1 /* Definitions of target machine for GNU compiler,
2 for ATMEL AVR at90s8515, ATmega103/103L, ATmega603/603L microcontrollers.
3 Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
4 Contributed by Denis Chertykov (denisc@overta.ru)
6 This file is part of GNU CC.
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 /* Names to predefine in the preprocessor for this target machine. */
25 #define CPP_PREDEFINES "-DAVR"
28 /* This declaration should be present. */
29 extern int target_flags;
31 #define MASK_RTL_DUMP 0x00000010
32 #define MASK_ALL_DEBUG 0x00000FE0
33 #define MASK_ORDER_1 0x00001000
34 #define MASK_INSN_SIZE_DUMP 0x00002000
35 #define MASK_ORDER_2 0x00004000
36 #define MASK_NO_TABLEJUMP 0x00008000
37 #define MASK_INT8 0x00010000
38 #define MASK_NO_INTERRUPTS 0x00020000
39 #define MASK_CALL_PROLOGUES 0x00040000
40 #define MASK_TINY_STACK 0x00080000
42 #define TARGET_ORDER_1 (target_flags & MASK_ORDER_1)
43 #define TARGET_ORDER_2 (target_flags & MASK_ORDER_2)
44 #define TARGET_INT8 (target_flags & MASK_INT8)
45 #define TARGET_NO_INTERRUPTS (target_flags & MASK_NO_INTERRUPTS)
46 #define TARGET_INSN_SIZE_DUMP (target_flags & MASK_INSN_SIZE_DUMP)
47 #define TARGET_CALL_PROLOGUES (target_flags & MASK_CALL_PROLOGUES)
48 #define TARGET_TINY_STACK (target_flags & MASK_TINY_STACK)
49 #define TARGET_NO_TABLEJUMP (target_flags & MASK_NO_TABLEJUMP)
51 /* Dump each assembler insn's rtl into the output file.
52 This is for debugging the compiler itself. */
54 #define TARGET_RTL_DUMP (target_flags & MASK_RTL_DUMP)
55 #define TARGET_ALL_DEBUG (target_flags & MASK_ALL_DEBUG)
60 #define TARGET_SWITCHES { \
61 { "order1", MASK_ORDER_1, NULL }, \
62 { "order2", MASK_ORDER_2, NULL }, \
63 { "int8", MASK_INT8, N_("Assume int to be 8 bit integer") }, \
64 { "no-interrupts", MASK_NO_INTERRUPTS, \
65 N_("Change the stack pointer without disabling interrupts") }, \
66 { "call-prologues", MASK_CALL_PROLOGUES, \
67 N_("Use subroutines for function prologue/epilogue") }, \
68 { "tiny-stack", MASK_TINY_STACK, \
69 N_("Change only the low 8 bits of the stack pointer") }, \
70 { "no-tablejump", MASK_NO_TABLEJUMP, \
71 N_("Do not generate tablejump insns") }, \
72 { "rtl", MASK_RTL_DUMP, NULL }, \
73 { "size", MASK_INSN_SIZE_DUMP, \
74 N_("Output instruction sizes to the asm file") }, \
75 { "deb", MASK_ALL_DEBUG, NULL }, \
78 extern const char *avr_init_stack;
79 extern const char *avr_mcu_name;
80 extern int avr_mega_p;
81 extern int avr_enhanced_p;
83 #define AVR_MEGA (avr_mega_p)
84 #define AVR_ENHANCED (avr_enhanced_p)
86 #define TARGET_OPTIONS { \
87 { "init-stack=", &avr_init_stack, N_("Specify the initial stack address") }, \
88 { "mcu=", &avr_mcu_name, N_("Specify the MCU name") } }
90 #define TARGET_VERSION fprintf (stderr, " (GNU assembler syntax)");
91 /* This macro is a C statement to print on `stderr' a string
92 describing the particular machine description choice. Every
93 machine description should define `TARGET_VERSION'. For example:
96 #define TARGET_VERSION \
97 fprintf (stderr, " (68k, Motorola syntax)");
99 #define TARGET_VERSION \
100 fprintf (stderr, " (68k, MIT syntax)");
103 #define OVERRIDE_OPTIONS avr_override_options()
104 /* `OVERRIDE_OPTIONS'
105 Sometimes certain combinations of command options do not make
106 sense on a particular target machine. You can define a macro
107 `OVERRIDE_OPTIONS' to take account of this. This macro, if
108 defined, is executed once just after all the command options have
111 Don't use this macro to turn on various extra optimizations for
112 `-O'. That is what `OPTIMIZATION_OPTIONS' is for. */
114 #define CAN_DEBUG_WITHOUT_FP
115 /* Define this macro if debugging can be performed even without a
116 frame pointer. If this macro is defined, GNU CC will turn on the
117 `-fomit-frame-pointer' option whenever `-O' is specified. */
119 /* Define this if most significant byte of a word is the lowest numbered. */
120 #define BITS_BIG_ENDIAN 0
122 /* Define this if most significant byte of a word is the lowest numbered. */
123 #define BYTES_BIG_ENDIAN 0
125 /* Define this if most significant word of a multiword number is the lowest
127 #define WORDS_BIG_ENDIAN 0
129 /* Width in bits of a "word", which is the contents of a machine register.
130 Note that this is not necessarily the width of data type `int'; */
131 #define BITS_PER_WORD 8
134 /* This is to get correct SI and DI modes in libgcc2.c (32 and 64 bits). */
135 #define UNITS_PER_WORD 4
137 /* Width of a word, in units (bytes). */
138 #define UNITS_PER_WORD 1
141 /* Width in bits of a pointer.
142 See also the macro `Pmode' defined below. */
143 #define POINTER_SIZE 16
146 /* Maximum sized of reasonable data type
147 DImode or Dfmode ... */
148 #define MAX_FIXED_MODE_SIZE 32
150 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
151 #define PARM_BOUNDARY 8
153 /* Allocation boundary (in *bits*) for the code of a function. */
154 #define FUNCTION_BOUNDARY 8
156 /* Alignment of field after `int : 0' in a structure. */
157 #define EMPTY_FIELD_BOUNDARY 8
159 /* No data type wants to be aligned rounder than this. */
160 #define BIGGEST_ALIGNMENT 8
163 /* Define this if move instructions will actually fail to work
164 when given unaligned data. */
165 #define STRICT_ALIGNMENT 0
167 /* A C expression for the size in bits of the type `int' on the
168 target machine. If you don't define this, the default is one word. */
169 #define INT_TYPE_SIZE (TARGET_INT8 ? 8 : 16)
172 /* A C expression for the size in bits of the type `short' on the
173 target machine. If you don't define this, the default is half a
174 word. (If this would be less than one storage unit, it is rounded
176 #define SHORT_TYPE_SIZE (INT_TYPE_SIZE == 8 ? INT_TYPE_SIZE : 16)
178 /* A C expression for the size in bits of the type `long' on the
179 target machine. If you don't define this, the default is one word. */
180 #define LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 16 : 32)
182 #define MAX_LONG_TYPE_SIZE 32
183 /* Maximum number for the size in bits of the type `long' on the
184 target machine. If this is undefined, the default is
185 `LONG_TYPE_SIZE'. Otherwise, it is the constant value that is the
186 largest value that `LONG_TYPE_SIZE' can have at run-time. This is
190 #define LONG_LONG_TYPE_SIZE 64
191 /* A C expression for the size in bits of the type `long long' on the
192 target machine. If you don't define this, the default is two
193 words. If you want to support GNU Ada on your machine, the value
194 of macro must be at least 64. */
197 #define FLOAT_TYPE_SIZE 32
198 /* A C expression for the size in bits of the type `float' on the
199 target machine. If you don't define this, the default is one word. */
201 #define DOUBLE_TYPE_SIZE 32
202 /* A C expression for the size in bits of the type `double' on the
203 target machine. If you don't define this, the default is two
207 #define LONG_DOUBLE_TYPE_SIZE 32
208 /* A C expression for the size in bits of the type `long double' on
209 the target machine. If you don't define this, the default is two
212 #define DEFAULT_SIGNED_CHAR 1
213 /* An expression whose value is 1 or 0, according to whether the type
214 `char' should be signed or unsigned by default. The user can
215 always override this default with the options `-fsigned-char' and
216 `-funsigned-char'. */
218 /* `DEFAULT_SHORT_ENUMS'
219 A C expression to determine whether to give an `enum' type only as
220 many bytes as it takes to represent the range of possible values
221 of that type. A nonzero value means to do that; a zero value
222 means all `enum' types should be allocated like `int'.
224 If you don't define the macro, the default is 0. */
226 #define SIZE_TYPE (INT_TYPE_SIZE == 8 ? "long unsigned int" : "unsigned int")
227 /* A C expression for a string describing the name of the data type
228 to use for size values. The typedef name `size_t' is defined
229 using the contents of the string.
231 The string can contain more than one keyword. If so, separate
232 them with spaces, and write first any length keyword, then
233 `unsigned' if appropriate, and finally `int'. The string must
234 exactly match one of the data type names defined in the function
235 `init_decl_processing' in the file `c-decl.c'. You may not omit
236 `int' or change the order--that would cause the compiler to crash
239 If you don't define this macro, the default is `"long unsigned
242 #define PTRDIFF_TYPE (INT_TYPE_SIZE == 8 ? "long int" :"int")
243 /* A C expression for a string describing the name of the data type
244 to use for the result of subtracting two pointers. The typedef
245 name `ptrdiff_t' is defined using the contents of the string. See
246 `SIZE_TYPE' above for more information.
248 If you don't define this macro, the default is `"long int"'. */
251 #define WCHAR_TYPE_SIZE 16
252 /* A C expression for the size in bits of the data type for wide
253 characters. This is used in `cpp', which cannot make use of
256 #define FIRST_PSEUDO_REGISTER 36
257 /* Number of hardware registers known to the compiler. They receive
258 numbers 0 through `FIRST_PSEUDO_REGISTER-1'; thus, the first
259 pseudo register's number really is assigned the number
260 `FIRST_PSEUDO_REGISTER'. */
262 #define FIXED_REGISTERS {\
280 1,1 /* arg pointer */ }
281 /* An initializer that says which registers are used for fixed
282 purposes all throughout the compiled code and are therefore not
283 available for general allocation. These would include the stack
284 pointer, the frame pointer (except on machines where that can be
285 used as a general register when no frame pointer is needed), the
286 program counter on machines where that is considered one of the
287 addressable registers, and any other numbered register with a
290 This information is expressed as a sequence of numbers, separated
291 by commas and surrounded by braces. The Nth number is 1 if
292 register N is fixed, 0 otherwise.
294 The table initialized from this macro, and the table initialized by
295 the following one, may be overridden at run time either
296 automatically, by the actions of the macro
297 `CONDITIONAL_REGISTER_USAGE', or by the user with the command
298 options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'. */
300 #define CALL_USED_REGISTERS { \
318 1,1 /* arg pointer */ }
319 /* Like `FIXED_REGISTERS' but has 1 for each register that is
320 clobbered (in general) by function calls as well as for fixed
321 registers. This macro therefore identifies the registers that are
322 not available for general allocation of values that must live
323 across function calls.
325 If a register has 0 in `CALL_USED_REGISTERS', the compiler
326 automatically saves it on function entry and restores it on
327 function exit, if the register is used within the function. */
329 #define NON_SAVING_SETJMP 0
330 /* If this macro is defined and has a nonzero value, it means that
331 `setjmp' and related functions fail to save the registers, or that
332 `longjmp' fails to restore them. To compensate, the compiler
333 avoids putting variables in registers in functions that use
336 #define REG_ALLOC_ORDER { \
344 17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2, \
348 /* If defined, an initializer for a vector of integers, containing the
349 numbers of hard registers in the order in which GNU CC should
350 prefer to use them (from most preferred to least).
352 If this macro is not defined, registers are used lowest numbered
353 first (all else being equal).
355 One use of this macro is on machines where the highest numbered
356 registers must always be saved and the save-multiple-registers
357 instruction supports only sequences of consetionve registers. On
358 such machines, define `REG_ALLOC_ORDER' to be an initializer that
359 lists the highest numbered allocatable register first. */
361 #define ORDER_REGS_FOR_LOCAL_ALLOC order_regs_for_local_alloc ()
362 /* ORDER_REGS_FOR_LOCAL_ALLOC'
363 A C statement (sans semicolon) to choose the order in which to
364 allocate hard registers for pseudo-registers local to a basic
367 Store the desired register order in the array `reg_alloc_order'.
368 Element 0 should be the register to allocate first; element 1, the
369 next register; and so on.
371 The macro body should not assume anything about the contents of
372 `reg_alloc_order' before execution of the macro.
374 On most machines, it is not necessary to define this macro. */
377 #define HARD_REGNO_NREGS(REGNO, MODE) ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
379 /* A C expression for the number of consecutive hard registers,
380 starting at register number REGNO, required to hold a value of mode
383 On a machine where all registers are exactly one word, a suitable
384 definition of this macro is
386 #define HARD_REGNO_NREGS(REGNO, MODE) \
387 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
388 / UNITS_PER_WORD)) */
390 #define HARD_REGNO_MODE_OK(REGNO, MODE) avr_hard_regno_mode_ok(REGNO, MODE)
391 /* A C expression that is nonzero if it is permissible to store a
392 value of mode MODE in hard register number REGNO (or in several
393 registers starting with that one). For a machine where all
394 registers are equivalent, a suitable definition is
396 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
398 It is not necessary for this macro to check for the numbers of
399 fixed registers, because the allocation mechanism considers them
400 to be always occupied.
402 On some machines, double-precision values must be kept in even/odd
403 register pairs. The way to implement that is to define this macro
404 to reject odd register numbers for such modes.
406 The minimum requirement for a mode to be OK in a register is that
407 the `movMODE' instruction pattern support moves between the
408 register and any other hard register for which the mode is OK; and
409 that moving a value into the register and back out not alter it.
411 Since the same instruction used to move `SImode' will work for all
412 narrower integer modes, it is not necessary on any machine for
413 `HARD_REGNO_MODE_OK' to distinguish between these modes, provided
414 you define patterns `movhi', etc., to take advantage of this. This
415 is useful because of the interaction between `HARD_REGNO_MODE_OK'
416 and `MODES_TIEABLE_P'; it is very desirable for all integer modes
419 Many machines have special registers for floating point arithmetic.
420 Often people assume that floating point machine modes are allowed
421 only in floating point registers. This is not true. Any
422 registers that can hold integers can safely *hold* a floating
423 point machine mode, whether or not floating arithmetic can be done
424 on it in those registers. Integer move instructions can be used
427 On some machines, though, the converse is true: fixed-point machine
428 modes may not go in floating registers. This is true if the
429 floating registers normalize any value stored in them, because
430 storing a non-floating value there would garble it. In this case,
431 `HARD_REGNO_MODE_OK' should reject fixed-point machine modes in
432 floating registers. But if the floating registers do not
433 automatically normalize, if you can store any bit pattern in one
434 and retrieve it unchanged without a trap, then any machine mode
435 may go in a floating register, so you can define this macro to say
438 The primary significance of special floating registers is rather
439 that they are the registers acceptable in floating point arithmetic
440 instructions. However, this is of no concern to
441 `HARD_REGNO_MODE_OK'. You handle it by writing the proper
442 constraints for those instructions.
