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 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 NON_SAVING_SETJMP 0
 200
 201 #define REG_ALLOC_ORDER {                       \
 202     24,25,                                      \
 203     18,19,                                      \
 204     20,21,                                      \
 205     22,23,                                      \
 206     30,31,                                      \
 207     26,27,                                      \
 208     28,29,                                      \
 209     17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,    \
 210     0,1,                                        \
 211     32,33,34,35                                 \
 212     }
 213
 214 #define ORDER_REGS_FOR_LOCAL_ALLOC order_regs_for_local_alloc ()
 215
 216
 217 #define HARD_REGNO_NREGS(REGNO, MODE) ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
 218
 219 #define HARD_REGNO_MODE_OK(REGNO, MODE) avr_hard_regno_mode_ok(REGNO, MODE)
 220
 221 #define MODES_TIEABLE_P(MODE1, MODE2) 0
 222
 223 enum reg_class {
 224   NO_REGS,
 225   R0_REG,                       /* r0 */
 226   POINTER_X_REGS,               /* r26 - r27 */
 227   POINTER_Y_REGS,               /* r28 - r29 */
 228   POINTER_Z_REGS,               /* r30 - r31 */
 229   STACK_REG,                    /* STACK */
 230   BASE_POINTER_REGS,            /* r28 - r31 */
 231   POINTER_REGS,                 /* r26 - r31 */
 232   ADDW_REGS,                    /* r24 - r31 */
 233   SIMPLE_LD_REGS,               /* r16 - r23 */
 234   LD_REGS,                      /* r16 - r31 */
 235   NO_LD_REGS,                   /* r0 - r15 */
 236   GENERAL_REGS,                 /* r0 - r31 */
 237   ALL_REGS, LIM_REG_CLASSES
 238 };
 239
 240
 241 #define N_REG_CLASSES (int)LIM_REG_CLASSES
 242
 243 #define REG_CLASS_NAMES {                                       \
 244                  "NO_REGS",                                     \
 245                    "R0_REG",    /* r0 */                        \
 246                    "POINTER_X_REGS", /* r26 - r27 */            \
 247                    "POINTER_Y_REGS", /* r28 - r29 */            \
 248                    "POINTER_Z_REGS", /* r30 - r31 */            \
 249                    "STACK_REG", /* STACK */                     \
 250                    "BASE_POINTER_REGS", /* r28 - r31 */         \
 251                    "POINTER_REGS", /* r26 - r31 */              \
 252                    "ADDW_REGS", /* r24 - r31 */                 \
 253                    "SIMPLE_LD_REGS", /* r16 - r23 */            \
 254                    "LD_REGS",   /* r16 - r31 */                 \
 255                    "NO_LD_REGS", /* r0 - r15 */                 \
 256                    "GENERAL_REGS", /* r0 - r31 */               \
 257                    "ALL_REGS" }
 258
 259 #define REG_X 26
 260 #define REG_Y 28
 261 #define REG_Z 30
 262 #define REG_W 24
 263
 264 #define REG_CLASS_CONTENTS {                                            \
 265   {0x00000000,0x00000000},      /* NO_REGS */                           \
 266   {0x00000001,0x00000000},      /* R0_REG */                            \
 267   {3 << REG_X,0x00000000},      /* POINTER_X_REGS, r26 - r27 */         \
 268   {3 << REG_Y,0x00000000},      /* POINTER_Y_REGS, r28 - r29 */         \
 269   {3 << REG_Z,0x00000000},      /* POINTER_Z_REGS, r30 - r31 */         \
 270   {0x00000000,0x00000003},      /* STACK_REG, STACK */                  \
 271   {(3 << REG_Y) | (3 << REG_Z),                                         \
 272      0x00000000},               /* BASE_POINTER_REGS, r28 - r31 */      \
 273   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z),                          \
 274      0x00000000},               /* POINTER_REGS, r26 - r31 */           \
 275   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z) | (3 << REG_W),           \
 276      0x00000000},               /* ADDW_REGS, r24 - r31 */              \
 277   {0x00ff0000,0x00000000},      /* SIMPLE_LD_REGS r16 - r23 */          \
 278   {(3 << REG_X)|(3 << REG_Y)|(3 << REG_Z)|(3 << REG_W)|(0xff << 16),    \
 279      0x00000000},       /* LD_REGS, r16 - r31 */                        \
 280   {0x0000ffff,0x00000000},      /* NO_LD_REGS  r0 - r15 */              \
 281   {0xffffffff,0x00000000},      /* GENERAL_REGS, r0 - r31 */            \
 282   {0xffffffff,0x00000003}       /* ALL_REGS */                          \
 283 }
 284
 285 #define REGNO_REG_CLASS(R) avr_regno_reg_class(R)
 286
 287 #define BASE_REG_CLASS (reload_completed ? BASE_POINTER_REGS : POINTER_REGS)
 288
 289 #define INDEX_REG_CLASS NO_REGS
 290
 291 #define REG_CLASS_FROM_LETTER(C) avr_reg_class_from_letter(C)
 292
 293 #define REGNO_OK_FOR_BASE_P(r) (((r) < FIRST_PSEUDO_REGISTER            \
 294                                  && ((r) == REG_X                       \
 295                                      || (r) == REG_Y                    \
 296                                      || (r) == REG_Z                    \
 297                                      || (r) == ARG_POINTER_REGNUM))     \
 298                                 || (reg_renumber                        \
 299                                     && (reg_renumber[r] == REG_X        \
 300                                         || reg_renumber[r] == REG_Y     \
 301                                         || reg_renumber[r] == REG_Z     \
 302                                         || (reg_renumber[r]             \
 303                                             == ARG_POINTER_REGNUM))))
 304
 305 #define REGNO_OK_FOR_INDEX_P(NUM) 0
 306
 307 #define PREFERRED_RELOAD_CLASS(X, CLASS) preferred_reload_class(X,CLASS)
 308
 309 #define SMALL_REGISTER_CLASSES 1
 310
 311 #define CLASS_LIKELY_SPILLED_P(c) class_likely_spilled_p(c)
 312
 313 #define CLASS_MAX_NREGS(CLASS, MODE)   class_max_nregs (CLASS, MODE)
 314
 315 #define CONST_OK_FOR_LETTER_P(VALUE, C)                         \
 316   ((C) == 'I' ? (VALUE) >= 0 && (VALUE) <= 63 :                 \
 317    (C) == 'J' ? (VALUE) <= 0 && (VALUE) >= -63:                 \
 318    (C) == 'K' ? (VALUE) == 2 :                                  \
 319    (C) == 'L' ? (VALUE) == 0 :                                  \
 320    (C) == 'M' ? (VALUE) >= 0 && (VALUE) <= 0xff :               \
 321    (C) == 'N' ? (VALUE) == -1:                                  \
 322    (C) == 'O' ? (VALUE) == 8 || (VALUE) == 16 || (VALUE) == 24: \
 323    (C) == 'P' ? (VALUE) == 1 :                                  \
 324    0)
 325
 326 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
 327   ((C) == 'G' ? (VALUE) == CONST0_RTX (SFmode)  \
 328    : 0)
 329
 330 #define EXTRA_CONSTRAINT(x, c) extra_constraint(x, c)
 331
 332 #define STACK_PUSH_CODE POST_DEC
 333
 334 #define STACK_GROWS_DOWNWARD
 335
 336 #define STARTING_FRAME_OFFSET 1
 337
 338 #define STACK_POINTER_OFFSET 1
 339
 340 #define FIRST_PARM_OFFSET(FUNDECL) 0
 341
 342 #define STACK_BOUNDARY 8
 343
 344 #define STACK_POINTER_REGNUM 32
 345
 346 #define FRAME_POINTER_REGNUM REG_Y
 347
 348 #define ARG_POINTER_REGNUM 34
 349
 350 #define STATIC_CHAIN_REGNUM 2
 351
 352 #define FRAME_POINTER_REQUIRED frame_pointer_required_p()
 353
 354 #define ELIMINABLE_REGS {                                       \
 355       {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},               \
 356         {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}            \
 357        ,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}}
 358
 359 #define CAN_ELIMINATE(FROM, TO) (((FROM) == ARG_POINTER_REGNUM             \
 360                                   && (TO) == FRAME_POINTER_REGNUM)         \
 361                                  || (((FROM) == FRAME_POINTER_REGNUM       \
 362                                       || (FROM) == FRAME_POINTER_REGNUM+1) \
 363                                      && ! FRAME_POINTER_REQUIRED           \
 364                                      ))
 365
 366 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                    \
 367      OFFSET = initial_elimination_offset (FROM, TO)
 368
 369 #define RETURN_ADDR_RTX(count, x) \
 370   gen_rtx_MEM (Pmode, memory_address (Pmode, plus_constant (tem, 1)))
 371
 372 #define PUSH_ROUNDING(NPUSHED) (NPUSHED)
 373
 374 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
 375
 376 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) (function_arg (&(CUM), MODE, TYPE, NAMED))
 377
 378 typedef struct avr_args {
 379   int nregs;                    /* # registers available for passing */
 380   int regno;                    /* next available register number */
 381 } CUMULATIVE_ARGS;
 382
 383 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
 384   init_cumulative_args (&(CUM), FNTYPE, LIBNAME, FNDECL)
 385
 386 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)    \
 387   (function_arg_advance (&CUM, MODE, TYPE, NAMED))
 388
 389 #define FUNCTION_ARG_REGNO_P(r) function_arg_regno_p(r)
 390
 391 extern int avr_reg_order[];
 392
 393 #define RET_REGISTER avr_ret_register ()
 394
 395 #define FUNCTION_VALUE(VALTYPE, FUNC) avr_function_value (VALTYPE, FUNC)
 396
 397 #define LIBCALL_VALUE(MODE)  avr_libcall_value (MODE)
 398
 399 #define FUNCTION_VALUE_REGNO_P(N) ((int) (N) == RET_REGISTER)
 400
 401 #define DEFAULT_PCC_STRUCT_RETURN 0
