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, 2003, 2004
4 Free Software Foundation, Inc.
5 Contributed by Denis Chertykov (denisc@overta.ru)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING. If not, write to
21 the Free Software Foundation, 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
24 /* Names to predefine in the preprocessor for this target machine. */
26 #define TARGET_CPU_CPP_BUILTINS() \
29 builtin_define_std ("AVR"); \
30 if (avr_base_arch_macro) \
31 builtin_define (avr_base_arch_macro); \
32 if (avr_extra_arch_macro) \
33 builtin_define (avr_extra_arch_macro); \
35 builtin_define ("__AVR_ASM_ONLY__"); \
37 builtin_define ("__AVR_ENHANCED__"); \
39 builtin_define ("__AVR_MEGA__"); \
40 if (TARGET_NO_INTERRUPTS) \
41 builtin_define ("__NO_INTERRUPTS__"); \
45 /* This declaration should be present. */
46 extern int target_flags;
48 #define MASK_ALL_DEBUG 0x00000FE0
49 #define MASK_ORDER_1 0x00001000
50 #define MASK_INSN_SIZE_DUMP 0x00002000
51 #define MASK_ORDER_2 0x00004000
52 #define MASK_NO_TABLEJUMP 0x00008000
53 #define MASK_INT8 0x00010000
54 #define MASK_NO_INTERRUPTS 0x00020000
55 #define MASK_CALL_PROLOGUES 0x00040000
56 #define MASK_TINY_STACK 0x00080000
57 #define MASK_SHORT_CALLS 0x00100000
59 #define TARGET_ORDER_1 (target_flags & MASK_ORDER_1)
60 #define TARGET_ORDER_2 (target_flags & MASK_ORDER_2)
61 #define TARGET_INT8 (target_flags & MASK_INT8)
62 #define TARGET_NO_INTERRUPTS (target_flags & MASK_NO_INTERRUPTS)
63 #define TARGET_INSN_SIZE_DUMP (target_flags & MASK_INSN_SIZE_DUMP)
64 #define TARGET_CALL_PROLOGUES (target_flags & MASK_CALL_PROLOGUES)
65 #define TARGET_TINY_STACK (target_flags & MASK_TINY_STACK)
66 #define TARGET_NO_TABLEJUMP (target_flags & MASK_NO_TABLEJUMP)
67 #define TARGET_SHORT_CALLS (target_flags & MASK_SHORT_CALLS)
68 #define TARGET_ALL_DEBUG (target_flags & MASK_ALL_DEBUG)
70 #define TARGET_SWITCHES { \
71 { "order1", MASK_ORDER_1, NULL }, \
72 { "order2", MASK_ORDER_2, NULL }, \
73 { "int8", MASK_INT8, N_("Assume int to be 8 bit integer") }, \
74 { "no-interrupts", MASK_NO_INTERRUPTS, \
75 N_("Change the stack pointer without disabling interrupts") }, \
76 { "call-prologues", MASK_CALL_PROLOGUES, \
77 N_("Use subroutines for function prologue/epilogue") }, \
78 { "tiny-stack", MASK_TINY_STACK, \
79 N_("Change only the low 8 bits of the stack pointer") }, \
80 { "no-tablejump", MASK_NO_TABLEJUMP, \
81 N_("Do not generate tablejump insns") }, \
82 { "short-calls", MASK_SHORT_CALLS, \
83 N_("Use rjmp/rcall (limited range) on >8K devices") }, \
84 { "size", MASK_INSN_SIZE_DUMP, \
85 N_("Output instruction sizes to the asm file") }, \
86 { "deb", MASK_ALL_DEBUG, NULL }, \
89 extern const char *avr_init_stack;
90 extern const char *avr_mcu_name;
92 extern const char *avr_base_arch_macro;
93 extern const char *avr_extra_arch_macro;
94 extern int avr_mega_p;
95 extern int avr_enhanced_p;
96 extern int avr_asm_only_p;
98 #define AVR_MEGA (avr_mega_p && !TARGET_SHORT_CALLS)
99 #define AVR_ENHANCED (avr_enhanced_p)
101 #define TARGET_OPTIONS { \
102 { "init-stack=", &avr_init_stack, N_("Specify the initial stack address"), 0}, \
103 { "mcu=", &avr_mcu_name, N_("Specify the MCU name"), 0} }
105 #define TARGET_VERSION fprintf (stderr, " (GNU assembler syntax)");
106 /* This macro is a C statement to print on `stderr' a string
107 describing the particular machine description choice. Every
108 machine description should define `TARGET_VERSION'. For example:
111 #define TARGET_VERSION \
112 fprintf (stderr, " (68k, Motorola syntax)");
114 #define TARGET_VERSION \
115 fprintf (stderr, " (68k, MIT syntax)");
118 #define OVERRIDE_OPTIONS avr_override_options ()
119 /* `OVERRIDE_OPTIONS'
120 Sometimes certain combinations of command options do not make
121 sense on a particular target machine. You can define a macro
122 `OVERRIDE_OPTIONS' to take account of this. This macro, if
123 defined, is executed once just after all the command options have
126 Don't use this macro to turn on various extra optimizations for
127 `-O'. That is what `OPTIMIZATION_OPTIONS' is for. */
129 #define CAN_DEBUG_WITHOUT_FP
130 /* Define this macro if debugging can be performed even without a
131 frame pointer. If this macro is defined, GCC will turn on the
132 `-fomit-frame-pointer' option whenever `-O' is specified. */
134 /* Define this if most significant byte of a word is the lowest numbered. */
135 #define BITS_BIG_ENDIAN 0
137 /* Define this if most significant byte of a word is the lowest numbered. */
138 #define BYTES_BIG_ENDIAN 0
140 /* Define this if most significant word of a multiword number is the lowest
142 #define WORDS_BIG_ENDIAN 0
145 /* This is to get correct SI and DI modes in libgcc2.c (32 and 64 bits). */
146 #define UNITS_PER_WORD 4
148 /* Width of a word, in units (bytes). */
149 #define UNITS_PER_WORD 1
152 /* Width in bits of a pointer.
153 See also the macro `Pmode' defined below. */
154 #define POINTER_SIZE 16
157 /* Maximum sized of reasonable data type
158 DImode or Dfmode ... */
159 #define MAX_FIXED_MODE_SIZE 32
161 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
162 #define PARM_BOUNDARY 8
164 /* Allocation boundary (in *bits*) for the code of a function. */
165 #define FUNCTION_BOUNDARY 8
167 /* Alignment of field after `int : 0' in a structure. */
168 #define EMPTY_FIELD_BOUNDARY 8
170 /* No data type wants to be aligned rounder than this. */
171 #define BIGGEST_ALIGNMENT 8
174 /* Define this if move instructions will actually fail to work
175 when given unaligned data. */
176 #define STRICT_ALIGNMENT 0
178 /* A C expression for the size in bits of the type `int' on the
179 target machine. If you don't define this, the default is one word. */
180 #define INT_TYPE_SIZE (TARGET_INT8 ? 8 : 16)
183 /* A C expression for the size in bits of the type `short' on the
184 target machine. If you don't define this, the default is half a
185 word. (If this would be less than one storage unit, it is rounded
187 #define SHORT_TYPE_SIZE (INT_TYPE_SIZE == 8 ? INT_TYPE_SIZE : 16)
189 /* A C expression for the size in bits of the type `long' on the
190 target machine. If you don't define this, the default is one word. */
191 #define LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 16 : 32)
193 #define MAX_LONG_TYPE_SIZE 32
194 /* Maximum number for the size in bits of the type `long' on the
195 target machine. If this is undefined, the default is
196 `LONG_TYPE_SIZE'. Otherwise, it is the constant value that is the
197 largest value that `LONG_TYPE_SIZE' can have at run-time. This is
201 #define LONG_LONG_TYPE_SIZE 64
202 /* A C expression for the size in bits of the type `long long' on the
203 target machine. If you don't define this, the default is two
204 words. If you want to support GNU Ada on your machine, the value
205 of macro must be at least 64. */
208 #define FLOAT_TYPE_SIZE 32
209 /* A C expression for the size in bits of the type `float' on the
210 target machine. If you don't define this, the default is one word. */
212 #define DOUBLE_TYPE_SIZE 32
213 /* A C expression for the size in bits of the type `double' on the
214 target machine. If you don't define this, the default is two
218 #define LONG_DOUBLE_TYPE_SIZE 32
219 /* A C expression for the size in bits of the type `long double' on
220 the target machine. If you don't define this, the default is two
223 #define DEFAULT_SIGNED_CHAR 1
224 /* An expression whose value is 1 or 0, according to whether the type
225 `char' should be signed or unsigned by default. The user can
226 always override this default with the options `-fsigned-char' and
227 `-funsigned-char'. */
229 /* `DEFAULT_SHORT_ENUMS'
230 A C expression to determine whether to give an `enum' type only as
231 many bytes as it takes to represent the range of possible values
232 of that type. A nonzero value means to do that; a zero value
233 means all `enum' types should be allocated like `int'.
235 If you don't define the macro, the default is 0. */
237 #define SIZE_TYPE (INT_TYPE_SIZE == 8 ? "long unsigned int" : "unsigned int")
238 /* A C expression for a string describing the name of the data type
239 to use for size values. The typedef name `size_t' is defined
240 using the contents of the string.
242 The string can contain more than one keyword. If so, separate
243 them with spaces, and write first any length keyword, then
244 `unsigned' if appropriate, and finally `int'. The string must
245 exactly match one of the data type names defined in the function
246 `init_decl_processing' in the file `c-decl.c'. You may not omit
247 `int' or change the order--that would cause the compiler to crash
250 If you don't define this macro, the default is `"long unsigned
253 #define PTRDIFF_TYPE (INT_TYPE_SIZE == 8 ? "long int" :"int")
254 /* A C expression for a string describing the name of the data type
255 to use for the result of subtracting two pointers. The typedef
256 name `ptrdiff_t' is defined using the contents of the string. See
257 `SIZE_TYPE' above for more information.
259 If you don't define this macro, the default is `"long int"'. */
262 #define WCHAR_TYPE_SIZE 16
263 /* A C expression for the size in bits of the data type for wide
264 characters. This is used in `cpp', which cannot make use of
267 #define FIRST_PSEUDO_REGISTER 36
268 /* Number of hardware registers known to the compiler. They receive
269 numbers 0 through `FIRST_PSEUDO_REGISTER-1'; thus, the first
270 pseudo register's number really is assigned the number
271 `FIRST_PSEUDO_REGISTER'. */
273 #define FIXED_REGISTERS {\
291 1,1 /* arg pointer */ }
292 /* An initializer that says which registers are used for fixed
293 purposes all throughout the compiled code and are therefore not
294 available for general allocation. These would include the stack
295 pointer, the frame pointer (except on machines where that can be
296 used as a general register when no frame pointer is needed), the
297 program counter on machines where that is considered one of the
298 addressable registers, and any other numbered register with a
301 This information is expressed as a sequence of numbers, separated
302 by commas and surrounded by braces. The Nth number is 1 if
303 register N is fixed, 0 otherwise.
305 The table initialized from this macro, and the table initialized by
306 the following one, may be overridden at run time either
307 automatically, by the actions of the macro
308 `CONDITIONAL_REGISTER_USAGE', or by the user with the command
309 options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'. */
311 #define CALL_USED_REGISTERS { \
329 1,1 /* arg pointer */ }
330 /* Like `FIXED_REGISTERS' but has 1 for each register that is
331 clobbered (in general) by function calls as well as for fixed
332 registers. This macro therefore identifies the registers that are
333 not available for general allocation of values that must live
334 across function calls.
336 If a register has 0 in `CALL_USED_REGISTERS', the compiler
337 automatically saves it on function entry and restores it on
338 function exit, if the register is used within the function. */
340 #define NON_SAVING_SETJMP 0
341 /* If this macro is defined and has a nonzero value, it means that
342 `setjmp' and related functions fail to save the registers, or that
343 `longjmp' fails to restore them. To compensate, the compiler
344 avoids putting variables in registers in functions that use
347 #define REG_ALLOC_ORDER { \
355 17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2, \
359 /* If defined, an initializer for a vector of integers, containing the
360 numbers of hard registers in the order in which GCC should
361 prefer to use them (from most preferred to least).
363 If this macro is not defined, registers are used lowest numbered
364 first (all else being equal).
366 One use of this macro is on machines where the highest numbered
367 registers must always be saved and the save-multiple-registers
368 instruction supports only sequences of consecutive registers. On
369 such machines, define `REG_ALLOC_ORDER' to be an initializer that
370 lists the highest numbered allocatable register first. */
372 #define ORDER_REGS_FOR_LOCAL_ALLOC order_regs_for_local_alloc ()
373 /* ORDER_REGS_FOR_LOCAL_ALLOC'
374 A C statement (sans semicolon) to choose the order in which to
375 allocate hard registers for pseudo-registers local to a basic
378 Store the desired register order in the array `reg_alloc_order'.
379 Element 0 should be the register to allocate first; element 1, the
380 next register; and so on.
