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    2008, 2009, 2010
   5    Free Software Foundation, Inc.
   6    Contributed by Denis Chertykov (chertykov@gmail.com)
   7
   8 This file is part of GCC.
   9
  10 GCC is free software; you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation; either version 3, or (at your option)
  13 any later version.
  14
  15 GCC is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with GCC; see the file COPYING3.  If not see
  22 <http://www.gnu.org/licenses/>.  */
  23
  24 /* Names to predefine in the preprocessor for this target machine.  */
  25
  26 struct base_arch_s {
  27   /* Assembler only.  */
  28   int asm_only;
  29
  30   /* Core have 'MUL*' instructions.  */
  31   int have_mul;
  32
  33   /* Core have 'CALL' and 'JMP' instructions.  */
  34   int have_jmp_call;
  35
  36   /* Core have 'MOVW' and 'LPM Rx,Z' instructions.  */
  37   int have_movw_lpmx;
  38
  39   /* Core have 'ELPM' instructions.  */
  40   int have_elpm;
  41
  42   /* Core have 'ELPM Rx,Z' instructions.  */
  43   int have_elpmx;
  44
  45   /* Core have 'EICALL' and 'EIJMP' instructions.  */
  46   int have_eijmp_eicall;
  47
  48   /* Reserved for xmega architecture.  */
  49   int reserved;
  50
  51   /* Reserved for xmega architecture.  */
  52   int reserved2;
  53
  54   /* Default start of data section address for architecture.  */
  55   int default_data_section_start;
  56
  57   const char *const macro;
  58
  59   /* Architecture name.  */
  60   const char *const arch_name;
  61 };
  62
  63 /* These names are used as the index into the avr_arch_types[] table
  64    above.  */
  65
  66 enum avr_arch
  67 {
  68   ARCH_UNKNOWN,
  69   ARCH_AVR1,
  70   ARCH_AVR2,
  71   ARCH_AVR25,
  72   ARCH_AVR3,
  73   ARCH_AVR31,
  74   ARCH_AVR35,
  75   ARCH_AVR4,
  76   ARCH_AVR5,
  77   ARCH_AVR51,
  78   ARCH_AVR6
  79 };
  80
  81 struct mcu_type_s {
  82   /* Device name.  */
  83   const char *const name;
  84
  85   /* Index in avr_arch_types[].  */
  86   int arch;
  87
  88   /* Must lie outside user's namespace.  NULL == no macro.  */
  89   const char *const macro;
  90
  91   /* Stack pointer have 8 bits width.  */
  92   int short_sp;
  93
  94   /* Start of data section.  */
  95   int data_section_start;
  96
  97   /* Name of device library.  */
  98   const char *const library_name;
  99 };
 100
 101 /* Preprocessor macros to define depending on MCU type.  */
 102 extern const char *avr_extra_arch_macro;
 103 extern const struct base_arch_s *avr_current_arch;
 104 extern const struct mcu_type_s *avr_current_device;
 105 extern const struct mcu_type_s avr_mcu_types[];
 106 extern const struct base_arch_s avr_arch_types[];
 107
 108 #define TARGET_CPU_CPP_BUILTINS()       avr_cpu_cpp_builtins (pfile)
 109
 110 #if !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS)
 111 extern GTY(()) section *progmem_section;
 112 #endif
 113
 114 #define AVR_HAVE_JMP_CALL (avr_current_arch->have_jmp_call && !TARGET_SHORT_CALLS)
 115 #define AVR_HAVE_MUL (avr_current_arch->have_mul)
 116 #define AVR_HAVE_MOVW (avr_current_arch->have_movw_lpmx)
 117 #define AVR_HAVE_LPMX (avr_current_arch->have_movw_lpmx)
 118 #define AVR_HAVE_RAMPZ (avr_current_arch->have_elpm)
 119 #define AVR_HAVE_EIJMP_EICALL (avr_current_arch->have_eijmp_eicall)
 120 #define AVR_HAVE_8BIT_SP (avr_current_device->short_sp || TARGET_TINY_STACK)
 121
 122 #define AVR_2_BYTE_PC (!AVR_HAVE_EIJMP_EICALL)
 123 #define AVR_3_BYTE_PC (AVR_HAVE_EIJMP_EICALL)
 124
 125 #define TARGET_VERSION fprintf (stderr, " (GNU assembler syntax)");
 126
 127 #define OVERRIDE_OPTIONS avr_override_options ()
 128
 129 #define CAN_DEBUG_WITHOUT_FP
 130
 131 #define BITS_BIG_ENDIAN 0
 132 #define BYTES_BIG_ENDIAN 0
 133 #define WORDS_BIG_ENDIAN 0
 134
 135 #ifdef IN_LIBGCC2
 136 /* This is to get correct SI and DI modes in libgcc2.c (32 and 64 bits).  */
 137 #define UNITS_PER_WORD 4
 138 #else
 139 /* Width of a word, in units (bytes).  */
 140 #define UNITS_PER_WORD 1
 141 #endif
 142
 143 #define POINTER_SIZE 16
 144
 145
 146 /* Maximum sized of reasonable data type
 147    DImode or Dfmode ...  */
 148 #define MAX_FIXED_MODE_SIZE 32
 149
 150 #define PARM_BOUNDARY 8
 151
 152 #define FUNCTION_BOUNDARY 8
 153
 154 #define EMPTY_FIELD_BOUNDARY 8
 155
 156 /* No data type wants to be aligned rounder than this.  */
