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 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 MIN_UNITS_PER_WORD > 2
  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 #if MIN_UNITS_PER_WORD > 4
  98 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4 */
  99 typedef          int TItype     __attribute__ ((mode (TI)));
 100 typedef unsigned int UTItype    __attribute__ ((mode (TI)));
 101 #endif
 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 > 4
 157 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
 158 #define Wtype   DItype
 159 #define UWtype  UDItype
 160 #define HWtype  DItype
 161 #define UHWtype UDItype
 162 #define DWtype  TItype
 163 #define UDWtype UTItype
 164 #define __NW(a,b)       __ ## a ## di ## b
 165 #define __NDW(a,b)      __ ## a ## ti ## b
 166 #elif MIN_UNITS_PER_WORD > 2
 167 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 168 #define Wtype   SItype
 169 #define UWtype  USItype
 170 #define HWtype  SItype
 171 #define UHWtype USItype
 172 #define DWtype  DItype
 173 #define UDWtype UDItype
 174 #define __NW(a,b)       __ ## a ## si ## b
 175 #define __NDW(a,b)      __ ## a ## di ## b
 176 #elif MIN_UNITS_PER_WORD > 1
 177 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 178 #define Wtype   HItype
 179 #define UWtype  UHItype
 180 #define HWtype  HItype
 181 #define UHWtype UHItype
 182 #define DWtype  SItype
 183 #define UDWtype USItype
 184 #define __NW(a,b)       __ ## a ## hi ## b
 185 #define __NDW(a,b)      __ ## a ## si ## b
 186 #else
 187 #define W_TYPE_SIZE BITS_PER_UNIT
 188 #define Wtype   QItype
 189 #define UWtype  UQItype
 190 #define HWtype  QItype
 191 #define UHWtype UQItype
 192 #define DWtype  HItype
 193 #define UDWtype UHItype
 194 #define __NW(a,b)       __ ## a ## qi ## b
 195 #define __NDW(a,b)      __ ## a ## hi ## b
 196 #endif
 197
 198 #define __muldi3        __NDW(mul,3)
 199 #define __divdi3        __NDW(div,3)
 200 #define __udivdi3       __NDW(udiv,3)
 201 #define __moddi3        __NDW(mod,3)
 202 #define __umoddi3       __NDW(umod,3)
 203 #define __negdi2        __NDW(neg,2)
 204 #define __lshrdi3       __NDW(lshr,3)
 205 #define __ashldi3       __NDW(ashl,3)
 206 #define __ashrdi3       __NDW(ashr,3)
 207 #define __ffsdi2        __NDW(ffs,2)
 208 #define __cmpdi2        __NDW(cmp,2)
 209 #define __ucmpdi2       __NDW(ucmp,2)
 210 #define __udivmoddi4    __NDW(udivmod,4)
 211 #define __fixunstfDI    __NDW(fixunstf,)
 212 #define __fixtfdi       __NDW(fixtf,)
 213 #define __fixunsxfDI    __NDW(fixunsxf,)
 214 #define __fixxfdi       __NDW(fixxf,)
 215 #define __fixunsdfDI    __NDW(fixunsdf,)
 216 #define __fixdfdi       __NDW(fixdf,)
 217 #define __fixunssfDI    __NDW(fixunssf,)
 218 #define __fixsfdi       __NDW(fixsf,)
 219 #define __floatdixf     __NDW(float,xf)
 220 #define __floatditf     __NDW(float,tf)
 221 #define __floatdidf     __NDW(float,df)
 222 #define __floatdisf     __NDW(float,sf)
 223 #define __fixunsxfSI    __NW(fixunsxf,)
 224 #define __fixunstfSI    __NW(fixunstf,)
 225 #define __fixunsdfSI    __NW(fixunsdf,)
 226 #define __fixunssfSI    __NW(fixunssf,)
 227
 228 extern DWtype __muldi3 (DWtype, DWtype);
 229 extern DWtype __divdi3 (DWtype, DWtype);
 230 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 231 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 232 extern DWtype __moddi3 (DWtype, DWtype);
 233
 234 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 235 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 236      !defined (L_umoddi3) && !defined (L_moddi3))
 237 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 238 #endif
 239
 240 /* __negdi2 is static inline when building other libgcc2 portions.  */
 241 #if !defined(L_divdi3) && !defined(L_moddi3)
 242 extern DWtype __negdi2 (DWtype);
 243 #endif
 244
 245 extern DWtype __lshrdi3 (DWtype, word_type);
 246 extern DWtype __ashldi3 (DWtype, word_type);
 247 extern DWtype __ashrdi3 (DWtype, word_type);
 248 extern DWtype __ffsdi2 (DWtype);
 249
 250 /* __udiv_w_sdiv is static inline when building other libgcc2 portions.  */
 251 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \
 252      !defined(L_umoddi3) && !defined(L_moddi3))
 253 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 254 #endif
 255
 256 extern word_type __cmpdi2 (DWtype, DWtype);
 257 extern word_type __ucmpdi2 (DWtype, DWtype);
 258
 259 #if BITS_PER_UNIT == 8
 260 extern DWtype __fixdfdi (DFtype);
 261 extern DWtype __fixsfdi (SFtype);
 262 extern DFtype __floatdidf (DWtype);
 263 extern SFtype __floatdisf (DWtype);
 264 extern UWtype __fixunsdfSI (DFtype);
 265 extern UWtype __fixunssfSI (SFtype);
 266 extern DWtype __fixunsdfDI (DFtype);
 267 extern DWtype __fixunssfDI (SFtype);
 268
 269 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
 270 extern DWtype __fixxfdi (XFtype);
 271 extern DWtype __fixunsxfDI (XFtype);
 272 extern XFtype __floatdixf (DWtype);
 273 extern UWtype __fixunsxfSI (XFtype);
 274 #endif
 275
 276 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
 277 extern DWtype __fixunstfDI (TFtype);
 278 extern DWtype __fixtfdi (TFtype);
 279 extern TFtype __floatditf (DWtype);
 280 #endif
 281 #endif /* BITS_PER_UNIT == 8 */
 282
 283 /* DWstructs are pairs of Wtype values in the order determined by
 284    LIBGCC2_WORDS_BIG_ENDIAN.  */
 285
 286 #if LIBGCC2_WORDS_BIG_ENDIAN
 287   struct DWstruct {Wtype high, low;};
 288 #else
 289   struct DWstruct {Wtype low, high;};
 290 #endif
 291
 292 /* We need this union to unpack/pack DImode values, since we don't have
 293    any arithmetic yet.  Incoming DImode parameters are stored into the
 294    `ll' field, and the unpacked result is read from the struct `s'.  */
 295
 296 typedef union
 297 {
 298   struct DWstruct s;
 299   DWtype ll;
 300 } DWunion;
 301
 302 #if (defined (L_udivmoddi4) || defined (L_muldi3) || defined (L_udiv_w_sdiv)\
 303      || defined (L_divdi3) || defined (L_udivdi3) \
 304      || defined (L_moddi3) || defined (L_umoddi3))
 305
 306 #include "longlong.h"
 307
 308 #endif /* udiv or mul */
 309
 310 #endif /* __LIBGCC2_H__ */