1 /* Definitions of target machine for GNU compiler. 2 Renesas H8/300 (generic) 3 Copyright (C) 1992-2020 Free Software Foundation, Inc. 4 Contributed by Steve Chamberlain (sac@cygnus.com), 5 Jim Wilson (wilson@cygnus.com), and Doug Evans (dje@cygnus.com). 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 #ifndef GCC_H8300_H 24 #define GCC_H8300_H 25 26 /* Which CPU to compile for. 27 We use int for CPU_TYPE to avoid lots of casts. */ 28 #if 0 /* defined in insn-attr.h, here for documentation */ 29 enum attr_cpu { CPU_H8300, CPU_H8300H }; 30 #endif 31 extern int cpu_type; 32 33 /* Various globals defined in h8300.c. */ 34 35 extern const char *h8_push_op, *h8_pop_op, *h8_mov_op; 36 extern const char * const *h8_reg_names; 37 38 /* Target CPU builtins. */ 39 #define TARGET_CPU_CPP_BUILTINS() \ 40 do \ 41 { \ 42 if (TARGET_H8300SX) \ 43 { \ 44 builtin_define ("__H8300SX__"); \ 45 if (TARGET_NORMAL_MODE) \ 46 { \ 47 builtin_define ("__NORMAL_MODE__"); \ 48 } \ 49 } \ 50 else if (TARGET_H8300S) \ 51 { \ 52 builtin_define ("__H8300S__"); \ 53 builtin_assert ("cpu=h8300s"); \ 54 builtin_assert ("machine=h8300s"); \ 55 if (TARGET_NORMAL_MODE) \ 56 { \ 57 builtin_define ("__NORMAL_MODE__"); \ 58 } \ 59 } \ 60 else if (TARGET_H8300H) \ 61 { \ 62 builtin_define ("__H8300H__"); \ 63 builtin_assert ("cpu=h8300h"); \ 64 builtin_assert ("machine=h8300h"); \ 65 if (TARGET_NORMAL_MODE) \ 66 { \ 67 builtin_define ("__NORMAL_MODE__"); \ 68 } \ 69 } \ 70 else \ 71 { \ 72 builtin_define ("__H8300__"); \ 73 builtin_assert ("cpu=h8300"); \ 74 builtin_assert ("machine=h8300"); \ 75 } \ 76 } \ 77 while (0) 78 79 #define LINK_SPEC "%{mh:%{mn:-m h8300hn}} %{mh:%{!mn:-m h8300h}} %{ms:%{mn:-m h8300sn}} %{ms:%{!mn:-m h8300s}}" 80 81 #define LIB_SPEC "%{mrelax:-relax} %{g:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}" 82 83 /* Macros used in the machine description to test the flags. */ 84 85 /* Select between the H8/300 and H8/300H CPUs. */ 86 #define TARGET_H8300 (! TARGET_H8300H && ! TARGET_H8300S) 87 #define TARGET_H8300S (TARGET_H8300S_1 || TARGET_H8300SX) 88 /* Some multiply instructions are not available in all H8SX variants. 89 Use this macro instead of TARGET_H8300SX to indicate this, even 90 though we don't actually generate different code for now. */ 91 #define TARGET_H8300SXMUL TARGET_H8300SX 92 93 #ifdef IN_LIBGCC2 94 #undef TARGET_H8300H 95 #undef TARGET_H8300S 96 #undef TARGET_NORMAL_MODE 97 /* If compiling libgcc2, make these compile time constants based on what 98 flags are we actually compiling with. */ 99 #ifdef __H8300H__ 100 #define TARGET_H8300H 1 101 #else 102 #define TARGET_H8300H 0 103 #endif 104 #ifdef __H8300S__ 105 #define TARGET_H8300S 1 106 #else 107 #define TARGET_H8300S 0 108 #endif 109 #ifdef __NORMAL_MODE__ 110 #define TARGET_NORMAL_MODE 1 111 #else 112 #define TARGET_NORMAL_MODE 0 113 #endif 114 #endif /* !IN_LIBGCC2 */ 115 116 /* Default target_flags if no switches specified. */ 117 118 #ifndef TARGET_DEFAULT 119 #define TARGET_DEFAULT (MASK_QUICKCALL) 120 #endif 121 122 /* We want dwarf2 info available to gdb. */ 123 #define DWARF2_DEBUGGING_INFO 1 124 125 /* The return address is pushed on the stack. */ 126 #define INCOMING_RETURN_ADDR_RTX gen_rtx_MEM (Pmode, gen_rtx_REG (Pmode, STACK_POINTER_REGNUM)) 127 #define INCOMING_FRAME_SP_OFFSET (POINTER_SIZE / 8) 128 129 #define DWARF_CIE_DATA_ALIGNMENT 2 130 131 /* Define this if addresses of constant functions 132 shouldn't be put through pseudo regs where they can be cse'd. 133 Desirable on machines where ordinary constants are expensive 134 but a CALL with constant address is cheap. 