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Annotation of gcc/config/a29k/a29k.h, revision 1.1

1.1     ! root        1: /* Definitions of target machine for GNU compiler, for AMD Am29000 CPU.
        !             2:    Copyright (C) 1988, 1990, 1991, 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 "-D_AM29K -D_AM29000 -D_EPI"
        !            25: 
        !            26: /* Print subsidiary information on the compiler version in use.  */
        !            27: #define TARGET_VERSION
        !            28: 
        !            29: /* Pass -w to assembler.  */
        !            30: #define ASM_SPEC "-w"
        !            31: 
        !            32: /* Run-time compilation parameters selecting different hardware subsets.  */
        !            33: 
        !            34: extern int target_flags;
        !            35: 
        !            36: /* Macro to define tables used to set the flags.
        !            37:    This is a list in braces of pairs in braces,
        !            38:    each pair being { "NAME", VALUE }
        !            39:    where VALUE is the bits to set or minus the bits to clear.
        !            40:    An empty string NAME is used to identify the default VALUE.  */
        !            41: 
        !            42: /* This means that the DW bit will be enabled, to allow direct loads
        !            43:    of bytes.  */
        !            44: 
        !            45: #define TARGET_DW_ENABLE       (target_flags & 1)
        !            46: 
        !            47: /* This means that the external hardware does supports byte writes.  */
        !            48: 
        !            49: #define TARGET_BYTE_WRITES     (target_flags & 2)
        !            50: 
        !            51: /* This means that a "small memory model" has been selected where all
        !            52:    function addresses are known to be within 256K.  This allows CALL to be
        !            53:    used.  */
        !            54: 
        !            55: #define TARGET_SMALL_MEMORY    (target_flags & 4)
        !            56: 
        !            57: /* This means that we are compiling for a 29050.  */
        !            58: 
        !            59: #define TARGET_29050           (target_flags & 8)
        !            60: 
        !            61: /* This means that we are compiling for the kernel which means that we use
        !            62:    gr64-gr95 instead of gr96-126.  */
        !            63: 
        !            64: #define TARGET_KERNEL_REGISTERS        (target_flags & 16)
        !            65: 
        !            66: /* This means that a call to "__msp_check" should be inserted after each stack
        !            67:    adjustment to check for stack overflow.  */
        !            68: 
        !            69: #define TARGET_STACK_CHECK     (target_flags & 32)
        !            70: 
        !            71: /* This handles 29k processors which cannot handle the separation
        !            72:    of a mtsrim insns and a storem insn (most 29000 chips to date, but
        !            73:    not the 29050.  */
        !            74: 
        !            75: #define TARGET_NO_STOREM_BUG   (target_flags & 64)
        !            76: 
        !            77: /* This forces the compiler not to use incoming argument registers except
        !            78:    for copying out arguments.  It helps detect problems when a function is
        !            79:    called with fewer arguments than it is declared with.  */
        !            80: 
        !            81: #define TARGET_NO_REUSE_ARGS   (target_flags & 128)
        !            82: 
        !            83: #define TARGET_SWITCHES                        \
        !            84:   { {"dw", 1},                         \
        !            85:     {"ndw", -1},                       \
        !            86:     {"bw", 2},                         \
        !            87:     {"nbw", - (1|2)},                  \
        !            88:     {"small", 4},                      \
        !            89:     {"large", -4},                     \
        !            90:     {"29050", 8+64},                   \
        !            91:     {"29000", -8},                     \
        !            92:     {"kernel-registers", 16},          \
        !            93:     {"user-registers", -16},           \
        !            94:     {"stack-check", 32},               \
        !            95:     {"no-stack-check", - 32},          \
        !            96:     {"storem-bug", -64},               \
        !            97:     {"no-storem-bug", 64},             \
        !            98:     {"reuse-arg-regs", -128},          \
        !            99:     {"no-reuse-arg-regs", 128},                \
        !           100:     {"", TARGET_DEFAULT}}
        !           101: 
        !           102: #define TARGET_DEFAULT 3
        !           103: 
        !           104: /* Define this to change the optimizations performed by default.  */
        !           105: 
        !           106: #define OPTIMIZATION_OPTIONS(LEVEL)    \
        !           107: {                                      \
        !           108:   if ((LEVEL) > 0)                     \
        !           109:     {                                  \
        !           110:       flag_force_addr = 1;             \
        !           111:       flag_force_mem = 1;              \
        !           112:       flag_omit_frame_pointer = 1;     \
        !           113:     }                                  \
        !           114: }
        !           115: 
        !           116: /* target machine storage layout */
        !           117: 
        !           118: /* Define the types for size_t, ptrdiff_t, and wchar_t.  These are the
        !           119:    same as those used by EPI.  The type for wchar_t does not make much
        !           120:    sense, but is what is used.  */
        !           121: 
        !           122: #define SIZE_TYPE "unsigned int"
        !           123: #define PTRDIFF_TYPE "int"
        !           124: #define WCHAR_TYPE "char"
        !           125: #define WCHAR_TYPE_SIZE BITS_PER_UNIT
        !           126: 
        !           127: /* Define this macro if it is advisable to hold scalars in registers
        !           128:    in a wider mode than that declared by the program.  In such cases, 
        !           129:    the value is constrained to be within the bounds of the declared
        !           130:    type, but kept valid in the wider mode.  The signedness of the
        !           131:    extension may differ from that of the type.  */
        !           132: 
        !           133: #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE)  \
        !           134:   if (GET_MODE_CLASS (MODE) == MODE_INT        \
        !           135:       && GET_MODE_SIZE (MODE) < 4)     \
        !           136:     (MODE) = SImode;
        !           137: 
        !           138: /* Define this if most significant bit is lowest numbered
        !           139:    in instructions that operate on numbered bit-fields.
        !           140:    This is arbitrary on the 29k since it has no actual bit-field insns.
        !           141:    It is better to define this as TRUE because BYTES_BIG_ENDIAN is TRUE
        !           142:    and we want to be able to convert BP position to bit position with
        !           143:    just a shift.  */
        !           144: #define BITS_BIG_ENDIAN 1
        !           145: 
        !           146: /* Define this if most significant byte of a word is the lowest numbered.
        !           147:    This is true on 29k.  */
        !           148: #define BYTES_BIG_ENDIAN 1
        !           149: 
        !           150: /* Define this if most significant word of a multiword number is lowest
        !           151:    numbered. 
        !           152: 
        !           153:    For 29k we can decide arbitrarily since there are no machine instructions
        !           154:    for them.  Might as well be consistent with bytes. */
        !           155: #define WORDS_BIG_ENDIAN 1
        !           156: 
        !           157: /* number of bits in an addressable storage unit */
        !           158: #define BITS_PER_UNIT 8
        !           159: 
        !           160: /* Width in bits of a "word", which is the contents of a machine register.
        !           161:    Note that this is not necessarily the width of data type `int';
        !           162:    if using 16-bit ints on a 68000, this would still be 32.
        !           163:    But on a machine with 16-bit registers, this would be 16.  */
        !           164: #define BITS_PER_WORD 32
        !           165: 
        !           166: /* Width of a word, in units (bytes).  */
        !           167: #define UNITS_PER_WORD 4
        !           168: 
        !           169: /* Width in bits of a pointer.
        !           170:    See also the macro `Pmode' defined below.  */
        !           171: #define POINTER_SIZE 32
        !           172: 
        !           173: /* Allocation boundary (in *bits*) for storing arguments in argument list.  */
        !           174: #define PARM_BOUNDARY 32
        !           175: 
        !           176: /* Boundary (in *bits*) on which stack pointer should be aligned.  */
        !           177: #define STACK_BOUNDARY 64
        !           178: 
        !           179: /* Allocation boundary (in *bits*) for the code of a function.  */
        !           180: #define FUNCTION_BOUNDARY 32
        !           181: 
        !           182: /* Alignment of field after `int : 0' in a structure.  */
        !           183: #define EMPTY_FIELD_BOUNDARY 32
        !           184: 
        !           185: /* Every structure's size must be a multiple of this.  */
        !           186: #define STRUCTURE_SIZE_BOUNDARY 8
        !           187: 
        !           188: /* A bitfield declared as `int' forces `int' alignment for the struct.  */
        !           189: #define PCC_BITFIELD_TYPE_MATTERS 1
        !           190: 
        !           191: /* No data type wants to be aligned rounder than this.  */
        !           192: #define BIGGEST_ALIGNMENT 32
        !           193: 
        !           194: /* Make strings word-aligned so strcpy from constants will be faster.  */
        !           195: #define CONSTANT_ALIGNMENT(EXP, ALIGN)  \
        !           196:   (TREE_CODE (EXP) == STRING_CST       \
        !           197:    && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
        !           198: 
        !           199: /* Make arrays of chars word-aligned for the same reasons.  */
        !           200: #define DATA_ALIGNMENT(TYPE, ALIGN)            \
        !           201:   (TREE_CODE (TYPE) == ARRAY_TYPE              \
        !           202:    && TYPE_MODE (TREE_TYPE (TYPE)) == QImode   \
        !           203:    && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
        !           204: 
        !           205: /* Set this non-zero if move instructions will actually fail to work
        !           206:    when given unaligned data.  */
        !           207: #define STRICT_ALIGNMENT 0
        !           208: 
        !           209: /* Set this non-zero if unaligned move instructions are extremely slow.
        !           210: 
        !           211:    On the 29k, they trap.  */
        !           212: #define SLOW_UNALIGNED_ACCESS 1
        !           213: 
        !           214: /* Standard register usage.  */
        !           215: 
        !           216: /* Number of actual hardware registers.
        !           217:    The hardware registers are assigned numbers for the compiler
        !           218:    from 0 to just below FIRST_PSEUDO_REGISTER.
        !           219:    All registers that the compiler knows about must be given numbers,
        !           220:    even those that are not normally considered general registers.
        !           221: 
        !           222:    29k has 256 registers, of which 62 are not defined.  gr0 and gr1 are
        !           223:    not produced in generated RTL so we can start at gr96, and call it
        !           224:    register zero.
        !           225: 
        !           226:    So 0-31 are gr96-gr127, lr0-lr127 are 32-159.  To represent the input
        !           227:    arguments, whose register numbers we won't know until we are done,
        !           228:    use register 160-175.  They cannot be modified.  Similarly, 176 is used
        !           229:    for the frame pointer.  It is assigned the last local register number
        !           230:    once the number of registers used is known.
        !           231: 
        !           232:    We use 177, 178, 179, and 180 for the special registers BP, FC, CR, and Q,
        !           233:    respectively.  Registers 181 through 199 are used for the other special
        !           234:    registers that may be used by the programmer, but are never used by the
        !           235:    compiler.
        !           236: 
        !           237:    Registers 200-203 are the four floating-point accumulator register in
        !           238:    the 29050.
