1 /* Stormy16 cpu description.
2 Copyright (C) 1997, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
4 Contributed by Red Hat, Inc.
6 This file is part of GNU CC.
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
24 /* Set up System V.4 (aka ELF) defaults. */
28 /* Driver configuration */
30 /* A C expression which determines whether the option `-CHAR' takes arguments.
31 The value should be the number of arguments that option takes-zero, for many
34 By default, this macro is defined to handle the standard options properly.
35 You need not define it unless you wish to add additional options which take
39 /* #define SWITCH_TAKES_ARG(CHAR) */
41 /* A C expression which determines whether the option `-NAME' takes arguments.
42 The value should be the number of arguments that option takes-zero, for many
43 options. This macro rather than `SWITCH_TAKES_ARG' is used for
44 multi-character option names.
46 By default, this macro is defined as `DEFAULT_WORD_SWITCH_TAKES_ARG', which
47 handles the standard options properly. You need not define
48 `WORD_SWITCH_TAKES_ARG' unless you wish to add additional options which take
49 arguments. Any redefinition should call `DEFAULT_WORD_SWITCH_TAKES_ARG' and
50 then check for additional options.
53 /* #define WORD_SWITCH_TAKES_ARG(NAME) */
55 /* A string-valued C expression which is nonempty if the linker needs a space
56 between the `-L' or `-o' option and its argument.
58 If this macro is not defined, the default value is 0. */
59 /* #define SWITCHES_NEED_SPACES "" */
61 /* A C string constant that tells the GNU CC driver program options to pass to
62 CPP. It can also specify how to translate options you give to GNU CC into
63 options for GNU CC to pass to the CPP.
65 Do not define this macro if it does not need to do anything. */
66 /* #define CPP_SPEC "" */
68 /* If this macro is defined, the preprocessor will not define the builtin macro
69 `__SIZE_TYPE__'. The macro `__SIZE_TYPE__' must then be defined by
72 This should be defined if `SIZE_TYPE' depends on target dependent flags
73 which are not accessible to the preprocessor. Otherwise, it should not be
75 /* #define NO_BUILTIN_SIZE_TYPE */
77 /* If this macro is defined, the preprocessor will not define the builtin macro
78 `__PTRDIFF_TYPE__'. The macro `__PTRDIFF_TYPE__' must then be defined by
81 This should be defined if `PTRDIFF_TYPE' depends on target dependent flags
82 which are not accessible to the preprocessor. Otherwise, it should not be
84 /* #define NO_BUILTIN_PTRDIFF_TYPE */
86 /* A C string constant that tells the GNU CC driver program options to pass to
87 CPP. By default, this macro is defined to pass the option
88 `-D__CHAR_UNSIGNED__' to CPP if `char' will be treated as `unsigned char' by
91 Do not define this macro unless you need to override the default definition. */
92 /* #if DEFAULT_SIGNED_CHAR
93 #define SIGNED_CHAR_SPEC "%{funsigned-char:-D__CHAR_UNSIGNED__}"
95 #define SIGNED_CHAR_SPEC "%{!fsigned-char:-D__CHAR_UNSIGNED__}"
98 /* A C string constant that tells the GNU CC driver program options to pass to
99 `cc1'. It can also specify how to translate options you give to GNU CC into
100 options for GNU CC to pass to the `cc1'.
102 Do not define this macro if it does not need to do anything. */
103 /* #define CC1_SPEC "" */
105 /* A C string constant that tells the GNU CC driver program options to pass to
106 `cc1plus'. It can also specify how to translate options you give to GNU CC
107 into options for GNU CC to pass to the `cc1plus'.
109 Do not define this macro if it does not need to do anything. */
110 /* #define CC1PLUS_SPEC "" */
112 /* A C string constant that tells the GNU CC driver program options to pass to
113 the assembler. It can also specify how to translate options you give to GNU
114 CC into options for GNU CC to pass to the assembler. See the file `sun3.h'
115 for an example of this.
117 Do not define this macro if it does not need to do anything.
119 Defined in svr4.h. */
122 /* A C string constant that tells the GNU CC driver program how to run any
123 programs which cleanup after the normal assembler. Normally, this is not
124 needed. See the file `mips.h' for an example of this.
126 Do not define this macro if it does not need to do anything.
128 Defined in svr4.h. */
129 /* #define ASM_FINAL_SPEC "" */
131 /* A C string constant that tells the GNU CC driver program options to pass to
132 the linker. It can also specify how to translate options you give to GNU CC
133 into options for GNU CC to pass to the linker.
135 Do not define this macro if it does not need to do anything.
137 Defined in svr4.h. */
138 /* #define LINK_SPEC "" */
140 /* Another C string constant used much like `LINK_SPEC'. The difference
141 between the two is that `LIB_SPEC' is used at the end of the command given
144 If this macro is not defined, a default is provided that loads the standard
145 C library from the usual place. See `gcc.c'.
147 Defined in svr4.h. */
150 #define LIB_SPEC "-( -lc %{msim:-lsim}%{!msim:-leva_app -lnosys} -)"
152 #define LIB_SPEC "-( -lc %{msim:-lsim} -)"
154 /* Another C string constant that tells the GNU CC driver program how and when
155 to place a reference to `libgcc.a' into the linker command line. This
156 constant is placed both before and after the value of `LIB_SPEC'.
158 If this macro is not defined, the GNU CC driver provides a default that
159 passes the string `-lgcc' to the linker unless the `-shared' option is
161 /* #define LIBGCC_SPEC "" */
163 /* Another C string constant used much like `LINK_SPEC'. The difference
164 between the two is that `STARTFILE_SPEC' is used at the very beginning of
165 the command given to the linker.
167 If this macro is not defined, a default is provided that loads the standard
168 C startup file from the usual place. See `gcc.c'.
170 Defined in svr4.h. */
171 #undef STARTFILE_SPEC
172 #define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s"
174 /* Another C string constant used much like `LINK_SPEC'. The difference
175 between the two is that `ENDFILE_SPEC' is used at the very end of the
176 command given to the linker.
178 Do not define this macro if it does not need to do anything.
180 Defined in svr4.h. */
182 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
184 /* Define this macro if the driver program should find the library `libgcc.a'
185 itself and should not pass `-L' options to the linker. If you do not define
186 this macro, the driver program will pass the argument `-lgcc' to tell the
187 linker to do the search and will pass `-L' options to it. */
188 /* #define LINK_LIBGCC_SPECIAL */
190 /* Define this macro if the driver program should find the library `libgcc.a'.
191 If you do not define this macro, the driver program will pass the argument
192 `-lgcc' to tell the linker to do the search. This macro is similar to
193 `LINK_LIBGCC_SPECIAL', except that it does not affect `-L' options. */
194 /* #define LINK_LIBGCC_SPECIAL_1 */
196 /* Define this macro to provide additional specifications to put in the `specs'
197 file that can be used in various specifications like `CC1_SPEC'.
199 The definition should be an initializer for an array of structures,
200 containing a string constant, that defines the specification name, and a
201 string constant that provides the specification.
203 Do not define this macro if it does not need to do anything. */
204 /* #define EXTRA_SPECS {{}} */
206 /* Define this macro as a C expression for the initializer of an array of
207 string to tell the driver program which options are defaults for this target
208 and thus do not need to be handled specially when using `MULTILIB_OPTIONS'.
210 Do not define this macro if `MULTILIB_OPTIONS' is not defined in the target
211 makefile fragment or if none of the options listed in `MULTILIB_OPTIONS' are
213 /* #define MULTILIB_DEFAULTS {} */
215 /* Define this macro to tell `gcc' that it should only translate a `-B' prefix
216 into a `-L' linker option if the prefix indicates an absolute file name. */
217 /* #define RELATIVE_PREFIX_NOT_LINKDIR */
219 /* Define this macro as a C string constant if you wish to override the
220 standard choice of `/usr/local/lib/gcc-lib/' as the default prefix to try
221 when searching for the executable files of the compiler. */
222 /* #define STANDARD_EXEC_PREFIX "" */
224 /* If defined, this macro is an additional prefix to try after
225 `STANDARD_EXEC_PREFIX'. `MD_EXEC_PREFIX' is not searched when the `-b'
226 option is used, or the compiler is built as a cross compiler.
228 Defined in svr4.h for host compilers. */
229 /* #define MD_EXEC_PREFIX "" */
231 /* Define this macro as a C string constant if you wish to override the
232 standard choice of `/usr/local/lib/' as the default prefix to try when
233 searching for startup files such as `crt0.o'. */
234 /* #define STANDARD_STARTFILE_PREFIX "" */
236 /* If defined, this macro supplies an additional prefix to try after the
237 standard prefixes. `MD_EXEC_PREFIX' is not searched when the `-b' option is
238 used, or when the compiler is built as a cross compiler.
240 Defined in svr4.h for host compilers. */
241 /* #define MD_STARTFILE_PREFIX "" */
243 /* If defined, this macro supplies yet another prefix to try after the standard
244 prefixes. It is not searched when the `-b' option is used, or when the
245 compiler is built as a cross compiler. */
246 /* #define MD_STARTFILE_PREFIX_1 "" */
248 /* Define this macro as a C string constant if you with to set environment
249 variables for programs called by the driver, such as the assembler and
250 loader. The driver passes the value of this macro to `putenv' to initialize
251 the necessary environment variables. */
252 /* #define INIT_ENVIRONMENT "" */
254 /* Define this macro as a C string constant if you wish to override the
255 standard choice of `/usr/local/include' as the default prefix to try when
256 searching for local header files. `LOCAL_INCLUDE_DIR' comes before
257 `SYSTEM_INCLUDE_DIR' in the search order.
259 Cross compilers do not use this macro and do not search either
260 `/usr/local/include' or its replacement. */
261 /* #define LOCAL_INCLUDE_DIR "" */
263 /* Define this macro as a C string constant if you wish to specify a
264 system-specific directory to search for header files before the standard
265 directory. `SYSTEM_INCLUDE_DIR' comes before `STANDARD_INCLUDE_DIR' in the
268 Cross compilers do not use this macro and do not search the directory
270 /* #define SYSTEM_INCLUDE_DIR "" */
272 /* Define this macro as a C string constant if you wish to override the
273 standard choice of `/usr/include' as the default prefix to try when
274 searching for header files.
276 Cross compilers do not use this macro and do not search either
277 `/usr/include' or its replacement. */
278 /* #define STANDARD_INCLUDE_DIR "" */
280 /* Define this macro if you wish to override the entire default search path for
281 include files. The default search path includes `GCC_INCLUDE_DIR',
282 `LOCAL_INCLUDE_DIR', `SYSTEM_INCLUDE_DIR', `GPLUSPLUS_INCLUDE_DIR', and
283 `STANDARD_INCLUDE_DIR'. In addition, `GPLUSPLUS_INCLUDE_DIR' and
284 `GCC_INCLUDE_DIR' are defined automatically by `Makefile', and specify
285 private search areas for GCC. The directory `GPLUSPLUS_INCLUDE_DIR' is used
286 only for C++ programs.
288 The definition should be an initializer for an array of structures. Each
289 array element should have two elements: the directory name (a string
290 constant) and a flag for C++-only directories. Mark the end of the array
291 with a null element. For example, here is the definition used for VMS:
293 #define INCLUDE_DEFAULTS \
295 { "GNU_GXX_INCLUDE:", 1}, \
296 { "GNU_CC_INCLUDE:", 0}, \
297 { "SYS$SYSROOT:[SYSLIB.]", 0}, \
302 Here is the order of prefixes tried for exec files:
304 1. Any prefixes specified by the user with `-B'.
306 2. The environment variable `GCC_EXEC_PREFIX', if any.
308 3. The directories specified by the environment variable
311 4. The macro `STANDARD_EXEC_PREFIX'.
315 6. The macro `MD_EXEC_PREFIX', if any.
317 Here is the order of prefixes tried for startfiles:
319 1. Any prefixes specified by the user with `-B'.
321 2. The environment variable `GCC_EXEC_PREFIX', if any.
323 3. The directories specified by the environment variable
324 `LIBRARY_PATH' (native only, cross compilers do not use this).
326 4. The macro `STANDARD_EXEC_PREFIX'.
330 6. The macro `MD_EXEC_PREFIX', if any.
332 7. The macro `MD_STARTFILE_PREFIX', if any.
334 8. The macro `STANDARD_STARTFILE_PREFIX'.
339 /* #define INCLUDE_DEFAULTS {{ }} */
342 /* Run-time target specifications */
344 /* Define this to be a string constant containing `-D' options to define the
345 predefined macros that identify this machine and system. These macros will
346 be predefined unless the `-ansi' option is specified.
348 In addition, a parallel set of macros are predefined, whose names are made
349 by appending `__' at the beginning and at the end. These `__' macros are
350 permitted by the ANSI standard, so they are predefined regardless of whether
351 `-ansi' is specified.
353 For example, on the Sun, one can use the following value:
355 "-Dmc68000 -Dsun -Dunix"
357 The result is to define the macros `__mc68000__', `__sun__' and `__unix__'
358 unconditionally, and the macros `mc68000', `sun' and `unix' provided `-ansi'
360 #define CPP_PREDEFINES "-Dstormy16 -Amachine=stormy16 -D__INT_MAX__=32767"
362 /* This declaration should be present. */
363 extern int target_flags;
365 /* This series of macros is to allow compiler command arguments to enable or
366 disable the use of optional features of the target machine. For example,
367 one machine description serves both the 68000 and the 68020; a command
368 argument tells the compiler whether it should use 68020-only instructions or
369 not. This command argument works by means of a macro `TARGET_68020' that
370 tests a bit in `target_flags'.
