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/* Definitions of target machine for GNU compiler.

   Matsushita MN10300 series

   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,

   2007 Free Software Foundation, Inc.

   Contributed by Jeff Law (law@cygnus.com).

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 3, 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 COPYING3.  If not see

<http://www.gnu.org/licenses/>.  */

#undef ASM_SPEC

#undef LIB_SPEC

#undef ENDFILE_SPEC

#undef LINK_SPEC

#define LINK_SPEC "%{mrelax:--relax}"

#undef STARTFILE_SPEC

#define STARTFILE_SPEC "%{!mno-crt0:%{!shared:%{pg:gcrt0%O%s}%{!pg:%{p:mcrt0%O%s}%{!p:crt0%O%s}}}}"

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

#define TARGET_CPU_CPP_BUILTINS()               \

  do                                            \

    {                                           \

      builtin_define ("__mn10300__");           \

      builtin_define ("__MN10300__");           \

      builtin_assert ("cpu=mn10300");           \

      builtin_assert ("machine=mn10300");       \

    }                                           \

  while (0)

#define CPP_SPEC "%{mam33:-D__AM33__} %{mam33-2:-D__AM33__=2 -D__AM33_2__}"

extern GTY(()) int mn10300_unspec_int_label_counter;

enum processor_type {

  PROCESSOR_MN10300,

  PROCESSOR_AM33,

  PROCESSOR_AM33_2

};

extern enum processor_type mn10300_processor;

#define TARGET_AM33     (mn10300_processor >= PROCESSOR_AM33)

#define TARGET_AM33_2   (mn10300_processor == PROCESSOR_AM33_2)

#ifndef PROCESSOR_DEFAULT

#define PROCESSOR_DEFAULT PROCESSOR_MN10300

#endif

#define OVERRIDE_OPTIONS mn10300_override_options ()

/* Print subsidiary information on the compiler version in use.  */

#define TARGET_VERSION fprintf (stderr, " (MN10300)");

/* Target machine storage layout */

/* Define this if most significant bit is lowest numbered

   in instructions that operate on numbered bit-fields.

   This is not true on the Matsushita MN1003.  */

#define BITS_BIG_ENDIAN 0

/* Define this if most significant byte of a word is the lowest numbered.  */

/* This is not true on the Matsushita MN10300.  */

#define BYTES_BIG_ENDIAN 0

/* Define this if most significant word of a multiword number is lowest

   numbered.

   This is not true on the Matsushita MN10300.  */

#define WORDS_BIG_ENDIAN 0

/* Width of a word, in units (bytes).  */

#define UNITS_PER_WORD          4

/* Allocation boundary (in *bits*) for storing arguments in argument list.  */

#define PARM_BOUNDARY           32

/* The stack goes in 32 bit lumps.  */

#define STACK_BOUNDARY          32

/* Allocation boundary (in *bits*) for the code of a function.

   8 is the minimum boundary; it's unclear if bigger alignments

   would improve performance.  */

#define FUNCTION_BOUNDARY 8

/* No data type wants to be aligned rounder than this.  */

#define BIGGEST_ALIGNMENT       32

/* Alignment of field after `int : 0' in a structure.  */

#define EMPTY_FIELD_BOUNDARY 32

/* Define this if move instructions will actually fail to work

   when given unaligned data.  */

#define STRICT_ALIGNMENT 1

/* Define this as 1 if `char' should by default be signed; else as 0.  */

#define DEFAULT_SIGNED_CHAR 0

/* Standard register usage.  */

/* Number of actual hardware registers.

   The hardware registers are assigned numbers for the compiler

   from 0 to just below FIRST_PSEUDO_REGISTER.

   All registers that the compiler knows about must be given numbers,

   even those that are not normally considered general registers.  */

#define FIRST_PSEUDO_REGISTER 50

/* Specify machine-specific register numbers.  */

#define FIRST_DATA_REGNUM 0

#define LAST_DATA_REGNUM 3

#define FIRST_ADDRESS_REGNUM 4

#define LAST_ADDRESS_REGNUM 8

#define FIRST_EXTENDED_REGNUM 10

#define LAST_EXTENDED_REGNUM 17

#define FIRST_FP_REGNUM 18

#define LAST_FP_REGNUM 49

/* Specify the registers used for certain standard purposes.