135 136 Calls through a register are cheaper than calls to named 137 functions; however, the register pressure this causes makes 138 CSEing of function addresses generally a lose. */ 139 #define NO_FUNCTION_CSE 1 140 141 /* Target machine storage layout */ 142 143 /* Define this if most significant bit is lowest numbered 144 in instructions that operate on numbered bit-fields. 145 This is not true on the H8/300. */ 146 #define BITS_BIG_ENDIAN 0 147 148 /* Define this if most significant byte of a word is the lowest numbered. */ 149 /* That is true on the H8/300. */ 150 #define BYTES_BIG_ENDIAN 1 151 152 /* Define this if most significant word of a multiword number is lowest 153 numbered. */ 154 #define WORDS_BIG_ENDIAN 1 155 156 #define MAX_BITS_PER_WORD 32 157 158 /* Width of a word, in units (bytes). */ 159 #define UNITS_PER_WORD (TARGET_H8300H || TARGET_H8300S ? 4 : 2) 160 #define MIN_UNITS_PER_WORD 2 161 162 #define SHORT_TYPE_SIZE 16 163 #define INT_TYPE_SIZE (TARGET_INT32 ? 32 : 16) 164 #define LONG_TYPE_SIZE 32 165 #define LONG_LONG_TYPE_SIZE 64 166 #define FLOAT_TYPE_SIZE 32 167 #define DOUBLE_TYPE_SIZE 32 168 #define LONG_DOUBLE_TYPE_SIZE DOUBLE_TYPE_SIZE 169 170 #define MAX_FIXED_MODE_SIZE 32 171 172 /* Allocation boundary (in *bits*) for storing arguments in argument list. */ 173 #define PARM_BOUNDARY (TARGET_H8300H || TARGET_H8300S ? 32 : 16) 174 175 /* Allocation boundary (in *bits*) for the code of a function. */ 176 #define FUNCTION_BOUNDARY 16 177 178 /* Alignment of field after `int : 0' in a structure. */ 179 /* One can argue this should be 32 for -mint32, but since 32-bit ints only 180 need 16-bit alignment, this is left as is so that -mint32 doesn't change 181 structure layouts. */ 182 #define EMPTY_FIELD_BOUNDARY 16 183 184 /* No data type wants to be aligned rounder than this. 185 32-bit values are aligned as such on the H8/300H and H8S for speed. */ 186 #define BIGGEST_ALIGNMENT \ 187 (((TARGET_H8300H || TARGET_H8300S) && ! TARGET_ALIGN_300) ? 32 : 16) 188 189 /* The stack goes in 16/32 bit lumps. */ 190 #define STACK_BOUNDARY (TARGET_H8300 ? 16 : 32) 191 192 /* Define this if move instructions will actually fail to work 193 when given unaligned data. */ 194 /* On the H8/300, longs can be aligned on halfword boundaries, but not 195 byte boundaries. */ 196 #define STRICT_ALIGNMENT 1 197 198 /* Standard register usage. */ 199 200 /* Number of actual hardware registers. 201 The hardware registers are assigned numbers for the compiler 202 from 0 to just below FIRST_PSEUDO_REGISTER. 203 204 All registers that the compiler knows about must be given numbers, 205 even those that are not normally considered general registers. 206 207 Reg 9 does not correspond to any hardware register, but instead 208 appears in the RTL as an argument pointer prior to reload, and is 209 eliminated during reloading in favor of either the stack or frame 210 pointer. */ 211 212 #define FIRST_PSEUDO_REGISTER 12 213 214 /* 1 for registers that have pervasive standard uses 215 and are not available for the register allocator. */ 216 217 #define FIXED_REGISTERS \ 218 /* r0 r1 r2 r3 r4 r5 r6 r7 mac ap rap fp */ \ 219 { 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1 } 220 221 /* 1 for registers not available across function calls. 