avr.h

Mac OS X 10.4.9 for x86 Source Code gcc 实现源代码

/* Definitions of target machine for GNU compiler,
   for ATMEL AVR at90s8515, ATmega103/103L, ATmega603/603L microcontrollers.
   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
   Free Software Foundation, Inc.
   Contributed by Denis Chertykov ([e-mail])

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Names to predefine in the preprocessor for this target machine.  */

#define TARGET_CPU_CPP_BUILTINS()		\
  do						\
    {						\
      builtin_define_std ("AVR");		\
      if (avr_base_arch_macro)			\
	builtin_define (avr_base_arch_macro);	\
      if (avr_extra_arch_macro)			\
	builtin_define (avr_extra_arch_macro);	\
      if (avr_asm_only_p)			\
	builtin_define ("__AVR_ASM_ONLY__");	\
      if (avr_enhanced_p)			\
	builtin_define ("__AVR_ENHANCED__");	\
      if (avr_mega_p)				\
	builtin_define ("__AVR_MEGA__");	\
      if (TARGET_NO_INTERRUPTS)			\
	builtin_define ("__NO_INTERRUPTS__");	\
    }						\
  while (0)

/* This declaration should be present.  */
extern int target_flags;

#define MASK_ALL_DEBUG		0x00000FE0
#define MASK_ORDER_1		0x00001000
#define MASK_INSN_SIZE_DUMP	0x00002000
#define MASK_ORDER_2		0x00004000
#define MASK_NO_TABLEJUMP	0x00008000
#define MASK_INT8		0x00010000
#define MASK_NO_INTERRUPTS	0x00020000
#define MASK_CALL_PROLOGUES	0x00040000
#define MASK_TINY_STACK		0x00080000
#define MASK_SHORT_CALLS	0x00100000

#define TARGET_ORDER_1		(target_flags & MASK_ORDER_1)
#define TARGET_ORDER_2		(target_flags & MASK_ORDER_2)
#define TARGET_INT8		(target_flags & MASK_INT8)
#define TARGET_NO_INTERRUPTS	(target_flags & MASK_NO_INTERRUPTS)
#define TARGET_INSN_SIZE_DUMP	(target_flags & MASK_INSN_SIZE_DUMP)
#define TARGET_CALL_PROLOGUES	(target_flags & MASK_CALL_PROLOGUES)
#define TARGET_TINY_STACK	(target_flags & MASK_TINY_STACK)
#define TARGET_NO_TABLEJUMP	(target_flags & MASK_NO_TABLEJUMP)
#define TARGET_SHORT_CALLS	(target_flags & MASK_SHORT_CALLS)
#define TARGET_ALL_DEBUG	(target_flags & MASK_ALL_DEBUG)

#define TARGET_SWITCHES {						\
  { "order1", MASK_ORDER_1, NULL },					\
  { "order2", MASK_ORDER_2, NULL },					\
  { "int8", MASK_INT8, N_("Assume int to be 8 bit integer") },		\
  { "no-interrupts", MASK_NO_INTERRUPTS,				\
    N_("Change the stack pointer without disabling interrupts") },	\
  { "call-prologues", MASK_CALL_PROLOGUES,				\
    N_("Use subroutines for function prologue/epilogue") },		\
  { "tiny-stack", MASK_TINY_STACK,					\
    N_("Change only the low 8 bits of the stack pointer") },		\
  { "no-tablejump", MASK_NO_TABLEJUMP,					\
    N_("Do not generate tablejump insns") },				\
  { "short-calls", MASK_SHORT_CALLS,					\
    N_("Use rjmp/rcall (limited range) on >8K devices") },		\
  { "size", MASK_INSN_SIZE_DUMP,					\
    N_("Output instruction sizes to the asm file") },			\
  { "deb", MASK_ALL_DEBUG, NULL },					\
  { "", 0, NULL } }

extern const char *avr_init_stack;
extern const char *avr_mcu_name;

extern const char *avr_base_arch_macro;
extern const char *avr_extra_arch_macro;
extern int avr_mega_p;
extern int avr_enhanced_p;
extern int avr_asm_only_p;

#define AVR_MEGA (avr_mega_p && !TARGET_SHORT_CALLS)
#define AVR_ENHANCED (avr_enhanced_p)

#define TARGET_OPTIONS {						      \
 { "init-stack=", &avr_init_stack, N_("Specify the initial stack address"), 0}, \
 { "mcu=", &avr_mcu_name, N_("Specify the MCU name"), 0} }

#define TARGET_VERSION fprintf (stderr, " (GNU assembler syntax)");

#define OVERRIDE_OPTIONS avr_override_options ()

