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, 2011
   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 BITS_BIG_ENDIAN 0
 128 #define BYTES_BIG_ENDIAN 0
 129 #define WORDS_BIG_ENDIAN 0
 130
 131 #ifdef IN_LIBGCC2
 132 /* This is to get correct SI and DI modes in libgcc2.c (32 and 64 bits).  */
 133 #define UNITS_PER_WORD 4
 134 #else
 135 /* Width of a word, in units (bytes).  */
 136 #define UNITS_PER_WORD 1
 137 #endif
 138
 139 #define POINTER_SIZE 16
 140
 141
 142 /* Maximum sized of reasonable data type
 143    DImode or Dfmode ...  */
 144 #define MAX_FIXED_MODE_SIZE 32
 145
 146 #define PARM_BOUNDARY 8
 147
 148 #define FUNCTION_BOUNDARY 8
 149
 150 #define EMPTY_FIELD_BOUNDARY 8
 151
 152 /* No data type wants to be aligned rounder than this.  */
 153 #define BIGGEST_ALIGNMENT 8
 154
 155 #define MAX_OFILE_ALIGNMENT (32768 * 8)
 156
 157 #define TARGET_VTABLE_ENTRY_ALIGN 8
 158
 159 #define STRICT_ALIGNMENT 0
 160
 161 #define INT_TYPE_SIZE (TARGET_INT8 ? 8 : 16)
 162 #define SHORT_TYPE_SIZE (INT_TYPE_SIZE == 8 ? INT_TYPE_SIZE : 16)
 163 #define LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 16 : 32)
 164 #define LONG_LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 32 : 64)
 165 #define FLOAT_TYPE_SIZE 32
 166 #define DOUBLE_TYPE_SIZE 32
 167 #define LONG_DOUBLE_TYPE_SIZE 32
 168
 169 #define DEFAULT_SIGNED_CHAR 1
 170
 171 #define SIZE_TYPE (INT_TYPE_SIZE == 8 ? "long unsigned int" : "unsigned int")
 172 #define PTRDIFF_TYPE (INT_TYPE_SIZE == 8 ? "long int" :"int")
 173
 174 #define WCHAR_TYPE_SIZE 16
 175
 176 #define FIRST_PSEUDO_REGISTER 36
 177
 178 #define FIXED_REGISTERS {\
 179   1,1,/* r0 r1 */\
 180   0,0,/* r2 r3 */\
 181   0,0,/* r4 r5 */\
 182   0,0,/* r6 r7 */\
 183   0,0,/* r8 r9 */\
 184   0,0,/* r10 r11 */\
 185   0,0,/* r12 r13 */\
 186   0,0,/* r14 r15 */\
 187   0,0,/* r16 r17 */\
 188   0,0,/* r18 r19 */\
 189   0,0,/* r20 r21 */\
 190   0,0,/* r22 r23 */\
 191   0,0,/* r24 r25 */\
 192   0,0,/* r26 r27 */\
 193   0,0,/* r28 r29 */\
 194   0,0,/* r30 r31 */\
 195   1,1,/*  STACK */\
 196   1,1 /* arg pointer */  }
 197
 198 #define CALL_USED_REGISTERS {                   \
 199   1,1,/* r0 r1 */                               \
 200     0,0,/* r2 r3 */                             \
 201     0,0,/* r4 r5 */                             \
 202     0,0,/* r6 r7 */                             \
 203     0,0,/* r8 r9 */                             \
 204     0,0,/* r10 r11 */                           \
 205     0,0,/* r12 r13 */                           \
 206     0,0,/* r14 r15 */                           \
 207     0,0,/* r16 r17 */                           \
 208     1,1,/* r18 r19 */                           \
 209     1,1,/* r20 r21 */                           \
 210     1,1,/* r22 r23 */                           \
 211     1,1,/* r24 r25 */                           \
 212     1,1,/* r26 r27 */                           \
 213     0,0,/* r28 r29 */                           \
 214     1,1,/* r30 r31 */                           \
 215     1,1,/*  STACK */                            \
 216     1,1 /* arg pointer */  }
 217
 218 #define REG_ALLOC_ORDER {                       \
 219     24,25,                                      \
 220     18,19,                                      \
 221     20,21,                                      \
 222     22,23,                                      \
 223     30,31,                                      \
 224     26,27,                                      \
 225     28,29,                                      \
 226     17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,    \
 227     0,1,                                        \
 228     32,33,34,35                                 \
 229     }
 230
 231 #define ADJUST_REG_ALLOC_ORDER order_regs_for_local_alloc ()
 232
 233
 234 #define HARD_REGNO_NREGS(REGNO, MODE) ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
 235
 236 #define HARD_REGNO_MODE_OK(REGNO, MODE) avr_hard_regno_mode_ok(REGNO, MODE)
 237
 238 #define MODES_TIEABLE_P(MODE1, MODE2) 1
 239
 240 enum reg_class {
 241   NO_REGS,
 242   R0_REG,                       /* r0 */
