1 /*{{{ Comment. */ 2 3 /* Definitions of FR30 target. 4 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004, 2007, 2008, 2009 5 Free Software Foundation, Inc. 6 Contributed by Cygnus Solutions. 7 8 This file is part of GCC. 9 10 GCC is free software; you can redistribute it and/or modify 11 it under the terms of the GNU General Public License as published by 12 the Free Software Foundation; either version 3, or (at your option) 13 any later version. 14 15 GCC is distributed in the hope that it will be useful, 16 but WITHOUT ANY WARRANTY; without even the implied warranty of 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 GNU General Public License for more details. 19 20 You should have received a copy of the GNU General Public License 21 along with GCC; see the file COPYING3. If not see 22 <http://www.gnu.org/licenses/>. */ 23 24 /*}}}*/ 25 /*{{{ Driver configuration. */ 26 27 /* Defined in svr4.h. */ 28 #undef SWITCH_TAKES_ARG 29 30 /* Defined in svr4.h. */ 31 #undef WORD_SWITCH_TAKES_ARG 32 33 /*}}}*/ 34 /*{{{ Run-time target specifications. */ 35 36 #undef ASM_SPEC 37 #define ASM_SPEC "%{v}" 38 39 /* Define this to be a string constant containing `-D' options to define the 40 predefined macros that identify this machine and system. These macros will 41 be predefined unless the `-ansi' option is specified. */ 42 43 #define TARGET_CPU_CPP_BUILTINS() \ 44 do \ 45 { \ 46 builtin_define_std ("fr30"); \ 47 builtin_assert ("machine=fr30"); \ 48 } \ 49 while (0) 50 51 #define TARGET_VERSION fprintf (stderr, " (fr30)"); 52 53 #define CAN_DEBUG_WITHOUT_FP 54 55 #undef STARTFILE_SPEC 56 #define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s" 57 58 /* Include the OS stub library, so that the code can be simulated. 59 This is not the right way to do this. Ideally this kind of thing 60 should be done in the linker script - but I have not worked out how 61 to specify the location of a linker script in a gcc command line yet... */ 62 #undef ENDFILE_SPEC 63 #define ENDFILE_SPEC "%{!mno-lsim:-lsim} crtend.o%s crtn.o%s" 64 65 /*}}}*/ 66 /*{{{ Storage Layout. */ 67 68 #define BITS_BIG_ENDIAN 1 69 70 #define BYTES_BIG_ENDIAN 1 71 72 #define WORDS_BIG_ENDIAN 1 73 74 #define UNITS_PER_WORD 4 75 76 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ 77 do \ 78 { \ 79 if (GET_MODE_CLASS (MODE) == MODE_INT \ 80 && GET_MODE_SIZE (MODE) < 4) \ 81 (MODE) = SImode; \ 82 } \ 83 while (0) 84 85 #define PARM_BOUNDARY 32 86 87 #define STACK_BOUNDARY 32 88 89 #define FUNCTION_BOUNDARY 32 90 91 #define BIGGEST_ALIGNMENT 32 92 93 #define DATA_ALIGNMENT(TYPE, ALIGN) \ 94 (TREE_CODE (TYPE) == ARRAY_TYPE \ 95 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \ 96 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN)) 97 98 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \ 99 (TREE_CODE (EXP) == STRING_CST \ 100 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN)) 101 102 #define STRICT_ALIGNMENT 1 103 104 /* Defined in svr4.h. */ 105 #define PCC_BITFIELD_TYPE_MATTERS 1 106 107 /*}}}*/ 108 /*{{{ Layout of Source Language Data Types. */ 109 110 #define SHORT_TYPE_SIZE 16 111 #define INT_TYPE_SIZE 32 112 #define LONG_TYPE_SIZE 32 113 #define LONG_LONG_TYPE_SIZE 64 114 #define FLOAT_TYPE_SIZE 32 115 #define DOUBLE_TYPE_SIZE 64 116 #define LONG_DOUBLE_TYPE_SIZE 64 117 118 #define DEFAULT_SIGNED_CHAR 1 119 120 /*}}}*/ 121 /*{{{ REGISTER BASICS. */ 122 123 /* Number of hardware registers known to the compiler. They receive numbers 0 124 through `FIRST_PSEUDO_REGISTER-1'; thus, the first pseudo register's number 125 really is assigned the number `FIRST_PSEUDO_REGISTER'. */ 126 #define FIRST_PSEUDO_REGISTER 21 127 128 /* Fixed register assignments: */ 129 130 /* Here we do a BAD THING - reserve a register for use by the machine 131 description file. There are too many places in compiler where it 132 assumes that it can issue a branch or jump instruction without 133 providing a scratch register for it, and reload just cannot cope, so 134 we keep a register back for these situations. */ 135 #define COMPILER_SCRATCH_REGISTER 0 136 137 /* The register that contains the result of a function call. */ 138 #define RETURN_VALUE_REGNUM 4 139 140 /* The first register that can contain the arguments to a function. */ 141 #define FIRST_ARG_REGNUM 4 142 143 /* A call-used register that can be used during the function prologue. */ 144 #define PROLOGUE_TMP_REGNUM COMPILER_SCRATCH_REGISTER 145 146 /* Register numbers used for passing a function's static chain pointer. If 147 register windows are used, the register number as seen by the called 148 function is `STATIC_CHAIN_INCOMING_REGNUM', while the register number as 149 seen by the calling function is `STATIC_CHAIN_REGNUM'. If these registers 150 are the same, `STATIC_CHAIN_INCOMING_REGNUM' need not be defined. 151 152 The static chain register need not be a fixed register. 153 154 If the static chain is passed in memory, these macros should not be defined; 155 instead, the next two macros should be defined. */ 156 #define STATIC_CHAIN_REGNUM 12 157 /* #define STATIC_CHAIN_INCOMING_REGNUM */ 158 159 /* An FR30 specific hardware register. */ 160 #define ACCUMULATOR_REGNUM 13 161 162 /* The register number of the frame pointer register, which is used to access 163 automatic variables in the stack frame. On some machines, the hardware 164 determines which register this is. On other machines, you can choose any 165 register you wish for this purpose. */ 166 #define FRAME_POINTER_REGNUM 14 167 168 /* The register number of the stack pointer register, which must also be a 169 fixed register according to `FIXED_REGISTERS'. On most machines, the 170 hardware determines which register this is. */ 171 #define STACK_POINTER_REGNUM 15 172 173 /* The following