1 /* Definitions of target machine for Visium.
2 Copyright (C) 2002-2017 Free Software Foundation, Inc.
3 Contributed by C.Nettleton, J.P.Parkes and P.Garbett.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published
9 by the Free Software Foundation; either version 3, or (at your
10 option) any later version.
12 GCC is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
22 /* Controlling the Compilation Driver, `gcc' */
24 /* Pass -mtune=* options to the assembler */
26 #define ASM_SPEC "%{mcpu=gr6:-mtune=gr6; :-mtune=mcm}"
28 /* Define symbols for the preprocessor. */
29 #define CPP_SPEC "%{mcpu=gr6:-D__gr6__; :-D__gr5__}"
31 /* Targets of a link */
33 "--start-group -lc %{msim:-lsim; mdebug:-ldebug; :-lserial} --end-group"
35 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
36 #define STARTFILE_SPEC "crti.o%s crtbegin.o%s crt0.o%s"
38 /* Run-time Target Specification */
40 /* TARGET_CPU_CPP_BUILTINS() This function-like macro expands to a
41 block of code that defines built-in preprocessor macros and
42 assertions for the target cpu, using the functions builtin_define,
43 builtin_define_std and builtin_assert. When the front end calls
44 this macro it provides a trailing semicolon, and since it has
45 finished command line option processing your code can use those
46 results freely. builtin_assert takes a string in the form you pass
47 to the command-line option -A, such as cpu=mips, and creates the
48 assertion. builtin_define takes a string in the form accepted by
49 option -D and unconditionally defines the macro.
51 builtin_define_std takes a string representing the name of an
52 object-like macro. If it doesn't lie in the user's namespace,
53 builtin_define_std defines it unconditionally. Otherwise, it
54 defines a version with two leading underscores, and another version
55 with two leading and trailing underscores, and defines the original
56 only if an ISO standard was not requested on the command line. For
57 example, passing unix defines __unix, __unix__ and possibly unix;
58 passing _mips defines __mips, __mips__ and possibly _mips, and
59 passing _ABI64 defines only _ABI64.
61 You can also test for the C dialect being compiled. The variable
62 c_language is set to one of clk_c, clk_cplusplus or
63 clk_objective_c. Note that if we are preprocessing assembler, this
64 variable will be clk_c but the function-like macro
65 preprocessing_asm_p() will return true, so you might want to check
66 for that first. If you need to check for strict ANSI, the variable
67 flag_iso can be used. The function-like macro
68 preprocessing_trad_p() can be used to check for traditional
70 #define TARGET_CPU_CPP_BUILTINS() \
73 builtin_define ("__VISIUM__"); \
75 builtin_define ("__VISIUM_ARCH_MCM__"); \
77 builtin_define ("__VISIUM_ARCH_BMI__"); \
78 if (TARGET_FPU_IEEE) \
79 builtin_define ("__VISIUM_ARCH_FPU_IEEE__"); \
83 /* Recast the cpu class to be the cpu attribute.
84 Every file includes us, but not every file includes insn-attr.h. */
85 #define visium_cpu_attr ((enum attr_cpu) visium_cpu)
87 /* Defining data structures for per-function information.
89 If the target needs to store information on a per-function basis,
90 GCC provides a macro and a couple of variables to allow this. Note,
91 just using statics to store the information is a bad idea, since
92 GCC supports nested functions, so you can be halfway through
93 encoding one function when another one comes along.
95 GCC defines a data structure called struct function which contains
96 all of the data specific to an individual function. This structure
97 contains a field called machine whose type is struct
98 machine_function *, which can be used by targets to point to their
101 If a target needs per-function specific data it should define the
102 type struct machine_function and also the macro
103 INIT_EXPANDERS. This macro should be used to initialize the
104 function pointer init_machine_status. This pointer is explained
107 One typical use of per-function, target specific data is to create
108 an RTX to hold the register containing the function's return
109 address. This RTX can then be used to implement the
110 __builtin_return_address function, for level 0.
112 Note--earlier implementations of GCC used a single data area to
113 hold all of the per-function information. Thus when processing of a
114 nested function began the old per-function data had to be pushed
115 onto a stack, and when the processing was finished, it had to be
116 popped off the stack. GCC used to provide function pointers called
117 save_machine_status and restore_machine_status to handle the saving
118 and restoring of the target specific information. Since the single
119 data area approach is no longer used, these pointers are no longer
122 The macro and function pointers are described below.
126 Macro called to initialize any target specific information. This
127 macro is called once per function, before generation of any RTL has
128 begun. The intention of this macro is to allow the initialization
129 of the function pointers below.
132 This is a void (*)(struct function *) function pointer. If this
133 pointer is non-NULL it will be called once per function, before
134 function compilation starts, in order to allow the target to
135 perform any target specific initialization of the struct function
136 structure. It is intended that this would be used to initialize the
137 machine of that structure. struct machine_function structures are
138 expected to be freed by GC. Generally, any memory that they
139 reference must be allocated by using ggc_alloc, including the
142 #define INIT_EXPANDERS visium_init_expanders ()
146 Note that the definitions of the macros in this table which are
147 sizes or alignments measured in bits do not need to be constant.
148 They can be C expressions that refer to static variables, such as
153 Define this macro to have the value 1 if the most significant bit
154 in a byte has the lowest number; otherwise define it to have the
155 value zero. This means that bit-field instructions count from the
156 most significant bit. If the machine has no bit-field
157 instructions, then this must still be defined, but it doesn't
158 matter which value it is defined to. This macro need not be a
161 This macro does not affect the way structure fields are packed into
162 bytes or words; that is controlled by `BYTES_BIG_ENDIAN'. */
163 #define BITS_BIG_ENDIAN 1
165 /* `BYTES_BIG_ENDIAN'
167 Define this macro to have the value 1 if the most significant byte
168 in a word has the lowest number. This macro need not be a
170 #define BYTES_BIG_ENDIAN 1
172 /* `WORDS_BIG_ENDIAN'
174 Define this macro to have the value 1 if, in a multiword object,
175 the most significant word has the lowest number. This applies to
176 both memory locations and registers; GNU CC fundamentally assumes
177 that the order of words in memory is the same as the order in
178 registers. This macro need not be a constant. */
179 #define WORDS_BIG_ENDIAN 1
183 Number of bits in a word; normally 32. */
184 #define BITS_PER_WORD 32
188 Number of storage units in a word; normally 4. */
189 #define UNITS_PER_WORD 4
193 Width of a pointer, in bits. You must specify a value no wider
194 than the width of `Pmode'. If it is not equal to the width of
195 `Pmode', you must define `POINTERS_EXTEND_UNSIGNED'. */
196 #define POINTER_SIZE 32
200 Normal alignment required for function parameters on the stack, in
201 bits. All stack parameters receive at least this much alignment
202 regardless of data type. On most machines, this is the same as the
203 size of an integer. */
204 #define PARM_BOUNDARY 32
208 Define this macro if you wish to preserve a certain alignment for
209 the stack pointer. The definition is a C expression for the
210 desired alignment (measured in bits).
