1 /* Definitions of target machine for GNU compiler. NEC V850 series
2 Copyright (C) 1996, 1997, 1998, 1999 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. */
22 #include "svr4.h" /* Automatically does #undef CPP_PREDEFINES */
25 #define ASM_SPEC "%{mv*:-mv%*}"
28 #define CPP_SPEC "-D__v850__"
37 /* Names to predefine in the preprocessor for this target machine. */
38 #define CPP_PREDEFINES "-D__v851__ -D__v850"
40 /* Print subsidiary information on the compiler version in use. */
42 #ifndef TARGET_VERSION
43 #define TARGET_VERSION fprintf (stderr, " (NEC V850)");
47 /* Run-time compilation parameters selecting different hardware subsets. */
49 extern int target_flags;
51 /* Target flags bits, see below for an explanation of the bits. */
52 #define MASK_GHS 0x00000001
53 #define MASK_LONG_CALLS 0x00000002
54 #define MASK_EP 0x00000004
55 #define MASK_PROLOG_FUNCTION 0x00000008
56 #define MASK_DEBUG 0x40000000
58 #define MASK_CPU 0x00000030
59 #define MASK_V850 0x00000010
61 #define MASK_BIG_SWITCH 0x00000100
64 #define MASK_DEFAULT MASK_V850
67 #define TARGET_V850 ((target_flags & MASK_CPU) == MASK_V850)
70 /* Macros used in the machine description to test the flags. */
72 /* The GHS calling convention support doesn't really work,
73 mostly due to a lack of documentation. Outstanding issues:
75 * How do varargs & stdarg really work. How to they handle
76 passing structures (if at all).
78 * Doubles are normally 4 byte aligned, except in argument
79 lists where they are 8 byte aligned. Is the alignment
80 in the argument list based on the first parameter,
81 first stack parameter, etc etc.
83 * Passing/returning of large structures probably isn't the same
84 as GHS. We don't have enough documentation on their conventions
87 * Tests of SETUP_INCOMING_VARARGS need to be made runtime checks
88 since it depends on TARGET_GHS. */
89 #define TARGET_GHS (target_flags & MASK_GHS)
91 /* Don't do PC-relative calls, instead load the address of the target
92 function into a register and perform a register indirect call. */
93 #define TARGET_LONG_CALLS (target_flags & MASK_LONG_CALLS)
95 /* Whether to optimize space by using ep (r30) for pointers with small offsets
97 #define TARGET_EP (target_flags & MASK_EP)
99 /* Whether to call out-of-line functions to save registers or not. */
100 #define TARGET_PROLOG_FUNCTION (target_flags & MASK_PROLOG_FUNCTION)
102 /* Whether to emit 2 byte per entry or 4 byte per entry switch tables. */
103 #define TARGET_BIG_SWITCH (target_flags & MASK_BIG_SWITCH)
105 /* General debug flag */
106 #define TARGET_DEBUG (target_flags & MASK_DEBUG)
108 /* Macro to define tables used to set the flags.
109 This is a list in braces of pairs in braces,
110 each pair being { "NAME", VALUE }
111 where VALUE is the bits to set or minus the bits to clear.
112 An empty string NAME is used to identify the default VALUE. */
114 #define TARGET_SWITCHES \
115 {{ "ghs", MASK_GHS, "Support Green Hills ABI" }, \
116 { "no-ghs", -MASK_GHS, "" }, \
117 { "long-calls", MASK_LONG_CALLS, \
118 "Prohibit PC relative function calls" },\
119 { "no-long-calls", -MASK_LONG_CALLS, "" }, \
121 "Reuse r30 on a per function basis" }, \
122 { "no-ep", -MASK_EP, "" }, \
123 { "prolog-function", MASK_PROLOG_FUNCTION, \
124 "Use stubs for function prologues" }, \
125 { "no-prolog-function", -MASK_PROLOG_FUNCTION, "" }, \
126 { "space", MASK_EP | MASK_PROLOG_FUNCTION, \
127 "Same as: -mep -mprolog-function" }, \
128 { "debug", MASK_DEBUG, "Enable backend debugging" }, \
129 { "v850", MASK_V850, \
130 "Compile for the v850 processor" }, \
131 { "v850", -(MASK_V850 ^ MASK_CPU), "" }, \
132 { "big-switch", MASK_BIG_SWITCH, \
133 "Use 4 byte entries in switch tables" },\
135 { "", TARGET_DEFAULT, ""}}
137 #ifndef EXTRA_SWITCHES
138 #define EXTRA_SWITCHES
141 #ifndef TARGET_DEFAULT
142 #define TARGET_DEFAULT MASK_DEFAULT
145 /* Information about the various small memory areas. */
146 struct small_memory_info {
153 enum small_memory_type {
154 /* tiny data area, using EP as base register */
155 SMALL_MEMORY_TDA = 0,
156 /* small data area using dp as base register */
158 /* zero data area using r0 as base register */
163 extern struct small_memory_info small_memory[(int)SMALL_MEMORY_max];
165 /* This macro is similar to `TARGET_SWITCHES' but defines names of
166 command options that have values. Its definition is an
167 initializer with a subgrouping for each command option.
169 Each subgrouping contains a string constant, that defines the
170 fixed part of the option name, and the address of a variable. The
171 variable, type `char *', is set to the variable part of the given
172 option if the fixed part matches. The actual option name is made
173 by appending `-m' to the specified name.
175 Here is an example which defines `-mshort-data-NUMBER'. If the
176 given option is `-mshort-data-512', the variable `m88k_short_data'
177 will be set to the string `"512"'.
179 extern char *m88k_short_data;
180 #define TARGET_OPTIONS \
181 { { "short-data-", &m88k_short_data } } */
183 #define TARGET_OPTIONS \
185 { "tda=", &small_memory[ (int)SMALL_MEMORY_TDA ].value, \
186 "Set the max size of data eligible for the TDA area" }, \
187 { "tda-", &small_memory[ (int)SMALL_MEMORY_TDA ].value, "" }, \
188 { "sda=", &small_memory[ (int)SMALL_MEMORY_SDA ].value, \
189 "Set the max size of data eligible for the SDA area" }, \
190 { "sda-", &small_memory[ (int)SMALL_MEMORY_SDA ].value, "" }, \
191 { "zda=", &small_memory[ (int)SMALL_MEMORY_ZDA ].value, \
192 "Set the max size of data eligible for the ZDA area" }, \
193 { "zda-", &small_memory[ (int)SMALL_MEMORY_ZDA ].value, "" }, \
196 /* Sometimes certain combinations of command options do not make
197 sense on a particular target machine. You can define a macro
198 `OVERRIDE_OPTIONS' to take account of this. This macro, if
199 defined, is executed once just after all the command options have
202 Don't use this macro to turn on various extra optimizations for
203 `-O'. That is what `OPTIMIZATION_OPTIONS' is for. */
204 #define OVERRIDE_OPTIONS override_options ()
207 /* Show we can debug even without a frame pointer. */
208 #define CAN_DEBUG_WITHOUT_FP
210 /* Some machines may desire to change what optimizations are
211 performed for various optimization levels. This macro, if
212 defined, is executed once just after the optimization level is
213 determined and before the remainder of the command options have
214 been parsed. Values set in this macro are used as the default
215 values for the other command line options.
217 LEVEL is the optimization level specified; 2 if `-O2' is
218 specified, 1 if `-O' is specified, and 0 if neither is specified.
220 SIZE is non-zero if `-Os' is specified, 0 otherwise.
222 You should not use this macro to change options that are not
223 machine-specific. These should uniformly selected by the same
224 optimization level on all supported machines. Use this macro to
225 enable machine-specific optimizations.
