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Annotation of gcc/config/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 2, 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.h 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 sun3.h, sun2.h, isi.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: /* Define SUPPORT_SUN_FPA to include support for generating code for
        !            37:    the Sun Floating Point Accelerator, an optional product for Sun 3
        !            38:    machines.  By default, it is not defined.  Avoid defining it unless
        !            39:    you need to output code for the Sun3+FPA architecture, as it has the
        !            40:    effect of slowing down the register set operations in hard-reg-set.h
        !            41:    (total number of registers will exceed number of bits in a long,
        !            42:    if defined, causing the set operations to expand to loops).
        !            43:    SUPPORT_SUN_FPA is typically defined in sun3.h.  */
        !            44: 
        !            45: /* Run-time compilation parameters selecting different hardware subsets.  */
        !            46: 
        !            47: extern int target_flags;
        !            48: 
        !            49: /* Macros used in the machine description to test the flags.  */
        !            50: 
        !            51: /* Compile for a 68020 (not a 68000 or 68010).  */
        !            52: #define TARGET_68020 (target_flags & 1)
        !            53: 
        !            54: /* Compile 68881 insns for floating point (not library calls).  */
        !            55: #define TARGET_68881 (target_flags & 2)
        !            56: 
        !            57: /* Compile using 68020 bitfield insns.  */
        !            58: #define TARGET_BITFIELD (target_flags & 4)
        !            59: 
        !            60: /* Compile using rtd insn calling sequence.
        !            61:    This will not work unless you use prototypes at least
        !            62:    for all functions that can take varying numbers of args.  */
        !            63: #define TARGET_RTD (target_flags & 8)
        !            64: 
        !            65: /* Compile passing first two args in regs 0 and 1.
        !            66:    This exists only to test compiler features that will
        !            67:    be needed for RISC chips.  It is not usable
        !            68:    and is not intended to be usable on this cpu.  */
        !            69: #define TARGET_REGPARM (target_flags & 020)
        !            70: 
        !            71: /* Compile with 16-bit `int'.  */
        !            72: #define TARGET_SHORT (target_flags & 040)
        !            73: 
        !            74: /* Compile with special insns for Sun FPA.  */
        !            75: #ifdef SUPPORT_SUN_FPA
        !            76: #define TARGET_FPA (target_flags & 0100)
        !            77: #else
        !            78: #define TARGET_FPA 0
        !            79: #endif
        !            80: 
        !            81: /* Compile (actually, link) for Sun SKY board.  */
        !            82: #define TARGET_SKY (target_flags & 0200)
        !            83: 
        !            84: /* Optimize for 68040.
        !            85:    The 68040 will execute all 68030 and 68881/2 instrcutions, but some
        !            86:    of them must be emulated in software by the OS.  When TARGET_68040 is
        !            87:    turned on, these instructions won't be used.  This code will still
        !            88:    run on a 68030 and 68881/2. */
        !            89: #define TARGET_68040 (target_flags & 0400)
        !            90: 
        !            91: /* Support 68040 fp instructions.  */
        !            92: #define TARGET_68040_ONLY (target_flags & 01000)
        !            93: 
        !            94: /* Macro to define tables used to set the flags.
        !            95:    This is a list in braces of pairs in braces,
        !            96:    each pair being { "NAME", VALUE }
        !            97:    where VALUE is the bits to set or minus the bits to clear.
        !            98:    An empty string NAME is used to identify the default VALUE.  */
        !            99: 
        !           100: #define TARGET_SWITCHES  \
        !           101:   { { "68020", 5},                             \
        !           102:     { "c68020", 5},                            \
        !           103:     { "68881", 2},                             \
        !           104:     { "bitfield", 4},                          \
        !           105:     { "68000", -5},                            \
        !           106:     { "c68000", -5},                           \
        !           107:     { "soft-float", -0102},                    \
        !           108:     { "nobitfield", -4},                       \
        !           109:     { "rtd", 8},                               \
        !           110:     { "nortd", -8},                            \
        !           111:     { "short", 040},                           \
        !           112:     { "noshort", -040},                                \
        !           113:     { "fpa", 0100},                            \
        !           114:     { "nofpa", -0100},                         \
        !           115:     { "sky", 0200},                            \
        !           116:     { "nosky", -0200},                         \
        !           117:     { "68040", 0407},                          \
        !           118:     { "68030", -01400},                                \
        !           119:     { "68030", 7},                             \
        !           120:     { "68040-only", 01000},                    \
        !           121:     { "", TARGET_DEFAULT}}
        !           122: /* TARGET_DEFAULT is defined in sun*.h and isi.h, etc.  */
        !           123: 
        !           124: #ifdef SUPPORT_SUN_FPA
        !           125: /* Blow away 68881 flag silently on TARGET_FPA (since we can't clear
        !           126:    any bits in TARGET_SWITCHES above) */
        !           127: #define OVERRIDE_OPTIONS               \
        !           128: {                                      \
        !           129:   if (TARGET_FPA) target_flags &= ~2;  \
        !           130:   if (! TARGET_68020 && flag_pic == 2) \
        !           131:     error("-fPIC is not currently supported on the 68000 or 68010\n"); \
        !           132: }
        !           133: #else
        !           134: #define OVERRIDE_OPTIONS               \
        !           135: {                                      \
        !           136:   if (! TARGET_68020 && flag_pic == 2) \
        !           137:     error("-fPIC is not currently supported on the 68000 or 68010\n"); \
        !           138: }
        !           139: #endif /* defined SUPPORT_SUN_FPA */
        !           140: 
        !           141: /* target machine storage layout */
        !           142: 
        !           143: /* Define this if most significant bit is lowest numbered
        !           144:    in instructions that operate on numbered bit-fields.
        !           145:    This is true for 68020 insns such as bfins and bfexts.
        !           146:    We make it true always by avoiding using the single-bit insns
        !           147:    except in special cases with constant bit numbers.  */
        !           148: #define BITS_BIG_ENDIAN 1
        !           149: 
        !           150: /* Define this if most significant byte of a word is the lowest numbered.  */
        !           151: /* That is true on the 68000.  */
        !           152: #define BYTES_BIG_ENDIAN 1
        !           153: 
        !           154: /* Define this if most significant word of a multiword number is the lowest
        !           155:    numbered.  */
        !           156: /* For 68000 we can decide arbitrarily
        !           157:    since there are no machine instructions for them.
        !           158:    So let's be consistent.  */
        !           159: #define WORDS_BIG_ENDIAN 1
        !           160: 
        !           161: /* number of bits in an addressible storage unit */
        !           162: #define BITS_PER_UNIT 8
        !           163: 
        !           164: /* Width in bits of a "word", which is the contents of a machine register.
        !           165:    Note that this is not necessarily the width of data type `int';
        !           166:    if using 16-bit ints on a 68000, this would still be 32.
        !           167:    But on a machine with 16-bit registers, this would be 16.  */
        !           168: #define BITS_PER_WORD 32
        !           169: 
        !           170: /* Width of a word, in units (bytes).  */
        !           171: #define UNITS_PER_WORD 4
        !           172: 
        !           173: /* Width in bits of a pointer.
        !           174:    See also the macro `Pmode' defined below.  */
        !           175: #define POINTER_SIZE 32
        !           176: 
        !           177: /* Allocation boundary (in *bits*) for storing arguments in argument list.  */
        !           178: #define PARM_BOUNDARY (TARGET_SHORT ? 16 : 32)
        !           179: 
        !           180: /* Boundary (in *bits*) on which stack pointer should be aligned.  */
        !           181: #define STACK_BOUNDARY 16
        !           182: 
        !           183: /* Allocation boundary (in *bits*) for the code of a function.  */
        !           184: #define FUNCTION_BOUNDARY 16
        !           185: 
        !           186: /* Alignment of field after `int : 0' in a structure.  */
        !           187: #define EMPTY_FIELD_BOUNDARY 16
        !           188: 
        !           189: /* No data type wants to be aligned rounder than this.  */
        !           190: #define BIGGEST_ALIGNMENT 16
        !           191: 
        !           192: /* Define this if move instructions will actually fail to work
        !           193:    when given unaligned data.  */
        !           194: #define STRICT_ALIGNMENT
        !           195: 
        !           196: #define SELECT_RTX_SECTION(MODE, X)                                    \
        !           197: {                                                                      \
        !           198:   if (!flag_pic)                                                       \
        !           199:     readonly_data_section();                                           \
        !           200:   else if (LEGITIMATE_PIC_OPERAND_P (X))                               \
        !           201:     readonly_data_section();                                           \
        !           202:   else                                                                 \
        !           203:     data_section();                                                    \
        !           204: }
        !           205: 
        !           206: /* Define number of bits in most basic integer type.
        !           207:    (If undefined, default is BITS_PER_WORD).  */
        !           208: 
        !           209: #define INT_TYPE_SIZE (TARGET_SHORT ? 16 : 32)
        !           210: 
        !           211: /* Define these to avoid dependence on meaning of `int'.
        !           212:    Note that WCHAR_TYPE_SIZE is used in cexp.y,
        !           213:    where TARGET_SHORT is not available.  */
        !           214: 
        !           215: #define WCHAR_TYPE "long int"
        !           216: #define WCHAR_TYPE_SIZE 32
        !           217: 
        !           218: /* Standard register usage.  */
        !           219: 
        !           220: /* Number of actual hardware registers.
        !           221:    The hardware registers are assigned numbers for the compiler
        !           222:    from 0 to just below FIRST_PSEUDO_REGISTER.
        !           223:    All registers that the compiler knows about must be given numbers,
        !           224:    even those that are not normally considered general registers.
        !           225:    For the 68000, we give the data registers numbers 0-7,
        !           226:    the address registers numbers 010-017,
        !           227:    and the 68881 floating point registers numbers 020-027.  */
        !           228: #ifndef SUPPORT_SUN_FPA
        !           229: #define FIRST_PSEUDO_REGISTER 24
        !           230: #else
        !           231: #define FIRST_PSEUDO_REGISTER 56
        !           232: #endif
        !           233: 
        !           234: /* This defines the register which is used to hold the offset table for PIC. */
        !           235: #define PIC_OFFSET_TABLE_REGNUM 13
        !           236: 
        !           237: /* Used to output a (use pic_offset_table_rtx) so that we 
        !           238:    always save/restore a5 in functions that use PIC relocation
        !           239:    at *any* time during the compilation process. */
        !           240: #define FINALIZE_PIC finalize_pic()
        !           241: 
        !           242: #ifndef SUPPORT_SUN_FPA
        !           243: 
        !           244: /* 1 for registers that have pervasive standard uses
        !           245:    and are not available for the register allocator.
        !           246:    On the 68000, only the stack pointer is such.  */
        !           247: 
        !           248: #define FIXED_REGISTERS        \
        !           249:  {/* Data registers.  */       \
        !           250:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           251:                                \
        !           252:   /* Address registers.  */    \
        !           253:   0, 0, 0, 0, 0, 0, 0, 1,      \
        !           254:                                \
        !           255:   /* Floating point registers  \
        !           256:      (if available).  */       \
        !           257:   0, 0, 0, 0, 0, 0, 0, 0 }
        !           258: 
        !           259: /* 1 for registers not available across function calls.
        !           260:    These must include the FIXED_REGISTERS and also any
        !           261:    registers that can be used without being saved.
        !           262:    The latter must include the registers where values are returned
        !           263:    and the register where structure-value addresses are passed.
        !           264:    Aside from that, you can include as many other registers as you like.  */
        !           265: #define CALL_USED_REGISTERS \
        !           266:  {1, 1, 0, 0, 0, 0, 0, 0,   \
        !           267:   1, 1, 0, 0, 0, 0, 0, 1,   \
        !           268:   1, 1, 0, 0, 0, 0, 0, 0 }
        !           269: 
        !           270: #else /* SUPPORT_SUN_FPA */
        !           271: 
        !           272: /* 1 for registers that have pervasive standard uses
        !           273:    and are not available for the register allocator.
