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Annotation of gcc/config/rs6000.h, revision 1.1

1.1     ! root        1: /* Definitions of target machine for GNU compiler, for IBM RS/6000.
        !             2:    Copyright (C) 1992 Free Software Foundation, Inc.
        !             3:    Contributed by Richard Kenner ([email protected])
        !             4: 
        !             5: This file is part of GNU CC.
        !             6: 
        !             7: GNU CC is free software; you can redistribute it and/or modify
        !             8: it under the terms of the GNU General Public License as published by
        !             9: the Free Software Foundation; either version 2, or (at your option)
        !            10: any later version.
        !            11: 
        !            12: GNU CC is distributed in the hope that it will be useful,
        !            13: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            14: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            15: GNU General Public License for more details.
        !            16: 
        !            17: You should have received a copy of the GNU General Public License
        !            18: along with GNU CC; see the file COPYING.  If not, write to
        !            19: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            20: 
        !            21: 
        !            22: /* Note that some other tm.h files include this one and then override
        !            23:    many of the definitions that relate to assembler syntax.  */
        !            24: 
        !            25: 
        !            26: /* Names to predefine in the preprocessor for this target machine.  */
        !            27: 
        !            28: #define CPP_PREDEFINES "-D_IBMR2 -D_AIX"
        !            29: 
        !            30: /* Print subsidiary information on the compiler version in use.  */
        !            31: #define TARGET_VERSION ;
        !            32: 
        !            33: /* Tell the assembler to assume that all undefined names are external.  Don't
        !            34:    do this until the fixed IBM assembler is more generally available.  */
        !            35: 
        !            36: /* #define ASM_SPEC "-u" */
        !            37: 
        !            38: /* Define the options for the binder: Start text at 512, align all segments
        !            39:    to 512 bytes, and warn if there is text relocation.
        !            40: 
        !            41:    The -bhalt:4 option supposedly changes the level at which ld will abort,
        !            42:    but it also suppresses warnings about multiply defined symbols and is
        !            43:    used by the AIX cc command.  So we use it here.
        !            44: 
        !            45:    -bnodelcsect undoes a poor choice of default relating to multiply-defined
        !            46:    csects.  See AIX documentation for more information about this.  */
        !            47: 
        !            48: #define LINK_SPEC "-T512 -H512 -btextro -bhalt:4 -bnodelcsect"
        !            49: 
        !            50: /* Add -lfp_p when running with -p or -pg.  */
        !            51: #define LIB_SPEC "%{pg:-lfp_p}%{p:-lfp_p} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}"
        !            52: 
        !            53: /* gcc must do the search itself to find libgcc.a, not use -l.  */
        !            54: #define LINK_LIBGCC_SPECIAL
        !            55: 
        !            56: /* Don't turn -B into -L if the argument specifies a relative file name.  */
        !            57: #define RELATIVE_PREFIX_NOT_LINKDIR
        !            58: 
        !            59: /* Run-time compilation parameters selecting different hardware subsets.  */
        !            60: 
        !            61: /* Flag to allow putting fp constants in the TOC; can be turned off when
        !            62:    the TOC overflows.  */
        !            63: 
        !            64: #define TARGET_FP_IN_TOC  (target_flags & 1)
        !            65: 
        !            66: extern int target_flags;
        !            67: 
        !            68: /* Macro to define tables used to set the flags.
        !            69:    This is a list in braces of pairs in braces,
        !            70:    each pair being { "NAME", VALUE }
        !            71:    where VALUE is the bits to set or minus the bits to clear.
        !            72:    An empty string NAME is used to identify the default VALUE.  */
        !            73: 
        !            74: #define TARGET_SWITCHES                \
        !            75:   {{"fp-in-toc", 1},           \
        !            76:    {"no-fp-in-toc", -1},       \
        !            77:    { "", TARGET_DEFAULT}}
        !            78: 
        !            79: #define TARGET_DEFAULT 1
        !            80: 
        !            81: /* On the RS/6000, we turn on various flags if optimization is selected.  */
        !            82: 
        !            83: #define OPTIMIZATION_OPTIONS(LEVEL)    \
        !            84: {                                      \
        !            85:   if ((LEVEL) > 0)                     \
        !            86:     {                                  \
        !            87:       flag_force_mem = 1;              \
        !            88:       flag_omit_frame_pointer = 1;     \
        !            89:     }                                  \
        !            90: }
        !            91: 
        !            92: /* Define this to modify the options specified by the user.
        !            93: 
        !            94:    We turn off profiling because we don't know how to do it.  */
        !            95: 
        !            96: #define OVERRIDE_OPTIONS               \
        !            97: {                                      \
        !            98:    profile_flag = profile_block_flag = 0; \
        !            99: }
        !           100: 
        !           101: /* target machine storage layout */
        !           102: 
        !           103: /* Define this if most significant bit is lowest numbered
        !           104:    in instructions that operate on numbered bit-fields. */
        !           105: /* That is true on RS/6000. */
        !           106: #define BITS_BIG_ENDIAN 1
        !           107: 
        !           108: /* Define this if most significant byte of a word is the lowest numbered.  */
        !           109: /* That is true on RS/6000.  */
        !           110: #define BYTES_BIG_ENDIAN 1
        !           111: 
        !           112: /* Define this if most significant word of a multiword number is lowest
        !           113:    numbered. 
        !           114: 
        !           115:    For RS/6000 we can decide arbitrarily since there are no machine
        !           116:    instructions for them.  Might as well be consistent with bits and bytes. */
        !           117: #define WORDS_BIG_ENDIAN 1
        !           118: 
        !           119: /* number of bits in an addressible storage unit */
        !           120: #define BITS_PER_UNIT 8
        !           121: 
        !           122: /* Width in bits of a "word", which is the contents of a machine register.
        !           123:    Note that this is not necessarily the width of data type `int';
        !           124:    if using 16-bit ints on a 68000, this would still be 32.
        !           125:    But on a machine with 16-bit registers, this would be 16.  */
        !           126: #define BITS_PER_WORD 32
        !           127: 
        !           128: /* Width of a word, in units (bytes).  */
        !           129: #define UNITS_PER_WORD 4
        !           130: 
        !           131: /* Type used for wchar_t, as a string used in a declaration.  */
        !           132: #define WCHAR_TYPE "short unsigned int"
        !           133: 
        !           134: /* Width of wchar_t in bits.  */
        !           135: #define WCHAR_TYPE_SIZE 16
        !           136: 
        !           137: /* Width in bits of a pointer.
        !           138:    See also the macro `Pmode' defined below.  */
        !           139: #define POINTER_SIZE 32
        !           140: 
        !           141: /* Allocation boundary (in *bits*) for storing arguments in argument list.  */
        !           142: #define PARM_BOUNDARY 32
        !           143: 
        !           144: /* Boundary (in *bits*) on which stack pointer should be aligned.  */
        !           145: #define STACK_BOUNDARY 64
        !           146: 
        !           147: /* Allocation boundary (in *bits*) for the code of a function.  */
        !           148: #define FUNCTION_BOUNDARY 32
        !           149: 
        !           150: /* No data type wants to be aligned rounder than this.  */
        !           151: #define BIGGEST_ALIGNMENT 32
        !           152: 
        !           153: /* Alignment of field after `int : 0' in a structure.  */
        !           154: #define EMPTY_FIELD_BOUNDARY 32
        !           155: 
        !           156: /* Every structure's size must be a multiple of this.  */
        !           157: #define STRUCTURE_SIZE_BOUNDARY 8
        !           158: 
        !           159: /* A bitfield declared as `int' forces `int' alignment for the struct.  */
        !           160: #define PCC_BITFIELD_TYPE_MATTERS 1
        !           161: 
        !           162: /* Make strings word-aligned so strcpy from constants will be faster.  */
        !           163: #define CONSTANT_ALIGNMENT(EXP, ALIGN)  \
        !           164:   (TREE_CODE (EXP) == STRING_CST       \
        !           165:    && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
        !           166: 
        !           167: /* Make arrays of chars word-aligned for the same reasons.  */
        !           168: #define DATA_ALIGNMENT(TYPE, ALIGN)            \
        !           169:   (TREE_CODE (TYPE) == ARRAY_TYPE              \
        !           170:    && TYPE_MODE (TREE_TYPE (TYPE)) == QImode   \
        !           171:    && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
        !           172: 
        !           173: /* Define this if move instructions will actually fail to work
        !           174:    when given unaligned data.  */
        !           175: /* #define STRICT_ALIGNMENT */
        !           176: 
        !           177: /* Standard register usage.  */
        !           178: 
        !           179: /* Number of actual hardware registers.
        !           180:    The hardware registers are assigned numbers for the compiler
        !           181:    from 0 to just below FIRST_PSEUDO_REGISTER.
        !           182:    All registers that the compiler knows about must be given numbers,
        !           183:    even those that are not normally considered general registers.
        !           184: 
        !           185:    RS/6000 has 32 fixed-point registers, 32 floating-point registers,
        !           186:    an MQ register, a count register, a link register, and 8 condition
        !           187:    register fields, which we view here as separate registers.
        !           188: 
        !           189:    In addition, the difference between the frame and argument pointers is
        !           190:    a function of the number of registers saved, so we need to have a
        !           191:    register for AP that will later be eliminated in favor of SP or FP.
        !           192:    This is a normal register, but it is fixed.  */
        !           193: 
        !           194: #define FIRST_PSEUDO_REGISTER 76
        !           195: 
        !           196: /* 1 for registers that have pervasive standard uses
        !           197:    and are not available for the register allocator.
        !           198: 
        !           199:    On RS/6000, r1 is used for the stack and r2 is used as the TOC pointer.  
        !           200: 
        !           201:    cr5 is not supposed to be used.  */
        !           202: 
        !           203: #define FIXED_REGISTERS  \
        !           204:   {0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           205:    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           206:    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           207:    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           208:    0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0}
        !           209: 
        !           210: /* 1 for registers not available across function calls.
        !           211:    These must include the FIXED_REGISTERS and also any
        !           212:    registers that can be used without being saved.
        !           213:    The latter must include the registers where values are returned
        !           214:    and the register where structure-value addresses are passed.
        !           215:    Aside from that, you can include as many other registers as you like.  */
        !           216: 
        !           217: #define CALL_USED_REGISTERS  \
        !           218:   {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, \
        !           219:    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           220:    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, \
        !           221:    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           222:    1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1}
        !           223: 
        !           224: /* List the order in which to allocate registers.  Each register must be
        !           225:    listed once, even those in FIXED_REGISTERS.
        !           226: 
        !           227:    We allocate in the following order:
        !           228:        fp0             (not saved or used for anything)
        !           229:        fp13 - fp2      (not saved; incoming fp arg registers)
        !           230:        fp1             (not saved; return value)
        !           231:        fp31 - fp14     (saved; order given to save least number)
        !           232:        cr1, cr6, cr7   (not saved or special)
        !           233:        cr0             (not saved, but used for arithmetic operations)
        !           234:        cr2, cr3, cr4   (saved)
        !           235:         r0             (not saved; cannot be base reg)
        !           236:        r9              (not saved; best for TImode)
        !           237:        r11, r10, r8-r4 (not saved; highest used first to make less conflict)
        !           238:        r3              (not saved; return value register)
        !           239:        r31 - r13       (saved; order given to save least number)
        !           240:        r12             (not saved; if used for DImode or DFmode would use r13)
        !           241:        mq              (not saved; best to use it if we can)
        !           242:        ctr             (not saved; when we have the choice ctr is better)
        !           243:        lr              (saved)
        !           244:         cr5, r1, r2, ap        (fixed)  */
        !           245: 
        !           246: #define REG_ALLOC_ORDER                                        \
        !           247:   {32,                                                         \
        !           248:    45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34,     \
        !           249:    33,                                                 \
        !           250:    63, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, \
        !           251:    50, 49, 48, 47, 46,                                         \
        !           252:    69, 74, 75, 68, 70, 71, 72,                         \
        !           253:    0,                                                  \
        !           254:    9, 11, 10, 8, 7, 6, 5, 4,                           \
        !           255:    3,                                                  \
        !           256:    31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, \
        !           257:    18, 17, 16, 15, 14, 13, 12,                         \
        !           258:    64, 66, 65,                                                 \
        !           259:    73, 1, 2, 67}
        !           260: 
        !           261: /* True if register is floating-point.  */
        !           262: #define FP_REGNO_P(N) ((N) >= 32 && (N) <= 63)
        !           263: 
        !           264: /* True if register is a condition register.  */
        !           265: #define CR_REGNO_P(N) ((N) >= 68 && (N) <= 75)
        !           266: 
        !           267: /* True if register is an integer register.  */
        !           268: #define INT_REGNO_P(N) ((N) <= 31 || (N) == 67)
        !           269: 
        !           270: /* Return number of consecutive hard regs needed starting at reg REGNO
        !           271:    to hold something of mode MODE.