 157 #define BIGGEST_ALIGNMENT 8
 158
 159 #define MAX_OFILE_ALIGNMENT (32768 * 8)
 160
 161 #define TARGET_VTABLE_ENTRY_ALIGN 8
 162
 163 #define STRICT_ALIGNMENT 0
 164
 165 #define INT_TYPE_SIZE (TARGET_INT8 ? 8 : 16)
 166 #define SHORT_TYPE_SIZE (INT_TYPE_SIZE == 8 ? INT_TYPE_SIZE : 16)
 167 #define LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 16 : 32)
 168 #define LONG_LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 32 : 64)
 169 #define FLOAT_TYPE_SIZE 32
 170 #define DOUBLE_TYPE_SIZE 32
 171 #define LONG_DOUBLE_TYPE_SIZE 32
 172
 173 #define DEFAULT_SIGNED_CHAR 1
 174
 175 #define SIZE_TYPE (INT_TYPE_SIZE == 8 ? "long unsigned int" : "unsigned int")
 176 #define PTRDIFF_TYPE (INT_TYPE_SIZE == 8 ? "long int" :"int")
 177
 178 #define WCHAR_TYPE_SIZE 16
 179
 180 #define FIRST_PSEUDO_REGISTER 36
 181
 182 #define FIXED_REGISTERS {\
 183   1,1,/* r0 r1 */\
 184   0,0,/* r2 r3 */\
 185   0,0,/* r4 r5 */\
 186   0,0,/* r6 r7 */\
 187   0,0,/* r8 r9 */\
 188   0,0,/* r10 r11 */\
 189   0,0,/* r12 r13 */\
 190   0,0,/* r14 r15 */\
 191   0,0,/* r16 r17 */\
 192   0,0,/* r18 r19 */\
 193   0,0,/* r20 r21 */\
 194   0,0,/* r22 r23 */\
 195   0,0,/* r24 r25 */\
 196   0,0,/* r26 r27 */\
 197   0,0,/* r28 r29 */\
 198   0,0,/* r30 r31 */\
 199   1,1,/*  STACK */\
 200   1,1 /* arg pointer */  }
 201
 202 #define CALL_USED_REGISTERS {                   \
 203   1,1,/* r0 r1 */                               \
 204     0,0,/* r2 r3 */                             \
 205     0,0,/* r4 r5 */                             \
 206     0,0,/* r6 r7 */                             \
 207     0,0,/* r8 r9 */                             \
 208     0,0,/* r10 r11 */                           \
 209     0,0,/* r12 r13 */                           \
 210     0,0,/* r14 r15 */                           \
 211     0,0,/* r16 r17 */                           \
 212     1,1,/* r18 r19 */                           \
 213     1,1,/* r20 r21 */                           \
 214     1,1,/* r22 r23 */                           \
 215     1,1,/* r24 r25 */                           \
 216     1,1,/* r26 r27 */                           \
 217     0,0,/* r28 r29 */                           \
 218     1,1,/* r30 r31 */                           \
 219     1,1,/*  STACK */                            \
 220     1,1 /* arg pointer */  }
 221
 222 #define REG_ALLOC_ORDER {                       \
 223     24,25,                                      \
 224     18,19,                                      \
 225     20,21,                                      \
 226     22,23,                                      \
 227     30,31,                                      \
 228     26,27,                                      \
 229     28,29,                                      \
 230     17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,    \
 231     0,1,                                        \
 232     32,33,34,35                                 \
 233     }
 234
 235 #define ADJUST_REG_ALLOC_ORDER order_regs_for_local_alloc ()
 236
 237
 238 #define HARD_REGNO_NREGS(REGNO, MODE) ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
 239
 240 #define HARD_REGNO_MODE_OK(REGNO, MODE) avr_hard_regno_mode_ok(REGNO, MODE)
 241
 242 #define MODES_TIEABLE_P(MODE1, MODE2) 1
 243
 244 enum reg_class {
 245   NO_REGS,
 246   R0_REG,                       /* r0 */
 247   POINTER_X_REGS,               /* r26 - r27 */
 248   POINTER_Y_REGS,               /* r28 - r29 */
 249   POINTER_Z_REGS,               /* r30 - r31 */
 250   STACK_REG,                    /* STACK */
 251   BASE_POINTER_REGS,            /* r28 - r31 */
 252   POINTER_REGS,                 /* r26 - r31 */
 253   ADDW_REGS,                    /* r24 - r31 */
 254   SIMPLE_LD_REGS,               /* r16 - r23 */
 255   LD_REGS,                      /* r16 - r31 */
 256   NO_LD_REGS,                   /* r0 - r15 */
 257   GENERAL_REGS,                 /* r0 - r31 */
 258   ALL_REGS, LIM_REG_CLASSES
 259 };
 260
 261
 262 #define N_REG_CLASSES (int)LIM_REG_CLASSES
 263
 264 #define REG_CLASS_NAMES {                                       \
 265                  "NO_REGS",                                     \
 266                    "R0_REG",    /* r0 */                        \
 267                    "POINTER_X_REGS", /* r26 - r27 */            \