a fake hard registers that describe some of the dedicated 174 registers on the FR30. */ 175 #define CONDITION_CODE_REGNUM 16 176 #define RETURN_POINTER_REGNUM 17 177 #define MD_HIGH_REGNUM 18 178 #define MD_LOW_REGNUM 19 179 180 /* An initializer that says which registers are used for fixed purposes all 181 throughout the compiled code and are therefore not available for general 182 allocation. These would include the stack pointer, the frame pointer 183 (except on machines where that can be used as a general register when no 184 frame pointer is needed), the program counter on machines where that is 185 considered one of the addressable registers, and any other numbered register 186 with a standard use. 187 188 This information is expressed as a sequence of numbers, separated by commas 189 and surrounded by braces. The Nth number is 1 if register N is fixed, 0 190 otherwise. 191 192 The table initialized from this macro, and the table initialized by the 193 following one, may be overridden at run time either automatically, by the 194 actions of the macro `CONDITIONAL_REGISTER_USAGE', or by the user with the 195 command options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'. */ 196 #define FIXED_REGISTERS \ 197 { 1, 0, 0, 0, 0, 0, 0, 0, /* 0 - 7 */ \ 198 0, 0, 0, 0, 0, 0, 0, 1, /* 8 - 15 */ \ 199 1, 1, 1, 1, 1 } /* 16 - 20 */ 200 201 /* XXX - MDL and MDH set as fixed for now - this is until I can get the 202 mul patterns working. */ 203 204 /* Like `FIXED_REGISTERS' but has 1 for each register that is clobbered (in 205 general) by function calls as well as for fixed registers. This macro 206 therefore identifies the registers that are not available for general 207 allocation of values that must live across function calls. 208 209 If a register has 0 in `CALL_USED_REGISTERS', the compiler automatically 210 saves it on function entry and restores it on function exit, if the register 211 is used within the function. */ 212 #define CALL_USED_REGISTERS \ 213 { 1, 1, 1, 1, 1, 1, 1, 1, /* 0 - 7 */ \ 214 0, 0, 0, 0, 1, 1, 0, 1, /* 8 - 15 */ \ 215 1, 1, 1, 1, 1 } /* 16 - 20 */ 216 217 /* A C initializer containing the assembler's names for the machine registers, 218 each one as a C string constant. This is what translates register numbers 219 in the compiler into assembler language. */ 220 #define REGISTER_NAMES \ 221 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ 222 "r8", "r9", "r10", "r11", "r12", "ac", "fp", "sp", \ 223 "cc", "rp", "mdh", "mdl", "ap" \ 224 } 225 226 /* If defined, a C initializer for an array of structures containing a name and 227 a register number. This macro defines additional names for hard registers, 228 thus allowing the `asm' option in declarations to refer to registers using 229 alternate names. */ 230 #define ADDITIONAL_REGISTER_NAMES \ 231 { \ 232 {"r13", 13}, {"r14", 14}, {"r15", 15}, {"usp", 15}, {"ps", 16}\ 233 } 234 235 /*}}}*/ 236 /*{{{ How Values Fit in Registers. */ 237 238 /* A C expression for the number of consecutive hard registers, starting at 239 register number REGNO, required to hold a value of mode MODE. */ 240 241 #define HARD_REGNO_NREGS(REGNO, MODE) \ 242 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) 243 244 /* A C expression that is nonzero if it is permissible to store a value of mode 245 MODE in hard register number REGNO (or in several registers starting with 246 that one). */ 247 248 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1 249 250 /* A C expression that is nonzero if it is desirable to choose register 251 allocation so as to avoid move instructions between a value of mode MODE1 252 and a value of mode MODE2. 253 254 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, MODE2)' are 255 ever different for any R, then `MODES_TIEABLE_P (MODE1, MODE2)' must be 256 zero. */ 257 #define MODES_TIEABLE_P(MODE1, MODE2) 1 258 259 /*}}}*/ 260 /*{{{ Register Classes. */ 261 262 /* An enumeral type that must be defined with all the register class names as 263 enumeral values. `NO_REGS' must be first. `ALL_REGS' must be the last 264 register class, followed by one more enumeral value, `LIM_REG_CLASSES', 265 which is not a register class but rather tells how many classes there are. 266 267 Each register class has a number, which is the value of casting the class 268 name to type `int'. The number serves as an index in many of the tables 269 described below. */ 270 enum reg_class 271 { 272 NO_REGS, 273 MULTIPLY_32_REG, /* the MDL register as used by the MULH, MULUH insns */ 274 MULTIPLY_64_REG, /* the MDH,MDL register pair as used by MUL and MULU */ 275 LOW_REGS, /* registers 0 through 7 */ 276 HIGH_REGS, /* registers 8 through 15 */ 277 REAL_REGS, /* i.e. all the general hardware registers on the FR30 */ 278 ALL_REGS, 279 LIM_REG_CLASSES 280 }; 281 282 #define GENERAL_REGS REAL_REGS 283 #define N_REG_CLASSES ((int) LIM_REG_CLASSES) 284 285 #define IRA_COVER_CLASSES \ 286 { \ 287 REAL_REGS, MULTIPLY_64_REG, LIM_REG_CLASSES \ 288 } 289 290 /* An initializer containing the names of the register classes as C string 291 constants. These names are used in writing some of the debugging dumps. */ 292 #define REG_CLASS_NAMES \ 293 { \ 294 "NO_REGS", \ 295 "MULTIPLY_32_REG", \ 296 "MULTIPLY_64_REG", \ 297 "LOW_REGS", \ 298 "HIGH_REGS", \ 299 "REAL_REGS", \ 300 "ALL_REGS" \ 301 } 302 303 /* An initializer containing the contents of the register classes, as integers 304 which are bit masks. The Nth integer specifies the contents of class N. 305 The way the integer MASK is interpreted is that register R is in the class 306 if `MASK & (1 << R)' is 1. 307 308 When the machine has more than 32 registers, an integer does not suffice. 