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 GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 02111-1307, USA.  */
  21
  22 #ifndef GCC_LIBGCC2_H
  23 #define GCC_LIBGCC2_H
  24
  25 extern int __gcc_bcmp (const unsigned char *, const unsigned char *, size_t);
  26 extern void __clear_cache (char *, char *);
  27 extern void __eprintf (const char *, const char *, unsigned int, const char *)
  28   __attribute__ ((__noreturn__));
  29
  30 struct bb;
  31 extern void __bb_exit_func (void);
  32 extern void __bb_init_func (struct bb *);
  33 extern void __bb_fork_func (void);
  34
  35 #if LONG_TYPE_SIZE == GCOV_TYPE_SIZE
  36 typedef long gcov_type;
  37 #else
  38 typedef long long gcov_type;
  39 #endif
  40
  41 extern gcov_type *__bb_find_arc_counters (void);
  42
  43 struct exception_descriptor;
  44 extern short int __get_eh_table_language (struct exception_descriptor *);
  45 extern short int __get_eh_table_version (struct exception_descriptor *);
  46
  47 /* Permit the tm.h file to select the endianness to use just for this
  48    file.  This is used when the endianness is determined when the
  49    compiler is run.  */
  50
  51 #ifndef LIBGCC2_WORDS_BIG_ENDIAN
  52 #define LIBGCC2_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
  53 #endif
  54
  55 #ifndef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
  56 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE LONG_DOUBLE_TYPE_SIZE
  57 #endif
  58
  59 #ifndef MIN_UNITS_PER_WORD
  60 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
  61 #endif
  62
  63 /* In the first part of this file, we are interfacing to calls generated
  64    by the compiler itself.  These calls pass values into these routines
  65    which have very specific modes (rather than very specific types), and
  66    these compiler-generated calls also expect any return values to have
  67    very specific modes (rather than very specific types).  Thus, we need
  68    to avoid using regular C language type names in this part of the file
  69    because the sizes for those types can be configured to be anything.
  70    Instead we use the following special type names.  */
  71
  72 typedef          int QItype     __attribute__ ((mode (QI)));
  73 typedef unsigned int UQItype    __attribute__ ((mode (QI)));
  74 typedef          int HItype     __attribute__ ((mode (HI)));
  75 typedef unsigned int UHItype    __attribute__ ((mode (HI)));
  76 #if MIN_UNITS_PER_WORD > 1
  77 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1 */
  78 typedef          int SItype     __attribute__ ((mode (SI)));
  79 typedef unsigned int USItype    __attribute__ ((mode (SI)));
  80 #if LONG_LONG_TYPE_SIZE > 32
  81 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2 */
  82 typedef          int DItype     __attribute__ ((mode (DI)));
  83 typedef unsigned int UDItype    __attribute__ ((mode (DI)));
  84 #if MIN_UNITS_PER_WORD > 4
  85 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4 */
  86 typedef          int TItype     __attribute__ ((mode (TI)));
  87 typedef unsigned int UTItype    __attribute__ ((mode (TI)));
  88 #endif
  89 #endif
  90 #endif
  91
  92 #if BITS_PER_UNIT == 8
  93
  94 typedef         float SFtype    __attribute__ ((mode (SF)));
  95 typedef         float DFtype    __attribute__ ((mode (DF)));
  96
  97 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
  98 typedef         float XFtype    __attribute__ ((mode (XF)));
  99 #endif
 100 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
 101 typedef         float TFtype    __attribute__ ((mode (TF)));
 102 #endif
 103
 104 #else /* BITS_PER_UNIT != 8 */
 105
 106 /* On dsp's there are usually qf/hf/tqf modes used instead of the above.