 402
 403 #define EPILOGUE_USES(REGNO) 0
 404
 405 #define HAVE_POST_INCREMENT 1
 406 #define HAVE_PRE_DECREMENT 1
 407
 408 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
 409
 410 #define MAX_REGS_PER_ADDRESS 1
 411
 412 #ifdef REG_OK_STRICT
 413 #  define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
 414 {                                                       \
 415   if (legitimate_address_p (mode, operand, 1))          \
 416     goto ADDR;                                          \
 417 }
 418 #  else
 419 #  define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
 420 {                                                       \
 421   if (legitimate_address_p (mode, operand, 0))          \
 422     goto ADDR;                                          \
 423 }
 424 #endif
 425
 426 #define REG_OK_FOR_BASE_NOSTRICT_P(X) \
 427   (REGNO (X) >= FIRST_PSEUDO_REGISTER || REG_OK_FOR_BASE_STRICT_P(X))
 428
 429 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
 430
 431 #ifdef REG_OK_STRICT
 432 #  define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P (X)
 433 #else
 434 #  define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NOSTRICT_P (X)
 435 #endif
 436
 437 #define REG_OK_FOR_INDEX_P(X) 0
 438
 439 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)                          \
 440 {                                                                       \
 441   (X) = legitimize_address (X, OLDX, MODE);                             \
 442   if (memory_address_p (MODE, X))                                       \
 443     goto WIN;                                                           \
 444 }
 445
 446 #define XEXP_(X,Y) (X)
 447 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN)    \
 448 do {                                                                        \
 449   if (1&&(GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC))     \
 450     {                                                                       \
 451       push_reload (XEXP (X,0), XEXP (X,0), &XEXP (X,0), &XEXP (X,0),        \
 452                    POINTER_REGS, GET_MODE (X),GET_MODE (X) , 0, 0,          \
 453                    OPNUM, RELOAD_OTHER);                                    \
 454       goto WIN;                                                             \
 455     }                                                                       \
 456   if (GET_CODE (X) == PLUS                                                  \
 457       && REG_P (XEXP (X, 0))                                                \
 458       && GET_CODE (XEXP (X, 1)) == CONST_INT                                \
 459       && INTVAL (XEXP (X, 1)) >= 1)                                         \
 460     {                                                                       \
 461       int fit = INTVAL (XEXP (X, 1)) <= (64 - GET_MODE_SIZE (MODE));        \
 462       if (fit)                                                              \
 463         {                                                                   \
 464           if (reg_equiv_address[REGNO (XEXP (X, 0))] != 0)                  \
 465             {                                                               \
 466               int regno = REGNO (XEXP (X, 0));                              \
 467               rtx mem = make_memloc (X, regno);                             \
 468               push_reload (XEXP (mem,0), NULL, &XEXP (mem,0), NULL,         \
 469                            POINTER_REGS, Pmode, VOIDmode, 0, 0,             \
 470                            1, ADDR_TYPE (TYPE));                            \
 471               push_reload (mem, NULL_RTX, &XEXP (X, 0), NULL,               \
 472                            BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
 473                            OPNUM, TYPE);                                    \
 474               goto WIN;                                                     \
 475             }                                                               \
 476           push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL,           \
 477                        BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0,     \
 478                        OPNUM, TYPE);                                        \
 479           goto WIN;                                                         \
 480         }                                                                   \
 481       else if (! (frame_pointer_needed && XEXP (X,0) == frame_pointer_rtx)) \
 482         {                                                                   \
