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 DEFAULT_PCC_STRUCT_RETURN 0
 384
 385 #define EPILOGUE_USES(REGNO) avr_epilogue_uses(REGNO)
 386
 387 #define HAVE_POST_INCREMENT 1
 388 #define HAVE_PRE_DECREMENT 1
 389
 390 #define MAX_REGS_PER_ADDRESS 1
 391
 392 #define REG_OK_FOR_BASE_NOSTRICT_P(X) \
 393   (REGNO (X) >= FIRST_PSEUDO_REGISTER || REG_OK_FOR_BASE_STRICT_P(X))
 394
 395 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
 396
 397 /* LEGITIMIZE_RELOAD_ADDRESS will allow register R26/27 to be used, where it
 398    is no worse than normal base pointers R28/29 and R30/31. For example:
 399    If base offset is greater than 63 bytes or for R++ or --R addressing.  */
 400
 401 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN)    \
 402 do {                                                                        \
 403   if (1&&(GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC))     \
 404     {                                                                       \
 405       push_reload (XEXP (X,0), XEXP (X,0), &XEXP (X,0), &XEXP (X,0),        \
 406                    POINTER_REGS, GET_MODE (X),GET_MODE (X) , 0, 0,          \
 407                    OPNUM, RELOAD_OTHER);                                    \
 408       goto WIN;                                                             \
 409     }                                                                       \
 410   if (GET_CODE (X) == PLUS                                                  \
 411       && REG_P (XEXP (X, 0))                                                \
 412       && reg_equiv_constant[REGNO (XEXP (X, 0))] == 0                       \
 413       && GET_CODE (XEXP (X, 1)) == CONST_INT                                \
 414       && INTVAL (XEXP (X, 1)) >= 1)                                         \
 415     {                                                                       \
 416       int fit = INTVAL (XEXP (X, 1)) <= (64 - GET_MODE_SIZE (MODE));        \
 417       if (fit)                                                              \
 418         {                                                                   \
 419           if (reg_equiv_address[REGNO (XEXP (X, 0))] != 0)                  \
 420             {                                                               \
 421               int regno = REGNO (XEXP (X, 0));                              \
 422               rtx mem = make_memloc (X, regno);                             \
 423               push_reload (XEXP (mem,0), NULL, &XEXP (mem,0), NULL,         \
 424                            POINTER_REGS, Pmode, VOIDmode, 0, 0,             \
 425                            1, ADDR_TYPE (TYPE));                            \
 426               push_reload (mem, NULL_RTX, &XEXP (X, 0), NULL,               \
 427                            BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
 428                            OPNUM, TYPE);                                    \
 429               goto WIN;                                                     \
 430             }                                                               \
 431         }                                                                   \
 432       else if (! (frame_pointer_needed && XEXP (X,0) == frame_pointer_rtx)) \
 433         {                                                                   \
 434           push_reload (X, NULL_RTX, &X, NULL,                               \
 435                        POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0,          \
 436                        OPNUM, TYPE);                                        \
 437           goto WIN;                                                         \
 438         }                                                                   \
 439     }                                                                       \
 440 } while(0)
 441
 442 #define LEGITIMATE_CONSTANT_P(X) 1
 443
 444 #define BRANCH_COST(speed_p, predictable_p) 0
 445
 446 #define SLOW_BYTE_ACCESS 0
 447
 448 #define NO_FUNCTION_CSE
 449
 450 #define TEXT_SECTION_ASM_OP "\t.text"
 451
 452 #define DATA_SECTION_ASM_OP "\t.data"
 453
 454 #define BSS_SECTION_ASM_OP "\t.section .bss"
 455
 456 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
 457    There are no shared libraries on this target, and these sections are
 458    placed in the read-only program memory, so they are not writable.  */
 459
 460 #undef CTORS_SECTION_ASM_OP
 461 #define CTORS_SECTION_ASM_OP "\t.section .ctors,\"a\",@progbits"
 462
 463 #undef DTORS_SECTION_ASM_OP
 464 #define DTORS_SECTION_ASM_OP "\t.section .dtors,\"a\",@progbits"
 465
 466 #define TARGET_ASM_CONSTRUCTOR avr_asm_out_ctor
 467
 468 #define TARGET_ASM_DESTRUCTOR avr_asm_out_dtor
 469
 470 #define SUPPORTS_INIT_PRIORITY 0
 471
 472 #define JUMP_TABLES_IN_TEXT_SECTION 0
 473
 474 #define ASM_COMMENT_START " ; "
 475
 476 #define ASM_APP_ON "/* #APP */\n"
 477
 478 #define ASM_APP_OFF "/* #NOAPP */\n"
 479
 480 /* Switch into a generic section.  */
 481 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
 482 #define TARGET_ASM_INIT_SECTIONS avr_asm_init_sections
 483
 484 #define ASM_OUTPUT_ASCII(FILE, P, SIZE)  gas_output_ascii (FILE,P,SIZE)
 485
 486 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C, STR) ((C) == '\n' || ((C) == '$'))
