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 __LIBGCC2_H__
  23 #define __LIBGCC2_H__
  24
  25 extern int __gcc_bcmp (const unsigned char *, const unsigned char *, size_t);
  26 extern void __clear_cache (char *, char *);
  27
  28 struct bb;
  29 extern void __bb_exit_func (void);
  30 extern void __bb_init_func (struct bb *);
  31 extern void __bb_fork_func (void);
  32 extern void __bb_trace_func (void);
  33 extern void __bb_trace_ret (void);
  34 extern void __bb_init_trace_func (struct bb *, unsigned long);
  35
  36 struct exception_descriptor;
  37 extern short int __get_eh_table_language (struct exception_descriptor *);
  38 extern short int __get_eh_table_version (struct exception_descriptor *);
  39
  40 /* Permit the tm.h file to select the endianness to use just for this
  41    file.  This is used when the endianness is determined when the
  42    compiler is run.  */
  43
  44 #ifndef LIBGCC2_WORDS_BIG_ENDIAN
  45 #define LIBGCC2_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
  46 #endif
  47
  48 #ifndef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
  49 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE LONG_DOUBLE_TYPE_SIZE
  50 #endif
  51
  52 #ifndef MIN_UNITS_PER_WORD
  53 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
  54 #endif
  55
  56 /* In the first part of this file, we are interfacing to calls generated
  57    by the compiler itself.  These calls pass values into these routines
  58    which have very specific modes (rather than very specific types), and
  59    these compiler-generated calls also expect any return values to have
  60    very specific modes (rather than very specific types).  Thus, we need
  61    to avoid using regular C language type names in this part of the file
  62    because the sizes for those types can be configured to be anything.
  63    Instead we use the following special type names.  */
  64
  65 typedef          int QItype     __attribute__ ((mode (QI)));
  66 typedef unsigned int UQItype    __attribute__ ((mode (QI)));
  67 typedef          int HItype     __attribute__ ((mode (HI)));
  68 typedef unsigned int UHItype    __attribute__ ((mode (HI)));
  69 #if MIN_UNITS_PER_WORD > 1
  70 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1 */
  71 typedef          int SItype     __attribute__ ((mode (SI)));
  72 typedef unsigned int USItype    __attribute__ ((mode (SI)));
  73 #if LONG_LONG_TYPE_SIZE > 32
  74 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2 */
  75 typedef          int DItype     __attribute__ ((mode (DI)));
  76 typedef unsigned int UDItype    __attribute__ ((mode (DI)));
  77 #if MIN_UNITS_PER_WORD > 4
  78 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4 */
  79 typedef          int TItype     __attribute__ ((mode (TI)));
  80 typedef unsigned int UTItype    __attribute__ ((mode (TI)));
  81 #endif
  82 #endif
  83 #endif
  84
  85 #if BITS_PER_UNIT == 8
  86
  87 typedef         float SFtype    __attribute__ ((mode (SF)));
  88 typedef         float DFtype    __attribute__ ((mode (DF)));
  89
  90 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
  91 typedef         float XFtype    __attribute__ ((mode (XF)));
  92 #endif
  93 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
  94 typedef         float TFtype    __attribute__ ((mode (TF)));
  95 #endif
  96
  97 #else /* BITS_PER_UNIT != 8 */
  98
  99 /* On dsp's there are usually qf/hf/tqf modes used instead of the above.