 483           push_reload (X, NULL_RTX, &X, NULL,                               \
 484                        POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0,          \
 485                        OPNUM, TYPE);                                        \
 486           goto WIN;                                                         \
 487         }                                                                   \
 488     }                                                                       \
 489 } while(0)
 490
 491 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)                        \
 492       if (GET_CODE (ADDR) == POST_INC || GET_CODE (ADDR) == PRE_DEC)    \
 493         goto LABEL
 494
 495 #define LEGITIMATE_CONSTANT_P(X) 1
 496
 497 #define REGISTER_MOVE_COST(MODE, FROM, TO) ((FROM) == STACK_REG ? 6 \
 498                                             : (TO) == STACK_REG ? 12 \
 499                                             : 2)
 500
 501 #define MEMORY_MOVE_COST(MODE,CLASS,IN) ((MODE)==QImode ? 2 :   \
 502                                          (MODE)==HImode ? 4 :   \
 503                                          (MODE)==SImode ? 8 :   \
 504                                          (MODE)==SFmode ? 8 : 16)
 505
 506 #define BRANCH_COST 0
 507
 508 #define SLOW_BYTE_ACCESS 0
 509
 510 #define NO_FUNCTION_CSE
 511
 512 #define TEXT_SECTION_ASM_OP "\t.text"
 513
 514 #define DATA_SECTION_ASM_OP "\t.data"
 515
 516 #define BSS_SECTION_ASM_OP "\t.section .bss"
 517
 518 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
 519    There are no shared libraries on this target, and these sections are
 520    placed in the read-only program memory, so they are not writable.  */
 521
 522 #undef CTORS_SECTION_ASM_OP
 523 #define CTORS_SECTION_ASM_OP "\t.section .ctors,\"a\",@progbits"
 524
 525 #undef DTORS_SECTION_ASM_OP
 526 #define DTORS_SECTION_ASM_OP "\t.section .dtors,\"a\",@progbits"
 527
 528 #define TARGET_ASM_CONSTRUCTOR avr_asm_out_ctor
 529
 530 #define TARGET_ASM_DESTRUCTOR avr_asm_out_dtor
 531
 532 #define EXTRA_SECTIONS in_progmem
 533
 534 #define EXTRA_SECTION_FUNCTIONS                                               \
 535                                                                               \
 536 void                                                                          \
 537 progmem_section (void)                                                        \
 538 {                                                                             \
 539   if (in_section != in_progmem)                                               \
 540     {                                                                         \
 541       fprintf (asm_out_file,                                                  \
 542                "\t.section .progmem.gcc_sw_table, \"%s\", @progbits\n",       \
 543                AVR_MEGA ? "a" : "ax");                                        \
 544       /* Should already be aligned, this is just to be safe if it isn't.  */  \
 545       fprintf (asm_out_file, "\t.p2align 1\n");                               \
 546       in_section = in_progmem;                                                \
 547     }                                                                         \
 548 }
 549
 550 #define READONLY_DATA_SECTION data_section
 551
 552 #define JUMP_TABLES_IN_TEXT_SECTION 0
 553
 554 #define ASM_COMMENT_START " ; "
 555
 556 #define ASM_APP_ON "/* #APP */\n"
 557
 558 #define ASM_APP_OFF "/* #NOAPP */\n"
 559
 560 #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE, COUNTER) \
 561   fprintf (STREAM,"/* line: %d */\n",LINE)
 562
 563 /* Switch into a generic section.  */
 564 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
 565
 566 #define ASM_OUTPUT_ASCII(FILE, P, SIZE)  gas_output_ascii (FILE,P,SIZE)
 567
 568 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == '\n'                    \
 569                                           || ((C) == '$'))
 570
 571 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)                     \
 572 do {                                                                       \
 573      fputs ("\t.comm ", (STREAM));                                         \
 574      assemble_name ((STREAM), (NAME));                                     \
 575      fprintf ((STREAM), ",%lu,1\n", (unsigned long)(SIZE));                \
 576 } while (0)
 577
 578 #define ASM_OUTPUT_BSS(FILE, DECL, NAME, SIZE, ROUNDED)                 \
 579   asm_output_bss ((FILE), (DECL), (NAME), (SIZE), (ROUNDED))
 580
 581 #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED)                   \
 582 do {                                                                    \
