1 /* Definitions of target machine for GNU compiler. Matsushita MN10300 series
2 Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
3 Contributed by Jeff Law (law@cygnus.com).
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
31 /* Names to predefine in the preprocessor for this target machine. */
33 #define CPP_PREDEFINES "-D__mn10300__ -D__MN10300__"
35 #define CPP_SPEC "%{mam33:-D__AM33__}"
37 /* Run-time compilation parameters selecting different hardware subsets. */
39 extern int target_flags;
41 /* Macros used in the machine description to test the flags. */
43 /* Macro to define tables used to set the flags.
44 This is a list in braces of pairs in braces,
45 each pair being { "NAME", VALUE }
46 where VALUE is the bits to set or minus the bits to clear.
47 An empty string NAME is used to identify the default VALUE. */
49 /* Generate code to work around mul/mulq bugs on the mn10300. */
50 #define TARGET_MULT_BUG (target_flags & 0x1)
52 /* Generate code for the AM33 processor. */
53 #define TARGET_AM33 (target_flags & 0x2)
55 #define TARGET_SWITCHES \
56 {{ "mult-bug", 0x1, "Work around hardware multiply bug"}, \
57 { "no-mult-bug", -0x1, "Do not work around hardware multiply bug"},\
61 { "", TARGET_DEFAULT, NULL}}
63 #ifndef TARGET_DEFAULT
64 #define TARGET_DEFAULT 0x1
67 /* Print subsidiary information on the compiler version in use. */
69 #define TARGET_VERSION fprintf (stderr, " (MN10300)");
72 /* Target machine storage layout */
74 /* Define this if most significant bit is lowest numbered
75 in instructions that operate on numbered bit-fields.
76 This is not true on the Matsushita MN1003. */
77 #define BITS_BIG_ENDIAN 0
79 /* Define this if most significant byte of a word is the lowest numbered. */
80 /* This is not true on the Matsushita MN10300. */
81 #define BYTES_BIG_ENDIAN 0
83 /* Define this if most significant word of a multiword number is lowest
85 This is not true on the Matsushita MN10300. */
86 #define WORDS_BIG_ENDIAN 0
88 /* Number of bits in an addressable storage unit */
89 #define BITS_PER_UNIT 8
91 /* Width in bits of a "word", which is the contents of a machine register.
92 Note that this is not necessarily the width of data type `int';
93 if using 16-bit ints on a 68000, this would still be 32.
94 But on a machine with 16-bit registers, this would be 16. */
95 #define BITS_PER_WORD 32
97 /* Width of a word, in units (bytes). */
98 #define UNITS_PER_WORD 4
100 /* Width in bits of a pointer.
101 See also the macro `Pmode' defined below. */
102 #define POINTER_SIZE 32
104 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
105 #define PARM_BOUNDARY 32
107 /* The stack goes in 32 bit lumps. */
108 #define STACK_BOUNDARY 32
110 /* Allocation boundary (in *bits*) for the code of a function.
111 8 is the minimum boundary; it's unclear if bigger alignments
112 would improve performance. */
113 #define FUNCTION_BOUNDARY 8
115 /* No data type wants to be aligned rounder than this. */
116 #define BIGGEST_ALIGNMENT 32
118 /* Alignment of field after `int : 0' in a structure. */
119 #define EMPTY_FIELD_BOUNDARY 32
121 /* Define this if move instructions will actually fail to work
122 when given unaligned data. */
123 #define STRICT_ALIGNMENT 1
125 /* Define this as 1 if `char' should by default be signed; else as 0. */
126 #define DEFAULT_SIGNED_CHAR 0
128 /* Define results of standard character escape sequences. */
129 #define TARGET_BELL 007
130 #define TARGET_BS 010
131 #define TARGET_TAB 011
132 #define TARGET_NEWLINE 012
133 #define TARGET_VT 013
134 #define TARGET_FF 014
135 #define TARGET_CR 015
137 /* Standard register usage. */
139 /* Number of actual hardware registers.
140 The hardware registers are assigned numbers for the compiler
141 from 0 to just below FIRST_PSEUDO_REGISTER.
143 All registers that the compiler knows about must be given numbers,
144 even those that are not normally considered general registers. */
146 #define FIRST_PSEUDO_REGISTER 18
148 /* 1 for registers that have pervasive standard uses
149 and are not available for the register allocator. */
151 #define FIXED_REGISTERS \
152 { 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0}
154 /* 1 for registers not available across function calls.
155 These must include the FIXED_REGISTERS and also any
156 registers that can be used without being saved.
157 The latter must include the registers where values are returned
158 and the register where structure-value addresses are passed.
159 Aside from that, you can include as many other registers as you
162 #define CALL_USED_REGISTERS \
163 { 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0}
165 #define REG_ALLOC_ORDER \
166 { 0, 1, 4, 5, 2, 3, 6, 7, 10, 11, 12, 13, 14, 15, 16, 17, 8, 9}
168 #define CONDITIONAL_REGISTER_USAGE \
172 for (i = 10; i < 18; i++) \
173 fixed_regs[i] = call_used_regs[i] = 1; \
177 /* Return number of consecutive hard regs needed starting at reg REGNO
178 to hold something of mode MODE.
