3 /* Definitions of FR30 target.
4 Copyright (C) 1998, 1999, 2000 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. */
27 /* Set up System V.4 (aka ELF) defaults. */
30 /* Include prototyping macros */
31 #include "gansidecl.h"
34 /*{{{ Driver configuration. */
36 /* A C expression which determines whether the option `-CHAR' takes arguments.
37 The value should be the number of arguments that option takes-zero, for many
40 By default, this macro is defined to handle the standard options properly.
41 You need not define it unless you wish to add additional options which take
45 #undef SWITCH_TAKES_ARG
47 /* A C expression which determines whether the option `-NAME' takes arguments.
48 The value should be the number of arguments that option takes-zero, for many
49 options. This macro rather than `SWITCH_TAKES_ARG' is used for
50 multi-character option names.
52 By default, this macro is defined as `DEFAULT_WORD_SWITCH_TAKES_ARG', which
53 handles the standard options properly. You need not define
54 `WORD_SWITCH_TAKES_ARG' unless you wish to add additional options which take
55 arguments. Any redefinition should call `DEFAULT_WORD_SWITCH_TAKES_ARG' and
56 then check for additional options.
59 #undef WORD_SWITCH_TAKES_ARG
62 /*{{{ Run-time target specifications. */
65 #define ASM_SPEC "%{v}"
67 /* Define this to be a string constant containing `-D' options to define the
68 predefined macros that identify this machine and system. These macros will
69 be predefined unless the `-ansi' option is specified. */
71 #define CPP_PREDEFINES "-Dfr30 -D__fr30__ -Amachine(fr30)"
73 /* Use LDI:20 instead of LDI:32 to load addresses. */
74 #define TARGET_SMALL_MODEL_MASK (1 << 0)
75 #define TARGET_SMALL_MODEL (target_flags & TARGET_SMALL_MODEL_MASK)
77 #define TARGET_DEFAULT 0
79 /* This declaration should be present. */
80 extern int target_flags;
82 #define TARGET_SWITCHES \
84 { "small-model", TARGET_SMALL_MODEL_MASK, \
85 N_("Assume small address space") }, \
86 { "no-small-model", - TARGET_SMALL_MODEL_MASK, "" }, \
87 { "no-lsim", 0, "" }, \
88 { "", TARGET_DEFAULT, "" } \
91 #define TARGET_VERSION fprintf (stderr, " (fr30)");
93 /* Define this macro if debugging can be performed even without a frame
94 pointer. If this macro is defined, GNU CC will turn on the
95 `-fomit-frame-pointer' option whenever `-O' is specified. */
96 #define CAN_DEBUG_WITHOUT_FP
99 #define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s"
101 /* Include the OS stub library, so that the code can be simulated.
102 This is not the right way to do this. Ideally this kind of thing
103 should be done in the linker script - but I have not worked out how
104 to specify the location of a linker script in a gcc command line yet... */
106 #define ENDFILE_SPEC "%{!mno-lsim:-lsim} crtend.o%s crtn.o%s"
109 /*{{{ Storage Layout. */
111 /* Define this macro to have the value 1 if the most significant bit in a byte
112 has the lowest number; otherwise define it to have the value zero. This
113 means that bit-field instructions count from the most significant bit. If
114 the machine has no bit-field instructions, then this must still be defined,
115 but it doesn't matter which value it is defined to. This macro need not be
118 This macro does not affect the way structure fields are packed into bytes or
119 words; that is controlled by `BYTES_BIG_ENDIAN'. */
120 #define BITS_BIG_ENDIAN 1
122 /* Define this macro to have the value 1 if the most significant byte in a word
123 has the lowest number. This macro need not be a constant. */
124 #define BYTES_BIG_ENDIAN 1
126 /* Define this macro to have the value 1 if, in a multiword object, the most
127 significant word has the lowest number. This applies to both memory
128 locations and registers; GNU CC fundamentally assumes that the order of
129 words in memory is the same as the order in registers. This macro need not
131 #define WORDS_BIG_ENDIAN 1
133 /* Define this macro to be the number of bits in an addressable storage unit
134 (byte); normally 8. */
135 #define BITS_PER_UNIT 8
137 /* Number of bits in a word; normally 32. */
138 #define BITS_PER_WORD 32
140 /* Number of storage units in a word; normally 4. */
141 #define UNITS_PER_WORD 4
143 /* Width of a pointer, in bits. You must specify a value no wider than the
144 width of `Pmode'. If it is not equal to the width of `Pmode', you must
145 define `POINTERS_EXTEND_UNSIGNED'. */
146 #define POINTER_SIZE 32
148 /* A macro to update MODE and UNSIGNEDP when an object whose type is TYPE and
149 which has the specified mode and signedness is to be stored in a register.
150 This macro is only called when TYPE is a scalar type.
152 On most RISC machines, which only have operations that operate on a full
153 register, define this macro to set M to `word_mode' if M is an integer mode
154 narrower than `BITS_PER_WORD'. In most cases, only integer modes should be
155 widened because wider-precision floating-point operations are usually more
156 expensive than their narrower counterparts.
158 For most machines, the macro definition does not change UNSIGNEDP. However,
159 some machines, have instructions that preferentially handle either signed or
160 unsigned quantities of certain modes. For example, on the DEC Alpha, 32-bit
161 loads from memory and 32-bit add instructions sign-extend the result to 64
162 bits. On such machines, set UNSIGNEDP according to which kind of extension
165 Do not define this macro if it would never modify MODE. */
166 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
169 if (GET_MODE_CLASS (MODE) == MODE_INT \
170 && GET_MODE_SIZE (MODE) < 4) \
175 /* Normal alignment required for function parameters on the stack, in bits.
176 All stack parameters receive at least this much alignment regardless of data
177 type. On most machines, this is the same as the size of an integer. */
178 #define PARM_BOUNDARY 32
180 /* Define this macro if you wish to preserve a certain alignment for the stack
181 pointer. The definition is a C expression for the desired alignment
184 If `PUSH_ROUNDING' is not defined, the stack will always be aligned to the
185 specified boundary. If `PUSH_ROUNDING' is defined and specifies a less
186 strict alignment than `STACK_BOUNDARY', the stack may be momentarily
187 unaligned while pushing arguments. */
188 #define STACK_BOUNDARY 32
190 /* Alignment required for a function entry point, in bits. */
191 #define FUNCTION_BOUNDARY 32
193 /* Biggest alignment that any data type can require on this machine,
195 #define BIGGEST_ALIGNMENT 32
197 /* If defined, a C expression to compute the alignment for a static variable.
198 TYPE is the data type, and ALIGN is the alignment that the object
199 would ordinarily have. The value of this macro is used instead of that
200 alignment to align the object.
202 If this macro is not defined, then ALIGN is used.
204 One use of this macro is to increase alignment of medium-size data to make
205 it all fit in fewer cache lines. Another is to cause character arrays to be
206 word-aligned so that `strcpy' calls that copy constants to character arrays
207 can be done inline. */
208 #define DATA_ALIGNMENT(TYPE, ALIGN) \
209 (TREE_CODE (TYPE) == ARRAY_TYPE \
210 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
211 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
213 /* If defined, a C expression to compute the alignment given to a constant that
214 is being placed in memory. CONSTANT is the constant and ALIGN is the
215 alignment that the object would ordinarily have. The value of this macro is
216 used instead of that alignment to align the object.
218 If this macro is not defined, then ALIGN is used.
220 The typical use of this macro is to increase alignment for string constants
221 to be word aligned so that `strcpy' calls that copy constants can be done
223 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
224 (TREE_CODE (EXP) == STRING_CST \
225 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
227 /* Define this macro to be the value 1 if instructions will fail to work if
228 given data not on the nominal alignment. If instructions will merely go
229 slower in that case, define this macro as 0. */
230 #define STRICT_ALIGNMENT 1
232 /* Define this if you wish to imitate the way many other C compilers handle
233 alignment of bitfields and the structures that contain them.
235 The behavior is that the type written for a bitfield (`int', `short', or
236 other integer type) imposes an alignment for the entire structure, as if the
237 structure really did contain an ordinary field of that type. In addition,
238 the bitfield is placed within the structure so that it would fit within such
239 a field, not crossing a boundary for it.
241 Thus, on most machines, a bitfield whose type is written as `int' would not
242 cross a four-byte boundary, and would force four-byte alignment for the
243 whole structure. (The alignment used may not be four bytes; it is
244 controlled by the other alignment parameters.)
246 If the macro is defined, its definition should be a C expression; a nonzero
247 value for the expression enables this behavior.
249 Note that if this macro is not defined, or its value is zero, some bitfields
250 may cross more than one alignment boundary. The compiler can support such
251 references if there are `insv', `extv', and `extzv' insns that can directly
254 The other known way of making bitfields work is to define
255 `STRUCTURE_SIZE_BOUNDARY' as large as `BIGGEST_ALIGNMENT'. Then every
256 structure can be accessed with fullwords.
258 Unless the machine has bitfield instructions or you define
259 `STRUCTURE_SIZE_BOUNDARY' that way, you must define
260 `PCC_BITFIELD_TYPE_MATTERS' to have a nonzero value.
