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Annotation of gcc/config/i860.h, revision 1.1

1.1     ! root        1: /* Definitions of target machine for GNU compiler, for Intel 860.
        !             2:    Copyright (C) 1989, 1991 Free Software Foundation, Inc.
        !             3: 
        !             4:    Written by Richard Stallman ([email protected]).
        !             5: 
        !             6:    Hacked substantially by Ron Guilmette ([email protected]) to cater to
        !             7:    the whims of the System V Release 4 assembler.
        !             8: 
        !             9: This file is part of GNU CC.
        !            10: 
        !            11: GNU CC is free software; you can redistribute it and/or modify
        !            12: it under the terms of the GNU General Public License as published by
        !            13: the Free Software Foundation; either version 2, or (at your option)
        !            14: any later version.
        !            15: 
        !            16: GNU CC is distributed in the hope that it will be useful,
        !            17: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            18: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            19: GNU General Public License for more details.
        !            20: 
        !            21: You should have received a copy of the GNU General Public License
        !            22: along with GNU CC; see the file COPYING.  If not, write to
        !            23: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            24: 
        !            25: 
        !            26: /* Note that some other tm.h files include this one and then override
        !            27:    many of the definitions that relate to assembler syntax.  */
        !            28: 
        !            29: 
        !            30: /* Names to predefine in the preprocessor for this target machine.  */
        !            31: 
        !            32: #define CPP_PREDEFINES "-Di860 -Dunix"
        !            33: 
        !            34: /* Print subsidiary information on the compiler version in use.  */
        !            35: #define TARGET_VERSION fprintf (stderr, " (i860)");
        !            36: 
        !            37: /* Run-time compilation parameters selecting different hardware subsets
        !            38:    or supersets.
        !            39: 
        !            40:    On the i860, we have one: TARGET_XP.  This option allows gcc to generate
        !            41:    additional instructions available only on the newer i860 XP (but not on
        !            42:    the older i860 XR).
        !            43: */
        !            44: 
        !            45: extern int target_flags;
        !            46: 
        !            47: /* Nonzero if we should generate code to use the fpu.  */
        !            48: #define TARGET_XP (target_flags & 1)
        !            49: 
        !            50: /* Macro to define tables used to set the flags.
        !            51:    This is a list in braces of pairs in braces,
        !            52:    each pair being { "NAME", VALUE }
        !            53:    where VALUE is the bits to set or minus the bits to clear.
        !            54:    An empty string NAME is used to identify the default VALUE.  */
        !            55: 
        !            56: #define TARGET_SWITCHES  \
        !            57:   { {"xp", 1},                 \
        !            58:     {"noxp", -1},              \
        !            59:     {"xr", -1},                        \
        !            60:     { "", TARGET_DEFAULT}}
        !            61: 
        !            62: #define TARGET_DEFAULT 0
        !            63: 
        !            64: /* target machine storage layout */
        !            65: 
        !            66: /* Define this if most significant bit is lowest numbered
        !            67:    in instructions that operate on numbered bit-fields.
        !            68:    This is a moot question on the i860 due to the lack of bit-field insns.  */
        !            69: #define BITS_BIG_ENDIAN 0
        !            70: 
        !            71: /* Define this if most significant byte of a word is the lowest numbered.  */
        !            72: /* That is not true on i860 in the mode we will use.  */
        !            73: #define BYTES_BIG_ENDIAN 0
        !            74: 
        !            75: /* Define this if most significant word of a multiword number is the lowest
        !            76:    numbered.  */
        !            77: /* For the i860 this goes with BYTES_BIG_ENDIAN.  */
        !            78: #define WORDS_BIG_ENDIAN 0
        !            79: 
        !            80: /* number of bits in an addressible storage unit */
        !            81: #define BITS_PER_UNIT 8
        !            82: 
        !            83: /* Width in bits of a "word", which is the contents of a machine register.
        !            84:    Note that this is not necessarily the width of data type `int';
        !            85:    if using 16-bit ints on a 68000, this would still be 32.
        !            86:    But on a machine with 16-bit registers, this would be 16.  */
        !            87: #define BITS_PER_WORD 32
        !            88: 
        !            89: /* Width of a word, in units (bytes).  */
        !            90: #define UNITS_PER_WORD 4
        !            91: 
        !            92: /* Width in bits of a pointer.
        !            93:    See also the macro `Pmode' defined below.  */
        !            94: #define POINTER_SIZE 32
        !            95: 
        !            96: /* Allocation boundary (in *bits*) for storing arguments in argument list.  */
        !            97: #define PARM_BOUNDARY 32
        !            98: 
        !            99: /* Boundary (in *bits*) on which stack pointer should be aligned.  */
        !           100: #define STACK_BOUNDARY 128
        !           101: 
        !           102: /* Allocation boundary (in *bits*) for the code of a function.  */
        !           103: #define FUNCTION_BOUNDARY 64
        !           104: 
        !           105: /* Alignment of field after `int : 0' in a structure.  */
        !           106: #define EMPTY_FIELD_BOUNDARY 32
        !           107: 
        !           108: /* Every structure's size must be a multiple of this.  */
        !           109: #define STRUCTURE_SIZE_BOUNDARY 8
        !           110: 
        !           111: /* Minimum size in bits of the largest boundary to which any
        !           112:    and all fundamental data types supported by the hardware
        !           113:    might need to be aligned. No data type wants to be aligned
        !           114:    rounder than this.  The i860 supports 128-bit (long double)
        !           115:    floating point quantities, and the System V Release 4 i860
        !           116:    ABI requires these to be aligned to 16-byte (128-bit)
        !           117:    boundaries.  */
        !           118: #define BIGGEST_ALIGNMENT 128
        !           119: 
        !           120: /* Define this if move instructions will actually fail to work
        !           121:    when given unaligned data.  */
        !           122: #define STRICT_ALIGNMENT
        !           123: 
        !           124: /* If bit field type is int, dont let it cross an int,
        !           125:    and give entire struct the alignment of an int.  */
        !           126: #define PCC_BITFIELD_TYPE_MATTERS 1
        !           127: 
        !           128: /* Standard register usage.  */
        !           129: 
        !           130: /* Number of actual hardware registers.
        !           131:    The hardware registers are assigned numbers for the compiler
        !           132:    from 0 to just below FIRST_PSEUDO_REGISTER.
        !           133:    All registers that the compiler knows about must be given numbers,
        !           134:    even those that are not normally considered general registers.
        !           135: 
        !           136:    i860 has 32 fullword registers and 32 floating point registers.  */
        !           137: 
        !           138: #define FIRST_PSEUDO_REGISTER 64
        !           139: 
        !           140: /* 1 for registers that have pervasive standard uses
        !           141:    and are not available for the register allocator.
        !           142:    On the i860, this includes the always-0 registers
        !           143:    and fp, sp, arg pointer, and the return address.
        !           144:    Also r31, used for special purposes for constant addresses.  */
        !           145: #define FIXED_REGISTERS  \
        !           146:  {1, 1, 1, 1, 0, 0, 0, 0,      \
        !           147:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           148:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           149:   0, 0, 0, 0, 0, 0, 0, 1,      \
        !           150:   1, 1, 0, 0, 0, 0, 0, 0,      \
        !           151:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           152:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           153:   0, 0, 0, 0, 0, 0, 0, 0}
        !           154: 
        !           155: /* 1 for registers not available across function calls.
        !           156:    These must include the FIXED_REGISTERS and also any
        !           157:    registers that can be used without being saved.
        !           158:    On the i860, these are r0-r3, r16-r31, f0, f1, and f16-f31.  */
        !           159: #define CALL_USED_REGISTERS  \
        !           160:  {1, 1, 1, 1, 0, 0, 0, 0,      \
        !           161:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           162:   1, 1, 1, 1, 1, 1, 1, 1,      \
        !           163:   1, 1, 1, 1, 1, 1, 1, 1,      \
        !           164:   1, 1, 0, 0, 0, 0, 0, 0,      \
        !           165:   1, 1, 1, 1, 1, 1, 1, 1,      \
        !           166:   1, 1, 1, 1, 1, 1, 1, 1,      \
        !           167:   1, 1, 1, 1, 1, 1, 1, 1}
        !           168: 
        !           169: /* Try to get a non-preserved register before trying to get one we will
        !           170:    have to preserve.  Try to get an FP register only *after* trying to
        !           171:    get a general register, because it is relatively expensive to move
        !           172:    into or out of an FP register.  */
        !           173: 
        !           174: #define REG_ALLOC_ORDER                        \
        !           175:  {31, 30, 29, 28, 27, 26, 25, 24,      \
        !           176:   23, 22, 21, 20, 19, 18, 17, 16,      \
        !           177:   15, 14, 13, 12, 11, 10,  9,  8,      \
        !           178:    7,  6,  5,  4,  3,  2,  1,  0,      \
        !           179:   63, 62, 61, 60, 59, 58, 57, 56,      \
        !           180:   55, 54, 53, 52, 51, 50, 49, 48,      \
        !           181:   47, 46, 45, 44, 43, 42, 41, 40,      \
        !           182:   39, 38, 37, 36, 35, 34, 33, 32}
        !           183: 
        !           184: /* Return number of consecutive hard regs needed starting at reg REGNO
        !           185:    to hold something of mode MODE.
        !           186:    This is ordinarily the length in words of a value of mode MODE
        !           187:    but can be less for certain modes in special long registers.
        !           188: 
        !           189:    On the i860, all registers hold 32 bits worth.  */
        !           190: #define HARD_REGNO_NREGS(REGNO, MODE)   \
        !           191:   (((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
        !           192: 
        !           193: #define REGNO_MODE_ALIGNED(REGNO, MODE) \
        !           194:   (((REGNO) % ((GET_MODE_UNIT_SIZE (MODE) + 3) / 4)) == 0)
        !           195: 
        !           196: /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
        !           197: 
        !           198:    On the i860, we allow anything to go into any registers, but we require
        !           199:    any sort of value going into the FP registers to be properly aligned
        !           200:    (based on its size) within the FP register set.