382 The macro body should not assume anything about the contents of
383 `reg_alloc_order' before execution of the macro.
385 On most machines, it is not necessary to define this macro. */
388 #define HARD_REGNO_NREGS(REGNO, MODE) ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
390 /* A C expression for the number of consecutive hard registers,
391 starting at register number REGNO, required to hold a value of mode
394 On a machine where all registers are exactly one word, a suitable
395 definition of this macro is
397 #define HARD_REGNO_NREGS(REGNO, MODE) \
398 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
399 / UNITS_PER_WORD)) */
401 #define HARD_REGNO_MODE_OK(REGNO, MODE) avr_hard_regno_mode_ok(REGNO, MODE)
402 /* A C expression that is nonzero if it is permissible to store a
403 value of mode MODE in hard register number REGNO (or in several
404 registers starting with that one). For a machine where all
405 registers are equivalent, a suitable definition is
407 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
409 It is not necessary for this macro to check for the numbers of
410 fixed registers, because the allocation mechanism considers them
411 to be always occupied.
413 On some machines, double-precision values must be kept in even/odd
414 register pairs. The way to implement that is to define this macro
415 to reject odd register numbers for such modes.
417 The minimum requirement for a mode to be OK in a register is that
418 the `movMODE' instruction pattern support moves between the
419 register and any other hard register for which the mode is OK; and
420 that moving a value into the register and back out not alter it.
422 Since the same instruction used to move `SImode' will work for all
423 narrower integer modes, it is not necessary on any machine for
424 `HARD_REGNO_MODE_OK' to distinguish between these modes, provided
425 you define patterns `movhi', etc., to take advantage of this. This
426 is useful because of the interaction between `HARD_REGNO_MODE_OK'
427 and `MODES_TIEABLE_P'; it is very desirable for all integer modes
430 Many machines have special registers for floating point arithmetic.
431 Often people assume that floating point machine modes are allowed
432 only in floating point registers. This is not true. Any
433 registers that can hold integers can safely *hold* a floating
434 point machine mode, whether or not floating arithmetic can be done
435 on it in those registers. Integer move instructions can be used
438 On some machines, though, the converse is true: fixed-point machine
439 modes may not go in floating registers. This is true if the
440 floating registers normalize any value stored in them, because
441 storing a non-floating value there would garble it. In this case,
442 `HARD_REGNO_MODE_OK' should reject fixed-point machine modes in
443 floating registers. But if the floating registers do not
444 automatically normalize, if you can store any bit pattern in one
445 and retrieve it unchanged without a trap, then any machine mode
446 may go in a floating register, so you can define this macro to say
449 The primary significance of special floating registers is rather
450 that they are the registers acceptable in floating point arithmetic
451 instructions. However, this is of no concern to
452 `HARD_REGNO_MODE_OK'. You handle it by writing the proper
453 constraints for those instructions.
455 On some machines, the floating registers are especially slow to
456 access, so that it is better to store a value in a stack frame
457 than in such a register if floating point arithmetic is not being
458 done. As long as the floating registers are not in class
459 `GENERAL_REGS', they will not be used unless some pattern's
460 constraint asks for one. */
462 #define MODES_TIEABLE_P(MODE1, MODE2) 0
463 /* A C expression that is nonzero if it is desirable to choose
464 register allocation so as to avoid move instructions between a
465 value of mode MODE1 and a value of mode MODE2.
467 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R,
468 MODE2)' are ever different for any R, then `MODES_TIEABLE_P (MODE1,
469 MODE2)' must be zero. */
474 POINTER_X_REGS, /* r26 - r27 */
475 POINTER_Y_REGS, /* r28 - r29 */
476 POINTER_Z_REGS, /* r30 - r31 */
477 STACK_REG, /* STACK */
478 BASE_POINTER_REGS, /* r28 - r31 */
479 POINTER_REGS, /* r26 - r31 */
480 ADDW_REGS, /* r24 - r31 */
481 SIMPLE_LD_REGS, /* r16 - r23 */
482 LD_REGS, /* r16 - r31 */
483 NO_LD_REGS, /* r0 - r15 */
484 GENERAL_REGS, /* r0 - r31 */
485 ALL_REGS, LIM_REG_CLASSES
487 /* An enumeral type that must be defined with all the register class
488 names as enumeral values. `NO_REGS' must be first. `ALL_REGS'
489 must be the last register class, followed by one more enumeral
490 value, `LIM_REG_CLASSES', which is not a register class but rather
491 tells how many classes there are.
493 Each register class has a number, which is the value of casting
494 the class name to type `int'. The number serves as an index in
495 many of the tables described below. */
498 #define N_REG_CLASSES (int)LIM_REG_CLASSES
499 /* The number of distinct register classes, defined as follows:
501 #define N_REG_CLASSES (int) LIM_REG_CLASSES */
503 #define REG_CLASS_NAMES { \
506 "POINTER_X_REGS", /* r26 - r27 */ \
507 "POINTER_Y_REGS", /* r28 - r29 */ \
508 "POINTER_Z_REGS", /* r30 - r31 */ \
509 "STACK_REG", /* STACK */ \
510 "BASE_POINTER_REGS", /* r28 - r31 */ \
511 "POINTER_REGS", /* r26 - r31 */ \
512 "ADDW_REGS", /* r24 - r31 */ \
513 "SIMPLE_LD_REGS", /* r16 - r23 */ \
514 "LD_REGS", /* r16 - r31 */ \
515 "NO_LD_REGS", /* r0 - r15 */ \
516 "GENERAL_REGS", /* r0 - r31 */ \
518 /* An initializer containing the names of the register classes as C
519 string constants. These names are used in writing some of the
527 #define REG_CLASS_CONTENTS { \
528 {0x00000000,0x00000000}, /* NO_REGS */ \
529 {0x00000001,0x00000000}, /* R0_REG */ \
530 {3 << REG_X,0x00000000}, /* POINTER_X_REGS, r26 - r27 */ \
531 {3 << REG_Y,0x00000000}, /* POINTER_Y_REGS, r28 - r29 */ \
532 {3 << REG_Z,0x00000000}, /* POINTER_Z_REGS, r30 - r31 */ \
533 {0x00000000,0x00000003}, /* STACK_REG, STACK */ \
534 {(3 << REG_Y) | (3 << REG_Z), \
535 0x00000000}, /* BASE_POINTER_REGS, r28 - r31 */ \
536 {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z), \
537 0x00000000}, /* POINTER_REGS, r26 - r31 */ \
538 {(3 << REG_X) | (3 << REG_Y) | (3 << REG_Z) | (3 << REG_W), \
539 0x00000000}, /* ADDW_REGS, r24 - r31 */ \
540 {0x00ff0000,0x00000000}, /* SIMPLE_LD_REGS r16 - r23 */ \
541 {(3 << REG_X)|(3 << REG_Y)|(3 << REG_Z)|(3 << REG_W)|(0xff << 16), \
542 0x00000000}, /* LD_REGS, r16 - r31 */ \
543 {0x0000ffff,0x00000000}, /* NO_LD_REGS r0 - r15 */ \
544 {0xffffffff,0x00000000}, /* GENERAL_REGS, r0 - r31 */ \
545 {0xffffffff,0x00000003} /* ALL_REGS */ \
547 /* An initializer containing the contents of the register classes, as
548 integers which are bit masks. The Nth integer specifies the
549 contents of class N. The way the integer MASK is interpreted is
550 that register R is in the class if `MASK & (1 << R)' is 1.
552 When the machine has more than 32 registers, an integer does not
553 suffice. Then the integers are replaced by sub-initializers,
554 braced groupings containing several integers. Each
555 sub-initializer must be suitable as an initializer for the type
556 `HARD_REG_SET' which is defined in `hard-reg-set.h'. */
558 #define REGNO_REG_CLASS(R) avr_regno_reg_class(R)
559 /* A C expression whose value is a register class containing hard
560 register REGNO. In general there is more than one such class;
561 choose a class which is "minimal", meaning that no smaller class
562 also contains the register. */
564 #define BASE_REG_CLASS (reload_completed ? BASE_POINTER_REGS : POINTER_REGS)
565 /* A macro whose definition is the name of the class to which a valid
566 base register must belong. A base register is one used in an
567 address which is the register value plus a displacement. */
569 #define INDEX_REG_CLASS NO_REGS
570 /* A macro whose definition is the name of the class to which a valid
571 index register must belong. An index register is one used in an
572 address where its value is either multiplied by a scale factor or
573 added to another register (as well as added to a displacement). */
575 #define REG_CLASS_FROM_LETTER(C) avr_reg_class_from_letter(C)
576 /* A C expression which defines the machine-dependent operand
577 constraint letters for register classes. If CHAR is such a
578 letter, the value should be the register class corresponding to
579 it. Otherwise, the value should be `NO_REGS'. The register
580 letter `r', corresponding to class `GENERAL_REGS', will not be
581 passed to this macro; you do not need to handle it. */
583 #define REGNO_OK_FOR_BASE_P(r) (((r) < FIRST_PSEUDO_REGISTER \
587 || (r) == ARG_POINTER_REGNUM)) \
589 && (reg_renumber[r] == REG_X \
590 || reg_renumber[r] == REG_Y \
591 || reg_renumber[r] == REG_Z \
592 || (reg_renumber[r] \
593 == ARG_POINTER_REGNUM))))
594 /* A C expression which is nonzero if register number NUM is suitable
595 for use as a base register in operand addresses. It may be either
596 a suitable hard register or a pseudo register that has been
597 allocated such a hard register. */
599 /* #define REGNO_MODE_OK_FOR_BASE_P(r, m) regno_mode_ok_for_base_p(r, m)
600 A C expression that is just like `REGNO_OK_FOR_BASE_P', except that
601 that expression may examine the mode of the memory reference in
602 MODE. You should define this macro if the mode of the memory
603 reference affects whether a register may be used as a base
604 register. If you define this macro, the compiler will use it
605 instead of `REGNO_OK_FOR_BASE_P'. */
607 #define REGNO_OK_FOR_INDEX_P(NUM) 0
608 /* A C expression which is nonzero if register number NUM is suitable
609 for use as an index register in operand addresses. It may be
610 either a suitable hard register or a pseudo register that has been
611 allocated such a hard register.
613 The difference between an index register and a base register is
614 that the index register may be scaled. If an address involves the
615 sum of two registers, neither one of them scaled, then either one
616 may be labeled the "base" and the other the "index"; but whichever
617 labeling is used must fit the machine's constraints of which
618 registers may serve in each capacity. The compiler will try both
619 labelings, looking for one that is valid, and will reload one or
620 both registers only if neither labeling works. */
622 #define PREFERRED_RELOAD_CLASS(X, CLASS) preferred_reload_class(X,CLASS)
623 /* A C expression that places additional restrictions on the register
624 class to use when it is necessary to copy value X into a register
625 in class CLASS. The value is a register class; perhaps CLASS, or
626 perhaps another, smaller class. On many machines, the following
629 #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS
631 Sometimes returning a more restrictive class makes better code.
632 For example, on the 68000, when X is an integer constant that is
633 in range for a `moveq' instruction, the value of this macro is
634 always `DATA_REGS' as long as CLASS includes the data registers.
635 Requiring a data register guarantees that a `moveq' will be used.
637 If X is a `const_double', by returning `NO_REGS' you can force X
638 into a memory constant. This is useful on certain machines where
639 immediate floating values cannot be loaded into certain kinds of
641 /* `PREFERRED_OUTPUT_RELOAD_CLASS (X, CLASS)'
642 Like `PREFERRED_RELOAD_CLASS', but for output reloads instead of
643 input reloads. If you don't define this macro, the default is to
644 use CLASS, unchanged. */
646 /* `LIMIT_RELOAD_CLASS (MODE, CLASS)'
647 A C expression that places additional restrictions on the register
648 class to use when it is necessary to be able to hold a value of
649 mode MODE in a reload register for which class CLASS would
652 Unlike `PREFERRED_RELOAD_CLASS', this macro should be used when
653 there are certain modes that simply can't go in certain reload
656 The value is a register class; perhaps CLASS, or perhaps another,
659 Don't define this macro unless the target machine has limitations
660 which require the macro to do something nontrivial. */
662 /* SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X)
663 `SECONDARY_RELOAD_CLASS (CLASS, MODE, X)'
664 `SECONDARY_OUTPUT_RELOAD_CLASS (CLASS, MODE, X)'
665 Many machines have some registers that cannot be copied directly
666 to or from memory or even from other types of registers. An
667 example is the `MQ' register, which on most machines, can only be
668 copied to or from general registers, but not memory. Some
669 machines allow copying all registers to and from memory, but
670 require a scratch register for stores to some memory locations
671 (e.g., those with symbolic address on the RT, and those with
672 certain symbolic address on the SPARC when compiling PIC). In
673 some cases, both an intermediate and a scratch register are
676 You should define these macros to indicate to the reload phase
677 that it may need to allocate at least one register for a reload in
678 addition to the register to contain the data. Specifically, if
679 copying X to a register CLASS in MODE requires an intermediate
680 register, you should define `SECONDARY_INPUT_RELOAD_CLASS' to
681 return the largest register class all of whose registers can be
682 used as intermediate registers or scratch registers.
