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Annotation of gcc/config/m68k/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, 1993 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, but still allow execution on 68020
        !            85:    (-m68020-40 or -m68040).
        !            86:    The 68040 will execute all 68030 and 68881/2 instructions, but some
        !            87:    of them must be emulated in software by the OS.  When TARGET_68040 is
        !            88:    turned on, these instructions won't be used.  This code will still
        !            89:    run on a 68030 and 68881/2. */
        !            90: #define TARGET_68040 (target_flags & 01400)
        !            91: 
        !            92: /* Use the 68040-only fp instructions (-m68040).  */
        !            93: #define TARGET_68040_ONLY (target_flags & 01000)
        !            94: 
        !            95: /* Macro to define tables used to set the flags.
        !            96:    This is a list in braces of pairs in braces,
        !            97:    each pair being { "NAME", VALUE }
        !            98:    where VALUE is the bits to set or minus the bits to clear.
        !            99:    An empty string NAME is used to identify the default VALUE.  */
        !           100: 
        !           101: #define TARGET_SWITCHES  \
        !           102:   { { "68020", -01400},                                \
        !           103:     { "c68020", -01400},                       \
        !           104:     { "68020", 5},                             \
        !           105:     { "c68020", 5},                            \
        !           106:     { "68881", 2},                             \
        !           107:     { "bitfield", 4},                          \
        !           108:     { "68000", -01405},                                \
        !           109:     { "c68000", -01405},                       \
        !           110:     { "soft-float", -01102},                   \
        !           111:     { "nobitfield", -4},                       \
        !           112:     { "rtd", 8},                               \
        !           113:     { "nortd", -8},                            \
        !           114:     { "short", 040},                           \
        !           115:     { "noshort", -040},                                \
        !           116:     { "fpa", 0100},                            \
        !           117:     { "nofpa", -0100},                         \
        !           118:     { "sky", 0200},                            \
        !           119:     { "nosky", -0200},                         \
        !           120:     { "68020-40", 0407},                       \
        !           121:     { "68030", -01400},                                \
        !           122:     { "68030", 5},                             \
        !           123:     { "68040", 01007},                         \
        !           124:     { "", TARGET_DEFAULT}}
        !           125: /* TARGET_DEFAULT is defined in sun*.h and isi.h, etc.  */
        !           126: 
        !           127: #ifdef SUPPORT_SUN_FPA
        !           128: /* Blow away 68881 flag silently on TARGET_FPA (since we can't clear
        !           129:    any bits in TARGET_SWITCHES above) */
        !           130: #define OVERRIDE_OPTIONS               \
        !           131: {                                      \
        !           132:   if (TARGET_FPA) target_flags &= ~2;  \
        !           133:   if (! TARGET_68020 && flag_pic == 2) \
        !           134:     error("-fPIC is not currently supported on the 68000 or 68010\n"); \
        !           135: }
        !           136: #else
        !           137: #define OVERRIDE_OPTIONS               \
        !           138: {                                      \
        !           139:   if (! TARGET_68020 && flag_pic == 2) \
        !           140:     error("-fPIC is not currently supported on the 68000 or 68010\n"); \
        !           141: }
        !           142: #endif /* defined SUPPORT_SUN_FPA */
        !           143: 
        !           144: /* target machine storage layout */
        !           145: 
        !           146: /* Define for XFmode extended real floating point support.
        !           147:    This will automatically cause REAL_ARITHMETIC to be defined.  */
        !           148: #define LONG_DOUBLE_TYPE_SIZE 96
        !           149: 
        !           150: /* Define if you don't want extended real, but do want to use the
        !           151:    software floating point emulator for REAL_ARITHMETIC and
        !           152:    decimal <-> binary conversion. */
        !           153: /* #define REAL_ARITHMETIC */
        !           154: 
        !           155: /* Define this if most significant bit is lowest numbered
        !           156:    in instructions that operate on numbered bit-fields.
        !           157:    This is true for 68020 insns such as bfins and bfexts.
        !           158:    We make it true always by avoiding using the single-bit insns
        !           159:    except in special cases with constant bit numbers.  */
        !           160: #define BITS_BIG_ENDIAN 1
        !           161: 
        !           162: /* Define this if most significant byte of a word is the lowest numbered.  */
        !           163: /* That is true on the 68000.  */
        !           164: #define BYTES_BIG_ENDIAN 1
        !           165: 
        !           166: /* Define this if most significant word of a multiword number is the lowest
        !           167:    numbered.  */
        !           168: /* For 68000 we can decide arbitrarily
        !           169:    since there are no machine instructions for them.
        !           170:    So let's be consistent.  */
        !           171: #define WORDS_BIG_ENDIAN 1
        !           172: 
        !           173: /* number of bits in an addressable storage unit */
        !           174: #define BITS_PER_UNIT 8
        !           175: 
        !           176: /* Width in bits of a "word", which is the contents of a machine register.
        !           177:    Note that this is not necessarily the width of data type `int';
        !           178:    if using 16-bit ints on a 68000, this would still be 32.
        !           179:    But on a machine with 16-bit registers, this would be 16.  */
        !           180: #define BITS_PER_WORD 32
        !           181: 
        !           182: /* Width of a word, in units (bytes).  */
        !           183: #define UNITS_PER_WORD 4
        !           184: 
        !           185: /* Width in bits of a pointer.
        !           186:    See also the macro `Pmode' defined below.  */
        !           187: #define POINTER_SIZE 32
        !           188: 
        !           189: /* Allocation boundary (in *bits*) for storing arguments in argument list.  */
        !           190: #define PARM_BOUNDARY (TARGET_SHORT ? 16 : 32)
        !           191: 
        !           192: /* Boundary (in *bits*) on which stack pointer should be aligned.  */
        !           193: #define STACK_BOUNDARY 16
        !           194: 
        !           195: /* Allocation boundary (in *bits*) for the code of a function.  */
        !           196: #define FUNCTION_BOUNDARY 16
        !           197: 
        !           198: /* Alignment of field after `int : 0' in a structure.  */
        !           199: #define EMPTY_FIELD_BOUNDARY 16
        !           200: 
        !           201: /* No data type wants to be aligned rounder than this.  */
        !           202: #define BIGGEST_ALIGNMENT 16
        !           203: 
        !           204: /* Set this nonzero if move instructions will actually fail to work
        !           205:    when given unaligned data.  */
        !           206: #define STRICT_ALIGNMENT 1
        !           207: 
        !           208: #define SELECT_RTX_SECTION(MODE, X)                                    \
        !           209: {                                                                      \
        !           210:   if (!flag_pic)                                                       \
        !           211:     readonly_data_section();                                           \
        !           212:   else if (LEGITIMATE_PIC_OPERAND_P (X))                               \
        !           213:     readonly_data_section();                                           \
        !           214:   else                                                                 \
        !           215:     data_section();                                                    \
        !           216: }
        !           217: 
        !           218: /* Define number of bits in most basic integer type.
        !           219:    (If undefined, default is BITS_PER_WORD).  */
        !           220: 
        !           221: #define INT_TYPE_SIZE (TARGET_SHORT ? 16 : 32)
        !           222: 
        !           223: /* Define these to avoid dependence on meaning of `int'.
        !           224:    Note that WCHAR_TYPE_SIZE is used in cexp.y,
        !           225:    where TARGET_SHORT is not available.  */
        !           226: 
        !           227: #define WCHAR_TYPE "long int"
        !           228: #define WCHAR_TYPE_SIZE 32
        !           229: 
        !           230: /* Standard register usage.  */
        !           231: 
        !           232: /* Number of actual hardware registers.
        !           233:    The hardware registers are assigned numbers for the compiler
        !           234:    from 0 to just below FIRST_PSEUDO_REGISTER.
        !           235:    All registers that the compiler knows about must be given numbers,
        !           236:    even those that are not normally considered general registers.
        !           237:    For the 68000, we give the data registers numbers 0-7,
        !           238:    the address registers numbers 010-017,
        !           239:    and the 68881 floating point registers numbers 020-027.  */
        !           240: #ifndef SUPPORT_SUN_FPA
        !           241: #define FIRST_PSEUDO_REGISTER 24
        !           242: #else
        !           243: #define FIRST_PSEUDO_REGISTER 56
        !           244: #endif
        !           245: 
        !           246: /* This defines the register which is used to hold the offset table for PIC. */
        !           247: #define PIC_OFFSET_TABLE_REGNUM 13
        !           248: 
        !           249: /* Used to output a (use pic_offset_table_rtx) so that we 
        !           250:    always save/restore a5 in functions that use PIC relocation
        !           251:    at *any* time during the compilation process. */
        !           252: #define FINALIZE_PIC finalize_pic()
        !           253: 
        !           254: #ifndef SUPPORT_SUN_FPA
        !           255: 
        !           256: /* 1 for registers that have pervasive standard uses
        !           257:    and are not available for the register allocator.
        !           258:    On the 68000, only the stack pointer is such.  */
        !           259: 
        !           260: #define FIXED_REGISTERS        \
        !           261:  {/* Data registers.  */       \
        !           262:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           263:                                \
        !           264:   /* Address registers.  */    \
        !           265:   0, 0, 0, 0, 0, 0, 0, 1,      \
        !           266:                                \
        !           267:   /* Floating point registers  \
        !           268:      (if available).  */       \
        !           269:   0, 0, 0, 0, 0, 0, 0, 0 }
        !           270: 
        !           271: /* 1 for registers not available across function calls.
        !           272:    These must include the FIXED_REGISTERS and also any
        !           273:    registers that can be used without being saved.
        !           274:    The latter must include the registers where values are returned
        !           275:    and the register where structure-value addresses are passed.
        !           276:    Aside from that, you can include as many other registers as you like.  */
        !           277: #define CALL_USED_REGISTERS \
        !           278:  {1, 1, 0, 0, 0, 0, 0, 0,   \
        !           279:   1, 1, 0, 0, 0, 0, 0, 1,   \
        !           280:   1, 1, 0, 0, 0, 0, 0, 0 }
        !           281: 
        !           282: #else /* SUPPORT_SUN_FPA */
        !           283: 
        !           284: /* 1 for registers that have pervasive standard uses
        !           285:    and are not available for the register allocator.
        !           286:    On the 68000, only the stack pointer is such.  */
        !           287: 
        !           288: /* fpa0 is also reserved so that it can be used to move shit back and
        !           289:    forth between high fpa regs and everything else. */
        !           290: 
        !           291: #define FIXED_REGISTERS        \
        !           292:  {/* Data registers.  */       \
        !           293:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           294:                                \
        !           295:   /* Address registers.  */    \
        !           296:   0, 0, 0, 0, 0, 0, 0, 1,      \
        !           297:                                \
        !           298:   /* Floating point registers  \
        !           299:      (if available).  */       \
        !           300:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           301:                                \
        !           302:   /* Sun3 FPA registers.  */   \
        !           303:   1, 0, 0, 0, 0, 0, 0, 0,      \
        !           304:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           305:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           306:   0, 0, 0, 0, 0, 0, 0, 0 }
        !           307: 
        !           308: /* 1 for registers not available across function calls.
        !           309:    These must include the FIXED_REGISTERS and also any
        !           310:    registers that can be used without being saved.
        !           311:    The latter must include the registers where values are returned
        !           312:    and the register where structure-value addresses are passed.
        !           313:    Aside from that, you can include as many other registers as you like.  */
        !           314: #define CALL_USED_REGISTERS \
        !           315:  {1, 1, 0, 0, 0, 0, 0, 0, \
        !           316:   1, 1, 0, 0, 0, 0, 0, 1, \
        !           317:   1, 1, 0, 0, 0, 0, 0, 0, \
        !           318:   /* FPA registers.  */   \
        !           319:   1, 1, 1, 1, 0, 0, 0, 0, \
        !           320:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           321:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           322:   0, 0, 0, 0, 0, 0, 0, 0  }
        !           323: 
        !           324: #endif /* defined SUPPORT_SUN_FPA */
        !           325: 
        !           326: 
        !           327: /* Make sure everything's fine if we *don't* have a given processor.