#define CAN_DEBUG_WITHOUT_FP

#define BITS_BIG_ENDIAN 0
#define BYTES_BIG_ENDIAN 0
#define WORDS_BIG_ENDIAN 0

#ifdef IN_LIBGCC2
/* This is to get correct SI and DI modes in libgcc2.c (32 and 64 bits).  */
#define UNITS_PER_WORD 4
#else
/* Width of a word, in units (bytes).  */
#define UNITS_PER_WORD 1
#endif

#define POINTER_SIZE 16


/* Maximum sized of reasonable data type
   DImode or Dfmode ...  */
#define MAX_FIXED_MODE_SIZE 32

#define PARM_BOUNDARY 8

#define FUNCTION_BOUNDARY 8

#define EMPTY_FIELD_BOUNDARY 8

/* No data type wants to be aligned rounder than this.  */
#define BIGGEST_ALIGNMENT 8


#define STRICT_ALIGNMENT 0

#define INT_TYPE_SIZE (TARGET_INT8 ? 8 : 16)
#define SHORT_TYPE_SIZE (INT_TYPE_SIZE == 8 ? INT_TYPE_SIZE : 16)
#define LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 16 : 32)
#define LONG_LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 32 : 64)
#define FLOAT_TYPE_SIZE 32
#define DOUBLE_TYPE_SIZE 32
#define LONG_DOUBLE_TYPE_SIZE 32

#define DEFAULT_SIGNED_CHAR 1

#define SIZE_TYPE (INT_TYPE_SIZE == 8 ? "long unsigned int" : "unsigned int")
#define PTRDIFF_TYPE (INT_TYPE_SIZE == 8 ? "long int" :"int")

#define WCHAR_TYPE_SIZE 16

#define FIRST_PSEUDO_REGISTER 36

#define FIXED_REGISTERS {\
  1,1,/* r0 r1 */\
  0,0,/* r2 r3 */\
  0,0,/* r4 r5 */\
  0,0,/* r6 r7 */\
  0,0,/* r8 r9 */\
  0,0,/* r10 r11 */\
  0,0,/* r12 r13 */\
  0,0,/* r14 r15 */\
  0,0,/* r16 r17 */\
  0,0,/* r18 r19 */\
  0,0,/* r20 r21 */\
  0,0,/* r22 r23 */\
  0,0,/* r24 r25 */\
  0,0,/* r26 r27 */\
  0,0,/* r28 r29 */\
  0,0,/* r30 r31 */\
  1,1,/*  STACK */\
  1,1 /* arg pointer */  }

#define CALL_USED_REGISTERS {			\
  1,1,/* r0 r1 */				\
    0,0,/* r2 r3 */				\
    0,0,/* r4 r5 */				\
    0,0,/* r6 r7 */				\
    0,0,/* r8 r9 */				\
    0,0,/* r10 r11 */				\
    0,0,/* r12 r13 */				\
    0,0,/* r14 r15 */				\
    0,0,/* r16 r17 */				\
    1,1,/* r18 r19 */				\
    1,1,/* r20 r21 */				\
    1,1,/* r22 r23 */				\
    1,1,/* r24 r25 */				\
    1,1,/* r26 r27 */				\
    0,0,/* r28 r29 */				\
    1,1,/* r30 r31 */				\
    1,1,/*  STACK */				\
    1,1 /* arg pointer */  }

#define REG_ALLOC_ORDER {			\
    24,25,					\
    18,19,					\
    20,21,					\
    22,23,					\
    30,31,					\
    26,27,					\
    28,29,					\
    17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,	\
    0,1,					\
    32,33,34,35					\
    }

#define ORDER_REGS_FOR_LOCAL_ALLOC order_regs_for_local_alloc ()


#define HARD_REGNO_NREGS(REGNO, MODE) ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)

#define HARD_REGNO_MODE_OK(REGNO, MODE) avr_hard_regno_mode_ok(REGNO, MODE)

#define MODES_TIEABLE_P(MODE1, MODE2) 1

enum reg_class {
  NO_REGS,
  R0_REG,			/* r0 */
  POINTER_X_REGS,		/* r26 - r27 */
  POINTER_Y_REGS,		/* r28 - r29 */
  POINTER_Z_REGS,		/* r30 - r31 */
  STACK_REG,			/* STACK */
  BASE_POINTER_REGS,		/* r28 - r31 */
  POINTER_REGS,			/* r26 - r31 */
  ADDW_REGS,			/* r24 - r31 */
  SIMPLE_LD_REGS,		/* r16 - r23 */
  LD_REGS,			/* r16 - r31 */
  NO_LD_REGS,			/* r0 - r15 */
  GENERAL_REGS,			/* r0 - r31 */
  ALL_REGS, LIM_REG_CLASSES
};


