gcc/config/avr/avr.h

   1 /* Definitions of target machine for GNU compiler,
   2    for ATMEL AVR at90s8515, ATmega103/103L, ATmega603/603L microcontrollers.
   3    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   4    2008, 2009 Free Software Foundation, Inc.
   5    Contributed by Denis Chertykov (chertykov@gmail.com)
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 3, or (at your option)
  12 any later version.
  13
  14 GCC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GCC; see the file COPYING3.  If not see
  21 <http://www.gnu.org/licenses/>.  */
  22
  23 /* Names to predefine in the preprocessor for this target machine.  */
  24
  25 struct base_arch_s {
  26   /* Assembler only.  */
  27   int asm_only;
  28
  29   /* Core have 'MUL*' instructions.  */
  30   int have_mul;
  31
  32   /* Core have 'CALL' and 'JMP' instructions.  */
  33   int have_jmp_call;
  34
  35   /* Core have 'MOVW' and 'LPM Rx,Z' instructions.  */
  36   int have_movw_lpmx;
  37
  38   /* Core have 'ELPM' instructions.  */
  39   int have_elpm;
  40
  41   /* Core have 'ELPM Rx,Z' instructions.  */
  42   int have_elpmx;
  43
  44   /* Core have 'EICALL' and 'EIJMP' instructions.  */
  45   int have_eijmp_eicall;
  46
  47   /* Reserved for xmega architecture.  */
  48   int reserved;
  49
  50   /* Reserved for xmega architecture.  */
  51   int reserved2;
  52
  53   /* Default start of data section address for architecture.  */
  54   int default_data_section_start;
  55
  56   const char *const macro;
  57
  58   /* Architecture name.  */
  59   const char *const arch_name;
  60 };
  61
  62 /* These names are used as the index into the avr_arch_types[] table
  63    above.  */
  64
  65 enum avr_arch
  66 {
  67   ARCH_UNKNOWN,
  68   ARCH_AVR1,
  69   ARCH_AVR2,
  70   ARCH_AVR25,
  71   ARCH_AVR3,
  72   ARCH_AVR31,
  73   ARCH_AVR35,
  74   ARCH_AVR4,
  75   ARCH_AVR5,
  76   ARCH_AVR51,
  77   ARCH_AVR6
  78 };
  79
  80 struct mcu_type_s {
  81   /* Device name.  */
  82   const char *const name;
  83
  84   /* Index in avr_arch_types[].  */
  85   int arch;
  86
  87   /* Must lie outside user's namespace.  NULL == no macro.  */
  88   const char *const macro;
  89
  90   /* Stack pointer have 8 bits width.  */
  91   int short_sp;
  92
  93   /* Start of data section.  */
  94   int data_section_start;
  95
  96   /* Name of device library.  */
  97   const char *const library_name;
  98 };
  99
 100 extern const struct base_arch_s *avr_current_arch;
 101 extern const struct mcu_type_s *avr_current_device;
 102 extern const struct mcu_type_s avr_mcu_types[];
 103 extern const struct base_arch_s avr_arch_types[];
 104
 105 #define TARGET_CPU_CPP_BUILTINS()               \
 106   do                                            \
 107     {                                           \
 108       builtin_define_std ("AVR");               \
 109       if (avr_current_arch->macro)              \
 110         builtin_define (avr_current_arch->macro);       \
 111       if (avr_extra_arch_macro)                 \
 112         builtin_define (avr_extra_arch_macro);  \
 113       if (avr_current_arch->have_elpm)          \
 114         builtin_define ("__AVR_HAVE_RAMPZ__");  \
 115       if (avr_current_arch->have_elpm)          \
 116         builtin_define ("__AVR_HAVE_ELPM__");   \
 117       if (avr_current_arch->have_elpmx)         \
 118         builtin_define ("__AVR_HAVE_ELPMX__");  \
 119       if (avr_current_arch->have_movw_lpmx)     \
 120         {                                       \
 121           builtin_define ("__AVR_HAVE_MOVW__"); \
 122           builtin_define ("__AVR_HAVE_LPMX__"); \
 123         }                                       \
 124       if (avr_current_arch->asm_only)           \
 125         builtin_define ("__AVR_ASM_ONLY__");    \
 126       if (avr_current_arch->have_mul)           \
 127         {                                       \
 128           builtin_define ("__AVR_ENHANCED__");  \
 129           builtin_define ("__AVR_HAVE_MUL__");  \
 130         }                                       \
 131       if (avr_current_arch->have_jmp_call)      \
 132         {                                       \
 133           builtin_define ("__AVR_MEGA__");      \
 134           builtin_define ("__AVR_HAVE_JMP_CALL__");     \
 135         }                                       \
 136       if (avr_current_arch->have_eijmp_eicall)  \
 137         {                                       \
 138           builtin_define ("__AVR_HAVE_EIJMP_EICALL__"); \
 139           builtin_define ("__AVR_3_BYTE_PC__"); \
 140         }                                       \
 141       else                                      \
 142         {                                       \
 143           builtin_define ("__AVR_2_BYTE_PC__"); \
 144         }                                       \
 145       if (TARGET_NO_INTERRUPTS)                 \
 146         builtin_define ("__NO_INTERRUPTS__");   \
