gnu/dist/gcc4/gcc/config/avr/avr.h

   1 /* Definitions of target machine for GNU compiler,
   2    for ATMEL AVR at90s8515, ATmega103/103L, ATmega603/603L microcontrollers.
   3    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
   4    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, 51 Franklin Street, Fifth Floor,
  22 Boston, MA 02110-1301, 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 extern const char *avr_base_arch_macro;
  46 extern const char *avr_extra_arch_macro;
  47 extern int avr_mega_p;
  48 extern int avr_enhanced_p;
  49 extern int avr_asm_only_p;
  50
  51 #define AVR_MEGA (avr_mega_p && !TARGET_SHORT_CALLS)
  52 #define AVR_ENHANCED (avr_enhanced_p)
  53
  54 #define TARGET_VERSION fprintf (stderr, " (GNU assembler syntax)");
  55
  56 #define OVERRIDE_OPTIONS avr_override_options ()
  57
  58 #define CAN_DEBUG_WITHOUT_FP
  59
  60 #define BITS_BIG_ENDIAN 0
  61 #define BYTES_BIG_ENDIAN 0
  62 #define WORDS_BIG_ENDIAN 0
  63
  64 #ifdef IN_LIBGCC2
  65 /* This is to get correct SI and DI modes in libgcc2.c (32 and 64 bits).  */
  66 #define UNITS_PER_WORD 4
  67 #else
  68 /* Width of a word, in units (bytes).  */
  69 #define UNITS_PER_WORD 1
  70 #endif
  71
  72 #define POINTER_SIZE 16
  73
  74
  75 /* Maximum sized of reasonable data type
  76    DImode or Dfmode ...  */
  77 #define MAX_FIXED_MODE_SIZE 32
  78
  79 #define PARM_BOUNDARY 8
  80
  81 #define FUNCTION_BOUNDARY 8
  82
  83 #define EMPTY_FIELD_BOUNDARY 8
  84
  85 /* No data type wants to be aligned rounder than this.  */
  86 #define BIGGEST_ALIGNMENT 8
  87
  88
  89 #define STRICT_ALIGNMENT 0
  90
  91 #define INT_TYPE_SIZE (TARGET_INT8 ? 8 : 16)
  92 #define SHORT_TYPE_SIZE (INT_TYPE_SIZE == 8 ? INT_TYPE_SIZE : 16)
  93 #define LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 16 : 32)
  94 #define LONG_LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 32 : 64)
  95 #define FLOAT_TYPE_SIZE 32
  96 #define DOUBLE_TYPE_SIZE 32
  97 #define LONG_DOUBLE_TYPE_SIZE 32
  98
  99 #define DEFAULT_SIGNED_CHAR 1
 100
 101 #define SIZE_TYPE (INT_TYPE_SIZE == 8 ? "long unsigned int" : "unsigned int")
 102 #define PTRDIFF_TYPE (INT_TYPE_SIZE == 8 ? "long int" :"int")
 103
 104 #define WCHAR_TYPE_SIZE 16
 105
 106 #define FIRST_PSEUDO_REGISTER 36
 107
 108 #define FIXED_REGISTERS {\
 109   1,1,/* r0 r1 */\
 110   0,0,/* r2 r3 */\
 111   0,0,/* r4 r5 */\
 112   0,0,/* r6 r7 */\
 113   0,0,/* r8 r9 */\
 114   0,0,/* r10 r11 */\
 115   0,0,/* r12 r13 */\
 116   0,0,/* r14 r15 */\
 117   0,0,/* r16 r17 */\
 118   0,0,/* r18 r19 */\
 119   0,0,/* r20 r21 */\
 120   0,0,/* r22 r23 */\
 121   0,0,/* r24 r25 */\
 122   0,0,/* r26 r27 */\
 123   0,0,/* r28 r29 */\
 124   0,0,/* r30 r31 */\
 125   1,1,/*  STACK */\
 126   1,1 /* arg pointer */  }
 127
 128 #define CALL_USED_REGISTERS {                   \
 129   1,1,/* r0 r1 */                               \
 130     0,0,/* r2 r3 */                             \
 131     0,0,/* r4 r5 */                             \
 132     0,0,/* r6 r7 */                             \
 133     0,0,/* r8 r9 */                             \
 134     0,0,/* r10 r11 */                           \
 135     0,0,/* r12 r13 */                           \
 136     0,0,/* r14 r15 */                           \
 137     0,0,/* r16 r17 */                           \
 138     1,1,/* r18 r19 */                           \
 139     1,1,/* r20 r21 */                           \
 140     1,1,/* r22 r23 */                           \
 141     1,1,/* r24 r25 */                           \
 142     1,1,/* r26 r27 */                           \
 143     0,0,/* r28 r29 */                           \
 144     1,1,/* r30 r31 */                           \
 145     1,1,/*  STACK */                            \
 146     1,1 /* arg pointer */  }
 147
 148 #define REG_ALLOC_ORDER {                       \
 149     24,25,                                      \
 150     18,19,                                      \
 151     20,21,                                      \
 152     22,23,                                      \
 153     30,31,                                      \
 154     26,27,                                      \
 155     28,29,                                      \
 156     17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,    \
 157     0,1,                                        \
 158     32,33,34,35                                 \
 159     }
 160
 161 #define ORDER_REGS_FOR_LOCAL_ALLOC order_regs_for_local_alloc ()
 162
 163
 164 #define HARD_REGNO_NREGS(REGNO, MODE) ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
