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/* score.h for Sunplus S+CORE processor

   Copyright (C) 2005, 2007, 2008, 2009 Free Software Foundation, Inc.

   Contributed by Sunnorth.

   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/>.  */

#include "score-conv.h"

/* Controlling the Compilation Driver.  */

#undef SWITCH_TAKES_ARG

#define SWITCH_TAKES_ARG(CHAR) \

  (DEFAULT_SWITCH_TAKES_ARG (CHAR) || (CHAR) == 'G')

#undef CPP_SPEC

#define CPP_SPEC                 "%{mscore3:-D__score3__} %{G*}"

#undef CC1_SPEC

#define CC1_SPEC                 "%{!mel:-meb} %{mel:-mel } \

%{!mscore*:-mscore7}    \

%{mscore3:-mscore3}     \

%{mscore3d:-mscore3d}   \

%{mscore7:-mscore7}     \

%{mscore7d:-mscore7d}   \

%{G*}"

#undef ASM_SPEC

#define ASM_SPEC                 "%{!mel:-EB} %{mel:-EL} \

%{!mscore*:-march=score7}         \

%{mscore7:-march=score7}          \

%{mscore7d:-march=score7}         \

%{mscore3:-march=score3}          \

%{mscore3d:-march=score3}         \

%{march=score5:-march=score7}     \

%{march=score5u:-march=score7}    \

%{march=score7:-march=score7}     \

%{march=score7d:-march=score7}    \

%{march=score3:-march=score3}     \

%{march=score3d:-march=score3}    \

%{G*}"

#undef LINK_SPEC

#define LINK_SPEC                "%{!mel:-EB} %{mel:-EL} \

%{!mscore*:-mscore7_elf}          \

%{mscore7:-mscore7_elf}           \

%{mscore7d:-mscore7_elf}          \

%{mscore3:-mscore3_elf}           \

%{mscore3d:-mscore3_elf}          \

%{march=score5:-mscore7_elf}      \

%{march=score5u:-mscore7_elf}     \

%{march=score7:-mscore7_elf}      \

%{march=score7d:-mscore7_elf}     \

%{march=score3:-mscore3_elf}      \

%{march=score3d:-mscore3_elf}     \

%{G*}"

/* Run-time Target Specification.  */

#define TARGET_CPU_CPP_BUILTINS()               \

  do {                                          \

    builtin_define ("SUNPLUS");                 \

    builtin_define ("__SCORE__");               \

    builtin_define ("__score__");               \

    if (TARGET_LITTLE_ENDIAN)                   \

      builtin_define ("__scorele__");           \

    else                                        \

      builtin_define ("__scorebe__");           \

    if (TARGET_SCORE5)                          \

      builtin_define ("__score5__");            \

    if (TARGET_SCORE5U)                         \

      builtin_define ("__score5u__");           \

    if (TARGET_SCORE7)                          \

      builtin_define ("__score7__");            \

    if (TARGET_SCORE7D)                         \

      builtin_define ("__score7d__");           \

    if (TARGET_SCORE3)                          \

      builtin_define ("__score3__");            \

    if (TARGET_SCORE3D)                         \

      builtin_define ("__score3d__");           \

  } while (0)

#define TARGET_DEFAULT         0

#define SCORE_GCC_VERSION      "1.6"

#define TARGET_VERSION \

      fprintf (stderr, "Sunplus S+core rev=%s", SCORE_GCC_VERSION);

#define OVERRIDE_OPTIONS       score_override_options ()

/* Show we can debug even without a frame pointer.  */

#define CAN_DEBUG_WITHOUT_FP

/* Target machine storage layout.  */

#define BITS_BIG_ENDIAN        0

#define BYTES_BIG_ENDIAN       (TARGET_LITTLE_ENDIAN == 0)

#define WORDS_BIG_ENDIAN       (TARGET_LITTLE_ENDIAN == 0)

/* Define this to set the endianness to use in libgcc2.c, which can

   not depend on target_flags.  */

#if defined(__scorele__)

#define LIBGCC2_WORDS_BIG_ENDIAN       0

#else

#define LIBGCC2_WORDS_BIG_ENDIAN       1

#endif

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

#define UNITS_PER_WORD                 4

/* 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;

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

#define PARM_BOUNDARY                  BITS_PER_WORD

#define STACK_BOUNDARY                 BITS_PER_WORD

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

#define FUNCTION_BOUNDARY              BITS_PER_WORD

/* There is no point aligning anything to a rounder boundary than this.  */

#define BIGGEST_ALIGNMENT              LONG_DOUBLE_TYPE_SIZE

/* If defined, a C expression to compute the alignment for a static

   variable.  TYPE is the data type, and ALIGN is the alignment that

   the object would ordinarily have.  The value of this macro is used

   instead of that alignment to align the object.