        !           239: 
        !           240:    When -mkernel-registers is specified, we still use the same register
        !           241:    map but change the names so 0-31 print as gr64-gr95.  */
        !           242: 
        !           243: #define FIRST_PSEUDO_REGISTER 204
        !           244: 
        !           245: /* Because of the large number of registers on the 29k, we define macros
        !           246:    to refer to each group of registers and then define the number for some
        !           247:    registers used in the calling sequence.  */
        !           248: 
        !           249: #define R_GR(N)                ((N) - 96)      /* gr96 is register number 0 */
        !           250: #define R_LR(N)                ((N) + 32)      /* lr0 is register number 32 */
        !           251: #define R_FP           176             /* frame pointer is register 176 */
        !           252: #define R_AR(N)                ((N) + 160)     /* first incoming arg reg is 160 */
        !           253: 
        !           254: /* Define the numbers of the special registers.  */
        !           255: #define R_BP   177
        !           256: #define R_FC   178
        !           257: #define R_CR   179
        !           258: #define R_Q    180
        !           259: 
        !           260: /* These special registers are not used by the compiler, but may be referenced
        !           261:    by the programmer via asm declarations.  */
        !           262: 
        !           263: #define R_VAB  181
        !           264: #define R_OPS  182
        !           265: #define R_CPS  183
        !           266: #define R_CFG  184
        !           267: #define R_CHA  185
        !           268: #define R_CHD  186
        !           269: #define R_CHC  187
        !           270: #define R_RBP  188
        !           271: #define R_TMC  189
        !           272: #define R_TMR  190
        !           273: #define R_PC0  191
        !           274: #define R_PC1  192
        !           275: #define R_PC2  193
        !           276: #define R_MMU  194
        !           277: #define R_LRU  195
        !           278: #define R_FPE  196
        !           279: #define R_INT  197
        !           280: #define R_FPS  198
        !           281: #define R_EXO  199
        !           282: 
        !           283: /* Define the number for floating-point accumulator N.  */
        !           284: #define R_ACC(N)       ((N) + 200)
        !           285: 
        !           286: /* Now define the registers used in the calling sequence.  */
        !           287: #define R_TAV  R_GR (121)
        !           288: #define R_TPC  R_GR (122)
        !           289: #define R_LRP  R_GR (123)
        !           290: #define R_SLP  R_GR (124)
        !           291: #define R_MSP  R_GR (125)
        !           292: #define R_RAB  R_GR (126)
        !           293: #define R_RFB  R_GR (127)
        !           294: 
        !           295: /* 1 for registers that have pervasive standard uses
        !           296:    and are not available for the register allocator.  */
        !           297: 
        !           298: #define FIXED_REGISTERS  \
        !           299:  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           300:   1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, \
        !           301:   0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           302:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           303:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           304:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           305:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           306:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           307:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           308:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           309:   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
        !           310:   1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
        !           311:   1, 1, 1, 1, 1, 1, 1, 1,                        \
        !           312:   0, 0, 0, 0 }
        !           313: 
        !           314: /* 1 for registers not available across function calls.
        !           315:    These must include the FIXED_REGISTERS and also any
        !           316:    registers that can be used without being saved.
        !           317:    The latter must include the registers where values are returned
        !           318:    and the register where structure-value addresses are passed.
        !           319:    Aside from that, you can include as many other registers as you like.  */
        !           320: #define CALL_USED_REGISTERS  \
        !           321:  {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
        !           322:   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
        !           323:   1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           324:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           325:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           326:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           327:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           328:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           329:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           330:   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
        !           331:   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
        !           332:   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
        !           333:   1, 1, 1, 1, 1, 1, 1, 1,                        \
        !           334:   1, 1, 1, 1 }
        !           335: 
        !           336: /* List the order in which to allocate registers.  Each register must be
        !           337:    listed once, even those in FIXED_REGISTERS.
        !           338: 
        !           339:    We allocate in the following order:
        !           340:        gr116-gr120     (not used for anything but temps)
        !           341:        gr96-gr111      (function return values, reverse order)
        !           342:        argument registers (160-175)
        !           343:        lr0-lr127       (locals, saved)
        !           344:         acc3-0         (acc0 special)
        !           345:        everything else  */
        !           346: 
        !           347: #define REG_ALLOC_ORDER                \
        !           348:   {R_GR (116), R_GR (117), R_GR (118), R_GR (119), R_GR (120),         \
        !           349:    R_GR (111), R_GR (110), R_GR (109), R_GR (108), R_GR (107),         \
        !           350:    R_GR (106), R_GR (105), R_GR (104), R_GR (103), R_GR (102),         \
        !           351:    R_GR (101), R_GR (100), R_GR (99), R_GR (98), R_GR (97), R_GR (96), \
        !           352:    R_AR (0), R_AR (1), R_AR (2), R_AR (3), R_AR (4), R_AR (5),         \
        !           353:    R_AR (6), R_AR (7), R_AR (8), R_AR (9), R_AR (10), R_AR (11),       \
        !           354:    R_AR (12), R_AR (13), R_AR (14), R_AR (15),                         \
        !           355:    R_LR (0), R_LR (1), R_LR (2), R_LR (3), R_LR (4), R_LR (5),         \
        !           356:    R_LR (6), R_LR (7), R_LR (8), R_LR (9), R_LR (10), R_LR (11),       \
        !           357:    R_LR (12), R_LR (13), R_LR (14), R_LR (15), R_LR (16), R_LR (17),   \
        !           358:    R_LR (18), R_LR (19), R_LR (20), R_LR (21), R_LR (22), R_LR (23),   \
        !           359:    R_LR (24), R_LR (25), R_LR (26), R_LR (27), R_LR (28), R_LR (29),   \
        !           360:    R_LR (30), R_LR (31), R_LR (32), R_LR (33), R_LR (34), R_LR (35),   \
        !           361:    R_LR (36), R_LR (37), R_LR (38), R_LR (39), R_LR (40), R_LR (41),   \
        !           362:    R_LR (42), R_LR (43), R_LR (44), R_LR (45), R_LR (46), R_LR (47),   \
        !           363:    R_LR (48), R_LR (49), R_LR (50), R_LR (51), R_LR (52), R_LR (53),   \
        !           364:    R_LR (54), R_LR (55), R_LR (56), R_LR (57), R_LR (58), R_LR (59),   \
        !           365:    R_LR (60), R_LR (61), R_LR (62), R_LR (63), R_LR (64), R_LR (65),   \
        !           366:    R_LR (66), R_LR (67), R_LR (68), R_LR (69), R_LR (70), R_LR (71),   \
        !           367:    R_LR (72), R_LR (73), R_LR (74), R_LR (75), R_LR (76), R_LR (77),   \
        !           368:    R_LR (78), R_LR (79), R_LR (80), R_LR (81), R_LR (82), R_LR (83),   \
        !           369:    R_LR (84), R_LR (85), R_LR (86), R_LR (87), R_LR (88), R_LR (89),   \
        !           370:    R_LR (90), R_LR (91), R_LR (92), R_LR (93), R_LR (94), R_LR (95),   \
        !           371:    R_LR (96), R_LR (97), R_LR (98), R_LR (99), R_LR (100), R_LR (101), \
        !           372:    R_LR (102), R_LR (103), R_LR (104), R_LR (105), R_LR (106),         \
        !           373:    R_LR (107), R_LR (108), R_LR (109), R_LR (110), R_LR (111),         \
        !           374:    R_LR (112), R_LR (113), R_LR (114), R_LR (115), R_LR (116),         \
        !           375:    R_LR (117), R_LR (118), R_LR (119), R_LR (120), R_LR (121),         \
        !           376:    R_LR (122), R_LR (123), R_LR (124), R_LR (124), R_LR (126),         \
        !           377:    R_LR (127),                                                         \
        !           378:    R_ACC (3), R_ACC (2), R_ACC (1), R_ACC (0),                         \
        !           379:    R_GR (112), R_GR (113), R_GR (114), R_GR (115), R_GR (121),         \
        !           380:    R_GR (122), R_GR (123), R_GR (124), R_GR (125), R_GR (126),         \
        !           381:    R_GR (127),                                                         \
        !           382:    R_FP, R_BP, R_FC, R_CR, R_Q,                                                \
        !           383:    R_VAB, R_OPS, R_CPS, R_CFG, R_CHA, R_CHD, R_CHC, R_RBP, R_TMC,      \
        !           384:    R_TMR, R_PC0, R_PC1, R_PC2, R_MMU, R_LRU, R_FPE, R_INT, R_FPS,      \
        !           385:    R_EXO }
        !           386: 
        !           387: /* Return number of consecutive hard regs needed starting at reg REGNO
        !           388:    to hold something of mode MODE.
        !           389:    This is ordinarily the length in words of a value of mode MODE
        !           390:    but can be less for certain modes in special long registers.  */
        !           391: 
        !           392: #define HARD_REGNO_NREGS(REGNO, MODE)   \
        !           393:   ((REGNO) >= R_ACC (0) ? 1            \
        !           394:    : (GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
        !           395: 
        !           396: /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
        !           397:    On 29k, the cpu registers can hold any mode.  But a double-precision
        !           398:    floating-point value should start at an even register.  The special
        !           399:    registers cannot hold floating-point values, BP, CR, and FC cannot
        !           400:    hold integer or floating-point values,  and the accumulators cannot
        !           401:    hold integer values.
        !           402: 
        !           403:    DImode and larger values should start at an even register just like
        !           404:    DFmode values, even though the instruction set doesn't require it, in order
        !           405:    to prevent reload from aborting due to a modes_equiv_for_class_p failure.
        !           406: 
        !           407:    (I'd like to use the "?:" syntax to make this more readable, but Sun's
        !           408:    compiler doesn't seem to accept it.)  */
        !           409: #define HARD_REGNO_MODE_OK(REGNO, MODE)                                \
        !           410:   (((REGNO) >= R_ACC (0)                                               \
        !           411:     && (GET_MODE_CLASS (MODE) == MODE_FLOAT                            \
        !           412:        || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT))                \
        !           413:    || ((REGNO) >= R_BP && (REGNO) <= R_CR                              \
        !           414:        && GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT)                   \
        !           415:    || ((REGNO) >= R_Q && (REGNO) < R_ACC (0)                           \
        !           416:        && GET_MODE_CLASS (MODE) != MODE_FLOAT                          \
        !           417:        && GET_MODE_CLASS (MODE) != MODE_COMPLEX_FLOAT)                 \
        !           418:    || ((REGNO) < R_BP                                                  \
        !           419:        && ((((REGNO) & 1) == 0)                                                \
        !           420:           || GET_MODE_UNIT_SIZE (MODE) <= UNITS_PER_WORD)))
        !           421: 
        !           422: /* Value is 1 if it is a good idea to tie two pseudo registers
        !           423:    when one has mode MODE1 and one has mode MODE2.
        !           424:    If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
        !           425:    for any hard reg, then this must be 0 for correct output.