309 Then the integers are replaced by sub-initializers, braced groupings 310 containing several integers. Each sub-initializer must be suitable as an 311 initializer for the type `HARD_REG_SET' which is defined in 312 `hard-reg-set.h'. */ 313 #define REG_CLASS_CONTENTS \ 314 { \ 315 { 0 }, \ 316 { 1 << MD_LOW_REGNUM }, \ 317 { (1 << MD_LOW_REGNUM) | (1 << MD_HIGH_REGNUM) }, \ 318 { (1 << 8) - 1 }, \ 319 { ((1 << 8) - 1) << 8 }, \ 320 { (1 << CONDITION_CODE_REGNUM) - 1 }, \ 321 { (1 << FIRST_PSEUDO_REGISTER) - 1 } \ 322 } 323 324 /* A C expression whose value is a register class containing hard register 325 REGNO. In general there is more than one such class; choose a class which 326 is "minimal", meaning that no smaller class also contains the register. */ 327 #define REGNO_REG_CLASS(REGNO) \ 328 ( (REGNO) < 8 ? LOW_REGS \ 329 : (REGNO) < CONDITION_CODE_REGNUM ? HIGH_REGS \ 330 : (REGNO) == MD_LOW_REGNUM ? MULTIPLY_32_REG \ 331 : (REGNO) == MD_HIGH_REGNUM ? MULTIPLY_64_REG \ 332 : ALL_REGS) 333 334 /* A macro whose definition is the name of the class to which a valid base 335 register must belong. A base register is one used in an address which is 336 the register value plus a displacement. */ 337 #define BASE_REG_CLASS REAL_REGS 338 339 /* A macro whose definition is the name of the class to which a valid index 340 register must belong. An index register is one used in an address where its 341 value is either multiplied by a scale factor or added to another register 342 (as well as added to a displacement). */ 343 #define INDEX_REG_CLASS REAL_REGS 344 345 /* A C expression which defines the machine-dependent operand constraint 346 letters for register classes. If CHAR is such a letter, the value should be 347 the register class corresponding to it. Otherwise, the value should be 348 `NO_REGS'. The register letter `r', corresponding to class `GENERAL_REGS', 349 will not be passed to this macro; you do not need to handle it. 350 351 The following letters are unavailable, due to being used as 352 constraints: 353 '0'..'9' 354 '<', '>' 355 'E', 'F', 'G', 'H' 356 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P' 357 'Q', 'R', 'S', 'T', 'U' 358 'V', 'X' 359 'g', 'i', 'm', 'n', 'o', 'p', 'r', 's' */ 360 361 #define REG_CLASS_FROM_LETTER(CHAR) \ 362 ( (CHAR) == 'd' ? MULTIPLY_64_REG \ 363 : (CHAR) == 'e' ? MULTIPLY_32_REG \ 364 : (CHAR) == 'h' ? HIGH_REGS \ 365 : (CHAR) == 'l' ? LOW_REGS \ 366 : (CHAR) == 'a' ? ALL_REGS \ 367 : NO_REGS) 368 369 /* A C expression which is nonzero if register number NUM is suitable for use 370 as a base register in operand addresses. It may be either a suitable hard 371 register or a pseudo register that has been allocated such a hard register. */ 372 #define REGNO_OK_FOR_BASE_P(NUM) 1 373 374 /* A C expression which is nonzero if register number NUM is suitable for use 375 as an index register in operand addresses. It may be either a suitable hard 376 register or a pseudo register that has been allocated such a hard register. 377 378 The difference between an index register and a base register is that the 379 index register may be scaled. If an address involves the sum of two 380 registers, neither one of them scaled, then either one may be labeled the 381 "base" and the other the "index"; but whichever labeling is used must fit 382 the machine's constraints of which registers may serve in each capacity. 383 The compiler will try both labelings, looking for one that is valid, and 384 will reload one or both registers only if neither labeling works. */ 385 #define REGNO_OK_FOR_INDEX_P(NUM) 1 386 387 /* A C expression that places additional restrictions on the register class to 388 use when it is necessary to copy value X into a register in class CLASS. 389 The value is a register class; perhaps CLASS, or perhaps another, smaller 390 class. On many machines, the following definition is safe: 391 392 #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS 393 394 Sometimes returning a more restrictive class makes better code. For 395 example, on the 68000, when X is an integer constant that is in range for a 396 `moveq' instruction, the value of this macro is always `DATA_REGS' as long 397 as CLASS includes the data registers. Requiring a data register guarantees 398 that a `moveq' will be used. 399 400 If X is a `const_double', by returning `NO_REGS' you can force X into a 401 memory constant. This is useful on certain machines where immediate 402 floating values cannot be loaded into certain kinds of registers. */ 403 #define PREFERRED_RELOAD_CLASS(X, CLASS) CLASS 404 405 /* A C expression for the maximum number of consecutive registers of 406 class CLASS needed to hold a value of mode MODE. 407 408 This is closely related to the macro `HARD_REGNO_NREGS'. In fact, the value 409 of the macro `CLASS_MAX_NREGS (CLASS, MODE)' should be the maximum value of 410 `HARD_REGNO_NREGS (REGNO, MODE)' for all REGNO values in the class CLASS. 411 412 This macro helps control the handling of multiple-word values in 413 the reload pass. */ 414 #define CLASS_MAX_NREGS(CLASS, MODE) HARD_REGNO_NREGS (0, MODE) 415 416 /*}}}*/ 417 /*{{{ CONSTANTS. */ 418 419 /* A C expression that defines the machine-dependent operand constraint letters 420 (`I', `J', `K', .. 'P') that specify particular ranges of integer values. 421 If C is one of those letters, the expression should check that VALUE, an 422 integer, is in the appropriate range and return 1 if so, 0 otherwise. If C 423 is not one of those letters, the value should be 0 regardless of VALUE. */ 424 #define CONST_OK_FOR_LETTER_P(VALUE, C) \ 425 ( (C) == 'I' ? IN_RANGE (VALUE, 0, 15) \ 426 : (C) == 'J' ? IN_RANGE (VALUE, -16, -1) \ 427 : (C) == 'K' ? IN_RANGE (VALUE, 16, 31) \ 428 : (C) == 'L' ? IN_RANGE (VALUE, 0, (1 << 8) - 1) \ 429 : (C) == 'M' ? IN_RANGE (VALUE, 0, (1 << 20) - 1) \ 430 : (C) == 'P' ? IN_RANGE (VALUE, -(1 << 8), (1 << 8) - 1) \ 431 : 0) 432 433 /* A C expression that defines the machine-dependent operand constraint letters 434 (`G', `H') that specify particular ranges of `const_double' values. 