1 /* Header file for libgcc2.c. */
2 /* Copyright (C) 2000, 2001, 2004, 2005, 2009
3 Free Software Foundation, Inc.
5 This file is part of GCC.
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
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
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.
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/>. */
30 #pragma GCC visibility push(default)
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__));
38 /* Permit the tm.h file to select the endianness to use just for this
39 file. This is used when the endianness is determined when the
42 #ifndef LIBGCC2_WORDS_BIG_ENDIAN
43 #define LIBGCC2_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
46 #ifndef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
47 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE LONG_DOUBLE_TYPE_SIZE
50 #ifndef LIBGCC2_HAS_SF_MODE
51 #define LIBGCC2_HAS_SF_MODE (BITS_PER_UNIT == 8)
54 #ifndef LIBGCC2_HAS_DF_MODE
55 #define LIBGCC2_HAS_DF_MODE \
57 && (__SIZEOF_DOUBLE__ * __CHAR_BIT__ == 64 \
58 || LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 64))
61 #ifndef LIBGCC2_HAS_XF_MODE
62 #define LIBGCC2_HAS_XF_MODE \
63 (BITS_PER_UNIT == 8 && LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 80)
66 #ifndef LIBGCC2_HAS_TF_MODE
67 #define LIBGCC2_HAS_TF_MODE \
68 (BITS_PER_UNIT == 8 && LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128)
72 #if LIBGCC2_HAS_SF_MODE
73 #define SF_SIZE FLT_MANT_DIG
80 #if LIBGCC2_HAS_DF_MODE
81 #if __SIZEOF_DOUBLE__ * __CHAR_BIT__ == 64
82 #define DF_SIZE DBL_MANT_DIG
83 #elif LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 64
84 #define DF_SIZE LDBL_MANT_DIG
94 #if LIBGCC2_HAS_XF_MODE
95 #define XF_SIZE LDBL_MANT_DIG
102 #if LIBGCC2_HAS_TF_MODE
103 #define TF_SIZE LDBL_MANT_DIG
109 /* FIXME: This #ifdef probably should be removed, ie. enable the test
111 /* Don't use IBM Extended Double TFmode for TI->SF calculations.
112 The conversion from long double to float suffers from double
113 rounding, because we convert via double. In other cases, going
114 through the software fp routines is much slower than the fallback. */
116 #define AVOID_FP_TYPE_CONVERSION(SIZE) (SIZE == 106)
117 #elif defined(WIDEST_HARDWARE_FP_SIZE)
118 #define AVOID_FP_TYPE_CONVERSION(SIZE) (SIZE > WIDEST_HARDWARE_FP_SIZE)
120 #define AVOID_FP_TYPE_CONVERSION(SIZE) 0
123 /* In the first part of this file, we are interfacing to calls generated
124 by the compiler itself. These calls pass values into these routines
125 which have very specific modes (rather than very specific types), and
126 these compiler-generated calls also expect any return values to have
127 very specific modes (rather than very specific types). Thus, we need
128 to avoid using regular C language type names in this part of the file
129 because the sizes for those types can be configured to be anything.
130 Instead we use the following special type names. */
132 typedef int QItype __attribute__ ((mode (QI)));
133 typedef unsigned int UQItype __attribute__ ((mode (QI)));
134 typedef int HItype __attribute__ ((mode (HI)));
135 typedef unsigned int UHItype __attribute__ ((mode (HI)));
136 #if MIN_UNITS_PER_WORD > 1
137 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1. */
138 typedef int SItype __attribute__ ((mode (SI)));
139 typedef unsigned int USItype __attribute__ ((mode (SI)));
140 #if __SIZEOF_LONG_LONG__ > 4
141 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2. */
142 typedef int DItype __attribute__ ((mode (DI)));
143 typedef unsigned int UDItype __attribute__ ((mode (DI)));
144 #if MIN_UNITS_PER_WORD > 4
145 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4. */
146 typedef int TItype __attribute__ ((mode (TI)));
147 typedef unsigned int UTItype __attribute__ ((mode (TI)));
152 #if LIBGCC2_HAS_SF_MODE
153 typedef float SFtype __attribute__ ((mode (SF)));
154 typedef _Complex float SCtype __attribute__ ((mode (SC)));
156 #if LIBGCC2_HAS_DF_MODE
157 typedef float DFtype __attribute__ ((mode (DF)));
158 typedef _Complex float DCtype __attribute__ ((mode (DC)));
160 #if LIBGCC2_HAS_XF_MODE
161 typedef float XFtype __attribute__ ((mode (XF)));
162 typedef _Complex float XCtype __attribute__ ((mode (XC)));
164 #if LIBGCC2_HAS_TF_MODE
165 typedef float TFtype __attribute__ ((mode (TF)));
166 typedef _Complex float TCtype __attribute__ ((mode (TC)));
169 typedef int cmp_return_type __attribute__((mode (__libgcc_cmp_return__)));
170 typedef int shift_count_type __attribute__((mode (__libgcc_shift_count__)));
172 /* Make sure that we don't accidentally use any normal C language built-in
173 type names in the first part of this file. Instead we want to use *only*
174 the type names defined above. The following macro definitions insure
175 that if we *do* accidentally use some normal C language built-in type name,
176 we will get a syntax error. */
178 #define char bogus_type
179 #define short bogus_type
180 #define int bogus_type
181 #define long bogus_type
182 #define unsigned bogus_type
183 #define float bogus_type
184 #define double bogus_type
186 /* Versions prior to 3.4.4 were not taking into account the word size for
187 the 5 trapping arithmetic functions absv, addv, subv, mulv and negv. As
188 a consequence, the si and di variants were always and the only ones emitted.