 487
 488 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)                     \
 489 do {                                                                       \
 490      fputs ("\t.comm ", (STREAM));                                         \
 491      assemble_name ((STREAM), (NAME));                                     \
 492      fprintf ((STREAM), ",%lu,1\n", (unsigned long)(SIZE));                \
 493 } while (0)
 494
 495 #define ASM_OUTPUT_BSS(FILE, DECL, NAME, SIZE, ROUNDED)                 \
 496   asm_output_bss ((FILE), (DECL), (NAME), (SIZE), (ROUNDED))
 497
 498 #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED)                   \
 499 do {                                                                    \
 500      fputs ("\t.lcomm ", (STREAM));                                     \
 501      assemble_name ((STREAM), (NAME));                                  \
 502      fprintf ((STREAM), ",%d\n", (int)(SIZE));                          \
 503 } while (0)
 504
 505 #undef TYPE_ASM_OP
 506 #undef SIZE_ASM_OP
 507 #undef WEAK_ASM_OP
 508 #define TYPE_ASM_OP     "\t.type\t"
 509 #define SIZE_ASM_OP     "\t.size\t"
 510 #define WEAK_ASM_OP     "\t.weak\t"
 511 /* Define the strings used for the special svr4 .type and .size directives.
 512    These strings generally do not vary from one system running svr4 to
 513    another, but if a given system (e.g. m88k running svr) needs to use
 514    different pseudo-op names for these, they may be overridden in the
 515    file which includes this one.  */
 516
 517
 518 #undef TYPE_OPERAND_FMT
 519 #define TYPE_OPERAND_FMT        "@%s"
 520 /* The following macro defines the format used to output the second
 521    operand of the .type assembler directive.  Different svr4 assemblers
 522    expect various different forms for this operand.  The one given here
 523    is just a default.  You may need to override it in your machine-
 524    specific tm.h file (depending upon the particulars of your assembler).  */
 525
 526 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 527 avr_asm_declare_function_name ((FILE), (NAME), (DECL))
 528
 529 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)                    \
 530   do {                                                                  \
 531     if (!flag_inhibit_size_directive)                                   \
 532       ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                           \
 533   } while (0)
 534
 535 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 536 do {                                                                    \
 537   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");                     \
 538   size_directive_output = 0;                                            \
 539   if (!flag_inhibit_size_directive && DECL_SIZE (DECL))                 \
 540     {                                                                   \
 541       size_directive_output = 1;                                        \
 542       ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME,                            \
 543                                  int_size_in_bytes (TREE_TYPE (DECL))); \
 544     }                                                                   \
 545   ASM_OUTPUT_LABEL(FILE, NAME);                                         \
 546 } while (0)
 547
 548 #undef ASM_FINISH_DECLARE_OBJECT
 549 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)         \
 550 do {                                                                     \
 551      const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);             \
 552      HOST_WIDE_INT size;                                                 \
 553      if (!flag_inhibit_size_directive && DECL_SIZE (DECL)                \
 554          && ! AT_END && TOP_LEVEL                                        \
 555          && DECL_INITIAL (DECL) == error_mark_node                       \
 556          && !size_directive_output)                                      \
 557        {                                                                 \
 558          size_directive_output = 1;                                      \
 559          size = int_size_in_bytes (TREE_TYPE (DECL));                    \
 560          ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size);                   \
 561        }                                                                 \
 562    } while (0)
 563
 564
 565 #define ESCAPES \
 566 "\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\
 567 \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\
 568 \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\
 569 \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\
 570 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 571 \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\
 572 \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\
 573 \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"
 574 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
 575    ASM_OUTPUT_LIMITED_STRING macros.  Each byte in the table
 576    corresponds to a particular byte value [0..255].  For any
 577    given byte value, if the value in the corresponding table
 578    position is zero, the given character can be output directly.
