gcc/libgcc2.h

   1 /* Header file for libgcc2.c.  */
   2 /* Copyright (C) 2000
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  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.  */
  28
  29 #ifndef __LIBGCC2_H__
  30 #define __LIBGCC2_H__
  31
  32 extern int __gcc_bcmp (const unsigned char *, const unsigned char *, size_t);
  33 extern void *__builtin_saveregs (void);
  34 extern void __dummy (void);
  35 extern void __clear_cache (char *, char *);
  36 extern void __pure_virtual (void) __attribute__ ((__noreturn__));
  37 extern void __terminate (void) __attribute__ ((__noreturn__));
  38 extern void __default_terminate (void) __attribute__ ((__noreturn__));
  39 extern void *__throw_type_match (void *, void *, void *);
  40 extern void __empty (void);
  41 extern void *__get_eh_context (void);
  42 extern void **__get_eh_info (void);
  43 extern void ***__get_dynamic_handler_chain (void);
  44 extern int __eh_rtime_match (void *);
  45 extern void __unwinding_cleanup (void);
  46 extern void __rethrow (void *);
  47 extern void __throw (void);
  48 extern void __sjthrow (void) __attribute__ ((__noreturn__));
  49 extern void __sjpopnthrow (void) __attribute__ ((__noreturn__));
  50 extern void __eprintf (const char *, const char *, unsigned int, const char *)
  51   __attribute__ ((__noreturn__));
  52
  53 struct bb;
  54 extern void __bb_exit_func (void);
  55 extern void __bb_init_func (struct bb *);
  56 extern void __bb_fork_func (void);
  57 extern void __bb_trace_func (void);
  58 extern void __bb_trace_ret (void);
  59 extern void __bb_init_trace_func (struct bb *, unsigned long);
  60
  61 struct exception_descriptor;
  62 extern short int __get_eh_table_language (struct exception_descriptor *);
  63 extern short int __get_eh_table_version (struct exception_descriptor *);
  64
  65 /* Permit the tm.h file to select the endianness to use just for this
  66    file.  This is used when the endianness is determined when the
  67    compiler is run.  */
  68
  69 #ifndef LIBGCC2_WORDS_BIG_ENDIAN
  70 #define LIBGCC2_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
  71 #endif
  72
  73 #ifndef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
  74 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE LONG_DOUBLE_TYPE_SIZE
  75 #endif
  76
  77 #ifndef MIN_UNITS_PER_WORD
  78 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
  79 #endif
  80
  81 /* In the first part of this file, we are interfacing to calls generated
  82    by the compiler itself.  These calls pass values into these routines
  83    which have very specific modes (rather than very specific types), and
  84    these compiler-generated calls also expect any return values to have
  85    very specific modes (rather than very specific types).  Thus, we need
  86    to avoid using regular C language type names in this part of the file
  87    because the sizes for those types can be configured to be anything.
  88    Instead we use the following special type names.  */
  89
  90 typedef          int QItype     __attribute__ ((mode (QI)));
  91 typedef unsigned int UQItype    __attribute__ ((mode (QI)));
  92 typedef          int HItype     __attribute__ ((mode (HI)));
  93 typedef unsigned int UHItype    __attribute__ ((mode (HI)));
  94 #if MIN_UNITS_PER_WORD > 1
  95 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1 */
  96 typedef          int SItype     __attribute__ ((mode (SI)));
  97 typedef unsigned int USItype    __attribute__ ((mode (SI)));
  98 #if MIN_UNITS_PER_WORD > 2
  99 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2 */
 100 typedef          int DItype     __attribute__ ((mode (DI)));
 101 typedef unsigned int UDItype    __attribute__ ((mode (DI)));
 102 #endif
 103 #endif
 104
 105 #if BITS_PER_UNIT == 8
 106
 107 typedef         float SFtype    __attribute__ ((mode (SF)));
 108 typedef         float DFtype    __attribute__ ((mode (DF)));
 109
 110 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
 111 typedef         float XFtype    __attribute__ ((mode (XF)));
 112 #endif
 113 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
 114 typedef         float TFtype    __attribute__ ((mode (TF)));
 115 #endif
 116
 117 #else /* BITS_PER_UNIT != 8 */
 118
 119 /* On dsp's there are usually qf/hf/tqf modes used instead of the above.
