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/* Definitions of target machine for GNU compiler.  OpenRISC 1000 version.

   Copyright (C) 1987, 1988, 1992, 1995, 1996, 1999, 2000, 2001, 2002,

   2003, 2004, 2005 Free Software Foundation, Inc.

   Contributed by Damjan Lampret <damjanl@bsemi.com> in 1999.

   Major optimizations by Matjaz Breskvar <matjazb@bsemi.com> in 2005.

This file is part of GNU CC.

GNU CC 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 1, or (at your option)

any later version.

GNU CC 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 GNU CC; see the file COPYING.  If not, write to

the Free Software Foundation, 59 Temple Place - Suite 330,

Boston, MA 02111-1307, USA.  */

#ifndef _OR32_H_

#define _OR32_H_

/* Target CPU builtins */

#define TARGET_CPU_CPP_BUILTINS()               \

  do                                            \

    {                                           \

      builtin_define_std ("OR1K");              \

      builtin_define_std ("or1k");              \

      builtin_assert ("cpu=or1k");              \

      builtin_assert ("machine=or1k");          \

    }                                           \

  while (0)

#if 0

/* Which library to get.  The only difference from the default is to get

   libsc.a if -sim is given to the driver.  Repeat -lc -lsysX

   {X=sim,linux}, because libsysX needs (at least) errno from libc, and

   then we want to resolve new unknowns in libc against libsysX, not

   libnosys.  */

/* Override previous definitions (linux.h).  */

#undef LIB_SPEC

#define LIB_SPEC \

 "%{sim*:-lc -lsyssim -lc -lsyssim}\

  %{!sim*:%{g*:-lg}\

    %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} -lbsp}\

  -lnosys"

#endif

#define TARGET_VERSION fprintf (stderr, " (OpenRISC 1000)");

/* Run-time compilation parameters selecting different hardware subsets.  */

extern int target_flags;

/* Enable hardware fp support. */

#define MASK_HARD_FLOAT         0x00000001

/* Enable hardware div instruction. */

#define MASK_HARD_DIV           0x00000002

/* Enable hardware mul instruction. */

#define MASK_HARD_MUL           0x00000004

/* Use aligned jumps. */

#define MASK_ALIGNED_JUMPS      0x00000008

/* Use l.extbs and l.exths instructions. */

#define MASK_SEXT               0x00000010

/* Use l.cmov instruction. */

#define MASK_CMOV               0x00000020

/* Emit prologue and epilogue. */

#define MASK_SCHED_LOGUE        0x00000040

/* Emit prologue and epilogue. */

#define MASK_ROR                0x00000080

/* Emit prologue and epilogue. */

#define MASK_SIBCALL            0x00000100

/* Macros used in the machine description to test the flags.  */

#define TARGET_HARD_FLOAT       (target_flags & MASK_HARD_FLOAT)

#define TARGET_HARD_DIV         (target_flags & MASK_HARD_DIV)

#define TARGET_HARD_MUL         (target_flags & MASK_HARD_MUL)

#define TARGET_ALIGNED_JUMPS    (target_flags & MASK_ALIGNED_JUMPS)

#define TARGET_SEXT             (target_flags & MASK_SEXT)

#define TARGET_CMOV             (target_flags & MASK_CMOV)

#define TARGET_SCHED_LOGUE      (target_flags & MASK_SCHED_LOGUE)

#define TARGET_ROR              (target_flags & MASK_ROR)

#define TARGET_SIBCALL          (target_flags & MASK_SIBCALL)

/* Macro to define tables used to set the flags.

   This is a list in braces of pairs in braces,

   each pair being { "NAME", VALUE }

   where VALUE is the bits to set or minus the bits to clear.

