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 CAN_DEBUG_WITHOUT_FP
 128
 129 #define BITS_BIG_ENDIAN 0
 130 #define BYTES_BIG_ENDIAN 0
 131 #define WORDS_BIG_ENDIAN 0
 132
 133 #ifdef IN_LIBGCC2
 134 /* This is to get correct SI and DI modes in libgcc2.c (32 and 64 bits).  */
 135 #define UNITS_PER_WORD 4
 136 #else
 137 /* Width of a word, in units (bytes).  */
 138 #define UNITS_PER_WORD 1
 139 #endif
 140
 141 #define POINTER_SIZE 16
 142
 143
 144 /* Maximum sized of reasonable data type
 145    DImode or Dfmode ...  */
 146 #define MAX_FIXED_MODE_SIZE 32
 147
 148 #define PARM_BOUNDARY 8
 149
 150 #define FUNCTION_BOUNDARY 8
 151
 152 #define EMPTY_FIELD_BOUNDARY 8
 153
 154 /* No data type wants to be aligned rounder than this.  */
 155 #define BIGGEST_ALIGNMENT 8
 156
 157 #define MAX_OFILE_ALIGNMENT (32768 * 8)
 158
 159 #define TARGET_VTABLE_ENTRY_ALIGN 8
 160
 161 #define STRICT_ALIGNMENT 0
 162
 163 #define INT_TYPE_SIZE (TARGET_INT8 ? 8 : 16)
 164 #define SHORT_TYPE_SIZE (INT_TYPE_SIZE == 8 ? INT_TYPE_SIZE : 16)
 165 #define LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 16 : 32)
 166 #define LONG_LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 32 : 64)
 167 #define FLOAT_TYPE_SIZE 32
 168 #define DOUBLE_TYPE_SIZE 32
 169 #define LONG_DOUBLE_TYPE_SIZE 32
 170
 171 #define DEFAULT_SIGNED_CHAR 1
 172
 173 #define SIZE_TYPE (INT_TYPE_SIZE == 8 ? "long unsigned int" : "unsigned int")
 174 #define PTRDIFF_TYPE (INT_TYPE_SIZE == 8 ? "long int" :"int")
 175
 176 #define WCHAR_TYPE_SIZE 16
 177
 178 #define FIRST_PSEUDO_REGISTER 36
 179
 180 #define FIXED_REGISTERS {\
 181   1,1,/* r0 r1 */\
 182   0,0,/* r2 r3 */\
 183   0,0,/* r4 r5 */\
 184   0,0,/* r6 r7 */\
 185   0,0,/* r8 r9 */\
 186   0,0,/* r10 r11 */\
 187   0,0,/* r12 r13 */\
 188   0,0,/* r14 r15 */\
 189   0,0,/* r16 r17 */\
 190   0,0,/* r18 r19 */\
 191   0,0,/* r20 r21 */\
 192   0,0,/* r22 r23 */\
 193   0,0,/* r24 r25 */\
 194   0,0,/* r26 r27 */\
 195   0,0,/* r28 r29 */\
 196   0,0,/* r30 r31 */\
 197   1,1,/*  STACK */\
 198   1,1 /* arg pointer */  }
 199
 200 #define CALL_USED_REGISTERS {                   \
 201   1,1,/* r0 r1 */                               \
 202     0,0,/* r2 r3 */                             \
 203     0,0,/* r4 r5 */                             \
 204     0,0,/* r6 r7 */                             \
 205     0,0,/* r8 r9 */                             \
 206     0,0,/* r10 r11 */                           \
 207     0,0,/* r12 r13 */                           \
 208     0,0,/* r14 r15 */                           \
 209     0,0,/* r16 r17 */                           \
 210     1,1,/* r18 r19 */                           \
 211     1,1,/* r20 r21 */                           \
 212     1,1,/* r22 r23 */                           \
 213     1,1,/* r24 r25 */                           \
 214     1,1,/* r26 r27 */                           \
 215     0,0,/* r28 r29 */                           \
 216     1,1,/* r30 r31 */                           \
 217     1,1,/*  STACK */                            \
 218     1,1 /* arg pointer */  }
 219
 220 #define REG_ALLOC_ORDER {                       \
 221     24,25,                                      \
 222     18,19,                                      \
 223     20,21,                                      \
 224     22,23,                                      \
 225     30,31,                                      \
 226     26,27,                                      \
 227     28,29,                                      \
 228     17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,    \
 229     0,1,                                        \
 230     32,33,34,35                                 \
