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Annotation of GNUtools/cc/config/fx80/fx80.h, revision 1.1

1.1     ! root        1: /* Definitions of target machine for GNU compiler.  Alliant FX version.
        !             2:    Copyright (C) 1989 Free Software Foundation, Inc.
        !             3:    Adapted from m68k.h by Paul Petersen ([email protected])
        !             4:    and Joe Weening ([email protected]).
        !             5: 
        !             6: This file is part of GNU CC.
        !             7: 
        !             8: GNU CC is free software; you can redistribute it and/or modify
        !             9: it under the terms of the GNU General Public License as published by
        !            10: the Free Software Foundation; either version 2, or (at your option)
        !            11: any later version.
        !            12: 
        !            13: GNU CC is distributed in the hope that it will be useful,
        !            14: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            15: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            16: GNU General Public License for more details.
        !            17: 
        !            18: You should have received a copy of the GNU General Public License
        !            19: along with GNU CC; see the file COPYING.  If not, write to
        !            20: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            21: 
        !            22: 
        !            23: /* This file is based on m68k.h, simplified by removing support for
        !            24:    the Sun FPA and other things not applicable to the Alliant.  Some
        !            25:    remnants of these features remain.  */
        !            26: 
        !            27: /* Names to predefine in the preprocessor for this target machine.  */
        !            28: 
        !            29: #define CPP_PREDEFINES "-Dmc68000 -Dalliant -Dunix -Asystem(unix) -Acpu(m68k) -Amachine(m68k)"
        !            30: 
        !            31: /* Print subsidiary information on the compiler version in use.  */
        !            32: 
        !            33: #define TARGET_VERSION fprintf (stderr, " (Alliant)");
        !            34: 
        !            35: /* Run-time compilation parameters selecting different hardware
        !            36:    subsets.  The Alliant IP is an mc68020.  (Older mc68010-based IPs
        !            37:    are no longer supported.)  The Alliant CE is 68020-compatible, and
        !            38:    also has floating point, vector and concurrency instructions.
        !            39: 
        !            40:    Although the IP doesn't have floating point, it emulates it in the
        !            41:    operating system.  Using this generally is faster than running code
        !            42:    compiled with -msoft-float, because the soft-float code still uses
        !            43:    (simulated) FP registers and ends up emulating several fmove{s,d}
        !            44:    instructions per call.  So I don't recommend using soft-float for
        !            45:    any Alliant code.  -- JSW
        !            46: */
        !            47: 
        !            48: extern int target_flags;
        !            49: 
        !            50: /* Macros used in the machine description to test the flags.  */
        !            51: 
        !            52: /* Compile for a 68020 (not a 68000 or 68010).  */
        !            53: #define TARGET_68020 (target_flags & 1)
        !            54: /* Compile CE insns for floating point (not library calls).  */
        !            55: #define TARGET_CE (target_flags & 2)
        !            56: /* Compile using 68020 bitfield insns.  */
        !            57: #define TARGET_BITFIELD (target_flags & 4)
        !            58: /* Compile with 16-bit `int'.  */
        !            59: #define TARGET_SHORT (target_flags & 040)
        !            60: 
        !            61: /* Default 3 means compile 68020 and CE instructions.  We don't use
        !            62:    bitfield instructions because there appears to be a bug in the
        !            63:    implementation of bfins on the CE.  */
        !            64: 
        !            65: #define TARGET_DEFAULT 3
        !            66: 
        !            67: /* Define __HAVE_CE__ in preprocessor according to the -m flags.
        !            68:    This will control the use of inline FP insns in certain macros.
        !            69:    Also inform the program which CPU this is for.  */
        !            70: 
        !            71: #if TARGET_DEFAULT & 02
        !            72: 
        !            73: /* -mce is the default */
        !            74: #define CPP_SPEC \
        !            75: "%{!msoft-float:-D__HAVE_CE__ }\
        !            76: %{m68000:-Dmc68010}%{mc68000:-Dmc68010}%{!mc68000:%{!m68000:-Dmc68020}}"
        !            77: 
        !            78: #else
        !            79: 
        !            80: /* -msoft-float is the default */
        !            81: #define CPP_SPEC \
        !            82: "%{mce:-D__HAVE_CE__ }\
        !            83: %{m68000:-Dmc68010}%{mc68000:-Dmc68010}%{!mc68000:%{!m68000:-Dmc68020}}"
        !            84: 
        !            85: #endif
        !            86: 
        !            87: /* Link with libg.a when debugging, for dbx's sake.  */
        !            88: 
        !            89: #define LIB_SPEC "%{g:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} "
        !            90: 
        !            91: /* Make the linker remove temporary labels, since the Alliant assembler
        !            92:    doesn't.  */
        !            93: 
        !            94: #define LINK_SPEC "-X"
        !            95: 
        !            96: /* Every structure or union's size must be a multiple of 2 bytes.  */
        !            97: 
        !            98: #define STRUCTURE_SIZE_BOUNDARY 16
        !            99: 
        !           100: /* This is BSD, so it wants DBX format.  */
        !           101: 
        !           102: #define DBX_DEBUGGING_INFO
        !           103: 
        !           104: /* Macro to define tables used to set the flags.
        !           105:    This is a list in braces of pairs in braces,
        !           106:    each pair being { "NAME", VALUE }
        !           107:    where VALUE is the bits to set or minus the bits to clear.
        !           108:    An empty string NAME is used to identify the default VALUE.  */
        !           109: 
        !           110: #define TARGET_SWITCHES  \
        !           111:   { { "68020", 5},                             \
        !           112:     { "c68020", 5},                            \
        !           113:     { "bitfield", 4},                          \
        !           114:     { "68000", -7},                            \
        !           115:     { "c68000", -7},                           \
        !           116:     { "soft-float", -2},                       \
        !           117:     { "nobitfield", -4},                       \
        !           118:     { "short", 040},                           \
        !           119:     { "noshort", -040},                                \
        !           120:     { "", TARGET_DEFAULT}}
        !           121: 
        !           122: /* target machine storage layout */
        !           123: 
        !           124: /* Define this if most significant bit is lowest numbered
        !           125:    in instructions that operate on numbered bit-fields.
        !           126:    This is true for 68020 insns such as bfins and bfexts.
        !           127:    We make it true always by avoiding using the single-bit insns
        !           128:    except in special cases with constant bit numbers.  */
        !           129: #define BITS_BIG_ENDIAN 1
        !           130: 
        !           131: /* Define this if most significant byte of a word is the lowest numbered.  */
        !           132: /* That is true on the 68000.  */
        !           133: #define BYTES_BIG_ENDIAN 1
        !           134: 
        !           135: /* Define this if most significant word of a multiword number is the lowest
        !           136:    numbered.  */
        !           137: /* For 68000 we can decide arbitrarily
        !           138:    since there are no machine instructions for them.  */
        !           139: #define WORDS_BIG_ENDIAN 0
        !           140: 
        !           141: /* number of bits in an addressable storage unit */
        !           142: #define BITS_PER_UNIT 8
        !           143: 
        !           144: /* Width in bits of a "word", which is the contents of a machine register.
        !           145:    Note that this is not necessarily the width of data type `int';
        !           146:    if using 16-bit ints on a 68000, this would still be 32.
        !           147:    But on a machine with 16-bit registers, this would be 16.  */
        !           148: #define BITS_PER_WORD 32
        !           149: 
        !           150: /* Width of a word, in units (bytes).  */
        !           151: #define UNITS_PER_WORD 4
        !           152: 
        !           153: /* Width in bits of a pointer.
        !           154:    See also the macro `Pmode' defined below.  */
        !           155: #define POINTER_SIZE 32
        !           156: 
        !           157: /* Allocation boundary (in *bits*) for storing arguments in argument list.  */
        !           158: #define PARM_BOUNDARY (TARGET_SHORT ? 16 : 32)
        !           159: 
        !           160: /* Boundary (in *bits*) on which stack pointer should be aligned.  */
        !           161: #define STACK_BOUNDARY 16
        !           162: 
        !           163: /* Allocation boundary (in *bits*) for the code of a function.  */
        !           164: #define FUNCTION_BOUNDARY 16
        !           165: 
        !           166: /* Alignment of field after `int : 0' in a structure.  */
        !           167: #define EMPTY_FIELD_BOUNDARY 16
        !           168: 
        !           169: /* No data type wants to be aligned rounder than this.  */
        !           170: #define BIGGEST_ALIGNMENT 16
        !           171: 
        !           172: /* Set this non-zero if move instructions will actually fail to work
        !           173:    when given unaligned data.  */
        !           174: #define STRICT_ALIGNMENT 1
        !           175: 
        !           176: /* Define number of bits in most basic integer type.
        !           177:    (If undefined, default is BITS_PER_WORD).  */
        !           178: 
        !           179: #define INT_TYPE_SIZE (TARGET_SHORT ? 16 : 32)
        !           180: 
        !           181: /* Define these to avoid dependence on meaning of `int'.
        !           182:    Note that WCHAR_TYPE_SIZE is used in cexp.y,
        !           183:    where TARGET_SHORT is not available.  */
        !           184: 
        !           185: #define WCHAR_TYPE "long int"
        !           186: #define WCHAR_TYPE_SIZE 32
        !           187: 
        !           188: /* Standard register usage.  */
        !           189: 
        !           190: /* Number of actual hardware registers.
        !           191:    The hardware registers are assigned numbers for the compiler
        !           192:    from 0 to just below FIRST_PSEUDO_REGISTER.
        !           193:    All registers that the compiler knows about must be given numbers,
        !           194:    even those that are not normally considered general registers.
        !           195:    For the Alliant, we give the data registers numbers 0-7,
        !           196:    the address registers numbers 010-017,
        !           197:    and the floating point registers numbers 020-027.  */
        !           198: #define FIRST_PSEUDO_REGISTER 24
        !           199: 
        !           200: /* 1 for registers that have pervasive standard uses
        !           201:    and are not available for the register allocator.
        !           202:    On the Alliant, these are a0 (argument pointer),
        !           203:    a6 (frame pointer) and a7 (stack pointer).  */
        !           204: #define FIXED_REGISTERS  \
        !           205:  {0, 0, 0, 0, 0, 0, 0, 0, \
        !           206:   1, 0, 0, 0, 0, 0, 1, 1, \
        !           207:   0, 0, 0, 0, 0, 0, 0, 0  }
        !           208: 
        !           209: /* 1 for registers not available across function calls.