 147     }                                           \
 148   while (0)
 149
 150 extern const char *avr_extra_arch_macro;
 151
 152 #if !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS)
 153 extern GTY(()) section *progmem_section;
 154 #endif
 155
 156 #define AVR_HAVE_JMP_CALL (avr_current_arch->have_jmp_call && !TARGET_SHORT_CALLS)
 157 #define AVR_HAVE_MUL (avr_current_arch->have_mul)
 158 #define AVR_HAVE_MOVW (avr_current_arch->have_movw_lpmx)
 159 #define AVR_HAVE_LPMX (avr_current_arch->have_movw_lpmx)
 160 #define AVR_HAVE_RAMPZ (avr_current_arch->have_elpm)
 161 #define AVR_HAVE_EIJMP_EICALL (avr_current_arch->have_eijmp_eicall)
 162
 163 #define AVR_2_BYTE_PC (!AVR_HAVE_EIJMP_EICALL)
 164 #define AVR_3_BYTE_PC (AVR_HAVE_EIJMP_EICALL)
 165
 166 #define TARGET_VERSION fprintf (stderr, " (GNU assembler syntax)");
 167
 168 #define OVERRIDE_OPTIONS avr_override_options ()
 169
 170 #define CAN_DEBUG_WITHOUT_FP
 171
 172 #define BITS_BIG_ENDIAN 0
 173 #define BYTES_BIG_ENDIAN 0
 174 #define WORDS_BIG_ENDIAN 0
 175
 176 #ifdef IN_LIBGCC2
 177 /* This is to get correct SI and DI modes in libgcc2.c (32 and 64 bits).  */
 178 #define UNITS_PER_WORD 4
 179 #else
 180 /* Width of a word, in units (bytes).  */
 181 #define UNITS_PER_WORD 1
 182 #endif
 183
 184 #define POINTER_SIZE 16
 185
 186
 187 /* Maximum sized of reasonable data type
 188    DImode or Dfmode ...  */
 189 #define MAX_FIXED_MODE_SIZE 32
 190
 191 #define PARM_BOUNDARY 8
 192
 193 #define FUNCTION_BOUNDARY 8
 194
 195 #define EMPTY_FIELD_BOUNDARY 8
 196
 197 /* No data type wants to be aligned rounder than this.  */
 198 #define BIGGEST_ALIGNMENT 8
 199
 200 #define MAX_OFILE_ALIGNMENT (32768 * 8)
 201
 202 #define TARGET_VTABLE_ENTRY_ALIGN 8
 203
 204 #define STRICT_ALIGNMENT 0
 205
 206 #define INT_TYPE_SIZE (TARGET_INT8 ? 8 : 16)
 207 #define SHORT_TYPE_SIZE (INT_TYPE_SIZE == 8 ? INT_TYPE_SIZE : 16)
 208 #define LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 16 : 32)
 209 #define LONG_LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 32 : 64)
 210 #define FLOAT_TYPE_SIZE 32
 211 #define DOUBLE_TYPE_SIZE 32
 212 #define LONG_DOUBLE_TYPE_SIZE 32
 213
 214 #define DEFAULT_SIGNED_CHAR 1
 215
 216 #define SIZE_TYPE (INT_TYPE_SIZE == 8 ? "long unsigned int" : "unsigned int")
 217 #define PTRDIFF_TYPE (INT_TYPE_SIZE == 8 ? "long int" :"int")
 218
 219 #define WCHAR_TYPE_SIZE 16
 220
 221 #define FIRST_PSEUDO_REGISTER 36
 222
 223 #define FIXED_REGISTERS {\
 224   1,1,/* r0 r1 */\
 225   0,0,/* r2 r3 */\
 226   0,0,/* r4 r5 */\
 227   0,0,/* r6 r7 */\
 228   0,0,/* r8 r9 */\
 229   0,0,/* r10 r11 */\
 230   0,0,/* r12 r13 */\
 231   0,0,/* r14 r15 */\
 232   0,0,/* r16 r17 */\
 233   0,0,/* r18 r19 */\
 234   0,0,/* r20 r21 */\
 235   0,0,/* r22 r23 */\
 236   0,0,/* r24 r25 */\
 237   0,0,/* r26 r27 */\
 238   0,0,/* r28 r29 */\
 239   0,0,/* r30 r31 */\
 240   1,1,/*  STACK */\
 241   1,1 /* arg pointer */  }
 242
 243 #define CALL_USED_REGISTERS {                   \
 244   1,1,/* r0 r1 */                               \
 245     0,0,/* r2 r3 */                             \
 246     0,0,/* r4 r5 */                             \
 247     0,0,/* r6 r7 */                             \
 248     0,0,/* r8 r9 */                             \
 249     0,0,/* r10 r11 */                           \
 250     0,0,/* r12 r13 */                           \
 251     0,0,/* r14 r15 */                           \
 252     0,0,/* r16 r17 */                           \
 253     1,1,/* r18 r19 */                           \
 254     1,1,/* r20 r21 */                           \
 255     1,1,/* r22 r23 */                           \
 256     1,1,/* r24 r25 */                           \
 257     1,1,/* r26 r27 */                           \
 258     0,0,/* r28 r29 */                           \
 259     1,1,/* r30 r31 */                           \
 260     1,1,/*  STACK */                            \
 261     1,1 /* arg pointer */  }
 262
 263 #define REG_ALLOC_ORDER {                       \
 264     24,25,                                      \
 265     18,19,                                      \
 266     20,21,                                      \
 267     22,23,                                      \
 268     30,31,                                      \
 269     26,27,                                      \
 270     28,29,                                      \
 271     17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,    \
 272     0,1,                                        \
 273     32,33,34,35                                 \
 274     }
 275
 276 #define ORDER_REGS_FOR_LOCAL_ALLOC order_regs_for_local_alloc ()
 277
 278
 279 #define HARD_REGNO_NREGS(REGNO, MODE) ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
 280
 281 #define HARD_REGNO_MODE_OK(REGNO, MODE) avr_hard_regno_mode_ok(REGNO, MODE)
 282
 283 #define MODES_TIEABLE_P(MODE1, MODE2) 1
 284
 285 enum reg_class {
 286   NO_REGS,
 287   R0_REG,                       /* r0 */