 231     }
 232
 233 #define ADJUST_REG_ALLOC_ORDER order_regs_for_local_alloc ()
 234
 235
 236 #define HARD_REGNO_NREGS(REGNO, MODE) ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
 237
 238 #define HARD_REGNO_MODE_OK(REGNO, MODE) avr_hard_regno_mode_ok(REGNO, MODE)
 239
 240 #define MODES_TIEABLE_P(MODE1, MODE2) 1
 241
 242 enum reg_class {
 243   NO_REGS,
 244   R0_REG,                       /* r0 */
 245   POINTER_X_REGS,               /* r26 - r27 */
 246   POINTER_Y_REGS,               /* r28 - r29 */
 247   POINTER_Z_REGS,               /* r30 - r31 */
 248   STACK_REG,                    /* STACK */
 249   BASE_POINTER_REGS,            /* r28 - r31 */
 250   POINTER_REGS,                 /* r26 - r31 */
 251   ADDW_REGS,                    /* r24 - r31 */
 252   SIMPLE_LD_REGS,               /* r16 - r23 */
 253   LD_REGS,                      /* r16 - r31 */
 254   NO_LD_REGS,                   /* r0 - r15 */
 255   GENERAL_REGS,                 /* r0 - r31 */
 256   ALL_REGS, LIM_REG_CLASSES
 257 };
 258
 259
 260 #define N_REG_CLASSES (int)LIM_REG_CLASSES
 261
 262 #define REG_CLASS_NAMES {                                       \
 263                  "NO_REGS",                                     \
 264                    "R0_REG",    /* r0 */                        \
 265                    "POINTER_X_REGS", /* r26 - r27 */            \
 266                    "POINTER_Y_REGS", /* r28 - r29 */            \
 267                    "POINTER_Z_REGS", /* r30 - r31 */            \
 268                    "STACK_REG", /* STACK */                     \
 269                    "BASE_POINTER_REGS", /* r28 - r31 */         \
 270                    "POINTER_REGS", /* r26 - r31 */              \
 271                    "ADDW_REGS", /* r24 - r31 */                 \
 272                    "SIMPLE_LD_REGS", /* r16 - r23 */            \
 273                    "LD_REGS",   /* r16 - r31 */                 \
 274                    "NO_LD_REGS", /* r0 - r15 */                 \
 275                    "GENERAL_REGS", /* r0 - r31 */               \
 276                    "ALL_REGS" }
 277
 278 #define REG_CLASS_CONTENTS {                                            \
 279   {0x00000000,0x00000000},      /* NO_REGS */                           \
 280   {0x00000001,0x00000000},      /* R0_REG */                            \
 281   {3 << REG_X,0x00000000},      /* POINTER_X_REGS, r26 - r27 */         \
 282   {3 << REG_Y,0x00000000},      /* POINTER_Y_REGS, r28 - r29 */         \
 283   {3 << REG_Z,0x00000000},      /* POINTER_Z_REGS, r30 - r31 */         \
 284   {0x00000000,0x00000003},      /* STACK_REG, STACK */                  \
 285   {(3 << REG_Y) | (3 << REG_Z),                                         \
 286      0x00000000},               /* BASE_POINTER_REGS, r28 - r31 */      \
 287   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z),                          \
 288      0x00000000},               /* POINTER_REGS, r26 - r31 */           \
 289   {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z) | (3 << REG_W),           \
 290      0x00000000},               /* ADDW_REGS, r24 - r31 */              \
 291   {0x00ff0000,0x00000000},      /* SIMPLE_LD_REGS r16 - r23 */          \
 292   {(3 << REG_X)|(3 << REG_Y)|(3 << REG_Z)|(3 << REG_W)|(0xff << 16),    \
 293      0x00000000},       /* LD_REGS, r16 - r31 */                        \
 294   {0x0000ffff,0x00000000},      /* NO_LD_REGS  r0 - r15 */              \
 295   {0xffffffff,0x00000000},      /* GENERAL_REGS, r0 - r31 */            \
 296   {0xffffffff,0x00000003}       /* ALL_REGS */                          \
 297 }
 298
 299 #define REGNO_REG_CLASS(R) avr_regno_reg_class(R)
 300