222 These must include the FIXED_REGISTERS and also any 223 registers that can be used without being saved. 224 The latter must include the registers where values are returned 225 and the register where structure-value addresses are passed. 226 Aside from that, you can include as many other registers as you 227 like. 228 229 H8 destroys r0,r1,r2,r3. */ 230 231 #define CALL_USED_REGISTERS \ 232 /* r0 r1 r2 r3 r4 r5 r6 r7 mac ap rap fp */ \ 233 { 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1 } 234 235 #define REG_ALLOC_ORDER \ 236 /* r0 r1 r2 r3 r4 r5 r6 r7 mac ap rap fp */ \ 237 { 2, 3, 0, 1, 4, 5, 6, 8, 7, 9, 10, 11 } 238 239 /* A C expression that is nonzero if hard register NEW_REG can be 240 considered for use as a rename register for OLD_REG register */ 241 242 #define HARD_REGNO_RENAME_OK(OLD_REG, NEW_REG) \ 243 h8300_hard_regno_rename_ok (OLD_REG, NEW_REG) 244 245 /* Specify the registers used for certain standard purposes. 246 The values of these macros are register numbers. */ 247 248 /* H8/300 pc is not overloaded on a register. */ 249 250 /*#define PC_REGNUM 15*/ 251 252 /* Register to use for pushing function arguments. */ 253 #define STACK_POINTER_REGNUM SP_REG 254 255 /* Base register for access to local variables of the function. */ 256 #define HARD_FRAME_POINTER_REGNUM HFP_REG 257 258 /* Base register for access to local variables of the function. */ 259 #define FRAME_POINTER_REGNUM FP_REG 260 261 /* Base register for access to arguments of the function. */ 262 #define ARG_POINTER_REGNUM AP_REG 263 264 /* Register in which static-chain is passed to a function. */ 265 #define STATIC_CHAIN_REGNUM SC_REG 266 267 /* Fake register that holds the address on the stack of the 268 current function's return address. */ 269 #define RETURN_ADDRESS_POINTER_REGNUM RAP_REG 270 271 /* A C expression whose value is RTL representing the value of the return 272 address for the frame COUNT steps up from the current frame. 273 FRAMEADDR is already the frame pointer of the COUNT frame, assuming 274 a stack layout with the frame pointer as the first saved register. */ 275 #define RETURN_ADDR_RTX(COUNT, FRAME) h8300_return_addr_rtx ((COUNT), (FRAME)) 276 277 /* Define the classes of registers for register constraints in the 278 machine description. Also define ranges of constants. 279 280 One of the classes must always be named ALL_REGS and include all hard regs. 281 If there is more than one class, another class must be named NO_REGS 282 and contain no registers. 283 284 The name GENERAL_REGS must be the name of a class (or an alias for 285 another name such as ALL_REGS). This is the class of registers 286 that is allowed by "g" or "r" in a register constraint. 287 Also, registers outside this class are allocated only when 288 instructions express preferences for them. 289 290 The classes must be numbered in nondecreasing order; that is, 291 a larger-numbered class must never be contained completely 292 in a smaller-numbered class. 293 294 For any two classes, it is very desirable that there be another 295 class that represents their union. */ 296 297 enum reg_class { 298 NO_REGS, COUNTER_REGS, SOURCE_REGS, DESTINATION_REGS, 299 GENERAL_REGS, MAC_REGS, ALL_REGS, LIM_REG_CLASSES 300 }; 301 302 #define N_REG_CLASSES ((int) LIM_REG_CLASSES) 303 304 /* Give names of register classes as strings for dump file. */ 305 306 #define REG_CLASS_NAMES \ 307 { "NO_REGS", "COUNTER_REGS", "SOURCE_REGS", "DESTINATION_REGS", \ 308 "GENERAL_REGS", "MAC_REGS", "ALL_REGS", "LIM_REGS" } 309 310 /* Define which registers fit in which classes. 311 This is an initializer for a vector of HARD_REG_SET 312 of length N_REG_CLASSES. */ 313 314 #define REG_CLASS_CONTENTS \ 315 { {0}, /* No regs */ \ 316 {0x010}, /* COUNTER_REGS */ \ 317 {0x020}, /* SOURCE_REGS */ \ 318 {0x040}, /* DESTINATION_REGS */ \ 319 {0xeff}, /* GENERAL_REGS */ \ 320 {0x100}, /* MAC_REGS */ \ 321 {0xfff}, /* ALL_REGS */ \ 322 } 323 324 /* The same information, inverted: 325 Return the class number of the smallest class containing 326 reg number REGNO. This could be a conditional expression 327 or could index an array. */ 328 329 #define REGNO_REG_CLASS(REGNO) \ 330 ((REGNO) == MAC_REG ? MAC_REGS \ 331 : (REGNO) == COUNTER_REG ? COUNTER_REGS \ 332 : (REGNO) == SOURCE_REG ? SOURCE_REGS \ 333 : (REGNO) == DESTINATION_REG ? DESTINATION_REGS \ 334 : GENERAL_REGS) 335 336 /* The class value for index registers, and the one for base regs. */ 337 338 #define INDEX_REG_CLASS (TARGET_H8300SX ? GENERAL_REGS : NO_REGS) 339 #define BASE_REG_CLASS GENERAL_REGS 340 341 /* Stack layout; function entry, exit and calling. */ 342 343 /* Define this if pushing a word on the stack 344 makes the stack pointer a smaller address. */ 345 346 #define STACK_GROWS_DOWNWARD 1 347 348 /* Define this to nonzero if the nominal address of the stack frame 349 is at the high-address end of the local variables; 350 that is, each additional local variable allocated 351 goes at a more negative offset in the frame. */ 352 353 #define FRAME_GROWS_DOWNWARD 1 354 355 #define PUSH_ROUNDING(BYTES) h8300_push_rounding (BYTES) 356 357 /* Offset of first parameter from the argument pointer register value. */ 358 /* Is equal to the size of the saved fp + pc, even if an fp isn't 359 saved since the value is used before we know. */ 360 361 #define FIRST_PARM_OFFSET(FNDECL) 0 362 363 /* Definitions for register eliminations. 364 365 This is an array of structures. Each structure initializes one pair 366 of eliminable registers. The "from" register number is given first, 367 followed by "to". Eliminations of the same "from" register are listed 368 in order of preference. 369 370 We have three registers that can be eliminated on the h8300. 371 First, the frame pointer register can often be eliminated in favor 372 of the stack pointer register. Secondly, the argument pointer 373 register and the return address pointer register are always 374 eliminated; they are replaced with either the stack or frame 375 pointer. */ 376 377 #define ELIMINABLE_REGS \ 378 {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ 379 { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \ 380 { RETURN_ADDRESS_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ 381 { RETURN_ADDRESS_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \ 382 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ 383 { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}} 384 385 /* Define the offset between two registers, one to be eliminated, and the other 386 its replacement, at the start of a routine. */ 387 388 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ 389 ((OFFSET) = h8300_initial_elimination_offset ((FROM), (TO))) 390 391 /* Define this if PCC uses the nonreentrant convention for returning 392 structure and union values. */ 393 394 /*#define PCC_STATIC_STRUCT_RETURN*/ 395 396 /* 1 if N is a possible register number for function argument passing. 