1 /* Definitions of target machine for GNU compiler. NEC V850 series
2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 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. */
25 /* These are defiend in svr4.h but we want to override them. */
34 #define TARGET_CPU_generic 1
36 #ifndef TARGET_CPU_DEFAULT
37 #define TARGET_CPU_DEFAULT TARGET_CPU_generic
40 #define MASK_DEFAULT MASK_V850
41 #define SUBTARGET_ASM_SPEC "%{!mv*:-mv850}"
42 #define SUBTARGET_CPP_SPEC "%{!mv*:-D__v850__}"
43 #define TARGET_VERSION fprintf (stderr, " (NEC V850)");
46 #define ASM_SPEC "%{mv*:-mv%*}"
47 #define CPP_SPEC "%{mv850ea:-D__v850ea__} %{mv850e:-D__v850e__} %{mv850:-D__v850__} %(subtarget_cpp_spec)"
50 { "subtarget_asm_spec", SUBTARGET_ASM_SPEC }, \
51 { "subtarget_cpp_spec", SUBTARGET_CPP_SPEC }
53 /* Names to predefine in the preprocessor for this target machine. */
54 #define CPP_PREDEFINES "-D__v851__ -D__v850"
56 /* Run-time compilation parameters selecting different hardware subsets. */
58 extern int target_flags;
60 /* Target flags bits, see below for an explanation of the bits. */
61 #define MASK_GHS 0x00000001
62 #define MASK_LONG_CALLS 0x00000002
63 #define MASK_EP 0x00000004
64 #define MASK_PROLOG_FUNCTION 0x00000008
65 #define MASK_DEBUG 0x40000000
67 #define MASK_CPU 0x00000030
68 #define MASK_V850 0x00000010
70 #define MASK_BIG_SWITCH 0x00000100
72 /* Macros used in the machine description to test the flags. */
74 /* The GHS calling convention support doesn't really work,
75 mostly due to a lack of documentation. Outstanding issues:
77 * How do varargs & stdarg really work. How to they handle
78 passing structures (if at all).
80 * Doubles are normally 4 byte aligned, except in argument
81 lists where they are 8 byte aligned. Is the alignment
82 in the argument list based on the first parameter,
83 first stack parameter, etc etc.
85 * Passing/returning of large structures probably isn't the same
86 as GHS. We don't have enough documentation on their conventions
89 * Tests of SETUP_INCOMING_VARARGS need to be made runtime checks
90 since it depends on TARGET_GHS. */
91 #define TARGET_GHS (target_flags & MASK_GHS)
93 /* Don't do PC-relative calls, instead load the address of the target
94 function into a register and perform a register indirect call. */
95 #define TARGET_LONG_CALLS (target_flags & MASK_LONG_CALLS)
97 /* Whether to optimize space by using ep (r30) for pointers with small offsets
99 #define TARGET_EP (target_flags & MASK_EP)
101 /* Whether to call out-of-line functions to save registers or not. */
102 #define TARGET_PROLOG_FUNCTION (target_flags & MASK_PROLOG_FUNCTION)
104 #define TARGET_V850 ((target_flags & MASK_CPU) == MASK_V850)
106 /* Whether to emit 2 byte per entry or 4 byte per entry switch tables. */
107 #define TARGET_BIG_SWITCH (target_flags & MASK_BIG_SWITCH)
109 /* General debug flag */
110 #define TARGET_DEBUG (target_flags & MASK_DEBUG)
112 /* Macro to define tables used to set the flags.
113 This is a list in braces of pairs in braces,
114 each pair being { "NAME", VALUE }
115 where VALUE is the bits to set or minus the bits to clear.
116 An empty string NAME is used to identify the default VALUE. */
118 #define TARGET_SWITCHES \
119 {{ "ghs", MASK_GHS, N_("Support Green Hills ABI") }, \
120 { "no-ghs", -MASK_GHS, "" }, \
121 { "long-calls", MASK_LONG_CALLS, \
122 N_("Prohibit PC relative function calls") },\
123 { "no-long-calls", -MASK_LONG_CALLS, "" }, \
125 N_("Reuse r30 on a per function basis") }, \
126 { "no-ep", -MASK_EP, "" }, \
127 { "prolog-function", MASK_PROLOG_FUNCTION, \
128 N_("Use stubs for function prologues") }, \
129 { "no-prolog-function", -MASK_PROLOG_FUNCTION, "" }, \
130 { "space", MASK_EP | MASK_PROLOG_FUNCTION, \
131 N_("Same as: -mep -mprolog-function") }, \
132 { "debug", MASK_DEBUG, N_("Enable backend debugging") }, \
133 { "v850", MASK_V850, \
134 N_("Compile for the v850 processor") }, \
135 { "v850", -(MASK_V850 ^ MASK_CPU), "" }, \
136 { "big-switch", MASK_BIG_SWITCH, \
137 N_("Use 4 byte entries in switch tables") },\
138 { "", MASK_DEFAULT, ""}}
140 /* Information about the various small memory areas. */
141 struct small_memory_info {
148 enum small_memory_type {
149 /* tiny data area, using EP as base register */
150 SMALL_MEMORY_TDA = 0,
151 /* small data area using dp as base register */
153 /* zero data area using r0 as base register */
158 extern struct small_memory_info small_memory[(int)SMALL_MEMORY_max];
160 /* This macro is similar to `TARGET_SWITCHES' but defines names of
161 command options that have values. Its definition is an
162 initializer with a subgrouping for each command option.
164 Each subgrouping contains a string constant, that defines the
165 fixed part of the option name, and the address of a variable. The
166 variable, type `char *', is set to the variable part of the given
167 option if the fixed part matches. The actual option name is made
168 by appending `-m' to the specified name.
170 Here is an example which defines `-mshort-data-NUMBER'. If the
171 given option is `-mshort-data-512', the variable `m88k_short_data'
172 will be set to the string `"512"'.
174 extern char *m88k_short_data;
175 #define TARGET_OPTIONS \
176 { { "short-data-", &m88k_short_data } } */
178 #define TARGET_OPTIONS \
180 { "tda=", &small_memory[ (int)SMALL_MEMORY_TDA ].value, \
181 N_("Set the max size of data eligible for the TDA area") }, \
182 { "tda-", &small_memory[ (int)SMALL_MEMORY_TDA ].value, "" }, \
183 { "sda=", &small_memory[ (int)SMALL_MEMORY_SDA ].value, \
184 N_("Set the max size of data eligible for the SDA area") }, \
185 { "sda-", &small_memory[ (int)SMALL_MEMORY_SDA ].value, "" }, \
186 { "zda=", &small_memory[ (int)SMALL_MEMORY_ZDA ].value, \
187 N_("Set the max size of data eligible for the ZDA area") }, \
188 { "zda-", &small_memory[ (int)SMALL_MEMORY_ZDA ].value, "" }, \
191 /* Sometimes certain combinations of command options do not make
192 sense on a particular target machine. You can define a macro
193 `OVERRIDE_OPTIONS' to take account of this. This macro, if
194 defined, is executed once just after all the command options have
197 Don't use this macro to turn on various extra optimizations for
198 `-O'. That is what `OPTIMIZATION_OPTIONS' is for. */
199 #define OVERRIDE_OPTIONS override_options ()
202 /* Show we can debug even without a frame pointer. */
203 #define CAN_DEBUG_WITHOUT_FP
205 /* Some machines may desire to change what optimizations are
206 performed for various optimization levels. This macro, if
207 defined, is executed once just after the optimization level is
208 determined and before the remainder of the command options have
209 been parsed. Values set in this macro are used as the default
210 values for the other command line options.
