 extern UWtype __fixunsdfSI (DFtype);
 326 extern DWtype __fixunsdfDI (DFtype);
 327 extern DFtype __powidf2 (DFtype, int);
 328 extern DCtype __divdc3 (DFtype, DFtype, DFtype, DFtype);
 329 extern DCtype __muldc3 (DFtype, DFtype, DFtype, DFtype);
 330 #endif
 331
 332 #if LIBGCC2_HAS_XF_MODE
 333 extern DWtype __fixxfdi (XFtype);
 334 extern DWtype __fixunsxfDI (XFtype);
 335 extern XFtype __floatdixf (DWtype);
 336 extern UWtype __fixunsxfSI (XFtype);
 337 extern XFtype __powixf2 (XFtype, int);
 338 extern XCtype __divxc3 (XFtype, XFtype, XFtype, XFtype);
 339 extern XCtype __mulxc3 (XFtype, XFtype, XFtype, XFtype);
 340 #endif
 341
 342 #if LIBGCC2_HAS_TF_MODE
 343 extern DWtype __fixunstfDI (TFtype);
 344 extern DWtype __fixtfdi (TFtype);
 345 extern TFtype __floatditf (DWtype);
 346 extern TFtype __powitf2 (TFtype, int);
 347 extern TCtype __divtc3 (TFtype, TFtype, TFtype, TFtype);
 348 extern TCtype __multc3 (TFtype, TFtype, TFtype, TFtype);
 349 #endif
 350 #define int bogus_type
 351
 352 /* DWstructs are pairs of Wtype values in the order determined by
 353    LIBGCC2_WORDS_BIG_ENDIAN.  */
 354
 355 #if LIBGCC2_WORDS_BIG_ENDIAN
 356   struct DWstruct {Wtype high, low;};
 357 #else
 358   struct DWstruct {Wtype low, high;};
 359 #endif
 360
 361 /* We need this union to unpack/pack DImode values, since we don't have
 362    any arithmetic yet.  Incoming DImode parameters are stored into the
 363    `ll' field, and the unpacked result is read from the struct `s'.  */
 364
 365 typedef union
 366 {
 367   struct DWstruct s;
 368   DWtype ll;
 369 } DWunion;
 370
 371 /* Defined for L_popcount_tab.  Exported here because some targets may
 372    want to use it for their own versions of the __popcount builtins.  */
 373 extern const UQItype __popcount_tab[256];
 374
 375 /* Defined for L_clz.  Exported here because some targets may want to use
 376    it for their own versions of the __clz builtins.  It contains the bit
 377    position of the first set bit for the numbers 0 - 255.  This avoids the
 378    need for a seperate table for the __ctz builtins.  */
 379 extern const UQItype __clz_tab[256];
 380
 381 #include "longlong.h"
 382
 383 #undef int
 384 extern int __clzDI2 (UDWtype);
 385 extern int __clzSI2 (UWtype);
 386 extern int __ctzSI2 (UWtype);
 387 extern int __ffsSI2 (UWtype);
 388 extern int __ffsDI2 (DWtype);
 389 extern int __ctzDI2 (UDWtype);
 390 extern int __popcountSI2 (UWtype);
 391 extern int __popcountDI2 (UDWtype);
 392 extern int __paritySI2 (UWtype);
 393 extern int __parityDI2 (UDWtype);
 394 #define int bogus_type
 395
 396 extern void __enable_execute_stack (void *);
 397
 398 #ifndef HIDE_EXPORTS
 399 #pragma GCC visibility pop
 400 #endif
 401
 402 #endif /* ! GCC_LIBGCC2_H */