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Annotation of gcc/config/i960/i960.h, revision 1.1

1.1     ! root        1: /* Definitions of target machine for GNU compiler, for Intel 80960
        !             2:    Copyright (C) 1992 Free Software Foundation, Inc.
        !             3:    Contributed by Steven McGeady, Intel Corp.
        !             4:    Additional Work by Glenn Colon-Bonet, Jonathan Shapiro, Andy Wilson
        !             5:    Converted to GCC 2.0 by Jim Wilson and Michael Tiemann, Cygnus Support.
        !             6: 
        !             7: This file is part of GNU CC.
        !             8: 
        !             9: GNU CC is free software; you can redistribute it and/or modify
        !            10: it under the terms of the GNU General Public License as published by
        !            11: the Free Software Foundation; either version 2, or (at your option)
        !            12: any later version.
        !            13: 
        !            14: GNU CC is distributed in the hope that it will be useful,
        !            15: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            16: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            17: GNU General Public License for more details.
        !            18: 
        !            19: You should have received a copy of the GNU General Public License
        !            20: along with GNU CC; see the file COPYING.  If not, write to
        !            21: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            22: 
        !            23: /* Note that some other tm.h files may include this one and then override
        !            24:    many of the definitions that relate to assembler syntax.  */
        !            25: 
        !            26: /* Names to predefine in the preprocessor for this target machine.  */
        !            27: #define CPP_PREDEFINES "-Di960 -Di80960 -DI960 -DI80960"
        !            28: 
        !            29: /* Name to predefine in the preprocessor for processor variations.  */
        !            30: #define        CPP_SPEC "%{mic*:-D__i960\
        !            31:                        %{mka:-D__i960KA}%{mkb:-D__i960KB}\
        !            32:                        %{msa:-D__i960SA}%{msb:-D__i960SB}\
        !            33:                        %{mmc:-D__i960MC}\
        !            34:                        %{mca:-D__i960CA}%{mcc:-D__i960CC}\
        !            35:                        %{mcf:-D__i960CF}}\
        !            36:        %{mka:-D__i960KA__ -D__i960_KA__}\
        !            37:        %{mkb:-D__i960KB__ -D__i960_KB__}\
        !            38:        %{msa:-D__i960SA__ -D__i960_SA__}\
        !            39:        %{msb:-D__i960SB__ -D__i960_SB__}\
        !            40:        %{mmc:-D__i960MC__ -D__i960_MC__}\
        !            41:        %{mca:-D__i960CA__ -D__i960_CA__}\
        !            42:        %{mcc:-D__i960CC__ -D__i960_CC__}\
        !            43:        %{mcf:-D__i960CF__ -D__i960_CF__}\
        !            44:        %{!mka:%{!mkb:%{!msa:%{!msb:%{!mmc:%{!mca:\
        !            45:                %{!mcc:%{!mcf:-D__i960_KB -D__i960KB__ %{mic*:-D__i960KB}}}}}}}}}"
        !            46: 
        !            47: /* -mic* options make characters signed by default.  */
        !            48: #define SIGNED_CHAR_SPEC  \
        !            49:   (DEFAULT_SIGNED_CHAR ? "%{funsigned-char:-D__CHAR_UNSIGNED__}"       \
        !            50:    : "%{!fsigned-char:%{!mic*:-D__CHAR_UNSIGNED__}}")
        !            51: 
        !            52: /* Specs for the compiler, to handle processor variations.  */
        !            53: #define CC1_SPEC \
        !            54:        "%{!mka:%{!mkb:%{!msa:%{!msb:%{!mmc:%{!mca:%{!mcc:%{!mcf:-mkb}}}}}}}}\
        !            55:        %{mbout:%{g*:-gstabs}}\
        !            56:        %{mcoff:%{g*:-gcoff}}\
        !            57:        %{!mbout:%{!mcoff:%{g*:-gstabs}}}"
        !            58: 
        !            59: /* Specs for the assembler, to handle processor variations.
        !            60:    For compatibility with Intel's gnu960 tool chain, pass -A options to
        !            61:    the assembler.  */
        !            62: #define ASM_SPEC \
        !            63:        "%{mka:-AKA}%{mkb:-AKB}%{msa:-ASA}%{msb:-ASB}\
        !            64:        %{mmc:-AMC}%{mca:-ACA}%{mcc:-ACC}%{mcf:-ACF}\
        !            65:        %{!mka:%{!mkb:%{!msa:%{!msb:%{!mmc:%{!mca:%{!mcc:%{!mcf:-AKB}}}}}}}}\
        !            66:        %{mlink-relax:-link-relax}"
        !            67: 
        !            68: /* Specs for the linker, to handle processor variations.
        !            69:    For compatibility with Intel's gnu960 tool chain, pass -F and -A options
        !            70:    to the linker.  */
        !            71: #define LINK_SPEC \
        !            72:        "%{mka:-AKA}%{mkb:-AKB}%{msa:-ASA}%{msb:-ASB}\
        !            73:        %{mmc:-AMC}%{mca:-ACA}%{mcc:-ACC}%{mcf:-ACF}\
        !            74:        %{!mka:%{!mkb:%{!msa:%{!msb:%{!mmc:%{!mca:%{!mcc:%{!mcf:-AKB}}}}}}}}\
        !            75:        %{mbout:-Fbout}%{mcoff:-Fcoff}\
        !            76:        %{mlink-relax:-relax}"
        !            77: 
        !            78: /* Specs for the libraries to link with, to handle processor variations.
        !            79:    Compatible with Intel's gnu960 tool chain.  */
        !            80: #define LIB_SPEC "%{!nostdlib:-lcg %{p:-lprof}%{pg:-lgprof}\
        !            81:          %{mka:-lfpg}%{msa:-lfpg}%{mca:-lfpg}%{mcf:-lfpg} -lgnu}"
        !            82: 
        !            83: /* Omit frame pointer at -O2.  Inline functions at -O3.  */
        !            84: #define OPTIMIZATION_OPTIONS(LEVEL)            \
        !            85: {                                              \
        !            86:   if ((LEVEL) >= 2)                            \
        !            87:     {                                          \
        !            88:       flag_omit_frame_pointer = 1;             \
        !            89:       target_flags |= TARGET_FLAG_LEAFPROC;    \
        !            90:       target_flags |= TARGET_FLAG_TAILCALL;    \
        !            91:     }                                          \
        !            92: }
        !            93: 
        !            94: /* Print subsidiary information on the compiler version in use.  */
        !            95: #define TARGET_VERSION fprintf (stderr," (intel 80960)");
        !            96: 
        !            97: /* Generate DBX debugging information.  */
        !            98: #define DBX_DEBUGGING_INFO
        !            99: 
        !           100: /* Generate SDB style debugging information.  */
        !           101: #define SDB_DEBUGGING_INFO
        !           102: 
        !           103: /* Generate DBX_DEBUGGING_INFO by default.  */
        !           104: #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
        !           105: 
        !           106: /* Redefine this to print in hex like iC960.  */
        !           107: #define PUT_SDB_TYPE(A) fprintf (asm_out_file, "\t.type\t0x%x;", A)
        !           108: 
        !           109: /* Run-time compilation parameters selecting different hardware subsets.  */
        !           110: 
        !           111: /* 960 architecture with floating-point.  */
        !           112: #define TARGET_FLAG_NUMERICS   0x01
        !           113: #define TARGET_NUMERICS                (target_flags & TARGET_FLAG_NUMERICS)
        !           114: 
        !           115: /* 960 architecture with memory management.  */
        !           116: /* ??? Not used currently.  */
        !           117: #define        TARGET_FLAG_PROTECTED   0x02
        !           118: #define        TARGET_PROTECTED        (target_flags & TARGET_FLAG_PROTECTED)
        !           119: 
        !           120: /* The following three are mainly used to provide a little sanity checking
        !           121:    against the -mARCH flags given.  */
        !           122: 
        !           123: /* Nonzero if we should generate code for the KA and similar processors.
        !           124:    No FPU, no microcode instructions.  */
        !           125: #define TARGET_FLAG_K_SERIES   0x04
        !           126: #define TARGET_K_SERIES                (target_flags & TARGET_FLAG_K_SERIES)
        !           127: 
        !           128: /* Nonzero if we should generate code for the MC processor.
        !           129:    Not really different from KB for our purposes.  */
        !           130: #define        TARGET_FLAG_MC          0x08
        !           131: #define TARGET_MC              (target_flags & TARGET_FLAG_MC)
        !           132: 
        !           133: /* Nonzero if we should generate code for the CA processor.
        !           134:    Enables different optimization strategies.  */
        !           135: #define        TARGET_FLAG_C_SERIES    0x10
        !           136: #define        TARGET_C_SERIES         (target_flags & TARGET_FLAG_C_SERIES)
        !           137: 
        !           138: /* Nonzero if we should generate leaf-procedures when we find them.
        !           139:    You may not want to do this because leaf-proc entries are
        !           140:    slower when not entered via BAL - this would be true when
        !           141:    a linker not supporting the optimization is used.  */
        !           142: #define        TARGET_FLAG_LEAFPROC    0x20
        !           143: #define        TARGET_LEAFPROC         (target_flags & TARGET_FLAG_LEAFPROC)
        !           144: 
        !           145: /* Nonzero if we should perform tail-call optimizations when we find them.
        !           146:    You may not want to do this because the detection of cases where
        !           147:    this is not valid is not totally complete.  */
        !           148: #define        TARGET_FLAG_TAILCALL    0x40
        !           149: #define        TARGET_TAILCALL         (target_flags & TARGET_FLAG_TAILCALL)
        !           150: 
        !           151: /* Nonzero if use of a complex addressing mode is a win on this implementation.