        !           426: 
        !           427:    On the 29k, normally we'd just have problems with DFmode because of the
        !           428:    even alignment.  However, we also have to be a bit concerned about
        !           429:    the special register's restriction to non-floating and the floating-point
        !           430:    accumulator's restriction to only floating.  This probably won't
        !           431:    cause any great inefficiencies in practice.  */
        !           432: 
        !           433: #define MODES_TIEABLE_P(MODE1, MODE2)                  \
        !           434:   ((MODE1) == (MODE2)                                  \
        !           435:    || (GET_MODE_CLASS (MODE1) == MODE_INT              \
        !           436:        && GET_MODE_CLASS (MODE2) == MODE_INT))
        !           437: 
        !           438: /* Specify the registers used for certain standard purposes.
        !           439:    The values of these macros are register numbers.  */
        !           440: 
        !           441: /* 29k pc isn't overloaded on a register that the compiler knows about.  */
        !           442: /* #define PC_REGNUM  */
        !           443: 
        !           444: /* Register to use for pushing function arguments.  */
        !           445: #define STACK_POINTER_REGNUM R_GR (125)
        !           446: 
        !           447: /* Base register for access to local variables of the function.  */
        !           448: #define FRAME_POINTER_REGNUM R_FP
        !           449: 
        !           450: /* Value should be nonzero if functions must have frame pointers.
        !           451:    Zero means the frame pointer need not be set up (and parms
        !           452:    may be accessed via the stack pointer) in functions that seem suitable.
        !           453:    This is computed in `reload', in reload1.c.  */
        !           454: #define FRAME_POINTER_REQUIRED 0
        !           455: 
        !           456: /* Base register for access to arguments of the function.  */
        !           457: #define ARG_POINTER_REGNUM R_FP
        !           458: 
        !           459: /* Register in which static-chain is passed to a function.  */
        !           460: #define STATIC_CHAIN_REGNUM R_SLP
        !           461: 
        !           462: /* Register in which address to store a structure value
        !           463:    is passed to a function.  */
        !           464: #define STRUCT_VALUE_REGNUM R_LRP
        !           465: 
        !           466: /* Define the classes of registers for register constraints in the
        !           467:    machine description.  Also define ranges of constants.
        !           468: 
        !           469:    One of the classes must always be named ALL_REGS and include all hard regs.
        !           470:    If there is more than one class, another class must be named NO_REGS
        !           471:    and contain no registers.
        !           472: 
        !           473:    The name GENERAL_REGS must be the name of a class (or an alias for
        !           474:    another name such as ALL_REGS).  This is the class of registers
        !           475:    that is allowed by "g" or "r" in a register constraint.
        !           476:    Also, registers outside this class are allocated only when
        !           477:    instructions express preferences for them.
        !           478: 
        !           479:    The classes must be numbered in nondecreasing order; that is,
        !           480:    a larger-numbered class must never be contained completely
        !           481:    in a smaller-numbered class.
        !           482: 
        !           483:    For any two classes, it is very desirable that there be another
        !           484:    class that represents their union.
        !           485:    
        !           486:    The 29k has nine registers classes: LR0_REGS, GENERAL_REGS, SPECIAL_REGS,
        !           487:    BP_REGS, FC_REGS, CR_REGS, Q_REGS, ACCUM_REGS, and ACCUM0_REGS.
        !           488:    LR0_REGS, BP_REGS, FC_REGS, CR_REGS, and Q_REGS contain just the single
        !           489:    register.  The latter two classes are used to represent the floating-point
        !           490:    accumulator registers in the 29050.  We also define the union class
        !           491:    FLOAT_REGS to represent any register that can be used to hold a
        !           492:    floating-point value.  The union of SPECIAL_REGS and ACCUM_REGS isn't
        !           493:    useful as the former cannot contain floating-point and the latter can only
        !           494:    contain floating-point.  */
        !           495: 
        !           496: enum reg_class { NO_REGS, LR0_REGS, GENERAL_REGS, BP_REGS, FC_REGS, CR_REGS,
        !           497:                 Q_REGS, SPECIAL_REGS, ACCUM0_REGS, ACCUM_REGS, FLOAT_REGS,
        !           498:                 ALL_REGS, LIM_REG_CLASSES };
        !           499: 
        !           500: #define N_REG_CLASSES (int) LIM_REG_CLASSES
        !           501: 
        !           502: /* Give names of register classes as strings for dump file.   */
        !           503: 
        !           504: #define REG_CLASS_NAMES                                \
        !           505:  {"NO_REGS", "LR0_REGS", "GENERAL_REGS", "BP_REGS", "FC_REGS", "CR_REGS", \
        !           506:   "Q_REGS", "SPECIAL_REGS", "ACCUM0_REGS", "ACCUM_REGS", "FLOAT_REGS",    \
        !           507:   "ALL_REGS" }
        !           508: 
        !           509: /* Define which registers fit in which classes.
        !           510:    This is an initializer for a vector of HARD_REG_SET
        !           511:    of length N_REG_CLASSES.  */
        !           512: 
        !           513: #define REG_CLASS_CONTENTS     \
        !           514:   { {0, 0, 0, 0, 0, 0, 0},     \
        !           515:     {0, 1, 0, 0, 0, 0, 0},     \
        !           516:     {~0, ~0, ~0, ~0, ~0, ~ 0xfffe0000, 0},  \
        !           517:     {0, 0, 0, 0, 0, 0x20000, 0},       \
        !           518:     {0, 0, 0, 0, 0, 0x40000, 0},       \
        !           519:     {0, 0, 0, 0, 0, 0x80000, 0},       \
        !           520:     {0, 0, 0, 0, 0, 0x100000, 0},      \
        !           521:     {0, 0, 0, 0, 0, 0xfffe0000, 0xff}, \
        !           522:     {0, 0, 0, 0, 0, 0, 0x100},         \
        !           523:     {0, 0, 0, 0, 0, 0, 0xf00},         \
        !           524:     {~0, ~0, ~0, ~0, ~0, ~ 0xfffe0000, 0xf00}, \
        !           525:     {~0, ~0, ~0, ~0, ~0, ~0, ~0} }
        !           526: 
        !           527: /* The same information, inverted:
        !           528:    Return the class number of the smallest class containing
        !           529:    reg number REGNO.  This could be a conditional expression
        !           530:    or could index an array.  */
        !           531: 
        !           532: #define REGNO_REG_CLASS(REGNO)         \
        !           533:   ((REGNO) == R_BP ? BP_REGS           \
        !           534:    : (REGNO) == R_FC ? FC_REGS         \
        !           535:    : (REGNO) == R_CR ? CR_REGS         \
        !           536:    : (REGNO) == R_Q ? Q_REGS           \
        !           537:    : (REGNO) > R_BP && (REGNO) <= R_EXO ? SPECIAL_REGS \
        !           538:    : (REGNO) == R_ACC (0) ? ACCUM0_REGS        \
        !           539:    : (REGNO) > R_ACC (0) ? ACCUM_REGS  \
        !           540:    : (REGNO) == R_LR (0) ? LR0_REGS    \
        !           541:    : GENERAL_REGS)
        !           542: 
        !           543: /* The class value for index registers, and the one for base regs.  */
        !           544: #define INDEX_REG_CLASS NO_REGS
        !           545: #define BASE_REG_CLASS GENERAL_REGS
        !           546: 
        !           547: /* Get reg_class from a letter such as appears in the machine description.  */
        !           548: 
        !           549: #define REG_CLASS_FROM_LETTER(C)       \
        !           550:  ((C) == 'r' ? GENERAL_REGS            \
        !           551:   : (C) == 'l' ? LR0_REGS              \
        !           552:   : (C) == 'b' ? BP_REGS               \
        !           553:   : (C) == 'f' ? FC_REGS               \
        !           554:   : (C) == 'c' ? CR_REGS               \
        !           555:   : (C) == 'q' ? Q_REGS                        \
        !           556:   : (C) == 'h' ? SPECIAL_REGS          \
        !           557:   : (C) == 'a' ? ACCUM_REGS            \
        !           558:   : (C) == 'A' ? ACCUM0_REGS           \
        !           559:   : (C) == 'f' ? FLOAT_REGS            \
        !           560:   : NO_REGS)
        !           561: 
        !           562: /* Define this macro to change register usage conditional on target flags.
        !           563: 
        !           564:    On the 29k, we use this to change the register names for kernel mapping.  */
        !           565: 
        !           566: #define CONDITIONAL_REGISTER_USAGE                                     \
        !           567:   {                                                                    \
        !           568:     static char *kernel_names[] = {"gr64", "gr65", "gr66", "gr67",     \
        !           569:                                   "gr68", "gr69", "gr70", "gr71",      \
        !           570:                                   "gr72", "gr73", "gr74", "gr75",      \
        !           571:                                   "gr76", "gr77", "gr78", "gr79",      \
        !           572:                                   "gr80", "gr81", "gr82", "gr83",      \
        !           573:                                   "gr84", "gr85", "gr86", "gr87",      \
        !           574:                                   "gr88", "gr89", "gr90", "gr91",      \
        !           575:                                   "gr92", "gr93", "gr94", "gr95"};     \
        !           576:     int i;                                                             \
        !           577:                                                                        \
        !           578:     if (TARGET_KERNEL_REGISTERS)                                       \
        !           579:       for (i = 0; i < 32; i++)                                         \
        !           580:        reg_names[i] = kernel_names[i];                                 \
        !           581:   }
        !           582: 
        !           583: /* The letters I, J, K, L, M, N, O, and P in a register constraint string
        !           584:    can be used to stand for particular ranges of immediate operands.
        !           585:    This macro defines what the ranges are.
        !           586:    C is the letter, and VALUE is a constant value.
        !           587:    Return 1 if VALUE is in the range specified by C.
        !           588: 
        !           589:    For 29k:
        !           590:    `I' is used for the range of constants most insns can contain.
        !           591:    `J' is for the few 16-bit insns.
        !           592:    `K' is a constant whose high-order 24 bits are all one
        !           593:    `L' is a HImode constant whose high-order 8 bits are all one
        !           594:    `M' is a 32-bit constant whose high-order 16 bits are all one (for CONSTN)
        !           595:    `N' is a 32-bit constant whose negative is 8 bits
        !           596:    `O' is the 32-bit constant 0x80000000, any constant with low-order
        !           597:           16 bits zero for 29050.
        !           598:    `P' is a HImode constant whose negative is 8 bits  */
        !           599: 
        !           600: #define CONST_OK_FOR_LETTER_P(VALUE, C)                                \
        !           601:   ((C) == 'I' ? (unsigned) (VALUE) < 0x100                     \
        !           602:    : (C) == 'J' ? (unsigned) (VALUE) < 0x10000                 \
        !           603:    : (C) == 'K' ? ((VALUE) & 0xffffff00) == 0xffffff00         \
        !           604:    : (C) == 'L' ? ((VALUE) & 0xff00) == 0xff00                 \
        !           605:    : (C) == 'M' ? ((VALUE) & 0xffff0000) == 0xffff0000         \
        !           606:    : (C) == 'N' ? ((VALUE) < 0 && (VALUE) > -256)              \
        !           607:    : (C) == 'O' ? ((VALUE) == 0x80000000                       \
        !           608:                   || (TARGET_29050 && ((VALUE) & 0xffff) == 0)) \
        !           609:    : (C) == 'P' ? (((VALUE) | 0xffff0000) < 0                  \
        !           610:                   && ((VALUE) | 0xffff0000) > -256)            \
        !           611:    : 0)
        !           612: 
        !           613: /* Similar, but for floating constants, and defining letters G and H.
