1 /* Header file for libgcc2.c. */ 2 /* Copyright (C) 2000-2022 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify it under 7 the terms of the GNU General Public License as published by the Free 8 Software Foundation; either version 3, or (at your option) any later 9 version. 10 11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 for more details. 15 16 Under Section 7 of GPL version 3, you are granted additional 17 permissions described in the GCC Runtime Library Exception, version 18 3.1, as published by the Free Software Foundation. 19 20 You should have received a copy of the GNU General Public License and 21 a copy of the GCC Runtime Library Exception along with this program; 22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 <http://www.gnu.org/licenses/>. */ 24 25 #ifndef GCC_LIBGCC2_H 26 #define GCC_LIBGCC2_H 27 28 #ifndef HIDE_EXPORTS 29 #pragma GCC visibility push(default) 30 #endif 31 32 extern int __gcc_bcmp (const unsigned char *, const unsigned char *, size_t); 33 extern void __clear_cache (void *, void *); 34 extern void __eprintf (const char *, const char *, unsigned int, const char *) 35 __attribute__ ((__noreturn__)); 36 37 #ifdef __LIBGCC_HAS_HF_MODE__ 38 #define LIBGCC2_HAS_HF_MODE 1 39 #else 40 #define LIBGCC2_HAS_HF_MODE 0 41 #endif 42 43 #ifdef __LIBGCC_HAS_SF_MODE__ 44 #define LIBGCC2_HAS_SF_MODE 1 45 #else 46 #define LIBGCC2_HAS_SF_MODE 0 47 #endif 48 49 #ifdef __LIBGCC_HAS_DF_MODE__ 50 #define LIBGCC2_HAS_DF_MODE 1 51 #else 52 #define LIBGCC2_HAS_DF_MODE 0 53 #endif 54 55 #ifdef __LIBGCC_HAS_XF_MODE__ 56 #define LIBGCC2_HAS_XF_MODE 1 57 #else 58 #define LIBGCC2_HAS_XF_MODE 0 59 #endif 60 61 #ifdef __LIBGCC_HAS_TF_MODE__ 62 #define LIBGCC2_HAS_TF_MODE 1 63 #else 64 #define LIBGCC2_HAS_TF_MODE 0 65 #endif 66 67 #ifndef __LIBGCC_SF_MANT_DIG__ 68 #if LIBGCC2_HAS_SF_MODE 69 #error __LIBGCC_SF_MANT_DIG__ not defined 70 #else 71 #define __LIBGCC_SF_MANT_DIG__ 0 72 #endif 73 #endif 74 75 #ifndef __LIBGCC_DF_MANT_DIG__ 76 #if LIBGCC2_HAS_DF_MODE 77 #error __LIBGCC_DF_MANT_DIG__ not defined 78 #else 79 #define __LIBGCC_DF_MANT_DIG__ 0 80 #endif 81 #endif 82 83 #ifndef __LIBGCC_XF_MANT_DIG__ 84 #if LIBGCC2_HAS_XF_MODE 85 #error __LIBGCC_XF_MANT_DIG__ not defined 86 #else 87 #define __LIBGCC_XF_MANT_DIG__ 0 88 #endif 89 #endif 90 91 #ifndef __LIBGCC_TF_MANT_DIG__ 92 #if LIBGCC2_HAS_TF_MODE 93 #error __LIBGCC_TF_MANT_DIG__ not defined 94 #else 95 #define __LIBGCC_TF_MANT_DIG__ 0 96 #endif 97 #endif 98 99 /* FIXME: This #ifdef probably should be removed, ie. enable the test 100 for mips too. */ 101 /* Don't use IBM Extended Double TFmode for TI->SF calculations. 