 165
 166 #define HARD_REGNO_MODE_OK(REGNO, MODE) avr_hard_regno_mode_ok(REGNO, MODE)
 167
 168 #define MODES_TIEABLE_P(MODE1, MODE2) 1
 169
 170 enum reg_class {
 171   NO_REGS,
 172   R0_REG,                       /* r0 */
 173   POINTER_X_REGS,               /* r26 - r27 */
 174   POINTER_Y_REGS,               /* r28 - r29 */
 175   POINTER_Z_REGS,               /* r30 - r31 */
 176   STACK_REG,                    /* STACK */
 177   BASE_POINTER_REGS,            /* r28 - r31 */
 178   POINTER_REGS,                 /* r26 - r31 */
 179   ADDW_REGS,                    /* r24 - r31 */
 180   SIMPLE_LD_REGS,               /* r16 - r23 */
 181   LD_REGS,                      /* r16 - r31 */
 182   NO_LD_REGS,                   /* r0 - r15 */
 183   GENERAL_REGS,                 /* r0 - r31 */
 184   ALL_REGS, LIM_REG_CLASSES
 185 };
 186
 187
 188 #define N_REG_CLASSES (int)LIM_REG_CLASSES
 189
 190 #define REG_CLASS_NAMES {                                       \
 191                  "NO_REGS",                                     \
 192                    "R0_REG",    /* r0 */                        \
 193                    "POINTER_X_REGS", /* r26 - r27 */            \
 194                    "POINTER_Y_REGS", /* r28 - r29 */            \
 195                    "POINTER_Z_REGS", /* r30 - r31 */            \
 196                    "STACK_REG", /* STACK */                     \
 197                    "BASE_POINTER_REGS", /* r28 - r31 */         \
 198                    "POINTER_REGS", /* r26 - r31 */              \
 199                    "ADDW_REGS", /* r24 - r31 */                 \
 200                    "SIMPLE_LD_REGS", /* r16 - r23 */            \
 201                    "LD_REGS",   /* r16 - r31 */                 \
 202                    "NO_LD_REGS", /* r0 - r15 */                 \
 203                    "GENERAL_REGS", /* r0 - r31 */               \
 204                    "ALL_REGS" }
 205
 206 #define REG_X 26
 207 #define REG_Y 28
 208 #define REG_Z 30
 209 #define REG_W 24
 210
 211 #define REG_CLASS_CONTENTS {                                            \
 212   {0x00000000,0x00000000},      /* NO_REGS */                           \
 213   {0x00000001,0x00000000},      /* R0_REG */                            \
 214   {3 << REG_X,0x00000000},      /* POINTER_X_REGS, r26 - r27 */         \
 215   {3 << REG_Y,0x00000000},      /* POINTER_Y_REGS, r28 - r29 */         \
 216   {3 << REG_Z,0x00000000},      /* POINTER_Z_REGS, r30 - r31 */         \
 217   {0x00000000,0x00000003},      /* STACK_REG, STACK */                  \
 218   {(3 << REG_Y) | (3 << REG_Z),                                         \
 219      0x00000000},               /* BASE_POINTER_REGS, r28 - r31 */      \
 220   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z),                          \
 221      0x00000000},               /* POINTER_REGS, r26 - r31 */           \
 222   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z) | (3 << REG_W),           \
 223      0x00000000},               /* ADDW_REGS, r24 - r31 */              \
 224   {0x00ff0000,0x00000000},      /* SIMPLE_LD_REGS r16 - r23 */          \
 225   {(3 << REG_X)|(3 << REG_Y)|(3 << REG_Z)|(3 << REG_W)|(0xff << 16),    \
 226      0x00000000},       /* LD_REGS, r16 - r31 */                        \
 227   {0x0000ffff,0x00000000},      /* NO_LD_REGS  r0 - r15 */              \
 228   {0xffffffff,0x00000000},      /* GENERAL_REGS, r0 - r31 */            \
 229   {0xffffffff,0x00000003}       /* ALL_REGS */                          \
 230 }
 231
 232 #define REGNO_REG_CLASS(R) avr_regno_reg_class(R)
 233
 234 #define BASE_REG_CLASS (reload_completed ? BASE_POINTER_REGS : POINTER_REGS)
 235
 236 #define INDEX_REG_CLASS NO_REGS
 237
 238 #define REG_CLASS_FROM_LETTER(C) avr_reg_class_from_letter(C)
 239
 240 #define REGNO_OK_FOR_BASE_P(r) (((r) < FIRST_PSEUDO_REGISTER            \
 241                                  && ((r) == REG_X                       \
 242                                      || (r) == REG_Y                    \
 243                                      || (r) == REG_Z                    \
 244                                      || (r) == ARG_POINTER_REGNUM))     \
 245                                 || (reg_renumber                        \
 246                                     && (reg_renumber[r] == REG_X        \
 247                                         || reg_renumber[r] == REG_Y     \
 248                                         || reg_renumber[r] == REG_Z     \
 249                                         || (reg_renumber[r]             \
 250                                             == ARG_POINTER_REGNUM))))
 251
 252 #define REGNO_OK_FOR_INDEX_P(NUM) 0
 253
 254 #define PREFERRED_RELOAD_CLASS(X, CLASS) preferred_reload_class(X,CLASS)
 255
 256 #define SMALL_REGISTER_CLASSES 1
 257
 258 #define CLASS_LIKELY_SPILLED_P(c) class_likely_spilled_p(c)
 259
 260 #define CLASS_MAX_NREGS(CLASS, MODE)   class_max_nregs (CLASS, MODE)
 261
 262 #define CONST_OK_FOR_LETTER_P(VALUE, C)                         \
 263   ((C) == 'I' ? (VALUE) >= 0 && (VALUE) <= 63 :                 \
 264    (C) == 'J' ? (VALUE) <= 0 && (VALUE) >= -63:                 \
 265    (C) == 'K' ? (VALUE) == 2 :                                  \
 266    (C) == 'L' ? (VALUE) == 0 :                                  \
 267    (C) == 'M' ? (VALUE) >= 0 && (VALUE) <= 0xff :               \
 268    (C) == 'N' ? (VALUE) == -1:                                  \
 269    (C) == 'O' ? (VALUE) == 8 || (VALUE) == 16 || (VALUE) == 24: \
 270    (C) == 'P' ? (VALUE) == 1 :                                  \
 271    0)
 272
 273 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
 274   ((C) == 'G' ? (VALUE) == CONST0_RTX (SFmode)  \
 275    : 0)
 276
 277 #define EXTRA_CONSTRAINT(x, c) extra_constraint(x, c)
 278
 279 #define STACK_PUSH_CODE POST_DEC
 280
 281 #define STACK_GROWS_DOWNWARD
 282
 283 #define STARTING_FRAME_OFFSET 1
 284
 285 #define STACK_POINTER_OFFSET 1
 286
 287 #define FIRST_PARM_OFFSET(FUNDECL) 0
 288
 289 #define STACK_BOUNDARY 8
 290
 291 #define STACK_POINTER_REGNUM 32
 292
 293 #define FRAME_POINTER_REGNUM REG_Y
 294
 295 #define ARG_POINTER_REGNUM 34
 296
 297 #define STATIC_CHAIN_REGNUM 2
 298
 299 #define FRAME_POINTER_REQUIRED frame_pointer_required_p()
 300
 301 /* Offset from the frame pointer register value to the top of the stack.  */
 302 #define FRAME_POINTER_CFA_OFFSET(FNDECL) 0
 303
 304 #define ELIMINABLE_REGS {                                       \
 305       {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},               \
 306         {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}            \
 307        ,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}}
 308
 309 #define CAN_ELIMINATE(FROM, TO) (((FROM) == ARG_POINTER_REGNUM             \
 310                                   && (TO) == FRAME_POINTER_REGNUM)         \
 311                                  || (((FROM) == FRAME_POINTER_REGNUM       \
 312                                       || (FROM) == FRAME_POINTER_REGNUM+1) \
 313                                      && ! FRAME_POINTER_REQUIRED           \
 314                                      ))
 315
 316 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                    \
 317      OFFSET = initial_elimination_offset (FROM, TO)
 318
 319 #define RETURN_ADDR_RTX(count, x) \
 320   gen_rtx_MEM (Pmode, memory_address (Pmode, plus_constant (tem, 1)))
 321
 322 #define PUSH_ROUNDING(NPUSHED) (NPUSHED)
 323
 324 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
 325
 326 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) (function_arg (&(CUM), MODE, TYPE, NAMED))
 327
 328 typedef struct avr_args {
 329   int nregs;                    /* # registers available for passing */
 330   int regno;                    /* next available register number */
 331 } CUMULATIVE_ARGS;
 332
 333 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
 334   init_cumulative_args (&(CUM), FNTYPE, LIBNAME, FNDECL)
 335
 336 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)    \
 337   (function_arg_advance (&CUM, MODE, TYPE, NAMED))
 338
 339 #define FUNCTION_ARG_REGNO_P(r) function_arg_regno_p(r)
 340
 341 extern int avr_reg_order[];
 342
 343 #define RET_REGISTER avr_ret_register ()
 344
 345 #define FUNCTION_VALUE(VALTYPE, FUNC) avr_function_value (VALTYPE, FUNC)
 346
 347 #define LIBCALL_VALUE(MODE)  avr_libcall_value (MODE)
 348
 349 #define FUNCTION_VALUE_REGNO_P(N) ((int) (N) == RET_REGISTER)
 350
 351 #define DEFAULT_PCC_STRUCT_RETURN 0
 352
 353 #define EPILOGUE_USES(REGNO) 0
 354
 355 #define HAVE_POST_INCREMENT 1
 356 #define HAVE_PRE_DECREMENT 1
 357
 358 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
 359
 360 #define MAX_REGS_PER_ADDRESS 1
 361
 362 #ifdef REG_OK_STRICT
 363 #  define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
 364 {                                                       \
 365   if (legitimate_address_p (mode, operand, 1))          \
 366     goto ADDR;                                          \
 367 }
 368 #  else
 369 #  define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