        !           614:    Here VALUE is the CONST_DOUBLE rtx itself.
        !           615:    All floating-point constants are valid on 29k.  */
        !           616: 
        !           617: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)  1
        !           618: 
        !           619: /* Given an rtx X being reloaded into a reg required to be
        !           620:    in class CLASS, return the class of reg to actually use.
        !           621:    In general this is just CLASS; but on some machines
        !           622:    in some cases it is preferable to use a more restrictive class.  */
        !           623: 
        !           624: #define PREFERRED_RELOAD_CLASS(X,CLASS)        CLASS
        !           625: 
        !           626: /* Return the register class of a scratch register needed to copy IN into
        !           627:    or out of a register in CLASS in MODE.  If it can be done directly,
        !           628:    NO_REGS is returned.  */
        !           629: 
        !           630: #define SECONDARY_RELOAD_CLASS(CLASS,MODE,IN) \
        !           631:   secondary_reload_class (CLASS, MODE, IN)
        !           632: 
        !           633: /* This function is used to get the address of an object.  */
        !           634: 
        !           635: extern struct rtx_def *a29k_get_reloaded_address ();
        !           636: 
        !           637: /* Return the maximum number of consecutive registers
        !           638:    needed to represent mode MODE in a register of class CLASS.
        !           639: 
        !           640:    On 29k, this is the size of MODE in words except that the floating-point
        !           641:    accumulators only require one word for anything they can hold.  */
        !           642: 
        !           643: #define CLASS_MAX_NREGS(CLASS, MODE)                           \
        !           644:  (((CLASS) == ACCUM_REGS || (CLASS) == ACCUM0_REGS) ? 1                \
        !           645:   : (GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
        !           646: 
        !           647: /* Define the cost of moving between registers of various classes.  Everything
        !           648:    involving a general register is cheap, but moving between the other types
        !           649:    (even within a class) is two insns.  */
        !           650: 
        !           651: #define REGISTER_MOVE_COST(CLASS1, CLASS2)     \
        !           652:   ((CLASS1) == GENERAL_REGS || (CLASS2) == GENERAL_REGS ? 2 : 4)
        !           653: 
        !           654: /* A C statement (sans semicolon) to update the integer variable COST
        !           655:    based on the relationship between INSN that is dependent on
        !           656:    DEP_INSN through the dependence LINK.  The default is to make no
        !           657:    adjustment to COST.  On the a29k, ignore the cost of anti- and
        !           658:    output-dependencies.  */
        !           659: #define ADJUST_COST(INSN,LINK,DEP_INSN,COST)                           \
        !           660:   if (REG_NOTE_KIND (LINK) != 0)                                       \
        !           661:     (COST) = 0; /* Anti or output dependence.  */
        !           662: 
        !           663: /* Stack layout; function entry, exit and calling.  */
        !           664: 
        !           665: /* Define this if pushing a word on the stack
        !           666:    makes the stack pointer a smaller address.  */
        !           667: #define STACK_GROWS_DOWNWARD
        !           668: 
        !           669: /* Define this if the nominal address of the stack frame
        !           670:    is at the high-address end of the local variables;
        !           671:    that is, each additional local variable allocated
        !           672:    goes at a more negative offset in the frame.  */
        !           673: #define FRAME_GROWS_DOWNWARD
        !           674: 
        !           675: /* Offset within stack frame to start allocating local variables at.
        !           676:    If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
        !           677:    first local allocated.  Otherwise, it is the offset to the BEGINNING
        !           678:    of the first local allocated.  */
        !           679: 
        !           680: #define STARTING_FRAME_OFFSET (- current_function_pretend_args_size)
        !           681: 
        !           682: /* If we generate an insn to push BYTES bytes,
        !           683:    this says how many the stack pointer really advances by.
        !           684:    On 29k, don't define this because there are no push insns.  */
        !           685: /*  #define PUSH_ROUNDING(BYTES) */
        !           686: 
        !           687: /* Define this if the maximum size of all the outgoing args is to be
        !           688:    accumulated and pushed during the prologue.  The amount can be
        !           689:    found in the variable current_function_outgoing_args_size.  */
        !           690: #define ACCUMULATE_OUTGOING_ARGS
        !           691: 
        !           692: /* Offset of first parameter from the argument pointer register value.  */
        !           693: 
        !           694: #define FIRST_PARM_OFFSET(FNDECL) (- current_function_pretend_args_size)
        !           695: 
        !           696: /* Define this if stack space is still allocated for a parameter passed
        !           697:    in a register.  */
        !           698: /* #define REG_PARM_STACK_SPACE */
        !           699: 
        !           700: /* Value is the number of bytes of arguments automatically
        !           701:    popped when returning from a subroutine call.
        !           702:    FUNTYPE is the data type of the function (as a tree),
        !           703:    or for a library call it is an identifier node for the subroutine name.
        !           704:    SIZE is the number of bytes of arguments passed on the stack.  */
        !           705: 
        !           706: #define RETURN_POPS_ARGS(FUNTYPE,SIZE) 0
        !           707: 
        !           708: /* Define how to find the value returned by a function.
        !           709:    VALTYPE is the data type of the value (as a tree).
        !           710:    If the precise function being called is known, FUNC is its FUNCTION_DECL;
        !           711:    otherwise, FUNC is 0.
        !           712: 
        !           713:    On 29k the value is found in gr96.  */
        !           714: 
        !           715: #define FUNCTION_VALUE(VALTYPE, FUNC)  \
        !           716:   gen_rtx (REG, TYPE_MODE (VALTYPE), R_GR (96))
        !           717: 
        !           718: /* Define how to find the value returned by a library function
        !           719:    assuming the value has mode MODE.  */
        !           720: 
        !           721: #define LIBCALL_VALUE(MODE)  gen_rtx (REG, MODE, R_GR (96))
        !           722: 
        !           723: /* 1 if N is a possible register number for a function value
        !           724:    as seen by the caller.
        !           725:    On 29k, gr96-gr111 are used.  */
        !           726: 
        !           727: #define FUNCTION_VALUE_REGNO_P(N) ((N) == R_GR (96))
        !           728: 
        !           729: /* 1 if N is a possible register number for function argument passing.
        !           730:    On 29k, these are lr2-lr17.  */
        !           731: 
        !           732: #define FUNCTION_ARG_REGNO_P(N) ((N) <= R_LR (17) && (N) >= R_LR (2))
        !           733: 
        !           734: /* Define a data type for recording info about an argument list
        !           735:    during the scan of that argument list.  This data type should
        !           736:    hold all necessary information about the function itself
        !           737:    and about the args processed so far, enough to enable macros
        !           738:    such as FUNCTION_ARG to determine where the next arg should go.
        !           739: 
        !           740:    On 29k, this is a single integer, which is a number of words
        !           741:    of arguments scanned so far.
        !           742:    Thus 16 or more means all following args should go on the stack.  */
        !           743: 
        !           744: #define CUMULATIVE_ARGS int
        !           745: 
        !           746: /* Initialize a variable CUM of type CUMULATIVE_ARGS
        !           747:    for a call to a function whose data type is FNTYPE.
        !           748:    For a library call, FNTYPE is 0.  */
        !           749: 
        !           750: #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME)  (CUM) = 0
        !           751: 
        !           752: /* Same, but called for incoming args.
        !           753: 
        !           754:    On the 29k, we use this to set all argument registers to fixed and
        !           755:    set the last 16 local regs (lr112-lr127) to available.  Some
        !           756:    will later be changed to call-saved by FUNCTION_INCOMING_ARG.  */
        !           757: 
        !           758: #define INIT_CUMULATIVE_INCOMING_ARGS(CUM,FNTYPE,IGNORE)               \
        !           759: { int i;                                                       \
        !           760:   for (i = R_AR (0); i < R_AR (16); i++)                       \
        !           761:     {                                                          \
        !           762:       fixed_regs[i] = call_used_regs[i] = call_fixed_regs[i] = 1; \
        !           763:       SET_HARD_REG_BIT (fixed_reg_set, i);                     \
        !           764:       SET_HARD_REG_BIT (call_used_reg_set, i);                 \
        !           765:       SET_HARD_REG_BIT (call_fixed_reg_set, i);                        \
        !           766:     }                                                          \
        !           767:   for (i = R_LR (112); i < R_LR (128); i++)                                    \
        !           768:     {                                                          \
        !           769:       fixed_regs[i] = call_used_regs[i] = call_fixed_regs[i] = 0; \
        !           770:       CLEAR_HARD_REG_BIT (fixed_reg_set, i);                   \
        !           771:       CLEAR_HARD_REG_BIT (call_used_reg_set, i);               \
        !           772:       CLEAR_HARD_REG_BIT (call_fixed_reg_set, i);              \
        !           773:     }                                                          \
        !           774:   (CUM) = 0;                                                   \
        !           775:  }
        !           776: 
        !           777: /* Define intermediate macro to compute the size (in registers) of an argument
        !           778:    for the 29k.  */
        !           779: 
        !           780: #define A29K_ARG_SIZE(MODE, TYPE, NAMED)                               \
        !           781: (! (NAMED) ? 0                                                         \
        !           782:  : (MODE) != BLKmode                                                   \
        !           783:  ? (GET_MODE_SIZE (MODE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD      \
        !           784:  : (int_size_in_bytes (TYPE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD)
        !           785: 
        !           786: /* Update the data in CUM to advance over an argument
        !           787:    of mode MODE and data type TYPE.
        !           788:    (TYPE is null for libcalls where that information may not be available.)  */
        !           789: 
        !           790: #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)                   \
        !           791:   if (MUST_PASS_IN_STACK (MODE, TYPE))                                 \
        !           792:     (CUM) = 16;                                                                \
        !           793:   else                                                                 \
        !           794:     (CUM) += A29K_ARG_SIZE (MODE, TYPE, NAMED)
        !           795: 
        !           796: /* Determine where to put an argument to a function.
        !           797:    Value is zero to push the argument on the stack,
        !           798:    or a hard register in which to store the argument.
        !           799: 
        !           800:    MODE is the argument's machine mode.
        !           801:    TYPE is the data type of the argument (as a tree).
        !           802:     This is null for libcalls where that information may
        !           803:     not be available.
        !           804:    CUM is a variable of type CUMULATIVE_ARGS which gives info about
        !           805:     the preceding args and about the function being called.
        !           806:    NAMED is nonzero if this argument is a named parameter
        !           807:     (otherwise it is an extra parameter matching an ellipsis).
        !           808: 
        !           809:    On 29k the first 16 words of args are normally in registers
        !           810:    and the rest are pushed.  */
        !           811: 
        !           812: #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED)                   \
        !           813: ((CUM) < 16 && (NAMED) && ! MUST_PASS_IN_STACK (MODE, TYPE)    \
        !           814:  ? gen_rtx(REG, (MODE), R_LR (2) + (CUM)) : 0)
        !           815: 
        !           816: /* Define where a function finds its arguments.