 301 /* The following macro defines cover classes for Integrated Register
 302    Allocator.  Cover classes is a set of non-intersected register
 303    classes covering all hard registers used for register allocation
 304    purpose.  Any move between two registers of a cover class should be
 305    cheaper than load or store of the registers.  The macro value is
 306    array of register classes with LIM_REG_CLASSES used as the end
 307    marker.  */
 308
 309 #define IRA_COVER_CLASSES               \
 310 {                                       \
 311   GENERAL_REGS, LIM_REG_CLASSES         \
 312 }
 313
 314 #define BASE_REG_CLASS (reload_completed ? BASE_POINTER_REGS : POINTER_REGS)
 315
 316 #define INDEX_REG_CLASS NO_REGS
 317
 318 #define REGNO_OK_FOR_BASE_P(r) (((r) < FIRST_PSEUDO_REGISTER            \
 319                                  && ((r) == REG_X                       \
 320                                      || (r) == REG_Y                    \
 321                                      || (r) == REG_Z                    \
 322                                      || (r) == ARG_POINTER_REGNUM))     \
 323                                 || (reg_renumber                        \
 324                                     && (reg_renumber[r] == REG_X        \
 325                                         || reg_renumber[r] == REG_Y     \
 326                                         || reg_renumber[r] == REG_Z     \
 327                                         || (reg_renumber[r]             \
 328                                             == ARG_POINTER_REGNUM))))
 329
 330 #define REGNO_OK_FOR_INDEX_P(NUM) 0
 331
 332 #define PREFERRED_RELOAD_CLASS(X, CLASS) preferred_reload_class(X,CLASS)
 333
 334 #define TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P hook_bool_mode_true
 335
 336 #define CLASS_LIKELY_SPILLED_P(c) class_likely_spilled_p(c)
 337
 338 #define CLASS_MAX_NREGS(CLASS, MODE)   class_max_nregs (CLASS, MODE)
 339
 340 #define STACK_PUSH_CODE POST_DEC
 341
 342 #define STACK_GROWS_DOWNWARD
 343
 344 #define STARTING_FRAME_OFFSET 1
 345
 346 #define STACK_POINTER_OFFSET 1
 347
 348 #define FIRST_PARM_OFFSET(FUNDECL) 0
 349
 350 #define STACK_BOUNDARY 8
 351
 352 #define STACK_POINTER_REGNUM 32
 353
 354 #define FRAME_POINTER_REGNUM REG_Y
 355
 356 #define ARG_POINTER_REGNUM 34
 357
 358 #define STATIC_CHAIN_REGNUM 2
 359
 360 /* Offset from the frame pointer register value to the top of the stack.  */
 361 #define FRAME_POINTER_CFA_OFFSET(FNDECL) 0
 362
 363 #define ELIMINABLE_REGS {                                       \
 364       {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},               \
 365         {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}            \
 366        ,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}}
 367
 368 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                    \
 369   OFFSET = avr_initial_elimination_offset (FROM, TO)
 370
 371 #define RETURN_ADDR_RTX(count, tem) avr_return_addr_rtx (count, tem)
 372
 373 /* Don't use Push rounding. expr.c: emit_single_push_insn is broken
 374    for POST_DEC targets (PR27386).  */
 375 /*#define PUSH_ROUNDING(NPUSHED) (NPUSHED)*/
 376
 377 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) (function_arg (&(CUM), MODE, TYPE, NAMED))
 378
 379 typedef struct avr_args {
 380   int nregs;                    /* # registers available for passing */
 381   int regno;                    /* next available register number */
 382 } CUMULATIVE_ARGS;
 383
 384 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
 385   init_cumulative_args (&(CUM), FNTYPE, LIBNAME, FNDECL)
 386
 387 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)    \