227 *Do not examine `write_symbols' in this macro!* The debugging
228 options are not supposed to alter the generated code. */
230 #define OPTIMIZATION_OPTIONS(LEVEL,SIZE) \
233 target_flags |= (MASK_EP | MASK_PROLOG_FUNCTION); \
237 /* Target machine storage layout */
239 /* Define this if most significant bit is lowest numbered
240 in instructions that operate on numbered bit-fields.
241 This is not true on the NEC V850. */
242 #define BITS_BIG_ENDIAN 0
244 /* Define this if most significant byte of a word is the lowest numbered. */
245 /* This is not true on the NEC V850. */
246 #define BYTES_BIG_ENDIAN 0
248 /* Define this if most significant word of a multiword number is lowest
250 This is not true on the NEC V850. */
251 #define WORDS_BIG_ENDIAN 0
253 /* Number of bits in an addressable storage unit */
254 #define BITS_PER_UNIT 8
256 /* Width in bits of a "word", which is the contents of a machine register.
257 Note that this is not necessarily the width of data type `int';
258 if using 16-bit ints on a 68000, this would still be 32.
259 But on a machine with 16-bit registers, this would be 16. */
260 #define BITS_PER_WORD 32
262 /* Width of a word, in units (bytes). */
263 #define UNITS_PER_WORD 4
265 /* Width in bits of a pointer.
266 See also the macro `Pmode' defined below. */
267 #define POINTER_SIZE 32
269 /* Define this macro if it is advisable to hold scalars in registers
270 in a wider mode than that declared by the program. In such cases,
271 the value is constrained to be within the bounds of the declared
272 type, but kept valid in the wider mode. The signedness of the
273 extension may differ from that of the type.
275 Some simple experiments have shown that leaving UNSIGNEDP alone
276 generates the best overall code. */
278 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
279 if (GET_MODE_CLASS (MODE) == MODE_INT \
280 && GET_MODE_SIZE (MODE) < 4) \
283 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
284 #define PARM_BOUNDARY 32
286 /* The stack goes in 32 bit lumps. */
287 #define STACK_BOUNDARY 32
289 /* Allocation boundary (in *bits*) for the code of a function.
290 16 is the minimum boundary; 32 would give better performance. */
291 #define FUNCTION_BOUNDARY 16
293 /* No data type wants to be aligned rounder than this. */
294 #define BIGGEST_ALIGNMENT 32
296 /* Alignment of field after `int : 0' in a structure. */
297 #define EMPTY_FIELD_BOUNDARY 32
299 /* No structure field wants to be aligned rounder than this. */
300 #define BIGGEST_FIELD_ALIGNMENT 32
302 /* Define this if move instructions will actually fail to work
303 when given unaligned data. */
304 #define STRICT_ALIGNMENT 1
306 /* Define this as 1 if `char' should by default be signed; else as 0.
308 On the NEC V850, loads do sign extension, so make this default. */
309 #define DEFAULT_SIGNED_CHAR 1
311 /* Define results of standard character escape sequences. */
312 #define TARGET_BELL 007
313 #define TARGET_BS 010
314 #define TARGET_TAB 011
315 #define TARGET_NEWLINE 012
316 #define TARGET_VT 013
317 #define TARGET_FF 014
318 #define TARGET_CR 015
320 /* Standard register usage. */
322 /* Number of actual hardware registers.
323 The hardware registers are assigned numbers for the compiler
324 from 0 to just below FIRST_PSEUDO_REGISTER.
326 All registers that the compiler knows about must be given numbers,
327 even those that are not normally considered general registers. */
329 #define FIRST_PSEUDO_REGISTER 34
331 /* 1 for registers that have pervasive standard uses
332 and are not available for the register allocator. */
334 #define FIXED_REGISTERS \
335 { 1, 1, 0, 1, 1, 0, 0, 0, \
336 0, 0, 0, 0, 0, 0, 0, 0, \
337 0, 0, 0, 0, 0, 0, 0, 0, \
338 0, 0, 0, 0, 0, 0, 1, 0, \
341 /* 1 for registers not available across function calls.
342 These must include the FIXED_REGISTERS and also any
343 registers that can be used without being saved.
344 The latter must include the registers where values are returned
345 and the register where structure-value addresses are passed.
346 Aside from that, you can include as many other registers as you
349 #define CALL_USED_REGISTERS \
350 { 1, 1, 0, 1, 1, 1, 1, 1, \
351 1, 1, 1, 1, 1, 1, 1, 1, \
352 1, 1, 1, 1, 0, 0, 0, 0, \
353 0, 0, 0, 0, 0, 0, 1, 1, \
356 /* List the order in which to allocate registers. Each register must be
357 listed once, even those in FIXED_REGISTERS.
359 On the 850, we make the return registers first, then all of the volatile
360 registers, then the saved registers in reverse order to better save the
361 registers with an out of line function, and finally the fixed
364 #define REG_ALLOC_ORDER \
366 10, 11, /* return registers */ \
367 12, 13, 14, 15, 16, 17, 18, 19, /* scratch registers */ \
368 6, 7, 8, 9, 31, /* argument registers */ \
369 29, 28, 27, 26, 25, 24, 23, 22, /* saved registers */ \
371 0, 1, 3, 4, 5, 30, 32, 33 /* fixed registers */ \
374 /* Return number of consecutive hard regs needed starting at reg REGNO
375 to hold something of mode MODE.
377 This is ordinarily the length in words of a value of mode MODE
378 but can be less for certain modes in special long registers. */
380 #define HARD_REGNO_NREGS(REGNO, MODE) \
381 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
383 /* Value is 1 if hard register REGNO can hold a value of machine-mode
386 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
387 ((((REGNO) & 1) == 0) || (GET_MODE_SIZE (MODE) <= 4))
389 /* Value is 1 if it is a good idea to tie two pseudo registers
390 when one has mode MODE1 and one has mode MODE2.
391 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
392 for any hard reg, then this must be 0 for correct output. */
393 #define MODES_TIEABLE_P(MODE1, MODE2) \
394 (MODE1 == MODE2 || GET_MODE_SIZE (MODE1) <= 4 && GET_MODE_SIZE (MODE2) <= 4)
397 /* Define the classes of registers for register constraints in the
398 machine description. Also define ranges of constants.
400 One of the classes must always be named ALL_REGS and include all hard regs.
401 If there is more than one class, another class must be named NO_REGS
402 and contain no registers.
404 The name GENERAL_REGS must be the name of a class (or an alias for
405 another name such as ALL_REGS). This is the class of registers
406 that is allowed by "g" or "r" in a register constraint.
407 Also, registers outside this class are allocated only when
408 instructions express preferences for them.
410 The classes must be numbered in nondecreasing order; that is,
411 a larger-numbered class must never be contained completely
412 in a smaller-numbered class.
414 For any two classes, it is very desirable that there be another
415 class that represents their union. */
419 NO_REGS, GENERAL_REGS, ALL_REGS, LIM_REG_CLASSES
422 #define N_REG_CLASSES (int) LIM_REG_CLASSES
424 /* Give names of register classes as strings for dump file. */
426 #define REG_CLASS_NAMES \
427 { "NO_REGS", "GENERAL_REGS", "ALL_REGS", "LIM_REGS" }
429 /* Define which registers fit in which classes.
430 This is an initializer for a vector of HARD_REG_SET
431 of length N_REG_CLASSES. */
433 #define REG_CLASS_CONTENTS \
434 { 0x00000000, /* No regs */ \
435 0xffffffff, /* GENERAL_REGS */ \
436 0xffffffff, /* ALL_REGS */ \
439 /* The same information, inverted:
440 Return the class number of the smallest class containing
441 reg number REGNO. This could be a conditional expression
442 or could index an array. */
444 #define REGNO_REG_CLASS(REGNO) GENERAL_REGS
446 /* The class value for index registers, and the one for base regs. */
448 #define INDEX_REG_CLASS NO_REGS
449 #define BASE_REG_CLASS GENERAL_REGS
451 /* Get reg_class from a letter such as appears in the machine description. */
453 #define REG_CLASS_FROM_LETTER(C) (NO_REGS)
455 /* Macros to check register numbers against specific register classes. */
457 /* These assume that REGNO is a hard or pseudo reg number.
