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Annotation of gcc/config/tm-m68k.h, revision 1.1

1.1     ! root        1: /* Definitions of target machine for GNU compiler.  Sun 68000/68020 version.
        !             2:    Copyright (C) 1987, 1988 Free Software Foundation, Inc.
        !             3: 
        !             4: This file is part of GNU CC.
        !             5: 
        !             6: GNU CC is free software; you can redistribute it and/or modify
        !             7: it under the terms of the GNU General Public License as published by
        !             8: the Free Software Foundation; either version 1, or (at your option)
        !             9: any later version.
        !            10: 
        !            11: GNU CC is distributed in the hope that it will be useful,
        !            12: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            14: GNU General Public License for more details.
        !            15: 
        !            16: You should have received a copy of the GNU General Public License
        !            17: along with GNU CC; see the file COPYING.  If not, write to
        !            18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            19: 
        !            20: 
        !            21: /* Note that some other tm- files include this one and then override
        !            22:    many of the definitions that relate to assembler syntax.  */
        !            23: 
        !            24: 
        !            25: /* Names to predefine in the preprocessor for this target machine.  */
        !            26: 
        !            27: /* See tm-sun3.h, tm-sun2.h, tm-isi68.h for different CPP_PREDEFINES.  */
        !            28: 
        !            29: /* Print subsidiary information on the compiler version in use.  */
        !            30: #ifdef MOTOROLA
        !            31: #define TARGET_VERSION fprintf (stderr, " (68k, Motorola syntax)");
        !            32: #else
        !            33: #define TARGET_VERSION fprintf (stderr, " (68k, MIT syntax)");
        !            34: #endif
        !            35: 
        !            36: /* Run-time compilation parameters selecting different hardware subsets.  */
        !            37: 
        !            38: extern int target_flags;
        !            39: 
        !            40: /* Macros used in the machine description to test the flags.  */
        !            41: 
        !            42: /* Compile for a 68020 (not a 68000 or 68010).  */
        !            43: #define TARGET_68020 (target_flags & 1)
        !            44: /* Compile 68881 insns for floating point (not library calls).  */
        !            45: #define TARGET_68881 (target_flags & 2)
        !            46: /* Compile using 68020 bitfield insns.  */
        !            47: #define TARGET_BITFIELD (target_flags & 4)
        !            48: /* Compile using rtd insn calling sequence.
        !            49:    This will not work unless you use prototypes at least
        !            50:    for all functions that can take varying numbers of args.  */
        !            51: #define TARGET_RTD (target_flags & 8)
        !            52: /* Compile passing first two args in regs 0 and 1.
        !            53:    This exists only to test compiler features that will
        !            54:    be needed for RISC chips.  It is not usable
        !            55:    and is not intended to be usable on this cpu.  */
        !            56: #define TARGET_REGPARM (target_flags & 020)
        !            57: /* Compile with 16-bit `int'.  */
        !            58: #define TARGET_SHORT (target_flags & 040)
        !            59: 
        !            60: /* Compile with special insns for Sun FPA.  */
        !            61: #define TARGET_FPA (target_flags & 0100)
        !            62: 
        !            63: /* Macro to define tables used to set the flags.
        !            64:    This is a list in braces of pairs in braces,
        !            65:    each pair being { "NAME", VALUE }
        !            66:    where VALUE is the bits to set or minus the bits to clear.
        !            67:    An empty string NAME is used to identify the default VALUE.  */
        !            68: 
        !            69: #define TARGET_SWITCHES  \
        !            70:   { { "68020", 5},                             \
        !            71:     { "c68020", 5},                            \
        !            72:     { "68881", 2},                             \
        !            73:     { "bitfield", 4},                          \
        !            74:     { "68000", -5},                            \
        !            75:     { "c68000", -5},                           \
        !            76:     { "soft-float", -0102},                    \
        !            77:     { "nobitfield", -4},                       \
        !            78:     { "rtd", 8},                               \
        !            79:     { "nortd", -8},                            \
        !            80:     { "short", 040},                           \
        !            81:     { "noshort", -040},                                \
        !            82:     { "fpa", 0100},                            \
        !            83:     { "nofpa", -0100},                         \
        !            84:     { "", TARGET_DEFAULT}}
        !            85: /* TARGET_DEFAULT is defined in tm-sun*.h and tm-isi68.h, etc.  */
        !            86: 
        !            87: /* Blow away 68881 flag silently on TARGET_FPA (since we can't clear
        !            88:    any bits in TARGET_SWITCHES above) */
        !            89: #define OVERRIDE_OPTIONS               \
        !            90: {                                      \
        !            91:   if (TARGET_FPA) target_flags &= ~2;  \
        !            92: }
        !            93: 
        !            94: /* target machine storage layout */
        !            95: 
        !            96: /* Define this if most significant bit is lowest numbered
        !            97:    in instructions that operate on numbered bit-fields.
        !            98:    This is true for 68020 insns such as bfins and bfexts.
        !            99:    We make it true always by avoiding using the single-bit insns
        !           100:    except in special cases with constant bit numbers.  */
        !           101: #define BITS_BIG_ENDIAN
        !           102: 
        !           103: /* Define this if most significant byte of a word is the lowest numbered.  */
        !           104: /* That is true on the 68000.  */
        !           105: #define BYTES_BIG_ENDIAN
        !           106: 
        !           107: /* Define this if most significant word of a multiword number is numbered.  */
        !           108: /* For 68000 we can decide arbitrarily
        !           109:    since there are no machine instructions for them.  */
        !           110: /* #define WORDS_BIG_ENDIAN */
        !           111: 
        !           112: /* number of bits in an addressible storage unit */
        !           113: #define BITS_PER_UNIT 8
        !           114: 
        !           115: /* Width in bits of a "word", which is the contents of a machine register.
        !           116:    Note that this is not necessarily the width of data type `int';
        !           117:    if using 16-bit ints on a 68000, this would still be 32.
        !           118:    But on a machine with 16-bit registers, this would be 16.  */
        !           119: #define BITS_PER_WORD 32
        !           120: 
        !           121: /* Width of a word, in units (bytes).  */
        !           122: #define UNITS_PER_WORD 4
        !           123: 
        !           124: /* Width in bits of a pointer.
        !           125:    See also the macro `Pmode' defined below.  */
        !           126: #define POINTER_SIZE 32
        !           127: 
        !           128: /* Allocation boundary (in *bits*) for storing pointers in memory.  */
        !           129: #define POINTER_BOUNDARY 16
        !           130: 
        !           131: /* Allocation boundary (in *bits*) for storing arguments in argument list.  */
        !           132: #define PARM_BOUNDARY (TARGET_SHORT ? 16 : 32)
        !           133: 
        !           134: /* Boundary (in *bits*) on which stack pointer should be aligned.  */
        !           135: #define STACK_BOUNDARY 16
        !           136: 
        !           137: /* Allocation boundary (in *bits*) for the code of a function.  */
        !           138: #define FUNCTION_BOUNDARY 16
        !           139: 
        !           140: /* Alignment of field after `int : 0' in a structure.  */
        !           141: #define EMPTY_FIELD_BOUNDARY 16
        !           142: 
        !           143: /* No data type wants to be aligned rounder than this.  */
        !           144: #define BIGGEST_ALIGNMENT 16
        !           145: 
        !           146: /* Define this if move instructions will actually fail to work
        !           147:    when given unaligned data.  */
        !           148: #define STRICT_ALIGNMENT
        !           149: 
        !           150: /* Define number of bits in most basic integer type.
        !           151:    (If undefined, default is BITS_PER_WORD).  */
        !           152: 
        !           153: #define INT_TYPE_SIZE (TARGET_SHORT ? 16 : 32)
        !           154: 
        !           155: /* Standard register usage.  */
        !           156: 
        !           157: /* Number of actual hardware registers.
        !           158:    The hardware registers are assigned numbers for the compiler
        !           159:    from 0 to just below FIRST_PSEUDO_REGISTER.
        !           160:    All registers that the compiler knows about must be given numbers,
        !           161:    even those that are not normally considered general registers.
        !           162:    For the 68000, we give the data registers numbers 0-7,
        !           163:    the address registers numbers 010-017,
        !           164:    and the 68881 floating point registers numbers 020-027.  */
        !           165: #define FIRST_PSEUDO_REGISTER 56 /* 24 */
        !           166: 
        !           167: /* 1 for registers that have pervasive standard uses
        !           168:    and are not available for the register allocator.
        !           169:    On the 68000, only the stack pointer is such.  */
        !           170: /* fpa0 is also reserved so that it can be used to move shit back and
        !           171:    forth between high fpa regs and everything else. */
        !           172: #define FIXED_REGISTERS  \
        !           173:  {0, 0, 0, 0, 0, 0, 0, 0, \
        !           174:   0, 0, 0, 0, 0, 0, 0, 1, \
        !           175:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           176:   /* FPA registers.  */   \
        !           177:   1, 0, 0, 0, 0, 0, 0, 0, \
        !           178:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           179:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           180:   0, 0, 0, 0, 0, 0, 0, 0, }
        !           181: 
        !           182: /* 1 for registers not available across function calls.
        !           183:    These must include the FIXED_REGISTERS and also any
        !           184:    registers that can be used without being saved.
        !           185:    The latter must include the registers where values are returned
        !           186:    and the register where structure-value addresses are passed.
        !           187:    Aside from that, you can include as many other registers as you like.  */
        !           188: #define CALL_USED_REGISTERS \
        !           189:  {1, 1, 0, 0, 0, 0, 0, 0, \
        !           190:   1, 1, 0, 0, 0, 0, 0, 1, \
        !           191:   1, 1, 0, 0, 0, 0, 0, 0, \
        !           192:   /* FPA registers.  */   \
        !           193:   1, 1, 1, 1, 0, 0, 0, 0, \
        !           194:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           195:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           196:   0, 0, 0, 0, 0, 0, 0, 0, }
        !           197: 
        !           198: /* Make sure everything's fine if we *don't* have a given processor.
        !           199:    This assumes that putting a register in fixed_regs will keep the
        !           200:    compilers mitt's completely off it.  We don't bother to zero it out
        !           201:    of register classes.  If neither TARGET_FPA or TARGET_68881 is set,
        !           202:    the compiler won't touch since no instructions that use these
        !           203:    registers will be valid.  */
        !           204: #define CONDITIONAL_REGISTER_USAGE \
        !           205: {                                              \
        !           206:   int i;                                       \
        !           207:   HARD_REG_SET x;                              \
        !           208:   if (!TARGET_FPA)                             \
        !           209:     {                                          \
        !           210:       COPY_HARD_REG_SET (x, reg_class_contents[(int)FPA_REGS]); \
        !           211:       for (i = 0; i < FIRST_PSEUDO_REGISTER; i++ ) \
        !           212:        if (TEST_HARD_REG_BIT (x, i))           \
        !           213:        fixed_regs[i] = call_used_regs[i] = 1;  \
        !           214:     }                                          \
        !           215:   if (TARGET_FPA)                              \
        !           216:     {                                          \
        !           217:       COPY_HARD_REG_SET (x, reg_class_contents[(int)FP_REGS]); \
        !           218:       for (i = 0; i < FIRST_PSEUDO_REGISTER; i++ ) \
        !           219:        if (TEST_HARD_REG_BIT (x, i))           \
        !           220:        fixed_regs[i] = call_used_regs[i] = 1;  \
        !           221:     }                                          \
        !           222: }
        !           223: 
        !           224: /* Return number of consecutive hard regs needed starting at reg REGNO
        !           225:    to hold something of mode MODE.
        !           226:    This is ordinarily the length in words of a value of mode MODE
        !           227:    but can be less for certain modes in special long registers.
