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Annotation of gcc/config/1750a/1750a.h, revision 1.1

1.1     ! root        1: /* Definitions of target machine for GNU compiler.
        !             2:    Copyright (C) 1994 Free Software Foundation, Inc.
        !             3:    Contributed by O.M.Kellogg, DASA ([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 1, 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: /* See tm-sun3.h, tm-sun2.h, tm-isi68.h for different CPP_PREDEFINES.  */
        !            25: #define CPP_PREDEFINES ""
        !            26: 
        !            27: /* Print subsidiary information on the compiler version in use.  */
        !            28: #ifdef IEEE
        !            29: #define TARGET_VERSION fprintf (stderr, " (1750A, IEEE syntax)");
        !            30: #else
        !            31: #define TARGET_VERSION fprintf (stderr, " (MIL-STD-1750A)");
        !            32: #endif
        !            33: 
        !            34: /* Run-time compilation parameters selecting different hardware subsets.  */
        !            35: 
        !            36: #define TARGET_SWITCHES  \
        !            37:   { {"vaxc-alignment", 2}, \
        !            38:     { "", TARGET_DEFAULT}}
        !            39: 
        !            40: /* Default target_flags if no switches specified.  */
        !            41: 
        !            42: #ifndef TARGET_DEFAULT
        !            43: #define TARGET_DEFAULT 1
        !            44: #endif
        !            45: 
        !            46: /*****************************************************************************/
        !            47: 
        !            48: /* SPECIAL ADDITION FOR MIL-STD-1750A     by O.M.Kellogg, 15-Apr-1993 */
        !            49: /* See file aux-output.c for the actual data instances. */
        !            50: struct datalabel_array {
        !            51:     char *name;
        !            52:     char value[14];
        !            53:     int size;
        !            54: };
        !            55: struct jumplabel_array {
        !            56:     int pc;
        !            57:     int num;
        !            58: };
        !            59: enum section { Init, Normal, Konst, Static };
        !            60: #define DATALBL_ARRSIZ 256
        !            61: #define JMPLBL_ARRSIZ  256
        !            62: #ifndef __datalbl
        !            63: extern struct datalabel_array datalbl[];
        !            64: extern struct jumplabel_array jmplbl[];
        !            65: extern int datalbl_ndx, jmplbl_ndx, label_pending, program_counter;
        !            66: extern enum section current_section;
        !            67: extern char *sectname[4];
        !            68: extern char *strdup(), *float_label();
        !            69: #endif
        !            70: /*--------------------------------------------------------------------*/
        !            71: 
        !            72: /* target machine storage layout */
        !            73: 
        !            74: /* Define this if most significant bit is lowest numbered
        !            75:    in instructions that operate on numbered bit-fields.
        !            76:    Though 1750 actually counts bits in big-endian fashion, the sign bit
        !            77:    is still the most significant bit, which is leftmost. Therefore leaving
        !            78:    this little-endian. Adjust short before assembler output when needed:
        !            79:    e.g. in QImode, a GCC bit n is a 1750 bit (15-n). */
        !            80: #define BITS_BIG_ENDIAN 0 
        !            81: 
        !            82: /* Define this if most significant byte of a word is the lowest numbered.  */
        !            83: /* For 1750 we can decide arbitrarily
        !            84:    since there are no machine instructions for them.  */
        !            85: #define BYTES_BIG_ENDIAN 0
        !            86: 
        !            87: /* Define this if most significant word of a multiword value is lowest
        !            88:    numbered.
        !            89:    True for 1750. */
        !            90: #define WORDS_BIG_ENDIAN 1
        !            91: 
        !            92: /* number of bits in an addressable storage unit */
        !            93: #define BITS_PER_UNIT        16
        !            94: 
        !            95: /* Width in bits of a "word", which is the contents of a machine register.
        !            96:    Note that this is not necessarily the width of data type `int';
        !            97:    if using 16-bit ints on a 68000, this would still be 32.
        !            98:    But on a machine with 16-bit registers, this would be 16.  */
        !            99: #define BITS_PER_WORD        16
        !           100: 
        !           101: /* Width of a word, in units (bytes).  */
        !           102: #define UNITS_PER_WORD       1
        !           103: 
        !           104: /* Width in bits of a pointer.
        !           105:    See also the macro `Pmode' defined below.  */
        !           106: #define POINTER_SIZE         16
        !           107: 
        !           108: #define PTRDIFF_TYPE        "int"
        !           109: 
        !           110: /* Type to use for `size_t'. If undefined, uses `long unsigned int'. */
        !           111: #define SIZE_TYPE           "int"
        !           112: 
        !           113: /* 1750a preliminary
        !           114:    #define TARGET_FLOAT_FORMAT UNKNOWN_FLOAT_FORMAT
        !           115: */
        !           116: 
        !           117: /* Allocation boundary (in *bits*) for storing pointers in memory.  */
        !           118: #define POINTER_BOUNDARY     16
        !           119: 
        !           120: /* Allocation boundary (in *bits*) for storing arguments in argument list.  */
        !           121: /* 1750: should have had to make this 32 when BITS_PER_WORD is 32. */
        !           122: #define PARM_BOUNDARY        16
        !           123: 
        !           124: /* Boundary (in *bits*) on which stack pointer should be aligned.  */
        !           125: #define STACK_BOUNDARY       16
        !           126: 
        !           127: /* Allocation boundary (in *bits*) for the code of a function.  */
        !           128: #define FUNCTION_BOUNDARY    16
        !           129: 
        !           130: /* Alignment of field after `int : 0' in a structure.  */
        !           131: #define EMPTY_FIELD_BOUNDARY 16
        !           132: 
        !           133: /* No data type wants to be aligned rounder than this.  */
        !           134: #define BIGGEST_ALIGNMENT    16
        !           135: 
        !           136: /* Define this to 1 if move instructions will actually fail to work
        !           137:    when given unaligned data. */
        !           138: #define STRICT_ALIGNMENT 0
        !           139: 
        !           140: /* Define number of bits in most basic integer type.
        !           141:    (If undefined, default is BITS_PER_WORD).
        !           142:    #define INT_TYPE_SIZE  16  */
        !           143: 
        !           144: /* Define number of bits in short integer type.
        !           145:    (If undefined, default is half of BITS_PER_WORD). */
        !           146: #define SHORT_TYPE_SIZE 16
        !           147: 
        !           148: /* Define number of bits in long integer type.
        !           149:    (If undefined, default is BITS_PER_WORD). */
        !           150: #define LONG_TYPE_SIZE  32
        !           151: 
        !           152: /* Define number of bits in long long integer type.
        !           153:    (If undefined, default is twice BITS_PER_WORD). */
        !           154: /* 1750 PRELIMINARY : no processor support for `long long', therefore
        !           155:         need to check out the long-long opencodings ! */
        !           156: #define LONG_LONG_TYPE_SIZE  64
        !           157: 
        !           158: /* Define number of bits in char type.
        !           159:    (If undefined, default is one fourth of BITS_PER_WORD). */
        !           160: #define CHAR_TYPE_SIZE  16
        !           161: 
        !           162: /* Define number of bits in float type.
        !           163:    (If undefined, default is BITS_PER_WORD). */
        !           164: #define FLOAT_TYPE_SIZE  32
        !           165: 
        !           166: /* Define number of bits in double type.
        !           167:    (If undefined, default is twice BITS_PER_WORD). */
        !           168: #define DOUBLE_TYPE_SIZE  48
        !           169: 
        !           170: /*****************************************************************************/
        !           171: 
        !           172: /* Standard register usage.  */
        !           173: 
        !           174: /* Number of actual hardware registers.
        !           175:    The hardware registers are assigned numbers for the compiler
        !           176:    from 0 to just below FIRST_PSEUDO_REGISTER.
        !           177:    All registers that the compiler knows about must be given numbers,
        !           178:    even those that are not normally considered general registers. */
        !           179: #define FIRST_PSEUDO_REGISTER 16
        !           180: 
        !           181: /* 1 for registers that have pervasive standard uses
        !           182:    and are not available for the register allocator.