444 On some machines, the floating registers are especially slow to
445 access, so that it is better to store a value in a stack frame
446 than in such a register if floating point arithmetic is not being
447 done. As long as the floating registers are not in class
448 `GENERAL_REGS', they will not be used unless some pattern's
449 constraint asks for one. */
451 #define MODES_TIEABLE_P(MODE1, MODE2) 0
452 /* A C expression that is nonzero if it is desirable to choose
453 register allocation so as to avoid move instructions between a
454 value of mode MODE1 and a value of mode MODE2.
456 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R,
457 MODE2)' are ever different for any R, then `MODES_TIEABLE_P (MODE1,
458 MODE2)' must be zero. */
463 POINTER_X_REGS, /* r26 - r27 */
464 POINTER_Y_REGS, /* r28 - r29 */
465 POINTER_Z_REGS, /* r30 - r31 */
466 STACK_REG, /* STACK */
467 BASE_POINTER_REGS, /* r28 - r31 */
468 POINTER_REGS, /* r26 - r31 */
469 ADDW_REGS, /* r24 - r31 */
470 SIMPLE_LD_REGS, /* r16 - r23 */
471 LD_REGS, /* r16 - r31 */
472 NO_LD_REGS, /* r0 - r15 */
473 GENERAL_REGS, /* r0 - r31 */
474 ALL_REGS, LIM_REG_CLASSES
476 /* An enumeral type that must be defined with all the register class
477 names as enumeral values. `NO_REGS' must be first. `ALL_REGS'
478 must be the last register class, followed by one more enumeral
479 value, `LIM_REG_CLASSES', which is not a register class but rather
480 tells how many classes there are.
482 Each register class has a number, which is the value of casting
483 the class name to type `int'. The number serves as an index in
484 many of the tables described below. */
487 #define N_REG_CLASSES (int)LIM_REG_CLASSES
488 /* The number of distinct register classes, defined as follows:
490 #define N_REG_CLASSES (int) LIM_REG_CLASSES */
492 #define REG_CLASS_NAMES { \
495 "POINTER_X_REGS", /* r26 - r27 */ \
496 "POINTER_Y_REGS", /* r28 - r29 */ \
497 "POINTER_Z_REGS", /* r30 - r31 */ \
498 "STACK_REG", /* STACK */ \
499 "BASE_POINTER_REGS", /* r28 - r31 */ \
500 "POINTER_REGS", /* r26 - r31 */ \
501 "ADDW_REGS", /* r24 - r31 */ \
502 "SIMPLE_LD_REGS", /* r16 - r23 */ \
503 "LD_REGS", /* r16 - r31 */ \
504 "NO_LD_REGS", /* r0 - r15 */ \
505 "GENERAL_REGS", /* r0 - r31 */ \
507 /* An initializer containing the names of the register classes as C
508 string constants. These names are used in writing some of the
516 #define REG_CLASS_CONTENTS { \
517 {0x00000000,0x00000000}, /* NO_REGS */ \
518 {0x00000001,0x00000000}, /* R0_REG */ \
519 {3 << REG_X,0x00000000}, /* POINTER_X_REGS, r26 - r27 */ \
520 {3 << REG_Y,0x00000000}, /* POINTER_Y_REGS, r28 - r29 */ \
521 {3 << REG_Z,0x00000000}, /* POINTER_Z_REGS, r30 - r31 */ \
522 {0x00000000,0x00000003}, /* STACK_REG, STACK */ \
523 {(3 << REG_Y) | (3 << REG_Z), \
524 0x00000000}, /* BASE_POINTER_REGS, r28 - r31 */ \
525 {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z), \
526 0x00000000}, /* POINTER_REGS, r26 - r31 */ \
527 {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z) | (3 << REG_W), \
528 0x00000000}, /* ADDW_REGS, r24 - r31 */ \
529 {0x00ff0000,0x00000000}, /* SIMPLE_LD_REGS r16 - r23 */ \
530 {(3 << REG_X)|(3 << REG_Y)|(3 << REG_Z)|(3 << REG_W)|(0xff << 16), \
531 0x00000000}, /* LD_REGS, r16 - r31 */ \
532 {0x0000ffff,0x00000000}, /* NO_LD_REGS r0 - r15 */ \
533 {0xffffffff,0x00000000}, /* GENERAL_REGS, r0 - r31 */ \
534 {0xffffffff,0x00000003} /* ALL_REGS */ \
536 /* An initializer containing the contents of the register classes, as
537 integers which are bit masks. The Nth integer specifies the
538 contents of class N. The way the integer MASK is interpreted is
539 that register R is in the class if `MASK & (1 << R)' is 1.
541 When the machine has more than 32 registers, an integer does not
542 suffice. Then the integers are replaced by sub-initializers,
543 braced groupings containing several integers. Each
544 sub-initializer must be suitable as an initializer for the type
545 `HARD_REG_SET' which is defined in `hard-reg-set.h'. */
547 #define REGNO_REG_CLASS(R) avr_regno_reg_class(R)
548 /* A C expression whose value is a register class containing hard
549 register REGNO. In general there is more than one such class;
550 choose a class which is "minimal", meaning that no smaller class
551 also contains the register. */
553 #define BASE_REG_CLASS POINTER_REGS
554 /* A macro whose definition is the name of the class to which a valid
555 base register must belong. A base register is one used in an
556 address which is the register value plus a displacement. */
558 #define INDEX_REG_CLASS NO_REGS
559 /* A macro whose definition is the name of the class to which a valid
560 index register must belong. An index register is one used in an
561 address where its value is either multiplied by a scale factor or
562 added to another register (as well as added to a displacement). */
564 #define REG_CLASS_FROM_LETTER(C) avr_reg_class_from_letter(C)
565 /* A C expression which defines the machine-dependent operand
566 constraint letters for register classes. If CHAR is such a
567 letter, the value should be the register class corresponding to
568 it. Otherwise, the value should be `NO_REGS'. The register
569 letter `r', corresponding to class `GENERAL_REGS', will not be
570 passed to this macro; you do not need to handle it. */
572 #define REGNO_OK_FOR_BASE_P(r) (((r) < FIRST_PSEUDO_REGISTER \
576 || (r) == ARG_POINTER_REGNUM)) \
578 && (reg_renumber[r] == REG_X \
579 || reg_renumber[r] == REG_Y \
580 || reg_renumber[r] == REG_Z \
581 || (reg_renumber[r] \
582 == ARG_POINTER_REGNUM))))
583 /* A C expression which is nonzero if register number NUM is suitable
584 for use as a base register in operand addresses. It may be either
585 a suitable hard register or a pseudo register that has been
586 allocated such a hard register. */
588 /* #define REGNO_MODE_OK_FOR_BASE_P(r, m) regno_mode_ok_for_base_p(r, m)
589 A C expression that is just like `REGNO_OK_FOR_BASE_P', except that
590 that expression may examine the mode of the memory reference in
591 MODE. You should define this macro if the mode of the memory
592 reference affects whether a register may be used as a base
593 register. If you define this macro, the compiler will use it
594 instead of `REGNO_OK_FOR_BASE_P'. */
596 #define REGNO_OK_FOR_INDEX_P(NUM) 0
597 /* A C expression which is nonzero if register number NUM is suitable
598 for use as an index register in operand addresses. It may be
599 either a suitable hard register or a pseudo register that has been
600 allocated such a hard register.
602 The difference between an index register and a base register is
603 that the index register may be scaled. If an address involves the
604 sum of two registers, neither one of them scaled, then either one
605 may be labeled the "base" and the other the "index"; but whichever
606 labeling is used must fit the machine's constraints of which
607 registers may serve in each capacity. The compiler will try both
608 labelings, looking for one that is valid, and will reload one or
609 both registers only if neither labeling works. */
611 #define PREFERRED_RELOAD_CLASS(X, CLASS) preferred_reload_class(X,CLASS)
612 /* A C expression that places additional restrictions on the register
613 class to use when it is necessary to copy value X into a register
614 in class CLASS. The value is a register class; perhaps CLASS, or
615 perhaps another, smaller class. On many machines, the following
618 #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS
620 Sometimes returning a more restrictive class makes better code.
621 For example, on the 68000, when X is an integer constant that is
622 in range for a `moveq' instruction, the value of this macro is
623 always `DATA_REGS' as long as CLASS includes the data registers.
624 Requiring a data register guarantees that a `moveq' will be used.
626 If X is a `const_double', by returning `NO_REGS' you can force X
627 into a memory constant. This is useful on certain machines where
628 immediate floating values cannot be loaded into certain kinds of
630 /* `PREFERRED_OUTPUT_RELOAD_CLASS (X, CLASS)'
631 Like `PREFERRED_RELOAD_CLASS', but for output reloads instead of
632 input reloads. If you don't define this macro, the default is to
633 use CLASS, unchanged. */
635 /* `LIMIT_RELOAD_CLASS (MODE, CLASS)'
636 A C expression that places additional restrictions on the register
637 class to use when it is necessary to be able to hold a value of
638 mode MODE in a reload register for which class CLASS would
641 Unlike `PREFERRED_RELOAD_CLASS', this macro should be used when
642 there are certain modes that simply can't go in certain reload
645 The value is a register class; perhaps CLASS, or perhaps another,
648 Don't define this macro unless the target machine has limitations
649 which require the macro to do something nontrivial. */
651 /* SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X)
652 `SECONDARY_RELOAD_CLASS (CLASS, MODE, X)'
653 `SECONDARY_OUTPUT_RELOAD_CLASS (CLASS, MODE, X)'
654 Many machines have some registers that cannot be copied directly
655 to or from memory or even from other types of registers. An
656 example is the `MQ' register, which on most machines, can only be
657 copied to or from general registers, but not memory. Some
658 machines allow copying all registers to and from memory, but
659 require a scratch register for stores to some memory locations
660 (e.g., those with symbolic address on the RT, and those with
661 certain symbolic address on the Sparc when compiling PIC). In
662 some cases, both an intermediate and a scratch register are
665 You should define these macros to indicate to the reload phase
666 that it may need to allocate at least one register for a reload in
667 addition to the register to contain the data. Specifically, if
668 copying X to a register CLASS in MODE requires an intermediate
669 register, you should define `SECONDARY_INPUT_RELOAD_CLASS' to
670 return the largest register class all of whose registers can be
671 used as intermediate registers or scratch registers.
673 If copying a register CLASS in MODE to X requires an intermediate
674 or scratch register, `SECONDARY_OUTPUT_RELOAD_CLASS' should be
675 defined to return the largest register class required. If the
676 requirements for input and output reloads are the same, the macro
677 `SECONDARY_RELOAD_CLASS' should be used instead of defining both
680 The values returned by these macros are often `GENERAL_REGS'.
681 Return `NO_REGS' if no spare register is needed; i.e., if X can be
682 directly copied to or from a register of CLASS in MODE without
683 requiring a scratch register. Do not define this macro if it
684 would always return `NO_REGS'.
686 If a scratch register is required (either with or without an
687 intermediate register), you should define patterns for
688 `reload_inM' or `reload_outM', as required (*note Standard
689 Names::.. These patterns, which will normally be implemented with
690 a `define_expand', should be similar to the `movM' patterns,
691 except that operand 2 is the scratch register.
693 Define constraints for the reload register and scratch register
694 that contain a single register class. If the original reload
695 register (whose class is CLASS) can meet the constraint given in
696 the pattern, the value returned by these macros is used for the
697 class of the scratch register. Otherwise, two additional reload
698 registers are required. Their classes are obtained from the
699 constraints in the insn pattern.
701 X might be a pseudo-register or a `subreg' of a pseudo-register,
702 which could either be in a hard register or in memory. Use
703 `true_regnum' to find out; it will return -1 if the pseudo is in
704 memory and the hard register number if it is in a register.
706 These macros should not be used in the case where a particular
707 class of registers can only be copied to memory and not to another
708 class of registers. In that case, secondary reload registers are
709 not needed and would not be helpful. Instead, a stack location
710 must be used to perform the copy and the `movM' pattern should use
711 memory as an intermediate storage. This case often occurs between
712 floating-point and general registers. */
714 /* `SECONDARY_MEMORY_NEEDED (CLASS1, CLASS2, M)'
715 Certain machines have the property that some registers cannot be
716 copied to some other registers without using memory. Define this
717 macro on those machines to be a C expression that is non-zero if
718 objects of mode M in registers of CLASS1 can only be copied to
719 registers of class CLASS2 by storing a register of CLASS1 into
720 memory and loading that memory location into a register of CLASS2.
722 Do not define this macro if its value would always be zero.
724 `SECONDARY_MEMORY_NEEDED_RTX (MODE)'
725 Normally when `SECONDARY_MEMORY_NEEDED' is defined, the compiler
726 allocates a stack slot for a memory location needed for register
727 copies. If this macro is defined, the compiler instead uses the
728 memory location defined by this macro.
730 Do not define this macro if you do not define
731 `SECONDARY_MEMORY_NEEDED'. */
733 #define SMALL_REGISTER_CLASSES 1
734 /* Normally the compiler avoids choosing registers that have been
735 explicitly mentioned in the rtl as spill registers (these
736 registers are normally those used to pass parameters and return
737 values). However, some machines have so few registers of certain
738 classes that there would not be enough registers to use as spill
739 registers if this were done.
741 Define `SMALL_REGISTER_CLASSES' to be an expression with a non-zero
742 value on these machines. When this macro has a non-zero value, the
743 compiler allows registers explicitly used in the rtl to be used as
744 spill registers but avoids extending the lifetime of these
747 It is always safe to define this macro with a non-zero value, but
748 if you unnecessarily define it, you will reduce the amount of
749 optimizations that can be performed in some cases. If you do not
750 define this macro with a non-zero value when it is required, the
751 compiler will run out of spill registers and print a fatal error
752 message. For most machines, you should not define this macro at
755 #define CLASS_LIKELY_SPILLED_P(c) class_likely_spilled_p(c)
756 /* A C expression whose value is nonzero if pseudos that have been
757 assigned to registers of class CLASS would likely be spilled
758 because registers of CLASS are needed for spill registers.
760 The default value of this macro returns 1 if CLASS has exactly one
761 register and zero otherwise. On most machines, this default
762 should be used. Only define this macro to some other expression
763 if pseudo allocated by `local-alloc.c' end up in memory because
764 their hard registers were needed for spill registers. If this
765 macro returns nonzero for those classes, those pseudos will only
766 be allocated by `global.c', which knows how to reallocate the
767 pseudo to another register. If there would not be another
768 register available for reallocation, you should not change the
769 definition of this macro since the only effect of such a
770 definition would be to slow down register allocation. */
772 #define CLASS_MAX_NREGS(CLASS, MODE) class_max_nregs (CLASS, MODE)
773 /* A C expression for the maximum number of consecutive registers of
774 class CLASS needed to hold a value of mode MODE.