397 On the H8, no registers are used in this way. */ 398 399 #define FUNCTION_ARG_REGNO_P(N) (TARGET_QUICKCALL ? N < 3 : 0) 400 401 /* When this hook returns true for MODE, the compiler allows 402 registers explicitly used in the rtl to be used as spill registers 403 but prevents the compiler from extending the lifetime of these 404 registers. */ 405 #define TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P hook_bool_mode_true 406 407 /* Define a data type for recording info about an argument list 408 during the scan of that argument list. This data type should 409 hold all necessary information about the function itself 410 and about the args processed so far, enough to enable macros 411 such as FUNCTION_ARG to determine where the next arg should go. 412 413 On the H8/300, this is a two item struct, the first is the number 414 of bytes scanned so far and the second is the rtx of the called 415 library function if any. */ 416 417 #define CUMULATIVE_ARGS struct cum_arg 418 struct cum_arg 419 { 420 int nbytes; 421 rtx libcall; 422 }; 423 424 /* Initialize a variable CUM of type CUMULATIVE_ARGS 425 for a call to a function whose data type is FNTYPE. 426 For a library call, FNTYPE is 0. 427 428 On the H8/300, the offset starts at 0. */ 429 430 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \ 431 ((CUM).nbytes = 0, (CUM).libcall = LIBNAME) 432 433 /* Output assembler code to FILE to increment profiler label # LABELNO 434 for profiling a function entry. */ 435 436 #define FUNCTION_PROFILER(FILE, LABELNO) \ 437 fprintf (FILE, "\t%s\t#.LP%d,%s\n\tjsr @mcount\n", \ 438 h8_mov_op, (LABELNO), h8_reg_names[0]); 439 440 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, 441 the stack pointer does not matter. The value is tested only in 442 functions that have frame pointers. 443 No definition is equivalent to always zero. */ 444 445 #define EXIT_IGNORE_STACK 0 446 447 /* Length in units of the trampoline for entering a nested function. */ 448 449 #define TRAMPOLINE_SIZE ((Pmode == HImode) ? 8 : 12) 450 451 /* Addressing modes, and classification of registers for them. */ 452 453 #define HAVE_POST_INCREMENT 1 454 #define HAVE_PRE_DECREMENT 1 455 #define HAVE_POST_DECREMENT TARGET_H8300SX 456 #define HAVE_PRE_INCREMENT TARGET_H8300SX 457 458 /* Macros to check register numbers against specific register classes. */ 459 460 /* These assume that REGNO is a hard or pseudo reg number. 461 They give nonzero only if REGNO is a hard reg of the suitable class 462 or a pseudo reg currently allocated to a suitable hard reg. 463 Since they use reg_renumber, they are safe only once reg_renumber 464 has been allocated, which happens in reginfo.c during register 465 allocation. */ 466 467 #define REGNO_OK_FOR_INDEX_P(regno) 0 468 469 #define REGNO_OK_FOR_BASE_P(regno) \ 470 (((regno) < FIRST_PSEUDO_REGISTER && regno != MAC_REG) \ 471 || reg_renumber[regno] >= 0) 472 473 /* Maximum number of registers that can appear in a valid memory address. */ 474 475 #define MAX_REGS_PER_ADDRESS 1 476 477 /* 1 if X is an rtx for a constant that is a valid address. */ 478 479 #define CONSTANT_ADDRESS_P(X) \ 480 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \ 481 || (GET_CODE (X) == CONST_INT \ 482 /* We handle signed and unsigned offsets here. */ \ 483 && INTVAL (X) > (TARGET_H8300 ? -0x10000 : -0x1000000) \ 484 && INTVAL (X) < (TARGET_H8300 ? 