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 */
24 /* These are defiend in svr4.h but we want to override them. */
33 #define TARGET_CPU_generic 1
35 #ifndef TARGET_CPU_DEFAULT
36 #define TARGET_CPU_DEFAULT TARGET_CPU_generic
39 #define MASK_DEFAULT MASK_V850
40 #define SUBTARGET_ASM_SPEC "%{!mv*:-mv850}"
41 #define SUBTARGET_CPP_SPEC "%{!mv*:-D__v850__}"
42 #define TARGET_VERSION fprintf (stderr, " (NEC V850)");
45 #define ASM_SPEC "%{mv*:-mv%*}"
46 #define CPP_SPEC "%{mv850ea:-D__v850ea__} %{mv850e:-D__v850e__} %{mv850:-D__v850__} %(subtarget_cpp_spec)"
49 { "subtarget_asm_spec", SUBTARGET_ASM_SPEC }, \
50 { "subtarget_cpp_spec", SUBTARGET_CPP_SPEC }
52 /* Names to predefine in the preprocessor for this target machine. */
53 #define CPP_PREDEFINES "-D__v851__ -D__v850"
55 /* Run-time compilation parameters selecting different hardware subsets. */
57 extern int target_flags;
59 /* Target flags bits, see below for an explanation of the bits. */
60 #define MASK_GHS 0x00000001
61 #define MASK_LONG_CALLS 0x00000002
62 #define MASK_EP 0x00000004
63 #define MASK_PROLOG_FUNCTION 0x00000008
64 #define MASK_DEBUG 0x40000000
66 #define MASK_CPU 0x00000030
67 #define MASK_V850 0x00000010
69 #define MASK_BIG_SWITCH 0x00000100
71 /* Macros used in the machine description to test the flags. */
73 /* The GHS calling convention support doesn't really work,
74 mostly due to a lack of documentation. Outstanding issues:
76 * How do varargs & stdarg really work. How to they handle
77 passing structures (if at all).
79 * Doubles are normally 4 byte aligned, except in argument
80 lists where they are 8 byte aligned. Is the alignment
81 in the argument list based on the first parameter,
82 first stack parameter, etc etc.
84 * Passing/returning of large structures probably isn't the same
85 as GHS. We don't have enough documentation on their conventions
88 * Tests of SETUP_INCOMING_VARARGS need to be made runtime checks
89 since it depends on TARGET_GHS. */
90 #define TARGET_GHS (target_flags & MASK_GHS)
92 /* Don't do PC-relative calls, instead load the address of the target
93 function into a register and perform a register indirect call. */
94 #define TARGET_LONG_CALLS (target_flags & MASK_LONG_CALLS)
96 /* Whether to optimize space by using ep (r30) for pointers with small offsets
98 #define TARGET_EP (target_flags & MASK_EP)
100 /* Whether to call out-of-line functions to save registers or not. */
101 #define TARGET_PROLOG_FUNCTION (target_flags & MASK_PROLOG_FUNCTION)
103 #define TARGET_V850 ((target_flags & MASK_CPU) == MASK_V850)
105 /* Whether to emit 2 byte per entry or 4 byte per entry switch tables. */
106 #define TARGET_BIG_SWITCH (target_flags & MASK_BIG_SWITCH)
108 /* General debug flag */
109 #define TARGET_DEBUG (target_flags & MASK_DEBUG)
111 /* Macro to define tables used to set the flags.
112 This is a list in braces of pairs in braces,
113 each pair being { "NAME", VALUE }
114 where VALUE is the bits to set or minus the bits to clear.
115 An empty string NAME is used to identify the default VALUE. */
117 #define TARGET_SWITCHES \
118 {{ "ghs", MASK_GHS, "Support Green Hills ABI" }, \
119 { "no-ghs", -MASK_GHS, "" }, \
120 { "long-calls", MASK_LONG_CALLS, \
121 "Prohibit PC relative function calls" },\
122 { "no-long-calls", -MASK_LONG_CALLS, "" }, \
124 "Reuse r30 on a per function basis" }, \
125 { "no-ep", -MASK_EP, "" }, \
126 { "prolog-function", MASK_PROLOG_FUNCTION, \
127 "Use stubs for function prologues" }, \
128 { "no-prolog-function", -MASK_PROLOG_FUNCTION, "" }, \
129 { "space", MASK_EP | MASK_PROLOG_FUNCTION, \
130 "Same as: -mep -mprolog-function" }, \
131 { "debug", MASK_DEBUG, "Enable backend debugging" }, \
132 { "v850", MASK_V850, \
133 "Compile for the v850 processor" }, \
134 { "v850", -(MASK_V850 ^ MASK_CPU), "" }, \
135 { "big-switch", MASK_BIG_SWITCH, \
136 "Use 4 byte entries in switch tables" },\
137 { "", MASK_DEFAULT, ""}}
139 /* Information about the various small memory areas. */
140 struct small_memory_info {
147 enum small_memory_type {
148 /* tiny data area, using EP as base register */
149 SMALL_MEMORY_TDA = 0,
150 /* small data area using dp as base register */
152 /* zero data area using r0 as base register */
157 extern struct small_memory_info small_memory[(int)SMALL_MEMORY_max];
159 /* This macro is similar to `TARGET_SWITCHES' but defines names of
160 command options that have values. Its definition is an
161 initializer with a subgrouping for each command option.
163 Each subgrouping contains a string constant, that defines the
164 fixed part of the option name, and the address of a variable. The
165 variable, type `char *', is set to the variable part of the given
166 option if the fixed part matches. The actual option name is made
167 by appending `-m' to the specified name.
169 Here is an example which defines `-mshort-data-NUMBER'. If the
170 given option is `-mshort-data-512', the variable `m88k_short_data'
171 will be set to the string `"512"'.
173 extern char *m88k_short_data;
174 #define TARGET_OPTIONS \
175 { { "short-data-", &m88k_short_data } } */
177 #define TARGET_OPTIONS \
179 { "tda=", &small_memory[ (int)SMALL_MEMORY_TDA ].value, \
180 "Set the max size of data eligible for the TDA area" }, \
181 { "tda-", &small_memory[ (int)SMALL_MEMORY_TDA ].value, "" }, \
182 { "sda=", &small_memory[ (int)SMALL_MEMORY_SDA ].value, \
183 "Set the max size of data eligible for the SDA area" }, \
184 { "sda-", &small_memory[ (int)SMALL_MEMORY_SDA ].value, "" }, \
185 { "zda=", &small_memory[ (int)SMALL_MEMORY_ZDA ].value, \
186 "Set the max size of data eligible for the ZDA area" }, \
187 { "zda-", &small_memory[ (int)SMALL_MEMORY_ZDA ].value, "" }, \
190 /* Sometimes certain combinations of command options do not make
191 sense on a particular target machine. You can define a macro
192 `OVERRIDE_OPTIONS' to take account of this. This macro, if
193 defined, is executed once just after all the command options have
196 Don't use this macro to turn on various extra optimizations for
197 `-O'. That is what `OPTIMIZATION_OPTIONS' is for. */
198 #define OVERRIDE_OPTIONS override_options ()
201 /* Show we can debug even without a frame pointer. */
202 #define CAN_DEBUG_WITHOUT_FP
204 /* Some machines may desire to change what optimizations are
205 performed for various optimization levels. This macro, if
206 defined, is executed once just after the optimization level is
207 determined and before the remainder of the command options have
208 been parsed. Values set in this macro are used as the default
209 values for the other command line options.
211 LEVEL is the optimization level specified; 2 if `-O2' is
212 specified, 1 if `-O' is specified, and 0 if neither is specified.
214 SIZE is non-zero if `-Os' is specified, 0 otherwise.
216 You should not use this macro to change options that are not
217 machine-specific. These should uniformly selected by the same
218 optimization level on all supported machines. Use this macro to
219 enable machine-specific optimizations.