180 This is ordinarily the length in words of a value of mode MODE
181 but can be less for certain modes in special long registers. */
183 #define HARD_REGNO_NREGS(REGNO, MODE) \
184 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
186 /* Value is 1 if hard register REGNO can hold a value of machine-mode
189 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
190 ((REGNO_REG_CLASS (REGNO) == DATA_REGS \
191 || (TARGET_AM33 && REGNO_REG_CLASS (REGNO) == ADDRESS_REGS) \
192 || REGNO_REG_CLASS (REGNO) == EXTENDED_REGS) \
193 ? ((REGNO) & 1) == 0 || GET_MODE_SIZE (MODE) <= 4 \
194 : ((REGNO) & 1) == 0 || GET_MODE_SIZE (MODE) == 4)
196 /* Value is 1 if it is a good idea to tie two pseudo registers
197 when one has mode MODE1 and one has mode MODE2.
198 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
199 for any hard reg, then this must be 0 for correct output. */
200 #define MODES_TIEABLE_P(MODE1, MODE2) \
203 || (GET_MODE_SIZE (MODE1) <= 4 && GET_MODE_SIZE (MODE2) <= 4))
205 /* 4 data, and effectively 3 address registers is small as far as I'm
207 #define SMALL_REGISTER_CLASSES 1
209 /* Define the classes of registers for register constraints in the
210 machine description. Also define ranges of constants.
212 One of the classes must always be named ALL_REGS and include all hard regs.
213 If there is more than one class, another class must be named NO_REGS
214 and contain no registers.
216 The name GENERAL_REGS must be the name of a class (or an alias for
217 another name such as ALL_REGS). This is the class of registers
218 that is allowed by "g" or "r" in a register constraint.
219 Also, registers outside this class are allocated only when
220 instructions express preferences for them.
222 The classes must be numbered in nondecreasing order; that is,
223 a larger-numbered class must never be contained completely
224 in a smaller-numbered class.
226 For any two classes, it is very desirable that there be another
227 class that represents their union. */
230 NO_REGS, DATA_REGS, ADDRESS_REGS, SP_REGS,
231 DATA_OR_ADDRESS_REGS, SP_OR_ADDRESS_REGS,
232 EXTENDED_REGS, DATA_OR_EXTENDED_REGS, ADDRESS_OR_EXTENDED_REGS,
233 SP_OR_EXTENDED_REGS, SP_OR_ADDRESS_OR_EXTENDED_REGS,
234 GENERAL_REGS, ALL_REGS, LIM_REG_CLASSES
237 #define N_REG_CLASSES (int) LIM_REG_CLASSES
239 /* Give names of register classes as strings for dump file. */
241 #define REG_CLASS_NAMES \
242 { "NO_REGS", "DATA_REGS", "ADDRESS_REGS", \
243 "SP_REGS", "DATA_OR_ADDRESS_REGS", "SP_OR_ADDRESS_REGS", \
245 "DATA_OR_EXTENDED_REGS", "ADDRESS_OR_EXTENDED_REGS", \
246 "SP_OR_EXTENDED_REGS", "SP_OR_ADDRESS_OR_EXTENDED_REGS", \
247 "GENERAL_REGS", "ALL_REGS", "LIM_REGS" }
249 /* Define which registers fit in which classes.
250 This is an initializer for a vector of HARD_REG_SET
251 of length N_REG_CLASSES. */
253 #define REG_CLASS_CONTENTS \
254 { {0}, /* No regs */ \
255 {0x0000f}, /* DATA_REGS */ \
256 {0x001f0}, /* ADDRESS_REGS */ \
257 {0x00200}, /* SP_REGS */ \
258 {0x001ff}, /* DATA_OR_ADDRESS_REGS */\
259 {0x003f0}, /* SP_OR_ADDRESS_REGS */\
260 {0x3fc00}, /* EXTENDED_REGS */ \
261 {0x3fc0f}, /* DATA_OR_EXTENDED_REGS */ \
262 {0x3fdf0}, /* ADDRESS_OR_EXTENDED_REGS */ \
263 {0x3fe00}, /* SP_OR_EXTENDED_REGS */ \
264 {0x3fff0}, /* SP_OR_ADDRESS_OR_EXTENDED_REGS */ \
265 {0x3fdff}, /* GENERAL_REGS */ \
266 {0x3ffff}, /* ALL_REGS */ \
269 /* The same information, inverted:
270 Return the class number of the smallest class containing
271 reg number REGNO. This could be a conditional expression
272 or could index an array. */
274 #define REGNO_REG_CLASS(REGNO) \
275 ((REGNO) < 4 ? DATA_REGS : \
276 (REGNO) < 9 ? ADDRESS_REGS : \
277 (REGNO) == 9 ? SP_REGS : \
278 (REGNO) < 18 ? EXTENDED_REGS : \
281 /* The class value for index registers, and the one for base regs. */
282 #define INDEX_REG_CLASS DATA_OR_EXTENDED_REGS
283 #define BASE_REG_CLASS SP_OR_ADDRESS_REGS
285 /* Get reg_class from a letter such as appears in the machine description. */
287 #define REG_CLASS_FROM_LETTER(C) \
288 ((C) == 'd' ? DATA_REGS : \
289 (C) == 'a' ? ADDRESS_REGS : \
290 (C) == 'x' ? EXTENDED_REGS : \
291 (C) == 'y' ? SP_REGS : NO_REGS)
293 /* Macros to check register numbers against specific register classes. */
295 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
296 and check its validity for a certain class.
