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 /* Permit the tm.h file to select the endianness to use just for this
  43    file.  This is used when the endianness is determined when the
  44    compiler is run.  */
  45
  46 #ifndef LIBGCC2_WORDS_BIG_ENDIAN
  47 #define LIBGCC2_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
  48 #endif
  49
  50 #ifndef LIBGCC2_DOUBLE_TYPE_SIZE
  51 #define LIBGCC2_DOUBLE_TYPE_SIZE DOUBLE_TYPE_SIZE
  52 #endif
  53 #ifndef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
  54 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE LONG_DOUBLE_TYPE_SIZE
  55 #endif
  56
  57 #ifndef LIBGCC2_HAS_SF_MODE
  58 #define LIBGCC2_HAS_SF_MODE (BITS_PER_UNIT == 8)
  59 #endif
  60
  61 #ifndef LIBGCC2_HAS_DF_MODE
  62 #define LIBGCC2_HAS_DF_MODE \
  63   (BITS_PER_UNIT == 8 \
  64    && (LIBGCC2_DOUBLE_TYPE_SIZE == 64 \
  65        || LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 64))
  66 #endif
  67
  68 #ifndef LIBGCC2_HAS_XF_MODE
  69 #define LIBGCC2_HAS_XF_MODE \
  70   (BITS_PER_UNIT == 8 && LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 80)
  71 #endif
  72
  73 #ifndef LIBGCC2_HAS_TF_MODE
  74 #define LIBGCC2_HAS_TF_MODE \
  75   (BITS_PER_UNIT == 8 && LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128)
  76 #endif
  77
  78 #ifndef SF_SIZE
  79 #if LIBGCC2_HAS_SF_MODE
  80 #define SF_SIZE FLT_MANT_DIG
  81 #else
  82 #define SF_SIZE 0
  83 #endif
  84 #endif
  85
  86 #ifndef DF_SIZE
  87 #if LIBGCC2_HAS_DF_MODE
  88 #if LIBGCC2_DOUBLE_TYPE_SIZE == 64
  89 #define DF_SIZE DBL_MANT_DIG
  90 #elif LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 64
  91 #define DF_SIZE LDBL_MANT_DIG
  92 #else
  93 #define DF_SIZE 0
  94 #endif
  95 #else
  96 #define DF_SIZE 0
  97 #endif
  98 #endif
  99
 100 #ifndef XF_SIZE
 101 #if LIBGCC2_HAS_XF_MODE
 102 #define XF_SIZE LDBL_MANT_DIG
 103 #else
 104 #define XF_SIZE 0
 105 #endif
 106 #endif
 107
 108 #ifndef TF_SIZE
 109 #if LIBGCC2_HAS_TF_MODE
 110 #define TF_SIZE LDBL_MANT_DIG
 111 #else
 112 #define TF_SIZE 0
 113 #endif
 114 #endif
 115
 116 /* FIXME: This #ifdef probably should be removed, ie. enable the test
 117    for mips too.  */
 118 /* Don't use IBM Extended Double TFmode for TI->SF calculations.
 119    The conversion from long double to float suffers from double
 120    rounding, because we convert via double.  In other cases, going
 121    through the software fp routines is much slower than the fallback.  */
 122 #ifdef __powerpc__
 123 #define AVOID_FP_TYPE_CONVERSION(SIZE) (SIZE == 106)
 124 #elif defined(WIDEST_HARDWARE_FP_SIZE)
 125 #define AVOID_FP_TYPE_CONVERSION(SIZE) (SIZE > WIDEST_HARDWARE_FP_SIZE)
 126 #else
 127 #define AVOID_FP_TYPE_CONVERSION(SIZE) 0
 128 #endif
 129
 130 /* In the first part of this file, we are interfacing to calls generated
 131    by the compiler itself.  These calls pass values into these routines
 132    which have very specific modes (rather than very specific types), and
 133    these compiler-generated calls also expect any return values to have
 134    very specific modes (rather than very specific types).  Thus, we need
 135    to avoid using regular C language type names in this part of the file
 136    because the sizes for those types can be configured to be anything.