#define N_REG_CLASSES (int)LIM_REG_CLASSES

#define REG_CLASS_NAMES {					\
		 "NO_REGS",					\
		   "R0_REG",	/* r0 */                        \
		   "POINTER_X_REGS", /* r26 - r27 */		\
		   "POINTER_Y_REGS", /* r28 - r29 */		\
		   "POINTER_Z_REGS", /* r30 - r31 */		\
		   "STACK_REG",	/* STACK */			\
		   "BASE_POINTER_REGS",	/* r28 - r31 */		\
		   "POINTER_REGS", /* r26 - r31 */		\
		   "ADDW_REGS",	/* r24 - r31 */			\
                   "SIMPLE_LD_REGS", /* r16 - r23 */            \
		   "LD_REGS",	/* r16 - r31 */			\
                   "NO_LD_REGS", /* r0 - r15 */                 \
		   "GENERAL_REGS", /* r0 - r31 */		\
		   "ALL_REGS" }

#define REG_X 26
#define REG_Y 28
#define REG_Z 30
#define REG_W 24

#define REG_CLASS_CONTENTS {						\
  {0x00000000,0x00000000},	/* NO_REGS */				\
  {0x00000001,0x00000000},	/* R0_REG */                            \
  {3 << REG_X,0x00000000},      /* POINTER_X_REGS, r26 - r27 */		\
  {3 << REG_Y,0x00000000},      /* POINTER_Y_REGS, r28 - r29 */		\
  {3 << REG_Z,0x00000000},      /* POINTER_Z_REGS, r30 - r31 */		\
  {0x00000000,0x00000003},	/* STACK_REG, STACK */			\
  {(3 << REG_Y) | (3 << REG_Z),						\
     0x00000000},		/* BASE_POINTER_REGS, r28 - r31 */	\
  {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z),				\
     0x00000000},		/* POINTER_REGS, r26 - r31 */		\
  {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z) | (3 << REG_W),		\
     0x00000000},		/* ADDW_REGS, r24 - r31 */		\
  {0x00ff0000,0x00000000},	/* SIMPLE_LD_REGS r16 - r23 */          \
  {(3 << REG_X)|(3 << REG_Y)|(3 << REG_Z)|(3 << REG_W)|(0xff << 16),	\
     0x00000000},	/* LD_REGS, r16 - r31 */			\
  {0x0000ffff,0x00000000},	/* NO_LD_REGS  r0 - r15 */              \
  {0xffffffff,0x00000000},	/* GENERAL_REGS, r0 - r31 */		\
  {0xffffffff,0x00000003}	/* ALL_REGS */				\
}

#define REGNO_REG_CLASS(R) avr_regno_reg_class(R)

#define BASE_REG_CLASS (reload_completed ? BASE_POINTER_REGS : POINTER_REGS)

#define INDEX_REG_CLASS NO_REGS

#define REG_CLASS_FROM_LETTER(C) avr_reg_class_from_letter(C)

#define REGNO_OK_FOR_BASE_P(r) (((r) < FIRST_PSEUDO_REGISTER		\
				 && ((r) == REG_X			\
				     || (r) == REG_Y			\
				     || (r) == REG_Z			\
				     || (r) == ARG_POINTER_REGNUM))	\
				|| (reg_renumber			\
				    && (reg_renumber[r] == REG_X	\
					|| reg_renumber[r] == REG_Y	\
					|| reg_renumber[r] == REG_Z	\
					|| (reg_renumber[r]		\
					    == ARG_POINTER_REGNUM))))

#define REGNO_OK_FOR_INDEX_P(NUM) 0

#define PREFERRED_RELOAD_CLASS(X, CLASS) preferred_reload_class(X,CLASS)

#define SMALL_REGISTER_CLASSES 1

#define CLASS_LIKELY_SPILLED_P(c) class_likely_spilled_p(c)

#define CLASS_MAX_NREGS(CLASS, MODE)   class_max_nregs (CLASS, MODE)

#define CONST_OK_FOR_LETTER_P(VALUE, C)				\
  ((C) == 'I' ? (VALUE) >= 0 && (VALUE) <= 63 :			\
   (C) == 'J' ? (VALUE) <= 0 && (VALUE) >= -63:			\
   (C) == 'K' ? (VALUE) == 2 :					\
   (C) == 'L' ? (VALUE) == 0 :					\
   (C) == 'M' ? (VALUE) >= 0 && (VALUE) <= 0xff :		\
   (C) == 'N' ? (VALUE) == -1:					\
   (C) == 'O' ? (VALUE) == 8 || (VALUE) == 16 || (VALUE) == 24:	\
   (C) == 'P' ? (VALUE) == 1 :					\
   0)