212 If `PUSH_ROUNDING' is not defined, the stack will always be aligned
213 to the specified boundary. If `PUSH_ROUNDING' is defined and
214 specifies a less strict alignment than `STACK_BOUNDARY', the stack
215 may be momentarily unaligned while pushing arguments. */
216 #define STACK_BOUNDARY 32
218 #define VISIUM_STACK_ALIGN(LOC) (((LOC) + 3) & ~3)
220 /* `FUNCTION_BOUNDARY'
222 Alignment required for a function entry point, in bits. */
223 #define FUNCTION_BOUNDARY 32
225 /* `BIGGEST_ALIGNMENT'
227 Biggest alignment that any data type can require on this machine,
229 #define BIGGEST_ALIGNMENT 32
231 /* `DATA_ALIGNMENT (TYPE, BASIC-ALIGN)`
233 If defined, a C expression to compute the alignment for a variable
234 in the static store. TYPE is the data type, and BASIC-ALIGN is
235 the alignment that the object would ordinarily have. The value of
236 this macro is used instead of that alignment to align the object. */
237 #define DATA_ALIGNMENT(TYPE,ALIGN) visium_data_alignment (TYPE, ALIGN)
239 /* `LOCAL_ALIGNMENT (TYPE, BASIC-ALIGN)`
241 If defined, a C expression to compute the alignment for a variable
242 in the local store. TYPE is the data type, and BASIC-ALIGN is the
243 alignment that the object would ordinarily have. The value of this
244 macro is used instead of that alignment to align the object. */
245 #define LOCAL_ALIGNMENT(TYPE,ALIGN) visium_data_alignment (TYPE, ALIGN)
247 /* `EMPTY_FIELD_BOUNDARY'
249 Alignment in bits to be given to a structure bit field that follows
250 an empty field such as `int : 0;'.
252 Note that `PCC_BITFIELD_TYPE_MATTERS' also affects the alignment
253 that results from an empty field. */
254 #define EMPTY_FIELD_BOUNDARY 32
256 /* `STRICT_ALIGNMENT'
258 Define this macro to be the value 1 if instructions will fail to
259 work if given data not on the nominal alignment. If instructions
260 will merely go slower in that case, define this macro as 0. */
261 #define STRICT_ALIGNMENT 1
263 /* `TARGET_FLOAT_FORMAT'
265 A code distinguishing the floating point format of the target
266 machine. There are three defined values:
269 This code indicates IEEE floating point. It is the default;
270 there is no need to define this macro when the format is IEEE.
273 This code indicates the peculiar format used on the Vax.
275 `UNKNOWN_FLOAT_FORMAT'
276 This code indicates any other format.
278 The value of this macro is compared with `HOST_FLOAT_FORMAT' to
279 determine whether the target machine has the same format as the
280 host machine. If any other formats are actually in use on
281 supported machines, new codes should be defined for them.
283 The ordering of the component words of floating point values
284 stored in memory is controlled by `FLOAT_WORDS_BIG_ENDIAN' for the
285 target machine and `HOST_FLOAT_WORDS_BIG_ENDIAN' for the host. */
286 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
287 #define UNITS_PER_HWFPVALUE 4
289 /* Layout of Source Language Data Types
291 These macros define the sizes and other characteristics of the
292 standard basic data types used in programs being compiled. Unlike
293 the macros in the previous section, these apply to specific
294 features of C and related languages, rather than to fundamental
295 aspects of storage layout. */
299 A C expression for the size in bits of the type `int' on the target
300 machine. If you don't define this, the default is one word. */
301 #define INT_TYPE_SIZE 32
305 A C expression for the size in bits of the type `short' on the
306 target machine. If you don't define this, the default is half a
307 word. (If this would be less than one storage unit, it is rounded
309 #define SHORT_TYPE_SIZE 16
313 A C expression for the size in bits of the type `long' on the
314 target machine. If you don't define this, the default is one word. */
315 #define LONG_TYPE_SIZE 32
317 /* `LONG_LONG_TYPE_SIZE'
319 A C expression for the size in bits of the type `long long' on the
320 target machine. If you don't define this, the default is two
321 words. If you want to support GNU Ada on your machine, the value
322 of macro must be at least 64. */
323 #define LONG_LONG_TYPE_SIZE 64
327 A C expression for the size in bits of the type `char' on the
328 target machine. If you don't define this, the default is one
329 quarter of a word. (If this would be less than one storage unit,
330 it is rounded up to one unit.) */
331 #define CHAR_TYPE_SIZE 8
335 A C expression for the size in bits of the type `float' on the
336 target machine. If you don't define this, the default is one word. */
337 #define FLOAT_TYPE_SIZE 32
339 /* `DOUBLE_TYPE_SIZE'
341 A C expression for the size in bits of the type `double' on the
342 target machine. If you don't define this, the default is two
344 #define DOUBLE_TYPE_SIZE 64
346 /* `LONG_DOUBLE_TYPE_SIZE'
348 A C expression for the size in bits of the type `long double' on
349 the target machine. If you don't define this, the default is two
351 #define LONG_DOUBLE_TYPE_SIZE DOUBLE_TYPE_SIZE
353 /* `WIDEST_HARDWARE_FP_SIZE'
355 A C expression for the size in bits of the widest floating-point
356 format supported by the hardware. If you define this macro, you
357 must specify a value less than or equal to the value of
358 `LONG_DOUBLE_TYPE_SIZE'. If you do not define this macro, the
359 value of `LONG_DOUBLE_TYPE_SIZE' is the default. */
361 /* `DEFAULT_SIGNED_CHAR'
363 An expression whose value is 1 or 0, according to whether the type
364 `char' should be signed or unsigned by default. The user can
365 always override this default with the options `-fsigned-char' and
366 `-funsigned-char'. */
367 #define DEFAULT_SIGNED_CHAR 0
371 A C expression for a string describing the name of the data type to
372 use for size values. The typedef name `size_t' is defined using
373 the contents of the string.
375 The string can contain more than one keyword. If so, separate them
376 with spaces, and write first any length keyword, then `unsigned' if
377 appropriate, and finally `int'. The string must exactly match one
378 of the data type names defined in the function
379 `init_decl_processing' in the file `c-decl.c'. You may not omit
380 `int' or change the order--that would cause the compiler to crash
383 If you don't define this macro, the default is `"long unsigned
385 #define SIZE_TYPE "unsigned int"
389 A C expression for a string describing the name of the data type to
390 use for the result of subtracting two pointers. The typedef name
391 `ptrdiff_t' is defined using the contents of the string. See
392 `SIZE_TYPE' above for more information.
394 If you don't define this macro, the default is `"long int"'. */
395 #define PTRDIFF_TYPE "long int"
397 /* Newlib uses the unsigned type corresponding to ptrdiff_t for
398 uintptr_t; this is the same as size_t for most newlib-using
399 targets, but not for us. */
400 #define UINTPTR_TYPE "long unsigned int"
404 A C expression for a string describing the name of the data type to
405 use for wide characters. The typedef name `wchar_t' is defined
406 using the contents of the string. See `SIZE_TYPE' above for more
409 If you don't define this macro, the default is `"int"'. */
410 #define WCHAR_TYPE "short int"
414 A C expression for the size in bits of the data type for wide
415 characters. This is used in `cpp', which cannot make use of
417 #define WCHAR_TYPE_SIZE 16
421 This section explains how to describe what registers the target
422 machine has, and how (in general) they can be used. */
424 /* `FIRST_PSEUDO_REGISTER'
426 Number of actual hardware registers.
427 The hardware registers are assigned numbers for the compiler
428 from 0 to just below FIRST_PSEUDO_REGISTER.
429 All registers that the compiler knows about must be given numbers,
430 even those that are not normally considered general registers.