684 If copying a register CLASS in MODE to X requires an intermediate
685 or scratch register, `SECONDARY_OUTPUT_RELOAD_CLASS' should be
686 defined to return the largest register class required. If the
687 requirements for input and output reloads are the same, the macro
688 `SECONDARY_RELOAD_CLASS' should be used instead of defining both
691 The values returned by these macros are often `GENERAL_REGS'.
692 Return `NO_REGS' if no spare register is needed; i.e., if X can be
693 directly copied to or from a register of CLASS in MODE without
694 requiring a scratch register. Do not define this macro if it
695 would always return `NO_REGS'.
697 If a scratch register is required (either with or without an
698 intermediate register), you should define patterns for
699 `reload_inM' or `reload_outM', as required (*note Standard
700 Names::.. These patterns, which will normally be implemented with
701 a `define_expand', should be similar to the `movM' patterns,
702 except that operand 2 is the scratch register.
704 Define constraints for the reload register and scratch register
705 that contain a single register class. If the original reload
706 register (whose class is CLASS) can meet the constraint given in
707 the pattern, the value returned by these macros is used for the
708 class of the scratch register. Otherwise, two additional reload
709 registers are required. Their classes are obtained from the
710 constraints in the insn pattern.
712 X might be a pseudo-register or a `subreg' of a pseudo-register,
713 which could either be in a hard register or in memory. Use
714 `true_regnum' to find out; it will return -1 if the pseudo is in
715 memory and the hard register number if it is in a register.
717 These macros should not be used in the case where a particular
718 class of registers can only be copied to memory and not to another
719 class of registers. In that case, secondary reload registers are
720 not needed and would not be helpful. Instead, a stack location
721 must be used to perform the copy and the `movM' pattern should use
722 memory as an intermediate storage. This case often occurs between
723 floating-point and general registers. */
725 /* `SECONDARY_MEMORY_NEEDED (CLASS1, CLASS2, M)'
726 Certain machines have the property that some registers cannot be
727 copied to some other registers without using memory. Define this
728 macro on those machines to be a C expression that is nonzero if
729 objects of mode M in registers of CLASS1 can only be copied to
730 registers of class CLASS2 by storing a register of CLASS1 into
731 memory and loading that memory location into a register of CLASS2.
733 Do not define this macro if its value would always be zero.
735 `SECONDARY_MEMORY_NEEDED_RTX (MODE)'
736 Normally when `SECONDARY_MEMORY_NEEDED' is defined, the compiler
737 allocates a stack slot for a memory location needed for register
738 copies. If this macro is defined, the compiler instead uses the
739 memory location defined by this macro.
741 Do not define this macro if you do not define
742 `SECONDARY_MEMORY_NEEDED'. */
744 #define SMALL_REGISTER_CLASSES 1
745 /* Normally the compiler avoids choosing registers that have been
746 explicitly mentioned in the rtl as spill registers (these
747 registers are normally those used to pass parameters and return
748 values). However, some machines have so few registers of certain
749 classes that there would not be enough registers to use as spill
750 registers if this were done.
752 Define `SMALL_REGISTER_CLASSES' to be an expression with a nonzero
753 value on these machines. When this macro has a nonzero value, the
754 compiler allows registers explicitly used in the rtl to be used as
755 spill registers but avoids extending the lifetime of these
758 It is always safe to define this macro with a nonzero value, but
759 if you unnecessarily define it, you will reduce the amount of
760 optimizations that can be performed in some cases. If you do not
761 define this macro with a nonzero value when it is required, the
762 compiler will run out of spill registers and print a fatal error
763 message. For most machines, you should not define this macro at
766 #define CLASS_LIKELY_SPILLED_P(c) class_likely_spilled_p(c)
767 /* A C expression whose value is nonzero if pseudos that have been
768 assigned to registers of class CLASS would likely be spilled
769 because registers of CLASS are needed for spill registers.
771 The default value of this macro returns 1 if CLASS has exactly one
772 register and zero otherwise. On most machines, this default
773 should be used. Only define this macro to some other expression
774 if pseudo allocated by `local-alloc.c' end up in memory because
775 their hard registers were needed for spill registers. If this
776 macro returns nonzero for those classes, those pseudos will only
777 be allocated by `global.c', which knows how to reallocate the
778 pseudo to another register. If there would not be another
779 register available for reallocation, you should not change the
780 definition of this macro since the only effect of such a
781 definition would be to slow down register allocation. */
783 #define CLASS_MAX_NREGS(CLASS, MODE) class_max_nregs (CLASS, MODE)
784 /* A C expression for the maximum number of consecutive registers of
785 class CLASS needed to hold a value of mode MODE.
787 This is closely related to the macro `HARD_REGNO_NREGS'. In fact,
788 the value of the macro `CLASS_MAX_NREGS (CLASS, MODE)' should be
789 the maximum value of `HARD_REGNO_NREGS (REGNO, MODE)' for all
790 REGNO values in the class CLASS.
792 This macro helps control the handling of multiple-word values in
795 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
796 ((C) == 'I' ? (VALUE) >= 0 && (VALUE) <= 63 : \
797 (C) == 'J' ? (VALUE) <= 0 && (VALUE) >= -63: \
798 (C) == 'K' ? (VALUE) == 2 : \
799 (C) == 'L' ? (VALUE) == 0 : \
800 (C) == 'M' ? (VALUE) >= 0 && (VALUE) <= 0xff : \
801 (C) == 'N' ? (VALUE) == -1: \
802 (C) == 'O' ? (VALUE) == 8 || (VALUE) == 16 || (VALUE) == 24: \
803 (C) == 'P' ? (VALUE) == 1 : \
806 /* A C expression that defines the machine-dependent operand
807 constraint letters (`I', `J', `K', ... `P') that specify
808 particular ranges of integer values. If C is one of those
809 letters, the expression should check that VALUE, an integer, is in
810 the appropriate range and return 1 if so, 0 otherwise. If C is
811 not one of those letters, the value should be 0 regardless of
814 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
815 ((C) == 'G' ? (VALUE) == CONST0_RTX (SFmode) \
817 /* `CONST_DOUBLE_OK_FOR_LETTER_P (VALUE, C)'
818 A C expression that defines the machine-dependent operand
819 constraint letters that specify particular ranges of
820 `const_double' values (`G' or `H').
822 If C is one of those letters, the expression should check that
823 VALUE, an RTX of code `const_double', is in the appropriate range
824 and return 1 if so, 0 otherwise. If C is not one of those
825 letters, the value should be 0 regardless of VALUE.
827 `const_double' is used for all floating-point constants and for
828 `DImode' fixed-point constants. A given letter can accept either
829 or both kinds of values. It can use `GET_MODE' to distinguish
830 between these kinds. */
832 #define EXTRA_CONSTRAINT(x, c) extra_constraint(x, c)
833 /* A C expression that defines the optional machine-dependent
834 constraint letters (``Q', `R', `S', `T', `U') that can'
835 be used to segregate specific types of operands, usually memory
836 references, for the target machine. Normally this macro will not
837 be defined. If it is required for a particular target machine, it
838 should return 1 if VALUE corresponds to the operand type
839 represented by the constraint letter C. If C is not defined as an
840 extra constraint, the value returned should be 0 regardless of
843 For example, on the ROMP, load instructions cannot have their
844 output in r0 if the memory reference contains a symbolic address.
845 Constraint letter `Q' is defined as representing a memory address
846 that does *not* contain a symbolic address. An alternative is
847 specified with a `Q' constraint on the input and `r' on the
848 output. The next alternative specifies `m' on the input and a
849 register class that does not include r0 on the output. */
851 /* This is an undocumented variable which describes
852 how GCC will push a data */
853 #define STACK_PUSH_CODE POST_DEC
855 #define STACK_GROWS_DOWNWARD
856 /* Define this macro if pushing a word onto the stack moves the stack
857 pointer to a smaller address.
859 When we say, "define this macro if ...," it means that the
860 compiler checks this macro only with `#ifdef' so the precise
861 definition used does not matter. */
863 #define STARTING_FRAME_OFFSET 1
864 /* Offset from the frame pointer to the first local variable slot to
867 If `FRAME_GROWS_DOWNWARD', find the next slot's offset by
868 subtracting the first slot's length from `STARTING_FRAME_OFFSET'.
869 Otherwise, it is found by adding the length of the first slot to
870 the value `STARTING_FRAME_OFFSET'. */
872 #define STACK_POINTER_OFFSET 1
873 /* Offset from the stack pointer register to the first location at
874 which outgoing arguments are placed. If not specified, the
875 default value of zero is used. This is the proper value for most
878 If `ARGS_GROW_DOWNWARD', this is the offset to the location above
879 the first location at which outgoing arguments are placed. */
881 #define FIRST_PARM_OFFSET(FUNDECL) 0
882 /* Offset from the argument pointer register to the first argument's
883 address. On some machines it may depend on the data type of the
886 If `ARGS_GROW_DOWNWARD', this is the offset to the location above
887 the first argument's address. */
889 /* `STACK_DYNAMIC_OFFSET (FUNDECL)'
890 Offset from the stack pointer register to an item dynamically
891 allocated on the stack, e.g., by `alloca'.
893 The default value for this macro is `STACK_POINTER_OFFSET' plus the
894 length of the outgoing arguments. The default is correct for most
895 machines. See `function.c' for details. */
897 #define STACK_BOUNDARY 8
898 /* Define this macro if there is a guaranteed alignment for the stack
899 pointer on this machine. The definition is a C expression for the
900 desired alignment (measured in bits). This value is used as a
901 default if PREFERRED_STACK_BOUNDARY is not defined. */
903 #define STACK_POINTER_REGNUM 32
904 /* The register number of the stack pointer register, which must also
905 be a fixed register according to `FIXED_REGISTERS'. On most
906 machines, the hardware determines which register this is. */
908 #define FRAME_POINTER_REGNUM REG_Y
909 /* The register number of the frame pointer register, which is used to
910 access automatic variables in the stack frame. On some machines,
911 the hardware determines which register this is. On other
912 machines, you can choose any register you wish for this purpose. */
914 #define ARG_POINTER_REGNUM 34
915 /* The register number of the arg pointer register, which is used to
916 access the function's argument list. On some machines, this is
917 the same as the frame pointer register. On some machines, the
918 hardware determines which register this is. On other machines,
919 you can choose any register you wish for this purpose. If this is
920 not the same register as the frame pointer register, then you must
921 mark it as a fixed register according to `FIXED_REGISTERS', or
922 arrange to be able to eliminate it (*note Elimination::.). */
924 #define STATIC_CHAIN_REGNUM 2
925 /* Register numbers used for passing a function's static chain
926 pointer. If register windows are used, the register number as
927 seen by the called function is `STATIC_CHAIN_INCOMING_REGNUM',
928 while the register number as seen by the calling function is
929 `STATIC_CHAIN_REGNUM'. If these registers are the same,
930 `STATIC_CHAIN_INCOMING_REGNUM' need not be defined.
932 The static chain register need not be a fixed register.
934 If the static chain is passed in memory, these macros should not be
935 defined; instead, the next two macros should be defined. */
937 #define FRAME_POINTER_REQUIRED frame_pointer_required_p()
938 /* A C expression which is nonzero if a function must have and use a
939 frame pointer. This expression is evaluated in the reload pass.
940 If its value is nonzero the function will have a frame pointer.
942 The expression can in principle examine the current function and
943 decide according to the facts, but on most machines the constant 0
944 or the constant 1 suffices. Use 0 when the machine allows code to
945 be generated with no frame pointer, and doing so saves some time
946 or space. Use 1 when there is no possible advantage to avoiding a
949 In certain cases, the compiler does not know how to produce valid
950 code without a frame pointer. The compiler recognizes those cases
951 and automatically gives the function a frame pointer regardless of
952 what `FRAME_POINTER_REQUIRED' says. You don't need to worry about
955 In a function that does not require a frame pointer, the frame
956 pointer register can be allocated for ordinary usage, unless you
957 mark it as a fixed register. See `FIXED_REGISTERS' for more
960 #define ELIMINABLE_REGS { \
961 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
962 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM} \
963 ,{FRAME_POINTER_REGNUM+1,STACK_POINTER_REGNUM+1}}
964 /* If defined, this macro specifies a table of register pairs used to
965 eliminate unneeded registers that point into the stack frame. If
966 it is not defined, the only elimination attempted by the compiler
967 is to replace references to the frame pointer with references to
970 The definition of this macro is a list of structure
971 initializations, each of which specifies an original and
972 replacement register.