221 *Do not examine `write_symbols' in this macro!* The debugging
222 options are not supposed to alter the generated code. */
224 #define OPTIMIZATION_OPTIONS(LEVEL,SIZE) \
227 target_flags |= (MASK_EP | MASK_PROLOG_FUNCTION); \
231 /* Target machine storage layout */
233 /* Define this if most significant bit is lowest numbered
234 in instructions that operate on numbered bit-fields.
235 This is not true on the NEC V850. */
236 #define BITS_BIG_ENDIAN 0
238 /* Define this if most significant byte of a word is the lowest numbered. */
239 /* This is not true on the NEC V850. */
240 #define BYTES_BIG_ENDIAN 0
242 /* Define this if most significant word of a multiword number is lowest
244 This is not true on the NEC V850. */
245 #define WORDS_BIG_ENDIAN 0
247 /* Number of bits in an addressable storage unit */
248 #define BITS_PER_UNIT 8
250 /* Width in bits of a "word", which is the contents of a machine register.
251 Note that this is not necessarily the width of data type `int';
252 if using 16-bit ints on a 68000, this would still be 32.
253 But on a machine with 16-bit registers, this would be 16. */
254 #define BITS_PER_WORD 32
256 /* Width of a word, in units (bytes). */
257 #define UNITS_PER_WORD 4
259 /* Width in bits of a pointer.
260 See also the macro `Pmode' defined below. */
261 #define POINTER_SIZE 32
263 /* Define this macro if it is advisable to hold scalars in registers
264 in a wider mode than that declared by the program. In such cases,
265 the value is constrained to be within the bounds of the declared
266 type, but kept valid in the wider mode. The signedness of the
267 extension may differ from that of the type.
269 Some simple experiments have shown that leaving UNSIGNEDP alone
270 generates the best overall code. */
272 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
273 if (GET_MODE_CLASS (MODE) == MODE_INT \
274 && GET_MODE_SIZE (MODE) < 4) \
277 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
278 #define PARM_BOUNDARY 32
280 /* The stack goes in 32 bit lumps. */
281 #define STACK_BOUNDARY 32
283 /* Allocation boundary (in *bits*) for the code of a function.
284 16 is the minimum boundary; 32 would give better performance. */
285 #define FUNCTION_BOUNDARY 16
287 /* No data type wants to be aligned rounder than this. */
288 #define BIGGEST_ALIGNMENT 32
290 /* Alignment of field after `int : 0' in a structure. */
291 #define EMPTY_FIELD_BOUNDARY 32
293 /* No structure field wants to be aligned rounder than this. */
294 #define BIGGEST_FIELD_ALIGNMENT 32
296 /* Define this if move instructions will actually fail to work
297 when given unaligned data. */
298 #ifndef STRICT_ALIGNMENT
299 #define STRICT_ALIGNMENT TARGET_V850
302 /* Define this as 1 if `char' should by default be signed; else as 0.
304 On the NEC V850, loads do sign extension, so make this default. */
305 #define DEFAULT_SIGNED_CHAR 1
307 /* Define results of standard character escape sequences. */
308 #define TARGET_BELL 007
309 #define TARGET_BS 010
310 #define TARGET_TAB 011
311 #define TARGET_NEWLINE 012
312 #define TARGET_VT 013
313 #define TARGET_FF 014
314 #define TARGET_CR 015
316 /* Standard register usage. */
318 /* Number of actual hardware registers.
319 The hardware registers are assigned numbers for the compiler
320 from 0 to just below FIRST_PSEUDO_REGISTER.
322 All registers that the compiler knows about must be given numbers,
323 even those that are not normally considered general registers. */
325 #define FIRST_PSEUDO_REGISTER 34
327 /* 1 for registers that have pervasive standard uses
328 and are not available for the register allocator. */
330 #define FIXED_REGISTERS \
331 { 1, 1, 0, 1, 1, 0, 0, 0, \
332 0, 0, 0, 0, 0, 0, 0, 0, \
333 0, 0, 0, 0, 0, 0, 0, 0, \
334 0, 0, 0, 0, 0, 0, 1, 0, \
337 /* 1 for registers not available across function calls.
338 These must include the FIXED_REGISTERS and also any
339 registers that can be used without being saved.
340 The latter must include the registers where values are returned
341 and the register where structure-value addresses are passed.
342 Aside from that, you can include as many other registers as you
345 #define CALL_USED_REGISTERS \
346 { 1, 1, 0, 1, 1, 1, 1, 1, \
347 1, 1, 1, 1, 1, 1, 1, 1, \
348 1, 1, 1, 1, 0, 0, 0, 0, \
349 0, 0, 0, 0, 0, 0, 1, 1, \
352 /* List the order in which to allocate registers. Each register must be
353 listed once, even those in FIXED_REGISTERS.
355 On the 850, we make the return registers first, then all of the volatile
356 registers, then the saved registers in reverse order to better save the
357 registers with an out of line function, and finally the fixed
360 #define REG_ALLOC_ORDER \
362 10, 11, /* return registers */ \
363 12, 13, 14, 15, 16, 17, 18, 19, /* scratch registers */ \
364 6, 7, 8, 9, 31, /* argument registers */ \
365 29, 28, 27, 26, 25, 24, 23, 22, /* saved registers */ \
367 0, 1, 3, 4, 5, 30, 32, 33 /* fixed registers */ \
370 /* Return number of consecutive hard regs needed starting at reg REGNO
371 to hold something of mode MODE.
373 This is ordinarily the length in words of a value of mode MODE
374 but can be less for certain modes in special long registers. */
376 #define HARD_REGNO_NREGS(REGNO, MODE) \
377 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
379 /* Value is 1 if hard register REGNO can hold a value of machine-mode
382 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
383 ((((REGNO) & 1) == 0) || (GET_MODE_SIZE (MODE) <= 4))
385 /* Value is 1 if it is a good idea to tie two pseudo registers
386 when one has mode MODE1 and one has mode MODE2.
387 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
388 for any hard reg, then this must be 0 for correct output. */
389 #define MODES_TIEABLE_P(MODE1, MODE2) \
390 (MODE1 == MODE2 || GET_MODE_SIZE (MODE1) <= 4 && GET_MODE_SIZE (MODE2) <= 4)
393 /* Define the classes of registers for register constraints in the
394 machine description. Also define ranges of constants.
396 One of the classes must always be named ALL_REGS and include all hard regs.
397 If there is more than one class, another class must be named NO_REGS
398 and contain no registers.
400 The name GENERAL_REGS must be the name of a class (or an alias for
401 another name such as ALL_REGS). This is the class of registers
402 that is allowed by "g" or "r" in a register constraint.
403 Also, registers outside this class are allocated only when
404 instructions express preferences for them.
406 The classes must be numbered in nondecreasing order; that is,
407 a larger-numbered class must never be contained completely
408 in a smaller-numbered class.
410 For any two classes, it is very desirable that there be another
411 class that represents their union. */
415 NO_REGS, GENERAL_REGS, ALL_REGS, LIM_REG_CLASSES
418 #define N_REG_CLASSES (int) LIM_REG_CLASSES
420 /* Give names of register classes as strings for dump file. */
422 #define REG_CLASS_NAMES \
423 { "NO_REGS", "GENERAL_REGS", "ALL_REGS", "LIM_REGS" }
425 /* Define which registers fit in which classes.