        !           183:    R15 is the 1750A stack pointer. R14 is the frame pointer. */
        !           184: 
        !           185: #define FIXED_REGISTERS  \
        !           186:  { 0, 0, 0, 0, 0, 0, 0, 0, \
        !           187:    0, 0, 0, 0, 0, 0, 1, 1 }
        !           188: 
        !           189: /* 1 for registers not available across function calls.
        !           190:    These must include the FIXED_REGISTERS and also any
        !           191:    registers that can be used without being saved.
        !           192:    The latter must include the registers where values are returned
        !           193:    and the register where structure-value addresses are passed.
        !           194:    Aside from that, you can include as many other registers as you like.
        !           195:    1750: return value in R0 foll. (depending on size of retval).
        !           196:    Should be possible to refine this (how many regs are actually used) */
        !           197: 
        !           198: #define CALL_USED_REGISTERS \
        !           199:  { 1, 1, 1, 1, 1, 1, 1, 1, \
        !           200:    1, 1, 1, 1, 1, 1, 1, 1 }
        !           201: 
        !           202: /* Return number of consecutive hard regs needed starting at reg REGNO
        !           203:    to hold something of mode MODE.
        !           204:    This is ordinarily the length in words of a value of mode MODE
        !           205:    but can be less for certain modes in special long registers.
        !           206:    All 1750 registers are one word long. */
        !           207: #define HARD_REGNO_NREGS(REGNO, MODE)   \
        !           208:    ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
        !           209: 
        !           210: /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE. */
        !           211: #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
        !           212: 
        !           213: /* Value is 1 if it is a good idea to tie two pseudo registers
        !           214:    when one has mode MODE1 and one has mode MODE2.
        !           215:    If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
        !           216:    for any hard reg, then this must be 0 for correct output. */
        !           217: #define MODES_TIEABLE_P(MODE1, MODE2)  1
        !           218: 
        !           219: /* Specify the registers used for certain standard purposes.
        !           220:    The values of these macros are register numbers.  */
        !           221: 
        !           222: /* 1750A pc isn't overloaded on a register.  */
        !           223: /* #define PC_REGNUM  */
        !           224: 
        !           225: /* Register to use for pushing function arguments.  */
        !           226: #define STACK_POINTER_REGNUM 15
        !           227: 
        !           228: /* Base register for access to local variables of the function.  */
        !           229: #define FRAME_POINTER_REGNUM 14
        !           230: 
        !           231: /* Value should be nonzero if functions must have frame pointers.
        !           232:    Zero means the frame pointer need not be set up (and parms
        !           233:    may be accessed via the stack pointer) in functions that seem suitable.
        !           234:    This is computed in `reload', in reload1.c. */
        !           235: #define FRAME_POINTER_REQUIRED 1
        !           236: 
        !           237: /* Base register for access to arguments of the function.  */
        !           238: #define ARG_POINTER_REGNUM 14
        !           239: 
        !           240: /* Define this if successive args to a function occupy decreasing addresses
        !           241:    on the stack. 
        !           242:    #define ARGS_GROW_DOWNWARD
        !           243: */
        !           244: 
        !           245: /* Register in which static-chain is passed to a function. */
        !           246: #define STATIC_CHAIN_REGNUM 13
        !           247: 
        !           248: /* Register in which address to store a structure value
        !           249:    is passed to a function. */
        !           250: #define STRUCT_VALUE_REGNUM 12
        !           251: 
        !           252: /* Define this to be 1 if all structure return values must be in memory. */
        !           253: #define DEFAUT_PCC_STRUCT_RETURN 0
        !           254: 
        !           255: /*****************************************************************************/
        !           256: 
        !           257: /* Define the classes of registers for register constraints in the
        !           258:    machine description.  Also define ranges of constants.
        !           259: 
        !           260:    One of the classes must always be named ALL_REGS and include all hard regs.
        !           261:    If there is more than one class, another class must be named NO_REGS
        !           262:    and contain no registers.
        !           263: 
        !           264:    The name GENERAL_REGS must be the name of a class (or an alias for
        !           265:    another name such as ALL_REGS).  This is the class of registers
        !           266:    that is allowed by "g" or "r" in a register constraint.
        !           267:    Also, registers outside this class are allocated only when
        !           268:    instructions express preferences for them.
        !           269: 
        !           270:    The classes must be numbered in nondecreasing order; that is,
        !           271:    a larger-numbered class must never be contained completely
        !           272:    in a smaller-numbered class.
        !           273: 
        !           274:    For any two classes, it is very desirable that there be another
        !           275:    class that represents their union.  */
        !           276: 
        !           277: /* 1750 note: The names (BASE_REGS/INDEX_REGS) are used in their *gcc sense*
        !           278:    (i.e. *opposite* to the MIL-STD-1750A defined meanings). This means that
        !           279:    R1..R15 are called "base" regs and R12..R15 are "index" regs.
        !           280:    Index reg mode (in the gcc sense) is not yet implemented (these are the
        !           281:    1750 "Base with Index Reg" instructions, LBX etc. See 1750.md)
        !           282: 
        !           283:    Here's an example to drive this point home: in "LBX B12,R5"
        !           284:    B12 shall be called the "index" reg and R5 shall be the "base" reg.
        !           285:    This naming inversion is due to the GCC defined capabilities of
        !           286:    "Base" vs. "Index" regs. */
        !           287: 
        !           288: enum reg_class { NO_REGS, INDEX_REGS, BASE_REGS, ALL_REGS, LIM_REG_CLASSES };
        !           289: 
        !           290: #define N_REG_CLASSES (int) LIM_REG_CLASSES
        !           291: 
        !           292: /* Since GENERAL_REGS is the same class as ALL_REGS,
        !           293:    don't give it a different class number; just make it an alias. */
        !           294: #define GENERAL_REGS ALL_REGS
        !           295: 
        !           296: /* Give names of register classes as strings for dump file.   */
        !           297: 
        !           298: #define REG_CLASS_NAMES \
        !           299:  { "NO_REGS", "INDEX_REGS", "BASE_REGS", "ALL_REGS" }
        !           300: 
        !           301: /* Define which registers fit in which classes.
        !           302:    This is an initializer for a vector of HARD_REG_SET
        !           303:    of length N_REG_CLASSES.
        !           304:    1750 "index" (remember, in the *GCC* sense!) regs are R12 through R15. 
        !           305:    The only 1750 register not usable as BASE_REG is R0. */
        !           306: 
        !           307: #define REG_CLASS_CONTENTS  {0, 0xf000, 0xfffe, 0xffff}
        !           308: 
        !           309: /* The same information, inverted:
        !           310:    Return the class number of the smallest class containing
        !           311:    reg number REGNO.  This could be a conditional expression
        !           312:    or could index an array.  */
        !           313: #define REGNO_REG_CLASS(REGNO) \
        !           314:  ((REGNO) >= 12 ? INDEX_REGS : (REGNO) >  0 ? BASE_REGS : ALL_REGS)
        !           315: 
        !           316: /* The class value for index registers, and the one for base regs. */
        !           317: 
        !           318: #define BASE_REG_CLASS  BASE_REGS
        !           319: #define INDEX_REG_CLASS INDEX_REGS
        !           320: 
        !           321: /* Get reg_class from a letter such as appears in the machine description.
        !           322:    For the 1750, we have 'b' for gcc Base regs and 'x' for gcc Index regs. */
        !           323: 
        !           324: #define REG_CLASS_FROM_LETTER(C) ((C) == 'b' ? BASE_REGS : \
        !           325:                                  (C) == 'x' ? INDEX_REGS : NO_REGS)
        !           326: 
        !           327: /* The letters I,J,K,.. to P in a register constraint string
        !           328:    can be used to stand for particular ranges of immediate operands.
        !           329:    This macro defines what the ranges are.
        !           330:    C is the letter, and VALUE is a constant value.
        !           331:    Return 1 if VALUE is in the range specified by C.