432 Register 51 is used as the argument pointer register.
433 Register 52 is used as the soft frame pointer register. */
434 #define FIRST_PSEUDO_REGISTER 53
436 #define RETURN_REGNUM 1
437 #define PROLOGUE_TMP_REGNUM 9
438 #define LINK_REGNUM 21
439 #define GP_LAST_REGNUM 31
440 #define GP_REGISTER_P(REGNO) \
441 (((unsigned) (REGNO)) <= GP_LAST_REGNUM)
443 #define MDB_REGNUM 32
444 #define MDC_REGNUM 33
446 #define FP_FIRST_REGNUM 34
447 #define FP_LAST_REGNUM 49
448 #define FP_RETURN_REGNUM (FP_FIRST_REGNUM + 1)
449 #define FP_REGISTER_P(REGNO) \
450 (FP_FIRST_REGNUM <= (REGNO) && (REGNO) <= FP_LAST_REGNUM)
452 #define FLAGS_REGNUM 50
456 An initializer that says which registers are used for fixed
457 purposes all throughout the compiled code and are therefore not
458 available for general allocation. These would include the stack
459 pointer, the frame pointer (except on machines where that can be
460 used as a general register when no frame pointer is needed), the
461 program counter on machines where that is considered one of the
462 addressable registers, and any other numbered register with a
465 This information is expressed as a sequence of numbers, separated
466 by commas and surrounded by braces. The Nth number is 1 if
467 register N is fixed, 0 otherwise.
469 The table initialized from this macro, and the table initialized by
470 the following one, may be overridden at run time either
471 automatically, by the actions of the macro
472 `CONDITIONAL_REGISTER_USAGE', or by the user with the command
473 options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'.
475 r0 and f0 are immutable registers hardwired to 0.
476 r21 is the link register used for procedure linkage.
477 r23 is the stack pointer register.
478 r29 and r30 hold the interrupt context.
479 mdc is a read-only register because the writemdc instruction
480 terminates all the operations of the EAM on the GR6. */
481 #define FIXED_REGISTERS \
482 { 1, 0, 0, 0, 0, 0, 0, 0, /* r0 .. r7 */ \
483 0, 0, 0, 0, 0, 0, 0, 0, /* r8 .. r15 */ \
484 0, 0, 0, 0, 0, 1, 0, 1, /* r16 .. r23 */ \
485 0, 0, 0, 0, 0, 1, 1, 0, /* r24 .. r31 */ \
486 0, 1, /* mdb, mdc */ \
487 1, 0, 0, 0, 0, 0, 0, 0, /* f0 .. f7 */ \
488 0, 0, 0, 0, 0, 0, 0, 0, /* f8 .. f15 */ \
489 1, 1, 1 } /* flags, arg, frame */
491 /* `CALL_USED_REGISTERS'
493 Like `FIXED_REGISTERS' but has 1 for each register that is
494 clobbered (in general) by function calls as well as for fixed
495 registers. This macro therefore identifies the registers that are
496 not available for general allocation of values that must live
497 across function calls.
499 If a register has 0 in `CALL_USED_REGISTERS', the compiler
500 automatically saves it on function entry and restores it on
501 function exit, if the register is used within the function. */
502 #define CALL_USED_REGISTERS \
503 { 1, 1, 1, 1, 1, 1, 1, 1, /* r0 .. r7 */ \
504 1, 1, 1, 0, 0, 0, 0, 0, /* r8 .. r15 */ \
505 0, 0, 0, 0, 1, 1, 0, 1, /* r16 .. r23 */ \
506 1, 1, 1, 1, 1, 1, 1, 1, /* r24 .. r31 */ \
507 1, 1, /* mdb, mdc */ \
508 1, 1, 1, 1, 1, 1, 1, 1, /* f0 .. f7 */ \
509 1, 0, 0, 0, 0, 0, 0, 0, /* f8 .. f15 */ \
510 1, 1, 1 } /* flags, arg, frame */
512 /* Like `CALL_USED_REGISTERS' except this macro doesn't require that
513 the entire set of `FIXED_REGISTERS' be included.
514 (`CALL_USED_REGISTERS' must be a superset of `FIXED_REGISTERS').
515 This macro is optional. If not specified, it defaults to the value
516 of `CALL_USED_REGISTERS'. */
517 #define CALL_REALLY_USED_REGISTERS \
518 { 0, 1, 1, 1, 1, 1, 1, 1, /* r0 .. r7 */ \
519 1, 1, 1, 0, 0, 0, 0, 0, /* r8 .. r15 */ \
520 0, 0, 0, 0, 1, 0, 0, 0, /* r16 .. r23 */ \
521 1, 1, 1, 1, 1, 0, 0, 1, /* r24 .. r31 */ \
522 1, 1, /* mdb, mdc */ \
523 1, 1, 1, 1, 1, 1, 1, 1, /* f0 .. f7 */ \
524 1, 0, 0, 0, 0, 0, 0, 0, /* f8 .. f15 */ \
525 1, 0, 0 } /* flags, arg, frame */
529 If defined, an initializer for a vector of integers, containing the
530 numbers of hard registers in the order in which GCC should prefer
531 to use them (from most preferred to least).
533 If this macro is not defined, registers are used lowest numbered
534 first (all else being equal). */
535 #define REG_ALLOC_ORDER \
536 { 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, /* r10 .. r1 */ \
537 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, /* r11 .. r20 */ \
539 24, 25, 26, 27, 28, /* r24 .. r28 */ \
541 32, 33, /* mdb, mdc */ \
542 42, 41, 40, 39, 38, 37, 36, 35, /* f8 .. f1 */ \
543 43, 44, 45, 46, 47, 48, 49, /* f9 .. f15 */ \
544 21, 23, /* lr, sp */ \
545 29, 30, /* r29, r30 */ \
546 50, 51, 52, /* flags, arg, frame */ \
549 /* `HARD_REGNO_RENAME_OK (OLD_REG, NEW_REG)'
551 A C expression which is nonzero if hard register NEW_REG can be
552 considered for use as a rename register for hard register OLD_REG. */
553 #define HARD_REGNO_RENAME_OK(OLD_REG, NEW_REG) \
554 visium_hard_regno_rename_ok (OLD_REG, NEW_REG)
558 On many machines, the numbered registers are not all equivalent.
559 For example, certain registers may not be allowed for indexed
560 addressing; certain registers may not be allowed in some
561 instructions. These machine restrictions are described to the
562 compiler using "register classes".
566 An enumeral type that must be defined with all the register class
567 names as enumeral values. `NO_REGS' must be first. `ALL_REGS'
568 must be the last register class, followed by one more enumeral
569 value, `LIM_REG_CLASSES', which is not a register class but rather
570 tells how many classes there are.
572 Each register class has a number, which is the value of casting the
573 class name to type `int'. The number serves as an index in many of
574 the tables described below. */
595 The number of distinct register classes, defined as follows. */
596 #define N_REG_CLASSES (int) LIM_REG_CLASSES
600 An initializer containing the names of the register classes as C
601 string constants. These names are used in writing some of the
603 #define REG_CLASS_NAMES \
604 {"NO_REGS", "MDB", "MDC", "FP_REGS", "FLAGS", "R1", "R2", "R3", \
605 "SIBCALL_REGS", "LOW_REGS", "GENERAL_REGS", "ALL_REGS"}
607 /* `REG_CLASS_CONTENTS'
609 An initializer containing the contents of the register classes, as
610 integers which are bit masks. The Nth integer specifies the
611 contents of class N. The way the integer MASK is interpreted is
612 that register R is in the class if `MASK & (1 << R)' is 1.