426 This is an initializer for a vector of HARD_REG_SET
427 of length N_REG_CLASSES. */
429 #define REG_CLASS_CONTENTS \
430 { 0x00000000, /* No regs */ \
431 0xffffffff, /* GENERAL_REGS */ \
432 0xffffffff, /* ALL_REGS */ \
435 /* The same information, inverted:
436 Return the class number of the smallest class containing
437 reg number REGNO. This could be a conditional expression
438 or could index an array. */
440 #define REGNO_REG_CLASS(REGNO) GENERAL_REGS
442 /* The class value for index registers, and the one for base regs. */
444 #define INDEX_REG_CLASS NO_REGS
445 #define BASE_REG_CLASS GENERAL_REGS
447 /* Get reg_class from a letter such as appears in the machine description. */
449 #define REG_CLASS_FROM_LETTER(C) (NO_REGS)
451 /* Macros to check register numbers against specific register classes. */
453 /* These assume that REGNO is a hard or pseudo reg number.
454 They give nonzero only if REGNO is a hard reg of the suitable class
455 or a pseudo reg currently allocated to a suitable hard reg.
456 Since they use reg_renumber, they are safe only once reg_renumber
457 has been allocated, which happens in local-alloc.c. */
459 #define REGNO_OK_FOR_BASE_P(regno) \
460 ((regno) < FIRST_PSEUDO_REGISTER || reg_renumber[regno] >= 0)
462 #define REGNO_OK_FOR_INDEX_P(regno) 0
464 /* Given an rtx X being reloaded into a reg required to be
465 in class CLASS, return the class of reg to actually use.
466 In general this is just CLASS; but on some machines
467 in some cases it is preferable to use a more restrictive class. */
469 #define PREFERRED_RELOAD_CLASS(X,CLASS) (CLASS)
471 /* Return the maximum number of consecutive registers
472 needed to represent mode MODE in a register of class CLASS. */
474 #define CLASS_MAX_NREGS(CLASS, MODE) \
475 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
477 /* The letters I, J, K, L, M, N, O, P in a register constraint string
478 can be used to stand for particular ranges of immediate operands.
479 This macro defines what the ranges are.
480 C is the letter, and VALUE is a constant value.
481 Return 1 if VALUE is in the range specified by C. */
483 #define INT_7_BITS(VALUE) ((unsigned) (VALUE) + 0x40 < 0x80)
484 #define INT_8_BITS(VALUE) ((unsigned) (VALUE) + 0x80 < 0x100)
486 #define CONST_OK_FOR_I(VALUE) ((VALUE) == 0)
487 /* 5 bit signed immediate */
488 #define CONST_OK_FOR_J(VALUE) ((unsigned) (VALUE) + 0x10 < 0x20)
489 /* 16 bit signed immediate */
490 #define CONST_OK_FOR_K(VALUE) ((unsigned) (VALUE) + 0x8000 < 0x10000)
491 /* valid constant for movhi instruction. */
492 #define CONST_OK_FOR_L(VALUE) \
493 (((unsigned) ((int) (VALUE) >> 16) + 0x8000 < 0x10000) \
494 && CONST_OK_FOR_I ((VALUE & 0xffff)))
495 /* 16 bit unsigned immediate */
496 #define CONST_OK_FOR_M(VALUE) ((unsigned)(VALUE) < 0x10000)
497 /* 5 bit unsigned immediate in shift instructions */
498 #define CONST_OK_FOR_N(VALUE) ((unsigned) (VALUE) <= 31)
500 #define CONST_OK_FOR_O(VALUE) 0
501 #define CONST_OK_FOR_P(VALUE) 0
504 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
505 ((C) == 'I' ? CONST_OK_FOR_I (VALUE) : \
506 (C) == 'J' ? CONST_OK_FOR_J (VALUE) : \
507 (C) == 'K' ? CONST_OK_FOR_K (VALUE) : \
508 (C) == 'L' ? CONST_OK_FOR_L (VALUE) : \
509 (C) == 'M' ? CONST_OK_FOR_M (VALUE) : \
510 (C) == 'N' ? CONST_OK_FOR_N (VALUE) : \
511 (C) == 'O' ? CONST_OK_FOR_O (VALUE) : \
512 (C) == 'P' ? CONST_OK_FOR_P (VALUE) : \
515 /* Similar, but for floating constants, and defining letters G and H.
516 Here VALUE is the CONST_DOUBLE rtx itself.
518 `G' is a zero of some form. */
520 #define CONST_DOUBLE_OK_FOR_G(VALUE) \
521 ((GET_MODE_CLASS (GET_MODE (VALUE)) == MODE_FLOAT \
522 && (VALUE) == CONST0_RTX (GET_MODE (VALUE))) \
523 || (GET_MODE_CLASS (GET_MODE (VALUE)) == MODE_INT \
524 && CONST_DOUBLE_LOW (VALUE) == 0 \
525 && CONST_DOUBLE_HIGH (VALUE) == 0))
527 #define CONST_DOUBLE_OK_FOR_H(VALUE) 0
529 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
530 ((C) == 'G' ? CONST_DOUBLE_OK_FOR_G (VALUE) \
531 : (C) == 'H' ? CONST_DOUBLE_OK_FOR_H (VALUE) \
535 /* Stack layout; function entry, exit and calling. */
537 /* Define this if pushing a word on the stack
538 makes the stack pointer a smaller address. */
540 #define STACK_GROWS_DOWNWARD
542 /* Define this if the nominal address of the stack frame
543 is at the high-address end of the local variables;
544 that is, each additional local variable allocated
545 goes at a more negative offset in the frame. */
547 #define FRAME_GROWS_DOWNWARD
549 /* Offset within stack frame to start allocating local variables at.
550 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
551 first local allocated. Otherwise, it is the offset to the BEGINNING
552 of the first local allocated. */
554 #define STARTING_FRAME_OFFSET 0
556 /* Offset of first parameter from the argument pointer register value. */
557 /* Is equal to the size of the saved fp + pc, even if an fp isn't
558 saved since the value is used before we know. */
560 #define FIRST_PARM_OFFSET(FNDECL) 0
562 /* Specify the registers used for certain standard purposes.
563 The values of these macros are register numbers. */
565 /* Register to use for pushing function arguments. */
566 #define STACK_POINTER_REGNUM 3
568 /* Base register for access to local variables of the function. */
569 #define FRAME_POINTER_REGNUM 32
571 /* Register containing return address from latest function call. */
572 #define LINK_POINTER_REGNUM 31
574 /* On some machines the offset between the frame pointer and starting
575 offset of the automatic variables is not known until after register
576 allocation has been done (for example, because the saved registers
577 are between these two locations). On those machines, define
578 `FRAME_POINTER_REGNUM' the number of a special, fixed register to
579 be used internally until the offset is known, and define
580 `HARD_FRAME_POINTER_REGNUM' to be actual the hard register number
581 used for the frame pointer.
583 You should define this macro only in the very rare circumstances
584 when it is not possible to calculate the offset between the frame
585 pointer and the automatic variables until after register
586 allocation has been completed. When this macro is defined, you
587 must also indicate in your definition of `ELIMINABLE_REGS' how to
588 eliminate `FRAME_POINTER_REGNUM' into either
589 `HARD_FRAME_POINTER_REGNUM' or `STACK_POINTER_REGNUM'.
591 Do not define this macro if it would be the same as
592 `FRAME_POINTER_REGNUM'. */
593 #undef HARD_FRAME_POINTER_REGNUM
594 #define HARD_FRAME_POINTER_REGNUM 29
596 /* Base register for access to arguments of the function. */
597 #define ARG_POINTER_REGNUM 33
599 /* Register in which static-chain is passed to a function. */
600 #define STATIC_CHAIN_REGNUM 20
602 /* Value should be nonzero if functions must have frame pointers.
603 Zero means the frame pointer need not be set up (and parms
604 may be accessed via the stack pointer) in functions that seem suitable.