 288   POINTER_X_REGS,               /* r26 - r27 */
 289   POINTER_Y_REGS,               /* r28 - r29 */
 290   POINTER_Z_REGS,               /* r30 - r31 */
 291   STACK_REG,                    /* STACK */
 292   BASE_POINTER_REGS,            /* r28 - r31 */
 293   POINTER_REGS,                 /* r26 - r31 */
 294   ADDW_REGS,                    /* r24 - r31 */
 295   SIMPLE_LD_REGS,               /* r16 - r23 */
 296   LD_REGS,                      /* r16 - r31 */
 297   NO_LD_REGS,                   /* r0 - r15 */
 298   GENERAL_REGS,                 /* r0 - r31 */
 299   ALL_REGS, LIM_REG_CLASSES
 300 };
 301
 302
 303 #define N_REG_CLASSES (int)LIM_REG_CLASSES
 304
 305 #define REG_CLASS_NAMES {                                       \
 306                  "NO_REGS",                                     \
 307                    "R0_REG",    /* r0 */                        \
 308                    "POINTER_X_REGS", /* r26 - r27 */            \
 309                    "POINTER_Y_REGS", /* r28 - r29 */            \
 310                    "POINTER_Z_REGS", /* r30 - r31 */            \
 311                    "STACK_REG", /* STACK */                     \
 312                    "BASE_POINTER_REGS", /* r28 - r31 */         \
 313                    "POINTER_REGS", /* r26 - r31 */              \
 314                    "ADDW_REGS", /* r24 - r31 */                 \
 315                    "SIMPLE_LD_REGS", /* r16 - r23 */            \
 316                    "LD_REGS",   /* r16 - r31 */                 \
 317                    "NO_LD_REGS", /* r0 - r15 */                 \
 318                    "GENERAL_REGS", /* r0 - r31 */               \
 319                    "ALL_REGS" }
 320
 321 #define REG_CLASS_CONTENTS {                                            \
 322   {0x00000000,0x00000000},      /* NO_REGS */                           \
 323   {0x00000001,0x00000000},      /* R0_REG */                            \
 324   {3 << REG_X,0x00000000},      /* POINTER_X_REGS, r26 - r27 */         \
 325   {3 << REG_Y,0x00000000},      /* POINTER_Y_REGS, r28 - r29 */         \
 326   {3 << REG_Z,0x00000000},      /* POINTER_Z_REGS, r30 - r31 */         \
 327   {0x00000000,0x00000003},      /* STACK_REG, STACK */                  \
 328   {(3 << REG_Y) | (3 << REG_Z),                                         \
 329      0x00000000},               /* BASE_POINTER_REGS, r28 - r31 */      \
 330   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z),                          \
 331      0x00000000},               /* POINTER_REGS, r26 - r31 */           \
 332   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z) | (3 << REG_W),           \
 333      0x00000000},               /* ADDW_REGS, r24 - r31 */              \
 334   {0x00ff0000,0x00000000},      /* SIMPLE_LD_REGS r16 - r23 */          \
 335   {(3 << REG_X)|(3 << REG_Y)|(3 << REG_Z)|(3 << REG_W)|(0xff << 16),    \
 336      0x00000000},       /* LD_REGS, r16 - r31 */                        \
 337   {0x0000ffff,0x00000000},      /* NO_LD_REGS  r0 - r15 */              \
 338   {0xffffffff,0x00000000},      /* GENERAL_REGS, r0 - r31 */            \
 339   {0xffffffff,0x00000003}       /* ALL_REGS */                          \
 340 }
 341
 342 #define REGNO_REG_CLASS(R) avr_regno_reg_class(R)
 343
 344 /* The following macro defines cover classes for Integrated Register
 345    Allocator.  Cover classes is a set of non-intersected register
 346    classes covering all hard registers used for register allocation
 347    purpose.  Any move between two registers of a cover class should be
 348    cheaper than load or store of the registers.  The macro value is
 349    array of register classes with LIM_REG_CLASSES used as the end
 350    marker.  */
 351
 352 #define IRA_COVER_CLASSES               \
 353 {                                       \
 354   GENERAL_REGS, LIM_REG_CLASSES         \
 355 }
 356
 357 #define BASE_REG_CLASS (reload_completed ? BASE_POINTER_REGS : POINTER_REGS)
 358
 359 #define INDEX_REG_CLASS NO_REGS
 360
 361 #define REGNO_OK_FOR_BASE_P(r) (((r) < FIRST_PSEUDO_REGISTER            \
 362                                  && ((r) == REG_X                       \
 363                                      || (r) == REG_Y                    \
 364                                      || (r) == REG_Z                    \
 365                                      || (r) == ARG_POINTER_REGNUM))     \
 366                                 || (reg_renumber                        \
 367                                     && (reg_renumber[r] == REG_X        \
 368                                         || reg_renumber[r] == REG_Y     \
 369                                         || reg_renumber[r] == REG_Z     \
 370                                         || (reg_renumber[r]             \
 371                                             == ARG_POINTER_REGNUM))))
 372
 373 #define REGNO_OK_FOR_INDEX_P(NUM) 0
 374
 375 #define PREFERRED_RELOAD_CLASS(X, CLASS) preferred_reload_class(X,CLASS)
