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 #ifndef STRICT_ALIGNMENT 1
305 #define STRICT_ALIGNMENT 1
308 /* Define this as 1 if `char' should by default be signed; else as 0.
310 On the NEC V850, loads do sign extension, so make this default. */
311 #define DEFAULT_SIGNED_CHAR 1
313 /* Define results of standard character escape sequences. */
314 #define TARGET_BELL 007
315 #define TARGET_BS 010
316 #define TARGET_TAB 011
317 #define TARGET_NEWLINE 012
318 #define TARGET_VT 013
319 #define TARGET_FF 014
320 #define TARGET_CR 015
322 /* Standard register usage. */
324 /* Number of actual hardware registers.
325 The hardware registers are assigned numbers for the compiler
326 from 0 to just below FIRST_PSEUDO_REGISTER.
328 All registers that the compiler knows about must be given numbers,
329 even those that are not normally considered general registers. */
331 #define FIRST_PSEUDO_REGISTER 34
333 /* 1 for registers that have pervasive standard uses
334 and are not available for the register allocator. */
336 #define FIXED_REGISTERS \
337 { 1, 1, 0, 1, 1, 0, 0, 0, \
338 0, 0, 0, 0, 0, 0, 0, 0, \
339 0, 0, 0, 0, 0, 0, 0, 0, \
340 0, 0, 0, 0, 0, 0, 1, 0, \
343 /* 1 for registers not available across function calls.
344 These must include the FIXED_REGISTERS and also any
345 registers that can be used without being saved.
346 The latter must include the registers where values are returned
347 and the register where structure-value addresses are passed.
348 Aside from that, you can include as many other registers as you
351 #define CALL_USED_REGISTERS \
352 { 1, 1, 0, 1, 1, 1, 1, 1, \
353 1, 1, 1, 1, 1, 1, 1, 1, \
354 1, 1, 1, 1, 0, 0, 0, 0, \
355 0, 0, 0, 0, 0, 0, 1, 1, \
358 /* List the order in which to allocate registers. Each register must be
359 listed once, even those in FIXED_REGISTERS.
361 On the 850, we make the return registers first, then all of the volatile
362 registers, then the saved registers in reverse order to better save the
363 registers with an out of line function, and finally the fixed
366 #define REG_ALLOC_ORDER \
368 10, 11, /* return registers */ \
369 12, 13, 14, 15, 16, 17, 18, 19, /* scratch registers */ \
370 6, 7, 8, 9, 31, /* argument registers */ \
371 29, 28, 27, 26, 25, 24, 23, 22, /* saved registers */ \
373 0, 1, 3, 4, 5, 30, 32, 33 /* fixed registers */ \
376 /* Return number of consecutive hard regs needed starting at reg REGNO
377 to hold something of mode MODE.
379 This is ordinarily the length in words of a value of mode MODE
380 but can be less for certain modes in special long registers. */
382 #define HARD_REGNO_NREGS(REGNO, MODE) \
383 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
385 /* Value is 1 if hard register REGNO can hold a value of machine-mode
388 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
389 ((((REGNO) & 1) == 0) || (GET_MODE_SIZE (MODE) <= 4))
391 /* Value is 1 if it is a good idea to tie two pseudo registers
392 when one has mode MODE1 and one has mode MODE2.
393 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
394 for any hard reg, then this must be 0 for correct output. */
395 #define MODES_TIEABLE_P(MODE1, MODE2) \
396 (MODE1 == MODE2 || GET_MODE_SIZE (MODE1) <= 4 && GET_MODE_SIZE (MODE2) <= 4)
399 /* Define the classes of registers for register constraints in the
400 machine description. Also define ranges of constants.
402 One of the classes must always be named ALL_REGS and include all hard regs.
403 If there is more than one class, another class must be named NO_REGS
404 and contain no registers.
406 The name GENERAL_REGS must be the name of a class (or an alias for
407 another name such as ALL_REGS). This is the class of registers
408 that is allowed by "g" or "r" in a register constraint.
409 Also, registers outside this class are allocated only when
410 instructions express preferences for them.
412 The classes must be numbered in nondecreasing order; that is,
413 a larger-numbered class must never be contained completely
414 in a smaller-numbered class.
416 For any two classes, it is very desirable that there be another
417 class that represents their union. */
421 NO_REGS, GENERAL_REGS, ALL_REGS, LIM_REG_CLASSES
424 #define N_REG_CLASSES (int) LIM_REG_CLASSES
426 /* Give names of register classes as strings for dump file. */
428 #define REG_CLASS_NAMES \
429 { "NO_REGS", "GENERAL_REGS", "ALL_REGS", "LIM_REGS" }
431 /* Define which registers fit in which classes.
432 This is an initializer for a vector of HARD_REG_SET
433 of length N_REG_CLASSES. */
435 #define REG_CLASS_CONTENTS \
436 { 0x00000000, /* No regs */ \
437 0xffffffff, /* GENERAL_REGS */ \
438 0xffffffff, /* ALL_REGS */ \
441 /* The same information, inverted:
442 Return the class number of the smallest class containing
443 reg number REGNO. This could be a conditional expression
444 or could index an array. */
446 #define REGNO_REG_CLASS(REGNO) GENERAL_REGS
448 /* The class value for index registers, and the one for base regs. */
450 #define INDEX_REG_CLASS NO_REGS
451 #define BASE_REG_CLASS GENERAL_REGS
453 /* Get reg_class from a letter such as appears in the machine description. */
455 #define REG_CLASS_FROM_LETTER(C) (NO_REGS)
457 /* Macros to check register numbers against specific register classes. */
459 /* These assume that REGNO is a hard or pseudo reg number.
460 They give nonzero only if REGNO is a hard reg of the suitable class
461 or a pseudo reg currently allocated to a suitable hard reg.
462 Since they use reg_renumber, they are safe only once reg_renumber
463 has been allocated, which happens in local-alloc.c. */
465 #define REGNO_OK_FOR_BASE_P(regno) \
466 ((regno) < FIRST_PSEUDO_REGISTER || reg_renumber[regno] >= 0)
468 #define REGNO_OK_FOR_INDEX_P(regno) 0
470 /* Given an rtx X being reloaded into a reg required to be
471 in class CLASS, return the class of reg to actually use.