#define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
  ((C) == 'G' ? (VALUE) == CONST0_RTX (SFmode)	\
   : 0)

#define EXTRA_CONSTRAINT(x, c) extra_constraint(x, c)

#define STACK_PUSH_CODE POST_DEC

#define STACK_GROWS_DOWNWARD

#define STARTING_FRAME_OFFSET 1

#define STACK_POINTER_OFFSET 1

#define FIRST_PARM_OFFSET(FUNDECL) 0

#define STACK_BOUNDARY 8

#define STACK_POINTER_REGNUM 32

#define FRAME_POINTER_REGNUM REG_Y

#define ARG_POINTER_REGNUM 34

#define STATIC_CHAIN_REGNUM 2

#define FRAME_POINTER_REQUIRED frame_pointer_required_p()

#define ELIMINABLE_REGS {					\
      {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},		\
	{FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}		\
       ,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}}

#define CAN_ELIMINATE(FROM, TO) (((FROM) == ARG_POINTER_REGNUM		   \
				  && (TO) == FRAME_POINTER_REGNUM)	   \
				 || (((FROM) == FRAME_POINTER_REGNUM	   \
				      || (FROM) == FRAME_POINTER_REGNUM+1) \
				     && ! FRAME_POINTER_REQUIRED	   \
				     ))

#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)			\
     OFFSET = initial_elimination_offset (FROM, TO)

#define RETURN_ADDR_RTX(count, x) \
  gen_rtx_MEM (Pmode, memory_address (Pmode, plus_constant (tem, 1)))

#define PUSH_ROUNDING(NPUSHED) (NPUSHED)

#define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0

#define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) (function_arg (&(CUM), MODE, TYPE, NAMED))

typedef struct avr_args {
  int nregs;			/* # registers available for passing */
  int regno;			/* next available register number */
} CUMULATIVE_ARGS;

#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
  init_cumulative_args (&(CUM), FNTYPE, LIBNAME, FNDECL)

#define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)	\
  (function_arg_advance (&CUM, MODE, TYPE, NAMED))

#define FUNCTION_ARG_REGNO_P(r) function_arg_regno_p(r)

extern int avr_reg_order[];

#define RET_REGISTER avr_ret_register ()

#define FUNCTION_VALUE(VALTYPE, FUNC) avr_function_value (VALTYPE, FUNC)

#define LIBCALL_VALUE(MODE)  avr_libcall_value (MODE)

#define FUNCTION_VALUE_REGNO_P(N) ((int) (N) == RET_REGISTER)

#define DEFAULT_PCC_STRUCT_RETURN 0

#define EPILOGUE_USES(REGNO) 0

#define HAVE_POST_INCREMENT 1
#define HAVE_PRE_DECREMENT 1

#define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)

#define MAX_REGS_PER_ADDRESS 1

#ifdef REG_OK_STRICT
#  define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR)	\
{							\
  if (legitimate_address_p (mode, operand, 1))		\
    goto ADDR;						\
}
#  else
#  define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR)	\
{							\
  if (legitimate_address_p (mode, operand, 0))		\
    goto ADDR;						\
}
#endif

#define REG_OK_FOR_BASE_NOSTRICT_P(X) \
  (REGNO (X) >= FIRST_PSEUDO_REGISTER || REG_OK_FOR_BASE_STRICT_P(X))

#define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))

#ifdef REG_OK_STRICT
#  define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P (X)
#else
#  define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NOSTRICT_P (X)
#endif

#define REG_OK_FOR_INDEX_P(X) 0

#define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)				\
{									\
  (X) = legitimize_address (X, OLDX, MODE);				\
  if (memory_address_p (MODE, X))					\
    goto WIN;								\
}

#define XEXP_(X,Y) (X)
#define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN)    \
do {									    \
  if (1&&(GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC))	    \
    {									    \
      push_reload (XEXP (X,0), XEXP (X,0), &XEXP (X,0), &XEXP (X,0),	    \
	           POINTER_REGS, GET_MODE (X),GET_MODE (X) , 0, 0,	    \
		   OPNUM, RELOAD_OTHER);				    \
      goto WIN;								    \
    }									    \
  if (GET_CODE (X) == PLUS						    \
      && REG_P (XEXP (X, 0))						    \
      && GET_CODE (XEXP (X, 1)) == CONST_INT				    \
      && INTVAL (XEXP (X, 1)) >= 1)					    \
    {									    \
      int fit = INTVAL (XEXP (X, 1)) <= (64 - GET_MODE_SIZE (MODE));	    \
      if (fit)								    \