262 If your aim is to make GNU CC use the same conventions for laying out
263 bitfields as are used by another compiler, here is how to investigate what
264 the other compiler does. Compile and run this program:
282 printf ("Size of foo1 is %d\n",
283 sizeof (struct foo1));
284 printf ("Size of foo2 is %d\n",
285 sizeof (struct foo2));
289 If this prints 2 and 5, then the compiler's behavior is what you would get
290 from `PCC_BITFIELD_TYPE_MATTERS'.
292 Defined in svr4.h. */
293 #define PCC_BITFIELD_TYPE_MATTERS 1
295 /* A code distinguishing the floating point format of the target machine.
296 There are three defined values:
299 This code indicates IEEE floating point. It is the default;
300 there is no need to define this macro when the format is IEEE.
303 This code indicates the peculiar format used on the Vax.
305 UNKNOWN_FLOAT_FORMAT'
306 This code indicates any other format.
308 The value of this macro is compared with `HOST_FLOAT_FORMAT'
309 to determine whether the target machine has the same format as
310 the host machine. If any other formats are actually in use on supported
311 machines, new codes should be defined for them.
313 The ordering of the component words of floating point values stored in
314 memory is controlled by `FLOAT_WORDS_BIG_ENDIAN' for the target machine and
315 `HOST_FLOAT_WORDS_BIG_ENDIAN' for the host. */
316 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
318 /* GNU CC supports two ways of implementing C++ vtables: traditional or with
319 so-called "thunks". The flag `-fvtable-thunk' chooses between them. Define
320 this macro to be a C expression for the default value of that flag. If
321 `DEFAULT_VTABLE_THUNKS' is 0, GNU CC uses the traditional implementation by
322 default. The "thunk" implementation is more efficient (especially if you
323 have provided an implementation of `ASM_OUTPUT_MI_THUNK', but is not binary
324 compatible with code compiled using the traditional implementation. If you
325 are writing a new ports, define `DEFAULT_VTABLE_THUNKS' to 1.
327 If you do not define this macro, the default for `-fvtable-thunk' is 0. */
328 #define DEFAULT_VTABLE_THUNKS 1
331 /*{{{ Layout of Source Language Data Types. */
333 #define CHAR_TYPE_SIZE 8
334 #define SHORT_TYPE_SIZE 16
335 #define INT_TYPE_SIZE 32
336 #define LONG_TYPE_SIZE 32
337 #define LONG_LONG_TYPE_SIZE 64
338 #define FLOAT_TYPE_SIZE 32
339 #define DOUBLE_TYPE_SIZE 64
340 #define LONG_DOUBLE_TYPE_SIZE 64
342 /* An expression whose value is 1 or 0, according to whether the type `char'
343 should be signed or unsigned by default. The user can always override this
344 default with the options `-fsigned-char' and `-funsigned-char'. */
345 #define DEFAULT_SIGNED_CHAR 1
347 #define TARGET_BELL 0x7 /* '\a' */
348 #define TARGET_BS 0x8 /* '\b' */
349 #define TARGET_TAB 0x9 /* '\t' */
350 #define TARGET_NEWLINE 0xa /* '\n' */
351 #define TARGET_VT 0xb /* '\v' */
352 #define TARGET_FF 0xc /* '\f' */
353 #define TARGET_CR 0xd /* '\r' */
356 /*{{{ REGISTER BASICS. */
358 /* Number of hardware registers known to the compiler. They receive numbers 0
359 through `FIRST_PSEUDO_REGISTER-1'; thus, the first pseudo register's number
360 really is assigned the number `FIRST_PSEUDO_REGISTER'. */
361 #define FIRST_PSEUDO_REGISTER 21
363 /* Fixed register assignments: */
365 /* Here we do a BAD THING - reserve a register for use by the machine
366 description file. There are too many places in compiler where it
367 assumes that it can issue a branch or jump instruction without
368 providing a scratch register for it, and reload just cannot cope, so
369 we keep a register back for these situations. */
370 #define COMPILER_SCRATCH_REGISTER 0
372 /* The register that contains the result of a function call. */
373 #define RETURN_VALUE_REGNUM 4
375 /* The first register that can contain the arguments to a function. */
376 #define FIRST_ARG_REGNUM 4
378 /* A call-used register that can be used during the function prologue. */
379 #define PROLOGUE_TMP_REGNUM COMPILER_SCRATCH_REGISTER
381 /* Register numbers used for passing a function's static chain pointer. If
382 register windows are used, the register number as seen by the called
383 function is `STATIC_CHAIN_INCOMING_REGNUM', while the register number as
384 seen by the calling function is `STATIC_CHAIN_REGNUM'. If these registers
385 are the same, `STATIC_CHAIN_INCOMING_REGNUM' need not be defined.
387 The static chain register need not be a fixed register.
389 If the static chain is passed in memory, these macros should not be defined;
390 instead, the next two macros should be defined. */
391 #define STATIC_CHAIN_REGNUM 12
392 /* #define STATIC_CHAIN_INCOMING_REGNUM */
394 /* An FR30 specific hardware register. */
395 #define ACCUMULATOR_REGNUM 13
397 /* The register number of the frame pointer register, which is used to access
398 automatic variables in the stack frame. On some machines, the hardware
399 determines which register this is. On other machines, you can choose any
400 register you wish for this purpose. */
401 #define FRAME_POINTER_REGNUM 14
403 /* The register number of the stack pointer register, which must also be a
404 fixed register according to `FIXED_REGISTERS'. On most machines, the
405 hardware determines which register this is. */
406 #define STACK_POINTER_REGNUM 15
408 /* The following a fake hard registers that describe some of the dedicated
409 registers on the FR30. */
410 #define CONDITION_CODE_REGNUM 16
411 #define RETURN_POINTER_REGNUM 17
412 #define MD_HIGH_REGNUM 18
413 #define MD_LOW_REGNUM 19
415 /* An initializer that says which registers are used for fixed purposes all
416 throughout the compiled code and are therefore not available for general
417 allocation. These would include the stack pointer, the frame pointer
418 (except on machines where that can be used as a general register when no
419 frame pointer is needed), the program counter on machines where that is
420 considered one of the addressable registers, and any other numbered register
423 This information is expressed as a sequence of numbers, separated by commas
424 and surrounded by braces. The Nth number is 1 if register N is fixed, 0
427 The table initialized from this macro, and the table initialized by the
428 following one, may be overridden at run time either automatically, by the
429 actions of the macro `CONDITIONAL_REGISTER_USAGE', or by the user with the
430 command options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'. */
431 #define FIXED_REGISTERS \
432 { 1, 0, 0, 0, 0, 0, 0, 0, /* 0 - 7 */ \
433 0, 0, 0, 0, 0, 0, 0, 1, /* 8 - 15 */ \
434 1, 1, 1, 1, 1 } /* 16 - 20 */
436 /* XXX - MDL and MDH set as fixed for now - this is until I can get the
437 mul patterns working. */
439 /* Like `FIXED_REGISTERS' but has 1 for each register that is clobbered (in
440 general) by function calls as well as for fixed registers. This macro
441 therefore identifies the registers that are not available for general
442 allocation of values that must live across function calls.
444 If a register has 0 in `CALL_USED_REGISTERS', the compiler automatically
445 saves it on function entry and restores it on function exit, if the register
446 is used within the function. */
447 #define CALL_USED_REGISTERS \
448 { 1, 1, 1, 1, 1, 1, 1, 1, /* 0 - 7 */ \
449 0, 0, 0, 0, 1, 1, 0, 1, /* 8 - 15 */ \
450 1, 1, 1, 1, 1 } /* 16 - 20 */
452 /* A C initializer containing the assembler's names for the machine registers,
453 each one as a C string constant. This is what translates register numbers
454 in the compiler into assembler language. */
455 #define REGISTER_NAMES \
456 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
457 "r8", "r9", "r10", "r11", "r12", "ac", "fp", "sp", \
458 "cc", "rp", "mdh", "mdl", "ap" \
461 /* If defined, a C initializer for an array of structures containing a name and
462 a register number. This macro defines additional names for hard registers,
463 thus allowing the `asm' option in declarations to refer to registers using
465 #define ADDITIONAL_REGISTER_NAMES \
467 {"r13", 13}, {"r14", 14}, {"r15", 15}, {"usp", 15}, {"ps", 16}\
471 /*{{{ How Values Fit in Registers. */
473 /* A C expression for the number of consecutive hard registers, starting at
474 register number REGNO, required to hold a value of mode MODE. */
476 #define HARD_REGNO_NREGS(REGNO, MODE) \
477 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
479 /* A C expression that is nonzero if it is permissible to store a value of mode
480 MODE in hard register number REGNO (or in several registers starting with
483 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
485 /* A C expression that is nonzero if it is desirable to choose register
486 allocation so as to avoid move instructions between a value of mode MODE1
487 and a value of mode MODE2.
