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 *__builtin_saveregs (void);
  27 extern void __dummy (void);
  28 extern void __clear_cache (char *, char *);
  29 extern void __eprintf (const char *, const char *, unsigned int, const char *)
  30   __attribute__ ((__noreturn__));
  31
  32 struct bb;
  33 extern void __bb_exit_func (void);
  34 extern void __bb_init_func (struct bb *);
  35 extern void __bb_fork_func (void);
  36 extern void __bb_trace_func (void);
  37 extern void __bb_trace_ret (void);
  38 extern void __bb_init_trace_func (struct bb *, unsigned long);
  39
  40 struct exception_descriptor;
  41 extern short int __get_eh_table_language (struct exception_descriptor *);
  42 extern short int __get_eh_table_version (struct exception_descriptor *);
  43
  44 /* Permit the tm.h file to select the endianness to use just for this
  45    file.  This is used when the endianness is determined when the
  46    compiler is run.  */
  47
  48 #ifndef LIBGCC2_WORDS_BIG_ENDIAN
  49 #define LIBGCC2_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
  50 #endif
  51
  52 #ifndef LIBGCC2_LONG_DOUBLE_TYPE_SIZE
  53 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE LONG_DOUBLE_TYPE_SIZE
  54 #endif
  55
  56 #ifndef MIN_UNITS_PER_WORD
  57 #define MIN_UNITS_PER_WORD UNITS_PER_WORD
  58 #endif
  59
  60 /* In the first part of this file, we are interfacing to calls generated
  61    by the compiler itself.  These calls pass values into these routines
  62    which have very specific modes (rather than very specific types), and
  63    these compiler-generated calls also expect any return values to have
  64    very specific modes (rather than very specific types).  Thus, we need
  65    to avoid using regular C language type names in this part of the file
  66    because the sizes for those types can be configured to be anything.
  67    Instead we use the following special type names.  */
  68
  69 typedef          int QItype     __attribute__ ((mode (QI)));
  70 typedef unsigned int UQItype    __attribute__ ((mode (QI)));
  71 typedef          int HItype     __attribute__ ((mode (HI)));
  72 typedef unsigned int UHItype    __attribute__ ((mode (HI)));
  73 #if MIN_UNITS_PER_WORD > 1
  74 /* These typedefs are usually forbidden on dsp's with UNITS_PER_WORD 1 */
  75 typedef          int SItype     __attribute__ ((mode (SI)));
  76 typedef unsigned int USItype    __attribute__ ((mode (SI)));
  77 #if LONG_LONG_TYPE_SIZE > 32
  78 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 2 */
  79 typedef          int DItype     __attribute__ ((mode (DI)));
  80 typedef unsigned int UDItype    __attribute__ ((mode (DI)));
  81 #if MIN_UNITS_PER_WORD > 4
  82 /* These typedefs are usually forbidden on archs with UNITS_PER_WORD 4 */
  83 typedef          int TItype     __attribute__ ((mode (TI)));
  84 typedef unsigned int UTItype    __attribute__ ((mode (TI)));
  85 #endif
  86 #endif
  87 #endif
  88
  89 #if BITS_PER_UNIT == 8
  90
  91 typedef         float SFtype    __attribute__ ((mode (SF)));
  92 typedef         float DFtype    __attribute__ ((mode (DF)));
  93
  94 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
  95 typedef         float XFtype    __attribute__ ((mode (XF)));
  96 #endif
  97 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
  98 typedef         float TFtype    __attribute__ ((mode (TF)));
  99 #endif
 100
 101 #else /* BITS_PER_UNIT != 8 */
 102
 103 /* On dsp's there are usually qf/hf/tqf modes used instead of the above.
