gcc/config/avr/avr-c.c

   1 /* Copyright (C) 2009-2016 Free Software Foundation, Inc.
   2    Contributed by Anatoly Sokolov (aesok@post.ru)
   3
   4    This file is part of GCC.
   5
   6    GCC is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3, or (at your option)
   9    any later version.
  10
  11    GCC is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GCC; see the file COPYING3.  If not see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 /* Not included in avr.c since this requires C front end.  */
  21
  22 #include "config.h"
  23 #include "system.h"
  24 #include "coretypes.h"
  25 #include "target.h"
  26 #include "c-family/c-common.h"
  27 #include "stor-layout.h"
  28 #include "langhooks.h"
  29
  30
  31 /* IDs for all the AVR builtins.  */
  32
  33 enum avr_builtin_id
  34   {
  35 #define DEF_BUILTIN(NAME, N_ARGS, TYPE, CODE, LIBNAME)  \
  36     AVR_BUILTIN_ ## NAME,
  37 #include "builtins.def"
  38 #undef DEF_BUILTIN
  39
  40     AVR_BUILTIN_COUNT
  41   };
  42
  43
  44 /* Implement `TARGET_RESOLVE_OVERLOADED_PLUGIN'.  */
  45
  46 static tree
  47 avr_resolve_overloaded_builtin (unsigned int iloc, tree fndecl, void *vargs)
  48 {
  49   tree type0, type1, fold = NULL_TREE;
  50   enum avr_builtin_id id = AVR_BUILTIN_COUNT;
  51   location_t loc = (location_t) iloc;
  52   vec<tree, va_gc> &args = * (vec<tree, va_gc>*) vargs;
  53
  54   switch (DECL_FUNCTION_CODE (fndecl))
  55     {
  56     default:
  57       break;
  58
  59     case AVR_BUILTIN_ABSFX:
  60       if (args.length() != 1)
  61         {
  62           error_at (loc, "%qs expects 1 argument but %d given",
  63                     "absfx", (int) args.length());
  64
  65           fold = error_mark_node;
  66           break;
  67         }
  68
  69       type0 = TREE_TYPE (args[0]);
  70
  71       if (!FIXED_POINT_TYPE_P (type0))
  72         {
  73           error_at (loc, "%qs expects a fixed-point value as argument",
  74                     "absfx");
  75
  76           fold = error_mark_node;
  77         }
  78
  79       switch (TYPE_MODE (type0))
  80         {
  81         case QQmode: id = AVR_BUILTIN_ABSHR; break;
  82         case HQmode: id = AVR_BUILTIN_ABSR; break;
  83         case SQmode: id = AVR_BUILTIN_ABSLR; break;
  84         case DQmode: id = AVR_BUILTIN_ABSLLR; break;
  85
  86         case HAmode: id = AVR_BUILTIN_ABSHK; break;
  87         case SAmode: id = AVR_BUILTIN_ABSK; break;
  88         case DAmode: id = AVR_BUILTIN_ABSLK; break;
  89         case TAmode: id = AVR_BUILTIN_ABSLLK; break;
  90
  91         case UQQmode:
  92         case UHQmode:
  93         case USQmode:
  94         case UDQmode:
  95         case UHAmode:
  96         case USAmode:
  97         case UDAmode:
  98         case UTAmode:
  99           warning_at (loc, 0, "using %qs with unsigned type has no effect",
 100                       "absfx");
 101           return args[0];
 102
 103         default:
 104           error_at (loc, "no matching fixed-point overload found for %qs",
 105                     "absfx");
 106
 107           fold = error_mark_node;
 108           break;
 109         }
 110
 111       fold = targetm.builtin_decl (id, true);
 112
 113       if (fold != error_mark_node)
 114         fold = build_function_call_vec (loc, vNULL, fold, &args, NULL);
 115
 116       break; // absfx
 117
 118     case AVR_BUILTIN_ROUNDFX:
 119       if (args.length() != 2)
 120         {
 121           error_at (loc, "%qs expects 2 arguments but %d given",
 122                     "roundfx", (int) args.length());