458 They give nonzero only if REGNO is a hard reg of the suitable class
459 or a pseudo reg currently allocated to a suitable hard reg.
460 Since they use reg_renumber, they are safe only once reg_renumber
461 has been allocated, which happens in local-alloc.c. */
463 #define REGNO_OK_FOR_BASE_P(regno) \
464 ((regno) < FIRST_PSEUDO_REGISTER || reg_renumber[regno] >= 0)
466 #define REGNO_OK_FOR_INDEX_P(regno) 0
468 /* Given an rtx X being reloaded into a reg required to be
469 in class CLASS, return the class of reg to actually use.
470 In general this is just CLASS; but on some machines
471 in some cases it is preferable to use a more restrictive class. */
473 #define PREFERRED_RELOAD_CLASS(X,CLASS) (CLASS)
475 /* Return the maximum number of consecutive registers
476 needed to represent mode MODE in a register of class CLASS. */
478 #define CLASS_MAX_NREGS(CLASS, MODE) \
479 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
481 /* The letters I, J, K, L, M, N, O, P in a register constraint string
482 can be used to stand for particular ranges of immediate operands.
483 This macro defines what the ranges are.
484 C is the letter, and VALUE is a constant value.
485 Return 1 if VALUE is in the range specified by C. */
487 #define INT_7_BITS(VALUE) ((unsigned) (VALUE) + 0x40 < 0x80)
488 #define INT_8_BITS(VALUE) ((unsigned) (VALUE) + 0x80 < 0x100)
490 #define CONST_OK_FOR_I(VALUE) ((VALUE) == 0)
491 /* 5 bit signed immediate */
492 #define CONST_OK_FOR_J(VALUE) ((unsigned) (VALUE) + 0x10 < 0x20)
493 /* 16 bit signed immediate */
494 #define CONST_OK_FOR_K(VALUE) ((unsigned) (VALUE) + 0x8000 < 0x10000)
495 /* valid constant for movhi instruction. */
496 #define CONST_OK_FOR_L(VALUE) \
497 (((unsigned) ((int) (VALUE) >> 16) + 0x8000 < 0x10000) \
498 && CONST_OK_FOR_I ((VALUE & 0xffff)))
499 /* 16 bit unsigned immediate */
500 #define CONST_OK_FOR_M(VALUE) ((unsigned)(VALUE) < 0x10000)
501 /* 5 bit unsigned immediate in shift instructions */
502 #define CONST_OK_FOR_N(VALUE) ((unsigned) (VALUE) <= 31)
504 #define CONST_OK_FOR_O(VALUE) 0
505 #define CONST_OK_FOR_P(VALUE) 0
508 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
509 ((C) == 'I' ? CONST_OK_FOR_I (VALUE) : \
510 (C) == 'J' ? CONST_OK_FOR_J (VALUE) : \
511 (C) == 'K' ? CONST_OK_FOR_K (VALUE) : \
512 (C) == 'L' ? CONST_OK_FOR_L (VALUE) : \
513 (C) == 'M' ? CONST_OK_FOR_M (VALUE) : \
514 (C) == 'N' ? CONST_OK_FOR_N (VALUE) : \
515 (C) == 'O' ? CONST_OK_FOR_O (VALUE) : \
516 (C) == 'P' ? CONST_OK_FOR_P (VALUE) : \
519 /* Similar, but for floating constants, and defining letters G and H.
520 Here VALUE is the CONST_DOUBLE rtx itself.
522 `G' is a zero of some form. */
524 #define CONST_DOUBLE_OK_FOR_G(VALUE) \
525 ((GET_MODE_CLASS (GET_MODE (VALUE)) == MODE_FLOAT \
526 && (VALUE) == CONST0_RTX (GET_MODE (VALUE))) \
527 || (GET_MODE_CLASS (GET_MODE (VALUE)) == MODE_INT \
528 && CONST_DOUBLE_LOW (VALUE) == 0 \
529 && CONST_DOUBLE_HIGH (VALUE) == 0))
531 #define CONST_DOUBLE_OK_FOR_H(VALUE) 0
533 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
534 ((C) == 'G' ? CONST_DOUBLE_OK_FOR_G (VALUE) \
535 : (C) == 'H' ? CONST_DOUBLE_OK_FOR_H (VALUE) \
539 /* Stack layout; function entry, exit and calling. */
541 /* Define this if pushing a word on the stack
542 makes the stack pointer a smaller address. */
544 #define STACK_GROWS_DOWNWARD
546 /* Define this if the nominal address of the stack frame
547 is at the high-address end of the local variables;
548 that is, each additional local variable allocated
549 goes at a more negative offset in the frame. */
551 #define FRAME_GROWS_DOWNWARD
553 /* Offset within stack frame to start allocating local variables at.
554 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
555 first local allocated. Otherwise, it is the offset to the BEGINNING
556 of the first local allocated. */
558 #define STARTING_FRAME_OFFSET 0
560 /* Offset of first parameter from the argument pointer register value. */
561 /* Is equal to the size of the saved fp + pc, even if an fp isn't
562 saved since the value is used before we know. */
564 #define FIRST_PARM_OFFSET(FNDECL) 0
566 /* Specify the registers used for certain standard purposes.
567 The values of these macros are register numbers. */
569 /* Register to use for pushing function arguments. */
570 #define STACK_POINTER_REGNUM 3
572 /* Base register for access to local variables of the function. */
573 #define FRAME_POINTER_REGNUM 32
575 /* Register containing return address from latest function call. */
576 #define LINK_POINTER_REGNUM 31
578 /* On some machines the offset between the frame pointer and starting
579 offset of the automatic variables is not known until after register
580 allocation has been done (for example, because the saved registers
581 are between these two locations). On those machines, define
582 `FRAME_POINTER_REGNUM' the number of a special, fixed register to
583 be used internally until the offset is known, and define
584 `HARD_FRAME_POINTER_REGNUM' to be actual the hard register number
585 used for the frame pointer.
587 You should define this macro only in the very rare circumstances
588 when it is not possible to calculate the offset between the frame
589 pointer and the automatic variables until after register
590 allocation has been completed. When this macro is defined, you
591 must also indicate in your definition of `ELIMINABLE_REGS' how to
592 eliminate `FRAME_POINTER_REGNUM' into either
593 `HARD_FRAME_POINTER_REGNUM' or `STACK_POINTER_REGNUM'.
595 Do not define this macro if it would be the same as
596 `FRAME_POINTER_REGNUM'. */
597 #undef HARD_FRAME_POINTER_REGNUM
598 #define HARD_FRAME_POINTER_REGNUM 29
600 /* Base register for access to arguments of the function. */
601 #define ARG_POINTER_REGNUM 33
603 /* Register in which static-chain is passed to a function. */
604 #define STATIC_CHAIN_REGNUM 20
606 /* Value should be nonzero if functions must have frame pointers.
607 Zero means the frame pointer need not be set up (and parms
608 may be accessed via the stack pointer) in functions that seem suitable.
609 This is computed in `reload', in reload1.c. */
610 #define FRAME_POINTER_REQUIRED 0
612 /* If defined, this macro specifies a table of register pairs used to
613 eliminate unneeded registers that point into the stack frame. If
614 it is not defined, the only elimination attempted by the compiler
615 is to replace references to the frame pointer with references to
618 The definition of this macro is a list of structure
619 initializations, each of which specifies an original and
620 replacement register.
