1 /* Header file for libgcc2.c. */ 2 /* Copyright (C) 2000, 2001, 2004, 2005, 2009, 2010 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 3, 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 Under Section 7 of GPL version 3, you are granted additional 18 permissions described in the GCC Runtime Library Exception, version 19 3.1, as published by the Free Software Foundation. 20 21 You should have received a copy of the GNU General Public License and 22 a copy of the GCC Runtime Library Exception along with this program; 23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 <http://www.gnu.org/licenses/>. */ 25 26 #ifndef GCC_LIBGCC2_H 27 #define GCC_LIBGCC2_H 28 29 #ifndef HIDE_EXPORTS 30 #pragma GCC visibility push(default) 31 #endif 32 33 extern int __gcc_bcmp (const unsigned char *, const unsigned char *, size_t); 34 extern void __clear_cache (char *, char *); 35 extern void __eprintf (const char *, const char *, unsigned int, const char *) 36 __attribute__ ((__noreturn__)); 37 38 #ifndef LIBGCC2_LONG_DOUBLE_TYPE_SIZE 39 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE LONG_DOUBLE_TYPE_SIZE 40 #endif 41 42 #ifndef LIBGCC2_HAS_SF_MODE 43 #define LIBGCC2_HAS_SF_MODE (BITS_PER_UNIT == 8) 44 #endif 45 46 #ifndef LIBGCC2_HAS_DF_MODE 47 #define LIBGCC2_HAS_DF_MODE \ 48 (BITS_PER_UNIT == 8 \ 49 && (__SIZEOF_DOUBLE__ * __CHAR_BIT__ == 64 \ 50 || LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 64)) 51 #endif 52 53 #ifndef LIBGCC2_HAS_XF_MODE 54 #define LIBGCC2_HAS_XF_MODE \ 55 (BITS_PER_UNIT == 8 && LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 80) 56 #endif 57 58 #ifndef LIBGCC2_HAS_TF_MODE 59 #define LIBGCC2_HAS_TF_MODE \ 60 (BITS_PER_UNIT == 8 && LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128) 61 #endif 62 63 #ifndef SF_SIZE 64 #if LIBGCC2_HAS_SF_MODE 65 #define SF_SIZE FLT_MANT_DIG 66 #else 67 #define SF_SIZE 0 68 #endif 69 #endif 70 71 #ifndef DF_SIZE 72 #if LIBGCC2_HAS_DF_MODE 73 #if __SIZEOF_DOUBLE__ * __CHAR_BIT__ == 64 74 #define DF_SIZE DBL_MANT_DIG 75 #elif LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 64 76 #define DF_SIZE LDBL_MANT_DIG 77 #else 78 #define DF_SIZE 0 79 #endif 80 #else 81 #define DF_SIZE 0 82 #endif 83 #endif 84 85 #ifndef XF_SIZE 86 #if LIBGCC2_HAS_XF_MODE 87 #define XF_SIZE LDBL_MANT_DIG 88 #else 89 #define XF_SIZE 0 90 #endif 91 #endif 92 93 #ifndef TF_SIZE 94 #if LIBGCC2_HAS_TF_MODE 95 #define TF_SIZE LDBL_MANT_DIG 96 #else 97 #define TF_SIZE 0 98 #endif 99 #endif 100 101 /* FIXME: This #ifdef probably should be removed, ie. enable the test 102 for mips too. */ 103 /* Don't use IBM Extended Double TFmode for TI->SF calculations. 104 The conversion from long double to float suffers from double 105 rounding, because we convert via double. In other cases, going 106 through the software fp routines is much slower than the fallback. */ 107 #ifdef __powerpc__ 108 #define AVOID_FP_TYPE_CONVERSION(SIZE) (SIZE == 106) 109 #elif defined(WIDEST_HARDWARE_FP_SIZE) 110 #define AVOID_FP_TYPE_CONVERSION(SIZE) (SIZE > WIDEST_HARDWARE_FP_SIZE) 111 #else 112 #define AVOID_FP_TYPE_CONVERSION(SIZE) 0 113 #endif 114 115 /* In the first part of this file, we are interfacing to calls generated 116 by the compiler itself. These calls pass values into these routines 117 which have very specific modes (rather than very specific types), and 118 these compiler-generated calls also expect any return values to have 119 very specific modes (rather than very specific types). Thus, we need 120 to avoid using regular C language type names in this part of the file 121 because the sizes for those types can be configured to be anything. 