libgcc2.h revision 259563
1/* Header file for libgcc2.c. */ 2/* Copyright (C) 2000, 2001, 2004, 2005 3 Free Software Foundation, Inc. 4 5This file is part of GCC. 6 7GCC is free software; you can redistribute it and/or modify it under 8the terms of the GNU General Public License as published by the Free 9Software Foundation; either version 2, or (at your option) any later 10version. 11 12GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13WARRANTY; without even the implied warranty of MERCHANTABILITY or 14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15for more details. 16 17You should have received a copy of the GNU General Public License 18along with GCC; see the file COPYING. If not, write to the Free 19Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 2002110-1301, 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 37extern int __gcc_bcmp (const unsigned char *, const unsigned char *, size_t); 38extern void __clear_cache (char *, char *); 39extern void __eprintf (const char *, const char *, unsigned int, const char *) 40 __attribute__ ((__noreturn__)); 41 42struct exception_descriptor; 43extern short int __get_eh_table_language (struct exception_descriptor *); 44extern 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/* FIXME: This #ifdef probably should be removed, ie. enable the test 121 for mips too. */ 122#ifdef __powerpc__ 123#define IS_IBM_EXTENDED(SIZE) (SIZE == 106) 124#else 125#define IS_IBM_EXTENDED(SIZE) 0 126#endif 127 128/* In the first part of this file, we are interfacing to calls generated 129 by the compiler itself. These calls pass values into these routines 130 which have very specific modes (rather than very specific types), and 131 these compiler-generated calls also expect any return values to have 132 very specific modes (rather than very specific types). Thus, we need 133 to avoid using regular C language type names in this part of the file 134 because the sizes for those types can be configured to be anything. 135 Instead we use the following special type names. */ 136 137typedef int QItype __attribute__ ((mode (QI))); 138typedef unsigned int UQItype __attribute__ ((mode (QI))); 139typedef int HItype __attribute__ ((mode (HI))); 140typedef unsigned int UHItype __attribute__ ((mode (HI))); 141#if MIN_UNITS_PER_WORD > 1 142/* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1. */ 143typedef int SItype __attribute__ ((mode (SI))); 144typedef unsigned int USItype __attribute__ ((mode (SI))); 145#if LONG_LONG_TYPE_SIZE > 32 146/* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2. */ 147typedef int DItype __attribute__ ((mode (DI))); 148typedef unsigned int UDItype __attribute__ ((mode (DI))); 149#if MIN_UNITS_PER_WORD > 4 150/* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4. */ 151typedef int TItype __attribute__ ((mode (TI))); 152typedef unsigned int UTItype __attribute__ ((mode (TI))); 153#endif 154#endif 155#endif 156 157#if LIBGCC2_HAS_SF_MODE 158typedef float SFtype __attribute__ ((mode (SF))); 159typedef _Complex float SCtype __attribute__ ((mode (SC))); 160#endif 161#if LIBGCC2_HAS_DF_MODE 162typedef float DFtype __attribute__ ((mode (DF))); 163typedef _Complex float DCtype __attribute__ ((mode (DC))); 164#endif 165#if LIBGCC2_HAS_XF_MODE 166typedef float XFtype __attribute__ ((mode (XF))); 167typedef _Complex float XCtype __attribute__ ((mode (XC))); 168#endif 169#if