 583      fputs ("\t.lcomm ", (STREAM));                                     \
 584      assemble_name ((STREAM), (NAME));                                  \
 585      fprintf ((STREAM), ",%d\n", (int)(SIZE));                          \
 586 } while (0)
 587
 588 #undef TYPE_ASM_OP
 589 #undef SIZE_ASM_OP
 590 #undef WEAK_ASM_OP
 591 #define TYPE_ASM_OP     "\t.type\t"
 592 #define SIZE_ASM_OP     "\t.size\t"
 593 #define WEAK_ASM_OP     "\t.weak\t"
 594 /* Define the strings used for the special svr4 .type and .size directives.
 595    These strings generally do not vary from one system running svr4 to
 596    another, but if a given system (e.g. m88k running svr) needs to use
 597    different pseudo-op names for these, they may be overridden in the
 598    file which includes this one.  */
 599
 600
 601 #undef TYPE_OPERAND_FMT
 602 #define TYPE_OPERAND_FMT        "@%s"
 603 /* The following macro defines the format used to output the second
 604    operand of the .type assembler directive.  Different svr4 assemblers
 605    expect various different forms for this operand.  The one given here
 606    is just a default.  You may need to override it in your machine-
 607    specific tm.h file (depending upon the particulars of your assembler).  */
 608
 609 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 610 do {                                                            \
 611      ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");        \
 612      ASM_OUTPUT_LABEL (FILE, NAME);                             \
 613 } while (0)
 614
 615 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)                    \
 616   do {                                                                  \
 617     if (!flag_inhibit_size_directive)                                   \
 618       ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                           \
 619   } while (0)
 620
 621 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 622 do {                                                                    \
 623   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");                     \
 624   size_directive_output = 0;                                            \
 625   if (!flag_inhibit_size_directive && DECL_SIZE (DECL))                 \
 626     {                                                                   \
 627       size_directive_output = 1;                                        \
 628       ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME,                            \
 629                                  int_size_in_bytes (TREE_TYPE (DECL))); \
 630     }                                                                   \
 631   ASM_OUTPUT_LABEL(FILE, NAME);                                         \
 632 } while (0)
 633
 634 #undef ASM_FINISH_DECLARE_OBJECT
 635 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)         \
 636 do {                                                                     \
 637      const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);             \
 638      HOST_WIDE_INT size;                                                 \
 639      if (!flag_inhibit_size_directive && DECL_SIZE (DECL)                \
 640          && ! AT_END && TOP_LEVEL                                        \
 641          && DECL_INITIAL (DECL) == error_mark_node                       \
 642          && !size_directive_output)                                      \
 643        {                                                                 \
 644          size_directive_output = 1;                                      \
 645          size = int_size_in_bytes (TREE_TYPE (DECL));                    \
 646          ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size);                   \
 647        }                                                                 \
 648    } while (0)
 649
 650
 651 #define ESCAPES \
 652 "\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\
 653 \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\
 654 \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\
 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\1\
 656 \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\
 657 \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\
 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 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
 661    ASM_OUTPUT_LIMITED_STRING macros.  Each byte in the table
 662    corresponds to a particular byte value [0..255].  For any
 663    given byte value, if the value in the corresponding table
 664    position is zero, the given character can be output directly.
