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

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