        !           201: */
        !           202: #define HARD_REGNO_MODE_OK(REGNO, MODE)                                        \
        !           203:   (((REGNO) < 32)                                                      \
        !           204:    || ((MODE) == VOIDmode)                                             \
        !           205:    || REGNO_MODE_ALIGNED (REGNO, MODE))
        !           206: 
        !           207: /* Value is 1 if it is a good idea to tie two pseudo registers
        !           208:    when one has mode MODE1 and one has mode MODE2.
        !           209:    If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
        !           210:    for any hard reg, then this must be 0 for correct output.  */
        !           211: /* I think that is not always true; alignment restrictions for doubles
        !           212:    should not prevent tying them with singles.  So try allowing that.
        !           213:    On the other hand, don't let fixed and floating be tied;
        !           214:    this restriction is not necessary, but may make better code.  */
        !           215: #define MODES_TIEABLE_P(MODE1, MODE2) \
        !           216:   ((GET_MODE_CLASS (MODE1) == MODE_FLOAT               \
        !           217:     || GET_MODE_CLASS (MODE1) == MODE_COMPLEX_FLOAT)   \
        !           218:    == (GET_MODE_CLASS (MODE2) == MODE_FLOAT            \
        !           219:        || GET_MODE_CLASS (MODE2) == MODE_COMPLEX_FLOAT))
        !           220: 
        !           221: /* Specify the registers used for certain standard purposes.
        !           222:    The values of these macros are register numbers.  */
        !           223: 
        !           224: /* i860 pc isn't overloaded on a register that the compiler knows about.  */
        !           225: /* #define PC_REGNUM  */
        !           226: 
        !           227: /* Register to use for pushing function arguments.  */
        !           228: #define STACK_POINTER_REGNUM 2
        !           229: 
        !           230: /* Base register for access to local variables of the function.  */
        !           231: #define FRAME_POINTER_REGNUM 3
        !           232: 
        !           233: /* Value should be nonzero if functions must have frame pointers.
        !           234:    Zero means the frame pointer need not be set up (and parms
        !           235:    may be accessed via the stack pointer) in functions that seem suitable.
        !           236:    This is computed in `reload', in reload1.c.  */
        !           237: #define FRAME_POINTER_REQUIRED 1
        !           238: 
        !           239: /* Base register for access to arguments of the function.  */
        !           240: #define ARG_POINTER_REGNUM 28
        !           241: 
        !           242: /* Register in which static-chain is passed to a function.  */
        !           243: #define STATIC_CHAIN_REGNUM 29
        !           244: 
        !           245: /* Register in which address to store a structure value
        !           246:    is passed to a function.  */
        !           247: #define STRUCT_VALUE_REGNUM 16
        !           248: 
        !           249: /* Register to use when a source of a floating-point zero is needed.  */
        !           250: #define F0_REGNUM      32
        !           251: 
        !           252: /* Define the classes of registers for register constraints in the
        !           253:    machine description.  Also define ranges of constants.
        !           254: 
        !           255:    One of the classes must always be named ALL_REGS and include all hard regs.
        !           256:    If there is more than one class, another class must be named NO_REGS
        !           257:    and contain no registers.
        !           258: 
        !           259:    The name GENERAL_REGS must be the name of a class (or an alias for
        !           260:    another name such as ALL_REGS).  This is the class of registers
        !           261:    that is allowed by "g" or "r" in a register constraint.
        !           262:    Also, registers outside this class are allocated only when
        !           263:    instructions express preferences for them.
        !           264: 
        !           265:    The classes must be numbered in nondecreasing order; that is,
        !           266:    a larger-numbered class must never be contained completely
        !           267:    in a smaller-numbered class.
        !           268: 
        !           269:    For any two classes, it is very desirable that there be another
        !           270:    class that represents their union.  */
        !           271:    
        !           272: /* The i860 has two kinds of registers, hence four classes.  */
        !           273: 
        !           274: enum reg_class { NO_REGS, GENERAL_REGS, FP_REGS, ALL_REGS, LIM_REG_CLASSES };
        !           275: 
        !           276: #define N_REG_CLASSES (int) LIM_REG_CLASSES
        !           277: 
        !           278: /* Give names of register classes as strings for dump file.   */
        !           279: 
        !           280: #define REG_CLASS_NAMES \
        !           281:  {"NO_REGS", "GENERAL_REGS", "FP_REGS", "ALL_REGS" }
        !           282: 
        !           283: /* Define which registers fit in which classes.
        !           284:    This is an initializer for a vector of HARD_REG_SET
        !           285:    of length N_REG_CLASSES.  */
        !           286: 
        !           287: #define REG_CLASS_CONTENTS     \
        !           288:  {{0, 0}, {0xffffffff, 0},     \
        !           289:   {0, 0xffffffff}, {0xffffffff, 0xffffffff}}
        !           290: 
        !           291: /* The same information, inverted:
        !           292:    Return the class number of the smallest class containing
        !           293:    reg number REGNO.  This could be a conditional expression
        !           294:    or could index an array.  */
        !           295: 
        !           296: #define REGNO_REG_CLASS(REGNO) \
        !           297:  ((REGNO) >= 32 ? FP_REGS : GENERAL_REGS)
        !           298: 
        !           299: /* The class value for index registers, and the one for base regs.  */
        !           300: #define INDEX_REG_CLASS GENERAL_REGS
        !           301: #define BASE_REG_CLASS GENERAL_REGS
        !           302: 
        !           303: /* Get reg_class from a letter such as appears in the machine description.  */
        !           304: 
        !           305: #define REG_CLASS_FROM_LETTER(C) \
        !           306:   ((C) == 'f' ? FP_REGS : NO_REGS)
        !           307: 
        !           308: /* The letters I, J, K, L and M in a register constraint string
        !           309:    can be used to stand for particular ranges of immediate operands.
        !           310:    This macro defines what the ranges are.
        !           311:    C is the letter, and VALUE is a constant value.
        !           312:    Return 1 if VALUE is in the range specified by C.
        !           313: 
        !           314:    For the i860, `I' is used for the range of constants 
        !           315:    an add/subtract insn can actually contain.
        !           316:    But not including -0x8000, since we need
        !           317:    to negate the constant sometimes.
        !           318:    `J' is used for the range which is just zero (since that is R0).
        !           319:    `K' is used for the range allowed in bte.
        !           320:    `L' is used for the range allowed in logical insns.  */
        !           321: 
        !           322: #define SMALL_INT(X) ((unsigned) (INTVAL (X) + 0x7fff) < 0xffff)
        !           323: 
        !           324: #define LOGIC_INT(X) ((unsigned) INTVAL (X) < 0x10000)
        !           325: 
        !           326: #define SMALL_INTVAL(X) ((unsigned) ((X) + 0x7fff) < 0xffff)
        !           327: 
        !           328: #define LOGIC_INTVAL(X) ((unsigned) (X) < 0x10000)
        !           329: 
        !           330: #define CONST_OK_FOR_LETTER_P(VALUE, C)  \
        !           331:   ((C) == 'I' ? ((unsigned) (VALUE) + 0x7fff) < 0xffff \
        !           332:    : (C) == 'J' ? (VALUE) == 0                         \
        !           333:    : (C) == 'K' ? (unsigned) (VALUE) < 0x20    \
        !           334:    : (C) == 'L' ? (unsigned) (VALUE) < 0x10000 \
        !           335:    : 0)
        !           336: 
        !           337: /* Return non-zero if the given VALUE is acceptable for the
        !           338:    constraint letter C.  For the i860, constraint letter 'G'
        !           339:    permits only a floating-point zero value.  */
        !           340: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)         \
        !           341:   ((C) == 'G' && CONST_DOUBLE_LOW ((VALUE)) == 0       \
        !           342:    && CONST_DOUBLE_HIGH ((VALUE)) == 0)
        !           343: 
        !           344: /* Given an rtx X being reloaded into a reg required to be
        !           345:    in class CLASS, return the class of reg to actually use.
        !           346:    In general this is just CLASS; but on some machines
        !           347:    in some cases it is preferable to use a more restrictive class.
        !           348: 
        !           349:    If we are trying to put an integer constant into some register, prefer an
        !           350:    integer register to an FP register.  If we are trying to put a 
        !           351:    non-zero floating-point constant into some register, use an integer
        !           352:    register if the constant is SFmode and GENERAL_REGS is one of our options.
