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
   4    Free Software Foundation, Inc.
   5    Contributed by Denis Chertykov (denisc@overta.ru)
   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 2, 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 COPYING.  If not, write to
  21 the Free Software Foundation, 59 Temple Place - Suite 330,
  22 Boston, MA 02111-1307, USA.  */
  23
  24 /* Names to predefine in the preprocessor for this target machine.  */
  25
  26 #define TARGET_CPU_CPP_BUILTINS()               \
  27   do                                            \
  28     {                                           \
  29       builtin_define_std ("AVR");               \
  30       if (avr_base_arch_macro)                  \
  31         builtin_define (avr_base_arch_macro);   \
  32       if (avr_extra_arch_macro)                 \
  33         builtin_define (avr_extra_arch_macro);  \
  34       if (avr_asm_only_p)                       \
  35         builtin_define ("__AVR_ASM_ONLY__");    \
  36       if (avr_enhanced_p)                       \
  37         builtin_define ("__AVR_ENHANCED__");    \
  38       if (avr_mega_p)                           \
  39         builtin_define ("__AVR_MEGA__");        \
  40       if (TARGET_NO_INTERRUPTS)                 \
  41         builtin_define ("__NO_INTERRUPTS__");   \
  42     }                                           \
  43   while (0)
  44
  45 /* This declaration should be present.  */
  46 extern int target_flags;
  47
  48 #define MASK_ALL_DEBUG          0x00000FE0
  49 #define MASK_ORDER_1            0x00001000
  50 #define MASK_INSN_SIZE_DUMP     0x00002000
  51 #define MASK_ORDER_2            0x00004000
  52 #define MASK_NO_TABLEJUMP       0x00008000
  53 #define MASK_INT8               0x00010000
  54 #define MASK_NO_INTERRUPTS      0x00020000
  55 #define MASK_CALL_PROLOGUES     0x00040000
  56 #define MASK_TINY_STACK         0x00080000
  57 #define MASK_SHORT_CALLS        0x00100000
  58
  59 #define TARGET_ORDER_1          (target_flags & MASK_ORDER_1)
  60 #define TARGET_ORDER_2          (target_flags & MASK_ORDER_2)
  61 #define TARGET_INT8             (target_flags & MASK_INT8)
  62 #define TARGET_NO_INTERRUPTS    (target_flags & MASK_NO_INTERRUPTS)
  63 #define TARGET_INSN_SIZE_DUMP   (target_flags & MASK_INSN_SIZE_DUMP)
  64 #define TARGET_CALL_PROLOGUES   (target_flags & MASK_CALL_PROLOGUES)
  65 #define TARGET_TINY_STACK       (target_flags & MASK_TINY_STACK)
  66 #define TARGET_NO_TABLEJUMP     (target_flags & MASK_NO_TABLEJUMP)
  67 #define TARGET_SHORT_CALLS      (target_flags & MASK_SHORT_CALLS)
  68 #define TARGET_ALL_DEBUG        (target_flags & MASK_ALL_DEBUG)
  69
  70 #define TARGET_SWITCHES {                                               \
  71   { "order1", MASK_ORDER_1, NULL },                                     \
  72   { "order2", MASK_ORDER_2, NULL },                                     \
  73   { "int8", MASK_INT8, N_("Assume int to be 8 bit integer") },          \
  74   { "no-interrupts", MASK_NO_INTERRUPTS,                                \
  75     N_("Change the stack pointer without disabling interrupts") },      \
  76   { "call-prologues", MASK_CALL_PROLOGUES,                              \
  77     N_("Use subroutines for function prologue/epilogue") },             \
  78   { "tiny-stack", MASK_TINY_STACK,                                      \
  79     N_("Change only the low 8 bits of the stack pointer") },            \
  80   { "no-tablejump", MASK_NO_TABLEJUMP,                                  \
  81     N_("Do not generate tablejump insns") },                            \
  82   { "short-calls", MASK_SHORT_CALLS,                                    \
  83     N_("Use rjmp/rcall (limited range) on >8K devices") },              \
  84   { "size", MASK_INSN_SIZE_DUMP,                                        \
  85     N_("Output instruction sizes to the asm file") },                   \
  86   { "deb", MASK_ALL_DEBUG, NULL },                                      \
  87   { "", 0, NULL } }
  88
  89 extern const char *avr_init_stack;
  90 extern const char *avr_mcu_name;
  91
  92 extern const char *avr_base_arch_macro;
  93 extern const char *avr_extra_arch_macro;
  94 extern int avr_mega_p;
  95 extern int avr_enhanced_p;
  96 extern int avr_asm_only_p;
  97
  98 #define AVR_MEGA (avr_mega_p && !TARGET_SHORT_CALLS)
  99 #define AVR_ENHANCED (avr_enhanced_p)
 100
 101 #define TARGET_OPTIONS {                                                      \
 102  { "init-stack=", &avr_init_stack, N_("Specify the initial stack address"), 0}, \
 103  { "mcu=", &avr_mcu_name, N_("Specify the MCU name"), 0} }
 104
 105 #define TARGET_VERSION fprintf (stderr, " (GNU assembler syntax)");
 106
 107 #define OVERRIDE_OPTIONS avr_override_options ()
 108
 109 #define CAN_DEBUG_WITHOUT_FP
 110
 111 #define BITS_BIG_ENDIAN 0
 112 #define BYTES_BIG_ENDIAN 0
 113 #define WORDS_BIG_ENDIAN 0
 114
 115 #ifdef IN_LIBGCC2
 116 /* This is to get correct SI and DI modes in libgcc2.c (32 and 64 bits).  */
 117 #define UNITS_PER_WORD 4
 118 #else
 119 /* Width of a word, in units (bytes).  */
 120 #define UNITS_PER_WORD 1
 121 #endif
 122
 123 #define POINTER_SIZE 16
 124
 125
 126 /* Maximum sized of reasonable data type
 127    DImode or Dfmode ...  */
 128 #define MAX_FIXED_MODE_SIZE 32
 129
 130 #define PARM_BOUNDARY 8