        !           274:    On the 68000, only the stack pointer is such.  */
        !           275: 
        !           276: /* fpa0 is also reserved so that it can be used to move shit back and
        !           277:    forth between high fpa regs and everything else. */
        !           278: 
        !           279: #define FIXED_REGISTERS        \
        !           280:  {/* Data registers.  */       \
        !           281:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           282:                                \
        !           283:   /* Address registers.  */    \
        !           284:   0, 0, 0, 0, 0, 0, 0, 1,      \
        !           285:                                \
        !           286:   /* Floating point registers  \
        !           287:      (if available).  */       \
        !           288:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           289:                                \
        !           290:   /* Sun3 FPA registers.  */   \
        !           291:   1, 0, 0, 0, 0, 0, 0, 0,      \
        !           292:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           293:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           294:   0, 0, 0, 0, 0, 0, 0, 0 }
        !           295: 
        !           296: /* 1 for registers not available across function calls.
        !           297:    These must include the FIXED_REGISTERS and also any
        !           298:    registers that can be used without being saved.
        !           299:    The latter must include the registers where values are returned
        !           300:    and the register where structure-value addresses are passed.
        !           301:    Aside from that, you can include as many other registers as you like.  */
        !           302: #define CALL_USED_REGISTERS \
        !           303:  {1, 1, 0, 0, 0, 0, 0, 0, \
        !           304:   1, 1, 0, 0, 0, 0, 0, 1, \
        !           305:   1, 1, 0, 0, 0, 0, 0, 0, \
        !           306:   /* FPA registers.  */   \
        !           307:   1, 1, 1, 1, 0, 0, 0, 0, \
        !           308:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           309:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           310:   0, 0, 0, 0, 0, 0, 0, 0  }
        !           311: 
        !           312: #endif /* defined SUPPORT_SUN_FPA */
        !           313: 
        !           314: 
        !           315: /* Make sure everything's fine if we *don't* have a given processor.
        !           316:    This assumes that putting a register in fixed_regs will keep the
        !           317:    compiler's mitts completely off it.  We don't bother to zero it out
        !           318:    of register classes.  If neither TARGET_FPA or TARGET_68881 is set,
        !           319:    the compiler won't touch since no instructions that use these
        !           320:    registers will be valid.  
        !           321: 
        !           322:    Reserve PIC_OFFSET_TABLE_REGNUM (a5) for doing PIC relocation if
        !           323:    position independent code is being generated by making it a 
        !           324:    fixed register */
        !           325: 
        !           326: #ifndef SUPPORT_SUN_FPA
        !           327: 
        !           328: #define CONDITIONAL_REGISTER_USAGE \
        !           329: {                                               \
        !           330:   if (flag_pic)                                 \
        !           331:     fixed_regs[PIC_OFFSET_TABLE_REGNUM] = 1;    \
        !           332: }
        !           333: 
        !           334: #else /* defined SUPPORT_SUN_FPA */
        !           335: 
        !           336: #define CONDITIONAL_REGISTER_USAGE \
        !           337: {                                              \
        !           338:   int i;                                       \
        !           339:   HARD_REG_SET x;                              \
        !           340:   if (!TARGET_FPA)                             \
        !           341:     {                                          \
        !           342:       COPY_HARD_REG_SET (x, reg_class_contents[(int)FPA_REGS]); \
        !           343:       for (i = 0; i < FIRST_PSEUDO_REGISTER; i++ ) \
        !           344:        if (TEST_HARD_REG_BIT (x, i))           \
        !           345:        fixed_regs[i] = call_used_regs[i] = 1;  \
        !           346:     }                                          \
        !           347:   if (TARGET_FPA)                              \
        !           348:     {                                          \
        !           349:       COPY_HARD_REG_SET (x, reg_class_contents[(int)FP_REGS]); \
        !           350:       for (i = 0; i < FIRST_PSEUDO_REGISTER; i++ ) \
        !           351:        if (TEST_HARD_REG_BIT (x, i))           \
        !           352:        fixed_regs[i] = call_used_regs[i] = 1;  \
        !           353:     }                                          \
        !           354:   if (flag_pic)                                 \
        !           355:     fixed_regs[PIC_OFFSET_TABLE_REGNUM] = 1;    \
        !           356: }
        !           357: 
        !           358: #endif /* defined SUPPORT_SUN_FPA */
        !           359: 
        !           360: /* Return number of consecutive hard regs needed starting at reg REGNO
        !           361:    to hold something of mode MODE.
        !           362:    This is ordinarily the length in words of a value of mode MODE
        !           363:    but can be less for certain modes in special long registers.
        !           364: 
        !           365:    On the 68000, ordinary registers hold 32 bits worth;
        !           366:    for the 68881 registers, a single register is always enough for
        !           367:    anything that can be stored in them at all.  */
        !           368: #define HARD_REGNO_NREGS(REGNO, MODE)   \
        !           369:   ((REGNO) >= 16 ? GET_MODE_NUNITS (MODE)      \
        !           370:    : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
        !           371: 
        !           372: #ifndef SUPPORT_SUN_FPA
        !           373: 
        !           374: /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
        !           375:    On the 68000, the cpu registers can hold any mode but the 68881 registers
        !           376:    can hold only SFmode or DFmode.  The 68881 registers can't hold anything
        !           377:    if 68881 use is disabled.  */
        !           378: 
        !           379: #define HARD_REGNO_MODE_OK(REGNO, MODE) \
        !           380:   (((REGNO) < 16)                                       \
        !           381:    || ((REGNO) < 24                                    \
        !           382:        && TARGET_68881                                  \
        !           383:        && (GET_MODE_CLASS (MODE) == MODE_FLOAT         \
        !           384:           || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT)))
        !           385: 
        !           386: #else /* defined SUPPORT_SUN_FPA */
        !           387: 
        !           388: /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
        !           389:    On the 68000, the cpu registers can hold any mode but the 68881 registers
        !           390:    can hold only SFmode or DFmode.  And the 68881 registers can't hold anything
        !           391:    if 68881 use is disabled.  However, the Sun FPA register can
        !           392:    (apparently) hold whatever you feel like putting in them.
        !           393:    If using the fpa, don't put a double in d7/a0.  */
        !           394: 
        !           395: #define HARD_REGNO_MODE_OK(REGNO, MODE) \
        !           396: (((REGNO) < 16                                                         \
        !           397:   && !(TARGET_FPA                                                      \
        !           398:        && GET_MODE_CLASS ((MODE)) != MODE_INT                          \
        !           399:        && GET_MODE_UNIT_SIZE ((MODE)) > 4                              \
        !           400:        && (REGNO) < 8 && (REGNO) + GET_MODE_SIZE ((MODE)) / 4 > 8      \
        !           401:        && (REGNO) % (GET_MODE_UNIT_SIZE ((MODE)) / 4) != 0))           \
        !           402:  || ((REGNO) < 24                                                      \
        !           403:      ? TARGET_68881 && (GET_MODE_CLASS (MODE) == MODE_FLOAT            \
        !           404:                        || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) \
        !           405:      : ((REGNO) < 56 ? TARGET_FPA : 0)))
        !           406: 
        !           407: #endif /* defined SUPPORT_SUN_FPA */
        !           408: 
        !           409: /* Value is 1 if it is a good idea to tie two pseudo registers
        !           410:    when one has mode MODE1 and one has mode MODE2.
        !           411:    If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
        !           412:    for any hard reg, then this must be 0 for correct output.  */
        !           413: #define MODES_TIEABLE_P(MODE1, MODE2)                  \
        !           414:   (! TARGET_68881                                      \
        !           415:    || ((GET_MODE_CLASS (MODE1) == MODE_FLOAT           \
        !           416:        || GET_MODE_CLASS (MODE1) == MODE_COMPLEX_FLOAT)        \
        !           417:        == (GET_MODE_CLASS (MODE2) == MODE_FLOAT                \
        !           418:           || GET_MODE_CLASS (MODE2) == MODE_COMPLEX_FLOAT)))
        !           419: 
        !           420: /* Specify the registers used for certain standard purposes.
        !           421:    The values of these macros are register numbers.  */
        !           422: 
        !           423: /* m68000 pc isn't overloaded on a register.  */
        !           424: /* #define PC_REGNUM  */
        !           425: 
        !           426: /* Register to use for pushing function arguments.  */
        !           427: #define STACK_POINTER_REGNUM 15
        !           428: 
        !           429: /* Base register for access to local variables of the function.  */
        !           430: #define FRAME_POINTER_REGNUM 14
        !           431: 
        !           432: /* Value should be nonzero if functions must have frame pointers.
        !           433:    Zero means the frame pointer need not be set up (and parms
        !           434:    may be accessed via the stack pointer) in functions that seem suitable.
        !           435:    This is computed in `reload', in reload1.c.  */
        !           436: #define FRAME_POINTER_REQUIRED 0
        !           437: 
        !           438: /* Base register for access to arguments of the function.  */
        !           439: #define ARG_POINTER_REGNUM 14
        !           440: 
        !           441: /* Register in which static-chain is passed to a function.  */
        !           442: #define STATIC_CHAIN_REGNUM 8
        !           443: 
        !           444: /* Register in which address to store a structure value
        !           445:    is passed to a function.  */
        !           446: #define STRUCT_VALUE_REGNUM 9
        !           447: 
        !           448: /* Define the classes of registers for register constraints in the
        !           449:    machine description.  Also define ranges of constants.
        !           450: 
        !           451:    One of the classes must always be named ALL_REGS and include all hard regs.
        !           452:    If there is more than one class, another class must be named NO_REGS
        !           453:    and contain no registers.
        !           454: 
        !           455:    The name GENERAL_REGS must be the name of a class (or an alias for
        !           456:    another name such as ALL_REGS).  This is the class of registers
        !           457:    that is allowed by "g" or "r" in a register constraint.
        !           458:    Also, registers outside this class are allocated only when
        !           459:    instructions express preferences for them.
        !           460: 
        !           461:    The classes must be numbered in nondecreasing order; that is,
        !           462:    a larger-numbered class must never be contained completely
        !           463:    in a smaller-numbered class.
        !           464: 
        !           465:    For any two classes, it is very desirable that there be another
        !           466:    class that represents their union.  */
        !           467: 
        !           468: /* The 68000 has three kinds of registers, so eight classes would be
        !           469:    a complete set.  One of them is not needed.  */
        !           470: 
        !           471: #ifndef SUPPORT_SUN_FPA
        !           472: 
        !           473: enum reg_class {
        !           474:   NO_REGS, DATA_REGS,
        !           475:   ADDR_REGS, FP_REGS,
        !           476:   GENERAL_REGS, DATA_OR_FP_REGS,
        !           477:   ADDR_OR_FP_REGS, ALL_REGS,
        !           478:   LIM_REG_CLASSES };
        !           479: 
        !           480: #define N_REG_CLASSES (int) LIM_REG_CLASSES
        !           481: 
        !           482: /* Give names of register classes as strings for dump file.   */
        !           483: 
        !           484: #define REG_CLASS_NAMES \
        !           485:  { "NO_REGS", "DATA_REGS",              \
        !           486:    "ADDR_REGS", "FP_REGS",              \
        !           487:    "GENERAL_REGS", "DATA_OR_FP_REGS",   \
        !           488:    "ADDR_OR_FP_REGS", "ALL_REGS" }
        !           489: 
        !           490: /* Define which registers fit in which classes.
