Return to romp.h CVS log

Up to [Apple XNU] / GNUtools / cc / config / romp

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

1.1     ! root        1: /* Definitions of target machine for GNU compiler, for ROMP chip.
        !             2:    Copyright (C) 1989, 1991, 1993 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: /* Names to predefine in the preprocessor for this target machine.  */
        !            23: 
        !            24: #define CPP_PREDEFINES "-Dibm032 -Dunix -Asystem(unix) -Asystem(bsd)  -Acpu(ibm032) -Amachine(ibm032)"
        !            25: 
        !            26: /* Print subsidiary information on the compiler version in use.  */
        !            27: #define TARGET_VERSION ;
        !            28: 
        !            29: /* Add -lfp_p when running with -p or -pg.  */
        !            30: #define LIB_SPEC "%{pg:-lfp_p}%{p:-lfp_p} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}"
        !            31: 
        !            32: /* Run-time compilation parameters selecting different hardware subsets.  */
        !            33: 
        !            34: /* Flag to generate all multiplies as an in-line sequence of multiply-step
        !            35:    insns instead of calling a library routine.  */
        !            36: #define TARGET_IN_LINE_MUL (target_flags & 1)
        !            37: 
        !            38: /* Flag to generate padded floating-point data blocks.  Otherwise, we generate
        !            39:    them the minimum size.  This trades off execution speed against size.  */
        !            40: #define TARGET_FULL_FP_BLOCKS (target_flags & 2)
        !            41: 
        !            42: /* Flag to pass and return floating point values in floating point registers.
        !            43:    Since this violates the linkage convention, we feel free to destroy fr2
        !            44:    and fr3 on function calls.
        !            45:    fr1-fr3 are used to pass the arguments. */
        !            46: #define TARGET_FP_REGS (target_flags & 4)
        !            47: 
        !            48: /* Flag to return structures of more than one word in memory.  This is for
        !            49:    compatibility with the MetaWare HighC (hc) compiler.  */
        !            50: #define TARGET_HC_STRUCT_RETURN (target_flags & 010)
        !            51: 
        !            52: extern int target_flags;
        !            53: 
        !            54: /* Macro to define tables used to set the flags.
        !            55:    This is a list in braces of pairs in braces,
        !            56:    each pair being { "NAME", VALUE }
        !            57:    where VALUE is the bits to set or minus the bits to clear.
        !            58:    An empty string NAME is used to identify the default VALUE.  */
        !            59: 
        !            60: #define TARGET_SWITCHES                \
        !            61:   { {"in-line-mul", 1},                \
        !            62:     {"call-lib-mul", -1},      \
        !            63:     {"full-fp-blocks", 2},     \
        !            64:     {"minimum-fp-blocks", -2}, \
        !            65:     {"fp-arg-in-fpregs", 4},   \
        !            66:     {"fp-arg-in-gregs", -4},   \
        !            67:     {"hc-struct-return", 010},  \
        !            68:     {"nohc-struct-return", - 010}, \
        !            69:     { "", TARGET_DEFAULT}}
        !            70: 
        !            71: #define TARGET_DEFAULT 3
        !            72: 
        !            73: /* Define this to change the optimizations performed by default.
        !            74: 
        !            75:    This used to depend on the value of write_symbols,
        !            76:    but that is contrary to the general plan for GCC options.  */
        !            77: 
        !            78: #define OPTIMIZATION_OPTIONS(LEVEL)    \
        !            79: {                                      \
        !            80:   if ((LEVEL) > 0)                     \
        !            81:     {                                  \
        !            82:       flag_force_addr = 1;             \
        !            83:       flag_force_mem = 1;              \
        !            84:     }                                  \
        !            85: }
        !            86: 
        !            87: /* target machine storage layout */
        !            88: 
        !            89: /* Define this if most significant bit is lowest numbered
        !            90:    in instructions that operate on numbered bit-fields. */
        !            91: /* That is true on ROMP. */
        !            92: #define BITS_BIG_ENDIAN 1
        !            93: 
        !            94: /* Define this if most significant byte of a word is the lowest numbered.  */
        !            95: /* That is true on ROMP.  */
        !            96: #define BYTES_BIG_ENDIAN 1
        !            97: 
        !            98: /* Define this if most significant word of a multiword number is lowest
        !            99:    numbered. 
        !           100: 
        !           101:    For ROMP we can decide arbitrarily since there are no machine instructions
        !           102:    for them.  Might as well be consistent with bits and bytes. */
        !           103: #define WORDS_BIG_ENDIAN 1
        !           104: 
        !           105: /* number of bits in an addressable storage unit */
        !           106: #define BITS_PER_UNIT 8
        !           107: 
        !           108: /* Width in bits of a "word", which is the contents of a machine register.
        !           109:    Note that this is not necessarily the width of data type `int';
        !           110:    if using 16-bit ints on a 68000, this would still be 32.
        !           111:    But on a machine with 16-bit registers, this would be 16.  */
        !           112: #define BITS_PER_WORD 32
        !           113: 
        !           114: /* Width of a word, in units (bytes).  */
        !           115: #define UNITS_PER_WORD 4
        !           116: 
        !           117: /* Width in bits of a pointer.
        !           118:    See also the macro `Pmode' defined below.  */
        !           119: #define POINTER_SIZE 32
        !           120: 
        !           121: /* Allocation boundary (in *bits*) for storing arguments in argument list.  */
        !           122: #define PARM_BOUNDARY 32
        !           123: 
        !           124: /* Boundary (in *bits*) on which stack pointer should be aligned.  */
        !           125: #define STACK_BOUNDARY 32
        !           126: 
        !           127: /* Allocation boundary (in *bits*) for the code of a function.  */
        !           128: #define FUNCTION_BOUNDARY 16
        !           129: 
        !           130: /* No data type wants to be aligned rounder than this.  */
        !           131: #define BIGGEST_ALIGNMENT 32
        !           132: 
        !           133: /* Alignment of field after `int : 0' in a structure.  */
        !           134: #define EMPTY_FIELD_BOUNDARY 32
        !           135: 
        !           136: /* Every structure's size must be a multiple of this.  */
        !           137: #define STRUCTURE_SIZE_BOUNDARY 8
        !           138: 
        !           139: /* A bitfield declared as `int' forces `int' alignment for the struct.  */
        !           140: #define PCC_BITFIELD_TYPE_MATTERS 1
        !           141: 
        !           142: /* Make strings word-aligned so strcpy from constants will be faster.  */
        !           143: #define CONSTANT_ALIGNMENT(EXP, ALIGN)  \
        !           144:   (TREE_CODE (EXP) == STRING_CST       \
        !           145:    && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
        !           146: 
        !           147: /* Make arrays of chars word-aligned for the same reasons.  */
        !           148: #define DATA_ALIGNMENT(TYPE, ALIGN)            \
        !           149:   (TREE_CODE (TYPE) == ARRAY_TYPE              \
        !           150:    && TYPE_MODE (TREE_TYPE (TYPE)) == QImode   \
        !           151:    && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
        !           152: 
        !           153: /* Set this nonzero if move instructions will actually fail to work
        !           154:    when given unaligned data.  */
        !           155: #define STRICT_ALIGNMENT 1
        !           156: 
        !           157: /* Standard register usage.  */
        !           158: 
        !           159: /* Number of actual hardware registers.
        !           160:    The hardware registers are assigned numbers for the compiler
        !           161:    from 0 to just below FIRST_PSEUDO_REGISTER.
        !           162:    All registers that the compiler knows about must be given numbers,
        !           163:    even those that are not normally considered general registers.
        !           164: 
        !           165:    ROMP has 16 fullword registers and 8 floating point registers.
        !           166: 
        !           167:    In addition, the difference between the frame and argument pointers is
        !           168:    a function of the number of registers saved, so we need to have a register
        !           169:    to use for AP that will later be eliminated in favor of sp or fp.  This is
        !           170:    a normal register, but it is fixed.  */
        !           171: 
        !           172: #define FIRST_PSEUDO_REGISTER 25
        !           173: 
        !           174: /* 1 for registers that have pervasive standard uses
        !           175:    and are not available for the register allocator.
        !           176: 
        !           177:    On ROMP, r1 is used for the stack and r14 is used for a
        !           178:    data area pointer.
        !           179: 
        !           180:    HACK WARNING:  On the RT, there is a bug in code generation for
        !           181:    the MC68881 when the first and third operands are the same floating-point
        !           182:    register.  See the definition of the FINAL_PRESCAN_INSN macro for details.
        !           183:    Here we need to reserve fr0 for this purpose.  */
        !           184: #define FIXED_REGISTERS  \
        !           185:  {0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,      \
        !           186:   1,                                                   \
        !           187:   1, 0, 0, 0, 0, 0, 0, 0}
        !           188: 
        !           189: /* 1 for registers not available across function calls.
        !           190:    These must include the FIXED_REGISTERS and also any
        !           191:    registers that can be used without being saved.
        !           192:    The latter must include the registers where values are returned
        !           193:    and the register where structure-value addresses are passed.
        !           194:    Aside from that, you can include as many other registers as you like.  */
        !           195: #define CALL_USED_REGISTERS                            \
        !           196:  {1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,      \
        !           197:   1,                                                   \
        !           198:   1, 1, 0, 0, 0, 0, 0, 0}
        !           199: 
        !           200: /* List the order in which to allocate registers.  Each register must be
        !           201:    listed once, even those in FIXED_REGISTERS.
        !           202: 
        !           203:    We allocate in the following order:
        !           204:        fr0, fr1        (not saved)
        !           205:        fr2 ... fr6
        !           206:        fr7             (more expensive for some FPA's)
        !           207:        r0              (not saved and won't conflict with parameter register)
        !           208:        r4, r3, r2      (not saved, highest used first to make less conflict)
        !           209:        r5              (not saved, but forces r6 to be saved if DI/DFmode)
        !           210:        r15, r14, r13, r12, r11, r10, r9, r8, r7, r6 (less to save)
        !           211:        r1, ap                  */
        !           212: 
        !           213: #define REG_ALLOC_ORDER                \
        !           214:   {17, 18,                     \
        !           215:    19, 20, 21, 22, 23,         \
        !           216:    24,                         \
        !           217:    0,                          \
        !           218:    4, 3, 2,                    \
        !           219:    5,                          \
        !           220:    15, 14, 13, 12, 11, 10,     \
        !           221:    9, 8, 7, 6,                         \
        !           222:    1, 16}
        !           223: 
        !           224: /* True if register is floating-point.  */
        !           225: #define FP_REGNO_P(N) ((N) >= 17)
        !           226: 
        !           227: /* Return number of consecutive hard regs needed starting at reg REGNO
        !           228:    to hold something of mode MODE.
        !           229:    This is ordinarily the length in words of a value of mode MODE
        !           230:    but can be less for certain modes in special long registers.
        !           231: 
        !           232:    On ROMP, ordinary registers hold 32 bits worth;
        !           233:    a single floating point register is always enough for
        !           234:    anything that can be stored in them at all.  */
        !           235: #define HARD_REGNO_NREGS(REGNO, MODE)   \
        !           236:   (FP_REGNO_P (REGNO) ? GET_MODE_NUNITS (MODE) \
        !           237:    : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
        !           238: 
        !           239: /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
        !           240:    On ROMP, the cpu registers can hold any mode but the float registers
        !           241:    can hold only floating point. */
        !           242: #define HARD_REGNO_MODE_OK(REGNO, MODE) \
        !           243:   (! FP_REGNO_P (REGNO) || GET_MODE_CLASS (MODE) == MODE_FLOAT \
        !           244:    || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT)
        !           245: 
        !           246: /* Value is 1 if it is a good idea to tie two pseudo registers
        !           247:    when one has mode MODE1 and one has mode MODE2.