 579    If the table value is 1, the byte must be output as a \ooo
 580    octal escape.  If the tables value is anything else, then the
 581    byte value should be output as a \ followed by the value
 582    in the table.  Note that we can use standard UN*X escape
 583    sequences for many control characters, but we don't use
 584    \a to represent BEL because some svr4 assemblers (e.g. on
 585    the i386) don't know about that.  Also, we don't use \v
 586    since some versions of gas, such as 2.2 did not accept it.  */
 587
 588 #define STRING_LIMIT    ((unsigned) 64)
 589 #define STRING_ASM_OP   "\t.string\t"
 590 /* Some svr4 assemblers have a limit on the number of characters which
 591    can appear in the operand of a .string directive.  If your assembler
 592    has such a limitation, you should define STRING_LIMIT to reflect that
 593    limit.  Note that at least some svr4 assemblers have a limit on the
 594    actual number of bytes in the double-quoted string, and that they
 595    count each character in an escape sequence as one byte.  Thus, an
 596    escape sequence like \377 would count as four bytes.
 597
 598    If your target assembler doesn't support the .string directive, you
 599    should define this to zero.  */
 600
 601 /* Globalizing directive for a label.  */
 602 #define GLOBAL_ASM_OP ".global\t"
 603
 604 #define SET_ASM_OP      "\t.set\t"
 605
 606 #define ASM_WEAKEN_LABEL(FILE, NAME)    \
 607   do                                    \
 608     {                                   \
 609       fputs ("\t.weak\t", (FILE));      \
 610       assemble_name ((FILE), (NAME));   \
 611       fputc ('\n', (FILE));             \
 612     }                                   \
 613   while (0)
 614
 615 #define SUPPORTS_WEAK 1
 616
 617 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)        \
 618 sprintf (STRING, "*.%s%lu", PREFIX, (unsigned long)(NUM))
 619
 620 #define HAS_INIT_SECTION 1
 621
 622 #define REGISTER_NAMES {                                \
 623   "r0","r1","r2","r3","r4","r5","r6","r7",              \
 624     "r8","r9","r10","r11","r12","r13","r14","r15",      \
 625     "r16","r17","r18","r19","r20","r21","r22","r23",    \
 626     "r24","r25","r26","r27","r28","r29","r30","r31",    \
 627     "__SP_L__","__SP_H__","argL","argH"}
 628
 629 #define FINAL_PRESCAN_INSN(insn, operand, nop) final_prescan_insn (insn, operand,nop)
 630
 631 #define PRINT_OPERAND(STREAM, X, CODE) print_operand (STREAM, X, CODE)
 632
 633 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '~' || (CODE) == '!')