614 When the machine has more than 32 registers, an integer does not
615 suffice. Then the integers are replaced by sub-initializers,
616 braced groupings containing several integers. Each sub-initializer
617 must be suitable as an initializer for the type `HARD_REG_SET'
618 which is defined in `hard-reg-set.h'. */
619 #define REG_CLASS_CONTENTS { \
620 {0x00000000, 0x00000000}, /* NO_REGS */ \
621 {0x00000000, 0x00000001}, /* MDB */ \
622 {0x00000000, 0x00000002}, /* MDC */ \
623 {0x00000000, 0x0003fffc}, /* FP_REGS */ \
624 {0x00000000, 0x00040000}, /* FLAGS */ \
625 {0x00000002, 0x00000000}, /* R1 */ \
626 {0x00000004, 0x00000000}, /* R2 */ \
627 {0x00000008, 0x00000000}, /* R3 */ \
628 {0x000005ff, 0x00000000}, /* SIBCALL_REGS */ \
629 {0x1fffffff, 0x00000000}, /* LOW_REGS */ \
630 {0xffffffff, 0x00180000}, /* GENERAL_REGS */ \
631 {0xffffffff, 0x001fffff}} /* ALL_REGS */
633 /* `REGNO_REG_CLASS (REGNO)'
635 A C expression whose value is a register class containing hard
636 register REGNO. In general there is more than one such class;
637 choose a class which is "minimal", meaning that no smaller class
638 also contains the register. */
639 #define REGNO_REG_CLASS(REGNO) \
640 ((REGNO) == MDB_REGNUM ? MDB : \
641 (REGNO) == MDC_REGNUM ? MDC : \
642 FP_REGISTER_P (REGNO) ? FP_REGS : \
643 (REGNO) == FLAGS_REGNUM ? FLAGS : \
644 (REGNO) == 1 ? R1 : \
645 (REGNO) == 2 ? R2 : \
646 (REGNO) == 3 ? R3 : \
647 (REGNO) <= 8 || (REGNO) == 10 ? SIBCALL_REGS : \
648 (REGNO) <= 28 ? LOW_REGS : \
653 A macro whose definition is the name of the class to which a valid
654 base register must belong. A base register is one used in an
655 address which is the register value plus a displacement. */
656 #define BASE_REG_CLASS GENERAL_REGS
658 #define BASE_REGISTER_P(REGNO) \
659 (GP_REGISTER_P (REGNO) \
660 || (REGNO) == ARG_POINTER_REGNUM \
661 || (REGNO) == FRAME_POINTER_REGNUM)
665 A macro whose definition is the name of the class to which a valid
666 index register must belong. An index register is one used in an
667 address where its value is either multiplied by a scale factor or
668 added to another register (as well as added to a displacement). */
669 #define INDEX_REG_CLASS NO_REGS
671 /* `REGNO_OK_FOR_BASE_P (NUM)'
673 A C expression which is nonzero if register number NUM is suitable
674 for use as a base register in operand addresses. It may be either
675 a suitable hard register or a pseudo register that has been
676 allocated such a hard register. */
677 #define REGNO_OK_FOR_BASE_P(REGNO) \
678 (BASE_REGISTER_P (REGNO) || BASE_REGISTER_P ((unsigned)reg_renumber[REGNO]))
680 /* `REGNO_OK_FOR_INDEX_P (NUM)'
682 A C expression which is nonzero if register number NUM is suitable
683 for use as an index register in operand addresses. It may be
684 either a suitable hard register or a pseudo register that has been
685 allocated such a hard register.
687 The difference between an index register and a base register is
688 that the index register may be scaled. If an address involves the
689 sum of two registers, neither one of them scaled, then either one
690 may be labeled the "base" and the other the "index"; but whichever
691 labeling is used must fit the machine's constraints of which
692 registers may serve in each capacity. The compiler will try both
693 labelings, looking for one that is valid, and will reload one or
694 both registers only if neither labeling works. */
695 #define REGNO_OK_FOR_INDEX_P(REGNO) 0
697 /* `PREFERRED_RELOAD_CLASS (X, CLASS)'
699 A C expression that places additional restrictions on the register
700 class to use when it is necessary to copy value X into a register
701 in class CLASS. The value is a register class; perhaps CLASS, or
702 perhaps another, smaller class.
704 Sometimes returning a more restrictive class makes better code.
705 For example, on the 68000, when X is an integer constant that is in
706 range for a `moveq' instruction, the value of this macro is always
707 `DATA_REGS' as long as CLASS includes the data registers.
708 Requiring a data register guarantees that a `moveq' will be used.
710 If X is a `const_double', by returning `NO_REGS' you can force X
711 into a memory constant. This is useful on certain machines where
712 immediate floating values cannot be loaded into certain kinds of
714 #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS
716 #define CLASS_MAX_NREGS(CLASS, MODE) \
718 ((GET_MODE_SIZE (MODE) + 2 * UNITS_PER_WORD - 1) / (2 * UNITS_PER_WORD)) \
719 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
721 /* Stack Layout and Calling Conventions
725 `STACK_GROWS_DOWNWARD'
726 Define this macro if pushing a word onto the stack moves the stack
727 pointer to a smaller address. */
728 #define STACK_GROWS_DOWNWARD 1
730 /* `FIRST_PARM_OFFSET (FUNDECL)'
732 Offset from the argument pointer register to the first argument's
733 address. On some machines it may depend on the data type of the
736 If `ARGS_GROW_DOWNWARD', this is the offset to the location above
737 the first argument's address. */
738 #define FIRST_PARM_OFFSET(FNDECL) 0
740 /* `DYNAMIC_CHAIN_ADDRESS (FRAMEADDR)'
742 A C expression whose value is RTL representing the address in a
743 stack frame where the pointer to the caller's frame is stored.
744 Assume that FRAMEADDR is an RTL expression for the address of the
747 If you don't define this macro, the default is to return the value
748 of FRAMEADDR--that is, the stack frame address is also the address
749 of the stack word that points to the previous frame. */
750 #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) \
751 visium_dynamic_chain_address (FRAMEADDR)
753 /* `RETURN_ADDR_RTX (COUNT, FRAMEADDR)'
755 A C expression whose value is RTL representing the value of the
756 return address for the frame COUNT steps up from the current frame,
757 after the prologue. FRAMEADDR is the frame pointer of the COUNT
758 frame, or the frame pointer of the COUNT - 1 frame if
759 `RETURN_ADDR_IN_PREVIOUS_FRAME' is defined.
761 The value of the expression must always be the correct address when
762 COUNT is zero, but may be `NULL_RTX' if there is not way to
763 determine the return address of other frames. */
764 #define RETURN_ADDR_RTX(COUNT,FRAMEADDR) \
765 visium_return_addr_rtx (COUNT, FRAMEADDR)
767 /* Exception Handling
769 `EH_RETURN_DATA_REGNO'
771 A C expression whose value is the Nth register number used for data
772 by exception handlers or INVALID_REGNUM if fewer than N registers
775 The exception handling library routines communicate with the
776 exception handlers via a set of agreed upon registers. */
777 #define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N) + 11 : INVALID_REGNUM)
778 #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (SImode, 8)
779 #define EH_RETURN_HANDLER_RTX visium_eh_return_handler_rtx ()