605 This is computed in `reload', in reload1.c. */
606 #define FRAME_POINTER_REQUIRED 0
608 /* If defined, this macro specifies a table of register pairs used to
609 eliminate unneeded registers that point into the stack frame. If
610 it is not defined, the only elimination attempted by the compiler
611 is to replace references to the frame pointer with references to
614 The definition of this macro is a list of structure
615 initializations, each of which specifies an original and
616 replacement register.
618 On some machines, the position of the argument pointer is not
619 known until the compilation is completed. In such a case, a
620 separate hard register must be used for the argument pointer.
621 This register can be eliminated by replacing it with either the
622 frame pointer or the argument pointer, depending on whether or not
623 the frame pointer has been eliminated.
625 In this case, you might specify:
626 #define ELIMINABLE_REGS \
627 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
628 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
629 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
631 Note that the elimination of the argument pointer with the stack
632 pointer is specified first since that is the preferred elimination. */
634 #define ELIMINABLE_REGS \
635 {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
636 { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM }, \
637 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
638 { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM }} \
640 /* A C expression that returns non-zero if the compiler is allowed to
641 try to replace register number FROM-REG with register number
642 TO-REG. This macro need only be defined if `ELIMINABLE_REGS' is
643 defined, and will usually be the constant 1, since most of the
644 cases preventing register elimination are things that the compiler
645 already knows about. */
647 #define CAN_ELIMINATE(FROM, TO) \
648 ((TO) == STACK_POINTER_REGNUM ? ! frame_pointer_needed : 1)
650 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It
651 specifies the initial difference between the specified pair of
652 registers. This macro must be defined if `ELIMINABLE_REGS' is
655 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
657 if ((FROM) == FRAME_POINTER_REGNUM) \
658 (OFFSET) = get_frame_size () + current_function_outgoing_args_size; \
659 else if ((FROM) == ARG_POINTER_REGNUM) \
660 (OFFSET) = compute_frame_size (get_frame_size (), (long *)0); \
665 /* A guess for the V850. */
666 #define PROMOTE_PROTOTYPES 1
668 /* Keep the stack pointer constant throughout the function. */
669 #define ACCUMULATE_OUTGOING_ARGS
671 /* Value is the number of bytes of arguments automatically
672 popped when returning from a subroutine call.
673 FUNDECL is the declaration node of the function (as a tree),
674 FUNTYPE is the data type of the function (as a tree),
675 or for a library call it is an identifier node for the subroutine name.
676 SIZE is the number of bytes of arguments passed on the stack. */
678 #define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) 0
681 /* Define a data type for recording info about an argument list
682 during the scan of that argument list. This data type should
683 hold all necessary information about the function itself
684 and about the args processed so far, enough to enable macros
685 such as FUNCTION_ARG to determine where the next arg should go. */
687 #define CUMULATIVE_ARGS struct cum_arg
688 struct cum_arg { int nbytes; };
690 /* Define where to put the arguments to a function.
691 Value is zero to push the argument on the stack,
692 or a hard register in which to store the argument.
694 MODE is the argument's machine mode.
695 TYPE is the data type of the argument (as a tree).
696 This is null for libcalls where that information may
698 CUM is a variable of type CUMULATIVE_ARGS which gives info about
699 the preceding args and about the function being called.
700 NAMED is nonzero if this argument is a named parameter
701 (otherwise it is an extra parameter matching an ellipsis). */
703 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
704 function_arg (&CUM, MODE, TYPE, NAMED)
706 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
707 function_arg_partial_nregs (&CUM, MODE, TYPE, NAMED)
709 /* Initialize a variable CUM of type CUMULATIVE_ARGS
710 for a call to a function whose data type is FNTYPE.
711 For a library call, FNTYPE is 0. */
713 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT) \
716 /* Update the data in CUM to advance over an argument
717 of mode MODE and data type TYPE.
718 (TYPE is null for libcalls where that information may not be available.) */
720 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
721 ((CUM).nbytes += ((MODE) != BLKmode \
722 ? (GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) & -UNITS_PER_WORD \
723 : (int_size_in_bytes (TYPE) + UNITS_PER_WORD - 1) & -UNITS_PER_WORD))
725 /* When a parameter is passed in a register, stack space is still
727 #define REG_PARM_STACK_SPACE(DECL) (!TARGET_GHS ? 16 : 0)
729 /* Define this if the above stack space is to be considered part of the
730 space allocated by the caller. */
731 #define OUTGOING_REG_PARM_STACK_SPACE
733 extern int current_function_anonymous_args;
734 /* Do any setup necessary for varargs/stdargs functions. */
735 #define SETUP_INCOMING_VARARGS(CUM, MODE, TYPE, PAS, SECOND) \
736 current_function_anonymous_args = (!TARGET_GHS ? 1 : 0);
738 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
739 ((TYPE) && int_size_in_bytes (TYPE) > 8)
741 #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) \
742 ((TYPE) && int_size_in_bytes (TYPE) > 8)
744 /* 1 if N is a possible register number for function argument passing. */
746 #define FUNCTION_ARG_REGNO_P(N) (N >= 6 && N <= 9)
748 /* Define how to find the value returned by a function.
749 VALTYPE is the data type of the value (as a tree).
750 If the precise function being called is known, FUNC is its FUNCTION_DECL;
751 otherwise, FUNC is 0. */
753 #define FUNCTION_VALUE(VALTYPE, FUNC) \
754 gen_rtx (REG, TYPE_MODE (VALTYPE), 10)
756 /* Define how to find the value returned by a library function
757 assuming the value has mode MODE. */
759 #define LIBCALL_VALUE(MODE) \
760 gen_rtx (REG, MODE, 10)
762 /* 1 if N is a possible register number for a function value. */
764 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 10)
766 /* Return values > 8 bytes in length in memory. */
767 #define DEFAULT_PCC_STRUCT_RETURN 0
768 #define RETURN_IN_MEMORY(TYPE) \
769 (int_size_in_bytes (TYPE) > 8 || TYPE_MODE (TYPE) == BLKmode)
771 /* Register in which address to store a structure value
772 is passed to a function. On the V850 it's passed as
773 the first parameter. */
775 #define STRUCT_VALUE 0
777 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
778 the stack pointer does not matter. The value is tested only in
779 functions that have frame pointers.
780 No definition is equivalent to always zero. */
782 #define EXIT_IGNORE_STACK 1
784 /* Output assembler code to FILE to increment profiler label # LABELNO
785 for profiling a function entry. */
787 #define FUNCTION_PROFILER(FILE, LABELNO) ;
789 #define TRAMPOLINE_TEMPLATE(FILE) \
791 fprintf (FILE, "\tjarl .+4,r12\n"); \
792 fprintf (FILE, "\tld.w 12[r12],r5\n"); \
793 fprintf (FILE, "\tld.w 16[r12],r12\n"); \
794 fprintf (FILE, "\tjmp [r12]\n"); \
795 fprintf (FILE, "\tnop\n"); \
796 fprintf (FILE, "\t.long 0\n"); \
797 fprintf (FILE, "\t.long 0\n"); \
800 /* Length in units of the trampoline for entering a nested function. */
802 #define TRAMPOLINE_SIZE 24
804 /* Emit RTL insns to initialize the variable parts of a trampoline.
805 FNADDR is an RTX for the address of the function's pure code.
806 CXT is an RTX for the static chain value for the function. */
808 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
810 emit_move_insn (gen_rtx (MEM, SImode, plus_constant ((TRAMP), 16)), \
812 emit_move_insn (gen_rtx (MEM, SImode, plus_constant ((TRAMP), 20)), \
816 /* Addressing modes, and classification of registers for them. */
819 /* 1 if X is an rtx for a constant that is a valid address. */
821 /* ??? This seems too exclusive. May get better code by accepting more
822 possibilities here, in particular, should accept ZDA_NAME SYMBOL_REFs. */
824 #define CONSTANT_ADDRESS_P(X) \
825 (GET_CODE (X) == CONST_INT \
826 && CONST_OK_FOR_K (INTVAL (X)))
828 /* Maximum number of registers that can appear in a valid memory address. */
830 #define MAX_REGS_PER_ADDRESS 1
832 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
833 and check its validity for a certain class.