 388   (function_arg_advance (&CUM, MODE, TYPE, NAMED))
 389
 390 #define FUNCTION_ARG_REGNO_P(r) function_arg_regno_p(r)
 391
 392 extern int avr_reg_order[];
 393
 394 #define RET_REGISTER avr_ret_register ()
 395
 396 #define LIBCALL_VALUE(MODE)  avr_libcall_value (MODE)
 397
 398 #define FUNCTION_VALUE_REGNO_P(N) ((int) (N) == RET_REGISTER)
 399
 400 #define DEFAULT_PCC_STRUCT_RETURN 0
 401
 402 #define EPILOGUE_USES(REGNO) avr_epilogue_uses(REGNO)
 403
 404 #define HAVE_POST_INCREMENT 1
 405 #define HAVE_PRE_DECREMENT 1
 406
 407 #define MAX_REGS_PER_ADDRESS 1
 408
 409 #define REG_OK_FOR_BASE_NOSTRICT_P(X) \
 410   (REGNO (X) >= FIRST_PSEUDO_REGISTER || REG_OK_FOR_BASE_STRICT_P(X))
 411
 412 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
 413
 414 /* LEGITIMIZE_RELOAD_ADDRESS will allow register R26/27 to be used, where it
 415    is no worse than normal base pointers R28/29 and R30/31. For example:
 416    If base offset is greater than 63 bytes or for R++ or --R addressing.  */
 417
 418 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN)    \
 419 do {                                                                        \
 420   if (1&&(GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC))     \
 421     {                                                                       \
 422       push_reload (XEXP (X,0), XEXP (X,0), &XEXP (X,0), &XEXP (X,0),        \
 423                    POINTER_REGS, GET_MODE (X),GET_MODE (X) , 0, 0,          \
 424                    OPNUM, RELOAD_OTHER);                                    \
 425       goto WIN;                                                             \
 426     }                                                                       \
 427   if (GET_CODE (X) == PLUS                                                  \
 428       && REG_P (XEXP (X, 0))                                                \
 429       && reg_equiv_constant[REGNO (XEXP (X, 0))] == 0                       \
 430       && GET_CODE (XEXP (X, 1)) == CONST_INT                                \
 431       && INTVAL (XEXP (X, 1)) >= 1)                                         \
 432     {                                                                       \
 433       int fit = INTVAL (XEXP (X, 1)) <= (64 - GET_MODE_SIZE (MODE));        \
 434       if (fit)                                                              \
 435         {                                                                   \
 436           if (reg_equiv_address[REGNO (XEXP (X, 0))] != 0)                  \
 437             {                                                               \
 438               int regno = REGNO (XEXP (X, 0));                              \
 439               rtx mem = make_memloc (X, regno);                             \
 440               push_reload (XEXP (mem,0), NULL, &XEXP (mem,0), NULL,         \
 441                            POINTER_REGS, Pmode, VOIDmode, 0, 0,             \
 442                            1, ADDR_TYPE (TYPE));                            \
 443               push_reload (mem, NULL_RTX, &XEXP (X, 0), NULL,               \
 444                            BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
 445                            OPNUM, TYPE);                                    \
 446               goto WIN;                                                     \
 447             }                                                               \
 448         }                                                                   \
 449       else if (! (frame_pointer_needed && XEXP (X,0) == frame_pointer_rtx)) \
 450         {                                                                   \