 123
 124           fold = error_mark_node;
 125           break;
 126         }
 127
 128       type0 = TREE_TYPE (args[0]);
 129       type1 = TREE_TYPE (args[1]);
 130
 131       if (!FIXED_POINT_TYPE_P (type0))
 132         {
 133           error_at (loc, "%qs expects a fixed-point value as first argument",
 134                     "roundfx");
 135
 136           fold = error_mark_node;
 137         }
 138
 139       if (!INTEGRAL_TYPE_P (type1))
 140         {
 141           error_at (loc, "%qs expects an integer value as second argument",
 142                     "roundfx");
 143
 144           fold = error_mark_node;
 145         }
 146
 147       switch (TYPE_MODE (type0))
 148         {
 149         case QQmode: id = AVR_BUILTIN_ROUNDHR; break;
 150         case HQmode: id = AVR_BUILTIN_ROUNDR; break;
 151         case SQmode: id = AVR_BUILTIN_ROUNDLR; break;
 152         case DQmode: id = AVR_BUILTIN_ROUNDLLR; break;
 153
 154         case UQQmode: id = AVR_BUILTIN_ROUNDUHR; break;
 155         case UHQmode: id = AVR_BUILTIN_ROUNDUR; break;
 156         case USQmode: id = AVR_BUILTIN_ROUNDULR; break;
 157         case UDQmode: id = AVR_BUILTIN_ROUNDULLR; break;
 158
 159         case HAmode: id = AVR_BUILTIN_ROUNDHK; break;
 160         case SAmode: id = AVR_BUILTIN_ROUNDK; break;
 161         case DAmode: id = AVR_BUILTIN_ROUNDLK; break;
 162         case TAmode: id = AVR_BUILTIN_ROUNDLLK; break;
 163
 164         case UHAmode: id = AVR_BUILTIN_ROUNDUHK; break;
 165         case USAmode: id = AVR_BUILTIN_ROUNDUK; break;
 166         case UDAmode: id = AVR_BUILTIN_ROUNDULK; break;
 167         case UTAmode: id = AVR_BUILTIN_ROUNDULLK; break;
 168
 169         default:
 170           error_at (loc, "no matching fixed-point overload found for %qs",
 171                     "roundfx");
 172
 173           fold = error_mark_node;
 174           break;
 175         }
 176
 177       fold = targetm.builtin_decl (id, true);
 178
 179       if (fold != error_mark_node)
 180         fold = build_function_call_vec (loc, vNULL, fold, &args, NULL);
 181
 182       break; // roundfx
 183
 184     case AVR_BUILTIN_COUNTLSFX:
 185       if (args.length() != 1)
 186         {
 187           error_at (loc, "%qs expects 1 argument but %d given",
 188                     "countlsfx", (int) args.length());
 189
 190           fold = error_mark_node;
 191           break;
 192         }
 193
 194       type0 = TREE_TYPE (args[0]);
 195
 196       if (!FIXED_POINT_TYPE_P (type0))
 197         {
 198           error_at (loc, "%qs expects a fixed-point value as first argument",
 199                     "countlsfx");
 200
 201           fold = error_mark_node;
 202         }
 203
 204       switch (TYPE_MODE (type0))
 205         {
 206         case QQmode: id = AVR_BUILTIN_COUNTLSHR; break;
 207         case HQmode: id = AVR_BUILTIN_COUNTLSR; break;
 208         case SQmode: id = AVR_BUILTIN_COUNTLSLR; break;
 209         case DQmode: id = AVR_BUILTIN_COUNTLSLLR; break;
 210
 211         case UQQmode: id = AVR_BUILTIN_COUNTLSUHR; break;
 212         case UHQmode: id = AVR_BUILTIN_COUNTLSUR; break;
 213         case USQmode: id = AVR_BUILTIN_COUNTLSULR; break;
 214         case UDQmode: id = AVR_BUILTIN_COUNTLSULLR; break;
 215
 216         case HAmode: id = AVR_BUILTIN_COUNTLSHK; break;
 217         case SAmode: id = AVR_BUILTIN_COUNTLSK; break;
 218         case DAmode: id = AVR_BUILTIN_COUNTLSLK; break;
 219         case TAmode: id = AVR_BUILTIN_COUNTLSLLK; break;
 220
 221         case UHAmode: id = AVR_BUILTIN_COUNTLSUHK; break;
 222         case USAmode: id = AVR_BUILTIN_COUNTLSUK; break;
 223         case UDAmode: id = AVR_BUILTIN_COUNTLSULK; break;
 224         case UTAmode: id = AVR_BUILTIN_COUNTLSULLK; break;
 225
 226         default:
 227           error_at (loc, "no matching fixed-point overload found for %qs",
 228                     "countlsfx");
 229
 230           fold = error_mark_node;
 231           break;
 232         }
 233
 234       fold = targetm.builtin_decl (id, true);
 235
 236       if (fold != error_mark_node)
 237         fold = build_function_call_vec (loc, vNULL, fold, &args, NULL);
 238
 239       break; // countlsfx
 240     }
 241
 242   return fold;
 243 }
 244
 245
 246 /* Implement `REGISTER_TARGET_PRAGMAS'.  */
 247
 248 void
 249 avr_register_target_pragmas (void)
 250 {
 251   int i;
 252
 253   gcc_assert (ADDR_SPACE_GENERIC == ADDR_SPACE_RAM);
 254
 255   /* Register address spaces.  The order must be the same as in the respective
 256      enum from avr.h (or designated initializers must be used in avr.c).  */
 257
 258   for (i = 0; i < ADDR_SPACE_COUNT; i++)
 259     {
 260       gcc_assert (i == avr_addrspace[i].id);
 261
 262       if (!ADDR_SPACE_GENERIC_P (i))
 263         c_register_addr_space (avr_addrspace[i].name, avr_addrspace[i].id);
 264     }
 265
 266   targetm.resolve_overloaded_builtin = avr_resolve_overloaded_builtin;
 267 }
 268
 269
 270 /* Transform LO into uppercase and write the result to UP.
 271    You must provide enough space for UP.  Return UP.  */
 272
 273 static char*
 274 avr_toupper (char *up, const char *lo)
 275 {
 276   char *up0 = up;
 277
 278   for (; *lo; lo++, up++)
 279     *up = TOUPPER (*lo);
 280
 281   *up = '\0';
 282
 283   return up0;
 284 }
 285
 286 /* Worker function for TARGET_CPU_CPP_BUILTINS.  */
 287
 288 void
 289 avr_cpu_cpp_builtins (struct cpp_reader *pfile)
 290 {
 291   int i;
 292
 293   builtin_define_std ("AVR");
 294
 295   /* __AVR_DEVICE_NAME__ and  avr_mcu_types[].macro like __AVR_ATmega8__
 296          are defined by -D command option, see device-specs file.  */
 297
 298   if (avr_arch->macro)
 299     cpp_define_formatted (pfile, "__AVR_ARCH__=%s", avr_arch->macro);
 300   if (AVR_HAVE_RAMPD)    cpp_define (pfile, "__AVR_HAVE_RAMPD__");
 301   if (AVR_HAVE_RAMPX)    cpp_define (pfile, "__AVR_HAVE_RAMPX__");
 302   if (AVR_HAVE_RAMPY)    cpp_define (pfile, "__AVR_HAVE_RAMPY__");
 303   if (AVR_HAVE_RAMPZ)    cpp_define (pfile, "__AVR_HAVE_RAMPZ__");
 304   if (AVR_HAVE_ELPM)     cpp_define (pfile, "__AVR_HAVE_ELPM__");
 305   if (AVR_HAVE_ELPMX)    cpp_define (pfile, "__AVR_HAVE_ELPMX__");
 306   if (AVR_HAVE_MOVW)     cpp_define (pfile, "__AVR_HAVE_MOVW__");
 307   if (AVR_HAVE_LPMX)     cpp_define (pfile, "__AVR_HAVE_LPMX__");
 308
 309   if (avr_arch->asm_only)
 310     cpp_define (pfile, "__AVR_ASM_ONLY__");
 311   if (AVR_HAVE_MUL)
 312     {
 313       cpp_define (pfile, "__AVR_ENHANCED__");
 314       cpp_define (pfile, "__AVR_HAVE_MUL__");
 315     }
 316   if (avr_arch->have_jmp_call)
 317     {
 318       cpp_define (pfile, "__AVR_MEGA__");
 319       cpp_define (pfile, "__AVR_HAVE_JMP_CALL__");
 320     }
 321   if (AVR_XMEGA)
 322     cpp_define (pfile, "__AVR_XMEGA__");
 323
 324   if (AVR_TINY)
 325     {
 326       cpp_define (pfile, "__AVR_TINY__");
 327
 328       /* Define macro "__AVR_TINY_PM_BASE_ADDRESS__" with mapped program memory
 329          start address.  This macro shall be used where mapped program
 330          memory is accessed, eg. copying data section (__do_copy_data)
 331          contents to data memory region.
