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

1.1     ! root        1: /* Definitions of target machine for GNU compiler, for Sun SPARC.
        !             2:    Copyright (C) 1987, 1988, 1989, 1992 Free Software Foundation, Inc.
        !             3:    Contributed by Michael Tiemann ([email protected]).
        !             4: 
        !             5: This file is part of GNU CC.
        !             6: 
        !             7: GNU CC is free software; you can redistribute it and/or modify
        !             8: it under the terms of the GNU General Public License as published by
        !             9: the Free Software Foundation; either version 2, or (at your option)
        !            10: any later version.
        !            11: 
        !            12: GNU CC is distributed in the hope that it will be useful,
        !            13: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            14: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            15: GNU General Public License for more details.
        !            16: 
        !            17: You should have received a copy of the GNU General Public License
        !            18: along with GNU CC; see the file COPYING.  If not, write to
        !            19: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            20: 
        !            21: /* 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: #define LIB_SPEC "%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} %{g:-lg} \
        !            25:   %{a:/usr/lib/bb_link.o}"
        !            26: 
        !            27: /* Provide required defaults for linker -e and -d switches.  */
        !            28: 
        !            29: #define LINK_SPEC \
        !            30:  "%{!nostdlib:%{!r*:%{!e*:-e start}}} -dc -dp %{static:-Bstatic} %{assert*}"
        !            31: 
        !            32: /* Special flags to the Sun-4 assembler when using pipe for input.  */
        !            33: 
        !            34: #define ASM_SPEC " %| %{fpic:-k} %{fPIC:-k}"
        !            35: 
        !            36: /* Define macros to distinguish architectures.  */
        !            37: #define CPP_SPEC "%{msparclite:-D__sparclite__} %{mv8:-D__sparc_v8__}"
        !            38: 
        !            39: /* Prevent error on `-sun4' and `-target sun4' options.  */
        !            40: /* This used to translate -dalign to -malign, but that is no good
        !            41:    because it can't turn off the usual meaning of making debugging dumps.  */
        !            42: 
        !            43: #define CC1_SPEC "%{sun4:} %{target:}"
        !            44: 
        !            45: #if 0
        !            46: /* ??? This fails because REAL_VALUE_TYPE is `double' making it impossible to
        !            47:    represent and output `long double' constants.  This causes problems during
        !            48:    a bootstrap with enquire/float.h, and hence must be disabled for now.
        !            49:    To fix, we need to implement code for TFmode just like the existing XFmode
        !            50:    support in real.[ch].  */
        !            51: /* Sparc ABI says that long double is 4 words.  */
        !            52: 
        !            53: #define LONG_DOUBLE_TYPE_SIZE 128
        !            54: #endif
        !            55: 
        !            56: #define PTRDIFF_TYPE "int"
        !            57: /* In 2.4 it should work to delete this.
        !            58:    #define SIZE_TYPE "int"  */
        !            59: #define WCHAR_TYPE "short unsigned int"
        !            60: #define WCHAR_TYPE_SIZE 16
        !            61: 
        !            62: /* Omit frame pointer at high optimization levels.  */
        !            63:   
        !            64: #define OPTIMIZATION_OPTIONS(OPTIMIZE) \
        !            65: {                                                              \
        !            66:   if (OPTIMIZE >= 2)                                           \
        !            67:     {                                                          \
        !            68:       flag_omit_frame_pointer = 1;                             \
        !            69:     }                                                          \
        !            70: }
        !            71: 
        !            72: /* To make profiling work with -f{pic,PIC}, we need to emit the profiling
        !            73:    code into the rtl.  Also, if we are profiling, we cannot eliminate
        !            74:    the frame pointer (because the return address will get smashed).  */
        !            75: 
        !            76: #define OVERRIDE_OPTIONS \
        !            77:   do { if (profile_flag || profile_block_flag) \
        !            78:         flag_omit_frame_pointer = 0, flag_pic = 0; } while (0)
        !            79: 
        !            80: /* These compiler options take an argument.  We ignore -target for now.  */
        !            81: 
        !            82: #define WORD_SWITCH_TAKES_ARG(STR)                             \
        !            83:  (DEFAULT_WORD_SWITCH_TAKES_ARG (STR)                          \
        !            84:   || !strcmp (STR, "target") || !strcmp (STR, "assert"))
        !            85: 
        !            86: /* Names to predefine in the preprocessor for this target machine.  */
        !            87: 
        !            88: /* The GCC_NEW_VARARGS macro is so that old versions of gcc can compile
        !            89:    new versions, which have an incompatible va-sparc.h file.  This matters
        !            90:    because gcc does "gvarargs.h" instead of <varargs.h>, and thus gets the
        !            91:    wrong varargs file when it is compiled with a different version of gcc.  */
        !            92: 
        !            93: #define CPP_PREDEFINES "-Dsparc -Dsun -Dunix -D__GCC_NEW_VARARGS__"
        !            94: 
        !            95: /* Print subsidiary information on the compiler version in use.  */
        !            96: 
        !            97: #define TARGET_VERSION fprintf (stderr, " (sparc)");
        !            98: 
        !            99: /* Generate DBX debugging information.  */
        !           100: 
        !           101: #define DBX_DEBUGGING_INFO
        !           102: 
        !           103: /* Run-time compilation parameters selecting different hardware subsets.  */
        !           104: 
        !           105: extern int target_flags;
        !           106: 
        !           107: /* Nonzero if we should generate code to use the fpu.  */
        !           108: #define TARGET_FPU (target_flags & 1)
        !           109: 
        !           110: /* Nonzero if we should use FUNCTION_EPILOGUE.  Otherwise, we
        !           111:    use fast return insns, but lose some generality.  */
        !           112: #define TARGET_EPILOGUE (target_flags & 2)
        !           113: 
        !           114: /* Nonzero if we should assume that double pointers might be unaligned.
        !           115:    This can happen when linking gcc compiled code with other compilers,
        !           116:    because the ABI only guarantees 4 byte alignment.  */
        !           117: #define TARGET_UNALIGNED_DOUBLES (target_flags & 4)
        !           118: 
        !           119: /* Nonzero means that we should generate code for a v8 sparc.  */
        !           120: #define TARGET_V8 (target_flags & 64)
        !           121: 
        !           122: /* Nonzero means that we should generate code for a sparclite.  */
        !           123: #define TARGET_SPARCLITE (target_flags & 128)
        !           124: 
        !           125: /* Nonzero means that we should generate code using a flat register window
        !           126:    model, i.e. no save/restore instructions are generated, in the most
        !           127:    efficient manner.  This code is not compatible with normal sparc code.  */
        !           128: /* This is not a user selectable option yet, because it requires changes
        !           129:    that are not yet switchable via command line arguments.  */
        !           130: #define TARGET_FRW (target_flags & 256)
        !           131: 
        !           132: /* Nonzero means that we should generate code using a flat register window
        !           133:    model, i.e. no save/restore instructions are generated, but which is
        !           134:    compatible with normal sparc code.   This is the same as above, except
        !           135:    that the frame pointer is %l6 instead of %fp.  This code is not as efficient
        !           136:    as TARGET_FRW, because it has one less allocatable register.  */
        !           137: /* This is not a user selectable option yet, because it requires changes
        !           138:    that are not yet switchable via command line arguments.  */
        !           139: #define TARGET_FRW_COMPAT (target_flags & 512)
        !           140: 
        !           141: /* Macro to define tables used to set the flags.
        !           142:    This is a list in braces of pairs in braces,
        !           143:    each pair being { "NAME", VALUE }
        !           144:    where VALUE is the bits to set or minus the bits to clear.
        !           145:    An empty string NAME is used to identify the default VALUE.  */
        !           146: 
        !           147: #define TARGET_SWITCHES  \
        !           148:   { {"fpu", 1},                        \
        !           149:     {"no-fpu", -1},            \
        !           150:     {"hard-float", 1},         \
        !           151:     {"soft-float", -1},                \
        !           152:     {"epilogue", 2},           \
        !           153:     {"no-epilogue", -2},       \
        !           154:     {"unaligned-doubles", 4},  \
        !           155:     {"no-unaligned-doubles", -4},\
        !           156:     {"v8", 64},                        \
        !           157:     {"no-v8", -64},            \
        !           158:     {"sparclite", 128},                \
        !           159:     {"sparclite", -1},         \
        !           160:     {"no-sparclite", -128},    \
        !           161:     {"no-sparclite", 1},       \
        !           162: /*  {"frw", 256}, */           \
        !           163: /*  {"no-frw", -256}, */       \
        !           164: /*  {"frw-compat", 256+512}, */        \
        !           165: /*  {"no-frw-compat", -(256+512)}, */ \
        !           166:     { "", TARGET_DEFAULT}}
        !           167: 
        !           168: #define TARGET_DEFAULT 3
        !           169: 
        !           170: /* target machine storage layout */
        !           171: 
        !           172: /* Define this if most significant bit is lowest numbered
        !           173:    in instructions that operate on numbered bit-fields.  */
        !           174: #define BITS_BIG_ENDIAN 1
        !           175: 
        !           176: /* Define this if most significant byte of a word is the lowest numbered.  */
        !           177: /* This is true on the SPARC.  */
        !           178: #define BYTES_BIG_ENDIAN 1
        !           179: 
        !           180: /* Define this if most significant word of a multiword number is the lowest
        !           181:    numbered.  */
        !           182: /* Doubles are stored in memory with the high order word first.  This
        !           183:    matters when cross-compiling.  */
        !           184: #define WORDS_BIG_ENDIAN 1
        !           185: 
        !           186: /* number of bits in an addressable storage unit */
        !           187: #define BITS_PER_UNIT 8
        !           188: 
        !           189: /* Width in bits of a "word", which is the contents of a machine register.
        !           190:    Note that this is not necessarily the width of data type `int';
        !           191:    if using 16-bit ints on a 68000, this would still be 32.
        !           192:    But on a machine with 16-bit registers, this would be 16.  */
        !           193: #define BITS_PER_WORD 32
        !           194: #define MAX_BITS_PER_WORD 32
        !           195: 
        !           196: /* Width of a word, in units (bytes).  */
        !           197: #define UNITS_PER_WORD 4
        !           198: 
        !           199: /* Width in bits of a pointer.
        !           200:    See also the macro `Pmode' defined below.  */
        !           201: #define POINTER_SIZE 32
        !           202: 
        !           203: /* Allocation boundary (in *bits*) for storing arguments in argument list.  */
        !           204: #define PARM_BOUNDARY 32
        !           205: 
        !           206: /* Boundary (in *bits*) on which stack pointer should be aligned.  */
        !           207: #define STACK_BOUNDARY 64
        !           208: 
        !           209: /* ALIGN FRAMES on double word boundaries */
        !           210: 
        !           211: #define SPARC_STACK_ALIGN(LOC) (((LOC)+7) & 0xfffffff8)
        !           212: 
        !           213: /* Allocation boundary (in *bits*) for the code of a function.  */
        !           214: #define FUNCTION_BOUNDARY 32
        !           215: 
        !           216: /* Alignment of field after `int : 0' in a structure.  */
        !           217: #define EMPTY_FIELD_BOUNDARY 32
        !           218: 
        !           219: /* Every structure's size must be a multiple of this.  */
        !           220: #define STRUCTURE_SIZE_BOUNDARY 8
        !           221: 
        !           222: /* A bitfield declared as `int' forces `int' alignment for the struct.  */
        !           223: #define PCC_BITFIELD_TYPE_MATTERS 1
        !           224: 
        !           225: /* No data type wants to be aligned rounder than this.  */
        !           226: #define BIGGEST_ALIGNMENT 64
        !           227: 
        !           228: /* The best alignment to use in cases where we have a choice.  */
        !           229: #define FASTEST_ALIGNMENT 64
        !           230: 
        !           231: /* Make strings word-aligned so strcpy from constants will be faster.  */
        !           232: #define CONSTANT_ALIGNMENT(EXP, ALIGN)  \
        !           233:   ((TREE_CODE (EXP) == STRING_CST      \
        !           234:     && (ALIGN) < FASTEST_ALIGNMENT)    \
        !           235:    ? FASTEST_ALIGNMENT : (ALIGN))
        !           236: 
        !           237: /* Make arrays of chars word-aligned for the same reasons.  */
        !           238: #define DATA_ALIGNMENT(TYPE, ALIGN)            \
        !           239:   (TREE_CODE (TYPE) == ARRAY_TYPE              \
        !           240:    && TYPE_MODE (TREE_TYPE (TYPE)) == QImode   \
        !           241:    && (ALIGN) < FASTEST_ALIGNMENT ? FASTEST_ALIGNMENT : (ALIGN))
        !           242: 
        !           243: /* Set this nonzero if move instructions will actually fail to work
        !           244:    when given unaligned data.  */
        !           245: #define STRICT_ALIGNMENT 1
        !           246: 
        !           247: /* Things that must be doubleword aligned cannot go in the text section,
        !           248:    because the linker fails to align the text section enough!
