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
130 /* This is to get correct SI and DI modes in libgcc2.c (32 and 64 bits). */
131 #define UNITS_PER_WORD 4
133 /* Width of a word, in units (bytes). */
134 #define UNITS_PER_WORD 1
137 /* Width in bits of a pointer.
138 See also the macro `Pmode' defined below. */
139 #define POINTER_SIZE 16
142 /* Maximum sized of reasonable data type
143 DImode or Dfmode ... */
144 #define MAX_FIXED_MODE_SIZE 32
146 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
147 #define PARM_BOUNDARY 8
149 /* Allocation boundary (in *bits*) for the code of a function. */
150 #define FUNCTION_BOUNDARY 8
152 /* Alignment of field after `int : 0' in a structure. */
153 #define EMPTY_FIELD_BOUNDARY 8
155 /* No data type wants to be aligned rounder than this. */
156 #define BIGGEST_ALIGNMENT 8
159 /* Define this if move instructions will actually fail to work
160 when given unaligned data. */
161 #define STRICT_ALIGNMENT 0
163 /* A C expression for the size in bits of the type `int' on the
164 target machine. If you don't define this, the default is one word. */
165 #define INT_TYPE_SIZE (TARGET_INT8 ? 8 : 16)
168 /* A C expression for the size in bits of the type `short' on the
169 target machine. If you don't define this, the default is half a
170 word. (If this would be less than one storage unit, it is rounded
172 #define SHORT_TYPE_SIZE (INT_TYPE_SIZE == 8 ? INT_TYPE_SIZE : 16)
174 /* A C expression for the size in bits of the type `long' on the
175 target machine. If you don't define this, the default is one word. */
176 #define LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 16 : 32)
178 #define MAX_LONG_TYPE_SIZE 32
179 /* Maximum number for the size in bits of the type `long' on the
180 target machine. If this is undefined, the default is
181 `LONG_TYPE_SIZE'. Otherwise, it is the constant value that is the
182 largest value that `LONG_TYPE_SIZE' can have at run-time. This is
186 #define LONG_LONG_TYPE_SIZE 64
187 /* A C expression for the size in bits of the type `long long' on the
188 target machine. If you don't define this, the default is two
189 words. If you want to support GNU Ada on your machine, the value
190 of macro must be at least 64. */
193 #define FLOAT_TYPE_SIZE 32
194 /* A C expression for the size in bits of the type `float' on the
195 target machine. If you don't define this, the default is one word. */
197 #define DOUBLE_TYPE_SIZE 32
198 /* A C expression for the size in bits of the type `double' on the
199 target machine. If you don't define this, the default is two
203 #define LONG_DOUBLE_TYPE_SIZE 32
204 /* A C expression for the size in bits of the type `long double' on
205 the target machine. If you don't define this, the default is two
208 #define DEFAULT_SIGNED_CHAR 1
209 /* An expression whose value is 1 or 0, according to whether the type
210 `char' should be signed or unsigned by default. The user can
211 always override this default with the options `-fsigned-char' and
212 `-funsigned-char'. */
214 /* `DEFAULT_SHORT_ENUMS'
215 A C expression to determine whether to give an `enum' type only as
216 many bytes as it takes to represent the range of possible values
217 of that type. A nonzero value means to do that; a zero value
218 means all `enum' types should be allocated like `int'.
220 If you don't define the macro, the default is 0. */
222 #define SIZE_TYPE (INT_TYPE_SIZE == 8 ? "long unsigned int" : "unsigned int")
223 /* A C expression for a string describing the name of the data type
224 to use for size values. The typedef name `size_t' is defined
225 using the contents of the string.
227 The string can contain more than one keyword. If so, separate
228 them with spaces, and write first any length keyword, then
229 `unsigned' if appropriate, and finally `int'. The string must
230 exactly match one of the data type names defined in the function
231 `init_decl_processing' in the file `c-decl.c'. You may not omit
232 `int' or change the order--that would cause the compiler to crash
235 If you don't define this macro, the default is `"long unsigned
238 #define PTRDIFF_TYPE (INT_TYPE_SIZE == 8 ? "long int" :"int")
239 /* A C expression for a string describing the name of the data type
240 to use for the result of subtracting two pointers. The typedef
241 name `ptrdiff_t' is defined using the contents of the string. See
242 `SIZE_TYPE' above for more information.
244 If you don't define this macro, the default is `"long int"'. */
247 #define WCHAR_TYPE_SIZE 16
248 /* A C expression for the size in bits of the data type for wide
249 characters. This is used in `cpp', which cannot make use of
252 #define FIRST_PSEUDO_REGISTER 36
253 /* Number of hardware registers known to the compiler. They receive
254 numbers 0 through `FIRST_PSEUDO_REGISTER-1'; thus, the first
255 pseudo register's number really is assigned the number
256 `FIRST_PSEUDO_REGISTER'. */
258 #define FIXED_REGISTERS {\
276 1,1 /* arg pointer */ }
277 /* An initializer that says which registers are used for fixed
278 purposes all throughout the compiled code and are therefore not
279 available for general allocation. These would include the stack
280 pointer, the frame pointer (except on machines where that can be
281 used as a general register when no frame pointer is needed), the
282 program counter on machines where that is considered one of the
283 addressable registers, and any other numbered register with a
286 This information is expressed as a sequence of numbers, separated
287 by commas and surrounded by braces. The Nth number is 1 if
288 register N is fixed, 0 otherwise.
290 The table initialized from this macro, and the table initialized by
291 the following one, may be overridden at run time either
292 automatically, by the actions of the macro
293 `CONDITIONAL_REGISTER_USAGE', or by the user with the command
294 options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'. */
296 #define CALL_USED_REGISTERS { \
314 1,1 /* arg pointer */ }
315 /* Like `FIXED_REGISTERS' but has 1 for each register that is
316 clobbered (in general) by function calls as well as for fixed
317 registers. This macro therefore identifies the registers that are
318 not available for general allocation of values that must live
319 across function calls.
321 If a register has 0 in `CALL_USED_REGISTERS', the compiler
322 automatically saves it on function entry and restores it on
323 function exit, if the register is used within the function. */
325 #define NON_SAVING_SETJMP 0
326 /* If this macro is defined and has a nonzero value, it means that
327 `setjmp' and related functions fail to save the registers, or that
328 `longjmp' fails to restore them. To compensate, the compiler
329 avoids putting variables in registers in functions that use
332 #define REG_ALLOC_ORDER { \
340 17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2, \
344 /* If defined, an initializer for a vector of integers, containing the
345 numbers of hard registers in the order in which GNU CC should
346 prefer to use them (from most preferred to least).
348 If this macro is not defined, registers are used lowest numbered
349 first (all else being equal).
351 One use of this macro is on machines where the highest numbered
352 registers must always be saved and the save-multiple-registers
353 instruction supports only sequences of consetionve registers. On
354 such machines, define `REG_ALLOC_ORDER' to be an initializer that
355 lists the highest numbered allocatable register first. */
357 #define ORDER_REGS_FOR_LOCAL_ALLOC order_regs_for_local_alloc ()
358 /* ORDER_REGS_FOR_LOCAL_ALLOC'
359 A C statement (sans semicolon) to choose the order in which to
360 allocate hard registers for pseudo-registers local to a basic
363 Store the desired register order in the array `reg_alloc_order'.
364 Element 0 should be the register to allocate first; element 1, the
365 next register; and so on.
367 The macro body should not assume anything about the contents of
368 `reg_alloc_order' before execution of the macro.
370 On most machines, it is not necessary to define this macro. */
373 #define HARD_REGNO_NREGS(REGNO, MODE) ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
375 /* A C expression for the number of consecutive hard registers,
376 starting at register number REGNO, required to hold a value of mode
379 On a machine where all registers are exactly one word, a suitable
380 definition of this macro is
382 #define HARD_REGNO_NREGS(REGNO, MODE) \
383 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
384 / UNITS_PER_WORD)) */
386 #define HARD_REGNO_MODE_OK(REGNO, MODE) avr_hard_regno_mode_ok(REGNO, MODE)
387 /* A C expression that is nonzero if it is permissible to store a
388 value of mode MODE in hard register number REGNO (or in several
389 registers starting with that one). For a machine where all
390 registers are equivalent, a suitable definition is
392 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
394 It is not necessary for this macro to check for the numbers of
395 fixed registers, because the allocation mechanism considers them
396 to be always occupied.
398 On some machines, double-precision values must be kept in even/odd
399 register pairs. The way to implement that is to define this macro
400 to reject odd register numbers for such modes.
402 The minimum requirement for a mode to be OK in a register is that
403 the `movMODE' instruction pattern support moves between the
404 register and any other hard register for which the mode is OK; and
405 that moving a value into the register and back out not alter it.
407 Since the same instruction used to move `SImode' will work for all
408 narrower integer modes, it is not necessary on any machine for
409 `HARD_REGNO_MODE_OK' to distinguish between these modes, provided
410 you define patterns `movhi', etc., to take advantage of this. This
411 is useful because of the interaction between `HARD_REGNO_MODE_OK'
412 and `MODES_TIEABLE_P'; it is very desirable for all integer modes
415 Many machines have special registers for floating point arithmetic.
416 Often people assume that floating point machine modes are allowed
417 only in floating point registers. This is not true. Any
418 registers that can hold integers can safely *hold* a floating
419 point machine mode, whether or not floating arithmetic can be done
420 on it in those registers. Integer move instructions can be used
423 On some machines, though, the converse is true: fixed-point machine
424 modes may not go in floating registers. This is true if the
425 floating registers normalize any value stored in them, because
426 storing a non-floating value there would garble it. In this case,
427 `HARD_REGNO_MODE_OK' should reject fixed-point machine modes in
428 floating registers. But if the floating registers do not
429 automatically normalize, if you can store any bit pattern in one
430 and retrieve it unchanged without a trap, then any machine mode
431 may go in a floating register, so you can define this macro to say
434 The primary significance of special floating registers is rather
435 that they are the registers acceptable in floating point arithmetic
436 instructions. However, this is of no concern to
437 `HARD_REGNO_MODE_OK'. You handle it by writing the proper
438 constraints for those instructions.
440 On some machines, the floating registers are especially slow to
441 access, so that it is better to store a value in a stack frame
442 than in such a register if floating point arithmetic is not being
443 done. As long as the floating registers are not in class
444 `GENERAL_REGS', they will not be used unless some pattern's
445 constraint asks for one. */
447 #define MODES_TIEABLE_P(MODE1, MODE2) 0
448 /* A C expression that is nonzero if it is desirable to choose
449 register allocation so as to avoid move instructions between a
450 value of mode MODE1 and a value of mode MODE2.
452 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R,
453 MODE2)' are ever different for any R, then `MODES_TIEABLE_P (MODE1,
454 MODE2)' must be zero. */
459 POINTER_X_REGS, /* r26 - r27 */
460 POINTER_Y_REGS, /* r28 - r29 */
461 POINTER_Z_REGS, /* r30 - r31 */
462 STACK_REG, /* STACK */
463 BASE_POINTER_REGS, /* r28 - r31 */
464 POINTER_REGS, /* r26 - r31 */
465 ADDW_REGS, /* r24 - r31 */
466 SIMPLE_LD_REGS, /* r16 - r23 */
467 LD_REGS, /* r16 - r31 */
468 NO_LD_REGS, /* r0 - r15 */
469 GENERAL_REGS, /* r0 - r31 */
470 ALL_REGS, LIM_REG_CLASSES
472 /* An enumeral type that must be defined with all the register class
473 names as enumeral values. `NO_REGS' must be first. `ALL_REGS'
474 must be the last register class, followed by one more enumeral
475 value, `LIM_REG_CLASSES', which is not a register class but rather
476 tells how many classes there are.
478 Each register class has a number, which is the value of casting
479 the class name to type `int'. The number serves as an index in
480 many of the tables described below. */
483 #define N_REG_CLASSES (int)LIM_REG_CLASSES
484 /* The number of distinct register classes, defined as follows:
486 #define N_REG_CLASSES (int) LIM_REG_CLASSES */
488 #define REG_CLASS_NAMES { \
491 "POINTER_X_REGS", /* r26 - r27 */ \
492 "POINTER_Y_REGS", /* r28 - r29 */ \
493 "POINTER_Z_REGS", /* r30 - r31 */ \
494 "STACK_REG", /* STACK */ \
495 "BASE_POINTER_REGS", /* r28 - r31 */ \
496 "POINTER_REGS", /* r26 - r31 */ \
497 "ADDW_REGS", /* r24 - r31 */ \
498 "SIMPLE_LD_REGS", /* r16 - r23 */ \
499 "LD_REGS", /* r16 - r31 */ \
500 "NO_LD_REGS", /* r0 - r15 */ \
501 "GENERAL_REGS", /* r0 - r31 */ \
503 /* An initializer containing the names of the register classes as C
504 string constants. These names are used in writing some of the
512 #define REG_CLASS_CONTENTS { \
513 {0x00000000,0x00000000}, /* NO_REGS */ \
514 {0x00000001,0x00000000}, /* R0_REG */ \
515 {3 << REG_X,0x00000000}, /* POINTER_X_REGS, r26 - r27 */ \
516 {3 << REG_Y,0x00000000}, /* POINTER_Y_REGS, r28 - r29 */ \
517 {3 << REG_Z,0x00000000}, /* POINTER_Z_REGS, r30 - r31 */ \
518 {0x00000000,0x00000003}, /* STACK_REG, STACK */ \
519 {(3 << REG_Y) | (3 << REG_Z), \
520 0x00000000}, /* BASE_POINTER_REGS, r28 - r31 */ \
521 {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z), \
522 0x00000000}, /* POINTER_REGS, r26 - r31 */ \
523 {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z) | (3 << REG_W), \
524 0x00000000}, /* ADDW_REGS, r24 - r31 */ \
525 {0x00ff0000,0x00000000}, /* SIMPLE_LD_REGS r16 - r23 */ \
526 {(3 << REG_X)|(3 << REG_Y)|(3 << REG_Z)|(3 << REG_W)|(0xff << 16), \
527 0x00000000}, /* LD_REGS, r16 - r31 */ \
528 {0x0000ffff,0x00000000}, /* NO_LD_REGS r0 - r15 */ \
529 {0xffffffff,0x00000000}, /* GENERAL_REGS, r0 - r31 */ \
530 {0xffffffff,0x00000003} /* ALL_REGS */ \
532 /* An initializer containing the contents of the register classes, as
533 integers which are bit masks. The Nth integer specifies the
534 contents of class N. The way the integer MASK is interpreted is
535 that register R is in the class if `MASK & (1 << R)' is 1.