189 To maintain backward compatibility, COMPAT_SIMODE_TRAPPING_ARITHMETIC is
190 defined on platforms where it makes sense to still have the si variants
191 emitted. As a bonus, their implementation is now correct. Note that the
192 same mechanism should have been implemented for the di variants, but it
193 turns out that no platform would define COMPAT_DIMODE_TRAPPING_ARITHMETIC
196 #if LIBGCC2_UNITS_PER_WORD == 8
197 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
199 #define UWtype UDItype
200 #define HWtype DItype
201 #define UHWtype UDItype
202 #define DWtype TItype
203 #define UDWtype UTItype
204 #define __NW(a,b) __ ## a ## di ## b
205 #define __NDW(a,b) __ ## a ## ti ## b
206 #define COMPAT_SIMODE_TRAPPING_ARITHMETIC
207 #elif LIBGCC2_UNITS_PER_WORD == 4
208 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
210 #define UWtype USItype
211 #define HWtype SItype
212 #define UHWtype USItype
213 #define DWtype DItype
214 #define UDWtype UDItype
215 #define __NW(a,b) __ ## a ## si ## b
216 #define __NDW(a,b) __ ## a ## di ## b
217 #elif LIBGCC2_UNITS_PER_WORD == 2
218 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
220 #define UWtype UHItype
221 #define HWtype HItype
222 #define UHWtype UHItype
223 #define DWtype SItype
224 #define UDWtype USItype
225 #define __NW(a,b) __ ## a ## hi ## b
226 #define __NDW(a,b) __ ## a ## si ## b
228 #define W_TYPE_SIZE BITS_PER_UNIT
230 #define UWtype UQItype
231 #define HWtype QItype
232 #define UHWtype UQItype
233 #define DWtype HItype
234 #define UDWtype UHItype
235 #define __NW(a,b) __ ## a ## qi ## b
236 #define __NDW(a,b) __ ## a ## hi ## b
239 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
240 #define Wtype_MIN (- Wtype_MAX - 1)
243 # define Wtype_MAXp1_F 0x1p8f
244 #elif W_TYPE_SIZE == 16
245 # define Wtype_MAXp1_F 0x1p16f
246 #elif W_TYPE_SIZE == 32
247 # define Wtype_MAXp1_F 0x1p32f
248 #elif W_TYPE_SIZE == 64
249 # define Wtype_MAXp1_F 0x1p64f
251 # error "expand the table"
254 #define __muldi3 __NDW(mul,3)
255 #define __divdi3 __NDW(div,3)
256 #define __udivdi3 __NDW(udiv,3)
257 #define __moddi3 __NDW(mod,3)
258 #define __umoddi3 __NDW(umod,3)
259 #define __negdi2 __NDW(neg,2)
260 #define __lshrdi3 __NDW(lshr,3)
261 #define __ashldi3 __NDW(ashl,3)
262 #define __ashrdi3 __NDW(ashr,3)
263 #define __cmpdi2 __NDW(cmp,2)
264 #define __ucmpdi2 __NDW(ucmp,2)
265 #define __udivmoddi4 __NDW(udivmod,4)
266 #define __fixunstfDI __NDW(fixunstf,)
267 #define __fixtfdi __NDW(fixtf,)
268 #define __fixunsxfDI __NDW(fixunsxf,)
269 #define __fixxfdi __NDW(fixxf,)
270 #define __fixunsdfDI __NDW(fixunsdf,)
271 #define __fixdfdi __NDW(fixdf,)
272 #define __fixunssfDI __NDW(fixunssf,)
273 #define __fixsfdi __NDW(fixsf,)
274 #define __floatdixf __NDW(float,xf)
275 #define __floatditf __NDW(float,tf)
276 #define __floatdidf __NDW(float,df)
277 #define __floatdisf __NDW(float,sf)
278 #define __floatundixf __NDW(floatun,xf)
279 #define __floatunditf __NDW(floatun,tf)
280 #define __floatundidf __NDW(floatun,df)
