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 MAX_LONG_TYPE_SIZE 32
 146 #define LONG_LONG_TYPE_SIZE 64
 147 #define FLOAT_TYPE_SIZE 32
 148 #define DOUBLE_TYPE_SIZE 32
 149 #define LONG_DOUBLE_TYPE_SIZE 32
 150
 151 #define DEFAULT_SIGNED_CHAR 1
 152
 153 #define SIZE_TYPE (INT_TYPE_SIZE == 8 ? "long unsigned int" : "unsigned int")
 154 #define PTRDIFF_TYPE (INT_TYPE_SIZE == 8 ? "long int" :"int")
 155
 156 #define WCHAR_TYPE_SIZE 16
 157
 158 #define FIRST_PSEUDO_REGISTER 36
 159
 160 #define FIXED_REGISTERS {\
 161   1,1,/* r0 r1 */\
 162   0,0,/* r2 r3 */\
 163   0,0,/* r4 r5 */\
 164   0,0,/* r6 r7 */\
 165   0,0,/* r8 r9 */\
 166   0,0,/* r10 r11 */\
 167   0,0,/* r12 r13 */\
 168   0,0,/* r14 r15 */\
 169   0,0,/* r16 r17 */\
 170   0,0,/* r18 r19 */\
 171   0,0,/* r20 r21 */\
 172   0,0,/* r22 r23 */\
 173   0,0,/* r24 r25 */\
 174   0,0,/* r26 r27 */\
 175   0,0,/* r28 r29 */\
 176   0,0,/* r30 r31 */\
 177   1,1,/*  STACK */\
 178   1,1 /* arg pointer */  }
 179
 180 #define CALL_USED_REGISTERS {                   \
 181   1,1,/* r0 r1 */                               \
 182     0,0,/* r2 r3 */                             \
 183     0,0,/* r4 r5 */                             \
 184     0,0,/* r6 r7 */                             \
 185     0,0,/* r8 r9 */                             \
 186     0,0,/* r10 r11 */                           \
 187     0,0,/* r12 r13 */                           \
 188     0,0,/* r14 r15 */                           \
 189     0,0,/* r16 r17 */                           \
 190     1,1,/* r18 r19 */                           \
 191     1,1,/* r20 r21 */                           \
 192     1,1,/* r22 r23 */                           \
 193     1,1,/* r24 r25 */                           \
 194     1,1,/* r26 r27 */                           \
 195     0,0,/* r28 r29 */                           \
 196     1,1,/* r30 r31 */                           \
 197     1,1,/*  STACK */                            \
 198     1,1 /* arg pointer */  }
 199
 200 #define NON_SAVING_SETJMP 0
 201
 202 #define REG_ALLOC_ORDER {                       \
 203     24,25,                                      \
 204     18,19,                                      \
 205     20,21,                                      \
 206     22,23,                                      \
 207     30,31,                                      \
 208     26,27,                                      \
 209     28,29,                                      \
 210     17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,    \
 211     0,1,                                        \
 212     32,33,34,35                                 \
 213     }
 214
 215 #define ORDER_REGS_FOR_LOCAL_ALLOC order_regs_for_local_alloc ()
 216
 217
 218 #define HARD_REGNO_NREGS(REGNO, MODE) ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
 219
 220 #define HARD_REGNO_MODE_OK(REGNO, MODE) avr_hard_regno_mode_ok(REGNO, MODE)
 221
 222 #define MODES_TIEABLE_P(MODE1, MODE2) 0
 223
 224 enum reg_class {
 225   NO_REGS,
 226   R0_REG,                       /* r0 */
 227   POINTER_X_REGS,               /* r26 - r27 */
 228   POINTER_Y_REGS,               /* r28 - r29 */
 229   POINTER_Z_REGS,               /* r30 - r31 */
 230   STACK_REG,                    /* STACK */
 231   BASE_POINTER_REGS,            /* r28 - r31 */
 232   POINTER_REGS,                 /* r26 - r31 */
 233   ADDW_REGS,                    /* r24 - r31 */
 234   SIMPLE_LD_REGS,               /* r16 - r23 */
 235   LD_REGS,                      /* r16 - r31 */
 236   NO_LD_REGS,                   /* r0 - r15 */
 237   GENERAL_REGS,                 /* r0 - r31 */
 238   ALL_REGS, LIM_REG_CLASSES
 239 };
 240
 241
 242 #define N_REG_CLASSES (int)LIM_REG_CLASSES
 243
 244 #define REG_CLASS_NAMES {                                       \
 245                  "NO_REGS",                                     \
 246                    "R0_REG",    /* r0 */                        \
 247                    "POINTER_X_REGS", /* r26 - r27 */            \
 248                    "POINTER_Y_REGS", /* r28 - r29 */            \
 249                    "POINTER_Z_REGS", /* r30 - r31 */            \
 250                    "STACK_REG", /* STACK */                     \
