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 exception_descriptor;
  31 extern short int __get_eh_table_language (struct exception_descriptor *);
  32 extern short int __get_eh_table_version (struct exception_descriptor *);
  33
  34 /* Permit the tm.h file to select the endianness to use just for this
  35    file.  This is used when the endianness is determined when the
  36    compiler is run.  */
  37
  38 #ifndef LIBGCC2_WORDS_BIG_ENDIAN
  39 #define LIBGCC2_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
  40 #endif
  41
  42 #ifndef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
  43 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE LONG_DOUBLE_TYPE_SIZE
  44 #endif
  45
  46 #ifndef MIN_UNITS_PER_WORD
  47 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
  48 #endif
  49
  50 /* In the first part of this file, we are interfacing to calls generated
  51    by the compiler itself.  These calls pass values into these routines
  52    which have very specific modes (rather than very specific types), and
  53    these compiler-generated calls also expect any return values to have
  54    very specific modes (rather than very specific types).  Thus, we need
  55    to avoid using regular C language type names in this part of the file
  56    because the sizes for those types can be configured to be anything.
  57    Instead we use the following special type names.  */
  58
  59 typedef          int QItype     __attribute__ ((mode (QI)));
  60 typedef unsigned int UQItype    __attribute__ ((mode (QI)));
  61 typedef          int HItype     __attribute__ ((mode (HI)));
  62 typedef unsigned int UHItype    __attribute__ ((mode (HI)));
  63 #if MIN_UNITS_PER_WORD > 1
  64 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1 */
  65 typedef          int SItype     __attribute__ ((mode (SI)));
  66 typedef unsigned int USItype    __attribute__ ((mode (SI)));
  67 #if LONG_LONG_TYPE_SIZE > 32
  68 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2 */
  69 typedef          int DItype     __attribute__ ((mode (DI)));
  70 typedef unsigned int UDItype    __attribute__ ((mode (DI)));
  71 #if MIN_UNITS_PER_WORD > 4
  72 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4 */
  73 typedef          int TItype     __attribute__ ((mode (TI)));
  74 typedef unsigned int UTItype    __attribute__ ((mode (TI)));
  75 #endif
  76 #endif
  77 #endif
  78
  79 #if BITS_PER_UNIT == 8
  80
  81 typedef         float SFtype    __attribute__ ((mode (SF)));
  82 typedef         float DFtype    __attribute__ ((mode (DF)));
  83
  84 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
  85 typedef         float XFtype    __attribute__ ((mode (XF)));
  86 #endif
  87 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
  88 typedef         float TFtype    __attribute__ ((mode (TF)));
  89 #endif
  90
  91 #else /* BITS_PER_UNIT != 8 */
  92
  93 /* On dsp's there are usually qf/hf/tqf modes used instead of the above.
  94    For now we don't support them in libgcc2.c.  */
  95
  96 #undef L_fixdfdi
  97 #undef L_fixsfdi
  98 #undef L_fixtfdi
  99 #undef L_fixunsdfdi
 100 #undef L_fixunsdfsi
 101 #undef L_fixunssfdi
 102 #undef L_fixunssfsi
 103 #undef L_fixunstfdi
 104 #undef L_fixunsxfdi
 105 #undef L_fixunsxfsi
 106 #undef L_fixxfdi
 107 #undef L_floatdidf
 108 #undef L_floatdisf
 109 #undef L_floatditf
 110 #undef L_floatdixf
 111
 112 #endif /* BITS_PER_UNIT != 8 */
 113
 114 typedef int word_type __attribute__ ((mode (__word__)));
 115
 116 /* Make sure that we don't accidentally use any normal C language built-in
 117    type names in the first part of this file.  Instead we want to use *only*
 118    the type names defined above.  The following macro definitions insure
 119    that if we *do* accidentally use some normal C language built-in type name,
 120    we will get a syntax error.  */
 121
 122 #define char bogus_type
 123 #define short bogus_type
 124 #define int bogus_type
 125 #define long bogus_type
 126 #define unsigned bogus_type
 127 #define float bogus_type
 128 #define double bogus_type
 129
 130 #if MIN_UNITS_PER_WORD > 4
 131 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
 132 #define Wtype   DItype
 133 #define UWtype  UDItype
 134 #define HWtype  DItype
 135 #define UHWtype UDItype
 136 #define DWtype  TItype
 137 #define UDWtype UTItype
 138 #define __NW(a,b)       __ ## a ## di ## b
 139 #define __NDW(a,b)      __ ## a ## ti ## b
 140 #elif MIN_UNITS_PER_WORD > 2 \
 141       || (MIN_UNITS_PER_WORD > 1 && LONG_LONG_TYPE_SIZE > 32)
 142 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 143 #define Wtype   SItype
 144 #define UWtype  USItype
 145 #define HWtype  SItype
 146 #define UHWtype USItype
 147 #define DWtype  DItype
 148 #define UDWtype UDItype
 149 #define __NW(a,b)       __ ## a ## si ## b
 150 #define __NDW(a,b)      __ ## a ## di ## b
 151 #elif MIN_UNITS_PER_WORD > 1
 152 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 153 #define Wtype   HItype
 154 #define UWtype  UHItype
 155 #define HWtype  HItype
 156 #define UHWtype UHItype
 157 #define DWtype  SItype
 158 #define UDWtype USItype
 159 #define __NW(a,b)       __ ## a ## hi ## b
 160 #define __NDW(a,b)      __ ## a ## si ## b
 161 #else
 162 #define W_TYPE_SIZE BITS_PER_UNIT
 163 #define Wtype   QItype
 164 #define UWtype  UQItype
 165 #define HWtype  QItype
 166 #define UHWtype UQItype
 167 #define DWtype  HItype
 168 #define UDWtype UHItype
 169 #define __NW(a,b)       __ ## a ## qi ## b
 170 #define __NDW(a,b)      __ ## a ## hi ## b
 171 #endif
 172
 173 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
 174 #define Wtype_MIN (- Wtype_MAX - 1)
 175
 176 #define __muldi3        __NDW(mul,3)
 177 #define __divdi3        __NDW(div,3)
 178 #define __udivdi3       __NDW(udiv,3)
 179 #define __moddi3        __NDW(mod,3)
 180 #define __umoddi3       __NDW(umod,3)
 181 #define __negdi2        __NDW(neg,2)
 182 #define __lshrdi3       __NDW(lshr,3)
 183 #define __ashldi3       __NDW(ashl,3)
 184 #define __ashrdi3       __NDW(ashr,3)
 185 #define __ffsdi2        __NDW(ffs,2)
 186 #define __cmpdi2        __NDW(cmp,2)
 187 #define __ucmpdi2       __NDW(ucmp,2)
 188 #define __udivmoddi4    __NDW(udivmod,4)
 189 #define __fixunstfDI    __NDW(fixunstf,)
 190 #define __fixtfdi       __NDW(fixtf,)
 191 #define __fixunsxfDI    __NDW(fixunsxf,)
 192 #define __fixxfdi       __NDW(fixxf,)
 193 #define __fixunsdfDI    __NDW(fixunsdf,)
 194 #define __fixdfdi       __NDW(fixdf,)
 195 #define __fixunssfDI    __NDW(fixunssf,)
 196 #define __fixsfdi       __NDW(fixsf,)
 197 #define __floatdixf     __NDW(float,xf)
 198 #define __floatditf     __NDW(float,tf)
 199 #define __floatdidf     __NDW(float,df)
 200 #define __floatdisf     __NDW(float,sf)
 201 #define __fixunsxfSI    __NW(fixunsxf,)
 202 #define __fixunstfSI    __NW(fixunstf,)
 203 #define __fixunsdfSI    __NW(fixunsdf,)
 204 #define __fixunssfSI    __NW(fixunssf,)
 205
 206 extern DWtype __muldi3 (DWtype, DWtype);
 207 extern DWtype __divdi3 (DWtype, DWtype);
 208 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 209 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 210 extern DWtype __moddi3 (DWtype, DWtype);
 211
 212 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 213 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 214      !defined (L_umoddi3) && !defined (L_moddi3))
 215 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 216 #endif
 217
 218 /* __negdi2 is static inline when building other libgcc2 portions.  */
 219 #if !defined(L_divdi3) && !defined(L_moddi3)
 220 extern DWtype __negdi2 (DWtype);
 221 #endif
 222
 223 extern DWtype __lshrdi3 (DWtype, word_type);
 224 extern DWtype __ashldi3 (DWtype, word_type);
 225 extern DWtype __ashrdi3 (DWtype, word_type);
 226
 227 /* ??? Ought to get these named properly for DSPs.  */
 228 #if BITS_PER_UNIT != 8 || MIN_UNITS_PER_WORD < 4
 229 # undef L_clzsi2
 230 # undef L_ctzsi2
 231 # undef L_popcountsi2
 232 # undef L_paritysi2
 233 # if LONG_LONG_TYPE_SIZE <= 32
 234 #  undef L_clzdi2
 235 #  undef L_ctzdi2
 236 #  undef L_popcountdi2
 237 #  undef L_paritydi2
 238 # endif
 239 #endif
 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 */