472 In general this is just CLASS; but on some machines
473 in some cases it is preferable to use a more restrictive class. */
475 #define PREFERRED_RELOAD_CLASS(X,CLASS) (CLASS)
477 /* Return the maximum number of consecutive registers
478 needed to represent mode MODE in a register of class CLASS. */
480 #define CLASS_MAX_NREGS(CLASS, MODE) \
481 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
483 /* The letters I, J, K, L, M, N, O, P in a register constraint string
484 can be used to stand for particular ranges of immediate operands.
485 This macro defines what the ranges are.
486 C is the letter, and VALUE is a constant value.
487 Return 1 if VALUE is in the range specified by C. */
489 #define INT_7_BITS(VALUE) ((unsigned) (VALUE) + 0x40 < 0x80)
490 #define INT_8_BITS(VALUE) ((unsigned) (VALUE) + 0x80 < 0x100)
492 #define CONST_OK_FOR_I(VALUE) ((VALUE) == 0)
493 /* 5 bit signed immediate */
494 #define CONST_OK_FOR_J(VALUE) ((unsigned) (VALUE) + 0x10 < 0x20)
495 /* 16 bit signed immediate */
496 #define CONST_OK_FOR_K(VALUE) ((unsigned) (VALUE) + 0x8000 < 0x10000)
497 /* valid constant for movhi instruction. */
498 #define CONST_OK_FOR_L(VALUE) \
499 (((unsigned) ((int) (VALUE) >> 16) + 0x8000 < 0x10000) \
500 && CONST_OK_FOR_I ((VALUE & 0xffff)))
501 /* 16 bit unsigned immediate */
502 #define CONST_OK_FOR_M(VALUE) ((unsigned)(VALUE) < 0x10000)
503 /* 5 bit unsigned immediate in shift instructions */
504 #define CONST_OK_FOR_N(VALUE) ((unsigned) (VALUE) <= 31)
506 #define CONST_OK_FOR_O(VALUE) 0
507 #define CONST_OK_FOR_P(VALUE) 0
510 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
511 ((C) == 'I' ? CONST_OK_FOR_I (VALUE) : \
512 (C) == 'J' ? CONST_OK_FOR_J (VALUE) : \
513 (C) == 'K' ? CONST_OK_FOR_K (VALUE) : \
514 (C) == 'L' ? CONST_OK_FOR_L (VALUE) : \
515 (C) == 'M' ? CONST_OK_FOR_M (VALUE) : \
516 (C) == 'N' ? CONST_OK_FOR_N (VALUE) : \
517 (C) == 'O' ? CONST_OK_FOR_O (VALUE) : \
518 (C) == 'P' ? CONST_OK_FOR_P (VALUE) : \
521 /* Similar, but for floating constants, and defining letters G and H.
522 Here VALUE is the CONST_DOUBLE rtx itself.
524 `G' is a zero of some form. */
526 #define CONST_DOUBLE_OK_FOR_G(VALUE) \
527 ((GET_MODE_CLASS (GET_MODE (VALUE)) == MODE_FLOAT \
528 && (VALUE) == CONST0_RTX (GET_MODE (VALUE))) \
529 || (GET_MODE_CLASS (GET_MODE (VALUE)) == MODE_INT \
530 && CONST_DOUBLE_LOW (VALUE) == 0 \
531 && CONST_DOUBLE_HIGH (VALUE) == 0))
533 #define CONST_DOUBLE_OK_FOR_H(VALUE) 0
535 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
536 ((C) == 'G' ? CONST_DOUBLE_OK_FOR_G (VALUE) \
537 : (C) == 'H' ? CONST_DOUBLE_OK_FOR_H (VALUE) \
541 /* Stack layout; function entry, exit and calling. */
543 /* Define this if pushing a word on the stack
544 makes the stack pointer a smaller address. */
546 #define STACK_GROWS_DOWNWARD
548 /* Define this if the nominal address of the stack frame
549 is at the high-address end of the local variables;
550 that is, each additional local variable allocated
551 goes at a more negative offset in the frame. */
553 #define FRAME_GROWS_DOWNWARD
555 /* Offset within stack frame to start allocating local variables at.
556 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
557 first local allocated. Otherwise, it is the offset to the BEGINNING
558 of the first local allocated. */
560 #define STARTING_FRAME_OFFSET 0
562 /* Offset of first parameter from the argument pointer register value. */
563 /* Is equal to the size of the saved fp + pc, even if an fp isn't
564 saved since the value is used before we know. */
566 #define FIRST_PARM_OFFSET(FNDECL) 0
568 /* Specify the registers used for certain standard purposes.
569 The values of these macros are register numbers. */
571 /* Register to use for pushing function arguments. */
572 #define STACK_POINTER_REGNUM 3
574 /* Base register for access to local variables of the function. */
575 #define FRAME_POINTER_REGNUM 32
577 /* Register containing return address from latest function call. */
578 #define LINK_POINTER_REGNUM 31
580 /* On some machines the offset between the frame pointer and starting
581 offset of the automatic variables is not known until after register
582 allocation has been done (for example, because the saved registers
583 are between these two locations). On those machines, define
584 `FRAME_POINTER_REGNUM' the number of a special, fixed register to
585 be used internally until the offset is known, and define
586 `HARD_FRAME_POINTER_REGNUM' to be actual the hard register number
587 used for the frame pointer.
589 You should define this macro only in the very rare circumstances
590 when it is not possible to calculate the offset between the frame
591 pointer and the automatic variables until after register
592 allocation has been completed. When this macro is defined, you
593 must also indicate in your definition of `ELIMINABLE_REGS' how to
594 eliminate `FRAME_POINTER_REGNUM' into either
595 `HARD_FRAME_POINTER_REGNUM' or `STACK_POINTER_REGNUM'.
597 Do not define this macro if it would be the same as
598 `FRAME_POINTER_REGNUM'. */
599 #undef HARD_FRAME_POINTER_REGNUM
600 #define HARD_FRAME_POINTER_REGNUM 29
602 /* Base register for access to arguments of the function. */
603 #define ARG_POINTER_REGNUM 33
605 /* Register in which static-chain is passed to a function. */
606 #define STATIC_CHAIN_REGNUM 20
608 /* Value should be nonzero if functions must have frame pointers.
609 Zero means the frame pointer need not be set up (and parms
610 may be accessed via the stack pointer) in functions that seem suitable.
611 This is computed in `reload', in reload1.c. */
612 #define FRAME_POINTER_REQUIRED 0
614 /* If defined, this macro specifies a table of register pairs used to
615 eliminate unneeded registers that point into the stack frame. If
616 it is not defined, the only elimination attempted by the compiler
617 is to replace references to the frame pointer with references to
620 The definition of this macro is a list of structure
621 initializations, each of which specifies an original and
622 replacement register.