        !           817:    This is different from FUNCTION_ARG because of register windows.
        !           818: 
        !           819:    On the 29k, we hack this to call a function that sets the used registers
        !           820:    as non-fixed and not used by calls.  */
        !           821: 
        !           822: #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED)                  \
        !           823: ((CUM) < 16 && (NAMED) && ! MUST_PASS_IN_STACK (MODE, TYPE)            \
        !           824:  ? gen_rtx (REG, MODE,                                                 \
        !           825:            incoming_reg (CUM, A29K_ARG_SIZE (MODE, TYPE, NAMED)))      \
        !           826:  : 0)
        !           827: 
        !           828: /* This indicates that an argument is to be passed with an invisible reference
        !           829:    (i.e., a pointer to the object is passed).
        !           830: 
        !           831:    On the 29k, we do this if it must be passed on the stack.  */
        !           832: 
        !           833: #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
        !           834:   (MUST_PASS_IN_STACK (MODE, TYPE))
        !           835: 
        !           836: /* Specify the padding direction of arguments.
        !           837: 
        !           838:    On the 29k, we must pad upwards in order to be able to pass args in
        !           839:    registers.  */
        !           840: 
        !           841: #define FUNCTION_ARG_PADDING(MODE, TYPE)       upward
        !           842: 
        !           843: /* For an arg passed partly in registers and partly in memory,
        !           844:    this is the number of registers used.
        !           845:    For args passed entirely in registers or entirely in memory, zero.  */
        !           846: 
        !           847: #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED)             \
        !           848: ((CUM) < 16 && 16 < (CUM) + A29K_ARG_SIZE (MODE, TYPE, NAMED) && (NAMED) \
        !           849:  ? 16 - (CUM) : 0)
        !           850: 
        !           851: /* Perform any needed actions needed for a function that is receiving a
        !           852:    variable number of arguments. 
        !           853: 
        !           854:    CUM is as above.
        !           855: 
        !           856:    MODE and TYPE are the mode and type of the current parameter.
        !           857: 
        !           858:    PRETEND_SIZE is a variable that should be set to the amount of stack
        !           859:    that must be pushed by the prolog to pretend that our caller pushed
        !           860:    it.
        !           861: 
        !           862:    Normally, this macro will push all remaining incoming registers on the
        !           863:    stack and set PRETEND_SIZE to the length of the registers pushed.  */
        !           864: 
        !           865: #define SETUP_INCOMING_VARARGS(CUM,MODE,TYPE,PRETEND_SIZE,NO_RTL) \
        !           866: { if ((CUM) < 16)                                                      \
        !           867:     {                                                                  \
        !           868:       int first_reg_offset = (CUM);                                    \
        !           869:                                                                        \
        !           870:       if (MUST_PASS_IN_STACK (MODE, TYPE))                             \
        !           871:        first_reg_offset += A29K_ARG_SIZE (TYPE_MODE (TYPE), TYPE, 1);  \
        !           872:                                                                        \
        !           873:       if (first_reg_offset > 16)                                       \
        !           874:        first_reg_offset = 16;                                          \
        !           875:                                                                        \
        !           876:       if (! (NO_RTL) && first_reg_offset != 16)                                \
        !           877:        move_block_from_reg                                             \
        !           878:          (R_AR (0) + first_reg_offset,                                 \
        !           879:           gen_rtx (MEM, BLKmode, virtual_incoming_args_rtx),           \
        !           880:           16 - first_reg_offset);                                      \
        !           881:       PRETEND_SIZE = (16 - first_reg_offset) * UNITS_PER_WORD;         \
        !           882:     }                                                                  \
        !           883: }
        !           884: 
        !           885: /* Define the information needed to generate branch and scc insns.  This is
        !           886:    stored from the compare operation.  Note that we can't use "rtx" here
        !           887:    since it hasn't been defined!  */
        !           888: 
        !           889: extern struct rtx_def *a29k_compare_op0, *a29k_compare_op1;
        !           890: extern int a29k_compare_fp_p;
        !           891: 
        !           892: /* This macro produces the initial definition of a function name.
        !           893: 
        !           894:    For the 29k, we need the prolog to contain one or two words prior to
        !           895:    the declaration of the function name.  So just store away the name and
        !           896:    write it as part of the prolog.  */
        !           897: 
        !           898: extern char *a29k_function_name;
        !           899: 
        !           900: #define ASM_DECLARE_FUNCTION_NAME(FILE,NAME,DECL)      \
        !           901:   a29k_function_name = NAME;
        !           902: 
        !           903: /* This macro generates the assembly code for function entry.
        !           904:    FILE is a stdio stream to output the code to.
        !           905:    SIZE is an int: how many units of temporary storage to allocate.
        !           906:    Refer to the array `regs_ever_live' to determine which registers
        !           907:    to save; `regs_ever_live[I]' is nonzero if register number I
        !           908:    is ever used in the function.  This macro is responsible for
        !           909:    knowing which registers should not be saved even if used.  */
        !           910: 
        !           911: #define FUNCTION_PROLOGUE(FILE, SIZE)  output_prolog (FILE, SIZE)
        !           912: 
        !           913: /* Output assembler code to FILE to increment profiler label # LABELNO
        !           914:    for profiling a function entry.  */
        !           915: 
        !           916: #define FUNCTION_PROFILER(FILE, LABELNO)
        !           917: 
        !           918: /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
        !           919:    the stack pointer does not matter.  The value is tested only in
        !           920:    functions that have frame pointers.
        !           921:    No definition is equivalent to always zero.  */
        !           922: 
        !           923: #define EXIT_IGNORE_STACK 1
        !           924: 
        !           925: /* This macro generates the assembly code for function exit,
        !           926:    on machines that need it.  If FUNCTION_EPILOGUE is not defined
        !           927:    then individual return instructions are generated for each
        !           928:    return statement.  Args are same as for FUNCTION_PROLOGUE.
        !           929: 
        !           930:    The function epilogue should not depend on the current stack pointer!
        !           931:    It should use the frame pointer only.  This is mandatory because
        !           932:    of alloca; we also take advantage of it to omit stack adjustments
        !           933:    before returning.  */
        !           934: 
        !           935: #define FUNCTION_EPILOGUE(FILE, SIZE)  output_epilog (FILE, SIZE)
        !           936: 
        !           937: /* Define the number of delay slots needed for the function epilogue.
        !           938: 
        !           939:    On the 29k, we need a slot except when we have a register stack adjustment,
        !           940:    have a memory stack adjustment, and have no frame pointer.  */
        !           941: 
        !           942: #define DELAY_SLOTS_FOR_EPILOGUE                                       \
        !           943:   (! (needs_regstack_p ()                                              \
        !           944:       && (get_frame_size () + current_function_pretend_args_size       \
        !           945:           + current_function_outgoing_args_size) != 0                  \
        !           946:       && ! frame_pointer_needed))
        !           947: 
        !           948: /* Define whether INSN can be placed in delay slot N for the epilogue.
        !           949: 
        !           950:    On the 29k, we must be able to place it in a delay slot, it must
        !           951:    not use sp if the frame pointer cannot be eliminated, and it cannot
        !           952:    use local regs if we need to push the register stack.  */
        !           953: 
        !           954: #define ELIGIBLE_FOR_EPILOGUE_DELAY(INSN,N)                            \
        !           955:   (get_attr_in_delay_slot (INSN) == IN_DELAY_SLOT_YES                  \
        !           956:    && ! (frame_pointer_needed                                          \
        !           957:         && reg_mentioned_p (stack_pointer_rtx, PATTERN (INSN)))        \
        !           958:    && ! (needs_regstack_p () && uses_local_reg_p (PATTERN (INSN))))
        !           959: 
        !           960: /* Output assembler code for a block containing the constant parts
        !           961:    of a trampoline, leaving space for the variable parts.
        !           962: 
        !           963:    The trampoline should set the static chain pointer to value placed
        !           964:    into the trampoline and should branch to the specified routine.  We
        !           965:    use gr121 (tav) as a temporary.  */
        !           966: 
        !           967: #define TRAMPOLINE_TEMPLATE(FILE)                      \
        !           968: {                                                      \
        !           969:   fprintf (FILE, "\tconst %s,0\n", reg_names[R_TAV]);  \
        !           970:   fprintf (FILE, "\tconsth %s,0\n", reg_names[R_TAV]); \
        !           971:   fprintf (FILE, "\tconst %s,0\n", reg_names[R_SLP]);  \
        !           972:   fprintf (FILE, "\tjmpi %s\n", reg_names[R_TAV]);     \
        !           973:   fprintf (FILE, "\tconsth %s,0\n", reg_names[R_SLP]); \
        !           974: }
        !           975: 
        !           976: /* Length in units of the trampoline for entering a nested function.  */
        !           977: 
        !           978: #define TRAMPOLINE_SIZE    20
        !           979: 
        !           980: /* Emit RTL insns to initialize the variable parts of a trampoline.
        !           981:    FNADDR is an RTX for the address of the function's pure code.
        !           982:    CXT is an RTX for the static chain value for the function.
        !           983: 
        !           984:    We do this on the 29k by writing the bytes of the addresses into the
        !           985:    trampoline one byte at a time.  */
        !           986: 
        !           987: #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)                      \
        !           988: {                                                                      \
        !           989:   INITIALIZE_TRAMPOLINE_VALUE (TRAMP, FNADDR, 0, 4);                   \
        !           990:   INITIALIZE_TRAMPOLINE_VALUE (TRAMP, CXT, 8, 16);                     \
        !           991: }
        !           992: 
        !           993: /* Define a sub-macro to initialize one value into the trampoline.