435 436 If C is one of those letters, the expression should check that VALUE, an RTX 437 of code `const_double', is in the appropriate range and return 1 if so, 0 438 otherwise. If C is not one of those letters, the value should be 0 439 regardless of VALUE. 440 441 `const_double' is used for all floating-point constants and for `DImode' 442 fixed-point constants. A given letter can accept either or both kinds of 443 values. It can use `GET_MODE' to distinguish between these kinds. */ 444 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) 0 445 446 /* A C expression that defines the optional machine-dependent constraint 447 letters (`Q', `R', `S', `T', `U') that can be used to segregate specific 448 types of operands, usually memory references, for the target machine. 449 Normally this macro will not be defined. If it is required for a particular 450 target machine, it should return 1 if VALUE corresponds to the operand type 451 represented by the constraint letter C. If C is not defined as an extra 452 constraint, the value returned should be 0 regardless of VALUE. 453 454 For example, on the ROMP, load instructions cannot have their output in r0 455 if the memory reference contains a symbolic address. Constraint letter `Q' 456 is defined as representing a memory address that does *not* contain a 457 symbolic address. An alternative is specified with a `Q' constraint on the 458 input and `r' on the output. The next alternative specifies `m' on the 459 input and a register class that does not include r0 on the output. */ 460 #define EXTRA_CONSTRAINT(VALUE, C) \ 461 ((C) == 'Q' ? (GET_CODE (VALUE) == MEM && GET_CODE (XEXP (VALUE, 0)) == SYMBOL_REF) : 0) 462 463 /*}}}*/ 464 /*{{{ Basic Stack Layout. */ 465 466 /* Define this macro if pushing a word onto the stack moves the stack pointer 467 to a smaller address. */ 468 #define STACK_GROWS_DOWNWARD 1 469 470 /* Define this to macro nonzero if the addresses of local variable slots 471 are at negative offsets from the frame pointer. */ 472 #define FRAME_GROWS_DOWNWARD 1 473 474 /* Offset from the frame pointer to the first local variable slot to be 475 allocated. 476 477 If `FRAME_GROWS_DOWNWARD', find the next slot's offset by subtracting the 478 first slot's length from `STARTING_FRAME_OFFSET'. Otherwise, it is found by 479 adding the length of the first slot to the value `STARTING_FRAME_OFFSET'. */ 480 /* #define STARTING_FRAME_OFFSET -4 */ 481 #define STARTING_FRAME_OFFSET 0 482 483 /* Offset from the stack pointer register to the first location at which 484 outgoing arguments are placed. If not specified, the default value of zero 485 is used. This is the proper value for most machines. 486 487 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first 488 location at which outgoing arguments are placed. */ 489 #define STACK_POINTER_OFFSET 0 490 491 /* Offset from the argument pointer register to the first argument's address. 492 On some machines it may depend on the data type of the function. 493 494 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first 495 argument's address. */ 496 #define FIRST_PARM_OFFSET(FUNDECL) 0 497 498 /* A C expression whose value is RTL representing the location of the incoming 499 return address at the beginning of any function, before the prologue. This 500 RTL is either a `REG', indicating that the return value is saved in `REG', 501 or a `MEM' representing a location in the stack. 502 503 You only need to define this macro if you want to support call frame 504 debugging information like that provided by DWARF 2. */ 505 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (SImode, RETURN_POINTER_REGNUM) 506 507 /*}}}*/ 508 /*{{{ Register That Address the Stack Frame. */ 509 510 /* The register number of the arg pointer register, which is used to access the 511 function's argument list. On some machines, this is the same as the frame 512 pointer register. On some machines, the hardware determines which register 513 this is. On other machines, you can choose any register you wish for this 514 purpose. If this is not the same register as the frame pointer register, 515 then you must mark it as a fixed register according to `FIXED_REGISTERS', or 516 arrange to be able to eliminate it. */ 517 #define ARG_POINTER_REGNUM 20 518 519 /*}}}*/ 520 /*{{{ Eliminating the Frame Pointer and the Arg Pointer. */ 521 522 /* If defined, this macro specifies a table of register pairs used to eliminate 523 unneeded registers that point into the stack frame. If it is not defined, 524 the only elimination attempted by the compiler is to replace references to 525 the frame pointer with references to the stack pointer. 526 527 The definition of this macro is a list of structure initializations, each of 528 which specifies an original and replacement register. 529 530 On some machines, the position of the argument pointer is not known until 531 the compilation is completed. In such a case, a separate hard register must 532 be used for the argument pointer. This register can be eliminated by 533 replacing it with either the frame pointer or the argument pointer, 534 depending on whether or not the frame pointer has been eliminated. 