776 This is closely related to the macro `HARD_REGNO_NREGS'. In fact,
777 the value of the macro `CLASS_MAX_NREGS (CLASS, MODE)' should be
778 the maximum value of `HARD_REGNO_NREGS (REGNO, MODE)' for all
779 REGNO values in the class CLASS.
781 This macro helps control the handling of multiple-word values in
784 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
785 ((C) == 'I' ? (VALUE) >= 0 && (VALUE) <= 63 : \
786 (C) == 'J' ? (VALUE) <= 0 && (VALUE) >= -63: \
787 (C) == 'K' ? (VALUE) == 2 : \
788 (C) == 'L' ? (VALUE) == 0 : \
789 (C) == 'M' ? (VALUE) >= 0 && (VALUE) <= 0xff : \
790 (C) == 'N' ? (VALUE) == -1: \
791 (C) == 'O' ? (VALUE) == 8 || (VALUE) == 16 || (VALUE) == 24: \
792 (C) == 'P' ? (VALUE) == 1 : \
795 /* A C expression that defines the machine-dependent operand
796 constraint letters (`I', `J', `K', ... `P') that specify
797 particular ranges of integer values. If C is one of those
798 letters, the expression should check that VALUE, an integer, is in
799 the appropriate range and return 1 if so, 0 otherwise. If C is
800 not one of those letters, the value should be 0 regardless of
803 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
804 ((C) == 'G' ? (VALUE) == CONST0_RTX (SFmode) \
806 /* `CONST_DOUBLE_OK_FOR_LETTER_P (VALUE, C)'
807 A C expression that defines the machine-dependent operand
808 constraint letters that specify particular ranges of
809 `const_double' values (`G' or `H').
811 If C is one of those letters, the expression should check that
812 VALUE, an RTX of code `const_double', is in the appropriate range
813 and return 1 if so, 0 otherwise. If C is not one of those
814 letters, the value should be 0 regardless of VALUE.
816 `const_double' is used for all floating-point constants and for
817 `DImode' fixed-point constants. A given letter can accept either
818 or both kinds of values. It can use `GET_MODE' to distinguish
819 between these kinds. */
821 #define EXTRA_CONSTRAINT(x, c) extra_constraint(x, c)
822 /* A C expression that defines the optional machine-dependent
823 constraint letters (``Q', `R', `S', `T', `U') that can'
824 be used to segregate specific types of operands, usually memory
825 references, for the target machine. Normally this macro will not
826 be defined. If it is required for a particular target machine, it
827 should return 1 if VALUE corresponds to the operand type
828 represented by the constraint letter C. If C is not defined as an
829 extra constraint, the value returned should be 0 regardless of
832 For example, on the ROMP, load instructions cannot have their
833 output in r0 if the memory reference contains a symbolic address.
834 Constraint letter `Q' is defined as representing a memory address
835 that does *not* contain a symbolic address. An alternative is
836 specified with a `Q' constraint on the input and `r' on the
837 output. The next alternative specifies `m' on the input and a
838 register class that does not include r0 on the output. */
840 /* This is an undocumented variable which describes
841 how GCC will push a data */
842 #define STACK_PUSH_CODE POST_DEC
844 #define STACK_GROWS_DOWNWARD
845 /* Define this macro if pushing a word onto the stack moves the stack
846 pointer to a smaller address.
848 When we say, "define this macro if ...," it means that the
849 compiler checks this macro only with `#ifdef' so the precise
850 definition used does not matter. */
852 #define STARTING_FRAME_OFFSET 1
853 /* Offset from the frame pointer to the first local variable slot to
856 If `FRAME_GROWS_DOWNWARD', find the next slot's offset by
857 subtracting the first slot's length from `STARTING_FRAME_OFFSET'.
858 Otherwise, it is found by adding the length of the first slot to
859 the value `STARTING_FRAME_OFFSET'. */
861 #define STACK_POINTER_OFFSET 1
862 /* Offset from the stack pointer register to the first location at
863 which outgoing arguments are placed. If not specified, the
864 default value of zero is used. This is the proper value for most
867 If `ARGS_GROW_DOWNWARD', this is the offset to the location above
868 the first location at which outgoing arguments are placed. */
870 #define FIRST_PARM_OFFSET(FUNDECL) 0
871 /* Offset from the argument pointer register to the first argument's
872 address. On some machines it may depend on the data type of the
875 If `ARGS_GROW_DOWNWARD', this is the offset to the location above
876 the first argument's address. */
878 /* `STACK_DYNAMIC_OFFSET (FUNDECL)'
879 Offset from the stack pointer register to an item dynamically
880 allocated on the stack, e.g., by `alloca'.
882 The default value for this macro is `STACK_POINTER_OFFSET' plus the
883 length of the outgoing arguments. The default is correct for most
884 machines. See `function.c' for details. */
886 #define STACK_BOUNDARY 8
887 /* Define this macro if there is a guaranteed alignment for the stack
888 pointer on this machine. The definition is a C expression for the
889 desired alignment (measured in bits). This value is used as a
890 default if PREFERRED_STACK_BOUNDARY is not defined. */
892 #define STACK_POINTER_REGNUM 32
893 /* The register number of the stack pointer register, which must also
894 be a fixed register according to `FIXED_REGISTERS'. On most
895 machines, the hardware determines which register this is. */
897 #define FRAME_POINTER_REGNUM REG_Y
898 /* The register number of the frame pointer register, which is used to
899 access automatic variables in the stack frame. On some machines,
900 the hardware determines which register this is. On other
901 machines, you can choose any register you wish for this purpose. */
903 #define ARG_POINTER_REGNUM 34
904 /* The register number of the arg pointer register, which is used to
905 access the function's argument list. On some machines, this is
906 the same as the frame pointer register. On some machines, the
907 hardware determines which register this is. On other machines,
908 you can choose any register you wish for this purpose. If this is
909 not the same register as the frame pointer register, then you must
910 mark it as a fixed register according to `FIXED_REGISTERS', or
911 arrange to be able to eliminate it (*note Elimination::.). */
913 #define STATIC_CHAIN_REGNUM 2
914 /* Register numbers used for passing a function's static chain
915 pointer. If register windows are used, the register number as
916 seen by the called function is `STATIC_CHAIN_INCOMING_REGNUM',
917 while the register number as seen by the calling function is
918 `STATIC_CHAIN_REGNUM'. If these registers are the same,
919 `STATIC_CHAIN_INCOMING_REGNUM' need not be defined.
921 The static chain register need not be a fixed register.
923 If the static chain is passed in memory, these macros should not be
924 defined; instead, the next two macros should be defined. */
926 #define FRAME_POINTER_REQUIRED frame_pointer_required_p()
927 /* A C expression which is nonzero if a function must have and use a
928 frame pointer. This expression is evaluated in the reload pass.
929 If its value is nonzero the function will have a frame pointer.
931 The expression can in principle examine the current function and
932 decide according to the facts, but on most machines the constant 0
933 or the constant 1 suffices. Use 0 when the machine allows code to
934 be generated with no frame pointer, and doing so saves some time
935 or space. Use 1 when there is no possible advantage to avoiding a
938 In certain cases, the compiler does not know how to produce valid
939 code without a frame pointer. The compiler recognizes those cases
940 and automatically gives the function a frame pointer regardless of
941 what `FRAME_POINTER_REQUIRED' says. You don't need to worry about
944 In a function that does not require a frame pointer, the frame
945 pointer register can be allocated for ordinary usage, unless you
946 mark it as a fixed register. See `FIXED_REGISTERS' for more
949 #define ELIMINABLE_REGS { \
950 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
951 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM} \
952 ,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}}
953 /* If defined, this macro specifies a table of register pairs used to
954 eliminate unneeded registers that point into the stack frame. If
955 it is not defined, the only elimination attempted by the compiler
956 is to replace references to the frame pointer with references to
959 The definition of this macro is a list of structure
960 initializations, each of which specifies an original and
961 replacement register.
963 On some machines, the position of the argument pointer is not
964 known until the compilation is completed. In such a case, a
965 separate hard register must be used for the argument pointer.
966 This register can be eliminated by replacing it with either the
967 frame pointer or the argument pointer, depending on whether or not
968 the frame pointer has been eliminated.
970 In this case, you might specify:
971 #define ELIMINABLE_REGS \
972 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
973 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
974 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
976 Note that the elimination of the argument pointer with the stack
977 pointer is specified first since that is the preferred elimination. */
979 #define CAN_ELIMINATE(FROM, TO) (((FROM) == ARG_POINTER_REGNUM \
980 && (TO) == FRAME_POINTER_REGNUM) \
981 || (((FROM) == FRAME_POINTER_REGNUM \
982 || (FROM) == FRAME_POINTER_REGNUM+1) \
983 && ! FRAME_POINTER_REQUIRED \
985 /* A C expression that returns non-zero if the compiler is allowed to
986 try to replace register number FROM-REG with register number
987 TO-REG. This macro need only be defined if `ELIMINABLE_REGS' is
988 defined, and will usually be the constant 1, since most of the
989 cases preventing register elimination are things that the compiler
990 already knows about. */
992 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
993 OFFSET = initial_elimination_offset (FROM, TO)
994 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It
995 specifies the initial difference between the specified pair of
996 registers. This macro must be defined if `ELIMINABLE_REGS' is
999 #define RETURN_ADDR_RTX(count, x) \
1000 gen_rtx_MEM (Pmode, memory_address (Pmode, plus_constant (tem, 1)))
1002 #define PUSH_ROUNDING(NPUSHED) (NPUSHED)
1003 /* A C expression that is the number of bytes actually pushed onto the
1004 stack when an instruction attempts to push NPUSHED bytes.
1006 If the target machine does not have a push instruction, do not
1007 define this macro. That directs GNU CC to use an alternate
1008 strategy: to allocate the entire argument block and then store the
1011 On some machines, the definition
1013 #define PUSH_ROUNDING(BYTES) (BYTES)
1015 will suffice. But on other machines, instructions that appear to
1016 push one byte actually push two bytes in an attempt to maintain
1017 alignment. Then the definition should be
1019 #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1) */
1021 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
1022 /* A C expression that should indicate the number of bytes of its own
1023 arguments that a function pops on returning, or 0 if the function
1024 pops no arguments and the caller must therefore pop them all after
1025 the function returns.
1027 FUNDECL is a C variable whose value is a tree node that describes
1028 the function in question. Normally it is a node of type
1029 `FUNCTION_DECL' that describes the declaration of the function.
1030 From this you can obtain the DECL_ATTRIBUTES of the
1033 FUNTYPE is a C variable whose value is a tree node that describes
1034 the function in question. Normally it is a node of type
1035 `FUNCTION_TYPE' that describes the data type of the function.
1036 From this it is possible to obtain the data types of the value and
1037 arguments (if known).
1039 When a call to a library function is being considered, FUNDECL
1040 will contain an identifier node for the library function. Thus, if
1041 you need to distinguish among various library functions, you can
1042 do so by their names. Note that "library function" in this
1043 context means a function used to perform arithmetic, whose name is
1044 known specially in the compiler and was not mentioned in the C
1045 code being compiled.
1047 STACK-SIZE is the number of bytes of arguments passed on the
1048 stack. If a variable number of bytes is passed, it is zero, and
1049 argument popping will always be the responsibility of the calling
1052 On the VAX, all functions always pop their arguments, so the
1053 definition of this macro is STACK-SIZE. On the 68000, using the
1054 standard calling convention, no functions pop their arguments, so
1055 the value of the macro is always 0 in this case. But an
1056 alternative calling convention is available in which functions
1057 that take a fixed number of arguments pop them but other functions
1058 (such as `printf') pop nothing (the caller pops all). When this
1059 convention is in use, FUNTYPE is examined to determine whether a
1060 function takes a fixed number of arguments. */
1062 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) (function_arg (&(CUM), MODE, TYPE, NAMED))
1063 /* A C expression that controls whether a function argument is passed
1064 in a register, and which register.
1066 The arguments are CUM, which summarizes all the previous
1067 arguments; MODE, the machine mode of the argument; TYPE, the data
1068 type of the argument as a tree node or 0 if that is not known
1069 (which happens for C support library functions); and NAMED, which
1070 is 1 for an ordinary argument and 0 for nameless arguments that
1071 correspond to `...' in the called function's prototype.
1073 The value of the expression is usually either a `reg' RTX for the
1074 hard register in which to pass the argument, or zero to pass the
1075 argument on the stack.
1077 For machines like the VAX and 68000, where normally all arguments
1078 are pushed, zero suffices as a definition.
1080 The value of the expression can also be a `parallel' RTX. This is
1081 used when an argument is passed in multiple locations. The mode
1082 of the of the `parallel' should be the mode of the entire
1083 argument. The `parallel' holds any number of `expr_list' pairs;
1084 each one describes where part of the argument is passed. In each
1085 `expr_list', the first operand can be either a `reg' RTX for the
1086 hard register in which to pass this part of the argument, or zero
1087 to pass the argument on the stack. If this operand is a `reg',
1088 then the mode indicates how large this part of the argument is.
1089 The second operand of the `expr_list' is a `const_int' which gives
1090 the offset in bytes into the entire argument where this part
1093 The usual way to make the ANSI library `stdarg.h' work on a machine
1094 where some arguments are usually passed in registers, is to cause
1095 nameless arguments to be passed on the stack instead. This is done
1096 by making `FUNCTION_ARG' return 0 whenever NAMED is 0.
1098 You may use the macro `MUST_PASS_IN_STACK (MODE, TYPE)' in the
1099 definition of this macro to determine if this argument is of a
1100 type that must be passed in the stack. If `REG_PARM_STACK_SPACE'
1101 is not defined and `FUNCTION_ARG' returns non-zero for such an
1102 argument, the compiler will abort. If `REG_PARM_STACK_SPACE' is
1103 defined, the argument will be computed in the stack and then
1104 loaded into a register. */
1106 typedef struct avr_args {
1107 int nregs; /* # registers available for passing */
1108 int regno; /* next available register number */
1110 /* A C type for declaring a variable that is used as the first
1111 argument of `FUNCTION_ARG' and other related values. For some
1112 target machines, the type `int' suffices and can hold the number
1113 of bytes of argument so far.
1115 There is no need to record in `CUMULATIVE_ARGS' anything about the
1116 arguments that have been passed on the stack. The compiler has
1117 other variables to keep track of that. For target machines on
1118 which all arguments are passed on the stack, there is no need to
1119 store anything in `CUMULATIVE_ARGS'; however, the data structure
1120 must exist and should not be empty, so use `int'. */
1122 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) init_cumulative_args (&(CUM), FNTYPE, LIBNAME, INDIRECT)
1124 /* A C statement (sans semicolon) for initializing the variable CUM
1125 for the state at the beginning of the argument list. The variable
1126 has type `CUMULATIVE_ARGS'. The value of FNTYPE is the tree node
1127 for the data type of the function which will receive the args, or 0
1128 if the args are to a compiler support library function. The value
1129 of INDIRECT is nonzero when processing an indirect call, for
1130 example a call through a function pointer. The value of INDIRECT
1131 is zero for a call to an explicitly named function, a library
1132 function call, or when `INIT_CUMULATIVE_ARGS' is used to find
1133 arguments for the function being compiled.
1135 When processing a call to a compiler support library function,
1136 LIBNAME identifies which one. It is a `symbol_ref' rtx which
1137 contains the name of the function, as a string. LIBNAME is 0 when
1138 an ordinary C function call is being processed. Thus, each time
1139 this macro is called, either LIBNAME or FNTYPE is nonzero, but
1140 never both of them at once. */
1142 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
1143 (function_arg_advance (&CUM, MODE, TYPE, NAMED))
1145 /* A C statement (sans semicolon) to update the summarizer variable
1146 CUM to advance past an argument in the argument list. The values
1147 MODE, TYPE and NAMED describe that argument. Once this is done,
1148 the variable CUM is suitable for analyzing the *following*
1149 argument with `FUNCTION_ARG', etc.