        !           272:    This is ordinarily the length in words of a value of mode MODE
        !           273:    but can be less for certain modes in special long registers.
        !           274: 
        !           275:    On RS/6000, ordinary registers hold 32 bits worth;
        !           276:    a single floating point register holds 64 bits worth.  */
        !           277: 
        !           278: #define HARD_REGNO_NREGS(REGNO, MODE)   \
        !           279:   (FP_REGNO_P (REGNO)                  \
        !           280:    ? ((GET_MODE_SIZE (MODE) + 2 * UNITS_PER_WORD - 1) / (2 * UNITS_PER_WORD)) \
        !           281:    : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
        !           282: 
        !           283: /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
        !           284:    On RS/6000, the cpu registers can hold any mode but the float registers
        !           285:    can hold only floating modes and CR register can only hold CC modes.  We
        !           286:    cannot put DImode or TImode anywhere except general register and they
        !           287:    must be able to fit within the register set.  */
        !           288: 
        !           289: #define HARD_REGNO_MODE_OK(REGNO, MODE) \
        !           290:   (FP_REGNO_P (REGNO) ? GET_MODE_CLASS (MODE) == MODE_FLOAT    \
        !           291:    : CR_REGNO_P (REGNO) ? GET_MODE_CLASS (MODE) == MODE_CC     \
        !           292:    : ! INT_REGNO_P (REGNO) ? GET_MODE_CLASS (MODE) == MODE_INT \
        !           293:    : 1)
        !           294: 
        !           295: /* Value is 1 if it is a good idea to tie two pseudo registers
        !           296:    when one has mode MODE1 and one has mode MODE2.
        !           297:    If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
        !           298:    for any hard reg, then this must be 0 for correct output.  */
        !           299: #define MODES_TIEABLE_P(MODE1, MODE2) \
        !           300:   (GET_MODE_CLASS (MODE1) == MODE_FLOAT                \
        !           301:    ? GET_MODE_CLASS (MODE2) == MODE_FLOAT      \
        !           302:    : GET_MODE_CLASS (MODE2) == MODE_FLOAT      \
        !           303:    ? GET_MODE_CLASS (MODE1) == MODE_FLOAT      \
        !           304:    : GET_MODE_CLASS (MODE1) == MODE_CC         \
        !           305:    ? GET_MODE_CLASS (MODE2) == MODE_CC         \
        !           306:    : GET_MODE_CLASS (MODE2) == MODE_CC         \
        !           307:    ? GET_MODE_CLASS (MODE1) == MODE_CC         \
        !           308:    : 1)
        !           309: 
        !           310: /* A C expression returning the cost of moving data from a register of class
        !           311:    CLASS1 to one of CLASS2.
        !           312: 
        !           313:    On the RS/6000, copying between floating-point and fixed-point
        !           314:    registers is expensive.  */
        !           315: 
        !           316: #define REGISTER_MOVE_COST(CLASS1, CLASS2)                     \
        !           317:   ((CLASS1) == FLOAT_REGS && (CLASS2) == FLOAT_REGS ? 2                \
        !           318:    : (CLASS1) == FLOAT_REGS && (CLASS2) != FLOAT_REGS ? 10     \
        !           319:    : (CLASS1) != FLOAT_REGS && (CLASS2) == FLOAT_REGS ? 10     \
        !           320:    : 2)
        !           321: 
        !           322: /* A C expressions returning the cost of moving data of MODE from a register to
        !           323:    or from memory.
        !           324: 
        !           325:    On the RS/6000, bump this up a bit.  */
        !           326: 
        !           327: #define MEMORY_MOVE_COST(MODE)  4
        !           328: 
        !           329: /* Specify the cost of a branch insn; roughly the number of extra insns that
        !           330:    should be added to avoid a branch.
        !           331: 
        !           332:    Set this to 2 on the RS/6000 since that is roughly the average cost of an
        !           333:    unscheduled conditional branch.  */
        !           334: 
        !           335: #define BRANCH_COST 2
        !           336: 
        !           337: /* Specify the registers used for certain standard purposes.
        !           338:    The values of these macros are register numbers.  */
        !           339: 
        !           340: /* RS/6000 pc isn't overloaded on a register that the compiler knows about.  */
        !           341: /* #define PC_REGNUM  */
        !           342: 
        !           343: /* Register to use for pushing function arguments.  */
        !           344: #define STACK_POINTER_REGNUM 1
        !           345: 
        !           346: /* Base register for access to local variables of the function.  */
        !           347: #define FRAME_POINTER_REGNUM 31
        !           348: 
        !           349: /* Value should be nonzero if functions must have frame pointers.
        !           350:    Zero means the frame pointer need not be set up (and parms
        !           351:    may be accessed via the stack pointer) in functions that seem suitable.
        !           352:    This is computed in `reload', in reload1.c.  */
        !           353: #define FRAME_POINTER_REQUIRED 0
        !           354: 
        !           355: /* Base register for access to arguments of the function.  */
        !           356: #define ARG_POINTER_REGNUM 67
        !           357: 
        !           358: /* Place to put static chain when calling a function that requires it.  */
        !           359: #define STATIC_CHAIN_REGNUM 11
        !           360: 
        !           361: /* Place that structure value return address is placed.
        !           362: 
        !           363:    On the RS/6000, it is passed as an extra parameter.  */
        !           364: #define STRUCT_VALUE   0
        !           365: 
        !           366: /* Define the classes of registers for register constraints in the
        !           367:    machine description.  Also define ranges of constants.
        !           368: 
        !           369:    One of the classes must always be named ALL_REGS and include all hard regs.
        !           370:    If there is more than one class, another class must be named NO_REGS
        !           371:    and contain no registers.
        !           372: 
        !           373:    The name GENERAL_REGS must be the name of a class (or an alias for
        !           374:    another name such as ALL_REGS).  This is the class of registers
        !           375:    that is allowed by "g" or "r" in a register constraint.
        !           376:    Also, registers outside this class are allocated only when
        !           377:    instructions express preferences for them.
        !           378: 
        !           379:    The classes must be numbered in nondecreasing order; that is,
        !           380:    a larger-numbered class must never be contained completely
        !           381:    in a smaller-numbered class.
        !           382: 
        !           383:    For any two classes, it is very desirable that there be another
        !           384:    class that represents their union.  */
        !           385:    
        !           386: /* The RS/6000 has three types of registers, fixed-point, floating-point,
        !           387:    and condition registers, plus three special registers, MQ, CTR, and the
        !           388:    link register.
        !           389: 
        !           390:    However, r0 is special in that it cannot be used as a base register.
        !           391:    So make a class for registers valid as base registers.
        !           392: 
        !           393:    Also, cr0 is the only condition code register that can be used in
        !           394:    arithmetic insns, so make a separate class for it. */
        !           395: 
        !           396: enum reg_class { NO_REGS, BASE_REGS, GENERAL_REGS, FLOAT_REGS,
        !           397:   NON_SPECIAL_REGS, MQ_REGS, LINK_REGS, CTR_REGS, LINK_OR_CTR_REGS,
        !           398:   SPECIAL_REGS, CR0_REGS, CR_REGS, ALL_REGS, LIM_REG_CLASSES };
        !           399: 
        !           400: #define N_REG_CLASSES (int) LIM_REG_CLASSES
        !           401: 
        !           402: /* Give names of register classes as strings for dump file.   */
        !           403: 
        !           404: #define REG_CLASS_NAMES                                                \
        !           405:   { "NO_REGS", "BASE_REGS", "GENERAL_REGS", "FLOAT_REGS",      \
        !           406:     "NON_SPECIAL_REGS", "MQ_REGS", "LINK_REGS", "CTR_REGS",    \
        !           407:     "LINK_OR_CTR_REGS", "SPECIAL_REGS", "CR0_REGS", "CR_REGS", "ALL_REGS" }
        !           408: 
        !           409: /* Define which registers fit in which classes.
        !           410:    This is an initializer for a vector of HARD_REG_SET
        !           411:    of length N_REG_CLASSES.  */
        !           412: 
        !           413: #define REG_CLASS_CONTENTS                             \
        !           414:   { {0, 0, 0}, {0xfffffffe, 0, 8}, {~0, 0, 8},         \
        !           415:     {0, ~0, 0}, {~0, ~0, 0}, {0, 0, 1}, {0, 0, 2},     \
        !           416:     {0, 0, 4}, {0, 0, 6}, {0, 0, 7}, {0, 0, 16},       \
        !           417:     {0, 0, 0xff0}, {~0, ~0, 0xfff5} }
        !           418: 
        !           419: /* The same information, inverted:
        !           420:    Return the class number of the smallest class containing
        !           421:    reg number REGNO.  This could be a conditional expression
        !           422:    or could index an array.  */
        !           423: 
        !           424: #define REGNO_REG_CLASS(REGNO) \
        !           425:  ((REGNO) == 0 ? GENERAL_REGS  \
        !           426:   : (REGNO) < 32 ? BASE_REGS   \
        !           427:   : FP_REGNO_P (REGNO) ? FLOAT_REGS \
        !           428:   : (REGNO) == 68 ? CR0_REGS   \
        !           429:   : CR_REGNO_P (REGNO) ? CR_REGS \
        !           430:   : (REGNO) == 64 ? MQ_REGS    \
        !           431:   : (REGNO) == 65 ? LINK_REGS  \
        !           432:   : (REGNO) == 66 ? CTR_REGS   \
        !           433:   : (REGNO) == 67 ? BASE_REGS  \
        !           434:   : NO_REGS)
        !           435: 
        !           436: /* The class value for index registers, and the one for base regs.  */
        !           437: #define INDEX_REG_CLASS GENERAL_REGS
        !           438: #define BASE_REG_CLASS BASE_REGS
        !           439: 
        !           440: /* Get reg_class from a letter such as appears in the machine description.  */
        !           441: 
        !           442: #define REG_CLASS_FROM_LETTER(C) \
        !           443:   ((C) == 'f' ? FLOAT_REGS     \
        !           444:    : (C) == 'b' ? BASE_REGS    \
        !           445:    : (C) == 'h' ? SPECIAL_REGS \
        !           446:    : (C) == 'q' ? MQ_REGS      \
        !           447:    : (C) == 'c' ? CTR_REGS     \
        !           448:    : (C) == 'l' ? LINK_REGS    \
        !           449:    : (C) == 'x' ? CR0_REGS     \
        !           450:    : (C) == 'y' ? CR_REGS      \
        !           451:    : NO_REGS)
        !           452: 
        !           453: /* The letters I, J, K, L, M, N, and P in a register constraint string
        !           454:    can be used to stand for particular ranges of immediate operands.
        !           455:    This macro defines what the ranges are.
        !           456:    C is the letter, and VALUE is a constant value.
        !           457:    Return 1 if VALUE is in the range specified by C.
        !           458: 
        !           459:    `I' is signed 16-bit constants 
        !           460:    `J' is a constant with only the high-order 16 bits non-zero
        !           461:    `K' is a constant with only the low-order 16 bits non-zero
        !           462:    `L' is a constant that can be placed into a mask operand
        !           463:    `M' is a constant that is greater than 31
        !           464:    `N' is a constant that is an exact power of two
        !           465:    `O' is the constant zero
        !           466:    `P' is a constant whose negation is a signed 16-bit constant */
        !           467: 
        !           468: #define CONST_OK_FOR_LETTER_P(VALUE, C)                                \
        !           469:    ( (C) == 'I' ? (unsigned) ((VALUE) + 0x8000) < 0x10000      \
        !           470:    : (C) == 'J' ? ((VALUE) & 0xffff) == 0                      \
        !           471:    : (C) == 'K' ? ((VALUE) & 0xffff0000) == 0                  \
        !           472:    : (C) == 'L' ? mask_constant (VALUE)                                \
        !           473:    : (C) == 'M' ? (VALUE) > 31                                 \
        !           474:    : (C) == 'N' ? exact_log2 (VALUE) >= 0                      \
        !           475:    : (C) == 'O' ? (VALUE) == 0                                 \
        !           476:    : (C) == 'P' ? (unsigned) ((- (VALUE)) + 0x8000) < 0x1000   \
        !           477:    : 0)
        !           478: 
        !           479: /* Similar, but for floating constants, and defining letters G and H.