102 The conversion from long double to float suffers from double 103 rounding, because we convert via double. In other cases, going 104 through the software fp routines is much slower than the fallback. */ 105 #ifdef __powerpc__ 106 #define AVOID_FP_TYPE_CONVERSION(SIZE) (SIZE == 106) 107 #elif defined(WIDEST_HARDWARE_FP_SIZE) 108 #define AVOID_FP_TYPE_CONVERSION(SIZE) (SIZE > WIDEST_HARDWARE_FP_SIZE) 109 #else 110 #define AVOID_FP_TYPE_CONVERSION(SIZE) 0 111 #endif 112 113 /* In the first part of this file, we are interfacing to calls generated 114 by the compiler itself. These calls pass values into these routines 115 which have very specific modes (rather than very specific types), and 116 these compiler-generated calls also expect any return values to have 117 very specific modes (rather than very specific types). Thus, we need 118 to avoid using regular C language type names in this part of the file 119 because the sizes for those types can be configured to be anything. 120 Instead we use the following special type names. */ 121 122 typedef int QItype __attribute__ ((mode (QI))); 123 typedef unsigned int UQItype __attribute__ ((mode (QI))); 124 typedef int HItype __attribute__ ((mode (HI))); 125 typedef unsigned int UHItype __attribute__ ((mode (HI))); 126 #if MIN_UNITS_PER_WORD > 1 127 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1. */ 128 typedef int SItype __attribute__ ((mode (SI))); 129 typedef unsigned int USItype __attribute__ ((mode (SI))); 130 #if __SIZEOF_LONG_LONG__ > 4 131 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2. */ 132 typedef int DItype __attribute__ ((mode (DI))); 133 typedef unsigned int UDItype __attribute__ ((mode (DI))); 134 #if MIN_UNITS_PER_WORD > 4 135 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4. */ 136 typedef int TItype __attribute__ ((mode (TI))); 137 typedef unsigned int UTItype __attribute__ ((mode (TI))); 138 #endif 139 #endif 140 #endif 141 142 #if LIBGCC2_HAS_HF_MODE 143 typedef float HFtype __attribute__ ((mode (HF))); 144 typedef _Complex float HCtype __attribute__ ((mode (HC))); 145 #endif 146 #if LIBGCC2_HAS_SF_MODE 147 typedef float SFtype __attribute__ ((mode (SF))); 148 typedef _Complex float SCtype __attribute__ ((mode (SC))); 149 #endif 150 #if LIBGCC2_HAS_DF_MODE 151 typedef float DFtype __attribute__ ((mode (DF))); 152 typedef _Complex float DCtype __attribute__ ((mode (DC))); 153 #endif 154 #if LIBGCC2_HAS_XF_MODE 155 typedef float XFtype __attribute__ ((mode (XF))); 156 typedef _Complex float XCtype __attribute__ ((mode (XC))); 157 #endif 158 #if LIBGCC2_HAS_TF_MODE 159 typedef float TFtype __attribute__ ((mode (TF))); 160 typedef _Complex float TCtype __attribute__ ((mode (TC))); 161 #endif 162 163 typedef int cmp_return_type __attribute__((mode (__libgcc_cmp_return__))); 164 typedef int shift_count_type __attribute__((mode (__libgcc_shift_count__))); 165 166 /* Make sure that we don't accidentally use any normal C language built-in 167 type names in the first part of this file. Instead we want to use *only* 168 the type names defined above. The following macro definitions insure 169 that if we *do* accidentally use some normal C language built-in type name, 170 we will get a syntax error. */ 171 172 #define char bogus_type 173 #define short bogus_type 174 #define int bogus_type 175 #define long bogus_type 176 #define unsigned bogus_type 177 #define float bogus_type 178 #define double bogus_type 179 180 /* Versions prior to 3.4.4 were not taking into account the word size for 181 the 5 trapping arithmetic functions absv, addv, subv, mulv and negv. As 182 a consequence, the si and di variants were always and the only ones emitted. 