781 /* Registers That Address the Stack Frame
783 This discusses registers that address the stack frame.
785 `STACK_POINTER_REGNUM'
787 The register number of the stack pointer register, which must also
788 be a fixed register according to `FIXED_REGISTERS'. On most
789 machines, the hardware determines which register this is. */
790 #define STACK_POINTER_REGNUM 23
792 /* `FRAME_POINTER_REGNUM'
794 The register number of the frame pointer register, which is used to
795 access automatic variables in the stack frame. On some machines,
796 the hardware determines which register this is. On other machines,
797 you can choose any register you wish for this purpose. */
798 #define FRAME_POINTER_REGNUM 52
800 /* `HARD_FRAME_POINTER_REGNUM'
802 On some machines the offset between the frame pointer and starting
803 offset of the automatic variables is not known until after register
804 allocation has been done (for example, because the saved registers
805 are between these two locations). On those machines, define
806 `FRAME_POINTER_REGNUM' the number of a special, fixed register to
807 be used internally until the offset is known, and define
808 `HARD_FRAME_POINTER_REGNUM' to be the actual hard register number
809 used for the frame pointer. */
810 #define HARD_FRAME_POINTER_REGNUM 22
812 /* `ARG_POINTER_REGNUM'
814 The register number of the arg pointer register, which is used to
815 access the function's argument list. On some machines, this is the
816 same as the frame pointer register. On some machines, the hardware
817 determines which register this is. On other machines, you can
818 choose any register you wish for this purpose. If this is not the
819 same register as the frame pointer register, then you must mark it
820 as a fixed register according to `FIXED_REGISTERS', or arrange to
821 be able to eliminate it (*note Elimination::.). */
822 #define ARG_POINTER_REGNUM 51
824 /* `STATIC_CHAIN_REGNUM'
825 `STATIC_CHAIN_INCOMING_REGNUM'
827 Register numbers used for passing a function's static chain
828 pointer. If register windows are used, the register number as seen
829 by the called function is `STATIC_CHAIN_INCOMING_REGNUM', while the
830 register number as seen by the calling function is
831 `STATIC_CHAIN_REGNUM'. If these registers are the same,
832 `STATIC_CHAIN_INCOMING_REGNUM' need not be defined.
834 The static chain register need not be a fixed register.
836 If the static chain is passed in memory, these macros should not be
837 defined; instead, the next two macros should be defined. */
838 #define STATIC_CHAIN_REGNUM 20
842 If defined, this macro specifies a table of register pairs used to
843 eliminate unneeded registers that point into the stack frame. If
844 it is not defined, the only elimination attempted by the compiler
845 is to replace references to the frame pointer with references to
848 The definition of this macro is a list of structure
849 initializations, each of which specifies an original and
850 replacement register.
852 On some machines, the position of the argument pointer is not known
853 until the compilation is completed. In such a case, a separate
854 hard register must be used for the argument pointer. This register
855 can be eliminated by replacing it with either the frame pointer or
856 the argument pointer, depending on whether or not the frame pointer
859 Note that the elimination of the argument pointer with the stack
860 pointer is specified first since that is the preferred elimination. */
861 #define ELIMINABLE_REGS \
862 {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
863 { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \
864 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
865 { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}}
867 /* `INITIAL_ELIMINATION_OFFSET (FROM-REG, TO-REG, OFFSET-VAR)'
869 This macro returns the initial difference between the specified pair
871 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
872 (OFFSET = visium_initial_elimination_offset (FROM, TO))
874 /* Passing Function Arguments on the Stack
876 The macros in this section control how arguments are passed on the
877 stack. See the following section for other macros that control
878 passing certain arguments in registers.
880 Passing Arguments in Registers
882 This section describes the macros which let you control how various
883 types of arguments are passed in registers or how they are arranged
886 Define the general purpose, and floating point registers used for
888 #define MAX_ARGS_IN_GP_REGISTERS 8
889 #define GP_ARG_FIRST 1
890 #define GP_ARG_LAST (GP_ARG_FIRST + MAX_ARGS_IN_GP_REGISTERS - 1)
891 #define MAX_ARGS_IN_FP_REGISTERS 8
892 #define FP_ARG_FIRST (FP_FIRST_REGNUM + 1)
893 #define FP_ARG_LAST (FP_ARG_FIRST + MAX_ARGS_IN_FP_REGISTERS - 1)
895 /* Define a data type for recording info about an argument list during the
896 processing of that argument list. */
900 /* The count of general registers used */
902 /* The count of floating registers used */
904 /* The number of stack words used by named arguments */
910 A C type for declaring a variable that is used as the first
911 argument of `FUNCTION_ARG' and other related values. For some
912 target machines, the type `int' suffices and can hold the number of
913 bytes of argument so far.
915 There is no need to record in `CUMULATIVE_ARGS' anything about the
916 arguments that have been passed on the stack. The compiler has
917 other variables to keep track of that. For target machines on
918 which all arguments are passed on the stack, there is no need to
919 store anything in `CUMULATIVE_ARGS'; however, the data structure
920 must exist and should not be empty, so use `int'. */
921 #define CUMULATIVE_ARGS struct visium_args
923 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,FNDECL,N_NAMED_ARGS) \
927 (CUM).stack_words = 0; \
930 /* `FUNCTION_ARG_REGNO_P (REGNO)'
932 A C expression that is nonzero if REGNO is the number of a hard
933 register in which function arguments are sometimes passed. This
934 does *not* include implicit arguments such as the static chain and
935 the structure-value address. On many machines, no registers can be
936 used for this purpose since all function arguments are pushed on
938 #define FUNCTION_ARG_REGNO_P(N) \
939 ((GP_ARG_FIRST <= (N) && (N) <= GP_ARG_LAST) \
940 || (TARGET_FPU && FP_ARG_FIRST <= (N) && (N) <= FP_ARG_LAST))
942 /* `FUNCTION_VALUE_REGNO_P (REGNO)'
944 A C expression that is nonzero if REGNO is the number of a hard
945 register in which the values of called function may come back.
947 A register whose use for returning values is limited to serving as
948 the second of a pair (for a value of type `double', say) need not
949 be recognized by this macro. If the machine has register windows,
950 so that the caller and the called function use different registers
951 for the return value, this macro should recognize only the caller's
953 #define FUNCTION_VALUE_REGNO_P(N) \
954 ((N) == RETURN_REGNUM || (TARGET_FPU && (N) == FP_RETURN_REGNUM))
956 /* How Large Values Are Returned
958 When a function value's mode is `BLKmode' (and in some other
959 cases), the value is not returned according to `FUNCTION_VALUE'.
960 Instead, the caller passes the address of a block of memory in
961 which the value should be stored. This address is called the
962 "structure value address".
964 This section describes how to control returning structure values in
967 `DEFAULT_PCC_STRUCT_RETURN'
969 Define this macro to be 1 if all structure and union return values
970 must be in memory. Since this results in slower code, this should
971 be defined only if needed for compatibility with other compilers or
972 with an ABI. If you define this macro to be 0, then the
973 conventions used for structure and union return values are decided
974 by the `RETURN_IN_MEMORY' macro.
976 If not defined, this defaults to the value 1. */
977 #define DEFAULT_PCC_STRUCT_RETURN 0
979 /* Caller-Saves Register Allocation
981 If you enable it, GNU CC can save registers around function calls.
982 This makes it possible to use call-clobbered registers to hold
983 variables that must live across calls.
985 Function Entry and Exit
987 This section describes the macros that output function entry
988 ("prologue") and exit ("epilogue") code.
992 Define this macro as a C expression that is nonzero if the return
993 instruction or the function epilogue ignores the value of the stack
994 pointer; in other words, if it is safe to delete an instruction to
995 adjust the stack pointer before a return from the function.