622 On some machines, the position of the argument pointer is not
623 known until the compilation is completed. In such a case, a
624 separate hard register must be used for the argument pointer.
625 This register can be eliminated by replacing it with either the
626 frame pointer or the argument pointer, depending on whether or not
627 the frame pointer has been eliminated.
629 In this case, you might specify:
630 #define ELIMINABLE_REGS \
631 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
632 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
633 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
635 Note that the elimination of the argument pointer with the stack
636 pointer is specified first since that is the preferred elimination. */
638 #define ELIMINABLE_REGS \
639 {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
640 { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM }, \
641 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
642 { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM }} \
644 /* A C expression that returns non-zero if the compiler is allowed to
645 try to replace register number FROM-REG with register number
646 TO-REG. This macro need only be defined if `ELIMINABLE_REGS' is
647 defined, and will usually be the constant 1, since most of the
648 cases preventing register elimination are things that the compiler
649 already knows about. */
651 #define CAN_ELIMINATE(FROM, TO) \
652 ((TO) == STACK_POINTER_REGNUM ? ! frame_pointer_needed : 1)
654 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It
655 specifies the initial difference between the specified pair of
656 registers. This macro must be defined if `ELIMINABLE_REGS' is
659 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
661 if ((FROM) == FRAME_POINTER_REGNUM) \
662 (OFFSET) = get_frame_size () + current_function_outgoing_args_size; \
663 else if ((FROM) == ARG_POINTER_REGNUM) \
664 (OFFSET) = compute_frame_size (get_frame_size (), (long *)0); \
669 /* A guess for the V850. */
670 #define PROMOTE_PROTOTYPES 1
672 /* Keep the stack pointer constant throughout the function. */
673 #define ACCUMULATE_OUTGOING_ARGS
675 /* Value is the number of bytes of arguments automatically
676 popped when returning from a subroutine call.
677 FUNDECL is the declaration node of the function (as a tree),
678 FUNTYPE is the data type of the function (as a tree),
679 or for a library call it is an identifier node for the subroutine name.
680 SIZE is the number of bytes of arguments passed on the stack. */
682 #define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) 0
685 /* Define a data type for recording info about an argument list
686 during the scan of that argument list. This data type should
687 hold all necessary information about the function itself
688 and about the args processed so far, enough to enable macros
689 such as FUNCTION_ARG to determine where the next arg should go. */
691 #define CUMULATIVE_ARGS struct cum_arg
692 struct cum_arg { int nbytes; };
694 /* Define where to put the arguments to a function.
695 Value is zero to push the argument on the stack,
696 or a hard register in which to store the argument.
698 MODE is the argument's machine mode.
699 TYPE is the data type of the argument (as a tree).
700 This is null for libcalls where that information may
702 CUM is a variable of type CUMULATIVE_ARGS which gives info about
703 the preceding args and about the function being called.
704 NAMED is nonzero if this argument is a named parameter
705 (otherwise it is an extra parameter matching an ellipsis). */
707 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
708 function_arg (&CUM, MODE, TYPE, NAMED)
710 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
711 function_arg_partial_nregs (&CUM, MODE, TYPE, NAMED)
713 /* Initialize a variable CUM of type CUMULATIVE_ARGS
714 for a call to a function whose data type is FNTYPE.
715 For a library call, FNTYPE is 0. */
717 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT) \
720 /* Update the data in CUM to advance over an argument
721 of mode MODE and data type TYPE.
722 (TYPE is null for libcalls where that information may not be available.) */
724 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
725 ((CUM).nbytes += ((MODE) != BLKmode \
726 ? (GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) & -UNITS_PER_WORD \
727 : (int_size_in_bytes (TYPE) + UNITS_PER_WORD - 1) & -UNITS_PER_WORD))
729 /* When a parameter is passed in a register, stack space is still
731 #define REG_PARM_STACK_SPACE(DECL) (!TARGET_GHS ? 16 : 0)
733 /* Define this if the above stack space is to be considered part of the
734 space allocated by the caller. */
735 #define OUTGOING_REG_PARM_STACK_SPACE
737 extern int current_function_anonymous_args;
738 /* Do any setup necessary for varargs/stdargs functions. */
739 #define SETUP_INCOMING_VARARGS(CUM, MODE, TYPE, PAS, SECOND) \
740 current_function_anonymous_args = (!TARGET_GHS ? 1 : 0);
742 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
743 ((TYPE) && int_size_in_bytes (TYPE) > 8)
745 #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) \
746 ((TYPE) && int_size_in_bytes (TYPE) > 8)
748 /* 1 if N is a possible register number for function argument passing. */
750 #define FUNCTION_ARG_REGNO_P(N) (N >= 6 && N <= 9)
752 /* Define how to find the value returned by a function.
753 VALTYPE is the data type of the value (as a tree).
754 If the precise function being called is known, FUNC is its FUNCTION_DECL;
755 otherwise, FUNC is 0. */
757 #define FUNCTION_VALUE(VALTYPE, FUNC) \
758 gen_rtx (REG, TYPE_MODE (VALTYPE), 10)
760 /* Define how to find the value returned by a library function
761 assuming the value has mode MODE. */
763 #define LIBCALL_VALUE(MODE) \
764 gen_rtx (REG, MODE, 10)
766 /* 1 if N is a possible register number for a function value. */
768 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 10)
770 /* Return values > 8 bytes in length in memory. */
771 #define DEFAULT_PCC_STRUCT_RETURN 0
772 #define RETURN_IN_MEMORY(TYPE) \
773 (int_size_in_bytes (TYPE) > 8 || TYPE_MODE (TYPE) == BLKmode)
775 /* Register in which address to store a structure value
776 is passed to a function. On the V850 it's passed as
777 the first parameter. */
779 #define STRUCT_VALUE 0
781 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
782 the stack pointer does not matter. The value is tested only in
783 functions that have frame pointers.
784 No definition is equivalent to always zero. */
786 #define EXIT_IGNORE_STACK 1
788 /* Output assembler code to FILE to increment profiler label # LABELNO
789 for profiling a function entry. */
791 #define FUNCTION_PROFILER(FILE, LABELNO) ;
793 #define TRAMPOLINE_TEMPLATE(FILE) \
795 fprintf (FILE, "\tjarl .+4,r12\n"); \
796 fprintf (FILE, "\tld.w 12[r12],r5\n"); \
797 fprintf (FILE, "\tld.w 16[r12],r12\n"); \
798 fprintf (FILE, "\tjmp [r12]\n"); \
799 fprintf (FILE, "\tnop\n"); \
800 fprintf (FILE, "\t.long 0\n"); \
801 fprintf (FILE, "\t.long 0\n"); \
804 /* Length in units of the trampoline for entering a nested function. */
806 #define TRAMPOLINE_SIZE 24
808 /* Emit RTL insns to initialize the variable parts of a trampoline.
809 FNADDR is an RTX for the address of the function's pure code.
810 CXT is an RTX for the static chain value for the function. */
812 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
814 emit_move_insn (gen_rtx (MEM, SImode, plus_constant ((TRAMP), 16)), \
816 emit_move_insn (gen_rtx (MEM, SImode, plus_constant ((TRAMP), 20)), \
820 /* Addressing modes, and classification of registers for them. */
823 /* 1 if X is an rtx for a constant that is a valid address. */
825 /* ??? This seems too exclusive. May get better code by accepting more
826 possibilities here, in particular, should accept ZDA_NAME SYMBOL_REFs. */
828 #define CONSTANT_ADDRESS_P(X) \
829 (GET_CODE (X) == CONST_INT \
830 && CONST_OK_FOR_K (INTVAL (X)))
832 /* Maximum number of registers that can appear in a valid memory address. */
834 #define MAX_REGS_PER_ADDRESS 1
836 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
837 and check its validity for a certain class.