974 On some machines, the position of the argument pointer is not
975 known until the compilation is completed. In such a case, a
976 separate hard register must be used for the argument pointer.
977 This register can be eliminated by replacing it with either the
978 frame pointer or the argument pointer, depending on whether or not
979 the frame pointer has been eliminated.
981 In this case, you might specify:
982 #define ELIMINABLE_REGS \
983 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
984 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
985 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
987 Note that the elimination of the argument pointer with the stack
988 pointer is specified first since that is the preferred elimination. */
990 #define CAN_ELIMINATE(FROM, TO) (((FROM) == ARG_POINTER_REGNUM \
991 && (TO) == FRAME_POINTER_REGNUM) \
992 || (((FROM) == FRAME_POINTER_REGNUM \
993 || (FROM) == FRAME_POINTER_REGNUM+1) \
994 && ! FRAME_POINTER_REQUIRED \
996 /* A C expression that returns nonzero if the compiler is allowed to
997 try to replace register number FROM-REG with register number
998 TO-REG. This macro need only be defined if `ELIMINABLE_REGS' is
999 defined, and will usually be the constant 1, since most of the
1000 cases preventing register elimination are things that the compiler
1001 already knows about. */
1003 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1004 OFFSET = initial_elimination_offset (FROM, TO)
1005 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It
1006 specifies the initial difference between the specified pair of
1007 registers. This macro must be defined if `ELIMINABLE_REGS' is
1010 #define RETURN_ADDR_RTX(count, x) \
1011 gen_rtx_MEM (Pmode, memory_address (Pmode, plus_constant (tem, 1)))
1013 #define PUSH_ROUNDING(NPUSHED) (NPUSHED)
1014 /* A C expression that is the number of bytes actually pushed onto the
1015 stack when an instruction attempts to push NPUSHED bytes.
1017 If the target machine does not have a push instruction, do not
1018 define this macro. That directs GCC to use an alternate
1019 strategy: to allocate the entire argument block and then store the
1022 On some machines, the definition
1024 #define PUSH_ROUNDING(BYTES) (BYTES)
1026 will suffice. But on other machines, instructions that appear to
1027 push one byte actually push two bytes in an attempt to maintain
1028 alignment. Then the definition should be
1030 #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1) */
1032 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
1033 /* A C expression that should indicate the number of bytes of its own
1034 arguments that a function pops on returning, or 0 if the function
1035 pops no arguments and the caller must therefore pop them all after
1036 the function returns.
1038 FUNDECL is a C variable whose value is a tree node that describes
1039 the function in question. Normally it is a node of type
1040 `FUNCTION_DECL' that describes the declaration of the function.
1041 From this you can obtain the DECL_ATTRIBUTES of the
1044 FUNTYPE is a C variable whose value is a tree node that describes
1045 the function in question. Normally it is a node of type
1046 `FUNCTION_TYPE' that describes the data type of the function.
1047 From this it is possible to obtain the data types of the value and
1048 arguments (if known).
1050 When a call to a library function is being considered, FUNDECL
1051 will contain an identifier node for the library function. Thus, if
1052 you need to distinguish among various library functions, you can
1053 do so by their names. Note that "library function" in this
1054 context means a function used to perform arithmetic, whose name is
1055 known specially in the compiler and was not mentioned in the C
1056 code being compiled.
1058 STACK-SIZE is the number of bytes of arguments passed on the
1059 stack. If a variable number of bytes is passed, it is zero, and
1060 argument popping will always be the responsibility of the calling
1063 On the VAX, all functions always pop their arguments, so the
1064 definition of this macro is STACK-SIZE. On the 68000, using the
1065 standard calling convention, no functions pop their arguments, so
1066 the value of the macro is always 0 in this case. But an
1067 alternative calling convention is available in which functions
1068 that take a fixed number of arguments pop them but other functions
1069 (such as `printf') pop nothing (the caller pops all). When this
1070 convention is in use, FUNTYPE is examined to determine whether a
1071 function takes a fixed number of arguments. */
1073 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) (function_arg (&(CUM), MODE, TYPE, NAMED))
1074 /* A C expression that controls whether a function argument is passed
1075 in a register, and which register.
1077 The arguments are CUM, which summarizes all the previous
1078 arguments; MODE, the machine mode of the argument; TYPE, the data
1079 type of the argument as a tree node or 0 if that is not known
1080 (which happens for C support library functions); and NAMED, which
1081 is 1 for an ordinary argument and 0 for nameless arguments that
1082 correspond to `...' in the called function's prototype.
1084 The value of the expression is usually either a `reg' RTX for the
1085 hard register in which to pass the argument, or zero to pass the
1086 argument on the stack.
1088 For machines like the VAX and 68000, where normally all arguments
1089 are pushed, zero suffices as a definition.
1091 The value of the expression can also be a `parallel' RTX. This is
1092 used when an argument is passed in multiple locations. The mode
1093 of the of the `parallel' should be the mode of the entire
1094 argument. The `parallel' holds any number of `expr_list' pairs;
1095 each one describes where part of the argument is passed. In each
1096 `expr_list', the first operand can be either a `reg' RTX for the
1097 hard register in which to pass this part of the argument, or zero
1098 to pass the argument on the stack. If this operand is a `reg',
1099 then the mode indicates how large this part of the argument is.
1100 The second operand of the `expr_list' is a `const_int' which gives
1101 the offset in bytes into the entire argument where this part
1104 The usual way to make the ANSI library `stdarg.h' work on a machine
1105 where some arguments are usually passed in registers, is to cause
1106 nameless arguments to be passed on the stack instead. This is done
1107 by making `FUNCTION_ARG' return 0 whenever NAMED is 0.
1109 You may use the macro `MUST_PASS_IN_STACK (MODE, TYPE)' in the
1110 definition of this macro to determine if this argument is of a
1111 type that must be passed in the stack. If `REG_PARM_STACK_SPACE'
1112 is not defined and `FUNCTION_ARG' returns nonzero for such an
1113 argument, the compiler will abort. If `REG_PARM_STACK_SPACE' is
1114 defined, the argument will be computed in the stack and then
1115 loaded into a register. */
1117 typedef struct avr_args {
1118 int nregs; /* # registers available for passing */
1119 int regno; /* next available register number */
1121 /* A C type for declaring a variable that is used as the first
1122 argument of `FUNCTION_ARG' and other related values. For some
1123 target machines, the type `int' suffices and can hold the number
1124 of bytes of argument so far.
1126 There is no need to record in `CUMULATIVE_ARGS' anything about the
1127 arguments that have been passed on the stack. The compiler has
1128 other variables to keep track of that. For target machines on
1129 which all arguments are passed on the stack, there is no need to
1130 store anything in `CUMULATIVE_ARGS'; however, the data structure
1131 must exist and should not be empty, so use `int'. */
1133 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL) init_cumulative_args (&(CUM), FNTYPE, LIBNAME, FNDECL)
1135 /* A C statement (sans semicolon) for initializing the variable CUM
1136 for the state at the beginning of the argument list. The variable
1137 has type `CUMULATIVE_ARGS'. The value of FNTYPE is the tree node
1138 for the data type of the function which will receive the args, or 0
1139 if the args are to a compiler support library function. The value
1140 of INDIRECT is nonzero when processing an indirect call, for
1141 example a call through a function pointer. The value of INDIRECT
1142 is zero for a call to an explicitly named function, a library
1143 function call, or when `INIT_CUMULATIVE_ARGS' is used to find
1144 arguments for the function being compiled.
1146 When processing a call to a compiler support library function,
1147 LIBNAME identifies which one. It is a `symbol_ref' rtx which
1148 contains the name of the function, as a string. LIBNAME is 0 when
1149 an ordinary C function call is being processed. Thus, each time
1150 this macro is called, either LIBNAME or FNTYPE is nonzero, but
1151 never both of them at once. */
1153 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
1154 (function_arg_advance (&CUM, MODE, TYPE, NAMED))
1156 /* A C statement (sans semicolon) to update the summarizer variable
1157 CUM to advance past an argument in the argument list. The values
1158 MODE, TYPE and NAMED describe that argument. Once this is done,
1159 the variable CUM is suitable for analyzing the *following*
1160 argument with `FUNCTION_ARG', etc.
1162 This macro need not do anything if the argument in question was
1163 passed on the stack. The compiler knows how to track the amount
1164 of stack space used for arguments without any special help. */
1166 #define FUNCTION_ARG_REGNO_P(r) function_arg_regno_p(r)
1167 /* A C expression that is nonzero if REGNO is the number of a hard
1168 register in which function arguments are sometimes passed. This
1169 does *not* include implicit arguments such as the static chain and
1170 the structure-value address. On many machines, no registers can be
1171 used for this purpose since all function arguments are pushed on
1174 extern int avr_reg_order[];
1176 #define RET_REGISTER avr_ret_register ()
1178 #define FUNCTION_VALUE(VALTYPE, FUNC) avr_function_value (VALTYPE, FUNC)
1179 /* A C expression to create an RTX representing the place where a
1180 function returns a value of data type VALTYPE. VALTYPE is a tree
1181 node representing a data type. Write `TYPE_MODE (VALTYPE)' to get
1182 the machine mode used to represent that type. On many machines,
1183 only the mode is relevant. (Actually, on most machines, scalar
1184 values are returned in the same place regardless of mode).
1186 The value of the expression is usually a `reg' RTX for the hard
1187 register where the return value is stored. The value can also be a
1188 `parallel' RTX, if the return value is in multiple places. See
1189 `FUNCTION_ARG' for an explanation of the `parallel' form.
1191 If `PROMOTE_FUNCTION_RETURN' is defined, you must apply the same
1192 promotion rules specified in `PROMOTE_MODE' if VALTYPE is a scalar
1195 If the precise function being called is known, FUNC is a tree node
1196 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This
1197 makes it possible to use a different value-returning convention
1198 for specific functions when all their calls are known.
1200 `FUNCTION_VALUE' is not used for return vales with aggregate data
1201 types, because these are returned in another way. See
1202 `STRUCT_VALUE_REGNUM' and related macros, below. */
1204 #define LIBCALL_VALUE(MODE) avr_libcall_value (MODE)
1205 /* A C expression to create an RTX representing the place where a
1206 library function returns a value of mode MODE. If the precise
1207 function being called is known, FUNC is a tree node
1208 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This
1209 makes it possible to use a different value-returning convention
1210 for specific functions when all their calls are known.
1212 Note that "library function" in this context means a compiler
1213 support routine, used to perform arithmetic, whose name is known
1214 specially by the compiler and was not mentioned in the C code being
1217 The definition of `LIBRARY_VALUE' need not be concerned aggregate
1218 data types, because none of the library functions returns such
1221 #define FUNCTION_VALUE_REGNO_P(N) ((int) (N) == RET_REGISTER)
1222 /* A C expression that is nonzero if REGNO is the number of a hard
1223 register in which the values of called function may come back.
1225 A register whose use for returning values is limited to serving as
1226 the second of a pair (for a value of type `double', say) need not
1227 be recognized by this macro. So for most machines, this definition
1230 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
1232 If the machine has register windows, so that the caller and the
1233 called function use different registers for the return value, this
1234 macro should recognize only the caller's register numbers. */
1236 #define RETURN_IN_MEMORY(TYPE) ((TYPE_MODE (TYPE) == BLKmode) \
1237 ? int_size_in_bytes (TYPE) > 8 \
1239 /* A C expression which can inhibit the returning of certain function
1240 values in registers, based on the type of value. A nonzero value
1241 says to return the function value in memory, just as large
1242 structures are always returned. Here TYPE will be a C expression
1243 of type `tree', representing the data type of the value.
1245 Note that values of mode `BLKmode' must be explicitly handled by
1246 this macro. Also, the option `-fpcc-struct-return' takes effect
1247 regardless of this macro. On most systems, it is possible to
1248 leave the macro undefined; this causes a default definition to be
1249 used, whose value is the constant 1 for `BLKmode' values, and 0
1252 Do not use this macro to indicate that structures and unions
1253 should always be returned in memory. You should instead use
1254 `DEFAULT_PCC_STRUCT_RETURN' to indicate this. */
1256 #define DEFAULT_PCC_STRUCT_RETURN 0
1257 /* Define this macro to be 1 if all structure and union return values
1258 must be in memory. Since this results in slower code, this should
1259 be defined only if needed for compatibility with other compilers
1260 or with an ABI. If you define this macro to be 0, then the
1261 conventions used for structure and union return values are decided
1262 by the `RETURN_IN_MEMORY' macro.