997 Note that this macro's value is relevant only for functions for
998 which frame pointers are maintained. It is never safe to delete a
999 final stack adjustment in a function that has no frame pointer, and
1000 the compiler knows this regardless of `EXIT_IGNORE_STACK'. */
1001 #define EXIT_IGNORE_STACK 1
1003 /* `EPILOGUE_USES (REGNO)'
1005 Define this macro as a C expression that is nonzero for registers
1006 are used by the epilogue or the `return' pattern. The stack and
1007 frame pointer registers are already be assumed to be used as
1009 #define EPILOGUE_USES(REGNO) visium_epilogue_uses (REGNO)
1011 /* Generating Code for Profiling
1013 These macros will help you generate code for profiling. */
1015 #define PROFILE_HOOK(LABEL) visium_profile_hook ()
1016 #define FUNCTION_PROFILER(FILE, LABELNO) do {} while (0)
1017 #define NO_PROFILE_COUNTERS 1
1019 /* Trampolines for Nested Functions
1021 A trampoline is a small piece of code that is created at run time
1022 when the address of a nested function is taken. It normally resides
1023 on the stack, in the stack frame of the containing function. These
1024 macros tell GCC how to generate code to allocate and initialize a
1027 The instructions in the trampoline must do two things: load a
1028 constant address into the static chain register, and jump to the
1029 real address of the nested function. On CISC machines such as the
1030 m68k, this requires two instructions, a move immediate and a
1031 jump. Then the two addresses exist in the trampoline as word-long
1032 immediate operands. On RISC machines, it is often necessary to load
1033 each address into a register in two parts. Then pieces of each
1034 address form separate immediate operands.
1036 The code generated to initialize the trampoline must store the
1037 variable parts--the static chain value and the function
1038 address--into the immediate operands of the instructions. On a CISC
1039 machine, this is simply a matter of copying each address to a
1040 memory reference at the proper offset from the start of the
1041 trampoline. On a RISC machine, it may be necessary to take out
1042 pieces of the address and store them separately.
1044 On the Visium, the trampoline is
1046 moviu r9,%u FUNCTION
1047 movil r9,%l FUNCTION
1052 A difficulty is setting the correct instruction parity at run time.
1056 A C expression for the size in bytes of the trampoline, as an integer. */
1057 #define TRAMPOLINE_SIZE 20
1059 /* Implicit calls to library routines
1061 Avoid calling library routines (sqrtf) just to set `errno' to EDOM */
1062 #define TARGET_EDOM 33
1066 `MAX_REGS_PER_ADDRESS'
1068 A number, the maximum number of registers that can appear in a
1069 valid memory address. Note that it is up to you to specify a value
1070 equal to the maximum number that `TARGET_LEGITIMATE_ADDRESS_P' would
1072 #define MAX_REGS_PER_ADDRESS 1
1074 /* `LEGITIMIZE_RELOAD_ADDRESS (X, MODE, OPNUM, TYPE, IND_LEVELS, WIN)'
1076 A C compound statement that attempts to replace X, which is an
1077 address that needs reloading, with a valid memory address for an
1078 operand of mode MODE. WIN will be a C statement label elsewhere
1079 in the code. It is not necessary to define this macro, but it
1080 might be useful for performance reasons. */
1081 #define LEGITIMIZE_RELOAD_ADDRESS(AD, MODE, OPNUM, TYPE, IND, WIN) \
1084 rtx new_x = visium_legitimize_reload_address ((AD), (MODE), (OPNUM), \
1085 (int) (TYPE), (IND)); \
1093 /* Given a comparison code (EQ, NE, etc.) and the operands of a COMPARE,
1094 return the mode to be used for the comparison. */
1095 #define SELECT_CC_MODE(OP,X,Y) visium_select_cc_mode ((OP), (X), (Y))
1097 /* Return nonzero if MODE implies a floating point inequality can be
1098 reversed. For Visium this is always true because we have a full
1099 compliment of ordered and unordered comparisons, but until generic
1100 code knows how to reverse it correctly we keep the old definition. */
1101 #define REVERSIBLE_CC_MODE(MODE) ((MODE) != CCFPEmode && (MODE) != CCFPmode)
1105 A C expression for the cost of a branch instruction. A value of 1
1106 is the default; other values are interpreted relative to that. */
1107 #define BRANCH_COST(A,B) 10
1109 /* Override BRANCH_COST heuristics for complex logical ops. */
1110 #define LOGICAL_OP_NON_SHORT_CIRCUIT 0
1112 /* `SLOW_BYTE_ACCESS'
1114 Define this macro as a C expression which is nonzero if accessing
1115 less than a word of memory (i.e. a `char' or a `short') is no
1116 faster than accessing a word of memory, i.e., if such access
1117 require more than one instruction or if there is no difference in
1118 cost between byte and (aligned) word loads.
1120 When this macro is not defined, the compiler will access a field by
1121 finding the smallest containing object; when it is defined, a
1122 fullword load will be used if alignment permits. Unless bytes
1123 accesses are faster than word accesses, using word accesses is
1124 preferable since it may eliminate subsequent memory access if
1125 subsequent accesses occur to other fields in the same word of the
1126 structure, but to different bytes. */
1127 #define SLOW_BYTE_ACCESS 0
1129 /* `MOVE_RATIO (SPEED)`
1131 The threshold of number of scalar memory-to-memory move insns,
1132 _below_ which a sequence of insns should be generated instead of a
1133 string move insn or a library call. Increasing the value will
1134 always make code faster, but eventually incurs high cost in
1135 increased code size.
1137 Since we have a movmemsi pattern, the default MOVE_RATIO is 2, which
1138 is too low given that movmemsi will invoke a libcall. */
1139 #define MOVE_RATIO(speed) ((speed) ? 9 : 3)
1141 /* `CLEAR_RATIO (SPEED)`
1143 The threshold of number of scalar move insns, _below_ which a
1144 sequence of insns should be generated to clear memory instead of a
1145 string clear insn or a library call. Increasing the value will
1146 always make code faster, but eventually incurs high cost in
1147 increased code size.
1149 Since we have a setmemsi pattern, the default CLEAR_RATIO is 2, which
1150 is too low given that setmemsi will invoke a libcall. */
1151 #define CLEAR_RATIO(speed) ((speed) ? 13 : 5)
1155 The maximum number of bytes that a single instruction can move
1156 quickly between memory and registers or between two memory
1162 The maximum number of bytes that a single instruction can move
1163 quickly between memory and registers or between two memory
1164 locations. If this is undefined, the default is `MOVE_MAX'.
1165 Otherwise, it is the constant value that is the largest value that
1166 `MOVE_MAX' can have at run-time. */
1167 #define MAX_MOVE_MAX 4
1169 /* `SHIFT_COUNT_TRUNCATED'
1171 A C expression that is nonzero if on this machine the number of
1172 bits actually used for the count of a shift operation is equal to
1173 the number of bits needed to represent the size of the object being
1174 shifted. When this macro is non-zero, the compiler will assume
1175 that it is safe to omit a sign-extend, zero-extend, and certain
1176 bitwise `and' instructions that truncates the count of a shift
1177 operation. On machines that have instructions that act on
1178 bitfields at variable positions, which may include `bit test'
1179 instructions, a nonzero `SHIFT_COUNT_TRUNCATED' also enables
1180 deletion of truncations of the values that serve as arguments to
1181 bitfield instructions. */
1182 #define SHIFT_COUNT_TRUNCATED 0
1184 /* `STORE_FLAG_VALUE'
1186 A C expression describing the value returned by a comparison
1187 operator with an integral mode and stored by a store-flag
1188 instruction (`sCOND') when the condition is true. This description
1189 must apply to *all* the `sCOND' patterns and all the comparison
1190 operators whose results have a `MODE_INT' mode. */
1191 #define STORE_FLAG_VALUE 1
1195 An alias for the machine mode for pointers. On most machines,
1196 define this to be the integer mode corresponding to the width of a
1197 hardware pointer; `SImode' on 32-bit machine or `DImode' on 64-bit
1198 machines. On some machines you must define this to be one of the
1199 partial integer modes, such as `PSImode'.