        !           332: 
        !           333:    For the 1750A, 
        !           334:    `I' is used for ISP mode instructions,
        !           335:    `J' is used for ISN mode instructions,
        !           336:    `K' is used for the STC instruction's constant range,
        !           337:    `L' is used for unsigned 8-bit address displacements in instructions
        !           338:        of addressing mode "Base Relative",
        !           339:    `M' is for IM mode instructions et al.,
        !           340:    `O' is a synonym for (const_int 0). */
        !           341: 
        !           342: #define CONST_OK_FOR_LETTER_P(VALUE, C)                                \
        !           343:   ((C) == 'I' ? (VALUE) > 0 && (VALUE) <=  16 :                        \
        !           344:    (C) == 'J' ? (VALUE) < 0 && (VALUE) >= -16 :                        \
        !           345:    (C) == 'K' ? (VALUE) >= 0 && (VALUE) <= 15 :                        \
        !           346:    (C) == 'L' ? (VALUE) >= 0 && (VALUE) <= 0xFF :              \
        !           347:    (C) == 'M' ? (VALUE) >= -0x8000 && (VALUE) <= 0x7FFF :      \
        !           348:    (C) == 'O' ? (VALUE) == 0 :                         0)
        !           349: 
        !           350: /* Similar, but for floating constants, and defining letter 'G'.
        !           351:    Here VALUE is the CONST_DOUBLE rtx itself.  */
        !           352: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)  0
        !           353: 
        !           354: /* Given an rtx X being reloaded into a reg required to be
        !           355:    in class CLASS, return the class of reg to actually use.
        !           356:    In general this is just CLASS; but on some machines
        !           357:    in some cases it is preferable to use a more restrictive class.
        !           358:    For the 1750A, we force an immediate CONST_DOUBLE value to memory. */
        !           359: #define PREFERRED_RELOAD_CLASS(X,CLASS)  \
        !           360:                (GET_CODE(X) == CONST_DOUBLE ? NO_REGS : CLASS)
        !           361: 
        !           362: /* Return the maximum number of consecutive registers
        !           363:    needed to represent mode MODE in a register of class CLASS.
        !           364:    On the 1750A, this is the size of MODE in words,
        !           365:    since class doesn't make any difference. */
        !           366: #define CLASS_MAX_NREGS(CLASS,MODE)  GET_MODE_SIZE(MODE)
        !           367: 
        !           368: /*****************************************************************************/
        !           369: 
        !           370: /* Stack layout; function entry, exit and calling.  */
        !           371: 
        !           372: /* Define this if pushing a word on the stack
        !           373:    makes the stack pointer a smaller address.  */
        !           374: #define STACK_GROWS_DOWNWARD 1
        !           375: 
        !           376: /* Define this if the nominal address of the stack frame
        !           377:    is at the high-address end of the local variables;
        !           378:    goes at a more negative offset in the frame. 
        !           379:    #define FRAME_GROWS_DOWNWARD
        !           380: */
        !           381: 
        !           382: /* Offset within stack frame to start allocating local variables at.
        !           383:    If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
        !           384:    first local allocated.  Otherwise, it is the offset to the BEGINNING
        !           385:    of the first local allocated.
        !           386: */
        !           387: #define STARTING_FRAME_OFFSET 1
        !           388: 
        !           389: /* This is the default anyway:
        !           390:    #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) FRAMEADDR
        !           391: */
        !           392: 
        !           393: /* If we generate an insn to push BYTES bytes,
        !           394:    this says how many the stack pointer really advances by.
        !           395:    1750 note: what GCC calls a "byte" is really a 16-bit word,
        !           396:    because BITS_PER_UNIT is 16. */
        !           397: 
        !           398: #define PUSH_ROUNDING(BYTES) (BYTES)
        !           399: 
        !           400: /* Define this macro if functions should assume that stack space has
        !           401:    been allocated for arguments even when their values are passed in
        !           402:    registers.
        !           403:    Size, in bytes, of the area reserved for arguments passed in
        !           404:    registers for the function represented by FNDECL. 
        !           405:    #define REG_PARM_STACK_SPACE(FNDECL) 14 */
        !           406: 
        !           407: /* Define this if it is the responsibility of the caller to allocate
        !           408:    the area reserved for arguments passed in registers. 
        !           409:    #define OUTGOING_REG_PARM_STACK_SPACE */
        !           410: 
        !           411: /* Offset of first parameter from the argument pointer register value.
        !           412:    1750 note:
        !           413:    Parameters appear in reversed order on the frame (so when they are
        !           414:    popped, they come off in the normal left-to-right order.)
        !           415:    Computed as follows:
        !           416:    one word for the caller's (PC+1) (i.e. the return address)
        !           417:    plus total size of called function's "auto" variables
        !           418:    plus one word for the caller's frame pointer (i.e. the old FP) */
        !           419: 
        !           420: #define FIRST_PARM_OFFSET(FNDECL) \
        !           421:    (1 + get_frame_size() + 1)
        !           422: 
        !           423: /* Value is 1 if returning from a function call automatically
        !           424:    pops the arguments described by the number-of-args field in the call.
        !           425:    FUNTYPE is the data type of the function (as a tree),
        !           426:    or for a library call it is an identifier node for the subroutine name.
        !           427: */
        !           428: 
        !           429: #define RETURN_POPS_ARGS(FUNTYPE,SIZE) 0
        !           430: 
        !           431: /* Define how to find the value returned by a function.
        !           432:    VALTYPE is the data type of the value (as a tree).
        !           433:    If the precise function being called is known, FUNC is its FUNCTION_DECL;
        !           434:    otherwise, FUNC is 0. */
        !           435: 
        !           436: #define FUNCTION_VALUE(VALTYPE, FUNC)  \
        !           437:   gen_rtx(REG,TYPE_MODE(VALTYPE),0)
        !           438: 
        !           439: /* Define how to find the value returned by a library function
        !           440:    assuming the value has mode MODE. */
        !           441: /* 1750 note: no libcalls yet */
        !           442: 
        !           443: #define LIBCALL_VALUE(MODE)  printf("LIBCALL_VALUE called!\n"), \
        !           444:   gen_rtx(REG,MODE,0)
        !           445: 
        !           446: /* 1 if N is a possible register number for a function value. */
        !           447: 
        !           448: #define FUNCTION_VALUE_REGNO_P(N)  ((N) == 0)
        !           449: 
        !           450: /* 1 if the tree TYPE should be returned in memory instead of in regs. 
        !           451:    #define RETURN_IN_MEMORY(TYPE) \
        !           452:    (int_size_in_bytes(TYPE) > 12)
        !           453: */
        !           454: 
        !           455: /* Define this if PCC uses the nonreentrant convention for returning
        !           456:    structure and union values. 
        !           457:    #define PCC_STATIC_STRUCT_RETURN  */
        !           458: 
        !           459: /* 1 if N is a possible register number for function argument passing. */
        !           460: 
        !           461: #define FUNCTION_ARG_REGNO_P(N)  ((N) < 12)
        !           462: 
        !           463: /*****************************************************************************/
        !           464: 
        !           465: /* Define a data type for recording info about an argument list
        !           466:    during the scan of that argument list.  This data type should
        !           467:    hold all necessary information about the function itself
        !           468:    and about the args processed so far, enough to enable macros
        !           469:    such as FUNCTION_ARG to determine where the next arg should go.
        !           470: 
        !           471:    For 1750A, this is a single integer, which is a number of words
        !           472:    of arguments scanned so far.  */
        !           473: 
        !           474: #define CUMULATIVE_ARGS int
        !           475: 
        !           476: /* Initialize a variable CUM of type CUMULATIVE_ARGS
        !           477:    for a call to a function whose data type is FNTYPE.
        !           478:    For a library call, FNTYPE is 0.
        !           479: 
        !           480:    For 1750A, the offset starts at 0.  */
        !           481: 
        !           482: #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME)   ((CUM) = 0)
        !           483: 
        !           484: /* Update the data in CUM to advance over an argument
        !           485:    of mode MODE and data type TYPE.
        !           486:    (TYPE is null for libcalls where that information may not be available.)
        !           487: 
        !           488:    1750 note: "int_size_in_bytes()" returns a unit relative to
        !           489:    BITS_PER_UNIT, so in our case not bytes, but 16-bit words.  */
        !           490: 
        !           491: #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)   \
        !           492:  ((CUM) += (MODE) == BLKmode ? int_size_in_bytes(TYPE) : GET_MODE_SIZE(MODE))
        !           493: 
        !           494: /* Define where to put the arguments to a function.
        !           495:    Value is zero to push the argument on the stack,
        !           496:    or a hard register in which to store the argument.