297 We have two alternate definitions for each of them.
298 The usual definition accepts all pseudo regs; the other rejects
299 them unless they have been allocated suitable hard regs.
300 The symbol REG_OK_STRICT causes the latter definition to be used.
302 Most source files want to accept pseudo regs in the hope that
303 they will get allocated to the class that the insn wants them to be in.
304 Source files for reload pass need to be strict.
305 After reload, it makes no difference, since pseudo regs have
306 been eliminated by then. */
308 /* These assume that REGNO is a hard or pseudo reg number.
309 They give nonzero only if REGNO is a hard reg of the suitable class
310 or a pseudo reg currently allocated to a suitable hard reg.
311 Since they use reg_renumber, they are safe only once reg_renumber
312 has been allocated, which happens in local-alloc.c. */
314 #ifndef REG_OK_STRICT
315 # define REGNO_IN_RANGE_P(regno,min,max) \
316 (((regno) >= (min) && (regno) <= (max)) || (regno) >= FIRST_PSEUDO_REGISTER)
318 # define REGNO_IN_RANGE_P(regno,min,max) \
319 (((regno) >= (min) && (regno) <= (max)) \
321 && reg_renumber[(regno)] >= (min) && reg_renumber[(regno)] <= (max)))
324 #define REGNO_DATA_P(regno) REGNO_IN_RANGE_P ((regno), 0, 3)
325 #define REGNO_ADDRESS_P(regno) REGNO_IN_RANGE_P ((regno), 4, 8)
326 #define REGNO_SP_P(regno) REGNO_IN_RANGE_P ((regno), 9, 9)
327 #define REGNO_EXTENDED_P(regno) REGNO_IN_RANGE_P ((regno), 10, 17)
328 #define REGNO_AM33_P(regno) \
329 (REGNO_DATA_P ((regno)) || REGNO_ADDRESS_P ((regno)) \
330 || REGNO_EXTENDED_P ((regno)))
332 #define REGNO_OK_FOR_BASE_P(regno) \
333 (REGNO_SP_P ((regno)) \
334 || REGNO_ADDRESS_P ((regno)) || REGNO_EXTENDED_P ((regno)))
335 #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
337 #define REGNO_OK_FOR_BIT_BASE_P(regno) \
338 (REGNO_SP_P ((regno)) || REGNO_ADDRESS_P ((regno)))
339 #define REG_OK_FOR_BIT_BASE_P(X) REGNO_OK_FOR_BIT_BASE_P (REGNO (X))
341 #define REGNO_OK_FOR_INDEX_P(regno) \
342 (REGNO_DATA_P ((regno)) || REGNO_EXTENDED_P ((regno)))
343 #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
345 /* Given an rtx X being reloaded into a reg required to be
346 in class CLASS, return the class of reg to actually use.
347 In general this is just CLASS; but on some machines
348 in some cases it is preferable to use a more restrictive class. */
350 #define PREFERRED_RELOAD_CLASS(X,CLASS) \
351 (X == stack_pointer_rtx && CLASS != SP_REGS \
352 ? ADDRESS_OR_EXTENDED_REGS : CLASS)
354 #define PREFERRED_OUTPUT_RELOAD_CLASS(X,CLASS) \
355 (X == stack_pointer_rtx && CLASS != SP_REGS \
356 ? ADDRESS_OR_EXTENDED_REGS : CLASS)
358 #define LIMIT_RELOAD_CLASS(MODE, CLASS) \
359 (!TARGET_AM33 && (MODE == QImode || MODE == HImode) ? DATA_REGS : CLASS)
361 #define SECONDARY_RELOAD_CLASS(CLASS,MODE,IN) \
362 secondary_reload_class(CLASS,MODE,IN)
364 /* Return the maximum number of consecutive registers
365 needed to represent mode MODE in a register of class CLASS. */
367 #define CLASS_MAX_NREGS(CLASS, MODE) \
368 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
370 /* The letters I, J, K, L, M, N, O, P in a register constraint string
371 can be used to stand for particular ranges of immediate operands.
372 This macro defines what the ranges are.
373 C is the letter, and VALUE is a constant value.
374 Return 1 if VALUE is in the range specified by C. */
376 #define INT_8_BITS(VALUE) ((unsigned) (VALUE) + 0x80 < 0x100)
377 #define INT_16_BITS(VALUE) ((unsigned) (VALUE) + 0x8000 < 0x10000)
379 #define CONST_OK_FOR_I(VALUE) ((VALUE) == 0)
380 #define CONST_OK_FOR_J(VALUE) ((VALUE) == 1)
381 #define CONST_OK_FOR_K(VALUE) ((VALUE) == 2)
382 #define CONST_OK_FOR_L(VALUE) ((VALUE) == 4)
383 #define CONST_OK_FOR_M(VALUE) ((VALUE) == 3)
384 #define CONST_OK_FOR_N(VALUE) ((VALUE) == 255 || (VALUE) == 65535)
386 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
387 ((C) == 'I' ? CONST_OK_FOR_I (VALUE) : \
388 (C) == 'J' ? CONST_OK_FOR_J (VALUE) : \
389 (C) == 'K' ? CONST_OK_FOR_K (VALUE) : \
390 (C) == 'L' ? CONST_OK_FOR_L (VALUE) : \
391 (C) == 'M' ? CONST_OK_FOR_M (VALUE) : \
392 (C) == 'N' ? CONST_OK_FOR_N (VALUE) : 0)
395 /* Similar, but for floating constants, and defining letters G and H.
396 Here VALUE is the CONST_DOUBLE rtx itself.
398 `G' is a floating-point zero. */
400 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
401 ((C) == 'G' ? (GET_MODE_CLASS (GET_MODE (VALUE)) == MODE_FLOAT \
402 && (VALUE) == CONST0_RTX (GET_MODE (VALUE))) : 0)
405 /* Stack layout; function entry, exit and calling. */
407 /* Define this if pushing a word on the stack
408 makes the stack pointer a smaller address. */
410 #define STACK_GROWS_DOWNWARD
412 /* Define this if the nominal address of the stack frame
413 is at the high-address end of the local variables;
414 that is, each additional local variable allocated
415 goes at a more negative offset in the frame. */
417 #define FRAME_GROWS_DOWNWARD
419 /* Offset within stack frame to start allocating local variables at.
420 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
421 first local allocated. Otherwise, it is the offset to the BEGINNING
422 of the first local allocated. */
424 #define STARTING_FRAME_OFFSET 0
426 /* Offset of first parameter from the argument pointer register value. */
427 /* Is equal to the size of the saved fp + pc, even if an fp isn't
428 saved since the value is used before we know. */
430 #define FIRST_PARM_OFFSET(FNDECL) 4
432 /* Specify the registers used for certain standard purposes.
433 The values of these macros are register numbers. */
435 /* Register to use for pushing function arguments. */
436 #define STACK_POINTER_REGNUM 9
438 /* Base register for access to local variables of the function. */
439 #define FRAME_POINTER_REGNUM 7
441 /* Base register for access to arguments of the function. This
442 is a fake register and will be eliminated into either the frame
443 pointer or stack pointer. */
444 #define ARG_POINTER_REGNUM 8
446 /* Register in which static-chain is passed to a function. */
447 #define STATIC_CHAIN_REGNUM 5
449 #define ELIMINABLE_REGS \
450 {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
451 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
452 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
454 #define CAN_ELIMINATE(FROM, TO) 1
456 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
457 OFFSET = initial_offset (FROM, TO)
459 /* We can debug without frame pointers on the mn10300, so eliminate
460 them whenever possible. */
461 #define FRAME_POINTER_REQUIRED 0
462 #define CAN_DEBUG_WITHOUT_FP
464 /* A guess for the MN10300. */
465 #define PROMOTE_PROTOTYPES 1
467 /* Value is the number of bytes of arguments automatically
468 popped when returning from a subroutine call.
469 FUNDECL is the declaration node of the function (as a tree),
470 FUNTYPE is the data type of the function (as a tree),
471 or for a library call it is an identifier node for the subroutine name.
472 SIZE is the number of bytes of arguments passed on the stack. */
474 #define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) 0
476 /* We use d0/d1 for passing parameters, so allocate 8 bytes of space
477 for a register flushback area. */
478 #define REG_PARM_STACK_SPACE(DECL) 8
479 #define OUTGOING_REG_PARM_STACK_SPACE
480 #define ACCUMULATE_OUTGOING_ARGS 1
482 /* So we can allocate space for return pointers once for the function
483 instead of around every call. */
484 #define STACK_POINTER_OFFSET 4
486 /* 1 if N is a possible register number for function argument passing.
487 On the MN10300, no registers are used in this way. */
489 #define FUNCTION_ARG_REGNO_P(N) ((N) <= 1)
492 /* Define a data type for recording info about an argument list
493 during the scan of that argument list. This data type should
494 hold all necessary information about the function itself
495 and about the args processed so far, enough to enable macros
496 such as FUNCTION_ARG to determine where the next arg should go.
498 On the MN10300, this is a single integer, which is a number of bytes
499 of arguments scanned so far. */
501 #define CUMULATIVE_ARGS struct cum_arg
502 struct cum_arg {int nbytes; };
504 /* Initialize a variable CUM of type CUMULATIVE_ARGS
505 for a call to a function whose data type is FNTYPE.
506 For a library call, FNTYPE is 0.
508 On the MN10300, the offset starts at 0. */
510 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT) \
513 /* Update the data in CUM to advance over an argument
514 of mode MODE and data type TYPE.
515 (TYPE is null for libcalls where that information may not be available.) */
517 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
518 ((CUM).nbytes += ((MODE) != BLKmode \
519 ? (GET_MODE_SIZE (MODE) + 3) & ~3 \
520 : (int_size_in_bytes (TYPE) + 3) & ~3))
522 /* Define where to put the arguments to a function.
523 Value is zero to push the argument on the stack,
524 or a hard register in which to store the argument.
526 MODE is the argument's machine mode.
527 TYPE is the data type of the argument (as a tree).
528 This is null for libcalls where that information may
530 CUM is a variable of type CUMULATIVE_ARGS which gives info about
531 the preceding args and about the function being called.
532 NAMED is nonzero if this argument is a named parameter
533 (otherwise it is an extra parameter matching an ellipsis). */
535 /* On the MN10300 all args are pushed. */
537 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
538 function_arg (&CUM, MODE, TYPE, NAMED)
540 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
541 function_arg_partial_nregs (&CUM, MODE, TYPE, NAMED)
543 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
544 ((TYPE) && int_size_in_bytes (TYPE) > 8)
546 #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) \
547 ((TYPE) && int_size_in_bytes (TYPE) > 8)
549 /* Define how to find the value returned by a function.
