Return to alpha.h CVS log

Up to [GCC 2.x] / gcc / config

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

1.1     ! root        1: /* Definitions of target machine for GNU compiler, for DEC Alpha.
        !             2:    Copyright (C) 1992 Free Software Foundation, Inc.
        !             3:    Contributed by Richard Kenner ([email protected])
        !             4: 
        !             5: This file is part of GNU CC.
        !             6: 
        !             7: GNU CC is free software; you can redistribute it and/or modify
        !             8: it under the terms of the GNU General Public License as published by
        !             9: the Free Software Foundation; either version 2, or (at your option)
        !            10: any later version.
        !            11: 
        !            12: GNU CC is distributed in the hope that it will be useful,
        !            13: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            14: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            15: GNU General Public License for more details.
        !            16: 
        !            17: You should have received a copy of the GNU General Public License
        !            18: along with GNU CC; see the file COPYING.  If not, write to
        !            19: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            20: 
        !            21: 
        !            22: /* Names to predefine in the preprocessor for this target machine.  */
        !            23: 
        !            24: #define CPP_PREDEFINES "\
        !            25: -Dunix -D__osf__ -D__alpha -D__alpha__ -D_LONGLONG -DSYSTYPE_BSD  \
        !            26: -D_SYSTYPE_BSD"
        !            27: 
        !            28: /* Write out the correct language type definition for the header files.  */
        !            29: #define CPP_SPEC "\
        !            30: %{.c:  -D__LANGUAGE_C__  -D__LANGUAGE_C %{!ansi:-DLANGUAGE_C}}  \
        !            31: %{.h:  -D__LANGUAGE_C__  -D__LANGUAGE_C %{!ansi:-DLANGUAGE_C}}  \
        !            32: %{.S:  -D__LANGUAGE_ASSEMBLY__ -D__LANGUAGE_ASSEMBLY %{!ansi:-DLANGUAGE_ASSEMBLY}} \
        !            33: %{.cc: -D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS} \
        !            34: %{.cxx:        -D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS} \
        !            35: %{.C:  -D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS} \
        !            36: %{.m:  -D__LANGUAGE_OBJECTIVE_C__ -D__LANGUAGE_OBJECTIVE_C}"
        !            37: 
        !            38: /* Set the spec to use for signed char.  The default tests the above macro
        !            39:    but DEC's compiler can't handle the conditional in a "constant"
        !            40:    operand.  */
        !            41: 
        !            42: #define SIGNED_CHAR_SPEC "%{funsigned-char:-D__CHAR_UNSIGNED__}"
        !            43: 
        !            44: /* No point in running CPP on our assembler output.  */
        !            45: #define ASM_SPEC "-nocpp"
        !            46: 
        !            47: /* Right now Alpha OSF/1 doesn't seem to have debugging or profiled 
        !            48:    libraries.  */
        !            49: 
        !            50: #define LIB_SPEC "-lc"
        !            51: 
        !            52: /* Print subsidiary information on the compiler version in use.  */
        !            53: #define TARGET_VERSION
        !            54: 
        !            55: /* Define the location for the startup file on OSF/1 for Alpha.  */
        !            56: 
        !            57: #define MD_STARTFILE_PREFIX "/usr/lib/cmplrs/cc/"
        !            58: 
        !            59: /* Run-time compilation parameters selecting different hardware subsets.  */
        !            60: 
        !            61: extern int target_flags;
        !            62: 
        !            63: /* This means that floating-point support exists in the target implementation
        !            64:    of the Alpha architecture.  This is usually the default.  */
        !            65: 
        !            66: #define TARGET_FP      (target_flags & 1)
        !            67: 
        !            68: /* This means that floating-point registers are allowed to be used.  Note
        !            69:    that Alpha implementations without FP operations are required to
        !            70:    provide the FP registers.  */
        !            71: 
        !            72: #define TARGET_FPREGS (target_flags & 2)
        !            73: 
        !            74: /* Macro to define tables used to set the flags.
        !            75:    This is a list in braces of pairs in braces,
        !            76:    each pair being { "NAME", VALUE }
        !            77:    where VALUE is the bits to set or minus the bits to clear.
        !            78:    An empty string NAME is used to identify the default VALUE.  */
        !            79: 
        !            80: #define TARGET_SWITCHES                        \
        !            81:   { {"no-soft-float", 1},              \
        !            82:     {"soft-float", -1},                        \
        !            83:     {"fp-regs", 2},                    \
        !            84:     {"no-fp-regs", -3},                        \
        !            85:     {"", TARGET_DEFAULT} }
        !            86: 
        !            87: #define TARGET_DEFAULT 3
        !            88: 
        !            89: /* Define this macro to change register usage conditional on target flags.
        !            90: 
        !            91:    On the Alpha, we use this to disable the floating-point registers when
        !            92:    they don't exist.  */
        !            93: 
        !            94: #define CONDITIONAL_REGISTER_USAGE     \
        !            95:   if (! TARGET_FPREGS)                 \
        !            96:     for (i = 32; i < 64; i++)          \
        !            97:       fixed_regs[i] = call_used_regs[i] = 1;
        !            98: 
        !            99: /* Define this to change the optimizations performed by default.  */
        !           100: 
        !           101: #define OPTIMIZATION_OPTIONS(LEVEL)    \
        !           102: {                                      \
        !           103:   if ((LEVEL) > 0)                     \
        !           104:     {                                  \
        !           105:       flag_force_addr = 1;             \
        !           106:       flag_force_mem = 1;              \
        !           107:       flag_omit_frame_pointer = 1;     \
        !           108:     }                                  \
        !           109: }
        !           110: 
        !           111: /* target machine storage layout */
        !           112: 
        !           113: /* Define the size of `int'.  The default is the same as the word size.  */
        !           114: #define INT_TYPE_SIZE 32
        !           115: 
        !           116: /* Define the size of `long long'.  The default is the twice the word size.  */
        !           117: #define LONG_LONG_TYPE_SIZE 64
        !           118: 
        !           119: /* The two floating-point formats we support are S-floating, which is
        !           120:    4 bytes, and T-floating, which is 8 bytes.  `float' is S and `double'
        !           121:    and `long double' are T.  */
        !           122: 
        !           123: #define FLOAT_TYPE_SIZE 32
        !           124: #define DOUBLE_TYPE_SIZE 64
        !           125: #define LONG_DOUBLE_TYPE_SIZE 64
        !           126: 
        !           127: #define WCHAR_TYPE "short unsigned int"
        !           128: #define WCHAR_TYPE_SIZE 16
        !           129: 
        !           130: /* Define this macro if it is advisible to hold scalars in registers
        !           131:    in a wider mode than that declared by the program.  In such cases, 
        !           132:    the value is constrained to be within the bounds of the declared
        !           133:    type, but kept valid in the wider mode.  The signedness of the
        !           134:    extension may differ from that of the type.
        !           135: 
        !           136:    For Alpha, we always store objects in a full register.  32-bit objects
        !           137:    are always sign-extended, but smaller objects retain their signedness.  */
        !           138: 
        !           139: #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE)  \
        !           140:   if (GET_MODE_CLASS (MODE) == MODE_INT                \
        !           141:       && GET_MODE_SIZE (MODE) < UNITS_PER_WORD)        \
        !           142:     {                                          \
        !           143:       if ((MODE) == SImode)                    \
        !           144:        (UNSIGNEDP) = 0;                        \
        !           145:       (MODE) = DImode;                         \
        !           146:     }
        !           147: 
        !           148: /* Define this if function arguments should also be promoted using the above
        !           149:    procedure.  */
        !           150: 
        !           151: #define PROMOTE_FUNCTION_ARGS
        !           152: 
        !           153: /* Likewise, if the function return value is promoted.  */
        !           154: 
        !           155: #define PROMOTE_FUNCTION_RETURN
        !           156: 
        !           157: /* Define this if most significant bit is lowest numbered
        !           158:    in instructions that operate on numbered bit-fields.
        !           159: 
        !           160:    There are no such instructions on the Alpha, but the documentation
        !           161:    is little endian.  */
        !           162: #define BITS_BIG_ENDIAN 0
        !           163: 
        !           164: /* Define this if most significant byte of a word is the lowest numbered.
        !           165:    This is false on the Alpha.  */
        !           166: #define BYTES_BIG_ENDIAN 0
        !           167: 
        !           168: /* Define this if most significant word of a multiword number is lowest
        !           169:    numbered.
        !           170: 
        !           171:    For Alpha we can decide arbitrarily since there are no machine instructions
        !           172:    for them.  Might as well be consistent with bytes. */
        !           173: #define WORDS_BIG_ENDIAN 0
        !           174: 
        !           175: /* number of bits in an addressable storage unit */
        !           176: #define BITS_PER_UNIT 8
        !           177: 
        !           178: /* Width in bits of a "word", which is the contents of a machine register.
        !           179:    Note that this is not necessarily the width of data type `int';
        !           180:    if using 16-bit ints on a 68000, this would still be 32.
        !           181:    But on a machine with 16-bit registers, this would be 16.  */
        !           182: #define BITS_PER_WORD 64
        !           183: 
        !           184: /* Width of a word, in units (bytes).  */
        !           185: #define UNITS_PER_WORD 8
        !           186: 
        !           187: /* Width in bits of a pointer.
        !           188:    See also the macro `Pmode' defined below.  */
        !           189: #define POINTER_SIZE 64
        !           190: 
        !           191: /* Allocation boundary (in *bits*) for storing arguments in argument list.  */
        !           192: #define PARM_BOUNDARY 64
        !           193: 
        !           194: /* Boundary (in *bits*) on which stack pointer should be aligned.  */
        !           195: #define STACK_BOUNDARY 64
        !           196: 
        !           197: /* Allocation boundary (in *bits*) for the code of a function.  */
        !           198: #define FUNCTION_BOUNDARY 64
        !           199: 
        !           200: /* Alignment of field after `int : 0' in a structure.  */
        !           201: #define EMPTY_FIELD_BOUNDARY 64
        !           202: 
        !           203: /* Every structure's size must be a multiple of this.  */
        !           204: #define STRUCTURE_SIZE_BOUNDARY 8
        !           205: 
        !           206: /* A bitfield declared as `int' forces `int' alignment for the struct.  */
        !           207: #define PCC_BITFIELD_TYPE_MATTERS 1
        !           208: 
        !           209: /* Align loop starts for optimal branching. 
        !           210: 
        !           211:    Don't do this until they fix the assembler.  */
        !           212: 
        !           213: /* #define ASM_OUTPUT_LOOP_ALIGN(FILE) \
        !           214:   ASM_OUTPUT_ALIGN (FILE, 5)  */
        !           215: 
        !           216: /* This is how to align an instruction for optimal branching.