212 LEVEL is the optimization level specified; 2 if `-O2' is
213 specified, 1 if `-O' is specified, and 0 if neither is specified.
215 SIZE is non-zero if `-Os' is specified, 0 otherwise.
217 You should not use this macro to change options that are not
218 machine-specific. These should uniformly selected by the same
219 optimization level on all supported machines. Use this macro to
220 enable machine-specific optimizations.
222 *Do not examine `write_symbols' in this macro!* The debugging
223 options are not supposed to alter the generated code. */
225 #define OPTIMIZATION_OPTIONS(LEVEL,SIZE) \
228 target_flags |= (MASK_EP | MASK_PROLOG_FUNCTION); \
232 /* Target machine storage layout */
234 /* Define this if most significant bit is lowest numbered
235 in instructions that operate on numbered bit-fields.
236 This is not true on the NEC V850. */
237 #define BITS_BIG_ENDIAN 0
239 /* Define this if most significant byte of a word is the lowest numbered. */
240 /* This is not true on the NEC V850. */
241 #define BYTES_BIG_ENDIAN 0
243 /* Define this if most significant word of a multiword number is lowest
245 This is not true on the NEC V850. */
246 #define WORDS_BIG_ENDIAN 0
248 /* Number of bits in an addressable storage unit */
249 #define BITS_PER_UNIT 8
251 /* Width in bits of a "word", which is the contents of a machine register.
252 Note that this is not necessarily the width of data type `int';
253 if using 16-bit ints on a 68000, this would still be 32.
254 But on a machine with 16-bit registers, this would be 16. */
255 #define BITS_PER_WORD 32
257 /* Width of a word, in units (bytes). */
258 #define UNITS_PER_WORD 4
260 /* Width in bits of a pointer.
261 See also the macro `Pmode' defined below. */
262 #define POINTER_SIZE 32
264 /* Define this macro if it is advisable to hold scalars in registers
265 in a wider mode than that declared by the program. In such cases,
266 the value is constrained to be within the bounds of the declared
267 type, but kept valid in the wider mode. The signedness of the
268 extension may differ from that of the type.
270 Some simple experiments have shown that leaving UNSIGNEDP alone
271 generates the best overall code. */
273 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
274 if (GET_MODE_CLASS (MODE) == MODE_INT \
275 && GET_MODE_SIZE (MODE) < 4) \
278 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
279 #define PARM_BOUNDARY 32
281 /* The stack goes in 32 bit lumps. */
282 #define STACK_BOUNDARY 32
284 /* Allocation boundary (in *bits*) for the code of a function.
285 16 is the minimum boundary; 32 would give better performance. */
286 #define FUNCTION_BOUNDARY 16
288 /* No data type wants to be aligned rounder than this. */
289 #define BIGGEST_ALIGNMENT 32
291 /* Alignment of field after `int : 0' in a structure. */
292 #define EMPTY_FIELD_BOUNDARY 32
294 /* No structure field wants to be aligned rounder than this. */
295 #define BIGGEST_FIELD_ALIGNMENT 32
297 /* Define this if move instructions will actually fail to work
298 when given unaligned data. */
299 #define STRICT_ALIGNMENT 1
301 /* Define this as 1 if `char' should by default be signed; else as 0.
303 On the NEC V850, loads do sign extension, so make this default. */
304 #define DEFAULT_SIGNED_CHAR 1
306 /* Standard register usage. */
308 /* Number of actual hardware registers.
309 The hardware registers are assigned numbers for the compiler
310 from 0 to just below FIRST_PSEUDO_REGISTER.
312 All registers that the compiler knows about must be given numbers,
313 even those that are not normally considered general registers. */
315 #define FIRST_PSEUDO_REGISTER 34
317 /* 1 for registers that have pervasive standard uses
318 and are not available for the register allocator. */
320 #define FIXED_REGISTERS \
321 { 1, 1, 0, 1, 1, 0, 0, 0, \
322 0, 0, 0, 0, 0, 0, 0, 0, \
323 0, 0, 0, 0, 0, 0, 0, 0, \
324 0, 0, 0, 0, 0, 0, 1, 0, \
327 /* 1 for registers not available across function calls.
328 These must include the FIXED_REGISTERS and also any
329 registers that can be used without being saved.
330 The latter must include the registers where values are returned
331 and the register where structure-value addresses are passed.
332 Aside from that, you can include as many other registers as you
335 #define CALL_USED_REGISTERS \
336 { 1, 1, 0, 1, 1, 1, 1, 1, \
337 1, 1, 1, 1, 1, 1, 1, 1, \
338 1, 1, 1, 1, 0, 0, 0, 0, \
339 0, 0, 0, 0, 0, 0, 1, 1, \
342 /* List the order in which to allocate registers. Each register must be
343 listed once, even those in FIXED_REGISTERS.
345 On the 850, we make the return registers first, then all of the volatile
346 registers, then the saved registers in reverse order to better save the
347 registers with an out of line function, and finally the fixed
350 #define REG_ALLOC_ORDER \
352 10, 11, /* return registers */ \
353 12, 13, 14, 15, 16, 17, 18, 19, /* scratch registers */ \
354 6, 7, 8, 9, 31, /* argument registers */ \
355 29, 28, 27, 26, 25, 24, 23, 22, /* saved registers */ \
357 0, 1, 3, 4, 5, 30, 32, 33 /* fixed registers */ \
360 /* Return number of consecutive hard regs needed starting at reg REGNO
361 to hold something of mode MODE.
363 This is ordinarily the length in words of a value of mode MODE
364 but can be less for certain modes in special long registers. */
366 #define HARD_REGNO_NREGS(REGNO, MODE) \
367 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
369 /* Value is 1 if hard register REGNO can hold a value of machine-mode
372 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
373 ((((REGNO) & 1) == 0) || (GET_MODE_SIZE (MODE) <= 4))
375 /* Value is 1 if it is a good idea to tie two pseudo registers
376 when one has mode MODE1 and one has mode MODE2.
377 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
378 for any hard reg, then this must be 0 for correct output. */
379 #define MODES_TIEABLE_P(MODE1, MODE2) \
380 (MODE1 == MODE2 || (GET_MODE_SIZE (MODE1) <= 4 && GET_MODE_SIZE (MODE2) <= 4))
383 /* Define the classes of registers for register constraints in the
384 machine description. Also define ranges of constants.
386 One of the classes must always be named ALL_REGS and include all hard regs.
387 If there is more than one class, another class must be named NO_REGS
388 and contain no registers.
390 The name GENERAL_REGS must be the name of a class (or an alias for
391 another name such as ALL_REGS). This is the class of registers
392 that is allowed by "g" or "r" in a register constraint.
393 Also, registers outside this class are allocated only when
394 instructions express preferences for them.
396 The classes must be numbered in nondecreasing order; that is,
397 a larger-numbered class must never be contained completely
398 in a smaller-numbered class.
400 For any two classes, it is very desirable that there be another
401 class that represents their union. */
405 NO_REGS, GENERAL_REGS, ALL_REGS, LIM_REG_CLASSES
408 #define N_REG_CLASSES (int) LIM_REG_CLASSES
410 /* Give names of register classes as strings for dump file. */
412 #define REG_CLASS_NAMES \
413 { "NO_REGS", "GENERAL_REGS", "ALL_REGS", "LIM_REGS" }
415 /* Define which registers fit in which classes.