LIBGCC2_HAS_TF_MODE 170typedef float TFtype __attribute__ ((mode (TF))); 171typedef _Complex float TCtype __attribute__ ((mode (TC))); 172#endif 173 174typedef int word_type __attribute__ ((mode (__word__))); 175 176/* Make sure that we don't accidentally use any normal C language built-in 177 type names in the first part of this file. Instead we want to use *only* 178 the type names defined above. The following macro definitions insure 179 that if we *do* accidentally use some normal C language built-in type name, 180 we will get a syntax error. */ 181 182#define char bogus_type 183#define short bogus_type 184#define int bogus_type 185#define long bogus_type 186#define unsigned bogus_type 187#define float bogus_type 188#define double bogus_type 189 190/* Versions prior to 3.4.4 were not taking into account the word size for 191 the 5 trapping arithmetic functions absv, addv, subv, mulv and negv. As 192 a consequence, the si and di variants were always and the only ones emitted. 193 To maintain backward compatibility, COMPAT_SIMODE_TRAPPING_ARITHMETIC is 194 defined on platforms where it makes sense to still have the si variants 195 emitted. As a bonus, their implementation is now correct. Note that the 196 same mechanism should have been implemented for the di variants, but it 197 turns out that no platform would define COMPAT_DIMODE_TRAPPING_ARITHMETIC 198 if it existed. */ 199 200#if LIBGCC2_UNITS_PER_WORD == 8 201#define W_TYPE_SIZE (8 * BITS_PER_UNIT) 202#define Wtype DItype 203#define UWtype UDItype 204#define HWtype DItype 205#define UHWtype UDItype 206#define DWtype TItype 207#define UDWtype UTItype 208#define __NW(a,b) __ ## a ## di ## b 209#define __NDW(a,b) __ ## a ## ti ## b 210#define COMPAT_SIMODE_TRAPPING_ARITHMETIC 211#elif LIBGCC2_UNITS_PER_WORD == 4 212#define W_TYPE_SIZE (4 * BITS_PER_UNIT) 213#define Wtype SItype 214#define UWtype USItype 215#define HWtype SItype 216#define UHWtype USItype 217#define DWtype DItype 218#define UDWtype UDItype 219#define __NW(a,b) __ ## a ## si ## b 220#define __NDW(a,b) __ ## a ## di ## b 221#elif LIBGCC2_UNITS_PER_WORD == 2 222#define W_TYPE_SIZE (2 * BITS_PER_UNIT) 223#define Wtype HItype 224#define UWtype UHItype 225#define HWtype HItype 226#define UHWtype UHItype 227#define DWtype SItype 228#define UDWtype USItype 229#define __NW(a,b) __ ## a ## hi ## b 230#define __NDW(a,b) __ ## a ## si ## b 231#else 232#define W_TYPE_SIZE BITS_PER_UNIT 233#define Wtype QItype 234#define UWtype UQItype 235#define HWtype QItype 236#define UHWtype UQItype 237#define DWtype HItype 238#define UDWtype UHItype 239#define __NW(a,b) __ ## a ## qi ## b 240#define __NDW(a,b) __ ## a ## hi ## b 241#endif 242 243#define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1)) 244#define Wtype_MIN (- Wtype_MAX - 1) 245 246#if W_TYPE_SIZE == 8 247# define Wtype_MAXp1_F 0x1p8f 248#elif W_TYPE_SIZE == 16 249# define Wtype_MAXp1_F 0x1p16f 250#elif W_TYPE_SIZE == 32 251# define Wtype_MAXp1_F 0x1p32f 252#elif W_TYPE_SIZE == 64 253# define Wtype_MAXp1_F 0x1p64f 254#else 255# error "expand the table" 256#endif 257 258#define __muldi3 __NDW(mul,3) 259#define __divdi3 __NDW(div,3) 260#define __udivdi3 __NDW(udiv,3) 261#define __moddi3 __NDW(mod,3) 262#define __umoddi3 __NDW(umod,3) 263#define __negdi2 __NDW(neg,2) 264#define __lshrdi3 __NDW(lshr,3) 265#define __ashldi3 __NDW(ashl,3) 266#define __ashrdi3 __NDW(ashr,3) 267#define __cmpdi2 __NDW(cmp,2) 268#define __ucmpdi2 __NDW(ucmp,2) 269#define __udivmoddi4 __NDW(udivmod,4) 270#define __fixunstfDI __NDW(fixunstf,) 271#define __fixtfdi __NDW(fixtf,) 272#define __fixunsxfDI __NDW(fixunsxf,) 273#define __fixxfdi __NDW(fixxf,) 274#define __fixunsdfDI __NDW(fixunsdf,) 275#define __fixdfdi __NDW(fixdf,) 276#define __fixunssfDI __NDW(fixunssf,) 277#define __fixsfdi __NDW(fixsf,) 278#define __floatdixf __NDW(float,xf) 279#define __floatditf __NDW(float,tf) 280#define __floatdidf __NDW(float,df) 281#define __floatdisf __NDW(float,sf) 282#define __floatundixf __NDW(floatun,xf) 283#define __floatunditf __NDW(floatun,tf) 284#define __floatundidf __NDW(floatun,df) 285#define __floatundisf __NDW(floatun,sf) 286#define __fixunsxfSI __NW(fixunsxf,) 287#define __fixunstfSI __NW(fixunstf,) 288#define __fixunsdfSI __NW(fixunsdf,) 289#define __fixunssfSI __NW(fixunssf,) 290 291#define __absvSI2 __NW(absv,2) 292#define __addvSI3 __NW(addv,3) 293#define __subvSI3 __NW(subv,3) 294#define __mulvSI3 __NW(mulv,3) 295#define __negvSI2 __NW(negv,2) 296#define __absvDI2 __NDW(absv,2) 297#define __addvDI3 __NDW(addv,3) 298#define __subvDI3 __NDW(subv,3) 299#define __mulvDI3 __NDW(mulv,3) 300#define __negvDI2 __NDW(negv,2) 301 302#define __ffsSI2 __NW(ffs,2) 303#define __clzSI2 __NW(clz,2) 304#define __ctzSI2 __NW(ctz,2) 305#define __popcountSI2 __NW(popcount,2) 306#define __paritySI2 __NW(parity,2) 307#define __ffsDI2 __NDW(ffs,2) 308#define __clzDI2 __NDW(clz,2) 309#define __ctzDI2 __NDW(ctz,2) 310#define __popcountDI2 __NDW(popcount,2) 311#define __parityDI2 __NDW(parity,2) 312 313extern DWtype __muldi3 (DWtype, DWtype); 314extern DWtype __divdi3 (DWtype, DWtype); 315extern UDWtype __udivdi3 (UDWtype, UDWtype); 316extern UDWtype __umoddi3 (UDWtype, UDWtype); 317extern DWtype __moddi3 (DWtype, DWtype); 318 319/* __udivmoddi4 is static inline when building other libgcc2 portions. */ 320#if (!defined (L_udivdi3) && !defined (L_divdi3) && \ 321 !defined (L_umoddi3) && !defined (L_moddi3)) 322extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *); 323#endif 324 325/* __negdi2 is static inline when building other libgcc2 portions. */ 326#if !defined(L_divdi3) && !defined(L_moddi3) 327extern DWtype __negdi2 (DWtype); 328#endif 329 330extern DWtype __lshrdi3 (DWtype, word_type); 331extern DWtype __ashldi3 (DWtype, word_type); 332extern DWtype __ashrdi3 (DWtype, word_type); 333 334/* __udiv_w_sdiv is static inline when building other libgcc2 portions. */ 335#if (!defined(L_udivdi3) && !defined(L_divdi3) && \ 336 !defined(L_umoddi3) && !defined(L_moddi3)) 337extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype); 338#endif 339 340extern word_type __cmpdi2 (DWtype, DWtype); 341extern word_type __ucmpdi2 (DWtype, DWtype); 342 343extern Wtype __absvSI2 (Wtype); 344extern Wtype __addvSI3 (Wtype, Wtype); 345extern Wtype __subvSI3 (Wtype, Wtype); 346extern Wtype __mulvSI3 (Wtype, Wtype); 347extern Wtype __negvSI2 (Wtype); 348extern UWtype __bswapsi2 (UWtype); 349extern DWtype __absvDI2 (DWtype); 350extern DWtype __addvDI3 (DWtype, DWtype); 351extern DWtype __subvDI3 (DWtype, DWtype); 352extern DWtype __mulvDI3 (DWtype, DWtype); 353extern DWtype __negvDI2 (DWtype); 354extern UDWtype __bswapdi2 (UDWtype); 355 356#ifdef COMPAT_SIMODE_TRAPPING_ARITHMETIC 357extern SItype __absvsi2 (SItype); 358extern SItype __addvsi3 (SItype, SItype); 359extern SItype __subvsi3 (SItype, SItype); 360extern SItype __mulvsi3 (SItype, SItype); 361extern SItype __negvsi2 (SItype); 362#endif /* COMPAT_SIMODE_TRAPPING_ARITHMETIC */ 363 364#undef int 365#if LIBGCC2_HAS_SF_MODE 366extern DWtype __fixsfdi (SFtype); 367extern SFtype __floatdisf (DWtype); 368extern SFtype __floatundisf (UDWtype); 369extern UWtype __fixunssfSI (SFtype); 370extern DWtype __fixunssfDI (SFtype); 371extern SFtype __powisf2 (SFtype, int); 372extern SCtype __divsc3 (SFtype, SFtype, SFtype, SFtype); 373extern SCtype __mulsc3 (SFtype, SFtype, SFtype, SFtype); 374#endif 375#if LIBGCC2_HAS_DF_MODE 376extern DWtype __fixdfdi (DFtype); 377extern DFtype __floatdidf (DWtype); 378extern DFtype __floatundidf (UDWtype); 379extern UWtype __fixunsdfSI (DFtype); 380extern DWtype __fixunsdfDI (DFtype); 381extern DFtype __powidf2 (DFtype, int); 382extern DCtype __divdc3 (DFtype, DFtype, DFtype, DFtype); 383extern DCtype __muldc3 (DFtype, DFtype, DFtype, DFtype); 384#endif 385 386#if LIBGCC2_HAS_XF_MODE 387extern DWtype __fixxfdi (XFtype); 388extern DWtype __fixunsxfDI (XFtype); 389extern XFtype __floatdixf (DWtype); 390extern XFtype __floatundixf (UDWtype); 391extern UWtype __fixunsxfSI (XFtype); 392extern XFtype __powixf2 (XFtype, int); 393extern XCtype __divxc3 (XFtype, XFtype, XFtype, XFtype); 394extern XCtype __mulxc3 (XFtype, XFtype, XFtype, XFtype); 395#endif 396 397#if LIBGCC2_HAS_TF_MODE 398extern DWtype __fixunstfDI (TFtype); 399extern DWtype __fixtfdi (TFtype); 400extern TFtype __floatditf (DWtype); 401extern TFtype __floatunditf (UDWtype); 402extern TFtype __powitf2 (TFtype, int); 403extern TCtype __divtc3 (TFtype, TFtype, TFtype, TFtype); 404extern TCtype __multc3 (TFtype, TFtype, TFtype, TFtype); 405#endif 406#define int bogus_type 407 408/* DWstructs are pairs of Wtype values in the order determined by 409 LIBGCC2_WORDS_BIG_ENDIAN. */ 410 411#if LIBGCC2_WORDS_BIG_ENDIAN 412 struct DWstruct {Wtype high, low;}; 413#else 414 struct DWstruct {Wtype low, high;}; 415#endif 416 417/* We need this union to unpack/pack DImode values, since we don't have 418 any arithmetic yet. Incoming DImode parameters are stored into the 419 `ll' field, and the unpacked result is read from the struct `s'. */ 420 421typedef union 422{ 423 struct DWstruct s; 424 DWtype ll; 425} DWunion; 426 427/* Defined for L_popcount_tab. Exported here because some targets may 428 want to use it for their own versions of the __popcount builtins. */ 429extern const UQItype __popcount_tab[256]; 430 431/* Defined for L_clz. Exported here because some targets may want to use 432 it for their own versions of the __clz builtins. It contains the bit 433 position of the first set bit for the numbers 0 - 255. This avoids the 434 need for a separate table for the __ctz builtins. */ 435extern const UQItype __clz_tab[256]; 436 437#include "longlong.h" 438 439#undef int 440extern int __clzDI2 (UDWtype); 441extern int __clzSI2 (UWtype); 442extern int __ctzSI2 (UWtype); 443extern int __ffsSI2 (UWtype); 444extern int __ffsDI2 (DWtype); 445extern int __ctzDI2 (UDWtype); 446extern int __popcountSI2 (UWtype); 447extern int __popcountDI2 (UDWtype); 448extern int __paritySI2 (UWtype); 449extern int __parityDI2 (UDWtype); 450#define int bogus_type 451 452extern void __enable_execute_stack (void *); 453 454#ifndef HIDE_EXPORTS 455#pragma GCC visibility pop 456#endif 457 458#endif /* ! GCC_LIBGCC2_H */ 459