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

1.1     ! root        1: /* Definitions of target machine for GNU compiler, for the HP Spectrum.
        !             2:    Copyright (C) 1992 Free Software Foundation, Inc.
        !             3:    Contributed by Michael Tiemann ([email protected])
        !             4:    and Tim Moore ([email protected]) of the Center for
        !             5:    Software Science at the University of Utah.
        !             6: 
        !             7: This file is part of GNU CC.
        !             8: 
        !             9: GNU CC is free software; you can redistribute it and/or modify
        !            10: it under the terms of the GNU General Public License as published by
        !            11: the Free Software Foundation; either version 1, or (at your option)
        !            12: any later version.
        !            13: 
        !            14: GNU CC is distributed in the hope that it will be useful,
        !            15: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            16: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            17: GNU General Public License for more details.
        !            18: 
        !            19: You should have received a copy of the GNU General Public License
        !            20: along with GNU CC; see the file COPYING.  If not, write to
        !            21: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            22: 
        !            23: enum cmp_type                          /* comparison type */
        !            24: {
        !            25:   CMP_SI,                              /* compare integers */
        !            26:   CMP_SF,                              /* compare single precision floats */
        !            27:   CMP_DF,                              /* compare double precision floats */
        !            28:   CMP_MAX                              /* max comparison type */
        !            29: };
        !            30: 
        !            31: #define DBX_DEBUGGING_INFO
        !            32: #define DEFAULT_GDB_EXTENSIONS 0
        !            33: 
        !            34: #if (TARGET_DEFAULT & 1) == 0
        !            35: #define CPP_SPEC "%{msnake:-D__hp9000s700 -D_PA_RISC1_1}"
        !            36: #else
        !            37: #define CPP_SPEC "-D__hp9000s700 -D_PA_RISC1_1"
        !            38: #endif
        !            39: 
        !            40: /* Defines for a K&R CC */
        !            41: 
        !            42: #ifdef OLD_CC
        !            43: #define CPP_SPEC "%{!gnu:-nostdinc %{!nostinc:-I/usr/include}} \
        !            44:   %{gnu:%{nostdinc}} %{!gnu:-traditional} -Dvolatile=__volatile"
        !            45: #define CC1_SPEC "%{!gnu:-traditional -fwritable-strings -fno-defer-pop} \
        !            46:   %{pg:} %{p:}"
        !            47: #else
        !            48: #define CC1_SPEC "%{pg:} %{p:}"
        !            49: #endif
        !            50:   
        !            51: /* Brain-dead loader */
        !            52: #ifdef hpux8
        !            53: #define LINK_SPEC "-u main -a archive"
        !            54: #else
        !            55: #define LINK_SPEC "-u main"
        !            56: #endif
        !            57: 
        !            58: /* Omit frame pointer at high optimization levels.  */
        !            59:   
        !            60: #define OPTIMIZATION_OPTIONS(OPTIMIZE) \
        !            61: {                                                              \
        !            62:   if (OPTIMIZE >= 2)                                           \
        !            63:     flag_omit_frame_pointer = 1;                               \
        !            64: }
        !            65: 
        !            66: /* These compiler options take an argument.  We ignore -target for now.  */
        !            67: 
        !            68: #define WORD_SWITCH_TAKES_ARG(STR)                     \
        !            69:  (!strcmp (STR, "Tdata") || !strcmp (STR, "include")   \
        !            70:   || !strcmp (STR, "imacros") || !strcmp (STR, "target")\
        !            71:   || !strcmp (STR, "aux-info"))
        !            72: 
        !            73: /* Names to predefine in the preprocessor for this target machine.  */
        !            74: 
        !            75: #define CPP_PREDEFINES "-Dhppa -Dhp9000s800 -D__hp9000s800 -Dhp9k8 -Dunix -D_HPUX_SOURCE -Dhp9000 -Dhp800 -Dspectrum -DREVARGV"
        !            76: 
        !            77: /* Print subsidiary information on the compiler version in use.  */
        !            78: 
        !            79: #define TARGET_VERSION fprintf (stderr, " (hp9000s800)");
        !            80: 
        !            81: /* Run-time compilation parameters selecting different hardware subsets.
        !            82: 
        !            83:    On the the hp9k800, we don't yet need any. But ... */
        !            84: 
        !            85: extern int target_flags;
        !            86: 
        !            87: /* compile code for PA-RISC 1.1 ("Snake") */
        !            88: 
        !            89: #define TARGET_SNAKE (target_flags & 1)
        !            90: 
        !            91: /* Macro to define tables used to set the flags.
        !            92:    This is a list in braces of pairs in braces,
        !            93:    each pair being { "NAME", VALUE }
        !            94:    where VALUE is the bits to set or minus the bits to clear.
        !            95:    An empty string NAME is used to identify the default VALUE.  */
        !            96: 
        !            97: #define TARGET_SWITCHES \
        !            98:   {{"snake", 1},       \
        !            99:    { "", TARGET_DEFAULT}}
        !           100: 
        !           101: #define TARGET_DEFAULT 0
        !           102: 
        !           103: /* target machine storage layout */
        !           104: 
        !           105: /* Define this if most significant bit is lowest numbered
        !           106:    in instructions that operate on numbered bit-fields.  */
        !           107: #define BITS_BIG_ENDIAN 1
        !           108: 
        !           109: /* Define this if most significant byte of a word is the lowest numbered.  */
        !           110: /* That is true on the hp9k8.  */
        !           111: #define BYTES_BIG_ENDIAN 1
        !           112: 
        !           113: /* Define this if most significant word of a multiword number is lowest
        !           114:    numbered.  */
        !           115: /* For the hp9k800 we can decide arbitrarily
        !           116:    since there are no machine instructions for them.  */
        !           117: #define WORDS_BIG_ENDIAN 1
        !           118: 
        !           119: /* number of bits in an addressable storage unit */
        !           120: #define BITS_PER_UNIT 8
        !           121: 
        !           122: /* Width in bits of a "word", which is the contents of a machine register.
        !           123:    Note that this is not necessarily the width of data type `int';
        !           124:    if using 16-bit ints on a 68000, this would still be 32.
        !           125:    But on a machine with 16-bit registers, this would be 16.  */
        !           126: #define BITS_PER_WORD 32
        !           127: 
        !           128: /* Width of a word, in units (bytes).  */
        !           129: #define UNITS_PER_WORD 4
        !           130: 
        !           131: /* Width in bits of a pointer.
        !           132:    See also the macro `Pmode' defined below.  */
        !           133: #define POINTER_SIZE 32
        !           134: 
        !           135: /* Allocation boundary (in *bits*) for storing arguments in argument list.  */
        !           136: #define PARM_BOUNDARY 32
        !           137: 
        !           138: /* Largest alignment required for any stack parameter, in bits.
        !           139:    Don't define this if it is equal to PARM_BOUNDARY */
        !           140: #define MAX_PARM_BOUNDARY 64
        !           141: 
        !           142: /* Boundary (in *bits*) on which stack pointer should be aligned.  */
        !           143: #define STACK_BOUNDARY (TARGET_SNAKE ? 512 : 64)
        !           144: 
        !           145: /* Allocation boundary (in *bits*) for the code of a function.  */
        !           146: #define FUNCTION_BOUNDARY 32
        !           147: 
        !           148: /* Alignment of field after `int : 0' in a structure.  */
        !           149: #define EMPTY_FIELD_BOUNDARY 32
        !           150: 
        !           151: /* Every structure's size must be a multiple of this.  */
        !           152: #define STRUCTURE_SIZE_BOUNDARY 8
        !           153: 
        !           154: /* A bitfield declared as `int' forces `int' alignment for the struct.  */
        !           155: #define PCC_BITFIELD_TYPE_MATTERS 1
        !           156: 
        !           157: /* No data type wants to be aligned rounder than this.  */
        !           158: #define BIGGEST_ALIGNMENT 64
        !           159: 
        !           160: /* Get around hp-ux assembler bug, and make strcpy of constants fast. */
        !           161: #define CONSTANT_ALIGNMENT(CODE, TYPEALIGN) \
        !           162:   ((TYPEALIGN) < 32 ? 32 : (TYPEALIGN))
        !           163: 
        !           164: /* Make arrays of chars word-aligned for the same reasons.  */
        !           165: #define DATA_ALIGNMENT(TYPE, ALIGN)            \
        !           166:   (TREE_CODE (TYPE) == ARRAY_TYPE              \
        !           167:    && TYPE_MODE (TREE_TYPE (TYPE)) == QImode   \
        !           168:    && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
        !           169: 
        !           170: 
        !           171: /* Set this nonzero if move instructions will actually fail to work
        !           172:    when given unaligned data.  */
        !           173: #define STRICT_ALIGNMENT 1
        !           174: 
        !           175: /* Generate calls to memcpy, memcmp and memset.  */
        !           176: #define TARGET_MEM_FUNCTIONS
        !           177: 
        !           178: /* Standard register usage.  */
        !           179: 
        !           180: /* Number of actual hardware registers.
        !           181:    The hardware registers are assigned numbers for the compiler
        !           182:    from 0 to just below FIRST_PSEUDO_REGISTER.
        !           183:    All registers that the compiler knows about must be given numbers,
        !           184:    even those that are not normally considered general registers.
        !           185: 
        !           186:    The hp9k800 has 32 fullword registers and 16 floating point
        !           187:    registers. The floating point registers hold either word or double
        !           188:    word values.
        !           189:    
        !           190:    16 additional registers are reserved.
        !           191:    
        !           192:    PA-RISC 1.1 has 32 fullword registers and 32 floating point
        !           193:    registers. However, the floating point registers behave
        !           194:    differently: the left and right halves of registers are addressable
        !           195:    as 32 bit registers. So, we will set things up like the 68k which
        !           196:    has different fp units: define separate register sets for the 1.0
        !           197:    and 1.1 fp units. */
        !           198: 
        !           199: #define FIRST_PSEUDO_REGISTER 113  /* 32 + 16 1.0 regs + 64 1.1 regs + */
        !           200:                                   /* 1 shift reg */
        !           201: 
        !           202: /* 1 for registers that have pervasive standard uses
        !           203:    and are not available for the register allocator.
        !           204: 
        !           205:    On the hp9k800, these are:
        !           206:    Reg 0       = 0 (hardware). However, 0 is used for condition code,
        !           207:                   so is not fixed.
        !           208:    Reg 1       = ADDIL target/Temporary (hardware).
        !           209:    Reg 2       = Return Pointer
        !           210:    Reg 3       = Unused
        !           211:    Reg 4       = Frame Pointer (Gnu)
        !           212:    Reg 5-18    = Preserved Registers
        !           213:    Reg 19-22   = Temporary Registers
        !           214:    Reg 23-26   = Temporary/Parameter Registers
        !           215:    Reg 27      = Global Data Pointer (hp)
        !           216:    Reg 28      = Temporary/???/Return Value register
        !           217:    Reg 29      = Temporary/Static Chain/Return Value register
        !           218:    Reg 30      = stack pointer
        !           219:    Reg 31      = Temporary/Millicode Return Pointer (hp)
        !           220: 
        !           221:    Freg 0-3    = Status Registers
        !           222:    Freg 4-7    = Arguments/Return Value
        !           223:    Freg 8-11   = Temporary Registers
        !           224:    Freg 12-15  = Preserved Registers
        !           225: 
        !           226:    Freg 16-31  = Reserved
        !           227: 
        !           228:    On the Snake, fp regs are
        !           229: 
        !           230:    Freg 0-3    = Status Registers
        !           231:    Freg 4L-7R  = Arguments/Return Value
        !           232:    Freg 8L-11R = Temporary Registers
        !           233:    Freg 12L-15R        = Preserved Registers
        !           234: 
        !           235:    Freg 16L-31R        = ?? Some partition of temporary and preserved; assume
        !           236:    preserved for now.