489 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, MODE2)' are
490 ever different for any R, then `MODES_TIEABLE_P (MODE1, MODE2)' must be
492 #define MODES_TIEABLE_P(MODE1, MODE2) 1
495 /*{{{ Register Classes. */
497 /* An enumeral type that must be defined with all the register class names as
498 enumeral values. `NO_REGS' must be first. `ALL_REGS' must be the last
499 register class, followed by one more enumeral value, `LIM_REG_CLASSES',
500 which is not a register class but rather tells how many classes there are.
502 Each register class has a number, which is the value of casting the class
503 name to type `int'. The number serves as an index in many of the tables
508 MULTIPLY_32_REG, /* the MDL register as used by the MULH, MULUH insns */
509 MULTIPLY_64_REG, /* the MDH,MDL register pair as used by MUL and MULU */
510 LOW_REGS, /* registers 0 through 7 */
511 HIGH_REGS, /* registers 8 through 15 */
512 REAL_REGS, /* ie all the general hardware registers on the FR30 */
517 #define GENERAL_REGS REAL_REGS
518 #define N_REG_CLASSES ((int) LIM_REG_CLASSES)
520 /* An initializer containing the names of the register classes as C string
521 constants. These names are used in writing some of the debugging dumps. */
522 #define REG_CLASS_NAMES \
533 /* An initializer containing the contents of the register classes, as integers
534 which are bit masks. The Nth integer specifies the contents of class N.
535 The way the integer MASK is interpreted is that register R is in the class
536 if `MASK & (1 << R)' is 1.
538 When the machine has more than 32 registers, an integer does not suffice.
539 Then the integers are replaced by sub-initializers, braced groupings
540 containing several integers. Each sub-initializer must be suitable as an
541 initializer for the type `HARD_REG_SET' which is defined in
543 #define REG_CLASS_CONTENTS \
546 { 1 << MD_LOW_REGNUM }, \
547 { (1 << MD_LOW_REGNUM) | (1 << MD_HIGH_REGNUM) }, \
549 { ((1 << 8) - 1) << 8 }, \
550 { (1 << CONDITION_CODE_REGNUM) - 1 }, \
551 { (1 << FIRST_PSEUDO_REGISTER) - 1 } \
554 /* A C expression whose value is a register class containing hard register
555 REGNO. In general there is more than one such class; choose a class which
556 is "minimal", meaning that no smaller class also contains the register. */
557 #define REGNO_REG_CLASS(REGNO) \
558 ( (REGNO) < 8 ? LOW_REGS \
559 : (REGNO) < CONDITION_CODE_REGNUM ? HIGH_REGS \
560 : (REGNO) == MD_LOW_REGNUM ? MULTIPLY_32_REG \
561 : (REGNO) == MD_HIGH_REGNUM ? MULTIPLY_64_REG \
564 /* A macro whose definition is the name of the class to which a valid base
565 register must belong. A base register is one used in an address which is
566 the register value plus a displacement. */
567 #define BASE_REG_CLASS REAL_REGS
569 /* A macro whose definition is the name of the class to which a valid index
570 register must belong. An index register is one used in an address where its
571 value is either multiplied by a scale factor or added to another register
572 (as well as added to a displacement). */
573 #define INDEX_REG_CLASS REAL_REGS
575 /* A C expression which defines the machine-dependent operand constraint
576 letters for register classes. If CHAR is such a letter, the value should be
577 the register class corresponding to it. Otherwise, the value should be
578 `NO_REGS'. The register letter `r', corresponding to class `GENERAL_REGS',
579 will not be passed to this macro; you do not need to handle it.
581 The following letters are unavailable, due to being used as
586 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P'
587 'Q', 'R', 'S', 'T', 'U'
589 'g', 'i', 'm', 'n', 'o', 'p', 'r', 's' */
591 #define REG_CLASS_FROM_LETTER(CHAR) \
592 ( (CHAR) == 'd' ? MULTIPLY_64_REG \
593 : (CHAR) == 'e' ? MULTIPLY_32_REG \
594 : (CHAR) == 'h' ? HIGH_REGS \
595 : (CHAR) == 'l' ? LOW_REGS \
596 : (CHAR) == 'a' ? ALL_REGS \
599 /* A C expression which is nonzero if register number NUM is suitable for use
600 as a base register in operand addresses. It may be either a suitable hard
601 register or a pseudo register that has been allocated such a hard register. */
602 #define REGNO_OK_FOR_BASE_P(NUM) 1
604 /* A C expression which is nonzero if register number NUM is suitable for use
605 as an index register in operand addresses. It may be either a suitable hard
606 register or a pseudo register that has been allocated such a hard register.
608 The difference between an index register and a base register is that the
609 index register may be scaled. If an address involves the sum of two
610 registers, neither one of them scaled, then either one may be labeled the
611 "base" and the other the "index"; but whichever labeling is used must fit
612 the machine's constraints of which registers may serve in each capacity.
613 The compiler will try both labelings, looking for one that is valid, and
614 will reload one or both registers only if neither labeling works. */
615 #define REGNO_OK_FOR_INDEX_P(NUM) 1
617 /* A C expression that places additional restrictions on the register class to
618 use when it is necessary to copy value X into a register in class CLASS.
619 The value is a register class; perhaps CLASS, or perhaps another, smaller
620 class. On many machines, the following definition is safe:
622 #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS
624 Sometimes returning a more restrictive class makes better code. For
625 example, on the 68000, when X is an integer constant that is in range for a
626 `moveq' instruction, the value of this macro is always `DATA_REGS' as long
627 as CLASS includes the data registers. Requiring a data register guarantees
628 that a `moveq' will be used.
630 If X is a `const_double', by returning `NO_REGS' you can force X into a
631 memory constant. This is useful on certain machines where immediate
632 floating values cannot be loaded into certain kinds of registers. */
633 #define PREFERRED_RELOAD_CLASS(X, CLASS) CLASS
635 /* A C expression for the maximum number of consecutive registers of
636 class CLASS needed to hold a value of mode MODE.
638 This is closely related to the macro `HARD_REGNO_NREGS'. In fact, the value
639 of the macro `CLASS_MAX_NREGS (CLASS, MODE)' should be the maximum value of
640 `HARD_REGNO_NREGS (REGNO, MODE)' for all REGNO values in the class CLASS.
642 This macro helps control the handling of multiple-word values in
644 #define CLASS_MAX_NREGS(CLASS, MODE) HARD_REGNO_NREGS (0, MODE)
649 /* Return true if a value is inside a range */
650 #define IN_RANGE(VALUE, LOW, HIGH) \
651 ( ((unsigned HOST_WIDE_INT)((VALUE) - (LOW))) \
652 <= ((unsigned HOST_WIDE_INT)( (HIGH) - (LOW))))
654 /* A C expression that defines the machine-dependent operand constraint letters
655 (`I', `J', `K', .. 'P') that specify particular ranges of integer values.
656 If C is one of those letters, the expression should check that VALUE, an
657 integer, is in the appropriate range and return 1 if so, 0 otherwise. If C
658 is not one of those letters, the value should be 0 regardless of VALUE. */
659 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
660 ( (C) == 'I' ? IN_RANGE (VALUE, 0, 15) \
661 : (C) == 'J' ? IN_RANGE (VALUE, -16, -1) \
662 : (C) == 'K' ? IN_RANGE (VALUE, 16, 31) \
663 : (C) == 'L' ? IN_RANGE (VALUE, 0, (1 << 8) - 1) \
664 : (C) == 'M' ? IN_RANGE (VALUE, 0, (1 << 20) - 1) \
665 : (C) == 'P' ? IN_RANGE (VALUE, -(1 << 8), (1 << 8) - 1) \
668 /* A C expression that defines the machine-dependent operand constraint letters
669 (`G', `H') that specify particular ranges of `const_double' values.
671 If C is one of those letters, the expression should check that VALUE, an RTX
672 of code `const_double', is in the appropriate range and return 1 if so, 0
673 otherwise. If C is not one of those letters, the value should be 0
676 `const_double' is used for all floating-point constants and for `DImode'
677 fixed-point constants. A given letter can accept either or both kinds of
678 values. It can use `GET_MODE' to distinguish between these kinds. */
679 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) 0
681 /* A C expression that defines the optional machine-dependent constraint
682 letters (`Q', `R', `S', `T', `U') that can be used to segregate specific
683 types of operands, usually memory references, for the target machine.
684 Normally this macro will not be defined. If it is required for a particular
685 target machine, it should return 1 if VALUE corresponds to the operand type
686 represented by the constraint letter C. If C is not defined as an extra
687 constraint, the value returned should be 0 regardless of VALUE.