624 On some machines, the position of the argument pointer is not
625 known until the compilation is completed. In such a case, a
626 separate hard register must be used for the argument pointer.
627 This register can be eliminated by replacing it with either the
628 frame pointer or the argument pointer, depending on whether or not
629 the frame pointer has been eliminated.
631 In this case, you might specify:
632 #define ELIMINABLE_REGS \
633 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
634 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
635 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
637 Note that the elimination of the argument pointer with the stack
638 pointer is specified first since that is the preferred elimination. */
640 #define ELIMINABLE_REGS \
641 {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
642 { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM }, \
643 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
644 { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM }} \
646 /* A C expression that returns non-zero if the compiler is allowed to
647 try to replace register number FROM-REG with register number
648 TO-REG. This macro need only be defined if `ELIMINABLE_REGS' is
649 defined, and will usually be the constant 1, since most of the
650 cases preventing register elimination are things that the compiler
651 already knows about. */
653 #define CAN_ELIMINATE(FROM, TO) \
654 ((TO) == STACK_POINTER_REGNUM ? ! frame_pointer_needed : 1)
656 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It
657 specifies the initial difference between the specified pair of
658 registers. This macro must be defined if `ELIMINABLE_REGS' is
661 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
663 if ((FROM) == FRAME_POINTER_REGNUM) \
664 (OFFSET) = get_frame_size () + current_function_outgoing_args_size; \
665 else if ((FROM) == ARG_POINTER_REGNUM) \
666 (OFFSET) = compute_frame_size (get_frame_size (), (long *)0); \
671 /* A guess for the V850. */
672 #define PROMOTE_PROTOTYPES 1
674 /* Keep the stack pointer constant throughout the function. */
675 #define ACCUMULATE_OUTGOING_ARGS
677 /* Value is the number of bytes of arguments automatically
678 popped when returning from a subroutine call.
679 FUNDECL is the declaration node of the function (as a tree),
680 FUNTYPE is the data type of the function (as a tree),
681 or for a library call it is an identifier node for the subroutine name.
682 SIZE is the number of bytes of arguments passed on the stack. */
684 #define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) 0
687 /* Define a data type for recording info about an argument list
688 during the scan of that argument list. This data type should
689 hold all necessary information about the function itself
690 and about the args processed so far, enough to enable macros
691 such as FUNCTION_ARG to determine where the next arg should go. */
693 #define CUMULATIVE_ARGS struct cum_arg
694 struct cum_arg { int nbytes; };
696 /* Define where to put the arguments to a function.
697 Value is zero to push the argument on the stack,
698 or a hard register in which to store the argument.
700 MODE is the argument's machine mode.
701 TYPE is the data type of the argument (as a tree).
702 This is null for libcalls where that information may
704 CUM is a variable of type CUMULATIVE_ARGS which gives info about
705 the preceding args and about the function being called.
706 NAMED is nonzero if this argument is a named parameter
707 (otherwise it is an extra parameter matching an ellipsis). */
709 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
710 function_arg (&CUM, MODE, TYPE, NAMED)
712 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
713 function_arg_partial_nregs (&CUM, MODE, TYPE, NAMED)
715 /* Initialize a variable CUM of type CUMULATIVE_ARGS
716 for a call to a function whose data type is FNTYPE.
717 For a library call, FNTYPE is 0. */
719 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT) \
722 /* Update the data in CUM to advance over an argument
723 of mode MODE and data type TYPE.
724 (TYPE is null for libcalls where that information may not be available.) */
726 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
727 ((CUM).nbytes += ((MODE) != BLKmode \
728 ? (GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) & -UNITS_PER_WORD \
729 : (int_size_in_bytes (TYPE) + UNITS_PER_WORD - 1) & -UNITS_PER_WORD))
731 /* When a parameter is passed in a register, stack space is still
733 #define REG_PARM_STACK_SPACE(DECL) (!TARGET_GHS ? 16 : 0)
735 /* Define this if the above stack space is to be considered part of the
736 space allocated by the caller. */
737 #define OUTGOING_REG_PARM_STACK_SPACE
739 extern int current_function_anonymous_args;
740 /* Do any setup necessary for varargs/stdargs functions. */
741 #define SETUP_INCOMING_VARARGS(CUM, MODE, TYPE, PAS, SECOND) \
742 current_function_anonymous_args = (!TARGET_GHS ? 1 : 0);
744 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
745 ((TYPE) && int_size_in_bytes (TYPE) > 8)
747 #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) \
748 ((TYPE) && int_size_in_bytes (TYPE) > 8)
750 /* 1 if N is a possible register number for function argument passing. */
752 #define FUNCTION_ARG_REGNO_P(N) (N >= 6 && N <= 9)
754 /* Define how to find the value returned by a function.
755 VALTYPE is the data type of the value (as a tree).
756 If the precise function being called is known, FUNC is its FUNCTION_DECL;
757 otherwise, FUNC is 0. */
759 #define FUNCTION_VALUE(VALTYPE, FUNC) \
760 gen_rtx (REG, TYPE_MODE (VALTYPE), 10)
762 /* Define how to find the value returned by a library function
763 assuming the value has mode MODE. */
765 #define LIBCALL_VALUE(MODE) \
766 gen_rtx (REG, MODE, 10)
768 /* 1 if N is a possible register number for a function value. */
770 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 10)
772 /* Return values > 8 bytes in length in memory. */
773 #define DEFAULT_PCC_STRUCT_RETURN 0
774 #define RETURN_IN_MEMORY(TYPE) \
775 (int_size_in_bytes (TYPE) > 8 || TYPE_MODE (TYPE) == BLKmode)
777 /* Register in which address to store a structure value
778 is passed to a function. On the V850 it's passed as
779 the first parameter. */
781 #define STRUCT_VALUE 0
783 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
784 the stack pointer does not matter. The value is tested only in
785 functions that have frame pointers.
786 No definition is equivalent to always zero. */
788 #define EXIT_IGNORE_STACK 1
790 /* Output assembler code to FILE to increment profiler label # LABELNO
791 for profiling a function entry. */
793 #define FUNCTION_PROFILER(FILE, LABELNO) ;
795 #define TRAMPOLINE_TEMPLATE(FILE) \
797 fprintf (FILE, "\tjarl .+4,r12\n"); \
798 fprintf (FILE, "\tld.w 12[r12],r5\n"); \
799 fprintf (FILE, "\tld.w 16[r12],r12\n"); \
800 fprintf (FILE, "\tjmp [r12]\n"); \
801 fprintf (FILE, "\tnop\n"); \
802 fprintf (FILE, "\t.long 0\n"); \
803 fprintf (FILE, "\t.long 0\n"); \
806 /* Length in units of the trampoline for entering a nested function. */
808 #define TRAMPOLINE_SIZE 24
810 /* Emit RTL insns to initialize the variable parts of a trampoline.
