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 #ifndef __LIBGCC2_H__
  23 #define __LIBGCC2_H__
  24
  25 extern int __gcc_bcmp (const unsigned char *, const unsigned char *, size_t);
  26 extern void *__builtin_saveregs (void);
  27 extern void __dummy (void);
  28 extern void __clear_cache (char *, char *);
  29 extern void __pure_virtual (void) __attribute__ ((__noreturn__));
  30 extern void __terminate (void) __attribute__ ((__noreturn__));
  31 extern void __default_terminate (void) __attribute__ ((__noreturn__));
  32 extern void *__throw_type_match (void *, void *, void *);
  33 extern void __empty (void);
  34 extern void *__get_eh_context (void);
  35 extern void **__get_eh_info (void);
  36 extern void ***__get_dynamic_handler_chain (void);
  37 extern int __eh_rtime_match (void *);
  38 extern void __unwinding_cleanup (void);
  39 extern void __rethrow (void *);
  40 extern void __throw (void);
  41 extern void __sjthrow (void) __attribute__ ((__noreturn__));
  42 extern void __sjpopnthrow (void) __attribute__ ((__noreturn__));
  43 extern void __eprintf (const char *, const char *, unsigned int, const char *)
  44   __attribute__ ((__noreturn__));
  45
  46 struct bb;
  47 extern void __bb_exit_func (void);
  48 extern void __bb_init_func (struct bb *);
  49 extern void __bb_fork_func (void);
  50 extern void __bb_trace_func (void);
  51 extern void __bb_trace_ret (void);
  52 extern void __bb_init_trace_func (struct bb *, unsigned long);
  53
  54 struct exception_descriptor;
  55 extern short int __get_eh_table_language (struct exception_descriptor *);
  56 extern short int __get_eh_table_version (struct exception_descriptor *);
  57
  58 /* Permit the tm.h file to select the endianness to use just for this
  59    file.  This is used when the endianness is determined when the
  60    compiler is run.  */
  61
  62 #ifndef LIBGCC2_WORDS_BIG_ENDIAN
  63 #define LIBGCC2_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
  64 #endif
  65
  66 #ifndef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
  67 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE LONG_DOUBLE_TYPE_SIZE
  68 #endif
  69
  70 #ifndef MIN_UNITS_PER_WORD
  71 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
  72 #endif
  73
  74 /* In the first part of this file, we are interfacing to calls generated
  75    by the compiler itself.  These calls pass values into these routines
  76    which have very specific modes (rather than very specific types), and
  77    these compiler-generated calls also expect any return values to have
  78    very specific modes (rather than very specific types).  Thus, we need
  79    to avoid using regular C language type names in this part of the file
  80    because the sizes for those types can be configured to be anything.
  81    Instead we use the following special type names.  */
  82
  83 typedef          int QItype     __attribute__ ((mode (QI)));
  84 typedef unsigned int UQItype    __attribute__ ((mode (QI)));
  85 typedef          int HItype     __attribute__ ((mode (HI)));
  86 typedef unsigned int UHItype    __attribute__ ((mode (HI)));
  87 #if MIN_UNITS_PER_WORD > 1
  88 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1 */
  89 typedef          int SItype     __attribute__ ((mode (SI)));
  90 typedef unsigned int USItype    __attribute__ ((mode (SI)));
  91 #if MIN_UNITS_PER_WORD > 2
  92 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2 */
  93 typedef          int DItype     __attribute__ ((mode (DI)));
  94 typedef unsigned int UDItype    __attribute__ ((mode (DI)));
  95 #if MIN_UNITS_PER_WORD > 4
  96 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4 */
  97 typedef          int TItype     __attribute__ ((mode (TI)));
  98 typedef unsigned int UTItype    __attribute__ ((mode (TI)));
  99 #endif
 100 #endif
 101 #endif
 102
 103 #if BITS_PER_UNIT == 8
 104
 105 typedef         float SFtype    __attribute__ ((mode (SF)));
 106 typedef         float DFtype    __attribute__ ((mode (DF)));
 107
 108 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
 109 typedef         float XFtype    __attribute__ ((mode (XF)));
 110 #endif
 111 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
 112 typedef         float TFtype    __attribute__ ((mode (TF)));
 113 #endif
 114
 115 #else /* BITS_PER_UNIT != 8 */
 116
 117 /* On dsp's there are usually qf/hf/tqf modes used instead of the above.