        !           210:    These must include the FIXED_REGISTERS and also any
        !           211:    registers that can be used without being saved.
        !           212:    The latter must include the registers where values are returned
        !           213:    and the register where structure-value addresses are passed.
        !           214:    Aside from that, you can include as many other registers as you like.
        !           215:    The Alliant calling sequence allows a function to use any register,
        !           216:    so we include them all here.  */
        !           217: 
        !           218: #define CALL_USED_REGISTERS \
        !           219:  {1, 1, 1, 1, 1, 1, 1, 1, \
        !           220:   1, 1, 1, 1, 1, 1, 1, 1, \
        !           221:   1, 1, 1, 1, 1, 1, 1, 1  }
        !           222: 
        !           223: /* Return number of consecutive hard regs needed starting at reg REGNO
        !           224:    to hold something of mode MODE.
        !           225:    This is ordinarily the length in words of a value of mode MODE
        !           226:    but can be less for certain modes in special long registers.
        !           227: 
        !           228:    On the Alliant, ordinary registers hold 32 bits worth;
        !           229:    for the FP registers, a single register is always enough for
        !           230:    any floating-point value.  */
        !           231: #define HARD_REGNO_NREGS(REGNO, MODE)   \
        !           232:   ((REGNO) >= 16 ? GET_MODE_NUNITS (MODE)      \
        !           233:    : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
        !           234: 
        !           235: /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
        !           236:    On the Alliant, the cpu registers can hold any mode but the FP registers
        !           237:    can hold only floating point.  */
        !           238: #define HARD_REGNO_MODE_OK(REGNO, MODE)                \
        !           239:   ((REGNO) < 16 || GET_MODE_CLASS (MODE) == MODE_FLOAT \
        !           240:    || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT)
        !           241: 
        !           242: /* Value is 1 if it is a good idea to tie two pseudo registers
        !           243:    when one has mode MODE1 and one has mode MODE2.
        !           244:    If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
        !           245:    for any hard reg, then this must be 0 for correct output.  */
        !           246: #define MODES_TIEABLE_P(MODE1, MODE2)                  \
        !           247:    (((MODE1) == SFmode || (MODE1) == DFmode            \
        !           248:      || (MODE1) == SCmode || (MODE1) == DCmode)                \
        !           249:        == ((MODE2) == SFmode || (MODE2) == DFmode      \
        !           250:           || (MODE2) == SCmode || (MODE2) == DCmode))
        !           251: 
        !           252: /* Specify the registers used for certain standard purposes.
        !           253:    The values of these macros are register numbers.  */
        !           254: 
        !           255: /* m68000 pc isn't overloaded on a register.  */
        !           256: /* #define PC_REGNUM  */
        !           257: 
        !           258: /* Register to use for pushing function arguments.  */
        !           259: #define STACK_POINTER_REGNUM 15
        !           260: 
        !           261: /* Base register for access to local variables of the function.  */
        !           262: #define FRAME_POINTER_REGNUM 14
        !           263: 
        !           264: /* Value should be nonzero if functions must have frame pointers.
        !           265:    Zero means the frame pointer need not be set up (and parms
        !           266:    may be accessed via the stack pointer) in functions that seem suitable.
        !           267:    This is computed in `reload', in reload1.c.  */
        !           268: /* Set for now on Alliant until we find a way to make this work with
        !           269:    their calling sequence.  */
        !           270: #define FRAME_POINTER_REQUIRED 1
        !           271: 
        !           272: /* Base register for access to arguments of the function.  */
        !           273: #define ARG_POINTER_REGNUM  8 
        !           274: 
        !           275: /* Register in which static-chain is passed to a function.  */
        !           276: #define STATIC_CHAIN_REGNUM 10
        !           277: 
        !           278: /* Register in which address to store a structure value
        !           279:    is passed to a function.  */
        !           280: #define STRUCT_VALUE_REGNUM 9
        !           281: 
        !           282: /* Define the classes of registers for register constraints in the
        !           283:    machine description.  Also define ranges of constants.
        !           284: 
        !           285:    One of the classes must always be named ALL_REGS and include all hard regs.
        !           286:    If there is more than one class, another class must be named NO_REGS
        !           287:    and contain no registers.
        !           288: 
        !           289:    The name GENERAL_REGS must be the name of a class (or an alias for
        !           290:    another name such as ALL_REGS).  This is the class of registers
        !           291:    that is allowed by "g" or "r" in a register constraint.
        !           292:    Also, registers outside this class are allocated only when
        !           293:    instructions express preferences for them.
        !           294: 
        !           295:    The classes must be numbered in nondecreasing order; that is,
        !           296:    a larger-numbered class must never be contained completely
        !           297:    in a smaller-numbered class.
        !           298: 
        !           299:    For any two classes, it is very desirable that there be another
        !           300:    class that represents their union.  */
        !           301: 
        !           302: /* The Alliant has three kinds of registers, so eight classes would be
        !           303:    a complete set.  One of them is not needed.  */
        !           304: 
        !           305: enum reg_class { NO_REGS, FP_REGS, DATA_REGS, DATA_OR_FP_REGS,
        !           306:   ADDR_REGS, GENERAL_REGS, ALL_REGS, LIM_REG_CLASSES };
        !           307: 
        !           308: #define N_REG_CLASSES (int) LIM_REG_CLASSES
        !           309: 
        !           310: /* Give names of register classes as strings for dump file.   */
        !           311: 
        !           312: #define REG_CLASS_NAMES \
        !           313:  { "NO_REGS", "FP_REGS", "DATA_REGS", "DATA_OR_FP_REGS",  \
        !           314:    "ADDR_REGS", "GENERAL_REGS", "ALL_REGS" }
        !           315: 
        !           316: /* Define which registers fit in which classes.
        !           317:    This is an initializer for a vector of HARD_REG_SET
        !           318:    of length N_REG_CLASSES.  */
        !           319: 
        !           320: #define REG_CLASS_CONTENTS \
        !           321: {                                      \
        !           322:  0,            /* NO_REGS */           \
        !           323:  0x00ff0000,   /* FP_REGS */           \
        !           324:  0x000000ff,   /* DATA_REGS */         \
        !           325:  0x00ff00ff,   /* DATA_OR_FP_REGS */   \
        !           326:  0x0000ff00,   /* ADDR_REGS */         \
        !           327:  0x0000ffff,   /* GENERAL_REGS */      \
        !           328:  0x00ffffff    /* ALL_REGS */          \
        !           329: }
        !           330: 
        !           331: /* The same information, inverted:
        !           332:    Return the class number of the smallest class containing
        !           333:    reg number REGNO.  This could be a conditional expression
        !           334:    or could index an array.  */
        !           335: 
        !           336: extern enum reg_class regno_reg_class[];
        !           337: #define REGNO_REG_CLASS(REGNO) (regno_reg_class[(REGNO)>>3])
        !           338: 
        !           339: /* The class value for index registers, and the one for base regs.  */
        !           340: 
        !           341: #define INDEX_REG_CLASS GENERAL_REGS
        !           342: #define BASE_REG_CLASS ADDR_REGS
        !           343: 
        !           344: /* Get reg_class from a letter such as appears in the machine description.  */
        !           345: 
        !           346: #define REG_CLASS_FROM_LETTER(C) \
        !           347:   ((C) == 'a' ? ADDR_REGS :                    \
        !           348:    ((C) == 'd' ? DATA_REGS :                   \
        !           349:     ((C) == 'f' ? FP_REGS :                    \
        !           350:      NO_REGS)))
        !           351: 
        !           352: /* The letters I, J, K, L and M in a register constraint string
        !           353:    can be used to stand for particular ranges of immediate operands.
        !           354:    This macro defines what the ranges are.
        !           355:    C is the letter, and VALUE is a constant value.
        !           356:    Return 1 if VALUE is in the range specified by C.
        !           357: 
        !           358:    For the 68000, `I' is used for the range 1 to 8
        !           359:    allowed as immediate shift counts and in addq.
        !           360:    `J' is used for the range of signed numbers that fit in 16 bits.
        !           361:    `K' is for numbers that moveq can't handle.
        !           362:    `L' is for range -8 to -1, range of values that can be added with subq.  */
        !           363: 
        !           364: #define CONST_OK_FOR_LETTER_P(VALUE, C)  \
        !           365:   ((C) == 'I' ? (VALUE) > 0 && (VALUE) <= 8 :    \
        !           366:    (C) == 'J' ? (VALUE) >= -0x8000 && (VALUE) <= 0x7FFF :      \
        !           367:    (C) == 'K' ? (VALUE) < -0x80 || (VALUE) >= 0x80 :   \
        !           368:    (C) == 'L' ? (VALUE) < 0 && (VALUE) >= -8 : 0)
        !           369: 
        !           370: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)  0
        !           371: 
        !           372: /* Given an rtx X being reloaded into a reg required to be
        !           373:    in class CLASS, return the class of reg to actually use.
        !           374:    In general this is just CLASS; but on some machines
        !           375:    in some cases it is preferable to use a more restrictive class.
        !           376:    On the 68000 series, use a data reg if possible when the
        !           377:    value is a constant in the range where moveq could be used
        !           378:    and we ensure that QImodes are reloaded into data regs.  */
        !           379: 
        !           380: #define PREFERRED_RELOAD_CLASS(X,CLASS)  \
        !           381:   ((GET_CODE (X) == CONST_INT                  \
        !           382:     && (unsigned) (INTVAL (X) + 0x80) < 0x100  \
        !           383:     && (CLASS) != ADDR_REGS)                   \
        !           384:    ? DATA_REGS                                 \
        !           385:    : GET_MODE (X) == QImode                    \
        !           386:    ? DATA_REGS                                 \
        !           387:    : (CLASS))
        !           388: 
        !           389: /* Return the maximum number of consecutive registers
        !           390:    needed to represent mode MODE in a register of class CLASS.  */
        !           391: /* On the 68000, this is the size of MODE in words,
        !           392:    except in the FP regs, where a single reg is always enough.  */
        !           393: #define CLASS_MAX_NREGS(CLASS, MODE)   \
        !           394:  ((CLASS) == FP_REGS ? 1 \
        !           395:   : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
        !           396: 
        !           397: /* Moves between fp regs and other regs are two insns.  */
        !           398: #define REGISTER_MOVE_COST(CLASS1, CLASS2)             \
        !           399:   ((((CLASS1) == FP_REGS && (CLASS2) != FP_REGS)       \
        !           400:     || ((CLASS2) == FP_REGS && (CLASS1) != FP_REGS))   \
        !           401:    ? 4 : 2)
        !           402: 
        !           403: /* Stack layout; function entry, exit and calling.  */
        !           404: 
        !           405: /* Define this if pushing a word on the stack
        !           406:    makes the stack pointer a smaller address.  */
        !           407: #define STACK_GROWS_DOWNWARD
        !           408: 
        !           409: /* Define this if the nominal address of the stack frame
        !           410:    is at the high-address end of the local variables;
        !           411:    that is, each additional local variable allocated
        !           412:    goes at a more negative offset in the frame.  */
        !           413: #define FRAME_GROWS_DOWNWARD
        !           414: 
        !           415: /* The Alliant uses -fcaller-saves by default.  */
        !           416: #define DEFAULT_CALLER_SAVES
        !           417: 
        !           418: /* Offset within stack frame to start allocating local variables at.