 251                    "BASE_POINTER_REGS", /* r28 - r31 */         \
 252                    "POINTER_REGS", /* r26 - r31 */              \
 253                    "ADDW_REGS", /* r24 - r31 */                 \
 254                    "SIMPLE_LD_REGS", /* r16 - r23 */            \
 255                    "LD_REGS",   /* r16 - r31 */                 \
 256                    "NO_LD_REGS", /* r0 - r15 */                 \
 257                    "GENERAL_REGS", /* r0 - r31 */               \
 258                    "ALL_REGS" }
 259
 260 #define REG_X 26
 261 #define REG_Y 28
 262 #define REG_Z 30
 263 #define REG_W 24
 264
 265 #define REG_CLASS_CONTENTS {                                            \
 266   {0x00000000,0x00000000},      /* NO_REGS */                           \
 267   {0x00000001,0x00000000},      /* R0_REG */                            \
 268   {3 << REG_X,0x00000000},      /* POINTER_X_REGS, r26 - r27 */         \
 269   {3 << REG_Y,0x00000000},      /* POINTER_Y_REGS, r28 - r29 */         \
 270   {3 << REG_Z,0x00000000},      /* POINTER_Z_REGS, r30 - r31 */         \
 271   {0x00000000,0x00000003},      /* STACK_REG, STACK */                  \
 272   {(3 << REG_Y) | (3 << REG_Z),                                         \
 273      0x00000000},               /* BASE_POINTER_REGS, r28 - r31 */      \
 274   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z),                          \
 275      0x00000000},               /* POINTER_REGS, r26 - r31 */           \
 276   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z) | (3 << REG_W),           \
 277      0x00000000},               /* ADDW_REGS, r24 - r31 */              \
 278   {0x00ff0000,0x00000000},      /* SIMPLE_LD_REGS r16 - r23 */          \
 279   {(3 << REG_X)|(3 << REG_Y)|(3 << REG_Z)|(3 << REG_W)|(0xff << 16),    \
 280      0x00000000},       /* LD_REGS, r16 - r31 */                        \
 281   {0x0000ffff,0x00000000},      /* NO_LD_REGS  r0 - r15 */              \
 282   {0xffffffff,0x00000000},      /* GENERAL_REGS, r0 - r31 */            \
 283   {0xffffffff,0x00000003}       /* ALL_REGS */                          \
 284 }
 285
 286 #define REGNO_REG_CLASS(R) avr_regno_reg_class(R)
 287
 288 #define BASE_REG_CLASS (reload_completed ? BASE_POINTER_REGS : POINTER_REGS)
 289
 290 #define INDEX_REG_CLASS NO_REGS
 291
 292 #define REG_CLASS_FROM_LETTER(C) avr_reg_class_from_letter(C)
 293
 294 #define REGNO_OK_FOR_BASE_P(r) (((r) < FIRST_PSEUDO_REGISTER            \
 295                                  && ((r) == REG_X                       \
 296                                      || (r) == REG_Y                    \
 297                                      || (r) == REG_Z                    \
 298                                      || (r) == ARG_POINTER_REGNUM))     \
 299                                 || (reg_renumber                        \
 300                                     && (reg_renumber[r] == REG_X        \
 301                                         || reg_renumber[r] == REG_Y     \
 302                                         || reg_renumber[r] == REG_Z     \
 303                                         || (reg_renumber[r]             \
 304                                             == ARG_POINTER_REGNUM))))
 305
 306 #define REGNO_OK_FOR_INDEX_P(NUM) 0
 307
 308 #define PREFERRED_RELOAD_CLASS(X, CLASS) preferred_reload_class(X,CLASS)
 309
 310 #define SMALL_REGISTER_CLASSES 1
 311
 312 #define CLASS_LIKELY_SPILLED_P(c) class_likely_spilled_p(c)
 313
 314 #define CLASS_MAX_NREGS(CLASS, MODE)   class_max_nregs (CLASS, MODE)
 315
 316 #define CONST_OK_FOR_LETTER_P(VALUE, C)                         \
 317   ((C) == 'I' ? (VALUE) >= 0 && (VALUE) <= 63 :                 \
 318    (C) == 'J' ? (VALUE) <= 0 && (VALUE) >= -63:                 \
 319    (C) == 'K' ? (VALUE) == 2 :                                  \
 320    (C) == 'L' ? (VALUE) == 0 :                                  \
 321    (C) == 'M' ? (VALUE) >= 0 && (VALUE) <= 0xff :               \
 322    (C) == 'N' ? (VALUE) == -1:                                  \
 323    (C) == 'O' ? (VALUE) == 8 || (VALUE) == 16 || (VALUE) == 24: \
 324    (C) == 'P' ? (VALUE) == 1 :                                  \
 325    0)
 326