1264 If not defined, this defaults to the value 1. */
1266 #define STRUCT_VALUE 0
1267 /* If the structure value address is not passed in a register, define
1268 `STRUCT_VALUE' as an expression returning an RTX for the place
1269 where the address is passed. If it returns 0, the address is
1270 passed as an "invisible" first argument. */
1272 #define STRUCT_VALUE_INCOMING 0
1273 /* If the incoming location is not a register, then you should define
1274 `STRUCT_VALUE_INCOMING' as an expression for an RTX for where the
1275 called function should find the value. If it should find the
1276 value on the stack, define this to create a `mem' which refers to
1277 the frame pointer. A definition of 0 means that the address is
1278 passed as an "invisible" first argument. */
1280 #define EPILOGUE_USES(REGNO) 0
1281 /* Define this macro as a C expression that is nonzero for registers
1282 are used by the epilogue or the `return' pattern. The stack and
1283 frame pointer registers are already be assumed to be used as
1286 #define STRICT_ARGUMENT_NAMING 1
1287 /* Define this macro if the location where a function argument is
1288 passed depends on whether or not it is a named argument.
1290 This macro controls how the NAMED argument to `FUNCTION_ARG' is
1291 set for varargs and stdarg functions. With this macro defined,
1292 the NAMED argument is always true for named arguments, and false
1293 for unnamed arguments. If this is not defined, but
1294 `SETUP_INCOMING_VARARGS' is defined, then all arguments are
1295 treated as named. Otherwise, all named arguments except the last
1296 are treated as named. */
1299 #define HAVE_POST_INCREMENT 1
1300 /* Define this macro if the machine supports post-increment
1303 #define HAVE_PRE_DECREMENT 1
1304 /* Similar for other kinds of addressing. */
1306 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
1307 /* A C expression that is 1 if the RTX X is a constant which is a
1308 valid address. On most machines, this can be defined as
1309 `CONSTANT_P (X)', but a few machines are more restrictive in which
1310 constant addresses are supported.
1312 `CONSTANT_P' accepts integer-values expressions whose values are
1313 not explicitly known, such as `symbol_ref', `label_ref', and
1314 `high' expressions and `const' arithmetic expressions, in addition
1315 to `const_int' and `const_double' expressions. */
1317 #define MAX_REGS_PER_ADDRESS 1
1318 /* A number, the maximum number of registers that can appear in a
1319 valid memory address. Note that it is up to you to specify a
1320 value equal to the maximum number that `GO_IF_LEGITIMATE_ADDRESS'
1321 would ever accept. */
1323 #ifdef REG_OK_STRICT
1324 # define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
1326 if (legitimate_address_p (mode, operand, 1)) \
1330 # define GO_IF_LEGITIMATE_ADDRESS(mode, operand, ADDR) \
1332 if (legitimate_address_p (mode, operand, 0)) \
1336 /* A C compound statement with a conditional `goto LABEL;' executed
1337 if X (an RTX) is a legitimate memory address on the target machine
1338 for a memory operand of mode MODE. */
1340 /* `REG_OK_FOR_BASE_P (X)'
1341 A C expression that is nonzero if X (assumed to be a `reg' RTX) is
1342 valid for use as a base register. For hard registers, it should
1343 always accept those which the hardware permits and reject the
1344 others. Whether the macro accepts or rejects pseudo registers
1345 must be controlled by `REG_OK_STRICT' as described above. This
1346 usually requires two variant definitions, of which `REG_OK_STRICT'
1347 controls the one actually used. */
1349 #define REG_OK_FOR_BASE_NOSTRICT_P(X) \
1350 (REGNO (X) >= FIRST_PSEUDO_REGISTER || REG_OK_FOR_BASE_STRICT_P(X))
1352 #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
1354 #ifdef REG_OK_STRICT
1355 # define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P (X)
1357 # define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NOSTRICT_P (X)
1360 /* A C expression that is just like `REG_OK_FOR_BASE_P', except that
1361 that expression may examine the mode of the memory reference in
1362 MODE. You should define this macro if the mode of the memory
1363 reference affects whether a register may be used as a base
1364 register. If you define this macro, the compiler will use it
1365 instead of `REG_OK_FOR_BASE_P'. */
1366 #define REG_OK_FOR_INDEX_P(X) 0
1367 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is
1368 valid for use as an index register.
1370 The difference between an index register and a base register is
1371 that the index register may be scaled. If an address involves the
1372 sum of two registers, neither one of them scaled, then either one
1373 may be labeled the "base" and the other the "index"; but whichever
1374 labeling is used must fit the machine's constraints of which
1375 registers may serve in each capacity. The compiler will try both
1376 labelings, looking for one that is valid, and will reload one or
1377 both registers only if neither labeling works. */
1379 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
1381 (X) = legitimize_address (X, OLDX, MODE); \
1382 if (memory_address_p (MODE, X)) \
1385 /* A C compound statement that attempts to replace X with a valid
1386 memory address for an operand of mode MODE. WIN will be a C
1387 statement label elsewhere in the code; the macro definition may use
1389 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN);
1391 to avoid further processing if the address has become legitimate.
1393 X will always be the result of a call to `break_out_memory_refs',
1394 and OLDX will be the operand that was given to that function to
1397 The code generated by this macro should not alter the substructure
1398 of X. If it transforms X into a more legitimate form, it should
1399 assign X (which will always be a C variable) a new value.
1401 It is not necessary for this macro to come up with a legitimate
1402 address. The compiler has standard ways of doing so in all cases.
1403 In fact, it is safe for this macro to do nothing. But often a
1404 machine-dependent strategy can generate better code. */
1406 #define XEXP_(X,Y) (X)
1407 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN) \
1409 if (1&&(GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC)) \
1411 push_reload (XEXP (X,0), XEXP (X,0), &XEXP (X,0), &XEXP (X,0), \
1412 POINTER_REGS, GET_MODE (X),GET_MODE (X) , 0, 0, \
1413 OPNUM, RELOAD_OTHER); \
1416 if (GET_CODE (X) == PLUS \
1417 && REG_P (XEXP (X, 0)) \
1418 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1419 && INTVAL (XEXP (X, 1)) >= 1) \
1421 int fit = INTVAL (XEXP (X, 1)) <= (64 - GET_MODE_SIZE (MODE)); \
1424 if (reg_equiv_address[REGNO (XEXP (X, 0))] != 0) \
1426 int regno = REGNO (XEXP (X, 0)); \
1427 rtx mem = make_memloc (X, regno); \
1428 push_reload (XEXP (mem,0), NULL, &XEXP (mem,0), NULL, \
1429 POINTER_REGS, Pmode, VOIDmode, 0, 0, \
1430 1, ADDR_TYPE (TYPE)); \
1431 push_reload (mem, NULL_RTX, &XEXP (X, 0), NULL, \
1432 BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
1436 push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL, \
1437 BASE_POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
1441 else if (! (frame_pointer_needed && XEXP (X,0) == frame_pointer_rtx)) \
1443 push_reload (X, NULL_RTX, &X, NULL, \
1444 POINTER_REGS, GET_MODE (X), VOIDmode, 0, 0, \
1450 /* A C compound statement that attempts to replace X, which is an
1451 address that needs reloading, with a valid memory address for an
1452 operand of mode MODE. WIN will be a C statement label elsewhere
1453 in the code. It is not necessary to define this macro, but it
1454 might be useful for performance reasons.
1456 For example, on the i386, it is sometimes possible to use a single
1457 reload register instead of two by reloading a sum of two pseudo
1458 registers into a register. On the other hand, for number of RISC
1459 processors offsets are limited so that often an intermediate
1460 address needs to be generated in order to address a stack slot.
1461 By defining LEGITIMIZE_RELOAD_ADDRESS appropriately, the
1462 intermediate addresses generated for adjacent some stack slots can
1463 be made identical, and thus be shared.
1465 *Note*: This macro should be used with caution. It is necessary
1466 to know something of how reload works in order to effectively use
1467 this, and it is quite easy to produce macros that build in too
1468 much knowledge of reload internals.
1470 *Note*: This macro must be able to reload an address created by a
1471 previous invocation of this macro. If it fails to handle such
1472 addresses then the compiler may generate incorrect code or abort.
1474 The macro definition should use `push_reload' to indicate parts
1475 that need reloading; OPNUM, TYPE and IND_LEVELS are usually
1476 suitable to be passed unaltered to `push_reload'.
1478 The code generated by this macro must not alter the substructure of
1479 X. If it transforms X into a more legitimate form, it should
1480 assign X (which will always be a C variable) a new value. This
1481 also applies to parts that you change indirectly by calling
1484 The macro definition may use `strict_memory_address_p' to test if
1485 the address has become legitimate.
1487 If you want to change only a part of X, one standard way of doing
1488 this is to use `copy_rtx'. Note, however, that is unshares only a
1489 single level of rtl. Thus, if the part to be changed is not at the
1490 top level, you'll need to replace first the top leve It is not
1491 necessary for this macro to come up with a legitimate address;
1492 but often a machine-dependent strategy can generate better code. */
1494 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \
1495 if (GET_CODE (ADDR) == POST_INC || GET_CODE (ADDR) == PRE_DEC) \
1497 /* A C statement or compound statement with a conditional `goto
1498 LABEL;' executed if memory address X (an RTX) can have different
1499 meanings depending on the machine mode of the memory reference it
1500 is used for or if the address is valid for some modes but not
1503 Autoincrement and autodecrement addresses typically have
1504 mode-dependent effects because the amount of the increment or
1505 decrement is the size of the operand being addressed. Some
1506 machines have other mode-dependent addresses. Many RISC machines
1507 have no mode-dependent addresses.
1509 You may assume that ADDR is a valid address for the machine. */
1511 #define LEGITIMATE_CONSTANT_P(X) 1
1512 /* A C expression that is nonzero if X is a legitimate constant for
1513 an immediate operand on the target machine. You can assume that X
1514 satisfies `CONSTANT_P', so you need not check this. In fact, `1'
1515 is a suitable definition for this macro on machines where anything
1516 `CONSTANT_P' is valid. */
1518 #define REGISTER_MOVE_COST(MODE, FROM, TO) ((FROM) == STACK_REG ? 6 \
1519 : (TO) == STACK_REG ? 12 \
1521 /* A C expression for the cost of moving data from a register in class
1522 FROM to one in class TO. The classes are expressed using the
1523 enumeration values such as `GENERAL_REGS'. A value of 2 is the
1524 default; other values are interpreted relative to that.
1526 It is not required that the cost always equal 2 when FROM is the
1527 same as TO; on some machines it is expensive to move between
1528 registers if they are not general registers.
1530 If reload sees an insn consisting of a single `set' between two
1531 hard registers, and if `REGISTER_MOVE_COST' applied to their
1532 classes returns a value of 2, reload does not check to ensure that
1533 the constraints of the insn are met. Setting a cost of other than
1534 2 will allow reload to verify that the constraints are met. You
1535 should do this if the `movM' pattern's constraints do not allow
1538 #define MEMORY_MOVE_COST(MODE,CLASS,IN) ((MODE)==QImode ? 2 : \
1539 (MODE)==HImode ? 4 : \
1540 (MODE)==SImode ? 8 : \
1541 (MODE)==SFmode ? 8 : 16)
1542 /* A C expression for the cost of moving data of mode M between a
1543 register and memory. A value of 4 is the default; this cost is
1544 relative to those in `REGISTER_MOVE_COST'.
1546 If moving between registers and memory is more expensive than
1547 between two registers, you should define this macro to express the
1550 #define BRANCH_COST 0
1551 /* A C expression for the cost of a branch instruction. A value of 1
1552 is the default; other values are interpreted relative to that.
1554 Here are additional macros which do not specify precise relative
1555 costs, but only that certain actions are more expensive than GCC would
1556 ordinarily expect. */
1558 #define SLOW_BYTE_ACCESS 0
1559 /* Define this macro as a C expression which is nonzero if accessing
1560 less than a word of memory (i.e. a `char' or a `short') is no
1561 faster than accessing a word of memory, i.e., if such access
1562 require more than one instruction or if there is no difference in
1563 cost between byte and (aligned) word loads.
1565 When this macro is not defined, the compiler will access a field by
1566 finding the smallest containing object; when it is defined, a
1567 fullword load will be used if alignment permits. Unless bytes
1568 accesses are faster than word accesses, using word accesses is
1569 preferable since it may eliminate subsequent memory access if
1570 subsequent accesses occur to other fields in the same word of the
1571 structure, but to different bytes.
1573 `SLOW_UNALIGNED_ACCESS'
1574 Define this macro to be the value 1 if unaligned accesses have a
1575 cost many times greater than aligned accesses, for example if they
1576 are emulated in a trap handler.
1578 When this macro is nonzero, the compiler will act as if
1579 `STRICT_ALIGNMENT' were nonzero when generating code for block
1580 moves. This can cause significantly more instructions to be
1581 produced. Therefore, do not set this macro nonzero if unaligned
1582 accesses only add a cycle or two to the time for a memory access.