        !           248:    If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
        !           249:    for any hard reg, then this must be 0 for correct output.  */
        !           250: #define MODES_TIEABLE_P(MODE1, MODE2) \
        !           251:   ((GET_MODE_CLASS (MODE1) == MODE_FLOAT               \
        !           252:     || GET_MODE_CLASS (MODE1) == MODE_COMPLEX_FLOAT)   \
        !           253:    == (GET_MODE_CLASS (MODE2) == MODE_FLOAT            \
        !           254:        || GET_MODE_CLASS (MODE2) == MODE_COMPLEX_FLOAT))
        !           255: 
        !           256: /* A C expression returning the cost of moving data from a register of class
        !           257:    CLASS1 to one of CLASS2.
        !           258: 
        !           259:    On the ROMP, access to floating-point registers is expensive (even between
        !           260:    two FP regs.)  */
        !           261: #define REGISTER_MOVE_COST(CLASS1, CLASS2)     \
        !           262:   (2 + 10 * ((CLASS1) == FP_REGS) + 10 * (CLASS2 == FP_REGS))
        !           263: 
        !           264: /* Specify the registers used for certain standard purposes.
        !           265:    The values of these macros are register numbers.  */
        !           266: 
        !           267: /* ROMP pc isn't overloaded on a register that the compiler knows about.  */
        !           268: /* #define PC_REGNUM  */
        !           269: 
        !           270: /* Register to use for pushing function arguments.  */
        !           271: #define STACK_POINTER_REGNUM 1
        !           272: 
        !           273: /* Base register for access to local variables of the function.  */
        !           274: #define FRAME_POINTER_REGNUM 13
        !           275: 
        !           276: /* Value should be nonzero if functions must have frame pointers.
        !           277:    Zero means the frame pointer need not be set up (and parms
        !           278:    may be accessed via the stack pointer) in functions that seem suitable.
        !           279:    This is computed in `reload', in reload1.c.  */
        !           280: #define FRAME_POINTER_REQUIRED 0
        !           281: 
        !           282: /* Base register for access to arguments of the function.  */
        !           283: #define ARG_POINTER_REGNUM 16
        !           284: 
        !           285: /* Place to put static chain when calling a function that requires it.  */
        !           286: #define STATIC_CHAIN                                                   \
        !           287:   gen_rtx (MEM, Pmode, gen_rtx (PLUS, Pmode, stack_pointer_rtx,                \
        !           288:                                gen_rtx (CONST_INT, VOIDmode, -36)))
        !           289: 
        !           290: /* Place where static chain is found upon entry to routine.  */
        !           291: #define STATIC_CHAIN_INCOMING                                          \
        !           292:   gen_rtx (MEM, Pmode, gen_rtx (PLUS, Pmode, arg_pointer_rtx,          \
        !           293:                                gen_rtx (CONST_INT, VOIDmode, -20)))
        !           294: 
        !           295: /* Place that structure value return address is placed.
        !           296: 
        !           297:    On the ROMP, it is passed as an extra parameter.  */
        !           298: #define STRUCT_VALUE   0
        !           299: 
        !           300: /* Define the classes of registers for register constraints in the
        !           301:    machine description.  Also define ranges of constants.
        !           302: 
        !           303:    One of the classes must always be named ALL_REGS and include all hard regs.
        !           304:    If there is more than one class, another class must be named NO_REGS
        !           305:    and contain no registers.
        !           306: 
        !           307:    The name GENERAL_REGS must be the name of a class (or an alias for
        !           308:    another name such as ALL_REGS).  This is the class of registers
        !           309:    that is allowed by "g" or "r" in a register constraint.
        !           310:    Also, registers outside this class are allocated only when
        !           311:    instructions express preferences for them.
        !           312: 
        !           313:    The classes must be numbered in nondecreasing order; that is,
        !           314:    a larger-numbered class must never be contained completely
        !           315:    in a smaller-numbered class.
        !           316: 
        !           317:    For any two classes, it is very desirable that there be another
        !           318:    class that represents their union.  */
        !           319:    
        !           320: /* The ROMP has two types of registers, general and floating-point.
        !           321: 
        !           322:    However, r0 is special in that it cannot be used as a base register.
        !           323:    So make a class for registers valid as base registers.
        !           324: 
        !           325:    For floating-point support, add classes that just consist of r0 and
        !           326:    r15, respectively.  */
        !           327: 
        !           328: enum reg_class { NO_REGS, R0_REGS, R15_REGS, BASE_REGS, GENERAL_REGS,
        !           329:                 FP_REGS, ALL_REGS, LIM_REG_CLASSES };
        !           330: 
        !           331: #define N_REG_CLASSES (int) LIM_REG_CLASSES
        !           332: 
        !           333: /* Give names of register classes as strings for dump file.   */
        !           334: 
        !           335: #define REG_CLASS_NAMES \
        !           336:  {"NO_REGS", "R0_REGS", "R15_REGS", "BASE_REGS", "GENERAL_REGS", \
        !           337:   "FP_REGS", "ALL_REGS" }
        !           338: 
        !           339: /* Define which registers fit in which classes.
        !           340:    This is an initializer for a vector of HARD_REG_SET
        !           341:    of length N_REG_CLASSES.  */
        !           342: 
        !           343: #define REG_CLASS_CONTENTS {0, 0x00001, 0x08000, 0x1fffe, 0x1ffff,  \
        !           344:                            0x1fe0000, 0x1ffffff }
        !           345: 
        !           346: /* The same information, inverted:
        !           347:    Return the class number of the smallest class containing
        !           348:    reg number REGNO.  This could be a conditional expression
        !           349:    or could index an array.  */
        !           350: 
        !           351: #define REGNO_REG_CLASS(REGNO) \
        !           352:  ((REGNO) == 0 ? GENERAL_REGS : FP_REGNO_P (REGNO) ? FP_REGS : BASE_REGS)
        !           353: 
        !           354: /* The class value for index registers, and the one for base regs.  */
        !           355: #define INDEX_REG_CLASS BASE_REGS
        !           356: #define BASE_REG_CLASS BASE_REGS
        !           357: 
        !           358: /* Get reg_class from a letter such as appears in the machine description.  */
        !           359: 
        !           360: #define REG_CLASS_FROM_LETTER(C) \
        !           361:   ((C) == 'f' ? FP_REGS                \
        !           362:    : (C) == 'b' ? BASE_REGS    \
        !           363:    : (C) == 'z' ? R0_REGS      \
        !           364:    : (C) == 't' ? R15_REGS     \
        !           365:    : NO_REGS)
        !           366: 
        !           367: /* The letters I, J, K, L, M, N, and P in a register constraint string
        !           368:    can be used to stand for particular ranges of immediate operands.
        !           369:    This macro defines what the ranges are.
        !           370:    C is the letter, and VALUE is a constant value.
        !           371:    Return 1 if VALUE is in the range specified by C.
        !           372: 
        !           373:    `I' is constants less than 16
        !           374:    `J' is negative constants greater than -16
        !           375:    `K' is the range for a normal D insn.
        !           376:    `L' is a constant with only the low-order 16 bits set
        !           377:    `M' is a constant with only the high-order 16 bits set
        !           378:    `N' is a single-bit constant
        !           379:    `O' is a constant with either the high-order or low-order 16 bits all ones
        !           380:    `P' is the complement of a single-bit constant
        !           381:   */
        !           382: 
        !           383: #define CONST_OK_FOR_LETTER_P(VALUE, C)                   \
        !           384:    ( (C) == 'I' ? (unsigned) (VALUE) < 0x10               \
        !           385:    : (C) == 'J' ? (VALUE) < 0 && (VALUE) > -16            \
        !           386:    : (C) == 'K' ? (unsigned) ((VALUE) + 0x8000) < 0x10000  \
        !           387:    : (C) == 'L' ? ((VALUE) & 0xffff0000) == 0             \
        !           388:    : (C) == 'M' ? ((VALUE) & 0xffff) == 0                 \
        !           389:    : (C) == 'N' ? exact_log2 (VALUE) >= 0                 \
        !           390:    : (C) == 'O' ? ((VALUE) & 0xffff) == 0xffff            \
        !           391:                  || ((VALUE) & 0xffff0000) == 0xffff0000  \
        !           392:    : (C) == 'P' ? exact_log2 (~ (VALUE)) >= 0             \
        !           393:    : 0)
        !           394: 
        !           395: /* Similar, but for floating constants, and defining letters G and H.
        !           396:    Here VALUE is the CONST_DOUBLE rtx itself.
        !           397:    No floating-point constants on ROMP.  */
        !           398: 
        !           399: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)  0
        !           400: 
        !           401: /* Optional extra constraints for this machine.
        !           402: 
        !           403:    For the ROMP, `Q' means that this is a memory operand but not a symbolic
        !           404:    memory operand.  Note that an unassigned pseudo register is such a
        !           405:    memory operand.  If register allocation has not been done, we reject
        !           406:    pseudos, since we assume (hope) that they will get hard registers.
        !           407: 
        !           408:    `R' means that this is a constant pool reference to the current function.
        !           409:    This is just r14 and so can be treated as a register.  We bother with this
        !           410:    just in move insns as that is the only place it is likely to occur.
        !           411: 
        !           412:    `S' means that this is the address of a constant pool location.  This is
        !           413:    equal to r14 plus a constant.  We also only check for this in move insns. */
        !           414: 
        !           415: #define EXTRA_CONSTRAINT(OP, C)                                \
        !           416:   ((C) == 'Q' ?                                                \
        !           417:    ((GET_CODE (OP) == REG                              \
        !           418:      && REGNO (OP) >= FIRST_PSEUDO_REGISTER            \
        !           419:      && reg_renumber != 0                              \
        !           420:      && reg_renumber[REGNO (OP)] < 0)                  \
        !           421:     || (GET_CODE (OP) == MEM                           \
        !           422:         && ! symbolic_memory_operand (OP, VOIDmode)))  \
        !           423:    : (C) == 'R' ? current_function_operand (OP, VOIDmode) \
        !           424:    : (C) == 'S' ? constant_pool_address_operand (OP, VOIDmode) \
        !           425:    : 0)
        !           426: 
        !           427: /* Given an rtx X being reloaded into a reg required to be
        !           428:    in class CLASS, return the class of reg to actually use.
        !           429:    In general this is just CLASS; but on some machines
        !           430:    in some cases it is preferable to use a more restrictive class.
        !           431: 
        !           432:    For the ROMP, if X is a memory reference that involves a symbol,
        !           433:    we must use a BASE_REGS register instead of GENERAL_REGS
        !           434:    to do the reload. The argument of MEM be either REG, PLUS, or SYMBOL_REF
        !           435:    to be valid, so we assume that this is the case.
        !           436: 
        !           437:    Also, if X is an integer class, ensure that floating-point registers
        !           438:    aren't used.  */
        !           439: 
        !           440: #define PREFERRED_RELOAD_CLASS(X,CLASS)                                        \
        !           441:   ((CLASS) == FP_REGS && GET_MODE_CLASS (GET_MODE (X)) == MODE_INT     \
        !           442:    ? GENERAL_REGS :                                                    \
        !           443:    (CLASS) != GENERAL_REGS ? (CLASS) :                                 \
        !           444:    GET_CODE (X) != MEM ? GENERAL_REGS :                                        \
        !           445:    GET_CODE (XEXP (X, 0)) == SYMBOL_REF ? BASE_REGS :                  \
        !           446:    GET_CODE (XEXP (X, 0)) == LABEL_REF ? BASE_REGS :                   \
        !           447:    GET_CODE (XEXP (X, 0)) == CONST ? BASE_REGS :                       \
        !           448:    GET_CODE (XEXP (X, 0)) == REG ? GENERAL_REGS :                      \
        !           449:    GET_CODE (XEXP (X, 0)) != PLUS ? GENERAL_REGS :                     \
        !           450:    GET_CODE (XEXP (XEXP (X, 0), 1)) == SYMBOL_REF ? BASE_REGS :                \
        !           451:    GET_CODE (XEXP (XEXP (X, 0), 1)) == LABEL_REF ? BASE_REGS :         \
        !           452:    GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST ? BASE_REGS : GENERAL_REGS)
        !           453: 
        !           454: /* Return the register class of a scratch register needed to store into
        !           455:    OUT from a register of class CLASS in MODE.  
        !           456: 
        !           457:    On the ROMP, we cannot store into a symbolic memory address from an
        !           458:    integer register; we need a BASE_REGS register as a scratch to do it.  */
        !           459: 
        !           460: #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, OUT) \
        !           461:   (GET_MODE_CLASS (MODE) == MODE_INT && symbolic_memory_operand (OUT, MODE) \
        !           462:    ? BASE_REGS : NO_REGS)
        !           463: 
        !           464: /* Return the maximum number of consecutive registers
        !           465:    needed to represent mode MODE in a register of class CLASS.
        !           466: 
        !           467:    On ROMP, this is the size of MODE in words,
        !           468:    except in the FP regs, where a single reg is always enough.  */
        !           469: #define CLASS_MAX_NREGS(CLASS, MODE)   \
        !           470:  ((CLASS) == FP_REGS ? 1                       \
        !           471:   : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
        !           472: 
        !           473: /* Stack layout; function entry, exit and calling.  */
        !           474: 
        !           475: /* Define this if pushing a word on the stack
        !           476:    makes the stack pointer a smaller address.  */
        !           477: #define STACK_GROWS_DOWNWARD
        !           478: 
        !           479: /* Define this if the nominal address of the stack frame
        !           480:    is at the high-address end of the local variables;
        !           481:    that is, each additional local variable allocated
        !           482:    goes at a more negative offset in the frame.  */
        !           483: #define FRAME_GROWS_DOWNWARD
        !           484: 
        !           485: /* Offset within stack frame to start allocating local variables at.
        !           486:    If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
        !           487:    first local allocated.  Otherwise, it is the offset to the BEGINNING
        !           488:    of the first local allocated.
        !           489:    On the ROMP, if we set the frame pointer to 15 words below the highest
        !           490:    address of the highest local variable, the first 16 words will be
        !           491:    addressable via D-short insns. */
        !           492: #define STARTING_FRAME_OFFSET 64
        !           493: 
        !           494: /* If we generate an insn to push BYTES bytes,
        !           495:    this says how many the stack pointer really advances by.
        !           496:    On ROMP, don't define this because there are no push insns.  */
        !           497: /*  #define PUSH_ROUNDING(BYTES) */
        !           498: 
        !           499: /* Offset of first parameter from the argument pointer register value.
        !           500:    On the ROMP, we define the argument pointer to the start of the argument
        !           501:    area.  */
        !           502: #define FIRST_PARM_OFFSET(FNDECL) 0
        !           503: 
        !           504: /* Define this if stack space is still allocated for a parameter passed
        !           505:    in a register.  The value is the number of bytes.  */
        !           506: #define REG_PARM_STACK_SPACE(FNDECL) 16
        !           507: 
        !           508: /* This is the difference between the logical top of stack and the actual sp.
        !           509: 
        !           510:    For the ROMP, sp points past the words allocated for the first four outgoing
        !           511:    arguments (they are part of the callee's frame).  */
        !           512: #define STACK_POINTER_OFFSET -16
        !           513: 
        !           514: /* Define this if the maximum size of all the outgoing args is to be
        !           515:    accumulated and pushed during the prologue.  The amount can be
        !           516:    found in the variable current_function_outgoing_args_size.  */
        !           517: #define ACCUMULATE_OUTGOING_ARGS
        !           518: 
        !           519: /* Value is the number of bytes of arguments automatically
        !           520:    popped when returning from a subroutine call.
        !           521:    FUNTYPE is the data type of the function (as a tree),
        !           522:    or for a library call it is an identifier node for the subroutine name.
        !           523:    SIZE is the number of bytes of arguments passed on the stack.  */
        !           524: 
        !           525: #define RETURN_POPS_ARGS(FUNTYPE,SIZE) 0
        !           526: 
        !           527: /* Define how to find the value returned by a function.
        !           528:    VALTYPE is the data type of the value (as a tree).
        !           529:    If the precise function being called is known, FUNC is its FUNCTION_DECL;
        !           530:    otherwise, FUNC is 0.
        !           531: 
        !           532:    On ROMP the value is found in r2, unless the machine specific option
        !           533:    fp-arg-in-fpregs is selected, in which case FP return values are in fr1 */
        !           534: 
        !           535: #define FUNCTION_VALUE(VALTYPE, FUNC)  \
        !           536:   gen_rtx (REG, TYPE_MODE (VALTYPE),   \
        !           537:           (TARGET_FP_REGS &&           \
        !           538:            GET_MODE_CLASS (TYPE_MODE (VALTYPE)) == MODE_FLOAT) ? 18 : 2)
        !           539: 
        !           540: /* Define how to find the value returned by a library function
        !           541:    assuming the value has mode MODE.  */
        !           542: 
        !           543: #define LIBCALL_VALUE(MODE)  gen_rtx (REG, MODE, 2)
        !           544: 
        !           545: /* The definition of this macro implies that there are cases where
        !           546:    a scalar value cannot be returned in registers.
        !           547: 
        !           548:    For the ROMP, if compatibility with HC is required, anything of
        !           549:    type DImode is returned in memory.  */
        !           550: 
        !           551: #define RETURN_IN_MEMORY(type) \
        !           552:   (TYPE_MODE (type) == BLKmode \
        !           553:    || (TARGET_HC_STRUCT_RETURN && TYPE_MODE (type) == DImode))
        !           554: 
        !           555: /* 1 if N is a possible register number for a function value
        !           556:    as seen by the caller.
        !           557: 
        !           558:    On ROMP, r2 is the only register thus used unless fp values are to be
        !           559:    returned in fp regs, in which case fr1 is also used.  */
        !           560: 
        !           561: #define FUNCTION_VALUE_REGNO_P(N)  ((N) == 2 || ((N) == 18 && TARGET_FP_REGS))
        !           562: 
        !           563: /* 1 if N is a possible register number for function argument passing.
        !           564:    On ROMP, these are r2-r5 (and fr1-fr4 if fp regs are used).  */
        !           565: 
        !           566: #define FUNCTION_ARG_REGNO_P(N)        \
        !           567:   (((N) <= 5 && (N) >= 2) || (TARGET_FP_REGS && (N) > 17 && (N) < 21))
        !           568: 
        !           569: /* Define a data type for recording info about an argument list
        !           570:    during the scan of that argument list.  This data type should
        !           571:    hold all necessary information about the function itself
        !           572:    and about the args processed so far, enough to enable macros
        !           573:    such as FUNCTION_ARG to determine where the next arg should go.
        !           574: 
        !           575:    On the ROMP, this is a structure.  The first word is the number of
        !           576:    words of (integer only if -mfp-arg-in-fpregs is specified) arguments
        !           577:    scanned so far (including the invisible argument, if any, which holds
        !           578:    the structure-value-address).  The second word hold the corresponding
        !           579:    value for floating-point arguments, except that both single and double
        !           580:    count as one register.  */
        !           581: 
        !           582: struct rt_cargs {int gregs, fregs; };
        !           583: #define CUMULATIVE_ARGS struct rt_cargs 
        !           584: 
        !           585: #define USE_FP_REG(MODE,CUM)                                   \
        !           586:   (TARGET_FP_REGS && GET_MODE_CLASS (MODE) == MODE_FLOAT       \
        !           587:    && (CUM).fregs < 3)
        !           588: 
        !           589: /* Define intermediate macro to compute the size (in registers) of an argument
        !           590:    for the ROMP.  */
        !           591: 
        !           592: #define ROMP_ARG_SIZE(MODE, TYPE, NAMED)                               \
        !           593: (! (NAMED) ? 0                                                         \
        !           594:  : (MODE) != BLKmode                                                   \
        !           595:  ? (GET_MODE_SIZE (MODE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD      \
        !           596:  : (int_size_in_bytes (TYPE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD)
        !           597: 
        !           598: /* Initialize a variable CUM of type CUMULATIVE_ARGS
        !           599:    for a call to a function whose data type is FNTYPE.
        !           600:    For a library call, FNTYPE is 0.
        !           601: 
        !           602:    On ROMP, the offset normally starts at 0, but starts at 4 bytes
        !           603:    when the function gets a structure-value-address as an
        !           604:    invisible first argument.  */
        !           605: 
        !           606: #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME)       \
        !           607:   (CUM).gregs = 0,                             \
        !           608:   (CUM).fregs = 0
        !           609: 
        !           610: /* Update the data in CUM to advance over an argument
        !           611:    of mode MODE and data type TYPE.
        !           612:    (TYPE is null for libcalls where that information may not be available.)  */
        !           613: 
        !           614: #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)   \
        !           615: { if (NAMED)                                           \
        !           616:     {                                                  \
        !           617:       if (USE_FP_REG(MODE, CUM))                       \
        !           618:        (CUM).fregs++;                                  \
        !           619:       else                                             \
        !           620:        (CUM).gregs += ROMP_ARG_SIZE (MODE, TYPE, NAMED); \
        !           621:     }                                                  \
        !           622: }
        !           623: 
        !           624: /* Determine where to put an argument to a function.
        !           625:    Value is zero to push the argument on the stack,
        !           626:    or a hard register in which to store the argument.
        !           627: 
        !           628:    MODE is the argument's machine mode.
        !           629:    TYPE is the data type of the argument (as a tree).
        !           630:     This is null for libcalls where that information may
        !           631:     not be available.
        !           632:    CUM is a variable of type CUMULATIVE_ARGS which gives info about
        !           633:     the preceding args and about the function being called.
        !           634:    NAMED is nonzero if this argument is a named parameter
        !           635:     (otherwise it is an extra parameter matching an ellipsis).
        !           636: 
        !           637:    On ROMP the first four words of args are normally in registers
        !           638:    and the rest are pushed.  */
        !           639: 
        !           640: #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED)                           \
        !           641:   (! (NAMED) ? 0                                                       \
        !           642:    : ((TYPE) != 0 && TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST) ? 0  \
        !           643:    : USE_FP_REG(MODE,CUM) ? gen_rtx(REG, (MODE),(CUM.fregs) + 17)      \
        !           644:    : (CUM).gregs < 4 ? gen_rtx(REG, (MODE), 2 + (CUM).gregs) : 0)
        !           645: 
        !           646: /* For an arg passed partly in registers and partly in memory,
        !           647:    this is the number of registers used.
        !           648:    For args passed entirely in registers or entirely in memory, zero.  */
        !           649: 
        !           650: #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED)             \
        !           651:   (! (NAMED) ? 0                                                       \
        !           652:    : USE_FP_REG(MODE,CUM) ? 0                                          \
        !           653:    : (((CUM).gregs < 4                                                 \
        !           654:        && 4 < ((CUM).gregs + ROMP_ARG_SIZE (MODE, TYPE, NAMED)))       \
        !           655:       ? 4 - (CUM).gregs : 0))
        !           656: 
        !           657: /* Perform any needed actions needed for a function that is receiving a
        !           658:    variable number of arguments. 
