![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to rs6000.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [GCC 2.x] / gcc / config / rs6000|
Return to rs6000.h CVS log | Up to [GCC 2.x] / gcc / config / rs6000 |
1.1 root 1: /* Definitions of target machine for GNU compiler, for IBM RS/6000. 1.1.1.2 ! root 2: Copyright (C) 1992, 1993 Free Software Foundation, Inc. 1.1 root 3: Contributed by Richard Kenner ([email protected]) 4: 5: This file is part of GNU CC. 6: 7: GNU CC is free software; you can redistribute it and/or modify 8: it under the terms of the GNU General Public License as published by 9: the Free Software Foundation; either version 2, or (at your option) 10: any later version. 11: 12: GNU CC is distributed in the hope that it will be useful, 13: but WITHOUT ANY WARRANTY; without even the implied warranty of 14: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15: GNU General Public License for more details. 16: 17: You should have received a copy of the GNU General Public License 18: along with GNU CC; see the file COPYING. If not, write to 19: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ 20: 21: 22: /* Note that some other tm.h files include this one and then override 23: many of the definitions that relate to assembler syntax. */ 24: 25: 26: /* Names to predefine in the preprocessor for this target machine. */ 27: 1.1.1.2 ! root 28: #define CPP_PREDEFINES "-D_IBMR2 -D_AIX -D_AIX32 -Asystem(unix) -Asystem(aix) -Acpu(rs6000) -Amachine(rs6000)" 1.1 root 29: 30: /* Print subsidiary information on the compiler version in use. */ 31: #define TARGET_VERSION ; 32: 33: /* Tell the assembler to assume that all undefined names are external. 34: 35: Don't do this until the fixed IBM assembler is more generally available. 36: When this becomes permanently defined, the ASM_OUTPUT_EXTERNAL, 37: ASM_OUTPUT_EXTERNAL_LIBCALL, and RS6000_OUTPUT_BASENAME macros will no 38: longer be needed. Also, the extern declaration of mcount in ASM_FILE_START 39: will no longer be needed. */ 40: 41: /* #define ASM_SPEC "-u" */ 42: 43: /* Define the options for the binder: Start text at 512, align all segments 44: to 512 bytes, and warn if there is text relocation. 45: 46: The -bhalt:4 option supposedly changes the level at which ld will abort, 47: but it also suppresses warnings about multiply defined symbols and is 48: used by the AIX cc command. So we use it here. 49: 50: -bnodelcsect undoes a poor choice of default relating to multiply-defined 51: csects. See AIX documentation for more information about this. */ 52: 1.1.1.2 ! root 53: #define LINK_SPEC "-T512 -H512 %{!r:-btextro} -bhalt:4 -bnodelcsect\ ! 54: %{static:-bnso -bI:/lib/syscalls.exp} %{g*:-bexport:/usr/lib/libg.exp}" 1.1 root 55: 56: /* Profiled library versions are used by linking with special directories. */ 57: #define LIB_SPEC "%{pg:-L/lib/profiled -L/usr/lib/profiled}\ 58: %{p:-L/lib/profiled -L/usr/lib/profiled} %{g*:-lg} -lc" 59: 60: /* gcc must do the search itself to find libgcc.a, not use -l. */ 61: #define LINK_LIBGCC_SPECIAL_1 62: 63: /* Don't turn -B into -L if the argument specifies a relative file name. */ 64: #define RELATIVE_PREFIX_NOT_LINKDIR 65: 1.1.1.2 ! root 66: /* Architecture type. */ 1.1 root 67: 1.1.1.2 ! root 68: extern int target_flags; 1.1 root 69: 1.1.1.2 ! root 70: /* Use POWER architecture instructions and MQ register. */ ! 71: #define MASK_POWER 0x01 1.1 root 72: 1.1.1.2 ! root 73: /* Use POWER2 extensions to POWER architecture. */ ! 74: #define MASK_POWER2 0x02 ! 75: ! 76: /* Use PowerPC architecture instructions. */ ! 77: #define MASK_POWERPC 0x04 ! 78: ! 79: /* Use PowerPC square root instructions. */ ! 80: #define MASK_POWERPCSQR 0x08 ! 81: ! 82: /* Use PowerPC-64 architecture instructions. */ ! 83: #define MASK_POWERPC64 0x10 ! 84: ! 85: /* Use revised mnemonic names defined for PowerPC architecture. */ ! 86: #define MASK_NEW_MNEMONICS 0x20 ! 87: ! 88: /* Disable placing fp constants in the TOC; can be turned on when the ! 89: TOC overflows. */ ! 90: #define MASK_NO_FP_IN_TOC 0x40 ! 91: ! 92: /* Output only one TOC entry per module. Normally linking fails if ! 93: there are more than 16K unique variables/constants in an executable. With ! 94: this option, linking fails only if there are more than 16K modules, or ! 95: if there are more than 16K unique variables/constant in a single module. 1.1 root 96: 1.1.1.2 ! root 97: This is at the cost of having 2 extra loads and one extra store per ! 98: function, and one less allocatable register. */ ! 99: #define MASK_MINIMAL_TOC 0x80 ! 100: ! 101: #define TARGET_POWER (target_flags & MASK_POWER) ! 102: #define TARGET_POWER2 (target_flags & MASK_POWER2) ! 103: #define TARGET_POWERPC (target_flags & MASK_POWERPC) ! 104: #define TARGET_POWERPCSQR (target_flags & MASK_POWERPCSQR) ! 105: #define TARGET_POWERPC64 (target_flags & MASK_POWERPC64) ! 106: #define TARGET_NEW_MNEMONICS (target_flags & MASK_NEW_MNEMONICS) ! 107: #define TARGET_NO_FP_IN_TOC (target_flags & MASK_NO_FP_IN_TOC) ! 108: #define TARGET_MINIMAL_TOC (target_flags & MASK_MINIMAL_TOC) ! 109: ! 110: /* Run-time compilation parameters selecting different hardware subsets. ! 111: ! 112: Macro to define tables used to set the flags. 1.1 root 113: This is a list in braces of pairs in braces, 114: each pair being { "NAME", VALUE } 115: where VALUE is the bits to set or minus the bits to clear. 116: An empty string NAME is used to identify the default VALUE. */ 117: 1.1.1.2 ! root 118: #define TARGET_SWITCHES \ ! 119: {{"power", MASK_POWER}, \ ! 120: {"power2", MASK_POWER | MASK_POWER2}, \ ! 121: {"no-power2", - MASK_POWER2}, \ ! 122: {"no-power", - (MASK_POWER | MASK_POWER2)}, \ ! 123: {"powerpc", MASK_POWERPC}, \ ! 124: {"no-powerpc", - (MASK_POWERPC | MASK_POWERPCSQR | MASK_POWERPC64)}, \ ! 125: {"powerpc-sqr", MASK_POWERPC | MASK_POWERPCSQR}, \ ! 126: {"no-powerpc-sqr", - MASK_POWERPCSQR}, \ ! 127: {"powerpc64", MASK_POWERPC | MASK_POWERPC64}, \ ! 128: {"no-powerpc64", -MASK_POWERPC64}, \ ! 129: {"new-mnemonics", MASK_NEW_MNEMONICS}, \ ! 130: {"old-mnemonics", -MASK_NEW_MNEMONICS}, \ ! 131: {"normal-toc", - (MASK_NO_FP_IN_TOC | MASK_MINIMAL_TOC)}, \ ! 132: {"fp-in-toc", - MASK_NO_FP_IN_TOC}, \ ! 133: {"no-fp-in-toc", MASK_NO_FP_IN_TOC}, \ ! 134: {"minimal-toc", MASK_MINIMAL_TOC}, \ ! 135: {"no-minimal-toc", - MASK_MINIMAL_TOC}, \ ! 136: {"", TARGET_DEFAULT}} ! 137: ! 138: #define TARGET_DEFAULT MASK_POWER ! 139: ! 140: /* Processor type. */ ! 141: enum processor_type ! 142: {PROCESSOR_RIOS1, ! 143: PROCESSOR_RIOS2, ! 144: PROCESSOR_PPC601, ! 145: PROCESSOR_PPC603, ! 146: PROCESSOR_PPC604, ! 147: PROCESSOR_PPC620}; ! 148: ! 149: extern enum processor_type rs6000_cpu; ! 150: ! 151: /* Recast the processor type to the cpu attribute. */ ! 152: #define rs6000_cpu_attr ((enum attr_cpu)rs6000_cpu) ! 153: ! 154: /* Define the default processor. This is overridden by other tm.h files. */ ! 155: #define PROCESSOR_DEFAULT PROCESSOR_RIOS1 ! 156: ! 157: /* Specify the dialect of assembler to use. New mnemonics is dialect one ! 158: and the old mnemonics are dialect zero. */ ! 159: #define ASSEMBLER_DIALECT TARGET_NEW_MNEMONICS ? 1 : 0 ! 160: ! 161: /* This macro is similar to `TARGET_SWITCHES' but defines names of ! 162: command options that have values. Its definition is an ! 163: initializer with a subgrouping for each command option. ! 164: ! 165: Each subgrouping contains a string constant, that defines the ! 166: fixed part of the option name, and the address of a variable. ! 167: The variable, type `char *', is set to the variable part of the ! 168: given option if the fixed part matches. The actual option name ! 169: is made by appending `-m' to the specified name. ! 170: ! 171: Here is an example which defines `-mshort-data-NUMBER'. If the ! 172: given option is `-mshort-data-512', the variable `m88k_short_data' ! 173: will be set to the string `"512"'. ! 174: ! 175: extern char *m88k_short_data; ! 176: #define TARGET_OPTIONS { { "short-data-", &m88k_short_data } } */ ! 177: ! 178: #define TARGET_OPTIONS \ ! 179: { {"cpu=", &rs6000_cpu_string}} ! 180: ! 181: extern char *rs6000_cpu_string; ! 182: ! 183: /* Sometimes certain combinations of command options do not make sense ! 184: on a particular target machine. You can define a macro ! 185: `OVERRIDE_OPTIONS' to take account of this. This macro, if ! 186: defined, is executed once just after all the command options have ! 187: been parsed. 1.1 root 188: 1.1.1.2 ! root 189: On the RS/6000 this is used to define the target cpu type. */ 1.1 root 190: 1.1.1.2 ! root 191: #define OVERRIDE_OPTIONS rs6000_override_options () 1.1 root 192: 193: #define OPTIMIZATION_OPTIONS(LEVEL) \ 194: { \ 195: if ((LEVEL) > 0) \ 196: { \ 197: flag_force_mem = 1; \ 198: flag_omit_frame_pointer = 1; \ 199: } \ 200: } 201: 202: /* target machine storage layout */ 203: 204: /* Define this macro if it is advisable to hold scalars in registers 205: in a wider mode than that declared by the program. In such cases, 206: the value is constrained to be within the bounds of the declared 207: type, but kept valid in the wider mode. The signedness of the 208: extension may differ from that of the type. */ 209: 210: #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ 211: if (GET_MODE_CLASS (MODE) == MODE_INT \ 212: && GET_MODE_SIZE (MODE) < 4) \ 213: (MODE) = SImode; 214: 215: /* Define this if most significant bit is lowest numbered 216: in instructions that operate on numbered bit-fields. */ 217: /* That is true on RS/6000. */ 218: #define BITS_BIG_ENDIAN 1 219: 220: /* Define this if most significant byte of a word is the lowest numbered. */ 221: /* That is true on RS/6000. */ 222: #define BYTES_BIG_ENDIAN 1 223: 224: /* Define this if most significant word of a multiword number is lowest 225: numbered. 226: 227: For RS/6000 we can decide arbitrarily since there are no machine 228: instructions for them. Might as well be consistent with bits and bytes. */ 229: #define WORDS_BIG_ENDIAN 1 230: 231: /* number of bits in an addressable storage unit */ 232: #define BITS_PER_UNIT 8 233: 234: /* Width in bits of a "word", which is the contents of a machine register. 235: Note that this is not necessarily the width of data type `int'; 236: if using 16-bit ints on a 68000, this would still be 32. 237: But on a machine with 16-bit registers, this would be 16. */ 238: #define BITS_PER_WORD 32 239: 240: /* Width of a word, in units (bytes). */ 241: #define UNITS_PER_WORD 4 242: 243: /* Type used for ptrdiff_t, as a string used in a declaration. */ 244: #define PTRDIFF_TYPE "int" 245: 246: /* Type used for wchar_t, as a string used in a declaration. */ 247: #define WCHAR_TYPE "short unsigned int" 248: 249: /* Width of wchar_t in bits. */ 250: #define WCHAR_TYPE_SIZE 16 251: 252: /* Width in bits of a pointer. 253: See also the macro `Pmode' defined below. */ 254: #define POINTER_SIZE 32 255: 256: /* Allocation boundary (in *bits*) for storing arguments in argument list. */ 257: #define PARM_BOUNDARY 32 258: 259: /* Boundary (in *bits*) on which stack pointer should be aligned. */ 260: #define STACK_BOUNDARY 64 261: 262: /* Allocation boundary (in *bits*) for the code of a function. */ 263: #define FUNCTION_BOUNDARY 32 264: 265: /* No data type wants to be aligned rounder than this. */ 266: #define BIGGEST_ALIGNMENT 32 267: 268: /* Alignment of field after `int : 0' in a structure. */ 269: #define EMPTY_FIELD_BOUNDARY 32 270: 271: /* Every structure's size must be a multiple of this. */ 272: #define STRUCTURE_SIZE_BOUNDARY 8 273: 274: /* A bitfield declared as `int' forces `int' alignment for the struct. */ 275: #define PCC_BITFIELD_TYPE_MATTERS 1 276: 277: /* Make strings word-aligned so strcpy from constants will be faster. */ 278: #define CONSTANT_ALIGNMENT(EXP, ALIGN) \ 279: (TREE_CODE (EXP) == STRING_CST \ 280: && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN)) 281: 282: /* Make arrays of chars word-aligned for the same reasons. */ 283: #define DATA_ALIGNMENT(TYPE, ALIGN) \ 284: (TREE_CODE (TYPE) == ARRAY_TYPE \ 285: && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \ 286: && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN)) 287: 288: /* Non-zero if move instructions will actually fail to work 289: when given unaligned data. */ 290: #define STRICT_ALIGNMENT 0 291: 292: /* Standard register usage. */ 293: 294: /* Number of actual hardware registers. 295: The hardware registers are assigned numbers for the compiler 296: from 0 to just below FIRST_PSEUDO_REGISTER. 297: All registers that the compiler knows about must be given numbers, 298: even those that are not normally considered general registers. 299: 300: RS/6000 has 32 fixed-point registers, 32 floating-point registers, 301: an MQ register, a count register, a link register, and 8 condition 302: register fields, which we view here as separate registers. 303: 304: In addition, the difference between the frame and argument pointers is 305: a function of the number of registers saved, so we need to have a 306: register for AP that will later be eliminated in favor of SP or FP. 307: This is a normal register, but it is fixed. */ 308: 309: #define FIRST_PSEUDO_REGISTER 76 310: 311: /* 1 for registers that have pervasive standard uses 312: and are not available for the register allocator. 313: 314: On RS/6000, r1 is used for the stack and r2 is used as the TOC pointer. 315: 316: cr5 is not supposed to be used. */ 317: 318: #define FIXED_REGISTERS \ 319: {0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ 320: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ 321: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ 322: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ 323: 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0} 324: 325: /* 1 for registers not available across function calls. 326: These must include the FIXED_REGISTERS and also any 327: registers that can be used without being saved. 328: The latter must include the registers where values are returned 329: and the register where structure-value addresses are passed. 330: Aside from that, you can include as many other registers as you like. */ 331: 332: #define CALL_USED_REGISTERS \ 333: {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, \ 334: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ 335: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, \ 336: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ 337: 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1} 338: 339: /* List the order in which to allocate registers. Each register must be 340: listed once, even those in FIXED_REGISTERS. 341: 342: We allocate in the following order: 343: fp0 (not saved or used for anything) 344: fp13 - fp2 (not saved; incoming fp arg registers) 345: fp1 (not saved; return value) 346: fp31 - fp14 (saved; order given to save least number) 347: cr1, cr6, cr7 (not saved or special) 348: cr0 (not saved, but used for arithmetic operations) 349: cr2, cr3, cr4 (saved) 350: r0 (not saved; cannot be base reg) 351: r9 (not saved; best for TImode) 352: r11, r10, r8-r4 (not saved; highest used first to make less conflict) 353: r3 (not saved; return value register) 354: r31 - r13 (saved; order given to save least number) 355: r12 (not saved; if used for DImode or DFmode would use r13) 356: mq (not saved; best to use it if we can) 357: ctr (not saved; when we have the choice ctr is better) 358: lr (saved) 359: cr5, r1, r2, ap (fixed) */ 360: 361: #define REG_ALLOC_ORDER \ 362: {32, \ 363: 45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, \ 364: 33, \ 365: 63, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, \ 366: 50, 49, 48, 47, 46, \ 367: 69, 74, 75, 68, 70, 71, 72, \ 368: 0, \ 369: 9, 11, 10, 8, 7, 6, 5, 4, \ 370: 3, \ 371: 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, \ 372: 18, 17, 16, 15, 14, 13, 12, \ 373: 64, 66, 65, \ 374: 73, 1, 2, 67} 375: 376: /* True if register is floating-point. */ 377: #define FP_REGNO_P(N) ((N) >= 32 && (N) <= 63) 378: 379: /* True if register is a condition register. */ 380: #define CR_REGNO_P(N) ((N) >= 68 && (N) <= 75) 381: 382: /* True if register is an integer register. */ 383: #define INT_REGNO_P(N) ((N) <= 31 || (N) == 67) 384: 385: /* Return number of consecutive hard regs needed starting at reg REGNO 386: to hold something of mode MODE. 387: This is ordinarily the length in words of a value of mode MODE 388: but can be less for certain modes in special long registers. 389: 390: On RS/6000, ordinary registers hold 32 bits worth; 391: a single floating point register holds 64 bits worth. */ 392: 393: #define HARD_REGNO_NREGS(REGNO, MODE) \ 394: (FP_REGNO_P (REGNO) \ 395: ? ((GET_MODE_SIZE (MODE) + 2 * UNITS_PER_WORD - 1) / (2 * UNITS_PER_WORD)) \ 396: : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)) 397: 398: /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE. 399: On RS/6000, the cpu registers can hold any mode but the float registers 400: can hold only floating modes and CR register can only hold CC modes. We 401: cannot put DImode or TImode anywhere except general register and they 402: must be able to fit within the register set. */ 403: 404: #define HARD_REGNO_MODE_OK(REGNO, MODE) \ 405: (FP_REGNO_P (REGNO) ? GET_MODE_CLASS (MODE) == MODE_FLOAT \ 406: : CR_REGNO_P (REGNO) ? GET_MODE_CLASS (MODE) == MODE_CC \ 1.1.1.2 ! root 407: : ! INT_REGNO_P (REGNO) ? (GET_MODE_CLASS (MODE) == MODE_INT \ ! 408: && GET_MODE_SIZE (MODE) <= UNITS_PER_WORD) \ 1.1 root 409: : 1) 410: 411: /* Value is 1 if it is a good idea to tie two pseudo registers 412: when one has mode MODE1 and one has mode MODE2. 413: If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2, 414: for any hard reg, then this must be 0 for correct output. */ 415: #define MODES_TIEABLE_P(MODE1, MODE2) \ 416: (GET_MODE_CLASS (MODE1) == MODE_FLOAT \ 417: ? GET_MODE_CLASS (MODE2) == MODE_FLOAT \ 418: : GET_MODE_CLASS (MODE2) == MODE_FLOAT \ 419: ? GET_MODE_CLASS (MODE1) == MODE_FLOAT \ 420: : GET_MODE_CLASS (MODE1) == MODE_CC \ 421: ? GET_MODE_CLASS (MODE2) == MODE_CC \ 422: : GET_MODE_CLASS (MODE2) == MODE_CC \ 423: ? GET_MODE_CLASS (MODE1) == MODE_CC \ 424: : 1) 425: 426: /* A C expression returning the cost of moving data from a register of class 427: CLASS1 to one of CLASS2. 428: 429: On the RS/6000, copying between floating-point and fixed-point 430: registers is expensive. */ 431: 432: #define REGISTER_MOVE_COST(CLASS1, CLASS2) \ 433: ((CLASS1) == FLOAT_REGS && (CLASS2) == FLOAT_REGS ? 2 \ 434: : (CLASS1) == FLOAT_REGS && (CLASS2) != FLOAT_REGS ? 10 \ 435: : (CLASS1) != FLOAT_REGS && (CLASS2) == FLOAT_REGS ? 10 \ 436: : 2) 437: 438: /* A C expressions returning the cost of moving data of MODE from a register to 439: or from memory. 440: 441: On the RS/6000, bump this up a bit. */ 442: 443: #define MEMORY_MOVE_COST(MODE) 6 444: 445: /* Specify the cost of a branch insn; roughly the number of extra insns that 446: should be added to avoid a branch. 447: 448: Set this to 3 on the RS/6000 since that is roughly the average cost of an 449: unscheduled conditional branch. */ 450: 451: #define BRANCH_COST 3 452: 453: /* A C statement (sans semicolon) to update the integer variable COST 454: based on the relationship between INSN that is dependent on 455: DEP_INSN through the dependence LINK. The default is to make no 456: adjustment to COST. On the RS/6000, ignore the cost of anti- and 457: output-dependencies. In fact, output dependencies on the CR do have 458: a cost, but it is probably not worthwhile to track it. */ 459: 460: #define ADJUST_COST(INSN,LINK,DEP_INSN,COST) \ 461: if (REG_NOTE_KIND (LINK) != 0) \ 462: (COST) = 0; /* Anti or output dependence. */ 463: 1.1.1.2 ! root 464: /* Define this macro to change register usage conditional on target flags. ! 465: Set MQ register fixed (already call_used) if not POWER architecture ! 466: (RIOS1, RIOS2, and PPC601) so that it will not be allocated. ! 467: Provide alternate register names for ppcas assembler */ ! 468: ! 469: #define CONDITIONAL_REGISTER_USAGE \ ! 470: if (!TARGET_POWER) \ ! 471: fixed_regs[64] = 1; ! 472: 1.1 root 473: /* Specify the registers used for certain standard purposes. 474: The values of these macros are register numbers. */ 475: 476: /* RS/6000 pc isn't overloaded on a register that the compiler knows about. */ 477: /* #define PC_REGNUM */ 478: 479: /* Register to use for pushing function arguments. */ 480: #define STACK_POINTER_REGNUM 1 481: 482: /* Base register for access to local variables of the function. */ 483: #define FRAME_POINTER_REGNUM 31 484: 485: /* Value should be nonzero if functions must have frame pointers. 486: Zero means the frame pointer need not be set up (and parms 487: may be accessed via the stack pointer) in functions that seem suitable. 488: This is computed in `reload', in reload1.c. */ 489: #define FRAME_POINTER_REQUIRED 0 490: 491: /* Base register for access to arguments of the function. */ 492: #define ARG_POINTER_REGNUM 67 493: 494: /* Place to put static chain when calling a function that requires it. */ 495: #define STATIC_CHAIN_REGNUM 11 496: 497: /* Place that structure value return address is placed. 498: 499: On the RS/6000, it is passed as an extra parameter. */ 500: #define STRUCT_VALUE 0 501: 502: /* Define the classes of registers for register constraints in the 503: machine description. Also define ranges of constants. 504: 505: One of the classes must always be named ALL_REGS and include all hard regs. 506: If there is more than one class, another class must be named NO_REGS 507: and contain no registers. 508: 509: The name GENERAL_REGS must be the name of a class (or an alias for 510: another name such as ALL_REGS). This is the class of registers 511: that is allowed by "g" or "r" in a register constraint. 512: Also, registers outside this class are allocated only when 513: instructions express preferences for them. 514: 515: The classes must be numbered in nondecreasing order; that is, 516: a larger-numbered class must never be contained completely 517: in a smaller-numbered class. 518: 519: For any two classes, it is very desirable that there be another 520: class that represents their union. */ 521: 522: /* The RS/6000 has three types of registers, fixed-point, floating-point, 523: and condition registers, plus three special registers, MQ, CTR, and the 524: link register. 525: 526: However, r0 is special in that it cannot be used as a base register. 527: So make a class for registers valid as base registers. 528: 529: Also, cr0 is the only condition code register that can be used in 530: arithmetic insns, so make a separate class for it. */ 531: 532: enum reg_class { NO_REGS, BASE_REGS, GENERAL_REGS, FLOAT_REGS, 533: NON_SPECIAL_REGS, MQ_REGS, LINK_REGS, CTR_REGS, LINK_OR_CTR_REGS, 534: SPECIAL_REGS, SPEC_OR_GEN_REGS, CR0_REGS, CR_REGS, NON_FLOAT_REGS, 535: ALL_REGS, LIM_REG_CLASSES }; 536: 537: #define N_REG_CLASSES (int) LIM_REG_CLASSES 538: 539: /* Give names of register classes as strings for dump file. */ 540: 541: #define REG_CLASS_NAMES \ 542: { "NO_REGS", "BASE_REGS", "GENERAL_REGS", "FLOAT_REGS", \ 543: "NON_SPECIAL_REGS", "MQ_REGS", "LINK_REGS", "CTR_REGS", \ 544: "LINK_OR_CTR_REGS", "SPECIAL_REGS", "SPEC_OR_GEN_REGS", \ 545: "CR0_REGS", "CR_REGS", "NON_FLOAT_REGS", "ALL_REGS" } 546: 547: /* Define which registers fit in which classes. 548: This is an initializer for a vector of HARD_REG_SET 549: of length N_REG_CLASSES. */ 550: 551: #define REG_CLASS_CONTENTS \ 552: { {0, 0, 0}, {0xfffffffe, 0, 8}, {~0, 0, 8}, \ 553: {0, ~0, 0}, {~0, ~0, 8}, {0, 0, 1}, {0, 0, 2}, \ 554: {0, 0, 4}, {0, 0, 6}, {0, 0, 7}, {~0, 0, 15}, \ 555: {0, 0, 16}, {0, 0, 0xff0}, {~0, 0, 0xffff}, \ 556: {~0, ~0, 0xffff} } 557: 558: /* The same information, inverted: 559: Return the class number of the smallest class containing 560: reg number REGNO. This could be a conditional expression 561: or could index an array. */ 562: 563: #define REGNO_REG_CLASS(REGNO) \ 564: ((REGNO) == 0 ? GENERAL_REGS \ 565: : (REGNO) < 32 ? BASE_REGS \ 566: : FP_REGNO_P (REGNO) ? FLOAT_REGS \ 567: : (REGNO) == 68 ? CR0_REGS \ 568: : CR_REGNO_P (REGNO) ? CR_REGS \ 569: : (REGNO) == 64 ? MQ_REGS \ 570: : (REGNO) == 65 ? LINK_REGS \ 571: : (REGNO) == 66 ? CTR_REGS \ 572: : (REGNO) == 67 ? BASE_REGS \ 573: : NO_REGS) 574: 575: /* The class value for index registers, and the one for base regs. */ 576: #define INDEX_REG_CLASS GENERAL_REGS 577: #define BASE_REG_CLASS BASE_REGS 578: 579: /* Get reg_class from a letter such as appears in the machine description. */ 580: 581: #define REG_CLASS_FROM_LETTER(C) \ 582: ((C) == 'f' ? FLOAT_REGS \ 583: : (C) == 'b' ? BASE_REGS \ 584: : (C) == 'h' ? SPECIAL_REGS \ 585: : (C) == 'q' ? MQ_REGS \ 586: : (C) == 'c' ? CTR_REGS \ 587: : (C) == 'l' ? LINK_REGS \ 588: : (C) == 'x' ? CR0_REGS \ 589: : (C) == 'y' ? CR_REGS \ 590: : NO_REGS) 591: 592: /* The letters I, J, K, L, M, N, and P in a register constraint string 593: can be used to stand for particular ranges of immediate operands. 594: This macro defines what the ranges are. 595: C is the letter, and VALUE is a constant value. 596: Return 1 if VALUE is in the range specified by C. 597: 598: `I' is signed 16-bit constants 599: `J' is a constant with only the high-order 16 bits non-zero 600: `K' is a constant with only the low-order 16 bits non-zero 601: `L' is a constant that can be placed into a mask operand 602: `M' is a constant that is greater than 31 603: `N' is a constant that is an exact power of two 604: `O' is the constant zero 605: `P' is a constant whose negation is a signed 16-bit constant */ 606: 607: #define CONST_OK_FOR_LETTER_P(VALUE, C) \ 608: ( (C) == 'I' ? (unsigned) ((VALUE) + 0x8000) < 0x10000 \ 609: : (C) == 'J' ? ((VALUE) & 0xffff) == 0 \ 610: : (C) == 'K' ? ((VALUE) & 0xffff0000) == 0 \ 611: : (C) == 'L' ? mask_constant (VALUE) \ 612: : (C) == 'M' ? (VALUE) > 31 \ 613: : (C) == 'N' ? exact_log2 (VALUE) >= 0 \ 614: : (C) == 'O' ? (VALUE) == 0 \ 615: : (C) == 'P' ? (unsigned) ((- (VALUE)) + 0x8000) < 0x1000 \ 616: : 0) 617: 618: /* Similar, but for floating constants, and defining letters G and H. 619: Here VALUE is the CONST_DOUBLE rtx itself. 620: 621: We flag for special constants when we can copy the constant into 622: a general register in two insns for DF and one insn for SF. */ 623: 624: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \ 625: ((C) == 'G' ? easy_fp_constant (VALUE, GET_MODE (VALUE)) : 0) 626: 627: /* Optional extra constraints for this machine. 628: 629: For the RS/6000, `Q' means that this is a memory operand that is just 630: an offset from a register. */ 631: 632: #define EXTRA_CONSTRAINT(OP, C) \ 633: ((C) == 'Q' ? GET_CODE (OP) == MEM && GET_CODE (XEXP (OP, 0)) == REG \ 634: : 0) 635: 636: /* Given an rtx X being reloaded into a reg required to be 637: in class CLASS, return the class of reg to actually use. 638: In general this is just CLASS; but on some machines 639: in some cases it is preferable to use a more restrictive class. 640: 641: On the RS/6000, we have to return NO_REGS when we want to reload a 642: floating-point CONST_DOUBLE to force it to be copied to memory. */ 643: 644: #define PREFERRED_RELOAD_CLASS(X,CLASS) \ 645: ((GET_CODE (X) == CONST_DOUBLE \ 646: && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT) \ 647: ? NO_REGS : (CLASS)) 648: 649: /* Return the register class of a scratch register needed to copy IN into 650: or out of a register in CLASS in MODE. If it can be done directly, 651: NO_REGS is returned. */ 652: 653: #define SECONDARY_RELOAD_CLASS(CLASS,MODE,IN) \ 654: secondary_reload_class (CLASS, MODE, IN) 655: 1.1.1.2 ! root 656: /* If we are copying between FP registers and anything else, we need a memory ! 657: location. */ ! 658: ! 659: #define SECONDARY_MEMORY_NEEDED(CLASS1,CLASS2,MODE) \ ! 660: ((CLASS1) != (CLASS2) && ((CLASS1) == FLOAT_REGS || (CLASS2) == FLOAT_REGS)) ! 661: 1.1 root 662: /* Return the maximum number of consecutive registers 663: needed to represent mode MODE in a register of class CLASS. 664: 665: On RS/6000, this is the size of MODE in words, 666: except in the FP regs, where a single reg is enough for two words. */ 667: #define CLASS_MAX_NREGS(CLASS, MODE) \ 668: ((CLASS) == FLOAT_REGS \ 669: ? ((GET_MODE_SIZE (MODE) + 2 * UNITS_PER_WORD - 1) / (2 * UNITS_PER_WORD)) \ 670: : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)) 671: 672: /* Stack layout; function entry, exit and calling. */ 673: 674: /* Define this if pushing a word on the stack 675: makes the stack pointer a smaller address. */ 676: #define STACK_GROWS_DOWNWARD 677: 678: /* Define this if the nominal address of the stack frame 679: is at the high-address end of the local variables; 680: that is, each additional local variable allocated 681: goes at a more negative offset in the frame. 682: 683: On the RS/6000, we grow upwards, from the area after the outgoing 684: arguments. */ 685: /* #define FRAME_GROWS_DOWNWARD */ 686: 687: /* Offset within stack frame to start allocating local variables at. 688: If FRAME_GROWS_DOWNWARD, this is the offset to the END of the 689: first local allocated. Otherwise, it is the offset to the BEGINNING 690: of the first local allocated. 691: 692: On the RS/6000, the frame pointer is the same as the stack pointer, 693: except for dynamic allocations. So we start after the fixed area and 694: outgoing parameter area. */ 695: 696: #define STARTING_FRAME_OFFSET (current_function_outgoing_args_size + 24) 697: 698: /* If we generate an insn to push BYTES bytes, 699: this says how many the stack pointer really advances by. 700: On RS/6000, don't define this because there are no push insns. */ 701: /* #define PUSH_ROUNDING(BYTES) */ 702: 703: /* Offset of first parameter from the argument pointer register value. 704: On the RS/6000, we define the argument pointer to the start of the fixed 705: area. */ 706: #define FIRST_PARM_OFFSET(FNDECL) 24 707: 708: /* Define this if stack space is still allocated for a parameter passed 709: in a register. The value is the number of bytes allocated to this 710: area. */ 711: #define REG_PARM_STACK_SPACE(FNDECL) 32 712: 713: /* Define this if the above stack space is to be considered part of the 714: space allocated by the caller. */ 715: #define OUTGOING_REG_PARM_STACK_SPACE 716: 717: /* This is the difference between the logical top of stack and the actual sp. 718: 719: For the RS/6000, sp points past the fixed area. */ 720: #define STACK_POINTER_OFFSET 24 721: 722: /* Define this if the maximum size of all the outgoing args is to be 723: accumulated and pushed during the prologue. The amount can be 724: found in the variable current_function_outgoing_args_size. */ 725: #define ACCUMULATE_OUTGOING_ARGS 726: 727: /* Value is the number of bytes of arguments automatically 728: popped when returning from a subroutine call. 729: FUNTYPE is the data type of the function (as a tree), 730: or for a library call it is an identifier node for the subroutine name. 731: SIZE is the number of bytes of arguments passed on the stack. */ 732: 733: #define RETURN_POPS_ARGS(FUNTYPE,SIZE) 0 734: 735: /* Define how to find the value returned by a function. 736: VALTYPE is the data type of the value (as a tree). 737: If the precise function being called is known, FUNC is its FUNCTION_DECL; 738: otherwise, FUNC is 0. 739: 740: On RS/6000 an integer value is in r3 and a floating-point value is in 741: fp1. */ 742: 743: #define FUNCTION_VALUE(VALTYPE, FUNC) \ 744: gen_rtx (REG, TYPE_MODE (VALTYPE), \ 745: TREE_CODE (VALTYPE) == REAL_TYPE ? 33 : 3) 746: 747: /* Define how to find the value returned by a library function 748: assuming the value has mode MODE. */ 749: 750: #define LIBCALL_VALUE(MODE) \ 751: gen_rtx (REG, MODE, GET_MODE_CLASS (MODE) == MODE_FLOAT ? 33 : 3) 752: 753: /* The definition of this macro implies that there are cases where 754: a scalar value cannot be returned in registers. 755: 756: For the RS/6000, any structure or union type is returned in memory. */ 757: 758: #define RETURN_IN_MEMORY(TYPE) \ 759: (TYPE_MODE (TYPE) == BLKmode) 760: 761: /* 1 if N is a possible register number for a function value 762: as seen by the caller. 763: 764: On RS/6000, this is r3 and fp1. */ 765: 766: #define FUNCTION_VALUE_REGNO_P(N) ((N) == 3 || ((N) == 33)) 767: 768: /* 1 if N is a possible register number for function argument passing. 769: On RS/6000, these are r3-r10 and fp1-fp13. */ 770: 771: #define FUNCTION_ARG_REGNO_P(N) \ 772: (((N) <= 10 && (N) >= 3) || ((N) >= 33 && (N) <= 45)) 773: 774: /* Define a data type for recording info about an argument list 775: during the scan of that argument list. This data type should 776: hold all necessary information about the function itself 777: and about the args processed so far, enough to enable macros 778: such as FUNCTION_ARG to determine where the next arg should go. 779: 780: On the RS/6000, this is a structure. The first element is the number of 781: total argument words, the second is used to store the next 782: floating-point register number, and the third says how many more args we 783: have prototype types for. */ 784: 785: struct rs6000_args {int words, fregno, nargs_prototype; }; 786: #define CUMULATIVE_ARGS struct rs6000_args 787: 788: /* Define intermediate macro to compute the size (in registers) of an argument 789: for the RS/6000. */ 790: 791: #define RS6000_ARG_SIZE(MODE, TYPE, NAMED) \ 792: (! (NAMED) ? 0 \ 793: : (MODE) != BLKmode \ 794: ? (GET_MODE_SIZE (MODE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD \ 795: : (int_size_in_bytes (TYPE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD) 796: 797: /* Initialize a variable CUM of type CUMULATIVE_ARGS 798: for a call to a function whose data type is FNTYPE. 799: For a library call, FNTYPE is 0. */ 800: 801: #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME) \ 802: (CUM).words = 0, \ 803: (CUM).fregno = 33, \ 804: (CUM).nargs_prototype = (FNTYPE && TYPE_ARG_TYPES (FNTYPE) \ 805: ? (list_length (TYPE_ARG_TYPES (FNTYPE)) - 1 \ 806: + (TYPE_MODE (TREE_TYPE (FNTYPE)) == BLKmode \ 807: || RETURN_IN_MEMORY (TREE_TYPE (FNTYPE)))) \ 808: : 0) 809: 810: /* Similar, but when scanning the definition of a procedure. We always 811: set NARGS_PROTOTYPE large so we never return an EXPR_LIST. */ 812: 813: #define INIT_CUMULATIVE_INCOMING_ARGS(CUM,FNTYPE,IGNORE) \ 814: (CUM).words = 0, \ 815: (CUM).fregno = 33, \ 816: (CUM).nargs_prototype = 1000 817: 818: /* Update the data in CUM to advance over an argument 819: of mode MODE and data type TYPE. 820: (TYPE is null for libcalls where that information may not be available.) */ 821: 822: #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \ 823: { (CUM).nargs_prototype--; \ 824: if (NAMED) \ 825: { \ 826: (CUM).words += RS6000_ARG_SIZE (MODE, TYPE, NAMED); \ 827: if (GET_MODE_CLASS (MODE) == MODE_FLOAT) \ 828: (CUM).fregno++; \ 829: } \ 830: } 831: 832: /* Non-zero if we can use a floating-point register to pass this arg. */ 833: #define USE_FP_FOR_ARG_P(CUM,MODE,TYPE) \ 834: (GET_MODE_CLASS (MODE) == MODE_FLOAT && (CUM).fregno < 46) 835: 836: /* Determine where to put an argument to a function. 837: Value is zero to push the argument on the stack, 838: or a hard register in which to store the argument. 839: 840: MODE is the argument's machine mode. 841: TYPE is the data type of the argument (as a tree). 842: This is null for libcalls where that information may 843: not be available. 844: CUM is a variable of type CUMULATIVE_ARGS which gives info about 845: the preceding args and about the function being called. 846: NAMED is nonzero if this argument is a named parameter 847: (otherwise it is an extra parameter matching an ellipsis). 848: 849: On RS/6000 the first eight words of non-FP are normally in registers 850: and the rest are pushed. The first 13 FP args are in registers. 851: 852: If this is floating-point and no prototype is specified, we use 853: both an FP and integer register (or possibly FP reg and stack). Library 854: functions (when TYPE is zero) always have the proper types for args, 855: so we can pass the FP value just in one register. emit_library_function 856: doesn't support EXPR_LIST anyway. */ 857: 858: #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ 859: (! (NAMED) ? 0 \ 860: : ((TYPE) != 0 && TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST) ? 0 \ 861: : USE_FP_FOR_ARG_P (CUM, MODE, TYPE) \ 862: ? ((CUM).nargs_prototype > 0 || (TYPE) == 0 \ 863: ? gen_rtx (REG, MODE, (CUM).fregno) \ 864: : ((CUM).words < 8 \ 865: ? gen_rtx (EXPR_LIST, VOIDmode, \ 866: gen_rtx (REG, (MODE), 3 + (CUM).words), \ 867: gen_rtx (REG, (MODE), (CUM).fregno)) \ 868: : gen_rtx (EXPR_LIST, VOIDmode, 0, \ 869: gen_rtx (REG, (MODE), (CUM).fregno)))) \ 870: : (CUM).words < 8 ? gen_rtx(REG, (MODE), 3 + (CUM).words) : 0) 871: 872: /* For an arg passed partly in registers and partly in memory, 873: this is the number of registers used. 874: For args passed entirely in registers or entirely in memory, zero. */ 875: 876: #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \ 877: (! (NAMED) ? 0 \ 878: : USE_FP_FOR_ARG_P (CUM, MODE, TYPE) && (CUM).nargs_prototype >= 0 ? 0 \ 879: : (((CUM).words < 8 \ 880: && 8 < ((CUM).words + RS6000_ARG_SIZE (MODE, TYPE, NAMED))) \ 881: ? 8 - (CUM).words : 0)) 882: 883: /* Perform any needed actions needed for a function that is receiving a 884: variable number of arguments. 885: 886: CUM is as above. 887: 888: MODE and TYPE are the mode and type of the current parameter. 889: 890: PRETEND_SIZE is a variable that should be set to the amount of stack 891: that must be pushed by the prolog to pretend that our caller pushed 892: it. 893: 894: Normally, this macro will push all remaining incoming registers on the 895: stack and set PRETEND_SIZE to the length of the registers pushed. */ 896: 897: #define SETUP_INCOMING_VARARGS(CUM,MODE,TYPE,PRETEND_SIZE,NO_RTL) \ 898: { if ((CUM).words < 8) \ 899: { \ 900: int first_reg_offset = (CUM).words; \ 901: \ 902: if (MUST_PASS_IN_STACK (MODE, TYPE)) \ 903: first_reg_offset += RS6000_ARG_SIZE (TYPE_MODE (TYPE), TYPE, 1); \ 904: \ 905: if (first_reg_offset > 8) \ 906: first_reg_offset = 8; \ 907: \ 908: if (! (NO_RTL) && first_reg_offset != 8) \ 909: move_block_from_reg \ 910: (3 + first_reg_offset, \ 911: gen_rtx (MEM, BLKmode, \ 912: plus_constant (virtual_incoming_args_rtx, \ 913: first_reg_offset * 4)), \ 1.1.1.2 ! root 914: 8 - first_reg_offset, (8 - first_reg_offset) * UNITS_PER_WORD); \ 1.1 root 915: PRETEND_SIZE = (8 - first_reg_offset) * UNITS_PER_WORD; \ 916: } \ 917: } 918: 919: /* This macro generates the assembly code for function entry. 920: FILE is a stdio stream to output the code to. 921: SIZE is an int: how many units of temporary storage to allocate. 922: Refer to the array `regs_ever_live' to determine which registers 923: to save; `regs_ever_live[I]' is nonzero if register number I 924: is ever used in the function. This macro is responsible for 925: knowing which registers should not be saved even if used. */ 926: 927: #define FUNCTION_PROLOGUE(FILE, SIZE) output_prolog (FILE, SIZE) 928: 929: /* Output assembler code to FILE to increment profiler label # LABELNO 930: for profiling a function entry. */ 931: 932: #define FUNCTION_PROFILER(FILE, LABELNO) \ 933: output_function_profiler ((FILE), (LABELNO)); 934: 935: /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, 936: the stack pointer does not matter. No definition is equivalent to 937: always zero. 938: 939: On the RS/6000, this is non-zero because we can restore the stack from 940: its backpointer, which we maintain. */ 941: #define EXIT_IGNORE_STACK 1 942: 943: /* This macro generates the assembly code for function exit, 944: on machines that need it. If FUNCTION_EPILOGUE is not defined 945: then individual return instructions are generated for each 946: return statement. Args are same as for FUNCTION_PROLOGUE. 947: 948: The function epilogue should not depend on the current stack pointer! 949: It should use the frame pointer only. This is mandatory because 950: of alloca; we also take advantage of it to omit stack adjustments 951: before returning. */ 952: 953: #define FUNCTION_EPILOGUE(FILE, SIZE) output_epilog (FILE, SIZE) 954: 955: /* Output assembler code for a block containing the constant parts 956: of a trampoline, leaving space for the variable parts. 957: 958: The trampoline should set the static chain pointer to value placed 959: into the trampoline and should branch to the specified routine. 960: 961: On the RS/6000, this is not code at all, but merely a data area, 962: since that is the way all functions are called. The first word is 963: the address of the function, the second word is the TOC pointer (r2), 964: and the third word is the static chain value. */ 965: 966: #define TRAMPOLINE_TEMPLATE(FILE) { fprintf (FILE, "\t.long 0, 0, 0\n"); } 967: 968: /* Length in units of the trampoline for entering a nested function. */ 969: 970: #define TRAMPOLINE_SIZE 12 971: 972: /* Emit RTL insns to initialize the variable parts of a trampoline. 973: FNADDR is an RTX for the address of the function's pure code. 974: CXT is an RTX for the static chain value for the function. */ 975: 976: #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, CXT) \ 977: { \ 978: emit_move_insn (gen_rtx (MEM, SImode, \ 979: memory_address (SImode, (ADDR))), \ 980: gen_rtx (MEM, SImode, \ 981: memory_address (SImode, (FNADDR)))); \ 982: emit_move_insn (gen_rtx (MEM, SImode, \ 983: memory_address (SImode, \ 984: plus_constant ((ADDR), 4))), \ 985: gen_rtx (MEM, SImode, \ 986: memory_address (SImode, \ 987: plus_constant ((FNADDR), 4)))); \ 988: emit_move_insn (gen_rtx (MEM, SImode, \ 989: memory_address (SImode, \ 990: plus_constant ((ADDR), 8))), \ 991: force_reg (SImode, (CXT))); \ 992: } 993: 994: /* Definitions for register eliminations. 995: 996: We have two registers that can be eliminated on the RS/6000. First, the 997: frame pointer register can often be eliminated in favor of the stack 998: pointer register. Secondly, the argument pointer register can always be 1.1.1.2 ! root 999: eliminated; it is replaced with either the stack or frame pointer. ! 1000: ! 1001: In addition, we use the elimination mechanism to see if r30 is needed ! 1002: Initially we assume that it isn't. If it is, we spill it. This is done ! 1003: by making it an eliminable register. We replace it with itself so that ! 1004: if it isn't needed, then existing uses won't be modified. */ 1.1 root 1005: 1006: /* This is an array of structures. Each structure initializes one pair 1007: of eliminable registers. The "from" register number is given first, 1008: followed by "to". Eliminations of the same "from" register are listed 1009: in order of preference. */ 1010: #define ELIMINABLE_REGS \ 1011: {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ 1012: { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ 1.1.1.2 ! root 1013: { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \ ! 1014: { 30, 30} } 1.1 root 1015: 1016: /* Given FROM and TO register numbers, say whether this elimination is allowed. 1017: Frame pointer elimination is automatically handled. 1018: 1019: For the RS/6000, if frame pointer elimination is being done, we would like 1.1.1.2 ! root 1020: to convert ap into fp, not sp. ! 1021: ! 1022: We need r30 if -mmininal-toc was specified, and there are constant pool ! 1023: references. */ 1.1 root 1024: 1025: #define CAN_ELIMINATE(FROM, TO) \ 1026: ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \ 1027: ? ! frame_pointer_needed \ 1.1.1.2 ! root 1028: : (FROM) == 30 ? ! TARGET_MINIMAL_TOC || get_pool_size () == 0 \ 1.1 root 1029: : 1) 1030: 1031: /* Define the offset between two registers, one to be eliminated, and the other 1032: its replacement, at the start of a routine. */ 1033: #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ 1034: { \ 1035: int total_stack_size = (rs6000_sa_size () + get_frame_size () \ 1036: + current_function_outgoing_args_size); \ 1037: \ 1038: total_stack_size = (total_stack_size + 7) & ~7; \ 1039: \ 1040: if ((FROM) == FRAME_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \ 1041: { \ 1042: if (rs6000_pushes_stack ()) \ 1043: (OFFSET) = 0; \ 1044: else \ 1045: (OFFSET) = - total_stack_size; \ 1046: } \ 1047: else if ((FROM) == ARG_POINTER_REGNUM && (TO) == FRAME_POINTER_REGNUM) \ 1048: (OFFSET) = total_stack_size; \ 1049: else if ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \ 1050: { \ 1051: if (rs6000_pushes_stack ()) \ 1052: (OFFSET) = total_stack_size; \ 1053: else \ 1054: (OFFSET) = 0; \ 1055: } \ 1.1.1.2 ! root 1056: else if ((FROM) == 30) \ ! 1057: (OFFSET) = 0; \ 1.1 root 1058: else \ 1059: abort (); \ 1060: } 1061: 1062: /* Addressing modes, and classification of registers for them. */ 1063: 1064: /* #define HAVE_POST_INCREMENT */ 1065: /* #define HAVE_POST_DECREMENT */ 1066: 1067: #define HAVE_PRE_DECREMENT 1068: #define HAVE_PRE_INCREMENT 1069: 1070: /* Macros to check register numbers against specific register classes. */ 1071: 1072: /* These assume that REGNO is a hard or pseudo reg number. 1073: They give nonzero only if REGNO is a hard reg of the suitable class 1074: or a pseudo reg currently allocated to a suitable hard reg. 1075: Since they use reg_renumber, they are safe only once reg_renumber 1076: has been allocated, which happens in local-alloc.c. */ 1077: 1078: #define REGNO_OK_FOR_INDEX_P(REGNO) \ 1079: ((REGNO) < FIRST_PSEUDO_REGISTER \ 1080: ? (REGNO) <= 31 || (REGNO) == 67 \ 1081: : (reg_renumber[REGNO] >= 0 \ 1082: && (reg_renumber[REGNO] <= 31 || reg_renumber[REGNO] == 67))) 1083: 1084: #define REGNO_OK_FOR_BASE_P(REGNO) \ 1085: ((REGNO) < FIRST_PSEUDO_REGISTER \ 1086: ? ((REGNO) > 0 && (REGNO) <= 31) || (REGNO) == 67 \ 1087: : (reg_renumber[REGNO] > 0 \ 1088: && (reg_renumber[REGNO] <= 31 || reg_renumber[REGNO] == 67))) 1089: 1090: /* Maximum number of registers that can appear in a valid memory address. */ 1091: 1092: #define MAX_REGS_PER_ADDRESS 2 1093: 1094: /* Recognize any constant value that is a valid address. */ 1095: 1096: #define CONSTANT_ADDRESS_P(X) \ 1097: (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \ 1098: || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST \ 1099: || GET_CODE (X) == HIGH) 1100: 1101: /* Nonzero if the constant value X is a legitimate general operand. 1102: It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. 1103: 1104: On the RS/6000, all integer constants are acceptable, most won't be valid 1105: for particular insns, though. Only easy FP constants are 1106: acceptable. */ 1107: 1108: #define LEGITIMATE_CONSTANT_P(X) \ 1109: (GET_CODE (X) != CONST_DOUBLE || GET_MODE (X) == VOIDmode \ 1110: || easy_fp_constant (X, GET_MODE (X))) 1111: 1112: /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx 1113: and check its validity for a certain class. 1114: We have two alternate definitions for each of them. 1115: The usual definition accepts all pseudo regs; the other rejects 1116: them unless they have been allocated suitable hard regs. 1117: The symbol REG_OK_STRICT causes the latter definition to be used. 1118: 1119: Most source files want to accept pseudo regs in the hope that 1120: they will get allocated to the class that the insn wants them to be in. 1121: Source files for reload pass need to be strict. 1122: After reload, it makes no difference, since pseudo regs have 1123: been eliminated by then. */ 1124: 1125: #ifndef REG_OK_STRICT 1126: 1127: /* Nonzero if X is a hard reg that can be used as an index 1128: or if it is a pseudo reg. */ 1129: #define REG_OK_FOR_INDEX_P(X) \ 1130: (REGNO (X) <= 31 || REGNO (X) == 67 || REGNO (X) >= FIRST_PSEUDO_REGISTER) 1131: 1132: /* Nonzero if X is a hard reg that can be used as a base reg 1133: or if it is a pseudo reg. */ 1134: #define REG_OK_FOR_BASE_P(X) \ 1135: (REGNO (X) > 0 && REG_OK_FOR_INDEX_P (X)) 1136: 1137: #else 1138: 1139: /* Nonzero if X is a hard reg that can be used as an index. */ 1140: #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X)) 1141: /* Nonzero if X is a hard reg that can be used as a base reg. */ 1142: #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) 1143: 1144: #endif 1145: 1146: /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression 1147: that is a valid memory address for an instruction. 1148: The MODE argument is the machine mode for the MEM expression 1149: that wants to use this address. 1150: 1151: On the RS/6000, there are four valid address: a SYMBOL_REF that 1152: refers to a constant pool entry of an address (or the sum of it 1153: plus a constant), a short (16-bit signed) constant plus a register, 1154: the sum of two registers, or a register indirect, possibly with an 1155: auto-increment. For DFmode and DImode with an constant plus register, 1156: we must ensure that both words are addressable. */ 1157: 1158: #define LEGITIMATE_CONSTANT_POOL_BASE_P(X) \ 1159: (GET_CODE (X) == SYMBOL_REF && CONSTANT_POOL_ADDRESS_P (X) \ 1160: && ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (get_pool_constant (X))) 1161: 1162: #define LEGITIMATE_CONSTANT_POOL_ADDRESS_P(X) \ 1163: (LEGITIMATE_CONSTANT_POOL_BASE_P (X) \ 1164: || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \ 1165: && GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT \ 1166: && LEGITIMATE_CONSTANT_POOL_BASE_P (XEXP (XEXP (X, 0), 0)))) 1167: 1168: #define LEGITIMATE_ADDRESS_INTEGER_P(X,OFFSET) \ 1169: (GET_CODE (X) == CONST_INT \ 1170: && (unsigned) (INTVAL (X) + (OFFSET) + 0x8000) < 0x10000) 1171: 1172: #define LEGITIMATE_OFFSET_ADDRESS_P(MODE,X) \ 1173: (GET_CODE (X) == PLUS \ 1174: && GET_CODE (XEXP (X, 0)) == REG \ 1175: && REG_OK_FOR_BASE_P (XEXP (X, 0)) \ 1176: && LEGITIMATE_ADDRESS_INTEGER_P (XEXP (X, 1), 0) \ 1177: && (((MODE) != DFmode && (MODE) != DImode) \ 1178: || LEGITIMATE_ADDRESS_INTEGER_P (XEXP (X, 1), 4))) 1179: 1180: #define LEGITIMATE_INDEXED_ADDRESS_P(X) \ 1181: (GET_CODE (X) == PLUS \ 1182: && GET_CODE (XEXP (X, 0)) == REG \ 1183: && GET_CODE (XEXP (X, 1)) == REG \ 1184: && ((REG_OK_FOR_BASE_P (XEXP (X, 0)) \ 1185: && REG_OK_FOR_INDEX_P (XEXP (X, 1))) \ 1186: || (REG_OK_FOR_BASE_P (XEXP (X, 1)) \ 1187: && REG_OK_FOR_INDEX_P (XEXP (X, 0))))) 1188: 1189: #define LEGITIMATE_INDIRECT_ADDRESS_P(X) \ 1190: (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X)) 1191: 1192: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \ 1193: { if (LEGITIMATE_INDIRECT_ADDRESS_P (X)) \ 1194: goto ADDR; \ 1195: if (GET_CODE (X) == PRE_INC \ 1196: && LEGITIMATE_INDIRECT_ADDRESS_P (XEXP (X, 0))) \ 1197: goto ADDR; \ 1198: if (GET_CODE (X) == PRE_DEC \ 1199: && LEGITIMATE_INDIRECT_ADDRESS_P (XEXP (X, 0))) \ 1200: goto ADDR; \ 1201: if (LEGITIMATE_CONSTANT_POOL_ADDRESS_P (X)) \ 1202: goto ADDR; \ 1203: if (LEGITIMATE_OFFSET_ADDRESS_P (MODE, X)) \ 1204: goto ADDR; \ 1205: if ((MODE) != DImode && (MODE) != TImode \ 1206: && LEGITIMATE_INDEXED_ADDRESS_P (X)) \ 1207: goto ADDR; \ 1208: } 1209: 1210: /* Try machine-dependent ways of modifying an illegitimate address 1211: to be legitimate. If we find one, return the new, valid address. 1212: This macro is used in only one place: `memory_address' in explow.c. 1213: 1214: OLDX is the address as it was before break_out_memory_refs was called. 1215: In some cases it is useful to look at this to decide what needs to be done. 1216: 1217: MODE and WIN are passed so that this macro can use 1218: GO_IF_LEGITIMATE_ADDRESS. 1219: 1220: It is always safe for this macro to do nothing. It exists to recognize 1221: opportunities to optimize the output. 1222: 1223: On RS/6000, first check for the sum of a register with a constant 1224: integer that is out of range. If so, generate code to add the 1225: constant with the low-order 16 bits masked to the register and force 1226: this result into another register (this can be done with `cau'). 1227: Then generate an address of REG+(CONST&0xffff), allowing for the 1228: possibility of bit 16 being a one. 1229: 1230: Then check for the sum of a register and something not constant, try to 1231: load the other things into a register and return the sum. */ 1232: 1233: #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) \ 1234: { if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == REG \ 1235: && GET_CODE (XEXP (X, 1)) == CONST_INT \ 1236: && (unsigned) (INTVAL (XEXP (X, 1)) + 0x8000) >= 0x10000) \ 1237: { int high_int, low_int; \ 1238: high_int = INTVAL (XEXP (X, 1)) >> 16; \ 1239: low_int = INTVAL (XEXP (X, 1)) & 0xffff; \ 1240: if (low_int & 0x8000) \ 1241: high_int += 1, low_int |= 0xffff0000; \ 1242: (X) = gen_rtx (PLUS, SImode, \ 1243: force_operand \ 1244: (gen_rtx (PLUS, SImode, XEXP (X, 0), \ 1245: gen_rtx (CONST_INT, VOIDmode, \ 1246: high_int << 16)), 0),\ 1247: gen_rtx (CONST_INT, VOIDmode, low_int)); \ 1248: goto WIN; \ 1249: } \ 1250: else if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == REG \ 1251: && GET_CODE (XEXP (X, 1)) != CONST_INT \ 1252: && (MODE) != DImode && (MODE) != TImode) \ 1253: { \ 1254: (X) = gen_rtx (PLUS, SImode, XEXP (X, 0), \ 1255: force_reg (SImode, force_operand (XEXP (X, 1), 0))); \ 1256: goto WIN; \ 1257: } \ 1258: } 1259: 1260: /* Go to LABEL if ADDR (a legitimate address expression) 1261: has an effect that depends on the machine mode it is used for. 1262: 1263: On the RS/6000 this is true if the address is valid with a zero offset 1264: but not with an offset of four (this means it cannot be used as an 1265: address for DImode or DFmode) or is a pre-increment or decrement. Since 1266: we know it is valid, we just check for an address that is not valid with 1267: an offset of four. */ 1268: 1269: #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \ 1270: { if (GET_CODE (ADDR) == PLUS \ 1271: && LEGITIMATE_ADDRESS_INTEGER_P (XEXP (ADDR, 1), 0) \ 1272: && ! LEGITIMATE_ADDRESS_INTEGER_P (XEXP (ADDR, 1), 4)) \ 1273: goto LABEL; \ 1274: if (GET_CODE (ADDR) == PRE_INC) \ 1275: goto LABEL; \ 1276: if (GET_CODE (ADDR) == PRE_DEC) \ 1277: goto LABEL; \ 1278: } 1279: 1280: /* Define this if some processing needs to be done immediately before 1281: emitting code for an insn. */ 1282: 1283: /* #define FINAL_PRESCAN_INSN(INSN,OPERANDS,NOPERANDS) */ 1284: 1285: /* Specify the machine mode that this machine uses 1286: for the index in the tablejump instruction. */ 1287: #define CASE_VECTOR_MODE SImode 1288: 1289: /* Define this if the tablejump instruction expects the table 1290: to contain offsets from the address of the table. 