        !           152:    Complex addressing modes are probably not worthwhile on the K-series,
        !           153:    but they definitely are on the C-series.  */
        !           154: #define        TARGET_FLAG_COMPLEX_ADDR 0x80
        !           155: #define        TARGET_COMPLEX_ADDR     (target_flags & TARGET_FLAG_COMPLEX_ADDR)
        !           156: 
        !           157: /* Align code to 8 byte boundaries for faster fetching.  */
        !           158: #define        TARGET_FLAG_CODE_ALIGN  0x100
        !           159: #define        TARGET_CODE_ALIGN       (target_flags  & TARGET_FLAG_CODE_ALIGN)
        !           160: 
        !           161: /* Append branch prediction suffixes to branch opcodes.  */
        !           162: /* ??? Not used currently.  */
        !           163: #define        TARGET_FLAG_BRANCH_PREDICT 0x200
        !           164: #define        TARGET_BRANCH_PREDICT   (target_flags  & TARGET_FLAG_BRANCH_PREDICT)
        !           165: 
        !           166: /* Forces prototype and return promotions.  */
        !           167: /* ??? This does not work.  */
        !           168: #define        TARGET_FLAG_CLEAN_LINKAGE 0x400
        !           169: #define        TARGET_CLEAN_LINKAGE    (target_flags & TARGET_FLAG_CLEAN_LINKAGE)
        !           170: 
        !           171: /* For compatibility with iC960 v3.0.  */
        !           172: #define        TARGET_FLAG_IC_COMPAT3_0 0x800 
        !           173: #define        TARGET_IC_COMPAT3_0     (target_flags & TARGET_FLAG_IC_COMPAT3_0)
        !           174: 
        !           175: /* For compatibility with iC960 v2.0.  */
        !           176: #define        TARGET_FLAG_IC_COMPAT2_0 0x1000
        !           177: #define        TARGET_IC_COMPAT2_0     (target_flags & TARGET_FLAG_IC_COMPAT2_0)
        !           178: 
        !           179: /* If no unaligned accesses are to be permitted.  */
        !           180: #define        TARGET_FLAG_STRICT_ALIGN 0x2000
        !           181: #define        TARGET_STRICT_ALIGN     (target_flags & TARGET_FLAG_STRICT_ALIGN)
        !           182: 
        !           183: /* For compatibility with iC960 assembler.  */
        !           184: #define        TARGET_FLAG_ASM_COMPAT  0x4000
        !           185: #define        TARGET_ASM_COMPAT       (target_flags & TARGET_FLAG_ASM_COMPAT)
        !           186: 
        !           187: /* For compatibility with the gcc960 v1.2 compiler.  Use the old structure
        !           188:    alignment rules.  Also, turns on STRICT_ALIGNMENT.  */
        !           189: #define TARGET_FLAG_OLD_ALIGN  0x8000
        !           190: #define TARGET_OLD_ALIGN       (target_flags & TARGET_FLAG_OLD_ALIGN)
        !           191: 
        !           192: extern int target_flags;
        !           193: 
        !           194: /* Macro to define tables used to set the flags.
        !           195:    This is a list in braces of pairs in braces,
        !           196:    each pair being { "NAME", VALUE }
        !           197:    where VALUE is the bits to set or minus the bits to clear.
        !           198:    An empty string NAME is used to identify the default VALUE.  */
        !           199: 
        !           200: /* ??? Not all ten of these architecture variations actually exist, but I
        !           201:    am not sure which are real and which aren't.  */
        !           202: 
        !           203: #define TARGET_SWITCHES  \
        !           204:   { {"sa", (TARGET_FLAG_K_SERIES|TARGET_FLAG_COMPLEX_ADDR)},\
        !           205:     {"sb", (TARGET_FLAG_NUMERICS|TARGET_FLAG_K_SERIES| \
        !           206:                        TARGET_FLAG_COMPLEX_ADDR)},\
        !           207: /*  {"sc", (TARGET_FLAG_NUMERICS|TARGET_FLAG_PROTECTED|\
        !           208:                        TARGET_FLAG_MC|TARGET_FLAG_COMPLEX_ADDR)},*/ \
        !           209:     {"ka", (TARGET_FLAG_K_SERIES|TARGET_FLAG_COMPLEX_ADDR)},\
        !           210:     {"kb", (TARGET_FLAG_NUMERICS|TARGET_FLAG_K_SERIES| \
        !           211:                        TARGET_FLAG_COMPLEX_ADDR)},\
        !           212: /*  {"kc", (TARGET_FLAG_NUMERICS|TARGET_FLAG_PROTECTED|\
        !           213:                        TARGET_FLAG_MC|TARGET_FLAG_COMPLEX_ADDR)},*/ \
        !           214:     {"mc", (TARGET_FLAG_NUMERICS|TARGET_FLAG_PROTECTED|\
        !           215:                        TARGET_FLAG_MC|TARGET_FLAG_COMPLEX_ADDR)},\
        !           216:     {"ca", (TARGET_FLAG_C_SERIES|TARGET_FLAG_BRANCH_PREDICT|\
        !           217:                        TARGET_FLAG_CODE_ALIGN|TARGET_FLAG_COMPLEX_ADDR)},\
        !           218: /*  {"cb", (TARGET_FLAG_NUMERICS|TARGET_FLAG_C_SERIES|\
        !           219:                        TARGET_FLAG_BRANCH_PREDICT|TARGET_FLAG_CODE_ALIGN)},\
        !           220:     {"cc", (TARGET_FLAG_NUMERICS|TARGET_FLAG_PROTECTED|\
        !           221:                        TARGET_FLAG_C_SERIES|TARGET_FLAG_BRANCH_PREDICT|\
        !           222:                        TARGET_FLAG_CODE_ALIGN)}, */    \
        !           223:     {"cf", (TARGET_FLAG_C_SERIES|TARGET_FLAG_BRANCH_PREDICT|\
        !           224:                        TARGET_FLAG_CODE_ALIGN|TARGET_FLAG_COMPLEX_ADDR)},\
        !           225:     {"numerics", (TARGET_FLAG_NUMERICS)},              \
        !           226:     {"soft-float", -(TARGET_FLAG_NUMERICS)},           \
        !           227:     {"leaf-procedures", TARGET_FLAG_LEAFPROC},         \
        !           228:     {"no-leaf-procedures",-(TARGET_FLAG_LEAFPROC)},    \
        !           229:     {"tail-call",TARGET_FLAG_TAILCALL},                        \
        !           230:     {"no-tail-call",-(TARGET_FLAG_TAILCALL)},          \
        !           231:     {"complex-addr",TARGET_FLAG_COMPLEX_ADDR},         \
        !           232:     {"no-complex-addr",-(TARGET_FLAG_COMPLEX_ADDR)},   \
        !           233:     {"code-align",TARGET_FLAG_CODE_ALIGN},             \
        !           234:     {"no-code-align",-(TARGET_FLAG_CODE_ALIGN)},       \
        !           235:     {"clean-linkage", (TARGET_FLAG_CLEAN_LINKAGE)},    \
        !           236:     {"no-clean-linkage", -(TARGET_FLAG_CLEAN_LINKAGE)},        \
        !           237:     {"ic-compat", TARGET_FLAG_IC_COMPAT2_0},           \
        !           238:     {"ic2.0-compat", TARGET_FLAG_IC_COMPAT2_0},                \
        !           239:     {"ic3.0-compat", TARGET_FLAG_IC_COMPAT3_0},                \
        !           240:     {"asm-compat",TARGET_FLAG_ASM_COMPAT},             \
        !           241:     {"intel-asm",TARGET_FLAG_ASM_COMPAT},              \
        !           242:     {"strict-align", TARGET_FLAG_STRICT_ALIGN},                \
        !           243:     {"no-strict-align", -(TARGET_FLAG_STRICT_ALIGN)},  \
        !           244:     {"old-align", TARGET_FLAG_OLD_ALIGN},              \
        !           245:     {"no-old-align", -(TARGET_FLAG_OLD_ALIGN)},                \
        !           246:     {"link-relax", 0},                                 \
        !           247:     {"no-link-relax", 0},                              \
        !           248:     { "", TARGET_DEFAULT}}
        !           249: 
        !           250: /* Override conflicting target switch options.
        !           251:    Doesn't actually detect if more than one -mARCH option is given, but
        !           252:    does handle the case of two blatantly conflicting -mARCH options.  */
        !           253: #define OVERRIDE_OPTIONS                                       \
        !           254: {                                                              \
        !           255:   if (TARGET_K_SERIES && TARGET_C_SERIES)                      \
        !           256:     {                                                          \
        !           257:       warning ("conflicting architectures defined - using C series", 0); \
        !           258:       target_flags &= ~TARGET_FLAG_K_SERIES;                   \
        !           259:     }                                                          \
        !           260:   if (TARGET_K_SERIES && TARGET_MC)                            \
        !           261:     {                                                          \
        !           262:       warning ("conflicting architectures defined - using K series", 0); \
        !           263:       target_flags &= ~TARGET_FLAG_MC;                         \
        !           264:     }                                                          \
        !           265:   if (TARGET_C_SERIES && TARGET_MC)                            \
        !           266:     {                                                          \
        !           267:       warning ("conflicting architectures defined - using C series", 0);\
        !           268:       target_flags &= ~TARGET_FLAG_MC;                         \
        !           269:     }                                                          \
        !           270:   if (TARGET_IC_COMPAT3_0)                                     \
        !           271:     {                                                          \
        !           272:       flag_short_enums = 1;                                    \
        !           273:       flag_signed_char = 1;                                    \
        !           274:       target_flags |= TARGET_FLAG_CLEAN_LINKAGE;               \
        !           275:       if (TARGET_IC_COMPAT2_0)                                 \
        !           276:        {                                                       \
        !           277:          warning ("iC2.0 and iC3.0 are incompatible - using iC3.0", 0); \
        !           278:          target_flags &= ~TARGET_FLAG_IC_COMPAT2_0;            \
        !           279:        }                                                       \
        !           280:     }                                                          \
        !           281:   if (TARGET_IC_COMPAT2_0)                                     \
        !           282:     {                                                          \
        !           283:       flag_signed_char = 1;                                    \
        !           284:       target_flags |= TARGET_FLAG_CLEAN_LINKAGE;               \
        !           285:     }                                                          \
        !           286:   i960_initialize ();                                          \
        !           287: }
        !           288: 
        !           289: /* Don't enable anything by default.  The user is expected to supply a -mARCH
        !           290:    option.  If none is given, then -mkb is added by CC1_SPEC.  */
        !           291: #define TARGET_DEFAULT 0
        !           292: 
        !           293: /* Target machine storage layout.  */
        !           294: 
        !           295: /* Define this if most significant bit is lowest numbered
        !           296:    in instructions that operate on numbered bit-fields.  */
        !           297: #define BITS_BIG_ENDIAN 0
        !           298: 
        !           299: /* Define this if most significant byte of a word is the lowest numbered.
        !           300:    The i960 case be either big endian or little endian.  We only support
        !           301:    little endian, which is the most common.  */
        !           302: #define BYTES_BIG_ENDIAN 0
        !           303: 
        !           304: /* Define this if most significant word of a multiword number is lowest
        !           305:    numbered.  */
        !           306: #define WORDS_BIG_ENDIAN 0
        !           307: 
        !           308: /* Number of bits in an addressable storage unit.  */
        !           309: #define BITS_PER_UNIT 8
        !           310: 
        !           311: /* Bitfields cannot cross word boundaries.  */
        !           312: #define BITFIELD_NBYTES_LIMITED 1
        !           313: 
        !           314: /* Width in bits of a "word", which is the contents of a machine register.
        !           315:    Note that this is not necessarily the width of data type `int';
        !           316:    if using 16-bit ints on a 68000, this would still be 32.