1151 This macro need not do anything if the argument in question was
1152 passed on the stack. The compiler knows how to track the amount
1153 of stack space used for arguments without any special help. */
1155 #define FUNCTION_ARG_REGNO_P(r) function_arg_regno_p(r)
1156 /* A C expression that is nonzero if REGNO is the number of a hard
1157 register in which function arguments are sometimes passed. This
1158 does *not* include implicit arguments such as the static chain and
1159 the structure-value address. On many machines, no registers can be
1160 used for this purpose since all function arguments are pushed on
1163 extern int avr_reg_order[];
1165 #define RET_REGISTER avr_ret_register ()
1167 #define FUNCTION_VALUE(VALTYPE, FUNC) avr_function_value (VALTYPE, FUNC)
1168 /* A C expression to create an RTX representing the place where a
1169 function returns a value of data type VALTYPE. VALTYPE is a tree
1170 node representing a data type. Write `TYPE_MODE (VALTYPE)' to get
1171 the machine mode used to represent that type. On many machines,
1172 only the mode is relevant. (Actually, on most machines, scalar
1173 values are returned in the same place regardless of mode).
1175 The value of the expression is usually a `reg' RTX for the hard
1176 register where the return value is stored. The value can also be a
1177 `parallel' RTX, if the return value is in multiple places. See
1178 `FUNCTION_ARG' for an explanation of the `parallel' form.
1180 If `PROMOTE_FUNCTION_RETURN' is defined, you must apply the same
1181 promotion rules specified in `PROMOTE_MODE' if VALTYPE is a scalar
1184 If the precise function being called is known, FUNC is a tree node
1185 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This
1186 makes it possible to use a different value-returning convention
1187 for specific functions when all their calls are known.
1189 `FUNCTION_VALUE' is not used for return vales with aggregate data
1190 types, because these are returned in another way. See
1191 `STRUCT_VALUE_REGNUM' and related macros, below. */
1193 #define LIBCALL_VALUE(MODE) avr_libcall_value (MODE)
1194 /* A C expression to create an RTX representing the place where a
1195 library function returns a value of mode MODE. If the precise
1196 function being called is known, FUNC is a tree node
1197 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This
1198 makes it possible to use a different value-returning convention
1199 for specific functions when all their calls are known.
1201 Note that "library function" in this context means a compiler
1202 support routine, used to perform arithmetic, whose name is known
1203 specially by the compiler and was not mentioned in the C code being
1206 The definition of `LIBRARY_VALUE' need not be concerned aggregate
1207 data types, because none of the library functions returns such
1210 #define FUNCTION_VALUE_REGNO_P(N) ((N) == RET_REGISTER)
1211 /* A C expression that is nonzero if REGNO is the number of a hard
1212 register in which the values of called function may come back.
1214 A register whose use for returning values is limited to serving as
1215 the second of a pair (for a value of type `double', say) need not
1216 be recognized by this macro. So for most machines, this definition
1219 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
1221 If the machine has register windows, so that the caller and the
1222 called function use different registers for the return value, this
1223 macro should recognize only the caller's register numbers. */
1225 #define RETURN_IN_MEMORY(TYPE) ((TYPE_MODE (TYPE) == BLKmode) \
1226 ? int_size_in_bytes (TYPE) > 8 \
1228 /* A C expression which can inhibit the returning of certain function
1229 values in registers, based on the type of value. A nonzero value
1230 says to return the function value in memory, just as large
1231 structures are always returned. Here TYPE will be a C expression
1232 of type `tree', representing the data type of the value.
1234 Note that values of mode `BLKmode' must be explicitly handled by
1235 this macro. Also, the option `-fpcc-struct-return' takes effect
1236 regardless of this macro. On most systems, it is possible to
1237 leave the macro undefined; this causes a default definition to be
1238 used, whose value is the constant 1 for `BLKmode' values, and 0
1241 Do not use this macro to indicate that structures and unions
1242 should always be returned in memory. You should instead use
1243 `DEFAULT_PCC_STRUCT_RETURN' to indicate this. */
1245 #define DEFAULT_PCC_STRUCT_RETURN 0
1246 /* Define this macro to be 1 if all structure and union return values
1247 must be in memory. Since this results in slower code, this should
1248 be defined only if needed for compatibility with other compilers
1249 or with an ABI. If you define this macro to be 0, then the
1250 conventions used for structure and union return values are decided
1251 by the `RETURN_IN_MEMORY' macro.
1253 If not defined, this defaults to the value 1. */
1255 #define STRUCT_VALUE 0
1256 /* If the structure value address is not passed in a register, define
1257 `STRUCT_VALUE' as an expression returning an RTX for the place
1258 where the address is passed. If it returns 0, the address is
1259 passed as an "invisible" first argument. */
1261 #define STRUCT_VALUE_INCOMING 0
1262 /* If the incoming location is not a register, then you should define
1263 `STRUCT_VALUE_INCOMING' as an expression for an RTX for where the
1264 called function should find the value. If it should find the
1265 value on the stack, define this to create a `mem' which refers to
1266 the frame pointer. A definition of 0 means that the address is
1267 passed as an "invisible" first argument. */
1269 #define EPILOGUE_USES(REGNO) 0
1270 /* Define this macro as a C expression that is nonzero for registers
1271 are used by the epilogue or the `return' pattern. The stack and
1272 frame pointer registers are already be assumed to be used as
1275 #define STRICT_ARGUMENT_NAMING 1
1276 /* Define this macro if the location where a function argument is
1277 passed depends on whether or not it is a named argument.
1279 This macro controls how the NAMED argument to `FUNCTION_ARG' is
1280 set for varargs and stdarg functions. With this macro defined,
1281 the NAMED argument is always true for named arguments, and false
1282 for unnamed arguments. If this is not defined, but
1283 `SETUP_INCOMING_VARARGS' is defined, then all arguments are
1284 treated as named. Otherwise, all named arguments except the last
1285 are treated as named. */
1288 #define HAVE_POST_INCREMENT 1
1289 /* Define this macro if the machine supports post-increment
1292 #define HAVE_PRE_DECREMENT 1
1293 /* #define HAVE_PRE_INCREMENT
1294 #define HAVE_POST_DECREMENT */
1295 /* Similar for other kinds of addressing. */
1297 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
1298 /* A C expression that is 1 if the RTX X is a constant which is a
1299 valid address. On most machines, this can be defined as
1300 `CONSTANT_P (X)', but a few machines are more restrictive in which
1301 constant addresses are supported.
1303 `CONSTANT_P' accepts integer-values expressions whose values are
1304 not explicitly known, such as `symbol_ref', `label_ref', and
1305 `high' expressions and `const' arithmetic expressions, in addition
1306 to `const_int' and `const_double' expressions. */
1308 #define MAX_REGS_PER_ADDRESS 1
1309 /* A number, the maximum number of registers that can appear in a
1310 valid memory address. Note that it is up to you to specify a
1311 value equal to the maximum number that `GO_IF_LEGITIMATE_ADDRESS'
1312 would ever accept. */
1314 #ifdef REG_OK_STRICT
1315 # define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
1317 if (legitimate_address_p (mode, operand, 1)) \
1321 # define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
1323 if (legitimate_address_p (mode, operand, 0)) \
1327 /* A C compound statement with a conditional `goto LABEL;' executed
1328 if X (an RTX) is a legitimate memory address on the target machine
1329 for a memory operand of mode MODE.
1331 It usually pays to define several simpler macros to serve as
1332 subroutines for this one. Otherwise it may be too complicated to
1335 This macro must exist in two variants: a strict variant and a
1336 non-strict one. The strict variant is used in the reload pass. It
1337 must be defined so that any pseudo-register that has not been
1338 allocated a hard register is considered a memory reference. In
1339 contexts where some kind of register is required, a pseudo-register
1340 with no hard register must be rejected.
1342 The non-strict variant is used in other passes. It must be
1343 defined to accept all pseudo-registers in every context where some
1344 kind of register is required.
1346 Compiler source files that want to use the strict variant of this
1347 macro define the macro `REG_OK_STRICT'. You should use an `#ifdef
1348 REG_OK_STRICT' conditional to define the strict variant in that
1349 case and the non-strict variant otherwise.
1351 Subroutines to check for acceptable registers for various purposes
1352 (one for base registers, one for index registers, and so on) are
1353 typically among the subroutines used to define
1354 `GO_IF_LEGITIMATE_ADDRESS'. Then only these subroutine macros
1355 need have two variants; the higher levels of macros may be the
1356 same whether strict or not.
1358 Normally, constant addresses which are the sum of a `symbol_ref'
1359 and an integer are stored inside a `const' RTX to mark them as
1360 constant. Therefore, there is no need to recognize such sums
1361 specifically as legitimate addresses. Normally you would simply
1362 recognize any `const' as legitimate.
1364 Usually `PRINT_OPERAND_ADDRESS' is not prepared to handle constant
1365 sums that are not marked with `const'. It assumes that a naked
1366 `plus' indicates indexing. If so, then you *must* reject such
1367 naked constant sums as illegitimate addresses, so that none of
1368 them will be given to `PRINT_OPERAND_ADDRESS'.
1370 On some machines, whether a symbolic address is legitimate depends
1371 on the section that the address refers to. On these machines,
1372 define the macro `ENCODE_SECTION_INFO' to store the information
1373 into the `symbol_ref', and then check for it here. When you see a
1374 `const', you will have to look inside it to find the `symbol_ref'
1375 in order to determine the section. *Note Assembler Format::.
1377 The best way to modify the name string is by adding text to the
1378 beginning, with suitable punctuation to prevent any ambiguity.
1379 Allocate the new name in `saveable_obstack'. You will have to
1380 modify `ASM_OUTPUT_LABELREF' to remove and decode the added text
1381 and output the name accordingly, and define `STRIP_NAME_ENCODING'
1382 to access the original name string.
1384 You can check the information stored here into the `symbol_ref' in
1385 the definitions of the macros `GO_IF_LEGITIMATE_ADDRESS' and
1386 `PRINT_OPERAND_ADDRESS'. */
1388 /* `REG_OK_FOR_BASE_P (X)'
1389 A C expression that is nonzero if X (assumed to be a `reg' RTX) is
1390 valid for use as a base register. For hard registers, it should
1391 always accept those which the hardware permits and reject the
1392 others. Whether the macro accepts or rejects pseudo registers
1393 must be controlled by `REG_OK_STRICT' as described above. This
1394 usually requires two variant definitions, of which `REG_OK_STRICT'
1395 controls the one actually used. */
1397 #define REG_OK_FOR_BASE_NOSTRICT_P(X) \
1398 (REGNO (X) >= FIRST_PSEUDO_REGISTER || REG_OK_FOR_BASE_STRICT_P(X))
1400 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
1402 #ifdef REG_OK_STRICT
1403 # define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P (X)
1405 # define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NOSTRICT_P (X)
1408 /* A C expression that is just like `REG_OK_FOR_BASE_P', except that
1409 that expression may examine the mode of the memory reference in
1410 MODE. You should define this macro if the mode of the memory
1411 reference affects whether a register may be used as a base
1412 register. If you define this macro, the compiler will use it
1413 instead of `REG_OK_FOR_BASE_P'. */
1414 #define REG_OK_FOR_INDEX_P(X) 0
1415 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is
1416 valid for use as an index register.
1418 The difference between an index register and a base register is
1419 that the index register may be scaled. If an address involves the
1420 sum of two registers, neither one of them scaled, then either one
1421 may be labeled the "base" and the other the "index"; but whichever
1422 labeling is used must fit the machine's constraints of which
1423 registers may serve in each capacity. The compiler will try both
1424 labelings, looking for one that is valid, and will reload one or
1425 both registers only if neither labeling works. */
1427 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
1429 (X) = legitimize_address (X, OLDX, MODE); \
1430 if (memory_address_p (MODE, X)) \
1433 /* A C compound statement that attempts to replace X with a valid
1434 memory address for an operand of mode MODE. WIN will be a C
1435 statement label elsewhere in the code; the macro definition may use
1437 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN);
1439 to avoid further processing if the address has become legitimate.
1441 X will always be the result of a call to `break_out_memory_refs',
1442 and OLDX will be the operand that was given to that function to
1445 The code generated by this macro should not alter the substructure
1446 of X. If it transforms X into a more legitimate form, it should
1447 assign X (which will always be a C variable) a new value.
1449 It is not necessary for this macro to come up with a legitimate
1450 address. The compiler has standard ways of doing so in all cases.
1451 In fact, it is safe for this macro to do nothing. But often a
1452 machine-dependent strategy can generate better code. */
1454 #define XEXP_(X,Y) (X)
1455 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN) \
1457 if (1&&(GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC)) \
1459 push_reload (XEXP (X,0), XEXP (X,0), &XEXP (X,0), &XEXP (X,0), \
1460 POINTER_REGS, GET_MODE (X),GET_MODE (X) , 0, 0, \
1461 OPNUM, RELOAD_OTHER); \
1464 if (GET_CODE (X) == PLUS \
1465 && REG_P (XEXP (X, 0)) \
1466 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1467 && INTVAL (XEXP (X, 1)) >= 1) \
1469 int fit = INTVAL (XEXP (X, 1)) <= (64 - GET_MODE_SIZE (MODE)); \
1472 if (reg_equiv_address[REGNO (XEXP (X, 0))] != 0) \
1474 int regno = REGNO (XEXP (X, 0)); \
1475 rtx mem = make_memloc (X, regno); \
1476 push_reload (XEXP (mem,0), NULL, &XEXP (mem,0), NULL, \
1477 POINTER_REGS, Pmode, VOIDmode, 0, 0, \
1478 1, ADDR_TYPE (TYPE)); \
1479 push_reload (mem, NULL_RTX, &XEXP (X, 0), NULL, \
1480 BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
1484 push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL, \
1485 BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
1489 else if (! (frame_pointer_needed && XEXP (X,0) == frame_pointer_rtx)) \
1491 push_reload (X, NULL_RTX, &X, NULL, \
1492 POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
1498 /* A C compound statement that attempts to replace X, which is an
1499 address that needs reloading, with a valid memory address for an
1500 operand of mode MODE. WIN will be a C statement label elsewhere
1501 in the code. It is not necessary to define this macro, but it
1502 might be useful for performance reasons.
1504 For example, on the i386, it is sometimes possible to use a single
1505 reload register instead of two by reloading a sum of two pseudo
1506 registers into a register. On the other hand, for number of RISC
1507 processors offsets are limited so that often an intermediate
1508 address needs to be generated in order to address a stack slot.
1509 By defining LEGITIMIZE_RELOAD_ADDRESS appropriately, the
1510 intermediate addresses generated for adjacent some stack slots can
1511 be made identical, and thus be shared.
1513 *Note*: This macro should be used with caution. It is necessary
1514 to know something of how reload works in order to effectively use
1515 this, and it is quite easy to produce macros that build in too
1516 much knowledge of reload internals.
1518 *Note*: This macro must be able to reload an address created by a
1519 previous invocation of this macro. If it fails to handle such
1520 addresses then the compiler may generate incorrect code or abort.
1522 The macro definition should use `push_reload' to indicate parts
1523 that need reloading; OPNUM, TYPE and IND_LEVELS are usually
1524 suitable to be passed unaltered to `push_reload'.