        !           228: 
        !           229:    On the 68000, ordinary registers hold 32 bits worth;
        !           230:    for the 68881 registers, a single register is always enough for
        !           231:    anything that can be stored in them at all.  */
        !           232: #define HARD_REGNO_NREGS(REGNO, MODE)   \
        !           233:   ((REGNO) >= 16 ? 1                           \
        !           234:    : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
        !           235: 
        !           236: /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
        !           237:    On the 68000, the cpu registers can hold any mode but the 68881 registers
        !           238:    can hold only SFmode or DFmode.  And the 68881 registers can't hold anything
        !           239:    if 68881 use is disabled.  However, the Sun FPA register can
        !           240:    (apparently) hold whatever you feel like putting in them.  */
        !           241: #define HARD_REGNO_MODE_OK(REGNO, MODE) \
        !           242:   (((REGNO) < 16 &&                                            \
        !           243:     (!TARGET_FPA || (MODE) != DFmode || (REGNO) != 7))         \
        !           244:    || ((REGNO) < 24                                            \
        !           245:        ? TARGET_68881 && ((MODE) == SFmode || (MODE) == DFmode)        \
        !           246:        : ((REGNO) < 56                                         \
        !           247:          ? TARGET_FPA : 0)))
        !           248: 
        !           249: /* Value is 1 if it is a good idea to tie two pseudo registers
        !           250:    when one has mode MODE1 and one has mode MODE2.
        !           251:    If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
        !           252:    for any hard reg, then this must be 0 for correct output.  */
        !           253: #define MODES_TIEABLE_P(MODE1, MODE2)                  \
        !           254:   (! TARGET_68881                                      \
        !           255:    || (((MODE1) == SFmode || (MODE1) == DFmode)                \
        !           256:        == ((MODE2) == SFmode || (MODE2) == DFmode)))
        !           257: 
        !           258: /* Specify the registers used for certain standard purposes.
        !           259:    The values of these macros are register numbers.  */
        !           260: 
        !           261: /* m68000 pc isn't overloaded on a register.  */
        !           262: /* #define PC_REGNUM  */
        !           263: 
        !           264: /* Register to use for pushing function arguments.  */
        !           265: #define STACK_POINTER_REGNUM 15
        !           266: 
        !           267: /* Base register for access to local variables of the function.  */
        !           268: #define FRAME_POINTER_REGNUM 14
        !           269: 
        !           270: /* Value should be nonzero if functions must have frame pointers.
        !           271:    Zero means the frame pointer need not be set up (and parms
        !           272:    may be accessed via the stack pointer) in functions that seem suitable.
        !           273:    This is computed in `reload', in reload1.c.  */
        !           274: #define FRAME_POINTER_REQUIRED 0
        !           275: 
        !           276: /* Base register for access to arguments of the function.  */
        !           277: #define ARG_POINTER_REGNUM 14
        !           278: 
        !           279: /* Register in which static-chain is passed to a function.  */
        !           280: #define STATIC_CHAIN_REGNUM 8
        !           281: 
        !           282: /* Register in which address to store a structure value
        !           283:    is passed to a function.  */
        !           284: #define STRUCT_VALUE_REGNUM 9
        !           285: 
        !           286: /* Define the classes of registers for register constraints in the
        !           287:    machine description.  Also define ranges of constants.
        !           288: 
        !           289:    One of the classes must always be named ALL_REGS and include all hard regs.
        !           290:    If there is more than one class, another class must be named NO_REGS
        !           291:    and contain no registers.
        !           292: 
        !           293:    The name GENERAL_REGS must be the name of a class (or an alias for
        !           294:    another name such as ALL_REGS).  This is the class of registers
        !           295:    that is allowed by "g" or "r" in a register constraint.
        !           296:    Also, registers outside this class are allocated only when
        !           297:    instructions express preferences for them.
        !           298: 
        !           299:    The classes must be numbered in nondecreasing order; that is,
        !           300:    a larger-numbered class must never be contained completely
        !           301:    in a smaller-numbered class.
        !           302: 
        !           303:    For any two classes, it is very desirable that there be another
        !           304:    class that represents their union.  */
        !           305: 
        !           306: /* The 68000 has three kinds of registers, so eight classes would be
        !           307:    a complete set.  One of them is not needed.  */
        !           308: 
        !           309: /*
        !           310:  * Notes on final choices:
        !           311:  *
        !           312:  *   1) Didn't feel any need to union-ize LOW_FPA_REGS with anything
        !           313:  * else.
        !           314:  *   2) Removed all unions that involve address registers with
        !           315:  * floating point registers (left in unions of address and data with
        !           316:  * floating point).
        !           317:  *   3) Defined GENERAL_REGS as ADDR_OR_DATA_REGS.
        !           318:  *   4) Defined ALL_REGS as FPA_OR_FP_OR_GENERAL_REGS.
        !           319:  *   4) Left in everything else.
        !           320:  */
        !           321: enum reg_class { NO_REGS, LO_FPA_REGS, FPA_REGS, FP_REGS,
        !           322:   FP_OR_FPA_REGS, DATA_REGS, DATA_OR_FPA_REGS, DATA_OR_FP_REGS,
        !           323:   DATA_OR_FP_OR_FPA_REGS, ADDR_REGS, GENERAL_REGS,
        !           324:   GENERAL_OR_FPA_REGS, GENERAL_OR_FP_REGS, ALL_REGS,
        !           325:   LIM_REG_CLASSES };
        !           326: 
        !           327: #define N_REG_CLASSES (int) LIM_REG_CLASSES
        !           328: 
        !           329: /* Give names of register classes as strings for dump file.   */
        !           330: 
        !           331: #define REG_CLASS_NAMES \
        !           332:  { "NO_REGS", "LO_FPA_REGS", "FPA_REGS", "FP_REGS",  \
        !           333:    "FP_OR_FPA_REGS", "DATA_REGS", "DATA_OR_FPA_REGS", "DATA_OR_FP_REGS",  \
        !           334:    "DATA_OR_FP_OR_FPA_REGS", "ADDR_REGS", "GENERAL_REGS",  \
        !           335:    "GENERAL_OR_FPA_REGS", "GENERAL_OR_FP_REGS", "ALL_REGS" }
        !           336: 
        !           337: /* Define which registers fit in which classes.
        !           338:    This is an initializer for a vector of HARD_REG_SET
        !           339:    of length N_REG_CLASSES.  */
        !           340: 
        !           341: #define REG_CLASS_CONTENTS \
        !           342: {                                                      \
        !           343:  {0, 0},                       /* NO_REGS */           \
        !           344:  {0xff000000, 0x000000ff},     /* LO_FPA_REGS */       \
        !           345:  {0xff000000, 0x00ffffff},     /* FPA_REGS */          \
        !           346:  {0x00ff0000, 0x00000000},     /* FP_REGS */           \
        !           347:  {0xffff0000, 0x00ffffff},     /* FP_OR_FPA_REGS */    \
        !           348:  {0x000000ff, 0x00000000},     /* DATA_REGS */         \
        !           349:  {0xff0000ff, 0x00ffffff},     /* DATA_OR_FPA_REGS */  \
        !           350:  {0x00ff00ff, 0x00000000},     /* DATA_OR_FP_REGS */   \
        !           351:  {0xffff00ff, 0x00ffffff},     /* DATA_OR_FP_OR_FPA_REGS */\
        !           352:  {0x0000ff00, 0x00000000},     /* ADDR_REGS */         \
        !           353:  {0x0000ffff, 0x00000000},     /* GENERAL_REGS */      \
        !           354:  {0xff00ffff, 0x00ffffff},     /* GENERAL_OR_FPA_REGS */\
        !           355:  {0x00ffffff, 0x00000000},     /* GENERAL_OR_FP_REGS */\
        !           356:  {0xffffffff, 0x00ffffff},     /* ALL_REGS */          \
        !           357: }
        !           358: 
        !           359: /* The same information, inverted:
        !           360:    Return the class number of the smallest class containing
        !           361:    reg number REGNO.  This could be a conditional expression
        !           362:    or could index an array.  */
        !           363: 
        !           364: extern enum reg_class regno_reg_class[];
        !           365: #define REGNO_REG_CLASS(REGNO) (regno_reg_class[(REGNO)>>3])
        !           366: 
        !           367: /* The class value for index registers, and the one for base regs.  */
        !           368: 
        !           369: #define INDEX_REG_CLASS GENERAL_REGS
        !           370: #define BASE_REG_CLASS ADDR_REGS
        !           371: 
        !           372: /* Get reg_class from a letter such as appears in the machine description.
        !           373:    We do a trick here to modify the effective constraints on the
        !           374:    machine description; we zorch the constraint letters that aren't
        !           375:    appropriate for a specific target.  This allows us to guarantee
        !           376:    that a specific kind of register will not be used for a given target
        !           377:    without fiddling with the register classes above. */
        !           378: 
        !           379: #define REG_CLASS_FROM_LETTER(C) \
        !           380:   ((C) == 'a' ? ADDR_REGS :                    \
        !           381:    ((C) == 'd' ? DATA_REGS :                   \
        !           382:     ((C) == 'f' ? (TARGET_68881 ? FP_REGS :    \
        !           383:                   NO_REGS) :                   \
        !           384:      ((C) == 'x' ? (TARGET_FPA ? FPA_REGS :    \
        !           385:                    NO_REGS) :                  \
        !           386:       ((C) == 'y' ? (TARGET_FPA ? LO_FPA_REGS :        \
        !           387:                     NO_REGS) :                 \
        !           388:        NO_REGS)))))
        !           389: 
        !           390: /* The letters I, J, K, L and M in a register constraint string
        !           391:    can be used to stand for particular ranges of immediate operands.
        !           392:    This macro defines what the ranges are.
        !           393:    C is the letter, and VALUE is a constant value.
        !           394:    Return 1 if VALUE is in the range specified by C.
        !           395: 
        !           396:    For the 68000, `I' is used for the range 1 to 8
        !           397:    allowed as immediate shift counts and in addq.
        !           398:    `J' is used for the range of signed numbers that fit in 16 bits.
        !           399:    `K' is for numbers that moveq can't handle.
        !           400:    `L' is for range -8 to -1, range of values that can be added with subq.  */
        !           401: 
        !           402: #define CONST_OK_FOR_LETTER_P(VALUE, C)  \
        !           403:   ((C) == 'I' ? (VALUE) > 0 && (VALUE) <= 8 :    \
        !           404:    (C) == 'J' ? (VALUE) >= -0x8000 && (VALUE) <= 0x7FFF :      \
        !           405:    (C) == 'K' ? (VALUE) < -0x80 || (VALUE) >= 0x80 :   \
        !           406:    (C) == 'L' ? (VALUE) < 0 && (VALUE) >= -8 : 0)
        !           407: 
        !           408: /*
        !           409:  * A small bit of explanation:
        !           410:  * "G" defines all of the floating constants that are *NOT* 68881
        !           411:  * constants.  this is so 68881 constants get reloaded and the
        !           412:  * fpmovecr is used.  "H" defines *only* the class of constants that
        !           413:  * the fpa can use, because these can be gotten at in any fpa
        !           414:  * instruction and there is no need to force reloads.
        !           415:  */
        !           416: 
        !           417: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)  \
        !           418:   ((C) == 'G' ? ! (TARGET_68881 && standard_68881_constant_p (VALUE)) : \
        !           419:    (C) == 'H' ? (TARGET_FPA && standard_sun_fpa_constant_p (VALUE)) : 0)
        !           420: 
        !           421: /* Given an rtx X being reloaded into a reg required to be
        !           422:    in class CLASS, return the class of reg to actually use.
        !           423:    In general this is just CLASS; but on some machines
        !           424:    in some cases it is preferable to use a more restrictive class.