        !           317:    But on a machine with 16-bit registers, this would be 16.  */
        !           318: #define BITS_PER_WORD 32
        !           319: 
        !           320: /* Width of a word, in units (bytes).  */
        !           321: #define UNITS_PER_WORD 4
        !           322: 
        !           323: /* Width in bits of a pointer.  See also the macro `Pmode' defined below.  */
        !           324: #define POINTER_SIZE 32
        !           325: 
        !           326: /* Width in bits of a long double.  Identical to double for now.  */
        !           327: #define        LONG_DOUBLE_TYPE_SIZE   64
        !           328: 
        !           329: /* Allocation boundary (in *bits*) for storing pointers in memory.  */
        !           330: #define POINTER_BOUNDARY 32
        !           331: 
        !           332: /* Allocation boundary (in *bits*) for storing arguments in argument list.  */
        !           333: #define PARM_BOUNDARY 32
        !           334: 
        !           335: /* Boundary (in *bits*) on which stack pointer should be aligned.  */
        !           336: #define STACK_BOUNDARY 128
        !           337: 
        !           338: /* Allocation boundary (in *bits*) for the code of a function.  */
        !           339: #define FUNCTION_BOUNDARY 128
        !           340: 
        !           341: /* Alignment of field after `int : 0' in a structure.  */
        !           342: #define EMPTY_FIELD_BOUNDARY 32
        !           343: 
        !           344: /* This makes zero-length anonymous fields lay the next field
        !           345:    at a word boundary.  It also makes the whole struct have
        !           346:    at least word alignment if there are any bitfields at all.  */
        !           347: #define PCC_BITFIELD_TYPE_MATTERS 1
        !           348: 
        !           349: /* Every structure's size must be a multiple of this.  */
        !           350: #define STRUCTURE_SIZE_BOUNDARY 8
        !           351: 
        !           352: /* No data type wants to be aligned rounder than this.
        !           353:    Extended precision floats gets 4-word alignment.  */
        !           354: #define BIGGEST_ALIGNMENT 128
        !           355: 
        !           356: /* Define this if move instructions will actually fail to work
        !           357:    when given unaligned data.
        !           358:    80960 will work even with unaligned data, but it is slow.  */
        !           359: #define STRICT_ALIGNMENT TARGET_OLD_ALIGN
        !           360: 
        !           361: /* Specify alignment for string literals (which might be higher than the
        !           362:    base type's minimal alignment requirement.  This allows strings to be
        !           363:    aligned on word boundaries, and optimizes calls to the str* and mem*
        !           364:    library functions.  */
        !           365: #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
        !           366:   (TREE_CODE (EXP) == STRING_CST       \
        !           367:    && i960_object_bytes_bitalign (int_size_in_bytes (TREE_TYPE (EXP))) > (ALIGN) \
        !           368:    ? i960_object_bytes_bitalign (int_size_in_bytes (TREE_TYPE (EXP)))      \
        !           369:    : (ALIGN))
        !           370: 
        !           371: /* Macros to determine size of aggregates (structures and unions
        !           372:    in C).  Normally, these may be defined to simply return the maximum
        !           373:    alignment and simple rounded-up size, but on some machines (like
        !           374:    the i960), the total size of a structure is based on a non-trivial
        !           375:    rounding method.  */
        !           376: 
        !           377: #define ROUND_TYPE_ALIGN(TYPE, COMPUTED, SPECIFIED)            \
        !           378:   ((!TARGET_OLD_ALIGN && TREE_CODE (TYPE) == RECORD_TYPE)      \
        !           379:    ? i960_round_align ((SPECIFIED), TYPE_SIZE (TYPE))          \
        !           380:    : MAX ((COMPUTED), (SPECIFIED)))
        !           381: 
        !           382: #define ROUND_TYPE_SIZE(TYPE, SIZE, ALIGN)                     \
        !           383:   ((!TARGET_OLD_ALIGN && TREE_CODE (TYPE) == RECORD_TYPE)      \
        !           384:    ? (tree) i960_round_size (SIZE)                             \
        !           385:    : round_up ((SIZE), (ALIGN)))
        !           386: 
        !           387: /* Standard register usage.  */
        !           388: 
        !           389: /* Number of actual hardware registers.
        !           390:    The hardware registers are assigned numbers for the compiler
        !           391:    from 0 to just below FIRST_PSEUDO_REGISTER.
        !           392:    All registers that the compiler knows about must be given numbers,
        !           393:    even those that are not normally considered general registers.
        !           394: 
        !           395:    Registers 0-15 are the global registers (g0-g15).
        !           396:    Registers 16-31 are the local registers (r0-r15).
        !           397:    Register 32-35 are the fp registers (fp0-fp3).
        !           398:    Register 36 is the condition code register.
        !           399:    Register 37 is unused.  */
        !           400: 
        !           401: #define FIRST_PSEUDO_REGISTER 38
        !           402: 
        !           403: /* 1 for registers that have pervasive standard uses and are not available
        !           404:    for the register allocator.  On 80960, this includes the frame pointer
        !           405:    (g15), the previous FP (r0), the stack pointer (r1), the return
        !           406:    instruction pointer (r2), and the argument pointer (g14).  */
        !           407: #define FIXED_REGISTERS  \
        !           408:  {0, 0, 0, 0, 0, 0, 0, 0,      \
        !           409:   0, 0, 0, 0, 0, 0, 1, 1,      \
        !           410:   1, 1, 1, 0, 0, 0, 0, 0,      \
        !           411:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           412:   0, 0, 0, 0, 1, 1}
        !           413: 
        !           414: /* 1 for registers not available across function calls.
        !           415:    These must include the FIXED_REGISTERS and also any
        !           416:    registers that can be used without being saved.
        !           417:    The latter must include the registers where values are returned
        !           418:    and the register where structure-value addresses are passed.
        !           419:    Aside from that, you can include as many other registers as you like.  */
        !           420: 
        !           421: /* On the 80960, note that:
        !           422:        g0..g3 are used for return values,
        !           423:        g0..g7 may always be used for parameters,
        !           424:        g8..g11 may be used for parameters, but are preserved if they aren't,
        !           425:        g12 is always preserved, but otherwise unused,
        !           426:        g13 is the struct return ptr if used, or temp, but may be trashed,
        !           427:        g14 is the leaf return ptr or the arg block ptr otherwise zero,
        !           428:                must be reset to zero before returning if it was used,
        !           429:        g15 is the frame pointer,
        !           430:        r0 is the previous FP,
        !           431:        r1 is the stack pointer,
        !           432:        r2 is the return instruction pointer,
        !           433:        r3-r15 are always available,
        !           434:        r3 is clobbered by calls in functions that use the arg pointer
        !           435:        r4-r11 may be clobbered by the mcount call when profiling
        !           436:        r4-r15 if otherwise unused may be used for preserving global registers
        !           437:        fp0..fp3 are never available.  */
        !           438: #define CALL_USED_REGISTERS  \
        !           439:  {1, 1, 1, 1, 1, 1, 1, 1,      \
        !           440:   0, 0, 0, 0, 0, 1, 1, 1,      \
        !           441:   1, 1, 1, 0, 0, 0, 0, 0,      \
        !           442:   0, 0, 0, 0, 0, 0, 0, 0,      \
        !           443:   1, 1, 1, 1, 1, 1}
        !           444: 
        !           445: /* If no fp unit, make all of the fp registers fixed so that they can't
        !           446:    be used.  */
        !           447: #define        CONDITIONAL_REGISTER_USAGE      \
        !           448:   if (! TARGET_NUMERICS) {                                             \
        !           449:      fixed_regs[32] = fixed_regs[33] = fixed_regs[34] = fixed_regs[35] = 1;\
        !           450:   }                                                                    \
        !           451: 
        !           452: /* Return number of consecutive hard regs needed starting at reg REGNO
        !           453:    to hold something of mode MODE.
        !           454:    This is ordinarily the length in words of a value of mode MODE
        !           455:    but can be less for certain modes in special long registers.
        !           456: 
        !           457:    On 80960, ordinary registers hold 32 bits worth, but can be ganged
        !           458:    together to hold double or extended precision floating point numbers,
        !           459:    and the floating point registers hold any size floating point number */
        !           460: #define HARD_REGNO_NREGS(REGNO, MODE)   \
        !           461:   ((REGNO) < 32                                                        \
        !           462:    ? (((MODE) == VOIDmode)                                     \
        !           463:       ? 1 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)) \
        !           464:    : ((REGNO) < FIRST_PSEUDO_REGISTER) ? 1 : 0)
        !           465: 
        !           466: /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
        !           467:    On 80960, the cpu registers can hold any mode but the float registers
        !           468:    can only hold SFmode, DFmode, or TFmode.  */
        !           469: extern unsigned int hard_regno_mode_ok[FIRST_PSEUDO_REGISTER];
        !           470: #define HARD_REGNO_MODE_OK(REGNO, MODE) \
        !           471:   ((hard_regno_mode_ok[REGNO] & (1 << (int) (MODE))) != 0)
        !           472: 
        !           473: /* Value is 1 if it is a good idea to tie two pseudo registers
        !           474:    when one has mode MODE1 and one has mode MODE2.
        !           475:    If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
        !           476:    for any hard reg, then this must be 0 for correct output.  */
        !           477: 
        !           478: #define MODES_TIEABLE_P(MODE1, MODE2) \
        !           479:   ((MODE1) == (MODE2) || GET_MODE_CLASS (MODE1) == GET_MODE_CLASS (MODE2))
        !           480: 
        !           481: /* Specify the registers used for certain standard purposes.
        !           482:    The values of these macros are register numbers.  */
        !           483: 
        !           484: /* 80960 pc isn't overloaded on a register that the compiler knows about.  */
        !           485: /* #define PC_REGNUM  */
        !           486: 
        !           487: /* Register to use for pushing function arguments.  */
        !           488: #define STACK_POINTER_REGNUM 17
        !           489: 
        !           490: /* Actual top-of-stack address is same as
        !           491:    the contents of the stack pointer register.  */
        !           492: #define STACK_POINTER_OFFSET (-current_function_outgoing_args_size)
        !           493: 
        !           494: /* Base register for access to local variables of the function.  */
        !           495: #define FRAME_POINTER_REGNUM 15
        !           496: 
        !           497: /* Value should be nonzero if functions must have frame pointers.
        !           498:    Zero means the frame pointer need not be set up (and parms
        !           499:    may be accessed via the stack pointer) in functions that seem suitable.