 107    For now we don't support them in libgcc2.c.  */
 108
 109 #undef L_fixdfdi
 110 #undef L_fixsfdi
 111 #undef L_fixtfdi
 112 #undef L_fixunsdfdi
 113 #undef L_fixunsdfsi
 114 #undef L_fixunssfdi
 115 #undef L_fixunssfsi
 116 #undef L_fixunstfdi
 117 #undef L_fixunsxfdi
 118 #undef L_fixunsxfsi
 119 #undef L_fixxfdi
 120 #undef L_floatdidf
 121 #undef L_floatdisf
 122 #undef L_floatditf
 123 #undef L_floatdixf
 124
 125 #endif /* BITS_PER_UNIT != 8 */
 126
 127 typedef int word_type __attribute__ ((mode (__word__)));
 128
 129 /* Make sure that we don't accidentally use any normal C language built-in
 130    type names in the first part of this file.  Instead we want to use *only*
 131    the type names defined above.  The following macro definitions insure
 132    that if we *do* accidentally use some normal C language built-in type name,
 133    we will get a syntax error.  */
 134
 135 #define char bogus_type
 136 #define short bogus_type
 137 #define int bogus_type
 138 #define long bogus_type
 139 #define unsigned bogus_type
 140 #define float bogus_type
 141 #define double bogus_type
 142
 143 #if MIN_UNITS_PER_WORD > 4
 144 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
 145 #define Wtype   DItype
 146 #define UWtype  UDItype
 147 #define HWtype  DItype
 148 #define UHWtype UDItype
 149 #define DWtype  TItype
 150 #define UDWtype UTItype
 151 #define __NW(a,b)       __ ## a ## di ## b
 152 #define __NDW(a,b)      __ ## a ## ti ## b
 153 #elif MIN_UNITS_PER_WORD > 2 \
 154       || (MIN_UNITS_PER_WORD > 1 && LONG_LONG_TYPE_SIZE > 32)
 155 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 156 #define Wtype   SItype
 157 #define UWtype  USItype
 158 #define HWtype  SItype
 159 #define UHWtype USItype
 160 #define DWtype  DItype
 161 #define UDWtype UDItype
 162 #define __NW(a,b)       __ ## a ## si ## b
 163 #define __NDW(a,b)      __ ## a ## di ## b
 164 #elif MIN_UNITS_PER_WORD > 1
 165 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 166 #define Wtype   HItype
 167 #define UWtype  UHItype
 168 #define HWtype  HItype
 169 #define UHWtype UHItype
 170 #define DWtype  SItype
 171 #define UDWtype USItype
 172 #define __NW(a,b)       __ ## a ## hi ## b
 173 #define __NDW(a,b)      __ ## a ## si ## b
 174 #else
 175 #define W_TYPE_SIZE BITS_PER_UNIT
 176 #define Wtype   QItype
 177 #define UWtype  UQItype
 178 #define HWtype  QItype
 179 #define UHWtype UQItype
 180 #define DWtype  HItype
 181 #define UDWtype UHItype
 182 #define __NW(a,b)       __ ## a ## qi ## b
 183 #define __NDW(a,b)      __ ## a ## hi ## b
 184 #endif
 185
 186 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
 187 #define Wtype_MIN (- Wtype_MAX - 1)
 188
 189 #define __muldi3        __NDW(mul,3)
 190 #define __divdi3        __NDW(div,3)
 191 #define __udivdi3       __NDW(udiv,3)
 192 #define __moddi3        __NDW(mod,3)
 193 #define __umoddi3       __NDW(umod,3)
 194 #define __negdi2        __NDW(neg,2)
 195 #define __lshrdi3       __NDW(lshr,3)
 196 #define __ashldi3       __NDW(ashl,3)
 197 #define __ashrdi3       __NDW(ashr,3)
 198 #define __ffsdi2        __NDW(ffs,2)
 199 #define __cmpdi2        __NDW(cmp,2)
 200 #define __ucmpdi2       __NDW(ucmp,2)
 201 #define __udivmoddi4    __NDW(udivmod,4)
 202 #define __fixunstfDI    __NDW(fixunstf,)
 203 #define __fixtfdi       __NDW(fixtf,)
 204 #define __fixunsxfDI    __NDW(fixunsxf,)
 205 #define __fixxfdi       __NDW(fixxf,)
 206 #define __fixunsdfDI    __NDW(fixunsdf,)
 207 #define __fixdfdi       __NDW(fixdf,)
