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
   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_have_movw_lpmx_p)                 \
  35         builtin_define ("__AVR_HAVE_MOVW__");   \
  36       if (avr_have_movw_lpmx_p)                 \
  37         builtin_define ("__AVR_HAVE_LPMX__");   \
  38       if (avr_asm_only_p)                       \
  39         builtin_define ("__AVR_ASM_ONLY__");    \
  40       if (avr_enhanced_p)                       \
  41         builtin_define ("__AVR_ENHANCED__");    \
  42       if (avr_mega_p)                           \
  43         builtin_define ("__AVR_MEGA__");        \
  44       if (TARGET_NO_INTERRUPTS)                 \
  45         builtin_define ("__NO_INTERRUPTS__");   \
  46     }                                           \
  47   while (0)
  48
  49 extern const char *avr_base_arch_macro;
  50 extern const char *avr_extra_arch_macro;
  51 extern int avr_mega_p;
  52 extern int avr_enhanced_p;
  53 extern int avr_asm_only_p;
  54 extern int avr_have_movw_lpmx_p;
  55 #ifndef IN_LIBGCC2
  56 extern GTY(()) section *progmem_section;
  57 #endif
  58
  59 #define AVR_MEGA (avr_mega_p && !TARGET_SHORT_CALLS)
  60 #define AVR_ENHANCED (avr_enhanced_p)
  61 #define AVR_HAVE_MOVW (avr_have_movw_lpmx_p)
  62
  63 #define TARGET_VERSION fprintf (stderr, " (GNU assembler syntax)");
  64
  65 #define OVERRIDE_OPTIONS avr_override_options ()
  66
  67 #define CAN_DEBUG_WITHOUT_FP
  68
  69 #define BITS_BIG_ENDIAN 0
  70 #define BYTES_BIG_ENDIAN 0
  71 #define WORDS_BIG_ENDIAN 0
  72
  73 #ifdef IN_LIBGCC2
  74 /* This is to get correct SI and DI modes in libgcc2.c (32 and 64 bits).  */
  75 #define UNITS_PER_WORD 4
  76 #else
  77 /* Width of a word, in units (bytes).  */
  78 #define UNITS_PER_WORD 1
  79 #endif
  80
  81 #define POINTER_SIZE 16
  82
  83
  84 /* Maximum sized of reasonable data type
  85    DImode or Dfmode ...  */
  86 #define MAX_FIXED_MODE_SIZE 32
  87
  88 #define PARM_BOUNDARY 8
  89
  90 #define FUNCTION_BOUNDARY 8
  91
  92 #define EMPTY_FIELD_BOUNDARY 8
  93
  94 /* No data type wants to be aligned rounder than this.  */
  95 #define BIGGEST_ALIGNMENT 8
  96
  97
  98 #define STRICT_ALIGNMENT 0
  99
 100 #define INT_TYPE_SIZE (TARGET_INT8 ? 8 : 16)
 101 #define SHORT_TYPE_SIZE (INT_TYPE_SIZE == 8 ? INT_TYPE_SIZE : 16)
 102 #define LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 16 : 32)
 103 #define LONG_LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 32 : 64)
 104 #define FLOAT_TYPE_SIZE 32
 105 #define DOUBLE_TYPE_SIZE 32
 106 #define LONG_DOUBLE_TYPE_SIZE 32
 107
 108 #define DEFAULT_SIGNED_CHAR 1
 109
 110 #define SIZE_TYPE (INT_TYPE_SIZE == 8 ? "long unsigned int" : "unsigned int")
 111 #define PTRDIFF_TYPE (INT_TYPE_SIZE == 8 ? "long int" :"int")
 112
 113 #define WCHAR_TYPE_SIZE 16
 114
 115 #define FIRST_PSEUDO_REGISTER 36
 116
 117 #define FIXED_REGISTERS {\
 118   1,1,/* r0 r1 */\
 119   0,0,/* r2 r3 */\
 120   0,0,/* r4 r5 */\
 121   0,0,/* r6 r7 */\
 122   0,0,/* r8 r9 */\
 123   0,0,/* r10 r11 */\
 124   0,0,/* r12 r13 */\
 125   0,0,/* r14 r15 */\
 126   0,0,/* r16 r17 */\
 127   0,0,/* r18 r19 */\
 128   0,0,/* r20 r21 */\
 129   0,0,/* r22 r23 */\
 130   0,0,/* r24 r25 */\
 131   0,0,/* r26 r27 */\
 132   0,0,/* r28 r29 */\
 133   0,0,/* r30 r31 */\
 134   1,1,/*  STACK */\
 135   1,1 /* arg pointer */  }
 136
 137 #define CALL_USED_REGISTERS {                   \
 138   1,1,/* r0 r1 */                               \
 139     0,0,/* r2 r3 */                             \
 140     0,0,/* r4 r5 */                             \
 141     0,0,/* r6 r7 */                             \
 142     0,0,/* r8 r9 */                             \
 143     0,0,/* r10 r11 */                           \
 144     0,0,/* r12 r13 */                           \
 145     0,0,/* r14 r15 */                           \
 146     0,0,/* r16 r17 */                           \
 147     1,1,/* r18 r19 */                           \
 148     1,1,/* r20 r21 */                           \
 149     1,1,/* r22 r23 */                           \
 150     1,1,/* r24 r25 */                           \
 151     1,1,/* r26 r27 */                           \
 152     0,0,/* r28 r29 */                           \
 153     1,1,/* r30 r31 */                           \
 154     1,1,/*  STACK */                            \
 155     1,1 /* arg pointer */  }
 156
 157 #define REG_ALLOC_ORDER {                       \
 158     24,25,                                      \
 159     18,19,                                      \
 160     20,21,                                      \
 161     22,23,                                      \
 162     30,31,                                      \
 163     26,27,                                      \
 164     28,29,                                      \
 165     17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,    \
 166     0,1,                                        \
 167     32,33,34,35                                 \
 168     }
 169
 170 #define ORDER_REGS_FOR_LOCAL_ALLOC order_regs_for_local_alloc ()
 171
 172
 173 #define HARD_REGNO_NREGS(REGNO, MODE) ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
 174
 175 #define HARD_REGNO_MODE_OK(REGNO, MODE) avr_hard_regno_mode_ok(REGNO, MODE)
 176