   If this macro is not defined, then ALIGN is used.

   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) < BITS_PER_WORD)                                            \

    && (TREE_CODE (TYPE) == ARRAY_TYPE                                   \

        || TREE_CODE (TYPE) == UNION_TYPE                                \

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

/* If defined, a C expression to compute the alignment given to a

   constant that is being placed in memory.  EXP is the constant

   and ALIGN is the alignment that the object would ordinarily have.

   The value of this macro is used instead of that alignment to align

   the object.

   If this macro is not defined, then ALIGN is used.

   The typical use of this macro is to increase alignment for string

   constants to be word aligned so that `strcpy' calls that copy

   constants can be done inline.  */

#define CONSTANT_ALIGNMENT(EXP, ALIGN)                                  \

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

   && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))

/* If defined, a C expression to compute the alignment for a local

   variable.  TYPE is the data type, and ALIGN is the alignment that

   the object would ordinarily have.  The value of this macro is used

   instead of that alignment to align the object.

   If this macro is not defined, then ALIGN is used.

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

   data to make it all fit in fewer cache lines.  */

#define LOCAL_ALIGNMENT(TYPE, ALIGN)                                    \

  ((TREE_CODE (TYPE) == ARRAY_TYPE                                      \

    && TYPE_MODE (TREE_TYPE (TYPE)) == QImode                           \

    && (ALIGN) < BITS_PER_WORD) ? BITS_PER_WORD : (ALIGN))

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

#define EMPTY_FIELD_BOUNDARY           32

/* All accesses must be aligned.  */

#define STRICT_ALIGNMENT               1

/* Score requires that structure alignment is affected by bitfields.  */

#define PCC_BITFIELD_TYPE_MATTERS      1

/* long double is not a fixed mode, but the idea is that, if we

   support long double, we also want a 128-bit integer type.  */

#define MAX_FIXED_MODE_SIZE            LONG_DOUBLE_TYPE_SIZE

/* Layout of Data Type.  */

/* Set the sizes of the core types.  */

#define INT_TYPE_SIZE                   32

#define SHORT_TYPE_SIZE                 16

#define LONG_TYPE_SIZE                  32

#define LONG_LONG_TYPE_SIZE             64

#define CHAR_TYPE_SIZE                  8

#define FLOAT_TYPE_SIZE                 32

#define DOUBLE_TYPE_SIZE                64

#define LONG_DOUBLE_TYPE_SIZE           64

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

#undef DEFAULT_SIGNED_CHAR

#define DEFAULT_SIGNED_CHAR             1

/* Default definitions for size_t and ptrdiff_t.  */

#define SIZE_TYPE                       "unsigned int"

#define UINTPTR_TYPE                    "long unsigned int"

/* Register Usage

   S+core have:

   - 32 integer registers

   - 16 control registers (cond)

   - 16 special registers (ceh/cel/cnt/lcr/scr/arg/fp)

   - 32 coprocessors 1 registers

   - 32 coprocessors 2 registers

   - 32 coprocessors 3 registers.  */

#define FIRST_PSEUDO_REGISTER           160

/* By default, fix the kernel registers (r30 and r31), the global

   pointer (r28) and the stack pointer (r0).  This can change

   depending on the command-line options.