0x10000 : 0x1000000)) \ 485 || (GET_CODE (X) == HIGH || GET_CODE (X) == CONST)) 486 487 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx 488 and check its validity for a certain class. 489 We have two alternate definitions for each of them. 490 The usual definition accepts all pseudo regs; the other rejects 491 them unless they have been allocated suitable hard regs. 492 The symbol REG_OK_STRICT causes the latter definition to be used. 493 494 Most source files want to accept pseudo regs in the hope that 495 they will get allocated to the class that the insn wants them to be in. 496 Source files for reload pass need to be strict. 497 After reload, it makes no difference, since pseudo regs have 498 been eliminated by then. */ 499 500 /* Non-strict versions. */ 501 #define REG_OK_FOR_INDEX_NONSTRICT_P(X) 0 502 /* Don't use REGNO_OK_FOR_BASE_P here because it uses reg_renumber. */ 503 #define REG_OK_FOR_BASE_NONSTRICT_P(X) \ 504 (REGNO (X) >= FIRST_PSEUDO_REGISTER || REGNO (X) != MAC_REG) 505 506 /* Strict versions. */ 507 #define REG_OK_FOR_INDEX_STRICT_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X)) 508 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) 509 510 #ifndef REG_OK_STRICT 511 512 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_INDEX_NONSTRICT_P (X) 513 #define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NONSTRICT_P (X) 514 515 #else 516 517 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_INDEX_STRICT_P (X) 518 #define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P (X) 519 520 #endif 521 522 523 /* Specify the machine mode that this machine uses 524 for the index in the tablejump instruction. */ 525 #define CASE_VECTOR_MODE Pmode 526 527 /* Define this as 1 if `char' should by default be signed; else as 0. 528 529 On the H8/300, sign extension is expensive, so we'll say that chars 530 are unsigned. */ 531 #define DEFAULT_SIGNED_CHAR 0 532 533 /* Max number of bytes we can move from memory to memory 534 in one reasonably fast instruction. */ 535 #define MOVE_MAX (TARGET_H8300H || TARGET_H8300S ? 4 : 2) 536 #define MAX_MOVE_MAX 4 537 538 /* Nonzero if access to memory by bytes is slow and undesirable. */ 539 #define SLOW_BYTE_ACCESS TARGET_SLOWBYTE 540 541 /* Define if shifts truncate the shift count 542 which implies one can omit a sign-extension or zero-extension 543 of a shift count. */ 544 /* #define SHIFT_COUNT_TRUNCATED */ 545 546 /* Specify the machine mode that pointers have. 547 After generation of rtl, the compiler makes no further distinction 548 between pointers and any other objects of this machine mode. */ 549 #define Pmode \ 550 ((TARGET_H8300H || TARGET_H8300S) && !TARGET_NORMAL_MODE ? SImode : HImode) 551 552 /* ANSI C types. 553 We use longs for the H8/300H and the H8S because ints can be 16 or 32. 554 GCC requires SIZE_TYPE to be the same size as pointers. */ 555 #define SIZE_TYPE \ 556 (TARGET_H8300 || TARGET_NORMAL_MODE ? TARGET_INT32 ? "short unsigned int" : "unsigned int" : "long unsigned int") 557 #define PTRDIFF_TYPE \ 558 (TARGET_H8300 || TARGET_NORMAL_MODE ? TARGET_INT32 ? "short int" : "int" : "long int") 559 560 #define POINTER_SIZE \ 561 ((TARGET_H8300H || TARGET_H8300S) && !TARGET_NORMAL_MODE ? 