   The values of these macros are register numbers.  */

/* Register to use for pushing function arguments.  */

#define STACK_POINTER_REGNUM (LAST_ADDRESS_REGNUM+1)

/* Base register for access to local variables of the function.  */

#define FRAME_POINTER_REGNUM (LAST_ADDRESS_REGNUM-1)

/* Base register for access to arguments of the function.  This

   is a fake register and will be eliminated into either the frame

   pointer or stack pointer.  */

#define ARG_POINTER_REGNUM LAST_ADDRESS_REGNUM

/* Register in which static-chain is passed to a function.  */

#define STATIC_CHAIN_REGNUM (FIRST_ADDRESS_REGNUM+1)

/* 1 for registers that have pervasive standard uses

   and are not available for the register allocator.  */

#define FIXED_REGISTERS \

  { 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 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, 0, 0, 0, 0, 0, 0, 0, 0, 0 \

  }

/* 1 for registers not available across function calls.

   These must include the FIXED_REGISTERS and also any

   registers that can be used without being saved.

   The latter must include the registers where values are returned

   and the register where structure-value addresses are passed.

   Aside from that, you can include as many other registers as you

   like.  */

#define CALL_USED_REGISTERS \

  { 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0 \

  , 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 \

  , 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 \

  }

#define REG_ALLOC_ORDER \

  { 0, 1, 4, 5, 2, 3, 6, 7, 10, 11, 12, 13, 14, 15, 16, 17, 8, 9 \

  , 42, 43, 44, 45, 46, 47, 48, 49, 34, 35, 36, 37, 38, 39, 40, 41 \

  , 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33 \

  }

#define CONDITIONAL_REGISTER_USAGE \

{                                               \

  unsigned int i;                               \

                                                \

  if (!TARGET_AM33)                             \

    {                                           \

      for (i = FIRST_EXTENDED_REGNUM;           \

           i <= LAST_EXTENDED_REGNUM; i++)      \

        fixed_regs[i] = call_used_regs[i] = 1;  \

    }                                           \

  if (!TARGET_AM33_2)                           \

    {                                           \

      for (i = FIRST_FP_REGNUM;                 \

           i <= LAST_FP_REGNUM;                 \

           i++)                                 \

        fixed_regs[i] = call_used_regs[i] = 1;  \

    }                                           \

  if (flag_pic)                                 \

    fixed_regs[PIC_OFFSET_TABLE_REGNUM] =       \

    call_used_regs[PIC_OFFSET_TABLE_REGNUM] = 1;\

}

/* Return number of consecutive hard regs needed starting at reg REGNO

   to hold something of mode MODE.

   This is ordinarily the length in words of a value of mode MODE

   but can be less for certain modes in special long registers.  */

#define HARD_REGNO_NREGS(REGNO, MODE)   \

  ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)

/* Value is 1 if hard register REGNO can hold a value of machine-mode

   MODE.  */

#define HARD_REGNO_MODE_OK(REGNO, MODE) \

 ((REGNO_REG_CLASS (REGNO) == DATA_REGS \

   || (TARGET_AM33 && REGNO_REG_CLASS (REGNO) == ADDRESS_REGS) \

   || REGNO_REG_CLASS (REGNO) == EXTENDED_REGS) \

  ? ((REGNO) & 1) == 0 || GET_MODE_SIZE (MODE) <= 4      \

  : ((REGNO) & 1) == 0 || GET_MODE_SIZE (MODE) == 4)

/* Value is 1 if it is a good idea to tie two pseudo registers

   when one has mode MODE1 and one has mode MODE2.

   If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,

   for any hard reg, then this must be 0 for correct output.  */

#define MODES_TIEABLE_P(MODE1, MODE2) \

  (TARGET_AM33  \

   || MODE1 == MODE2 \

   || (GET_MODE_SIZE (MODE1) <= 4 && GET_MODE_SIZE (MODE2) <= 4))

/* 4 data, and effectively 3 address registers is small as far as I'm

   concerned.  */

#define SMALL_REGISTER_CLASSES 1

/* Define the classes of registers for register constraints in the

   machine description.  Also define ranges of constants.

   One of the classes must always be named ALL_REGS and include all hard regs.

   If there is more than one class, another class must be named NO_REGS

   and contain no registers.

   The name GENERAL_REGS must be the name of a class (or an alias for

   another name such as ALL_REGS).  This is the class of registers

   that is allowed by "g" or "r" in a register constraint.

   Also, registers outside this class are allocated only when

   instructions express preferences for them.