   Regarding coprocessor registers: without evidence to the contrary,

   it's best to assume that each coprocessor register has a unique

   use.  This can be overridden, in, e.g., override_options() or

   CONDITIONAL_REGISTER_USAGE should the assumption be inappropriate

   for a particular target.  */

/* Control Registers, use mfcr/mtcr insn

    32        cr0         PSR

    33        cr1         Condition

    34        cr2         ECR

    35        cr3         EXCPVec

    36        cr4         CCR

    37        cr5         EPC

    38        cr6         EMA

    39        cr7         TLBLock

    40        cr8         TLBPT

    41        cr8         PEADDR

    42        cr10        TLBRPT

    43        cr11        PEVN

    44        cr12        PECTX

    45        cr13

    46        cr14

    47        cr15

    Custom Engine Register, use mfce/mtce

    48        CEH        CEH

    49        CEL        CEL

    Special-Purpose Register, use mfsr/mtsr

    50        sr0        CNT

    51        sr1        LCR

    52        sr2        SCR

    53        ARG_POINTER_REGNUM

    54        FRAME_POINTER_REGNUM

    but Control register have 32 registers, cr16-cr31.  */

#define FIXED_REGISTERS                                  \

{                                                        \

  /* General Purpose Registers  */                       \

  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, 1, 1, 1, 1,        \

  /* Control Registers  */                               \

  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,        \

  /* CEH/ CEL/ CNT/ LCR/ SCR / ARG_POINTER_REGNUM/ FRAME_POINTER_REGNUM */\

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

  /* CP 1 Registers  */                                  \

  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,        \

  /* CP 2 Registers  */                                  \

  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,        \

  /* CP 3 Registers  */                                  \

  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,        \

}

#define CALL_USED_REGISTERS                              \

{                                                        \

  /* General purpose register  */                        \

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

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

  /* Control Registers  */                               \

  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,        \

  /* CP 1 Registers  */                                  \

  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,        \

  /* CP 2 Registers  */                                  \

  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,        \

  /* CP 3 Registers  */                                  \

  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,        \

}

#define REG_ALLOC_ORDER                                                   \

{   0,  1,  6,  7,  8,  9, 10, 11,  4,  5, 22, 23, 24, 25, 26, 27,        \

   12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 28, 29, 30, 31,  2,  3,        \

   32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,        \

   48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,        \

   64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,        \

   80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,        \

   96, 97, 98, 99,100,101,102,103,104,105,106,107,108,109,110,111,        \

  112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,        \

  128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,        \

  144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159        }

/* Macro to conditionally modify fixed_regs/call_used_regs.  */

#define PIC_OFFSET_TABLE_REGNUM          29

#define CONDITIONAL_REGISTER_USAGE                     \

{                                                      \

   if (!flag_pic)                                      \

     fixed_regs[PIC_OFFSET_TABLE_REGNUM] =             \

     call_used_regs[PIC_OFFSET_TABLE_REGNUM] = 0;      \

}

#define HARD_REGNO_NREGS(REGNO, MODE) \

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

/* Return true if REGNO is suitable for holding a quantity of type MODE.  */

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

/* 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)                             \

  ((GET_MODE_CLASS (MODE1) == MODE_FLOAT                          \

    || GET_MODE_CLASS (MODE1) == MODE_COMPLEX_FLOAT)              \

   == (GET_MODE_CLASS (MODE2) == MODE_FLOAT                       \

       || GET_MODE_CLASS (MODE2) == MODE_COMPLEX_FLOAT))

/* Register Classes.  */

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

   machine description.  Also define ranges of constants.  */

enum reg_class

{

  NO_REGS,

  G16_REGS,    /* r0 ~ r15 */

  G32_REGS,    /* r0 ~ r31 */

  T32_REGS,    /* r8 ~ r11 | r22 ~ r27 */

  HI_REG,      /* hi                 */

  LO_REG,      /* lo                 */

  CE_REGS,     /* hi + lo            */

  CN_REG,      /* cnt                */

  LC_REG,      /* lcb                */

  SC_REG,      /* scb                */

  SP_REGS,     /* cnt + lcb + scb    */

  CR_REGS,     /* cr0 - cr15         */

  CP1_REGS,    /* cp1                */

  CP2_REGS,    /* cp2                */

  CP3_REGS,    /* cp3                */

  CPA_REGS,    /* cp1 + cp2 + cp3    */

  ALL_REGS,

  LIM_REG_CLASSES

};

#define N_REG_CLASSES                  ((int) LIM_REG_CLASSES)