 451           push_reload (X, NULL_RTX, &X, NULL,                               \
 452                        POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0,          \
 453                        OPNUM, TYPE);                                        \
 454           goto WIN;                                                         \
 455         }                                                                   \
 456     }                                                                       \
 457 } while(0)
 458
 459 #define LEGITIMATE_CONSTANT_P(X) 1
 460
 461 #define REGISTER_MOVE_COST(MODE, FROM, TO) ((FROM) == STACK_REG ? 6 \
 462                                             : (TO) == STACK_REG ? 12 \
 463                                             : 2)
 464
 465 #define MEMORY_MOVE_COST(MODE,CLASS,IN) ((MODE)==QImode ? 2 :   \
 466                                          (MODE)==HImode ? 4 :   \
 467                                          (MODE)==SImode ? 8 :   \
 468                                          (MODE)==SFmode ? 8 : 16)
 469
 470 #define BRANCH_COST(speed_p, predictable_p) 0
 471
 472 #define SLOW_BYTE_ACCESS 0
 473
 474 #define NO_FUNCTION_CSE
 475
 476 #define TEXT_SECTION_ASM_OP "\t.text"
 477
 478 #define DATA_SECTION_ASM_OP "\t.data"
 479
 480 #define BSS_SECTION_ASM_OP "\t.section .bss"
 481
 482 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
 483    There are no shared libraries on this target, and these sections are
 484    placed in the read-only program memory, so they are not writable.  */
 485
 486 #undef CTORS_SECTION_ASM_OP
 487 #define CTORS_SECTION_ASM_OP "\t.section .ctors,\"a\",@progbits"
 488
 489 #undef DTORS_SECTION_ASM_OP
 490 #define DTORS_SECTION_ASM_OP "\t.section .dtors,\"a\",@progbits"
 491
 492 #define TARGET_ASM_CONSTRUCTOR avr_asm_out_ctor
 493
 494 #define TARGET_ASM_DESTRUCTOR avr_asm_out_dtor
 495
 496 #define SUPPORTS_INIT_PRIORITY 0
 497
 498 #define JUMP_TABLES_IN_TEXT_SECTION 0
 499
 500 #define ASM_COMMENT_START " ; "
 501
 502 #define ASM_APP_ON "/* #APP */\n"
 503
 504 #define ASM_APP_OFF "/* #NOAPP */\n"
 505
 506 /* Switch into a generic section.  */
 507 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
 508 #define TARGET_ASM_INIT_SECTIONS avr_asm_init_sections
 509
 510 #define ASM_OUTPUT_ASCII(FILE, P, SIZE)  gas_output_ascii (FILE,P,SIZE)
 511
 512 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C, STR) ((C) == '\n' || ((C) == '$'))
 513
 514 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)                     \
 515 do {                                                                       \
 516      fputs ("\t.comm ", (STREAM));                                         \
 517      assemble_name ((STREAM), (NAME));                                     \
 518      fprintf ((STREAM), ",%lu,1\n", (unsigned long)(SIZE));                \
 519 } while (0)
 520
 521 #define ASM_OUTPUT_BSS(FILE, DECL, NAME, SIZE, ROUNDED)                 \
 522   asm_output_bss ((FILE), (DECL), (NAME), (SIZE), (ROUNDED))
 523
 524 #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED)                   \
 525 do {                                                                    \
 526      fputs ("\t.lcomm ", (STREAM));                                     \
 527      assemble_name ((STREAM), (NAME));                                  \
 528      fprintf ((STREAM), ",%d\n", (int)(SIZE));                          \
 529 } while (0)
 530
 531 #undef TYPE_ASM_OP
 532 #undef SIZE_ASM_OP
 533 #undef WEAK_ASM_OP
 534 #define TYPE_ASM_OP     "\t.type\t"
 535 #define SIZE_ASM_OP     "\t.size\t"
 536 #define WEAK_ASM_OP     "\t.weak\t"
 537 /* Define the strings used for the special svr4 .type and .size directives.
