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