811 FNADDR is an RTX for the address of the function's pure code.
812 CXT is an RTX for the static chain value for the function. */
814 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
816 emit_move_insn (gen_rtx (MEM, SImode, plus_constant ((TRAMP), 16)), \
818 emit_move_insn (gen_rtx (MEM, SImode, plus_constant ((TRAMP), 20)), \
822 /* Addressing modes, and classification of registers for them. */
825 /* 1 if X is an rtx for a constant that is a valid address. */
827 /* ??? This seems too exclusive. May get better code by accepting more
828 possibilities here, in particular, should accept ZDA_NAME SYMBOL_REFs. */
830 #define CONSTANT_ADDRESS_P(X) \
831 (GET_CODE (X) == CONST_INT \
832 && CONST_OK_FOR_K (INTVAL (X)))
834 /* Maximum number of registers that can appear in a valid memory address. */
836 #define MAX_REGS_PER_ADDRESS 1
838 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
839 and check its validity for a certain class.
840 We have two alternate definitions for each of them.
841 The usual definition accepts all pseudo regs; the other rejects
842 them unless they have been allocated suitable hard regs.
843 The symbol REG_OK_STRICT causes the latter definition to be used.
845 Most source files want to accept pseudo regs in the hope that
846 they will get allocated to the class that the insn wants them to be in.
847 Source files for reload pass need to be strict.
848 After reload, it makes no difference, since pseudo regs have
849 been eliminated by then. */
851 #ifndef REG_OK_STRICT
853 /* Nonzero if X is a hard reg that can be used as an index
854 or if it is a pseudo reg. */
855 #define REG_OK_FOR_INDEX_P(X) 0
856 /* Nonzero if X is a hard reg that can be used as a base reg
857 or if it is a pseudo reg. */
858 #define REG_OK_FOR_BASE_P(X) 1
859 #define REG_OK_FOR_INDEX_P_STRICT(X) 0
860 #define REG_OK_FOR_BASE_P_STRICT(X) REGNO_OK_FOR_BASE_P (REGNO (X))
865 /* Nonzero if X is a hard reg that can be used as an index. */
866 #define REG_OK_FOR_INDEX_P(X) 0
867 /* Nonzero if X is a hard reg that can be used as a base reg. */
868 #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
873 /* A C expression that defines the optional machine-dependent
874 constraint letters that can be used to segregate specific types of
875 operands, usually memory references, for the target machine.
876 Normally this macro will not be defined. If it is required for a
877 particular target machine, it should return 1 if VALUE corresponds
878 to the operand type represented by the constraint letter C. If C
879 is not defined as an extra constraint, the value returned should
880 be 0 regardless of VALUE.
882 For example, on the ROMP, load instructions cannot have their
883 output in r0 if the memory reference contains a symbolic address.
884 Constraint letter `Q' is defined as representing a memory address
885 that does *not* contain a symbolic address. An alternative is
886 specified with a `Q' constraint on the input and `r' on the
887 output. The next alternative specifies `m' on the input and a
888 register class that does not include r0 on the output. */
890 #define EXTRA_CONSTRAINT(OP, C) \
891 ((C) == 'Q' ? ep_memory_operand (OP, GET_MODE (OP)) \
892 : (C) == 'R' ? special_symbolref_operand (OP, VOIDmode) \
893 : (C) == 'S' ? (GET_CODE (OP) == SYMBOL_REF && ! ZDA_NAME_P (XSTR (OP, 0))) \
895 : (C) == 'U' ? ((GET_CODE (OP) == SYMBOL_REF && ZDA_NAME_P (XSTR (OP, 0))) \
896 || (GET_CODE (OP) == CONST \
897 && GET_CODE (XEXP (OP, 0)) == PLUS \
898 && GET_CODE (XEXP (XEXP (OP, 0), 0)) == SYMBOL_REF \
899 && ZDA_NAME_P (XSTR (XEXP (XEXP (OP, 0), 0), 0)))) \
902 /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
903 that is a valid memory address for an instruction.
904 The MODE argument is the machine mode for the MEM expression
905 that wants to use this address.
907 The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS,
908 except for CONSTANT_ADDRESS_P which is actually
909 machine-independent. */
911 /* Accept either REG or SUBREG where a register is valid. */
913 #define RTX_OK_FOR_BASE_P(X) \
914 ((REG_P (X) && REG_OK_FOR_BASE_P (X)) \
915 || (GET_CODE (X) == SUBREG && REG_P (SUBREG_REG (X)) \
916 && REG_OK_FOR_BASE_P (SUBREG_REG (X))))
918 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
920 if (RTX_OK_FOR_BASE_P (X)) goto ADDR; \
921 if (CONSTANT_ADDRESS_P (X) \
922 && (MODE == QImode || INTVAL (X) % 2 == 0)) \
924 if (GET_CODE (X) == LO_SUM \
925 && GET_CODE (XEXP (X, 0)) == REG \
926 && REG_OK_FOR_BASE_P (XEXP (X, 0)) \
927 && CONSTANT_P (XEXP (X, 1)) \
928 && (GET_CODE (XEXP (X, 1)) != CONST_INT \
929 || ((MODE == QImode || INTVAL (XEXP (X, 1)) % 2 == 0) \
930 && CONST_OK_FOR_K (INTVAL (XEXP (X, 1))))) \
931 && GET_MODE_SIZE (MODE) <= GET_MODE_SIZE (word_mode)) \
933 if (special_symbolref_operand (X, MODE) \
934 && (GET_MODE_SIZE (MODE) <= GET_MODE_SIZE (word_mode))) \
936 if (GET_CODE (X) == PLUS \
937 && CONSTANT_ADDRESS_P (XEXP (X, 1)) \
938 && (MODE == QImode || INTVAL (XEXP (X, 1)) % 2 == 0) \
939 && RTX_OK_FOR_BASE_P (XEXP (X, 0))) goto ADDR; \
943 /* Try machine-dependent ways of modifying an illegitimate address
944 to be legitimate. If we find one, return the new, valid address.