 131
 132 #define FUNCTION_BOUNDARY 8
 133
 134 #define EMPTY_FIELD_BOUNDARY 8
 135
 136 /* No data type wants to be aligned rounder than this.  */
 137 #define BIGGEST_ALIGNMENT 8
 138
 139
 140 #define STRICT_ALIGNMENT 0
 141
 142 #define INT_TYPE_SIZE (TARGET_INT8 ? 8 : 16)
 143 #define SHORT_TYPE_SIZE (INT_TYPE_SIZE == 8 ? INT_TYPE_SIZE : 16)
 144 #define LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 16 : 32)
 145 #define LONG_LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 32 : 64)
 146 #define FLOAT_TYPE_SIZE 32
 147 #define DOUBLE_TYPE_SIZE 32
 148 #define LONG_DOUBLE_TYPE_SIZE 32
 149
 150 #define DEFAULT_SIGNED_CHAR 1
 151
 152 #define SIZE_TYPE (INT_TYPE_SIZE == 8 ? "long unsigned int" : "unsigned int")
 153 #define PTRDIFF_TYPE (INT_TYPE_SIZE == 8 ? "long int" :"int")
 154
 155 #define WCHAR_TYPE_SIZE 16
 156
 157 #define FIRST_PSEUDO_REGISTER 36
 158
 159 #define FIXED_REGISTERS {\
 160   1,1,/* r0 r1 */\
 161   0,0,/* r2 r3 */\
 162   0,0,/* r4 r5 */\
 163   0,0,/* r6 r7 */\
 164   0,0,/* r8 r9 */\
 165   0,0,/* r10 r11 */\
 166   0,0,/* r12 r13 */\
 167   0,0,/* r14 r15 */\
 168   0,0,/* r16 r17 */\
 169   0,0,/* r18 r19 */\
 170   0,0,/* r20 r21 */\
 171   0,0,/* r22 r23 */\
 172   0,0,/* r24 r25 */\
 173   0,0,/* r26 r27 */\
 174   0,0,/* r28 r29 */\
 175   0,0,/* r30 r31 */\
 176   1,1,/*  STACK */\
 177   1,1 /* arg pointer */  }
 178
 179 #define CALL_USED_REGISTERS {                   \
 180   1,1,/* r0 r1 */                               \
 181     0,0,/* r2 r3 */                             \
 182     0,0,/* r4 r5 */                             \
 183     0,0,/* r6 r7 */                             \
 184     0,0,/* r8 r9 */                             \
 185     0,0,/* r10 r11 */                           \
 186     0,0,/* r12 r13 */                           \
 187     0,0,/* r14 r15 */                           \
 188     0,0,/* r16 r17 */                           \
 189     1,1,/* r18 r19 */                           \
 190     1,1,/* r20 r21 */                           \
 191     1,1,/* r22 r23 */                           \
 192     1,1,/* r24 r25 */                           \
 193     1,1,/* r26 r27 */                           \
 194     0,0,/* r28 r29 */                           \
 195     1,1,/* r30 r31 */                           \
 196     1,1,/*  STACK */                            \
 197     1,1 /* arg pointer */  }
 198
 199 #define REG_ALLOC_ORDER {                       \
 200     24,25,                                      \
 201     18,19,                                      \
 202     20,21,                                      \
 203     22,23,                                      \
 204     30,31,                                      \
 205     26,27,                                      \
 206     28,29,                                      \
 207     17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,    \
 208     0,1,                                        \
 209     32,33,34,35                                 \
 210     }
 211
 212 #define ORDER_REGS_FOR_LOCAL_ALLOC order_regs_for_local_alloc ()
 213
 214
 215 #define HARD_REGNO_NREGS(REGNO, MODE) ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
 216
 217 #define HARD_REGNO_MODE_OK(REGNO, MODE) avr_hard_regno_mode_ok(REGNO, MODE)
 218
 219 #define MODES_TIEABLE_P(MODE1, MODE2) 0
 220
 221 enum reg_class {
 222   NO_REGS,
 223   R0_REG,                       /* r0 */
 224   POINTER_X_REGS,               /* r26 - r27 */
 225   POINTER_Y_REGS,               /* r28 - r29 */
 226   POINTER_Z_REGS,               /* r30 - r31 */
 227   STACK_REG,                    /* STACK */
 228   BASE_POINTER_REGS,            /* r28 - r31 */
 229   POINTER_REGS,                 /* r26 - r31 */
 230   ADDW_REGS,                    /* r24 - r31 */
 231   SIMPLE_LD_REGS,               /* r16 - r23 */
 232   LD_REGS,                      /* r16 - r31 */
 233   NO_LD_REGS,                   /* r0 - r15 */
 234   GENERAL_REGS,                 /* r0 - r31 */
 235   ALL_REGS, LIM_REG_CLASSES
 236 };
 237
 238
 239 #define N_REG_CLASSES (int)LIM_REG_CLASSES
 240
 241 #define REG_CLASS_NAMES {                                       \
 242                  "NO_REGS",                                     \
 243                    "R0_REG",    /* r0 */                        \
 244                    "POINTER_X_REGS", /* r26 - r27 */            \
 245                    "POINTER_Y_REGS", /* r28 - r29 */            \
 246                    "POINTER_Z_REGS", /* r30 - r31 */            \
 247                    "STACK_REG", /* STACK */                     \
 248                    "BASE_POINTER_REGS", /* r28 - r31 */         \
 249                    "POINTER_REGS", /* r26 - r31 */              \
 250                    "ADDW_REGS", /* r24 - r31 */                 \
 251                    "SIMPLE_LD_REGS", /* r16 - r23 */            \
 252                    "LD_REGS",   /* r16 - r31 */                 \
 253                    "NO_LD_REGS", /* r0 - r15 */                 \
 254                    "GENERAL_REGS", /* r0 - r31 */               \
 255                    "ALL_REGS" }
 256
 257 #define REG_X 26
 258 #define REG_Y 28
 259 #define REG_Z 30
 260 #define REG_W 24
 261
 262 #define REG_CLASS_CONTENTS {                                            \
 263   {0x00000000,0x00000000},      /* NO_REGS */                           \