   An empty string NAME is used to identify the default VALUE.  */

#define TARGET_SWITCHES                                                                  \

  { {"hard-float",      MASK_HARD_FLOAT,        N_("Use hardware floating point.")},     \

    {"soft-float",      - MASK_HARD_FLOAT,      N_("Use software floating point.")},     \

    {"hard-div",        MASK_HARD_DIV,          N_("Use hardware divison.")},            \

    {"soft-div",        - MASK_HARD_DIV,        N_("Use software divison.")},            \

    {"hard-mul",        MASK_HARD_MUL,          N_("Use hardware multiplication.")},     \

    {"soft-mul",        - MASK_HARD_MUL,        N_("Use software multiplication.")},     \

    {"aj",              MASK_ALIGNED_JUMPS,     N_("Use aligned jumps.")},               \

    {"no-aj",           - MASK_ALIGNED_JUMPS,   N_("Do not use aligned jumps.")},        \

    {"sext",            MASK_SEXT,              N_("Use sign extending instructions.")}, \

    {"no-sext",         - MASK_SEXT,            N_("Do not use sign extending insn.")},  \

    {"cmov",            MASK_CMOV,              N_("Use conditional move insn.")},       \

    {"no-cmov",         - MASK_CMOV,            N_("Do not use conditional move insn.")},\

    {"logue",           MASK_SCHED_LOGUE,       N_("Schedule pro/epi-logue.")},          \

    {"no-logue",        - MASK_SCHED_LOGUE,     N_("Do not schedule pro/epi-logue.")},   \

    {"ror",             MASK_ROR,               N_("Emit ror insns.")},                  \

    {"no-ror",          - MASK_ROR,             N_("Do not emit ror insns.")},           \

    {"sibcall",         MASK_SIBCALL,           N_("Enable sibcall optimization.")},     \

    {"no-sibcall",      - MASK_SIBCALL,         N_("Disable sibcall optimization.")},    \

    { "",               TARGET_DEFAULT,         0}}

/* Default target_flags if no switches specified.  */

#ifndef TARGET_DEFAULT

#define TARGET_DEFAULT (MASK_HARD_MUL | MASK_CMOV)

#endif

#undef TARGET_ASM_NAMED_SECTION

#define TARGET_ASM_NAMED_SECTION  default_elf_asm_named_section

/* 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 or1k.  */

#define BITS_BIG_ENDIAN 0

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

#define BYTES_BIG_ENDIAN 1

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

#define WORDS_BIG_ENDIAN 1

/* Number of bits in an addressable storage unit */

#define BITS_PER_UNIT 8

#define BITS_PER_WORD 32

#define SHORT_TYPE_SIZE 16

#define INT_TYPE_SIZE 32

#define LONG_TYPE_SIZE 32

#define LONG_LONG_TYPE_SIZE 64

#define FLOAT_TYPE_SIZE 32

#define DOUBLE_TYPE_SIZE 64

#define LONG_DOUBLE_TYPE_SIZE 64

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

#define UNITS_PER_WORD 4

/* Width in bits of a pointer.

   See also the macro `Pmode' defined below.  */

#define POINTER_SIZE 32

/* Allocation boundary (in *bits*) for storing pointers in memory.  */

#define POINTER_BOUNDARY 32

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

#define PARM_BOUNDARY 32

/* Boundary (in *bits*) on which stack pointer should be aligned.  */

#define STACK_BOUNDARY 32

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

#define FUNCTION_BOUNDARY 32

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

#define EMPTY_FIELD_BOUNDARY 8

/* Every structure's size must be a multiple of this.  */

#define STRUCTURE_SIZE_BOUNDARY 32

/* A bitfield declared as `int' forces `int' alignment for the struct.  */

#define PCC_BITFIELD_TYPE_MATTERS 1

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

#define BIGGEST_ALIGNMENT 32

/* The best alignment to use in cases where we have a choice.  */

#define FASTEST_ALIGNMENT 32

/* Make strings word-aligned so strcpy from constants will be faster.  */

/*

#define CONSTANT_ALIGNMENT(EXP, ALIGN)                                  \

  ((TREE_CODE (EXP) == STRING_CST || TREE_CODE (EXP) == CONSTRUCTOR)    \

    && (ALIGN) < FASTEST_ALIGNMENT                                      \

   ? FASTEST_ALIGNMENT : (ALIGN))

*/

/* One use of this macro is to increase alignment of medium-size

   data to make it all fit in fewer cache lines.  Another is to

   cause character arrays to be word-aligned so that `strcpy' calls

   that copy constants to character arrays can be done inline.  */

/*

#define DATA_ALIGNMENT(TYPE, ALIGN)                                     \

  ((((ALIGN) < FASTEST_ALIGNMENT)                                       \

    && (TREE_CODE (TYPE) == ARRAY_TYPE                                  \

        || TREE_CODE (TYPE) == UNION_TYPE                               \

        || TREE_CODE (TYPE) == RECORD_TYPE)) ? FASTEST_ALIGNMENT : (ALIGN))