        !           217:    On Alpha we'll get better performance by aligning on a quadword
        !           218:    boundary.  */
        !           219: #define ASM_OUTPUT_ALIGN_CODE(FILE)    \
        !           220:   ASM_OUTPUT_ALIGN ((FILE), 4)
        !           221: 
        !           222: /* No data type wants to be aligned rounder than this.  */
        !           223: #define BIGGEST_ALIGNMENT 64
        !           224: 
        !           225: /* Make strings word-aligned so strcpy from constants will be faster.  */
        !           226: #define CONSTANT_ALIGNMENT(EXP, ALIGN)  \
        !           227:   (TREE_CODE (EXP) == STRING_CST       \
        !           228:    && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
        !           229: 
        !           230: /* Make arrays of chars word-aligned for the same reasons.  */
        !           231: #define DATA_ALIGNMENT(TYPE, ALIGN)            \
        !           232:   (TREE_CODE (TYPE) == ARRAY_TYPE              \
        !           233:    && TYPE_MODE (TREE_TYPE (TYPE)) == QImode   \
        !           234:    && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
        !           235: 
        !           236: /* Set this non-zero if move instructions will actually fail to work
        !           237:    when given unaligned data.
        !           238: 
        !           239:    Since we get an error message when we do one, call them invalid.  */
        !           240: 
        !           241: #define STRICT_ALIGNMENT 1
        !           242: 
        !           243: /* Set this non-zero if unaligned move instructions are extremely slow.
        !           244: 
        !           245:    On the Alpha, they trap.  */
        !           246: /* #define SLOW_UNALIGNED_ACCESS 1  */
        !           247: 
        !           248: /* Standard register usage.  */
        !           249: 
        !           250: /* Number of actual hardware registers.
        !           251:    The hardware registers are assigned numbers for the compiler
        !           252:    from 0 to just below FIRST_PSEUDO_REGISTER.
        !           253:    All registers that the compiler knows about must be given numbers,
        !           254:    even those that are not normally considered general registers.
        !           255: 
        !           256:    We define all 32 integer registers, even though $31 is always zero,
        !           257:    and all 32 floating-point registers, even though $f31 is also
        !           258:    always zero.  We do not bother defining the FP status register and
        !           259:    there are no other registers.  */
        !           260: 
        !           261: #define FIRST_PSEUDO_REGISTER 64
        !           262: 
        !           263: /* 1 for registers that have pervasive standard uses
        !           264:    and are not available for the register allocator.  */
        !           265: 
        !           266: #define FIXED_REGISTERS  \
        !           267:  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           268:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, \
        !           269:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           270:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }
        !           271: 
        !           272: /* 1 for registers not available across function calls.
        !           273:    These must include the FIXED_REGISTERS and also any
        !           274:    registers that can be used without being saved.
        !           275:    The latter must include the registers where values are returned
        !           276:    and the register where structure-value addresses are passed.
        !           277:    Aside from that, you can include as many other registers as you like.  */
        !           278: #define CALL_USED_REGISTERS  \
        !           279:  {1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, \
        !           280:   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, \
        !           281:   1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
        !           282:   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }
        !           283: 
        !           284: /* List the order in which to allocate registers.  Each register must be
        !           285:    listed once, even those in FIXED_REGISTERS.
        !           286: 
        !           287:    We allocate in the following order:
        !           288:    $f1                 (nonsaved floating-point register)
        !           289:    $f10-$f15           (likewise)
        !           290:    $f22-$f30           (likewise)
        !           291:    $f21-$f16           (likewise, but input args)
        !           292:    $f0                 (nonsaved, but return value)
        !           293:    $f2-$f9             (saved floating-point registers)
        !           294:    $1-$8               (nonsaved integer registers)
        !           295:    $22-$25             (likewise)
        !           296:    $28                 (likewise)
        !           297:    $0                  (likewise, but return value)
        !           298:    $21-$16             (likewise, but input args)
        !           299:    $27                 (procedure value)
        !           300:    $9-$14              (saved integer registers)
        !           301:    $26                 (return PC)
        !           302:    $15                 (frame pointer)
        !           303:    $29                 (global pointer)
        !           304:    $30, $31, $f31      (stack pointer and always zero)  */
        !           305: 
        !           306: #define REG_ALLOC_ORDER                \
        !           307:   {33,                                 \
        !           308:    42, 43, 44, 45,                     \
        !           309:    54, 55, 56, 57, 58, 59, 60, 61, 62, \
        !           310:    53, 52, 51, 50, 49, 48,             \
        !           311:    32,                                 \
        !           312:    34, 35, 36, 37, 38, 39, 40, 41,     \
        !           313:    1, 2, 3, 4, 5, 6, 7, 8,             \
        !           314:    22, 23, 24, 25,                     \
        !           315:    28,                                 \
        !           316:    0,                                  \
        !           317:    21, 20, 19, 18, 17, 16,             \
        !           318:    27,                                 \
        !           319:    9, 10, 11, 12, 13, 14,              \
        !           320:    26,                                 \
        !           321:    15,                                 \
        !           322:    29,                                 \
        !           323:    30, 31, 63 }
        !           324: 
        !           325: /* Return number of consecutive hard regs needed starting at reg REGNO
        !           326:    to hold something of mode MODE.
        !           327:    This is ordinarily the length in words of a value of mode MODE
        !           328:    but can be less for certain modes in special long registers.  */
        !           329: 
        !           330: #define HARD_REGNO_NREGS(REGNO, MODE)   \
        !           331:   ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
        !           332: 
        !           333: /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
        !           334:    On Alpha, the integer registers can hold any mode.  The floating-point
        !           335:    registers can hold 32-bit and 64-bit integers as well, but not 16-bit
        !           336:    or 8-bit values.  If we only allowed the larger integers into FP registers,
        !           337:    we'd have to say that QImode and SImode aren't tiable, which is a
        !           338:    pain.  So say all registers can hold everything and see how that works.  */
        !           339: 
        !           340: #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
        !           341: 
        !           342: /* Value is 1 if it is a good idea to tie two pseudo registers
        !           343:    when one has mode MODE1 and one has mode MODE2.
        !           344:    If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
        !           345:    for any hard reg, then this must be 0 for correct output.  */
        !           346: 
        !           347: #define MODES_TIEABLE_P(MODE1, MODE2) 1
        !           348: 
        !           349: /* Specify the registers used for certain standard purposes.
        !           350:    The values of these macros are register numbers.  */
        !           351: 
        !           352: /* Alpha pc isn't overloaded on a register that the compiler knows about.  */
        !           353: /* #define PC_REGNUM  */
        !           354: 
        !           355: /* Register to use for pushing function arguments.  */
        !           356: #define STACK_POINTER_REGNUM 30
        !           357: 
        !           358: /* Base register for access to local variables of the function.  */
        !           359: #define FRAME_POINTER_REGNUM 15
        !           360: 
        !           361: /* Value should be nonzero if functions must have frame pointers.
        !           362:    Zero means the frame pointer need not be set up (and parms
        !           363:    may be accessed via the stack pointer) in functions that seem suitable.
        !           364:    This is computed in `reload', in reload1.c.  */
        !           365: #define FRAME_POINTER_REQUIRED 0
        !           366: 
        !           367: /* Base register for access to arguments of the function.  */
        !           368: #define ARG_POINTER_REGNUM 15
        !           369: 
        !           370: /* Register in which static-chain is passed to a function. 
        !           371: 
        !           372:    For the Alpha, this is based on an example; the calling sequence
        !           373:    doesn't seem to specify this.  */
        !           374: #define STATIC_CHAIN_REGNUM 1
        !           375: 
        !           376: /* Register in which address to store a structure value
        !           377:    arrives in the function.  On the Alpha, the address is passed
        !           378:    as a hidden argument.  */
        !           379: #define STRUCT_VALUE 0
        !           380: 
        !           381: /* Define the classes of registers for register constraints in the
        !           382:    machine description.  Also define ranges of constants.
        !           383: 
        !           384:    One of the classes must always be named ALL_REGS and include all hard regs.
        !           385:    If there is more than one class, another class must be named NO_REGS
        !           386:    and contain no registers.
        !           387: 
        !           388:    The name GENERAL_REGS must be the name of a class (or an alias for
        !           389:    another name such as ALL_REGS).  This is the class of registers
        !           390:    that is allowed by "g" or "r" in a register constraint.
        !           391:    Also, registers outside this class are allocated only when
        !           392:    instructions express preferences for them.
        !           393: 
        !           394:    The classes must be numbered in nondecreasing order; that is,
        !           395:    a larger-numbered class must never be contained completely
        !           396:    in a smaller-numbered class.
        !           397: 
        !           398:    For any two classes, it is very desirable that there be another
        !           399:    class that represents their union.  */
        !           400:    
        !           401: enum reg_class { NO_REGS, GENERAL_REGS, FLOAT_REGS, ALL_REGS,
        !           402:                 LIM_REG_CLASSES };
        !           403: 
        !           404: #define N_REG_CLASSES (int) LIM_REG_CLASSES
        !           405: 
        !           406: /* Give names of register classes as strings for dump file.   */
        !           407: 
        !           408: #define REG_CLASS_NAMES                                \
        !           409:  {"NO_REGS", "GENERAL_REGS", "FLOAT_REGS", "ALL_REGS" }
        !           410: 
        !           411: /* Define which registers fit in which classes.
        !           412:    This is an initializer for a vector of HARD_REG_SET
        !           413:    of length N_REG_CLASSES.  */
        !           414: 
        !           415: #define REG_CLASS_CONTENTS     \
        !           416:   { {0, 0}, {~0, 0}, {0, ~0}, {~0, ~0} }
        !           417: 
        !           418: /* The same information, inverted:
        !           419:    Return the class number of the smallest class containing
        !           420:    reg number REGNO.  This could be a conditional expression
        !           421:    or could index an array.  */
        !           422: 
        !           423: #define REGNO_REG_CLASS(REGNO) ((REGNO) >= 32 ? FLOAT_REGS : GENERAL_REGS)
        !           424: 
        !           425: /* The class value for index registers, and the one for base regs.  */
        !           426: #define INDEX_REG_CLASS NO_REGS
        !           427: #define BASE_REG_CLASS GENERAL_REGS
        !           428: 
        !           429: /* Get reg_class from a letter such as appears in the machine description.  */
        !           430: 
        !           431: #define REG_CLASS_FROM_LETTER(C)       \
        !           432:  ((C) == 'f' ? FLOAT_REGS : NO_REGS)
        !           433: 
        !           434: /* Define this macro to change register usage conditional on target flags.  */
        !           435: /* #define CONDITIONAL_REGISTER_USAGE  */
        !           436: 
        !           437: /* The letters I, J, K, L, M, N, O, and P in a register constraint string
        !           438:    can be used to stand for particular ranges of immediate operands.