        !           425:    On the 68000 series, use a data reg if possible when the
        !           426:    value is a constant in the range where moveq could be used
        !           427:    and we ensure that QImodes are reloaded into data regs.  */
        !           428: 
        !           429: #define PREFERRED_RELOAD_CLASS(X,CLASS)  \
        !           430:   ((GET_CODE (X) == CONST_INT                  \
        !           431:     && (unsigned) (INTVAL (X) + 0x80) < 0x100  \
        !           432:     && (CLASS) != ADDR_REGS)                   \
        !           433:    ? DATA_REGS                                 \
        !           434:    : GET_MODE (X) == QImode                    \
        !           435:    ? DATA_REGS                                 \
        !           436:    : (CLASS))
        !           437: 
        !           438: /* Return the maximum number of consecutive registers
        !           439:    needed to represent mode MODE in a register of class CLASS.  */
        !           440: /* On the 68000, this is the size of MODE in words,
        !           441:    except in the FP regs, where a single reg is always enough.  */
        !           442: #define CLASS_MAX_NREGS(CLASS, MODE)   \
        !           443:  ((CLASS) == FP_REGS || (CLASS) == FPA_REGS || (CLASS) == LO_FPA_REGS ? 1 \
        !           444:   : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
        !           445: 
        !           446: /* Stack layout; function entry, exit and calling.  */
        !           447: 
        !           448: /* Define this if pushing a word on the stack
        !           449:    makes the stack pointer a smaller address.  */
        !           450: #define STACK_GROWS_DOWNWARD
        !           451: 
        !           452: /* Define this if the nominal address of the stack frame
        !           453:    is at the high-address end of the local variables;
        !           454:    that is, each additional local variable allocated
        !           455:    goes at a more negative offset in the frame.  */
        !           456: #define FRAME_GROWS_DOWNWARD
        !           457: 
        !           458: /* Offset within stack frame to start allocating local variables at.
        !           459:    If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
        !           460:    first local allocated.  Otherwise, it is the offset to the BEGINNING
        !           461:    of the first local allocated.  */
        !           462: #define STARTING_FRAME_OFFSET 0
        !           463: 
        !           464: /* If we generate an insn to push BYTES bytes,
        !           465:    this says how many the stack pointer really advances by.
        !           466:    On the 68000, sp@- in a byte insn really pushes a word.  */
        !           467: #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1)
        !           468: 
        !           469: /* Offset of first parameter from the argument pointer register value.  */
        !           470: #define FIRST_PARM_OFFSET(FNDECL) 8
        !           471: 
        !           472: /* Value is 1 if returning from a function call automatically
        !           473:    pops the arguments described by the number-of-args field in the call.
        !           474:    FUNTYPE is the data type of the function (as a tree),
        !           475:    or for a library call it is an identifier node for the subroutine name.
        !           476: 
        !           477:    On the 68000, the RTS insn cannot pop anything.
        !           478:    On the 68010, the RTD insn may be used to pop them if the number
        !           479:      of args is fixed, but if the number is variable then the caller
        !           480:      must pop them all.  RTD can't be used for library calls now
        !           481:      because the library is compiled with the Unix compiler.
        !           482:    Use of RTD is a selectable option, since it is incompatible with
        !           483:    standard Unix calling sequences.  If the option is not selected,
        !           484:    the caller must always pop the args.  */
        !           485: 
        !           486: #define RETURN_POPS_ARGS(FUNTYPE)   \
        !           487:   (TARGET_RTD && TREE_CODE (FUNTYPE) != IDENTIFIER_NODE                \
        !           488:    && (TYPE_ARG_TYPES (FUNTYPE) == 0                           \
        !           489:        || TREE_VALUE (tree_last (TYPE_ARG_TYPES (FUNTYPE))) == void_type_node))
        !           490: 
        !           491: /* Define how to find the value returned by a function.
        !           492:    VALTYPE is the data type of the value (as a tree).
        !           493:    If the precise function being called is known, FUNC is its FUNCTION_DECL;
        !           494:    otherwise, FUNC is 0.  */
        !           495: 
        !           496: /* On the 68000 the return value is in D0 regardless.  */
        !           497: 
        !           498: #define FUNCTION_VALUE(VALTYPE, FUNC)  \
        !           499:   gen_rtx (REG, TYPE_MODE (VALTYPE), 0)
        !           500: 
        !           501: /* Define how to find the value returned by a library function
        !           502:    assuming the value has mode MODE.  */
        !           503: 
        !           504: /* On the 68000 the return value is in D0 regardless.  */
        !           505: 
        !           506: #define LIBCALL_VALUE(MODE)  gen_rtx (REG, MODE, 0)
        !           507: 
        !           508: /* 1 if N is a possible register number for a function value.
        !           509:    On the 68000, d0 is the only register thus used.  */
        !           510: 
        !           511: #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
        !           512: 
        !           513: /* Define this if PCC uses the nonreentrant convention for returning
        !           514:    structure and union values.  */
        !           515: 
        !           516: #define PCC_STATIC_STRUCT_RETURN
        !           517: 
        !           518: /* 1 if N is a possible register number for function argument passing.
        !           519:    On the 68000, no registers are used in this way.  */
        !           520: 
        !           521: #define FUNCTION_ARG_REGNO_P(N) 0
        !           522: 
        !           523: /* Define a data type for recording info about an argument list
        !           524:    during the scan of that argument list.  This data type should
        !           525:    hold all necessary information about the function itself
        !           526:    and about the args processed so far, enough to enable macros
        !           527:    such as FUNCTION_ARG to determine where the next arg should go.
        !           528: 
        !           529:    On the m68k, this is a single integer, which is a number of bytes
        !           530:    of arguments scanned so far.  */
        !           531: 
        !           532: #define CUMULATIVE_ARGS int
        !           533: 
        !           534: /* Initialize a variable CUM of type CUMULATIVE_ARGS
        !           535:    for a call to a function whose data type is FNTYPE.
        !           536:    For a library call, FNTYPE is 0.
        !           537: 
        !           538:    On the m68k, the offset starts at 0.  */
        !           539: 
        !           540: #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE)       \
        !           541:  ((CUM) = 0)
        !           542: 
        !           543: /* Update the data in CUM to advance over an argument
        !           544:    of mode MODE and data type TYPE.
        !           545:    (TYPE is null for libcalls where that information may not be available.)  */
        !           546: 
        !           547: #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)   \
        !           548:  ((CUM) += ((MODE) != BLKmode                  \
        !           549:            ? (GET_MODE_SIZE (MODE) + 3) & ~3   \
        !           550:            : (int_size_in_bytes (TYPE) + 3) & ~3))
        !           551: 
        !           552: /* Define where to put the arguments to a function.
        !           553:    Value is zero to push the argument on the stack,
        !           554:    or a hard register in which to store the argument.
        !           555: 
        !           556:    MODE is the argument's machine mode.
        !           557:    TYPE is the data type of the argument (as a tree).
        !           558:     This is null for libcalls where that information may
        !           559:     not be available.
        !           560:    CUM is a variable of type CUMULATIVE_ARGS which gives info about
        !           561:     the preceding args and about the function being called.
        !           562:    NAMED is nonzero if this argument is a named parameter
        !           563:     (otherwise it is an extra parameter matching an ellipsis).  */
        !           564: 
        !           565: /* On the 68000 all args are pushed, except if -mregparm is specified
        !           566:    then the first two words of arguments are passed in d0, d1.
        !           567:    *NOTE* -mregparm does not work.
        !           568:    It exists only to test register calling conventions.  */
        !           569: 
        !           570: #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
        !           571: ((TARGET_REGPARM && (CUM) < 8) ? gen_rtx (REG, (MODE), (CUM) / 4) : 0)
        !           572: 
        !           573: /* For an arg passed partly in registers and partly in memory,
        !           574:    this is the number of registers used.
        !           575:    For args passed entirely in registers or entirely in memory, zero.  */
        !           576: 
        !           577: #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
        !           578: ((TARGET_REGPARM && (CUM) < 8                                  \
        !           579:   && 8 < ((CUM) + ((MODE) == BLKmode                           \
        !           580:                      ? int_size_in_bytes (TYPE)                \
        !           581:                      : GET_MODE_SIZE (MODE))))                 \
        !           582:  ? 2 - (CUM) / 4 : 0)
        !           583: 
        !           584: /* This macro generates the assembly code for function entry.
        !           585:    FILE is a stdio stream to output the code to.
        !           586:    SIZE is an int: how many units of temporary storage to allocate.
        !           587:    Refer to the array `regs_ever_live' to determine which registers
        !           588:    to save; `regs_ever_live[I]' is nonzero if register number I
        !           589:    is ever used in the function.  This macro is responsible for
        !           590:    knowing which registers should not be saved even if used.  */
        !           591: 
        !           592: /* Note that the order of the bit mask for fmovem is the opposite
        !           593:    of the order for movem!  */
        !           594: 
        !           595: #define FUNCTION_PROLOGUE(FILE, SIZE)     \
        !           596: { register int regno;                                          \
        !           597:   register int mask = 0;                                       \
        !           598:   extern char call_used_regs[];                                        \
        !           599:   int fsize = ((SIZE) + 3) & -4;                               \
        !           600:   if (frame_pointer_needed)                                    \
        !           601:     { if (TARGET_68020 || fsize < 0x8000)                      \
        !           602:         fprintf (FILE, "\tlink a6,#%d\n", -fsize);             \
        !           603:       else                                                     \
        !           604:        fprintf (FILE, "\tlink a6,#0\n\tsubl #%d,sp\n", fsize); }  \
        !           605:   for (regno = 24; regno < 56; regno++)                                \
        !           606:     if (regs_ever_live[regno] && ! call_used_regs[regno])      \
        !           607:       fprintf(FILE, "\tfpmoved %s, sp@-\n",                    \
        !           608:              reg_names[regno]);                                \
        !           609:   for (regno = 16; regno < 24; regno++)                                \
        !           610:     if (regs_ever_live[regno] && ! call_used_regs[regno])      \
        !           611:        mask |= 1 << (regno - 16);                              \
        !           612:   if ((mask & 0xff) != 0)                                      \
        !           613:     fprintf (FILE, "\tfmovem #0x%x,sp@-\n", mask & 0xff);       \
        !           614:   mask = 0;                                                    \
        !           615:   for (regno = 0; regno < 16; regno++)                         \
        !           616:     if (regs_ever_live[regno] && ! call_used_regs[regno])      \
        !           617:        mask |= 1 << (15 - regno);                              \
        !           618:   if (frame_pointer_needed)                                    \
        !           619:     mask &= ~ (1 << (15-FRAME_POINTER_REGNUM));                        \
        !           620:   if (exact_log2 (mask) >= 0)                                  \
        !           621:     fprintf (FILE, "\tmovel %s,sp@-\n", reg_names[15 - exact_log2 (mask)]);  \
        !           622:   else if (mask) fprintf (FILE, "\tmoveml #0x%x,sp@-\n", mask); }
        !           623: 
        !           624: /* Output assembler code to FILE to increment profiler label # LABELNO
        !           625:    for profiling a function entry.  */
        !           626: 
        !           627: #define FUNCTION_PROFILER(FILE, LABELNO)  \
        !           628:   fprintf (FILE, "\tlea LP%d,a0\n\tjsr mcount\n", (LABELNO))
        !           629: 
        !           630: /* Output assembler code to FILE to initialize this source file's
        !           631:    basic block profiling info, if that has not already been done.  */
        !           632: 
        !           633: #define FUNCTION_BLOCK_PROFILER(FILE, LABELNO)  \
        !           634:   fprintf (FILE, "\ttstl LPBX0\n\tbne LPI%d\n\tpea LPBX0\n\tjsr ___bb_init_func\n\taddql #4,sp\nLPI%d:\n",  \
        !           635:           LABELNO, LABELNO);
        !           636: 
        !           637: /* Output assembler code to FILE to increment the entry-count for
        !           638:    the BLOCKNO'th basic block in this source file.  */
        !           639: 
        !           640: #define BLOCK_PROFILER(FILE, BLOCKNO)  \
        !           641:   fprintf (FILE, "\taddql #1,LPBX2+%d\n", 4 * BLOCKNO)
        !           642: 
        !           643: /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
        !           644:    the stack pointer does not matter.  The value is tested only in
        !           645:    functions that have frame pointers.
        !           646:    No definition is equivalent to always zero.  */
        !           647: 
        !           648: #define EXIT_IGNORE_STACK 1
        !           649: 
        !           650: /* This macro generates the assembly code for function exit,
        !           651:    on machines that need it.  If FUNCTION_EPILOGUE is not defined
        !           652:    then individual return instructions are generated for each
        !           653:    return statement.  Args are same as for FUNCTION_PROLOGUE.
        !           654: 
        !           655:    The function epilogue should not depend on the current stack pointer!