        !           353:    Otherwise, put the constant intoo memory.  */
        !           354: 
        !           355: #define PREFERRED_RELOAD_CLASS(X,CLASS)  \
        !           356:   ((CLASS) == ALL_REGS && GET_CODE (X) == CONST_INT ? GENERAL_REGS     \
        !           357:    : (GET_CODE (X) == CONST_DOUBLE                                     \
        !           358:       && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT                   \
        !           359:       && ! CONST_DOUBLE_OK_FOR_LETTER_P (X, 'G'))                      \
        !           360:    ? ((CLASS) == ALL_REGS && GET_MODE (X) == SFmode ? GENERAL_REGS     \
        !           361:       : (CLASS) == GENERAL_REGS && GET_MODE (X) == SFmode ? (CLASS)    \
        !           362:       : NO_REGS)                                                       \
        !           363:    : (CLASS))
        !           364: 
        !           365: /* Return the register class of a scratch register needed to copy IN into
        !           366:    a register in CLASS in MODE.  If it can be done directly, NO_REGS is
        !           367:    returned.  */
        !           368: 
        !           369: #define SECONDARY_INPUT_RELOAD_CLASS(CLASS,MODE,IN) \
        !           370:   ((CLASS) == FP_REGS && GET_CODE (IN) == CONST_INT ? GENERAL_REGS : NO_REGS)
        !           371: 
        !           372: /* Return the maximum number of consecutive registers
        !           373:    needed to represent mode MODE in a register of class CLASS.  */
        !           374: /* On the i860, this is the size of MODE in words.  */
        !           375: #define CLASS_MAX_NREGS(CLASS, MODE)   \
        !           376:   ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
        !           377: 
        !           378: /* Stack layout; function entry, exit and calling.  */
        !           379: 
        !           380: /* Define this if pushing a word on the stack
        !           381:    makes the stack pointer a smaller address.  */
        !           382: #define STACK_GROWS_DOWNWARD
        !           383: 
        !           384: /* Define this if the nominal address of the stack frame
        !           385:    is at the high-address end of the local variables;
        !           386:    that is, each additional local variable allocated
        !           387:    goes at a more negative offset in the frame.  */
        !           388: #define FRAME_GROWS_DOWNWARD
        !           389: 
        !           390: /* Offset within stack frame to start allocating local variables at.
        !           391:    If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
        !           392:    first local allocated.  Otherwise, it is the offset to the BEGINNING
        !           393:    of the first local allocated.  */
        !           394: #define STARTING_FRAME_OFFSET 0
        !           395: 
        !           396: /* If we generate an insn to push BYTES bytes,
        !           397:    this says how many the stack pointer really advances by.
        !           398:    On the i860, don't define this because there are no push insns.  */
        !           399: /*  #define PUSH_ROUNDING(BYTES) */
        !           400: 
        !           401: /* Offset of first parameter from the argument pointer register value.  */
        !           402: #define FIRST_PARM_OFFSET(FNDECL) 0
        !           403: 
        !           404: /* Value is the number of bytes of arguments automatically
        !           405:    popped when returning from a subroutine call.
        !           406:    FUNTYPE is the data type of the function (as a tree),
        !           407:    or for a library call it is an identifier node for the subroutine name.
        !           408:    SIZE is the number of bytes of arguments passed on the stack.  */
        !           409: 
        !           410: #define RETURN_POPS_ARGS(FUNTYPE,SIZE) 0
        !           411: 
        !           412: /* Define how to find the value returned by a function.
        !           413:    VALTYPE is the data type of the value (as a tree).
        !           414:    If the precise function being called is known, FUNC is its FUNCTION_DECL;
        !           415:    otherwise, FUNC is 0.  */
        !           416: 
        !           417: /* On the i860, the value register depends on the mode.  */
        !           418: 
        !           419: #define FUNCTION_VALUE(VALTYPE, FUNC)  \
        !           420:   gen_rtx (REG, TYPE_MODE (VALTYPE),                           \
        !           421:           (GET_MODE_CLASS (TYPE_MODE (VALTYPE)) == MODE_FLOAT  \
        !           422:            ? 40 : 16))
        !           423: 
        !           424: /* Define how to find the value returned by a library function
        !           425:    assuming the value has mode MODE.  */
        !           426: 
        !           427: #define LIBCALL_VALUE(MODE)                            \
        !           428:   gen_rtx (REG, MODE,                                  \
        !           429:           (GET_MODE_CLASS ((MODE)) == MODE_FLOAT       \
        !           430:            ? 40 : 16))
        !           431: 
        !           432: /* 1 if N is a possible register number for a function value
        !           433:    as seen by the caller.  */
        !           434: 
        !           435: #define FUNCTION_VALUE_REGNO_P(N) ((N) == 40 || (N) == 16)
        !           436: 
        !           437: /* 1 if N is a possible register number for function argument passing.
        !           438:    On the i860, these are r16-r27 and f8-f15.  */
        !           439: 
        !           440: #define FUNCTION_ARG_REGNO_P(N)                \
        !           441:   (((N) < 28 && (N) > 15) || ((N) < 48 && (N) >= 40))
        !           442: 
        !           443: /* Define a data type for recording info about an argument list
        !           444:    during the scan of that argument list.  This data type should
        !           445:    hold all necessary information about the function itself
        !           446:    and about the args processed so far, enough to enable macros
        !           447:    such as FUNCTION_ARG to determine where the next arg should go.
        !           448: 
        !           449:    On the i860, we must count separately the number of general registers used
        !           450:    and the number of float registers used.  */
        !           451: 
        !           452: struct cumulative_args { int ints, floats; };
        !           453: #define CUMULATIVE_ARGS struct cumulative_args
        !           454: 
        !           455: /* Initialize a variable CUM of type CUMULATIVE_ARGS
        !           456:    for a call to a function whose data type is FNTYPE.
        !           457:    For a library call, FNTYPE is 0.
        !           458: 
        !           459:    On the i860, the general-reg offset normally starts at 0,
        !           460:    but starts at 4 bytes
        !           461:    when the function gets a structure-value-address as an
        !           462:    invisible first argument.  */
        !           463: 
        !           464: #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME)       \
        !           465:  ((CUM).ints = ((FNTYPE) != 0 && aggregate_value_p ((FNTYPE)) \
        !           466:                ? 4 : 0),                       \
        !           467:   (CUM).floats = 0)
        !           468: 
        !           469: /* Machine-specific subroutines of the following macros.  */
        !           470: #define CEILING(X,Y)  (((X) + (Y) - 1) / (Y))
        !           471: #define ROUNDUP(X,Y)  (CEILING ((X), (Y)) * (Y))
        !           472: 
        !           473: /* Update the data in CUM to advance over an argument
        !           474:    of mode MODE and data type TYPE.
        !           475:    (TYPE is null for libcalls where that information may not be available.)
        !           476:    Floats, and doubleword ints, are returned in f regs;
        !           477:    other ints, in r regs.
        !           478:    Aggregates, even short ones, are passed in memory.  */
        !           479: 
        !           480: #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)           \
        !           481:  ((TYPE) != 0 && (TREE_CODE ((TYPE)) == RECORD_TYPE            \
        !           482:                  || TREE_CODE ((TYPE)) == UNION_TYPE)          \
        !           483:   ? 0                                                          \
        !           484:   : GET_MODE_CLASS ((MODE)) == MODE_FLOAT || (MODE) == DImode  \
        !           485:   ? ((CUM).floats = (ROUNDUP ((CUM).floats, GET_MODE_SIZE ((MODE)))    \
        !           486:                     + ROUNDUP (GET_MODE_SIZE (MODE), 4)))      \
        !           487:   : GET_MODE_CLASS ((MODE)) == MODE_INT                                \
        !           488:   ? ((CUM).ints = (ROUNDUP ((CUM).ints, GET_MODE_SIZE ((MODE))) \
        !           489:                   + ROUNDUP (GET_MODE_SIZE (MODE), 4)))        \
        !           490:   : 0)
        !           491: 
        !           492: /* Determine where to put an argument to a function.
        !           493:    Value is zero to push the argument on the stack,
        !           494:    or a hard register in which to store the argument.
        !           495: 
        !           496:    MODE is the argument's machine mode.
        !           497:    TYPE is the data type of the argument (as a tree).
        !           498:     This is null for libcalls where that information may
        !           499:     not be available.
        !           500:    CUM is a variable of type CUMULATIVE_ARGS which gives info about
        !           501:     the preceding args and about the function being called.
        !           502:    NAMED is nonzero if this argument is a named parameter
        !           503:     (otherwise it is an extra parameter matching an ellipsis).  */
        !           504: 
        !           505: /* On the i860, the first 12 words of integer arguments go in r16-r27,
        !           506:    and the first 8 words of floating arguments go in f8-f15.
        !           507:    DImode values are treated as floats.  */
        !           508: 
        !           509: #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED)           \
        !           510:  ((TYPE) != 0 && (TREE_CODE ((TYPE)) == RECORD_TYPE    \
        !           511:                  || TREE_CODE ((TYPE)) == UNION_TYPE)  \
        !           512:   ? 0                                                  \
        !           513:   : GET_MODE_CLASS ((MODE)) == MODE_FLOAT || (MODE) == DImode  \
        !           514:   ? (ROUNDUP ((CUM).floats, GET_MODE_SIZE ((MODE))) < 32       \
        !           515:      ? gen_rtx (REG, (MODE),                           \
        !           516:                40+(ROUNDUP ((CUM).floats,              \
        !           517:                             GET_MODE_SIZE ((MODE)))    \
        !           518:                    / 4))                               \
        !           519:      : 0)                                              \
        !           520:   : GET_MODE_CLASS ((MODE)) == MODE_INT                        \
        !           521:   ? (ROUNDUP ((CUM).ints, GET_MODE_SIZE ((MODE))) < 48 \
        !           522:      ? gen_rtx (REG, (MODE),                           \
        !           523:                16+(ROUNDUP ((CUM).ints,                \
        !           524:                             GET_MODE_SIZE ((MODE)))    \
        !           525:                    / 4))                               \
        !           526:      : 0)                                              \
        !           527:   : 0)
        !           528: 
        !           529: /* For an arg passed partly in registers and partly in memory,
        !           530:    this is the number of registers used.