 665    If the table value is 1, the byte must be output as a \ooo
 666    octal escape.  If the tables value is anything else, then the
 667    byte value should be output as a \ followed by the value
 668    in the table.  Note that we can use standard UN*X escape
 669    sequences for many control characters, but we don't use
 670    \a to represent BEL because some svr4 assemblers (e.g. on
 671    the i386) don't know about that.  Also, we don't use \v
 672    since some versions of gas, such as 2.2 did not accept it.  */
 673
 674 #define STRING_LIMIT    ((unsigned) 64)
 675 #define STRING_ASM_OP   "\t.string\t"
 676 /* Some svr4 assemblers have a limit on the number of characters which
 677    can appear in the operand of a .string directive.  If your assembler
 678    has such a limitation, you should define STRING_LIMIT to reflect that
 679    limit.  Note that at least some svr4 assemblers have a limit on the
 680    actual number of bytes in the double-quoted string, and that they
 681    count each character in an escape sequence as one byte.  Thus, an
 682    escape sequence like \377 would count as four bytes.
 683
 684    If your target assembler doesn't support the .string directive, you
 685    should define this to zero.  */
 686
 687 /* Globalizing directive for a label.  */
 688 #define GLOBAL_ASM_OP ".global\t"
 689
 690 #define ASM_WEAKEN_LABEL(FILE, NAME)    \
 691   do                                    \
 692     {                                   \
 693       fputs ("\t.weak\t", (FILE));      \
 694       assemble_name ((FILE), (NAME));   \
 695       fputc ('\n', (FILE));             \
 696     }                                   \
 697   while (0)
 698
 699 #define SUPPORTS_WEAK 1
 700
 701 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)        \
 702 sprintf (STRING, "*.%s%lu", PREFIX, (unsigned long)(NUM))
 703
 704 #define HAS_INIT_SECTION 1
 705
 706 #define REGISTER_NAMES {                                \
 707   "r0","r1","r2","r3","r4","r5","r6","r7",              \
 708     "r8","r9","r10","r11","r12","r13","r14","r15",      \
 709     "r16","r17","r18","r19","r20","r21","r22","r23",    \
 710     "r24","r25","r26","r27","r28","r29","r30","r31",    \
 711     "__SPL__","__SPH__","argL","argH"}
 712
 713 #define FINAL_PRESCAN_INSN(insn, operand, nop) final_prescan_insn (insn, operand,nop)
 714
 715 #define PRINT_OPERAND(STREAM, X, CODE) print_operand (STREAM, X, CODE)
 716
 717 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '~')
 718
 719 #define PRINT_OPERAND_ADDRESS(STREAM, X) print_operand_address(STREAM, X)
 720
 721 #define USER_LABEL_PREFIX ""
 722
 723 #define ASSEMBLER_DIALECT AVR_ENHANCED
 724
 725 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO)      \
 726 {                                               \
 727   if (REGNO > 31)                               \
 728     abort ();                                   \
 729   fprintf (STREAM, "\tpush\tr%d", REGNO);       \
 730 }
 731
 732 #define ASM_OUTPUT_REG_POP(STREAM, REGNO)       \
 733 {                                               \
 734   if (REGNO > 31)                               \
 735     abort ();                                   \
 736   fprintf (STREAM, "\tpop\tr%d", REGNO);        \
 737 }
 738
 739 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)          \
 740   avr_output_addr_vec_elt(STREAM, VALUE)
 741
 742 #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) \
 743   progmem_section (), (*targetm.asm_out.internal_label) (STREAM, PREFIX, NUM)
 744
 745 #define ASM_OUTPUT_SKIP(STREAM, N)              \
 746 fprintf (STREAM, "\t.skip %lu,0\n", (unsigned long)(N))
 747
 748 #define ASM_OUTPUT_ALIGN(STREAM, POWER)
 749
 750 #define CASE_VECTOR_MODE HImode
 751
 752 extern int avr_case_values_threshold;
 753
 754 #define CASE_VALUES_THRESHOLD avr_case_values_threshold
 755
 756 #undef WORD_REGISTER_OPERATIONS
 757
 758 #define MOVE_MAX 4
 759
 760 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
 761
 762 #define Pmode HImode
 763
 764 #define FUNCTION_MODE HImode
 765
 766 #define DOLLARS_IN_IDENTIFIERS 0
 767
 768 #define NO_DOLLAR_IN_LABEL 1
 769
 770 #define TRAMPOLINE_TEMPLATE(FILE) \
 771   internal_error ("trampolines not supported")
 772
 773 #define TRAMPOLINE_SIZE 4
 774
 775 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)                             \
 776 {                                                                             \
 777   emit_move_insn (gen_rtx_MEM (HImode, plus_constant ((TRAMP), 2)), CXT);    \
 778   emit_move_insn (gen_rtx_MEM (HImode, plus_constant ((TRAMP), 6)), FNADDR); \
 779 }
 780 /* Store in cc_status the expressions
 781    that the condition codes will describe
 782    after execution of an instruction whose pattern is EXP.