 243   POINTER_X_REGS,               /* r26 - r27 */
 244   POINTER_Y_REGS,               /* r28 - r29 */
 245   POINTER_Z_REGS,               /* r30 - r31 */
 246   STACK_REG,                    /* STACK */
 247   BASE_POINTER_REGS,            /* r28 - r31 */
 248   POINTER_REGS,                 /* r26 - r31 */
 249   ADDW_REGS,                    /* r24 - r31 */
 250   SIMPLE_LD_REGS,               /* r16 - r23 */
 251   LD_REGS,                      /* r16 - r31 */
 252   NO_LD_REGS,                   /* r0 - r15 */
 253   GENERAL_REGS,                 /* r0 - r31 */
 254   ALL_REGS, LIM_REG_CLASSES
 255 };
 256
 257
 258 #define N_REG_CLASSES (int)LIM_REG_CLASSES
 259
 260 #define REG_CLASS_NAMES {                                       \
 261                  "NO_REGS",                                     \
 262                    "R0_REG",    /* r0 */                        \
 263                    "POINTER_X_REGS", /* r26 - r27 */            \
 264                    "POINTER_Y_REGS", /* r28 - r29 */            \
 265                    "POINTER_Z_REGS", /* r30 - r31 */            \
 266                    "STACK_REG", /* STACK */                     \
 267                    "BASE_POINTER_REGS", /* r28 - r31 */         \
 268                    "POINTER_REGS", /* r26 - r31 */              \
 269                    "ADDW_REGS", /* r24 - r31 */                 \
 270                    "SIMPLE_LD_REGS", /* r16 - r23 */            \
 271                    "LD_REGS",   /* r16 - r31 */                 \
 272                    "NO_LD_REGS", /* r0 - r15 */                 \
 273                    "GENERAL_REGS", /* r0 - r31 */               \
 274                    "ALL_REGS" }
 275
 276 #define REG_CLASS_CONTENTS {                                            \
 277   {0x00000000,0x00000000},      /* NO_REGS */                           \
 278   {0x00000001,0x00000000},      /* R0_REG */                            \
 279   {3 << REG_X,0x00000000},      /* POINTER_X_REGS, r26 - r27 */         \
 280   {3 << REG_Y,0x00000000},      /* POINTER_Y_REGS, r28 - r29 */         \
 281   {3 << REG_Z,0x00000000},      /* POINTER_Z_REGS, r30 - r31 */         \
 282   {0x00000000,0x00000003},      /* STACK_REG, STACK */                  \
 283   {(3 << REG_Y) | (3 << REG_Z),                                         \
 284      0x00000000},               /* BASE_POINTER_REGS, r28 - r31 */      \
 285   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z),                          \
 286      0x00000000},               /* POINTER_REGS, r26 - r31 */           \
 287   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z) | (3 << REG_W),           \
 288      0x00000000},               /* ADDW_REGS, r24 - r31 */              \
 289   {0x00ff0000,0x00000000},      /* SIMPLE_LD_REGS r16 - r23 */          \
 290   {(3 << REG_X)|(3 << REG_Y)|(3 << REG_Z)|(3 << REG_W)|(0xff << 16),    \
 291      0x00000000},       /* LD_REGS, r16 - r31 */                        \
 292   {0x0000ffff,0x00000000},      /* NO_LD_REGS  r0 - r15 */              \
 293   {0xffffffff,0x00000000},      /* GENERAL_REGS, r0 - r31 */            \
 294   {0xffffffff,0x00000003}       /* ALL_REGS */                          \
 295 }
 296
 297 #define REGNO_REG_CLASS(R) avr_regno_reg_class(R)
 298
 299 /* The following macro defines cover classes for Integrated Register
 300    Allocator.  Cover classes is a set of non-intersected register
 301    classes covering all hard registers used for register allocation
 302    purpose.  Any move between two registers of a cover class should be
 303    cheaper than load or store of the registers.  The macro value is
 304    array of register classes with LIM_REG_CLASSES used as the end
 305    marker.  */
 306
 307 #define IRA_COVER_CLASSES               \
 308 {                                       \
 309   GENERAL_REGS, LIM_REG_CLASSES         \
 310 }
 311
 312 #define BASE_REG_CLASS (reload_completed ? BASE_POINTER_REGS : POINTER_REGS)
 313
 314 #define INDEX_REG_CLASS NO_REGS
 315
 316 #define REGNO_OK_FOR_BASE_P(r) (((r) < FIRST_PSEUDO_REGISTER            \