        !           480:    Here VALUE is the CONST_DOUBLE rtx itself.
        !           481: 
        !           482:    We flag for special constants when we can copy the constant into
        !           483:    a general register in two insns for DF and one insn for SF.  */
        !           484: 
        !           485: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)  \
        !           486:   ((C) == 'G' ? easy_fp_constant (VALUE, GET_MODE (VALUE)) : 0)
        !           487: 
        !           488: /* Optional extra constraints for this machine.
        !           489: 
        !           490:    For the RS/6000, `Q' means that this is a memory operand that is just
        !           491:    an offset from a register.  */
        !           492: 
        !           493: #define EXTRA_CONSTRAINT(OP, C)                                \
        !           494:   ((C) == 'Q' ? indirect_operand (OP, VOIDmode) : 0)
        !           495: 
        !           496: /* Given an rtx X being reloaded into a reg required to be
        !           497:    in class CLASS, return the class of reg to actually use.
        !           498:    In general this is just CLASS; but on some machines
        !           499:    in some cases it is preferable to use a more restrictive class. 
        !           500: 
        !           501:    On the RS/6000, we have to return NO_REGS when we want to reload a
        !           502:    floating-point CONST_DOUBLE to force it to be copied to memory.  */
        !           503: 
        !           504: #define PREFERRED_RELOAD_CLASS(X,CLASS)        \
        !           505:   ((GET_CODE (X) == CONST_DOUBLE                       \
        !           506:     && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT)    \
        !           507:    ? NO_REGS : (CLASS))
        !           508:    
        !           509: /* Return the register class of a scratch register needed to copy IN into
        !           510:    or out of a register in CLASS in MODE.  If it can be done directly,
        !           511:    NO_REGS is returned.  */
        !           512: 
        !           513: #define SECONDARY_RELOAD_CLASS(CLASS,MODE,IN) \
        !           514:   secondary_reload_class (CLASS, MODE, IN)
        !           515: 
        !           516: /* Return the maximum number of consecutive registers
        !           517:    needed to represent mode MODE in a register of class CLASS.
        !           518: 
        !           519:    On RS/6000, this is the size of MODE in words,
        !           520:    except in the FP regs, where a single reg is enough for two words.  */
        !           521: #define CLASS_MAX_NREGS(CLASS, MODE)   \
        !           522:  ((CLASS) == FLOAT_REGS                        \
        !           523:   ? ((GET_MODE_SIZE (MODE) + 2 * UNITS_PER_WORD - 1) / (2 * UNITS_PER_WORD)) \
        !           524:   : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
        !           525: 
        !           526: /* Stack layout; function entry, exit and calling.  */
        !           527: 
        !           528: /* Define this if pushing a word on the stack
        !           529:    makes the stack pointer a smaller address.  */
        !           530: #define STACK_GROWS_DOWNWARD
        !           531: 
        !           532: /* Define this if the nominal address of the stack frame
        !           533:    is at the high-address end of the local variables;
        !           534:    that is, each additional local variable allocated
        !           535:    goes at a more negative offset in the frame.
        !           536: 
        !           537:    On the RS/6000, we grow upwards, from the area after the outgoing
        !           538:    arguments.  */
        !           539: /* #define FRAME_GROWS_DOWNWARD */
        !           540: 
        !           541: /* Offset within stack frame to start allocating local variables at.
        !           542:    If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
        !           543:    first local allocated.  Otherwise, it is the offset to the BEGINNING
        !           544:    of the first local allocated. 
        !           545: 
        !           546:    On the RS/6000, the frame pointer is the same as the stack pointer,
        !           547:    except for dynamic allocations.  So we start after the fixed area and
        !           548:    outgoing parameter area.  */
        !           549: 
        !           550: #define STARTING_FRAME_OFFSET (current_function_outgoing_args_size + 24)
        !           551: 
        !           552: /* If we generate an insn to push BYTES bytes,
        !           553:    this says how many the stack pointer really advances by.
        !           554:    On RS/6000, don't define this because there are no push insns.  */
        !           555: /*  #define PUSH_ROUNDING(BYTES) */
        !           556: 
        !           557: /* Offset of first parameter from the argument pointer register value.
        !           558:    On the RS/6000, we define the argument pointer to the start of the fixed
        !           559:    area.  */
        !           560: #define FIRST_PARM_OFFSET(FNDECL) 24
        !           561: 
        !           562: /* Define this if stack space is still allocated for a parameter passed
        !           563:    in a register.  The value is the number of bytes allocated to this
        !           564:    area.  */
        !           565: #define REG_PARM_STACK_SPACE(FNDECL)   32
        !           566: 
        !           567: /* Define this if the above stack space is to be considered part of the
        !           568:    space allocated by the caller.  */
        !           569: #define OUTGOING_REG_PARM_STACK_SPACE
        !           570: 
        !           571: /* This is the difference between the logical top of stack and the actual sp.
        !           572: 
        !           573:    For the RS/6000, sp points past the fixed area. */
        !           574: #define STACK_POINTER_OFFSET 24
        !           575: 
        !           576: /* Define this if the maximum size of all the outgoing args is to be
        !           577:    accumulated and pushed during the prologue.  The amount can be
        !           578:    found in the variable current_function_outgoing_args_size.  */
        !           579: #define ACCUMULATE_OUTGOING_ARGS
        !           580: 
        !           581: /* Value is the number of bytes of arguments automatically
        !           582:    popped when returning from a subroutine call.
        !           583:    FUNTYPE is the data type of the function (as a tree),
        !           584:    or for a library call it is an identifier node for the subroutine name.
        !           585:    SIZE is the number of bytes of arguments passed on the stack.  */
        !           586: 
        !           587: #define RETURN_POPS_ARGS(FUNTYPE,SIZE) 0
        !           588: 
        !           589: /* Define how to find the value returned by a function.
        !           590:    VALTYPE is the data type of the value (as a tree).
        !           591:    If the precise function being called is known, FUNC is its FUNCTION_DECL;
        !           592:    otherwise, FUNC is 0.
        !           593: 
        !           594:    On RS/6000 an integer value is in r3 and a floating-point value is in 
        !           595:    fp1.  */
        !           596: 
        !           597: #define FUNCTION_VALUE(VALTYPE, FUNC)  \
        !           598:   gen_rtx (REG, TYPE_MODE (VALTYPE),   \
        !           599:           TREE_CODE (VALTYPE) == REAL_TYPE ? 33 : 3)
        !           600: 
        !           601: /* Define how to find the value returned by a library function
        !           602:    assuming the value has mode MODE.  */
        !           603: 
        !           604: #define LIBCALL_VALUE(MODE)            \
        !           605:   gen_rtx (REG, MODE, GET_MODE_CLASS (MODE) == MODE_FLOAT ? 33 : 3)
        !           606: 
        !           607: /* The definition of this macro implies that there are cases where
        !           608:    a scalar value cannot be returned in registers.
        !           609: 
        !           610:    For the RS/6000, any structure or union type is returned in memory.  */
        !           611: 
        !           612: #define RETURN_IN_MEMORY(TYPE) \
        !           613:   (TREE_CODE (TYPE) == RECORD_TYPE || TREE_CODE (TYPE) == UNION_TYPE)
        !           614: 
        !           615: /* 1 if N is a possible register number for a function value
        !           616:    as seen by the caller.
        !           617: 
        !           618:    On RS/6000, this is r3 and fp1.  */
        !           619: 
        !           620: #define FUNCTION_VALUE_REGNO_P(N)  ((N) == 3 || ((N) == 33))
        !           621: 
        !           622: /* 1 if N is a possible register number for function argument passing.
        !           623:    On RS/6000, these are r3-r10 and fp1-fp13.  */
        !           624: 
        !           625: #define FUNCTION_ARG_REGNO_P(N)        \
        !           626:   (((N) <= 10 && (N) >= 3) || ((N) >= 33 && (N) <= 45))
        !           627: 
        !           628: /* Define a data type for recording info about an argument list
        !           629:    during the scan of that argument list.  This data type should
        !           630:    hold all necessary information about the function itself
        !           631:    and about the args processed so far, enough to enable macros
        !           632:    such as FUNCTION_ARG to determine where the next arg should go.
        !           633: 
        !           634:    On the RS/6000, this is a structure.  The first element is the number of
        !           635:    total argument words, the second is used to store the next
        !           636:    floating-point register number, and the third says how many more args we
        !           637:    have prototype types for.  */
        !           638: 
        !           639: struct rs6000_args {int words, fregno, nargs_prototype; };
        !           640: #define CUMULATIVE_ARGS struct rs6000_args
        !           641: 
        !           642: /* Define intermediate macro to compute the size (in registers) of an argument
        !           643:    for the RS/6000.  */
        !           644: 
        !           645: #define RS6000_ARG_SIZE(MODE, TYPE, NAMED)                             \
        !           646: (! (NAMED) ? 0                                                         \
        !           647:  : (MODE) != BLKmode                                                   \
        !           648:  ? (GET_MODE_SIZE (MODE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD      \
        !           649:  : (int_size_in_bytes (TYPE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD)
        !           650: 
        !           651: /* Initialize a variable CUM of type CUMULATIVE_ARGS
        !           652:    for a call to a function whose data type is FNTYPE.
        !           653:    For a library call, FNTYPE is 0.  */
        !           654: 
        !           655: #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME)       \
        !           656:   (CUM).words = 0,                             \
        !           657:   (CUM).fregno = 33,                           \
        !           658:   (CUM).nargs_prototype = (FNTYPE && TYPE_ARG_TYPES (FNTYPE)           \
        !           659:                           ? (list_length (TYPE_ARG_TYPES (FNTYPE)) - 1 \
        !           660:                              + (TYPE_MODE (TREE_TYPE (FNTYPE)) == BLKmode \
        !           661:                                 || RETURN_IN_MEMORY (TREE_TYPE (FNTYPE)))) \
        !           662:                           : 0)
        !           663: 
        !           664: /* Similar, but when scanning the definition of a procedure.  We always
        !           665:    set NARGS_PROTOTYPE large so we never return an EXPR_LIST.  */
        !           666: 
        !           667: #define INIT_CUMULATIVE_INCOMING_ARGS(CUM,FNTYPE,IGNORE) \
        !           668:   (CUM).words = 0,                             \
        !           669:   (CUM).fregno = 33,                           \
        !           670:   (CUM).nargs_prototype = 1000
        !           671: 
        !           672: /* Update the data in CUM to advance over an argument
        !           673:    of mode MODE and data type TYPE.
        !           674:    (TYPE is null for libcalls where that information may not be available.)  */
        !           675: 
        !           676: #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)   \
        !           677: { (CUM).nargs_prototype--;                             \
        !           678:   if (NAMED)                                           \
        !           679:     {                                                  \
        !           680:       (CUM).words += RS6000_ARG_SIZE (MODE, TYPE, NAMED); \
        !           681:       if (GET_MODE_CLASS (MODE) == MODE_FLOAT)         \
        !           682:        (CUM).fregno++;                                 \
        !           683:     }                                                  \
        !           684: }
        !           685: 
        !           686: /* Non-zero if we can use a floating-point register to pass this arg.  */
        !           687: #define USE_FP_FOR_ARG_P(CUM,MODE,TYPE)        \
        !           688:   (GET_MODE_CLASS (MODE) == MODE_FLOAT && (CUM).fregno < 46)
        !           689: 
        !           690: /* Determine where to put an argument to a function.
        !           691:    Value is zero to push the argument on the stack,
        !           692:    or a hard register in which to store the argument.
        !           693: 
        !           694:    MODE is the argument's machine mode.
        !           695:    TYPE is the data type of the argument (as a tree).
        !           696:     This is null for libcalls where that information may
        !           697:     not be available.