 783    Do not alter them if the instruction would not alter the cc's.  */
 784
 785 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
 786
 787 /* The add insns don't set overflow in a usable way.  */
 788 #define CC_OVERFLOW_UNUSABLE 01000
 789 /* The mov,and,or,xor insns don't set carry.  That's ok though as the
 790    Z bit is all we need when doing unsigned comparisons on the result of
 791    these insns (since they're always with 0).  However, conditions.h has
 792    CC_NO_OVERFLOW defined for this purpose.  Rename it to something more
 793    understandable.  */
 794 #define CC_NO_CARRY CC_NO_OVERFLOW
 795
 796
 797 /* Output assembler code to FILE to increment profiler label # LABELNO
 798    for profiling a function entry.  */
 799
 800 #define FUNCTION_PROFILER(FILE, LABELNO)  \
 801   fprintf (FILE, "/* profiler %d */", (LABELNO))
 802
 803 #define ADJUST_INSN_LENGTH(INSN, LENGTH) (LENGTH =\
 804                                           adjust_insn_length (INSN, LENGTH))
 805
 806 #define TARGET_MEM_FUNCTIONS
 807
 808 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE}"
 809
 810 #define CC1_SPEC "%{profile:-p}"
 811
 812 #define CC1PLUS_SPEC "%{!frtti:-fno-rtti} \
 813     %{!fenforce-eh-specs:-fno-enforce-eh-specs} \
 814     %{!fexceptions:-fno-exceptions}"
 815 /* A C string constant that tells the GCC drvier program options to
 816    pass to `cc1plus'.  */
 817
 818 #define ASM_SPEC "%{mmcu=*:-mmcu=%*}"
 819
 820 #define LINK_SPEC " %{!mmcu*:-m avr2}\
 821 %{mmcu=at90s1200|mmcu=attiny1*|mmcu=attiny28:-m avr1} \
 822 %{mmcu=attiny22|mmcu=attiny26|mmcu=at90s2*|mmcu=at90s4*|mmcu=at90s8*|mmcu=at90c8*|mmcu=at86rf401:-m avr2}\
 823 %{mmcu=atmega103|mmcu=atmega603|mmcu=at43*|mmcu=at76*:-m avr3}\
 824 %{mmcu=atmega8*:-m avr4}\
 825 %{mmcu=atmega16*|mmcu=atmega32*|mmcu=atmega64|mmcu=atmega128|mmcu=at94k:-m avr5}\
 826 %{mmcu=atmega64|mmcu=atmega128|mmcu=atmega162|mmcu=atmega169: -Tdata 0x800100} "
 827
 828 #define LIB_SPEC \
 829   "%{!mmcu=at90s1*:%{!mmcu=attiny1*:%{!mmcu=attiny28: -lc }}}"
 830
 831 #define LIBSTDCXX "-lgcc"
 832 /* No libstdc++ for now.  Empty string doesn't work.  */
 833
 834 #define LIBGCC_SPEC \
 835   "%{!mmcu=at90s1*:%{!mmcu=attiny1*:%{!mmcu=attiny28: -lgcc }}}"
 836
 837 #define STARTFILE_SPEC "%(crt_binutils)"
 838
 839 #define ENDFILE_SPEC ""
 840
 841 #define CRT_BINUTILS_SPECS "\
 842 %{mmcu=at90s1200|mmcu=avr1:crts1200.o%s} \
 843 %{mmcu=attiny11:crttn11.o%s} \