 376
 377 #define SMALL_REGISTER_CLASSES 1
 378
 379 #define CLASS_LIKELY_SPILLED_P(c) class_likely_spilled_p(c)
 380
 381 #define CLASS_MAX_NREGS(CLASS, MODE)   class_max_nregs (CLASS, MODE)
 382
 383 #define STACK_PUSH_CODE POST_DEC
 384
 385 #define STACK_GROWS_DOWNWARD
 386
 387 #define STARTING_FRAME_OFFSET 1
 388
 389 #define STACK_POINTER_OFFSET 1
 390
 391 #define FIRST_PARM_OFFSET(FUNDECL) 0
 392
 393 #define STACK_BOUNDARY 8
 394
 395 #define STACK_POINTER_REGNUM 32
 396
 397 #define FRAME_POINTER_REGNUM REG_Y
 398
 399 #define ARG_POINTER_REGNUM 34
 400
 401 #define STATIC_CHAIN_REGNUM 2
 402
 403 #define FRAME_POINTER_REQUIRED avr_frame_pointer_required_p()
 404
 405 /* Offset from the frame pointer register value to the top of the stack.  */
 406 #define FRAME_POINTER_CFA_OFFSET(FNDECL) 0
 407
 408 #define ELIMINABLE_REGS {                                       \
 409       {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},               \
 410         {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}            \
 411        ,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}}
 412
 413 #define CAN_ELIMINATE(FROM, TO) avr_can_eliminate (FROM, TO)
 414
 415 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                    \
 416   OFFSET = avr_initial_elimination_offset (FROM, TO)
 417
 418 #define RETURN_ADDR_RTX(count, x) \
 419   gen_rtx_MEM (Pmode, memory_address (Pmode, plus_constant (tem, 1)))
 420
 421 /* Don't use Push rounding. expr.c: emit_single_push_insn is broken
 422    for POST_DEC targets (PR27386).  */
 423 /*#define PUSH_ROUNDING(NPUSHED) (NPUSHED)*/
 424
 425 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
 426
 427 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) (function_arg (&(CUM), MODE, TYPE, NAMED))
 428
 429 typedef struct avr_args {
 430   int nregs;                    /* # registers available for passing */
 431   int regno;                    /* next available register number */
 432 } CUMULATIVE_ARGS;
 433
 434 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
 435   init_cumulative_args (&(CUM), FNTYPE, LIBNAME, FNDECL)
 436
 437 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)    \
 438   (function_arg_advance (&CUM, MODE, TYPE, NAMED))
 439
 440 #define FUNCTION_ARG_REGNO_P(r) function_arg_regno_p(r)
 441
 442 extern int avr_reg_order[];
 443
 444 #define RET_REGISTER avr_ret_register ()
 445
 446 #define LIBCALL_VALUE(MODE)  avr_libcall_value (MODE)
 447
 448 #define FUNCTION_VALUE_REGNO_P(N) ((int) (N) == RET_REGISTER)
 449
 450 #define DEFAULT_PCC_STRUCT_RETURN 0
 451
 452 #define EPILOGUE_USES(REGNO) avr_epilogue_uses(REGNO)
 453
 454 #define HAVE_POST_INCREMENT 1
 455 #define HAVE_PRE_DECREMENT 1
 456
 457 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
 458
 459 #define MAX_REGS_PER_ADDRESS 1
 460
 461 #define REG_OK_FOR_BASE_NOSTRICT_P(X) \
 462   (REGNO (X) >= FIRST_PSEUDO_REGISTER || REG_OK_FOR_BASE_STRICT_P(X))
 463
 464 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
 465
 466 #ifdef REG_OK_STRICT
 467 #  define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P (X)
 468 #else
 469 #  define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NOSTRICT_P (X)
 470 #endif
 471
 472 #define REG_OK_FOR_INDEX_P(X) 0
 473
 474 #define XEXP_(X,Y) (X)
 475
 476 /* LEGITIMIZE_RELOAD_ADDRESS will allow register R26/27 to be used, where it
 477    is no worse than normal base pointers R28/29 and R30/31. For example:
 478    If base offset is greater than 63 bytes or for R++ or --R addressing.  */
 479
 480 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN)    \
 481 do {                                                                        \
 482   if (1&&(GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC))     \
 483     {                                                                       \
 484       push_reload (XEXP (X,0), XEXP (X,0), &XEXP (X,0), &XEXP (X,0),        \
 485                    POINTER_REGS, GET_MODE (X),GET_MODE (X) , 0, 0,          \
 486                    OPNUM, RELOAD_OTHER);                                    \
 487       goto WIN;                                                             \
 488     }                                                                       \
 489   if (GET_CODE (X) == PLUS                                                  \
 490       && REG_P (XEXP (X, 0))                                                \
 491       && reg_equiv_constant[REGNO (XEXP (X, 0))] == 0                       \
 492       && GET_CODE (XEXP (X, 1)) == CONST_INT                                \
 493       && INTVAL (XEXP (X, 1)) >= 1)                                         \
 494     {                                                                       \
 495       int fit = INTVAL (XEXP (X, 1)) <= (64 - GET_MODE_SIZE (MODE));        \
 496       if (fit)                                                              \
 497         {                                                                   \