        !           497: 
        !           498:    MODE is the argument's machine mode.
        !           499:    TYPE is the data type of the argument (as a tree).
        !           500:     This is null for libcalls where that information may
        !           501:     not be available.
        !           502:    CUM is a variable of type CUMULATIVE_ARGS which gives info about
        !           503:     the preceding args and about the function being called.
        !           504:    NAMED is nonzero if this argument is a named parameter
        !           505:     (otherwise it is an extra parameter matching an ellipsis).  */
        !           506: 
        !           507: #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
        !           508:        (rtx) function_arg(CUM,MODE,TYPE,NAMED)
        !           509: /*
        !           510:  (! MUST_PASS_IN_STACK(MODE,TYPE) &&                           \
        !           511:   14 >= (CUM) +                                                        \
        !           512:   ((MODE)==BLKmode ? int_size_in_bytes(TYPE) : GET_MODE_SIZE (MODE))  \
        !           513:  ? gen_rtx (REG, MODE, CUM)                                    \
        !           514:  : 0)
        !           515: */
        !           516: 
        !           517: /* Define the following macro if function calls on the target machine
        !           518:    do not preserve any registers; in other words, if `CALL_USED_REGISTERS'
        !           519:    has 1 for all registers. This macro enables `-fcaller-saves' by
        !           520:    default. Eventually that option will be nabled by default on all
        !           521:    machines and both the option and this macro will be eliminated. */
        !           522: 
        !           523: #define DEFAULT_CALLER_SAVES
        !           524: 
        !           525: 
        !           526: /* This macro generates the assembly code for function entry.
        !           527:    FILE is a stdio stream to output the code to.
        !           528:    SIZE is an int: how many units of temporary storage to allocate.
        !           529:    Refer to the array `regs_ever_live' to determine which registers
        !           530:    to save; `regs_ever_live[I]' is nonzero if register number I
        !           531:    is ever used in the function.  This macro is responsible for
        !           532:    knowing which registers should not be saved even if used.  */
        !           533: 
        !           534: 
        !           535: #define FUNCTION_PROLOGUE(FILE, SIZE) {   \
        !           536:   register int regno, none_used=1;                             \
        !           537:   extern char call_used_regs[];                                        \
        !           538:   fprintf(FILE, "; regs used in this function: ");             \
        !           539:   for (regno = 0; regno < 15; regno++)                         \
        !           540:     if (regs_ever_live[regno]) {                               \
        !           541:        fprintf(FILE," %s",reg_names[regno]);                   \
        !           542:        none_used = 0;                                          \
        !           543:     }                                                          \
        !           544:   if (none_used)                                               \
        !           545:     fprintf(FILE," (none)");                                   \
        !           546:   fprintf(FILE,"\n");                                          \
        !           547:   if (SIZE > 0)                                                        \
        !           548:     fprintf(FILE,"\t%s\tr15,%d  ; reserve local-variable space\n",\
        !           549:                         (SIZE <= 16 ? "sisp" : "sim"),SIZE);   \
        !           550:   fprintf(FILE,"\tpshm\tr14,r14 ; push old frame\n");          \
        !           551:   fprintf(FILE,"\tlr\tr14,r15 ; set new frame\n");             \
        !           552:   program_counter = 0; jmplbl_ndx = -1;                                \
        !           553: }
        !           554: 
        !           555: /************* 1750: PROFILER HANDLING NOT YET DONE !!!!!!! *************/
        !           556: /* Output assembler code to FILE to increment profiler label # LABELNO
        !           557:    for profiling a function entry.  */
        !           558: 
        !           559: #define FUNCTION_PROFILER(FILE, LABELNO)  \
        !           560:   fprintf (FILE, "; got into FUNCTION_PROFILER with label # %d\n", (LABELNO))
        !           561: 
        !           562: /* Output assembler code to FILE to initialize this source file's
        !           563:    basic block profiling info, if that has not already been done.  */
        !           564: #define FUNCTION_BLOCK_PROFILER(FILE, LABELNO)  \
        !           565:   fprintf (FILE, "; got into FUNCTION_BLOCK_PROFILER with label # %d\n",LABELNO)
        !           566: 
        !           567: /* Output assembler code to FILE to increment the entry-count for
        !           568:    the BLOCKNO'th basic block in this source file.  */
        !           569: #define BLOCK_PROFILER(FILE, BLOCKNO)  \
        !           570:   fprintf (FILE, "; got into BLOCK_PROFILER with block # %d\n",BLOCKNO)
        !           571: 
        !           572: /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
        !           573:    the stack pointer does not matter.  The value is tested only in
        !           574:    functions that have frame pointers.
        !           575:    No definition is equivalent to always zero.  */
        !           576: 
        !           577: #define EXIT_IGNORE_STACK 1
        !           578: 
        !           579: /* This macro generates the assembly code for function exit,
        !           580:    on machines that need it.  If FUNCTION_EPILOGUE is not defined
        !           581:    then individual return instructions are generated for each
        !           582:    return statement.  Args are same as for FUNCTION_PROLOGUE.
        !           583: 
        !           584:    The function epilogue should not depend on the current stack pointer!
        !           585:    It should use the frame pointer only.  This is mandatory because
        !           586:    of alloca; we also take advantage of it to omit stack adjustments
        !           587:    before returning. */
        !           588: 
        !           589: #define FUNCTION_EPILOGUE(FILE, SIZE) {                        \
        !           590:   if (SIZE > 0)                                                        \
        !           591:     fprintf(FILE,"\t%s\tr14,%d ; free up local-var space\n",   \
        !           592:                         (SIZE <= 16 ? "aisp" : "aim"),SIZE);   \
        !           593:   fprintf(FILE,"\tlr\tr15,r14 ; set stack to return addr\n");  \
        !           594:   fprintf(FILE,"\tpopm\tr14,r14 ; restore prev. frame ptr\n"); \
        !           595:   fprintf(FILE,"\turs\tr15\n"); }
        !           596: 
        !           597: /* If the memory address ADDR is relative to the frame pointer,
        !           598:    correct it to be relative to the stack pointer instead.
        !           599:    This is for when we don't use a frame pointer.
        !           600:    ADDR should be a variable name. */
        !           601: 
        !           602: #define FIX_FRAME_POINTER_ADDRESS(ADDR,DEPTH)  \
        !           603:    fprintf(stderr,"FIX_FRAME_POINTER_ADDRESS called, DEPTH=%d\n"), \
        !           604:            DEPTH), abort()
        !           605: 
        !           606: /* Store in the variable DEPTH the initial difference between the
        !           607:    frame pointer reg contents and the stack pointer reg contents,
        !           608:    as of the start of the function body.  This depends on the layout
        !           609:    of the fixed parts of the stack frame and on how registers are saved.
        !           610: */
        !           611: #define INITIAL_FRAME_POINTER_OFFSET(DEPTH) DEPTH = 0
        !           612: 
        !           613: /* 1750: not needed 'cause we have INITIAL_FRAME_POINTER_OFFSET.
        !           614:    #define ELIMINABLE_REGS { \
        !           615:        { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM },  \
        !           616:        { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM },  \
        !           617:        { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM } }
        !           618: 
        !           619:    #define CAN_ELIMINATE(FROM, TO)   1
        !           620: 
        !           621:    #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) { OFFSET = 0; }
        !           622: */
        !           623: 
        !           624: 
        !           625: /* Output assembler code for a block containing the constant parts
        !           626:    of a trampoline, leaving space for the variable parts.  */
        !           627: 
        !           628: #define TRAMPOLINE_TEMPLATE(FILE)  fprintf(FILE,"TRAMPOLINE_TEMPLATE called\n")
        !           629: 
        !           630: /* Length in units of the trampoline for entering a nested function.  */
        !           631: 
        !           632: #define TRAMPOLINE_SIZE 2
        !           633: 
        !           634: /* Emit RTL insns to initialize the variable parts of a trampoline.
        !           635:    FNADDR is an RTX for the address of the function's pure code.