 317                                  && ((r) == REG_X                       \
 318                                      || (r) == REG_Y                    \
 319                                      || (r) == REG_Z                    \
 320                                      || (r) == ARG_POINTER_REGNUM))     \
 321                                 || (reg_renumber                        \
 322                                     && (reg_renumber[r] == REG_X        \
 323                                         || reg_renumber[r] == REG_Y     \
 324                                         || reg_renumber[r] == REG_Z     \
 325                                         || (reg_renumber[r]             \
 326                                             == ARG_POINTER_REGNUM))))
 327
 328 #define REGNO_OK_FOR_INDEX_P(NUM) 0
 329
 330 #define TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P hook_bool_mode_true
 331
 332 #define CLASS_MAX_NREGS(CLASS, MODE)   class_max_nregs (CLASS, MODE)
 333
 334 #define STACK_PUSH_CODE POST_DEC
 335
 336 #define STACK_GROWS_DOWNWARD
 337
 338 #define STARTING_FRAME_OFFSET 1
 339
 340 #define STACK_POINTER_OFFSET 1
 341
 342 #define FIRST_PARM_OFFSET(FUNDECL) 0
 343
 344 #define STACK_BOUNDARY 8
 345
 346 #define STACK_POINTER_REGNUM 32
 347
 348 #define FRAME_POINTER_REGNUM REG_Y
 349
 350 #define ARG_POINTER_REGNUM 34
 351
 352 #define STATIC_CHAIN_REGNUM 2
 353
 354 /* Offset from the frame pointer register value to the top of the stack.  */
 355 #define FRAME_POINTER_CFA_OFFSET(FNDECL) 0
 356
 357 #define ELIMINABLE_REGS {                                       \
 358       {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},               \
 359         {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}            \
 360        ,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}}
 361
 362 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                    \
 363   OFFSET = avr_initial_elimination_offset (FROM, TO)
 364
 365 #define RETURN_ADDR_RTX(count, tem) avr_return_addr_rtx (count, tem)
 366
 367 /* Don't use Push rounding. expr.c: emit_single_push_insn is broken
 368    for POST_DEC targets (PR27386).  */
 369 /*#define PUSH_ROUNDING(NPUSHED) (NPUSHED)*/
 370
 371 typedef struct avr_args {
 372   int nregs;                    /* # registers available for passing */
 373   int regno;                    /* next available register number */
 374 } CUMULATIVE_ARGS;
 375
 376 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
 377   init_cumulative_args (&(CUM), FNTYPE, LIBNAME, FNDECL)
 378
 379 #define FUNCTION_ARG_REGNO_P(r) function_arg_regno_p(r)
 380
 381 extern int avr_reg_order[];
 382
 383 #define RET_REGISTER avr_ret_register ()
 384
 385 #define LIBCALL_VALUE(MODE)  avr_libcall_value (MODE)
 386
 387 #define FUNCTION_VALUE_REGNO_P(N) ((int) (N) == RET_REGISTER)
 388
 389 #define DEFAULT_PCC_STRUCT_RETURN 0
 390
 391 #define EPILOGUE_USES(REGNO) avr_epilogue_uses(REGNO)
 392
 393 #define HAVE_POST_INCREMENT 1
 394 #define HAVE_PRE_DECREMENT 1
 395
 396 #define MAX_REGS_PER_ADDRESS 1
 397
 398 #define REG_OK_FOR_BASE_NOSTRICT_P(X) \
 399   (REGNO (X) >= FIRST_PSEUDO_REGISTER || REG_OK_FOR_BASE_STRICT_P(X))
 400
 401 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
 402
 403 /* LEGITIMIZE_RELOAD_ADDRESS will allow register R26/27 to be used, where it
 404    is no worse than normal base pointers R28/29 and R30/31. For example:
 405    If base offset is greater than 63 bytes or for R++ or --R addressing.  */
 406
 407 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN)    \
 408 do {                                                                        \
 409   if (1&&(GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC))     \
 410     {                                                                       \
 411       push_reload (XEXP (X,0), XEXP (X,0), &XEXP (X,0), &XEXP (X,0),        \
 412                    POINTER_REGS, GET_MODE (X),GET_MODE (X) , 0, 0,          \
 413                    OPNUM, RELOAD_OTHER);                                    \
 414       goto WIN;                                                             \