        !           491:    This is an initializer for a vector of HARD_REG_SET
        !           492:    of length N_REG_CLASSES.  */
        !           493: 
        !           494: #define REG_CLASS_CONTENTS \
        !           495: {                                      \
        !           496:  0x00000000,           /* NO_REGS */           \
        !           497:  0x000000ff,   /* DATA_REGS */         \
        !           498:  0x0000ff00,   /* ADDR_REGS */         \
        !           499:  0x00ff0000,   /* FP_REGS */           \
        !           500:  0x0000ffff,   /* GENERAL_REGS */      \
        !           501:  0x00ff00ff,   /* DATA_OR_FP_REGS */   \
        !           502:  0x00ffff00,    /* ADDR_OR_FP_REGS */   \
        !           503:  0x00ffffff,   /* ALL_REGS */          \
        !           504: }
        !           505: 
        !           506: /* The same information, inverted:
        !           507:    Return the class number of the smallest class containing
        !           508:    reg number REGNO.  This could be a conditional expression
        !           509:    or could index an array.  */
        !           510: 
        !           511: #define REGNO_REG_CLASS(REGNO) (((REGNO)>>3)+1)
        !           512: 
        !           513: #else /* defined SUPPORT_SUN_FPA */
        !           514: 
        !           515: /*
        !           516:  * Notes on final choices:
        !           517:  *
        !           518:  *   1) Didn't feel any need to union-ize LOW_FPA_REGS with anything
        !           519:  * else.
        !           520:  *   2) Removed all unions that involve address registers with
        !           521:  * floating point registers (left in unions of address and data with
        !           522:  * floating point).
        !           523:  *   3) Defined GENERAL_REGS as ADDR_OR_DATA_REGS.
        !           524:  *   4) Defined ALL_REGS as FPA_OR_FP_OR_GENERAL_REGS.
        !           525:  *   4) Left in everything else.
        !           526:  */
        !           527: enum reg_class { NO_REGS, LO_FPA_REGS, FPA_REGS, FP_REGS,
        !           528:   FP_OR_FPA_REGS, DATA_REGS, DATA_OR_FPA_REGS, DATA_OR_FP_REGS,
        !           529:   DATA_OR_FP_OR_FPA_REGS, ADDR_REGS, GENERAL_REGS,
        !           530:   GENERAL_OR_FPA_REGS, GENERAL_OR_FP_REGS, ALL_REGS,
        !           531:   LIM_REG_CLASSES };
        !           532: 
        !           533: #define N_REG_CLASSES (int) LIM_REG_CLASSES
        !           534: 
        !           535: /* Give names of register classes as strings for dump file.   */
        !           536: 
        !           537: #define REG_CLASS_NAMES \
        !           538:  { "NO_REGS", "LO_FPA_REGS", "FPA_REGS", "FP_REGS",  \
        !           539:    "FP_OR_FPA_REGS", "DATA_REGS", "DATA_OR_FPA_REGS", "DATA_OR_FP_REGS",  \
        !           540:    "DATA_OR_FP_OR_FPA_REGS", "ADDR_REGS", "GENERAL_REGS",  \
        !           541:    "GENERAL_OR_FPA_REGS", "GENERAL_OR_FP_REGS", "ALL_REGS" }
        !           542: 
        !           543: /* Define which registers fit in which classes.
        !           544:    This is an initializer for a vector of HARD_REG_SET
        !           545:    of length N_REG_CLASSES.  */
        !           546: 
        !           547: #define REG_CLASS_CONTENTS \
        !           548: {                                                      \
        !           549:  {0, 0},                       /* NO_REGS */           \
        !           550:  {0xff000000, 0x000000ff},     /* LO_FPA_REGS */       \
        !           551:  {0xff000000, 0x00ffffff},     /* FPA_REGS */          \
        !           552:  {0x00ff0000, 0x00000000},     /* FP_REGS */           \
        !           553:  {0xffff0000, 0x00ffffff},     /* FP_OR_FPA_REGS */    \
        !           554:  {0x000000ff, 0x00000000},     /* DATA_REGS */         \
        !           555:  {0xff0000ff, 0x00ffffff},     /* DATA_OR_FPA_REGS */  \
        !           556:  {0x00ff00ff, 0x00000000},     /* DATA_OR_FP_REGS */   \
        !           557:  {0xffff00ff, 0x00ffffff},     /* DATA_OR_FP_OR_FPA_REGS */\
        !           558:  {0x0000ff00, 0x00000000},     /* ADDR_REGS */         \
        !           559:  {0x0000ffff, 0x00000000},     /* GENERAL_REGS */      \
        !           560:  {0xff00ffff, 0x00ffffff},     /* GENERAL_OR_FPA_REGS */\
        !           561:  {0x00ffffff, 0x00000000},     /* GENERAL_OR_FP_REGS */\
        !           562:  {0xffffffff, 0x00ffffff},     /* ALL_REGS */          \
        !           563: }
        !           564: 
        !           565: /* The same information, inverted:
        !           566:    Return the class number of the smallest class containing
        !           567:    reg number REGNO.  This could be a conditional expression
        !           568:    or could index an array.  */
        !           569: 
        !           570: extern enum reg_class regno_reg_class[];
        !           571: #define REGNO_REG_CLASS(REGNO) (regno_reg_class[(REGNO)>>3])
        !           572: 
        !           573: #endif /* SUPPORT_SUN_FPA */
        !           574: 
        !           575: /* The class value for index registers, and the one for base regs.  */
        !           576: 
        !           577: #define INDEX_REG_CLASS GENERAL_REGS
        !           578: #define BASE_REG_CLASS ADDR_REGS
        !           579: 
        !           580: /* Get reg_class from a letter such as appears in the machine description.
        !           581:    We do a trick here to modify the effective constraints on the
        !           582:    machine description; we zorch the constraint letters that aren't
        !           583:    appropriate for a specific target.  This allows us to guarantee
        !           584:    that a specific kind of register will not be used for a given target
        !           585:    without fiddling with the register classes above. */
        !           586: 
        !           587: #ifndef SUPPORT_SUN_FPA
        !           588: 
        !           589: #define REG_CLASS_FROM_LETTER(C) \
        !           590:   ((C) == 'a' ? ADDR_REGS :                    \
        !           591:    ((C) == 'd' ? DATA_REGS :                   \
        !           592:     ((C) == 'f' ? (TARGET_68881 ? FP_REGS :    \
        !           593:                   NO_REGS) :                   \
        !           594:      NO_REGS)))
        !           595: 
        !           596: #else /* defined SUPPORT_SUN_FPA */
        !           597: 
        !           598: #define REG_CLASS_FROM_LETTER(C) \
        !           599:   ((C) == 'a' ? ADDR_REGS :                    \
        !           600:    ((C) == 'd' ? DATA_REGS :                   \
        !           601:     ((C) == 'f' ? (TARGET_68881 ? FP_REGS :    \
        !           602:                   NO_REGS) :                   \
        !           603:      ((C) == 'x' ? (TARGET_FPA ? FPA_REGS :    \
        !           604:                    NO_REGS) :                  \
        !           605:       ((C) == 'y' ? (TARGET_FPA ? LO_FPA_REGS :        \
        !           606:                     NO_REGS) :                 \
        !           607:        NO_REGS)))))
        !           608: 
        !           609: #endif /* defined SUPPORT_SUN_FPA */
        !           610: 
        !           611: /* The letters I, J, K, L and M in a register constraint string
        !           612:    can be used to stand for particular ranges of immediate operands.
        !           613:    This macro defines what the ranges are.
        !           614:    C is the letter, and VALUE is a constant value.
        !           615:    Return 1 if VALUE is in the range specified by C.
        !           616: 
        !           617:    For the 68000, `I' is used for the range 1 to 8
        !           618:    allowed as immediate shift counts and in addq.
        !           619:    `J' is used for the range of signed numbers that fit in 16 bits.
        !           620:    `K' is for numbers that moveq can't handle.
        !           621:    `L' is for range -8 to -1, range of values that can be added with subq.  */
        !           622: 
        !           623: #define CONST_OK_FOR_LETTER_P(VALUE, C)  \
        !           624:   ((C) == 'I' ? (VALUE) > 0 && (VALUE) <= 8 :    \
        !           625:    (C) == 'J' ? (VALUE) >= -0x8000 && (VALUE) <= 0x7FFF :      \
        !           626:    (C) == 'K' ? (VALUE) < -0x80 || (VALUE) >= 0x80 :   \
        !           627:    (C) == 'L' ? (VALUE) < 0 && (VALUE) >= -8 : 0)
        !           628: 
        !           629: /*
        !           630:  * A small bit of explanation:
        !           631:  * "G" defines all of the floating constants that are *NOT* 68881
        !           632:  * constants.  this is so 68881 constants get reloaded and the
        !           633:  * fpmovecr is used.  "H" defines *only* the class of constants that
        !           634:  * the fpa can use, because these can be gotten at in any fpa
        !           635:  * instruction and there is no need to force reloads.
        !           636:  */
        !           637: #ifndef SUPPORT_SUN_FPA
        !           638: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)  \
        !           639:   ((C) == 'G' ? ! (TARGET_68881 && standard_68881_constant_p (VALUE)) : 0 )
        !           640: #else /* defined SUPPORT_SUN_FPA */
        !           641: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)  \
        !           642:   ((C) == 'G' ? ! (TARGET_68881 && standard_68881_constant_p (VALUE)) : \
        !           643:    (C) == 'H' ? (TARGET_FPA && standard_sun_fpa_constant_p (VALUE)) : 0)
        !           644: #endif /* defined SUPPORT_SUN_FPA */
        !           645: 
        !           646: /* Given an rtx X being reloaded into a reg required to be
        !           647:    in class CLASS, return the class of reg to actually use.
        !           648:    In general this is just CLASS; but on some machines
        !           649:    in some cases it is preferable to use a more restrictive class.
        !           650:    On the 68000 series, use a data reg if possible when the
        !           651:    value is a constant in the range where moveq could be used
        !           652:    and we ensure that QImodes are reloaded into data regs.
        !           653:    Also, if a floating constant needs reloading, put it in memory
        !           654:    if possible.  */
        !           655: 
        !           656: #define PREFERRED_RELOAD_CLASS(X,CLASS)  \
        !           657:   ((GET_CODE (X) == CONST_INT                  \
        !           658:     && (unsigned) (INTVAL (X) + 0x80) < 0x100  \
        !           659:     && (CLASS) != ADDR_REGS)                   \
        !           660:    ? DATA_REGS                                 \
        !           661:    : (GET_MODE (X) == QImode && (CLASS) != ADDR_REGS) \
        !           662:    ? DATA_REGS                                 \
        !           663:    : (GET_CODE (X) == CONST_DOUBLE             \
        !           664:       && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT) \
        !           665:    ? NO_REGS                                   \
        !           666:    : (CLASS))
        !           667: 
        !           668: /* Return the maximum number of consecutive registers
        !           669:    needed to represent mode MODE in a register of class CLASS.  */
        !           670: /* On the 68000, this is the size of MODE in words,
        !           671:    except in the FP regs, where a single reg is always enough.  */
        !           672: #ifndef SUPPORT_SUN_FPA
        !           673: 
        !           674: #define CLASS_MAX_NREGS(CLASS, MODE)   \
        !           675:  ((CLASS) == FP_REGS ? 1 \
        !           676:   : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
        !           677: 
        !           678: /* Moves between fp regs and other regs are two insns.  */
        !           679: #define REGISTER_MOVE_COST(CLASS1, CLASS2)             \
        !           680:   (((CLASS1) == FP_REGS && (CLASS2) != FP_REGS)                \
        !           681:     || ((CLASS2) == FP_REGS && (CLASS1) != FP_REGS)    \
        !           682:     ? 4 : 2)
        !           683: 
        !           684: #else /* defined SUPPORT_SUN_FPA */
        !           685: 
        !           686: #define CLASS_MAX_NREGS(CLASS, MODE)   \
        !           687:  ((CLASS) == FP_REGS || (CLASS) == FPA_REGS || (CLASS) == LO_FPA_REGS ? 1 \
        !           688:   : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
        !           689: 
        !           690: /* Moves between fp regs and other regs are two insns.  */
        !           691: /* Likewise for high fpa regs and other regs.  */
        !           692: #define REGISTER_MOVE_COST(CLASS1, CLASS2)             \
        !           693:   ((((CLASS1) == FP_REGS && (CLASS2) != FP_REGS)       \
        !           694:     || ((CLASS2) == FP_REGS && (CLASS1) != FP_REGS)    \
        !           695:     || ((CLASS1) == FPA_REGS && (CLASS2) != FPA_REGS)  \
        !           696:     || ((CLASS2) == FPA_REGS && (CLASS1) != FPA_REGS)) \
        !           697:    ? 4 : 2)
        !           698: 
        !           699: #endif /* define SUPPORT_SUN_FPA */
        !           700: 
        !           701: /* Stack layout; function entry, exit and calling.  */
        !           702: 
        !           703: /* Define this if pushing a word on the stack
        !           704:    makes the stack pointer a smaller address.  */
        !           705: #define STACK_GROWS_DOWNWARD
        !           706: 
        !           707: /* Nonzero if we need to generate stack-probe insns.