535 536 In this case, you might specify: 537 #define ELIMINABLE_REGS \ 538 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ 539 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \ 540 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}} 541 542 Note that the elimination of the argument pointer with the stack pointer is 543 specified first since that is the preferred elimination. */ 544 545 #define ELIMINABLE_REGS \ 546 { \ 547 {ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ 548 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \ 549 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM} \ 550 } 551 552 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It specifies the 553 initial difference between the specified pair of registers. This macro must 554 be defined if `ELIMINABLE_REGS' is defined. */ 555 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ 556 (OFFSET) = fr30_compute_frame_size (FROM, TO) 557 558 /*}}}*/ 559 /*{{{ Passing Function Arguments on the Stack. */ 560 561 /* If defined, the maximum amount of space required for outgoing arguments will 562 be computed and placed into the variable 563 `crtl->outgoing_args_size'. No space will be pushed onto the 564 stack for each call; instead, the function prologue should increase the 565 stack frame size by this amount. 566 567 Defining both `PUSH_ROUNDING' and `ACCUMULATE_OUTGOING_ARGS' is not 568 proper. */ 569 #define ACCUMULATE_OUTGOING_ARGS 1 570 571 /* A C expression that should indicate the number of bytes of its own arguments 572 that a function pops on returning, or 0 if the function pops no arguments 573 and the caller must therefore pop them all after the function returns. 574 575 FUNDECL is a C variable whose value is a tree node that describes the 576 function in question. Normally it is a node of type `FUNCTION_DECL' that 577 describes the declaration of the function. From this it is possible to 578 obtain the DECL_ATTRIBUTES of the function. 579 580 FUNTYPE is a C variable whose value is a tree node that describes the 581 function in question. Normally it is a node of type `FUNCTION_TYPE' that 582 describes the data type of the function. From this it is possible to obtain 583 the data types of the value and arguments (if known). 584 585 When a call to a library function is being considered, FUNTYPE will contain 586 an identifier node for the library function. Thus, if you need to 587 distinguish among various library functions, you can do so by their names. 588 Note that "library function" in this context means a function used to 589 perform arithmetic, whose name is known specially in the compiler and was 590 not mentioned in the C code being compiled. 591 592 STACK-SIZE is the number of bytes of arguments passed on the stack. If a 593 variable number of bytes is passed, it is zero, and argument popping will 594 always be the responsibility of the calling function. 595 596 On the VAX, all functions always pop their arguments, so the definition of 597 this macro is STACK-SIZE. On the 68000, using the standard calling 598 convention, no functions pop their arguments, so the value of the macro is 599 always 0 in this case. But an alternative calling convention is available 600 in which functions that take a fixed number of arguments pop them but other 601 functions (such as `printf') pop nothing (the caller pops all). When this 602 convention is in use, FUNTYPE is examined to determine whether a function 603 takes a fixed number of arguments. */ 604 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0 605 606 /*}}}*/ 607 /*{{{ Function Arguments in Registers. */ 608 609 /* The number of register assigned to holding function arguments. */ 610 611 #define FR30_NUM_ARG_REGS 4 612 613 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ 614 ( (NAMED) == 0 ? NULL_RTX \ 615 : targetm.calls.must_pass_in_stack (MODE, TYPE) ? NULL_RTX \ 616 : (CUM) >= FR30_NUM_ARG_REGS ? NULL_RTX \ 617 : gen_rtx_REG (MODE, CUM + FIRST_ARG_REGNUM)) 618 619 /* A C type for declaring a variable that is used as the first argument of 620 `FUNCTION_ARG' and other related values. For some target machines, the type 621 `int' suffices and can hold the number of bytes of argument so far. 622 623 There is no need to record in `CUMULATIVE_ARGS' anything about the arguments 624 that have been passed on the stack. The compiler has other variables to 625 keep track of that. For target machines on which all arguments are passed 626 on the stack, there is no need to store anything in `CUMULATIVE_ARGS'; 627 however, the data structure must exist and should not be empty, so use 628 `int'. */ 629 /* On the FR30 this value is an accumulating count of the number of argument 630 registers that have been filled with argument values, as opposed to say, 631 the number of bytes of argument accumulated so far. */ 632 #define CUMULATIVE_ARGS int 633 634 /* A C statement (sans semicolon) for initializing the variable CUM for the 635 state at the beginning of the argument list. The variable has type 636 `CUMULATIVE_ARGS'. The value of FNTYPE is the tree node for the data type 637 of the function which will receive the args, or 0 if the args are to a 638 compiler support library function. The value of INDIRECT is nonzero when 639 processing an indirect call, for example a call through a function pointer. 640 The value of INDIRECT is zero for a call to an explicitly named function, a 641 library function call, or when `INIT_CUMULATIVE_ARGS' is used to find 642 arguments for the function being compiled. 