        !           994:    We specify the offsets of the CONST and CONSTH instructions, respectively
        !           995:    and copy the value a byte at a time into these instructions.  */
        !           996: 
        !           997: #define INITIALIZE_TRAMPOLINE_VALUE(TRAMP, VALUE, CONST, CONSTH)       \
        !           998: {                                                                      \
        !           999:   rtx _addr, _temp;                                                    \
        !          1000:   rtx _val = force_reg (SImode, VALUE);                                        \
        !          1001:                                                                        \
        !          1002:   _addr = memory_address (QImode, plus_constant (TRAMP, (CONST) + 3)); \
        !          1003:   emit_move_insn (gen_rtx (MEM, QImode, _addr),                                \
        !          1004:                  gen_lowpart (QImode, _val));                          \
        !          1005:                                                                        \
        !          1006:   _temp = expand_shift (RSHIFT_EXPR, SImode, _val,                     \
        !          1007:                       build_int_2 (8, 0), 0, 1);                       \
        !          1008:   _addr = memory_address (QImode, plus_constant (TRAMP, (CONST) + 1)); \
        !          1009:   emit_move_insn (gen_rtx (MEM, QImode, _addr),                                \
        !          1010:                  gen_lowpart (QImode, _temp));                         \
        !          1011:                                                                        \
        !          1012:   _temp = expand_shift (RSHIFT_EXPR, SImode, _temp,                    \
        !          1013:                       build_int_2 (8, 0), _temp, 1);                   \
        !          1014:   _addr = memory_address (QImode, plus_constant (TRAMP, (CONSTH) + 3));        \
        !          1015:   emit_move_insn (gen_rtx (MEM, QImode, _addr),                                \
        !          1016:                  gen_lowpart (QImode, _temp));                         \
        !          1017:                                                                        \
        !          1018:   _temp = expand_shift (RSHIFT_EXPR, SImode, _temp,                    \
        !          1019:                       build_int_2 (8, 0), _temp, 1);                   \
        !          1020:   _addr = memory_address (QImode, plus_constant (TRAMP, (CONSTH) + 1));        \
        !          1021:   emit_move_insn (gen_rtx (MEM, QImode, _addr),                                \
        !          1022:                  gen_lowpart (QImode, _temp));                         \
        !          1023: }
        !          1024: 
        !          1025: /* Addressing modes, and classification of registers for them.  */
        !          1026: 
        !          1027: /* #define HAVE_POST_INCREMENT */
        !          1028: /* #define HAVE_POST_DECREMENT */
        !          1029: 
        !          1030: /* #define HAVE_PRE_DECREMENT */
        !          1031: /* #define HAVE_PRE_INCREMENT */
        !          1032: 
        !          1033: /* Macros to check register numbers against specific register classes.  */
        !          1034: 
        !          1035: /* These assume that REGNO is a hard or pseudo reg number.
        !          1036:    They give nonzero only if REGNO is a hard reg of the suitable class
        !          1037:    or a pseudo reg currently allocated to a suitable hard reg.
        !          1038:    Since they use reg_renumber, they are safe only once reg_renumber
        !          1039:    has been allocated, which happens in local-alloc.c.  */
        !          1040: 
        !          1041: #define REGNO_OK_FOR_INDEX_P(REGNO) 0
        !          1042: #define REGNO_OK_FOR_BASE_P(REGNO) 1
        !          1043: 
        !          1044: /* Given the value returned from get_frame_size, compute the actual size
        !          1045:    of the frame we will allocate.   We include the pretend and outgoing
        !          1046:    arg sizes and round to a doubleword.  */
        !          1047: 
        !          1048: #define ACTUAL_FRAME_SIZE(SIZE)                                \
        !          1049:   (((SIZE) + current_function_pretend_args_size                \
        !          1050:     + current_function_outgoing_args_size + 7) & ~7)
        !          1051: 
        !          1052: /* Define the initial offset between the frame and stack pointer.  */
        !          1053: 
        !          1054: #define INITIAL_FRAME_POINTER_OFFSET(DEPTH)    \
        !          1055:   (DEPTH) = ACTUAL_FRAME_SIZE (get_frame_size ())
        !          1056: 
        !          1057: /* Maximum number of registers that can appear in a valid memory address.  */
        !          1058: #define MAX_REGS_PER_ADDRESS 1
        !          1059: 
        !          1060: /* Recognize any constant value that is a valid address.
        !          1061: 
        !          1062:    None are on the 29K.  */
        !          1063: #define CONSTANT_ADDRESS_P(X)  0
        !          1064: 
        !          1065: /* Include all constant integers and constant doubles */
        !          1066: #define LEGITIMATE_CONSTANT_P(X)       1
        !          1067: 
        !          1068: /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
        !          1069:    and check its validity for a certain class.
        !          1070:    We have two alternate definitions for each of them.
        !          1071:    The usual definition accepts all pseudo regs; the other rejects
        !          1072:    them unless they have been allocated suitable hard regs.
        !          1073:    The symbol REG_OK_STRICT causes the latter definition to be used.
        !          1074: 
        !          1075:    Most source files want to accept pseudo regs in the hope that
        !          1076:    they will get allocated to the class that the insn wants them to be in.
        !          1077:    Source files for reload pass need to be strict.
        !          1078:    After reload, it makes no difference, since pseudo regs have
        !          1079:    been eliminated by then.  */
        !          1080: 
        !          1081: #ifndef REG_OK_STRICT
        !          1082: 
        !          1083: /* Nonzero if X is a hard reg that can be used as an index
        !          1084:    or if it is a pseudo reg.  */
        !          1085: #define REG_OK_FOR_INDEX_P(X) 0
        !          1086: /* Nonzero if X is a hard reg that can be used as a base reg
        !          1087:    or if it is a pseudo reg.  */
        !          1088: #define REG_OK_FOR_BASE_P(X)  1
        !          1089: 
        !          1090: #else
        !          1091: 
        !          1092: /* Nonzero if X is a hard reg that can be used as an index.  */
        !          1093: #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
        !          1094: /* Nonzero if X is a hard reg that can be used as a base reg.  */
        !          1095: #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
        !          1096: 
        !          1097: #endif
        !          1098: 
        !          1099: /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
        !          1100:    that is a valid memory address for an instruction.
        !          1101:    The MODE argument is the machine mode for the MEM expression
        !          1102:    that wants to use this address.
        !          1103: 
        !          1104:    On the 29k, a legitimate address is a register and so is a
        !          1105:    constant of less than 256.  */
        !          1106: 
        !          1107: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR)  \
        !          1108: { if (REG_P (X) && REG_OK_FOR_BASE_P (X))      \
        !          1109:     goto ADDR;                                 \
        !          1110:   if (GET_CODE (X) == CONST_INT                        \
        !          1111:       && (unsigned) INTVAL (X) < 0x100)                \
        !          1112:     goto ADDR;                                 \
        !          1113: }
        !          1114: 
        !          1115: /* Try machine-dependent ways of modifying an illegitimate address
        !          1116:    to be legitimate.  If we find one, return the new, valid address.
        !          1117:    This macro is used in only one place: `memory_address' in explow.c.
        !          1118: 
        !          1119:    OLDX is the address as it was before break_out_memory_refs was called.
        !          1120:    In some cases it is useful to look at this to decide what needs to be done.
        !          1121: 
        !          1122:    MODE and WIN are passed so that this macro can use
        !          1123:    GO_IF_LEGITIMATE_ADDRESS.
        !          1124: 
        !          1125:    It is always safe for this macro to do nothing.  It exists to recognize
        !          1126:    opportunities to optimize the output.
        !          1127: 
        !          1128:    For the 29k, we need not do anything.  However, if we don't,
        !          1129:    `memory_address' will try lots of things to get a valid address, most of
        !          1130:    which will result in dead code and extra pseudos.  So we make the address
        !          1131:    valid here.
        !          1132: 
        !          1133:    This is easy:  The only valid addresses are an offset from a register
        !          1134:    and we know the address isn't valid.  So just call either `force_operand'
        !          1135:    or `force_reg' unless this is a (plus (reg ...) (const_int 0)).  */
        !          1136: 
        !          1137: #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN)                    \
        !          1138: { if (GET_CODE (X) == PLUS && XEXP (X, 1) == const0_rtx)       \
        !          1139:     X = XEXP (x, 0);                                           \
        !          1140:   if (GET_CODE (X) == MULT || GET_CODE (X) == PLUS)            \
        !          1141:     X = force_operand (X, 0);                                  \
        !          1142:   else                                                         \
        !          1143:     X = force_reg (Pmode, X);                                  \
        !          1144:   goto WIN;                                                    \
        !          1145: }
        !          1146: 
        !          1147: /* Go to LABEL if ADDR (a legitimate address expression)
        !          1148:    has an effect that depends on the machine mode it is used for.
        !          1149:    On the 29k this is never true.  */
        !          1150: 
        !          1151: #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)
        !          1152: 
        !          1153: /* Compute the cost of an address.  For the 29k, all valid addresses are
        !          1154:    the same cost.  */
        !          1155: 
        !          1156: #define ADDRESS_COST(X)  0
        !          1157: 
        !          1158: /* Define this if some processing needs to be done immediately before
        !          1159:    emitting code for an insn.  */
        !          1160: 
        !          1161: /* #define FINAL_PRESCAN_INSN(INSN,OPERANDS,NOPERANDS) */
        !          1162: 
        !          1163: /* Specify the machine mode that this machine uses
        !          1164:    for the index in the tablejump instruction.  */
        !          1165: #define CASE_VECTOR_MODE SImode
        !          1166: 
        !          1167: /* Define this if the tablejump instruction expects the table
        !          1168:    to contain offsets from the address of the table.
        !          1169:    Do not define this if the table should contain absolute addresses.  */
        !          1170: /* #define CASE_VECTOR_PC_RELATIVE */
        !          1171: 
        !          1172: /* Specify the tree operation to be used to convert reals to integers.  */
        !          1173: #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
        !          1174: 
        !          1175: /* This is the kind of divide that is easiest to do in the general case.  */
        !          1176: #define EASY_DIV_EXPR TRUNC_DIV_EXPR
        !          1177: 
        !          1178: /* Define this as 1 if `char' should by default be signed; else as 0.  */
        !          1179: #define DEFAULT_SIGNED_CHAR 0
        !          1180: 
        !          1181: /* This flag, if defined, says the same insns that convert to a signed fixnum
        !          1182:    also convert validly to an unsigned one.
        !          1183: 
        !          1184:    We actually lie a bit here as overflow conditions are different.  But
        !          1185:    they aren't being checked anyway.  */
        !          1186: 
        !          1187: #define FIXUNS_TRUNC_LIKE_FIX_TRUNC
        !          1188: 
        !          1189: /* Max number of bytes we can move to of from memory
        !          1190:    in one reasonably fast instruction.
        !          1191: 
        !          1192:    For the 29k, we will define movti, so put this at 4 words.  */
        !          1193: #define MOVE_MAX 16
        !          1194: 
        !          1195: /* Largest number of bytes of an object that can be placed in a register.
        !          1196:    On the 29k we have plenty of registers, so use TImode.  */
        !          1197: #define MAX_FIXED_MODE_SIZE    GET_MODE_BITSIZE (TImode)
        !          1198: 
        !          1199: /* Nonzero if access to memory by bytes is no faster than for words.
        !          1200:    Also non-zero if doing byte operations (specifically shifts) in registers
        !          1201:    is undesirable. 
        !          1202: 
        !          1203:    On the 29k, large masks are expensive, so we want to use bytes to
        !          1204:    manipulate fields.  */
        !          1205: #define SLOW_BYTE_ACCESS       0
        !          1206: 
        !          1207: /* Define if normal loads of shorter-than-word items from memory clears
        !          1208:    the rest of the bigs in the register.  */
        !          1209: #define BYTE_LOADS_ZERO_EXTEND
        !          1210: 
        !          1211: /* Define if the object format being used is COFF or a superset.  */
        !          1212: #define OBJECT_FORMAT_COFF
        !          1213: 
        !          1214: /* This uses COFF, so it wants SDB format.  */
        !          1215: #define SDB_DEBUGGING_INFO
        !          1216: 
        !          1217: /* Define this to be the delimiter between SDB sub-sections.  The default
        !          1218:    is ";".  */
        !          1219: #define SDB_DELIM      "\n"
        !          1220: 
        !          1221: /* Do not break .stabs pseudos into continuations.  */
        !          1222: #define DBX_CONTIN_LENGTH 0
        !          1223: 
        !          1224: /* Don't try to use the `x' type-cross-reference character in DBX data.