945 This macro is used in only one place: `memory_address' in explow.c.
947 OLDX is the address as it was before break_out_memory_refs was called.
948 In some cases it is useful to look at this to decide what needs to be done.
950 MODE and WIN are passed so that this macro can use
951 GO_IF_LEGITIMATE_ADDRESS.
953 It is always safe for this macro to do nothing. It exists to recognize
954 opportunities to optimize the output. */
956 #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) {}
958 /* Go to LABEL if ADDR (a legitimate address expression)
959 has an effect that depends on the machine mode it is used for. */
961 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) {}
963 /* Nonzero if the constant value X is a legitimate general operand.
964 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */
966 #define LEGITIMATE_CONSTANT_P(X) \
967 (GET_CODE (X) == CONST_DOUBLE \
968 || !(GET_CODE (X) == CONST \
969 && GET_CODE (XEXP (X, 0)) == PLUS \
970 && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF \
971 && GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT \
972 && ! CONST_OK_FOR_K (INTVAL (XEXP (XEXP (X, 0), 1)))))
974 /* In rare cases, correct code generation requires extra machine
975 dependent processing between the second jump optimization pass and
976 delayed branch scheduling. On those machines, define this macro
977 as a C statement to act on the code starting at INSN. */
979 #define MACHINE_DEPENDENT_REORG(INSN) v850_reorg (INSN)
982 /* Tell final.c how to eliminate redundant test instructions. */
984 /* Here we define machine-dependent flags and fields in cc_status
985 (see `conditions.h'). No extra ones are needed for the vax. */
987 /* Store in cc_status the expressions
988 that the condition codes will describe
989 after execution of an instruction whose pattern is EXP.
990 Do not alter them if the instruction would not alter the cc's. */
992 #define CC_OVERFLOW_UNUSABLE 0x200
993 #define CC_NO_CARRY CC_NO_OVERFLOW
994 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
996 /* A part of a C `switch' statement that describes the relative costs
997 of constant RTL expressions. It must contain `case' labels for
998 expression codes `const_int', `const', `symbol_ref', `label_ref'
999 and `const_double'. Each case must ultimately reach a `return'
1000 statement to return the relative cost of the use of that kind of
1001 constant value in an expression. The cost may depend on the
1002 precise value of the constant, which is available for examination
1003 in X, and the rtx code of the expression in which it is contained,
1004 found in OUTER_CODE.
1006 CODE is the expression code--redundant, since it can be obtained
1007 with `GET_CODE (X)'. */
1009 #define CONST_COSTS(RTX,CODE,OUTER_CODE) \
1011 case CONST_DOUBLE: \
1016 int _zxy = const_costs(RTX, CODE); \
1017 return (_zxy) ? COSTS_N_INSNS (_zxy) : 0; \
1020 /* A crude cut at RTX_COSTS for the V850. */
1022 /* Provide the costs of a rtl expression. This is in the body of a
1025 There aren't DImode MOD, DIV or MULT operations, so call them
1026 very expensive. Everything else is pretty much a constant cost. */
1028 #define RTX_COSTS(RTX,CODE,OUTER_CODE) \
1035 /* All addressing modes have the same cost on the V850 series. */
1036 #define ADDRESS_COST(ADDR) 1
1038 /* Nonzero if access to memory by bytes or half words is no faster
1039 than accessing full words. */
1040 #define SLOW_BYTE_ACCESS 1
1042 /* Define this if zero-extension is slow (more than one real instruction). */
1043 #define SLOW_ZERO_EXTEND
1045 /* According expr.c, a value of around 6 should minimize code size, and
1046 for the V850 series, that's our primary concern. */
1047 #define MOVE_RATIO 6
1049 /* Indirect calls are expensive, never turn a direct call
1050 into an indirect call. */
1051 #define NO_FUNCTION_CSE
1053 /* The four different data regions on the v850. */
1062 /* A list of names for sections other than the standard two, which are
1063 `in_text' and `in_data'. You need not define this macro on a
1064 system with no other sections (that GCC needs to use). */
1065 #undef EXTRA_SECTIONS
1066 #define EXTRA_SECTIONS in_tdata, in_sdata, in_zdata, in_const, in_ctors, \
1067 in_dtors, in_rozdata, in_rosdata, in_sbss, in_zbss, in_zcommon, in_scommon
1069 /* One or more functions to be defined in `varasm.c'. These
1070 functions should do jobs analogous to those of `text_section' and
1071 `data_section', for your additional sections. Do not define this
1072 macro if you do not define `EXTRA_SECTIONS'. */
1073 #undef EXTRA_SECTION_FUNCTIONS
1075 /* This could be done a lot more cleanly using ANSI C ... */
1076 #define EXTRA_SECTION_FUNCTIONS \
1077 CONST_SECTION_FUNCTION \
1078 CTORS_SECTION_FUNCTION \
1079 DTORS_SECTION_FUNCTION \
1084 if (in_section != in_sdata) \
1086 fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP); \
1087 in_section = in_sdata; \
1092 rosdata_section () \
1094 if (in_section != in_rosdata) \
1096 fprintf (asm_out_file, "%s\n", ROSDATA_SECTION_ASM_OP); \
1097 in_section = in_sdata; \
1104 if (in_section != in_sbss) \
1106 fprintf (asm_out_file, "%s\n", SBSS_SECTION_ASM_OP); \
1107 in_section = in_sbss; \
1114 if (in_section != in_tdata) \
1116 fprintf (asm_out_file, "%s\n", TDATA_SECTION_ASM_OP); \
1117 in_section = in_tdata; \
1124 if (in_section != in_zdata) \
1126 fprintf (asm_out_file, "%s\n", ZDATA_SECTION_ASM_OP); \
1127 in_section = in_zdata; \
1132 rozdata_section () \
1134 if (in_section != in_rozdata) \
1136 fprintf (asm_out_file, "%s\n", ROZDATA_SECTION_ASM_OP); \
1137 in_section = in_rozdata; \
1144 if (in_section != in_zbss) \
1146 fprintf (asm_out_file, "%s\n", ZBSS_SECTION_ASM_OP); \
1147 in_section = in_zbss; \
1151 #define TEXT_SECTION_ASM_OP "\t.section .text"
1152 #define DATA_SECTION_ASM_OP "\t.section .data"
1153 #define BSS_SECTION_ASM_OP "\t.section .bss"