 538    These strings generally do not vary from one system running svr4 to
 539    another, but if a given system (e.g. m88k running svr) needs to use
 540    different pseudo-op names for these, they may be overridden in the
 541    file which includes this one.  */
 542
 543
 544 #undef TYPE_OPERAND_FMT
 545 #define TYPE_OPERAND_FMT        "@%s"
 546 /* The following macro defines the format used to output the second
 547    operand of the .type assembler directive.  Different svr4 assemblers
 548    expect various different forms for this operand.  The one given here
 549    is just a default.  You may need to override it in your machine-
 550    specific tm.h file (depending upon the particulars of your assembler).  */
 551
 552 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 553 avr_asm_declare_function_name ((FILE), (NAME), (DECL))
 554
 555 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)                    \
 556   do {                                                                  \
 557     if (!flag_inhibit_size_directive)                                   \
 558       ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                           \
 559   } while (0)
 560
 561 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 562 do {                                                                    \
 563   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");                     \
 564   size_directive_output = 0;                                            \
 565   if (!flag_inhibit_size_directive && DECL_SIZE (DECL))                 \
 566     {                                                                   \
 567       size_directive_output = 1;                                        \
 568       ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME,                            \
 569                                  int_size_in_bytes (TREE_TYPE (DECL))); \
 570     }                                                                   \
 571   ASM_OUTPUT_LABEL(FILE, NAME);                                         \
 572 } while (0)
 573
 574 #undef ASM_FINISH_DECLARE_OBJECT
 575 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)         \
 576 do {                                                                     \
 577      const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);             \
 578      HOST_WIDE_INT size;                                                 \
 579      if (!flag_inhibit_size_directive && DECL_SIZE (DECL)                \
 580          && ! AT_END && TOP_LEVEL                                        \
 581          && DECL_INITIAL (DECL) == error_mark_node                       \
 582          && !size_directive_output)                                      \
 583        {                                                                 \
 584          size_directive_output = 1;                                      \
 585          size = int_size_in_bytes (TREE_TYPE (DECL));                    \
 586          ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size);                   \
 587        }                                                                 \
 588    } while (0)
 589
 590
 591 #define ESCAPES \
 592 "\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\
 593 \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\
 594 \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\
 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\1\
 596 \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\
 597 \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\
 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 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
 601    ASM_OUTPUT_LIMITED_STRING macros.  Each byte in the table
 602    corresponds to a particular byte value [0..255].  For any
 603    given byte value, if the value in the corresponding table
 604    position is zero, the given character can be output directly.
 605    If the table value is 1, the byte must be output as a \ooo
 606    octal escape.  If the tables value is anything else, then the
 607    byte value should be output as a \ followed by the value
 608    in the table.  Note that we can use standard UN*X escape
 609    sequences for many control characters, but we don't use
 610    \a to represent BEL because some svr4 assemblers (e.g. on
 611    the i386) don't know about that.  Also, we don't use \v
 612    since some versions of gas, such as 2.2 did not accept it.  */
 613
 614 #define STRING_LIMIT    ((unsigned) 64)
 615 #define STRING_ASM_OP   "\t.string\t"
 616 /* Some svr4 assemblers have a limit on the number of characters which
 617    can appear in the operand of a .string directive.  If your assembler
 618    has such a limitation, you should define STRING_LIMIT to reflect that
 619    limit.  Note that at least some svr4 assemblers have a limit on the
 620    actual number of bytes in the double-quoted string, and that they
 621    count each character in an escape sequence as one byte.  Thus, an
 622    escape sequence like \377 would count as four bytes.
 623
 624    If your target assembler doesn't support the .string directive, you
 625    should define this to zero.  */
 626
 627 /* Globalizing directive for a label.  */
 628 #define GLOBAL_ASM_OP ".global\t"
 629
 630 #define SET_ASM_OP      "\t.set\t"
 631
 632 #define ASM_WEAKEN_LABEL(FILE, NAME)    \
 633   do                                    \
 634     {                                   \
 635       fputs ("\t.weak\t", (FILE));      \
 636       assemble_name ((FILE), (NAME));   \
 637       fputc ('\n', (FILE));             \
 638     }                                   \
 639   while (0)
 640
 641 #define SUPPORTS_WEAK 1
 642
 643 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)        \
 644 sprintf (STRING, "*.%s%lu", PREFIX, (unsigned long)(NUM))
 645
 646 #define HAS_INIT_SECTION 1
 647
 648 #define REGISTER_NAMES {                                \
 649   "r0","r1","r2","r3","r4","r5","r6","r7",              \
 650     "r8","r9","r10","r11","r12","r13","r14","r15",      \
 651     "r16","r17","r18","r19","r20","r21","r22","r23",    \
 652     "r24","r25","r26","r27","r28","r29","r30","r31",    \
 653     "__SP_L__","__SP_H__","argL","argH"}
 654
 655 #define FINAL_PRESCAN_INSN(insn, operand, nop) final_prescan_insn (insn, operand,nop)
 656
 657 #define PRINT_OPERAND(STREAM, X, CODE) print_operand (STREAM, X, CODE)
 658
 659 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '~' || (CODE) == '!')