 844 %{mmcu=attiny12:crttn12.o%s} \
 845 %{mmcu=attiny15:crttn15.o%s} \
 846 %{mmcu=attiny28:crttn28.o%s} \
 847 %{!mmcu*|mmcu=at90s8515|mmcu=avr2:crts8515.o%s} \
 848 %{mmcu=at90s2313:crts2313.o%s} \
 849 %{mmcu=at90s2323:crts2323.o%s} \
 850 %{mmcu=at90s2333:crts2333.o%s} \
 851 %{mmcu=at90s2343:crts2343.o%s} \
 852 %{mmcu=attiny22:crttn22.o%s} \
 853 %{mmcu=attiny26:crttn26.o%s} \
 854 %{mmcu=at90s4433:crts4433.o%s} \
 855 %{mmcu=at90s4414:crts4414.o%s} \
 856 %{mmcu=at90s4434:crts4434.o%s} \
 857 %{mmcu=at90c8534:crtc8534.o%s} \
 858 %{mmcu=at90s8535:crts8535.o%s} \
 859 %{mmcu=at86rf401:crt86401.o%s} \
 860 %{mmcu=atmega103|mmcu=avr3:crtm103.o%s} \
 861 %{mmcu=atmega603:crtm603.o%s} \
 862 %{mmcu=at43usb320:crt43320.o%s} \
 863 %{mmcu=at43usb355:crt43355.o%s} \
 864 %{mmcu=at76c711:crt76711.o%s} \
 865 %{mmcu=atmega8|mmcu=avr4:crtm8.o%s} \
 866 %{mmcu=atmega8515:crtm8515.o%s} \
 867 %{mmcu=atmega8535:crtm8535.o%s} \
 868 %{mmcu=atmega16:crtm16.o%s} \
 869 %{mmcu=atmega161|mmcu=avr5:crtm161.o%s} \
 870 %{mmcu=atmega162:crtm162.o%s} \
 871 %{mmcu=atmega163:crtm163.o%s} \
 872 %{mmcu=atmega169:crtm169.o%s} \
 873 %{mmcu=atmega32:crtm32.o%s} \
 874 %{mmcu=atmega323:crtm323.o%s} \
 875 %{mmcu=atmega64:crtm64.o%s} \
 876 %{mmcu=atmega128:crtm128.o%s} \
 877 %{mmcu=at94k:crtat94k.o%s}"
 878
 879 #define EXTRA_SPECS {"crt_binutils", CRT_BINUTILS_SPECS},
 880
 881 /* This is the default without any -mmcu=* option (AT90S*).  */
 882 #define MULTILIB_DEFAULTS { "mmcu=avr2" }
 883
 884 /* This is undefined macro for collect2 disabling */
 885 #define LINKER_NAME "ld"
 886
 887 #define TEST_HARD_REG_CLASS(CLASS, REGNO) \
 888   TEST_HARD_REG_BIT (reg_class_contents[ (int) (CLASS)], REGNO)
 889
 890 /* Note that the other files fail to use these
 891    in some of the places where they should.  */
 892
 893 #if defined(__STDC__) || defined(ALMOST_STDC)
 894 #define AS2(a,b,c) #a " " #b "," #c
 895 #define AS2C(b,c) " " #b "," #c
 896 #define AS3(a,b,c,d) #a " " #b "," #c "," #d
 897 #define AS1(a,b) #a " " #b
 898 #else
 899 #define AS1(a,b) "a     b"
 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 #endif
 904 #define OUT_AS1(a,b) output_asm_insn (AS1(a,b), operands)
 905 #define OUT_AS2(a,b,c) output_asm_insn (AS2(a,b,c), operands)
 906 #define CR_TAB "\n\t"
 907
 908 /* Temporary register r0 */
 909 #define TMP_REGNO 0
 910
 911 /* zero register r1 */
 912 #define ZERO_REGNO 1
 913
 914 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG