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
   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 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 #define ELIMINABLE_REGS {                                       \
 302       {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},               \
 303         {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}            \
 304        ,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}}
 305
 306 #define CAN_ELIMINATE(FROM, TO) (((FROM) == ARG_POINTER_REGNUM             \
 307                                   && (TO) == FRAME_POINTER_REGNUM)         \
 308                                  || (((FROM) == FRAME_POINTER_REGNUM       \
 309                                       || (FROM) == FRAME_POINTER_REGNUM+1) \
 310                                      && ! FRAME_POINTER_REQUIRED           \
 311                                      ))
 312
 313 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                    \
 314      OFFSET = initial_elimination_offset (FROM, TO)
 315
 316 #define RETURN_ADDR_RTX(count, x) \
 317   gen_rtx_MEM (Pmode, memory_address (Pmode, plus_constant (tem, 1)))
 318
 319 #define PUSH_ROUNDING(NPUSHED) (NPUSHED)
 320
 321 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
 322
 323 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) (function_arg (&(CUM), MODE, TYPE, NAMED))
 324
 325 typedef struct avr_args {
 326   int nregs;                    /* # registers available for passing */
 327   int regno;                    /* next available register number */
 328 } CUMULATIVE_ARGS;
 329
 330 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
 331   init_cumulative_args (&(CUM), FNTYPE, LIBNAME, FNDECL)
 332
 333 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)    \
 334   (function_arg_advance (&CUM, MODE, TYPE, NAMED))
 335
 336 #define FUNCTION_ARG_REGNO_P(r) function_arg_regno_p(r)
 337
 338 extern int avr_reg_order[];
 339
 340 #define RET_REGISTER avr_ret_register ()
 341
 342 #define FUNCTION_VALUE(VALTYPE, FUNC) avr_function_value (VALTYPE, FUNC)
 343
 344 #define LIBCALL_VALUE(MODE)  avr_libcall_value (MODE)
 345
 346 #define FUNCTION_VALUE_REGNO_P(N) ((int) (N) == RET_REGISTER)
 347
 348 #define DEFAULT_PCC_STRUCT_RETURN 0
 349
 350 #define EPILOGUE_USES(REGNO) 0
 351
 352 #define HAVE_POST_INCREMENT 1
 353 #define HAVE_PRE_DECREMENT 1
 354
 355 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
 356
 357 #define MAX_REGS_PER_ADDRESS 1
 358
 359 #ifdef REG_OK_STRICT
 360 #  define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
 361 {                                                       \
 362   if (legitimate_address_p (mode, operand, 1))          \
 363     goto ADDR;                                          \
 364 }
 365 #  else
 366 #  define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
 367 {                                                       \
 368   if (legitimate_address_p (mode, operand, 0))          \
 369     goto ADDR;                                          \
 370 }
 371 #endif
 372
 373 #define REG_OK_FOR_BASE_NOSTRICT_P(X) \
 374   (REGNO (X) >= FIRST_PSEUDO_REGISTER || REG_OK_FOR_BASE_STRICT_P(X))
 375
 376 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
 377
 378 #ifdef REG_OK_STRICT
 379 #  define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P (X)
 380 #else
 381 #  define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NOSTRICT_P (X)
 382 #endif
 383
 384 #define REG_OK_FOR_INDEX_P(X) 0
 385
 386 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)                          \
 387 {                                                                       \
 388   (X) = legitimize_address (X, OLDX, MODE);                             \
 389   if (memory_address_p (MODE, X))                                       \
 390     goto WIN;                                                           \
 391 }
 392
 393 #define XEXP_(X,Y) (X)
 394 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN)    \
 395 do {                                                                        \
 396   if (1&&(GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC))     \
 397     {                                                                       \
 398       push_reload (XEXP (X,0), XEXP (X,0), &XEXP (X,0), &XEXP (X,0),        \
 399                    POINTER_REGS, GET_MODE (X),GET_MODE (X) , 0, 0,          \
 400                    OPNUM, RELOAD_OTHER);                                    \
 401       goto WIN;                                                             \
 402     }                                                                       \
 403   if (GET_CODE (X) == PLUS                                                  \
 404       && REG_P (XEXP (X, 0))                                                \
 405       && GET_CODE (XEXP (X, 1)) == CONST_INT                                \
 406       && INTVAL (XEXP (X, 1)) >= 1)                                         \
 407     {                                                                       \
 408       int fit = INTVAL (XEXP (X, 1)) <= (64 - GET_MODE_SIZE (MODE));        \
 409       if (fit)                                                              \
 410         {                                                                   \
 411           if (reg_equiv_address[REGNO (XEXP (X, 0))] != 0)                  \
 412             {                                                               \
 413               int regno = REGNO (XEXP (X, 0));                              \
 414               rtx mem = make_memloc (X, regno);                             \
 415               push_reload (XEXP (mem,0), NULL, &XEXP (mem,0), NULL,         \
 416                            POINTER_REGS, Pmode, VOIDmode, 0, 0,             \
 417                            1, ADDR_TYPE (TYPE));                            \
 418               push_reload (mem, NULL_RTX, &XEXP (X, 0), NULL,               \
 419                            BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
 420                            OPNUM, TYPE);                                    \
 421               goto WIN;                                                     \
 422             }                                                               \
 423           push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL,           \
 424                        BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0,     \
 425                        OPNUM, TYPE);                                        \
 426           goto WIN;                                                         \
 427         }                                                                   \
 428       else if (! (frame_pointer_needed && XEXP (X,0) == frame_pointer_rtx)) \
 429         {                                                                   \
 430           push_reload (X, NULL_RTX, &X, NULL,                               \
 431                        POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0,          \
 432                        OPNUM, TYPE);                                        \
 433           goto WIN;                                                         \
 434         }                                                                   \
 435     }                                                                       \
 436 } while(0)
 437
 438 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)                        \
 439       if (GET_CODE (ADDR) == POST_INC || GET_CODE (ADDR) == PRE_DEC)    \
 440         goto LABEL
 441
 442 #define LEGITIMATE_CONSTANT_P(X) 1
 443
 444 #define REGISTER_MOVE_COST(MODE, FROM, TO) ((FROM) == STACK_REG ? 6 \
 445                                             : (TO) == STACK_REG ? 12 \
 446                                             : 2)
 447
 448 #define MEMORY_MOVE_COST(MODE,CLASS,IN) ((MODE)==QImode ? 2 :   \
 449                                          (MODE)==HImode ? 4 :   \
 450                                          (MODE)==SImode ? 8 :   \
 451                                          (MODE)==SFmode ? 8 : 16)
 452
 453 #define BRANCH_COST 0
 454
 455 #define SLOW_BYTE_ACCESS 0
 456
 457 #define NO_FUNCTION_CSE
 458
 459 #define TEXT_SECTION_ASM_OP "\t.text"
 460
 461 #define DATA_SECTION_ASM_OP "\t.data"
 462
 463 #define BSS_SECTION_ASM_OP "\t.section .bss"
 464
 465 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
 466    There are no shared libraries on this target, and these sections are
 467    placed in the read-only program memory, so they are not writable.  */
 468
 469 #undef CTORS_SECTION_ASM_OP
 470 #define CTORS_SECTION_ASM_OP "\t.section .ctors,\"a\",@progbits"
 471
 472 #undef DTORS_SECTION_ASM_OP
 473 #define DTORS_SECTION_ASM_OP "\t.section .dtors,\"a\",@progbits"
 474
 475 #define TARGET_ASM_CONSTRUCTOR avr_asm_out_ctor
 476
 477 #define TARGET_ASM_DESTRUCTOR avr_asm_out_dtor
 478
 479 #define EXTRA_SECTIONS in_progmem
 480
 481 #define EXTRA_SECTION_FUNCTIONS                                               \
 482                                                                               \
 483 void                                                                          \
 484 progmem_section (void)                                                        \
 485 {                                                                             \
 486   if (in_section != in_progmem)                                               \
 487     {                                                                         \
 488       fprintf (asm_out_file,                                                  \
 489                "\t.section .progmem.gcc_sw_table, \"%s\", @progbits\n",       \
 490                AVR_MEGA ? "a" : "ax");                                        \
 491       /* Should already be aligned, this is just to be safe if it isn't.  */  \
 492       fprintf (asm_out_file, "\t.p2align 1\n");                               \
 493       in_section = in_progmem;                                                \
 494     }                                                                         \
 495 }
 496
 497 #define READONLY_DATA_SECTION data_section
 498
 499 #define JUMP_TABLES_IN_TEXT_SECTION 0
 500
 501 #define ASM_COMMENT_START " ; "
 502
 503 #define ASM_APP_ON "/* #APP */\n"
 504
 505 #define ASM_APP_OFF "/* #NOAPP */\n"
 506
 507 /* Switch into a generic section.  */
 508 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
 509
 510 #define ASM_OUTPUT_ASCII(FILE, P, SIZE)  gas_output_ascii (FILE,P,SIZE)
 511
 512 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == '\n'                    \
 513                                           || ((C) == '$'))
 514
 515 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)                     \
 516 do {                                                                       \
 517      fputs ("\t.comm ", (STREAM));                                         \
 518      assemble_name ((STREAM), (NAME));                                     \
 519      fprintf ((STREAM), ",%lu,1\n", (unsigned long)(SIZE));                \
 520 } while (0)
 521
 522 #define ASM_OUTPUT_BSS(FILE, DECL, NAME, SIZE, ROUNDED)                 \
 523   asm_output_bss ((FILE), (DECL), (NAME), (SIZE), (ROUNDED))
 524
 525 #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED)                   \
 526 do {                                                                    \
 527      fputs ("\t.lcomm ", (STREAM));                                     \
 528      assemble_name ((STREAM), (NAME));                                  \
 529      fprintf ((STREAM), ",%d\n", (int)(SIZE));                          \
 530 } while (0)
 531
 532 #undef TYPE_ASM_OP
 533 #undef SIZE_ASM_OP
 534 #undef WEAK_ASM_OP
 535 #define TYPE_ASM_OP     "\t.type\t"
 536 #define SIZE_ASM_OP     "\t.size\t"
 537 #define WEAK_ASM_OP     "\t.weak\t"
 538 /* Define the strings used for the special svr4 .type and .size directives.
 539    These strings generally do not vary from one system running svr4 to
 540    another, but if a given system (e.g. m88k running svr) needs to use
 541    different pseudo-op names for these, they may be overridden in the
 542    file which includes this one.  */
 543
 544
 545 #undef TYPE_OPERAND_FMT
 546 #define TYPE_OPERAND_FMT        "@%s"
 547 /* The following macro defines the format used to output the second
 548    operand of the .type assembler directive.  Different svr4 assemblers
 549    expect various different forms for this operand.  The one given here
 550    is just a default.  You may need to override it in your machine-
 551    specific tm.h file (depending upon the particulars of your assembler).  */
 552
 553 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 554 do {                                                            \
 555      ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");        \
 556      ASM_OUTPUT_LABEL (FILE, NAME);                             \
 557 } while (0)
 558
 559 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)                    \
 560   do {                                                                  \
 561     if (!flag_inhibit_size_directive)                                   \
 562       ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                           \
 563   } while (0)
 564
 565 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 566 do {                                                                    \
 567   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");                     \
 568   size_directive_output = 0;                                            \
 569   if (!flag_inhibit_size_directive && DECL_SIZE (DECL))                 \
 570     {                                                                   \
 571       size_directive_output = 1;                                        \
 572       ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME,                            \
 573                                  int_size_in_bytes (TREE_TYPE (DECL))); \
 574     }                                                                   \
 575   ASM_OUTPUT_LABEL(FILE, NAME);                                         \
 576 } while (0)
 577
 578 #undef ASM_FINISH_DECLARE_OBJECT
 579 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)         \
 580 do {                                                                     \
 581      const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);             \
 582      HOST_WIDE_INT size;                                                 \
 583      if (!flag_inhibit_size_directive && DECL_SIZE (DECL)                \
 584          && ! AT_END && TOP_LEVEL                                        \
 585          && DECL_INITIAL (DECL) == error_mark_node                       \
 586          && !size_directive_output)                                      \
 587        {                                                                 \
 588          size_directive_output = 1;                                      \
 589          size = int_size_in_bytes (TREE_TYPE (DECL));                    \
 590          ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size);                   \
 591        }                                                                 \
 592    } while (0)
 593
 594
 595 #define ESCAPES \
 596 "\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\
 597 \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\
 598 \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\
 599 \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\
 600 \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\
 601 \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\
 602 \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\
 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 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
 605    ASM_OUTPUT_LIMITED_STRING macros.  Each byte in the table
 606    corresponds to a particular byte value [0..255].  For any
 607    given byte value, if the value in the corresponding table
 608    position is zero, the given character can be output directly.
 609    If the table value is 1, the byte must be output as a \ooo
 610    octal escape.  If the tables value is anything else, then the
 611    byte value should be output as a \ followed by the value
 612    in the table.  Note that we can use standard UN*X escape
 613    sequences for many control characters, but we don't use
 614    \a to represent BEL because some svr4 assemblers (e.g. on
 615    the i386) don't know about that.  Also, we don't use \v
 616    since some versions of gas, such as 2.2 did not accept it.  */
 617
 618 #define STRING_LIMIT    ((unsigned) 64)
 619 #define STRING_ASM_OP   "\t.string\t"
 620 /* Some svr4 assemblers have a limit on the number of characters which
 621    can appear in the operand of a .string directive.  If your assembler
 622    has such a limitation, you should define STRING_LIMIT to reflect that
 623    limit.  Note that at least some svr4 assemblers have a limit on the
 624    actual number of bytes in the double-quoted string, and that they
 625    count each character in an escape sequence as one byte.  Thus, an
 626    escape sequence like \377 would count as four bytes.
 627
 628    If your target assembler doesn't support the .string directive, you
 629    should define this to zero.  */
 630
 631 /* Globalizing directive for a label.  */
 632 #define GLOBAL_ASM_OP ".global\t"
 633
 634 #define ASM_WEAKEN_LABEL(FILE, NAME)    \
 635   do                                    \
 636     {                                   \
 637       fputs ("\t.weak\t", (FILE));      \
 638       assemble_name ((FILE), (NAME));   \
 639       fputc ('\n', (FILE));             \
 640     }                                   \
 641   while (0)
 642
 643 #define SUPPORTS_WEAK 1
 644
 645 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)        \
 646 sprintf (STRING, "*.%s%lu", PREFIX, (unsigned long)(NUM))
 647
 648 #define HAS_INIT_SECTION 1
 649
 650 #define REGISTER_NAMES {                                \
 651   "r0","r1","r2","r3","r4","r5","r6","r7",              \
 652     "r8","r9","r10","r11","r12","r13","r14","r15",      \
 653     "r16","r17","r18","r19","r20","r21","r22","r23",    \
 654     "r24","r25","r26","r27","r28","r29","r30","r31",    \
 655     "__SPL__","__SPH__","argL","argH"}
 656
 657 #define FINAL_PRESCAN_INSN(insn, operand, nop) final_prescan_insn (insn, operand,nop)
 658
 659 #define PRINT_OPERAND(STREAM, X, CODE) print_operand (STREAM, X, CODE)
 660
 661 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '~')
 662
 663 #define PRINT_OPERAND_ADDRESS(STREAM, X) print_operand_address(STREAM, X)
 664
 665 #define USER_LABEL_PREFIX ""
 666
 667 #define ASSEMBLER_DIALECT AVR_ENHANCED
 668
 669 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO)      \
 670 {                                               \
 671   gcc_assert (REGNO < 32);                      \
 672   fprintf (STREAM, "\tpush\tr%d", REGNO);       \
 673 }
 674
 675 #define ASM_OUTPUT_REG_POP(STREAM, REGNO)       \
 676 {                                               \
 677   gcc_assert (REGNO < 32);                      \
 678   fprintf (STREAM, "\tpop\tr%d", REGNO);        \
 679 }
 680
 681 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)          \
 682   avr_output_addr_vec_elt(STREAM, VALUE)
 683
 684 #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) \
 685   progmem_section (), (*targetm.asm_out.internal_label) (STREAM, PREFIX, NUM)
 686
 687 #define ASM_OUTPUT_SKIP(STREAM, N)              \
 688 fprintf (STREAM, "\t.skip %lu,0\n", (unsigned long)(N))
 689
 690 #define ASM_OUTPUT_ALIGN(STREAM, POWER)
 691
 692 #define CASE_VECTOR_MODE HImode
 693
 694 extern int avr_case_values_threshold;
 695
 696 #define CASE_VALUES_THRESHOLD avr_case_values_threshold
 697
 698 #undef WORD_REGISTER_OPERATIONS
 699
 700 #define MOVE_MAX 4
 701
 702 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
 703
 704 #define Pmode HImode
 705
 706 #define FUNCTION_MODE HImode
 707
 708 #define DOLLARS_IN_IDENTIFIERS 0
 709
 710 #define NO_DOLLAR_IN_LABEL 1
 711
 712 #define TRAMPOLINE_TEMPLATE(FILE) \
 713   internal_error ("trampolines not supported")
 714
 715 #define TRAMPOLINE_SIZE 4
 716
 717 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)                             \
 718 {                                                                             \
 719   emit_move_insn (gen_rtx_MEM (HImode, plus_constant ((TRAMP), 2)), CXT);    \
 720   emit_move_insn (gen_rtx_MEM (HImode, plus_constant ((TRAMP), 6)), FNADDR); \
 721 }
 722 /* Store in cc_status the expressions
 723    that the condition codes will describe
 724    after execution of an instruction whose pattern is EXP.