 634
 635 #define PRINT_OPERAND_ADDRESS(STREAM, X) print_operand_address(STREAM, X)
 636
 637 #define USER_LABEL_PREFIX ""
 638
 639 #define ASSEMBLER_DIALECT AVR_HAVE_MOVW
 640
 641 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO)      \
 642 {                                               \
 643   gcc_assert (REGNO < 32);                      \
 644   fprintf (STREAM, "\tpush\tr%d", REGNO);       \
 645 }
 646
 647 #define ASM_OUTPUT_REG_POP(STREAM, REGNO)       \
 648 {                                               \
 649   gcc_assert (REGNO < 32);                      \
 650   fprintf (STREAM, "\tpop\tr%d", REGNO);        \
 651 }
 652
 653 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)          \
 654   avr_output_addr_vec_elt(STREAM, VALUE)
 655
 656 #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) \
 657   (switch_to_section (progmem_section), \
 658    (*targetm.asm_out.internal_label) (STREAM, PREFIX, NUM))
 659
 660 #define ASM_OUTPUT_SKIP(STREAM, N)              \
 661 fprintf (STREAM, "\t.skip %lu,0\n", (unsigned long)(N))
 662
 663 #define ASM_OUTPUT_ALIGN(STREAM, POWER)                 \
 664   do {                                                  \
 665       if ((POWER) > 1)                                  \
 666           fprintf (STREAM, "\t.p2align\t%d\n", POWER);  \
 667   } while (0)
 668
 669 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
 670   default_elf_asm_output_external (FILE, DECL, NAME)
 671
 672 #define CASE_VECTOR_MODE HImode
 673
 674 #undef WORD_REGISTER_OPERATIONS
 675
 676 #define MOVE_MAX 4
 677
 678 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
 679
 680 #define Pmode HImode
 681
 682 #define FUNCTION_MODE HImode
 683
 684 #define DOLLARS_IN_IDENTIFIERS 0
 685
 686 #define NO_DOLLAR_IN_LABEL 1
 687
 688 #define TRAMPOLINE_SIZE 4
 689
 690 /* Store in cc_status the expressions
 691    that the condition codes will describe
 692    after execution of an instruction whose pattern is EXP.
 693    Do not alter them if the instruction would not alter the cc's.  */
 694
 695 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
 696
 697 /* The add insns don't set overflow in a usable way.  */
 698 #define CC_OVERFLOW_UNUSABLE 01000
 699 /* The mov,and,or,xor insns don't set carry.  That's ok though as the
 700    Z bit is all we need when doing unsigned comparisons on the result of
 701    these insns (since they're always with 0).  However, conditions.h has
 702    CC_NO_OVERFLOW defined for this purpose.  Rename it to something more
 703    understandable.  */
 704 #define CC_NO_CARRY CC_NO_OVERFLOW
 705
 706
 707 /* Output assembler code to FILE to increment profiler label # LABELNO
 708    for profiling a function entry.  */
 709
 710 #define FUNCTION_PROFILER(FILE, LABELNO)  \
 711   fprintf (FILE, "/* profiler %d */", (LABELNO))
 712
 713 #define ADJUST_INSN_LENGTH(INSN, LENGTH) (LENGTH =\
 714                                           adjust_insn_length (INSN, LENGTH))
 715
 716 extern const char *avr_device_to_arch (int argc, const char **argv);
 717 extern const char *avr_device_to_data_start (int argc, const char **argv);
 718 extern const char *avr_device_to_startfiles (int argc, const char **argv);
 719 extern const char *avr_device_to_devicelib (int argc, const char **argv);
 720
 721 #define EXTRA_SPEC_FUNCTIONS \
 722   { "device_to_arch", avr_device_to_arch }, \
 723   { "device_to_data_start", avr_device_to_data_start }, \
 724   { "device_to_startfile", avr_device_to_startfiles }, \
 725   { "device_to_devicelib", avr_device_to_devicelib },