122 Instead we use the following special type names. */ 123 124 typedef int QItype __attribute__ ((mode (QI))); 125 typedef unsigned int UQItype __attribute__ ((mode (QI))); 126 typedef int HItype __attribute__ ((mode (HI))); 127 typedef unsigned int UHItype __attribute__ ((mode (HI))); 128 #if MIN_UNITS_PER_WORD > 1 129 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1. */ 130 typedef int SItype __attribute__ ((mode (SI))); 131 typedef unsigned int USItype __attribute__ ((mode (SI))); 132 #if __SIZEOF_LONG_LONG__ > 4 133 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2. */ 134 typedef int DItype __attribute__ ((mode (DI))); 135 typedef unsigned int UDItype __attribute__ ((mode (DI))); 136 #if MIN_UNITS_PER_WORD > 4 137 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4. */ 138 typedef int TItype __attribute__ ((mode (TI))); 139 typedef unsigned int UTItype __attribute__ ((mode (TI))); 140 #endif 141 #endif 142 #endif 143 144 #if LIBGCC2_HAS_SF_MODE 145 typedef float SFtype __attribute__ ((mode (SF))); 146 typedef _Complex float SCtype __attribute__ ((mode (SC))); 147 #endif 148 #if LIBGCC2_HAS_DF_MODE 149 typedef float DFtype __attribute__ ((mode (DF))); 150 typedef _Complex float DCtype __attribute__ ((mode (DC))); 151 #endif 152 #if LIBGCC2_HAS_XF_MODE 153 typedef float XFtype __attribute__ ((mode (XF))); 154 typedef _Complex float XCtype __attribute__ ((mode (XC))); 155 #endif 156 #if LIBGCC2_HAS_TF_MODE 157 typedef float TFtype __attribute__ ((mode (TF))); 158 typedef _Complex float TCtype __attribute__ ((mode (TC))); 159 #endif 160 161 typedef int cmp_return_type __attribute__((mode (__libgcc_cmp_return__))); 162 typedef int shift_count_type __attribute__((mode (__libgcc_shift_count__))); 163 164 /* Make sure that we don't accidentally use any normal C language built-in 165 type names in the first part of this file. Instead we want to use *only* 166 the type names defined above. The following macro definitions insure 167 that if we *do* accidentally use some normal C language built-in type name, 168 we will get a syntax error. */ 169 170 #define char bogus_type 171 #define short bogus_type 172 #define int bogus_type 173 #define long bogus_type 174 #define unsigned bogus_type 175 #define float bogus_type 176 #define double bogus_type 177 178 /* Versions prior to 3.4.4 were not taking into account the word size for 179 the 5 trapping arithmetic functions absv, addv, subv, mulv and negv. As 180 a consequence, the si and di variants were always and the only ones emitted. 181 To maintain backward compatibility, COMPAT_SIMODE_TRAPPING_ARITHMETIC is 182 defined on platforms where it makes sense to still have the si variants 183 emitted. As a bonus, their implementation is now correct. Note that the 184 same mechanism should have been implemented for the di variants, but it 185 turns out that no platform would define COMPAT_DIMODE_TRAPPING_ARITHMETIC 186 if it existed. */ 187 188 #if LIBGCC2_UNITS_PER_WORD == 8 189 #define W_TYPE_SIZE (8 * BITS_PER_UNIT) 190 #define Wtype DItype 191 #define UWtype UDItype 192 #define HWtype DItype 193 #define UHWtype UDItype 194 #define DWtype TItype 195 #define UDWtype UTItype 196 #ifdef LIBGCC2_GNU_PREFIX 197 #define __NW(a,b) __gnu_ ## a ## di ## b 198 #define __NDW(a,b) __gnu_ ## a ## ti ## b 199 #else 200 #define __NW(a,b) __ ## a ## di ## b 201 #define __NDW(a,b) __ ## a ## ti ## b 202 #endif 203 #define