        !           531:    For args passed entirely in registers or entirely in memory, zero.  */
        !           532: 
        !           533: #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) 0
        !           534: 
        !           535: /* If defined, a C expression that gives the alignment boundary, in
        !           536:    bits, of an argument with the specified mode and type.  If it is
        !           537:    not defined,  `PARM_BOUNDARY' is used for all arguments.  */
        !           538: 
        !           539: #define FUNCTION_ARG_BOUNDARY(MODE, TYPE)                      \
        !           540:   (((TYPE) != 0)                                               \
        !           541:    ? ((TYPE_ALIGN(TYPE) <= PARM_BOUNDARY)                      \
        !           542:       ? PARM_BOUNDARY                                          \
        !           543:       : TYPE_ALIGN(TYPE))                                      \
        !           544:    : ((GET_MODE_ALIGNMENT(MODE) <= PARM_BOUNDARY)              \
        !           545:       ? PARM_BOUNDARY                                          \
        !           546:       : GET_MODE_ALIGNMENT(MODE)))
        !           547: 
        !           548: /* This macro generates the assembly code for function entry.
        !           549: 
        !           550:    FILE is a stdio stream to output the code to.
        !           551:    SIZE is an int: how many units of temporary storage to allocate.
        !           552: */
        !           553: 
        !           554: #define FUNCTION_PROLOGUE(FILE, SIZE) function_prologue ((FILE), (SIZE))
        !           555: 
        !           556: /* Output a no-op just before the beginning of the function,
        !           557:    to ensure that there does not appear to be a delayed branch there.
        !           558:    Such a thing would confuse interrupt recovery.  */
        !           559: #define ASM_OUTPUT_FUNCTION_PREFIX(FILE,NAME) \
        !           560:   fprintf (FILE, "\tnop\n")
        !           561: 
        !           562: /* Output assembler code to FILE to increment profiler label # LABELNO
        !           563:    for profiling a function entry.  */
        !           564: 
        !           565: #define FUNCTION_PROFILER(FILE, LABELNO)  \
        !           566:    abort ();
        !           567: 
        !           568: /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
        !           569:    the stack pointer does not matter.  The value is tested only in
        !           570:    functions that have frame pointers.
        !           571:    No definition is equivalent to always zero.  */
        !           572: 
        !           573: #define EXIT_IGNORE_STACK 1
        !           574: 
        !           575: /* This macro generates the assembly code for function exit.
        !           576: 
        !           577:    FILE is a stdio stream to output the code to.
        !           578:    SIZE is an int: how many units of temporary storage to allocate.
        !           579: 
        !           580:    The function epilogue should not depend on the current stack pointer!
        !           581:    It should use the frame pointer only.  This is mandatory because
        !           582:    of alloca; we also take advantage of it to omit stack adjustments
        !           583:    before returning.
        !           584: */
        !           585: 
        !           586: #define FUNCTION_EPILOGUE(FILE, SIZE) function_epilogue ((FILE), (SIZE))
        !           587: 
        !           588: /* Store in the variable DEPTH the initial difference between the
        !           589:    frame pointer reg contents and the stack pointer reg contents,
        !           590:    as of the start of the function body.  This depends on the layout
        !           591:    of the fixed parts of the stack frame and on how registers are saved.
        !           592: 
        !           593:    On the i860, FRAME_POINTER_REQUIRED is always 1, so the definition of this
        !           594:    macro doesn't matter.  But it must be defined.  */
        !           595: 
        !           596: #define INITIAL_FRAME_POINTER_OFFSET(DEPTH) \
        !           597:   do { (DEPTH) = 0; } while (0)
        !           598: 
        !           599: /* Output assembler code for a block containing the constant parts
        !           600:    of a trampoline, leaving space for the variable parts.  */
        !           601: 
        !           602: /* On the i860, the trampoline contains five instructions:
        !           603:      orh #TOP_OF_FUNCTION,r0,r31
        !           604:      or #BOTTOM_OF_FUNCTION,r31,r31
        !           605:      orh #TOP_OF_STATIC,r0,r29
        !           606:      bri r31
        !           607:      or #BOTTOM_OF_STATIC,r29,r29  */
        !           608: #define TRAMPOLINE_TEMPLATE(FILE)                                      \
        !           609: {                                                                      \
        !           610:   ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0xec1f0000));    \
        !           611:   ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0xe7ff0000));    \
        !           612:   ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0xec1d0000));    \
        !           613:   ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x4000f800));    \
        !           614:   ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0xe7bd0000));    \
        !           615: }
        !           616: 
        !           617: /* Length in units of the trampoline for entering a nested function.  */
        !           618: 
        !           619: #define TRAMPOLINE_SIZE 20
        !           620: 
        !           621: /* Emit RTL insns to initialize the variable parts of a trampoline.
        !           622:    FNADDR is an RTX for the address of the function's pure code.
        !           623:    CXT is an RTX for the static chain value for the function.
        !           624: 
        !           625:    Store hi function at +0, low function at +4,
        !           626:    hi static at +8, low static at +16  */
        !           627: 
        !           628: #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)                      \
        !           629: {                                                                      \
        !           630:   rtx low_cxt = expand_shift (RSHIFT_EXPR, SImode, CXT,                        \
        !           631:                              size_int (16), 0, 0);                     \
        !           632:   rtx low_fn = expand_shift (RSHIFT_EXPR, SImode, FNADDR,              \
        !           633:                             size_int (16), 0, 0);                      \
        !           634:   emit_move_insn (gen_rtx (MEM, HImode, plus_constant (TRAMP, 16)),    \
        !           635:                  gen_rtx (SUBREG, HImode, CXT));                       \
        !           636:   emit_move_insn (gen_rtx (MEM, HImode, plus_constant (TRAMP, 4)),     \
        !           637:                  gen_rtx (SUBREG, HImode, FNADDR));                    \
        !           638:   emit_move_insn (gen_rtx (MEM, HImode, plus_constant (TRAMP, 8)),     \
        !           639:                  gen_rtx (SUBREG, HImode, low_cxt));                   \
        !           640:   emit_move_insn (gen_rtx (MEM, HImode, plus_constant (TRAMP, 0)),     \
        !           641:                  gen_rtx (SUBREG, HImode, low_fn));                    \
        !           642: }
        !           643: 
        !           644: /* Addressing modes, and classification of registers for them.  */
        !           645: 
        !           646: /* #define HAVE_POST_INCREMENT */
        !           647: /* #define HAVE_POST_DECREMENT */
        !           648: 
        !           649: /* #define HAVE_PRE_DECREMENT */
        !           650: /* #define HAVE_PRE_INCREMENT */
        !           651: 
        !           652: /* Macros to check register numbers against specific register classes.  */
        !           653: 
        !           654: /* These assume that REGNO is a hard or pseudo reg number.
        !           655:    They give nonzero only if REGNO is a hard reg of the suitable class
        !           656:    or a pseudo reg currently allocated to a suitable hard reg.
        !           657:    Since they use reg_renumber, they are safe only once reg_renumber
        !           658:    has been allocated, which happens in local-alloc.c.  */
        !           659: 
        !           660: #define REGNO_OK_FOR_INDEX_P(REGNO) \
        !           661: ((REGNO) < 32 || (unsigned) reg_renumber[REGNO] < 32)
        !           662: #define REGNO_OK_FOR_BASE_P(REGNO) \
        !           663: ((REGNO) < 32 || (unsigned) reg_renumber[REGNO] < 32)
        !           664: #define REGNO_OK_FOR_FP_P(REGNO) \
        !           665: (((REGNO) ^ 0x20) < 32 || (unsigned) (reg_renumber[REGNO] ^ 0x20) < 32)
        !           666: 
        !           667: /* Now macros that check whether X is a register and also,
        !           668:    strictly, whether it is in a specified class.
        !           669: 
        !           670:    These macros are specific to the i860, and may be used only
        !           671:    in code for printing assembler insns and in conditions for
        !           672:    define_optimization.  */
        !           673: 
        !           674: /* 1 if X is an fp register.  */
        !           675: 
        !           676: #define FP_REG_P(X) (REG_P (X) && REGNO_OK_FOR_FP_P (REGNO (X)))
        !           677: 
        !           678: /* Maximum number of registers that can appear in a valid memory address.  */
        !           679: 
        !           680: #define MAX_REGS_PER_ADDRESS 2
        !           681: 
        !           682: /* Recognize any constant value that is a valid address.  */
        !           683: 
        !           684: #define CONSTANT_ADDRESS_P(X)  CONSTANT_P (X)
        !           685: 
        !           686: /* Nonzero if the constant value X is a legitimate general operand.
        !           687:    It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.
        !           688: 
        !           689:    On the Sparc, this is anything but a CONST_DOUBLE.
        !           690:    Let's try permitting CONST_DOUBLEs and see what happens.  */
        !           691: 
        !           692: #define LEGITIMATE_CONSTANT_P(X) 1
        !           693: 
        !           694: /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
        !           695:    and check its validity for a certain class.
        !           696:    We have two alternate definitions for each of them.
        !           697:    The usual definition accepts all pseudo regs; the other rejects
        !           698:    them unless they have been allocated suitable hard regs.
        !           699:    The symbol REG_OK_STRICT causes the latter definition to be used.
        !           700: 
        !           701:    Most source files want to accept pseudo regs in the hope that
        !           702:    they will get allocated to the class that the insn wants them to be in.
        !           703:    Source files for reload pass need to be strict.
        !           704:    After reload, it makes no difference, since pseudo regs have
        !           705:    been eliminated by then.  */
        !           706: 
        !           707: #ifndef REG_OK_STRICT
        !           708: 
        !           709: /* Nonzero if X is a hard reg that can be used as an index
        !           710:    or if it is a pseudo reg.  */
        !           711: #define REG_OK_FOR_INDEX_P(X) (((unsigned) REGNO (X)) - 32 >= 14)
        !           712: /* Nonzero if X is a hard reg that can be used as a base reg
        !           713:    or if it is a pseudo reg.  */
        !           714: #define REG_OK_FOR_BASE_P(X) (((unsigned) REGNO (X)) - 32 >= 14)
        !           715: 
        !           716: #else
        !           717: 
        !           718: /* Nonzero if X is a hard reg that can be used as an index.  */
        !           719: #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
        !           720: /* Nonzero if X is a hard reg that can be used as a base reg.  */
        !           721: #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
        !           722: 
        !           723: #endif
        !           724: 
        !           725: /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
        !           726:    that is a valid memory address for an instruction.
        !           727:    The MODE argument is the machine mode for the MEM expression
        !           728:    that wants to use this address.
        !           729: 
        !           730:    On the i860, the actual addresses must be REG+REG or REG+SMALLINT.
        !           731:    But we can treat a SYMBOL_REF as legitimate if it is part of this
        !           732:    function's constant-pool, because such addresses can actually
        !           733:    be output as REG+SMALLINT.
        !           734: 
        !           735:    The displacement in an address must be a multiple of the alignment.
        !           736: 
        !           737:    Try making SYMBOL_REF (and other things which are CONSTANT_ADDRESS_P)
        !           738:    a legitimate address, regardless.  Because the only insns which can use
        !           739:    memory are load or store insns, the added hair in the machine description
        !           740:    is not that bad.  It should also speed up the compiler by halving the number
        !           741:    of insns it must manage for each (MEM (SYMBOL_REF ...)) involved.  */
        !           742: 
        !           743: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR)                \
        !           744: { if (GET_CODE (X) == REG)                             \
        !           745:     { if (REG_OK_FOR_BASE_P (X)) goto ADDR; }          \
        !           746:   else if (GET_CODE (X) == PLUS)                       \
        !           747:     {                                                  \
        !           748:       if (GET_CODE (XEXP (X, 0)) == REG                        \
        !           749:          && REG_OK_FOR_BASE_P (XEXP (X, 0)))           \
        !           750:        {                                               \
        !           751:          if (GET_CODE (XEXP (X, 1)) == CONST_INT       \
        !           752:              && INTVAL (XEXP (X, 1)) >= -0x8000        \
        !           753:              && INTVAL (XEXP (X, 1)) < 0x8000          \
        !           754:              && (INTVAL (XEXP (X, 1)) & (GET_MODE_SIZE (MODE) - 1)) == 0) \
        !           755:            goto ADDR;                                  \
        !           756:        }                                               \
        !           757:       else if (GET_CODE (XEXP (X, 1)) == REG           \
        !           758:          && REG_OK_FOR_BASE_P (XEXP (X, 1)))           \
        !           759:        {                                               \
        !           760:          if (GET_CODE (XEXP (X, 0)) == CONST_INT       \
        !           761:              && INTVAL (XEXP (X, 0)) >= -0x8000        \
        !           762:              && INTVAL (XEXP (X, 0)) < 0x8000          \
        !           763:              && (INTVAL (XEXP (X, 0)) & (GET_MODE_SIZE (MODE) - 1)) == 0) \
        !           764:            goto ADDR;                                  \
        !           765:        }                                               \
        !           766:     }                                                  \
        !           767:   else if (CONSTANT_ADDRESS_P (X))                     \
        !           768:     goto ADDR;                                         \
        !           769: }
        !           770: 
        !           771: /* Try machine-dependent ways of modifying an illegitimate address
        !           772:    to be legitimate.  If we find one, return the new, valid address.
        !           773:    This macro is used in only one place: `memory_address' in explow.c.
        !           774: 
        !           775:    OLDX is the address as it was before break_out_memory_refs was called.
        !           776:    In some cases it is useful to look at this to decide what needs to be done.
        !           777: 
        !           778:    MODE and WIN are passed so that this macro can use
        !           779:    GO_IF_LEGITIMATE_ADDRESS.
        !           780: 
        !           781:    It is always safe for this macro to do nothing.  It exists to recognize
        !           782:    opportunities to optimize the output.  */
        !           783: 
        !           784: /* On the i860, change COMPLICATED + CONSTANT to REG+CONSTANT.
        !           785:    Also change a symbolic constant to a REG,
        !           786:    though that may not be necessary.  */
        !           787: 
        !           788: #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN)    \
        !           789: { if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == MULT)  \
        !           790:     (X) = gen_rtx (PLUS, SImode, XEXP (X, 1),                  \
        !           791:                   force_operand (XEXP (X, 0), 0));             \
        !           792:   if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 1)) == MULT)  \
        !           793:     (X) = gen_rtx (PLUS, SImode, XEXP (X, 0),                  \
        !           794:                   force_operand (XEXP (X, 1), 0));             \
        !           795:   if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == PLUS)  \
        !           796:     (X) = gen_rtx (PLUS, SImode, XEXP (X, 1),                  \
        !           797:                   force_operand (XEXP (X, 0), 0));             \
        !           798:   if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 1)) == PLUS)  \
        !           799:     (X) = gen_rtx (PLUS, SImode, XEXP (X, 0),                  \
        !           800:                   force_operand (XEXP (X, 1), 0));             \
        !           801:   if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) != REG    \
        !           802:       && GET_CODE (XEXP (X, 0)) != CONST_INT)                  \
        !           803:     (X) = gen_rtx (PLUS, SImode, XEXP (X, 1),                  \
        !           804:                   copy_to_mode_reg (SImode, XEXP (X, 0)));     \
        !           805:   if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 1)) != REG    \
        !           806:       && GET_CODE (XEXP (X, 1)) != CONST_INT)                  \
        !           807:     (X) = gen_rtx (PLUS, SImode, XEXP (X, 0),                  \
        !           808:                   copy_to_mode_reg (SImode, XEXP (X, 1)));     \
        !           809:   if (GET_CODE (x) == SYMBOL_REF)                              \
        !           810:     (X) = copy_to_reg (X);                                     \
        !           811:   if (GET_CODE (x) == CONST)                                   \
        !           812:     (X) = copy_to_reg (X);                                     \
        !           813:   if (memory_address_p (MODE, X))                              \
        !           814:     goto WIN; }
        !           815: 
        !           816: /* Go to LABEL if ADDR (a legitimate address expression)
        !           817:    has an effect that depends on the machine mode it is used for.
        !           818:    On the i860 this is never true.
        !           819:    There are some addresses that are invalid in wide modes
        !           820:    but valid for narrower modes, but they shouldn't affect
        !           821:    the places that use this macro.  */
        !           822: 
        !           823: #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)
        !           824: 
        !           825: /* Specify the machine mode that this machine uses
        !           826:    for the index in the tablejump instruction.  */
        !           827: #define CASE_VECTOR_MODE SImode
        !           828: 
        !           829: /* Define this if the tablejump instruction expects the table
        !           830:    to contain offsets from the address of the table.
        !           831:    Do not define this if the table should contain absolute addresses.  */
        !           832: /* #define CASE_VECTOR_PC_RELATIVE */
        !           833: 
        !           834: /* Specify the tree operation to be used to convert reals to integers.  */
        !           835: #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
        !           836: 
        !           837: /* This is the kind of divide that is easiest to do in the general case.  */
        !           838: #define EASY_DIV_EXPR TRUNC_DIV_EXPR
        !           839: 
        !           840: /* Must pass floats to libgcc functions as doubles.  */
        !           841: #define LIBGCC_NEEDS_DOUBLE 1
        !           842: 
        !           843: #define DIVSI3_LIBCALL "*.div"
        !           844: #define UDIVSI3_LIBCALL "*.udiv"
        !           845: #define REMSI3_LIBCALL "*.rem"
        !           846: #define UREMSI3_LIBCALL "*.urem"
        !           847: 
        !           848: /* Define this as 1 if `char' should by default be signed; else as 0.  */
        !           849: #define DEFAULT_SIGNED_CHAR 1
        !           850: 
        !           851: /* Max number of bytes we can move from memory to memory
        !           852:    in one reasonably fast instruction.  */
        !           853: #define MOVE_MAX 16
        !           854: 
        !           855: /* Nonzero if access to memory by bytes is slow and undesirable.  */
        !           856: #define SLOW_BYTE_ACCESS 0
        !           857: 
        !           858: /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
        !           859:    is done just by pretending it is already truncated.  */
        !           860: #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
        !           861: 
        !           862: /* Value is 1 if it generates better code to perform an unsigned comparison
        !           863:    on the given literal integer value in the given mode when we are only
        !           864:    looking for an equal/non-equal result.  */
        !           865: /* For the i860, if the immediate value has its high-order 27 bits zero,
        !           866:    then we want to engineer an unsigned comparison for EQ/NE because
        !           867:    such values can fit in the 5-bit immediate field of a bte or btne
        !           868:    instruction (which gets zero extended before comparing).  For all
        !           869:    other immediate values on the i860, we will use signed compares
        !           870:    because that avoids the need for doing explicit xor's to zero_extend
        !           871:    the non-constant operand in cases where it was (mem:QI ...) or a
        !           872:    (mem:HI ...) which always gets automatically sign-extended by the
        !           873:    hardware upon loading.  */
        !           874: 
        !           875: #define LITERAL_COMPARE_BETTER_UNSIGNED(intval, mode)                   \
        !           876:   (((unsigned) (intval) & 0x1f) == (unsigned) (intval))
        !           877: 
        !           878: /* Specify the machine mode that pointers have.
        !           879:    After generation of rtl, the compiler makes no further distinction
        !           880:    between pointers and any other objects of this machine mode.  */
        !           881: #define Pmode SImode
        !           882: 
        !           883: /* A function address in a call instruction
        !           884:    is a byte address (for indexing purposes)
        !           885:    so give the MEM rtx a byte's mode.  */
        !           886: #define FUNCTION_MODE SImode
        !           887: 
        !           888: /* Define this if addresses of constant functions
        !           889:    shouldn't be put through pseudo regs where they can be cse'd.
        !           890:    Desirable on machines where ordinary constants are expensive
        !           891:    but a CALL with constant address is cheap.  */
        !           892: #define NO_FUNCTION_CSE
        !           893: 
        !           894: /* Compute the cost of computing a constant rtl expression RTX
        !           895:    whose rtx-code is CODE.  The body of this macro is a portion
        !           896:    of a switch statement.  If the code is computed here,
        !           897:    return it with a return statement.  Otherwise, break from the switch.  */
        !           898: 
        !           899: #define CONST_COSTS(RTX,CODE) \
        !           900:   case CONST_INT:                                              \
        !           901:     if (INTVAL (RTX) == 0)                                     \
        !           902:       return 0;                                                        \
        !           903:     if (INTVAL (RTX) < 0x2000 && INTVAL (RTX) >= -0x2000) return 1; \
        !           904:   case CONST:                                                  \
        !           905:   case LABEL_REF:                                              \
        !           906:   case SYMBOL_REF:                                             \
        !           907:     return 2;                                                  \
        !           908:   case CONST_DOUBLE:                                           \
        !           909:     return 4;
        !           910: 
        !           911: /* Specify the cost of a branch insn; roughly the number of extra insns that
        !           912:    should be added to avoid a branch.
        !           913: 
        !           914:    Set this to 3 on the i860 since branches may often take three cycles.  */
        !           915: 
        !           916: #define BRANCH_COST 3
        !           917: 
        !           918: /* Tell final.c how to eliminate redundant test instructions.  */
        !           919: 
        !           920: /* Here we define machine-dependent flags and fields in cc_status
        !           921:    (see `conditions.h').  */
        !           922: 
        !           923: /* This holds the value sourcing h%r31.  We keep this info
        !           924:    around so that mem/mem ops, such as increment and decrement,
        !           925:    etc, can be performed reasonably.  */
        !           926: #define CC_STATUS_MDEP rtx
        !           927: 
        !           928: #define CC_STATUS_MDEP_INIT (cc_status.mdep = 0)
        !           929: 
        !           930: #define CC_NEGATED     01000
        !           931: 
        !           932: /* We use this macro in those places in the i860.md file where we would
        !           933:    normally just do a CC_STATUS_INIT (for other machines).  This macro
        !           934:    differs from CC_STATUS_INIT in that it doesn't mess with the special
        !           935:    bits or fields which describe what is currently in the special r31
        !           936:    scratch register, but it does clear out everything that actually
        !           937:    relates to the condition code bit of the i860.  */
        !           938: 
        !           939: #define CC_STATUS_PARTIAL_INIT                                         \
        !           940:  (cc_status.flags &= (CC_KNOW_HI_R31 | CC_HI_R31_ADJ),                 \
        !           941:   cc_status.value1 = 0,                                                        \
        !           942:   cc_status.value2 = 0)
        !           943: 
        !           944: /* Nonzero if we know the value of h%r31.  */
        !           945: #define CC_KNOW_HI_R31 0100000
        !           946: 
        !           947: /* Nonzero if h%r31 is actually ha%something, rather than h%something.  */
        !           948: #define CC_HI_R31_ADJ 0200000
        !           949: 
        !           950: /* Store in cc_status the expressions
        !           951:    that the condition codes will describe
        !           952:    after execution of an instruction whose pattern is EXP.
        !           953:    Do not alter them if the instruction would not alter the cc's.  */
        !           954: 
        !           955: /* On the i860, only compare insns set a useful condition code.  */
        !           956: 
        !           957: #define NOTICE_UPDATE_CC(EXP, INSN) \
        !           958: { cc_status.flags &= (CC_KNOW_HI_R31 | CC_HI_R31_ADJ); \
        !           959:   cc_status.value1 = 0; cc_status.value2 = 0; }
        !           960: 
        !           961: /* Control the assembler format that we output.  */
        !           962: 
        !           963: /* Assembler pseudos to introduce constants of various size.  */
        !           964: 
        !           965: #define ASM_BYTE_OP "\t.byte"
        !           966: #define ASM_SHORT "\t.short"
        !           967: #define ASM_LONG "\t.long"
        !           968: #define ASM_DOUBLE "\t.double"
        !           969: 
        !           970: /* Output at beginning of assembler file.  */
        !           971: /* The .file command should always begin the output.  */
        !           972: 
        !           973: #define ASM_FILE_START(FILE)
        !           974: #if 0
        !           975: #define ASM_FILE_START(FILE)                                   \
        !           976:   do { output_file_directive ((FILE), main_input_filename);    \
        !           977:        if (optimize) ASM_FILE_START_1 (FILE);                  \
        !           978:      } while (0)
        !           979: #endif
        !           980: 
        !           981: #define ASM_FILE_START_1(FILE)
        !           982: 
        !           983: /* Output to assembler file text saying following lines
        !           984:    may contain character constants, extra white space, comments, etc.  */
        !           985: 
        !           986: #define ASM_APP_ON ""
        !           987: 
        !           988: /* Output to assembler file text saying following lines
        !           989:    no longer contain unusual constructs.  */
        !           990: 
        !           991: #define ASM_APP_OFF ""
        !           992: 
        !           993: /* Output before read-only data.  */
        !           994: 
        !           995: #define TEXT_SECTION_ASM_OP ".text"
        !           996: 
        !           997: /* Output before writable data.  */
        !           998: 
        !           999: #define DATA_SECTION_ASM_OP ".data"
        !          1000: 
        !          1001: /* How to refer to registers in assembler output.
        !          1002:    This sequence is indexed by compiler's hard-register-number (see above).  */
        !          1003: 
        !          1004: #define REGISTER_NAMES \
        !          1005: {"r0", "r1", "sp", "fp", "r4", "r5", "r6", "r7", "r8", "r9",           \
        !          1006:  "r10", "r11", "r12", "r13", "r14", "r15", "r16", "r17", "r18", "r19", \
        !          1007:  "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27", "r28", "r29", \
        !          1008:  "r30", "r31",                                                         \
        !          1009:  "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", "f8", "f9",           \
        !          1010:  "f10", "f11", "f12", "f13", "f14", "f15", "f16", "f17", "f18", "f19", \
        !          1011:  "f20", "f21", "f22", "f23", "f24", "f25", "f26", "f27", "f28", "f29", \
        !          1012:  "f30", "f31" }
        !          1013: 
        !          1014: /* How to renumber registers for dbx and gdb.  */
        !          1015: 
        !          1016: #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
        !          1017: 
        !          1018: /* This is how to output the definition of a user-level label named NAME,
        !          1019:    such as the label on a static function or variable NAME.  */
        !          1020: 
        !          1021: #define ASM_OUTPUT_LABEL(FILE,NAME)    \
        !          1022:   do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
        !          1023: 
        !          1024: /* This is how to output a command to make the user-level label named NAME
        !          1025:    defined for reference from other files.  */
        !          1026: 
        !          1027: #define ASM_GLOBALIZE_LABEL(FILE,NAME)                                 \
        !          1028:   do { fputs (".globl ", FILE);                                        \
        !          1029:        assemble_name (FILE, NAME);                                     \
        !          1030:        fputs ("\n", FILE);                                             \
        !          1031:   } while (0)
        !          1032: 
        !          1033: /* This is how to output a reference to a user-level label named NAME.
        !          1034:    `assemble_name' uses this.
        !          1035: 
        !          1036:    This definition is overridden in i860v4.h because under System V
        !          1037:    Release 4, user-level symbols are *not* prefixed with underscores in
        !          1038:    the generated assembly code.  */
        !          1039: 
        !          1040: #define ASM_OUTPUT_LABELREF(FILE,NAME) \
        !          1041:   fprintf (FILE, "_%s", NAME)
        !          1042: 
        !          1043: /* This is how to output an internal numbered label where
        !          1044:    PREFIX is the class of label and NUM is the number within the class.  */
        !          1045: 
        !          1046: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)     \
        !          1047:   fprintf (FILE, ".%s%d:\n", PREFIX, NUM)
        !          1048: 
        !          1049: /* This is how to output an internal numbered label which
        !          1050:    labels a jump table.  */
        !          1051: 
        !          1052: #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,JUMPTABLE)       \
        !          1053:   fprintf (FILE, "\t.align\t4\n.%s%d:\n", PREFIX, NUM)
        !          1054: 
        !          1055: /* Output at the end of a jump table.  */
        !          1056: 
        !          1057: #define ASM_OUTPUT_CASE_END(FILE,NUM,INSN)     \
        !          1058:   fprintf (FILE, ".text\n")
        !          1059: 
        !          1060: /* This is how to store into the string LABEL
        !          1061:    the symbol_ref name of an internal numbered label where
        !          1062:    PREFIX is the class of label and NUM is the number within the class.
        !          1063:    This is suitable for output with `assemble_name'.  */
        !          1064: 
        !          1065: #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)  \
        !          1066:   sprintf (LABEL, "*.%s%d", PREFIX, NUM)
        !          1067: 
        !          1068: /* This is how to output an assembler line defining a `double' constant.  */
        !          1069: 
        !          1070: #define ASM_OUTPUT_DOUBLE(FILE,VALUE)  \
        !          1071:   fprintf (FILE, "\t.double %.20e\n", (VALUE))
        !          1072: 
        !          1073: /* This is how to output an assembler line defining a `float' constant.  */
        !          1074: 
        !          1075: #define ASM_OUTPUT_FLOAT(FILE,VALUE)  \
        !          1076:   fprintf (FILE, "\t.float %.12e\n", (VALUE))
        !          1077: 
        !          1078: /* This is how to output an assembler line defining an `int' constant.  */
        !          1079: 
        !          1080: #define ASM_OUTPUT_INT(FILE,VALUE)  \
        !          1081: ( fprintf (FILE, "\t.long "),                  \
        !          1082:   output_addr_const (FILE, (VALUE)),           \
        !          1083:   fprintf (FILE, "\n"))
        !          1084: 
        !          1085: /* Likewise for `char' and `short' constants.  */
        !          1086: 
        !          1087: #define ASM_OUTPUT_SHORT(FILE,VALUE)  \
        !          1088: ( fprintf (FILE, "\t.short "),                 \
        !          1089:   output_addr_const (FILE, (VALUE)),           \
        !          1090:   fprintf (FILE, "\n"))
        !          1091: 
        !          1092: #define ASM_OUTPUT_CHAR(FILE,VALUE)  \
        !          1093: ( fprintf (FILE, "\t.byte "),                  \
        !          1094:   output_addr_const (FILE, (VALUE)),           \
        !          1095:   fprintf (FILE, "\n"))
        !          1096: 
        !          1097: /* This is how to output an assembler line for a numeric constant byte.  */
        !          1098: 
        !          1099: #define ASM_OUTPUT_BYTE(FILE,VALUE)  \
        !          1100:   fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
        !          1101: 
        !          1102: /* This is how to output code to push a register on the stack.