537 When the machine has more than 32 registers, an integer does not
538 suffice. Then the integers are replaced by sub-initializers,
539 braced groupings containing several integers. Each
540 sub-initializer must be suitable as an initializer for the type
541 `HARD_REG_SET' which is defined in `hard-reg-set.h'. */
543 #define REGNO_REG_CLASS(R) avr_regno_reg_class(R)
544 /* A C expression whose value is a register class containing hard
545 register REGNO. In general there is more than one such class;
546 choose a class which is "minimal", meaning that no smaller class
547 also contains the register. */
549 #define BASE_REG_CLASS POINTER_REGS
550 /* A macro whose definition is the name of the class to which a valid
551 base register must belong. A base register is one used in an
552 address which is the register value plus a displacement. */
554 #define INDEX_REG_CLASS NO_REGS
555 /* A macro whose definition is the name of the class to which a valid
556 index register must belong. An index register is one used in an
557 address where its value is either multiplied by a scale factor or
558 added to another register (as well as added to a displacement). */
560 #define REG_CLASS_FROM_LETTER(C) avr_reg_class_from_letter(C)
561 /* A C expression which defines the machine-dependent operand
562 constraint letters for register classes. If CHAR is such a
563 letter, the value should be the register class corresponding to
564 it. Otherwise, the value should be `NO_REGS'. The register
565 letter `r', corresponding to class `GENERAL_REGS', will not be
566 passed to this macro; you do not need to handle it. */
568 #define REGNO_OK_FOR_BASE_P(r) (((r) < FIRST_PSEUDO_REGISTER \
572 || (r) == ARG_POINTER_REGNUM)) \
574 && (reg_renumber[r] == REG_X \
575 || reg_renumber[r] == REG_Y \
576 || reg_renumber[r] == REG_Z \
577 || (reg_renumber[r] \
578 == ARG_POINTER_REGNUM))))
579 /* A C expression which is nonzero if register number NUM is suitable
580 for use as a base register in operand addresses. It may be either
581 a suitable hard register or a pseudo register that has been
582 allocated such a hard register. */
584 /* #define REGNO_MODE_OK_FOR_BASE_P(r, m) regno_mode_ok_for_base_p(r, m)
585 A C expression that is just like `REGNO_OK_FOR_BASE_P', except that
586 that expression may examine the mode of the memory reference in
587 MODE. You should define this macro if the mode of the memory
588 reference affects whether a register may be used as a base
589 register. If you define this macro, the compiler will use it
590 instead of `REGNO_OK_FOR_BASE_P'. */
592 #define REGNO_OK_FOR_INDEX_P(NUM) 0
593 /* A C expression which is nonzero if register number NUM is suitable
594 for use as an index register in operand addresses. It may be
595 either a suitable hard register or a pseudo register that has been
596 allocated such a hard register.
598 The difference between an index register and a base register is
599 that the index register may be scaled. If an address involves the
600 sum of two registers, neither one of them scaled, then either one
601 may be labeled the "base" and the other the "index"; but whichever
602 labeling is used must fit the machine's constraints of which
603 registers may serve in each capacity. The compiler will try both
604 labelings, looking for one that is valid, and will reload one or
605 both registers only if neither labeling works. */
607 #define PREFERRED_RELOAD_CLASS(X, CLASS) preferred_reload_class(X,CLASS)
608 /* A C expression that places additional restrictions on the register
609 class to use when it is necessary to copy value X into a register
610 in class CLASS. The value is a register class; perhaps CLASS, or
611 perhaps another, smaller class. On many machines, the following
614 #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS
616 Sometimes returning a more restrictive class makes better code.
617 For example, on the 68000, when X is an integer constant that is
618 in range for a `moveq' instruction, the value of this macro is
619 always `DATA_REGS' as long as CLASS includes the data registers.
620 Requiring a data register guarantees that a `moveq' will be used.
622 If X is a `const_double', by returning `NO_REGS' you can force X
623 into a memory constant. This is useful on certain machines where
624 immediate floating values cannot be loaded into certain kinds of
626 /* `PREFERRED_OUTPUT_RELOAD_CLASS (X, CLASS)'
627 Like `PREFERRED_RELOAD_CLASS', but for output reloads instead of
628 input reloads. If you don't define this macro, the default is to
629 use CLASS, unchanged. */
631 /* `LIMIT_RELOAD_CLASS (MODE, CLASS)'
632 A C expression that places additional restrictions on the register
633 class to use when it is necessary to be able to hold a value of
634 mode MODE in a reload register for which class CLASS would
637 Unlike `PREFERRED_RELOAD_CLASS', this macro should be used when
638 there are certain modes that simply can't go in certain reload
641 The value is a register class; perhaps CLASS, or perhaps another,
644 Don't define this macro unless the target machine has limitations
645 which require the macro to do something nontrivial. */
647 /* SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X)
648 `SECONDARY_RELOAD_CLASS (CLASS, MODE, X)'
649 `SECONDARY_OUTPUT_RELOAD_CLASS (CLASS, MODE, X)'
650 Many machines have some registers that cannot be copied directly
651 to or from memory or even from other types of registers. An
652 example is the `MQ' register, which on most machines, can only be
653 copied to or from general registers, but not memory. Some
654 machines allow copying all registers to and from memory, but
655 require a scratch register for stores to some memory locations
656 (e.g., those with symbolic address on the RT, and those with
657 certain symbolic address on the Sparc when compiling PIC). In
658 some cases, both an intermediate and a scratch register are
661 You should define these macros to indicate to the reload phase
662 that it may need to allocate at least one register for a reload in
663 addition to the register to contain the data. Specifically, if
664 copying X to a register CLASS in MODE requires an intermediate
665 register, you should define `SECONDARY_INPUT_RELOAD_CLASS' to
666 return the largest register class all of whose registers can be
667 used as intermediate registers or scratch registers.
669 If copying a register CLASS in MODE to X requires an intermediate
670 or scratch register, `SECONDARY_OUTPUT_RELOAD_CLASS' should be
671 defined to return the largest register class required. If the
672 requirements for input and output reloads are the same, the macro
673 `SECONDARY_RELOAD_CLASS' should be used instead of defining both
676 The values returned by these macros are often `GENERAL_REGS'.
677 Return `NO_REGS' if no spare register is needed; i.e., if X can be
678 directly copied to or from a register of CLASS in MODE without
679 requiring a scratch register. Do not define this macro if it
680 would always return `NO_REGS'.
682 If a scratch register is required (either with or without an
683 intermediate register), you should define patterns for
684 `reload_inM' or `reload_outM', as required (*note Standard
685 Names::.. These patterns, which will normally be implemented with
686 a `define_expand', should be similar to the `movM' patterns,
687 except that operand 2 is the scratch register.
689 Define constraints for the reload register and scratch register
690 that contain a single register class. If the original reload
691 register (whose class is CLASS) can meet the constraint given in
692 the pattern, the value returned by these macros is used for the
693 class of the scratch register. Otherwise, two additional reload
694 registers are required. Their classes are obtained from the
695 constraints in the insn pattern.
697 X might be a pseudo-register or a `subreg' of a pseudo-register,
698 which could either be in a hard register or in memory. Use
699 `true_regnum' to find out; it will return -1 if the pseudo is in
700 memory and the hard register number if it is in a register.
702 These macros should not be used in the case where a particular
703 class of registers can only be copied to memory and not to another
704 class of registers. In that case, secondary reload registers are
705 not needed and would not be helpful. Instead, a stack location
706 must be used to perform the copy and the `movM' pattern should use
707 memory as an intermediate storage. This case often occurs between
708 floating-point and general registers. */
710 /* `SECONDARY_MEMORY_NEEDED (CLASS1, CLASS2, M)'
711 Certain machines have the property that some registers cannot be
712 copied to some other registers without using memory. Define this
713 macro on those machines to be a C expression that is non-zero if
714 objects of mode M in registers of CLASS1 can only be copied to
715 registers of class CLASS2 by storing a register of CLASS1 into
716 memory and loading that memory location into a register of CLASS2.
718 Do not define this macro if its value would always be zero.
720 `SECONDARY_MEMORY_NEEDED_RTX (MODE)'
721 Normally when `SECONDARY_MEMORY_NEEDED' is defined, the compiler
722 allocates a stack slot for a memory location needed for register
723 copies. If this macro is defined, the compiler instead uses the
724 memory location defined by this macro.
726 Do not define this macro if you do not define
727 `SECONDARY_MEMORY_NEEDED'. */
729 #define SMALL_REGISTER_CLASSES 1
730 /* Normally the compiler avoids choosing registers that have been
731 explicitly mentioned in the rtl as spill registers (these
732 registers are normally those used to pass parameters and return
733 values). However, some machines have so few registers of certain
734 classes that there would not be enough registers to use as spill
735 registers if this were done.
737 Define `SMALL_REGISTER_CLASSES' to be an expression with a non-zero
738 value on these machines. When this macro has a non-zero value, the
739 compiler allows registers explicitly used in the rtl to be used as
740 spill registers but avoids extending the lifetime of these
743 It is always safe to define this macro with a non-zero value, but
744 if you unnecessarily define it, you will reduce the amount of
745 optimizations that can be performed in some cases. If you do not
746 define this macro with a non-zero value when it is required, the
747 compiler will run out of spill registers and print a fatal error
748 message. For most machines, you should not define this macro at
751 #define CLASS_LIKELY_SPILLED_P(c) class_likely_spilled_p(c)
752 /* A C expression whose value is nonzero if pseudos that have been
753 assigned to registers of class CLASS would likely be spilled
754 because registers of CLASS are needed for spill registers.
756 The default value of this macro returns 1 if CLASS has exactly one
757 register and zero otherwise. On most machines, this default
758 should be used. Only define this macro to some other expression
759 if pseudo allocated by `local-alloc.c' end up in memory because
760 their hard registers were needed for spill registers. If this
761 macro returns nonzero for those classes, those pseudos will only
762 be allocated by `global.c', which knows how to reallocate the
763 pseudo to another register. If there would not be another
764 register available for reallocation, you should not change the
765 definition of this macro since the only effect of such a
766 definition would be to slow down register allocation. */
768 #define CLASS_MAX_NREGS(CLASS, MODE) class_max_nregs (CLASS, MODE)
769 /* A C expression for the maximum number of consecutive registers of
770 class CLASS needed to hold a value of mode MODE.
772 This is closely related to the macro `HARD_REGNO_NREGS'. In fact,
773 the value of the macro `CLASS_MAX_NREGS (CLASS, MODE)' should be
774 the maximum value of `HARD_REGNO_NREGS (REGNO, MODE)' for all
775 REGNO values in the class CLASS.
777 This macro helps control the handling of multiple-word values in
780 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
781 ((C) == 'I' ? (VALUE) >= 0 && (VALUE) <= 63 : \
782 (C) == 'J' ? (VALUE) <= 0 && (VALUE) >= -63: \
783 (C) == 'K' ? (VALUE) == 2 : \
784 (C) == 'L' ? (VALUE) == 0 : \
785 (C) == 'M' ? (VALUE) >= 0 && (VALUE) <= 0xff : \
786 (C) == 'N' ? (VALUE) == -1: \
787 (C) == 'O' ? (VALUE) == 8 || (VALUE) == 16 || (VALUE) == 24: \
788 (C) == 'P' ? (VALUE) == 1 : \
791 /* A C expression that defines the machine-dependent operand
792 constraint letters (`I', `J', `K', ... `P') that specify
793 particular ranges of integer values. If C is one of those
794 letters, the expression should check that VALUE, an integer, is in
795 the appropriate range and return 1 if so, 0 otherwise. If C is
796 not one of those letters, the value should be 0 regardless of
799 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
800 ((C) == 'G' ? (VALUE) == CONST0_RTX (SFmode) \
802 /* `CONST_DOUBLE_OK_FOR_LETTER_P (VALUE, C)'
803 A C expression that defines the machine-dependent operand
804 constraint letters that specify particular ranges of
805 `const_double' values (`G' or `H').
807 If C is one of those letters, the expression should check that
808 VALUE, an RTX of code `const_double', is in the appropriate range
809 and return 1 if so, 0 otherwise. If C is not one of those
810 letters, the value should be 0 regardless of VALUE.
812 `const_double' is used for all floating-point constants and for
813 `DImode' fixed-point constants. A given letter can accept either
814 or both kinds of values. It can use `GET_MODE' to distinguish
815 between these kinds. */
817 #define EXTRA_CONSTRAINT(x, c) extra_constraint(x, c)
818 /* A C expression that defines the optional machine-dependent
819 constraint letters (``Q', `R', `S', `T', `U') that can'
820 be used to segregate specific types of operands, usually memory
821 references, for the target machine. Normally this macro will not
822 be defined. If it is required for a particular target machine, it
823 should return 1 if VALUE corresponds to the operand type
824 represented by the constraint letter C. If C is not defined as an
825 extra constraint, the value returned should be 0 regardless of
828 For example, on the ROMP, load instructions cannot have their
829 output in r0 if the memory reference contains a symbolic address.
830 Constraint letter `Q' is defined as representing a memory address
831 that does *not* contain a symbolic address. An alternative is
832 specified with a `Q' constraint on the input and `r' on the
833 output. The next alternative specifies `m' on the input and a
834 register class that does not include r0 on the output. */
836 /* This is an undocumented variable which describes
837 how GCC will push a data */
838 #define STACK_PUSH_CODE POST_DEC
840 #define STACK_GROWS_DOWNWARD
841 /* Define this macro if pushing a word onto the stack moves the stack
842 pointer to a smaller address.
844 When we say, "define this macro if ...," it means that the
845 compiler checks this macro only with `#ifdef' so the precise
846 definition used does not matter. */
848 #define STARTING_FRAME_OFFSET 1
849 /* Offset from the frame pointer to the first local variable slot to
852 If `FRAME_GROWS_DOWNWARD', find the next slot's offset by
853 subtracting the first slot's length from `STARTING_FRAME_OFFSET'.
854 Otherwise, it is found by adding the length of the first slot to
855 the value `STARTING_FRAME_OFFSET'. */
857 #define STACK_POINTER_OFFSET 1
858 /* Offset from the stack pointer register to the first location at
859 which outgoing arguments are placed. If not specified, the
860 default value of zero is used. This is the proper value for most
863 If `ARGS_GROW_DOWNWARD', this is the offset to the location above
864 the first location at which outgoing arguments are placed. */
866 #define FIRST_PARM_OFFSET(FUNDECL) 0
867 /* Offset from the argument pointer register to the first argument's
868 address. On some machines it may depend on the data type of the
871 If `ARGS_GROW_DOWNWARD', this is the offset to the location above
872 the first argument's address. */
874 /* `STACK_DYNAMIC_OFFSET (FUNDECL)'
875 Offset from the stack pointer register to an item dynamically
876 allocated on the stack, e.g., by `alloca'.