838 We have two alternate definitions for each of them.
839 The usual definition accepts all pseudo regs; the other rejects
840 them unless they have been allocated suitable hard regs.
841 The symbol REG_OK_STRICT causes the latter definition to be used.
843 Most source files want to accept pseudo regs in the hope that
844 they will get allocated to the class that the insn wants them to be in.
845 Source files for reload pass need to be strict.
846 After reload, it makes no difference, since pseudo regs have
847 been eliminated by then. */
849 #ifndef REG_OK_STRICT
851 /* Nonzero if X is a hard reg that can be used as an index
852 or if it is a pseudo reg. */
853 #define REG_OK_FOR_INDEX_P(X) 0
854 /* Nonzero if X is a hard reg that can be used as a base reg
855 or if it is a pseudo reg. */
856 #define REG_OK_FOR_BASE_P(X) 1
857 #define REG_OK_FOR_INDEX_P_STRICT(X) 0
858 #define REG_OK_FOR_BASE_P_STRICT(X) REGNO_OK_FOR_BASE_P (REGNO (X))
863 /* Nonzero if X is a hard reg that can be used as an index. */
864 #define REG_OK_FOR_INDEX_P(X) 0
865 /* Nonzero if X is a hard reg that can be used as a base reg. */
866 #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
871 /* A C expression that defines the optional machine-dependent
872 constraint letters that can be used to segregate specific types of
873 operands, usually memory references, for the target machine.
874 Normally this macro will not be defined. If it is required for a
875 particular target machine, it should return 1 if VALUE corresponds
876 to the operand type represented by the constraint letter C. If C
877 is not defined as an extra constraint, the value returned should
878 be 0 regardless of VALUE.
880 For example, on the ROMP, load instructions cannot have their
881 output in r0 if the memory reference contains a symbolic address.
882 Constraint letter `Q' is defined as representing a memory address
883 that does *not* contain a symbolic address. An alternative is
884 specified with a `Q' constraint on the input and `r' on the
885 output. The next alternative specifies `m' on the input and a
886 register class that does not include r0 on the output. */
888 #define EXTRA_CONSTRAINT(OP, C) \
889 ((C) == 'Q' ? ep_memory_operand (OP, GET_MODE (OP)) \
890 : (C) == 'R' ? special_symbolref_operand (OP, VOIDmode) \
891 : (C) == 'S' ? (GET_CODE (OP) == SYMBOL_REF && ! ZDA_NAME_P (XSTR (OP, 0))) \
893 : (C) == 'U' ? ((GET_CODE (OP) == SYMBOL_REF && ZDA_NAME_P (XSTR (OP, 0))) \
894 || (GET_CODE (OP) == CONST \
895 && GET_CODE (XEXP (OP, 0)) == PLUS \
896 && GET_CODE (XEXP (XEXP (OP, 0), 0)) == SYMBOL_REF \
897 && ZDA_NAME_P (XSTR (XEXP (XEXP (OP, 0), 0), 0)))) \
900 /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
901 that is a valid memory address for an instruction.
902 The MODE argument is the machine mode for the MEM expression
903 that wants to use this address.
905 The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS,
906 except for CONSTANT_ADDRESS_P which is actually
907 machine-independent. */
909 /* Accept either REG or SUBREG where a register is valid. */
911 #define RTX_OK_FOR_BASE_P(X) \
912 ((REG_P (X) && REG_OK_FOR_BASE_P (X)) \
913 || (GET_CODE (X) == SUBREG && REG_P (SUBREG_REG (X)) \
914 && REG_OK_FOR_BASE_P (SUBREG_REG (X))))
916 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
918 if (RTX_OK_FOR_BASE_P (X)) goto ADDR; \
919 if (CONSTANT_ADDRESS_P (X) \
920 && (MODE == QImode || INTVAL (X) % 2 == 0)) \
922 if (GET_CODE (X) == LO_SUM \
923 && GET_CODE (XEXP (X, 0)) == REG \
924 && REG_OK_FOR_BASE_P (XEXP (X, 0)) \
925 && CONSTANT_P (XEXP (X, 1)) \
926 && (GET_CODE (XEXP (X, 1)) != CONST_INT \
927 || ((MODE == QImode || INTVAL (XEXP (X, 1)) % 2 == 0) \
928 && CONST_OK_FOR_K (INTVAL (XEXP (X, 1))))) \
929 && GET_MODE_SIZE (MODE) <= GET_MODE_SIZE (word_mode)) \
931 if (special_symbolref_operand (X, MODE) \
932 && (GET_MODE_SIZE (MODE) <= GET_MODE_SIZE (word_mode))) \
934 if (GET_CODE (X) == PLUS \
935 && CONSTANT_ADDRESS_P (XEXP (X, 1)) \
936 && (MODE == QImode || INTVAL (XEXP (X, 1)) % 2 == 0) \
937 && RTX_OK_FOR_BASE_P (XEXP (X, 0))) goto ADDR; \
941 /* Try machine-dependent ways of modifying an illegitimate address
942 to be legitimate. If we find one, return the new, valid address.
943 This macro is used in only one place: `memory_address' in explow.c.
945 OLDX is the address as it was before break_out_memory_refs was called.
946 In some cases it is useful to look at this to decide what needs to be done.
948 MODE and WIN are passed so that this macro can use
949 GO_IF_LEGITIMATE_ADDRESS.
951 It is always safe for this macro to do nothing. It exists to recognize
952 opportunities to optimize the output. */
954 #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) {}
956 /* Go to LABEL if ADDR (a legitimate address expression)
957 has an effect that depends on the machine mode it is used for. */
959 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) {}
961 /* Nonzero if the constant value X is a legitimate general operand.
962 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */
964 #define LEGITIMATE_CONSTANT_P(X) \
965 (GET_CODE (X) == CONST_DOUBLE \
966 || !(GET_CODE (X) == CONST \
967 && GET_CODE (XEXP (X, 0)) == PLUS \
968 && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF \
969 && GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT \
970 && ! CONST_OK_FOR_K (INTVAL (XEXP (XEXP (X, 0), 1)))))
972 /* In rare cases, correct code generation requires extra machine
973 dependent processing between the second jump optimization pass and
974 delayed branch scheduling. On those machines, define this macro
975 as a C statement to act on the code starting at INSN. */
977 #define MACHINE_DEPENDENT_REORG(INSN) v850_reorg (INSN)
980 /* Tell final.c how to eliminate redundant test instructions. */
982 /* Here we define machine-dependent flags and fields in cc_status
983 (see `conditions.h'). No extra ones are needed for the vax. */
985 /* Store in cc_status the expressions
986 that the condition codes will describe
987 after execution of an instruction whose pattern is EXP.
988 Do not alter them if the instruction would not alter the cc's. */
990 #define CC_OVERFLOW_UNUSABLE 0x200
991 #define CC_NO_CARRY CC_NO_OVERFLOW
992 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
994 /* A part of a C `switch' statement that describes the relative costs
995 of constant RTL expressions. It must contain `case' labels for
996 expression codes `const_int', `const', `symbol_ref', `label_ref'
997 and `const_double'. Each case must ultimately reach a `return'
998 statement to return the relative cost of the use of that kind of
999 constant value in an expression. The cost may depend on the
1000 precise value of the constant, which is available for examination
1001 in X, and the rtx code of the expression in which it is contained,
1002 found in OUTER_CODE.