 177 #define MODES_TIEABLE_P(MODE1, MODE2) 1
 178
 179 enum reg_class {
 180   NO_REGS,
 181   R0_REG,                       /* r0 */
 182   POINTER_X_REGS,               /* r26 - r27 */
 183   POINTER_Y_REGS,               /* r28 - r29 */
 184   POINTER_Z_REGS,               /* r30 - r31 */
 185   STACK_REG,                    /* STACK */
 186   BASE_POINTER_REGS,            /* r28 - r31 */
 187   POINTER_REGS,                 /* r26 - r31 */
 188   ADDW_REGS,                    /* r24 - r31 */
 189   SIMPLE_LD_REGS,               /* r16 - r23 */
 190   LD_REGS,                      /* r16 - r31 */
 191   NO_LD_REGS,                   /* r0 - r15 */
 192   GENERAL_REGS,                 /* r0 - r31 */
 193   ALL_REGS, LIM_REG_CLASSES
 194 };
 195
 196
 197 #define N_REG_CLASSES (int)LIM_REG_CLASSES
 198
 199 #define REG_CLASS_NAMES {                                       \
 200                  "NO_REGS",                                     \
 201                    "R0_REG",    /* r0 */                        \
 202                    "POINTER_X_REGS", /* r26 - r27 */            \
 203                    "POINTER_Y_REGS", /* r28 - r29 */            \
 204                    "POINTER_Z_REGS", /* r30 - r31 */            \
 205                    "STACK_REG", /* STACK */                     \
 206                    "BASE_POINTER_REGS", /* r28 - r31 */         \
 207                    "POINTER_REGS", /* r26 - r31 */              \
 208                    "ADDW_REGS", /* r24 - r31 */                 \
 209                    "SIMPLE_LD_REGS", /* r16 - r23 */            \
 210                    "LD_REGS",   /* r16 - r31 */                 \
 211                    "NO_LD_REGS", /* r0 - r15 */                 \
 212                    "GENERAL_REGS", /* r0 - r31 */               \
 213                    "ALL_REGS" }
 214
 215 #define REG_CLASS_CONTENTS {                                            \
 216   {0x00000000,0x00000000},      /* NO_REGS */                           \
 217   {0x00000001,0x00000000},      /* R0_REG */                            \
 218   {3 << REG_X,0x00000000},      /* POINTER_X_REGS, r26 - r27 */         \
 219   {3 << REG_Y,0x00000000},      /* POINTER_Y_REGS, r28 - r29 */         \
 220   {3 << REG_Z,0x00000000},      /* POINTER_Z_REGS, r30 - r31 */         \
 221   {0x00000000,0x00000003},      /* STACK_REG, STACK */                  \
 222   {(3 << REG_Y) | (3 << REG_Z),                                         \
 223      0x00000000},               /* BASE_POINTER_REGS, r28 - r31 */      \
 224   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z),                          \
 225      0x00000000},               /* POINTER_REGS, r26 - r31 */           \
 226   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z) | (3 << REG_W),           \
 227      0x00000000},               /* ADDW_REGS, r24 - r31 */              \
 228   {0x00ff0000,0x00000000},      /* SIMPLE_LD_REGS r16 - r23 */          \
 229   {(3 << REG_X)|(3 << REG_Y)|(3 << REG_Z)|(3 << REG_W)|(0xff << 16),    \
 230      0x00000000},       /* LD_REGS, r16 - r31 */                        \
 231   {0x0000ffff,0x00000000},      /* NO_LD_REGS  r0 - r15 */              \
 232   {0xffffffff,0x00000000},      /* GENERAL_REGS, r0 - r31 */            \
 233   {0xffffffff,0x00000003}       /* ALL_REGS */                          \
 234 }
 235
 236 #define REGNO_REG_CLASS(R) avr_regno_reg_class(R)
 237
 238 #define BASE_REG_CLASS (reload_completed ? BASE_POINTER_REGS : POINTER_REGS)
 239
 240 #define INDEX_REG_CLASS NO_REGS
 241
 242 #define REGNO_OK_FOR_BASE_P(r) (((r) < FIRST_PSEUDO_REGISTER            \
 243                                  && ((r) == REG_X                       \
 244                                      || (r) == REG_Y                    \
 245                                      || (r) == REG_Z                    \
 246                                      || (r) == ARG_POINTER_REGNUM))     \
 247                                 || (reg_renumber                        \
 248                                     && (reg_renumber[r] == REG_X        \
 249                                         || reg_renumber[r] == REG_Y     \
 250                                         || reg_renumber[r] == REG_Z     \
 251                                         || (reg_renumber[r]             \
 252                                             == ARG_POINTER_REGNUM))))
 253
 254 #define REGNO_OK_FOR_INDEX_P(NUM) 0
 255
 256 #define PREFERRED_RELOAD_CLASS(X, CLASS) preferred_reload_class(X,CLASS)
 257
 258 #define SMALL_REGISTER_CLASSES 1
 259
 260 #define CLASS_LIKELY_SPILLED_P(c) class_likely_spilled_p(c)
 261
 262 #define CLASS_MAX_NREGS(CLASS, MODE)   class_max_nregs (CLASS, MODE)
 263
 264 #define STACK_PUSH_CODE POST_DEC
 265
 266 #define STACK_GROWS_DOWNWARD
 267
 268 #define STARTING_FRAME_OFFSET 1
 269
 270 #define STACK_POINTER_OFFSET 1
 271
 272 #define FIRST_PARM_OFFSET(FUNDECL) 0
 273
 274 #define STACK_BOUNDARY 8
 275
 276 #define STACK_POINTER_REGNUM 32
 277
 278 #define FRAME_POINTER_REGNUM REG_Y
 279
 280 #define ARG_POINTER_REGNUM 34
 281
 282 #define STATIC_CHAIN_REGNUM 2
 283
 284 #define FRAME_POINTER_REQUIRED frame_pointer_required_p()
 285
 286 /* Offset from the frame pointer register value to the top of the stack.  */