878 The default value for this macro is `STACK_POINTER_OFFSET' plus the
879 length of the outgoing arguments. The default is correct for most
880 machines. See `function.c' for details. */
882 #define STACK_BOUNDARY 8
883 /* Define this macro if there is a guaranteed alignment for the stack
884 pointer on this machine. The definition is a C expression for the
885 desired alignment (measured in bits). This value is used as a
886 default if PREFERRED_STACK_BOUNDARY is not defined. */
888 #define STACK_POINTER_REGNUM 32
889 /* The register number of the stack pointer register, which must also
890 be a fixed register according to `FIXED_REGISTERS'. On most
891 machines, the hardware determines which register this is. */
893 #define FRAME_POINTER_REGNUM REG_Y
894 /* The register number of the frame pointer register, which is used to
895 access automatic variables in the stack frame. On some machines,
896 the hardware determines which register this is. On other
897 machines, you can choose any register you wish for this purpose. */
899 #define ARG_POINTER_REGNUM 34
900 /* The register number of the arg pointer register, which is used to
901 access the function's argument list. On some machines, this is
902 the same as the frame pointer register. On some machines, the
903 hardware determines which register this is. On other machines,
904 you can choose any register you wish for this purpose. If this is
905 not the same register as the frame pointer register, then you must
906 mark it as a fixed register according to `FIXED_REGISTERS', or
907 arrange to be able to eliminate it (*note Elimination::.). */
909 #define STATIC_CHAIN_REGNUM 2
910 /* Register numbers used for passing a function's static chain
911 pointer. If register windows are used, the register number as
912 seen by the called function is `STATIC_CHAIN_INCOMING_REGNUM',
913 while the register number as seen by the calling function is
914 `STATIC_CHAIN_REGNUM'. If these registers are the same,
915 `STATIC_CHAIN_INCOMING_REGNUM' need not be defined.
917 The static chain register need not be a fixed register.
919 If the static chain is passed in memory, these macros should not be
920 defined; instead, the next two macros should be defined. */
922 #define FRAME_POINTER_REQUIRED frame_pointer_required_p()
923 /* A C expression which is nonzero if a function must have and use a
924 frame pointer. This expression is evaluated in the reload pass.
925 If its value is nonzero the function will have a frame pointer.
927 The expression can in principle examine the current function and
928 decide according to the facts, but on most machines the constant 0
929 or the constant 1 suffices. Use 0 when the machine allows code to
930 be generated with no frame pointer, and doing so saves some time
931 or space. Use 1 when there is no possible advantage to avoiding a
934 In certain cases, the compiler does not know how to produce valid
935 code without a frame pointer. The compiler recognizes those cases
936 and automatically gives the function a frame pointer regardless of
937 what `FRAME_POINTER_REQUIRED' says. You don't need to worry about
940 In a function that does not require a frame pointer, the frame
941 pointer register can be allocated for ordinary usage, unless you
942 mark it as a fixed register. See `FIXED_REGISTERS' for more
945 #define ELIMINABLE_REGS { \
946 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
947 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM} \
948 ,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}}
949 /* If defined, this macro specifies a table of register pairs used to
950 eliminate unneeded registers that point into the stack frame. If
951 it is not defined, the only elimination attempted by the compiler
952 is to replace references to the frame pointer with references to
955 The definition of this macro is a list of structure
956 initializations, each of which specifies an original and
957 replacement register.
959 On some machines, the position of the argument pointer is not
960 known until the compilation is completed. In such a case, a
961 separate hard register must be used for the argument pointer.
962 This register can be eliminated by replacing it with either the
963 frame pointer or the argument pointer, depending on whether or not
964 the frame pointer has been eliminated.
966 In this case, you might specify:
967 #define ELIMINABLE_REGS \
968 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
969 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
970 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
972 Note that the elimination of the argument pointer with the stack
973 pointer is specified first since that is the preferred elimination. */
975 #define CAN_ELIMINATE(FROM, TO) (((FROM) == ARG_POINTER_REGNUM \
976 && (TO) == FRAME_POINTER_REGNUM) \
977 || (((FROM) == FRAME_POINTER_REGNUM \
978 || (FROM) == FRAME_POINTER_REGNUM+1) \
979 && ! FRAME_POINTER_REQUIRED \
981 /* A C expression that returns non-zero if the compiler is allowed to
982 try to replace register number FROM-REG with register number
983 TO-REG. This macro need only be defined if `ELIMINABLE_REGS' is
984 defined, and will usually be the constant 1, since most of the
985 cases preventing register elimination are things that the compiler
986 already knows about. */
988 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
989 OFFSET = initial_elimination_offset (FROM, TO)
990 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It
991 specifies the initial difference between the specified pair of
992 registers. This macro must be defined if `ELIMINABLE_REGS' is
995 #define RETURN_ADDR_RTX(count, x) \
996 gen_rtx_MEM (Pmode, memory_address (Pmode, plus_constant (tem, 1)))
998 #define PUSH_ROUNDING(NPUSHED) (NPUSHED)
999 /* A C expression that is the number of bytes actually pushed onto the
1000 stack when an instruction attempts to push NPUSHED bytes.
1002 If the target machine does not have a push instruction, do not
1003 define this macro. That directs GNU CC to use an alternate
1004 strategy: to allocate the entire argument block and then store the
1007 On some machines, the definition
1009 #define PUSH_ROUNDING(BYTES) (BYTES)
1011 will suffice. But on other machines, instructions that appear to
1012 push one byte actually push two bytes in an attempt to maintain
1013 alignment. Then the definition should be
1015 #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1) */
1017 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
1018 /* A C expression that should indicate the number of bytes of its own
1019 arguments that a function pops on returning, or 0 if the function
1020 pops no arguments and the caller must therefore pop them all after
1021 the function returns.
1023 FUNDECL is a C variable whose value is a tree node that describes
1024 the function in question. Normally it is a node of type
1025 `FUNCTION_DECL' that describes the declaration of the function.
1026 From this you can obtain the DECL_ATTRIBUTES of the
1029 FUNTYPE is a C variable whose value is a tree node that describes
1030 the function in question. Normally it is a node of type
1031 `FUNCTION_TYPE' that describes the data type of the function.
1032 From this it is possible to obtain the data types of the value and
1033 arguments (if known).
1035 When a call to a library function is being considered, FUNDECL
1036 will contain an identifier node for the library function. Thus, if
1037 you need to distinguish among various library functions, you can
1038 do so by their names. Note that "library function" in this
1039 context means a function used to perform arithmetic, whose name is
1040 known specially in the compiler and was not mentioned in the C
1041 code being compiled.
1043 STACK-SIZE is the number of bytes of arguments passed on the
1044 stack. If a variable number of bytes is passed, it is zero, and
1045 argument popping will always be the responsibility of the calling
1048 On the VAX, all functions always pop their arguments, so the
1049 definition of this macro is STACK-SIZE. On the 68000, using the
1050 standard calling convention, no functions pop their arguments, so
1051 the value of the macro is always 0 in this case. But an
1052 alternative calling convention is available in which functions
1053 that take a fixed number of arguments pop them but other functions
1054 (such as `printf') pop nothing (the caller pops all). When this
1055 convention is in use, FUNTYPE is examined to determine whether a
1056 function takes a fixed number of arguments. */
1058 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) (function_arg (&(CUM), MODE, TYPE, NAMED))
1059 /* A C expression that controls whether a function argument is passed
1060 in a register, and which register.
1062 The arguments are CUM, which summarizes all the previous
1063 arguments; MODE, the machine mode of the argument; TYPE, the data
1064 type of the argument as a tree node or 0 if that is not known
1065 (which happens for C support library functions); and NAMED, which
1066 is 1 for an ordinary argument and 0 for nameless arguments that
1067 correspond to `...' in the called function's prototype.
1069 The value of the expression is usually either a `reg' RTX for the
1070 hard register in which to pass the argument, or zero to pass the
1071 argument on the stack.
1073 For machines like the VAX and 68000, where normally all arguments
1074 are pushed, zero suffices as a definition.
1076 The value of the expression can also be a `parallel' RTX. This is
1077 used when an argument is passed in multiple locations. The mode
1078 of the of the `parallel' should be the mode of the entire
1079 argument. The `parallel' holds any number of `expr_list' pairs;
1080 each one describes where part of the argument is passed. In each
1081 `expr_list', the first operand can be either a `reg' RTX for the
1082 hard register in which to pass this part of the argument, or zero
1083 to pass the argument on the stack. If this operand is a `reg',
1084 then the mode indicates how large this part of the argument is.
1085 The second operand of the `expr_list' is a `const_int' which gives
1086 the offset in bytes into the entire argument where this part
1089 The usual way to make the ANSI library `stdarg.h' work on a machine
1090 where some arguments are usually passed in registers, is to cause
1091 nameless arguments to be passed on the stack instead. This is done
1092 by making `FUNCTION_ARG' return 0 whenever NAMED is 0.
1094 You may use the macro `MUST_PASS_IN_STACK (MODE, TYPE)' in the
1095 definition of this macro to determine if this argument is of a
1096 type that must be passed in the stack. If `REG_PARM_STACK_SPACE'
1097 is not defined and `FUNCTION_ARG' returns non-zero for such an
1098 argument, the compiler will abort. If `REG_PARM_STACK_SPACE' is
1099 defined, the argument will be computed in the stack and then
1100 loaded into a register. */
1102 typedef struct avr_args {
1103 int nregs; /* # registers available for passing */
1104 int regno; /* next available register number */
1106 /* A C type for declaring a variable that is used as the first
1107 argument of `FUNCTION_ARG' and other related values. For some
1108 target machines, the type `int' suffices and can hold the number
1109 of bytes of argument so far.
1111 There is no need to record in `CUMULATIVE_ARGS' anything about the
1112 arguments that have been passed on the stack. The compiler has
1113 other variables to keep track of that. For target machines on
1114 which all arguments are passed on the stack, there is no need to
1115 store anything in `CUMULATIVE_ARGS'; however, the data structure
1116 must exist and should not be empty, so use `int'. */
1118 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) init_cumulative_args (&(CUM), FNTYPE, LIBNAME, INDIRECT)
1120 /* A C statement (sans semicolon) for initializing the variable CUM
1121 for the state at the beginning of the argument list. The variable
1122 has type `CUMULATIVE_ARGS'. The value of FNTYPE is the tree node
1123 for the data type of the function which will receive the args, or 0
1124 if the args are to a compiler support library function. The value
1125 of INDIRECT is nonzero when processing an indirect call, for
1126 example a call through a function pointer. The value of INDIRECT
1127 is zero for a call to an explicitly named function, a library
1128 function call, or when `INIT_CUMULATIVE_ARGS' is used to find
1129 arguments for the function being compiled.
1131 When processing a call to a compiler support library function,
1132 LIBNAME identifies which one. It is a `symbol_ref' rtx which
1133 contains the name of the function, as a string. LIBNAME is 0 when
1134 an ordinary C function call is being processed. Thus, each time
1135 this macro is called, either LIBNAME or FNTYPE is nonzero, but
1136 never both of them at once. */
1138 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
1139 (function_arg_advance (&CUM, MODE, TYPE, NAMED))
1141 /* A C statement (sans semicolon) to update the summarizer variable
1142 CUM to advance past an argument in the argument list. The values
1143 MODE, TYPE and NAMED describe that argument. Once this is done,
1144 the variable CUM is suitable for analyzing the *following*
1145 argument with `FUNCTION_ARG', etc.
1147 This macro need not do anything if the argument in question was
1148 passed on the stack. The compiler knows how to track the amount
1149 of stack space used for arguments without any special help. */
1151 #define FUNCTION_ARG_REGNO_P(r) function_arg_regno_p(r)
1152 /* A C expression that is nonzero if REGNO is the number of a hard
1153 register in which function arguments are sometimes passed. This
1154 does *not* include implicit arguments such as the static chain and
1155 the structure-value address. On many machines, no registers can be
1156 used for this purpose since all function arguments are pushed on
1159 extern int avr_reg_order[];
1161 #define RET_REGISTER avr_ret_register ()
1163 #define FUNCTION_VALUE(VALTYPE, FUNC) avr_function_value (VALTYPE, FUNC)
1164 /* A C expression to create an RTX representing the place where a
1165 function returns a value of data type VALTYPE. VALTYPE is a tree
1166 node representing a data type. Write `TYPE_MODE (VALTYPE)' to get
1167 the machine mode used to represent that type. On many machines,
1168 only the mode is relevant. (Actually, on most machines, scalar
1169 values are returned in the same place regardless of mode).
1171 The value of the expression is usually a `reg' RTX for the hard
1172 register where the return value is stored. The value can also be a
1173 `parallel' RTX, if the return value is in multiple places. See
1174 `FUNCTION_ARG' for an explanation of the `parallel' form.
1176 If `PROMOTE_FUNCTION_RETURN' is defined, you must apply the same
1177 promotion rules specified in `PROMOTE_MODE' if VALTYPE is a scalar
1180 If the precise function being called is known, FUNC is a tree node
1181 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This
1182 makes it possible to use a different value-returning convention
1183 for specific functions when all their calls are known.
1185 `FUNCTION_VALUE' is not used for return vales with aggregate data
1186 types, because these are returned in another way. See
1187 `STRUCT_VALUE_REGNUM' and related macros, below. */
1189 #define LIBCALL_VALUE(MODE) avr_libcall_value (MODE)
1190 /* A C expression to create an RTX representing the place where a
1191 library function returns a value of mode MODE. If the precise
1192 function being called is known, FUNC is a tree node
1193 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This
1194 makes it possible to use a different value-returning convention
1195 for specific functions when all their calls are known.
1197 Note that "library function" in this context means a compiler
1198 support routine, used to perform arithmetic, whose name is known
1199 specially by the compiler and was not mentioned in the C code being
1202 The definition of `LIBRARY_VALUE' need not be concerned aggregate
1203 data types, because none of the library functions returns such
1206 #define FUNCTION_VALUE_REGNO_P(N) ((N) == RET_REGISTER)
1207 /* A C expression that is nonzero if REGNO is the number of a hard
1208 register in which the values of called function may come back.