        !           249:    Put them in the data section.  */
        !           250: #define MAX_TEXT_ALIGN 32
        !           251: 
        !           252: #define SELECT_SECTION(T,RELOC)                                                \
        !           253: {                                                                      \
        !           254:   if (TREE_CODE (T) == VAR_DECL)                                       \
        !           255:     {                                                                  \
        !           256:       if (TREE_READONLY (T) && ! TREE_SIDE_EFFECTS (T)                 \
        !           257:          && DECL_ALIGN (T) <= MAX_TEXT_ALIGN                           \
        !           258:          && ! (flag_pic && (RELOC)))                                   \
        !           259:        text_section ();                                                \
        !           260:       else                                                             \
        !           261:        data_section ();                                                \
        !           262:     }                                                                  \
        !           263:   else if (TREE_CODE (T) == CONSTRUCTOR)                               \
        !           264:     {                                                                  \
        !           265:       if (flag_pic != 0 && (RELOC) != 0)                               \
        !           266:        data_section ();                                                \
        !           267:     }                                                                  \
        !           268:   else if (*tree_code_type[(int) TREE_CODE (T)] == 'c')                        \
        !           269:     {                                                                  \
        !           270:       if ((TREE_CODE (T) == STRING_CST && flag_writable_strings)       \
        !           271:          || TYPE_ALIGN (TREE_TYPE (T)) > MAX_TEXT_ALIGN)               \
        !           272:        data_section ();                                                \
        !           273:       else                                                             \
        !           274:        text_section ();                                                \
        !           275:     }                                                                  \
        !           276: }
        !           277: 
        !           278: /* Use text section for a constant
        !           279:    unless we need more alignment than that offers.  */
        !           280: #define SELECT_RTX_SECTION(MODE, X)            \
        !           281: {                                              \
        !           282:   if (GET_MODE_BITSIZE (MODE) <= MAX_TEXT_ALIGN \
        !           283:       && ! (flag_pic && symbolic_operand (X)))  \
        !           284:     text_section ();                           \
        !           285:   else                                         \
        !           286:     data_section ();                           \
        !           287: }
        !           288: 
        !           289: /* Standard register usage.  */
        !           290: 
        !           291: /* Number of actual hardware registers.
        !           292:    The hardware registers are assigned numbers for the compiler
        !           293:    from 0 to just below FIRST_PSEUDO_REGISTER.
        !           294:    All registers that the compiler knows about must be given numbers,
        !           295:    even those that are not normally considered general registers.
        !           296: 
        !           297:    SPARC has 32 integer registers and 32 floating point registers.  */
        !           298: 
        !           299: #define FIRST_PSEUDO_REGISTER 64
        !           300: 
        !           301: /* 1 for registers that have pervasive standard uses
        !           302:    and are not available for the register allocator.
        !           303:    g0 is used for the condition code and not to represent %g0, which is
        !           304:    hardwired to 0, so reg 0 is *not* fixed.
        !           305:    g1 through g4 are free to use as temporaries.
        !           306:    g5 through g7 are reserved for the operating system.  */
        !           307: #define FIXED_REGISTERS  \
        !           308:  {0, 0, 0, 0, 0, 1, 1, 1,      \
        !           309:   0, 0, 0, 0, 0, 0, 1, 0,      \
        !           310:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           311:   0, 0, 0, 0, 0, 0, 1, 1,      \
        !           312:                                \
        !           313:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           314:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           315:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           316:   0, 0, 0, 0, 0, 0, 0, 0}
        !           317: 
        !           318: /* 1 for registers not available across function calls.
        !           319:    These must include the FIXED_REGISTERS and also any
        !           320:    registers that can be used without being saved.
        !           321:    The latter must include the registers where values are returned
        !           322:    and the register where structure-value addresses are passed.
        !           323:    Aside from that, you can include as many other registers as you like.  */
        !           324: #define CALL_USED_REGISTERS  \
        !           325:  {1, 1, 1, 1, 1, 1, 1, 1,      \
        !           326:   1, 1, 1, 1, 1, 1, 1, 1,      \
        !           327:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           328:   0, 0, 0, 0, 0, 0, 1, 1,      \
        !           329:                                \
        !           330:   1, 1, 1, 1, 1, 1, 1, 1,      \
        !           331:   1, 1, 1, 1, 1, 1, 1, 1,      \
        !           332:   1, 1, 1, 1, 1, 1, 1, 1,      \
        !           333:   1, 1, 1, 1, 1, 1, 1, 1}
        !           334: 
        !           335: /* If !TARGET_FPU, then make the fp registers fixed so that they won't
        !           336:    be allocated.  */
        !           337: 
        !           338: #define CONDITIONAL_REGISTER_USAGE                             \
        !           339: do                                                             \
        !           340:   {                                                            \
        !           341:     if (! TARGET_FPU)                                          \
        !           342:       {                                                                \
        !           343:        int regno;                                              \
        !           344:        for (regno = 32; regno < 64; regno++)                   \
        !           345:          fixed_regs[regno] = 1;                                \
        !           346:       }                                                                \
        !           347:   }                                                            \
        !           348: while (0)
        !           349: 
        !           350: /* Return number of consecutive hard regs needed starting at reg REGNO
        !           351:    to hold something of mode MODE.
        !           352:    This is ordinarily the length in words of a value of mode MODE
        !           353:    but can be less for certain modes in special long registers.
        !           354: 
        !           355:    On SPARC, ordinary registers hold 32 bits worth;
        !           356:    this means both integer and floating point registers.
        !           357: 
        !           358:    We use vectors to keep this information about registers.  */
        !           359: 
        !           360: /* How many hard registers it takes to make a register of this mode.  */
        !           361: extern int hard_regno_nregs[];
        !           362: 
        !           363: #define HARD_REGNO_NREGS(REGNO, MODE)   \
        !           364:   ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
        !           365: 
        !           366: /* Value is 1 if register/mode pair is acceptable on sparc.  */
        !           367: extern int hard_regno_mode_ok[FIRST_PSEUDO_REGISTER];
        !           368: 
        !           369: /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
        !           370:    On SPARC, the cpu registers can hold any mode but the float registers
        !           371:    can only hold SFmode or DFmode.  See sparc.c for how we
        !           372:    initialize this.  */
        !           373: #define HARD_REGNO_MODE_OK(REGNO, MODE) \
        !           374:   ((hard_regno_mode_ok[REGNO] & (1<<(int)(MODE))) != 0)
        !           375: 
        !           376: /* Value is 1 if it is a good idea to tie two pseudo registers
        !           377:    when one has mode MODE1 and one has mode MODE2.
        !           378:    If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
        !           379:    for any hard reg, then this must be 0 for correct output.  */
        !           380: #define MODES_TIEABLE_P(MODE1, MODE2) \
        !           381:   ((MODE1) == (MODE2) || GET_MODE_CLASS (MODE1) == GET_MODE_CLASS (MODE2))
        !           382: 
        !           383: /* Specify the registers used for certain standard purposes.
        !           384:    The values of these macros are register numbers.  */
        !           385: 
        !           386: /* SPARC pc isn't overloaded on a register that the compiler knows about.  */
        !           387: /* #define PC_REGNUM  */
        !           388: 
        !           389: /* Register to use for pushing function arguments.  */
        !           390: #define STACK_POINTER_REGNUM 14
        !           391: 
        !           392: /* Actual top-of-stack address is 92 greater than the contents
        !           393:    of the stack pointer register.  92 = 68 + 24.  64 bytes reserving space
        !           394:    for the ins and local registers, 4 byte for structure return address, and
        !           395:    24 bytes for the 6 register parameters.  */
        !           396: #define STACK_POINTER_OFFSET FIRST_PARM_OFFSET(0)
        !           397: 
        !           398: /* Base register for access to local variables of the function.  */
        !           399: #define FRAME_POINTER_REGNUM 30
        !           400: 
        !           401: #if 0
        !           402: /* Register that is used for the return address.  */
        !           403: #define RETURN_ADDR_REGNUM 15
        !           404: #endif
        !           405: 
        !           406: /* Value should be nonzero if functions must have frame pointers.
        !           407:    Zero means the frame pointer need not be set up (and parms
        !           408:    may be accessed via the stack pointer) in functions that seem suitable.
        !           409:    This is computed in `reload', in reload1.c.
        !           410: 
        !           411:    Used in flow.c, global.c, and reload1.c.  */
        !           412: extern int leaf_function;
        !           413: 
        !           414: #define FRAME_POINTER_REQUIRED \
        !           415:   (! (leaf_function_p () && only_leaf_regs_used ()))
        !           416: 
        !           417: /* C statement to store the difference between the frame pointer
        !           418:    and the stack pointer values immediately after the function prologue.
        !           419: 
        !           420:    Note, we always pretend that this is a leaf function because if
        !           421:    it's not, there's no point in trying to eliminate the
        !           422:    frame pointer.  If it is a leaf function, we guessed right!  */
        !           423: #define INITIAL_FRAME_POINTER_OFFSET(VAR) \
        !           424:   ((VAR) = (TARGET_FRW ? sparc_frw_compute_frame_size (get_frame_size ()) \
        !           425:            : compute_frame_size (get_frame_size (), 1)))
        !           426: 
        !           427: /* Base register for access to arguments of the function.  */
        !           428: #define ARG_POINTER_REGNUM 30
        !           429: 
        !           430: /* Register in which static-chain is passed to a function.  */
        !           431: /* ??? */
        !           432: #define STATIC_CHAIN_REGNUM 1
        !           433: 
        !           434: /* Register which holds offset table for position-independent
        !           435:    data references.  */
        !           436: 
        !           437: #define PIC_OFFSET_TABLE_REGNUM 23
        !           438: 
        !           439: #define INITIALIZE_PIC initialize_pic ()
        !           440: #define FINALIZE_PIC finalize_pic ()
        !           441: 
        !           442: /* Sparc ABI says that quad-precision floats and all structures are returned
        !           443:    in memory.  */
        !           444: #define RETURN_IN_MEMORY(TYPE) \
        !           445:   (TYPE_MODE (TYPE) == BLKmode || TYPE_MODE (TYPE) == TFmode)
        !           446: 
        !           447: /* Functions which return large structures get the address
        !           448:    to place the wanted value at offset 64 from the frame.
        !           449:    Must reserve 64 bytes for the in and local registers.  */
        !           450: /* Used only in other #defines in this file.  */
        !           451: #define STRUCT_VALUE_OFFSET 64
        !           452: 
        !           453: #define STRUCT_VALUE \
        !           454:   gen_rtx (MEM, Pmode,                                 \
        !           455:           gen_rtx (PLUS, Pmode, stack_pointer_rtx,     \
        !           456:                    gen_rtx (CONST_INT, VOIDmode, STRUCT_VALUE_OFFSET)))
        !           457: #define STRUCT_VALUE_INCOMING \
        !           458:   gen_rtx (MEM, Pmode,                                 \
        !           459:           gen_rtx (PLUS, Pmode, frame_pointer_rtx,     \
        !           460:                    gen_rtx (CONST_INT, VOIDmode, STRUCT_VALUE_OFFSET)))
        !           461: 
        !           462: /* Define the classes of registers for register constraints in the
        !           463:    machine description.  Also define ranges of constants.
        !           464: 
        !           465:    One of the classes must always be named ALL_REGS and include all hard regs.
        !           466:    If there is more than one class, another class must be named NO_REGS
        !           467:    and contain no registers.
        !           468: 
        !           469:    The name GENERAL_REGS must be the name of a class (or an alias for
        !           470:    another name such as ALL_REGS).  This is the class of registers
        !           471:    that is allowed by "g" or "r" in a register constraint.
        !           472:    Also, registers outside this class are allocated only when
        !           473:    instructions express preferences for them.
        !           474: 
        !           475:    The classes must be numbered in nondecreasing order; that is,
        !           476:    a larger-numbered class must never be contained completely
        !           477:    in a smaller-numbered class.
        !           478: 
        !           479:    For any two classes, it is very desirable that there be another
        !           480:    class that represents their union.  */
        !           481: 
        !           482: /* The SPARC has two kinds of registers, general and floating point.  */
        !           483: 
        !           484: enum reg_class { NO_REGS, GENERAL_REGS, FP_REGS, ALL_REGS, LIM_REG_CLASSES };
        !           485: 
        !           486: #define N_REG_CLASSES (int) LIM_REG_CLASSES
        !           487: 
        !           488: /* Give names of register classes as strings for dump file.   */
        !           489: 
        !           490: #define REG_CLASS_NAMES \
        !           491:  {"NO_REGS", "GENERAL_REGS", "FP_REGS", "ALL_REGS" }
        !           492: 
        !           493: /* Define which registers fit in which classes.
        !           494:    This is an initializer for a vector of HARD_REG_SET
        !           495:    of length N_REG_CLASSES.  */
        !           496: 
        !           497: #if 0 && defined (__GNUC__)
        !           498: #define REG_CLASS_CONTENTS {0LL, 0xfffffffeLL, 0xffffffff00000000LL, 0xfffffffffffffffeLL}
        !           499: #else
        !           500: #define REG_CLASS_CONTENTS {{0, 0}, {-2, 0}, {0, -1}, {-2, -1}}
        !           501: #endif
        !           502: 
        !           503: /* The same information, inverted:
        !           504:    Return the class number of the smallest class containing
        !           505:    reg number REGNO.  This could be a conditional expression
        !           506:    or could index an array.  */
        !           507: 
        !           508: #define REGNO_REG_CLASS(REGNO) \
        !           509:   ((REGNO) >= 32 ? FP_REGS : (REGNO) == 0 ? NO_REGS : GENERAL_REGS)
        !           510: 
        !           511: /* This is the order in which to allocate registers
        !           512:    normally.  