 268                    "POINTER_Y_REGS", /* r28 - r29 */            \
 269                    "POINTER_Z_REGS", /* r30 - r31 */            \
 270                    "STACK_REG", /* STACK */                     \
 271                    "BASE_POINTER_REGS", /* r28 - r31 */         \
 272                    "POINTER_REGS", /* r26 - r31 */              \
 273                    "ADDW_REGS", /* r24 - r31 */                 \
 274                    "SIMPLE_LD_REGS", /* r16 - r23 */            \
 275                    "LD_REGS",   /* r16 - r31 */                 \
 276                    "NO_LD_REGS", /* r0 - r15 */                 \
 277                    "GENERAL_REGS", /* r0 - r31 */               \
 278                    "ALL_REGS" }
 279
 280 #define REG_CLASS_CONTENTS {                                            \
 281   {0x00000000,0x00000000},      /* NO_REGS */                           \
 282   {0x00000001,0x00000000},      /* R0_REG */                            \
 283   {3 << REG_X,0x00000000},      /* POINTER_X_REGS, r26 - r27 */         \
 284   {3 << REG_Y,0x00000000},      /* POINTER_Y_REGS, r28 - r29 */         \
 285   {3 << REG_Z,0x00000000},      /* POINTER_Z_REGS, r30 - r31 */         \
 286   {0x00000000,0x00000003},      /* STACK_REG, STACK */                  \
 287   {(3 << REG_Y) | (3 << REG_Z),                                         \
 288      0x00000000},               /* BASE_POINTER_REGS, r28 - r31 */      \
 289   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z),                          \
 290      0x00000000},               /* POINTER_REGS, r26 - r31 */           \
 291   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z) | (3 << REG_W),           \
 292      0x00000000},               /* ADDW_REGS, r24 - r31 */              \
 293   {0x00ff0000,0x00000000},      /* SIMPLE_LD_REGS r16 - r23 */          \
 294   {(3 << REG_X)|(3 << REG_Y)|(3 << REG_Z)|(3 << REG_W)|(0xff << 16),    \
 295      0x00000000},       /* LD_REGS, r16 - r31 */                        \
 296   {0x0000ffff,0x00000000},      /* NO_LD_REGS  r0 - r15 */              \
 297   {0xffffffff,0x00000000},      /* GENERAL_REGS, r0 - r31 */            \
 298   {0xffffffff,0x00000003}       /* ALL_REGS */                          \
 299 }
 300
 301 #define REGNO_REG_CLASS(R) avr_regno_reg_class(R)
 302
 303 /* The following macro defines cover classes for Integrated Register
 304    Allocator.  Cover classes is a set of non-intersected register
 305    classes covering all hard registers used for register allocation
 306    purpose.  Any move between two registers of a cover class should be
 307    cheaper than load or store of the registers.  The macro value is
 308    array of register classes with LIM_REG_CLASSES used as the end
 309    marker.  */
 310
 311 #define IRA_COVER_CLASSES               \
 312 {                                       \
 313   GENERAL_REGS, LIM_REG_CLASSES         \
 314 }
 315
 316 #define BASE_REG_CLASS (reload_completed ? BASE_POINTER_REGS : POINTER_REGS)
 317
 318 #define INDEX_REG_CLASS NO_REGS
 319
 320 #define REGNO_OK_FOR_BASE_P(r) (((r) < FIRST_PSEUDO_REGISTER            \
 321                                  && ((r) == REG_X                       \
 322                                      || (r) == REG_Y                    \
 323                                      || (r) == REG_Z                    \
 324                                      || (r) == ARG_POINTER_REGNUM))     \
 325                                 || (reg_renumber                        \
 326                                     && (reg_renumber[r] == REG_X        \
 327                                         || reg_renumber[r] == REG_Y     \
 328                                         || reg_renumber[r] == REG_Z     \
 329                                         || (reg_renumber[r]             \
 330                                             == ARG_POINTER_REGNUM))))
 331
 332 #define REGNO_OK_FOR_INDEX_P(NUM) 0
 333
 334 #define PREFERRED_RELOAD_CLASS(X, CLASS) preferred_reload_class(X,CLASS)
 335
 336 #define TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P hook_bool_mode_true
 337
 338 #define CLASS_LIKELY_SPILLED_P(c) class_likely_spilled_p(c)
 339
 340 #define CLASS_MAX_NREGS(CLASS, MODE)   class_max_nregs (CLASS, MODE)
 341
 342 #define STACK_PUSH_CODE POST_DEC
 343
 344 #define STACK_GROWS_DOWNWARD
 345