416 This is an initializer for a vector of HARD_REG_SET
417 of length N_REG_CLASSES. */
419 #define REG_CLASS_CONTENTS \
421 { 0x00000000 }, /* NO_REGS */ \
422 { 0xffffffff }, /* GENERAL_REGS */ \
423 { 0xffffffff }, /* ALL_REGS */ \
426 /* The same information, inverted:
427 Return the class number of the smallest class containing
428 reg number REGNO. This could be a conditional expression
429 or could index an array. */
431 #define REGNO_REG_CLASS(REGNO) GENERAL_REGS
433 /* The class value for index registers, and the one for base regs. */
435 #define INDEX_REG_CLASS NO_REGS
436 #define BASE_REG_CLASS GENERAL_REGS
438 /* Get reg_class from a letter such as appears in the machine description. */
440 #define REG_CLASS_FROM_LETTER(C) (NO_REGS)
442 /* Macros to check register numbers against specific register classes. */
444 /* These assume that REGNO is a hard or pseudo reg number.
445 They give nonzero only if REGNO is a hard reg of the suitable class
446 or a pseudo reg currently allocated to a suitable hard reg.
447 Since they use reg_renumber, they are safe only once reg_renumber
448 has been allocated, which happens in local-alloc.c. */
450 #define REGNO_OK_FOR_BASE_P(regno) \
451 ((regno) < FIRST_PSEUDO_REGISTER || reg_renumber[regno] >= 0)
453 #define REGNO_OK_FOR_INDEX_P(regno) 0
455 /* Given an rtx X being reloaded into a reg required to be
456 in class CLASS, return the class of reg to actually use.
457 In general this is just CLASS; but on some machines
458 in some cases it is preferable to use a more restrictive class. */
460 #define PREFERRED_RELOAD_CLASS(X,CLASS) (CLASS)
462 /* Return the maximum number of consecutive registers
463 needed to represent mode MODE in a register of class CLASS. */
465 #define CLASS_MAX_NREGS(CLASS, MODE) \
466 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
468 /* The letters I, J, K, L, M, N, O, P in a register constraint string
469 can be used to stand for particular ranges of immediate operands.
470 This macro defines what the ranges are.
471 C is the letter, and VALUE is a constant value.
472 Return 1 if VALUE is in the range specified by C. */
474 #define INT_7_BITS(VALUE) ((unsigned) (VALUE) + 0x40 < 0x80)
475 #define INT_8_BITS(VALUE) ((unsigned) (VALUE) + 0x80 < 0x100)
477 #define CONST_OK_FOR_I(VALUE) ((VALUE) == 0)
478 /* 5 bit signed immediate */
479 #define CONST_OK_FOR_J(VALUE) ((unsigned) (VALUE) + 0x10 < 0x20)
480 /* 16 bit signed immediate */
481 #define CONST_OK_FOR_K(VALUE) ((unsigned) (VALUE) + 0x8000 < 0x10000)
482 /* valid constant for movhi instruction. */
483 #define CONST_OK_FOR_L(VALUE) \
484 (((unsigned) ((int) (VALUE) >> 16) + 0x8000 < 0x10000) \
485 && CONST_OK_FOR_I ((VALUE & 0xffff)))
486 /* 16 bit unsigned immediate */
487 #define CONST_OK_FOR_M(VALUE) ((unsigned)(VALUE) < 0x10000)
488 /* 5 bit unsigned immediate in shift instructions */
489 #define CONST_OK_FOR_N(VALUE) ((unsigned) (VALUE) <= 31)
491 #define CONST_OK_FOR_O(VALUE) 0
492 #define CONST_OK_FOR_P(VALUE) 0
495 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
496 ((C) == 'I' ? CONST_OK_FOR_I (VALUE) : \
497 (C) == 'J' ? CONST_OK_FOR_J (VALUE) : \
498 (C) == 'K' ? CONST_OK_FOR_K (VALUE) : \
499 (C) == 'L' ? CONST_OK_FOR_L (VALUE) : \
500 (C) == 'M' ? CONST_OK_FOR_M (VALUE) : \
501 (C) == 'N' ? CONST_OK_FOR_N (VALUE) : \
502 (C) == 'O' ? CONST_OK_FOR_O (VALUE) : \
503 (C) == 'P' ? CONST_OK_FOR_P (VALUE) : \
506 /* Similar, but for floating constants, and defining letters G and H.
507 Here VALUE is the CONST_DOUBLE rtx itself.
509 `G' is a zero of some form. */
511 #define CONST_DOUBLE_OK_FOR_G(VALUE) \
512 ((GET_MODE_CLASS (GET_MODE (VALUE)) == MODE_FLOAT \
513 && (VALUE) == CONST0_RTX (GET_MODE (VALUE))) \
514 || (GET_MODE_CLASS (GET_MODE (VALUE)) == MODE_INT \
515 && CONST_DOUBLE_LOW (VALUE) == 0 \
516 && CONST_DOUBLE_HIGH (VALUE) == 0))
518 #define CONST_DOUBLE_OK_FOR_H(VALUE) 0
520 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
521 ((C) == 'G' ? CONST_DOUBLE_OK_FOR_G (VALUE) \
522 : (C) == 'H' ? CONST_DOUBLE_OK_FOR_H (VALUE) \
526 /* Stack layout; function entry, exit and calling. */
528 /* Define this if pushing a word on the stack
529 makes the stack pointer a smaller address. */
531 #define STACK_GROWS_DOWNWARD
533 /* Define this if the nominal address of the stack frame
534 is at the high-address end of the local variables;
535 that is, each additional local variable allocated
536 goes at a more negative offset in the frame. */
538 #define FRAME_GROWS_DOWNWARD
540 /* Offset within stack frame to start allocating local variables at.
541 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
542 first local allocated. Otherwise, it is the offset to the BEGINNING
543 of the first local allocated. */
545 #define STARTING_FRAME_OFFSET 0
547 /* Offset of first parameter from the argument pointer register value. */
548 /* Is equal to the size of the saved fp + pc, even if an fp isn't
549 saved since the value is used before we know. */
551 #define FIRST_PARM_OFFSET(FNDECL) 0
553 /* Specify the registers used for certain standard purposes.
554 The values of these macros are register numbers. */
556 /* Register to use for pushing function arguments. */
557 #define STACK_POINTER_REGNUM 3
559 /* Base register for access to local variables of the function. */
560 #define FRAME_POINTER_REGNUM 32
562 /* Register containing return address from latest function call. */
563 #define LINK_POINTER_REGNUM 31
565 /* On some machines the offset between the frame pointer and starting
566 offset of the automatic variables is not known until after register
567 allocation has been done (for example, because the saved registers
568 are between these two locations). On those machines, define
569 `FRAME_POINTER_REGNUM' the number of a special, fixed register to
570 be used internally until the offset is known, and define
571 `HARD_FRAME_POINTER_REGNUM' to be actual the hard register number
572 used for the frame pointer.
574 You should define this macro only in the very rare circumstances
575 when it is not possible to calculate the offset between the frame
576 pointer and the automatic variables until after register
577 allocation has been completed. When this macro is defined, you
578 must also indicate in your definition of `ELIMINABLE_REGS' how to
579 eliminate `FRAME_POINTER_REGNUM' into either
580 `HARD_FRAME_POINTER_REGNUM' or `STACK_POINTER_REGNUM'.