834 We have two alternate definitions for each of them.
835 The usual definition accepts all pseudo regs; the other rejects
836 them unless they have been allocated suitable hard regs.
837 The symbol REG_OK_STRICT causes the latter definition to be used.
839 Most source files want to accept pseudo regs in the hope that
840 they will get allocated to the class that the insn wants them to be in.
841 Source files for reload pass need to be strict.
842 After reload, it makes no difference, since pseudo regs have
843 been eliminated by then. */
845 #ifndef REG_OK_STRICT
847 /* Nonzero if X is a hard reg that can be used as an index
848 or if it is a pseudo reg. */
849 #define REG_OK_FOR_INDEX_P(X) 0
850 /* Nonzero if X is a hard reg that can be used as a base reg
851 or if it is a pseudo reg. */
852 #define REG_OK_FOR_BASE_P(X) 1
853 #define REG_OK_FOR_INDEX_P_STRICT(X) 0
854 #define REG_OK_FOR_BASE_P_STRICT(X) REGNO_OK_FOR_BASE_P (REGNO (X))
859 /* Nonzero if X is a hard reg that can be used as an index. */
860 #define REG_OK_FOR_INDEX_P(X) 0
861 /* Nonzero if X is a hard reg that can be used as a base reg. */
862 #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
867 /* A C expression that defines the optional machine-dependent
868 constraint letters that can be used to segregate specific types of
869 operands, usually memory references, for the target machine.
870 Normally this macro will not be defined. If it is required for a
871 particular target machine, it should return 1 if VALUE corresponds
872 to the operand type represented by the constraint letter C. If C
873 is not defined as an extra constraint, the value returned should
874 be 0 regardless of VALUE.
876 For example, on the ROMP, load instructions cannot have their
877 output in r0 if the memory reference contains a symbolic address.
878 Constraint letter `Q' is defined as representing a memory address
879 that does *not* contain a symbolic address. An alternative is
880 specified with a `Q' constraint on the input and `r' on the
881 output. The next alternative specifies `m' on the input and a
882 register class that does not include r0 on the output. */
884 #define EXTRA_CONSTRAINT(OP, C) \
885 ((C) == 'Q' ? ep_memory_operand (OP, GET_MODE (OP)) \
886 : (C) == 'R' ? special_symbolref_operand (OP, VOIDmode) \
887 : (C) == 'S' ? (GET_CODE (OP) == SYMBOL_REF && ! ZDA_NAME_P (XSTR (OP, 0))) \
889 : (C) == 'U' ? ((GET_CODE (OP) == SYMBOL_REF && ZDA_NAME_P (XSTR (OP, 0))) \
890 || (GET_CODE (OP) == CONST \
891 && GET_CODE (XEXP (OP, 0)) == PLUS \
892 && GET_CODE (XEXP (XEXP (OP, 0), 0)) == SYMBOL_REF \
893 && ZDA_NAME_P (XSTR (XEXP (XEXP (OP, 0), 0), 0)))) \
896 /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
897 that is a valid memory address for an instruction.
898 The MODE argument is the machine mode for the MEM expression
899 that wants to use this address.
901 The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS,
902 except for CONSTANT_ADDRESS_P which is actually
903 machine-independent. */
905 /* Accept either REG or SUBREG where a register is valid. */
907 #define RTX_OK_FOR_BASE_P(X) \
908 ((REG_P (X) && REG_OK_FOR_BASE_P (X)) \
909 || (GET_CODE (X) == SUBREG && REG_P (SUBREG_REG (X)) \
910 && REG_OK_FOR_BASE_P (SUBREG_REG (X))))
912 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
914 if (RTX_OK_FOR_BASE_P (X)) goto ADDR; \
915 if (CONSTANT_ADDRESS_P (X) \
916 && (MODE == QImode || INTVAL (X) % 2 == 0) \
917 && (GET_MODE_SIZE (MODE) <= 4 || INTVAL (X) % 4 == 0)) \
919 if (GET_CODE (X) == LO_SUM \
920 && GET_CODE (XEXP (X, 0)) == REG \
921 && REG_OK_FOR_BASE_P (XEXP (X, 0)) \
922 && CONSTANT_P (XEXP (X, 1)) \
923 && (GET_CODE (XEXP (X, 1)) != CONST_INT \
924 || ((MODE == QImode || INTVAL (XEXP (X, 1)) % 2 == 0) \
925 && CONST_OK_FOR_K (INTVAL (XEXP (X, 1))))) \
926 && GET_MODE_SIZE (MODE) <= GET_MODE_SIZE (word_mode)) \
928 if (special_symbolref_operand (X, MODE) \
929 && (GET_MODE_SIZE (MODE) <= GET_MODE_SIZE (word_mode))) \
931 if (GET_CODE (X) == PLUS \
932 && CONSTANT_ADDRESS_P (XEXP (X, 1)) \
933 && (MODE == QImode || INTVAL (XEXP (X, 1)) % 2 == 0) \
934 && RTX_OK_FOR_BASE_P (XEXP (X, 0))) goto ADDR; \
938 /* Try machine-dependent ways of modifying an illegitimate address
939 to be legitimate. If we find one, return the new, valid address.
940 This macro is used in only one place: `memory_address' in explow.c.
942 OLDX is the address as it was before break_out_memory_refs was called.
943 In some cases it is useful to look at this to decide what needs to be done.
945 MODE and WIN are passed so that this macro can use
946 GO_IF_LEGITIMATE_ADDRESS.
948 It is always safe for this macro to do nothing. It exists to recognize
949 opportunities to optimize the output. */
951 #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) {}
953 /* Go to LABEL if ADDR (a legitimate address expression)
954 has an effect that depends on the machine mode it is used for. */
956 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) {}
958 /* Nonzero if the constant value X is a legitimate general operand.
959 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */
961 #define LEGITIMATE_CONSTANT_P(X) \
962 (GET_CODE (X) == CONST_DOUBLE \
963 || !(GET_CODE (X) == CONST \
964 && GET_CODE (XEXP (X, 0)) == PLUS \
965 && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF \
966 && GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT \
967 && ! CONST_OK_FOR_K (INTVAL (XEXP (XEXP (X, 0), 1)))))
969 /* In rare cases, correct code generation requires extra machine
970 dependent processing between the second jump optimization pass and
971 delayed branch scheduling. On those machines, define this macro
972 as a C statement to act on the code starting at INSN. */
974 #define MACHINE_DEPENDENT_REORG(INSN) v850_reorg (INSN)
977 /* Tell final.c how to eliminate redundant test instructions. */
979 /* Here we define machine-dependent flags and fields in cc_status
980 (see `conditions.h'). No extra ones are needed for the vax. */
982 /* Store in cc_status the expressions
983 that the condition codes will describe
984 after execution of an instruction whose pattern is EXP.
