contrib/gcc-3.4/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 /* As a special exception, if you link this library with other files,
  23    some of which are compiled with GCC, to produce an executable,
  24    this library does not by itself cause the resulting executable
  25    to be covered by the GNU General Public License.
  26    This exception does not however invalidate any other reasons why
  27    the executable file might be covered by the GNU General Public License.  */
  28
  29
  30 #ifndef GCC_LIBGCC2_H
  31 #define GCC_LIBGCC2_H
  32
  33 extern int __gcc_bcmp (const unsigned char *, const unsigned char *, size_t);
  34 extern void __clear_cache (char *, char *);
  35 extern void __eprintf (const char *, const char *, unsigned int, const char *)
  36   __attribute__ ((__noreturn__));
  37
  38 struct exception_descriptor;
  39 extern short int __get_eh_table_language (struct exception_descriptor *);
  40 extern short int __get_eh_table_version (struct exception_descriptor *);
  41
  42 /* Permit the tm.h file to select the endianness to use just for this
  43    file.  This is used when the endianness is determined when the
  44    compiler is run.  */
  45
  46 #ifndef LIBGCC2_WORDS_BIG_ENDIAN
  47 #define LIBGCC2_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
  48 #endif
  49
  50 #ifndef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
  51 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE LONG_DOUBLE_TYPE_SIZE
  52 #endif
  53
  54 #ifndef MIN_UNITS_PER_WORD
  55 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
  56 #endif
  57
  58 /* In the first part of this file, we are interfacing to calls generated
  59    by the compiler itself.  These calls pass values into these routines
  60    which have very specific modes (rather than very specific types), and
  61    these compiler-generated calls also expect any return values to have
  62    very specific modes (rather than very specific types).  Thus, we need
  63    to avoid using regular C language type names in this part of the file
  64    because the sizes for those types can be configured to be anything.
  65    Instead we use the following special type names.  */
  66
  67 typedef          int QItype     __attribute__ ((mode (QI)));
  68 typedef unsigned int UQItype    __attribute__ ((mode (QI)));
  69 typedef          int HItype     __attribute__ ((mode (HI)));
  70 typedef unsigned int UHItype    __attribute__ ((mode (HI)));
  71 #if MIN_UNITS_PER_WORD > 1
  72 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1.  */
  73 typedef          int SItype     __attribute__ ((mode (SI)));
  74 typedef unsigned int USItype    __attribute__ ((mode (SI)));
  75 #if LONG_LONG_TYPE_SIZE > 32
  76 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2.  */
  77 typedef          int DItype     __attribute__ ((mode (DI)));
  78 typedef unsigned int UDItype    __attribute__ ((mode (DI)));
  79 #if MIN_UNITS_PER_WORD > 4
  80 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4.  */
  81 typedef          int TItype     __attribute__ ((mode (TI)));
  82 typedef unsigned int UTItype    __attribute__ ((mode (TI)));
  83 #endif
  84 #endif
  85 #endif
  86
  87 #if BITS_PER_UNIT == 8
  88
  89 typedef         float SFtype    __attribute__ ((mode (SF)));
  90 typedef         float DFtype    __attribute__ ((mode (DF)));
  91
  92 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
  93 typedef         float XFtype    __attribute__ ((mode (XF)));
  94 #endif
  95 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
  96 typedef         float TFtype    __attribute__ ((mode (TF)));
  97 #endif
  98
  99 #else /* BITS_PER_UNIT != 8 */
 100
 101 /* On dsp's there are usually qf/hf/tqf modes used instead of the above.
 102    For now we don't support them in libgcc2.c.  */
 103
 104 #undef L_fixdfdi
 105 #undef L_fixsfdi
 106 #undef L_fixtfdi
 107 #undef L_fixunsdfdi
 108 #undef L_fixunsdfsi
 109 #undef L_fixunssfdi
 110 #undef L_fixunssfsi
 111 #undef L_fixunstfdi
 112 #undef L_fixunsxfdi
 113 #undef L_fixunsxfsi
 114 #undef L_fixxfdi
 115 #undef L_floatdidf
 116 #undef L_floatdisf
 117 #undef L_floatditf
 118 #undef L_floatdixf
 119
 120 #endif /* BITS_PER_UNIT != 8 */
 121
 122 typedef int word_type __attribute__ ((mode (__word__)));
 123
 124 /* Make sure that we don't accidentally use any normal C language built-in
 125    type names in the first part of this file.  Instead we want to use *only*
 126    the type names defined above.  The following macro definitions insure
 127    that if we *do* accidentally use some normal C language built-in type name,
 128    we will get a syntax error.  */
 129
 130 #define char bogus_type
 131 #define short bogus_type
 132 #define int bogus_type
 133 #define long bogus_type
 134 #define unsigned bogus_type
 135 #define float bogus_type
 136 #define double bogus_type
 137
 138 /* Versions prior to 3.4.4 were not taking into account the word size for
 139    the 5 trapping arithmetic functions absv, addv, subv, mulv and negv.  As
 140    a consequence, the si and di variants were always and the only ones emitted.
 141    To maintain backward compatibility, COMPAT_SIMODE_TRAPPING_ARITHMETIC is
 142    defined on platforms where it makes sense to still have the si variants
 143    emitted.  As a bonus, their implementation is now correct.  Note that the
 144    same mechanism should have been implemented for the di variants, but it
 145    turns out that no platform would define COMPAT_DIMODE_TRAPPING_ARITHMETIC
 146    if it existed.  */
 147
 148 #if MIN_UNITS_PER_WORD > 4
 149 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
 150 #define Wtype   DItype
 151 #define UWtype  UDItype
 152 #define HWtype  DItype
 153 #define UHWtype UDItype
 154 #define DWtype  TItype
 155 #define UDWtype UTItype
 156 #define __NW(a,b)       __ ## a ## di ## b
 157 #define __NDW(a,b)      __ ## a ## ti ## b
 158 #define COMPAT_SIMODE_TRAPPING_ARITHMETIC
 159 #elif MIN_UNITS_PER_WORD > 2 \
 160       || (MIN_UNITS_PER_WORD > 1 && LONG_LONG_TYPE_SIZE > 32)
 161 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 162 #define Wtype   SItype
 163 #define UWtype  USItype
 164 #define HWtype  SItype
 165 #define UHWtype USItype
 166 #define DWtype  DItype
 167 #define UDWtype UDItype
 168 #define __NW(a,b)       __ ## a ## si ## b
 169 #define __NDW(a,b)      __ ## a ## di ## b
 170 #elif MIN_UNITS_PER_WORD > 1
 171 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 172 #define Wtype   HItype
 173 #define UWtype  UHItype
 174 #define HWtype  HItype
 175 #define UHWtype UHItype
 176 #define DWtype  SItype
 177 #define UDWtype USItype
 178 #define __NW(a,b)       __ ## a ## hi ## b
 179 #define __NDW(a,b)      __ ## a ## si ## b
 180 #else
 181 #define W_TYPE_SIZE BITS_PER_UNIT
 182 #define Wtype   QItype
 183 #define UWtype  UQItype
 184 #define HWtype  QItype
 185 #define UHWtype UQItype
 186 #define DWtype  HItype
 187 #define UDWtype UHItype
 188 #define __NW(a,b)       __ ## a ## qi ## b
 189 #define __NDW(a,b)      __ ## a ## hi ## b
 190 #endif
 191
 192 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
 193 #define Wtype_MIN (- Wtype_MAX - 1)
 194
 195 #define __muldi3        __NDW(mul,3)
 196 #define __divdi3        __NDW(div,3)
 197 #define __udivdi3       __NDW(udiv,3)
 198 #define __moddi3        __NDW(mod,3)
 199 #define __umoddi3       __NDW(umod,3)
 200 #define __negdi2        __NDW(neg,2)
 201 #define __lshrdi3       __NDW(lshr,3)
 202 #define __ashldi3       __NDW(ashl,3)
 203 #define __ashrdi3       __NDW(ashr,3)
 204 #define __cmpdi2        __NDW(cmp,2)
 205 #define __ucmpdi2       __NDW(ucmp,2)
 206 #define __udivmoddi4    __NDW(udivmod,4)
 207 #define __fixunstfDI    __NDW(fixunstf,)
 208 #define __fixtfdi       __NDW(fixtf,)
 209 #define __fixunsxfDI    __NDW(fixunsxf,)
 210 #define __fixxfdi       __NDW(fixxf,)
 211 #define __fixunsdfDI    __NDW(fixunsdf,)
 212 #define __fixdfdi       __NDW(fixdf,)
 213 #define __fixunssfDI    __NDW(fixunssf,)
 214 #define __fixsfdi       __NDW(fixsf,)
 215 #define __floatdixf     __NDW(float,xf)
 216 #define __floatditf     __NDW(float,tf)
 217 #define __floatdidf     __NDW(float,df)
 218 #define __floatdisf     __NDW(float,sf)
 219 #define __fixunsxfSI    __NW(fixunsxf,)
 220 #define __fixunstfSI    __NW(fixunstf,)
 221 #define __fixunsdfSI    __NW(fixunsdf,)
 222 #define __fixunssfSI    __NW(fixunssf,)
 223
 224 #define __absvSI2       __NW(absv,2)
 225 #define __addvSI3       __NW(addv,3)
 226 #define __subvSI3       __NW(subv,3)
 227 #define __mulvSI3       __NW(mulv,3)
 228 #define __negvSI2       __NW(negv,2)
 229 #define __absvDI2       __NDW(absv,2)
 230 #define __addvDI3       __NDW(addv,3)
 231 #define __subvDI3       __NDW(subv,3)
 232 #define __mulvDI3       __NDW(mulv,3)
 233 #define __negvDI2       __NDW(negv,2)
 234
 235 #define __ffsSI2        __NW(ffs,2)
 236 #define __clzSI2        __NW(clz,2)
 237 #define __ctzSI2        __NW(ctz,2)
 238 #define __popcountSI2   __NW(popcount,2)
 239 #define __paritySI2     __NW(parity,2)
 240 #define __ffsDI2        __NDW(ffs,2)
 241 #define __clzDI2        __NDW(clz,2)
 242 #define __ctzDI2        __NDW(ctz,2)
 243 #define __popcountDI2   __NDW(popcount,2)
 244 #define __parityDI2     __NDW(parity,2)
 245
 246 extern DWtype __muldi3 (DWtype, DWtype);
 247 extern DWtype __divdi3 (DWtype, DWtype);
 248 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 249 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 250 extern DWtype __moddi3 (DWtype, DWtype);
 251
 252 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 253 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 254      !defined (L_umoddi3) && !defined (L_moddi3))
 255 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 256 #endif
 257
 258 /* __negdi2 is static inline when building other libgcc2 portions.  */
 259 #if !defined(L_divdi3) && !defined(L_moddi3)
 260 extern DWtype __negdi2 (DWtype);
 261 #endif
 262
 263 extern DWtype __lshrdi3 (DWtype, word_type);
 264 extern DWtype __ashldi3 (DWtype, word_type);
 265 extern DWtype __ashrdi3 (DWtype, word_type);
 266
 267 /* __udiv_w_sdiv is static inline when building other libgcc2 portions.  */
 268 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \
 269      !defined(L_umoddi3) && !defined(L_moddi3))
 270 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 271 #endif
 272
 273 extern word_type __cmpdi2 (DWtype, DWtype);
 274 extern word_type __ucmpdi2 (DWtype, DWtype);
 275
 276 extern Wtype __absvSI2 (Wtype);
 277 extern Wtype __addvSI3 (Wtype, Wtype);
 278 extern Wtype __subvSI3 (Wtype, Wtype);
 279 extern Wtype __mulvSI3 (Wtype, Wtype);
 280 extern Wtype __negvSI2 (Wtype);
 281 extern DWtype __absvDI2 (DWtype);
 282 extern DWtype __addvDI3 (DWtype, DWtype);
 283 extern DWtype __subvDI3 (DWtype, DWtype);
 284 extern DWtype __mulvDI3 (DWtype, DWtype);
 285 extern DWtype __negvDI2 (DWtype);
 286
 287 #ifdef COMPAT_SIMODE_TRAPPING_ARITHMETIC
 288 extern SItype __absvsi2 (SItype);
 289 extern SItype __addvsi3 (SItype, SItype);
 290 extern SItype __subvsi3 (SItype, SItype);
 291 extern SItype __mulvsi3 (SItype, SItype);
 292 extern SItype __negvsi2 (SItype);
 293 #endif /* COMPAT_SIMODE_TRAPPING_ARITHMETIC */
 294
 295 #if BITS_PER_UNIT == 8
 296 extern DWtype __fixdfdi (DFtype);
 297 extern DWtype __fixsfdi (SFtype);
 298 extern DFtype __floatdidf (DWtype);
 299 extern SFtype __floatdisf (DWtype);
 300 extern UWtype __fixunsdfSI (DFtype);
 301 extern UWtype __fixunssfSI (SFtype);
 302 extern DWtype __fixunsdfDI (DFtype);
 303 extern DWtype __fixunssfDI (SFtype);
 304
 305 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
 306 extern DWtype __fixxfdi (XFtype);
 307 extern DWtype __fixunsxfDI (XFtype);
 308 extern XFtype __floatdixf (DWtype);
 309 extern UWtype __fixunsxfSI (XFtype);
 310 #endif
 311
 312 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
 313 extern DWtype __fixunstfDI (TFtype);
 314 extern DWtype __fixtfdi (TFtype);
 315 extern TFtype __floatditf (DWtype);
 316 #endif
 317 #endif /* BITS_PER_UNIT == 8 */
 318
 319 /* DWstructs are pairs of Wtype values in the order determined by
 320    LIBGCC2_WORDS_BIG_ENDIAN.  */
 321
 322 #if LIBGCC2_WORDS_BIG_ENDIAN
 323   struct DWstruct {Wtype high, low;};
 324 #else
 325   struct DWstruct {Wtype low, high;};
 326 #endif
 327
 328 /* We need this union to unpack/pack DImode values, since we don't have
 329    any arithmetic yet.  Incoming DImode parameters are stored into the
 330    `ll' field, and the unpacked result is read from the struct `s'.  */
 331
 332 typedef union
 333 {
 334   struct DWstruct s;
 335   DWtype ll;
 336 } DWunion;
 337
 338 #include "longlong.h"
 339
 340 #endif /* ! GCC_LIBGCC2_H */