        !           698:    CUM is a variable of type CUMULATIVE_ARGS which gives info about
        !           699:     the preceding args and about the function being called.
        !           700:    NAMED is nonzero if this argument is a named parameter
        !           701:     (otherwise it is an extra parameter matching an ellipsis).
        !           702: 
        !           703:    On RS/6000 the first eight words of non-FP are normally in registers
        !           704:    and the rest are pushed.  The first 13 FP args are in registers.
        !           705: 
        !           706:    If this is floating-point and no prototype is specified, we use
        !           707:    both an FP and integer register (or possibly FP reg and stack).  */
        !           708: 
        !           709: #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED)                           \
        !           710:   (! (NAMED) ? 0                                                       \
        !           711:   : USE_FP_FOR_ARG_P (CUM, MODE, TYPE)                                 \
        !           712:    ? ((CUM).nargs_prototype > 0                                                \
        !           713:       ? gen_rtx (REG, MODE, (CUM).fregno)                              \
        !           714:       : ((CUM).words < 8                                               \
        !           715:         ? gen_rtx (EXPR_LIST, VOIDmode,                                \
        !           716:                    gen_rtx (REG, (MODE), 3 + (CUM).words),             \
        !           717:                    gen_rtx (REG, (MODE), (CUM).fregno))                \
        !           718:         : gen_rtx (EXPR_LIST, VOIDmode, 0,                             \
        !           719:                    gen_rtx (REG, (MODE), (CUM).fregno))))              \
        !           720:    : (CUM).words < 8 ? gen_rtx(REG, (MODE), 3 + (CUM).words) : 0)
        !           721: 
        !           722: /* For an arg passed partly in registers and partly in memory,
        !           723:    this is the number of registers used.
        !           724:    For args passed entirely in registers or entirely in memory, zero.  */
        !           725: 
        !           726: #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED)             \
        !           727:   (! (NAMED) ? 0                                                       \
        !           728:    : USE_FP_FOR_ARG_P (CUM, MODE, TYPE) && (CUM).nargs_prototype >= 0 ? 0 \
        !           729:    : (((CUM).words < 8                                                 \
        !           730:        && 8 < ((CUM).words + RS6000_ARG_SIZE (MODE, TYPE, NAMED)))     \
        !           731:       ? 8 - (CUM).words : 0))
        !           732: 
        !           733: /* Perform any needed actions needed for a function that is receiving a
        !           734:    variable number of arguments. 
        !           735: 
        !           736:    CUM is as above.
        !           737: 
        !           738:    MODE and TYPE are the mode and type of the current parameter.
        !           739: 
        !           740:    PRETEND_SIZE is a variable that should be set to the amount of stack
        !           741:    that must be pushed by the prolog to pretend that our caller pushed
        !           742:    it.
        !           743: 
        !           744:    Normally, this macro will push all remaining incoming registers on the
        !           745:    stack and set PRETEND_SIZE to the length of the registers pushed.  */
        !           746: 
        !           747: #define SETUP_INCOMING_VARARGS(CUM,MODE,TYPE,PRETEND_SIZE,NO_RTL)      \
        !           748: { if ((CUM).words < 8)                                                 \
        !           749:     {                                                                  \
        !           750:       int first_reg_offset = (CUM).words;                              \
        !           751:                                                                        \
        !           752:       if (MUST_PASS_IN_STACK (MODE, TYPE))                             \
        !           753:        first_reg_offset += RS6000_ARG_SIZE (TYPE_MODE (TYPE), TYPE, 1); \
        !           754:                                                                        \
        !           755:       if (first_reg_offset > 8)                                                \
        !           756:        first_reg_offset = 8;                                           \
        !           757:                                                                        \
        !           758:       if (! (NO_RTL) && first_reg_offset != 8)                         \
        !           759:        move_block_from_reg                                             \
        !           760:          (3 + first_reg_offset,                                        \
        !           761:           gen_rtx (MEM, BLKmode,                                       \
        !           762:                    plus_constant (virtual_incoming_args_rtx,           \
        !           763:                                   first_reg_offset * 4)),              \
        !           764:           8 - first_reg_offset);                                       \
        !           765:       PRETEND_SIZE = (8 - first_reg_offset) * UNITS_PER_WORD;          \
        !           766:     }                                                                  \
        !           767: }
        !           768: 
        !           769: /* This macro generates the assembly code for function entry.
        !           770:    FILE is a stdio stream to output the code to.
        !           771:    SIZE is an int: how many units of temporary storage to allocate.
        !           772:    Refer to the array `regs_ever_live' to determine which registers
        !           773:    to save; `regs_ever_live[I]' is nonzero if register number I
        !           774:    is ever used in the function.  This macro is responsible for
        !           775:    knowing which registers should not be saved even if used.  */
        !           776: 
        !           777: #define FUNCTION_PROLOGUE(FILE, SIZE) output_prolog (FILE, SIZE)
        !           778: 
        !           779: /* Output assembler code to FILE to increment profiler label # LABELNO
        !           780:    for profiling a function entry.
        !           781: 
        !           782:    I have no real idea what r3 should point to here.  */
        !           783: 
        !           784: #define FUNCTION_PROFILER(FILE, LABELNO)       \
        !           785:   fprintf(FILE, "\tbl mcount\n");
        !           786: 
        !           787: /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
        !           788:    the stack pointer does not matter. No definition is equivalent to
        !           789:    always zero.
        !           790: 
        !           791:    On the RS/6000, this is non-zero because we can restore the stack from
        !           792:    its backpointer, which we maintain.  */
        !           793: #define EXIT_IGNORE_STACK      1
        !           794: 
        !           795: /* This macro generates the assembly code for function exit,
        !           796:    on machines that need it.  If FUNCTION_EPILOGUE is not defined
        !           797:    then individual return instructions are generated for each
        !           798:    return statement.  Args are same as for FUNCTION_PROLOGUE.
        !           799: 
        !           800:    The function epilogue should not depend on the current stack pointer!
        !           801:    It should use the frame pointer only.  This is mandatory because
        !           802:    of alloca; we also take advantage of it to omit stack adjustments
        !           803:    before returning.  */
        !           804: 
        !           805: #define FUNCTION_EPILOGUE(FILE, SIZE) output_epilog (FILE, SIZE)
        !           806: 
        !           807: /* Output assembler code for a block containing the constant parts
        !           808:    of a trampoline, leaving space for the variable parts.
        !           809: 
        !           810:    The trampoline should set the static chain pointer to value placed
        !           811:    into the trampoline and should branch to the specified routine.
        !           812: 
        !           813:    On the RS/6000, this is not code at all, but merely a data area,
        !           814:    since that is the way all functions are called.  The first word is
        !           815:    the address of the function, the second word is the TOC pointer (r2),
        !           816:    and the third word is the static chain value.  */
        !           817: 
        !           818: #define TRAMPOLINE_TEMPLATE(FILE) { fprintf (FILE, "\t.long 0, 0, 0\n"); }
        !           819: 
        !           820: /* Length in units of the trampoline for entering a nested function.  */
        !           821: 
        !           822: #define TRAMPOLINE_SIZE    12
        !           823: 
        !           824: /* Emit RTL insns to initialize the variable parts of a trampoline.
        !           825:    FNADDR is an RTX for the address of the function's pure code.
        !           826:    CXT is an RTX for the static chain value for the function.  */
        !           827: 
        !           828: #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, CXT)               \
        !           829: {                                                              \
        !           830:   emit_move_insn (gen_rtx (MEM, SImode, memory_address (SImode, ADDR)), \
        !           831:                  force_reg (SImode, FNADDR));                  \
        !           832:   emit_move_insn (gen_rtx (MEM, SImode,                                \
        !           833:                           memory_address (SImode, plus_constant (ADDR, 4))), \
        !           834:                  gen_rtx (REG, SImode, 2));                    \
        !           835:   emit_move_insn (gen_rtx (MEM, SImode,                                \
        !           836:                           memory_address (SImode, plus_constant (ADDR, 8))), \
        !           837:                  force_reg (SImode, CXT));                     \
        !           838: }
        !           839: 
        !           840: /* Definitions for register eliminations.
        !           841: 
        !           842:    We have two registers that can be eliminated on the RS/6000.  First, the
        !           843:    frame pointer register can often be eliminated in favor of the stack
        !           844:    pointer register.  Secondly, the argument pointer register can always be
        !           845:    eliminated; it is replaced with either the stack or frame pointer.  */
        !           846: 
        !           847: /* This is an array of structures.  Each structure initializes one pair
        !           848:    of eliminable registers.  The "from" register number is given first,
        !           849:    followed by "to".  Eliminations of the same "from" register are listed
        !           850:    in order of preference.  */
        !           851: #define ELIMINABLE_REGS                                \
        !           852: {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM},        \
        !           853:  { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM},  \
        !           854:  { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM} }
        !           855: 
        !           856: /* Given FROM and TO register numbers, say whether this elimination is allowed.
        !           857:    Frame pointer elimination is automatically handled.
        !           858: 
        !           859:    For the RS/6000, if frame pointer elimination is being done, we would like
        !           860:    to convert ap into fp, not sp.  */
        !           861: 
        !           862: #define CAN_ELIMINATE(FROM, TO)                                        \
        !           863:  ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \
        !           864:   ? ! frame_pointer_needed                                     \
        !           865:   : 1)
        !           866: 
        !           867: /* Define the offset between two registers, one to be eliminated, and the other
        !           868:    its replacement, at the start of a routine.  */
        !           869: #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                   \
        !           870: {                                                                      \
        !           871:   int total_stack_size = (rs6000_sa_size () + get_frame_size ()                \
        !           872:                          + current_function_outgoing_args_size);       \
        !           873:                                                                        \
        !           874:   total_stack_size = (total_stack_size + 7) & ~7;                      \
        !           875:                                                                        \
        !           876:  if ((FROM) == FRAME_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM)   \
        !           877:     {                                                                  \
        !           878:       if (rs6000_pushes_stack ())                                      \
        !           879:        (OFFSET) = 0;                                                   \
        !           880:       else                                                             \
        !           881:        (OFFSET) = - total_stack_size;                                  \
        !           882:     }                                                                  \
        !           883:   else if ((FROM) == ARG_POINTER_REGNUM && (TO) == FRAME_POINTER_REGNUM) \
        !           884:       (OFFSET) = total_stack_size;                                     \
        !           885:   else if ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \
        !           886:     {                                                                  \
        !           887:       if (rs6000_pushes_stack ())                                      \
        !           888:        (OFFSET) = total_stack_size;                                    \
        !           889:       else                                                             \
        !           890:        (OFFSET) = 0;                                                   \
        !           891:     }                                                                  \
        !           892:   else                                                                 \
        !           893:     abort ();                                                          \
        !           894: }
        !           895: 
        !           896: /* Addressing modes, and classification of registers for them.  */
        !           897: 
        !           898: /* #define HAVE_POST_INCREMENT */
        !           899: /* #define HAVE_POST_DECREMENT */
        !           900: 
        !           901: #define HAVE_PRE_DECREMENT
        !           902: #define HAVE_PRE_INCREMENT
        !           903: 
        !           904: /* Macros to check register numbers against specific register classes.  */
        !           905: 
        !           906: /* These assume that REGNO is a hard or pseudo reg number.
        !           907:    They give nonzero only if REGNO is a hard reg of the suitable class
        !           908:    or a pseudo reg currently allocated to a suitable hard reg.
        !           909:    Since they use reg_renumber, they are safe only once reg_renumber
        !           910:    has been allocated, which happens in local-alloc.c.  */
        !           911: 
        !           912: #define REGNO_OK_FOR_INDEX_P(REGNO)                            \
        !           913: ((REGNO) < FIRST_PSEUDO_REGISTER                               \
        !           914:  ? (REGNO) <= 31 || (REGNO) == 67                              \
        !           915:  : (reg_renumber[REGNO] >= 0                                   \
        !           916:     && (reg_renumber[REGNO] <= 31 || reg_renumber[REGNO] == 67)))
        !           917: 
        !           918: #define REGNO_OK_FOR_BASE_P(REGNO)                             \
        !           919: ((REGNO) < FIRST_PSEUDO_REGISTER                               \
        !           920:  ? ((REGNO) > 0 && (REGNO) <= 31) || (REGNO) == 67             \
        !           921:  : (reg_renumber[REGNO] > 0                                    \
        !           922:     && (reg_renumber[REGNO] <= 31 || reg_renumber[REGNO] == 67)))
        !           923: 
        !           924: /* Maximum number of registers that can appear in a valid memory address.  */
        !           925: 
        !           926: #define MAX_REGS_PER_ADDRESS 2
        !           927: 
        !           928: /* Recognize any constant value that is a valid address.  */
        !           929: 
        !           930: #define CONSTANT_ADDRESS_P(X)  CONSTANT_P (X)
        !           931: 
        !           932: /* Nonzero if the constant value X is a legitimate general operand.