 287 #define FRAME_POINTER_CFA_OFFSET(FNDECL) 0
 288
 289 #define ELIMINABLE_REGS {                                       \
 290       {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},               \
 291         {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}            \
 292        ,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}}
 293
 294 #define CAN_ELIMINATE(FROM, TO) (((FROM) == ARG_POINTER_REGNUM             \
 295                                   && (TO) == FRAME_POINTER_REGNUM)         \
 296                                  || (((FROM) == FRAME_POINTER_REGNUM       \
 297                                       || (FROM) == FRAME_POINTER_REGNUM+1) \
 298                                      && ! FRAME_POINTER_REQUIRED           \
 299                                      ))
 300
 301 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                    \
 302      OFFSET = initial_elimination_offset (FROM, TO)
 303
 304 #define RETURN_ADDR_RTX(count, x) \
 305   gen_rtx_MEM (Pmode, memory_address (Pmode, plus_constant (tem, 1)))
 306
 307 #define PUSH_ROUNDING(NPUSHED) (NPUSHED)
 308
 309 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
 310
 311 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) (function_arg (&(CUM), MODE, TYPE, NAMED))
 312
 313 typedef struct avr_args {
 314   int nregs;                    /* # registers available for passing */
 315   int regno;                    /* next available register number */
 316 } CUMULATIVE_ARGS;
 317
 318 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
 319   init_cumulative_args (&(CUM), FNTYPE, LIBNAME, FNDECL)
 320
 321 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)    \
 322   (function_arg_advance (&CUM, MODE, TYPE, NAMED))
 323
 324 #define FUNCTION_ARG_REGNO_P(r) function_arg_regno_p(r)
 325
 326 extern int avr_reg_order[];
 327
 328 #define RET_REGISTER avr_ret_register ()
 329
 330 #define FUNCTION_VALUE(VALTYPE, FUNC) avr_function_value (VALTYPE, FUNC)
 331
 332 #define LIBCALL_VALUE(MODE)  avr_libcall_value (MODE)
 333
 334 #define FUNCTION_VALUE_REGNO_P(N) ((int) (N) == RET_REGISTER)
 335
 336 #define DEFAULT_PCC_STRUCT_RETURN 0
 337
 338 #define EPILOGUE_USES(REGNO) 0
 339
 340 #define HAVE_POST_INCREMENT 1
 341 #define HAVE_PRE_DECREMENT 1
 342
 343 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
 344
 345 #define MAX_REGS_PER_ADDRESS 1
 346
 347 #ifdef REG_OK_STRICT
 348 #  define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
 349 {                                                       \
 350   if (legitimate_address_p (mode, operand, 1))          \
 351     goto ADDR;                                          \
 352 }
 353 #  else
 354 #  define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
 355 {                                                       \
 356   if (legitimate_address_p (mode, operand, 0))          \
 357     goto ADDR;                                          \
 358 }
 359 #endif
 360
 361 #define REG_OK_FOR_BASE_NOSTRICT_P(X) \
 362   (REGNO (X) >= FIRST_PSEUDO_REGISTER || REG_OK_FOR_BASE_STRICT_P(X))
 363
 364 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
 365
 366 #ifdef REG_OK_STRICT
 367 #  define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P (X)
 368 #else
 369 #  define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NOSTRICT_P (X)
 370 #endif
 371
 372 #define REG_OK_FOR_INDEX_P(X) 0
 373
 374 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)                          \
 375 {                                                                       \
 376   (X) = legitimize_address (X, OLDX, MODE);                             \
 377   if (memory_address_p (MODE, X))                                       \
 378     goto WIN;                                                           \
 379 }
 380
 381 #define XEXP_(X,Y) (X)
 382 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN)    \
 383 do {                                                                        \
 384   if (1&&(GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC))     \
 385     {                                                                       \
 386       push_reload (XEXP (X,0), XEXP (X,0), &XEXP (X,0), &XEXP (X,0),        \
 387                    POINTER_REGS, GET_MODE (X),GET_MODE (X) , 0, 0,          \
 388                    OPNUM, RELOAD_OTHER);                                    \
 389       goto WIN;                                                             \
 390     }                                                                       \
 391   if (GET_CODE (X) == PLUS                                                  \
 392       && REG_P (XEXP (X, 0))                                                \
 393       && GET_CODE (XEXP (X, 1)) == CONST_INT                                \
 394       && INTVAL (XEXP (X, 1)) >= 1)                                         \
 395     {                                                                       \
 396       int fit = INTVAL (XEXP (X, 1)) <= (64 - GET_MODE_SIZE (MODE));        \
 397       if (fit)                                                              \
 398         {                                                                   \
 399           if (reg_equiv_address[REGNO (XEXP (X, 0))] != 0)                  \