   The classes must be numbered in nondecreasing order; that is,

   a larger-numbered class must never be contained completely

   in a smaller-numbered class.

   For any two classes, it is very desirable that there be another

   class that represents their union.  */

enum reg_class {

  NO_REGS, DATA_REGS, ADDRESS_REGS, SP_REGS,

  DATA_OR_ADDRESS_REGS, SP_OR_ADDRESS_REGS,

  EXTENDED_REGS, DATA_OR_EXTENDED_REGS, ADDRESS_OR_EXTENDED_REGS,

  SP_OR_EXTENDED_REGS, SP_OR_ADDRESS_OR_EXTENDED_REGS,

  FP_REGS, FP_ACC_REGS,

  GENERAL_REGS, ALL_REGS, LIM_REG_CLASSES

};

#define N_REG_CLASSES (int) LIM_REG_CLASSES

/* Give names of register classes as strings for dump file.  */

#define REG_CLASS_NAMES \

{ "NO_REGS", "DATA_REGS", "ADDRESS_REGS", \

  "SP_REGS", "DATA_OR_ADDRESS_REGS", "SP_OR_ADDRESS_REGS", \

  "EXTENDED_REGS", \

  "DATA_OR_EXTENDED_REGS", "ADDRESS_OR_EXTENDED_REGS", \

  "SP_OR_EXTENDED_REGS", "SP_OR_ADDRESS_OR_EXTENDED_REGS", \

  "FP_REGS", "FP_ACC_REGS", \

  "GENERAL_REGS", "ALL_REGS", "LIM_REGS" }

/* Define which registers fit in which classes.

   This is an initializer for a vector of HARD_REG_SET

   of length N_REG_CLASSES.  */

#define REG_CLASS_CONTENTS                      \

{  { 0,  0 },             /* No regs      */      \

 { 0x0000f, 0 }, /* DATA_REGS */         \

 { 0x001f0, 0 }, /* ADDRESS_REGS */      \

 { 0x00200, 0 }, /* SP_REGS */           \

 { 0x001ff, 0 }, /* DATA_OR_ADDRESS_REGS */\

 { 0x003f0, 0 }, /* SP_OR_ADDRESS_REGS */\

 { 0x3fc00, 0 }, /* EXTENDED_REGS */     \

 { 0x3fc0f, 0 }, /* DATA_OR_EXTENDED_REGS */     \

 { 0x3fdf0, 0 }, /* ADDRESS_OR_EXTENDED_REGS */  \

 { 0x3fe00, 0 }, /* SP_OR_EXTENDED_REGS */       \

 { 0x3fff0, 0 }, /* SP_OR_ADDRESS_OR_EXTENDED_REGS */    \

 { 0xfffc0000, 0x3ffff }, /* FP_REGS */         \

 { 0x03fc0000, 0 },      /* FP_ACC_REGS */       \

 { 0x3fdff, 0 },         /* GENERAL_REGS */      \

 { 0xffffffff, 0x3ffff } /* ALL_REGS    */      \

}

/* The same information, inverted:

   Return the class number of the smallest class containing

   reg number REGNO.  This could be a conditional expression

   or could index an array.  */

#define REGNO_REG_CLASS(REGNO) \

  ((REGNO) <= LAST_DATA_REGNUM ? DATA_REGS : \

   (REGNO) <= LAST_ADDRESS_REGNUM ? ADDRESS_REGS : \

   (REGNO) == STACK_POINTER_REGNUM ? SP_REGS : \

   (REGNO) <= LAST_EXTENDED_REGNUM ? EXTENDED_REGS : \

   (REGNO) <= LAST_FP_REGNUM ? FP_REGS : \

   NO_REGS)

/* The class value for index registers, and the one for base regs.  */

#define INDEX_REG_CLASS DATA_OR_EXTENDED_REGS

#define BASE_REG_CLASS  SP_OR_ADDRESS_REGS

/* Get reg_class from a letter such as appears in the machine description.  */

#define REG_CLASS_FROM_LETTER(C) \

  ((C) == 'd' ? DATA_REGS : \

   (C) == 'a' ? ADDRESS_REGS : \

   (C) == 'y' ? SP_REGS : \

   ! TARGET_AM33 ? NO_REGS : \

   (C) == 'x' ? EXTENDED_REGS : \

   ! TARGET_AM33_2 ? NO_REGS : \

   (C) == 'f' ? FP_REGS : \

   (C) == 'A' ? FP_ACC_REGS : \

   NO_REGS)

/* Macros to check register numbers against specific register classes.  */

/* The macros REG_OK_FOR..._P assume that the arg is a REG rtx

   and check its validity for a certain class.