1210 A register whose use for returning values is limited to serving as
1211 the second of a pair (for a value of type `double', say) need not
1212 be recognized by this macro. So for most machines, this definition
1215 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
1217 If the machine has register windows, so that the caller and the
1218 called function use different registers for the return value, this
1219 macro should recognize only the caller's register numbers. */
1221 #define RETURN_IN_MEMORY(TYPE) ((TYPE_MODE (TYPE) == BLKmode) \
1222 ? int_size_in_bytes (TYPE) > 8 \
1224 /* A C expression which can inhibit the returning of certain function
1225 values in registers, based on the type of value. A nonzero value
1226 says to return the function value in memory, just as large
1227 structures are always returned. Here TYPE will be a C expression
1228 of type `tree', representing the data type of the value.
1230 Note that values of mode `BLKmode' must be explicitly handled by
1231 this macro. Also, the option `-fpcc-struct-return' takes effect
1232 regardless of this macro. On most systems, it is possible to
1233 leave the macro undefined; this causes a default definition to be
1234 used, whose value is the constant 1 for `BLKmode' values, and 0
1237 Do not use this macro to indicate that structures and unions
1238 should always be returned in memory. You should instead use
1239 `DEFAULT_PCC_STRUCT_RETURN' to indicate this. */
1241 #define DEFAULT_PCC_STRUCT_RETURN 0
1242 /* Define this macro to be 1 if all structure and union return values
1243 must be in memory. Since this results in slower code, this should
1244 be defined only if needed for compatibility with other compilers
1245 or with an ABI. If you define this macro to be 0, then the
1246 conventions used for structure and union return values are decided
1247 by the `RETURN_IN_MEMORY' macro.
1249 If not defined, this defaults to the value 1. */
1251 #define STRUCT_VALUE 0
1252 /* If the structure value address is not passed in a register, define
1253 `STRUCT_VALUE' as an expression returning an RTX for the place
1254 where the address is passed. If it returns 0, the address is
1255 passed as an "invisible" first argument. */
1257 #define STRUCT_VALUE_INCOMING 0
1258 /* If the incoming location is not a register, then you should define
1259 `STRUCT_VALUE_INCOMING' as an expression for an RTX for where the
1260 called function should find the value. If it should find the
1261 value on the stack, define this to create a `mem' which refers to
1262 the frame pointer. A definition of 0 means that the address is
1263 passed as an "invisible" first argument. */
1265 #define EPILOGUE_USES(REGNO) 0
1266 /* Define this macro as a C expression that is nonzero for registers
1267 are used by the epilogue or the `return' pattern. The stack and
1268 frame pointer registers are already be assumed to be used as
1271 #define STRICT_ARGUMENT_NAMING 1
1272 /* Define this macro if the location where a function argument is
1273 passed depends on whether or not it is a named argument.
1275 This macro controls how the NAMED argument to `FUNCTION_ARG' is
1276 set for varargs and stdarg functions. With this macro defined,
1277 the NAMED argument is always true for named arguments, and false
1278 for unnamed arguments. If this is not defined, but
1279 `SETUP_INCOMING_VARARGS' is defined, then all arguments are
1280 treated as named. Otherwise, all named arguments except the last
1281 are treated as named. */
1284 #define HAVE_POST_INCREMENT 1
1285 /* Define this macro if the machine supports post-increment
1288 #define HAVE_PRE_DECREMENT 1
1289 /* #define HAVE_PRE_INCREMENT
1290 #define HAVE_POST_DECREMENT */
1291 /* Similar for other kinds of addressing. */
1293 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
1294 /* A C expression that is 1 if the RTX X is a constant which is a
1295 valid address. On most machines, this can be defined as
1296 `CONSTANT_P (X)', but a few machines are more restrictive in which
1297 constant addresses are supported.
1299 `CONSTANT_P' accepts integer-values expressions whose values are
1300 not explicitly known, such as `symbol_ref', `label_ref', and
1301 `high' expressions and `const' arithmetic expressions, in addition
1302 to `const_int' and `const_double' expressions. */
1304 #define MAX_REGS_PER_ADDRESS 1
1305 /* A number, the maximum number of registers that can appear in a
1306 valid memory address. Note that it is up to you to specify a
1307 value equal to the maximum number that `GO_IF_LEGITIMATE_ADDRESS'
1308 would ever accept. */
1310 #ifdef REG_OK_STRICT
1311 # define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
1313 if (legitimate_address_p (mode, operand, 1)) \
1317 # define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
1319 if (legitimate_address_p (mode, operand, 0)) \
1323 /* A C compound statement with a conditional `goto LABEL;' executed
1324 if X (an RTX) is a legitimate memory address on the target machine
1325 for a memory operand of mode MODE.
1327 It usually pays to define several simpler macros to serve as
1328 subroutines for this one. Otherwise it may be too complicated to
1331 This macro must exist in two variants: a strict variant and a
1332 non-strict one. The strict variant is used in the reload pass. It
1333 must be defined so that any pseudo-register that has not been
1334 allocated a hard register is considered a memory reference. In
1335 contexts where some kind of register is required, a pseudo-register
1336 with no hard register must be rejected.
1338 The non-strict variant is used in other passes. It must be
1339 defined to accept all pseudo-registers in every context where some
1340 kind of register is required.
1342 Compiler source files that want to use the strict variant of this
1343 macro define the macro `REG_OK_STRICT'. You should use an `#ifdef
1344 REG_OK_STRICT' conditional to define the strict variant in that
1345 case and the non-strict variant otherwise.
1347 Subroutines to check for acceptable registers for various purposes
1348 (one for base registers, one for index registers, and so on) are
1349 typically among the subroutines used to define
1350 `GO_IF_LEGITIMATE_ADDRESS'. Then only these subroutine macros
1351 need have two variants; the higher levels of macros may be the
1352 same whether strict or not.
1354 Normally, constant addresses which are the sum of a `symbol_ref'
1355 and an integer are stored inside a `const' RTX to mark them as
1356 constant. Therefore, there is no need to recognize such sums
1357 specifically as legitimate addresses. Normally you would simply
1358 recognize any `const' as legitimate.
1360 Usually `PRINT_OPERAND_ADDRESS' is not prepared to handle constant
1361 sums that are not marked with `const'. It assumes that a naked
1362 `plus' indicates indexing. If so, then you *must* reject such
1363 naked constant sums as illegitimate addresses, so that none of
1364 them will be given to `PRINT_OPERAND_ADDRESS'.
1366 On some machines, whether a symbolic address is legitimate depends
1367 on the section that the address refers to. On these machines,
1368 define the macro `ENCODE_SECTION_INFO' to store the information
1369 into the `symbol_ref', and then check for it here. When you see a
1370 `const', you will have to look inside it to find the `symbol_ref'
1371 in order to determine the section. *Note Assembler Format::.
1373 The best way to modify the name string is by adding text to the
1374 beginning, with suitable punctuation to prevent any ambiguity.
1375 Allocate the new name in `saveable_obstack'. You will have to
1376 modify `ASM_OUTPUT_LABELREF' to remove and decode the added text
1377 and output the name accordingly, and define `STRIP_NAME_ENCODING'
1378 to access the original name string.
1380 You can check the information stored here into the `symbol_ref' in
1381 the definitions of the macros `GO_IF_LEGITIMATE_ADDRESS' and
1382 `PRINT_OPERAND_ADDRESS'. */
1384 /* `REG_OK_FOR_BASE_P (X)'
1385 A C expression that is nonzero if X (assumed to be a `reg' RTX) is
1386 valid for use as a base register. For hard registers, it should
1387 always accept those which the hardware permits and reject the
1388 others. Whether the macro accepts or rejects pseudo registers
1389 must be controlled by `REG_OK_STRICT' as described above. This
1390 usually requires two variant definitions, of which `REG_OK_STRICT'
1391 controls the one actually used. */
1393 #define REG_OK_FOR_BASE_NOSTRICT_P(X) \
1394 (REGNO (X) >= FIRST_PSEUDO_REGISTER || REG_OK_FOR_BASE_STRICT_P(X))
1396 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
1398 #ifdef REG_OK_STRICT
1399 # define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P (X)
1401 # define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NOSTRICT_P (X)
1404 /* A C expression that is just like `REG_OK_FOR_BASE_P', except that
1405 that expression may examine the mode of the memory reference in
1406 MODE. You should define this macro if the mode of the memory
1407 reference affects whether a register may be used as a base
1408 register. If you define this macro, the compiler will use it
1409 instead of `REG_OK_FOR_BASE_P'. */
1410 #define REG_OK_FOR_INDEX_P(X) 0
1411 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is
1412 valid for use as an index register.
1414 The difference between an index register and a base register is
1415 that the index register may be scaled. If an address involves the
1416 sum of two registers, neither one of them scaled, then either one
1417 may be labeled the "base" and the other the "index"; but whichever
1418 labeling is used must fit the machine's constraints of which
1419 registers may serve in each capacity. The compiler will try both
1420 labelings, looking for one that is valid, and will reload one or
1421 both registers only if neither labeling works. */
1423 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
1425 (X) = legitimize_address (X, OLDX, MODE); \
1426 if (memory_address_p (MODE, X)) \
1429 /* A C compound statement that attempts to replace X with a valid
1430 memory address for an operand of mode MODE. WIN will be a C
1431 statement label elsewhere in the code; the macro definition may use
1433 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN);
1435 to avoid further processing if the address has become legitimate.
1437 X will always be the result of a call to `break_out_memory_refs',
1438 and OLDX will be the operand that was given to that function to
1441 The code generated by this macro should not alter the substructure
1442 of X. If it transforms X into a more legitimate form, it should
1443 assign X (which will always be a C variable) a new value.
1445 It is not necessary for this macro to come up with a legitimate
1446 address. The compiler has standard ways of doing so in all cases.
1447 In fact, it is safe for this macro to do nothing. But often a
1448 machine-dependent strategy can generate better code. */
1450 #define XEXP_(X,Y) (X)
1451 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN) \
1453 if (1&&(GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC)) \
1455 push_reload (XEXP (X,0), XEXP (X,0), &XEXP (X,0), &XEXP (X,0), \
1456 POINTER_REGS, GET_MODE (X),GET_MODE (X) , 0, 0, \
1457 OPNUM, RELOAD_OTHER); \
1460 if (GET_CODE (X) == PLUS \
1461 && REG_P (XEXP (X, 0)) \
1462 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1463 && INTVAL (XEXP (X, 1)) >= 1) \
1465 int fit = INTVAL (XEXP (X, 1)) <= (64 - GET_MODE_SIZE (MODE)); \
1468 if (reg_equiv_address[REGNO (XEXP (X, 0))] != 0) \
1470 int regno = REGNO (XEXP (X, 0)); \
1471 rtx mem = make_memloc (X, regno); \
1472 push_reload (XEXP (mem,0), NULL, &XEXP (mem,0), NULL, \
1473 POINTER_REGS, Pmode, VOIDmode, 0, 0, \
1474 1, ADDR_TYPE (TYPE)); \
1475 push_reload (mem, NULL_RTX, &XEXP (X, 0), NULL, \
1476 BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
1480 push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL, \
1481 BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
1485 else if (! (frame_pointer_needed && XEXP (X,0) == frame_pointer_rtx)) \
1487 push_reload (X, NULL_RTX, &X, NULL, \
1488 POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
1494 /* A C compound statement that attempts to replace X, which is an
1495 address that needs reloading, with a valid memory address for an
1496 operand of mode MODE. WIN will be a C statement label elsewhere
1497 in the code. It is not necessary to define this macro, but it
1498 might be useful for performance reasons.
1500 For example, on the i386, it is sometimes possible to use a single
1501 reload register instead of two by reloading a sum of two pseudo
1502 registers into a register. On the other hand, for number of RISC
1503 processors offsets are limited so that often an intermediate
1504 address needs to be generated in order to address a stack slot.
1505 By defining LEGITIMIZE_RELOAD_ADDRESS appropriately, the
1506 intermediate addresses generated for adjacent some stack slots can
1507 be made identical, and thus be shared.
1509 *Note*: This macro should be used with caution. It is necessary
1510 to know something of how reload works in order to effectively use
1511 this, and it is quite easy to produce macros that build in too
1512 much knowledge of reload internals.
1514 *Note*: This macro must be able to reload an address created by a
1515 previous invocation of this macro. If it fails to handle such
1516 addresses then the compiler may generate incorrect code or abort.
1518 The macro definition should use `push_reload' to indicate parts
1519 that need reloading; OPNUM, TYPE and IND_LEVELS are usually
1520 suitable to be passed unaltered to `push_reload'.
1522 The code generated by this macro must not alter the substructure of
1523 X. If it transforms X into a more legitimate form, it should
1524 assign X (which will always be a C variable) a new value. This
1525 also applies to parts that you change indirectly by calling
1528 The macro definition may use `strict_memory_address_p' to test if
1529 the address has become legitimate.
1531 If you want to change only a part of X, one standard way of doing
1532 this is to use `copy_rtx'. Note, however, that is unshares only a
1533 single level of rtl. Thus, if the part to be changed is not at the
1534 top level, you'll need to replace first the top leve It is not
1535 necessary for this macro to come up with a legitimate address;
1536 but often a machine-dependent strategy can generate better code. */
1538 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \
1539 if (GET_CODE (ADDR) == POST_INC || GET_CODE (ADDR) == PRE_DEC) \
1541 /* A C statement or compound statement with a conditional `goto
1542 LABEL;' executed if memory address X (an RTX) can have different
1543 meanings depending on the machine mode of the memory reference it
1544 is used for or if the address is valid for some modes but not
1547 Autoincrement and autodecrement addresses typically have
1548 mode-dependent effects because the amount of the increment or
1549 decrement is the size of the operand being addressed. Some
1550 machines have other mode-dependent addresses. Many RISC machines
1551 have no mode-dependent addresses.