 264   {0x00000001,0x00000000},      /* R0_REG */                            \
 265   {3 << REG_X,0x00000000},      /* POINTER_X_REGS, r26 - r27 */         \
 266   {3 << REG_Y,0x00000000},      /* POINTER_Y_REGS, r28 - r29 */         \
 267   {3 << REG_Z,0x00000000},      /* POINTER_Z_REGS, r30 - r31 */         \
 268   {0x00000000,0x00000003},      /* STACK_REG, STACK */                  \
 269   {(3 << REG_Y) | (3 << REG_Z),                                         \
 270      0x00000000},               /* BASE_POINTER_REGS, r28 - r31 */      \
 271   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z),                          \
 272      0x00000000},               /* POINTER_REGS, r26 - r31 */           \
 273   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z) | (3 << REG_W),           \
 274      0x00000000},               /* ADDW_REGS, r24 - r31 */              \
 275   {0x00ff0000,0x00000000},      /* SIMPLE_LD_REGS r16 - r23 */          \
 276   {(3 << REG_X)|(3 << REG_Y)|(3 << REG_Z)|(3 << REG_W)|(0xff << 16),    \
 277      0x00000000},       /* LD_REGS, r16 - r31 */                        \
 278   {0x0000ffff,0x00000000},      /* NO_LD_REGS  r0 - r15 */              \
 279   {0xffffffff,0x00000000},      /* GENERAL_REGS, r0 - r31 */            \
 280   {0xffffffff,0x00000003}       /* ALL_REGS */                          \
 281 }
 282
 283 #define REGNO_REG_CLASS(R) avr_regno_reg_class(R)
 284
 285 #define BASE_REG_CLASS (reload_completed ? BASE_POINTER_REGS : POINTER_REGS)
 286
 287 #define INDEX_REG_CLASS NO_REGS
 288
 289 #define REG_CLASS_FROM_LETTER(C) avr_reg_class_from_letter(C)
 290
 291 #define REGNO_OK_FOR_BASE_P(r) (((r) < FIRST_PSEUDO_REGISTER            \
 292                                  && ((r) == REG_X                       \
 293                                      || (r) == REG_Y                    \
 294                                      || (r) == REG_Z                    \
 295                                      || (r) == ARG_POINTER_REGNUM))     \
 296                                 || (reg_renumber                        \
 297                                     && (reg_renumber[r] == REG_X        \
 298                                         || reg_renumber[r] == REG_Y     \
 299                                         || reg_renumber[r] == REG_Z     \
 300                                         || (reg_renumber[r]             \
 301                                             == ARG_POINTER_REGNUM))))
 302
 303 #define REGNO_OK_FOR_INDEX_P(NUM) 0
 304
 305 #define PREFERRED_RELOAD_CLASS(X, CLASS) preferred_reload_class(X,CLASS)
 306
 307 #define SMALL_REGISTER_CLASSES 1
 308
 309 #define CLASS_LIKELY_SPILLED_P(c) class_likely_spilled_p(c)
 310
 311 #define CLASS_MAX_NREGS(CLASS, MODE)   class_max_nregs (CLASS, MODE)
 312
 313 #define CONST_OK_FOR_LETTER_P(VALUE, C)                         \
 314   ((C) == 'I' ? (VALUE) >= 0 && (VALUE) <= 63 :                 \
 315    (C) == 'J' ? (VALUE) <= 0 && (VALUE) >= -63:                 \
 316    (C) == 'K' ? (VALUE) == 2 :                                  \
 317    (C) == 'L' ? (VALUE) == 0 :                                  \
 318    (C) == 'M' ? (VALUE) >= 0 && (VALUE) <= 0xff :               \
 319    (C) == 'N' ? (VALUE) == -1:                                  \
 320    (C) == 'O' ? (VALUE) == 8 || (VALUE) == 16 || (VALUE) == 24: \
 321    (C) == 'P' ? (VALUE) == 1 :                                  \
 322    0)
 323
 324 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
 325   ((C) == 'G' ? (VALUE) == CONST0_RTX (SFmode)  \
 326    : 0)
 327
 328 #define EXTRA_CONSTRAINT(x, c) extra_constraint(x, c)
 329
 330 #define STACK_PUSH_CODE POST_DEC
 331
 332 #define STACK_GROWS_DOWNWARD
 333
 334 #define STARTING_FRAME_OFFSET 1
 335
 336 #define STACK_POINTER_OFFSET 1
 337
 338 #define FIRST_PARM_OFFSET(FUNDECL) 0
 339
 340 #define STACK_BOUNDARY 8
 341
 342 #define STACK_POINTER_REGNUM 32
 343
 344 #define FRAME_POINTER_REGNUM REG_Y
 345
 346 #define ARG_POINTER_REGNUM 34
 347
 348 #define STATIC_CHAIN_REGNUM 2
 349
 350 #define FRAME_POINTER_REQUIRED frame_pointer_required_p()
 351
 352 #define ELIMINABLE_REGS {                                       \
 353       {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},               \
 354         {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}            \
 355        ,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}}
 356
 357 #define CAN_ELIMINATE(FROM, TO) (((FROM) == ARG_POINTER_REGNUM             \
 358                                   && (TO) == FRAME_POINTER_REGNUM)         \
 359                                  || (((FROM) == FRAME_POINTER_REGNUM       \
 360                                       || (FROM) == FRAME_POINTER_REGNUM+1) \
 361                                      && ! FRAME_POINTER_REQUIRED           \
 362                                      ))
 363
 364 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                    \
 365      OFFSET = initial_elimination_offset (FROM, TO)
 366
 367 #define RETURN_ADDR_RTX(count, x) \
 368   gen_rtx_MEM (Pmode, memory_address (Pmode, plus_constant (tem, 1)))
 369
 370 #define PUSH_ROUNDING(NPUSHED) (NPUSHED)
 371
 372 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
 373