 415     }                                                                       \
 416   if (GET_CODE (X) == PLUS                                                  \
 417       && REG_P (XEXP (X, 0))                                                \
 418       && reg_equiv_constant[REGNO (XEXP (X, 0))] == 0                       \
 419       && GET_CODE (XEXP (X, 1)) == CONST_INT                                \
 420       && INTVAL (XEXP (X, 1)) >= 1)                                         \
 421     {                                                                       \
 422       int fit = INTVAL (XEXP (X, 1)) <= (64 - GET_MODE_SIZE (MODE));        \
 423       if (fit)                                                              \
 424         {                                                                   \
 425           if (reg_equiv_address[REGNO (XEXP (X, 0))] != 0)                  \
 426             {                                                               \
 427               int regno = REGNO (XEXP (X, 0));                              \
 428               rtx mem = make_memloc (X, regno);                             \
 429               push_reload (XEXP (mem,0), NULL, &XEXP (mem,0), NULL,         \
 430                            POINTER_REGS, Pmode, VOIDmode, 0, 0,             \
 431                            1, ADDR_TYPE (TYPE));                            \
 432               push_reload (mem, NULL_RTX, &XEXP (X, 0), NULL,               \
 433                            BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
 434                            OPNUM, TYPE);                                    \
 435               goto WIN;                                                     \
 436             }                                                               \
 437         }                                                                   \
 438       else if (! (frame_pointer_needed && XEXP (X,0) == frame_pointer_rtx)) \
 439         {                                                                   \
 440           push_reload (X, NULL_RTX, &X, NULL,                               \
 441                        POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0,          \
 442                        OPNUM, TYPE);                                        \
 443           goto WIN;                                                         \
 444         }                                                                   \
 445     }                                                                       \
 446 } while(0)
 447
 448 #define LEGITIMATE_CONSTANT_P(X) 1
 449
 450 #define REGISTER_MOVE_COST(MODE, FROM, TO) ((FROM) == STACK_REG ? 6 \
 451                                             : (TO) == STACK_REG ? 12 \
 452                                             : 2)
 453
 454 #define MEMORY_MOVE_COST(MODE,CLASS,IN) ((MODE)==QImode ? 2 :   \
 455                                          (MODE)==HImode ? 4 :   \
 456                                          (MODE)==SImode ? 8 :   \
 457                                          (MODE)==SFmode ? 8 : 16)
 458
 459 #define BRANCH_COST(speed_p, predictable_p) 0
 460
 461 #define SLOW_BYTE_ACCESS 0
 462
 463 #define NO_FUNCTION_CSE
 464
 465 #define TEXT_SECTION_ASM_OP "\t.text"
 466
 467 #define DATA_SECTION_ASM_OP "\t.data"
 468
 469 #define BSS_SECTION_ASM_OP "\t.section .bss"
 470
 471 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
 472    There are no shared libraries on this target, and these sections are
 473    placed in the read-only program memory, so they are not writable.  */
 474
 475 #undef CTORS_SECTION_ASM_OP
 476 #define CTORS_SECTION_ASM_OP "\t.section .ctors,\"a\",@progbits"
 477
 478 #undef DTORS_SECTION_ASM_OP
 479 #define DTORS_SECTION_ASM_OP "\t.section .dtors,\"a\",@progbits"
 480
 481 #define TARGET_ASM_CONSTRUCTOR avr_asm_out_ctor
 482
 483 #define TARGET_ASM_DESTRUCTOR avr_asm_out_dtor
 484
 485 #define SUPPORTS_INIT_PRIORITY 0
 486
 487 #define JUMP_TABLES_IN_TEXT_SECTION 0
 488
 489 #define ASM_COMMENT_START " ; "
 490
 491 #define ASM_APP_ON "/* #APP */\n"