1154 #define SDATA_SECTION_ASM_OP "\t.section .sdata,\"aw\""
1155 #define SBSS_SECTION_ASM_OP "\t.section .sbss,\"aw\""
1156 #define ZDATA_SECTION_ASM_OP "\t.section .zdata,\"aw\""
1157 #define ZBSS_SECTION_ASM_OP "\t.section .zbss,\"aw\""
1158 #define TDATA_SECTION_ASM_OP "\t.section .tdata,\"aw\""
1159 #define ROSDATA_SECTION_ASM_OP "\t.section .rosdata,\"a\""
1160 #define ROZDATA_SECTION_ASM_OP "\t.section .rozdata,\"a\""
1162 #define SCOMMON_ASM_OP ".scomm"
1163 #define ZCOMMON_ASM_OP ".zcomm"
1164 #define TCOMMON_ASM_OP ".tcomm"
1166 /* A C statement or statements to switch to the appropriate section
1167 for output of EXP. You can assume that EXP is either a `VAR_DECL'
1168 node or a constant of some sort. RELOC indicates whether the
1169 initial value of EXP requires link-time relocations. Select the
1170 section by calling `text_section' or one of the alternatives for
1173 Do not define this macro if you put all read-only variables and
1174 constants in the read-only data section (usually the text section). */
1175 #undef SELECT_SECTION
1176 #define SELECT_SECTION(EXP, RELOC) \
1178 if (TREE_CODE (EXP) == VAR_DECL) \
1181 if (!TREE_READONLY (EXP) \
1182 || TREE_SIDE_EFFECTS (EXP) \
1183 || !DECL_INITIAL (EXP) \
1184 || (DECL_INITIAL (EXP) != error_mark_node \
1185 && !TREE_CONSTANT (DECL_INITIAL (EXP)))) \
1190 switch (v850_get_data_area (EXP)) \
1192 case DATA_AREA_ZDA: \
1194 rozdata_section (); \
1199 case DATA_AREA_TDA: \
1203 case DATA_AREA_SDA: \
1205 rosdata_section (); \
1218 else if (TREE_CODE (EXP) == STRING_CST) \
1220 if (! flag_writable_strings) \
1231 /* A C statement or statements to switch to the appropriate section
1232 for output of RTX in mode MODE. You can assume that RTX is some
1233 kind of constant in RTL. The argument MODE is redundant except in
1234 the case of a `const_int' rtx. Select the section by calling
1235 `text_section' or one of the alternatives for other sections.
1237 Do not define this macro if you put all constants in the read-only
1239 /* #define SELECT_RTX_SECTION(MODE, RTX) */
1241 /* Output at beginning/end of assembler file. */
1242 #undef ASM_FILE_START
1243 #define ASM_FILE_START(FILE) asm_file_start(FILE)
1245 #define ASM_COMMENT_START "#"
1247 /* Output to assembler file text saying following lines
1248 may contain character constants, extra white space, comments, etc. */
1250 #define ASM_APP_ON "#APP\n"
1252 /* Output to assembler file text saying following lines
1253 no longer contain unusual constructs. */
1255 #define ASM_APP_OFF "#NO_APP\n"
1257 /* This is how to output an assembler line defining a `double' constant.
1258 It is .double or .float, depending. */
1260 #define ASM_OUTPUT_DOUBLE(FILE, VALUE) \
1261 do { char dstr[30]; \
1262 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", dstr); \
1263 fprintf (FILE, "\t.double %s\n", dstr); \
1267 /* This is how to output an assembler line defining a `float' constant. */
1268 #define ASM_OUTPUT_FLOAT(FILE, VALUE) \
1269 do { char dstr[30]; \
1270 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", dstr); \
1271 fprintf (FILE, "\t.float %s\n", dstr); \
1274 /* This is how to output an assembler line defining an `int' constant. */
1276 #define ASM_OUTPUT_INT(FILE, VALUE) \
1277 ( fprintf (FILE, "\t.long "), \
1278 output_addr_const (FILE, (VALUE)), \
1279 fprintf (FILE, "\n"))
1281 /* Likewise for `char' and `short' constants. */
1283 #define ASM_OUTPUT_SHORT(FILE, VALUE) \
1284 ( fprintf (FILE, "\t.hword "), \
1285 output_addr_const (FILE, (VALUE)), \
1286 fprintf (FILE, "\n"))
1288 #define ASM_OUTPUT_CHAR(FILE, VALUE) \
1289 ( fprintf (FILE, "\t.byte "), \
1290 output_addr_const (FILE, (VALUE)), \
1291 fprintf (FILE, "\n"))
1293 /* This is how to output an assembler line for a numeric constant byte. */
1294 #define ASM_OUTPUT_BYTE(FILE, VALUE) \
1295 fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
1297 /* Define the parentheses used to group arithmetic operations
1298 in assembler code. */
1300 #define ASM_OPEN_PAREN "("
1301 #define ASM_CLOSE_PAREN ")"
1303 /* This says how to output the assembler to define a global
1304 uninitialized but not common symbol. */
1306 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
1307 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
1309 #undef ASM_OUTPUT_ALIGNED_BSS
1310 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
1311 v850_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
1313 /* This says how to output the assembler to define a global
1314 uninitialized, common symbol. */
1315 #undef ASM_OUTPUT_ALIGNED_COMMON
1316 #undef ASM_OUTPUT_COMMON
1317 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
1318 v850_output_common (FILE, DECL, NAME, SIZE, ALIGN)
1320 /* This says how to output the assembler to define a local
1321 uninitialized symbol. */
1322 #undef ASM_OUTPUT_ALIGNED_LOCAL
1323 #undef ASM_OUTPUT_LOCAL
1324 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
1325 v850_output_local (FILE, DECL, NAME, SIZE, ALIGN)
1327 /* This is how to output the definition of a user-level label named NAME,
1328 such as the label on a static function or variable NAME. */
1330 #define ASM_OUTPUT_LABEL(FILE, NAME) \
1331 do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
1333 /* This is how to output a command to make the user-level label named NAME
1334 defined for reference from other files. */
1336 #define ASM_GLOBALIZE_LABEL(FILE, NAME) \
1337 do { fputs ("\t.global ", FILE); assemble_name (FILE, NAME); fputs ("\n", FILE);} while (0)
1339 /* This is how to output a reference to a user-level label named NAME.
1340 `assemble_name' uses this. */
1342 #undef ASM_OUTPUT_LABELREF
1343 #define ASM_OUTPUT_LABELREF(FILE, NAME) \
1346 STRIP_NAME_ENCODING (real_name, (NAME)); \
1347 fprintf (FILE, "_%s", real_name); \
1350 /* Store in OUTPUT a string (made with alloca) containing
1351 an assembler-name for a local static variable named NAME.