372 Define a macro `TARGET_FEATURENAME' for each such option. Its definition
373 should test a bit in `target_flags'; for example:
375 #define TARGET_68020 (target_flags & 1)
377 One place where these macros are used is in the condition-expressions of
378 instruction patterns. Note how `TARGET_68020' appears frequently in the
379 68000 machine description file, `m68k.md'. Another place they are used is
380 in the definitions of the other macros in the `MACHINE.h' file. */
381 /* #define TARGET_... */
383 /* This macro defines names of command options to set and clear bits in
384 `target_flags'. Its definition is an initializer with a subgrouping for
387 Each subgrouping contains a string constant, that defines the
388 option name, a number, which contains the bits to set in
389 `target_flags', and an optional second string which is the textual
390 description that will be displayed when the user passes --help on
391 the command line. If the number entry is negative then the
392 specified bits will be cleared instead of being set. If the second
393 string entry is present but empty, then no help information will be
394 displayed for that option, but it will not count as an undocumented
395 option. The actual option name, as seen on the command line is
396 made by appending `-m' to the specified name.
398 One of the subgroupings should have a null string. The number in this
399 grouping is the default value for `target_flags'. Any target options act
400 starting with that value.
402 Here is an example which defines `-m68000' and `-m68020' with opposite
403 meanings, and picks the latter as the default:
405 #define TARGET_SWITCHES \
406 { { "68020", 1, ""}, \
407 { "68000", -1, "Compile for the m68000"}, \
410 This declaration must be present. */
412 #define TARGET_SWITCHES \
413 {{ "sim", 0, "Provide libraries for the simulator" }, \
416 /* This macro is similar to `TARGET_SWITCHES' but defines names of command
417 options that have values. Its definition is an initializer with a
418 subgrouping for each command option.
420 Each subgrouping contains a string constant, that defines the fixed part of
421 the option name, the address of a variable, and an optional description string.
422 The variable, of type `char *', is set to the text following the fixed part of
423 the option as it is specified on the command line. The actual option name is
424 made by appending `-m' to the specified name.
426 Here is an example which defines `-mshort-data-NUMBER'. If the given option
427 is `-mshort-data-512', the variable `m88k_short_data' will be set to the
430 extern char *m88k_short_data;
431 #define TARGET_OPTIONS \
432 { { "short-data-", & m88k_short_data, \
433 "Specify the size of the short data section" } }
435 This declaration is optional. */
436 /* #define TARGET_OPTIONS */
438 /* This macro is a C statement to print on `stderr' a string describing the
439 particular machine description choice. Every machine description should
440 define `TARGET_VERSION'. For example:
443 #define TARGET_VERSION \
444 fprintf (stderr, " (68k, Motorola syntax)");
446 #define TARGET_VERSION \
447 fprintf (stderr, " (68k, MIT syntax)");
449 #define TARGET_VERSION fprintf (stderr, " (stormy16 cpu core)");
451 /* Sometimes certain combinations of command options do not make sense on a
452 particular target machine. You can define a macro `OVERRIDE_OPTIONS' to
453 take account of this. This macro, if defined, is executed once just after
454 all the command options have been parsed.
456 Don't use this macro to turn on various extra optimizations for `-O'. That
457 is what `OPTIMIZATION_OPTIONS' is for. */
458 /* #define OVERRIDE_OPTIONS */
460 /* Some machines may desire to change what optimizations are performed for
461 various optimization levels. This macro, if defined, is executed once just
462 after the optimization level is determined and before the remainder of the
463 command options have been parsed. Values set in this macro are used as the
464 default values for the other command line options.
466 LEVEL is the optimization level specified; 2 if `-O2' is specified, 1 if
467 `-O' is specified, and 0 if neither is specified.
469 SIZE is non-zero if `-Os' is specified, 0 otherwise.
471 You should not use this macro to change options that are not
472 machine-specific. These should uniformly selected by the same optimization
473 level on all supported machines. Use this macro to enable machbine-specific
476 *Do not examine `write_symbols' in this macro!* The debugging options are
477 *not supposed to alter the generated code. */
478 /* #define OPTIMIZATION_OPTIONS(LEVEL,SIZE) */
480 /* Define this macro if debugging can be performed even without a frame
481 pointer. If this macro is defined, GNU CC will turn on the
482 `-fomit-frame-pointer' option whenever `-O' is specified. */
483 #define CAN_DEBUG_WITHOUT_FP
488 /* Define this macro to have the value 1 if the most significant bit in a byte
489 has the lowest number; otherwise define it to have the value zero. This
490 means that bit-field instructions count from the most significant bit. If
491 the machine has no bit-field instructions, then this must still be defined,
492 but it doesn't matter which value it is defined to. This macro need not be
495 This macro does not affect the way structure fields are packed into bytes or
496 words; that is controlled by `BYTES_BIG_ENDIAN'. */
497 #define BITS_BIG_ENDIAN 1
499 /* Define this macro to have the value 1 if the most significant byte in a word
500 has the lowest number. This macro need not be a constant. */
501 #define BYTES_BIG_ENDIAN 0
503 /* Define this macro to have the value 1 if, in a multiword object, the most
504 significant word has the lowest number. This applies to both memory
505 locations and registers; GNU CC fundamentally assumes that the order of
506 words in memory is the same as the order in registers. This macro need not
508 #define WORDS_BIG_ENDIAN 0
510 /* Define this macro if WORDS_BIG_ENDIAN is not constant. This must be a
511 constant value with the same meaning as WORDS_BIG_ENDIAN, which will be used
512 only when compiling libgcc2.c. Typically the value will be set based on
513 preprocessor defines. */
514 /* #define LIBGCC2_WORDS_BIG_ENDIAN */
516 /* Define this macro to have the value 1 if `DFmode', `XFmode' or `TFmode'
517 floating point numbers are stored in memory with the word containing the
518 sign bit at the lowest address; otherwise define it to have the value 0.
519 This macro need not be a constant.
521 You need not define this macro if the ordering is the same as for multi-word
523 /* #define FLOAT_WORDS_BIG_ENDIAN */
525 /* Define this macro to be the number of bits in an addressable storage unit
526 (byte); normally 8. */
527 #define BITS_PER_UNIT 8
529 /* Number of bits in a word; normally 32. */
530 #define BITS_PER_WORD 16
532 /* Maximum number of bits in a word. If this is undefined, the default is
533 `BITS_PER_WORD'. Otherwise, it is the constant value that is the largest
534 value that `BITS_PER_WORD' can have at run-time. */
535 /* #define MAX_BITS_PER_WORD */
537 /* Number of storage units in a word; normally 4. */
538 #define UNITS_PER_WORD 2
540 /* Minimum number of units in a word. If this is undefined, the default is
541 `UNITS_PER_WORD'. Otherwise, it is the constant value that is the smallest
542 value that `UNITS_PER_WORD' can have at run-time. */
543 /* #define MIN_UNITS_PER_WORD */
545 /* Width of a pointer, in bits. You must specify a value no wider than the
546 width of `Pmode'. If it is not equal to the width of `Pmode', you must
547 define `POINTERS_EXTEND_UNSIGNED'. */
548 #define POINTER_SIZE 16
550 /* A C expression whose value is nonzero if pointers that need to be extended
551 from being `POINTER_SIZE' bits wide to `Pmode' are sign-extended and zero if
552 they are zero-extended.
554 You need not define this macro if the `POINTER_SIZE' is equal to the width
556 /* #define POINTERS_EXTEND_UNSIGNED */
558 /* A macro to update MODE and UNSIGNEDP when an object whose type is TYPE and
559 which has the specified mode and signedness is to be stored in a register.
560 This macro is only called when TYPE is a scalar type.
562 On most RISC machines, which only have operations that operate on a full
563 register, define this macro to set M to `word_mode' if M is an integer mode
564 narrower than `BITS_PER_WORD'. In most cases, only integer modes should be
565 widened because wider-precision floating-point operations are usually more
566 expensive than their narrower counterparts.
568 For most machines, the macro definition does not change UNSIGNEDP. However,
569 some machines, have instructions that preferentially handle either signed or
570 unsigned quantities of certain modes. For example, on the DEC Alpha, 32-bit
571 loads from memory and 32-bit add instructions sign-extend the result to 64
572 bits. On such machines, set UNSIGNEDP according to which kind of extension
575 Do not define this macro if it would never modify MODE. */
576 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
578 if (GET_MODE_CLASS (MODE) == MODE_INT \
579 && GET_MODE_SIZE (MODE) < 2) \
583 /* Define this macro if the promotion described by `PROMOTE_MODE' should also
584 be done for outgoing function arguments. */
585 #define PROMOTE_FUNCTION_ARGS 1
587 /* Define this macro if the promotion described by `PROMOTE_MODE' should also
588 be done for the return value of functions.
590 If this macro is defined, `FUNCTION_VALUE' must perform the same promotions
591 done by `PROMOTE_MODE'. */
592 #define PROMOTE_FUNCTION_RETURN 1
594 /* Define this macro if the promotion described by `PROMOTE_MODE' should *only*
595 be performed for outgoing function arguments or function return values, as
596 specified by `PROMOTE_FUNCTION_ARGS' and `PROMOTE_FUNCTION_RETURN',
598 /* #define PROMOTE_FOR_CALL_ONLY */
600 /* Normal alignment required for function parameters on the stack, in bits.
601 All stack parameters receive at least this much alignment regardless of data
602 type. On most machines, this is the same as the size of an integer. */
603 #define PARM_BOUNDARY 16
605 /* Define this macro if you wish to preserve a certain alignment for the stack
606 pointer. The definition is a C expression for the desired alignment
609 If `PUSH_ROUNDING' is not defined, the stack will always be aligned to the
610 specified boundary. If `PUSH_ROUNDING' is defined and specifies a less
611 strict alignment than `STACK_BOUNDARY', the stack may be momentarily
612 unaligned while pushing arguments. */
613 #define STACK_BOUNDARY 16
615 /* Alignment required for a function entry point, in bits. */
616 #define FUNCTION_BOUNDARY 16
618 /* Biggest alignment that any data type can require on this machine,
620 #define BIGGEST_ALIGNMENT 16
622 /* Biggest alignment that any structure field can require on this machine, in
623 bits. If defined, this overrides `BIGGEST_ALIGNMENT' for structure fields
625 /* #define BIGGEST_FIELD_ALIGNMENT */
627 /* An expression for the alignment of a structure field FIELD if the
628 alignment computed in the usual way is COMPUTED. GNU CC uses this
629 value instead of the value in `BIGGEST_ALIGNMENT' or
630 `BIGGEST_FIELD_ALIGNMENT', if defined, for structure fields only. */
631 /* #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) */
633 /* Biggest alignment supported by the object file format of this machine. Use
634 this macro to limit the alignment which can be specified using the
635 `__attribute__ ((aligned (N)))' construct. If not defined, the default
636 value is `BIGGEST_ALIGNMENT'.
638 Defined in svr4.h. */
639 /* #define MAX_OFILE_ALIGNMENT */
641 /* If defined, a C expression to compute the alignment for a static variable.
642 TYPE is the data type, and ALIGN is the alignment that the object
643 would ordinarily have. The value of this macro is used instead of that
644 alignment to align the object.
646 If this macro is not defined, then ALIGN is used.
648 One use of this macro is to increase alignment of medium-size data to make
649 it all fit in fewer cache lines. Another is to cause character arrays to be
650 word-aligned so that `strcpy' calls that copy constants to character arrays
651 can be done inline. */
652 #define DATA_ALIGNMENT(TYPE, ALIGN) \
653 (TREE_CODE (TYPE) == ARRAY_TYPE \
654 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
655 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
657 /* If defined, a C expression to compute the alignment given to a constant that
658 is being placed in memory. CONSTANT is the constant and ALIGN is the
659 alignment that the object would ordinarily have. The value of this macro is
660 used instead of that alignment to align the object.
662 If this macro is not defined, then ALIGN is used.
664 The typical use of this macro is to increase alignment for string constants
665 to be word aligned so that `strcpy' calls that copy constants can be done
667 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
668 (TREE_CODE (EXP) == STRING_CST \
669 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
671 /* Alignment in bits to be given to a structure bit field that follows an empty
672 field such as `int : 0;'.
674 Note that `PCC_BITFIELD_TYPE_MATTERS' also affects the alignment that
675 results from an empty field. */
676 /* #define EMPTY_FIELD_BOUNDARY */
678 /* Number of bits which any structure or union's size must be a multiple of.
679 Each structure or union's size is rounded up to a multiple of this.
681 If you do not define this macro, the default is the same as `BITS_PER_UNIT'. */
682 /* #define STRUCTURE_SIZE_BOUNDARY */
684 /* Define this macro to be the value 1 if instructions will fail to work if
685 given data not on the nominal alignment. If instructions will merely go
686 slower in that case, define this macro as 0. */
687 #define STRICT_ALIGNMENT 1
689 /* Define this if you wish to imitate the way many other C compilers handle
690 alignment of bitfields and the structures that contain them.
692 The behavior is that the type written for a bitfield (`int', `short', or
693 other integer type) imposes an alignment for the entire structure, as if the
694 structure really did contain an ordinary field of that type. In addition,
695 the bitfield is placed within the structure so that it would fit within such
696 a field, not crossing a boundary for it.
698 Thus, on most machines, a bitfield whose type is written as `int' would not
699 cross a four-byte boundary, and would force four-byte alignment for the
700 whole structure. (The alignment used may not be four bytes; it is
701 controlled by the other alignment parameters.)