COMPAT_SIMODE_TRAPPING_ARITHMETIC 204 #elif LIBGCC2_UNITS_PER_WORD == 4 205 #define W_TYPE_SIZE (4 * BITS_PER_UNIT) 206 #define Wtype SItype 207 #define UWtype USItype 208 #define HWtype SItype 209 #define UHWtype USItype 210 #define DWtype DItype 211 #define UDWtype UDItype 212 #ifdef LIBGCC2_GNU_PREFIX 213 #define __NW(a,b) __gnu_ ## a ## si ## b 214 #define __NDW(a,b) __gnu_ ## a ## di ## b 215 #else 216 #define __NW(a,b) __ ## a ## si ## b 217 #define __NDW(a,b) __ ## a ## di ## b 218 #endif 219 #elif LIBGCC2_UNITS_PER_WORD == 2 220 #define W_TYPE_SIZE (2 * BITS_PER_UNIT) 221 #define Wtype HItype 222 #define UWtype UHItype 223 #define HWtype HItype 224 #define UHWtype UHItype 225 #define DWtype SItype 226 #define UDWtype USItype 227 #ifdef LIBGCC2_GNU_PREFIX 228 #define __NW(a,b) __gnu_ ## a ## hi ## b 229 #define __NDW(a,b) __gnu_ ## a ## si ## b 230 #else 231 #define __NW(a,b) __ ## a ## hi ## b 232 #define __NDW(a,b) __ ## a ## si ## b 233 #endif 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 #ifdef LIBGCC2_GNU_PREFIX 243 #define __NW(a,b) __gnu_ ## a ## qi ## b 244 #define __NDW(a,b) __gnu_ ## a ## hi ## b 245 #else 246 #define __NW(a,b) __ ## a ## qi ## b 247 #define __NDW(a,b) __ ## a ## hi ## b 248 #endif 249 #endif 250 251 #ifdef LIBGCC2_GNU_PREFIX 252 #define __N(a) __gnu_ ## a 253 #else 254 #define __N(a) __ ## a 255 #endif 256 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1)) 257 #define Wtype_MIN (- Wtype_MAX - 1) 258 259 #if W_TYPE_SIZE == 8 260 # define Wtype_MAXp1_F 0x1p8f 261 #elif W_TYPE_SIZE == 16 262 # define Wtype_MAXp1_F 0x1p16f 263 #elif W_TYPE_SIZE == 32 264 # define Wtype_MAXp1_F 0x1p32f 265 #elif W_TYPE_SIZE == 64 266 # define Wtype_MAXp1_F 0x1p64f 267 #else 268 # error "expand the table" 269 #endif 270 271 #define __muldi3 __NDW(mul,3) 272 #define __divdi3 __NDW(div,3) 273 #define __udivdi3 __NDW(udiv,3) 274 #define __moddi3 __NDW(mod,3) 275 #define __umoddi3 __NDW(umod,3) 276 #define __negdi2 __NDW(neg,2) 277 #define __lshrdi3 __NDW(lshr,3) 278 #define __ashldi3 __NDW(ashl,3) 279 #define __ashrdi3 __NDW(ashr,3) 280 #define __cmpdi2 __NDW(cmp,2) 281 #define __ucmpdi2 __NDW(ucmp,2) 282 #define __udivmoddi4 __NDW(udivmod,4) 283 #define __fixunstfDI __NDW(fixunstf,) 284 #define __fixtfdi __NDW(fixtf,) 285 #define __fixunsxfDI __NDW(fixunsxf,) 286 #define __fixxfdi __NDW(fixxf,) 287 #define __fixunsdfDI __NDW(fixunsdf,) 288 #define __fixdfdi __NDW(fixdf,) 289 #define __fixunssfDI __NDW(fixunssf,) 290 #define __fixsfdi __NDW(fixsf,) 291 #define __floatdixf __NDW(float,xf) 292 #define __floatditf __NDW(float,tf) 293 #define __floatdidf __NDW(float,df) 294 #define __floatdisf __NDW(float,sf) 295 #define __floatundixf __NDW(floatun,xf) 296 #define __floatunditf __NDW(floatun,tf) 297 #define __floatundidf __NDW(floatun,df) 298 #define __floatundisf __NDW(floatun,sf) 299 #define __fixunsxfSI __NW(fixunsxf,) 300 #define __fixunstfSI __NW(fixunstf,) 301 #define __fixunsdfSI __NW(fixunsdf,) 302 #define __fixunssfSI __NW(fixunssf,) 303 304 #define __absvSI2 __NW(absv,2) 305 #define __addvSI3 __NW(addv,3) 306 #define __subvSI3 __NW(subv,3) 307 #define __mulvSI3 __NW(mulv,3) 308 #define __negvSI2 __NW(negv,2) 309 #define __absvDI2 __NDW(absv,2) 310 #define __addvDI3 __NDW(addv,3) 311 #define __subvDI3 __NDW(subv,3) 312 #define __mulvDI3 __NDW(mulv,3) 313 #define __negvDI2 __NDW(negv,2) 314 315 #define __ffsSI2 __NW(ffs,2) 316 #define __clzSI2 __NW(clz,2) 317 #define __ctzSI2 __NW(ctz,2) 318 #define __clrsbSI2 __NW(clrsb,2) 319 #define __popcountSI2 __NW(popcount,2) 320 #define __paritySI2 __NW(parity,2) 321 #define __ffsDI2 __NDW(ffs,2) 322 #define __clzDI2 __NDW(clz,2) 323 #define __ctzDI2 __NDW(ctz,2) 324 #define __clrsbDI2 __NDW(clrsb,2) 325 #define __popcountDI2 __NDW(popcount,2) 326 #define __parityDI2 __NDW(parity,2) 327 328 #define __clz_tab __N(clz_tab) 329 #define __bswapsi2 __N(bswapsi2) 330 #define __bswapdi2 __N(bswapdi2) 331 #define __udiv_w_sdiv __N(udiv_w_sdiv) 332 #define __clear_cache __N(clear_cache) 333 #define __enable_execute_stack __N(enable_execute_stack) 334 335 #ifndef __powisf2 336 #define __powisf2 __N(powisf2) 337 #endif 338 #ifndef __powidf2 339 #define __powidf2 __N(powidf2) 340 #endif 341 #ifndef __powitf2 342 #define __powitf2 __N(powitf2) 343 #endif 344 #ifndef __powixf2 345 #define __powixf2 __N(powixf2) 346 #endif 347 #ifndef __mulsc3 348 #define __mulsc3 __N(mulsc3) 349 #endif 350 #ifndef __muldc3 351 #define __muldc3 __N(muldc3) 352 #endif 353 #ifndef __mulxc3 354 #define __mulxc3 __N(mulxc3) 355 #endif 356 #ifndef __multc3 357 #define __multc3 __N(multc3) 358 #endif 359 #ifndef __divsc3 360 #define __divsc3 __N(divsc3) 361 #endif 362 #ifndef __divdc3 363 #define __divdc3 __N(divdc3) 364 #endif 365 #ifndef __divxc3 366 #define __divxc3 __N(divxc3) 367 #endif 368 #ifndef __divtc3 369 #define __divtc3 __N(divtc3) 370 #endif 371 372 extern DWtype __muldi3 (DWtype, DWtype); 373 extern DWtype __divdi3 (DWtype, DWtype); 374 extern UDWtype __udivdi3 (UDWtype, UDWtype); 375 extern UDWtype __umoddi3 (UDWtype, UDWtype); 376 extern DWtype __moddi3 (DWtype, DWtype); 377 378 /* __udivmoddi4 is static inline when building other libgcc2 portions. */ 379 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \ 380 !defined (L_umoddi3) && !defined (L_moddi3)) 381 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *); 382 #endif 383 384 /* __negdi2 is static inline when building other libgcc2 portions. */ 385 #if !defined(L_divdi3) && !defined(L_moddi3) 386 extern DWtype __negdi2 (DWtype); 387 #endif 388 389 extern DWtype __lshrdi3 (DWtype, shift_count_type); 390 extern DWtype __ashldi3 (DWtype, shift_count_type); 391 extern DWtype __ashrdi3 (DWtype, shift_count_type); 392 393 /* __udiv_w_sdiv is static inline when building other libgcc2 portions. */ 394 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \ 395 !defined(L_umoddi3) && !defined(L_moddi3)) 396 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype); 397 #endif 398 399 extern cmp_return_type __cmpdi2 (DWtype, DWtype); 400 extern cmp_return_type __ucmpdi2 (DWtype, DWtype); 401 402 #if MIN_UNITS_PER_WORD > 1 403 extern SItype __bswapsi2 (SItype); 404 #endif 405 #if __SIZEOF_LONG_LONG__ > 4 406 extern DItype __bswapdi2 (DItype); 407 #endif 408 409 extern Wtype __absvSI2 (Wtype); 410 extern Wtype __addvSI3 (Wtype, Wtype); 411 extern Wtype __subvSI3 (Wtype, Wtype); 412 extern Wtype __mulvSI3 (Wtype, Wtype); 413 extern Wtype __negvSI2 (Wtype); 414 extern DWtype __absvDI2 (DWtype); 415 extern DWtype __addvDI3 (DWtype, DWtype); 416 extern DWtype __subvDI3 (DWtype, DWtype); 417 extern DWtype __mulvDI3 (DWtype, DWtype); 418 extern DWtype __negvDI2 (DWtype); 419 420 #ifdef COMPAT_SIMODE_TRAPPING_ARITHMETIC 421 #define __absvsi2 __N(absvsi2) 422 #define __negvsi2 __N(negvsi2) 423 #define __addvsi3 __N(addvsi3) 424 #define __subvsi3 __N(subvsi3) 425 #define __mulvsi3 __N(mulvsi3) 426 427 extern SItype __absvsi2 (SItype); 428 extern SItype __addvsi3 (SItype, SItype); 429 extern SItype __subvsi3 (SItype, SItype); 430 extern SItype __mulvsi3 (SItype, SItype); 431 extern SItype __negvsi2 (SItype); 432 #endif /* COMPAT_SIMODE_TRAPPING_ARITHMETIC */ 433 434 #undef int 435 #if LIBGCC2_HAS_SF_MODE 436 extern DWtype __fixsfdi (SFtype); 437 extern SFtype __floatdisf (DWtype); 438 extern SFtype __floatundisf (UDWtype); 439 extern UWtype __fixunssfSI (SFtype); 440 extern UDWtype __fixunssfDI (SFtype); 441 extern SFtype __powisf2 (SFtype, int); 442 extern SCtype __divsc3 (SFtype, SFtype, SFtype, SFtype); 443 extern SCtype __mulsc3 (SFtype, SFtype, SFtype, SFtype); 444 #endif 445 #if LIBGCC2_HAS_DF_MODE 446 extern DWtype __fixdfdi (DFtype); 447 extern DFtype __floatdidf (DWtype); 448 extern DFtype __floatundidf (UDWtype); 449 extern UWtype __fixunsdfSI (DFtype); 450 extern UDWtype __fixunsdfDI (DFtype); 451 extern DFtype __powidf2 (DFtype, int); 452 extern DCtype __divdc3 (DFtype, DFtype, DFtype, DFtype); 453 extern DCtype __muldc3 (DFtype, DFtype, DFtype, DFtype); 454 #endif 455 456 #if LIBGCC2_HAS_XF_MODE 457 extern DWtype __fixxfdi (XFtype); 458 extern UDWtype __fixunsxfDI (XFtype); 459 extern XFtype __floatdixf (DWtype); 460 extern XFtype __floatundixf (UDWtype); 461 extern UWtype __fixunsxfSI (XFtype); 462 extern XFtype __powixf2 (XFtype, int); 463 extern XCtype __divxc3 (XFtype, XFtype, XFtype, XFtype); 464 extern XCtype __mulxc3 (XFtype, XFtype, XFtype, XFtype); 465 #endif 466 467 #if LIBGCC2_HAS_TF_MODE 468 extern UDWtype __fixunstfDI (TFtype); 469 extern DWtype __fixtfdi (TFtype); 470 extern TFtype __floatditf (DWtype); 471 extern TFtype __floatunditf (UDWtype); 472 extern TFtype __powitf2 (TFtype, int); 473 extern TCtype __divtc3 (TFtype, TFtype, TFtype, TFtype); 474 extern TCtype __multc3 (TFtype, TFtype, TFtype, TFtype); 475 #endif 476 #define int bogus_type 477 478 /* DWstructs are pairs of Wtype values in the order determined by 479 __BYTE_ORDER__. */ 480 481 #if __BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__ 482 struct DWstruct {Wtype high, low;}; 483 #else 484 struct DWstruct {Wtype low, high;}; 485 #endif 486 487 /* We need this union to unpack/pack DImode values, since we don't have 488 any arithmetic yet. Incoming DImode parameters are stored into the 489 `ll' field, and the unpacked result is read from the struct `s'. */ 490 491 typedef union 492 { 493 struct DWstruct s; 494 DWtype ll; 495 } DWunion; 496 497 /* Defined for L_popcount_tab. Exported here because some targets may 498 want to use it for their own versions of the __popcount builtins. */ 499 extern const UQItype __popcount_tab[256]; 500 501 /* Defined for L_clz. Exported here because some targets may want to use 502 it for their own versions of the __clz builtins. It contains the bit 503 position of the first set bit for the numbers 0 - 255. This avoids the 504 need for a separate table for the __ctz builtins. */ 505 extern const UQItype __clz_tab[256]; 506 507 #include "longlong.h" 508 509 #undef int 510 extern int __clzDI2 (UDWtype); 511 extern int __clzSI2 (UWtype); 512 extern int __ctzSI2 (UWtype); 513 extern int __ctzDI2 (UDWtype); 514 extern int __clrsbSI2 (Wtype); 515 extern int __clrsbDI2 (DWtype); 516 extern int __ffsSI2 (UWtype); 517 extern int __ffsDI2 (DWtype); 518 extern int __popcountSI2 (UWtype); 519 extern int __popcountDI2 (UDWtype); 520 extern int __paritySI2 (UWtype); 521 extern int __parityDI2 (UDWtype); 522 #define int bogus_type 523 524 extern void __enable_execute_stack (void *); 525 526 #ifndef HIDE_EXPORTS 527 #pragma GCC visibility pop 528 #endif 529 530 #endif /* ! GCC_LIBGCC2_H */ 531