 332          NOTE:
 333          Program memory of AVR_TINY devices cannot be accessed directly,
 334          it has been mapped to the data memory.  For AVR_TINY devices
 335          (ATtiny4/5/9/10/20 and 40) mapped program memory starts at 0x4000. */
 336
 337       cpp_define (pfile, "__AVR_TINY_PM_BASE_ADDRESS__=0x4000");
 338     }
 339
 340   if (AVR_HAVE_EIJMP_EICALL)
 341     {
 342       cpp_define (pfile, "__AVR_HAVE_EIJMP_EICALL__");
 343       cpp_define (pfile, "__AVR_3_BYTE_PC__");
 344     }
 345   else
 346     {
 347       cpp_define (pfile, "__AVR_2_BYTE_PC__");
 348     }
 349
 350   if (AVR_HAVE_8BIT_SP)
 351     cpp_define (pfile, "__AVR_HAVE_8BIT_SP__");
 352   else
 353     cpp_define (pfile, "__AVR_HAVE_16BIT_SP__");
 354
 355   if (AVR_HAVE_SPH)
 356     cpp_define (pfile, "__AVR_HAVE_SPH__");
 357   else
 358     cpp_define (pfile, "__AVR_SP8__");
 359
 360   if (TARGET_NO_INTERRUPTS)
 361     cpp_define (pfile, "__NO_INTERRUPTS__");
 362
 363   if (TARGET_SKIP_BUG)
 364     {
 365       cpp_define (pfile, "__AVR_ERRATA_SKIP__");
 366
 367       if (AVR_HAVE_JMP_CALL)
 368         cpp_define (pfile, "__AVR_ERRATA_SKIP_JMP_CALL__");
 369     }
 370
 371   if (TARGET_RMW)
 372     cpp_define (pfile, "__AVR_ISA_RMW__");
 373
 374   cpp_define_formatted (pfile, "__AVR_SFR_OFFSET__=0x%x",
 375                         avr_arch->sfr_offset);
 376
 377 #ifdef WITH_AVRLIBC
 378   cpp_define (pfile, "__WITH_AVRLIBC__");
 379 #endif /* WITH_AVRLIBC */
 380
 381   /* Define builtin macros so that the user can easily query whether
 382      non-generic address spaces (and which) are supported or not.
 383      This is only supported for C.  For C++, a language extension is needed
 384      (as mentioned in ISO/IEC DTR 18037; Annex F.2) which is not
 385      implemented in GCC up to now.  */
 386
 387   if (lang_GNU_C ())
 388     {
 389       for (i = 0; i < ADDR_SPACE_COUNT; i++)
 390         if (!ADDR_SPACE_GENERIC_P (i)
 391             /* Only supply __FLASH<n> macro if the address space is reasonable
 392                for this target.  The address space qualifier itself is still
 393                supported, but using it will throw an error.  */
 394             && avr_addrspace[i].segment < avr_n_flash
 395             /* Only support __MEMX macro if we have LPM.  */
 396             && (AVR_HAVE_LPM || avr_addrspace[i].pointer_size <= 2))
 397
 398           {
 399             const char *name = avr_addrspace[i].name;
 400             char *Name = (char*) alloca (1 + strlen (name));
 401
 402             cpp_define (pfile, avr_toupper (Name, name));
 403           }
 404     }
 405
 406   /* Define builtin macros so that the user can easily query whether or
 407      not a specific builtin is available. */
 408
 409 #define DEF_BUILTIN(NAME, N_ARGS, TYPE, CODE, LIBNAME)  \
 410   cpp_define (pfile, "__BUILTIN_AVR_" #NAME);
 411 #include "builtins.def"
 412 #undef DEF_BUILTIN
 413
 414   /* Builtin macros for the __int24 and __uint24 type.  */
 415
 416   cpp_define_formatted (pfile, "__INT24_MAX__=8388607%s",
 417                         INT_TYPE_SIZE == 8 ? "LL" : "L");
 418   cpp_define (pfile, "__INT24_MIN__=(-__INT24_MAX__-1)");
 419   cpp_define_formatted (pfile, "__UINT24_MAX__=16777215%s",
 420                         INT_TYPE_SIZE == 8 ? "ULL" : "UL");
 421 }