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1.1 ! root 1: /* Definitions of target machine for GNU compiler for Intel 80386. ! 2: Copyright (C) 1988 Free Software Foundation, Inc. ! 3: ! 4: This file is part of GNU CC. ! 5: ! 6: GNU CC is free software; you can redistribute it and/or modify ! 7: it under the terms of the GNU General Public License as published by ! 8: the Free Software Foundation; either version 1, or (at your option) ! 9: any later version. ! 10: ! 11: GNU CC is distributed in the hope that it will be useful, ! 12: but WITHOUT ANY WARRANTY; without even the implied warranty of ! 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ! 14: GNU General Public License for more details. ! 15: ! 16: You should have received a copy of the GNU General Public License ! 17: along with GNU CC; see the file COPYING. If not, write to ! 18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ ! 19: ! 20: ! 21: /* Note that some other tm- files include this one and then override ! 22: many of the definitions that relate to assembler syntax. */ ! 23: ! 24: /* Names to predefine in the preprocessor for this target machine. */ ! 25: ! 26: /* the file tm-compaq.h includes this file */ ! 27: ! 28: ! 29: #define I386 1 ! 30: ! 31: /* Run-time compilation parameters selecting different hardware subsets. */ ! 32: ! 33: extern int target_flags; ! 34: ! 35: /* Macros used in the machine description to test the flags. */ ! 36: ! 37: /* Compile 80387 insns for floating point (not library calls). */ ! 38: #define TARGET_80387 (target_flags & 1) ! 39: /* Compile using ret insn that pops args. ! 40: This will not work unless you use prototypes at least ! 41: for all functions that can take varying numbers of args. */ ! 42: #define TARGET_RTD (target_flags & 8) ! 43: /* Compile passing first two args in regs 0 and 1. ! 44: This exists only to test compiler features that will ! 45: be needed for RISC chips. It is not usable ! 46: and is not intended to be usable on this cpu. */ ! 47: #define TARGET_REGPARM (target_flags & 020) ! 48: ! 49: /* Macro to define tables used to set the flags. ! 50: This is a list in braces of pairs in braces, ! 51: each pair being { "NAME", VALUE } ! 52: where VALUE is the bits to set or minus the bits to clear. ! 53: An empty string NAME is used to identify the default VALUE. */ ! 54: ! 55: #define TARGET_SWITCHES \ ! 56: { { "80387", 1}, \ ! 57: { "soft-float", -1}, \ ! 58: { "rtd", 8}, \ ! 59: { "nortd", -8}, \ ! 60: { "regparm", 020}, \ ! 61: { "noregparm", -020}, \ ! 62: { "", TARGET_DEFAULT}} ! 63: ! 64: /* TARGET_DEFAULT is defined in tm-compaq.h, etc. */ ! 65: ! 66: /* target machine storage layout */ ! 67: ! 68: /* Define this if most significant byte of a word is the lowest numbered. */ ! 69: /* That is true on the 80386. */ ! 70: ! 71: /* #define BITS_BIG_ENDIAN */ ! 72: ! 73: /* Define this if most significant byte of a word is the lowest numbered. */ ! 74: /* That is not true on the 80386. */ ! 75: /* #define BYTES_BIG_ENDIAN */ ! 76: ! 77: /* Define this if most significant word of a multiword number is numbered. */ ! 78: /* Not true for 80386 */ ! 79: /* #define WORDS_BIG_ENDIAN */ ! 80: ! 81: /* number of bits in an addressible storage unit */ ! 82: #define BITS_PER_UNIT 8 ! 83: ! 84: /* Width in bits of a "word", which is the contents of a machine register. ! 85: Note that this is not necessarily the width of data type `int'; ! 86: if using 16-bit ints on a 80386, this would still be 32. ! 87: But on a machine with 16-bit registers, this would be 16. */ ! 88: #define BITS_PER_WORD 32 ! 89: ! 90: /* Width of a word, in units (bytes). */ ! 91: #define UNITS_PER_WORD 4 ! 92: ! 93: /* Width in bits of a pointer. ! 94: See also the macro `Pmode' defined below. */ ! 95: #define POINTER_SIZE 32 ! 96: ! 97: /* Allocation boundary (in *bits*) for storing pointers in memory. */ ! 98: #define POINTER_BOUNDARY 32 ! 99: ! 100: /* Allocation boundary (in *bits*) for storing arguments in argument list. */ ! 101: #define PARM_BOUNDARY 32 ! 102: ! 103: /* Allocation boundary (in *bits*) for the code of a function. */ ! 104: #define FUNCTION_BOUNDARY 32 ! 105: ! 106: /* Alignment of field after `int : 0' in a structure. */ ! 107: ! 108: #define EMPTY_FIELD_BOUNDARY 32 ! 109: ! 110: /* There is no point aligning anything to a rounder boundary than this. */ ! 111: /* Some structures in the ATT libraries are assumed to round up from 16 to 18 ! 112: bytes, for example the _io_buf */ ! 113: #define BIGGEST_ALIGNMENT 32 ! 114: ! 115: /* Define this if move instructions will actually fail to work ! 116: when given unaligned data. */ ! 117: /* #define STRICT_ALIGNMENT */ ! 118: ! 119: /* Standard register usage. */ ! 120: ! 121: /* Number of actual hardware registers. ! 122: The hardware registers are assigned numbers for the compiler ! 123: from 0 to just below FIRST_PSEUDO_REGISTER. ! 124: All registers that the compiler knows about must be given numbers, ! 125: even those that are not normally considered general registers. ! 126: In the 80387 we give the 8 general purpose registers the numbers 0-7, ! 127: we assign 6 numbers for floating point registers 8-13, ! 128: Note that registers 0-7 can be accessed as a short or int, ! 129: while only 0-3 may be used with mov byte instructions. ! 130: */ ! 131: #define FIRST_PSEUDO_REGISTER 10 ! 132: ! 133: /* 1 for registers that have pervasive standard uses ! 134: and are not available for the register allocator. ! 135: On the 80386, only the stack pointer is such. */ ! 136: #define FIXED_REGISTERS \ ! 137: /*ax,ad,ac,ab,si,di,bp,sp,fval,fp0*/ \ ! 138: { 0, 0, 0, 0, 0, 0, 0, 1, 1, 0} ! 139: ! 140: /* ;;change-wfs */ ! 141: ! 