        !           500:    This is computed in `reload', in reload1.c.  */
        !           501: #define FRAME_POINTER_REQUIRED (! leaf_function_p ())
        !           502: 
        !           503: /* C statement to store the difference between the frame pointer
        !           504:    and the stack pointer values immediately after the function prologue.  */
        !           505: 
        !           506: #define INITIAL_FRAME_POINTER_OFFSET(VAR) \
        !           507:   do { (VAR) = compute_frame_size (get_frame_size ()); } while (0)
        !           508: 
        !           509: /* Base register for access to arguments of the function.  */
        !           510: #define ARG_POINTER_REGNUM 14
        !           511: 
        !           512: /* Register in which static-chain is passed to a function.
        !           513:    On i960, we use r3.  */
        !           514: #define STATIC_CHAIN_REGNUM 19
        !           515:  
        !           516: /* Functions which return large structures get the address
        !           517:    to place the wanted value at in g13.  */
        !           518: 
        !           519: #define STRUCT_VALUE_REGNUM 13 
        !           520: 
        !           521: /* The order in which to allocate registers.  */
        !           522: 
        !           523: #define        REG_ALLOC_ORDER \
        !           524: {  4, 5, 6, 7, 0, 1, 2, 3, 13,  /* g4, g5, g6, g7, g0, g1, g2, g3, g13  */ \
        !           525:   20, 21, 22, 23, 24, 25, 26, 27,/* r4, r5, r6, r7, r8, r9, r10, r11  */    \
        !           526:   28, 29, 30, 31, 19, 8, 9, 10,         /* r12, r13, r14, r15, r3, g8, g9, g10  */ \
        !           527:   11, 12,                       /* g11, g12  */                            \
        !           528:   32, 33, 34, 35,               /* fp0, fp1, fp2, fp3  */                  \
        !           529:   /* We can't actually allocate these.  */                                 \
        !           530:   16, 17, 18, 14, 15, 36, 37}   /* r0, r1, r2, g14, g15, cc  */
        !           531: 
        !           532: /* Define the classes of registers for register constraints in the
        !           533:    machine description.  Also define ranges of constants.
        !           534: 
        !           535:    One of the classes must always be named ALL_REGS and include all hard regs.
        !           536:    If there is more than one class, another class must be named NO_REGS
        !           537:    and contain no registers.
        !           538: 
        !           539:    The name GENERAL_REGS must be the name of a class (or an alias for
        !           540:    another name such as ALL_REGS).  This is the class of registers
        !           541:    that is allowed by "g" or "r" in a register constraint.
        !           542:    Also, registers outside this class are allocated only when
        !           543:    instructions express preferences for them.
        !           544: 
        !           545:    The classes must be numbered in nondecreasing order; that is,
        !           546:    a larger-numbered class must never be contained completely
        !           547:    in a smaller-numbered class.
        !           548: 
        !           549:    For any two classes, it is very desirable that there be another
        !           550:    class that represents their union.  */
        !           551:    
        !           552: /* The 80960 has four kinds of registers, global, local, floating point,
        !           553:    and condition code.  The cc register is never allocated, so no class
        !           554:    needs to be defined for it.  */
        !           555: 
        !           556: enum reg_class { NO_REGS, GLOBAL_REGS, LOCAL_REGS, LOCAL_OR_GLOBAL_REGS,
        !           557:   FP_REGS, ALL_REGS, LIM_REG_CLASSES };
        !           558: 
        !           559: /* 'r' includes floating point registers if TARGET_NUMERICS.  'd' never
        !           560:    does.  */
        !           561: #define        GENERAL_REGS    ((TARGET_NUMERICS) ? ALL_REGS : LOCAL_OR_GLOBAL_REGS)
        !           562: 
        !           563: #define N_REG_CLASSES (int) LIM_REG_CLASSES
        !           564: 
        !           565: /* Give names of register classes as strings for dump file.  */
        !           566: 
        !           567: #define REG_CLASS_NAMES                                                        \
        !           568: { "NO_REGS", "GLOBAL_REGS", "LOCAL_REGS", "LOCAL_OR_GLOBAL_REGS",      \
        !           569:   "FP_REGS", "ALL_REGS" }
        !           570: 
        !           571: /* Define which registers fit in which classes.
        !           572:    This is an initializer for a vector of HARD_REG_SET
        !           573:    of length N_REG_CLASSES.  */
        !           574: 
        !           575: #define REG_CLASS_CONTENTS     \
        !           576: { {0, 0}, {0x0ffff, 0}, {0xffff0000, 0}, {-1,0}, {0, -1}, {-1,-1}}
        !           577: 
        !           578: /* The same information, inverted:
        !           579:    Return the class number of the smallest class containing
        !           580:    reg number REGNO.  This could be a conditional expression
        !           581:    or could index an array.  */
        !           582: 
        !           583: #define REGNO_REG_CLASS(REGNO) \
        !           584:   ((REGNO) < 16 ? GLOBAL_REGS  \
        !           585:    : (REGNO) < 32 ? LOCAL_REGS \
        !           586:    : (REGNO) < 36 ? FP_REGS    \
        !           587:    : NO_REGS)
        !           588: 
        !           589: /* The class value for index registers, and the one for base regs.
        !           590:    There is currently no difference between base and index registers on the
        !           591:    i960, but this distinction may one day be useful.  */
        !           592: #define INDEX_REG_CLASS LOCAL_OR_GLOBAL_REGS
        !           593: #define BASE_REG_CLASS LOCAL_OR_GLOBAL_REGS
        !           594: 
        !           595: /* Get reg_class from a letter such as appears in the machine description.
        !           596:    'f' is a floating point register (fp0..fp3)
        !           597:    'l' is a local register (r0-r15)
        !           598:    'b' is a global register (g0-g15)
        !           599:    'd' is any local or global register
        !           600:    'r' or 'g' are pre-defined to the class GENERAL_REGS.  */
        !           601: /* 'l' and 'b' are probably never used.  Note that 'd' and 'r' are *not*
        !           602:    the same thing, since 'r' may include the fp registers.  */
        !           603: #define REG_CLASS_FROM_LETTER(C) \
        !           604:   (((C) == 'f') && (TARGET_NUMERICS) ? FP_REGS : ((C) == 'l' ? LOCAL_REGS : \
        !           605:     (C) == 'b' ? GLOBAL_REGS : ((C) == 'd' ? LOCAL_OR_GLOBAL_REGS : NO_REGS)))
        !           606: 
        !           607: /* The letters I, J, K, L and M in a register constraint string
        !           608:    can be used to stand for particular ranges of immediate operands.
        !           609:    This macro defines what the ranges are.
        !           610:    C is the letter, and VALUE is a constant value.
        !           611:    Return 1 if VALUE is in the range specified by C.
        !           612: 
        !           613:    For 80960:
        !           614:        'I' is used for literal values 0..31
        !           615:        'J' means literal 0
        !           616:        'K' means 0..-31.  */
        !           617: 
        !           618: #define CONST_OK_FOR_LETTER_P(VALUE, C)                                \
        !           619:   ((C) == 'I' ? (((unsigned) (VALUE)) <= 31)                           \
        !           620:    : (C) == 'J' ? ((VALUE) == 0)                                       \
        !           621:       : (C) == 'K' ? ((VALUE) > -32 && (VALUE) <= 0)                   \
        !           622:        : 0)
        !           623: 
        !           624: /* Similar, but for floating constants, and defining letters G and H.
        !           625:    Here VALUE is the CONST_DOUBLE rtx itself.
        !           626:    For the 80960, G is 0.0 and H is 1.0.  */
        !           627: 
        !           628: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)         \
        !           629:   ((TARGET_NUMERICS) &&                                        \
        !           630:    (((C) == 'G' && ((VALUE) == CONST0_RTX (DFmode)     \
        !           631:                    || (VALUE) == CONST0_RTX (SFmode))) \
        !           632:     || ((C) == 'H' && ((VALUE) == CONST1_RTX (DFmode)  \
        !           633:                       || (VALUE) == CONST1_RTX (SFmode)))))
        !           634: 
        !           635: /* Given an rtx X being reloaded into a reg required to be
        !           636:    in class CLASS, return the class of reg to actually use.
        !           637:    In general this is just CLASS; but on some machines
        !           638:    in some cases it is preferable to use a more restrictive class.  */
        !           639: 
        !           640: /* On 960, can't load constant into floating-point reg except
        !           641:    0.0 or 1.0.
        !           642: 
        !           643:    Any hard reg is ok as a src operand of a reload insn.  */
        !           644: 
        !           645: #define PREFERRED_RELOAD_CLASS(X,CLASS)                        \
        !           646:   (GET_CODE (X) == REG && REGNO (X) < FIRST_PSEUDO_REGISTER    \
        !           647:    ? (CLASS)                                                   \
        !           648:    : ((CLASS) == FP_REGS && CONSTANT_P (X)                     \
        !           649:       && (X) != CONST0_RTX (DFmode) && (X) != CONST1_RTX (DFmode)\
        !           650:       && (X) != CONST0_RTX (SFmode) && (X) != CONST1_RTX (SFmode)\
        !           651:       ? NO_REGS                                                        \
        !           652:       : (CLASS) == ALL_REGS ? LOCAL_OR_GLOBAL_REGS : (CLASS)))
        !           653: 
        !           654: #define SECONDARY_RELOAD_CLASS(CLASS,MODE,IN) \
        !           655:   secondary_reload_class (CLASS, MODE, IN)
        !           656: 
        !           657: /* Return the maximum number of consecutive registers
        !           658:    needed to represent mode MODE in a register of class CLASS.  */
        !           659: /* On 80960, this is the size of MODE in words,
        !           660:    except in the FP regs, where a single reg is always enough.  */
        !           661: #define CLASS_MAX_NREGS(CLASS, MODE)                                   \
        !           662:   ((CLASS) == FP_REGS ? 1 : HARD_REGNO_NREGS (0, (MODE)))
        !           663: 
        !           664: /* Stack layout; function entry, exit and calling.  */
        !           665: 
        !           666: /* Define this if pushing a word on the stack
        !           667:    makes the stack pointer a smaller address.  */
        !           668: /* #define STACK_GROWS_DOWNWARD */
        !           669: 
        !           670: /* Define this if the nominal address of the stack frame
        !           671:    is at the high-address end of the local variables;
        !           672:    that is, each additional local variable allocated
        !           673:    goes at a more negative offset in the frame.  */
        !           674: /* #define FRAME_GROWS_DOWNWARD */
        !           675: 
        !           676: /* Offset within stack frame to start allocating local variables at.
        !           677:    If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
        !           678:    first local allocated.  Otherwise, it is the offset to the BEGINNING
        !           679:    of the first local allocated.
        !           680: 
        !           681:    The i960 has a 64 byte register save area, plus possibly some extra
        !           682:    bytes allocated for varargs functions.  */
        !           683: #define STARTING_FRAME_OFFSET 64
        !           684: 
        !           685: /* If we generate an insn to push BYTES bytes,
        !           686:    this says how many the stack pointer really advances by.