183 To maintain backward compatibility, COMPAT_SIMODE_TRAPPING_ARITHMETIC is 184 defined on platforms where it makes sense to still have the si variants 185 emitted. As a bonus, their implementation is now correct. Note that the 186 same mechanism should have been implemented for the di variants, but it 187 turns out that no platform would define COMPAT_DIMODE_TRAPPING_ARITHMETIC 188 if it existed. */ 189 190 #if LIBGCC2_UNITS_PER_WORD == 8 191 #define W_TYPE_SIZE (8 * __CHAR_BIT__) 192 #define Wtype DItype 193 #define UWtype UDItype 194 #define HWtype DItype 195 #define UHWtype UDItype 196 #define DWtype TItype 197 #define UDWtype UTItype 198 #ifdef LIBGCC2_GNU_PREFIX 199 #define __NW(a,b) __gnu_ ## a ## di ## b 200 #define __NDW(a,b) __gnu_ ## a ## ti ## b 201 #else 202 #define __NW(a,b) __ ## a ## di ## b 203 #define __NDW(a,b) __ ## a ## ti ## b 204 #endif 205 #define COMPAT_SIMODE_TRAPPING_ARITHMETIC 206 #elif LIBGCC2_UNITS_PER_WORD == 4 207 #define W_TYPE_SIZE (4 * __CHAR_BIT__) 208 #define Wtype SItype 209 #define UWtype USItype 210 #define HWtype SItype 211 #define UHWtype USItype 212 #define DWtype DItype 213 #define UDWtype UDItype 214 #ifdef LIBGCC2_GNU_PREFIX 215 #define __NW(a,b) __gnu_ ## a ## si ## b 216 #define __NDW(a,b) __gnu_ ## a ## di ## b 217 #else 218 #define __NW(a,b) __ ## a ## si ## b 219 #define __NDW(a,b) __ ## a ## di ## b 220 #endif 221 #elif LIBGCC2_UNITS_PER_WORD == 2 222 #define W_TYPE_SIZE (2 * __CHAR_BIT__) 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 #ifdef LIBGCC2_GNU_PREFIX 230 #define __NW(a,b) __gnu_ ## a ## hi ## b 231 #define __NDW(a,b) __gnu_ ## a ## si ## b 232 #else 233 #define __NW(a,b) __ ## a ## hi ## b 234 #define __NDW(a,b) __ ## a ## si ## b 235 #endif 236 #else 237 #define W_TYPE_SIZE __CHAR_BIT__ 238 #define Wtype QItype 239 #define UWtype UQItype 240 #define HWtype QItype 241 #define UHWtype UQItype 242 #define DWtype HItype 243 #define UDWtype UHItype 244 #ifdef LIBGCC2_GNU_PREFIX 245 #define __NW(a,b) __gnu_ ## a ## qi ## b 246 #define __NDW(a,b) __gnu_ ## a ## hi ## b 247 #else 248 #define __NW(a,b) __ ## a ## qi ## b 249 #define __NDW(a,b) __ ## a ## hi ## b 250 #endif 251 #endif 252 253 #ifdef LIBGCC2_GNU_PREFIX 254 #define __N(a) __gnu_ ## a 255 #else 256 #define __N(a) __ ## a 257 #endif 258 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1)) 259 #define Wtype_MIN (- Wtype_MAX - 1) 260 261 #if W_TYPE_SIZE == 8 262 # define Wtype_MAXp1_F 0x1p8f 263 #elif W_TYPE_SIZE == 16 264 # define Wtype_MAXp1_F 0x1p16f 265 #elif W_TYPE_SIZE == 32 266 # define Wtype_MAXp1_F 0x1p32f 267 #elif W_TYPE_SIZE == 64 268 # define Wtype_MAXp1_F 0x1p64f 269 #else 270 # error "expand the table" 271 #endif 272 273 #define __muldi3 __NDW(mul,3) 274 #define __divdi3 __NDW(div,3) 275 #define __udivdi3 __NDW(udiv,3) 276 #define __moddi3 __NDW(mod,3) 277 #define __umoddi3 __NDW(umod,3) 278 #define __negdi2 __NDW(neg,2) 279 #define __lshrdi3 __NDW(lshr,3) 280 #define __ashldi3 __NDW(ashl,3) 281 #define __ashrdi3 __NDW(ashr,3) 282 #define __cmpdi2 __NDW(cmp,2) 283 #define __ucmpdi2 __NDW(ucmp,2) 284 #define __divmoddi4 __NDW(divmod,4) 285 #define __udivmoddi4 __NDW(udivmod,4) 286 #define __fixunstfDI __NDW(fixunstf,) 287 #define __fixtfdi __NDW(fixtf,) 288 #define __fixunsxfDI __NDW(fixunsxf,) 289 #define __fixxfdi __NDW(fixxf,) 290 #define __fixunsdfDI __NDW(fixunsdf,) 291 #define __fixdfdi __NDW(fixdf,) 292 #define __fixunssfDI __NDW(fixunssf,) 293 #define __fixsfdi __NDW(fixsf,) 294 #define __floatdixf __NDW(float,xf) 295 #define __floatditf __NDW(float,tf) 296 #define __floatdidf __NDW(float,df) 297 #define __floatdisf __NDW(float,sf) 298 #define __floatundixf __NDW(floatun,xf) 299 #define __floatunditf __NDW(floatun,tf) 300 #define __floatundidf __NDW(floatun,df) 301 #define __floatundisf __NDW(floatun,sf) 302 #define __fixunsxfSI __NW(fixunsxf,) 303 #define __fixunstfSI __NW(fixunstf,) 304 #define __fixunsdfSI __NW(fixunsdf,) 305 #define __fixunssfSI __NW(fixunssf,) 306 307 #define __absvSI2 __NW(absv,2) 308 #define __addvSI3 __NW(addv,3) 309 #define __subvSI3 __NW(subv,3) 310 #define __mulvSI3 __NW(mulv,3) 311 #define __negvSI2 __NW(negv,2) 312 #define __absvDI2 __NDW(absv,2) 313 #define __addvDI3 __NDW(addv,3) 314 #define __subvDI3 __NDW(subv,3) 315 #define __mulvDI3 __NDW(mulv,3) 316 #define __negvDI2 __NDW(negv,2) 317 318 #define __ffsSI2 __NW(ffs,2) 319 #define __clzSI2 __NW(clz,2) 320 #define __ctzSI2 __NW(ctz,2) 321 #define __clrsbSI2 __NW(clrsb,2) 322 #define __popcountSI2 __NW(popcount,2) 323 #define __paritySI2 __NW(parity,2) 324 #define __ffsDI2 __NDW(ffs,2) 325 #define __clzDI2 __NDW(clz,2) 326 #define __ctzDI2 __NDW(ctz,2) 327 #define __clrsbDI2 __NDW(clrsb,2) 328 #define __popcountDI2 __NDW(popcount,2) 329 #define __parityDI2 __NDW(parity,2) 330 331 #define __clz_tab __N(clz_tab) 332 #define __bswapsi2 __N(bswapsi2) 333 #define __bswapdi2 __N(bswapdi2) 334 #define __udiv_w_sdiv __N(udiv_w_sdiv) 335 #define __clear_cache __N(clear_cache) 336 #define __enable_execute_stack __N(enable_execute_stack) 337 338 #ifndef __powisf2 339 #define __powisf2 __N(powisf2) 340 #endif 341 #ifndef __powidf2 342 #define __powidf2 __N(powidf2) 343 #endif 344 #ifndef __powitf2 345 #define __powitf2 __N(powitf2) 346 #endif 347 #ifndef __powixf2 348 #define __powixf2 __N(powixf2) 349 #endif 350 #ifndef __mulsc3 351 #define __mulsc3 __N(mulsc3) 352 #endif 353 #ifndef __muldc3 354 #define __muldc3 __N(muldc3) 355 #endif 356 #ifndef __mulxc3 357 #define __mulxc3 __N(mulxc3) 358 #endif 359 #ifndef __multc3 360 #define __multc3 __N(multc3) 361 #endif 362 #ifndef __divsc3 363 #define __divsc3 __N(divsc3) 364 #endif 365 #ifndef __divdc3 366 #define __divdc3 __N(divdc3) 367 #endif 368 #ifndef __divxc3 369 #define __divxc3 __N(divxc3) 