        !          1225:    Also has the consequence of putting each struct, union or enum
        !          1226:    into a separate .stabs, containing only cross-refs to the others.  */
        !          1227: #define DBX_NO_XREFS
        !          1228: 
        !          1229: /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
        !          1230:    is done just by pretending it is already truncated.  */
        !          1231: #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
        !          1232: 
        !          1233: /* We assume that the store-condition-codes instructions store 0 for false
        !          1234:    and some other value for true.  This is the value stored for true.  */
        !          1235: 
        !          1236: #define STORE_FLAG_VALUE 0x80000000
        !          1237: 
        !          1238: /* Specify the machine mode that pointers have.
        !          1239:    After generation of rtl, the compiler makes no further distinction
        !          1240:    between pointers and any other objects of this machine mode.  */
        !          1241: #define Pmode SImode
        !          1242: 
        !          1243: /* Mode of a function address in a call instruction (for indexing purposes).
        !          1244: 
        !          1245:    Doesn't matter on 29k.  */
        !          1246: #define FUNCTION_MODE SImode
        !          1247: 
        !          1248: /* Define this if addresses of constant functions
        !          1249:    shouldn't be put through pseudo regs where they can be cse'd.
        !          1250:    Desirable on machines where ordinary constants are expensive
        !          1251:    but a CALL with constant address is cheap.  */
        !          1252: #define NO_FUNCTION_CSE
        !          1253: 
        !          1254: /* Define this if shift instructions ignore all but the low-order
        !          1255:    few bits. */
        !          1256: #define SHIFT_COUNT_TRUNCATED
        !          1257: 
        !          1258: /* Compute the cost of computing a constant rtl expression RTX
        !          1259:    whose rtx-code is CODE.  The body of this macro is a portion
        !          1260:    of a switch statement.  If the code is computed here,
        !          1261:    return it with a return statement.  Otherwise, break from the switch.
        !          1262: 
        !          1263:    We only care about the cost if it is valid in an insn.  The only
        !          1264:    constants that cause an insn to generate more than one machine
        !          1265:    instruction are those involving floating-point or address.  So 
        !          1266:    only these need be expensive.  */
        !          1267: 
        !          1268: #define CONST_COSTS(RTX,CODE,OUTER_CODE) \
        !          1269:   case CONST_INT:                                              \
        !          1270:     return 0;                                                  \
        !          1271:   case CONST:                                                  \
        !          1272:   case LABEL_REF:                                              \
        !          1273:   case SYMBOL_REF:                                             \
        !          1274:     return 6;                                                  \
        !          1275:   case CONST_DOUBLE:                                           \
        !          1276:     return GET_MODE (RTX) == SFmode ? 6 : 8;
        !          1277:     
        !          1278: /* Provide the costs of a rtl expression.  This is in the body of a
        !          1279:    switch on CODE.
        !          1280: 
        !          1281:    All MEMs cost the same if they are valid.  This is used to ensure
        !          1282:    that (mem (symbol_ref ...)) is placed into a CALL when valid.
        !          1283: 
        !          1284:    The multiply cost depends on whether this is a 29050 or not.  */
        !          1285: 
        !          1286: #define RTX_COSTS(X,CODE,OUTER_CODE)                   \
        !          1287:   case MULT:                                           \
        !          1288:     return TARGET_29050 ? COSTS_N_INSNS (2) : COSTS_N_INSNS (40);  \
        !          1289:   case DIV:                                            \
        !          1290:   case UDIV:                                           \
        !          1291:   case MOD:                                            \
        !          1292:   case UMOD:                                           \
        !          1293:     return COSTS_N_INSNS (50);                         \
        !          1294:   case MEM:                                            \
        !          1295:     return COSTS_N_INSNS (2);
        !          1296: 
        !          1297: /* Control the assembler format that we output.  */
        !          1298: 
        !          1299: /* Output at beginning of assembler file.  */
        !          1300: 
        !          1301: #define ASM_FILE_START(FILE)                                   \
        !          1302: { char *p, *after_dir = main_input_filename;                   \
        !          1303:   if (TARGET_29050)                                            \
        !          1304:     fprintf (FILE, "\t.cputype 29050\n");                      \
        !          1305:   for (p = main_input_filename; *p; p++)                       \
        !          1306:     if (*p == '/')                                             \
        !          1307:       after_dir = p + 1;                                       \
        !          1308:   fprintf (FILE, "\t.file \"%s\"\n", after_dir);               \
        !          1309:   fprintf (FILE, "\t.sect .lit,lit\n"); }
        !          1310: 
        !          1311: /* Output to assembler file text saying following lines
        !          1312:    may contain character constants, extra white space, comments, etc.  */
        !          1313: 
        !          1314: #define ASM_APP_ON ""
        !          1315: 
        !          1316: /* Output to assembler file text saying following lines
        !          1317:    no longer contain unusual constructs.  */
        !          1318: 
        !          1319: #define ASM_APP_OFF ""
        !          1320: 
        !          1321: /* The next few macros don't have tabs on most machines, but
        !          1322:    at least one 29K assembler wants them.  */
        !          1323: 
        !          1324: /* Output before instructions.  */
        !          1325: 
        !          1326: #define TEXT_SECTION_ASM_OP "\t.text"
        !          1327: 
        !          1328: /* Output before read-only data.  */
        !          1329: 
        !          1330: #define READONLY_DATA_SECTION_ASM_OP "\t.use .lit"
        !          1331: 
        !          1332: /* Output before writable data.  */
        !          1333: 
        !          1334: #define DATA_SECTION_ASM_OP "\t.data"
        !          1335: 
        !          1336: /* Define an extra section for read-only data, a routine to enter it, and
        !          1337:    indicate that it is for read-only data.  */
        !          1338: 
        !          1339: #define EXTRA_SECTIONS readonly_data
        !          1340: 
        !          1341: #define EXTRA_SECTION_FUNCTIONS                                        \
        !          1342: void                                                           \
        !          1343: literal_section ()                                             \
        !          1344: {                                                              \
        !          1345:   if (in_section != readonly_data)                             \
        !          1346:     {                                                          \
        !          1347:       fprintf (asm_out_file, "%s\n", READONLY_DATA_SECTION_ASM_OP); \
        !          1348:       in_section = readonly_data;                              \
        !          1349:     }                                                          \
        !          1350: }                                                              \
        !          1351: 
        !          1352: #define READONLY_DATA_SECTION  literal_section
        !          1353: 
        !          1354: /* How to refer to registers in assembler output.
        !          1355:    This sequence is indexed by compiler's hard-register-number (see above).  */
        !          1356: 
        !          1357: #define REGISTER_NAMES \
        !          1358: {"gr96", "gr97", "gr98", "gr99", "gr100", "gr101", "gr102", "gr103", "gr104", \
        !          1359:  "gr105", "gr106", "gr107", "gr108", "gr109", "gr110", "gr111", "gr112", \
        !          1360:  "gr113", "gr114", "gr115", "gr116", "gr117", "gr118", "gr119", "gr120", \
        !          1361:  "gr121", "gr122", "gr123", "gr124", "gr125", "gr126", "gr127",                 \
        !          1362:  "lr0", "lr1", "lr2", "lr3", "lr4", "lr5", "lr6", "lr7", "lr8", "lr9",   \
        !          1363:  "lr10", "lr11", "lr12", "lr13", "lr14", "lr15", "lr16", "lr17", "lr18", \
        !          1364:  "lr19", "lr20", "lr21", "lr22", "lr23", "lr24", "lr25", "lr26", "lr27", \
        !          1365:  "lr28", "lr29", "lr30", "lr31", "lr32", "lr33", "lr34", "lr35", "lr36", \
        !          1366:  "lr37", "lr38", "lr39", "lr40", "lr41", "lr42", "lr43", "lr44", "lr45", \
        !          1367:  "lr46", "lr47", "lr48", "lr49", "lr50", "lr51", "lr52", "lr53", "lr54", \
        !          1368:  "lr55", "lr56", "lr57", "lr58", "lr59", "lr60", "lr61", "lr62", "lr63", \
        !          1369:  "lr64", "lr65", "lr66", "lr67", "lr68", "lr69", "lr70", "lr71", "lr72", \
        !          1370:  "lr73", "lr74", "lr75", "lr76", "lr77", "lr78", "lr79", "lr80", "lr81", \
        !          1371:  "lr82", "lr83", "lr84", "lr85", "lr86", "lr87", "lr88", "lr89", "lr90", \
        !          1372:  "lr91", "lr92", "lr93", "lr94", "lr95", "lr96", "lr97", "lr98", "lr99", \
        !          1373:  "lr100", "lr101", "lr102", "lr103", "lr104", "lr105", "lr106", "lr107", \
        !          1374:  "lr108", "lr109", "lr110", "lr111", "lr112", "lr113", "lr114", "lr115", \
        !          1375:  "lr116", "lr117", "lr118", "lr119", "lr120", "lr121", "lr122", "lr123", \
        !          1376:  "lr124", "lr125", "lr126", "lr127",                                    \
        !          1377:   "AI0", "AI1", "AI2", "AI3", "AI4", "AI5", "AI6", "AI7", "AI8", "AI9",  \
        !          1378:   "AI10", "AI11", "AI12", "AI13", "AI14", "AI15", "FP",                         \
        !          1379:   "bp", "fc", "cr", "q",                                                \
        !          1380:   "vab", "ops", "cps", "cfg", "cha", "chd", "chc", "rbp", "tmc", "tmr",         \
        !          1381:   "pc0", "pc1", "pc2", "mmu", "lru", "fpe", "int", "fps", "exo",        \
        !          1382:   "0", "1", "2", "3" }
        !          1383: 
        !          1384: /* How to renumber registers for dbx and gdb.  */
        !          1385: 
        !          1386: extern int a29k_debug_reg_map[];
        !          1387: #define DBX_REGISTER_NUMBER(REGNO) a29k_debug_reg_map[REGNO]
        !          1388: 
        !          1389: /* This is how to output the definition of a user-level label named NAME,
        !          1390:    such as the label on a static function or variable NAME.  */
        !          1391: 
        !          1392: #define ASM_OUTPUT_LABEL(FILE,NAME)    \
        !          1393:   do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
        !          1394: 
        !          1395: /* This is how to output a command to make the user-level label named NAME
        !          1396:    defined for reference from other files.  */
        !          1397: 
        !          1398: #define ASM_GLOBALIZE_LABEL(FILE,NAME) \
        !          1399:   do { fputs ("\t.global ", FILE); assemble_name (FILE, NAME); fputs ("\n", FILE);} while (0)
        !          1400: 
        !          1401: /* This is how to output a reference to a user-level label named NAME.