        !           933:    It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.
        !           934: 
        !           935:    On the RS/6000, all integer constants are acceptable, most won't be valid
        !           936:    for particular insns, though.  Only easy FP constants are
        !           937:    acceptable.  */
        !           938: 
        !           939: #define LEGITIMATE_CONSTANT_P(X)                               \
        !           940:   (GET_CODE (X) != CONST_DOUBLE || GET_MODE (X) == VOIDmode    \
        !           941:    || easy_fp_constant (X, GET_MODE (X)))
        !           942: 
        !           943: /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
        !           944:    and check its validity for a certain class.
        !           945:    We have two alternate definitions for each of them.
        !           946:    The usual definition accepts all pseudo regs; the other rejects
        !           947:    them unless they have been allocated suitable hard regs.
        !           948:    The symbol REG_OK_STRICT causes the latter definition to be used.
        !           949: 
        !           950:    Most source files want to accept pseudo regs in the hope that
        !           951:    they will get allocated to the class that the insn wants them to be in.
        !           952:    Source files for reload pass need to be strict.
        !           953:    After reload, it makes no difference, since pseudo regs have
        !           954:    been eliminated by then.  */
        !           955: 
        !           956: #ifndef REG_OK_STRICT
        !           957: 
        !           958: /* Nonzero if X is a hard reg that can be used as an index
        !           959:    or if it is a pseudo reg.  */
        !           960: #define REG_OK_FOR_INDEX_P(X)                  \
        !           961:   (REGNO (X) <= 31 || REGNO (X) == 67 || REGNO (X) >= FIRST_PSEUDO_REGISTER)
        !           962: 
        !           963: /* Nonzero if X is a hard reg that can be used as a base reg
        !           964:    or if it is a pseudo reg.  */
        !           965: #define REG_OK_FOR_BASE_P(X)                                    \
        !           966:   (REGNO (X) > 0 && REG_OK_FOR_INDEX_P (X))
        !           967: 
        !           968: #else
        !           969: 
        !           970: /* Nonzero if X is a hard reg that can be used as an index.  */
        !           971: #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
        !           972: /* Nonzero if X is a hard reg that can be used as a base reg.  */
        !           973: #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
        !           974: 
        !           975: #endif
        !           976: 
        !           977: /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
        !           978:    that is a valid memory address for an instruction.
        !           979:    The MODE argument is the machine mode for the MEM expression
        !           980:    that wants to use this address.
        !           981: 
        !           982:    On the RS/6000, there are four valid address: a SYMBOL_REF that
        !           983:    refers to a constant pool entry of an address (or the sum of it
        !           984:    plus a constant), a short (16-bit signed) constant plus a register,
        !           985:    the sum of two registers, or a register indirect, possibly with an
        !           986:    auto-increment.  For DFmode and DImode with an constant plus register,
        !           987:    we must ensure that both words are addressable.  */
        !           988: 
        !           989: #define LEGITIMATE_CONSTANT_POOL_BASE_P(X)                             \
        !           990:   (GET_CODE (X) == SYMBOL_REF && CONSTANT_POOL_ADDRESS_P (X)           \
        !           991:    && ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (get_pool_constant (X)))
        !           992: 
        !           993: #define LEGITIMATE_CONSTANT_POOL_ADDRESS_P(X)                          \
        !           994:   (LEGITIMATE_CONSTANT_POOL_BASE_P (X)                                 \
        !           995:    || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS         \
        !           996:        && GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT                        \
        !           997:        && LEGITIMATE_CONSTANT_POOL_BASE_P (XEXP (XEXP (X, 0), 0))))
        !           998: 
        !           999: #define LEGITIMATE_ADDRESS_INTEGER_P(X,OFFSET)                         \
        !          1000:  (GET_CODE (X) == CONST_INT                                            \
        !          1001:   && (unsigned) (INTVAL (X) + (OFFSET) + 0x8000) < 0x10000)
        !          1002: 
        !          1003: #define LEGITIMATE_OFFSET_ADDRESS_P(MODE,X)            \
        !          1004:  (GET_CODE (X) == PLUS                                 \
        !          1005:   && GET_CODE (XEXP (X, 0)) == REG                     \
        !          1006:   && REG_OK_FOR_BASE_P (XEXP (X, 0))                   \
        !          1007:   && LEGITIMATE_ADDRESS_INTEGER_P (XEXP (X, 1), 0)     \
        !          1008:   && (((MODE) != DFmode && (MODE) != DImode)           \
        !          1009:       || LEGITIMATE_ADDRESS_INTEGER_P (XEXP (X, 1), 4)))
        !          1010: 
        !          1011: #define LEGITIMATE_INDEXED_ADDRESS_P(X)                \
        !          1012:  (GET_CODE (X) == PLUS                         \
        !          1013:   && GET_CODE (XEXP (X, 0)) == REG             \
        !          1014:   && GET_CODE (XEXP (X, 1)) == REG             \
        !          1015:   && ((REG_OK_FOR_BASE_P (XEXP (X, 0))         \
        !          1016:        && REG_OK_FOR_INDEX_P (XEXP (X, 1)))    \
        !          1017:       || (REG_OK_FOR_BASE_P (XEXP (X, 1))      \
        !          1018:          && REG_OK_FOR_INDEX_P (XEXP (X, 0)))))
        !          1019: 
        !          1020: #define LEGITIMATE_INDIRECT_ADDRESS_P(X)       \
        !          1021:   (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X))
        !          1022: 
        !          1023: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR)                \
        !          1024: { if (LEGITIMATE_INDIRECT_ADDRESS_P (X))               \
        !          1025:     goto ADDR;                                         \
        !          1026:   if (GET_CODE (X) == PRE_INC                          \
        !          1027:       && LEGITIMATE_INDIRECT_ADDRESS_P (XEXP (X, 0)))  \
        !          1028:     goto ADDR;                                         \
        !          1029:   if (GET_CODE (X) == PRE_DEC                          \
        !          1030:       && LEGITIMATE_INDIRECT_ADDRESS_P (XEXP (X, 0)))  \
        !          1031:     goto ADDR;                                         \
        !          1032:   if (LEGITIMATE_CONSTANT_POOL_ADDRESS_P (X))          \
        !          1033:     goto ADDR;                                         \
        !          1034:   if (LEGITIMATE_OFFSET_ADDRESS_P (MODE, X))           \
        !          1035:     goto ADDR;                                         \
        !          1036:   if ((MODE) != DImode && (MODE) != TImode             \
        !          1037:       && LEGITIMATE_INDEXED_ADDRESS_P (X))             \
        !          1038:     goto ADDR;                                         \
        !          1039: }
        !          1040: 
        !          1041: /* Try machine-dependent ways of modifying an illegitimate address
        !          1042:    to be legitimate.  If we find one, return the new, valid address.
        !          1043:    This macro is used in only one place: `memory_address' in explow.c.
        !          1044: 
        !          1045:    OLDX is the address as it was before break_out_memory_refs was called.
        !          1046:    In some cases it is useful to look at this to decide what needs to be done.
        !          1047: 
        !          1048:    MODE and WIN are passed so that this macro can use
        !          1049:    GO_IF_LEGITIMATE_ADDRESS.
        !          1050: 
        !          1051:    It is always safe for this macro to do nothing.  It exists to recognize
        !          1052:    opportunities to optimize the output.
        !          1053: 
        !          1054:    On RS/6000, first check for the sum of a register with a constant
        !          1055:    integer that is out of range.  If so, generate code to add the
        !          1056:    constant with the low-order 16 bits masked to the register and force
        !          1057:    this result into another register (this can be done with `cau').
        !          1058:    Then generate an address of REG+(CONST&0xffff), allowing for the 
        !          1059:    possibility of bit 16 being a one.
        !          1060: 
        !          1061:    Then check for the sum of a register and something not constant, try to
        !          1062:    load the other things into a register and return the sum.  */
        !          1063: 
        !          1064: #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN)                    \
        !          1065: { if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == REG    \
        !          1066:     && GET_CODE (XEXP (X, 1)) == CONST_INT                     \
        !          1067:     && (unsigned) (INTVAL (XEXP (X, 1)) + 0x8000) >= 0x10000)  \
        !          1068:     { int high_int, low_int;                                   \
        !          1069:       high_int = INTVAL (XEXP (X, 1)) >> 16;                   \
        !          1070:       low_int = INTVAL (XEXP (X, 1)) & 0xffff;                 \
        !          1071:       if (low_int & 0x8000)                                    \
        !          1072:        high_int += 1, low_int |= 0xffff0000;                   \
        !          1073:       (X) = gen_rtx (PLUS, SImode,                             \
        !          1074:                     force_operand                              \
        !          1075:                        (gen_rtx (PLUS, SImode, XEXP (X, 0), \
        !          1076:                                  gen_rtx (CONST_INT, VOIDmode, \
        !          1077:                                                      high_int << 16)), 0),\
        !          1078:                     gen_rtx (CONST_INT, VOIDmode, low_int));   \
        !          1079:     }                                                          \
        !          1080:   else if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == REG \
        !          1081:           && GET_CODE (XEXP (X, 1)) != CONST_INT)              \
        !          1082:     (X) = gen_rtx (PLUS, SImode, XEXP (X, 0),                  \
        !          1083:                   force_operand (XEXP (X, 1), 0));             \
        !          1084: }
        !          1085: 
        !          1086: /* Go to LABEL if ADDR (a legitimate address expression)
        !          1087:    has an effect that depends on the machine mode it is used for.
        !          1088: 
        !          1089:    On the RS/6000 this is true if the address is valid with a zero offset
        !          1090:    but not with an offset of four (this means it cannot be used as an
        !          1091:    address for DImode or DFmode) or is a pre-increment or decrement.  Since
        !          1092:    we know it is valid, we just check for an address that is not valid with
        !          1093:    an offset of four.  */
        !          1094: 
        !          1095: #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)               \
        !          1096: { if (GET_CODE (ADDR) == PLUS                                  \
        !          1097:       && LEGITIMATE_ADDRESS_INTEGER_P (XEXP (ADDR, 1), 0)      \
        !          1098:       && ! LEGITIMATE_ADDRESS_INTEGER_P (XEXP (ADDR, 1), 4))   \
        !          1099:     goto LABEL;                                                        \
        !          1100:   if (GET_CODE (ADDR) == PRE_INC)                              \
        !          1101:     goto LABEL;                                                        \
        !          1102:   if (GET_CODE (ADDR) == PRE_DEC)                              \
        !          1103:     goto LABEL;                                                        \
        !          1104: }
        !          1105: 
        !          1106: /* Define this if some processing needs to be done immediately before
        !          1107:    emitting code for an insn. */
        !          1108: 
        !          1109: /* #define FINAL_PRESCAN_INSN(INSN,OPERANDS,NOPERANDS) */
        !          1110: 
        !          1111: /* Specify the machine mode that this machine uses
        !          1112:    for the index in the tablejump instruction.  */
        !          1113: #define CASE_VECTOR_MODE SImode
        !          1114: 
        !          1115: /* Define this if the tablejump instruction expects the table
        !          1116:    to contain offsets from the address of the table.
        !          1117:    Do not define this if the table should contain absolute addresses.  */
        !          1118: #define CASE_VECTOR_PC_RELATIVE
        !          1119: 
        !          1120: /* Specify the tree operation to be used to convert reals to integers.  */
        !          1121: #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
        !          1122: 
        !          1123: /* This is the kind of divide that is easiest to do in the general case.  */
        !          1124: #define EASY_DIV_EXPR TRUNC_DIV_EXPR
        !          1125: 
        !          1126: /* Define this as 1 if `char' should by default be signed; else as 0.  */
        !          1127: #define DEFAULT_SIGNED_CHAR 0
        !          1128: 
        !          1129: /* This flag, if defined, says the same insns that convert to a signed fixnum
        !          1130:    also convert validly to an unsigned one.  */
        !          1131: 
        !          1132: /* #define FIXUNS_TRUNC_LIKE_FIX_TRUNC */
        !          1133: 
        !          1134: /* Max number of bytes we can move from memory to memory
        !          1135:    in one reasonably fast instruction.  */
        !          1136: #define MOVE_MAX 16
        !          1137: 
        !          1138: /* Nonzero if access to memory by bytes is no faster than for words.