 370 {                                                       \
 371   if (legitimate_address_p (mode, operand, 0))          \
 372     goto ADDR;                                          \
 373 }
 374 #endif
 375
 376 #define REG_OK_FOR_BASE_NOSTRICT_P(X) \
 377   (REGNO (X) >= FIRST_PSEUDO_REGISTER || REG_OK_FOR_BASE_STRICT_P(X))
 378
 379 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
 380
 381 #ifdef REG_OK_STRICT
 382 #  define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P (X)
 383 #else
 384 #  define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NOSTRICT_P (X)
 385 #endif
 386
 387 #define REG_OK_FOR_INDEX_P(X) 0
 388
 389 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)                          \
 390 {                                                                       \
 391   (X) = legitimize_address (X, OLDX, MODE);                             \
 392   if (memory_address_p (MODE, X))                                       \
 393     goto WIN;                                                           \
 394 }
 395
 396 #define XEXP_(X,Y) (X)
 397 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN)    \
 398 do {                                                                        \
 399   if (1&&(GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC))     \
 400     {                                                                       \
 401       push_reload (XEXP (X,0), XEXP (X,0), &XEXP (X,0), &XEXP (X,0),        \
 402                    POINTER_REGS, GET_MODE (X),GET_MODE (X) , 0, 0,          \
 403                    OPNUM, RELOAD_OTHER);                                    \
 404       goto WIN;                                                             \
 405     }                                                                       \
 406   if (GET_CODE (X) == PLUS                                                  \
 407       && REG_P (XEXP (X, 0))                                                \
 408       && GET_CODE (XEXP (X, 1)) == CONST_INT                                \
 409       && INTVAL (XEXP (X, 1)) >= 1)                                         \
 410     {                                                                       \
 411       int fit = INTVAL (XEXP (X, 1)) <= (64 - GET_MODE_SIZE (MODE));        \
 412       if (fit)                                                              \
 413         {                                                                   \
 414           if (reg_equiv_address[REGNO (XEXP (X, 0))] != 0)                  \
 415             {                                                               \
 416               int regno = REGNO (XEXP (X, 0));                              \
 417               rtx mem = make_memloc (X, regno);                             \
 418               push_reload (XEXP (mem,0), NULL, &XEXP (mem,0), NULL,         \
 419                            POINTER_REGS, Pmode, VOIDmode, 0, 0,             \
 420                            1, ADDR_TYPE (TYPE));                            \
 421               push_reload (mem, NULL_RTX, &XEXP (X, 0), NULL,               \
 422                            BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
 423                            OPNUM, TYPE);                                    \
 424               goto WIN;                                                     \
 425             }                                                               \
 426           push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL,           \
 427                        BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0,     \
 428                        OPNUM, TYPE);                                        \
 429           goto WIN;                                                         \
 430         }                                                                   \
 431       else if (! (frame_pointer_needed && XEXP (X,0) == frame_pointer_rtx)) \
 432         {                                                                   \
 433           push_reload (X, NULL_RTX, &X, NULL,                               \
 434                        POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0,          \
 435                        OPNUM, TYPE);                                        \
 436           goto WIN;                                                         \
 437         }                                                                   \
 438     }                                                                       \
 439 } while(0)
 440