1201 The width of `Pmode' must be at least as large as the value of
1202 `POINTER_SIZE'. If it is not equal, you must define the macro
1203 `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to
1205 #define Pmode SImode
1209 An alias for the machine mode used for memory references to
1210 functions being called, in `call' RTL expressions. On most
1211 machines this should be `QImode'. */
1212 #define FUNCTION_MODE SImode
1214 /* `NO_IMPLICIT_EXTERN_C'
1216 Define this macro if the system header files support C++ as well as
1217 C. This macro inhibits the usual method of using system header
1218 files in C++, which is to pretend that the file's contents are
1219 enclosed in `extern "C" {...}'. */
1220 #define NO_IMPLICIT_EXTERN_C
1222 /* Dividing the Output into Sections (Texts, Data, ...)
1224 An object file is divided into sections containing different types
1225 of data. In the most common case, there are three sections: the
1226 "text section", which holds instructions and read-only data; the
1227 "data section", which holds initialized writable data; and the "bss
1228 section", which holds uninitialized data. Some systems have other
1231 `TEXT_SECTION_ASM_OP'
1233 A C expression whose value is a string containing the assembler
1234 operation that should precede instructions and read-only data.
1235 Normally `".text"' is right. */
1236 #define TEXT_SECTION_ASM_OP "\t.text"
1238 /* `DATA_SECTION_ASM_OP'
1240 A C expression whose value is a string containing the assembler
1241 operation to identify the following data as writable initialized
1242 data. Normally `".data"' is right. */
1243 #define DATA_SECTION_ASM_OP "\t.data"
1245 /* `BSS_SECTION_ASM_OP'
1247 If defined, a C expression whose value is a string containing the
1248 assembler operation to identify the following data as uninitialized
1249 global data. If not defined, and neither `ASM_OUTPUT_BSS' nor
1250 `ASM_OUTPUT_ALIGNED_BSS' are defined, uninitialized global data
1251 will be output in the data section if `-fno-common' is passed,
1252 otherwise `ASM_OUTPUT_COMMON' will be used.
1256 A list of names for sections other than the standard two, which are
1257 `in_text' and `in_data'. You need not define this macro on a
1258 system with no other sections (that GCC needs to use).
1260 `EXTRA_SECTION_FUNCTIONS'
1262 One or more functions to be defined in `varasm.c'. These functions
1263 should do jobs analogous to those of `text_section' and
1264 `data_section', for your additional sections. Do not define this
1265 macro if you do not define `EXTRA_SECTIONS'.
1267 `JUMP_TABLES_IN_TEXT_SECTION' Define this macro if jump tables (for
1268 `tablejump' insns) should be output in the text section, along with
1269 the assembler instructions. Otherwise, the readonly data section
1272 This macro is irrelevant if there is no separate readonly data
1274 #undef JUMP_TABLES_IN_TEXT_SECTION
1277 /* The Overall Framework of an Assembler File
1279 This describes the overall framework of an assembler file.
1283 A C string constant describing how to begin a comment in the target
1284 assembler language. The compiler assumes that the comment will end
1285 at the end of the line. */
1286 #define ASM_COMMENT_START ";"
1290 A C string constant for text to be output before each `asm'
1291 statement or group of consecutive ones. Normally this is `"#APP"',
1292 which is a comment that has no effect on most assemblers but tells
1293 the GNU assembler that it must check the lines that follow for all
1294 valid assembler constructs. */
1295 #define ASM_APP_ON "#APP\n"
1299 A C string constant for text to be output after each `asm'
1300 statement or group of consecutive ones. Normally this is
1301 `"#NO_APP"', which tells the GNU assembler to resume making the
1302 time-saving assumptions that are valid for ordinary compiler
1304 #define ASM_APP_OFF "#NO_APP\n"
1308 This describes data output.
1310 Output and Generation of Labels
1312 This is about outputting labels.
1314 `ASM_OUTPUT_LABEL (STREAM, NAME)'
1316 A C statement (sans semicolon) to output to the stdio stream STREAM
1317 the assembler definition of a label named NAME. Use the expression
1318 `assemble_name (STREAM, NAME)' to output the name itself; before
1319 and after that, output the additional assembler syntax for defining
1320 the name, and a newline. */
1321 #define ASM_OUTPUT_LABEL(STREAM,NAME) \
1322 do { assemble_name (STREAM, NAME); fputs (":\n", STREAM); } while (0)
1324 /* Globalizing directive for a label */
1325 #define GLOBAL_ASM_OP "\t.global "
1327 /* `ASM_OUTPUT_LABELREF (STREAM, NAME)'
1329 A C statement (sans semicolon) to output to the stdio stream STREAM
1330 a reference in assembler syntax to a label named NAME. This should
1331 add `_' to the front of the name, if that is customary on your
1332 operating system, as it is in most Berkeley Unix systems. This
1333 macro is used in `assemble_name'. */
1334 #define ASM_OUTPUT_LABELREF(STREAM,NAME) \
1335 asm_fprintf (STREAM, "%U%s", NAME)
1337 /* Output of Assembler Instructions
1339 This describes assembler instruction output.
1343 A C initializer containing the assembler's names for the machine
1344 registers, each one as a C string constant. This is what
1345 translates register numbers in the compiler into assembler
1347 #define REGISTER_NAMES \
1348 {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
1349 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
1350 "r16", "r17", "r18", "r19", "r20", "r21", "fp", "sp", \
1351 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", \
1353 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
1354 "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
1355 "flags","argp","sfp" }
1357 /* `ADDITIONAL_REGISTER_NAMES`
1359 If defined, a C initializer for an array of structures containing
1360 a name and a register number. This macro defines additional names
1361 for hard registers, thus allowing the `asm' option in declarations
1362 to refer to registers using alternate names. */
1363 #define ADDITIONAL_REGISTER_NAMES \
1364 {{"r22", HARD_FRAME_POINTER_REGNUM}, {"r23", STACK_POINTER_REGNUM}}
1366 /* `REGISTER_PREFIX'
1367 `LOCAL_LABEL_PREFIX'
1371 If defined, C string expressions to be used for the `%R', `%L',
1372 `%U', and `%I' options of `asm_fprintf' (see `final.c'). These are
1373 useful when a single `md' file must support multiple assembler
1374 formats. In that case, the various `tm.h' files can define these
1375 macros differently. */
1376 #define REGISTER_PREFIX ""
1377 #define LOCAL_LABEL_PREFIX "."
1378 #define IMMEDIATE_PREFIX "#"
1380 /* `ASM_OUTPUT_REG_PUSH (STREAM, REGNO)'
1382 A C expression to output to STREAM some assembler code which will
1383 push hard register number REGNO onto the stack. The code need not
1384 be optimal, since this macro is used only when profiling. */
1385 #define ASM_OUTPUT_REG_PUSH(STREAM,REGNO) \
1386 asm_fprintf (STREAM, "\tsubi sp,4\n\twrite.l (sp),%s\n", \
1389 /* `ASM_OUTPUT_REG_POP (STREAM, REGNO)'
1391 A C expression to output to STREAM some assembler code which will
1392 pop hard register number REGNO off of the stack. The code need not
1393 be optimal, since this macro is used only when profiling. */
1394 #define ASM_OUTPUT_REG_POP(STREAM,REGNO) \
1395 asm_fprintf (STREAM, "\tread.l %s,(sp)\n\taddi sp,4\n", \
1399 /* Output of Dispatch Tables
1401 This concerns dispatch tables.
1403 `ASM_OUTPUT_ADDR_DIFF_ELT (STREAM, VALUE, REL)'
1405 A C statement to output to the stdio stream STREAM an assembler
1406 pseudo-instruction to generate a difference between two labels.