1584 If the value of this macro is always zero, it need not be defined.
1587 The number of scalar move insns which should be generated instead
1588 of a string move insn or a library call. Increasing the value
1589 will always make code faster, but eventually incurs high cost in
1590 increased code size.
1592 If you don't define this, a reasonable default is used. */
1594 #define NO_FUNCTION_CSE
1595 /* Define this macro if it is as good or better to call a constant
1596 function address than to call an address kept in a register. */
1598 #define NO_RECURSIVE_FUNCTION_CSE
1599 /* Define this macro if it is as good or better for a function to call
1600 itself with an explicit address than to call an address kept in a
1603 #define TEXT_SECTION_ASM_OP "\t.text"
1604 /* A C expression whose value is a string containing the assembler
1605 operation that should precede instructions and read-only data.
1606 Normally `"\t.text"' is right. */
1608 #define DATA_SECTION_ASM_OP "\t.data"
1609 /* A C expression whose value is a string containing the assembler
1610 operation to identify the following data as writable initialized
1611 data. Normally `"\t.data"' is right. */
1613 #define BSS_SECTION_ASM_OP "\t.section .bss"
1614 /* If defined, a C expression whose value is a string, including
1615 spacing, containing the assembler operation to identify the
1616 following data as uninitialized global data. If not defined, and
1617 neither `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
1618 uninitialized global data will be output in the data section if
1619 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
1622 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
1623 There are no shared libraries on this target, and these sections are
1624 placed in the read-only program memory, so they are not writable. */
1626 #undef CTORS_SECTION_ASM_OP
1627 #define CTORS_SECTION_ASM_OP "\t.section .ctors,\"a\",@progbits"
1629 #undef DTORS_SECTION_ASM_OP
1630 #define DTORS_SECTION_ASM_OP "\t.section .dtors,\"a\",@progbits"
1632 #define TARGET_ASM_CONSTRUCTOR avr_asm_out_ctor
1633 /* If defined, a function that outputs assembler code to arrange to
1634 call the function referenced by SYMBOL at initialization time. */
1636 #define TARGET_ASM_DESTRUCTOR avr_asm_out_dtor
1637 /* This is like `TARGET_ASM_CONSTRUCTOR' but used for termination
1638 functions rather than initialization functions. */
1640 #define EXTRA_SECTIONS in_progmem
1641 /* A list of names for sections other than the standard two, which are
1642 `in_text' and `in_data'. You need not define this macro on a
1643 system with no other sections (that GCC needs to use). */
1645 #define EXTRA_SECTION_FUNCTIONS \
1648 progmem_section (void) \
1650 if (in_section != in_progmem) \
1652 fprintf (asm_out_file, \
1653 "\t.section .progmem.gcc_sw_table, \"%s\", @progbits\n", \
1654 AVR_MEGA ? "a" : "ax"); \
1655 /* Should already be aligned, this is just to be safe if it isn't. */ \
1656 fprintf (asm_out_file, "\t.p2align 1\n"); \
1657 in_section = in_progmem; \
1660 /* `EXTRA_SECTION_FUNCTIONS'
1661 One or more functions to be defined in `varasm.c'. These
1662 functions should do jobs analogous to those of `text_section' and
1663 `data_section', for your additional sections. Do not define this
1664 macro if you do not define `EXTRA_SECTIONS'. */
1666 #define READONLY_DATA_SECTION data_section
1667 /* On most machines, read-only variables, constants, and jump tables
1668 are placed in the text section. If this is not the case on your
1669 machine, this macro should be defined to be the name of a function
1670 (either `data_section' or a function defined in `EXTRA_SECTIONS')
1671 that switches to the section to be used for read-only items.
1673 If these items should be placed in the text section, this macro
1674 should not be defined. */
1676 #define JUMP_TABLES_IN_TEXT_SECTION 0
1677 /* Define this macro if jump tables (for `tablejump' insns) should be
1678 output in the text section, along with the assembler instructions.
1679 Otherwise, the readonly data section is used.
1681 This macro is irrelevant if there is no separate readonly data
1684 #define ASM_COMMENT_START " ; "
1685 /* A C string constant describing how to begin a comment in the target
1686 assembler language. The compiler assumes that the comment will
1687 end at the end of the line. */
1689 #define ASM_APP_ON "/* #APP */\n"
1690 /* A C string constant for text to be output before each `asm'
1691 statement or group of consecutive ones. Normally this is
1692 `"#APP"', which is a comment that has no effect on most assemblers
1693 but tells the GNU assembler that it must check the lines that
1694 follow for all valid assembler constructs. */
1696 #define ASM_APP_OFF "/* #NOAPP */\n"
1697 /* A C string constant for text to be output after each `asm'
1698 statement or group of consecutive ones. Normally this is
1699 `"#NO_APP"', which tells the GNU assembler to resume making the
1700 time-saving assumptions that are valid for ordinary compiler
1703 #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE, COUNTER) \
1704 fprintf (STREAM,"/* line: %d */\n",LINE)
1705 /* A C statement to output DBX or SDB debugging information before
1706 code for line number LINE of the current source file to the stdio
1709 This macro need not be defined if the standard form of debugging
1710 information for the debugger in use is appropriate. */
1712 /* Switch into a generic section. */
1713 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
1715 #define ASM_OUTPUT_ASCII(FILE, P, SIZE) gas_output_ascii (FILE,P,SIZE)
1716 /* `ASM_OUTPUT_ASCII (STREAM, PTR, LEN)'
1717 output_ascii (FILE, P, SIZE)
1718 A C statement to output to the stdio stream STREAM an assembler
1719 instruction to assemble a string constant containing the LEN bytes
1720 at PTR. PTR will be a C expression of type `char *' and LEN a C
1721 expression of type `int'.
1723 If the assembler has a `.ascii' pseudo-op as found in the Berkeley
1724 Unix assembler, do not define the macro `ASM_OUTPUT_ASCII'. */
1726 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == '\n' \
1728 /* Define this macro as a C expression which is nonzero if C is used
1729 as a logical line separator by the assembler.
1731 If you do not define this macro, the default is that only the
1732 character `;' is treated as a logical line separator. */
1734 /* These macros are provided by `real.h' for writing the definitions of
1735 `ASM_OUTPUT_DOUBLE' and the like: */
1737 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \
1739 fputs ("\t.comm ", (STREAM)); \
1740 assemble_name ((STREAM), (NAME)); \
1741 fprintf ((STREAM), ",%lu,1\n", (unsigned long)(SIZE)); \
1743 /* A C statement (sans semicolon) to output to the stdio stream
1744 STREAM the assembler definition of a common-label named NAME whose
1745 size is SIZE bytes. The variable ROUNDED is the size rounded up
1746 to whatever alignment the caller wants.
1748 Use the expression `assemble_name (STREAM, NAME)' to output the
1749 name itself; before and after that, output the additional
1750 assembler syntax for defining the name, and a newline.
1752 This macro controls how the assembler definitions of uninitialized
1753 common global variables are output. */
1755 #define ASM_OUTPUT_BSS(FILE, DECL, NAME, SIZE, ROUNDED) \
1756 asm_output_bss ((FILE), (DECL), (NAME), (SIZE), (ROUNDED))
1757 /* A C statement (sans semicolon) to output to the stdio stream
1758 STREAM the assembler definition of uninitialized global DECL named
1759 NAME whose size is SIZE bytes. The variable ROUNDED is the size
1760 rounded up to whatever alignment the caller wants. */
1762 #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) \
1764 fputs ("\t.lcomm ", (STREAM)); \
1765 assemble_name ((STREAM), (NAME)); \
1766 fprintf ((STREAM), ",%d\n", (int)(SIZE)); \
1768 /* A C statement (sans semicolon) to output to the stdio stream
1769 STREAM the assembler definition of a local-common-label named NAME
1770 whose size is SIZE bytes. The variable ROUNDED is the size
1771 rounded up to whatever alignment the caller wants.
1773 Use the expression `assemble_name (STREAM, NAME)' to output the
1774 name itself; before and after that, output the additional
1775 assembler syntax for defining the name, and a newline.
1777 This macro controls how the assembler definitions of uninitialized
1778 static variables are output. */
1783 #define TYPE_ASM_OP "\t.type\t"
1784 #define SIZE_ASM_OP "\t.size\t"
1785 #define WEAK_ASM_OP "\t.weak\t"
1786 /* Define the strings used for the special svr4 .type and .size directives.
1787 These strings generally do not vary from one system running svr4 to
1788 another, but if a given system (e.g. m88k running svr) needs to use
1789 different pseudo-op names for these, they may be overridden in the
1790 file which includes this one. */
1793 #undef TYPE_OPERAND_FMT
1794 #define TYPE_OPERAND_FMT "@%s"
1795 /* The following macro defines the format used to output the second
1796 operand of the .type assembler directive. Different svr4 assemblers
1797 expect various different forms for this operand. The one given here
1798 is just a default. You may need to override it in your machine-
1799 specific tm.h file (depending upon the particulars of your assembler). */
1801 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
1803 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \
1804 ASM_OUTPUT_LABEL (FILE, NAME); \
1807 /* A C statement (sans semicolon) to output to the stdio stream
1808 STREAM any text necessary for declaring the name NAME of a
1809 function which is being defined. This macro is responsible for
1810 outputting the label definition (perhaps using
1811 `ASM_OUTPUT_LABEL'). The argument DECL is the `FUNCTION_DECL'
1812 tree node representing the function.
1814 If this macro is not defined, then the function name is defined in
1815 the usual manner as a label (by means of `ASM_OUTPUT_LABEL'). */
1817 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
1819 if (!flag_inhibit_size_directive) \
1820 ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME); \
1822 /* A C statement (sans semicolon) to output to the stdio stream
1823 STREAM any text necessary for declaring the size of a function
1824 which is being defined. The argument NAME is the name of the
1825 function. The argument DECL is the `FUNCTION_DECL' tree node
1826 representing the function.
1828 If this macro is not defined, then the function size is not
1831 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
1833 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \
1834 size_directive_output = 0; \
1835 if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
1837 size_directive_output = 1; \
1838 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, \
1839 int_size_in_bytes (TREE_TYPE (DECL))); \
1841 ASM_OUTPUT_LABEL(FILE, NAME); \
1843 /* A C statement (sans semicolon) to output to the stdio stream
1844 STREAM any text necessary for declaring the name NAME of an
1845 initialized variable which is being defined. This macro must
1846 output the label definition (perhaps using `ASM_OUTPUT_LABEL').
1847 The argument DECL is the `VAR_DECL' tree node representing the
1850 If this macro is not defined, then the variable name is defined in
1851 the usual manner as a label (by means of `ASM_OUTPUT_LABEL'). */
1853 #undef ASM_FINISH_DECLARE_OBJECT
1854 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
1856 const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
1857 HOST_WIDE_INT size; \
1858 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
1859 && ! AT_END && TOP_LEVEL \
1860 && DECL_INITIAL (DECL) == error_mark_node \
1861 && !size_directive_output) \
1863 size_directive_output = 1; \
1864 size = int_size_in_bytes (TREE_TYPE (DECL)); \
1865 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size); \
1869 /* A C statement (sans semicolon) to finish up declaring a variable
1870 name once the compiler has processed its initializer fully and
1871 thus has had a chance to determine the size of an array when
1872 controlled by an initializer. This is used on systems where it's
1873 necessary to declare something about the size of the object.
1875 If you don't define this macro, that is equivalent to defining it
1880 "\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\
1881 \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\
1882 \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\
1883 \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\
1884 \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\
1885 \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\
1886 \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\
1887 \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"
1888 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
1889 ASM_OUTPUT_LIMITED_STRING macros. Each byte in the table
1890 corresponds to a particular byte value [0..255]. For any
1891 given byte value, if the value in the corresponding table
1892 position is zero, the given character can be output directly.
1893 If the table value is 1, the byte must be output as a \ooo
1894 octal escape. If the tables value is anything else, then the
1895 byte value should be output as a \ followed by the value
1896 in the table. Note that we can use standard UN*X escape
1897 sequences for many control characters, but we don't use
1898 \a to represent BEL because some svr4 assemblers (e.g. on
1899 the i386) don't know about that. Also, we don't use \v
1900 since some versions of gas, such as 2.2 did not accept it. */
1902 #define STRING_LIMIT ((unsigned) 64)
1903 #define STRING_ASM_OP "\t.string\t"
1904 /* Some svr4 assemblers have a limit on the number of characters which
1905 can appear in the operand of a .string directive. If your assembler
1906 has such a limitation, you should define STRING_LIMIT to reflect that
1907 limit. Note that at least some svr4 assemblers have a limit on the
1908 actual number of bytes in the double-quoted string, and that they
1909 count each character in an escape sequence as one byte. Thus, an
1910 escape sequence like \377 would count as four bytes.