   We have two alternate definitions for each of them.

   The usual definition accepts all pseudo regs; the other rejects

   them unless they have been allocated suitable hard regs.

   The symbol REG_OK_STRICT causes the latter definition to be used.

   Most source files want to accept pseudo regs in the hope that

   they will get allocated to the class that the insn wants them to be in.

   Source files for reload pass need to be strict.

   After reload, it makes no difference, since pseudo regs have

   been eliminated by then.  */

/* These assume that REGNO is a hard or pseudo reg number.

   They give nonzero only if REGNO is a hard reg of the suitable class

   or a pseudo reg currently allocated to a suitable hard reg.

   Since they use reg_renumber, they are safe only once reg_renumber

   has been allocated, which happens in local-alloc.c.  */

#ifndef REG_OK_STRICT

# define REG_STRICT 0

#else

# define REG_STRICT 1

#endif

# define REGNO_IN_RANGE_P(regno,min,max,strict) \

  (IN_RANGE ((regno), (min), (max))             \

   || ((strict)                                 \

       ? (reg_renumber                          \

          && reg_renumber[(regno)] >= (min)     \

          && reg_renumber[(regno)] <= (max))    \

       : (regno) >= FIRST_PSEUDO_REGISTER))

#define REGNO_DATA_P(regno, strict) \

  (REGNO_IN_RANGE_P ((regno), FIRST_DATA_REGNUM, LAST_DATA_REGNUM, \

                     (strict)))

#define REGNO_ADDRESS_P(regno, strict) \

  (REGNO_IN_RANGE_P ((regno), FIRST_ADDRESS_REGNUM, LAST_ADDRESS_REGNUM, \

                     (strict)))

#define REGNO_SP_P(regno, strict) \

  (REGNO_IN_RANGE_P ((regno), STACK_POINTER_REGNUM, STACK_POINTER_REGNUM, \

                     (strict)))

#define REGNO_EXTENDED_P(regno, strict) \

  (REGNO_IN_RANGE_P ((regno), FIRST_EXTENDED_REGNUM, LAST_EXTENDED_REGNUM, \

                     (strict)))

#define REGNO_AM33_P(regno, strict) \

  (REGNO_DATA_P ((regno), (strict)) || REGNO_ADDRESS_P ((regno), (strict)) \

   || REGNO_EXTENDED_P ((regno), (strict)))

#define REGNO_FP_P(regno, strict) \

  (REGNO_IN_RANGE_P ((regno), FIRST_FP_REGNUM, LAST_FP_REGNUM, (strict)))

#define REGNO_STRICT_OK_FOR_BASE_P(regno, strict) \

  (REGNO_SP_P ((regno), (strict)) \

   || REGNO_ADDRESS_P ((regno), (strict)) \

   || REGNO_EXTENDED_P ((regno), (strict)))

#define REGNO_OK_FOR_BASE_P(regno) \

  (REGNO_STRICT_OK_FOR_BASE_P ((regno), REG_STRICT))

#define REG_OK_FOR_BASE_P(X) \

  (REGNO_OK_FOR_BASE_P (REGNO (X)))

#define REGNO_STRICT_OK_FOR_BIT_BASE_P(regno, strict) \

  (REGNO_SP_P ((regno), (strict)) || REGNO_ADDRESS_P ((regno), (strict)))

#define REGNO_OK_FOR_BIT_BASE_P(regno) \

  (REGNO_STRICT_OK_FOR_BIT_BASE_P ((regno), REG_STRICT))

#define REG_OK_FOR_BIT_BASE_P(X) \

  (REGNO_OK_FOR_BIT_BASE_P (REGNO (X)))

#define REGNO_STRICT_OK_FOR_INDEX_P(regno, strict) \

  (REGNO_DATA_P ((regno), (strict)) || REGNO_EXTENDED_P ((regno), (strict)))

#define REGNO_OK_FOR_INDEX_P(regno) \

  (REGNO_STRICT_OK_FOR_INDEX_P ((regno), REG_STRICT))

#define REG_OK_FOR_INDEX_P(X) \

  (REGNO_OK_FOR_INDEX_P (REGNO (X)))

/* Given an rtx X being reloaded into a reg required to be

   in class CLASS, return the class of reg to actually use.