703 If the macro is defined, its definition should be a C expression; a nonzero
704 value for the expression enables this behavior.
706 Note that if this macro is not defined, or its value is zero, some bitfields
707 may cross more than one alignment boundary. The compiler can support such
708 references if there are `insv', `extv', and `extzv' insns that can directly
711 The other known way of making bitfields work is to define
712 `STRUCTURE_SIZE_BOUNDARY' as large as `BIGGEST_ALIGNMENT'. Then every
713 structure can be accessed with fullwords.
715 Unless the machine has bitfield instructions or you define
716 `STRUCTURE_SIZE_BOUNDARY' that way, you must define
717 `PCC_BITFIELD_TYPE_MATTERS' to have a nonzero value.
719 If your aim is to make GNU CC use the same conventions for laying out
720 bitfields as are used by another compiler, here is how to investigate what
721 the other compiler does. Compile and run this program:
739 printf ("Size of foo1 is %d\n",
740 sizeof (struct foo1));
741 printf ("Size of foo2 is %d\n",
742 sizeof (struct foo2));
746 If this prints 2 and 5, then the compiler's behavior is what you would get
747 from `PCC_BITFIELD_TYPE_MATTERS'.
749 Defined in svr4.h. */
750 #define PCC_BITFIELD_TYPE_MATTERS 1
752 /* Like PCC_BITFIELD_TYPE_MATTERS except that its effect is limited to aligning
753 a bitfield within the structure. */
754 /* #define BITFIELD_NBYTES_LIMITED */
756 /* Define this macro as an expression for the overall size of a structure
757 (given by STRUCT as a tree node) when the size computed from the fields is
758 SIZE and the alignment is ALIGN.
760 The default is to round SIZE up to a multiple of ALIGN. */
761 /* #define ROUND_TYPE_SIZE(STRUCT, SIZE, ALIGN) */
763 /* Define this macro as an expression for the alignment of a structure (given
764 by STRUCT as a tree node) if the alignment computed in the usual way is
765 COMPUTED and the alignment explicitly specified was SPECIFIED.
767 The default is to use SPECIFIED if it is larger; otherwise, use the smaller
768 of COMPUTED and `BIGGEST_ALIGNMENT' */
769 /* #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) */
771 /* An integer expression for the size in bits of the largest integer machine
772 mode that should actually be used. All integer machine modes of this size
773 or smaller can be used for structures and unions with the appropriate sizes.
774 If this macro is undefined, `GET_MODE_BITSIZE (DImode)' is assumed. */
775 /* #define MAX_FIXED_MODE_SIZE */
777 /* A C statement to validate the value VALUE (of type `double') for mode MODE.
778 This means that you check whether VALUE fits within the possible range of
779 values for mode MODE on this target machine. The mode MODE is always a mode
780 of class `MODE_FLOAT'. OVERFLOW is nonzero if the value is already known to
783 If VALUE is not valid or if OVERFLOW is nonzero, you should set OVERFLOW to
784 1 and then assign some valid value to VALUE. Allowing an invalid value to
785 go through the compiler can produce incorrect assembler code which may even
786 cause Unix assemblers to crash.
788 This macro need not be defined if there is no work for it to do. */
789 /* #define CHECK_FLOAT_VALUE(MODE, VALUE, OVERFLOW) */
791 /* A code distinguishing the floating point format of the target machine.
792 There are three defined values:
795 This code indicates IEEE floating point. It is the default;
796 there is no need to define this macro when the format is IEEE.
799 This code indicates the peculiar format used on the Vax.
801 UNKNOWN_FLOAT_FORMAT'
802 This code indicates any other format.
804 The value of this macro is compared with `HOST_FLOAT_FORMAT'
805 to determine whether the target machine has the same format as
806 the host machine. If any other formats are actually in use on supported
807 machines, new codes should be defined for them.
809 The ordering of the component words of floating point values stored in
810 memory is controlled by `FLOAT_WORDS_BIG_ENDIAN' for the target machine and
811 `HOST_FLOAT_WORDS_BIG_ENDIAN' for the host. */
812 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
814 /* GNU CC supports two ways of implementing C++ vtables: traditional or with
815 so-called "thunks". The flag `-fvtable-thunk' chooses between them. Define
816 this macro to be a C expression for the default value of that flag. If
817 `DEFAULT_VTABLE_THUNKS' is 0, GNU CC uses the traditional implementation by
818 default. The "thunk" implementation is more efficient (especially if you
819 have provided an implementation of `ASM_OUTPUT_MI_THUNK', but is not binary
820 compatible with code compiled using the traditional implementation. If you
821 are writing a new ports, define `DEFAULT_VTABLE_THUNKS' to 1.
823 If you do not define this macro, the default for `-fvtable-thunk' is 0. */
824 #define DEFAULT_VTABLE_THUNKS 1
827 /* Layout of Source Language Data Types */
829 /* A C expression for the size in bits of the type `int' on the target machine.
830 If you don't define this, the default is one word. */
831 #define INT_TYPE_SIZE 16
833 /* Maximum number for the size in bits of the type `int' on the target machine.
834 If this is undefined, the default is `INT_TYPE_SIZE'. Otherwise, it is the
835 constant value that is the largest value that `INT_TYPE_SIZE' can have at
836 run-time. This is used in `cpp'. */
837 /* #define MAX_INT_TYPE_SIZE */
839 /* A C expression for the size in bits of the type `short' on the target
840 machine. If you don't define this, the default is half a word. (If this
841 would be less than one storage unit, it is rounded up to one unit.) */
842 #define SHORT_TYPE_SIZE 16
844 /* A C expression for the size in bits of the type `long' on the target
845 machine. If you don't define this, the default is one word. */
846 #define LONG_TYPE_SIZE 32
848 /* Maximum number for the size in bits of the type `long' on the target
849 machine. If this is undefined, the default is `LONG_TYPE_SIZE'. Otherwise,
850 it is the constant value that is the largest value that `LONG_TYPE_SIZE' can
851 have at run-time. This is used in `cpp'. */
852 /* #define MAX_LONG_TYPE_SIZE */
854 /* A C expression for the size in bits of the type `long long' on the target
855 machine. If you don't define this, the default is two words. If you want
856 to support GNU Ada on your machine, the value of macro must be at least 64. */
857 #define LONG_LONG_TYPE_SIZE 64
859 /* A C expression for the size in bits of the type `char' on the target
860 machine. If you don't define this, the default is one quarter of a word.
861 (If this would be less than one storage unit, it is rounded up to one unit.) */
862 #define CHAR_TYPE_SIZE 8
864 /* Maximum number for the size in bits of the type `char' on the target
865 machine. If this is undefined, the default is `CHAR_TYPE_SIZE'. Otherwise,
866 it is the constant value that is the largest value that `CHAR_TYPE_SIZE' can
867 have at run-time. This is used in `cpp'. */
868 /* #define MAX_CHAR_TYPE_SIZE */
870 /* A C expression for the size in bits of the type `float' on the target
871 machine. If you don't define this, the default is one word. */
872 #define FLOAT_TYPE_SIZE 32
874 /* A C expression for the size in bits of the type `double' on the target
875 machine. If you don't define this, the default is two words. */
876 #define DOUBLE_TYPE_SIZE 64
878 /* A C expression for the size in bits of the type `long double' on the target
879 machine. If you don't define this, the default is two words. */
880 #define LONG_DOUBLE_TYPE_SIZE 64
882 /* An expression whose value is 1 or 0, according to whether the type `char'
883 should be signed or unsigned by default. The user can always override this
884 default with the options `-fsigned-char' and `-funsigned-char'. */
885 #define DEFAULT_SIGNED_CHAR 0
887 /* A C expression to determine whether to give an `enum' type only as many
888 bytes as it takes to represent the range of possible values of that type. A
889 nonzero value means to do that; a zero value means all `enum' types should
890 be allocated like `int'.
892 If you don't define the macro, the default is 0. */
893 /* #define DEFAULT_SHORT_ENUMS */
895 /* A C expression for a string describing the name of the data type to use for
896 size values. The typedef name `size_t' is defined using the contents of the
899 The string can contain more than one keyword. If so, separate them with
900 spaces, and write first any length keyword, then `unsigned' if appropriate,
901 and finally `int'. The string must exactly match one of the data type names
902 defined in the function `init_decl_processing' in the file `c-decl.c'. You
903 may not omit `int' or change the order--that would cause the compiler to
906 If you don't define this macro, the default is `"long unsigned int"'.
908 Defined in svr4.h. */
909 #define SIZE_TYPE "unsigned int"
911 /* A C expression for a string describing the name of the data type to use for
912 the result of subtracting two pointers. The typedef name `ptrdiff_t' is
913 defined using the contents of the string. See `SIZE_TYPE' above for more
916 If you don't define this macro, the default is `"long int"'.
918 Defined in svr4.h. */
919 #define PTRDIFF_TYPE "int"
921 /* A C expression for a string describing the name of the data type to use for
922 wide characters. The typedef name `wchar_t' is defined using the contents
923 of the string. See `SIZE_TYPE' above for more information.
925 If you don't define this macro, the default is `"int"'.
927 Defined in svr4.h, to "long int". */
928 /* #define WCHAR_TYPE "long int" */
930 /* A C expression for the size in bits of the data type for wide characters.
931 This is used in `cpp', which cannot make use of `WCHAR_TYPE'.
933 Defined in svr4.h. */
934 #undef WCHAR_TYPE_SIZE
935 #define WCHAR_TYPE_SIZE 32
937 /* Maximum number for the size in bits of the data type for wide characters.
938 If this is undefined, the default is `WCHAR_TYPE_SIZE'. Otherwise, it is
939 the constant value that is the largest value that `WCHAR_TYPE_SIZE' can have
940 at run-time. This is used in `cpp'. */
941 /* #define MAX_WCHAR_TYPE_SIZE */
943 /* Define this macro if the type of Objective C selectors should be `int'.
945 If this macro is not defined, then selectors should have the type `struct
947 /* #define OBJC_INT_SELECTORS */
949 /* Define this macro if the compiler can group all the selectors together into
950 a vector and use just one label at the beginning of the vector. Otherwise,
951 the compiler must give each selector its own assembler label.
953 On certain machines, it is important to have a separate label for each
954 selector because this enables the linker to eliminate duplicate selectors. */
955 /* #define OBJC_SELECTORS_WITHOUT_LABELS */
958 /* Register Basics */
960 /* Number of hardware registers known to the compiler. They receive numbers 0
961 through `FIRST_PSEUDO_REGISTER-1'; thus, the first pseudo register's number
962 really is assigned the number `FIRST_PSEUDO_REGISTER'. */
963 #define FIRST_PSEUDO_REGISTER 19
965 /* An initializer that says which registers are used for fixed purposes all
966 throughout the compiled code and are therefore not available for general
967 allocation. These would include the stack pointer, the frame pointer
968 (except on machines where that can be used as a general register when no
969 frame pointer is needed), the program counter on machines where that is
970 considered one of the addressable registers, and any other numbered register
973 This information is expressed as a sequence of numbers, separated by commas
974 and surrounded by braces. The Nth number is 1 if register N is fixed, 0
977 The table initialized from this macro, and the table initialized by the
978 following one, may be overridden at run time either automatically, by the
979 actions of the macro `CONDITIONAL_REGISTER_USAGE', or by the user with the
980 command options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'. */
981 #define FIXED_REGISTERS \
982 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1 }
984 /* Like `FIXED_REGISTERS' but has 1 for each register that is clobbered (in
985 general) by function calls as well as for fixed registers. This macro
986 therefore identifies the registers that are not available for general
987 allocation of values that must live across function calls.
989 If a register has 0 in `CALL_USED_REGISTERS', the compiler automatically
990 saves it on function entry and restores it on function exit, if the register
991 is used within the function. */
992 #define CALL_USED_REGISTERS \
993 { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1 }
995 /* Zero or more C statements that may conditionally modify two variables
996 `fixed_regs' and `call_used_regs' (both of type `char []') after they have
997 been initialized from the two preceding macros.
999 This is necessary in case the fixed or call-clobbered registers depend on
1002 You need not define this macro if it has no work to do.
1004 If the usage of an entire class of registers depends on the target flags,
1005 you may indicate this to GCC by using this macro to modify `fixed_regs' and
1006 `call_used_regs' to 1 for each of the registers in the classes which should
1007 not be used by GCC. Also define the macro `REG_CLASS_FROM_LETTER' to return
1008 `NO_REGS' if it is called with a letter for a class that shouldn't be used.
1010 (However, if this class is not included in `GENERAL_REGS' and all of the
1011 insn patterns whose constraints permit this class are controlled by target
1012 switches, then GCC will automatically avoid using these registers when the
1013 target switches are opposed to them.) */
1014 /* #define CONDITIONAL_REGISTER_USAGE */
1016 /* If this macro is defined and has a nonzero value, it means that `setjmp' and
1017 related functions fail to save the registers, or that `longjmp' fails to
1018 restore them. To compensate, the compiler avoids putting variables in
1019 registers in functions that use `setjmp'. */
1020 /* #define NON_SAVING_SETJMP */
1022 /* Define this macro if the target machine has register windows. This C
1023 expression returns the register number as seen by the called function
1024 corresponding to the register number OUT as seen by the calling function.
1025 Return OUT if register number OUT is not an outbound register. */
1026 /* #define INCOMING_REGNO(OUT) */
1028 /* Define this macro if the target machine has register windows. This C
1029 expression returns the register number as seen by the calling function
1030 corresponding to the register number IN as seen by the called function.