        !           636:    CXT is an RTX for the static chain value for the function.  */
        !           637: 
        !           638: #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)  printf("INITIALIZE_TRAMPO called\n")
        !           639: /* {                                                                   \
        !           640:   emit_move_insn (gen_rtx (MEM, QImode, plus_constant (TRAMP, 1)), CXT); \
        !           641:   emit_move_insn (gen_rtx (MEM, QImode, plus_constant (TRAMP, 6)), FNADDR); \
        !           642: } */
        !           643: 
        !           644: 
        !           645: /*****************************************************************************/
        !           646: 
        !           647: /* Addressing modes, and classification of registers for them.  */
        !           648: 
        !           649: /* 1750 doesn't have a lot of auto-incr./decr. - just for the stack ptr. */
        !           650: 
        !           651: /* #define HAVE_POST_INCREMENT  just for R15 (stack pointer) */
        !           652: /* #define HAVE_POST_DECREMENT */
        !           653: /* #define HAVE_PRE_DECREMENT   just for R15 (stack pointer) */
        !           654: /* #define HAVE_PRE_INCREMENT */
        !           655: 
        !           656: /* Macros to check register numbers against specific register classes.  */
        !           657: 
        !           658: /* These assume that REGNO is a hard or pseudo reg number.
        !           659:    They give nonzero only if REGNO is a hard reg of the suitable class
        !           660:    or a pseudo reg currently allocated to a suitable hard reg.
        !           661:    Since they use reg_renumber, they are safe only once reg_renumber
        !           662:    has been allocated, which happens in local-alloc.c. 
        !           663:    1750 note: The words BASE and INDEX are used in their GCC senses:
        !           664:    The "Index Registers", R12 through R15, can have an address displacement
        !           665:    int the range 0..255 words.
        !           666:    */
        !           667: 
        !           668: #define REGNO_OK_FOR_BASE_P(REGNO)  \
        !           669:  ((REGNO) > 0 && (REGNO) <= 15 ||   \
        !           670:   reg_renumber[REGNO] > 0 && reg_renumber[REGNO] < 15)
        !           671: #define REGNO_OK_FOR_INDEX_P(REGNO) \
        !           672:  ((REGNO) >= 12 && (REGNO) <= 15 || \
        !           673:   reg_renumber[REGNO] >= 12 && reg_renumber[REGNO] <= 15)
        !           674: 
        !           675: /* Now macros that check whether X is a register and also,
        !           676:    strictly, whether it is in a specified class.
        !           677: 
        !           678: /* 1 if X is an address register  */
        !           679: 
        !           680: #define ADDRESS_REG_P(X) (REG_P (X) && REGNO_OK_FOR_BASE_P (REGNO (X)))
        !           681: 
        !           682: /* Maximum number of registers that can appear in a valid memory address.  */
        !           683: #define MAX_REGS_PER_ADDRESS 1
        !           684: 
        !           685: /* Recognize any constant value that is a valid address.  */
        !           686: 
        !           687: #define CONSTANT_ADDRESS_P(X)  CONSTANT_P(X)
        !           688: 
        !           689: /* Nonzero if the constant value X is a legitimate general operand.
        !           690:    It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.  */
        !           691: 
        !           692: #define LEGITIMATE_CONSTANT_P(X) 1
        !           693: 
        !           694: /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
        !           695:    and check its validity for a certain class.
        !           696:    We have two alternate definitions for each of them.
        !           697:    The usual definition accepts all pseudo regs; the other rejects
        !           698:    them unless they have been allocated suitable hard regs.
        !           699:    The symbol REG_OK_STRICT causes the latter definition to be used.
        !           700: 
        !           701:    Most source files want to accept pseudo regs in the hope that
        !           702:    they will get allocated to the class that the insn wants them to be in.
        !           703:    Source files for reload pass need to be strict.
        !           704:    After reload, it makes no difference, since pseudo regs have
        !           705:    been eliminated by then.  */
        !           706: 
        !           707: #ifdef REG_OK_STRICT
        !           708: 
        !           709: /* Nonzero if X is a hard reg that can be used as an index.  */
        !           710: #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
        !           711: /* Nonzero if X is a hard reg that can be used as a base reg.  */
        !           712: #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
        !           713: 
        !           714: #else
        !           715: 
        !           716: /* Nonzero if X is a hard reg that can be used as an index
        !           717:    or if it is a pseudo reg.  */
        !           718: #define REG_OK_FOR_INDEX_P(X) (REGNO (X) >= 12)
        !           719: /* Nonzero if X is a hard reg that can be used as a base reg
        !           720:    or if it is a pseudo reg.  */
        !           721: #define REG_OK_FOR_BASE_P(X) (REGNO (X) > 0)
        !           722: 
        !           723: #endif
        !           724: 
        !           725: 
        !           726: /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
        !           727:    that is a valid memory address for an instruction.
        !           728:    The MODE argument is the machine mode for the MEM expression
        !           729:    that wants to use this address.
        !           730:    The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS.
        !           731: 
        !           732:    1750 note: Currently we don't implement address expressions that use
        !           733:    GCC "Index"-class regs. To be expanded to handle the 1750 "Base with Index"
        !           734:    instructions (see also MAX_REGS_PER_ADDRESS and others). */
        !           735: 
        !           736: #define GO_IF_BASED_ADDRESS(X, ADDR) {                                 \
        !           737:    if ((GET_CODE (X) == REG && REG_OK_FOR_BASE_P(X)))                  \
        !           738:      goto ADDR;                                                                \
        !           739:    if (GET_CODE (X) == PLUS)                                           \
        !           740:     { register rtx x0 = XEXP(X,0), x1 = XEXP(X,1);                     \
        !           741:       if ((REG_P(x0) && REG_OK_FOR_BASE_P(x0) && CONSTANT_ADDRESS_P(x1)) \
        !           742:        || (REG_P(x1) && REG_OK_FOR_BASE_P(x1) && CONSTANT_ADDRESS_P(x0))) \
        !           743:      goto ADDR; } }
        !           744: 
        !           745: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) {                      \
        !           746:        if (CONSTANT_ADDRESS_P(X)) goto ADDR;                           \
        !           747:        GO_IF_BASED_ADDRESS(X,ADDR) }
        !           748: 
        !           749: 
        !           750: /* Try machine-dependent ways of modifying an illegitimate address
        !           751:    to be legitimate.  If we find one, return the new, valid address.
        !           752:    This macro is used in only one place: `memory_address' in explow.c.
        !           753: 
        !           754:    OLDX is the address as it was before break_out_memory_refs was called.
        !           755:    In some cases it is useful to look at this to decide what needs to be done.
        !           756: 
        !           757:    MODE and WIN are passed so that this macro can use
        !           758:    GO_IF_LEGITIMATE_ADDRESS.
        !           759: 
        !           760:    It is always safe for this macro to do nothing.  It exists to recognize
        !           761:    opportunities to optimize the output. */
        !           762: 
        !           763: #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN)
        !           764: 
        !           765: /* Go to LABEL if ADDR (a legitimate address expression)
        !           766:    has an effect that depends on the machine mode it is used for.
        !           767:    On the 68000, only predecrement and postincrement address depend thus
        !           768:    (the amount of decrement or increment being the length of the operand).  */
        !           769: /* 1750: not used. */
        !           770: 
        !           771: #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)
        !           772: 
        !           773: /*****************************************************************************/
        !           774: 
        !           775: /* Specify the machine mode that this machine uses
        !           776:    for the index in the tablejump instruction.  */
        !           777: #define CASE_VECTOR_MODE QImode
        !           778: 
        !           779: /* Define this if the tablejump instruction expects the table
        !           780:    to contain offsets from the address of the table.
