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