 498           if (reg_equiv_address[REGNO (XEXP (X, 0))] != 0)                  \
 499             {                                                               \
 500               int regno = REGNO (XEXP (X, 0));                              \
 501               rtx mem = make_memloc (X, regno);                             \
 502               push_reload (XEXP (mem,0), NULL, &XEXP (mem,0), NULL,         \
 503                            POINTER_REGS, Pmode, VOIDmode, 0, 0,             \
 504                            1, ADDR_TYPE (TYPE));                            \
 505               push_reload (mem, NULL_RTX, &XEXP (X, 0), NULL,               \
 506                            BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
 507                            OPNUM, TYPE);                                    \
 508               goto WIN;                                                     \
 509             }                                                               \
 510         }                                                                   \
 511       else if (! (frame_pointer_needed && XEXP (X,0) == frame_pointer_rtx)) \
 512         {                                                                   \
 513           push_reload (X, NULL_RTX, &X, NULL,                               \
 514                        POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0,          \
 515                        OPNUM, TYPE);                                        \
 516           goto WIN;                                                         \
 517         }                                                                   \
 518     }                                                                       \
 519 } while(0)
 520
 521 #define LEGITIMATE_CONSTANT_P(X) 1
 522
 523 #define REGISTER_MOVE_COST(MODE, FROM, TO) ((FROM) == STACK_REG ? 6 \
 524                                             : (TO) == STACK_REG ? 12 \
 525                                             : 2)
 526
 527 #define MEMORY_MOVE_COST(MODE,CLASS,IN) ((MODE)==QImode ? 2 :   \
 528                                          (MODE)==HImode ? 4 :   \
 529                                          (MODE)==SImode ? 8 :   \
 530                                          (MODE)==SFmode ? 8 : 16)
 531
 532 #define BRANCH_COST(speed_p, predictable_p) 0
 533
 534 #define SLOW_BYTE_ACCESS 0
 535
 536 #define NO_FUNCTION_CSE
 537
 538 #define TEXT_SECTION_ASM_OP "\t.text"
 539
 540 #define DATA_SECTION_ASM_OP "\t.data"
 541
 542 #define BSS_SECTION_ASM_OP "\t.section .bss"
 543
 544 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
 545    There are no shared libraries on this target, and these sections are
 546    placed in the read-only program memory, so they are not writable.  */
 547
 548 #undef CTORS_SECTION_ASM_OP
 549 #define CTORS_SECTION_ASM_OP "\t.section .ctors,\"a\",@progbits"
 550
 551 #undef DTORS_SECTION_ASM_OP
 552 #define DTORS_SECTION_ASM_OP "\t.section .dtors,\"a\",@progbits"
 553
 554 #define TARGET_ASM_CONSTRUCTOR avr_asm_out_ctor
 555
 556 #define TARGET_ASM_DESTRUCTOR avr_asm_out_dtor
 557
 558 #define SUPPORTS_INIT_PRIORITY 0
 559
 560 #define JUMP_TABLES_IN_TEXT_SECTION 0
 561
 562 #define ASM_COMMENT_START " ; "
 563
 564 #define ASM_APP_ON "/* #APP */\n"
 565
 566 #define ASM_APP_OFF "/* #NOAPP */\n"
 567
 568 /* Switch into a generic section.  */
 569 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
 570 #define TARGET_ASM_INIT_SECTIONS avr_asm_init_sections
 571
 572 #define ASM_OUTPUT_ASCII(FILE, P, SIZE)  gas_output_ascii (FILE,P,SIZE)
 573
 574 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C, STR) ((C) == '\n' || ((C) == '$'))
 575
 576 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)                     \
 577 do {                                                                       \
 578      fputs ("\t.comm ", (STREAM));                                         \
 579      assemble_name ((STREAM), (NAME));                                     \
 580      fprintf ((STREAM), ",%lu,1\n", (unsigned long)(SIZE));                \
 581 } while (0)
 582
 583 #define ASM_OUTPUT_BSS(FILE, DECL, NAME, SIZE, ROUNDED)                 \
 584   asm_output_bss ((FILE), (DECL), (NAME), (SIZE), (ROUNDED))
 585
 586 #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED)                   \
 587 do {                                                                    \
 588      fputs ("\t.lcomm ", (STREAM));                                     \
 589      assemble_name ((STREAM), (NAME));                                  \
 590      fprintf ((STREAM), ",%d\n", (int)(SIZE));                          \
 591 } while (0)
 592
 593 #undef TYPE_ASM_OP
 594 #undef SIZE_ASM_OP
 595 #undef WEAK_ASM_OP
 596 #define TYPE_ASM_OP     "\t.type\t"
 597 #define SIZE_ASM_OP     "\t.size\t"
 598 #define WEAK_ASM_OP     "\t.weak\t"
 599 /* Define the strings used for the special svr4 .type and .size directives.