        !           781:    Do not define this if the table should contain absolute addresses. */
        !           782: /* #define CASE_VECTOR_PC_RELATIVE */
        !           783: 
        !           784: /* Specify the tree operation to be used to convert reals to integers.  */
        !           785: #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
        !           786: 
        !           787: /* This is the kind of divide that is easiest to do in the general case.  */
        !           788: #define EASY_DIV_EXPR TRUNC_DIV_EXPR
        !           789: 
        !           790: /* Define this as 1 if `char' should by default be signed; else as 0.  */
        !           791: #define DEFAULT_SIGNED_CHAR 0
        !           792: 
        !           793: /* Max number of bytes we can move from memory to memory
        !           794:    in one reasonably fast instruction.  */
        !           795: /* (was: "1750: not counting the MOV instruction") */
        !           796: #define MOVE_MAX 16
        !           797: 
        !           798: /* Define this if zero-extension is slow (more than one real instruction).  */
        !           799: /* #define SLOW_ZERO_EXTEND */
        !           800: 
        !           801: /* Nonzero if access to memory by bytes is slow and undesirable.  */
        !           802: #define SLOW_BYTE_ACCESS 0
        !           803: 
        !           804: /* Define if shifts truncate the shift count
        !           805:    which implies one can omit a sign-extension or zero-extension
        !           806:    of a shift count. */
        !           807: /* #define SHIFT_COUNT_TRUNCATED 1 */
        !           808: 
        !           809: /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
        !           810:    is done just by pretending it is already truncated.  */
        !           811: #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
        !           812: 
        !           813: /* We assume that the store-condition-codes instructions store 0 for false
        !           814:    and some other value for true.  This is the value stored for true.  */
        !           815: 
        !           816: #define STORE_FLAG_VALUE 1
        !           817: 
        !           818: /* When a prototype says `char' or `short', really pass an `int'. 
        !           819:    1750: for now, `char' is 16 bits wide anyway.
        !           820:    #define PROMOTE_PROTOTYPES */
        !           821: 
        !           822: /* Specify the machine mode that pointers have.
        !           823:    After generation of rtl, the compiler makes no further distinction
        !           824:    between pointers and any other objects of this machine mode.  */
        !           825: #define Pmode QImode
        !           826: 
        !           827: /* A function address in a call instruction
        !           828:    is a 16-bit address (for indexing purposes) */
        !           829: #define FUNCTION_MODE QImode
        !           830: 
        !           831: /* Compute the cost of computing a constant rtl expression RTX
        !           832:    whose rtx-code is CODE.  The body of this macro is a portion
        !           833:    of a switch statement.  If the code is computed here,
        !           834:    return it with a return statement.  Otherwise, break from the switch.  */
        !           835: /* 1750 note: haven't paid attention to this yet. */
        !           836: 
        !           837: #define CONST_COSTS(RTX,CODE,OUTER_CODE) \
        !           838:   case CONST_INT:                                              \
        !           839:     if (INTVAL(RTX) >= -16 && INTVAL(RTX) <= 16) return 1;     \
        !           840:   case CONST:                                                  \
        !           841:   case LABEL_REF:                                              \
        !           842:   case SYMBOL_REF:                                             \
        !           843:     return 5;                                                  \
        !           844:   case CONST_DOUBLE:                                           \
        !           845:     return 7;
        !           846: 
        !           847: #define ADDRESS_COST(ADDRESS)  (memop_valid(ADDRESS) ?  3 : 1000)
        !           848: 
        !           849: /* Tell final.c how to eliminate redundant test instructions.  */
        !           850: 
        !           851: /* Here we define machine-dependent flags and fields in cc_status
        !           852:    (see `conditions.h').  */
        !           853: /* MIL-STD-1750: none -- just has the garden variety C,P,Z,N flags. */
        !           854: 
        !           855: /* Store in cc_status the expressions
        !           856:    that the condition codes will describe
        !           857:    after execution of an instruction whose pattern is EXP.
        !           858:    Do not alter them if the instruction would not alter the cc's.
        !           859:    1750: See file out-1750a.c for notice_update_cc().  */
        !           860: 
        !           861: #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP)
        !           862: 
        !           863: /**********************************************/
        !           864: /* Produce debugging info in the DWARF format 
        !           865:    #define DWARF_DEBUGGING_INFO
        !           866: */
        !           867: 
        !           868: /*****************************************************************************/
        !           869: 
        !           870: /* Control the assembler format that we output.  */
        !           871: 
        !           872: /* Output at beginning of assembler file.  */
        !           873: 
        !           874: #define ASM_FILE_START(FILE)   {                                       \
        !           875:    char *p, name[40];                                                  \
        !           876:    if ((p = (char *)strrchr(main_input_filename,'/')) != NULL ? 1 :    \
        !           877:        (p = (char *)strrchr(main_input_filename,']')) != NULL)         \
        !           878:        p++;                                                            \
        !           879:    else                                                                        \
        !           880:        p = main_input_filename;                                        \
        !           881:    strcpy(name,p);                                                     \
        !           882:    if (p = (char *)strchr(name,'.'))                                   \
        !           883:        *p = '\0';                                                      \
        !           884:    fprintf(FILE,"\tname %s\n",name);                                   \
        !           885:    fprintf(FILE,"\tnolist\n\tinclude \"ms1750.inc\"\n\tlist\n\n");     \
        !           886:    fprintf(FILE,"\tglobal\t__main\n\n");  }
        !           887: 
        !           888: /* Output at end of assembler file.  
        !           889:    For 1750, we copy the data labels accrued in datalbl[] from the Constants 
        !           890:    section (Konst) to the Writable-Data section (Static).     */
        !           891: 
        !           892: #define ASM_FILE_END(FILE)     \
        !           893:    do {                                                                        \
        !           894:       if (datalbl_ndx >= 0) {                                          \
        !           895:          int i, cum_size=0;                                            \
        !           896:          fprintf(FILE,"\n\tstatic\ninit_srel\n");                      \
        !           897:          for (i = 0; i <= datalbl_ndx; i++) {                          \
        !           898:            if (datalbl[i].name == NULL)                                \
        !           899:            {                                                           \
        !           900:               fprintf(stderr, "asm_file_end internal datalbl err\n");  \
        !           901:               exit (0);                                                \
        !           902:            }                                                           \
        !           903:             fprintf(FILE,"%s \tblock %d\n",                            \
        !           904:                  datalbl[i].name,datalbl[i].size);                     \
        !           905:             cum_size += datalbl[i].size;                               \
        !           906:         }                                                              \
        !           907:          fprintf(FILE,"\n\tinit\n");                                   \
        !           908:          fprintf(FILE,"\tlim\tr0,init_srel\n");           /* destin. */        \
        !           909:          fprintf(FILE,"\tlim\tr1,%d\n",cum_size);         /* count */  \
        !           910:          fprintf(FILE,"\tlim\tr2,K%s\n",datalbl[0].name); /* source */ \
        !           911:          fprintf(FILE,"\tmov\tr0,r2\n");                               \
        !           912:          fprintf(FILE,"\n\tnormal\n");                                 \
        !           913:          datalbl_ndx = -1;                     /* reset stuff */       \
        !           914:          for (i = 0; i < DATALBL_ARRSIZ; i++)                          \
        !           915:             datalbl[i].size = 0;                                       \
        !           916:       }                                                                        \
        !           917:       fprintf(FILE,"\n\tend\n");                                       \
        !           918:    } while (0)
        !           919: 
        !           920: /* Output to assembler file text saying following lines
        !           921:    may contain character constants, extra white space, comments, etc.  */
        !           922: 
        !           923: #define ASM_APP_ON "\n\tif 0\n; by ASM_APP_ON\n"
        !           924: 
        !           925: /* Output to assembler file text saying following lines
        !           926:    no longer contain unusual constructs.  */
        !           927: 
        !           928: #define ASM_APP_OFF "\n\tendif\n"
        !           929: 
        !           930: 
        !           931: #define EXTRA_SECTIONS  in_readonly_data
        !           932: 
        !           933: #define EXTRA_SECTION_FUNCTIONS                \
        !           934:     void const_section()                               \
        !           935:     {                                                  \
        !           936:        fprintf(asm_out_file,"\tkonst\n");              \
        !           937:        current_section = Konst;                                \
        !           938:     }                                                  \
        !           939:     check_section(enum section sect)                   \
        !           940:     {                                                  \
        !           941:         if (current_section != sect) {                 \
        !           942:            fprintf(asm_out_file,"\t%s\n",sectname[(int)sect]); \
        !           943:            current_section = sect;                     \
        !           944:        }                                               \
        !           945:        switch (sect) {                                 \
        !           946:          case Init:                                    \
        !           947:          case Normal:                                  \
        !           948:            in_section = in_text;                       \
        !           949:            break;                                      \
        !           950:          case Static:                                  \
        !           951:            in_section = in_data;                       \
        !           952:            break;                                      \
        !           953:          case Konst:                                   \
        !           954:            in_section = in_readonly_data;              \
        !           955:            break;                                      \
        !           956:        }                                               \
        !           957:     }
        !           958: 
        !           959:                
        !           960: /* Function that switches to the read-only data section (optional) */
        !           961: #define READONLY_DATA_SECTION  const_section
        !           962: 
        !           963: /* Output before program init section */
        !           964: #define INIT_SECTION_ASM_OP "\n\tinit     ; init_section\n"
        !           965: 
        !           966: /* Output before program text section */
        !           967: #define TEXT_SECTION_ASM_OP "\n\tnormal   ; text_section\n"
        !           968: 
        !           969: /* Output before writable data.  */
        !           970: #define DATA_SECTION_ASM_OP "\n\tstatic   ; data_section\n"
        !           971: 
        !           972: /* How to refer to registers in assembler output.