        !           439:    This macro defines what the ranges are.
        !           440:    C is the letter, and VALUE is a constant value.
        !           441:    Return 1 if VALUE is in the range specified by C.
        !           442: 
        !           443:    For Alpha:
        !           444:    `I' is used for the range of constants most insns can contain.
        !           445:    `J' is the constant zero.
        !           446:    `K' is used for the constant in an LDA insn.
        !           447:    `L' is used for the constant in a LDAH insn.
        !           448:    `M' is used for the constants that can be AND'ed with using a ZAP insn.
        !           449:    `N' is used for complemented 8-bit constants.
        !           450:    `O' is used for negated 8-bit constants.
        !           451:    `P' is used for the constants 1, 2 and 3.  */
        !           452: 
        !           453: #define CONST_OK_FOR_LETTER_P(VALUE, C)                                \
        !           454:   ((C) == 'I' ? (unsigned HOST_WIDE_INT) (VALUE) < 0x100       \
        !           455:    : (C) == 'J' ? (VALUE) == 0                                 \
        !           456:    : (C) == 'K' ? (unsigned HOST_WIDE_INT) ((VALUE) + 0x8000) < 0x10000        \
        !           457:    : (C) == 'L' ? (((VALUE) & 0xffff) == 0                     \
        !           458:                   && (((VALUE)) >> 31 == -1 || (VALUE) >> 31 == 0)) \
        !           459:    : (C) == 'M' ? zap_mask (VALUE)                             \
        !           460:    : (C) == 'N' ? (unsigned HOST_WIDE_INT) (~ (VALUE)) < 0x100 \
        !           461:    : (C) == 'O' ? (unsigned HOST_WIDE_INT) (- (VALUE)) < 0x100 \
        !           462:    : (C) == 'P' ? (VALUE) == 1 || (VALUE) == 2 || (VALUE) == 3 \
        !           463:    : 0)
        !           464: 
        !           465: /* Similar, but for floating or large integer constants, and defining letters
        !           466:    G and H.   Here VALUE is the CONST_DOUBLE rtx itself.
        !           467: 
        !           468:    For Alpha, `G' is the floating-point constant zero.  `H' is a CONST_DOUBLE
        !           469:    that is the operand of a ZAP insn.  */
        !           470: 
        !           471: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)                         \
        !           472:   ((C) == 'G' ? (GET_MODE_CLASS (GET_MODE (VALUE)) == MODE_FLOAT       \
        !           473:                 && (VALUE) == CONST0_RTX (GET_MODE (VALUE)))           \
        !           474:    : (C) == 'H' ? (GET_MODE (VALUE) == VOIDmode                                \
        !           475:                   && zap_mask (CONST_DOUBLE_LOW (VALUE))               \
        !           476:                   && zap_mask (CONST_DOUBLE_HIGH (VALUE)))             \
        !           477:    : 0)
        !           478: 
        !           479: /* Given an rtx X being reloaded into a reg required to be
        !           480:    in class CLASS, return the class of reg to actually use.
        !           481:    In general this is just CLASS; but on some machines
        !           482:    in some cases it is preferable to use a more restrictive class.
        !           483: 
        !           484:    On the Alpha, all constants except zero go into a floating-point
        !           485:    register via memory.  */
        !           486: 
        !           487: #define PREFERRED_RELOAD_CLASS(X, CLASS)               \
        !           488:   (CONSTANT_P (X) && (X) != const0_rtx && (X) != CONST0_RTX (GET_MODE (X)) \
        !           489:    ? ((CLASS) == FLOAT_REGS ? NO_REGS : GENERAL_REGS)                  \
        !           490:    : (CLASS))
        !           491: 
        !           492: /* Loading and storing HImode or QImode values to and from memory
        !           493:    usually requires a scratch register.  The exceptions are loading
        !           494:    QImode and HImode from an aligned address to a general register. */
        !           495: 
        !           496: #define SECONDARY_INPUT_RELOAD_CLASS(CLASS,MODE,IN)                    \
        !           497: (((GET_CODE (IN) == MEM                                                \
        !           498:    || (GET_CODE (IN) == REG && REGNO (IN) >= FIRST_PSEUDO_REGISTER)    \
        !           499:    || (GET_CODE (IN) == SUBREG                                         \
        !           500:        && (GET_CODE (SUBREG_REG (IN)) == MEM                           \
        !           501:           || (GET_CODE (SUBREG_REG (IN)) == REG                        \
        !           502:               && REGNO (SUBREG_REG (IN)) >= FIRST_PSEUDO_REGISTER))))  \
        !           503:   && (((CLASS) == FLOAT_REGS                                           \
        !           504:        && ((MODE) == SImode || (MODE) == HImode || (MODE) == QImode))  \
        !           505:       || (((MODE) == QImode || (MODE) == HImode)                       \
        !           506:          && unaligned_memory_operand (IN, MODE))))                     \
        !           507:  ? GENERAL_REGS : NO_REGS)
        !           508: 
        !           509: #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS,MODE,OUT)                  \
        !           510: (((GET_CODE (OUT) == MEM                                               \
        !           511:    || (GET_CODE (OUT) == REG && REGNO (OUT) >= FIRST_PSEUDO_REGISTER)  \
        !           512:    || (GET_CODE (OUT) == SUBREG                                                \
        !           513:        && (GET_CODE (SUBREG_REG (OUT)) == MEM                          \
        !           514:           || (GET_CODE (SUBREG_REG (OUT)) == REG                       \
        !           515:               && REGNO (SUBREG_REG (OUT)) >= FIRST_PSEUDO_REGISTER)))) \
        !           516:   && (((MODE) == HImode || (MODE) == QImode                            \
        !           517:        || ((MODE) == SImode && (CLASS) == FLOAT_REGS))))               \
        !           518:  ? GENERAL_REGS : NO_REGS)
        !           519: 
        !           520: /* If we are copying between general and FP registers, we need a memory
        !           521:    location.  */
        !           522: 
        !           523: #define SECONDARY_MEMORY_NEEDED(CLASS1,CLASS2,MODE) ((CLASS1) != (CLASS2))
        !           524: 
        !           525: /* Return the maximum number of consecutive registers
        !           526:    needed to represent mode MODE in a register of class CLASS.  */
        !           527: 
        !           528: #define CLASS_MAX_NREGS(CLASS, MODE)                           \
        !           529:  ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
        !           530: 
        !           531: /* Define the cost of moving between registers of various classes.  Moving
        !           532:    between FLOAT_REGS and anything else except float regs is expensive. 
        !           533:    In fact, we make it quite expensive because we really don't want to
        !           534:    do these moves unless it is clearly worth it.  Optimizations may
        !           535:    reduce the impact of not being able to allocate a pseudo to a
        !           536:    hard register.  */
        !           537: 
        !           538: #define REGISTER_MOVE_COST(CLASS1, CLASS2)     \
        !           539:   (((CLASS1) == FLOAT_REGS) == ((CLASS2) == FLOAT_REGS) ? 2 : 20)
        !           540: 
        !           541: /* A C expressions returning the cost of moving data of MODE from a register to
        !           542:    or from memory.
        !           543: 
        !           544:    On the Alpha, bump this up a bit.  */
        !           545: 
        !           546: #define MEMORY_MOVE_COST(MODE)  6
        !           547: 
        !           548: /* Provide the cost of a branch.  Exact meaning under development.  */
        !           549: #define BRANCH_COST 5
        !           550: 
        !           551: /* Adjust the cost of dependencies.  */
        !           552: 
        !           553: #define ADJUST_COST(INSN,LINK,DEP,COST) \
        !           554:   (COST) = alpha_adjust_cost (INSN, LINK, DEP, COST)
        !           555: 
        !           556: /* Stack layout; function entry, exit and calling.  */
        !           557: 
        !           558: /* Define this if pushing a word on the stack
        !           559:    makes the stack pointer a smaller address.  */
        !           560: #define STACK_GROWS_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: 
        !           573: #define STARTING_FRAME_OFFSET (- current_function_pretend_args_size)
        !           574: 
        !           575: /* If we generate an insn to push BYTES bytes,
        !           576:    this says how many the stack pointer really advances by.
        !           577:    On Alpha, don't define this because there are no push insns.  */
        !           578: /*  #define PUSH_ROUNDING(BYTES) */
        !           579: 
        !           580: /* Define this if the maximum size of all the outgoing args is to be
        !           581:    accumulated and pushed during the prologue.  The amount can be
        !           582:    found in the variable current_function_outgoing_args_size.  */
        !           583: #define ACCUMULATE_OUTGOING_ARGS
        !           584: 
        !           585: /* Offset of first parameter from the argument pointer register value.  */
        !           586: 
        !           587: #define FIRST_PARM_OFFSET(FNDECL) (- current_function_pretend_args_size)
        !           588: 
        !           589: /* Definitions for register eliminations.
        !           590: 
        !           591:    We have one register that can be eliminated on the Alpha.  The
        !           592:    frame pointer register can often be eliminated in favor of the stack
        !           593:    pointer register.
        !           594: 
        !           595:    In addition, we use the elimination mechanism to see if gp (r29) is needed.
        !           596:    Initially we assume that it isn't.  If it is, we spill it.  This is done
        !           597:    by making it an eliminable register.  It doesn't matter what we replace
        !           598:    it with, since it will never occur in the rtl at this point.  */
        !           599: 
        !           600: /* This is an array of structures.  Each structure initializes one pair
        !           601:    of eliminable registers.  The "from" register number is given first,
        !           602:    followed by "to".  Eliminations of the same "from" register are listed
        !           603:    in order of preference.  */
        !           604: 
        !           605: #define ELIMINABLE_REGS                                \
        !           606: {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM},        \
        !           607:  { 29, 0}}
        !           608: 
        !           609: /* Given FROM and TO register numbers, say whether this elimination is allowed.
        !           610:    Frame pointer elimination is automatically handled.
        !           611: 
        !           612:    We need gp (r29) if we have calls or load symbols
        !           613:    (tested in alpha_need_gp).