643 644 When processing a call to a compiler support library function, LIBNAME 645 identifies which one. It is a `symbol_ref' rtx which contains the name of 646 the function, as a string. LIBNAME is 0 when an ordinary C function call is 647 being processed. Thus, each time this macro is called, either LIBNAME or 648 FNTYPE is nonzero, but never both of them at once. */ 649 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \ 650 (CUM) = 0 651 652 /* A C statement (sans semicolon) to update the summarizer variable CUM to 653 advance past an argument in the argument list. The values MODE, TYPE and 654 NAMED describe that argument. Once this is done, the variable CUM is 655 suitable for analyzing the *following* argument with `FUNCTION_ARG', etc. 656 657 This macro need not do anything if the argument in question was passed on 658 the stack. The compiler knows how to track the amount of stack space used 659 for arguments without any special help. */ 660 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \ 661 (CUM) += (NAMED) * fr30_num_arg_regs (MODE, TYPE) 662 663 /* A C expression that is nonzero if REGNO is the number of a hard register in 664 which function arguments are sometimes passed. This does *not* include 665 implicit arguments such as the static chain and the structure-value address. 666 On many machines, no registers can be used for this purpose since all 667 function arguments are pushed on the stack. */ 668 #define FUNCTION_ARG_REGNO_P(REGNO) \ 669 ((REGNO) >= FIRST_ARG_REGNUM && ((REGNO) < FIRST_ARG_REGNUM + FR30_NUM_ARG_REGS)) 670 671 /*}}}*/ 672 /*{{{ How Scalar Function Values are Returned. */ 673 674 #define FUNCTION_VALUE(VALTYPE, FUNC) \ 675 gen_rtx_REG (TYPE_MODE (VALTYPE), RETURN_VALUE_REGNUM) 676 677 /* A C expression to create an RTX representing the place where a library 678 function returns a value of mode MODE. If the precise function being called 679 is known, FUNC is a tree node (`FUNCTION_DECL') for it; otherwise, FUNC is a 680 null pointer. This makes it possible to use a different value-returning 681 convention for specific functions when all their calls are known. 682 683 Note that "library function" in this context means a compiler support 684 routine, used to perform arithmetic, whose name is known specially by the 685 compiler and was not mentioned in the C code being compiled. 686 687 The definition of `LIBRARY_VALUE' need not be concerned aggregate data 688 types, because none of the library functions returns such types. */ 689 #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, RETURN_VALUE_REGNUM) 690 691 /* A C expression that is nonzero if REGNO is the number of a hard register in 692 which the values of called function may come back. */ 693 694 #define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == RETURN_VALUE_REGNUM) 695 696 /*}}}*/ 697 /*{{{ How Large Values are Returned. */ 698 699 /* Define this macro to be 1 if all structure and union return values must be 700 in memory. Since this results in slower code, this should be defined only 701 if needed for compatibility with other compilers or with an ABI. If you 702 define this macro to be 0, then the conventions used for structure and union 703 return values are decided by the `TARGET_RETURN_IN_MEMORY' macro. 704 705 If not defined, this defaults to the value 1. */ 706 #define DEFAULT_PCC_STRUCT_RETURN 1 707 708 /*}}}*/ 709 /*{{{ Generating Code for Profiling. */ 710 711 /* A C statement or compound statement to output to FILE some assembler code to 712 call the profiling subroutine `mcount'. Before calling, the assembler code 713 must load the address of a counter variable into a register where `mcount' 714 expects to find the address. The name of this variable is `LP' followed by 715 the number LABELNO, so you would generate the name using `LP%d' in a 716 `fprintf'. 717 718 The details of how the address should be passed to `mcount' are determined 719 by your operating system environment, not by GCC. To figure them out, 720 compile a small program for profiling using the system's installed C 721 compiler and look at the assembler code that results. */ 722 #define FUNCTION_PROFILER(FILE, LABELNO) \ 723 { \ 724 fprintf (FILE, "\t mov rp, r1\n" ); \ 725 fprintf (FILE, "\t ldi:32 mcount, r0\n" ); \ 726 fprintf (FILE, "\t call @r0\n" ); \ 727 fprintf (FILE, ".word\tLP%d\n", LABELNO); \ 728 } 729 730 /*}}}*/ 731 /*{{{ Trampolines for Nested Functions. */ 732 733 /* A C expression for the size in bytes of the trampoline, as an integer. */ 734 #define TRAMPOLINE_SIZE 18 735 736 /* We want the trampoline to be aligned on a 32bit boundary so that we can 737 make sure the location of the static chain & target function within 738 the trampoline is also aligned on a 32bit boundary. */ 739 #define TRAMPOLINE_ALIGNMENT 32 740 741 /*}}}*/ 742 /*{{{ Addressing Modes. */ 743 744 /* A number, the maximum number of registers that can appear in a valid memory 745 address. Note that it is up to you to specify a value equal to the maximum 746 number that `GO_IF_LEGITIMATE_ADDRESS' would ever accept. */ 747 #define MAX_REGS_PER_ADDRESS 1 748 749 /* A C compound statement with a conditional `goto LABEL;' executed if X (an 750 RTX) is a legitimate memory address on the target machine for a memory 751 operand of mode MODE. */ 752 753 /* On the FR30 we only have one real addressing mode - an address in a 754 register. There are three special cases however: 755 756 * indexed addressing using small positive offsets from the stack pointer 757 758 * indexed addressing using small signed offsets from the frame pointer 759 760 * register plus register addressing using R13 as the base register. 