142: /* 1 for registers not available across function calls. ! 143: These must include the FIXED_REGISTERS and also any ! 144: registers that can be used without being saved. ! 145: The latter must include the registers where values are returned ! 146: and the register where structure-value addresses are passed. ! 147: Aside from that, you can include as many other registers as you like. */ ! 148: ! 149: #define CALL_USED_REGISTERS \ ! 150: /*ax,ad,ac,ab,si,di,bp,sp,*/ \ ! 151: { 1, 1, 1, 0, 0, 0, 0, 1, \ ! 152: 1, 1} ! 153: ! 154: /* Return number of consecutive hard regs needed starting at reg REGNO ! 155: to hold something of mode MODE. ! 156: This is ordinarily the length in words of a value of mode MODE ! 157: but can be less for certain modes in special long registers. ! 158: ! 159: Actually there are no two word move instructions for consecutive ! 160: registers. And only registers 0-3 may have mov byte instructions ! 161: applied to them. ! 162: */ ! 163: ! 164: #define HARD_REGNO_NREGS(REGNO, MODE) \ ! 165: ((REGNO) >= 8 ? 1 \ ! 166: : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)) ! 167: ! 168: /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE. ! 169: On the 80386, the first 4 cpu registers can hold any mode. ! 170: While the floating point registers may hold SFmode or DFmode only. ! 171: */ ! 172: ! 173: #define HARD_REGNO_MODE_OK(REGNO, MODE) \ ! 174: hard_regno_mode_ok(REGNO,MODE) ! 175: ! 176: /* Value is 1 if it is a good idea to tie two pseudo registers ! 177: when one has mode MODE1 and one has mode MODE2. ! 178: If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2, ! 179: for any hard reg, then this must be 0 for correct output. */ ! 180: ! 181: #define MODES_TIEABLE_P(MODE1, MODE2) ((MODE1) == (MODE2)) ! 182: ! 183: /* Specify the registers used for certain standard purposes. ! 184: The values of these macros are register numbers. */ ! 185: ! 186: /* on the 386 the pc register is %eip, and is not usable as a general ! 187: register. The ordinary mov instructions won't work */ ! 188: /* #define PC_REGNUM */ ! 189: ! 190: /* Register to use for pushing function arguments. */ ! 191: #define STACK_POINTER_REGNUM 7 ! 192: ! 193: /* Base register for access to local variables of the function. */ ! 194: #define FRAME_POINTER_REGNUM 6 ! 195: ! 196: /* First floating point reg */ ! 197: #define FIRST_FLOAT_REG 8 ! 198: /* Value should be nonzero if functions must have frame pointers. ! 199: Zero means the frame pointer need not be set up (and parms ! 200: may be accessed via the stack pointer) in functions that seem suitable. ! 201: This is computed in `reload', in reload1.c. */ ! 202: #define FRAME_POINTER_REQUIRED 0 ! 203: ! 204: /* Base register for access to arguments of the function. */ ! 205: #define ARG_POINTER_REGNUM 6 ! 206: ! 207: /* Register in which static-chain is passed to a function. */ ! 208: #define STATIC_CHAIN_REGNUM 2 ! 209: ! 210: /* Register in which address to store a structure value ! 211: arrives in the function. On the 386, the prologue ! 212: copies this from the stack to register %eax. */ ! 213: #define STRUCT_VALUE_INCOMING \ ! 214: gen_rtx (MEM, Pmode, gen_rtx (PLUS, Pmode, frame_pointer_rtx, \ ! 215: gen_rtx (CONST_INT, VOIDmode, 8))) ! 216: ! 217: /* Place in which caller passes the structure value address. ! 218: Actually, all that matters about this value is it its rtx_code: ! 219: MEM means push the value on the stack like an argument. */ ! 220: #define STRUCT_VALUE \ ! 221: gen_rtx (MEM, Pmode, gen_rtx (PRE_DEC, Pmode, stack_pointer_rtx)) ! 222: ! 223: /* Define the classes of registers for register constraints in the ! 224: machine description. Also define ranges of constants. ! 225: ! 226: One of the classes must always be named ALL_REGS and include all hard regs. ! 227: If there is more than one class, another class must be named NO_REGS ! 228: and contain no registers. ! 229: ! 230: The name GENERAL_REGS must be the name of a class (or an alias for ! 231: another name such as ALL_REGS). This is the class of registers ! 232: that is allowed by "g" or "r" in a register constraint. ! 233: Also, registers outside this class are allocated only when ! 234: instructions express preferences for them. ! 235: ! 236: The classes must be numbered in nondecreasing order; that is, ! 237: a larger-numbered class must never be contained completely ! 238: in a smaller-numbered class. ! 239: ! 240: For any two classes, it is very desirable that there be another ! 241: class that represents their union. */ ! 242: ! 243: ! 244: enum reg_class { ! 245: NO_REGS, AREG, DREG, ADREG, CREG, BREG, Q_REGS, SIREG, DIREG, ! 246: INDEX_REGS, GENERAL_REGS, FLOAT_REGS, ALL_REGS, LIM_REG_CLASSES }; ! 247: ! 248: #define N_REG_CLASSES (int) LIM_REG_CLASSES ! 249: ! 250: /* Give names of register classes as strings for dump file. */ ! 251: ! 252: #define REG_CLASS_NAMES \ ! 253: { "NO_REGS", "AREG", "DREG", "ADREG", "CREG", "BREG","Q_REGS", \ ! 254: "SIREG", "DIREG", \ ! 255: "INDEX_REGS", "GENERAL_REGS", "FLOAT_REGS", "ALL_REGS"} ! 256: /* Define which registers fit in which classes. ! 257: This is an initializer for a vector of HARD_REG_SET ! 258: of length N_REG_CLASSES. */ ! 259: ! 260: ! 261: ! 262: #define REG_CLASS_CONTENTS {0, 0x1, 0x2, 0x3, 0x4, 0x8, 0xf,\ ! 263: 0x10, 0x20, 0x7f, 0xff, 0x300, 0x3ff} ! 264: ! 265: /* The same information, inverted: ! 266: Return the class number of the smallest class containing ! 267: reg number REGNO. This could be a conditional expression ! 268: or could index an array. */ ! 269: ! 270: #define REGNO_REG_CLASS(REGNO) \ ! 271: ((REGNO) == 0 ? AREG : \ ! 272: (REGNO) == 1 ? DREG : \ ! 273: (REGNO) == 2 ? CREG : \ ! 