        !           419:    If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
        !           420:    first local allocated.  Otherwise, it is the offset to the BEGINNING
        !           421:    of the first local allocated.  */
        !           422: #define STARTING_FRAME_OFFSET -4
        !           423: 
        !           424: /* If we generate an insn to push BYTES bytes,
        !           425:    this says how many the stack pointer really advances by.
        !           426:    On the 68000, sp@- in a byte insn really pushes a word.  */
        !           427: #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1)
        !           428: 
        !           429: /* Offset of first parameter from the argument pointer register value.  */
        !           430: #define FIRST_PARM_OFFSET(FNDECL) 0
        !           431: 
        !           432: /* Value is the number of bytes of arguments automatically
        !           433:    popped when returning from a subroutine call.
        !           434:    FUNTYPE is the data type of the function (as a tree),
        !           435:    or for a library call it is an identifier node for the subroutine name.
        !           436:    SIZE is the number of bytes of arguments passed on the stack. 
        !           437: 
        !           438:    On the Alliant we define this as SIZE and make the calling sequence
        !           439:    (in alliant.md) pop the args.  This wouldn't be necessary if we
        !           440:    could add to the pending stack adjustment the size of the argument
        !           441:    descriptors that are pushed after the arguments.  */
        !           442: 
        !           443: #define RETURN_POPS_ARGS(FUNTYPE,SIZE) (SIZE)
        !           444: 
        !           445: /* Define how to find the value returned by a function.
        !           446:    VALTYPE is the data type of the value (as a tree).
        !           447:    If the precise function being called is known, FUNC is its FUNCTION_DECL;
        !           448:    otherwise, FUNC is 0.  */
        !           449: 
        !           450: /* On the Alliant the return value is in FP0 if real, else D0.  */
        !           451: 
        !           452: #define FUNCTION_VALUE(VALTYPE, FUNC)  \
        !           453:   (TREE_CODE (VALTYPE) == REAL_TYPE \
        !           454:    ? gen_rtx (REG, TYPE_MODE (VALTYPE), 16) \
        !           455:    : gen_rtx (REG, TYPE_MODE (VALTYPE), 0))
        !           456: 
        !           457: /* Define how to find the value returned by a library function
        !           458:    assuming the value has mode MODE.  */
        !           459: 
        !           460: /* On the Alliant the return value is in FP0 if real, else D0.  The
        !           461:    Alliant library functions for floating-point emulation return their
        !           462:    values both in FP0 and in D0/D1.  But since not all libgcc functions
        !           463:    return the results of these directly, we cannot assume that D0/D1
        !           464:    contain the values we expect on return from a libgcc function.  */
        !           465: 
        !           466: #define LIBCALL_VALUE(MODE)  \
        !           467:   (((MODE) == DFmode || (MODE) == SFmode) \
        !           468:    ? gen_rtx (REG, MODE, 16) \
        !           469:    : gen_rtx (REG, MODE, 0))
        !           470: 
        !           471: /* 1 if N is a possible register number for a function value.
        !           472:    On the Alliant, D0 and FP0 are the only registers thus used.
        !           473:    (No need to mention D1 when used as a pair with D0.)  */
        !           474: 
        !           475: #define FUNCTION_VALUE_REGNO_P(N) (((N) & ~16) == 0)
        !           476: 
        !           477: /* Define this if PCC uses the nonreentrant convention for returning
        !           478:    structure and union values.  */
        !           479: 
        !           480: #define PCC_STATIC_STRUCT_RETURN
        !           481: 
        !           482: /* 1 if N is a possible register number for function argument passing.
        !           483:    On the Alliant, no registers are used in this way.  */
        !           484: 
        !           485: #define FUNCTION_ARG_REGNO_P(N) 0
        !           486: 
        !           487: /* Define a data type for recording info about an argument list
        !           488:    during the scan of that argument list.  This data type should
        !           489:    hold all necessary information about the function itself
        !           490:    and about the args processed so far, enough to enable macros
        !           491:    such as FUNCTION_ARG to determine where the next arg should go.
        !           492: 
        !           493:    On the Alliant, this is a single integer, which is a number of bytes
        !           494:    of arguments scanned so far.  */
        !           495: 
        !           496: #define CUMULATIVE_ARGS int
        !           497: 
        !           498: /* Initialize a variable CUM of type CUMULATIVE_ARGS
        !           499:    for a call to a function whose data type is FNTYPE.
        !           500:    For a library call, FNTYPE is 0.
        !           501: 
        !           502:    On the Alliant, the offset starts at 0.  */
        !           503: 
        !           504: #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME)       \
        !           505:  ((CUM) = 0)
        !           506: 
        !           507: /* Update the data in CUM to advance over an argument
        !           508:    of mode MODE and data type TYPE.
        !           509:    (TYPE is null for libcalls where that information may not be available.)  */
        !           510: 
        !           511: #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)   \
        !           512:  ((CUM) += ((MODE) != BLKmode                  \
        !           513:            ? (GET_MODE_SIZE (MODE) + 3) & ~3   \
        !           514:            : (int_size_in_bytes (TYPE) + 3) & ~3))
        !           515: 
        !           516: /* Define where to put the arguments to a function.
        !           517:    Value is zero to push the argument on the stack,
        !           518:    or a hard register in which to store the argument.
        !           519: 
        !           520:    MODE is the argument's machine mode.
        !           521:    TYPE is the data type of the argument (as a tree).
        !           522:     This is null for libcalls where that information may
        !           523:     not be available.
        !           524:    CUM is a variable of type CUMULATIVE_ARGS which gives info about
        !           525:     the preceding args and about the function being called.
        !           526:    NAMED is nonzero if this argument is a named parameter
        !           527:     (otherwise it is an extra parameter matching an ellipsis).  */
        !           528: 
        !           529: /* On the Alliant all args are pushed.  */
        !           530: 
        !           531: #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) 0
        !           532: 
        !           533: /* For an arg passed partly in registers and partly in memory,
        !           534:    this is the number of registers used.
        !           535:    For args passed entirely in registers or entirely in memory, zero.  */
        !           536: 
        !           537: #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) 0
        !           538: 
        !           539: /* This macro generates the assembly code for function entry.
        !           540:    FILE is a stdio stream to output the code to.
        !           541:    SIZE is an int: how many units of temporary storage to allocate.
        !           542:    Refer to the array `regs_ever_live' to determine which registers
        !           543:    to save; `regs_ever_live[I]' is nonzero if register number I
        !           544:    is ever used in the function.  This macro is responsible for
        !           545:    knowing which registers should not be saved even if used.
        !           546:    The Alliant uses caller-saves, so this macro is very simple.  */
        !           547: 
        !           548: #define FUNCTION_PROLOGUE(FILE, SIZE)     \
        !           549: { int fsize = ((SIZE) - STARTING_FRAME_OFFSET + 3) & -4;       \
        !           550:   if (frame_pointer_needed)                                    \
        !           551:     {                                                          \
        !           552:       if (fsize < 0x8000)                                      \
        !           553:        fprintf(FILE,"\tlinkw a6,#%d\n", -fsize);               \
        !           554:       else if (TARGET_68020)                                   \
        !           555:        fprintf(FILE,"\tlinkl a6,#%d\n", -fsize);               \
        !           556:       else                                                     \
        !           557:        fprintf(FILE,"\tlinkw a6,#0\n\tsubl #%d,sp\n", fsize);  \
        !           558:       fprintf(FILE, "\tmovl a0,a6@(-4)\n" ); }}
        !           559: 
        !           560: /* Output assembler code to FILE to increment profiler label # LABELNO
        !           561:    for profiling a function entry.  */
        !           562: 
        !           563: #define FUNCTION_PROFILER(FILE, LABELNO)  \
        !           564:   fprintf (FILE, "\tjbsr __mcount_\n")
        !           565: 
        !           566: /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
        !           567:    the stack pointer does not matter.  The value is tested only in
        !           568:    functions that have frame pointers.
        !           569:    No definition is equivalent to always zero.  */
        !           570: 
        !           571: #define EXIT_IGNORE_STACK 1
        !           572: 
        !           573: /* This macro generates the assembly code for function exit,
        !           574:    on machines that need it.  If FUNCTION_EPILOGUE is not defined
        !           575:    then individual return instructions are generated for each
        !           576:    return statement.  Args are same as for FUNCTION_PROLOGUE.
        !           577: 
        !           578:    The function epilogue should not depend on the current stack pointer!