 118    For now we don't support them in libgcc2.c.  */
 119
 120 #undef L_fixdfdi
 121 #undef L_fixsfdi
 122 #undef L_fixtfdi
 123 #undef L_fixunsdfdi
 124 #undef L_fixunsdfsi
 125 #undef L_fixunssfdi
 126 #undef L_fixunssfsi
 127 #undef L_fixunstfdi
 128 #undef L_fixunsxfdi
 129 #undef L_fixunsxfsi
 130 #undef L_fixxfdi
 131 #undef L_floatdidf
 132 #undef L_floatdisf
 133 #undef L_floatditf
 134 #undef L_floatdixf
 135
 136 #endif /* BITS_PER_UNIT != 8 */
 137
 138 typedef int word_type __attribute__ ((mode (__word__)));
 139
 140 /* Make sure that we don't accidentally use any normal C language built-in
 141    type names in the first part of this file.  Instead we want to use *only*
 142    the type names defined above.  The following macro definitions insure
 143    that if we *do* accidentally use some normal C language built-in type name,
 144    we will get a syntax error.  */
 145
 146 #define char bogus_type
 147 #define short bogus_type
 148 #define int bogus_type
 149 #define long bogus_type
 150 #define unsigned bogus_type
 151 #define float bogus_type
 152 #define double bogus_type
 153
 154 #if MIN_UNITS_PER_WORD > 4
 155 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
 156 #define Wtype   DItype
 157 #define UWtype  UDItype
 158 #define HWtype  DItype
 159 #define UHWtype UDItype
 160 #define DWtype  TItype
 161 #define UDWtype UTItype
 162 #define __NW(a,b)       __ ## a ## di ## b
 163 #define __NDW(a,b)      __ ## a ## ti ## b
 164 #elif MIN_UNITS_PER_WORD > 2
 165 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 166 #define Wtype   SItype
 167 #define UWtype  USItype
 168 #define HWtype  SItype
 169 #define UHWtype USItype
 170 #define DWtype  DItype
 171 #define UDWtype UDItype
 172 #define __NW(a,b)       __ ## a ## si ## b
 173 #define __NDW(a,b)      __ ## a ## di ## b
 174 #elif MIN_UNITS_PER_WORD > 1
 175 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 176 #define Wtype   HItype
 177 #define UWtype  UHItype
 178 #define HWtype  HItype
 179 #define UHWtype UHItype
 180 #define DWtype  SItype
 181 #define UDWtype USItype
 182 #define __NW(a,b)       __ ## a ## hi ## b
 183 #define __NDW(a,b)      __ ## a ## si ## b
 184 #else
 185 #define W_TYPE_SIZE BITS_PER_UNIT
 186 #define Wtype   QItype
 187 #define UWtype  UQItype
 188 #define HWtype  QItype
 189 #define UHWtype UQItype
 190 #define DWtype  HItype
 191 #define UDWtype UHItype
 192 #define __NW(a,b)       __ ## a ## qi ## b
 193 #define __NDW(a,b)      __ ## a ## hi ## b
 194 #endif
 195
 196 #define __muldi3        __NDW(mul,3)
 197 #define __divdi3        __NDW(div,3)
 198 #define __udivdi3       __NDW(udiv,3)
 199 #define __moddi3        __NDW(mod,3)
 200 #define __umoddi3       __NDW(umod,3)
 201 #define __negdi2        __NDW(neg,2)
 202 #define __lshrdi3       __NDW(lshr,3)
 203 #define __ashldi3       __NDW(ashl,3)
 204 #define __ashrdi3       __NDW(ashr,3)
 205 #define __ffsdi2        __NDW(ffs,2)
 206 #define __cmpdi2        __NDW(cmp,2)
 207 #define __ucmpdi2       __NDW(ucmp,2)
 208 #define __udivmoddi4    __NDW(udivmod,4)
 209 #define __fixunstfDI    __NDW(fixunstf,)
 210 #define __fixtfdi       __NDW(fixtf,)
 211 #define __fixunsxfDI    __NDW(fixunsxf,)
 212 #define __fixxfdi       __NDW(fixxf,)
 213 #define __fixunsdfDI    __NDW(fixunsdf,)
 214 #define __fixdfdi       __NDW(fixdf,)
 215 #define __fixunssfDI    __NDW(fixunssf,)