 137    Instead we use the following special type names.  */
 138
 139 typedef          int QItype     __attribute__ ((mode (QI)));
 140 typedef unsigned int UQItype    __attribute__ ((mode (QI)));
 141 typedef          int HItype     __attribute__ ((mode (HI)));
 142 typedef unsigned int UHItype    __attribute__ ((mode (HI)));
 143 #if MIN_UNITS_PER_WORD > 1
 144 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1.  */
 145 typedef          int SItype     __attribute__ ((mode (SI)));
 146 typedef unsigned int USItype    __attribute__ ((mode (SI)));
 147 #if LONG_LONG_TYPE_SIZE > 32
 148 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2.  */
 149 typedef          int DItype     __attribute__ ((mode (DI)));
 150 typedef unsigned int UDItype    __attribute__ ((mode (DI)));
 151 #if MIN_UNITS_PER_WORD > 4
 152 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4.  */
 153 typedef          int TItype     __attribute__ ((mode (TI)));
 154 typedef unsigned int UTItype    __attribute__ ((mode (TI)));
 155 #endif
 156 #endif
 157 #endif
 158
 159 #if LIBGCC2_HAS_SF_MODE
 160 typedef         float SFtype    __attribute__ ((mode (SF)));
 161 typedef _Complex float SCtype   __attribute__ ((mode (SC)));
 162 #endif
 163 #if LIBGCC2_HAS_DF_MODE
 164 typedef         float DFtype    __attribute__ ((mode (DF)));
 165 typedef _Complex float DCtype   __attribute__ ((mode (DC)));
 166 #endif
 167 #if LIBGCC2_HAS_XF_MODE
 168 typedef         float XFtype    __attribute__ ((mode (XF)));
 169 typedef _Complex float XCtype   __attribute__ ((mode (XC)));
 170 #endif
 171 #if LIBGCC2_HAS_TF_MODE
 172 typedef         float TFtype    __attribute__ ((mode (TF)));
 173 typedef _Complex float TCtype   __attribute__ ((mode (TC)));
 174 #endif
 175
 176 typedef int cmp_return_type __attribute__((mode (__libgcc_cmp_return__)));
 177 typedef int shift_count_type __attribute__((mode (__libgcc_shift_count__)));
 178
 179 /* Make sure that we don't accidentally use any normal C language built-in
 180    type names in the first part of this file.  Instead we want to use *only*
 181    the type names defined above.  The following macro definitions insure
 182    that if we *do* accidentally use some normal C language built-in type name,
 183    we will get a syntax error.  */
 184
 185 #define char bogus_type
 186 #define short bogus_type
 187 #define int bogus_type
 188 #define long bogus_type
 189 #define unsigned bogus_type
 190 #define float bogus_type
 191 #define double bogus_type
 192
 193 /* Versions prior to 3.4.4 were not taking into account the word size for
 194    the 5 trapping arithmetic functions absv, addv, subv, mulv and negv.  As
 195    a consequence, the si and di variants were always and the only ones emitted.