        !          1103:    It need not be very fast code.  */
        !          1104: 
        !          1105: #define ASM_OUTPUT_REG_PUSH(FILE,REGNO)                                        \
        !          1106:   fprintf (FILE, "\taddu -16,%ssp,%ssp\n\t%sst.l %s%s,0(%ssp)\n",      \
        !          1107:        i860_reg_prefix, i860_reg_prefix,                               \
        !          1108:        ((REGNO) < 32 ? "" : "f"),                                      \
        !          1109:        i860_reg_prefix, reg_names[REGNO],                              \
        !          1110:        i860_reg_prefix)
        !          1111: 
        !          1112: /* This is how to output an insn to pop a register from the stack.
        !          1113:    It need not be very fast code.  */
        !          1114: 
        !          1115: #define ASM_OUTPUT_REG_POP(FILE,REGNO)                                 \
        !          1116:   fprintf (FILE, "\t%sld.l 0(%ssp),%s%s\n\taddu 16,%ssp,%ssp\n",       \
        !          1117:        ((REGNO) < 32 ? "" : "f"),                                      \
        !          1118:        i860_reg_prefix,                                                \
        !          1119:        i860_reg_prefix, reg_names[REGNO],                              \
        !          1120:        i860_reg_prefix, i860_reg_prefix)
        !          1121: 
        !          1122: /* This is how to output an element of a case-vector that is absolute.  */
        !          1123: 
        !          1124: #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
        !          1125:   fprintf (FILE, "\t.long .L%d\n", VALUE)
        !          1126: 
        !          1127: /* This is how to output an element of a case-vector that is relative.
        !          1128:    (The i860 does not use such vectors,
        !          1129:    but we must define this macro anyway.)  */
        !          1130: 
        !          1131: #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL)  \
        !          1132:   fprintf (FILE, "\t.word .L%d-.L%d\n", VALUE, REL)
        !          1133: 
        !          1134: /* This is how to output an assembler line
        !          1135:    that says to advance the location counter
        !          1136:    to a multiple of 2**LOG bytes.  */
        !          1137: 
        !          1138: #define ASM_OUTPUT_ALIGN(FILE,LOG)     \
        !          1139:   if ((LOG) != 0)                      \
        !          1140:     fprintf (FILE, "\t.align %d\n", 1 << (LOG))
        !          1141: 
        !          1142: #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
        !          1143:   fprintf (FILE, "\t.blkb %u\n", (SIZE))
        !          1144: 
        !          1145: /* This says how to output an assembler line
        !          1146:    to define a global common symbol.  */
        !          1147: 
        !          1148: #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
        !          1149: ( fputs (".comm ", (FILE)),                    \
        !          1150:   assemble_name ((FILE), (NAME)),              \
        !          1151:   fprintf ((FILE), ",%u\n", (ROUNDED)))
        !          1152: 
        !          1153: /* This says how to output an assembler line
        !          1154:    to define a local common symbol.  */
        !          1155: 
        !          1156: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
        !          1157: ( fputs (".lcomm ", (FILE)),                   \
        !          1158:   assemble_name ((FILE), (NAME)),              \
        !          1159:   fprintf ((FILE), ",%u\n", (ROUNDED)))
        !          1160: 
        !          1161: /* Store in OUTPUT a string (made with alloca) containing
        !          1162:    an assembler-name for a local static variable named NAME.
        !          1163:    LABELNO is an integer which is different for each call.  */
        !          1164: 
        !          1165: #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
        !          1166: ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10),   \
        !          1167:   sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
        !          1168: 
        !          1169: /* Define the parentheses used to group arithmetic operations
        !          1170:    in assembler code.  */
        !          1171: 
        !          1172: #define ASM_OPEN_PAREN "("
        !          1173: #define ASM_CLOSE_PAREN ")"
        !          1174: 
        !          1175: /* Define results of standard character escape sequences.  */
        !          1176: #define TARGET_BELL 007
        !          1177: #define TARGET_BS 010
        !          1178: #define TARGET_TAB 011
        !          1179: #define TARGET_NEWLINE 012
        !          1180: #define TARGET_VT 013
        !          1181: #define TARGET_FF 014
        !          1182: #define TARGET_CR 015
        !          1183: 
        !          1184: /* Print operand X (an rtx) in assembler syntax to file FILE.
        !          1185:    CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
        !          1186:    For `%' followed by punctuation, CODE is the punctuation and X is null.
        !          1187: 
        !          1188:    In the following comments, the term "constant address" is used frequently.
        !          1189:    For an exact definition of what constitutes a "constant address" see the
        !          1190:    output_addr_const routine in final.c
        !          1191: 
        !          1192:    On the i860, the following target-specific special codes are recognized:
        !          1193: 
        !          1194:        `r'     The operand can be anything, but if is is an immediate zero
        !          1195:                value (either integer or floating point) then it will be
        !          1196:                represented as `r0' or as `f0' (respectively).
        !          1197: 
        !          1198:        `m'     The operand is a memory ref (to a constant address) but print
        !          1199:                its address as a constant.
        !          1200: 
        !          1201:        `L'     The operand is a numeric constant, a constant address, or
        !          1202:                a memory ref to a constant address.  Print the correct
        !          1203:                notation to yield the low part of the given value or
        !          1204:                address or the low part of the address of the referred
        !          1205:                to memory object.
        !          1206: 
        !          1207:        `H'     The operand is a numeric constant, a constant address, or
        !          1208:                a memory ref to a constant address.  Print the correct
        !          1209:                notation to yield the high part of the given value or
        !          1210:                address or the high part of the address of the refered
        !          1211:                to memory object.
        !          1212: 
        !          1213:        `h'     The operand is a numeric constant, a constant address, or
        !          1214:                a memory ref to a constant address.  Either print the
        !          1215:                correct notation to yield the plain high part of the
        !          1216:                given value or address (or the plain high part of the
        !          1217:                address of the memory object) or else print the correct
        !          1218:                notation to yield the "adjusted" high part of the given
        !          1219:                address (or of the address of the referred to memory object).
        !          1220: 
        !          1221:                The choice of what to print depends upon whether the address
        !          1222:                in question is relocatable or not.  If it is relocatable,
        !          1223:                print the notation to get the adjusted high part.  Otherwise
        !          1224:                just print the notation to get the plain high part.  Note
        !          1225:                that "adjusted" high parts are generally used *only* when
        !          1226:                the next following instruction uses the low part of the
        !          1227:                address as an offset, as in `offset(reg)'.
        !          1228: 
        !          1229:        `R'     The operand is a floating-pointer register.  Print the
        !          1230:                name of the next following (32-bit) floating-point register.
        !          1231:                (This is used when moving a value into just the most
        !          1232:                significant part of a floating-point register pair.)
        !          1233: 
        !          1234:        `?'     (takes no operand) Substitute the value of i860_reg_prefix
        !          1235:                at this point.  The value of i860_reg_prefix is typically
        !          1236:                a null string for most i860 targets, but for System V
        !          1237:                Release 4 the i860 assembler syntax requires that all
        !          1238:                names of registers be prefixed with a percent-sign, so
        !          1239:                for SVR4, the value of i860_reg_prefix is initialized to
        !          1240:                "%" in i860.c.
        !          1241: */
        !          1242: 
        !          1243: extern char *i860_reg_prefix;
        !          1244: extern unsigned long sfmode_constant_to_ulong ();
        !          1245: 
        !          1246: #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '?')