 660
 661 #define PRINT_OPERAND_ADDRESS(STREAM, X) print_operand_address(STREAM, X)
 662
 663 #define USER_LABEL_PREFIX ""
 664
 665 #define ASSEMBLER_DIALECT AVR_HAVE_MOVW
 666
 667 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO)      \
 668 {                                               \
 669   gcc_assert (REGNO < 32);                      \
 670   fprintf (STREAM, "\tpush\tr%d", REGNO);       \
 671 }
 672
 673 #define ASM_OUTPUT_REG_POP(STREAM, REGNO)       \
 674 {                                               \
 675   gcc_assert (REGNO < 32);                      \
 676   fprintf (STREAM, "\tpop\tr%d", REGNO);        \
 677 }
 678
 679 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)          \
 680   avr_output_addr_vec_elt(STREAM, VALUE)
 681
 682 #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) \
 683   (switch_to_section (progmem_section), \
 684    (*targetm.asm_out.internal_label) (STREAM, PREFIX, NUM))
 685
 686 #define ASM_OUTPUT_SKIP(STREAM, N)              \
 687 fprintf (STREAM, "\t.skip %lu,0\n", (unsigned long)(N))
 688
 689 #define ASM_OUTPUT_ALIGN(STREAM, POWER)                 \
 690   do {                                                  \
 691       if ((POWER) > 1)                                  \
 692           fprintf (STREAM, "\t.p2align\t%d\n", POWER);  \
 693   } while (0)
 694
 695 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
 696   default_elf_asm_output_external (FILE, DECL, NAME)
 697
 698 #define CASE_VECTOR_MODE HImode
 699
 700 #undef WORD_REGISTER_OPERATIONS
 701
 702 #define MOVE_MAX 4
 703
 704 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
 705
 706 #define Pmode HImode
 707
 708 #define FUNCTION_MODE HImode
 709
 710 #define DOLLARS_IN_IDENTIFIERS 0
 711
 712 #define NO_DOLLAR_IN_LABEL 1
 713
 714 #define TRAMPOLINE_SIZE 4
 715
 716 /* Store in cc_status the expressions
 717    that the condition codes will describe
 718    after execution of an instruction whose pattern is EXP.
 719    Do not alter them if the instruction would not alter the cc's.  */
 720
 721 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
 722
 723 /* The add insns don't set overflow in a usable way.  */
 724 #define CC_OVERFLOW_UNUSABLE 01000
 725 /* The mov,and,or,xor insns don't set carry.  That's ok though as the
 726    Z bit is all we need when doing unsigned comparisons on the result of
 727    these insns (since they're always with 0).  However, conditions.h has
 728    CC_NO_OVERFLOW defined for this purpose.  Rename it to something more
 729    understandable.  */
 730 #define CC_NO_CARRY CC_NO_OVERFLOW
 731
 732
 733 /* Output assembler code to FILE to increment profiler label # LABELNO
 734    for profiling a function entry.  */
 735
 736 #define FUNCTION_PROFILER(FILE, LABELNO)  \
 737   fprintf (FILE, "/* profiler %d */", (LABELNO))
 738
 739 #define ADJUST_INSN_LENGTH(INSN, LENGTH) (LENGTH =\
 740                                           adjust_insn_length (INSN, LENGTH))
 741
 742 extern const char *avr_device_to_arch (int argc, const char **argv);
 743 extern const char *avr_device_to_data_start (int argc, const char **argv);
 744 extern const char *avr_device_to_startfiles (int argc, const char **argv);
 745 extern const char *avr_device_to_devicelib (int argc, const char **argv);
 746
 747 #define EXTRA_SPEC_FUNCTIONS \
 748   { "device_to_arch", avr_device_to_arch }, \
 749   { "device_to_data_start", avr_device_to_data_start }, \
 750   { "device_to_startfile", avr_device_to_startfiles }, \
 751   { "device_to_devicelib", avr_device_to_devicelib },