 374 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) (function_arg (&(CUM), MODE, TYPE, NAMED))
 375
 376 typedef struct avr_args {
 377   int nregs;                    /* # registers available for passing */
 378   int regno;                    /* next available register number */
 379 } CUMULATIVE_ARGS;
 380
 381 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
 382   init_cumulative_args (&(CUM), FNTYPE, LIBNAME, FNDECL)
 383
 384 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)    \
 385   (function_arg_advance (&CUM, MODE, TYPE, NAMED))
 386
 387 #define FUNCTION_ARG_REGNO_P(r) function_arg_regno_p(r)
 388
 389 extern int avr_reg_order[];
 390
 391 #define RET_REGISTER avr_ret_register ()
 392
 393 #define FUNCTION_VALUE(VALTYPE, FUNC) avr_function_value (VALTYPE, FUNC)
 394
 395 #define LIBCALL_VALUE(MODE)  avr_libcall_value (MODE)
 396
 397 #define FUNCTION_VALUE_REGNO_P(N) ((int) (N) == RET_REGISTER)
 398
 399 #define DEFAULT_PCC_STRUCT_RETURN 0
 400
 401 #define EPILOGUE_USES(REGNO) 0
 402
 403 #define HAVE_POST_INCREMENT 1
 404 #define HAVE_PRE_DECREMENT 1
 405
 406 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
 407
 408 #define MAX_REGS_PER_ADDRESS 1
 409
 410 #ifdef REG_OK_STRICT
 411 #  define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
 412 {                                                       \
 413   if (legitimate_address_p (mode, operand, 1))          \
 414     goto ADDR;                                          \
 415 }
 416 #  else
 417 #  define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
 418 {                                                       \
 419   if (legitimate_address_p (mode, operand, 0))          \
 420     goto ADDR;                                          \
 421 }
 422 #endif
 423
 424 #define REG_OK_FOR_BASE_NOSTRICT_P(X) \
 425   (REGNO (X) >= FIRST_PSEUDO_REGISTER || REG_OK_FOR_BASE_STRICT_P(X))
 426
 427 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
 428
 429 #ifdef REG_OK_STRICT
 430 #  define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P (X)
 431 #else
 432 #  define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NOSTRICT_P (X)
 433 #endif
 434
 435 #define REG_OK_FOR_INDEX_P(X) 0
 436
 437 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)                          \
 438 {                                                                       \
 439   (X) = legitimize_address (X, OLDX, MODE);                             \
 440   if (memory_address_p (MODE, X))                                       \
 441     goto WIN;                                                           \
 442 }
 443
 444 #define XEXP_(X,Y) (X)
 445 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN)    \
 446 do {                                                                        \
 447   if (1&&(GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC))     \
 448     {                                                                       \
 449       push_reload (XEXP (X,0), XEXP (X,0), &XEXP (X,0), &XEXP (X,0),        \
 450                    POINTER_REGS, GET_MODE (X),GET_MODE (X) , 0, 0,          \
 451                    OPNUM, RELOAD_OTHER);                                    \
 452       goto WIN;                                                             \
 453     }                                                                       \
 454   if (GET_CODE (X) == PLUS                                                  \
 455       && REG_P (XEXP (X, 0))                                                \
 456       && GET_CODE (XEXP (X, 1)) == CONST_INT                                \
 457       && INTVAL (XEXP (X, 1)) >= 1)                                         \
 458     {                                                                       \
 459       int fit = INTVAL (XEXP (X, 1)) <= (64 - GET_MODE_SIZE (MODE));        \
 460       if (fit)                                                              \
 461         {                                                                   \
 462           if (reg_equiv_address[REGNO (XEXP (X, 0))] != 0)                  \
 463             {                                                               \
 464               int regno = REGNO (XEXP (X, 0));                              \
 465               rtx mem = make_memloc (X, regno);                             \
 466               push_reload (XEXP (mem,0), NULL, &XEXP (mem,0), NULL,         \
 467                            POINTER_REGS, Pmode, VOIDmode, 0, 0,             \
 468                            1, ADDR_TYPE (TYPE));                            \
 469               push_reload (mem, NULL_RTX, &XEXP (X, 0), NULL,               \
 470                            BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
 471                            OPNUM, TYPE);                                    \
 472               goto WIN;                                                     \
 473             }                                                               \
 474           push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL,           \
 475                        BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0,     \
 476                        OPNUM, TYPE);                                        \
 477           goto WIN;                                                         \