        !           656:    It should use the frame pointer only.  This is mandatory because
        !           657:    of alloca; we also take advantage of it to omit stack adjustments
        !           658:    before returning.  */
        !           659: 
        !           660: #define FUNCTION_EPILOGUE(FILE, SIZE) \
        !           661: { register int regno;                                          \
        !           662:   register int mask, fmask;                                    \
        !           663:   register int nregs;                                          \
        !           664:   int offset, foffset, fpoffset;                               \
        !           665:   extern char call_used_regs[];                                        \
        !           666:   extern int current_function_pops_args;                       \
        !           667:   extern int current_function_args_size;                       \
        !           668:   int fsize = ((SIZE) + 3) & -4;                               \
        !           669:   int big = 0;                                                 \
        !           670:   FUNCTION_EXTRA_EPILOGUE (FILE, SIZE);                                \
        !           671:   nregs = 0;  fmask = 0; fpoffset = 0;                         \
        !           672:   for (regno = 24 ; regno < 56 ; regno++)                      \
        !           673:     if (regs_ever_live[regno] && ! call_used_regs[regno])      \
        !           674:       nregs++;                                                 \
        !           675:   fpoffset = nregs*8;                                          \
        !           676:   nregs = 0;                                                   \
        !           677:   for (regno = 16; regno < 24; regno++)                                \
        !           678:     if (regs_ever_live[regno] && ! call_used_regs[regno])      \
        !           679:       { nregs++; fmask |= 1 << (23 - regno); }                 \
        !           680:   foffset = fpoffset + nregs * 12;                             \
        !           681:   nregs = 0;  mask = 0;                                                \
        !           682:   if (frame_pointer_needed) regs_ever_live[FRAME_POINTER_REGNUM] = 0; \
        !           683:   for (regno = 0; regno < 16; regno++)                         \
        !           684:     if (regs_ever_live[regno] && ! call_used_regs[regno])      \
        !           685:       { nregs++; mask |= 1 << regno; }                         \
        !           686:   offset = foffset + nregs * 4;                                        \
        !           687:   if (offset + fsize >= 0x8000                                         \
        !           688:       && frame_pointer_needed                                  \
        !           689:       && (mask || fmask || fpoffset))                          \
        !           690:     { fprintf (FILE, "\tmovel #%d,a0\n", -fsize);              \
        !           691:       fsize = 0, big = 1; }                                    \
        !           692:   if (exact_log2 (mask) >= 0) {                                        \
        !           693:     if (big)                                                   \
        !           694:       fprintf (FILE, "\tmovel a6@(-%d,a0:l),%s\n",             \
        !           695:               offset + fsize, reg_names[exact_log2 (mask)]);   \
        !           696:     else if (! frame_pointer_needed)                           \
        !           697:       fprintf (FILE, "\tmovel sp@+,%s\n",                      \
        !           698:               reg_names[exact_log2 (mask)]);                   \
        !           699:     else                                                       \
        !           700:       fprintf (FILE, "\tmovel a6@(-%d),%s\n",                  \
        !           701:               offset + fsize, reg_names[exact_log2 (mask)]); } \
        !           702:   else if (mask) {                                             \
        !           703:     if (big)                                                   \
        !           704:       fprintf (FILE, "\tmoveml a6@(-%d,a0:l),#0x%x\n",         \
        !           705:               offset + fsize, mask);                           \
        !           706:     else if (! frame_pointer_needed)                           \
        !           707:       fprintf (FILE, "\tmoveml sp@+,#0x%x\n", mask);           \
        !           708:     else                                                       \
        !           709:       fprintf (FILE, "\tmoveml a6@(-%d),#0x%x\n",              \
        !           710:               offset + fsize, mask); }                         \
        !           711:   if (fmask) {                                                 \
        !           712:     if (big)                                                   \
        !           713:       fprintf (FILE, "\tfmovem a6@(-%d,a0:l),#0x%x\n",         \
        !           714:               foffset + fsize, fmask);                         \
        !           715:     else if (! frame_pointer_needed)                           \
        !           716:       fprintf (FILE, "\tfmovem sp@+,#0x%x\n", fmask);          \
        !           717:     else                                                       \
        !           718:       fprintf (FILE, "\tfmovem a6@(-%d),#0x%x\n",              \
        !           719:               foffset + fsize, fmask); }                       \
        !           720:   if (fpoffset != 0)                                           \
        !           721:     for (regno = 55; regno >= 24; regno--)                     \
        !           722:       if (regs_ever_live[regno] && ! call_used_regs[regno]) {  \
        !           723:        if (big)                                                \
        !           724:          fprintf(FILE, "\tfpmoved a6@(-%d,a0:l), %s\n",        \
        !           725:                  fpoffset + fsize, reg_names[regno]);          \
        !           726:        else if (! frame_pointer_needed)                        \
        !           727:          fprintf(FILE, "\tfpmoved sp@+, %s\n",                 \
        !           728:                  reg_names[regno]);                            \
        !           729:        else                                                    \
        !           730:          fprintf(FILE, "\tfpmoved a6@(-%d), %s\n",             \
        !           731:                  fpoffset + fsize, reg_names[regno]);          \
        !           732:        fpoffset -= 8;                                          \
        !           733:       }                                                                \
        !           734:   if (frame_pointer_needed)                                    \
        !           735:     fprintf (FILE, "\tunlk a6\n");                             \
        !           736:   if (current_function_pops_args && current_function_args_size)        \
        !           737:     fprintf (FILE, "\trtd #%d\n", current_function_args_size); \
        !           738:   else fprintf (FILE, "\trts\n"); }
        !           739: 
        !           740: /* This is a hook for other tm files to change.  */
        !           741: #define FUNCTION_EXTRA_EPILOGUE(FILE, SIZE)
        !           742: 
        !           743: /* If the memory address ADDR is relative to the frame pointer,
        !           744:    correct it to be relative to the stack pointer instead.
        !           745:    This is for when we don't use a frame pointer.
        !           746:    ADDR should be a variable name.  */
        !           747: 
        !           748: #define FIX_FRAME_POINTER_ADDRESS(ADDR,DEPTH)  \
        !           749: { int offset = -1;                                                     \
        !           750:   rtx regs = stack_pointer_rtx;                                                \
        !           751:   if (ADDR == frame_pointer_rtx)                                       \
        !           752:     offset = 0;                                                                \
        !           753:   else if (GET_CODE (ADDR) == PLUS && XEXP (ADDR, 0) == frame_pointer_rtx \
        !           754:           && GET_CODE (XEXP (ADDR, 1)) == CONST_INT)                   \
        !           755:     offset = INTVAL (XEXP (ADDR, 1));                                  \
        !           756:   else if (GET_CODE (ADDR) == PLUS && XEXP (ADDR, 0) == frame_pointer_rtx) \
        !           757:     { rtx other_reg = XEXP (ADDR, 1);                                  \
        !           758:       offset = 0;                                                      \
        !           759:       regs = gen_rtx (PLUS, Pmode, stack_pointer_rtx, other_reg); }    \
        !           760:   else if (GET_CODE (ADDR) == PLUS && XEXP (ADDR, 1) == frame_pointer_rtx) \
        !           761:     { rtx other_reg = XEXP (ADDR, 0);                                  \
        !           762:       offset = 0;                                                      \
        !           763:       regs = gen_rtx (PLUS, Pmode, stack_pointer_rtx, other_reg); }    \
        !           764:   else if (GET_CODE (ADDR) == PLUS                                     \
        !           765:           && GET_CODE (XEXP (ADDR, 0)) == PLUS                         \
        !           766:           && XEXP (XEXP (ADDR, 0), 0) == frame_pointer_rtx             \
        !           767:           && GET_CODE (XEXP (ADDR, 1)) == CONST_INT)                   \
        !           768:     { rtx other_reg = XEXP (XEXP (ADDR, 0), 1);                                \
        !           769:       offset = INTVAL (XEXP (ADDR, 1));                                        \
        !           770:       regs = gen_rtx (PLUS, Pmode, stack_pointer_rtx, other_reg); }    \
        !           771:   else if (GET_CODE (ADDR) == PLUS                                     \
        !           772:           && GET_CODE (XEXP (ADDR, 0)) == PLUS                         \
        !           773:           && XEXP (XEXP (ADDR, 0), 1) == frame_pointer_rtx             \
        !           774:           && GET_CODE (XEXP (ADDR, 1)) == CONST_INT)                   \
        !           775:     { rtx other_reg = XEXP (XEXP (ADDR, 0), 0);                                \
        !           776:       offset = INTVAL (XEXP (ADDR, 1));                                        \
        !           777:       regs = gen_rtx (PLUS, Pmode, stack_pointer_rtx, other_reg); }    \
        !           778:   if (offset >= 0)                                                     \
        !           779:     { int regno;                                                       \
        !           780:       extern char call_used_regs[];                                    \
        !           781:       for (regno = 16; regno < FIRST_PSEUDO_REGISTER; regno++)         \
        !           782:         if (regs_ever_live[regno] && ! call_used_regs[regno])          \
        !           783:           offset += 12;                                                        \
        !           784:       for (regno = 0; regno < 16; regno++)                             \
        !           785:        if (regs_ever_live[regno] && ! call_used_regs[regno])           \
        !           786:          offset += 4;                                                  \
        !           787:       offset -= 4;                                                     \
        !           788:       ADDR = plus_constant (regs, offset + (DEPTH)); } }               \
        !           789: 
        !           790: /* Addressing modes, and classification of registers for them.  */
        !           791: 
        !           792: #define HAVE_POST_INCREMENT
        !           793: /* #define HAVE_POST_DECREMENT */
        !           794: 
        !           795: #define HAVE_PRE_DECREMENT
        !           796: /* #define HAVE_PRE_INCREMENT */
        !           797: 
        !           798: /* Macros to check register numbers against specific register classes.  */
        !           799: 
        !           800: /* These assume that REGNO is a hard or pseudo reg number.
        !           801:    They give nonzero only if REGNO is a hard reg of the suitable class
        !           802:    or a pseudo reg currently allocated to a suitable hard reg.
        !           803:    Since they use reg_renumber, they are safe only once reg_renumber
        !           804:    has been allocated, which happens in local-alloc.c.  */
        !           805: 
        !           806: #define REGNO_OK_FOR_INDEX_P(REGNO) \
        !           807: ((REGNO) < 16 || (unsigned) reg_renumber[REGNO] < 16)
        !           808: #define REGNO_OK_FOR_BASE_P(REGNO) \
        !           809: (((REGNO) ^ 010) < 8 || (unsigned) (reg_renumber[REGNO] ^ 010) < 8)
        !           810: #define REGNO_OK_FOR_DATA_P(REGNO) \
        !           811: ((REGNO) < 8 || (unsigned) reg_renumber[REGNO] < 8)
        !           812: #define REGNO_OK_FOR_FP_P(REGNO) \
        !           813: (((REGNO) ^ 020) < 8 || (unsigned) (reg_renumber[REGNO] ^ 020) < 8)
        !           814: #define REGNO_OK_FOR_FPA_P(REGNO) \
        !           815: (((REGNO) >= 24 && (REGNO) < 56) || (reg_renumber[REGNO] >= 24 && reg_renumber[REGNO] < 56))
        !           816: 
        !           817: /* Now macros that check whether X is a register and also,
        !           818:    strictly, whether it is in a specified class.
        !           819: 
        !           820:    These macros are specific to the 68000, and may be used only
        !           821:    in code for printing assembler insns and in conditions for
        !           822:    define_optimization.  */
        !           823: 
        !           824: /* 1 if X is a data register.  */
        !           825: 
        !           826: #define DATA_REG_P(X) (REG_P (X) && REGNO_OK_FOR_DATA_P (REGNO (X)))
        !           827: 
        !           828: /* 1 if X is an fp register.  */
        !           829: 
        !           830: #define FP_REG_P(X) (REG_P (X) && REGNO_OK_FOR_FP_P (REGNO (X)))
        !           831: 
        !           832: /* 1 if X is an address register  */
        !           833: 
        !           834: #define ADDRESS_REG_P(X) (REG_P (X) && REGNO_OK_FOR_BASE_P (REGNO (X)))
        !           835: 
        !           836: /* 1 if X is a register in the Sun FPA.  */
        !           837: #define FPA_REG_P(X) (REG_P (X) && REGNO_OK_FOR_FPA_P (REGNO (X)))
        !           838: 
        !           839: /* Maximum number of registers that can appear in a valid memory address.  */
        !           840: 
        !           841: #define MAX_REGS_PER_ADDRESS 2
        !           842: 
        !           843: /* Recognize any constant value that is a valid address.  */
        !           844: 
        !           845: #define CONSTANT_ADDRESS_P(X)  CONSTANT_P (X)
        !           846: 
        !           847: /* Nonzero if the constant value X is a legitimate general operand.