 327 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
 328   ((C) == 'G' ? (VALUE) == CONST0_RTX (SFmode)  \
 329    : 0)
 330
 331 #define EXTRA_CONSTRAINT(x, c) extra_constraint(x, c)
 332
 333 #define STACK_PUSH_CODE POST_DEC
 334
 335 #define STACK_GROWS_DOWNWARD
 336
 337 #define STARTING_FRAME_OFFSET 1
 338
 339 #define STACK_POINTER_OFFSET 1
 340
 341 #define FIRST_PARM_OFFSET(FUNDECL) 0
 342
 343 #define STACK_BOUNDARY 8
 344
 345 #define STACK_POINTER_REGNUM 32
 346
 347 #define FRAME_POINTER_REGNUM REG_Y
 348
 349 #define ARG_POINTER_REGNUM 34
 350
 351 #define STATIC_CHAIN_REGNUM 2
 352
 353 #define FRAME_POINTER_REQUIRED frame_pointer_required_p()
 354
 355 #define ELIMINABLE_REGS {                                       \
 356       {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},               \
 357         {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}            \
 358        ,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}}
 359
 360 #define CAN_ELIMINATE(FROM, TO) (((FROM) == ARG_POINTER_REGNUM             \
 361                                   && (TO) == FRAME_POINTER_REGNUM)         \
 362                                  || (((FROM) == FRAME_POINTER_REGNUM       \
 363                                       || (FROM) == FRAME_POINTER_REGNUM+1) \
 364                                      && ! FRAME_POINTER_REQUIRED           \
 365                                      ))
 366
 367 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                    \
 368      OFFSET = initial_elimination_offset (FROM, TO)
 369
 370 #define RETURN_ADDR_RTX(count, x) \
 371   gen_rtx_MEM (Pmode, memory_address (Pmode, plus_constant (tem, 1)))
 372
 373 #define PUSH_ROUNDING(NPUSHED) (NPUSHED)
 374
 375 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
 376
 377 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) (function_arg (&(CUM), MODE, TYPE, NAMED))
 378
 379 typedef struct avr_args {
 380   int nregs;                    /* # registers available for passing */
 381   int regno;                    /* next available register number */
 382 } CUMULATIVE_ARGS;
 383
 384 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
 385   init_cumulative_args (&(CUM), FNTYPE, LIBNAME, FNDECL)
 386
 387 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)    \
 388   (function_arg_advance (&CUM, MODE, TYPE, NAMED))
 389
 390 #define FUNCTION_ARG_REGNO_P(r) function_arg_regno_p(r)
 391
 392 extern int avr_reg_order[];
 393
 394 #define RET_REGISTER avr_ret_register ()
 395
 396 #define FUNCTION_VALUE(VALTYPE, FUNC) avr_function_value (VALTYPE, FUNC)
 397
 398 #define LIBCALL_VALUE(MODE)  avr_libcall_value (MODE)
 399
 400 #define FUNCTION_VALUE_REGNO_P(N) ((int) (N) == RET_REGISTER)
 401
 402 #define DEFAULT_PCC_STRUCT_RETURN 0
 403
 404 #define EPILOGUE_USES(REGNO) 0
 405
 406 #define HAVE_POST_INCREMENT 1
 407 #define HAVE_PRE_DECREMENT 1
 408
 409 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
 410
 411 #define MAX_REGS_PER_ADDRESS 1
 412
 413 #ifdef REG_OK_STRICT
 414 #  define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
 415 {                                                       \
 416   if (legitimate_address_p (mode, operand, 1))          \
 417     goto ADDR;                                          \
 418 }
 419 #  else
 420 #  define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
 421 {                                                       \
 422   if (legitimate_address_p (mode, operand, 0))          \
 423     goto ADDR;                                          \
 424 }
 425 #endif
 426
 427 #define REG_OK_FOR_BASE_NOSTRICT_P(X) \
 428   (REGNO (X) >= FIRST_PSEUDO_REGISTER || REG_OK_FOR_BASE_STRICT_P(X))
 429
 430 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
 431
 432 #ifdef REG_OK_STRICT
 433 #  define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P (X)
 434 #else
 435 #  define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NOSTRICT_P (X)
 436 #endif
 437
 438 #define REG_OK_FOR_INDEX_P(X) 0
 439
 440 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)                          \
 441 {                                                                       \
 442   (X) = legitimize_address (X, OLDX, MODE);                             \