281 #define __floatundisf __NDW(floatun,sf)
282 #define __fixunsxfSI __NW(fixunsxf,)
283 #define __fixunstfSI __NW(fixunstf,)
284 #define __fixunsdfSI __NW(fixunsdf,)
285 #define __fixunssfSI __NW(fixunssf,)
287 #define __absvSI2 __NW(absv,2)
288 #define __addvSI3 __NW(addv,3)
289 #define __subvSI3 __NW(subv,3)
290 #define __mulvSI3 __NW(mulv,3)
291 #define __negvSI2 __NW(negv,2)
292 #define __absvDI2 __NDW(absv,2)
293 #define __addvDI3 __NDW(addv,3)
294 #define __subvDI3 __NDW(subv,3)
295 #define __mulvDI3 __NDW(mulv,3)
296 #define __negvDI2 __NDW(negv,2)
298 #define __ffsSI2 __NW(ffs,2)
299 #define __clzSI2 __NW(clz,2)
300 #define __ctzSI2 __NW(ctz,2)
301 #define __popcountSI2 __NW(popcount,2)
302 #define __paritySI2 __NW(parity,2)
303 #define __ffsDI2 __NDW(ffs,2)
304 #define __clzDI2 __NDW(clz,2)
305 #define __ctzDI2 __NDW(ctz,2)
306 #define __popcountDI2 __NDW(popcount,2)
307 #define __parityDI2 __NDW(parity,2)
309 extern DWtype __muldi3 (DWtype, DWtype);
310 extern DWtype __divdi3 (DWtype, DWtype);
311 extern UDWtype __udivdi3 (UDWtype, UDWtype);
312 extern UDWtype __umoddi3 (UDWtype, UDWtype);
313 extern DWtype __moddi3 (DWtype, DWtype);
315 /* __udivmoddi4 is static inline when building other libgcc2 portions. */
316 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
317 !defined (L_umoddi3) && !defined (L_moddi3))
318 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
321 /* __negdi2 is static inline when building other libgcc2 portions. */
322 #if !defined(L_divdi3) && !defined(L_moddi3)
323 extern DWtype __negdi2 (DWtype);
326 extern DWtype __lshrdi3 (DWtype, shift_count_type);
327 extern DWtype __ashldi3 (DWtype, shift_count_type);
328 extern DWtype __ashrdi3 (DWtype, shift_count_type);
330 /* __udiv_w_sdiv is static inline when building other libgcc2 portions. */
331 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \
332 !defined(L_umoddi3) && !defined(L_moddi3))
333 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
336 extern cmp_return_type __cmpdi2 (DWtype, DWtype);
337 extern cmp_return_type __ucmpdi2 (DWtype, DWtype);
339 #if MIN_UNITS_PER_WORD > 1
340 extern SItype __bswapsi2 (SItype);
342 #if __SIZEOF_LONG_LONG__ > 4
343 extern DItype __bswapdi2 (DItype);
346 extern Wtype __absvSI2 (Wtype);
347 extern Wtype __addvSI3 (Wtype, Wtype);
348 extern Wtype __subvSI3 (Wtype, Wtype);
349 extern Wtype __mulvSI3 (Wtype, Wtype);
350 extern Wtype __negvSI2 (Wtype);
351 extern DWtype __absvDI2 (DWtype);
352 extern DWtype __addvDI3 (DWtype, DWtype);
353 extern DWtype __subvDI3 (DWtype, DWtype);
354 extern DWtype __mulvDI3 (DWtype, DWtype);
355 extern DWtype __negvDI2 (DWtype);
357 #ifdef COMPAT_SIMODE_TRAPPING_ARITHMETIC
358 extern SItype __absvsi2 (SItype);
359 extern SItype __addvsi3 (SItype, SItype);
360 extern SItype __subvsi3 (SItype, SItype);
361 extern SItype __mulvsi3 (SItype, SItype);
362 extern SItype __negvsi2 (SItype);
363 #endif /* COMPAT_SIMODE_TRAPPING_ARITHMETIC */
366 #if LIBGCC2_HAS_SF_MODE