        !           687:    On 80960, don't define this because there are no push insns.  */
        !           688: /* #define PUSH_ROUNDING(BYTES) BYTES */
        !           689: 
        !           690: /* Offset of first parameter from the argument pointer register value.  */
        !           691: #define FIRST_PARM_OFFSET(FNDECL) 0
        !           692: 
        !           693: /* When a parameter is passed in a register, no stack space is
        !           694:    allocated for it.  However, when args are passed in the
        !           695:    stack, space is allocated for every register parameter.  */
        !           696: #define MAYBE_REG_PARM_STACK_SPACE 48
        !           697: #define FINAL_REG_PARM_STACK_SPACE(CONST_SIZE, VAR_SIZE)       \
        !           698:   i960_final_reg_parm_stack_space (CONST_SIZE, VAR_SIZE);
        !           699: #define REG_PARM_STACK_SPACE(DECL) i960_reg_parm_stack_space (DECL)
        !           700: #define OUTGOING_REG_PARM_STACK_SPACE
        !           701: 
        !           702: /* Keep the stack pointer constant throughout the function.  */
        !           703: #define ACCUMULATE_OUTGOING_ARGS
        !           704: 
        !           705: /* Value is 1 if returning from a function call automatically
        !           706:    pops the arguments described by the number-of-args field in the call.
        !           707:    FUNTYPE is the data type of the function (as a tree),
        !           708:    or for a library call it is an identifier node for the subroutine name.  */
        !           709: 
        !           710: #define RETURN_POPS_ARGS(FUNTYPE, SIZE) 0
        !           711: 
        !           712: /* Define how to find the value returned by a library function
        !           713:    assuming the value has mode MODE.  */
        !           714: 
        !           715: #define LIBCALL_VALUE(MODE) gen_rtx ((REG), (MODE), 0)
        !           716: 
        !           717: /* 1 if N is a possible register number for a function value
        !           718:    as seen by the caller.
        !           719:    On 80960, returns are in g0..g3 */
        !           720: 
        !           721: #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
        !           722: 
        !           723: /* 1 if N is a possible register number for function argument passing.
        !           724:    On 80960, parameters are passed in g0..g11 */
        !           725: 
        !           726: #define FUNCTION_ARG_REGNO_P(N) ((N) < 12)
        !           727: 
        !           728: /* Perform any needed actions needed for a function that is receiving a
        !           729:    variable number of arguments. 
        !           730: 
        !           731:    CUM is as above.
        !           732: 
        !           733:    MODE and TYPE are the mode and type of the current parameter.
        !           734: 
        !           735:    PRETEND_SIZE is a variable that should be set to the amount of stack
        !           736:    that must be pushed by the prolog to pretend that our caller pushed
        !           737:    it.
        !           738: 
        !           739:    Normally, this macro will push all remaining incoming registers on the
        !           740:    stack and set PRETEND_SIZE to the length of the registers pushed.  */
        !           741: 
        !           742: #define SETUP_INCOMING_VARARGS(CUM,MODE,TYPE,PRETEND_SIZE,NO_RTL) \
        !           743:   i960_setup_incoming_varargs(&CUM,MODE,TYPE,&PRETEND_SIZE,NO_RTL)
        !           744: 
        !           745: /* Define a data type for recording info about an argument list
        !           746:    during the scan of that argument list.  This data type should
        !           747:    hold all necessary information about the function itself
        !           748:    and about the args processed so far, enough to enable macros
        !           749:    such as FUNCTION_ARG to determine where the next arg should go.
        !           750: 
        !           751:    On 80960, this is two integers, which count the number of register
        !           752:    parameters and the number of stack parameters seen so far.  */
        !           753: 
        !           754: struct cum_args { int ca_nregparms; int ca_nstackparms; };
        !           755: 
        !           756: #define CUMULATIVE_ARGS struct cum_args
        !           757: 
        !           758: /* Define the number of registers that can hold parameters.
        !           759:    This macro is used only in macro definitions below and/or i960.c.  */
        !           760: #define NPARM_REGS 12
        !           761: 
        !           762: /* Define how to round to the next parameter boundary.
        !           763:    This macro is used only in macro definitions below and/or i960.c.  */
        !           764: #define ROUND_PARM(X, MULTIPLE_OF)     \
        !           765:   ((((X) + (MULTIPLE_OF) - 1) / (MULTIPLE_OF)) * MULTIPLE_OF)
        !           766: 
        !           767: /* Initialize a variable CUM of type CUMULATIVE_ARGS
        !           768:    for a call to a function whose data type is FNTYPE.
        !           769:    For a library call, FNTYPE is 0.
        !           770: 
        !           771:    On 80960, the offset always starts at 0; the first parm reg is g0.  */
        !           772: 
        !           773: #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME)       \
        !           774:   ((CUM).ca_nregparms = 0, (CUM).ca_nstackparms = 0)
        !           775: 
        !           776: /* Update the data in CUM to advance over an argument
        !           777:    of mode MODE and data type TYPE.
        !           778:    CUM should be advanced to align with the data type accessed and
        !           779:    also the size of that data type in # of regs.
        !           780:    (TYPE is null for libcalls where that information may not be available.)  */
        !           781: 
        !           782: #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)   \
        !           783:   i960_function_arg_advance(&CUM, MODE, TYPE, NAMED)
        !           784: 
        !           785: /* Indicate the alignment boundary for an argument of the specified mode and
        !           786:    type.  */
        !           787: #define FUNCTION_ARG_BOUNDARY(MODE, TYPE)                              \
        !           788:   (((TYPE) != 0)                                                       \
        !           789:    ? ((TYPE_ALIGN (TYPE) <= PARM_BOUNDARY)                             \
        !           790:       ? PARM_BOUNDARY                                                  \
        !           791:       : TYPE_ALIGN (TYPE))                                             \
        !           792:    : ((GET_MODE_ALIGNMENT (MODE) <= PARM_BOUNDARY)                     \
        !           793:       ? PARM_BOUNDARY                                                  \
        !           794:       : GET_MODE_ALIGNMENT (MODE)))
        !           795: 
        !           796: /* Determine where to put an argument to a function.
        !           797:    Value is zero to push the argument on the stack,
        !           798:    or a hard register in which to store the argument.
        !           799: 
        !           800:    MODE is the argument's machine mode.
        !           801:    TYPE is the data type of the argument (as a tree).
        !           802:     This is null for libcalls where that information may
        !           803:     not be available.
        !           804:    CUM is a variable of type CUMULATIVE_ARGS which gives info about
        !           805:     the preceding args and about the function being called.
        !           806:    NAMED is nonzero if this argument is a named parameter
        !           807:     (otherwise it is an extra parameter matching an ellipsis).  */
        !           808: 
        !           809: extern struct rtx_def *i960_function_arg ();
        !           810: #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED)   \
        !           811:   i960_function_arg(&CUM, MODE, TYPE, NAMED)
        !           812: 
        !           813: /* Define how to find the value returned by a function.
        !           814:    VALTYPE is the data type of the value (as a tree).
        !           815:    If the precise function being called is known, FUNC is its FUNCTION_DECL;
        !           816:    otherwise, FUNC is 0.  */
        !           817: 
        !           818: #define FUNCTION_VALUE(TYPE, FUNC) \
        !           819:   gen_rtx (REG, TYPE_MODE (TYPE), 0)
        !           820: 
        !           821: /* Force aggregates and objects larger than 16 bytes to be returned in memory,
        !           822:    since we only have 4 registers available for return values.  */
        !           823: 
        !           824: #define RETURN_IN_MEMORY(TYPE) \
        !           825:   (TYPE_MODE (TYPE) == BLKmode || int_size_in_bytes (TYPE) > 16)
        !           826: 
        !           827: /* Don't default to pcc-struct-return, because we have already specified
        !           828:    exactly how to return structures in the RETURN_IN_MEMORY macro.  */
        !           829: #define DEFAULT_PCC_STRUCT_RETURN 0
        !           830: 
        !           831: /* For an arg passed partly in registers and partly in memory,
        !           832:    this is the number of registers used.
        !           833:    This never happens on 80960.  */
        !           834: 
        !           835: #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) 0
        !           836: 
        !           837: /* Output the label for a function definition.
        !           838:   This handles leaf functions and a few other things for the i960.  */
        !           839: 
        !           840: #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)    \
        !           841:   i960_function_name_declare (FILE, NAME, DECL)
        !           842: 
        !           843: /* This macro generates the assembly code for function entry.
        !           844:    FILE is a stdio stream to output the code to.
        !           845:    SIZE is an int: how many units of temporary storage to allocate.
        !           846:    Refer to the array `regs_ever_live' to determine which registers
        !           847:    to save; `regs_ever_live[I]' is nonzero if register number I
        !           848:    is ever used in the function.  This macro is responsible for
        !           849:    knowing which registers should not be saved even if used.  */
        !           850: 
        !           851: #define FUNCTION_PROLOGUE(FILE, SIZE) i960_function_prologue ((FILE), (SIZE))
        !           852: 
        !           853: /* Output assembler code to FILE to increment profiler label # LABELNO
        !           854:    for profiling a function entry.  */
        !           855: 
        !           856: #define FUNCTION_PROFILER(FILE, LABELNO)       \
        !           857:   output_function_profiler ((FILE), (LABELNO));
        !           858: 
        !           859: /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
        !           860:    the stack pointer does not matter.  The value is tested only in
        !           861:    functions that have frame pointers.
        !           862:    No definition is equivalent to always zero.  */
        !           863: 
        !           864: #define        EXIT_IGNORE_STACK 1
        !           865: 
        !           866: /* This macro generates the assembly code for function exit,
        !           867:    on machines that need it.  If FUNCTION_EPILOGUE is not defined
        !           868:    then individual return instructions are generated for each
        !           869:    return statement.  Args are same as for FUNCTION_PROLOGUE.
        !           870: 
        !           871:    The function epilogue should not depend on the current stack pointer!
        !           872:    It should use the frame pointer only.  This is mandatory because
        !           873:    of alloca; we also take advantage of it to omit stack adjustments
        !           874:    before returning.  */
        !           875: 
        !           876: #define FUNCTION_EPILOGUE(FILE, SIZE) i960_function_epilogue (FILE, SIZE)
        !           877: 
        !           878: /* Addressing modes, and classification of registers for them.  */
        !           879: 
        !           880: /* #define HAVE_POST_INCREMENT */
        !           881: /* #define HAVE_POST_DECREMENT */
        !           882: 
        !           883: /* #define HAVE_PRE_DECREMENT */
        !           884: /* #define HAVE_PRE_INCREMENT */
        !           885: 
        !           886: /* Macros to check register numbers against specific register classes.  */
        !           887: 
        !           888: /* These assume that REGNO is a hard or pseudo reg number.