1526 The code generated by this macro must not alter the substructure of
1527 X. If it transforms X into a more legitimate form, it should
1528 assign X (which will always be a C variable) a new value. This
1529 also applies to parts that you change indirectly by calling
1532 The macro definition may use `strict_memory_address_p' to test if
1533 the address has become legitimate.
1535 If you want to change only a part of X, one standard way of doing
1536 this is to use `copy_rtx'. Note, however, that is unshares only a
1537 single level of rtl. Thus, if the part to be changed is not at the
1538 top level, you'll need to replace first the top leve It is not
1539 necessary for this macro to come up with a legitimate address;
1540 but often a machine-dependent strategy can generate better code. */
1542 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \
1543 if (GET_CODE (ADDR) == POST_INC || GET_CODE (ADDR) == PRE_DEC) \
1545 /* A C statement or compound statement with a conditional `goto
1546 LABEL;' executed if memory address X (an RTX) can have different
1547 meanings depending on the machine mode of the memory reference it
1548 is used for or if the address is valid for some modes but not
1551 Autoincrement and autodecrement addresses typically have
1552 mode-dependent effects because the amount of the increment or
1553 decrement is the size of the operand being addressed. Some
1554 machines have other mode-dependent addresses. Many RISC machines
1555 have no mode-dependent addresses.
1557 You may assume that ADDR is a valid address for the machine. */
1559 #define LEGITIMATE_CONSTANT_P(X) 1
1560 /* A C expression that is nonzero if X is a legitimate constant for
1561 an immediate operand on the target machine. You can assume that X
1562 satisfies `CONSTANT_P', so you need not check this. In fact, `1'
1563 is a suitable definition for this macro on machines where anything
1564 `CONSTANT_P' is valid. */
1566 #define CONST_COSTS(x,CODE,OUTER_CODE) \
1568 if (OUTER_CODE == PLUS \
1569 || OUTER_CODE == IOR \
1570 || OUTER_CODE == AND \
1571 || OUTER_CODE == MINUS \
1572 || OUTER_CODE == SET \
1573 || INTVAL (x) == 0) \
1575 if (OUTER_CODE == COMPARE \
1576 && INTVAL (x) >= 0 \
1577 && INTVAL (x) <= 255) \
1583 case CONST_DOUBLE: \
1586 /* A part of a C `switch' statement that describes the relative costs
1587 of constant RTL expressions. It must contain `case' labels for
1588 expression codes `const_int', `const', `symbol_ref', `label_ref'
1589 and `const_double'. Each case must ultimately reach a `return'
1590 statement to return the relative cost of the use of that kind of
1591 constant value in an expression. The cost may depend on the
1592 precise value of the constant, which is available for examination
1593 in X, and the rtx code of the expression in which it is contained,
1594 found in OUTER_CODE.
1596 CODE is the expression code--redundant, since it can be obtained
1597 with `GET_CODE (X)'. */
1599 #define DEFAULT_RTX_COSTS(x, code, outer_code) \
1601 int cst = default_rtx_costs (x, code, outer_code); \
1609 /* Like `CONST_COSTS' but applies to nonconstant RTL expressions.
1610 This can be used, for example, to indicate how costly a multiply
1611 instruction is. In writing this macro, you can use the construct
1612 `COSTS_N_INSNS (N)' to specify a cost equal to N fast
1613 instructions. OUTER_CODE is the code of the expression in which X
1616 This macro is optional; do not define it if the default cost
1617 assumptions are adequate for the target machine. */
1619 #define ADDRESS_COST(ADDRESS) avr_address_cost (ADDRESS)
1621 /* An expression giving the cost of an addressing mode that contains
1622 ADDRESS. If not defined, the cost is computed from the ADDRESS
1623 expression and the `CONST_COSTS' values.
1625 For most CISC machines, the default cost is a good approximation
1626 of the true cost of the addressing mode. However, on RISC
1627 machines, all instructions normally have the same length and
1628 execution time. Hence all addresses will have equal costs.
1630 In cases where more than one form of an address is known, the form
1631 with the lowest cost will be used. If multiple forms have the
1632 same, lowest, cost, the one that is the most complex will be used.
1634 For example, suppose an address that is equal to the sum of a
1635 register and a constant is used twice in the same basic block.
1636 When this macro is not defined, the address will be computed in a
1637 register and memory references will be indirect through that
1638 register. On machines where the cost of the addressing mode
1639 containing the sum is no higher than that of a simple indirect
1640 reference, this will produce an additional instruction and
1641 possibly require an additional register. Proper specification of
1642 this macro eliminates this overhead for such machines.
1644 Similar use of this macro is made in strength reduction of loops.
1646 ADDRESS need not be valid as an address. In such a case, the cost
1647 is not relevant and can be any value; invalid addresses need not be
1648 assigned a different cost.
1650 On machines where an address involving more than one register is as
1651 cheap as an address computation involving only one register,
1652 defining `ADDRESS_COST' to reflect this can cause two registers to
1653 be live over a region of code where only one would have been if
1654 `ADDRESS_COST' were not defined in that manner. This effect should
1655 be considered in the definition of this macro. Equivalent costs
1656 should probably only be given to addresses with different numbers
1657 of registers on machines with lots of registers.
1659 This macro will normally either not be defined or be defined as a
1662 #define REGISTER_MOVE_COST(MODE, FROM, TO) ((FROM) == STACK_REG ? 6 \
1663 : (TO) == STACK_REG ? 12 \
1665 /* A C expression for the cost of moving data from a register in class
1666 FROM to one in class TO. The classes are expressed using the
1667 enumeration values such as `GENERAL_REGS'. A value of 2 is the
1668 default; other values are interpreted relative to that.
1670 It is not required that the cost always equal 2 when FROM is the
1671 same as TO; on some machines it is expensive to move between
1672 registers if they are not general registers.
1674 If reload sees an insn consisting of a single `set' between two
1675 hard registers, and if `REGISTER_MOVE_COST' applied to their
1676 classes returns a value of 2, reload does not check to ensure that
1677 the constraints of the insn are met. Setting a cost of other than
1678 2 will allow reload to verify that the constraints are met. You
1679 should do this if the `movM' pattern's constraints do not allow
1682 #define MEMORY_MOVE_COST(MODE,CLASS,IN) ((MODE)==QImode ? 2 : \
1683 (MODE)==HImode ? 4 : \
1684 (MODE)==SImode ? 8 : \
1685 (MODE)==SFmode ? 8 : 16)
1686 /* A C expression for the cost of moving data of mode M between a
1687 register and memory. A value of 4 is the default; this cost is
1688 relative to those in `REGISTER_MOVE_COST'.
1690 If moving between registers and memory is more expensive than
1691 between two registers, you should define this macro to express the
1694 #define BRANCH_COST 0
1695 /* A C expression for the cost of a branch instruction. A value of 1
1696 is the default; other values are interpreted relative to that.
1698 Here are additional macros which do not specify precise relative
1699 costs, but only that certain actions are more expensive than GCC would
1700 ordinarily expect. */
1702 #define SLOW_BYTE_ACCESS 0
1703 /* Define this macro as a C expression which is nonzero if accessing
1704 less than a word of memory (i.e. a `char' or a `short') is no
1705 faster than accessing a word of memory, i.e., if such access
1706 require more than one instruction or if there is no difference in
1707 cost between byte and (aligned) word loads.
1709 When this macro is not defined, the compiler will access a field by
1710 finding the smallest containing object; when it is defined, a
1711 fullword load will be used if alignment permits. Unless bytes
1712 accesses are faster than word accesses, using word accesses is
1713 preferable since it may eliminate subsequent memory access if
1714 subsequent accesses occur to other fields in the same word of the
1715 structure, but to different bytes.
1717 `SLOW_UNALIGNED_ACCESS'
1718 Define this macro to be the value 1 if unaligned accesses have a
1719 cost many times greater than aligned accesses, for example if they
1720 are emulated in a trap handler.
1722 When this macro is non-zero, the compiler will act as if
1723 `STRICT_ALIGNMENT' were non-zero when generating code for block
1724 moves. This can cause significantly more instructions to be
1725 produced. Therefore, do not set this macro non-zero if unaligned
1726 accesses only add a cycle or two to the time for a memory access.
1728 If the value of this macro is always zero, it need not be defined.
1731 Define this macro to inhibit strength reduction of memory
1732 addresses. (On some machines, such strength reduction seems to do
1733 harm rather than good.)
1736 The number of scalar move insns which should be generated instead
1737 of a string move insn or a library call. Increasing the value
1738 will always make code faster, but eventually incurs high cost in
1739 increased code size.
1741 If you don't define this, a reasonable default is used. */
1743 #define NO_FUNCTION_CSE
1744 /* Define this macro if it is as good or better to call a constant
1745 function address than to call an address kept in a register. */
1747 #define NO_RECURSIVE_FUNCTION_CSE
1748 /* Define this macro if it is as good or better for a function to call
1749 itself with an explicit address than to call an address kept in a
1752 #define TEXT_SECTION_ASM_OP "\t.text"
1753 /* A C expression whose value is a string containing the assembler
1754 operation that should precede instructions and read-only data.
1755 Normally `"\t.text"' is right. */
1757 #define DATA_SECTION_ASM_OP "\t.data"
1758 /* A C expression whose value is a string containing the assembler
1759 operation to identify the following data as writable initialized
1760 data. Normally `"\t.data"' is right. */
1762 #define EXTRA_SECTIONS in_progmem
1763 /* A list of names for sections other than the standard two, which are
1764 `in_text' and `in_data'. You need not define this macro on a
1765 system with no other sections (that GCC needs to use). */
1767 #define EXTRA_SECTION_FUNCTIONS \
1770 progmem_section (void) \
1772 if (in_section != in_progmem) \
1774 fprintf (asm_out_file, \
1775 "\t.section .progmem.gcc_sw_table, \"%s\", @progbits\n", \
1776 AVR_MEGA ? "a" : "ax"); \
1777 /* Should already be aligned, this is just to be safe if it isn't. */ \
1778 fprintf (asm_out_file, "\t.p2align 1\n"); \
1779 in_section = in_progmem; \
1782 /* `EXTRA_SECTION_FUNCTIONS'
1783 One or more functions to be defined in `varasm.c'. These
1784 functions should do jobs analogous to those of `text_section' and
1785 `data_section', for your additional sections. Do not define this
1786 macro if you do not define `EXTRA_SECTIONS'. */
1788 #define READONLY_DATA_SECTION data_section
1789 /* On most machines, read-only variables, constants, and jump tables
1790 are placed in the text section. If this is not the case on your
1791 machine, this macro should be defined to be the name of a function
1792 (either `data_section' or a function defined in `EXTRA_SECTIONS')
1793 that switches to the section to be used for read-only items.
1795 If these items should be placed in the text section, this macro
1796 should not be defined. */
1798 /* `SELECT_SECTION (EXP, RELOC, ALIGN)'
1799 A C statement or statements to switch to the appropriate section
1800 for output of EXP. You can assume that EXP is either a `VAR_DECL'
1801 node or a constant of some sort. RELOC indicates whether the
1802 initial value of EXP requires link-time relocations. Select the
1803 section by calling `text_section' or one of the alternatives for
1806 Do not define this macro if you put all read-only variables and
1807 constants in the read-only data section (usually the text section). */
1809 /* `SELECT_RTX_SECTION (MODE, RTX, ALIGN)'
1810 A C statement or statements to switch to the appropriate section
1811 for output of RTX in mode MODE. You can assume that RTX is some
1812 kind of constant in RTL. The argument MODE is redundant except in
1813 the case of a `const_int' rtx. Select the section by calling
1814 `text_section' or one of the alternatives for other sections.
1816 Do not define this macro if you put all constants in the read-only
1819 #define JUMP_TABLES_IN_TEXT_SECTION 0
1820 /* Define this macro if jump tables (for `tablejump' insns) should be
1821 output in the text section, along with the assembler instructions.
1822 Otherwise, the readonly data section is used.
1824 This macro is irrelevant if there is no separate readonly data
1827 #define ENCODE_SECTION_INFO(DECL, FIRST) encode_section_info(DECL, FIRST)
1828 /* Define this macro if references to a symbol must be treated
1829 differently depending on something about the variable or function
1830 named by the symbol (such as what section it is in).
1832 The macro definition, if any, is executed immediately after the
1833 rtl for DECL has been created and stored in `DECL_RTL (DECL)'.
1834 The value of the rtl will be a `mem' whose address is a
1837 The usual thing for this macro to do is to record a flag in the
1838 `symbol_ref' (such as `SYMBOL_REF_FLAG') or to store a modified
1839 name string in the `symbol_ref' (if one bit is not enough
1842 #define STRIP_NAME_ENCODING(VAR,SYMBOL_NAME) \
1843 (VAR) = (SYMBOL_NAME) + ((SYMBOL_NAME)[0] == '*' || (SYMBOL_NAME)[0] == '@');
1844 /* `STRIP_NAME_ENCODING (VAR, SYM_NAME)'
1845 Decode SYM_NAME and store the real name part in VAR, sans the
1846 characters that encode section info. Define this macro if
1847 `ENCODE_SECTION_INFO' alters the symbol's name string. */
1849 #define UNIQUE_SECTION(DECL, RELOC) unique_section (DECL, RELOC)
1850 /* `UNIQUE_SECTION (DECL, RELOC)'
1851 A C statement to build up a unique section name, expressed as a
1852 STRING_CST node, and assign it to `DECL_SECTION_NAME (DECL)'.
1853 RELOC indicates whether the initial value of EXP requires
1854 link-time relocations. If you do not define this macro, GNU CC
1855 will use the symbol name prefixed by `.' as the section name. */
1857 #define ASM_FILE_START(STREAM) asm_file_start (STREAM)
1858 /* A C expression which outputs to the stdio stream STREAM some
1859 appropriate text to go at the start of an assembler file.
1861 Normally this macro is defined to output a line containing
1862 `#NO_APP', which is a comment that has no effect on most
1863 assemblers but tells the GNU assembler that it can save time by not
1864 checking for certain assembler constructs.
1866 On systems that use SDB, it is necessary to output certain
1867 commands; see `attasm.h'. */
1869 #define ASM_FILE_END(STREAM) asm_file_end (STREAM)
1870 /* A C expression which outputs to the stdio stream STREAM some
1871 appropriate text to go at the end of an assembler file.
1873 If this macro is not defined, the default is to output nothing
1874 special at the end of the file. Most systems don't require any
1877 On systems that use SDB, it is necessary to output certain
1878 commands; see `attasm.h'. */
1880 #define ASM_COMMENT_START " ; "
1881 /* A C string constant describing how to begin a comment in the target
1882 assembler language. The compiler assumes that the comment will
1883 end at the end of the line. */
1885 #define ASM_APP_ON "/* #APP */\n"
1886 /* A C string constant for text to be output before each `asm'
1887 statement or group of consecutive ones. Normally this is
1888 `"#APP"', which is a comment that has no effect on most assemblers
1889 but tells the GNU assembler that it must check the lines that
1890 follow for all valid assembler constructs. */
1892 #define ASM_APP_OFF "/* #NOAPP */\n"
1893 /* A C string constant for text to be output after each `asm'
1894 statement or group of consecutive ones. Normally this is
1895 `"#NO_APP"', which tells the GNU assembler to resume making the
1896 time-saving assumptions that are valid for ordinary compiler
1899 #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) fprintf (STREAM,"/* line: %d */\n",LINE)
1900 /* A C statement to output DBX or SDB debugging information before
1901 code for line number LINE of the current source file to the stdio
1904 This macro need not be defined if the standard form of debugging
1905 information for the debugger in use is appropriate. */
1907 /* Switch into a generic section. */
1908 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
1910 #define OBJC_PROLOGUE {}
1911 /* A C statement to output any assembler statements which are
1912 required to precede any Objective C object definitions or message
1913 sending. The statement is executed only when compiling an
1914 Objective C program. */
1917 #define ASM_OUTPUT_ASCII(FILE, P, SIZE) gas_output_ascii (FILE,P,SIZE)
1918 /* `ASM_OUTPUT_ASCII (STREAM, PTR, LEN)'
1919 output_ascii (FILE, P, SIZE)
1920 A C statement to output to the stdio stream STREAM an assembler
1921 instruction to assemble a string constant containing the LEN bytes
1922 at PTR. PTR will be a C expression of type `char *' and LEN a C
1923 expression of type `int'.