 208 #define __fixunssfDI    __NDW(fixunssf,)
 209 #define __fixsfdi       __NDW(fixsf,)
 210 #define __floatdixf     __NDW(float,xf)
 211 #define __floatditf     __NDW(float,tf)
 212 #define __floatdidf     __NDW(float,df)
 213 #define __floatdisf     __NDW(float,sf)
 214 #define __fixunsxfSI    __NW(fixunsxf,)
 215 #define __fixunstfSI    __NW(fixunstf,)
 216 #define __fixunsdfSI    __NW(fixunsdf,)
 217 #define __fixunssfSI    __NW(fixunssf,)
 218
 219 extern DWtype __muldi3 (DWtype, DWtype);
 220 extern DWtype __divdi3 (DWtype, DWtype);
 221 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 222 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 223 extern DWtype __moddi3 (DWtype, DWtype);
 224
 225 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 226 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 227      !defined (L_umoddi3) && !defined (L_moddi3))
 228 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 229 #endif
 230
 231 /* __negdi2 is static inline when building other libgcc2 portions.  */
 232 #if !defined(L_divdi3) && !defined(L_moddi3)
 233 extern DWtype __negdi2 (DWtype);
 234 #endif
 235
 236 extern DWtype __lshrdi3 (DWtype, word_type);
 237 extern DWtype __ashldi3 (DWtype, word_type);
 238 extern DWtype __ashrdi3 (DWtype, word_type);
 239 extern DWtype __ffsdi2 (DWtype);
 240
 241 /* __udiv_w_sdiv 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 UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 245 #endif
 246
 247 extern word_type __cmpdi2 (DWtype, DWtype);
 248 extern word_type __ucmpdi2 (DWtype, DWtype);
 249
 250 extern Wtype __absvsi2 (Wtype);
 251 extern DWtype __absvdi2 (DWtype);
 252 extern Wtype __addvsi3 (Wtype, Wtype);
 253 extern DWtype __addvdi3 (DWtype, DWtype);
 254 extern Wtype __subvsi3 (Wtype, Wtype);
 255 extern DWtype __subvdi3 (DWtype, DWtype);
 256 extern Wtype __mulvsi3 (Wtype, Wtype);
 257 extern DWtype __mulvdi3 (DWtype, DWtype);
 258 extern Wtype __negvsi2 (Wtype);
 259 extern DWtype __negvdi2 (DWtype);
 260
 261 #if BITS_PER_UNIT == 8
 262 extern DWtype __fixdfdi (DFtype);
 263 extern DWtype __fixsfdi (SFtype);
 264 extern DFtype __floatdidf (DWtype);
 265 extern SFtype __floatdisf (DWtype);
 266 extern UWtype __fixunsdfSI (DFtype);
 267 extern UWtype __fixunssfSI (SFtype);
 268 extern DWtype __fixunsdfDI (DFtype);
 269 extern DWtype __fixunssfDI (SFtype);
 270
 271 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
 272 extern DWtype __fixxfdi (XFtype);
 273 extern DWtype __fixunsxfDI (XFtype);
 274 extern XFtype __floatdixf (DWtype);
 275 extern UWtype __fixunsxfSI (XFtype);
 276 #endif
 277
 278 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
 279 extern DWtype __fixunstfDI (TFtype);
 280 extern DWtype __fixtfdi (TFtype);
 281 extern TFtype __floatditf (DWtype);
 282 #endif
 283 #endif /* BITS_PER_UNIT == 8 */
 284
 285 /* DWstructs are pairs of Wtype values in the order determined by
 286    LIBGCC2_WORDS_BIG_ENDIAN.  */
 287
 288 #if LIBGCC2_WORDS_BIG_ENDIAN
 289   struct DWstruct {Wtype high, low;};
 290 #else
 291   struct DWstruct {Wtype low, high;};
 292 #endif
 293
 294 /* We need this union to unpack/pack DImode values, since we don't have
 295    any arithmetic yet.  Incoming DImode parameters are stored into the
 296    `ll' field, and the unpacked result is read from the struct `s'.  */
 297
 298 typedef union
 299 {
 300   struct DWstruct s;
 301   DWtype ll;
 302 } DWunion;
 303
 304 #include "longlong.h"
 305
 306 #endif /* ! GCC_LIBGCC2_H */