 492
 493 #define ASM_APP_OFF "/* #NOAPP */\n"
 494
 495 /* Switch into a generic section.  */
 496 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
 497 #define TARGET_ASM_INIT_SECTIONS avr_asm_init_sections
 498
 499 #define ASM_OUTPUT_ASCII(FILE, P, SIZE)  gas_output_ascii (FILE,P,SIZE)
 500
 501 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C, STR) ((C) == '\n' || ((C) == '$'))
 502
 503 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)                     \
 504 do {                                                                       \
 505      fputs ("\t.comm ", (STREAM));                                         \
 506      assemble_name ((STREAM), (NAME));                                     \
 507      fprintf ((STREAM), ",%lu,1\n", (unsigned long)(SIZE));                \
 508 } while (0)
 509
 510 #define ASM_OUTPUT_BSS(FILE, DECL, NAME, SIZE, ROUNDED)                 \
 511   asm_output_bss ((FILE), (DECL), (NAME), (SIZE), (ROUNDED))
 512
 513 #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED)                   \
 514 do {                                                                    \
 515      fputs ("\t.lcomm ", (STREAM));                                     \
 516      assemble_name ((STREAM), (NAME));                                  \
 517      fprintf ((STREAM), ",%d\n", (int)(SIZE));                          \
 518 } while (0)
 519
 520 #undef TYPE_ASM_OP
 521 #undef SIZE_ASM_OP
 522 #undef WEAK_ASM_OP
 523 #define TYPE_ASM_OP     "\t.type\t"
 524 #define SIZE_ASM_OP     "\t.size\t"
 525 #define WEAK_ASM_OP     "\t.weak\t"
 526 /* Define the strings used for the special svr4 .type and .size directives.
 527    These strings generally do not vary from one system running svr4 to
 528    another, but if a given system (e.g. m88k running svr) needs to use
 529    different pseudo-op names for these, they may be overridden in the
 530    file which includes this one.  */
 531
 532
 533 #undef TYPE_OPERAND_FMT
 534 #define TYPE_OPERAND_FMT        "@%s"
 535 /* The following macro defines the format used to output the second
 536    operand of the .type assembler directive.  Different svr4 assemblers
 537    expect various different forms for this operand.  The one given here
 538    is just a default.  You may need to override it in your machine-
 539    specific tm.h file (depending upon the particulars of your assembler).  */
 540
 541 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 542 avr_asm_declare_function_name ((FILE), (NAME), (DECL))
 543
 544 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)                    \
 545   do {                                                                  \
 546     if (!flag_inhibit_size_directive)                                   \
 547       ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                           \
 548   } while (0)
 549
 550 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 551 do {                                                                    \
 552   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");                     \
 553   size_directive_output = 0;                                            \
 554   if (!flag_inhibit_size_directive && DECL_SIZE (DECL))                 \
 555     {                                                                   \
 556       size_directive_output = 1;                                        \
 557       ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME,                            \
 558                                  int_size_in_bytes (TREE_TYPE (DECL))); \
 559     }                                                                   \
 560   ASM_OUTPUT_LABEL(FILE, NAME);                                         \
 561 } while (0)
 562
 563 #undef ASM_FINISH_DECLARE_OBJECT
 564 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)         \
 565 do {                                                                     \
 566      const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);             \
 567      HOST_WIDE_INT size;                                                 \