1407 VALUE and REL are the numbers of two internal labels. The
1408 definitions of these labels are output using
1409 `ASM_OUTPUT_INTERNAL_LABEL', and they must be printed in the same
1412 You must provide this macro on machines where the addresses in a
1413 dispatch table are relative to the table's own address. If
1414 defined, GNU CC will also use this macro on all machines when
1416 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM,BODY,VALUE,REL) \
1417 switch (GET_MODE (BODY)) \
1420 asm_fprintf ((STREAM), "\t.long\t%LL%d-%LL%d\n", (VALUE),(REL)); \
1423 asm_fprintf ((STREAM), "\t.word\t%LL%d-%LL%d\n", (VALUE),(REL)); \
1426 asm_fprintf ((STREAM), "\t.byte\t%LL%d-%LL%d\n", (VALUE),(REL)); \
1432 /* `ASM_OUTPUT_ADDR_VEC_ELT (STREAM, VALUE)'
1434 This macro should be provided on machines where the addresses in a
1435 dispatch table are absolute.
1437 The definition should be a C statement to output to the stdio
1438 stream STREAM an assembler pseudo-instruction to generate a
1439 reference to a label. VALUE is the number of an internal label
1440 whose definition is output using `ASM_OUTPUT_INTERNAL_LABEL'. */
1441 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
1442 asm_fprintf (STREAM, "\t.long %LL%d\n", VALUE)
1444 /* `ASM_OUTPUT_CASE_END (STREAM, NUM, TABLE)'
1446 Define this if something special must be output at the end of a
1447 jump-table. The definition should be a C statement to be executed
1448 after the assembler code for the table is written. It should write
1449 the appropriate code to stdio stream STREAM. The argument TABLE is
1450 the jump-table insn, and NUM is the label-number of the preceding
1453 If this macro is not defined, nothing special is output at the end
1456 Here we output a word of zero so that jump-tables can be seperated
1457 in reverse assembly. */
1458 #define ASM_OUTPUT_CASE_END(STREAM, NUM, TABLE) \
1459 asm_fprintf (STREAM, "\t.long 0\n")
1461 /* Assembler Commands for Alignment
1463 This describes commands for alignment.
1465 `ASM_OUTPUT_ALIGN_CODE (STREAM)'
1467 A C expression to output text to align the location counter in the
1468 way that is desirable at a point in the code that is reached only
1471 This macro need not be defined if you don't want any special
1472 alignment to be done at such a time. Most machine descriptions do
1473 not currently define the macro. */
1474 #undef ASM_OUTPUT_ALIGN_CODE
1476 /* `ASM_OUTPUT_LOOP_ALIGN (STREAM)'
1478 A C expression to output text to align the location counter in the
1479 way that is desirable at the beginning of a loop.
1481 This macro need not be defined if you don't want any special
1482 alignment to be done at such a time. Most machine descriptions do
1483 not currently define the macro. */
1484 #undef ASM_OUTPUT_LOOP_ALIGN
1486 /* `ASM_OUTPUT_ALIGN (STREAM, POWER)'
1488 A C statement to output to the stdio stream STREAM an assembler
1489 command to advance the location counter to a multiple of 2 to the
1490 POWER bytes. POWER will be a C expression of type `int'. */
1491 #define ASM_OUTPUT_ALIGN(STREAM,LOG) \
1493 fprintf (STREAM, "\t.align %d\n", (1<<(LOG)))
1495 /* `ASM_OUTPUT_MAX_SKIP_ALIGN (STREAM, POWER, MAX_SKIP)`
1497 A C statement to output to the stdio stream STREAM an assembler
1498 command to advance the location counter to a multiple of 2 to the
1499 POWER bytes, but only if MAX_SKIP or fewer bytes are needed to
1500 satisfy the alignment request. POWER and MAX_SKIP will be a C
1501 expression of type `int'. */
1502 #define ASM_OUTPUT_MAX_SKIP_ALIGN(STREAM,LOG,MAX_SKIP) \
1504 if ((MAX_SKIP) == 0) fprintf ((STREAM), "\t.p2align %d\n", (LOG)); \
1506 fprintf ((STREAM), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
1507 /* Make sure that we have at least 8-byte alignment if > 8-byte \
1508 alignment is preferred. */ \
1510 && (1 << (LOG)) > ((MAX_SKIP) + 1) \
1511 && (MAX_SKIP) >= 7) \
1512 fputs ("\t.p2align 3\n", (STREAM)); \
1516 /* Controlling Debugging Information Format
1518 This describes how to specify debugging information.
1520 mda is known to GDB, but not to GCC. */
1521 #define DBX_REGISTER_NUMBER(REGNO) \
1522 ((REGNO) > MDB_REGNUM ? (REGNO) + 1 : (REGNO))
1524 /* `DEBUGGER_AUTO_OFFSET (X)'
1526 A C expression that returns the integer offset value for an
1527 automatic variable having address X (an RTL expression). The
1528 default computation assumes that X is based on the frame-pointer
1529 and gives the offset from the frame-pointer. This is required for
1530 targets that produce debugging output for DBX and allow the frame-pointer
1531 to be eliminated when the `-g' options is used. */
1532 #define DEBUGGER_AUTO_OFFSET(X) \
1533 (GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0)
1535 /* Miscellaneous Parameters
1539 An alias for a machine mode name. This is the machine mode that
1540 elements of a jump-table should have. */
1541 #define CASE_VECTOR_MODE SImode
1543 /* `CASE_VECTOR_PC_RELATIVE'
1544 Define this macro if jump-tables should contain relative addresses. */
1545 #undef CASE_VECTOR_PC_RELATIVE
1547 /* This says how to output assembler code to declare an
1548 unitialised external linkage data object. */
1549 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \
1550 ( fputs ("\n\t.comm ", (STREAM)), \
1551 assemble_name ((STREAM), (NAME)), \
1552 fprintf ((STREAM), "," HOST_WIDE_INT_PRINT_UNSIGNED"\n", ROUNDED))
1554 /* This says how to output assembler code to declare an
1555 unitialised internal linkage data object. */
1556 #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) \
1557 ( fputs ("\n\t.lcomm ", (STREAM)), \
1558 assemble_name ((STREAM), (NAME)), \
1559 fprintf ((STREAM), "," HOST_WIDE_INT_PRINT_UNSIGNED"\n", ROUNDED))
1561 /* Prettify the assembly. */
1562 extern int visium_indent_opcode
;
1564 #define ASM_OUTPUT_OPCODE(FILE, PTR) \
1566 if (visium_indent_opcode) \
1569 visium_indent_opcode = 0; \
1573 /* Configure-time default values for common options. */
1574 #define OPTION_DEFAULT_SPECS { "cpu", "%{!mcpu=*:-mcpu=%(VALUE)}" }
1576 /* Values of TARGET_CPU_DEFAULT specified via --with-cpu. */
1577 #define TARGET_CPU_gr5 0
1578 #define TARGET_CPU_gr6 1
1580 /* Default -mcpu multilib for above values. */
1581 #if TARGET_CPU_DEFAULT == TARGET_CPU_gr5
1582 #define MULTILIB_DEFAULTS { "mcpu=gr5" }
1583 #elif TARGET_CPU_DEFAULT == TARGET_CPU_gr6
1584 #define MULTILIB_DEFAULTS { "mcpu=gr6" }
1586 #error Unrecognized value in TARGET_CPU_DEFAULT