582 Do not define this macro if it would be the same as
583 `FRAME_POINTER_REGNUM'. */
584 #undef HARD_FRAME_POINTER_REGNUM
585 #define HARD_FRAME_POINTER_REGNUM 29
587 /* Base register for access to arguments of the function. */
588 #define ARG_POINTER_REGNUM 33
590 /* Register in which static-chain is passed to a function. */
591 #define STATIC_CHAIN_REGNUM 20
593 /* Value should be nonzero if functions must have frame pointers.
594 Zero means the frame pointer need not be set up (and parms
595 may be accessed via the stack pointer) in functions that seem suitable.
596 This is computed in `reload', in reload1.c. */
597 #define FRAME_POINTER_REQUIRED 0
599 /* If defined, this macro specifies a table of register pairs used to
600 eliminate unneeded registers that point into the stack frame. If
601 it is not defined, the only elimination attempted by the compiler
602 is to replace references to the frame pointer with references to
605 The definition of this macro is a list of structure
606 initializations, each of which specifies an original and
607 replacement register.
609 On some machines, the position of the argument pointer is not
610 known until the compilation is completed. In such a case, a
611 separate hard register must be used for the argument pointer.
612 This register can be eliminated by replacing it with either the
613 frame pointer or the argument pointer, depending on whether or not
614 the frame pointer has been eliminated.
616 In this case, you might specify:
617 #define ELIMINABLE_REGS \
618 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
619 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
620 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
622 Note that the elimination of the argument pointer with the stack
623 pointer is specified first since that is the preferred elimination. */
625 #define ELIMINABLE_REGS \
626 {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
627 { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM }, \
628 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
629 { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM }} \
631 /* A C expression that returns non-zero if the compiler is allowed to
632 try to replace register number FROM-REG with register number
633 TO-REG. This macro need only be defined if `ELIMINABLE_REGS' is
634 defined, and will usually be the constant 1, since most of the
635 cases preventing register elimination are things that the compiler
636 already knows about. */
638 #define CAN_ELIMINATE(FROM, TO) \
639 ((TO) == STACK_POINTER_REGNUM ? ! frame_pointer_needed : 1)
641 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It
642 specifies the initial difference between the specified pair of
643 registers. This macro must be defined if `ELIMINABLE_REGS' is
646 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
648 if ((FROM) == FRAME_POINTER_REGNUM) \
649 (OFFSET) = get_frame_size () + current_function_outgoing_args_size; \
650 else if ((FROM) == ARG_POINTER_REGNUM) \
651 (OFFSET) = compute_frame_size (get_frame_size (), (long *)0); \
656 /* A guess for the V850. */
657 #define PROMOTE_PROTOTYPES 1
659 /* Keep the stack pointer constant throughout the function. */
660 #define ACCUMULATE_OUTGOING_ARGS 1
662 /* Value is the number of bytes of arguments automatically
663 popped when returning from a subroutine call.
664 FUNDECL is the declaration node of the function (as a tree),
665 FUNTYPE is the data type of the function (as a tree),
666 or for a library call it is an identifier node for the subroutine name.
667 SIZE is the number of bytes of arguments passed on the stack. */
669 #define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) 0
671 #define RETURN_ADDR_RTX(COUNT, FP) v850_return_addr (COUNT)
673 /* Define a data type for recording info about an argument list
674 during the scan of that argument list. This data type should
675 hold all necessary information about the function itself
676 and about the args processed so far, enough to enable macros
677 such as FUNCTION_ARG to determine where the next arg should go. */
679 #define CUMULATIVE_ARGS struct cum_arg
680 struct cum_arg { int nbytes; };
682 /* Define where to put the arguments to a function.
683 Value is zero to push the argument on the stack,
684 or a hard register in which to store the argument.
686 MODE is the argument's machine mode.
687 TYPE is the data type of the argument (as a tree).
688 This is null for libcalls where that information may
690 CUM is a variable of type CUMULATIVE_ARGS which gives info about
691 the preceding args and about the function being called.
692 NAMED is nonzero if this argument is a named parameter
693 (otherwise it is an extra parameter matching an ellipsis). */
695 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
696 function_arg (&CUM, MODE, TYPE, NAMED)
698 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
699 function_arg_partial_nregs (&CUM, MODE, TYPE, NAMED)
701 /* Initialize a variable CUM of type CUMULATIVE_ARGS
702 for a call to a function whose data type is FNTYPE.
703 For a library call, FNTYPE is 0. */
705 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT) \
708 /* Update the data in CUM to advance over an argument
709 of mode MODE and data type TYPE.
710 (TYPE is null for libcalls where that information may not be available.) */
712 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
713 ((CUM).nbytes += ((MODE) != BLKmode \
714 ? (GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) & -UNITS_PER_WORD \
715 : (int_size_in_bytes (TYPE) + UNITS_PER_WORD - 1) & -UNITS_PER_WORD))
717 /* When a parameter is passed in a register, stack space is still
719 #define REG_PARM_STACK_SPACE(DECL) (!TARGET_GHS ? 16 : 0)
721 /* Define this if the above stack space is to be considered part of the
722 space allocated by the caller. */
723 #define OUTGOING_REG_PARM_STACK_SPACE
725 extern int current_function_anonymous_args;
726 /* Do any setup necessary for varargs/stdargs functions. */
727 #define SETUP_INCOMING_VARARGS(CUM, MODE, TYPE, PAS, SECOND) \
728 current_function_anonymous_args = (!TARGET_GHS ? 1 : 0);
730 /* Implement `va_arg'. */
731 #define EXPAND_BUILTIN_VA_ARG(valist, type) \
732 v850_va_arg (valist, type)
734 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
735 ((TYPE) && int_size_in_bytes (TYPE) > 8)
737 #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) \
738 ((TYPE) && int_size_in_bytes (TYPE) > 8)
740 /* 1 if N is a possible register number for function argument passing. */
742 #define FUNCTION_ARG_REGNO_P(N) (N >= 6 && N <= 9)
744 /* Define how to find the value returned by a function.
745 VALTYPE is the data type of the value (as a tree).
746 If the precise function being called is known, FUNC is its FUNCTION_DECL;
747 otherwise, FUNC is 0. */
749 #define FUNCTION_VALUE(VALTYPE, FUNC) \
750 gen_rtx_REG (TYPE_MODE (VALTYPE), 10)
752 /* Define how to find the value returned by a library function
753 assuming the value has mode MODE. */
755 #define LIBCALL_VALUE(MODE) \
756 gen_rtx_REG (MODE, 10)
758 /* 1 if N is a possible register number for a function value. */
760 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 10)
762 /* Return values > 8 bytes in length in memory. */
763 #define DEFAULT_PCC_STRUCT_RETURN 0
764 #define RETURN_IN_MEMORY(TYPE) \
765 (int_size_in_bytes (TYPE) > 8 || TYPE_MODE (TYPE) == BLKmode)
767 /* Register in which address to store a structure value
768 is passed to a function. On the V850 it's passed as
769 the first parameter. */
771 #define STRUCT_VALUE 0
773 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
774 the stack pointer does not matter. The value is tested only in
775 functions that have frame pointers.
776 No definition is equivalent to always zero. */
778 #define EXIT_IGNORE_STACK 1
780 /* Output assembler code to FILE to increment profiler label # LABELNO
781 for profiling a function entry. */
783 #define FUNCTION_PROFILER(FILE, LABELNO) ;
785 #define TRAMPOLINE_TEMPLATE(FILE) \
787 fprintf (FILE, "\tjarl .+4,r12\n"); \
788 fprintf (FILE, "\tld.w 12[r12],r5\n"); \
789 fprintf (FILE, "\tld.w 16[r12],r12\n"); \
790 fprintf (FILE, "\tjmp [r12]\n"); \
791 fprintf (FILE, "\tnop\n"); \
792 fprintf (FILE, "\t.long 0\n"); \
793 fprintf (FILE, "\t.long 0\n"); \
796 /* Length in units of the trampoline for entering a nested function. */
798 #define TRAMPOLINE_SIZE 24
800 /* Emit RTL insns to initialize the variable parts of a trampoline.