985 Do not alter them if the instruction would not alter the cc's. */
987 #define CC_OVERFLOW_UNUSABLE 0x200
988 #define CC_NO_CARRY CC_NO_OVERFLOW
989 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
991 /* A part of a C `switch' statement that describes the relative costs
992 of constant RTL expressions. It must contain `case' labels for
993 expression codes `const_int', `const', `symbol_ref', `label_ref'
994 and `const_double'. Each case must ultimately reach a `return'
995 statement to return the relative cost of the use of that kind of
996 constant value in an expression. The cost may depend on the
997 precise value of the constant, which is available for examination
998 in X, and the rtx code of the expression in which it is contained,
1001 CODE is the expression code--redundant, since it can be obtained
1002 with `GET_CODE (X)'. */
1004 #define CONST_COSTS(RTX,CODE,OUTER_CODE) \
1006 case CONST_DOUBLE: \
1011 int _zxy = const_costs(RTX, CODE); \
1012 return (_zxy) ? COSTS_N_INSNS (_zxy) : 0; \
1015 /* A crude cut at RTX_COSTS for the V850. */
1017 /* Provide the costs of a rtl expression. This is in the body of a
1020 There aren't DImode MOD, DIV or MULT operations, so call them
1021 very expensive. Everything else is pretty much a constant cost. */
1023 #define RTX_COSTS(RTX,CODE,OUTER_CODE) \
1030 /* All addressing modes have the same cost on the V850 series. */
1031 #define ADDRESS_COST(ADDR) 1
1033 /* Nonzero if access to memory by bytes or half words is no faster
1034 than accessing full words. */
1035 #define SLOW_BYTE_ACCESS 1
1037 /* Define this if zero-extension is slow (more than one real instruction). */
1038 #define SLOW_ZERO_EXTEND
1040 /* According expr.c, a value of around 6 should minimize code size, and
1041 for the V850 series, that's our primary concern. */
1042 #define MOVE_RATIO 6
1044 /* Indirect calls are expensive, never turn a direct call
1045 into an indirect call. */
1046 #define NO_FUNCTION_CSE
1048 /* The four different data regions on the v850. */
1057 /* A list of names for sections other than the standard two, which are
1058 `in_text' and `in_data'. You need not define this macro on a
1059 system with no other sections (that GCC needs to use). */
1060 #undef EXTRA_SECTIONS
1061 #define EXTRA_SECTIONS in_tdata, in_sdata, in_zdata, in_const, in_ctors, \
1062 in_dtors, in_rozdata, in_rosdata, in_sbss, in_zbss, in_zcommon, in_scommon
1064 /* One or more functions to be defined in `varasm.c'. These
1065 functions should do jobs analogous to those of `text_section' and
1066 `data_section', for your additional sections. Do not define this
1067 macro if you do not define `EXTRA_SECTIONS'. */
1068 #undef EXTRA_SECTION_FUNCTIONS
1070 /* This could be done a lot more cleanly using ANSI C ... */
1071 #define EXTRA_SECTION_FUNCTIONS \
1072 CONST_SECTION_FUNCTION \
1073 CTORS_SECTION_FUNCTION \
1074 DTORS_SECTION_FUNCTION \
1079 if (in_section != in_sdata) \
1081 fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP); \
1082 in_section = in_sdata; \
1087 rosdata_section () \
1089 if (in_section != in_rosdata) \
1091 fprintf (asm_out_file, "%s\n", ROSDATA_SECTION_ASM_OP); \
1092 in_section = in_sdata; \
1099 if (in_section != in_sbss) \
1101 fprintf (asm_out_file, "%s\n", SBSS_SECTION_ASM_OP); \
1102 in_section = in_sbss; \
1109 if (in_section != in_tdata) \
1111 fprintf (asm_out_file, "%s\n", TDATA_SECTION_ASM_OP); \
1112 in_section = in_tdata; \
1119 if (in_section != in_zdata) \
1121 fprintf (asm_out_file, "%s\n", ZDATA_SECTION_ASM_OP); \
1122 in_section = in_zdata; \
1127 rozdata_section () \
1129 if (in_section != in_rozdata) \
1131 fprintf (asm_out_file, "%s\n", ROZDATA_SECTION_ASM_OP); \
1132 in_section = in_rozdata; \
1139 if (in_section != in_zbss) \
1141 fprintf (asm_out_file, "%s\n", ZBSS_SECTION_ASM_OP); \
1142 in_section = in_zbss; \
1146 #define TEXT_SECTION_ASM_OP "\t.section .text"
1147 #define DATA_SECTION_ASM_OP "\t.section .data"
1148 #define BSS_SECTION_ASM_OP "\t.section .bss"
1149 #define SDATA_SECTION_ASM_OP "\t.section .sdata,\"aw\""
1150 #define SBSS_SECTION_ASM_OP "\t.section .sbss,\"aw\""
1151 #define ZDATA_SECTION_ASM_OP "\t.section .zdata,\"aw\""
1152 #define ZBSS_SECTION_ASM_OP "\t.section .zbss,\"aw\""
1153 #define TDATA_SECTION_ASM_OP "\t.section .tdata,\"aw\""
1154 #define ROSDATA_SECTION_ASM_OP "\t.section .rosdata,\"a\""
1155 #define ROZDATA_SECTION_ASM_OP "\t.section .rozdata,\"a\""
1157 #define SCOMMON_ASM_OP ".scomm"
1158 #define ZCOMMON_ASM_OP ".zcomm"
1159 #define TCOMMON_ASM_OP ".tcomm"
1161 /* A C statement or statements to switch to the appropriate section
1162 for output of EXP. You can assume that EXP is either a `VAR_DECL'
1163 node or a constant of some sort. RELOC indicates whether the
1164 initial value of EXP requires link-time relocations. Select the
1165 section by calling `text_section' or one of the alternatives for
1168 Do not define this macro if you put all read-only variables and
1169 constants in the read-only data section (usually the text section). */
1170 #undef SELECT_SECTION
1171 #define SELECT_SECTION(EXP, RELOC) \
1173 if (TREE_CODE (EXP) == VAR_DECL) \
1176 if (!TREE_READONLY (EXP) \
1177 || TREE_SIDE_EFFECTS (EXP) \
1178 || !DECL_INITIAL (EXP) \
1179 || (DECL_INITIAL (EXP) != error_mark_node \
1180 && !TREE_CONSTANT (DECL_INITIAL (EXP)))) \
1185 switch (v850_get_data_area (EXP)) \
1187 case DATA_AREA_ZDA: \
1189 rozdata_section (); \
1194 case DATA_AREA_TDA: \
1198 case DATA_AREA_SDA: \
1200 rosdata_section (); \
1213 else if (TREE_CODE (EXP) == STRING_CST) \
1215 if (! flag_writable_strings) \
1226 /* A C statement or statements to switch to the appropriate section
1227 for output of RTX in mode MODE. You can assume that RTX is some
1228 kind of constant in RTL. The argument MODE is redundant except in
1229 the case of a `const_int' rtx. Select the section by calling
1230 `text_section' or one of the alternatives for other sections.
1232 Do not define this macro if you put all constants in the read-only
1234 /* #define SELECT_RTX_SECTION(MODE, RTX) */
1236 /* Output at beginning/end of assembler file. */
1237 #undef ASM_FILE_START
1238 #define ASM_FILE_START(FILE) asm_file_start(FILE)
1240 #define ASM_COMMENT_START "#"
1242 /* Output to assembler file text saying following lines
1243 may contain character constants, extra white space, comments, etc. */
1245 #define ASM_APP_ON "#APP\n"
1247 /* Output to assembler file text saying following lines
1248 no longer contain unusual constructs. */
1250 #define ASM_APP_OFF "#NO_APP\n"
1252 /* This is how to output an assembler line defining a `double' constant.