        !           973:    This sequence is indexed by compiler's hard-register-number (see above).  */
        !           974: 
        !           975: #define REGISTER_NAMES \
        !           976:  { "0", "1", "2", "3", "4", "5", "6", "7", \
        !           977:    "8", "9","10","11","12","13","14","15" }
        !           978: 
        !           979: /* How to renumber registers for dbx and gdb. */
        !           980: 
        !           981: #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
        !           982: 
        !           983: /******************  Assembler output formatting  **********************/
        !           984: 
        !           985: #define ASM_IDENTIFY_GCC(FILE)  fputs ("; gcc2_compiled:\n", FILE)
        !           986: 
        !           987: #define ASM_COMMENT_START  ";"
        !           988: 
        !           989: #define ASM_OUTPUT_FUNNAM(FILE,NAME)   \
        !           990:        fprintf(FILE,"%s\n",NAME)
        !           991: 
        !           992: #define ASM_OUTPUT_OPCODE(FILE,PTR)  do {              \
        !           993:        while (*(PTR) != '\0' && *(PTR) != ' ') {       \
        !           994:            putc (*(PTR), FILE);                        \
        !           995:            (PTR)++;                                    \
        !           996:          }                                             \
        !           997:        while (*(PTR) == ' ')                           \
        !           998:            (PTR)++;                                    \
        !           999:        putc ('\t', FILE);                              \
        !          1000:        program_counter += 2;                           \
        !          1001:      } while (0)
        !          1002: 
        !          1003: #define ASM_DECLARE_FUNCTION_NAME(FILE,NAME,DECL)      \
        !          1004:        fprintf(FILE,"%s\n",NAME)
        !          1005: 
        !          1006: /* This is how to output the definition of a user-level label named NAME,
        !          1007:    such as the label on a static function or variable NAME.  */
        !          1008: /* 1750 note: Labels are prefixed with a 'K'. This is because handling
        !          1009:    has been changed for labels to be output in the "Constants" section
        !          1010:    (named "Konst"), and special initialization code takes care of copying
        !          1011:    the Const-section data into the writable data section (named "Static").
        !          1012:    In the Static section we therefore have the true label names (i.e.
        !          1013:    not prefixed with 'K').  */
        !          1014: 
        !          1015: #define ASM_OUTPUT_LABEL(FILE,NAME)    \
        !          1016:   do {  if (NAME[0] == '.') {                                  \
        !          1017:           fprintf(stderr,"Oops! label %s can't begin with '.'\n",NAME); \
        !          1018:           abort();                                             \
        !          1019:        }                                                       \
        !          1020:        else {                                                  \
        !          1021:           check_section(Konst);                                \
        !          1022:           fprintf(FILE,"K%s\n",NAME);                          \
        !          1023:           datalbl[++datalbl_ndx].name = (char *)strdup (NAME); \
        !          1024:           label_pending = 1;                                   \
        !          1025:        }                                                       \
        !          1026:   } while (0)
        !          1027: 
        !          1028: 
        !          1029: /* This is how to output a command to make the user-level label named NAME
        !          1030:    defined for reference from other files.  */
        !          1031: 
        !          1032: #define ASM_GLOBALIZE_LABEL(FILE,NAME) do {            \
        !          1033:           fprintf (FILE, "\tglobal  %s\t; export\n", NAME);    \
        !          1034:   } while (0)
        !          1035: 
        !          1036: /* This is how to output a reference to a user-level label named NAME.
        !          1037:    `assemble_name' uses this.  */
        !          1038: 
        !          1039: #define ASM_OUTPUT_LABELREF(FILE,NAME) \
        !          1040:          fprintf (FILE, "%s", NAME)
        !          1041: 
        !          1042: /* This is how to output an internal numbered label where
        !          1043:    PREFIX is the class of label and NUM is the number within the class.  */
        !          1044: 
        !          1045: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)             \
        !          1046:        do {                                                    \
        !          1047:          if (strcmp(PREFIX,"LC") == 0) {                       \
        !          1048:             label_pending = 1;                                 \
        !          1049:             datalbl[++datalbl_ndx].name = (char *) malloc (9); \
        !          1050:             sprintf(datalbl[datalbl_ndx].name,"LC%d",NUM);     \
        !          1051:             check_section(Konst);                              \
        !          1052:             fprintf(FILE,"K%s%d\n",PREFIX,NUM);                \
        !          1053:          }                                                     \
        !          1054:          else if (find_jmplbl(NUM) < 0) {                      \
        !          1055:             jmplbl[++jmplbl_ndx].num = NUM;                    \
        !          1056:             jmplbl[jmplbl_ndx].pc = program_counter;           \
        !          1057:             fprintf(FILE, "%s%d\n", PREFIX, NUM);              \
        !          1058:          }                                                     \
        !          1059:        } while (0)
        !          1060: 
        !          1061: 
        !          1062: /* This is how to store into the string LABEL
        !          1063:    the symbol_ref name of an internal numbered label where
        !          1064:    PREFIX is the class of label and NUM is the number within the class.