        !           889:    They give nonzero only if REGNO is a hard reg of the suitable class
        !           890:    or a pseudo reg currently allocated to a suitable hard reg.
        !           891:    Since they use reg_renumber, they are safe only once reg_renumber
        !           892:    has been allocated, which happens in local-alloc.c.  */
        !           893: 
        !           894: #define REGNO_OK_FOR_INDEX_P(REGNO) \
        !           895:   ((REGNO) < 32 || (unsigned) reg_renumber[REGNO] < 32)
        !           896: #define REGNO_OK_FOR_BASE_P(REGNO) \
        !           897:   ((REGNO) < 32 || (unsigned) reg_renumber[REGNO] < 32)
        !           898: #define REGNO_OK_FOR_FP_P(REGNO) \
        !           899:   ((REGNO) < 36 || (unsigned) reg_renumber[REGNO] < 36)
        !           900: 
        !           901: /* Now macros that check whether X is a register and also,
        !           902:    strictly, whether it is in a specified class.
        !           903: 
        !           904:    These macros are specific to the 960, and may be used only
        !           905:    in code for printing assembler insns and in conditions for
        !           906:    define_optimization.  */
        !           907: 
        !           908: /* 1 if X is an fp register.  */
        !           909: 
        !           910: #define FP_REG_P(X) (REGNO (X) >= 32 && REGNO (X) < 36)
        !           911: 
        !           912: /* Maximum number of registers that can appear in a valid memory address.  */
        !           913: #define        MAX_REGS_PER_ADDRESS 2
        !           914: 
        !           915: #define CONSTANT_ADDRESS_P(X)   \
        !           916:   (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF             \
        !           917:    || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST               \
        !           918:    || GET_CODE (X) == HIGH)
        !           919: 
        !           920: /* LEGITIMATE_CONSTANT_P is nonzero if the constant value X
        !           921:    is a legitimate general operand.
        !           922:    It is given that X satisfies CONSTANT_P.
        !           923: 
        !           924:    Anything but a CONST_DOUBLE can be made to work, excepting 0.0 and 1.0.  */
        !           925: 
        !           926: #define LEGITIMATE_CONSTANT_P(X) \
        !           927:   ((GET_CODE (X) != CONST_DOUBLE) || fp_literal ((X), VOIDmode))
        !           928: 
        !           929: /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
        !           930:    and check its validity for a certain class.
        !           931:    We have two alternate definitions for each of them.
        !           932:    The usual definition accepts all pseudo regs; the other rejects
        !           933:    them unless they have been allocated suitable hard regs.
        !           934:    The symbol REG_OK_STRICT causes the latter definition to be used.
        !           935: 
        !           936:    Most source files want to accept pseudo regs in the hope that
        !           937:    they will get allocated to the class that the insn wants them to be in.
        !           938:    Source files for reload pass need to be strict.
        !           939:    After reload, it makes no difference, since pseudo regs have
        !           940:    been eliminated by then.  */
        !           941: 
        !           942: #ifndef REG_OK_STRICT
        !           943: 
        !           944: /* Nonzero if X is a hard reg that can be used as an index
        !           945:    or if it is a pseudo reg.  */
        !           946: #define REG_OK_FOR_INDEX_P(X) \
        !           947:   (REGNO (X) < 32 || REGNO (X) >= FIRST_PSEUDO_REGISTER)
        !           948: /* Nonzero if X is a hard reg that can be used as a base reg
        !           949:    or if it is a pseudo reg.  */
        !           950: #define REG_OK_FOR_BASE_P(X) \
        !           951:   (REGNO (X) < 32 || REGNO (X) >= FIRST_PSEUDO_REGISTER)
        !           952: 
        !           953: #define REG_OK_FOR_INDEX_P_STRICT(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
        !           954: #define REG_OK_FOR_BASE_P_STRICT(X) REGNO_OK_FOR_BASE_P (REGNO (X))
        !           955: 
        !           956: #else
        !           957: 
        !           958: /* Nonzero if X is a hard reg that can be used as an index.  */
        !           959: #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
        !           960: /* Nonzero if X is a hard reg that can be used as a base reg.  */
        !           961: #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
        !           962: 
        !           963: #endif
        !           964: 
        !           965: /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
        !           966:    that is a valid memory address for an instruction.
        !           967:    The MODE argument is the machine mode for the MEM expression
        !           968:    that wants to use this address.
        !           969: 
        !           970:        On 80960, legitimate addresses are:
        !           971:                base                            ld      (g0),r0
        !           972:                disp    (12 or 32 bit)          ld      foo,r0
        !           973:                base + index                    ld      (g0)[g1*1],r0
        !           974:                base + displ                    ld      0xf00(g0),r0
        !           975:                base + index*scale + displ      ld      0xf00(g0)[g1*4],r0
        !           976:                index*scale + base              ld      (g0)[g1*4],r0
        !           977:                index*scale + displ             ld      0xf00[g1*4],r0
        !           978:                index*scale                     ld      [g1*4],r0
        !           979:                index + base + displ            ld      0xf00(g0)[g1*1],r0
        !           980: 
        !           981:        In each case, scale can be 1, 2, 4, 8, or 16.  */
        !           982: 
        !           983: /* Returns 1 if the scale factor of an index term is valid. */
        !           984: #define SCALE_TERM_P(X)                                                        \
        !           985:   (GET_CODE (X) == CONST_INT                                           \
        !           986:    && (INTVAL (X) == 1 || INTVAL (X) == 2 || INTVAL (X) == 4           \
        !           987:        || INTVAL(X) == 8 || INTVAL (X) == 16))
        !           988: 
        !           989: 
        !           990: #ifdef REG_OK_STRICT
        !           991: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
        !           992:   { if (legitimate_address_p (MODE, X, 1)) goto ADDR; }
        !           993: #else
        !           994: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
        !           995:   { if (legitimate_address_p (MODE, X, 0)) goto ADDR; }
        !           996: #endif
        !           997: 
        !           998: /* Try machine-dependent ways of modifying an illegitimate address
        !           999:    to be legitimate.  If we find one, return the new, valid address.
        !          1000:    This macro is used in only one place: `memory_address' in explow.c.
        !          1001: 
        !          1002:    OLDX is the address as it was before break_out_memory_refs was called.
        !          1003:    In some cases it is useful to look at this to decide what needs to be done.
        !          1004: 
        !          1005:    MODE and WIN are passed so that this macro can use
        !          1006:    GO_IF_LEGITIMATE_ADDRESS.
        !          1007: 
        !          1008:    It is always safe for this macro to do nothing.  It exists to recognize
        !          1009:    opportunities to optimize the output.  */
        !          1010: 
        !          1011: /* On 80960, convert non-canonical addresses to canonical form.  */
        !          1012: 
        !          1013: extern struct rtx_def *legitimize_address ();
        !          1014: #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
        !          1015: { rtx orig_x = (X);                            \
        !          1016:   (X) = legitimize_address (X, OLDX, MODE);    \
        !          1017:   if ((X) != orig_x && memory_address_p (MODE, X)) \
        !          1018:     goto WIN; }
        !          1019: 
        !          1020: /* Go to LABEL if ADDR (a legitimate address expression)
        !          1021:    has an effect that depends on the machine mode it is used for.
        !          1022:    On the 960 this is never true.  */
        !          1023: 
        !          1024: #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL)
        !          1025: 
        !          1026: /* Specify the machine mode that this machine uses
        !          1027:    for the index in the tablejump instruction.  */
        !          1028: #define CASE_VECTOR_MODE SImode
        !          1029: 
        !          1030: /* Define this if the tablejump instruction expects the table
        !          1031:    to contain offsets from the address of the table.
        !          1032:    Do not define this if the table should contain absolute addresses.  */
        !          1033: /* #define CASE_VECTOR_PC_RELATIVE */
        !          1034: 
        !          1035: /* Specify the tree operation to be used to convert reals to integers.  */
        !          1036: #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
        !          1037: 
        !          1038: /* This is the kind of divide that is easiest to do in the general case.  */
        !          1039: #define EASY_DIV_EXPR TRUNC_DIV_EXPR
        !          1040: 
        !          1041: /* Define this as 1 if `char' should by default be signed; else as 0.  */
        !          1042: #define DEFAULT_SIGNED_CHAR 0
        !          1043: 
        !          1044: /* Allow and ignore #sccs directives.  */
        !          1045: #define        SCCS_DIRECTIVE
        !          1046: 
        !          1047: /* Max number of bytes we can move from memory to memory
        !          1048:    in one reasonably fast instruction.  */
        !          1049: #define MOVE_MAX 16
        !          1050: 
        !          1051: /* Define if normal loads of shorter-than-word items from memory clears
        !          1052:    the rest of the bigs in the register.  */
        !          1053: #define BYTE_LOADS_ZERO_EXTEND
        !          1054: 
        !          1055: /* Nonzero if access to memory by bytes is no faster than for words.
        !          1056:    Defining this results in worse code on the i960.  */
        !          1057: 
        !          1058: #define SLOW_BYTE_ACCESS 0
        !          1059: 
        !          1060: /* We assume that the store-condition-codes instructions store 0 for false
        !          1061:    and some other value for true.  This is the value stored for true.  */
        !          1062: 
        !          1063: #define STORE_FLAG_VALUE 1
        !          1064: 
        !          1065: /* Define if shifts truncate the shift count
        !          1066:    which implies one can omit a sign-extension or zero-extension
        !          1067:    of a shift count.  */
        !          1068: #define SHIFT_COUNT_TRUNCATED
        !          1069: 
        !          1070: /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
        !          1071:    is done just by pretending it is already truncated.  */
        !          1072: #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
        !          1073: 
        !          1074: /* Specify the machine mode that pointers have.
        !          1075:    After generation of rtl, the compiler makes no further distinction
        !          1076:    between pointers and any other objects of this machine mode.  */
        !          1077: #define Pmode SImode
        !          1078: 
        !          1079: /* Specify the widest mode that BLKmode objects can be promoted to */
        !          1080: #define        MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (TImode)
        !          1081: 
        !          1082: /* These global variables are used to pass information between
        !          1083:    cc setter and cc user at insn emit time.  */
        !          1084: 
        !          1085: extern struct rtx_def *i960_compare_op0, *i960_compare_op1;
        !          1086: 
        !          1087: /* Define the function that build the compare insn for scc and bcc.  */
        !          1088: 
        !          1089: extern struct rtx_def *gen_compare_reg ();
        !          1090: 
        !          1091: /* Add any extra modes needed to represent the condition code.