 478         }                                                                   \
 479       else if (! (frame_pointer_needed && XEXP (X,0) == frame_pointer_rtx)) \
 480         {                                                                   \
 481           push_reload (X, NULL_RTX, &X, NULL,                               \
 482                        POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0,          \
 483                        OPNUM, TYPE);                                        \
 484           goto WIN;                                                         \
 485         }                                                                   \
 486     }                                                                       \
 487 } while(0)
 488
 489 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)                        \
 490       if (GET_CODE (ADDR) == POST_INC || GET_CODE (ADDR) == PRE_DEC)    \
 491         goto LABEL
 492
 493 #define LEGITIMATE_CONSTANT_P(X) 1
 494
 495 #define REGISTER_MOVE_COST(MODE, FROM, TO) ((FROM) == STACK_REG ? 6 \
 496                                             : (TO) == STACK_REG ? 12 \
 497                                             : 2)
 498
 499 #define MEMORY_MOVE_COST(MODE,CLASS,IN) ((MODE)==QImode ? 2 :   \
 500                                          (MODE)==HImode ? 4 :   \
 501                                          (MODE)==SImode ? 8 :   \
 502                                          (MODE)==SFmode ? 8 : 16)
 503
 504 #define BRANCH_COST 0
 505
 506 #define SLOW_BYTE_ACCESS 0
 507
 508 #define NO_FUNCTION_CSE
 509
 510 #define TEXT_SECTION_ASM_OP "\t.text"
 511
 512 #define DATA_SECTION_ASM_OP "\t.data"
 513
 514 #define BSS_SECTION_ASM_OP "\t.section .bss"
 515
 516 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
 517    There are no shared libraries on this target, and these sections are
 518    placed in the read-only program memory, so they are not writable.  */
 519
 520 #undef CTORS_SECTION_ASM_OP
 521 #define CTORS_SECTION_ASM_OP "\t.section .ctors,\"a\",@progbits"
 522
 523 #undef DTORS_SECTION_ASM_OP
 524 #define DTORS_SECTION_ASM_OP "\t.section .dtors,\"a\",@progbits"
 525
 526 #define TARGET_ASM_CONSTRUCTOR avr_asm_out_ctor
 527
 528 #define TARGET_ASM_DESTRUCTOR avr_asm_out_dtor
 529
 530 #define EXTRA_SECTIONS in_progmem
 531
 532 #define EXTRA_SECTION_FUNCTIONS                                               \
 533                                                                               \
 534 void                                                                          \
 535 progmem_section (void)                                                        \
 536 {                                                                             \
 537   if (in_section != in_progmem)                                               \
 538     {                                                                         \
 539       fprintf (asm_out_file,                                                  \
 540                "\t.section .progmem.gcc_sw_table, \"%s\", @progbits\n",       \
 541                AVR_MEGA ? "a" : "ax");                                        \
 542       /* Should already be aligned, this is just to be safe if it isn't.  */  \
 543       fprintf (asm_out_file, "\t.p2align 1\n");                               \
 544       in_section = in_progmem;                                                \
 545     }                                                                         \
 546 }
 547
 548 #define READONLY_DATA_SECTION data_section
 549
 550 #define JUMP_TABLES_IN_TEXT_SECTION 0
 551
 552 #define ASM_COMMENT_START " ; "
 553
 554 #define ASM_APP_ON "/* #APP */\n"
 555
 556 #define ASM_APP_OFF "/* #NOAPP */\n"
 557
 558 /* Switch into a generic section.  */
 559 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
 560
 561 #define ASM_OUTPUT_ASCII(FILE, P, SIZE)  gas_output_ascii (FILE,P,SIZE)
 562
 563 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == '\n'                    \
 564                                           || ((C) == '$'))
 565
 566 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)                     \
 567 do {                                                                       \
 568      fputs ("\t.comm ", (STREAM));                                         \
 569      assemble_name ((STREAM), (NAME));                                     \
 570      fprintf ((STREAM), ",%lu,1\n", (unsigned long)(SIZE));                \
 571 } while (0)
 572
 573 #define ASM_OUTPUT_BSS(FILE, DECL, NAME, SIZE, ROUNDED)                 \
 574   asm_output_bss ((FILE), (DECL), (NAME), (SIZE), (ROUNDED))
 575
 576 #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED)                   \
 577 do {                                                                    \
 578      fputs ("\t.lcomm ", (STREAM));                                     \
 579      assemble_name ((STREAM), (NAME));                                  \
 580      fprintf ((STREAM), ",%d\n", (int)(SIZE));                          \
 581 } while (0)
 582
 583 #undef TYPE_ASM_OP
 584 #undef SIZE_ASM_OP
 585 #undef WEAK_ASM_OP
 586 #define TYPE_ASM_OP     "\t.type\t"
 587 #define SIZE_ASM_OP     "\t.size\t"
 588 #define WEAK_ASM_OP     "\t.weak\t"
 589 /* Define the strings used for the special svr4 .type and .size directives.