        !           614: 
        !           615:    All other eliminations are valid since the cases where FP can't be
        !           616:    eliminated are already handled.  */
        !           617: 
        !           618: #define CAN_ELIMINATE(FROM, TO) ((FROM) == 29 ? ! alpha_need_gp () : 1)
        !           619: 
        !           620: /* Define the offset between two registers, one to be eliminated, and the other
        !           621:    its replacement, at the start of a routine.  */
        !           622: #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                   \
        !           623: { if ((FROM) == FRAME_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM)  \
        !           624:     (OFFSET) = (get_frame_size () + current_function_outgoing_args_size \
        !           625:                + current_function_pretend_args_size                    \
        !           626:                + alpha_sa_size () + 15) & ~ 15;                        \
        !           627: }
        !           628: 
        !           629: /* Define this if stack space is still allocated for a parameter passed
        !           630:    in a register.  */
        !           631: /* #define REG_PARM_STACK_SPACE */
        !           632: 
        !           633: /* Value is the number of bytes of arguments automatically
        !           634:    popped when returning from a subroutine call.
        !           635:    FUNTYPE is the data type of the function (as a tree),
        !           636:    or for a library call it is an identifier node for the subroutine name.
        !           637:    SIZE is the number of bytes of arguments passed on the stack.  */
        !           638: 
        !           639: #define RETURN_POPS_ARGS(FUNTYPE,SIZE) 0
        !           640: 
        !           641: /* Define how to find the value returned by a function.
        !           642:    VALTYPE is the data type of the value (as a tree).
        !           643:    If the precise function being called is known, FUNC is its FUNCTION_DECL;
        !           644:    otherwise, FUNC is 0.
        !           645: 
        !           646:    On Alpha the value is found in $0 for integer functions and
        !           647:    $f0 for floating-point functions.  */
        !           648: 
        !           649: #define FUNCTION_VALUE(VALTYPE, FUNC)  \
        !           650:   gen_rtx (REG,                                                \
        !           651:           ((TREE_CODE (VALTYPE) == INTEGER_TYPE        \
        !           652:             || TREE_CODE (VALTYPE) == ENUMERAL_TYPE    \
        !           653:             || TREE_CODE (VALTYPE) == BOOLEAN_TYPE     \
        !           654:             || TREE_CODE (VALTYPE) == CHAR_TYPE        \
        !           655:             || TREE_CODE (VALTYPE) == POINTER_TYPE     \
        !           656:             || TREE_CODE (VALTYPE) == OFFSET_TYPE)     \
        !           657:            && TYPE_PRECISION (VALTYPE) < BITS_PER_WORD) \
        !           658:           ? word_mode : TYPE_MODE (VALTYPE),           \
        !           659:           TARGET_FPREGS && TREE_CODE (VALTYPE) == REAL_TYPE ? 32 : 0)
        !           660: 
        !           661: /* Define how to find the value returned by a library function
        !           662:    assuming the value has mode MODE.  */
        !           663: 
        !           664: #define LIBCALL_VALUE(MODE)    \
        !           665:    gen_rtx (REG, MODE,         \
        !           666:            TARGET_FPREGS && GET_MODE_CLASS (MODE) == MODE_FLOAT ? 32 : 0)
        !           667: 
        !           668: /* 1 if N is a possible register number for a function value
        !           669:    as seen by the caller.  */
        !           670: 
        !           671: #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0 || (N) == 32)
        !           672: 
        !           673: /* 1 if N is a possible register number for function argument passing.
        !           674:    On Alpha, these are $16-$21 and $f16-$f21.  */
        !           675: 
        !           676: #define FUNCTION_ARG_REGNO_P(N) \
        !           677:   (((N) >= 16 && (N) <= 21) || ((N) >= 16 + 32 && (N) <= 21 + 32))
        !           678: 
        !           679: /* Define a data type for recording info about an argument list
        !           680:    during the scan of that argument list.  This data type should
        !           681:    hold all necessary information about the function itself
        !           682:    and about the args processed so far, enough to enable macros
        !           683:    such as FUNCTION_ARG to determine where the next arg should go.
        !           684: 
        !           685:    On Alpha, this is a single integer, which is a number of words
        !           686:    of arguments scanned so far.
        !           687:    Thus 6 or more means all following args should go on the stack.  */
        !           688: 
        !           689: #define CUMULATIVE_ARGS int
        !           690: 
        !           691: /* Initialize a variable CUM of type CUMULATIVE_ARGS
        !           692:    for a call to a function whose data type is FNTYPE.
        !           693:    For a library call, FNTYPE is 0.  */
        !           694: 
        !           695: #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME)  (CUM) = 0
        !           696: 
        !           697: /* Define intermediate macro to compute the size (in registers) of an argument
        !           698:    for the Alpha.  */
        !           699: 
        !           700: #define ALPHA_ARG_SIZE(MODE, TYPE, NAMED)                              \
        !           701: ((MODE) != BLKmode                                                     \
        !           702:  ? (GET_MODE_SIZE (MODE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD      \
        !           703:  : (int_size_in_bytes (TYPE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD)
        !           704: 
        !           705: /* Update the data in CUM to advance over an argument
        !           706:    of mode MODE and data type TYPE.
        !           707:    (TYPE is null for libcalls where that information may not be available.)  */
        !           708: 
        !           709: #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)                   \
        !           710:   if (MUST_PASS_IN_STACK (MODE, TYPE))                                 \
        !           711:     (CUM) = 6;                                                         \
        !           712:   else                                                                 \
        !           713:     (CUM) += ALPHA_ARG_SIZE (MODE, TYPE, NAMED)
        !           714: 
        !           715: /* Determine where to put an argument to a function.
        !           716:    Value is zero to push the argument on the stack,
        !           717:    or a hard register in which to store the argument.
        !           718: 
        !           719:    MODE is the argument's machine mode.
        !           720:    TYPE is the data type of the argument (as a tree).
        !           721:     This is null for libcalls where that information may
        !           722:     not be available.
        !           723:    CUM is a variable of type CUMULATIVE_ARGS which gives info about
        !           724:     the preceding args and about the function being called.
        !           725:    NAMED is nonzero if this argument is a named parameter
        !           726:     (otherwise it is an extra parameter matching an ellipsis).
        !           727: 
        !           728:    On Alpha the first 6 words of args are normally in registers
        !           729:    and the rest are pushed.  */
        !           730: 
        !           731: #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED)   \
        !           732: ((CUM) < 6 && ! MUST_PASS_IN_STACK (MODE, TYPE)        \
        !           733:  ? gen_rtx(REG, (MODE),                                \
        !           734:           (CUM) + 16 + (TARGET_FPREGS          \
        !           735:                         && GET_MODE_CLASS (MODE) == MODE_FLOAT) * 32) : 0)
        !           736: 
        !           737: /* Specify the padding direction of arguments.
        !           738: 
        !           739:    On the Alpha, we must pad upwards in order to be able to pass args in
        !           740:    registers.  */
        !           741: 
        !           742: #define FUNCTION_ARG_PADDING(MODE, TYPE)       upward
        !           743: 
        !           744: /* For an arg passed partly in registers and partly in memory,
        !           745:    this is the number of registers used.
        !           746:    For args passed entirely in registers or entirely in memory, zero.  */
        !           747: 
        !           748: #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED)     \
        !           749: ((CUM) < 6 && 6 < (CUM) + ALPHA_ARG_SIZE (MODE, TYPE, NAMED)   \
        !           750:  ? 6 - (CUM) : 0)
        !           751: 
        !           752: /* Generate necessary RTL for __builtin_saveregs().
        !           753:    ARGLIST is the argument list; see expr.c.  */
        !           754: extern struct rtx_def *alpha_builtin_saveregs ();
        !           755: #define EXPAND_BUILTIN_SAVEREGS(ARGLIST) alpha_builtin_saveregs (ARGLIST)
        !           756: 
        !           757: /* Define the information needed to generate branch and scc insns.  This is
        !           758:    stored from the compare operation.  Note that we can't use "rtx" here
        !           759:    since it hasn't been defined!  */
        !           760: 
        !           761: extern struct rtx_def *alpha_compare_op0, *alpha_compare_op1;
        !           762: extern int alpha_compare_fp_p;
        !           763: 
        !           764: /* This macro produces the initial definition of a function name.  On the
        !           765:    29k, we need to save the function name for the epilogue.  */
        !           766: 
        !           767: extern char *alpha_function_name;
        !           768: 
        !           769: #define ASM_DECLARE_FUNCTION_NAME(FILE,NAME,DECL)      \
        !           770:  { fprintf (FILE, "\t.ent %s 2\n", NAME);              \
        !           771:    ASM_OUTPUT_LABEL (FILE, NAME);                      \
        !           772:    alpha_function_name = NAME;                         \
        !           773: }
        !           774:    
        !           775: /* This macro generates the assembly code for function entry.
        !           776:    FILE is a stdio stream to output the code to.
        !           777:    SIZE is an int: how many units of temporary storage to allocate.
        !           778:    Refer to the array `regs_ever_live' to determine which registers
        !           779:    to save; `regs_ever_live[I]' is nonzero if register number I
        !           780:    is ever used in the function.  This macro is responsible for
        !           781:    knowing which registers should not be saved even if used.  */
        !           782: 
        !           783: #define FUNCTION_PROLOGUE(FILE, SIZE)  output_prolog (FILE, SIZE)
        !           784: 
        !           785: /* Output assembler code to FILE to increment profiler label # LABELNO
        !           786:    for profiling a function entry.  */
        !           787: 
        !           788: #define FUNCTION_PROFILER(FILE, LABELNO)
        !           789: 
        !           790: /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
        !           791:    the stack pointer does not matter.  The value is tested only in
        !           792:    functions that have frame pointers.
        !           793:    No definition is equivalent to always zero.  */
        !           794: 
        !           795: #define EXIT_IGNORE_STACK 1
        !           796: 
        !           797: /* This macro generates the assembly code for function exit,
        !           798:    on machines that need it.  If FUNCTION_EPILOGUE is not defined
        !           799:    then individual return instructions are generated for each
        !           800:    return statement.  Args are same as for FUNCTION_PROLOGUE.
        !           801: 
        !           802:    The function epilogue should not depend on the current stack pointer!
        !           803:    It should use the frame pointer only.  This is mandatory because
        !           804:    of alloca; we also take advantage of it to omit stack adjustments
        !           805:    before returning.  */
        !           806: 
        !           807: #define FUNCTION_EPILOGUE(FILE, SIZE)  output_epilog (FILE, SIZE)
        !           808: 
        !           809: 
        !           810: /* Output assembler code for a block containing the constant parts
        !           811:    of a trampoline, leaving space for the variable parts.
        !           812: 
        !           813:    The trampoline should set the static chain pointer to value placed
        !           814:    into the trampoline and should branch to the specified routine.  
        !           815:    Note that $27 has been set to the address of the trampoline, so we can
        !           816:    use it for addressability of the two data items.  Trampolines are always
        !           817:    aligned to FUNCTION_BOUNDARY, which is 64 bits.  */
        !           818: 
        !           819: #define TRAMPOLINE_TEMPLATE(FILE)              \
        !           820: {                                              \
        !           821:   fprintf (FILE, "\tldq $1,24($27)\n");                \
        !           822:   fprintf (FILE, "\tldq $27,16($27)\n");       \
        !           823:   fprintf (FILE, "\tjmp $31,($27),0\n");       \
        !           824:   fprintf (FILE, "\tnop\n");                   \
        !           825:   fprintf (FILE, "\t.quad 0,0\n");             \
        !           826: }
        !           827: 
        !           828: /* Section in which to place the trampoline.  On Alpha, instructions
        !           829:    may only be placed in a text segment.  */
        !           830: 
        !           831: #define TRAMPOLINE_SECTION text_section
        !           832: 
        !           833: /* Length in units of the trampoline for entering a nested function.  */
        !           834: 
        !           835: #define TRAMPOLINE_SIZE    32
        !           836: 
        !           837: /* Emit RTL insns to initialize the variable parts of a trampoline.
        !           838:    FNADDR is an RTX for the address of the function's pure code.
        !           839:    CXT is an RTX for the static chain value for the function.  We assume
        !           840:    here that a function will be called many more times than its address
        !           841:    is taken (e.g., it might be passed to qsort), so we take the trouble 
        !           842:    to initialize the "hint" field in the JMP insn.  Note that the hint
        !           843:    field is PC (new) + 4 * bits 13:0.  */
        !           844: 
        !           845: #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)                      \
        !           846: {                                                                      \
        !           847:   rtx _temp, _temp1, _addr;                                            \
        !           848:                                                                        \
        !           849:   _addr = memory_address (Pmode, plus_constant ((TRAMP), 16));         \
        !           850:   emit_move_insn (gen_rtx (MEM, Pmode, _addr), (FNADDR));              \
        !           851:   _addr = memory_address (Pmode, plus_constant ((TRAMP), 24));         \
        !           852:   emit_move_insn (gen_rtx (MEM, Pmode, _addr), (CXT));                 \
        !           853:                                                                        \
        !           854:   _temp = force_operand (plus_constant ((TRAMP), 12), NULL_RTX);       \
        !           855:   _temp = expand_binop (DImode, sub_optab, (FNADDR), _temp, _temp, 1,  \
        !           856:                        OPTAB_WIDEN);                                   \
        !           857:   _temp = expand_shift (RSHIFT_EXPR, Pmode, _temp,                     \
        !           858:                        build_int_2 (2, 0), NULL_RTX, 1);               \
        !           859:   _temp = expand_and (gen_lowpart (SImode, _temp),                     \
        !           860:                      GEN_INT (0x3fff), 0);                             \
        !           861:                                                                        \
        !           862:   _addr = memory_address (SImode, plus_constant ((TRAMP), 8));         \
        !           863:   _temp1 = force_reg (SImode, gen_rtx (MEM, SImode, _addr));           \
        !           864:   _temp1 = expand_and (_temp1, GEN_INT (0xffffc000), NULL_RTX);                \
        !           865:   _temp1 = expand_binop (SImode, ior_optab, _temp1, _temp, _temp1, 1,  \
        !           866:                         OPTAB_WIDEN);                                  \
        !           867:                                                                        \
        !           868:   emit_move_insn (gen_rtx (MEM, SImode, _addr), _temp1);               \
        !           869:                                                                        \
        !           870:   emit_library_call (gen_rtx (SYMBOL_REF, Pmode,                       \
        !           871:                              "__enable_execute_stack"),                \
        !           872:                     0, VOIDmode, 1,_addr, Pmode);                      \
        !           873:                                                                        \
        !           874:   emit_insn (gen_rtx (UNSPEC_VOLATILE, VOIDmode,                       \
        !           875:                      gen_rtvec (1, const0_rtx), 0));                   \
        !           876: }
        !           877: 
        !           878: /* Attempt to turn on access permissions for the stack.  */
        !           879: 
        !           880: #define TRANSFER_FROM_TRAMPOLINE                                       \
        !           881:                                                                        \
        !           882: void                                                                   \
        !           883: __enable_execute_stack (addr)                                          \
        !           884:      void *addr;                                                       \
        !           885: {                                                                      \
        !           886:   long size = getpagesize ();                                          \
        !           887:   long mask = ~(size-1);                                               \
        !           888:   char *page = (char *) (((long) addr) & mask);                                \
        !           889:   char *end  = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \
        !           890:                                                                        \
        !           891:   /* 7 is PROT_READ | PROT_WRITE | PROT_EXEC */                                \
        !           892:   if (mprotect (page, end - page, 7) < 0)                              \
        !           893:     perror ("mprotect of trampoline code");                            \
        !           894: }
        !           895: 
        !           896: /* Addressing modes, and classification of registers for them.  */
        !           897: 
        !           898: /* #define HAVE_POST_INCREMENT */
        !           899: /* #define HAVE_POST_DECREMENT */
        !           900: 
        !           901: /* #define HAVE_PRE_DECREMENT */
        !           902: /* #define HAVE_PRE_INCREMENT */
        !           903: 
        !           904: /* Macros to check register numbers against specific register classes.  */
        !           905: 
        !           906: /* These assume that REGNO is a hard or pseudo reg number.
        !           907:    They give nonzero only if REGNO is a hard reg of the suitable class
        !           908:    or a pseudo reg currently allocated to a suitable hard reg.
        !           909:    Since they use reg_renumber, they are safe only once reg_renumber
        !           910:    has been allocated, which happens in local-alloc.c.  */
        !           911: 
        !           912: #define REGNO_OK_FOR_INDEX_P(REGNO) 0
        !           913: #define REGNO_OK_FOR_BASE_P(REGNO) \
        !           914: (((REGNO) < 32 || (unsigned) reg_renumber[REGNO] < 32))
        !           915: 
        !           916: /* Maximum number of registers that can appear in a valid memory address.  */
        !           917: #define MAX_REGS_PER_ADDRESS 1
        !           918: 
        !           919: /* Recognize any constant value that is a valid address.  For the Alpha,
        !           920:    there are only constants none since we want to use LDA to load any
        !           921:    symbolic addresses into registers.  */
        !           922: 
        !           923: #define CONSTANT_ADDRESS_P(X)   \
        !           924:   (GET_CODE (X) == CONST_INT   \
        !           925:    && (unsigned HOST_WIDE_INT) (INTVAL (X) + 0x8000) < 0x10000)
        !           926: 
        !           927: /* Include all constant integers and constant doubles, but not
        !           928:    floating-point, except for floating-point zero.  */
        !           929: 
        !           930: #define LEGITIMATE_CONSTANT_P(X)               \
        !           931:   (GET_MODE_CLASS (GET_MODE (X)) != MODE_FLOAT \
        !           932:    || (X) == CONST0_RTX (GET_MODE (X)))
        !           933: 
        !           934: /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
        !           935:    and check its validity for a certain class.
        !           936:    We have two alternate definitions for each of them.
        !           937:    The usual definition accepts all pseudo regs; the other rejects
        !           938:    them unless they have been allocated suitable hard regs.
        !           939:    The symbol REG_OK_STRICT causes the latter definition to be used.
        !           940: 
        !           941:    Most source files want to accept pseudo regs in the hope that
        !           942:    they will get allocated to the class that the insn wants them to be in.
        !           943:    Source files for reload pass need to be strict.
        !           944:    After reload, it makes no difference, since pseudo regs have
        !           945:    been eliminated by then.  */
        !           946: 
        !           947: #ifndef REG_OK_STRICT
        !           948: 
        !           949: /* Nonzero if X is a hard reg that can be used as an index
        !           950:    or if it is a pseudo reg.  */
        !           951: #define REG_OK_FOR_INDEX_P(X) 0
        !           952: /* Nonzero if X is a hard reg that can be used as a base reg
        !           953:    or if it is a pseudo reg.  */
        !           954: #define REG_OK_FOR_BASE_P(X)  \
        !           955:   (REGNO (X) < 32 || REGNO (X) >= FIRST_PSEUDO_REGISTER)
        !           956: 
        !           957: #else
        !           958: 
        !           959: /* Nonzero if X is a hard reg that can be used as an index.  */
        !           960: #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
        !           961: /* Nonzero if X is a hard reg that can be used as a base reg.  */
        !           962: #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
        !           963: 
        !           964: #endif
        !           965: 
        !           966: /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
        !           967:    that is a valid memory address for an instruction.
        !           968:    The MODE argument is the machine mode for the MEM expression
        !           969:    that wants to use this address. 
        !           970: 
        !           971:    For Alpha, we have either a constant address or the sum of a register
        !           972:    and a constant address, or just a register.  For DImode, any of those
        !           973:    forms can be surrounded with an AND that clear the low-order three bits;
        !           974:    this is an "unaligned" access.
        !           975: 
        !           976:    We also allow a SYMBOL_REF that is the name of the current function as
        !           977:    valid address.  This is for CALL_INSNs.  It cannot be used in any other
        !           978:    context.
        !           979: 
        !           980:    First define the basic valid address.  */
        !           981: 
        !           982: #define GO_IF_LEGITIMATE_SIMPLE_ADDRESS(MODE, X, ADDR) \
        !           983: { if (REG_P (X) && REG_OK_FOR_BASE_P (X))      \
        !           984:     goto ADDR;                                 \
        !           985:   if (CONSTANT_ADDRESS_P (X))                  \
        !           986:     goto ADDR;                                 \
        !           987:   if (GET_CODE (X) == PLUS                     \
        !           988:       && REG_P (XEXP (X, 0))                   \
        !           989:       && REG_OK_FOR_BASE_P (XEXP (X, 0))       \
        !           990:       && CONSTANT_ADDRESS_P (XEXP (X, 1)))     \
        !           991:     goto ADDR;                                 \
        !           992: }
        !           993: 
        !           994: /* Now accept the simple address, or, for DImode only, an AND of a simple
        !           995:    address that turns off the low three bits.  */
        !           996: 
        !           997: extern char *current_function_name;
        !           998: 
        !           999: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
        !          1000: { GO_IF_LEGITIMATE_SIMPLE_ADDRESS (MODE, X, ADDR); \
        !          1001:   if ((MODE) == DImode                         \
        !          1002:       && GET_CODE (X) == AND                   \
        !          1003:       && GET_CODE (XEXP (X, 1)) == CONST_INT   \
        !          1004:       && INTVAL (XEXP (X, 1)) == -8)           \
        !          1005:     GO_IF_LEGITIMATE_SIMPLE_ADDRESS (MODE, XEXP (X, 0), ADDR); \
        !          1006:   if ((MODE) == Pmode && GET_CODE (X) == SYMBOL_REF    \
        !          1007:       && ! strcmp (XSTR (X, 0), current_function_name))        \
        !          1008:     goto ADDR;                                 \
        !          1009: }
        !          1010: 
        !          1011: /* Try machine-dependent ways of modifying an illegitimate address
        !          1012:    to be legitimate.  If we find one, return the new, valid address.
        !          1013:    This macro is used in only one place: `memory_address' in explow.c.
        !          1014: 
        !          1015:    OLDX is the address as it was before break_out_memory_refs was called.
        !          1016:    In some cases it is useful to look at this to decide what needs to be done.
        !          1017: 
        !          1018:    MODE and WIN are passed so that this macro can use
        !          1019:    GO_IF_LEGITIMATE_ADDRESS.
        !          1020: 
        !          1021:    It is always safe for this macro to do nothing.  It exists to recognize
        !          1022:    opportunities to optimize the output. 
        !          1023: 
        !          1024:    For the Alpha, there are three cases we handle:
        !          1025: 
        !          1026:    (1) If the address is (plus reg const_int) and the CONST_INT is not a
        !          1027:        valid offset, compute the high part of the constant and add it to the
        !          1028:        register.  Then our address is (plus temp low-part-const).
        !          1029:    (2) If the address is (const (plus FOO const_int)), find the low-order
        !          1030:        part of the CONST_INT.  Then load FOO plus any high-order part of the
        !          1031:        CONST_INT into a register.  Our address is (plus reg low-part-const).
        !          1032:        This is done to reduce the number of GOT entries.
        !          1033:    (3) If we have a (plus reg const), emit the load as in (2), then add
        !          1034:        the two registers, and finally generate (plus reg low-part-const) as
        !          1035:        our address.  */
        !          1036: 
        !          1037: #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN)                    \
        !          1038: { if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == REG    \
        !          1039:       && GET_CODE (XEXP (X, 1)) == CONST_INT                   \
        !          1040:       && ! CONSTANT_ADDRESS_P (XEXP (X, 1)))                   \
        !          1041:     {                                                          \
        !          1042:       HOST_WIDE_INT val = INTVAL (XEXP (X, 1));                        \
        !          1043:       HOST_WIDE_INT lowpart = (val & 0xffff) - 2 * (val & 0x8000); \
        !          1044:       HOST_WIDE_INT highpart = val - lowpart;                  \
        !          1045:       rtx high = GEN_INT (highpart);                           \
        !          1046:       rtx temp = expand_binop (Pmode, add_optab, XEXP (x, 0),  \
        !          1047:                               high, 0, OPTAB_LIB_WIDEN);       \
        !          1048:                                                                \
        !          1049:       (X) = plus_constant (temp, lowpart);                     \
        !          1050:       goto WIN;                                                        \
        !          1051:     }                                                          \
        !          1052:   else if (GET_CODE (X) == CONST                               \
        !          1053:           && GET_CODE (XEXP (X, 0)) == PLUS                    \
        !          1054:           && GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT)    \
        !          1055:     {                                                          \
        !          1056:       HOST_WIDE_INT val = INTVAL (XEXP (XEXP (X, 0), 1));      \
        !          1057:       HOST_WIDE_INT lowpart = (val & 0xffff) - 2 * (val & 0x8000); \
        !          1058:       HOST_WIDE_INT highpart = val - lowpart;                  \
        !          1059:       rtx high = XEXP (XEXP (X, 0), 0);                                \
        !          1060:                                                                \
        !          1061:       if (highpart)                                            \
        !          1062:        high = plus_constant (high, highpart);                  \
        !          1063:                                                                \
        !          1064:       (X) = plus_constant (force_reg (Pmode, high), lowpart);  \
        !          1065:       goto WIN;                                                        \
        !          1066:     }                                                          \
        !          1067:   else if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == REG \
        !          1068:           && GET_CODE (XEXP (X, 1)) == CONST                   \
        !          1069:           && GET_CODE (XEXP (XEXP (X, 1), 0)) == PLUS          \
        !          1070:           && GET_CODE (XEXP (XEXP (XEXP (X, 1), 0), 1)) == CONST_INT) \
        !          1071:     {                                                          \
        !          1072:       HOST_WIDE_INT val = INTVAL (XEXP (XEXP (XEXP (X, 1), 0), 1)); \
        !          1073:       HOST_WIDE_INT lowpart = (val & 0xffff) - 2 * (val & 0x8000); \
        !          1074:       HOST_WIDE_INT highpart = val - lowpart;                  \
        !          1075:       rtx high = XEXP (XEXP (XEXP (X, 1), 0), 0);              \
        !          1076:                                                                \
        !          1077:       if (highpart)                                            \
        !          1078:        high = plus_constant (high, highpart);                  \
        !          1079:                                                                \
        !          1080:       high = expand_binop (Pmode, add_optab, XEXP (X, 0),      \
        !          1081:                           force_reg (Pmode, high),             \
        !          1082:                           high, OPTAB_LIB_WIDEN);              \
        !          1083:       (X) = plus_constant (high, lowpart);                     \
        !          1084:       goto WIN;                                                        \
        !          1085:     }                                                          \
        !          1086: }
        !          1087: 
        !          1088: /* Go to LABEL if ADDR (a legitimate address expression)
        !          1089:    has an effect that depends on the machine mode it is used for.
        !          1090:    On the Alpha this is true only for the unaligned modes.   We can
        !          1091:    simplify this test since we know that the address must be valid.  */
        !          1092: 
        !          1093: #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)  \
        !          1094: { if (GET_CODE (ADDR) == AND) goto LABEL; }
        !          1095: 
        !          1096: /* Compute the cost of an address.  For the Alpha, all valid addresses are
        !          1097:    the same cost.  */
        !          1098: 
        !          1099: #define ADDRESS_COST(X)  0
        !          1100: 
        !          1101: /* Define this if some processing needs to be done immediately before
        !          1102:    emitting code for an insn.  */
        !          1103: 
        !          1104: /* #define FINAL_PRESCAN_INSN(INSN,OPERANDS,NOPERANDS) */
        !          1105: 
        !          1106: /* Specify the machine mode that this machine uses
        !          1107:    for the index in the tablejump instruction.  */
        !          1108: #define CASE_VECTOR_MODE SImode
        !          1109: 
        !          1110: /* Define this if the tablejump instruction expects the table
        !          1111:    to contain offsets from the address of the table.
        !          1112:    Do not define this if the table should contain absolute addresses.  */
        !          1113: /* #define CASE_VECTOR_PC_RELATIVE */
        !          1114: 
        !          1115: /* Specify the tree operation to be used to convert reals to integers.  */
        !          1116: #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
        !          1117: 
        !          1118: /* This is the kind of divide that is easiest to do in the general case.  */
        !          1119: #define EASY_DIV_EXPR TRUNC_DIV_EXPR
        !          1120: 
        !          1121: /* Define this as 1 if `char' should by default be signed; else as 0.  */
        !          1122: #define DEFAULT_SIGNED_CHAR 1
        !          1123: 
        !          1124: /* This flag, if defined, says the same insns that convert to a signed fixnum
        !          1125:    also convert validly to an unsigned one.
        !          1126: 
        !          1127:    We actually lie a bit here as overflow conditions are different.  But
        !          1128:    they aren't being checked anyway.  */
        !          1129: 
        !          1130: #define FIXUNS_TRUNC_LIKE_FIX_TRUNC
        !          1131: 
        !          1132: /* Max number of bytes we can move to or from memory
        !          1133:    in one reasonably fast instruction.  */
        !          1134: 
        !          1135: #define MOVE_MAX 8
        !          1136: 
        !          1137: /* Largest number of bytes of an object that can be placed in a register.
        !          1138:    On the Alpha we have plenty of registers, so use TImode.  */
        !          1139: #define MAX_FIXED_MODE_SIZE    GET_MODE_BITSIZE (TImode)
        !          1140: 
        !          1141: /* Nonzero if access to memory by bytes is no faster than for words.
        !          1142:    Also non-zero if doing byte operations (specifically shifts) in registers
        !          1143:    is undesirable. 
        !          1144: 
        !          1145:    On the Alpha, we want to not use the byte operation and instead use
        !          1146:    masking operations to access fields; these will save instructions.  */
        !          1147: 
        !          1148: #define SLOW_BYTE_ACCESS       1
        !          1149: 
        !          1150: /* Define if normal loads of shorter-than-word items from memory clears
        !          1151:    the rest of the bits in the register.  */
        !          1152: /* #define BYTE_LOADS_ZERO_EXTEND  */
        !          1153: 
        !          1154: /* Define if normal loads of shorter-than-word items from memory sign-extends
        !          1155:    the rest of the bits in the register.  */
        !          1156: #define BYTE_LOADS_SIGN_EXTEND
        !          1157: 
        !          1158: /* We aren't doing ANYTHING about debugging for now.  */
        !          1159: /* #define SDB_DEBUGGING_INFO */
        !          1160: 
        !          1161: /* Do not break .stabs pseudos into continuations.  */
        !          1162: #define DBX_CONTIN_LENGTH 0
        !          1163: 
        !          1164: /* Don't try to use the `x' type-cross-reference character in DBX data.
        !          1165:    Also has the consequence of putting each struct, union or enum
        !          1166:    into a separate .stabs, containing only cross-refs to the others.  */
        !          1167: #define DBX_NO_XREFS
        !          1168: 
        !          1169: /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
        !          1170:    is done just by pretending it is already truncated.  */
        !          1171: #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
        !          1172: 
        !          1173: /* We assume that the store-condition-codes instructions store 0 for false
        !          1174:    and some other value for true.  This is the value stored for true.  */
        !          1175: 
        !          1176: #define STORE_FLAG_VALUE 1
        !          1177: 
        !          1178: /* Define the value returned by a floating-point comparison instruction.  */
        !          1179: 
        !          1180: #define FLOAT_STORE_FLAG_VALUE 0.5
        !          1181: 
        !          1182: /* Specify the machine mode that pointers have.
        !          1183:    After generation of rtl, the compiler makes no further distinction
        !          1184:    between pointers and any other objects of this machine mode.  */
        !          1185: #define Pmode DImode
        !          1186: 
        !          1187: /* Mode of a function address in a call instruction (for indexing purposes). */
        !          1188: 
        !          1189: #define FUNCTION_MODE Pmode
        !          1190: 
        !          1191: /* Define this if addresses of constant functions
        !          1192:    shouldn't be put through pseudo regs where they can be cse'd.
        !          1193:    Desirable on machines where ordinary constants are expensive
        !          1194:    but a CALL with constant address is cheap.