        !           579:    It should use the frame pointer only.  This is mandatory because
        !           580:    of alloca; we also take advantage of it to omit stack adjustments
        !           581:    before returning.  */
        !           582: 
        !           583: #define FUNCTION_EPILOGUE(FILE, SIZE) \
        !           584: { if (frame_pointer_needed)                                    \
        !           585:     fprintf (FILE, "\tunlk a6\n");                             \
        !           586:   fprintf (FILE, "\trts\n"); }
        !           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: #define INITIAL_FRAME_POINTER_OFFSET(DEPTH)                    \
        !           594: {                                                              \
        !           595:   int regno;                                                   \
        !           596:   int offset = -4;                                             \
        !           597:   for (regno = 16; regno < FIRST_PSEUDO_REGISTER; regno++)     \
        !           598:     if (regs_ever_live[regno] && ! call_used_regs[regno])      \
        !           599:       offset += 12;                                            \
        !           600:   for (regno = 0; regno < 16; regno++)                         \
        !           601:     if (regs_ever_live[regno] && ! call_used_regs[regno])      \
        !           602:       offset += 4;                                             \
        !           603:   (DEPTH) = offset - ((get_frame_size () + 3) & -4);           \
        !           604: }
        !           605: 
        !           606: /* Addressing modes, and classification of registers for them.  */
        !           607: 
        !           608: #define HAVE_POST_INCREMENT
        !           609: /* #define HAVE_POST_DECREMENT */
        !           610: 
        !           611: #define HAVE_PRE_DECREMENT
        !           612: /* #define HAVE_PRE_INCREMENT */
        !           613: 
        !           614: /* Macros to check register numbers against specific register classes.  */
        !           615: 
        !           616: /* These assume that REGNO is a hard or pseudo reg number.
        !           617:    They give nonzero only if REGNO is a hard reg of the suitable class
        !           618:    or a pseudo reg currently allocated to a suitable hard reg.
        !           619:    Since they use reg_renumber, they are safe only once reg_renumber
        !           620:    has been allocated, which happens in local-alloc.c.  */
        !           621: 
        !           622: #define REGNO_OK_FOR_INDEX_P(REGNO) \
        !           623: ((REGNO) < 16 || (unsigned) reg_renumber[REGNO] < 16)
        !           624: #define REGNO_OK_FOR_BASE_P(REGNO) \
        !           625: (((REGNO) ^ 010) < 8 || (unsigned) (reg_renumber[REGNO] ^ 010) < 8)
        !           626: #define REGNO_OK_FOR_DATA_P(REGNO) \
        !           627: ((REGNO) < 8 || (unsigned) reg_renumber[REGNO] < 8)
        !           628: #define REGNO_OK_FOR_FP_P(REGNO) \
        !           629: (((REGNO) ^ 020) < 8 || (unsigned) (reg_renumber[REGNO] ^ 020) < 8)
        !           630: 
        !           631: /* Now macros that check whether X is a register and also,
        !           632:    strictly, whether it is in a specified class.
        !           633: 
        !           634:    These macros are specific to the 68000, and may be used only
        !           635:    in code for printing assembler insns and in conditions for
        !           636:    define_optimization.  */
        !           637: 
        !           638: /* 1 if X is a data register.  */
        !           639: 
        !           640: #define DATA_REG_P(X) (REG_P (X) && REGNO_OK_FOR_DATA_P (REGNO (X)))
        !           641: 
        !           642: /* 1 if X is an fp register.  */
        !           643: 
        !           644: #define FP_REG_P(X) (REG_P (X) && REGNO_OK_FOR_FP_P (REGNO (X)))
        !           645: 
        !           646: /* 1 if X is an address register  */
        !           647: 
        !           648: #define ADDRESS_REG_P(X) (REG_P (X) && REGNO_OK_FOR_BASE_P (REGNO (X)))
        !           649: 
        !           650: /* Maximum number of registers that can appear in a valid memory address.  */
        !           651: 
        !           652: #define MAX_REGS_PER_ADDRESS 2
        !           653: 
        !           654: /* Recognize any constant value that is a valid address.  */
        !           655: 
        !           656: #define CONSTANT_ADDRESS_P(X)   \
        !           657:   (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF             \
        !           658:    || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST               \
        !           659:    || GET_CODE (X) == HIGH)
        !           660: 
        !           661: /* Nonzero if the constant value X is a legitimate general operand.
        !           662:    It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.  */
        !           663: 
        !           664: /* Alliant FP instructions don't take immediate operands, so this
        !           665:    forces them into memory.  */
        !           666: #define LEGITIMATE_CONSTANT_P(X) (GET_CODE (X) != CONST_DOUBLE)
        !           667: 
        !           668: /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
        !           669:    and check its validity for a certain class.
        !           670:    We have two alternate definitions for each of them.
        !           671:    The usual definition accepts all pseudo regs; the other rejects
        !           672:    them unless they have been allocated suitable hard regs.
        !           673:    The symbol REG_OK_STRICT causes the latter definition to be used.
        !           674: 
        !           675:    Most source files want to accept pseudo regs in the hope that
        !           676:    they will get allocated to the class that the insn wants them to be in.
        !           677:    Source files for reload pass need to be strict.
        !           678:    After reload, it makes no difference, since pseudo regs have
        !           679:    been eliminated by then.  */
        !           680: 
        !           681: #ifndef REG_OK_STRICT
        !           682: 
        !           683: /* Nonzero if X is a hard reg that can be used as an index
        !           684:    or if it is a pseudo reg.  */
        !           685: #define REG_OK_FOR_INDEX_P(X) ((REGNO (X) ^ 020) >= 8)
        !           686: /* Nonzero if X is a hard reg that can be used as a base reg
        !           687:    or if it is a pseudo reg.  */
        !           688: #define REG_OK_FOR_BASE_P(X) ((REGNO (X) & ~027) != 0)
        !           689: 
        !           690: #else
        !           691: 
        !           692: /* Nonzero if X is a hard reg that can be used as an index.  */
        !           693: #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
        !           694: /* Nonzero if X is a hard reg that can be used as a base reg.  */
        !           695: #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
        !           696: 
        !           697: #endif
        !           698: 
        !           699: /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
        !           700:    that is a valid memory address for an instruction.
        !           701:    The MODE argument is the machine mode for the MEM expression
        !           702:    that wants to use this address.
        !           703: 
        !           704:    The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS.  */
        !           705: 
        !           706: #define INDIRECTABLE_1_ADDRESS_P(X)  \
        !           707:   (CONSTANT_ADDRESS_P (X)                                              \
        !           708:    || (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X))                   \
        !           709:    || ((GET_CODE (X) == PRE_DEC || GET_CODE (X) == POST_INC)           \
        !           710:        && REG_P (XEXP (X, 0))                                          \
        !           711:        && REG_OK_FOR_BASE_P (XEXP (X, 0)))                             \
        !           712:    || (GET_CODE (X) == PLUS                                            \
        !           713:        && REG_P (XEXP (X, 0)) && REG_OK_FOR_BASE_P (XEXP (X, 0))       \
        !           714:        && GET_CODE (XEXP (X, 1)) == CONST_INT                          \
        !           715:        && ((unsigned) INTVAL (XEXP (X, 1)) + 0x8000) < 0x10000))
        !           716: 
        !           717: #define GO_IF_NONINDEXED_ADDRESS(X, ADDR)  \
        !           718: { if (INDIRECTABLE_1_ADDRESS_P (X)) goto ADDR; }
        !           719: 
        !           720: #define GO_IF_INDEXABLE_BASE(X, ADDR)  \
        !           721: { if (GET_CODE (X) == LABEL_REF) goto ADDR;                            \
        !           722:   if (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X)) goto ADDR; }
        !           723: 
        !           724: #define GO_IF_INDEXING(X, ADDR)        \
        !           725: { if (GET_CODE (X) == PLUS && LEGITIMATE_INDEX_P (XEXP (X, 0)))                \
        !           726:     { GO_IF_INDEXABLE_BASE (XEXP (X, 1), ADDR); }                      \
        !           727:   if (GET_CODE (X) == PLUS && LEGITIMATE_INDEX_P (XEXP (X, 1)))                \
        !           728:     { GO_IF_INDEXABLE_BASE (XEXP (X, 0), ADDR); } }
        !           729: 
        !           730: #define GO_IF_INDEXED_ADDRESS(X, ADDR)  \
        !           731: { GO_IF_INDEXING (X, ADDR);                                            \
        !           732:   if (GET_CODE (X) == PLUS)                                            \
        !           733:     { if (GET_CODE (XEXP (X, 1)) == CONST_INT                          \
        !           734:          && (unsigned) INTVAL (XEXP (X, 1)) + 0x80 < 0x100)            \
        !           735:        { rtx go_temp = XEXP (X, 0); GO_IF_INDEXING (go_temp, ADDR); }  \
        !           736:       if (GET_CODE (XEXP (X, 0)) == CONST_INT                          \
        !           737:          && (unsigned) INTVAL (XEXP (X, 0)) + 0x80 < 0x100)            \
        !           738:        { rtx go_temp = XEXP (X, 1); GO_IF_INDEXING (go_temp, ADDR); } } }
        !           739: 
        !           740: #define LEGITIMATE_INDEX_REG_P(X)   \
        !           741:   ((GET_CODE (X) == REG && REG_OK_FOR_INDEX_P (X))     \
        !           742:    || (GET_CODE (X) == SIGN_EXTEND                     \
        !           743:        && GET_CODE (XEXP (X, 0)) == REG                        \
        !           744:        && GET_MODE (XEXP (X, 0)) == HImode             \
        !           745:        && REG_OK_FOR_INDEX_P (XEXP (X, 0))))
        !           746: 
        !           747: #define LEGITIMATE_INDEX_P(X)   \
        !           748:    (LEGITIMATE_INDEX_REG_P (X)                         \
        !           749:     || (TARGET_68020 && GET_CODE (X) == MULT           \
        !           750:        && LEGITIMATE_INDEX_REG_P (XEXP (X, 0))         \
        !           751:        && GET_CODE (XEXP (X, 1)) == CONST_INT          \
        !           752:        && (INTVAL (XEXP (X, 1)) == 2                   \
        !           753:            || INTVAL (XEXP (X, 1)) == 4                \
        !           754:            || INTVAL (XEXP (X, 1)) == 8)))
        !           755: 
        !           756: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR)  \
        !           757: { GO_IF_NONINDEXED_ADDRESS (X, ADDR);                  \
        !           758:   GO_IF_INDEXED_ADDRESS (X, ADDR); }
        !           759: 
        !           760: /* Try machine-dependent ways of modifying an illegitimate address
        !           761:    to be legitimate.  If we find one, return the new, valid address.
        !           762:    This macro is used in only one place: `memory_address' in explow.c.
        !           763: 
        !           764:    OLDX is the address as it was before break_out_memory_refs was called.
        !           765:    In some cases it is useful to look at this to decide what needs to be done.
        !           766: 
        !           767:    MODE and WIN are passed so that this macro can use
        !           768:    GO_IF_LEGITIMATE_ADDRESS.
        !           769: 
        !           770:    It is always safe for this macro to do nothing.  It exists to recognize
        !           771:    opportunities to optimize the output.
        !           772: 
        !           773:    For the 68000, we handle X+REG by loading X into a register R and
        !           774:    using R+REG.  R will go in an address reg and indexing will be used.
        !           775:    However, if REG is a broken-out memory address or multiplication,
        !           776:    nothing needs to be done because REG can certainly go in an address reg.  */
        !           777: 
        !           778: #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN)   \
        !           779: { register int ch = (X) != (OLDX);                                     \
        !           780:   if (GET_CODE (X) == PLUS)                                            \
        !           781:     { if (GET_CODE (XEXP (X, 0)) == MULT)                              \
        !           782:        ch = 1, XEXP (X, 0) = force_operand (XEXP (X, 0), 0);           \
        !           783:       if (GET_CODE (XEXP (X, 1)) == MULT)                              \
        !           784:        ch = 1, XEXP (X, 1) = force_operand (XEXP (X, 1), 0);           \
        !           785:       if (ch && GET_CODE (XEXP (X, 1)) == REG                          \
        !           786:          && GET_CODE (XEXP (X, 0)) == REG)                             \
        !           787:        goto WIN;                                                       \
        !           788:       if (ch) { GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN); }             \
        !           789:       if (GET_CODE (XEXP (X, 0)) == REG                                        \
        !           790:               || (GET_CODE (XEXP (X, 0)) == SIGN_EXTEND                \
        !           791:                   && GET_CODE (XEXP (XEXP (X, 0), 0)) == REG           \
        !           792:                   && GET_MODE (XEXP (XEXP (X, 0), 0)) == HImode))      \
        !           793:        { register rtx temp = gen_reg_rtx (Pmode);                      \
        !           794:          register rtx val = force_operand (XEXP (X, 1), 0);            \
        !           795:          emit_move_insn (temp, val);                                   \
        !           796:          XEXP (X, 1) = temp;                                           \
        !           797:          goto WIN; }                                                   \
        !           798:       else if (GET_CODE (XEXP (X, 1)) == REG                           \
        !           799:               || (GET_CODE (XEXP (X, 1)) == SIGN_EXTEND                \
        !           800:                   && GET_CODE (XEXP (XEXP (X, 1), 0)) == REG           \
        !           801:                   && GET_MODE (XEXP (XEXP (X, 1), 0)) == HImode))      \
        !           802:        { register rtx temp = gen_reg_rtx (Pmode);                      \
        !           803:          register rtx val = force_operand (XEXP (X, 0), 0);            \
        !           804:          emit_move_insn (temp, val);                                   \
        !           805:          XEXP (X, 0) = temp;                                           \
        !           806:          goto WIN; }}}
        !           807: 
        !           808: /* Go to LABEL if ADDR (a legitimate address expression)
        !           809:    has an effect that depends on the machine mode it is used for.
        !           810:    On the 68000, only predecrement and postincrement address depend thus
        !           811:    (the amount of decrement or increment being the length of the operand).  */
        !           812: 
        !           813: #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)       \
        !           814:  if (GET_CODE (ADDR) == POST_INC || GET_CODE (ADDR) == PRE_DEC) goto LABEL
        !           815: 
        !           816: /* Specify the machine mode that this machine uses
        !           817:    for the index in the tablejump instruction.  */
        !           818: #define CASE_VECTOR_MODE HImode
        !           819: 
        !           820: /* Define this if the tablejump instruction expects the table
        !           821:    to contain offsets from the address of the table.
        !           822:    Do not define this if the table should contain absolute addresses.  */
        !           823: #define CASE_VECTOR_PC_RELATIVE
        !           824: 
        !           825: /* Specify the tree operation to be used to convert reals to integers.  */
        !           826: #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
        !           827: 
        !           828: /* This is the kind of divide that is easiest to do in the general case.  */
        !           829: #define EASY_DIV_EXPR TRUNC_DIV_EXPR
        !           830: 
        !           831: /* Define this as 1 if `char' should by default be signed; else as 0.  */
        !           832: #define DEFAULT_SIGNED_CHAR 1
        !           833: 
        !           834: /* Max number of bytes we can move from memory to memory
        !           835:    in one reasonably fast instruction.  */
        !           836: #define MOVE_MAX 4
        !           837: 
        !           838: /* Define this if zero-extension is slow (more than one real instruction).  */
        !           839: #define SLOW_ZERO_EXTEND
        !           840: 
        !           841: /* Nonzero if access to memory by bytes is slow and undesirable.  */
        !           842: #define SLOW_BYTE_ACCESS 0
        !           843: 
        !           844: /* Define this to be nonzero if shift instructions ignore all but the low-order
        !           845:    few bits. */
        !           846: #define SHIFT_COUNT_TRUNCATED 1
        !           847: 
        !           848: /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
        !           849:    is done just by pretending it is already truncated.  */
        !           850: #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
        !           851: 
        !           852: /* We assume that the store-condition-codes instructions store 0 for false
        !           853:    and some other value for true.  This is the value stored for true.  */
        !           854: 
        !           855: #define STORE_FLAG_VALUE -1
        !           856: 
        !           857: /* When a prototype says `char' or `short', really pass an `int'.  */
        !           858: #define PROMOTE_PROTOTYPES
        !           859: 
        !           860: /* Specify the machine mode that pointers have.
        !           861:    After generation of rtl, the compiler makes no further distinction
        !           862:    between pointers and any other objects of this machine mode.  */
        !           863: #define Pmode SImode
        !           864: 
        !           865: /* A function address in a call instruction
        !           866:    is a byte address (for indexing purposes)
        !           867:    so give the MEM rtx a byte's mode.  */
        !           868: #define FUNCTION_MODE QImode
        !           869: 
        !           870: /* Compute the cost of computing a constant rtl expression RTX
        !           871:    whose rtx-code is CODE.  The body of this macro is a portion
        !           872:    of a switch statement.  If the code is computed here,
        !           873:    return it with a return statement.  Otherwise, break from the switch.  */
        !           874: 
        !           875: #define CONST_COSTS(RTX,CODE,OUTER_CODE) \
        !           876:   case CONST_INT:                                              \
        !           877:     /* Constant zero is super cheap due to clr instruction.  */        \
        !           878:     if (RTX == const0_rtx) return 0;                           \
        !           879:     if ((unsigned) INTVAL (RTX) < 077) return 1;               \
        !           880:   case CONST:                                                  \
        !           881:   case LABEL_REF:                                              \
        !           882:   case SYMBOL_REF:                                             \
        !           883:     return 3;                                                  \
        !           884:   case CONST_DOUBLE:                                           \
        !           885:     return 5;
        !           886: 
        !           887: /* Check a `double' value for validity for a particular machine mode.
        !           888:    This is defined to avoid crashes outputting certain constants.  */
        !           889: 
        !           890: #define CHECK_FLOAT_VALUE(mode, d)                                     \
        !           891:   if ((mode) == SFmode)                                                        \
        !           892:     {                                                                  \
        !           893:       if ((d) > 3.4028234663852890e+38)                                        \
        !           894:        { warning ("magnitude of value too large for `float'");         \
        !           895:          (d) = 3.4028234663852890e+38; }                               \
        !           896:       else if ((d) < -3.4028234663852890e+38)                          \
        !           897:        { warning ("magnitude of value too large for `float'");         \
        !           898:          (d) = -3.4028234663852890e+38; }                              \
        !           899:       else if (((d) > 0) && ((d) < 1.1754943508222873e-38))            \
        !           900:        (d) = 0.0;                                                      \
        !           901:       else if (((d) < 0) && ((d) > -1.1754943508222873e-38))           \
        !           902:        (d) = 0.0;                                                      \
        !           903:     }
        !           904: 
        !           905: /* Tell final.c how to eliminate redundant test instructions.  */
        !           906: 
        !           907: /* Here we define machine-dependent flags and fields in cc_status
        !           908:    (see `conditions.h').  */
        !           909: 
        !           910: /* On the Alliant, floating-point instructions do not modify the
        !           911:    ordinary CC register.  Only fcmp and ftest instructions modify the
        !           912:    floating-point CC register.  We should actually keep track of what
        !           913:    both kinds of CC registers contain, but for now we only consider
        !           914:    the most recent instruction that has set either register.  */
        !           915: 
        !           916: /* Set if the cc value came from a floating point test, so a floating
        !           917:    point conditional branch must be output.  */
        !           918: #define CC_IN_FP 04000
        !           919: 
        !           920: /* Store in cc_status the expressions
        !           921:    that the condition codes will describe
        !           922:    after execution of an instruction whose pattern is EXP.