367 extern DWtype __fixsfdi (SFtype);
368 extern SFtype __floatdisf (DWtype);
369 extern SFtype __floatundisf (UDWtype);
370 extern UWtype __fixunssfSI (SFtype);
371 extern UDWtype __fixunssfDI (SFtype);
372 extern SFtype __powisf2 (SFtype, int);
373 extern SCtype __divsc3 (SFtype, SFtype, SFtype, SFtype);
374 extern SCtype __mulsc3 (SFtype, SFtype, SFtype, SFtype);
376 #if LIBGCC2_HAS_DF_MODE
377 extern DWtype __fixdfdi (DFtype);
378 extern DFtype __floatdidf (DWtype);
379 extern DFtype __floatundidf (UDWtype);
380 extern UWtype __fixunsdfSI (DFtype);
381 extern UDWtype __fixunsdfDI (DFtype);
382 extern DFtype __powidf2 (DFtype, int);
383 extern DCtype __divdc3 (DFtype, DFtype, DFtype, DFtype);
384 extern DCtype __muldc3 (DFtype, DFtype, DFtype, DFtype);
387 #if LIBGCC2_HAS_XF_MODE
388 extern DWtype __fixxfdi (XFtype);
389 extern UDWtype __fixunsxfDI (XFtype);
390 extern XFtype __floatdixf (DWtype);
391 extern XFtype __floatundixf (UDWtype);
392 extern UWtype __fixunsxfSI (XFtype);
393 extern XFtype __powixf2 (XFtype, int);
394 extern XCtype __divxc3 (XFtype, XFtype, XFtype, XFtype);
395 extern XCtype __mulxc3 (XFtype, XFtype, XFtype, XFtype);
398 #if LIBGCC2_HAS_TF_MODE
399 extern UDWtype __fixunstfDI (TFtype);
400 extern DWtype __fixtfdi (TFtype);
401 extern TFtype __floatditf (DWtype);
402 extern TFtype __floatunditf (UDWtype);
403 extern TFtype __powitf2 (TFtype, int);
404 extern TCtype __divtc3 (TFtype, TFtype, TFtype, TFtype);
405 extern TCtype __multc3 (TFtype, TFtype, TFtype, TFtype);
407 #define int bogus_type
409 /* DWstructs are pairs of Wtype values in the order determined by
410 LIBGCC2_WORDS_BIG_ENDIAN. */
412 #if LIBGCC2_WORDS_BIG_ENDIAN
413 struct DWstruct {Wtype high, low;};
415 struct DWstruct {Wtype low, high;};
418 /* We need this union to unpack/pack DImode values, since we don't have
419 any arithmetic yet. Incoming DImode parameters are stored into the
420 `ll' field, and the unpacked result is read from the struct `s'. */
428 /* Defined for L_popcount_tab. Exported here because some targets may
429 want to use it for their own versions of the __popcount builtins. */
430 extern const UQItype __popcount_tab[256];
432 /* Defined for L_clz. Exported here because some targets may want to use
433 it for their own versions of the __clz builtins. It contains the bit
434 position of the first set bit for the numbers 0 - 255. This avoids the
435 need for a separate table for the __ctz builtins. */
436 extern const UQItype __clz_tab[256];
438 #include "longlong.h"
441 extern int __clzDI2 (UDWtype);
442 extern int __clzSI2 (UWtype);
443 extern int __ctzSI2 (UWtype);
444 extern int __ffsSI2 (UWtype);
445 extern int __ffsDI2 (DWtype);
446 extern int __ctzDI2 (UDWtype);
447 extern int __popcountSI2 (UWtype);
448 extern int __popcountDI2 (UDWtype);
449 extern int __paritySI2 (UWtype);
450 extern int __parityDI2 (UDWtype);
451 #define int bogus_type
453 extern void __enable_execute_stack (void *);
456 #pragma GCC visibility pop
459 #endif /* ! GCC_LIBGCC2_H */