1553 You may assume that ADDR is a valid address for the machine. */
1555 #define LEGITIMATE_CONSTANT_P(X) 1
1556 /* A C expression that is nonzero if X is a legitimate constant for
1557 an immediate operand on the target machine. You can assume that X
1558 satisfies `CONSTANT_P', so you need not check this. In fact, `1'
1559 is a suitable definition for this macro on machines where anything
1560 `CONSTANT_P' is valid. */
1562 #define CONST_COSTS(x,CODE,OUTER_CODE) \
1564 if (OUTER_CODE == PLUS \
1565 || OUTER_CODE == IOR \
1566 || OUTER_CODE == AND \
1567 || OUTER_CODE == MINUS \
1568 || OUTER_CODE == SET \
1569 || INTVAL (x) == 0) \
1571 if (OUTER_CODE == COMPARE \
1572 && INTVAL (x) >= 0 \
1573 && INTVAL (x) <= 255) \
1579 case CONST_DOUBLE: \
1582 /* A part of a C `switch' statement that describes the relative costs
1583 of constant RTL expressions. It must contain `case' labels for
1584 expression codes `const_int', `const', `symbol_ref', `label_ref'
1585 and `const_double'. Each case must ultimately reach a `return'
1586 statement to return the relative cost of the use of that kind of
1587 constant value in an expression. The cost may depend on the
1588 precise value of the constant, which is available for examination
1589 in X, and the rtx code of the expression in which it is contained,
1590 found in OUTER_CODE.
1592 CODE is the expression code--redundant, since it can be obtained
1593 with `GET_CODE (X)'. */
1595 #define DEFAULT_RTX_COSTS(x, code, outer_code) \
1597 int cst = default_rtx_costs (x, code, outer_code); \
1605 /* Like `CONST_COSTS' but applies to nonconstant RTL expressions.
1606 This can be used, for example, to indicate how costly a multiply
1607 instruction is. In writing this macro, you can use the construct
1608 `COSTS_N_INSNS (N)' to specify a cost equal to N fast
1609 instructions. OUTER_CODE is the code of the expression in which X
1612 This macro is optional; do not define it if the default cost
1613 assumptions are adequate for the target machine. */
1615 #define ADDRESS_COST(ADDRESS) avr_address_cost (ADDRESS)
1617 /* An expression giving the cost of an addressing mode that contains
1618 ADDRESS. If not defined, the cost is computed from the ADDRESS
1619 expression and the `CONST_COSTS' values.
1621 For most CISC machines, the default cost is a good approximation
1622 of the true cost of the addressing mode. However, on RISC
1623 machines, all instructions normally have the same length and
1624 execution time. Hence all addresses will have equal costs.
1626 In cases where more than one form of an address is known, the form
1627 with the lowest cost will be used. If multiple forms have the
1628 same, lowest, cost, the one that is the most complex will be used.
1630 For example, suppose an address that is equal to the sum of a
1631 register and a constant is used twice in the same basic block.
1632 When this macro is not defined, the address will be computed in a
1633 register and memory references will be indirect through that
1634 register. On machines where the cost of the addressing mode
1635 containing the sum is no higher than that of a simple indirect
1636 reference, this will produce an additional instruction and
1637 possibly require an additional register. Proper specification of
1638 this macro eliminates this overhead for such machines.
1640 Similar use of this macro is made in strength reduction of loops.
1642 ADDRESS need not be valid as an address. In such a case, the cost
1643 is not relevant and can be any value; invalid addresses need not be
1644 assigned a different cost.
1646 On machines where an address involving more than one register is as
1647 cheap as an address computation involving only one register,
1648 defining `ADDRESS_COST' to reflect this can cause two registers to
1649 be live over a region of code where only one would have been if
1650 `ADDRESS_COST' were not defined in that manner. This effect should
1651 be considered in the definition of this macro. Equivalent costs
1652 should probably only be given to addresses with different numbers
1653 of registers on machines with lots of registers.
1655 This macro will normally either not be defined or be defined as a
1658 #define REGISTER_MOVE_COST(MODE, FROM, TO) ((FROM) == STACK_REG ? 6 \
1659 : (TO) == STACK_REG ? 12 \
1661 /* A C expression for the cost of moving data from a register in class
1662 FROM to one in class TO. The classes are expressed using the
1663 enumeration values such as `GENERAL_REGS'. A value of 2 is the
1664 default; other values are interpreted relative to that.
1666 It is not required that the cost always equal 2 when FROM is the
1667 same as TO; on some machines it is expensive to move between
1668 registers if they are not general registers.
1670 If reload sees an insn consisting of a single `set' between two
1671 hard registers, and if `REGISTER_MOVE_COST' applied to their
1672 classes returns a value of 2, reload does not check to ensure that
1673 the constraints of the insn are met. Setting a cost of other than
1674 2 will allow reload to verify that the constraints are met. You
1675 should do this if the `movM' pattern's constraints do not allow
1678 #define MEMORY_MOVE_COST(MODE,CLASS,IN) ((MODE)==QImode ? 2 : \
1679 (MODE)==HImode ? 4 : \
1680 (MODE)==SImode ? 8 : \
1681 (MODE)==SFmode ? 8 : 16)
1682 /* A C expression for the cost of moving data of mode M between a
1683 register and memory. A value of 4 is the default; this cost is
1684 relative to those in `REGISTER_MOVE_COST'.
1686 If moving between registers and memory is more expensive than
1687 between two registers, you should define this macro to express the
1690 #define BRANCH_COST 0
1691 /* A C expression for the cost of a branch instruction. A value of 1
1692 is the default; other values are interpreted relative to that.
1694 Here are additional macros which do not specify precise relative
1695 costs, but only that certain actions are more expensive than GCC would
1696 ordinarily expect. */
1698 #define SLOW_BYTE_ACCESS 0
1699 /* Define this macro as a C expression which is nonzero if accessing
1700 less than a word of memory (i.e. a `char' or a `short') is no
1701 faster than accessing a word of memory, i.e., if such access
1702 require more than one instruction or if there is no difference in
1703 cost between byte and (aligned) word loads.
1705 When this macro is not defined, the compiler will access a field by
1706 finding the smallest containing object; when it is defined, a
1707 fullword load will be used if alignment permits. Unless bytes
1708 accesses are faster than word accesses, using word accesses is
1709 preferable since it may eliminate subsequent memory access if
1710 subsequent accesses occur to other fields in the same word of the
1711 structure, but to different bytes.
1713 `SLOW_UNALIGNED_ACCESS'
1714 Define this macro to be the value 1 if unaligned accesses have a
1715 cost many times greater than aligned accesses, for example if they
1716 are emulated in a trap handler.
1718 When this macro is non-zero, the compiler will act as if
1719 `STRICT_ALIGNMENT' were non-zero when generating code for block
1720 moves. This can cause significantly more instructions to be
1721 produced. Therefore, do not set this macro non-zero if unaligned
1722 accesses only add a cycle or two to the time for a memory access.
1724 If the value of this macro is always zero, it need not be defined.
1727 Define this macro to inhibit strength reduction of memory
1728 addresses. (On some machines, such strength reduction seems to do
1729 harm rather than good.)
1732 The number of scalar move insns which should be generated instead
1733 of a string move insn or a library call. Increasing the value
1734 will always make code faster, but eventually incurs high cost in
1735 increased code size.
1737 If you don't define this, a reasonable default is used. */
1739 #define NO_FUNCTION_CSE
1740 /* Define this macro if it is as good or better to call a constant
1741 function address than to call an address kept in a register. */
1743 #define NO_RECURSIVE_FUNCTION_CSE
1744 /* Define this macro if it is as good or better for a function to call
1745 itself with an explicit address than to call an address kept in a
1748 #define TEXT_SECTION_ASM_OP "\t.text"
1749 /* A C expression whose value is a string containing the assembler
1750 operation that should precede instructions and read-only data.
1751 Normally `"\t.text"' is right. */
1753 #define DATA_SECTION_ASM_OP "\t.data"
1754 /* A C expression whose value is a string containing the assembler
1755 operation to identify the following data as writable initialized
1756 data. Normally `"\t.data"' is right. */
1758 #define EXTRA_SECTIONS in_progmem
1759 /* A list of names for sections other than the standard two, which are
1760 `in_text' and `in_data'. You need not define this macro on a
1761 system with no other sections (that GCC needs to use). */
1763 #define EXTRA_SECTION_FUNCTIONS \
1766 progmem_section (void) \
1768 if (in_section != in_progmem) \
1770 fprintf (asm_out_file, \
1771 "\t.section .progmem.gcc_sw_table, \"%s\", @progbits\n", \
1772 AVR_MEGA ? "a" : "ax"); \
1773 /* Should already be aligned, this is just to be safe if it isn't. */ \
1774 fprintf (asm_out_file, "\t.p2align 1\n"); \
1775 in_section = in_progmem; \
1778 /* `EXTRA_SECTION_FUNCTIONS'
1779 One or more functions to be defined in `varasm.c'. These
1780 functions should do jobs analogous to those of `text_section' and
1781 `data_section', for your additional sections. Do not define this
1782 macro if you do not define `EXTRA_SECTIONS'. */
1784 #define READONLY_DATA_SECTION data_section
1785 /* On most machines, read-only variables, constants, and jump tables
1786 are placed in the text section. If this is not the case on your
1787 machine, this macro should be defined to be the name of a function
1788 (either `data_section' or a function defined in `EXTRA_SECTIONS')
1789 that switches to the section to be used for read-only items.
1791 If these items should be placed in the text section, this macro
1792 should not be defined. */
1794 /* `SELECT_RTX_SECTION (MODE, RTX, ALIGN)'
1795 A C statement or statements to switch to the appropriate section
1796 for output of RTX in mode MODE. You can assume that RTX is some
1797 kind of constant in RTL. The argument MODE is redundant except in
1798 the case of a `const_int' rtx. Select the section by calling
1799 `text_section' or one of the alternatives for other sections.
1801 Do not define this macro if you put all constants in the read-only
1804 #define JUMP_TABLES_IN_TEXT_SECTION 0
1805 /* Define this macro if jump tables (for `tablejump' insns) should be
1806 output in the text section, along with the assembler instructions.
1807 Otherwise, the readonly data section is used.
1809 This macro is irrelevant if there is no separate readonly data
1812 #define ENCODE_SECTION_INFO(DECL, FIRST) encode_section_info(DECL, FIRST)
1813 /* Define this macro if references to a symbol must be treated
1814 differently depending on something about the variable or function
1815 named by the symbol (such as what section it is in).
1817 The macro definition, if any, is executed immediately after the
1818 rtl for DECL has been created and stored in `DECL_RTL (DECL)'.
1819 The value of the rtl will be a `mem' whose address is a
1822 The usual thing for this macro to do is to record a flag in the
1823 `symbol_ref' (such as `SYMBOL_REF_FLAG') or to store a modified
1824 name string in the `symbol_ref' (if one bit is not enough
1827 #define STRIP_NAME_ENCODING(VAR,SYMBOL_NAME) \
1828 (VAR) = (SYMBOL_NAME) + ((SYMBOL_NAME)[0] == '*' || (SYMBOL_NAME)[0] == '@');
1829 /* `STRIP_NAME_ENCODING (VAR, SYM_NAME)'
1830 Decode SYM_NAME and store the real name part in VAR, sans the
1831 characters that encode section info. Define this macro if
1832 `ENCODE_SECTION_INFO' alters the symbol's name string. */
1834 #define ASM_FILE_START(STREAM) asm_file_start (STREAM)
1835 /* A C expression which outputs to the stdio stream STREAM some
1836 appropriate text to go at the start of an assembler file.
1838 Normally this macro is defined to output a line containing
1839 `#NO_APP', which is a comment that has no effect on most
1840 assemblers but tells the GNU assembler that it can save time by not
1841 checking for certain assembler constructs.
1843 On systems that use SDB, it is necessary to output certain
1844 commands; see `attasm.h'. */
1846 #define ASM_FILE_END(STREAM) asm_file_end (STREAM)
1847 /* A C expression which outputs to the stdio stream STREAM some
1848 appropriate text to go at the end of an assembler file.
1850 If this macro is not defined, the default is to output nothing
1851 special at the end of the file. Most systems don't require any
1854 On systems that use SDB, it is necessary to output certain
1855 commands; see `attasm.h'. */
1857 #define ASM_COMMENT_START " ; "
1858 /* A C string constant describing how to begin a comment in the target
1859 assembler language. The compiler assumes that the comment will
1860 end at the end of the line. */
1862 #define ASM_APP_ON "/* #APP */\n"
1863 /* A C string constant for text to be output before each `asm'
1864 statement or group of consecutive ones. Normally this is
1865 `"#APP"', which is a comment that has no effect on most assemblers
1866 but tells the GNU assembler that it must check the lines that
1867 follow for all valid assembler constructs. */
1869 #define ASM_APP_OFF "/* #NOAPP */\n"
1870 /* A C string constant for text to be output after each `asm'
1871 statement or group of consecutive ones. Normally this is
1872 `"#NO_APP"', which tells the GNU assembler to resume making the
1873 time-saving assumptions that are valid for ordinary compiler
1876 #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) fprintf (STREAM,"/* line: %d */\n",LINE)
1877 /* A C statement to output DBX or SDB debugging information before
1878 code for line number LINE of the current source file to the stdio
1881 This macro need not be defined if the standard form of debugging
1882 information for the debugger in use is appropriate. */
1884 /* Switch into a generic section. */
1885 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
1887 #define OBJC_PROLOGUE {}
1888 /* A C statement to output any assembler statements which are
1889 required to precede any Objective C object definitions or message
1890 sending. The statement is executed only when compiling an
1891 Objective C program. */
1894 #define ASM_OUTPUT_ASCII(FILE, P, SIZE) gas_output_ascii (FILE,P,SIZE)
1895 /* `ASM_OUTPUT_ASCII (STREAM, PTR, LEN)'
1896 output_ascii (FILE, P, SIZE)
1897 A C statement to output to the stdio stream STREAM an assembler
1898 instruction to assemble a string constant containing the LEN bytes
1899 at PTR. PTR will be a C expression of type `char *' and LEN a C
1900 expression of type `int'.
1902 If the assembler has a `.ascii' pseudo-op as found in the Berkeley
1903 Unix assembler, do not define the macro `ASM_OUTPUT_ASCII'. */
1905 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == '\n' \
1907 /* Define this macro as a C expression which is nonzero if C is used
1908 as a logical line separator by the assembler.
1910 If you do not define this macro, the default is that only the
1911 character `;' is treated as a logical line separator. */
1913 /* These macros are provided by `real.h' for writing the definitions of
1914 `ASM_OUTPUT_DOUBLE' and the like: */
1916 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \
1918 fputs ("\t.comm ", (STREAM)); \
1919 assemble_name ((STREAM), (NAME)); \
1920 fprintf ((STREAM), ",%d,1\n", (SIZE)); \
1922 /* A C statement (sans semicolon) to output to the stdio stream
1923 STREAM the assembler definition of a common-label named NAME whose
1924 size is SIZE bytes. The variable ROUNDED is the size rounded up
1925 to whatever alignment the caller wants.