1253 It is .double or .float, depending. */
1255 #define ASM_OUTPUT_DOUBLE(FILE, VALUE) \
1256 do { char dstr[30]; \
1257 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", dstr); \
1258 fprintf (FILE, "\t.double %s\n", dstr); \
1262 /* This is how to output an assembler line defining a `float' constant. */
1263 #define ASM_OUTPUT_FLOAT(FILE, VALUE) \
1264 do { char dstr[30]; \
1265 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", dstr); \
1266 fprintf (FILE, "\t.float %s\n", dstr); \
1269 /* This is how to output an assembler line defining an `int' constant. */
1271 #define ASM_OUTPUT_INT(FILE, VALUE) \
1272 ( fprintf (FILE, "\t.long "), \
1273 output_addr_const (FILE, (VALUE)), \
1274 fprintf (FILE, "\n"))
1276 /* Likewise for `char' and `short' constants. */
1278 #define ASM_OUTPUT_SHORT(FILE, VALUE) \
1279 ( fprintf (FILE, "\t.hword "), \
1280 output_addr_const (FILE, (VALUE)), \
1281 fprintf (FILE, "\n"))
1283 #define ASM_OUTPUT_CHAR(FILE, VALUE) \
1284 ( fprintf (FILE, "\t.byte "), \
1285 output_addr_const (FILE, (VALUE)), \
1286 fprintf (FILE, "\n"))
1288 /* This is how to output an assembler line for a numeric constant byte. */
1289 #define ASM_OUTPUT_BYTE(FILE, VALUE) \
1290 fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
1292 /* Define the parentheses used to group arithmetic operations
1293 in assembler code. */
1295 #define ASM_OPEN_PAREN "("
1296 #define ASM_CLOSE_PAREN ")"
1298 /* This says how to output the assembler to define a global
1299 uninitialized but not common symbol. */
1301 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
1302 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
1304 #undef ASM_OUTPUT_ALIGNED_BSS
1305 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
1306 v850_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
1308 /* This says how to output the assembler to define a global
1309 uninitialized, common symbol. */
1310 #undef ASM_OUTPUT_ALIGNED_COMMON
1311 #undef ASM_OUTPUT_COMMON
1312 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
1313 v850_output_common (FILE, DECL, NAME, SIZE, ALIGN)
1315 /* This says how to output the assembler to define a local
1316 uninitialized symbol. */
1317 #undef ASM_OUTPUT_ALIGNED_LOCAL
1318 #undef ASM_OUTPUT_LOCAL
1319 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
1320 v850_output_local (FILE, DECL, NAME, SIZE, ALIGN)
1322 /* This is how to output the definition of a user-level label named NAME,
1323 such as the label on a static function or variable NAME. */
1325 #define ASM_OUTPUT_LABEL(FILE, NAME) \
1326 do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
1328 /* This is how to output a command to make the user-level label named NAME
1329 defined for reference from other files. */
1331 #define ASM_GLOBALIZE_LABEL(FILE, NAME) \
1332 do { fputs ("\t.global ", FILE); assemble_name (FILE, NAME); fputs ("\n", FILE);} while (0)
1334 /* This is how to output a reference to a user-level label named NAME.
1335 `assemble_name' uses this. */
1337 #undef ASM_OUTPUT_LABELREF
1338 #define ASM_OUTPUT_LABELREF(FILE, NAME) \
1340 const char * real_name; \
1341 STRIP_NAME_ENCODING (real_name, (NAME)); \
1342 fprintf (FILE, "_%s", real_name); \
1345 /* Store in OUTPUT a string (made with alloca) containing
1346 an assembler-name for a local static variable named NAME.
1347 LABELNO is an integer which is different for each call. */
1349 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
1350 ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \
1351 sprintf ((OUTPUT), "%s___%d", (NAME), (LABELNO)))
1353 /* This is how we tell the assembler that two symbols have the same value. */
1355 #define ASM_OUTPUT_DEF(FILE,NAME1,NAME2) \
1356 do { assemble_name(FILE, NAME1); \
1357 fputs(" = ", FILE); \
1358 assemble_name(FILE, NAME2); \
1359 fputc('\n', FILE); } while (0)
1362 /* How to refer to registers in assembler output.
1363 This sequence is indexed by compiler's hard-register-number (see above). */
1365 #define REGISTER_NAMES \
1366 { "r0", "r1", "r2", "sp", "gp", "r5", "r6" , "r7", \
1367 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
1368 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
1369 "r24", "r25", "r26", "r27", "r28", "r29", "ep", "r31", \
1372 #define ADDITIONAL_REGISTER_NAMES \
1382 /* Print an instruction operand X on file FILE.
1383 look in v850.c for details */
1385 #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE)
1387 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
1390 /* Print a memory operand whose address is X, on file FILE.
1391 This uses a function in output-vax.c. */
1393 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR)
1395 #define ASM_OUTPUT_REG_PUSH(FILE,REGNO)
1396 #define ASM_OUTPUT_REG_POP(FILE,REGNO)
1398 /* This is how to output an element of a case-vector that is absolute. */
1400 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
1401 asm_fprintf (FILE, "\t%s .L%d\n", \
1402 (TARGET_BIG_SWITCH ? ".long" : ".short"), VALUE)
1404 /* This is how to output an element of a case-vector that is relative. */
1406 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
1407 fprintf (FILE, "\t%s .L%d-.L%d\n", \
1408 (TARGET_BIG_SWITCH ? ".long" : ".short"), \
1411 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
1413 fprintf (FILE, "\t.align %d\n", (LOG))
1415 /* We don't have to worry about dbx compatibility for the v850. */
1416 #define DEFAULT_GDB_EXTENSIONS 1
1418 /* Use stabs debugging info by default. */
1419 #undef PREFERRED_DEBUGGING_TYPE
1420 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
1422 #define DBX_REGISTER_NUMBER(REGNO) REGNO
1424 /* Define to use software floating point emulator for REAL_ARITHMETIC and
1425 decimal <-> binary conversion. */
1426 #define REAL_ARITHMETIC
1428 /* Specify the machine mode that this machine uses
1429 for the index in the tablejump instruction. */
1430 #define CASE_VECTOR_MODE (TARGET_BIG_SWITCH ? SImode : HImode)
1432 /* Define this if the case instruction drops through after the table
1433 when the index is out of range. Don't define it if the case insn
1434 jumps to the default label instead. */
1435 /* #define CASE_DROPS_THROUGH */
1437 /* Define as C expression which evaluates to nonzero if the tablejump
1438 instruction expects the table to contain offsets from the address of the
1440 Do not define this if the table should contain absolute addresses. */
1441 #define CASE_VECTOR_PC_RELATIVE 1
1443 /* The switch instruction requires that the jump table immediately follow
1445 #define JUMP_TABLES_IN_TEXT_SECTION 1
1447 /* svr4.h defines this assuming that 4 byte alignment is required. */
1448 #undef ASM_OUTPUT_BEFORE_CASE_LABEL
1449 #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \
1450 ASM_OUTPUT_ALIGN ((FILE), (TARGET_BIG_SWITCH ? 2 : 1));
1452 #define WORD_REGISTER_OPERATIONS
1454 /* Byte and short loads sign extend the value to a word. */
1455 #define LOAD_EXTEND_OP(MODE) SIGN_EXTEND
1457 /* Specify the tree operation to be used to convert reals to integers. */
1458 #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
1460 /* This flag, if defined, says the same insns that convert to a signed fixnum
1461 also convert validly to an unsigned one. */
1462 #define FIXUNS_TRUNC_LIKE_FIX_TRUNC
1464 /* This is the kind of divide that is easiest to do in the general case. */
1465 #define EASY_DIV_EXPR TRUNC_DIV_EXPR
1467 /* Max number of bytes we can move from memory to memory
1468 in one reasonably fast instruction. */
1471 /* Define if shifts truncate the shift count
1472 which implies one can omit a sign-extension or zero-extension
1473 of a shift count. */
1474 #define SHIFT_COUNT_TRUNCATED 1
1476 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
1477 is done just by pretending it is already truncated. */
1478 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1480 #define STORE_FLAG_VALUE 1
1482 /* Specify the machine mode that pointers have.
1483 After generation of rtl, the compiler makes no further distinction
1484 between pointers and any other objects of this machine mode. */
1485 #define Pmode SImode
1487 /* A function address in a call instruction
1488 is a byte address (for indexing purposes)
1489 so give the MEM rtx a byte's mode. */
1490 #define FUNCTION_MODE QImode
1492 /* A C expression whose value is nonzero if IDENTIFIER with arguments ARGS
1493 is a valid machine specific attribute for DECL.