 346 #define STARTING_FRAME_OFFSET 1
 347
 348 #define STACK_POINTER_OFFSET 1
 349
 350 #define FIRST_PARM_OFFSET(FUNDECL) 0
 351
 352 #define STACK_BOUNDARY 8
 353
 354 #define STACK_POINTER_REGNUM 32
 355
 356 #define FRAME_POINTER_REGNUM REG_Y
 357
 358 #define ARG_POINTER_REGNUM 34
 359
 360 #define STATIC_CHAIN_REGNUM 2
 361
 362 /* Offset from the frame pointer register value to the top of the stack.  */
 363 #define FRAME_POINTER_CFA_OFFSET(FNDECL) 0
 364
 365 #define ELIMINABLE_REGS {                                       \
 366       {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},               \
 367         {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}            \
 368        ,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}}
 369
 370 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                    \
 371   OFFSET = avr_initial_elimination_offset (FROM, TO)
 372
 373 #define RETURN_ADDR_RTX(count, tem) avr_return_addr_rtx (count, tem)
 374
 375 /* Don't use Push rounding. expr.c: emit_single_push_insn is broken
 376    for POST_DEC targets (PR27386).  */
 377 /*#define PUSH_ROUNDING(NPUSHED) (NPUSHED)*/
 378
 379 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) (function_arg (&(CUM), MODE, TYPE, NAMED))
 380
 381 typedef struct avr_args {
 382   int nregs;                    /* # registers available for passing */
 383   int regno;                    /* next available register number */
 384 } CUMULATIVE_ARGS;
 385
 386 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
 387   init_cumulative_args (&(CUM), FNTYPE, LIBNAME, FNDECL)
 388
 389 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)    \
 390   (function_arg_advance (&CUM, MODE, TYPE, NAMED))
 391
 392 #define FUNCTION_ARG_REGNO_P(r) function_arg_regno_p(r)
 393
 394 extern int avr_reg_order[];
 395
 396 #define RET_REGISTER avr_ret_register ()
 397
 398 #define LIBCALL_VALUE(MODE)  avr_libcall_value (MODE)
 399
 400 #define FUNCTION_VALUE_REGNO_P(N) ((int) (N) == RET_REGISTER)
 401
 402 #define DEFAULT_PCC_STRUCT_RETURN 0
 403
 404 #define EPILOGUE_USES(REGNO) avr_epilogue_uses(REGNO)
 405
 406 #define HAVE_POST_INCREMENT 1
 407 #define HAVE_PRE_DECREMENT 1
 408
 409 #define MAX_REGS_PER_ADDRESS 1
 410
 411 #define REG_OK_FOR_BASE_NOSTRICT_P(X) \
 412   (REGNO (X) >= FIRST_PSEUDO_REGISTER || REG_OK_FOR_BASE_STRICT_P(X))
 413
 414 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
 415
 416 /* LEGITIMIZE_RELOAD_ADDRESS will allow register R26/27 to be used, where it
 417    is no worse than normal base pointers R28/29 and R30/31. For example:
 418    If base offset is greater than 63 bytes or for R++ or --R addressing.  */
 419
 420 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN)    \
 421 do {                                                                        \
 422   if (1&&(GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC))     \
 423     {                                                                       \
 424       push_reload (XEXP (X,0), XEXP (X,0), &XEXP (X,0), &XEXP (X,0),        \
 425                    POINTER_REGS, GET_MODE (X),GET_MODE (X) , 0, 0,          \
 426                    OPNUM, RELOAD_OTHER);                                    \
 427       goto WIN;                                                             \
 428     }                                                                       \
 429   if (GET_CODE (X) == PLUS                                                  \
 430       && REG_P (XEXP (X, 0))                                                \
 431       && reg_equiv_constant[REGNO (XEXP (X, 0))] == 0                       \
 432       && GET_CODE (XEXP (X, 1)) == CONST_INT                                \
 433       && INTVAL (XEXP (X, 1)) >= 1)                                         \
 434     {                                                                       \
 435       int fit = INTVAL (XEXP (X, 1)) <= (64 - GET_MODE_SIZE (MODE));        \
 436       if (fit)                                                              \
 437         {                                                                   \
 438           if (reg_equiv_address[REGNO (XEXP (X, 0))] != 0)                  \
 439             {                                                               \
 440               int regno = REGNO (XEXP (X, 0));                              \