 600    These strings generally do not vary from one system running svr4 to
 601    another, but if a given system (e.g. m88k running svr) needs to use
 602    different pseudo-op names for these, they may be overridden in the
 603    file which includes this one.  */
 604
 605
 606 #undef TYPE_OPERAND_FMT
 607 #define TYPE_OPERAND_FMT        "@%s"
 608 /* The following macro defines the format used to output the second
 609    operand of the .type assembler directive.  Different svr4 assemblers
 610    expect various different forms for this operand.  The one given here
 611    is just a default.  You may need to override it in your machine-
 612    specific tm.h file (depending upon the particulars of your assembler).  */
 613
 614 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 615 avr_asm_declare_function_name ((FILE), (NAME), (DECL))
 616
 617 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)                    \
 618   do {                                                                  \
 619     if (!flag_inhibit_size_directive)                                   \
 620       ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                           \
 621   } while (0)
 622
 623 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 624 do {                                                                    \
 625   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");                     \
 626   size_directive_output = 0;                                            \
 627   if (!flag_inhibit_size_directive && DECL_SIZE (DECL))                 \
 628     {                                                                   \
 629       size_directive_output = 1;                                        \
 630       ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME,                            \
 631                                  int_size_in_bytes (TREE_TYPE (DECL))); \
 632     }                                                                   \
 633   ASM_OUTPUT_LABEL(FILE, NAME);                                         \
 634 } while (0)
 635
 636 #undef ASM_FINISH_DECLARE_OBJECT
 637 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)         \
 638 do {                                                                     \
 639      const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);             \
 640      HOST_WIDE_INT size;                                                 \
 641      if (!flag_inhibit_size_directive && DECL_SIZE (DECL)                \
 642          && ! AT_END && TOP_LEVEL                                        \
 643          && DECL_INITIAL (DECL) == error_mark_node                       \
 644          && !size_directive_output)                                      \
 645        {                                                                 \
 646          size_directive_output = 1;                                      \
 647          size = int_size_in_bytes (TREE_TYPE (DECL));                    \
 648          ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size);                   \
 649        }                                                                 \
 650    } while (0)
 651
 652
 653 #define ESCAPES \
 654 "\1\1\1\1\1\1\1\1btn\1fr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 655 \0\0\"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 656 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\\\0\0\0\
 657 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\
 658 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 659 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 660 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 661 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1"
 662 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
 663    ASM_OUTPUT_LIMITED_STRING macros.  Each byte in the table
 664    corresponds to a particular byte value [0..255].  For any
 665    given byte value, if the value in the corresponding table
 666    position is zero, the given character can be output directly.
 667    If the table value is 1, the byte must be output as a \ooo
 668    octal escape.  If the tables value is anything else, then the
 669    byte value should be output as a \ followed by the value
 670    in the table.  Note that we can use standard UN*X escape
 671    sequences for many control characters, but we don't use
 672    \a to represent BEL because some svr4 assemblers (e.g. on
 673    the i386) don't know about that.  Also, we don't use \v
 674    since some versions of gas, such as 2.2 did not accept it.  */
 675
 676 #define STRING_LIMIT    ((unsigned) 64)
 677 #define STRING_ASM_OP   "\t.string\t"
 678 /* Some svr4 assemblers have a limit on the number of characters which
 679    can appear in the operand of a .string directive.  If your assembler
 680    has such a limitation, you should define STRING_LIMIT to reflect that
 681    limit.  Note that at least some svr4 assemblers have a limit on the
 682    actual number of bytes in the double-quoted string, and that they
 683    count each character in an escape sequence as one byte.  Thus, an
 684    escape sequence like \377 would count as four bytes.
 685
 686    If your target assembler doesn't support the .string directive, you
 687    should define this to zero.  */
 688
 689 /* Globalizing directive for a label.  */
 690 #define GLOBAL_ASM_OP ".global\t"
 691
 692 #define SET_ASM_OP      "\t.set\t"
 693
 694 #define ASM_WEAKEN_LABEL(FILE, NAME)    \
 695   do                                    \
 696     {                                   \
 697       fputs ("\t.weak\t", (FILE));      \
 698       assemble_name ((FILE), (NAME));   \
 699       fputc ('\n', (FILE));             \
 700     }                                   \
 701   while (0)
 702
 703 #define SUPPORTS_WEAK 1
 704
 705 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)        \
 706 sprintf (STRING, "*.%s%lu", PREFIX, (unsigned long)(NUM))
 707
 708 #define HAS_INIT_SECTION 1
 709
 710 #define REGISTER_NAMES {                                \
 711   "r0","r1","r2","r3","r4","r5","r6","r7",              \
 712     "r8","r9","r10","r11","r12","r13","r14","r15",      \
 713     "r16","r17","r18","r19","r20","r21","r22","r23",    \
 714     "r24","r25","r26","r27","r28","r29","r30","r31",    \
 715     "__SP_L__","__SP_H__","argL","argH"}
 716
 717 #define FINAL_PRESCAN_INSN(insn, operand, nop) final_prescan_insn (insn, operand,nop)
 718
 719 #define PRINT_OPERAND(STREAM, X, CODE) print_operand (STREAM, X, CODE)
 720
 721 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '~' || (CODE) == '!')
 722
 723 #define PRINT_OPERAND_ADDRESS(STREAM, X) print_operand_address(STREAM, X)
 724
 725 #define USER_LABEL_PREFIX ""
 726
 727 #define ASSEMBLER_DIALECT AVR_HAVE_MOVW
 728
 729 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO)      \
 730 {                                               \
 731   gcc_assert (REGNO < 32);                      \
 732   fprintf (STREAM, "\tpush\tr%d", REGNO);       \
 733 }
 734
 735 #define ASM_OUTPUT_REG_POP(STREAM, REGNO)       \
 736 {                                               \
 737   gcc_assert (REGNO < 32);                      \
 738   fprintf (STREAM, "\tpop\tr%d", REGNO);        \
 739 }
 740
 741 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)          \
 742   avr_output_addr_vec_elt(STREAM, VALUE)
 743
 744 #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) \
 745   (switch_to_section (progmem_section), \
 746    (*targetm.asm_out.internal_label) (STREAM, PREFIX, NUM))
 747
 748 #define ASM_OUTPUT_SKIP(STREAM, N)              \
 749 fprintf (STREAM, "\t.skip %lu,0\n", (unsigned long)(N))
 750
 751 #define ASM_OUTPUT_ALIGN(STREAM, POWER)                 \
 752   do {                                                  \
 753       if ((POWER) > 1)                                  \
 754           fprintf (STREAM, "\t.p2align\t%d\n", POWER);  \
 755   } while (0)
 756
 757 #define CASE_VECTOR_MODE HImode
 758
 759 #undef WORD_REGISTER_OPERATIONS
 760
 761 #define MOVE_MAX 4
 762
 763 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
 764
 765 #define Pmode HImode
 766
 767 #define FUNCTION_MODE HImode
 768
 769 #define DOLLARS_IN_IDENTIFIERS 0
 770
 771 #define NO_DOLLAR_IN_LABEL 1
 772
 773 #define TRAMPOLINE_TEMPLATE(FILE) \
 774   internal_error ("trampolines not supported")
 775
 776 #define TRAMPOLINE_SIZE 4
 777
 778 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)                             \
 779 {                                                                             \
 780   emit_move_insn (gen_rtx_MEM (HImode, plus_constant ((TRAMP), 2)), CXT);    \
 781   emit_move_insn (gen_rtx_MEM (HImode, plus_constant ((TRAMP), 6)), FNADDR); \
 782 }
 783 /* Store in cc_status the expressions
 784    that the condition codes will describe
 785    after execution of an instruction whose pattern is EXP.
 786    Do not alter them if the instruction would not alter the cc's.  */
 787
 788 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
 789
 790 /* The add insns don't set overflow in a usable way.  */
 791 #define CC_OVERFLOW_UNUSABLE 01000
 792 /* The mov,and,or,xor insns don't set carry.  That's ok though as the
 793    Z bit is all we need when doing unsigned comparisons on the result of
 794    these insns (since they're always with 0).  However, conditions.h has
 795    CC_NO_OVERFLOW defined for this purpose.  Rename it to something more
 796    understandable.  */
 797 #define CC_NO_CARRY CC_NO_OVERFLOW
 798
 799
 800 /* Output assembler code to FILE to increment profiler label # LABELNO
 801    for profiling a function entry.  */
 802
 803 #define FUNCTION_PROFILER(FILE, LABELNO)  \
 804   fprintf (FILE, "/* profiler %d */", (LABELNO))
 805
 806 #define ADJUST_INSN_LENGTH(INSN, LENGTH) (LENGTH =\
 807                                           adjust_insn_length (INSN, LENGTH))
 808
 809 extern const char *avr_device_to_arch (int argc, const char **argv);
 810 extern const char *avr_device_to_data_start (int argc, const char **argv);
 811 extern const char *avr_device_to_startfiles (int argc, const char **argv);
 812 extern const char *avr_device_to_devicelib (int argc, const char **argv);
 813
 814 #define EXTRA_SPEC_FUNCTIONS \
 815   { "device_to_arch", avr_device_to_arch }, \
 816   { "device_to_data_start", avr_device_to_data_start }, \
 817   { "device_to_startfile", avr_device_to_startfiles }, \
 818   { "device_to_devicelib", avr_device_to_devicelib },
 819
 820 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE}"
 821
 822 #define CC1_SPEC "%{profile:-p}"
 823
 824 #define CC1PLUS_SPEC "%{!frtti:-fno-rtti} \
 825     %{!fenforce-eh-specs:-fno-enforce-eh-specs} \
 826     %{!fexceptions:-fno-exceptions}"
 827 /* A C string constant that tells the GCC driver program options to
 828    pass to `cc1plus'.  */
 829
 830 #define ASM_SPEC "%{mmcu=avr25:-mmcu=avr2;mmcu=avr35:-mmcu=avr3;mmcu=avr31:-mmcu=avr3;mmcu=avr51:-mmcu=avr5;\
 831 mmcu=*:-mmcu=%*}"
 832
 833 #define LINK_SPEC "\
 834 %{mrelax:--relax\
 835          %{mpmem-wrap-around:%{mmcu=at90usb8*:--pmem-wrap-around=8k}\
 836                              %{mmcu=atmega16*:--pmem-wrap-around=16k}\
 837                              %{mmcu=atmega32*|\
 838                                mmcu=at90can32*:--pmem-wrap-around=32k}\
 839                              %{mmcu=atmega64*|\
 840                                mmcu=at90can64*|\
 841                                mmcu=at90usb64*:--pmem-wrap-around=64k}}}\
 842 %:device_to_arch(%{mmcu=*:%*})\
 843 %:device_to_data_start(%{mmcu=*:%*})"
 844
 845 #define LIB_SPEC \
 846   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lc }}}}}"
 847
 848 #define LIBSTDCXX "-lgcc"
 849 /* No libstdc++ for now.  Empty string doesn't work.  */
 850
 851 #define LIBGCC_SPEC \
 852   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lgcc }}}}}"
 853
 854 #define STARTFILE_SPEC "%:device_to_startfile(%{mmcu=*:%*})"
 855
 856 #define ENDFILE_SPEC ""
 857
 858 /* This is the default without any -mmcu=* option (AT90S*).  */
 859 #define MULTILIB_DEFAULTS { "mmcu=avr2" }
 860
 861 /* This is undefined macro for collect2 disabling */
 862 #define LINKER_NAME "ld"
 863
 864 #define TEST_HARD_REG_CLASS(CLASS, REGNO) \
 865   TEST_HARD_REG_BIT (reg_class_contents[ (int) (CLASS)], REGNO)
 866
 867 /* Note that the other files fail to use these
 868    in some of the places where they should.  */
 869
 870 #if defined(__STDC__) || defined(ALMOST_STDC)
 871 #define AS2(a,b,c) #a " " #b "," #c
 872 #define AS2C(b,c) " " #b "," #c
 873 #define AS3(a,b,c,d) #a " " #b "," #c "," #d
 874 #define AS1(a,b) #a " " #b
 875 #else
 876 #define AS1(a,b) "a     b"
 877 #define AS2(a,b,c) "a   b,c"
 878 #define AS2C(b,c) " b,c"
 879 #define AS3(a,b,c,d) "a b,c,d"
 880 #endif
 881 #define OUT_AS1(a,b) output_asm_insn (AS1(a,b), operands)
 882 #define OUT_AS2(a,b,c) output_asm_insn (AS2(a,b,c), operands)
 883 #define CR_TAB "\n\t"
 884
 885 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 886
 887 #define DWARF2_DEBUGGING_INFO 1
 888
 889 #define DWARF2_ADDR_SIZE 4
 890
 891 #define OBJECT_FORMAT_ELF
 892
 893 #define HARD_REGNO_RENAME_OK(OLD_REG, NEW_REG) \
 894   avr_hard_regno_rename_ok (OLD_REG, NEW_REG)
 895
 896 /* A C structure for machine-specific, per-function data.
 897    This is added to the cfun structure.  */
 898 struct GTY(()) machine_function
 899 {
 900   /* 'true' - if the current function is a leaf function.  */
 901   int is_leaf;
 902
 903   /* 'true' - if current function is a naked function.  */
 904   int is_naked;
 905
 906   /* 'true' - if current function is an interrupt function
 907      as specified by the "interrupt" attribute.  */
 908   int is_interrupt;
 909
 910   /* 'true' - if current function is a signal function
 911      as specified by the "signal" attribute.  */
 912   int is_signal;
 913
 914   /* 'true' - if current function is a 'task' function
 915      as specified by the "OS_task" attribute.  */
 916   int is_OS_task;
 917
 918   /* 'true' - if current function is a 'main' function
 919      as specified by the "OS_main" attribute.  */
 920   int is_OS_main;
 921 };