689 For example, on the ROMP, load instructions cannot have their output in r0
690 if the memory reference contains a symbolic address. Constraint letter `Q'
691 is defined as representing a memory address that does *not* contain a
692 symbolic address. An alternative is specified with a `Q' constraint on the
693 input and `r' on the output. The next alternative specifies `m' on the
694 input and a register class that does not include r0 on the output. */
695 #define EXTRA_CONSTRAINT(VALUE, C) \
696 ((C) == 'Q' ? (GET_CODE (VALUE) == MEM && GET_CODE (XEXP (VALUE, 0)) == SYMBOL_REF) : 0)
699 /*{{{ Basic Stack Layout. */
701 /* Define this macro if pushing a word onto the stack moves the stack pointer
702 to a smaller address. */
703 #define STACK_GROWS_DOWNWARD 1
705 /* Define this macro if the addresses of local variable slots are at negative
706 offsets from the frame pointer. */
707 #define FRAME_GROWS_DOWNWARD 1
709 /* Offset from the frame pointer to the first local variable slot to be
712 If `FRAME_GROWS_DOWNWARD', find the next slot's offset by subtracting the
713 first slot's length from `STARTING_FRAME_OFFSET'. Otherwise, it is found by
714 adding the length of the first slot to the value `STARTING_FRAME_OFFSET'. */
715 /* #define STARTING_FRAME_OFFSET -4 */
716 #define STARTING_FRAME_OFFSET 0
718 /* Offset from the stack pointer register to the first location at which
719 outgoing arguments are placed. If not specified, the default value of zero
720 is used. This is the proper value for most machines.
722 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
723 location at which outgoing arguments are placed. */
724 #define STACK_POINTER_OFFSET 0
726 /* Offset from the argument pointer register to the first argument's address.
727 On some machines it may depend on the data type of the function.
729 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
730 argument's address. */
731 #define FIRST_PARM_OFFSET(FUNDECL) 0
733 /* A C expression whose value is RTL representing the location of the incoming
734 return address at the beginning of any function, before the prologue. This
735 RTL is either a `REG', indicating that the return value is saved in `REG',
736 or a `MEM' representing a location in the stack.
738 You only need to define this macro if you want to support call frame
739 debugging information like that provided by DWARF 2. */
740 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (SImode, RETURN_POINTER_REGNUM)
743 /*{{{ Register That Address the Stack Frame. */
745 /* The register number of the arg pointer register, which is used to access the
746 function's argument list. On some machines, this is the same as the frame
747 pointer register. On some machines, the hardware determines which register
748 this is. On other machines, you can choose any register you wish for this
749 purpose. If this is not the same register as the frame pointer register,
750 then you must mark it as a fixed register according to `FIXED_REGISTERS', or
751 arrange to be able to eliminate it. */
752 #define ARG_POINTER_REGNUM 20
755 /*{{{ Eliminating the Frame Pointer and the Arg Pointer. */
757 /* A C expression which is nonzero if a function must have and use a frame
758 pointer. This expression is evaluated in the reload pass. If its value is
759 nonzero the function will have a frame pointer.
761 The expression can in principle examine the current function and decide
762 according to the facts, but on most machines the constant 0 or the constant
763 1 suffices. Use 0 when the machine allows code to be generated with no
764 frame pointer, and doing so saves some time or space. Use 1 when there is
765 no possible advantage to avoiding a frame pointer.
767 In certain cases, the compiler does not know how to produce valid code
768 without a frame pointer. The compiler recognizes those cases and
769 automatically gives the function a frame pointer regardless of what
770 `FRAME_POINTER_REQUIRED' says. You don't need to worry about them.
772 In a function that does not require a frame pointer, the frame pointer
773 register can be allocated for ordinary usage, unless you mark it as a fixed
774 register. See `FIXED_REGISTERS' for more information. */
775 /* #define FRAME_POINTER_REQUIRED 0 */
776 #define FRAME_POINTER_REQUIRED \
777 (flag_omit_frame_pointer == 0 || current_function_pretend_args_size > 0)
779 /* If defined, this macro specifies a table of register pairs used to eliminate
780 unneeded registers that point into the stack frame. If it is not defined,
781 the only elimination attempted by the compiler is to replace references to
782 the frame pointer with references to the stack pointer.
784 The definition of this macro is a list of structure initializations, each of
785 which specifies an original and replacement register.
787 On some machines, the position of the argument pointer is not known until
788 the compilation is completed. In such a case, a separate hard register must
789 be used for the argument pointer. This register can be eliminated by
790 replacing it with either the frame pointer or the argument pointer,
791 depending on whether or not the frame pointer has been eliminated.
793 In this case, you might specify:
794 #define ELIMINABLE_REGS \
795 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
796 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
797 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
799 Note that the elimination of the argument pointer with the stack pointer is
800 specified first since that is the preferred elimination. */
802 #define ELIMINABLE_REGS \
804 {ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
805 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
806 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM} \
809 /* A C expression that returns non-zero if the compiler is allowed to try to
810 replace register number FROM with register number TO. This macro
811 need only be defined if `ELIMINABLE_REGS' is defined, and will usually be
812 the constant 1, since most of the cases preventing register elimination are
813 things that the compiler already knows about. */
815 #define CAN_ELIMINATE(FROM, TO) \
816 ((TO) == FRAME_POINTER_REGNUM || ! frame_pointer_needed)
818 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It specifies the
819 initial difference between the specified pair of registers. This macro must
820 be defined if `ELIMINABLE_REGS' is defined. */
821 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
822 (OFFSET) = fr30_compute_frame_size (FROM, TO)
825 /*{{{ Passing Function Arguments on the Stack. */
827 /* Define this macro if an argument declared in a prototype as an integral type
828 smaller than `int' should actually be passed as an `int'. In addition to
829 avoiding errors in certain cases of mismatch, it also makes for better code
830 on certain machines. */
831 #define PROMOTE_PROTOTYPES 1
833 /* If defined, the maximum amount of space required for outgoing arguments will
834 be computed and placed into the variable
835 `current_function_outgoing_args_size'. No space will be pushed onto the
836 stack for each call; instead, the function prologue should increase the
837 stack frame size by this amount.
839 Defining both `PUSH_ROUNDING' and `ACCUMULATE_OUTGOING_ARGS' is not
841 #define ACCUMULATE_OUTGOING_ARGS 1
843 /* A C expression that should indicate the number of bytes of its own arguments
844 that a function pops on returning, or 0 if the function pops no arguments
845 and the caller must therefore pop them all after the function returns.
847 FUNDECL is a C variable whose value is a tree node that describes the
848 function in question. Normally it is a node of type `FUNCTION_DECL' that
849 describes the declaration of the function. From this it is possible to
850 obtain the DECL_MACHINE_ATTRIBUTES of the function.
852 FUNTYPE is a C variable whose value is a tree node that describes the
853 function in question. Normally it is a node of type `FUNCTION_TYPE' that
854 describes the data type of the function. From this it is possible to obtain
855 the data types of the value and arguments (if known).
857 When a call to a library function is being considered, FUNTYPE will contain
858 an identifier node for the library function. Thus, if you need to
859 distinguish among various library functions, you can do so by their names.
860 Note that "library function" in this context means a function used to
861 perform arithmetic, whose name is known specially in the compiler and was
862 not mentioned in the C code being compiled.
864 STACK-SIZE is the number of bytes of arguments passed on the stack. If a
865 variable number of bytes is passed, it is zero, and argument popping will
866 always be the responsibility of the calling function.
868 On the Vax, all functions always pop their arguments, so the definition of
869 this macro is STACK-SIZE. On the 68000, using the standard calling
870 convention, no functions pop their arguments, so the value of the macro is
871 always 0 in this case. But an alternative calling convention is available
872 in which functions that take a fixed number of arguments pop them but other
873 functions (such as `printf') pop nothing (the caller pops all). When this
874 convention is in use, FUNTYPE is examined to determine whether a function
875 takes a fixed number of arguments. */
876 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
878 /* Implement `va_arg'. */
879 #define EXPAND_BUILTIN_VA_ARG(valist, type) \
880 fr30_va_arg (valist, type)
883 /*{{{ Function Arguments in Registers. */
885 /* Nonzero if we do not know how to pass TYPE solely in registers.
886 We cannot do so in the following cases:
888 - if the type has variable size
889 - if the type is marked as addressable (it is required to be constructed
891 - if the type is a structure or union. */
893 #define MUST_PASS_IN_STACK(MODE, TYPE) \
894 (((MODE) == BLKmode) \
896 && TYPE_SIZE (TYPE) != NULL \
897 && (TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST \
898 || TREE_CODE (TYPE) == RECORD_TYPE \
899 || TREE_CODE (TYPE) == UNION_TYPE \
900 || TREE_CODE (TYPE) == QUAL_UNION_TYPE \
901 || TREE_ADDRESSABLE (TYPE))))
903 /* The number of register assigned to holding function arguments. */
905 #define FR30_NUM_ARG_REGS 4
907 /* A C expression that controls whether a function argument is passed in a
908 register, and which register.
910 The usual way to make the ANSI library `stdarg.h' work on a machine where
911 some arguments are usually passed in registers, is to cause nameless
912 arguments to be passed on the stack instead. This is done by making
913 `FUNCTION_ARG' return 0 whenever NAMED is 0.
915 You may use the macro `MUST_PASS_IN_STACK (MODE, TYPE)' in the definition of
916 this macro to determine if this argument is of a type that must be passed in
917 the stack. If `REG_PARM_STACK_SPACE' is not defined and `FUNCTION_ARG'
918 returns non-zero for such an argument, the compiler will abort. If
919 `REG_PARM_STACK_SPACE' is defined, the argument will be computed in the
920 stack and then loaded into a register. */
922 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
923 ( (NAMED) == 0 ? NULL_RTX \
924 : MUST_PASS_IN_STACK (MODE, TYPE) ? NULL_RTX \
925 : (CUM) >= FR30_NUM_ARG_REGS ? NULL_RTX \
926 : gen_rtx (REG, MODE, CUM + FIRST_ARG_REGNUM))
928 /* A C type for declaring a variable that is used as the first argument of
929 `FUNCTION_ARG' and other related values. For some target machines, the type
930 `int' suffices and can hold the number of bytes of argument so far.