 196    To maintain backward compatibility, COMPAT_SIMODE_TRAPPING_ARITHMETIC is
 197    defined on platforms where it makes sense to still have the si variants
 198    emitted.  As a bonus, their implementation is now correct.  Note that the
 199    same mechanism should have been implemented for the di variants, but it
 200    turns out that no platform would define COMPAT_DIMODE_TRAPPING_ARITHMETIC
 201    if it existed.  */
 202
 203 #if LIBGCC2_UNITS_PER_WORD == 8
 204 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
 205 #define Wtype   DItype
 206 #define UWtype  UDItype
 207 #define HWtype  DItype
 208 #define UHWtype UDItype
 209 #define DWtype  TItype
 210 #define UDWtype UTItype
 211 #define __NW(a,b)       __ ## a ## di ## b
 212 #define __NDW(a,b)      __ ## a ## ti ## b
 213 #define COMPAT_SIMODE_TRAPPING_ARITHMETIC
 214 #elif LIBGCC2_UNITS_PER_WORD == 4
 215 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 216 #define Wtype   SItype
 217 #define UWtype  USItype
 218 #define HWtype  SItype
 219 #define UHWtype USItype
 220 #define DWtype  DItype
 221 #define UDWtype UDItype
 222 #define __NW(a,b)       __ ## a ## si ## b
 223 #define __NDW(a,b)      __ ## a ## di ## b
 224 #elif LIBGCC2_UNITS_PER_WORD == 2
 225 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 226 #define Wtype   HItype
 227 #define UWtype  UHItype
 228 #define HWtype  HItype
 229 #define UHWtype UHItype
 230 #define DWtype  SItype
 231 #define UDWtype USItype
 232 #define __NW(a,b)       __ ## a ## hi ## b
 233 #define __NDW(a,b)      __ ## a ## si ## b
 234 #else
 235 #define W_TYPE_SIZE BITS_PER_UNIT
 236 #define Wtype   QItype
 237 #define UWtype  UQItype
 238 #define HWtype  QItype
 239 #define UHWtype UQItype
 240 #define DWtype  HItype
 241 #define UDWtype UHItype
 242 #define __NW(a,b)       __ ## a ## qi ## b
 243 #define __NDW(a,b)      __ ## a ## hi ## b
 244 #endif
 245
 246 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
 247 #define Wtype_MIN (- Wtype_MAX - 1)
 248
 249 #if W_TYPE_SIZE == 8
 250 # define Wtype_MAXp1_F  0x1p8f
 251 #elif W_TYPE_SIZE == 16
 252 # define Wtype_MAXp1_F  0x1p16f
 253 #elif W_TYPE_SIZE == 32
 254 # define Wtype_MAXp1_F  0x1p32f
 255 #elif W_TYPE_SIZE == 64
 256 # define Wtype_MAXp1_F  0x1p64f
 257 #else
 258 # error "expand the table"
 259 #endif
 260
 261 #define __muldi3        __NDW(mul,3)
 262 #define __divdi3        __NDW(div,3)
 263 #define __udivdi3       __NDW(udiv,3)
 264 #define __moddi3        __NDW(mod,3)
 265 #define __umoddi3       __NDW(umod,3)
 266 #define __negdi2        __NDW(neg,2)
 267 #define __lshrdi3       __NDW(lshr,3)
 268 #define __ashldi3       __NDW(ashl,3)
 269 #define __ashrdi3       __NDW(ashr,3)
 270 #define __cmpdi2        __NDW(cmp,2)
 271 #define __ucmpdi2       __NDW(ucmp,2)
 272 #define __udivmoddi4    __NDW(udivmod,4)
 273 #define __fixunstfDI    __NDW(fixunstf,)
 274 #define __fixtfdi       __NDW(fixtf,)
 275 #define __fixunsxfDI    __NDW(fixunsxf,)
 276 #define __fixxfdi       __NDW(fixxf,)
 277 #define __fixunsdfDI    __NDW(fixunsdf,)
 278 #define __fixdfdi       __NDW(fixdf,)
 279 #define __fixunssfDI    __NDW(fixunssf,)
 280 #define __fixsfdi       __NDW(fixsf,)
 281 #define __floatdixf     __NDW(float,xf)
 282 #define __floatditf     __NDW(float,tf)
 283 #define __floatdidf     __NDW(float,df)
 284 #define __floatdisf     __NDW(float,sf)
 285 #define __floatundixf   __NDW(floatun,xf)