 441 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)                        \
 442       if (GET_CODE (ADDR) == POST_INC || GET_CODE (ADDR) == PRE_DEC)    \
 443         goto LABEL
 444
 445 #define LEGITIMATE_CONSTANT_P(X) 1
 446
 447 #define REGISTER_MOVE_COST(MODE, FROM, TO) ((FROM) == STACK_REG ? 6 \
 448                                             : (TO) == STACK_REG ? 12 \
 449                                             : 2)
 450
 451 #define MEMORY_MOVE_COST(MODE,CLASS,IN) ((MODE)==QImode ? 2 :   \
 452                                          (MODE)==HImode ? 4 :   \
 453                                          (MODE)==SImode ? 8 :   \
 454                                          (MODE)==SFmode ? 8 : 16)
 455
 456 #define BRANCH_COST 0
 457
 458 #define SLOW_BYTE_ACCESS 0
 459
 460 #define NO_FUNCTION_CSE
 461
 462 #define TEXT_SECTION_ASM_OP "\t.text"
 463
 464 #define DATA_SECTION_ASM_OP "\t.data"
 465
 466 #define BSS_SECTION_ASM_OP "\t.section .bss"
 467
 468 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
 469    There are no shared libraries on this target, and these sections are
 470    placed in the read-only program memory, so they are not writable.  */
 471
 472 #undef CTORS_SECTION_ASM_OP
 473 #define CTORS_SECTION_ASM_OP "\t.section .ctors,\"a\",@progbits"
 474
 475 #undef DTORS_SECTION_ASM_OP
 476 #define DTORS_SECTION_ASM_OP "\t.section .dtors,\"a\",@progbits"
 477
 478 #define TARGET_ASM_CONSTRUCTOR avr_asm_out_ctor
 479
 480 #define TARGET_ASM_DESTRUCTOR avr_asm_out_dtor
 481
 482 #define EXTRA_SECTIONS in_progmem
 483
 484 #define EXTRA_SECTION_FUNCTIONS                                               \
 485                                                                               \
 486 void                                                                          \
 487 progmem_section (void)                                                        \
 488 {                                                                             \
 489   if (in_section != in_progmem)                                               \
 490     {                                                                         \
 491       fprintf (asm_out_file,                                                  \
 492                "\t.section .progmem.gcc_sw_table, \"%s\", @progbits\n",       \
 493                AVR_MEGA ? "a" : "ax");                                        \
 494       /* Should already be aligned, this is just to be safe if it isn't.  */  \
 495       fprintf (asm_out_file, "\t.p2align 1\n");                               \
 496       in_section = in_progmem;                                                \
 497     }                                                                         \
 498 }
 499
 500 #define READONLY_DATA_SECTION data_section
 501
 502 #define JUMP_TABLES_IN_TEXT_SECTION 0
 503
 504 #define ASM_COMMENT_START " ; "
 505
 506 #define ASM_APP_ON "/* #APP */\n"
 507
 508 #define ASM_APP_OFF "/* #NOAPP */\n"
 509
 510 /* Switch into a generic section.  */
 511 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
 512
 513 #define ASM_OUTPUT_ASCII(FILE, P, SIZE)  gas_output_ascii (FILE,P,SIZE)
 514
 515 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == '\n'                    \
 516                                           || ((C) == '$'))
 517
 518 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)                     \
 519 do {                                                                       \
 520      fputs ("\t.comm ", (STREAM));                                         \
 521      assemble_name ((STREAM), (NAME));                                     \
 522      fprintf ((STREAM), ",%lu,1\n", (unsigned long)(SIZE));                \
 523 } while (0)
 524
 525 #define ASM_OUTPUT_BSS(FILE, DECL, NAME, SIZE, ROUNDED)                 \
 526   asm_output_bss ((FILE), (DECL), (NAME), (SIZE), (ROUNDED))
 527
 528 #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED)                   \
 529 do {                                                                    \
 530      fputs ("\t.lcomm ", (STREAM));                                     \
 531      assemble_name ((STREAM), (NAME));                                  \
 532      fprintf ((STREAM), ",%d\n", (int)(SIZE));                          \
 533 } while (0)
 534
 535 #undef TYPE_ASM_OP
 536 #undef SIZE_ASM_OP
 537 #undef WEAK_ASM_OP
 538 #define TYPE_ASM_OP     "\t.type\t"
 539 #define SIZE_ASM_OP     "\t.size\t"
 540 #define WEAK_ASM_OP     "\t.weak\t"
 541 /* Define the strings used for the special svr4 .type and .size directives.