 100    For now we don't support them in libgcc2.c.  */
 101
 102 #undef L_fixdfdi
 103 #undef L_fixsfdi
 104 #undef L_fixtfdi
 105 #undef L_fixunsdfdi
 106 #undef L_fixunsdfsi
 107 #undef L_fixunssfdi
 108 #undef L_fixunssfsi
 109 #undef L_fixunstfdi
 110 #undef L_fixunsxfdi
 111 #undef L_fixunsxfsi
 112 #undef L_fixxfdi
 113 #undef L_floatdidf
 114 #undef L_floatdisf
 115 #undef L_floatditf
 116 #undef L_floatdixf
 117
 118 #endif /* BITS_PER_UNIT != 8 */
 119
 120 typedef int word_type __attribute__ ((mode (__word__)));
 121
 122 /* Make sure that we don't accidentally use any normal C language built-in
 123    type names in the first part of this file.  Instead we want to use *only*
 124    the type names defined above.  The following macro definitions insure
 125    that if we *do* accidentally use some normal C language built-in type name,
 126    we will get a syntax error.  */
 127
 128 #define char bogus_type
 129 #define short bogus_type
 130 #define int bogus_type
 131 #define long bogus_type
 132 #define unsigned bogus_type
 133 #define float bogus_type
 134 #define double bogus_type
 135
 136 #if MIN_UNITS_PER_WORD > 4
 137 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
 138 #define Wtype   DItype
 139 #define UWtype  UDItype
 140 #define HWtype  DItype
 141 #define UHWtype UDItype
 142 #define DWtype  TItype
 143 #define UDWtype UTItype
 144 #define __NW(a,b)       __ ## a ## di ## b
 145 #define __NDW(a,b)      __ ## a ## ti ## b
 146 #elif MIN_UNITS_PER_WORD > 2 \
 147       || (MIN_UNITS_PER_WORD > 1 && LONG_LONG_TYPE_SIZE > 32)
 148 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 149 #define Wtype   SItype
 150 #define UWtype  USItype
 151 #define HWtype  SItype
 152 #define UHWtype USItype
 153 #define DWtype  DItype
 154 #define UDWtype UDItype
 155 #define __NW(a,b)       __ ## a ## si ## b
 156 #define __NDW(a,b)      __ ## a ## di ## b
 157 #elif MIN_UNITS_PER_WORD > 1
 158 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 159 #define Wtype   HItype
 160 #define UWtype  UHItype
 161 #define HWtype  HItype
 162 #define UHWtype UHItype
 163 #define DWtype  SItype
 164 #define UDWtype USItype
 165 #define __NW(a,b)       __ ## a ## hi ## b
 166 #define __NDW(a,b)      __ ## a ## si ## b
 167 #else
 168 #define W_TYPE_SIZE BITS_PER_UNIT
 169 #define Wtype   QItype
 170 #define UWtype  UQItype
 171 #define HWtype  QItype
 172 #define UHWtype UQItype
 173 #define DWtype  HItype
 174 #define UDWtype UHItype
 175 #define __NW(a,b)       __ ## a ## qi ## b
 176 #define __NDW(a,b)      __ ## a ## hi ## b
 177 #endif
 178
 179 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
 180 #define Wtype_MIN (- Wtype_MAX - 1)
 181
 182 #define __muldi3        __NDW(mul,3)
 183 #define __divdi3        __NDW(div,3)
 184 #define __udivdi3       __NDW(udiv,3)
 185 #define __moddi3        __NDW(mod,3)
 186 #define __umoddi3       __NDW(umod,3)
 187 #define __negdi2        __NDW(neg,2)
 188 #define __lshrdi3       __NDW(lshr,3)
 189 #define __ashldi3       __NDW(ashl,3)
 190 #define __ashrdi3       __NDW(ashr,3)
 191 #define __ffsdi2        __NDW(ffs,2)
 192 #define __cmpdi2        __NDW(cmp,2)
 193 #define __ucmpdi2       __NDW(ucmp,2)
 194 #define __udivmoddi4    __NDW(udivmod,4)
 195 #define __fixunstfDI    __NDW(fixunstf,)
 196 #define __fixtfdi       __NDW(fixtf,)
 197 #define __fixunsxfDI    __NDW(fixunsxf,)
 198 #define __fixxfdi       __NDW(fixxf,)
 199 #define __fixunsdfDI    __NDW(fixunsdf,)
 200 #define __fixdfdi       __NDW(fixdf,)