*/ /* CHECK - btw code gets bigger with this one */

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

   when given unaligned data.  */

#define STRICT_ALIGNMENT 1 /* CHECK */

/* Align an address */

#define OR32_ALIGN(n,a) (((n) + (a) - 1) & ~((a) - 1))

/* Define this macro if an argument declared as `char' or `short' in a

   prototype should actually be passed as an `int'.  In addition to

   avoiding errors in certain cases of mismatch, it also makes for

   better code on certain machines. */

#define PROMOTE_PROTOTYPES  1

/* Define if operations between registers always perform the operation

   on the full register even if a narrower mode is specified.  */

#define WORD_REGISTER_OPERATIONS  /* CHECK */

/* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD

   will either zero-extend or sign-extend.  The value of this macro should

   be the code that says which one of the two operations is implicitly

   done, NIL if none.  */

#define LOAD_EXTEND_OP(MODE) ZERO_EXTEND

/* Define this macro if it is advisable to hold scalars in registers

   in a wider mode than that declared by the program.  In such cases,

   the value is constrained to be within the bounds of the declared

   type, but kept valid in the wider mode.  The signedness of the

   extension may differ from that of the type. */

#define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE)     \

  if (GET_MODE_CLASS (MODE) == MODE_INT         \

      && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \

    (MODE) = SImode;

  /* CHECK */

/* Define this if function arguments should also be promoted using the above

   procedure.  */

#define PROMOTE_FUNCTION_ARGS

/* Likewise, if the function return value is promoted.  */

#define PROMOTE_FUNCTION_RETURN

/*

 * brings 0.4% improvment in static size for linux

 *

#define PROMOTE_FOR_CALL_ONLY

*/

/* Define this macro if it is as good or better to call a constant

   function address than to call an address kept in a register.  */

#define NO_FUNCTION_CSE 1 /* check */

/* Define this macro if it is as good or better for a function to

   call itself with an explicit address than to call an address

   kept in a register.  */

#define NO_RECURSIVE_FUNCTION_CSE 1 /*check*/

/* 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 33

#define LAST_INT_REG (FIRST_PSEUDO_REGISTER - 1)

/* 1 for registers that have pervasive standard uses

   and are not available for the register allocator.

   On the or1k, these are r1 as stack pointer and

   r2 as frame/arg pointer.  */

#define FIXED_REGISTERS {1, 1, 1, 0, 0, 0, 0, 0,   0, 1, 0, 0, 0, 0, 0, 0, \

                         0, 0, 0, 0, 0, 0, 0, 0,   0, 0, 0, 0, 0, 0, 0, 0, 1}

/* 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, 1, 1, 1, 1, 1, 1,  1, 1, 0, 1, 0, 1, 0, 1, \

                             0, 1, 0, 1, 0, 1, 0, 1,  0, 1, 0, 1, 0, 1, 0, 1, 1}

/* stack pointer: must be FIXED and CALL_USED */

/* frame pointer: must be FIXED and CALL_USED */

/* 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.

   On the or1k, all registers are one word long.  */

#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) 1

/* 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)  1

/* A C expression returning the cost of moving data from a register of class

   CLASS1 to one of CLASS2.  */

#define REGISTER_MOVE_COST or32_register_move_cost

/* A C expressions returning the cost of moving data of MODE from a register to

   or from memory.  */

#define MEMORY_MOVE_COST or32_memory_move_cost

/* Specify the cost of a branch insn; roughly the number of extra insns that

   should be added to avoid a branch. */

#define BRANCH_COST or32_branch_cost()

/* 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 1

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

#define FRAME_POINTER_REGNUM 2

/* Link register. */

#define LINK_REGNUM 9

/* Value should be nonzero if functions must have frame pointers.

   Zero means the frame pointer need not be set up (and parms

   may be accessed via the stack pointer) in functions that seem suitable.

   This is computed in `reload', in reload1.c.  */

#define FRAME_POINTER_REQUIRED 0

/* De ne this macro if debugging can be performed even without a frame pointer.