1031 Return IN if register number IN is not an inbound register. */
1032 /* #define OUTGOING_REGNO(IN) */
1035 /* Order of allocation of registers */
1037 /* If defined, an initializer for a vector of integers, containing the numbers
1038 of hard registers in the order in which GNU CC should prefer to use them
1039 (from most preferred to least).
1041 If this macro is not defined, registers are used lowest numbered first (all
1044 One use of this macro is on machines where the highest numbered registers
1045 must always be saved and the save-multiple-registers instruction supports
1046 only sequences of consecutive registers. On such machines, define
1047 `REG_ALLOC_ORDER' to be an initializer that lists the highest numbered
1048 allocatable register first. */
1049 #define REG_ALLOC_ORDER { 7, 6, 5, 4, 3, 2, 1, 0, 9, 8, 10, 11, 12, 13, 14, 15, 16 }
1051 /* A C statement (sans semicolon) to choose the order in which to allocate hard
1052 registers for pseudo-registers local to a basic block.
1054 Store the desired register order in the array `reg_alloc_order'. Element 0
1055 should be the register to allocate first; element 1, the next register; and
1058 The macro body should not assume anything about the contents of
1059 `reg_alloc_order' before execution of the macro.
1061 On most machines, it is not necessary to define this macro. */
1062 /* #define ORDER_REGS_FOR_LOCAL_ALLOC */
1065 /* How Values Fit in Registers */
1067 /* A C expression for the number of consecutive hard registers, starting at
1068 register number REGNO, required to hold a value of mode MODE.
1070 On a machine where all registers are exactly one word, a suitable definition
1073 #define HARD_REGNO_NREGS(REGNO, MODE) \
1074 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
1075 / UNITS_PER_WORD)) */
1076 #define HARD_REGNO_NREGS(REGNO, MODE) \
1077 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
1079 /* A C expression that is nonzero if it is permissible to store a value of mode
1080 MODE in hard register number REGNO (or in several registers starting with
1081 that one). For a machine where all registers are equivalent, a suitable
1084 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
1086 It is not necessary for this macro to check for the numbers of fixed
1087 registers, because the allocation mechanism considers them to be always
1090 On some machines, double-precision values must be kept in even/odd register
1091 pairs. The way to implement that is to define this macro to reject odd
1092 register numbers for such modes.
1094 The minimum requirement for a mode to be OK in a register is that the
1095 `movMODE' instruction pattern support moves between the register and any
1096 other hard register for which the mode is OK; and that moving a value into
1097 the register and back out not alter it.
1099 Since the same instruction used to move `SImode' will work for all narrower
1100 integer modes, it is not necessary on any machine for `HARD_REGNO_MODE_OK'
1101 to distinguish between these modes, provided you define patterns `movhi',
1102 etc., to take advantage of this. This is useful because of the interaction
1103 between `HARD_REGNO_MODE_OK' and `MODES_TIEABLE_P'; it is very desirable for
1104 all integer modes to be tieable.
1106 Many machines have special registers for floating point arithmetic. Often
1107 people assume that floating point machine modes are allowed only in floating
1108 point registers. This is not true. Any registers that can hold integers
1109 can safely *hold* a floating point machine mode, whether or not floating
1110 arithmetic can be done on it in those registers. Integer move instructions
1111 can be used to move the values.
1113 On some machines, though, the converse is true: fixed-point machine modes
1114 may not go in floating registers. This is true if the floating registers
1115 normalize any value stored in them, because storing a non-floating value
1116 there would garble it. In this case, `HARD_REGNO_MODE_OK' should reject
1117 fixed-point machine modes in floating registers. But if the floating
1118 registers do not automatically normalize, if you can store any bit pattern
1119 in one and retrieve it unchanged without a trap, then any machine mode may
1120 go in a floating register, so you can define this macro to say so.
1122 The primary significance of special floating registers is rather that they
1123 are the registers acceptable in floating point arithmetic instructions.
1124 However, this is of no concern to `HARD_REGNO_MODE_OK'. You handle it by
1125 writing the proper constraints for those instructions.
1127 On some machines, the floating registers are especially slow to access, so
1128 that it is better to store a value in a stack frame than in such a register
1129 if floating point arithmetic is not being done. As long as the floating
1130 registers are not in class `GENERAL_REGS', they will not be used unless some
1131 pattern's constraint asks for one. */
1132 #define HARD_REGNO_MODE_OK(REGNO, MODE) ((REGNO) != 16 || (MODE) == BImode)
1134 /* A C expression that is nonzero if it is desirable to choose register
1135 allocation so as to avoid move instructions between a value of mode MODE1
1136 and a value of mode MODE2.
1138 If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, MODE2)' are
1139 ever different for any R, then `MODES_TIEABLE_P (MODE1, MODE2)' must be
1141 #define MODES_TIEABLE_P(MODE1, MODE2) ((MODE1) != BImode && (MODE2) != BImode)
1143 /* Define this macro if the compiler should avoid copies to/from CCmode
1144 registers. You should only define this macro if support fo copying to/from
1145 CCmode is incomplete. */
1146 /* #define AVOID_CCMODE_COPIES */
1149 /* Handling Leaf Functions */
1151 /* A C initializer for a vector, indexed by hard register number, which
1152 contains 1 for a register that is allowable in a candidate for leaf function
1155 If leaf function treatment involves renumbering the registers, then the
1156 registers marked here should be the ones before renumbering--those that GNU
1157 CC would ordinarily allocate. The registers which will actually be used in
1158 the assembler code, after renumbering, should not be marked with 1 in this
1161 Define this macro only if the target machine offers a way to optimize the
1162 treatment of leaf functions. */
1163 /* #define LEAF_REGISTERS */
1165 /* A C expression whose value is the register number to which REGNO should be
1166 renumbered, when a function is treated as a leaf function.
1168 If REGNO is a register number which should not appear in a leaf function
1169 before renumbering, then the expression should yield -1, which will cause
1170 the compiler to abort.
1172 Define this macro only if the target machine offers a way to optimize the
1173 treatment of leaf functions, and registers need to be renumbered to do this. */
1174 /* #define LEAF_REG_REMAP(REGNO) */
1177 /* Registers That Form a Stack. */
1179 /* Define this if the machine has any stack-like registers. */
1180 /* #define STACK_REGS */
1182 /* The number of the first stack-like register. This one is the top
1184 /* #define FIRST_STACK_REG */
1186 /* The number of the last stack-like register. This one is the
1187 bottom of the stack. */
1188 /* #define LAST_STACK_REG */
1191 /* Register Classes */
1193 /* An enumeral type that must be defined with all the register class names as
1194 enumeral values. `NO_REGS' must be first. `ALL_REGS' must be the last
1195 register class, followed by one more enumeral value, `LIM_REG_CLASSES',
1196 which is not a register class but rather tells how many classes there are.
1198 Each register class has a number, which is the value of casting the class
1199 name to type `int'. The number serves as an index in many of the tables
1217 /* The number of distinct register classes, defined as follows:
1219 #define N_REG_CLASSES (int) LIM_REG_CLASSES */
1220 #define N_REG_CLASSES ((int) LIM_REG_CLASSES)
1222 /* An initializer containing the names of the register classes as C string
1223 constants. These names are used in writing some of the debugging dumps. */
1224 #define REG_CLASS_NAMES \
1239 /* An initializer containing the contents of the register classes, as integers
1240 which are bit masks. The Nth integer specifies the contents of class N.
1241 The way the integer MASK is interpreted is that register R is in the class
1242 if `MASK & (1 << R)' is 1.
1244 When the machine has more than 32 registers, an integer does not suffice.
1245 Then the integers are replaced by sub-initializers, braced groupings
1246 containing several integers. Each sub-initializer must be suitable as an
1247 initializer for the type `HARD_REG_SET' which is defined in
1248 `hard-reg-set.h'. */
1249 #define REG_CLASS_CONTENTS \
1261 (1 << FIRST_PSEUDO_REGISTER) - 1 \
1264 /* A C expression whose value is a register class containing hard register
1265 REGNO. In general there is more than one such class; choose a class which
1266 is "minimal", meaning that no smaller class also contains the register. */
1267 #define REGNO_REG_CLASS(REGNO) \
1268 ((REGNO) == 0 ? R0_REGS \
1269 : (REGNO) == 1 ? R1_REGS \
1270 : (REGNO) == 2 ? R2_REGS \
1271 : (REGNO) < 8 ? EIGHT_REGS \
1272 : (REGNO) == 8 ? R8_REGS \
1273 : (REGNO) == 16 ? CARRY_REGS \
1274 : (REGNO) <= 18 ? GENERAL_REGS \
1277 /* A macro whose definition is the name of the class to which a valid base
1278 register must belong. A base register is one used in an address which is
1279 the register value plus a displacement. */
1280 #define BASE_REG_CLASS GENERAL_REGS
1282 /* A macro whose definition is the name of the class to which a valid index
1283 register must belong. An index register is one used in an address where its
1284 value is either multiplied by a scale factor or added to another register
1285 (as well as added to a displacement). */
1286 #define INDEX_REG_CLASS GENERAL_REGS
1288 /* A C expression which defines the machine-dependent operand constraint
1289 letters for register classes. If CHAR is such a letter, the value should be
1290 the register class corresponding to it. Otherwise, the value should be
1291 `NO_REGS'. The register letter `r', corresponding to class `GENERAL_REGS',
1292 will not be passed to this macro; you do not need to handle it.
1294 The following letters are unavailable, due to being used as
1299 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P'
1300 'Q', 'R', 'S', 'T', 'U'
1302 'g', 'i', 'm', 'n', 'o', 'p', 'r', 's' */
1304 #define REG_CLASS_FROM_LETTER(CHAR) \
1305 ( (CHAR) == 'a' ? R0_REGS \
1306 : (CHAR) == 'b' ? R1_REGS \
1307 : (CHAR) == 'c' ? R2_REGS \
1308 : (CHAR) == 'd' ? R8_REGS \
1309 : (CHAR) == 'e' ? EIGHT_REGS \
1310 : (CHAR) == 't' ? TWO_REGS \
1311 : (CHAR) == 'y' ? CARRY_REGS \
1312 : (CHAR) == 'z' ? ICALL_REGS \
1315 /* A C expression which is nonzero if register number NUM is suitable for use
1316 as a base register in operand addresses. It may be either a suitable hard
1317 register or a pseudo register that has been allocated such a hard register. */
1318 #define REGNO_OK_FOR_BASE_P(NUM) 1
1320 /* A C expression which is nonzero if register number NUM is suitable for use
1321 as an index register in operand addresses. It may be either a suitable hard
1322 register or a pseudo register that has been allocated such a hard register.
1324 The difference between an index register and a base register is that the
1325 index register may be scaled. If an address involves the sum of two
1326 registers, neither one of them scaled, then either one may be labeled the
1327 "base" and the other the "index"; but whichever labeling is used must fit
1328 the machine's constraints of which registers may serve in each capacity.
1329 The compiler will try both labelings, looking for one that is valid, and
1330 will reload one or both registers only if neither labeling works. */
1331 #define REGNO_OK_FOR_INDEX_P(NUM) REGNO_OK_FOR_BASE_P (NUM)
1333 /* A C expression that places additional restrictions on the register class to
1334 use when it is necessary to copy value X into a register in class CLASS.
1335 The value is a register class; perhaps CLASS, or perhaps another, smaller
1336 class. On many machines, the following definition is safe:
1338 #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS
1340 Sometimes returning a more restrictive class makes better code. For
1341 example, on the 68000, when X is an integer constant that is in range for a
1342 `moveq' instruction, the value of this macro is always `DATA_REGS' as long
1343 as CLASS includes the data registers. Requiring a data register guarantees
1344 that a `moveq' will be used.
1346 If X is a `const_double', by returning `NO_REGS' you can force X into a
1347 memory constant. This is useful on certain machines where immediate
1348 floating values cannot be loaded into certain kinds of registers.
1350 This declaration must be present. */
1351 #define PREFERRED_RELOAD_CLASS(X, CLASS) \
1352 stormy16_preferred_reload_class (X, CLASS)
1354 /* Like `PREFERRED_RELOAD_CLASS', but for output reloads instead of input
1355 reloads. If you don't define this macro, the default is to use CLASS,
1357 #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) \
1358 stormy16_preferred_reload_class (X, CLASS)
1360 /* A C expression that places additional restrictions on the register class to
1361 use when it is necessary to be able to hold a value of mode MODE in a reload
1362 register for which class CLASS would ordinarily be used.
1364 Unlike `PREFERRED_RELOAD_CLASS', this macro should be used when there are
1365 certain modes that simply can't go in certain reload classes.
1367 The value is a register class; perhaps CLASS, or perhaps another, smaller
1370 Don't define this macro unless the target machine has limitations which
1371 require the macro to do something nontrivial. */
1372 /* #define LIMIT_RELOAD_CLASS(MODE, CLASS) */
1374 /* Many machines have some registers that cannot be copied directly to or from
1375 memory or even from other types of registers. An example is the `MQ'
1376 register, which on most machines, can only be copied to or from general
1377 registers, but not memory. Some machines allow copying all registers to and
1378 from memory, but require a scratch register for stores to some memory
1379 locations (e.g., those with symbolic address on the RT, and those with
1380 certain symbolic address on the Sparc when compiling PIC). In some cases,
1381 both an intermediate and a scratch register are required.
1383 You should define these macros to indicate to the reload phase that it may
1384 need to allocate at least one register for a reload in addition to the
1385 register to contain the data. Specifically, if copying X to a register
1386 CLASS in MODE requires an intermediate register, you should define
1387 `SECONDARY_INPUT_RELOAD_CLASS' to return the largest register class all of
1388 whose registers can be used as intermediate registers or scratch registers.