1912 If your target assembler doesn't support the .string directive, you
1913 should define this to zero. */
1915 /* Globalizing directive for a label. */
1916 #define GLOBAL_ASM_OP ".global\t"
1918 #define ASM_WEAKEN_LABEL(FILE, NAME) \
1921 fputs ("\t.weak\t", (FILE)); \
1922 assemble_name ((FILE), (NAME)); \
1923 fputc ('\n', (FILE)); \
1927 /* A C statement (sans semicolon) to output to the stdio stream
1928 STREAM some commands that will make the label NAME weak; that is,
1929 available for reference from other files but only used if no other
1930 definition is available. Use the expression `assemble_name
1931 (STREAM, NAME)' to output the name itself; before and after that,
1932 output the additional assembler syntax for making that name weak,
1935 If you don't define this macro, GCC will not support weak
1936 symbols and you should not define the `SUPPORTS_WEAK' macro.
1939 #define SUPPORTS_WEAK 1
1940 /* A C expression which evaluates to true if the target supports weak
1943 If you don't define this macro, `defaults.h' provides a default
1944 definition. If `ASM_WEAKEN_LABEL' is defined, the default
1945 definition is `1'; otherwise, it is `0'. Define this macro if you
1946 want to control weak symbol support with a compiler flag such as
1949 `MAKE_DECL_ONE_ONLY'
1950 A C statement (sans semicolon) to mark DECL to be emitted as a
1951 public symbol such that extra copies in multiple translation units
1952 will be discarded by the linker. Define this macro if your object
1953 file format provides support for this concept, such as the `COMDAT'
1954 section flags in the Microsoft Windows PE/COFF format, and this
1955 support requires changes to DECL, such as putting it in a separate
1959 A C expression which evaluates to true if the target supports
1962 If you don't define this macro, `varasm.c' provides a default
1963 definition. If `MAKE_DECL_ONE_ONLY' is defined, the default
1964 definition is `1'; otherwise, it is `0'. Define this macro if you
1965 want to control weak symbol support with a compiler flag, or if
1966 setting the `DECL_ONE_ONLY' flag is enough to mark a declaration to
1967 be emitted as one-only. */
1969 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM) \
1970 sprintf (STRING, "*.%s%lu", PREFIX, (unsigned long)(NUM))
1971 /* A C statement to store into the string STRING a label whose name
1972 is made from the string PREFIX and the number NUM.
1974 This string, when output subsequently by `assemble_name', should
1975 produce the output that `(*targetm.asm_out.internal_label)' would produce
1976 with the same PREFIX and NUM.
1978 If the string begins with `*', then `assemble_name' will output
1979 the rest of the string unchanged. It is often convenient for
1980 `ASM_GENERATE_INTERNAL_LABEL' to use `*' in this way. If the
1981 string doesn't start with `*', then `ASM_OUTPUT_LABELREF' gets to
1982 output the string, and may change it. (Of course,
1983 `ASM_OUTPUT_LABELREF' is also part of your machine description, so
1984 you should know what it does on your machine.) */
1986 /* `ASM_OUTPUT_WEAK_ALIAS (STREAM, NAME, VALUE)'
1987 A C statement to output to the stdio stream STREAM assembler code
1988 which defines (equates) the weak symbol NAME to have the value
1991 Define this macro if the target only supports weak aliases; define
1992 ASM_OUTPUT_DEF instead if possible. */
1994 #define HAS_INIT_SECTION 1
1995 /* If defined, `main' will not call `__main' as described above.
1996 This macro should be defined for systems that control the contents
1997 of the init section on a symbol-by-symbol basis, such as OSF/1,
1998 and should not be defined explicitly for systems that support
1999 `INIT_SECTION_ASM_OP'. */
2001 #define REGISTER_NAMES { \
2002 "r0","r1","r2","r3","r4","r5","r6","r7", \
2003 "r8","r9","r10","r11","r12","r13","r14","r15", \
2004 "r16","r17","r18","r19","r20","r21","r22","r23", \
2005 "r24","r25","r26","r27","r28","r29","r30","r31", \
2006 "__SPL__","__SPH__","argL","argH"}
2007 /* A C initializer containing the assembler's names for the machine
2008 registers, each one as a C string constant. This is what
2009 translates register numbers in the compiler into assembler
2012 #define FINAL_PRESCAN_INSN(insn, operand, nop) final_prescan_insn (insn, operand,nop)
2013 /* If defined, a C statement to be executed just prior to the output
2014 of assembler code for INSN, to modify the extracted operands so
2015 they will be output differently.
2017 Here the argument OPVEC is the vector containing the operands
2018 extracted from INSN, and NOPERANDS is the number of elements of
2019 the vector which contain meaningful data for this insn. The
2020 contents of this vector are what will be used to convert the insn
2021 template into assembler code, so you can change the assembler
2022 output by changing the contents of the vector.
2024 This macro is useful when various assembler syntaxes share a single
2025 file of instruction patterns; by defining this macro differently,
2026 you can cause a large class of instructions to be output
2027 differently (such as with rearranged operands). Naturally,
2028 variations in assembler syntax affecting individual insn patterns
2029 ought to be handled by writing conditional output routines in
2032 If this macro is not defined, it is equivalent to a null statement. */
2034 #define PRINT_OPERAND(STREAM, X, CODE) print_operand (STREAM, X, CODE)
2035 /* A C compound statement to output to stdio stream STREAM the
2036 assembler syntax for an instruction operand X. X is an RTL
2039 CODE is a value that can be used to specify one of several ways of
2040 printing the operand. It is used when identical operands must be
2041 printed differently depending on the context. CODE comes from the
2042 `%' specification that was used to request printing of the
2043 operand. If the specification was just `%DIGIT' then CODE is 0;
2044 if the specification was `%LTR DIGIT' then CODE is the ASCII code
2047 If X is a register, this macro should print the register's name.
2048 The names can be found in an array `reg_names' whose type is `char
2049 *[]'. `reg_names' is initialized from `REGISTER_NAMES'.
2051 When the machine description has a specification `%PUNCT' (a `%'
2052 followed by a punctuation character), this macro is called with a
2053 null pointer for X and the punctuation character for CODE. */
2055 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '~')
2056 /* A C expression which evaluates to true if CODE is a valid
2057 punctuation character for use in the `PRINT_OPERAND' macro. If
2058 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no
2059 punctuation characters (except for the standard one, `%') are used
2062 #define PRINT_OPERAND_ADDRESS(STREAM, X) print_operand_address(STREAM, X)
2063 /* A C compound statement to output to stdio stream STREAM the
2064 assembler syntax for an instruction operand that is a memory
2065 reference whose address is X. X is an RTL expression. */
2067 #define USER_LABEL_PREFIX ""
2068 /* `LOCAL_LABEL_PREFIX'
2071 If defined, C string expressions to be used for the `%R', `%L',
2072 `%U', and `%I' options of `asm_fprintf' (see `final.c'). These
2073 are useful when a single `md' file must support multiple assembler
2074 formats. In that case, the various `tm.h' files can define these
2075 macros differently. */
2077 #define ASSEMBLER_DIALECT AVR_ENHANCED
2078 /* If your target supports multiple dialects of assembler language
2079 (such as different opcodes), define this macro as a C expression
2080 that gives the numeric index of the assembler language dialect to
2081 use, with zero as the first variant.
2083 If this macro is defined, you may use constructs of the form
2084 `{option0|option1|option2...}' in the output templates of patterns
2085 (*note Output Template::.) or in the first argument of
2086 `asm_fprintf'. This construct outputs `option0', `option1' or
2087 `option2', etc., if the value of `ASSEMBLER_DIALECT' is zero, one
2088 or two, etc. Any special characters within these strings retain
2089 their usual meaning.
2091 If you do not define this macro, the characters `{', `|' and `}'
2092 do not have any special meaning when used in templates or operands
2095 Define the macros `REGISTER_PREFIX', `LOCAL_LABEL_PREFIX',
2096 `USER_LABEL_PREFIX' and `IMMEDIATE_PREFIX' if you can express the
2097 variations in assembler language syntax with that mechanism.
2098 Define `ASSEMBLER_DIALECT' and use the `{option0|option1}' syntax
2099 if the syntax variant are larger and involve such things as
2100 different opcodes or operand order. */
2102 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \
2106 fprintf (STREAM, "\tpush\tr%d", REGNO); \
2108 /* A C expression to output to STREAM some assembler code which will
2109 push hard register number REGNO onto the stack. The code need not
2110 be optimal, since this macro is used only when profiling. */
2112 #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \
2116 fprintf (STREAM, "\tpop\tr%d", REGNO); \
2118 /* A C expression to output to STREAM some assembler code which will
2119 pop hard register number REGNO off of the stack. The code need
2120 not be optimal, since this macro is used only when profiling. */
2122 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
2123 avr_output_addr_vec_elt(STREAM, VALUE)
2124 /* This macro should be provided on machines where the addresses in a
2125 dispatch table are absolute.
2127 The definition should be a C statement to output to the stdio
2128 stream STREAM an assembler pseudo-instruction to generate a
2129 reference to a label. VALUE is the number of an internal label
2130 whose definition is output using `(*targetm.asm_out.internal_label)'. For
2133 fprintf (STREAM, "\t.word L%d\n", VALUE) */
2135 #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, TABLE) \
2136 progmem_section (), (*targetm.asm_out.internal_label) (STREAM, PREFIX, NUM)
2138 /* `ASM_OUTPUT_CASE_LABEL (STREAM, PREFIX, NUM, TABLE)'
2139 Define this if the label before a jump-table needs to be output
2140 specially. The first three arguments are the same as for
2141 `(*targetm.asm_out.internal_label)'; the fourth argument is the jump-table
2142 which follows (a `jump_insn' containing an `addr_vec' or
2145 This feature is used on system V to output a `swbeg' statement for
2148 If this macro is not defined, these labels are output with
2149 `(*targetm.asm_out.internal_label)'. */
2151 /* `ASM_OUTPUT_CASE_END (STREAM, NUM, TABLE)'
2152 Define this if something special must be output at the end of a
2153 jump-table. The definition should be a C statement to be executed
2154 after the assembler code for the table is written. It should write
2155 the appropriate code to stdio stream STREAM. The argument TABLE
2156 is the jump-table insn, and NUM is the label-number of the
2159 If this macro is not defined, nothing special is output at the end
2160 of the jump-table. */
2162 #define ASM_OUTPUT_SKIP(STREAM, N) \
2163 fprintf (STREAM, "\t.skip %lu,0\n", (unsigned long)(N))
2164 /* A C statement to output to the stdio stream STREAM an assembler
2165 instruction to advance the location counter by NBYTES bytes.
2166 Those bytes should be zero when loaded. NBYTES will be a C
2167 expression of type `int'. */
2169 #define ASM_OUTPUT_ALIGN(STREAM, POWER)
2170 /* A C statement to output to the stdio stream STREAM an assembler
2171 command to advance the location counter to a multiple of 2 to the
2172 POWER bytes. POWER will be a C expression of type `int'. */
2174 #define CASE_VECTOR_MODE HImode
2175 /* An alias for a machine mode name. This is the machine mode that
2176 elements of a jump-table should have. */
2178 extern int avr_case_values_threshold;
2180 #define CASE_VALUES_THRESHOLD avr_case_values_threshold
2181 /* `CASE_VALUES_THRESHOLD'
2182 Define this to be the smallest number of different values for
2183 which it is best to use a jump-table instead of a tree of
2184 conditional branches. The default is four for machines with a
2185 `casesi' instruction and five otherwise. This is best for most
2188 #undef WORD_REGISTER_OPERATIONS
2189 /* Define this macro if operations between registers with integral
2190 mode smaller than a word are always performed on the entire
2191 register. Most RISC machines have this property and most CISC
2195 /* The maximum number of bytes that a single instruction can move
2196 quickly between memory and registers or between two memory
2199 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
2200 /* A C expression which is nonzero if on this machine it is safe to
2201 "convert" an integer of INPREC bits to one of OUTPREC bits (where
2202 OUTPREC is smaller than INPREC) by merely operating on it as if it
2203 had only OUTPREC bits.
2205 On many machines, this expression can be 1.
2207 When `TRULY_NOOP_TRUNCATION' returns 1 for a pair of sizes for
2208 modes for which `MODES_TIEABLE_P' is 0, suboptimal code can result.
2209 If this is the case, making `TRULY_NOOP_TRUNCATION' return 0 in
2210 such cases may improve things. */
2212 #define Pmode HImode
2213 /* An alias for the machine mode for pointers. On most machines,
2214 define this to be the integer mode corresponding to the width of a
2215 hardware pointer; `SImode' on 32-bit machine or `DImode' on 64-bit
2216 machines. On some machines you must define this to be one of the
2217 partial integer modes, such as `PSImode'.