 590    These strings generally do not vary from one system running svr4 to
 591    another, but if a given system (e.g. m88k running svr) needs to use
 592    different pseudo-op names for these, they may be overridden in the
 593    file which includes this one.  */
 594
 595
 596 #undef TYPE_OPERAND_FMT
 597 #define TYPE_OPERAND_FMT        "@%s"
 598 /* The following macro defines the format used to output the second
 599    operand of the .type assembler directive.  Different svr4 assemblers
 600    expect various different forms for this operand.  The one given here
 601    is just a default.  You may need to override it in your machine-
 602    specific tm.h file (depending upon the particulars of your assembler).  */
 603
 604 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 605 do {                                                            \
 606      ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");        \
 607      ASM_OUTPUT_LABEL (FILE, NAME);                             \
 608 } while (0)
 609
 610 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)                    \
 611   do {                                                                  \
 612     if (!flag_inhibit_size_directive)                                   \
 613       ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                           \
 614   } while (0)
 615
 616 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 617 do {                                                                    \
 618   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");                     \
 619   size_directive_output = 0;                                            \
 620   if (!flag_inhibit_size_directive && DECL_SIZE (DECL))                 \
 621     {                                                                   \
 622       size_directive_output = 1;                                        \
 623       ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME,                            \
 624                                  int_size_in_bytes (TREE_TYPE (DECL))); \
 625     }                                                                   \
 626   ASM_OUTPUT_LABEL(FILE, NAME);                                         \
 627 } while (0)
 628
 629 #undef ASM_FINISH_DECLARE_OBJECT
 630 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)         \
 631 do {                                                                     \
 632      const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);             \
 633      HOST_WIDE_INT size;                                                 \
 634      if (!flag_inhibit_size_directive && DECL_SIZE (DECL)                \
 635          && ! AT_END && TOP_LEVEL                                        \
 636          && DECL_INITIAL (DECL) == error_mark_node                       \
 637          && !size_directive_output)                                      \
 638        {                                                                 \
 639          size_directive_output = 1;                                      \
 640          size = int_size_in_bytes (TREE_TYPE (DECL));                    \
 641          ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size);                   \
 642        }                                                                 \
 643    } while (0)
 644
 645
 646 #define ESCAPES \
 647 "\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\
 648 \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\
 649 \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\
 650 \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\
 651 \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\
 652 \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\
 653 \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\
 654 \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"
 655 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
 656    ASM_OUTPUT_LIMITED_STRING macros.  Each byte in the table
 657    corresponds to a particular byte value [0..255].  For any
 658    given byte value, if the value in the corresponding table
 659    position is zero, the given character can be output directly.
 660    If the table value is 1, the byte must be output as a \ooo
 661    octal escape.  If the tables value is anything else, then the
 662    byte value should be output as a \ followed by the value
 663    in the table.  Note that we can use standard UN*X escape
 664    sequences for many control characters, but we don't use
 665    \a to represent BEL because some svr4 assemblers (e.g. on
 666    the i386) don't know about that.  Also, we don't use \v
 667    since some versions of gas, such as 2.2 did not accept it.  */
 668
 669 #define STRING_LIMIT    ((unsigned) 64)
 670 #define STRING_ASM_OP   "\t.string\t"
 671 /* Some svr4 assemblers have a limit on the number of characters which
 672    can appear in the operand of a .string directive.  If your assembler
 673    has such a limitation, you should define STRING_LIMIT to reflect that
 674    limit.  Note that at least some svr4 assemblers have a limit on the
 675    actual number of bytes in the double-quoted string, and that they
 676    count each character in an escape sequence as one byte.  Thus, an
 677    escape sequence like \377 would count as four bytes.
 678
 679    If your target assembler doesn't support the .string directive, you
 680    should define this to zero.  */
 681
 682 /* Globalizing directive for a label.  */
 683 #define GLOBAL_ASM_OP ".global\t"
 684
 685 #define ASM_WEAKEN_LABEL(FILE, NAME)    \
 686   do                                    \
 687     {                                   \
 688       fputs ("\t.weak\t", (FILE));      \
 689       assemble_name ((FILE), (NAME));   \
 690       fputc ('\n', (FILE));             \
 691     }                                   \
 692   while (0)
 693
 694 #define SUPPORTS_WEAK 1
 695
 696 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)        \
 697 sprintf (STRING, "*.%s%lu", PREFIX, (unsigned long)(NUM))
 698
 699 #define HAS_INIT_SECTION 1
 700
 701 #define REGISTER_NAMES {                                \
 702   "r0","r1","r2","r3","r4","r5","r6","r7",              \
 703     "r8","r9","r10","r11","r12","r13","r14","r15",      \
 704     "r16","r17","r18","r19","r20","r21","r22","r23",    \
 705     "r24","r25","r26","r27","r28","r29","r30","r31",    \
 706     "__SPL__","__SPH__","argL","argH"}
 707
 708 #define FINAL_PRESCAN_INSN(insn, operand, nop) final_prescan_insn (insn, operand,nop)
 709
 710 #define PRINT_OPERAND(STREAM, X, CODE) print_operand (STREAM, X, CODE)
 711
 712 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '~')
 713
 714 #define PRINT_OPERAND_ADDRESS(STREAM, X) print_operand_address(STREAM, X)
 715
 716 #define USER_LABEL_PREFIX ""
 717
 718 #define ASSEMBLER_DIALECT AVR_ENHANCED
 719
 720 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO)      \
 721 {                                               \
 722   if (REGNO > 31)                               \
 723     abort ();                                   \
 724   fprintf (STREAM, "\tpush\tr%d", REGNO);       \
 725 }
 726
 727 #define ASM_OUTPUT_REG_POP(STREAM, REGNO)       \
 728 {                                               \
 729   if (REGNO > 31)                               \
 730     abort ();                                   \
 731   fprintf (STREAM, "\tpop\tr%d", REGNO);        \
 732 }
 733
 734 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)          \
 735   avr_output_addr_vec_elt(STREAM, VALUE)
 736
 737 #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) \
 738   progmem_section (), (*targetm.asm_out.internal_label) (STREAM, PREFIX, NUM)
 739
 740 #define ASM_OUTPUT_SKIP(STREAM, N)              \
 741 fprintf (STREAM, "\t.skip %lu,0\n", (unsigned long)(N))
 742
 743 #define ASM_OUTPUT_ALIGN(STREAM, POWER)
 744
 745 #define CASE_VECTOR_MODE HImode
 746
 747 extern int avr_case_values_threshold;
 748
 749 #define CASE_VALUES_THRESHOLD avr_case_values_threshold
 750
 751 #undef WORD_REGISTER_OPERATIONS
 752
 753 #define MOVE_MAX 4
 754
 755 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
 756
 757 #define Pmode HImode
 758
 759 #define FUNCTION_MODE HImode
 760
 761 #define DOLLARS_IN_IDENTIFIERS 0
 762
 763 #define NO_DOLLAR_IN_LABEL 1
 764
 765 #define TRAMPOLINE_TEMPLATE(FILE) \
 766   internal_error ("trampolines not supported")
 767
 768 #define TRAMPOLINE_SIZE 4
 769
 770 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)                             \
 771 {                                                                             \
 772   emit_move_insn (gen_rtx_MEM (HImode, plus_constant ((TRAMP), 2)), CXT);    \
 773   emit_move_insn (gen_rtx_MEM (HImode, plus_constant ((TRAMP), 6)), FNADDR); \
 774 }
 775 /* Store in cc_status the expressions
 776    that the condition codes will describe
 777    after execution of an instruction whose pattern is EXP.
 778    Do not alter them if the instruction would not alter the cc's.  */
 779
 780 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
 781
 782 /* The add insns don't set overflow in a usable way.  */
 783 #define CC_OVERFLOW_UNUSABLE 01000
 784 /* The mov,and,or,xor insns don't set carry.  That's ok though as the
 785    Z bit is all we need when doing unsigned comparisons on the result of
 786    these insns (since they're always with 0).  However, conditions.h has
 787    CC_NO_OVERFLOW defined for this purpose.  Rename it to something more
 788    understandable.  */
 789 #define CC_NO_CARRY CC_NO_OVERFLOW
 790
 791
 792 /* Output assembler code to FILE to increment profiler label # LABELNO
 793    for profiling a function entry.  */
 794
 795 #define FUNCTION_PROFILER(FILE, LABELNO)  \
 796   fprintf (FILE, "/* profiler %d */", (LABELNO))
 797
 798 #define ADJUST_INSN_LENGTH(INSN, LENGTH) (LENGTH =\
 799                                           adjust_insn_length (INSN, LENGTH))
 800
 801 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE}"
 802
 803 #define CC1_SPEC "%{profile:-p}"
 804
 805 #define CC1PLUS_SPEC "%{!frtti:-fno-rtti} \
 806     %{!fenforce-eh-specs:-fno-enforce-eh-specs} \
 807     %{!fexceptions:-fno-exceptions}"
 808 /* A C string constant that tells the GCC drvier program options to
 809    pass to `cc1plus'.  */
 810
 811 #define ASM_SPEC "%{mmcu=*:-mmcu=%*}"
 812
 813 #define LINK_SPEC " %{!mmcu*:-m avr2}\
 814 %{mmcu=at90s1200|mmcu=attiny11|mmcu=attiny12|mmcu=attiny15|mmcu=attiny28:-m avr1} \
 815 %{mmcu=attiny22|mmcu=attiny26|mmcu=at90s2*|mmcu=at90s4*|mmcu=at90s8*|mmcu=at90c8*|mmcu=at86rf401:-m avr2}\
 816 %{mmcu=atmega103|mmcu=atmega603|mmcu=at43*|mmcu=at76*:-m avr3}\
 817 %{mmcu=atmega8*|mmcu=atmega48|mmcu=attiny13|mmcu=attiny2313:-m avr4}\
 818 %{mmcu=atmega16*|mmcu=atmega32*|mmcu=atmega64*|mmcu=atmega128|mmcu=at90can128|mmcu=at94k:-m avr5}\
 819 %{mmcu=atmega325|mmcu=atmega3250|mmcu=atmega48|mmcu=atmega88|mmcu=atmega64|mmcu=atmega645|mmcu=atmega6450|mmcu=atmega128|mmcu=at90can128|mmcu=at90can128|mmcu=atmega162|mmcu=atmega165|mmcu=atmega168|mmcu=atmega169: -Tdata 0x800100} "
 820
 821 #define LIB_SPEC \
 822   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lc }}}}}"
 823
 824 #define LIBSTDCXX "-lgcc"
 825 /* No libstdc++ for now.  Empty string doesn't work.  */
 826
 827 #define LIBGCC_SPEC \
 828   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lgcc }}}}}"
 829
 830 #define STARTFILE_SPEC "%(crt_binutils)"
 831
 832 #define ENDFILE_SPEC ""
 833
 834 #define CRT_BINUTILS_SPECS "\
 835 %{mmcu=at90s1200|mmcu=avr1:crts1200.o%s} \
 836 %{mmcu=attiny11:crttn11.o%s} \
 837 %{mmcu=attiny12:crttn12.o%s} \
 838 %{mmcu=attiny15:crttn15.o%s} \
 839 %{mmcu=attiny28:crttn28.o%s} \
 840 %{!mmcu*|mmcu=at90s8515|mmcu=avr2:crts8515.o%s} \
 841 %{mmcu=at90s2313:crts2313.o%s} \
 842 %{mmcu=at90s2323:crts2323.o%s} \
 843 %{mmcu=at90s2333:crts2333.o%s} \
 844 %{mmcu=at90s2343:crts2343.o%s} \
 845 %{mmcu=attiny22:crttn22.o%s} \
 846 %{mmcu=attiny26:crttn26.o%s} \
 847 %{mmcu=at90s4433:crts4433.o%s} \
 848 %{mmcu=at90s4414:crts4414.o%s} \
 849 %{mmcu=at90s4434:crts4434.o%s} \
 850 %{mmcu=at90c8534:crtc8534.o%s} \
 851 %{mmcu=at90s8535:crts8535.o%s} \
 852 %{mmcu=at86rf401:crt86401.o%s} \
 853 %{mmcu=atmega103|mmcu=avr3:crtm103.o%s} \
 854 %{mmcu=atmega603:crtm603.o%s} \
 855 %{mmcu=at43usb320:crt43320.o%s} \
 856 %{mmcu=at43usb355:crt43355.o%s} \
 857 %{mmcu=at76c711:crt76711.o%s} \
 858 %{mmcu=atmega8|mmcu=avr4:crtm8.o%s} \
 859 %{mmcu=atmega48:crtm48.o%s} \
 860 %{mmcu=atmega88:crtm88.o%s} \
 861 %{mmcu=atmega8515:crtm8515.o%s} \
 862 %{mmcu=atmega8535:crtm8535.o%s} \
 863 %{mmcu=attiny13:crttn13.o%s} \
 864 %{mmcu=attiny2313:crttn2313.o%s} \
 865 %{mmcu=atmega16:crtm16.o%s} \
 866 %{mmcu=atmega161|mmcu=avr5:crtm161.o%s} \
 867 %{mmcu=atmega162:crtm162.o%s} \
 868 %{mmcu=atmega163:crtm163.o%s} \
 869 %{mmcu=atmega165:crtm165.o%s} \
 870 %{mmcu=atmega168:crtm168.o%s} \
 871 %{mmcu=atmega169:crtm169.o%s} \
 872 %{mmcu=atmega32:crtm32.o%s} \
 873 %{mmcu=atmega323:crtm323.o%s} \
 874 %{mmcu=atmega325:crtm325.o%s} \
 875 %{mmcu=atmega3250:crtm3250.o%s} \
 876 %{mmcu=atmega64:crtm64.o%s} \
 877 %{mmcu=atmega645:crtm6450.o%s} \
 878 %{mmcu=atmega6450:crtm6450.o%s} \
 879 %{mmcu=atmega128:crtm128.o%s} \
 880 %{mmcu=at90can128:crtcan128.o%s} \
 881 %{mmcu=at94k:crtat94k.o%s}"
 882
 883 #define EXTRA_SPECS {"crt_binutils", CRT_BINUTILS_SPECS},
 884
 885 /* This is the default without any -mmcu=* option (AT90S*).  */
 886 #define MULTILIB_DEFAULTS { "mmcu=avr2" }
 887
 888 /* This is undefined macro for collect2 disabling */
 889 #define LINKER_NAME "ld"
 890
 891 #define TEST_HARD_REG_CLASS(CLASS, REGNO) \
 892   TEST_HARD_REG_BIT (reg_class_contents[ (int) (CLASS)], REGNO)
 893
 894 /* Note that the other files fail to use these
 895    in some of the places where they should.  */
 896
 897 #if defined(__STDC__) || defined(ALMOST_STDC)
 898 #define AS2(a,b,c) #a " " #b "," #c
 899 #define AS2C(b,c) " " #b "," #c
 900 #define AS3(a,b,c,d) #a " " #b "," #c "," #d
 901 #define AS1(a,b) #a " " #b
 902 #else
 903 #define AS1(a,b) "a     b"
 904 #define AS2(a,b,c) "a   b,c"
 905 #define AS2C(b,c) " b,c"
 906 #define AS3(a,b,c,d) "a b,c,d"
 907 #endif
 908 #define OUT_AS1(a,b) output_asm_insn (AS1(a,b), operands)
 909 #define OUT_AS2(a,b,c) output_asm_insn (AS2(a,b,c), operands)
 910 #define CR_TAB "\n\t"
 911
 912 /* Temporary register r0 */
 913 #define TMP_REGNO 0
 914
 915 /* zero register r1 */
 916 #define ZERO_REGNO 1
 917
 918 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG