]>
gcc.gnu.org Git - gcc.git/blob - gcc/config/fr30/fr30.h
3 /* Definitions of FR30 target.
4 Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
5 Contributed by Cygnus Solutions.
7 This file is part of GNU CC.
9 GNU CC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 GNU CC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GNU CC; see the file COPYING. If not, write to
21 the Free Software Foundation, 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
25 /*{{{ Driver configuration. */
27 /* Defined in svr4.h. */
28 #undef SWITCH_TAKES_ARG
30 /* Defined in svr4.h. */
31 #undef WORD_SWITCH_TAKES_ARG
34 /*{{{ Run-time target specifications. */
37 #define ASM_SPEC "%{v}"
39 /* Define this to be a string constant containing `-D' options to define the
40 predefined macros that identify this machine and system. These macros will
41 be predefined unless the `-ansi' option is specified. */
43 #define TARGET_CPU_CPP_BUILTINS() \
46 builtin_define_std ("fr30"); \
47 builtin_assert ("machine=fr30"); \
51 /* Use LDI:20 instead of LDI:32 to load addresses. */
52 #define TARGET_SMALL_MODEL_MASK (1 << 0)
53 #define TARGET_SMALL_MODEL (target_flags & TARGET_SMALL_MODEL_MASK)
55 #define TARGET_DEFAULT 0
57 /* This declaration should be present. */
58 extern int target_flags
;
60 #define TARGET_SWITCHES \
62 { "small-model", TARGET_SMALL_MODEL_MASK, \
63 N_("Assume small address space") }, \
64 { "no-small-model", - TARGET_SMALL_MODEL_MASK, "" }, \
65 { "no-lsim", 0, "" }, \
66 { "", TARGET_DEFAULT, "" } \
69 #define TARGET_VERSION fprintf (stderr, " (fr30)");
71 #define CAN_DEBUG_WITHOUT_FP
74 #define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s"
76 /* Include the OS stub library, so that the code can be simulated.
77 This is not the right way to do this. Ideally this kind of thing
78 should be done in the linker script - but I have not worked out how
79 to specify the location of a linker script in a gcc command line yet... */
81 #define ENDFILE_SPEC "%{!mno-lsim:-lsim} crtend.o%s crtn.o%s"
84 /*{{{ Storage Layout. */
86 #define BITS_BIG_ENDIAN 1
88 #define BYTES_BIG_ENDIAN 1
90 #define WORDS_BIG_ENDIAN 1
92 #define UNITS_PER_WORD 4
94 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
97 if (GET_MODE_CLASS (MODE) == MODE_INT \
98 && GET_MODE_SIZE (MODE) < 4) \
103 #define PARM_BOUNDARY 32
105 #define STACK_BOUNDARY 32
107 #define FUNCTION_BOUNDARY 32
109 #define BIGGEST_ALIGNMENT 32
111 #define DATA_ALIGNMENT(TYPE, ALIGN) \
112 (TREE_CODE (TYPE) == ARRAY_TYPE \
113 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
114 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
116 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
117 (TREE_CODE (EXP) == STRING_CST \
118 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
120 #define STRICT_ALIGNMENT 1
122 /* Defined in svr4.h. */
123 #define PCC_BITFIELD_TYPE_MATTERS 1
125 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
128 /*{{{ Layout of Source Language Data Types. */
130 #define SHORT_TYPE_SIZE 16
131 #define INT_TYPE_SIZE 32
132 #define LONG_TYPE_SIZE 32
133 #define LONG_LONG_TYPE_SIZE 64
134 #define FLOAT_TYPE_SIZE 32
135 #define DOUBLE_TYPE_SIZE 64
136 #define LONG_DOUBLE_TYPE_SIZE 64
138 #define DEFAULT_SIGNED_CHAR 1
141 /*{{{ REGISTER BASICS. */
143 /* Number of hardware registers known to the compiler. They receive numbers 0
144 through `FIRST_PSEUDO_REGISTER-1'; thus, the first pseudo register's number
145 really is assigned the number `FIRST_PSEUDO_REGISTER'. */
146 #define FIRST_PSEUDO_REGISTER 21
148 /* Fixed register assignments: */
150 /* Here we do a BAD THING - reserve a register for use by the machine
151 description file. There are too many places in compiler where it
152 assumes that it can issue a branch or jump instruction without
153 providing a scratch register for it, and reload just cannot cope, so
154 we keep a register back for these situations. */
155 #define COMPILER_SCRATCH_REGISTER 0
157 /* The register that contains the result of a function call. */
158 #define RETURN_VALUE_REGNUM 4
160 /* The first register that can contain the arguments to a function. */
161 #define FIRST_ARG_REGNUM 4
163 /* A call-used register that can be used during the function prologue. */
164 #define PROLOGUE_TMP_REGNUM COMPILER_SCRATCH_REGISTER
166 /* Register numbers used for passing a function's static chain pointer. If
167 register windows are used, the register number as seen by the called
168 function is `STATIC_CHAIN_INCOMING_REGNUM', while the register number as
169 seen by the calling function is `STATIC_CHAIN_REGNUM'. If these registers
170 are the same, `STATIC_CHAIN_INCOMING_REGNUM' need not be defined.
172 The static chain register need not be a fixed register.
174 If the static chain is passed in memory, these macros should not be defined;
175 instead, the next two macros should be defined. */
176 #define STATIC_CHAIN_REGNUM 12
177 /* #define STATIC_CHAIN_INCOMING_REGNUM */
179 /* An FR30 specific hardware register. */
180 #define ACCUMULATOR_REGNUM 13
182 /* The register number of the frame pointer register, which is used to access
183 automatic variables in the stack frame. On some machines, the hardware
184 determines which register this is. On other machines, you can choose any
185 register you wish for this purpose. */
186 #define FRAME_POINTER_REGNUM 14
188 /* The register number of the stack pointer register, which must also be a
189 fixed register according to `FIXED_REGISTERS'. On most machines, the
190 hardware determines which register this is. */
191 #define STACK_POINTER_REGNUM 15
193 /* The following a fake hard registers that describe some of the dedicated
194 registers on the FR30. */
195 #define CONDITION_CODE_REGNUM 16
196 #define RETURN_POINTER_REGNUM 17
197 #define MD_HIGH_REGNUM 18
198 #define MD_LOW_REGNUM 19
200 /* An initializer that says which registers are used for fixed purposes all
201 throughout the compiled code and are therefore not available for general
202 allocation. These would include the stack pointer, the frame pointer
203 (except on machines where that can be used as a general register when no
204 frame pointer is needed), the program counter on machines where that is
205 considered one of the addressable registers, and any other numbered register
208 This information is expressed as a sequence of numbers, separated by commas
209 and surrounded by braces. The Nth number is 1 if register N is fixed, 0
212 The table initialized from this macro, and the table initialized by the
213 following one, may be overridden at run time either automatically, by the
214 actions of the macro `CONDITIONAL_REGISTER_USAGE', or by the user with the
215 command options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'. */
216 #define FIXED_REGISTERS \
217 { 1, 0, 0, 0, 0, 0, 0, 0, /* 0 - 7 */ \
218 0, 0, 0, 0, 0, 0, 0, 1, /* 8 - 15 */ \
219 1, 1, 1, 1, 1 } /* 16 - 20 */
221 /* XXX - MDL and MDH set as fixed for now - this is until I can get the
222 mul patterns working. */
224 /* Like `FIXED_REGISTERS' but has 1 for each register that is clobbered (in
225 general) by function calls as well as for fixed registers. This macro
226 therefore identifies the registers that are not available for general
227 allocation of values that must live across function calls.
229 If a register has 0 in `CALL_USED_REGISTERS', the compiler automatically
230 saves it on function entry and restores it on function exit, if the register
231 is used within the function. */
232 #define CALL_USED_REGISTERS \
233 { 1, 1, 1, 1, 1, 1, 1, 1, /* 0 - 7 */ \
234 0, 0, 0, 0, 1, 1, 0, 1, /* 8 - 15 */ \
235 1, 1, 1, 1, 1 } /* 16 - 20 */
237 /* A C initializer containing the assembler's names for the machine registers,
238 each one as a C string constant. This is what translates register numbers
239 in the compiler into assembler language. */
240 #define REGISTER_NAMES \
241 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
242 "r8", "r9", "r10", "r11", "r12", "ac", "fp", "sp", \
243 "cc", "rp", "mdh", "mdl", "ap" \
246 /* If defined, a C initializer for an array of structures containing a name and
247 a register number. This macro defines additional names for hard registers,
248 thus allowing the `asm' option in declarations to refer to registers using
250 #define ADDITIONAL_REGISTER_NAMES \
252 {"r13", 13}, {"r14", 14}, {"r15", 15}, {"usp", 15}, {"ps", 16}\
256 /*{{{ How Values Fit in Registers. */
258 /* A C expression for the number of consecutive hard registers, starting at
259 register number REGNO, required to hold a value of mode MODE. */
261 #define HARD_REGNO_NREGS(REGNO, MODE) \
262 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
264 /* A C expression that is nonzero if it is permissible to store a value of mode
265 MODE in hard register number REGNO (or in several registers starting with
268 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
270 /* A C expression that is nonzero if it is desirable to choose register
271 allocation so as to avoid move instructions between a value of mode MODE1
272 and a value of mode MODE2.
274 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, MODE2)' are
275 ever different for any R, then `MODES_TIEABLE_P (MODE1, MODE2)' must be
277 #define MODES_TIEABLE_P(MODE1, MODE2) 1
280 /*{{{ Register Classes. */
282 /* An enumeral type that must be defined with all the register class names as
283 enumeral values. `NO_REGS' must be first. `ALL_REGS' must be the last
284 register class, followed by one more enumeral value, `LIM_REG_CLASSES',
285 which is not a register class but rather tells how many classes there are.
287 Each register class has a number, which is the value of casting the class
288 name to type `int'. The number serves as an index in many of the tables
293 MULTIPLY_32_REG
, /* the MDL register as used by the MULH, MULUH insns */
294 MULTIPLY_64_REG
, /* the MDH,MDL register pair as used by MUL and MULU */
295 LOW_REGS
, /* registers 0 through 7 */
296 HIGH_REGS
, /* registers 8 through 15 */
297 REAL_REGS
, /* ie all the general hardware registers on the FR30 */
302 #define GENERAL_REGS REAL_REGS
303 #define N_REG_CLASSES ((int) LIM_REG_CLASSES)
305 /* An initializer containing the names of the register classes as C string
306 constants. These names are used in writing some of the debugging dumps. */
307 #define REG_CLASS_NAMES \
318 /* An initializer containing the contents of the register classes, as integers
319 which are bit masks. The Nth integer specifies the contents of class N.
320 The way the integer MASK is interpreted is that register R is in the class
321 if `MASK & (1 << R)' is 1.
323 When the machine has more than 32 registers, an integer does not suffice.
324 Then the integers are replaced by sub-initializers, braced groupings
325 containing several integers. Each sub-initializer must be suitable as an
326 initializer for the type `HARD_REG_SET' which is defined in
328 #define REG_CLASS_CONTENTS \
331 { 1 << MD_LOW_REGNUM }, \
332 { (1 << MD_LOW_REGNUM) | (1 << MD_HIGH_REGNUM) }, \
334 { ((1 << 8) - 1) << 8 }, \
335 { (1 << CONDITION_CODE_REGNUM) - 1 }, \
336 { (1 << FIRST_PSEUDO_REGISTER) - 1 } \
339 /* A C expression whose value is a register class containing hard register
340 REGNO. In general there is more than one such class; choose a class which
341 is "minimal", meaning that no smaller class also contains the register. */
342 #define REGNO_REG_CLASS(REGNO) \
343 ( (REGNO) < 8 ? LOW_REGS \
344 : (REGNO) < CONDITION_CODE_REGNUM ? HIGH_REGS \
345 : (REGNO) == MD_LOW_REGNUM ? MULTIPLY_32_REG \
346 : (REGNO) == MD_HIGH_REGNUM ? MULTIPLY_64_REG \
349 /* A macro whose definition is the name of the class to which a valid base
350 register must belong. A base register is one used in an address which is
351 the register value plus a displacement. */
352 #define BASE_REG_CLASS REAL_REGS
354 /* A macro whose definition is the name of the class to which a valid index
355 register must belong. An index register is one used in an address where its
356 value is either multiplied by a scale factor or added to another register
357 (as well as added to a displacement). */
358 #define INDEX_REG_CLASS REAL_REGS
360 /* A C expression which defines the machine-dependent operand constraint
361 letters for register classes. If CHAR is such a letter, the value should be
362 the register class corresponding to it. Otherwise, the value should be
363 `NO_REGS'. The register letter `r', corresponding to class `GENERAL_REGS',
364 will not be passed to this macro; you do not need to handle it.
366 The following letters are unavailable, due to being used as
371 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P'
372 'Q', 'R', 'S', 'T', 'U'
374 'g', 'i', 'm', 'n', 'o', 'p', 'r', 's' */
376 #define REG_CLASS_FROM_LETTER(CHAR) \
377 ( (CHAR) == 'd' ? MULTIPLY_64_REG \
378 : (CHAR) == 'e' ? MULTIPLY_32_REG \
379 : (CHAR) == 'h' ? HIGH_REGS \
380 : (CHAR) == 'l' ? LOW_REGS \
381 : (CHAR) == 'a' ? ALL_REGS \
384 /* A C expression which is nonzero if register number NUM is suitable for use
385 as a base register in operand addresses. It may be either a suitable hard
386 register or a pseudo register that has been allocated such a hard register. */
387 #define REGNO_OK_FOR_BASE_P(NUM) 1
389 /* A C expression which is nonzero if register number NUM is suitable for use
390 as an index register in operand addresses. It may be either a suitable hard
391 register or a pseudo register that has been allocated such a hard register.
393 The difference between an index register and a base register is that the
394 index register may be scaled. If an address involves the sum of two
395 registers, neither one of them scaled, then either one may be labeled the
396 "base" and the other the "index"; but whichever labeling is used must fit
397 the machine's constraints of which registers may serve in each capacity.
398 The compiler will try both labelings, looking for one that is valid, and
399 will reload one or both registers only if neither labeling works. */
400 #define REGNO_OK_FOR_INDEX_P(NUM) 1
402 /* A C expression that places additional restrictions on the register class to
403 use when it is necessary to copy value X into a register in class CLASS.
404 The value is a register class; perhaps CLASS, or perhaps another, smaller
405 class. On many machines, the following definition is safe:
407 #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS
409 Sometimes returning a more restrictive class makes better code. For
410 example, on the 68000, when X is an integer constant that is in range for a
411 `moveq' instruction, the value of this macro is always `DATA_REGS' as long
412 as CLASS includes the data registers. Requiring a data register guarantees
413 that a `moveq' will be used.
415 If X is a `const_double', by returning `NO_REGS' you can force X into a
416 memory constant. This is useful on certain machines where immediate
417 floating values cannot be loaded into certain kinds of registers. */
418 #define PREFERRED_RELOAD_CLASS(X, CLASS) CLASS
420 /* A C expression for the maximum number of consecutive registers of
421 class CLASS needed to hold a value of mode MODE.
423 This is closely related to the macro `HARD_REGNO_NREGS'. In fact, the value
424 of the macro `CLASS_MAX_NREGS (CLASS, MODE)' should be the maximum value of
425 `HARD_REGNO_NREGS (REGNO, MODE)' for all REGNO values in the class CLASS.
427 This macro helps control the handling of multiple-word values in
429 #define CLASS_MAX_NREGS(CLASS, MODE) HARD_REGNO_NREGS (0, MODE)
434 /* A C expression that defines the machine-dependent operand constraint letters
435 (`I', `J', `K', .. 'P') that specify particular ranges of integer values.
436 If C is one of those letters, the expression should check that VALUE, an
437 integer, is in the appropriate range and return 1 if so, 0 otherwise. If C
438 is not one of those letters, the value should be 0 regardless of VALUE. */
439 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
440 ( (C) == 'I' ? IN_RANGE (VALUE, 0, 15) \
441 : (C) == 'J' ? IN_RANGE (VALUE, -16, -1) \
442 : (C) == 'K' ? IN_RANGE (VALUE, 16, 31) \
443 : (C) == 'L' ? IN_RANGE (VALUE, 0, (1 << 8) - 1) \
444 : (C) == 'M' ? IN_RANGE (VALUE, 0, (1 << 20) - 1) \
445 : (C) == 'P' ? IN_RANGE (VALUE, -(1 << 8), (1 << 8) - 1) \
448 /* A C expression that defines the machine-dependent operand constraint letters
449 (`G', `H') that specify particular ranges of `const_double' values.
451 If C is one of those letters, the expression should check that VALUE, an RTX
452 of code `const_double', is in the appropriate range and return 1 if so, 0
453 otherwise. If C is not one of those letters, the value should be 0
456 `const_double' is used for all floating-point constants and for `DImode'
457 fixed-point constants. A given letter can accept either or both kinds of
458 values. It can use `GET_MODE' to distinguish between these kinds. */
459 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) 0
461 /* A C expression that defines the optional machine-dependent constraint
462 letters (`Q', `R', `S', `T', `U') that can be used to segregate specific
463 types of operands, usually memory references, for the target machine.
464 Normally this macro will not be defined. If it is required for a particular
465 target machine, it should return 1 if VALUE corresponds to the operand type
466 represented by the constraint letter C. If C is not defined as an extra
467 constraint, the value returned should be 0 regardless of VALUE.
469 For example, on the ROMP, load instructions cannot have their output in r0
470 if the memory reference contains a symbolic address. Constraint letter `Q'
471 is defined as representing a memory address that does *not* contain a
472 symbolic address. An alternative is specified with a `Q' constraint on the
473 input and `r' on the output. The next alternative specifies `m' on the
474 input and a register class that does not include r0 on the output. */
475 #define EXTRA_CONSTRAINT(VALUE, C) \
476 ((C) == 'Q' ? (GET_CODE (VALUE) == MEM && GET_CODE (XEXP (VALUE, 0)) == SYMBOL_REF) : 0)
479 /*{{{ Basic Stack Layout. */
481 /* Define this macro if pushing a word onto the stack moves the stack pointer
482 to a smaller address. */
483 #define STACK_GROWS_DOWNWARD 1
485 /* Define this macro if the addresses of local variable slots are at negative
486 offsets from the frame pointer. */
487 #define FRAME_GROWS_DOWNWARD 1
489 /* Offset from the frame pointer to the first local variable slot to be
492 If `FRAME_GROWS_DOWNWARD', find the next slot's offset by subtracting the
493 first slot's length from `STARTING_FRAME_OFFSET'. Otherwise, it is found by
494 adding the length of the first slot to the value `STARTING_FRAME_OFFSET'. */
495 /* #define STARTING_FRAME_OFFSET -4 */
496 #define STARTING_FRAME_OFFSET 0
498 /* Offset from the stack pointer register to the first location at which
499 outgoing arguments are placed. If not specified, the default value of zero
500 is used. This is the proper value for most machines.
502 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
503 location at which outgoing arguments are placed. */
504 #define STACK_POINTER_OFFSET 0
506 /* Offset from the argument pointer register to the first argument's address.
507 On some machines it may depend on the data type of the function.
509 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
510 argument's address. */
511 #define FIRST_PARM_OFFSET(FUNDECL) 0
513 /* A C expression whose value is RTL representing the location of the incoming
514 return address at the beginning of any function, before the prologue. This
515 RTL is either a `REG', indicating that the return value is saved in `REG',
516 or a `MEM' representing a location in the stack.
518 You only need to define this macro if you want to support call frame
519 debugging information like that provided by DWARF 2. */
520 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (SImode, RETURN_POINTER_REGNUM)
523 /*{{{ Register That Address the Stack Frame. */
525 /* The register number of the arg pointer register, which is used to access the
526 function's argument list. On some machines, this is the same as the frame
527 pointer register. On some machines, the hardware determines which register
528 this is. On other machines, you can choose any register you wish for this
529 purpose. If this is not the same register as the frame pointer register,
530 then you must mark it as a fixed register according to `FIXED_REGISTERS', or
531 arrange to be able to eliminate it. */
532 #define ARG_POINTER_REGNUM 20
535 /*{{{ Eliminating the Frame Pointer and the Arg Pointer. */
537 /* A C expression which is nonzero if a function must have and use a frame
538 pointer. This expression is evaluated in the reload pass. If its value is
539 nonzero the function will have a frame pointer.
541 The expression can in principle examine the current function and decide
542 according to the facts, but on most machines the constant 0 or the constant
543 1 suffices. Use 0 when the machine allows code to be generated with no
544 frame pointer, and doing so saves some time or space. Use 1 when there is
545 no possible advantage to avoiding a frame pointer.
547 In certain cases, the compiler does not know how to produce valid code
548 without a frame pointer. The compiler recognizes those cases and
549 automatically gives the function a frame pointer regardless of what
550 `FRAME_POINTER_REQUIRED' says. You don't need to worry about them.
552 In a function that does not require a frame pointer, the frame pointer
553 register can be allocated for ordinary usage, unless you mark it as a fixed
554 register. See `FIXED_REGISTERS' for more information. */
555 /* #define FRAME_POINTER_REQUIRED 0 */
556 #define FRAME_POINTER_REQUIRED \
557 (flag_omit_frame_pointer == 0 || current_function_pretend_args_size > 0)
559 /* If defined, this macro specifies a table of register pairs used to eliminate
560 unneeded registers that point into the stack frame. If it is not defined,
561 the only elimination attempted by the compiler is to replace references to
562 the frame pointer with references to the stack pointer.
564 The definition of this macro is a list of structure initializations, each of
565 which specifies an original and replacement register.
567 On some machines, the position of the argument pointer is not known until
568 the compilation is completed. In such a case, a separate hard register must
569 be used for the argument pointer. This register can be eliminated by
570 replacing it with either the frame pointer or the argument pointer,
571 depending on whether or not the frame pointer has been eliminated.
573 In this case, you might specify:
574 #define ELIMINABLE_REGS \
575 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
576 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
577 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
579 Note that the elimination of the argument pointer with the stack pointer is
580 specified first since that is the preferred elimination. */
582 #define ELIMINABLE_REGS \
584 {ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
585 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
586 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM} \
589 /* A C expression that returns non-zero if the compiler is allowed to try to
590 replace register number FROM with register number TO. This macro
591 need only be defined if `ELIMINABLE_REGS' is defined, and will usually be
592 the constant 1, since most of the cases preventing register elimination are
593 things that the compiler already knows about. */
595 #define CAN_ELIMINATE(FROM, TO) \
596 ((TO) == FRAME_POINTER_REGNUM || ! frame_pointer_needed)
598 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It specifies the
599 initial difference between the specified pair of registers. This macro must
600 be defined if `ELIMINABLE_REGS' is defined. */
601 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
602 (OFFSET) = fr30_compute_frame_size (FROM, TO)
605 /*{{{ Passing Function Arguments on the Stack. */
607 /* Define this macro if an argument declared in a prototype as an integral type
608 smaller than `int' should actually be passed as an `int'. In addition to
609 avoiding errors in certain cases of mismatch, it also makes for better code
610 on certain machines. */
611 #define PROMOTE_PROTOTYPES 1
613 /* If defined, the maximum amount of space required for outgoing arguments will
614 be computed and placed into the variable
615 `current_function_outgoing_args_size'. No space will be pushed onto the
616 stack for each call; instead, the function prologue should increase the
617 stack frame size by this amount.
619 Defining both `PUSH_ROUNDING' and `ACCUMULATE_OUTGOING_ARGS' is not
621 #define ACCUMULATE_OUTGOING_ARGS 1
623 /* A C expression that should indicate the number of bytes of its own arguments
624 that a function pops on returning, or 0 if the function pops no arguments
625 and the caller must therefore pop them all after the function returns.
627 FUNDECL is a C variable whose value is a tree node that describes the
628 function in question. Normally it is a node of type `FUNCTION_DECL' that
629 describes the declaration of the function. From this it is possible to
630 obtain the DECL_ATTRIBUTES of the function.
632 FUNTYPE is a C variable whose value is a tree node that describes the
633 function in question. Normally it is a node of type `FUNCTION_TYPE' that
634 describes the data type of the function. From this it is possible to obtain
635 the data types of the value and arguments (if known).
637 When a call to a library function is being considered, FUNTYPE will contain
638 an identifier node for the library function. Thus, if you need to
639 distinguish among various library functions, you can do so by their names.
640 Note that "library function" in this context means a function used to
641 perform arithmetic, whose name is known specially in the compiler and was
642 not mentioned in the C code being compiled.
644 STACK-SIZE is the number of bytes of arguments passed on the stack. If a
645 variable number of bytes is passed, it is zero, and argument popping will
646 always be the responsibility of the calling function.
648 On the VAX, all functions always pop their arguments, so the definition of
649 this macro is STACK-SIZE. On the 68000, using the standard calling
650 convention, no functions pop their arguments, so the value of the macro is
651 always 0 in this case. But an alternative calling convention is available
652 in which functions that take a fixed number of arguments pop them but other
653 functions (such as `printf') pop nothing (the caller pops all). When this
654 convention is in use, FUNTYPE is examined to determine whether a function
655 takes a fixed number of arguments. */
656 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
658 /* Implement `va_arg'. */
659 #define EXPAND_BUILTIN_VA_ARG(valist, type) \
660 fr30_va_arg (valist, type)
663 /*{{{ Function Arguments in Registers. */
665 /* Nonzero if we do not know how to pass TYPE solely in registers.
666 We cannot do so in the following cases:
668 - if the type has variable size
669 - if the type is marked as addressable (it is required to be constructed
671 - if the type is a structure or union. */
673 #define MUST_PASS_IN_STACK(MODE, TYPE) \
674 (((MODE) == BLKmode) \
676 && TYPE_SIZE (TYPE) != NULL \
677 && (TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST \
678 || TREE_CODE (TYPE) == RECORD_TYPE \
679 || TREE_CODE (TYPE) == UNION_TYPE \
680 || TREE_CODE (TYPE) == QUAL_UNION_TYPE \
681 || TREE_ADDRESSABLE (TYPE))))
683 /* The number of register assigned to holding function arguments. */
685 #define FR30_NUM_ARG_REGS 4
687 /* A C expression that controls whether a function argument is passed in a
688 register, and which register.
690 The usual way to make the ANSI library `stdarg.h' work on a machine where
691 some arguments are usually passed in registers, is to cause nameless
692 arguments to be passed on the stack instead. This is done by making
693 `FUNCTION_ARG' return 0 whenever NAMED is 0.
695 You may use the macro `MUST_PASS_IN_STACK (MODE, TYPE)' in the definition of
696 this macro to determine if this argument is of a type that must be passed in
697 the stack. If `REG_PARM_STACK_SPACE' is not defined and `FUNCTION_ARG'
698 returns non-zero for such an argument, the compiler will abort. If
699 `REG_PARM_STACK_SPACE' is defined, the argument will be computed in the
700 stack and then loaded into a register. */
702 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
703 ( (NAMED) == 0 ? NULL_RTX \
704 : MUST_PASS_IN_STACK (MODE, TYPE) ? NULL_RTX \
705 : (CUM) >= FR30_NUM_ARG_REGS ? NULL_RTX \
706 : gen_rtx (REG, MODE, CUM + FIRST_ARG_REGNUM))
708 /* A C type for declaring a variable that is used as the first argument of
709 `FUNCTION_ARG' and other related values. For some target machines, the type
710 `int' suffices and can hold the number of bytes of argument so far.
712 There is no need to record in `CUMULATIVE_ARGS' anything about the arguments
713 that have been passed on the stack. The compiler has other variables to
714 keep track of that. For target machines on which all arguments are passed
715 on the stack, there is no need to store anything in `CUMULATIVE_ARGS';
716 however, the data structure must exist and should not be empty, so use
718 /* On the FR30 this value is an accumulating count of the number of argument
719 registers that have been filled with argument values, as opposed to say,
720 the number of bytes of argument accumulated so far. */
721 #define CUMULATIVE_ARGS int
723 /* A C expression for the number of words, at the beginning of an argument,
724 must be put in registers. The value must be zero for arguments that are
725 passed entirely in registers or that are entirely pushed on the stack.
727 On some machines, certain arguments must be passed partially in registers
728 and partially in memory. On these machines, typically the first N words of
729 arguments are passed in registers, and the rest on the stack. If a
730 multi-word argument (a `double' or a structure) crosses that boundary, its
731 first few words must be passed in registers and the rest must be pushed.
732 This macro tells the compiler when this occurs, and how many of the words
733 should go in registers.
735 `FUNCTION_ARG' for these arguments should return the first register to be
736 used by the caller for this argument; likewise `FUNCTION_INCOMING_ARG', for
737 the called function. */
738 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
739 fr30_function_arg_partial_nregs (CUM, MODE, TYPE, NAMED)
741 /* A C expression that indicates when an argument must be passed by reference.
742 If nonzero for an argument, a copy of that argument is made in memory and a
743 pointer to the argument is passed instead of the argument itself. The
744 pointer is passed in whatever way is appropriate for passing a pointer to
747 On machines where `REG_PARM_STACK_SPACE' is not defined, a suitable
748 definition of this macro might be:
749 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
750 MUST_PASS_IN_STACK (MODE, TYPE) */
751 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
752 MUST_PASS_IN_STACK (MODE, TYPE)
754 /* A C statement (sans semicolon) for initializing the variable CUM for the
755 state at the beginning of the argument list. The variable has type
756 `CUMULATIVE_ARGS'. The value of FNTYPE is the tree node for the data type
757 of the function which will receive the args, or 0 if the args are to a
758 compiler support library function. The value of INDIRECT is nonzero when
759 processing an indirect call, for example a call through a function pointer.
760 The value of INDIRECT is zero for a call to an explicitly named function, a
761 library function call, or when `INIT_CUMULATIVE_ARGS' is used to find
762 arguments for the function being compiled.
764 When processing a call to a compiler support library function, LIBNAME
765 identifies which one. It is a `symbol_ref' rtx which contains the name of
766 the function, as a string. LIBNAME is 0 when an ordinary C function call is
767 being processed. Thus, each time this macro is called, either LIBNAME or
768 FNTYPE is nonzero, but never both of them at once. */
769 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) (CUM) = 0
771 /* A C statement (sans semicolon) to update the summarizer variable CUM to
772 advance past an argument in the argument list. The values MODE, TYPE and
773 NAMED describe that argument. Once this is done, the variable CUM is
774 suitable for analyzing the *following* argument with `FUNCTION_ARG', etc.
776 This macro need not do anything if the argument in question was passed on
777 the stack. The compiler knows how to track the amount of stack space used
778 for arguments without any special help. */
779 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
780 (CUM) += (NAMED) * fr30_num_arg_regs (MODE, TYPE)
782 /* A C expression that is nonzero if REGNO is the number of a hard register in
783 which function arguments are sometimes passed. This does *not* include
784 implicit arguments such as the static chain and the structure-value address.
785 On many machines, no registers can be used for this purpose since all
786 function arguments are pushed on the stack. */
787 #define FUNCTION_ARG_REGNO_P(REGNO) \
788 ((REGNO) >= FIRST_ARG_REGNUM && ((REGNO) < FIRST_ARG_REGNUM + FR30_NUM_ARG_REGS))
791 /*{{{ How Scalar Function Values are Returned. */
793 /* A C expression to create an RTX representing the place where a function
794 returns a value of data type VALTYPE. VALTYPE is a tree node representing a
795 data type. Write `TYPE_MODE (VALTYPE)' to get the machine mode used to
796 represent that type. On many machines, only the mode is relevant.
797 (Actually, on most machines, scalar values are returned in the same place
800 If `PROMOTE_FUNCTION_RETURN' is defined, you must apply the same promotion
801 rules specified in `PROMOTE_MODE' if VALTYPE is a scalar type.
803 If the precise function being called is known, FUNC is a tree node
804 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This makes it
805 possible to use a different value-returning convention for specific
806 functions when all their calls are known.
808 `FUNCTION_VALUE' is not used for return vales with aggregate data types,
809 because these are returned in another way. See `STRUCT_VALUE_REGNUM' and
810 related macros, below. */
811 #define FUNCTION_VALUE(VALTYPE, FUNC) \
812 gen_rtx_REG (TYPE_MODE (VALTYPE), RETURN_VALUE_REGNUM)
814 /* A C expression to create an RTX representing the place where a library
815 function returns a value of mode MODE. If the precise function being called
816 is known, FUNC is a tree node (`FUNCTION_DECL') for it; otherwise, FUNC is a
817 null pointer. This makes it possible to use a different value-returning
818 convention for specific functions when all their calls are known.
820 Note that "library function" in this context means a compiler support
821 routine, used to perform arithmetic, whose name is known specially by the
822 compiler and was not mentioned in the C code being compiled.
824 The definition of `LIBRARY_VALUE' need not be concerned aggregate data
825 types, because none of the library functions returns such types. */
826 #define LIBCALL_VALUE(MODE) gen_rtx (REG, MODE, RETURN_VALUE_REGNUM)
828 /* A C expression that is nonzero if REGNO is the number of a hard register in
829 which the values of called function may come back. */
831 #define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == RETURN_VALUE_REGNUM)
834 /*{{{ How Large Values are Returned. */
836 /* Define this macro to be 1 if all structure and union return values must be
837 in memory. Since this results in slower code, this should be defined only
838 if needed for compatibility with other compilers or with an ABI. If you
839 define this macro to be 0, then the conventions used for structure and union
840 return values are decided by the `RETURN_IN_MEMORY' macro.
842 If not defined, this defaults to the value 1. */
843 #define DEFAULT_PCC_STRUCT_RETURN 1
845 /* If the structure value address is not passed in a register, define
846 `STRUCT_VALUE' as an expression returning an RTX for the place where the
847 address is passed. If it returns 0, the address is passed as an "invisible"
849 #define STRUCT_VALUE 0
852 /*{{{ Generating Code for Profiling. */
854 /* A C statement or compound statement to output to FILE some assembler code to
855 call the profiling subroutine `mcount'. Before calling, the assembler code
856 must load the address of a counter variable into a register where `mcount'
857 expects to find the address. The name of this variable is `LP' followed by
858 the number LABELNO, so you would generate the name using `LP%d' in a
861 The details of how the address should be passed to `mcount' are determined
862 by your operating system environment, not by GNU CC. To figure them out,
863 compile a small program for profiling using the system's installed C
864 compiler and look at the assembler code that results. */
865 #define FUNCTION_PROFILER(FILE, LABELNO) \
867 fprintf (FILE, "\t mov rp, r1\n" ); \
868 fprintf (FILE, "\t ldi:32 mcount, r0\n" ); \
869 fprintf (FILE, "\t call @r0\n" ); \
870 fprintf (FILE, ".word\tLP%d\n", LABELNO); \
874 /*{{{ Implementing the VARARGS Macros. */
876 /* This macro offers an alternative to using `__builtin_saveregs' and defining
877 the macro `EXPAND_BUILTIN_SAVEREGS'. Use it to store the anonymous register
878 arguments into the stack so that all the arguments appear to have been
879 passed consecutively on the stack. Once this is done, you can use the
880 standard implementation of varargs that works for machines that pass all
881 their arguments on the stack.
883 The argument ARGS_SO_FAR is the `CUMULATIVE_ARGS' data structure, containing
884 the values that obtain after processing of the named arguments. The
885 arguments MODE and TYPE describe the last named argument--its machine mode
886 and its data type as a tree node.
888 The macro implementation should do two things: first, push onto the stack
889 all the argument registers *not* used for the named arguments, and second,
890 store the size of the data thus pushed into the `int'-valued variable whose
891 name is supplied as the argument PRETEND_ARGS_SIZE. The value that you
892 store here will serve as additional offset for setting up the stack frame.
894 Because you must generate code to push the anonymous arguments at compile
895 time without knowing their data types, `SETUP_INCOMING_VARARGS' is only
896 useful on machines that have just a single category of argument register and
897 use it uniformly for all data types.
899 If the argument SECOND_TIME is nonzero, it means that the arguments of the
900 function are being analyzed for the second time. This happens for an inline
901 function, which is not actually compiled until the end of the source file.
902 The macro `SETUP_INCOMING_VARARGS' should not generate any instructions in
904 #define SETUP_INCOMING_VARARGS(ARGS_SO_FAR, MODE, TYPE, PRETEND_ARGS_SIZE, SECOND_TIME) \
906 fr30_setup_incoming_varargs (ARGS_SO_FAR, MODE, TYPE, & PRETEND_ARGS_SIZE)
908 /* Define this macro if the location where a function argument is passed
909 depends on whether or not it is a named argument.
911 This macro controls how the NAMED argument to `FUNCTION_ARG' is set for
912 varargs and stdarg functions. With this macro defined, the NAMED argument
913 is always true for named arguments, and false for unnamed arguments. If
914 this is not defined, but `SETUP_INCOMING_VARARGS' is defined, then all
915 arguments are treated as named. Otherwise, all named arguments except the
916 last are treated as named. */
917 #define STRICT_ARGUMENT_NAMING 0
920 /*{{{ Trampolines for Nested Functions. */
922 /* On the FR30, the trampoline is:
930 The no-ops are to guarantee that the static chain and final
931 target are 32 bit ailgned within the trampoline. That allows us to
932 initialize those locations with simple SImode stores. The alternative
933 would be to use HImode stores. */
935 /* A C statement to output, on the stream FILE, assembler code for a block of
936 data that contains the constant parts of a trampoline. This code should not
937 include a label--the label is taken care of automatically. */
938 #define TRAMPOLINE_TEMPLATE(FILE) \
940 fprintf (FILE, "\tnop\n"); \
941 fprintf (FILE, "\tldi:32\t#0, %s\n", reg_names [STATIC_CHAIN_REGNUM]); \
942 fprintf (FILE, "\tnop\n"); \
943 fprintf (FILE, "\tldi:32\t#0, %s\n", reg_names [COMPILER_SCRATCH_REGISTER]); \
944 fprintf (FILE, "\tjmp\t@%s\n", reg_names [COMPILER_SCRATCH_REGISTER]); \
947 /* A C expression for the size in bytes of the trampoline, as an integer. */
948 #define TRAMPOLINE_SIZE 18
950 /* We want the trampoline to be aligned on a 32bit boundary so that we can
951 make sure the location of the static chain & target function within
952 the trampoline is also aligned on a 32bit boundary. */
953 #define TRAMPOLINE_ALIGNMENT 32
955 /* A C statement to initialize the variable parts of a trampoline. ADDR is an
956 RTX for the address of the trampoline; FNADDR is an RTX for the address of
957 the nested function; STATIC_CHAIN is an RTX for the static chain value that
958 should be passed to the function when it is called. */
959 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \
962 emit_move_insn (gen_rtx (MEM, SImode, plus_constant (ADDR, 4)), STATIC_CHAIN);\
963 emit_move_insn (gen_rtx (MEM, SImode, plus_constant (ADDR, 12)), FNADDR); \
967 /*{{{ Addressing Modes. */
969 /* A C expression that is 1 if the RTX X is a constant which is a valid
970 address. On most machines, this can be defined as `CONSTANT_P (X)', but a
971 few machines are more restrictive in which constant addresses are supported.
973 `CONSTANT_P' accepts integer-values expressions whose values are not
974 explicitly known, such as `symbol_ref', `label_ref', and `high' expressions
975 and `const' arithmetic expressions, in addition to `const_int' and
976 `const_double' expressions. */
977 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
979 /* A number, the maximum number of registers that can appear in a valid memory
980 address. Note that it is up to you to specify a value equal to the maximum
981 number that `GO_IF_LEGITIMATE_ADDRESS' would ever accept. */
982 #define MAX_REGS_PER_ADDRESS 1
984 /* A C compound statement with a conditional `goto LABEL;' executed if X (an
985 RTX) is a legitimate memory address on the target machine for a memory
986 operand of mode MODE. */
988 /* On the FR30 we only have one real addressing mode - an address in a
989 register. There are three special cases however:
991 * indexed addressing using small positive offsets from the stack pointer
993 * indexed addressing using small signed offsets from the frame pointer
995 * register plus register addresing using R13 as the base register.
997 At the moment we only support the first two of these special cases. */
1000 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
1003 if (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X)) \
1005 if (GET_CODE (X) == PLUS \
1006 && ((MODE) == SImode || (MODE) == SFmode) \
1007 && XEXP (X, 0) == stack_pointer_rtx \
1008 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1009 && IN_RANGE (INTVAL (XEXP (X, 1)), 0, (1 << 6) - 4)) \
1011 if (GET_CODE (X) == PLUS \
1012 && ((MODE) == SImode || (MODE) == SFmode) \
1013 && XEXP (X, 0) == frame_pointer_rtx \
1014 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1015 && IN_RANGE (INTVAL (XEXP (X, 1)), -(1 << 9), (1 << 9) - 4)) \
1020 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
1023 if (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X)) \
1025 if (GET_CODE (X) == PLUS \
1026 && ((MODE) == SImode || (MODE) == SFmode) \
1027 && XEXP (X, 0) == stack_pointer_rtx \
1028 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1029 && IN_RANGE (INTVAL (XEXP (X, 1)), 0, (1 << 6) - 4)) \
1031 if (GET_CODE (X) == PLUS \
1032 && ((MODE) == SImode || (MODE) == SFmode) \
1033 && GET_CODE (XEXP (X, 0)) == REG \
1034 && (REGNO (XEXP (X, 0)) == FRAME_POINTER_REGNUM \
1035 || REGNO (XEXP (X, 0)) == ARG_POINTER_REGNUM) \
1036 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1037 && IN_RANGE (INTVAL (XEXP (X, 1)), -(1 << 9), (1 << 9) - 4)) \
1043 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
1044 use as a base register. For hard registers, it should always accept those
1045 which the hardware permits and reject the others. Whether the macro accepts
1046 or rejects pseudo registers must be controlled by `REG_OK_STRICT' as
1047 described above. This usually requires two variant definitions, of which
1048 `REG_OK_STRICT' controls the one actually used. */
1049 #ifdef REG_OK_STRICT
1050 #define REG_OK_FOR_BASE_P(X) (((unsigned) REGNO (X)) <= STACK_POINTER_REGNUM)
1052 #define REG_OK_FOR_BASE_P(X) 1
1055 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
1056 use as an index register.
1058 The difference between an index register and a base register is that the
1059 index register may be scaled. If an address involves the sum of two
1060 registers, neither one of them scaled, then either one may be labeled the
1061 "base" and the other the "index"; but whichever labeling is used must fit
1062 the machine's constraints of which registers may serve in each capacity.
1063 The compiler will try both labelings, looking for one that is valid, and
1064 will reload one or both registers only if neither labeling works. */
1065 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
1067 /* A C compound statement that attempts to replace X with a valid memory
1068 address for an operand of mode MODE. WIN will be a C statement label
1069 elsewhere in the code; the macro definition may use
1071 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN);
1073 to avoid further processing if the address has become legitimate.
1075 X will always be the result of a call to `break_out_memory_refs', and OLDX
1076 will be the operand that was given to that function to produce X.
1078 The code generated by this macro should not alter the substructure of X. If
1079 it transforms X into a more legitimate form, it should assign X (which will
1080 always be a C variable) a new value.
1082 It is not necessary for this macro to come up with a legitimate address.
1083 The compiler has standard ways of doing so in all cases. In fact, it is
1084 safe for this macro to do nothing. But often a machine-dependent strategy
1085 can generate better code. */
1086 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)
1088 /* A C statement or compound statement with a conditional `goto LABEL;'
1089 executed if memory address X (an RTX) can have different meanings depending
1090 on the machine mode of the memory reference it is used for or if the address
1091 is valid for some modes but not others.
1093 Autoincrement and autodecrement addresses typically have mode-dependent
1094 effects because the amount of the increment or decrement is the size of the
1095 operand being addressed. Some machines have other mode-dependent addresses.
1096 Many RISC machines have no mode-dependent addresses.
1098 You may assume that ADDR is a valid address for the machine. */
1099 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL)
1101 /* A C expression that is nonzero if X is a legitimate constant for an
1102 immediate operand on the target machine. You can assume that X satisfies
1103 `CONSTANT_P', so you need not check this. In fact, `1' is a suitable
1104 definition for this macro on machines where anything `CONSTANT_P' is valid. */
1105 #define LEGITIMATE_CONSTANT_P(X) 1
1108 /*{{{ Describing Relative Costs of Operations */
1110 /* Define this macro as a C expression which is nonzero if accessing less than
1111 a word of memory (i.e. a `char' or a `short') is no faster than accessing a
1112 word of memory, i.e., if such access require more than one instruction or if
1113 there is no difference in cost between byte and (aligned) word loads.
1115 When this macro is not defined, the compiler will access a field by finding
1116 the smallest containing object; when it is defined, a fullword load will be
1117 used if alignment permits. Unless bytes accesses are faster than word
1118 accesses, using word accesses is preferable since it may eliminate
1119 subsequent memory access if subsequent accesses occur to other fields in the
1120 same word of the structure, but to different bytes. */
1121 #define SLOW_BYTE_ACCESS 1
1124 /*{{{ Dividing the output into sections. */
1126 /* A C expression whose value is a string containing the assembler operation
1127 that should precede instructions and read-only data. Normally `".text"' is
1129 #define TEXT_SECTION_ASM_OP "\t.text"
1131 /* A C expression whose value is a string containing the assembler operation to
1132 identify the following data as writable initialized data. Normally
1133 `".data"' is right. */
1134 #define DATA_SECTION_ASM_OP "\t.data"
1136 /* If defined, a C expression whose value is a string containing the
1137 assembler operation to identify the following data as
1138 uninitialized global data. If not defined, and neither
1139 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
1140 uninitialized global data will be output in the data section if
1141 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
1143 #define BSS_SECTION_ASM_OP "\t.section .bss"
1146 /*{{{ The Overall Framework of an Assembler File. */
1148 /* A C string constant describing how to begin a comment in the target
1149 assembler language. The compiler assumes that the comment will end at the
1151 #define ASM_COMMENT_START ";"
1153 /* A C string constant for text to be output before each `asm' statement or
1154 group of consecutive ones. Normally this is `"#APP"', which is a comment
1155 that has no effect on most assemblers but tells the GNU assembler that it
1156 must check the lines that follow for all valid assembler constructs. */
1157 #define ASM_APP_ON "#APP\n"
1159 /* A C string constant for text to be output after each `asm' statement or
1160 group of consecutive ones. Normally this is `"#NO_APP"', which tells the
1161 GNU assembler to resume making the time-saving assumptions that are valid
1162 for ordinary compiler output. */
1163 #define ASM_APP_OFF "#NO_APP\n"
1166 /*{{{ Output and Generation of Labels. */
1168 /* Globalizing directive for a label. */
1169 #define GLOBAL_ASM_OP "\t.globl "
1171 /* A C expression to assign to OUTVAR (which is a variable of type `char *') a
1172 newly allocated string made from the string NAME and the number NUMBER, with
1173 some suitable punctuation added. Use `alloca' to get space for the string.
1175 The string will be used as an argument to `ASM_OUTPUT_LABELREF' to produce
1176 an assembler label for an internal static variable whose name is NAME.
1177 Therefore, the string must be such as to result in valid assembler code.
1178 The argument NUMBER is different each time this macro is executed; it
1179 prevents conflicts between similarly-named internal static variables in
1182 Ideally this string should not be a valid C identifier, to prevent any
1183 conflict with the user's own symbols. Most assemblers allow periods or
1184 percent signs in assembler symbols; putting at least one of these between
1185 the name and the number will suffice. */
1186 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR, NAME, NUMBER) \
1189 (OUTVAR) = (char *) alloca (strlen ((NAME)) + 12); \
1190 sprintf ((OUTVAR), "%s.%ld", (NAME), (long)(NUMBER)); \
1195 /*{{{ Output of Assembler Instructions. */
1197 /* A C compound statement to output to stdio stream STREAM the assembler syntax
1198 for an instruction operand X. X is an RTL expression.
1200 CODE is a value that can be used to specify one of several ways of printing
1201 the operand. It is used when identical operands must be printed differently
1202 depending on the context. CODE comes from the `%' specification that was
1203 used to request printing of the operand. If the specification was just
1204 `%DIGIT' then CODE is 0; if the specification was `%LTR DIGIT' then CODE is
1205 the ASCII code for LTR.
1207 If X is a register, this macro should print the register's name. The names
1208 can be found in an array `reg_names' whose type is `char *[]'. `reg_names'
1209 is initialized from `REGISTER_NAMES'.
1211 When the machine description has a specification `%PUNCT' (a `%' followed by
1212 a punctuation character), this macro is called with a null pointer for X and
1213 the punctuation character for CODE. */
1214 #define PRINT_OPERAND(STREAM, X, CODE) fr30_print_operand (STREAM, X, CODE)
1216 /* A C expression which evaluates to true if CODE is a valid punctuation
1217 character for use in the `PRINT_OPERAND' macro. If
1218 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no punctuation
1219 characters (except for the standard one, `%') are used in this way. */
1220 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) (CODE == '#')
1222 /* A C compound statement to output to stdio stream STREAM the assembler syntax
1223 for an instruction operand that is a memory reference whose address is X. X
1224 is an RTL expression. */
1226 #define PRINT_OPERAND_ADDRESS(STREAM, X) fr30_print_operand_address (STREAM, X)
1228 /* If defined, C string expressions to be used for the `%R', `%L', `%U', and
1229 `%I' options of `asm_fprintf' (see `final.c'). These are useful when a
1230 single `md' file must support multiple assembler formats. In that case, the
1231 various `tm.h' files can define these macros differently.
1233 USER_LABEL_PREFIX is defined in svr4.h. */
1234 #define REGISTER_PREFIX "%"
1235 #define LOCAL_LABEL_PREFIX "."
1236 #define USER_LABEL_PREFIX ""
1237 #define IMMEDIATE_PREFIX ""
1240 /*{{{ Output of Dispatch Tables. */
1242 /* This macro should be provided on machines where the addresses in a dispatch
1243 table are relative to the table's own address.
1245 The definition should be a C statement to output to the stdio stream STREAM
1246 an assembler pseudo-instruction to generate a difference between two labels.
1247 VALUE and REL are the numbers of two internal labels. The definitions of
1248 these labels are output using `ASM_OUTPUT_INTERNAL_LABEL', and they must be
1249 printed in the same way here. For example,
1251 fprintf (STREAM, "\t.word L%d-L%d\n", VALUE, REL) */
1252 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
1253 fprintf (STREAM, "\t.word .L%d-.L%d\n", VALUE, REL)
1255 /* This macro should be provided on machines where the addresses in a dispatch
1258 The definition should be a C statement to output to the stdio stream STREAM
1259 an assembler pseudo-instruction to generate a reference to a label. VALUE
1260 is the number of an internal label whose definition is output using
1261 `ASM_OUTPUT_INTERNAL_LABEL'. For example,
1263 fprintf (STREAM, "\t.word L%d\n", VALUE) */
1264 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
1265 fprintf (STREAM, "\t.word .L%d\n", VALUE)
1268 /*{{{ Assembler Commands for Alignment. */
1270 /* A C statement to output to the stdio stream STREAM an assembler command to
1271 advance the location counter to a multiple of 2 to the POWER bytes. POWER
1272 will be a C expression of type `int'. */
1273 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
1274 fprintf ((STREAM), "\t.p2align %d\n", (POWER))
1277 /*{{{ Miscellaneous Parameters. */
1279 /* An alias for a machine mode name. This is the machine mode that elements of
1280 a jump-table should have. */
1281 #define CASE_VECTOR_MODE SImode
1283 /* The maximum number of bytes that a single instruction can move quickly from
1284 memory to memory. */
1287 /* A C expression which is nonzero if on this machine it is safe to "convert"
1288 an integer of INPREC bits to one of OUTPREC bits (where OUTPREC is smaller
1289 than INPREC) by merely operating on it as if it had only OUTPREC bits.
1291 On many machines, this expression can be 1.
1293 When `TRULY_NOOP_TRUNCATION' returns 1 for a pair of sizes for modes for
1294 which `MODES_TIEABLE_P' is 0, suboptimal code can result. If this is the
1295 case, making `TRULY_NOOP_TRUNCATION' return 0 in such cases may improve
1297 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1299 /* An alias for the machine mode for pointers. On most machines, define this
1300 to be the integer mode corresponding to the width of a hardware pointer;
1301 `SImode' on 32-bit machine or `DImode' on 64-bit machines. On some machines
1302 you must define this to be one of the partial integer modes, such as
1305 The width of `Pmode' must be at least as large as the value of
1306 `POINTER_SIZE'. If it is not equal, you must define the macro
1307 `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to `Pmode'. */
1308 #define Pmode SImode
1310 /* An alias for the machine mode used for memory references to functions being
1311 called, in `call' RTL expressions. On most machines this should be
1313 #define FUNCTION_MODE QImode
1315 /* If cross-compiling, don't require stdio.h etc to build libgcc.a. */
1316 #if defined CROSS_COMPILE && ! defined inhibit_libc
1317 #define inhibit_libc
1321 /*{{{ Exported variables */
1323 /* Define the information needed to generate branch and scc insns. This is
1324 stored from the compare operation. Note that we can't use "rtx" here
1325 since it hasn't been defined! */
1327 extern struct rtx_def
* fr30_compare_op0
;
1328 extern struct rtx_def
* fr30_compare_op1
;
1331 /*{{{ PERDICATE_CODES. */
1333 #define PREDICATE_CODES \
1334 { "stack_add_operand", { CONST_INT }}, \
1335 { "high_register_operand", { REG }}, \
1336 { "low_register_operand", { REG }}, \
1337 { "call_operand", { MEM }}, \
1338 { "fp_displacement_operand", { CONST_INT }}, \
1339 { "sp_displacement_operand", { CONST_INT }}, \
1340 { "di_operand", { CONST_INT, CONST_DOUBLE, REG, MEM }}, \
1341 { "nonimmediate_di_operand", { REG, MEM }}, \
1342 { "add_immediate_operand", { REG, CONST_INT }},
1346 /* Local Variables: */
1347 /* folded-file: t */
This page took 0.112921 seconds and 6 git commands to generate.