1927 Use the expression `assemble_name (STREAM, NAME)' to output the
1928 name itself; before and after that, output the additional
1929 assembler syntax for defining the name, and a newline.
1931 This macro controls how the assembler definitions of uninitialized
1932 common global variables are output. */
1934 #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) \
1936 fputs ("\t.lcomm ", (STREAM)); \
1937 assemble_name ((STREAM), (NAME)); \
1938 fprintf ((STREAM), ",%d\n", (SIZE)); \
1940 /* A C statement (sans semicolon) to output to the stdio stream
1941 STREAM the assembler definition of a local-common-label named NAME
1942 whose size is SIZE bytes. The variable ROUNDED is the size
1943 rounded up to whatever alignment the caller wants.
1945 Use the expression `assemble_name (STREAM, NAME)' to output the
1946 name itself; before and after that, output the additional
1947 assembler syntax for defining the name, and a newline.
1949 This macro controls how the assembler definitions of uninitialized
1950 static variables are output. */
1952 #define ASM_OUTPUT_LABEL(STREAM, NAME) \
1954 assemble_name (STREAM, NAME); \
1955 fprintf (STREAM, ":\n"); \
1957 /* A C statement (sans semicolon) to output to the stdio stream
1958 STREAM the assembler definition of a label named NAME. Use the
1959 expression `assemble_name (STREAM, NAME)' to output the name
1960 itself; before and after that, output the additional assembler
1961 syntax for defining the name, and a newline. */
1966 #define TYPE_ASM_OP "\t.type\t"
1967 #define SIZE_ASM_OP "\t.size\t"
1968 #define WEAK_ASM_OP "\t.weak\t"
1969 /* Define the strings used for the special svr4 .type and .size directives.
1970 These strings generally do not vary from one system running svr4 to
1971 another, but if a given system (e.g. m88k running svr) needs to use
1972 different pseudo-op names for these, they may be overridden in the
1973 file which includes this one. */
1976 #undef TYPE_OPERAND_FMT
1977 #define TYPE_OPERAND_FMT "@%s"
1978 /* The following macro defines the format used to output the second
1979 operand of the .type assembler directive. Different svr4 assemblers
1980 expect various different forms for this operand. The one given here
1981 is just a default. You may need to override it in your machine-
1982 specific tm.h file (depending upon the particulars of your assembler). */
1985 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
1987 fprintf (FILE, "%s", TYPE_ASM_OP); \
1988 assemble_name (FILE, NAME); \
1990 fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
1991 putc ('\n', FILE); \
1992 ASM_OUTPUT_LABEL (FILE, NAME); \
1994 /* A C statement (sans semicolon) to output to the stdio stream
1995 STREAM any text necessary for declaring the name NAME of a
1996 function which is being defined. This macro is responsible for
1997 outputting the label definition (perhaps using
1998 `ASM_OUTPUT_LABEL'). The argument DECL is the `FUNCTION_DECL'
1999 tree node representing the function.
2001 If this macro is not defined, then the function name is defined in
2002 the usual manner as a label (by means of `ASM_OUTPUT_LABEL'). */
2004 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
2006 if (!flag_inhibit_size_directive) \
2009 static int labelno; \
2011 ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \
2012 ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \
2013 fprintf (FILE, "%s", SIZE_ASM_OP); \
2014 assemble_name (FILE, (FNAME)); \
2015 fprintf (FILE, ","); \
2016 assemble_name (FILE, label); \
2017 fprintf (FILE, "-"); \
2018 assemble_name (FILE, (FNAME)); \
2019 putc ('\n', FILE); \
2022 /* A C statement (sans semicolon) to output to the stdio stream
2023 STREAM any text necessary for declaring the size of a function
2024 which is being defined. The argument NAME is the name of the
2025 function. The argument DECL is the `FUNCTION_DECL' tree node
2026 representing the function.
2028 If this macro is not defined, then the function size is not
2031 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
2033 fprintf (FILE, "%s", TYPE_ASM_OP); \
2034 assemble_name (FILE, NAME); \
2036 fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
2037 putc ('\n', FILE); \
2038 size_directive_output = 0; \
2039 if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
2041 size_directive_output = 1; \
2042 fprintf (FILE, "%s", SIZE_ASM_OP); \
2043 assemble_name (FILE, NAME); \
2044 fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
2046 ASM_OUTPUT_LABEL(FILE, NAME); \
2048 /* A C statement (sans semicolon) to output to the stdio stream
2049 STREAM any text necessary for declaring the name NAME of an
2050 initialized variable which is being defined. This macro must
2051 output the label definition (perhaps using `ASM_OUTPUT_LABEL').
2052 The argument DECL is the `VAR_DECL' tree node representing the
2055 If this macro is not defined, then the variable name is defined in
2056 the usual manner as a label (by means of `ASM_OUTPUT_LABEL'). */
2058 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
2060 const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
2061 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
2062 && ! AT_END && TOP_LEVEL \
2063 && DECL_INITIAL (DECL) == error_mark_node \
2064 && !size_directive_output) \
2066 size_directive_output = 1; \
2067 fprintf (FILE, "%s", SIZE_ASM_OP); \
2068 assemble_name (FILE, name); \
2069 fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \
2072 /* A C statement (sans semicolon) to finish up declaring a variable
2073 name once the compiler has processed its initializer fully and
2074 thus has had a chance to determine the size of an array when
2075 controlled by an initializer. This is used on systems where it's
2076 necessary to declare something about the size of the object.
2078 If you don't define this macro, that is equivalent to defining it
2083 "\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\
2084 \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\
2085 \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\
2086 \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\
2087 \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\
2088 \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\
2089 \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\
2090 \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"
2091 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
2092 ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table
2093 corresponds to a particular byte value [0..255]. For any
2094 given byte value, if the value in the corresponding table
2095 position is zero, the given character can be output directly.
2096 If the table value is 1, the byte must be output as a \ooo
2097 octal escape. If the tables value is anything else, then the
2098 byte value should be output as a \ followed by the value
2099 in the table. Note that we can use standard UN*X escape
2100 sequences for many control characters, but we don't use
2101 \a to represent BEL because some svr4 assemblers (e.g. on
2102 the i386) don't know about that. Also, we don't use \v
2103 since some versions of gas, such as 2.2 did not accept it. */
2105 #define STRING_LIMIT ((unsigned) 64)
2106 #define STRING_ASM_OP "\t.string\t"
2107 /* Some svr4 assemblers have a limit on the number of characters which
2108 can appear in the operand of a .string directive. If your assembler
2109 has such a limitation, you should define STRING_LIMIT to reflect that
2110 limit. Note that at least some svr4 assemblers have a limit on the
2111 actual number of bytes in the double-quoted string, and that they
2112 count each character in an escape sequence as one byte. Thus, an
2113 escape sequence like \377 would count as four bytes.
2115 If your target assembler doesn't support the .string directive, you
2116 should define this to zero. */
2118 #define ASM_GLOBALIZE_LABEL(STREAM, NAME) \
2120 fprintf (STREAM, ".global\t"); \
2121 assemble_name (STREAM, NAME); \
2122 fprintf (STREAM, "\n"); \
2126 /* A C statement (sans semicolon) to output to the stdio stream
2127 STREAM some commands that will make the label NAME global; that
2128 is, available for reference from other files. Use the expression
2129 `assemble_name (STREAM, NAME)' to output the name itself; before
2130 and after that, output the additional assembler syntax for making
2131 that name global, and a newline. */
2133 #define ASM_WEAKEN_LABEL(FILE, NAME) \
2136 fputs ("\t.weak\t", (FILE)); \
2137 assemble_name ((FILE), (NAME)); \
2138 fputc ('\n', (FILE)); \
2142 /* A C statement (sans semicolon) to output to the stdio stream
2143 STREAM some commands that will make the label NAME weak; that is,
2144 available for reference from other files but only used if no other
2145 definition is available. Use the expression `assemble_name
2146 (STREAM, NAME)' to output the name itself; before and after that,
2147 output the additional assembler syntax for making that name weak,
2150 If you don't define this macro, GNU CC will not support weak
2151 symbols and you should not define the `SUPPORTS_WEAK' macro.
2154 #define SUPPORTS_WEAK 1
2155 /* A C expression which evaluates to true if the target supports weak
2158 If you don't define this macro, `defaults.h' provides a default
2159 definition. If `ASM_WEAKEN_LABEL' is defined, the default
2160 definition is `1'; otherwise, it is `0'. Define this macro if you
2161 want to control weak symbol support with a compiler flag such as
2164 `MAKE_DECL_ONE_ONLY'
2165 A C statement (sans semicolon) to mark DECL to be emitted as a
2166 public symbol such that extra copies in multiple translation units
2167 will be discarded by the linker. Define this macro if your object
2168 file format provides support for this concept, such as the `COMDAT'
2169 section flags in the Microsoft Windows PE/COFF format, and this
2170 support requires changes to DECL, such as putting it in a separate
2174 A C expression which evaluates to true if the target supports
2177 If you don't define this macro, `varasm.c' provides a default
2178 definition. If `MAKE_DECL_ONE_ONLY' is defined, the default
2179 definition is `1'; otherwise, it is `0'. Define this macro if you
2180 want to control weak symbol support with a compiler flag, or if
2181 setting the `DECL_ONE_ONLY' flag is enough to mark a declaration to
2182 be emitted as one-only. */
2184 #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) \
2185 fprintf(STREAM, ".%s%d:\n", PREFIX, NUM)
2186 /* A C statement to output to the stdio stream STREAM a label whose
2187 name is made from the string PREFIX and the number NUM.
2189 It is absolutely essential that these labels be distinct from the
2190 labels used for user-level functions and variables. Otherwise,
2191 certain programs will have name conflicts with internal labels.
2193 It is desirable to exclude internal labels from the symbol table
2194 of the object file. Most assemblers have a naming convention for
2195 labels that should be excluded; on many systems, the letter `L' at
2196 the beginning of a label has this effect. You should find out what
2197 convention your system uses, and follow it.
2199 The usual definition of this macro is as follows:
2201 fprintf (STREAM, "L%s%d:\n", PREFIX, NUM) */
2203 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM) \
2204 sprintf (STRING, "*.%s%d", PREFIX, NUM)
2205 /* A C statement to store into the string STRING a label whose name
2206 is made from the string PREFIX and the number NUM.
2208 This string, when output subsequently by `assemble_name', should
2209 produce the output that `ASM_OUTPUT_INTERNAL_LABEL' would produce
2210 with the same PREFIX and NUM.
2212 If the string begins with `*', then `assemble_name' will output
2213 the rest of the string unchanged. It is often convenient for
2214 `ASM_GENERATE_INTERNAL_LABEL' to use `*' in this way. If the
2215 string doesn't start with `*', then `ASM_OUTPUT_LABELREF' gets to
2216 output the string, and may change it. (Of course,
2217 `ASM_OUTPUT_LABELREF' is also part of your machine description, so
2218 you should know what it does on your machine.) */
2220 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
2221 ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \
2222 sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
2224 /* A C expression to assign to OUTVAR (which is a variable of type
2225 `char *') a newly allocated string made from the string NAME and
2226 the number NUMBER, with some suitable punctuation added. Use
2227 `alloca' to get space for the string.
2229 The string will be used as an argument to `ASM_OUTPUT_LABELREF' to
2230 produce an assembler label for an internal static variable whose
2231 name is NAME. Therefore, the string must be such as to result in
2232 valid assembler code. The argument NUMBER is different each time
2233 this macro is executed; it prevents conflicts between
2234 similarly-named internal static variables in different scopes.
2236 Ideally this string should not be a valid C identifier, to prevent
2237 any conflict with the user's own symbols. Most assemblers allow
2238 periods or percent signs in assembler symbols; putting at least
2239 one of these between the name and the number will suffice. */
2241 /* `ASM_OUTPUT_WEAK_ALIAS (STREAM, NAME, VALUE)'
2242 A C statement to output to the stdio stream STREAM assembler code
2243 which defines (equates) the weak symbol NAME to have the value
2246 Define this macro if the target only supports weak aliases; define
2247 ASM_OUTPUT_DEF instead if possible. */
2249 #define HAS_INIT_SECTION 1
2250 /* If defined, `main' will not call `__main' as described above.
2251 This macro should be defined for systems that control the contents
2252 of the init section on a symbol-by-symbol basis, such as OSF/1,
2253 and should not be defined explicitly for systems that support
2254 `INIT_SECTION_ASM_OP'. */
2256 #define REGISTER_NAMES { \
2257 "r0","r1","r2","r3","r4","r5","r6","r7", \
2258 "r8","r9","r10","r11","r12","r13","r14","r15", \
2259 "r16","r17","r18","r19","r20","r21","r22","r23", \
2260 "r24","r25","r26","r27","r28","r29","r30","r31", \
2261 "__SPL__","__SPH__","argL","argH"}
2262 /* A C initializer containing the assembler's names for the machine
2263 registers, each one as a C string constant. This is what
2264 translates register numbers in the compiler into assembler
2267 #define FINAL_PRESCAN_INSN(insn, operand, nop) final_prescan_insn (insn, operand,nop)
2268 /* If defined, a C statement to be executed just prior to the output
2269 of assembler code for INSN, to modify the extracted operands so
2270 they will be output differently.
2272 Here the argument OPVEC is the vector containing the operands
2273 extracted from INSN, and NOPERANDS is the number of elements of
2274 the vector which contain meaningful data for this insn. The
2275 contents of this vector are what will be used to convert the insn
2276 template into assembler code, so you can change the assembler
2277 output by changing the contents of the vector.
2279 This macro is useful when various assembler syntaxes share a single
2280 file of instruction patterns; by defining this macro differently,
2281 you can cause a large class of instructions to be output
2282 differently (such as with rearranged operands). Naturally,
2283 variations in assembler syntax affecting individual insn patterns
2284 ought to be handled by writing conditional output routines in
2287 If this macro is not defined, it is equivalent to a null statement. */
2289 #define PRINT_OPERAND(STREAM, X, CODE) print_operand (STREAM, X, CODE)
2290 /* A C compound statement to output to stdio stream STREAM the
2291 assembler syntax for an instruction operand X. X is an RTL
2294 CODE is a value that can be used to specify one of several ways of
2295 printing the operand. It is used when identical operands must be
2296 printed differently depending on the context. CODE comes from the
2297 `%' specification that was used to request printing of the
2298 operand. If the specification was just `%DIGIT' then CODE is 0;
2299 if the specification was `%LTR DIGIT' then CODE is the ASCII code
2302 If X is a register, this macro should print the register's name.
2303 The names can be found in an array `reg_names' whose type is `char
2304 *[]'. `reg_names' is initialized from `REGISTER_NAMES'.