        !          1247: 
        !          1248: /* The following macro definition is overridden in i860v4.h
        !          1249:    because the svr4 i860 assembler required a different syntax
        !          1250:    for getting parts of constant/relocatable values.  */
        !          1251: 
        !          1252: #define PRINT_OPERAND_PART(FILE, X, PART_CODE)                         \
        !          1253:   do { fprintf (FILE, "%s%%", PART_CODE);                              \
        !          1254:        output_address (X);                                             \
        !          1255:   } while (0)
        !          1256: 
        !          1257: #define OPERAND_LOW_PART       "l"
        !          1258: #define OPERAND_HIGH_PART      "h"
        !          1259: /* NOTE: All documentation available for the i860 sez that you must
        !          1260:    use "ha" to get the relocated high part of a relocatable, but
        !          1261:    reality sez different.  */
        !          1262: #define OPERAND_HIGH_ADJ_PART  "ha"
        !          1263: 
        !          1264: #define PRINT_OPERAND(FILE, X, CODE)                                   \
        !          1265: { if ((CODE) == '?')                                                   \
        !          1266:     fprintf (FILE, "%s", i860_reg_prefix);                             \
        !          1267:   else if (CODE == 'R')                                                        \
        !          1268:     fprintf (FILE, "%s%s", i860_reg_prefix, reg_names[REGNO (X) + 1]); \
        !          1269:   else if (GET_CODE (X) == REG)                                                \
        !          1270:     fprintf (FILE, "%s%s", i860_reg_prefix, reg_names[REGNO (X)]);     \
        !          1271:   else if ((CODE) == 'm')                                              \
        !          1272:     output_address (XEXP (X, 0));                                      \
        !          1273:   else if ((CODE) == 'L')                                              \
        !          1274:     if (GET_CODE (X) == MEM)                                           \
        !          1275:       PRINT_OPERAND_PART (FILE, XEXP (X, 0), OPERAND_LOW_PART);                \
        !          1276:     else                                                               \
        !          1277:       PRINT_OPERAND_PART (FILE, X, OPERAND_LOW_PART);                  \
        !          1278:   else if ((CODE) == 'H')                                              \
        !          1279:     if (GET_CODE (X) == MEM)                                           \
        !          1280:       PRINT_OPERAND_PART (FILE, XEXP (X, 0), OPERAND_HIGH_PART);       \
        !          1281:     else                                                               \
        !          1282:       PRINT_OPERAND_PART (FILE, X, OPERAND_HIGH_PART);                 \
        !          1283:   else if ((CODE) == 'h')                                              \
        !          1284:     if (GET_CODE (X) == MEM)                                           \
        !          1285:       PRINT_OPERAND_PART (FILE, XEXP (X, 0),                           \
        !          1286:                const_int_operand (XEXP (X, 0))                         \
        !          1287:                        ? OPERAND_HIGH_PART                             \
        !          1288:                        : OPERAND_HIGH_ADJ_PART);                       \
        !          1289:     else                                                               \
        !          1290:       PRINT_OPERAND_PART (FILE, X,                                     \
        !          1291:                const_int_operand (X)                                   \
        !          1292:                        ? OPERAND_HIGH_PART                             \
        !          1293:                        : OPERAND_HIGH_ADJ_PART);                       \
        !          1294:   else if (GET_CODE (X) == MEM)                                                \
        !          1295:     output_address (XEXP (X, 0));                                      \
        !          1296:   else if ((CODE) == 'r' && (X) == const0_rtx)                         \
        !          1297:     fprintf (FILE, "%sr0", i860_reg_prefix);                           \
        !          1298:   else if ((CODE) == 'r' && (X) == CONST0_RTX (GET_MODE (X)))          \
        !          1299:     fprintf (FILE, "%sf0", i860_reg_prefix);                           \
        !          1300:   else if (GET_CODE (X) == CONST_DOUBLE)                               \
        !          1301:     fprintf (FILE, "0x%x", sfmode_constant_to_ulong (X));              \
        !          1302:   else                                                                 \
        !          1303:     output_addr_const (FILE, X); }
        !          1304: 
        !          1305: /* Print a memory address as an operand to reference that memory location.  */
        !          1306: 
        !          1307: #define PRINT_OPERAND_ADDRESS(FILE, ADDR)  \
        !          1308: { register rtx base, index = 0;                                        \
        !          1309:   int offset = 0;                                              \
        !          1310:   register rtx addr = ADDR;                                    \
        !          1311:   if (GET_CODE (addr) == REG)                                  \
        !          1312:     {                                                          \
        !          1313:       fprintf (FILE, "0(%s%s)",                                        \
        !          1314:        i860_reg_prefix, reg_names[REGNO (addr)]);              \
        !          1315:     }                                                          \
        !          1316:   else if (GET_CODE (addr) == CONST_DOUBLE                     \
        !          1317:             && GET_MODE (addr) == SFmode)                      \
        !          1318:     fprintf (FILE, "0x%x", sfmode_constant_to_ulong (addr));   \
        !          1319:   else if (GET_CODE (addr) == PLUS)                            \
        !          1320:     {                                                          \
        !          1321:       if ((GET_CODE (XEXP (addr, 0)) == CONST_INT)             \
        !          1322:          && (GET_CODE (XEXP (addr, 1)) == REG))                \
        !          1323:        fprintf (FILE, "%d(%s%s)", INTVAL (XEXP (addr, 0)),     \
        !          1324:            i860_reg_prefix, reg_names[REGNO (XEXP (addr, 1))]);\
        !          1325:       else if ((GET_CODE (XEXP (addr, 1)) == CONST_INT)                \
        !          1326:          && (GET_CODE (XEXP (addr, 0)) == REG))                \
        !          1327:        fprintf (FILE, "%d(%s%s)", INTVAL (XEXP (addr, 1)),     \
        !          1328:            i860_reg_prefix, reg_names[REGNO (XEXP (addr, 0))]);\
        !          1329:       else if ((GET_CODE (XEXP (addr, 0)) == REG)              \
        !          1330:          && (GET_CODE (XEXP (addr, 1)) == REG))                \
        !          1331:        fprintf (FILE, "%s%s(%s%s)",                            \
        !          1332:            i860_reg_prefix, reg_names[REGNO (XEXP (addr, 0))], \
        !          1333:            i860_reg_prefix, reg_names[REGNO (XEXP (addr, 1))]);\
        !          1334:       else                                                     \
        !          1335:        output_addr_const (FILE, addr);                         \
        !          1336:     }                                                          \
        !          1337:   else                                                         \
        !          1338:     {                                                          \
        !          1339:       output_addr_const (FILE, addr);                          \
        !          1340:     }                                                          \
        !          1341: }
        !          1342: 
        !          1343: /* The following #defines are used when compiling the routines in
        !          1344:    libgcc1.c.  Since the i860 calling conventions require single
        !          1345:    precision floats to be passed in the floating-point registers
        !          1346:    (rather than in the general registers) we have to build the
        !          1347:    libgcc1.c routines in such a way that they know the actual types
        !          1348:    of their formal arguments and the actual types of their return
        !          1349:    values.  Otherwise, gcc will generate calls to the libgcc1.c
        !          1350:    routines, passing argumenst in in the floating-point registers,
        !          1351:    but the libgcc1.c routines will expect their arguments on the
        !          1352:    stack (where the i860 calling conventions require structs &
        !          1353:    unions to be passed).  */
        !          1354: 
        !          1355: #define FLOAT_TYPE_VALUE       float
        !          1356: #define INTIFY(FLOATVAL)       (FLOATVAL)
        !          1357: #define FLOATIFY(INTVAL)       (INTVAL)
        !          1358: #define FLOAT_ARG_TYPE         float
        !          1359: 
        !          1360: 
        !          1361: /* Optionally define this if you have added predicates to
        !          1362:    `MACHINE.c'.  This macro is called within an initializer of an
        !          1363:    array of structures.  The first field in the structure is the
        !          1364:    name of a predicate and the second field is an arrary of rtl
        !          1365:    codes.  For each predicate, list all rtl codes that can be in
        !          1366:    expressions matched by the predicate.  The list should have a
        !          1367:    trailing comma.  Here is an example of two entries in the list
        !          1368:    for a typical RISC machine:
        !          1369: 
        !          1370:    #define PREDICATE_CODES \
        !          1371:      {"gen_reg_rtx_operand", {SUBREG, REG}},  \
        !          1372:      {"reg_or_short_cint_operand", {SUBREG, REG, CONST_INT}},
        !          1373: 
        !          1374:    Defining this macro does not affect the generated code (however,
        !          1375:    incorrect definitions that omit an rtl code that may be matched
        !          1376:    by the predicate can cause the compiler to malfunction). 
        !          1377:    Instead, it allows the table built by `genrecog' to be more
        !          1378:    compact and efficient, thus speeding up the compiler.  The most
        !          1379:    important predicates to include in the list specified by this
        !          1380:    macro are thoses used in the most insn patterns.
        !          1381: 
        !          1382:    Note that for the i860 we have one more predicate, i.e.
        !          1383:    `single_insn_src_operand', however this is used only
        !          1384:    infrequently, so we don't put in the PREDICATE_CODES list.
        !          1385: */
        !          1386: 
        !          1387: #define PREDICATE_CODES                                                        \
        !          1388:    {"reg_or_0_operand",                {REG, SUBREG, CONST_INT}},              \
        !          1389:    {"arith_operand",           {REG, SUBREG, CONST_INT}},              \
        !          1390:    {"logic_operand",           {REG, SUBREG, CONST_INT}},              \
        !          1391:    {"shift_operand",           {REG, SUBREG, CONST_INT}},              \
        !          1392:    {"compare_operand",         {REG, SUBREG, CONST_INT}},              \
        !          1393:    {"arith_const_operand",     {CONST_INT}},                           \
        !          1394:    {"logic_const_operand",     {CONST_INT}},                           \
        !          1395:    {"bte_operand",             {REG, SUBREG, CONST_INT}},              \
        !          1396:    {"indexed_operand",         {MEM}},                                 \
        !          1397:    {"load_operand",            {MEM}},
        !          1398: 
        !          1399: /* Define the information needed to generate branch insns.  This is stored
        !          1400:    from the compare operation.  Note that we can't use "rtx" here since it
        !          1401:    hasn't been defined!  */
        !          1402: 
        !          1403: extern struct rtx_def *i860_compare_op0, *i860_compare_op1;
        !          1404: 
        !          1405: /* Declare things which are defined in i860.c but called from
        !          1406:    insn-output.c.  */
        !          1407: 
        !          1408: extern unsigned long sfmode_constant_to_ulong ();
        !          1409: extern char *output_load ();
        !          1410: extern char *output_store ();
        !          1411: extern char *output_move_double ();
        !          1412: extern char *output_fp_move_double ();
        !          1413: extern char *output_block_move ();
        !          1414: extern char *output_delay_insn ();
        !          1415: extern char *output_delayed_branch ();
        !          1416: extern void output_load_address ();

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