   If this macro is de ned, GCC will turn on the `-fomit-frame-pointer' option

   whenever `-O' is specifed.

 */

/*

#define CAN_DEBUG_WITHOUT_FP

 */

#define INITIAL_FRAME_POINTER_OFFSET(DEPTH)                                             \

{ int regno;                                                                            \

  int offset = 0;                                                                        \

  for( regno=0; regno < FIRST_PSEUDO_REGISTER;  regno++ )                                \

    if( regs_ever_live[regno] && !call_used_regs[regno] )                               \

      offset += 4;                                                                      \

  (DEPTH) = (!current_function_is_leaf || regs_ever_live[LINK_REGNUM] ? 4 : 0)   +       \

                (frame_pointer_needed ? 4 : 0)                                   +       \

                offset                                                          +       \

                OR32_ALIGN(current_function_outgoing_args_size,4)               +       \

                OR32_ALIGN(get_frame_size(),4);                                         \

}

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

#define ARG_POINTER_REGNUM FRAME_POINTER_REGNUM

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

#define STATIC_CHAIN_REGNUM 0

/* Register in which address to store a structure value

   is passed to a function.  */

/*#define STRUCT_VALUE_REGNUM 0*/

/* Pass address of result struct to callee as "invisible" first argument */

#define STRUCT_VALUE 0

/* -----------------------[ PHX start ]-------------------------------- */

/* 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.

   GENERAL_REGS and BASE_REGS classess are the same on or32.

   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.  */

/* The or1k has only one kind of registers, so NO_REGS, GENERAL_REGS

   and ALL_REGS are the only classes.  */

enum reg_class

{

  NO_REGS,

  GENERAL_REGS,

  CR_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",                                                            \

  "GENERAL_REGS",                                                       \

  "ALL_REGS"                                                            \

}

/* Define which registers fit in which classes.

   This is an initializer for a vector of HARD_REG_SET

   of length N_REG_CLASSES.  */

/* An initializer containing the contents of the register classes,

   as integers which are bit masks.  The Nth integer specifies the

   contents of class N.  The way the integer MASK is interpreted is

   that register R is in the class if `MASK & (1 << R)' is 1.

   When the machine has more than 32 registers, an integer does not

   suffice.  Then the integers are replaced by sub-initializers,

   braced groupings containing several integers.  Each

   sub-initializer must be suitable as an initializer for the type

   `HARD_REG_SET' which is defined in `hard-reg-set.h'.  */

#define REG_CLASS_CONTENTS                           \

{                                                    \

  { 0x00000000, 0x00000000 }, /* NO_REGS */          \

  { 0xffffffff, 0x00000001 }, /* GENERAL_REGS */     \

  { 0xffffffff, 0x00000000 }  /* 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) < 32 ? GENERAL_REGS                   \

  : NO_REGS)

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

#define INDEX_REG_CLASS GENERAL_REGS

#define BASE_REG_CLASS GENERAL_REGS

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

#define REG_CLASS_FROM_LETTER(C) NO_REGS

#if 1

/* The letters I, J, K, L and M 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 CONST_OK_FOR_LETTER_P(VALUE, C)  \

    (  (C) == 'I' ? ((VALUE) >=-32768 && (VALUE) <=32767) \

     : (C) == 'J' ? ((VALUE) >=0 && (VALUE) <=0) \

     : (C) == 'K' ? ((VALUE) >=0 && (VALUE) <=65535) \

     : (C) == 'L' ? ((VALUE) >=0 && (VALUE) <=31) \

     : (C) == 'M' ? (((VALUE) & 0xffff) == 0 )           \

     : (C) == 'N' ? ((VALUE) >=-33554432 && (VALUE) <=33554431) \

     : (C) == 'O' ? ((VALUE) >=0 && (VALUE) <=0) \

     : 0 )

#else

/* The letters I, J, K, L, M, N, and 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.