801 FNADDR is an RTX for the address of the function's pure code.
802 CXT is an RTX for the static chain value for the function. */
804 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
806 emit_move_insn (gen_rtx_MEM (SImode, plus_constant ((TRAMP), 16)), \
808 emit_move_insn (gen_rtx_MEM (SImode, plus_constant ((TRAMP), 20)), \
812 /* Addressing modes, and classification of registers for them. */
815 /* 1 if X is an rtx for a constant that is a valid address. */
817 /* ??? This seems too exclusive. May get better code by accepting more
818 possibilities here, in particular, should accept ZDA_NAME SYMBOL_REFs. */
820 #define CONSTANT_ADDRESS_P(X) \
821 (GET_CODE (X) == CONST_INT \
822 && CONST_OK_FOR_K (INTVAL (X)))
824 /* Maximum number of registers that can appear in a valid memory address. */
826 #define MAX_REGS_PER_ADDRESS 1
828 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
829 and check its validity for a certain class.
830 We have two alternate definitions for each of them.
831 The usual definition accepts all pseudo regs; the other rejects
832 them unless they have been allocated suitable hard regs.
833 The symbol REG_OK_STRICT causes the latter definition to be used.
835 Most source files want to accept pseudo regs in the hope that
836 they will get allocated to the class that the insn wants them to be in.
837 Source files for reload pass need to be strict.
838 After reload, it makes no difference, since pseudo regs have
839 been eliminated by then. */
841 #ifndef REG_OK_STRICT
843 /* Nonzero if X is a hard reg that can be used as an index
844 or if it is a pseudo reg. */
845 #define REG_OK_FOR_INDEX_P(X) 0
846 /* Nonzero if X is a hard reg that can be used as a base reg
847 or if it is a pseudo reg. */
848 #define REG_OK_FOR_BASE_P(X) 1
849 #define REG_OK_FOR_INDEX_P_STRICT(X) 0
850 #define REG_OK_FOR_BASE_P_STRICT(X) REGNO_OK_FOR_BASE_P (REGNO (X))
855 /* Nonzero if X is a hard reg that can be used as an index. */
856 #define REG_OK_FOR_INDEX_P(X) 0
857 /* Nonzero if X is a hard reg that can be used as a base reg. */
858 #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
863 /* A C expression that defines the optional machine-dependent
864 constraint letters that can be used to segregate specific types of
865 operands, usually memory references, for the target machine.
866 Normally this macro will not be defined. If it is required for a
867 particular target machine, it should return 1 if VALUE corresponds
868 to the operand type represented by the constraint letter C. If C
869 is not defined as an extra constraint, the value returned should
870 be 0 regardless of VALUE.
872 For example, on the ROMP, load instructions cannot have their
873 output in r0 if the memory reference contains a symbolic address.
874 Constraint letter `Q' is defined as representing a memory address
875 that does *not* contain a symbolic address. An alternative is
876 specified with a `Q' constraint on the input and `r' on the
877 output. The next alternative specifies `m' on the input and a
878 register class that does not include r0 on the output. */
880 #define EXTRA_CONSTRAINT(OP, C) \
881 ((C) == 'Q' ? ep_memory_operand (OP, GET_MODE (OP), 0) \
882 : (C) == 'R' ? special_symbolref_operand (OP, VOIDmode) \
883 : (C) == 'S' ? (GET_CODE (OP) == SYMBOL_REF && ! ZDA_NAME_P (XSTR (OP, 0))) \
885 : (C) == 'U' ? ((GET_CODE (OP) == SYMBOL_REF && ZDA_NAME_P (XSTR (OP, 0))) \
886 || (GET_CODE (OP) == CONST \
887 && GET_CODE (XEXP (OP, 0)) == PLUS \
888 && GET_CODE (XEXP (XEXP (OP, 0), 0)) == SYMBOL_REF \
889 && ZDA_NAME_P (XSTR (XEXP (XEXP (OP, 0), 0), 0)))) \
892 /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
893 that is a valid memory address for an instruction.
894 The MODE argument is the machine mode for the MEM expression
895 that wants to use this address.
897 The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS,
898 except for CONSTANT_ADDRESS_P which is actually
899 machine-independent. */
901 /* Accept either REG or SUBREG where a register is valid. */
903 #define RTX_OK_FOR_BASE_P(X) \
904 ((REG_P (X) && REG_OK_FOR_BASE_P (X)) \
905 || (GET_CODE (X) == SUBREG && REG_P (SUBREG_REG (X)) \
906 && REG_OK_FOR_BASE_P (SUBREG_REG (X))))
908 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
910 if (RTX_OK_FOR_BASE_P (X)) goto ADDR; \
911 if (CONSTANT_ADDRESS_P (X) \
912 && (MODE == QImode || INTVAL (X) % 2 == 0) \
913 && (GET_MODE_SIZE (MODE) <= 4 || INTVAL (X) % 4 == 0)) \
915 if (GET_CODE (X) == LO_SUM \
916 && GET_CODE (XEXP (X, 0)) == REG \
917 && REG_OK_FOR_BASE_P (XEXP (X, 0)) \
918 && CONSTANT_P (XEXP (X, 1)) \
919 && (GET_CODE (XEXP (X, 1)) != CONST_INT \
920 || ((MODE == QImode || INTVAL (XEXP (X, 1)) % 2 == 0) \
921 && CONST_OK_FOR_K (INTVAL (XEXP (X, 1))))) \
922 && GET_MODE_SIZE (MODE) <= GET_MODE_SIZE (word_mode)) \
924 if (special_symbolref_operand (X, MODE) \
925 && (GET_MODE_SIZE (MODE) <= GET_MODE_SIZE (word_mode))) \
927 if (GET_CODE (X) == PLUS \
928 && CONSTANT_ADDRESS_P (XEXP (X, 1)) \
929 && (MODE == QImode || INTVAL (XEXP (X, 1)) % 2 == 0) \
930 && RTX_OK_FOR_BASE_P (XEXP (X, 0))) goto ADDR; \
934 /* Try machine-dependent ways of modifying an illegitimate address
935 to be legitimate. If we find one, return the new, valid address.
936 This macro is used in only one place: `memory_address' in explow.c.
938 OLDX is the address as it was before break_out_memory_refs was called.
939 In some cases it is useful to look at this to decide what needs to be done.
941 MODE and WIN are passed so that this macro can use
942 GO_IF_LEGITIMATE_ADDRESS.
944 It is always safe for this macro to do nothing. It exists to recognize
945 opportunities to optimize the output. */
947 #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) {}
949 /* Go to LABEL if ADDR (a legitimate address expression)
950 has an effect that depends on the machine mode it is used for. */
952 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) {}
954 /* Nonzero if the constant value X is a legitimate general operand.