        !           237:    
        !           238: 
        !           239: */
        !           240: 
        !           241: #define FIXED_REGISTERS  \
        !           242:  {0, 0, 1, 1, 1, 0, 0, 0, \
        !           243:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           244:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           245:   0, 0, 0, 1, 0, 0, 1, 1, \
        !           246:   /* 1.0 fp registers */ \
        !           247:   1, 1, 1, 1, 0, 0, 0, 0, \
        !           248:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           249:   /* 1.1 fp registers */ \
        !           250:   1, 1, 1, 1, 1, 1, 1, 1, \
        !           251:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           252:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           253:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           254:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           255:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           256:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           257:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           258:   1}
        !           259: 
        !           260: /* 1 for registers not available across function calls.
        !           261:    These must include the FIXED_REGISTERS and also any
        !           262:    registers that can be used without being saved.
        !           263:    The latter must include the registers where values are returned
        !           264:    and the register where structure-value addresses are passed.
        !           265:    Aside from that, you can include as many other registers as you like.  */
        !           266: #define CALL_USED_REGISTERS  \
        !           267:  {1, 1, 1, 1, 1, 0, 0, 0, \
        !           268:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           269:   0, 0, 0, 1, 1, 1, 1, 1, \
        !           270:   1, 1, 1, 1, 1, 1, 1, 1, \
        !           271:   /* 1.0 fp registers */ \
        !           272:   1, 1, 1, 1, 1, 1, 1, 1, \
        !           273:   1, 1, 1, 1, 0, 0, 0, 0, \
        !           274:   /* 1.1 fp registers */ \
        !           275:   1, 1, 1, 1, 1, 1, 1, 1, \
        !           276:   1, 1, 1, 1, 1, 1, 1, 1, \
        !           277:   1, 1, 1, 1, 1, 1, 1, 1, \
        !           278:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           279:   0, 0, 0, 0, 0, 0, 0, 0, \
        !           280:   0, 0, 0, 0, 1, 1, 1, 1, \
        !           281:   1, 1, 1, 1, 1, 1, 1, 1, \
        !           282:   1, 1, 1, 1, 1, 1, 1, 1, \
        !           283:   1}    
        !           284: 
        !           285: /* Make sure everything's fine if we *don't* have a given processor.
        !           286:    This assumes that putting a register in fixed_regs will keep the
        !           287:    compiler's mitts completely off it.  We don't bother to zero it out
        !           288:    of register classes. 
        !           289: 
        !           290:    Make register 27 global for now.  We'll undo this kludge after 2.1.  */
        !           291: 
        !           292: #define CONDITIONAL_REGISTER_USAGE \
        !           293: {                                              \
        !           294:   int i;                                       \
        !           295:   HARD_REG_SET x;                              \
        !           296:   global_regs[27] = 1;                         \
        !           297:   if (!TARGET_SNAKE)                           \
        !           298:     {                                          \
        !           299:       COPY_HARD_REG_SET (x, reg_class_contents[(int)SNAKE_FP_REGS]);\
        !           300:       for (i = 0; i < FIRST_PSEUDO_REGISTER; i++ ) \
        !           301:        if (TEST_HARD_REG_BIT (x, i))           \
        !           302:        fixed_regs[i] = call_used_regs[i] = 1;  \
        !           303:     }                                          \
        !           304:   else                                         \
        !           305:     {                                          \
        !           306:       COPY_HARD_REG_SET (x, reg_class_contents[(int)FP_REGS]); \
        !           307:       for (i = 0; i < FIRST_PSEUDO_REGISTER; i++ ) \
        !           308:        if (TEST_HARD_REG_BIT (x, i))           \
        !           309:        fixed_regs[i] = call_used_regs[i] = 1;  \
        !           310:     }                                          \
        !           311: }
        !           312: 
        !           313: /* Allocated the call used registers first.  This should minimize
        !           314:    the number of registers that need to be saved (as call used
        !           315:    registers will generally not be allocated across a call).
        !           316: 
        !           317:    It is possible that it would be wise to allocate the floating point
        !           318:    registers before the regular ones, but I doubt it matters.  Same
        !           319:    comment for parameters versus normal.  */
        !           320: 
        !           321: #define REG_ALLOC_ORDER \
        !           322:  {19, 20, 21, 22, 23, 24, 25, 26,      \
        !           323:   27, 28, 29, 30, 31, 40, 41, 42,      \
        !           324:   43, 36, 37, 38, 39,                  \
        !           325:   56, 57, 58, 59, 60, 61, 62, 63,      \
        !           326:   64, 65, 66, 67, 68, 69, 70, 71,      \
        !           327:   72, 73, 74, 75, 76, 77, 78, 79,      \
        !           328:   80, 81, 82, 83, 84, 85, 86, 87,      \
        !           329:   88, 89, 90, 91, 92, 93, 94, 95,      \
        !           330:   96, 97, 98, 99, 100, 101, 102, 103,  \
        !           331:   104, 105, 106, 107, 108, 109, 110, 111,\
        !           332:    5,  6,  7,                          \
        !           333:    8,  9, 10, 11, 12, 13, 14, 15,      \
        !           334:   16, 17, 18, 44, 45, 46, 47,          \
        !           335:   48, 49, 50, 51, 52, 53, 54, 55,      \
        !           336:      1,        \
        !           337:    2,  3,  4, 32, 33, 34, 35,  0,      \
        !           338:    112}
        !           339: 
        !           340: 
        !           341: /* Return number of consecutive hard regs needed starting at reg REGNO
        !           342:    to hold something of mode MODE.
        !           343:    This is ordinarily the length in words of a value of mode MODE
        !           344:    but can be less for certain modes in special long registers.
        !           345: 
        !           346:    On the hp9k800, ordinary registers hold 32 bits worth;
        !           347:    The floating point registers are 64 bits wide. Snake fp regs are 32
        !           348:    bits wide */
        !           349: #define HARD_REGNO_NREGS(REGNO, MODE)   \
        !           350:   (((REGNO) < 32 || (REGNO) >= 48)     \
        !           351:    ? ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) : 1)
        !           352: 
        !           353: /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
        !           354:    On the hp9k800, the cpu registers can hold any mode.  We
        !           355:    force this to be an even register is it cannot hold the full mode.  */
        !           356: #define HARD_REGNO_MODE_OK(REGNO, MODE) \
        !           357:   ((REGNO) == 0 ? (MODE) == CCmode || (MODE) == CCFPmode               \
        !           358:    : (REGNO) < 32 ? ((GET_MODE_SIZE (MODE) <= 4) ? 1 : ((REGNO) & 1) == 0)\
        !           359:    : (REGNO) < 48 ? (GET_MODE_SIZE (MODE) >= 4)                                \
        !           360:    : (GET_MODE_SIZE (MODE) > 4 ? ((REGNO) & 1) == 0                    \
        !           361:       : GET_MODE_SIZE (MODE) == 4))
        !           362: 
        !           363: /* Value is 1 if it is a good idea to tie two pseudo registers
        !           364:    when one has mode MODE1 and one has mode MODE2.
        !           365:    If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
        !           366:    for any hard reg, then this must be 0 for correct output.  */
        !           367: #define MODES_TIEABLE_P(MODE1, MODE2) \
        !           368:   ((MODE1) == (MODE2) || GET_MODE_CLASS (MODE1) == GET_MODE_CLASS (MODE2))
        !           369: 
        !           370: /* Specify the registers used for certain standard purposes.
        !           371:    The values of these macros are register numbers.  */
        !           372: 
        !           373: /* the hp9k800 pc isn't overloaded on a register that the compiler knows about.  */
        !           374: /* #define PC_REGNUM  */
        !           375: 
        !           376: /* Register to use for pushing function arguments.  */
        !           377: #define STACK_POINTER_REGNUM 30
        !           378: 
        !           379: /* Base register for access to local variables of the function.  */
        !           380: #define FRAME_POINTER_REGNUM 4
        !           381: 
        !           382: /* Value should be nonzero if functions must have frame pointers.
        !           383:    Zero means the frame pointer need not be set up (and parms
        !           384:    may be accessed via the stack pointer) in functions that seem suitable.
        !           385:    This is computed in `reload', in reload1.c.  */
        !           386: extern int leaf_function;
        !           387: 
        !           388: #define FRAME_POINTER_REQUIRED (current_function_calls_alloca)
        !           389:   
        !           390: 
        !           391: /* C statement to store the difference between the frame pointer
        !           392:    and the stack pointer values immediately after the function prologue.
        !           393: 
        !           394:    Note, we always pretend that this is a leaf function because if
        !           395:    it's not, there's no point in trying to eliminate the
        !           396:    frame pointer.  If it is a leaf function, we guessed right!  */
        !           397: #define INITIAL_FRAME_POINTER_OFFSET(VAR) \
        !           398:   do { int __fsize = compute_frame_size (get_frame_size (), 1) + 32;   \
        !           399:        (VAR) = -(TARGET_SNAKE ? (__fsize + 63) & ~63 : __fsize); } while (0)
        !           400: 
        !           401: /* Base register for access to arguments of the function.  */
        !           402: #define ARG_POINTER_REGNUM 4
        !           403: 
        !           404: /* Register in which static-chain is passed to a function.  */
        !           405: /* ??? */
        !           406: #define STATIC_CHAIN_REGNUM 29
        !           407: 
        !           408: /* Register which holds offset table for position-independent
        !           409:    data references.  */
        !           410: 
        !           411: #define PIC_OFFSET_TABLE_REGNUM 18
        !           412: 
        !           413: #define INITIALIZE_PIC initialize_pic ()
        !           414: #define FINALIZE_PIC finalize_pic ()
        !           415: 
        !           416: /* Register in which address to store a structure value
        !           417:    is passed to a function.  */
        !           418: #define STRUCT_VALUE_REGNUM 28
        !           419: 
        !           420: /* Define the classes of registers for register constraints in the
        !           421:    machine description.  Also define ranges of constants.
        !           422: 
        !           423:    One of the classes must always be named ALL_REGS and include all hard regs.
        !           424:    If there is more than one class, another class must be named NO_REGS
        !           425:    and contain no registers.
        !           426: 
        !           427:    The name GENERAL_REGS must be the name of a class (or an alias for
        !           428:    another name such as ALL_REGS).  This is the class of registers
        !           429:    that is allowed by "g" or "r" in a register constraint.
        !           430:    Also, registers outside this class are allocated only when
        !           431:    instructions express preferences for them.
        !           432: 
        !           433:    The classes must be numbered in nondecreasing order; that is,
        !           434:    a larger-numbered class must never be contained completely
        !           435:    in a smaller-numbered class.
        !           436: 
        !           437:    For any two classes, it is very desirable that there be another
        !           438:    class that represents their union.  */
        !           439: 
        !           440:   /* The hp9k800 has four kinds of registers: general regs, 1.0 fp regs,
        !           441:      1.1 fp regs, and the high 1.1 fp regs, to which the operands of
        !           442:      fmpyadd and fmpysub are restricted. */
        !           443: 
        !           444: enum reg_class { NO_REGS, R1_REGS, GENERAL_REGS, FP_REGS, GENERAL_OR_FP_REGS,
        !           445:   HI_SNAKE_FP_REGS, SNAKE_FP_REGS, GENERAL_OR_SNAKE_FP_REGS,
        !           446:   SHIFT_REGS, ALL_REGS, LIM_REG_CLASSES}; 
        !           447: 
        !           448: #define N_REG_CLASSES (int) LIM_REG_CLASSES
        !           449: 
        !           450: /* Give names of register classes as strings for dump file.   */
        !           451: 
        !           452: #define REG_CLASS_NAMES \
        !           453:   { "NO_REGS", "R1_REGS", "GENERAL_REGS", "FP_REGS", "GENERAL_OR_FP_REGS",\
        !           454:     "HI_SNAKE_FP_REGS", "SNAKE_FP_REGS", "GENERAL_OR_SNAKE_FP_REGS",\
        !           455:     "SHIFT_REGS", "ALL_REGS"}
        !           456: 
        !           457: /* Define which registers fit in which classes.