 726
 727 #define CPP_SPEC ""
 728
 729 #define CC1_SPEC ""
 730
 731 #define CC1PLUS_SPEC "%{!frtti:-fno-rtti} \
 732     %{!fenforce-eh-specs:-fno-enforce-eh-specs} \
 733     %{!fexceptions:-fno-exceptions}"
 734 /* A C string constant that tells the GCC driver program options to
 735    pass to `cc1plus'.  */
 736
 737 #define ASM_SPEC "%{mmcu=avr25:-mmcu=avr2;mmcu=avr35:-mmcu=avr3;mmcu=avr31:-mmcu=avr3;mmcu=avr51:-mmcu=avr5;\
 738 mmcu=*:-mmcu=%*}"
 739
 740 #define LINK_SPEC "\
 741 %{mrelax:--relax\
 742          %{mpmem-wrap-around:%{mmcu=at90usb8*:--pmem-wrap-around=8k}\
 743                              %{mmcu=atmega16*:--pmem-wrap-around=16k}\
 744                              %{mmcu=atmega32*|\
 745                                mmcu=at90can32*:--pmem-wrap-around=32k}\
 746                              %{mmcu=atmega64*|\
 747                                mmcu=at90can64*|\
 748                                mmcu=at90usb64*:--pmem-wrap-around=64k}}}\
 749 %:device_to_arch(%{mmcu=*:%*})\
 750 %:device_to_data_start(%{mmcu=*:%*})"
 751
 752 #define LIB_SPEC \
 753   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lc }}}}}"
 754
 755 #define LIBSTDCXX "gcc"
 756 /* No libstdc++ for now.  Empty string doesn't work.  */
 757
 758 #define LIBGCC_SPEC \
 759   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lgcc }}}}}"
 760
 761 #define STARTFILE_SPEC "%:device_to_startfile(%{mmcu=*:%*})"
 762
 763 #define ENDFILE_SPEC ""
 764
 765 /* This is the default without any -mmcu=* option (AT90S*).  */
 766 #define MULTILIB_DEFAULTS { "mmcu=avr2" }
 767
 768 #define TEST_HARD_REG_CLASS(CLASS, REGNO) \
 769   TEST_HARD_REG_BIT (reg_class_contents[ (int) (CLASS)], REGNO)
 770
 771 /* Note that the other files fail to use these
 772    in some of the places where they should.  */
 773
 774 #if defined(__STDC__) || defined(ALMOST_STDC)
 775 #define AS2(a,b,c) #a " " #b "," #c
 776 #define AS2C(b,c) " " #b "," #c
 777 #define AS3(a,b,c,d) #a " " #b "," #c "," #d
 778 #define AS1(a,b) #a " " #b
 779 #else
 780 #define AS1(a,b) "a     b"
 781 #define AS2(a,b,c) "a   b,c"
 782 #define AS2C(b,c) " b,c"
 783 #define AS3(a,b,c,d) "a b,c,d"
 784 #endif
 785 #define OUT_AS1(a,b) output_asm_insn (AS1(a,b), operands)
 786 #define OUT_AS2(a,b,c) output_asm_insn (AS2(a,b,c), operands)
 787 #define CR_TAB "\n\t"
 788
 789 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 790
 791 #define DWARF2_DEBUGGING_INFO 1
 792
 793 #define DWARF2_ADDR_SIZE 4
 794
 795 #define OBJECT_FORMAT_ELF
 796
 797 #define HARD_REGNO_RENAME_OK(OLD_REG, NEW_REG) \
 798   avr_hard_regno_rename_ok (OLD_REG, NEW_REG)
 799
 800 /* A C structure for machine-specific, per-function data.
 801    This is added to the cfun structure.  */
 802 struct GTY(()) machine_function
 803 {
 804   /* 'true' - if current function is a naked function.  */
 805   int is_naked;
 806
 807   /* 'true' - if current function is an interrupt function
 808      as specified by the "interrupt" attribute.  */
 809   int is_interrupt;
 810
 811   /* 'true' - if current function is a signal function
 812      as specified by the "signal" attribute.  */
 813   int is_signal;
 814
 815   /* 'true' - if current function is a 'task' function
 816      as specified by the "OS_task" attribute.  */
 817   int is_OS_task;
 818
 819   /* 'true' - if current function is a 'main' function
 820      as specified by the "OS_main" attribute.  */
 821   int is_OS_main;
 822
 823   /* Current function stack size.  */
 824   int stack_usage;
 825 };