        !           923:    Do not alter them if the instruction would not alter the cc's.  */
        !           924: 
        !           925: /* On the 68000, all the insns to store in an address register
        !           926:    fail to set the cc's.  However, in some cases these instructions
        !           927:    can make it possibly invalid to use the saved cc's.  In those
        !           928:    cases we clear out some or all of the saved cc's so they won't be used.  */
        !           929: 
        !           930: #define NOTICE_UPDATE_CC(EXP, INSN) \
        !           931: {                                                              \
        !           932:   if (GET_CODE (EXP) == SET)                                   \
        !           933:     { if (ADDRESS_REG_P (SET_DEST (EXP)) || FP_REG_P (SET_DEST (EXP)))     \
        !           934:        { if (cc_status.value1                                  \
        !           935:              && reg_overlap_mentioned_p (SET_DEST (EXP), cc_status.value1)) \
        !           936:            cc_status.value1 = 0;                               \
        !           937:          if (cc_status.value2                                  \
        !           938:              && reg_overlap_mentioned_p (SET_DEST (EXP), cc_status.value2)) \
        !           939:            cc_status.value2 = 0; }                             \
        !           940:       else if (GET_CODE (SET_SRC (EXP)) == MOD                 \
        !           941:               || GET_CODE (SET_SRC (EXP)) == UMOD              \
        !           942:               || (GET_CODE (SET_SRC (EXP)) == TRUNCATE         \
        !           943:                   && (GET_CODE (XEXP (SET_SRC (EXP))) == MOD   \
        !           944:                       || GET_CODE (XEXP (SET_SRC (EXP))) == UMOD)))    \
        !           945:        /* The swap insn produces cc's that don't correspond to the     \
        !           946:           result.  */                                          \
        !           947:         CC_STATUS_INIT;                                                \
        !           948:       else if (SET_DEST (EXP) != cc0_rtx                               \
        !           949:               && (FP_REG_P (SET_SRC (EXP))                     \
        !           950:                   || GET_CODE (SET_SRC (EXP)) == FIX           \
        !           951:                   || GET_CODE (SET_SRC (EXP)) == FLOAT_TRUNCATE \
        !           952:                   || GET_CODE (SET_SRC (EXP)) == FLOAT_EXTEND)) \
        !           953:        { CC_STATUS_INIT; }                                     \
        !           954:       /* A pair of move insns doesn't produce a useful overall cc.  */ \
        !           955:       else if (!FP_REG_P (SET_DEST (EXP))                      \
        !           956:               && !FP_REG_P (SET_SRC (EXP))                     \
        !           957:               && GET_MODE_SIZE (GET_MODE (SET_SRC (EXP))) > 4  \
        !           958:               && (GET_CODE (SET_SRC (EXP)) == REG              \
        !           959:                   || GET_CODE (SET_SRC (EXP)) == MEM           \
        !           960:                   || GET_CODE (SET_SRC (EXP)) == CONST_DOUBLE))\
        !           961:        { CC_STATUS_INIT; }                                     \
        !           962:       else if (GET_CODE (SET_SRC (EXP)) == CALL)               \
        !           963:        { CC_STATUS_INIT; }                                     \
        !           964:       else if (XEXP (EXP, 0) != pc_rtx)                                \
        !           965:        { cc_status.flags = 0;                                  \
        !           966:          cc_status.value1 = XEXP (EXP, 0);                     \
        !           967:          cc_status.value2 = XEXP (EXP, 1); } }                 \
        !           968:   else if (GET_CODE (EXP) == PARALLEL                          \
        !           969:           && GET_CODE (XVECEXP (EXP, 0, 0)) == SET)            \
        !           970:     {                                                          \
        !           971:       if (ADDRESS_REG_P (XEXP (XVECEXP (EXP, 0, 0), 0)))       \
        !           972:        CC_STATUS_INIT;                                         \
        !           973:       else if (XEXP (XVECEXP (EXP, 0, 0), 0) != pc_rtx)                \
        !           974:        { cc_status.flags = 0;                                  \
        !           975:          cc_status.value1 = XEXP (XVECEXP (EXP, 0, 0), 0);     \
        !           976:          cc_status.value2 = XEXP (XVECEXP (EXP, 0, 0), 1); } } \
        !           977:   else CC_STATUS_INIT;                                         \
        !           978:   if (cc_status.value2 != 0                                    \
        !           979:       && ADDRESS_REG_P (cc_status.value2)                      \
        !           980:       && GET_MODE (cc_status.value2) == QImode)                        \
        !           981:     CC_STATUS_INIT;                                            \
        !           982:   if (cc_status.value2 != 0)                                   \
        !           983:     switch (GET_CODE (cc_status.value2))                       \
        !           984:       { case PLUS: case MINUS: case MULT:                      \
        !           985:        case DIV: case UDIV: case MOD: case UMOD: case NEG:     \
        !           986:        case ASHIFT: case LSHIFT: case ASHIFTRT: case LSHIFTRT: \
        !           987:        case ROTATE: case ROTATERT:                             \
        !           988:          if (GET_MODE (cc_status.value2) != VOIDmode)          \
        !           989:            cc_status.flags |= CC_NO_OVERFLOW;                  \
        !           990:          break;                                                \
        !           991:        case ZERO_EXTEND:                                       \
        !           992:          /* (SET r1 (ZERO_EXTEND r2)) on this machine
        !           993:             ends with a move insn moving r2 in r2's mode.
        !           994:             Thus, the cc's are set for r2.
        !           995:             This can set N bit spuriously. */                  \
        !           996:          cc_status.flags |= CC_NOT_NEGATIVE; }                 \
        !           997:   if (cc_status.value1 && GET_CODE (cc_status.value1) == REG   \
        !           998:       && cc_status.value2                                      \
        !           999:       && reg_overlap_mentioned_p (cc_status.value1, cc_status.value2)) \
        !          1000:     cc_status.value2 = 0;                                      \
        !          1001:   if ((cc_status.value1 && FP_REG_P (cc_status.value1))                \
        !          1002:        || (cc_status.value2 && FP_REG_P (cc_status.value2)))   \
        !          1003:     cc_status.flags = CC_IN_FP; }
        !          1004: 
        !          1005: #define OUTPUT_JUMP(NORMAL, FLOAT, NO_OV)  \
        !          1006: { if (cc_prev_status.flags & CC_IN_FP)                 \
        !          1007:     return FLOAT;                                              \
        !          1008:   if (cc_prev_status.flags & CC_NO_OVERFLOW)                   \
        !          1009:     return NO_OV;                                              \
        !          1010:   return NORMAL; }
        !          1011: 
        !          1012: /* Control the assembler format that we output.  */
        !          1013: 
        !          1014: /* Output at beginning of assembler file.  */
        !          1015: 
        !          1016: #define ASM_FILE_START(FILE)   \
        !          1017:   fprintf (FILE, "#NO_APP\n");
        !          1018: 
        !          1019: /* Output to assembler file text saying following lines
        !          1020:    may contain character constants, extra white space, comments, etc.  */
        !          1021: 
        !          1022: #define ASM_APP_ON "#APP\n"
        !          1023: 
        !          1024: /* Output to assembler file text saying following lines
        !          1025:    no longer contain unusual constructs.  */
        !          1026: 
        !          1027: #define ASM_APP_OFF "#NO_APP\n"
        !          1028: 
        !          1029: /* Output before read-only data.  */
        !          1030: 
        !          1031: #define TEXT_SECTION_ASM_OP ".text"
        !          1032: 
        !          1033: /* Output before writable data.  */
        !          1034: 
        !          1035: #define DATA_SECTION_ASM_OP ".data"
        !          1036: 
        !          1037: /* How to refer to registers in assembler output.
        !          1038:    This sequence is indexed by compiler's hard-register-number (see above).  */
        !          1039: 
        !          1040: #define REGISTER_NAMES \
        !          1041: {"d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7",       \
        !          1042:  "a0", "a1", "a2", "a3", "a4", "a5", "a6", "sp",       \
        !          1043:  "fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7" }
        !          1044: 
        !          1045: /* How to renumber registers for dbx and gdb.
        !          1046:    On the Sun-3, the floating point registers have numbers
        !          1047:    18 to 25, not 16 to 23 as they do in the compiler.  */
        !          1048: /* (On the Alliant, dbx isn't working yet at all.  */
        !          1049: 
        !          1050: #define DBX_REGISTER_NUMBER(REGNO) ((REGNO) < 16 ? (REGNO) : (REGNO) + 2)
        !          1051: 
        !          1052: /* This is how to output the definition of a user-level label named NAME,
        !          1053:    such as the label on a static function or variable NAME.  */
        !          1054: 
        !          1055: #define ASM_OUTPUT_LABEL(FILE,NAME)    \
        !          1056:   do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
        !          1057: 
        !          1058: /* This is how to output a command to make the user-level label named NAME
        !          1059:    defined for reference from other files.  */
        !          1060: 
        !          1061: #define ASM_GLOBALIZE_LABEL(FILE,NAME) \
        !          1062:   do { fputs ("\t.globl ", FILE); assemble_name (FILE, NAME); fputs ("\n", FILE);} while (0)
        !          1063: 
        !          1064: /* This is how to output a reference to a user-level label named NAME.
        !          1065:    `assemble_name' uses this.  */
        !          1066: 
        !          1067: #define ASM_OUTPUT_LABELREF(FILE,NAME) \
        !          1068:   fprintf (FILE, "_%s", NAME)
        !          1069: 
        !          1070: /* This is how to output an internal numbered label where
        !          1071:    PREFIX is the class of label and NUM is the number within the class.  */
        !          1072: 
        !          1073: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)     \
        !          1074:   fprintf (FILE, "%s%d:\n", PREFIX, NUM)
        !          1075: 
        !          1076: /* This is how to store into the string LABEL
        !          1077:    the symbol_ref name of an internal numbered label where
        !          1078:    PREFIX is the class of label and NUM is the number within the class.
        !          1079:    This is suitable for output with `assemble_name'.  */
        !          1080: 
        !          1081: #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)  \
        !          1082:   sprintf (LABEL, "*%s%d", PREFIX, NUM)
        !          1083: 
        !          1084: /* This is how to output an assembler line defining a `double' constant.  */
        !          1085: 
        !          1086: #define ASM_OUTPUT_DOUBLE(FILE,VALUE)  \
        !          1087: do { union { double d; long v[2];} tem;                        \
        !          1088:      tem.d = (VALUE);                                  \
        !          1089:      fprintf (FILE, "\t.long 0x%x,0x%x\n", tem.v[0], tem.v[1]);        \
        !          1090:    } while (0)
        !          1091: 
        !          1092: /* This is how to output an assembler line defining a `float' constant.  */
        !          1093: 
        !          1094: #define ASM_OUTPUT_FLOAT(FILE,VALUE)  \
        !          1095: do { union { float f; long l;} tem;                    \
        !          1096:      tem.f = (VALUE);                                  \
        !          1097:      fprintf (FILE, "\t.long 0x%x\n", tem.l);  \
        !          1098:    } while (0)
        !          1099: 
        !          1100: /* This is how to output an assembler line defining an `int' constant.  */
        !          1101: 
        !          1102: #define ASM_OUTPUT_INT(FILE,VALUE)  \
        !          1103: ( fprintf (FILE, "\t.long "),                  \
        !          1104:   output_addr_const (FILE, (VALUE)),           \
        !          1105:   fprintf (FILE, "\n"))
        !          1106: 
        !          1107: /* Likewise for `char' and `short' constants.  */
        !          1108: 
        !          1109: #define ASM_OUTPUT_SHORT(FILE,VALUE)  \
        !          1110: ( fprintf (FILE, "\t.word "),                  \
        !          1111:   output_addr_const (FILE, (VALUE)),           \
        !          1112:   fprintf (FILE, "\n"))
        !          1113: 
        !          1114: #define ASM_OUTPUT_CHAR(FILE,VALUE)  \
        !          1115: ( fprintf (FILE, "\t.byte "),                  \
        !          1116:   output_addr_const (FILE, (VALUE)),           \
        !          1117:   fprintf (FILE, "\n"))
        !          1118: 
        !          1119: #define ASM_OUTPUT_ASCII(FILE,PTR,SIZE)               \
        !          1120: { int i; unsigned char *pp = (unsigned char *) (PTR);          \
        !          1121:   fprintf((FILE), "\t.byte %d", (unsigned int)*pp++);          \
        !          1122:   for (i = 1; i < (SIZE); ++i, ++pp) {                         \
        !          1123:     if ((i % 8) == 0)                                          \
        !          1124:       fprintf((FILE), "\n\t.byte %d", (unsigned int) *pp);     \
        !          1125:     else                                                       \
        !          1126:       fprintf((FILE), ",%d", (unsigned int) *pp); }            \
        !          1127:   fprintf ((FILE), "\n");       }
        !          1128: 
        !          1129: /* This is how to output an assembler line for a numeric constant byte.  */
        !          1130: 
        !          1131: #define ASM_OUTPUT_BYTE(FILE,VALUE)  \
        !          1132:   fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
        !          1133: 
        !          1134: /* This is how to output an insn to push a register on the stack.