274: (REGNO) == 3 ? BREG : \ ! 275: (REGNO) == 4 ? SIREG : \ ! 276: (REGNO) == 5 ? DIREG : \ ! 277: (REGNO) == 7 ? GENERAL_REGS : \ ! 278: (REGNO) < 8 ? INDEX_REGS : \ ! 279: FLOAT_REGS) ! 280: ! 281: #define NON_QI_REG_P(X) \ ! 282: (REG_P (X) && REGNO (X) >= 4 && REGNO (X) < FIRST_PSEUDO_REGISTER) ! 283: ! 284: #define FP_REG_P(X) (REG_P (X) && FP_REGNO_P (REGNO (X))) ! 285: #define FP_REGNO_P(n) ((n) >= FIRST_FLOAT_REG && (n) < FIRST_PSEUDO_REGISTER) ! 286: ! 287: /* Try to maintain the accuracy of the death notes for regs satisfying the ! 288: following. Important for stack like regs, to know when to pop. */ ! 289: ! 290: #define PRESERVE_DEATH_INFO_REGNO_P(x) FP_REGNO_P(x) ! 291: ! 292: /* 1 if register REGNO can magically overlap other regs. ! 293: Note that nonzero values work only in very special circumstances. ! 294: We return 1 for an FP reg because "both" our FP regs ! 295: are really the same reg. */ ! 296: ! 297: #define OVERLAPPING_REGNO_P(REGNO) FP_REGNO_P (REGNO) ! 298: ! 299: /* The class value for index registers, and the one for base regs. */ ! 300: ! 301: #define INDEX_REG_CLASS INDEX_REGS ! 302: #define BASE_REG_CLASS GENERAL_REGS ! 303: ! 304: /* Get reg_class from a letter such as appears in the machine description. */ ! 305: ! 306: #define REG_CLASS_FROM_LETTER(C) \ ! 307: ((C) == 'r' ? GENERAL_REGS : \ ! 308: (C) == 'q' ? Q_REGS : \ ! 309: (C) == 'f' ? FLOAT_REGS : \ ! 310: (C) == 'a' ? AREG : (C) == 'b' ? BREG : \ ! 311: (C) == 'c' ? CREG : (C) == 'd' ? DREG : \ ! 312: (C) == 'A' ? ADREG : \ ! 313: (C) == 'S' ? SIREG : \ ! 314: (C) == 'D' ? DIREG : NO_REGS) ! 315: ! 316: /* The letters I, J, K, L and M in a register constraint string ! 317: can be used to stand for particular ranges of immediate operands. ! 318: This macro defines what the ranges are. ! 319: C is the letter, and VALUE is a constant value. ! 320: Return 1 if VALUE is in the range specified by C. ! 321: ! 322: I is for the maximum shifts. ! 323: */ ! 324: ! 325: #define CONST_OK_FOR_LETTER_P(VALUE, C) \ ! 326: ((C) == 'I' ? (VALUE) >= 0 && (VALUE) <= 31 :0) ! 327: ! 328: /* Similar, but for floating constants, and defining letters G and H. ! 329: Here VALUE is the CONST_DOUBLE rtx itself. */ ! 330: ! 331: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \ ! 332: ((C) == 'G' ? ! (TARGET_80387 && standard_80387_constant_p (VALUE)) : 1) ! 333: ! 334: /* Given an rtx X being reloaded into a reg required to be ! 335: in class CLASS, return the class of reg to actually use. ! 336: In general this is just CLASS; but on some machines ! 337: in some cases it is preferable to use a more restrictive class. ! 338: On the 80386 series, we prevent floating constants from being ! 339: reloaded into floating registers (since no move-insn can do that) ! 340: and we ensure that QImodes aren't reloaded into the esi or edi reg. */ ! 341: ! 342: #define PREFERRED_RELOAD_CLASS(X,CLASS) \ ! 343: (GET_CODE (X) == CONST_DOUBLE \ ! 344: ? ((CLASS) == GENERAL_REGS || (CLASS) == ALL_REGS \ ! 345: ? GENERAL_REGS : NO_REGS) \ ! 346: : GET_MODE (X) == QImode \ ! 347: ? ((CLASS) == GENERAL_REGS || (CLASS) == ALL_REGS \ ! 348: ? Q_REGS \ ! 349: : (CLASS) == INDEX_REGS ? (abort (), INDEX_REGS) \ ! 350: : (CLASS)) \ ! 351: : (CLASS)) ! 352: ! 353: /* Return the maximum number of consecutive registers ! 354: needed to represent mode MODE in a register of class CLASS. */ ! 355: /* On the 80386, this is the size of MODE in words, ! 356: except in the FP regs, where a single reg is always enough. */ ! 357: #define CLASS_MAX_NREGS(CLASS, MODE) \ ! 358: ((CLASS) == FLOAT_REGS ? 1 : \ ! 359: ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)) ! 360: ! 361: /* Stack layout; function entry, exit and calling. */ ! 362: ! 363: /* Define this if pushing a word on the stack ! 364: makes the stack pointer a smaller address. */ ! 365: #define STACK_GROWS_DOWNWARD ! 366: ! 367: /* Define this if the nominal address of the stack frame ! 368: is at the high-address end of the local variables; ! 369: that is, each additional local variable allocated ! 370: goes at a more negative offset in the frame. */ ! 371: #define FRAME_GROWS_DOWNWARD ! 372: ! 373: /* Offset within stack frame to start allocating local variables at. ! 374: If FRAME_GROWS_DOWNWARD, this is the offset to the END of the ! 375: first local allocated. Otherwise, it is the offset to the BEGINNING ! 376: of the first local allocated. */ ! 377: #define STARTING_FRAME_OFFSET 0 ! 378: ! 379: /* If we generate an insn to push BYTES bytes, ! 380: this says how many the stack pointer really advances by. ! 381: On 386 pushw decrements by exactly 2 no matter what the position was. ! 382: On the 386 there is no pushb; we use pushw instead, and this ! 383: has the effect of rounding up to 2. */ ! 384: ! 385: #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & (-2)) ! 386: ! 387: /* Offset of first parameter from the argument pointer register value. */ ! 388: #define FIRST_PARM_OFFSET(FNDECL) 8 ! 389: ! 390: /* Value is 1 if returning from a function call automatically ! 391: pops the arguments described by the number-of-args field in the call. ! 392: FUNTYPE is the data type of the function (as a tree), ! 393: or for a library call it is an identifier node for the subroutine name. ! 394: ! 395: On the 80386, the RTD insn may be used to pop them if the number ! 396: of args is fixed, but if the number is variable then the caller ! 397: must pop them all. RTD can't be used for library calls now ! 398: because the library is compiled with the Unix compiler. ! 399: Use of RTD is a selectable option, since it is incompatible with ! 400: standard Unix calling sequences. If the option is not selected, ! 