        !           458:    This is an initializer for a vector of HARD_REG_SET
        !           459:    of length N_REG_CLASSES. Register 0, the "condition code" register,
        !           460:    is in no class. */
        !           461: 
        !           462: #define REG_CLASS_CONTENTS     \
        !           463: { {0, 0, 0, 0},                        /* NO_REGS */           \
        !           464:   {0x2, 0, 0, 0},              /* R1_REGS */           \
        !           465:   {-2, 0, 0, 0},               /* GENERAL_REGS */      \
        !           466:   {0, 0xffff, 0, 0},           /* FP_REGS */           \
        !           467:   {-2, 0xffff, 0, 0},          /* GENERAL_OR_FP_REGS */\
        !           468:   {0, 0, 0xffff0000, 0xffff},  /* HI_SNAKE_FP_REGS */  \
        !           469:   {0, 0xffff0000, ~0, 0xffff}, /* SNAKE_FP_REGS */     \
        !           470:   {-2, 0xffff0000, ~0, 0xffff},        /* GENERAL_OR_SNAKE_FP_REGS */\
        !           471:   {0, 0, 0, 0x10000},          /* SHIFT_REGS */        \
        !           472:   {-2, ~0, ~0, 0x1ffff}}       /* ALL_REGS */
        !           473: 
        !           474: /* The same information, inverted:
        !           475:    Return the class number of the smallest class containing
        !           476:    reg number REGNO.  This could be a conditional expression
        !           477:    or could index an array.  */
        !           478: 
        !           479: #define REGNO_REG_CLASS(REGNO)         \
        !           480:   ((REGNO) == 0 ? NO_REGS              \
        !           481:    : (REGNO) == 1 ? R1_REGS            \
        !           482:    : (REGNO) < 32 ? GENERAL_REGS       \
        !           483:    : (REGNO) < 48 ? FP_REGS            \
        !           484:    : (REGNO) < 80 ? SNAKE_FP_REGS      \
        !           485:    : (REGNO) < 112 ? HI_SNAKE_FP_REGS  \
        !           486:    : SHIFT_REGS)
        !           487: 
        !           488: /* The class value for index registers, and the one for base regs.  */
        !           489: #define INDEX_REG_CLASS GENERAL_REGS
        !           490: #define BASE_REG_CLASS GENERAL_REGS
        !           491: 
        !           492: /* Get reg_class from a letter such as appears in the machine description.  */
        !           493: 
        !           494: #define REG_CLASS_FROM_LETTER(C) \
        !           495:   ((C) == 'r' ? GENERAL_REGS :                                 \
        !           496:    ((C) == 'f' ? (!TARGET_SNAKE ? FP_REGS : NO_REGS) :         \
        !           497:     ((C) == 'x' ? (TARGET_SNAKE ? SNAKE_FP_REGS : NO_REGS) :   \
        !           498:      ((C) == 'y' ? (TARGET_SNAKE ? HI_SNAKE_FP_REGS : NO_REGS) :\
        !           499:       ((C) == 'q' ? SHIFT_REGS :                               \
        !           500:        ((C) == 'a' ? R1_REGS : NO_REGS))))))
        !           501: 
        !           502: /* The letters I, J, K, L and M in a register constraint string
        !           503:    can be used to stand for particular ranges of immediate operands.
        !           504:    This macro defines what the ranges are.
        !           505:    C is the letter, and VALUE is a constant value.
        !           506:    Return 1 if VALUE is in the range specified by C.
        !           507: 
        !           508: HP9000/800 immediate field sizes:
        !           509:   5 bits: scalar/floating short loads + stores; deposit; conditional branch
        !           510:   11 bits: arithmetic immediate, compare immediate
        !           511:   14 bits: loads and stores; load offset
        !           512:   21 bits: load and add immediate long (but this isn't really used)
        !           513:   (there are also 13-bit and 26-bit immediates but only in system instructions)
        !           514: 
        !           515:    `I' is used for the 11 bit constants.
        !           516:    `J' is used for the 14 bit constants.
        !           517:    `K' is used for unsigned 5 bit constants (extract/deposit operands).
        !           518:    `L' is used for the 5 bit constants.
        !           519:    `M' is used for 0.  */
        !           520: 
        !           521: #define CONST_OK_FOR_LETTER_P(VALUE, C)  \
        !           522:   ((C) == 'I' ? (unsigned) ((VALUE) + 0x400) < 0x800           \
        !           523:    : (C) == 'J' ? (unsigned) ((VALUE) + 0x2000) < 0x4000       \
        !           524:    : (C) == 'K' ? (unsigned) (VALUE) < 0x20                    \
        !           525:    : (C) == 'L' ? (unsigned) ((VALUE) + 0x10) < 0x20           \
        !           526:    : (C) == 'M' ? (VALUE) == 0                                 \
        !           527:    : 0)
        !           528: 
        !           529: /* Similar, but for floating constants, and defining letters G and H.
        !           530:    Here VALUE is the CONST_DOUBLE rtx itself.  */
        !           531: 
        !           532: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)  \
        !           533:   ((C) == 'G' && XINT (VALUE, 0) == 0 && XINT (VALUE, 1) == 0)
        !           534: 
        !           535: /* Given an rtx X being reloaded into a reg required to be
        !           536:    in class CLASS, return the class of reg to actually use.
        !           537:    In general this is just CLASS; but on some machines
        !           538:    in some cases it is preferable to use a more restrictive class.  */
        !           539: #define PREFERRED_RELOAD_CLASS(X,CLASS) (CLASS)
        !           540: 
        !           541: /* Return the register class of a scratch register needed to copy IN into
        !           542:    or out of a register in CLASS in MODE.  If it can be done directly,
        !           543:    NO_REGS is returned.  */
        !           544: 
        !           545: #define SECONDARY_RELOAD_CLASS(CLASS,MODE,IN) \
        !           546:   secondary_reload_class (CLASS, MODE, IN)
        !           547: 
        !           548: /* Return the maximum number of consecutive registers
        !           549:    needed to represent mode MODE in a register of class CLASS.  */
        !           550: #define CLASS_MAX_NREGS(CLASS, MODE)   \
        !           551:   ((CLASS) == FP_REGS ? 1 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
        !           552: 
        !           553: /* Stack layout; function entry, exit and calling.  */
        !           554: 
        !           555: /* Define this if pushing a word on the stack
        !           556:    makes the stack pointer a smaller address.  */
        !           557: /* #define STACK_GROWS_DOWNWARD */
        !           558: 
        !           559: /* Believe it or not.  */
        !           560: #define ARGS_GROW_DOWNWARD
        !           561: 
        !           562: /* Define this if the nominal address of the stack frame
        !           563:    is at the high-address end of the local variables;
        !           564:    that is, each additional local variable allocated
        !           565:    goes at a more negative offset in the frame.  */
        !           566: /* #define FRAME_GROWS_DOWNWARD */
        !           567: 
        !           568: /* Offset within stack frame to start allocating local variables at.
        !           569:    If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
        !           570:    first local allocated.  Otherwise, it is the offset to the BEGINNING
        !           571:    of the first local allocated.  */
        !           572: #define STARTING_FRAME_OFFSET 8
        !           573: 
        !           574: /* If we generate an insn to push BYTES bytes,
        !           575:    this says how many the stack pointer really advances by.
        !           576:    On the hp9k800, don't define this because there are no push insns.  */
        !           577: /*  #define PUSH_ROUNDING(BYTES) */
        !           578: 
        !           579: /* Offset of first parameter from the argument pointer register value.
        !           580:    This value will be negated because the arguments grow down.
        !           581:    Also note that on STACK_GROWS_UPWARD machines (such as this one)
        !           582:    this is the distance from the frame pointer to the end of the first
        !           583:    argument, not it's beginning.  To get the real offset of the first
        !           584:    argument, the size of the argument must be added.
        !           585: 
        !           586:    ??? Have to check on this.*/
        !           587: 
        !           588: /* #define FIRST_PARM_OFFSET(FNDECL) 36  */
        !           589: #define FIRST_PARM_OFFSET(FNDECL) -32 
        !           590: 
        !           591: /* Absolute value of offset from top-of-stack address to location to store the
        !           592:    function parameter if it can't go in a register.
        !           593:    Addresses for following parameters are computed relative to this one.  */
        !           594: /* #define FIRST_PARM_CALLER_OFFSET(FNDECL) 36 */
        !           595: #define FIRST_PARM_CALLER_OFFSET(FNDECL) -32 
        !           596: 
        !           597: 
        !           598: /* When a parameter is passed in a register, stack space is still
        !           599:    allocated for it.  */
        !           600: #define REG_PARM_STACK_SPACE(DECL) 16
        !           601: 
        !           602: /* Define this if the above stack space is to be considered part of the
        !           603:    space allocated by the caller.  */
        !           604: #define OUTGOING_REG_PARM_STACK_SPACE
        !           605: 
        !           606: /* Keep the stack pointer constant throughout the function.
        !           607:    This is both an optimization and a necessity: longjmp
        !           608:    doesn't behave itself when the stack pointer moves within
        !           609:    the function!  */
        !           610: #define ACCUMULATE_OUTGOING_ARGS
        !           611:   
        !           612: /* The weird HPPA calling conventions require a minimum of 48 bytes on 
        !           613:    the stack: 16 bytes for register saves, and 32 bytes for magic.
        !           614:    This is the difference between the logical top of stack and the
        !           615:    actual sp. */ 
        !           616: #define STACK_POINTER_OFFSET -32
        !           617: 
        !           618: #define STACK_DYNAMIC_OFFSET(FNDECL)   \
        !           619:   ((STACK_POINTER_OFFSET) - current_function_outgoing_args_size)
        !           620: 
        !           621: /* Value is 1 if returning from a function call automatically
        !           622:    pops the arguments described by the number-of-args field in the call.
        !           623:    FUNTYPE is the data type of the function (as a tree),
        !           624:    or for a library call it is an identifier node for the subroutine name.  */
        !           625: 
        !           626: #define RETURN_POPS_ARGS(FUNTYPE,SIZE) 0
        !           627: 
        !           628: /* Define how to find the value returned by a function.
        !           629:    VALTYPE is the data type of the value (as a tree).
        !           630:    If the precise function being called is known, FUNC is its FUNCTION_DECL;
        !           631:    otherwise, FUNC is 0.  */
        !           632: 
        !           633: /* On the hp9k800 the value is found in register(s) 28(-29), unless
        !           634:    the mode is SF or DF. Then the value is returned in fr4 (36, ) */
        !           635: 
        !           636: 
        !           637: #define FUNCTION_VALUE(VALTYPE, FUNC)  \
        !           638:   gen_rtx (REG, TYPE_MODE (VALTYPE), ((TYPE_MODE (VALTYPE) == SFmode ||\
        !           639:                                       TYPE_MODE (VALTYPE) == DFmode) ? \
        !           640:                                      (TARGET_SNAKE ? 56 : 36) : 28))
        !           641: 
        !           642: #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC)  \
        !           643:   FUNCTION_VALUE(VALTYPE, FUNC)
        !           644: 
        !           645: /* Define how to find the value returned by a library function
        !           646:    assuming the value has mode MODE.  */
        !           647: 
        !           648: #define LIBCALL_VALUE(MODE) \
        !           649:   gen_rtx (REG, MODE, (MODE == SFmode || MODE == DFmode ?\
        !           650:                       (TARGET_SNAKE ? 56 : 36) : 28))
        !           651: 
        !           652: /* 1 if N is a possible register number for a function value
        !           653:    as seen by the caller.  */
        !           654: 
        !           655: #define FUNCTION_VALUE_REGNO_P(N) ((N) == 28 || (N) == 36 || (N) == 56)
        !           656: 
        !           657: /* 1 if N is a possible register number for function argument passing.  */
        !           658: 
        !           659: #define FUNCTION_ARG_REGNO_P(N) (((N) >= 23 && (N) <= 26) || \
        !           660:                                 ((N) >= 36 && (N) <= 39) || \
        !           661:                                 ((N) >= 56 && (N) <= 63))
        !           662: 
        !           663: /* Define a data type for recording info about an argument list
        !           664:    during the scan of that argument list.  This data type should
        !           665:    hold all necessary information about the function itself
        !           666:    and about the args processed so far, enough to enable macros
        !           667:    such as FUNCTION_ARG to determine where the next arg should go.