2219 The width of `Pmode' must be at least as large as the value of
2220 `POINTER_SIZE'. If it is not equal, you must define the macro
2221 `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to
2224 #define FUNCTION_MODE HImode
2225 /* An alias for the machine mode used for memory references to
2226 functions being called, in `call' RTL expressions. On most
2227 machines this should be `QImode'. */
2229 #define INTEGRATE_THRESHOLD(DECL) (1 + (3 * list_length (DECL_ARGUMENTS (DECL)) / 2))
2231 /* A C expression for the maximum number of instructions above which
2232 the function DECL should not be inlined. DECL is a
2233 `FUNCTION_DECL' node.
2235 The default definition of this macro is 64 plus 8 times the number
2236 of arguments that the function accepts. Some people think a larger
2237 threshold should be used on RISC machines. */
2239 #define DOLLARS_IN_IDENTIFIERS 0
2240 /* Define this macro to control use of the character `$' in identifier
2241 names. 0 means `$' is not allowed by default; 1 means it is
2242 allowed. 1 is the default; there is no need to define this macro
2243 in that case. This macro controls the compiler proper; it does
2244 not affect the preprocessor. */
2246 #define NO_DOLLAR_IN_LABEL 1
2247 /* Define this macro if the assembler does not accept the character
2248 `$' in label names. By default constructors and destructors in
2249 G++ have `$' in the identifiers. If this macro is defined, `.' is
2252 #define GIV_SORT_CRITERION(X, Y) \
2253 if (GET_CODE ((X)->add_val) == CONST_INT \
2254 && GET_CODE ((Y)->add_val) == CONST_INT) \
2255 return INTVAL ((X)->add_val) - INTVAL ((Y)->add_val);
2257 /* `GIV_SORT_CRITERION(GIV1, GIV2)'
2258 In some cases, the strength reduction optimization pass can
2259 produce better code if this is defined. This macro controls the
2260 order that induction variables are combined. This macro is
2261 particularly useful if the target has limited addressing modes.
2262 For instance, the SH target has only positive offsets in
2263 addresses. Thus sorting to put the smallest address first allows
2264 the most combinations to be found. */
2266 #define TRAMPOLINE_TEMPLATE(FILE) \
2267 internal_error ("trampolines not supported")
2269 /* Length in units of the trampoline for entering a nested function. */
2271 #define TRAMPOLINE_SIZE 4
2273 /* Emit RTL insns to initialize the variable parts of a trampoline.
2274 FNADDR is an RTX for the address of the function's pure code.
2275 CXT is an RTX for the static chain value for the function. */
2277 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
2279 emit_move_insn (gen_rtx (MEM, HImode, plus_constant ((TRAMP), 2)), CXT); \
2280 emit_move_insn (gen_rtx (MEM, HImode, plus_constant ((TRAMP), 6)), FNADDR); \
2282 /* Store in cc_status the expressions
2283 that the condition codes will describe
2284 after execution of an instruction whose pattern is EXP.
2285 Do not alter them if the instruction would not alter the cc's. */
2287 #define NOTICE_UPDATE_CC(EXP, INSN) notice_update_cc(EXP, INSN)
2289 /* The add insns don't set overflow in a usable way. */
2290 #define CC_OVERFLOW_UNUSABLE 01000
2291 /* The mov,and,or,xor insns don't set carry. That's ok though as the
2292 Z bit is all we need when doing unsigned comparisons on the result of
2293 these insns (since they're always with 0). However, conditions.h has
2294 CC_NO_OVERFLOW defined for this purpose. Rename it to something more
2296 #define CC_NO_CARRY CC_NO_OVERFLOW
2299 /* Output assembler code to FILE to increment profiler label # LABELNO
2300 for profiling a function entry. */
2302 #define FUNCTION_PROFILER(FILE, LABELNO) \
2303 fprintf (FILE, "/* profiler %d */", (LABELNO))
2305 #define ADJUST_INSN_LENGTH(INSN, LENGTH) (LENGTH =\
2306 adjust_insn_length (INSN, LENGTH))
2307 /* If defined, modifies the length assigned to instruction INSN as a
2308 function of the context in which it is used. LENGTH is an lvalue
2309 that contains the initially computed length of the insn and should
2310 be updated with the correct length of the insn. If updating is
2311 required, INSN must not be a varying-length insn.
2313 This macro will normally not be required. A case in which it is
2314 required is the ROMP. On this machine, the size of an `addr_vec'
2315 insn must be increased by two to compensate for the fact that
2316 alignment may be required. */
2318 #define TARGET_MEM_FUNCTIONS
2319 /* Define this macro if GCC should generate calls to the System V
2320 (and ANSI C) library functions `memcpy' and `memset' rather than
2321 the BSD functions `bcopy' and `bzero'. */
2323 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE}"
2325 /* A C string constant that tells the GCC driver program options to
2326 pass to CPP. It can also specify how to translate options you
2327 give to GCC into options for GCC to pass to the CPP.
2329 Do not define this macro if it does not need to do anything. */
2331 #define CC1_SPEC "%{profile:-p}"
2332 /* A C string constant that tells the GCC driver program options to
2333 pass to `cc1'. It can also specify how to translate options you
2334 give to GCC into options for GCC to pass to the `cc1'.
2336 Do not define this macro if it does not need to do anything. */
2338 #define CC1PLUS_SPEC "%{!frtti:-fno-rtti} \
2339 %{!fenforce-eh-specs:-fno-enforce-eh-specs} \
2340 %{!fexceptions:-fno-exceptions}"
2341 /* A C string constant that tells the GCC drvier program options to
2342 pass to `cc1plus'. */
2344 #define ASM_SPEC "%{mmcu=*:-mmcu=%*}"
2345 /* A C string constant that tells the GCC driver program how to
2346 run any programs which cleanup after the normal assembler.
2347 Normally, this is not needed. See the file `mips.h' for an
2350 Do not define this macro if it does not need to do anything. */
2352 #define LINK_SPEC " %{!mmcu*:-m avr2}\
2353 %{mmcu=at90s1200|mmcu=attiny1*|mmcu=attiny28:-m avr1} \
2354 %{mmcu=attiny22|mmcu=attiny26|mmcu=at90s2*|mmcu=at90s4*|mmcu=at90s8*|mmcu=at90c8*|mmcu=at86rf401:-m avr2}\
2355 %{mmcu=atmega103|mmcu=atmega603|mmcu=at43*|mmcu=at76*:-m avr3}\
2356 %{mmcu=atmega8*:-m avr4}\
2357 %{mmcu=atmega16*|mmcu=atmega32*|mmcu=atmega64|mmcu=atmega128|mmcu=at94k:-m avr5}\
2358 %{mmcu=atmega64|mmcu=atmega128|mmcu=atmega162|mmcu=atmega169: -Tdata 0x800100} "
2360 /* A C string constant that tells the GCC driver program options to
2361 pass to the linker. It can also specify how to translate options
2362 you give to GCC into options for GCC to pass to the linker.
2364 Do not define this macro if it does not need to do anything. */
2367 "%{!mmcu=at90s1*:%{!mmcu=attiny1*:%{!mmcu=attiny28: -lc }}}"
2368 /* Another C string constant used much like `LINK_SPEC'. The
2369 difference between the two is that `LIB_SPEC' is used at the end
2370 of the command given to the linker.
2372 If this macro is not defined, a default is provided that loads the
2373 standard C library from the usual place. See `gcc.c'. */
2375 #define LIBSTDCXX "-lgcc"
2376 /* No libstdc++ for now. Empty string doesn't work. */
2378 #define LIBGCC_SPEC \
2379 "%{!mmcu=at90s1*:%{!mmcu=attiny1*:%{!mmcu=attiny28: -lgcc }}}"
2380 /* Another C string constant that tells the GCC driver program how
2381 and when to place a reference to `libgcc.a' into the linker
2382 command line. This constant is placed both before and after the
2383 value of `LIB_SPEC'.
2385 If this macro is not defined, the GCC driver provides a default
2386 that passes the string `-lgcc' to the linker unless the `-shared'
2387 option is specified. */
2389 #define STARTFILE_SPEC "%(crt_binutils)"
2390 /* Another C string constant used much like `LINK_SPEC'. The
2391 difference between the two is that `STARTFILE_SPEC' is used at the
2392 very beginning of the command given to the linker.
2394 If this macro is not defined, a default is provided that loads the
2395 standard C startup file from the usual place. See `gcc.c'. */
2397 #define ENDFILE_SPEC ""
2398 /* Another C string constant used much like `LINK_SPEC'. The
2399 difference between the two is that `ENDFILE_SPEC' is used at the
2400 very end of the command given to the linker.
2402 Do not define this macro if it does not need to do anything. */
2404 #define CRT_BINUTILS_SPECS "\
2405 %{mmcu=at90s1200|mmcu=avr1:crts1200.o%s} \
2406 %{mmcu=attiny11:crttn11.o%s} \
2407 %{mmcu=attiny12:crttn12.o%s} \
2408 %{mmcu=attiny15:crttn15.o%s} \
2409 %{mmcu=attiny28:crttn28.o%s} \
2410 %{!mmcu*|mmcu=at90s8515|mmcu=avr2:crts8515.o%s} \
2411 %{mmcu=at90s2313:crts2313.o%s} \
2412 %{mmcu=at90s2323:crts2323.o%s} \
2413 %{mmcu=at90s2333:crts2333.o%s} \
2414 %{mmcu=at90s2343:crts2343.o%s} \
2415 %{mmcu=attiny22:crttn22.o%s} \
2416 %{mmcu=attiny26:crttn26.o%s} \
2417 %{mmcu=at90s4433:crts4433.o%s} \
2418 %{mmcu=at90s4414:crts4414.o%s} \
2419 %{mmcu=at90s4434:crts4434.o%s} \
2420 %{mmcu=at90c8534:crtc8534.o%s} \
2421 %{mmcu=at90s8535:crts8535.o%s} \
2422 %{mmcu=at86rf401:crt86401.o%s} \
2423 %{mmcu=atmega103|mmcu=avr3:crtm103.o%s} \
2424 %{mmcu=atmega603:crtm603.o%s} \
2425 %{mmcu=at43usb320:crt43320.o%s} \
2426 %{mmcu=at43usb355:crt43355.o%s} \
2427 %{mmcu=at76c711:crt76711.o%s} \
2428 %{mmcu=atmega8|mmcu=avr4:crtm8.o%s} \
2429 %{mmcu=atmega8515:crtm8515.o%s} \
2430 %{mmcu=atmega8535:crtm8535.o%s} \
2431 %{mmcu=atmega16:crtm16.o%s} \
2432 %{mmcu=atmega161|mmcu=avr5:crtm161.o%s} \
2433 %{mmcu=atmega162:crtm162.o%s} \
2434 %{mmcu=atmega163:crtm163.o%s} \
2435 %{mmcu=atmega169:crtm169.o%s} \
2436 %{mmcu=atmega32:crtm32.o%s} \
2437 %{mmcu=atmega323:crtm323.o%s} \
2438 %{mmcu=atmega64:crtm64.o%s} \
2439 %{mmcu=atmega128:crtm128.o%s} \
2440 %{mmcu=at94k:crtat94k.o%s}"
2442 #define EXTRA_SPECS {"crt_binutils", CRT_BINUTILS_SPECS},
2444 /* Define this macro to provide additional specifications to put in
2445 the `specs' file that can be used in various specifications like
2448 /* This is the default without any -mmcu=* option (AT90S*). */
2449 #define MULTILIB_DEFAULTS { "mmcu=avr2" }
2451 /* This is undefined macro for collect2 disabling */
2452 #define LINKER_NAME "ld"
2454 #define TEST_HARD_REG_CLASS(CLASS, REGNO) \
2455 TEST_HARD_REG_BIT (reg_class_contents[ (int) (CLASS)], REGNO)
2457 /* Note that the other files fail to use these
2458 in some of the places where they should. */
2460 #if defined(__STDC__) || defined(ALMOST_STDC)
2461 #define AS2(a,b,c) #a " " #b "," #c
2462 #define AS2C(b,c) " " #b "," #c
2463 #define AS3(a,b,c,d) #a " " #b "," #c "," #d
2464 #define AS1(a,b) #a " " #b
2466 #define AS1(a,b) "a b"
2467 #define AS2(a,b,c) "a b,c"
2468 #define AS2C(b,c) " b,c"
2469 #define AS3(a,b,c,d) "a b,c,d"
2471 #define OUT_AS1(a,b) output_asm_insn (AS1(a,b), operands)
2472 #define OUT_AS2(a,b,c) output_asm_insn (AS2(a,b,c), operands)
2473 #define CR_TAB "\n\t"
2475 /* Temporary register r0 */
2478 /* zero register r1 */
2479 #define ZERO_REGNO 1
2481 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
projects / platform / upstream / gcc.git / blob