        !          1139:    Also non-zero if doing byte operations (specifically shifts) in registers
        !          1140:    is undesirable.  */
        !          1141: #define SLOW_BYTE_ACCESS 1
        !          1142: 
        !          1143: /* Define if normal loads of shorter-than-word items from memory clears
        !          1144:    the rest of the bigs in the register.  */
        !          1145: #define BYTE_LOADS_ZERO_EXTEND
        !          1146: 
        !          1147: /* We can't support any debugging info on the RS/6000 since it has its
        !          1148:    own format.  */
        !          1149: /* #define DBX_DEBUGGING_INFO  */
        !          1150: /* #define SDB_DEBUGGING_INFO  */
        !          1151: 
        !          1152: /* We don't have GAS for the RS/6000 yet, so don't write out special
        !          1153:    .stabs in cc1plus.  */
        !          1154:    
        !          1155: #define FASCIST_ASSEMBLER
        !          1156: 
        !          1157: /* Do not break .stabs pseudos into continuations.  */
        !          1158: #define DBX_CONTIN_LENGTH 0
        !          1159: 
        !          1160: /* Don't try to use the `x' type-cross-reference character in DBX data.
        !          1161:    Also has the consequence of putting each struct, union or enum
        !          1162:    into a separate .stabs, containing only cross-refs to the others.  */
        !          1163: #define DBX_NO_XREFS
        !          1164: 
        !          1165: /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
        !          1166:    is done just by pretending it is already truncated.  */
        !          1167: #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
        !          1168: 
        !          1169: /* Specify the machine mode that pointers have.
        !          1170:    After generation of rtl, the compiler makes no further distinction
        !          1171:    between pointers and any other objects of this machine mode.  */
        !          1172: #define Pmode SImode
        !          1173: 
        !          1174: /* Mode of a function address in a call instruction (for indexing purposes).
        !          1175: 
        !          1176:    Doesn't matter on RS/6000.  */
        !          1177: #define FUNCTION_MODE SImode
        !          1178: 
        !          1179: /* Define this if addresses of constant functions
        !          1180:    shouldn't be put through pseudo regs where they can be cse'd.
        !          1181:    Desirable on machines where ordinary constants are expensive
        !          1182:    but a CALL with constant address is cheap.  */
        !          1183: #define NO_FUNCTION_CSE
        !          1184: 
        !          1185: /* Define this if shift instructions ignore all but the low-order
        !          1186:    few bits. */
        !          1187: #define SHIFT_COUNT_TRUNCATED
        !          1188: 
        !          1189: /* Use atexit for static constructors/destructors, instead of defining
        !          1190:    our own exit function.  */
        !          1191: #define HAVE_ATEXIT
        !          1192: 
        !          1193: /* Compute the cost of computing a constant rtl expression RTX
        !          1194:    whose rtx-code is CODE.  The body of this macro is a portion
        !          1195:    of a switch statement.  If the code is computed here,
        !          1196:    return it with a return statement.  Otherwise, break from the switch.
        !          1197: 
        !          1198:    On the RS/6000, if it is legal in the insn, it is free.  So this
        !          1199:    always returns 0.  */
        !          1200: 
        !          1201: #define CONST_COSTS(RTX,CODE) \
        !          1202:   case CONST_INT:                                              \
        !          1203:   case CONST:                                                  \
        !          1204:   case LABEL_REF:                                              \
        !          1205:   case SYMBOL_REF:                                             \
        !          1206:   case CONST_DOUBLE:                                           \
        !          1207:     return 0;
        !          1208: 
        !          1209: /* Provide the costs of a rtl expression.  This is in the body of a
        !          1210:    switch on CODE.  */
        !          1211: 
        !          1212: #define RTX_COSTS(X,CODE)                              \
        !          1213:   case MULT:                                           \
        !          1214:     return (GET_CODE (XEXP (X, 1)) != CONST_INT                \
        !          1215:            ? COSTS_N_INSNS (5)                         \
        !          1216:            : INTVAL (XEXP (X, 1)) >= -256 && INTVAL (XEXP (X, 1)) <= 255 \
        !          1217:            ? COSTS_N_INSNS (3) : COSTS_N_INSNS (4));   \
        !          1218:   case DIV:                                            \
        !          1219:   case MOD:                                            \
        !          1220:     if (GET_CODE (XEXP (X, 1)) == CONST_INT            \
        !          1221:        && exact_log2 (INTVAL (XEXP (X, 1))) >= 0)      \
        !          1222:       return COSTS_N_INSNS (2);                                \
        !          1223:     /* otherwise fall through to normal divide.  */    \
        !          1224:   case UDIV:                                           \
        !          1225:   case UMOD:                                           \
        !          1226:     return COSTS_N_INSNS (19);                         \
        !          1227:   case MEM:                                            \
        !          1228:     /* MEM should be slightly more expensive than (plus (reg) (const)) */ \
        !          1229:     return 5;
        !          1230: 
        !          1231: /* Compute the cost of an address.  This is meant to approximate the size
        !          1232:    and/or execution delay of an insn using that address.  If the cost is
        !          1233:    approximated by the RTL complexity, including CONST_COSTS above, as
        !          1234:    is usually the case for CISC machines, this macro should not be defined.
        !          1235:    For aggressively RISCy machines, only one insn format is allowed, so
        !          1236:    this macro should be a constant.  The value of this macro only matters
        !          1237:    for valid addresses.
        !          1238: 
        !          1239:    For the RS/6000, everything is cost 0.  */
        !          1240: 
        !          1241: #define ADDRESS_COST(RTX) 0
        !          1242: 
        !          1243: /* Adjust the length of an INSN.  LENGTH is the currently-computed length and
        !          1244:    should be adjusted to reflect any required changes.  This macro is used when
        !          1245:    there is some systematic length adjustment required that would be difficult
        !          1246:    to express in the length attribute.  */
        !          1247: 
        !          1248: /* #define ADJUST_INSN_LENGTH(X,LENGTH) */
        !          1249: 
        !          1250: /* Add any extra modes needed to represent the condition code.
        !          1251: 
        !          1252:    For the RS/6000, we need separate modes when unsigned (logical) comparisons
        !          1253:    are being done and we need a separate mode for floating-point.  */
        !          1254: 
        !          1255: #define EXTRA_CC_MODES CCUNSmode, CCFPmode
        !          1256: 
        !          1257: /* Define the names for the modes specified above.  */
        !          1258: #define EXTRA_CC_NAMES "CCUNS", "CCFP"
        !          1259: 
        !          1260: /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE,
        !          1261:    return the mode to be used for the comparison.  For floating-point, CCFPmode
        !          1262:    should be used.  CC_NOOVmode should be used when the first operand is a
        !          1263:    PLUS, MINUS, or NEG.  CCmode should be used when no special processing is
        !          1264:    needed.  */
        !          1265: #define SELECT_CC_MODE(OP,X) \
        !          1266:   (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT ? CCFPmode      \
        !          1267:    : ((OP) == GTU || (OP) == LTU || (OP) == GEU || (OP) == LEU \
        !          1268:       ? CCUNSmode : CCmode))
        !          1269: 
        !          1270: /* Define the information needed to generate branch and scc insns.  This is
        !          1271:    stored from the compare operation.  Note that we can't use "rtx" here
        !          1272:    since it hasn't been defined!  */
        !          1273: 
        !          1274: extern struct rtx_def *rs6000_compare_op0, *rs6000_compare_op1;
        !          1275: extern int rs6000_compare_fp_p;
        !          1276: 
        !          1277: /* Set to non-zero by "fix" operation to indicate that itrunc and
        !          1278:    uitrunc must be defined.  */
        !          1279: 
        !          1280: extern int rs6000_trunc_used;
        !          1281: 
        !          1282: /* Control the assembler format that we output.  */
        !          1283: 
        !          1284: /* Output at beginning of assembler file.
        !          1285: 
        !          1286:    On the RS/6000, we want to go into the TOC section so at least one
        !          1287:    .toc will be emitted.
        !          1288: 
        !          1289:    Also initialize the section names for the RS/6000 at this point.  */
        !          1290: 
        !          1291: #define ASM_FILE_START(FILE)                                   \
        !          1292: {                                                              \
        !          1293:   rs6000_gen_section_name (&rs6000_bss_section_name,           \
        !          1294:                           main_input_filename, ".bss_");       \
        !          1295:   rs6000_gen_section_name (&rs6000_private_data_section_name,  \
        !          1296:                           main_input_filename, ".rw_");        \
        !          1297:   rs6000_gen_section_name (&rs6000_read_only_section_name,     \
        !          1298:                           main_input_filename, ".ro_");        \
        !          1299:                                                                \
        !          1300:   toc_section ();                                              \
        !          1301:   bss_section ();                                              \
        !          1302: }
        !          1303: 
        !          1304: /* Output at end of assembler file.
        !          1305: 
        !          1306:    On the RS/6000, referencing data should automatically pull in text.  */
        !          1307: 
        !          1308: #define ASM_FILE_END(FILE)                                     \
        !          1309: {                                                              \
        !          1310:   text_section ();                                             \
        !          1311:   fprintf (FILE, "_section_.text:\n");                         \
        !          1312:   data_section ();                                             \
        !          1313:   fprintf (FILE, "\t.long _section_.text\n");                  \
        !          1314: }
        !          1315: 
        !          1316: /* Names of bss and data sections.  These should be unique names for each
        !          1317:    compilation unit.  */
        !          1318: 
        !          1319: extern char *rs6000_bss_section_name;
        !          1320: extern char *rs6000_private_data_section_name;
        !          1321: extern char *rs6000_read_only_section_name;
        !          1322: 
        !          1323: /* We define this to prevent the name mangler from putting dollar signs into
        !          1324:    function names.  */
        !          1325: 
        !          1326: #define NO_DOLLAR_IN_LABEL
        !          1327: 
        !          1328: /* We define this to 0 so that gcc will never accept a dollar sign in a
        !          1329:    variable name.  This is needed because the AIX assembler will not accept
        !          1330:    dollar signs.  */
        !          1331: 
        !          1332: #define DOLLARS_IN_IDENTIFIERS 0
        !          1333: 
        !          1334: /* Define the extra sections we need.  We define three: one is the read-only
        !          1335:    data section which is used for constants.  This is a csect whose name is
        !          1336:    derived from the name of the input file.  The second is for initialized
        !          1337:    global variables.  This is a csect whose name is that of the variable.