        !          1402:    `assemble_name' uses this.  */
        !          1403: 
        !          1404: #define ASM_OUTPUT_LABELREF(FILE,NAME) \
        !          1405:   fprintf (FILE, "_%s", NAME)
        !          1406: 
        !          1407: /* This is how to output an internal numbered label where
        !          1408:    PREFIX is the class of label and NUM is the number within the class.  */
        !          1409: 
        !          1410: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)     \
        !          1411:   fprintf (FILE, "%s%d:\n", PREFIX, NUM)
        !          1412: 
        !          1413: /* This is how to output a label for a jump table.  Arguments are the same as
        !          1414:    for ASM_OUTPUT_INTERNAL_LABEL, except the insn for the jump table is
        !          1415:    passed. */
        !          1416: 
        !          1417: #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN)       \
        !          1418: { ASM_OUTPUT_ALIGN (FILE, 2); ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); }
        !          1419: 
        !          1420: /* This is how to store into the string LABEL
        !          1421:    the symbol_ref name of an internal numbered label where
        !          1422:    PREFIX is the class of label and NUM is the number within the class.
        !          1423:    This is suitable for output with `assemble_name'.  */
        !          1424: 
        !          1425: #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)  \
        !          1426:   sprintf (LABEL, "*%s%d", PREFIX, NUM)
        !          1427: 
        !          1428: /* This is how to output an assembler line defining a `double' constant.  */
        !          1429: 
        !          1430: #define ASM_OUTPUT_DOUBLE(FILE,VALUE)          \
        !          1431:   fprintf (FILE, "\t.double %.20e\n", (VALUE))
        !          1432: 
        !          1433: /* This is how to output an assembler line defining a `float' constant.  */
        !          1434: 
        !          1435: #define ASM_OUTPUT_FLOAT(FILE,VALUE)           \
        !          1436:   fprintf (FILE, "\t.float %.20e\n", (VALUE))
        !          1437: 
        !          1438: /* This is how to output an assembler line defining an `int' constant.  */
        !          1439: 
        !          1440: #define ASM_OUTPUT_INT(FILE,VALUE)  \
        !          1441: ( fprintf (FILE, "\t.word "),                  \
        !          1442:   output_addr_const (FILE, (VALUE)),           \
        !          1443:   fprintf (FILE, "\n"))
        !          1444: 
        !          1445: /* Likewise for `char' and `short' constants.  */
        !          1446: 
        !          1447: #define ASM_OUTPUT_SHORT(FILE,VALUE)  \
        !          1448: ( fprintf (FILE, "\t.hword "),                 \
        !          1449:   output_addr_const (FILE, (VALUE)),           \
        !          1450:   fprintf (FILE, "\n"))
        !          1451: 
        !          1452: #define ASM_OUTPUT_CHAR(FILE,VALUE)  \
        !          1453: ( fprintf (FILE, "\t.byte "),                  \
        !          1454:   output_addr_const (FILE, (VALUE)),           \
        !          1455:   fprintf (FILE, "\n"))
        !          1456: 
        !          1457: /* This is how to output an insn to push a register on the stack.
        !          1458:    It need not be very fast code.  */
        !          1459: 
        !          1460: #define ASM_OUTPUT_REG_PUSH(FILE,REGNO)                                        \
        !          1461:   fprintf (FILE, "\tsub %s,%s,4\n\tstore 0,0,%s,%s\n",                 \
        !          1462:            reg_names[R_MSP], reg_names[R_MSP], reg_names[REGNO],       \
        !          1463:           reg_names[R_MSP]);
        !          1464: 
        !          1465: /* This is how to output an insn to pop a register from the stack.
        !          1466:    It need not be very fast code.  */
        !          1467: 
        !          1468: #define ASM_OUTPUT_REG_POP(FILE,REGNO)                                 \
        !          1469:   fprintf (FILE, "\tload 0,0,%s,%s\n\tadd %s,%s,4\n",                  \
        !          1470:            reg_names[REGNO], reg_names[R_MSP], reg_names[R_MSP],       \
        !          1471:           reg_names[R_MSP]);
        !          1472: 
        !          1473: /* This is how to output an assembler line for a numeric constant byte.  */
        !          1474: 
        !          1475: #define ASM_OUTPUT_BYTE(FILE,VALUE)  \
        !          1476:   fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
        !          1477: 
        !          1478: /* This is how to output an element of a case-vector that is absolute.  */
        !          1479: 
        !          1480: #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
        !          1481:   fprintf (FILE, "\t.word L%d\n", VALUE)
        !          1482: 
        !          1483: /* This is how to output an element of a case-vector that is relative.
        !          1484:    (29k does not use such vectors,
        !          1485:    but we must define this macro anyway.)  */
        !          1486: 
        !          1487: #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL)  abort ()
        !          1488: 
        !          1489: /* This is how to output an assembler line
        !          1490:    that says to advance the location counter
        !          1491:    to a multiple of 2**LOG bytes.  */
        !          1492: 
        !          1493: #define ASM_OUTPUT_ALIGN(FILE,LOG)     \
        !          1494:   if ((LOG) != 0)                      \
        !          1495:     fprintf (FILE, "\t.align %d\n", 1 << (LOG))
        !          1496: 
        !          1497: #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
        !          1498:   fprintf (FILE, "\t.block %d\n", (SIZE))
        !          1499: 
        !          1500: /* This says how to output an assembler line
        !          1501:    to define a global common symbol.  */
        !          1502: 
        !          1503: #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
        !          1504: ( fputs ("\t.comm ", (FILE)),                  \
        !          1505:   assemble_name ((FILE), (NAME)),              \
        !          1506:   fprintf ((FILE), ",%d\n", (SIZE)))
        !          1507: 
        !          1508: /* This says how to output an assembler line
        !          1509:    to define a local common symbol.  */
        !          1510: 
        !          1511: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE,ROUNDED)     \
        !          1512: ( fputs ("\t.lcomm ", (FILE)),                         \
        !          1513:   assemble_name ((FILE), (NAME)),                      \
        !          1514:   fprintf ((FILE), ",%d\n", (SIZE)))
        !          1515: 
        !          1516: /* Store in OUTPUT a string (made with alloca) containing
        !          1517:    an assembler-name for a local static variable named NAME.
        !          1518:    LABELNO is an integer which is different for each call.  */
        !          1519: 
        !          1520: #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
        !          1521: ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10),   \
        !          1522:   sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
        !          1523: 
        !          1524: /* Define the parentheses used to group arithmetic operations
        !          1525:    in assembler code.  */
        !          1526: 
        !          1527: #define ASM_OPEN_PAREN "("
        !          1528: #define ASM_CLOSE_PAREN ")"
        !          1529: 
        !          1530: /* Define results of standard character escape sequences.  */
        !          1531: #define TARGET_BELL 007
        !          1532: #define TARGET_BS 010
        !          1533: #define TARGET_TAB 011
        !          1534: #define TARGET_NEWLINE 012
        !          1535: #define TARGET_VT 013
        !          1536: #define TARGET_FF 014
        !          1537: #define TARGET_CR 015
        !          1538: 
        !          1539: /* Print operand X (an rtx) in assembler syntax to file FILE.
        !          1540:    CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
        !          1541:    For `%' followed by punctuation, CODE is the punctuation and X is null.  */
        !          1542: 
        !          1543: #define PRINT_OPERAND(FILE, X, CODE)  print_operand (FILE, X, CODE)
        !          1544: 
        !          1545: /* Determine which codes are valid without a following integer.  These must
        !          1546:    not be alphabetic.
        !          1547: 
        !          1548:    We support `#' which is null if a delay slot exists, otherwise
        !          1549:    "\n\tnop" and `*' which prints the register name for TPC (gr122).  */
        !          1550: 
        !          1551: #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '#' || (CODE) == '*')
        !          1552: 
        !          1553: /* Print a memory address as an operand to reference that memory location.  */
        !          1554: 
        !          1555: #define PRINT_OPERAND_ADDRESS(FILE, ADDR)  \
        !          1556: { register rtx addr = ADDR;                                    \
        !          1557:   if (!REG_P (addr)                                            \
        !          1558:       && ! (GET_CODE (addr) == CONST_INT                       \
        !          1559:            && INTVAL (addr) >= 0 && INTVAL (addr) < 256))      \
        !          1560:     abort ();                                                  \
        !          1561:   output_operand (addr, 0);                                    \
        !          1562: }
        !          1563: /* Define the codes that are matched by predicates in a29k.c.  */
        !          1564: 
        !          1565: #define PREDICATE_CODES \
        !          1566:   {"cint_8_operand", {CONST_INT}},                             \
        !          1567:   {"cint_16_operand", {CONST_INT}},                            \
        !          1568:   {"long_const_operand", {CONST_INT, CONST, CONST_DOUBLE,      \
        !          1569:                          LABEL_REF, SYMBOL_REF}},              \
        !          1570:   {"shift_constant_operand", {CONST_INT, ASHIFT}},             \
        !          1571:   {"const_0__operand", {CONST_INT, ASHIFT}},                   \
        !          1572:   {"const_8__operand", {CONST_INT, ASHIFT}},                   \
        !          1573:   {"const_16__operand", {CONST_INT, ASHIFT}},                  \
        !          1574:   {"const_24__operand", {CONST_INT, ASHIFT}},                  \
        !          1575:   {"float_const_operand", {CONST_DOUBLE}},                     \
        !          1576:   {"gpc_reg_operand", {SUBREG, REG}},                          \
        !          1577:   {"gpc_reg_or_float_constant_operand", {SUBREG, REG, CONST_DOUBLE}}, \
        !          1578:   {"gpc_reg_or_integer_constant_operand", {SUBREG, REG,                \
        !          1579:                                           CONST_INT, CONST_DOUBLE}}, \
        !          1580:   {"spec_reg_operand", {REG}},                                 \
        !          1581:   {"accum_reg_operand", {REG}},                                        \
        !          1582:   {"srcb_operand", {SUBREG, REG, CONST_INT}},                  \
        !          1583:   {"reg_or_immediate_operand", {SUBREG, REG, CONST_INT, CONST, \
        !          1584:                                CONST_DOUBLE, CONST, SYMBOL_REF, LABEL_REF}}, \
        !          1585:   {"reg_or_u_short_operand", {SUBREG, REG, CONST_INT}},                \
        !          1586:   {"and_operand", {SUBREG, REG, CONST_INT}},                   \
        !          1587:   {"add_operand", {SUBREG, REG, CONST_INT}},                   \
        !          1588:   {"call_operand", {SYMBOL_REF, CONST_INT}},                   \
        !          1589:   {"in_operand", {SUBREG, MEM, REG, CONST_INT, CONST, SYMBOL_REF, \
        !          1590:                  LABEL_REF, CONST_DOUBLE}},                    \
        !          1591:   {"out_operand", {SUBREG, REG, MEM}},                         \
        !          1592:   {"reload_memory_operand", {SUBREG, REG, MEM}},               \
        !          1593:   {"fp_comparison_operator", {EQ, GT, GE}},                    \
        !          1594:   {"branch_operator", {GE, LT}},                               \
        !          1595:   {"epilogue_operand", {CODE_LABEL}},

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