#define GENERAL_REGS                   G32_REGS

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

#define REG_CLASS_NAMES           \

{                                 \

  "NO_REGS",                      \

  "G16_REGS",                     \

  "G32_REGS",                     \

  "T32_REGS",                     \

                                  \

  "HI_REG",                       \

  "LO_REG",                       \

  "CE_REGS",                      \

                                  \

  "CN_REG",                       \

  "LC_REG",                       \

  "SC_REG",                       \

  "SP_REGS",                      \

                                  \

  "CR_REGS",                      \

                                  \

  "CP1_REGS",                     \

  "CP2_REGS",                     \

  "CP3_REGS",                     \

  "CPA_REGS",                     \

                                  \

  "ALL_REGS",                     \

}

/* Define which registers fit in which classes.  */

#define REG_CLASS_CONTENTS                                        \

{                                                                 \

  /* NO_REGS/G16/G32/T32  */                                      \

  { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000},  \

  { 0x0000ffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000},  \

  { 0xffffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000},  \

  { 0x0fc00f00, 0x00000000, 0x00000000, 0x00000000, 0x00000000},  \

  /* HI/LO/CE  */                                                 \

  { 0x00000000, 0x00010000, 0x00000000, 0x00000000, 0x00000000},  \

  { 0x00000000, 0x00020000, 0x00000000, 0x00000000, 0x00000000},  \

  { 0x00000000, 0x00030000, 0x00000000, 0x00000000, 0x00000000},  \

  /* CN/LC/SC/SP/CR  */                                           \

  { 0x00000000, 0x00040000, 0x00000000, 0x00000000, 0x00000000},  \

  { 0x00000000, 0x00080000, 0x00000000, 0x00000000, 0x00000000},  \

  { 0x00000000, 0x00100000, 0x00000000, 0x00000000, 0x00000000},  \

  { 0x00000000, 0x001c0000, 0x00000000, 0x00000000, 0x00000000},  \

  { 0x00000000, 0x0000ffff, 0x00000000, 0x00000000, 0x00000000},  \

  /* CP1/CP2/CP3/CPA  */                                          \

  { 0x00000000, 0x00000000, 0xffffffff, 0x00000000, 0x00000000},  \

  { 0x00000000, 0x00000000, 0x00000000, 0xffffffff, 0x00000000},  \

  { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0xffffffff},  \

  { 0x00000000, 0x00000000, 0xffffffff, 0xffffffff, 0xffffffff},  \

  /* ALL_REGS  */                                                 \

  { 0xffffffff, 0x001fffff, 0xffffffff, 0xffffffff, 0xffffffff},  \

}

/* A C expression whose value is a register class containing hard

   register REGNO.  In general there is more that one such class;

   choose a class which is "minimal", meaning that no smaller class

   also contains the register.  */

#define REGNO_REG_CLASS(REGNO)         score_reg_class (REGNO)

/* The following macro defines cover classes for Integrated Register

   Allocator.  Cover classes is a set of non-intersected register

   classes covering all hard registers used for register allocation

   purpose.  Any move between two registers of a cover class should be

   cheaper than load or store of the registers.  The macro value is

   array of register classes with LIM_REG_CLASSES used as the end

   marker.  */

#define IRA_COVER_CLASSES                                       \

{                                                               \

  G32_REGS, CE_REGS, SP_REGS, LIM_REG_CLASSES                   \

}

/* A macro whose definition is the name of the class to which a

   valid base register must belong.  A base register is one used in

   an address which is the register value plus a displacement.  */

#define BASE_REG_CLASS                 G16_REGS

/* The class value for index registers.  */

#define INDEX_REG_CLASS                NO_REGS

extern enum reg_class score_char_to_class[256];

#define REG_CLASS_FROM_LETTER(C)       score_char_to_class[(unsigned char) (C)]

/* Addressing modes, and classification of registers for them.  */

#define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \

  score_regno_mode_ok_for_base_p (REGNO, 1)

#define REGNO_OK_FOR_INDEX_P(NUM)       0

#define PREFERRED_RELOAD_CLASS(X, CLASS) \

  score_preferred_reload_class (X, CLASS)

/* If we need to load shorts byte-at-a-time, then we need a scratch.  */

#define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \

  score_secondary_reload_class (CLASS, MODE, X)

/* Return the register class of a scratch register needed to copy IN into

   or out of a register in CLASS in MODE.  If it can be done directly,

   NO_REGS is returned.  */

#define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \

  score_secondary_reload_class (CLASS, MODE, X)

/* 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)

#define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS)    \

  (GET_MODE_SIZE (FROM) != GET_MODE_SIZE (TO)        \

   ? reg_classes_intersect_p (HI_REG, (CLASS)) : 0)

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

#define CONST_OK_FOR_LETTER_P(VALUE, C) score_const_ok_for_letter_p (VALUE, C)

/* 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)        \

  ((C) == 'G' && (VALUE) == CONST0_RTX (GET_MODE (VALUE)))

/* Letters in the range `Q' through `U' may be defined in a

   machine-dependent fashion to stand for arbitrary operand types.