        !           659: 
        !           660:    CUM is as above.
        !           661: 
        !           662:    MODE and TYPE are the mode and type of the current parameter.
        !           663: 
        !           664:    PRETEND_SIZE is a variable that should be set to the amount of stack
        !           665:    that must be pushed by the prolog to pretend that our caller pushed
        !           666:    it.
        !           667: 
        !           668:    Normally, this macro will push all remaining incoming registers on the
        !           669:    stack and set PRETEND_SIZE to the length of the registers pushed.  */
        !           670: 
        !           671: #define SETUP_INCOMING_VARARGS(CUM,MODE,TYPE,PRETEND_SIZE,NO_RTL)      \
        !           672: { if (TARGET_FP_REGS)                                                  \
        !           673:     error ("can't have varargs with -mfp-arg-in-fp-regs");             \
        !           674:   else if ((CUM).gregs < 4)                                            \
        !           675:     {                                                                  \
        !           676:       int first_reg_offset = (CUM).gregs;                              \
        !           677:                                                                        \
        !           678:       if (MUST_PASS_IN_STACK (MODE, TYPE))                             \
        !           679:        first_reg_offset += ROMP_ARG_SIZE (TYPE_MODE (TYPE), TYPE, 1);  \
        !           680:                                                                        \
        !           681:       if (first_reg_offset > 4)                                                \
        !           682:        first_reg_offset = 4;                                           \
        !           683:                                                                        \
        !           684:       if (! NO_RTL && first_reg_offset != 4)                           \
        !           685:        move_block_from_reg                                             \
        !           686:          (2 + first_reg_offset,                                        \
        !           687:           gen_rtx (MEM, BLKmode,                                       \
        !           688:                    plus_constant (virtual_incoming_args_rtx,           \
        !           689:                                   first_reg_offset * 4)),              \
        !           690:           4 - first_reg_offset, (4 - first_reg_offset) * UNITS_PER_WORD); \
        !           691:       PRETEND_SIZE = (4 - first_reg_offset) * UNITS_PER_WORD;          \
        !           692:     }                                                                  \
        !           693: }
        !           694: 
        !           695: /* This macro produces the initial definition of a function name.
        !           696:    On the ROMP, we need to place an extra '.' in the function name.  */
        !           697: 
        !           698: #define ASM_DECLARE_FUNCTION_NAME(FILE,NAME,DECL)      \
        !           699: { if (TREE_PUBLIC(DECL))                               \
        !           700:     fprintf (FILE, "\t.globl _.%s\n", NAME);           \
        !           701:   fprintf (FILE, "_.%s:\n", NAME);                     \
        !           702: }
        !           703: 
        !           704: /* This macro is used to output the start of the data area.
        !           705: 
        !           706:    On the ROMP, the _name is a pointer to the data area.  At that
        !           707:    location is the address of _.name, which is really the name of
        !           708:    the function.  We need to set all this up here.
        !           709: 
        !           710:    The global declaration of the data area, if needed, is done in 
        !           711:    `assemble_function', where it thinks it is globalizing the function
        !           712:    itself.  */
        !           713: 
        !           714: #define ASM_OUTPUT_POOL_PROLOGUE(FILE, NAME, DECL, SIZE)       \
        !           715: { extern int data_offset;                                      \
        !           716:   data_section ();                                             \
        !           717:   fprintf (FILE, "\t.align 2\n");                              \
        !           718:   ASM_OUTPUT_LABEL (FILE, NAME);                               \
        !           719:   fprintf (FILE, "\t.long _.%s, 0, ", NAME);                   \
        !           720:   if (current_function_calls_alloca)                           \
        !           721:     fprintf (FILE, "0x%x\n",                                   \
        !           722:             0xf6900000 + current_function_outgoing_args_size); \
        !           723:   else                                                         \
        !           724:     fprintf (FILE, "0\n");                                     \
        !           725:   data_offset = ((SIZE) + 12 + 3) / 4;                         \
        !           726: }
        !           727: 
        !           728: /* Select section for constant in constant pool.
        !           729: 
        !           730:    On ROMP, all constants are in the data area.  */
        !           731: 
        !           732: #define SELECT_RTX_SECTION(MODE, X)    data_section ()
        !           733: 
        !           734: /* This macro generates the assembly code for function entry.
        !           735:    FILE is a stdio stream to output the code to.
        !           736:    SIZE is an int: how many units of temporary storage to allocate.
        !           737:    Refer to the array `regs_ever_live' to determine which registers
        !           738:    to save; `regs_ever_live[I]' is nonzero if register number I
        !           739:    is ever used in the function.  This macro is responsible for
        !           740:    knowing which registers should not be saved even if used.  */
        !           741: 
        !           742: #define FUNCTION_PROLOGUE(FILE, SIZE) output_prolog (FILE, SIZE)
        !           743: 
        !           744: /* Output assembler code to FILE to increment profiler label # LABELNO
        !           745:    for profiling a function entry.  */
        !           746: 
        !           747: #define FUNCTION_PROFILER(FILE, LABELNO)       \
        !           748:   fprintf(FILE, "\tcas r0,r15,r0\n\tbali r15,mcount\n");
        !           749: 
        !           750: /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
        !           751:    the stack pointer does not matter.  The value is tested only in
        !           752:    functions that have frame pointers.
        !           753:    No definition is equivalent to always zero.  */
        !           754: /* #define EXIT_IGNORE_STACK   1       */
        !           755: 
        !           756: /* This macro generates the assembly code for function exit,
        !           757:    on machines that need it.  If FUNCTION_EPILOGUE is not defined
        !           758:    then individual return instructions are generated for each
        !           759:    return statement.  Args are same as for FUNCTION_PROLOGUE.
        !           760: 
        !           761:    The function epilogue should not depend on the current stack pointer!
        !           762:    It should use the frame pointer only.  This is mandatory because
        !           763:    of alloca; we also take advantage of it to omit stack adjustments
        !           764:    before returning.  */
        !           765: 
        !           766: #define FUNCTION_EPILOGUE(FILE, SIZE) output_epilog (FILE, SIZE)
        !           767: 
        !           768: /* Output assembler code for a block containing the constant parts
        !           769:    of a trampoline, leaving space for the variable parts.
        !           770: 
        !           771:    The trampoline should set the static chain pointer to value placed
        !           772:    into the trampoline and should branch to the specified routine.
        !           773: 
        !           774:    On the ROMP, we have a problem.  There are no free registers to use
        !           775:    to construct the static chain and function addresses.  Hence we use
        !           776:    the following kludge:  r15 (the return address) is first saved in mq.
        !           777:    Then we use r15 to form the function address.  We then branch to the
        !           778:    function and restore r15 in the delay slot.  This makes it appear that
        !           779:    the function was called directly from the caller.
        !           780: 
        !           781:    (Note that the function address built is actually that of the data block.
        !           782:    This is passed in r0 and the actual routine address is loaded into r15.)
        !           783: 
        !           784:    In addition, note that the address of the "called function", in this case
        !           785:    the trampoline, is actually the address of the data area.  So we need to
        !           786:    make a fake data area that will contain the address of the trampoline.
        !           787:    Note that this must be defined as two half-words, since the trampoline
        !           788:    template (as opposed to the trampoline on the stack) is only half-word
        !           789:    aligned.  */
        !           790: 
        !           791: #define TRAMPOLINE_TEMPLATE(FILE)      \
        !           792: {                                      \
        !           793:   fprintf (FILE, "\t.short 0,0\n");    \
        !           794:   fprintf (FILE, "\tcau r0,0(r0)\n");  \
        !           795:   fprintf (FILE, "\toil r0,r0,0\n");   \
        !           796:   fprintf (FILE, "\tmts r10,r15\n");   \
        !           797:   fprintf (FILE, "\tst r0,-36(r1)\n"); \
        !           798:   fprintf (FILE, "\tcau r15,0(r0)\n"); \
        !           799:   fprintf (FILE, "\toil r15,r15,0\n"); \
        !           800:   fprintf (FILE, "\tcas r0,r15,r0\n"); \
        !           801:   fprintf (FILE, "\tls r15,0(r15)\n"); \
        !           802:   fprintf (FILE, "\tbrx r15\n");       \
        !           803:   fprintf (FILE, "\tmfs r10,r15\n");   \
        !           804: }
        !           805: 
        !           806: /* Length in units of the trampoline for entering a nested function.  */
        !           807: 
        !           808: #define TRAMPOLINE_SIZE    36
        !           809: 
        !           810: /* Emit RTL insns to initialize the variable parts of a trampoline.
        !           811:    FNADDR is an RTX for the address of the function's pure code.
        !           812:    CXT is an RTX for the static chain value for the function.
        !           813: 
        !           814:    On the RT, the static chain and function addresses are written in
        !           815:    two 16-bit sections.
        !           816: 
        !           817:    We also need to write the address of the first instruction in
        !           818:    the trampoline into the first word of the trampoline to simulate a
        !           819:    data area.  */
        !           820: 
        !           821: #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, CXT)               \
        !           822: {                                                              \
        !           823:   rtx _addr, _temp;                                            \
        !           824:   rtx _val;                                                    \
        !           825:                                                                \
        !           826:   _temp = expand_binop (SImode, add_optab, ADDR,               \
        !           827:                        gen_rtx (CONST_INT, VOIDmode, 4),       \
        !           828:                        0, 1, OPTAB_LIB_WIDEN);                 \
        !           829:   emit_move_insn (gen_rtx (MEM, SImode,                                \
        !           830:                           memory_address (SImode, ADDR)), _temp); \
        !           831:                                                                \
        !           832:   _val = force_reg (SImode, CXT);                              \
        !           833:   _addr = memory_address (HImode, plus_constant (ADDR, 10));   \
        !           834:   emit_move_insn (gen_rtx (MEM, HImode, _addr),                        \
        !           835:                  gen_lowpart (HImode, _val));                  \
        !           836:   _temp = expand_shift (RSHIFT_EXPR, SImode, _val,             \
        !           837:                        build_int_2 (16, 0), 0, 1);             \
        !           838:   _addr = memory_address (HImode, plus_constant (ADDR, 6));    \
        !           839:   emit_move_insn (gen_rtx (MEM, HImode, _addr),                        \
        !           840:                  gen_lowpart (HImode, _temp));                 \
        !           841:                                                                \
        !           842:   _val = force_reg (SImode, FNADDR);                           \
        !           843:   _addr = memory_address (HImode, plus_constant (ADDR, 24));   \
        !           844:   emit_move_insn (gen_rtx (MEM, HImode, _addr),                        \
        !           845:                  gen_lowpart (HImode, _val));                  \
        !           846:   _temp = expand_shift (RSHIFT_EXPR, SImode, _val,             \
        !           847:                        build_int_2 (16, 0), 0, 1);             \
        !           848:   _addr = memory_address (HImode, plus_constant (ADDR, 20));   \
        !           849:   emit_move_insn (gen_rtx (MEM, HImode, _addr),                        \
        !           850:                  gen_lowpart (HImode, _temp));                 \
        !           851:                                                                \
        !           852: }
        !           853: 
        !           854: /* Definitions for register eliminations.