        !           708:    On most systems they are not needed.
        !           709:    When they are needed, define this as the stack offset to probe at.  */
        !           710: #define NEED_PROBE 0
        !           711: 
        !           712: /* Define this if the nominal address of the stack frame
        !           713:    is at the high-address end of the local variables;
        !           714:    that is, each additional local variable allocated
        !           715:    goes at a more negative offset in the frame.  */
        !           716: #define FRAME_GROWS_DOWNWARD
        !           717: 
        !           718: /* Offset within stack frame to start allocating local variables at.
        !           719:    If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
        !           720:    first local allocated.  Otherwise, it is the offset to the BEGINNING
        !           721:    of the first local allocated.  */
        !           722: #define STARTING_FRAME_OFFSET 0
        !           723: 
        !           724: /* If we generate an insn to push BYTES bytes,
        !           725:    this says how many the stack pointer really advances by.
        !           726:    On the 68000, sp@- in a byte insn really pushes a word.  */
        !           727: #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1)
        !           728: 
        !           729: /* Offset of first parameter from the argument pointer register value.  */
        !           730: #define FIRST_PARM_OFFSET(FNDECL) 8
        !           731: 
        !           732: /* Value is the number of byte of arguments automatically
        !           733:    popped when returning from a subroutine call.
        !           734:    FUNTYPE is the data type of the function (as a tree),
        !           735:    or for a library call it is an identifier node for the subroutine name.
        !           736:    SIZE is the number of bytes of arguments passed on the stack.
        !           737: 
        !           738:    On the 68000, the RTS insn cannot pop anything.
        !           739:    On the 68010, the RTD insn may be used to pop them if the number
        !           740:      of args is fixed, but if the number is variable then the caller
        !           741:      must pop them all.  RTD can't be used for library calls now
        !           742:      because the library is compiled with the Unix compiler.
        !           743:    Use of RTD is a selectable option, since it is incompatible with
        !           744:    standard Unix calling sequences.  If the option is not selected,
        !           745:    the caller must always pop the args.  */
        !           746: 
        !           747: #define RETURN_POPS_ARGS(FUNTYPE,SIZE)   \
        !           748:   ((TARGET_RTD && TREE_CODE (FUNTYPE) != IDENTIFIER_NODE       \
        !           749:     && (TYPE_ARG_TYPES (FUNTYPE) == 0                          \
        !           750:        || (TREE_VALUE (tree_last (TYPE_ARG_TYPES (FUNTYPE)))   \
        !           751:            == void_type_node)))                                \
        !           752:    ? (SIZE) : 0)
        !           753: 
        !           754: /* Define how to find the value returned by a function.
        !           755:    VALTYPE is the data type of the value (as a tree).
        !           756:    If the precise function being called is known, FUNC is its FUNCTION_DECL;
        !           757:    otherwise, FUNC is 0.  */
        !           758: 
        !           759: /* On the 68000 the return value is in D0 regardless.  */
        !           760: 
        !           761: #define FUNCTION_VALUE(VALTYPE, FUNC)  \
        !           762:   gen_rtx (REG, TYPE_MODE (VALTYPE), 0)
        !           763: 
        !           764: /* Define how to find the value returned by a library function
        !           765:    assuming the value has mode MODE.  */
        !           766: 
        !           767: /* On the 68000 the return value is in D0 regardless.  */
        !           768: 
        !           769: #define LIBCALL_VALUE(MODE)  gen_rtx (REG, MODE, 0)
        !           770: 
        !           771: /* 1 if N is a possible register number for a function value.
        !           772:    On the 68000, d0 is the only register thus used.  */
        !           773: 
        !           774: #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
        !           775: 
        !           776: /* Define this if PCC uses the nonreentrant convention for returning
        !           777:    structure and union values.  */
        !           778: 
        !           779: #define PCC_STATIC_STRUCT_RETURN
        !           780: 
        !           781: /* 1 if N is a possible register number for function argument passing.
        !           782:    On the 68000, no registers are used in this way.  */
        !           783: 
        !           784: #define FUNCTION_ARG_REGNO_P(N) 0
        !           785: 
        !           786: /* Define a data type for recording info about an argument list
        !           787:    during the scan of that argument list.  This data type should
        !           788:    hold all necessary information about the function itself
        !           789:    and about the args processed so far, enough to enable macros
        !           790:    such as FUNCTION_ARG to determine where the next arg should go.
        !           791: 
        !           792:    On the m68k, this is a single integer, which is a number of bytes
        !           793:    of arguments scanned so far.  */
        !           794: 
        !           795: #define CUMULATIVE_ARGS int
        !           796: 
        !           797: /* Initialize a variable CUM of type CUMULATIVE_ARGS
        !           798:    for a call to a function whose data type is FNTYPE.
        !           799:    For a library call, FNTYPE is 0.
        !           800: 
        !           801:    On the m68k, the offset starts at 0.  */
        !           802: 
        !           803: #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME)       \
        !           804:  ((CUM) = 0)
        !           805: 
        !           806: /* Update the data in CUM to advance over an argument
        !           807:    of mode MODE and data type TYPE.
        !           808:    (TYPE is null for libcalls where that information may not be available.)  */
        !           809: 
        !           810: #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)   \
        !           811:  ((CUM) += ((MODE) != BLKmode                  \
        !           812:            ? (GET_MODE_SIZE (MODE) + 3) & ~3   \
        !           813:            : (int_size_in_bytes (TYPE) + 3) & ~3))
        !           814: 
        !           815: /* Define where to put the arguments to a function.
        !           816:    Value is zero to push the argument on the stack,
        !           817:    or a hard register in which to store the argument.
        !           818: 
        !           819:    MODE is the argument's machine mode.
        !           820:    TYPE is the data type of the argument (as a tree).
        !           821:     This is null for libcalls where that information may
        !           822:     not be available.
        !           823:    CUM is a variable of type CUMULATIVE_ARGS which gives info about
        !           824:     the preceding args and about the function being called.
        !           825:    NAMED is nonzero if this argument is a named parameter
        !           826:     (otherwise it is an extra parameter matching an ellipsis).  */
        !           827: 
        !           828: /* On the 68000 all args are pushed, except if -mregparm is specified
        !           829:    then the first two words of arguments are passed in d0, d1.
        !           830:    *NOTE* -mregparm does not work.
        !           831:    It exists only to test register calling conventions.  */
        !           832: 
        !           833: #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
        !           834: ((TARGET_REGPARM && (CUM) < 8) ? gen_rtx (REG, (MODE), (CUM) / 4) : 0)
        !           835: 
        !           836: /* For an arg passed partly in registers and partly in memory,
        !           837:    this is the number of registers used.
        !           838:    For args passed entirely in registers or entirely in memory, zero.  */
        !           839: 
        !           840: #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
        !           841: ((TARGET_REGPARM && (CUM) < 8                                  \
        !           842:   && 8 < ((CUM) + ((MODE) == BLKmode                           \
        !           843:                      ? int_size_in_bytes (TYPE)                \
        !           844:                      : GET_MODE_SIZE (MODE))))                 \
        !           845:  ? 2 - (CUM) / 4 : 0)
        !           846: 
        !           847: /* Generate the assembly code for function entry. */
        !           848: #define FUNCTION_PROLOGUE(FILE, SIZE) output_function_prologue(FILE, SIZE)
        !           849: 
        !           850: /* Output assembler code to FILE to increment profiler label # LABELNO
        !           851:    for profiling a function entry.  */
        !           852: 
        !           853: #define FUNCTION_PROFILER(FILE, LABELNO)  \
        !           854:   asm_fprintf (FILE, "\tlea %LLP%d,%Ra0\n\tjsr mcount\n", (LABELNO))
        !           855: 
        !           856: /* Output assembler code to FILE to initialize this source file's
        !           857:    basic block profiling info, if that has not already been done.  */
        !           858: 
        !           859: #define FUNCTION_BLOCK_PROFILER(FILE, LABELNO)  \
        !           860:   asm_fprintf (FILE, "\ttstl %LLPBX0\n\tbne %LLPI%d\n\tpea %LLPBX0\n\tjsr %U__bb_init_func\n\taddql %I4,%Rsp\n%LLPI%d:\n",  \
        !           861:           LABELNO, LABELNO);
        !           862: 
        !           863: /* Output assembler code to FILE to increment the entry-count for
        !           864:    the BLOCKNO'th basic block in this source file.  */
        !           865: 
        !           866: #define BLOCK_PROFILER(FILE, BLOCKNO)  \
        !           867:   asm_fprintf (FILE, "\taddql %I1,%LLPBX2+%d\n", 4 * BLOCKNO)
        !           868: 
        !           869: /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
        !           870:    the stack pointer does not matter.  The value is tested only in
        !           871:    functions that have frame pointers.
        !           872:    No definition is equivalent to always zero.  */
        !           873: 
        !           874: #define EXIT_IGNORE_STACK 1
        !           875: 
        !           876: /* Generate the assembly code for function exit. */
        !           877: #define FUNCTION_EPILOGUE(FILE, SIZE) output_function_epilogue (FILE, SIZE)
        !           878:   
        !           879: /* This is a hook for other tm files to change.  */
        !           880: /* #define FUNCTION_EXTRA_EPILOGUE(FILE, SIZE) */
        !           881: 
        !           882: /* Determine if the epilogue should be output as RTL.
        !           883:    You should override this if you define FUNCTION_EXTRA_EPILOGUE.  */
        !           884: #define USE_RETURN_INSN use_return_insn ()
        !           885: 
        !           886: /* Store in the variable DEPTH the initial difference between the
        !           887:    frame pointer reg contents and the stack pointer reg contents,
        !           888:    as of the start of the function body.  This depends on the layout
        !           889:    of the fixed parts of the stack frame and on how registers are saved.
        !           890: 
        !           891:    On the 68k, if we have a frame, we must add one word to its length
        !           892:    to allow for the place that a6 is stored when we do have a frame pointer.