        !           668: 
        !           669:    On the hp9k800, this is a single integer, which is a number of words
        !           670:    of arguments scanned so far (including the invisible argument,
        !           671:    if any, which holds the structure-value-address).
        !           672:    Thus 4 or more means all following args should go on the stack.  */
        !           673: 
        !           674: #define CUMULATIVE_ARGS int
        !           675: 
        !           676: /* Initialize a variable CUM of type CUMULATIVE_ARGS
        !           677:    for a call to a function whose data type is FNTYPE.
        !           678:    For a library call, FNTYPE is 0.
        !           679: */
        !           680: 
        !           681: #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME) ((CUM) = 0)
        !           682: 
        !           683: /* Figure out the size in words of the function argument. */
        !           684: 
        !           685: #define FUNCTION_ARG_SIZE(MODE, TYPE)  \
        !           686:   ((((MODE) != BLKmode ? GET_MODE_SIZE (MODE) : int_size_in_bytes (TYPE))+3)/4)
        !           687: 
        !           688: /* Update the data in CUM to advance over an argument
        !           689:    of mode MODE and data type TYPE.
        !           690:    (TYPE is null for libcalls where that information may not be available.)  */
        !           691: 
        !           692: #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)                   \
        !           693:     (((((CUM) & 01) && (TYPE) != 0 && TYPE_ALIGN (TYPE) > BITS_PER_WORD)\
        !           694:       && (CUM)++), (CUM) += FUNCTION_ARG_SIZE(MODE, TYPE))
        !           695: 
        !           696: /* Determine where to put an argument to a function.
        !           697:    Value is zero to push the argument on the stack,
        !           698:    or a hard register in which to store the argument.
        !           699: 
        !           700:    MODE is the argument's machine mode.
        !           701:    TYPE is the data type of the argument (as a tree).
        !           702:     This is null for libcalls where that information may
        !           703:     not be available.
        !           704:    CUM is a variable of type CUMULATIVE_ARGS which gives info about
        !           705:     the preceding args and about the function being called.
        !           706:    NAMED is nonzero if this argument is a named parameter
        !           707:     (otherwise it is an extra parameter matching an ellipsis).  */
        !           708: 
        !           709: /* On the hp9k800 the first four words of args are normally in registers
        !           710:    and the rest are pushed.  But any arg that won't entirely fit in regs
        !           711:    is pushed.  */
        !           712: 
        !           713: #define FUNCTION_ARG_PADDING(MODE, TYPE) function_arg_padding ((MODE), (TYPE))
        !           714: 
        !           715: #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED)                           \
        !           716:   (4 >= ((CUM) + FUNCTION_ARG_SIZE ((MODE), (TYPE)))                   \
        !           717:    ? gen_rtx (REG,                                                     \
        !           718:              (MODE),                                                   \
        !           719:              ((MODE) == SFmode ?                                       \
        !           720:               (TARGET_SNAKE ? 56 + 2 * (CUM) : 36  + (CUM)) :          \
        !           721:               ((MODE) == DFmode ? ((CUM) ?                             \
        !           722:                                    (TARGET_SNAKE ? 62 : 39) :          \
        !           723:                                    (TARGET_SNAKE ? 58 : 37)) :         \
        !           724:                (27 - (CUM) - FUNCTION_ARG_SIZE ((MODE), (TYPE))))))    \
        !           725:    : 0)
        !           726: 
        !           727: /* Define where a function finds its arguments.
        !           728:    This would be different from FUNCTION_ARG if we had register windows.  */
        !           729: 
        !           730: #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED)  \
        !           731:   FUNCTION_ARG (CUM, MODE, TYPE, NAMED)
        !           732: 
        !           733: /* For an arg passed partly in registers and partly in memory,
        !           734:    this is the number of registers used.
        !           735:    For args passed entirely in registers or entirely in memory, zero.  */
        !           736: 
        !           737: #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) 0
        !           738: 
        !           739: /* If defined, a C expression that gives the alignment boundary, in
        !           740:    bits, of an argument with the specified mode and type.  If it is
        !           741:    not defined,  `PARM_BOUNDARY' is used for all arguments.  */
        !           742: 
        !           743: #define FUNCTION_ARG_BOUNDARY(MODE, TYPE)                              \
        !           744:   (((TYPE) != 0)                                                       \
        !           745:        ? ((TYPE_ALIGN(TYPE) <= PARM_BOUNDARY)                          \
        !           746:                ? PARM_BOUNDARY                                         \
        !           747:                : TYPE_ALIGN(TYPE))                                     \
        !           748:        : ((GET_MODE_ALIGNMENT(MODE) <= PARM_BOUNDARY)                  \
        !           749:                ? PARM_BOUNDARY                                         \
        !           750:                : GET_MODE_ALIGNMENT(MODE)))
        !           751: 
        !           752: /* Arguments larger than eight bytes are passed by invisible reference */
        !           753: 
        !           754: #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED)         \
        !           755:   ((TYPE) && int_size_in_bytes (TYPE) > 8)
        !           756: 
        !           757: extern struct rtx_def *hppa_compare_op0, *hppa_compare_op1;
        !           758: extern enum cmp_type hppa_branch_type;
        !           759: 
        !           760: /* Output the label for a function definition.  */
        !           761: #ifdef HP_FP_ARG_DESCRIPTOR_REVERSED
        !           762: #define ASM_DOUBLE_ARG_DESCRIPTORS(FILE, ARG0, ARG1)   \
        !           763:   do { fprintf (FILE, ",ARGW%d=FR", (ARG0));           \
        !           764:        fprintf (FILE, ",ARGW%d=FU", (ARG1));} while (0)
        !           765: #else
        !           766: #define ASM_DOUBLE_ARG_DESCRIPTORS(FILE, ARG0, ARG1)   \
        !           767:   do { fprintf (FILE, ",ARGW%d=FU", (ARG0));           \
        !           768:        fprintf (FILE, ",ARGW%d=FR", (ARG1));} while (0)
        !           769: #endif
        !           770: #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
        !           771:     do { tree fntype = DECL_RESULT (DECL);                             \
        !           772:         tree tree_type = TREE_TYPE (DECL);                             \
        !           773:         tree parm;                                                     \
        !           774:         int i;                                                         \
        !           775:         if (TREE_PUBLIC (DECL))                                        \
        !           776:           {                                                            \
        !           777:             fputs ("\t.EXPORT ", FILE); assemble_name (FILE, NAME);    \
        !           778:             fputs (",PRIV_LEV=3", FILE);                               \
        !           779:             for (parm = DECL_ARGUMENTS (DECL), i = 0; parm && i < 4;   \
        !           780:                  parm = TREE_CHAIN (parm))                             \
        !           781:               {                                                        \
        !           782:                 if (TYPE_MODE (DECL_ARG_TYPE (parm)) == SFmode)        \
        !           783:                   fprintf (FILE, ",ARGW%d=FR", i++);                   \
        !           784:                 else if (TYPE_MODE (DECL_ARG_TYPE (parm)) == DFmode)   \
        !           785:                   {                                                    \
        !           786:                      if (i == 1) i++;                                  \
        !           787:                      ASM_DOUBLE_ARG_DESCRIPTORS (FILE, i++, i++);      \
        !           788:                   }                                                    \
        !           789:                 else                                                   \
        !           790:                   {                                                    \
        !           791:                     int arg_size =                                     \
        !           792:                       FUNCTION_ARG_SIZE (TYPE_MODE (DECL_ARG_TYPE (parm)),\
        !           793:                                          DECL_ARG_TYPE (parm));        \
        !           794:                     if (arg_size == 2 && i <= 2)                       \
        !           795:                       {                                                \
        !           796:                         if (i == 1) i++;                               \
        !           797:                         fprintf (FILE, ",ARGW%d=GR", i++);             \
        !           798:                         fprintf (FILE, ",ARGW%d=GR", i++);             \
        !           799:                       }                                                \
        !           800:                     else if (arg_size == 1)                            \
        !           801:                       fprintf (FILE, ",ARGW%d=GR", i++);               \
        !           802:                     else                                               \
        !           803:                       i += arg_size;                                   \
        !           804:                   }                                                    \
        !           805:               }                                                        \
        !           806:             /* anonymous args */                                       \
        !           807:             if (TYPE_ARG_TYPES (tree_type) != 0                        \
        !           808:                 && (TREE_VALUE (tree_last (TYPE_ARG_TYPES (tree_type)))\
        !           809:                     != void_type_node))                                \
        !           810:               {                                                        \
        !           811:                 for (; i < 4; i++)                                     \
        !           812:                   fprintf (FILE, ",ARGW%d=GR", i);                     \
        !           813:               }                                                        \
        !           814:             if (TYPE_MODE (fntype) == DFmode)                          \
        !           815:               fprintf (FILE, ",RTNVAL=FR");                            \
        !           816:             else if (TYPE_MODE (fntype) == SFmode)                     \
        !           817:               fprintf (FILE, ",RTNVAL=FU");                            \
        !           818:             else if (fntype != void_type_node)                         \
        !           819:               fprintf (FILE, ",RTNVAL=GR");                            \
        !           820:             fputs ("\n", FILE);                                        \
        !           821:           }                                                            \
        !           822:         ASM_OUTPUT_LABEL (FILE, NAME);} while (0)
        !           823: 
        !           824: /* Two views of the size of the current frame.  */
        !           825: extern int actual_fsize;
        !           826: extern int apparent_fsize;
        !           827: 
        !           828: /* This macro generates the assembly code for function entry.
        !           829:    FILE is a stdio stream to output the code to.
        !           830:    SIZE is an int: how many units of temporary storage to allocate.
        !           831:    Refer to the array `regs_ever_live' to determine which registers
        !           832:    to save; `regs_ever_live[I]' is nonzero if register number I
        !           833:    is ever used in the function.  This macro is responsible for
        !           834:    knowing which registers should not be saved even if used.  */
        !           835: 
        !           836: /* On HP-PA, move-double insns between fpu and cpu need an 8-byte block
        !           837:    of memory.  If any fpu reg is used in the function, we allocate
        !           838:    such a block here, at the bottom of the frame, just in case it's needed.
        !           839: 
        !           840:    If this function is a leaf procedure, then we may choose not
        !           841:    to do a "save" insn.  The decision about whether or not
        !           842:    to do this is made in regclass.c.  */
        !           843: 
        !           844: #define FUNCTION_PROLOGUE(FILE, SIZE) \
        !           845:   output_function_prologue (FILE, SIZE, leaf_function)
        !           846: 
        !           847: /* Output assembler code to FILE to increment profiler label # LABELNO
        !           848:    for profiling a function entry.
        !           849: 
        !           850:    Because HPUX _mcount is so different, we actually emit the
        !           851:    profiling code in function_prologue. This just stores LABELNO for
        !           852:    that. */
        !           853: 
        !           854: #define PROFILE_BEFORE_PROLOGUE
        !           855: #define FUNCTION_PROFILER(FILE, LABELNO) \
        !           856: { extern int hp_profile_labelno; hp_profile_labelno = (LABELNO);}
        !           857: 
        !           858: /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
        !           859:    the stack pointer does not matter.  The value is tested only in
        !           860:    functions that have frame pointers.
        !           861:    No definition is equivalent to always zero.  */
        !           862: 
        !           863: extern int may_call_alloca;
        !           864: extern int current_function_pretend_args_size;
        !           865: 
        !           866: #define EXIT_IGNORE_STACK      \
        !           867:  (get_frame_size () != 0       \
        !           868:   || current_function_calls_alloca || current_function_outgoing_args_size)
        !           869: 
        !           870: 
        !           871: /* This macro generates the assembly code for function exit,
        !           872:    on machines that need it.  If FUNCTION_EPILOGUE is not defined
        !           873:    then individual return instructions are generated for each
        !           874:    return statement.  Args are same as for FUNCTION_PROLOGUE.