 752
 753 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE}"
 754
 755 #define CC1_SPEC "%{profile:-p}"
 756
 757 #define CC1PLUS_SPEC "%{!frtti:-fno-rtti} \
 758     %{!fenforce-eh-specs:-fno-enforce-eh-specs} \
 759     %{!fexceptions:-fno-exceptions}"
 760 /* A C string constant that tells the GCC driver program options to
 761    pass to `cc1plus'.  */
 762
 763 #define ASM_SPEC "%{mmcu=avr25:-mmcu=avr2;mmcu=avr35:-mmcu=avr3;mmcu=avr31:-mmcu=avr3;mmcu=avr51:-mmcu=avr5;\
 764 mmcu=*:-mmcu=%*}"
 765
 766 #define LINK_SPEC "\
 767 %{mrelax:--relax\
 768          %{mpmem-wrap-around:%{mmcu=at90usb8*:--pmem-wrap-around=8k}\
 769                              %{mmcu=atmega16*:--pmem-wrap-around=16k}\
 770                              %{mmcu=atmega32*|\
 771                                mmcu=at90can32*:--pmem-wrap-around=32k}\
 772                              %{mmcu=atmega64*|\
 773                                mmcu=at90can64*|\
 774                                mmcu=at90usb64*:--pmem-wrap-around=64k}}}\
 775 %:device_to_arch(%{mmcu=*:%*})\
 776 %:device_to_data_start(%{mmcu=*:%*})"
 777
 778 #define LIB_SPEC \
 779   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lc }}}}}"
 780
 781 #define LIBSTDCXX "gcc"
 782 /* No libstdc++ for now.  Empty string doesn't work.  */
 783
 784 #define LIBGCC_SPEC \
 785   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lgcc }}}}}"
 786
 787 #define STARTFILE_SPEC "%:device_to_startfile(%{mmcu=*:%*})"
 788
 789 #define ENDFILE_SPEC ""
 790
 791 /* This is the default without any -mmcu=* option (AT90S*).  */
 792 #define MULTILIB_DEFAULTS { "mmcu=avr2" }
 793
 794 #define TEST_HARD_REG_CLASS(CLASS, REGNO) \
 795   TEST_HARD_REG_BIT (reg_class_contents[ (int) (CLASS)], REGNO)
 796
 797 /* Note that the other files fail to use these
 798    in some of the places where they should.  */
 799
 800 #if defined(__STDC__) || defined(ALMOST_STDC)
 801 #define AS2(a,b,c) #a " " #b "," #c
 802 #define AS2C(b,c) " " #b "," #c
 803 #define AS3(a,b,c,d) #a " " #b "," #c "," #d
 804 #define AS1(a,b) #a " " #b
 805 #else
 806 #define AS1(a,b) "a     b"
 807 #define AS2(a,b,c) "a   b,c"
 808 #define AS2C(b,c) " b,c"
 809 #define AS3(a,b,c,d) "a b,c,d"
 810 #endif
 811 #define OUT_AS1(a,b) output_asm_insn (AS1(a,b), operands)
 812 #define OUT_AS2(a,b,c) output_asm_insn (AS2(a,b,c), operands)
 813 #define CR_TAB "\n\t"
 814
 815 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 816
 817 #define DWARF2_DEBUGGING_INFO 1
 818
 819 #define DWARF2_ADDR_SIZE 4
 820
 821 #define OBJECT_FORMAT_ELF
 822
 823 #define HARD_REGNO_RENAME_OK(OLD_REG, NEW_REG) \
 824   avr_hard_regno_rename_ok (OLD_REG, NEW_REG)
 825
 826 /* A C structure for machine-specific, per-function data.
 827    This is added to the cfun structure.  */
 828 struct GTY(()) machine_function
 829 {
 830   /* 'true' - if current function is a naked function.  */
 831   int is_naked;
 832
 833   /* 'true' - if current function is an interrupt function
 834      as specified by the "interrupt" attribute.  */
 835   int is_interrupt;
 836
 837   /* 'true' - if current function is a signal function
 838      as specified by the "signal" attribute.  */
 839   int is_signal;
 840
 841   /* 'true' - if current function is a 'task' function
 842      as specified by the "OS_task" attribute.  */
 843   int is_OS_task;
 844
 845   /* 'true' - if current function is a 'main' function
 846      as specified by the "OS_main" attribute.  */
 847   int is_OS_main;
 848
 849   /* Current function stack size.  */
 850   int stack_usage;
 851 };