1390 If copying a register CLASS in MODE to X requires an intermediate or scratch
1391 register, `SECONDARY_OUTPUT_RELOAD_CLASS' should be defined to return the
1392 largest register class required. If the requirements for input and output
1393 reloads are the same, the macro `SECONDARY_RELOAD_CLASS' should be used
1394 instead of defining both macros identically.
1396 The values returned by these macros are often `GENERAL_REGS'. Return
1397 `NO_REGS' if no spare register is needed; i.e., if X can be directly copied
1398 to or from a register of CLASS in MODE without requiring a scratch register.
1399 Do not define this macro if it would always return `NO_REGS'.
1401 If a scratch register is required (either with or without an intermediate
1402 register), you should define patterns for `reload_inM' or `reload_outM', as
1403 required.. These patterns, which will normally be implemented with a
1404 `define_expand', should be similar to the `movM' patterns, except that
1405 operand 2 is the scratch register.
1407 Define constraints for the reload register and scratch register that contain
1408 a single register class. If the original reload register (whose class is
1409 CLASS) can meet the constraint given in the pattern, the value returned by
1410 these macros is used for the class of the scratch register. Otherwise, two
1411 additional reload registers are required. Their classes are obtained from
1412 the constraints in the insn pattern.
1414 X might be a pseudo-register or a `subreg' of a pseudo-register, which could
1415 either be in a hard register or in memory. Use `true_regnum' to find out;
1416 it will return -1 if the pseudo is in memory and the hard register number if
1417 it is in a register.
1419 These macros should not be used in the case where a particular class of
1420 registers can only be copied to memory and not to another class of
1421 registers. In that case, secondary reload registers are not needed and
1422 would not be helpful. Instead, a stack location must be used to perform the
1423 copy and the `movM' pattern should use memory as a intermediate storage.
1424 This case often occurs between floating-point and general registers. */
1426 /* This chip has the interesting property that only the first eight
1427 registers can be moved to/from memory. */
1428 #define SECONDARY_RELOAD_CLASS(CLASS, MODE, X) \
1429 stormy16_secondary_reload_class (CLASS, MODE, X)
1431 /* #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) */
1432 /* #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) */
1434 /* Certain machines have the property that some registers cannot be copied to
1435 some other registers without using memory. Define this macro on those
1436 machines to be a C expression that is non-zero if objects of mode M in
1437 registers of CLASS1 can only be copied to registers of class CLASS2 by
1438 storing a register of CLASS1 into memory and loading that memory location
1439 into a register of CLASS2.
1441 Do not define this macro if its value would always be zero. */
1442 /* #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, M) */
1444 /* Normally when `SECONDARY_MEMORY_NEEDED' is defined, the compiler allocates a
1445 stack slot for a memory location needed for register copies. If this macro
1446 is defined, the compiler instead uses the memory location defined by this
1449 Do not define this macro if you do not define
1450 `SECONDARY_MEMORY_NEEDED'. */
1451 /* #define SECONDARY_MEMORY_NEEDED_RTX(MODE) */
1453 /* When the compiler needs a secondary memory location to copy between two
1454 registers of mode MODE, it normally allocates sufficient memory to hold a
1455 quantity of `BITS_PER_WORD' bits and performs the store and load operations
1456 in a mode that many bits wide and whose class is the same as that of MODE.
1458 This is right thing to do on most machines because it ensures that all bits
1459 of the register are copied and prevents accesses to the registers in a
1460 narrower mode, which some machines prohibit for floating-point registers.
1462 However, this default behavior is not correct on some machines, such as the
1463 DEC Alpha, that store short integers in floating-point registers differently
1464 than in integer registers. On those machines, the default widening will not
1465 work correctly and you must define this macro to suppress that widening in
1466 some cases. See the file `alpha.h' for details.
1468 Do not define this macro if you do not define `SECONDARY_MEMORY_NEEDED' or
1469 if widening MODE to a mode that is `BITS_PER_WORD' bits wide is correct for
1471 /* #define SECONDARY_MEMORY_NEEDED_MODE(MODE) */
1473 /* Normally the compiler avoids choosing registers that have been explicitly
1474 mentioned in the rtl as spill registers (these registers are normally those
1475 used to pass parameters and return values). However, some machines have so
1476 few registers of certain classes that there would not be enough registers to
1477 use as spill registers if this were done.
1479 Define `SMALL_REGISTER_CLASSES' to be an expression with a non-zero value on
1480 these machines. When this macro has a non-zero value, the compiler allows
1481 registers explicitly used in the rtl to be used as spill registers but
1482 avoids extending the lifetime of these registers.
1484 It is always safe to define this macro with a non-zero value, but if you
1485 unnecessarily define it, you will reduce the amount of optimizations that
1486 can be performed in some cases. If you do not define this macro with a
1487 non-zero value when it is required, the compiler will run out of spill
1488 registers and print a fatal error message. For most machines, you should
1489 not define this macro at all. */
1490 /* #define SMALL_REGISTER_CLASSES */
1492 /* A C expression whose value is nonzero if pseudos that have been assigned to
1493 registers of class CLASS would likely be spilled because registers of CLASS
1494 are needed for spill registers.
1496 The default value of this macro returns 1 if CLASS has exactly one register
1497 and zero otherwise. On most machines, this default should be used. Only
1498 define this macro to some other expression if pseudo allocated by
1499 `local-alloc.c' end up in memory because their hard registers were needed
1500 for spill registers. If this macro returns nonzero for those classes, those
1501 pseudos will only be allocated by `global.c', which knows how to reallocate
1502 the pseudo to another register. If there would not be another register
1503 available for reallocation, you should not change the definition of this
1504 macro since the only effect of such a definition would be to slow down
1505 register allocation. */
1506 /* #define CLASS_LIKELY_SPILLED_P(CLASS) */
1508 /* A C expression for the maximum number of consecutive registers of
1509 class CLASS needed to hold a value of mode MODE.
1511 This is closely related to the macro `HARD_REGNO_NREGS'. In fact, the value
1512 of the macro `CLASS_MAX_NREGS (CLASS, MODE)' should be the maximum value of
1513 `HARD_REGNO_NREGS (REGNO, MODE)' for all REGNO values in the class CLASS.
1515 This macro helps control the handling of multiple-word values in
1518 This declaration is required. */
1519 #define CLASS_MAX_NREGS(CLASS, MODE) \
1520 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
1522 /* If defined, a C expression for a class that contains registers which the
1523 compiler must always access in a mode that is the same size as the mode in
1524 which it loaded the register.
1526 For the example, loading 32-bit integer or floating-point objects into
1527 floating-point registers on the Alpha extends them to 64-bits. Therefore
1528 loading a 64-bit object and then storing it as a 32-bit object does not
1529 store the low-order 32-bits, as would be the case for a normal register.
1530 Therefore, `alpha.h' defines this macro as `FLOAT_REGS'. */
1531 /* #define CLASS_CANNOT_CHANGE_SIZE */
1533 /* A C expression that defines the machine-dependent operand constraint letters
1534 (`I', `J', `K', .. 'P') that specify particular ranges of integer values.
1535 If C is one of those letters, the expression should check that VALUE, an
1536 integer, is in the appropriate range and return 1 if so, 0 otherwise. If C
1537 is not one of those letters, the value should be 0 regardless of VALUE. */
1538 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
1539 ( (C) == 'I' ? (VALUE) >= 0 && (VALUE) <= 3 \
1540 : (C) == 'J' ? exact_log2 (VALUE) != -1 \
1541 : (C) == 'K' ? exact_log2 (~(VALUE)) != -1 \
1542 : (C) == 'L' ? (VALUE) >= 0 && (VALUE) <= 255 \
1543 : (C) == 'M' ? (VALUE) >= -255 && (VALUE) <= 0 \
1544 : (C) == 'N' ? (VALUE) >= -3 && (VALUE) <= 0 \
1545 : (C) == 'O' ? (VALUE) >= 1 && (VALUE) <= 4 \
1546 : (C) == 'P' ? (VALUE) >= -4 && (VALUE) <= -1 \
1549 /* A C expression that defines the machine-dependent operand constraint letters
1550 (`G', `H') that specify particular ranges of `const_double' values.
1552 If C is one of those letters, the expression should check that VALUE, an RTX
1553 of code `const_double', is in the appropriate range and return 1 if so, 0
1554 otherwise. If C is not one of those letters, the value should be 0
1555 regardless of VALUE.
1557 `const_double' is used for all floating-point constants and for `DImode'
1558 fixed-point constants. A given letter can accept either or both kinds of
1559 values. It can use `GET_MODE' to distinguish between these kinds. */
1560 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) 0
1562 /* A C expression that defines the optional machine-dependent constraint
1563 letters (`Q', `R', `S', `T', `U') that can be used to segregate specific
1564 types of operands, usually memory references, for the target machine.
1565 Normally this macro will not be defined. If it is required for a particular
1566 target machine, it should return 1 if VALUE corresponds to the operand type
1567 represented by the constraint letter C. If C is not defined as an extra
1568 constraint, the value returned should be 0 regardless of VALUE.
1570 For example, on the ROMP, load instructions cannot have their output in r0
1571 if the memory reference contains a symbolic address. Constraint letter `Q'
1572 is defined as representing a memory address that does *not* contain a
1573 symbolic address. An alternative is specified with a `Q' constraint on the
1574 input and `r' on the output. The next alternative specifies `m' on the
1575 input and a register class that does not include r0 on the output. */
1576 #define EXTRA_CONSTRAINT(VALUE, C) \
1577 stormy16_extra_constraint_p (VALUE, C)
1580 /* Basic Stack Layout */
1582 /* Define this macro if pushing a word onto the stack moves the stack pointer
1583 to a smaller address.
1585 When we say, "define this macro if ...," it means that the compiler checks
1586 this macro only with `#ifdef' so the precise definition used does not
1588 /* #define STACK_GROWS_DOWNWARD */
1590 /* We want to use post-increment instructions to push things on the stack,
1591 because we don't have any pre-increment ones. */
1592 #define STACK_PUSH_CODE POST_INC
1594 /* Define this macro if the addresses of local variable slots are at negative
1595 offsets from the frame pointer. */
1596 /* #define FRAME_GROWS_DOWNWARD */
1598 /* Define this macro if successive arguments to a function occupy decreasing
1599 addresses on the stack. */
1600 #define ARGS_GROW_DOWNWARD 1
1602 /* Offset from the frame pointer to the first local variable slot to be
1605 If `FRAME_GROWS_DOWNWARD', find the next slot's offset by
1606 subtracting the first slot's length from `STARTING_FRAME_OFFSET'.
1607 Otherwise, it is found by adding the length of the first slot to
1608 the value `STARTING_FRAME_OFFSET'. */
1609 #define STARTING_FRAME_OFFSET 0
1611 /* Offset from the stack pointer register to the first location at which
1612 outgoing arguments are placed. If not specified, the default value of zero
1613 is used. This is the proper value for most machines.
1615 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
1616 location at which outgoing arguments are placed. */
1617 /* #define STACK_POINTER_OFFSET */
1619 /* Offset from the argument pointer register to the first argument's address.
1620 On some machines it may depend on the data type of the function.
1622 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
1623 argument's address. */
1624 #define FIRST_PARM_OFFSET(FUNDECL) 0
1626 /* Offset from the stack pointer register to an item dynamically allocated on
1627 the stack, e.g., by `alloca'.
1629 The default value for this macro is `STACK_POINTER_OFFSET' plus the length
1630 of the outgoing arguments. The default is correct for most machines. See
1631 `function.c' for details. */
1632 /* #define STACK_DYNAMIC_OFFSET(FUNDECL) */
1634 /* A C expression whose value is RTL representing the address in a stack frame
1635 where the pointer to the caller's frame is stored. Assume that FRAMEADDR is
1636 an RTL expression for the address of the stack frame itself.
1638 If you don't define this macro, the default is to return the value of
1639 FRAMEADDR--that is, the stack frame address is also the address of the stack
1640 word that points to the previous frame. */
1641 /* #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) */
1643 /* If defined, a C expression that produces the machine-specific code to setup
1644 the stack so that arbitrary frames can be accessed. For example, on the
1645 Sparc, we must flush all of the register windows to the stack before we can
1646 access arbitrary stack frames. This macro will seldom need to be defined. */
1647 /* #define SETUP_FRAME_ADDRESSES() */
1649 /* A C expression whose value is RTL representing the value of the return
1650 address for the frame COUNT steps up from the current frame, after the
1651 prologue. FRAMEADDR is the frame pointer of the COUNT frame, or the frame
1652 pointer of the COUNT - 1 frame if `RETURN_ADDR_IN_PREVIOUS_FRAME' is
1655 The value of the expression must always be the correct address when COUNT is
1656 zero, but may be `NULL_RTX' if there is not way to determine the return
1657 address of other frames. */
1658 #define RETURN_ADDR_RTX(COUNT, FRAMEADDR) \
1660 ? gen_rtx_MEM (Pmode, arg_pointer_rtx) \
1663 /* Define this if the return address of a particular stack frame is
1664 accessed from the frame pointer of the previous stack frame. */
1665 /* #define RETURN_ADDR_IN_PREVIOUS_FRAME */
1667 /* A C expression whose value is RTL representing the location of the incoming
1668 return address at the beginning of any function, before the prologue. This
1669 RTL is either a `REG', indicating that the return value is saved in `REG',
1670 or a `MEM' representing a location in the stack.