        !           875: 
        !           876:    The function epilogue should not depend on the current stack pointer!
        !           877:    It should use the frame pointer only.  This is mandatory because
        !           878:    of alloca; we also take advantage of it to omit stack adjustments
        !           879:    before returning.  */
        !           880: 
        !           881: /* This declaration is needed due to traditional/ANSI
        !           882:    incompatibilities which cannot be #ifdefed away
        !           883:    because they occur inside of macros.  Sigh.  */
        !           884: extern union tree_node *current_function_decl;
        !           885: 
        !           886: #define FUNCTION_EPILOGUE(FILE, SIZE)                  \
        !           887:   output_function_epilogue (FILE, SIZE, leaf_function)
        !           888: #define DELAY_SLOTS_FOR_EPILOGUE 1
        !           889: #define ELIGIBLE_FOR_EPILOGUE_DELAY(trial, slots_filled)       \
        !           890:   eligible_for_epilogue_delay (trial, slots_filled)
        !           891: 
        !           892: /* Output assembler code for a block containing the constant parts
        !           893:    of a trampoline, leaving space for the variable parts.  */
        !           894: 
        !           895: #define TRAMPOLINE_TEMPLATE(FILE) {}
        !           896: 
        !           897: /* Length in units of the trampoline for entering a nested function.  */
        !           898: 
        !           899: #define TRAMPOLINE_SIZE 0
        !           900: 
        !           901: /* Emit RTL insns to initialize the variable parts of a trampoline.
        !           902:    FNADDR is an RTX for the address of the function's pure code.
        !           903:    CXT is an RTX for the static chain value for the function.
        !           904: 
        !           905:    This takes 16 insns: 2 shifts & 2 ands (to split up addresses), 4 sethi
        !           906:    (to load in opcodes), 4 iors (to merge address and opcodes), and 4 writes
        !           907:    (to store insns).  This is a bit excessive.  Perhaps a different
        !           908:    mechanism would be better here.  */
        !           909: #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) {}
        !           910: 
        !           911: /* Emit code for a call to builtin_saveregs.  We must emit USE insns which
        !           912:    reference the 4 integer arg registers and 4 fp arg registers.
        !           913:    Ordinarily they are not call used registers, but they are for
        !           914:    _builtin_saveregs, so we must make this explicit.  */
        !           915: 
        !           916: 
        !           917: #if 0
        !           918: #define EXPAND_BUILTIN_SAVEREGS(ARGLIST)                               \
        !           919:   (emit_insn (gen_rtx (USE, VOIDmode, gen_rtx (REG, TImode, 23))),     \
        !           920:    (TARGET_SNAKE ?                                                     \
        !           921:     (emit_insn (gen_rtx (USE, VOIDmode, gen_rtx (REG, DFmode, 56))),   \
        !           922:      emit_insn (gen_rtx (USE, VOIDmode, gen_rtx (REG, DFmode, 58))),   \
        !           923:      emit_insn (gen_rtx (USE, VOIDmode, gen_rtx (REG, DFmode, 60))),   \
        !           924:      emit_insn (gen_rtx (USE, VOIDmode, gen_rtx (REG, DFmode, 62)))) : \
        !           925:     (emit_insn (gen_rtx (USE, VOIDmode, gen_rtx (REG, DFmode, 36))),   \
        !           926:      emit_insn (gen_rtx (USE, VOIDmode, gen_rtx (REG, DFmode, 37))),   \
        !           927:      emit_insn (gen_rtx (USE, VOIDmode, gen_rtx (REG, DFmode, 38))),   \
        !           928:      emit_insn (gen_rtx (USE, VOIDmode, gen_rtx (REG, DFmode, 39))))))
        !           929: #endif
        !           930: #define EXPAND_BUILTIN_SAVEREGS(ARGLIST) (rtx)hppa_builtin_saveregs (ARGLIST)
        !           931: 
        !           932: 
        !           933: /* Addressing modes, and classification of registers for them.  */
        !           934: 
        !           935: #define HAVE_POST_INCREMENT
        !           936: #define HAVE_POST_DECREMENT
        !           937: 
        !           938: #define HAVE_PRE_DECREMENT
        !           939: #define HAVE_PRE_INCREMENT
        !           940: 
        !           941: /* Macros to check register numbers against specific register classes.  */
        !           942: 
        !           943: /* These assume that REGNO is a hard or pseudo reg number.
        !           944:    They give nonzero only if REGNO is a hard reg of the suitable class
        !           945:    or a pseudo reg currently allocated to a suitable hard reg.
        !           946:    Since they use reg_renumber, they are safe only once reg_renumber
        !           947:    has been allocated, which happens in local-alloc.c.  */
        !           948: 
        !           949: #define REGNO_OK_FOR_INDEX_P(REGNO) \
        !           950:   ((REGNO) && ((REGNO) < 32 || (unsigned) reg_renumber[REGNO] < 32))
        !           951: #define REGNO_OK_FOR_BASE_P(REGNO)  \
        !           952:   ((REGNO) && ((REGNO) < 32 || (unsigned) reg_renumber[REGNO] < 32))
        !           953: #define REGNO_OK_FOR_FP_P(REGNO) \
        !           954:   (((REGNO) >= 32 || reg_renumber[REGNO] >= 32)\
        !           955:    && ((REGNO) <= 111 || reg_renumber[REGNO] <= 111))
        !           956: 
        !           957: /* Now macros that check whether X is a register and also,
        !           958:    strictly, whether it is in a specified class.
        !           959: 
        !           960:    These macros are specific to the the hp9k800, and may be used only
        !           961:    in code for printing assembler insns and in conditions for
        !           962:    define_optimization.  */
        !           963: 
        !           964: /* 1 if X is an fp register.  */
        !           965: 
        !           966: #define FP_REG_P(X) (REG_P (X) && REGNO_OK_FOR_FP_P (REGNO (X)))
        !           967: 
        !           968: /* Maximum number of registers that can appear in a valid memory address.  */
        !           969: 
        !           970: #define MAX_REGS_PER_ADDRESS 2
        !           971: 
        !           972: /* Recognize any constant value that is a valid address.  */
        !           973: 
        !           974: #define CONSTANT_ADDRESS_P(X)  CONSTANT_P (X)
        !           975: 
        !           976: /* Nonzero if the constant value X is a legitimate general operand.
        !           977:    It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.  */
        !           978: 
        !           979: /*#define LEGITIMATE_CONSTANT_P(X) (1)*/
        !           980: #define LEGITIMATE_CONSTANT_P(X)               \
        !           981:  (GET_CODE (X) != CONST_DOUBLE)
        !           982: 
        !           983: /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
        !           984:    and check its validity for a certain class.
        !           985:    We have two alternate definitions for each of them.
        !           986:    The usual definition accepts all pseudo regs; the other rejects
        !           987:    them unless they have been allocated suitable hard regs.
        !           988:    The symbol REG_OK_STRICT causes the latter definition to be used.
        !           989: 
        !           990:    Most source files want to accept pseudo regs in the hope that
        !           991:    they will get allocated to the class that the insn wants them to be in.
        !           992:    Source files for reload pass need to be strict.
        !           993:    After reload, it makes no difference, since pseudo regs have
        !           994:    been eliminated by then.  */
        !           995: 
        !           996: /* Optional extra constraints for this machine. Borrowed from sparc.h.
        !           997: 
        !           998:    For the HPPA, `Q' means that this is a memory operand but not a
        !           999:    symbolic memory operand.  Note that an unassigned pseudo register
        !          1000:    is such a memory operand.  Needed because reload will generate
        !          1001:    these things in insns and then not re-recognize the insns, causing
        !          1002:    constrain_operands to fail.
        !          1003: 
        !          1004:    `R' handles the LO_SUM which can be an address for `Q'.
        !          1005: 
        !          1006:    `S' handles constraints for calls.
        !          1007: 
        !          1008:    `T' is for fp load and store addresses.*/
        !          1009: 
        !          1010: #ifndef REG_OK_STRICT
        !          1011: 
        !          1012: /* Nonzero if X is a hard reg that can be used as an index
        !          1013:    or if it is a pseudo reg.  */
        !          1014: #define REG_OK_FOR_INDEX_P(X) \
        !          1015: (REGNO (X) && (REGNO (X) < 32 || REGNO (X) > FIRST_PSEUDO_REGISTER))
        !          1016: /* Nonzero if X is a hard reg that can be used as a base reg
        !          1017:    or if it is a pseudo reg.  */
        !          1018: #define REG_OK_FOR_BASE_P(X) \
        !          1019: (REGNO (X) && (REGNO (X) < 32 || REGNO (X) > FIRST_PSEUDO_REGISTER))
        !          1020: 
        !          1021: #define EXTRA_CONSTRAINT(OP, C)                                \
        !          1022:   ((C) == 'Q' ?                                                \
        !          1023:    ((GET_CODE (OP) == MEM                              \
        !          1024:      && memory_address_p (GET_MODE (OP), XEXP (OP, 0)) \
        !          1025:      && ! symbolic_memory_operand (OP, VOIDmode)))     \
        !          1026:    : ((C) == 'R' ?                                     \
        !          1027:       (GET_CODE (OP) == LO_SUM                         \
        !          1028:        && GET_CODE (XEXP (OP, 0)) == REG               \
        !          1029:        && REG_OK_FOR_BASE_P (XEXP (OP, 0)))            \
        !          1030:       : ((C) == 'S'                                    \
        !          1031:         ? CONSTANT_P (OP) || memory_address_p (Pmode, OP)\
        !          1032:         : ((C) == 'T' ? short_memory_operand (OP, VOIDmode) : 0))))\
        !          1033: 
        !          1034: 
        !          1035: #else
        !          1036: 
        !          1037: /* Nonzero if X is a hard reg that can be used as an index.  */
        !          1038: #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
        !          1039: /* Nonzero if X is a hard reg that can be used as a base reg.  */
        !          1040: #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
        !          1041: 
        !          1042: #define EXTRA_CONSTRAINT(OP, C)                                \
        !          1043:   (((C) == 'Q' || (C) == 'T') ?                                \
        !          1044:    (GET_CODE (OP) == REG ?                             \
        !          1045:     (REGNO (OP) >= FIRST_PSEUDO_REGISTER               \
        !          1046:      && reg_renumber[REGNO (OP)] < 0)                  \
        !          1047:     : GET_CODE (OP) == MEM)                            \
        !          1048:    : ((C) == 'R' ?                                     \
        !          1049:       (GET_CODE (OP) == LO_SUM                         \
        !          1050:        && GET_CODE (XEXP (OP, 0)) == REG               \
        !          1051:        && REG_OK_FOR_BASE_P (XEXP (OP, 0)))            \
        !          1052:       : (CONSTANT_P (OP)                               \
        !          1053:            || (GET_CODE (OP) == REG && reg_renumber[REGNO (OP)] > 0)\
        !          1054:            || strict_memory_address_p (Pmode, OP))))
        !          1055: 
        !          1056: #endif
        !          1057: 
        !          1058: /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
        !          1059:    that is a valid memory address for an instruction.
        !          1060:    The MODE argument is the machine mode for the MEM expression
        !          1061:    that wants to use this address.
        !          1062: 
        !          1063:    On the hp9k800, the actual legitimate addresses must be
        !          1064:    REG+REG, REG+(REG*SCALE) or REG+SMALLINT.
        !          1065:    But we can treat a SYMBOL_REF as legitimate if it is part of this
        !          1066:    function's constant-pool, because such addresses can actually
        !          1067:    be output as REG+SMALLINT.  */
        !          1068: 
        !          1069: #define VAL_5_BITS_P(X) ((unsigned)(X) + 0x10 < 0x20)
        !          1070: #define INT_5_BITS(X) VAL_5_BITS_P (INTVAL (X))
        !          1071: 
        !          1072: #define VAL_U5_BITS_P(X) ((unsigned)(X) < 0x20)
        !          1073: #define INT_U5_BITS(X) VAL_U5_BITS_P (INTVAL (X))
        !          1074: 
        !          1075: #define VAL_11_BITS_P(X) ((unsigned)(X) + 0x400 < 0x800)
        !          1076: #define INT_11_BITS(X) VAL_11_BITS_P (INTVAL (X))
        !          1077: 
        !          1078: #define VAL_14_BITS_P(X) ((unsigned)(X) + 0x2000 < 0x4000)
        !          1079: #define INT_14_BITS(X) VAL_14_BITS_P (INTVAL (X))
        !          1080: 
        !          1081: #define FITS_14_BITS(X)        \
        !          1082:    (GET_CODE (X) == CONST_INT && INT_14_BITS (X))
        !          1083: 
        !          1084: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR)  \
        !          1085: {                                                      \
        !          1086:   if ((REG_P (X) && REG_OK_FOR_BASE_P (X))             \
        !          1087:       || ((GET_CODE (X) == PRE_DEC || GET_CODE (X) == POST_DEC         \
        !          1088:           || GET_CODE (X) == PRE_INC || GET_CODE (X) == POST_INC)      \
        !          1089:          && REG_P (XEXP (X, 0))                        \
        !          1090:          && REG_OK_FOR_BASE_P (XEXP (X, 0))))          \
        !          1091:     goto ADDR;                                         \
        !          1092:   else if (GET_CODE (X) == PLUS)                       \
        !          1093:     {                                                  \
        !          1094:       rtx base = 0, index;                             \
        !          1095:       if (flag_pic && XEXP (X, 0) == pic_offset_table_rtx)\
        !          1096:        {                                               \
        !          1097:          if (GET_CODE (XEXP (X, 1)) == REG             \
        !          1098:              && REG_OK_FOR_BASE_P (XEXP (X, 1)))       \
        !          1099:            goto ADDR;                                  \
        !          1100:          else if (flag_pic == 1                        \
        !          1101:                   && GET_CODE (XEXP (X, 1)) != REG     \
        !          1102:                   && GET_CODE (XEXP (X, 1)) != LO_SUM  \
        !          1103:                   && GET_CODE (XEXP (X, 1)) != MEM)    \
        !          1104:            goto ADDR;                                  \
        !          1105:        }                                               \
        !          1106:       else if (REG_P (XEXP (X, 0))                     \
        !          1107:          && REG_OK_FOR_BASE_P (XEXP (X, 0)))           \
        !          1108:        base = XEXP (X, 0), index = XEXP (X, 1);        \
        !          1109:       else if (REG_P (XEXP (X, 1))                     \
        !          1110:               && REG_OK_FOR_BASE_P (XEXP (X, 1)))      \
        !          1111:        base = XEXP (X, 1), index = XEXP (X, 0);        \
        !          1112:       if (base != 0)                                   \
        !          1113:        if (GET_CODE (index) == CONST_INT               \
        !          1114:            && ((INT_14_BITS (index) && (MODE) != SFmode && (MODE) != DFmode) \
        !          1115:                || INT_5_BITS (index)))                 \
        !          1116:          goto ADDR;                                    \
        !          1117:     }                                                  \
        !          1118:   else if (GET_CODE (X) == LO_SUM                      \
        !          1119:           && GET_CODE (XEXP (X, 0)) == REG             \
        !          1120:           && REG_OK_FOR_BASE_P (XEXP (X, 0))           \
        !          1121:           && CONSTANT_P (XEXP (X, 1))                  \
        !          1122:           && (MODE) != SFmode                          \
        !          1123:           && (MODE) != DFmode)                         \
        !          1124:     goto ADDR;                                         \
        !          1125:   else if (GET_CODE (X) == LO_SUM                      \
        !          1126:           && GET_CODE (XEXP (X, 0)) == SUBREG          \
        !          1127:           && GET_CODE (SUBREG_REG (XEXP (X, 0))) == REG\
        !          1128:           && REG_OK_FOR_BASE_P (SUBREG_REG (XEXP (X, 0)))\
        !          1129:           && CONSTANT_P (XEXP (X, 1))                  \
        !          1130:           && (MODE) != SFmode                          \
        !          1131:           && (MODE) != DFmode)                         \
        !          1132:     goto ADDR;                                         \
        !          1133:   else if (GET_CODE (X) == LABEL_REF                   \
        !          1134:           || (GET_CODE (X) == CONST_INT                \
        !          1135:               && INT_14_BITS (X)))                     \
        !          1136:     goto ADDR;                                         \
        !          1137: }
        !          1138: 
        !          1139: /* Try machine-dependent ways of modifying an illegitimate address
        !          1140:    to be legitimate.  If we find one, return the new, valid address.
        !          1141:    This macro is used in only one place: `memory_address' in explow.c.
        !          1142: 
        !          1143:    OLDX is the address as it was before break_out_memory_refs was called.
        !          1144:    In some cases it is useful to look at this to decide what needs to be done.
        !          1145: 
        !          1146:    MODE and WIN are passed so that this macro can use
        !          1147:    GO_IF_LEGITIMATE_ADDRESS.
        !          1148: 
        !          1149:    It is always safe for this macro to do nothing.  It exists to recognize
        !          1150:    opportunities to optimize the output.  */
        !          1151: 
        !          1152: /* On the hp9k800, change REG+N into REG+REG, and REG+(X*Y) into REG+REG.  */
        !          1153: 
        !          1154: #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN)    \
        !          1155: { if (GET_CODE (X) == PLUS && CONSTANT_ADDRESS_P (XEXP (X, 1)))        \
        !          1156:     (X) = gen_rtx (PLUS, SImode, XEXP (X, 0),                  \
        !          1157:                   copy_to_mode_reg (SImode, XEXP (X, 1)));     \
        !          1158:   if (GET_CODE (X) == PLUS && CONSTANT_ADDRESS_P (XEXP (X, 0)))        \
        !          1159:     (X) = gen_rtx (PLUS, SImode, XEXP (X, 1),                  \
        !          1160:                   copy_to_mode_reg (SImode, XEXP (X, 0)));     \
        !          1161:   if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == MULT)  \
        !          1162:     (X) = gen_rtx (PLUS, SImode, XEXP (X, 1),                  \
        !          1163:                   force_operand (XEXP (X, 0), 0));             \
        !          1164:   if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 1)) == MULT)  \
        !          1165:     (X) = gen_rtx (PLUS, SImode, XEXP (X, 0),                  \
        !          1166:                   force_operand (XEXP (X, 1), 0));             \
        !          1167:   if (memory_address_p (MODE, X))                              \
        !          1168:     goto WIN;                                                  \
        !          1169:   if (flag_pic) (X) = legitimize_pic_address (X, MODE, gen_reg_rtx (Pmode));\
        !          1170:   else if ((GET_CODE (X) == SYMBOL_REF & read_only_operand (X))        \
        !          1171:            || GET_CODE (X) == LABEL_REF)                       \
        !          1172:     (X) = gen_rtx (LO_SUM, Pmode,                              \
        !          1173:                   copy_to_mode_reg (Pmode, gen_rtx (HIGH, Pmode, X)), X); \
        !          1174:   else if (GET_CODE (X) == SYMBOL_REF)                         \
        !          1175:     (X) = gen_rtx (LO_SUM, Pmode,                              \
        !          1176:                   copy_to_mode_reg (Pmode,                     \
        !          1177:                                     gen_rtx (PLUS, Pmode,      \
        !          1178:                                              copy_to_mode_reg (Pmode,\
        !          1179:                                                                gen_rtx (HIGH, Pmode, X)),\
        !          1180:                                              gen_rtx (REG, Pmode, 27))),\
        !          1181:                   X);                                          \
        !          1182:   if (memory_address_p (MODE, X))                              \
        !          1183:     goto WIN;}
        !          1184: 
        !          1185: /* Go to LABEL if ADDR (a legitimate address expression)
        !          1186:    has an effect that depends on the machine mode it is used for.  */
        !          1187: 
        !          1188: #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)       \
        !          1189:   if (GET_CODE (ADDR) == PRE_DEC       \
        !          1190:       || GET_CODE (ADDR) == POST_DEC   \
        !          1191:       || GET_CODE (ADDR) == PRE_INC    \
        !          1192:       || GET_CODE (ADDR) == POST_INC)  \
        !          1193:     goto LABEL
        !          1194: 
        !          1195: /* Define this macro if references to a symbol must be treated
        !          1196:    differently depending on something about the variable or
        !          1197:    function named by the symbol (such as what section it is in).
        !          1198: 
        !          1199:    The macro definition, if any, is executed immediately after the
        !          1200:    rtl for DECL or other node is created.
        !          1201:    The value of the rtl will be a `mem' whose address is a
        !          1202:    `symbol_ref'.
        !          1203: 
        !          1204:    The usual thing for this macro to do is to a flag in the
        !          1205:    `symbol_ref' (such as `SYMBOL_REF_FLAG') or to store a modified
        !          1206:    name string in the `symbol_ref' (if one bit is not enough
        !          1207:    information).
        !          1208: 
        !          1209:    On the PA-RISC we use this to indicate if a symbol is in text or
        !          1210:    data space.  */
        !          1211: 
        !          1212: #define ENCODE_SECTION_INFO(DECL)\
        !          1213: do                                                                     \
        !          1214:   {                                                                    \
        !          1215:     if (TREE_CODE (DECL) == FUNCTION_DECL)                             \
        !          1216:       SYMBOL_REF_FLAG (XEXP (DECL_RTL (DECL), 0)) = 1;                 \
        !          1217:     else                                                               \
        !          1218:       {                                                                        \
        !          1219:        rtx rtl = (TREE_CODE_CLASS (TREE_CODE (DECL)) != 'd'            \
        !          1220:                   ? TREE_CST_RTL (DECL) : DECL_RTL (DECL));            \
        !          1221:        if (RTX_UNCHANGING_P (rtl) && !MEM_VOLATILE_P (rtl)             \
        !          1222:            && !flag_pic)                                               \
        !          1223:          SYMBOL_REF_FLAG (XEXP (rtl, 0)) = 1;                          \
        !          1224:       }                                                                        \
        !          1225:   }                                                                    \
        !          1226: while (0)
        !          1227:   
        !          1228: 
        !          1229: /* Specify the machine mode that this machine uses
        !          1230:    for the index in the tablejump instruction.  */
        !          1231: #define CASE_VECTOR_MODE SImode
        !          1232: 
        !          1233: /* Define this if the tablejump instruction expects the table
        !          1234:    to contain offsets from the address of the table.
        !          1235:    Do not define this if the table should contain absolute addresses.  */
        !          1236: /* #define CASE_VECTOR_PC_RELATIVE */
        !          1237: 
        !          1238: /* Specify the tree operation to be used to convert reals to integers.  */
        !          1239: #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
        !          1240: 
        !          1241: /* This is the kind of divide that is easiest to do in the general case.  */
        !          1242: #define EASY_DIV_EXPR TRUNC_DIV_EXPR
        !          1243: 
        !          1244: /* Define this as 1 if `char' should by default be signed; else as 0.  */
        !          1245: #define DEFAULT_SIGNED_CHAR 1
        !          1246: 
        !          1247: /* Max number of bytes we can move from memory to memory
        !          1248:    in one reasonably fast instruction.  */
        !          1249: #define MOVE_MAX 8
        !          1250: 
        !          1251: /* Define if normal loads of shorter-than-word items from memory clears
        !          1252:    the rest of the bigs in the register.  */
        !          1253: #define BYTE_LOADS_ZERO_EXTEND
        !          1254: 
        !          1255: /* Nonzero if access to memory by bytes is slow and undesirable.  */
        !          1256: #define SLOW_BYTE_ACCESS 1
        !          1257: 
        !          1258: /* Do not break .stabs pseudos into continuations.  */
        !          1259: #define DBX_CONTIN_LENGTH 0
        !          1260: 
        !          1261: /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
        !          1262:    is done just by pretending it is already truncated.  */
        !          1263: #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
        !          1264: 
        !          1265: /* We assume that the store-condition-codes instructions store 0 for false
        !          1266:    and some other value for true.  This is the value stored for true.  */
        !          1267: 
        !          1268: #define STORE_FLAG_VALUE 1
        !          1269: 
        !          1270: /* When a prototype says `char' or `short', really pass an `int'.  */
        !          1271: #define PROMOTE_PROTOTYPES
        !          1272: 
        !          1273: /* Specify the machine mode that pointers have.