761 762 At the moment we only support the first two of these special cases. */ 763 764 #ifdef REG_OK_STRICT 765 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \ 766 do \ 767 { \ 768 if (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X)) \ 769 goto LABEL; \ 770 if (GET_CODE (X) == PLUS \ 771 && ((MODE) == SImode || (MODE) == SFmode) \ 772 && GET_CODE (XEXP (X, 0)) == REG \ 773 && REGNO (XEXP (X, 0)) == STACK_POINTER_REGNUM \ 774 && GET_CODE (XEXP (X, 1)) == CONST_INT \ 775 && IN_RANGE (INTVAL (XEXP (X, 1)), 0, (1 << 6) - 4)) \ 776 goto LABEL; \ 777 if (GET_CODE (X) == PLUS \ 778 && ((MODE) == SImode || (MODE) == SFmode) \ 779 && GET_CODE (XEXP (X, 0)) == REG \ 780 && REGNO (XEXP (X, 0)) == FRAME_POINTER_REGNUM \ 781 && GET_CODE (XEXP (X, 1)) == CONST_INT \ 782 && IN_RANGE (INTVAL (XEXP (X, 1)), -(1 << 9), (1 << 9) - 4)) \ 783 goto LABEL; \ 784 } \ 785 while (0) 786 #else 787 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \ 788 do \ 789 { \ 790 if (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X)) \ 791 goto LABEL; \ 792 if (GET_CODE (X) == PLUS \ 793 && ((MODE) == SImode || (MODE) == SFmode) \ 794 && GET_CODE (XEXP (X, 0)) == REG \ 795 && REGNO (XEXP (X, 0)) == STACK_POINTER_REGNUM \ 796 && GET_CODE (XEXP (X, 1)) == CONST_INT \ 797 && IN_RANGE (INTVAL (XEXP (X, 1)), 0, (1 << 6) - 4)) \ 798 goto LABEL; \ 799 if (GET_CODE (X) == PLUS \ 800 && ((MODE) == SImode || (MODE) == SFmode) \ 801 && GET_CODE (XEXP (X, 0)) == REG \ 802 && (REGNO (XEXP (X, 0)) == FRAME_POINTER_REGNUM \ 803 || REGNO (XEXP (X, 0)) == ARG_POINTER_REGNUM) \ 804 && GET_CODE (XEXP (X, 1)) == CONST_INT \ 805 && IN_RANGE (INTVAL (XEXP (X, 1)), -(1 << 9), (1 << 9) - 4)) \ 806 goto LABEL; \ 807 } \ 808 while (0) 809 #endif 810 811 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for 812 use as a base register. For hard registers, it should always accept those 813 which the hardware permits and reject the others. Whether the macro accepts 814 or rejects pseudo registers must be controlled by `REG_OK_STRICT' as 815 described above. This usually requires two variant definitions, of which 816 `REG_OK_STRICT' controls the one actually used. */ 817 #ifdef REG_OK_STRICT 818 #define REG_OK_FOR_BASE_P(X) (((unsigned) REGNO (X)) <= STACK_POINTER_REGNUM) 819 #else 820 #define REG_OK_FOR_BASE_P(X) 1 821 #endif 822 823 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for 824 use as an index register. 825 826 The difference between an index register and a base register is that the 827 index register may be scaled. If an address involves the sum of two 828 registers, neither one of them scaled, then either one may be labeled the 829 "base" and the other the "index"; but whichever labeling is used must fit 830 the machine's constraints of which registers may serve in each capacity. 831 The compiler will try both labelings, looking for one that is valid, and 832 will reload one or both registers only if neither labeling works. */ 833 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X) 834 835 /* A C expression that is nonzero if X is a legitimate constant for an 836 immediate operand on the target machine. You can assume that X satisfies 837 `CONSTANT_P', so you need not check this. In fact, `1' is a suitable 838 definition for this macro on machines where anything `CONSTANT_P' is valid. */ 839 #define LEGITIMATE_CONSTANT_P(X) 1 840 841 /*}}}*/ 842 /*{{{ Describing Relative Costs of Operations */ 843 844 /* Define this macro as a C expression which is nonzero if accessing less than 845 a word of memory (i.e. a `char' or a `short') is no faster than accessing a 846 word of memory, i.e., if such access require more than one instruction or if 847 there is no difference in cost between byte and (aligned) word loads. 848 849 When this macro is not defined, the compiler will access a field by finding 850 the smallest containing object; when it is defined, a fullword load will be 851 used if alignment permits. Unless bytes accesses are faster than word 852 accesses, using word accesses is preferable since it may eliminate 853 subsequent memory access if subsequent accesses occur to other fields in the 854 same word of the structure, but to different bytes. */ 855 #define SLOW_BYTE_ACCESS 1 856 857 /*}}}*/ 858 /*{{{ Dividing the output into sections. */ 859 860 /* A C expression whose value is a string containing the assembler operation 861 that should precede instructions and read-only data. Normally `".text"' is 862 right. */ 863 #define TEXT_SECTION_ASM_OP "\t.text" 864 865 /* A C expression whose value is a string containing the assembler operation to 866 identify the following data as writable initialized data. Normally 867 `".data"' is right. */ 868 #define DATA_SECTION_ASM_OP "\t.data" 869 870 /* If defined, a C expression whose value is a string containing the 871 assembler operation to identify the following data as 872 uninitialized global data. If not defined, and neither 873 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined, 874 uninitialized global data will be output in the data section if 875 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be 876 used. */ 877 #define BSS_SECTION_ASM_OP "\t.section .bss" 878 879 /*}}}*/ 880 /*{{{ The Overall Framework of an Assembler File. */ 881 882 /* A C string constant describing how to begin a comment in the target 883 assembler language. The compiler assumes that the comment will end at the 884 end of the line. */ 885 #define ASM_COMMENT_START ";" 886 887 /* A C string constant for text to be output before each `asm' statement or 888 group of consecutive ones. Normally this is `"#APP"', which is a comment 889 that has no effect on most assemblers but tells the GNU assembler that it 890 must check the lines that follow for all valid assembler constructs. */ 891 #define ASM_APP_ON "#APP\n" 892 893 /* A C string constant for text to be output after each `asm' statement or 894 group of consecutive ones. Normally this is `"#NO_APP"', which tells the 895 GNU assembler to resume making the time-saving assumptions that are valid 896 for ordinary compiler output. */ 897 #define ASM_APP_OFF "#NO_APP\n" 898 899 /*}}}*/ 900 /*{{{ Output and Generation of Labels. */ 901 902 /* Globalizing directive for a label. */ 903 #define GLOBAL_ASM_OP "\t.globl " 904 905 /*}}}*/ 906 /*{{{ Output of Assembler Instructions. */ 907 908 /* A C compound statement to output to stdio stream STREAM the assembler syntax 909 for an instruction operand X. X is an RTL expression. 