955 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */
957 #define LEGITIMATE_CONSTANT_P(X) \
958 (GET_CODE (X) == CONST_DOUBLE \
959 || !(GET_CODE (X) == CONST \
960 && GET_CODE (XEXP (X, 0)) == PLUS \
961 && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF \
962 && GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT \
963 && ! CONST_OK_FOR_K (INTVAL (XEXP (XEXP (X, 0), 1)))))
965 /* In rare cases, correct code generation requires extra machine
966 dependent processing between the second jump optimization pass and
967 delayed branch scheduling. On those machines, define this macro
968 as a C statement to act on the code starting at INSN. */
970 #define MACHINE_DEPENDENT_REORG(INSN) v850_reorg (INSN)
973 /* Tell final.c how to eliminate redundant test instructions. */
975 /* Here we define machine-dependent flags and fields in cc_status
976 (see `conditions.h'). No extra ones are needed for the VAX. */
978 /* Store in cc_status the expressions
979 that the condition codes will describe
980 after execution of an instruction whose pattern is EXP.
981 Do not alter them if the instruction would not alter the cc's. */
983 #define CC_OVERFLOW_UNUSABLE 0x200
984 #define CC_NO_CARRY CC_NO_OVERFLOW
985 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
987 /* A part of a C `switch' statement that describes the relative costs
988 of constant RTL expressions. It must contain `case' labels for
989 expression codes `const_int', `const', `symbol_ref', `label_ref'
990 and `const_double'. Each case must ultimately reach a `return'
991 statement to return the relative cost of the use of that kind of
992 constant value in an expression. The cost may depend on the
993 precise value of the constant, which is available for examination
994 in X, and the rtx code of the expression in which it is contained,
997 CODE is the expression code--redundant, since it can be obtained
998 with `GET_CODE (X)'. */
1000 #define CONST_COSTS(RTX,CODE,OUTER_CODE) \
1002 case CONST_DOUBLE: \
1007 int _zxy = const_costs(RTX, CODE); \
1008 return (_zxy) ? COSTS_N_INSNS (_zxy) : 0; \
1011 /* A crude cut at RTX_COSTS for the V850. */
1013 /* Provide the costs of a rtl expression. This is in the body of a
1016 There aren't DImode MOD, DIV or MULT operations, so call them
1017 very expensive. Everything else is pretty much a constant cost. */
1019 #define RTX_COSTS(RTX,CODE,OUTER_CODE) \
1026 /* All addressing modes have the same cost on the V850 series. */
1027 #define ADDRESS_COST(ADDR) 1
1029 /* Nonzero if access to memory by bytes or half words is no faster
1030 than accessing full words. */
1031 #define SLOW_BYTE_ACCESS 1
1033 /* Define this if zero-extension is slow (more than one real instruction). */
1034 #define SLOW_ZERO_EXTEND
1036 /* According expr.c, a value of around 6 should minimize code size, and
1037 for the V850 series, that's our primary concern. */
1038 #define MOVE_RATIO 6
1040 /* Indirect calls are expensive, never turn a direct call
1041 into an indirect call. */
1042 #define NO_FUNCTION_CSE
1044 /* The four different data regions on the v850. */
1053 /* A list of names for sections other than the standard two, which are
1054 `in_text' and `in_data'. You need not define this macro on a
1055 system with no other sections (that GCC needs to use). */
1056 #undef EXTRA_SECTIONS
1057 #define EXTRA_SECTIONS in_tdata, in_sdata, in_zdata, in_const, \
1058 in_rozdata, in_rosdata, in_sbss, in_zbss, in_zcommon, in_scommon
1060 /* One or more functions to be defined in `varasm.c'. These
1061 functions should do jobs analogous to those of `text_section' and
1062 `data_section', for your additional sections. Do not define this
1063 macro if you do not define `EXTRA_SECTIONS'. */
1064 #undef EXTRA_SECTION_FUNCTIONS
1066 /* This could be done a lot more cleanly using ANSI C ... */
1067 #define EXTRA_SECTION_FUNCTIONS \
1068 CONST_SECTION_FUNCTION \
1073 if (in_section != in_sdata) \
1075 fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP); \
1076 in_section = in_sdata; \
1081 rosdata_section () \
1083 if (in_section != in_rosdata) \
1085 fprintf (asm_out_file, "%s\n", ROSDATA_SECTION_ASM_OP); \
1086 in_section = in_sdata; \
1093 if (in_section != in_sbss) \
1095 fprintf (asm_out_file, "%s\n", SBSS_SECTION_ASM_OP); \
1096 in_section = in_sbss; \
1103 if (in_section != in_tdata) \
1105 fprintf (asm_out_file, "%s\n", TDATA_SECTION_ASM_OP); \
1106 in_section = in_tdata; \
1113 if (in_section != in_zdata) \
1115 fprintf (asm_out_file, "%s\n", ZDATA_SECTION_ASM_OP); \
1116 in_section = in_zdata; \
1121 rozdata_section () \
1123 if (in_section != in_rozdata) \
1125 fprintf (asm_out_file, "%s\n", ROZDATA_SECTION_ASM_OP); \
1126 in_section = in_rozdata; \
1133 if (in_section != in_zbss) \
1135 fprintf (asm_out_file, "%s\n", ZBSS_SECTION_ASM_OP); \
1136 in_section = in_zbss; \
1140 #define TEXT_SECTION_ASM_OP "\t.section .text"
1141 #define DATA_SECTION_ASM_OP "\t.section .data"
1142 #define BSS_SECTION_ASM_OP "\t.section .bss"
1143 #define SDATA_SECTION_ASM_OP "\t.section .sdata,\"aw\""
1144 #define SBSS_SECTION_ASM_OP "\t.section .sbss,\"aw\""
1145 #define ZDATA_SECTION_ASM_OP "\t.section .zdata,\"aw\""
1146 #define ZBSS_SECTION_ASM_OP "\t.section .zbss,\"aw\""
1147 #define TDATA_SECTION_ASM_OP "\t.section .tdata,\"aw\""
1148 #define ROSDATA_SECTION_ASM_OP "\t.section .rosdata,\"a\""
1149 #define ROZDATA_SECTION_ASM_OP "\t.section .rozdata,\"a\""
1151 #define SCOMMON_ASM_OP "\t.scomm\t"
1152 #define ZCOMMON_ASM_OP "\t.zcomm\t"
1153 #define TCOMMON_ASM_OP "\t.tcomm\t"
1155 /* A C statement or statements to switch to the appropriate section
1156 for output of EXP. You can assume that EXP is either a `VAR_DECL'
1157 node or a constant of some sort. RELOC indicates whether the
1158 initial value of EXP requires link-time relocations. Select the
1159 section by calling `text_section' or one of the alternatives for
1162 Do not define this macro if you put all read-only variables and
1163 constants in the read-only data section (usually the text section). */
1164 #undef SELECT_SECTION
1165 #define SELECT_SECTION(EXP, RELOC, ALIGN) \
1167 if (TREE_CODE (EXP) == VAR_DECL) \
1170 if (!TREE_READONLY (EXP) \
1171 || TREE_SIDE_EFFECTS (EXP) \
1172 || !DECL_INITIAL (EXP) \
1173 || (DECL_INITIAL (EXP) != error_mark_node \
1174 && !TREE_CONSTANT (DECL_INITIAL (EXP)))) \
1179 switch (v850_get_data_area (EXP)) \
1181 case DATA_AREA_ZDA: \
1183 rozdata_section (); \
1188 case DATA_AREA_TDA: \
1192 case DATA_AREA_SDA: \
1194 rosdata_section (); \
1207 else if (TREE_CODE (EXP) == STRING_CST) \
1209 if (! flag_writable_strings) \
1220 /* A C statement or statements to switch to the appropriate section
1221 for output of RTX in mode MODE. You can assume that RTX is some
1222 kind of constant in RTL. The argument MODE is redundant except in
1223 the case of a `const_int' rtx. Select the section by calling
1224 `text_section' or one of the alternatives for other sections.