932 There is no need to record in `CUMULATIVE_ARGS' anything about the arguments
933 that have been passed on the stack. The compiler has other variables to
934 keep track of that. For target machines on which all arguments are passed
935 on the stack, there is no need to store anything in `CUMULATIVE_ARGS';
936 however, the data structure must exist and should not be empty, so use
938 /* On the FR30 this value is an accumulating count of the number of argument
939 registers that have been filled with argument values, as opposed to say,
940 the number of bytes of argument accumulated so far. */
941 typedef int CUMULATIVE_ARGS;
943 /* A C expression for the number of words, at the beginning of an argument,
944 must be put in registers. The value must be zero for arguments that are
945 passed entirely in registers or that are entirely pushed on the stack.
947 On some machines, certain arguments must be passed partially in registers
948 and partially in memory. On these machines, typically the first N words of
949 arguments are passed in registers, and the rest on the stack. If a
950 multi-word argument (a `double' or a structure) crosses that boundary, its
951 first few words must be passed in registers and the rest must be pushed.
952 This macro tells the compiler when this occurs, and how many of the words
953 should go in registers.
955 `FUNCTION_ARG' for these arguments should return the first register to be
956 used by the caller for this argument; likewise `FUNCTION_INCOMING_ARG', for
957 the called function. */
958 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
959 fr30_function_arg_partial_nregs (CUM, MODE, TYPE, NAMED)
961 /* A C expression that indicates when an argument must be passed by reference.
962 If nonzero for an argument, a copy of that argument is made in memory and a
963 pointer to the argument is passed instead of the argument itself. The
964 pointer is passed in whatever way is appropriate for passing a pointer to
967 On machines where `REG_PARM_STACK_SPACE' is not defined, a suitable
968 definition of this macro might be:
969 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
970 MUST_PASS_IN_STACK (MODE, TYPE) */
971 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
972 MUST_PASS_IN_STACK (MODE, TYPE)
974 /* A C statement (sans semicolon) for initializing the variable CUM for the
975 state at the beginning of the argument list. The variable has type
976 `CUMULATIVE_ARGS'. The value of FNTYPE is the tree node for the data type
977 of the function which will receive the args, or 0 if the args are to a
978 compiler support library function. The value of INDIRECT is nonzero when
979 processing an indirect call, for example a call through a function pointer.
980 The value of INDIRECT is zero for a call to an explicitly named function, a
981 library function call, or when `INIT_CUMULATIVE_ARGS' is used to find
982 arguments for the function being compiled.
984 When processing a call to a compiler support library function, LIBNAME
985 identifies which one. It is a `symbol_ref' rtx which contains the name of
986 the function, as a string. LIBNAME is 0 when an ordinary C function call is
987 being processed. Thus, each time this macro is called, either LIBNAME or
988 FNTYPE is nonzero, but never both of them at once. */
989 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) (CUM) = 0
991 /* A C statement (sans semicolon) to update the summarizer variable CUM to
992 advance past an argument in the argument list. The values MODE, TYPE and
993 NAMED describe that argument. Once this is done, the variable CUM is
994 suitable for analyzing the *following* argument with `FUNCTION_ARG', etc.
996 This macro need not do anything if the argument in question was passed on
997 the stack. The compiler knows how to track the amount of stack space used
998 for arguments without any special help. */
999 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
1000 (CUM) += (NAMED) * fr30_num_arg_regs (MODE, TYPE)
1002 /* A C expression that is nonzero if REGNO is the number of a hard register in
1003 which function arguments are sometimes passed. This does *not* include
1004 implicit arguments such as the static chain and the structure-value address.
1005 On many machines, no registers can be used for this purpose since all
1006 function arguments are pushed on the stack. */
1007 #define FUNCTION_ARG_REGNO_P(REGNO) \
1008 ((REGNO) >= FIRST_ARG_REGNUM && ((REGNO) < FIRST_ARG_REGNUM + FR30_NUM_ARG_REGS))
1011 /*{{{ How Scalar Function Values are Returned. */
1013 /* A C expression to create an RTX representing the place where a function
1014 returns a value of data type VALTYPE. VALTYPE is a tree node representing a
1015 data type. Write `TYPE_MODE (VALTYPE)' to get the machine mode used to
1016 represent that type. On many machines, only the mode is relevant.
1017 (Actually, on most machines, scalar values are returned in the same place
1018 regardless of mode).
1020 If `PROMOTE_FUNCTION_RETURN' is defined, you must apply the same promotion
1021 rules specified in `PROMOTE_MODE' if VALTYPE is a scalar type.
1023 If the precise function being called is known, FUNC is a tree node
1024 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This makes it
1025 possible to use a different value-returning convention for specific
1026 functions when all their calls are known.
1028 `FUNCTION_VALUE' is not used for return vales with aggregate data types,
1029 because these are returned in another way. See `STRUCT_VALUE_REGNUM' and
1030 related macros, below. */
1031 #define FUNCTION_VALUE(VALTYPE, FUNC) \
1032 gen_rtx_REG (TYPE_MODE (VALTYPE), RETURN_VALUE_REGNUM)
1034 /* A C expression to create an RTX representing the place where a library
1035 function returns a value of mode MODE. If the precise function being called
1036 is known, FUNC is a tree node (`FUNCTION_DECL') for it; otherwise, FUNC is a
1037 null pointer. This makes it possible to use a different value-returning
1038 convention for specific functions when all their calls are known.
1040 Note that "library function" in this context means a compiler support
1041 routine, used to perform arithmetic, whose name is known specially by the
1042 compiler and was not mentioned in the C code being compiled.
1044 The definition of `LIBRARY_VALUE' need not be concerned aggregate data
1045 types, because none of the library functions returns such types. */
1046 #define LIBCALL_VALUE(MODE) gen_rtx (REG, MODE, RETURN_VALUE_REGNUM)
1048 /* A C expression that is nonzero if REGNO is the number of a hard register in
1049 which the values of called function may come back. */
1051 #define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == RETURN_VALUE_REGNUM)
1054 /*{{{ How Large Values are Returned. */
1056 /* Define this macro to be 1 if all structure and union return values must be
1057 in memory. Since this results in slower code, this should be defined only
1058 if needed for compatibility with other compilers or with an ABI. If you
1059 define this macro to be 0, then the conventions used for structure and union
1060 return values are decided by the `RETURN_IN_MEMORY' macro.
1062 If not defined, this defaults to the value 1. */
1063 #define DEFAULT_PCC_STRUCT_RETURN 1
1065 /* If the structure value address is not passed in a register, define
1066 `STRUCT_VALUE' as an expression returning an RTX for the place where the
1067 address is passed. If it returns 0, the address is passed as an "invisible"
1069 #define STRUCT_VALUE 0
1072 /*{{{ Generating Code for Profiling. */
1074 /* A C statement or compound statement to output to FILE some assembler code to
1075 call the profiling subroutine `mcount'. Before calling, the assembler code
1076 must load the address of a counter variable into a register where `mcount'
1077 expects to find the address. The name of this variable is `LP' followed by
1078 the number LABELNO, so you would generate the name using `LP%d' in a
1081 The details of how the address should be passed to `mcount' are determined
1082 by your operating system environment, not by GNU CC. To figure them out,
1083 compile a small program for profiling using the system's installed C
1084 compiler and look at the assembler code that results. */
1085 #define FUNCTION_PROFILER(FILE, LABELNO) \
1087 fprintf (FILE, "\t mov rp, r1\n" ); \
1088 fprintf (FILE, "\t ldi:32 mcount, r0\n" ); \
1089 fprintf (FILE, "\t call @r0\n" ); \
1090 fprintf (FILE, ".word\tLP%d\n", LABELNO); \
1094 /*{{{ Implementing the VARARGS Macros. */
1096 /* This macro offers an alternative to using `__builtin_saveregs' and defining
1097 the macro `EXPAND_BUILTIN_SAVEREGS'. Use it to store the anonymous register
1098 arguments into the stack so that all the arguments appear to have been
1099 passed consecutively on the stack. Once this is done, you can use the
1100 standard implementation of varargs that works for machines that pass all
1101 their arguments on the stack.
1103 The argument ARGS_SO_FAR is the `CUMULATIVE_ARGS' data structure, containing
1104 the values that obtain after processing of the named arguments. The
1105 arguments MODE and TYPE describe the last named argument--its machine mode
1106 and its data type as a tree node.
1108 The macro implementation should do two things: first, push onto the stack
1109 all the argument registers *not* used for the named arguments, and second,
1110 store the size of the data thus pushed into the `int'-valued variable whose
1111 name is supplied as the argument PRETEND_ARGS_SIZE. The value that you
1112 store here will serve as additional offset for setting up the stack frame.
1114 Because you must generate code to push the anonymous arguments at compile
1115 time without knowing their data types, `SETUP_INCOMING_VARARGS' is only
1116 useful on machines that have just a single category of argument register and
1117 use it uniformly for all data types.
1119 If the argument SECOND_TIME is nonzero, it means that the arguments of the
1120 function are being analyzed for the second time. This happens for an inline
1121 function, which is not actually compiled until the end of the source file.
1122 The macro `SETUP_INCOMING_VARARGS' should not generate any instructions in
1124 #define SETUP_INCOMING_VARARGS(ARGS_SO_FAR, MODE, TYPE, PRETEND_ARGS_SIZE, SECOND_TIME) \
1125 if (! SECOND_TIME) \
1126 fr30_setup_incoming_varargs (ARGS_SO_FAR, MODE, TYPE, & PRETEND_ARGS_SIZE)
1128 /* Define this macro if the location where a function argument is passed
1129 depends on whether or not it is a named argument.
1131 This macro controls how the NAMED argument to `FUNCTION_ARG' is set for
1132 varargs and stdarg functions. With this macro defined, the NAMED argument
1133 is always true for named arguments, and false for unnamed arguments. If
1134 this is not defined, but `SETUP_INCOMING_VARARGS' is defined, then all
1135 arguments are treated as named. Otherwise, all named arguments except the
1136 last are treated as named. */
1137 #define STRICT_ARGUMENT_NAMING 0
1140 /*{{{ Trampolines for Nested Functions. */
1142 /* On the FR30, the trampoline is:
1150 The no-ops are to guarantee that the the static chain and final
1151 target are 32 bit ailgned within the trampoline. That allows us to
1152 initialize those locations with simple SImode stores. The alternative
1153 would be to use HImode stores. */
1155 /* A C statement to output, on the stream FILE, assembler code for a block of
1156 data that contains the constant parts of a trampoline. This code should not
1157 include a label--the label is taken care of automatically. */
1158 #define TRAMPOLINE_TEMPLATE(FILE) \
1160 fprintf (FILE, "\tnop\n"); \
1161 fprintf (FILE, "\tldi:32\t#0, %s\n", reg_names [STATIC_CHAIN_REGNUM]); \
1162 fprintf (FILE, "\tnop\n"); \
1163 fprintf (FILE, "\tldi:32\t#0, %s\n", reg_names [COMPILER_SCRATCH_REGISTER]); \
1164 fprintf (FILE, "\tjmp\t@%s\n", reg_names [COMPILER_SCRATCH_REGISTER]); \
1167 /* A C expression for the size in bytes of the trampoline, as an integer. */
1168 #define TRAMPOLINE_SIZE 18
1170 /* We want the trampoline to be aligned on a 32bit boundary so that we can
1171 make sure the location of the static chain & target function within
1172 the trampoline is also aligned on a 32bit boundary. */
1173 #define TRAMPOLINE_ALIGNMENT 32
1175 /* A C statement to initialize the variable parts of a trampoline. ADDR is an
1176 RTX for the address of the trampoline; FNADDR is an RTX for the address of
1177 the nested function; STATIC_CHAIN is an RTX for the static chain value that
1178 should be passed to the function when it is called. */
1179 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \
1182 emit_move_insn (gen_rtx (MEM, SImode, plus_constant (ADDR, 4)), STATIC_CHAIN);\
1183 emit_move_insn (gen_rtx (MEM, SImode, plus_constant (ADDR, 12)), FNADDR); \
1187 /*{{{ Addressing Modes. */
1189 /* A C expression that is 1 if the RTX X is a constant which is a valid
1190 address. On most machines, this can be defined as `CONSTANT_P (X)', but a
1191 few machines are more restrictive in which constant addresses are supported.
1193 `CONSTANT_P' accepts integer-values expressions whose values are not
1194 explicitly known, such as `symbol_ref', `label_ref', and `high' expressions
1195 and `const' arithmetic expressions, in addition to `const_int' and
1196 `const_double' expressions. */
1197 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
1199 /* A number, the maximum number of registers that can appear in a valid memory
1200 address. Note that it is up to you to specify a value equal to the maximum
1201 number that `GO_IF_LEGITIMATE_ADDRESS' would ever accept. */
1202 #define MAX_REGS_PER_ADDRESS 1
1204 /* A C compound statement with a conditional `goto LABEL;' executed if X (an
1205 RTX) is a legitimate memory address on the target machine for a memory
1206 operand of mode MODE.
1208 It usually pays to define several simpler macros to serve as subroutines for
1209 this one. Otherwise it may be too complicated to understand.
1211 This macro must exist in two variants: a strict variant and a non-strict
1212 one. The strict variant is used in the reload pass. It must be defined so
1213 that any pseudo-register that has not been allocated a hard register is
1214 considered a memory reference. In contexts where some kind of register is
1215 required, a pseudo-register with no hard register must be rejected.
1217 The non-strict variant is used in other passes. It must be defined to
1218 accept all pseudo-registers in every context where some kind of register is
1221 Compiler source files that want to use the strict variant of this macro
1222 define the macro `REG_OK_STRICT'. You should use an `#ifdef REG_OK_STRICT'
1223 conditional to define the strict variant in that case and the non-strict
1226 Subroutines to check for acceptable registers for various purposes (one for
1227 base registers, one for index registers, and so on) are typically among the
1228 subroutines used to define `GO_IF_LEGITIMATE_ADDRESS'. Then only these
1229 subroutine macros need have two variants; the higher levels of macros may be
1230 the same whether strict or not.
1232 Normally, constant addresses which are the sum of a `symbol_ref' and an
1233 integer are stored inside a `const' RTX to mark them as constant.
1234 Therefore, there is no need to recognize such sums specifically as
1235 legitimate addresses. Normally you would simply recognize any `const' as
1238 Usually `PRINT_OPERAND_ADDRESS' is not prepared to handle constant sums that
1239 are not marked with `const'. It assumes that a naked `plus' indicates
1240 indexing. If so, then you *must* reject such naked constant sums as
1241 illegitimate addresses, so that none of them will be given to
1242 `PRINT_OPERAND_ADDRESS'.
1244 On some machines, whether a symbolic address is legitimate depends on the
1245 section that the address refers to. On these machines, define the macro
1246 `ENCODE_SECTION_INFO' to store the information into the `symbol_ref', and
1247 then check for it here. When you see a `const', you will have to look
1248 inside it to find the `symbol_ref' in order to determine the section.
1250 The best way to modify the name string is by adding text to the beginning,
1251 with suitable punctuation to prevent any ambiguity. Allocate the new name
1252 in `saveable_obstack'. You will have to modify `ASM_OUTPUT_LABELREF' to
1253 remove and decode the added text and output the name accordingly, and define
1254 `STRIP_NAME_ENCODING' to access the original name string.
1256 You can check the information stored here into the `symbol_ref' in the
1257 definitions of the macros `GO_IF_LEGITIMATE_ADDRESS' and
1258 `PRINT_OPERAND_ADDRESS'.
1260 Used in explow.c, recog.c, reload.c. */
1262 /* On the FR30 we only have one real addressing mode - an address in a
1263 register. There are three special cases however:
1265 * indexed addressing using small positive offsets from the stack pointer
1267 * indexed addressing using small signed offsets from the frame pointer
1269 * register plus register addresing using R13 as the base register.
1271 At the moment we only support the first two of these special cases. */
1273 #ifdef REG_OK_STRICT
1274 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
1277 if (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X)) \
1279 if (GET_CODE (X) == PLUS \
1280 && ((MODE) == SImode || (MODE) == SFmode) \
1281 && XEXP (X, 0) == stack_pointer_rtx \
1282 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1283 && IN_RANGE (INTVAL (XEXP (X, 1)), 0, (1 << 6) - 4)) \
1285 if (GET_CODE (X) == PLUS \
1286 && ((MODE) == SImode || (MODE) == SFmode) \
1287 && XEXP (X, 0) == frame_pointer_rtx \
1288 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1289 && IN_RANGE (INTVAL (XEXP (X, 1)), -(1 << 9), (1 << 9) - 4)) \
1294 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
1297 if (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X)) \
1299 if (GET_CODE (X) == PLUS \
1300 && ((MODE) == SImode || (MODE) == SFmode) \
1301 && XEXP (X, 0) == stack_pointer_rtx \
1302 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1303 && IN_RANGE (INTVAL (XEXP (X, 1)), 0, (1 << 6) - 4)) \
1305 if (GET_CODE (X) == PLUS \
1306 && ((MODE) == SImode || (MODE) == SFmode) \
1307 && (XEXP (X, 0) == frame_pointer_rtx \
1308 || XEXP(X,0) == arg_pointer_rtx) \
1309 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1310 && IN_RANGE (INTVAL (XEXP (X, 1)), -(1 << 9), (1 << 9) - 4)) \
1316 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
1317 use as a base register. For hard registers, it should always accept those
1318 which the hardware permits and reject the others. Whether the macro accepts
1319 or rejects pseudo registers must be controlled by `REG_OK_STRICT' as
1320 described above. This usually requires two variant definitions, of which
1321 `REG_OK_STRICT' controls the one actually used. */
1322 #ifdef REG_OK_STRICT
1323 #define REG_OK_FOR_BASE_P(X) (((unsigned) REGNO (X)) <= STACK_POINTER_REGNUM)
1325 #define REG_OK_FOR_BASE_P(X) 1
1328 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
1329 use as an index register.