2306 When the machine description has a specification `%PUNCT' (a `%'
2307 followed by a punctuation character), this macro is called with a
2308 null pointer for X and the punctuation character for CODE. */
2310 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '~')
2311 /* A C expression which evaluates to true if CODE is a valid
2312 punctuation character for use in the `PRINT_OPERAND' macro. If
2313 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no
2314 punctuation characters (except for the standard one, `%') are used
2317 #define PRINT_OPERAND_ADDRESS(STREAM, X) print_operand_address(STREAM, X)
2318 /* A C compound statement to output to stdio stream STREAM the
2319 assembler syntax for an instruction operand that is a memory
2320 reference whose address is X. X is an RTL expression.
2322 On some machines, the syntax for a symbolic address depends on the
2323 section that the address refers to. On these machines, define the
2324 macro `ENCODE_SECTION_INFO' to store the information into the
2325 `symbol_ref', and then check for it here. *Note Assembler
2328 #define USER_LABEL_PREFIX ""
2329 /* `LOCAL_LABEL_PREFIX'
2332 If defined, C string expressions to be used for the `%R', `%L',
2333 `%U', and `%I' options of `asm_fprintf' (see `final.c'). These
2334 are useful when a single `md' file must support multiple assembler
2335 formats. In that case, the various `tm.h' files can define these
2336 macros differently. */
2338 #define ASSEMBLER_DIALECT AVR_ENHANCED
2339 /* If your target supports multiple dialects of assembler language
2340 (such as different opcodes), define this macro as a C expression
2341 that gives the numeric index of the assembler language dialect to
2342 use, with zero as the first variant.
2344 If this macro is defined, you may use constructs of the form
2345 `{option0|option1|option2...}' in the output templates of patterns
2346 (*note Output Template::.) or in the first argument of
2347 `asm_fprintf'. This construct outputs `option0', `option1' or
2348 `option2', etc., if the value of `ASSEMBLER_DIALECT' is zero, one
2349 or two, etc. Any special characters within these strings retain
2350 their usual meaning.
2352 If you do not define this macro, the characters `{', `|' and `}'
2353 do not have any special meaning when used in templates or operands
2356 Define the macros `REGISTER_PREFIX', `LOCAL_LABEL_PREFIX',
2357 `USER_LABEL_PREFIX' and `IMMEDIATE_PREFIX' if you can express the
2358 variations in assembler language syntax with that mechanism.
2359 Define `ASSEMBLER_DIALECT' and use the `{option0|option1}' syntax
2360 if the syntax variant are larger and involve such things as
2361 different opcodes or operand order. */
2363 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \
2367 fprintf (STREAM, "\tpush\tr%d", REGNO); \
2369 /* A C expression to output to STREAM some assembler code which will
2370 push hard register number REGNO onto the stack. The code need not
2371 be optimal, since this macro is used only when profiling. */
2373 #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \
2377 fprintf (STREAM, "\tpop\tr%d", REGNO); \
2379 /* A C expression to output to STREAM some assembler code which will
2380 pop hard register number REGNO off of the stack. The code need
2381 not be optimal, since this macro is used only when profiling. */
2383 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
2384 avr_output_addr_vec_elt(STREAM, VALUE)
2385 /* This macro should be provided on machines where the addresses in a
2386 dispatch table are absolute.
2388 The definition should be a C statement to output to the stdio
2389 stream STREAM an assembler pseudo-instruction to generate a
2390 reference to a label. VALUE is the number of an internal label
2391 whose definition is output using `ASM_OUTPUT_INTERNAL_LABEL'. For
2394 fprintf (STREAM, "\t.word L%d\n", VALUE) */
2396 #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) \
2397 progmem_section (), ASM_OUTPUT_INTERNAL_LABEL (STREAM, PREFIX, NUM)
2399 /* `ASM_OUTPUT_CASE_LABEL (STREAM, PREFIX, NUM, TABLE)'
2400 Define this if the label before a jump-table needs to be output
2401 specially. The first three arguments are the same as for
2402 `ASM_OUTPUT_INTERNAL_LABEL'; the fourth argument is the jump-table
2403 which follows (a `jump_insn' containing an `addr_vec' or
2406 This feature is used on system V to output a `swbeg' statement for
2409 If this macro is not defined, these labels are output with
2410 `ASM_OUTPUT_INTERNAL_LABEL'. */
2412 /* `ASM_OUTPUT_CASE_END (STREAM, NUM, TABLE)'
2413 Define this if something special must be output at the end of a
2414 jump-table. The definition should be a C statement to be executed
2415 after the assembler code for the table is written. It should write
2416 the appropriate code to stdio stream STREAM. The argument TABLE
2417 is the jump-table insn, and NUM is the label-number of the
2420 If this macro is not defined, nothing special is output at the end
2421 of the jump-table. */
2423 #define ASM_OUTPUT_SKIP(STREAM, N) \
2424 fprintf (STREAM, "\t.skip %d,0\n", N)
2425 /* A C statement to output to the stdio stream STREAM an assembler
2426 instruction to advance the location counter by NBYTES bytes.
2427 Those bytes should be zero when loaded. NBYTES will be a C
2428 expression of type `int'. */
2430 #define ASM_OUTPUT_ALIGN(STREAM, POWER)
2431 /* A C statement to output to the stdio stream STREAM an assembler
2432 command to advance the location counter to a multiple of 2 to the
2433 POWER bytes. POWER will be a C expression of type `int'. */
2435 #define CASE_VECTOR_MODE HImode
2436 /* An alias for a machine mode name. This is the machine mode that
2437 elements of a jump-table should have. */
2439 extern int avr_case_values_threshold;
2441 #define CASE_VALUES_THRESHOLD avr_case_values_threshold
2442 /* `CASE_VALUES_THRESHOLD'
2443 Define this to be the smallest number of different values for
2444 which it is best to use a jump-table instead of a tree of
2445 conditional branches. The default is four for machines with a
2446 `casesi' instruction and five otherwise. This is best for most
2449 #undef WORD_REGISTER_OPERATIONS
2450 /* Define this macro if operations between registers with integral
2451 mode smaller than a word are always performed on the entire
2452 register. Most RISC machines have this property and most CISC
2456 /* The maximum number of bytes that a single instruction can move
2457 quickly between memory and registers or between two memory
2460 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
2461 /* A C expression which is nonzero if on this machine it is safe to
2462 "convert" an integer of INPREC bits to one of OUTPREC bits (where
2463 OUTPREC is smaller than INPREC) by merely operating on it as if it
2464 had only OUTPREC bits.
2466 On many machines, this expression can be 1.
2468 When `TRULY_NOOP_TRUNCATION' returns 1 for a pair of sizes for
2469 modes for which `MODES_TIEABLE_P' is 0, suboptimal code can result.
2470 If this is the case, making `TRULY_NOOP_TRUNCATION' return 0 in
2471 such cases may improve things. */
2473 #define Pmode HImode
2474 /* An alias for the machine mode for pointers. On most machines,
2475 define this to be the integer mode corresponding to the width of a
2476 hardware pointer; `SImode' on 32-bit machine or `DImode' on 64-bit
2477 machines. On some machines you must define this to be one of the
2478 partial integer modes, such as `PSImode'.
2480 The width of `Pmode' must be at least as large as the value of
2481 `POINTER_SIZE'. If it is not equal, you must define the macro
2482 `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to
2485 #define FUNCTION_MODE HImode
2486 /* An alias for the machine mode used for memory references to
2487 functions being called, in `call' RTL expressions. On most
2488 machines this should be `QImode'. */
2490 #define INTEGRATE_THRESHOLD(DECL) (1 + (3 * list_length (DECL_ARGUMENTS (DECL)) / 2))
2492 /* A C expression for the maximum number of instructions above which
2493 the function DECL should not be inlined. DECL is a
2494 `FUNCTION_DECL' node.
2496 The default definition of this macro is 64 plus 8 times the number
2497 of arguments that the function accepts. Some people think a larger
2498 threshold should be used on RISC machines. */
2500 #define DOLLARS_IN_IDENTIFIERS 0
2501 /* Define this macro to control use of the character `$' in identifier
2502 names. 0 means `$' is not allowed by default; 1 means it is
2503 allowed. 1 is the default; there is no need to define this macro
2504 in that case. This macro controls the compiler proper; it does
2505 not affect the preprocessor. */
2507 #define NO_DOLLAR_IN_LABEL 1
2508 /* Define this macro if the assembler does not accept the character
2509 `$' in label names. By default constructors and destructors in
2510 G++ have `$' in the identifiers. If this macro is defined, `.' is
2513 #define MACHINE_DEPENDENT_REORG(INSN) machine_dependent_reorg (INSN)
2514 /* In rare cases, correct code generation requires extra machine
2515 dependent processing between the second jump optimization pass and
2516 delayed branch scheduling. On those machines, define this macro
2517 as a C statement to act on the code starting at INSN. */
2519 #define GIV_SORT_CRITERION(X, Y) \
2520 if (GET_CODE ((X)->add_val) == CONST_INT \
2521 && GET_CODE ((Y)->add_val) == CONST_INT) \
2522 return INTVAL ((X)->add_val) - INTVAL ((Y)->add_val);
2524 /* `GIV_SORT_CRITERION(GIV1, GIV2)'
2525 In some cases, the strength reduction optimization pass can
2526 produce better code if this is defined. This macro controls the
2527 order that induction variables are combined. This macro is
2528 particularly useful if the target has limited addressing modes.
2529 For instance, the SH target has only positive offsets in
2530 addresses. Thus sorting to put the smallest address first allows
2531 the most combinations to be found. */
2533 #define TRAMPOLINE_TEMPLATE(FILE) \
2534 internal_error ("trampolines not supported")
2536 /* Length in units of the trampoline for entering a nested function. */
2538 #define TRAMPOLINE_SIZE 4
2540 /* Emit RTL insns to initialize the variable parts of a trampoline.
2541 FNADDR is an RTX for the address of the function's pure code.
2542 CXT is an RTX for the static chain value for the function. */
2544 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
2546 emit_move_insn (gen_rtx (MEM, HImode, plus_constant ((TRAMP), 2)), CXT); \
2547 emit_move_insn (gen_rtx (MEM, HImode, plus_constant ((TRAMP), 6)), FNADDR); \
2549 /* Store in cc_status the expressions
2550 that the condition codes will describe
2551 after execution of an instruction whose pattern is EXP.
2552 Do not alter them if the instruction would not alter the cc's. */
2554 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
2556 /* The add insns don't set overflow in a usable way. */
2557 #define CC_OVERFLOW_UNUSABLE 01000
2558 /* The mov,and,or,xor insns don't set carry. That's ok though as the
2559 Z bit is all we need when doing unsigned comparisons on the result of
2560 these insns (since they're always with 0). However, conditions.h has
2561 CC_NO_OVERFLOW defined for this purpose. Rename it to something more
2563 #define CC_NO_CARRY CC_NO_OVERFLOW
2566 /* Output assembler code to FILE to increment profiler label # LABELNO
2567 for profiling a function entry. */
2569 #define FUNCTION_PROFILER(FILE, LABELNO) \
2570 fprintf (FILE, "/* profiler %d */", (LABELNO))
2572 /* `FIRST_INSN_ADDRESS'
2573 When the `length' insn attribute is used, this macro specifies the
2574 value to be assigned to the address of the first insn in a
2575 function. If not specified, 0 is used. */
2577 #define ADJUST_INSN_LENGTH(INSN, LENGTH) (LENGTH =\
2578 adjust_insn_length (INSN, LENGTH))
2579 /* If defined, modifies the length assigned to instruction INSN as a
2580 function of the context in which it is used. LENGTH is an lvalue
2581 that contains the initially computed length of the insn and should
2582 be updated with the correct length of the insn. If updating is
2583 required, INSN must not be a varying-length insn.
2585 This macro will normally not be required. A case in which it is
2586 required is the ROMP. On this machine, the size of an `addr_vec'
2587 insn must be increased by two to compensate for the fact that
2588 alignment may be required. */
2590 #define TARGET_MEM_FUNCTIONS
2591 /* Define this macro if GNU CC should generate calls to the System V
2592 (and ANSI C) library functions `memcpy' and `memset' rather than
2593 the BSD functions `bcopy' and `bzero'. */
2596 %{!mmcu*|mmcu=avr2:%(cpp_avr2)} \
2597 %{mmcu=at90s2313:%(cpp_avr2) -D__AVR_AT90S2313__} \
2598 %{mmcu=at90s2323:%(cpp_avr2) -D__AVR_AT90S2323__} \
2599 %{mmcu=at90s2333:%(cpp_avr2) -D__AVR_AT90S2333__} \
2600 %{mmcu=at90s2343:%(cpp_avr2) -D__AVR_AT90S2343__} \
2601 %{mmcu=attiny22: %(cpp_avr2) -D__AVR_ATtiny22__} \
2602 %{mmcu=attiny26: %(cpp_avr2) -D__AVR_ATtiny26__} \
2603 %{mmcu=at90s4433:%(cpp_avr2) -D__AVR_AT90S4433__} \
2604 %{mmcu=at90s4414:%(cpp_avr2) -D__AVR_AT90S4414__} \
2605 %{mmcu=at90s4434:%(cpp_avr2) -D__AVR_AT90S4434__} \
2606 %{mmcu=at90s8515:%(cpp_avr2) -D__AVR_AT90S8515__} \
2607 %{mmcu=at90s8535:%(cpp_avr2) -D__AVR_AT90S8535__} \
2608 %{mmcu=at90c8534:%(cpp_avr2) -D__AVR_AT90C8534__} \
2609 %{mmcu=avr3:%(cpp_avr3)} \
2610 %{mmcu=atmega603:%(cpp_avr3) -D__AVR_ATmega603__} \
2611 %{mmcu=atmega103:%(cpp_avr3) -D__AVR_ATmega103__} \
2612 %{mmcu=at43usb320:%(cpp_avr3) -D__AVR_AT43USB320__} \
2613 %{mmcu=at43usb355:%(cpp_avr3) -D__AVR_AT43USB355__} \
2614 %{mmcu=at76c711: %(cpp_avr3) -D__AVR_AT76C711__} \
2615 %{mmcu=avr4:%(cpp_avr4)} \
2616 %{mmcu=atmega8: %(cpp_avr4) -D__AVR_ATmega8__} \
2617 %{mmcu=atmega83: %(cpp_avr4) -D__AVR_ATmega83__} \
2618 %{mmcu=atmega85: %(cpp_avr4) -D__AVR_ATmega85__} \
2619 %{mmcu=atmega8515: %(cpp_avr4) -D__AVR_ATmega8515__} \
2620 %{mmcu=avr5:%(cpp_avr5)} \
2621 %{mmcu=atmega16: %(cpp_avr5) -D__AVR_ATmega16__} \
2622 %{mmcu=atmega161:%(cpp_avr5) -D__AVR_ATmega161__} \
2623 %{mmcu=atmega162:%(cpp_avr5) -D__AVR_ATmega162__} \
2624 %{mmcu=atmega163:%(cpp_avr5) -D__AVR_ATmega163__} \
2625 %{mmcu=atmega32: %(cpp_avr5) -D__AVR_ATmega32__} \
2626 %{mmcu=atmega323:%(cpp_avr5) -D__AVR_ATmega323__} \
2627 %{mmcu=atmega64: %(cpp_avr5) -D__AVR_ATmega64__} \
2628 %{mmcu=atmega128:%(cpp_avr5) -D__AVR_ATmega128__} \
2629 %{mmcu=at94k: %(cpp_avr5) -D__AVR_AT94K__} \
2630 %{mmcu=avr1:%(cpp_avr1)} \
2631 %{mmcu=at90s1200:%(cpp_avr1) -D__AVR_AT90S1200__} \
2632 %{mmcu=attiny10|mmcu=attiny11: %(cpp_avr1) -D__AVR_ATtiny11__} \
2633 %{mmcu=attiny12: %(cpp_avr1) -D__AVR_ATtiny12__} \
2634 %{mmcu=attiny15: %(cpp_avr1) -D__AVR_ATtiny15__} \
2635 %{mmcu=attiny28: %(cpp_avr1) -D__AVR_ATtiny28__} \
2636 %{mno-interrupts:-D__NO_INTERRUPTS__} \
2637 %{mint8:-D__INT_MAX__=127} \
2638 %{!mint*:-D__INT_MAX__=32767} \
2639 %{posix:-D_POSIX_SOURCE}"
2640 /* A C string constant that tells the GNU CC driver program options to
2641 pass to CPP. It can also specify how to translate options you
2642 give to GNU CC into options for GNU CC to pass to the CPP.