 400             {                                                               \
 401               int regno = REGNO (XEXP (X, 0));                              \
 402               rtx mem = make_memloc (X, regno);                             \
 403               push_reload (XEXP (mem,0), NULL, &XEXP (mem,0), NULL,         \
 404                            POINTER_REGS, Pmode, VOIDmode, 0, 0,             \
 405                            1, ADDR_TYPE (TYPE));                            \
 406               push_reload (mem, NULL_RTX, &XEXP (X, 0), NULL,               \
 407                            BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
 408                            OPNUM, TYPE);                                    \
 409               goto WIN;                                                     \
 410             }                                                               \
 411           push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL,           \
 412                        BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0,     \
 413                        OPNUM, TYPE);                                        \
 414           goto WIN;                                                         \
 415         }                                                                   \
 416       else if (! (frame_pointer_needed && XEXP (X,0) == frame_pointer_rtx)) \
 417         {                                                                   \
 418           push_reload (X, NULL_RTX, &X, NULL,                               \
 419                        POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0,          \
 420                        OPNUM, TYPE);                                        \
 421           goto WIN;                                                         \
 422         }                                                                   \
 423     }                                                                       \
 424 } while(0)
 425
 426 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)
 427
 428 #define LEGITIMATE_CONSTANT_P(X) 1
 429
 430 #define REGISTER_MOVE_COST(MODE, FROM, TO) ((FROM) == STACK_REG ? 6 \
 431                                             : (TO) == STACK_REG ? 12 \
 432                                             : 2)
 433
 434 #define MEMORY_MOVE_COST(MODE,CLASS,IN) ((MODE)==QImode ? 2 :   \
 435                                          (MODE)==HImode ? 4 :   \
 436                                          (MODE)==SImode ? 8 :   \
 437                                          (MODE)==SFmode ? 8 : 16)
 438
 439 #define BRANCH_COST 0
 440
 441 #define SLOW_BYTE_ACCESS 0
 442
 443 #define NO_FUNCTION_CSE
 444
 445 #define TEXT_SECTION_ASM_OP "\t.text"
 446
 447 #define DATA_SECTION_ASM_OP "\t.data"
 448
 449 #define BSS_SECTION_ASM_OP "\t.section .bss"
 450
 451 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
 452    There are no shared libraries on this target, and these sections are
 453    placed in the read-only program memory, so they are not writable.  */
 454
 455 #undef CTORS_SECTION_ASM_OP
 456 #define CTORS_SECTION_ASM_OP "\t.section .ctors,\"a\",@progbits"
 457
 458 #undef DTORS_SECTION_ASM_OP
 459 #define DTORS_SECTION_ASM_OP "\t.section .dtors,\"a\",@progbits"
 460
 461 #define TARGET_ASM_CONSTRUCTOR avr_asm_out_ctor
 462
 463 #define TARGET_ASM_DESTRUCTOR avr_asm_out_dtor
 464
 465 #define JUMP_TABLES_IN_TEXT_SECTION 0
 466
 467 #define ASM_COMMENT_START " ; "
 468
 469 #define ASM_APP_ON "/* #APP */\n"
 470
 471 #define ASM_APP_OFF "/* #NOAPP */\n"
 472
 473 /* Switch into a generic section.  */
 474 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
 475 #define TARGET_ASM_INIT_SECTIONS avr_asm_init_sections
 476
 477 #define ASM_OUTPUT_ASCII(FILE, P, SIZE)  gas_output_ascii (FILE,P,SIZE)
 478
 479 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == '\n'                    \
 480                                           || ((C) == '$'))
 481
 482 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)                     \
 483 do {                                                                       \
 484      fputs ("\t.comm ", (STREAM));                                         \
 485      assemble_name ((STREAM), (NAME));                                     \
 486      fprintf ((STREAM), ",%lu,1\n", (unsigned long)(SIZE));                \
 487 } while (0)
 488
 489 #define ASM_OUTPUT_BSS(FILE, DECL, NAME, SIZE, ROUNDED)                 \
 490   asm_output_bss ((FILE), (DECL), (NAME), (SIZE), (ROUNDED))
 491
 492 #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED)                   \
 493 do {                                                                    \
 494      fputs ("\t.lcomm ", (STREAM));                                     \
 495      assemble_name ((STREAM), (NAME));                                  \
 496      fprintf ((STREAM), ",%d\n", (int)(SIZE));                          \
 497 } while (0)
 498
 499 #undef TYPE_ASM_OP
 500 #undef SIZE_ASM_OP
 501 #undef WEAK_ASM_OP
 502 #define TYPE_ASM_OP     "\t.type\t"
 503 #define SIZE_ASM_OP     "\t.size\t"
 504 #define WEAK_ASM_OP     "\t.weak\t"
 505 /* Define the strings used for the special svr4 .type and .size directives.