 542    These strings generally do not vary from one system running svr4 to
 543    another, but if a given system (e.g. m88k running svr) needs to use
 544    different pseudo-op names for these, they may be overridden in the
 545    file which includes this one.  */
 546
 547
 548 #undef TYPE_OPERAND_FMT
 549 #define TYPE_OPERAND_FMT        "@%s"
 550 /* The following macro defines the format used to output the second
 551    operand of the .type assembler directive.  Different svr4 assemblers
 552    expect various different forms for this operand.  The one given here
 553    is just a default.  You may need to override it in your machine-
 554    specific tm.h file (depending upon the particulars of your assembler).  */
 555
 556 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 557 do {                                                            \
 558      ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");        \
 559      ASM_OUTPUT_LABEL (FILE, NAME);                             \
 560 } while (0)
 561
 562 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)                    \
 563   do {                                                                  \
 564     if (!flag_inhibit_size_directive)                                   \
 565       ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                           \
 566   } while (0)
 567
 568 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 569 do {                                                                    \
 570   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");                     \
 571   size_directive_output = 0;                                            \
 572   if (!flag_inhibit_size_directive && DECL_SIZE (DECL))                 \
 573     {                                                                   \
 574       size_directive_output = 1;                                        \
 575       ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME,                            \
 576                                  int_size_in_bytes (TREE_TYPE (DECL))); \
 577     }                                                                   \
 578   ASM_OUTPUT_LABEL(FILE, NAME);                                         \
 579 } while (0)
 580
 581 #undef ASM_FINISH_DECLARE_OBJECT
 582 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)         \
 583 do {                                                                     \
 584      const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);             \
 585      HOST_WIDE_INT size;                                                 \
 586      if (!flag_inhibit_size_directive && DECL_SIZE (DECL)                \
 587          && ! AT_END && TOP_LEVEL                                        \
 588          && DECL_INITIAL (DECL) == error_mark_node                       \
 589          && !size_directive_output)                                      \
 590        {                                                                 \
 591          size_directive_output = 1;                                      \
 592          size = int_size_in_bytes (TREE_TYPE (DECL));                    \
 593          ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size);                   \
 594        }                                                                 \
 595    } while (0)
 596
 597
 598 #define ESCAPES \
 599 "\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\
 600 \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\
 601 \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\
 602 \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\
 603 \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\
 604 \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\
 605 \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\
 606 \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"
 607 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
 608    ASM_OUTPUT_LIMITED_STRING macros.  Each byte in the table
 609    corresponds to a particular byte value [0..255].  For any
 610    given byte value, if the value in the corresponding table
 611    position is zero, the given character can be output directly.
 612    If the table value is 1, the byte must be output as a \ooo
 613    octal escape.  If the tables value is anything else, then the
 614    byte value should be output as a \ followed by the value
 615    in the table.  Note that we can use standard UN*X escape
 616    sequences for many control characters, but we don't use
 617    \a to represent BEL because some svr4 assemblers (e.g. on
 618    the i386) don't know about that.  Also, we don't use \v
 619    since some versions of gas, such as 2.2 did not accept it.  */
 620
 621 #define STRING_LIMIT    ((unsigned) 64)
 622 #define STRING_ASM_OP   "\t.string\t"