        !          1195: 
        !          1196:    We define this on the Alpha so that gen_call and gen_call_value
        !          1197:    get to see the SYMBOL_REF (for the hint field of the jsr).  It will
        !          1198:    then copy it into a register, thus actually letting the address be
        !          1199:    cse'ed.  */
        !          1200: 
        !          1201: #define NO_FUNCTION_CSE
        !          1202: 
        !          1203: /* Define this if shift instructions ignore all but the low-order
        !          1204:    few bits. */
        !          1205: #define SHIFT_COUNT_TRUNCATED
        !          1206: 
        !          1207: /* Compute the cost of computing a constant rtl expression RTX
        !          1208:    whose rtx-code is CODE.  The body of this macro is a portion
        !          1209:    of a switch statement.  If the code is computed here,
        !          1210:    return it with a return statement.  Otherwise, break from the switch.
        !          1211: 
        !          1212:    We only care about the cost if it is valid in an insn, so all constants
        !          1213:    are cheap.  */
        !          1214: 
        !          1215: #define CONST_COSTS(RTX,CODE,OUTER_CODE) \
        !          1216:   case CONST_INT:                                              \
        !          1217:   case CONST_DOUBLE:                                           \
        !          1218:     return 0;                                                  \
        !          1219:   case CONST:                                                  \
        !          1220:   case SYMBOL_REF:                                             \
        !          1221:   case LABEL_REF:                                              \
        !          1222:     return 6;                                                  \
        !          1223:     
        !          1224: /* Provide the costs of a rtl expression.  This is in the body of a
        !          1225:    switch on CODE.  */
        !          1226:    
        !          1227: #define RTX_COSTS(X,CODE,OUTER_CODE)                   \
        !          1228:   case PLUS:                                           \
        !          1229:   case MINUS:                                          \
        !          1230:     if (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT)   \
        !          1231:       return COSTS_N_INSNS (6);                                \
        !          1232:     break;                                             \
        !          1233:   case MULT:                                           \
        !          1234:     if (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT)   \
        !          1235:       return COSTS_N_INSNS (6);                                \
        !          1236:     else                                               \
        !          1237:       return COSTS_N_INSNS (21);                       \
        !          1238:   case DIV:                                            \
        !          1239:   case UDIV:                                           \
        !          1240:   case MOD:                                            \
        !          1241:   case UMOD:                                           \
        !          1242:     if (GET_MODE (X) == SFmode)                                \
        !          1243:       return COSTS_N_INSNS (34);                       \
        !          1244:     else if (GET_MODE (X) == DFmode)                   \
        !          1245:       return COSTS_N_INSNS (63);                       \
        !          1246:     else                                               \
        !          1247:       return COSTS_N_INSNS (70);                       \
        !          1248:   case MEM:                                            \
        !          1249:     return COSTS_N_INSNS (3);
        !          1250: 
        !          1251: /* Control the assembler format that we output.  */
        !          1252: 
        !          1253: /* Output at beginning of assembler file.  */
        !          1254: 
        !          1255: #define ASM_FILE_START(FILE)                                   \
        !          1256: { extern char *version_string;                                 \
        !          1257:   char *p, *after_dir = main_input_filename;                   \
        !          1258:                                                                \
        !          1259:   fprintf (FILE, "\t.verstamp 9 0 ");                          \
        !          1260:   for (p = version_string; *p != ' ' && *p != 0; p++)          \
        !          1261:     fprintf (FILE, "%c", *p == '.' ? ' ' : *p);                        \
        !          1262:   fprintf (FILE, "\n\t.set noreorder\n");                      \
        !          1263:   fprintf (FILE, "\t.set noat\n");                             \
        !          1264:   for (p = main_input_filename; *p; p++)                       \
        !          1265:     if (*p == '/')                                             \
        !          1266:       after_dir = p + 1;                                       \
        !          1267:   fprintf (FILE, "\n\t.file 2 \"%s\"\n", after_dir);           \
        !          1268: }
        !          1269: 
        !          1270: /* Output to assembler file text saying following lines
        !          1271:    may contain character constants, extra white space, comments, etc.  */
        !          1272: 
        !          1273: #define ASM_APP_ON ""
        !          1274: 
        !          1275: /* Output to assembler file text saying following lines
        !          1276:    no longer contain unusual constructs.  */
        !          1277: 
        !          1278: #define ASM_APP_OFF ""
        !          1279: 
        !          1280: #define TEXT_SECTION_ASM_OP ".text"
        !          1281: 
        !          1282: /* Output before read-only data.  */
        !          1283: 
        !          1284: #define READONLY_DATA_SECTION_ASM_OP ".rdata"
        !          1285: 
        !          1286: /* Output before writable data.  */
        !          1287: 
        !          1288: #define DATA_SECTION_ASM_OP ".data"
        !          1289: 
        !          1290: /* Define an extra section for read-only data, a routine to enter it, and
        !          1291:    indicate that it is for read-only data.  */
        !          1292: 
        !          1293: #define EXTRA_SECTIONS readonly_data
        !          1294: 
        !          1295: #define EXTRA_SECTION_FUNCTIONS                                        \
        !          1296: void                                                           \
        !          1297: literal_section ()                                             \
        !          1298: {                                                              \
        !          1299:   if (in_section != readonly_data)                             \
        !          1300:     {                                                          \
        !          1301:       fprintf (asm_out_file, "%s\n", READONLY_DATA_SECTION_ASM_OP); \
        !          1302:       in_section = readonly_data;                              \
        !          1303:     }                                                          \
        !          1304: }                                                              \
        !          1305: 
        !          1306: #define READONLY_DATA_SECTION  literal_section
        !          1307: 
        !          1308: /* How to refer to registers in assembler output.
        !          1309:    This sequence is indexed by compiler's hard-register-number (see above).  */
        !          1310: 
        !          1311: #define REGISTER_NAMES                                         \
        !          1312: {"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8",         \
        !          1313:  "$9", "$10", "$11", "$12", "$13", "$14", "$15",               \
        !          1314:  "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",       \
        !          1315:  "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31",       \
        !          1316:  "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7", "$f8",        \
        !          1317:  "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15",                \
        !          1318:  "$f16", "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23",\
        !          1319:  "$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "$f31"}
        !          1320: 
        !          1321: /* How to renumber registers for dbx and gdb.  */
        !          1322: 
        !          1323: #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
        !          1324: 
        !          1325: /* This is how to output the definition of a user-level label named NAME,
        !          1326:    such as the label on a static function or variable NAME.  */
        !          1327: 
        !          1328: #define ASM_OUTPUT_LABEL(FILE,NAME)    \
        !          1329:   do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
        !          1330: 
        !          1331: /* This is how to output a command to make the user-level label named NAME
        !          1332:    defined for reference from other files.  */
        !          1333: 
        !          1334: #define ASM_GLOBALIZE_LABEL(FILE,NAME) \
        !          1335:   do { fputs ("\t.globl ", FILE); assemble_name (FILE, NAME); fputs ("\n", FILE);} while (0)
        !          1336: 
        !          1337: /* This is how to output a reference to a user-level label named NAME.
        !          1338:    `assemble_name' uses this.  */
        !          1339: 
        !          1340: #define ASM_OUTPUT_LABELREF(FILE,NAME) \
        !          1341:   fprintf (FILE, "%s", NAME)
        !          1342: 
        !          1343: /* This is how to output an internal numbered label where
        !          1344:    PREFIX is the class of label and NUM is the number within the class.  */
        !          1345: 
        !          1346: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)     \
        !          1347:   if ((PREFIX)[0] == 'L')                              \
        !          1348:     fprintf (FILE, "$%s%d:\n", & (PREFIX)[1], NUM + 32); \
        !          1349:   else                                                 \
        !          1350:     fprintf (FILE, "%s%d:\n", PREFIX, NUM);
        !          1351: 
        !          1352: /* This is how to output a label for a jump table.  Arguments are the same as
        !          1353:    for ASM_OUTPUT_INTERNAL_LABEL, except the insn for the jump table is
        !          1354:    passed. */
        !          1355: 
        !          1356: #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN)       \
        !          1357: { ASM_OUTPUT_ALIGN (FILE, 2); ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); }
        !          1358: 
        !          1359: /* This is how to store into the string LABEL
        !          1360:    the symbol_ref name of an internal numbered label where
        !          1361:    PREFIX is the class of label and NUM is the number within the class.