   In general this is just CLASS; but on some machines

   in some cases it is preferable to use a more restrictive class.  */

#define PREFERRED_RELOAD_CLASS(X,CLASS)                         \

  ((X) == stack_pointer_rtx && (CLASS) != SP_REGS               \

   ? ADDRESS_OR_EXTENDED_REGS                                   \

   : (GET_CODE (X) == MEM                                       \

      || (GET_CODE (X) == REG                                   \

          && REGNO (X) >= FIRST_PSEUDO_REGISTER)                \

      || (GET_CODE (X) == SUBREG                                \

          && GET_CODE (SUBREG_REG (X)) == REG                   \

          && REGNO (SUBREG_REG (X)) >= FIRST_PSEUDO_REGISTER)   \

      ? LIMIT_RELOAD_CLASS (GET_MODE (X), CLASS)                \

      : (CLASS)))

#define PREFERRED_OUTPUT_RELOAD_CLASS(X,CLASS) \

  (X == stack_pointer_rtx && CLASS != SP_REGS \

   ? ADDRESS_OR_EXTENDED_REGS : CLASS)

#define LIMIT_RELOAD_CLASS(MODE, CLASS) \

  (!TARGET_AM33 && (MODE == QImode || MODE == HImode) ? DATA_REGS : CLASS)

#define SECONDARY_RELOAD_CLASS(CLASS,MODE,IN) \

  mn10300_secondary_reload_class(CLASS,MODE,IN)

/* Return the maximum number of consecutive registers

   needed to represent mode MODE in a register of class CLASS.  */

#define CLASS_MAX_NREGS(CLASS, MODE)    \

  ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)

/* A class that contains registers which the compiler must always

   access in a mode that is the same size as the mode in which it

   loaded the register.  */

#define CLASS_CANNOT_CHANGE_SIZE FP_REGS

/* The letters I, J, K, L, M, N, O, P in a register constraint string

   can be used to stand for particular ranges of immediate operands.

   This macro defines what the ranges are.

   C is the letter, and VALUE is a constant value.

   Return 1 if VALUE is in the range specified by C.  */

#define INT_8_BITS(VALUE) ((unsigned) (VALUE) + 0x80 < 0x100)

#define INT_16_BITS(VALUE) ((unsigned) (VALUE) + 0x8000 < 0x10000)

#define CONST_OK_FOR_I(VALUE) ((VALUE) == 0)

#define CONST_OK_FOR_J(VALUE) ((VALUE) == 1)

#define CONST_OK_FOR_K(VALUE) ((VALUE) == 2)

#define CONST_OK_FOR_L(VALUE) ((VALUE) == 4)

#define CONST_OK_FOR_M(VALUE) ((VALUE) == 3)

#define CONST_OK_FOR_N(VALUE) ((VALUE) == 255 || (VALUE) == 65535)

#define CONST_OK_FOR_LETTER_P(VALUE, C) \

  ((C) == 'I' ? CONST_OK_FOR_I (VALUE) : \

   (C) == 'J' ? CONST_OK_FOR_J (VALUE) : \

   (C) == 'K' ? CONST_OK_FOR_K (VALUE) : \

   (C) == 'L' ? CONST_OK_FOR_L (VALUE) : \

   (C) == 'M' ? CONST_OK_FOR_M (VALUE) : \

   (C) == 'N' ? CONST_OK_FOR_N (VALUE) : 0)

/* Similar, but for floating constants, and defining letters G and H.

   Here VALUE is the CONST_DOUBLE rtx itself.

  `G' is a floating-point zero.  */

#define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \

  ((C) == 'G' ? (GET_MODE_CLASS (GET_MODE (VALUE)) == MODE_FLOAT        \

                 && (VALUE) == CONST0_RTX (GET_MODE (VALUE))) : 0)

/* Stack layout; function entry, exit and calling.  */

/* Define this if pushing a word on the stack

   makes the stack pointer a smaller address.  */

#define STACK_GROWS_DOWNWARD

/* Define this to nonzero if the nominal address of the stack frame

   is at the high-address end of the local variables;

   that is, each additional local variable allocated

   goes at a more negative offset in the frame.  */

#define FRAME_GROWS_DOWNWARD 1

/* Offset within stack frame to start allocating local variables at.