   `I' is a signed 16-bit constant

   `J' is a constant with only the high-order 16 bits nonzero

   `K' is a constant with only the low-order 16 bits nonzero

   `L' is a signed 16-bit constant shifted left 16 bits

   `M' is a constant that is greater than 31

   `N' is a positive constant that is an exact power of two

   `O' is the constant zero

   `P' is a constant whose negation is a signed 16-bit constant */

#define CONST_OK_FOR_LETTER_P(VALUE, C)                                 \

   ( (C) == 'I' ? (unsigned HOST_WIDE_INT) ((VALUE) + 0x8000) < 0x10000 \

   : (C) == 'J' ? ((VALUE) & (~ (unsigned HOST_WIDE_INT) 0xffff0000)) == 0 \

   : (C) == 'K' ? ((VALUE) & (~ (HOST_WIDE_INT) 0xffff)) == 0            \

   : (C) == 'L' ? (((VALUE) & 0xffff) == 0                               \

                   && ((VALUE) >> 31 == -1 || (VALUE) >> 31 == 0))       \

   : (C) == 'M' ? (VALUE) > 31                                          \

   : (C) == 'N' ? (VALUE) > 0 && exact_log2 (VALUE) >= 0          \

   : (C) == 'O' ? (VALUE) == 0                                           \

   : (C) == 'P' ? (unsigned HOST_WIDE_INT) ((- (VALUE)) + 0x8000) < 0x10000 \

   : 0)

#endif

/* -----------------------[ PHX stop ]-------------------------------- */

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

   Here VALUE is the CONST_DOUBLE rtx itself.  */

#define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) 1

/* 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)  (CLASS)

/* Define the codes that are matched by predicates in or32.c.  */

#define PREDICATE_CODES                                                    \

  {"cc_reg_operand", {SUBREG, REG}},                                       \

  {"branch_comparison_operator", {EQ, NE, LE, LT, GE,                      \

                                  GT, LEU, LTU, GEU, GTU,                  \

                                  UNORDERED, ORDERED,                      \

                                  UNGE, UNLE }},                           \

  {"sibcall_insn_operand", {REG, SUBREG, SYMBOL_REF}},                     \

  {"input_operand", {SUBREG, REG, CONST_INT, MEM, CONST}},                 \

  {"sym_ref_mem_operand", {MEM} },

/* Return the maximum number of consecutive registers

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

/* On the or1k, this is always the size of MODE in words,

   since all registers are the same size.  */

#define CLASS_MAX_NREGS(CLASS, MODE)    \

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

/* 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 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

/* 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.  */

#define FIRST_PARM_OFFSET(FNDECL) 0

/* Define this if stack space is still allocated for a parameter passed

   in a register.  The value is the number of bytes allocated to this

   area.  */

/*

#define REG_PARM_STACK_SPACE(FNDECL) (UNITS_PER_WORD * GP_ARG_NUM_REG)

*/

/* Define this if the above stack space is to be considered part of the

   space allocated by the caller.  */

/*

#define OUTGOING_REG_PARM_STACK_SPACE

*/

/* Define this macro if `REG_PARM_STACK_SPACE' is defined, but the

   stack parameters don't skip the area specified by it. */

/*

#define STACK_PARMS_IN_REG_PARM_AREA

*/

/* Define this if the maximum size of all the outgoing args is to be

   accumulated and pushed during the prologue.  The amount can be

   found in the variable current_function_outgoing_args_size.  */

#define ACCUMULATE_OUTGOING_ARGS 1

/* Value is 1 if returning from a function call automatically

   pops the arguments described by the number-of-args field in the 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.

   On the Vax, the RET insn always pops all the args for any function.  */

/* SIMON */

/*#define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) (SIZE)*/

#define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) 0

/* Minimum and maximum general purpose registers used to hold arguments.  */

#define GP_ARG_MIN_REG 3

#define GP_ARG_MAX_REG 8

#define GP_ARG_NUM_REG (GP_ARG_MAX_REG - GP_ARG_MIN_REG + 1) 

/* Return registers */

#define GP_ARG_RETURN 11 

/* 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.  */

/* Return value is in R11.  */

#define FUNCTION_VALUE(VALTYPE, FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE))

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

   assuming the value has mode MODE.  */

/* Return value is in R11.  */

#define LIBCALL_VALUE(MODE)                                             \

  gen_rtx (REG,                                                         \

           ((GET_MODE_CLASS (MODE) != MODE_INT                          \

             || GET_MODE_SIZE (MODE) >= 4)                              \

            ? (MODE)                                                    \

            : SImode),                                                  \

            GP_ARG_RETURN)