   The machine description macro `EXTRA_CONSTRAINT' is passed the

   operand as its first argument and the constraint letter as its

   second operand.  */

#define EXTRA_CONSTRAINT(VALUE, C)      score_extra_constraint (VALUE, C)

/* Basic Stack Layout.  */

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

#define STACK_GROWS_DOWNWARD

#define STACK_PUSH_CODE                 PRE_DEC

#define STACK_POP_CODE                  POST_INC

/* The offset of the first local variable from the beginning of the frame.

   See compute_frame_size for details about the frame layout.  */

#define STARTING_FRAME_OFFSET           crtl->outgoing_args_size

/* The argument pointer always points to the first argument.  */

#define FIRST_PARM_OFFSET(FUNDECL)      0

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

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

#define RETURN_ADDR_RTX(count, frame)   score_return_addr (count, frame)

/* Pick up the return address upon entry to a procedure.  */

#define INCOMING_RETURN_ADDR_RTX        gen_rtx_REG (VOIDmode, RA_REGNUM)

/* Exception handling Support.  */

/* Use r0 to r3 to pass exception handling information.  */

#define EH_RETURN_DATA_REGNO(N) \

  ((N) < 4 ? (N) + ARG_REG_FIRST : INVALID_REGNUM)

/* The register that holds the return address in exception handlers.  */

#define EH_RETURN_STACKADJ_RTX          gen_rtx_REG (Pmode, EH_REGNUM)

/* Registers That Address the Stack Frame.  */

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

#define STACK_POINTER_REGNUM            SP_REGNUM

/* These two registers don't really exist: they get eliminated to either

   the stack or hard frame pointer.  */

#define FRAME_POINTER_REGNUM            53

/*  we use r2 as the frame pointer.  */

#define HARD_FRAME_POINTER_REGNUM       FP_REGNUM

#define ARG_POINTER_REGNUM              54

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

#define STATIC_CHAIN_REGNUM             23

/* Elimination Frame Pointer and Arg Pointer  */

#define ELIMINABLE_REGS                                \

  {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM},        \

   { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM},   \

   { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM},      \

   { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}}

#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \

  (OFFSET) = score_initial_elimination_offset ((FROM), (TO))

/* Passing Function Arguments on the Stack.  */

/* Allocate stack space for arguments at the beginning of each function.  */

#define ACCUMULATE_OUTGOING_ARGS        1

/* reserve stack space for all argument registers.  */

#define REG_PARM_STACK_SPACE(FNDECL)    UNITS_PER_WORD

/* Define this if it is the responsibility of the caller to

   allocate the area reserved for arguments passed in registers.

   If `ACCUMULATE_OUTGOING_ARGS' is also defined, the only effect

   of this macro is to determine whether the space is included in

   `crtl->outgoing_args_size'.  */

#define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 1

#define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0

/* Passing Arguments in Registers  */

/* 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).  */

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

  score_function_arg (&CUM, MODE, TYPE, NAMED)

/* A C type for declaring a variable that is used as the first argument of

   `FUNCTION_ARG' and other related values.  For some target machines, the

   type `int' suffices and can hold the number of bytes of argument so far.  */

typedef struct score_args

{

  unsigned int arg_number;             /* how many arguments have been seen  */

  unsigned int num_gprs;               /* number of gprs in use  */

  unsigned int stack_words;            /* number of words in stack  */

} score_args_t;

#define CUMULATIVE_ARGS                score_args_t

/* 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.  */

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

  score_init_cumulative_args (&CUM, FNTYPE, LIBNAME)

/* 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) \

  score_function_arg_advance (&CUM, MODE, TYPE, NAMED)

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

   We have no FP argument registers when soft-float.  When FP registers

   are 32 bits, we can't directly reference the odd numbered ones.  */

#define FUNCTION_ARG_REGNO_P(REGNO) \

  REG_CONTAIN (REGNO, ARG_REG_FIRST, ARG_REG_NUM)