1672 You only need to define this macro if you want to support call frame
1673 debugging information like that provided by DWARF 2. */
1674 #define INCOMING_RETURN_ADDR_RTX \
1675 gen_rtx_MEM (SImode, gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (-4)))
1677 /* A C expression whose value is an integer giving the offset, in bytes, from
1678 the value of the stack pointer register to the top of the stack frame at the
1679 beginning of any function, before the prologue. The top of the frame is
1680 defined to be the value of the stack pointer in the previous frame, just
1681 before the call instruction.
1683 You only need to define this macro if you want to support call frame
1684 debugging information like that provided by DWARF 2. */
1685 #define INCOMING_FRAME_SP_OFFSET (stormy16_interrupt_function_p () ? 6 : 4)
1688 /* Stack Checking. */
1690 /* A nonzero value if stack checking is done by the configuration files in a
1691 machine-dependent manner. You should define this macro if stack checking is
1692 require by the ABI of your machine or if you would like to have to stack
1693 checking in some more efficient way than GNU CC's portable approach. The
1694 default value of this macro is zero. */
1695 /* #define STACK_CHECK_BUILTIN */
1697 /* An integer representing the interval at which GNU CC must generate stack
1698 probe instructions. You will normally define this macro to be no larger
1699 than the size of the "guard pages" at the end of a stack area. The default
1700 value of 4096 is suitable for most systems. */
1701 /* #define STACK_CHECK_PROBE_INTERVAL */
1703 /* A integer which is nonzero if GNU CC should perform the stack probe as a
1704 load instruction and zero if GNU CC should use a store instruction. The
1705 default is zero, which is the most efficient choice on most systems. */
1706 /* #define STACK_CHECK_PROBE_LOAD */
1708 /* The number of bytes of stack needed to recover from a stack overflow, for
1709 languages where such a recovery is supported. The default value of 75 words
1710 should be adequate for most machines. */
1711 /* #define STACK_CHECK_PROTECT */
1713 /* The maximum size of a stack frame, in bytes. GNU CC will generate probe
1714 instructions in non-leaf functions to ensure at least this many bytes of
1715 stack are available. If a stack frame is larger than this size, stack
1716 checking will not be reliable and GNU CC will issue a warning. The default
1717 is chosen so that GNU CC only generates one instruction on most systems.
1718 You should normally not change the default value of this macro. */
1719 /* #define STACK_CHECK_MAX_FRAME_SIZE */
1721 /* GNU CC uses this value to generate the above warning message. It represents
1722 the amount of fixed frame used by a function, not including space for any
1723 callee-saved registers, temporaries and user variables. You need only
1724 specify an upper bound for this amount and will normally use the default of
1726 /* #define STACK_CHECK_FIXED_FRAME_SIZE */
1728 /* The maximum size, in bytes, of an object that GNU CC will place in the fixed
1729 area of the stack frame when the user specifies `-fstack-check'. GNU CC
1730 computed the default from the values of the above macros and you will
1731 normally not need to override that default. */
1732 /* #define STACK_CHECK_MAX_VAR_SIZE */
1735 /* Register That Address the Stack Frame. */
1737 /* The register number of the stack pointer register, which must also be a
1738 fixed register according to `FIXED_REGISTERS'. On most machines, the
1739 hardware determines which register this is. */
1740 #define STACK_POINTER_REGNUM 15
1742 /* The register number of the frame pointer register, which is used to access
1743 automatic variables in the stack frame. On some machines, the hardware
1744 determines which register this is. On other machines, you can choose any
1745 register you wish for this purpose. */
1746 #define FRAME_POINTER_REGNUM 17
1748 /* On some machines the offset between the frame pointer and starting offset of
1749 the automatic variables is not known until after register allocation has
1750 been done (for example, because the saved registers are between these two
1751 locations). On those machines, define `FRAME_POINTER_REGNUM' the number of
1752 a special, fixed register to be used internally until the offset is known,
1753 and define `HARD_FRAME_POINTER_REGNUM' to be actual the hard register number
1754 used for the frame pointer.
1756 You should define this macro only in the very rare circumstances when it is
1757 not possible to calculate the offset between the frame pointer and the
1758 automatic variables until after register allocation has been completed.
1759 When this macro is defined, you must also indicate in your definition of
1760 `ELIMINABLE_REGS' how to eliminate `FRAME_POINTER_REGNUM' into either
1761 `HARD_FRAME_POINTER_REGNUM' or `STACK_POINTER_REGNUM'.
1763 Do not define this macro if it would be the same as `FRAME_POINTER_REGNUM'. */
1764 #define HARD_FRAME_POINTER_REGNUM 13
1766 /* The register number of the arg pointer register, which is used to access the
1767 function's argument list. On some machines, this is the same as the frame
1768 pointer register. On some machines, the hardware determines which register
1769 this is. On other machines, you can choose any register you wish for this
1770 purpose. If this is not the same register as the frame pointer register,
1771 then you must mark it as a fixed register according to `FIXED_REGISTERS', or
1772 arrange to be able to eliminate it. */
1773 #define ARG_POINTER_REGNUM 18
1775 /* The register number of the return address pointer register, which is used to
1776 access the current function's return address from the stack. On some
1777 machines, the return address is not at a fixed offset from the frame pointer
1778 or stack pointer or argument pointer. This register can be defined to point
1779 to the return address on the stack, and then be converted by
1780 `ELIMINABLE_REGS' into either the frame pointer or stack pointer.
1782 Do not define this macro unless there is no other way to get the return
1783 address from the stack. */
1784 /* #define RETURN_ADDRESS_POINTER_REGNUM */
1786 /* Register numbers used for passing a function's static chain pointer. If
1787 register windows are used, the register number as seen by the called
1788 function is `STATIC_CHAIN_INCOMING_REGNUM', while the register number as
1789 seen by the calling function is `STATIC_CHAIN_REGNUM'. If these registers
1790 are the same, `STATIC_CHAIN_INCOMING_REGNUM' need not be defined.
1792 The static chain register need not be a fixed register.
1794 If the static chain is passed in memory, these macros should not be defined;
1795 instead, the next two macros should be defined. */
1796 #define STATIC_CHAIN_REGNUM 1
1797 /* #define STATIC_CHAIN_INCOMING_REGNUM */
1799 /* If the static chain is passed in memory, these macros provide rtx giving
1800 `mem' expressions that denote where they are stored. `STATIC_CHAIN' and
1801 `STATIC_CHAIN_INCOMING' give the locations as seen by the calling and called
1802 functions, respectively. Often the former will be at an offset from the
1803 stack pointer and the latter at an offset from the frame pointer.
1805 The variables `stack_pointer_rtx', `frame_pointer_rtx', and
1806 `arg_pointer_rtx' will have been initialized prior to the use of these
1807 macros and should be used to refer to those items.
1809 If the static chain is passed in a register, the two previous
1810 macros should be defined instead. */
1811 /* #define STATIC_CHAIN */
1812 /* #define STATIC_CHAIN_INCOMING */
1815 /* Eliminating the Frame Pointer and the Arg Pointer */
1817 /* A C expression which is nonzero if a function must have and use a frame
1818 pointer. This expression is evaluated in the reload pass. If its value is
1819 nonzero the function will have a frame pointer.
1821 The expression can in principle examine the current function and decide
1822 according to the facts, but on most machines the constant 0 or the constant
1823 1 suffices. Use 0 when the machine allows code to be generated with no
1824 frame pointer, and doing so saves some time or space. Use 1 when there is
1825 no possible advantage to avoiding a frame pointer.
1827 In certain cases, the compiler does not know how to produce valid code
1828 without a frame pointer. The compiler recognizes those cases and
1829 automatically gives the function a frame pointer regardless of what
1830 `FRAME_POINTER_REQUIRED' says. You don't need to worry about them.
1832 In a function that does not require a frame pointer, the frame pointer
1833 register can be allocated for ordinary usage, unless you mark it as a fixed
1834 register. See `FIXED_REGISTERS' for more information. */
1835 #define FRAME_POINTER_REQUIRED 0
1837 /* A C statement to store in the variable DEPTH_VAR the difference between the
1838 frame pointer and the stack pointer values immediately after the function
1839 prologue. The value would be computed from information such as the result
1840 of `get_frame_size ()' and the tables of registers `regs_ever_live' and
1843 If `ELIMINABLE_REGS' is defined, this macro will be not be used and need not
1844 be defined. Otherwise, it must be defined even if `FRAME_POINTER_REQUIRED'
1845 is defined to always be true; in that case, you may set DEPTH_VAR to
1847 /* #define INITIAL_FRAME_POINTER_OFFSET(DEPTH_VAR) */
1849 /* If defined, this macro specifies a table of register pairs used to eliminate
1850 unneeded registers that point into the stack frame. If it is not defined,
1851 the only elimination attempted by the compiler is to replace references to
1852 the frame pointer with references to the stack pointer.
1854 The definition of this macro is a list of structure initializations, each of
1855 which specifies an original and replacement register.
1858 #define ELIMINABLE_REGS \
1860 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1861 {FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \
1862 {ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1863 {ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \
1866 /* A C expression that returns non-zero if the compiler is allowed to try to
1867 replace register number FROM with register number TO. This macro need only
1868 be defined if `ELIMINABLE_REGS' is defined, and will usually be the constant
1869 1, since most of the cases preventing register elimination are things that
1870 the compiler already knows about. */
1872 #define CAN_ELIMINATE(FROM, TO) \
1873 ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \
1874 ? ! frame_pointer_needed \
1877 /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It specifies the
1878 initial difference between the specified pair of registers. This macro must
1879 be defined if `ELIMINABLE_REGS' is defined. */
1880 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1881 (OFFSET) = stormy16_initial_elimination_offset (FROM, TO)
1883 /* Define this macro if the `longjmp' function restores registers from the
1884 stack frames, rather than from those saved specifically by `setjmp'.
1885 Certain quantities must not be kept in registers across a call to `setjmp'
1886 on such machines. */
1887 /* #define LONGJMP_RESTORE_FROM_STACK */
1890 /* Passing Function Arguments on the Stack */
1892 /* Define this macro if an argument declared in a prototype as an integral type
1893 smaller than `int' should actually be passed as an `int'. In addition to
1894 avoiding errors in certain cases of mismatch, it also makes for better code
1895 on certain machines. */
1896 #define PROMOTE_PROTOTYPES 1
1898 /* A C expression that is the number of bytes actually pushed onto the stack
1899 when an instruction attempts to push NPUSHED bytes.
1901 If the target machine does not have a push instruction, do not define this
1902 macro. That directs GNU CC to use an alternate strategy: to allocate the
1903 entire argument block and then store the arguments into it.
1905 On some machines, the definition
1907 #define PUSH_ROUNDING(BYTES) (BYTES)
1909 will suffice. But on other machines, instructions that appear to push one
1910 byte actually push two bytes in an attempt to maintain alignment. Then the
1911 definition should be
1913 #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1) */
1914 #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1)
1916 /* If defined, the maximum amount of space required for outgoing arguments will
1917 be computed and placed into the variable
1918 `current_function_outgoing_args_size'. No space will be pushed onto the
1919 stack for each call; instead, the function prologue should increase the
1920 stack frame size by this amount.
1922 Defining both `PUSH_ROUNDING' and `ACCUMULATE_OUTGOING_ARGS' is not
1924 /* #define ACCUMULATE_OUTGOING_ARGS */
1926 /* Define this macro if functions should assume that stack space has been
1927 allocated for arguments even when their values are passed in registers.
1929 The value of this macro is the size, in bytes, of the area reserved for
1930 arguments passed in registers for the function represented by FNDECL.
1932 This space can be allocated by the caller, or be a part of the
1933 machine-dependent stack frame: `OUTGOING_REG_PARM_STACK_SPACE' says
1935 /* #define REG_PARM_STACK_SPACE(FNDECL) */
1937 /* Define these macros in addition to the one above if functions might allocate
1938 stack space for arguments even when their values are passed in registers.
1939 These should be used when the stack space allocated for arguments in
1940 registers is not a simple constant independent of the function declaration.
1942 The value of the first macro is the size, in bytes, of the area that we
1943 should initially assume would be reserved for arguments passed in registers.
1945 The value of the second macro is the actual size, in bytes, of the area that
1946 will be reserved for arguments passed in registers. This takes two
1947 arguments: an integer representing the number of bytes of fixed sized
1948 arguments on the stack, and a tree representing the number of bytes of
1949 variable sized arguments on the stack.
1951 When these macros are defined, `REG_PARM_STACK_SPACE' will only be called
1952 for libcall functions, the current function, or for a function being called
1953 when it is known that such stack space must be allocated. In each case this
1954 value can be easily computed.
1956 When deciding whether a called function needs such stack space, and how much
1957 space to reserve, GNU CC uses these two macros instead of
1958 `REG_PARM_STACK_SPACE'. */
1959 /* #define MAYBE_REG_PARM_STACK_SPACE */
1960 /* #define FINAL_REG_PARM_STACK_SPACE(CONST_SIZE, VAR_SIZE) */
1962 /* Define this if it is the responsibility of the caller to allocate the area
1963 reserved for arguments passed in registers.
1965 If `ACCUMULATE_OUTGOING_ARGS' is defined, this macro controls whether the
1966 space for these arguments counts in the value of
1967 `current_function_outgoing_args_size'. */
1968 /* #define OUTGOING_REG_PARM_STACK_SPACE */
1970 /* Define this macro if `REG_PARM_STACK_SPACE' is defined, but the stack
1971 parameters don't skip the area specified by it.