        !           328:    This assumes that putting a register in fixed_regs will keep the
        !           329:    compiler's mitts completely off it.  We don't bother to zero it out
        !           330:    of register classes.  If neither TARGET_FPA or TARGET_68881 is set,
        !           331:    the compiler won't touch since no instructions that use these
        !           332:    registers will be valid.  
        !           333: 
        !           334:    Reserve PIC_OFFSET_TABLE_REGNUM (a5) for doing PIC relocation if
        !           335:    position independent code is being generated by making it a 
        !           336:    fixed register */
        !           337: 
        !           338: #ifndef SUPPORT_SUN_FPA
        !           339: 
        !           340: #define CONDITIONAL_REGISTER_USAGE \
        !           341: {                                               \
        !           342:   if (flag_pic)                                 \
        !           343:     fixed_regs[PIC_OFFSET_TABLE_REGNUM] = 1;    \
        !           344: }
        !           345: 
        !           346: #else /* defined SUPPORT_SUN_FPA */
        !           347: 
        !           348: #define CONDITIONAL_REGISTER_USAGE \
        !           349: {                                              \
        !           350:   int i;                                       \
        !           351:   HARD_REG_SET x;                              \
        !           352:   if (!TARGET_FPA)                             \
        !           353:     {                                          \
        !           354:       COPY_HARD_REG_SET (x, reg_class_contents[(int)FPA_REGS]); \
        !           355:       for (i = 0; i < FIRST_PSEUDO_REGISTER; i++ ) \
        !           356:        if (TEST_HARD_REG_BIT (x, i))           \
        !           357:        fixed_regs[i] = call_used_regs[i] = 1;  \
        !           358:     }                                          \
        !           359:   if (TARGET_FPA)                              \
        !           360:     {                                          \
        !           361:       COPY_HARD_REG_SET (x, reg_class_contents[(int)FP_REGS]); \
        !           362:       for (i = 0; i < FIRST_PSEUDO_REGISTER; i++ ) \
        !           363:        if (TEST_HARD_REG_BIT (x, i))           \
        !           364:        fixed_regs[i] = call_used_regs[i] = 1;  \
        !           365:     }                                          \
        !           366:   if (flag_pic)                                 \
        !           367:     fixed_regs[PIC_OFFSET_TABLE_REGNUM] = 1;    \
        !           368: }
        !           369: 
        !           370: #endif /* defined SUPPORT_SUN_FPA */
        !           371: 
        !           372: /* Return number of consecutive hard regs needed starting at reg REGNO
        !           373:    to hold something of mode MODE.
        !           374:    This is ordinarily the length in words of a value of mode MODE
        !           375:    but can be less for certain modes in special long registers.
        !           376: 
        !           377:    On the 68000, ordinary registers hold 32 bits worth;
        !           378:    for the 68881 registers, a single register is always enough for
        !           379:    anything that can be stored in them at all.  */
        !           380: #define HARD_REGNO_NREGS(REGNO, MODE)   \
        !           381:   ((REGNO) >= 16 ? GET_MODE_NUNITS (MODE)      \
        !           382:    : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
        !           383: 
        !           384: #ifndef SUPPORT_SUN_FPA
        !           385: 
        !           386: /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
        !           387:    On the 68000, the cpu registers can hold any mode but the 68881 registers
        !           388:    can hold only SFmode or DFmode.  The 68881 registers can't hold anything
        !           389:    if 68881 use is disabled.  */
        !           390: 
        !           391: #define HARD_REGNO_MODE_OK(REGNO, MODE) \
        !           392:   (((REGNO) < 16)                                       \
        !           393:    || ((REGNO) < 24                                    \
        !           394:        && TARGET_68881                                  \
        !           395:        && (GET_MODE_CLASS (MODE) == MODE_FLOAT         \
        !           396:           || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT)))
        !           397: 
        !           398: #else /* defined SUPPORT_SUN_FPA */
        !           399: 
        !           400: /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
        !           401:    On the 68000, the cpu registers can hold any mode but the 68881 registers
        !           402:    can hold only SFmode or DFmode.  And the 68881 registers can't hold anything
        !           403:    if 68881 use is disabled.  However, the Sun FPA register can
        !           404:    (apparently) hold whatever you feel like putting in them.
        !           405:    If using the fpa, don't put a double in d7/a0.  */
        !           406: 
        !           407: #define HARD_REGNO_MODE_OK(REGNO, MODE) \
        !           408: (((REGNO) < 16                                                         \
        !           409:   && !(TARGET_FPA                                                      \
        !           410:        && GET_MODE_CLASS ((MODE)) != MODE_INT                          \
        !           411:        && GET_MODE_UNIT_SIZE ((MODE)) > 4                              \
        !           412:        && (REGNO) < 8 && (REGNO) + GET_MODE_SIZE ((MODE)) / 4 > 8      \
        !           413:        && (REGNO) % (GET_MODE_UNIT_SIZE ((MODE)) / 4) != 0))           \
        !           414:  || ((REGNO) < 24                                                      \
        !           415:      ? TARGET_68881 && (GET_MODE_CLASS (MODE) == MODE_FLOAT            \
        !           416:                        || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) \
        !           417:      : ((REGNO) < 56 ? TARGET_FPA : 0)))
        !           418: 
        !           419: #endif /* defined SUPPORT_SUN_FPA */
        !           420: 
        !           421: /* Value is 1 if it is a good idea to tie two pseudo registers
        !           422:    when one has mode MODE1 and one has mode MODE2.
        !           423:    If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
        !           424:    for any hard reg, then this must be 0 for correct output.  */
        !           425: #define MODES_TIEABLE_P(MODE1, MODE2)                  \
        !           426:   (! TARGET_68881                                      \
        !           427:    || ((GET_MODE_CLASS (MODE1) == MODE_FLOAT           \
        !           428:        || GET_MODE_CLASS (MODE1) == MODE_COMPLEX_FLOAT)        \
        !           429:        == (GET_MODE_CLASS (MODE2) == MODE_FLOAT                \
        !           430:           || GET_MODE_CLASS (MODE2) == MODE_COMPLEX_FLOAT)))
        !           431: 
        !           432: /* Specify the registers used for certain standard purposes.
        !           433:    The values of these macros are register numbers.  */
        !           434: 
        !           435: /* m68000 pc isn't overloaded on a register.  */
        !           436: /* #define PC_REGNUM  */
        !           437: 
        !           438: /* Register to use for pushing function arguments.  */
        !           439: #define STACK_POINTER_REGNUM 15
        !           440: 
        !           441: /* Base register for access to local variables of the function.  */
        !           442: #define FRAME_POINTER_REGNUM 14
        !           443: 
        !           444: /* Value should be nonzero if functions must have frame pointers.
        !           445:    Zero means the frame pointer need not be set up (and parms
        !           446:    may be accessed via the stack pointer) in functions that seem suitable.
        !           447:    This is computed in `reload', in reload1.c.  */
        !           448: #define FRAME_POINTER_REQUIRED 0
        !           449: 
        !           450: /* Base register for access to arguments of the function.  */
        !           451: #define ARG_POINTER_REGNUM 14
        !           452: 
        !           453: /* Register in which static-chain is passed to a function.  */
        !           454: #define STATIC_CHAIN_REGNUM 8
        !           455: 
        !           456: /* Register in which address to store a structure value
        !           457:    is passed to a function.  */
        !           458: #define STRUCT_VALUE_REGNUM 9
        !           459: 
        !           460: /* Define the classes of registers for register constraints in the
        !           461:    machine description.  Also define ranges of constants.
        !           462: 
        !           463:    One of the classes must always be named ALL_REGS and include all hard regs.
        !           464:    If there is more than one class, another class must be named NO_REGS
        !           465:    and contain no registers.
        !           466: 
        !           467:    The name GENERAL_REGS must be the name of a class (or an alias for
        !           468:    another name such as ALL_REGS).  This is the class of registers
        !           469:    that is allowed by "g" or "r" in a register constraint.
        !           470:    Also, registers outside this class are allocated only when
        !           471:    instructions express preferences for them.
        !           472: 
        !           473:    The classes must be numbered in nondecreasing order; that is,
        !           474:    a larger-numbered class must never be contained completely
        !           475:    in a smaller-numbered class.
        !           476: 
        !           477:    For any two classes, it is very desirable that there be another
        !           478:    class that represents their union.  */
        !           479: 
        !           480: /* The 68000 has three kinds of registers, so eight classes would be
        !           481:    a complete set.  One of them is not needed.  */
        !           482: 
        !           483: #ifndef SUPPORT_SUN_FPA
        !           484: 
        !           485: enum reg_class {
        !           486:   NO_REGS, DATA_REGS,
        !           487:   ADDR_REGS, FP_REGS,
        !           488:   GENERAL_REGS, DATA_OR_FP_REGS,
        !           489:   ADDR_OR_FP_REGS, ALL_REGS,
        !           490:   LIM_REG_CLASSES };
        !           491: 
        !           492: #define N_REG_CLASSES (int) LIM_REG_CLASSES
        !           493: 
        !           494: /* Give names of register classes as strings for dump file.   */
        !           495: 
        !           496: #define REG_CLASS_NAMES \
        !           497:  { "NO_REGS", "DATA_REGS",              \
        !           498:    "ADDR_REGS", "FP_REGS",              \
        !           499:    "GENERAL_REGS", "DATA_OR_FP_REGS",   \
        !           500:    "ADDR_OR_FP_REGS", "ALL_REGS" }
        !           501: 
        !           502: /* Define which registers fit in which classes.
        !           503:    This is an initializer for a vector of HARD_REG_SET
        !           504:    of length N_REG_CLASSES.  */
        !           505: 
        !           506: #define REG_CLASS_CONTENTS \
        !           507: {                                      \
        !           508:  0x00000000,           /* NO_REGS */           \
        !           509:  0x000000ff,   /* DATA_REGS */         \
        !           510:  0x0000ff00,   /* ADDR_REGS */         \
        !           511:  0x00ff0000,   /* FP_REGS */           \
        !           512:  0x0000ffff,   /* GENERAL_REGS */      \
        !           513:  0x00ff00ff,   /* DATA_OR_FP_REGS */   \
        !           514:  0x00ffff00,    /* ADDR_OR_FP_REGS */   \
        !           515:  0x00ffffff,   /* ALL_REGS */          \
        !           516: }
        !           517: 
        !           518: /* The same information, inverted:
        !           519:    Return the class number of the smallest class containing
        !           520:    reg number REGNO.  This could be a conditional expression
        !           521:    or could index an array.  */
        !           522: 
        !           523: #define REGNO_REG_CLASS(REGNO) (((REGNO)>>3)+1)
        !           524: 
        !           525: #else /* defined SUPPORT_SUN_FPA */
        !           526: 
        !           527: /*
        !           528:  * Notes on final choices:
        !           529:  *
        !           530:  *   1) Didn't feel any need to union-ize LOW_FPA_REGS with anything
        !           531:  * else.
        !           532:  *   2) Removed all unions that involve address registers with
        !           533:  * floating point registers (left in unions of address and data with
        !           534:  * floating point).
        !           535:  *   3) Defined GENERAL_REGS as ADDR_OR_DATA_REGS.
        !           536:  *   4) Defined ALL_REGS as FPA_OR_FP_OR_GENERAL_REGS.
        !           537:  *   4) Left in everything else.
        !           538:  */
        !           539: enum reg_class { NO_REGS, LO_FPA_REGS, FPA_REGS, FP_REGS,
        !           540:   FP_OR_FPA_REGS, DATA_REGS, DATA_OR_FPA_REGS, DATA_OR_FP_REGS,
        !           541:   DATA_OR_FP_OR_FPA_REGS, ADDR_REGS, GENERAL_REGS,
        !           542:   GENERAL_OR_FPA_REGS, GENERAL_OR_FP_REGS, ALL_REGS,
        !           543:   LIM_REG_CLASSES };
        !           544: 
        !           545: #define N_REG_CLASSES (int) LIM_REG_CLASSES
        !           546: 
        !           547: /* Give names of register classes as strings for dump file.   */
        !           548: 
        !           549: #define REG_CLASS_NAMES \
        !           550:  { "NO_REGS", "LO_FPA_REGS", "FPA_REGS", "FP_REGS",  \
        !           551:    "FP_OR_FPA_REGS", "DATA_REGS", "DATA_OR_FPA_REGS", "DATA_OR_FP_REGS",  \
        !           552:    "DATA_OR_FP_OR_FPA_REGS", "ADDR_REGS", "GENERAL_REGS",  \
        !           553:    "GENERAL_OR_FPA_REGS", "GENERAL_OR_FP_REGS", "ALL_REGS" }
        !           554: 
        !           555: /* Define which registers fit in which classes.