1494 The attributes in ATTRIBUTES have previously been assigned to DECL. */
1495 #define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, IDENTIFIER, ARGS) \
1496 v850_valid_machine_decl_attribute (DECL, IDENTIFIER, ARGS)
1498 /* A C statement that assigns default attributes to a newly created DECL. */
1499 #define SET_DEFAULT_DECL_ATTRIBUTES(decl, attr) \
1500 v850_set_default_decl_attr (decl)
1502 /* Tell compiler we want to support GHS pragmas */
1503 #define HANDLE_PRAGMA(get, unget, name) v850_handle_pragma (get, unget, name)
1505 enum v850_pragma_state
1508 V850_PS_SHOULD_BE_DONE,
1510 V850_PS_MAYBE_SECTION_NAME,
1511 V850_PS_EXPECTING_EQUALS,
1512 V850_PS_EXPECTING_SECTION_ALIAS,
1516 enum v850_pragma_type
1521 V850_PT_START_SECTION,
1525 /* enum GHS_SECTION_KIND is an enumeration of the kinds of sections that
1526 can appear in the "ghs section" pragma. These names are used to index
1527 into the GHS_default_section_names[] and GHS_current_section_names[]
1528 that are defined in v850.c, and so the ordering of each must remain
1531 These arrays give the default and current names for each kind of
1532 section defined by the GHS pragmas. The current names can be changed
1533 by the "ghs section" pragma. If the current names are null, use
1534 the default names. Note that the two arrays have different types.
1536 For the *normal* section kinds (like .data, .text, etc.) we do not
1537 want to explicitly force the name of these sections, but would rather
1538 let the linker (or at least the back end) choose the name of the
1539 section, UNLESS the user has force a specific name for these section
1540 kinds. To accomplish this set the name in ghs_default_section_names
1543 enum GHS_section_kind
1545 GHS_SECTION_KIND_DEFAULT,
1547 GHS_SECTION_KIND_TEXT,
1548 GHS_SECTION_KIND_DATA,
1549 GHS_SECTION_KIND_RODATA,
1550 GHS_SECTION_KIND_BSS,
1551 GHS_SECTION_KIND_SDATA,
1552 GHS_SECTION_KIND_ROSDATA,
1553 GHS_SECTION_KIND_TDATA,
1554 GHS_SECTION_KIND_ZDATA,
1555 GHS_SECTION_KIND_ROZDATA,
1557 COUNT_OF_GHS_SECTION_KINDS /* must be last */
1560 /* The assembler op to start the file. */
1562 #define FILE_ASM_OP "\t.file\n"
1564 /* Enable the register move pass to improve code. */
1565 #define ENABLE_REGMOVE_PASS
1568 /* Implement ZDA, TDA, and SDA */
1570 #define EP_REGNUM 30 /* ep register number */
1572 #define ENCODE_SECTION_INFO(DECL) \
1574 if ((TREE_STATIC (DECL) || DECL_EXTERNAL (DECL)) \
1575 && TREE_CODE (DECL) == VAR_DECL) \
1576 v850_encode_data_area (DECL); \
1579 #define ZDA_NAME_FLAG_CHAR '@'
1580 #define TDA_NAME_FLAG_CHAR '%'
1581 #define SDA_NAME_FLAG_CHAR '&'
1583 #define ZDA_NAME_P(NAME) (*(NAME) == ZDA_NAME_FLAG_CHAR)
1584 #define TDA_NAME_P(NAME) (*(NAME) == TDA_NAME_FLAG_CHAR)
1585 #define SDA_NAME_P(NAME) (*(NAME) == SDA_NAME_FLAG_CHAR)
1587 #define ENCODED_NAME_P(SYMBOL_NAME) \
1588 (ZDA_NAME_P (SYMBOL_NAME) \
1589 || TDA_NAME_P (SYMBOL_NAME) \
1590 || SDA_NAME_P (SYMBOL_NAME))
1592 #define STRIP_NAME_ENCODING(VAR,SYMBOL_NAME) \
1593 (VAR) = (SYMBOL_NAME) + (ENCODED_NAME_P (SYMBOL_NAME) || *(SYMBOL_NAME) == '*')
1595 /* Define this if you have defined special-purpose predicates in the
1596 file `MACHINE.c'. This macro is called within an initializer of an
1597 array of structures. The first field in the structure is the name
1598 of a predicate and the second field is an array of rtl codes. For
1599 each predicate, list all rtl codes that can be in expressions
1600 matched by the predicate. The list should have a trailing comma. */
1602 #define PREDICATE_CODES \
1603 { "ep_memory_operand", { MEM }}, \
1604 { "reg_or_0_operand", { REG, SUBREG, CONST_INT, CONST_DOUBLE }}, \
1605 { "reg_or_int5_operand", { REG, SUBREG, CONST_INT }}, \
1606 { "call_address_operand", { REG, SYMBOL_REF }}, \
1607 { "movsi_source_operand", { LABEL_REF, SYMBOL_REF, CONST_INT, \
1608 CONST_DOUBLE, CONST, HIGH, MEM, \
1610 { "special_symbolref_operand", { SYMBOL_REF }}, \
1611 { "power_of_two_operand", { CONST_INT }}, \
1612 { "pattern_is_ok_for_prologue", { PARALLEL }}, \
1613 { "pattern_is_ok_for_epilogue", { PARALLEL }}, \
1614 { "register_is_ok_for_epilogue",{ REG }}, \
1615 { "not_power_of_two_operand", { CONST_INT }},
1617 /* Note, due to dependency and search path conflicts, prototypes
1618 involving the FILE, rtx or tree types cannot be included here.
1619 They are included at the start of v850.c */
1621 extern void asm_file_start ();
1622 extern void print_operand ();
1623 extern void print_operand_address ();
1624 extern int function_arg_partial_nregs ();
1625 extern int const_costs ();
1626 extern char * output_move_double ();
1627 extern char * output_move_single ();
1628 extern int ep_memory_operand ();
1629 extern int reg_or_0_operand ();
1630 extern int reg_or_int5_operand ();
1631 extern int call_address_operand ();
1632 extern int movsi_source_operand ();
1633 extern int power_of_two_operand ();
1634 extern int not_power_of_two_operand ();
1635 extern int special_symbolref_operand ();
1636 extern void v850_reorg ();
1637 extern void notice_update_cc ();
1638 extern int v850_valid_machine_decl_attribute ();
1639 extern int v850_interrupt_function_p ();
1640 extern int pattern_is_ok_for_prologue ();
1641 extern int pattern_is_ok_for_epilogue ();
1642 extern int register_is_ok_for_epilogue ();
1643 extern char * construct_save_jarl ();
1644 extern char * construct_restore_jr ();
1646 extern void override_options PROTO ((void));
1647 extern int compute_register_save_size PROTO ((long *));
1648 extern int compute_frame_size PROTO ((int, long *));
1649 extern void expand_prologue PROTO ((void));
1650 extern void expand_epilogue PROTO ((void));
1652 extern void v850_output_aligned_bss ();
1653 extern void v850_output_common ();
1654 extern void v850_output_local ();
1655 extern void sdata_section PROTO ((void));
1656 extern void rosdata_section PROTO ((void));
1657 extern void sbss_section PROTO ((void));
1658 extern void tdata_section PROTO ((void));
1659 extern void zdata_section PROTO ((void));
1660 extern void rozdata_section PROTO ((void));
1661 extern void zbss_section PROTO ((void));
1662 extern int v850_handle_pragma PROTO ((int (*)(void), void (*)(int), char *));
1663 extern void v850_encode_data_area ();
1664 extern void v850_set_default_decl_attr ();
1665 extern v850_data_area v850_get_data_area ();