 201 #define __fixunssfDI    __NDW(fixunssf,)
 202 #define __fixsfdi       __NDW(fixsf,)
 203 #define __floatdixf     __NDW(float,xf)
 204 #define __floatditf     __NDW(float,tf)
 205 #define __floatdidf     __NDW(float,df)
 206 #define __floatdisf     __NDW(float,sf)
 207 #define __fixunsxfSI    __NW(fixunsxf,)
 208 #define __fixunstfSI    __NW(fixunstf,)
 209 #define __fixunsdfSI    __NW(fixunsdf,)
 210 #define __fixunssfSI    __NW(fixunssf,)
 211
 212 extern DWtype __muldi3 (DWtype, DWtype);
 213 extern DWtype __divdi3 (DWtype, DWtype);
 214 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 215 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 216 extern DWtype __moddi3 (DWtype, DWtype);
 217
 218 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 219 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 220      !defined (L_umoddi3) && !defined (L_moddi3))
 221 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 222 #endif
 223
 224 /* __negdi2 is static inline when building other libgcc2 portions.  */
 225 #if !defined(L_divdi3) && !defined(L_moddi3)
 226 extern DWtype __negdi2 (DWtype);
 227 #endif
 228
 229 extern DWtype __lshrdi3 (DWtype, word_type);
 230 extern DWtype __ashldi3 (DWtype, word_type);
 231 extern DWtype __ashrdi3 (DWtype, word_type);
 232 extern DWtype __ffsdi2 (DWtype);
 233
 234 /* __udiv_w_sdiv 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 UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 238 #endif
 239
 240 extern word_type __cmpdi2 (DWtype, DWtype);
 241 extern word_type __ucmpdi2 (DWtype, DWtype);
 242
 243 extern Wtype __absvsi2 (Wtype);
 244 extern DWtype __absvdi2 (DWtype);
 245 extern Wtype __addvsi3 (Wtype, Wtype);
 246 extern DWtype __addvdi3 (DWtype, DWtype);
 247 extern Wtype __subvsi3 (Wtype, Wtype);
 248 extern DWtype __subvdi3 (DWtype, DWtype);
 249 extern Wtype __mulvsi3 (Wtype, Wtype);
 250 extern DWtype __mulvdi3 (DWtype, DWtype);
 251 extern Wtype __negvsi2 (Wtype);
 252 extern DWtype __negvdi2 (DWtype);
 253
 254 #if BITS_PER_UNIT == 8
 255 extern DWtype __fixdfdi (DFtype);
 256 extern DWtype __fixsfdi (SFtype);
 257 extern DFtype __floatdidf (DWtype);
 258 extern SFtype __floatdisf (DWtype);
 259 extern UWtype __fixunsdfSI (DFtype);
 260 extern UWtype __fixunssfSI (SFtype);
 261 extern DWtype __fixunsdfDI (DFtype);
 262 extern DWtype __fixunssfDI (SFtype);
 263
 264 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
 265 extern DWtype __fixxfdi (XFtype);
 266 extern DWtype __fixunsxfDI (XFtype);
 267 extern XFtype __floatdixf (DWtype);
 268 extern UWtype __fixunsxfSI (XFtype);
 269 #endif
 270
 271 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
 272 extern DWtype __fixunstfDI (TFtype);
 273 extern DWtype __fixtfdi (TFtype);
 274 extern TFtype __floatditf (DWtype);
 275 #endif
 276 #endif /* BITS_PER_UNIT == 8 */
 277
 278 /* DWstructs are pairs of Wtype values in the order determined by
 279    LIBGCC2_WORDS_BIG_ENDIAN.  */
 280
 281 #if LIBGCC2_WORDS_BIG_ENDIAN
 282   struct DWstruct {Wtype high, low;};
 283 #else
 284   struct DWstruct {Wtype low, high;};
 285 #endif
 286
 287 /* We need this union to unpack/pack DImode values, since we don't have
 288    any arithmetic yet.  Incoming DImode parameters are stored into the
 289    `ll' field, and the unpacked result is read from the struct `s'.  */
 290
 291 typedef union
 292 {
 293   struct DWstruct s;
 294   DWtype ll;
 295 } DWunion;
 296
 297 #include "longlong.h"
 298
 299 #endif /* __LIBGCC2_H__ */