/* Define this if PCC uses the nonreentrant convention for returning

   structure and union values.  */

/*#define PCC_STATIC_STRUCT_RETURN */

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

   R3 to R8 are possible (set to 1 in CALL_USED_REGISTERS)  */

#define FUNCTION_VALUE_REGNO_P(N)  ((N) == GP_ARG_RETURN)

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

#define FUNCTION_ARG_REGNO_P(N) \

   ((N) >= GP_ARG_MIN_REG && (N) <= GP_ARG_MAX_REG)

/* A code distinguishing the floating point format of the target

   machine.  There are three defined values: IEEE_FLOAT_FORMAT,

   VAX_FLOAT_FORMAT, and UNKNOWN_FLOAT_FORMAT.  */

#define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT

#define FLOAT_WORDS_BIG_ENDIAN 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 vax, this is a single integer, which is a number of bytes

   of arguments scanned so far.  */

#define CUMULATIVE_ARGS int

/* 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 vax, the offset starts at 0.  */

/* The regs member is an integer, the number of arguments got into

   registers so far.  */

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

 (CUM = 0)

/* Define intermediate macro to compute the size (in registers) of an argument

   for the or1k.  */

/* The ROUND_ADVANCE* macros are local to this file.  */

/* Round SIZE up to a word boundary.  */

#define ROUND_ADVANCE(SIZE) \

(((SIZE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)

/* Round arg MODE/TYPE up to the next word boundary.  */

#define ROUND_ADVANCE_ARG(MODE, TYPE) \

((MODE) == BLKmode                              \

 ? ROUND_ADVANCE (int_size_in_bytes (TYPE))     \

 : ROUND_ADVANCE (GET_MODE_SIZE (MODE)))

/* Round CUM up to the necessary point for argument MODE/TYPE.  */

/* This is either rounded to nearest reg or nearest double-reg boundary */

#define ROUND_ADVANCE_CUM(CUM, MODE, TYPE) \

((((MODE) == BLKmode ? TYPE_ALIGN (TYPE) : GET_MODE_BITSIZE (MODE)) \

  > BITS_PER_WORD)      \

 ? (((CUM) + 1) & ~1)   \

 : (CUM))

/* A C expression that indicates when an argument must be passed by

   reference.  If nonzero for an argument, a copy of that argument is

   made in memory and a pointer to the argument is passed instead of

   the argument itself.  The pointer is passed in whatever way is

   appropriate for passing a pointer to that type.  */

/* All aggregates and arguments greater than 8 bytes are passed this way.  */

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

(TYPE                                   \

 && (AGGREGATE_TYPE_P (TYPE)            \

     || int_size_in_bytes (TYPE) > 8))

/* 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.)  */

/* 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) = (ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE)) \

          + ROUND_ADVANCE_ARG ((MODE), (TYPE))))

/* Return boolean indicating arg of type TYPE and mode MODE will be passed in

   a reg.  This includes arguments that have to be passed by reference as the

   pointer to them is passed in a reg if one is available (and that is what

   we're given).

   When passing arguments NAMED is always 1.  When receiving arguments NAMED

   is 1 for each argument except the last in a stdarg/varargs function.  In

   a stdarg function we want to treat the last named arg as named.  In a

   varargs function we want to treat the last named arg (which is

   `__builtin_va_alist') as unnamed.

   This macro is only used in this file.  */

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

((NAMED)                                                                \

 && ((ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE))                         \

      + ROUND_ADVANCE_ARG ((MODE), (TYPE))                              \

      <= GP_ARG_NUM_REG)))

/* Determine where to put an argument 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 ARC the first MAX_ARC_PARM_REGS args are normally in registers

   and the rest are pushed.  */

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

(PASS_IN_REG_P ((CUM), (MODE), (TYPE), (NAMED))                         \

 ? gen_rtx_REG ((MODE), ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE)) + GP_ARG_MIN_REG)     \

 : 0)

/* For an arg passed partly in registers and partly in memory,

   this is the number of registers used.

   For args passed entirely in registers or entirely in memory, zero.  */

#define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED)      0

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

   for profiling a function entry.  */

#define FUNCTION_PROFILER(FILE, LABELNO)  \

   fprintf (FILE, "\tl.load32u\tr0,LP%d\n\tcall\tmcount\n", (LABELNO));

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