550 VALTYPE is the data type of the value (as a tree).
551 If the precise function being called is known, FUNC is its FUNCTION_DECL;
552 otherwise, FUNC is 0. */
554 #define FUNCTION_VALUE(VALTYPE, FUNC) \
555 gen_rtx_REG (TYPE_MODE (VALTYPE), POINTER_TYPE_P (VALTYPE) ? 4 : 0)
557 /* Define how to find the value returned by a library function
558 assuming the value has mode MODE. */
560 #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, 0)
562 /* 1 if N is a possible register number for a function value. */
564 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0 || (N) == 4)
566 /* Return values > 8 bytes in length in memory. */
567 #define DEFAULT_PCC_STRUCT_RETURN 0
568 #define RETURN_IN_MEMORY(TYPE) \
569 (int_size_in_bytes (TYPE) > 8 || TYPE_MODE (TYPE) == BLKmode)
571 /* Register in which address to store a structure value
572 is passed to a function. On the MN10300 it's passed as
573 the first parameter. */
575 #define STRUCT_VALUE 0
577 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
578 the stack pointer does not matter. The value is tested only in
579 functions that have frame pointers.
580 No definition is equivalent to always zero. */
582 #define EXIT_IGNORE_STACK 1
584 /* Output assembler code to FILE to increment profiler label # LABELNO
585 for profiling a function entry. */
587 #define FUNCTION_PROFILER(FILE, LABELNO) ;
589 #define TRAMPOLINE_TEMPLATE(FILE) \
591 fprintf (FILE, "\tadd -4,sp\n"); \
592 fprintf (FILE, "\t.long 0x0004fffa\n"); \
593 fprintf (FILE, "\tmov (0,sp),a0\n"); \
594 fprintf (FILE, "\tadd 4,sp\n"); \
595 fprintf (FILE, "\tmov (13,a0),a1\n"); \
596 fprintf (FILE, "\tmov (17,a0),a0\n"); \
597 fprintf (FILE, "\tjmp (a0)\n"); \
598 fprintf (FILE, "\t.long 0\n"); \
599 fprintf (FILE, "\t.long 0\n"); \
602 /* Length in units of the trampoline for entering a nested function. */
604 #define TRAMPOLINE_SIZE 0x1b
606 #define TRAMPOLINE_ALIGNMENT 32
608 /* Emit RTL insns to initialize the variable parts of a trampoline.
609 FNADDR is an RTX for the address of the function's pure code.
610 CXT is an RTX for the static chain value for the function. */
612 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
614 emit_move_insn (gen_rtx_MEM (SImode, plus_constant ((TRAMP), 0x14)), \
616 emit_move_insn (gen_rtx_MEM (SImode, plus_constant ((TRAMP), 0x18)), \
619 /* A C expression whose value is RTL representing the value of the return
620 address for the frame COUNT steps up from the current frame.
622 On the mn10300, the return address is not at a constant location
623 due to the frame layout. Luckily, it is at a constant offset from
624 the argument pointer, so we define RETURN_ADDR_RTX to return a
625 MEM using arg_pointer_rtx. Reload will replace arg_pointer_rtx
626 with a reference to the stack/frame pointer + an appropriate offset. */
628 #define RETURN_ADDR_RTX(COUNT, FRAME) \
630 ? gen_rtx_MEM (Pmode, arg_pointer_rtx) \
633 /* Emit code for a call to builtin_saveregs. We must emit USE insns which
634 reference the 2 integer arg registers.
635 Ordinarily they are not call used registers, but they are for
636 _builtin_saveregs, so we must make this explicit. */
638 #define EXPAND_BUILTIN_SAVEREGS() mn10300_builtin_saveregs ()
640 /* Implement `va_start' for varargs and stdarg. */
641 #define EXPAND_BUILTIN_VA_START(stdarg, valist, nextarg) \
642 mn10300_va_start (stdarg, valist, nextarg)
644 /* Implement `va_arg'. */
645 #define EXPAND_BUILTIN_VA_ARG(valist, type) \
646 mn10300_va_arg (valist, type)
648 /* Addressing modes, and classification of registers for them. */
651 /* 1 if X is an rtx for a constant that is a valid address. */
653 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
655 /* Extra constraints. */
657 #define OK_FOR_R(OP) \
658 (GET_CODE (OP) == MEM \
659 && GET_MODE (OP) == QImode \
660 && (CONSTANT_ADDRESS_P (XEXP (OP, 0)) \
661 || (GET_CODE (XEXP (OP, 0)) == REG \
662 && REG_OK_FOR_BIT_BASE_P (XEXP (OP, 0)) \
663 && XEXP (OP, 0) != stack_pointer_rtx) \
664 || (GET_CODE (XEXP (OP, 0)) == PLUS \
665 && GET_CODE (XEXP (XEXP (OP, 0), 0)) == REG \
666 && REG_OK_FOR_BIT_BASE_P (XEXP (XEXP (OP, 0), 0)) \
667 && XEXP (XEXP (OP, 0), 0) != stack_pointer_rtx \
668 && GET_CODE (XEXP (XEXP (OP, 0), 1)) == CONST_INT \
669 && INT_8_BITS (INTVAL (XEXP (XEXP (OP, 0), 1))))))
671 #define EXTRA_CONSTRAINT(OP, C) \
672 ((C) == 'R' ? OK_FOR_R (OP) : (C) == 'S' ? GET_CODE (OP) == SYMBOL_REF : 0)
674 /* Maximum number of registers that can appear in a valid memory address. */
676 #define MAX_REGS_PER_ADDRESS 2
679 #define HAVE_POST_INCREMENT (TARGET_AM33)
681 /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
682 that is a valid memory address for an instruction.