32 : 16) 562 563 #define WCHAR_TYPE "short unsigned int" 564 #define WCHAR_TYPE_SIZE 16 565 566 /* A function address in a call instruction 567 is a byte address (for indexing purposes) 568 so give the MEM rtx a byte's mode. */ 569 #define FUNCTION_MODE QImode 570 571 /* Return the length of JUMP's delay slot insn (0 if it has none). 572 If JUMP is a delayed branch, NEXT_INSN (PREV_INSN (JUMP)) will 573 be the containing SEQUENCE, not JUMP itself. */ 574 #define DELAY_SLOT_LENGTH(JUMP) \ 575 (NEXT_INSN (PREV_INSN (JUMP)) == JUMP ? 0 : 2) 576 577 #define BRANCH_COST(speed_p, predictable_p) 0 578 579 /* Tell final.c how to eliminate redundant test instructions. */ 580 581 /* Here we define machine-dependent flags and fields in cc_status 582 (see `conditions.h'). No extra ones are needed for the h8300. */ 583 584 /* Store in cc_status the expressions 585 that the condition codes will describe 586 after execution of an instruction whose pattern is EXP. 587 Do not alter them if the instruction would not alter the cc's. */ 588 589 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc (EXP, INSN) 590 591 /* The add insns don't set overflow in a usable way. */ 592 #define CC_OVERFLOW_UNUSABLE 01000 593 /* The mov,and,or,xor insns don't set carry. That's OK though as the 594 Z bit is all we need when doing unsigned comparisons on the result of 595 these insns (since they're always with 0). However, conditions.h has 596 CC_NO_OVERFLOW defined for this purpose. Rename it to something more 597 understandable. */ 598 #define CC_NO_CARRY CC_NO_OVERFLOW 599 600 /* Control the assembler format that we output. */ 601 602 /* Output to assembler file text saying following lines 603 may contain character constants, extra white space, comments, etc. */ 604 605 #define ASM_APP_ON "; #APP\n" 606 607 /* Output to assembler file text saying following lines 608 no longer contain unusual constructs. */ 609 610 #define ASM_APP_OFF "; #NO_APP\n" 611 612 #define FILE_ASM_OP "\t.file\n" 613 614 /* The assembler op to get a word, 2 bytes for the H8/300, 4 for H8/300H. */ 615 #define ASM_WORD_OP \ 616 (TARGET_H8300 || TARGET_NORMAL_MODE ? "\t.word\t" : "\t.long\t") 617 618 #define TEXT_SECTION_ASM_OP "\t.section .text" 619 #define DATA_SECTION_ASM_OP "\t.section .data" 620 #define BSS_SECTION_ASM_OP "\t.section .bss" 621 622 #undef DO_GLOBAL_CTORS_BODY 623 #define DO_GLOBAL_CTORS_BODY \ 624 { \ 625 extern func_ptr __ctors[]; \ 626 extern func_ptr __ctors_end[]; \ 627 func_ptr *p; \ 628 for (p = __ctors_end; p > __ctors; ) \ 629 { \ 630 (*--p)(); \ 631 } \ 632 } 633 634 #undef DO_GLOBAL_DTORS_BODY 635 #define DO_GLOBAL_DTORS_BODY \ 636 { \ 637 extern func_ptr __dtors[]; \ 638 extern func_ptr __dtors_end[]; \ 639 func_ptr *p; \ 640 for (p = __dtors; p < __dtors_end; p++) \ 641 { \ 642 (*p)(); \ 643 } \ 644 } 645 646 /* How to refer to registers in assembler output. 