 568      if (!flag_inhibit_size_directive && DECL_SIZE (DECL)                \
 569          && ! AT_END && TOP_LEVEL                                        \
 570          && DECL_INITIAL (DECL) == error_mark_node                       \
 571          && !size_directive_output)                                      \
 572        {                                                                 \
 573          size_directive_output = 1;                                      \
 574          size = int_size_in_bytes (TREE_TYPE (DECL));                    \
 575          ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size);                   \
 576        }                                                                 \
 577    } while (0)
 578
 579
 580 #define ESCAPES \
 581 "\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\
 582 \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\
 583 \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\
 584 \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\
 585 \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\
 586 \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\
 587 \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\
 588 \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"
 589 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
 590    ASM_OUTPUT_LIMITED_STRING macros.  Each byte in the table
 591    corresponds to a particular byte value [0..255].  For any
 592    given byte value, if the value in the corresponding table
 593    position is zero, the given character can be output directly.
 594    If the table value is 1, the byte must be output as a \ooo
 595    octal escape.  If the tables value is anything else, then the
 596    byte value should be output as a \ followed by the value
 597    in the table.  Note that we can use standard UN*X escape
 598    sequences for many control characters, but we don't use
 599    \a to represent BEL because some svr4 assemblers (e.g. on
 600    the i386) don't know about that.  Also, we don't use \v
 601    since some versions of gas, such as 2.2 did not accept it.  */
 602
 603 #define STRING_LIMIT    ((unsigned) 64)
 604 #define STRING_ASM_OP   "\t.string\t"
 605 /* Some svr4 assemblers have a limit on the number of characters which
 606    can appear in the operand of a .string directive.  If your assembler
 607    has such a limitation, you should define STRING_LIMIT to reflect that
 608    limit.  Note that at least some svr4 assemblers have a limit on the
 609    actual number of bytes in the double-quoted string, and that they
 610    count each character in an escape sequence as one byte.  Thus, an
 611    escape sequence like \377 would count as four bytes.
 612
 613    If your target assembler doesn't support the .string directive, you
 614    should define this to zero.  */
 615
 616 /* Globalizing directive for a label.  */
 617 #define GLOBAL_ASM_OP ".global\t"
 618
 619 #define SET_ASM_OP      "\t.set\t"
 620
 621 #define ASM_WEAKEN_LABEL(FILE, NAME)    \
 622   do                                    \
 623     {                                   \
 624       fputs ("\t.weak\t", (FILE));      \
 625       assemble_name ((FILE), (NAME));   \
 626       fputc ('\n', (FILE));             \
 627     }                                   \
 628   while (0)
 629
 630 #define SUPPORTS_WEAK 1
 631
 632 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)        \
 633 sprintf (STRING, "*.%s%lu", PREFIX, (unsigned long)(NUM))
 634
 635 #define HAS_INIT_SECTION 1
 636
 637 #define REGISTER_NAMES {                                \
 638   "r0","r1","r2","r3","r4","r5","r6","r7",              \
 639     "r8","r9","r10","r11","r12","r13","r14","r15",      \
 640     "r16","r17","r18","r19","r20","r21","r22","r23",    \
 641     "r24","r25","r26","r27","r28","r29","r30","r31",    \
 642     "__SP_L__","__SP_H__","argL","argH"}
 643
 644 #define FINAL_PRESCAN_INSN(insn, operand, nop) final_prescan_insn (insn, operand,nop)
 645
 646 #define PRINT_OPERAND(STREAM, X, CODE) print_operand (STREAM, X, CODE)
 647
 648 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '~' || (CODE) == '!')
