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[official-gcc.git] / gcc / libgcc2.h
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1 /* Header file for libgcc2.c. */
2 /* Copyright (C) 2000, 2001, 2004, 2005
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 2, or (at your option) any later
10 version.
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.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
20 02110-1301, USA. */
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. */
30 #ifndef GCC_LIBGCC2_H
31 #define GCC_LIBGCC2_H
33 #ifndef HIDE_EXPORTS
34 #pragma GCC visibility push(default)
35 #endif
37 extern int __gcc_bcmp (const unsigned char *, const unsigned char *, size_t);
38 extern void __clear_cache (char *, char *);
39 extern void __eprintf (const char *, const char *, unsigned int, const char *)
40 __attribute__ ((__noreturn__));
42 struct exception_descriptor;
43 extern short int __get_eh_table_language (struct exception_descriptor *);
44 extern short int __get_eh_table_version (struct exception_descriptor *);
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. */
50 #ifndef LIBGCC2_WORDS_BIG_ENDIAN
51 #define LIBGCC2_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
52 #endif
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
61 #ifndef LIBGCC2_HAS_SF_MODE
62 #define LIBGCC2_HAS_SF_MODE (BITS_PER_UNIT == 8)
63 #endif
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
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
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
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
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
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
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
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
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. */
137 typedef int QItype __attribute__ ((mode (QI)));
138 typedef unsigned int UQItype __attribute__ ((mode (QI)));
139 typedef int HItype __attribute__ ((mode (HI)));
140 typedef 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. */
143 typedef int SItype __attribute__ ((mode (SI)));
144 typedef 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. */
147 typedef int DItype __attribute__ ((mode (DI)));
148 typedef 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. */
151 typedef int TItype __attribute__ ((mode (TI)));
152 typedef unsigned int UTItype __attribute__ ((mode (TI)));
153 #endif
154 #endif
155 #endif
157 #if LIBGCC2_HAS_SF_MODE
158 typedef float SFtype __attribute__ ((mode (SF)));
159 typedef _Complex float SCtype __attribute__ ((mode (SC)));
160 #endif
161 #if LIBGCC2_HAS_DF_MODE
162 typedef float DFtype __attribute__ ((mode (DF)));
163 typedef _Complex float DCtype __attribute__ ((mode (DC)));
164 #endif
165 #if LIBGCC2_HAS_XF_MODE
166 typedef float XFtype __attribute__ ((mode (XF)));
167 typedef _Complex float XCtype __attribute__ ((mode (XC)));
168 #endif
169 #if LIBGCC2_HAS_TF_MODE
170 typedef float TFtype __attribute__ ((mode (TF)));
171 typedef _Complex float TCtype __attribute__ ((mode (TC)));
172 #endif
174 typedef int word_type __attribute__ ((mode (__word__)));
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. */
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
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. */
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
243 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
244 #define Wtype_MIN (- Wtype_MAX - 1)
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
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,)
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)
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)
313 extern DWtype __muldi3 (DWtype, DWtype);
314 extern DWtype __divdi3 (DWtype, DWtype);
315 extern UDWtype __udivdi3 (UDWtype, UDWtype);
316 extern UDWtype __umoddi3 (UDWtype, UDWtype);
317 extern DWtype __moddi3 (DWtype, DWtype);
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))
322 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
323 #endif