        !          1092: 
        !          1093:    Also, signed and unsigned comparisons are distinguished, as
        !          1094:    are operations which are compatible with chkbit insns.  */
        !          1095: #define EXTRA_CC_MODES CC_UNSmode, CC_CHKmode
        !          1096: 
        !          1097: /* Define the names for the modes specified above.  */
        !          1098: #define EXTRA_CC_NAMES "CC_UNS", "CC_CHK"
        !          1099: 
        !          1100: /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE,
        !          1101:    return the mode to be used for the comparison.  For floating-point, CCFPmode
        !          1102:    should be used.  CC_NOOVmode should be used when the first operand is a
        !          1103:    PLUS, MINUS, or NEG.  CCmode should be used when no special processing is
        !          1104:    needed.  */
        !          1105: #define SELECT_CC_MODE(OP,X,Y) select_cc_mode (OP, X)
        !          1106: 
        !          1107: /* A function address in a call instruction is a byte address
        !          1108:    (for indexing purposes) so give the MEM rtx a byte's mode.  */
        !          1109: #define FUNCTION_MODE SImode
        !          1110: 
        !          1111: /* Define this if addresses of constant functions
        !          1112:    shouldn't be put through pseudo regs where they can be cse'd.
        !          1113:    Desirable on machines where ordinary constants are expensive
        !          1114:    but a CALL with constant address is cheap.  */
        !          1115: #define NO_FUNCTION_CSE
        !          1116: 
        !          1117: /* Use memcpy, etc. instead of bcopy.  */
        !          1118: 
        !          1119: #ifndef WIND_RIVER
        !          1120: #define        TARGET_MEM_FUNCTIONS    1
        !          1121: #endif
        !          1122: 
        !          1123: /* Compute the cost of computing a constant rtl expression RTX
        !          1124:    whose rtx-code is CODE.  The body of this macro is a portion
        !          1125:    of a switch statement.  If the code is computed here,
        !          1126:    return it with a return statement.  Otherwise, break from the switch.  */
        !          1127: 
        !          1128: /* Constants that can be (non-ldconst) insn operands are cost 0.  Constants
        !          1129:    that can be non-ldconst operands in rare cases are cost 1.  Other constants
        !          1130:    have higher costs.  */
        !          1131: 
        !          1132: #define CONST_COSTS(RTX, CODE, OUTER_CODE)                             \
        !          1133:   case CONST_INT:                                                      \
        !          1134:     if ((INTVAL (RTX) >= 0 && INTVAL (RTX) < 32)                       \
        !          1135:        || power2_operand (RTX, VOIDmode))                              \
        !          1136:       return 0;                                                        \
        !          1137:     else if (INTVAL (RTX) >= -31 && INTVAL (RTX) < 0)                  \
        !          1138:       return 1;                                                                \
        !          1139:   case CONST:                                                          \
        !          1140:   case LABEL_REF:                                                      \
        !          1141:   case SYMBOL_REF:                                                     \
        !          1142:     return (TARGET_FLAG_C_SERIES ? 6 : 8);                             \
        !          1143:   case CONST_DOUBLE:                                                   \
        !          1144:     if ((RTX) == CONST0_RTX (DFmode) || (RTX) == CONST0_RTX (SFmode)   \
        !          1145:        || (RTX) == CONST1_RTX (DFmode) || (RTX) == CONST1_RTX (SFmode))\
        !          1146:       return 1;                                                                \
        !          1147:     return 12;
        !          1148: 
        !          1149: /* The i960 offers addressing modes which are "as cheap as a register".
        !          1150:    See i960.c (or gcc.texinfo) for details.  */
        !          1151: 
        !          1152: #define ADDRESS_COST(RTX) \
        !          1153:   (GET_CODE (RTX) == REG ? 1 : i960_address_cost (RTX))
        !          1154: 
        !          1155: /* Control the assembler format that we output.  */
        !          1156: 
        !          1157: /* Output at beginning of assembler file.  */
        !          1158: 
        !          1159: #define ASM_FILE_START(file)
        !          1160: 
        !          1161: /* Output to assembler file text saying following lines
        !          1162:    may contain character constants, extra white space, comments, etc.  */
        !          1163: 
        !          1164: #define ASM_APP_ON ""
        !          1165: 
        !          1166: /* Output to assembler file text saying following lines
        !          1167:    no longer contain unusual constructs.  */
        !          1168: 
        !          1169: #define ASM_APP_OFF ""
        !          1170: 
        !          1171: /* Output before read-only data.  */
        !          1172: 
        !          1173: #define TEXT_SECTION_ASM_OP ".text"
        !          1174: 
        !          1175: /* Output before writable data.  */
        !          1176: 
        !          1177: #define DATA_SECTION_ASM_OP ".data"
        !          1178: 
        !          1179: /* How to refer to registers in assembler output.
        !          1180:    This sequence is indexed by compiler's hard-register-number (see above).  */
        !          1181: 
        !          1182: #define REGISTER_NAMES {                                               \
        !          1183:        "g0", "g1", "g2",  "g3",  "g4",  "g5",  "g6",  "g7",            \
        !          1184:        "g8", "g9", "g10", "g11", "g12", "g13", "g14", "fp",            \
        !          1185:        "pfp","sp", "rip", "r3",  "r4",  "r5",  "r6",  "r7",            \
        !          1186:        "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",           \
        !          1187:        "fp0","fp1","fp2", "fp3", "cc", "fake" }
        !          1188: 
        !          1189: /* How to renumber registers for dbx and gdb.
        !          1190:    In the 960 encoding, g0..g15 are registers 16..31.  */
        !          1191: 
        !          1192: #define DBX_REGISTER_NUMBER(REGNO)                                     \
        !          1193:   (((REGNO) < 16) ? (REGNO) + 16                                       \
        !          1194:    : (((REGNO) > 31) ? (REGNO) : (REGNO) - 16))
        !          1195: 
        !          1196: /* Don't emit dbx records longer than this.  This is an arbitrary value.  */
        !          1197: #define DBX_CONTIN_LENGTH 1500
        !          1198: 
        !          1199: /* This is how to output a note to DBX telling it the line number
        !          1200:    to which the following sequence of instructions corresponds. */
        !          1201: 
        !          1202: #define ASM_OUTPUT_SOURCE_LINE(FILE, LINE)                     \
        !          1203: { if (write_symbols == SDB_DEBUG) {                            \
        !          1204:     fprintf ((FILE), "\t.ln    %d\n",                          \
        !          1205:             (sdb_begin_function_line                           \
        !          1206:              ? (LINE) - sdb_begin_function_line : 1));         \
        !          1207:   } else if (write_symbols == DBX_DEBUG) {                     \
        !          1208:        fprintf((FILE),"\t.stabd        68,0,%d\n",(LINE));     \
        !          1209:   } }
        !          1210: 
        !          1211: /* This is how to output the definition of a user-level label named NAME,
        !          1212:    such as the label on a static function or variable NAME.  */
        !          1213: 
        !          1214: #define ASM_OUTPUT_LABEL(FILE,NAME)    \
        !          1215:   do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
        !          1216: 
        !          1217: /* This is how to output a command to make the user-level label named NAME
        !          1218:    defined for reference from other files.  */
        !          1219: 
        !          1220: #define ASM_GLOBALIZE_LABEL(FILE,NAME)         \
        !          1221: { fputs ("\t.globl ", FILE);                   \
        !          1222:   assemble_name (FILE, NAME);                  \
        !          1223:   fputs ("\n", FILE); }
        !          1224: 
        !          1225: /* This is how to output a reference to a user-level label named NAME.
        !          1226:    `assemble_name' uses this.  */
        !          1227: 
        !          1228: #define ASM_OUTPUT_LABELREF(FILE,NAME) fprintf (FILE, "_%s", NAME)
        !          1229: 
        !          1230: /* This is how to output an internal numbered label where
        !          1231:    PREFIX is the class of label and NUM is the number within the class.  */
        !          1232: 
        !          1233: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)     \
        !          1234:   fprintf (FILE, "%s%d:\n", PREFIX, NUM)
        !          1235: 
        !          1236: /* This is how to store into the string LABEL
        !          1237:    the symbol_ref name of an internal numbered label where
        !          1238:    PREFIX is the class of label and NUM is the number within the class.
        !          1239:    This is suitable for output with `assemble_name'.  */
        !          1240: 
        !          1241: #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)  \
        !          1242:   sprintf (LABEL, "*%s%d", PREFIX, NUM)
        !          1243: 
        !          1244: /* This is how to output an assembler line defining a `double' constant.  */
        !          1245: 
        !          1246: #define ASM_OUTPUT_DOUBLE(FILE,VALUE)  i960_output_double(FILE, VALUE)
        !          1247: 
        !          1248: /* This is how to output an assembler line defining a `float' constant.  */
        !          1249: 
        !          1250: #define ASM_OUTPUT_FLOAT(FILE,VALUE)  i960_output_float(FILE, VALUE)
        !          1251: 
        !          1252: /* This is how to output an assembler line defining an `int' constant.  */
        !          1253: 
        !          1254: #define ASM_OUTPUT_INT(FILE,VALUE)  \
        !          1255: ( fprintf (FILE, "\t.word "),                  \
        !          1256:   output_addr_const (FILE, (VALUE)),           \
        !          1257:   fprintf (FILE, "\n"))
        !          1258: 
        !          1259: /* Likewise for `char' and `short' constants.  */
        !          1260: 
        !          1261: #define ASM_OUTPUT_SHORT(FILE,VALUE)  \
        !          1262: ( fprintf (FILE, "\t.short "),                 \
        !          1263:   output_addr_const (FILE, (VALUE)),           \
        !          1264:   fprintf (FILE, "\n"))
        !          1265: 
        !          1266: #define ASM_OUTPUT_CHAR(FILE,VALUE)  \
        !          1267: ( fprintf (FILE, "\t.byte "),                  \
        !          1268:   output_addr_const (FILE, (VALUE)),           \
        !          1269:   fprintf (FILE, "\n"))
        !          1270: 
        !          1271: /* This is how to output an assembler line for a numeric constant byte.  */
        !          1272: 
        !          1273: #define ASM_OUTPUT_BYTE(FILE,VALUE)    \
        !          1274:   fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
        !          1275: 
        !          1276: #define ASM_OUTPUT_REG_PUSH(FILE,REGNO)  \
        !          1277:   fprintf (FILE, "\tst\t%s,(sp)\n\taddo\t4,sp,sp\n", reg_names[REGNO])
        !          1278: 
        !          1279: /* This is how to output an insn to pop a register from the stack.