683 The MODE argument is the machine mode for the MEM expression
684 that wants to use this address.
686 The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS,
687 except for CONSTANT_ADDRESS_P which is actually
690 On the mn10300, the value in the address register must be
691 in the same memory space/segment as the effective address.
693 This is problematical for reload since it does not understand
694 that base+index != index+base in a memory reference.
696 Note it is still possible to use reg+reg addressing modes,
697 it's just much more difficult. For a discussion of a possible
698 workaround and solution, see the comments in pa.c before the
699 function record_unscaled_index_insn_codes. */
701 /* Accept either REG or SUBREG where a register is valid. */
703 #define RTX_OK_FOR_BASE_P(X) \
704 ((REG_P (X) && REG_OK_FOR_BASE_P (X)) \
705 || (GET_CODE (X) == SUBREG && REG_P (SUBREG_REG (X)) \
706 && REG_OK_FOR_BASE_P (SUBREG_REG (X))))
708 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
710 if (CONSTANT_ADDRESS_P (X)) \
712 if (RTX_OK_FOR_BASE_P (X)) \
715 && GET_CODE (X) == POST_INC \
716 && RTX_OK_FOR_BASE_P (XEXP (X, 0)) \
717 && (MODE == SImode || MODE == SFmode || MODE == HImode))\
719 if (GET_CODE (X) == PLUS) \
721 rtx base = 0, index = 0; \
722 if (REG_P (XEXP (X, 0)) \
723 && REG_OK_FOR_BASE_P (XEXP (X, 0))) \
724 base = XEXP (X, 0), index = XEXP (X, 1); \
725 if (REG_P (XEXP (X, 1)) \
726 && REG_OK_FOR_BASE_P (XEXP (X, 1))) \
727 base = XEXP (X, 1), index = XEXP (X, 0); \
728 if (base != 0 && index != 0) \
730 if (GET_CODE (index) == CONST_INT) \
737 /* Try machine-dependent ways of modifying an illegitimate address
738 to be legitimate. If we find one, return the new, valid address.
739 This macro is used in only one place: `memory_address' in explow.c.
741 OLDX is the address as it was before break_out_memory_refs was called.
742 In some cases it is useful to look at this to decide what needs to be done.
744 MODE and WIN are passed so that this macro can use
745 GO_IF_LEGITIMATE_ADDRESS.
747 It is always safe for this macro to do nothing. It exists to recognize
748 opportunities to optimize the output. */
750 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
751 { rtx orig_x = (X); \
752 (X) = legitimize_address (X, OLDX, MODE); \
753 if ((X) != orig_x && memory_address_p (MODE, X)) \
756 /* Go to LABEL if ADDR (a legitimate address expression)
757 has an effect that depends on the machine mode it is used for. */
759 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \
760 if (GET_CODE (ADDR) == POST_INC) \
763 /* Nonzero if the constant value X is a legitimate general operand.
764 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */
766 #define LEGITIMATE_CONSTANT_P(X) 1
769 /* Tell final.c how to eliminate redundant test instructions. */
771 /* Here we define machine-dependent flags and fields in cc_status
772 (see `conditions.h'). No extra ones are needed for the vax. */
774 /* Store in cc_status the expressions
775 that the condition codes will describe
776 after execution of an instruction whose pattern is EXP.
777 Do not alter them if the instruction would not alter the cc's. */
779 #define CC_OVERFLOW_UNUSABLE 0x200
780 #define CC_NO_CARRY CC_NO_OVERFLOW
781 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
783 /* Compute the cost of computing a constant rtl expression RTX
784 whose rtx-code is CODE. The body of this macro is a portion
785 of a switch statement. If the code is computed here,
786 return it with a return statement. Otherwise, break from the switch. */
788 #define CONST_COSTS(RTX,CODE,OUTER_CODE) \
790 /* Zeros are extremely cheap. */ \
791 if (INTVAL (RTX) == 0 && OUTER_CODE == SET) \
793 /* If it fits in 8 bits, then it's still relatively cheap. */ \
794 if (INT_8_BITS (INTVAL (RTX))) \
796 /* This is the "base" cost, includes constants where either the \
797 upper or lower 16bits are all zeros. */ \
798 if (INT_16_BITS (INTVAL (RTX)) \
799 || (INTVAL (RTX) & 0xffff) == 0 \
800 || (INTVAL (RTX) & 0xffff0000) == 0) \
803 /* These are more costly than a CONST_INT, but we can relax them, \
804 so they're less costly than a CONST_DOUBLE. */ \
809 /* We don't optimize CONST_DOUBLEs well nor do we relax them well, \
810 so their cost is very high. */ \
814 #define REGISTER_MOVE_COST(CLASS1, CLASS2) \
815 ((CLASS1 == CLASS2 && (CLASS1 == ADDRESS_REGS || CLASS1 == DATA_REGS)) ? 2 :\
816 ((CLASS1 == ADDRESS_REGS || CLASS1 == DATA_REGS) && \
817 (CLASS2 == ADDRESS_REGS || CLASS2 == DATA_REGS)) ? 4 : \
818 (CLASS1 == SP_REGS && CLASS2 == ADDRESS_REGS) ? 2 : \