1331 The difference between an index register and a base register is that the
1332 index register may be scaled. If an address involves the sum of two
1333 registers, neither one of them scaled, then either one may be labeled the
1334 "base" and the other the "index"; but whichever labeling is used must fit
1335 the machine's constraints of which registers may serve in each capacity.
1336 The compiler will try both labelings, looking for one that is valid, and
1337 will reload one or both registers only if neither labeling works. */
1338 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
1340 /* A C compound statement that attempts to replace X with a valid memory
1341 address for an operand of mode MODE. WIN will be a C statement label
1342 elsewhere in the code; the macro definition may use
1344 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN);
1346 to avoid further processing if the address has become legitimate.
1348 X will always be the result of a call to `break_out_memory_refs', and OLDX
1349 will be the operand that was given to that function to produce X.
1351 The code generated by this macro should not alter the substructure of X. If
1352 it transforms X into a more legitimate form, it should assign X (which will
1353 always be a C variable) a new value.
1355 It is not necessary for this macro to come up with a legitimate address.
1356 The compiler has standard ways of doing so in all cases. In fact, it is
1357 safe for this macro to do nothing. But often a machine-dependent strategy
1358 can generate better code. */
1359 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)
1361 /* A C statement or compound statement with a conditional `goto LABEL;'
1362 executed if memory address X (an RTX) can have different meanings depending
1363 on the machine mode of the memory reference it is used for or if the address
1364 is valid for some modes but not others.
1366 Autoincrement and autodecrement addresses typically have mode-dependent
1367 effects because the amount of the increment or decrement is the size of the
1368 operand being addressed. Some machines have other mode-dependent addresses.
1369 Many RISC machines have no mode-dependent addresses.
1371 You may assume that ADDR is a valid address for the machine. */
1372 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL)
1374 /* A C expression that is nonzero if X is a legitimate constant for an
1375 immediate operand on the target machine. You can assume that X satisfies
1376 `CONSTANT_P', so you need not check this. In fact, `1' is a suitable
1377 definition for this macro on machines where anything `CONSTANT_P' is valid. */
1378 #define LEGITIMATE_CONSTANT_P(X) 1
1381 /*{{{ Describing Relative Costs of Operations */
1383 /* Define this macro as a C expression which is nonzero if accessing less than
1384 a word of memory (i.e. a `char' or a `short') is no faster than accessing a
1385 word of memory, i.e., if such access require more than one instruction or if
1386 there is no difference in cost between byte and (aligned) word loads.
1388 When this macro is not defined, the compiler will access a field by finding
1389 the smallest containing object; when it is defined, a fullword load will be
1390 used if alignment permits. Unless bytes accesses are faster than word
1391 accesses, using word accesses is preferable since it may eliminate
1392 subsequent memory access if subsequent accesses occur to other fields in the
1393 same word of the structure, but to different bytes. */
1394 #define SLOW_BYTE_ACCESS 1
1396 /* Define this macro if zero-extension (of a `char' or `short' to an `int') can
1397 be done faster if the destination is a register that is known to be zero.
1399 If you define this macro, you must have instruction patterns that recognize
1400 RTL structures like this:
1402 (set (strict_low_part (subreg:QI (reg:SI ...) 0)) ...)
1404 and likewise for `HImode'. */
1405 #define SLOW_ZERO_EXTEND 0
1408 /*{{{ Dividing the output into sections. */
1410 /* A C expression whose value is a string containing the assembler operation
1411 that should precede instructions and read-only data. Normally `".text"' is
1413 #define TEXT_SECTION_ASM_OP ".text"
1415 /* A C expression whose value is a string containing the assembler operation to
1416 identify the following data as writable initialized data. Normally
1417 `".data"' is right. */
1418 #define DATA_SECTION_ASM_OP ".data"
1420 /* If defined, a C expression whose value is a string containing the
1421 assembler operation to identify the following data as
1422 uninitialized global data. If not defined, and neither
1423 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
1424 uninitialized global data will be output in the data section if
1425 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
1427 #define BSS_SECTION_ASM_OP ".bss"
1430 /*{{{ The Overall Framework of an Assembler File. */
1432 /* A C string constant describing how to begin a comment in the target
1433 assembler language. The compiler assumes that the comment will end at the
1435 #define ASM_COMMENT_START ";"
1437 /* A C string constant for text to be output before each `asm' statement or
1438 group of consecutive ones. Normally this is `"#APP"', which is a comment
1439 that has no effect on most assemblers but tells the GNU assembler that it
1440 must check the lines that follow for all valid assembler constructs. */
1441 #define ASM_APP_ON "#APP\n"
1443 /* A C string constant for text to be output after each `asm' statement or
1444 group of consecutive ones. Normally this is `"#NO_APP"', which tells the
1445 GNU assembler to resume making the time-saving assumptions that are valid
1446 for ordinary compiler output. */
1447 #define ASM_APP_OFF "#NO_APP\n"
1450 /*{{{ Output of Data. */
1452 /* This is how to output an assembler line defining a `float' constant. */
1453 #define ASM_OUTPUT_FLOAT(FILE, VALUE) \
1459 REAL_VALUE_TO_TARGET_SINGLE ((VALUE), t); \
1460 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", str); \
1462 fprintf (FILE, "\t.word\t0x%lx %s %s\n", \
1463 t, ASM_COMMENT_START, str); \
1467 /* This is how to output an assembler line defining a `double' constant. */
1468 #define ASM_OUTPUT_DOUBLE(FILE, VALUE) \
1474 REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), t); \
1475 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", str); \
1477 fprintf (FILE, "\t.word\t0x%lx %s %s\n\t.word\t0x%lx\n", \
1478 t[0], ASM_COMMENT_START, str, t[1]); \
1482 /* This is how to output an assembler line defining a `char' constant. */
1483 #define ASM_OUTPUT_CHAR(FILE, VALUE) \
1486 fprintf (FILE, "\t.byte\t"); \
1487 output_addr_const (FILE, (VALUE)); \
1488 fprintf (FILE, "\n"); \
1492 /* This is how to output an assembler line defining a `short' constant. */
1493 #define ASM_OUTPUT_SHORT(FILE, VALUE) \
1496 fprintf (FILE, "\t.hword\t"); \
1497 output_addr_const (FILE, (VALUE)); \
1498 fprintf (FILE, "\n"); \
1502 /* This is how to output an assembler line defining an `int' constant.
1503 We also handle symbol output here. */
1504 #define ASM_OUTPUT_INT(FILE, VALUE) \
1507 fprintf (FILE, "\t.word\t"); \
1508 output_addr_const (FILE, (VALUE)); \
1509 fprintf (FILE, "\n"); \
1513 /* A C statement to output to the stdio stream STREAM an assembler instruction
1514 to assemble a single byte containing the number VALUE. */
1515 #define ASM_OUTPUT_BYTE(STREAM, VALUE) \
1516 fprintf (STREAM, "\t%s\t0x%x\n", ASM_BYTE_OP, (VALUE))
1518 /* These macros are defined as C string constant, describing the syntax in the
1519 assembler for grouping arithmetic expressions. The following definitions
1520 are correct for most assemblers:
1522 #define ASM_OPEN_PAREN "("
1523 #define ASM_CLOSE_PAREN ")" */
1524 #define ASM_OPEN_PAREN "("
1525 #define ASM_CLOSE_PAREN ")"
1528 /*{{{ Output and Generation of Labels. */
1530 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
1531 assembler definition of a label named NAME. Use the expression
1532 `assemble_name (STREAM, NAME)' to output the name itself; before and after
1533 that, output the additional assembler syntax for defining the name, and a
1535 #define ASM_OUTPUT_LABEL(STREAM, NAME) \
1538 assemble_name (STREAM, NAME); \
1539 fputs (":\n", STREAM); \
1543 /* A C statement (sans semicolon) to output to the stdio stream STREAM some
1544 commands that will make the label NAME global; that is, available for
1545 reference from other files. Use the expression `assemble_name (STREAM,
1546 NAME)' to output the name itself; before and after that, output the
1547 additional assembler syntax for making that name global, and a newline. */
1548 #define ASM_GLOBALIZE_LABEL(STREAM,NAME) \
1551 fputs ("\t.globl ", STREAM); \
1552 assemble_name (STREAM, NAME); \
1553 fputs ("\n", STREAM); \
1557 /* A C expression to assign to OUTVAR (which is a variable of type `char *') a
1558 newly allocated string made from the string NAME and the number NUMBER, with
1559 some suitable punctuation added. Use `alloca' to get space for the string.
1561 The string will be used as an argument to `ASM_OUTPUT_LABELREF' to produce
1562 an assembler label for an internal static variable whose name is NAME.