1973 Normally, when a parameter is not passed in registers, it is placed on the
1974 stack beyond the `REG_PARM_STACK_SPACE' area. Defining this macro
1975 suppresses this behavior and causes the parameter to be passed on the stack
1976 in its natural location. */
1977 /* #define STACK_PARMS_IN_REG_PARM_AREA */
1979 /* A C expression that should indicate the number of bytes of its own arguments
1980 that a function pops on returning, or 0 if the function pops no arguments
1981 and the caller must therefore pop them all after the function returns.
1983 FUNDECL is a C variable whose value is a tree node that describes the
1984 function in question. Normally it is a node of type `FUNCTION_DECL' that
1985 describes the declaration of the function. From this it is possible to
1986 obtain the DECL_ATTRIBUTES of the function.
1988 FUNTYPE is a C variable whose value is a tree node that describes the
1989 function in question. Normally it is a node of type `FUNCTION_TYPE' that
1990 describes the data type of the function. From this it is possible to obtain
1991 the data types of the value and arguments (if known).
1993 When a call to a library function is being considered, FUNTYPE will contain
1994 an identifier node for the library function. Thus, if you need to
1995 distinguish among various library functions, you can do so by their names.
1996 Note that "library function" in this context means a function used to
1997 perform arithmetic, whose name is known specially in the compiler and was
1998 not mentioned in the C code being compiled.
2000 STACK-SIZE is the number of bytes of arguments passed on the stack. If a
2001 variable number of bytes is passed, it is zero, and argument popping will
2002 always be the responsibility of the calling function.
2004 On the Vax, all functions always pop their arguments, so the definition of
2005 this macro is STACK-SIZE. On the 68000, using the standard calling
2006 convention, no functions pop their arguments, so the value of the macro is
2007 always 0 in this case. But an alternative calling convention is available
2008 in which functions that take a fixed number of arguments pop them but other
2009 functions (such as `printf') pop nothing (the caller pops all). When this
2010 convention is in use, FUNTYPE is examined to determine whether a function
2011 takes a fixed number of arguments. */
2012 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0
2015 /* Function Arguments in Registers */
2017 #define NUM_ARGUMENT_REGISTERS 6
2018 #define FIRST_ARGUMENT_REGISTER 2
2020 #define STORMY16_WORD_SIZE(TYPE, MODE) \
2021 ((((TYPE) ? int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE)) \
2025 /* A C expression that controls whether a function argument is passed in a
2026 register, and which register.
2028 The arguments are CUM, of type CUMULATIVE_ARGS, which summarizes
2029 (in a way defined by INIT_CUMULATIVE_ARGS and FUNCTION_ARG_ADVANCE)
2030 all of the previous arguments so far passed in registers; MODE, the
2031 machine mode of the argument; TYPE, the data type of the argument
2032 as a tree node or 0 if that is not known (which happens for C
2033 support library functions); and NAMED, which is 1 for an ordinary
2034 argument and 0 for nameless arguments that correspond to `...' in
2035 the called function's prototype.
2037 The value of the expression should either be a `reg' RTX for the hard
2038 register in which to pass the argument, or zero to pass the argument on the
2041 For machines like the Vax and 68000, where normally all arguments are
2042 pushed, zero suffices as a definition.
2044 The usual way to make the ANSI library `stdarg.h' work on a machine where
2045 some arguments are usually passed in registers, is to cause nameless
2046 arguments to be passed on the stack instead. This is done by making
2047 `FUNCTION_ARG' return 0 whenever NAMED is 0.
2049 You may use the macro `MUST_PASS_IN_STACK (MODE, TYPE)' in the definition of
2050 this macro to determine if this argument is of a type that must be passed in
2051 the stack. If `REG_PARM_STACK_SPACE' is not defined and `FUNCTION_ARG'
2052 returns non-zero for such an argument, the compiler will abort. If
2053 `REG_PARM_STACK_SPACE' is defined, the argument will be computed in the
2054 stack and then loaded into a register. */
2055 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
2056 ((MODE) == VOIDmode ? const0_rtx \
2057 : (CUM) + STORMY16_WORD_SIZE (TYPE, MODE) > NUM_ARGUMENT_REGISTERS ? 0 \
2058 : gen_rtx_REG (MODE, (CUM) + 2))
2060 /* Define this macro if the target machine has "register windows", so that the
2061 register in which a function sees an arguments is not necessarily the same
2062 as the one in which the caller passed the argument.
2064 For such machines, `FUNCTION_ARG' computes the register in which the caller
2065 passes the value, and `FUNCTION_INCOMING_ARG' should be defined in a similar
2066 fashion to tell the function being called where the arguments will arrive.
2068 If `FUNCTION_INCOMING_ARG' is not defined, `FUNCTION_ARG' serves both
2070 /* #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) */
2072 /* A C expression for the number of words, at the beginning of an argument,
2073 must be put in registers. The value must be zero for arguments that are
2074 passed entirely in registers or that are entirely pushed on the stack.
2076 On some machines, certain arguments must be passed partially in registers
2077 and partially in memory. On these machines, typically the first N words of
2078 arguments are passed in registers, and the rest on the stack. If a
2079 multi-word argument (a `double' or a structure) crosses that boundary, its
2080 first few words must be passed in registers and the rest must be pushed.
2081 This macro tells the compiler when this occurs, and how many of the words
2082 should go in registers.
2084 `FUNCTION_ARG' for these arguments should return the first register to be
2085 used by the caller for this argument; likewise `FUNCTION_INCOMING_ARG', for
2086 the called function. */
2087 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) 0
2089 /* A C expression that indicates when an argument must be passed by reference.
2090 If nonzero for an argument, a copy of that argument is made in memory and a
2091 pointer to the argument is passed instead of the argument itself. The
2092 pointer is passed in whatever way is appropriate for passing a pointer to
2095 On machines where `REG_PARM_STACK_SPACE' is not defined, a suitable
2096 definition of this macro might be
2097 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
2098 MUST_PASS_IN_STACK (MODE, TYPE) */
2099 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) 0
2101 /* If defined, a C expression that indicates when it is more
2102 desirable to keep an argument passed by invisible reference as a
2103 reference, rather than copying it to a pseudo register. */
2104 /* #define FUNCTION_ARG_KEEP_AS_REFERENCE(CUM, MODE, TYPE, NAMED) */
2106 /* If defined, a C expression that indicates when it is the called function's
2107 responsibility to make a copy of arguments passed by invisible reference.
2108 Normally, the caller makes a copy and passes the address of the copy to the
2109 routine being called. When FUNCTION_ARG_CALLEE_COPIES is defined and is
2110 nonzero, the caller does not make a copy. Instead, it passes a pointer to
2111 the "live" value. The called function must not modify this value. If it
2112 can be determined that the value won't be modified, it need not make a copy;
2113 otherwise a copy must be made. */
2114 /* #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) */
2116 /* A C type for declaring a variable that is used as the first argument of
2117 `FUNCTION_ARG' and other related values. For some target machines, the type
2118 `int' suffices and can hold the number of bytes of argument so far.
2120 There is no need to record in `CUMULATIVE_ARGS' anything about the arguments
2121 that have been passed on the stack. The compiler has other variables to
2122 keep track of that. For target machines on which all arguments are passed
2123 on the stack, there is no need to store anything in `CUMULATIVE_ARGS';
2124 however, the data structure must exist and should not be empty, so use
2127 For this platform, the value of CUMULATIVE_ARGS is the number of words
2128 of arguments that have been passed in registers so far. */
2129 typedef int CUMULATIVE_ARGS;
2131 /* A C statement (sans semicolon) for initializing the variable CUM for the
2132 state at the beginning of the argument list. The variable has type
2133 `CUMULATIVE_ARGS'. The value of FNTYPE is the tree node for the data type
2134 of the function which will receive the args, or 0 if the args are to a
2135 compiler support library function. The value of INDIRECT is nonzero when
2136 processing an indirect call, for example a call through a function pointer.
2137 The value of INDIRECT is zero for a call to an explicitly named function, a
2138 library function call, or when `INIT_CUMULATIVE_ARGS' is used to find
2139 arguments for the function being compiled.
2141 When processing a call to a compiler support library function, LIBNAME
2142 identifies which one. It is a `symbol_ref' rtx which contains the name of
2143 the function, as a string. LIBNAME is 0 when an ordinary C function call is
2144 being processed. Thus, each time this macro is called, either LIBNAME or
2145 FNTYPE is nonzero, but never both of them at once. */
2146 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) (CUM) = 0
2148 /* Like `INIT_CUMULATIVE_ARGS' but overrides it for the purposes of finding the
2149 arguments for the function being compiled. If this macro is undefined,
2150 `INIT_CUMULATIVE_ARGS' is used instead.
2152 The value passed for LIBNAME is always 0, since library routines with
2153 special calling conventions are never compiled with GNU CC. The argument
2154 LIBNAME exists for symmetry with `INIT_CUMULATIVE_ARGS'. */
2155 /* #define INIT_CUMULATIVE_INCOMING_ARGS(CUM, FNTYPE, LIBNAME) */
2157 /* A C statement (sans semicolon) to update the summarizer variable CUM to
2158 advance past an argument in the argument list. The values MODE, TYPE and
2159 NAMED describe that argument. Once this is done, the variable CUM is
2160 suitable for analyzing the *following* argument with `FUNCTION_ARG', etc.
2162 This macro need not do anything if the argument in question was passed on
2163 the stack. The compiler knows how to track the amount of stack space used
2164 for arguments without any special help. */
2165 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
2166 ((CUM) = stormy16_function_arg_advance (CUM, MODE, TYPE, NAMED))
2168 /* If defined, a C expression which determines whether, and in which direction,
2169 to pad out an argument with extra space. The value should be of type `enum
2170 direction': either `upward' to pad above the argument, `downward' to pad
2171 below, or `none' to inhibit padding.
2173 The *amount* of padding is always just enough to reach the next multiple of
2174 `FUNCTION_ARG_BOUNDARY'; this macro does not control it.
2176 This macro has a default definition which is right for most systems. For
2177 little-endian machines, the default is to pad upward. For big-endian
2178 machines, the default is to pad downward for an argument of constant size
2179 shorter than an `int', and upward otherwise. */
2180 /* #define FUNCTION_ARG_PADDING(MODE, TYPE) */
2182 /* If defined, a C expression that gives the alignment boundary, in bits, of an
2183 argument with the specified mode and type. If it is not defined,
2184 `PARM_BOUNDARY' is used for all arguments. */
2185 /* #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) */
2187 /* A C expression that is nonzero if REGNO is the number of a hard register in
2188 which function arguments are sometimes passed. This does *not* include
2189 implicit arguments such as the static chain and the structure-value address.
2190 On many machines, no registers can be used for this purpose since all
2191 function arguments are pushed on the stack. */
2192 #define FUNCTION_ARG_REGNO_P(REGNO) \
2193 ((REGNO) >= FIRST_ARGUMENT_REGISTER \
2194 && (REGNO) < FIRST_ARGUMENT_REGISTER + NUM_ARGUMENT_REGISTERS)
2197 /* How Scalar Function Values are Returned */
2199 /* The number of the hard register that is used to return a scalar value from a
2201 #define RETURN_VALUE_REGNUM FIRST_ARGUMENT_REGISTER
2203 /* Define this macro if `-traditional' should not cause functions declared to
2204 return `float' to convert the value to `double'. */
2205 /* #define TRADITIONAL_RETURN_FLOAT */
2207 /* A C expression to create an RTX representing the place where a function
2208 returns a value of data type VALTYPE. VALTYPE is a tree node representing a
2209 data type. Write `TYPE_MODE (VALTYPE)' to get the machine mode used to
2210 represent that type. On many machines, only the mode is relevant.
2211 (Actually, on most machines, scalar values are returned in the same place
2212 regardless of mode).
2214 If `PROMOTE_FUNCTION_RETURN' is defined, you must apply the same promotion
2215 rules specified in `PROMOTE_MODE' if VALTYPE is a scalar type.
2217 If the precise function being called is known, FUNC is a tree node
2218 (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This makes it
2219 possible to use a different value-returning convention for specific
2220 functions when all their calls are known.
2222 `FUNCTION_VALUE' is not used for return vales with aggregate data types,
2223 because these are returned in another way. See `STRUCT_VALUE_REGNUM' and
2224 related macros, below. */
2225 #define FUNCTION_VALUE(VALTYPE, FUNC) \
2226 stormy16_function_value (VALTYPE, FUNC)
2229 /* Define this macro if the target machine has "register windows" so that the
2230 register in which a function returns its value is not the same as the one in
2231 which the caller sees the value.
2233 For such machines, `FUNCTION_VALUE' computes the register in which the
2234 caller will see the value. `FUNCTION_OUTGOING_VALUE' should be defined in a
2235 similar fashion to tell the function where to put the value.
2237 If `FUNCTION_OUTGOING_VALUE' is not defined, `FUNCTION_VALUE' serves both
2240 `FUNCTION_OUTGOING_VALUE' is not used for return vales with aggregate data
2241 types, because these are returned in another way. See `STRUCT_VALUE_REGNUM'
2242 and related macros, below. */
2243 /* #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) */
2245 /* A C expression to create an RTX representing the place where a library
2246 function returns a value of mode MODE.
2248 Note that "library function" in this context means a compiler support
2249 routine, used to perform arithmetic, whose name is known specially by the
2250 compiler and was not mentioned in the C code being compiled.
2252 The definition of `LIBRARY_VALUE' need not be concerned aggregate data
2253 types, because none of the library functions returns such types. */
2254 #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, RETURN_VALUE_REGNUM)
2256 /* A C expression that is nonzero if REGNO is the number of a hard register in
2257 which the values of called function may come back.