   If FRAME_GROWS_DOWNWARD, this is the offset to the END of the

   first local allocated.  Otherwise, it is the offset to the BEGINNING

   of the first local allocated.  */

#define STARTING_FRAME_OFFSET 0

/* Offset of first parameter from the argument pointer register value.  */

/* Is equal to the size of the saved fp + pc, even if an fp isn't

   saved since the value is used before we know.  */

#define FIRST_PARM_OFFSET(FNDECL) 4

#define ELIMINABLE_REGS                         \

{{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM},   \

 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},   \

 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}

#define CAN_ELIMINATE(FROM, TO) 1

#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \

  OFFSET = initial_offset (FROM, TO)

/* We can debug without frame pointers on the mn10300, so eliminate

   them whenever possible.  */

#define FRAME_POINTER_REQUIRED 0

#define CAN_DEBUG_WITHOUT_FP

/* Value is the number of bytes of arguments automatically

   popped when returning from a subroutine call.

   FUNDECL is the declaration node of the function (as a tree),

   FUNTYPE is the data type of the function (as a tree),

   or for a library call it is an identifier node for the subroutine name.

   SIZE is the number of bytes of arguments passed on the stack.  */

#define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) 0

/* We use d0/d1 for passing parameters, so allocate 8 bytes of space

   for a register flushback area.  */

#define REG_PARM_STACK_SPACE(DECL) 8

#define OUTGOING_REG_PARM_STACK_SPACE

#define ACCUMULATE_OUTGOING_ARGS 1

/* So we can allocate space for return pointers once for the function

   instead of around every call.  */

#define STACK_POINTER_OFFSET 4

/* 1 if N is a possible register number for function argument passing.

   On the MN10300, no registers are used in this way.  */

#define FUNCTION_ARG_REGNO_P(N) ((N) <= 1)

/* Define a data type for recording info about an argument list

   during the scan of that argument list.  This data type should

   hold all necessary information about the function itself

   and about the args processed so far, enough to enable macros

   such as FUNCTION_ARG to determine where the next arg should go.

   On the MN10300, this is a single integer, which is a number of bytes

   of arguments scanned so far.  */

#define CUMULATIVE_ARGS struct cum_arg

struct cum_arg {int nbytes; };

/* Initialize a variable CUM of type CUMULATIVE_ARGS

   for a call to a function whose data type is FNTYPE.

   For a library call, FNTYPE is 0.

   On the MN10300, the offset starts at 0.  */

#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \

 ((CUM).nbytes = 0)

/* Update the data in CUM to advance over an argument

   of mode MODE and data type TYPE.

   (TYPE is null for libcalls where that information may not be available.)  */

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

 ((CUM).nbytes += ((MODE) != BLKmode                    \

                   ? (GET_MODE_SIZE (MODE) + 3) & ~3    \

                   : (int_size_in_bytes (TYPE) + 3) & ~3))

/* Define where to put the arguments to a function.

   Value is zero to push the argument on the stack,

   or a hard register in which to store the argument.

   MODE is the argument's machine mode.

   TYPE is the data type of the argument (as a tree).

    This is null for libcalls where that information may

    not be available.

   CUM is a variable of type CUMULATIVE_ARGS which gives info about

    the preceding args and about the function being called.

   NAMED is nonzero if this argument is a named parameter

    (otherwise it is an extra parameter matching an ellipsis).  */

/* On the MN10300 all args are pushed.  */

#define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \

  function_arg (&CUM, MODE, TYPE, NAMED)

/* Define how to find the value returned by a function.

   VALTYPE is the data type of the value (as a tree).

   If the precise function being called is known, FUNC is its FUNCTION_DECL;

   otherwise, FUNC is 0.  */

#define FUNCTION_VALUE(VALTYPE, FUNC) \

  mn10300_function_value (VALTYPE, FUNC, 0)

#define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) \

  mn10300_function_value (VALTYPE, FUNC, 1)

/* Define how to find the value returned by a library function

   assuming the value has mode MODE.  */

#define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, FIRST_DATA_REGNUM)

/* 1 if N is a possible register number for a function value.  */

#define FUNCTION_VALUE_REGNO_P(N) \

  ((N) == FIRST_DATA_REGNUM || (N) == FIRST_ADDRESS_REGNUM)

#define DEFAULT_PCC_STRUCT_RETURN 0

/* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,

   the stack pointer does not matter.  The value is tested only in

   functions that have frame pointers.