 120    For now we don't support them in libgcc2.c.  */
 121
 122 #undef L_fixdfdi
 123 #undef L_fixsfdi
 124 #undef L_fixtfdi
 125 #undef L_fixunsdfdi
 126 #undef L_fixunsdfsi
 127 #undef L_fixunssfdi
 128 #undef L_fixunssfsi
 129 #undef L_fixunstfdi
 130 #undef L_fixunsxfdi
 131 #undef L_fixunsxfsi
 132 #undef L_fixxfdi
 133 #undef L_floatdidf
 134 #undef L_floatdisf
 135 #undef L_floatditf
 136 #undef L_floatdixf
 137
 138 #endif /* BITS_PER_UNIT != 8 */
 139
 140 typedef int word_type __attribute__ ((mode (__word__)));
 141
 142 /* Make sure that we don't accidentally use any normal C language built-in
 143    type names in the first part of this file.  Instead we want to use *only*
 144    the type names defined above.  The following macro definitions insure
 145    that if we *do* accidentally use some normal C language built-in type name,
 146    we will get a syntax error.  */
 147
 148 #define char bogus_type
 149 #define short bogus_type
 150 #define int bogus_type
 151 #define long bogus_type
 152 #define unsigned bogus_type
 153 #define float bogus_type
 154 #define double bogus_type
 155
 156 #if MIN_UNITS_PER_WORD > 2
 157 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 158 #define Wtype   SItype
 159 #define UWtype  USItype
 160 #define HWtype  SItype
 161 #define UHWtype USItype
 162 #define DWtype  DItype
 163 #define UDWtype UDItype
 164 #define __NW(a,b)       __ ## a ## si ## b
 165 #define __NDW(a,b)      __ ## a ## di ## b
 166 #elif MIN_UNITS_PER_WORD > 1
 167 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 168 #define Wtype   HItype
 169 #define UWtype  UHItype
 170 #define HWtype  HItype
 171 #define UHWtype UHItype
 172 #define DWtype  SItype
 173 #define UDWtype USItype
 174 #define __NW(a,b)       __ ## a ## hi ## b
 175 #define __NDW(a,b)      __ ## a ## si ## b
 176 #else
 177 #define W_TYPE_SIZE BITS_PER_UNIT
 178 #define Wtype   QItype
 179 #define UWtype  UQItype
 180 #define HWtype  QItype
 181 #define UHWtype UQItype
 182 #define DWtype  HItype
 183 #define UDWtype UHItype
 184 #define __NW(a,b)       __ ## a ## qi ## b
 185 #define __NDW(a,b)      __ ## a ## hi ## b
 186 #endif
 187
 188 extern DWtype __muldi3 (DWtype, DWtype);
 189 extern DWtype __divdi3 (DWtype, DWtype);
 190 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 191 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 192 extern DWtype __moddi3 (DWtype, DWtype);
 193 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 194 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 195      !defined (L_umoddi3) && !defined (L_moddi3))
 196 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 197 #endif
 198
 199 /* __negdi2 is static inline when building other libgcc2 portions.  */
 200 #if !defined(L_divdi3) && !defined(L_moddi3)
 201 extern DWtype __negdi2 (DWtype);
 202 #endif
 203
 204 extern DWtype __lshrdi3 (DWtype, word_type);
 205 extern DWtype __ashldi3 (DWtype, word_type);
 206 extern DWtype __ashrdi3 (DWtype, word_type);
 207 extern DWtype __ffsdi2 (DWtype);
 208
 209 /* __udiv_w_sdiv is static inline when building other libgcc2 portions.  */
 210 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \
 211      !defined(L_umoddi3) && !defined(L_moddi3))
 212 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 213 #endif
 214
 215 extern word_type __cmpdi2 (DWtype, DWtype);
 216 extern word_type __ucmpdi2 (DWtype, DWtype);
 217
 218 #if BITS_PER_UNIT == 8
 219 extern DWtype __fixdfdi (DFtype);
 220 extern DWtype __fixsfdi (SFtype);
 221 extern DFtype __floatdidf (DWtype);
 222 extern SFtype __floatdisf (DWtype);
 223 extern UWtype __fixunsdfsi (DFtype);
 224 extern UWtype __fixunssfsi (SFtype);
 225 extern DWtype __fixunsdfdi (DFtype);
 226 extern DWtype __fixunssfdi (SFtype);
 227
 228 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
 229 extern DWtype __fixxfdi (XFtype);
 230 extern DWtype __fixunsxfdi (XFtype);
 231 extern XFtype __floatdixf (DWtype);
 232 extern UWtype __fixunsxfsi (XFtype);
 233 #endif
 234
 235 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
 236 extern DWtype __fixunstfdi (TFtype);
 237 extern DWtype __fixtfdi (TFtype);
 238 extern TFtype __floatditf (DWtype);
 239 #endif
 240 #endif /* BITS_PER_UNIT == 8 */
 241
 242 #define __muldi3        __NDW(mul,3)
 243 #define __divdi3        __NDW(div,3)
 244 #define __udivdi3       __NDW(udiv,3)
 245 #define __moddi3        __NDW(mod,3)
 246 #define __umoddi3       __NDW(umod,3)
 247 #define __negdi2        __NDW(neg,2)
 248 #define __lshrdi3       __NDW(lshr,3)
 249 #define __ashldi3       __NDW(ashl,3)
 250 #define __ashrdi3       __NDW(ashr,3)
 251 #define __ffsdi2        __NDW(ffs,2)
 252 #define __cmpdi2        __NDW(cmp,2)
 253 #define __ucmpdi2       __NDW(ucmp,2)
 254 #define __udivmoddi4    __NDW(udivmod,4)
 255 #define __fixunstfdi    __NDW(fixunstf,)
 256 #define __fixtfdi       __NDW(fixtf,)
 257 #define __fixunsxfdi    __NDW(fixunsxf,)
 258 #define __fixxfdi       __NDW(fixxf,)
 259 #define __fixunsdfdi    __NDW(fixunsdf,)
 260 #define __fixdfdi       __NDW(fixdf,)
 261 #define __fixunssfdi    __NDW(fixunssf,)
 262 #define __fixsfdi       __NDW(fixsf,)
 263 #define __floatdixf     __NDW(float,xf)
 264 #define __floatditf     __NDW(float,tf)
 265 #define __floatdidf     __NDW(float,df)
 266 #define __floatdisf     __NDW(float,sf)
 267 #define __fixunsxfsi    __NW(fixunsxf,)
 268 #define __fixunstfsi    __NW(fixunstf,)
 269 #define __fixunsdfsi    __NW(fixunsdf,)
 270 #define __fixunssfsi    __NW(fixunssf,)
 271
 272 /* DWstructs are pairs of Wtype values in the order determined by
 273    LIBGCC2_WORDS_BIG_ENDIAN.  */
 274
 275 #if LIBGCC2_WORDS_BIG_ENDIAN
 276   struct DWstruct {Wtype high, low;};
 277 #else
 278   struct DWstruct {Wtype low, high;};
 279 #endif
 280
 281 /* We need this union to unpack/pack DImode values, since we don't have
 282    any arithmetic yet.  Incoming DImode parameters are stored into the
 283    `ll' field, and the unpacked result is read from the struct `s'.  */
 284
 285 typedef union
 286 {
 287   struct DWstruct s;
 288   DWtype ll;
 289 } DWunion;
 290
 291 #if (defined (L_udivmoddi4) || defined (L_muldi3) || defined (L_udiv_w_sdiv)\
 292      || defined (L_divdi3) || defined (L_udivdi3) \
 293      || defined (L_moddi3) || defined (L_umoddi3))
 294
 295 #include "longlong.h"
 296
 297 #endif /* udiv or mul */
 298
 299 #endif /* __LIBGCC2_H__ */