        !           855: 
        !           856:    We have two registers that can be eliminated on the ROMP.  First, the
        !           857:    frame pointer register can often be eliminated in favor of the stack
        !           858:    pointer register.  Secondly, the argument pointer register can always be
        !           859:    eliminated; it is replaced with either the stack or frame pointer.
        !           860: 
        !           861:    In addition, we use the elimination mechanism to see if r14 is needed.
        !           862:    Initially we assume that it isn't.  If it is, we spill it.  This is done
        !           863:    by making it an eliminable register.  It doesn't matter what we replace
        !           864:    it with, since it will never occur in the rtl at this point.  */
        !           865: 
        !           866: /* This is an array of structures.  Each structure initializes one pair
        !           867:    of eliminable registers.  The "from" register number is given first,
        !           868:    followed by "to".  Eliminations of the same "from" register are listed
        !           869:    in order of preference.  */
        !           870: #define ELIMINABLE_REGS                                \
        !           871: {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM},        \
        !           872:  { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM},  \
        !           873:  { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},  \
        !           874:  { 14, 0}}
        !           875: 
        !           876: /* Given FROM and TO register numbers, say whether this elimination is allowed.
        !           877:    Frame pointer elimination is automatically handled.
        !           878: 
        !           879:    For the ROMP, if frame pointer elimination is being done, we would like to
        !           880:    convert ap into fp, not sp.
        !           881: 
        !           882:    We need r14 if various conditions (tested in romp_using_r14) are true.
        !           883: 
        !           884:    All other eliminations are valid.  */
        !           885: #define CAN_ELIMINATE(FROM, TO)                                        \
        !           886:  ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \
        !           887:   ? ! frame_pointer_needed                                     \
        !           888:   : (FROM) == 14 ? ! romp_using_r14 ()                         \
        !           889:   : 1)
        !           890: 
        !           891: /* Define the offset between two registers, one to be eliminated, and the other
        !           892:    its replacement, at the start of a routine.  */
        !           893: #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                   \
        !           894: { if ((FROM) == FRAME_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM)  \
        !           895:     {                                                                  \
        !           896:       if (romp_pushes_stack ())                                                \
        !           897:        (OFFSET) = ((get_frame_size () - 64)                            \
        !           898:                    + current_function_outgoing_args_size);             \
        !           899:       else                                                             \
        !           900:        (OFFSET) = - (romp_sa_size () + 64);                            \
        !           901:     }                                                                  \
        !           902:   else if ((FROM) == ARG_POINTER_REGNUM && (TO) == FRAME_POINTER_REGNUM) \
        !           903:     (OFFSET) = romp_sa_size () - 16 + 64;                              \
        !           904:   else if ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \
        !           905:     {                                                                  \
        !           906:       if (romp_pushes_stack ())                                                \
        !           907:        (OFFSET) = (get_frame_size () + (romp_sa_size () - 16)          \
        !           908:                    + current_function_outgoing_args_size);             \
        !           909:       else                                                             \
        !           910:        (OFFSET) = -16;                                                 \
        !           911:     }                                                                  \
        !           912:   else if ((FROM) == 14)                                               \
        !           913:     (OFFSET) = 0;                                                      \
        !           914:   else                                                                 \
        !           915:     abort ();                                                          \
        !           916: }
        !           917: 
        !           918: /* Addressing modes, and classification of registers for them.  */
        !           919: 
        !           920: /* #define HAVE_POST_INCREMENT */
        !           921: /* #define HAVE_POST_DECREMENT */
        !           922: 
        !           923: /* #define HAVE_PRE_DECREMENT */
        !           924: /* #define HAVE_PRE_INCREMENT */
        !           925: 
        !           926: /* Macros to check register numbers against specific register classes.  */
        !           927: 
        !           928: /* These assume that REGNO is a hard or pseudo reg number.
        !           929:    They give nonzero only if REGNO is a hard reg of the suitable class
        !           930:    or a pseudo reg currently allocated to a suitable hard reg.
        !           931:    Since they use reg_renumber, they are safe only once reg_renumber
        !           932:    has been allocated, which happens in local-alloc.c.  */
        !           933: 
        !           934: #define REGNO_OK_FOR_INDEX_P(REGNO) 0
        !           935: #define REGNO_OK_FOR_BASE_P(REGNO)                             \
        !           936: ((REGNO) < FIRST_PSEUDO_REGISTER                               \
        !           937:  ? (REGNO) < 16 && (REGNO) != 0 && (REGNO) != 16               \
        !           938:  : (reg_renumber[REGNO] < 16 && reg_renumber[REGNO] >= 0       \
        !           939:     && reg_renumber[REGNO] != 16))
        !           940: 
        !           941: /* Maximum number of registers that can appear in a valid memory address.  */
        !           942: 
        !           943: #define MAX_REGS_PER_ADDRESS 1
        !           944: 
        !           945: /* Recognize any constant value that is a valid address.  */
        !           946: 
        !           947: #define CONSTANT_ADDRESS_P(X)   \
        !           948:   (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF             \
        !           949:    || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST               \
        !           950:    || GET_CODE (X) == HIGH)
        !           951: 
        !           952: /* Nonzero if the constant value X is a legitimate general operand.
        !           953:    It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.
        !           954: 
        !           955:    On the ROMP, there is a bit of a hack here.  Basically, we wish to
        !           956:    only issue instructions that are not `as' macros.  However, in the
        !           957:    case of `get', `load', and `store', if the operand is a relocatable
        !           958:    symbol (possibly +/- an integer), there is no way to express the
        !           959:    resulting split-relocation except with the macro.  Therefore, allow
        !           960:    either a constant valid in a normal (sign-extended) D-format insn or
        !           961:    a relocatable expression.
        !           962: 
        !           963:    Also, for DFmode and DImode, we must ensure that both words are
        !           964:    addressable.
        !           965: 
        !           966:    We define two macros: The first is given an offset (0 or 4) and indicates
        !           967:    that the operand is a CONST_INT that is valid for that offset.  The second
        !           968:    indicates a valid non-CONST_INT constant.  */
        !           969: 
        !           970: #define LEGITIMATE_ADDRESS_INTEGER_P(X,OFFSET)                         \
        !           971:   (GET_CODE (X) == CONST_INT                                           \
        !           972:    && (unsigned) (INTVAL (X) + (OFFSET) + 0x8000) < 0x10000)
        !           973: 
        !           974: #define LEGITIMATE_ADDRESS_CONSTANT_P(X)                               \
        !           975:  (GET_CODE (X) == SYMBOL_REF                                           \
        !           976:   || GET_CODE (X) == LABEL_REF                                         \
        !           977:   || (GET_CODE (X) == CONST                                            \
        !           978:       && (GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF               \
        !           979:           || GET_CODE (XEXP (XEXP (X, 0), 0)) == LABEL_REF)            \
        !           980:       && GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT))
        !           981: 
        !           982: /* Include all constant integers and constant double, but exclude 
        !           983:    SYMBOL_REFs that are to be obtained from the data area (see below).  */
        !           984: #define LEGITIMATE_CONSTANT_P(X)               \
        !           985:   ((LEGITIMATE_ADDRESS_CONSTANT_P (X)          \
        !           986:     || GET_CODE (X) == CONST_INT               \
        !           987:     || GET_CODE (X) == CONST_DOUBLE)           \
        !           988:    && ! (GET_CODE (X) == SYMBOL_REF && SYMBOL_REF_FLAG (X)))
        !           989: 
        !           990: /* For no good reason, we do the same as the other RT compilers and load
        !           991:    the addresses of data areas for a function from our data area.  That means
        !           992:    that we need to mark such SYMBOL_REFs.  We do so here.  */
        !           993: #define ENCODE_SECTION_INFO(DECL)                      \
        !           994:   if (TREE_CODE (TREE_TYPE (DECL)) == FUNCTION_TYPE)   \
        !           995:     SYMBOL_REF_FLAG (XEXP (DECL_RTL (DECL), 0)) = 1;
        !           996: 
        !           997: /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
        !           998:    and check its validity for a certain class.
        !           999:    We have two alternate definitions for each of them.
        !          1000:    The usual definition accepts all pseudo regs; the other rejects
        !          1001:    them unless they have been allocated suitable hard regs.
        !          1002:    The symbol REG_OK_STRICT causes the latter definition to be used.
        !          1003: 
        !          1004:    Most source files want to accept pseudo regs in the hope that
        !          1005:    they will get allocated to the class that the insn wants them to be in.
        !          1006:    Source files for reload pass need to be strict.
        !          1007:    After reload, it makes no difference, since pseudo regs have
        !          1008:    been eliminated by then.  */
        !          1009: 
        !          1010: #ifndef REG_OK_STRICT
        !          1011: 
        !          1012: /* Nonzero if X is a hard reg that can be used as an index
        !          1013:    or if it is a pseudo reg.  */
        !          1014: #define REG_OK_FOR_INDEX_P(X) 0
        !          1015: /* Nonzero if X is a hard reg that can be used as a base reg
        !          1016:    or if it is a pseudo reg.  */
        !          1017: #define REG_OK_FOR_BASE_P(X)           \
        !          1018:   (REGNO (X) != 0 && (REGNO (X) < 17 || REGNO (X) >= FIRST_PSEUDO_REGISTER))
        !          1019: 
        !          1020: #else
        !          1021: 
        !          1022: /* Nonzero if X is a hard reg that can be used as an index.  */
        !          1023: #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
        !          1024: /* Nonzero if X is a hard reg that can be used as a base reg.  */
        !          1025: #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
        !          1026: 
        !          1027: #endif
        !          1028: 
        !          1029: /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
        !          1030:    that is a valid memory address for an instruction.
        !          1031:    The MODE argument is the machine mode for the MEM expression
        !          1032:    that wants to use this address.
        !          1033: 
        !          1034:    On the ROMP, a legitimate address is either a legitimate constant,
        !          1035:    a register plus a legitimate constant, or a register.  See the
        !          1036:    discussion at the LEGITIMATE_ADDRESS_CONSTANT_P macro.  */
        !          1037: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR)                                \
        !          1038: { if (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X))                    \
        !          1039:     goto ADDR;                                                         \
        !          1040:   if (GET_CODE (X) != CONST_INT && LEGITIMATE_ADDRESS_CONSTANT_P (X))  \
        !          1041:     goto ADDR;                                                         \
        !          1042:   if (GET_CODE (X) == PLUS                                             \
        !          1043:       && GET_CODE (XEXP (X, 0)) == REG                                 \
        !          1044:       && REG_OK_FOR_BASE_P (XEXP (X, 0))                               \
        !          1045:       && LEGITIMATE_ADDRESS_CONSTANT_P (XEXP (X, 1)))                  \
        !          1046:        goto ADDR;                                                      \
        !          1047:   if (GET_CODE (X) == PLUS                                             \
        !          1048:       && GET_CODE (XEXP (X, 0)) == REG                                 \
        !          1049:       && REG_OK_FOR_BASE_P (XEXP (X, 0))                               \
        !          1050:       && LEGITIMATE_ADDRESS_INTEGER_P (XEXP (X, 1), 0)                 \
        !          1051:       && (((MODE) != DFmode && (MODE) != DImode)                       \
        !          1052:          || (LEGITIMATE_ADDRESS_INTEGER_P (XEXP (X, 1), 4))))          \
        !          1053:        goto ADDR;                                                      \
        !          1054: }
        !          1055: 
        !          1056: /* Try machine-dependent ways of modifying an illegitimate address
        !          1057:    to be legitimate.  If we find one, return the new, valid address.
        !          1058:    This macro is used in only one place: `memory_address' in explow.c.