1352 LABELNO is an integer which is different for each call. */
1354 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
1355 ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \
1356 sprintf ((OUTPUT), "%s___%d", (NAME), (LABELNO)))
1358 /* This is how we tell the assembler that two symbols have the same value. */
1360 #define ASM_OUTPUT_DEF(FILE,NAME1,NAME2) \
1361 do { assemble_name(FILE, NAME1); \
1362 fputs(" = ", FILE); \
1363 assemble_name(FILE, NAME2); \
1364 fputc('\n', FILE); } while (0)
1367 /* How to refer to registers in assembler output.
1368 This sequence is indexed by compiler's hard-register-number (see above). */
1370 #define REGISTER_NAMES \
1371 { "r0", "r1", "r2", "sp", "gp", "r5", "r6" , "r7", \
1372 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
1373 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
1374 "r24", "r25", "r26", "r27", "r28", "r29", "ep", "r31", \
1377 #define ADDITIONAL_REGISTER_NAMES \
1387 /* Print an instruction operand X on file FILE.
1388 look in v850.c for details */
1390 #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE)
1392 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
1395 /* Print a memory operand whose address is X, on file FILE.
1396 This uses a function in output-vax.c. */
1398 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR)
1400 #define ASM_OUTPUT_REG_PUSH(FILE,REGNO)
1401 #define ASM_OUTPUT_REG_POP(FILE,REGNO)
1403 /* This is how to output an element of a case-vector that is absolute. */
1405 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
1406 asm_fprintf (FILE, "\t%s .L%d\n", \
1407 (TARGET_BIG_SWITCH ? ".long" : ".short"), VALUE)
1409 /* This is how to output an element of a case-vector that is relative. */
1411 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
1412 fprintf (FILE, "\t%s .L%d-.L%d\n", \
1413 (TARGET_BIG_SWITCH ? ".long" : ".short"), \
1416 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
1418 fprintf (FILE, "\t.align %d\n", (LOG))
1420 /* We don't have to worry about dbx compatibility for the v850. */
1421 #define DEFAULT_GDB_EXTENSIONS 1
1423 /* Use stabs debugging info by default. */
1424 #undef PREFERRED_DEBUGGING_TYPE
1425 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
1427 #define DBX_REGISTER_NUMBER(REGNO) REGNO
1429 /* Define to use software floating point emulator for REAL_ARITHMETIC and
1430 decimal <-> binary conversion. */
1431 #define REAL_ARITHMETIC
1433 /* Specify the machine mode that this machine uses
1434 for the index in the tablejump instruction. */
1435 #define CASE_VECTOR_MODE (TARGET_BIG_SWITCH ? SImode : HImode)
1437 /* Define this if the case instruction drops through after the table
1438 when the index is out of range. Don't define it if the case insn
1439 jumps to the default label instead. */
1440 /* #define CASE_DROPS_THROUGH */
1442 /* Define as C expression which evaluates to nonzero if the tablejump
1443 instruction expects the table to contain offsets from the address of the
1445 Do not define this if the table should contain absolute addresses. */
1446 #define CASE_VECTOR_PC_RELATIVE 1
1448 /* The switch instruction requires that the jump table immediately follow
1450 #define JUMP_TABLES_IN_TEXT_SECTION 1
1452 /* svr4.h defines this assuming that 4 byte alignment is required. */
1453 #undef ASM_OUTPUT_BEFORE_CASE_LABEL
1454 #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \
1455 ASM_OUTPUT_ALIGN ((FILE), (TARGET_BIG_SWITCH ? 2 : 1));
1457 #define WORD_REGISTER_OPERATIONS
1459 /* Byte and short loads sign extend the value to a word. */
1460 #define LOAD_EXTEND_OP(MODE) SIGN_EXTEND
1462 /* Specify the tree operation to be used to convert reals to integers. */
1463 #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
1465 /* This flag, if defined, says the same insns that convert to a signed fixnum
1466 also convert validly to an unsigned one. */
1467 #define FIXUNS_TRUNC_LIKE_FIX_TRUNC
1469 /* This is the kind of divide that is easiest to do in the general case. */
1470 #define EASY_DIV_EXPR TRUNC_DIV_EXPR
1472 /* Max number of bytes we can move from memory to memory
1473 in one reasonably fast instruction. */
1476 /* Define if shifts truncate the shift count
1477 which implies one can omit a sign-extension or zero-extension
1478 of a shift count. */
1479 #define SHIFT_COUNT_TRUNCATED 1
1481 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
1482 is done just by pretending it is already truncated. */
1483 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1485 #define STORE_FLAG_VALUE 1
1487 /* Specify the machine mode that pointers have.
1488 After generation of rtl, the compiler makes no further distinction
1489 between pointers and any other objects of this machine mode. */
1490 #define Pmode SImode
1492 /* A function address in a call instruction
1493 is a byte address (for indexing purposes)
1494 so give the MEM rtx a byte's mode. */
1495 #define FUNCTION_MODE QImode
1497 /* A C expression whose value is nonzero if IDENTIFIER with arguments ARGS
1498 is a valid machine specific attribute for DECL.
1499 The attributes in ATTRIBUTES have previously been assigned to DECL. */
1500 #define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, IDENTIFIER, ARGS) \
1501 v850_valid_machine_decl_attribute (DECL, IDENTIFIER, ARGS)
1503 /* A C statement that assigns default attributes to a newly created DECL. */
1504 #define SET_DEFAULT_DECL_ATTRIBUTES(decl, attr) \
1505 v850_set_default_decl_attr (decl)
1507 /* Tell compiler we want to support GHS pragmas */
1508 #define HANDLE_PRAGMA(get, unget, name) v850_handle_pragma (get, unget, name)
1510 enum v850_pragma_state
1513 V850_PS_SHOULD_BE_DONE,
1515 V850_PS_MAYBE_SECTION_NAME,
1516 V850_PS_EXPECTING_EQUALS,
1517 V850_PS_EXPECTING_SECTION_ALIAS,
1521 enum v850_pragma_type
1526 V850_PT_START_SECTION,
1530 /* enum GHS_SECTION_KIND is an enumeration of the kinds of sections that
1531 can appear in the "ghs section" pragma. These names are used to index
1532 into the GHS_default_section_names[] and GHS_current_section_names[]
1533 that are defined in v850.c, and so the ordering of each must remain
1536 These arrays give the default and current names for each kind of
1537 section defined by the GHS pragmas. The current names can be changed
1538 by the "ghs section" pragma. If the current names are null, use
1539 the default names. Note that the two arrays have different types.