        !          1338:    The third is the TOC.  */
        !          1339: 
        !          1340: #define EXTRA_SECTIONS \
        !          1341:    read_only_data, private_data, read_only_private_data, toc, bss
        !          1342: 
        !          1343: /* Define the name of our readonly data section.  */
        !          1344: 
        !          1345: #define READONLY_DATA_SECTION read_only_data_section
        !          1346: 
        !          1347: /* Indicate that jump tables go in the text section.  */
        !          1348: 
        !          1349: #define JUMP_TABLES_IN_TEXT_SECTION
        !          1350: 
        !          1351: /* Define the routines to implement these extra sections.  */
        !          1352: 
        !          1353: #define EXTRA_SECTION_FUNCTIONS                                \
        !          1354:                                                        \
        !          1355: void                                                   \
        !          1356: read_only_data_section ()                              \
        !          1357: {                                                      \
        !          1358:   if (in_section != read_only_data)                    \
        !          1359:     {                                                  \
        !          1360:       fprintf (asm_out_file, "\t.csect\t%s[RO]\n",     \
        !          1361:               rs6000_read_only_section_name);          \
        !          1362:       in_section = read_only_data;                     \
        !          1363:     }                                                  \
        !          1364: }                                                      \
        !          1365:                                                        \
        !          1366: void                                                   \
        !          1367: private_data_section ()                                        \
        !          1368: {                                                      \
        !          1369:   if (in_section != private_data)                      \
        !          1370:     {                                                  \
        !          1371:       fprintf (asm_out_file, "\t.csect %s[RW]\n",      \
        !          1372:               rs6000_private_data_section_name);       \
        !          1373:                                                        \
        !          1374:       in_section = private_data;                       \
        !          1375:     }                                                  \
        !          1376: }                                                      \
        !          1377:                                                        \
        !          1378: void                                                   \
        !          1379: read_only_private_data_section ()                      \
        !          1380: {                                                      \
        !          1381:   if (in_section != read_only_private_data)            \
        !          1382:     {                                                  \
        !          1383:       fprintf (asm_out_file, "\t.csect\t%s[RO]\n",     \
        !          1384:               rs6000_private_data_section_name);       \
        !          1385:       in_section = read_only_private_data;             \
        !          1386:     }                                                  \
        !          1387: }                                                      \
        !          1388:                                                        \
        !          1389: void                                                   \
        !          1390: toc_section ()                                         \
        !          1391: {                                                      \
        !          1392:   if (in_section != toc)                               \
        !          1393:     fprintf (asm_out_file, "\t.toc\n");                        \
        !          1394:                                                        \
        !          1395:   in_section = toc;                                    \
        !          1396: }                                                      \
        !          1397:                                                        \
        !          1398: void                                                   \
        !          1399: bss_section ()                                         \
        !          1400: {                                                      \
        !          1401:   if (in_section != bss)                               \
        !          1402:     {                                                  \
        !          1403:       fprintf (asm_out_file, "\t.csect\t%s[BS]\n",     \
        !          1404:               rs6000_bss_section_name);                \
        !          1405:       in_section = bss;                                        \
        !          1406:     }                                                  \
        !          1407: }                                                      \
        !          1408: 
        !          1409: /* This macro produces the initial definition of a function name.
        !          1410:    On the RS/6000, we need to place an extra '.' in the function name and
        !          1411:    output the function descriptor.  
        !          1412: 
        !          1413:    The csect for the function will have already been created by the
        !          1414:    `text_section' call previously done.  We do have to go back to that
        !          1415:    csect, however.  */
        !          1416: 
        !          1417: #define ASM_DECLARE_FUNCTION_NAME(FILE,NAME,DECL)              \
        !          1418: { if (TREE_PUBLIC (DECL))                                      \
        !          1419:     {                                                          \
        !          1420:       fprintf (FILE, "\t.globl .");                            \
        !          1421:       RS6000_OUTPUT_BASENAME (FILE, NAME);                     \
        !          1422:       fprintf (FILE,"\n");                                     \
        !          1423:     }                                                          \
        !          1424:   fprintf (FILE, "\t.csect ");                                 \
        !          1425:   RS6000_OUTPUT_BASENAME (FILE, NAME);                         \
        !          1426:   fprintf (FILE, "[DS]\n");                                    \
        !          1427:   RS6000_OUTPUT_BASENAME (FILE, NAME);                         \
        !          1428:   fprintf (FILE, ":\n");                                       \
        !          1429:   fprintf (FILE, "\t.long .");                                 \
        !          1430:   RS6000_OUTPUT_BASENAME (FILE, NAME);                         \
        !          1431:   fprintf (FILE, ", TOC[tc0], 0\n");                   \
        !          1432:   fprintf (FILE, "\t.csect [PR]\n.");                          \
        !          1433:   RS6000_OUTPUT_BASENAME (FILE, NAME);                         \
        !          1434:   fprintf (FILE, ":\n");                                       \
        !          1435: }
        !          1436: 
        !          1437: /* Return non-zero if this entry is to be written into the constant pool
        !          1438:    in a special way.  We do so if this is a SYMBOL_REF, LABEL_REF or a CONST
        !          1439:    containing one of them.  If -mfp-in-toc (the default), we also do
        !          1440:    this for floating-point constants.  We actually can only do this
        !          1441:    if the FP formats of the target and host machines are the same, but
        !          1442:    we can't check that since not every file that uses
        !          1443:    GO_IF_LEGITIMATE_ADDRESS_P includes real.h.  */
        !          1444: 
        !          1445: #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X)                     \
        !          1446:   (GET_CODE (X) == SYMBOL_REF                                  \
        !          1447:    || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \
        !          1448:        && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF)      \
        !          1449:    || GET_CODE (X) == LABEL_REF                                        \
        !          1450:    || (TARGET_FP_IN_TOC && GET_CODE (X) == CONST_DOUBLE                \
        !          1451:        && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT          \
        !          1452:        && BITS_PER_WORD == HOST_BITS_PER_INT))
        !          1453: 
        !          1454: /* Select section for constant in constant pool.
        !          1455: 
        !          1456:    On RS/6000, all constants are in the private read-only data area.
        !          1457:    However, if this is being placed in the TOC it must be output as a
        !          1458:    toc entry.  */
        !          1459: 
        !          1460: #define SELECT_RTX_SECTION(MODE, X)            \
        !          1461: { if (ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (X))     \
        !          1462:     toc_section ();                            \
        !          1463:   else                                         \
        !          1464:     read_only_private_data_section ();         \
        !          1465: }
        !          1466: 
        !          1467: /* Macro to output a special constant pool entry.  Go to WIN if we output
        !          1468:    it.  Otherwise, it is written the usual way.
        !          1469: 
        !          1470:    On the RS/6000, toc entries are handled this way.  */
        !          1471: 
        !          1472: #define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE, X, MODE, ALIGN, LABELNO, WIN)  \
        !          1473: { if (ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (X))     \
        !          1474:     {                                          \
        !          1475:       output_toc (FILE, X, LABELNO);           \
        !          1476:       goto WIN;                                        \
        !          1477:     }                                          \
        !          1478: }
        !          1479: 
        !          1480: /* Select the section for an initialized data object.
        !          1481: 
        !          1482:    On the RS/6000, we have a special section for all variables except those
        !          1483:    that are static.  */
        !          1484: 
        !          1485: #define SELECT_SECTION(EXP,RELOC)                      \
        !          1486: {                                                      \
        !          1487:   if ((TREE_READONLY (EXP)                             \
        !          1488:        || (TREE_CODE (EXP) == STRING_CST               \
        !          1489:           && !flag_writable_strings))                  \
        !          1490:       && ! TREE_THIS_VOLATILE (EXP)                    \
        !          1491:       && ! (RELOC))                                    \
        !          1492:     {                                                  \
        !          1493:       if (TREE_PUBLIC (EXP))                           \
        !          1494:         read_only_data_section ();                     \
        !          1495:       else                                             \
        !          1496:         read_only_private_data_section ();             \
        !          1497:     }                                                  \
        !          1498:   else                                                 \
        !          1499:     {                                                  \
        !          1500:       if (TREE_PUBLIC (EXP))                           \
        !          1501:         data_section ();                               \
        !          1502:       else                                             \
        !          1503:         private_data_section ();                       \
        !          1504:     }                                                  \
        !          1505: }
        !          1506: 
        !          1507: /* This outputs NAME to FILE up to the first null or '['.  */
        !          1508: 
        !          1509: #define RS6000_OUTPUT_BASENAME(FILE, NAME)     \
        !          1510:   if ((NAME)[0] == '*')                                \
        !          1511:     assemble_name (FILE, NAME);                \
        !          1512:   else                                         \
        !          1513:     {                                          \
        !          1514:       char *_p;                                        \
        !          1515:       for (_p = (NAME); *_p && *_p != '['; _p++) \
        !          1516:         fputc (*_p, FILE);                             \
        !          1517:     }
        !          1518: 
        !          1519: /* Output something to declare an external symbol to the assembler.  Most
        !          1520:    assemblers don't need this.  
        !          1521: 
        !          1522:    If we haven't already, add "[RW]" (or "[DS]" for a function) to the
        !          1523:    name.  Normally we write this out along with the name.  In the few cases
        !          1524:    where we can't, it gets stripped off.  */
        !          1525: 
        !          1526: #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME)  \
        !          1527: { rtx _symref = XEXP (DECL_RTL (DECL), 0);     \
        !          1528:   if ((TREE_CODE (DECL) == VAR_DECL            \
        !          1529:        || TREE_CODE (DECL) == FUNCTION_DECL)   \
        !          1530:       && (NAME)[0] != '*'                      \
        !          1531:       && (NAME)[strlen (NAME) - 1] != ']')     \
        !          1532:     {                                          \
        !          1533:       char *_name = (char *) permalloc (strlen (XSTR (_symref, 0)) + 5); \
        !          1534:       strcpy (_name, XSTR (_symref, 0));       \
        !          1535:       strcat (_name, TREE_CODE (DECL) == FUNCTION_DECL ? "[DS]" : "[RW]"); \
        !          1536:       XSTR (_symref, 0) = _name;               \
        !          1537:     }                                          \
        !          1538:   fprintf (FILE, "\t.extern ");                        \
        !          1539:   assemble_name (FILE, XSTR (_symref, 0));     \
        !          1540:   if (TREE_CODE (DECL) == FUNCTION_DECL)       \
        !          1541:     {                                          \
        !          1542:       fprintf (FILE, "\n\t.extern .");         \
        !          1543:       RS6000_OUTPUT_BASENAME (FILE, XSTR (_symref, 0));        \
        !          1544:     }                                          \
        !          1545:   fprintf (FILE, "\n");                                \
        !          1546: }
        !          1547: 
        !          1548: /* Similar, but for libcall.  We only have to worry about the function name,
        !          1549:    not that of the descriptor. */
        !          1550: 
        !          1551: #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
        !          1552: { fprintf (FILE, "\t.extern .");               \
        !          1553:   assemble_name (FILE, XSTR (FUN, 0));         \
        !          1554:   fprintf (FILE, "\n");                                \
        !          1555: }
        !          1556: 
        !          1557: /* Output to assembler file text saying following lines
        !          1558:    may contain character constants, extra white space, comments, etc.  */
        !          1559: 
        !          1560: #define ASM_APP_ON ""
        !          1561: 
        !          1562: /* Output to assembler file text saying following lines
        !          1563:    no longer contain unusual constructs.  */
        !          1564: 
        !          1565: #define ASM_APP_OFF ""
        !          1566: 
        !          1567: /* Output before instructions.  */
        !          1568: 
        !          1569: #define TEXT_SECTION_ASM_OP "\t.csect [PR]"
        !          1570: 
        !          1571: /* Output before writable data.  */
        !          1572: 
        !          1573: #define DATA_SECTION_ASM_OP "\t.csect .data[RW]"
        !          1574: 
        !          1575: /* How to refer to registers in assembler output.
        !          1576:    This sequence is indexed by compiler's hard-register-number (see above).  */
        !          1577: 
        !          1578: #define REGISTER_NAMES \
        !          1579:  {"0", "1", "2", "3", "4", "5", "6", "7",              \
        !          1580:   "8", "9", "10", "11", "12", "13", "14", "15",                \
        !          1581:   "16", "17", "18", "19", "20", "21", "22", "23",      \
        !          1582:   "24", "25", "26", "27", "28", "29", "30", "31",      \
        !          1583:   "0", "1", "2", "3", "4", "5", "6", "7",              \
        !          1584:   "8", "9", "10", "11", "12", "13", "14", "15",                \
        !          1585:   "16", "17", "18", "19", "20", "21", "22", "23",      \
        !          1586:   "24", "25", "26", "27", "28", "29", "30", "31",      \
        !          1587:   "mq", "lr", "ctr", "ap",                             \
        !          1588:   "0", "1", "2", "3", "4", "5", "6", "7" }
        !          1589: 
        !          1590: /* Table of additional register names to use in user input.  */
        !          1591: 
        !          1592: #define ADDITIONAL_REGISTER_NAMES \
        !          1593:  {"r0",    0, "r1",    1, "r2",    2, "r3",    3,      \
        !          1594:   "r4",    4, "r5",    5, "r6",    6, "r7",    7,      \
        !          1595:   "r8",    8, "r9",    9, "r10",  10, "r11",  11,      \
        !          1596:   "r12",  12, "r13",  13, "r14",  14, "r15",  15,      \
        !          1597:   "r16",  16, "r17",  17, "r18",  18, "r19",  19,      \
        !          1598:   "r20",  20, "r21",  21, "r22",  22, "r23",  23,      \
        !          1599:   "r24",  24, "r25",  25, "r26",  26, "r27",  27,      \
        !          1600:   "r28",  28, "r29",  29, "r30",  30, "r31",  31,      \
        !          1601:   "fr0",  32, "fr1",  33, "fr2",  34, "fr3",  35,      \
        !          1602:   "fr4",  36, "fr5",  37, "fr6",  38, "fr7",  39,      \
        !          1603:   "fr8",  40, "fr9",  41, "fr10", 42, "fr11", 43,      \
        !          1604:   "fr12", 44, "fr13", 45, "fr14", 46, "fr15", 47,      \
        !          1605:   "fr16", 48, "fr17", 49, "fr18", 50, "fr19", 51,      \
        !          1606:   "fr20", 52, "fr21", 53, "fr22", 54, "fr23", 55,      \
        !          1607:   "fr24", 56, "fr25", 57, "fr26", 58, "fr27", 59,      \
        !          1608:   "fr28", 60, "fr29", 61, "fr30", 62, "fr31", 63,      \
        !          1609:   /* no additional names for: mq, lr, ctr, ap */       \
        !          1610:   "cr0",  68, "cr1",  69, "cr2",  70, "cr3",  71,      \
        !          1611:   "cr4",  72, "cr5",  73, "cr6",  74, "cr7",  75 }
        !          1612: 
        !          1613: /* How to renumber registers for dbx and gdb.  */
        !          1614: 
        !          1615: #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
        !          1616: 
        !          1617: /* This is how to output the definition of a user-level label named NAME,
        !          1618:    such as the label on a static function or variable NAME.  */
        !          1619: 
        !          1620: #define ASM_OUTPUT_LABEL(FILE,NAME)    \
        !          1621:   do { RS6000_OUTPUT_BASENAME (FILE, NAME); fputs (":\n", FILE); } while (0)
        !          1622: 
        !          1623: /* This is how to output a command to make the user-level label named NAME
        !          1624:    defined for reference from other files.  */
        !          1625: 
        !          1626: #define ASM_GLOBALIZE_LABEL(FILE,NAME) \
        !          1627:   do { fputs ("\t.globl ", FILE);      \
        !          1628:        RS6000_OUTPUT_BASENAME (FILE, NAME); fputs ("\n", FILE);} while (0)
        !          1629: 
        !          1630: /* This is how to output a reference to a user-level label named NAME.
        !          1631:    `assemble_name' uses this.  */
        !          1632: 
        !          1633: #define ASM_OUTPUT_LABELREF(FILE,NAME) \
        !          1634:   fprintf (FILE, NAME)
        !          1635: 
        !          1636: /* This is how to output an internal numbered label where
        !          1637:    PREFIX is the class of label and NUM is the number within the class.  */
        !          1638: 
        !          1639: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)     \
        !          1640:   fprintf (FILE, "%s..%d:\n", PREFIX, NUM)
        !          1641: 
        !          1642: /* This is how to output a label for a jump table.  Arguments are the same as
        !          1643:    for ASM_OUTPUT_INTERNAL_LABEL, except the insn for the jump table is
        !          1644:    passed. */
        !          1645: 
        !          1646: #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN)       \
        !          1647: { ASM_OUTPUT_ALIGN (FILE, 2); ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); }
        !          1648: 
        !          1649: /* This is how to store into the string LABEL
        !          1650:    the symbol_ref name of an internal numbered label where
        !          1651:    PREFIX is the class of label and NUM is the number within the class.
        !          1652:    This is suitable for output with `assemble_name'.  */
        !          1653: 
        !          1654: #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)  \
        !          1655:   sprintf (LABEL, "%s..%d", PREFIX, NUM)
        !          1656: 
        !          1657: /* This is how to output an assembler line defining a `double' constant.  */
        !          1658: 
        !          1659: #define ASM_OUTPUT_DOUBLE(FILE,VALUE)          \
        !          1660:   fprintf (FILE, "\t.double 0d%.20e\n", (VALUE))
        !          1661: 
        !          1662: /* This is how to output an assembler line defining a `float' constant.  */
        !          1663: 
        !          1664: #define ASM_OUTPUT_FLOAT(FILE,VALUE)           \
        !          1665:   fprintf (FILE, "\t.float 0d%.20e\n", (VALUE))
        !          1666: 
        !          1667: /* This is how to output an assembler line defining an `int' constant.  */
        !          1668: 
        !          1669: #define ASM_OUTPUT_INT(FILE,VALUE)  \
        !          1670: ( fprintf (FILE, "\t.long "),                  \
        !          1671:   output_addr_const (FILE, (VALUE)),           \
        !          1672:   fprintf (FILE, "\n"))
        !          1673: 
        !          1674: /* Likewise for `char' and `short' constants.  */
        !          1675: 
        !          1676: #define ASM_OUTPUT_SHORT(FILE,VALUE)  \
        !          1677: ( fprintf (FILE, "\t.short "),                 \
        !          1678:   output_addr_const (FILE, (VALUE)),           \
        !          1679:   fprintf (FILE, "\n"))
        !          1680: 
        !          1681: #define ASM_OUTPUT_CHAR(FILE,VALUE)  \
        !          1682: ( fprintf (FILE, "\t.byte "),                  \
        !          1683:   output_addr_const (FILE, (VALUE)),           \
        !          1684:   fprintf (FILE, "\n"))
        !          1685: 
        !          1686: /* This is how to output an assembler line for a numeric constant byte.  */
        !          1687: 
        !          1688: #define ASM_OUTPUT_BYTE(FILE,VALUE)  \
        !          1689:   fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
        !          1690: 
        !          1691: /* This is how to output an assembler line to define N characters starting
        !          1692:    at P to FILE.  */
        !          1693: 
        !          1694: #define ASM_OUTPUT_ASCII(FILE, P, N)  output_ascii ((FILE), (P), (N))
        !          1695: 
        !          1696: /* This is how to output code to push a register on the stack.
        !          1697:    It need not be very fast code.  */
        !          1698: 
        !          1699: #define ASM_OUTPUT_REG_PUSH(FILE,REGNO)  \
        !          1700:   fprintf (FILE, "\tstu %s,-4(r1)\n", reg_names[REGNO]);
        !          1701: 
        !          1702: /* This is how to output an insn to pop a register from the stack.
        !          1703:    It need not be very fast code.  */
        !          1704: 
        !          1705: #define ASM_OUTPUT_REG_POP(FILE,REGNO)  \
        !          1706:   fprintf (FILE, "\tl %s,0(r1)\n\tai r1,r1,4\n", reg_names[REGNO])
        !          1707: 
        !          1708: /* This is how to output an element of a case-vector that is absolute. 
        !          1709:    (RS/6000 does not use such vectors, but we must define this macro
        !          1710:    anyway.)   */
        !          1711: 
        !          1712: #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
        !          1713:   fprintf (FILE, "\t.long L..%d\n", VALUE)
        !          1714: 
        !          1715: /* This is how to output an element of a case-vector that is relative.  */
        !          1716: 
        !          1717: #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL)     \
        !          1718:   fprintf (FILE, "\t.long L..%d-L..%d\n", VALUE, REL)
        !          1719: 
        !          1720: /* This is how to output an assembler line
        !          1721:    that says to advance the location counter
        !          1722:    to a multiple of 2**LOG bytes.  */
        !          1723: 
        !          1724: #define ASM_OUTPUT_ALIGN(FILE,LOG)     \
        !          1725:   if ((LOG) != 0)                      \
        !          1726:     fprintf (FILE, "\t.align %d\n", (LOG))
        !          1727: 
        !          1728: #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
        !          1729:   fprintf (FILE, "\t.space %d\n", (SIZE))
        !          1730: 
        !          1731: /* This says how to output an assembler line
        !          1732:    to define a global common symbol.  */
        !          1733: 
        !          1734: #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)   \
        !          1735:   do { fputs (".comm ", (FILE));                       \
        !          1736:        RS6000_OUTPUT_BASENAME ((FILE), (NAME));                \
        !          1737:        fprintf ((FILE), ",%d\n", (SIZE)); } while (0)
        !          1738: 
        !          1739: /* This says how to output an assembler line
        !          1740:    to define a local common symbol.  */
        !          1741: 
        !          1742: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE,ROUNDED)     \
        !          1743:   do { fputs (".lcomm ", (FILE));                      \
        !          1744:        RS6000_OUTPUT_BASENAME ((FILE), (NAME));                \
        !          1745:        fprintf ((FILE), ",%d,%s\n", (SIZE), rs6000_bss_section_name); \
        !          1746:      } while (0)
        !          1747: 
        !          1748: /* Store in OUTPUT a string (made with alloca) containing
        !          1749:    an assembler-name for a local static variable named NAME.
        !          1750:    LABELNO is an integer which is different for each call.  */
        !          1751: 
        !          1752: #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
        !          1753: ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10),   \
        !          1754:   sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
        !          1755: 
        !          1756: /* Define the parentheses used to group arithmetic operations
        !          1757:    in assembler code.  */
        !          1758: 
        !          1759: #define ASM_OPEN_PAREN "("
        !          1760: #define ASM_CLOSE_PAREN ")"
        !          1761: 
        !          1762: /* Define results of standard character escape sequences.  */
        !          1763: #define TARGET_BELL 007
        !          1764: #define TARGET_BS 010
        !          1765: #define TARGET_TAB 011
        !          1766: #define TARGET_NEWLINE 012
        !          1767: #define TARGET_VT 013
        !          1768: #define TARGET_FF 014
        !          1769: #define TARGET_CR 015
        !          1770: 
        !          1771: /* Print operand X (an rtx) in assembler syntax to file FILE.
        !          1772:    CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
        !          1773:    For `%' followed by punctuation, CODE is the punctuation and X is null.  */
        !          1774: 
        !          1775: #define PRINT_OPERAND(FILE, X, CODE)  print_operand (FILE, X, CODE)
        !          1776: 
        !          1777: /* Define which CODE values are valid.  */
        !          1778: 
        !          1779: #define PRINT_OPERAND_PUNCT_VALID_P(CODE)  0
        !          1780: 
        !          1781: /* Print a memory address as an operand to reference that memory location.  */
        !          1782: 
        !          1783: #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR)
        !          1784: 
        !          1785: /* Define the codes that are matched by predicates in rs6000.c.  */
        !          1786: 
        !          1787: #define PREDICATE_CODES \
        !          1788:   {"short_cint_operand", {CONST_INT}},                         \
        !          1789:   {"u_short_cint_operand", {CONST_INT}},                       \
        !          1790:   {"gen_reg_operand", {SUBREG, REG}},                          \
        !          1791:   {"cc_reg_operand", {SUBREG, REG}},                           \
        !          1792:   {"reg_or_short_operand", {SUBREG, REG, CONST_INT}},          \
        !          1793:   {"reg_or_neg_short_operand", {SUBREG, REG, CONST_INT}},      \
        !          1794:   {"reg_or_u_short_operand", {SUBREG, REG, CONST_INT}},                \
        !          1795:   {"reg_or_cint_operand", {SUBREG, REG, CONST_INT}},           \
        !          1796:   {"easy_fp_constant", {CONST_DOUBLE}},                                \
        !          1797:   {"reg_or_mem_operand", {SUBREG, MEM, REG}},                  \
        !          1798:   {"fp_reg_or_mem_operand", {SUBREG, MEM, REG}},               \
        !          1799:   {"mem_or_easy_const_operand", {SUBREG, MEM, CONST_DOUBLE}},  \
        !          1800:   {"add_operand", {SUBREG, REG, CONST_INT}},                   \
        !          1801:   {"and_operand", {SUBREG, REG, CONST_INT}},                   \
        !          1802:   {"logical_operand", {SUBREG, REG, CONST_INT}},               \
        !          1803:   {"mask_operand", {CONST_INT}},                               \
        !          1804:   {"call_operand", {SYMBOL_REF, REG}},                         \
        !          1805:   {"input_operand", {SUBREG, MEM, REG, CONST_INT}},            \
        !          1806:   {"branch_comparison_operation", {EQ, NE, LE, LT, GE,         \
        !          1807:                                   LT, LEU, LTU, GEU, GTU}},    \
        !          1808:   {"scc_comparison_operation", {EQ, NE, LE, LT, GE,            \
        !          1809:                                LT, LEU, LTU, GEU, GTU}},

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