 441               rtx mem = make_memloc (X, regno);                             \
 442               push_reload (XEXP (mem,0), NULL, &XEXP (mem,0), NULL,         \
 443                            POINTER_REGS, Pmode, VOIDmode, 0, 0,             \
 444                            1, ADDR_TYPE (TYPE));                            \
 445               push_reload (mem, NULL_RTX, &XEXP (X, 0), NULL,               \
 446                            BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
 447                            OPNUM, TYPE);                                    \
 448               goto WIN;                                                     \
 449             }                                                               \
 450         }                                                                   \
 451       else if (! (frame_pointer_needed && XEXP (X,0) == frame_pointer_rtx)) \
 452         {                                                                   \
 453           push_reload (X, NULL_RTX, &X, NULL,                               \
 454                        POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0,          \
 455                        OPNUM, TYPE);                                        \
 456           goto WIN;                                                         \
 457         }                                                                   \
 458     }                                                                       \
 459 } while(0)
 460
 461 #define LEGITIMATE_CONSTANT_P(X) 1
 462
 463 #define REGISTER_MOVE_COST(MODE, FROM, TO) ((FROM) == STACK_REG ? 6 \
 464                                             : (TO) == STACK_REG ? 12 \
 465                                             : 2)
 466
 467 #define MEMORY_MOVE_COST(MODE,CLASS,IN) ((MODE)==QImode ? 2 :   \
 468                                          (MODE)==HImode ? 4 :   \
 469                                          (MODE)==SImode ? 8 :   \
 470                                          (MODE)==SFmode ? 8 : 16)
 471
 472 #define BRANCH_COST(speed_p, predictable_p) 0
 473
 474 #define SLOW_BYTE_ACCESS 0
 475
 476 #define NO_FUNCTION_CSE
 477
 478 #define TEXT_SECTION_ASM_OP "\t.text"
 479
 480 #define DATA_SECTION_ASM_OP "\t.data"
 481
 482 #define BSS_SECTION_ASM_OP "\t.section .bss"
 483
 484 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
 485    There are no shared libraries on this target, and these sections are
 486    placed in the read-only program memory, so they are not writable.  */
 487
 488 #undef CTORS_SECTION_ASM_OP
 489 #define CTORS_SECTION_ASM_OP "\t.section .ctors,\"a\",@progbits"
 490
 491 #undef DTORS_SECTION_ASM_OP
 492 #define DTORS_SECTION_ASM_OP "\t.section .dtors,\"a\",@progbits"
 493
 494 #define TARGET_ASM_CONSTRUCTOR avr_asm_out_ctor
 495
 496 #define TARGET_ASM_DESTRUCTOR avr_asm_out_dtor
 497
 498 #define SUPPORTS_INIT_PRIORITY 0
 499
 500 #define JUMP_TABLES_IN_TEXT_SECTION 0
 501
 502 #define ASM_COMMENT_START " ; "
 503
 504 #define ASM_APP_ON "/* #APP */\n"
 505
 506 #define ASM_APP_OFF "/* #NOAPP */\n"
 507
 508 /* Switch into a generic section.  */
 509 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
 510 #define TARGET_ASM_INIT_SECTIONS avr_asm_init_sections
 511
 512 #define ASM_OUTPUT_ASCII(FILE, P, SIZE)  gas_output_ascii (FILE,P,SIZE)
 513
 514 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C, STR) ((C) == '\n' || ((C) == '$'))
 515
 516 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)                     \
 517 do {                                                                       \
 518      fputs ("\t.comm ", (STREAM));                                         \
 519      assemble_name ((STREAM), (NAME));                                     \
 520      fprintf ((STREAM), ",%lu,1\n", (unsigned long)(SIZE));                \
 521 } while (0)
 522
 523 #define ASM_OUTPUT_BSS(FILE, DECL, NAME, SIZE, ROUNDED)                 \
 524   asm_output_bss ((FILE), (DECL), (NAME), (SIZE), (ROUNDED))
 525
 526 #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED)                   \
 527 do {                                                                    \
 528      fputs ("\t.lcomm ", (STREAM));                                     \
 529      assemble_name ((STREAM), (NAME));                                  \