401: the caller must always pop the args. */ ! 402: ! 403: #define RETURN_POPS_ARGS(FUNTYPE) \ ! 404: (TARGET_RTD && TREE_CODE (FUNTYPE) != IDENTIFIER_NODE \ ! 405: && (TYPE_ARG_TYPES (FUNTYPE) == 0 \ ! 406: || TREE_VALUE (tree_last (TYPE_ARG_TYPES (FUNTYPE))) == void_type_node)) ! 407: ! 408: #define FUNCTION_VALUE(VALTYPE, FUNC) \ ! 409: gen_rtx (REG, TYPE_MODE (VALTYPE), \ ! 410: VALUE_REGNO(TYPE_MODE(VALTYPE))) ! 411: ! 412: /* Define how to find the value returned by a library function ! 413: assuming the value has mode MODE. */ ! 414: ! 415: #define LIBCALL_VALUE(MODE) \ ! 416: gen_rtx (REG, MODE, VALUE_REGNO(MODE)) ! 417: ! 418: /* 1 if N is a possible register number for function argument passing. ! 419: On the 80386, no registers are used in this way. ! 420: *NOTE* -mregparm does not work. ! 421: It exists only to test register calling conventions. */ ! 422: ! 423: #define FUNCTION_ARG_REGNO_P(N) 0 ! 424: /* Define a data type for recording info about an argument list ! 425: during the scan of that argument list. This data type should ! 426: hold all necessary information about the function itself ! 427: and about the args processed so far, enough to enable macros ! 428: such as FUNCTION_ARG to determine where the next arg should go. ! 429: ! 430: On the 80386, this is a single integer, which is a number of bytes ! 431: of arguments scanned so far. */ ! 432: ! 433: #define CUMULATIVE_ARGS int ! 434: ! 435: /* Initialize a variable CUM of type CUMULATIVE_ARGS ! 436: for a call to a function whose data type is FNTYPE. ! 437: For a library call, FNTYPE is 0. ! 438: ! 439: On the 80386, the offset starts at 0. */ ! 440: ! 441: #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE) \ ! 442: ((CUM) = 0) ! 443: ! 444: /* Update the data in CUM to advance over an argument ! 445: of mode MODE and data type TYPE. ! 446: (TYPE is null for libcalls where that information may not be available.) */ ! 447: ! 448: #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \ ! 449: ((CUM) += ((MODE) != BLKmode \ ! 450: ? (GET_MODE_SIZE (MODE) + 3) & ~3 \ ! 451: : (int_size_in_bytes (TYPE) + 3) & ~3)) ! 452: ! 453: /* Define where to put the arguments to a function. ! 454: Value is zero to push the argument on the stack, ! 455: or a hard register in which to store the argument. ! 456: ! 457: MODE is the argument's machine mode. ! 458: TYPE is the data type of the argument (as a tree). ! 459: This is null for libcalls where that information may ! 460: not be available. ! 461: CUM is a variable of type CUMULATIVE_ARGS which gives info about ! 462: the preceding args and about the function being called. ! 463: NAMED is nonzero if this argument is a named parameter ! 464: (otherwise it is an extra parameter matching an ellipsis). */ ! 465: ! 466: ! 467: /* On the 80386 all args are pushed, except if -mregparm is specified ! 468: then the first two words of arguments are passed in EAX, EDX. ! 469: *NOTE* -mregparm does not work. ! 470: It exists only to test register calling conventions. */ ! 471: ! 472: #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ ! 473: ((TARGET_REGPARM && (CUM) < 8) ? gen_rtx (REG, (MODE), (CUM) / 4) : 0) ! 474: ! 475: /* For an arg passed partly in registers and partly in memory, ! 476: this is the number of registers used. ! 477: For args passed entirely in registers or entirely in memory, zero. */ ! 478: ! 479: ! 480: #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \ ! 481: ((TARGET_REGPARM && (CUM) < 8 \ ! 482: && 8 < ((CUM) + ((MODE) == BLKmode \ ! 483: ? int_size_in_bytes (TYPE) \ ! 484: : GET_MODE_SIZE (MODE)))) \ ! 485: ? 2 - (CUM) / 4 : 0) ! 486: ! 487: /* This macro generates the assembly code for function entry. ! 488: FILE is a stdio stream to output the code to. ! 489: SIZE is an int: how many units of temporary storage to allocate. ! 490: Refer to the array `regs_ever_live' to determine which registers ! 491: to save; `regs_ever_live[I]' is nonzero if register number I ! 492: is ever used in the function. This macro is responsible for ! 493: knowing which registers should not be saved even if used. */ ! 494: ! 495: #define FUNCTION_PROLOGUE(FILE, SIZE) \ ! 496: function_prologue (FILE, SIZE) ! 497: ! 498: /* Output assembler code to FILE to increment profiler label # LABELNO ! 499: for profiling a function entry. */ ! 500: ! 501: #define FUNCTION_PROFILER(FILE, LABELNO) \ ! 502: fprintf (FILE, "\tmovl $%sP%d,%%edx\n\tcall _mcount\n", LPREFIX, (LABELNO)); ! 503: ! 504: /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, ! 505: the stack pointer does not matter. The value is tested only in ! 506: functions that have frame pointers. ! 507: No definition is equivalent to always zero. */ ! 508: /* Note on the 386 it might be more efficient not to define this since ! 509: we have to restore it ourselves from the frame pointer, in order to ! 510: use pop */ ! 511: ! 512: #define EXIT_IGNORE_STACK 1 ! 513: ! 514: /* This macro generates the assembly code for function exit, ! 515: on machines that need it. If FUNCTION_EPILOGUE is not defined ! 516: then individual return instructions are generated for each ! 517: return statement. Args are same as for FUNCTION_PROLOGUE. ! 518: ! 519: The function epilogue should not depend on the current stack pointer! ! 520: It should use the frame pointer only. This is mandatory because ! 521: of alloca; we also take advantage of it to omit stack adjustments ! 522: before returning. */ ! 523: ! 524: #define FUNCTION_EPILOGUE(FILE, SIZE) \ ! 525: function_epilogue (FILE, SIZE) ! 526: ! 527: /* If the memory address ADDR is relative to the frame pointer, ! 528: correct it to be relative to the stack pointer instead. ! 