 506    These strings generally do not vary from one system running svr4 to
 507    another, but if a given system (e.g. m88k running svr) needs to use
 508    different pseudo-op names for these, they may be overridden in the
 509    file which includes this one.  */
 510
 511
 512 #undef TYPE_OPERAND_FMT
 513 #define TYPE_OPERAND_FMT        "@%s"
 514 /* The following macro defines the format used to output the second
 515    operand of the .type assembler directive.  Different svr4 assemblers
 516    expect various different forms for this operand.  The one given here
 517    is just a default.  You may need to override it in your machine-
 518    specific tm.h file (depending upon the particulars of your assembler).  */
 519
 520 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 521 do {                                                            \
 522      ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");        \
 523      ASM_OUTPUT_LABEL (FILE, NAME);                             \
 524 } while (0)
 525
 526 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)                    \
 527   do {                                                                  \
 528     if (!flag_inhibit_size_directive)                                   \
 529       ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                           \
 530   } while (0)
 531
 532 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 533 do {                                                                    \
 534   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");                     \
 535   size_directive_output = 0;                                            \
 536   if (!flag_inhibit_size_directive && DECL_SIZE (DECL))                 \
 537     {                                                                   \
 538       size_directive_output = 1;                                        \
 539       ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME,                            \
 540                                  int_size_in_bytes (TREE_TYPE (DECL))); \
 541     }                                                                   \
 542   ASM_OUTPUT_LABEL(FILE, NAME);                                         \
 543 } while (0)
 544
 545 #undef ASM_FINISH_DECLARE_OBJECT
 546 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)         \
 547 do {                                                                     \
 548      const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);             \
 549      HOST_WIDE_INT size;                                                 \
 550      if (!flag_inhibit_size_directive && DECL_SIZE (DECL)                \
 551          && ! AT_END && TOP_LEVEL                                        \
 552          && DECL_INITIAL (DECL) == error_mark_node                       \
 553          && !size_directive_output)                                      \
 554        {                                                                 \
 555          size_directive_output = 1;                                      \
 556          size = int_size_in_bytes (TREE_TYPE (DECL));                    \
 557          ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size);                   \
 558        }                                                                 \
 559    } while (0)
 560
 561
 562 #define ESCAPES \
 563 "\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\
 564 \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\
 565 \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\
 566 \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\
 567 \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\
 568 \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\
 569 \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\
 570 \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"
 571 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
 572    ASM_OUTPUT_LIMITED_STRING macros.  Each byte in the table
 573    corresponds to a particular byte value [0..255].  For any
 574    given byte value, if the value in the corresponding table
 575    position is zero, the given character can be output directly.
 576    If the table value is 1, the byte must be output as a \ooo
 577    octal escape.  If the tables value is anything else, then the
 578    byte value should be output as a \ followed by the value
 579    in the table.  Note that we can use standard UN*X escape
 580    sequences for many control characters, but we don't use
 581    \a to represent BEL because some svr4 assemblers (e.g. on
 582    the i386) don't know about that.  Also, we don't use \v
 583    since some versions of gas, such as 2.2 did not accept it.  */
 584
 585 #define STRING_LIMIT    ((unsigned) 64)
 586 #define STRING_ASM_OP   "\t.string\t"
 587 /* Some svr4 assemblers have a limit on the number of characters which
 588    can appear in the operand of a .string directive.  If your assembler
 589    has such a limitation, you should define STRING_LIMIT to reflect that
 590    limit.  Note that at least some svr4 assemblers have a limit on the
 591    actual number of bytes in the double-quoted string, and that they
 592    count each character in an escape sequence as one byte.  Thus, an
 593    escape sequence like \377 would count as four bytes.