 104    For now we don't support them in libgcc2.c.  */
 105
 106 #undef L_fixdfdi
 107 #undef L_fixsfdi
 108 #undef L_fixtfdi
 109 #undef L_fixunsdfdi
 110 #undef L_fixunsdfsi
 111 #undef L_fixunssfdi
 112 #undef L_fixunssfsi
 113 #undef L_fixunstfdi
 114 #undef L_fixunsxfdi
 115 #undef L_fixunsxfsi
 116 #undef L_fixxfdi
 117 #undef L_floatdidf
 118 #undef L_floatdisf
 119 #undef L_floatditf
 120 #undef L_floatdixf
 121
 122 #endif /* BITS_PER_UNIT != 8 */
 123
 124 typedef int word_type __attribute__ ((mode (__word__)));
 125
 126 /* Make sure that we don't accidentally use any normal C language built-in
 127    type names in the first part of this file.  Instead we want to use *only*
 128    the type names defined above.  The following macro definitions insure
 129    that if we *do* accidentally use some normal C language built-in type name,
 130    we will get a syntax error.  */
 131
 132 #define char bogus_type
 133 #define short bogus_type
 134 #define int bogus_type
 135 #define long bogus_type
 136 #define unsigned bogus_type
 137 #define float bogus_type
 138 #define double bogus_type
 139
 140 #if MIN_UNITS_PER_WORD > 4
 141 #define W_TYPE_SIZE (8 * BITS_PER_UNIT)
 142 #define Wtype   DItype
 143 #define UWtype  UDItype
 144 #define HWtype  DItype
 145 #define UHWtype UDItype
 146 #define DWtype  TItype
 147 #define UDWtype UTItype
 148 #define __NW(a,b)       __ ## a ## di ## b
 149 #define __NDW(a,b)      __ ## a ## ti ## b
 150 #elif MIN_UNITS_PER_WORD > 2 \
 151       || (MIN_UNITS_PER_WORD > 1 && LONG_LONG_TYPE_SIZE > 32)
 152 #define W_TYPE_SIZE (4 * BITS_PER_UNIT)
 153 #define Wtype   SItype
 154 #define UWtype  USItype
 155 #define HWtype  SItype
 156 #define UHWtype USItype
 157 #define DWtype  DItype
 158 #define UDWtype UDItype
 159 #define __NW(a,b)       __ ## a ## si ## b
 160 #define __NDW(a,b)      __ ## a ## di ## b
 161 #elif MIN_UNITS_PER_WORD > 1
 162 #define W_TYPE_SIZE (2 * BITS_PER_UNIT)
 163 #define Wtype   HItype
 164 #define UWtype  UHItype
 165 #define HWtype  HItype
 166 #define UHWtype UHItype
 167 #define DWtype  SItype
 168 #define UDWtype USItype
 169 #define __NW(a,b)       __ ## a ## hi ## b
 170 #define __NDW(a,b)      __ ## a ## si ## b
 171 #else
 172 #define W_TYPE_SIZE BITS_PER_UNIT
 173 #define Wtype   QItype
 174 #define UWtype  UQItype
 175 #define HWtype  QItype
 176 #define UHWtype UQItype
 177 #define DWtype  HItype
 178 #define UDWtype UHItype
 179 #define __NW(a,b)       __ ## a ## qi ## b
 180 #define __NDW(a,b)      __ ## a ## hi ## b
 181 #endif
 182
 183 #define Wtype_MAX ((Wtype)(((UWtype)1 << (W_TYPE_SIZE - 1)) - 1))
 184 #define Wtype_MIN (- Wtype_MAX - 1)
 185
 186 #define __muldi3        __NDW(mul,3)
 187 #define __divdi3        __NDW(div,3)
 188 #define __udivdi3       __NDW(udiv,3)
 189 #define __moddi3        __NDW(mod,3)
 190 #define __umoddi3       __NDW(umod,3)
 191 #define __negdi2        __NDW(neg,2)
 192 #define __lshrdi3       __NDW(lshr,3)
 193 #define __ashldi3       __NDW(ashl,3)
 194 #define __ashrdi3       __NDW(ashr,3)
 195 #define __ffsdi2        __NDW(ffs,2)
 196 #define __cmpdi2        __NDW(cmp,2)
 197 #define __ucmpdi2       __NDW(ucmp,2)
 198 #define __udivmoddi4    __NDW(udivmod,4)
 199 #define __fixunstfDI    __NDW(fixunstf,)
 200 #define __fixtfdi       __NDW(fixtf,)
 201 #define __fixunsxfDI    __NDW(fixunsxf,)
 202 #define __fixxfdi       __NDW(fixxf,)
 203 #define __fixunsdfDI    __NDW(fixunsdf,)
 204 #define __fixdfdi       __NDW(fixdf,)
 205 #define __fixunssfDI    __NDW(fixunssf,)
 206 #define __fixsfdi       __NDW(fixsf,)