1563 Therefore, the string must be such as to result in valid assembler code.
1564 The argument NUMBER is different each time this macro is executed; it
1565 prevents conflicts between similarly-named internal static variables in
1568 Ideally this string should not be a valid C identifier, to prevent any
1569 conflict with the user's own symbols. Most assemblers allow periods or
1570 percent signs in assembler symbols; putting at least one of these between
1571 the name and the number will suffice. */
1572 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR, NAME, NUMBER) \
1575 (OUTVAR) = (char *) alloca (strlen ((NAME)) + 12); \
1576 sprintf ((OUTVAR), "%s.%ld", (NAME), (long)(NUMBER)); \
1581 /*{{{ Output of Assembler Instructions. */
1583 /* A C compound statement to output to stdio stream STREAM the assembler syntax
1584 for an instruction operand X. X is an RTL expression.
1586 CODE is a value that can be used to specify one of several ways of printing
1587 the operand. It is used when identical operands must be printed differently
1588 depending on the context. CODE comes from the `%' specification that was
1589 used to request printing of the operand. If the specification was just
1590 `%DIGIT' then CODE is 0; if the specification was `%LTR DIGIT' then CODE is
1591 the ASCII code for LTR.
1593 If X is a register, this macro should print the register's name. The names
1594 can be found in an array `reg_names' whose type is `char *[]'. `reg_names'
1595 is initialized from `REGISTER_NAMES'.
1597 When the machine description has a specification `%PUNCT' (a `%' followed by
1598 a punctuation character), this macro is called with a null pointer for X and
1599 the punctuation character for CODE. */
1600 #define PRINT_OPERAND(STREAM, X, CODE) fr30_print_operand (STREAM, X, CODE)
1602 /* A C expression which evaluates to true if CODE is a valid punctuation
1603 character for use in the `PRINT_OPERAND' macro. If
1604 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no punctuation
1605 characters (except for the standard one, `%') are used in this way. */
1606 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) (CODE == '#')
1608 /* A C compound statement to output to stdio stream STREAM the assembler syntax
1609 for an instruction operand that is a memory reference whose address is X. X
1610 is an RTL expression.
1612 On some machines, the syntax for a symbolic address depends on the section
1613 that the address refers to. On these machines, define the macro
1614 `ENCODE_SECTION_INFO' to store the information into the `symbol_ref', and
1615 then check for it here. *Note Assembler Format::. */
1616 #define PRINT_OPERAND_ADDRESS(STREAM, X) fr30_print_operand_address (STREAM, X)
1618 /* If defined, C string expressions to be used for the `%R', `%L', `%U', and
1619 `%I' options of `asm_fprintf' (see `final.c'). These are useful when a
1620 single `md' file must support multiple assembler formats. In that case, the
1621 various `tm.h' files can define these macros differently.
1623 USER_LABEL_PREFIX is defined in svr4.h. */
1624 #define REGISTER_PREFIX "%"
1625 #define LOCAL_LABEL_PREFIX "."
1626 #define USER_LABEL_PREFIX ""
1627 #define IMMEDIATE_PREFIX ""
1630 /*{{{ Output of Dispatch Tables. */
1632 /* This macro should be provided on machines where the addresses in a dispatch
1633 table are relative to the table's own address.
1635 The definition should be a C statement to output to the stdio stream STREAM
1636 an assembler pseudo-instruction to generate a difference between two labels.
1637 VALUE and REL are the numbers of two internal labels. The definitions of
1638 these labels are output using `ASM_OUTPUT_INTERNAL_LABEL', and they must be
1639 printed in the same way here. For example,
1641 fprintf (STREAM, "\t.word L%d-L%d\n", VALUE, REL) */
1642 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
1643 fprintf (STREAM, "\t.word .L%d-.L%d\n", VALUE, REL)
1645 /* This macro should be provided on machines where the addresses in a dispatch
1648 The definition should be a C statement to output to the stdio stream STREAM
1649 an assembler pseudo-instruction to generate a reference to a label. VALUE
1650 is the number of an internal label whose definition is output using
1651 `ASM_OUTPUT_INTERNAL_LABEL'. For example,
1653 fprintf (STREAM, "\t.word L%d\n", VALUE) */
1654 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
1655 fprintf (STREAM, "\t.word .L%d\n", VALUE)
1658 /*{{{ Assembler Commands for Alignment. */
1660 /* A C statement to output to the stdio stream STREAM an assembler command to
1661 advance the location counter to a multiple of 2 to the POWER bytes. POWER
1662 will be a C expression of type `int'. */
1663 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
1664 fprintf ((STREAM), "\t.p2align %d\n", (POWER))
1667 /*{{{ Macros Affecting all Debug Formats. */
1669 /* A C expression that returns the DBX register number for the compiler
1670 register number REGNO. In simple cases, the value of this expression may be
1671 REGNO itself. But sometimes there are some registers that the compiler
1672 knows about and DBX does not, or vice versa. In such cases, some register
1673 may need to have one number in the compiler and another for DBX.
1675 If two registers have consecutive numbers inside GNU CC, and they can be
1676 used as a pair to hold a multiword value, then they *must* have consecutive
1677 numbers after renumbering with `DBX_REGISTER_NUMBER'. Otherwise, debuggers
1678 will be unable to access such a pair, because they expect register pairs to
1679 be consecutive in their own numbering scheme.
1681 If you find yourself defining `DBX_REGISTER_NUMBER' in way that does not
1682 preserve register pairs, then what you must do instead is redefine the
1683 actual register numbering scheme. */
1684 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
1687 /*{{{ Macros for SDB and Dwarf Output. */
1689 /* Define this macro to allow references to structure, union, or enumeration
1690 tags that have not yet been seen to be handled. Some assemblers choke if
1691 forward tags are used, while some require it. */
1692 /* #define SDB_ALLOW_FORWARD_REFERENCES */
1694 #define DWARF_LINE_MIN_INSTR_LENGTH 2
1697 /*{{{ Miscellaneous Parameters. */
1699 /* An alias for a machine mode name. This is the machine mode that elements of
1700 a jump-table should have. */
1701 #define CASE_VECTOR_MODE SImode
1703 /* An alias for a tree code that is the easiest kind of division to compile
1704 code for in the general case. It may be `TRUNC_DIV_EXPR', `FLOOR_DIV_EXPR',
1705 `CEIL_DIV_EXPR' or `ROUND_DIV_EXPR'. These four division operators differ
1706 in how they round the result to an integer. `EASY_DIV_EXPR' is used when it
1707 is permissible to use any of those kinds of division and the choice should
1708 be made on the basis of efficiency. */
1709 #define EASY_DIV_EXPR TRUNC_DIV_EXPR
1711 /* The maximum number of bytes that a single instruction can move quickly from
1712 memory to memory. */
1715 /* A C expression which is nonzero if on this machine it is safe to "convert"
1716 an integer of INPREC bits to one of OUTPREC bits (where OUTPREC is smaller
1717 than INPREC) by merely operating on it as if it had only OUTPREC bits.
1719 On many machines, this expression can be 1.
1721 When `TRULY_NOOP_TRUNCATION' returns 1 for a pair of sizes for modes for
1722 which `MODES_TIEABLE_P' is 0, suboptimal code can result. If this is the
1723 case, making `TRULY_NOOP_TRUNCATION' return 0 in such cases may improve
1725 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1727 /* An alias for the machine mode for pointers. On most machines, define this
1728 to be the integer mode corresponding to the width of a hardware pointer;
1729 `SImode' on 32-bit machine or `DImode' on 64-bit machines. On some machines
1730 you must define this to be one of the partial integer modes, such as
1733 The width of `Pmode' must be at least as large as the value of
1734 `POINTER_SIZE'. If it is not equal, you must define the macro
1735 `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to `Pmode'. */
1736 #define Pmode SImode
1738 /* An alias for the machine mode used for memory references to functions being
1739 called, in `call' RTL expressions. On most machines this should be
1741 #define FUNCTION_MODE QImode
1743 /* If cross-compiling, don't require stdio.h etc to build libgcc.a. */
1744 #if defined CROSS_COMPILE && ! defined inhibit_libc
1745 #define inhibit_libc
1749 /*{{{ Exported variables */
1751 /* Define the information needed to generate branch and scc insns. This is
1752 stored from the compare operation. Note that we can't use "rtx" here
1753 since it hasn't been defined! */
1755 extern struct rtx_def * fr30_compare_op0;
1756 extern struct rtx_def * fr30_compare_op1;
1759 /*{{{ PERDICATE_CODES. */
1761 #define PREDICATE_CODES \
1762 { "stack_add_operand", { CONST_INT }}, \
1763 { "high_register_operand", { REG }}, \
1764 { "low_register_operand", { REG }}, \
1765 { "call_operand", { MEM }}, \
1766 { "fp_displacement_operand", { CONST_INT }}, \
1767 { "sp_displacement_operand", { CONST_INT }}, \
1768 { "di_operand", { CONST_INT, CONST_DOUBLE, REG, MEM }}, \
1769 { "nonimmediate_di_operand", { REG, MEM }}, \
1770 { "add_immediate_operand", { REG, CONST_INT }},
1774 /* Local Variables: */
1775 /* folded-file: t */