1004 CODE is the expression code--redundant, since it can be obtained
1005 with `GET_CODE (X)'. */
1007 #define CONST_COSTS(RTX,CODE,OUTER_CODE) \
1009 case CONST_DOUBLE: \
1014 int _zxy = const_costs(RTX, CODE); \
1015 return (_zxy) ? COSTS_N_INSNS (_zxy) : 0; \
1018 /* A crude cut at RTX_COSTS for the V850. */
1020 /* Provide the costs of a rtl expression. This is in the body of a
1023 There aren't DImode MOD, DIV or MULT operations, so call them
1024 very expensive. Everything else is pretty much a constant cost. */
1026 #define RTX_COSTS(RTX,CODE,OUTER_CODE) \
1033 /* All addressing modes have the same cost on the V850 series. */
1034 #define ADDRESS_COST(ADDR) 1
1036 /* Nonzero if access to memory by bytes or half words is no faster
1037 than accessing full words. */
1038 #define SLOW_BYTE_ACCESS 1
1040 /* Define this if zero-extension is slow (more than one real instruction). */
1041 #define SLOW_ZERO_EXTEND
1043 /* According expr.c, a value of around 6 should minimize code size, and
1044 for the V850 series, that's our primary concern. */
1045 #define MOVE_RATIO 6
1047 /* Indirect calls are expensive, never turn a direct call
1048 into an indirect call. */
1049 #define NO_FUNCTION_CSE
1051 /* The four different data regions on the v850. */
1060 /* A list of names for sections other than the standard two, which are
1061 `in_text' and `in_data'. You need not define this macro on a
1062 system with no other sections (that GCC needs to use). */
1063 #undef EXTRA_SECTIONS
1064 #define EXTRA_SECTIONS in_tdata, in_sdata, in_zdata, in_const, in_ctors, \
1065 in_dtors, in_rozdata, in_rosdata, in_sbss, in_zbss, in_zcommon, in_scommon
1067 /* One or more functions to be defined in `varasm.c'. These
1068 functions should do jobs analogous to those of `text_section' and
1069 `data_section', for your additional sections. Do not define this
1070 macro if you do not define `EXTRA_SECTIONS'. */
1071 #undef EXTRA_SECTION_FUNCTIONS
1073 /* This could be done a lot more cleanly using ANSI C ... */
1074 #define EXTRA_SECTION_FUNCTIONS \
1075 CONST_SECTION_FUNCTION \
1076 CTORS_SECTION_FUNCTION \
1077 DTORS_SECTION_FUNCTION \
1082 if (in_section != in_sdata) \
1084 fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP); \
1085 in_section = in_sdata; \
1090 rosdata_section () \
1092 if (in_section != in_rosdata) \
1094 fprintf (asm_out_file, "%s\n", ROSDATA_SECTION_ASM_OP); \
1095 in_section = in_sdata; \
1102 if (in_section != in_sbss) \
1104 fprintf (asm_out_file, "%s\n", SBSS_SECTION_ASM_OP); \
1105 in_section = in_sbss; \
1112 if (in_section != in_tdata) \
1114 fprintf (asm_out_file, "%s\n", TDATA_SECTION_ASM_OP); \
1115 in_section = in_tdata; \
1122 if (in_section != in_zdata) \
1124 fprintf (asm_out_file, "%s\n", ZDATA_SECTION_ASM_OP); \
1125 in_section = in_zdata; \
1130 rozdata_section () \
1132 if (in_section != in_rozdata) \
1134 fprintf (asm_out_file, "%s\n", ROZDATA_SECTION_ASM_OP); \
1135 in_section = in_rozdata; \
1142 if (in_section != in_zbss) \
1144 fprintf (asm_out_file, "%s\n", ZBSS_SECTION_ASM_OP); \
1145 in_section = in_zbss; \
1149 #define TEXT_SECTION_ASM_OP "\t.section .text"
1150 #define DATA_SECTION_ASM_OP "\t.section .data"
1151 #define BSS_SECTION_ASM_OP "\t.section .bss"
1152 #define SDATA_SECTION_ASM_OP "\t.section .sdata,\"aw\""
1153 #define SBSS_SECTION_ASM_OP "\t.section .sbss,\"aw\""
1154 #define ZDATA_SECTION_ASM_OP "\t.section .zdata,\"aw\""
1155 #define ZBSS_SECTION_ASM_OP "\t.section .zbss,\"aw\""
1156 #define TDATA_SECTION_ASM_OP "\t.section .tdata,\"aw\""
1157 #define ROSDATA_SECTION_ASM_OP "\t.section .rosdata,\"a\""
1158 #define ROZDATA_SECTION_ASM_OP "\t.section .rozdata,\"a\""
1160 #define SCOMMON_ASM_OP ".scomm"
1161 #define ZCOMMON_ASM_OP ".zcomm"
1162 #define TCOMMON_ASM_OP ".tcomm"
1164 /* A C statement or statements to switch to the appropriate section
1165 for output of EXP. You can assume that EXP is either a `VAR_DECL'
1166 node or a constant of some sort. RELOC indicates whether the
1167 initial value of EXP requires link-time relocations. Select the
1168 section by calling `text_section' or one of the alternatives for
1171 Do not define this macro if you put all read-only variables and
1172 constants in the read-only data section (usually the text section). */
1173 #undef SELECT_SECTION
1174 #define SELECT_SECTION(EXP, RELOC) \
1176 if (TREE_CODE (EXP) == VAR_DECL) \
1179 if (!TREE_READONLY (EXP) \
1180 || TREE_SIDE_EFFECTS (EXP) \
1181 || !DECL_INITIAL (EXP) \
1182 || (DECL_INITIAL (EXP) != error_mark_node \
1183 && !TREE_CONSTANT (DECL_INITIAL (EXP)))) \
1188 switch (v850_get_data_area (EXP)) \
1190 case DATA_AREA_ZDA: \
1192 rozdata_section (); \
1197 case DATA_AREA_TDA: \
1201 case DATA_AREA_SDA: \
1203 rosdata_section (); \
1216 else if (TREE_CODE (EXP) == STRING_CST) \
1218 if (! flag_writable_strings) \
1229 /* A C statement or statements to switch to the appropriate section
1230 for output of RTX in mode MODE. You can assume that RTX is some
1231 kind of constant in RTL. The argument MODE is redundant except in
1232 the case of a `const_int' rtx. Select the section by calling
1233 `text_section' or one of the alternatives for other sections.
1235 Do not define this macro if you put all constants in the read-only
1237 /* #define SELECT_RTX_SECTION(MODE, RTX) */
1239 /* Output at beginning/end of assembler file. */
1240 #undef ASM_FILE_START
1241 #define ASM_FILE_START(FILE) asm_file_start(FILE)
1243 #define ASM_COMMENT_START "#"
1245 /* Output to assembler file text saying following lines
1246 may contain character constants, extra white space, comments, etc. */
1248 #define ASM_APP_ON "#APP\n"
1250 /* Output to assembler file text saying following lines
1251 no longer contain unusual constructs. */
1253 #define ASM_APP_OFF "#NO_APP\n"
1255 /* This is how to output an assembler line defining a `double' constant.