910 911 CODE is a value that can be used to specify one of several ways of printing 912 the operand. It is used when identical operands must be printed differently 913 depending on the context. CODE comes from the `%' specification that was 914 used to request printing of the operand. If the specification was just 915 `%DIGIT' then CODE is 0; if the specification was `%LTR DIGIT' then CODE is 916 the ASCII code for LTR. 917 918 If X is a register, this macro should print the register's name. The names 919 can be found in an array `reg_names' whose type is `char *[]'. `reg_names' 920 is initialized from `REGISTER_NAMES'. 921 922 When the machine description has a specification `%PUNCT' (a `%' followed by 923 a punctuation character), this macro is called with a null pointer for X and 924 the punctuation character for CODE. */ 925 #define PRINT_OPERAND(STREAM, X, CODE) fr30_print_operand (STREAM, X, CODE) 926 927 /* A C expression which evaluates to true if CODE is a valid punctuation 928 character for use in the `PRINT_OPERAND' macro. If 929 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no punctuation 930 characters (except for the standard one, `%') are used in this way. */ 931 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) (CODE == '#') 932 933 /* A C compound statement to output to stdio stream STREAM the assembler syntax 934 for an instruction operand that is a memory reference whose address is X. X 935 is an RTL expression. */ 936 937 #define PRINT_OPERAND_ADDRESS(STREAM, X) fr30_print_operand_address (STREAM, X) 938 939 /* If defined, C string expressions to be used for the `%R', `%L', `%U', and 940 `%I' options of `asm_fprintf' (see `final.c'). These are useful when a 941 single `md' file must support multiple assembler formats. In that case, the 942 various `tm.h' files can define these macros differently. 943 944 USER_LABEL_PREFIX is defined in svr4.h. */ 945 #define REGISTER_PREFIX "%" 946 #define LOCAL_LABEL_PREFIX "." 947 #define USER_LABEL_PREFIX "" 948 #define IMMEDIATE_PREFIX "" 949 950 /*}}}*/ 951 /*{{{ Output of Dispatch Tables. */ 952 953 /* This macro should be provided on machines where the addresses in a dispatch 954 table are relative to the table's own address. 955 956 The definition should be a C statement to output to the stdio stream STREAM 957 an assembler pseudo-instruction to generate a difference between two labels. 958 VALUE and REL are the numbers of two internal labels. The definitions of 959 these labels are output using `(*targetm.asm_out.internal_label)', and they must be 960 printed in the same way here. For example, 961 962 fprintf (STREAM, "\t.word L%d-L%d\n", VALUE, REL) */ 963 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \ 964 fprintf (STREAM, "\t.word .L%d-.L%d\n", VALUE, REL) 965 966 /* This macro should be provided on machines where the addresses in a dispatch 967 table are absolute. 968 969 The definition should be a C statement to output to the stdio stream STREAM 970 an assembler pseudo-instruction to generate a reference to a label. VALUE 971 is the number of an internal label whose definition is output using 972 `(*targetm.asm_out.internal_label)'. For example, 973 974 fprintf (STREAM, "\t.word L%d\n", VALUE) */ 975 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \ 976 fprintf (STREAM, "\t.word .L%d\n", VALUE) 977 978 /*}}}*/ 979 /*{{{ Assembler Commands for Alignment. */ 980 981 /* A C statement to output to the stdio stream STREAM an assembler command to 982 advance the location counter to a multiple of 2 to the POWER bytes. POWER 983 will be a C expression of type `int'. */ 984 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \ 985 fprintf ((STREAM), "\t.p2align %d\n", (POWER)) 986 987 /*}}}*/ 988 /*{{{ Miscellaneous Parameters. */ 989 990 /* An alias for a machine mode name. This is the machine mode that elements of 991 a jump-table should have. */ 992 #define CASE_VECTOR_MODE SImode 993 994 /* The maximum number of bytes that a single instruction can move quickly from 995 memory to memory. */ 996 #define MOVE_MAX 8 997 998 /* A C expression which is nonzero if on this machine it is safe to "convert" 999 an integer of INPREC bits to one of OUTPREC bits (where OUTPREC is smaller 1000 than INPREC) by merely operating on it as if it had only OUTPREC bits. 1001 1002 On many machines, this expression can be 1. 1003 1004 When `TRULY_NOOP_TRUNCATION' returns 1 for a pair of sizes for modes for 1005 which `MODES_TIEABLE_P' is 0, suboptimal code can result. If this is the 1006 case, making `TRULY_NOOP_TRUNCATION' return 0 in such cases may improve 1007 things. */ 1008 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 1009 1010 /* An alias for the machine mode for pointers. On most machines, define this 1011 to be the integer mode corresponding to the width of a hardware pointer; 1012 `SImode' on 32-bit machine or `DImode' on 64-bit machines. On some machines 1013 you must define this to be one of the partial integer modes, such as 1014 `PSImode'. 1015 1016 The width of `Pmode' must be at least as large as the value of 1017 `POINTER_SIZE'. If it is not equal, you must define the macro 1018 `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to `Pmode'. */ 1019 #define Pmode SImode 1020 1021 /* An alias for the machine mode used for memory references to functions being 1022 called, in `call' RTL expressions. On most machines this should be 1023 `QImode'. */ 1024 #define FUNCTION_MODE QImode 1025 1026 /* If cross-compiling, don't require stdio.h etc to build libgcc.a. */ 1027 #if defined CROSS_DIRECTORY_STRUCTURE && ! defined inhibit_libc 1028 #define inhibit_libc 1029 #endif 1030 1031 /*}}}*/ 1032 1033 /* Local Variables: */ 1034 /* folded-file: t */ 1035 /* End: */ 1036