        !          1274:    After generation of rtl, the compiler makes no further distinction
        !          1275:    between pointers and any other objects of this machine mode.  */
        !          1276: #define Pmode SImode
        !          1277: 
        !          1278: /* Add any extra modes needed to represent the condition code.
        !          1279: 
        !          1280:    HPPA floating comparisons produce condition codes. */
        !          1281: #define EXTRA_CC_MODES CCFPmode
        !          1282: 
        !          1283: /* Define the names for the modes specified above.  */
        !          1284: #define EXTRA_CC_NAMES "CCFP"
        !          1285: 
        !          1286: /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE,
        !          1287:    return the mode to be used for the comparison.  For floating-point, CCFPmode
        !          1288:    should be used.  CC_NOOVmode should be used when the first operand is a
        !          1289:    PLUS, MINUS, or NEG.  CCmode should be used when no special processing is
        !          1290:    needed.  */
        !          1291: #define SELECT_CC_MODE(OP,X) \
        !          1292:   (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT ? CCFPmode : CCmode)    \
        !          1293: 
        !          1294: /* A function address in a call instruction
        !          1295:    is a byte address (for indexing purposes)
        !          1296:    so give the MEM rtx a byte's mode.  */
        !          1297: #define FUNCTION_MODE SImode
        !          1298:   
        !          1299: /* Define this if addresses of constant functions
        !          1300:    shouldn't be put through pseudo regs where they can be cse'd.
        !          1301:    Desirable on machines where ordinary constants are expensive
        !          1302:    but a CALL with constant address is cheap.  */
        !          1303: #define NO_FUNCTION_CSE
        !          1304: 
        !          1305: /* Compute the cost of computing a constant rtl expression RTX
        !          1306:    whose rtx-code is CODE.  The body of this macro is a portion
        !          1307:    of a switch statement.  If the code is computed here,
        !          1308:    return it with a return statement.  Otherwise, break from the switch.  */
        !          1309: 
        !          1310: #define CONST_COSTS(RTX,CODE,OUTER_CODE) \
        !          1311:   case CONST_INT:                                              \
        !          1312:     if (INTVAL (RTX) == 0) return 0;                           \
        !          1313:     if (INT_14_BITS (RTX)) return 1;                           \
        !          1314:   case CONST:                                                  \
        !          1315:   case LABEL_REF:                                              \
        !          1316:   case SYMBOL_REF:                                             \
        !          1317:     return 2;                                                  \
        !          1318:   case CONST_DOUBLE:                                           \
        !          1319:     return 4;
        !          1320: 
        !          1321: #define ADDRESS_COST(RTX) \
        !          1322:   (GET_CODE (RTX) == REG ? 1 : hppa_address_cost (RTX))
        !          1323: 
        !          1324: /* Compute extra cost of moving data between one register class
        !          1325:    and another.  */
        !          1326: #define REGISTER_MOVE_COST(CLASS1, CLASS2) \
        !          1327:  ((((CLASS1 == FP_REGS || CLASS1 == SNAKE_FP_REGS      \
        !          1328:      || CLASS1 == HI_SNAKE_FP_REGS)                    \
        !          1329:     && (CLASS2 == R1_REGS | CLASS2 == GENERAL_REGS))   \
        !          1330:    || ((CLASS2 == R1_REGS | CLASS1 == GENERAL_REGS)    \
        !          1331:        && (CLASS2 == FP_REGS || CLASS2 == SNAKE_FP_REGS        \
        !          1332:           || CLASS2 == HI_SNAKE_FP_REGS))) ? 6 : 2)    
        !          1333: 
        !          1334: /* Provide the costs of a rtl expression.  This is in the body of a
        !          1335:    switch on CODE.  The purpose for the cost of MULT is to encourage
        !          1336:    `synth_mult' to find a synthetic multiply when reasonable.  */
        !          1337: 
        !          1338: #define RTX_COSTS(X,CODE,OUTER_CODE)                   \
        !          1339:   case MULT:                                           \
        !          1340:     return COSTS_N_INSNS (20);                         \
        !          1341:   case DIV:                                            \
        !          1342:   case UDIV:                                           \
        !          1343:   case MOD:                                            \
        !          1344:   case UMOD:                                           \
        !          1345:     return COSTS_N_INSNS (60);                         \
        !          1346:    case PLUS: /* this includes shNadd insns */         \
        !          1347:     return COSTS_N_INSNS (1) + 2;
        !          1348: 
        !          1349: /* Conditional branches with empty delay slots have a length of two.  */
        !          1350: #define ADJUST_INSN_LENGTH(INSN, LENGTH)       \
        !          1351:   if (GET_CODE (INSN) == CALL_INSN                                     \
        !          1352:       || (GET_CODE (INSN) == JUMP_INSN && ! simplejump_p (insn)))      \
        !          1353:     LENGTH += 1;
        !          1354: 
        !          1355: /* Control the assembler format that we output.  */
        !          1356: 
        !          1357: /* Output at beginning of assembler file.  */
        !          1358: 
        !          1359: #define ASM_FILE_START(FILE) \
        !          1360: do { fprintf (FILE, "\t.SPACE $PRIVATE$\n\
        !          1361: \t.SUBSPA $DATA$,QUAD=1,ALIGN=8,ACCESS=31\n\
        !          1362: \t.SPACE $TEXT$\n\
        !          1363: \t.SUBSPA $LIT$,QUAD=0,ALIGN=8,ACCESS=44\n\
        !          1364: \t.SUBSPA $CODE$,QUAD=0,ALIGN=8,ACCESS=44,CODE_ONLY\n\
        !          1365: \t.IMPORT $global$,DATA\n\
        !          1366: \t.IMPORT $$dyncall,MILLICODE\n");\
        !          1367:      if (profile_flag)\
        !          1368:        fprintf (FILE, "\t.IMPORT __gcc_mcount, CODE\n");\
        !          1369:    } while (0)
        !          1370: 
        !          1371: /* Output to assembler file text saying following lines
        !          1372:    may contain character constants, extra white space, comments, etc.  */
        !          1373: 
        !          1374: #define ASM_APP_ON ""
        !          1375: 
        !          1376: /* Output to assembler file text saying following lines
        !          1377:    no longer contain unusual constructs.  */
        !          1378: 
        !          1379: #define ASM_APP_OFF ""
        !          1380: 
        !          1381: /* We don't yet know how to identify GCC to HP series 800.  */
        !          1382: #define ASM_IDENTIFY_GCC(FILE) fprintf (FILE, "; gcc_compiled.:\n")
        !          1383: 
        !          1384: /* Output before code.  */
        !          1385: 
        !          1386: /* Supposedly the assembler rejects the command if there is no tab!  */
        !          1387: #define TEXT_SECTION_ASM_OP "\t.SPACE $TEXT$\n\t.SUBSPA $CODE$\n"
        !          1388: 
        !          1389: /* Output before writable data.  */
        !          1390: 
        !          1391: /* Supposedly the assembler rejects the command if there is no tab!  */
        !          1392: #define DATA_SECTION_ASM_OP "\t.SPACE $PRIVATE$\n\t.SUBSPA $DATA$\n"
        !          1393: 
        !          1394: /* How to refer to registers in assembler output.
        !          1395:    This sequence is indexed by compiler's hard-register-number (see above).  */
        !          1396: 
        !          1397: #define REGISTER_NAMES \
        !          1398: {"0", "%r1", "%r2", "%r3", "%r4", "%r5", "%r6", "%r7",                 \
        !          1399:  "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15",         \
        !          1400:  "%r16", "%r17", "%r18", "%r19", "%r20", "%r21", "%r22", "%r23",       \
        !          1401:  "%r24", "%r25", "%r26", "%r27", "%r28", "%r29", "%r30", "%r31",       \
        !          1402:  "%fr0", "%fr1", "%fr2", "%fr3", "%fr4", "%fr5", "%fr6", "%fr7",       \
        !          1403:  "%fr8", "%fr9", "%fr10", "%fr11", "%fr12", "%fr13", "%fr14", "%fr15", \
        !          1404:  "%fr0", "%fr0R", "%fr1", "%fr1R", "%fr2", "%fr2R", "%fr3", "%fr3R",   \
        !          1405:  "%fr4", "%fr4R", "%fr5", "%fr5R", "%fr6", "%fr6R", "%fr7", "%fr7R",   \
        !          1406:  "%fr8", "%fr8R", "%fr9", "%fr9R", "%fr10", "%fr10R", "%fr11", "%fr11R",\
        !          1407:  "%fr12", "%fr12R", "%fr13", "%fr13R", "%fr14", "%fr14R", "%fr15", "%fr15R",\
        !          1408:  "%fr16", "%fr16R", "%fr17", "%fr17R", "%fr18", "%fr18R", "%fr19", "%fr19R",\
        !          1409:  "%fr20", "%fr20R", "%fr21", "%fr21R", "%fr22", "%fr22R", "%fr23", "%fr23R",\
        !          1410:  "%fr24", "%fr24R", "%fr25", "%fr25R", "%fr26", "%fr26R", "%fr27", "%fr27R",\
        !          1411:  "%fr28", "%fr28R", "%fr29", "%fr29R", "%fr30", "%fr30R", "%fr31", "%fr31R",\
        !          1412:  "SAR"}
        !          1413: 
        !          1414: /* How to renumber registers for dbx and gdb.  */
        !          1415: 
        !          1416: #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
        !          1417: 
        !          1418: /* This is how to output the definition of a user-level label named NAME,
        !          1419:    such as the label on a static function or variable NAME.  */
        !          1420: 
        !          1421: #define ASM_OUTPUT_LABEL(FILE, NAME)   \
        !          1422:   do { assemble_name (FILE, NAME); fputc ('\n', FILE); } while (0)
        !          1423: 
        !          1424: /* This is how to output a command to make the user-level label named NAME
        !          1425:    defined for reference from other files.  */
        !          1426: 
        !          1427: #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME)  \
        !          1428:   do { fputs ("\t.IMPORT ", FILE);                             \
        !          1429:         assemble_name (FILE, NAME);                            \
        !          1430:        if (TREE_CODE (DECL) == VAR_DECL && ! TREE_READONLY (DECL))             \
        !          1431:         fputs (",DATA\n", FILE);                               \
        !          1432:        else                                                    \
        !          1433:         fputs (",CODE\n", FILE);                               \
        !          1434:      } while (0)
        !          1435: 
        !          1436: /* hpux ld doesn't output the object file name, or anything useful at
        !          1437:    all, to indicate the start of an object file's symbols. This screws
        !          1438:    up gdb, so we'll output this magic cookie at the end of an object
        !          1439:    file with debugging symbols */
        !          1440: 
        !          1441: #define ASM_FILE_END(FILE) \
        !          1442:   do { if (write_symbols == DBX_DEBUG)\
        !          1443:         { fputs (TEXT_SECTION_ASM_OP, FILE);\
        !          1444:           fputs (".stabs \"end_file.\",4,0,0,Ltext_end\nLtext_end:\n",\
        !          1445:                  (FILE));\
        !          1446:         }\
        !          1447:      } while (0)
        !          1448: 
        !          1449: /* The bogus HP assembler requires ALL external references to be 
        !          1450:    "imported", even library calls. They look a bit different, so
        !          1451:    here's this macro. */
        !          1452: 
        !          1453: #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, RTL) \
        !          1454:   do { fputs ("\t.IMPORT ", FILE);                                     \
        !          1455:        assemble_name (FILE, XSTR ((RTL), 0));                          \
        !          1456:        fputs (",CODE\n", FILE);                                                \
        !          1457:      } while (0)
        !          1458: 
        !          1459: #define ASM_GLOBALIZE_LABEL(FILE, NAME)                                        \
        !          1460:   do { fputs ("\t.EXPORT ", FILE); assemble_name (FILE, NAME);         \
        !          1461:        fputs ("\n", FILE);} while (0)
        !          1462: 
        !          1463: /* This is how to output a reference to a user-level label named NAME.