        !           513:    
        !           514:    We put %f0/%f1 last among the float registers, so as to make it more
        !           515:    likely that a pseduo-register which dies in the float return register
        !           516:    will get allocated to the float return register, thus saving a move
        !           517:    instruction at the end of the function.  */
        !           518: #define REG_ALLOC_ORDER \
        !           519: { 8, 9, 10, 11, 12, 13, 2, 3,          \
        !           520:   15, 16, 17, 18, 19, 20, 21, 22,      \
        !           521:   23, 24, 25, 26, 27, 28, 29, 31,      \
        !           522:   34, 35, 36, 37, 38, 39,              \
        !           523:   40, 41, 42, 43, 44, 45, 46, 47,      \
        !           524:   48, 49, 50, 51, 52, 53, 54, 55,      \
        !           525:   56, 57, 58, 59, 60, 61, 62, 63,      \
        !           526:   32, 33,                              \
        !           527:   1, 4, 5, 6, 7, 0, 14, 30}
        !           528: 
        !           529: /* This is the order in which to allocate registers for
        !           530:    leaf functions.  If all registers can fit in the "i" registers,
        !           531:    then we have the possibility of having a leaf function.  */
        !           532: #define REG_LEAF_ALLOC_ORDER \
        !           533: { 2, 3, 24, 25, 26, 27, 28, 29,                \
        !           534:   15, 8, 9, 10, 11, 12, 13,            \
        !           535:   16, 17, 18, 19, 20, 21, 22, 23,      \
        !           536:   34, 35, 36, 37, 38, 39,              \
        !           537:   40, 41, 42, 43, 44, 45, 46, 47,      \
        !           538:   48, 49, 50, 51, 52, 53, 54, 55,      \
        !           539:   56, 57, 58, 59, 60, 61, 62, 63,      \
        !           540:   32, 33,                              \
        !           541:   1, 4, 5, 6, 7, 0, 14, 30, 31}
        !           542: 
        !           543: #define ORDER_REGS_FOR_LOCAL_ALLOC order_regs_for_local_alloc ()
        !           544: 
        !           545: #define LEAF_REGISTERS \
        !           546: { 1, 1, 1, 1, 1, 1, 1, 1,      \
        !           547:   0, 0, 0, 0, 0, 0, 1, 0,      \
        !           548:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           549:   1, 1, 1, 1, 1, 1, 0, 1,      \
        !           550:   1, 1, 1, 1, 1, 1, 1, 1,      \
        !           551:   1, 1, 1, 1, 1, 1, 1, 1,      \
        !           552:   1, 1, 1, 1, 1, 1, 1, 1,      \
        !           553:   1, 1, 1, 1, 1, 1, 1, 1}
        !           554: 
        !           555: extern char leaf_reg_remap[];
        !           556: #define LEAF_REG_REMAP(REGNO) (leaf_reg_remap[REGNO])
        !           557: extern char leaf_reg_backmap[];
        !           558: #define LEAF_REG_BACKMAP(REGNO) (leaf_reg_backmap[REGNO])
        !           559: 
        !           560: /* The class value for index registers, and the one for base regs.  */
        !           561: #define INDEX_REG_CLASS GENERAL_REGS
        !           562: #define BASE_REG_CLASS GENERAL_REGS
        !           563: 
        !           564: /* Get reg_class from a letter such as appears in the machine description.  */
        !           565: 
        !           566: #define REG_CLASS_FROM_LETTER(C) \
        !           567:   ((C) == 'f' ? FP_REGS : (C) == 'r' ? GENERAL_REGS : NO_REGS)
        !           568: 
        !           569: /* The letters I, J, K, L and M in a register constraint string
        !           570:    can be used to stand for particular ranges of immediate operands.
        !           571:    This macro defines what the ranges are.
        !           572:    C is the letter, and VALUE is a constant value.
        !           573:    Return 1 if VALUE is in the range specified by C.
        !           574: 
        !           575:    For SPARC, `I' is used for the range of constants an insn
        !           576:    can actually contain.
        !           577:    `J' is used for the range which is just zero (since that is R0).
        !           578:    `K' is used for constants which can be loaded with a single sethi insn.  */
        !           579: 
        !           580: #define SMALL_INT(X) ((unsigned) (INTVAL (X) + 0x1000) < 0x2000)
        !           581: 
        !           582: #define CONST_OK_FOR_LETTER_P(VALUE, C)  \
        !           583:   ((C) == 'I' ? (unsigned) ((VALUE) + 0x1000) < 0x2000 \
        !           584:    : (C) == 'J' ? (VALUE) == 0                         \
        !           585:    : (C) == 'K' ? ((VALUE) & 0x3ff) == 0               \
        !           586:    : 0)
        !           587: 
        !           588: /* Similar, but for floating constants, and defining letters G and H.
        !           589:    Here VALUE is the CONST_DOUBLE rtx itself.  */
        !           590: 
        !           591: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
        !           592:   ((C) == 'G' ? CONST_DOUBLE_HIGH (VALUE) == 0         \
        !           593:    && CONST_DOUBLE_LOW (VALUE) == 0                    \
        !           594:    : (C) == 'H' ? arith_double_operand (VALUE, DImode) \
        !           595:    : 0)
        !           596: 
        !           597: /* Given an rtx X being reloaded into a reg required to be
        !           598:    in class CLASS, return the class of reg to actually use.
        !           599:    In general this is just CLASS; but on some machines
        !           600:    in some cases it is preferable to use a more restrictive class.  */
        !           601: /* We can't load constants into FP registers.  We can't load any FP constant
        !           602:    if an 'E' constraint fails to match it.  */
        !           603: #define PREFERRED_RELOAD_CLASS(X,CLASS)                        \
        !           604:   (CONSTANT_P (X)                                      \
        !           605:    && ((CLASS) == FP_REGS                              \
        !           606:        || (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \
        !           607:           && (HOST_FLOAT_FORMAT != IEEE_FLOAT_FORMAT   \
        !           608:               || HOST_BITS_PER_INT != BITS_PER_WORD))) \
        !           609:    ? NO_REGS : (CLASS))
        !           610: 
        !           611: /* Return the register class of a scratch register needed to load IN into
        !           612:    a register of class CLASS in MODE.
        !           613: 
        !           614:    On the SPARC, when PIC, we need a temporary when loading some addresses
        !           615:    into a register.
        !           616: 
        !           617:    Also, we need a temporary when loading/storing a HImode/QImode value
        !           618:    between memory and the FPU registers.  This can happen when combine puts
        !           619:    a paradoxical subreg in a float/fix conversion insn.  */
        !           620: 
        !           621: #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, IN)          \
        !           622:   (flag_pic && pic_address_needs_scratch (IN) ? GENERAL_REGS   \
        !           623:    : ((CLASS) == FP_REGS && ((MODE) == HImode || (MODE) == QImode)\
        !           624:       && (GET_CODE (IN) == MEM                                 \
        !           625:          || ((GET_CODE (IN) == REG || GET_CODE (IN) == SUBREG) \
        !           626:              && true_regnum (IN) == -1))) ? GENERAL_REGS : NO_REGS)
        !           627: 
        !           628: #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, IN)         \
        !           629:   ((CLASS) == FP_REGS && ((MODE) == HImode || (MODE) == QImode)        \
        !           630:    && (GET_CODE (IN) == MEM                                    \
        !           631:        || ((GET_CODE (IN) == REG || GET_CODE (IN) == SUBREG)   \
        !           632:           && true_regnum (IN) == -1)) ? GENERAL_REGS : NO_REGS)
        !           633: 
        !           634: /* On SPARC it is not possible to directly move data between 
        !           635:    GENERAL_REGS and FP_REGS.  */
        !           636: #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, MODE)  \
        !           637:   (((CLASS1) == FP_REGS && (CLASS2) == GENERAL_REGS)   \
        !           638:    || ((CLASS1) == GENERAL_REGS && (CLASS2) == FP_REGS))
        !           639: 
        !           640: /* Return the stack location to use for secondary memory needed reloads.  */
        !           641: #define SECONDARY_MEMORY_NEEDED_RTX(MODE) \
        !           642:   gen_rtx (MEM, MODE, gen_rtx (PLUS, Pmode, frame_pointer_rtx, GEN_INT (-8)))
        !           643: 
        !           644: /* Return the maximum number of consecutive registers
        !           645:    needed to represent mode MODE in a register of class CLASS.  */
        !           646: /* On SPARC, this is the size of MODE in words.  */
        !           647: #define CLASS_MAX_NREGS(CLASS, MODE)   \
        !           648:   ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
        !           649: 
        !           650: /* Stack layout; function entry, exit and calling.  */
        !           651: 
        !           652: /* Define the number of register that can hold parameters.
        !           653:    These two macros are used only in other macro definitions below.  */
        !           654: #define NPARM_REGS 6
        !           655: 
        !           656: /* Define this if pushing a word on the stack
        !           657:    makes the stack pointer a smaller address.  */
        !           658: #define STACK_GROWS_DOWNWARD
        !           659: 
        !           660: /* Define this if the nominal address of the stack frame
        !           661:    is at the high-address end of the local variables;
        !           662:    that is, each additional local variable allocated
        !           663:    goes at a more negative offset in the frame.  */
        !           664: #define FRAME_GROWS_DOWNWARD
        !           665: 
        !           666: /* Offset within stack frame to start allocating local variables at.
        !           667:    If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
        !           668:    first local allocated.  Otherwise, it is the offset to the BEGINNING
        !           669:    of the first local allocated.  */
        !           670: #define STARTING_FRAME_OFFSET (-8)
        !           671: 
        !           672: /* If we generate an insn to push BYTES bytes,
        !           673:    this says how many the stack pointer really advances by.
        !           674:    On SPARC, don't define this because there are no push insns.  */
        !           675: /*  #define PUSH_ROUNDING(BYTES) */
        !           676: 
        !           677: /* Offset of first parameter from the argument pointer register value.
        !           678:    This is 64 for the ins and locals, plus 4 for the struct-return reg
        !           679:    even if this function isn't going to use it.  */
        !           680: #define FIRST_PARM_OFFSET(FNDECL) (STRUCT_VALUE_OFFSET + UNITS_PER_WORD)
        !           681: 
        !           682: /* When a parameter is passed in a register, stack space is still
        !           683:    allocated for it.  */
        !           684: #define REG_PARM_STACK_SPACE(DECL) (NPARM_REGS * UNITS_PER_WORD)
        !           685: 
        !           686: /* Keep the stack pointer constant throughout the function.
        !           687:    This is both an optimization and a necessity: longjmp
        !           688:    doesn't behave itself when the stack pointer moves within
        !           689:    the function!  */
        !           690: #define ACCUMULATE_OUTGOING_ARGS
        !           691: 
        !           692: /* Value is the number of bytes of arguments automatically
        !           693:    popped when returning from a subroutine call.
        !           694:    FUNTYPE is the data type of the function (as a tree),
        !           695:    or for a library call it is an identifier node for the subroutine name.
        !           696:    SIZE is the number of bytes of arguments passed on the stack.  */
        !           697: 
        !           698: #define RETURN_POPS_ARGS(FUNTYPE,SIZE) 0
        !           699: 
        !           700: /* Some subroutine macros specific to this machine.
        !           701:    When !TARGET_FPU, put float return values in the general registers,
        !           702:    since we don't have any fp registers.  */
        !           703: #define BASE_RETURN_VALUE_REG(MODE) \
        !           704:  (((MODE) == SFmode || (MODE) == DFmode) && TARGET_FPU ? 32 : 8)
        !           705: #define BASE_OUTGOING_VALUE_REG(MODE) \
        !           706:  (((MODE) == SFmode || (MODE) == DFmode) && TARGET_FPU ? 32    \
        !           707:   : (TARGET_FRW ? 8 : 24))
        !           708: #define BASE_PASSING_ARG_REG(MODE) (8)
        !           709: #define BASE_INCOMING_ARG_REG(MODE) (TARGET_FRW ? 8 : 24)
        !           710: 
        !           711: /* Define this macro if the target machine has "register windows".  This
        !           712:    C expression returns the register number as seen by the called function
        !           713:    corresponding to register number OUT as seen by the calling function.
        !           714:    Return OUT if register number OUT is not an outbound register.  */
        !           715: 
        !           716: #define INCOMING_REGNO(OUT) \
        !           717:  ((TARGET_FRW || (OUT) < 8 || (OUT) > 15) ? (OUT) : (OUT) + 16)
        !           718: 
        !           719: /* Define this macro if the target machine has "register windows".  This
        !           720:    C expression returns the register number as seen by the calling function
        !           721:    corresponding to register number IN as seen by the called function.