 530      fprintf ((STREAM), ",%d\n", (int)(SIZE));                          \
 531 } while (0)
 532
 533 #undef TYPE_ASM_OP
 534 #undef SIZE_ASM_OP
 535 #undef WEAK_ASM_OP
 536 #define TYPE_ASM_OP     "\t.type\t"
 537 #define SIZE_ASM_OP     "\t.size\t"
 538 #define WEAK_ASM_OP     "\t.weak\t"
 539 /* Define the strings used for the special svr4 .type and .size directives.
 540    These strings generally do not vary from one system running svr4 to
 541    another, but if a given system (e.g. m88k running svr) needs to use
 542    different pseudo-op names for these, they may be overridden in the
 543    file which includes this one.  */
 544
 545
 546 #undef TYPE_OPERAND_FMT
 547 #define TYPE_OPERAND_FMT        "@%s"
 548 /* The following macro defines the format used to output the second
 549    operand of the .type assembler directive.  Different svr4 assemblers
 550    expect various different forms for this operand.  The one given here
 551    is just a default.  You may need to override it in your machine-
 552    specific tm.h file (depending upon the particulars of your assembler).  */
 553
 554 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 555 avr_asm_declare_function_name ((FILE), (NAME), (DECL))
 556
 557 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)                    \
 558   do {                                                                  \
 559     if (!flag_inhibit_size_directive)                                   \
 560       ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                           \
 561   } while (0)
 562
 563 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 564 do {                                                                    \
 565   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");                     \
 566   size_directive_output = 0;                                            \
 567   if (!flag_inhibit_size_directive && DECL_SIZE (DECL))                 \
 568     {                                                                   \
 569       size_directive_output = 1;                                        \
 570       ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME,                            \
 571                                  int_size_in_bytes (TREE_TYPE (DECL))); \
 572     }                                                                   \
 573   ASM_OUTPUT_LABEL(FILE, NAME);                                         \
 574 } while (0)
 575
 576 #undef ASM_FINISH_DECLARE_OBJECT
 577 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)         \
 578 do {                                                                     \
 579      const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);             \
 580      HOST_WIDE_INT size;                                                 \
 581      if (!flag_inhibit_size_directive && DECL_SIZE (DECL)                \
 582          && ! AT_END && TOP_LEVEL                                        \
 583          && DECL_INITIAL (DECL) == error_mark_node                       \
 584          && !size_directive_output)                                      \
 585        {                                                                 \
 586          size_directive_output = 1;                                      \
 587          size = int_size_in_bytes (TREE_TYPE (DECL));                    \
 588          ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size);                   \
 589        }                                                                 \
 590    } while (0)
 591
 592
 593 #define ESCAPES \
 594 "\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\
 595 \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\
 596 \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\
 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\1\
 598 \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\
 599 \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\
 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 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
 603    ASM_OUTPUT_LIMITED_STRING macros.  Each byte in the table
 604    corresponds to a particular byte value [0..255].  For any
 605    given byte value, if the value in the corresponding table
 606    position is zero, the given character can be output directly.