 207 #define __floatdixf     __NDW(float,xf)
 208 #define __floatditf     __NDW(float,tf)
 209 #define __floatdidf     __NDW(float,df)
 210 #define __floatdisf     __NDW(float,sf)
 211 #define __fixunsxfSI    __NW(fixunsxf,)
 212 #define __fixunstfSI    __NW(fixunstf,)
 213 #define __fixunsdfSI    __NW(fixunsdf,)
 214 #define __fixunssfSI    __NW(fixunssf,)
 215
 216 extern DWtype __muldi3 (DWtype, DWtype);
 217 extern DWtype __divdi3 (DWtype, DWtype);
 218 extern UDWtype __udivdi3 (UDWtype, UDWtype);
 219 extern UDWtype __umoddi3 (UDWtype, UDWtype);
 220 extern DWtype __moddi3 (DWtype, DWtype);
 221
 222 /* __udivmoddi4 is static inline when building other libgcc2 portions.  */
 223 #if (!defined (L_udivdi3) && !defined (L_divdi3) && \
 224      !defined (L_umoddi3) && !defined (L_moddi3))
 225 extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *);
 226 #endif
 227
 228 /* __negdi2 is static inline when building other libgcc2 portions.  */
 229 #if !defined(L_divdi3) && !defined(L_moddi3)
 230 extern DWtype __negdi2 (DWtype);
 231 #endif
 232
 233 extern DWtype __lshrdi3 (DWtype, word_type);
 234 extern DWtype __ashldi3 (DWtype, word_type);
 235 extern DWtype __ashrdi3 (DWtype, word_type);
 236 extern DWtype __ffsdi2 (DWtype);
 237
 238 /* __udiv_w_sdiv is static inline when building other libgcc2 portions.  */
 239 #if (!defined(L_udivdi3) && !defined(L_divdi3) && \
 240      !defined(L_umoddi3) && !defined(L_moddi3))
 241 extern UWtype __udiv_w_sdiv (UWtype *, UWtype, UWtype, UWtype);
 242 #endif
 243
 244 extern word_type __cmpdi2 (DWtype, DWtype);
 245 extern word_type __ucmpdi2 (DWtype, DWtype);
 246
 247 extern Wtype __absvsi2 (Wtype);
 248 extern DWtype __absvdi2 (DWtype);
 249 extern Wtype __addvsi3 (Wtype, Wtype);
 250 extern DWtype __addvdi3 (DWtype, DWtype);
 251 extern Wtype __subvsi3 (Wtype, Wtype);
 252 extern DWtype __subvdi3 (DWtype, DWtype);
 253 extern Wtype __mulvsi3 (Wtype, Wtype);
 254 extern DWtype __mulvdi3 (DWtype, DWtype);
 255 extern Wtype __negvsi2 (Wtype);
 256 extern DWtype __negvdi2 (DWtype);
 257
 258 #if BITS_PER_UNIT == 8
 259 extern DWtype __fixdfdi (DFtype);
 260 extern DWtype __fixsfdi (SFtype);
 261 extern DFtype __floatdidf (DWtype);
 262 extern SFtype __floatdisf (DWtype);
 263 extern UWtype __fixunsdfSI (DFtype);
 264 extern UWtype __fixunssfSI (SFtype);
 265 extern DWtype __fixunsdfDI (DFtype);
 266 extern DWtype __fixunssfDI (SFtype);
 267
 268 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
 269 extern DWtype __fixxfdi (XFtype);
 270 extern DWtype __fixunsxfDI (XFtype);
 271 extern XFtype __floatdixf (DWtype);
 272 extern UWtype __fixunsxfSI (XFtype);
 273 #endif
 274
 275 #if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
 276 extern DWtype __fixunstfDI (TFtype);
 277 extern DWtype __fixtfdi (TFtype);
 278 extern TFtype __floatditf (DWtype);
 279 #endif
 280 #endif /* BITS_PER_UNIT == 8 */
 281
 282 /* DWstructs are pairs of Wtype values in the order determined by
 283    LIBGCC2_WORDS_BIG_ENDIAN.  */
 284
 285 #if LIBGCC2_WORDS_BIG_ENDIAN
 286   struct DWstruct {Wtype high, low;};
 287 #else
 288   struct DWstruct {Wtype low, high;};
 289 #endif
 290
 291 /* We need this union to unpack/pack DImode values, since we don't have
 292    any arithmetic yet.  Incoming DImode parameters are stored into the
 293    `ll' field, and the unpacked result is read from the struct `s'.  */
 294
 295 typedef union
 296 {
 297   struct DWstruct s;
 298   DWtype ll;
 299 } DWunion;
 300
 301 #include "longlong.h"
 302
 303 #endif /* __LIBGCC2_H__ */