1925 If the assembler has a `.ascii' pseudo-op as found in the Berkeley
1926 Unix assembler, do not define the macro `ASM_OUTPUT_ASCII'. */
1928 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == '\n' \
1930 /* Define this macro as a C expression which is nonzero if C is used
1931 as a logical line separator by the assembler.
1933 If you do not define this macro, the default is that only the
1934 character `;' is treated as a logical line separator. */
1936 /* These macros are provided by `real.h' for writing the definitions of
1937 `ASM_OUTPUT_DOUBLE' and the like: */
1939 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \
1941 fputs ("\t.comm ", (STREAM)); \
1942 assemble_name ((STREAM), (NAME)); \
1943 fprintf ((STREAM), ",%d,1\n", (SIZE)); \
1945 /* A C statement (sans semicolon) to output to the stdio stream
1946 STREAM the assembler definition of a common-label named NAME whose
1947 size is SIZE bytes. The variable ROUNDED is the size rounded up
1948 to whatever alignment the caller wants.
1950 Use the expression `assemble_name (STREAM, NAME)' to output the
1951 name itself; before and after that, output the additional
1952 assembler syntax for defining the name, and a newline.
1954 This macro controls how the assembler definitions of uninitialized
1955 common global variables are output. */
1957 #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) \
1959 fputs ("\t.lcomm ", (STREAM)); \
1960 assemble_name ((STREAM), (NAME)); \
1961 fprintf ((STREAM), ",%d\n", (SIZE)); \
1963 /* A C statement (sans semicolon) to output to the stdio stream
1964 STREAM the assembler definition of a local-common-label named NAME
1965 whose size is SIZE bytes. The variable ROUNDED is the size
1966 rounded up to whatever alignment the caller wants.
1968 Use the expression `assemble_name (STREAM, NAME)' to output the
1969 name itself; before and after that, output the additional
1970 assembler syntax for defining the name, and a newline.
1972 This macro controls how the assembler definitions of uninitialized
1973 static variables are output. */
1975 #define ASM_OUTPUT_LABEL(STREAM, NAME) \
1977 assemble_name (STREAM, NAME); \
1978 fprintf (STREAM, ":\n"); \
1980 /* A C statement (sans semicolon) to output to the stdio stream
1981 STREAM the assembler definition of a label named NAME. Use the
1982 expression `assemble_name (STREAM, NAME)' to output the name
1983 itself; before and after that, output the additional assembler
1984 syntax for defining the name, and a newline. */
1989 #define TYPE_ASM_OP "\t.type\t"
1990 #define SIZE_ASM_OP "\t.size\t"
1991 #define WEAK_ASM_OP "\t.weak\t"
1992 /* Define the strings used for the special svr4 .type and .size directives.
1993 These strings generally do not vary from one system running svr4 to
1994 another, but if a given system (e.g. m88k running svr) needs to use
1995 different pseudo-op names for these, they may be overridden in the
1996 file which includes this one. */
1999 #undef TYPE_OPERAND_FMT
2000 #define TYPE_OPERAND_FMT "@%s"
2001 /* The following macro defines the format used to output the second
2002 operand of the .type assembler directive. Different svr4 assemblers
2003 expect various different forms for this operand. The one given here
2004 is just a default. You may need to override it in your machine-
2005 specific tm.h file (depending upon the particulars of your assembler). */
2008 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
2010 fprintf (FILE, "%s", TYPE_ASM_OP); \
2011 assemble_name (FILE, NAME); \
2013 fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
2014 putc ('\n', FILE); \
2015 ASM_OUTPUT_LABEL (FILE, NAME); \
2017 /* A C statement (sans semicolon) to output to the stdio stream
2018 STREAM any text necessary for declaring the name NAME of a
2019 function which is being defined. This macro is responsible for
2020 outputting the label definition (perhaps using
2021 `ASM_OUTPUT_LABEL'). The argument DECL is the `FUNCTION_DECL'
2022 tree node representing the function.
2024 If this macro is not defined, then the function name is defined in
2025 the usual manner as a label (by means of `ASM_OUTPUT_LABEL'). */
2027 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
2029 if (!flag_inhibit_size_directive) \
2032 static int labelno; \
2034 ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \
2035 ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \
2036 fprintf (FILE, "%s", SIZE_ASM_OP); \
2037 assemble_name (FILE, (FNAME)); \
2038 fprintf (FILE, ","); \
2039 assemble_name (FILE, label); \
2040 fprintf (FILE, "-"); \
2041 assemble_name (FILE, (FNAME)); \
2042 putc ('\n', FILE); \
2045 /* A C statement (sans semicolon) to output to the stdio stream
2046 STREAM any text necessary for declaring the size of a function
2047 which is being defined. The argument NAME is the name of the
2048 function. The argument DECL is the `FUNCTION_DECL' tree node
2049 representing the function.
2051 If this macro is not defined, then the function size is not
2054 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
2056 fprintf (FILE, "%s", TYPE_ASM_OP); \
2057 assemble_name (FILE, NAME); \
2059 fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
2060 putc ('\n', FILE); \
2061 size_directive_output = 0; \
2062 if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
2064 size_directive_output = 1; \
2065 fprintf (FILE, "%s", SIZE_ASM_OP); \
2066 assemble_name (FILE, NAME); \
2067 fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
2069 ASM_OUTPUT_LABEL(FILE, NAME); \
2071 /* A C statement (sans semicolon) to output to the stdio stream
2072 STREAM any text necessary for declaring the name NAME of an
2073 initialized variable which is being defined. This macro must
2074 output the label definition (perhaps using `ASM_OUTPUT_LABEL').
2075 The argument DECL is the `VAR_DECL' tree node representing the
2078 If this macro is not defined, then the variable name is defined in
2079 the usual manner as a label (by means of `ASM_OUTPUT_LABEL'). */
2081 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
2083 const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
2084 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
2085 && ! AT_END && TOP_LEVEL \
2086 && DECL_INITIAL (DECL) == error_mark_node \
2087 && !size_directive_output) \
2089 size_directive_output = 1; \
2090 fprintf (FILE, "%s", SIZE_ASM_OP); \
2091 assemble_name (FILE, name); \
2092 fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
2095 /* A C statement (sans semicolon) to finish up declaring a variable
2096 name once the compiler has processed its initializer fully and
2097 thus has had a chance to determine the size of an array when
2098 controlled by an initializer. This is used on systems where it's
2099 necessary to declare something about the size of the object.
2101 If you don't define this macro, that is equivalent to defining it
2106 "\1\1\1\1\1\1\1\1btn\1fr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
2107 \0\0\"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
2108 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\\\0\0\0\
2109 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\
2110 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
2111 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
2112 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
2113 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1"
2114 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
2115 ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table
2116 corresponds to a particular byte value [0..255]. For any
2117 given byte value, if the value in the corresponding table
2118 position is zero, the given character can be output directly.
2119 If the table value is 1, the byte must be output as a \ooo
2120 octal escape. If the tables value is anything else, then the
2121 byte value should be output as a \ followed by the value
2122 in the table. Note that we can use standard UN*X escape
2123 sequences for many control characters, but we don't use
2124 \a to represent BEL because some svr4 assemblers (e.g. on
2125 the i386) don't know about that. Also, we don't use \v
2126 since some versions of gas, such as 2.2 did not accept it. */
2128 #define STRING_LIMIT ((unsigned) 64)
2129 #define STRING_ASM_OP "\t.string\t"
2130 /* Some svr4 assemblers have a limit on the number of characters which
2131 can appear in the operand of a .string directive. If your assembler
2132 has such a limitation, you should define STRING_LIMIT to reflect that
2133 limit. Note that at least some svr4 assemblers have a limit on the
2134 actual number of bytes in the double-quoted string, and that they
2135 count each character in an escape sequence as one byte. Thus, an
2136 escape sequence like \377 would count as four bytes.
2138 If your target assembler doesn't support the .string directive, you
2139 should define this to zero. */
2141 #define ASM_GLOBALIZE_LABEL(STREAM, NAME) \
2143 fprintf (STREAM, ".global\t"); \
2144 assemble_name (STREAM, NAME); \
2145 fprintf (STREAM, "\n"); \
2149 /* A C statement (sans semicolon) to output to the stdio stream
2150 STREAM some commands that will make the label NAME global; that
2151 is, available for reference from other files. Use the expression
2152 `assemble_name (STREAM, NAME)' to output the name itself; before
2153 and after that, output the additional assembler syntax for making
2154 that name global, and a newline. */
2156 #define ASM_WEAKEN_LABEL(FILE, NAME) \
2159 fputs ("\t.weak\t", (FILE)); \
2160 assemble_name ((FILE), (NAME)); \
2161 fputc ('\n', (FILE)); \
2165 /* A C statement (sans semicolon) to output to the stdio stream
2166 STREAM some commands that will make the label NAME weak; that is,
2167 available for reference from other files but only used if no other
2168 definition is available. Use the expression `assemble_name
2169 (STREAM, NAME)' to output the name itself; before and after that,
2170 output the additional assembler syntax for making that name weak,
2173 If you don't define this macro, GNU CC will not support weak
2174 symbols and you should not define the `SUPPORTS_WEAK' macro.
2177 #define SUPPORTS_WEAK 1
2178 /* A C expression which evaluates to true if the target supports weak
2181 If you don't define this macro, `defaults.h' provides a default
2182 definition. If `ASM_WEAKEN_LABEL' is defined, the default
2183 definition is `1'; otherwise, it is `0'. Define this macro if you
2184 want to control weak symbol support with a compiler flag such as
2187 `MAKE_DECL_ONE_ONLY'
2188 A C statement (sans semicolon) to mark DECL to be emitted as a
2189 public symbol such that extra copies in multiple translation units
2190 will be discarded by the linker. Define this macro if your object
2191 file format provides support for this concept, such as the `COMDAT'
2192 section flags in the Microsoft Windows PE/COFF format, and this
2193 support requires changes to DECL, such as putting it in a separate
2197 A C expression which evaluates to true if the target supports
2200 If you don't define this macro, `varasm.c' provides a default
2201 definition. If `MAKE_DECL_ONE_ONLY' is defined, the default
2202 definition is `1'; otherwise, it is `0'. Define this macro if you
2203 want to control weak symbol support with a compiler flag, or if
2204 setting the `DECL_ONE_ONLY' flag is enough to mark a declaration to
2205 be emitted as one-only. */
2207 #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) \
2208 fprintf(STREAM, ".%s%d:\n", PREFIX, NUM)
2209 /* A C statement to output to the stdio stream STREAM a label whose
2210 name is made from the string PREFIX and the number NUM.
2212 It is absolutely essential that these labels be distinct from the
2213 labels used for user-level functions and variables. Otherwise,
2214 certain programs will have name conflicts with internal labels.
2216 It is desirable to exclude internal labels from the symbol table
2217 of the object file. Most assemblers have a naming convention for
2218 labels that should be excluded; on many systems, the letter `L' at
2219 the beginning of a label has this effect. You should find out what
2220 convention your system uses, and follow it.
2222 The usual definition of this macro is as follows:
2224 fprintf (STREAM, "L%s%d:\n", PREFIX, NUM) */
2226 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM) \
2227 sprintf (STRING, "*.%s%d", PREFIX, NUM)
2228 /* A C statement to store into the string STRING a label whose name
2229 is made from the string PREFIX and the number NUM.
2231 This string, when output subsequently by `assemble_name', should
2232 produce the output that `ASM_OUTPUT_INTERNAL_LABEL' would produce
2233 with the same PREFIX and NUM.
2235 If the string begins with `*', then `assemble_name' will output
2236 the rest of the string unchanged. It is often convenient for
2237 `ASM_GENERATE_INTERNAL_LABEL' to use `*' in this way. If the
2238 string doesn't start with `*', then `ASM_OUTPUT_LABELREF' gets to
2239 output the string, and may change it. (Of course,
2240 `ASM_OUTPUT_LABELREF' is also part of your machine description, so
2241 you should know what it does on your machine.) */
2243 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
2244 ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \
2245 sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
2247 /* A C expression to assign to OUTVAR (which is a variable of type
2248 `char *') a newly allocated string made from the string NAME and
2249 the number NUMBER, with some suitable punctuation added. Use
2250 `alloca' to get space for the string.
2252 The string will be used as an argument to `ASM_OUTPUT_LABELREF' to
2253 produce an assembler label for an internal static variable whose
2254 name is NAME. Therefore, the string must be such as to result in
2255 valid assembler code. The argument NUMBER is different each time
2256 this macro is executed; it prevents conflicts between
2257 similarly-named internal static variables in different scopes.
2259 Ideally this string should not be a valid C identifier, to prevent
2260 any conflict with the user's own symbols. Most assemblers allow
2261 periods or percent signs in assembler symbols; putting at least
2262 one of these between the name and the number will suffice. */
2264 /* `ASM_OUTPUT_WEAK_ALIAS (STREAM, NAME, VALUE)'
2265 A C statement to output to the stdio stream STREAM assembler code
2266 which defines (equates) the weak symbol NAME to have the value
2269 Define this macro if the target only supports weak aliases; define
2270 ASM_OUTPUT_DEF instead if possible. */
2272 #define HAS_INIT_SECTION 1
2273 /* If defined, `main' will not call `__main' as described above.
2274 This macro should be defined for systems that control the contents
2275 of the init section on a symbol-by-symbol basis, such as OSF/1,
2276 and should not be defined explicitly for systems that support
2277 `INIT_SECTION_ASM_OP'. */
2279 #define REGISTER_NAMES { \
2280 "r0","r1","r2","r3","r4","r5","r6","r7", \
2281 "r8","r9","r10","r11","r12","r13","r14","r15", \
2282 "r16","r17","r18","r19","r20","r21","r22","r23", \
2283 "r24","r25","r26","r27","r28","r29","r30","r31", \
2284 "__SPL__","__SPH__","argL","argH"}
2285 /* A C initializer containing the assembler's names for the machine
2286 registers, each one as a C string constant. This is what
2287 translates register numbers in the compiler into assembler
2290 #define FINAL_PRESCAN_INSN(insn, operand, nop) final_prescan_insn (insn, operand,nop)
2291 /* If defined, a C statement to be executed just prior to the output
2292 of assembler code for INSN, to modify the extracted operands so
2293 they will be output differently.