529: This is for when we don't use a frame pointer. ! 530: ADDR should be a variable name. */ ! 531: ! 532: ! 533: #define FIX_FRAME_POINTER_ADDRESS(ADDR,DEPTH) \ ! 534: { int offset = -1; \ ! 535: rtx regs = stack_pointer_rtx; \ ! 536: if (ADDR == frame_pointer_rtx) \ ! 537: offset = 0; \ ! 538: else if (GET_CODE (ADDR) == PLUS && XEXP (ADDR, 0) == frame_pointer_rtx \ ! 539: && GET_CODE (XEXP (ADDR, 1)) == CONST_INT) \ ! 540: offset = INTVAL (XEXP (ADDR, 1)); \ ! 541: else if (GET_CODE (ADDR) == PLUS && XEXP (ADDR, 0) == frame_pointer_rtx) \ ! 542: { rtx other_reg = XEXP (ADDR, 1); \ ! 543: offset = 0; \ ! 544: regs = gen_rtx (PLUS, Pmode, stack_pointer_rtx, other_reg); } \ ! 545: else if (GET_CODE (ADDR) == PLUS && XEXP (ADDR, 1) == frame_pointer_rtx) \ ! 546: { rtx other_reg = XEXP (ADDR, 0); \ ! 547: offset = 0; \ ! 548: regs = gen_rtx (PLUS, Pmode, stack_pointer_rtx, other_reg); } \ ! 549: else if (GET_CODE (ADDR) == PLUS \ ! 550: && GET_CODE (XEXP (ADDR, 0)) == PLUS \ ! 551: && XEXP (XEXP (ADDR, 0), 0) == frame_pointer_rtx \ ! 552: && GET_CODE (XEXP (ADDR, 1)) == CONST_INT) \ ! 553: { rtx other_reg = XEXP (XEXP (ADDR, 0), 1); \ ! 554: offset = INTVAL (XEXP (ADDR, 1)); \ ! 555: regs = gen_rtx (PLUS, Pmode, stack_pointer_rtx, other_reg); } \ ! 556: else if (GET_CODE (ADDR) == PLUS \ ! 557: && GET_CODE (XEXP (ADDR, 0)) == PLUS \ ! 558: && XEXP (XEXP (ADDR, 0), 1) == frame_pointer_rtx \ ! 559: && GET_CODE (XEXP (ADDR, 1)) == CONST_INT) \ ! 560: { rtx other_reg = XEXP (XEXP (ADDR, 0), 0); \ ! 561: offset = INTVAL (XEXP (ADDR, 1)); \ ! 562: regs = gen_rtx (PLUS, Pmode, stack_pointer_rtx, other_reg); } \ ! 563: if (offset >= 0) \ ! 564: { int regno; \ ! 565: extern char call_used_regs[]; \ ! 566: for (regno = FIRST_FLOAT_REG; regno < FIRST_PSEUDO_REGISTER; regno++)\ ! 567: if (regs_ever_live[regno] && ! call_used_regs[regno]) \ ! 568: offset += 8; \ ! 569: for (regno=0 ; regno <FIRST_FLOAT_REG ; regno++) \ ! 570: if (regs_ever_live[regno] && ! call_used_regs[regno]) \ ! 571: offset += 4; \ ! 572: offset -= 4; \ ! 573: ADDR = plus_constant (regs, offset + (DEPTH)); } } \ ! 574: ! 575: /* Addressing modes, and classification of registers for them. */ ! 576: ! 577: /* #define HAVE_POST_INCREMENT */ ! 578: /* #define HAVE_POST_DECREMENT */ ! 579: ! 580: /* #define HAVE_PRE_DECREMENT */ ! 581: /* #define HAVE_PRE_INCREMENT */ ! 582: ! 583: /* Macros to check register numbers against specific register classes. */ ! 584: ! 585: /* These assume that REGNO is a hard or pseudo reg number. ! 586: They give nonzero only if REGNO is a hard reg of the suitable class ! 587: or a pseudo reg currently allocated to a suitable hard reg. ! 588: Since they use reg_renumber, they are safe only once reg_renumber ! 589: has been allocated, which happens in local-alloc.c. */ ! 590: ! 591: #define REGNO_OK_FOR_INDEX_P(REGNO) \ ! 592: ((REGNO) < STACK_POINTER_REGNUM || (unsigned) reg_renumber[REGNO] < STACK_POINTER_REGNUM) ! 593: #define REGNO_OK_FOR_BASE_P(REGNO) \ ! 594: ((REGNO) <= STACK_POINTER_REGNUM || (unsigned) reg_renumber[REGNO] <= STACK_POINTER_REGNUM) ! 595: ! 596: #define REGNO_OK_FOR_SIREG_P(REGNO) ((REGNO) == 4 || reg_renumber[REGNO] == 4) ! 597: #define REGNO_OK_FOR_DIREG_P(REGNO) ((REGNO) == 5 || reg_renumber[REGNO] == 5) ! 598: ! 599: /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx ! 600: and check its validity for a certain class. ! 601: We have two alternate definitions for each of them. ! 602: The usual definition accepts all pseudo regs; the other rejects ! 603: them unless they have been allocated suitable hard regs. ! 604: The symbol REG_OK_STRICT causes the latter definition to be used. ! 605: ! 606: Most source files want to accept pseudo regs in the hope that ! 607: they will get allocated to the class that the insn wants them to be in. ! 608: Source files for reload pass need to be strict. ! 609: After reload, it makes no difference, since pseudo regs have ! 610: been eliminated by then. */ ! 611: ! 612: #ifndef REG_OK_STRICT ! 613: ! 614: /* Nonzero if X is a hard reg that can be used as an index or if ! 615: it is a pseudo reg. */ ! 616: #define REG_OK_FOR_INDEX_P(X) (REGNO (X) < STACK_POINTER_REGNUM || REGNO (X) >= FIRST_PSEUDO_REGISTER) ! 617: /* Nonzero if X is a hard reg that can be used as a base reg ! 618: of if it is a pseudo reg. */ ! 619: /* ?wfs */ ! 620: #define REG_OK_FOR_BASE_P(X) (REGNO (X) <= STACK_POINTER_REGNUM || REGNO(X) >= FIRST_PSEUDO_REGISTER) ! 621: #define REG_OK_FOR_STRREG_P(X) \ ! 622: (REGNO (X) == 4 || REGNO (X) == 5 || REGNO (X) >= FIRST_PSEUDO_REGISTER) ! 623: ! 624: #else ! 625: ! 626: /* Nonzero if X is a hard reg that can be used as an index. */ ! 627: #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X)) ! 628: /* Nonzero if X is a hard reg that can be used as a base reg. */ ! 629: #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) ! 630: #define REG_OK_FOR_STRREG_P(X) \ ! 631: (REGNO_OK_FOR_DIREG_P (REGNO (X)) || REGNO_OK_FOR_SIREG_P (REGNO (X))) ! 632: ! 633: #endif ! 634: ! 635: /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression ! 636: that is a valid memory address for an instruction. ! 637: The MODE argument is the machine mode for the MEM expression ! 638: that wants to use this address. ! 639: ! 640: The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS, ! 641: except for CONSTANT_ADDRESS_P which is usually machine-independent. */ ! 642: ! 643: #define MAX_REGS_PER_ADDRESS 2 ! 644: ! 645: #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X) ! 646: ! 647: /* Nonzero if the constant value X is a legitimate general operand. ! 648: It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */ ! 649: ! 