1256 It is .double or .float, depending. */
1258 #define ASM_OUTPUT_DOUBLE(FILE, VALUE) \
1259 do { char dstr[30]; \
1260 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", dstr); \
1261 fprintf (FILE, "\t.double %s\n", dstr); \
1265 /* This is how to output an assembler line defining a `float' constant. */
1266 #define ASM_OUTPUT_FLOAT(FILE, VALUE) \
1267 do { char dstr[30]; \
1268 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", dstr); \
1269 fprintf (FILE, "\t.float %s\n", dstr); \
1272 /* This is how to output an assembler line defining an `int' constant. */
1274 #define ASM_OUTPUT_INT(FILE, VALUE) \
1275 ( fprintf (FILE, "\t.long "), \
1276 output_addr_const (FILE, (VALUE)), \
1277 fprintf (FILE, "\n"))
1279 /* Likewise for `char' and `short' constants. */
1281 #define ASM_OUTPUT_SHORT(FILE, VALUE) \
1282 ( fprintf (FILE, "\t.hword "), \
1283 output_addr_const (FILE, (VALUE)), \
1284 fprintf (FILE, "\n"))
1286 #define ASM_OUTPUT_CHAR(FILE, VALUE) \
1287 ( fprintf (FILE, "\t.byte "), \
1288 output_addr_const (FILE, (VALUE)), \
1289 fprintf (FILE, "\n"))
1291 /* This is how to output an assembler line for a numeric constant byte. */
1292 #define ASM_OUTPUT_BYTE(FILE, VALUE) \
1293 fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
1295 /* Define the parentheses used to group arithmetic operations
1296 in assembler code. */
1298 #define ASM_OPEN_PAREN "("
1299 #define ASM_CLOSE_PAREN ")"
1301 /* This says how to output the assembler to define a global
1302 uninitialized but not common symbol. */
1304 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
1305 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
1307 #undef ASM_OUTPUT_ALIGNED_BSS
1308 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
1309 v850_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
1311 /* This says how to output the assembler to define a global
1312 uninitialized, common symbol. */
1313 #undef ASM_OUTPUT_ALIGNED_COMMON
1314 #undef ASM_OUTPUT_COMMON
1315 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
1316 v850_output_common (FILE, DECL, NAME, SIZE, ALIGN)
1318 /* This says how to output the assembler to define a local
1319 uninitialized symbol. */
1320 #undef ASM_OUTPUT_ALIGNED_LOCAL
1321 #undef ASM_OUTPUT_LOCAL
1322 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
1323 v850_output_local (FILE, DECL, NAME, SIZE, ALIGN)
1325 /* This is how to output the definition of a user-level label named NAME,
1326 such as the label on a static function or variable NAME. */
1328 #define ASM_OUTPUT_LABEL(FILE, NAME) \
1329 do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
1331 /* This is how to output a command to make the user-level label named NAME
1332 defined for reference from other files. */
1334 #define ASM_GLOBALIZE_LABEL(FILE, NAME) \
1335 do { fputs ("\t.global ", FILE); assemble_name (FILE, NAME); fputs ("\n", FILE);} while (0)
1337 /* This is how to output a reference to a user-level label named NAME.
1338 `assemble_name' uses this. */
1340 #undef ASM_OUTPUT_LABELREF
1341 #define ASM_OUTPUT_LABELREF(FILE, NAME) \
1344 STRIP_NAME_ENCODING (real_name, (NAME)); \
1345 fprintf (FILE, "_%s", real_name); \
1348 /* Store in OUTPUT a string (made with alloca) containing
1349 an assembler-name for a local static variable named NAME.
1350 LABELNO is an integer which is different for each call. */
1352 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
1353 ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \
1354 sprintf ((OUTPUT), "%s___%d", (NAME), (LABELNO)))
1356 /* This is how we tell the assembler that two symbols have the same value. */
1358 #define ASM_OUTPUT_DEF(FILE,NAME1,NAME2) \
1359 do { assemble_name(FILE, NAME1); \
1360 fputs(" = ", FILE); \
1361 assemble_name(FILE, NAME2); \
1362 fputc('\n', FILE); } while (0)
1365 /* How to refer to registers in assembler output.
1366 This sequence is indexed by compiler's hard-register-number (see above). */
1368 #define REGISTER_NAMES \
1369 { "r0", "r1", "r2", "sp", "gp", "r5", "r6" , "r7", \
1370 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
1371 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
1372 "r24", "r25", "r26", "r27", "r28", "r29", "ep", "r31", \
1375 #define ADDITIONAL_REGISTER_NAMES \
1385 /* Print an instruction operand X on file FILE.
1386 look in v850.c for details */
1388 #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE)
1390 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
1393 /* Print a memory operand whose address is X, on file FILE.
1394 This uses a function in output-vax.c. */
1396 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR)
1398 #define ASM_OUTPUT_REG_PUSH(FILE,REGNO)
1399 #define ASM_OUTPUT_REG_POP(FILE,REGNO)
1401 /* This is how to output an element of a case-vector that is absolute. */
1403 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
1404 asm_fprintf (FILE, "\t%s .L%d\n", \
1405 (TARGET_BIG_SWITCH ? ".long" : ".short"), VALUE)
1407 /* This is how to output an element of a case-vector that is relative. */
1409 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
1410 fprintf (FILE, "\t%s .L%d-.L%d\n", \
1411 (TARGET_BIG_SWITCH ? ".long" : ".short"), \
1414 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
1416 fprintf (FILE, "\t.align %d\n", (LOG))
1418 /* We don't have to worry about dbx compatibility for the v850. */
1419 #define DEFAULT_GDB_EXTENSIONS 1
1421 /* Use stabs debugging info by default. */
1422 #undef PREFERRED_DEBUGGING_TYPE
1423 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
1425 #define DBX_REGISTER_NUMBER(REGNO) REGNO
1427 /* Define to use software floating point emulator for REAL_ARITHMETIC and
1428 decimal <-> binary conversion. */
1429 #define REAL_ARITHMETIC
1431 /* Specify the machine mode that this machine uses
1432 for the index in the tablejump instruction. */
1433 #define CASE_VECTOR_MODE (TARGET_BIG_SWITCH ? SImode : HImode)
1435 /* Define this if the case instruction drops through after the table
1436 when the index is out of range. Don't define it if the case insn
1437 jumps to the default label instead. */
1438 /* #define CASE_DROPS_THROUGH */
1440 /* Define as C expression which evaluates to nonzero if the tablejump
1441 instruction expects the table to contain offsets from the address of the
1443 Do not define this if the table should contain absolute addresses. */
1444 #define CASE_VECTOR_PC_RELATIVE 1
1446 /* The switch instruction requires that the jump table immediately follow
1448 #define JUMP_TABLES_IN_TEXT_SECTION 1
1450 /* svr4.h defines this assuming that 4 byte alignment is required. */
1451 #undef ASM_OUTPUT_BEFORE_CASE_LABEL
1452 #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \
1453 ASM_OUTPUT_ALIGN ((FILE), (TARGET_BIG_SWITCH ? 2 : 1));
1455 #define WORD_REGISTER_OPERATIONS
1457 /* Byte and short loads sign extend the value to a word. */
1458 #define LOAD_EXTEND_OP(MODE) SIGN_EXTEND
1460 /* Specify the tree operation to be used to convert reals to integers. */
1461 #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
1463 /* This flag, if defined, says the same insns that convert to a signed fixnum
1464 also convert validly to an unsigned one. */
1465 #define FIXUNS_TRUNC_LIKE_FIX_TRUNC
1467 /* This is the kind of divide that is easiest to do in the general case. */
1468 #define EASY_DIV_EXPR TRUNC_DIV_EXPR
1470 /* Max number of bytes we can move from memory to memory
1471 in one reasonably fast instruction. */
1474 /* Define if shifts truncate the shift count
1475 which implies one can omit a sign-extension or zero-extension
1476 of a shift count. */
1477 #define SHIFT_COUNT_TRUNCATED 1
1479 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
1480 is done just by pretending it is already truncated. */
1481 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1483 #define STORE_FLAG_VALUE 1
1485 /* Specify the machine mode that pointers have.
1486 After generation of rtl, the compiler makes no further distinction
1487 between pointers and any other objects of this machine mode. */
1488 #define Pmode SImode
1490 /* A function address in a call instruction
1491 is a byte address (for indexing purposes)
1492 so give the MEM rtx a byte's mode. */
1493 #define FUNCTION_MODE QImode
1495 /* A C expression whose value is nonzero if IDENTIFIER with arguments ARGS
1496 is a valid machine specific attribute for DECL.