2644 Do not define this macro if it does not need to do anything. */
2646 #define CC1_SPEC "%{profile:-p}"
2647 /* A C string constant that tells the GNU CC driver program options to
2648 pass to `cc1'. It can also specify how to translate options you
2649 give to GNU CC into options for GNU CC to pass to the `cc1'.
2651 Do not define this macro if it does not need to do anything. */
2653 #define ASM_SPEC "%{mmcu=*:-mmcu=%*}"
2654 /* A C string constant that tells the GNU CC driver program options to
2655 pass to the assembler. It can also specify how to translate
2656 options you give to GNU CC into options for GNU CC to pass to the
2657 assembler. See the file `sun3.h' for an example of this.
2659 Do not define this macro if it does not need to do anything. */
2661 #define ASM_FINAL_SPEC ""
2662 /* A C string constant that tells the GNU CC driver program how to
2663 run any programs which cleanup after the normal assembler.
2664 Normally, this is not needed. See the file `mips.h' for an
2667 Do not define this macro if it does not need to do anything. */
2669 #define LINK_SPEC "\
2670 %{!mmcu*:-m avr85xx} \
2671 %{mmcu=atmega603:-m avrmega603} \
2672 %{mmcu=atmega103:-m avrmega103} \
2673 %{mmcu=at43usb320:-m avr3} \
2674 %{mmcu=at43usb355:-m avr3} \
2675 %{mmcu=at76c711:-m avr3} \
2676 %{mmcu=atmega16:-m avrmega161} \
2677 %{mmcu=atmega161:-m avrmega161} \
2678 %{mmcu=atmega162:-m avr5 -Tdata 0x800100} \
2679 %{mmcu=atmega163:-m avrmega161} \
2680 %{mmcu=atmega32:-m avr5} \
2681 %{mmcu=atmega323:-m avr5} \
2682 %{mmcu=atmega64:-m avr5 -Tdata 0x800100} \
2683 %{mmcu=atmega128:-m avr5 -Tdata 0x800100} \
2684 %{mmcu=at94k:-m avr5} \
2685 %{mmcu=atmega8:-m avr4} \
2686 %{mmcu=atmega83:-m avr4} \
2687 %{mmcu=atmega85:-m avr4} \
2688 %{mmcu=atmega8515:-m avr4} \
2689 %{mmcu=at90s1200|mmcu=attiny1*:-m avr1200} \
2690 %{mmcu=attiny28:-m avr1} \
2691 %{mmcu=at90s2313:-m avr23xx} \
2692 %{mmcu=at90s2323:-m avr23xx} \
2693 %{mmcu=at90s2333:-m avr23xx} \
2694 %{mmcu=at90s2343:-m avr23xx} \
2695 %{mmcu=attiny22:-m avr23xx} \
2696 %{mmcu=attiny26:-m avr23xx} \
2697 %{mmcu=at90s4433:-m avr4433} \
2698 %{mmcu=at90s4414:-m avr44x4} \
2699 %{mmcu=at90s4434:-m avr44x4} \
2700 %{mmcu=at90c8534:-m avr85xx} \
2701 %{mmcu=at90s8535:-m avr85xx} \
2702 %{mmcu=at90s8515:-m avr85xx}"
2704 /* A C string constant that tells the GNU CC driver program options to
2705 pass to the linker. It can also specify how to translate options
2706 you give to GNU CC into options for GNU CC to pass to the linker.
2708 Do not define this macro if it does not need to do anything. */
2711 "%{!mmcu=at90s1*:%{!mmcu=attiny1*:%{!mmcu=attiny28: -lc }}}"
2712 /* Another C string constant used much like `LINK_SPEC'. The
2713 difference between the two is that `LIB_SPEC' is used at the end
2714 of the command given to the linker.
2716 If this macro is not defined, a default is provided that loads the
2717 standard C library from the usual place. See `gcc.c'. */
2719 #define LIBGCC_SPEC \
2720 "%{!mmcu=at90s1*:%{!mmcu=attiny1*:%{!mmcu=attiny28: -lgcc }}}"
2721 /* Another C string constant that tells the GNU CC driver program how
2722 and when to place a reference to `libgcc.a' into the linker
2723 command line. This constant is placed both before and after the
2724 value of `LIB_SPEC'.
2726 If this macro is not defined, the GNU CC driver provides a default
2727 that passes the string `-lgcc' to the linker unless the `-shared'
2728 option is specified. */
2730 #define STARTFILE_SPEC "%(crt_binutils)"
2731 /* Another C string constant used much like `LINK_SPEC'. The
2732 difference between the two is that `STARTFILE_SPEC' is used at the
2733 very beginning of the command given to the linker.
2735 If this macro is not defined, a default is provided that loads the
2736 standard C startup file from the usual place. See `gcc.c'. */
2738 #define ENDFILE_SPEC ""
2739 /* Another C string constant used much like `LINK_SPEC'. The
2740 difference between the two is that `ENDFILE_SPEC' is used at the
2741 very end of the command given to the linker.
2743 Do not define this macro if it does not need to do anything. */
2745 #define CRT_BINUTILS_SPECS "\
2746 %{mmcu=at90s1200|mmcu=avr1:crts1200.o%s} \
2747 %{mmcu=attiny10|mmcu=attiny11:crttn11.o%s} \
2748 %{mmcu=attiny12:crttn12.o%s} \
2749 %{mmcu=attiny15:crttn15.o%s} \
2750 %{mmcu=attiny28:crttn28.o%s} \
2751 %{!mmcu*|mmcu=at90s8515|mmcu=avr2:crts8515.o%s} \
2752 %{mmcu=at90s2313:crts2313.o%s} \
2753 %{mmcu=at90s2323:crts2323.o%s} \
2754 %{mmcu=at90s2333:crts2333.o%s} \
2755 %{mmcu=at90s2343:crts2343.o%s} \
2756 %{mmcu=attiny22:crttn22.o%s} \
2757 %{mmcu=attiny26:crttn26.o%s} \
2758 %{mmcu=at90s4433:crts4433.o%s} \
2759 %{mmcu=at90s4414:crts4414.o%s} \
2760 %{mmcu=at90s4434:crts4434.o%s} \
2761 %{mmcu=at90c8534:crtc8534.o%s} \
2762 %{mmcu=at90s8535:crts8535.o%s} \
2763 %{mmcu=atmega103|mmcu=avr3:crtm103.o%s} \
2764 %{mmcu=atmega603:crtm603.o%s} \
2765 %{mmcu=at43usb320:crt43320.o%s} \
2766 %{mmcu=at43usb355:crt43355.o%s} \
2767 %{mmcu=at76c711:crt76711.o%s } \
2768 %{mmcu=atmega8:crtm8.o%s} \
2769 %{mmcu=atmega83|mmcu=avr4:crtm83.o%s} \
2770 %{mmcu=atmega85:crtm85.o%s} \
2771 %{mmcu=atmega8515:crtm8515.o%s} \
2772 %{mmcu=atmega16:crtm16.o%s} \
2773 %{mmcu=atmega161|mmcu=avr5:crtm161.o%s} \
2774 %{mmcu=atmega162:crtm162.o%s} \
2775 %{mmcu=atmega163:crtm163.o%s} \
2776 %{mmcu=atmega32:crtm32.o%s} \
2777 %{mmcu=atmega323:crtm323.o%s} \
2778 %{mmcu=atmega64:crtm64.o%s} \
2779 %{mmcu=atmega128:crtm128.o%s} \
2780 %{mmcu=at94k:crtat94k.o%s}"
2782 #define CPP_AVR1_SPEC "-D__AVR_ARCH__=1 -D__AVR_ASM_ONLY__ "
2783 #define CPP_AVR2_SPEC "-D__AVR_ARCH__=2 "
2784 #define CPP_AVR3_SPEC "-D__AVR_ARCH__=3 -D__AVR_MEGA__ "
2785 #define CPP_AVR4_SPEC "-D__AVR_ARCH__=4 -D__AVR_ENHANCED__ "
2786 #define CPP_AVR5_SPEC "-D__AVR_ARCH__=5 -D__AVR_ENHANCED__ -D__AVR_MEGA__ "
2788 #define EXTRA_SPECS \
2789 {"cpp_avr1", CPP_AVR1_SPEC}, \
2790 {"cpp_avr2", CPP_AVR2_SPEC}, \
2791 {"cpp_avr3", CPP_AVR3_SPEC}, \
2792 {"cpp_avr4", CPP_AVR4_SPEC}, \
2793 {"cpp_avr5", CPP_AVR5_SPEC}, \
2794 {"crt_binutils", CRT_BINUTILS_SPECS},
2795 /* Define this macro to provide additional specifications to put in
2796 the `specs' file that can be used in various specifications like
2799 The definition should be an initializer for an array of structures,
2800 containing a string constant, that defines the specification name,
2801 and a string constant that provides the specification.
2803 Do not define this macro if it does not need to do anything.
2805 `EXTRA_SPECS' is useful when an architecture contains several
2806 related targets, which have various `..._SPECS' which are similar
2807 to each other, and the maintainer would like one central place to
2808 keep these definitions.
2810 For example, the PowerPC System V.4 targets use `EXTRA_SPECS' to
2811 define either `_CALL_SYSV' when the System V calling sequence is
2812 used or `_CALL_AIX' when the older AIX-based calling sequence is
2815 The `config/rs6000/rs6000.h' target file defines:
2817 #define EXTRA_SPECS \
2818 { "cpp_sysv_default", CPP_SYSV_DEFAULT },
2820 #define CPP_SYS_DEFAULT ""
2822 The `config/rs6000/sysv.h' target file defines:
2825 "%{posix: -D_POSIX_SOURCE } \
2826 %{mcall-sysv: -D_CALL_SYSV } %{mcall-aix: -D_CALL_AIX } \
2827 %{!mcall-sysv: %{!mcall-aix: %(cpp_sysv_default) }} \
2828 %{msoft-float: -D_SOFT_FLOAT} %{mcpu=403: -D_SOFT_FLOAT}"
2830 #undef CPP_SYSV_DEFAULT
2831 #define CPP_SYSV_DEFAULT "-D_CALL_SYSV"
2833 while the `config/rs6000/eabiaix.h' target file defines
2834 `CPP_SYSV_DEFAULT' as:
2836 #undef CPP_SYSV_DEFAULT
2837 #define CPP_SYSV_DEFAULT "-D_CALL_AIX" */
2839 /* This is the default without any -mmcu=* option (AT90S*). */
2840 #define MULTILIB_DEFAULTS { "mmcu=avr2" }
2842 /* This is undefined macro for collect2 disabling */
2843 #define LINKER_NAME "ld"
2845 #define TEST_HARD_REG_CLASS(CLASS, REGNO) \
2846 TEST_HARD_REG_BIT (reg_class_contents[ (int) (CLASS)], REGNO)
2848 /* Note that the other files fail to use these
2849 in some of the places where they should. */
2851 #if defined(__STDC__) || defined(ALMOST_STDC)
2852 #define AS2(a,b,c) #a " " #b "," #c
2853 #define AS2C(b,c) " " #b "," #c
2854 #define AS3(a,b,c,d) #a " " #b "," #c "," #d
2855 #define AS1(a,b) #a " " #b
2857 #define AS1(a,b) "a b"
2858 #define AS2(a,b,c) "a b,c"
2859 #define AS2C(b,c) " b,c"
2860 #define AS3(a,b,c,d) "a b,c,d"
2862 #define OUT_AS1(a,b) output_asm_insn (AS1(a,b), operands)
2863 #define OUT_AS2(a,b,c) output_asm_insn (AS2(a,b,c), operands)
2864 #define CR_TAB "\n\t"
2866 /* Define this macro as a C statement that declares additional library
2867 routines renames existing ones. `init_optabs' calls this macro
2868 after initializing all the normal library routines. */
2870 #define INIT_TARGET_OPTABS \
2875 /* Temporary register r0 */
2878 /* zero register r1 */
2879 #define ZERO_REGNO 1
2881 /* Temporary register which used for load immediate values to r0-r15 */
2882 #define LDI_REG_REGNO 31
2884 extern struct rtx_def *tmp_reg_rtx;
2885 extern struct rtx_def *zero_reg_rtx;
2886 extern struct rtx_def *ldi_reg_rtx;
2888 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
2890 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
2892 /* Get the standard ELF stabs definitions. */
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