650: #define LEGITIMATE_CONSTANT_P(X) 1 ! 651: ! 652: #define GO_IF_INDEXABLE_BASE(X, ADDR) \ ! 653: if (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X)) goto ADDR ! 654: ! 655: #define LEGITIMATE_INDEX_REG_P(X) \ ! 656: (GET_CODE (X) == REG && REG_OK_FOR_INDEX_P (X)) ! 657: ! 658: /* Return 1 if X is an index or an index times a scale. */ ! 659: ! 660: #define LEGITIMATE_INDEX_P(X) \ ! 661: (LEGITIMATE_INDEX_REG_P (X) \ ! 662: || (GET_CODE (X) == MULT \ ! 663: && LEGITIMATE_INDEX_REG_P (XEXP (X, 0)) \ ! 664: && GET_CODE (XEXP (X, 1)) == CONST_INT \ ! 665: && (INTVAL (XEXP (X, 1)) == 2 \ ! 666: || INTVAL (XEXP (X, 1)) == 4 \ ! 667: || INTVAL (XEXP (X, 1)) == 8))) ! 668: ! 669: /* Go to ADDR if X is an index term, a base reg, or a sum of those. */ ! 670: ! 671: #define GO_IF_INDEXING(X, ADDR) \ ! 672: { if (LEGITIMATE_INDEX_P (X)) goto ADDR; \ ! 673: GO_IF_INDEXABLE_BASE (X, ADDR); \ ! 674: if (GET_CODE (X) == PLUS && LEGITIMATE_INDEX_P (XEXP (X, 0))) \ ! 675: { GO_IF_INDEXABLE_BASE (XEXP (X, 1), ADDR); } \ ! 676: if (GET_CODE (X) == PLUS && LEGITIMATE_INDEX_P (XEXP (X, 1))) \ ! 677: { GO_IF_INDEXABLE_BASE (XEXP (X, 0), ADDR); } } ! 678: ! 679: /* We used to allow this, but it isn't ever used. ! 680: || ((GET_CODE (X) == POST_DEC || GET_CODE (X) == POST_INC) \ ! 681: && REG_P (XEXP (X, 0)) \ ! 682: && REG_OK_FOR_STRREG_P (XEXP (X, 0))) \ ! 683: */ ! 684: ! 685: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \ ! 686: { if (CONSTANT_ADDRESS_P (X)) goto ADDR; \ ! 687: GO_IF_INDEXING (X, ADDR); \ ! 688: if (GET_CODE (X) == PLUS) \ ! 689: { if (CONSTANT_ADDRESS_P (XEXP (X, 1))) \ ! 690: GO_IF_INDEXING (XEXP (X, 0), ADDR); \ ! 691: if (CONSTANT_ADDRESS_P (XEXP (X, 0))) \ ! 692: GO_IF_INDEXING (XEXP (X, 1), ADDR); } } ! 693: ! 694: /* Try machine-dependent ways of modifying an illegitimate address ! 695: to be legitimate. If we find one, return the new, valid address. ! 696: This macro is used in only one place: `memory_address' in explow.c. ! 697: ! 698: OLDX is the address as it was before break_out_memory_refs was called. ! 699: In some cases it is useful to look at this to decide what needs to be done. ! 700: ! 701: MODE and WIN are passed so that this macro can use ! 702: GO_IF_LEGITIMATE_ADDRESS. ! 703: ! 704: It is always safe for this macro to do nothing. It exists to recognize ! 705: opportunities to optimize the output. ! 706: ! 707: For the 80386, we handle X+REG by loading X into a register R and ! 708: using R+REG. R will go in a general reg and indexing will be used. ! 709: However, if REG is a broken-out memory address or multiplication, ! 710: nothing needs to be done because REG can certainly go in a general reg. */ ! 711: ! 712: #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) \ ! 713: { register int ch = (X) != (OLDX); \ ! 714: if (GET_CODE (X) == PLUS) \ ! 715: { if (GET_CODE (XEXP (X, 0)) == MULT) \ ! 716: ch = 1, XEXP (X, 0) = force_operand (XEXP (X, 0), 0); \ ! 717: if (GET_CODE (XEXP (X, 1)) == MULT) \ ! 718: ch = 1, XEXP (X, 1) = force_operand (XEXP (X, 1), 0); \ ! 719: if (ch && GET_CODE (XEXP (X, 1)) == REG \ ! 720: && GET_CODE (XEXP (X, 0)) == REG) \ ! 721: return X; \ ! 722: if (ch) { GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN); } \ ! 723: if (GET_CODE (XEXP (X, 0)) == REG \ ! 724: || (GET_CODE (XEXP (X, 0)) == SIGN_EXTEND \ ! 725: && GET_CODE (XEXP (XEXP (X, 0), 0)) == REG \ ! 726: && GET_MODE (XEXP (XEXP (X, 0), 0)) == HImode)) \ ! 727: { register rtx temp = gen_reg_rtx (Pmode); \ ! 728: register rtx val = force_operand (XEXP (X, 1), temp); \ ! 729: if (val != temp) emit_move_insn (temp, val, 0); \ ! 730: XEXP (X, 1) = temp; \ ! 731: return X; } \ ! 732: else if (GET_CODE (XEXP (X, 1)) == REG \ ! 733: || (GET_CODE (XEXP (X, 1)) == SIGN_EXTEND \ ! 734: && GET_CODE (XEXP (XEXP (X, 1), 0)) == REG \ ! 735: && GET_MODE (XEXP (XEXP (X, 1), 0)) == HImode)) \ ! 736: { register rtx temp = gen_reg_rtx (Pmode); \ ! 737: register rtx val = force_operand (XEXP (X, 0), temp); \ ! 738: if (val != temp) emit_move_insn (temp, val, 0); \ ! 739: XEXP (X, 0) = temp; \ ! 740: return X; }}} ! 741: ! 742: /* Go to LABEL if ADDR (a legitimate address expression) ! 743: has an effect that depends on the machine mode it is used for. ! 744: On the 80386, only postdecrement and postincrement address depend thus ! 745: (the amount of decrement or increment being the length of the operand). */ ! 746: #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \ ! 747: if (GET_CODE (ADDR) == POST_INC || GET_CODE (ADDR) == POST_DEC) goto LABEL ! 748: ! 749: /* Specify the machine mode that this machine uses ! 750: for the index in the tablejump instruction. */ ! 751: #define CASE_VECTOR_MODE Pmode ! 752: ! 753: /* Define this if the tablejump instruction expects the table ! 754: to contain offsets from the address of the table. ! 755: Do not define this if the table should contain absolute addresses. */ ! 756: /* #define CASE_VECTOR_PC_RELATIVE */ ! 757: ! 758: /* Specify the tree operation to be used to convert reals to integers. ! 759: This should be changed to take advantage of fist --wfs ?? ! 760: */ ! 761: #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR ! 762: ! 763: /* This is the kind of divide that is easiest to do in the general case. */ ! 764: #define EASY_DIV_EXPR TRUNC_DIV_EXPR ! 765: ! 766: /* Define this as 1 if `char' should by default be signed; else as 0. */ ! 767: #define DEFAULT_SIGNED_CHAR 1 ! 768: ! 769: /* Max number of bytes we can move from memory to memory ! 770: in one reasonably fast instruction. */ ! 771: #define MOVE_MAX 4 ! 772: ! 773: /* Define this if zero-extension is slow (more than one real instruction). */ ! 774: /* #define SLOW_ZERO_EXTEND */ ! 775: ! 776: /* Nonzero if access to memory by bytes is slow and undesirable. */ ! 777: #define SLOW_BYTE_ACCESS 0 ! 778: ! 779: /* Define if shifts truncate the shift count ! 780: which implies one can omit a sign-extension or zero-extension ! 781: of a shift count. */ ! 782: #define SHIFT_COUNT_TRUNCATED ! 783: ! 784: /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits ! 785: is done just by pretending it is already truncated. */ ! 786: #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 ! 787: ! 788: /* We assume that the store-condition-codes instructions store 0 for false ! 789: and some other value for true. This is the value stored for true. */ ! 790: ! 791: #define STORE_FLAG_VALUE 1 ! 792: ! 793: /* When a prototype says `char' or `short', really pass an `int'. ! 794: (The 386 can't easily push less than an int.) */ ! 795: ! 796: #define PROMOTE_PROTOTYPES ! 797: ! 798: /* Specify the machine mode that pointers have. ! 799: After generation of rtl, the compiler makes no further distinction ! 800: between pointers and any other objects of this machine mode. */ ! 801: #define Pmode SImode ! 802: ! 803: /* A function address in a call instruction ! 804: is a byte address (for indexing purposes) ! 805: so give the MEM rtx a byte's mode. */ ! 806: #define FUNCTION_MODE QImode ! 807: ! 808: /* Define this if addresses of constant functions ! 809: shouldn't be put through pseudo regs where they can be cse'd. ! 810: Desirable on the 386 because a CALL with a constant address is ! 811: not much slower than one with a register address. */ ! 812: #define NO_FUNCTION_CSE ! 813: ! 814: /* Compute the cost of computing a constant rtl expression RTX ! 815: whose rtx-code is CODE. The body of this macro is a portion ! 816: of a switch statement. If the code is computed here, ! 817: return it with a return statement. Otherwise, break from the switch. */ ! 818: ! 819: #define CONST_COSTS(RTX,CODE) \ ! 820: case CONST_INT: \ ! 821: if (RTX == const0_rtx) return 0; \ ! 822: if ((unsigned) INTVAL (RTX) < 077) return 1; \ ! 823: case CONST: \ ! 824: case LABEL_REF: \ ! 825: case SYMBOL_REF: \ ! 826: return 3; \ ! 827: case CONST_DOUBLE: \ ! 828: return 5; \ ! 829: case PLUS: \ ! 830: if (GET_CODE (XEXP (RTX, 0)) == REG \ ! 831: && GET_CODE (XEXP (RTX, 1)) == CONST_INT) \ ! 832: return 2; ! 833: ! 834: /* Tell final.c how to eliminate redundant test instructions. */ ! 835: ! 836: /* ??? Find a better place to put this. */ ! 837: #if 0 ! 838: #define FINAL_PRESCAN_INSN(INSN, OPERANDS, NOPERANDS) \ ! 839: fp_hook (INSN, OPERANDS, NOPERANDS) ! 840: #endif ! 841: ! 842: /* Here we define machine-dependent flags and fields in cc_status ! 843: (see `conditions.h'). */ ! 844: ! 845: /* Set if the cc value is actually in the 80387, so a floating point ! 846: conditional branch must be output. */ ! 847: #define CC_IN_80387 04000 ! 848: ! 849: /* Store in cc_status the expressions ! 850: that the condition codes will describe ! 851: after execution of an instruction whose pattern is EXP. ! 852: Do not alter them if the instruction would not alter the cc's. */ ! 853: ! 854: #define NOTICE_UPDATE_CC(EXP, INSN) \ ! 855: notice_update_cc((EXP)) ! 856: ! 857: /* Output a signed jump insn. Use template NORMAL ordinarily, or ! 858: FLOAT following a floating point comparison. ! 859: Use NO_OV following an arithmetic insn that set the cc's ! 860: before a test insn that was deleted. ! 861: NO_OV may be zero, meaning final should reinsert the test insn ! 862: because the jump cannot be handled properly without it. */ ! 863: ! 864: #define OUTPUT_JUMP(NORMAL, FLOAT, NO_OV) \ ! 865: { \ ! 866: if (cc_status.flags & CC_IN_80387) \ ! 867: return FLOAT; \ ! 868: if (cc_status.flags & CC_NO_OVERFLOW) \ ! 869: return NO_OV; \ ! 870: return NORMAL; \ ! 871: } ! 872: ! 873: /* Control the assembler format that we output. */ ! 874: ! 875: #ifdef ATT ! 876: #include <syms.h> ! 877: #else ! 878: #define FILNMLEN 14 ! 879: #endif ! 880: ! 881: /* How to refer to registers in assembler output. ! 882: This sequence is indexed by compiler's hard-register-number (see above). */ ! 883: ! 884: /* In order to refer to the first 8 regs as 32 bit regs prefix an "e" ! 885: For non floating point regs, the following are the HImode names. ! 886: */ ! 887: ! 888: ! 889: #define HI_REGISTER_NAMES \ ! 890: {"ax","dx","cx","bx","si","di","bp","sp", \ ! 891: "st","st(1)"} ! 892: /* ,"st(2)","st(3)","st(4)","st(5)" } */ ! 893: #define REGISTER_NAMES HI_REGISTER_NAMES ! 894: ! 895: /* Note we are omitting these since currently I don't know how ! 896: to get gcc to use these, since they want the same but different ! 897: number as al, and ax. ! 898: */ ! 899: ! 900: /* note the last four are not really qi_registsers, but ! 901: the md will have to never output movb into one of them ! 902: only a movw . There is no movb into the hardware reg ! 903: esi that I can find */ ! 904: ! 905: #define QI_REGISTER_NAMES \ ! 906: {"al", "dl", "cl", "bl", "si", "di", "bp", "sp",} ! 907: ! 908: /* ! 909: Don't know how to use these, yet. They overlap with ax,dx,cx,bx ! 910: and so would clobber al,dl,cl,bl ! 911: #define QI_REGISTER_NAMES_TOP \ ! 912: {"ah", \ ! 913: "dh", \ ! 914: "ch", \ ! 915: "bh", } ! 916: */ ! 917: ! 918: /* How to renumber registers for dbxand gdb. */ ! 919: ! 920: /* {0,2,1,3,6,7,4,5,12,13,14,15,16,17} */ ! 921: #define DBX_REGISTER_NUMBER(n) \ ! 922: ((n)==0?0 :(n)==1?2 :(n)==2?1 :(n)==3?3 :(n)==4?6 :(n)==5?7 :(n)==6?4 :(n)==7?5 :(n)==8?12 :(n)==9?12 :(n)) ! 923: ! 924: /* This is how to output the definition of a user-level label named NAME, ! 925: such as the label on a static function or variable NAME. */ ! 926: ! 