/* How Scalar Function Values Are Returned.  */

#define FUNCTION_VALUE(VALTYPE, FUNC) \

  score_function_value ((VALTYPE), (FUNC), VOIDmode)

#define LIBCALL_VALUE(MODE)  score_function_value (NULL_TREE, NULL, (MODE))

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

#define FUNCTION_VALUE_REGNO_P(REGNO)   ((REGNO) == (ARG_REG_FIRST))

#define PIC_FUNCTION_ADDR_REGNUM        (GP_REG_FIRST + 25)

/* How Large Values Are Returned.  */

#define STRUCT_VALUE                    0

/* Function Entry and Exit  */

/* 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

/* Generating Code for Profiling  */

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

   for profiling a function entry.  */

#define FUNCTION_PROFILER(FILE, LABELNO)                              \

  do {                                                                \

    if (TARGET_SCORE7)                                                \

      {                                                               \

        fprintf (FILE, " .set r1  \n");                               \

        fprintf (FILE, " mv   r%d,r%d \n", AT_REGNUM, RA_REGNUM);     \

        fprintf (FILE, " subi r%d, %d \n", STACK_POINTER_REGNUM, 8);  \

        fprintf (FILE, " jl   _mcount \n");                           \

        fprintf (FILE, " .set nor1 \n");                              \

      }                                                               \

    else if (TARGET_SCORE3)                                           \

      {                                                               \

        fprintf (FILE, " .set r1  \n");                               \

        fprintf (FILE, " mv!   r%d,r%d \n", AT_REGNUM, RA_REGNUM);    \

        fprintf (FILE, " addi! r%d, %d \n", STACK_POINTER_REGNUM, -8);\

        fprintf (FILE, " jl   _mcount \n");                           \

        fprintf (FILE, " .set nor1 \n");                              \

      }                                                               \

  } while (0)

/* Trampolines for Nested Functions.  */

#define TRAMPOLINE_INSNS                6

/* A C expression for the size in bytes of the trampoline, as an integer.  */

#define TRAMPOLINE_SIZE                (24 + GET_MODE_SIZE (ptr_mode) * 2)

#define HAVE_PRE_INCREMENT              1

#define HAVE_PRE_DECREMENT              1

#define HAVE_POST_INCREMENT             1

#define HAVE_POST_DECREMENT             1

#define HAVE_PRE_MODIFY_DISP            1

#define HAVE_POST_MODIFY_DISP           1

#define HAVE_PRE_MODIFY_REG             0

#define HAVE_POST_MODIFY_REG            0

/* Maximum number of registers that can appear in a valid memory address.  */

#define MAX_REGS_PER_ADDRESS            1

/* 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 all.

   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.

   Some source files that are used after register allocation

   need to be strict.  */

#ifndef REG_OK_STRICT

#define REG_MODE_OK_FOR_BASE_P(X, MODE) \

  score_regno_mode_ok_for_base_p (REGNO (X), 0)

#else

#define REG_MODE_OK_FOR_BASE_P(X, MODE) \

  score_regno_mode_ok_for_base_p (REGNO (X), 1)

#endif

#define REG_OK_FOR_INDEX_P(X) 0

#define LEGITIMATE_CONSTANT_P(X)        1

/* Condition Code Status.  */

#define SELECT_CC_MODE(OP, X, Y)        score_select_cc_mode (OP, X, Y)

/* Return nonzero if SELECT_CC_MODE will never return MODE for a

   floating point inequality comparison.  */

#define REVERSIBLE_CC_MODE(MODE)        1

/* Describing Relative Costs of Operations  */

/* Compute extra cost of moving data between one register class and another.  */

#define REGISTER_MOVE_COST(MODE, FROM, TO) \

  score_register_move_cost (MODE, FROM, TO)

/* Moves to and from memory are quite expensive */

#define MEMORY_MOVE_COST(MODE, CLASS, TO_P) \

  (4 + memory_move_secondary_cost ((MODE), (CLASS), (TO_P)))

/* Try to generate sequences that don't involve branches.  */

#define BRANCH_COST(speed_p, predictable_p) 2

/* Nonzero if access to memory by bytes is slow and undesirable.  */

#define SLOW_BYTE_ACCESS                1

/* 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

/* Dividing the Output into Sections (Texts, Data, ...).  */

/* Define the strings to put out for each section in the object file.  */

#define TEXT_SECTION_ASM_OP             "\t.text"

#define DATA_SECTION_ASM_OP             "\t.data"

#define SDATA_SECTION_ASM_OP            "\t.sdata"

#undef  READONLY_DATA_SECTION_ASM_OP

#define READONLY_DATA_SECTION_ASM_OP    "\t.rdata"

/* The Overall Framework of an Assembler File  */

/* How to start an assembler comment.