        !          1280:    It need not be very fast code.  */
        !          1281: 
        !          1282: #define ASM_OUTPUT_REG_POP(FILE,REGNO)  \
        !          1283:   fprintf (FILE, "\tsubo\t4,sp,sp\n\tld\t(sp),%s\n", reg_names[REGNO])
        !          1284: 
        !          1285: /* This is how to output an element of a case-vector that is absolute.  */
        !          1286: 
        !          1287: #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
        !          1288:   fprintf (FILE, "\t.word L%d\n", VALUE)
        !          1289: 
        !          1290: /* This is how to output an element of a case-vector that is relative.  */
        !          1291: 
        !          1292: #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL)  \
        !          1293:   fprintf (FILE, "\t.word L%d-L%d\n", VALUE, REL)
        !          1294: 
        !          1295: /* This is how to output an assembler line that says to advance the
        !          1296:    location counter to a multiple of 2**LOG bytes.  */
        !          1297: 
        !          1298: #define ASM_OUTPUT_ALIGN(FILE,LOG)     \
        !          1299:   fprintf (FILE, "\t.align %d\n", (LOG))
        !          1300: 
        !          1301: #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
        !          1302:   fprintf (FILE, "\t.space %d\n", (SIZE))
        !          1303: 
        !          1304: /* This says how to output an assembler line
        !          1305:    to define a global common symbol.  */
        !          1306: 
        !          1307: /* For common objects, output unpadded size... gld960 & lnk960 both
        !          1308:    have code to align each common object at link time.  Also, if size
        !          1309:    is 0, treat this as a declaration, not a definition - i.e.,
        !          1310:    do nothing at all.  */
        !          1311: 
        !          1312: #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)   \
        !          1313: { if ((SIZE) != 0)                                     \
        !          1314:     {                                                  \
        !          1315:       fputs (".globl ", (FILE)),                       \
        !          1316:       assemble_name ((FILE), (NAME)),                  \
        !          1317:       fputs ("\n.comm ", (FILE)),                      \
        !          1318:       assemble_name ((FILE), (NAME)),                  \
        !          1319:       fprintf ((FILE), ",%d\n", (ROUNDED));            \
        !          1320:     }                                                  \
        !          1321: }
        !          1322: 
        !          1323: /* This says how to output an assembler line to define a local common symbol.
        !          1324:    Output unpadded size, with request to linker to align as requested.
        !          1325:    0 size should not be possible here.  */
        !          1326: 
        !          1327: #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)  \
        !          1328: ( fputs (".bss\t", (FILE)),                    \
        !          1329:   assemble_name ((FILE), (NAME)),              \
        !          1330:   fprintf ((FILE), ",%d,%d\n", (SIZE),         \
        !          1331:           ((ALIGN) <= 8 ? 0                    \
        !          1332:            : ((ALIGN) <= 16 ? 1                \
        !          1333:               : ((ALIGN) <= 32 ? 2             \
        !          1334:                  : ((ALIGN <= 64 ? 3 : 4)))))))
        !          1335: 
        !          1336: /* Output text for an #ident directive.  */
        !          1337: #define        ASM_OUTPUT_IDENT(FILE, STR)  fprintf(FILE, "\t# %s\n", STR);
        !          1338: 
        !          1339: /* Align code to 8 byte boundary if TARGET_CODE_ALIGN is true.  */
        !          1340: 
        !          1341: #define        ASM_OUTPUT_ALIGN_CODE(FILE)             \
        !          1342: { if (TARGET_CODE_ALIGN) fputs("\t.align 3\n",FILE); }
        !          1343: 
        !          1344: /* Store in OUTPUT a string (made with alloca) containing
        !          1345:    an assembler-name for a local static variable named NAME.
        !          1346:    LABELNO is an integer which is different for each call.  */
        !          1347: 
        !          1348: #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
        !          1349:        ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10),    \
        !          1350:          sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
        !          1351: 
        !          1352: /* Define the parentheses used to group arithmetic operations
        !          1353:    in assembler code.  */
        !          1354: 
        !          1355: #define ASM_OPEN_PAREN "("
        !          1356: #define ASM_CLOSE_PAREN ")"
        !          1357: 
        !          1358: /* Define results of standard character escape sequences.  */
        !          1359: #define TARGET_BELL    007
        !          1360: #define TARGET_BS      010
        !          1361: #define TARGET_TAB     011
        !          1362: #define TARGET_NEWLINE 012
        !          1363: #define TARGET_VT      013
        !          1364: #define TARGET_FF      014
        !          1365: #define TARGET_CR      015
        !          1366: 
        !          1367: /* Output assembler code to FILE to initialize this source file's
        !          1368:    basic block profiling info, if that has not already been done.  */
        !          1369: 
        !          1370: #define FUNCTION_BLOCK_PROFILER(FILE, LABELNO) \
        !          1371: { fprintf (FILE, "\tld LPBX0,g12\n");                  \
        !          1372:   fprintf (FILE, "\tcmpobne    0,g12,LPY%d\n",LABELNO);\
        !          1373:   fprintf (FILE, "\tlda        LPBX0,g12\n");                  \
        !          1374:   fprintf (FILE, "\tcall       ___bb_init_func\n");    \
        !          1375:   fprintf (FILE, "LPY%d:\n",LABELNO); }
        !          1376: 
        !          1377: /* Output assembler code to FILE to increment the entry-count for
        !          1378:    the BLOCKNO'th basic block in this source file.  */
        !          1379: 
        !          1380: #define BLOCK_PROFILER(FILE, BLOCKNO) \
        !          1381: { int blockn = (BLOCKNO);                              \
        !          1382:   fprintf (FILE, "\tld LPBX2+%d,g12\n", 4 * blockn);   \
        !          1383:   fprintf (FILE, "\taddo       g12,1,g12\n");          \
        !          1384:   fprintf (FILE, "\tst g12,LPBX2+%d\n", 4 * blockn); }
        !          1385: 
        !          1386: /* Print operand X (an rtx) in assembler syntax to file FILE.
        !          1387:    CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
        !          1388:    For `%' followed by punctuation, CODE is the punctuation and X is null.  */
        !          1389: 
        !          1390: #define PRINT_OPERAND(FILE, X, CODE)  \
        !          1391:   i960_print_operand (FILE, X, CODE);
        !          1392: 
        !          1393: /* Print a memory address as an operand to reference that memory location.  */
        !          1394: 
        !          1395: #define PRINT_OPERAND_ADDRESS(FILE, ADDR)      \
        !          1396:   i960_print_operand_addr (FILE, ADDR)
        !          1397: 
        !          1398: /* Output assembler code for a block containing the constant parts
        !          1399:    of a trampoline, leaving space for the variable parts.  */
        !          1400: 
        !          1401: /* On the i960, the trampoline contains three instructions:
        !          1402:      ldconst _function, r4
        !          1403:      ldconst static addr, r3
        !          1404:      jump (r4)  */
        !          1405: 
        !          1406: #define TRAMPOLINE_TEMPLATE(FILE)                                      \
        !          1407: {                                                                      \
        !          1408:   ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x8C203000));    \
        !          1409:   ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x00000000));    \
        !          1410:   ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x8C183000));    \
        !          1411:   ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x00000000));    \
        !          1412:   ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x84212000));    \
        !          1413: }
        !          1414: 
        !          1415: /* Length in units of the trampoline for entering a nested function.  */
        !          1416: 
        !          1417: #define TRAMPOLINE_SIZE 20
        !          1418: 
        !          1419: /* Emit RTL insns to initialize the variable parts of a trampoline.
        !          1420:    FNADDR is an RTX for the address of the function's pure code.
        !          1421:    CXT is an RTX for the static chain value for the function.  */
        !          1422: 
        !          1423: #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)                      \
        !          1424: {                                                                      \
        !          1425:   emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 4)),     \
        !          1426:                  FNADDR);                                              \
        !          1427:   emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 12)),    \
        !          1428:                  CXT);                                                 \
        !          1429: }
        !          1430: 
        !          1431: #if 0
        !          1432: /* Promote char and short arguments to ints, when want compatibility with
        !          1433:    the iC960 compilers.  */
        !          1434: 
        !          1435: /* ??? In order for this to work, all users would need to be changed
        !          1436:    to test the value of the macro at run time.  */
        !          1437: #define PROMOTE_PROTOTYPES     TARGET_CLEAN_LINKAGE
        !          1438: /* ??? This does not exist.  */
        !          1439: #define PROMOTE_RETURN         TARGET_CLEAN_LINKAGE
        !          1440: #endif
        !          1441: 
        !          1442: /* Instruction type definitions.  Used to alternate instructions types for
        !          1443:    better performance on the C series chips.  */
        !          1444: 
        !          1445: enum insn_types { I_TYPE_REG, I_TYPE_MEM, I_TYPE_CTRL };
        !          1446: 
        !          1447: /* Holds the insn type of the last insn output to the assembly file.  */
        !          1448: 
        !          1449: extern enum insn_types i960_last_insn_type;
        !          1450: 
        !          1451: /* Parse opcodes, and set the insn last insn type based on them.  */
        !          1452: 
        !          1453: #define ASM_OUTPUT_OPCODE(FILE, INSN)  i960_scan_opcode (INSN)
        !          1454: 
        !          1455: /* Table listing what rtl codes each predicate in i960.c will accept.  */
        !          1456: 
        !          1457: #define PREDICATE_CODES \
        !          1458:   {"fpmove_src_operand", {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF,  \
        !          1459:                          LABEL_REF, SUBREG, REG, MEM}},                \
        !          1460:   {"arith_operand", {SUBREG, REG, CONST_INT}},                         \
        !          1461:   {"fp_arith_operand", {SUBREG, REG, CONST_DOUBLE}},                   \
        !          1462:   {"signed_arith_operand", {SUBREG, REG, CONST_INT}},                  \
        !          1463:   {"literal", {CONST_INT}},                                            \
        !          1464:   {"fp_literal_one", {CONST_DOUBLE}},                                  \
        !          1465:   {"fp_literal_double", {CONST_DOUBLE}},                               \
        !          1466:   {"fp_literal", {CONST_DOUBLE}},                                      \
        !          1467:   {"signed_literal", {CONST_INT}},                                     \
        !          1468:   {"symbolic_memory_operand", {SUBREG, MEM}},                          \
        !          1469:   {"eq_or_neq", {EQ, NE}},                                             \
        !          1470:   {"arith32_operand", {SUBREG, REG, LABEL_REF, SYMBOL_REF, CONST_INT,  \
        !          1471:                       CONST_DOUBLE, CONST}},                           \
        !          1472:   {"power2_operand", {CONST_INT}},
        !          1473: 
        !          1474: /* Define functions in i960.c and used in insn-output.c.  */
        !          1475: 
        !          1476: extern char *i960_output_ldconst ();
        !          1477: extern char *i960_output_call_insn ();
        !          1478: extern char *i960_output_ret_insn ();
        !          1479: 
        !          1480: /* Defined in reload.c, and used in insn-recog.c.  */
        !          1481: 
        !          1482: extern int rtx_equal_function_value_matters;

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