        !           556:    This is an initializer for a vector of HARD_REG_SET
        !           557:    of length N_REG_CLASSES.  */
        !           558: 
        !           559: #define REG_CLASS_CONTENTS \
        !           560: {                                                      \
        !           561:  {0, 0},                       /* NO_REGS */           \
        !           562:  {0xff000000, 0x000000ff},     /* LO_FPA_REGS */       \
        !           563:  {0xff000000, 0x00ffffff},     /* FPA_REGS */          \
        !           564:  {0x00ff0000, 0x00000000},     /* FP_REGS */           \
        !           565:  {0xffff0000, 0x00ffffff},     /* FP_OR_FPA_REGS */    \
        !           566:  {0x000000ff, 0x00000000},     /* DATA_REGS */         \
        !           567:  {0xff0000ff, 0x00ffffff},     /* DATA_OR_FPA_REGS */  \
        !           568:  {0x00ff00ff, 0x00000000},     /* DATA_OR_FP_REGS */   \
        !           569:  {0xffff00ff, 0x00ffffff},     /* DATA_OR_FP_OR_FPA_REGS */\
        !           570:  {0x0000ff00, 0x00000000},     /* ADDR_REGS */         \
        !           571:  {0x0000ffff, 0x00000000},     /* GENERAL_REGS */      \
        !           572:  {0xff00ffff, 0x00ffffff},     /* GENERAL_OR_FPA_REGS */\
        !           573:  {0x00ffffff, 0x00000000},     /* GENERAL_OR_FP_REGS */\
        !           574:  {0xffffffff, 0x00ffffff},     /* ALL_REGS */          \
        !           575: }
        !           576: 
        !           577: /* The same information, inverted:
        !           578:    Return the class number of the smallest class containing
        !           579:    reg number REGNO.  This could be a conditional expression
        !           580:    or could index an array.  */
        !           581: 
        !           582: extern enum reg_class regno_reg_class[];
        !           583: #define REGNO_REG_CLASS(REGNO) (regno_reg_class[(REGNO)>>3])
        !           584: 
        !           585: #endif /* SUPPORT_SUN_FPA */
        !           586: 
        !           587: /* The class value for index registers, and the one for base regs.  */
        !           588: 
        !           589: #define INDEX_REG_CLASS GENERAL_REGS
        !           590: #define BASE_REG_CLASS ADDR_REGS
        !           591: 
        !           592: /* Get reg_class from a letter such as appears in the machine description.
        !           593:    We do a trick here to modify the effective constraints on the
        !           594:    machine description; we zorch the constraint letters that aren't
        !           595:    appropriate for a specific target.  This allows us to guarantee
        !           596:    that a specific kind of register will not be used for a given target
        !           597:    without fiddling with the register classes above. */
        !           598: 
        !           599: #ifndef SUPPORT_SUN_FPA
        !           600: 
        !           601: #define REG_CLASS_FROM_LETTER(C) \
        !           602:   ((C) == 'a' ? ADDR_REGS :                    \
        !           603:    ((C) == 'd' ? DATA_REGS :                   \
        !           604:     ((C) == 'f' ? (TARGET_68881 ? FP_REGS :    \
        !           605:                   NO_REGS) :                   \
        !           606:      NO_REGS)))
        !           607: 
        !           608: #else /* defined SUPPORT_SUN_FPA */
        !           609: 
        !           610: #define REG_CLASS_FROM_LETTER(C) \
        !           611:   ((C) == 'a' ? ADDR_REGS :                    \
        !           612:    ((C) == 'd' ? DATA_REGS :                   \
        !           613:     ((C) == 'f' ? (TARGET_68881 ? FP_REGS :    \
        !           614:                   NO_REGS) :                   \
        !           615:      ((C) == 'x' ? (TARGET_FPA ? FPA_REGS :    \
        !           616:                    NO_REGS) :                  \
        !           617:       ((C) == 'y' ? (TARGET_FPA ? LO_FPA_REGS :        \
        !           618:                     NO_REGS) :                 \
        !           619:        NO_REGS)))))
        !           620: 
        !           621: #endif /* defined SUPPORT_SUN_FPA */
        !           622: 
        !           623: /* The letters I, J, K, L and M in a register constraint string
        !           624:    can be used to stand for particular ranges of immediate operands.
        !           625:    This macro defines what the ranges are.
        !           626:    C is the letter, and VALUE is a constant value.
        !           627:    Return 1 if VALUE is in the range specified by C.
        !           628: 
        !           629:    For the 68000, `I' is used for the range 1 to 8
        !           630:    allowed as immediate shift counts and in addq.
        !           631:    `J' is used for the range of signed numbers that fit in 16 bits.
        !           632:    `K' is for numbers that moveq can't handle.
        !           633:    `L' is for range -8 to -1, range of values that can be added with subq.  */
        !           634: 
        !           635: #define CONST_OK_FOR_LETTER_P(VALUE, C)  \
        !           636:   ((C) == 'I' ? (VALUE) > 0 && (VALUE) <= 8 :    \
        !           637:    (C) == 'J' ? (VALUE) >= -0x8000 && (VALUE) <= 0x7FFF :      \
        !           638:    (C) == 'K' ? (VALUE) < -0x80 || (VALUE) >= 0x80 :   \
        !           639:    (C) == 'L' ? (VALUE) < 0 && (VALUE) >= -8 : 0)
        !           640: 
        !           641: /*
        !           642:  * A small bit of explanation:
        !           643:  * "G" defines all of the floating constants that are *NOT* 68881
        !           644:  * constants.  this is so 68881 constants get reloaded and the
        !           645:  * fpmovecr is used.  "H" defines *only* the class of constants that
        !           646:  * the fpa can use, because these can be gotten at in any fpa
        !           647:  * instruction and there is no need to force reloads.
        !           648:  */
        !           649: #ifndef SUPPORT_SUN_FPA
        !           650: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)  \
        !           651:   ((C) == 'G' ? ! (TARGET_68881 && standard_68881_constant_p (VALUE)) : 0 )
        !           652: #else /* defined SUPPORT_SUN_FPA */
        !           653: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)  \
        !           654:   ((C) == 'G' ? ! (TARGET_68881 && standard_68881_constant_p (VALUE)) : \
        !           655:    (C) == 'H' ? (TARGET_FPA && standard_sun_fpa_constant_p (VALUE)) : 0)
        !           656: #endif /* defined SUPPORT_SUN_FPA */
        !           657: 
        !           658: /* Given an rtx X being reloaded into a reg required to be
        !           659:    in class CLASS, return the class of reg to actually use.
        !           660:    In general this is just CLASS; but on some machines
        !           661:    in some cases it is preferable to use a more restrictive class.
        !           662:    On the 68000 series, use a data reg if possible when the
        !           663:    value is a constant in the range where moveq could be used
        !           664:    and we ensure that QImodes are reloaded into data regs.
        !           665:    Also, if a floating constant needs reloading, put it in memory
        !           666:    if possible.  */
        !           667: 
        !           668: #define PREFERRED_RELOAD_CLASS(X,CLASS)  \
        !           669:   ((GET_CODE (X) == CONST_INT                  \
        !           670:     && (unsigned) (INTVAL (X) + 0x80) < 0x100  \
        !           671:     && (CLASS) != ADDR_REGS)                   \
        !           672:    ? DATA_REGS                                 \
        !           673:    : (GET_MODE (X) == QImode && (CLASS) != ADDR_REGS) \
        !           674:    ? DATA_REGS                                 \
        !           675:    : (GET_CODE (X) == CONST_DOUBLE             \
        !           676:       && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT) \
        !           677:    ? NO_REGS                                   \
        !           678:    : (CLASS))
        !           679: 
        !           680: /* Return the maximum number of consecutive registers
        !           681:    needed to represent mode MODE in a register of class CLASS.  */
        !           682: /* On the 68000, this is the size of MODE in words,
        !           683:    except in the FP regs, where a single reg is always enough.  */
        !           684: #ifndef SUPPORT_SUN_FPA
        !           685: 
        !           686: #define CLASS_MAX_NREGS(CLASS, MODE)   \
        !           687:  ((CLASS) == FP_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: #define REGISTER_MOVE_COST(CLASS1, CLASS2)             \
        !           692:   (((CLASS1) == FP_REGS && (CLASS2) != FP_REGS)                \
        !           693:     || ((CLASS2) == FP_REGS && (CLASS1) != FP_REGS)    \
        !           694:     ? 4 : 2)
        !           695: 
        !           696: #else /* defined SUPPORT_SUN_FPA */
        !           697: 
        !           698: #define CLASS_MAX_NREGS(CLASS, MODE)   \
        !           699:  ((CLASS) == FP_REGS || (CLASS) == FPA_REGS || (CLASS) == LO_FPA_REGS ? 1 \
        !           700:   : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
        !           701: 
        !           702: /* Moves between fp regs and other regs are two insns.  */
        !           703: /* Likewise for high fpa regs and other regs.  */
        !           704: #define REGISTER_MOVE_COST(CLASS1, CLASS2)             \
        !           705:   ((((CLASS1) == FP_REGS && (CLASS2) != FP_REGS)       \
        !           706:     || ((CLASS2) == FP_REGS && (CLASS1) != FP_REGS)    \
        !           707:     || ((CLASS1) == FPA_REGS && (CLASS2) != FPA_REGS)  \
        !           708:     || ((CLASS2) == FPA_REGS && (CLASS1) != FPA_REGS)) \
        !           709:    ? 4 : 2)
        !           710: 
        !           711: #endif /* define SUPPORT_SUN_FPA */
        !           712: 
        !           713: /* Stack layout; function entry, exit and calling.  */
        !           714: 
        !           715: /* Define this if pushing a word on the stack
        !           716:    makes the stack pointer a smaller address.  */
        !           717: #define STACK_GROWS_DOWNWARD
        !           718: 
        !           719: /* Nonzero if we need to generate stack-probe insns.
        !           720:    On most systems they are not needed.
        !           721:    When they are needed, define this as the stack offset to probe at.  */
        !           722: #define NEED_PROBE 0
        !           723: 
        !           724: /* Define this if the nominal address of the stack frame
        !           725:    is at the high-address end of the local variables;
        !           726:    that is, each additional local variable allocated
        !           727:    goes at a more negative offset in the frame.  */
        !           728: #define FRAME_GROWS_DOWNWARD
        !           729: 
        !           730: /* Offset within stack frame to start allocating local variables at.
        !           731:    If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
        !           732:    first local allocated.  Otherwise, it is the offset to the BEGINNING
        !           733:    of the first local allocated.  */
        !           734: #define STARTING_FRAME_OFFSET 0
        !           735: 
        !           736: /* If we generate an insn to push BYTES bytes,
        !           737:    this says how many the stack pointer really advances by.
        !           738:    On the 68000, sp@- in a byte insn really pushes a word.  */
        !           739: #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1)
        !           740: 
        !           741: /* Offset of first parameter from the argument pointer register value.  */
        !           742: #define FIRST_PARM_OFFSET(FNDECL) 8
        !           743: 
        !           744: /* Value is the number of byte of arguments automatically
        !           745:    popped when returning from a subroutine call.
        !           746:    FUNTYPE is the data type of the function (as a tree),
        !           747:    or for a library call it is an identifier node for the subroutine name.
        !           748:    SIZE is the number of bytes of arguments passed on the stack.