 649
 650 #define PRINT_OPERAND_ADDRESS(STREAM, X) print_operand_address(STREAM, X)
 651
 652 #define USER_LABEL_PREFIX ""
 653
 654 #define ASSEMBLER_DIALECT AVR_HAVE_MOVW
 655
 656 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO)      \
 657 {                                               \
 658   gcc_assert (REGNO < 32);                      \
 659   fprintf (STREAM, "\tpush\tr%d", REGNO);       \
 660 }
 661
 662 #define ASM_OUTPUT_REG_POP(STREAM, REGNO)       \
 663 {                                               \
 664   gcc_assert (REGNO < 32);                      \
 665   fprintf (STREAM, "\tpop\tr%d", REGNO);        \
 666 }
 667
 668 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)          \
 669   avr_output_addr_vec_elt(STREAM, VALUE)
 670
 671 #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) \
 672   (switch_to_section (progmem_section), \
 673    (*targetm.asm_out.internal_label) (STREAM, PREFIX, NUM))
 674
 675 #define ASM_OUTPUT_SKIP(STREAM, N)              \
 676 fprintf (STREAM, "\t.skip %lu,0\n", (unsigned long)(N))
 677
 678 #define ASM_OUTPUT_ALIGN(STREAM, POWER)                 \
 679   do {                                                  \
 680       if ((POWER) > 1)                                  \
 681           fprintf (STREAM, "\t.p2align\t%d\n", POWER);  \
 682   } while (0)
 683
 684 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
 685   default_elf_asm_output_external (FILE, DECL, NAME)
 686
 687 #define CASE_VECTOR_MODE HImode
 688
 689 #undef WORD_REGISTER_OPERATIONS
 690
 691 #define MOVE_MAX 4
 692
 693 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
 694
 695 #define Pmode HImode
 696
 697 #define FUNCTION_MODE HImode
 698
 699 #define DOLLARS_IN_IDENTIFIERS 0
 700
 701 #define NO_DOLLAR_IN_LABEL 1
 702
 703 #define TRAMPOLINE_SIZE 4
 704
 705 /* Store in cc_status the expressions
 706    that the condition codes will describe
 707    after execution of an instruction whose pattern is EXP.
 708    Do not alter them if the instruction would not alter the cc's.  */
 709
 710 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
 711
 712 /* The add insns don't set overflow in a usable way.  */
 713 #define CC_OVERFLOW_UNUSABLE 01000
 714 /* The mov,and,or,xor insns don't set carry.  That's ok though as the
 715    Z bit is all we need when doing unsigned comparisons on the result of
 716    these insns (since they're always with 0).  However, conditions.h has
 717    CC_NO_OVERFLOW defined for this purpose.  Rename it to something more
 718    understandable.  */
 719 #define CC_NO_CARRY CC_NO_OVERFLOW
 720
 721
 722 /* Output assembler code to FILE to increment profiler label # LABELNO
 723    for profiling a function entry.  */
 724
 725 #define FUNCTION_PROFILER(FILE, LABELNO)  \
 726   fprintf (FILE, "/* profiler %d */", (LABELNO))
 727
 728 #define ADJUST_INSN_LENGTH(INSN, LENGTH) (LENGTH =\
 729                                           adjust_insn_length (INSN, LENGTH))
 730
 731 extern const char *avr_device_to_arch (int argc, const char **argv);
 732 extern const char *avr_device_to_data_start (int argc, const char **argv);
 733 extern const char *avr_device_to_startfiles (int argc, const char **argv);
 734 extern const char *avr_device_to_devicelib (int argc, const char **argv);
 735
 736 #define EXTRA_SPEC_FUNCTIONS \
 737   { "device_to_arch", avr_device_to_arch }, \
 738   { "device_to_data_start", avr_device_to_data_start }, \
 739   { "device_to_startfile", avr_device_to_startfiles }, \
 740   { "device_to_devicelib", avr_device_to_devicelib },