 594
 595    If your target assembler doesn't support the .string directive, you
 596    should define this to zero.  */
 597
 598 /* Globalizing directive for a label.  */
 599 #define GLOBAL_ASM_OP ".global\t"
 600
 601 #define SET_ASM_OP      "\t.set\t"
 602
 603 #define ASM_WEAKEN_LABEL(FILE, NAME)    \
 604   do                                    \
 605     {                                   \
 606       fputs ("\t.weak\t", (FILE));      \
 607       assemble_name ((FILE), (NAME));   \
 608       fputc ('\n', (FILE));             \
 609     }                                   \
 610   while (0)
 611
 612 #define SUPPORTS_WEAK 1
 613
 614 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)        \
 615 sprintf (STRING, "*.%s%lu", PREFIX, (unsigned long)(NUM))
 616
 617 #define HAS_INIT_SECTION 1
 618
 619 #define REGISTER_NAMES {                                \
 620   "r0","r1","r2","r3","r4","r5","r6","r7",              \
 621     "r8","r9","r10","r11","r12","r13","r14","r15",      \
 622     "r16","r17","r18","r19","r20","r21","r22","r23",    \
 623     "r24","r25","r26","r27","r28","r29","r30","r31",    \
 624     "__SPL__","__SPH__","argL","argH"}
 625
 626 #define FINAL_PRESCAN_INSN(insn, operand, nop) final_prescan_insn (insn, operand,nop)
 627
 628 #define PRINT_OPERAND(STREAM, X, CODE) print_operand (STREAM, X, CODE)
 629
 630 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '~')
 631
 632 #define PRINT_OPERAND_ADDRESS(STREAM, X) print_operand_address(STREAM, X)
 633
 634 #define USER_LABEL_PREFIX ""
 635
 636 #define ASSEMBLER_DIALECT AVR_HAVE_MOVW
 637
 638 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO)      \
 639 {                                               \
 640   gcc_assert (REGNO < 32);                      \
 641   fprintf (STREAM, "\tpush\tr%d", REGNO);       \
 642 }
 643
 644 #define ASM_OUTPUT_REG_POP(STREAM, REGNO)       \
 645 {                                               \
 646   gcc_assert (REGNO < 32);                      \
 647   fprintf (STREAM, "\tpop\tr%d", REGNO);        \
 648 }
 649
 650 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)          \
 651   avr_output_addr_vec_elt(STREAM, VALUE)
 652
 653 #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) \
 654   (switch_to_section (progmem_section), \
 655    (*targetm.asm_out.internal_label) (STREAM, PREFIX, NUM))
 656
 657 #define ASM_OUTPUT_SKIP(STREAM, N)              \
 658 fprintf (STREAM, "\t.skip %lu,0\n", (unsigned long)(N))
 659
 660 #define ASM_OUTPUT_ALIGN(STREAM, POWER)
 661
 662 #define CASE_VECTOR_MODE HImode
 663
 664 extern int avr_case_values_threshold;
 665
 666 #define CASE_VALUES_THRESHOLD avr_case_values_threshold
 667
 668 #undef WORD_REGISTER_OPERATIONS
 669
 670 #define MOVE_MAX 4
 671
 672 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
 673
 674 #define Pmode HImode
 675
 676 #define FUNCTION_MODE HImode
 677
 678 #define DOLLARS_IN_IDENTIFIERS 0
 679
 680 #define NO_DOLLAR_IN_LABEL 1
 681
 682 #define TRAMPOLINE_TEMPLATE(FILE) \
 683   internal_error ("trampolines not supported")
 684
 685 #define TRAMPOLINE_SIZE 4
 686
 687 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)                             \
 688 {                                                                             \
 689   emit_move_insn (gen_rtx_MEM (HImode, plus_constant ((TRAMP), 2)), CXT);    \
 690   emit_move_insn (gen_rtx_MEM (HImode, plus_constant ((TRAMP), 6)), FNADDR); \
 691 }
 692 /* Store in cc_status the expressions
 693    that the condition codes will describe
 694    after execution of an instruction whose pattern is EXP.