        !           893:    Otherwise, we would need to compute the offset from the frame pointer
        !           894:    of a local variable as a function of frame_pointer_needed, which
        !           895:    is hard.  */
        !           896: 
        !           897: #define INITIAL_FRAME_POINTER_OFFSET(DEPTH)                    \
        !           898: { int regno;                                                   \
        !           899:   int offset = -4;                                             \
        !           900:   for (regno = 16; regno < FIRST_PSEUDO_REGISTER; regno++)     \
        !           901:     if (regs_ever_live[regno] && ! call_used_regs[regno])      \
        !           902:       offset += 12;                                            \
        !           903:   for (regno = 0; regno < 16; regno++)                         \
        !           904:     if (regs_ever_live[regno] && ! call_used_regs[regno])      \
        !           905:       offset += 4;                                             \
        !           906:   (DEPTH) = (offset + ((get_frame_size () + 3) & -4)           \
        !           907:             + (get_frame_size () == 0 ? 0 : 4));               \
        !           908: }
        !           909: 
        !           910: /* Output assembler code for a block containing the constant parts
        !           911:    of a trampoline, leaving space for the variable parts.  */
        !           912: 
        !           913: /* On the 68k, the trampoline looks like this:
        !           914:      mov  @#.,a0
        !           915:      jsr  @#__trampoline
        !           916:      jsr  @#__trampoline
        !           917:      .long STATIC
        !           918:      .long FUNCTION
        !           919: The reason for having three jsr insns is so that an entire line
        !           920: of the instruction cache is filled in a predictable way
        !           921: that will always be the same.  */
        !           922: 
        !           923: #define TRAMPOLINE_TEMPLATE(FILE)                                      \
        !           924: {                                                                      \
        !           925:   ASM_OUTPUT_SHORT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x207c));      \
        !           926:   ASM_OUTPUT_SHORT (FILE, const0_rtx);                                 \
        !           927:   ASM_OUTPUT_SHORT (FILE, const0_rtx);                                 \
        !           928:   ASM_OUTPUT_SHORT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x4ef9));      \
        !           929:   ASM_OUTPUT_INT (FILE, gen_rtx (SYMBOL_REF, SImode, "__trampoline")); \
        !           930:   ASM_OUTPUT_SHORT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x4ef9));      \
        !           931:   ASM_OUTPUT_INT (FILE, gen_rtx (SYMBOL_REF, SImode, "__trampoline")); \
        !           932:   ASM_OUTPUT_SHORT (FILE, const0_rtx);                                 \
        !           933:   ASM_OUTPUT_SHORT (FILE, const0_rtx);                                 \
        !           934:   ASM_OUTPUT_SHORT (FILE, const0_rtx);                                 \
        !           935:   ASM_OUTPUT_SHORT (FILE, const0_rtx);                                 \
        !           936: }
        !           937: 
        !           938: /* Length in units of the trampoline for entering a nested function.  */
        !           939: 
        !           940: #define TRAMPOLINE_SIZE 26
        !           941: 
        !           942: /* Alignment required for a trampoline.  16 is used to find the
        !           943:    beginning of a line in the instruction cache.  */
        !           944: 
        !           945: #define TRAMPOLINE_ALIGN 16
        !           946: 
        !           947: /* Emit RTL insns to initialize the variable parts of a trampoline.
        !           948:    FNADDR is an RTX for the address of the function's pure code.
        !           949:    CXT is an RTX for the static chain value for the function.  */
        !           950: 
        !           951: #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)                      \
        !           952: {                                                                      \
        !           953:   emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 2)), TRAMP); \
        !           954:   emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 18)), CXT); \
        !           955:   emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 22)), FNADDR); \
        !           956: }
        !           957: 
        !           958: /* This is the library routine that is used
        !           959:    to transfer control from the trampoline
        !           960:    to the actual nested function.  */
        !           961: 
        !           962: /* A colon is used with no explicit operands
        !           963:    to cause the template string to be scanned for %-constructs.  */
        !           964: /* The function name __transfer_from_trampoline is not actually used.
        !           965:    The function definition just permits use of "asm with operands"
        !           966:    (though the operand list is empty).  */
        !           967: #define TRANSFER_FROM_TRAMPOLINE                               \
        !           968: void                                                           \
        !           969: __transfer_from_trampoline ()                                  \
        !           970: {                                                              \
        !           971:   register char *a0 asm ("%a0");                               \
        !           972:   asm ("___trampoline:");                                      \
        !           973:   asm volatile ("mov%.l %0,%@" : : "m" (a0[22]));              \
        !           974:   asm volatile ("mov%.l %1,%0" : "=a" (a0) : "m" (a0[18]));    \
        !           975:   asm ("rts":);                                                        \
        !           976: }
        !           977: 
        !           978: /* Addressing modes, and classification of registers for them.  */
        !           979: 
        !           980: #define HAVE_POST_INCREMENT
        !           981: /* #define HAVE_POST_DECREMENT */
        !           982: 
        !           983: #define HAVE_PRE_DECREMENT
        !           984: /* #define HAVE_PRE_INCREMENT */
        !           985: 
        !           986: /* Macros to check register numbers against specific register classes.  */
        !           987: 
        !           988: /* These assume that REGNO is a hard or pseudo reg number.
        !           989:    They give nonzero only if REGNO is a hard reg of the suitable class
        !           990:    or a pseudo reg currently allocated to a suitable hard reg.
        !           991:    Since they use reg_renumber, they are safe only once reg_renumber
        !           992:    has been allocated, which happens in local-alloc.c.  */
        !           993: 
        !           994: #define REGNO_OK_FOR_INDEX_P(REGNO) \
        !           995: ((REGNO) < 16 || (unsigned) reg_renumber[REGNO] < 16)
        !           996: #define REGNO_OK_FOR_BASE_P(REGNO) \
        !           997: (((REGNO) ^ 010) < 8 || (unsigned) (reg_renumber[REGNO] ^ 010) < 8)
        !           998: #define REGNO_OK_FOR_DATA_P(REGNO) \
        !           999: ((REGNO) < 8 || (unsigned) reg_renumber[REGNO] < 8)
        !          1000: #define REGNO_OK_FOR_FP_P(REGNO) \
        !          1001: (((REGNO) ^ 020) < 8 || (unsigned) (reg_renumber[REGNO] ^ 020) < 8)
        !          1002: #ifdef SUPPORT_SUN_FPA
        !          1003: #define REGNO_OK_FOR_FPA_P(REGNO) \
        !          1004: (((REGNO) >= 24 && (REGNO) < 56) || (reg_renumber[REGNO] >= 24 && reg_renumber[REGNO] < 56))
        !          1005: #endif
        !          1006: 
        !          1007: /* Now macros that check whether X is a register and also,
        !          1008:    strictly, whether it is in a specified class.
        !          1009: 
        !          1010:    These macros are specific to the 68000, and may be used only
        !          1011:    in code for printing assembler insns and in conditions for
        !          1012:    define_optimization.  */
        !          1013: 
        !          1014: /* 1 if X is a data register.  */
        !          1015: 
        !          1016: #define DATA_REG_P(X) (REG_P (X) && REGNO_OK_FOR_DATA_P (REGNO (X)))
        !          1017: 
        !          1018: /* 1 if X is an fp register.  */
        !          1019: 
        !          1020: #define FP_REG_P(X) (REG_P (X) && REGNO_OK_FOR_FP_P (REGNO (X)))
        !          1021: 
        !          1022: /* 1 if X is an address register  */
        !          1023: 
        !          1024: #define ADDRESS_REG_P(X) (REG_P (X) && REGNO_OK_FOR_BASE_P (REGNO (X)))
        !          1025: 
        !          1026: #ifdef SUPPORT_SUN_FPA
        !          1027: /* 1 if X is a register in the Sun FPA.  */
        !          1028: #define FPA_REG_P(X) (REG_P (X) && REGNO_OK_FOR_FPA_P (REGNO (X)))
        !          1029: #else
        !          1030: /* Answer must be no if we don't have an FPA.  */
        !          1031: #define FPA_REG_P(X) 0
        !          1032: #endif
        !          1033: 
        !          1034: /* Maximum number of registers that can appear in a valid memory address.  */
        !          1035: 
        !          1036: #define MAX_REGS_PER_ADDRESS 2
        !          1037: 
        !          1038: /* Recognize any constant value that is a valid address.  */
        !          1039: 
        !          1040: #define CONSTANT_ADDRESS_P(X)  CONSTANT_P (X)
        !          1041: 
        !          1042: /* Nonzero if the constant value X is a legitimate general operand.
        !          1043:    It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.  */
        !          1044: 
        !          1045: #define LEGITIMATE_CONSTANT_P(X) 1
        !          1046: 
        !          1047: /* Nonzero if the constant value X is a legitimate general operand
        !          1048:    when generating PIC code.  It is given that flag_pic is on and 
        !          1049:    that X satisfies CONSTANT_P or is a CONST_DOUBLE.  */
        !          1050: 
        !          1051: #define LEGITIMATE_PIC_OPERAND_P(X)    \
        !          1052:   (! symbolic_operand (X, VOIDmode))
        !          1053: 
        !          1054: /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
        !          1055:    and check its validity for a certain class.
        !          1056:    We have two alternate definitions for each of them.
        !          1057:    The usual definition accepts all pseudo regs; the other rejects
        !          1058:    them unless they have been allocated suitable hard regs.
        !          1059:    The symbol REG_OK_STRICT causes the latter definition to be used.
        !          1060: 
        !          1061:    Most source files want to accept pseudo regs in the hope that
        !          1062:    they will get allocated to the class that the insn wants them to be in.
        !          1063:    Source files for reload pass need to be strict.
        !          1064:    After reload, it makes no difference, since pseudo regs have
        !          1065:    been eliminated by then.  */
        !          1066: 
        !          1067: #ifndef REG_OK_STRICT
        !          1068: 
        !          1069: /* Nonzero if X is a hard reg that can be used as an index
        !          1070:    or if it is a pseudo reg.  */
        !          1071: #define REG_OK_FOR_INDEX_P(X) ((REGNO (X) ^ 020) >= 8)
        !          1072: /* Nonzero if X is a hard reg that can be used as a base reg
        !          1073:    or if it is a pseudo reg.  */
        !          1074: #define REG_OK_FOR_BASE_P(X) ((REGNO (X) & ~027) != 0)
        !          1075: 
        !          1076: #else
        !          1077: 
        !          1078: /* Nonzero if X is a hard reg that can be used as an index.  */
        !          1079: #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
        !          1080: /* Nonzero if X is a hard reg that can be used as a base reg.  */
        !          1081: #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
        !          1082: 
        !          1083: #endif
        !          1084: 
        !          1085: /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
        !          1086:    that is a valid memory address for an instruction.
        !          1087:    The MODE argument is the machine mode for the MEM expression
        !          1088:    that wants to use this address.
        !          1089: 
        !          1090:    When generating PIC, an address involving a SYMBOL_REF is legitimate
        !          1091:    if and only if it is the sum of pic_offset_table_rtx and the SYMBOL_REF.
        !          1092:    We use LEGITIMATE_PIC_OPERAND_P to throw out the illegitimate addresses,
        !          1093:    and we explicitly check for the sum of pic_offset_table_rtx and a SYMBOL_REF.
        !          1094: 
        !          1095:    Likewise for a LABEL_REF when generating PIC.