2295 Here the argument OPVEC is the vector containing the operands
2296 extracted from INSN, and NOPERANDS is the number of elements of
2297 the vector which contain meaningful data for this insn. The
2298 contents of this vector are what will be used to convert the insn
2299 template into assembler code, so you can change the assembler
2300 output by changing the contents of the vector.
2302 This macro is useful when various assembler syntaxes share a single
2303 file of instruction patterns; by defining this macro differently,
2304 you can cause a large class of instructions to be output
2305 differently (such as with rearranged operands). Naturally,
2306 variations in assembler syntax affecting individual insn patterns
2307 ought to be handled by writing conditional output routines in
2310 If this macro is not defined, it is equivalent to a null statement. */
2312 #define PRINT_OPERAND(STREAM, X, CODE) print_operand (STREAM, X, CODE)
2313 /* A C compound statement to output to stdio stream STREAM the
2314 assembler syntax for an instruction operand X. X is an RTL
2317 CODE is a value that can be used to specify one of several ways of
2318 printing the operand. It is used when identical operands must be
2319 printed differently depending on the context. CODE comes from the
2320 `%' specification that was used to request printing of the
2321 operand. If the specification was just `%DIGIT' then CODE is 0;
2322 if the specification was `%LTR DIGIT' then CODE is the ASCII code
2325 If X is a register, this macro should print the register's name.
2326 The names can be found in an array `reg_names' whose type is `char
2327 *[]'. `reg_names' is initialized from `REGISTER_NAMES'.
2329 When the machine description has a specification `%PUNCT' (a `%'
2330 followed by a punctuation character), this macro is called with a
2331 null pointer for X and the punctuation character for CODE. */
2333 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '~')
2334 /* A C expression which evaluates to true if CODE is a valid
2335 punctuation character for use in the `PRINT_OPERAND' macro. If
2336 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no
2337 punctuation characters (except for the standard one, `%') are used
2340 #define PRINT_OPERAND_ADDRESS(STREAM, X) print_operand_address(STREAM, X)
2341 /* A C compound statement to output to stdio stream STREAM the
2342 assembler syntax for an instruction operand that is a memory
2343 reference whose address is X. X is an RTL expression.
2345 On some machines, the syntax for a symbolic address depends on the
2346 section that the address refers to. On these machines, define the
2347 macro `ENCODE_SECTION_INFO' to store the information into the
2348 `symbol_ref', and then check for it here. *Note Assembler
2351 #define USER_LABEL_PREFIX ""
2352 /* `LOCAL_LABEL_PREFIX'
2355 If defined, C string expressions to be used for the `%R', `%L',
2356 `%U', and `%I' options of `asm_fprintf' (see `final.c'). These
2357 are useful when a single `md' file must support multiple assembler
2358 formats. In that case, the various `tm.h' files can define these
2359 macros differently. */
2361 #define ASSEMBLER_DIALECT AVR_ENHANCED
2362 /* If your target supports multiple dialects of assembler language
2363 (such as different opcodes), define this macro as a C expression
2364 that gives the numeric index of the assembler language dialect to
2365 use, with zero as the first variant.
2367 If this macro is defined, you may use constructs of the form
2368 `{option0|option1|option2...}' in the output templates of patterns
2369 (*note Output Template::.) or in the first argument of
2370 `asm_fprintf'. This construct outputs `option0', `option1' or
2371 `option2', etc., if the value of `ASSEMBLER_DIALECT' is zero, one
2372 or two, etc. Any special characters within these strings retain
2373 their usual meaning.
2375 If you do not define this macro, the characters `{', `|' and `}'
2376 do not have any special meaning when used in templates or operands
2379 Define the macros `REGISTER_PREFIX', `LOCAL_LABEL_PREFIX',
2380 `USER_LABEL_PREFIX' and `IMMEDIATE_PREFIX' if you can express the
2381 variations in assembler language syntax with that mechanism.
2382 Define `ASSEMBLER_DIALECT' and use the `{option0|option1}' syntax
2383 if the syntax variant are larger and involve such things as
2384 different opcodes or operand order. */
2386 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \
2390 fprintf (STREAM, "\tpush\tr%d", REGNO); \
2392 /* A C expression to output to STREAM some assembler code which will
2393 push hard register number REGNO onto the stack. The code need not
2394 be optimal, since this macro is used only when profiling. */
2396 #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \
2400 fprintf (STREAM, "\tpop\tr%d", REGNO); \
2402 /* A C expression to output to STREAM some assembler code which will
2403 pop hard register number REGNO off of the stack. The code need
2404 not be optimal, since this macro is used only when profiling. */
2406 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
2407 avr_output_addr_vec_elt(STREAM, VALUE)
2408 /* This macro should be provided on machines where the addresses in a
2409 dispatch table are absolute.
2411 The definition should be a C statement to output to the stdio
2412 stream STREAM an assembler pseudo-instruction to generate a
2413 reference to a label. VALUE is the number of an internal label
2414 whose definition is output using `ASM_OUTPUT_INTERNAL_LABEL'. For
2417 fprintf (STREAM, "\t.word L%d\n", VALUE) */
2419 #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) \
2420 progmem_section (), ASM_OUTPUT_INTERNAL_LABEL (STREAM, PREFIX, NUM)
2422 /* `ASM_OUTPUT_CASE_LABEL (STREAM, PREFIX, NUM, TABLE)'
2423 Define this if the label before a jump-table needs to be output
2424 specially. The first three arguments are the same as for
2425 `ASM_OUTPUT_INTERNAL_LABEL'; the fourth argument is the jump-table
2426 which follows (a `jump_insn' containing an `addr_vec' or
2429 This feature is used on system V to output a `swbeg' statement for
2432 If this macro is not defined, these labels are output with
2433 `ASM_OUTPUT_INTERNAL_LABEL'. */
2435 /* `ASM_OUTPUT_CASE_END (STREAM, NUM, TABLE)'
2436 Define this if something special must be output at the end of a
2437 jump-table. The definition should be a C statement to be executed
2438 after the assembler code for the table is written. It should write
2439 the appropriate code to stdio stream STREAM. The argument TABLE
2440 is the jump-table insn, and NUM is the label-number of the
2443 If this macro is not defined, nothing special is output at the end
2444 of the jump-table. */
2446 #define ASM_OUTPUT_SKIP(STREAM, N) \
2447 fprintf (STREAM, "\t.skip %d,0\n", N)
2448 /* A C statement to output to the stdio stream STREAM an assembler
2449 instruction to advance the location counter by NBYTES bytes.
2450 Those bytes should be zero when loaded. NBYTES will be a C
2451 expression of type `int'. */
2453 #define ASM_OUTPUT_ALIGN(STREAM, POWER)
2454 /* A C statement to output to the stdio stream STREAM an assembler
2455 command to advance the location counter to a multiple of 2 to the
2456 POWER bytes. POWER will be a C expression of type `int'. */
2458 #define CASE_VECTOR_MODE HImode
2459 /* An alias for a machine mode name. This is the machine mode that
2460 elements of a jump-table should have. */
2462 extern int avr_case_values_threshold;
2464 #define CASE_VALUES_THRESHOLD avr_case_values_threshold
2465 /* `CASE_VALUES_THRESHOLD'
2466 Define this to be the smallest number of different values for
2467 which it is best to use a jump-table instead of a tree of
2468 conditional branches. The default is four for machines with a
2469 `casesi' instruction and five otherwise. This is best for most
2472 #undef WORD_REGISTER_OPERATIONS
2473 /* Define this macro if operations between registers with integral
2474 mode smaller than a word are always performed on the entire
2475 register. Most RISC machines have this property and most CISC
2479 /* The maximum number of bytes that a single instruction can move
2480 quickly between memory and registers or between two memory
2483 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
2484 /* A C expression which is nonzero if on this machine it is safe to
2485 "convert" an integer of INPREC bits to one of OUTPREC bits (where
2486 OUTPREC is smaller than INPREC) by merely operating on it as if it
2487 had only OUTPREC bits.
2489 On many machines, this expression can be 1.
2491 When `TRULY_NOOP_TRUNCATION' returns 1 for a pair of sizes for
2492 modes for which `MODES_TIEABLE_P' is 0, suboptimal code can result.
2493 If this is the case, making `TRULY_NOOP_TRUNCATION' return 0 in
2494 such cases may improve things. */
2496 #define Pmode HImode
2497 /* An alias for the machine mode for pointers. On most machines,
2498 define this to be the integer mode corresponding to the width of a
2499 hardware pointer; `SImode' on 32-bit machine or `DImode' on 64-bit
2500 machines. On some machines you must define this to be one of the
2501 partial integer modes, such as `PSImode'.
2503 The width of `Pmode' must be at least as large as the value of
2504 `POINTER_SIZE'. If it is not equal, you must define the macro
2505 `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to
2508 #define FUNCTION_MODE HImode
2509 /* An alias for the machine mode used for memory references to
2510 functions being called, in `call' RTL expressions. On most
2511 machines this should be `QImode'. */
2513 #define INTEGRATE_THRESHOLD(DECL) (1 + (3 * list_length (DECL_ARGUMENTS (DECL)) / 2))
2515 /* A C expression for the maximum number of instructions above which
2516 the function DECL should not be inlined. DECL is a
2517 `FUNCTION_DECL' node.
2519 The default definition of this macro is 64 plus 8 times the number
2520 of arguments that the function accepts. Some people think a larger
2521 threshold should be used on RISC machines. */
2523 #define DOLLARS_IN_IDENTIFIERS 0
2524 /* Define this macro to control use of the character `$' in identifier
2525 names. 0 means `$' is not allowed by default; 1 means it is
2526 allowed. 1 is the default; there is no need to define this macro
2527 in that case. This macro controls the compiler proper; it does
2528 not affect the preprocessor. */
2530 #define NO_DOLLAR_IN_LABEL 1
2531 /* Define this macro if the assembler does not accept the character
2532 `$' in label names. By default constructors and destructors in
2533 G++ have `$' in the identifiers. If this macro is defined, `.' is
2536 #define MACHINE_DEPENDENT_REORG(INSN) machine_dependent_reorg (INSN)
2537 /* In rare cases, correct code generation requires extra machine
2538 dependent processing between the second jump optimization pass and
2539 delayed branch scheduling. On those machines, define this macro
2540 as a C statement to act on the code starting at INSN. */
2542 #define GIV_SORT_CRITERION(X, Y) \
2543 if (GET_CODE ((X)->add_val) == CONST_INT \
2544 && GET_CODE ((Y)->add_val) == CONST_INT) \
2545 return INTVAL ((X)->add_val) - INTVAL ((Y)->add_val);
2547 /* `GIV_SORT_CRITERION(GIV1, GIV2)'
2548 In some cases, the strength reduction optimization pass can
2549 produce better code if this is defined. This macro controls the
2550 order that induction variables are combined. This macro is
2551 particularly useful if the target has limited addressing modes.
2552 For instance, the SH target has only positive offsets in
2553 addresses. Thus sorting to put the smallest address first allows
2554 the most combinations to be found. */
2556 #define TRAMPOLINE_TEMPLATE(FILE) \
2557 internal_error ("trampolines not supported")
2559 /* Length in units of the trampoline for entering a nested function. */
2561 #define TRAMPOLINE_SIZE 4
2563 /* Emit RTL insns to initialize the variable parts of a trampoline.
2564 FNADDR is an RTX for the address of the function's pure code.
2565 CXT is an RTX for the static chain value for the function. */
2567 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
2569 emit_move_insn (gen_rtx (MEM, HImode, plus_constant ((TRAMP), 2)), CXT); \
2570 emit_move_insn (gen_rtx (MEM, HImode, plus_constant ((TRAMP), 6)), FNADDR); \
2572 /* Store in cc_status the expressions
2573 that the condition codes will describe
2574 after execution of an instruction whose pattern is EXP.
2575 Do not alter them if the instruction would not alter the cc's. */
2577 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
2579 /* The add insns don't set overflow in a usable way. */
2580 #define CC_OVERFLOW_UNUSABLE 01000
2581 /* The mov,and,or,xor insns don't set carry. That's ok though as the
2582 Z bit is all we need when doing unsigned comparisons on the result of
2583 these insns (since they're always with 0). However, conditions.h has
2584 CC_NO_OVERFLOW defined for this purpose. Rename it to something more
2586 #define CC_NO_CARRY CC_NO_OVERFLOW
2589 /* Output assembler code to FILE to increment profiler label # LABELNO
2590 for profiling a function entry. */
2592 #define FUNCTION_PROFILER(FILE, LABELNO) \
2593 fprintf (FILE, "/* profiler %d */", (LABELNO))
2595 /* `FIRST_INSN_ADDRESS'
2596 When the `length' insn attribute is used, this macro specifies the
2597 value to be assigned to the address of the first insn in a
2598 function. If not specified, 0 is used. */
2600 #define ADJUST_INSN_LENGTH(INSN, LENGTH) (LENGTH =\
2601 adjust_insn_length (INSN, LENGTH))
2602 /* If defined, modifies the length assigned to instruction INSN as a
2603 function of the context in which it is used. LENGTH is an lvalue
2604 that contains the initially computed length of the insn and should
2605 be updated with the correct length of the insn. If updating is
2606 required, INSN must not be a varying-length insn.