 286 #define __floatunditf   __NDW(floatun,tf)
 287 #define __floatundidf   __NDW(floatun,df)
 288 #define __floatundisf   __NDW(floatun,sf)
 289 #define __fixunsxfSI    __NW(fixunsxf,)
 290 #define __fixunstfSI    __NW(fixunstf,)
 291 #define __fixunsdfSI    __NW(fixunsdf,)
 292 #define __fixunssfSI    __NW(fixunssf,)
 293
 294 #define __absvSI2       __NW(absv,2)
 295 #define __addvSI3       __NW(addv,3)
 296 #define __subvSI3       __NW(subv,3)
 297 #define __mulvSI3       __NW(mulv,3)
 298 #define __negvSI2       __NW(negv,2)
 299 #define __absvDI2       __NDW(absv,2)
 300 #define __addvDI3       __NDW(addv,3)
 301 #define __subvDI3       __NDW(subv,3)
 302 #define __mulvDI3       __NDW(mulv,3)
 303 #define __negvDI2       __NDW(negv,2)
 304
 305 #define __ffsSI2        __NW(ffs,2)
 306 #define __clzSI2        __NW(clz,2)
 307 #define __ctzSI2        __NW(ctz,2)
 308 #define __popcountSI2   __NW(popcount,2)
 309 #define __paritySI2     __NW(parity,2)
 310 #define __ffsDI2        __NDW(ffs,2)
 311 #define __clzDI2        __NDW(clz,2)
 312 #define __ctzDI2        __NDW(ctz,2)
 313 #define __popcountDI2   __NDW(popcount,2)
 314 #define __parityDI2     __NDW(parity,2)
 315
 316 extern DWtype __muldi3 (DWtype, DWtype);
 317 extern DWtype __divdi3 (DWtype, DWtype);
 318 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 319 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 320 extern DWtype __moddi3 (DWtype, DWtype);
 321
 322 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 323 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 324      !defined (L_umoddi3) && !defined (L_moddi3))
 325 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 326 #endif
 327
 328 /* __negdi2 is static inline when building other libgcc2 portions.  */
 329 #if !defined(L_divdi3) && !defined(L_moddi3)
 330 extern DWtype __negdi2 (DWtype);
 331 #endif
 332
 333 extern DWtype __lshrdi3 (DWtype, shift_count_type);
 334 extern DWtype __ashldi3 (DWtype, shift_count_type);
 335 extern DWtype __ashrdi3 (DWtype, shift_count_type);
 336
 337 /* __udiv_w_sdiv is static inline when building other libgcc2 portions.  */
 338 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \
 339      !defined(L_umoddi3) && !defined(L_moddi3))
 340 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 341 #endif
 342
 343 extern cmp_return_type __cmpdi2 (DWtype, DWtype);
 344 extern cmp_return_type __ucmpdi2 (DWtype, DWtype);
 345
 346 #if MIN_UNITS_PER_WORD > 1
 347 extern SItype __bswapsi2 (SItype);
 348 #endif
 349 #if LONG_LONG_TYPE_SIZE > 32
 350 extern DItype __bswapdi2 (DItype);
 351 #endif
 352
 353 extern Wtype __absvSI2 (Wtype);
 354 extern Wtype __addvSI3 (Wtype, Wtype);
 355 extern Wtype __subvSI3 (Wtype, Wtype);
 356 extern Wtype __mulvSI3 (Wtype, Wtype);
 357 extern Wtype __negvSI2 (Wtype);
 358 extern DWtype __absvDI2 (DWtype);
 359 extern DWtype __addvDI3 (DWtype, DWtype);
 360 extern DWtype __subvDI3 (DWtype, DWtype);
 361 extern DWtype __mulvDI3 (DWtype, DWtype);
 362 extern DWtype __negvDI2 (DWtype);
 363
 364 #ifdef COMPAT_SIMODE_TRAPPING_ARITHMETIC
 365 extern SItype __absvsi2 (SItype);
 366 extern SItype __addvsi3 (SItype, SItype);
 367 extern SItype __subvsi3 (SItype, SItype);
 368 extern SItype __mulvsi3 (SItype, SItype);
 369 extern SItype __negvsi2 (SItype);
 370 #endif /* COMPAT_SIMODE_TRAPPING_ARITHMETIC */
 371
 372 #undef int