        !          1135:    It need not be very fast code.  */
        !          1136: 
        !          1137: #define ASM_OUTPUT_REG_PUSH(FILE,REGNO)  \
        !          1138:   fprintf (FILE, "\tmovl %s,sp@-\n", reg_names[REGNO])
        !          1139: 
        !          1140: /* This is how to output an insn to pop a register from the stack.
        !          1141:    It need not be very fast code.  */
        !          1142: 
        !          1143: #define ASM_OUTPUT_REG_POP(FILE,REGNO)  \
        !          1144:   fprintf (FILE, "\tmovl sp@+,%s\n", reg_names[REGNO])
        !          1145: 
        !          1146: /* This is how to output an element of a case-vector that is absolute.
        !          1147:    (The 68000 does not use such vectors,
        !          1148:    but we must define this macro anyway.)  */
        !          1149: 
        !          1150: #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
        !          1151:   fprintf (FILE, "\t.long L%d\n", VALUE)
        !          1152: 
        !          1153: /* This is how to output an element of a case-vector that is relative.  */
        !          1154: 
        !          1155: #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL)  \
        !          1156:   fprintf (FILE, "\t.word L%d-L%d\n", VALUE, REL)
        !          1157: 
        !          1158: /* This is how to output an assembler line
        !          1159:    that says to advance the location counter
        !          1160:    to a multiple of 2**LOG bytes.  */
        !          1161: 
        !          1162: #define ASM_OUTPUT_ALIGN(FILE,LOG)     \
        !          1163:   if ((LOG) == 1)                      \
        !          1164:     fprintf (FILE, "\t.even\n");       \
        !          1165:   else if ((LOG) != 0)                 \
        !          1166:     fprintf (FILE, "\t.align %dn", (LOG));     
        !          1167: 
        !          1168: #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
        !          1169:   fprintf (FILE, "\t. = . + %u\n", (SIZE))
        !          1170: 
        !          1171: /* This says how to output an assembler line
        !          1172:    to define a global common symbol.  */
        !          1173: 
        !          1174: #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
        !          1175: ( fputs ("\t.comm ", (FILE)),                  \
        !          1176:   assemble_name ((FILE), (NAME)),              \
        !          1177:   fprintf ((FILE), ",%u\n", (ROUNDED)))
        !          1178: 
        !          1179: /* This says how to output an assembler line
        !          1180:    to define a local common symbol.  */
        !          1181: 
        !          1182: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
        !          1183: ( fputs ("\t.lcomm ", (FILE)),                 \
        !          1184:   assemble_name ((FILE), (NAME)),              \
        !          1185:   fprintf ((FILE), ",%u\n", (ROUNDED)))
        !          1186: 
        !          1187: /* Store in OUTPUT a string (made with alloca) containing
        !          1188:    an assembler-name for a local static variable named NAME.
        !          1189:    LABELNO is an integer which is different for each call.  */
        !          1190: 
        !          1191: #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
        !          1192: ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10),   \
        !          1193:   sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
        !          1194: 
        !          1195: /* Define the parentheses used to group arithmetic operations
        !          1196:    in assembler code.  */
        !          1197: 
        !          1198: #define ASM_OPEN_PAREN "("
        !          1199: #define ASM_CLOSE_PAREN ")"
        !          1200: 
        !          1201: /* Define results of standard character escape sequences.  */
        !          1202: #define TARGET_BELL 007
        !          1203: #define TARGET_BS 010
        !          1204: #define TARGET_TAB 011
        !          1205: #define TARGET_NEWLINE 012
        !          1206: #define TARGET_VT 013
        !          1207: #define TARGET_FF 014
        !          1208: #define TARGET_CR 015
        !          1209: 
        !          1210: /* Print operand X (an rtx) in assembler syntax to file FILE.
        !          1211:    CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
        !          1212:    For `%' followed by punctuation, CODE is the punctuation and X is null.
        !          1213: 
        !          1214:    On the Alliant, we use several CODE characters:
        !          1215:    '.' for dot needed in Motorola-style opcode names.
        !          1216:    '-' for an operand pushing on the stack:
        !          1217:        sp@-, -(sp) or -(%sp) depending on the style of syntax.
        !          1218:    '+' for an operand pushing on the stack:
        !          1219:        sp@+, (sp)+ or (%sp)+ depending on the style of syntax.
        !          1220:    '@' for a reference to the top word on the stack:
        !          1221:        sp@, (sp) or (%sp) depending on the style of syntax.
        !          1222:    '#' for an immediate operand prefix (# in MIT and Motorola syntax
        !          1223:        but & in SGS syntax).
        !          1224:    '!' for the cc register (used in an `and to cc' insn).
        !          1225: 
        !          1226:    'b' for byte insn (no effect, on the Sun; this is for the ISI).
        !          1227:    'd' to force memory addressing to be absolute, not relative.
        !          1228:    'f' for float insn (print a CONST_DOUBLE as a float rather than in hex)
        !          1229:    'x' for float insn (print a CONST_DOUBLE as a float rather than in hex),
        !          1230:        or print pair of registers as rx:ry.  */
        !          1231: 
        !          1232: #define PRINT_OPERAND_PUNCT_VALID_P(CODE)                              \
        !          1233:   ((CODE) == '.' || (CODE) == '#' || (CODE) == '-'                     \
        !          1234:    || (CODE) == '+' || (CODE) == '@' || (CODE) == '!')
        !          1235: 
        !          1236: #define PRINT_OPERAND(FILE, X, CODE)  \
        !          1237: { int i;                                                               \
        !          1238:   if (CODE == '.') ;                                                   \
        !          1239:   else if (CODE == '#') fprintf (FILE, "#");                           \
        !          1240:   else if (CODE == '-') fprintf (FILE, "sp@-");                                \
        !          1241:   else if (CODE == '+') fprintf (FILE, "sp@+");                                \
        !          1242:   else if (CODE == '@') fprintf (FILE, "sp@");                         \
        !          1243:   else if (CODE == '!') fprintf (FILE, "cc");                          \
        !          1244:   else if ((X)  == 0  ) ;                                              \
        !          1245:   else if (GET_CODE (X) == REG)                                                \
        !          1246:     { if (REGNO (X) < 16 && (CODE == 'y' || CODE == 'x') && GET_MODE (X) == DFmode)    \
        !          1247:         fprintf (FILE, "%s,%s", reg_names[REGNO (X)], reg_names[REGNO (X)+1]); \
        !          1248:       else                                                             \
        !          1249:         fprintf (FILE, "%s", reg_names[REGNO (X)]);                    \
        !          1250:     }                                                                  \
        !          1251:   else if (GET_CODE (X) == MEM)                                                \
        !          1252:     {                                                                  \
        !          1253:       output_address (XEXP (X, 0));                                    \
        !          1254:       if (CODE == 'd' && ! TARGET_68020                                        \
        !          1255:          && CONSTANT_ADDRESS_P (XEXP (X, 0))                           \
        !          1256:          && !(GET_CODE (XEXP (X, 0)) == CONST_INT                      \
        !          1257:               && INTVAL (XEXP (X, 0)) < 0x8000                         \
        !          1258:               && INTVAL (XEXP (X, 0)) >= -0x8000))                     \
        !          1259:        fprintf (FILE, ":l");                                           \
        !          1260:     }                                                                  \
        !          1261:   else if (GET_CODE (X) == CONST_DOUBLE && GET_MODE (X) == SFmode)     \
        !          1262:     { union { double d; int i[2]; } u;                                 \
        !          1263:       union { float f; int i; } u1;                                    \
        !          1264:       u.i[0] = CONST_DOUBLE_LOW (X); u.i[1] = CONST_DOUBLE_HIGH (X);   \
        !          1265:       u1.f = u.d;                                                      \
        !          1266:       if (CODE == 'f')                                                 \
        !          1267:         fprintf (FILE, "#0r%.9g", u1.f);                               \
        !          1268:       else                                                             \
        !          1269:         fprintf (FILE, "#0x%x", u1.i); }                               \
        !          1270:   else if (GET_CODE (X) == CONST_DOUBLE && GET_MODE (X) != DImode)     \
        !          1271:     { union { double d; int i[2]; } u;                                 \
        !          1272:       u.i[0] = CONST_DOUBLE_LOW (X); u.i[1] = CONST_DOUBLE_HIGH (X);   \
        !          1273:       fprintf (FILE, "#0r%.20g", u.d); }                               \
        !          1274:   else { putc ('#', FILE); output_addr_const (FILE, X); }}
        !          1275: 
        !          1276: /* Note that this contains a kludge that knows that the only reason
        !          1277:    we have an address (plus (label_ref...) (reg...))