        !          1096: 
        !          1097:    The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS.  */
        !          1098: 
        !          1099: #define INDIRECTABLE_1_ADDRESS_P(X)  \
        !          1100:   ((CONSTANT_ADDRESS_P (X) && (!flag_pic || LEGITIMATE_PIC_OPERAND_P (X))) \
        !          1101:    || (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X))                   \
        !          1102:    || ((GET_CODE (X) == PRE_DEC || GET_CODE (X) == POST_INC)           \
        !          1103:        && REG_P (XEXP (X, 0))                                          \
        !          1104:        && REG_OK_FOR_BASE_P (XEXP (X, 0)))                             \
        !          1105:    || (GET_CODE (X) == PLUS                                            \
        !          1106:        && REG_P (XEXP (X, 0)) && REG_OK_FOR_BASE_P (XEXP (X, 0))       \
        !          1107:        && GET_CODE (XEXP (X, 1)) == CONST_INT                          \
        !          1108:        && ((unsigned) INTVAL (XEXP (X, 1)) + 0x8000) < 0x10000)                \
        !          1109:    || (GET_CODE (X) == PLUS && XEXP (X, 0) == pic_offset_table_rtx     \
        !          1110:        && flag_pic && GET_CODE (XEXP (X, 1)) == SYMBOL_REF)            \
        !          1111:    || (GET_CODE (X) == PLUS && XEXP (X, 0) == pic_offset_table_rtx     \
        !          1112:        && flag_pic && GET_CODE (XEXP (X, 1)) == LABEL_REF))            \
        !          1113: 
        !          1114: #if 0
        !          1115: /* This should replace the last two (non-pic) lines
        !          1116:    except that Sun's assembler does not seem to handle such operands.  */
        !          1117:        && (TARGET_68020 ? CONSTANT_ADDRESS_P (XEXP (X, 1))             \
        !          1118:           : (GET_CODE (XEXP (X, 1)) == CONST_INT                       \
        !          1119:              && ((unsigned) INTVAL (XEXP (X, 1)) + 0x8000) < 0x10000))))
        !          1120: #endif
        !          1121: 
        !          1122: 
        !          1123: #define GO_IF_NONINDEXED_ADDRESS(X, ADDR)  \
        !          1124: { if (INDIRECTABLE_1_ADDRESS_P (X)) goto ADDR; }
        !          1125: 
        !          1126: #define GO_IF_INDEXABLE_BASE(X, ADDR)  \
        !          1127: { if (GET_CODE (X) == LABEL_REF) goto ADDR;                            \
        !          1128:   if (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X)) goto ADDR; }
        !          1129: 
        !          1130: #define GO_IF_INDEXING(X, ADDR)        \
        !          1131: { if (GET_CODE (X) == PLUS && LEGITIMATE_INDEX_P (XEXP (X, 0)))                \
        !          1132:     { GO_IF_INDEXABLE_BASE (XEXP (X, 1), ADDR); }                      \
        !          1133:   if (GET_CODE (X) == PLUS && LEGITIMATE_INDEX_P (XEXP (X, 1)))                \
        !          1134:     { GO_IF_INDEXABLE_BASE (XEXP (X, 0), ADDR); } }
        !          1135: 
        !          1136: #define GO_IF_INDEXED_ADDRESS(X, ADDR)  \
        !          1137: { GO_IF_INDEXING (X, ADDR);                                            \
        !          1138:   if (GET_CODE (X) == PLUS)                                            \
        !          1139:     { if (GET_CODE (XEXP (X, 1)) == CONST_INT                          \
        !          1140:          && (unsigned) INTVAL (XEXP (X, 1)) + 0x80 < 0x100)            \
        !          1141:        { rtx go_temp = XEXP (X, 0); GO_IF_INDEXING (go_temp, ADDR); }  \
        !          1142:       if (GET_CODE (XEXP (X, 0)) == CONST_INT                          \
        !          1143:          && (unsigned) INTVAL (XEXP (X, 0)) + 0x80 < 0x100)            \
        !          1144:        { rtx go_temp = XEXP (X, 1); GO_IF_INDEXING (go_temp, ADDR); } } }
        !          1145: 
        !          1146: #define LEGITIMATE_INDEX_REG_P(X)   \
        !          1147:   ((GET_CODE (X) == REG && REG_OK_FOR_INDEX_P (X))     \
        !          1148:    || (GET_CODE (X) == SIGN_EXTEND                     \
        !          1149:        && GET_CODE (XEXP (X, 0)) == REG                        \
        !          1150:        && GET_MODE (XEXP (X, 0)) == HImode             \
        !          1151:        && REG_OK_FOR_INDEX_P (XEXP (X, 0))))
        !          1152: 
        !          1153: #define LEGITIMATE_INDEX_P(X)   \
        !          1154:    (LEGITIMATE_INDEX_REG_P (X)                         \
        !          1155:     || (TARGET_68020 && GET_CODE (X) == MULT           \
        !          1156:        && LEGITIMATE_INDEX_REG_P (XEXP (X, 0))         \
        !          1157:        && GET_CODE (XEXP (X, 1)) == CONST_INT          \
        !          1158:        && (INTVAL (XEXP (X, 1)) == 2                   \
        !          1159:            || INTVAL (XEXP (X, 1)) == 4                \
        !          1160:            || INTVAL (XEXP (X, 1)) == 8)))
        !          1161: 
        !          1162: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR)  \
        !          1163: { GO_IF_NONINDEXED_ADDRESS (X, ADDR);                  \
        !          1164:   GO_IF_INDEXED_ADDRESS (X, ADDR); }
        !          1165: 
        !          1166: /* Try machine-dependent ways of modifying an illegitimate address
        !          1167:    to be legitimate.  If we find one, return the new, valid address.
        !          1168:    This macro is used in only one place: `memory_address' in explow.c.
        !          1169: 
        !          1170:    OLDX is the address as it was before break_out_memory_refs was called.
        !          1171:    In some cases it is useful to look at this to decide what needs to be done.
        !          1172: 
        !          1173:    MODE and WIN are passed so that this macro can use
        !          1174:    GO_IF_LEGITIMATE_ADDRESS.
        !          1175: 
        !          1176:    It is always safe for this macro to do nothing.  It exists to recognize
        !          1177:    opportunities to optimize the output.
        !          1178: 
        !          1179:    For the 68000, we handle X+REG by loading X into a register R and
        !          1180:    using R+REG.  R will go in an address reg and indexing will be used.
        !          1181:    However, if REG is a broken-out memory address or multiplication,
        !          1182:    nothing needs to be done because REG can certainly go in an address reg.  */
        !          1183: 
        !          1184: #define COPY_ONCE(Y) if (!copied) { Y = copy_rtx (Y); copied = ch = 1; }
        !          1185: #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN)   \
        !          1186: { register int ch = (X) != (OLDX);                                     \
        !          1187:   if (GET_CODE (X) == PLUS)                                            \
        !          1188:     { int copied = 0;                                                  \
        !          1189:       if (GET_CODE (XEXP (X, 0)) == MULT)                              \
        !          1190:        { COPY_ONCE (X); XEXP (X, 0) = force_operand (XEXP (X, 0), 0);} \
        !          1191:       if (GET_CODE (XEXP (X, 1)) == MULT)                              \
        !          1192:        { COPY_ONCE (X); XEXP (X, 1) = force_operand (XEXP (X, 1), 0);} \
        !          1193:       if (ch && GET_CODE (XEXP (X, 1)) == REG                          \
        !          1194:          && GET_CODE (XEXP (X, 0)) == REG)                             \
        !          1195:        goto WIN;                                                       \
        !          1196:       if (ch) { GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN); }             \
        !          1197:       if (GET_CODE (XEXP (X, 0)) == REG                                        \
        !          1198:               || (GET_CODE (XEXP (X, 0)) == SIGN_EXTEND                \
        !          1199:                   && GET_CODE (XEXP (XEXP (X, 0), 0)) == REG           \
        !          1200:                   && GET_MODE (XEXP (XEXP (X, 0), 0)) == HImode))      \
        !          1201:        { register rtx temp = gen_reg_rtx (Pmode);                      \
        !          1202:          register rtx val = force_operand (XEXP (X, 1), 0);            \
        !          1203:          emit_move_insn (temp, val);                                   \
        !          1204:          COPY_ONCE (X);                                                \
        !          1205:          XEXP (X, 1) = temp;                                           \
        !          1206:          goto WIN; }                                                   \
        !          1207:       else if (GET_CODE (XEXP (X, 1)) == REG                           \
        !          1208:               || (GET_CODE (XEXP (X, 1)) == SIGN_EXTEND                \
        !          1209:                   && GET_CODE (XEXP (XEXP (X, 1), 0)) == REG           \
        !          1210:                   && GET_MODE (XEXP (XEXP (X, 1), 0)) == HImode))      \
        !          1211:        { register rtx temp = gen_reg_rtx (Pmode);                      \
        !          1212:          register rtx val = force_operand (XEXP (X, 0), 0);            \
        !          1213:          emit_move_insn (temp, val);                                   \
        !          1214:          COPY_ONCE (X);                                                \
        !          1215:          XEXP (X, 0) = temp;                                           \
        !          1216:          goto WIN; }}}
        !          1217: 
        !          1218: /* Go to LABEL if ADDR (a legitimate address expression)
        !          1219:    has an effect that depends on the machine mode it is used for.
        !          1220:    On the 68000, only predecrement and postincrement address depend thus
        !          1221:    (the amount of decrement or increment being the length of the operand).  */
        !          1222: 
        !          1223: #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)       \
        !          1224:  if (GET_CODE (ADDR) == POST_INC || GET_CODE (ADDR) == PRE_DEC) goto LABEL
        !          1225: 
        !          1226: /* Specify the machine mode that this machine uses
        !          1227:    for the index in the tablejump instruction.  */
        !          1228: #define CASE_VECTOR_MODE HImode
        !          1229: 
        !          1230: /* Define this if the tablejump instruction expects the table
        !          1231:    to contain offsets from the address of the table.
        !          1232:    Do not define this if the table should contain absolute addresses.  */
        !          1233: #define CASE_VECTOR_PC_RELATIVE
        !          1234: 
        !          1235: /* Specify the tree operation to be used to convert reals to integers.  */
        !          1236: #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
        !          1237: 
        !          1238: /* This is the kind of divide that is easiest to do in the general case.  */
        !          1239: #define EASY_DIV_EXPR TRUNC_DIV_EXPR
        !          1240: 
        !          1241: /* Define this as 1 if `char' should by default be signed; else as 0.  */
        !          1242: #define DEFAULT_SIGNED_CHAR 1
        !          1243: 
        !          1244: /* Don't cse the address of the function being compiled.  */
        !          1245: #define NO_RECURSIVE_FUNCTION_CSE
        !          1246: 
        !          1247: /* Max number of bytes we can move from memory to memory
        !          1248:    in one reasonably fast instruction.  */
        !          1249: #define MOVE_MAX 4
        !          1250: 
        !          1251: /* Define this if zero-extension is slow (more than one real instruction).  */
        !          1252: #define SLOW_ZERO_EXTEND
        !          1253: 
        !          1254: /* Nonzero if access to memory by bytes is slow and undesirable.  */
        !          1255: #define SLOW_BYTE_ACCESS 0
        !          1256: 
        !          1257: /* Define if shifts truncate the shift count
        !          1258:    which implies one can omit a sign-extension or zero-extension
        !          1259:    of a shift count.  */
        !          1260: #define SHIFT_COUNT_TRUNCATED
        !          1261: 
        !          1262: /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
        !          1263:    is done just by pretending it is already truncated.  */
        !          1264: #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
        !          1265: 
        !          1266: /* We assume that the store-condition-codes instructions store 0 for false
        !          1267:    and some other value for true.  This is the value stored for true.  */
        !          1268: 
        !          1269: #define STORE_FLAG_VALUE -1
        !          1270: 
        !          1271: /* When a prototype says `char' or `short', really pass an `int'.  */
        !          1272: #define PROMOTE_PROTOTYPES
        !          1273: 
        !          1274: /* Specify the machine mode that pointers have.
        !          1275:    After generation of rtl, the compiler makes no further distinction
        !          1276:    between pointers and any other objects of this machine mode.  */
        !          1277: #define Pmode SImode
        !          1278: 
        !          1279: /* A function address in a call instruction
        !          1280:    is a byte address (for indexing purposes)
        !          1281:    so give the MEM rtx a byte's mode.  */
        !          1282: #define FUNCTION_MODE QImode
        !          1283: 
        !          1284: /* Compute the cost of computing a constant rtl expression RTX
        !          1285:    whose rtx-code is CODE.  The body of this macro is a portion
        !          1286:    of a switch statement.  If the code is computed here,
        !          1287:    return it with a return statement.  Otherwise, break from the switch.  */
        !          1288: 
        !          1289: #define CONST_COSTS(RTX,CODE) \
        !          1290:   case CONST_INT:                                              \
        !          1291:     /* Constant zero is super cheap due to clr instruction.  */        \
        !          1292:     if (RTX == const0_rtx) return 0;                           \
        !          1293:     /* Constants between -128 and 127 are cheap due to moveq */ \
        !          1294:     if (INTVAL (RTX) >= -128 && INTVAL (RTX) <= 127) return 1; \
        !          1295:     /* Constants between -136 and 254 are easily generated */  \
        !          1296:     /* by intelligent uses of moveq, add[q], and subq     */   \
        !          1297:     if (INTVAL (RTX) >= -136 && INTVAL (RTX) <= 254) return 2; \
        !          1298:   case CONST:                                                  \
        !          1299:   case LABEL_REF:                                              \
        !          1300:   case SYMBOL_REF:                                             \
        !          1301:     return 3;                                                  \
        !          1302:   case CONST_DOUBLE:                                           \
        !          1303:     return 5;
        !          1304: 
        !          1305: /* Compute the cost of various arithmetic operations.