 725    Do not alter them if the instruction would not alter the cc's.  */
 726
 727 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
 728
 729 /* The add insns don't set overflow in a usable way.  */
 730 #define CC_OVERFLOW_UNUSABLE 01000
 731 /* The mov,and,or,xor insns don't set carry.  That's ok though as the
 732    Z bit is all we need when doing unsigned comparisons on the result of
 733    these insns (since they're always with 0).  However, conditions.h has
 734    CC_NO_OVERFLOW defined for this purpose.  Rename it to something more
 735    understandable.  */
 736 #define CC_NO_CARRY CC_NO_OVERFLOW
 737
 738
 739 /* Output assembler code to FILE to increment profiler label # LABELNO
 740    for profiling a function entry.  */
 741
 742 #define FUNCTION_PROFILER(FILE, LABELNO)  \
 743   fprintf (FILE, "/* profiler %d */", (LABELNO))
 744
 745 #define ADJUST_INSN_LENGTH(INSN, LENGTH) (LENGTH =\
 746                                           adjust_insn_length (INSN, LENGTH))
 747
 748 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE}"
 749
 750 #define CC1_SPEC "%{profile:-p}"
 751
 752 #define CC1PLUS_SPEC "%{!frtti:-fno-rtti} \
 753     %{!fenforce-eh-specs:-fno-enforce-eh-specs} \
 754     %{!fexceptions:-fno-exceptions}"
 755 /* A C string constant that tells the GCC drvier program options to
 756    pass to `cc1plus'.  */
 757
 758 #define ASM_SPEC "%{mmcu=*:-mmcu=%*}"
 759
 760 #define LINK_SPEC " %{!mmcu*:-m avr2}\
 761 %{mmcu=at90s1200|mmcu=attiny11|mmcu=attiny12|mmcu=attiny15|mmcu=attiny28:-m avr1} \
 762 %{mmcu=attiny22|mmcu=attiny26|mmcu=at90s2*|mmcu=at90s4*|mmcu=at90s8*|mmcu=at90c8*|mmcu=at86rf401|mmcu=attiny13|mmcu=attiny2313:-m avr2}\
 763 %{mmcu=atmega103|mmcu=atmega603|mmcu=at43*|mmcu=at76*:-m avr3}\
 764 %{mmcu=atmega8*|mmcu=atmega48:-m avr4}\
 765 %{mmcu=atmega16*|mmcu=atmega32*|mmcu=atmega64*|mmcu=atmega128|mmcu=at90can128|mmcu=at94k:-m avr5}\
 766 %{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} "
 767
 768 #define LIB_SPEC \
 769   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lc }}}}}"
 770
 771 #define LIBSTDCXX "-lgcc"
 772 /* No libstdc++ for now.  Empty string doesn't work.  */
 773
 774 #define LIBGCC_SPEC \
 775   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lgcc }}}}}"
 776
 777 #define STARTFILE_SPEC "%(crt_binutils)"
 778
 779 #define ENDFILE_SPEC ""
 780
 781 #define CRT_BINUTILS_SPECS "\
 782 %{mmcu=at90s1200|mmcu=avr1:crts1200.o%s} \
 783 %{mmcu=attiny11:crttn11.o%s} \
 784 %{mmcu=attiny12:crttn12.o%s} \
 785 %{mmcu=attiny15:crttn15.o%s} \
 786 %{mmcu=attiny28:crttn28.o%s} \
 787 %{!mmcu*|mmcu=at90s8515|mmcu=avr2:crts8515.o%s} \
 788 %{mmcu=at90s2313:crts2313.o%s} \
 789 %{mmcu=at90s2323:crts2323.o%s} \