819 (CLASS1 == ADDRESS_REGS && CLASS2 == SP_REGS) ? 4 : \
820 ! TARGET_AM33 ? 6 : \
821 (CLASS1 == SP_REGS || CLASS2 == SP_REGS) ? 6 : \
822 (CLASS1 == CLASS2 && CLASS1 == EXTENDED_REGS) ? 6 : \
823 (CLASS1 == EXTENDED_REGS || CLASS2 == EXTENDED_REGS) ? 4 : \
826 #define ADDRESS_COST(X) mn10300_address_cost((X), 0)
828 /* A crude cut at RTX_COSTS for the MN10300. */
830 /* Provide the costs of a rtl expression. This is in the body of a
832 #define RTX_COSTS(RTX,CODE,OUTER_CODE) \
841 /* Nonzero if access to memory by bytes or half words is no faster
842 than accessing full words. */
843 #define SLOW_BYTE_ACCESS 1
845 /* Dispatch tables on the mn10300 are extremely expensive in terms of code
846 and readonly data size. So we crank up the case threshold value to
847 encourage a series of if/else comparisons to implement many small switch
848 statements. In theory, this value could be increased much more if we
849 were solely optimizing for space, but we keep it "reasonable" to avoid
850 serious code efficiency lossage. */
851 #define CASE_VALUES_THRESHOLD 6
853 #define NO_FUNCTION_CSE
855 /* According expr.c, a value of around 6 should minimize code size, and
856 for the MN10300 series, that's our primary concern. */
859 #define TEXT_SECTION_ASM_OP "\t.section .text"
860 #define DATA_SECTION_ASM_OP "\t.section .data"
861 #define BSS_SECTION_ASM_OP "\t.section .bss"
863 /* Output at beginning/end of assembler file. */
864 #undef ASM_FILE_START
865 #define ASM_FILE_START(FILE) asm_file_start(FILE)
867 #define ASM_COMMENT_START "#"
869 /* Output to assembler file text saying following lines
870 may contain character constants, extra white space, comments, etc. */
872 #define ASM_APP_ON "#APP\n"
874 /* Output to assembler file text saying following lines
875 no longer contain unusual constructs. */
877 #define ASM_APP_OFF "#NO_APP\n"
879 /* This is how to output an assembler line defining a `double' constant.
880 It is .dfloat or .gfloat, depending. */
882 #define ASM_OUTPUT_DOUBLE(FILE, VALUE) \
883 do { char dstr[30]; \
884 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", dstr); \
885 fprintf (FILE, "\t.double %s\n", dstr); \
889 /* This is how to output an assembler line defining a `float' constant. */
890 #define ASM_OUTPUT_FLOAT(FILE, VALUE) \
891 do { char dstr[30]; \
892 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", dstr); \
893 fprintf (FILE, "\t.float %s\n", dstr); \
896 /* This is how to output an assembler line defining an `int' constant. */
898 #define ASM_OUTPUT_INT(FILE, VALUE) \
899 ( fprintf (FILE, "\t.long "), \
900 output_addr_const (FILE, (VALUE)), \
901 fprintf (FILE, "\n"))
903 /* Likewise for `char' and `short' constants. */
905 #define ASM_OUTPUT_SHORT(FILE, VALUE) \
906 ( fprintf (FILE, "\t.hword "), \
907 output_addr_const (FILE, (VALUE)), \
908 fprintf (FILE, "\n"))
910 #define ASM_OUTPUT_CHAR(FILE, VALUE) \
911 ( fprintf (FILE, "\t.byte "), \
912 output_addr_const (FILE, (VALUE)), \
913 fprintf (FILE, "\n"))
915 /* This is how to output an assembler line for a numeric constant byte. */
916 #define ASM_OUTPUT_BYTE(FILE, VALUE) \
917 fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
919 /* Define the parentheses used to group arithmetic operations
920 in assembler code. */
922 #define ASM_OPEN_PAREN "("
923 #define ASM_CLOSE_PAREN ")"
925 /* This says how to output the assembler to define a global
926 uninitialized but not common symbol.
927 Try to use asm_output_bss to implement this macro. */
929 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
930 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
932 /* This is how to output the definition of a user-level label named NAME,
933 such as the label on a static function or variable NAME. */
935 #define ASM_OUTPUT_LABEL(FILE, NAME) \
936 do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
938 /* This is how to output a command to make the user-level label named NAME
939 defined for reference from other files. */
941 #define ASM_GLOBALIZE_LABEL(FILE, NAME) \
942 do { fputs ("\t.global ", FILE); assemble_name (FILE, NAME); fputs ("\n", FILE);} while (0)
944 /* This is how to output a reference to a user-level label named NAME.
945 `assemble_name' uses this. */
947 #undef ASM_OUTPUT_LABELREF
948 #define ASM_OUTPUT_LABELREF(FILE, NAME) \
950 const char* real_name; \
951 STRIP_NAME_ENCODING (real_name, (NAME)); \
952 fprintf (FILE, "_%s", real_name); \
955 /* Store in OUTPUT a string (made with alloca) containing
956 an assembler-name for a local static variable named NAME.