   No definition is equivalent to always zero.  */

#define EXIT_IGNORE_STACK 1

/* Output assembler code to FILE to increment profiler label # LABELNO

   for profiling a function entry.  */

#define FUNCTION_PROFILER(FILE, LABELNO) ;

#define TRAMPOLINE_TEMPLATE(FILE)                       \

  do {                                                  \

    fprintf (FILE, "\tadd -4,sp\n");                    \

    fprintf (FILE, "\t.long 0x0004fffa\n");             \

    fprintf (FILE, "\tmov (0,sp),a0\n");                \

    fprintf (FILE, "\tadd 4,sp\n");                     \

    fprintf (FILE, "\tmov (13,a0),a1\n");               \

    fprintf (FILE, "\tmov (17,a0),a0\n");               \

    fprintf (FILE, "\tjmp (a0)\n");                     \

    fprintf (FILE, "\t.long 0\n");                      \

    fprintf (FILE, "\t.long 0\n");                      \

  } while (0)

/* Length in units of the trampoline for entering a nested function.  */

#define TRAMPOLINE_SIZE 0x1b

#define TRAMPOLINE_ALIGNMENT 32

/* Emit RTL insns to initialize the variable parts of a trampoline.

   FNADDR is an RTX for the address of the function's pure code.

   CXT is an RTX for the static chain value for the function.  */

#define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)                       \

{                                                                       \

  emit_move_insn (gen_rtx_MEM (SImode, plus_constant ((TRAMP), 0x14)),  \

                 (CXT));                                                \

  emit_move_insn (gen_rtx_MEM (SImode, plus_constant ((TRAMP), 0x18)),  \

                 (FNADDR));                                             \

}

/* A C expression whose value is RTL representing the value of the return

   address for the frame COUNT steps up from the current frame.

   On the mn10300, the return address is not at a constant location

   due to the frame layout.  Luckily, it is at a constant offset from

   the argument pointer, so we define RETURN_ADDR_RTX to return a

   MEM using arg_pointer_rtx.  Reload will replace arg_pointer_rtx

   with a reference to the stack/frame pointer + an appropriate offset.  */

#define RETURN_ADDR_RTX(COUNT, FRAME)   \

  ((COUNT == 0)                         \

   ? gen_rtx_MEM (Pmode, arg_pointer_rtx) \

   : (rtx) 0)

/* Implement `va_start' for varargs and stdarg.  */

#define EXPAND_BUILTIN_VA_START(valist, nextarg) \

  mn10300_va_start (valist, nextarg)

/* 1 if X is an rtx for a constant that is a valid address.  */

#define CONSTANT_ADDRESS_P(X)   CONSTANT_P (X)

/* Extra constraints.  */

#define OK_FOR_Q(OP) \

   (GET_CODE (OP) == MEM && ! CONSTANT_ADDRESS_P (XEXP (OP, 0)))

#define OK_FOR_R(OP) \

   (GET_CODE (OP) == MEM                                        \

    && GET_MODE (OP) == QImode                                  \

    && (CONSTANT_ADDRESS_P (XEXP (OP, 0))                        \

        || (GET_CODE (XEXP (OP, 0)) == REG                       \

            && REG_OK_FOR_BIT_BASE_P (XEXP (OP, 0))              \

            && XEXP (OP, 0) != stack_pointer_rtx)                \

        || (GET_CODE (XEXP (OP, 0)) == PLUS                      \

            && GET_CODE (XEXP (XEXP (OP, 0), 0)) == REG           \

            && REG_OK_FOR_BIT_BASE_P (XEXP (XEXP (OP, 0), 0))     \

            && XEXP (XEXP (OP, 0), 0) != stack_pointer_rtx        \

            && GET_CODE (XEXP (XEXP (OP, 0), 1)) == CONST_INT    \

            && INT_8_BITS (INTVAL (XEXP (XEXP (OP, 0), 1))))))

#define OK_FOR_T(OP) \

   (GET_CODE (OP) == MEM                                        \

    && GET_MODE (OP) == QImode                                  \

    && (GET_CODE (XEXP (OP, 0)) == REG                           \

        && REG_OK_FOR_BIT_BASE_P (XEXP (OP, 0))                  \

        && XEXP (OP, 0) != stack_pointer_rtx))

#define EXTRA_CONSTRAINT(OP, C) \

 ((C) == 'R' ? OK_FOR_R (OP) \