 443   if (memory_address_p (MODE, X))                                       \
 444     goto WIN;                                                           \
 445 }
 446
 447 #define XEXP_(X,Y) (X)
 448 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN)    \
 449 do {                                                                        \
 450   if (1&&(GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC))     \
 451     {                                                                       \
 452       push_reload (XEXP (X,0), XEXP (X,0), &XEXP (X,0), &XEXP (X,0),        \
 453                    POINTER_REGS, GET_MODE (X),GET_MODE (X) , 0, 0,          \
 454                    OPNUM, RELOAD_OTHER);                                    \
 455       goto WIN;                                                             \
 456     }                                                                       \
 457   if (GET_CODE (X) == PLUS                                                  \
 458       && REG_P (XEXP (X, 0))                                                \
 459       && GET_CODE (XEXP (X, 1)) == CONST_INT                                \
 460       && INTVAL (XEXP (X, 1)) >= 1)                                         \
 461     {                                                                       \
 462       int fit = INTVAL (XEXP (X, 1)) <= (64 - GET_MODE_SIZE (MODE));        \
 463       if (fit)                                                              \
 464         {                                                                   \
 465           if (reg_equiv_address[REGNO (XEXP (X, 0))] != 0)                  \
 466             {                                                               \
 467               int regno = REGNO (XEXP (X, 0));                              \
 468               rtx mem = make_memloc (X, regno);                             \
 469               push_reload (XEXP (mem,0), NULL, &XEXP (mem,0), NULL,         \
 470                            POINTER_REGS, Pmode, VOIDmode, 0, 0,             \
 471                            1, ADDR_TYPE (TYPE));                            \
 472               push_reload (mem, NULL_RTX, &XEXP (X, 0), NULL,               \
 473                            BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
 474                            OPNUM, TYPE);                                    \
 475               goto WIN;                                                     \
 476             }                                                               \
 477           push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL,           \
 478                        BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0,     \
 479                        OPNUM, TYPE);                                        \
 480           goto WIN;                                                         \
 481         }                                                                   \
 482       else if (! (frame_pointer_needed && XEXP (X,0) == frame_pointer_rtx)) \
 483         {                                                                   \
 484           push_reload (X, NULL_RTX, &X, NULL,                               \
 485                        POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0,          \
 486                        OPNUM, TYPE);                                        \
 487           goto WIN;                                                         \
 488         }                                                                   \
 489     }                                                                       \
 490 } while(0)
 491
 492 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)                        \
 493       if (GET_CODE (ADDR) == POST_INC || GET_CODE (ADDR) == PRE_DEC)    \
 494         goto LABEL
 495
 496 #define LEGITIMATE_CONSTANT_P(X) 1
 497
 498 #define REGISTER_MOVE_COST(MODE, FROM, TO) ((FROM) == STACK_REG ? 6 \
 499                                             : (TO) == STACK_REG ? 12 \
 500                                             : 2)
 501
 502 #define MEMORY_MOVE_COST(MODE,CLASS,IN) ((MODE)==QImode ? 2 :   \