        !          1059: 
        !          1060:    OLDX is the address as it was before break_out_memory_refs was called.
        !          1061:    In some cases it is useful to look at this to decide what needs to be done.
        !          1062: 
        !          1063:    MODE and WIN are passed so that this macro can use
        !          1064:    GO_IF_LEGITIMATE_ADDRESS.
        !          1065: 
        !          1066:    It is always safe for this macro to do nothing.  It exists to recognize
        !          1067:    opportunities to optimize the output.
        !          1068: 
        !          1069:    On ROMP, check for the sum of a register with a constant
        !          1070:    integer that is out of range.  If so, generate code to add the
        !          1071:    constant with the low-order 16 bits masked to the register and force
        !          1072:    this result into another register (this can be done with `cau').
        !          1073:    Then generate an address of REG+(CONST&0xffff), allowing for the 
        !          1074:    possibility of bit 16 being a one.
        !          1075: 
        !          1076:    If the register is not OK for a base register, abort.  */
        !          1077: 
        !          1078: #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN)                    \
        !          1079: { if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == REG    \
        !          1080:     && GET_CODE (XEXP (X, 1)) == CONST_INT                     \
        !          1081:     && (unsigned) (INTVAL (XEXP (X, 1)) + 0x8000) >= 0x10000)  \
        !          1082:     { int high_int, low_int;                                   \
        !          1083:       if (! REG_OK_FOR_BASE_P (XEXP (X, 0)))                   \
        !          1084:        abort ();                                               \
        !          1085:       high_int = INTVAL (XEXP (X, 1)) >> 16;                   \
        !          1086:       low_int = INTVAL (XEXP (X, 1)) & 0xffff;                 \
        !          1087:       if (low_int & 0x8000)                                    \
        !          1088:        high_int += 1, low_int |= 0xffff0000;                   \
        !          1089:       (X) = gen_rtx (PLUS, SImode,                             \
        !          1090:                     force_operand                              \
        !          1091:                        (gen_rtx (PLUS, SImode, XEXP (X, 0), \
        !          1092:                                  gen_rtx (CONST_INT, VOIDmode, \
        !          1093:                                                      high_int << 16)), 0),\
        !          1094:                     gen_rtx (CONST_INT, VOIDmode, low_int));   \
        !          1095:     }                                                          \
        !          1096: }
        !          1097: 
        !          1098: /* Go to LABEL if ADDR (a legitimate address expression)
        !          1099:    has an effect that depends on the machine mode it is used for.
        !          1100: 
        !          1101:    On the ROMP this is true only if the address is valid with a zero offset
        !          1102:    but not with an offset of four (this means it cannot be used as an
        !          1103:    address for DImode or DFmode).  Since we know it is valid, we just check
        !          1104:    for an address that is not valid with an offset of four.  */
        !          1105: 
        !          1106: #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)               \
        !          1107: { if (GET_CODE (ADDR) == PLUS                                  \
        !          1108:       && ! LEGITIMATE_ADDRESS_CONSTANT_P (XEXP (ADDR, 1))      \
        !          1109:       && ! LEGITIMATE_ADDRESS_INTEGER_P (XEXP (ADDR, 1), 4))   \
        !          1110:     goto LABEL;                                                        \
        !          1111: }
        !          1112: 
        !          1113: /* Define this if some processing needs to be done immediately before
        !          1114:    emitting code for an insn.
        !          1115: 
        !          1116:    This is used on the ROMP, to compensate for a bug in the floating-point
        !          1117:    code.  When a floating-point operation is done with the first and third
        !          1118:    operands both the same floating-point register, it will generate bad code
        !          1119:    for the MC68881.  So we must detect this.  If it occurs, we patch the 
        !          1120:    first operand to be fr0 and insert a move insn to move it to the desired
        !          1121:    destination.  */
        !          1122: #define FINAL_PRESCAN_INSN(INSN,OPERANDS,NOPERANDS)                    \
        !          1123:   { rtx op0, op1, op2, operation, tem;                                 \
        !          1124:     if (NOPERANDS >= 3 && get_attr_type (INSN) == TYPE_FP)             \
        !          1125:       {                                                                        \
        !          1126:        op0 = OPERANDS[0];                                              \
        !          1127:        operation = OPERANDS[1];                                        \
        !          1128:        if (float_conversion (operation, VOIDmode))                     \
        !          1129:          operation = XEXP (operation, 0);                              \
        !          1130:         if (float_binary (operation, VOIDmode))                                \
        !          1131:          {                                                             \
        !          1132:            op1 = XEXP (operation, 0), op2 = XEXP (operation, 1);       \
        !          1133:            if (float_conversion (op1, VOIDmode))                       \
        !          1134:              op1 = XEXP (op1, 0);                                      \
        !          1135:            if (float_conversion (op2, VOIDmode))                       \
        !          1136:              op2 = XEXP (op2, 0);                                      \
        !          1137:            if (rtx_equal_p (op0, op2)                                  \
        !          1138:                && (GET_CODE (operation) == PLUS                        \
        !          1139:                    || GET_CODE (operation) == MULT))                   \
        !          1140:              tem = op1, op1 = op2, op2 = tem;                          \
        !          1141:            if (GET_CODE (op0) == REG && FP_REGNO_P (REGNO (op0))       \
        !          1142:                && GET_CODE (op2) == REG && FP_REGNO_P (REGNO (op2))    \
        !          1143:                && REGNO (op0) == REGNO (op2))                          \
        !          1144:              {                                                         \
        !          1145:                tem = gen_rtx (REG, GET_MODE (op0), 17);                \
        !          1146:                emit_insn_after (gen_move_insn (op0, tem), INSN);       \
        !          1147:                SET_DEST (XVECEXP (PATTERN (INSN), 0, 0)) = tem;        \
        !          1148:                OPERANDS[0] = tem;                                      \
        !          1149:              }                                                         \
        !          1150:          }                                                             \
        !          1151:       }                                                                        \
        !          1152:   }
        !          1153: 
        !          1154: /* Specify the machine mode that this machine uses
        !          1155:    for the index in the tablejump instruction.  */
        !          1156: #define CASE_VECTOR_MODE SImode
        !          1157: 
        !          1158: /* Define this if the tablejump instruction expects the table
        !          1159:    to contain offsets from the address of the table.
        !          1160:    Do not define this if the table should contain absolute addresses.  */
        !          1161: /* #define CASE_VECTOR_PC_RELATIVE */
        !          1162: 
        !          1163: /* Specify the tree operation to be used to convert reals to integers.  */
        !          1164: #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
        !          1165: 
        !          1166: /* This is the kind of divide that is easiest to do in the general case.  */
        !          1167: #define EASY_DIV_EXPR TRUNC_DIV_EXPR
        !          1168: 
        !          1169: /* Define this as 1 if `char' should by default be signed; else as 0.  */
        !          1170: #define DEFAULT_SIGNED_CHAR 0
        !          1171: 
        !          1172: /* This flag, if defined, says the same insns that convert to a signed fixnum
        !          1173:    also convert validly to an unsigned one.
        !          1174: 
        !          1175:    We actually lie a bit here as overflow conditions are different.  But
        !          1176:    they aren't being checked anyway.  */
        !          1177: 
        !          1178: #define FIXUNS_TRUNC_LIKE_FIX_TRUNC
        !          1179: 
        !          1180: /* Max number of bytes we can move from memory to memory
        !          1181:    in one reasonably fast instruction.  */
        !          1182: #define MOVE_MAX 4
        !          1183: 
        !          1184: /* Nonzero if access to memory by bytes is no faster than for words.
        !          1185:    Also non-zero if doing byte operations (specifically shifts) in registers
        !          1186:    is undesirable.  */
        !          1187: #define SLOW_BYTE_ACCESS 1
        !          1188: 
        !          1189: /* Define if operations between registers always perform the operation
        !          1190:    on the full register even if a narrower mode is specified.  */
        !          1191: #define WORD_REGISTER_OPERATIONS
        !          1192: 
        !          1193: /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD
        !          1194:    will either zero-extend or sign-extend.  The value of this macro should
        !          1195:    be the code that says which one of the two operations is implicitly
        !          1196:    done, NIL if none.  */
        !          1197: #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND
        !          1198: 
        !          1199: /* This is BSD, so it wants DBX format.  */
        !          1200: #define DBX_DEBUGGING_INFO
        !          1201: 
        !          1202: /* Define the letter code used in a stabs entry for parameters passed
        !          1203:    with the register attribute.
        !          1204: 
        !          1205:    GCC's default value, 'P', is used by dbx to refers to an external
        !          1206:    procedure. The section 5 manual page for dbx implies that 'R' would be the
        !          1207:    right letter, but dbx 1.5 has a bug in it that precludes its use.
        !          1208:    Probably that is why neither hc or pcc use this. pcc puts in two
        !          1209:    stabs entries: one for the parameter location and one for the register
        !          1210:    location. The letter `r' (register)
        !          1211:    would be okay, but it loses parameter attribute of the stabs entry.  */
        !          1212: #define DBX_REGPARM_STABS_LETTER 'R'
        !          1213: 
        !          1214: /* A C expression for the integer offset value of an automatic variable
        !          1215:    (N_LSYM) having address X (an RTX). This gets used in .stabs entries
        !          1216:    for the local variables. Compare with the default definition.  */
        !          1217: extern int romp_debugger_auto_correction();
        !          1218: #define DEBUGGER_AUTO_OFFSET(X)                        \
        !          1219:   (GET_CODE (X) == PLUS                                \
        !          1220:    ? romp_debugger_auto_correction (INTVAL (XEXP (X, 1)) ) \
        !          1221:    : 0 )
        !          1222: 
        !          1223: /* A C expression for the integer offset value of an argument (N_PSYM)
        !          1224:    having address X (an RTX).  The nominal offset is OFFSET.  */
        !          1225: extern int romp_debugger_arg_correction();
        !          1226: #define DEBUGGER_ARG_OFFSET(OFFSET, X)             \
        !          1227:   romp_debugger_arg_correction (OFFSET);
        !          1228: 
        !          1229: /* We don't have GAS for the RT yet, so don't write out special
        !          1230:    .stabs in cc1plus.  */
        !          1231:    
        !          1232: #define FASCIST_ASSEMBLER
        !          1233: 
        !          1234: /* Do not break .stabs pseudos into continuations.  */
        !          1235: #define DBX_CONTIN_LENGTH 0
        !          1236: 
        !          1237: /* Don't try to use the `x' type-cross-reference character in DBX data.
        !          1238:    Also has the consequence of putting each struct, union or enum
        !          1239:    into a separate .stabs, containing only cross-refs to the others.  */
        !          1240: #define DBX_NO_XREFS
        !          1241: 
        !          1242: /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
        !          1243:    is done just by pretending it is already truncated.  */
        !          1244: #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
        !          1245: 
        !          1246: /* Specify the machine mode that pointers have.
        !          1247:    After generation of rtl, the compiler makes no further distinction
        !          1248:    between pointers and any other objects of this machine mode.  */
        !          1249: #define Pmode SImode
        !          1250: 
        !          1251: /* Mode of a function address in a call instruction (for indexing purposes).
        !          1252: 
        !          1253:    Doesn't matter on ROMP.  */
        !          1254: #define FUNCTION_MODE SImode
        !          1255: 
        !          1256: /* Define this if addresses of constant functions
        !          1257:    shouldn't be put through pseudo regs where they can be cse'd.
        !          1258:    Desirable on machines where ordinary constants are expensive
        !          1259:    but a CALL with constant address is cheap.  */
        !          1260: #define NO_FUNCTION_CSE
        !          1261: 
        !          1262: /* Define this if shift instructions ignore all but the low-order
        !          1263:    few bits.