        !          1306:    These are vaguely right for a 68020.  */
        !          1307: /* The costs for long multiply have been adjusted to
        !          1308:    work properly in synth_mult on the 68020,
        !          1309:    relative to an average of the time for add and the time for shift,
        !          1310:    taking away a little more because sometimes move insns are needed.  */
        !          1311: 
        !          1312: #define RTX_COSTS(X,CODE)                                      \
        !          1313:   case PLUS:                                                   \
        !          1314:     /* An lea costs about three times as much as a simple add.  */  \
        !          1315:     if (GET_MODE (X) == SImode                                 \
        !          1316:        && GET_CODE (XEXP (X, 0)) == REG                        \
        !          1317:        && GET_CODE (XEXP (X, 1)) == MULT                       \
        !          1318:        && GET_CODE (XEXP (XEXP (X, 1), 0)) == REG              \
        !          1319:        && GET_CODE (XEXP (XEXP (X, 1), 1)) == CONST_INT        \
        !          1320:        && (INTVAL (XEXP (XEXP (X, 1), 1)) == 2                 \
        !          1321:            || INTVAL (XEXP (XEXP (X, 1), 1)) == 4              \
        !          1322:            || INTVAL (XEXP (XEXP (X, 1), 1)) == 8))            \
        !          1323:       return COSTS_N_INSNS (3);         /* lea an@(dx:l:i),am */       \
        !          1324:     break;                                                     \
        !          1325:   case ASHIFT:                                                 \
        !          1326:   case ASHIFTRT:                                               \
        !          1327:   case LSHIFT:                                                 \
        !          1328:   case LSHIFTRT:                                               \
        !          1329:     /* A shift by a big integer takes an extra instruction.  */ \
        !          1330:     if (GET_CODE (XEXP (X, 1)) == CONST_INT                    \
        !          1331:        && !(INTVAL (XEXP (X, 1)) > 0                           \
        !          1332:             && INTVAL (XEXP (X, 1)) <= 8))                     \
        !          1333:       return COSTS_N_INSNS (3);         /* lsr #i,dn */                \
        !          1334:     break;                                                     \
        !          1335:   case MULT:                                                   \
        !          1336:     if (GET_CODE (XEXP (x, 1)) == CONST_INT                    \
        !          1337:        && exact_log2 (INTVAL (XEXP (x, 1))) >= 0)              \
        !          1338:       total = 2;                                               \
        !          1339:     else if (GET_MODE (X) == QImode || GET_MODE (X) == HImode) \
        !          1340:       return COSTS_N_INSNS (8); /* mul.w */                    \
        !          1341:     else                                                       \
        !          1342:       return COSTS_N_INSNS (13);        /* mul.l */            \
        !          1343:     break;                                                     \
        !          1344:   case DIV:                                                    \
        !          1345:   case UDIV:                                                   \
        !          1346:   case MOD:                                                    \
        !          1347:   case UMOD:                                                   \
        !          1348:     if (GET_MODE (X) == QImode || GET_MODE (X) == HImode)      \
        !          1349:       return COSTS_N_INSNS (27); /* div.w */                   \
        !          1350:     return COSTS_N_INSNS (43);  /* div.l */
        !          1351: 
        !          1352: /* Tell final.c how to eliminate redundant test instructions.  */
        !          1353: 
        !          1354: /* Here we define machine-dependent flags and fields in cc_status
        !          1355:    (see `conditions.h').  */
        !          1356: 
        !          1357: /* Set if the cc value is actually in the 68881, so a floating point
        !          1358:    conditional branch must be output.  */
        !          1359: #define CC_IN_68881 04000
        !          1360: 
        !          1361: /* Store in cc_status the expressions that the condition codes will
        !          1362:    describe after execution of an instruction whose pattern is EXP.
        !          1363:    Do not alter them if the instruction would not alter the cc's.  */
        !          1364: 
        !          1365: /* On the 68000, all the insns to store in an address register fail to
        !          1366:    set the cc's.  However, in some cases these instructions can make it
        !          1367:    possibly invalid to use the saved cc's.  In those cases we clear out
        !          1368:    some or all of the saved cc's so they won't be used.  */
        !          1369: 
        !          1370: #define NOTICE_UPDATE_CC(EXP,INSN) notice_update_cc (EXP, INSN)
        !          1371: 
        !          1372: #define OUTPUT_JUMP(NORMAL, FLOAT, NO_OV)  \
        !          1373: { if (cc_prev_status.flags & CC_IN_68881)                      \
        !          1374:     return FLOAT;                                              \
        !          1375:   if (cc_prev_status.flags & CC_NO_OVERFLOW)                   \
        !          1376:     return NO_OV;                                              \
        !          1377:   return NORMAL; }
        !          1378: 
        !          1379: /* Control the assembler format that we output.  */
        !          1380: 
        !          1381: /* Output at beginning of assembler file.  */
        !          1382: 
        !          1383: #define ASM_FILE_START(FILE)   \
        !          1384:   fprintf (FILE, "#NO_APP\n");
        !          1385: 
        !          1386: /* Output to assembler file text saying following lines
        !          1387:    may contain character constants, extra white space, comments, etc.  */
        !          1388: 
        !          1389: #define ASM_APP_ON "#APP\n"
        !          1390: 
        !          1391: /* Output to assembler file text saying following lines
        !          1392:    no longer contain unusual constructs.  */
        !          1393: 
        !          1394: #define ASM_APP_OFF "#NO_APP\n"
        !          1395: 
        !          1396: /* Output before read-only data.  */
        !          1397: 
        !          1398: #define TEXT_SECTION_ASM_OP ".text"
        !          1399: 
        !          1400: /* Output before writable data.  */
        !          1401: 
        !          1402: #define DATA_SECTION_ASM_OP ".data"
        !          1403: 
        !          1404: /* Here are four prefixes that are used by asm_fprintf to
        !          1405:    facilitate customization for alternate assembler syntaxes.
        !          1406:    Machines with no likelihood of an alternate syntax need not
        !          1407:    define these and need not use asm_fprintf.  */
        !          1408: 
        !          1409: /* The prefix for register names.  Note that REGISTER_NAMES
        !          1410:    is supposed to include this prefix.  */
        !          1411: 
        !          1412: #define REGISTER_PREFIX ""
        !          1413: 
        !          1414: /* The prefix for local labels.  You should be able to define this as
        !          1415:    an empty string, or any arbitrary string (such as ".", ".L%", etc)
        !          1416:    without having to make any other changes to account for the specific
        !          1417:    definition.  Note it is a string literal, not interpreted by printf
        !          1418:    and friends. */
        !          1419: 
        !          1420: #define LOCAL_LABEL_PREFIX ""
        !          1421: 
        !          1422: /* The prefix to add to user-visible assembler symbols.  */
        !          1423: 
        !          1424: #define USER_LABEL_PREFIX "_"
        !          1425: 
        !          1426: /* The prefix for immediate operands.  */
        !          1427: 
        !          1428: #define IMMEDIATE_PREFIX "#"
        !          1429: 
        !          1430: /* How to refer to registers in assembler output.
        !          1431:    This sequence is indexed by compiler's hard-register-number (see above).  */
        !          1432: 
        !          1433: #ifndef SUPPORT_SUN_FPA
        !          1434: 
        !          1435: #define REGISTER_NAMES \
        !          1436: {"d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7",       \
        !          1437:  "a0", "a1", "a2", "a3", "a4", "a5", "a6", "sp",       \
        !          1438:  "fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7" }
        !          1439: 
        !          1440: #else /* SUPPORTED_SUN_FPA */
        !          1441: 
        !          1442: #define REGISTER_NAMES \
        !          1443: {"d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7",       \
        !          1444:  "a0", "a1", "a2", "a3", "a4", "a5", "a6", "sp",       \
        !          1445:  "fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7", \
        !          1446:  "fpa0", "fpa1", "fpa2", "fpa3", "fpa4", "fpa5", "fpa6", "fpa7", \
        !          1447:  "fpa8", "fpa9", "fpa10", "fpa11", "fpa12", "fpa13", "fpa14", "fpa15", \
        !          1448:  "fpa16", "fpa17", "fpa18", "fpa19", "fpa20", "fpa21", "fpa22", "fpa23", \
        !          1449:  "fpa24", "fpa25", "fpa26", "fpa27", "fpa28", "fpa29", "fpa30", "fpa31" }
        !          1450: 
        !          1451: #endif /* defined SUPPORT_SUN_FPA */
        !          1452: 
        !          1453: /* How to renumber registers for dbx and gdb.
        !          1454:    On the Sun-3, the floating point registers have numbers
        !          1455:    18 to 25, not 16 to 23 as they do in the compiler.  */
        !          1456: 
        !          1457: #define DBX_REGISTER_NUMBER(REGNO) ((REGNO) < 16 ? (REGNO) : (REGNO) + 2)
        !          1458: 
        !          1459: /* This is how to output the definition of a user-level label named NAME,
        !          1460:    such as the label on a static function or variable NAME.  */
        !          1461: 
        !          1462: #define ASM_OUTPUT_LABEL(FILE,NAME)    \
        !          1463:   do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
        !          1464: 
        !          1465: /* This is how to output a command to make the user-level label named NAME
        !          1466:    defined for reference from other files.  */
        !          1467: 
        !          1468: #define ASM_GLOBALIZE_LABEL(FILE,NAME) \
        !          1469:   do { fputs (".globl ", FILE); assemble_name (FILE, NAME); fputs ("\n", FILE);} while (0)
        !          1470: 
        !          1471: /* This is how to output a reference to a user-level label named NAME.
        !          1472:    `assemble_name' uses this.  */
        !          1473: 
        !          1474: #define ASM_OUTPUT_LABELREF(FILE,NAME) \
        !          1475:   asm_fprintf (FILE, "%U%s", NAME)
        !          1476: 
        !          1477: /* This is how to output an internal numbered label where
        !          1478:    PREFIX is the class of label and NUM is the number within the class.  */
        !          1479: 
        !          1480: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)     \
        !          1481:   asm_fprintf (FILE, "%L%s%d:\n", PREFIX, NUM)
        !          1482: 
        !          1483: /* This is how to store into the string LABEL
        !          1484:    the symbol_ref name of an internal numbered label where
        !          1485:    PREFIX is the class of label and NUM is the number within the class.
        !          1486:    This is suitable for output with `assemble_name'.  */
        !          1487: 
        !          1488: #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)  \
        !          1489:   sprintf (LABEL, "*%s%s%d", LOCAL_LABEL_PREFIX, PREFIX, NUM)
        !          1490: 
        !          1491: /* This is how to output an assembler line defining a `double' constant.  */
        !          1492: 
        !          1493: #define ASM_OUTPUT_DOUBLE(FILE,VALUE)  \
        !          1494:   fprintf (FILE, "\t.double 0r%.20g\n", (VALUE))
        !          1495: 
        !          1496: /* This is how to output an assembler line defining a `float' constant.  */
        !          1497: 
        !          1498: /* Sun's assembler can't handle floating constants written as floating.
        !          1499:    However, when cross-compiling, always use that in case format differs.  */
        !          1500: 
        !          1501: #ifdef CROSS_COMPILE
        !          1502: 
        !          1503: #define ASM_OUTPUT_FLOAT(FILE,VALUE)  \
        !          1504:   fprintf (FILE, "\t.float 0r%.10g\n", (VALUE))
        !          1505: 
        !          1506: #else
        !          1507: 
        !          1508: #define ASM_OUTPUT_FLOAT(FILE,VALUE)  \
        !          1509: do { union { float f; long l;} tem;                    \
        !          1510:      tem.f = (VALUE);                                  \
        !          1511:      fprintf (FILE, "\t.long 0x%x\n", tem.l);  \
        !          1512:    } while (0)
        !          1513: 
        !          1514: #endif /* not CROSS_COMPILER */
        !          1515: 
        !          1516: /* This is how to output an assembler line defining an `int' constant.  */
        !          1517: 
        !          1518: #define ASM_OUTPUT_INT(FILE,VALUE)  \
        !          1519: ( fprintf (FILE, "\t.long "),                  \
        !          1520:   output_addr_const (FILE, (VALUE)),           \
        !          1521:   fprintf (FILE, "\n"))
        !          1522: 
        !          1523: /* Likewise for `char' and `short' constants.  */
        !          1524: 
        !          1525: #define ASM_OUTPUT_SHORT(FILE,VALUE)  \
        !          1526: ( fprintf (FILE, "\t.word "),                  \
        !          1527:   output_addr_const (FILE, (VALUE)),           \
        !          1528:   fprintf (FILE, "\n"))
        !          1529: 
        !          1530: #define ASM_OUTPUT_CHAR(FILE,VALUE)  \
        !          1531: ( fprintf (FILE, "\t.byte "),                  \
        !          1532:   output_addr_const (FILE, (VALUE)),           \
        !          1533:   fprintf (FILE, "\n"))
        !          1534: 
        !          1535: /* This is how to output an assembler line for a numeric constant byte.  */
        !          1536: 
        !          1537: #define ASM_OUTPUT_BYTE(FILE,VALUE)  \
        !          1538:   fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
        !          1539: 
        !          1540: /* This is how to output an insn to push a register on the stack.
        !          1541:    It need not be very fast code.  */
        !          1542: 
        !          1543: #define ASM_OUTPUT_REG_PUSH(FILE,REGNO)  \
        !          1544:   asm_fprintf (FILE, "\tmovel %s,%Rsp@-\n", reg_names[REGNO])
        !          1545: 
        !          1546: /* This is how to output an insn to pop a register from the stack.
        !          1547:    It need not be very fast code.  */
        !          1548: 
        !          1549: #define ASM_OUTPUT_REG_POP(FILE,REGNO)  \
        !          1550:   asm_fprintf (FILE, "\tmovel %Rsp@+,%s\n", reg_names[REGNO])
        !          1551: 
        !          1552: /* This is how to output an element of a case-vector that is absolute.
        !          1553:    (The 68000 does not use such vectors,
        !          1554:    but we must define this macro anyway.)  */
        !          1555: 
        !          1556: #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
        !          1557:   asm_fprintf (FILE, "\t.long %LL%d\n", VALUE)
        !          1558: 
        !          1559: /* This is how to output an element of a case-vector that is relative.  */
        !          1560: 
        !          1561: #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL)  \
        !          1562:   asm_fprintf (FILE, "\t.word %LL%d-%LL%d\n", VALUE, REL)
        !          1563: 
        !          1564: /* This is how to output an assembler line
        !          1565:    that says to advance the location counter
        !          1566:    to a multiple of 2**LOG bytes.  */
        !          1567: 
        !          1568: #define ASM_OUTPUT_ALIGN(FILE,LOG)     \
        !          1569:   if ((LOG) == 1)                      \
        !          1570:     fprintf (FILE, "\t.even\n");       \
        !          1571:   else if ((LOG) != 0)                 \
        !          1572:     abort ();
        !          1573: 
        !          1574: #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
        !          1575:   fprintf (FILE, "\t.skip %u\n", (SIZE))
        !          1576: 
        !          1577: /* This says how to output an assembler line
        !          1578:    to define a global common symbol.  */
        !          1579: 
        !          1580: #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
        !          1581: ( fputs (".comm ", (FILE)),                    \
        !          1582:   assemble_name ((FILE), (NAME)),              \
        !          1583:   fprintf ((FILE), ",%u\n", (ROUNDED)))
        !          1584: 
        !          1585: /* This says how to output an assembler line
        !          1586:    to define a local common symbol.  */
        !          1587: 
        !          1588: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
        !          1589: ( fputs (".lcomm ", (FILE)),                   \
        !          1590:   assemble_name ((FILE), (NAME)),              \
        !          1591:   fprintf ((FILE), ",%u\n", (ROUNDED)))
        !          1592: 
        !          1593: /* Store in OUTPUT a string (made with alloca) containing
        !          1594:    an assembler-name for a local static variable named NAME.
        !          1595:    LABELNO is an integer which is different for each call.  */
        !          1596: 
        !          1597: #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
        !          1598: ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10),   \
        !          1599:   sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
        !          1600: 
        !          1601: /* Define the parentheses used to group arithmetic operations
        !          1602:    in assembler code.  */
        !          1603: 
        !          1604: #define ASM_OPEN_PAREN "("
        !          1605: #define ASM_CLOSE_PAREN ")"
        !          1606: 
        !          1607: /* Define results of standard character escape sequences.  */
        !          1608: #define TARGET_BELL 007
        !          1609: #define TARGET_BS 010
        !          1610: #define TARGET_TAB 011
        !          1611: #define TARGET_NEWLINE 012
        !          1612: #define TARGET_VT 013
        !          1613: #define TARGET_FF 014
        !          1614: #define TARGET_CR 015
        !          1615: 
        !          1616: /* Output a float value (represented as a C double) as an immediate operand.
        !          1617:    This macro is a 68k-specific macro.  */
        !          1618: #define ASM_OUTPUT_FLOAT_OPERAND(FILE,VALUE)                           \
        !          1619:   asm_fprintf (FILE, "%I0r%.9g", (VALUE))
        !          1620: 
        !          1621: /* Output a double value (represented as a C double) as an immediate operand.
        !          1622:    This macro is a 68k-specific macro.  */
        !          1623: #define ASM_OUTPUT_DOUBLE_OPERAND(FILE,VALUE)                          \
        !          1624:   asm_fprintf (FILE, "%I0r%.20g", (VALUE))
        !          1625: 
        !          1626: /* Print operand X (an rtx) in assembler syntax to file FILE.
        !          1627:    CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
        !          1628:    For `%' followed by punctuation, CODE is the punctuation and X is null.
        !          1629: 
        !          1630:    On the 68000, we use several CODE characters:
        !          1631:    '.' for dot needed in Motorola-style opcode names.
        !          1632:    '-' for an operand pushing on the stack:
        !          1633:        sp@-, -(sp) or -(%sp) depending on the style of syntax.
        !          1634:    '+' for an operand pushing on the stack:
        !          1635:        sp@+, (sp)+ or (%sp)+ depending on the style of syntax.
        !          1636:    '@' for a reference to the top word on the stack:
        !          1637:        sp@, (sp) or (%sp) depending on the style of syntax.
        !          1638:    '#' for an immediate operand prefix (# in MIT and Motorola syntax
        !          1639:        but & in SGS syntax).
        !          1640:    '!' for the cc register (used in an `and to cc' insn).
        !          1641:    '$' for the letter `s' in an op code, but only on the 68040.
        !          1642:    '&' for the letter `d' in an op code, but only on the 68040.
        !          1643: 
        !          1644:    'b' for byte insn (no effect, on the Sun; this is for the ISI).
        !          1645:    'd' to force memory addressing to be absolute, not relative.
        !          1646:    'f' for float insn (print a CONST_DOUBLE as a float rather than in hex)
        !          1647:    'w' for FPA insn (print a CONST_DOUBLE as a SunFPA constant rather
        !          1648:        than directly).  Second part of 'y' below.
        !          1649:    'x' for float insn (print a CONST_DOUBLE as a float rather than in hex),
        !          1650:        or print pair of registers as rx:ry.
        !          1651:    'y' for a FPA insn (print pair of registers as rx:ry).  This also outputs
        !          1652:        CONST_DOUBLE's as SunFPA constant RAM registers if
        !          1653:        possible, so it should not be used except for the SunFPA. */
        !          1654: 
        !          1655: #define PRINT_OPERAND_PUNCT_VALID_P(CODE)                              \
        !          1656:   ((CODE) == '.' || (CODE) == '#' || (CODE) == '-'                     \
        !          1657:    || (CODE) == '+' || (CODE) == '@' || (CODE) == '!'                  \
        !          1658:    || (CODE) == '$' || (CODE) == '&')
        !          1659: 
        !          1660: #ifdef HOST_WORDS_BIG_ENDIAN
        !          1661: #define PRINT_OPERAND_EXTRACT_FLOAT(X)                                 \
        !          1662:       u.i[0] = CONST_DOUBLE_LOW (X); u.i[1] = CONST_DOUBLE_HIGH (X);
        !          1663: #else
        !          1664: #define PRINT_OPERAND_EXTRACT_FLOAT(X)                                 \
        !          1665:       u.i[0] = CONST_DOUBLE_HIGH (X); u.i[1] = CONST_DOUBLE_LOW (X);
        !          1666: #endif
        !          1667: 
        !          1668: #ifdef CROSS_COMPILER
        !          1669: #define PRINT_OPERAND_PRINT_FLOAT(CODE, FILE)   \
        !          1670:   ASM_OUTPUT_FLOAT_OPERAND (FILE, u1.f);
        !          1671: #else
        !          1672: #define PRINT_OPERAND_PRINT_FLOAT(CODE, FILE)   \
        !          1673: { if (CODE == 'f')                                                     \
        !          1674:     ASM_OUTPUT_FLOAT_OPERAND (FILE, u1.f);                             \
        !          1675:   else                                                                 \
        !          1676:     asm_fprintf (FILE, "%I0x%x", u1.i); }
        !          1677: #endif
        !          1678: 
        !          1679: /* A C compound statement to output to stdio stream STREAM the
        !          1680:    assembler syntax for an instruction operand X.  X is an RTL
        !          1681:    expression.
        !          1682: 
        !          1683:    CODE is a value that can be used to specify one of several ways
        !          1684:    of printing the operand.  It is used when identical operands
        !          1685:    must be printed differently depending on the context.  CODE
        !          1686:    comes from the `%' specification that was used to request
        !          1687:    printing of the operand.  If the specification was just `%DIGIT'
        !          1688:    then CODE is 0; if the specification was `%LTR DIGIT' then CODE
        !          1689:    is the ASCII code for LTR.
        !          1690: 
        !          1691:    If X is a register, this macro should print the register's name.
        !          1692:    The names can be found in an array `reg_names' whose type is
        !          1693:    `char *[]'.  `reg_names' is initialized from `REGISTER_NAMES'.
        !          1694: 
        !          1695:    When the machine description has a specification `%PUNCT' (a `%'
        !          1696:    followed by a punctuation character), this macro is called with
        !          1697:    a null pointer for X and the punctuation character for CODE.
        !          1698: 
        !          1699:    See m68k.c for the m68k specific codes.  */
        !          1700: 
        !          1701: #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE)
        !          1702: 
        !          1703: /* A C compound statement to output to stdio stream STREAM the
        !          1704:    assembler syntax for an instruction operand that is a memory
        !          1705:    reference whose address is ADDR.  ADDR is an RTL expression.
        !          1706: 
        !          1707:    On some machines, the syntax for a symbolic address depends on
        !          1708:    the section that the address refers to.  On these machines,
        !          1709:    define the macro `ENCODE_SECTION_INFO' to store the information
        !          1710:    into the `symbol_ref', and then check for it here.  */
        !          1711: 
        !          1712: #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR)
        !          1713: 
        !          1714: 
        !          1715: /* Define functions defined in aux-output.c and used in templates.  */
        !          1716: 
        !          1717: extern char *output_move_double ();
        !          1718: extern char *output_move_const_single ();
        !          1719: extern char *output_move_const_double ();
        !          1720: extern char *output_btst ();
        !          1721: 
        !          1722: /*
        !          1723: Local variables:
        !          1724: version-control: t
        !          1725: End:
        !          1726: */

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