   The leading space is important.  */

#define ASM_COMMENT_START               "#"

/* Output to assembler file text saying following lines

   may contain character constants, extra white space, comments, etc.  */

#define ASM_APP_ON                     "#APP\n\t.set volatile\n"

/* Output to assembler file text saying following lines

   no longer contain unusual constructs.  */

#define ASM_APP_OFF                     "#NO_APP\n\t.set optimize\n"

/* Output of Uninitialized Variables.  */

/* This says how to define a global common symbol.  */

#define ASM_OUTPUT_ALIGNED_DECL_COMMON(STREAM, DECL, NAME, SIZE, ALIGN)     \

  do {                                                                      \

    fputs ("\n\t.comm\t", STREAM);                                          \

    assemble_name (STREAM, NAME);                                           \

    fprintf (STREAM, " , " HOST_WIDE_INT_PRINT_UNSIGNED ", %u\n",           \

             SIZE, ALIGN / BITS_PER_UNIT);                                  \

  } while (0)

/* This says how to define a local common symbol (i.e., not visible to

   linker).  */

#undef ASM_OUTPUT_ALIGNED_LOCAL

#define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN)                 \

  do {                                                                      \

    fputs ("\n\t.lcomm\t", STREAM);                                         \

    assemble_name (STREAM, NAME);                                           \

    fprintf (STREAM, " , " HOST_WIDE_INT_PRINT_UNSIGNED ", %u\n",           \

             SIZE, ALIGN / BITS_PER_UNIT);                                  \

  } while (0)

/* Globalizing directive for a label.  */

#define GLOBAL_ASM_OP                   "\t.globl\t"

/* Output and Generation of Labels  */

/* This is how to declare a function name.  The actual work of

   emitting the label is moved to function_prologue, so that we can

   get the line number correctly emitted before the .ent directive,

   and after any .file directives.  Define as empty so that the function

   is not declared before the .ent directive elsewhere.  */

#undef ASM_DECLARE_FUNCTION_NAME

#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)

#undef ASM_DECLARE_OBJECT_NAME

#define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL)   \

  do {                                                \

    assemble_name (STREAM, NAME);                     \

    fprintf (STREAM, ":\n");                          \

  } while (0)

/* This says how to output an external.  It would be possible not to

   output anything and let undefined symbol become external. However

   the assembler uses length information on externals to allocate in

   data/sdata bss/sbss, thereby saving exec time.  */

#undef ASM_OUTPUT_EXTERNAL

#define ASM_OUTPUT_EXTERNAL(STREAM, DECL, NAME) \

  score_output_external (STREAM, DECL, NAME)

/* This handles the magic '..CURRENT_FUNCTION' symbol, which means

   'the start of the function that this code is output in'.  */

#define ASM_OUTPUT_LABELREF(STREAM, NAME) \

  fprintf ((STREAM), "%s", (NAME))

/* Local compiler-generated symbols must have a prefix that the assembler

   understands.  */

#define LOCAL_LABEL_PREFIX              (TARGET_SCORE7 ? "." : "$")

#undef ASM_GENERATE_INTERNAL_LABEL

#define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \

  sprintf ((LABEL), "*%s%s%ld", (LOCAL_LABEL_PREFIX), (PREFIX), (long) (NUM))

/* Output of Assembler Instructions.  */

#define REGISTER_NAMES                                                    \

{ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",                         \

  "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",                   \

  "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",                 \

  "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",                 \

                                                                          \

  "cr0", "cr1", "cr2", "cr3", "cr4", "cr5", "cr6", "cr7",                 \

  "cr8", "cr9", "cr10", "cr11", "cr12", "cr13", "cr14", "cr15",           \

                                                                          \

  "ceh", "cel", "sr0", "sr1", "sr2", "_arg", "_frame", "",                \

  "cr24", "cr25", "cr26", "cr27", "cr28", "cr29", "cr30", "cr31",         \

                                                                          \