1497 The attributes in ATTRIBUTES have previously been assigned to DECL. */
1498 #define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, IDENTIFIER, ARGS) \
1499 v850_valid_machine_decl_attribute (DECL, IDENTIFIER, ARGS)
1501 /* A C statement that assigns default attributes to a newly created DECL. */
1502 #define SET_DEFAULT_DECL_ATTRIBUTES(decl, attr) \
1503 v850_set_default_decl_attr (decl)
1505 /* Tell compiler we want to support GHS pragmas */
1506 #define HANDLE_PRAGMA(get, unget, name) v850_handle_pragma (get, unget, name)
1508 enum v850_pragma_state
1511 V850_PS_SHOULD_BE_DONE,
1513 V850_PS_MAYBE_SECTION_NAME,
1514 V850_PS_EXPECTING_EQUALS,
1515 V850_PS_EXPECTING_SECTION_ALIAS,
1519 enum v850_pragma_type
1524 V850_PT_START_SECTION,
1528 /* enum GHS_SECTION_KIND is an enumeration of the kinds of sections that
1529 can appear in the "ghs section" pragma. These names are used to index
1530 into the GHS_default_section_names[] and GHS_current_section_names[]
1531 that are defined in v850.c, and so the ordering of each must remain
1534 These arrays give the default and current names for each kind of
1535 section defined by the GHS pragmas. The current names can be changed
1536 by the "ghs section" pragma. If the current names are null, use
1537 the default names. Note that the two arrays have different types.
1539 For the *normal* section kinds (like .data, .text, etc.) we do not
1540 want to explicitly force the name of these sections, but would rather
1541 let the linker (or at least the back end) choose the name of the
1542 section, UNLESS the user has force a specific name for these section
1543 kinds. To accomplish this set the name in ghs_default_section_names
1546 enum GHS_section_kind
1548 GHS_SECTION_KIND_DEFAULT,
1550 GHS_SECTION_KIND_TEXT,
1551 GHS_SECTION_KIND_DATA,
1552 GHS_SECTION_KIND_RODATA,
1553 GHS_SECTION_KIND_BSS,
1554 GHS_SECTION_KIND_SDATA,
1555 GHS_SECTION_KIND_ROSDATA,
1556 GHS_SECTION_KIND_TDATA,
1557 GHS_SECTION_KIND_ZDATA,
1558 GHS_SECTION_KIND_ROZDATA,
1560 COUNT_OF_GHS_SECTION_KINDS /* must be last */
1563 /* The assembler op to start the file. */
1565 #define FILE_ASM_OP "\t.file\n"
1567 /* Enable the register move pass to improve code. */
1568 #define ENABLE_REGMOVE_PASS
1571 /* Implement ZDA, TDA, and SDA */
1573 #define EP_REGNUM 30 /* ep register number */
1575 #define ENCODE_SECTION_INFO(DECL) \
1577 if ((TREE_STATIC (DECL) || DECL_EXTERNAL (DECL)) \
1578 && TREE_CODE (DECL) == VAR_DECL) \
1579 v850_encode_data_area (DECL); \
1582 #define ZDA_NAME_FLAG_CHAR '@'
1583 #define TDA_NAME_FLAG_CHAR '%'
1584 #define SDA_NAME_FLAG_CHAR '&'
1586 #define ZDA_NAME_P(NAME) (*(NAME) == ZDA_NAME_FLAG_CHAR)
1587 #define TDA_NAME_P(NAME) (*(NAME) == TDA_NAME_FLAG_CHAR)
1588 #define SDA_NAME_P(NAME) (*(NAME) == SDA_NAME_FLAG_CHAR)
1590 #define ENCODED_NAME_P(SYMBOL_NAME) \
1591 (ZDA_NAME_P (SYMBOL_NAME) \
1592 || TDA_NAME_P (SYMBOL_NAME) \
1593 || SDA_NAME_P (SYMBOL_NAME))
1595 #define STRIP_NAME_ENCODING(VAR,SYMBOL_NAME) \
1596 (VAR) = (SYMBOL_NAME) + (ENCODED_NAME_P (SYMBOL_NAME) || *(SYMBOL_NAME) == '*')
1598 /* Define this if you have defined special-purpose predicates in the
1599 file `MACHINE.c'. This macro is called within an initializer of an
1600 array of structures. The first field in the structure is the name
1601 of a predicate and the second field is an array of rtl codes. For
1602 each predicate, list all rtl codes that can be in expressions
1603 matched by the predicate. The list should have a trailing comma. */
1605 #define PREDICATE_CODES \
1606 { "ep_memory_operand", { MEM }}, \
1607 { "reg_or_0_operand", { REG, SUBREG, CONST_INT, CONST_DOUBLE }}, \
1608 { "reg_or_int5_operand", { REG, SUBREG, CONST_INT }}, \
1609 { "call_address_operand", { REG, SYMBOL_REF }}, \
1610 { "movsi_source_operand", { LABEL_REF, SYMBOL_REF, CONST_INT, \
1611 CONST_DOUBLE, CONST, HIGH, MEM, \
1613 { "special_symbolref_operand", { SYMBOL_REF }}, \
1614 { "power_of_two_operand", { CONST_INT }}, \
1615 { "pattern_is_ok_for_prologue", { PARALLEL }}, \
1616 { "pattern_is_ok_for_epilogue", { PARALLEL }}, \
1617 { "register_is_ok_for_epilogue",{ REG }}, \
1618 { "not_power_of_two_operand", { CONST_INT }},
1620 /* Note, due to dependency and search path conflicts, prototypes
1621 involving the FILE, rtx or tree types cannot be included here.
1622 They are included at the start of v850.c */
1624 extern void asm_file_start ();
1625 extern void print_operand ();
1626 extern void print_operand_address ();
1627 extern int function_arg_partial_nregs ();
1628 extern int const_costs ();
1629 extern char * output_move_double ();
1630 extern char * output_move_single ();
1631 extern int ep_memory_operand ();
1632 extern int reg_or_0_operand ();
1633 extern int reg_or_int5_operand ();
1634 extern int call_address_operand ();
1635 extern int movsi_source_operand ();
1636 extern int power_of_two_operand ();
1637 extern int not_power_of_two_operand ();
1638 extern int special_symbolref_operand ();
1639 extern void v850_reorg ();
1640 extern void notice_update_cc ();
1641 extern int v850_valid_machine_decl_attribute ();
1642 extern int v850_interrupt_function_p ();
1643 extern int pattern_is_ok_for_prologue ();
1644 extern int pattern_is_ok_for_epilogue ();
1645 extern int register_is_ok_for_epilogue ();
1646 extern char * construct_save_jarl ();
1647 extern char * construct_restore_jr ();
1649 extern void override_options PROTO ((void));
1650 extern int compute_register_save_size PROTO ((long *));
1651 extern int compute_frame_size PROTO ((int, long *));
1652 extern void expand_prologue PROTO ((void));
1653 extern void expand_epilogue PROTO ((void));
1655 extern void v850_output_aligned_bss ();
1656 extern void v850_output_common ();
1657 extern void v850_output_local ();
1658 extern void sdata_section PROTO ((void));
1659 extern void rosdata_section PROTO ((void));
1660 extern void sbss_section PROTO ((void));
1661 extern void tdata_section PROTO ((void));
1662 extern void zdata_section PROTO ((void));
1663 extern void rozdata_section PROTO ((void));
1664 extern void zbss_section PROTO ((void));
1665 extern int v850_handle_pragma PROTO ((int (*)(void), void (*)(int), char *));
1666 extern void v850_encode_data_area ();
1667 extern void v850_set_default_decl_attr ();
1668 extern v850_data_area v850_get_data_area ();