 216 #define __fixsfdi       __NDW(fixsf,)
 217 #define __floatdixf     __NDW(float,xf)
 218 #define __floatditf     __NDW(float,tf)
 219 #define __floatdidf     __NDW(float,df)
 220 #define __floatdisf     __NDW(float,sf)
 221 #define __fixunsxfSI    __NW(fixunsxf,)
 222 #define __fixunstfSI    __NW(fixunstf,)
 223 #define __fixunsdfSI    __NW(fixunsdf,)
 224 #define __fixunssfSI    __NW(fixunssf,)
 225
 226 extern DWtype __muldi3 (DWtype, DWtype);
 227 extern DWtype __divdi3 (DWtype, DWtype);
 228 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 229 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 230 extern DWtype __moddi3 (DWtype, DWtype);
 231
 232 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 233 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 234      !defined (L_umoddi3) && !defined (L_moddi3))
 235 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 236 #endif
 237
 238 /* __negdi2 is static inline when building other libgcc2 portions.  */
 239 #if !defined(L_divdi3) && !defined(L_moddi3)
 240 extern DWtype __negdi2 (DWtype);
 241 #endif
 242
 243 extern DWtype __lshrdi3 (DWtype, word_type);
 244 extern DWtype __ashldi3 (DWtype, word_type);
 245 extern DWtype __ashrdi3 (DWtype, word_type);
 246 extern DWtype __ffsdi2 (DWtype);
 247
 248 /* __udiv_w_sdiv is static inline when building other libgcc2 portions.  */
 249 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \
 250      !defined(L_umoddi3) && !defined(L_moddi3))
 251 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 252 #endif
 253
 254 extern word_type __cmpdi2 (DWtype, DWtype);
 255 extern word_type __ucmpdi2 (DWtype, DWtype);
 256
 257 #if BITS_PER_UNIT == 8
 258 extern DWtype __fixdfdi (DFtype);
 259 extern DWtype __fixsfdi (SFtype);
 260 extern DFtype __floatdidf (DWtype);
 261 extern SFtype __floatdisf (DWtype);
 262 extern UWtype __fixunsdfSI (DFtype);
 263 extern UWtype __fixunssfSI (SFtype);
 264 extern DWtype __fixunsdfDI (DFtype);
 265 extern DWtype __fixunssfDI (SFtype);
 266
 267 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
 268 extern DWtype __fixxfdi (XFtype);
 269 extern DWtype __fixunsxfDI (XFtype);
 270 extern XFtype __floatdixf (DWtype);
 271 extern UWtype __fixunsxfSI (XFtype);
 272 #endif
 273
 274 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
 275 extern DWtype __fixunstfDI (TFtype);
 276 extern DWtype __fixtfdi (TFtype);
 277 extern TFtype __floatditf (DWtype);
 278 #endif
 279 #endif /* BITS_PER_UNIT == 8 */
 280
 281 /* DWstructs are pairs of Wtype values in the order determined by
 282    LIBGCC2_WORDS_BIG_ENDIAN.  */
 283
 284 #if LIBGCC2_WORDS_BIG_ENDIAN
 285   struct DWstruct {Wtype high, low;};
 286 #else
 287   struct DWstruct {Wtype low, high;};
 288 #endif
 289
 290 /* We need this union to unpack/pack DImode values, since we don't have
 291    any arithmetic yet.  Incoming DImode parameters are stored into the
 292    `ll' field, and the unpacked result is read from the struct `s'.  */
 293
 294 typedef union
 295 {
 296   struct DWstruct s;
 297   DWtype ll;
 298 } DWunion;
 299
 300 #if (defined (L_udivmoddi4) || defined (L_muldi3) || defined (L_udiv_w_sdiv)\
 301      || defined (L_divdi3) || defined (L_udivdi3) \
 302      || defined (L_moddi3) || defined (L_umoddi3))
 303
 304 #include "longlong.h"
 305
 306 #endif /* udiv or mul */
 307
 308 #endif /* __LIBGCC2_H__ */