1226 Do not define this macro if you put all constants in the read-only
1228 /* #define SELECT_RTX_SECTION(MODE, RTX, ALIGN) */
1230 /* Output at beginning/end of assembler file. */
1231 #undef ASM_FILE_START
1232 #define ASM_FILE_START(FILE) asm_file_start(FILE)
1234 #define ASM_COMMENT_START "#"
1236 /* Output to assembler file text saying following lines
1237 may contain character constants, extra white space, comments, etc. */
1239 #define ASM_APP_ON "#APP\n"
1241 /* Output to assembler file text saying following lines
1242 no longer contain unusual constructs. */
1244 #define ASM_APP_OFF "#NO_APP\n"
1246 #undef USER_LABEL_PREFIX
1247 #define USER_LABEL_PREFIX "_"
1249 /* When assemble_integer is used to emit the offsets for a switch
1250 table it can encounter (TRUNCATE:HI (MINUS:SI (LABEL_REF:SI) (LABEL_REF:SI))).
1251 output_addr_const will normally barf at this, but it is OK to omit
1252 the truncate and just emit the difference of the two labels. The
1253 .hword directive will automatically handle the truncation for us. */
1255 #define OUTPUT_ADDR_CONST_EXTRA(FILE, X, FAIL) \
1256 if (GET_CODE (x) == TRUNCATE) \
1257 output_addr_const (FILE, XEXP (X, 0)); \
1261 /* This is how to output an assembler line defining a `double' constant.
1262 It is .double or .float, depending. */
1264 #define ASM_OUTPUT_DOUBLE(FILE, VALUE) \
1265 do { char dstr[30]; \
1266 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", dstr); \
1267 fprintf (FILE, "\t.double %s\n", dstr); \
1271 /* This is how to output an assembler line defining a `float' constant. */
1272 #define ASM_OUTPUT_FLOAT(FILE, VALUE) \
1273 do { char dstr[30]; \
1274 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", dstr); \
1275 fprintf (FILE, "\t.float %s\n", dstr); \
1278 /* This says how to output the assembler to define a global
1279 uninitialized but not common symbol. */
1281 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
1282 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
1284 #undef ASM_OUTPUT_ALIGNED_BSS
1285 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
1286 v850_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
1288 /* This says how to output the assembler to define a global
1289 uninitialized, common symbol. */
1290 #undef ASM_OUTPUT_ALIGNED_COMMON
1291 #undef ASM_OUTPUT_COMMON
1292 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
1293 v850_output_common (FILE, DECL, NAME, SIZE, ALIGN)
1295 /* This says how to output the assembler to define a local
1296 uninitialized symbol. */
1297 #undef ASM_OUTPUT_ALIGNED_LOCAL
1298 #undef ASM_OUTPUT_LOCAL
1299 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
1300 v850_output_local (FILE, DECL, NAME, SIZE, ALIGN)
1302 /* This is how to output the definition of a user-level label named NAME,
1303 such as the label on a static function or variable NAME. */
1305 #define ASM_OUTPUT_LABEL(FILE, NAME) \
1306 do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
1308 /* This is how to output a command to make the user-level label named NAME
1309 defined for reference from other files. */
1311 #define ASM_GLOBALIZE_LABEL(FILE, NAME) \
1314 fputs ("\t.global ", FILE); \
1315 assemble_name (FILE, NAME); \
1316 fputs ("\n", FILE); \
1320 /* This is how to output a reference to a user-level label named NAME.
1321 `assemble_name' uses this. */
1323 #undef ASM_OUTPUT_LABELREF
1324 #define ASM_OUTPUT_LABELREF(FILE, NAME) \
1326 const char* real_name; \
1327 STRIP_NAME_ENCODING (real_name, (NAME)); \
1328 asm_fprintf (FILE, "%U%s", real_name); \
1332 /* Store in OUTPUT a string (made with alloca) containing
1333 an assembler-name for a local static variable named NAME.
1334 LABELNO is an integer which is different for each call. */
1336 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
1337 ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \
1338 sprintf ((OUTPUT), "%s___%d", (NAME), (LABELNO)))
1340 /* This is how we tell the assembler that two symbols have the same value. */
1342 #define ASM_OUTPUT_DEF(FILE,NAME1,NAME2) \
1343 do { assemble_name(FILE, NAME1); \
1344 fputs(" = ", FILE); \
1345 assemble_name(FILE, NAME2); \
1346 fputc('\n', FILE); } while (0)
1349 /* How to refer to registers in assembler output.
1350 This sequence is indexed by compiler's hard-register-number (see above). */
1352 #define REGISTER_NAMES \
1353 { "r0", "r1", "r2", "sp", "gp", "r5", "r6" , "r7", \
1354 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
1355 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
1356 "r24", "r25", "r26", "r27", "r28", "r29", "ep", "r31", \
1359 #define ADDITIONAL_REGISTER_NAMES \
1369 /* Print an instruction operand X on file FILE.
1370 look in v850.c for details */
1372 #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE)
1374 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
1377 /* Print a memory operand whose address is X, on file FILE.
1378 This uses a function in output-vax.c. */
1380 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR)
1382 #define ASM_OUTPUT_REG_PUSH(FILE,REGNO)
1383 #define ASM_OUTPUT_REG_POP(FILE,REGNO)
1385 /* This is how to output an element of a case-vector that is absolute. */
1387 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
1388 asm_fprintf (FILE, "\t%s .L%d\n", \
1389 (TARGET_BIG_SWITCH ? ".long" : ".short"), VALUE)
1391 /* This is how to output an element of a case-vector that is relative. */
1393 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
1394 fprintf (FILE, "\t%s .L%d-.L%d\n", \
1395 (TARGET_BIG_SWITCH ? ".long" : ".short"), \
1398 #define ASM_OUTPUT_ALIGN(FILE, LOG) \
1400 fprintf (FILE, "\t.align %d\n", (LOG))
1402 /* We don't have to worry about dbx compatibility for the v850. */
1403 #define DEFAULT_GDB_EXTENSIONS 1
1405 /* Use stabs debugging info by default. */
1406 #undef PREFERRED_DEBUGGING_TYPE
1407 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
1409 /* Define to use software floating point emulator for REAL_ARITHMETIC and
1410 decimal <-> binary conversion. */
1411 #define REAL_ARITHMETIC
1413 /* Specify the machine mode that this machine uses
1414 for the index in the tablejump instruction. */
1415 #define CASE_VECTOR_MODE (TARGET_BIG_SWITCH ? SImode : HImode)
1417 /* Define this if the case instruction drops through after the table
1418 when the index is out of range. Don't define it if the case insn
1419 jumps to the default label instead. */
1420 /* #define CASE_DROPS_THROUGH */
1422 /* Define as C expression which evaluates to nonzero if the tablejump
1423 instruction expects the table to contain offsets from the address of the
1425 Do not define this if the table should contain absolute addresses. */
1426 #define CASE_VECTOR_PC_RELATIVE 1
1428 /* The switch instruction requires that the jump table immediately follow
1430 #define JUMP_TABLES_IN_TEXT_SECTION 1
1432 /* svr4.h defines this assuming that 4 byte alignment is required. */
1433 #undef ASM_OUTPUT_BEFORE_CASE_LABEL
1434 #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \
1435 ASM_OUTPUT_ALIGN ((FILE), (TARGET_BIG_SWITCH ? 2 : 1));
1437 #define WORD_REGISTER_OPERATIONS
1439 /* Byte and short loads sign extend the value to a word. */
1440 #define LOAD_EXTEND_OP(MODE) SIGN_EXTEND
1442 /* Specify the tree operation to be used to convert reals to integers. */
1443 #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
1445 /* This flag, if defined, says the same insns that convert to a signed fixnum
1446 also convert validly to an unsigned one. */
1447 #define FIXUNS_TRUNC_LIKE_FIX_TRUNC
1449 /* This is the kind of divide that is easiest to do in the general case. */
1450 #define EASY_DIV_EXPR TRUNC_DIV_EXPR
1452 /* Max number of bytes we can move from memory to memory
1453 in one reasonably fast instruction. */
1456 /* Define if shifts truncate the shift count
1457 which implies one can omit a sign-extension or zero-extension
1458 of a shift count. */
1459 #define SHIFT_COUNT_TRUNCATED 1
1461 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
1462 is done just by pretending it is already truncated. */
1463 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1465 #define STORE_FLAG_VALUE 1
1467 /* Specify the machine mode that pointers have.