        !           749: 
        !           750:    On the 68000, the RTS insn cannot pop anything.
        !           751:    On the 68010, the RTD insn may be used to pop them if the number
        !           752:      of args is fixed, but if the number is variable then the caller
        !           753:      must pop them all.  RTD can't be used for library calls now
        !           754:      because the library is compiled with the Unix compiler.
        !           755:    Use of RTD is a selectable option, since it is incompatible with
        !           756:    standard Unix calling sequences.  If the option is not selected,
        !           757:    the caller must always pop the args.  */
        !           758: 
        !           759: #define RETURN_POPS_ARGS(FUNTYPE,SIZE)   \
        !           760:   ((TARGET_RTD && TREE_CODE (FUNTYPE) != IDENTIFIER_NODE       \
        !           761:     && (TYPE_ARG_TYPES (FUNTYPE) == 0                          \
        !           762:        || (TREE_VALUE (tree_last (TYPE_ARG_TYPES (FUNTYPE)))   \
        !           763:            == void_type_node)))                                \
        !           764:    ? (SIZE) : 0)
        !           765: 
        !           766: /* Define how to find the value returned by a function.
        !           767:    VALTYPE is the data type of the value (as a tree).
        !           768:    If the precise function being called is known, FUNC is its FUNCTION_DECL;
        !           769:    otherwise, FUNC is 0.  */
        !           770: 
        !           771: /* On the 68000 the return value is in D0 regardless.  */
        !           772: 
        !           773: #define FUNCTION_VALUE(VALTYPE, FUNC)  \
        !           774:   gen_rtx (REG, TYPE_MODE (VALTYPE), 0)
        !           775: 
        !           776: /* Define how to find the value returned by a library function
        !           777:    assuming the value has mode MODE.  */
        !           778: 
        !           779: /* On the 68000 the return value is in D0 regardless.  */
        !           780: 
        !           781: #define LIBCALL_VALUE(MODE)  gen_rtx (REG, MODE, 0)
        !           782: 
        !           783: /* 1 if N is a possible register number for a function value.
        !           784:    On the 68000, d0 is the only register thus used.  */
        !           785: 
        !           786: #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
        !           787: 
        !           788: /* Define this to be true when FUNCTION_VALUE_REGNO_P is true for
        !           789:    more than one register.  */
        !           790: 
        !           791: #define NEEDS_UNTYPED_CALL 0
        !           792: 
        !           793: /* Define this if PCC uses the nonreentrant convention for returning
        !           794:    structure and union values.  */
        !           795: 
        !           796: #define PCC_STATIC_STRUCT_RETURN
        !           797: 
        !           798: /* 1 if N is a possible register number for function argument passing.
        !           799:    On the 68000, no registers are used in this way.  */
        !           800: 
        !           801: #define FUNCTION_ARG_REGNO_P(N) 0
        !           802: 
        !           803: /* Define a data type for recording info about an argument list
        !           804:    during the scan of that argument list.  This data type should
        !           805:    hold all necessary information about the function itself
        !           806:    and about the args processed so far, enough to enable macros
        !           807:    such as FUNCTION_ARG to determine where the next arg should go.
        !           808: 
        !           809:    On the m68k, this is a single integer, which is a number of bytes
        !           810:    of arguments scanned so far.  */
        !           811: 
        !           812: #define CUMULATIVE_ARGS int
        !           813: 
        !           814: /* Initialize a variable CUM of type CUMULATIVE_ARGS
        !           815:    for a call to a function whose data type is FNTYPE.
        !           816:    For a library call, FNTYPE is 0.
        !           817: 
        !           818:    On the m68k, the offset starts at 0.  */
        !           819: 
        !           820: #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME)       \
        !           821:  ((CUM) = 0)
        !           822: 
        !           823: /* Update the data in CUM to advance over an argument
        !           824:    of mode MODE and data type TYPE.
        !           825:    (TYPE is null for libcalls where that information may not be available.)  */
        !           826: 
        !           827: #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)   \
        !           828:  ((CUM) += ((MODE) != BLKmode                  \
        !           829:            ? (GET_MODE_SIZE (MODE) + 3) & ~3   \
        !           830:            : (int_size_in_bytes (TYPE) + 3) & ~3))
        !           831: 
        !           832: /* Define where to put the arguments to a function.
        !           833:    Value is zero to push the argument on the stack,
        !           834:    or a hard register in which to store the argument.
        !           835: 
        !           836:    MODE is the argument's machine mode.
        !           837:    TYPE is the data type of the argument (as a tree).
        !           838:     This is null for libcalls where that information may
        !           839:     not be available.
        !           840:    CUM is a variable of type CUMULATIVE_ARGS which gives info about
        !           841:     the preceding args and about the function being called.
        !           842:    NAMED is nonzero if this argument is a named parameter
        !           843:     (otherwise it is an extra parameter matching an ellipsis).  */
        !           844: 
        !           845: /* On the 68000 all args are pushed, except if -mregparm is specified
        !           846:    then the first two words of arguments are passed in d0, d1.
        !           847:    *NOTE* -mregparm does not work.
        !           848:    It exists only to test register calling conventions.  */
        !           849: 
        !           850: #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
        !           851: ((TARGET_REGPARM && (CUM) < 8) ? gen_rtx (REG, (MODE), (CUM) / 4) : 0)
        !           852: 
        !           853: /* For an arg passed partly in registers and partly in memory,
        !           854:    this is the number of registers used.
        !           855:    For args passed entirely in registers or entirely in memory, zero.  */
        !           856: 
        !           857: #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
        !           858: ((TARGET_REGPARM && (CUM) < 8                                  \
        !           859:   && 8 < ((CUM) + ((MODE) == BLKmode                           \
        !           860:                      ? int_size_in_bytes (TYPE)                \
        !           861:                      : GET_MODE_SIZE (MODE))))                 \
        !           862:  ? 2 - (CUM) / 4 : 0)
        !           863: 
        !           864: /* Generate the assembly code for function entry. */
        !           865: #define FUNCTION_PROLOGUE(FILE, SIZE) output_function_prologue(FILE, SIZE)
        !           866: 
        !           867: /* Output assembler code to FILE to increment profiler label # LABELNO
        !           868:    for profiling a function entry.  */
        !           869: 
        !           870: #define FUNCTION_PROFILER(FILE, LABELNO)  \
        !           871:   asm_fprintf (FILE, "\tlea %LLP%d,%Ra0\n\tjsr mcount\n", (LABELNO))
        !           872: 
        !           873: /* Output assembler code to FILE to initialize this source file's
        !           874:    basic block profiling info, if that has not already been done.  */
        !           875: 
        !           876: #define FUNCTION_BLOCK_PROFILER(FILE, LABELNO)  \
        !           877:   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",  \
        !           878:           LABELNO, LABELNO);
        !           879: 
        !           880: /* Output assembler code to FILE to increment the entry-count for
        !           881:    the BLOCKNO'th basic block in this source file.  */
        !           882: 
        !           883: #define BLOCK_PROFILER(FILE, BLOCKNO)  \
        !           884:   asm_fprintf (FILE, "\taddql %I1,%LLPBX2+%d\n", 4 * BLOCKNO)
        !           885: 
        !           886: /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
        !           887:    the stack pointer does not matter.  The value is tested only in
        !           888:    functions that have frame pointers.
        !           889:    No definition is equivalent to always zero.  */
        !           890: 
        !           891: #define EXIT_IGNORE_STACK 1
        !           892: 
        !           893: /* Generate the assembly code for function exit. */
        !           894: #define FUNCTION_EPILOGUE(FILE, SIZE) output_function_epilogue (FILE, SIZE)
        !           895:   
        !           896: /* This is a hook for other tm files to change.  */
        !           897: /* #define FUNCTION_EXTRA_EPILOGUE(FILE, SIZE) */
        !           898: 
        !           899: /* Determine if the epilogue should be output as RTL.
        !           900:    You should override this if you define FUNCTION_EXTRA_EPILOGUE.  */
        !           901: #define USE_RETURN_INSN use_return_insn ()
        !           902: 
        !           903: /* Store in the variable DEPTH the initial difference between the
        !           904:    frame pointer reg contents and the stack pointer reg contents,
        !           905:    as of the start of the function body.  This depends on the layout
        !           906:    of the fixed parts of the stack frame and on how registers are saved.
        !           907: 
        !           908:    On the 68k, if we have a frame, we must add one word to its length
        !           909:    to allow for the place that a6 is stored when we do have a frame pointer.
        !           910:    Otherwise, we would need to compute the offset from the frame pointer
        !           911:    of a local variable as a function of frame_pointer_needed, which
        !           912:    is hard.  */
        !           913: 
        !           914: #define INITIAL_FRAME_POINTER_OFFSET(DEPTH)                    \
        !           915: { int regno;                                                   \
        !           916:   int offset = -4;                                             \
        !           917:   for (regno = 16; regno < FIRST_PSEUDO_REGISTER; regno++)     \
        !           918:     if (regs_ever_live[regno] && ! call_used_regs[regno])      \
        !           919:       offset += 12;                                            \
        !           920:   for (regno = 0; regno < 16; regno++)                         \
        !           921:     if (regs_ever_live[regno] && ! call_used_regs[regno])      \
        !           922:       offset += 4;                                             \
        !           923:   (DEPTH) = (offset + ((get_frame_size () + 3) & -4)           \
        !           924:             + (get_frame_size () == 0 ? 0 : 4));               \
        !           925: }
        !           926: 
        !           927: /* Output assembler code for a block containing the constant parts
        !           928:    of a trampoline, leaving space for the variable parts.  */
        !           929: 
        !           930: /* On the 68k, the trampoline looks like this:
        !           931:      mov  @#.,a0
        !           932:      jsr  @#___trampoline
        !           933:      jsr  @#___trampoline
        !           934:      .long STATIC
        !           935:      .long FUNCTION
        !           936: The reason for having three jsr insns is so that an entire line
        !           937: of the instruction cache is filled in a predictable way
        !           938: that will always be the same.
        !           939: 
        !           940: We always use the assembler label ___trampoline
        !           941: regardless of whether the system adds underscores.  */
        !           942: 
        !           943: #define TRAMPOLINE_TEMPLATE(FILE)                                      \
        !           944: {                                                                      \
        !           945:   ASM_OUTPUT_SHORT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x207c));      \
        !           946:   ASM_OUTPUT_SHORT (FILE, const0_rtx);                                 \
        !           947:   ASM_OUTPUT_SHORT (FILE, const0_rtx);                                 \
        !           948:   ASM_OUTPUT_SHORT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x4eb9));      \
        !           949:   ASM_OUTPUT_INT (FILE, gen_rtx (SYMBOL_REF, SImode, "*___trampoline"));\
        !           950:   ASM_OUTPUT_SHORT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x4eb9));      \
        !           951:   ASM_OUTPUT_INT (FILE, gen_rtx (SYMBOL_REF, SImode, "*___trampoline"));\
        !           952:   ASM_OUTPUT_SHORT (FILE, const0_rtx);                                 \
        !           953:   ASM_OUTPUT_SHORT (FILE, const0_rtx);                                 \
        !           954:   ASM_OUTPUT_SHORT (FILE, const0_rtx);                                 \
        !           955:   ASM_OUTPUT_SHORT (FILE, const0_rtx);                                 \
        !           956: }
        !           957: 
        !           958: /* Length in units of the trampoline for entering a nested function.  */
        !           959: 
        !           960: #define TRAMPOLINE_SIZE 26
        !           961: 
        !           962: /* Alignment required for a trampoline.  16 is used to find the
        !           963:    beginning of a line in the instruction cache.  */
        !           964: 
        !           965: #define TRAMPOLINE_ALIGN 16
        !           966: 
        !           967: /* Emit RTL insns to initialize the variable parts of a trampoline.
        !           968:    FNADDR is an RTX for the address of the function's pure code.
        !           969:    CXT is an RTX for the static chain value for the function.  */
        !           970: 
        !           971: #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)                      \
        !           972: {                                                                      \
        !           973:   emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 2)), TRAMP); \
        !           974:   emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 18)), CXT); \
        !           975:   emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 22)), FNADDR); \
        !           976: }
        !           977: 
        !           978: /* This is the library routine that is used
        !           979:    to transfer control from the trampoline
        !           980:    to the actual nested function.  */
        !           981: 
        !           982: /* A colon is used with no explicit operands
        !           983:    to cause the template string to be scanned for %-constructs.  */
        !           984: /* The function name __transfer_from_trampoline is not actually used.
        !           985:    The function definition just permits use of "asm with operands"
        !           986:    (though the operand list is empty).  */
        !           987: #define TRANSFER_FROM_TRAMPOLINE                               \
        !           988: void                                                           \
        !           989: __transfer_from_trampoline ()                                  \
        !           990: {                                                              \
        !           991:   register char *a0 asm ("%a0");                               \
        !           992:   asm (GLOBAL_ASM_OP " ___trampoline");                                \
        !           993:   asm ("___trampoline:");                                      \
        !           994:   asm volatile ("move%.l %0,%@" : : "m" (a0[22]));             \
        !           995:   asm volatile ("move%.l %1,%0" : "=a" (a0) : "m" (a0[18]));   \
        !           996:   asm ("rts":);                                                        \
        !           997: }
        !           998: 
        !           999: /* Addressing modes, and classification of registers for them.  */
        !          1000: 
        !          1001: #define HAVE_POST_INCREMENT
        !          1002: /* #define HAVE_POST_DECREMENT */
        !          1003: 
        !          1004: #define HAVE_PRE_DECREMENT
        !          1005: /* #define HAVE_PRE_INCREMENT */
        !          1006: 
        !          1007: /* Macros to check register numbers against specific register classes.  */
        !          1008: 
        !          1009: /* These assume that REGNO is a hard or pseudo reg number.
        !          1010:    They give nonzero only if REGNO is a hard reg of the suitable class
        !          1011:    or a pseudo reg currently allocated to a suitable hard reg.
        !          1012:    Since they use reg_renumber, they are safe only once reg_renumber
        !          1013:    has been allocated, which happens in local-alloc.c.  */
        !          1014: 
        !          1015: #define REGNO_OK_FOR_INDEX_P(REGNO) \
        !          1016: ((REGNO) < 16 || (unsigned) reg_renumber[REGNO] < 16)
        !          1017: #define REGNO_OK_FOR_BASE_P(REGNO) \
        !          1018: (((REGNO) ^ 010) < 8 || (unsigned) (reg_renumber[REGNO] ^ 010) < 8)
        !          1019: #define REGNO_OK_FOR_DATA_P(REGNO) \
        !          1020: ((REGNO) < 8 || (unsigned) reg_renumber[REGNO] < 8)
        !          1021: #define REGNO_OK_FOR_FP_P(REGNO) \
        !          1022: (((REGNO) ^ 020) < 8 || (unsigned) (reg_renumber[REGNO] ^ 020) < 8)
        !          1023: #ifdef SUPPORT_SUN_FPA
        !          1024: #define REGNO_OK_FOR_FPA_P(REGNO) \
        !          1025: (((REGNO) >= 24 && (REGNO) < 56) || (reg_renumber[REGNO] >= 24 && reg_renumber[REGNO] < 56))
        !          1026: #endif
        !          1027: 
        !          1028: /* Now macros that check whether X is a register and also,
        !          1029:    strictly, whether it is in a specified class.
        !          1030: 
        !          1031:    These macros are specific to the 68000, and may be used only
        !          1032:    in code for printing assembler insns and in conditions for
        !          1033:    define_optimization.  */
        !          1034: 
        !          1035: /* 1 if X is a data register.  */
        !          1036: 
        !          1037: #define DATA_REG_P(X) (REG_P (X) && REGNO_OK_FOR_DATA_P (REGNO (X)))
        !          1038: 
        !          1039: /* 1 if X is an fp register.  */
        !          1040: 
        !          1041: #define FP_REG_P(X) (REG_P (X) && REGNO_OK_FOR_FP_P (REGNO (X)))
        !          1042: 
        !          1043: /* 1 if X is an address register  */
        !          1044: 
        !          1045: #define ADDRESS_REG_P(X) (REG_P (X) && REGNO_OK_FOR_BASE_P (REGNO (X)))
        !          1046: 
        !          1047: #ifdef SUPPORT_SUN_FPA
        !          1048: /* 1 if X is a register in the Sun FPA.  */
        !          1049: #define FPA_REG_P(X) (REG_P (X) && REGNO_OK_FOR_FPA_P (REGNO (X)))
        !          1050: #else
        !          1051: /* Answer must be no if we don't have an FPA.  */
        !          1052: #define FPA_REG_P(X) 0
        !          1053: #endif
        !          1054: 
        !          1055: /* Maximum number of registers that can appear in a valid memory address.  */
        !          1056: 
        !          1057: #define MAX_REGS_PER_ADDRESS 2
        !          1058: 
        !          1059: /* Recognize any constant value that is a valid address.  */
        !          1060: 
        !          1061: #define CONSTANT_ADDRESS_P(X)   \
        !          1062:   (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF             \
        !          1063:    || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST               \
        !          1064:    || GET_CODE (X) == HIGH)
        !          1065: 
        !          1066: /* Nonzero if the constant value X is a legitimate general operand.
        !          1067:    It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.  */
        !          1068: 
        !          1069: #define LEGITIMATE_CONSTANT_P(X) 1
        !          1070: 
        !          1071: /* Nonzero if the constant value X is a legitimate general operand
        !          1072:    when generating PIC code.  It is given that flag_pic is on and 
        !          1073:    that X satisfies CONSTANT_P or is a CONST_DOUBLE.  */
        !          1074: 
        !          1075: #define LEGITIMATE_PIC_OPERAND_P(X)    \
        !          1076:   (! symbolic_operand (X, VOIDmode))
        !          1077: 
        !          1078: /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
        !          1079:    and check its validity for a certain class.
        !          1080:    We have two alternate definitions for each of them.
        !          1081:    The usual definition accepts all pseudo regs; the other rejects
        !          1082:    them unless they have been allocated suitable hard regs.
        !          1083:    The symbol REG_OK_STRICT causes the latter definition to be used.
        !          1084: 
        !          1085:    Most source files want to accept pseudo regs in the hope that
        !          1086:    they will get allocated to the class that the insn wants them to be in.
        !          1087:    Source files for reload pass need to be strict.
        !          1088:    After reload, it makes no difference, since pseudo regs have
        !          1089:    been eliminated by then.  */
        !          1090: 
        !          1091: #ifndef REG_OK_STRICT
        !          1092: 
        !          1093: /* Nonzero if X is a hard reg that can be used as an index
        !          1094:    or if it is a pseudo reg.  */
        !          1095: #define REG_OK_FOR_INDEX_P(X) ((REGNO (X) ^ 020) >= 8)
        !          1096: /* Nonzero if X is a hard reg that can be used as a base reg
        !          1097:    or if it is a pseudo reg.  */
        !          1098: #define REG_OK_FOR_BASE_P(X) ((REGNO (X) & ~027) != 0)
        !          1099: 
        !          1100: #else
        !          1101: 
        !          1102: /* Nonzero if X is a hard reg that can be used as an index.  */
        !          1103: #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
        !          1104: /* Nonzero if X is a hard reg that can be used as a base reg.  */
        !          1105: #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
        !          1106: 
        !          1107: #endif
        !          1108: 
        !          1109: /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
        !          1110:    that is a valid memory address for an instruction.
        !          1111:    The MODE argument is the machine mode for the MEM expression
        !          1112:    that wants to use this address.
        !          1113: 
        !          1114:    When generating PIC, an address involving a SYMBOL_REF is legitimate
        !          1115:    if and only if it is the sum of pic_offset_table_rtx and the SYMBOL_REF.
        !          1116:    We use LEGITIMATE_PIC_OPERAND_P to throw out the illegitimate addresses,
        !          1117:    and we explicitly check for the sum of pic_offset_table_rtx and a SYMBOL_REF.
        !          1118: 
        !          1119:    Likewise for a LABEL_REF when generating PIC.
        !          1120: 
        !          1121:    The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS.  */
        !          1122: 
        !          1123: #define INDIRECTABLE_1_ADDRESS_P(X)  \
        !          1124:   ((CONSTANT_ADDRESS_P (X) && (!flag_pic || LEGITIMATE_PIC_OPERAND_P (X))) \
        !          1125:    || (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X))                   \
        !          1126:    || ((GET_CODE (X) == PRE_DEC || GET_CODE (X) == POST_INC)           \
        !          1127:        && REG_P (XEXP (X, 0))                                          \
        !          1128:        && REG_OK_FOR_BASE_P (XEXP (X, 0)))                             \
        !          1129:    || (GET_CODE (X) == PLUS                                            \
        !          1130:        && REG_P (XEXP (X, 0)) && REG_OK_FOR_BASE_P (XEXP (X, 0))       \
        !          1131:        && GET_CODE (XEXP (X, 1)) == CONST_INT                          \
        !          1132:        && ((unsigned) INTVAL (XEXP (X, 1)) + 0x8000) < 0x10000)                \
        !          1133:    || (GET_CODE (X) == PLUS && XEXP (X, 0) == pic_offset_table_rtx     \
        !          1134:        && flag_pic && GET_CODE (XEXP (X, 1)) == SYMBOL_REF)            \
        !          1135:    || (GET_CODE (X) == PLUS && XEXP (X, 0) == pic_offset_table_rtx     \
        !          1136:        && flag_pic && GET_CODE (XEXP (X, 1)) == LABEL_REF))            \
        !          1137: 
        !          1138: #if 0
        !          1139: /* This should replace the last two (non-pic) lines
        !          1140:    except that Sun's assembler does not seem to handle such operands.  */
        !          1141:        && (TARGET_68020 ? CONSTANT_ADDRESS_P (XEXP (X, 1))             \
        !          1142:           : (GET_CODE (XEXP (X, 1)) == CONST_INT                       \
        !          1143:              && ((unsigned) INTVAL (XEXP (X, 1)) + 0x8000) < 0x10000))))
        !          1144: #endif
        !          1145: 
        !          1146: 
        !          1147: #define GO_IF_NONINDEXED_ADDRESS(X, ADDR)  \
        !          1148: { if (INDIRECTABLE_1_ADDRESS_P (X)) goto ADDR; }
        !          1149: 
        !          1150: /* Only labels on dispatch tables are valid for indexing from.  */
        !          1151: #define GO_IF_INDEXABLE_BASE(X, ADDR)                          \
        !          1152: { rtx temp;                                                    \
        !          1153:   if (GET_CODE (X) == LABEL_REF                                        \
        !          1154:       && (temp = next_nonnote_insn (XEXP (X, 0))) != 0         \
        !          1155:       && GET_CODE (temp) == JUMP_INSN                          \
        !          1156:       && (GET_CODE (PATTERN (temp)) == ADDR_VEC                        \
        !          1157:          || GET_CODE (PATTERN (temp)) == ADDR_DIFF_VEC))       \
        !          1158:     goto ADDR;                                                 \
        !          1159:   if (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X)) goto ADDR; }
        !          1160: 
        !          1161: #define GO_IF_INDEXING(X, ADDR)        \
        !          1162: { if (GET_CODE (X) == PLUS && LEGITIMATE_INDEX_P (XEXP (X, 0)))                \
        !          1163:     { GO_IF_INDEXABLE_BASE (XEXP (X, 1), ADDR); }                      \
        !          1164:   if (GET_CODE (X) == PLUS && LEGITIMATE_INDEX_P (XEXP (X, 1)))                \
        !          1165:     { GO_IF_INDEXABLE_BASE (XEXP (X, 0), ADDR); } }
        !          1166: 
        !          1167: #define GO_IF_INDEXED_ADDRESS(X, ADDR)  \
        !          1168: { GO_IF_INDEXING (X, ADDR);                                            \
        !          1169:   if (GET_CODE (X) == PLUS)                                            \
        !          1170:     { if (GET_CODE (XEXP (X, 1)) == CONST_INT                          \
        !          1171:          && (unsigned) INTVAL (XEXP (X, 1)) + 0x80 < 0x100)            \
        !          1172:        { rtx go_temp = XEXP (X, 0); GO_IF_INDEXING (go_temp, ADDR); }  \
        !          1173:       if (GET_CODE (XEXP (X, 0)) == CONST_INT                          \
        !          1174:          && (unsigned) INTVAL (XEXP (X, 0)) + 0x80 < 0x100)            \
        !          1175:        { rtx go_temp = XEXP (X, 1); GO_IF_INDEXING (go_temp, ADDR); } } }
        !          1176: 
        !          1177: #define LEGITIMATE_INDEX_REG_P(X)   \
        !          1178:   ((GET_CODE (X) == REG && REG_OK_FOR_INDEX_P (X))     \
        !          1179:    || (GET_CODE (X) == SIGN_EXTEND                     \
        !          1180:        && GET_CODE (XEXP (X, 0)) == REG                        \
        !          1181:        && GET_MODE (XEXP (X, 0)) == HImode             \
        !          1182:        && REG_OK_FOR_INDEX_P (XEXP (X, 0))))
        !          1183: 
        !          1184: #define LEGITIMATE_INDEX_P(X)   \
        !          1185:    (LEGITIMATE_INDEX_REG_P (X)                         \
        !          1186:     || (TARGET_68020 && GET_CODE (X) == MULT           \
        !          1187:        && LEGITIMATE_INDEX_REG_P (XEXP (X, 0))         \
        !          1188:        && GET_CODE (XEXP (X, 1)) == CONST_INT          \
        !          1189:        && (INTVAL (XEXP (X, 1)) == 2                   \
        !          1190:            || INTVAL (XEXP (X, 1)) == 4                \
        !          1191:            || INTVAL (XEXP (X, 1)) == 8)))
        !          1192: 
        !          1193: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR)  \
        !          1194: { GO_IF_NONINDEXED_ADDRESS (X, ADDR);                  \
        !          1195:   GO_IF_INDEXED_ADDRESS (X, ADDR); }
        !          1196: 
        !          1197: /* Try machine-dependent ways of modifying an illegitimate address
        !          1198:    to be legitimate.  If we find one, return the new, valid address.
        !          1199:    This macro is used in only one place: `memory_address' in explow.c.
        !          1200: 
        !          1201:    OLDX is the address as it was before break_out_memory_refs was called.
        !          1202:    In some cases it is useful to look at this to decide what needs to be done.
        !          1203: 
        !          1204:    MODE and WIN are passed so that this macro can use
        !          1205:    GO_IF_LEGITIMATE_ADDRESS.
        !          1206: 
        !          1207:    It is always safe for this macro to do nothing.  It exists to recognize
        !          1208:    opportunities to optimize the output.
        !          1209: 
        !          1210:    For the 68000, we handle X+REG by loading X into a register R and
        !          1211:    using R+REG.  R will go in an address reg and indexing will be used.
        !          1212:    However, if REG is a broken-out memory address or multiplication,
        !          1213:    nothing needs to be done because REG can certainly go in an address reg.  */
        !          1214: 
        !          1215: #define COPY_ONCE(Y) if (!copied) { Y = copy_rtx (Y); copied = ch = 1; }
        !          1216: #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN)   \
        !          1217: { register int ch = (X) != (OLDX);                                     \
        !          1218:   if (GET_CODE (X) == PLUS)                                            \
        !          1219:     { int copied = 0;                                                  \
        !          1220:       if (GET_CODE (XEXP (X, 0)) == MULT)                              \
        !          1221:        { COPY_ONCE (X); XEXP (X, 0) = force_operand (XEXP (X, 0), 0);} \
        !          1222:       if (GET_CODE (XEXP (X, 1)) == MULT)                              \
        !          1223:        { COPY_ONCE (X); XEXP (X, 1) = force_operand (XEXP (X, 1), 0);} \
        !          1224:       if (ch && GET_CODE (XEXP (X, 1)) == REG                          \
        !          1225:          && GET_CODE (XEXP (X, 0)) == REG)                             \
        !          1226:        goto WIN;                                                       \
        !          1227:       if (ch) { GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN); }             \
        !          1228:       if (GET_CODE (XEXP (X, 0)) == REG                                        \
        !          1229:               || (GET_CODE (XEXP (X, 0)) == SIGN_EXTEND                \
        !          1230:                   && GET_CODE (XEXP (XEXP (X, 0), 0)) == REG           \
        !          1231:                   && GET_MODE (XEXP (XEXP (X, 0), 0)) == HImode))      \
        !          1232:        { register rtx temp = gen_reg_rtx (Pmode);                      \
        !          1233:          register rtx val = force_operand (XEXP (X, 1), 0);            \
        !          1234:          emit_move_insn (temp, val);                                   \
        !          1235:          COPY_ONCE (X);                                                \
        !          1236:          XEXP (X, 1) = temp;                                           \
        !          1237:          goto WIN; }                                                   \
        !          1238:       else if (GET_CODE (XEXP (X, 1)) == REG                           \
        !          1239:               || (GET_CODE (XEXP (X, 1)) == SIGN_EXTEND                \
        !          1240:                   && GET_CODE (XEXP (XEXP (X, 1), 0)) == REG           \
        !          1241:                   && GET_MODE (XEXP (XEXP (X, 1), 0)) == HImode))      \
        !          1242:        { register rtx temp = gen_reg_rtx (Pmode);                      \
        !          1243:          register rtx val = force_operand (XEXP (X, 0), 0);            \
        !          1244:          emit_move_insn (temp, val);                                   \
        !          1245:          COPY_ONCE (X);                                                \
        !          1246:          XEXP (X, 0) = temp;                                           \
        !          1247:          goto WIN; }}}
        !          1248: 
        !          1249: /* Go to LABEL if ADDR (a legitimate address expression)
        !          1250:    has an effect that depends on the machine mode it is used for.
        !          1251:    On the 68000, only predecrement and postincrement address depend thus
        !          1252:    (the amount of decrement or increment being the length of the operand).  */
        !          1253: 
        !          1254: #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)       \
        !          1255:  if (GET_CODE (ADDR) == POST_INC || GET_CODE (ADDR) == PRE_DEC) goto LABEL
        !          1256: 
        !          1257: /* Specify the machine mode that this machine uses
        !          1258:    for the index in the tablejump instruction.  */
        !          1259: #define CASE_VECTOR_MODE HImode
        !          1260: 
        !          1261: /* Define this if the tablejump instruction expects the table
        !          1262:    to contain offsets from the address of the table.
        !          1263:    Do not define this if the table should contain absolute addresses.  */
        !          1264: #define CASE_VECTOR_PC_RELATIVE
        !          1265: 
        !          1266: /* Specify the tree operation to be used to convert reals to integers.  */
        !          1267: #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
        !          1268: 
        !          1269: /* This is the kind of divide that is easiest to do in the general case.  */
        !          1270: #define EASY_DIV_EXPR TRUNC_DIV_EXPR
        !          1271: 
        !          1272: /* Define this as 1 if `char' should by default be signed; else as 0.  */
        !          1273: #define DEFAULT_SIGNED_CHAR 1
        !          1274: 
        !          1275: /* Don't cse the address of the function being compiled.  */
        !          1276: #define NO_RECURSIVE_FUNCTION_CSE
        !          1277: 
        !          1278: /* Max number of bytes we can move from memory to memory
        !          1279:    in one reasonably fast instruction.  */
        !          1280: #define MOVE_MAX 4
        !          1281: 
        !          1282: /* Define this if zero-extension is slow (more than one real instruction).  */
        !          1283: #define SLOW_ZERO_EXTEND
        !          1284: 
        !          1285: /* Nonzero if access to memory by bytes is slow and undesirable.  */
        !          1286: #define SLOW_BYTE_ACCESS 0
        !          1287: 
        !          1288: /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
        !          1289:    is done just by pretending it is already truncated.  */
        !          1290: #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
        !          1291: 
        !          1292: /* We assume that the store-condition-codes instructions store 0 for false
        !          1293:    and some other value for true.  This is the value stored for true.  */
        !          1294: 
        !          1295: #define STORE_FLAG_VALUE -1
        !          1296: 
        !          1297: /* When a prototype says `char' or `short', really pass an `int'.  */
        !          1298: #define PROMOTE_PROTOTYPES
        !          1299: 
        !          1300: /* Specify the machine mode that pointers have.
        !          1301:    After generation of rtl, the compiler makes no further distinction
        !          1302:    between pointers and any other objects of this machine mode.  */
        !          1303: #define Pmode SImode
        !          1304: 
        !          1305: /* A function address in a call instruction
        !          1306:    is a byte address (for indexing purposes)
        !          1307:    so give the MEM rtx a byte's mode.  */
        !          1308: #define FUNCTION_MODE QImode
        !          1309: 
        !          1310: /* Compute the cost of computing a constant rtl expression RTX
        !          1311:    whose rtx-code is CODE.  The body of this macro is a portion
        !          1312:    of a switch statement.  If the code is computed here,
        !          1313:    return it with a return statement.  Otherwise, break from the switch.  */
        !          1314: 
        !          1315: #define CONST_COSTS(RTX,CODE,OUTER_CODE) \
        !          1316:   case CONST_INT:                                              \
        !          1317:     /* Constant zero is super cheap due to clr instruction.  */        \
        !          1318:     if (RTX == const0_rtx) return 0;                           \
        !          1319:     /* Constants between -128 and 127 are cheap due to moveq */ \
        !          1320:     if (INTVAL (RTX) >= -128 && INTVAL (RTX) <= 127) return 1; \
        !          1321:     /* Constants between -136 and 254 are easily generated */  \
        !          1322:     /* by intelligent uses of moveq, add[q], and subq     */   \
        !          1323:     if ((OUTER_CODE) == SET && INTVAL (RTX) >= -136            \
        !          1324:        && INTVAL (RTX) <= 254) return 2;                       \
        !          1325:   case CONST:                                                  \
        !          1326:   case LABEL_REF:                                              \
        !          1327:   case SYMBOL_REF:                                             \
        !          1328:     return 3;                                                  \
        !          1329:   case CONST_DOUBLE:                                           \
        !          1330:     return 5;
        !          1331: 
        !          1332: /* Compute the cost of various arithmetic operations.
        !          1333:    These are vaguely right for a 68020.  */
        !          1334: /* The costs for long multiply have been adjusted to
        !          1335:    work properly in synth_mult on the 68020,
        !          1336:    relative to an average of the time for add and the time for shift,
        !          1337:    taking away a little more because sometimes move insns are needed.  */
        !          1338: #define MULL_COST (TARGET_68040 ? 5 : 13)
        !          1339: #define MULW_COST (TARGET_68040 ? 3 : 8)
        !          1340: 
        !          1341: #define RTX_COSTS(X,CODE,OUTER_CODE)                           \
        !          1342:   case PLUS:                                                   \
        !          1343:     /* An lea costs about three times as much as a simple add.  */  \
        !          1344:     if (GET_MODE (X) == SImode                                 \
        !          1345:        && GET_CODE (XEXP (X, 0)) == REG                        \
        !          1346:        && GET_CODE (XEXP (X, 1)) == MULT                       \
        !          1347:        && GET_CODE (XEXP (XEXP (X, 1), 0)) == REG              \
        !          1348:        && GET_CODE (XEXP (XEXP (X, 1), 1)) == CONST_INT        \
        !          1349:        && (INTVAL (XEXP (XEXP (X, 1), 1)) == 2                 \
        !          1350:            || INTVAL (XEXP (XEXP (X, 1), 1)) == 4              \
        !          1351:            || INTVAL (XEXP (XEXP (X, 1), 1)) == 8))            \
        !          1352:       return COSTS_N_INSNS (3);         /* lea an@(dx:l:i),am */       \
        !          1353:     break;                                                     \
        !          1354:   case ASHIFT:                                                 \
        !          1355:   case ASHIFTRT:                                               \
        !          1356:   case LSHIFT:                                                 \
        !          1357:   case LSHIFTRT:                                               \
        !          1358:     /* A shift by a big integer takes an extra instruction.  */ \
        !          1359:     if (GET_CODE (XEXP (X, 1)) == CONST_INT                    \
        !          1360:        && (INTVAL (XEXP (X, 1)) == 16))                        \
        !          1361:       return COSTS_N_INSNS (2);         /* clrw;swap */                \
        !          1362:     if (GET_CODE (XEXP (X, 1)) == CONST_INT                    \
        !          1363:        && !(INTVAL (XEXP (X, 1)) > 0                           \
        !          1364:             && INTVAL (XEXP (X, 1)) <= 8))                     \
        !          1365:       return COSTS_N_INSNS (3);         /* lsr #i,dn */                \
        !          1366:     break;                                                     \
        !          1367:   case MULT:                                                   \
        !          1368:     if (GET_CODE (XEXP (x, 1)) == CONST_INT                    \
        !          1369:        && exact_log2 (INTVAL (XEXP (x, 1))) >= 0)              \
        !          1370:       {                                                                \
        !          1371:        /* A shift by a big integer takes an extra instruction.  */ \
        !          1372:        if (GET_CODE (XEXP (X, 1)) == CONST_INT                 \
        !          1373:            && (INTVAL (XEXP (X, 1)) == (1 << 16)))             \
        !          1374:          return COSTS_N_INSNS (2);      /* clrw;swap */        \
        !          1375:        if (GET_CODE (XEXP (X, 1)) == CONST_INT                 \
        !          1376:            && !(INTVAL (XEXP (X, 1)) > 1                       \
        !          1377:                 && INTVAL (XEXP (X, 1)) <= 256))               \
        !          1378:          return COSTS_N_INSNS (3);      /* lsr #i,dn */        \
        !          1379:        break;                                                  \
        !          1380:       }                                                                \
        !          1381:     else if (GET_MODE (X) == QImode || GET_MODE (X) == HImode) \
        !          1382:       return COSTS_N_INSNS (MULW_COST);                                \
        !          1383:     else                                                       \
        !          1384:       return COSTS_N_INSNS (MULL_COST);                                \
        !          1385:     break;                                                     \
        !          1386:   case DIV:                                                    \
        !          1387:   case UDIV:                                                   \
        !          1388:   case MOD:                                                    \
        !          1389:   case UMOD:                                                   \
        !          1390:     if (GET_MODE (X) == QImode || GET_MODE (X) == HImode)      \
        !          1391:       return COSTS_N_INSNS (27); /* div.w */                   \
        !          1392:     return COSTS_N_INSNS (43);  /* div.l */
        !          1393: 
        !          1394: /* Tell final.c how to eliminate redundant test instructions.  */
        !          1395: 
        !          1396: /* Here we define machine-dependent flags and fields in cc_status
        !          1397:    (see `conditions.h').  */
        !          1398: 
        !          1399: /* Set if the cc value is actually in the 68881, so a floating point
        !          1400:    conditional branch must be output.  */
        !          1401: #define CC_IN_68881 04000
        !          1402: 
        !          1403: /* Store in cc_status the expressions that the condition codes will
        !          1404:    describe after execution of an instruction whose pattern is EXP.
        !          1405:    Do not alter them if the instruction would not alter the cc's.  */
        !          1406: 
        !          1407: /* On the 68000, all the insns to store in an address register fail to
        !          1408:    set the cc's.  However, in some cases these instructions can make it
        !          1409:    possibly invalid to use the saved cc's.  In those cases we clear out
        !          1410:    some or all of the saved cc's so they won't be used.  */
        !          1411: 
        !          1412: #define NOTICE_UPDATE_CC(EXP,INSN) notice_update_cc (EXP, INSN)
        !          1413: 
        !          1414: #define OUTPUT_JUMP(NORMAL, FLOAT, NO_OV)  \
        !          1415: { if (cc_prev_status.flags & CC_IN_68881)                      \
        !          1416:     return FLOAT;                                              \
        !          1417:   if (cc_prev_status.flags & CC_NO_OVERFLOW)                   \
        !          1418:     return NO_OV;                                              \
        !          1419:   return NORMAL; }
        !          1420: 
        !          1421: /* Control the assembler format that we output.  */
        !          1422: 
        !          1423: /* Output at beginning of assembler file.  */
        !          1424: 
        !          1425: #define ASM_FILE_START(FILE)   \
        !          1426:   fprintf (FILE, "#NO_APP\n");
        !          1427: 
        !          1428: /* Output to assembler file text saying following lines
        !          1429:    may contain character constants, extra white space, comments, etc.  */
        !          1430: 
        !          1431: #define ASM_APP_ON "#APP\n"
        !          1432: 
        !          1433: /* Output to assembler file text saying following lines
        !          1434:    no longer contain unusual constructs.  */
        !          1435: 
        !          1436: #define ASM_APP_OFF "#NO_APP\n"
        !          1437: 
        !          1438: /* Output before read-only data.  */
        !          1439: 
        !          1440: #define TEXT_SECTION_ASM_OP ".text"
        !          1441: 
        !          1442: /* Output before writable data.  */
        !          1443: 
        !          1444: #define DATA_SECTION_ASM_OP ".data"
        !          1445: 
        !          1446: /* Here are four prefixes that are used by asm_fprintf to
        !          1447:    facilitate customization for alternate assembler syntaxes.
        !          1448:    Machines with no likelihood of an alternate syntax need not
        !          1449:    define these and need not use asm_fprintf.  */
        !          1450: 
        !          1451: /* The prefix for register names.  Note that REGISTER_NAMES
        !          1452:    is supposed to include this prefix.  */
        !          1453: 
        !          1454: #define REGISTER_PREFIX ""
        !          1455: 
        !          1456: /* The prefix for local labels.  You should be able to define this as
        !          1457:    an empty string, or any arbitrary string (such as ".", ".L%", etc)
        !          1458:    without having to make any other changes to account for the specific
        !          1459:    definition.  Note it is a string literal, not interpreted by printf
        !          1460:    and friends. */
        !          1461: 
        !          1462: #define LOCAL_LABEL_PREFIX ""
        !          1463: 
        !          1464: /* The prefix to add to user-visible assembler symbols.  */
        !          1465: 
        !          1466: #define USER_LABEL_PREFIX "_"
        !          1467: 
        !          1468: /* The prefix for immediate operands.  */
        !          1469: 
        !          1470: #define IMMEDIATE_PREFIX "#"
        !          1471: 
        !          1472: /* How to refer to registers in assembler output.
        !          1473:    This sequence is indexed by compiler's hard-register-number (see above).  */
        !          1474: 
        !          1475: #ifndef SUPPORT_SUN_FPA
        !          1476: 
        !          1477: #define REGISTER_NAMES \
        !          1478: {"d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7",       \
        !          1479:  "a0", "a1", "a2", "a3", "a4", "a5", "a6", "sp",       \
        !          1480:  "fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7" }
        !          1481: 
        !          1482: #else /* SUPPORTED_SUN_FPA */
        !          1483: 
        !          1484: #define REGISTER_NAMES \
        !          1485: {"d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7",       \
        !          1486:  "a0", "a1", "a2", "a3", "a4", "a5", "a6", "sp",       \
        !          1487:  "fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7", \
        !          1488:  "fpa0", "fpa1", "fpa2", "fpa3", "fpa4", "fpa5", "fpa6", "fpa7", \
        !          1489:  "fpa8", "fpa9", "fpa10", "fpa11", "fpa12", "fpa13", "fpa14", "fpa15", \
        !          1490:  "fpa16", "fpa17", "fpa18", "fpa19", "fpa20", "fpa21", "fpa22", "fpa23", \
        !          1491:  "fpa24", "fpa25", "fpa26", "fpa27", "fpa28", "fpa29", "fpa30", "fpa31" }
        !          1492: 
        !          1493: #endif /* defined SUPPORT_SUN_FPA */
        !          1494: 
        !          1495: /* How to renumber registers for dbx and gdb.
        !          1496:    On the Sun-3, the floating point registers have numbers
        !          1497:    18 to 25, not 16 to 23 as they do in the compiler.  */
        !          1498: 
        !          1499: #define DBX_REGISTER_NUMBER(REGNO) ((REGNO) < 16 ? (REGNO) : (REGNO) + 2)
        !          1500: 
        !          1501: /* This is how to output the definition of a user-level label named NAME,
        !          1502:    such as the label on a static function or variable NAME.  */
        !          1503: 
        !          1504: #define ASM_OUTPUT_LABEL(FILE,NAME)    \
        !          1505:   do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
        !          1506: 
        !          1507: /* This is how to output a command to make the user-level label named NAME
        !          1508:    defined for reference from other files.  */
        !          1509: 
        !          1510: #define GLOBAL_ASM_OP ".globl"
        !          1511: #define ASM_GLOBALIZE_LABEL(FILE,NAME) \
        !          1512:   do { fprintf (FILE, "%s ", GLOBAL_ASM_OP);           \
        !          1513:        assemble_name (FILE, NAME);                     \
        !          1514:        fputs ("\n", FILE);} while (0)
        !          1515: 
        !          1516: /* This is how to output a reference to a user-level label named NAME.
        !          1517:    `assemble_name' uses this.  */
        !          1518: 
        !          1519: #define ASM_OUTPUT_LABELREF(FILE,NAME) \
        !          1520:   asm_fprintf (FILE, "%0U%s", NAME)
        !          1521: 
        !          1522: /* This is how to output an internal numbered label where
        !          1523:    PREFIX is the class of label and NUM is the number within the class.  */
        !          1524: 
        !          1525: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)     \
        !          1526:   asm_fprintf (FILE, "%0L%s%d:\n", PREFIX, NUM)
        !          1527: 
        !          1528: /* This is how to store into the string LABEL
        !          1529:    the symbol_ref name of an internal numbered label where
        !          1530:    PREFIX is the class of label and NUM is the number within the class.
        !          1531:    This is suitable for output with `assemble_name'.  */
        !          1532: 
        !          1533: #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)  \
        !          1534:   sprintf (LABEL, "*%s%s%d", LOCAL_LABEL_PREFIX, PREFIX, NUM)
        !          1535: 
        !          1536: /* This is how to output a `long double' extended real constant. */
        !          1537:   
        !          1538: #define ASM_OUTPUT_LONG_DOUBLE(FILE,VALUE)                             \
        !          1539: do { long l[3];                                                                \
        !          1540:      REAL_VALUE_TO_TARGET_LONG_DOUBLE (VALUE, l);                      \
        !          1541:      if (sizeof (int) == sizeof (long))                                        \
        !          1542:        fprintf (FILE, "\t.long 0x%x,0x%x,0x%x\n", l[0], l[1], l[2]);   \
        !          1543:      else                                                              \
        !          1544:        fprintf (FILE, "\t.long 0x%lx,0x%lx,0x%lx\n", l[0], l[1], l[2]);        \
        !          1545:    } while (0)
        !          1546:   
        !          1547: /* This is how to output an assembler line defining a `double' constant.  */
        !          1548: 
        !          1549: #define ASM_OUTPUT_DOUBLE(FILE,VALUE)                          \
        !          1550:   do { char dstr[30];                                          \
        !          1551:        REAL_VALUE_TO_DECIMAL (VALUE, "%.20g", dstr);           \
        !          1552:        fprintf (FILE, "\t.double 0r%s\n", dstr);               \
        !          1553:      } while (0)
        !          1554: 
        !          1555: /* This is how to output an assembler line defining a `float' constant.  */
        !          1556: 
        !          1557: #define ASM_OUTPUT_FLOAT(FILE,VALUE)                   \
        !          1558: do { long l;                                           \
        !          1559:      REAL_VALUE_TO_TARGET_SINGLE (VALUE, l);           \
        !          1560:      if (sizeof (int) == sizeof (long))                        \
        !          1561:        fprintf (FILE, "\t.long 0x%x\n", l);            \
        !          1562:      else                                              \
        !          1563:        fprintf (FILE, "\t.long 0x%lx\n", l);           \
        !          1564:    } while (0)
        !          1565: 
        !          1566: /* This is how to output an assembler line defining an `int' constant.  */
        !          1567: 
        !          1568: #define ASM_OUTPUT_INT(FILE,VALUE)  \
        !          1569: ( fprintf (FILE, "\t.long "),                  \
        !          1570:   output_addr_const (FILE, (VALUE)),           \
        !          1571:   fprintf (FILE, "\n"))
        !          1572: 
        !          1573: /* Likewise for `char' and `short' constants.  */
        !          1574: 
        !          1575: #define ASM_OUTPUT_SHORT(FILE,VALUE)  \
        !          1576: ( fprintf (FILE, "\t.word "),                  \
        !          1577:   output_addr_const (FILE, (VALUE)),           \
        !          1578:   fprintf (FILE, "\n"))
        !          1579: 
        !          1580: #define ASM_OUTPUT_CHAR(FILE,VALUE)  \
        !          1581: ( fprintf (FILE, "\t.byte "),                  \
        !          1582:   output_addr_const (FILE, (VALUE)),           \
        !          1583:   fprintf (FILE, "\n"))
        !          1584: 
        !          1585: /* This is how to output an assembler line for a numeric constant byte.  */
        !          1586: 
        !          1587: #define ASM_OUTPUT_BYTE(FILE,VALUE)  \
        !          1588:   fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
        !          1589: 
        !          1590: /* This is how to output an insn to push a register on the stack.
        !          1591:    It need not be very fast code.  */
        !          1592: 
        !          1593: #define ASM_OUTPUT_REG_PUSH(FILE,REGNO)  \
        !          1594:   asm_fprintf (FILE, "\tmovel %s,%Rsp@-\n", reg_names[REGNO])
        !          1595: 
        !          1596: /* This is how to output an insn to pop a register from the stack.
        !          1597:    It need not be very fast code.  */
        !          1598: 
        !          1599: #define ASM_OUTPUT_REG_POP(FILE,REGNO)  \
        !          1600:   asm_fprintf (FILE, "\tmovel %Rsp@+,%s\n", reg_names[REGNO])
        !          1601: 
        !          1602: /* This is how to output an element of a case-vector that is absolute.
        !          1603:    (The 68000 does not use such vectors,
        !          1604:    but we must define this macro anyway.)  */
        !          1605: 
        !          1606: #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
        !          1607:   asm_fprintf (FILE, "\t.long %LL%d\n", VALUE)
        !          1608: 
        !          1609: /* This is how to output an element of a case-vector that is relative.  */
        !          1610: 
        !          1611: #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL)  \
        !          1612:   asm_fprintf (FILE, "\t.word %LL%d-%LL%d\n", VALUE, REL)
        !          1613: 
        !          1614: /* This is how to output an assembler line
        !          1615:    that says to advance the location counter
        !          1616:    to a multiple of 2**LOG bytes.  */
        !          1617: 
        !          1618: /* We don't have a way to align to more than a two-byte boundary, so do the
        !          1619:    best we can and don't complain.  */
        !          1620: #define ASM_OUTPUT_ALIGN(FILE,LOG)     \
        !          1621:   if ((LOG) >= 1)                      \
        !          1622:     fprintf (FILE, "\t.even\n");
        !          1623: 
        !          1624: #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
        !          1625:   fprintf (FILE, "\t.skip %u\n", (SIZE))
        !          1626: 
        !          1627: /* This says how to output an assembler line
        !          1628:    to define a global common symbol.  */
        !          1629: 
        !          1630: #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
        !          1631: ( fputs (".comm ", (FILE)),                    \
        !          1632:   assemble_name ((FILE), (NAME)),              \
        !          1633:   fprintf ((FILE), ",%u\n", (ROUNDED)))
        !          1634: 
        !          1635: /* This says how to output an assembler line
        !          1636:    to define a local common symbol.  */
        !          1637: 
        !          1638: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
        !          1639: ( fputs (".lcomm ", (FILE)),                   \
        !          1640:   assemble_name ((FILE), (NAME)),              \
        !          1641:   fprintf ((FILE), ",%u\n", (ROUNDED)))
        !          1642: 
        !          1643: /* Store in OUTPUT a string (made with alloca) containing
        !          1644:    an assembler-name for a local static variable named NAME.
        !          1645:    LABELNO is an integer which is different for each call.  */
        !          1646: 
        !          1647: #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
        !          1648: ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10),   \
        !          1649:   sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
        !          1650: 
        !          1651: /* Define the parentheses used to group arithmetic operations
        !          1652:    in assembler code.  */
        !          1653: 
        !          1654: #define ASM_OPEN_PAREN "("
        !          1655: #define ASM_CLOSE_PAREN ")"
        !          1656: 
        !          1657: /* Define results of standard character escape sequences.  */
        !          1658: #define TARGET_BELL 007
        !          1659: #define TARGET_BS 010
        !          1660: #define TARGET_TAB 011
        !          1661: #define TARGET_NEWLINE 012
        !          1662: #define TARGET_VT 013
        !          1663: #define TARGET_FF 014
        !          1664: #define TARGET_CR 015
        !          1665: 
        !          1666: /* Output a float value (represented as a C double) as an immediate operand.
        !          1667:    This macro is a 68k-specific macro.  */
        !          1668: 
        !          1669: #define ASM_OUTPUT_FLOAT_OPERAND(CODE,FILE,VALUE)              \
        !          1670:  do {                                                          \
        !          1671:       if (CODE == 'f')                                         \
        !          1672:         {                                                      \
        !          1673:           char dstr[30];                                       \
        !          1674:           REAL_VALUE_TO_DECIMAL (VALUE, "%.9g", dstr);         \
        !          1675:           asm_fprintf ((FILE), "%I0r%s", dstr);                        \
        !          1676:         }                                                      \
        !          1677:       else                                                     \
        !          1678:         {                                                      \
        !          1679:           long l;                                              \
        !          1680:           REAL_VALUE_TO_TARGET_SINGLE (VALUE, l);              \
        !          1681:           if (sizeof (int) == sizeof (long))                   \
        !          1682:             asm_fprintf ((FILE), "%I0x%x", l);                 \
        !          1683:           else                                                 \
        !          1684:             asm_fprintf ((FILE), "%I0x%lx", l);                        \
        !          1685:         }                                                      \
        !          1686:      } while (0)
        !          1687: 
        !          1688: /* Output a double value (represented as a C double) as an immediate operand.
        !          1689:    This macro is a 68k-specific macro.  */
        !          1690: #define ASM_OUTPUT_DOUBLE_OPERAND(FILE,VALUE)                          \
        !          1691:  do { char dstr[30];                                                   \
        !          1692:       REAL_VALUE_TO_DECIMAL (VALUE, "%.20g", dstr);                    \
        !          1693:       asm_fprintf (FILE, "%I0r%s", dstr);                              \
        !          1694:     } while (0)
        !          1695: 
        !          1696: /* Note, long double immediate operands are not actually
        !          1697:    generated by m68k.md.  */
        !          1698: #define ASM_OUTPUT_LONG_DOUBLE_OPERAND(FILE,VALUE)                     \
        !          1699:  do { char dstr[30];                                                   \
        !          1700:       REAL_VALUE_TO_DECIMAL (VALUE, "%.20g", dstr);                    \
        !          1701:       asm_fprintf (FILE, "%I0r%s", dstr);                              \
        !          1702:     } while (0)
        !          1703: 
        !          1704: /* Print operand X (an rtx) in assembler syntax to file FILE.
        !          1705:    CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
        !          1706:    For `%' followed by punctuation, CODE is the punctuation and X is null.
        !          1707: 
        !          1708:    On the 68000, we use several CODE characters:
        !          1709:    '.' for dot needed in Motorola-style opcode names.
        !          1710:    '-' for an operand pushing on the stack:
        !          1711:        sp@-, -(sp) or -(%sp) depending on the style of syntax.
        !          1712:    '+' for an operand pushing on the stack:
        !          1713:        sp@+, (sp)+ or (%sp)+ depending on the style of syntax.
        !          1714:    '@' for a reference to the top word on the stack:
        !          1715:        sp@, (sp) or (%sp) depending on the style of syntax.
        !          1716:    '#' for an immediate operand prefix (# in MIT and Motorola syntax
        !          1717:        but & in SGS syntax).
        !          1718:    '!' for the fpcr register (used in some float-to-fixed conversions).
        !          1719:    '$' for the letter `s' in an op code, but only on the 68040.
        !          1720:    '&' for the letter `d' in an op code, but only on the 68040.
        !          1721:    '/' for register prefix needed by longlong.h.
        !          1722: 
        !          1723:    'b' for byte insn (no effect, on the Sun; this is for the ISI).
        !          1724:    'd' to force memory addressing to be absolute, not relative.
        !          1725:    'f' for float insn (print a CONST_DOUBLE as a float rather than in hex)
        !          1726:    'w' for FPA insn (print a CONST_DOUBLE as a SunFPA constant rather
        !          1727:        than directly).  Second part of 'y' below.
        !          1728:    'x' for float insn (print a CONST_DOUBLE as a float rather than in hex),
        !          1729:        or print pair of registers as rx:ry.
        !          1730:    'y' for a FPA insn (print pair of registers as rx:ry).  This also outputs
        !          1731:        CONST_DOUBLE's as SunFPA constant RAM registers if
        !          1732:        possible, so it should not be used except for the SunFPA. */
        !          1733: 
        !          1734: #define PRINT_OPERAND_PUNCT_VALID_P(CODE)                              \
        !          1735:   ((CODE) == '.' || (CODE) == '#' || (CODE) == '-'                     \
        !          1736:    || (CODE) == '+' || (CODE) == '@' || (CODE) == '!'                  \
        !          1737:    || (CODE) == '$' || (CODE) == '&' || (CODE) == '/')
        !          1738: 
        !          1739: /* A C compound statement to output to stdio stream STREAM the
        !          1740:    assembler syntax for an instruction operand X.  X is an RTL
        !          1741:    expression.
        !          1742: 
        !          1743:    CODE is a value that can be used to specify one of several ways
        !          1744:    of printing the operand.  It is used when identical operands
        !          1745:    must be printed differently depending on the context.  CODE
        !          1746:    comes from the `%' specification that was used to request
        !          1747:    printing of the operand.  If the specification was just `%DIGIT'
        !          1748:    then CODE is 0; if the specification was `%LTR DIGIT' then CODE
        !          1749:    is the ASCII code for LTR.
        !          1750: 
        !          1751:    If X is a register, this macro should print the register's name.
        !          1752:    The names can be found in an array `reg_names' whose type is
        !          1753:    `char *[]'.  `reg_names' is initialized from `REGISTER_NAMES'.
        !          1754: 
        !          1755:    When the machine description has a specification `%PUNCT' (a `%'
        !          1756:    followed by a punctuation character), this macro is called with
        !          1757:    a null pointer for X and the punctuation character for CODE.
        !          1758: 
        !          1759:    See m68k.c for the m68k specific codes.  */
        !          1760: 
        !          1761: #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE)
        !          1762: 
        !          1763: /* A C compound statement to output to stdio stream STREAM the
        !          1764:    assembler syntax for an instruction operand that is a memory
        !          1765:    reference whose address is ADDR.  ADDR is an RTL expression.
        !          1766: 
        !          1767:    On some machines, the syntax for a symbolic address depends on
        !          1768:    the section that the address refers to.  On these machines,
        !          1769:    define the macro `ENCODE_SECTION_INFO' to store the information
        !          1770:    into the `symbol_ref', and then check for it here.  */
        !          1771: 
        !          1772: #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR)
        !          1773: 
        !          1774: 
        !          1775: /* Define functions defined in aux-output.c and used in templates.  */
        !          1776: 
        !          1777: extern char *output_move_double ();
        !          1778: extern char *output_move_const_single ();
        !          1779: extern char *output_move_const_double ();
        !          1780: extern char *output_btst ();
        !          1781: 
        !          1782: /*
        !          1783: Local variables:
        !          1784: version-control: t
        !          1785: End:
        !          1786: */

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