957 LABELNO is an integer which is different for each call. */
959 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
960 ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \
961 sprintf ((OUTPUT), "%s___%d", (NAME), (LABELNO)))
963 /* This is how we tell the assembler that two symbols have the same value. */
965 #define ASM_OUTPUT_DEF(FILE,NAME1,NAME2) \
966 do { assemble_name(FILE, NAME1); \
967 fputs(" = ", FILE); \
968 assemble_name(FILE, NAME2); \
969 fputc('\n', FILE); } while (0)
972 /* How to refer to registers in assembler output.
973 This sequence is indexed by compiler's hard-register-number (see above). */
975 #define REGISTER_NAMES \
976 { "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3", "ap", "sp", \
977 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7" \
980 #define ADDITIONAL_REGISTER_NAMES \
981 { {"r8", 4}, {"r9", 5}, {"r10", 6}, {"r11", 7}, \
982 {"r12", 0}, {"r13", 1}, {"r14", 2}, {"r15", 3}, \
983 {"e0", 10}, {"e1", 11}, {"e2", 12}, {"e3", 13}, \
984 {"e4", 14}, {"e5", 15}, {"e6", 16}, {"e7", 17} \
987 /* Print an instruction operand X on file FILE.
988 look in mn10300.c for details */
990 #define PRINT_OPERAND(FILE, X, CODE) print_operand(FILE,X,CODE)
992 /* Print a memory operand whose address is X, on file FILE.
993 This uses a function in output-vax.c. */
995 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR)
997 #define ASM_OUTPUT_REG_PUSH(FILE,REGNO)
998 #define ASM_OUTPUT_REG_POP(FILE,REGNO)
1000 /* This is how to output an element of a case-vector that is absolute. */
1002 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
1003 asm_fprintf (FILE, "\t%s .L%d\n", ".long", VALUE)
1005 /* This is how to output an element of a case-vector that is relative. */
1007 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
1008 fprintf (FILE, "\t%s .L%d-.L%d\n", ".long", VALUE, REL)
1010 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
1012 fprintf (FILE, "\t.align %d\n", (LOG))
1014 /* We don't have to worry about dbx compatibility for the mn10300. */
1015 #define DEFAULT_GDB_EXTENSIONS 1
1017 /* Use stabs debugging info by default. */
1018 #undef PREFERRED_DEBUGGING_TYPE
1019 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
1021 #define DBX_REGISTER_NUMBER(REGNO) REGNO
1023 /* GDB always assumes the current function's frame begins at the value
1024 of the stack pointer upon entry to the current function. Accessing
1025 local variables and parameters passed on the stack is done using the
1026 base of the frame + an offset provided by GCC.
1028 For functions which have frame pointers this method works fine;
1029 the (frame pointer) == (stack pointer at function entry) and GCC provides
1030 an offset relative to the frame pointer.
1032 This loses for functions without a frame pointer; GCC provides an offset
1033 which is relative to the stack pointer after adjusting for the function's
1034 frame size. GDB would prefer the offset to be relative to the value of
1035 the stack pointer at the function's entry. Yuk! */
1036 #define DEBUGGER_AUTO_OFFSET(X) \
1037 ((GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0) \
1038 + (frame_pointer_needed \
1039 ? 0 : -initial_offset (FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM)))
1041 #define DEBUGGER_ARG_OFFSET(OFFSET, X) \
1042 ((GET_CODE (X) == PLUS ? OFFSET : 0) \
1043 + (frame_pointer_needed \
1044 ? 0 : -initial_offset (ARG_POINTER_REGNUM, STACK_POINTER_REGNUM)))
1046 /* Define to use software floating point emulator for REAL_ARITHMETIC and
1047 decimal <-> binary conversion. */
1048 #define REAL_ARITHMETIC
1050 /* Specify the machine mode that this machine uses
1051 for the index in the tablejump instruction. */
1052 #define CASE_VECTOR_MODE Pmode
1054 /* Define if operations between registers always perform the operation
1055 on the full register even if a narrower mode is specified. */
1056 #define WORD_REGISTER_OPERATIONS
1058 #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND
1060 /* Specify the tree operation to be used to convert reals to integers. */
1061 #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
1063 /* This flag, if defined, says the same insns that convert to a signed fixnum
1064 also convert validly to an unsigned one. */
1065 #define FIXUNS_TRUNC_LIKE_FIX_TRUNC
1067 /* This is the kind of divide that is easiest to do in the general case. */
1068 #define EASY_DIV_EXPR TRUNC_DIV_EXPR
1070 /* Max number of bytes we can move from memory to memory
1071 in one reasonably fast instruction. */
1074 /* Define if shifts truncate the shift count
1075 which implies one can omit a sign-extension or zero-extension
1076 of a shift count. */
1077 #define SHIFT_COUNT_TRUNCATED 1
1079 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
1080 is done just by pretending it is already truncated. */
1081 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1083 /* Specify the machine mode that pointers have.
1084 After generation of rtl, the compiler makes no further distinction
1085 between pointers and any other objects of this machine mode. */
1086 #define Pmode SImode
1088 /* A function address in a call instruction
1089 is a byte address (for indexing purposes)
1090 so give the MEM rtx a byte's mode. */
1091 #define FUNCTION_MODE QImode
1093 /* The assembler op to get a word. */
1095 #define FILE_ASM_OP "\t.file\n"