        !           722:    Return IN if register number IN is not an inbound register.  */
        !           723: 
        !           724: #define OUTGOING_REGNO(IN) \
        !           725:  ((TARGET_FRW || (IN) < 24 || (IN) > 31) ? (IN) : (IN) - 16)
        !           726: 
        !           727: /* Define how to find the value returned by a function.
        !           728:    VALTYPE is the data type of the value (as a tree).
        !           729:    If the precise function being called is known, FUNC is its FUNCTION_DECL;
        !           730:    otherwise, FUNC is 0.  */
        !           731: 
        !           732: /* On SPARC the value is found in the first "output" register.  */
        !           733: 
        !           734: #define FUNCTION_VALUE(VALTYPE, FUNC)  \
        !           735:   gen_rtx (REG, TYPE_MODE (VALTYPE), BASE_RETURN_VALUE_REG (TYPE_MODE (VALTYPE)))
        !           736: 
        !           737: /* But the called function leaves it in the first "input" register.  */
        !           738: 
        !           739: #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC)  \
        !           740:   gen_rtx (REG, TYPE_MODE (VALTYPE), BASE_OUTGOING_VALUE_REG (TYPE_MODE (VALTYPE)))
        !           741: 
        !           742: /* Define how to find the value returned by a library function
        !           743:    assuming the value has mode MODE.  */
        !           744: 
        !           745: #define LIBCALL_VALUE(MODE)    \
        !           746:   gen_rtx (REG, MODE, BASE_RETURN_VALUE_REG (MODE))
        !           747: 
        !           748: /* 1 if N is a possible register number for a function value
        !           749:    as seen by the caller.
        !           750:    On SPARC, the first "output" reg is used for integer values,
        !           751:    and the first floating point register is used for floating point values.  */
        !           752: 
        !           753: #define FUNCTION_VALUE_REGNO_P(N) ((N) == 8 || (N) == 32)
        !           754: 
        !           755: /* 1 if N is a possible register number for function argument passing.
        !           756:    On SPARC, these are the "output" registers.  */
        !           757: 
        !           758: #define FUNCTION_ARG_REGNO_P(N) ((N) < 14 && (N) > 7)
        !           759: 
        !           760: /* Define a data type for recording info about an argument list
        !           761:    during the scan of that argument list.  This data type should
        !           762:    hold all necessary information about the function itself
        !           763:    and about the args processed so far, enough to enable macros
        !           764:    such as FUNCTION_ARG to determine where the next arg should go.
        !           765: 
        !           766:    On SPARC, this is a single integer, which is a number of words
        !           767:    of arguments scanned so far (including the invisible argument,
        !           768:    if any, which holds the structure-value-address).
        !           769:    Thus 7 or more means all following args should go on the stack.  */
        !           770: 
        !           771: #define CUMULATIVE_ARGS int
        !           772: 
        !           773: #define ROUND_ADVANCE(SIZE)    \
        !           774:   ((SIZE + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
        !           775: 
        !           776: /* Initialize a variable CUM of type CUMULATIVE_ARGS
        !           777:    for a call to a function whose data type is FNTYPE.
        !           778:    For a library call, FNTYPE is 0.
        !           779: 
        !           780:    On SPARC, the offset always starts at 0: the first parm reg is always
        !           781:    the same reg.  */
        !           782: 
        !           783: #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME) ((CUM) = 0)
        !           784: 
        !           785: /* Update the data in CUM to advance over an argument
        !           786:    of mode MODE and data type TYPE.
        !           787:    (TYPE is null for libcalls where that information may not be available.)  */
        !           788: 
        !           789: #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)   \
        !           790:   ((CUM) += ((MODE) != BLKmode                         \
        !           791:             ? ROUND_ADVANCE (GET_MODE_SIZE (MODE))     \
        !           792:             : ROUND_ADVANCE (int_size_in_bytes (TYPE))))
        !           793: 
        !           794: /* Determine where to put an argument to a function.
        !           795:    Value is zero to push the argument on the stack,
        !           796:    or a hard register in which to store the argument.
        !           797: 
        !           798:    MODE is the argument's machine mode.
        !           799:    TYPE is the data type of the argument (as a tree).
        !           800:     This is null for libcalls where that information may
        !           801:     not be available.
        !           802:    CUM is a variable of type CUMULATIVE_ARGS which gives info about
        !           803:     the preceding args and about the function being called.
        !           804:    NAMED is nonzero if this argument is a named parameter
        !           805:     (otherwise it is an extra parameter matching an ellipsis).  */
        !           806: 
        !           807: /* On SPARC the first six args are normally in registers
        !           808:    and the rest are pushed.  Any arg that starts within the first 6 words
        !           809:    is at least partially passed in a register unless its data type forbids.  */
        !           810: 
        !           811: #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED)                           \
        !           812: ((CUM) < NPARM_REGS                                                    \
        !           813:  && ((TYPE)==0 || ! TREE_ADDRESSABLE ((tree)(TYPE)))                   \
        !           814:  && ((TYPE)==0 || (MODE) != BLKmode                                    \
        !           815:      || (TYPE_ALIGN ((TYPE)) % PARM_BOUNDARY == 0))                    \
        !           816:  ? gen_rtx (REG, (MODE), (BASE_PASSING_ARG_REG (MODE) + (CUM)))                \
        !           817:  : 0)
        !           818: 
        !           819: /* Define where a function finds its arguments.
        !           820:    This is different from FUNCTION_ARG because of register windows.  */
        !           821: 
        !           822: #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED)                  \
        !           823: ((CUM) < NPARM_REGS                                                    \
        !           824:  && ((TYPE)==0 || ! TREE_ADDRESSABLE ((tree)(TYPE)))                   \
        !           825:  && ((TYPE)==0 || (MODE) != BLKmode                                    \
        !           826:      || (TYPE_ALIGN ((TYPE)) % PARM_BOUNDARY == 0))                    \
        !           827:  ? gen_rtx (REG, (MODE), (BASE_INCOMING_ARG_REG (MODE) + (CUM)))       \
        !           828:  : 0)
        !           829: 
        !           830: /* For an arg passed partly in registers and partly in memory,
        !           831:    this is the number of registers used.
        !           832:    For args passed entirely in registers or entirely in memory, zero.
        !           833:    Any arg that starts in the first 6 regs but won't entirely fit in them
        !           834:    needs partial registers on the Sparc.  */
        !           835: 
        !           836: #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED)             \
        !           837:   ((CUM) < NPARM_REGS                                                  \
        !           838:     && ((TYPE)==0 || ! TREE_ADDRESSABLE ((tree)(TYPE)))                        \
        !           839:     && ((TYPE)==0 || (MODE) != BLKmode                                 \
        !           840:        || (TYPE_ALIGN ((TYPE)) % PARM_BOUNDARY == 0))                  \
        !           841:     && ((CUM) + ((MODE) == BLKmode                                     \
        !           842:                 ? ROUND_ADVANCE (int_size_in_bytes (TYPE))             \
        !           843:                 : ROUND_ADVANCE (GET_MODE_SIZE (MODE))) - NPARM_REGS > 0)\
        !           844:    ? (NPARM_REGS - (CUM))                                              \
        !           845:    : 0)
        !           846: 
        !           847: /* The SPARC ABI stipulates passing struct arguments (of any size) and
        !           848:    quad-precision floats by invisible reference.  */
        !           849: #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED)         \
        !           850:   ((TYPE && (TREE_CODE (TYPE) == RECORD_TYPE                           \
        !           851:            || TREE_CODE (TYPE) == UNION_TYPE))                         \
        !           852:    || (MODE == TFmode))
        !           853: 
        !           854: /* Define the information needed to generate branch and scc insns.  This is
        !           855:    stored from the compare operation.  Note that we can't use "rtx" here
        !           856:    since it hasn't been defined!  */
        !           857: 
        !           858: extern struct rtx_def *sparc_compare_op0, *sparc_compare_op1;
        !           859: 
        !           860: /* Define the function that build the compare insn for scc and bcc.  */
        !           861: 
        !           862: extern struct rtx_def *gen_compare_reg ();
        !           863: 
        !           864: /* Generate the special assembly code needed to tell the assembler whatever
        !           865:    it might need to know about the return value of a function.
        !           866: 
        !           867:    For Sparc assemblers, we need to output a .proc pseudo-op which conveys
        !           868:    information to the assembler relating to peephole optimization (done in
        !           869:    the assembler).  */
        !           870: 
        !           871: #define ASM_DECLARE_RESULT(FILE, RESULT) \
        !           872:   fprintf ((FILE), "\t.proc\t0%o\n", sparc_type_code (TREE_TYPE (RESULT)))
        !           873: 
        !           874: /* Output the label for a function definition.  */
        !           875: 
        !           876: #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                    \
        !           877: do {                                                                   \
        !           878:   ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));                       \
        !           879:   ASM_OUTPUT_LABEL (FILE, NAME);                                       \
        !           880: } while (0)
        !           881: 
        !           882: /* Two views of the size of the current frame.  */
        !           883: extern int actual_fsize;
        !           884: extern int apparent_fsize;
        !           885: 
        !           886: /* This macro generates the assembly code for function entry.
        !           887:    FILE is a stdio stream to output the code to.
        !           888:    SIZE is an int: how many units of temporary storage to allocate.
        !           889:    Refer to the array `regs_ever_live' to determine which registers
        !           890:    to save; `regs_ever_live[I]' is nonzero if register number I
        !           891:    is ever used in the function.  This macro is responsible for
        !           892:    knowing which registers should not be saved even if used.  */
        !           893: 
        !           894: /* On SPARC, move-double insns between fpu and cpu need an 8-byte block
        !           895:    of memory.  If any fpu reg is used in the function, we allocate
        !           896:    such a block here, at the bottom of the frame, just in case it's needed.
        !           897: 
        !           898:    If this function is a leaf procedure, then we may choose not
        !           899:    to do a "save" insn.  The decision about whether or not
        !           900:    to do this is made in regclass.c.  */
        !           901: 
        !           902: #define FUNCTION_PROLOGUE(FILE, SIZE)                          \
        !           903:   (TARGET_FRW ? sparc_frw_output_function_prologue (FILE, SIZE, leaf_function)\
        !           904:    : output_function_prologue (FILE, SIZE, leaf_function))
        !           905: 
        !           906: /* Output assembler code to FILE to increment profiler label # LABELNO
        !           907:    for profiling a function entry.  */
        !           908: 
        !           909: #define FUNCTION_PROFILER(FILE, LABELNO)                       \
        !           910:   do {                                                         \
        !           911:     fputs ("\tsethi %hi(", (FILE));                            \
        !           912:     ASM_OUTPUT_INTERNAL_LABELREF (FILE, "LP", LABELNO);                \
        !           913:     fputs ("),%o0\n\tcall mcount\n\tor %lo(", (FILE));         \
        !           914:     ASM_OUTPUT_INTERNAL_LABELREF (FILE, "LP", LABELNO);                \
        !           915:     fputs ("),%o0,%o0\n", (FILE));                             \
        !           916:   } while (0)
        !           917: 
        !           918: /* Output assembler code to FILE to initialize this source file's
        !           919:    basic block profiling info, if that has not already been done.  */
        !           920: /* FIXME -- this does not parameterize how it generates labels (like the
        !           921:    above FUNCTION_PROFILER).  Broken on Solaris-2.   [email protected] */
        !           922: 
        !           923: #define FUNCTION_BLOCK_PROFILER(FILE, LABELNO)  \
        !           924:   fprintf (FILE, "\tsethi %%hi(LPBX0),%%o0\n\tld [%%lo(LPBX0)+%%o0],%%o1\n\ttst %%o1\n\tbne LPY%d\n\tadd %%o0,%%lo(LPBX0),%%o0\n\tcall ___bb_init_func\n\tnop\nLPY%d:\n",  \
        !           925:           (LABELNO), (LABELNO))
        !           926: 
        !           927: /* Output assembler code to FILE to increment the entry-count for
        !           928:    the BLOCKNO'th basic block in this source file.  */
        !           929: 
        !           930: #define BLOCK_PROFILER(FILE, BLOCKNO) \
        !           931: {                                                              \
        !           932:   int blockn = (BLOCKNO);                                      \
        !           933:   fprintf (FILE, "\tsethi %%hi(LPBX2+%d),%%g1\n\tld [%%lo(LPBX2+%d)+%%g1],%%g2\n\
        !           934: \tadd %%g2,1,%%g2\n\tst %%g2,[%%lo(LPBX2+%d)+%%g1]\n",         \
        !           935:           4 * blockn, 4 * blockn, 4 * blockn);                 \
        !           936: }
        !           937: 
        !           938: /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
        !           939:    the stack pointer does not matter.  The value is tested only in
        !           940:    functions that have frame pointers.
        !           941:    No definition is equivalent to always zero.  */
        !           942: 
        !           943: extern int current_function_calls_alloca;
        !           944: extern int current_function_outgoing_args_size;
        !           945: 
        !           946: #define EXIT_IGNORE_STACK      \
        !           947:  (get_frame_size () != 0       \
        !           948:   || current_function_calls_alloca || current_function_outgoing_args_size)
        !           949: 
        !           950: /* This macro generates the assembly code for function exit,
        !           951:    on machines that need it.  If FUNCTION_EPILOGUE is not defined
        !           952:    then individual return instructions are generated for each
        !           953:    return statement.  Args are same as for FUNCTION_PROLOGUE.