927: #define ASM_OUTPUT_LABEL(FILE,NAME) \ ! 928: (assemble_name (FILE, NAME), fputs (":\n", FILE)) ! 929: ! 930: /* This is how to output an assembler line defining a `double' constant. */ ! 931: ! 932: #define ASM_OUTPUT_DOUBLE(FILE,VALUE) \ ! 933: fprintf (FILE, "%s%.22e\n",ASM_DOUBLE, (VALUE)) ! 934: ! 935: ! 936: /* This is how to output an assembler line defining a `float' constant. */ ! 937: ! 938: #define ASM_OUTPUT_FLOAT(FILE,VALUE) \ ! 939: do { union { float f; long l;} tem; \ ! 940: tem.f = (VALUE); \ ! 941: fputs(ASM_LONG,FILE); \ ! 942: fprintf((FILE), "0x%x\n", tem.l); \ ! 943: } while (0) ! 944: ! 945: ! 946: /* Store in OUTPUT a string (made with alloca) containing ! 947: an assembler-name for a local static variable named NAME. ! 948: LABELNO is an integer which is different for each call. */ ! 949: ! 950: #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \ ! 951: ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \ ! 952: sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO))) ! 953: ! 954: ! 955: ! 956: /* This is how to output an assembler line defining an `int' constant. */ ! 957: ! 958: #define ASM_OUTPUT_INT(FILE,VALUE) \ ! 959: ( fprintf (FILE,ASM_LONG), \ ! 960: output_addr_const (FILE,(VALUE)), \ ! 961: putc('\n',FILE)) ! 962: ! 963: /* Likewise for `char' and `short' constants. */ ! 964: /* is this supposed to do align too?? */ ! 965: ! 966: #define ASM_OUTPUT_SHORT(FILE,VALUE) \ ! 967: ( fprintf (FILE,ASM_SHORT), \ ! 968: output_addr_const (FILE,(VALUE)), \ ! 969: putc('\n',FILE)) ! 970: ! 971: /* ! 972: #define ASM_OUTPUT_SHORT(FILE,VALUE) \ ! 973: ( fputs (ASM_BYTE,FILE), \ ! 974: output_addr_const (FILE,(VALUE)), \ ! 975: fputs ( ",",FILE), \ ! 976: output_addr_const (FILE,(VALUE)), \ ! 977: fputs (" >> 8\n",FILE)) ! 978: */ ! 979: ! 980: ! 981: #define ASM_OUTPUT_CHAR(FILE,VALUE) \ ! 982: ( fprintf (FILE, ASM_BYTE), \ ! 983: output_addr_const (FILE,(VALUE)), \ ! 984: putc('\n',FILE)) ! 985: ! 986: /* This is how to output an assembler line for a numeric constant byte. */ ! 987: ! 988: #define ASM_OUTPUT_BYTE(FILE,VALUE) \ ! 989: fprintf ((FILE), "%s0x%x\n", ASM_BYTE, (VALUE)) ! 990: ! 991: /* This is how to output an insn to push a register on the stack. ! 992: It need not be very fast code. */ ! 993: ! 994: #define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \ ! 995: fprintf (FILE, "\tpushl e%s\n", reg_names[REGNO]) ! 996: ! 997: /* This is how to output an insn to pop a register from the stack. ! 998: It need not be very fast code. */ ! 999: ! 1000: #define ASM_OUTPUT_REG_POP(FILE,REGNO) \ ! 1001: fprintf (FILE, "\tpopl e%s\n", reg_names[REGNO]) ! 1002: ! 1003: /* This is how to output an element of a case-vector that is absolute. ! 1004: */ ! 1005: ! 1006: #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ ! 1007: fprintf (FILE, "%s%s%d\n",ASM_LONG,LPREFIX, VALUE) ! 1008: ! 1009: /* This is how to output an element of a case-vector that is relative. ! 1010: We don't use these on the 386 yet, because the ATT assembler can't do ! 1011: forward reference the differences. ! 1012: */ ! 1013: ! 1014: #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL) abort(); \ ! 1015: fprintf (FILE, "\t.word %s%d-%s%d\n",LPREFIX, VALUE,LPREFIX, REL) ! 1016: ! 1017: /* Define the parentheses used to group arithmetic operations ! 1018: in assembler code. */ ! 1019: ! 1020: #define ASM_OPEN_PAREN "" ! 1021: #define ASM_CLOSE_PAREN "" ! 1022: ! 1023: /* Define results of standard character escape sequences. */ ! 1024: #define TARGET_BELL 007 ! 1025: #define TARGET_BS 010 ! 1026: #define TARGET_TAB 011 ! 1027: #define TARGET_NEWLINE 012 ! 1028: #define TARGET_VT 013 ! 1029: #define TARGET_FF 014 ! 1030: #define TARGET_CR 015 ! 1031: ! 1032: /* Print operand X (an rtx) in assembler syntax to file FILE. ! 1033: CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified. ! 1034: The CODE z takes the size of operand from the following digit, and ! 1035: outputs b,w,or l respectively. ! 1036: ! 1037: On the 80386, we use several such letters: ! 1038: f -- float insn (print a CONST_DOUBLE as a float rather than in hex). ! 1039: L,W,B,Q,S -- print the opcode suffix for specified size of operand. ! 1040: R -- print the prefix for register names. ! 1041: z -- print the opcode suffix for the size of the current operand. ! 1042: * -- print a star (in certain assembler syntax) ! 1043: w -- print the operand as if it's a "word" (HImode) even if it isn't. ! 1044: c -- don't print special prefixes before constant operands. */ ! 1045: ! 1046: #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \ ! 1047: ((CODE) == '*') ! 1048: ! 1049: #define PRINT_OPERAND(FILE, X, CODE) \ ! 1050: print_operand (FILE, X, CODE) ! 1051: ! 1052: ! 1053: #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \ ! 1054: print_operand_address (FILE, ADDR) ! 1055: ! 1056: /* Routines in gnulib that return floats must return them in an fp reg, ! 1057: just as other functions do which return such values. ! 1058: These macros make that happen. */ ! 1059: ! 1060: #define SFVALUE float ! 1061: #define INTIFY(FLOATVAL) FLOATVAL ! 1062: ! 1063: /* Nonzero if INSN magically clobbers register REGNO. */ ! 1064: ! 1065: #define INSN_CLOBBERS_REGNO_P(INSN, REGNO) \ ! 1066: (FP_REGNO_P (REGNO) \ ! 1067: && (GET_CODE (INSN) == JUMP_INSN || GET_CODE (INSN) == BARRIER)) ! 1068: ! 1069: /* a letter which is not needed by the normal asm syntax, which ! 1070: we can use for operand syntax in the extended asm */ ! 1071: ! 1072: #define ASM_OPERAND_LETTER '#' ! 1073: ! 1074: ! 1075: /* ! 1076: Local variables: ! 1077: version-control: t ! 1078: End: ! 1079: */
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