2608 This macro will normally not be required. A case in which it is
2609 required is the ROMP. On this machine, the size of an `addr_vec'
2610 insn must be increased by two to compensate for the fact that
2611 alignment may be required. */
2613 #define TARGET_MEM_FUNCTIONS
2614 /* Define this macro if GNU CC should generate calls to the System V
2615 (and ANSI C) library functions `memcpy' and `memset' rather than
2616 the BSD functions `bcopy' and `bzero'. */
2619 %{!mmcu*|mmcu=avr2:%(cpp_avr2)} \
2620 %{mmcu=at90s2313:%(cpp_avr2) -D__AVR_AT90S2313__} \
2621 %{mmcu=at90s2323:%(cpp_avr2) -D__AVR_AT90S2323__} \
2622 %{mmcu=at90s2333:%(cpp_avr2) -D__AVR_AT90S2333__} \
2623 %{mmcu=at90s2343:%(cpp_avr2) -D__AVR_AT90S2343__} \
2624 %{mmcu=attiny22: %(cpp_avr2) -D__AVR_ATtiny22__} \
2625 %{mmcu=at90s4433:%(cpp_avr2) -D__AVR_AT90S4433__} \
2626 %{mmcu=at90s4414:%(cpp_avr2) -D__AVR_AT90S4414__} \
2627 %{mmcu=at90s4434:%(cpp_avr2) -D__AVR_AT90S4434__} \
2628 %{mmcu=at90s8515:%(cpp_avr2) -D__AVR_AT90S8515__} \
2629 %{mmcu=at90s8535:%(cpp_avr2) -D__AVR_AT90S8535__} \
2630 %{mmcu=at90c8534:%(cpp_avr2) -D__AVR_AT90C8534__} \
2631 %{mmcu=avr3:%(cpp_avr3)} \
2632 %{mmcu=atmega603:%(cpp_avr3) -D__AVR_ATmega603__} \
2633 %{mmcu=atmega103:%(cpp_avr3) -D__AVR_ATmega103__} \
2634 %{mmcu=at43usb320:%(cpp_avr3) -D__AVR_AT43USB320__} \
2635 %{mmcu=at76c711: %(cpp_avr3) -D__AVR_AT76C711__} \
2636 %{mmcu=avr4:%(cpp_avr4)} \
2637 %{mmcu=atmega8: %(cpp_avr4) -D__AVR_ATmega8__} \
2638 %{mmcu=atmega83: %(cpp_avr4) -D__AVR_ATmega83__} \
2639 %{mmcu=atmega85: %(cpp_avr4) -D__AVR_ATmega85__} \
2640 %{mmcu=avr5:%(cpp_avr5)} \
2641 %{mmcu=atmega16: %(cpp_avr5) -D__AVR_ATmega16__} \
2642 %{mmcu=atmega161:%(cpp_avr5) -D__AVR_ATmega161__} \
2643 %{mmcu=atmega163:%(cpp_avr5) -D__AVR_ATmega163__} \
2644 %{mmcu=atmega32: %(cpp_avr5) -D__AVR_ATmega32__} \
2645 %{mmcu=atmega323:%(cpp_avr5) -D__AVR_ATmega323__} \
2646 %{mmcu=atmega64: %(cpp_avr5) -D__AVR_ATmega64__} \
2647 %{mmcu=atmega128:%(cpp_avr5) -D__AVR_ATmega128__} \
2648 %{mmcu=at43usb355:%(cpp_avr5) -D__AVR_AT43USB355__} \
2649 %{mmcu=at94k: %(cpp_avr5) -D__AVR_AT94K__} \
2650 %{mmcu=avr1:%(cpp_avr1)} \
2651 %{mmcu=at90s1200:%(cpp_avr1) -D__AVR_AT90S1200__} \
2652 %{mmcu=attiny10|mmcu=attiny11: %(cpp_avr1) -D__AVR_ATtiny11__} \
2653 %{mmcu=attiny12: %(cpp_avr1) -D__AVR_ATtiny12__} \
2654 %{mmcu=attiny15: %(cpp_avr1) -D__AVR_ATtiny15__} \
2655 %{mmcu=attiny28: %(cpp_avr1) -D__AVR_ATtiny28__} \
2656 %{mno-interrupts:-D__NO_INTERRUPTS__} \
2657 %{mint8:-D__SIZE_TYPE__=long\\ unsigned\\ int -D__PTRDIFF_TYPE__=long -D__INT_MAX__=127} \
2658 %{!mint*:-D__SIZE_TYPE__=unsigned\\ int -D__PTRDIFF_TYPE__=int -D__INT_MAX__=32767} \
2659 %{posix:-D_POSIX_SOURCE}"
2660 /* A C string constant that tells the GNU CC driver program options to
2661 pass to CPP. It can also specify how to translate options you
2662 give to GNU CC into options for GNU CC to pass to the CPP.
2664 Do not define this macro if it does not need to do anything. */
2666 #define NO_BUILTIN_SIZE_TYPE
2667 /* If this macro is defined, the preprocessor will not define the
2668 builtin macro `__SIZE_TYPE__'. The macro `__SIZE_TYPE__' must
2669 then be defined by `CPP_SPEC' instead.
2671 This should be defined if `SIZE_TYPE' depends on target dependent
2672 flags which are not accessible to the preprocessor. Otherwise, it
2673 should not be defined. */
2675 #define NO_BUILTIN_PTRDIFF_TYPE
2676 /* If this macro is defined, the preprocessor will not define the
2677 builtin macro `__PTRDIFF_TYPE__'. The macro `__PTRDIFF_TYPE__'
2678 must then be defined by `CPP_SPEC' instead.
2680 This should be defined if `PTRDIFF_TYPE' depends on target
2681 dependent flags which are not accessible to the preprocessor.
2682 Otherwise, it should not be defined. */
2684 #define CC1_SPEC "%{profile:-p}"
2685 /* A C string constant that tells the GNU CC driver program options to
2686 pass to `cc1'. It can also specify how to translate options you
2687 give to GNU CC into options for GNU CC to pass to the `cc1'.
2689 Do not define this macro if it does not need to do anything. */
2691 #define ASM_SPEC "%{mmcu=*:-mmcu=%*}"
2692 /* A C string constant that tells the GNU CC driver program options to
2693 pass to the assembler. It can also specify how to translate
2694 options you give to GNU CC into options for GNU CC to pass to the
2695 assembler. See the file `sun3.h' for an example of this.
2697 Do not define this macro if it does not need to do anything. */
2699 #define ASM_FINAL_SPEC ""
2700 /* A C string constant that tells the GNU CC driver program how to
2701 run any programs which cleanup after the normal assembler.
2702 Normally, this is not needed. See the file `mips.h' for an
2705 Do not define this macro if it does not need to do anything. */
2707 #define LINK_SPEC "\
2708 %{!mmcu*:-m avr85xx} \
2709 %{mmcu=atmega603:-m avrmega603} \
2710 %{mmcu=atmega103:-m avrmega103} \
2711 %{mmcu=at43usb320:-m avr3} \
2712 %{mmcu=at76c711:-m avr3} \
2713 %{mmcu=atmega16:-m avrmega161} \
2714 %{mmcu=atmega161:-m avrmega161} \
2715 %{mmcu=atmega163:-m avrmega161} \
2716 %{mmcu=atmega32:-m avr5} \
2717 %{mmcu=atmega323:-m avr5} \
2718 %{mmcu=atmega64:-m avr5} \
2719 %{mmcu=atmega128:-m avr5} \
2720 %{mmcu=at43usb355:-m avr5} \
2721 %{mmcu=at94k:-m avr5} \
2722 %{mmcu=atmega8:-m avr4} \
2723 %{mmcu=atmega83:-m avr4} \
2724 %{mmcu=atmega85:-m avr4} \
2725 %{mmcu=at90s1200|mmcu=attiny1*:-m avr1200} \
2726 %{mmcu=attiny28:-m avr1} \
2727 %{mmcu=at90s2313:-m avr23xx} \
2728 %{mmcu=at90s2323:-m avr23xx} \
2729 %{mmcu=attiny22:-m avr23xx} \
2730 %{mmcu=at90s2333:-m avr23xx} \
2731 %{mmcu=at90s2343:-m avr23xx} \
2732 %{mmcu=at90s4433:-m avr4433} \
2733 %{mmcu=at90s4414:-m avr44x4} \
2734 %{mmcu=at90s4434:-m avr44x4} \
2735 %{mmcu=at90c8534:-m avr85xx} \
2736 %{mmcu=at90s8535:-m avr85xx} \
2737 %{mmcu=at90s8515:-m avr85xx}"
2739 /* A C string constant that tells the GNU CC driver program options to
2740 pass to the linker. It can also specify how to translate options
2741 you give to GNU CC into options for GNU CC to pass to the linker.
2743 Do not define this macro if it does not need to do anything. */
2746 "%{!mmcu=at90s1*:%{!mmcu=attiny1*:%{!mmcu=attiny28: -lc }}}"
2747 /* Another C string constant used much like `LINK_SPEC'. The
2748 difference between the two is that `LIB_SPEC' is used at the end
2749 of the command given to the linker.
2751 If this macro is not defined, a default is provided that loads the
2752 standard C library from the usual place. See `gcc.c'. */
2754 #define LIBGCC_SPEC \
2755 "%{!mmcu=at90s1*:%{!mmcu=attiny1*:%{!mmcu=attiny28: -lgcc }}}"
2756 /* Another C string constant that tells the GNU CC driver program how
2757 and when to place a reference to `libgcc.a' into the linker
2758 command line. This constant is placed both before and after the
2759 value of `LIB_SPEC'.
2761 If this macro is not defined, the GNU CC driver provides a default
2762 that passes the string `-lgcc' to the linker unless the `-shared'
2763 option is specified. */
2765 #define STARTFILE_SPEC "%(crt_binutils)"
2766 /* Another C string constant used much like `LINK_SPEC'. The
2767 difference between the two is that `STARTFILE_SPEC' is used at the
2768 very beginning of the command given to the linker.
2770 If this macro is not defined, a default is provided that loads the
2771 standard C startup file from the usual place. See `gcc.c'. */
2773 #define ENDFILE_SPEC ""
2774 /* Another C string constant used much like `LINK_SPEC'. The
2775 difference between the two is that `ENDFILE_SPEC' is used at the
2776 very end of the command given to the linker.
2778 Do not define this macro if it does not need to do anything. */
2780 #define CRT_BINUTILS_SPECS "\
2781 %{mmcu=at90s1200|mmcu=avr1:crts1200.o%s} \
2782 %{mmcu=attiny10|mmcu=attiny11:crttn11.o%s} \
2783 %{mmcu=attiny12:crttn12.o%s} \
2784 %{mmcu=attiny15:crttn15.o%s} \
2785 %{mmcu=attiny28:crttn28.o%s} \
2786 %{!mmcu*|mmcu=at90s8515|mmcu=avr2:crts8515.o%s} \
2787 %{mmcu=at90s2313:crts2313.o%s} \
2788 %{mmcu=at90s2323:crts2323.o%s} \
2789 %{mmcu=attiny22:crttn22.o%s} \
2790 %{mmcu=at90s2333:crts2333.o%s} \
2791 %{mmcu=at90s2343:crts2343.o%s} \
2792 %{mmcu=at90s4433:crts4433.o%s} \
2793 %{mmcu=at90s4414:crts4414.o%s} \
2794 %{mmcu=at90s4434:crts4434.o%s} \
2795 %{mmcu=at90c8534:crtc8534.o%s} \
2796 %{mmcu=at90s8535:crts8535.o%s} \
2797 %{mmcu=atmega103|mmcu=avr3:crtm103.o%s} \
2798 %{mmcu=atmega603:crtm603.o%s} \
2799 %{mmcu=at43usb320:crt43320.o%s} \
2800 %{mmcu=at76c711:crt76711.o%s } \
2801 %{mmcu=atmega8:crtm8.o%s} \
2802 %{mmcu=atmega83|mmcu=avr4:crtm83.o%s} \
2803 %{mmcu=atmega85:crtm85.o%s} \
2804 %{mmcu=atmega16:crtm16.o%s} \
2805 %{mmcu=atmega161|mmcu=avr5:crtm161.o%s} \
2806 %{mmcu=atmega163:crtm163.o%s} \
2807 %{mmcu=atmega32:crtm32.o%s} \
2808 %{mmcu=atmega323:crtm323.o%s} \
2809 %{mmcu=atmega64:crtm64.o%s} \
2810 %{mmcu=atmega128:crtm128.o%s} \
2811 %{mmcu=at43usb355:crt43355.o%s} \
2812 %{mmcu=at94k:crtat94k.o%s}"
2814 #define CPP_AVR1_SPEC "-D__AVR_ARCH__=1 -D__AVR_ASM_ONLY__ "
2815 #define CPP_AVR2_SPEC "-D__AVR_ARCH__=2 "
2816 #define CPP_AVR3_SPEC "-D__AVR_ARCH__=3 -D__AVR_MEGA__ "
2817 #define CPP_AVR4_SPEC "-D__AVR_ARCH__=4 -D__AVR_ENHANCED__ "
2818 #define CPP_AVR5_SPEC "-D__AVR_ARCH__=5 -D__AVR_ENHANCED__ -D__AVR_MEGA__ "
2820 #define EXTRA_SPECS \
2821 {"cpp_avr1", CPP_AVR1_SPEC}, \
2822 {"cpp_avr2", CPP_AVR2_SPEC}, \
2823 {"cpp_avr3", CPP_AVR3_SPEC}, \
2824 {"cpp_avr4", CPP_AVR4_SPEC}, \
2825 {"cpp_avr5", CPP_AVR5_SPEC}, \
2826 {"crt_binutils", CRT_BINUTILS_SPECS},
2827 /* Define this macro to provide additional specifications to put in
2828 the `specs' file that can be used in various specifications like
2831 The definition should be an initializer for an array of structures,
2832 containing a string constant, that defines the specification name,
2833 and a string constant that provides the specification.
2835 Do not define this macro if it does not need to do anything.
2837 `EXTRA_SPECS' is useful when an architecture contains several
2838 related targets, which have various `..._SPECS' which are similar
2839 to each other, and the maintainer would like one central place to
2840 keep these definitions.
2842 For example, the PowerPC System V.4 targets use `EXTRA_SPECS' to
2843 define either `_CALL_SYSV' when the System V calling sequence is
2844 used or `_CALL_AIX' when the older AIX-based calling sequence is
2847 The `config/rs6000/rs6000.h' target file defines:
2849 #define EXTRA_SPECS \
2850 { "cpp_sysv_default", CPP_SYSV_DEFAULT },
2852 #define CPP_SYS_DEFAULT ""
2854 The `config/rs6000/sysv.h' target file defines:
2857 "%{posix: -D_POSIX_SOURCE } \
2858 %{mcall-sysv: -D_CALL_SYSV } %{mcall-aix: -D_CALL_AIX } \
2859 %{!mcall-sysv: %{!mcall-aix: %(cpp_sysv_default) }} \
2860 %{msoft-float: -D_SOFT_FLOAT} %{mcpu=403: -D_SOFT_FLOAT}"
2862 #undef CPP_SYSV_DEFAULT
2863 #define CPP_SYSV_DEFAULT "-D_CALL_SYSV"
2865 while the `config/rs6000/eabiaix.h' target file defines
2866 `CPP_SYSV_DEFAULT' as:
2868 #undef CPP_SYSV_DEFAULT
2869 #define CPP_SYSV_DEFAULT "-D_CALL_AIX" */
2871 /* This is the default without any -mmcu=* option (AT90S*). */
2872 #define MULTILIB_DEFAULTS { "mmcu=avr2" }
2874 /* This is undefined macro for collect2 disabling */
2875 #define LINKER_NAME "ld"
2877 #define TEST_HARD_REG_CLASS(CLASS, REGNO) \
2878 TEST_HARD_REG_BIT (reg_class_contents[ (int) (CLASS)], REGNO)
2880 /* Note that the other files fail to use these
2881 in some of the places where they should. */
2883 #if defined(__STDC__) || defined(ALMOST_STDC)
2884 #define AS2(a,b,c) #a " " #b "," #c
2885 #define AS2C(b,c) " " #b "," #c
2886 #define AS3(a,b,c,d) #a " " #b "," #c "," #d
2887 #define AS1(a,b) #a " " #b
2889 #define AS1(a,b) "a b"
2890 #define AS2(a,b,c) "a b,c"
2891 #define AS2C(b,c) " b,c"
2892 #define AS3(a,b,c,d) "a b,c,d"
2894 #define OUT_AS1(a,b) output_asm_insn (AS1(a,b), operands)
2895 #define OUT_AS2(a,b,c) output_asm_insn (AS2(a,b,c), operands)
2896 #define CR_TAB "\n\t"
2898 /* Define this macro as a C statement that declares additional library
2899 routines renames existing ones. `init_optabs' calls this macro
2900 after initializing all the normal library routines. */
2902 #define INIT_TARGET_OPTABS \
2907 /* Temporary register r0 */
2910 /* zero register r1 */
2911 #define ZERO_REGNO 1
2913 /* Temporary register which used for load immediate values to r0-r15 */
2914 #define LDI_REG_REGNO 31
2916 extern struct rtx_def *tmp_reg_rtx;
2917 extern struct rtx_def *zero_reg_rtx;
2918 extern struct rtx_def *ldi_reg_rtx;
2920 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
2922 /* Define to use software floating point emulator for REAL_ARITHMETIC and
2923 decimal <-> binary conversion. */
2924 #define REAL_ARITHMETIC
2926 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
2928 /* Get the standard ELF stabs definitions. */
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