        !          1065:    This is suitable for output with `assemble_name'.  */
        !          1066: 
        !          1067: #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)  \
        !          1068:          sprintf (LABEL, "%s%d", PREFIX, NUM)
        !          1069: 
        !          1070: /* This is how to output an assembler line defining a 1750A `float'
        !          1071:    constant.  */
        !          1072: 
        !          1073: #define ASM_OUTPUT_SHORT_FLOAT(FILE,VALUE)                     \
        !          1074:   do {                                                         \
        !          1075:       if (label_pending)                                       \
        !          1076:         label_pending = 0;                                     \
        !          1077:       else                                                     \
        !          1078:          datalbl[++datalbl_ndx].name = float_label('D',VALUE); \
        !          1079:       sprintf (datalbl[datalbl_ndx].value, "%lf", (double) VALUE); \
        !          1080:       datalbl[datalbl_ndx].size = 2;                           \
        !          1081:       fprintf (FILE, "\tdataf\t%lf\n",VALUE);                  \
        !          1082:   } while(0)
        !          1083: 
        !          1084: /* This is how to output an assembler line defining a 1750A `double'
        !          1085:     constant. */
        !          1086: 
        !          1087: #define ASM_OUTPUT_THREE_QUARTER_FLOAT(FILE,VALUE)             \
        !          1088:   do {                                                         \
        !          1089:       if (label_pending)                                       \
        !          1090:         label_pending = 0;                                     \
        !          1091:       else                                                     \
        !          1092:          datalbl[++datalbl_ndx].name = float_label('E',VALUE); \
        !          1093:       sprintf (datalbl[datalbl_ndx].value, "%lf", VALUE);      \
        !          1094:       datalbl[datalbl_ndx].size = 3;                           \
        !          1095:       fprintf(FILE,"\tdataef\t%lf\n",VALUE);                   \
        !          1096:   } while (0)
        !          1097: 
        !          1098: /* This is how to output an assembler line defining a string constant.  */
        !          1099: 
        !          1100: #define ASM_OUTPUT_ASCII(FILE, PTR, LEN)  do {         \
        !          1101:        int i;                                                          \
        !          1102:        if (! label_pending)                                            \
        !          1103:           fprintf(FILE,";in ASM_OUTPUT_ASCII without label_pending\n");\
        !          1104:        else {                                                          \
        !          1105:           label_pending = 0;                                           \
        !          1106:           datalbl[datalbl_ndx].size = LEN;                             \
        !          1107:        }                                                               \
        !          1108:        for (i = 0; i < LEN; i++)                                       \
        !          1109:          if (PTR[i] >= 32 && PTR[i] < 127)                             \
        !          1110:            fprintf(FILE,"\tdata\t%d\t; '%c'\n",PTR[i],PTR[i]);         \
        !          1111:          else                                                          \
        !          1112:            fprintf(FILE,"\tdata\t%d\t; (ascii)\n",PTR[i]);             \
        !          1113:   } while (0)
        !          1114: 
        !          1115: /* This is how to output an assembler line defining an `int' constant.  */
        !          1116: 
        !          1117: #define ASM_OUTPUT_INT(FILE,VALUE)  do {         \
        !          1118:        if (! label_pending)                                            \
        !          1119:           fprintf(FILE,";in ASM_OUTPUT_INT without label_pending\n");  \
        !          1120:        else {                                                          \
        !          1121:           label_pending = 0;                                           \
        !          1122:           datalbl[datalbl_ndx].size = 1;                               \
        !          1123:        }                                                               \
        !          1124:        fprintf(FILE, "\tdata\t"); output_addr_const(FILE,VALUE);       \
        !          1125:        fprintf(FILE, "\n"); } while (0)
        !          1126: 
        !          1127: /* This is how to output an assembler line defining a `long int' constant. */
        !          1128: 
        !          1129: #define ASM_OUTPUT_LONG_INT(FILE,VALUE) do {     \
        !          1130:        if (! label_pending)                                            \
        !          1131:           fprintf(FILE,";in ASM_OUTPUT_LONG_INT without label_pending\n");\
        !          1132:        else {                                                          \
        !          1133:           label_pending = 0;                                           \
        !          1134:           datalbl[datalbl_ndx].size = 2;                               \
        !          1135:        }                                                               \
        !          1136:        fprintf(FILE, "\tdatal\t"); output_addr_const(FILE,VALUE);      \
        !          1137:        fprintf(FILE, "\n"); } while (0)
        !          1138: 
        !          1139: /* Likewise for `short' and `char' constants.  */
        !          1140: 
        !          1141: #define ASM_OUTPUT_SHORT(FILE,VALUE)  ASM_OUTPUT_INT(FILE,VALUE)
        !          1142: 
        !          1143: /* For 1750, we treat char same as word. Tektronix 1750
        !          1144:    Assembler does a better (packing) job with strings.  */
        !          1145: #define ASM_OUTPUT_CHAR(FILE,VALUE)   ASM_OUTPUT_INT(FILE,VALUE)
        !          1146: 
        !          1147: /* This is how to output an assembler line for a numeric constant byte.  */
        !          1148: /* 1750: For the time being, treating this same as word. Tektronix 1750
        !          1149:    Assembler does a better (packing) job with strings.  */
        !          1150: #define ASM_OUTPUT_BYTE(FILE,VALUE)  ASM_OUTPUT_INT(FILE,VALUE)
        !          1151: 
        !          1152: /* This is how to output an insn to push a register on the stack.
        !          1153:    It need not be very fast code.  */
        !          1154: 
        !          1155: #define ASM_OUTPUT_REG_PUSH(FILE,REGNO)  \
        !          1156:   fprintf (FILE, "\tPSHM R%s,R%s\n", reg_names[REGNO])
        !          1157: 
        !          1158: /* This is how to output an insn to pop a register from the stack.
        !          1159:    It need not be very fast code.  */
        !          1160: 
        !          1161: #define ASM_OUTPUT_REG_POP(FILE,REGNO)  \
        !          1162:        fprintf (FILE, "\tPOPM R%s,R%s\n", reg_names[REGNO])
        !          1163: 
        !          1164: /* This is how to output an element of a case-vector that is absolute. */
        !          1165: 
        !          1166: #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)   \
        !          1167:        fprintf (FILE, "\tdata\tL%d ;addr_vec_elt\n", VALUE)
        !          1168: 
        !          1169: /* This is how to output an element of a case-vector that is relative.  */
        !          1170: 
        !          1171: #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL)  \
        !          1172:        fprintf (FILE, "\tdata\tL%d-L%d ;addr_diff_elt\n", VALUE,REL)
        !          1173: 
        !          1174: /* This is how to output an assembler line
        !          1175:    that says to advance the location counter
        !          1176:    to a multiple of 2**LOG bytes.  */
        !          1177: 
        !          1178: #define ASM_OUTPUT_ALIGN(FILE,LOG)     \
        !          1179:  fprintf(FILE,"; in ASM_OUTPUT_ALIGN: pwr_of_2_bytcnt=%d\n",LOG)
        !          1180: 
        !          1181: #define ASM_OUTPUT_SKIP(FILE,SIZE)     \
        !          1182:    fprintf(FILE,"; in ASM_OUTPUT_SKIP: size=%d\n",SIZE)
        !          1183: 
        !          1184: /* This says how to output an assembler line
        !          1185:    to define a global common symbol.  */
        !          1186: 
        !          1187: #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  do {     \
        !          1188:        fprintf (FILE, "\tcommon  %s,%d\n", NAME, SIZE);        \
        !          1189:      } while (0)
        !          1190: 
        !          1191: #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME)  do {            \
        !          1192:        fprintf (FILE, "\tglobal  %s\t; import\n", NAME);       \
        !          1193:      }  while (0)
        !          1194: 
        !          1195: /* This says how to output an assembler line
        !          1196:    to define a local common symbol.  */
        !          1197: 
        !          1198: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  do {  \
        !          1199:        check_section (Static);                                 \
        !          1200:        fprintf(FILE,"%s \tblock   %d\t; local common\n",NAME,SIZE);    \
        !          1201:      } while (0)
        !          1202: 
        !          1203: /* Store in OUTPUT a string (made with alloca) containing
        !          1204:    an assembler-name for a local static variable named NAME.
        !          1205:    LABELNO is an integer which is different for each call.  */
        !          1206: 
        !          1207: #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
        !          1208: ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10),   \
        !          1209:   sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
        !          1210: 
        !          1211: #define ASM_OUTPUT_CONSTRUCTOR(FILE, NAME)  do {       \
        !          1212:        fprintf(FILE, "\tinit\n\t"); assemble_name(NAME); \
        !          1213:         fprintf(FILE,"  ;constructor"); } while (0)
        !          1214: 
        !          1215: #define ASM_OUTPUT_DESTRUCTOR(FILE, NAME)  do {        \
        !          1216:        fprintf(FILE, "\tinit\n\t"); assemble_name(NAME); \
        !          1217:         fprintf(FILE,"  ;destructor"); } while (0)
        !          1218: 
        !          1219: /* Define the parentheses used to group arithmetic operations
        !          1220:    in assembler code.  */
        !          1221: 
        !          1222: #define ASM_OPEN_PAREN "("
        !          1223: #define ASM_CLOSE_PAREN ")"
        !          1224: 
        !          1225: /* Define results of standard character escape sequences.  */
        !          1226: #define TARGET_BELL    007
        !          1227: #define TARGET_BS      010
        !          1228: #define TARGET_TAB     011
        !          1229: #define TARGET_NEWLINE 012
        !          1230: #define TARGET_VT      013
        !          1231: #define TARGET_FF      014
        !          1232: #define TARGET_CR      015
        !          1233: 
        !          1234: 
        !          1235: /* Print operand X (an rtx) in assembler syntax to file FILE.
        !          1236:    CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
        !          1237:    For `%' followed by punctuation, CODE is the punctuation and X is null.
        !          1238:    1750 note:  there are three special CODE characters:
        !          1239:         'D', 'E': print a reference to a floating point constant (D=double,
        !          1240:                  E=single precision) label name
        !          1241:        'F': print a label defining a floating-point constant value
        !          1242:        'J': print the absolute value of a negative INT_CONST
        !          1243:             (this is used in LISN/CISN/MISN/SISP and others)   */
        !          1244: 
        !          1245: /* 1750A: see file aux-output.c */
        !          1246: #define PRINT_OPERAND(FILE, X, CODE)  print_operand(FILE,X,CODE)
        !          1247: #define PRINT_OPERAND_ADDRESS(FILE, ADDR)  print_operand_address(FILE,ADDR)
        !          1248: 

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