        !          1264: 
        !          1265:    This is not true on the RT since it uses the low-order 6, not 5, bits.
        !          1266:    At some point, this should be extended to see how to express that.  */
        !          1267: 
        !          1268: /* #define SHIFT_COUNT_TRUNCATED */
        !          1269: 
        !          1270: /* Compute the cost of computing a constant rtl expression RTX whose
        !          1271:    rtx-code is CODE, contained within an expression of code OUTER_CODE.
        !          1272:    The body of this macro is a portion of a switch statement.  If the
        !          1273:    code is computed here, return it with a return statement.  Otherwise,
        !          1274:    break from the switch.  */
        !          1275: 
        !          1276: #define CONST_COSTS(RTX,CODE,OUTER_CODE) \
        !          1277:   case CONST_INT:                                              \
        !          1278:     if ((OUTER_CODE) == IOR && exact_log2 (INTVAL (RTX)) >= 0  \
        !          1279:        || (OUTER_CODE) == AND && exact_log2 (~INTVAL (RTX)) >= 0 \
        !          1280:        || (((OUTER_CODE) == PLUS || (OUTER_CODE) == MINUS)     \
        !          1281:            && (unsigned int) (INTVAL (RTX) + 15) < 31)         \
        !          1282:        || ((OUTER_CODE) == SET && (unsigned int) INTVAL (RTX) < 16))\
        !          1283:       return 0;                                                        \
        !          1284:     return ((unsigned int) (INTVAL(RTX) + 0x8000) < 0x10000            \
        !          1285:            || (INTVAL (RTX) & 0xffff0000) == 0) ? 0 : COSTS_N_INSNS (2);\
        !          1286:   case CONST:                                                  \
        !          1287:   case LABEL_REF:                                              \
        !          1288:   case SYMBOL_REF:                                             \
        !          1289:     if (current_function_operand (RTX, Pmode)) return 0;       \
        !          1290:     return COSTS_N_INSNS (2);                                  \
        !          1291:   case CONST_DOUBLE:                                           \
        !          1292:     if ((RTX) == CONST0_RTX (GET_MODE (RTX))) return 2;                \
        !          1293:     return ((GET_MODE_CLASS (GET_MODE (RTX)) == MODE_FLOAT)    \
        !          1294:            ? COSTS_N_INSNS (5) : COSTS_N_INSNS (4));
        !          1295: 
        !          1296: /* Provide the costs of a rtl expression.  This is in the body of a
        !          1297:    switch on CODE. 
        !          1298: 
        !          1299:    References to our own data area are really references to r14, so they
        !          1300:    are very cheap.  Multiples and divides are very expensive.  */
        !          1301: 
        !          1302: #define RTX_COSTS(X,CODE,OUTER_CODE)                   \
        !          1303:   case MEM:                                            \
        !          1304:     return current_function_operand (X, Pmode) ? 0 : COSTS_N_INSNS (2);        \
        !          1305:   case MULT:                                           \
        !          1306:     return (TARGET_IN_LINE_MUL && GET_MODE_CLASS (GET_MODE (X)) == MODE_INT)\
        !          1307:           ? COSTS_N_INSNS (19) : COSTS_N_INSNS (25);   \
        !          1308:   case DIV:                                            \
        !          1309:   case UDIV:                                           \
        !          1310:   case MOD:                                            \
        !          1311:   case UMOD:                                           \
        !          1312:     return COSTS_N_INSNS (45);
        !          1313: 
        !          1314: /* Compute the cost of an address.  This is meant to approximate the size
        !          1315:    and/or execution delay of an insn using that address.  If the cost is
        !          1316:    approximated by the RTL complexity, including CONST_COSTS above, as
        !          1317:    is usually the case for CISC machines, this macro should not be defined.
        !          1318:    For aggressively RISCy machines, only one insn format is allowed, so
        !          1319:    this macro should be a constant.  The value of this macro only matters
        !          1320:    for valid addresses.
        !          1321: 
        !          1322:    For the ROMP, everything is cost 0 except for addresses involving
        !          1323:    symbolic constants, which are cost 1.  */
        !          1324: 
        !          1325: #define ADDRESS_COST(RTX)                              \
        !          1326:   ((GET_CODE (RTX) == SYMBOL_REF                       \
        !          1327:     && ! CONSTANT_POOL_ADDRESS_P (RTX))                        \
        !          1328:    || GET_CODE (RTX) == LABEL_REF                      \
        !          1329:    || (GET_CODE (RTX) == CONST                         \
        !          1330:        && ! constant_pool_address_operand (RTX, Pmode))        \
        !          1331:    || (GET_CODE (RTX) == PLUS                          \
        !          1332:        && ((GET_CODE (XEXP (RTX, 1)) == SYMBOL_REF     \
        !          1333:            && ! CONSTANT_POOL_ADDRESS_P (XEXP (RTX, 0))) \
        !          1334:           || GET_CODE (XEXP (RTX, 1)) == LABEL_REF     \
        !          1335:           || GET_CODE (XEXP (RTX, 1)) == CONST)))
        !          1336: 
        !          1337: /* Adjust the length of an INSN.  LENGTH is the currently-computed length and
        !          1338:    should be adjusted to reflect any required changes.  This macro is used when
        !          1339:    there is some systematic length adjustment required that would be difficult
        !          1340:    to express in the length attribute.
        !          1341: 
        !          1342:    On the ROMP, there are two adjustments:  First, a 2-byte insn in the delay
        !          1343:    slot of a CALL (including floating-point operations) actually takes four
        !          1344:    bytes.  Second, we have to make the worst-case alignment assumption for
        !          1345:    address vectors.  */
        !          1346: 
        !          1347: #define ADJUST_INSN_LENGTH(X,LENGTH)                                   \
        !          1348:   if (GET_CODE (X) == INSN && GET_CODE (PATTERN (X)) == SEQUENCE       \
        !          1349:       && GET_CODE (XVECEXP (PATTERN (X), 0, 0)) != JUMP_INSN           \
        !          1350:       && get_attr_length (XVECEXP (PATTERN (X), 0, 1)) == 2)           \
        !          1351:     (LENGTH) += 2;                                                     \
        !          1352:   else if (GET_CODE (X) == JUMP_INSN && GET_CODE (PATTERN (X)) == ADDR_VEC) \
        !          1353:     (LENGTH) += 2;
        !          1354: 
        !          1355: /* Tell final.c how to eliminate redundant test instructions.  */
        !          1356: 
        !          1357: /* Here we define machine-dependent flags and fields in cc_status
        !          1358:    (see `conditions.h').  */
        !          1359: 
        !          1360: /* Set if condition code (really not-Z) is stored in `test bit'.  */
        !          1361: #define CC_IN_TB        01000
        !          1362: 
        !          1363: /* Set if condition code is set by an unsigned compare. */
        !          1364: #define        CC_UNSIGNED        02000
        !          1365: 
        !          1366: /* Store in cc_status the expressions
        !          1367:    that the condition codes will describe
        !          1368:    after execution of an instruction whose pattern is EXP.
        !          1369:    Do not alter them if the instruction would not alter the cc's.  */
        !          1370: 
        !          1371: #define NOTICE_UPDATE_CC(BODY,INSN) \
        !          1372:   update_cc (BODY, INSN)
        !          1373: 
        !          1374: /* Control the assembler format that we output.  */
        !          1375: 
        !          1376: /* Output at beginning of assembler file.  */
        !          1377: 
        !          1378: #define ASM_FILE_START(FILE)                           \
        !          1379: { extern char *version_string;                         \
        !          1380:   char *p;                                             \
        !          1381:                                                        \
        !          1382:   fprintf (FILE, "\t.globl .oVncs\n\t.set .oVncs,0\n") ; \
        !          1383:   fprintf (FILE, "\t.globl .oVgcc");                   \
        !          1384:   for (p = version_string; *p != ' ' && *p != 0; p++)  \
        !          1385:     fprintf (FILE, "%c", *p);                          \
        !          1386:   fprintf (FILE, "\n\t.set .oVgcc");                   \
        !          1387:   for (p = version_string; *p != ' ' && *p != 0; p++)  \
        !          1388:     fprintf (FILE, "%c", *p);                          \
        !          1389:   fprintf (FILE, ",0\n");                              \
        !          1390: }
        !          1391: 
        !          1392: /* Output to assembler file text saying following lines
        !          1393:    may contain character constants, extra white space, comments, etc.  */
        !          1394: 
        !          1395: #define ASM_APP_ON ""
        !          1396: 
        !          1397: /* Output to assembler file text saying following lines
        !          1398:    no longer contain unusual constructs.  */
        !          1399: 
        !          1400: #define ASM_APP_OFF ""
        !          1401: 
        !          1402: /* Output before instructions and read-only data.  */
        !          1403: 
        !          1404: #define TEXT_SECTION_ASM_OP ".text"
        !          1405: 
        !          1406: /* Output before writable data.  */
        !          1407: 
        !          1408: #define DATA_SECTION_ASM_OP ".data"
        !          1409: 
        !          1410: /* How to refer to registers in assembler output.
        !          1411:    This sequence is indexed by compiler's hard-register-number (see above).  */
        !          1412: 
        !          1413: #define REGISTER_NAMES \
        !          1414: {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9",   \
        !          1415:  "r10", "r11", "r12", "r13", "r14", "r15", "ap",               \
        !          1416:  "fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7" }
        !          1417: 
        !          1418: /* How to renumber registers for dbx and gdb.  */
        !          1419: 
        !          1420: #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
        !          1421: 
        !          1422: /* This is how to output the definition of a user-level label named NAME,
        !          1423:    such as the label on a static function or variable NAME.  */
        !          1424: 
        !          1425: #define ASM_OUTPUT_LABEL(FILE,NAME)    \
        !          1426:   do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
        !          1427: 
        !          1428: /* This is how to output a command to make the user-level label named NAME
        !          1429:    defined for reference from other files.  */
        !          1430: 
        !          1431: #define ASM_GLOBALIZE_LABEL(FILE,NAME) \
        !          1432:   do { fputs ("\t.globl ", FILE); assemble_name (FILE, NAME); fputs ("\n", FILE);} while (0)
        !          1433: 
        !          1434: /* This is how to output a reference to a user-level label named NAME.
        !          1435:    `assemble_name' uses this.  */
        !          1436: 
        !          1437: #define ASM_OUTPUT_LABELREF(FILE,NAME) \
        !          1438:   fprintf (FILE, "_%s", NAME)
        !          1439: 
        !          1440: /* This is how to output an internal numbered label where
        !          1441:    PREFIX is the class of label and NUM is the number within the class.  */
        !          1442: 
        !          1443: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)     \
        !          1444:   fprintf (FILE, "%s%d:\n", PREFIX, NUM)
        !          1445: 
        !          1446: /* This is how to output a label for a jump table.  Arguments are the same as
        !          1447:    for ASM_OUTPUT_INTERNAL_LABEL, except the insn for the jump table is
        !          1448:    passed. */
        !          1449: 
        !          1450: #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN)       \
        !          1451: { ASM_OUTPUT_ALIGN (FILE, 2); ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); }
        !          1452: 
        !          1453: /* This is how to store into the string LABEL
        !          1454:    the symbol_ref name of an internal numbered label where
        !          1455:    PREFIX is the class of label and NUM is the number within the class.
        !          1456:    This is suitable for output with `assemble_name'.  */
        !          1457: 
        !          1458: #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)  \
        !          1459:   sprintf (LABEL, "*%s%d", PREFIX, NUM)
        !          1460: 
        !          1461: /* This is how to output an assembler line defining a `double' constant.  */
        !          1462: 
        !          1463: #define ASM_OUTPUT_DOUBLE(FILE,VALUE)          \
        !          1464:   fprintf (FILE, "\t.double 0d%.20e\n", (VALUE))
        !          1465: 
        !          1466: /* This is how to output an assembler line defining a `float' constant.
        !          1467: 
        !          1468:    WARNING:  Believe it or not, the ROMP assembler has a bug in its
        !          1469:    handling of single-precision floating-point values making it impossible
        !          1470:    to output such values in the expected way.  Therefore, it must be output
        !          1471:    in hex.  THIS WILL NOT WORK IF CROSS-COMPILING FROM A MACHINE THAT DOES
        !          1472:    NOT USE IEEE-FORMAT FLOATING-POINT, but there is nothing that can be done
        !          1473:    about it short of fixing the assembler.  */
        !          1474: 
        !          1475: #define ASM_OUTPUT_FLOAT(FILE,VALUE)           \
        !          1476:   do { union { int i; float f; } u_i_f;                \
        !          1477:        u_i_f.f = (VALUE);                      \
        !          1478:        fprintf (FILE, "\t.long 0x%x\n", u_i_f.i);\
        !          1479:      } while (0)
        !          1480: 
        !          1481: /* This is how to output an assembler line defining an `int' constant.  */
        !          1482: 
        !          1483: #define ASM_OUTPUT_INT(FILE,VALUE)  \
        !          1484: ( fprintf (FILE, "\t.long "),                  \
        !          1485:   output_addr_const (FILE, (VALUE)),           \
        !          1486:   fprintf (FILE, "\n"))
        !          1487: 
        !          1488: /* Likewise for `char' and `short' constants.  */
        !          1489: 
        !          1490: #define ASM_OUTPUT_SHORT(FILE,VALUE)  \
        !          1491: ( fprintf (FILE, "\t.short "),                 \
        !          1492:   output_addr_const (FILE, (VALUE)),           \
        !          1493:   fprintf (FILE, "\n"))
        !          1494: 
        !          1495: #define ASM_OUTPUT_CHAR(FILE,VALUE)  \
        !          1496: ( fprintf (FILE, "\t.byte "),                  \
        !          1497:   output_addr_const (FILE, (VALUE)),           \
        !          1498:   fprintf (FILE, "\n"))
        !          1499: 
        !          1500: /* This is how to output an assembler line for a numeric constant byte.  */
        !          1501: 
        !          1502: #define ASM_OUTPUT_BYTE(FILE,VALUE)  \
        !          1503:   fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
        !          1504: 
        !          1505: /* This is how to output code to push a register on the stack.
        !          1506:    It need not be very fast code.  */
        !          1507: 
        !          1508: #define ASM_OUTPUT_REG_PUSH(FILE,REGNO)  \
        !          1509:   fprintf (FILE, "\tsis r1,4\n\tsts %s,0(r1)\n", reg_names[REGNO])
        !          1510: 
        !          1511: /* This is how to output an insn to pop a register from the stack.
        !          1512:    It need not be very fast code.  */
        !          1513: 
        !          1514: #define ASM_OUTPUT_REG_POP(FILE,REGNO)  \
        !          1515:   fprintf (FILE, "\tls r1,0(r1)\n\tais r1,4\n", reg_names[REGNO])
        !          1516: 
        !          1517: /* This is how to output an element of a case-vector that is absolute.  */
        !          1518: 
        !          1519: #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
        !          1520:   fprintf (FILE, "\t.long L%d\n", VALUE)
        !          1521: 
        !          1522: /* This is how to output an element of a case-vector that is relative.
        !          1523:    (ROMP does not use such vectors,
        !          1524:    but we must define this macro anyway.)  */
        !          1525: 
        !          1526: #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL)  abort ()
        !          1527: 
        !          1528: /* This is how to output an assembler line
        !          1529:    that says to advance the location counter
        !          1530:    to a multiple of 2**LOG bytes.  */
        !          1531: 
        !          1532: #define ASM_OUTPUT_ALIGN(FILE,LOG)     \
        !          1533:   if ((LOG) != 0)                      \
        !          1534:     fprintf (FILE, "\t.align %d\n", (LOG))
        !          1535: 
        !          1536: #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
        !          1537:   fprintf (FILE, "\t.space %d\n", (SIZE))
        !          1538: 
        !          1539: /* This says how to output an assembler line
        !          1540:    to define a global common symbol.  */
        !          1541: 
        !          1542: #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
        !          1543: ( fputs (".comm ", (FILE)),                    \
        !          1544:   assemble_name ((FILE), (NAME)),              \
        !          1545:   fprintf ((FILE), ",%d\n", (SIZE)))
        !          1546: 
        !          1547: /* This says how to output an assembler line
        !          1548:    to define a local common symbol.  */
        !          1549: 
        !          1550: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE,ROUNDED)     \
        !          1551: ( fputs (".lcomm ", (FILE)),                           \
        !          1552:   assemble_name ((FILE), (NAME)),                      \
        !          1553:   fprintf ((FILE), ",%d\n", (SIZE)))
        !          1554: 
        !          1555: /* Store in OUTPUT a string (made with alloca) containing
        !          1556:    an assembler-name for a local static variable named NAME.
        !          1557:    LABELNO is an integer which is different for each call.  */
        !          1558: 
        !          1559: #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
        !          1560: ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10),   \
        !          1561:   sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
        !          1562: 
        !          1563: /* Define the parentheses used to group arithmetic operations
        !          1564:    in assembler code.  */
        !          1565: 
        !          1566: #define ASM_OPEN_PAREN "("
        !          1567: #define ASM_CLOSE_PAREN ")"
        !          1568: 
        !          1569: /* Define results of standard character escape sequences.  */
        !          1570: #define TARGET_BELL 007
        !          1571: #define TARGET_BS 010
        !          1572: #define TARGET_TAB 011
        !          1573: #define TARGET_NEWLINE 012
        !          1574: #define TARGET_VT 013
        !          1575: #define TARGET_FF 014
        !          1576: #define TARGET_CR 015
        !          1577: 
        !          1578: /* Print operand X (an rtx) in assembler syntax to file FILE.
        !          1579:    CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
        !          1580:    For `%' followed by punctuation, CODE is the punctuation and X is null.  */
        !          1581: 
        !          1582: #define PRINT_OPERAND(FILE, X, CODE)  print_operand (FILE, X, CODE)
        !          1583: 
        !          1584: /* Define which CODE values are valid.  */
        !          1585: 
        !          1586: #define PRINT_OPERAND_PUNCT_VALID_P(CODE)      \
        !          1587:   ((CODE) == '.' || (CODE) == '#')
        !          1588: 
        !          1589: /* Print a memory address as an operand to reference that memory location.  */
        !          1590: 
        !          1591: #define PRINT_OPERAND_ADDRESS(FILE, ADDR)                      \
        !          1592: { register rtx addr = ADDR;                                    \
        !          1593:   register rtx base = 0, offset = addr;                                \
        !          1594:   if (GET_CODE (addr) == REG)                                  \
        !          1595:     base = addr, offset = const0_rtx;                          \
        !          1596:   else if (GET_CODE (addr) == PLUS                             \
        !          1597:           && GET_CODE (XEXP (addr, 0)) == REG)                 \
        !          1598:     base = XEXP (addr, 0), offset = XEXP (addr, 1);            \
        !          1599:   else if (GET_CODE (addr) == SYMBOL_REF                       \
        !          1600:           && CONSTANT_POOL_ADDRESS_P (addr))                   \
        !          1601:     {                                                          \
        !          1602:       offset = gen_rtx (CONST_INT, VOIDmode, get_pool_offset (addr) + 12);  \
        !          1603:       base = gen_rtx (REG, SImode, 14);                                \
        !          1604:     }                                                          \
        !          1605:   else if (GET_CODE (addr) == CONST                            \
        !          1606:           && GET_CODE (XEXP (addr, 0)) == PLUS                 \
        !          1607:           && GET_CODE (XEXP (XEXP (addr, 0), 1)) == CONST_INT  \
        !          1608:           && GET_CODE (XEXP (XEXP (addr, 0), 0)) == SYMBOL_REF \
        !          1609:           && CONSTANT_POOL_ADDRESS_P (XEXP (XEXP (addr, 0), 0))) \
        !          1610:     {                                                          \
        !          1611:       offset = plus_constant (XEXP (XEXP (addr, 0), 1),                \
        !          1612:                              (get_pool_offset (XEXP (XEXP (addr, 0), 0)) \
        !          1613:                               + 12));                          \
        !          1614:       base = gen_rtx (REG, SImode, 14);                                \
        !          1615:     }                                                          \
        !          1616:   output_addr_const (FILE, offset);                            \
        !          1617:   if (base)                                                    \
        !          1618:     fprintf (FILE, "(%s)", reg_names [REGNO (base)]);          \
        !          1619: }
        !          1620: 
        !          1621: /* Define the codes that are matched by predicates in aux-output.c.  */
        !          1622: 
        !          1623: #define PREDICATE_CODES \
        !          1624:   {"zero_memory_operand", {SUBREG, MEM}},                      \
        !          1625:   {"short_memory_operand", {SUBREG, MEM}},                     \
        !          1626:   {"symbolic_memory_operand", {SUBREG, MEM}},                  \
        !          1627:   {"current_function_operand", {MEM}},                         \
        !          1628:   {"constant_pool_address_operand", {SUBREG, CONST}},          \
        !          1629:   {"romp_symbolic_operand", {LABEL_REF, SYMBOL_REF, CONST}},   \
        !          1630:   {"constant_operand", {LABEL_REF, SYMBOL_REF, PLUS, CONST, CONST_INT}}, \
        !          1631:   {"reg_or_cint_operand", {SUBREG, REG, CONST_INT}},           \
        !          1632:   {"reg_or_any_cint_operand", {SUBREG, REG, CONST_INT}},       \
        !          1633:   {"short_cint_operand", {CONST_INT}},                         \
        !          1634:   {"reg_or_D_operand", {SUBREG, REG, CONST_INT}},              \
        !          1635:   {"reg_or_add_operand", {SUBREG, REG, LABEL_REF, SYMBOL_REF,  \
        !          1636:                          PLUS, CONST, CONST_INT}},             \
        !          1637:   {"reg_or_and_operand", {SUBREG, REG, CONST_INT}},            \
        !          1638:   {"reg_or_mem_operand", {SUBREG, REG, MEM}},                  \
        !          1639:   {"reg_or_nonsymb_mem_operand", {SUBREG, REG, MEM}},          \
        !          1640:   {"romp_operand", {SUBREG, MEM, REG, CONST_INT, CONST, LABEL_REF, \
        !          1641:                    SYMBOL_REF, CONST_DOUBLE}},                 \
        !          1642:   {"reg_0_operand", {REG}},                                    \
        !          1643:   {"reg_15_operand", {REG}},                                   \
        !          1644:   {"float_binary", {PLUS, MINUS, MULT, DIV}},                  \
        !          1645:   {"float_unary", {NEG, ABS}},                                 \
        !          1646:   {"float_conversion", {FLOAT_TRUNCATE, FLOAT_EXTEND, FLOAT, FIX}},
        !          1647: 
        !          1648: /* Define functions defined in aux-output.c and used in templates.  */
        !          1649: 
        !          1650: extern char *output_in_line_mul ();
        !          1651: extern char *output_fpop ();

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.