325 /* __negdi2 is static inline when building other libgcc2 portions. */
326 #if !defined(L_divdi3) && !defined(L_moddi3)
327 extern DWtype __negdi2 (DWtype);
328 #endif
330 extern DWtype __lshrdi3 (DWtype, word_type);
331 extern DWtype __ashldi3 (DWtype, word_type);
332 extern DWtype __ashrdi3 (DWtype, word_type);
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))
337 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
338 #endif
340 extern word_type __cmpdi2 (DWtype, DWtype);
341 extern word_type __ucmpdi2 (DWtype, DWtype);
343 extern Wtype __absvSI2 (Wtype);
344 extern Wtype __addvSI3 (Wtype, Wtype);
345 extern Wtype __subvSI3 (Wtype, Wtype);
346 extern Wtype __mulvSI3 (Wtype, Wtype);
347 extern Wtype __negvSI2 (Wtype);
348 extern UWtype __bswapsi2 (UWtype);
349 extern DWtype __absvDI2 (DWtype);
350 extern DWtype __addvDI3 (DWtype, DWtype);
351 extern DWtype __subvDI3 (DWtype, DWtype);
352 extern DWtype __mulvDI3 (DWtype, DWtype);
353 extern DWtype __negvDI2 (DWtype);
354 extern UDWtype __bswapdi2 (UDWtype);
356 #ifdef COMPAT_SIMODE_TRAPPING_ARITHMETIC
357 extern SItype __absvsi2 (SItype);
358 extern SItype __addvsi3 (SItype, SItype);
359 extern SItype __subvsi3 (SItype, SItype);
360 extern SItype __mulvsi3 (SItype, SItype);
361 extern SItype __negvsi2 (SItype);
362 #endif /* COMPAT_SIMODE_TRAPPING_ARITHMETIC */
364 #undef int
365 #if LIBGCC2_HAS_SF_MODE
366 extern DWtype __fixsfdi (SFtype);
367 extern SFtype __floatdisf (DWtype);
368 extern SFtype __floatundisf (UDWtype);
369 extern UWtype __fixunssfSI (SFtype);
370 extern DWtype __fixunssfDI (SFtype);
371 extern SFtype __powisf2 (SFtype, int);
372 extern SCtype __divsc3 (SFtype, SFtype, SFtype, SFtype);
373 extern SCtype __mulsc3 (SFtype, SFtype, SFtype, SFtype);
374 #endif
375 #if LIBGCC2_HAS_DF_MODE
376 extern DWtype __fixdfdi (DFtype);
377 extern DFtype __floatdidf (DWtype);
378 extern DFtype __floatundidf (UDWtype);
379 extern UWtype __fixunsdfSI (DFtype);
380 extern DWtype __fixunsdfDI (DFtype);
381 extern DFtype __powidf2 (DFtype, int);
382 extern DCtype __divdc3 (DFtype, DFtype, DFtype, DFtype);
383 extern DCtype __muldc3 (DFtype, DFtype, DFtype, DFtype);
384 #endif
386 #if LIBGCC2_HAS_XF_MODE
387 extern DWtype __fixxfdi (XFtype);
388 extern DWtype __fixunsxfDI (XFtype);
389 extern XFtype __floatdixf (DWtype);
390 extern XFtype __floatundixf (UDWtype);
391 extern UWtype __fixunsxfSI (XFtype);
392 extern XFtype __powixf2 (XFtype, int);
393 extern XCtype __divxc3 (XFtype, XFtype, XFtype, XFtype);
394 extern XCtype __mulxc3 (XFtype, XFtype, XFtype, XFtype);
395 #endif
397 #if LIBGCC2_HAS_TF_MODE
398 extern DWtype __fixunstfDI (TFtype);
399 extern DWtype __fixtfdi (TFtype);
400 extern TFtype __floatditf (DWtype);
401 extern TFtype __floatunditf (UDWtype);
402 extern TFtype __powitf2 (TFtype, int);
403 extern TCtype __divtc3 (TFtype, TFtype, TFtype, TFtype);
404 extern TCtype __multc3 (TFtype, TFtype, TFtype, TFtype);
405 #endif
406 #define int bogus_type
408 /* DWstructs are pairs of Wtype values in the order determined by
409 LIBGCC2_WORDS_BIG_ENDIAN. */
411 #if LIBGCC2_WORDS_BIG_ENDIAN
412 struct DWstruct {Wtype high, low;};
413 #else
414 struct DWstruct {Wtype low, high;};
415 #endif
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'. */
421 typedef union
423 struct DWstruct s;
424 DWtype ll;
425 } DWunion;
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. */
429 extern const UQItype __popcount_tab[256];
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. */
435 extern const UQItype __clz_tab[256];
437 #include "longlong.h"
439 #undef int
440 extern int __clzDI2 (UDWtype);
441 extern int __clzSI2 (UWtype);
442 extern int __ctzSI2 (UWtype);
443 extern int __ffsSI2 (UWtype);
444 extern int __ffsDI2 (DWtype);
445 extern int __ctzDI2 (UDWtype);
446 extern int __popcountSI2 (UWtype);
447 extern int __popcountDI2 (UDWtype);
448 extern int __paritySI2 (UWtype);
449 extern int __parityDI2 (UDWtype);
450 #define int bogus_type
452 extern void __enable_execute_stack (void *);
454 #ifndef HIDE_EXPORTS
455 #pragma GCC visibility pop
456 #endif
458 #endif /* ! GCC_LIBGCC2_H */