 607    If the table value is 1, the byte must be output as a \ooo
 608    octal escape.  If the tables value is anything else, then the
 609    byte value should be output as a \ followed by the value
 610    in the table.  Note that we can use standard UN*X escape
 611    sequences for many control characters, but we don't use
 612    \a to represent BEL because some svr4 assemblers (e.g. on
 613    the i386) don't know about that.  Also, we don't use \v
 614    since some versions of gas, such as 2.2 did not accept it.  */
 615
 616 #define STRING_LIMIT    ((unsigned) 64)
 617 #define STRING_ASM_OP   "\t.string\t"
 618 /* Some svr4 assemblers have a limit on the number of characters which
 619    can appear in the operand of a .string directive.  If your assembler
 620    has such a limitation, you should define STRING_LIMIT to reflect that
 621    limit.  Note that at least some svr4 assemblers have a limit on the
 622    actual number of bytes in the double-quoted string, and that they
 623    count each character in an escape sequence as one byte.  Thus, an
 624    escape sequence like \377 would count as four bytes.
 625
 626    If your target assembler doesn't support the .string directive, you
 627    should define this to zero.  */
 628
 629 /* Globalizing directive for a label.  */
 630 #define GLOBAL_ASM_OP ".global\t"
 631
 632 #define SET_ASM_OP      "\t.set\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     "__SP_L__","__SP_H__","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) == '~' || (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_HAVE_MOVW
 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   (switch_to_section (progmem_section), \
 686    (*targetm.asm_out.internal_label) (STREAM, PREFIX, NUM))
 687
 688 #define ASM_OUTPUT_SKIP(STREAM, N)              \
 689 fprintf (STREAM, "\t.skip %lu,0\n", (unsigned long)(N))
 690
 691 #define ASM_OUTPUT_ALIGN(STREAM, POWER)                 \
 692   do {                                                  \
 693       if ((POWER) > 1)                                  \
 694           fprintf (STREAM, "\t.p2align\t%d\n", POWER);  \
 695   } while (0)
 696
 697 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
 698   default_elf_asm_output_external (FILE, DECL, NAME)
 699
 700 #define CASE_VECTOR_MODE HImode
 701
 702 #undef WORD_REGISTER_OPERATIONS
 703
 704 #define MOVE_MAX 4
 705
 706 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
 707
 708 #define Pmode HImode
 709
 710 #define FUNCTION_MODE HImode
 711
 712 #define DOLLARS_IN_IDENTIFIERS 0
 713
 714 #define NO_DOLLAR_IN_LABEL 1
 715
 716 #define TRAMPOLINE_SIZE 4
 717
 718 /* Store in cc_status the expressions
 719    that the condition codes will describe
 720    after execution of an instruction whose pattern is EXP.
 721    Do not alter them if the instruction would not alter the cc's.  */
 722
 723 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
 724
 725 /* The add insns don't set overflow in a usable way.  */
 726 #define CC_OVERFLOW_UNUSABLE 01000
 727 /* The mov,and,or,xor insns don't set carry.  That's ok though as the
 728    Z bit is all we need when doing unsigned comparisons on the result of
 729    these insns (since they're always with 0).  However, conditions.h has
 730    CC_NO_OVERFLOW defined for this purpose.  Rename it to something more
 731    understandable.  */
 732 #define CC_NO_CARRY CC_NO_OVERFLOW
 733
 734
 735 /* Output assembler code to FILE to increment profiler label # LABELNO
 736    for profiling a function entry.  */
 737
 738 #define FUNCTION_PROFILER(FILE, LABELNO)  \
 739   fprintf (FILE, "/* profiler %d */", (LABELNO))
 740
 741 #define ADJUST_INSN_LENGTH(INSN, LENGTH) (LENGTH =\
 742                                           adjust_insn_length (INSN, LENGTH))
 743
 744 extern const char *avr_device_to_arch (int argc, const char **argv);