 741
 742 #define CPP_SPEC ""
 743
 744 #define CC1_SPEC ""
 745
 746 #define CC1PLUS_SPEC "%{!frtti:-fno-rtti} \
 747     %{!fenforce-eh-specs:-fno-enforce-eh-specs} \
 748     %{!fexceptions:-fno-exceptions}"
 749 /* A C string constant that tells the GCC driver program options to
 750    pass to `cc1plus'.  */
 751
 752 #define ASM_SPEC "%{mmcu=avr25:-mmcu=avr2;mmcu=avr35:-mmcu=avr3;mmcu=avr31:-mmcu=avr3;mmcu=avr51:-mmcu=avr5;\
 753 mmcu=*:-mmcu=%*}"
 754
 755 #define LINK_SPEC "\
 756 %{mrelax:--relax\
 757          %{mpmem-wrap-around:%{mmcu=at90usb8*:--pmem-wrap-around=8k}\
 758                              %{mmcu=atmega16*:--pmem-wrap-around=16k}\
 759                              %{mmcu=atmega32*|\
 760                                mmcu=at90can32*:--pmem-wrap-around=32k}\
 761                              %{mmcu=atmega64*|\
 762                                mmcu=at90can64*|\
 763                                mmcu=at90usb64*:--pmem-wrap-around=64k}}}\
 764 %:device_to_arch(%{mmcu=*:%*})\
 765 %:device_to_data_start(%{mmcu=*:%*})"
 766
 767 #define LIB_SPEC \
 768   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lc }}}}}"
 769
 770 #define LIBSTDCXX "gcc"
 771 /* No libstdc++ for now.  Empty string doesn't work.  */
 772
 773 #define LIBGCC_SPEC \
 774   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lgcc }}}}}"
 775
 776 #define STARTFILE_SPEC "%:device_to_startfile(%{mmcu=*:%*})"
 777
 778 #define ENDFILE_SPEC ""
 779
 780 /* This is the default without any -mmcu=* option (AT90S*).  */
 781 #define MULTILIB_DEFAULTS { "mmcu=avr2" }
 782
 783 #define TEST_HARD_REG_CLASS(CLASS, REGNO) \
 784   TEST_HARD_REG_BIT (reg_class_contents[ (int) (CLASS)], REGNO)
 785
 786 /* Note that the other files fail to use these
 787    in some of the places where they should.  */
 788
 789 #if defined(__STDC__) || defined(ALMOST_STDC)
 790 #define AS2(a,b,c) #a " " #b "," #c
 791 #define AS2C(b,c) " " #b "," #c
 792 #define AS3(a,b,c,d) #a " " #b "," #c "," #d
 793 #define AS1(a,b) #a " " #b
 794 #else
 795 #define AS1(a,b) "a     b"
 796 #define AS2(a,b,c) "a   b,c"
 797 #define AS2C(b,c) " b,c"
 798 #define AS3(a,b,c,d) "a b,c,d"
 799 #endif
 800 #define OUT_AS1(a,b) output_asm_insn (AS1(a,b), operands)
 801 #define OUT_AS2(a,b,c) output_asm_insn (AS2(a,b,c), operands)
 802 #define CR_TAB "\n\t"
 803
 804 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 805
 806 #define DWARF2_DEBUGGING_INFO 1
 807
 808 #define DWARF2_ADDR_SIZE 4
 809
 810 #define OBJECT_FORMAT_ELF
 811
 812 #define HARD_REGNO_RENAME_OK(OLD_REG, NEW_REG) \
 813   avr_hard_regno_rename_ok (OLD_REG, NEW_REG)
 814
 815 /* A C structure for machine-specific, per-function data.
 816    This is added to the cfun structure.  */
 817 struct GTY(()) machine_function
 818 {
 819   /* 'true' - if current function is a naked function.  */
 820   int is_naked;
 821
 822   /* 'true' - if current function is an interrupt function
 823      as specified by the "interrupt" attribute.  */
 824   int is_interrupt;
 825
 826   /* 'true' - if current function is a signal function
 827      as specified by the "signal" attribute.  */
 828   int is_signal;
 829
 830   /* 'true' - if current function is a 'task' function
 831      as specified by the "OS_task" attribute.  */
 832   int is_OS_task;
 833
 834   /* 'true' - if current function is a 'main' function
 835      as specified by the "OS_main" attribute.  */
 836   int is_OS_main;
 837
 838   /* Current function stack size.  */
 839   int stack_usage;
 840 };