        !          1362:    This is suitable for output with `assemble_name'.  */
        !          1363: 
        !          1364: #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)  \
        !          1365:   if ((PREFIX)[0] == 'L')                              \
        !          1366:     sprintf (LABEL, "*$%s%d", & (PREFIX)[1], NUM + 32);        \
        !          1367:   else                                                 \
        !          1368:     sprintf (LABEL, "*%s%d", PREFIX, NUM)
        !          1369: 
        !          1370: /* This is how to output an assembler line defining a `double' constant.  */
        !          1371: 
        !          1372: #define ASM_OUTPUT_DOUBLE(FILE,VALUE)          \
        !          1373:   fprintf (FILE, "\t.t_floating %.20e\n", (VALUE))
        !          1374: 
        !          1375: /* This is how to output an assembler line defining a `float' constant.  */
        !          1376: 
        !          1377: #define ASM_OUTPUT_FLOAT(FILE,VALUE)           \
        !          1378:   fprintf (FILE, "\t.s_floating %.20e\n", (VALUE))
        !          1379: 
        !          1380: /* This is how to output an assembler line defining an `int' constant.  */
        !          1381: 
        !          1382: #define ASM_OUTPUT_INT(FILE,VALUE)             \
        !          1383: ( fprintf (FILE, "\t.long "),                  \
        !          1384:   output_addr_const (FILE, (VALUE)),           \
        !          1385:   fprintf (FILE, "\n"))
        !          1386: 
        !          1387: /* This is how to output an assembler line defining a `long' constant.  */
        !          1388: 
        !          1389: #define ASM_OUTPUT_DOUBLE_INT(FILE,VALUE)      \
        !          1390: ( fprintf (FILE, "\t.quad "),                  \
        !          1391:   output_addr_const (FILE, (VALUE)),           \
        !          1392:   fprintf (FILE, "\n"))
        !          1393: 
        !          1394: /* Likewise for `char' and `short' constants.  */
        !          1395: 
        !          1396: #define ASM_OUTPUT_SHORT(FILE,VALUE)  \
        !          1397: ( fprintf (FILE, "\t.word "),                  \
        !          1398:   output_addr_const (FILE, (VALUE)),           \
        !          1399:   fprintf (FILE, "\n"))
        !          1400: 
        !          1401: #define ASM_OUTPUT_CHAR(FILE,VALUE)            \
        !          1402: ( fprintf (FILE, "\t.byte "),                  \
        !          1403:   output_addr_const (FILE, (VALUE)),           \
        !          1404:   fprintf (FILE, "\n"))
        !          1405: 
        !          1406: /* We use the default ASCII-output routine, except that we don't write more
        !          1407:    than 50 characters since the assembler doesn't support very long lines.  */
        !          1408: 
        !          1409: #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
        !          1410:   do {                                                                       \
        !          1411:     FILE *_hide_asm_out_file = (MYFILE);                                     \
        !          1412:     unsigned char *_hide_p = (unsigned char *) (MYSTRING);                   \
        !          1413:     int _hide_thissize = (MYLENGTH);                                         \
        !          1414:     int _size_so_far = 0;                                                    \
        !          1415:     {                                                                        \
        !          1416:       FILE *asm_out_file = _hide_asm_out_file;                               \
        !          1417:       unsigned char *p = _hide_p;                                            \
        !          1418:       int thissize = _hide_thissize;                                         \
        !          1419:       int i;                                                                 \
        !          1420:       fprintf (asm_out_file, "\t.ascii \"");                                 \
        !          1421:                                                                              \
        !          1422:       for (i = 0; i < thissize; i++)                                         \
        !          1423:        {                                                                     \
        !          1424:          register int c = p[i];                                              \
        !          1425:                                                                              \
        !          1426:          if (_size_so_far ++ > 50 && i < thissize - 4)                       \
        !          1427:            _size_so_far = 0, fprintf (asm_out_file, "\"\n\t.ascii \"");      \
        !          1428:                                                                              \
        !          1429:          if (c == '\"' || c == '\\')                                         \
        !          1430:            putc ('\\', asm_out_file);                                        \
        !          1431:          if (c >= ' ' && c < 0177)                                           \
        !          1432:            putc (c, asm_out_file);                                           \
        !          1433:          else                                                                \
        !          1434:            {                                                                 \
        !          1435:              fprintf (asm_out_file, "\\%o", c);                              \
        !          1436:              /* After an octal-escape, if a digit follows,                   \
        !          1437:                 terminate one string constant and start another.             \
        !          1438:                 The Vax assembler fails to stop reading the escape           \
        !          1439:                 after three digits, so this is the only way we               \
        !          1440:                 can get it to parse the data properly.  */                   \
        !          1441:              if (i < thissize - 1                                            \
        !          1442:                  && p[i + 1] >= '0' && p[i + 1] <= '9')                      \
        !          1443:                fprintf (asm_out_file, "\"\n\t.ascii \"");                    \
        !          1444:          }                                                                   \
        !          1445:        }                                                                     \
        !          1446:       fprintf (asm_out_file, "\"\n");                                        \
        !          1447:     }                                                                        \
        !          1448:   }                                                                          \
        !          1449:   while (0)
        !          1450: /* This is how to output an insn to push a register on the stack.
        !          1451:    It need not be very fast code.  */
        !          1452: 
        !          1453: #define ASM_OUTPUT_REG_PUSH(FILE,REGNO)                                        \
        !          1454:  fprintf (FILE, "\tsubq $30,8,$30\n\tst%s $%s%d,0($30)\n",             \
        !          1455:          (REGNO) > 32 ? "t" : "q", (REGNO) > 32 ? "f" : "",            \
        !          1456:          (REGNO) & 31);
        !          1457: 
        !          1458: /* This is how to output an insn to pop a register from the stack.
        !          1459:    It need not be very fast code.  */
        !          1460: 
        !          1461: #define ASM_OUTPUT_REG_POP(FILE,REGNO)                                 \
        !          1462:   fprintf (FILE, "\tld%s $%s%d,0($30)\n\taddq $30,8,$30\n",            \
        !          1463:          (REGNO) > 32 ? "t" : "q", (REGNO) > 32 ? "f" : "",            \
        !          1464:          (REGNO) & 31);
        !          1465: 
        !          1466: /* This is how to output an assembler line for a numeric constant byte.  */
        !          1467: 
        !          1468: #define ASM_OUTPUT_BYTE(FILE,VALUE)  \
        !          1469:   fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
        !          1470: 
        !          1471: /* This is how to output an element of a case-vector that is absolute.  */
        !          1472: 
        !          1473: #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
        !          1474:   fprintf (FILE, "\t.gprel32 $%d\n", (VALUE) + 32)
        !          1475: 
        !          1476: /* This is how to output an element of a case-vector that is relative.
        !          1477:    (Alpha does not use such vectors, but we must define this macro anyway.)  */
        !          1478: 
        !          1479: #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL)  abort ()
        !          1480: 
        !          1481: /* This is how to output an assembler line
        !          1482:    that says to advance the location counter
        !          1483:    to a multiple of 2**LOG bytes.  */
        !          1484: 
        !          1485: #define ASM_OUTPUT_ALIGN(FILE,LOG)     \
        !          1486:   if ((LOG) != 0)                      \
        !          1487:     fprintf (FILE, "\t.align %d\n", LOG);
        !          1488: 
        !          1489: /* This is how to advance the location counter by SIZE bytes.  */
        !          1490: 
        !          1491: #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
        !          1492:   fprintf (FILE, "\t.space %d\n", (SIZE))
        !          1493: 
        !          1494: /* This says how to output an assembler line
        !          1495:    to define a global common symbol.  */
        !          1496: 
        !          1497: #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
        !          1498: ( fputs ("\t.comm ", (FILE)),                  \
        !          1499:   assemble_name ((FILE), (NAME)),              \
        !          1500:   fprintf ((FILE), ",%d\n", (SIZE)))
        !          1501: 
        !          1502: /* This says how to output an assembler line
        !          1503:    to define a local common symbol.  */
        !          1504: 
        !          1505: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE,ROUNDED)     \
        !          1506: ( fputs ("\t.lcomm ", (FILE)),                         \
        !          1507:   assemble_name ((FILE), (NAME)),                      \
        !          1508:   fprintf ((FILE), ",%d\n", (SIZE)))
        !          1509: 
        !          1510: /* Store in OUTPUT a string (made with alloca) containing
        !          1511:    an assembler-name for a local static variable named NAME.
        !          1512:    LABELNO is an integer which is different for each call.  */
        !          1513: 
        !          1514: #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
        !          1515: ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10),   \
        !          1516:   sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
        !          1517: 
        !          1518: /* Define the parentheses used to group arithmetic operations
        !          1519:    in assembler code.  */
        !          1520: 
        !          1521: #define ASM_OPEN_PAREN "("
        !          1522: #define ASM_CLOSE_PAREN ")"
        !          1523: 
        !          1524: /* Define results of standard character escape sequences.  */
        !          1525: #define TARGET_BELL 007
        !          1526: #define TARGET_BS 010
        !          1527: #define TARGET_TAB 011
        !          1528: #define TARGET_NEWLINE 012
        !          1529: #define TARGET_VT 013
        !          1530: #define TARGET_FF 014
        !          1531: #define TARGET_CR 015
        !          1532: 
        !          1533: /* Print operand X (an rtx) in assembler syntax to file FILE.
        !          1534:    CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
        !          1535:    For `%' followed by punctuation, CODE is the punctuation and X is null.  */
        !          1536: 
        !          1537: #define PRINT_OPERAND(FILE, X, CODE)  print_operand (FILE, X, CODE)
        !          1538: 
        !          1539: /* Determine which codes are valid without a following integer.  These must
        !          1540:    not be alphabetic.  */
        !          1541: 
        !          1542: #define PRINT_OPERAND_PUNCT_VALID_P(CODE) 0
        !          1543: 
        !          1544: /* Print a memory address as an operand to reference that memory location.  */
        !          1545: 
        !          1546: #define PRINT_OPERAND_ADDRESS(FILE, ADDR)              \
        !          1547: { rtx addr = (ADDR);                                   \
        !          1548:   int basereg = 31;                                    \
        !          1549:   HOST_WIDE_INT offset = 0;                            \
        !          1550:                                                        \
        !          1551:   if (GET_CODE (addr) == AND)                          \
        !          1552:     addr = XEXP (addr, 0);                             \
        !          1553:                                                        \
        !          1554:   if (GET_CODE (addr) == REG)                          \
        !          1555:     basereg = REGNO (addr);                            \
        !          1556:   else if (GET_CODE (addr) == CONST_INT)               \
        !          1557:     offset = INTVAL (addr);                            \
        !          1558:   else if (GET_CODE (addr) == PLUS                     \
        !          1559:           && GET_CODE (XEXP (addr, 0)) == REG          \
        !          1560:           && GET_CODE (XEXP (addr, 1)) == CONST_INT)   \
        !          1561:     basereg = REGNO (XEXP (addr, 0)), offset = INTVAL (XEXP (addr, 1)); \
        !          1562:   else                                                 \
        !          1563:     abort ();                                          \
        !          1564:                                                        \
        !          1565:   fprintf (FILE, "%d($%d)", offset, basereg);          \
        !          1566: }
        !          1567: /* Define the codes that are matched by predicates in alpha.c.  */
        !          1568: 
        !          1569: #define PREDICATE_CODES \
        !          1570:   {"reg_or_0_operand", {SUBREG, REG, CONST_INT}},      \
        !          1571:   {"reg_or_8bit_operand", {SUBREG, REG, CONST_INT}},   \
        !          1572:   {"reg_or_cint_operand", {SUBREG, REG, CONST_INT}},   \
        !          1573:   {"add_operand", {SUBREG, REG, CONST_INT}},           \
        !          1574:   {"sext_add_operand", {SUBREG, REG, CONST_INT}},      \
        !          1575:   {"const48_operand", {CONST_INT}},                    \
        !          1576:   {"and_operand", {SUBREG, REG, CONST_INT}},           \
        !          1577:   {"mode_mask_operand", {CONST_INT}},                  \
        !          1578:   {"mul8_operand", {CONST_INT}},                       \
        !          1579:   {"mode_width_operand", {CONST_INT}},                 \
        !          1580:   {"reg_or_fp0_operand", {SUBREG, REG, CONST_DOUBLE}}, \
        !          1581:   {"alpha_comparison_operator", {EQ, LE, LT, LEU, LTU}}, \
        !          1582:   {"signed_comparison_operator", {EQ, NE, LE, LT, GE, GT}}, \
        !          1583:   {"fp0_operand", {CONST_DOUBLE}},                     \
        !          1584:   {"input_operand", {SUBREG, REG, MEM, CONST_INT, CONST_DOUBLE,        \
        !          1585:                     SYMBOL_REF, CONST, LABEL_REF}},    \
        !          1586:   {"aligned_memory_operand", {MEM}},                   \
        !          1587:   {"unaligned_memory_operand", {MEM}},                 \
        !          1588:   {"any_memory_operand", {MEM}},

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.