 790 %{mmcu=at90s2333:crts2333.o%s} \
 791 %{mmcu=at90s2343:crts2343.o%s} \
 792 %{mmcu=attiny22:crttn22.o%s} \
 793 %{mmcu=attiny26:crttn26.o%s} \
 794 %{mmcu=at90s4433:crts4433.o%s} \
 795 %{mmcu=at90s4414:crts4414.o%s} \
 796 %{mmcu=at90s4434:crts4434.o%s} \
 797 %{mmcu=at90c8534:crtc8534.o%s} \
 798 %{mmcu=at90s8535:crts8535.o%s} \
 799 %{mmcu=at86rf401:crt86401.o%s} \
 800 %{mmcu=attiny13:crttn13.o%s} \
 801 %{mmcu=attiny2313:crttn2313.o%s} \
 802 %{mmcu=atmega103|mmcu=avr3:crtm103.o%s} \
 803 %{mmcu=atmega603:crtm603.o%s} \
 804 %{mmcu=at43usb320:crt43320.o%s} \
 805 %{mmcu=at43usb355:crt43355.o%s} \
 806 %{mmcu=at76c711:crt76711.o%s} \
 807 %{mmcu=atmega8|mmcu=avr4:crtm8.o%s} \
 808 %{mmcu=atmega48:crtm48.o%s} \
 809 %{mmcu=atmega88:crtm88.o%s} \
 810 %{mmcu=atmega8515:crtm8515.o%s} \
 811 %{mmcu=atmega8535:crtm8535.o%s} \
 812 %{mmcu=atmega16:crtm16.o%s} \
 813 %{mmcu=atmega161|mmcu=avr5:crtm161.o%s} \
 814 %{mmcu=atmega162:crtm162.o%s} \
 815 %{mmcu=atmega163:crtm163.o%s} \
 816 %{mmcu=atmega165:crtm165.o%s} \
 817 %{mmcu=atmega168:crtm168.o%s} \
 818 %{mmcu=atmega169:crtm169.o%s} \
 819 %{mmcu=atmega32:crtm32.o%s} \
 820 %{mmcu=atmega323:crtm323.o%s} \
 821 %{mmcu=atmega325:crtm325.o%s} \
 822 %{mmcu=atmega3250:crtm3250.o%s} \
 823 %{mmcu=atmega64:crtm64.o%s} \
 824 %{mmcu=atmega645:crtm6450.o%s} \
 825 %{mmcu=atmega6450:crtm6450.o%s} \
 826 %{mmcu=atmega128:crtm128.o%s} \
 827 %{mmcu=at90can128:crtcan128.o%s} \
 828 %{mmcu=at94k:crtat94k.o%s}"
 829
 830 #define EXTRA_SPECS {"crt_binutils", CRT_BINUTILS_SPECS},
 831
 832 /* This is the default without any -mmcu=* option (AT90S*).  */
 833 #define MULTILIB_DEFAULTS { "mmcu=avr2" }
 834
 835 /* This is undefined macro for collect2 disabling */
 836 #define LINKER_NAME "ld"
 837
 838 #define TEST_HARD_REG_CLASS(CLASS, REGNO) \
 839   TEST_HARD_REG_BIT (reg_class_contents[ (int) (CLASS)], REGNO)
 840
 841 /* Note that the other files fail to use these
 842    in some of the places where they should.  */
 843
 844 #if defined(__STDC__) || defined(ALMOST_STDC)
 845 #define AS2(a,b,c) #a " " #b "," #c
 846 #define AS2C(b,c) " " #b "," #c
 847 #define AS3(a,b,c,d) #a " " #b "," #c "," #d
 848 #define AS1(a,b) #a " " #b
 849 #else
 850 #define AS1(a,b) "a     b"
 851 #define AS2(a,b,c) "a   b,c"
 852 #define AS2C(b,c) " b,c"
 853 #define AS3(a,b,c,d) "a b,c,d"
 854 #endif
 855 #define OUT_AS1(a,b) output_asm_insn (AS1(a,b), operands)
 856 #define OUT_AS2(a,b,c) output_asm_insn (AS2(a,b,c), operands)
 857 #define CR_TAB "\n\t"
 858
 859 /* Temporary register r0 */
 860 #define TMP_REGNO 0
 861
 862 /* zero register r1 */
 863 #define ZERO_REGNO 1
 864
 865 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG