1 /* Definitions of target machine for GNU compiler, for the HP Spectrum. 2 Copyright (C) 1992-2020 Free Software Foundation, Inc. 3 Contributed by Michael Tiemann (tiemann@cygnus.com) of Cygnus Support 4 and Tim Moore (moore@defmacro.cs.utah.edu) of the Center for 5 Software Science at the University of Utah. 6 7 This file is part of GCC. 8 9 GCC is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3, or (at your option) 12 any later version. 13 14 GCC is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with GCC; see the file COPYING3. If not see 21 <http://www.gnu.org/licenses/>. */ 22 23 /* For long call handling. */ 24 extern unsigned long total_code_bytes; 25 26 #define pa_cpu_attr ((enum attr_cpu)pa_cpu) 27 28 #define TARGET_PA_10 (!TARGET_PA_11 && !TARGET_PA_20) 29 30 /* Generate code for the HPPA 2.0 architecture in 64bit mode. */ 31 #ifndef TARGET_64BIT 32 #define TARGET_64BIT 0 33 #endif 34 35 /* Generate code for ELF32 ABI. */ 36 #ifndef TARGET_ELF32 37 #define TARGET_ELF32 0 38 #endif 39 40 /* Generate code for SOM 32bit ABI. */ 41 #ifndef TARGET_SOM 42 #define TARGET_SOM 0 43 #endif 44 45 /* HP-UX UNIX features. */ 46 #ifndef TARGET_HPUX 47 #define TARGET_HPUX 0 48 #endif 49 50 /* HP-UX 10.10 UNIX 95 features. */ 51 #ifndef TARGET_HPUX_10_10 52 #define TARGET_HPUX_10_10 0 53 #endif 54 55 /* HP-UX 11.* features (11.00, 11.11, 11.23, etc.) */ 56 #ifndef TARGET_HPUX_11 57 #define TARGET_HPUX_11 0 58 #endif 59 60 /* HP-UX 11i multibyte and UNIX 98 extensions. */ 61 #ifndef TARGET_HPUX_11_11 62 #define TARGET_HPUX_11_11 0 63 #endif 64 65 /* HP-UX 11i multibyte and UNIX 2003 extensions. */ 66 #ifndef TARGET_HPUX_11_31 67 #define TARGET_HPUX_11_31 0 68 #endif 69 70 /* HP-UX long double library. */ 71 #ifndef HPUX_LONG_DOUBLE_LIBRARY 72 #define HPUX_LONG_DOUBLE_LIBRARY 0 73 #endif 74 75 /* Linux kernel atomic operation support. */ 76 #ifndef TARGET_SYNC_LIBCALL 77 #define TARGET_SYNC_LIBCALL 0 78 #endif 79 80 /* The following three defines are potential target switches. The current 81 defines are optimal given the current capabilities of GAS and GNU ld. */ 82 83 /* Define to a C expression evaluating to true to use long absolute calls. 84 Currently, only the HP assembler and SOM linker support long absolute 85 calls. They are used only in non-pic code. */ 86 #define TARGET_LONG_ABS_CALL (TARGET_SOM && !TARGET_GAS) 87 88 /* Define to a C expression evaluating to true to use long PIC symbol 89 difference calls. Long PIC symbol difference calls are only used with 90 the HP assembler and linker. The HP assembler detects this instruction 91 sequence and treats it as long pc-relative call. Currently, GAS only 92 allows a difference of two symbols in the same subspace, and it doesn't 93 detect the sequence as a pc-relative call. */ 94 #define TARGET_LONG_PIC_SDIFF_CALL (!TARGET_GAS && TARGET_HPUX) 95 96 /* Define to a C expression evaluating to true to use SOM secondary 97 definition symbols for weak support. Linker support for secondary 98 definition symbols is buggy prior to HP-UX 11.X. */ 99 #define TARGET_SOM_SDEF 0 100 101 /* Define to a C expression evaluating to true to save the entry value 102 of SP in the current frame marker. This is normally unnecessary. 103 However, the HP-UX unwind library looks at the SAVE_SP callinfo flag. 104 HP compilers don't use this flag but it is supported by the assembler. 105 We set this flag to indicate that register %r3 has been saved at the 106 start of the frame. Thus, when the HP unwind library is used, we 107 need to generate additional code to save SP into the frame marker. */ 108 #define TARGET_HPUX_UNWIND_LIBRARY 0 109 110 #ifndef TARGET_DEFAULT 111 #define TARGET_DEFAULT MASK_GAS 112 #endif 113 114 #ifndef TARGET_CPU_DEFAULT 115 #define TARGET_CPU_DEFAULT 0 116 #endif 117 118 #ifndef TARGET_SCHED_DEFAULT 119 #define TARGET_SCHED_DEFAULT PROCESSOR_8000 120 #endif 121 122 /* Support for a compile-time default CPU, et cetera. The rules are: 123 --with-schedule is ignored if -mschedule is specified. 124 --with-arch is ignored if -march is specified. */ 125 #define OPTION_DEFAULT_SPECS \ 126 {"arch", "%{!march=*:-march=%(VALUE)}" }, \ 127 {"schedule", "%{!mschedule=*:-mschedule=%(VALUE)}" } 128 129 /* Specify the dialect of assembler to use. New mnemonics is dialect one 130 and the old mnemonics are dialect zero. */ 131 #define ASSEMBLER_DIALECT (TARGET_PA_20 ? 1 : 0) 132 133 /* Override some settings from dbxelf.h. */ 134 135 /* We do not have to be compatible with dbx, so we enable gdb extensions 136 by default. */ 137 #define DEFAULT_GDB_EXTENSIONS 1 138 139 /* This used to be zero (no max length), but big enums and such can 140 cause huge strings which killed gas. 141 142 We also have to avoid lossage in dbxout.c -- it does not compute the 143 string size accurately, so we are real conservative here. */ 144 #undef DBX_CONTIN_LENGTH 145 #define DBX_CONTIN_LENGTH 3000 146 147 /* GDB always assumes the current function's frame begins at the value 148 of the stack pointer upon entry to the current function. Accessing 149 local variables and parameters passed on the stack is done using the 150 base of the frame + an offset provided by GCC. 151 152 For functions which have frame pointers this method works fine; 153 the (frame pointer) == (stack pointer at function entry) and GCC provides 154 an offset relative to the frame pointer. 155 156 This loses for functions without a frame pointer; GCC provides an offset 157 which is relative to the stack pointer after adjusting for the function's 158 frame size. GDB would prefer the offset to be relative to the value of 159 the stack pointer at the function's entry. Yuk! */ 160 #define DEBUGGER_AUTO_OFFSET(X) \ 161 ((GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0) \ 162 + (frame_pointer_needed ? 0 : pa_compute_frame_size (get_frame_size (), 0))) 163 164 #define DEBUGGER_ARG_OFFSET(OFFSET, X) \ 165 ((GET_CODE (X) == PLUS ? OFFSET : 0) \ 166 + (frame_pointer_needed ? 0 : pa_compute_frame_size (get_frame_size (), 0))) 167 168 #define TARGET_CPU_CPP_BUILTINS() \ 169 do { \ 170 builtin_assert("cpu=hppa"); \ 171 builtin_assert("machine=hppa"); \ 172 builtin_define("__hppa"); \ 173 builtin_define("__hppa__"); \ 174 builtin_define("__BIG_ENDIAN__"); \ 175 if (TARGET_PA_20) \ 176 builtin_define("_PA_RISC2_0"); \ 177 else if (TARGET_PA_11) \ 178 builtin_define("_PA_RISC1_1"); \ 179 else \ 180 builtin_define("_PA_RISC1_0"); \ 181 if (HPUX_LONG_DOUBLE_LIBRARY) \ 182 builtin_define("__SIZEOF_FLOAT128__=16"); \ 183 } while (0) 184 185 /* An old set of OS defines for various BSD-like systems. */ 186 #define TARGET_OS_CPP_BUILTINS() \ 187 do \ 188 { \ 189 builtin_define_std ("REVARGV"); \ 190 builtin_define_std ("hp800"); \ 191 builtin_define_std ("hp9000"); \ 192 builtin_define_std ("hp9k8"); \ 193 if (!c_dialect_cxx () && !flag_iso) \ 194 builtin_define ("hppa"); \ 195 builtin_define_std ("spectrum"); \ 196 builtin_define_std ("unix"); \ 197 builtin_assert ("system=bsd"); \ 198 builtin_assert ("system=unix"); \ 199 } \ 200 while (0) 201 202 #define CC1_SPEC "%{pg:} %{p:}" 203 204 #define LINK_SPEC "%{mlinker-opt:-O} %{!shared:-u main} %{shared:-b}" 205 206 /* We don't want -lg. */ 207 #ifndef LIB_SPEC 208 #define LIB_SPEC "%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}" 209 #endif 210 211 /* Make gcc agree with <machine/ansi.h> */ 212 213 #define SIZE_TYPE "unsigned int" 214 #define PTRDIFF_TYPE "int" 215 #define WCHAR_TYPE "unsigned int" 216 #define WCHAR_TYPE_SIZE 32 217 218 /* target machine storage layout */ 219 typedef struct GTY(()) machine_function 220 { 221 /* Flag indicating that a .NSUBSPA directive has been output for 222 this function. */ 223 int in_nsubspa; 224 } machine_function; 225 226 /* Define this macro if it is advisable to hold scalars in registers 227 in a wider mode than that declared by the program. In such cases, 228 the value is constrained to be within the bounds of the declared 229 type, but kept valid in the wider mode. The signedness of the 230 extension may differ from that of the type. */ 231 232 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ 233 if (GET_MODE_CLASS (MODE) == MODE_INT \ 234 && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \ 235 (MODE) = word_mode; 236 237 /* Define this if most significant bit is lowest numbered 238 in instructions that operate on numbered bit-fields. */ 239 #define BITS_BIG_ENDIAN 1 240 241 /* Define this if most significant byte of a word is the lowest numbered. */ 242 /* That is true on the HP-PA. */ 243 #define BYTES_BIG_ENDIAN 1 244 245 /* Define this if most significant word of a multiword number is lowest 246 numbered. */ 247 #define WORDS_BIG_ENDIAN 1 248 249 #define MAX_BITS_PER_WORD 64 250 251 /* Width of a word, in units (bytes). */ 252 #define UNITS_PER_WORD (TARGET_64BIT ? 8 : 4) 253 254 /* Minimum number of units in a word. If this is undefined, the default 255 is UNITS_PER_WORD. Otherwise, it is the constant value that is the 256 smallest value that UNITS_PER_WORD can have at run-time. 257 258 FIXME: This needs to be 4 when TARGET_64BIT is true to suppress the 259 building of various TImode routines in libgcc. The HP runtime 260 specification doesn't provide the alignment requirements and calling 261 conventions for TImode variables. */ 262 #define MIN_UNITS_PER_WORD 4 263 264 /* The widest floating point format supported by the hardware. Note that 265 setting this influences some Ada floating point type sizes, currently 266 required for GNAT to operate properly. */ 267 #define WIDEST_HARDWARE_FP_SIZE 64 268 269 /* Allocation boundary (in *bits*) for storing arguments in argument list. */ 270 #define PARM_BOUNDARY BITS_PER_WORD 271 272 /* Largest alignment required for any stack parameter, in bits. 273 Don't define this if it is equal to PARM_BOUNDARY */ 274 #define MAX_PARM_BOUNDARY BIGGEST_ALIGNMENT 275 276 /* Boundary (in *bits*) on which stack pointer is always aligned; 277 certain optimizations in combine depend on this. 278 279 The HP-UX runtime documents mandate 64-byte and 16-byte alignment for 280 the stack on the 32 and 64-bit ports, respectively. However, we 281 are only guaranteed that the stack is aligned to BIGGEST_ALIGNMENT 282 in main. Thus, we treat the former as the preferred alignment. */ 283 #define STACK_BOUNDARY BIGGEST_ALIGNMENT 284 #define PREFERRED_STACK_BOUNDARY (TARGET_64BIT ? 128 : 512) 285 286 /* Allocation boundary (in *bits*) for the code of a function. */ 287 #define FUNCTION_BOUNDARY BITS_PER_WORD 288 289 /* Alignment of field after `int : 0' in a structure. */ 290 #define EMPTY_FIELD_BOUNDARY 32 291 292 /* Every structure's size must be a multiple of this. */ 293 #define STRUCTURE_SIZE_BOUNDARY 8 294 295 /* A bit-field declared as `int' forces `int' alignment for the struct. */ 296 #define PCC_BITFIELD_TYPE_MATTERS 1 297 298 /* No data type wants to be aligned rounder than this. The long double 299 type has 16-byte alignment on the 64-bit target even though it was never 300 implemented in hardware. The software implementation only needs 8-byte 301 alignment. This matches the biggest alignment of the HP compilers. */ 302 #define BIGGEST_ALIGNMENT (2 * BITS_PER_WORD) 303 304 /* Alignment, in bits, a C conformant malloc implementation has to provide. 305 The HP-UX malloc implementation provides a default alignment of 8 bytes. 306 It should be 16 bytes on the 64-bit target since long double has 16-byte 307 alignment. It can be increased with mallopt but it's non critical since 308 long double was never implemented in hardware. The glibc implementation 309 currently provides 8-byte alignment. It should be 16 bytes since various 310 POSIX types such as pthread_mutex_t require 16-byte alignment. Again, 311 this is non critical since 16-byte alignment is no longer needed for 312 atomic operations. */ 313 #define MALLOC_ABI_ALIGNMENT (TARGET_64BIT ? 128 : 64) 314 315 /* Make arrays of chars word-aligned for the same reasons. */ 316 #define DATA_ALIGNMENT(TYPE, ALIGN) \ 317 (TREE_CODE (TYPE) == ARRAY_TYPE \ 318 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \ 319 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN)) 320 321 /* Set this nonzero if move instructions will actually fail to work 322 when given unaligned data. */ 323 #define STRICT_ALIGNMENT 1 324 325 /* Specify the registers used for certain standard purposes. 326 The values of these macros are register numbers. */ 327 328 /* The HP-PA pc isn't overloaded on a register that the compiler knows about. */ 329 /* #define PC_REGNUM */ 330 331 /* Register to use for pushing function arguments. */ 332 #define STACK_POINTER_REGNUM 30 333 334 /* Fixed register for local variable access. Always eliminated. */ 335 #define FRAME_POINTER_REGNUM (TARGET_64BIT ? 61 : 89) 336 337 /* Base register for access to local variables of the function. */ 338 #define HARD_FRAME_POINTER_REGNUM 3 339 340 /* Don't allow hard registers to be renamed into r2 unless r2 341 is already live or already being saved (due to eh). */ 342 343 #define HARD_REGNO_RENAME_OK(OLD_REG, NEW_REG) \ 344 ((NEW_REG) != 2 || df_regs_ever_live_p (2) || crtl->calls_eh_return) 345 346 /* Base register for access to arguments of the function. */ 347 #define ARG_POINTER_REGNUM (TARGET_64BIT ? 29 : 3) 348 349 /* Register in which static-chain is passed to a function. */ 350 #define STATIC_CHAIN_REGNUM (TARGET_64BIT ? 31 : 29) 351 352 /* Register used to address the offset table for position-independent 353 data references. */ 354 #define PIC_OFFSET_TABLE_REGNUM \ 355 (flag_pic ? (TARGET_64BIT ? 27 : 19) : INVALID_REGNUM) 356 357 #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED 1 358 359 /* Function to return the rtx used to save the pic offset table register 360 across function calls. */ 361 extern rtx hppa_pic_save_rtx (void); 362 363 #define DEFAULT_PCC_STRUCT_RETURN 0 364 365 /* Register in which address to store a structure value 366 is passed to a function. */ 367 #define PA_STRUCT_VALUE_REGNUM 28 368 369 /* Definitions for register eliminations. 370 371 We have two registers that can be eliminated. First, the frame pointer 372 register can often be eliminated in favor of the stack pointer register. 373 Secondly, the argument pointer register can always be eliminated in the 374 32-bit runtimes. */ 375 376 /* This is an array of structures. Each structure initializes one pair 377 of eliminable registers. The "from" register number is given first, 378 followed by "to". Eliminations of the same "from" register are listed 379 in order of preference. 380 381 The argument pointer cannot be eliminated in the 64-bit runtime. It 382 is the same register as the hard frame pointer in the 32-bit runtime. 383 So, it does not need to be listed. */ 384 #define ELIMINABLE_REGS \ 385 {{ HARD_FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ 386 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ 387 { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM} } 388 389 /* Define the offset between two registers, one to be eliminated, 390 and the other its replacement, at the start of a routine. */ 391 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ 392 ((OFFSET) = pa_initial_elimination_offset(FROM, TO)) 393 394 /* Describe how we implement __builtin_eh_return. */ 395 #define EH_RETURN_DATA_REGNO(N) \ 396 ((N) < 3 ? (N) + 20 : (N) == 3 ? 31 : INVALID_REGNUM) 397 #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, 29) 398 #define EH_RETURN_HANDLER_RTX pa_eh_return_handler_rtx () 399 400 /* Offset from the frame pointer register value to the top of stack. */ 401 #define FRAME_POINTER_CFA_OFFSET(FNDECL) 0 402 403 /* The maximum number of hard registers that can be saved in the call 404 frame. The soft frame pointer is not included. */ 405 #define DWARF_FRAME_REGISTERS (FIRST_PSEUDO_REGISTER - 1) 406 407 /* A C expression whose value is RTL representing the location of the 408 incoming return address at the beginning of any function, before the 409 prologue. You only need to define this macro if you want to support 410 call frame debugging information like that provided by DWARF 2. */ 411 #define INCOMING_RETURN_ADDR_RTX (gen_rtx_REG (word_mode, 2)) 412 #define DWARF_FRAME_RETURN_COLUMN (DWARF_FRAME_REGNUM (2)) 413 414 /* A C expression whose value is an integer giving a DWARF 2 column 415 number that may be used as an alternate return column. This should 416 be defined only if DWARF_FRAME_RETURN_COLUMN is set to a general 417 register, but an alternate column needs to be used for signal frames. 418 419 Column 0 is not used but unfortunately its register size is set to 420 4 bytes (sizeof CCmode) so it can't be used on 64-bit targets. */ 421 #define DWARF_ALT_FRAME_RETURN_COLUMN (FIRST_PSEUDO_REGISTER - 1) 422 423 /* This macro chooses the encoding of pointers embedded in the exception 424 handling sections. If at all possible, this should be defined such 425 that the exception handling section will not require dynamic relocations, 426 and so may be read-only. 427 428 Because the HP assembler auto aligns, it is necessary to use 429 DW_EH_PE_aligned. It's not possible to make the data read-only 430 on the HP-UX SOM port since the linker requires fixups for label 431 differences in different sections to be word aligned. However, 432 the SOM linker can do unaligned fixups for absolute pointers. 433 We also need aligned pointers for global and function pointers. 434 435 Although the HP-UX 64-bit ELF linker can handle unaligned pc-relative 436 fixups, the runtime doesn't have a consistent relationship between 437 text and data for dynamically loaded objects. Thus, it's not possible 438 to use pc-relative encoding for pointers on this target. It may be 439 possible to use segment relative encodings but GAS doesn't currently 440 have a mechanism to generate these encodings. For other targets, we 441 use pc-relative encoding for pointers. If the pointer might require 442 dynamic relocation, we make it indirect. */ 443 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \ 444 (TARGET_GAS && !TARGET_HPUX \ 445 ? (DW_EH_PE_pcrel \ 446 | ((GLOBAL) || (CODE) == 2 ? DW_EH_PE_indirect : 0) \ 447 | (TARGET_64BIT ? DW_EH_PE_sdata8 : DW_EH_PE_sdata4)) \ 448 : (!TARGET_GAS || (GLOBAL) || (CODE) == 2 \ 449 ? DW_EH_PE_aligned : DW_EH_PE_absptr)) 450 451 /* Handle special EH pointer encodings. Absolute, pc-relative, and 452 indirect are handled automatically. We output pc-relative, and 453 indirect pc-relative ourself since we need some special magic to 454 generate pc-relative relocations, and to handle indirect function 455 pointers. */ 456 #define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \ 457 do { \ 458 if (((ENCODING) & 0x70) == DW_EH_PE_pcrel) \ 459 { \ 460 fputs (integer_asm_op (SIZE, FALSE), FILE); \ 461 if ((ENCODING) & DW_EH_PE_indirect) \ 462 output_addr_const (FILE, pa_get_deferred_plabel (ADDR)); \ 463 else \ 464 assemble_name (FILE, XSTR ((ADDR), 0)); \ 465 fputs ("+8-$PIC_pcrel$0", FILE); \ 466 goto DONE; \ 467 } \ 468 } while (0) 469 470 471 /* The class value for index registers, and the one for base regs. */ 472 #define INDEX_REG_CLASS GENERAL_REGS 473 #define BASE_REG_CLASS GENERAL_REGS 474 475 #define FP_REG_CLASS_P(CLASS) \ 476 ((CLASS) == FP_REGS || (CLASS) == FPUPPER_REGS) 477 478 /* True if register is floating-point. */ 479 #define FP_REGNO_P(N) ((N) >= FP_REG_FIRST && (N) <= FP_REG_LAST) 480 481 #define MAYBE_FP_REG_CLASS_P(CLASS) \ 482 reg_classes_intersect_p ((CLASS), FP_REGS) 483 484 485 /* Stack layout; function entry, exit and calling. */ 486 487 /* Define this if pushing a word on the stack 488 makes the stack pointer a smaller address. */ 489 /* #define STACK_GROWS_DOWNWARD */ 490 491 /* Believe it or not. */ 492 #define ARGS_GROW_DOWNWARD 1 493 494 /* Define this to nonzero if the nominal address of the stack frame 495 is at the high-address end of the local variables; 496 that is, each additional local variable allocated 497 goes at a more negative offset in the frame. */ 498 #define FRAME_GROWS_DOWNWARD 0 499 500 /* Define STACK_ALIGNMENT_NEEDED to zero to disable final alignment 501 of the stack. The default is to align it to STACK_BOUNDARY. */ 502 #define STACK_ALIGNMENT_NEEDED 0 503 504 /* If we generate an insn to push BYTES bytes, 505 this says how many the stack pointer really advances by. 506 On the HP-PA, don't define this because there are no push insns. */ 507 /* #define PUSH_ROUNDING(BYTES) */ 508 509 /* Offset of first parameter from the argument pointer register value. 510 This value will be negated because the arguments grow down. 511 Also note that on STACK_GROWS_UPWARD machines (such as this one) 512 this is the distance from the frame pointer to the end of the first 513 argument, not it's beginning. To get the real offset of the first 514 argument, the size of the argument must be added. */ 515 516 #define FIRST_PARM_OFFSET(FNDECL) (TARGET_64BIT ? -64 : -32) 517 518 /* When a parameter is passed in a register, stack space is still 519 allocated for it. */ 520 #define REG_PARM_STACK_SPACE(DECL) (TARGET_64BIT ? 64 : 16) 521 522 /* Define this if the above stack space is to be considered part of the 523 space allocated by the caller. */ 524 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 1 525 526 /* Keep the stack pointer constant throughout the function. 527 This is both an optimization and a necessity: longjmp 528 doesn't behave itself when the stack pointer moves within 529 the function! */ 530 #define ACCUMULATE_OUTGOING_ARGS 1 531 532 /* The weird HPPA calling conventions require a minimum of 48 bytes on 533 the stack: 16 bytes for register saves, and 32 bytes for magic. 534 This is the difference between the logical top of stack and the 535 actual sp. 536 537 On the 64-bit port, the HP C compiler allocates a 48-byte frame 538 marker, although the runtime documentation only describes a 16 539 byte marker. For compatibility, we allocate 48 bytes. */ 540 #define STACK_POINTER_OFFSET \ 541 (TARGET_64BIT ? -(crtl->outgoing_args_size + 48) : poly_int64 (-32)) 542 543 #define STACK_DYNAMIC_OFFSET(FNDECL) \ 544 (TARGET_64BIT \ 545 ? (STACK_POINTER_OFFSET) \ 546 : ((STACK_POINTER_OFFSET) - crtl->outgoing_args_size)) 547 548 549 /* Define a data type for recording info about an argument list 550 during the scan of that argument list. This data type should 551 hold all necessary information about the function itself 552 and about the args processed so far, enough to enable macros 553 such as FUNCTION_ARG to determine where the next arg should go. 554 555 On the HP-PA, the WORDS field holds the number of words 556 of arguments scanned so far (including the invisible argument, 557 if any, which holds the structure-value-address). Thus, 4 or 558 more means all following args should go on the stack. 559 560 The INCOMING field tracks whether this is an "incoming" or 561 "outgoing" argument. 562 563 The INDIRECT field indicates whether this is an indirect 564 call or not. 565 566 The NARGS_PROTOTYPE field indicates that an argument does not 567 have a prototype when it less than or equal to 0. */ 568 569 struct hppa_args {int words, nargs_prototype, incoming, indirect; }; 570 571 #define CUMULATIVE_ARGS struct hppa_args 572 573 /* Initialize a variable CUM of type CUMULATIVE_ARGS 574 for a call to a function whose data type is FNTYPE. 575 For a library call, FNTYPE is 0. */ 576 577 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \ 578 (CUM).words = 0, \ 579 (CUM).incoming = 0, \ 580 (CUM).indirect = (FNTYPE) && !(FNDECL), \ 581 (CUM).nargs_prototype = (FNTYPE && prototype_p (FNTYPE) \ 582 ? (list_length (TYPE_ARG_TYPES (FNTYPE)) - 1 \ 583 + (TYPE_MODE (TREE_TYPE (FNTYPE)) == BLKmode \ 584 || pa_return_in_memory (TREE_TYPE (FNTYPE), 0))) \ 585 : 0) 586 587 588 589 /* Similar, but when scanning the definition of a procedure. We always 590 set NARGS_PROTOTYPE large so we never return a PARALLEL. */ 591 592 #define INIT_CUMULATIVE_INCOMING_ARGS(CUM,FNTYPE,IGNORE) \ 593 (CUM).words = 0, \ 594 (CUM).incoming = 1, \ 595 (CUM).indirect = 0, \ 596 (CUM).nargs_prototype = 1000 597 598 /* Determine where to put an argument to a function. 599 Value is zero to push the argument on the stack, 600 or a hard register in which to store the argument. 601 602 MODE is the argument's machine mode. 603 TYPE is the data type of the argument (as a tree). 604 This is null for libcalls where that information may 605 not be available. 606 CUM is a variable of type CUMULATIVE_ARGS which gives info about 607 the preceding args and about the function being called. 608 NAMED is nonzero if this argument is a named parameter 609 (otherwise it is an extra parameter matching an ellipsis). 610 611 On the HP-PA the first four words of args are normally in registers 612 and the rest are pushed. But any arg that won't entirely fit in regs 613 is pushed. 614 615 Arguments passed in registers are either 1 or 2 words long. 616 617 The caller must make a distinction between calls to explicitly named 618 functions and calls through pointers to functions -- the conventions 619 are different! Calls through pointers to functions only use general 620 registers for the first four argument words. 621 622 Of course all this is different for the portable runtime model 623 HP wants everyone to use for ELF. Ugh. Here's a quick description 624 of how it's supposed to work. 625 626 1) callee side remains unchanged. It expects integer args to be 627 in the integer registers, float args in the float registers and 628 unnamed args in integer registers. 629 630 2) caller side now depends on if the function being called has 631 a prototype in scope (rather than if it's being called indirectly). 632 633 2a) If there is a prototype in scope, then arguments are passed 634 according to their type (ints in integer registers, floats in float 635 registers, unnamed args in integer registers. 636 637 2b) If there is no prototype in scope, then floating point arguments 638 are passed in both integer and float registers. egad. 639 640 FYI: The portable parameter passing conventions are almost exactly like 641 the standard parameter passing conventions on the RS6000. That's why 642 you'll see lots of similar code in rs6000.h. */ 643 644 /* Specify padding for the last element of a block move between registers 645 and memory. 646 647 The 64-bit runtime specifies that objects need to be left justified 648 (i.e., the normal justification for a big endian target). The 32-bit 649 runtime specifies right justification for objects smaller than 64 bits. 650 We use a DImode register in the parallel for 5 to 7 byte structures 651 so that there is only one element. This allows the object to be 652 correctly padded. */ 653 #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \ 654 targetm.calls.function_arg_padding ((MODE), (TYPE)) 655 656 657 /* On HPPA, we emit profiling code as rtl via PROFILE_HOOK rather than 658 as assembly via FUNCTION_PROFILER. Just output a local label. 659 We can't use the function label because the GAS SOM target can't 660 handle the difference of a global symbol and a local symbol. */ 661 662 #ifndef FUNC_BEGIN_PROLOG_LABEL 663 #define FUNC_BEGIN_PROLOG_LABEL "LFBP" 664 #endif 665 666 #define FUNCTION_PROFILER(FILE, LABEL) \ 667 (*targetm.asm_out.internal_label) (FILE, FUNC_BEGIN_PROLOG_LABEL, LABEL) 668 669 #define PROFILE_HOOK(label_no) hppa_profile_hook (label_no) 670 671 /* The profile counter if emitted must come before the prologue. */ 672 #define PROFILE_BEFORE_PROLOGUE 1 673 674 /* We never want final.c to emit profile counters. When profile 675 counters are required, we have to defer emitting them to the end 676 of the current file. */ 677 #define NO_PROFILE_COUNTERS 1 678 679 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, 680 the stack pointer does not matter. The value is tested only in 681 functions that have frame pointers. 682 No definition is equivalent to always zero. */ 683 684 extern int may_call_alloca; 685 686 #define EXIT_IGNORE_STACK \ 687 (maybe_ne (get_frame_size (), 0) \ 688 || cfun->calls_alloca || maybe_ne (crtl->outgoing_args_size, 0)) 689 690 /* Length in units of the trampoline for entering a nested function. */ 691 692 #define TRAMPOLINE_SIZE (TARGET_64BIT ? 72 : 64) 693 694 /* Alignment required by the trampoline. */ 695 696 #define TRAMPOLINE_ALIGNMENT BITS_PER_WORD 697 698 /* Minimum length of a cache line. A length of 16 will work on all 699 PA-RISC processors. All PA 1.1 processors have a cache line of 700 32 bytes. Most but not all PA 2.0 processors have a cache line 701 of 64 bytes. As cache flushes are expensive and we don't support 702 PA 1.0, we use a minimum length of 32. */ 703 704 #define MIN_CACHELINE_SIZE 32 705 706 707 /* Addressing modes, and classification of registers for them. 708 709 Using autoincrement addressing modes on PA8000 class machines is 710 not profitable. */ 711 712 #define HAVE_POST_INCREMENT (pa_cpu < PROCESSOR_8000) 713 #define HAVE_POST_DECREMENT (pa_cpu < PROCESSOR_8000) 714 715 #define HAVE_PRE_DECREMENT (pa_cpu < PROCESSOR_8000) 716 #define HAVE_PRE_INCREMENT (pa_cpu < PROCESSOR_8000) 717 718 /* Macros to check register numbers against specific register classes. */ 719 720 /* The following macros assume that X is a hard or pseudo reg number. 721 They give nonzero only if X is a hard reg of the suitable class 722 or a pseudo reg currently allocated to a suitable hard reg. 723 Since they use reg_renumber, they are safe only once reg_renumber 724 has been allocated, which happens in reginfo.c during register 725 allocation. */ 726 727 #define REGNO_OK_FOR_INDEX_P(X) \ 728 ((X) && ((X) < 32 \ 729 || ((X) == FRAME_POINTER_REGNUM) \ 730 || ((X) >= FIRST_PSEUDO_REGISTER \ 731 && reg_renumber \ 732 && (unsigned) reg_renumber[X] < 32))) 733 #define REGNO_OK_FOR_BASE_P(X) \ 734 ((X) && ((X) < 32 \ 735 || ((X) == FRAME_POINTER_REGNUM) \ 736 || ((X) >= FIRST_PSEUDO_REGISTER \ 737 && reg_renumber \ 738 && (unsigned) reg_renumber[X] < 32))) 739 #define REGNO_OK_FOR_FP_P(X) \ 740 (FP_REGNO_P (X) \ 741 || (X >= FIRST_PSEUDO_REGISTER \ 742 && reg_renumber \ 743 && FP_REGNO_P (reg_renumber[X]))) 744 745 /* Now macros that check whether X is a register and also, 746 strictly, whether it is in a specified class. 747 748 These macros are specific to the HP-PA, and may be used only 749 in code for printing assembler insns and in conditions for 750 define_optimization. */ 751 752 /* 1 if X is an fp register. */ 753 754 #define FP_REG_P(X) (REG_P (X) && REGNO_OK_FOR_FP_P (REGNO (X))) 755 756 /* Maximum number of registers that can appear in a valid memory address. */ 757 758 #define MAX_REGS_PER_ADDRESS 2 759 760 /* TLS symbolic reference. */ 761 #define PA_SYMBOL_REF_TLS_P(X) \ 762 (GET_CODE (X) == SYMBOL_REF && SYMBOL_REF_TLS_MODEL (X) != 0) 763 764 /* Recognize any constant value that is a valid address except 765 for symbolic addresses. We get better CSE by rejecting them 766 here and allowing hppa_legitimize_address to break them up. We 767 use most of the constants accepted by CONSTANT_P, except CONST_DOUBLE. */ 768 769 #define CONSTANT_ADDRESS_P(X) \ 770 ((GET_CODE (X) == LABEL_REF \ 771 || (GET_CODE (X) == SYMBOL_REF && !SYMBOL_REF_TLS_MODEL (X)) \ 772 || GET_CODE (X) == CONST_INT \ 773 || (GET_CODE (X) == CONST && !tls_referenced_p (X)) \ 774 || GET_CODE (X) == HIGH) \ 775 && (reload_in_progress || reload_completed \ 776 || ! pa_symbolic_expression_p (X))) 777 778 /* A C expression that is nonzero if we are using the new HP assembler. */ 779 780 #ifndef NEW_HP_ASSEMBLER 781 #define NEW_HP_ASSEMBLER 0 782 #endif 783 784 /* The macros below define the immediate range for CONST_INTS on 785 the 64-bit port. Constants in this range can be loaded in three 786 instructions using a ldil/ldo/depdi sequence. Constants outside 787 this range are forced to the constant pool prior to reload. */ 788 789 #define MAX_LEGIT_64BIT_CONST_INT ((HOST_WIDE_INT) 32 << 31) 790 #define MIN_LEGIT_64BIT_CONST_INT \ 791 ((HOST_WIDE_INT)((unsigned HOST_WIDE_INT) -32 << 31)) 792 #define LEGITIMATE_64BIT_CONST_INT_P(X) \ 793 ((X) >= MIN_LEGIT_64BIT_CONST_INT && (X) < MAX_LEGIT_64BIT_CONST_INT) 794 795 /* Target flags set on a symbol_ref. */ 796 797 /* Set by ASM_OUTPUT_SYMBOL_REF when a symbol_ref is output. */ 798 #define SYMBOL_FLAG_REFERENCED (1 << SYMBOL_FLAG_MACH_DEP_SHIFT) 799 #define SYMBOL_REF_REFERENCED_P(RTX) \ 800 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_REFERENCED) != 0) 801 802 /* Defines for constraints.md. */ 803 804 /* Return 1 iff OP is a scaled or unscaled index address. */ 805 #define IS_INDEX_ADDR_P(OP) \ 806 (GET_CODE (OP) == PLUS \ 807 && GET_MODE (OP) == Pmode \ 808 && (GET_CODE (XEXP (OP, 0)) == MULT \ 809 || GET_CODE (XEXP (OP, 1)) == MULT \ 810 || (REG_P (XEXP (OP, 0)) \ 811 && REG_P (XEXP (OP, 1))))) 812 813 /* Return 1 iff OP is a LO_SUM DLT address. */ 814 #define IS_LO_SUM_DLT_ADDR_P(OP) \ 815 (GET_CODE (OP) == LO_SUM \ 816 && GET_MODE (OP) == Pmode \ 817 && REG_P (XEXP (OP, 0)) \ 818 && REG_OK_FOR_BASE_P (XEXP (OP, 0)) \ 819 && GET_CODE (XEXP (OP, 1)) == UNSPEC) 820 821 /* Nonzero if 14-bit offsets can be used for all loads and stores. 822 This is not possible when generating PA 1.x code as floating point 823 loads and stores only support 5-bit offsets. Note that we do not 824 forbid the use of 14-bit offsets for integer modes. Instead, we 825 use secondary reloads to fix REG+D memory addresses for integer 826 mode floating-point loads and stores. 827 828 FIXME: the ELF32 linker clobbers the LSB of the FP register number 829 in PA 2.0 floating-point insns with long displacements. This is 830 because R_PARISC_DPREL14WR and other relocations like it are not 831 yet supported by GNU ld. For now, we reject long displacements 832 on this target. */ 833 834 #define INT14_OK_STRICT \ 835 (TARGET_SOFT_FLOAT \ 836 || TARGET_DISABLE_FPREGS \ 837 || (TARGET_PA_20 && !TARGET_ELF32)) 838 839 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx 840 and check its validity for a certain class. 841 We have two alternate definitions for each of them. 842 The usual definition accepts all pseudo regs; the other rejects 843 them unless they have been allocated suitable hard regs. 844 845 Most source files want to accept pseudo regs in the hope that 846 they will get allocated to the class that the insn wants them to be in. 847 Source files for reload pass need to be strict. 848 After reload, it makes no difference, since pseudo regs have 849 been eliminated by then. */ 850 851 /* Nonzero if X is a hard reg that can be used as an index 852 or if it is a pseudo reg. */ 853 #define REG_OK_FOR_INDEX_P(X) \ 854 (REGNO (X) && (REGNO (X) < 32 \ 855 || REGNO (X) == FRAME_POINTER_REGNUM \ 856 || REGNO (X) >= FIRST_PSEUDO_REGISTER)) 857 858 /* Nonzero if X is a hard reg that can be used as a base reg 859 or if it is a pseudo reg. */ 860 #define REG_OK_FOR_BASE_P(X) \ 861 (REGNO (X) && (REGNO (X) < 32 \ 862 || REGNO (X) == FRAME_POINTER_REGNUM \ 863 || REGNO (X) >= FIRST_PSEUDO_REGISTER)) 864 865 /* Nonzero if X is a hard reg that can be used as an index. */ 866 #define STRICT_REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X)) 867 868 /* Nonzero if X is a hard reg that can be used as a base reg. */ 869 #define STRICT_REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) 870 871 #define VAL_5_BITS_P(X) ((unsigned HOST_WIDE_INT)(X) + 0x10 < 0x20) 872 #define INT_5_BITS(X) VAL_5_BITS_P (INTVAL (X)) 873 874 #define VAL_U5_BITS_P(X) ((unsigned HOST_WIDE_INT)(X) < 0x20) 875 #define INT_U5_BITS(X) VAL_U5_BITS_P (INTVAL (X)) 876 877 #define VAL_U6_BITS_P(X) ((unsigned HOST_WIDE_INT)(X) < 0x40) 878 #define INT_U6_BITS(X) VAL_U6_BITS_P (INTVAL (X)) 879 880 #define VAL_11_BITS_P(X) ((unsigned HOST_WIDE_INT)(X) + 0x400 < 0x800) 881 #define INT_11_BITS(X) VAL_11_BITS_P (INTVAL (X)) 882 883 #define VAL_14_BITS_P(X) ((unsigned HOST_WIDE_INT)(X) + 0x2000 < 0x4000) 884 #define INT_14_BITS(X) VAL_14_BITS_P (INTVAL (X)) 885 886 #if HOST_BITS_PER_WIDE_INT > 32 887 #define VAL_32_BITS_P(X) \ 888 ((unsigned HOST_WIDE_INT)(X) + ((unsigned HOST_WIDE_INT) 1 << 31) \ 889 < (unsigned HOST_WIDE_INT) 2 << 31) 890 #else 891 #define VAL_32_BITS_P(X) 1 892 #endif 893 #define INT_32_BITS(X) VAL_32_BITS_P (INTVAL (X)) 894 895 /* These are the modes that we allow for scaled indexing. */ 896 #define MODE_OK_FOR_SCALED_INDEXING_P(MODE) \ 897 ((TARGET_64BIT && (MODE) == DImode) \ 898 || (MODE) == SImode \ 899 || (MODE) == HImode \ 900 || (MODE) == SFmode \ 901 || (MODE) == DFmode) 902 903 /* These are the modes that we allow for unscaled indexing. */ 904 #define MODE_OK_FOR_UNSCALED_INDEXING_P(MODE) \ 905 ((TARGET_64BIT && (MODE) == DImode) \ 906 || (MODE) == SImode \ 907 || (MODE) == HImode \ 908 || (MODE) == QImode \ 909 || (MODE) == SFmode \ 910 || (MODE) == DFmode) 911 912 /* Try a machine-dependent way of reloading an illegitimate address 913 operand. If we find one, push the reload and jump to WIN. This 914 macro is used in only one place: `find_reloads_address' in reload.c. */ 915 916 #define LEGITIMIZE_RELOAD_ADDRESS(AD, MODE, OPNUM, TYPE, IND_L, WIN) \ 917 do { \ 918 rtx new_ad = pa_legitimize_reload_address (AD, MODE, OPNUM, TYPE, IND_L); \ 919 if (new_ad) \ 920 { \ 921 AD = new_ad; \ 922 goto WIN; \ 923 } \ 924 } while (0) 925 926 927 #define TARGET_ASM_SELECT_SECTION pa_select_section 928 929 /* Return a nonzero value if DECL has a section attribute. */ 930 #define IN_NAMED_SECTION_P(DECL) \ 931 ((TREE_CODE (DECL) == FUNCTION_DECL || TREE_CODE (DECL) == VAR_DECL) \ 932 && DECL_SECTION_NAME (DECL) != NULL) 933 934 /* Define this macro if references to a symbol must be treated 935 differently depending on something about the variable or 936 function named by the symbol (such as what section it is in). 937 938 The macro definition, if any, is executed immediately after the 939 rtl for DECL or other node is created. 940 The value of the rtl will be a `mem' whose address is a 941 `symbol_ref'. 942 943 The usual thing for this macro to do is to a flag in the 944 `symbol_ref' (such as `SYMBOL_REF_FLAG') or to store a modified 945 name string in the `symbol_ref' (if one bit is not enough 946 information). 947 948 On the HP-PA we use this to indicate if a symbol is in text or 949 data space. Also, function labels need special treatment. */ 950 951 #define TEXT_SPACE_P(DECL)\ 952 (TREE_CODE (DECL) == FUNCTION_DECL \ 953 || (TREE_CODE (DECL) == VAR_DECL \ 954 && TREE_READONLY (DECL) && ! TREE_SIDE_EFFECTS (DECL) \ 955 && (! DECL_INITIAL (DECL) || ! pa_reloc_needed (DECL_INITIAL (DECL))) \ 956 && !flag_pic) \ 957 || CONSTANT_CLASS_P (DECL)) 958 959 #define FUNCTION_NAME_P(NAME) (*(NAME) == '@') 960 961 /* Specify the machine mode that this machine uses for the index in the 962 tablejump instruction. We use a 32-bit absolute address for non-pic code, 963 and a 32-bit offset for 32 and 64-bit pic code. */ 964 #define CASE_VECTOR_MODE SImode 965 966 /* Jump tables must be 32-bit aligned, no matter the size of the element. */ 967 #define ADDR_VEC_ALIGN(ADDR_VEC) 2 968 969 /* Define this as 1 if `char' should by default be signed; else as 0. */ 970 #define DEFAULT_SIGNED_CHAR 1 971 972 /* Max number of bytes we can move from memory to memory 973 in one reasonably fast instruction. */ 974 #define MOVE_MAX 8 975 976 /* Higher than the default as we prefer to use simple move insns 977 (better scheduling and delay slot filling) and because our 978 built-in block move is really a 2X unrolled loop. 979 980 Believe it or not, this has to be big enough to allow for copying all 981 arguments passed in registers to avoid infinite recursion during argument 982 setup for a function call. Why? Consider how we copy the stack slots 983 reserved for parameters when they may be trashed by a call. */ 984 #define MOVE_RATIO(speed) (TARGET_64BIT ? 8 : 4) 985 986 /* Define if operations between registers always perform the operation 987 on the full register even if a narrower mode is specified. */ 988 #define WORD_REGISTER_OPERATIONS 1 989 990 /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD 991 will either zero-extend or sign-extend. The value of this macro should 992 be the code that says which one of the two operations is implicitly 993 done, UNKNOWN if none. */ 994 #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND 995 996 /* Nonzero if access to memory by bytes is slow and undesirable. */ 997 #define SLOW_BYTE_ACCESS 1 998 999 /* Specify the machine mode that pointers have. 1000 After generation of rtl, the compiler makes no further distinction 1001 between pointers and any other objects of this machine mode. */ 1002 #define Pmode word_mode 1003 1004 /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE, 1005 return the mode to be used for the comparison. For floating-point, CCFPmode 1006 should be used. CC_NOOVmode should be used when the first operand is a 1007 PLUS, MINUS, or NEG. CCmode should be used when no special processing is 1008 needed. */ 1009 #define SELECT_CC_MODE(OP,X,Y) \ 1010 (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT ? CCFPmode : CCmode) \ 1011 1012 /* A function address in a call instruction 1013 is a byte address (for indexing purposes) 1014 so give the MEM rtx a byte's mode. */ 1015 #define FUNCTION_MODE SImode 1016 1017 /* Define this if addresses of constant functions 1018 shouldn't be put through pseudo regs where they can be cse'd. 1019 Desirable on machines where ordinary constants are expensive 1020 but a CALL with constant address is cheap. */ 1021 #define NO_FUNCTION_CSE 1 1022 1023 /* Define this to be nonzero if shift instructions ignore all but the low-order 1024 few bits. */ 1025 #define SHIFT_COUNT_TRUNCATED 1 1026 1027 /* Adjust the cost of branches. */ 1028 #define BRANCH_COST(speed_p, predictable_p) (pa_cpu == PROCESSOR_8000 ? 2 : 1) 1029 1030 /* Handling the special cases is going to get too complicated for a macro, 1031 just call `pa_adjust_insn_length' to do the real work. */ 1032 #define ADJUST_INSN_LENGTH(INSN, LENGTH) \ 1033 ((LENGTH) = pa_adjust_insn_length ((INSN), (LENGTH))) 1034 1035 /* Millicode insns are actually function calls with some special 1036 constraints on arguments and register usage. 1037 1038 Millicode calls always expect their arguments in the integer argument 1039 registers, and always return their result in %r29 (ret1). They 1040 are expected to clobber their arguments, %r1, %r29, and the return 1041 pointer which is %r31 on 32-bit and %r2 on 64-bit, and nothing else. 1042 1043 This macro tells reorg that the references to arguments and 1044 millicode calls do not appear to happen until after the millicode call. 1045 This allows reorg to put insns which set the argument registers into the 1046 delay slot of the millicode call -- thus they act more like traditional 1047 CALL_INSNs. 1048 1049 Note we cannot consider side effects of the insn to be delayed because 1050 the branch and link insn will clobber the return pointer. If we happened 1051 to use the return pointer in the delay slot of the call, then we lose. 1052 1053 get_attr_type will try to recognize the given insn, so make sure to 1054 filter out things it will not accept -- SEQUENCE, USE and CLOBBER insns 1055 in particular. */ 1056 #define INSN_REFERENCES_ARE_DELAYED(X) (pa_insn_refs_are_delayed (X)) 1057 1058 1059 /* Control the assembler format that we output. */ 1060 1061 /* A C string constant describing how to begin a comment in the target 1062 assembler language. The compiler assumes that the comment will end at 1063 the end of the line. */ 1064 1065 #define ASM_COMMENT_START ";" 1066 1067 /* Output to assembler file text saying following lines 1068 may contain character constants, extra white space, comments, etc. */ 1069 1070 #define ASM_APP_ON "" 1071 1072 /* Output to assembler file text saying following lines 1073 no longer contain unusual constructs. */ 1074 1075 #define ASM_APP_OFF "" 1076 1077 /* This is how to output the definition of a user-level label named NAME, 1078 such as the label on a static function or variable NAME. */ 1079 1080 #define ASM_OUTPUT_LABEL(FILE,NAME) \ 1081 do { \ 1082 assemble_name ((FILE), (NAME)); \ 1083 if (TARGET_GAS) \ 1084 fputs (":\n", (FILE)); \ 1085 else \ 1086 fputc ('\n', (FILE)); \ 1087 } while (0) 1088 1089 /* This is how to output a reference to a user-level label named NAME. 1090 `assemble_name' uses this. */ 1091 1092 #define ASM_OUTPUT_LABELREF(FILE,NAME) \ 1093 do { \ 1094 const char *xname = (NAME); \ 1095 if (FUNCTION_NAME_P (NAME)) \ 1096 xname += 1; \ 1097 if (xname[0] == '*') \ 1098 xname += 1; \ 1099 else \ 1100 fputs (user_label_prefix, FILE); \ 1101 fputs (xname, FILE); \ 1102 } while (0) 1103 1104 /* This how we output the symbol_ref X. */ 1105 1106 #define ASM_OUTPUT_SYMBOL_REF(FILE,X) \ 1107 do { \ 1108 SYMBOL_REF_FLAGS (X) |= SYMBOL_FLAG_REFERENCED; \ 1109 assemble_name (FILE, XSTR (X, 0)); \ 1110 } while (0) 1111 1112 /* This is how to store into the string LABEL 1113 the symbol_ref name of an internal numbered label where 1114 PREFIX is the class of label and NUM is the number within the class. 1115 This is suitable for output with `assemble_name'. */ 1116 1117 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \ 1118 do \ 1119 { \ 1120 char *__p; \ 1121 (LABEL)[0] = '*'; \ 1122 (LABEL)[1] = (PREFIX)[0]; \ 1123 (LABEL)[2] = '$'; \ 1124 __p = stpcpy (&(LABEL)[3], &(PREFIX)[1]); \ 1125 sprint_ul (__p, (unsigned long) (NUM)); \ 1126 } \ 1127 while (0) 1128 1129 1130 /* Output the definition of a compiler-generated label named NAME. */ 1131 1132 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,NAME) \ 1133 do { \ 1134 assemble_name_raw ((FILE), (NAME)); \ 1135 if (TARGET_GAS) \ 1136 fputs (":\n", (FILE)); \ 1137 else \ 1138 fputc ('\n', (FILE)); \ 1139 } while (0) 1140 1141 #define TARGET_ASM_GLOBALIZE_LABEL pa_globalize_label 1142 1143 #define ASM_OUTPUT_ASCII(FILE, P, SIZE) \ 1144 pa_output_ascii ((FILE), (P), (SIZE)) 1145 1146 /* Jump tables are always placed in the text section. We have to do 1147 this for the HP-UX SOM target as we can't switch sections in the 1148 middle of a function. 1149 1150 On ELF targets, it is possible to put them in the readonly-data section. 1151 This would get the table out of .text and reduce branch lengths. 1152 1153 A downside is that an additional insn (addil) is needed to access 1154 the table when generating PIC code. The address difference table 1155 also has to use 32-bit pc-relative relocations. 1156 1157 The table entries need to look like "$L1+(.+8-$L0)-$PIC_pcrel$0" 1158 when using ELF GAS. A simple difference can be used when using 1159 the HP assembler. 1160 1161 The final downside is GDB complains about the nesting of the label 1162 for the table. */ 1163 1164 #define JUMP_TABLES_IN_TEXT_SECTION 1 1165 1166 /* This is how to output an element of a case-vector that is absolute. */ 1167 1168 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ 1169 fprintf (FILE, "\t.word L$%d\n", VALUE) 1170 1171 /* This is how to output an element of a case-vector that is relative. 1172 Since we always place jump tables in the text section, the difference 1173 is absolute and requires no relocation. */ 1174 1175 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ 1176 fprintf (FILE, "\t.word L$%d-L$%d\n", VALUE, REL) 1177 1178 /* This is how to output an absolute case-vector. */ 1179 1180 #define ASM_OUTPUT_ADDR_VEC(LAB,BODY) \ 1181 pa_output_addr_vec ((LAB),(BODY)) 1182 1183 /* This is how to output a relative case-vector. */ 1184 1185 #define ASM_OUTPUT_ADDR_DIFF_VEC(LAB,BODY) \ 1186 pa_output_addr_diff_vec ((LAB),(BODY)) 1187 1188 /* This is how to output an assembler line that says to advance the 1189 location counter to a multiple of 2**LOG bytes. */ 1190 1191 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ 1192 fprintf (FILE, "\t.align %d\n", (1 << (LOG))) 1193 1194 #define ASM_OUTPUT_SKIP(FILE,SIZE) \ 1195 fprintf (FILE, "\t.blockz " HOST_WIDE_INT_PRINT_UNSIGNED"\n", \ 1196 (unsigned HOST_WIDE_INT)(SIZE)) 1197 1198 /* This says how to output an assembler line to define an uninitialized 1199 global variable with size SIZE (in bytes) and alignment ALIGN (in bits). 1200 This macro exists to properly support languages like C++ which do not 1201 have common data. */ 1202 1203 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 1204 pa_asm_output_aligned_bss (FILE, NAME, SIZE, ALIGN) 1205 1206 /* This says how to output an assembler line to define a global common symbol 1207 with size SIZE (in bytes) and alignment ALIGN (in bits). */ 1208 1209 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \ 1210 pa_asm_output_aligned_common (FILE, NAME, SIZE, ALIGN) 1211 1212 /* This says how to output an assembler line to define a local common symbol 1213 with size SIZE (in bytes) and alignment ALIGN (in bits). This macro 1214 controls how the assembler definitions of uninitialized static variables 1215 are output. */ 1216 1217 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \ 1218 pa_asm_output_aligned_local (FILE, NAME, SIZE, ALIGN) 1219 1220 /* All HP assemblers use "!" to separate logical lines. */ 1221 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C, STR) ((C) == '!') 1222 1223 /* Print operand X (an rtx) in assembler syntax to file FILE. 1224 CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified. 1225 For `%' followed by punctuation, CODE is the punctuation and X is null. 1226 1227 On the HP-PA, the CODE can be `r', meaning this is a register-only operand 1228 and an immediate zero should be represented as `r0'. 1229 1230 Several % codes are defined: 1231 O an operation 1232 C compare conditions 1233 N extract conditions 1234 M modifier to handle preincrement addressing for memory refs. 1235 F modifier to handle preincrement addressing for fp memory refs */ 1236 1237 #define PRINT_OPERAND(FILE, X, CODE) pa_print_operand (FILE, X, CODE) 1238 1239 1240 /* Print a memory address as an operand to reference that memory location. */ 1241 1242 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \ 1243 { rtx addr = ADDR; \ 1244 switch (GET_CODE (addr)) \ 1245 { \ 1246 case REG: \ 1247 fprintf (FILE, "0(%s)", reg_names [REGNO (addr)]); \ 1248 break; \ 1249 case PLUS: \ 1250 gcc_assert (GET_CODE (XEXP (addr, 1)) == CONST_INT); \ 1251 fprintf (FILE, "%d(%s)", (int)INTVAL (XEXP (addr, 1)), \ 1252 reg_names [REGNO (XEXP (addr, 0))]); \ 1253 break; \ 1254 case LO_SUM: \ 1255 if (!symbolic_operand (XEXP (addr, 1), VOIDmode)) \ 1256 fputs ("R'", FILE); \ 1257 else if (flag_pic == 0) \ 1258 fputs ("RR'", FILE); \ 1259 else \ 1260 fputs ("RT'", FILE); \ 1261 pa_output_global_address (FILE, XEXP (addr, 1), 0); \ 1262 fputs ("(", FILE); \ 1263 output_operand (XEXP (addr, 0), 0); \ 1264 fputs (")", FILE); \ 1265 break; \ 1266 case CONST_INT: \ 1267 fprintf (FILE, HOST_WIDE_INT_PRINT_DEC "(%%r0)", INTVAL (addr)); \ 1268 break; \ 1269 default: \ 1270 output_addr_const (FILE, addr); \ 1271 }} 1272 1273 1274 /* Find the return address associated with the frame given by 1275 FRAMEADDR. */ 1276 #define RETURN_ADDR_RTX(COUNT, FRAMEADDR) \ 1277 (pa_return_addr_rtx (COUNT, FRAMEADDR)) 1278 1279 /* Used to mask out junk bits from the return address, such as 1280 processor state, interrupt status, condition codes and the like. */ 1281 #define MASK_RETURN_ADDR \ 1282 /* The privilege level is in the two low order bits, mask em out \ 1283 of the return address. */ \ 1284 (GEN_INT (-4)) 1285 1286 /* We need a libcall to canonicalize function pointers on TARGET_ELF32. */ 1287 #define CANONICALIZE_FUNCPTR_FOR_COMPARE_LIBCALL \ 1288 "__canonicalize_funcptr_for_compare" 1289 1290 #ifdef HAVE_AS_TLS 1291 #undef TARGET_HAVE_TLS 1292 #define TARGET_HAVE_TLS true 1293 #endif 1294 1295 /* The maximum offset in bytes for a PA 1.X pc-relative call to the 1296 head of the preceding stub table. A long branch stub is two or three 1297 instructions for non-PIC and PIC, respectively. Import stubs are 1298 seven and five instructions for HP-UX and ELF targets, respectively. 1299 The default stub group size for ELF targets is 217856 bytes. 1300 FIXME: We need an option to set the maximum offset. */ 1301 #define MAX_PCREL17F_OFFSET (TARGET_HPUX ? 198164 : 217856) 1302 1303 #define NEED_INDICATE_EXEC_STACK 0 1304 1305 /* Target CPU versions for D. */ 1306 #define TARGET_D_CPU_VERSIONS pa_d_target_versions 1307 1308 /* Output default function prologue for hpux. */ 1309 #define TARGET_ASM_FUNCTION_PROLOGUE pa_output_function_prologue 1310