 623 /* Some svr4 assemblers have a limit on the number of characters which
 624    can appear in the operand of a .string directive.  If your assembler
 625    has such a limitation, you should define STRING_LIMIT to reflect that
 626    limit.  Note that at least some svr4 assemblers have a limit on the
 627    actual number of bytes in the double-quoted string, and that they
 628    count each character in an escape sequence as one byte.  Thus, an
 629    escape sequence like \377 would count as four bytes.
 630
 631    If your target assembler doesn't support the .string directive, you
 632    should define this to zero.  */
 633
 634 /* Globalizing directive for a label.  */
 635 #define GLOBAL_ASM_OP ".global\t"
 636
 637 #define ASM_WEAKEN_LABEL(FILE, NAME)    \
 638   do                                    \
 639     {                                   \
 640       fputs ("\t.weak\t", (FILE));      \
 641       assemble_name ((FILE), (NAME));   \
 642       fputc ('\n', (FILE));             \
 643     }                                   \
 644   while (0)
 645
 646 #define SUPPORTS_WEAK 1
 647
 648 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)        \
 649 sprintf (STRING, "*.%s%lu", PREFIX, (unsigned long)(NUM))
 650
 651 #define HAS_INIT_SECTION 1
 652
 653 #define REGISTER_NAMES {                                \
 654   "r0","r1","r2","r3","r4","r5","r6","r7",              \
 655     "r8","r9","r10","r11","r12","r13","r14","r15",      \
 656     "r16","r17","r18","r19","r20","r21","r22","r23",    \
 657     "r24","r25","r26","r27","r28","r29","r30","r31",    \
 658     "__SPL__","__SPH__","argL","argH"}
 659
 660 #define FINAL_PRESCAN_INSN(insn, operand, nop) final_prescan_insn (insn, operand,nop)
 661
 662 #define PRINT_OPERAND(STREAM, X, CODE) print_operand (STREAM, X, CODE)
 663
 664 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '~')
 665
 666 #define PRINT_OPERAND_ADDRESS(STREAM, X) print_operand_address(STREAM, X)
 667
 668 #define USER_LABEL_PREFIX ""
 669
 670 #define ASSEMBLER_DIALECT AVR_ENHANCED
 671
 672 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO)      \
 673 {                                               \
 674   gcc_assert (REGNO < 32);                      \
 675   fprintf (STREAM, "\tpush\tr%d", REGNO);       \
 676 }
 677
 678 #define ASM_OUTPUT_REG_POP(STREAM, REGNO)       \
 679 {                                               \
 680   gcc_assert (REGNO < 32);                      \
 681   fprintf (STREAM, "\tpop\tr%d", REGNO);        \
 682 }
 683
 684 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)          \
 685   avr_output_addr_vec_elt(STREAM, VALUE)
 686
 687 #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) \
 688   progmem_section (), (*targetm.asm_out.internal_label) (STREAM, PREFIX, NUM)
 689
 690 #define ASM_OUTPUT_SKIP(STREAM, N)              \
 691 fprintf (STREAM, "\t.skip %lu,0\n", (unsigned long)(N))
 692
 693 #define ASM_OUTPUT_ALIGN(STREAM, POWER)                 \
 694   do {                                                  \
 695       if ((POWER) > 1)                                  \
 696           fprintf (STREAM, "\t.p2align\t%d\n", POWER);  \
 697   } while (0)
 698
 699 #define CASE_VECTOR_MODE HImode
 700
 701 extern int avr_case_values_threshold;
 702
 703 #define CASE_VALUES_THRESHOLD avr_case_values_threshold
 704
 705 #undef WORD_REGISTER_OPERATIONS
 706
 707 #define MOVE_MAX 4
 708
 709 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
 710
 711 #define Pmode HImode
 712
 713 #define FUNCTION_MODE HImode
 714
 715 #define DOLLARS_IN_IDENTIFIERS 0
 716
 717 #define NO_DOLLAR_IN_LABEL 1
 718
 719 #define TRAMPOLINE_TEMPLATE(FILE) \
 720   internal_error ("trampolines not supported")
 721
 722 #define TRAMPOLINE_SIZE 4
 723
 724 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)                             \
 725 {                                                                             \
 726   emit_move_insn (gen_rtx_MEM (HImode, plus_constant ((TRAMP), 2)), CXT);    \
 727   emit_move_insn (gen_rtx_MEM (HImode, plus_constant ((TRAMP), 6)), FNADDR); \
 728 }
 729 /* Store in cc_status the expressions
 730    that the condition codes will describe
 731    after execution of an instruction whose pattern is EXP.
 732    Do not alter them if the instruction would not alter the cc's.  */
 733
 734 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
 735
 736 /* The add insns don't set overflow in a usable way.  */
 737 #define CC_OVERFLOW_UNUSABLE 01000
 738 /* The mov,and,or,xor insns don't set carry.  That's ok though as the
 739    Z bit is all we need when doing unsigned comparisons on the result of
 740    these insns (since they're always with 0).  However, conditions.h has
 741    CC_NO_OVERFLOW defined for this purpose.  Rename it to something more
 742    understandable.  */
 743 #define CC_NO_CARRY CC_NO_OVERFLOW
 744
 745
 746 /* Output assembler code to FILE to increment profiler label # LABELNO
 747    for profiling a function entry.  */
 748
 749 #define FUNCTION_PROFILER(FILE, LABELNO)  \
 750   fprintf (FILE, "/* profiler %d */", (LABELNO))
 751
 752 #define ADJUST_INSN_LENGTH(INSN, LENGTH) (LENGTH =\
 753                                           adjust_insn_length (INSN, LENGTH))
 754
 755 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE}"
 756
 757 #define CC1_SPEC "%{profile:-p}"
 758
 759 #define CC1PLUS_SPEC "%{!frtti:-fno-rtti} \
 760     %{!fenforce-eh-specs:-fno-enforce-eh-specs} \
 761     %{!fexceptions:-fno-exceptions}"
 762 /* A C string constant that tells the GCC drvier program options to
 763    pass to `cc1plus'.  */
 764
 765 #define ASM_SPEC "%{mmcu=*:-mmcu=%*}"
 766
 767 #define LINK_SPEC " %{!mmcu*:-m avr2}\
 768 %{mmcu=at90s1200|mmcu=attiny11|mmcu=attiny12|mmcu=attiny15|mmcu=attiny28:-m avr1} \
 769 %{mmcu=attiny22|mmcu=attiny26|mmcu=at90s2*|mmcu=at90s4*|mmcu=at90s8*|mmcu=at90c8*|mmcu=at86rf401|mmcu=attiny13|mmcu=attiny2313:-m avr2}\
 770 %{mmcu=atmega103|mmcu=atmega603|mmcu=at43*|mmcu=at76*:-m avr3}\
 771 %{mmcu=atmega8*|mmcu=atmega48:-m avr4}\
 772 %{mmcu=atmega16*|mmcu=atmega32*|mmcu=atmega64*|mmcu=atmega128|mmcu=at90can128|mmcu=at94k:-m avr5}\
 773 %{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} "
 774
 775 #define LIB_SPEC \
 776   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lc }}}}}"
 777
 778 #define LIBSTDCXX "-lgcc"
 779 /* No libstdc++ for now.  Empty string doesn't work.  */
 780
 781 #define LIBGCC_SPEC \
 782   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lgcc }}}}}"
 783
 784 #define STARTFILE_SPEC "%(crt_binutils)"
 785
 786 #define ENDFILE_SPEC ""
 787
 788 #define CRT_BINUTILS_SPECS "\
 789 %{mmcu=at90s1200|mmcu=avr1:crts1200.o%s} \
 790 %{mmcu=attiny11:crttn11.o%s} \
 791 %{mmcu=attiny12:crttn12.o%s} \
 792 %{mmcu=attiny15:crttn15.o%s} \
 793 %{mmcu=attiny28:crttn28.o%s} \
 794 %{!mmcu*|mmcu=at90s8515|mmcu=avr2:crts8515.o%s} \
 795 %{mmcu=at90s2313:crts2313.o%s} \
 796 %{mmcu=at90s2323:crts2323.o%s} \
 797 %{mmcu=at90s2333:crts2333.o%s} \
 798 %{mmcu=at90s2343:crts2343.o%s} \
 799 %{mmcu=attiny22:crttn22.o%s} \
 800 %{mmcu=attiny26:crttn26.o%s} \
 801 %{mmcu=at90s4433:crts4433.o%s} \
 802 %{mmcu=at90s4414:crts4414.o%s} \
 803 %{mmcu=at90s4434:crts4434.o%s} \
 804 %{mmcu=at90c8534:crtc8534.o%s} \
 805 %{mmcu=at90s8535:crts8535.o%s} \
 806 %{mmcu=at86rf401:crt86401.o%s} \
 807 %{mmcu=attiny13:crttn13.o%s} \
 808 %{mmcu=attiny2313:crttn2313.o%s} \
 809 %{mmcu=atmega103|mmcu=avr3:crtm103.o%s} \
 810 %{mmcu=atmega603:crtm603.o%s} \
 811 %{mmcu=at43usb320:crt43320.o%s} \
 812 %{mmcu=at43usb355:crt43355.o%s} \
 813 %{mmcu=at76c711:crt76711.o%s} \
 814 %{mmcu=atmega8|mmcu=avr4:crtm8.o%s} \
 815 %{mmcu=atmega48:crtm48.o%s} \
 816 %{mmcu=atmega88:crtm88.o%s} \
 817 %{mmcu=atmega8515:crtm8515.o%s} \
 818 %{mmcu=atmega8535:crtm8535.o%s} \
 819 %{mmcu=atmega16:crtm16.o%s} \
 820 %{mmcu=atmega161|mmcu=avr5:crtm161.o%s} \
 821 %{mmcu=atmega162:crtm162.o%s} \
 822 %{mmcu=atmega163:crtm163.o%s} \
 823 %{mmcu=atmega165:crtm165.o%s} \
 824 %{mmcu=atmega168:crtm168.o%s} \
 825 %{mmcu=atmega169:crtm169.o%s} \
 826 %{mmcu=atmega32:crtm32.o%s} \
 827 %{mmcu=atmega323:crtm323.o%s} \
 828 %{mmcu=atmega325:crtm325.o%s} \
 829 %{mmcu=atmega3250:crtm3250.o%s} \
 830 %{mmcu=atmega64:crtm64.o%s} \
 831 %{mmcu=atmega645:crtm6450.o%s} \
 832 %{mmcu=atmega6450:crtm6450.o%s} \
 833 %{mmcu=atmega128:crtm128.o%s} \
 834 %{mmcu=at90can128:crtcan128.o%s} \
 835 %{mmcu=at94k:crtat94k.o%s}"
 836
 837 #define EXTRA_SPECS {"crt_binutils", CRT_BINUTILS_SPECS},
 838
 839 /* This is the default without any -mmcu=* option (AT90S*).  */
 840 #define MULTILIB_DEFAULTS { "mmcu=avr2" }
 841
 842 /* This is undefined macro for collect2 disabling */
 843 #define LINKER_NAME "ld"
 844
 845 #define TEST_HARD_REG_CLASS(CLASS, REGNO) \
 846   TEST_HARD_REG_BIT (reg_class_contents[ (int) (CLASS)], REGNO)
 847
 848 /* Note that the other files fail to use these
 849    in some of the places where they should.  */
 850
 851 #if defined(__STDC__) || defined(ALMOST_STDC)
 852 #define AS2(a,b,c) #a " " #b "," #c
 853 #define AS2C(b,c) " " #b "," #c
 854 #define AS3(a,b,c,d) #a " " #b "," #c "," #d
 855 #define AS1(a,b) #a " " #b
 856 #else
 857 #define AS1(a,b) "a     b"
 858 #define AS2(a,b,c) "a   b,c"
 859 #define AS2C(b,c) " b,c"
 860 #define AS3(a,b,c,d) "a b,c,d"
 861 #endif
 862 #define OUT_AS1(a,b) output_asm_insn (AS1(a,b), operands)
 863 #define OUT_AS2(a,b,c) output_asm_insn (AS2(a,b,c), operands)
 864 #define CR_TAB "\n\t"
 865
 866 /* Temporary register r0 */
 867 #define TMP_REGNO 0
 868
 869 /* zero register r1 */
 870 #define ZERO_REGNO 1
 871
 872 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 873
 874 #define DWARF2_DEBUGGING_INFO 1
 875
 876 #define DWARF2_ADDR_SIZE 4
 877
 878 #define OBJECT_FORMAT_ELF