 503                                          (MODE)==HImode ? 4 :   \
 504                                          (MODE)==SImode ? 8 :   \
 505                                          (MODE)==SFmode ? 8 : 16)
 506
 507 #define BRANCH_COST 0
 508
 509 #define SLOW_BYTE_ACCESS 0
 510
 511 #define NO_FUNCTION_CSE
 512
 513 #define NO_RECURSIVE_FUNCTION_CSE
 514
 515 #define TEXT_SECTION_ASM_OP "\t.text"
 516
 517 #define DATA_SECTION_ASM_OP "\t.data"
 518
 519 #define BSS_SECTION_ASM_OP "\t.section .bss"
 520
 521 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
 522    There are no shared libraries on this target, and these sections are
 523    placed in the read-only program memory, so they are not writable.  */
 524
 525 #undef CTORS_SECTION_ASM_OP
 526 #define CTORS_SECTION_ASM_OP "\t.section .ctors,\"a\",@progbits"
 527
 528 #undef DTORS_SECTION_ASM_OP
 529 #define DTORS_SECTION_ASM_OP "\t.section .dtors,\"a\",@progbits"
 530
 531 #define TARGET_ASM_CONSTRUCTOR avr_asm_out_ctor
 532
 533 #define TARGET_ASM_DESTRUCTOR avr_asm_out_dtor
 534
 535 #define EXTRA_SECTIONS in_progmem
 536
 537 #define EXTRA_SECTION_FUNCTIONS                                               \
 538                                                                               \
 539 void                                                                          \
 540 progmem_section (void)                                                        \
 541 {                                                                             \
 542   if (in_section != in_progmem)                                               \
 543     {                                                                         \
 544       fprintf (asm_out_file,                                                  \
 545                "\t.section .progmem.gcc_sw_table, \"%s\", @progbits\n",       \
 546                AVR_MEGA ? "a" : "ax");                                        \
 547       /* Should already be aligned, this is just to be safe if it isn't.  */  \
 548       fprintf (asm_out_file, "\t.p2align 1\n");                               \
 549       in_section = in_progmem;                                                \
 550     }                                                                         \
 551 }
 552
 553 #define READONLY_DATA_SECTION data_section
 554
 555 #define JUMP_TABLES_IN_TEXT_SECTION 0
 556
 557 #define ASM_COMMENT_START " ; "
 558
 559 #define ASM_APP_ON "/* #APP */\n"
 560
 561 #define ASM_APP_OFF "/* #NOAPP */\n"
 562
 563 #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE, COUNTER) \
 564   fprintf (STREAM,"/* line: %d */\n",LINE)
 565
 566 /* Switch into a generic section.  */
 567 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
 568
 569 #define ASM_OUTPUT_ASCII(FILE, P, SIZE)  gas_output_ascii (FILE,P,SIZE)
 570
 571 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == '\n'                    \
 572                                           || ((C) == '$'))
 573
 574 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)                     \
 575 do {                                                                       \
 576      fputs ("\t.comm ", (STREAM));                                         \
 577      assemble_name ((STREAM), (NAME));                                     \
 578      fprintf ((STREAM), ",%lu,1\n", (unsigned long)(SIZE));                \
 579 } while (0)
 580
 581 #define ASM_OUTPUT_BSS(FILE, DECL, NAME, SIZE, ROUNDED)                 \
 582   asm_output_bss ((FILE), (DECL), (NAME), (SIZE), (ROUNDED))
 583
 584 #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED)                   \
 585 do {                                                                    \
 586      fputs ("\t.lcomm ", (STREAM));                                     \
 587      assemble_name ((STREAM), (NAME));                                  \
 588      fprintf ((STREAM), ",%d\n", (int)(SIZE));                          \
 589 } while (0)
 590
 591 #undef TYPE_ASM_OP
 592 #undef SIZE_ASM_OP
 593 #undef WEAK_ASM_OP
 594 #define TYPE_ASM_OP     "\t.type\t"
 595 #define SIZE_ASM_OP     "\t.size\t"
 596 #define WEAK_ASM_OP     "\t.weak\t"
 597 /* Define the strings used for the special svr4 .type and .size directives.
