gcc/libgcc2.h

   1 /* Header file for libgcc2.c.  */
   2 /* Copyright (C) 2000, 2001
   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 typedef void (*__terminate_func_ptr)(void) __attribute__ ((__noreturn__));
  26
  27 extern int __gcc_bcmp (const unsigned char *, const unsigned char *, size_t);
  28 extern void __clear_cache (char *, char *);
  29 extern void __pure_virtual (void) __attribute__ ((__noreturn__));
  30 extern void __terminate (void) __attribute__ ((__noreturn__));
  31 extern __terminate_func_ptr __terminate_set_func (__terminate_func_ptr);
  32 extern void __default_terminate (void) __attribute__ ((__noreturn__));
  33 extern void *__throw_type_match (void *, void *, 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 extern void *__eh_alloc (size_t);
  46 extern void __eh_free (void *);
  47
  48 struct bb;
  49 extern void __bb_exit_func (void);
  50 extern void __bb_init_func (struct bb *);
  51 extern void __bb_fork_func (void);
  52 extern void __bb_trace_func (void);
  53 extern void __bb_trace_ret (void);
  54 extern void __bb_init_trace_func (struct bb *, unsigned long);
  55
  56 struct exception_descriptor;
  57 extern short int __get_eh_table_language (struct exception_descriptor *);
  58 extern short int __get_eh_table_version (struct exception_descriptor *);
  59
  60 /* Permit the tm.h file to select the endianness to use just for this
  61    file.  This is used when the endianness is determined when the
  62    compiler is run.  */
  63
  64 #ifndef LIBGCC2_WORDS_BIG_ENDIAN
  65 #define LIBGCC2_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
  66 #endif
  67
  68 #ifndef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
  69 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE LONG_DOUBLE_TYPE_SIZE
  70 #endif
  71
  72 #ifndef MIN_UNITS_PER_WORD
  73 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
  74 #endif
  75
  76 /* In the first part of this file, we are interfacing to calls generated
  77    by the compiler itself.  These calls pass values into these routines
  78    which have very specific modes (rather than very specific types), and
  79    these compiler-generated calls also expect any return values to have
  80    very specific modes (rather than very specific types).  Thus, we need
  81    to avoid using regular C language type names in this part of the file
  82    because the sizes for those types can be configured to be anything.
  83    Instead we use the following special type names.  */
  84
  85 typedef          int QItype     __attribute__ ((mode (QI)));
  86 typedef unsigned int UQItype    __attribute__ ((mode (QI)));
  87 typedef          int HItype     __attribute__ ((mode (HI)));
  88 typedef unsigned int UHItype    __attribute__ ((mode (HI)));
  89 #if MIN_UNITS_PER_WORD > 1
  90 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1 */
  91 typedef          int SItype     __attribute__ ((mode (SI)));
  92 typedef unsigned int USItype    __attribute__ ((mode (SI)));
  93 #if LONG_LONG_TYPE_SIZE > 32
  94 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2 */
  95 typedef          int DItype     __attribute__ ((mode (DI)));
  96 typedef unsigned int UDItype    __attribute__ ((mode (DI)));
  97 /* We cannot represent a TItype constant on a machine with 32-bit
  98    HOST_WIDE_INTs, so it doesn't make sense to define these types.  */
  99 #if MIN_UNITS_PER_WORD > 4 && HOST_BITS_PER_WIDE_INT >= 64
 100 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4 */
 101 typedef          int TItype     __attribute__ ((mode (TI)));
 102 typedef unsigned int UTItype    __attribute__ ((mode (TI)));
 103 #endif
 104 #endif
 105 #endif
 106
 107 #if BITS_PER_UNIT == 8
 108
 109 typedef         float SFtype    __attribute__ ((mode (SF)));
 110 typedef         float DFtype    __attribute__ ((mode (DF)));
 111
 112 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
 113 typedef         float XFtype    __attribute__ ((mode (XF)));
 114 #endif
 115 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
 116 typedef         float TFtype    __attribute__ ((mode (TF)));
 117 #endif
 118
 119 #else /* BITS_PER_UNIT != 8 */
 120
 121 /* On dsp's there are usually qf/hf/tqf modes used instead of the above.
 122    For now we don't support them in libgcc2.c.  */
 123
 124 #undef L_fixdfdi
 125 #undef L_fixsfdi
 126 #undef L_fixtfdi
 127 #undef L_fixunsdfdi
 128 #undef L_fixunsdfsi
 129 #undef L_fixunssfdi
 130 #undef L_fixunssfsi
 131 #undef L_fixunstfdi
 132 #undef L_fixunsxfdi
 133 #undef L_fixunsxfsi
 134 #undef L_fixxfdi
 135 #undef L_floatdidf
 136 #undef L_floatdisf
 137 #undef L_floatditf
 138 #undef L_floatdixf
 139
 140 #endif /* BITS_PER_UNIT != 8 */
 141
 142 typedef int word_type __attribute__ ((mode (__word__)));
 143
 144 /* Make sure that we don't accidentally use any normal C language built-in
 145    type names in the first part of this file.  Instead we want to use *only*
 146    the type names defined above.  The following macro definitions insure
 147    that if we *do* accidentally use some normal C language built-in type name,
 148    we will get a syntax error.  */
 149
 150 #define char bogus_type
 151 #define short bogus_type
 152 #define int bogus_type
 153 #define long bogus_type
 154 #define unsigned bogus_type
 155 #define float bogus_type
 156 #define double bogus_type
 157
 158 /* We can only support a Wtype that fits within a HOST_WIDE_INT.  Otherwise,
 159    DWtype overflows the tree and RTL types.  */
 160 #if MIN_UNITS_PER_WORD > 4 && HOST_BITS_PER_WIDE_INT >= 64
 161 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
 162 #define Wtype   DItype
 163 #define UWtype  UDItype
 164 #define HWtype  DItype
 165 #define UHWtype UDItype
 166 #define DWtype  TItype
 167 #define UDWtype UTItype
 168 #define __NW(a,b)       __ ## a ## di ## b
 169 #define __NDW(a,b)      __ ## a ## ti ## b
 170 #elif MIN_UNITS_PER_WORD > 2 \
 171       || (MIN_UNITS_PER_WORD > 1 && LONG_LONG_TYPE_SIZE > 32)
 172 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 173 #define Wtype   SItype
 174 #define UWtype  USItype
 175 #define HWtype  SItype
 176 #define UHWtype USItype
 177 #define DWtype  DItype
 178 #define UDWtype UDItype
 179 #define __NW(a,b)       __ ## a ## si ## b
 180 #define __NDW(a,b)      __ ## a ## di ## b
 181 #elif MIN_UNITS_PER_WORD > 1
 182 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 183 #define Wtype   HItype
 184 #define UWtype  UHItype
 185 #define HWtype  HItype
 186 #define UHWtype UHItype
 187 #define DWtype  SItype
 188 #define UDWtype USItype
 189 #define __NW(a,b)       __ ## a ## hi ## b
 190 #define __NDW(a,b)      __ ## a ## si ## b
 191 #else
 192 #define W_TYPE_SIZE BITS_PER_UNIT
 193 #define Wtype   QItype
 194 #define UWtype  UQItype
 195 #define HWtype  QItype
 196 #define UHWtype UQItype
 197 #define DWtype  HItype
 198 #define UDWtype UHItype
 199 #define __NW(a,b)       __ ## a ## qi ## b
 200 #define __NDW(a,b)      __ ## a ## hi ## b
 201 #endif
 202
 203 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
 204 #define Wtype_MIN (- Wtype_MAX - 1)
 205
 206 #define __muldi3        __NDW(mul,3)
 207 #define __divdi3        __NDW(div,3)
 208 #define __udivdi3       __NDW(udiv,3)
 209 #define __moddi3        __NDW(mod,3)
 210 #define __umoddi3       __NDW(umod,3)
 211 #define __negdi2        __NDW(neg,2)
 212 #define __lshrdi3       __NDW(lshr,3)
 213 #define __ashldi3       __NDW(ashl,3)
 214 #define __ashrdi3       __NDW(ashr,3)
 215 #define __ffsdi2        __NDW(ffs,2)
 216 #define __cmpdi2        __NDW(cmp,2)
 217 #define __ucmpdi2       __NDW(ucmp,2)
 218 #define __udivmoddi4    __NDW(udivmod,4)
 219 #define __fixunstfDI    __NDW(fixunstf,)
 220 #define __fixtfdi       __NDW(fixtf,)
 221 #define __fixunsxfDI    __NDW(fixunsxf,)
 222 #define __fixxfdi       __NDW(fixxf,)
 223 #define __fixunsdfDI    __NDW(fixunsdf,)
 224 #define __fixdfdi       __NDW(fixdf,)
 225 #define __fixunssfDI    __NDW(fixunssf,)
 226 #define __fixsfdi       __NDW(fixsf,)
 227 #define __floatdixf     __NDW(float,xf)
 228 #define __floatditf     __NDW(float,tf)
 229 #define __floatdidf     __NDW(float,df)
 230 #define __floatdisf     __NDW(float,sf)
 231 #define __fixunsxfSI    __NW(fixunsxf,)
 232 #define __fixunstfSI    __NW(fixunstf,)
 233 #define __fixunsdfSI    __NW(fixunsdf,)
 234 #define __fixunssfSI    __NW(fixunssf,)
 235
 236 extern DWtype __muldi3 (DWtype, DWtype);
 237 extern DWtype __divdi3 (DWtype, DWtype);
 238 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 239 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 240 extern DWtype __moddi3 (DWtype, DWtype);
 241
 242 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 243 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 244      !defined (L_umoddi3) && !defined (L_moddi3))
 245 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 246 #endif
 247
 248 /* __negdi2 is static inline when building other libgcc2 portions.  */
 249 #if !defined(L_divdi3) && !defined(L_moddi3)
 250 extern DWtype __negdi2 (DWtype);
 251 #endif
 252
 253 extern DWtype __lshrdi3 (DWtype, word_type);
 254 extern DWtype __ashldi3 (DWtype, word_type);
 255 extern DWtype __ashrdi3 (DWtype, word_type);
 256 extern DWtype __ffsdi2 (DWtype);
 257
 258 /* __udiv_w_sdiv is static inline when building other libgcc2 portions.  */
 259 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \
 260      !defined(L_umoddi3) && !defined(L_moddi3))
 261 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 262 #endif
 263
 264 extern word_type __cmpdi2 (DWtype, DWtype);
 265 extern word_type __ucmpdi2 (DWtype, DWtype);
 266
 267 extern Wtype __absvsi2 (Wtype);
 268 extern DWtype __absvdi2 (DWtype);
 269 extern Wtype __addvsi3 (Wtype, Wtype);
 270 extern DWtype __addvdi3 (DWtype, DWtype);
 271 extern Wtype __subvsi3 (Wtype, Wtype);
 272 extern DWtype __subvdi3 (DWtype, DWtype);
 273 extern Wtype __mulvsi3 (Wtype, Wtype);
 274 extern DWtype __mulvdi3 (DWtype, DWtype);
 275 extern Wtype __negvsi2 (Wtype);
 276 extern DWtype __negvdi2 (DWtype);
 277
 278 #if BITS_PER_UNIT == 8
 279 extern DWtype __fixdfdi (DFtype);
 280 extern DWtype __fixsfdi (SFtype);
 281 extern DFtype __floatdidf (DWtype);
 282 extern SFtype __floatdisf (DWtype);
 283 extern UWtype __fixunsdfSI (DFtype);
 284 extern UWtype __fixunssfSI (SFtype);
 285 extern DWtype __fixunsdfDI (DFtype);
 286 extern DWtype __fixunssfDI (SFtype);
 287
 288 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
 289 extern DWtype __fixxfdi (XFtype);
 290 extern DWtype __fixunsxfDI (XFtype);
 291 extern XFtype __floatdixf (DWtype);
 292 extern UWtype __fixunsxfSI (XFtype);
 293 #endif
 294
 295 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
 296 extern DWtype __fixunstfDI (TFtype);
 297 extern DWtype __fixtfdi (TFtype);
 298 extern TFtype __floatditf (DWtype);
 299 #endif
 300 #endif /* BITS_PER_UNIT == 8 */
 301
 302 /* DWstructs are pairs of Wtype values in the order determined by
 303    LIBGCC2_WORDS_BIG_ENDIAN.  */
 304
 305 #if LIBGCC2_WORDS_BIG_ENDIAN
 306   struct DWstruct {Wtype high, low;};
 307 #else
 308   struct DWstruct {Wtype low, high;};
 309 #endif
 310
 311 /* We need this union to unpack/pack DImode values, since we don't have
 312    any arithmetic yet.  Incoming DImode parameters are stored into the
 313    `ll' field, and the unpacked result is read from the struct `s'.  */
 314
 315 typedef union
 316 {
 317   struct DWstruct s;
 318   DWtype ll;
 319 } DWunion;
 320
 321 #include "longlong.h"
 322
 323 #endif /* __LIBGCC2_H__ */