 695    Do not alter them if the instruction would not alter the cc's.  */
 696
 697 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
 698
 699 /* The add insns don't set overflow in a usable way.  */
 700 #define CC_OVERFLOW_UNUSABLE 01000
 701 /* The mov,and,or,xor insns don't set carry.  That's ok though as the
 702    Z bit is all we need when doing unsigned comparisons on the result of
 703    these insns (since they're always with 0).  However, conditions.h has
 704    CC_NO_OVERFLOW defined for this purpose.  Rename it to something more
 705    understandable.  */
 706 #define CC_NO_CARRY CC_NO_OVERFLOW
 707
 708
 709 /* Output assembler code to FILE to increment profiler label # LABELNO
 710    for profiling a function entry.  */
 711
 712 #define FUNCTION_PROFILER(FILE, LABELNO)  \
 713   fprintf (FILE, "/* profiler %d */", (LABELNO))
 714
 715 #define ADJUST_INSN_LENGTH(INSN, LENGTH) (LENGTH =\
 716                                           adjust_insn_length (INSN, LENGTH))
 717
 718 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE}"
 719
 720 #define CC1_SPEC "%{profile:-p}"
 721
 722 #define CC1PLUS_SPEC "%{!frtti:-fno-rtti} \
 723     %{!fenforce-eh-specs:-fno-enforce-eh-specs} \
 724     %{!fexceptions:-fno-exceptions}"
 725 /* A C string constant that tells the GCC drvier program options to
 726    pass to `cc1plus'.  */
 727
 728 #define ASM_SPEC "%{mmcu=avr25:-mmcu=avr2;\
 729 mmcu=*:-mmcu=%*}"
 730
 731 #define LINK_SPEC " %{!mmcu*:-m avr2}\
 732 %{mmcu=at90s1200|\
 733   mmcu=attiny11|\
 734   mmcu=attiny12|\
 735   mmcu=attiny15|\
 736   mmcu=attiny28:-m avr1}\
 737 %{mmcu=attiny22|\
 738   mmcu=attiny26|\
 739   mmcu=at90s2*|\
 740   mmcu=at90s4*|\
 741   mmcu=at90s8*|\
 742   mmcu=at90c8*|\
 743   mmcu=at86rf401|\
 744   mmcu=attiny13|\
 745   mmcu=attiny2313|\
 746   mmcu=attiny24|\
 747   mmcu=attiny25|\
 748   mmcu=attiny261|\
 749   mmcu=attiny4*|\
 750   mmcu=attiny8*:-m avr2}\
 751 %{mmcu=atmega103|\
 752   mmcu=atmega603|\
 753   mmcu=at43*|\
 754   mmcu=at76*:-m avr3}\
 755 %{mmcu=atmega8*|\
 756   mmcu=atmega48|\
 757   mmcu=at90pwm1|\
 758   mmcu=at90pwm2|\
 759   mmcu=at90pwm3:-m avr4}\
 760 %{mmcu=atmega16*|\
 761   mmcu=atmega32*|\
 762   mmcu=atmega406|\
 763   mmcu=atmega64*|\
 764   mmcu=atmega128*|\
 765   mmcu=at90can*|\
 766   mmcu=at90usb*|\
 767   mmcu=at94k:-m avr5}\
 768 %{mmcu=atmega324*|\
 769   mmcu=atmega325|\
 770   mmcu=atmega3250|\
 771   mmcu=atmega329|\
 772   mmcu=atmega3290|\
 773   mmcu=atmega406|\
 774   mmcu=atmega48|\
 775   mmcu=atmega88|\
 776   mmcu=atmega64|\
 777   mmcu=atmega644*|\
 778   mmcu=atmega645|\
 779   mmcu=atmega6450|\
 780   mmcu=atmega649|\
 781   mmcu=atmega6490|\
 782   mmcu=atmega128|\
 783   mmcu=atmega162|\
 784   mmcu=atmega164*|\
 785   mmcu=atmega165*|\
 786   mmcu=atmega168|\
 787   mmcu=atmega169*|\
 788   mmcu=at90can*|\
 789   mmcu=at90pwm*|\
 790   mmcu=at90usb*: -Tdata 0x800100}\
 791 %{mmcu=atmega640|\
 792   mmcu=atmega1280|\
 793   mmcu=atmega1281: -Tdata 0x800200} "
 794
 795 #define LIB_SPEC \
 796   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lc }}}}}"
 797
 798 #define LIBSTDCXX "-lgcc"
 799 /* No libstdc++ for now.  Empty string doesn't work.  */
 800
 801 #define LIBGCC_SPEC \
 802   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lgcc }}}}}"
 803
 804 #define STARTFILE_SPEC "%(crt_binutils)"
 805
 806 #define ENDFILE_SPEC ""
 807
 808 #define CRT_BINUTILS_SPECS "\
 809 %{mmcu=at90s1200|mmcu=avr1:crts1200.o%s} \
 810 %{mmcu=attiny11:crttn11.o%s} \
 811 %{mmcu=attiny12:crttn12.o%s} \
 812 %{mmcu=attiny15:crttn15.o%s} \
 813 %{mmcu=attiny28:crttn28.o%s} \
 814 %{!mmcu*|mmcu=at90s8515|mmcu=avr2:crts8515.o%s} \
 815 %{mmcu=at90s2313:crts2313.o%s} \
 816 %{mmcu=at90s2323:crts2323.o%s} \
 817 %{mmcu=at90s2333:crts2333.o%s} \
 818 %{mmcu=at90s2343:crts2343.o%s} \