        !           954: 
        !           955:    The function epilogue should not depend on the current stack pointer!
        !           956:    It should use the frame pointer only.  This is mandatory because
        !           957:    of alloca; we also take advantage of it to omit stack adjustments
        !           958:    before returning.  */
        !           959: 
        !           960: /* This declaration is needed due to traditional/ANSI
        !           961:    incompatibilities which cannot be #ifdefed away
        !           962:    because they occur inside of macros.  Sigh.  */
        !           963: extern union tree_node *current_function_decl;
        !           964: 
        !           965: #define FUNCTION_EPILOGUE(FILE, SIZE)                          \
        !           966:   (TARGET_FRW ? sparc_frw_output_function_epilogue (FILE, SIZE, leaf_function)\
        !           967:    : output_function_epilogue (FILE, SIZE, leaf_function))
        !           968: 
        !           969: #define DELAY_SLOTS_FOR_EPILOGUE       \
        !           970:   (TARGET_FRW ? sparc_frw_epilogue_delay_slots () : 1)
        !           971: #define ELIGIBLE_FOR_EPILOGUE_DELAY(trial, slots_filled)       \
        !           972:   (TARGET_FRW ? sparc_frw_eligible_for_epilogue_delay (trial, slots_filled) \
        !           973:    : eligible_for_epilogue_delay (trial, slots_filled))
        !           974: 
        !           975: /* Output assembler code for a block containing the constant parts
        !           976:    of a trampoline, leaving space for the variable parts.  */
        !           977: 
        !           978: /* On the sparc, the trampoline contains five instructions:
        !           979:      sethi #TOP_OF_FUNCTION,%g2
        !           980:      or #BOTTOM_OF_FUNCTION,%g2,%g2
        !           981:      sethi #TOP_OF_STATIC,%g1
        !           982:      jmp g2
        !           983:      or #BOTTOM_OF_STATIC,%g1,%g1  */
        !           984: #define TRAMPOLINE_TEMPLATE(FILE)                                      \
        !           985: {                                                                      \
        !           986:   ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x00000000));    \
        !           987:   ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x00000000));    \
        !           988:   ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x00000000));    \
        !           989:   ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x81C08000));    \
        !           990:   ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x00000000));    \
        !           991: }
        !           992: 
        !           993: /* Length in units of the trampoline for entering a nested function.  */
        !           994: 
        !           995: #define TRAMPOLINE_SIZE 20
        !           996: 
        !           997: /* Emit RTL insns to initialize the variable parts of a trampoline.
        !           998:    FNADDR is an RTX for the address of the function's pure code.
        !           999:    CXT is an RTX for the static chain value for the function.
        !          1000: 
        !          1001:    This takes 16 insns: 2 shifts & 2 ands (to split up addresses), 4 sethi
        !          1002:    (to load in opcodes), 4 iors (to merge address and opcodes), and 4 writes
        !          1003:    (to store insns).  This is a bit excessive.  Perhaps a different
        !          1004:    mechanism would be better here.  */
        !          1005: 
        !          1006: #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)                      \
        !          1007: {                                                                      \
        !          1008:   rtx high_cxt = expand_shift (RSHIFT_EXPR, SImode, CXT,               \
        !          1009:                              size_int (10), 0, 1);                     \
        !          1010:   rtx high_fn = expand_shift (RSHIFT_EXPR, SImode, FNADDR,             \
        !          1011:                             size_int (10), 0, 1);                      \
        !          1012:   rtx low_cxt = expand_and (CXT, gen_rtx (CONST_INT, VOIDmode, 0x3ff), 0); \
        !          1013:   rtx low_fn = expand_and (FNADDR, gen_rtx (CONST_INT, VOIDmode, 0x3ff), 0); \
        !          1014:   rtx g1_sethi = gen_rtx (HIGH, SImode,                                        \
        !          1015:                          gen_rtx (CONST_INT, VOIDmode, 0x03000000));   \
        !          1016:   rtx g2_sethi = gen_rtx (HIGH, SImode,                                        \
        !          1017:                          gen_rtx (CONST_INT, VOIDmode, 0x05000000));   \
        !          1018:   rtx g1_ori = gen_rtx (HIGH, SImode,                                  \
        !          1019:                        gen_rtx (CONST_INT, VOIDmode, 0x82106000));     \
        !          1020:   rtx g2_ori = gen_rtx (HIGH, SImode,                                  \
        !          1021:                        gen_rtx (CONST_INT, VOIDmode, 0x8410A000));     \
        !          1022:   rtx tem = gen_reg_rtx (SImode);                                      \
        !          1023:   emit_move_insn (tem, g2_sethi);                                      \
        !          1024:   emit_insn (gen_iorsi3 (high_fn, high_fn, tem));                      \
        !          1025:   emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 0)), high_fn);\
        !          1026:   emit_move_insn (tem, g2_ori);                                                \
        !          1027:   emit_insn (gen_iorsi3 (low_fn, low_fn, tem));                                \
        !          1028:   emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 4)), low_fn);\
        !          1029:   emit_move_insn (tem, g1_sethi);                                      \
        !          1030:   emit_insn (gen_iorsi3 (high_cxt, high_cxt, tem));                    \
        !          1031:   emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 8)), high_cxt);\
        !          1032:   emit_move_insn (tem, g1_ori);                                                \
        !          1033:   emit_insn (gen_iorsi3 (low_cxt, low_cxt, tem));                      \
        !          1034:   emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 16)), low_cxt);\
        !          1035: }
        !          1036: 
        !          1037: /* Generate necessary RTL for __builtin_saveregs().
        !          1038:    ARGLIST is the argument list; see expr.c.  */
        !          1039: extern struct rtx_def *sparc_builtin_saveregs ();
        !          1040: #define EXPAND_BUILTIN_SAVEREGS(ARGLIST) sparc_builtin_saveregs (ARGLIST)
        !          1041: 
        !          1042: /* Generate RTL to flush the register windows so as to make arbitrary frames
        !          1043:    available.  */
        !          1044: #define SETUP_FRAME_ADDRESSES()                \
        !          1045:   emit_insn (gen_flush_register_windows ())
        !          1046: 
        !          1047: /* Given an rtx for the address of a frame,
        !          1048:    return an rtx for the address of the word in the frame
        !          1049:    that holds the dynamic chain--the previous frame's address.  */
        !          1050: #define DYNAMIC_CHAIN_ADDRESS(frame) \
        !          1051:   gen_rtx (PLUS, Pmode, frame, gen_rtx (CONST_INT, VOIDmode, 56))
        !          1052: 
        !          1053: /* The return address isn't on the stack, it is in a register, so we can't
        !          1054:    access it from the current frame pointer.  We can access it from the
        !          1055:    previous frame pointer though by reading a value from the register window
        !          1056:    save area.  */
        !          1057: #define RETURN_ADDR_IN_PREVIOUS_FRAME
        !          1058: 
        !          1059: /* The current return address is in %i7.  The return address of anything
        !          1060:    farther back is in the register window save area at [%fp+60].  */
        !          1061: /* ??? This ignores the fact that the actual return address is +8 for normal
        !          1062:    returns, and +12 for structure returns.  */
        !          1063: #define RETURN_ADDR_RTX(count, frame)          \
        !          1064:   ((count == -1)                               \
        !          1065:    ? gen_rtx (REG, Pmode, 31)                  \
        !          1066:    : copy_to_reg (gen_rtx (MEM, Pmode,         \
        !          1067:                           memory_address (Pmode, plus_constant (frame, 60)))))
        !          1068: 
        !          1069: /* Addressing modes, and classification of registers for them.  */
        !          1070: 
        !          1071: /* #define HAVE_POST_INCREMENT */
        !          1072: /* #define HAVE_POST_DECREMENT */
        !          1073: 
        !          1074: /* #define HAVE_PRE_DECREMENT */
        !          1075: /* #define HAVE_PRE_INCREMENT */
        !          1076: 
        !          1077: /* Macros to check register numbers against specific register classes.  */
        !          1078: 
        !          1079: /* These assume that REGNO is a hard or pseudo reg number.
        !          1080:    They give nonzero only if REGNO is a hard reg of the suitable class
        !          1081:    or a pseudo reg currently allocated to a suitable hard reg.
        !          1082:    Since they use reg_renumber, they are safe only once reg_renumber
        !          1083:    has been allocated, which happens in local-alloc.c.  */
        !          1084: 
        !          1085: #define REGNO_OK_FOR_INDEX_P(REGNO) \
        !          1086: (((REGNO) < 32 || (unsigned) reg_renumber[REGNO] < 32) && (REGNO) != 0)
        !          1087: #define REGNO_OK_FOR_BASE_P(REGNO) \
        !          1088: (((REGNO) < 32 || (unsigned) reg_renumber[REGNO] < 32) && (REGNO) != 0)
        !          1089: #define REGNO_OK_FOR_FP_P(REGNO) \
        !          1090: (((REGNO) ^ 0x20) < 32 \
        !          1091:  || (((REGNO) != 0) && (unsigned) (reg_renumber[REGNO] ^ 0x20) < 32))
        !          1092: 
        !          1093: /* Now macros that check whether X is a register and also,
        !          1094:    strictly, whether it is in a specified class.
        !          1095: 
        !          1096:    These macros are specific to the SPARC, and may be used only
        !          1097:    in code for printing assembler insns and in conditions for
        !          1098:    define_optimization.  */
        !          1099: 
        !          1100: /* 1 if X is an fp register.  */
        !          1101: 
        !          1102: #define FP_REG_P(X) (REG_P (X) && REGNO_OK_FOR_FP_P (REGNO (X)))
        !          1103: 
        !          1104: /* Maximum number of registers that can appear in a valid memory address.  */
        !          1105: 
        !          1106: #define MAX_REGS_PER_ADDRESS 2
        !          1107: 
        !          1108: /* Recognize any constant value that is a valid address.  */
        !          1109: 
        !          1110: #define CONSTANT_ADDRESS_P(X)   \
        !          1111:   (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF             \
        !          1112:    || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST               \
        !          1113:    || GET_CODE (X) == HIGH)
        !          1114: 
        !          1115: /* Nonzero if the constant value X is a legitimate general operand.
        !          1116:    Anything can be made to work except floating point constants.  */
        !          1117: 
        !          1118: #define LEGITIMATE_CONSTANT_P(X) \
        !          1119:   (GET_CODE (X) != CONST_DOUBLE || GET_MODE (X) == VOIDmode)
        !          1120: 
        !          1121: /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
        !          1122:    and check its validity for a certain class.
        !          1123:    We have two alternate definitions for each of them.
        !          1124:    The usual definition accepts all pseudo regs; the other rejects
        !          1125:    them unless they have been allocated suitable hard regs.
        !          1126:    The symbol REG_OK_STRICT causes the latter definition to be used.
        !          1127: 
        !          1128:    Most source files want to accept pseudo regs in the hope that
        !          1129:    they will get allocated to the class that the insn wants them to be in.
        !          1130:    Source files for reload pass need to be strict.
        !          1131:    After reload, it makes no difference, since pseudo regs have
        !          1132:    been eliminated by then.  */
        !          1133: 
        !          1134: /* Optional extra constraints for this machine.  Borrowed from romp.h.
        !          1135: 
        !          1136:    For the SPARC, `Q' means that this is a memory operand but not a
        !          1137:    symbolic memory operand.  Note that an unassigned pseudo register
        !          1138:    is such a memory operand.  Needed because reload will generate
        !          1139:    these things in insns and then not re-recognize the insns, causing
        !          1140:    constrain_operands to fail.
        !          1141: 
        !          1142:    `S' handles constraints for calls.  */
        !          1143: 
        !          1144: #ifndef REG_OK_STRICT
        !          1145: 
        !          1146: /* Nonzero if X is a hard reg that can be used as an index
        !          1147:    or if it is a pseudo reg.  */
        !          1148: #define REG_OK_FOR_INDEX_P(X) (((unsigned) REGNO (X)) - 32 >= 32 && REGNO (X) != 0)
        !          1149: /* Nonzero if X is a hard reg that can be used as a base reg
        !          1150:    or if it is a pseudo reg.  */
        !          1151: #define REG_OK_FOR_BASE_P(X) (((unsigned) REGNO (X)) - 32 >= 32 && REGNO (X) != 0)
        !          1152: 
        !          1153: #define EXTRA_CONSTRAINT(OP, C)                                \
        !          1154:   ((C) == 'Q'                                          \
        !          1155:    ? ((GET_CODE (OP) == MEM                            \
        !          1156:        && memory_address_p (GET_MODE (OP), XEXP (OP, 0))       \
        !          1157:        && ! symbolic_memory_operand (OP, VOIDmode))    \
        !          1158:       || (reload_in_progress && GET_CODE (OP) == REG   \
        !          1159:          && REGNO (OP) >= FIRST_PSEUDO_REGISTER))      \
        !          1160:    : (C) == 'S'                                                \
        !          1161:    ? (CONSTANT_P (OP) || memory_address_p (Pmode, OP)) \
        !          1162:    : (C) == 'T'                                                \
        !          1163:    ? (mem_aligned_8 (OP))                              \
        !          1164:    : (C) == 'U'                                                \
        !          1165:    ? (register_ok_for_ldd (OP))                                \
        !          1166:    : 0)
        !          1167:  
        !          1168: #else
        !          1169: 
        !          1170: /* Nonzero if X is a hard reg that can be used as an index.  */
        !          1171: #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
        !          1172: /* Nonzero if X is a hard reg that can be used as a base reg.  */
        !          1173: #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
        !          1174: 
        !          1175: #define EXTRA_CONSTRAINT(OP, C)                                \
        !          1176:   ((C) == 'Q'                                          \
        !          1177:    ? (GET_CODE (OP) == REG                             \
        !          1178:       ? (REGNO (OP) >= FIRST_PSEUDO_REGISTER           \
        !          1179:         && reg_renumber[REGNO (OP)] < 0)               \
        !          1180:       : GET_CODE (OP) == MEM)                          \
        !          1181:    : (C) == 'S'                                                \
        !          1182:    ? (CONSTANT_P (OP)                                  \
        !          1183:       || (GET_CODE (OP) == REG && reg_renumber[REGNO (OP)] > 0) \
        !          1184:       || strict_memory_address_p (Pmode, OP))          \
        !          1185:    : (C) == 'T'                                                \
        !          1186:    ? mem_aligned_8 (OP) && strict_memory_address_p (Pmode, OP) \
        !          1187:    : (C) == 'U'                                                \
        !          1188:    ? register_ok_for_ldd (OP) : 0)
        !          1189: #endif
        !          1190: 
        !          1191: /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
        !          1192:    that is a valid memory address for an instruction.
        !          1193:    The MODE argument is the machine mode for the MEM expression
        !          1194:    that wants to use this address.
        !          1195: 
        !          1196:    On SPARC, the actual legitimate addresses must be REG+REG or REG+SMALLINT
        !          1197:    ordinarily.  This changes a bit when generating PIC.
        !          1198: 
        !          1199:    If you change this, execute "rm explow.o recog.o reload.o".  */
        !          1200: 
        !          1201: #define RTX_OK_FOR_BASE_P(X)                                           \
        !          1202:   ((GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X))                      \
        !          1203:   || (GET_CODE (X) == SUBREG                                           \
        !          1204:       && GET_CODE (SUBREG_REG (X)) == REG                              \
        !          1205:       && REG_OK_FOR_BASE_P (SUBREG_REG (X))))
        !          1206: 
        !          1207: #define RTX_OK_FOR_INDEX_P(X)                                          \
        !          1208:   ((GET_CODE (X) == REG && REG_OK_FOR_INDEX_P (X))                     \
        !          1209:   || (GET_CODE (X) == SUBREG                                           \
        !          1210:       && GET_CODE (SUBREG_REG (X)) == REG                              \
        !          1211:       && REG_OK_FOR_INDEX_P (SUBREG_REG (X))))
        !          1212: 
        !          1213: #define RTX_OK_FOR_OFFSET_P(X)                                         \
        !          1214:   (GET_CODE (X) == CONST_INT && INTVAL (X) >= -0x1000 && INTVAL (X) < 0x1000)
        !          1215: 
        !          1216: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR)                \
        !          1217: { if (RTX_OK_FOR_BASE_P (X))                           \
        !          1218:     goto ADDR;                                         \
        !          1219:   else if (GET_CODE (X) == PLUS)                       \
        !          1220:     {                                                  \
        !          1221:       register rtx op0 = XEXP (X, 0);                  \
        !          1222:       register rtx op1 = XEXP (X, 1);                  \
        !          1223:       if (flag_pic && op0 == pic_offset_table_rtx)     \
        !          1224:        {                                               \
        !          1225:          if (RTX_OK_FOR_BASE_P (op1))                  \
        !          1226:            goto ADDR;                                  \
        !          1227:          else if (flag_pic == 1                        \
        !          1228:                   && GET_CODE (op1) != REG             \
        !          1229:                   && GET_CODE (op1) != LO_SUM          \
        !          1230:                   && GET_CODE (op1) != MEM)            \
        !          1231:            goto ADDR;                                  \
        !          1232:        }                                               \
        !          1233:       else if (RTX_OK_FOR_BASE_P (op0))                        \
        !          1234:        {                                               \
        !          1235:          if (RTX_OK_FOR_INDEX_P (op1)                  \
        !          1236:              || RTX_OK_FOR_OFFSET_P (op1))             \
        !          1237:            goto ADDR;                                  \
        !          1238:        }                                               \
        !          1239:       else if (RTX_OK_FOR_BASE_P (op1))                        \
        !          1240:        {                                               \
        !          1241:          if (RTX_OK_FOR_INDEX_P (op0)                  \
        !          1242:              || RTX_OK_FOR_OFFSET_P (op0))             \
        !          1243:            goto ADDR;                                  \
        !          1244:        }                                               \
        !          1245:     }                                                  \
        !          1246:   else if (GET_CODE (X) == LO_SUM)                     \
        !          1247:     {                                                  \
        !          1248:       register rtx op0 = XEXP (X, 0);                  \
        !          1249:       register rtx op1 = XEXP (X, 1);                  \
        !          1250:       if (RTX_OK_FOR_BASE_P (op0)                      \
        !          1251:          && CONSTANT_P (op1))                          \
        !          1252:        goto ADDR;                                      \
        !          1253:     }                                                  \
        !          1254:   else if (GET_CODE (X) == CONST_INT && SMALL_INT (X)) \
        !          1255:     goto ADDR;                                         \
        !          1256: }
        !          1257: 
        !          1258: /* Try machine-dependent ways of modifying an illegitimate address
        !          1259:    to be legitimate.  If we find one, return the new, valid address.
        !          1260:    This macro is used in only one place: `memory_address' in explow.c.
        !          1261: 
        !          1262:    OLDX is the address as it was before break_out_memory_refs was called.
        !          1263:    In some cases it is useful to look at this to decide what needs to be done.
        !          1264: 
        !          1265:    MODE and WIN are passed so that this macro can use
        !          1266:    GO_IF_LEGITIMATE_ADDRESS.
        !          1267: 
        !          1268:    It is always safe for this macro to do nothing.  It exists to recognize
        !          1269:    opportunities to optimize the output.  */
        !          1270: 
        !          1271: /* On SPARC, change REG+N into REG+REG, and REG+(X*Y) into REG+REG.  */
        !          1272: extern struct rtx_def *legitimize_pic_address ();
        !          1273: #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN)    \
        !          1274: { rtx sparc_x = (X);                                           \
        !          1275:   if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == MULT)  \
        !          1276:     (X) = gen_rtx (PLUS, Pmode, XEXP (X, 1),                   \
        !          1277:                   force_operand (XEXP (X, 0), NULL_RTX));      \
        !          1278:   if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 1)) == MULT)  \
        !          1279:     (X) = gen_rtx (PLUS, Pmode, XEXP (X, 0),                   \
        !          1280:                   force_operand (XEXP (X, 1), NULL_RTX));      \
        !          1281:   if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == PLUS)  \
        !          1282:     (X) = gen_rtx (PLUS, Pmode, force_operand (XEXP (X, 0), NULL_RTX),\
        !          1283:                   XEXP (X, 1));                                \
        !          1284:   if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 1)) == PLUS)  \
        !          1285:     (X) = gen_rtx (PLUS, Pmode, XEXP (X, 0),                   \
        !          1286:                   force_operand (XEXP (X, 1), NULL_RTX));      \
        !          1287:   if (sparc_x != (X) && memory_address_p (MODE, X))            \
        !          1288:     goto WIN;                                                  \
        !          1289:   if (flag_pic) (X) = legitimize_pic_address (X, MODE, 0, 0);  \
        !          1290:   else if (GET_CODE (X) == PLUS && CONSTANT_ADDRESS_P (XEXP (X, 1)))   \
        !          1291:     (X) = gen_rtx (PLUS, Pmode, XEXP (X, 0),                   \
        !          1292:                   copy_to_mode_reg (Pmode, XEXP (X, 1)));      \
        !          1293:   else if (GET_CODE (X) == PLUS && CONSTANT_ADDRESS_P (XEXP (X, 0)))   \
        !          1294:     (X) = gen_rtx (PLUS, Pmode, XEXP (X, 1),                   \
        !          1295:                   copy_to_mode_reg (Pmode, XEXP (X, 0)));      \
        !          1296:   else if (GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == CONST \
        !          1297:           || GET_CODE (X) == LABEL_REF)                        \
        !          1298:     (X) = gen_rtx (LO_SUM, Pmode,                              \
        !          1299:                   copy_to_mode_reg (Pmode, gen_rtx (HIGH, Pmode, X)), X); \
        !          1300:   if (memory_address_p (MODE, X))                              \
        !          1301:     goto WIN; }
        !          1302: 
        !          1303: /* Go to LABEL if ADDR (a legitimate address expression)
        !          1304:    has an effect that depends on the machine mode it is used for.
        !          1305:    On the SPARC this is never true.  */
        !          1306: 
        !          1307: #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)
        !          1308: 
        !          1309: /* Specify the machine mode that this machine uses
        !          1310:    for the index in the tablejump instruction.  */
        !          1311: #define CASE_VECTOR_MODE SImode
        !          1312: 
        !          1313: /* Define this if the tablejump instruction expects the table
        !          1314:    to contain offsets from the address of the table.
        !          1315:    Do not define this if the table should contain absolute addresses.  */
        !          1316: /* #define CASE_VECTOR_PC_RELATIVE */
        !          1317: 
        !          1318: /* Specify the tree operation to be used to convert reals to integers.  */
        !          1319: #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
        !          1320: 
        !          1321: /* This is the kind of divide that is easiest to do in the general case.  */
        !          1322: #define EASY_DIV_EXPR TRUNC_DIV_EXPR
        !          1323: 
        !          1324: /* Define this as 1 if `char' should by default be signed; else as 0.  */
        !          1325: #define DEFAULT_SIGNED_CHAR 1
        !          1326: 
        !          1327: /* Max number of bytes we can move from memory to memory
        !          1328:    in one reasonably fast instruction.  */
        !          1329: #define MOVE_MAX 8
        !          1330: 
        !          1331: #if 0 /* Sun 4 has matherr, so this is no good.  */
        !          1332: /* This is the value of the error code EDOM for this machine,
        !          1333:    used by the sqrt instruction.  */
        !          1334: #define TARGET_EDOM 33
        !          1335: 
        !          1336: /* This is how to refer to the variable errno.  */
        !          1337: #define GEN_ERRNO_RTX \
        !          1338:   gen_rtx (MEM, SImode, gen_rtx (SYMBOL_REF, Pmode, "errno"))
        !          1339: #endif /* 0 */
        !          1340: 
        !          1341: /* Define if normal loads of shorter-than-word items from memory clears
        !          1342:    the rest of the bigs in the register.  */
        !          1343: #define BYTE_LOADS_ZERO_EXTEND
        !          1344: 
        !          1345: /* Nonzero if access to memory by bytes is slow and undesirable.
        !          1346:    For RISC chips, it means that access to memory by bytes is no
        !          1347:    better than access by words when possible, so grab a whole word
        !          1348:    and maybe make use of that.  */
        !          1349: #define SLOW_BYTE_ACCESS 1
        !          1350: 
        !          1351: /* We assume that the store-condition-codes instructions store 0 for false
        !          1352:    and some other value for true.  This is the value stored for true.  */
        !          1353: 
        !          1354: #define STORE_FLAG_VALUE 1
        !          1355: 
        !          1356: /* When a prototype says `char' or `short', really pass an `int'.  */
        !          1357: #define PROMOTE_PROTOTYPES
        !          1358: 
        !          1359: /* Define if shifts truncate the shift count
        !          1360:    which implies one can omit a sign-extension or zero-extension
        !          1361:    of a shift count.  */
        !          1362: #define SHIFT_COUNT_TRUNCATED
        !          1363: 
        !          1364: /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
        !          1365:    is done just by pretending it is already truncated.  */
        !          1366: #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
        !          1367: 
        !          1368: /* Specify the machine mode that pointers have.
        !          1369:    After generation of rtl, the compiler makes no further distinction
        !          1370:    between pointers and any other objects of this machine mode.  */
        !          1371: #define Pmode SImode
        !          1372: 
        !          1373: /* Generate calls to memcpy, memcmp and memset.  */
        !          1374: #define TARGET_MEM_FUNCTIONS
        !          1375: 
        !          1376: /* Add any extra modes needed to represent the condition code.
        !          1377: 
        !          1378:    On the Sparc, we have a "no-overflow" mode which is used when an add or
        !          1379:    subtract insn is used to set the condition code.  Different branches are
        !          1380:    used in this case for some operations.