1468 After generation of rtl, the compiler makes no further distinction
1469 between pointers and any other objects of this machine mode. */
1470 #define Pmode SImode
1472 /* A function address in a call instruction
1473 is a byte address (for indexing purposes)
1474 so give the MEM rtx a byte's mode. */
1475 #define FUNCTION_MODE QImode
1477 /* Tell compiler we want to support GHS pragmas */
1478 #define REGISTER_TARGET_PRAGMAS(PFILE) do { \
1479 cpp_register_pragma (PFILE, "ghs", "interrupt", ghs_pragma_interrupt); \
1480 cpp_register_pragma (PFILE, "ghs", "section", ghs_pragma_section); \
1481 cpp_register_pragma (PFILE, "ghs", "starttda", ghs_pragma_starttda); \
1482 cpp_register_pragma (PFILE, "ghs", "startsda", ghs_pragma_startsda); \
1483 cpp_register_pragma (PFILE, "ghs", "startzda", ghs_pragma_startzda); \
1484 cpp_register_pragma (PFILE, "ghs", "endtda", ghs_pragma_endtda); \
1485 cpp_register_pragma (PFILE, "ghs", "endsda", ghs_pragma_endsda); \
1486 cpp_register_pragma (PFILE, "ghs", "endzda", ghs_pragma_endzda); \
1489 /* enum GHS_SECTION_KIND is an enumeration of the kinds of sections that
1490 can appear in the "ghs section" pragma. These names are used to index
1491 into the GHS_default_section_names[] and GHS_current_section_names[]
1492 that are defined in v850.c, and so the ordering of each must remain
1495 These arrays give the default and current names for each kind of
1496 section defined by the GHS pragmas. The current names can be changed
1497 by the "ghs section" pragma. If the current names are null, use
1498 the default names. Note that the two arrays have different types.
1500 For the *normal* section kinds (like .data, .text, etc.) we do not
1501 want to explicitly force the name of these sections, but would rather
1502 let the linker (or at least the back end) choose the name of the
1503 section, UNLESS the user has force a specific name for these section
1504 kinds. To accomplish this set the name in ghs_default_section_names
1507 enum GHS_section_kind
1509 GHS_SECTION_KIND_DEFAULT,
1511 GHS_SECTION_KIND_TEXT,
1512 GHS_SECTION_KIND_DATA,
1513 GHS_SECTION_KIND_RODATA,
1514 GHS_SECTION_KIND_BSS,
1515 GHS_SECTION_KIND_SDATA,
1516 GHS_SECTION_KIND_ROSDATA,
1517 GHS_SECTION_KIND_TDATA,
1518 GHS_SECTION_KIND_ZDATA,
1519 GHS_SECTION_KIND_ROZDATA,
1521 COUNT_OF_GHS_SECTION_KINDS /* must be last */
1524 /* The following code is for handling pragmas supported by the
1525 v850 compiler produced by Green Hills Software. This is at
1526 the specific request of a customer. */
1528 typedef struct data_area_stack_element
1530 struct data_area_stack_element * prev;
1531 v850_data_area data_area; /* Current default data area. */
1532 } data_area_stack_element;
1534 /* Track the current data area set by the
1535 data area pragma (which can be nested). */
1536 extern data_area_stack_element * data_area_stack;
1538 /* Names of the various data areas used on the v850. */
1539 extern union tree_node * GHS_default_section_names [(int) COUNT_OF_GHS_SECTION_KINDS];
1540 extern union tree_node * GHS_current_section_names [(int) COUNT_OF_GHS_SECTION_KINDS];
1542 /* The assembler op to start the file. */
1544 #define FILE_ASM_OP "\t.file\n"
1546 /* Enable the register move pass to improve code. */
1547 #define ENABLE_REGMOVE_PASS
1550 /* Implement ZDA, TDA, and SDA */
1552 #define EP_REGNUM 30 /* ep register number */
1554 #define ENCODE_SECTION_INFO(DECL) \
1557 if (TREE_CODE (DECL) == VAR_DECL \
1558 && (TREE_STATIC (DECL) || DECL_EXTERNAL (DECL))) \
1559 v850_encode_data_area (DECL); \
1563 #define ZDA_NAME_FLAG_CHAR '@'
1564 #define TDA_NAME_FLAG_CHAR '%'
1565 #define SDA_NAME_FLAG_CHAR '&'
1567 #define ZDA_NAME_P(NAME) (*(NAME) == ZDA_NAME_FLAG_CHAR)
1568 #define TDA_NAME_P(NAME) (*(NAME) == TDA_NAME_FLAG_CHAR)
1569 #define SDA_NAME_P(NAME) (*(NAME) == SDA_NAME_FLAG_CHAR)
1571 #define ENCODED_NAME_P(SYMBOL_NAME) \
1572 ( ZDA_NAME_P (SYMBOL_NAME) \
1573 || TDA_NAME_P (SYMBOL_NAME) \
1574 || SDA_NAME_P (SYMBOL_NAME))
1576 #define STRIP_NAME_ENCODING(VAR, SYMBOL_NAME) \
1577 (VAR) = (SYMBOL_NAME) + (ENCODED_NAME_P (SYMBOL_NAME) || *(SYMBOL_NAME) == '*')
1579 /* Define this if you have defined special-purpose predicates in the
1580 file `MACHINE.c'. This macro is called within an initializer of an
1581 array of structures. The first field in the structure is the name
1582 of a predicate and the second field is an array of rtl codes. For
1583 each predicate, list all rtl codes that can be in expressions
1584 matched by the predicate. The list should have a trailing comma. */
1586 #define PREDICATE_CODES \
1587 { "reg_or_0_operand", { REG, SUBREG, CONST_INT, CONST_DOUBLE }}, \
1588 { "reg_or_int5_operand", { REG, SUBREG, CONST_INT }}, \
1589 { "call_address_operand", { REG, SYMBOL_REF }}, \
1590 { "movsi_source_operand", { LABEL_REF, SYMBOL_REF, CONST_INT, \
1591 CONST_DOUBLE, CONST, HIGH, MEM, \
1593 { "special_symbolref_operand", { SYMBOL_REF }}, \
1594 { "power_of_two_operand", { CONST_INT }}, \
1595 { "pattern_is_ok_for_prologue", { PARALLEL }}, \
1596 { "pattern_is_ok_for_epilogue", { PARALLEL }}, \
1597 { "register_is_ok_for_epilogue",{ REG }}, \
1598 { "not_power_of_two_operand", { CONST_INT }},
1600 #endif /* ! GCC_V850_H */