1541 For the *normal* section kinds (like .data, .text, etc.) we do not
1542 want to explicitly force the name of these sections, but would rather
1543 let the linker (or at least the back end) choose the name of the
1544 section, UNLESS the user has force a specific name for these section
1545 kinds. To accomplish this set the name in ghs_default_section_names
1548 enum GHS_section_kind
1550 GHS_SECTION_KIND_DEFAULT,
1552 GHS_SECTION_KIND_TEXT,
1553 GHS_SECTION_KIND_DATA,
1554 GHS_SECTION_KIND_RODATA,
1555 GHS_SECTION_KIND_BSS,
1556 GHS_SECTION_KIND_SDATA,
1557 GHS_SECTION_KIND_ROSDATA,
1558 GHS_SECTION_KIND_TDATA,
1559 GHS_SECTION_KIND_ZDATA,
1560 GHS_SECTION_KIND_ROZDATA,
1562 COUNT_OF_GHS_SECTION_KINDS /* must be last */
1565 /* The assembler op to start the file. */
1567 #define FILE_ASM_OP "\t.file\n"
1569 /* Enable the register move pass to improve code. */
1570 #define ENABLE_REGMOVE_PASS
1573 /* Implement ZDA, TDA, and SDA */
1575 #define EP_REGNUM 30 /* ep register number */
1577 #define ENCODE_SECTION_INFO(DECL) \
1579 if ((TREE_STATIC (DECL) || DECL_EXTERNAL (DECL)) \
1580 && TREE_CODE (DECL) == VAR_DECL) \
1581 v850_encode_data_area (DECL); \
1584 #define ZDA_NAME_FLAG_CHAR '@'
1585 #define TDA_NAME_FLAG_CHAR '%'
1586 #define SDA_NAME_FLAG_CHAR '&'
1588 #define ZDA_NAME_P(NAME) (*(NAME) == ZDA_NAME_FLAG_CHAR)
1589 #define TDA_NAME_P(NAME) (*(NAME) == TDA_NAME_FLAG_CHAR)
1590 #define SDA_NAME_P(NAME) (*(NAME) == SDA_NAME_FLAG_CHAR)
1592 #define ENCODED_NAME_P(SYMBOL_NAME) \
1593 (ZDA_NAME_P (SYMBOL_NAME) \
1594 || TDA_NAME_P (SYMBOL_NAME) \
1595 || SDA_NAME_P (SYMBOL_NAME))
1597 #define STRIP_NAME_ENCODING(VAR,SYMBOL_NAME) \
1598 (VAR) = (SYMBOL_NAME) + (ENCODED_NAME_P (SYMBOL_NAME) || *(SYMBOL_NAME) == '*')
1600 /* Define this if you have defined special-purpose predicates in the
1601 file `MACHINE.c'. This macro is called within an initializer of an
1602 array of structures. The first field in the structure is the name
1603 of a predicate and the second field is an array of rtl codes. For
1604 each predicate, list all rtl codes that can be in expressions
1605 matched by the predicate. The list should have a trailing comma. */
1607 #define PREDICATE_CODES \
1608 { "ep_memory_operand", { MEM }}, \
1609 { "reg_or_0_operand", { REG, SUBREG, CONST_INT, CONST_DOUBLE }}, \
1610 { "reg_or_int5_operand", { REG, SUBREG, CONST_INT }}, \
1611 { "call_address_operand", { REG, SYMBOL_REF }}, \
1612 { "movsi_source_operand", { LABEL_REF, SYMBOL_REF, CONST_INT, \
1613 CONST_DOUBLE, CONST, HIGH, MEM, \
1615 { "special_symbolref_operand", { SYMBOL_REF }}, \
1616 { "power_of_two_operand", { CONST_INT }}, \
1617 { "pattern_is_ok_for_prologue", { PARALLEL }}, \
1618 { "pattern_is_ok_for_epilogue", { PARALLEL }}, \
1619 { "register_is_ok_for_epilogue",{ REG }}, \
1620 { "not_power_of_two_operand", { CONST_INT }},
1622 /* Note, due to dependency and search path conflicts, prototypes
1623 involving the FILE, rtx or tree types cannot be included here.
1624 They are included at the start of v850.c */
1626 extern void asm_file_start ();
1627 extern void print_operand ();
1628 extern void print_operand_address ();
1629 extern int function_arg_partial_nregs ();
1630 extern int const_costs ();
1631 extern char * output_move_double ();
1632 extern char * output_move_single ();
1633 extern int ep_memory_operand ();
1634 extern int reg_or_0_operand ();
1635 extern int reg_or_int5_operand ();
1636 extern int call_address_operand ();
1637 extern int movsi_source_operand ();
1638 extern int power_of_two_operand ();
1639 extern int not_power_of_two_operand ();
1640 extern int special_symbolref_operand ();
1641 extern void v850_reorg ();
1642 extern void notice_update_cc ();
1643 extern int v850_valid_machine_decl_attribute ();
1644 extern int v850_interrupt_function_p ();
1645 extern int pattern_is_ok_for_prologue ();
1646 extern int pattern_is_ok_for_epilogue ();
1647 extern int register_is_ok_for_epilogue ();
1648 extern char * construct_save_jarl ();
1649 extern char * construct_restore_jr ();
1651 extern void override_options PROTO ((void));
1652 extern int compute_register_save_size PROTO ((long *));
1653 extern int compute_frame_size PROTO ((int, long *));
1654 extern void expand_prologue PROTO ((void));
1655 extern void expand_epilogue PROTO ((void));
1657 extern void v850_output_aligned_bss ();
1658 extern void v850_output_common ();
1659 extern void v850_output_local ();
1660 extern void sdata_section PROTO ((void));
1661 extern void rosdata_section PROTO ((void));
1662 extern void sbss_section PROTO ((void));
1663 extern void tdata_section PROTO ((void));
1664 extern void zdata_section PROTO ((void));
1665 extern void rozdata_section PROTO ((void));
1666 extern void zbss_section PROTO ((void));
1667 extern int v850_handle_pragma PROTO ((int (*)(void), void (*)(int), char *));
1668 extern void v850_encode_data_area ();
1669 extern void v850_set_default_decl_attr ();
1670 extern v850_data_area v850_get_data_area ();