        !          1381: 
        !          1382:    We also have two modes to indicate that the relevant condition code is
        !          1383:    in the floating-point condition code register.  One for comparisons which
        !          1384:    will generate an exception if the result is unordered (CCFPEmode) and
        !          1385:    one for comparisons which will never trap (CCFPmode).  This really should
        !          1386:    be a separate register, but we don't want to go to 65 registers.  */
        !          1387: #define EXTRA_CC_MODES CC_NOOVmode, CCFPmode, CCFPEmode
        !          1388: 
        !          1389: /* Define the names for the modes specified above.  */
        !          1390: #define EXTRA_CC_NAMES "CC_NOOV", "CCFP", "CCFPE"
        !          1391: 
        !          1392: /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE,
        !          1393:    return the mode to be used for the comparison.  For floating-point,
        !          1394:    CCFP[E]mode is used.  CC_NOOVmode should be used when the first operand is a
        !          1395:    PLUS, MINUS, or NEG.  CCmode should be used when no special processing is
        !          1396:    needed.  */
        !          1397: #define SELECT_CC_MODE(OP,X,Y) \
        !          1398:   (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT                         \
        !          1399:    ? ((OP == EQ || OP == NE) ? CCFPmode : CCFPEmode)           \
        !          1400:    : ((GET_CODE (X) == PLUS || GET_CODE (X) == MINUS || GET_CODE (X) == NEG) \
        !          1401:       ? CC_NOOVmode : CCmode))
        !          1402: 
        !          1403: /* A function address in a call instruction
        !          1404:    is a byte address (for indexing purposes)
        !          1405:    so give the MEM rtx a byte's mode.  */
        !          1406: #define FUNCTION_MODE SImode
        !          1407: 
        !          1408: /* Define this if addresses of constant functions
        !          1409:    shouldn't be put through pseudo regs where they can be cse'd.
        !          1410:    Desirable on machines where ordinary constants are expensive
        !          1411:    but a CALL with constant address is cheap.  */
        !          1412: #define NO_FUNCTION_CSE
        !          1413: 
        !          1414: /* alloca should avoid clobbering the old register save area.  */
        !          1415: #define SETJMP_VIA_SAVE_AREA
        !          1416: 
        !          1417: /* Define subroutines to call to handle multiply and divide.
        !          1418:    Use the subroutines that Sun's library provides.
        !          1419:    The `*' prevents an underscore from being prepended by the compiler.  */
        !          1420: 
        !          1421: #define DIVSI3_LIBCALL "*.div"
        !          1422: #define UDIVSI3_LIBCALL "*.udiv"
        !          1423: #define MODSI3_LIBCALL "*.rem"
        !          1424: #define UMODSI3_LIBCALL "*.urem"
        !          1425: /* .umul is a little faster than .mul.  */
        !          1426: #define MULSI3_LIBCALL "*.umul"
        !          1427: 
        !          1428: /* Compute the cost of computing a constant rtl expression RTX
        !          1429:    whose rtx-code is CODE.  The body of this macro is a portion
        !          1430:    of a switch statement.  If the code is computed here,
        !          1431:    return it with a return statement.  Otherwise, break from the switch.  */
        !          1432: 
        !          1433: #define CONST_COSTS(RTX,CODE,OUTER_CODE) \
        !          1434:   case CONST_INT:                                              \
        !          1435:     if (INTVAL (RTX) < 0x1000 && INTVAL (RTX) >= -0x1000)      \
        !          1436:       return 0;                                                        \
        !          1437:   case HIGH:                                                   \
        !          1438:     return 2;                                                  \
        !          1439:   case CONST:                                                  \
        !          1440:   case LABEL_REF:                                              \
        !          1441:   case SYMBOL_REF:                                             \
        !          1442:     return 4;                                                  \
        !          1443:   case CONST_DOUBLE:                                           \
        !          1444:     if (GET_MODE (RTX) == DImode)                              \
        !          1445:       if ((XINT (RTX, 3) == 0                                  \
        !          1446:           && (unsigned) XINT (RTX, 2) < 0x1000)                \
        !          1447:          || (XINT (RTX, 3) == -1                               \
        !          1448:              && XINT (RTX, 2) < 0                              \
        !          1449:              && XINT (RTX, 2) >= -0x1000))                     \
        !          1450:        return 0;                                               \
        !          1451:     return 8;
        !          1452: 
        !          1453: /* SPARC offers addressing modes which are "as cheap as a register".
        !          1454:    See sparc.c (or gcc.texinfo) for details.  */
        !          1455: 
        !          1456: #define ADDRESS_COST(RTX) \
        !          1457:   (GET_CODE (RTX) == REG ? 1 : sparc_address_cost (RTX))
        !          1458: 
        !          1459: /* Compute extra cost of moving data between one register class
        !          1460:    and another.  */
        !          1461: #define REGISTER_MOVE_COST(CLASS1, CLASS2) \
        !          1462:   (((CLASS1 == FP_REGS && CLASS2 == GENERAL_REGS) \
        !          1463:     || (CLASS1 == GENERAL_REGS && CLASS2 == FP_REGS)) ? 6 : 2)
        !          1464: 
        !          1465: /* Provide the costs of a rtl expression.  This is in the body of a
        !          1466:    switch on CODE.  The purpose for the cost of MULT is to encourage
        !          1467:    `synth_mult' to find a synthetic multiply when reasonable.
        !          1468: 
        !          1469:    If we need more than 12 insns to do a multiply, then go out-of-line,
        !          1470:    since the call overhead will be < 10% of the cost of the multiply.  */
        !          1471: 
        !          1472: #define RTX_COSTS(X,CODE,OUTER_CODE)                   \
        !          1473:   case MULT:                                           \
        !          1474:     return TARGET_V8 ? COSTS_N_INSNS (5) : COSTS_N_INSNS (25); \
        !          1475:   case DIV:                                            \
        !          1476:   case UDIV:                                           \
        !          1477:   case MOD:                                            \
        !          1478:   case UMOD:                                           \
        !          1479:     return COSTS_N_INSNS (25);                         \
        !          1480:   /* Make FLOAT and FIX more expensive than CONST_DOUBLE,\
        !          1481:      so that cse will favor the latter.  */            \
        !          1482:   case FLOAT:                                          \
        !          1483:   case FIX:                                            \
        !          1484:     return 19;
        !          1485: 
        !          1486: /* Conditional branches with empty delay slots have a length of two.  */
        !          1487: #define ADJUST_INSN_LENGTH(INSN, LENGTH)       \
        !          1488:   if (GET_CODE (INSN) == CALL_INSN                                     \
        !          1489:       || (GET_CODE (INSN) == JUMP_INSN && ! simplejump_p (insn)))      \
        !          1490:     LENGTH += 1;
        !          1491: 
        !          1492: /* Control the assembler format that we output.  */
        !          1493: 
        !          1494: /* Output at beginning of assembler file.  */
        !          1495: 
        !          1496: #define ASM_FILE_START(file)
        !          1497: 
        !          1498: /* Output to assembler file text saying following lines
        !          1499:    may contain character constants, extra white space, comments, etc.  */
        !          1500: 
        !          1501: #define ASM_APP_ON ""
        !          1502: 
        !          1503: /* Output to assembler file text saying following lines
        !          1504:    no longer contain unusual constructs.  */
        !          1505: 
        !          1506: #define ASM_APP_OFF ""
        !          1507: 
        !          1508: #define ASM_LONG       ".word"
        !          1509: #define ASM_SHORT      ".half"
        !          1510: #define ASM_BYTE_OP    ".byte"
        !          1511: 
        !          1512: /* Output before read-only data.  */
        !          1513: 
        !          1514: #define TEXT_SECTION_ASM_OP ".text"
        !          1515: 
        !          1516: /* Output before writable data.  */
        !          1517: 
        !          1518: #define DATA_SECTION_ASM_OP ".data"
        !          1519: 
        !          1520: /* How to refer to registers in assembler output.
        !          1521:    This sequence is indexed by compiler's hard-register-number (see above).  */
        !          1522: 
        !          1523: #define REGISTER_NAMES \
        !          1524: {"%g0", "%g1", "%g2", "%g3", "%g4", "%g5", "%g6", "%g7",               \
        !          1525:  "%o0", "%o1", "%o2", "%o3", "%o4", "%o5", "%sp", "%o7",               \
        !          1526:  "%l0", "%l1", "%l2", "%l3", "%l4", "%l5", "%l6", "%l7",               \
        !          1527:  "%i0", "%i1", "%i2", "%i3", "%i4", "%i5", "%fp", "%i7",               \
        !          1528:  "%f0", "%f1", "%f2", "%f3", "%f4", "%f5", "%f6", "%f7",               \
        !          1529:  "%f8", "%f9", "%f10", "%f11", "%f12", "%f13", "%f14", "%f15",         \
        !          1530:  "%f16", "%f17", "%f18", "%f19", "%f20", "%f21", "%f22", "%f23",       \
        !          1531:  "%f24", "%f25", "%f26", "%f27", "%f28", "%f29", "%f30", "%f31"}
        !          1532: 
        !          1533: /* Define additional names for use in asm clobbers and asm declarations.
        !          1534: 
        !          1535:    We define the fake Condition Code register as an alias for reg 0 (which
        !          1536:    is our `condition code' register), so that condition codes can easily
        !          1537:    be clobbered by an asm.  No such register actually exists.  Condition
        !          1538:    codes are partly stored in the PSR and partly in the FSR.  */
        !          1539: 
        !          1540: #define ADDITIONAL_REGISTER_NAMES      {"ccr", 0, "cc", 0}
        !          1541: 
        !          1542: /* How to renumber registers for dbx and gdb.  */
        !          1543: 
        !          1544: #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
        !          1545: 
        !          1546: /* On Sun 4, this limit is 2048.  We use 1500 to be safe,
        !          1547:    since the length can run past this up to a continuation point.  */
        !          1548: #define DBX_CONTIN_LENGTH 1500
        !          1549: 
        !          1550: /* This is how to output a note to DBX telling it the line number
        !          1551:    to which the following sequence of instructions corresponds.
        !          1552: 
        !          1553:    This is needed for SunOS 4.0, and should not hurt for 3.2
        !          1554:    versions either.  */
        !          1555: #define ASM_OUTPUT_SOURCE_LINE(file, line)             \
        !          1556:   { static int sym_lineno = 1;                         \
        !          1557:     fprintf (file, ".stabn 68,0,%d,LM%d\nLM%d:\n",     \
        !          1558:             line, sym_lineno, sym_lineno);             \
        !          1559:     sym_lineno += 1; }
        !          1560: 
        !          1561: /* This is how to output the definition of a user-level label named NAME,
        !          1562:    such as the label on a static function or variable NAME.  */
        !          1563: 
        !          1564: #define ASM_OUTPUT_LABEL(FILE,NAME)    \
        !          1565:   do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
        !          1566: 
        !          1567: /* This is how to output a command to make the user-level label named NAME
        !          1568:    defined for reference from other files.  */
        !          1569: 
        !          1570: #define ASM_GLOBALIZE_LABEL(FILE,NAME) \
        !          1571:   do { fputs ("\t.global ", FILE); assemble_name (FILE, NAME); fputs ("\n", FILE);} while (0)
        !          1572: 
        !          1573: /* This is how to output a reference to a user-level label named NAME.
        !          1574:    `assemble_name' uses this.  */
        !          1575: 
        !          1576: #define ASM_OUTPUT_LABELREF(FILE,NAME) \
        !          1577:   fprintf (FILE, "_%s", NAME)
        !          1578: 
        !          1579: /* This is how to output a definition of an internal numbered label where
        !          1580:    PREFIX is the class of label and NUM is the number within the class.  */
        !          1581: 
        !          1582: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)     \
        !          1583:   fprintf (FILE, "%s%d:\n", PREFIX, NUM)
        !          1584: 
        !          1585: /* This is how to output a reference to an internal numbered label where
        !          1586:    PREFIX is the class of label and NUM is the number within the class.  */
        !          1587: /* FIXME:  This should be used throughout gcc, and documented in the texinfo
        !          1588:    files.  There is no reason you should have to allocate a buffer and
        !          1589:    `sprintf' to reference an internal label (as opposed to defining it).  */
        !          1590: 
        !          1591: #define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM)  \
        !          1592:   fprintf (FILE, "%s%d", PREFIX, NUM)
        !          1593: 
        !          1594: /* This is how to store into the string LABEL
        !          1595:    the symbol_ref name of an internal numbered label where
        !          1596:    PREFIX is the class of label and NUM is the number within the class.
        !          1597:    This is suitable for output with `assemble_name'.  */
        !          1598: 
        !          1599: #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)  \
        !          1600:   sprintf (LABEL, "*%s%d", PREFIX, NUM)
        !          1601: 
        !          1602: /* This is how to output an assembler line defining a `double' constant.  */
        !          1603: 
        !          1604: /* Assemblers (both gas 1.35 and as in 4.0.3)
        !          1605:    seem to treat -0.0 as if it were 0.0.