370 #endif 371 #ifndef __divtc3 372 #define __divtc3 __N(divtc3) 373 #endif 374 375 extern DWtype __muldi3 (DWtype, DWtype); 376 extern DWtype __divdi3 (DWtype, DWtype); 377 extern UDWtype __udivdi3 (UDWtype, UDWtype); 378 extern UDWtype __umoddi3 (UDWtype, UDWtype); 379 extern DWtype __moddi3 (DWtype, DWtype); 380 extern DWtype __divmoddi4 (DWtype, DWtype, DWtype *); 381 382 /* __udivmoddi4 is static inline when building other libgcc2 portions. */ 383 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \ 384 !defined (L_umoddi3) && !defined (L_moddi3) && \ 385 !defined (L_divmoddi4)) 386 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *); 387 #endif 388 389 /* __negdi2 is static inline when building other libgcc2 portions. */ 390 #if !defined(L_divdi3) && !defined(L_moddi3) 391 extern DWtype __negdi2 (DWtype); 392 #endif 393 394 extern DWtype __lshrdi3 (DWtype, shift_count_type); 395 extern DWtype __ashldi3 (DWtype, shift_count_type); 396 extern DWtype __ashrdi3 (DWtype, shift_count_type); 397 398 /* __udiv_w_sdiv is static inline when building other libgcc2 portions. */ 399 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \ 400 !defined(L_umoddi3) && !defined(L_moddi3)) 401 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype); 402 #endif 403 404 extern cmp_return_type __cmpdi2 (DWtype, DWtype); 405 extern cmp_return_type __ucmpdi2 (UDWtype, UDWtype); 406 407 #if MIN_UNITS_PER_WORD > 1 408 extern SItype __bswapsi2 (SItype); 409 #endif 410 #if __SIZEOF_LONG_LONG__ > 4 411 extern DItype __bswapdi2 (DItype); 412 #endif 413 414 extern Wtype __absvSI2 (Wtype); 415 extern Wtype __addvSI3 (Wtype, Wtype); 416 extern Wtype __subvSI3 (Wtype, Wtype); 417 extern Wtype __mulvSI3 (Wtype, Wtype); 418 extern Wtype __negvSI2 (Wtype); 419 extern DWtype __absvDI2 (DWtype); 420 extern DWtype __addvDI3 (DWtype, DWtype); 421 extern DWtype __subvDI3 (DWtype, DWtype); 422 extern DWtype __mulvDI3 (DWtype, DWtype); 423 extern DWtype __negvDI2 (DWtype); 424 425 #ifdef COMPAT_SIMODE_TRAPPING_ARITHMETIC 426 #define __absvsi2 __N(absvsi2) 427 #define __negvsi2 __N(negvsi2) 428 #define __addvsi3 __N(addvsi3) 429 #define __subvsi3 __N(subvsi3) 430 #define __mulvsi3 __N(mulvsi3) 431 432 extern SItype __absvsi2 (SItype); 433 extern SItype __addvsi3 (SItype, SItype); 434 extern SItype __subvsi3 (SItype, SItype); 435 extern SItype __mulvsi3 (SItype, SItype); 436 extern SItype __negvsi2 (SItype); 437 #endif /* COMPAT_SIMODE_TRAPPING_ARITHMETIC */ 438 439 #undef int 440 #if LIBGCC2_HAS_HF_MODE 441 extern HCtype __divhc3 (HFtype, HFtype, HFtype, HFtype); 442 extern HCtype __mulhc3 (HFtype, HFtype, HFtype, HFtype); 443 #endif 444 #if LIBGCC2_HAS_SF_MODE 445 extern DWtype __fixsfdi (SFtype); 446 extern SFtype __floatdisf (DWtype); 447 extern SFtype __floatundisf (UDWtype); 448 extern UWtype __fixunssfSI (SFtype); 449 extern UDWtype __fixunssfDI (SFtype); 450 extern SFtype __powisf2 (SFtype, int); 451 extern SCtype __divsc3 (SFtype, SFtype, SFtype, SFtype); 452 extern SCtype __mulsc3 (SFtype, SFtype, SFtype, SFtype); 453 #endif 454 #if LIBGCC2_HAS_DF_MODE 455 extern DWtype __fixdfdi (DFtype); 456 extern DFtype __floatdidf (DWtype); 457 extern DFtype __floatundidf (UDWtype); 458 extern UWtype __fixunsdfSI (DFtype); 459 extern UDWtype __fixunsdfDI (DFtype); 460 extern DFtype __powidf2 (DFtype, int); 461 extern DCtype __divdc3 (DFtype, DFtype, DFtype, DFtype); 462 extern DCtype __muldc3 (DFtype, DFtype, DFtype, DFtype); 463 #endif 464 465 #if LIBGCC2_HAS_XF_MODE 466 extern DWtype __fixxfdi (XFtype); 467 extern UDWtype __fixunsxfDI (XFtype); 468 extern XFtype __floatdixf (DWtype); 469 extern XFtype __floatundixf (UDWtype); 470 extern UWtype __fixunsxfSI (XFtype); 471 extern XFtype __powixf2 (XFtype, int); 472 extern XCtype __divxc3 (XFtype, XFtype, XFtype, XFtype); 473 extern XCtype __mulxc3 (XFtype, XFtype, XFtype, XFtype); 474 #endif 475 476 #if LIBGCC2_HAS_TF_MODE 477 extern UDWtype __fixunstfDI (TFtype); 478 extern DWtype __fixtfdi (TFtype); 479 extern TFtype __floatditf (DWtype); 480 extern TFtype __floatunditf (UDWtype); 481 extern TFtype __powitf2 (TFtype, int); 482 extern TCtype __divtc3 (TFtype, TFtype, TFtype, TFtype); 483 extern TCtype __multc3 (TFtype, TFtype, TFtype, TFtype); 484 #endif 485 #define int bogus_type 486 487 /* DWstructs are pairs of Wtype values in the order determined by 488 __BYTE_ORDER__. */ 489 490 #if __BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__ 491 struct DWstruct {Wtype high, low;}; 492 #else 493 struct DWstruct {Wtype low, high;}; 494 #endif 495 496 /* We need this union to unpack/pack DImode values, since we don't have 497 any arithmetic yet. Incoming DImode parameters are stored into the 498 `ll' field, and the unpacked result is read from the struct `s'. */ 499 500 typedef union 501 { 502 struct DWstruct s; 503 DWtype ll; 504 } DWunion; 505 506 /* Defined for L_popcount_tab. Exported here because some targets may 507 want to use it for their own versions of the __popcount builtins. */ 508 extern const UQItype __popcount_tab[256]; 509 510 /* Defined for L_clz. Exported here because some targets may want to use 511 it for their own versions of the __clz builtins. It contains the bit 512 position of the first set bit for the numbers 0 - 255. This avoids the 513 need for a separate table for the __ctz builtins. */ 514 extern const UQItype __clz_tab[256]; 515 516 #include "longlong.h" 517 518 #undef int 519 extern int __clzDI2 (UDWtype); 520 extern int __clzSI2 (UWtype); 521 extern int __ctzSI2 (UWtype); 522 extern int __ctzDI2 (UDWtype); 523 extern int __clrsbSI2 (Wtype); 524 extern int __clrsbDI2 (DWtype); 525 extern int __ffsSI2 (UWtype); 526 extern int __ffsDI2 (DWtype); 527 extern int __popcountSI2 (UWtype); 528 extern int __popcountDI2 (UDWtype); 529 extern int __paritySI2 (UWtype); 530 extern int __parityDI2 (UDWtype); 531 #define int bogus_type 532 533 extern void __enable_execute_stack (void *); 534 535 #ifndef HIDE_EXPORTS 536 #pragma GCC visibility pop 537 #endif 538 539 #endif /* ! GCC_LIBGCC2_H */ 540