        !          1464:    `assemble_name' uses this.  */
        !          1465: 
        !          1466: #define ASM_OUTPUT_LABELREF(FILE,NAME) \
        !          1467:   fprintf (FILE, "%s", NAME)
        !          1468: 
        !          1469: /* This is how to output an internal numbered label where
        !          1470:    PREFIX is the class of label and NUM is the number within the class.  */
        !          1471: 
        !          1472: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)     \
        !          1473:   fprintf (FILE, "%s$%04d\n", PREFIX, NUM)
        !          1474: 
        !          1475: /* This is how to store into the string LABEL
        !          1476:    the symbol_ref name of an internal numbered label where
        !          1477:    PREFIX is the class of label and NUM is the number within the class.
        !          1478:    This is suitable for output with `assemble_name'.  */
        !          1479: 
        !          1480: #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)  \
        !          1481:   sprintf (LABEL, "*%s$%04d", PREFIX, NUM)
        !          1482: 
        !          1483: /* This is how to output an assembler line defining a `double' constant.  */
        !          1484: 
        !          1485: #define ASM_OUTPUT_DOUBLE(FILE,VALUE)  \
        !          1486:   do { union { double d; int i[2];} __u;       \
        !          1487:     __u.d = (VALUE);                           \
        !          1488:     fprintf (FILE, "\t; .double %.20e\n\t.word %d ; = 0x%x\n\t.word %d ; = 0x%x\n",    \
        !          1489:             __u.d, __u.i[0], __u.i[0], __u.i[1], __u.i[1]);    \
        !          1490:   } while (0)
        !          1491: 
        !          1492: /* This is how to output an assembler line defining a `float' constant.  */
        !          1493: 
        !          1494: #define ASM_OUTPUT_FLOAT(FILE,VALUE)  \
        !          1495:   do { union { float f; int i;} __u;           \
        !          1496:     __u.f = (VALUE);                           \
        !          1497:     fprintf (FILE, "\t; .float %.12e\n\t.word %d ; = 0x%x\n", __u.f, __u.i, __u.i); \
        !          1498:   } while (0)
        !          1499: 
        !          1500: /* This is how to output an assembler line defining an `int' constant.  */
        !          1501: 
        !          1502: #define ASM_OUTPUT_INT(FILE,VALUE)  \
        !          1503: ( fprintf (FILE, "\t.word "),                  \
        !          1504:   output_addr_const (FILE, (VALUE)),           \
        !          1505:   fprintf (FILE, "\n"))
        !          1506: 
        !          1507: /* Likewise for `short' and `char' constants.  */
        !          1508: 
        !          1509: #define ASM_OUTPUT_SHORT(FILE,VALUE)  \
        !          1510: ( fprintf (FILE, "\t.half "),                  \
        !          1511:   output_addr_const (FILE, (VALUE)),           \
        !          1512:   fprintf (FILE, "\n"))
        !          1513: 
        !          1514: #define ASM_OUTPUT_CHAR(FILE,VALUE)  \
        !          1515: ( fprintf (FILE, "\t.byte "),                  \
        !          1516:   output_addr_const (FILE, (VALUE)),           \
        !          1517:   fprintf (FILE, "\n"))
        !          1518: 
        !          1519: /* This is how to output an assembler line for a numeric constant byte.  */
        !          1520: 
        !          1521: #define ASM_OUTPUT_BYTE(FILE,VALUE)  \
        !          1522:   fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
        !          1523: 
        !          1524: #define ASM_OUTPUT_ASCII(FILE, P, SIZE)  \
        !          1525:   output_ascii ((FILE), (P), (SIZE))
        !          1526: 
        !          1527: #define ASM_OUTPUT_REG_PUSH(FILE,REGNO)  \
        !          1528:   fprintf (FILE, "\tstws,mb %s,4(0,30)\n", reg_names[REGNO])
        !          1529: 
        !          1530: /* This is how to output an insn to pop a register from the stack.
        !          1531:    It need not be very fast code.  */
        !          1532: 
        !          1533: #define ASM_OUTPUT_REG_POP(FILE,REGNO)  \
        !          1534:   fprintf (FILE, "\tldws,ma -4(0,30),%s\n", reg_names[REGNO])
        !          1535: 
        !          1536: /* This is how to output an element of a case-vector that is absolute.
        !          1537:    Note that this method makes filling these branch delay slots
        !          1538:    virtually impossible.  */
        !          1539: 
        !          1540: #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
        !          1541:   fprintf (FILE, "\tb L$%04d\n\tnop\n", VALUE)
        !          1542: 
        !          1543: /* This is how to output an element of a case-vector that is relative.
        !          1544:    (the hp9k800 does not use such vectors,
        !          1545:    but we must define this macro anyway.)  */
        !          1546: 
        !          1547: #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL)  \
        !          1548:   fprintf (FILE, "\tword L%d-L%d\n", VALUE, REL)
        !          1549: 
        !          1550: /* This is how to output an assembler line
        !          1551:    that says to advance the location counter
        !          1552:    to a multiple of 2**LOG bytes.  */
        !          1553: 
        !          1554: #define ASM_OUTPUT_ALIGN(FILE,LOG)     \
        !          1555:     fprintf (FILE, "\t.align %d\n", (1<<(LOG)))
        !          1556: 
        !          1557: #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
        !          1558:   fprintf (FILE, "\t.blockz %d\n", (SIZE))
        !          1559: 
        !          1560: /* This says how to output an assembler line
        !          1561:    to define a global common symbol.  */
        !          1562: 
        !          1563: #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
        !          1564: ( data_section (),                                     \
        !          1565:   assemble_name ((FILE), (NAME)),                      \
        !          1566:   fputs ("\t.comm ", (FILE)),                          \
        !          1567:   fprintf ((FILE), "%d\n", (ROUNDED)))
        !          1568: 
        !          1569: /* This says how to output an assembler line
        !          1570:    to define a local common symbol.  */
        !          1571: 
        !          1572: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
        !          1573: ( data_section (),                                     \
        !          1574:   fprintf ((FILE), "\t.align %d\n", (SIZE) <= 4 ? 4 : 8),      \
        !          1575:   assemble_name ((FILE), (NAME)),                              \
        !          1576:   fprintf ((FILE), "\n\t.blockz %d\n", (ROUNDED)))
        !          1577: 
        !          1578: /* Store in OUTPUT a string (made with alloca) containing
        !          1579:    an assembler-name for a local static variable named NAME.
        !          1580:    LABELNO is an integer which is different for each call.  */
        !          1581: 
        !          1582: #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
        !          1583: ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 12),   \
        !          1584:   sprintf ((OUTPUT), "%s___%d", (NAME), (LABELNO)))
        !          1585: 
        !          1586: /* Define the parentheses used to group arithmetic operations
        !          1587:    in assembler code.  */
        !          1588: 
        !          1589: #define ASM_OPEN_PAREN "("
        !          1590: #define ASM_CLOSE_PAREN ")"
        !          1591: 
        !          1592: /* Define results of standard character escape sequences.  */
        !          1593: #define TARGET_BELL 007
        !          1594: #define TARGET_BS 010
        !          1595: #define TARGET_TAB 011
        !          1596: #define TARGET_NEWLINE 012
        !          1597: #define TARGET_VT 013
        !          1598: #define TARGET_FF 014
        !          1599: #define TARGET_CR 015
        !          1600: 
        !          1601: #define PRINT_OPERAND_PUNCT_VALID_P(CHAR) \
        !          1602:   ((CHAR) == '@' || (CHAR) == '#' || (CHAR) == '*' || (CHAR) == '^')
        !          1603: 
        !          1604: /* Print operand X (an rtx) in assembler syntax to file FILE.
        !          1605:    CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
        !          1606:    For `%' followed by punctuation, CODE is the punctuation and X is null.
        !          1607: 
        !          1608:    On the hp9k800, the CODE can be `r', meaning this is a register-only operand
        !          1609:    and an immediate zero should be represented as `r0'.
        !          1610: 
        !          1611:    Several % codes are defined:
        !          1612:    O an operation
        !          1613:    C compare conditions
        !          1614:    N extract conditions
        !          1615:    M modifier to handle preincrement addressing for memory refs.
        !          1616:    F modifier to handle preincrement addressing for fp memory refs */
        !          1617: 
        !          1618: #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE)
        !          1619: 
        !          1620: 
        !          1621: /* Print a memory address as an operand to reference that memory location.  */
        !          1622: 
        !          1623: #define PRINT_OPERAND_ADDRESS(FILE, ADDR)  \
        !          1624: { register rtx addr = ADDR;                                            \
        !          1625:   register rtx base;                                                   \
        !          1626:   int offset;                                                          \
        !          1627:   switch (GET_CODE (addr))                                             \
        !          1628:     {                                                                  \
        !          1629:     case REG:                                                          \
        !          1630:       fprintf (FILE, "0(0,%s)", reg_names [REGNO (addr)]);             \
        !          1631:       break;                                                           \
        !          1632:     case PLUS:                                                         \
        !          1633:       if (GET_CODE (XEXP (addr, 0)) == CONST_INT)                      \
        !          1634:        offset = INTVAL (XEXP (addr, 0)), base = XEXP (addr, 1);        \
        !          1635:       else if (GET_CODE (XEXP (addr, 1)) == CONST_INT)                 \
        !          1636:        offset = INTVAL (XEXP (addr, 1)), base = XEXP (addr, 0);        \
        !          1637:       else                                                             \
        !          1638:        abort ();                                                       \
        !          1639:       fprintf (FILE, "%d(0,%s)", offset, reg_names [REGNO (base)]);    \
        !          1640:       break;                                                           \
        !          1641:     case LO_SUM:                                                       \
        !          1642:       fputs ("R'", FILE);                                              \
        !          1643:       output_global_address (FILE, XEXP (addr, 1));                    \
        !          1644:       fputs ("(", FILE);                                               \
        !          1645:       output_operand (XEXP (addr, 0), 0);                              \
        !          1646:       fputs (")", FILE);                                               \
        !          1647:       break;                                                           \
        !          1648:     case CONST_INT:                                                    \
        !          1649:       fprintf (FILE, "%d(0,0)", INTVAL (addr));                                \
        !          1650:       break;                                                           \
        !          1651:     default:                                                           \
        !          1652:       output_addr_const (FILE, addr);                                  \
        !          1653:     }}
        !          1654: 
        !          1655: 
        !          1656: #define SMALL_INT(OP) INT_14_BITS (OP)
        !          1657: /* Define functions in pa.c and used in insn-output.c.  */
        !          1658: 
        !          1659: extern char *output_move_double ();
        !          1660: extern char *output_fp_move_double ();
        !          1661: extern char *output_block_move ();
        !          1662: extern char *output_scc_insn ();
        !          1663: extern char *output_cbranch ();
        !          1664: extern char *output_return ();
        !          1665: extern char *output_floatsisf2 ();
        !          1666: extern char *output_floatsidf2 ();
        !          1667: extern char *output_mul_insn ();
        !          1668: extern char *output_div_insn ();
        !          1669: extern char *output_mod_insn ();
        !          1670: extern void output_arg_descriptor ();
        !          1671: extern void output_global_address ();
        !          1672: extern struct rtx_def *legitimize_pic_address ();

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