 745 extern const char *avr_device_to_data_start (int argc, const char **argv);
 746 extern const char *avr_device_to_startfiles (int argc, const char **argv);
 747 extern const char *avr_device_to_devicelib (int argc, const char **argv);
 748
 749 #define EXTRA_SPEC_FUNCTIONS \
 750   { "device_to_arch", avr_device_to_arch }, \
 751   { "device_to_data_start", avr_device_to_data_start }, \
 752   { "device_to_startfile", avr_device_to_startfiles }, \
 753   { "device_to_devicelib", avr_device_to_devicelib },
 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 driver program options to
 763    pass to `cc1plus'.  */
 764
 765 #define ASM_SPEC "%{mmcu=avr25:-mmcu=avr2;mmcu=avr35:-mmcu=avr3;mmcu=avr31:-mmcu=avr3;mmcu=avr51:-mmcu=avr5;\
 766 mmcu=*:-mmcu=%*}"
 767
 768 #define LINK_SPEC "\
 769 %{mrelax:--relax\
 770          %{mpmem-wrap-around:%{mmcu=at90usb8*:--pmem-wrap-around=8k}\
 771                              %{mmcu=atmega16*:--pmem-wrap-around=16k}\
 772                              %{mmcu=atmega32*|\
 773                                mmcu=at90can32*:--pmem-wrap-around=32k}\
 774                              %{mmcu=atmega64*|\
 775                                mmcu=at90can64*|\
 776                                mmcu=at90usb64*:--pmem-wrap-around=64k}}}\
 777 %:device_to_arch(%{mmcu=*:%*})\
 778 %:device_to_data_start(%{mmcu=*:%*})"
 779
 780 #define LIB_SPEC \
 781   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lc }}}}}"
 782
 783 #define LIBSTDCXX "-lgcc"
 784 /* No libstdc++ for now.  Empty string doesn't work.  */
 785
 786 #define LIBGCC_SPEC \
 787   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lgcc }}}}}"
 788
 789 #define STARTFILE_SPEC "%:device_to_startfile(%{mmcu=*:%*})"
 790
 791 #define ENDFILE_SPEC ""
 792
 793 /* This is the default without any -mmcu=* option (AT90S*).  */
 794 #define MULTILIB_DEFAULTS { "mmcu=avr2" }
 795
 796 #define TEST_HARD_REG_CLASS(CLASS, REGNO) \
 797   TEST_HARD_REG_BIT (reg_class_contents[ (int) (CLASS)], REGNO)
 798
 799 /* Note that the other files fail to use these
 800    in some of the places where they should.  */
 801
 802 #if defined(__STDC__) || defined(ALMOST_STDC)
 803 #define AS2(a,b,c) #a " " #b "," #c
 804 #define AS2C(b,c) " " #b "," #c
 805 #define AS3(a,b,c,d) #a " " #b "," #c "," #d
 806 #define AS1(a,b) #a " " #b
 807 #else
 808 #define AS1(a,b) "a     b"
 809 #define AS2(a,b,c) "a   b,c"
 810 #define AS2C(b,c) " b,c"
 811 #define AS3(a,b,c,d) "a b,c,d"
 812 #endif
 813 #define OUT_AS1(a,b) output_asm_insn (AS1(a,b), operands)
 814 #define OUT_AS2(a,b,c) output_asm_insn (AS2(a,b,c), operands)
 815 #define CR_TAB "\n\t"
 816
 817 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 818
 819 #define DWARF2_DEBUGGING_INFO 1
 820
 821 #define DWARF2_ADDR_SIZE 4
 822
 823 #define OBJECT_FORMAT_ELF
 824
 825 #define HARD_REGNO_RENAME_OK(OLD_REG, NEW_REG) \
 826   avr_hard_regno_rename_ok (OLD_REG, NEW_REG)
 827
 828 /* A C structure for machine-specific, per-function data.
 829    This is added to the cfun structure.  */
 830 struct GTY(()) machine_function
 831 {
 832   /* 'true' - if current function is a naked function.  */
 833   int is_naked;
 834
 835   /* 'true' - if current function is an interrupt function
 836      as specified by the "interrupt" attribute.  */
 837   int is_interrupt;
 838
 839   /* 'true' - if current function is a signal function
 840      as specified by the "signal" attribute.  */
 841   int is_signal;
 842
 843   /* 'true' - if current function is a 'task' function
 844      as specified by the "OS_task" attribute.  */
 845   int is_OS_task;
 846
 847   /* 'true' - if current function is a 'main' function
 848      as specified by the "OS_main" attribute.  */
 849   int is_OS_main;
 850
 851   /* Current function stack size.  */
 852   int stack_usage;
 853 };