 598    These strings generally do not vary from one system running svr4 to
 599    another, but if a given system (e.g. m88k running svr) needs to use
 600    different pseudo-op names for these, they may be overridden in the
 601    file which includes this one.  */
 602
 603
 604 #undef TYPE_OPERAND_FMT
 605 #define TYPE_OPERAND_FMT        "@%s"
 606 /* The following macro defines the format used to output the second
 607    operand of the .type assembler directive.  Different svr4 assemblers
 608    expect various different forms for this operand.  The one given here
 609    is just a default.  You may need to override it in your machine-
 610    specific tm.h file (depending upon the particulars of your assembler).  */
 611
 612 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 613 do {                                                            \
 614      ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");        \
 615      ASM_OUTPUT_LABEL (FILE, NAME);                             \
 616 } while (0)
 617
 618 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)                    \
 619   do {                                                                  \
 620     if (!flag_inhibit_size_directive)                                   \
 621       ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                           \
 622   } while (0)
 623
 624 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 625 do {                                                                    \
 626   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");                     \
 627   size_directive_output = 0;                                            \
 628   if (!flag_inhibit_size_directive && DECL_SIZE (DECL))                 \
 629     {                                                                   \
 630       size_directive_output = 1;                                        \
 631       ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME,                            \
 632                                  int_size_in_bytes (TREE_TYPE (DECL))); \
 633     }                                                                   \
 634   ASM_OUTPUT_LABEL(FILE, NAME);                                         \
 635 } while (0)
 636
 637 #undef ASM_FINISH_DECLARE_OBJECT
 638 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)         \
 639 do {                                                                     \
 640      const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);             \
 641      HOST_WIDE_INT size;                                                 \
 642      if (!flag_inhibit_size_directive && DECL_SIZE (DECL)                \
 643          && ! AT_END && TOP_LEVEL                                        \
 644          && DECL_INITIAL (DECL) == error_mark_node                       \
 645          && !size_directive_output)                                      \
 646        {                                                                 \
 647          size_directive_output = 1;                                      \
 648          size = int_size_in_bytes (TREE_TYPE (DECL));                    \
 649          ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size);                   \
 650        }                                                                 \
 651    } while (0)
 652
 653
 654 #define ESCAPES \
 655 "\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\
 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\
 658 \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\
 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 \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"
 663 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
 664    ASM_OUTPUT_LIMITED_STRING macros.  Each byte in the table
 665    corresponds to a particular byte value [0..255].  For any
 666    given byte value, if the value in the corresponding table
 667    position is zero, the given character can be output directly.
 668    If the table value is 1, the byte must be output as a \ooo
 669    octal escape.  If the tables value is anything else, then the
 670    byte value should be output as a \ followed by the value
 671    in the table.  Note that we can use standard UN*X escape
 672    sequences for many control characters, but we don't use
 673    \a to represent BEL because some svr4 assemblers (e.g. on
 674    the i386) don't know about that.  Also, we don't use \v
 675    since some versions of gas, such as 2.2 did not accept it.  */
 676
 677 #define STRING_LIMIT    ((unsigned) 64)
 678 #define STRING_ASM_OP   "\t.string\t"
 679 /* Some svr4 assemblers have a limit on the number of characters which
 680    can appear in the operand of a .string directive.  If your assembler
 681    has such a limitation, you should define STRING_LIMIT to reflect that
 682    limit.  Note that at least some svr4 assemblers have a limit on the
 683    actual number of bytes in the double-quoted string, and that they
 684    count each character in an escape sequence as one byte.  Thus, an
 685    escape sequence like \377 would count as four bytes.
 686
 687    If your target assembler doesn't support the .string directive, you
 688    should define this to zero.  */
 689
 690 /* Globalizing directive for a label.  */
 691 #define GLOBAL_ASM_OP ".global\t"
 692
 693 #define ASM_WEAKEN_LABEL(FILE, NAME)    \
 694   do                                    \
 695     {                                   \
 696       fputs ("\t.weak\t", (FILE));      \
 697       assemble_name ((FILE), (NAME));   \
 698       fputc ('\n', (FILE));             \
 699     }                                   \
 700   while (0)
 701
 702 #define SUPPORTS_WEAK 1
 703
 704 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)        \
 705 sprintf (STRING, "*.%s%lu", PREFIX, (unsigned long)(NUM))
 706
 707 #define HAS_INIT_SECTION 1
 708
 709 #define REGISTER_NAMES {                                \
 710   "r0","r1","r2","r3","r4","r5","r6","r7",              \
 711     "r8","r9","r10","r11","r12","r13","r14","r15",      \
 712     "r16","r17","r18","r19","r20","r21","r22","r23",    \
 713     "r24","r25","r26","r27","r28","r29","r30","r31",    \
 714     "__SPL__","__SPH__","argL","argH"}
 715
 716 #define FINAL_PRESCAN_INSN(insn, operand, nop) final_prescan_insn (insn, operand,nop)
 717
 718 #define PRINT_OPERAND(STREAM, X, CODE) print_operand (STREAM, X, CODE)
 719
 720 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '~')
 721
 722 #define PRINT_OPERAND_ADDRESS(STREAM, X) print_operand_address(STREAM, X)
 723
 724 #define USER_LABEL_PREFIX ""
 725
 726 #define ASSEMBLER_DIALECT AVR_ENHANCED
 727
 728 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO)      \
 729 {                                               \
 730   if (REGNO > 31)                               \
 731     abort ();                                   \
 732   fprintf (STREAM, "\tpush\tr%d", REGNO);       \
 733 }
 734
 735 #define ASM_OUTPUT_REG_POP(STREAM, REGNO)       \
 736 {                                               \
 737   if (REGNO > 31)                               \
 738     abort ();                                   \
 739   fprintf (STREAM, "\tpop\tr%d", REGNO);        \
 740 }
 741
 742 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)          \
 743   avr_output_addr_vec_elt(STREAM, VALUE)
 744
 745 #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) \
 746   progmem_section (), (*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
 753 #define CASE_VECTOR_MODE HImode
 754
 755 extern int avr_case_values_threshold;
 756
 757 #define CASE_VALUES_THRESHOLD avr_case_values_threshold
 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      /*                            1        3 */
 770 #define INTEGRATE_THRESHOLD(DECL) (1 + (3 * list_length (DECL_ARGUMENTS (DECL)) / 2))
 771
 772 #define DOLLARS_IN_IDENTIFIERS 0
 773
 774 #define NO_DOLLAR_IN_LABEL 1
 775
 776 #define TRAMPOLINE_TEMPLATE(FILE) \
 777   internal_error ("trampolines not supported")
 778
 779 #define TRAMPOLINE_SIZE 4
 780
 781 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)                             \
 782 {                                                                             \
 783   emit_move_insn (gen_rtx_MEM (HImode, plus_constant ((TRAMP), 2)), CXT);    \
 784   emit_move_insn (gen_rtx_MEM (HImode, plus_constant ((TRAMP), 6)), FNADDR); \
 785 }
 786 /* Store in cc_status the expressions
 787    that the condition codes will describe
 788    after execution of an instruction whose pattern is EXP.
 789    Do not alter them if the instruction would not alter the cc's.  */
 790
 791 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
 792
 793 /* The add insns don't set overflow in a usable way.  */
 794 #define CC_OVERFLOW_UNUSABLE 01000
 795 /* The mov,and,or,xor insns don't set carry.  That's ok though as the
 796    Z bit is all we need when doing unsigned comparisons on the result of
 797    these insns (since they're always with 0).  However, conditions.h has
 798    CC_NO_OVERFLOW defined for this purpose.  Rename it to something more
 799    understandable.  */
 800 #define CC_NO_CARRY CC_NO_OVERFLOW
 801
 802
 803 /* Output assembler code to FILE to increment profiler label # LABELNO
 804    for profiling a function entry.  */
 805
 806 #define FUNCTION_PROFILER(FILE, LABELNO)  \
 807   fprintf (FILE, "/* profiler %d */", (LABELNO))
 808
 809 #define ADJUST_INSN_LENGTH(INSN, LENGTH) (LENGTH =\
 810                                           adjust_insn_length (INSN, LENGTH))
 811
 812 #define TARGET_MEM_FUNCTIONS
 813
 814 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE}"
 815
 816 #define CC1_SPEC "%{profile:-p}"
 817
 818 #define CC1PLUS_SPEC "%{!frtti:-fno-rtti} \
 819     %{!fenforce-eh-specs:-fno-enforce-eh-specs} \
 820     %{!fexceptions:-fno-exceptions}"
 821 /* A C string constant that tells the GCC drvier program options to
 822    pass to `cc1plus'.  */
 823
 824 #define ASM_SPEC "%{mmcu=*:-mmcu=%*}"
 825
 826 #define LINK_SPEC " %{!mmcu*:-m avr2}\
 827 %{mmcu=at90s1200|mmcu=attiny1*|mmcu=attiny28:-m avr1} \
 828 %{mmcu=attiny22|mmcu=attiny26|mmcu=at90s2*|mmcu=at90s4*|mmcu=at90s8*|mmcu=at90c8*|mmcu=at86rf401:-m avr2}\
 829 %{mmcu=atmega103|mmcu=atmega603|mmcu=at43*|mmcu=at76*:-m avr3}\
 830 %{mmcu=atmega8*:-m avr4}\
 831 %{mmcu=atmega16*|mmcu=atmega32*|mmcu=atmega64|mmcu=atmega128|mmcu=at94k:-m avr5}\
 832 %{mmcu=atmega64|mmcu=atmega128|mmcu=atmega162|mmcu=atmega169: -Tdata 0x800100} "
 833
 834 #define LIB_SPEC \
 835   "%{!mmcu=at90s1*:%{!mmcu=attiny1*:%{!mmcu=attiny28: -lc }}}"
 836
 837 #define LIBSTDCXX "-lgcc"
 838 /* No libstdc++ for now.  Empty string doesn't work.  */
 839
 840 #define LIBGCC_SPEC \
 841   "%{!mmcu=at90s1*:%{!mmcu=attiny1*:%{!mmcu=attiny28: -lgcc }}}"
 842
 843 #define STARTFILE_SPEC "%(crt_binutils)"
 844
 845 #define ENDFILE_SPEC ""
 846
 847 #define CRT_BINUTILS_SPECS "\
 848 %{mmcu=at90s1200|mmcu=avr1:crts1200.o%s} \
 849 %{mmcu=attiny11:crttn11.o%s} \
 850 %{mmcu=attiny12:crttn12.o%s} \
 851 %{mmcu=attiny15:crttn15.o%s} \
 852 %{mmcu=attiny28:crttn28.o%s} \
 853 %{!mmcu*|mmcu=at90s8515|mmcu=avr2:crts8515.o%s} \
 854 %{mmcu=at90s2313:crts2313.o%s} \
 855 %{mmcu=at90s2323:crts2323.o%s} \
 856 %{mmcu=at90s2333:crts2333.o%s} \
 857 %{mmcu=at90s2343:crts2343.o%s} \
 858 %{mmcu=attiny22:crttn22.o%s} \
 859 %{mmcu=attiny26:crttn26.o%s} \
 860 %{mmcu=at90s4433:crts4433.o%s} \
 861 %{mmcu=at90s4414:crts4414.o%s} \
 862 %{mmcu=at90s4434:crts4434.o%s} \
 863 %{mmcu=at90c8534:crtc8534.o%s} \
 864 %{mmcu=at90s8535:crts8535.o%s} \
 865 %{mmcu=at86rf401:crt86401.o%s} \
 866 %{mmcu=atmega103|mmcu=avr3:crtm103.o%s} \
 867 %{mmcu=atmega603:crtm603.o%s} \
 868 %{mmcu=at43usb320:crt43320.o%s} \
 869 %{mmcu=at43usb355:crt43355.o%s} \
 870 %{mmcu=at76c711:crt76711.o%s} \
 871 %{mmcu=atmega8|mmcu=avr4:crtm8.o%s} \
 872 %{mmcu=atmega8515:crtm8515.o%s} \
 873 %{mmcu=atmega8535:crtm8535.o%s} \
 874 %{mmcu=atmega16:crtm16.o%s} \
 875 %{mmcu=atmega161|mmcu=avr5:crtm161.o%s} \
 876 %{mmcu=atmega162:crtm162.o%s} \
 877 %{mmcu=atmega163:crtm163.o%s} \
 878 %{mmcu=atmega169:crtm169.o%s} \
 879 %{mmcu=atmega32:crtm32.o%s} \
 880 %{mmcu=atmega323:crtm323.o%s} \
 881 %{mmcu=atmega64:crtm64.o%s} \
 882 %{mmcu=atmega128:crtm128.o%s} \
 883 %{mmcu=at94k:crtat94k.o%s}"
 884
 885 #define EXTRA_SPECS {"crt_binutils", CRT_BINUTILS_SPECS},
 886
 887 /* This is the default without any -mmcu=* option (AT90S*).  */
 888 #define MULTILIB_DEFAULTS { "mmcu=avr2" }
 889
 890 /* This is undefined macro for collect2 disabling */
 891 #define LINKER_NAME "ld"
 892
 893 #define TEST_HARD_REG_CLASS(CLASS, REGNO) \
 894   TEST_HARD_REG_BIT (reg_class_contents[ (int) (CLASS)], REGNO)
 895
 896 /* Note that the other files fail to use these
 897    in some of the places where they should.  */
 898
 899 #if defined(__STDC__) || defined(ALMOST_STDC)
 900 #define AS2(a,b,c) #a " " #b "," #c
 901 #define AS2C(b,c) " " #b "," #c
 902 #define AS3(a,b,c,d) #a " " #b "," #c "," #d
 903 #define AS1(a,b) #a " " #b
 904 #else
 905 #define AS1(a,b) "a     b"
 906 #define AS2(a,b,c) "a   b,c"
 907 #define AS2C(b,c) " b,c"
 908 #define AS3(a,b,c,d) "a b,c,d"
 909 #endif
 910 #define OUT_AS1(a,b) output_asm_insn (AS1(a,b), operands)
 911 #define OUT_AS2(a,b,c) output_asm_insn (AS2(a,b,c), operands)
 912 #define CR_TAB "\n\t"
 913
 914 /* Temporary register r0 */
 915 #define TMP_REGNO 0
 916
 917 /* zero register r1 */
 918 #define ZERO_REGNO 1
 919
 920 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG