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 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 extern void __bb_trace_func (void);
  35 extern void __bb_trace_ret (void);
  36 extern void __bb_init_trace_func (struct bb *, unsigned long);
  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 #if MIN_UNITS_PER_WORD > 4
 139 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
 140 #define Wtype   DItype
 141 #define UWtype  UDItype
 142 #define HWtype  DItype
 143 #define UHWtype UDItype
 144 #define DWtype  TItype
 145 #define UDWtype UTItype
 146 #define __NW(a,b)       __ ## a ## di ## b
 147 #define __NDW(a,b)      __ ## a ## ti ## b
 148 #elif MIN_UNITS_PER_WORD > 2 \
 149       || (MIN_UNITS_PER_WORD > 1 && LONG_LONG_TYPE_SIZE > 32)
 150 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 151 #define Wtype   SItype
 152 #define UWtype  USItype
 153 #define HWtype  SItype
 154 #define UHWtype USItype
 155 #define DWtype  DItype
 156 #define UDWtype UDItype
 157 #define __NW(a,b)       __ ## a ## si ## b
 158 #define __NDW(a,b)      __ ## a ## di ## b
 159 #elif MIN_UNITS_PER_WORD > 1
 160 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 161 #define Wtype   HItype
 162 #define UWtype  UHItype
 163 #define HWtype  HItype
 164 #define UHWtype UHItype
 165 #define DWtype  SItype
 166 #define UDWtype USItype
 167 #define __NW(a,b)       __ ## a ## hi ## b
 168 #define __NDW(a,b)      __ ## a ## si ## b
 169 #else
 170 #define W_TYPE_SIZE BITS_PER_UNIT
 171 #define Wtype   QItype
 172 #define UWtype  UQItype
 173 #define HWtype  QItype
 174 #define UHWtype UQItype
 175 #define DWtype  HItype
 176 #define UDWtype UHItype
 177 #define __NW(a,b)       __ ## a ## qi ## b
 178 #define __NDW(a,b)      __ ## a ## hi ## b
 179 #endif
 180
 181 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
 182 #define Wtype_MIN (- Wtype_MAX - 1)
 183
 184 #define __muldi3        __NDW(mul,3)
 185 #define __divdi3        __NDW(div,3)
 186 #define __udivdi3       __NDW(udiv,3)
 187 #define __moddi3        __NDW(mod,3)
 188 #define __umoddi3       __NDW(umod,3)
 189 #define __negdi2        __NDW(neg,2)
 190 #define __lshrdi3       __NDW(lshr,3)
 191 #define __ashldi3       __NDW(ashl,3)
 192 #define __ashrdi3       __NDW(ashr,3)
 193 #define __ffsdi2        __NDW(ffs,2)
 194 #define __cmpdi2        __NDW(cmp,2)
 195 #define __ucmpdi2       __NDW(ucmp,2)
 196 #define __udivmoddi4    __NDW(udivmod,4)
 197 #define __fixunstfDI    __NDW(fixunstf,)
 198 #define __fixtfdi       __NDW(fixtf,)
 199 #define __fixunsxfDI    __NDW(fixunsxf,)
 200 #define __fixxfdi       __NDW(fixxf,)
 201 #define __fixunsdfDI    __NDW(fixunsdf,)
 202 #define __fixdfdi       __NDW(fixdf,)
 203 #define __fixunssfDI    __NDW(fixunssf,)
 204 #define __fixsfdi       __NDW(fixsf,)
 205 #define __floatdixf     __NDW(float,xf)
 206 #define __floatditf     __NDW(float,tf)
 207 #define __floatdidf     __NDW(float,df)
 208 #define __floatdisf     __NDW(float,sf)
 209 #define __fixunsxfSI    __NW(fixunsxf,)
 210 #define __fixunstfSI    __NW(fixunstf,)
 211 #define __fixunsdfSI    __NW(fixunsdf,)
 212 #define __fixunssfSI    __NW(fixunssf,)
 213
 214 extern DWtype __muldi3 (DWtype, DWtype);
 215 extern DWtype __divdi3 (DWtype, DWtype);
 216 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 217 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 218 extern DWtype __moddi3 (DWtype, DWtype);
 219
 220 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 221 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 222      !defined (L_umoddi3) && !defined (L_moddi3))
 223 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 224 #endif
 225
 226 /* __negdi2 is static inline when building other libgcc2 portions.  */
 227 #if !defined(L_divdi3) && !defined(L_moddi3)
 228 extern DWtype __negdi2 (DWtype);
 229 #endif
 230
 231 extern DWtype __lshrdi3 (DWtype, word_type);
 232 extern DWtype __ashldi3 (DWtype, word_type);
 233 extern DWtype __ashrdi3 (DWtype, word_type);
 234 extern DWtype __ffsdi2 (DWtype);
 235
 236 /* __udiv_w_sdiv is static inline when building other libgcc2 portions.  */
 237 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \
 238      !defined(L_umoddi3) && !defined(L_moddi3))
 239 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 240 #endif
 241
 242 extern word_type __cmpdi2 (DWtype, DWtype);
 243 extern word_type __ucmpdi2 (DWtype, DWtype);
 244
 245 extern Wtype __absvsi2 (Wtype);
 246 extern DWtype __absvdi2 (DWtype);
 247 extern Wtype __addvsi3 (Wtype, Wtype);
 248 extern DWtype __addvdi3 (DWtype, DWtype);
 249 extern Wtype __subvsi3 (Wtype, Wtype);
 250 extern DWtype __subvdi3 (DWtype, DWtype);
 251 extern Wtype __mulvsi3 (Wtype, Wtype);
 252 extern DWtype __mulvdi3 (DWtype, DWtype);
 253 extern Wtype __negvsi2 (Wtype);
 254 extern DWtype __negvdi2 (DWtype);
 255
 256 #if BITS_PER_UNIT == 8
 257 extern DWtype __fixdfdi (DFtype);
 258 extern DWtype __fixsfdi (SFtype);
 259 extern DFtype __floatdidf (DWtype);
 260 extern SFtype __floatdisf (DWtype);
 261 extern UWtype __fixunsdfSI (DFtype);
 262 extern UWtype __fixunssfSI (SFtype);
 263 extern DWtype __fixunsdfDI (DFtype);
 264 extern DWtype __fixunssfDI (SFtype);
 265
 266 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
 267 extern DWtype __fixxfdi (XFtype);
 268 extern DWtype __fixunsxfDI (XFtype);
 269 extern XFtype __floatdixf (DWtype);
 270 extern UWtype __fixunsxfSI (XFtype);
 271 #endif
 272
 273 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
 274 extern DWtype __fixunstfDI (TFtype);
 275 extern DWtype __fixtfdi (TFtype);
 276 extern TFtype __floatditf (DWtype);
 277 #endif
 278 #endif /* BITS_PER_UNIT == 8 */
 279
 280 /* DWstructs are pairs of Wtype values in the order determined by
 281    LIBGCC2_WORDS_BIG_ENDIAN.  */
 282
 283 #if LIBGCC2_WORDS_BIG_ENDIAN
 284   struct DWstruct {Wtype high, low;};
 285 #else
 286   struct DWstruct {Wtype low, high;};
 287 #endif
 288
 289 /* We need this union to unpack/pack DImode values, since we don't have
 290    any arithmetic yet.  Incoming DImode parameters are stored into the
 291    `ll' field, and the unpacked result is read from the struct `s'.  */
 292
 293 typedef union
 294 {
 295   struct DWstruct s;
 296   DWtype ll;
 297 } DWunion;
 298
 299 #include "longlong.h"
 300
 301 #endif /* ! GCC_LIBGCC2_H */