647 This sequence is indexed by compiler's hard-register-number (see above). */ 648 649 #define REGISTER_NAMES \ 650 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "sp", "mac", "ap", "rap", "fp" } 651 652 #define ADDITIONAL_REGISTER_NAMES \ 653 { {"er0", 0}, {"er1", 1}, {"er2", 2}, {"er3", 3}, {"er4", 4}, \ 654 {"er5", 5}, {"er6", 6}, {"er7", 7}, {"r7", 7} } 655 656 /* Globalizing directive for a label. */ 657 #define GLOBAL_ASM_OP "\t.global " 658 659 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 660 ASM_OUTPUT_LABEL (FILE, NAME) 661 662 /* The prefix to add to user-visible assembler symbols. */ 663 664 #define USER_LABEL_PREFIX "_" 665 666 /* This is how to store into the string LABEL 667 the symbol_ref name of an internal numbered label where 668 PREFIX is the class of label and NUM is the number within the class. 669 This is suitable for output with `assemble_name'. 670 671 N.B.: The h8300.md branch_true and branch_false patterns also know 672 how to generate internal labels. */ 673 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \ 674 sprintf (LABEL, "*.%s%lu", PREFIX, (unsigned long)(NUM)) 675 676 /* This is how to output an insn to push a register on the stack. 677 It need not be very fast code. */ 678 679 #define ASM_OUTPUT_REG_PUSH(FILE, REGNO) \ 680 fprintf (FILE, "\t%s\t%s\n", h8_push_op, h8_reg_names[REGNO]) 681 682 /* This is how to output an insn to pop a register from the stack. 683 It need not be very fast code. */ 684 685 #define ASM_OUTPUT_REG_POP(FILE, REGNO) \ 686 fprintf (FILE, "\t%s\t%s\n", h8_pop_op, h8_reg_names[REGNO]) 687 688 /* This is how to output an element of a case-vector that is absolute. */ 689 690 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ 691 fprintf (FILE, "%s.L%d\n", ASM_WORD_OP, VALUE) 692 693 /* This is how to output an element of a case-vector that is relative. */ 694 695 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ 696 fprintf (FILE, "%s.L%d-.L%d\n", ASM_WORD_OP, VALUE, REL) 697 698 /* This is how to output an assembler line 699 that says to advance the location counter 700 to a multiple of 2**LOG bytes. */ 701 702 #define ASM_OUTPUT_ALIGN(FILE, LOG) \ 703 if ((LOG) != 0) \ 704 fprintf (FILE, "\t.align %d\n", (LOG)) 705 706 #define ASM_OUTPUT_SKIP(FILE, SIZE) \ 707 fprintf (FILE, "\t.space %d\n", (int)(SIZE)) 708 709 /* This says how to output an assembler line 710 to define a global common symbol. */ 711 712 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ 713 ( fputs ("\t.comm ", (FILE)), \ 714 assemble_name ((FILE), (NAME)), \ 715 fprintf ((FILE), ",%lu\n", (unsigned long)(SIZE))) 716 717 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 718 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) 719 720 /* This says how to output an assembler line 721 to define a local common symbol. */ 722 723 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ 724 ( fputs ("\t.lcomm ", (FILE)), \ 725 assemble_name ((FILE), (NAME)), \ 726 fprintf ((FILE), ",%d\n", (int)(SIZE))) 727 728 #define ASM_PN_FORMAT "%s___%lu" 729 730 /* H8300 specific pragmas. */ 731 #define REGISTER_TARGET_PRAGMAS() \ 732 do \ 733 { \ 734 c_register_pragma (0, "saveall", h8300_pr_saveall); \ 735 c_register_pragma (0, "interrupt", h8300_pr_interrupt); \ 736 } \ 737 while (0) 738 739 #define FINAL_PRESCAN_INSN(insn, operand, nop) \ 740 final_prescan_insn (insn, operand, nop) 741 742 extern int h8300_move_ratio; 743 #define MOVE_RATIO(speed) h8300_move_ratio 744 745 /* Machine-specific symbol_ref flags. */ 746 #define SYMBOL_FLAG_FUNCVEC_FUNCTION (SYMBOL_FLAG_MACH_DEP << 0) 747 #define SYMBOL_FLAG_EIGHTBIT_DATA (SYMBOL_FLAG_MACH_DEP << 1) 748 #define SYMBOL_FLAG_TINY_DATA (SYMBOL_FLAG_MACH_DEP << 2) 749 750 #endif /* ! GCC_H8300_H */ 751