 819 %{mmcu=attiny22:crttn22.o%s} \
 820 %{mmcu=attiny26:crttn26.o%s} \
 821 %{mmcu=at90s4433:crts4433.o%s} \
 822 %{mmcu=at90s4414:crts4414.o%s} \
 823 %{mmcu=at90s4434:crts4434.o%s} \
 824 %{mmcu=at90c8534:crtc8534.o%s} \
 825 %{mmcu=at90s8535:crts8535.o%s} \
 826 %{mmcu=at86rf401:crt86401.o%s} \
 827 %{mmcu=attiny13:crttn13.o%s} \
 828 %{mmcu=attiny2313|mmcu=avr25:crttn2313.o%s} \
 829 %{mmcu=attiny24:crttn24.o%s} \
 830 %{mmcu=attiny44:crttn44.o%s} \
 831 %{mmcu=attiny84:crttn84.o%s} \
 832 %{mmcu=attiny25:crttn25.o%s} \
 833 %{mmcu=attiny45:crttn45.o%s} \
 834 %{mmcu=attiny85:crttn85.o%s} \
 835 %{mmcu=attiny261:crttn261.o%s} \
 836 %{mmcu=attiny461:crttn461.o%s} \
 837 %{mmcu=attiny861:crttn861.o%s} \
 838 %{mmcu=atmega103|mmcu=avr3:crtm103.o%s} \
 839 %{mmcu=atmega603:crtm603.o%s} \
 840 %{mmcu=at43usb320:crt43320.o%s} \
 841 %{mmcu=at43usb355:crt43355.o%s} \
 842 %{mmcu=at76c711:crt76711.o%s} \
 843 %{mmcu=atmega8|mmcu=avr4:crtm8.o%s} \
 844 %{mmcu=atmega48:crtm48.o%s} \
 845 %{mmcu=atmega88:crtm88.o%s} \
 846 %{mmcu=atmega8515:crtm8515.o%s} \
 847 %{mmcu=atmega8535:crtm8535.o%s} \
 848 %{mmcu=at90pwm1:crt90pwm1.o%s} \
 849 %{mmcu=at90pwm2:crt90pwm2.o%s} \
 850 %{mmcu=at90pwm3:crt90pwm3.o%s} \
 851 %{mmcu=atmega16:crtm16.o%s} \
 852 %{mmcu=atmega161|mmcu=avr5:crtm161.o%s} \
 853 %{mmcu=atmega162:crtm162.o%s} \
 854 %{mmcu=atmega163:crtm163.o%s} \
 855 %{mmcu=atmega164p:crtm164p.o%s} \
 856 %{mmcu=atmega165:crtm165.o%s} \
 857 %{mmcu=atmega165p:crtm165p.o%s} \
 858 %{mmcu=atmega168:crtm168.o%s} \
 859 %{mmcu=atmega169:crtm169.o%s} \
 860 %{mmcu=atmega169p:crtm169p.o%s} \
 861 %{mmcu=atmega32:crtm32.o%s} \
 862 %{mmcu=atmega323:crtm323.o%s} \
 863 %{mmcu=atmega324p:crtm324p.o%s} \
 864 %{mmcu=atmega325:crtm325.o%s} \
 865 %{mmcu=atmega3250:crtm3250.o%s} \
 866 %{mmcu=atmega329:crtm329.o%s} \
 867 %{mmcu=atmega3290:crtm3290.o%s} \
 868 %{mmcu=atmega406:crtm406.o%s} \
 869 %{mmcu=atmega64:crtm64.o%s} \
 870 %{mmcu=atmega640:crtm640.o%s} \
 871 %{mmcu=atmega644:crtm644.o%s} \
 872 %{mmcu=atmega644p:crtm644p.o%s} \
 873 %{mmcu=atmega645:crtm645.o%s} \
 874 %{mmcu=atmega6450:crtm6450.o%s} \
 875 %{mmcu=atmega649:crtm649.o%s} \
 876 %{mmcu=atmega6490:crtm6490.o%s} \
 877 %{mmcu=atmega128:crtm128.o%s} \
 878 %{mmcu=atmega1280:crtm1280.o%s} \
 879 %{mmcu=atmega1281:crtm1281.o%s} \
 880 %{mmcu=at90can32:crtcan32.o%s} \
 881 %{mmcu=at90can64:crtcan64.o%s} \
 882 %{mmcu=at90can128:crtcan128.o%s} \
 883 %{mmcu=at90usb646:crtusb646.o%s} \
 884 %{mmcu=at90usb647:crtusb647.o%s} \
 885 %{mmcu=at90usb1286:crtusb1286.o%s} \
 886 %{mmcu=at90usb1287:crtusb1287.o%s} \
 887 %{mmcu=at94k:crtat94k.o%s}"
 888
 889 #define EXTRA_SPECS {"crt_binutils", CRT_BINUTILS_SPECS},
 890
 891 /* This is the default without any -mmcu=* option (AT90S*).  */
 892 #define MULTILIB_DEFAULTS { "mmcu=avr2" }
 893
 894 /* This is undefined macro for collect2 disabling */
 895 #define LINKER_NAME "ld"
 896
 897 #define TEST_HARD_REG_CLASS(CLASS, REGNO) \
 898   TEST_HARD_REG_BIT (reg_class_contents[ (int) (CLASS)], REGNO)
 899
 900 /* Note that the other files fail to use these
 901    in some of the places where they should.  */
 902
 903 #if defined(__STDC__) || defined(ALMOST_STDC)
 904 #define AS2(a,b,c) #a " " #b "," #c
 905 #define AS2C(b,c) " " #b "," #c
 906 #define AS3(a,b,c,d) #a " " #b "," #c "," #d
 907 #define AS1(a,b) #a " " #b
 908 #else
 909 #define AS1(a,b) "a     b"
 910 #define AS2(a,b,c) "a   b,c"
 911 #define AS2C(b,c) " b,c"
 912 #define AS3(a,b,c,d) "a b,c,d"
 913 #endif
 914 #define OUT_AS1(a,b) output_asm_insn (AS1(a,b), operands)
 915 #define OUT_AS2(a,b,c) output_asm_insn (AS2(a,b,c), operands)
 916 #define CR_TAB "\n\t"
 917
 918 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 919
 920 #define DWARF2_DEBUGGING_INFO 1
 921
 922 #define OBJECT_FORMAT_ELF