        !          1606:    They reject 99e9999, but accept inf.  */
        !          1607: #define ASM_OUTPUT_DOUBLE(FILE,VALUE)                                  \
        !          1608:   {                                                                    \
        !          1609:     if (REAL_VALUE_ISINF (VALUE)                                       \
        !          1610:         || REAL_VALUE_ISNAN (VALUE)                                    \
        !          1611:        || REAL_VALUE_MINUS_ZERO (VALUE))                               \
        !          1612:       {                                                                        \
        !          1613:        long t[2];                                                      \
        !          1614:        REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), t);                       \
        !          1615:        fprintf (FILE, "\t%s\t0x%lx\n\t%s\t0x%lx\n",                    \
        !          1616:                 ASM_LONG, t[0], ASM_LONG, t[1]);                       \
        !          1617:       }                                                                        \
        !          1618:     else                                                               \
        !          1619:       fprintf (FILE, "\t.double 0r%.17g\n", VALUE);                    \
        !          1620:   }
        !          1621: 
        !          1622: /* This is how to output an assembler line defining a `float' constant.  */
        !          1623: 
        !          1624: #define ASM_OUTPUT_FLOAT(FILE,VALUE)                                   \
        !          1625:   {                                                                    \
        !          1626:     if (REAL_VALUE_ISINF (VALUE)                                       \
        !          1627:         || REAL_VALUE_ISNAN (VALUE)                                    \
        !          1628:        || REAL_VALUE_MINUS_ZERO (VALUE))                               \
        !          1629:       {                                                                        \
        !          1630:        long t;                                                         \
        !          1631:        REAL_VALUE_TO_TARGET_SINGLE ((VALUE), t);                       \
        !          1632:        fprintf (FILE, "\t%s\t0x%lx\n", ASM_LONG, t);                   \
        !          1633:       }                                                                        \
        !          1634:     else                                                               \
        !          1635:       fprintf (FILE, "\t.single 0r%.9g\n", VALUE);                     \
        !          1636:   }
        !          1637: 
        !          1638: /* This is how to output an assembler line defining a `long double'
        !          1639:    constant.  */
        !          1640: 
        !          1641: #define ASM_OUTPUT_LONG_DOUBLE(FILE,VALUE)                             \
        !          1642:   {                                                                    \
        !          1643:     long t[4];                                                         \
        !          1644:     REAL_VALUE_TO_TARGET_LONG_DOUBLE ((VALUE), t);                     \
        !          1645:     fprintf (FILE, "\t%s\t0x%lx\n\t%s\t0x%lx\n\t%s\t0x%lx\n\t%s\t0x%lx\n", \
        !          1646:       ASM_LONG, t[0], ASM_LONG, t[1], ASM_LONG, t[2], ASM_LONG, t[3]); \
        !          1647:   }
        !          1648: 
        !          1649: /* This is how to output an assembler line defining an `int' constant.  */
        !          1650: 
        !          1651: #define ASM_OUTPUT_INT(FILE,VALUE)  \
        !          1652: ( fprintf (FILE, "\t%s\t", ASM_LONG),          \
        !          1653:   output_addr_const (FILE, (VALUE)),           \
        !          1654:   fprintf (FILE, "\n"))
        !          1655: 
        !          1656: /* This is how to output an assembler line defining a DImode constant.  */
        !          1657: #define ASM_OUTPUT_DOUBLE_INT(FILE,VALUE)  \
        !          1658:   output_double_int (FILE, VALUE)
        !          1659: 
        !          1660: /* Likewise for `char' and `short' constants.  */
        !          1661: 
        !          1662: #define ASM_OUTPUT_SHORT(FILE,VALUE)  \
        !          1663: ( fprintf (FILE, "\t%s\t", ASM_SHORT),         \
        !          1664:   output_addr_const (FILE, (VALUE)),           \
        !          1665:   fprintf (FILE, "\n"))
        !          1666: 
        !          1667: #define ASM_OUTPUT_CHAR(FILE,VALUE)  \
        !          1668: ( fprintf (FILE, "\t%s\t", ASM_BYTE_OP),       \
        !          1669:   output_addr_const (FILE, (VALUE)),           \
        !          1670:   fprintf (FILE, "\n"))
        !          1671: 
        !          1672: /* This is how to output an assembler line for a numeric constant byte.  */
        !          1673: 
        !          1674: #define ASM_OUTPUT_BYTE(FILE,VALUE)  \
        !          1675:   fprintf (FILE, "\t%s\t0x%x\n", ASM_BYTE_OP, (VALUE))
        !          1676: 
        !          1677: /* This is how to output an element of a case-vector that is absolute.  */
        !          1678: 
        !          1679: #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
        !          1680: do {                                                                   \
        !          1681:   char label[30];                                                      \
        !          1682:   ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE);                     \
        !          1683:   fprintf (FILE, "\t.word\t");                                         \
        !          1684:   assemble_name (FILE, label);                                         \
        !          1685:   fprintf (FILE, "\n");                                                        \
        !          1686: } while (0)
        !          1687: 
        !          1688: /* This is how to output an element of a case-vector that is relative.
        !          1689:    (SPARC uses such vectors only when generating PIC.)  */
        !          1690: 
        !          1691: #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL)                     \
        !          1692: do {                                                                   \
        !          1693:   char label[30];                                                      \
        !          1694:   ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE);                     \
        !          1695:   fprintf (FILE, "\t.word\t");                                         \
        !          1696:   assemble_name (FILE, label);                                         \
        !          1697:   fprintf (FILE, "-1b\n");                                             \
        !          1698: } while (0)
        !          1699: 
        !          1700: /* This is how to output an assembler line
        !          1701:    that says to advance the location counter
        !          1702:    to a multiple of 2**LOG bytes.  */
        !          1703: 
        !          1704: #define ASM_OUTPUT_ALIGN(FILE,LOG)     \
        !          1705:   if ((LOG) != 0)                      \
        !          1706:     fprintf (FILE, "\t.align %d\n", (1<<(LOG)))
        !          1707: 
        !          1708: #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
        !          1709:   fprintf (FILE, "\t.skip %u\n", (SIZE))
        !          1710: 
        !          1711: /* This says how to output an assembler line
        !          1712:    to define a global common symbol.  */
        !          1713: 
        !          1714: #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
        !          1715: ( fputs ("\t.global ", (FILE)),                        \
        !          1716:   assemble_name ((FILE), (NAME)),              \
        !          1717:   fputs ("\n\t.common ", (FILE)),              \
        !          1718:   assemble_name ((FILE), (NAME)),              \
        !          1719:   fprintf ((FILE), ",%u,\"bss\"\n", (ROUNDED)))
        !          1720: 
        !          1721: /* This says how to output an assembler line
        !          1722:    to define a local common symbol.  */
        !          1723: 
        !          1724: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
        !          1725: ( fputs ("\n\t.reserve ", (FILE)),             \
        !          1726:   assemble_name ((FILE), (NAME)),              \
        !          1727:   fprintf ((FILE), ",%u,\"bss\"\n", (ROUNDED)))
        !          1728: 
        !          1729: /* Store in OUTPUT a string (made with alloca) containing
        !          1730:    an assembler-name for a local static variable named NAME.
        !          1731:    LABELNO is an integer which is different for each call.  */
        !          1732: 
        !          1733: #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
        !          1734: ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10),   \
        !          1735:   sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
        !          1736: 
        !          1737: #define IDENT_ASM_OP ".ident"
        !          1738: 
        !          1739: /* Output #ident as a .ident.  */
        !          1740: 
        !          1741: #define ASM_OUTPUT_IDENT(FILE, NAME) \
        !          1742:   fprintf (FILE, "\t%s\t\"%s\"\n", IDENT_ASM_OP, NAME);
        !          1743: 
        !          1744: /* Define the parentheses used to group arithmetic operations
        !          1745:    in assembler code.  */
        !          1746: 
        !          1747: #define ASM_OPEN_PAREN "("
        !          1748: #define ASM_CLOSE_PAREN ")"
        !          1749: 
        !          1750: /* Define results of standard character escape sequences.  */
        !          1751: #define TARGET_BELL 007
        !          1752: #define TARGET_BS 010
        !          1753: #define TARGET_TAB 011
        !          1754: #define TARGET_NEWLINE 012
        !          1755: #define TARGET_VT 013
        !          1756: #define TARGET_FF 014
        !          1757: #define TARGET_CR 015
        !          1758: 
        !          1759: #define PRINT_OPERAND_PUNCT_VALID_P(CHAR) \
        !          1760:   ((CHAR) == '#' || (CHAR) == '*' || (CHAR) == '^' || (CHAR) == '(')
        !          1761: 
        !          1762: /* Print operand X (an rtx) in assembler syntax to file FILE.
        !          1763:    CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
        !          1764:    For `%' followed by punctuation, CODE is the punctuation and X is null.  */
        !          1765: 
        !          1766: #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE)
        !          1767: 
        !          1768: /* Print a memory address as an operand to reference that memory location.  */
        !          1769: 
        !          1770: #define PRINT_OPERAND_ADDRESS(FILE, ADDR)  \
        !          1771: { register rtx base, index = 0;                                        \
        !          1772:   int offset = 0;                                              \
        !          1773:   register rtx addr = ADDR;                                    \
        !          1774:   if (GET_CODE (addr) == REG)                                  \
        !          1775:     fputs (reg_names[REGNO (addr)], FILE);                     \
        !          1776:   else if (GET_CODE (addr) == PLUS)                            \
        !          1777:     {                                                          \
        !          1778:       if (GET_CODE (XEXP (addr, 0)) == CONST_INT)              \
        !          1779:        offset = INTVAL (XEXP (addr, 0)), base = XEXP (addr, 1);\
        !          1780:       else if (GET_CODE (XEXP (addr, 1)) == CONST_INT)         \
        !          1781:        offset = INTVAL (XEXP (addr, 1)), base = XEXP (addr, 0);\
        !          1782:       else                                                     \
        !          1783:        base = XEXP (addr, 0), index = XEXP (addr, 1);          \
        !          1784:       fputs (reg_names[REGNO (base)], FILE);                   \
        !          1785:       if (index == 0)                                          \
        !          1786:        fprintf (FILE, "%+d", offset);                          \
        !          1787:       else if (GET_CODE (index) == REG)                                \
        !          1788:        fprintf (FILE, "+%s", reg_names[REGNO (index)]);        \
        !          1789:       else if (GET_CODE (index) == SYMBOL_REF)                 \
        !          1790:        fputc ('+', FILE), output_addr_const (FILE, index);     \
        !          1791:       else abort ();                                           \
        !          1792:     }                                                          \
        !          1793:   else if (GET_CODE (addr) == MINUS                            \
        !          1794:           && GET_CODE (XEXP (addr, 1)) == LABEL_REF)           \
        !          1795:     {                                                          \
        !          1796:       output_addr_const (FILE, XEXP (addr, 0));                        \
        !          1797:       fputs ("-(", FILE);                                      \
        !          1798:       output_addr_const (FILE, XEXP (addr, 1));                        \
        !          1799:       fputs ("-.)", FILE);                                     \
        !          1800:     }                                                          \
        !          1801:   else if (GET_CODE (addr) == LO_SUM)                          \
        !          1802:     {                                                          \
        !          1803:       output_operand (XEXP (addr, 0), 0);                      \
        !          1804:       fputs ("+%lo(", FILE);                                   \
        !          1805:       output_address (XEXP (addr, 1));                         \
        !          1806:       fputc (')', FILE);                                       \
        !          1807:     }                                                          \
        !          1808:   else if (flag_pic && GET_CODE (addr) == CONST                        \
        !          1809:           && GET_CODE (XEXP (addr, 0)) == MINUS                \
        !          1810:           && GET_CODE (XEXP (XEXP (addr, 0), 1)) == CONST      \
        !          1811:           && GET_CODE (XEXP (XEXP (XEXP (addr, 0), 1), 0)) == MINUS    \
        !          1812:           && XEXP (XEXP (XEXP (XEXP (addr, 0), 1), 0), 1) == pc_rtx)   \
        !          1813:     {                                                          \
        !          1814:       addr = XEXP (addr, 0);                                   \
        !          1815:       output_addr_const (FILE, XEXP (addr, 0));                        \
        !          1816:       /* Group the args of the second CONST in parenthesis.  */        \
        !          1817:       fputs ("-(", FILE);                                      \
        !          1818:       /* Skip past the second CONST--it does nothing for us.  */\
        !          1819:       output_addr_const (FILE, XEXP (XEXP (addr, 1), 0));      \
        !          1820:       /* Close the parenthesis.  */                            \
        !          1821:       fputc (')', FILE);                                       \
        !          1822:     }                                                          \
        !          1823:   else                                                         \
        !          1824:     {                                                          \
        !          1825:       output_addr_const (FILE, addr);                          \
        !          1826:     }                                                          \
        !          1827: }
        !          1828: 
        !          1829: /* Declare functions defined in sparc.c and used in templates.  */
        !          1830: 
        !          1831: extern char *singlemove_string ();
        !          1832: extern char *output_move_double ();
        !          1833: extern char *output_move_quad ();
        !          1834: extern char *output_fp_move_double ();
        !          1835: extern char *output_fp_move_quad ();
        !          1836: extern char *output_block_move ();
        !          1837: extern char *output_scc_insn ();
        !          1838: extern char *output_cbranch ();
        !          1839: extern char *output_return ();
        !          1840: 
        !          1841: /* Defined in flags.h, but insn-emit.c does not include flags.h.  */
        !          1842: 
        !          1843: extern int flag_pic;

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