        !           848:    It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.  */
        !           849: 
        !           850: #define LEGITIMATE_CONSTANT_P(X) 1
        !           851: 
        !           852: /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
        !           853:    and check its validity for a certain class.
        !           854:    We have two alternate definitions for each of them.
        !           855:    The usual definition accepts all pseudo regs; the other rejects
        !           856:    them unless they have been allocated suitable hard regs.
        !           857:    The symbol REG_OK_STRICT causes the latter definition to be used.
        !           858: 
        !           859:    Most source files want to accept pseudo regs in the hope that
        !           860:    they will get allocated to the class that the insn wants them to be in.
        !           861:    Source files for reload pass need to be strict.
        !           862:    After reload, it makes no difference, since pseudo regs have
        !           863:    been eliminated by then.  */
        !           864: 
        !           865: #ifndef REG_OK_STRICT
        !           866: 
        !           867: /* Nonzero if X is a hard reg that can be used as an index
        !           868:    or if it is a pseudo reg.  */
        !           869: #define REG_OK_FOR_INDEX_P(X) ((REGNO (X) ^ 020) >= 8)
        !           870: /* Nonzero if X is a hard reg that can be used as a base reg
        !           871:    or if it is a pseudo reg.  */
        !           872: #define REG_OK_FOR_BASE_P(X) ((REGNO (X) & ~027) != 0)
        !           873: 
        !           874: #else
        !           875: 
        !           876: /* Nonzero if X is a hard reg that can be used as an index.  */
        !           877: #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
        !           878: /* Nonzero if X is a hard reg that can be used as a base reg.  */
        !           879: #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
        !           880: 
        !           881: #endif
        !           882: 
        !           883: /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
        !           884:    that is a valid memory address for an instruction.
        !           885:    The MODE argument is the machine mode for the MEM expression
        !           886:    that wants to use this address.
        !           887: 
        !           888:    The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS.  */
        !           889: 
        !           890: #define INDIRECTABLE_1_ADDRESS_P(X)  \
        !           891:   (CONSTANT_ADDRESS_P (X)                                              \
        !           892:    || (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X))                   \
        !           893:    || ((GET_CODE (X) == PRE_DEC || GET_CODE (X) == POST_INC)           \
        !           894:        && REG_P (XEXP (X, 0))                                          \
        !           895:        && REG_OK_FOR_BASE_P (XEXP (X, 0)))                             \
        !           896:    || (GET_CODE (X) == PLUS                                            \
        !           897:        && REG_P (XEXP (X, 0)) && REG_OK_FOR_BASE_P (XEXP (X, 0))       \
        !           898:        && GET_CODE (XEXP (X, 1)) == CONST_INT                          \
        !           899:        && ((unsigned) INTVAL (XEXP (X, 1)) + 0x8000) < 0x10000))
        !           900: 
        !           901: #if 0
        !           902: /* This should replace the last two lines
        !           903:    except that Sun's assembler does not seem to handle such operands.  */
        !           904:        && (TARGET_68020 ? CONSTANT_ADDRESS_P (XEXP (X, 1))             \
        !           905:           : (GET_CODE (XEXP (X, 1)) == CONST_INT                       \
        !           906:              && ((unsigned) INTVAL (XEXP (X, 1)) + 0x8000) < 0x10000))))
        !           907: #endif
        !           908: 
        !           909: 
        !           910: #define GO_IF_NONINDEXED_ADDRESS(X, ADDR)  \
        !           911: { if (INDIRECTABLE_1_ADDRESS_P (X)) goto ADDR; }
        !           912: 
        !           913: #define GO_IF_INDEXABLE_BASE(X, ADDR)  \
        !           914: { if (GET_CODE (X) == LABEL_REF) goto ADDR;                            \
        !           915:   if (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X)) goto ADDR; }
        !           916: 
        !           917: #define GO_IF_INDEXING(X, ADDR)        \
        !           918: { if (GET_CODE (X) == PLUS && LEGITIMATE_INDEX_P (XEXP (X, 0)))                \
        !           919:     { GO_IF_INDEXABLE_BASE (XEXP (X, 1), ADDR); }                      \
        !           920:   if (GET_CODE (X) == PLUS && LEGITIMATE_INDEX_P (XEXP (X, 1)))                \
        !           921:     { GO_IF_INDEXABLE_BASE (XEXP (X, 0), ADDR); } }
        !           922: 
        !           923: #define GO_IF_INDEXED_ADDRESS(X, ADDR)  \
        !           924: { GO_IF_INDEXING (X, ADDR);                                            \
        !           925:   if (GET_CODE (X) == PLUS)                                            \
        !           926:     { if (GET_CODE (XEXP (X, 1)) == CONST_INT                          \
        !           927:          && (unsigned) INTVAL (XEXP (X, 1)) + 0x80 < 0x100)            \
        !           928:        { rtx go_temp = XEXP (X, 0); GO_IF_INDEXING (go_temp, ADDR); }  \
        !           929:       if (GET_CODE (XEXP (X, 0)) == CONST_INT                          \
        !           930:          && (unsigned) INTVAL (XEXP (X, 0)) + 0x80 < 0x100)            \
        !           931:        { rtx go_temp = XEXP (X, 1); GO_IF_INDEXING (go_temp, ADDR); } } }
        !           932: 
        !           933: #define LEGITIMATE_INDEX_REG_P(X)   \
        !           934:   ((GET_CODE (X) == REG && REG_OK_FOR_INDEX_P (X))     \
        !           935:    || (GET_CODE (X) == SIGN_EXTEND                     \
        !           936:        && GET_CODE (XEXP (X, 0)) == REG                        \
        !           937:        && GET_MODE (XEXP (X, 0)) == HImode             \
        !           938:        && REG_OK_FOR_INDEX_P (XEXP (X, 0))))
        !           939: 
        !           940: #define LEGITIMATE_INDEX_P(X)   \
        !           941:    (LEGITIMATE_INDEX_REG_P (X)                         \
        !           942:     || (TARGET_68020 && GET_CODE (X) == MULT           \
        !           943:        && LEGITIMATE_INDEX_REG_P (XEXP (X, 0))         \
        !           944:        && GET_CODE (XEXP (X, 1)) == CONST_INT          \
        !           945:        && (INTVAL (XEXP (X, 1)) == 2                   \
        !           946:            || INTVAL (XEXP (X, 1)) == 4                \
        !           947:            || INTVAL (XEXP (X, 1)) == 8)))
        !           948: 
        !           949: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR)  \
        !           950: { GO_IF_NONINDEXED_ADDRESS (X, ADDR);                  \
        !           951:   GO_IF_INDEXED_ADDRESS (X, ADDR); }
        !           952: 
        !           953: /* Try machine-dependent ways of modifying an illegitimate address
        !           954:    to be legitimate.  If we find one, return the new, valid address.
        !           955:    This macro is used in only one place: `memory_address' in explow.c.
        !           956: 
        !           957:    OLDX is the address as it was before break_out_memory_refs was called.
        !           958:    In some cases it is useful to look at this to decide what needs to be done.
        !           959: 
        !           960:    MODE and WIN are passed so that this macro can use
        !           961:    GO_IF_LEGITIMATE_ADDRESS.
        !           962: 
        !           963:    It is always safe for this macro to do nothing.  It exists to recognize
        !           964:    opportunities to optimize the output.
        !           965: 
        !           966:    For the 68000, we handle X+REG by loading X into a register R and
        !           967:    using R+REG.  R will go in an address reg and indexing will be used.
        !           968:    However, if REG is a broken-out memory address or multiplication,
        !           969:    nothing needs to be done because REG can certainly go in an address reg.  */
        !           970: 
        !           971: #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN)   \
        !           972: { register int ch = (X) != (OLDX);                                     \
        !           973:   if (GET_CODE (X) == PLUS)                                            \
        !           974:     { if (GET_CODE (XEXP (X, 0)) == MULT)                              \
        !           975:        ch = 1, XEXP (X, 0) = force_operand (XEXP (X, 0), 0);           \
        !           976:       if (GET_CODE (XEXP (X, 1)) == MULT)                              \
        !           977:        ch = 1, XEXP (X, 1) = force_operand (XEXP (X, 1), 0);           \
        !           978:       if (ch && GET_CODE (XEXP (X, 1)) == REG                          \
        !           979:          && GET_CODE (XEXP (X, 0)) == REG)                             \
        !           980:        return X;                                                       \
        !           981:       if (ch) { GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN); }             \
        !           982:       if (GET_CODE (XEXP (X, 0)) == REG                                        \
        !           983:               || (GET_CODE (XEXP (X, 0)) == SIGN_EXTEND                \
        !           984:                   && GET_CODE (XEXP (XEXP (X, 0), 0)) == REG           \
        !           985:                   && GET_MODE (XEXP (XEXP (X, 0), 0)) == HImode))      \
        !           986:        { register rtx temp = gen_reg_rtx (Pmode);                      \
        !           987:          register rtx val = force_operand (XEXP (X, 1), 0);            \
        !           988:          emit_move_insn (temp, val);                                   \
        !           989:          XEXP (X, 1) = temp;                                           \
        !           990:          return X; }                                                   \
        !           991:       else if (GET_CODE (XEXP (X, 1)) == REG                           \
        !           992:               || (GET_CODE (XEXP (X, 1)) == SIGN_EXTEND                \
        !           993:                   && GET_CODE (XEXP (XEXP (X, 1), 0)) == REG           \
        !           994:                   && GET_MODE (XEXP (XEXP (X, 1), 0)) == HImode))      \
        !           995:        { register rtx temp = gen_reg_rtx (Pmode);                      \
        !           996:          register rtx val = force_operand (XEXP (X, 0), 0);            \
        !           997:          emit_move_insn (temp, val);                                   \
        !           998:          XEXP (X, 0) = temp;                                           \
        !           999:          return X; }}}
        !          1000: 
        !          1001: /* Go to LABEL if ADDR (a legitimate address expression)
        !          1002:    has an effect that depends on the machine mode it is used for.
        !          1003:    On the 68000, only predecrement and postincrement address depend thus
        !          1004:    (the amount of decrement or increment being the length of the operand).  */
        !          1005: 
        !          1006: #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)       \
        !          1007:  if (GET_CODE (ADDR) == POST_INC || GET_CODE (ADDR) == PRE_DEC) goto LABEL
        !          1008: 
        !          1009: /* Specify the machine mode that this machine uses
        !          1010:    for the index in the tablejump instruction.  */
        !          1011: #define CASE_VECTOR_MODE HImode
        !          1012: 
        !          1013: /* Define this if the tablejump instruction expects the table
        !          1014:    to contain offsets from the address of the table.