1291: Do not define this if the table should contain absolute addresses. */ 1292: #define CASE_VECTOR_PC_RELATIVE 1293: 1294: /* Specify the tree operation to be used to convert reals to integers. */ 1295: #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR 1296: 1297: /* This is the kind of divide that is easiest to do in the general case. */ 1298: #define EASY_DIV_EXPR TRUNC_DIV_EXPR 1299: 1300: /* Define this as 1 if `char' should by default be signed; else as 0. */ 1301: #define DEFAULT_SIGNED_CHAR 0 1302: 1303: /* This flag, if defined, says the same insns that convert to a signed fixnum 1304: also convert validly to an unsigned one. */ 1305: 1306: /* #define FIXUNS_TRUNC_LIKE_FIX_TRUNC */ 1307: 1308: /* Max number of bytes we can move from memory to memory 1309: in one reasonably fast instruction. */ 1310: #define MOVE_MAX 16 1311: 1312: /* Nonzero if access to memory by bytes is no faster than for words. 1313: Also non-zero if doing byte operations (specifically shifts) in registers 1314: is undesirable. */ 1315: #define SLOW_BYTE_ACCESS 1 1316: 1.1.1.2 ! root 1317: /* Define if operations between registers always perform the operation ! 1318: on the full register even if a narrower mode is specified. */ ! 1319: #define WORD_REGISTER_OPERATIONS ! 1320: ! 1321: /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD ! 1322: will either zero-extend or sign-extend. The value of this macro should ! 1323: be the code that says which one of the two operations is implicitly ! 1324: done, NIL if none. */ ! 1325: #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND 1.1 root 1326: 1327: /* Define if loading short immediate values into registers sign extends. */ 1328: #define SHORT_IMMEDIATES_SIGN_EXTEND 1329: 1330: /* The RS/6000 uses the XCOFF format. */ 1331: 1332: #define XCOFF_DEBUGGING_INFO 1333: 1334: /* Define if the object format being used is COFF or a superset. */ 1335: #define OBJECT_FORMAT_COFF 1336: 1337: /* Define the magic numbers that we recognize as COFF. */ 1338: 1339: #define MY_ISCOFF(magic) \ 1340: ((magic) == U802WRMAGIC || (magic) == U802ROMAGIC || (magic) == U802TOCMAGIC) 1341: 1342: /* This is the only version of nm that collect2 can work with. */ 1343: #define REAL_NM_FILE_NAME "/usr/ucb/nm" 1344: 1345: /* We don't have GAS for the RS/6000 yet, so don't write out special 1346: .stabs in cc1plus. */ 1347: 1348: #define FASCIST_ASSEMBLER 1349: 1350: /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits 1351: is done just by pretending it is already truncated. */ 1352: #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 1353: 1354: /* Specify the machine mode that pointers have. 1355: After generation of rtl, the compiler makes no further distinction 1356: between pointers and any other objects of this machine mode. */ 1357: #define Pmode SImode 1358: 1359: /* Mode of a function address in a call instruction (for indexing purposes). 1360: 1361: Doesn't matter on RS/6000. */ 1362: #define FUNCTION_MODE SImode 1363: 1364: /* Define this if addresses of constant functions 1365: shouldn't be put through pseudo regs where they can be cse'd. 1366: Desirable on machines where ordinary constants are expensive 1367: but a CALL with constant address is cheap. */ 1368: #define NO_FUNCTION_CSE 1369: 1.1.1.2 ! root 1370: /* Define this to be nonzero if shift instructions ignore all but the low-order ! 1371: few bits. ! 1372: ! 1373: The sle and sre instructions which allow SHIFT_COUNT_TRUNCATED ! 1374: have been dropped from the PowerPC architecture. */ ! 1375: ! 1376: #define SHIFT_COUNT_TRUNCATED TARGET_POWER ? 1 : 0 1.1 root 1377: 1378: /* Use atexit for static constructors/destructors, instead of defining 1379: our own exit function. */ 1380: #define HAVE_ATEXIT 1381: 1382: /* Compute the cost of computing a constant rtl expression RTX 1383: whose rtx-code is CODE. The body of this macro is a portion 1384: of a switch statement. If the code is computed here, 1385: return it with a return statement. Otherwise, break from the switch. 1386: 1387: On the RS/6000, if it is legal in the insn, it is free. So this 1388: always returns 0. */ 1389: 1390: #define CONST_COSTS(RTX,CODE,OUTER_CODE) \ 1391: case CONST_INT: \ 1392: case CONST: \ 1393: case LABEL_REF: \ 1394: case SYMBOL_REF: \ 1395: case CONST_DOUBLE: \ 1396: return 0; 1397: 1398: /* Provide the costs of a rtl expression. This is in the body of a 1399: switch on CODE. */ 1400: 1401: #define RTX_COSTS(X,CODE,OUTER_CODE) \ 1402: case MULT: \ 1403: return (GET_CODE (XEXP (X, 1)) != CONST_INT \ 1404: ? COSTS_N_INSNS (5) \ 1405: : INTVAL (XEXP (X, 1)) >= -256 && INTVAL (XEXP (X, 1)) <= 255 \ 1406: ? COSTS_N_INSNS (3) : COSTS_N_INSNS (4)); \ 1407: case DIV: \ 1408: case MOD: \ 1409: if (GET_CODE (XEXP (X, 1)) == CONST_INT \ 1410: && exact_log2 (INTVAL (XEXP (X, 1))) >= 0) \ 1411: return COSTS_N_INSNS (2); \ 1412: /* otherwise fall through to normal divide. */ \ 1413: case UDIV: \ 1414: case UMOD: \ 1415: return COSTS_N_INSNS (19); \ 1416: case MEM: \ 1417: /* MEM should be slightly more expensive than (plus (reg) (const)) */ \ 1418: return 5; 1419: 1420: /* Compute the cost of an address. This is meant to approximate the size 1421: and/or execution delay of an insn using that address. If the cost is 1422: approximated by the RTL complexity, including CONST_COSTS above, as 1423: is usually the case for CISC machines, this macro should not be defined. 1424: For aggressively RISCy machines, only one insn format is allowed, so 1425: this macro should be a constant. The value of this macro only matters 1426: for valid addresses. 1427: 1428: For the RS/6000, everything is cost 0. */ 1429: 1430: #define ADDRESS_COST(RTX) 0 1431: 1432: /* Adjust the length of an INSN. LENGTH is the currently-computed length and 1433: should be adjusted to reflect any required changes. This macro is used when 1434: there is some systematic length adjustment required that would be difficult 1435: to express in the length attribute. */ 1436: 1437: /* #define ADJUST_INSN_LENGTH(X,LENGTH) */ 1438: 1439: /* Add any extra modes needed to represent the condition code. 1440: 1441: For the RS/6000, we need separate modes when unsigned (logical) comparisons 1442: are being done and we need a separate mode for floating-point. We also 1443: use a mode for the case when we are comparing the results of two 1444: comparisons. */ 1445: 1446: #define EXTRA_CC_MODES CCUNSmode, CCFPmode, CCEQmode 1447: 1448: /* Define the names for the modes specified above. */ 1449: #define EXTRA_CC_NAMES "CCUNS", "CCFP", "CCEQ" 1450: 1451: /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE, 1452: return the mode to be used for the comparison. For floating-point, CCFPmode 1453: should be used. CCUNSmode should be used for unsigned comparisons. 1454: CCEQmode should be used when we are doing an inequality comparison on 1455: the result of a comparison. CCmode should be used in all other cases. */ 1456: 1457: #define SELECT_CC_MODE(OP,X,Y) \ 1458: (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT ? CCFPmode \ 1459: : (OP) == GTU || (OP) == LTU || (OP) == GEU || (OP) == LEU ? CCUNSmode \ 1460: : (((OP) == EQ || (OP) == NE) && GET_RTX_CLASS (GET_CODE (X)) == '<' \ 1461: ? CCEQmode : CCmode)) 1462: 1463: /* Define the information needed to generate branch and scc insns. This is 1464: stored from the compare operation. Note that we can't use "rtx" here 1465: since it hasn't been defined! */ 1466: 1467: extern struct rtx_def *rs6000_compare_op0, *rs6000_compare_op1; 1468: extern int rs6000_compare_fp_p; 1469: 1470: /* Set to non-zero by "fix" operation to indicate that itrunc and 1471: uitrunc must be defined. */ 1472: 1473: extern int rs6000_trunc_used; 1474: 1475: /* Control the assembler format that we output. */ 1476: 1477: /* Output at beginning of assembler file. 1478: 1479: Initialize the section names for the RS/6000 at this point. 1480: 1.1.1.2 ! root 1481: Specify filename to assembler. ! 1482: 1.1 root 1483: We want to go into the TOC section so at least one .toc will be emitted. 1484: Also, in order to output proper .bs/.es pairs, we need at least one static 1485: [RW] section emitted. 1486: 1487: We then switch back to text to force the gcc2_compiled. label and the space 1488: allocated after it (when profiling) into the text section. 1489: 1490: Finally, declare mcount when profiling to make the assembler happy. */ 1491: 1492: #define ASM_FILE_START(FILE) \ 1493: { \ 1494: rs6000_gen_section_name (&xcoff_bss_section_name, \ 1495: main_input_filename, ".bss_"); \ 1496: rs6000_gen_section_name (&xcoff_private_data_section_name, \ 1497: main_input_filename, ".rw_"); \ 1498: rs6000_gen_section_name (&xcoff_read_only_section_name, \ 1499: main_input_filename, ".ro_"); \ 1500: \ 1.1.1.2 ! root 1501: output_file_directive (FILE, main_input_filename); \ 1.1 root 1502: toc_section (); \ 1503: if (write_symbols != NO_DEBUG) \ 1504: private_data_section (); \ 1505: text_section (); \ 1506: if (profile_flag) \ 1507: fprintf (FILE, "\t.extern .mcount\n"); \ 1508: } 1509: 1510: /* Output at end of assembler file. 1511: 1512: On the RS/6000, referencing data should automatically pull in text. */ 1513: 1514: #define ASM_FILE_END(FILE) \ 1515: { \ 1516: text_section (); \ 1517: fprintf (FILE, "_section_.text:\n"); \ 1518: data_section (); \ 1519: fprintf (FILE, "\t.long _section_.text\n"); \ 1520: } 1521: 1522: /* We define this to prevent the name mangler from putting dollar signs into 1523: function names. */ 1524: 1525: #define NO_DOLLAR_IN_LABEL 1526: 1527: /* We define this to 0 so that gcc will never accept a dollar sign in a 1528: variable name. This is needed because the AIX assembler will not accept 1529: dollar signs. */ 1530: 1531: #define DOLLARS_IN_IDENTIFIERS 0 1532: 1533: /* Implicit library calls should use memcpy, not bcopy, etc. */ 1534: 1535: #define TARGET_MEM_FUNCTIONS 1536: 1537: /* Define the extra sections we need. We define three: one is the read-only 1538: data section which is used for constants. This is a csect whose name is 1539: derived from the name of the input file. The second is for initialized 1540: global variables. This is a csect whose name is that of the variable. 1541: The third is the TOC. */ 1542: 1543: #define EXTRA_SECTIONS \ 1544: read_only_data, private_data, read_only_private_data, toc, bss 1545: 1546: /* Define the name of our readonly data section. */ 1547: 1548: #define READONLY_DATA_SECTION read_only_data_section 1549: 1.1.1.2 ! root 1550: /* If we are referencing a function that is static or is known to be ! 1551: in this file, make the SYMBOL_REF special. We can use this to indicate ! 1552: that we can branch to this function without emitting a no-op after the ! 1553: call. */ ! 1554: ! 1555: #define ENCODE_SECTION_INFO(DECL) \ ! 1556: if (TREE_CODE (DECL) == FUNCTION_DECL \ ! 1557: && (TREE_ASM_WRITTEN (DECL) || ! TREE_PUBLIC (DECL))) \ ! 1558: SYMBOL_REF_FLAG (XEXP (DECL_RTL (DECL), 0)) = 1; ! 1559: 1.1 root 1560: /* Indicate that jump tables go in the text section. */ 1561: 1562: #define JUMP_TABLES_IN_TEXT_SECTION 1563: 1564: /* Define the routines to implement these extra sections. */ 1565: 1566: #define EXTRA_SECTION_FUNCTIONS \ 1567: \ 1568: void \ 1569: read_only_data_section () \ 1570: { \ 1571: if (in_section != read_only_data) \ 1572: { \ 1573: fprintf (asm_out_file, ".csect %s[RO]\n", \ 1574: xcoff_read_only_section_name); \ 1575: in_section = read_only_data; \ 1576: } \ 1577: } \ 1578: \ 1579: void \ 1580: private_data_section () \ 1581: { \ 1582: if (in_section != private_data) \ 1583: { \ 1584: fprintf (asm_out_file, ".csect %s[RW]\n", \ 1585: xcoff_private_data_section_name); \ 1586: \ 1587: in_section = private_data; \ 1588: } \ 1589: } \ 1590: \ 1591: void \ 1592: read_only_private_data_section () \ 1593: { \ 1594: if (in_section != read_only_private_data) \ 1595: { \ 1596: fprintf (asm_out_file, ".csect %s[RO]\n", \ 1597: xcoff_private_data_section_name); \ 1598: in_section = read_only_private_data; \ 1599: } \ 1600: } \ 1601: \ 1602: void \ 1603: toc_section () \ 1604: { \ 1.1.1.2 ! root 1605: if (TARGET_MINIMAL_TOC) \ ! 1606: { \ ! 1607: static int toc_initialized = 0; \ ! 1608: \ ! 1609: /* toc_section is always called at least once from ASM_FILE_START, \ ! 1610: so this is guaranteed to always be defined once and only once \ ! 1611: in each file. */ \ ! 1612: if (! toc_initialized) \ ! 1613: { \ ! 1614: fprintf (asm_out_file, ".toc\nLCTOC..0:\n"); \ ! 1615: fprintf (asm_out_file, "\t.tc toc_table[TC],toc_table[RW]\n"); \ ! 1616: toc_initialized = 1; \ ! 1617: } \ 1.1 root 1618: \ 1.1.1.2 ! root 1619: if (in_section != toc) \ ! 1620: fprintf (asm_out_file, ".csect toc_table[RW]\n"); \ ! 1621: } \ ! 1622: else \ ! 1623: { \ ! 1624: if (in_section != toc) \ ! 1625: fprintf (asm_out_file, ".toc\n"); \ ! 1626: } \ 1.1 root 1627: in_section = toc; \ 1628: } 1629: 1630: /* This macro produces the initial definition of a function name. 1631: On the RS/6000, we need to place an extra '.' in the function name and 1632: output the function descriptor. 1633: 1634: The csect for the function will have already been created by the 1635: `text_section' call previously done. We do have to go back to that 1636: csect, however. */ 1637: 1638: /* ??? What do the 16 and 044 in the .function line really mean? */ 1639: 1640: #define ASM_DECLARE_FUNCTION_NAME(FILE,NAME,DECL) \ 1641: { if (TREE_PUBLIC (DECL)) \ 1642: { \ 1643: fprintf (FILE, "\t.globl ."); \ 1644: RS6000_OUTPUT_BASENAME (FILE, NAME); \ 1645: fprintf (FILE, "\n"); \ 1646: } \ 1647: else if (write_symbols == XCOFF_DEBUG) \ 1648: { \ 1649: fprintf (FILE, "\t.lglobl ."); \ 1650: RS6000_OUTPUT_BASENAME (FILE, NAME); \ 1651: fprintf (FILE, "\n"); \ 1652: } \ 1653: fprintf (FILE, ".csect "); \ 1654: RS6000_OUTPUT_BASENAME (FILE, NAME); \ 1655: fprintf (FILE, "[DS]\n"); \ 1656: RS6000_OUTPUT_BASENAME (FILE, NAME); \ 1657: fprintf (FILE, ":\n"); \ 1658: fprintf (FILE, "\t.long ."); \ 1659: RS6000_OUTPUT_BASENAME (FILE, NAME); \ 1660: fprintf (FILE, ", TOC[tc0], 0\n"); \ 1.1.1.2 ! root 1661: fprintf (FILE, ".csect .text[PR]\n."); \ 1.1 root 1662: RS6000_OUTPUT_BASENAME (FILE, NAME); \ 1663: fprintf (FILE, ":\n"); \ 1664: if (write_symbols == XCOFF_DEBUG) \ 1665: xcoffout_declare_function (FILE, DECL, NAME); \ 1666: } 1667: 1668: /* Return non-zero if this entry is to be written into the constant pool 1669: in a special way. We do so if this is a SYMBOL_REF, LABEL_REF or a CONST 1670: containing one of them. If -mfp-in-toc (the default), we also do 1671: this for floating-point constants. We actually can only do this 1672: if the FP formats of the target and host machines are the same, but 1673: we can't check that since not every file that uses 1674: GO_IF_LEGITIMATE_ADDRESS_P includes real.h. */ 1675: 1676: #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X) \ 1677: (GET_CODE (X) == SYMBOL_REF \ 1678: || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \ 1679: && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF) \ 1680: || GET_CODE (X) == LABEL_REF \ 1.1.1.2 ! root 1681: || (! (TARGET_NO_FP_IN_TOC && ! TARGET_MINIMAL_TOC) \ ! 1682: && GET_CODE (X) == CONST_DOUBLE \ 1.1 root 1683: && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \ 1684: && BITS_PER_WORD == HOST_BITS_PER_INT)) 1685: 1686: /* Select section for constant in constant pool. 1687: 1688: On RS/6000, all constants are in the private read-only data area. 1689: However, if this is being placed in the TOC it must be output as a 1690: toc entry. */ 1691: 1692: #define SELECT_RTX_SECTION(MODE, X) \ 1693: { if (ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (X)) \ 1694: toc_section (); \ 1695: else \ 1696: read_only_private_data_section (); \ 1697: } 1698: 1699: /* Macro to output a special constant pool entry. Go to WIN if we output 1700: it. Otherwise, it is written the usual way. 1701: 1702: On the RS/6000, toc entries are handled this way. */ 1703: 1704: #define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE, X, MODE, ALIGN, LABELNO, WIN) \ 1705: { if (ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (X)) \ 1706: { \ 1707: output_toc (FILE, X, LABELNO); \ 1708: goto WIN; \ 1709: } \ 1710: } 1711: 1712: /* Select the section for an initialized data object. 1713: 1714: On the RS/6000, we have a special section for all variables except those 1715: that are static. */ 1716: 1717: #define SELECT_SECTION(EXP,RELOC) \ 1718: { \ 1719: if ((TREE_READONLY (EXP) \ 1720: || (TREE_CODE (EXP) == STRING_CST \ 1721: && !flag_writable_strings)) \ 1722: && ! TREE_THIS_VOLATILE (EXP) \ 1723: && ! (RELOC)) \ 1724: { \ 1725: if (TREE_PUBLIC (EXP)) \ 1726: read_only_data_section (); \ 1727: else \ 1728: read_only_private_data_section (); \ 1729: } \ 1730: else \ 1731: { \ 1732: if (TREE_PUBLIC (EXP)) \ 1733: data_section (); \ 1734: else \ 1735: private_data_section (); \ 1736: } \ 1737: } 1738: 1739: /* This outputs NAME to FILE up to the first null or '['. */ 1740: 1741: #define RS6000_OUTPUT_BASENAME(FILE, NAME) \ 1742: if ((NAME)[0] == '*') \ 1743: assemble_name (FILE, NAME); \ 1744: else \ 1745: { \ 1746: char *_p; \ 1747: for (_p = (NAME); *_p && *_p != '['; _p++) \ 1748: fputc (*_p, FILE); \ 1749: } 1750: 1751: /* Output something to declare an external symbol to the assembler. Most 1752: assemblers don't need this. 1753: 1754: If we haven't already, add "[RW]" (or "[DS]" for a function) to the 1755: name. Normally we write this out along with the name. In the few cases 1756: where we can't, it gets stripped off. */ 1757: 1758: #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \ 1759: { rtx _symref = XEXP (DECL_RTL (DECL), 0); \ 1760: if ((TREE_CODE (DECL) == VAR_DECL \ 1761: || TREE_CODE (DECL) == FUNCTION_DECL) \ 1762: && (NAME)[0] != '*' \ 1763: && (NAME)[strlen (NAME) - 1] != ']') \ 1764: { \ 1765: char *_name = (char *) permalloc (strlen (XSTR (_symref, 0)) + 5); \ 1766: strcpy (_name, XSTR (_symref, 0)); \ 1767: strcat (_name, TREE_CODE (DECL) == FUNCTION_DECL ? "[DS]" : "[RW]"); \ 1768: XSTR (_symref, 0) = _name; \ 1769: } \ 1770: fprintf (FILE, "\t.extern "); \ 1771: assemble_name (FILE, XSTR (_symref, 0)); \ 1772: if (TREE_CODE (DECL) == FUNCTION_DECL) \ 1773: { \ 1774: fprintf (FILE, "\n\t.extern ."); \ 1775: RS6000_OUTPUT_BASENAME (FILE, XSTR (_symref, 0)); \ 1776: } \ 1777: fprintf (FILE, "\n"); \ 1778: } 1779: 1780: /* Similar, but for libcall. We only have to worry about the function name, 1781: not that of the descriptor. */ 1782: 1783: #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \ 1784: { fprintf (FILE, "\t.extern ."); \ 1785: assemble_name (FILE, XSTR (FUN, 0)); \ 1786: fprintf (FILE, "\n"); \ 1787: } 1788: 1789: /* Output to assembler file text saying following lines 1790: may contain character constants, extra white space, comments, etc. */ 1791: 1792: #define ASM_APP_ON "" 1793: 1794: /* Output to assembler file text saying following lines 1795: no longer contain unusual constructs. */ 1796: 1797: #define ASM_APP_OFF "" 1798: 1799: /* Output before instructions. */ 1800: 1.1.1.2 ! root 1801: #define TEXT_SECTION_ASM_OP ".csect .text[PR]" 1.1 root 1802: 1803: /* Output before writable data. */ 1804: 1805: #define DATA_SECTION_ASM_OP ".csect .data[RW]" 1806: 1807: /* How to refer to registers in assembler output. 1808: This sequence is indexed by compiler's hard-register-number (see above). */ 1809: 1810: #define REGISTER_NAMES \ 1811: {"0", "1", "2", "3", "4", "5", "6", "7", \ 1812: "8", "9", "10", "11", "12", "13", "14", "15", \ 1813: "16", "17", "18", "19", "20", "21", "22", "23", \ 1814: "24", "25", "26", "27", "28", "29", "30", "31", \ 1815: "0", "1", "2", "3", "4", "5", "6", "7", \ 1816: "8", "9", "10", "11", "12", "13", "14", "15", \ 1817: "16", "17", "18", "19", "20", "21", "22", "23", \ 1818: "24", "25", "26", "27", "28", "29", "30", "31", \ 1819: "mq", "lr", "ctr", "ap", \ 1820: "0", "1", "2", "3", "4", "5", "6", "7" } 1821: 1822: /* Table of additional register names to use in user input. */ 1823: 1824: #define ADDITIONAL_REGISTER_NAMES \ 1825: {"r0", 0, "r1", 1, "r2", 2, "r3", 3, \ 1826: "r4", 4, "r5", 5, "r6", 6, "r7", 7, \ 1827: "r8", 8, "r9", 9, "r10", 10, "r11", 11, \ 1828: "r12", 12, "r13", 13, "r14", 14, "r15", 15, \ 1829: "r16", 16, "r17", 17, "r18", 18, "r19", 19, \ 1830: "r20", 20, "r21", 21, "r22", 22, "r23", 23, \ 1831: "r24", 24, "r25", 25, "r26", 26, "r27", 27, \ 1832: "r28", 28, "r29", 29, "r30", 30, "r31", 31, \ 1833: "fr0", 32, "fr1", 33, "fr2", 34, "fr3", 35, \ 1834: "fr4", 36, "fr5", 37, "fr6", 38, "fr7", 39, \ 1835: "fr8", 40, "fr9", 41, "fr10", 42, "fr11", 43, \ 1836: "fr12", 44, "fr13", 45, "fr14", 46, "fr15", 47, \ 1837: "fr16", 48, "fr17", 49, "fr18", 50, "fr19", 51, \ 1838: "fr20", 52, "fr21", 53, "fr22", 54, "fr23", 55, \ 1839: "fr24", 56, "fr25", 57, "fr26", 58, "fr27", 59, \ 1840: "fr28", 60, "fr29", 61, "fr30", 62, "fr31", 63, \ 1841: /* no additional names for: mq, lr, ctr, ap */ \ 1842: "cr0", 68, "cr1", 69, "cr2", 70, "cr3", 71, \ 1843: "cr4", 72, "cr5", 73, "cr6", 74, "cr7", 75, \ 1844: "cc", 68 } 1845: 1846: /* How to renumber registers for dbx and gdb. */ 1847: 1848: #define DBX_REGISTER_NUMBER(REGNO) (REGNO) 1849: 1.1.1.2 ! root 1850: /* Text to write out after a CALL that may be replaced by glue code by ! 1851: the loader. This depends on the AIX version. */ ! 1852: #define RS6000_CALL_GLUE "cror 31,31,31" ! 1853: 1.1 root 1854: /* This is how to output the definition of a user-level label named NAME, 1855: such as the label on a static function or variable NAME. */ 1856: 1857: #define ASM_OUTPUT_LABEL(FILE,NAME) \ 1858: do { RS6000_OUTPUT_BASENAME (FILE, NAME); fputs (":\n", FILE); } while (0) 1859: 1860: /* This is how to output a command to make the user-level label named NAME 1861: defined for reference from other files. */ 1862: 1863: #define ASM_GLOBALIZE_LABEL(FILE,NAME) \ 1864: do { fputs ("\t.globl ", FILE); \ 1865: RS6000_OUTPUT_BASENAME (FILE, NAME); fputs ("\n", FILE);} while (0) 1866: 1867: /* This is how to output a reference to a user-level label named NAME. 1868: `assemble_name' uses this. */ 1869: 1870: #define ASM_OUTPUT_LABELREF(FILE,NAME) \ 1871: fprintf (FILE, NAME) 1872: 1873: /* This is how to output an internal numbered label where 1874: PREFIX is the class of label and NUM is the number within the class. */ 1875: 1876: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM) \ 1877: fprintf (FILE, "%s..%d:\n", PREFIX, NUM) 1878: 1879: /* This is how to output a label for a jump table. Arguments are the same as 1880: for ASM_OUTPUT_INTERNAL_LABEL, except the insn for the jump table is 1881: passed. */ 1882: 1883: #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN) \ 1884: { ASM_OUTPUT_ALIGN (FILE, 2); ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); } 1885: 1886: /* This is how to store into the string LABEL 1887: the symbol_ref name of an internal numbered label where 1888: PREFIX is the class of label and NUM is the number within the class. 1889: This is suitable for output with `assemble_name'. */ 1890: 1891: #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ 1892: sprintf (LABEL, "%s..%d", PREFIX, NUM) 1893: 1894: /* This is how to output an assembler line defining a `double' constant. */ 1895: 1.1.1.2 ! root 1896: #define ASM_OUTPUT_DOUBLE(FILE, VALUE) \ ! 1897: { \ ! 1898: if (REAL_VALUE_ISINF (VALUE) \ ! 1899: || REAL_VALUE_ISNAN (VALUE) \ ! 1900: || REAL_VALUE_MINUS_ZERO (VALUE)) \ ! 1901: { \ ! 1902: long t[2]; \ ! 1903: REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), t); \ ! 1904: fprintf (FILE, "\t.long 0x%lx\n\t.long 0x%lx\n", \ ! 1905: t[0] & 0xffffffff, t[1] & 0xffffffff); \ ! 1906: } \ ! 1907: else \ ! 1908: { \ ! 1909: char str[30]; \ ! 1910: REAL_VALUE_TO_DECIMAL (VALUE, "%.20e", str); \ ! 1911: fprintf (FILE, "\t.double 0d%s\n", str); \ ! 1912: } \ ! 1913: } 1.1 root 1914: 1915: /* This is how to output an assembler line defining a `float' constant. */ 1916: 1.1.1.2 ! root 1917: #define ASM_OUTPUT_FLOAT(FILE, VALUE) \ ! 1918: { \ ! 1919: if (REAL_VALUE_ISINF (VALUE) \ ! 1920: || REAL_VALUE_ISNAN (VALUE) \ ! 1921: || REAL_VALUE_MINUS_ZERO (VALUE)) \ ! 1922: { \ ! 1923: long t; \ ! 1924: REAL_VALUE_TO_TARGET_SINGLE ((VALUE), t); \ ! 1925: fprintf (FILE, "\t.long 0x%lx\n", t & 0xffffffff); \ ! 1926: } \ ! 1927: else \ ! 1928: { \ ! 1929: char str[30]; \ ! 1930: REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", str); \ ! 1931: fprintf (FILE, "\t.float 0d%s\n", str); \ ! 1932: } \ ! 1933: } 1.1 root 1934: 1935: /* This is how to output an assembler line defining an `int' constant. */ 1936: 1937: #define ASM_OUTPUT_INT(FILE,VALUE) \ 1938: ( fprintf (FILE, "\t.long "), \ 1939: output_addr_const (FILE, (VALUE)), \ 1940: fprintf (FILE, "\n")) 1941: 1942: /* Likewise for `char' and `short' constants. */ 1943: 1944: #define ASM_OUTPUT_SHORT(FILE,VALUE) \ 1945: ( fprintf (FILE, "\t.short "), \ 1946: output_addr_const (FILE, (VALUE)), \ 1947: fprintf (FILE, "\n")) 1948: 1949: #define ASM_OUTPUT_CHAR(FILE,VALUE) \ 1950: ( fprintf (FILE, "\t.byte "), \ 1951: output_addr_const (FILE, (VALUE)), \ 1952: fprintf (FILE, "\n")) 1953: 1954: /* This is how to output an assembler line for a numeric constant byte. */ 1955: 1956: #define ASM_OUTPUT_BYTE(FILE,VALUE) \ 1957: fprintf (FILE, "\t.byte 0x%x\n", (VALUE)) 1958: 1959: /* This is how to output an assembler line to define N characters starting 1960: at P to FILE. */ 1961: 1962: #define ASM_OUTPUT_ASCII(FILE, P, N) output_ascii ((FILE), (P), (N)) 1963: 1964: /* This is how to output code to push a register on the stack. 1965: It need not be very fast code. */ 1966: 1967: #define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \ 1.1.1.2 ! root 1968: asm_fprintf (FILE, "\{tstu|stwu} %s,-4(r1)\n", reg_names[REGNO]); 1.1 root 1969: 1970: /* This is how to output an insn to pop a register from the stack. 1971: It need not be very fast code. */ 1972: 1973: #define ASM_OUTPUT_REG_POP(FILE,REGNO) \ 1.1.1.2 ! root 1974: asm_fprintf (FILE, "\t{l|lwz} %s,0(r1)\n\t{ai|addic} r1,r1,4\n", \ ! 1975: reg_names[REGNO]) 1.1 root 1976: 1977: /* This is how to output an element of a case-vector that is absolute. 1978: (RS/6000 does not use such vectors, but we must define this macro 1979: anyway.) */ 1980: 1981: #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ 1982: fprintf (FILE, "\t.long L..%d\n", VALUE) 1983: 1984: /* This is how to output an element of a case-vector that is relative. */ 1985: 1986: #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL) \ 1987: fprintf (FILE, "\t.long L..%d-L..%d\n", VALUE, REL) 1988: 1989: /* This is how to output an assembler line 1990: that says to advance the location counter 1991: to a multiple of 2**LOG bytes. */ 1992: 1993: #define ASM_OUTPUT_ALIGN(FILE,LOG) \ 1994: if ((LOG) != 0) \ 1995: fprintf (FILE, "\t.align %d\n", (LOG)) 1996: 1997: #define ASM_OUTPUT_SKIP(FILE,SIZE) \ 1998: fprintf (FILE, "\t.space %d\n", (SIZE)) 1999: 2000: /* This says how to output an assembler line 2001: to define a global common symbol. */ 2002: 2003: #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ 2004: do { fputs (".comm ", (FILE)); \ 2005: RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \ 2006: fprintf ((FILE), ",%d\n", (SIZE)); } while (0) 2007: 2008: /* This says how to output an assembler line 2009: to define a local common symbol. */ 2010: 2011: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE,ROUNDED) \ 2012: do { fputs (".lcomm ", (FILE)); \ 2013: RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \ 2014: fprintf ((FILE), ",%d,%s\n", (SIZE), xcoff_bss_section_name); \ 2015: } while (0) 2016: 2017: /* Store in OUTPUT a string (made with alloca) containing 2018: an assembler-name for a local static variable named NAME. 2019: LABELNO is an integer which is different for each call. */ 2020: 2021: #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \ 2022: ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \ 2023: sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO))) 2024: 2025: /* Define the parentheses used to group arithmetic operations 2026: in assembler code. */ 2027: 2028: #define ASM_OPEN_PAREN "(" 2029: #define ASM_CLOSE_PAREN ")" 2030: 2031: /* Define results of standard character escape sequences. */ 2032: #define TARGET_BELL 007 2033: #define TARGET_BS 010 2034: #define TARGET_TAB 011 2035: #define TARGET_NEWLINE 012 2036: #define TARGET_VT 013 2037: #define TARGET_FF 014 2038: #define TARGET_CR 015 2039: 2040: /* Print operand X (an rtx) in assembler syntax to file FILE. 2041: CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified. 2042: For `%' followed by punctuation, CODE is the punctuation and X is null. */ 2043: 2044: #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE) 2045: 2046: /* Define which CODE values are valid. */ 2047: 1.1.1.2 ! root 2048: #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '.') 1.1 root 2049: 2050: /* Print a memory address as an operand to reference that memory location. */ 2051: 2052: #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR) 2053: 2054: /* Define the codes that are matched by predicates in rs6000.c. */ 2055: 2056: #define PREDICATE_CODES \ 2057: {"short_cint_operand", {CONST_INT}}, \ 2058: {"u_short_cint_operand", {CONST_INT}}, \ 2059: {"non_short_cint_operand", {CONST_INT}}, \ 2060: {"gpc_reg_operand", {SUBREG, REG}}, \ 2061: {"cc_reg_operand", {SUBREG, REG}}, \ 2062: {"reg_or_short_operand", {SUBREG, REG, CONST_INT}}, \ 2063: {"reg_or_neg_short_operand", {SUBREG, REG, CONST_INT}}, \ 2064: {"reg_or_u_short_operand", {SUBREG, REG, CONST_INT}}, \ 2065: {"reg_or_cint_operand", {SUBREG, REG, CONST_INT}}, \ 2066: {"easy_fp_constant", {CONST_DOUBLE}}, \ 2067: {"reg_or_mem_operand", {SUBREG, MEM, REG}}, \ 2068: {"fp_reg_or_mem_operand", {SUBREG, MEM, REG}}, \ 2069: {"mem_or_easy_const_operand", {SUBREG, MEM, CONST_DOUBLE}}, \ 2070: {"add_operand", {SUBREG, REG, CONST_INT}}, \ 2071: {"non_add_cint_operand", {CONST_INT}}, \ 2072: {"and_operand", {SUBREG, REG, CONST_INT}}, \ 2073: {"non_and_cint_operand", {CONST_INT}}, \ 2074: {"logical_operand", {SUBREG, REG, CONST_INT}}, \ 2075: {"non_logical_cint_operand", {CONST_INT}}, \ 2076: {"mask_operand", {CONST_INT}}, \ 2077: {"call_operand", {SYMBOL_REF, REG}}, \ 1.1.1.2 ! root 2078: {"current_file_function_operand", {SYMBOL_REF}}, \ 1.1 root 2079: {"input_operand", {SUBREG, MEM, REG, CONST_INT}}, \ 1.1.1.2 ! root 2080: {"load_multiple_operation", {PARALLEL}}, \ ! 2081: {"store_multiple_operation", {PARALLEL}}, \ ! 2082: {"branch_comparison_operator", {EQ, NE, LE, LT, GE, \ ! 2083: GT, LEU, LTU, GEU, GTU}}, \ ! 2084: {"scc_comparison_operator", {EQ, NE, LE, LT, GE, \ ! 2085: GT, LEU, LTU, GEU, GTU}},
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.