 373 #if LIBGCC2_HAS_SF_MODE
 374 extern DWtype __fixsfdi (SFtype);
 375 extern SFtype __floatdisf (DWtype);
 376 extern SFtype __floatundisf (UDWtype);
 377 extern UWtype __fixunssfSI (SFtype);
 378 extern UDWtype __fixunssfDI (SFtype);
 379 extern SFtype __powisf2 (SFtype, int);
 380 extern SCtype __divsc3 (SFtype, SFtype, SFtype, SFtype);
 381 extern SCtype __mulsc3 (SFtype, SFtype, SFtype, SFtype);
 382 #endif
 383 #if LIBGCC2_HAS_DF_MODE
 384 extern DWtype __fixdfdi (DFtype);
 385 extern DFtype __floatdidf (DWtype);
 386 extern DFtype __floatundidf (UDWtype);
 387 extern UWtype __fixunsdfSI (DFtype);
 388 extern UDWtype __fixunsdfDI (DFtype);
 389 extern DFtype __powidf2 (DFtype, int);
 390 extern DCtype __divdc3 (DFtype, DFtype, DFtype, DFtype);
 391 extern DCtype __muldc3 (DFtype, DFtype, DFtype, DFtype);
 392 #endif
 393
 394 #if LIBGCC2_HAS_XF_MODE
 395 extern DWtype __fixxfdi (XFtype);
 396 extern UDWtype __fixunsxfDI (XFtype);
 397 extern XFtype __floatdixf (DWtype);
 398 extern XFtype __floatundixf (UDWtype);
 399 extern UWtype __fixunsxfSI (XFtype);
 400 extern XFtype __powixf2 (XFtype, int);
 401 extern XCtype __divxc3 (XFtype, XFtype, XFtype, XFtype);
 402 extern XCtype __mulxc3 (XFtype, XFtype, XFtype, XFtype);
 403 #endif
 404
 405 #if LIBGCC2_HAS_TF_MODE
 406 extern UDWtype __fixunstfDI (TFtype);
 407 extern DWtype __fixtfdi (TFtype);
 408 extern TFtype __floatditf (DWtype);
 409 extern TFtype __floatunditf (UDWtype);
 410 extern TFtype __powitf2 (TFtype, int);
 411 extern TCtype __divtc3 (TFtype, TFtype, TFtype, TFtype);
 412 extern TCtype __multc3 (TFtype, TFtype, TFtype, TFtype);
 413 #endif
 414 #define int bogus_type
 415
 416 /* DWstructs are pairs of Wtype values in the order determined by
 417    LIBGCC2_WORDS_BIG_ENDIAN.  */
 418
 419 #if LIBGCC2_WORDS_BIG_ENDIAN
 420   struct DWstruct {Wtype high, low;};
 421 #else
 422   struct DWstruct {Wtype low, high;};
 423 #endif
 424
 425 /* We need this union to unpack/pack DImode values, since we don't have
 426    any arithmetic yet.  Incoming DImode parameters are stored into the
 427    `ll' field, and the unpacked result is read from the struct `s'.  */
 428
 429 typedef union
 430 {
 431   struct DWstruct s;
 432   DWtype ll;
 433 } DWunion;
 434
 435 /* Defined for L_popcount_tab.  Exported here because some targets may
 436    want to use it for their own versions of the __popcount builtins.  */
 437 extern const UQItype __popcount_tab[256];
 438
 439 /* Defined for L_clz.  Exported here because some targets may want to use
 440    it for their own versions of the __clz builtins.  It contains the bit
 441    position of the first set bit for the numbers 0 - 255.  This avoids the
 442    need for a separate table for the __ctz builtins.  */
 443 extern const UQItype __clz_tab[256];
 444
 445 #include "longlong.h"
 446
 447 #undef int
 448 extern int __clzDI2 (UDWtype);
 449 extern int __clzSI2 (UWtype);
 450 extern int __ctzSI2 (UWtype);
 451 extern int __ffsSI2 (UWtype);
 452 extern int __ffsDI2 (DWtype);
 453 extern int __ctzDI2 (UDWtype);
 454 extern int __popcountSI2 (UWtype);
 455 extern int __popcountDI2 (UDWtype);
 456 extern int __paritySI2 (UWtype);
 457 extern int __parityDI2 (UDWtype);
 458 #define int bogus_type
 459
 460 extern void __enable_execute_stack (void *);
 461
 462 #ifndef HIDE_EXPORTS
 463 #pragma GCC visibility pop
 464 #endif
 465
 466 #endif /* ! GCC_LIBGCC2_H */