        !          1015:    Do not define this if the table should contain absolute addresses.  */
        !          1016: #define CASE_VECTOR_PC_RELATIVE
        !          1017: 
        !          1018: /* Specify the tree operation to be used to convert reals to integers.  */
        !          1019: #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
        !          1020: 
        !          1021: /* This is the kind of divide that is easiest to do in the general case.  */
        !          1022: #define EASY_DIV_EXPR TRUNC_DIV_EXPR
        !          1023: 
        !          1024: /* Define this as 1 if `char' should by default be signed; else as 0.  */
        !          1025: #define DEFAULT_SIGNED_CHAR 1
        !          1026: 
        !          1027: /* Max number of bytes we can move from memory to memory
        !          1028:    in one reasonably fast instruction.  */
        !          1029: #define MOVE_MAX 4
        !          1030: 
        !          1031: /* Define this if zero-extension is slow (more than one real instruction).  */
        !          1032: #define SLOW_ZERO_EXTEND
        !          1033: 
        !          1034: /* Nonzero if access to memory by bytes is slow and undesirable.  */
        !          1035: #define SLOW_BYTE_ACCESS 0
        !          1036: 
        !          1037: /* Define if shifts truncate the shift count
        !          1038:    which implies one can omit a sign-extension or zero-extension
        !          1039:    of a shift count.  */
        !          1040: #define SHIFT_COUNT_TRUNCATED
        !          1041: 
        !          1042: /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
        !          1043:    is done just by pretending it is already truncated.  */
        !          1044: #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
        !          1045: 
        !          1046: /* We assume that the store-condition-codes instructions store 0 for false
        !          1047:    and some other value for true.  This is the value stored for true.  */
        !          1048: 
        !          1049: #define STORE_FLAG_VALUE -1
        !          1050: 
        !          1051: /* When a prototype says `char' or `short', really pass an `int'.  */
        !          1052: #define PROMOTE_PROTOTYPES
        !          1053: 
        !          1054: /* Specify the machine mode that pointers have.
        !          1055:    After generation of rtl, the compiler makes no further distinction
        !          1056:    between pointers and any other objects of this machine mode.  */
        !          1057: #define Pmode SImode
        !          1058: 
        !          1059: /* A function address in a call instruction
        !          1060:    is a byte address (for indexing purposes)
        !          1061:    so give the MEM rtx a byte's mode.  */
        !          1062: #define FUNCTION_MODE QImode
        !          1063: 
        !          1064: /* Compute the cost of computing a constant rtl expression RTX
        !          1065:    whose rtx-code is CODE.  The body of this macro is a portion
        !          1066:    of a switch statement.  If the code is computed here,
        !          1067:    return it with a return statement.  Otherwise, break from the switch.  */
        !          1068: 
        !          1069: #define CONST_COSTS(RTX,CODE) \
        !          1070:   case CONST_INT:                                              \
        !          1071:     /* Constant zero is super cheap due to clr instruction.  */        \
        !          1072:     if (RTX == const0_rtx) return 0;                           \
        !          1073:     if ((unsigned) INTVAL (RTX) < 077) return 1;               \
        !          1074:   case CONST:                                                  \
        !          1075:   case LABEL_REF:                                              \
        !          1076:   case SYMBOL_REF:                                             \
        !          1077:     return 3;                                                  \
        !          1078:   case CONST_DOUBLE:                                           \
        !          1079:     return 5;
        !          1080: 
        !          1081: /* Tell final.c how to eliminate redundant test instructions.  */
        !          1082: 
        !          1083: /* Here we define machine-dependent flags and fields in cc_status
        !          1084:    (see `conditions.h').  */
        !          1085: 
        !          1086: /* Set if the cc value is actually in the 68881, so a floating point
        !          1087:    conditional branch must be output.  */
        !          1088: #define CC_IN_68881 04000
        !          1089: 
        !          1090: /* Store in cc_status the expressions
        !          1091:    that the condition codes will describe
        !          1092:    after execution of an instruction whose pattern is EXP.
        !          1093:    Do not alter them if the instruction would not alter the cc's.  */
        !          1094: 
        !          1095: /* On the 68000, all the insns to store in an address register
        !          1096:    fail to set the cc's.  However, in some cases these instructions
        !          1097:    can make it possibly invalid to use the saved cc's.  In those
        !          1098:    cases we clear out some or all of the saved cc's so they won't be used.  */
        !          1099: 
        !          1100: #define NOTICE_UPDATE_CC(EXP, INSN) \
        !          1101: {                                                              \
        !          1102:   /* If the cc is being set from the fpa and the
        !          1103:      expression is not an explicit floating point
        !          1104:      test instruction (which has code to deal with
        !          1105:      this), reinit the CC */                                   \
        !          1106:   if (((cc_status.value1 && FPA_REG_P (cc_status.value1))      \
        !          1107:        || (cc_status.value2 && FPA_REG_P (cc_status.value2)))  \
        !          1108:       && !(GET_CODE(EXP) == PARALLEL                           \
        !          1109:           && GET_CODE (XVECEXP(EXP, 0, 0)) == SET              \
        !          1110:           && XEXP (XVECEXP (EXP, 0, 0), 0) == cc0_rtx))        \
        !          1111:     { CC_STATUS_INIT; }                                                \
        !          1112:   else if (GET_CODE (EXP) == SET)                              \
        !          1113:     { if (ADDRESS_REG_P (SET_DEST (EXP)))                      \
        !          1114:        { if (cc_status.value1                                  \
        !          1115:              && reg_overlap_mentioned_p (SET_DEST (EXP), cc_status.value1)) \
        !          1116:            cc_status.value1 = 0;                               \
        !          1117:          if (cc_status.value2                                  \
        !          1118:              && reg_overlap_mentioned_p (SET_DEST (EXP), cc_status.value2)) \
        !          1119:            cc_status.value2 = 0; }                             \
        !          1120:       else if (!FP_REG_P (SET_DEST (EXP))                      \
        !          1121:               && SET_DEST (EXP) != cc0_rtx                     \
        !          1122:               && (FP_REG_P (SET_SRC (EXP))                     \
        !          1123:                   || GET_CODE (SET_SRC (EXP)) == FIX           \
        !          1124:                   || GET_CODE (SET_SRC (EXP)) == FLOAT_TRUNCATE \
        !          1125:                   || GET_CODE (SET_SRC (EXP)) == FLOAT_EXTEND)) \
        !          1126:        { CC_STATUS_INIT; }                                     \
        !          1127:       /* A pair of move insns doesn't produce a useful overall cc.  */ \
        !          1128:       else if (!FP_REG_P (SET_DEST (EXP))                      \
        !          1129:               && !FP_REG_P (SET_SRC (EXP))                     \
        !          1130:               && GET_MODE_SIZE (GET_MODE (SET_SRC (EXP))) > 4  \
        !          1131:               && (GET_CODE (SET_SRC (EXP)) == REG              \
        !          1132:                   || GET_CODE (SET_SRC (EXP)) == MEM           \
        !          1133:                   || GET_CODE (SET_SRC (EXP)) == CONST_DOUBLE))\
        !          1134:        { CC_STATUS_INIT; }                                     \
        !          1135:       else if (GET_CODE (SET_SRC (EXP)) == CALL)               \
        !          1136:        { CC_STATUS_INIT; }                                     \
        !          1137:       else if (XEXP (EXP, 0) != pc_rtx)                                \
        !          1138:        { cc_status.flags = 0;                                  \
        !          1139:          cc_status.value1 = XEXP (EXP, 0);                     \
        !          1140:          cc_status.value2 = XEXP (EXP, 1); } }                 \
        !          1141:   else if (GET_CODE (EXP) == PARALLEL                          \
        !          1142:           && GET_CODE (XVECEXP (EXP, 0, 0)) == SET)            \
        !          1143:     {                                                          \
        !          1144:       if (ADDRESS_REG_P (XEXP (XVECEXP (EXP, 0, 0), 0)))       \
        !          1145:        CC_STATUS_INIT;                                         \
        !          1146:       else if (XEXP (XVECEXP (EXP, 0, 0), 0) != pc_rtx)                \
        !          1147:        { cc_status.flags = 0;                                  \
        !          1148:          cc_status.value1 = XEXP (XVECEXP (EXP, 0, 0), 0);     \
        !          1149:          cc_status.value2 = XEXP (XVECEXP (EXP, 0, 0), 1); } } \
        !          1150:   else CC_STATUS_INIT;                                         \
        !          1151:   if (cc_status.value2 != 0                                    \
        !          1152:       && ADDRESS_REG_P (cc_status.value2)                      \
        !          1153:       && GET_MODE (cc_status.value2) == QImode)                        \
        !          1154:     CC_STATUS_INIT;                                            \
        !          1155:   if (cc_status.value2 != 0                                    \
        !          1156:       && !(cc_status.value1 && FPA_REG_P (cc_status.value1)))  \
        !          1157:     switch (GET_CODE (cc_status.value2))                       \
        !          1158:       { case PLUS: case MINUS: case MULT: case UMULT:          \
        !          1159:        case DIV: case UDIV: case MOD: case UMOD: case NEG:     \
        !          1160:        case ASHIFT: case LSHIFT: case ASHIFTRT: case LSHIFTRT: \
        !          1161:        case ROTATE: case ROTATERT:                             \
        !          1162:          if (GET_MODE (cc_status.value2) != VOIDmode)          \
        !          1163:            cc_status.flags |= CC_NO_OVERFLOW;                  \
        !          1164:          break;                                                \
        !          1165:        case ZERO_EXTEND:                                       \
        !          1166:          /* (SET r1 (ZERO_EXTEND r2)) on this machine
        !          1167:             ends with a move insn moving r2 in r2's mode.
        !          1168:             Thus, the cc's are set for r2.
        !          1169:             This can set N bit spuriously. */                  \
        !          1170:          cc_status.flags |= CC_NOT_NEGATIVE; }                 \
        !          1171:   if (cc_status.value1 && GET_CODE (cc_status.value1) == REG   \
        !          1172:       && cc_status.value2                                      \
        !          1173:       && reg_overlap_mentioned_p (cc_status.value1, cc_status.value2)) \
        !          1174:     cc_status.value2 = 0;                                      \
        !          1175:   if (((cc_status.value1 && FP_REG_P (cc_status.value1))       \
        !          1176:        || (cc_status.value2 && FP_REG_P (cc_status.value2)))   \
        !          1177:       && !((cc_status.value1 && FPA_REG_P (cc_status.value1))  \
        !          1178:           || (cc_status.value2 && FPA_REG_P (cc_status.value2)))) \
        !          1179:     cc_status.flags = CC_IN_68881; }
        !          1180: 
        !          1181: #define OUTPUT_JUMP(NORMAL, FLOAT, NO_OV)  \
        !          1182: { if (cc_prev_status.flags & CC_IN_68881)                      \
        !          1183:     return FLOAT;                                              \
        !          1184:   if (cc_prev_status.flags & CC_NO_OVERFLOW)                   \
        !          1185:     return NO_OV;                                              \
        !          1186:   return NORMAL; }
        !          1187: 
        !          1188: /* Control the assembler format that we output.  */
        !          1189: 
        !          1190: /* Output at beginning of assembler file.  */
        !          1191: 
        !          1192: #define ASM_FILE_START(FILE)   \
        !          1193:   fprintf (FILE, "#NO_APP\n");
        !          1194: 
        !          1195: /* Output to assembler file text saying following lines
        !          1196:    may contain character constants, extra white space, comments, etc.  */
        !          1197: 
        !          1198: #define ASM_APP_ON "#APP\n"
        !          1199: 
        !          1200: /* Output to assembler file text saying following lines
        !          1201:    no longer contain unusual constructs.  */
        !          1202: 
        !          1203: #define ASM_APP_OFF "#NO_APP\n"
        !          1204: 
        !          1205: /* Output before read-only data.  */
        !          1206: 
        !          1207: #define TEXT_SECTION_ASM_OP ".text"
        !          1208: 
        !          1209: /* Output before writable data.  */
        !          1210: 
        !          1211: #define DATA_SECTION_ASM_OP ".data"
        !          1212: 
        !          1213: /* How to refer to registers in assembler output.
        !          1214:    This sequence is indexed by compiler's hard-register-number (see above).  */
        !          1215: 
        !          1216: #define REGISTER_NAMES \
        !          1217: {"d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7",       \
        !          1218:  "a0", "a1", "a2", "a3", "a4", "a5", "a6", "sp",       \
        !          1219:  "fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7", \
        !          1220:  "fpa0", "fpa1", "fpa2", "fpa3", "fpa4", "fpa5", "fpa6", "fpa7", \
        !          1221:  "fpa8", "fpa9", "fpa10", "fpa11", "fpa12", "fpa13", "fpa14", "fpa15", \
        !          1222:  "fpa16", "fpa17", "fpa18", "fpa19", "fpa20", "fpa21", "fpa22", "fpa23", \
        !          1223:  "fpa24", "fpa25", "fpa26", "fpa27", "fpa28", "fpa29", "fpa30", "fpa31", }
        !          1224: 
        !          1225: /* How to renumber registers for dbx and gdb.
        !          1226:    On the Sun-3, the floating point registers have numbers
        !          1227:    18 to 25, not 16 to 23 as they do in the compiler.  */
        !          1228: 
        !          1229: #define DBX_REGISTER_NUMBER(REGNO) ((REGNO) < 16 ? (REGNO) : (REGNO) + 2)
        !          1230: 
        !          1231: /* This is how to output the definition of a user-level label named NAME,
        !          1232:    such as the label on a static function or variable NAME.  */
        !          1233: 
        !          1234: #define ASM_OUTPUT_LABEL(FILE,NAME)    \
        !          1235:   do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
        !          1236: 
        !          1237: /* This is how to output a command to make the user-level label named NAME
        !          1238:    defined for reference from other files.  */
        !          1239: 
        !          1240: #define ASM_GLOBALIZE_LABEL(FILE,NAME) \
        !          1241:   do { fputs (".globl ", FILE); assemble_name (FILE, NAME); fputs ("\n", FILE);} while (0)
        !          1242: 
        !          1243: /* This is how to output a reference to a user-level label named NAME.
        !          1244:    `assemble_name' uses this.  */
        !          1245: 
        !          1246: #define ASM_OUTPUT_LABELREF(FILE,NAME) \
        !          1247:   fprintf (FILE, "_%s", NAME)
        !          1248: 
        !          1249: /* This is how to output an internal numbered label where
        !          1250:    PREFIX is the class of label and NUM is the number within the class.  */
        !          1251: 
        !          1252: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)     \
        !          1253:   fprintf (FILE, "%s%d:\n", PREFIX, NUM)
        !          1254: 
        !          1255: /* This is how to store into the string LABEL
        !          1256:    the symbol_ref name of an internal numbered label where
        !          1257:    PREFIX is the class of label and NUM is the number within the class.
        !          1258:    This is suitable for output with `assemble_name'.  */
        !          1259: 
        !          1260: #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)  \
        !          1261:   sprintf (LABEL, "*%s%d", PREFIX, NUM)
        !          1262: 
        !          1263: /* This is how to output an assembler line defining a `double' constant.  */
        !          1264: 
        !          1265: #define ASM_OUTPUT_DOUBLE(FILE,VALUE)  \
        !          1266:   fprintf (FILE, "\t.double 0r%.20g\n", (VALUE))
        !          1267: 
        !          1268: /* This is how to output an assembler line defining a `float' constant.  */
        !          1269: 
        !          1270: #define ASM_OUTPUT_FLOAT(FILE,VALUE)  \
        !          1271: do { union { float f; long l;} tem;                    \
        !          1272:      tem.f = (VALUE);                                  \
        !          1273:      fprintf (FILE, "\t.long 0x%x\n", tem.l);  \
        !          1274:    } while (0)
        !          1275: 
        !          1276: /* This is how to output an assembler line defining an `int' constant.  */
        !          1277: 
        !          1278: #define ASM_OUTPUT_INT(FILE,VALUE)  \
        !          1279: ( fprintf (FILE, "\t.long "),                  \
        !          1280:   output_addr_const (FILE, (VALUE)),           \
        !          1281:   fprintf (FILE, "\n"))
        !          1282: 
        !          1283: /* Likewise for `char' and `short' constants.  */
        !          1284: 
        !          1285: #define ASM_OUTPUT_SHORT(FILE,VALUE)  \
        !          1286: ( fprintf (FILE, "\t.word "),                  \
        !          1287:   output_addr_const (FILE, (VALUE)),           \
        !          1288:   fprintf (FILE, "\n"))
        !          1289: 
        !          1290: #define ASM_OUTPUT_CHAR(FILE,VALUE)  \
        !          1291: ( fprintf (FILE, "\t.byte "),                  \
        !          1292:   output_addr_const (FILE, (VALUE)),           \
        !          1293:   fprintf (FILE, "\n"))
        !          1294: 
        !          1295: /* This is how to output an assembler line for a numeric constant byte.  */
        !          1296: 
        !          1297: #define ASM_OUTPUT_BYTE(FILE,VALUE)  \
        !          1298:   fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
        !          1299: 
        !          1300: /* This is how to output an insn to push a register on the stack.
        !          1301:    It need not be very fast code.  */
        !          1302: 
        !          1303: #define ASM_OUTPUT_REG_PUSH(FILE,REGNO)  \
        !          1304:   fprintf (FILE, "\tmovel %s,sp@-\n", reg_names[REGNO])
        !          1305: 
        !          1306: /* This is how to output an insn to pop a register from the stack.
        !          1307:    It need not be very fast code.  */
        !          1308: 
        !          1309: #define ASM_OUTPUT_REG_POP(FILE,REGNO)  \
        !          1310:   fprintf (FILE, "\tmovel sp@+,%s\n", reg_names[REGNO])
        !          1311: 
        !          1312: /* This is how to output an element of a case-vector that is absolute.
        !          1313:    (The 68000 does not use such vectors,
        !          1314:    but we must define this macro anyway.)  */
        !          1315: 
        !          1316: #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
        !          1317:   fprintf (FILE, "\t.long L%d\n", VALUE)
        !          1318: 
        !          1319: /* This is how to output an element of a case-vector that is relative.  */
        !          1320: 
        !          1321: #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL)  \
        !          1322:   fprintf (FILE, "\t.word L%d-L%d\n", VALUE, REL)
        !          1323: 
        !          1324: /* This is how to output an assembler line
        !          1325:    that says to advance the location counter
        !          1326:    to a multiple of 2**LOG bytes.  */
        !          1327: 
        !          1328: #define ASM_OUTPUT_ALIGN(FILE,LOG)     \
        !          1329:   if ((LOG) == 1)                      \
        !          1330:     fprintf (FILE, "\t.even\n");       \
        !          1331:   else if ((LOG) != 0)                 \
        !          1332:     abort ();
        !          1333: 
        !          1334: #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
        !          1335:   fprintf (FILE, "\t.skip %d\n", (SIZE))
        !          1336: 
        !          1337: /* This says how to output an assembler line
        !          1338:    to define a global common symbol.  */
        !          1339: 
        !          1340: #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
        !          1341: ( fputs (".comm ", (FILE)),                    \
        !          1342:   assemble_name ((FILE), (NAME)),              \
        !          1343:   fprintf ((FILE), ",%d\n", (ROUNDED)))
        !          1344: 
        !          1345: /* This says how to output an assembler line
        !          1346:    to define a local common symbol.  */
        !          1347: 
        !          1348: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
        !          1349: ( fputs (".lcomm ", (FILE)),                   \
        !          1350:   assemble_name ((FILE), (NAME)),              \
        !          1351:   fprintf ((FILE), ",%d\n", (ROUNDED)))
        !          1352: 
        !          1353: /* Store in OUTPUT a string (made with alloca) containing
        !          1354:    an assembler-name for a local static variable named NAME.
        !          1355:    LABELNO is an integer which is different for each call.  */
        !          1356: 
        !          1357: #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
        !          1358: ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10),   \
        !          1359:   sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
        !          1360: 
        !          1361: /* Define the parentheses used to group arithmetic operations
        !          1362:    in assembler code.  */
        !          1363: 
        !          1364: #define ASM_OPEN_PAREN "("
        !          1365: #define ASM_CLOSE_PAREN ")"
        !          1366: 
        !          1367: /* Define results of standard character escape sequences.  */
        !          1368: #define TARGET_BELL 007
        !          1369: #define TARGET_BS 010
        !          1370: #define TARGET_TAB 011
        !          1371: #define TARGET_NEWLINE 012
        !          1372: #define TARGET_VT 013
        !          1373: #define TARGET_FF 014
        !          1374: #define TARGET_CR 015
        !          1375: 
        !          1376: /* Output a float value (represented as a C double) as an immediate operand.
        !          1377:    This macro is a 68k-specific macro.  */
        !          1378: #define ASM_OUTPUT_FLOAT_OPERAND(FILE,VALUE)                           \
        !          1379:   fprintf (FILE, "#0r%.9g", (VALUE))
        !          1380: 
        !          1381: /* Output a double value (represented as a C double) as an immediate operand.
        !          1382:    This macro is a 68k-specific macro.  */
        !          1383: #define ASM_OUTPUT_DOUBLE_OPERAND(FILE,VALUE)                          \
        !          1384:   fprintf (FILE, "#0r%.20g", (VALUE))
        !          1385: 
        !          1386: /* Print operand X (an rtx) in assembler syntax to file FILE.
        !          1387:    CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
        !          1388:    For `%' followed by punctuation, CODE is the punctuation and X is null.
        !          1389: 
        !          1390:    On the 68000, we use several CODE characters:
        !          1391:    '.' for dot needed in Motorola-style opcode names.
        !          1392:    '-' for an operand pushing on the stack:
        !          1393:        sp@-, -(sp) or -(%sp) depending on the style of syntax.
        !          1394:    '+' for an operand pushing on the stack:
        !          1395:        sp@+, (sp)+ or (%sp)+ depending on the style of syntax.
        !          1396:    '@' for a reference to the top word on the stack:
        !          1397:        sp@, (sp) or (%sp) depending on the style of syntax.
        !          1398:    '#' for an immediate operand prefix (# in MIT and Motorola syntax
        !          1399:        but & in SGS syntax).
        !          1400:    '!' for the cc register (used in an `and to cc' insn).
        !          1401: 
        !          1402:    'b' for byte insn (no effect, on the Sun; this is for the ISI).
        !          1403:    'd' to force memory addressing to be absolute, not relative.
        !          1404:    'f' for float insn (print a CONST_DOUBLE as a float rather than in hex)
        !          1405:    'w' for FPA insn (print a CONST_DOUBLE as a SunFPA constant rather
        !          1406:        than directly).  Second part of 'y' below.
        !          1407:    'x' for float insn (print a CONST_DOUBLE as a float rather than in hex),
        !          1408:        or print pair of registers as rx:ry.
        !          1409:    'y' for a FPA insn (print pair of registers as rx:ry).  This also outputs
        !          1410:        CONST_DOUBLE's as SunFPA constant RAM registers if
        !          1411:        possible, so it should not be used except for the SunFPA. */
        !          1412: 
        !          1413: #define PRINT_OPERAND_PUNCT_VALID_P(CODE)                              \
        !          1414:   ((CODE) == '.' || (CODE) == '#' || (CODE) == '-'                     \
        !          1415:    || (CODE) == '+' || (CODE) == '@' || (CODE) == '!')