        !          1278:    is in the insn before a tablejump, and we know that m68k.md
        !          1279:    generates a label LInnn: on such an insn.  */
        !          1280: #define PRINT_OPERAND_ADDRESS(FILE, ADDR)  \
        !          1281: { register rtx reg1, reg2, breg, ireg;                                 \
        !          1282:   register rtx addr = ADDR;                                            \
        !          1283:   static char *sz = ".BW.L...D";                                       \
        !          1284:   rtx offset;                                                          \
        !          1285:   switch (GET_CODE (addr))                                             \
        !          1286:     {                                                                  \
        !          1287:     case REG:                                                          \
        !          1288:       fprintf (FILE, "%s@", reg_names[REGNO (addr)]);                  \
        !          1289:       break;                                                           \
        !          1290:     case PRE_DEC:                                                      \
        !          1291:       fprintf (FILE, "%s@-", reg_names[REGNO (XEXP (addr, 0))]);       \
        !          1292:       break;                                                           \
        !          1293:     case POST_INC:                                                     \
        !          1294:       fprintf (FILE, "%s@+", reg_names[REGNO (XEXP (addr, 0))]);       \
        !          1295:       break;                                                           \
        !          1296:     case PLUS:                                                         \
        !          1297:       reg1 = 0;        reg2 = 0;                                               \
        !          1298:       ireg = 0;        breg = 0;                                               \
        !          1299:       offset = 0;                                                      \
        !          1300:       if (CONSTANT_ADDRESS_P (XEXP (addr, 0)))                         \
        !          1301:        {                                                               \
        !          1302:          offset = XEXP (addr, 0);                                      \
        !          1303:          addr = XEXP (addr, 1);                                        \
        !          1304:        }                                                               \
        !          1305:       else if (CONSTANT_ADDRESS_P (XEXP (addr, 1)))                    \
        !          1306:        {                                                               \
        !          1307:          offset = XEXP (addr, 1);                                      \
        !          1308:          addr = XEXP (addr, 0);                                        \
        !          1309:        }                                                               \
        !          1310:       if (GET_CODE (addr) != PLUS) ;                                   \
        !          1311:       else if (GET_CODE (XEXP (addr, 0)) == SIGN_EXTEND)               \
        !          1312:        {                                                               \
        !          1313:          reg1 = XEXP (addr, 0);                                        \
        !          1314:          addr = XEXP (addr, 1);                                        \
        !          1315:        }                                                               \
        !          1316:       else if (GET_CODE (XEXP (addr, 1)) == SIGN_EXTEND)               \
        !          1317:        {                                                               \
        !          1318:          reg1 = XEXP (addr, 1);                                        \
        !          1319:          addr = XEXP (addr, 0);                                        \
        !          1320:        }                                                               \
        !          1321:       else if (GET_CODE (XEXP (addr, 0)) == MULT)                      \
        !          1322:        {                                                               \
        !          1323:          reg1 = XEXP (addr, 0);                                        \
        !          1324:          addr = XEXP (addr, 1);                                        \
        !          1325:        }                                                               \
        !          1326:       else if (GET_CODE (XEXP (addr, 1)) == MULT)                      \
        !          1327:        {                                                               \
        !          1328:          reg1 = XEXP (addr, 1);                                        \
        !          1329:          addr = XEXP (addr, 0);                                        \
        !          1330:        }                                                               \
        !          1331:       else if (GET_CODE (XEXP (addr, 0)) == REG)                       \
        !          1332:        {                                                               \
        !          1333:          reg1 = XEXP (addr, 0);                                        \
        !          1334:          addr = XEXP (addr, 1);                                        \
        !          1335:        }                                                               \
        !          1336:       else if (GET_CODE (XEXP (addr, 1)) == REG)                       \
        !          1337:        {                                                               \
        !          1338:          reg1 = XEXP (addr, 1);                                        \
        !          1339:          addr = XEXP (addr, 0);                                        \
        !          1340:        }                                                               \
        !          1341:       if (GET_CODE (addr) == REG || GET_CODE (addr) == MULT            \
        !          1342:          || GET_CODE (addr) == SIGN_EXTEND)                            \
        !          1343:        { if (reg1 == 0) reg1 = addr; else reg2 = addr; addr = 0; }     \
        !          1344: /*  for OLD_INDEXING                                                   \
        !          1345:       else if (GET_CODE (addr) == PLUS)                                        \
        !          1346:        {                                                               \
        !          1347:          if (GET_CODE (XEXP (addr, 0)) == REG)                         \
        !          1348:            {                                                           \
        !          1349:              reg2 = XEXP (addr, 0);                                    \
        !          1350:              addr = XEXP (addr, 1);                                    \
        !          1351:            }                                                           \
        !          1352:          else if (GET_CODE (XEXP (addr, 1)) == REG)                    \
        !          1353:            {                                                           \
        !          1354:              reg2 = XEXP (addr, 1);                                    \
        !          1355:              addr = XEXP (addr, 0);                                    \
        !          1356:            }                                                           \
        !          1357:        }                                                               \
        !          1358:   */                                                                   \
        !          1359:       if (offset != 0) { if (addr != 0) abort (); addr = offset; }     \
        !          1360:       if ((reg1 && (GET_CODE (reg1) == SIGN_EXTEND                     \
        !          1361:                    || GET_CODE (reg1) == MULT))                        \
        !          1362:          || (reg2 != 0 && REGNO_OK_FOR_BASE_P (REGNO (reg2))))         \
        !          1363:        { breg = reg2; ireg = reg1; }                                   \
        !          1364:       else if (reg1 != 0 && REGNO_OK_FOR_BASE_P (REGNO (reg1)))                \
        !          1365:        { breg = reg1; ireg = reg2; }                                   \
        !          1366:       if (ireg != 0 && breg == 0 && GET_CODE (addr) == LABEL_REF)      \
        !          1367:         { int scale = 1;                                               \
        !          1368:          if (GET_CODE (ireg) == MULT)                                  \
        !          1369:            { scale = INTVAL (XEXP (ireg, 1));                          \
        !          1370:              ireg = XEXP (ireg, 0); }                                  \
        !          1371:          if (GET_CODE (ireg) == SIGN_EXTEND)                           \
        !          1372:            fprintf (FILE, "pc@(L%d-LI%d-2:B)[%s:W",                    \
        !          1373:                     CODE_LABEL_NUMBER (XEXP (addr, 0)),                \
        !          1374:                     CODE_LABEL_NUMBER (XEXP (addr, 0)),                \
        !          1375:                     reg_names[REGNO (XEXP (ireg, 0))]);                \
        !          1376:          else                                                          \
        !          1377:            fprintf (FILE, "pc@(L%d-LI%d-2:B)[%s:L",                    \
        !          1378:                     CODE_LABEL_NUMBER (XEXP (addr, 0)),                \
        !          1379:                     CODE_LABEL_NUMBER (XEXP (addr, 0)),                \
        !          1380:                     reg_names[REGNO (ireg)]);                          \
        !          1381:          fprintf (FILE, ":%c", sz[scale]);                             \
        !          1382:          putc (']', FILE);                                             \
        !          1383:          break; }                                                      \
        !          1384:       if (breg != 0 && ireg == 0 && GET_CODE (addr) == LABEL_REF)      \
        !          1385:         { fprintf (FILE, "pc@(L%d-LI%d-2:B)[%s:L:B]",                  \
        !          1386:                   CODE_LABEL_NUMBER (XEXP (addr, 0)),                  \
        !          1387:                   CODE_LABEL_NUMBER (XEXP (addr, 0)),                  \
        !          1388:                   reg_names[REGNO (breg)]);                            \
        !          1389:          break; }                                                      \
        !          1390:       if (ireg != 0 || breg != 0)                                      \
        !          1391:        { int scale = 1;                                                \
        !          1392:          if (breg == 0)                                                \
        !          1393:            abort ();                                                   \
        !          1394:          if (addr && GET_CODE (addr) == LABEL_REF) abort ();           \
        !          1395:          fprintf (FILE, "%s@", reg_names[REGNO (breg)]);               \
        !          1396:          if (addr != 0) {                                              \
        !          1397:             putc( '(', FILE );                                         \
        !          1398:            output_addr_const (FILE, addr);                             \
        !          1399:             if (ireg != 0) {                                           \
        !          1400:               if (GET_CODE(addr) == CONST_INT) {                       \
        !          1401:                 int size_of = 1, val = INTVAL(addr);                   \
        !          1402:                 if (val < -0x8000 || val >= 0x8000)                    \
        !          1403:                    size_of = 4;                                        \
        !          1404:                 else if (val < -0x80 || val >= 0x80)                   \
        !          1405:                    size_of = 2;                                                \
        !          1406:                 fprintf(FILE, ":%c", sz[size_of]);                     \
        !          1407:               }                                                                \
        !          1408:               else                                                     \
        !          1409:                 fprintf(FILE, ":L"); }                                         \
        !          1410:             putc( ')', FILE ); }                                       \
        !          1411:          if (ireg != 0) {                                              \
        !          1412:            putc ('[', FILE);                                           \
        !          1413:            if (ireg != 0 && GET_CODE (ireg) == MULT)                   \
        !          1414:              { scale = INTVAL (XEXP (ireg, 1));                        \
        !          1415:                ireg = XEXP (ireg, 0); }                                \
        !          1416:            if (ireg != 0 && GET_CODE (ireg) == SIGN_EXTEND)            \
        !          1417:              fprintf (FILE, "%s:W", reg_names[REGNO (XEXP (ireg, 0))]);        \
        !          1418:            else if (ireg != 0)                                         \
        !          1419:              fprintf (FILE, "%s:L", reg_names[REGNO (ireg)]);          \
        !          1420:            fprintf (FILE, ":%c", sz[scale]);                           \
        !          1421:            putc (']', FILE);                                           \
        !          1422:           }                                                            \
        !          1423:          break;                                                        \
        !          1424:        }                                                               \
        !          1425:       else if (reg1 != 0 && GET_CODE (addr) == LABEL_REF)              \
        !          1426:        { fprintf (FILE, "pc@(L%d-LI%d-2:B)[%s:L:B]",                   \
        !          1427:                   CODE_LABEL_NUMBER (XEXP (addr, 0)),                  \
        !          1428:                   CODE_LABEL_NUMBER (XEXP (addr, 0)),                  \
        !          1429:                   reg_names[REGNO (reg1)]);                            \
        !          1430:          break; }                                                      \
        !          1431:     default:                                                           \
        !          1432:       if (GET_CODE (addr) == CONST_INT                                 \
        !          1433:          && INTVAL (addr) < 0x8000                                     \
        !          1434:          && INTVAL (addr) >= -0x8000)                                  \
        !          1435:        fprintf (FILE, "%d:W", INTVAL (addr));                          \
        !          1436:       else                                                             \
        !          1437:         output_addr_const (FILE, addr);                                        \
        !          1438:     }}
        !          1439: 
        !          1440: /*
        !          1441: Local variables:
        !          1442: version-control: t
        !          1443: End:
        !          1444: */
        !          1445: 

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