        !          1416: 
        !          1417: #define PRINT_OPERAND(FILE, X, CODE)  \
        !          1418: { int i;                                                               \
        !          1419:   if (CODE == '.') ;                                                   \
        !          1420:   else if (CODE == '#') fprintf (FILE, "#");                           \
        !          1421:   else if (CODE == '-') fprintf (FILE, "sp@-");                                \
        !          1422:   else if (CODE == '+') fprintf (FILE, "sp@+");                                \
        !          1423:   else if (CODE == '@') fprintf (FILE, "sp@");                         \
        !          1424:   else if (CODE == '!') fprintf (FILE, "cc");                          \
        !          1425:   else if (GET_CODE (X) == REG)                                                \
        !          1426:     { if (REGNO (X) < 16 && (CODE == 'y' || CODE == 'x') && GET_MODE (X) == DFmode)    \
        !          1427:         fprintf (FILE, "%s:%s", reg_names[REGNO (X)], reg_names[REGNO (X)+1]); \
        !          1428:       else                                                             \
        !          1429:         fprintf (FILE, "%s", reg_names[REGNO (X)]);                    \
        !          1430:     }                                                                  \
        !          1431:   else if (GET_CODE (X) == MEM)                                                \
        !          1432:     {                                                                  \
        !          1433:       output_address (XEXP (X, 0));                                    \
        !          1434:       if (CODE == 'd' && ! TARGET_68020                                        \
        !          1435:          && CONSTANT_ADDRESS_P (XEXP (X, 0)))                          \
        !          1436:        fprintf (FILE, ":l");                                           \
        !          1437:     }                                                                  \
        !          1438:   else if ((CODE == 'y' || CODE == 'w')                                        \
        !          1439:           && GET_CODE(X) == CONST_DOUBLE                               \
        !          1440:           && (i = standard_sun_fpa_constant_p (X)))                    \
        !          1441:     fprintf (FILE, "%%%d", i & 0x1ff);                                 \
        !          1442:   else if (GET_CODE (X) == CONST_DOUBLE && GET_MODE (X) == SFmode)     \
        !          1443:     { union { double d; int i[2]; } u;                                 \
        !          1444:       union { float f; int i; } u1;                                    \
        !          1445:       u.i[0] = CONST_DOUBLE_LOW (X); u.i[1] = CONST_DOUBLE_HIGH (X);   \
        !          1446:       u1.f = u.d;                                                      \
        !          1447:       if (CODE == 'f')                                                 \
        !          1448:        ASM_OUTPUT_FLOAT_OPERAND (FILE, u1.f);                          \
        !          1449:       else                                                             \
        !          1450:         fprintf (FILE, "#0x%x", u1.i); }                               \
        !          1451:   else if (GET_CODE (X) == CONST_DOUBLE && GET_MODE (X) != DImode)     \
        !          1452:     { union { double d; int i[2]; } u;                                 \
        !          1453:       u.i[0] = CONST_DOUBLE_LOW (X); u.i[1] = CONST_DOUBLE_HIGH (X);   \
        !          1454:       ASM_OUTPUT_DOUBLE_OPERAND (FILE, u.d); }                         \
        !          1455:   else { putc ('#', FILE); output_addr_const (FILE, X); }}
        !          1456: 
        !          1457: /* Note that this contains a kludge that knows that the only reason
        !          1458:    we have an address (plus (label_ref...) (reg...))
        !          1459:    is in the insn before a tablejump, and we know that m68k.md
        !          1460:    generates a label LInnn: on such an insn.  */
        !          1461: #define PRINT_OPERAND_ADDRESS(FILE, ADDR)  \
        !          1462: { register rtx reg1, reg2, breg, ireg;                                 \
        !          1463:   register rtx addr = ADDR;                                            \
        !          1464:   rtx offset;                                                          \
        !          1465:   switch (GET_CODE (addr))                                             \
        !          1466:     {                                                                  \
        !          1467:     case REG:                                                          \
        !          1468:       fprintf (FILE, "%s@", reg_names[REGNO (addr)]);                  \
        !          1469:       break;                                                           \
        !          1470:     case PRE_DEC:                                                      \
        !          1471:       fprintf (FILE, "%s@-", reg_names[REGNO (XEXP (addr, 0))]);       \
        !          1472:       break;                                                           \
        !          1473:     case POST_INC:                                                     \
        !          1474:       fprintf (FILE, "%s@+", reg_names[REGNO (XEXP (addr, 0))]);       \
        !          1475:       break;                                                           \
        !          1476:     case PLUS:                                                         \
        !          1477:       reg1 = 0;        reg2 = 0;                                               \
        !          1478:       ireg = 0;        breg = 0;                                               \
        !          1479:       offset = 0;                                                      \
        !          1480:       if (CONSTANT_ADDRESS_P (XEXP (addr, 0)))                         \
        !          1481:        {                                                               \
        !          1482:          offset = XEXP (addr, 0);                                      \
        !          1483:          addr = XEXP (addr, 1);                                        \
        !          1484:        }                                                               \
        !          1485:       else if (CONSTANT_ADDRESS_P (XEXP (addr, 1)))                    \
        !          1486:        {                                                               \
        !          1487:          offset = XEXP (addr, 1);                                      \
        !          1488:          addr = XEXP (addr, 0);                                        \
        !          1489:        }                                                               \
        !          1490:       if (GET_CODE (addr) != PLUS) ;                                   \
        !          1491:       else if (GET_CODE (XEXP (addr, 0)) == SIGN_EXTEND)               \
        !          1492:        {                                                               \
        !          1493:          reg1 = XEXP (addr, 0);                                        \
        !          1494:          addr = XEXP (addr, 1);                                        \
        !          1495:        }                                                               \
        !          1496:       else if (GET_CODE (XEXP (addr, 1)) == SIGN_EXTEND)               \
        !          1497:        {                                                               \
        !          1498:          reg1 = XEXP (addr, 1);                                        \
        !          1499:          addr = XEXP (addr, 0);                                        \
        !          1500:        }                                                               \
        !          1501:       else if (GET_CODE (XEXP (addr, 0)) == MULT)                      \
        !          1502:        {                                                               \
        !          1503:          reg1 = XEXP (addr, 0);                                        \
        !          1504:          addr = XEXP (addr, 1);                                        \
        !          1505:        }                                                               \
        !          1506:       else if (GET_CODE (XEXP (addr, 1)) == MULT)                      \
        !          1507:        {                                                               \
        !          1508:          reg1 = XEXP (addr, 1);                                        \
        !          1509:          addr = XEXP (addr, 0);                                        \
        !          1510:        }                                                               \
        !          1511:       else if (GET_CODE (XEXP (addr, 0)) == REG)                       \
        !          1512:        {                                                               \
        !          1513:          reg1 = XEXP (addr, 0);                                        \
        !          1514:          addr = XEXP (addr, 1);                                        \
        !          1515:        }                                                               \
        !          1516:       else if (GET_CODE (XEXP (addr, 1)) == REG)                       \
        !          1517:        {                                                               \
        !          1518:          reg1 = XEXP (addr, 1);                                        \
        !          1519:          addr = XEXP (addr, 0);                                        \
        !          1520:        }                                                               \
        !          1521:       if (GET_CODE (addr) == REG || GET_CODE (addr) == MULT            \
        !          1522:          || GET_CODE (addr) == SIGN_EXTEND)                            \
        !          1523:        { if (reg1 == 0) reg1 = addr; else reg2 = addr; addr = 0; }     \
        !          1524: /*  for OLD_INDEXING                                                   \
        !          1525:       else if (GET_CODE (addr) == PLUS)                                        \
        !          1526:        {                                                               \
        !          1527:          if (GET_CODE (XEXP (addr, 0)) == REG)                         \
        !          1528:            {                                                           \
        !          1529:              reg2 = XEXP (addr, 0);                                    \
        !          1530:              addr = XEXP (addr, 1);                                    \
        !          1531:            }                                                           \
        !          1532:          else if (GET_CODE (XEXP (addr, 1)) == REG)                    \
        !          1533:            {                                                           \
        !          1534:              reg2 = XEXP (addr, 1);                                    \
        !          1535:              addr = XEXP (addr, 0);                                    \
        !          1536:            }                                                           \
        !          1537:        }                                                               \
        !          1538:   */                                                                   \
        !          1539:       if (offset != 0) { if (addr != 0) abort (); addr = offset; }     \
        !          1540:       if ((reg1 && (GET_CODE (reg1) == SIGN_EXTEND                     \
        !          1541:                    || GET_CODE (reg1) == MULT))                        \
        !          1542:          || (reg2 != 0 && REGNO_OK_FOR_BASE_P (REGNO (reg2))))         \
        !          1543:        { breg = reg2; ireg = reg1; }                                   \
        !          1544:       else if (reg1 != 0 && REGNO_OK_FOR_BASE_P (REGNO (reg1)))                \
        !          1545:        { breg = reg1; ireg = reg2; }                                   \
        !          1546:       if (ireg != 0 && breg == 0 && GET_CODE (addr) == LABEL_REF)      \
        !          1547:         { int scale = 1;                                               \
        !          1548:          if (GET_CODE (ireg) == MULT)                                  \
        !          1549:            { scale = INTVAL (XEXP (ireg, 1));                          \
        !          1550:              ireg = XEXP (ireg, 0); }                                  \
        !          1551:          if (GET_CODE (ireg) == SIGN_EXTEND)                           \
        !          1552:            fprintf (FILE, "pc@(L%d-LI%d-2:b,%s:w",                     \
        !          1553:                     CODE_LABEL_NUMBER (XEXP (addr, 0)),                \
        !          1554:                     CODE_LABEL_NUMBER (XEXP (addr, 0)),                \
        !          1555:                     reg_names[REGNO (XEXP (ireg, 0))]);                \
        !          1556:          else                                                          \
        !          1557:            fprintf (FILE, "pc@(L%d-LI%d-2:b,%s:l",                     \
        !          1558:                     CODE_LABEL_NUMBER (XEXP (addr, 0)),                \
        !          1559:                     CODE_LABEL_NUMBER (XEXP (addr, 0)),                \
        !          1560:                     reg_names[REGNO (ireg)]);                          \
        !          1561:          if (scale != 1) fprintf (FILE, ":%d", scale);                 \
        !          1562:          putc (')', FILE);                                             \
        !          1563:          break; }                                                      \
        !          1564:       if (breg != 0 && ireg == 0 && GET_CODE (addr) == LABEL_REF)      \
        !          1565:         { fprintf (FILE, "pc@(L%d-LI%d-2:b,%s:l",                      \
        !          1566:                   CODE_LABEL_NUMBER (XEXP (addr, 0)),                  \
        !          1567:                   CODE_LABEL_NUMBER (XEXP (addr, 0)),                  \
        !          1568:                   reg_names[REGNO (breg)]);                            \
        !          1569:          putc (')', FILE);                                             \
        !          1570:          break; }                                                      \
        !          1571:       if (ireg != 0 || breg != 0)                                      \
        !          1572:        { int scale = 1;                                                \
        !          1573:          if (breg == 0)                                                \
        !          1574:            abort ();                                                   \
        !          1575:          if (addr && GET_CODE (addr) == LABEL_REF) abort ();           \
        !          1576:          fprintf (FILE, "%s@(", reg_names[REGNO (breg)]);              \
        !          1577:          if (addr != 0)                                                \
        !          1578:            output_addr_const (FILE, addr);                             \
        !          1579:          if (addr != 0 && ireg != 0)                                   \
        !          1580:            putc (',', FILE);                                           \
        !          1581:          if (ireg != 0 && GET_CODE (ireg) == MULT)                     \
        !          1582:            { scale = INTVAL (XEXP (ireg, 1));                          \
        !          1583:              ireg = XEXP (ireg, 0); }                                  \
        !          1584:          if (ireg != 0 && GET_CODE (ireg) == SIGN_EXTEND)              \
        !          1585:            fprintf (FILE, "%s:w", reg_names[REGNO (XEXP (ireg, 0))]);  \
        !          1586:          else if (ireg != 0)                                           \
        !          1587:            fprintf (FILE, "%s:l", reg_names[REGNO (ireg)]);            \
        !          1588:          if (scale != 1) fprintf (FILE, ":%d", scale);                 \
        !          1589:          putc (')', FILE);                                             \
        !          1590:          break;                                                        \
        !          1591:        }                                                               \
        !          1592:       else if (reg1 != 0 && GET_CODE (addr) == LABEL_REF)              \
        !          1593:        { fprintf (FILE, "pc@(L%d-LI%d-2:b,%s:l)",                      \
        !          1594:                   CODE_LABEL_NUMBER (XEXP (addr, 0)),                  \
        !          1595:                   CODE_LABEL_NUMBER (XEXP (addr, 0)),                  \
        !          1596:                   reg_names[REGNO (reg1)]);                            \
        !          1597:          break; }                                                      \
        !          1598:     default:                                                           \
        !          1599:       if (GET_CODE (addr) == CONST_INT                                 \
        !          1600:          && INTVAL (addr) < 0x8000                                     \
        !          1601:          && INTVAL (addr) >= -0x8000)                                  \
        !          1602:        fprintf (FILE, "%d:w", INTVAL (addr));                          \
        !          1603:       else                                                             \
        !          1604:         output_addr_const (FILE, addr);                                        \
        !          1605:     }}
        !          1606: 
        !          1607: /*
        !          1608: Local variables:
        !          1609: version-control: t
        !          1610: End:
        !          1611: */

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