2259 A register whose use for returning values is limited to serving as the
2260 second of a pair (for a value of type `double', say) need not be recognized
2261 by this macro. So for most machines, this definition suffices:
2263 #define FUNCTION_VALUE_REGNO_P(N) ((N) == RETURN)
2265 If the machine has register windows, so that the caller and the called
2266 function use different registers for the return value, this macro should
2267 recognize only the caller's register numbers. */
2268 #define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == RETURN_VALUE_REGNUM)
2270 /* Define this macro if `untyped_call' and `untyped_return' need more space
2271 than is implied by `FUNCTION_VALUE_REGNO_P' for saving and restoring an
2272 arbitrary return value. */
2273 /* #define APPLY_RESULT_SIZE */
2276 /* How Large Values are Returned */
2278 /* A C expression which can inhibit the returning of certain function values in
2279 registers, based on the type of value. A nonzero value says to return the
2280 function value in memory, just as large structures are always returned.
2281 Here TYPE will be a C expression of type `tree', representing the data type
2284 Note that values of mode `BLKmode' must be explicitly handled by this macro.
2285 Also, the option `-fpcc-struct-return' takes effect regardless of this
2286 macro. On most systems, it is possible to leave the macro undefined; this
2287 causes a default definition to be used, whose value is the constant 1 for
2288 `BLKmode' values, and 0 otherwise.
2290 Do not use this macro to indicate that structures and unions should always
2291 be returned in memory. You should instead use `DEFAULT_PCC_STRUCT_RETURN'
2292 to indicate this. */
2293 #define RETURN_IN_MEMORY(TYPE) \
2294 (int_size_in_bytes (TYPE) > UNITS_PER_WORD * NUM_ARGUMENT_REGISTERS)
2296 /* Define this macro to be 1 if all structure and union return values must be
2297 in memory. Since this results in slower code, this should be defined only
2298 if needed for compatibility with other compilers or with an ABI. If you
2299 define this macro to be 0, then the conventions used for structure and union
2300 return values are decided by the `RETURN_IN_MEMORY' macro.
2302 If not defined, this defaults to the value 1. */
2303 /* #define DEFAULT_PCC_STRUCT_RETURN 0 */
2305 /* If the structure value address is passed in a register, then
2306 `STRUCT_VALUE_REGNUM' should be the number of that register. */
2307 /* #define STRUCT_VALUE_REGNUM */
2309 /* If the structure value address is not passed in a register, define
2310 `STRUCT_VALUE' as an expression returning an RTX for the place where the
2311 address is passed. If it returns 0, the address is passed as an "invisible"
2313 #define STRUCT_VALUE 0
2315 /* On some architectures the place where the structure value address is found
2316 by the called function is not the same place that the caller put it. This
2317 can be due to register windows, or it could be because the function prologue
2318 moves it to a different place.
2320 If the incoming location of the structure value address is in a register,
2321 define this macro as the register number. */
2322 /* #define STRUCT_VALUE_INCOMING_REGNUM */
2324 /* If the incoming location is not a register, then you should define
2325 `STRUCT_VALUE_INCOMING' as an expression for an RTX for where the called
2326 function should find the value. If it should find the value on the stack,
2327 define this to create a `mem' which refers to the frame pointer. A
2328 definition of 0 means that the address is passed as an "invisible" first
2330 /* #define STRUCT_VALUE_INCOMING */
2332 /* Define this macro if the usual system convention on the target machine for
2333 returning structures and unions is for the called function to return the
2334 address of a static variable containing the value.
2336 Do not define this if the usual system convention is for the caller to pass
2337 an address to the subroutine.
2339 This macro has effect in `-fpcc-struct-return' mode, but it does nothing
2340 when you use `-freg-struct-return' mode. */
2341 /* #define PCC_STATIC_STRUCT_RETURN */
2344 /* Caller-Saves Register Allocation */
2346 /* Define this macro if function calls on the target machine do not preserve
2347 any registers; in other words, if `CALL_USED_REGISTERS' has 1 for all
2348 registers. This macro enables `-fcaller-saves' by default. Eventually that
2349 option will be enabled by default on all machines and both the option and
2350 this macro will be eliminated. */
2351 /* #define DEFAULT_CALLER_SAVES */
2353 /* A C expression to determine whether it is worthwhile to consider placing a
2354 pseudo-register in a call-clobbered hard register and saving and restoring
2355 it around each function call. The expression should be 1 when this is worth
2356 doing, and 0 otherwise.
2358 If you don't define this macro, a default is used which is good on most
2359 machines: `4 * CALLS < REFS'. */
2360 /* #define CALLER_SAVE_PROFITABLE(REFS, CALLS) */
2363 /* Function Entry and Exit */
2365 /* Define this macro as a C expression that is nonzero if the return
2366 instruction or the function epilogue ignores the value of the stack pointer;
2367 in other words, if it is safe to delete an instruction to adjust the stack
2368 pointer before a return from the function.
2370 Note that this macro's value is relevant only for functions for which frame
2371 pointers are maintained. It is never safe to delete a final stack
2372 adjustment in a function that has no frame pointer, and the compiler knows
2373 this regardless of `EXIT_IGNORE_STACK'. */
2374 /* #define EXIT_IGNORE_STACK */
2376 /* Define this macro as a C expression that is nonzero for registers
2377 are used by the epilogue or the `return' pattern. The stack and
2378 frame pointer registers are already be assumed to be used as
2380 #define EPILOGUE_USES(REGNO) \
2381 stormy16_epilogue_uses (REGNO)
2383 /* Define this macro if the function epilogue contains delay slots to which
2384 instructions from the rest of the function can be "moved". The definition
2385 should be a C expression whose value is an integer representing the number
2386 of delay slots there. */
2387 /* #define DELAY_SLOTS_FOR_EPILOGUE */
2389 /* A C expression that returns 1 if INSN can be placed in delay slot number N
2392 The argument N is an integer which identifies the delay slot now being
2393 considered (since different slots may have different rules of eligibility).
2394 It is never negative and is always less than the number of epilogue delay
2395 slots (what `DELAY_SLOTS_FOR_EPILOGUE' returns). If you reject a particular
2396 insn for a given delay slot, in principle, it may be reconsidered for a
2397 subsequent delay slot. Also, other insns may (at least in principle) be
2398 considered for the so far unfilled delay slot.
2400 The insns accepted to fill the epilogue delay slots are put in an
2401 RTL list made with `insn_list' objects, stored in the variable
2402 `current_function_epilogue_delay_list'. The insn for the first
2403 delay slot comes first in the list. Your definition of the macro
2404 `FUNCTION_EPILOGUE' should fill the delay slots by outputting the
2405 insns in this list, usually by calling `final_scan_insn'.
2407 You need not define this macro if you did not define
2408 `DELAY_SLOTS_FOR_EPILOGUE'. */
2409 /* #define ELIGIBLE_FOR_EPILOGUE_DELAY(INSN, N) */
2411 /* A C compound statement that outputs the assembler code for a thunk function,
2412 used to implement C++ virtual function calls with multiple inheritance. The
2413 thunk acts as a wrapper around a virtual function, adjusting the implicit
2414 object parameter before handing control off to the real function.
2416 First, emit code to add the integer DELTA to the location that contains the
2417 incoming first argument. Assume that this argument contains a pointer, and
2418 is the one used to pass the `this' pointer in C++. This is the incoming
2419 argument *before* the function prologue, e.g. `%o0' on a sparc. The
2420 addition must preserve the values of all other incoming arguments.
2422 After the addition, emit code to jump to FUNCTION, which is a
2423 `FUNCTION_DECL'. This is a direct pure jump, not a call, and does not touch
2424 the return address. Hence returning from FUNCTION will return to whoever
2425 called the current `thunk'.
2427 The effect must be as if @var{function} had been called directly
2428 with the adjusted first argument. This macro is responsible for
2429 emitting all of the code for a thunk function;
2430 TARGET_ASM_FUNCTION_PROLOGUE and TARGET_ASM_FUNCTION_EPILOGUE are
2433 The THUNK_FNDECL is redundant. (DELTA and FUNCTION have already been
2434 extracted from it.) It might possibly be useful on some targets, but
2437 If you do not define this macro, the target-independent code in the C++
2438 frontend will generate a less efficient heavyweight thunk that calls
2439 FUNCTION instead of jumping to it. The generic approach does not support
2441 #define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) \
2443 fprintf (FILE, "\tadd r2,#0x%x\n", (DELTA) & 0xFFFF); \
2444 fputs ("\tjmpf ", FILE); \
2445 assemble_name (FILE, XSTR (XEXP (DECL_RTL (function), 0), 0)); \
2446 putc ('\n', FILE); \
2450 /* Generating Code for Profiling. */
2452 /* A C statement or compound statement to output to FILE some assembler code to
2453 call the profiling subroutine `mcount'. Before calling, the assembler code
2454 must load the address of a counter variable into a register where `mcount'
2455 expects to find the address. The name of this variable is `LP' followed by
2456 the number LABELNO, so you would generate the name using `LP%d' in a
2459 The details of how the address should be passed to `mcount' are determined
2460 by your operating system environment, not by GNU CC. To figure them out,
2461 compile a small program for profiling using the system's installed C
2462 compiler and look at the assembler code that results.
2464 This declaration must be present, but it can be an abort if profiling is
2467 #define FUNCTION_PROFILER(FILE, LABELNO) abort ()
2469 /* Define this macro if the code for function profiling should come before the
2470 function prologue. Normally, the profiling code comes after. */
2471 /* #define PROFILE_BEFORE_PROLOGUE */
2473 /* A C statement or compound statement to output to FILE some assembler code to
2474 initialize basic-block profiling for the current object module. The global
2475 compile flag `profile_block_flag' distingishes two profile modes.
2477 profile_block_flag != 2'
2478 Output code to call the subroutine `__bb_init_func' once per
2479 object module, passing it as its sole argument the address of
2480 a block allocated in the object module.
2482 The name of the block is a local symbol made with this
2485 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 0);
2487 Of course, since you are writing the definition of
2488 `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro,
2489 you can take a short cut in the definition of this macro and
2490 use the name that you know will result.
2492 The first word of this block is a flag which will be nonzero
2493 if the object module has already been initialized. So test
2494 this word first, and do not call `__bb_init_func' if the flag
2495 is nonzero. BLOCK_OR_LABEL contains a unique number which
2496 may be used to generate a label as a branch destination when
2497 `__bb_init_func' will not be called.
2499 Described in assembler language, the code to be output looks
2508 profile_block_flag == 2'
2509 Output code to call the subroutine `__bb_init_trace_func' and
2510 pass two parameters to it. The first parameter is the same as
2511 for `__bb_init_func'. The second parameter is the number of
2512 the first basic block of the function as given by
2513 BLOCK_OR_LABEL. Note that `__bb_init_trace_func' has to be
2514 called, even if the object module has been initialized
2517 Described in assembler language, the code to be output looks
2520 parameter2 <- BLOCK_OR_LABEL
2521 call __bb_init_trace_func */
2522 /* #define FUNCTION_BLOCK_PROFILER (FILE, LABELNO) */
2524 /* A C statement or compound statement to output to FILE some assembler code to
2525 increment the count associated with the basic block number BLOCKNO. The
2526 global compile flag `profile_block_flag' distingishes two profile modes.
2528 profile_block_flag != 2'
2529 Output code to increment the counter directly. Basic blocks
2530 are numbered separately from zero within each compilation.
2531 The count associated with block number BLOCKNO is at index
2532 BLOCKNO in a vector of words; the name of this array is a
2533 local symbol made with this statement:
2535 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 2);
2537 Of course, since you are writing the definition of
2538 `ASM_GENERATE_INTERNAL_LABEL' as well as that of this macro,
2539 you can take a short cut in the definition of this macro and
2540 use the name that you know will result.
2542 Described in assembler language, the code to be output looks
2545 inc (LPBX2+4*BLOCKNO)
2547 profile_block_flag == 2'
2548 Output code to initialize the global structure `__bb' and
2549 call the function `__bb_trace_func', which will increment the
2552 `__bb' consists of two words. In the first word, the current
2553 basic block number, as given by BLOCKNO, has to be stored. In
2554 the second word, the address of a block allocated in the
2555 object module has to be stored. The address is given by the
2556 label created with this statement:
2558 ASM_GENERATE_INTERNAL_LABEL (BUFFER, "LPBX", 0);
2560 Described in assembler language, the code to be output looks
2562 move BLOCKNO -> (__bb)
2563 move LPBX0 -> (__bb+4)
2564 call __bb_trace_func */
2565 /* #define BLOCK_PROFILER(FILE, BLOCKNO) */
2567 /* A C statement or compound statement to output to FILE assembler
2568 code to call function `__bb_trace_ret'. The assembler code should
2569 only be output if the global compile flag `profile_block_flag' ==
2570 2. This macro has to be used at every place where code for
2571 returning from a function is generated
2572 (e.g. `TARGET_ASM_FUNCTION_EPILOGUE'). Although you have to write
2573 the definition of `TARGET_ASM_FUNCTION_EPILOGUE' as well, you have
2574 to define this macro to tell the compiler, that the proper call to
2575 `__bb_trace_ret' is produced. */
2576 /* #define FUNCTION_BLOCK_PROFILER_EXIT(FILE) */
2578 /* A C statement or compound statement to save all registers, which may be
2579 clobbered by a function call, including condition codes. The `asm'
2580 statement will be mostly likely needed to handle this task. Local labels in
2581 the assembler code can be concatenated with the string ID, to obtain a
2584 Registers or condition codes clobbered by
2585 `TARGET_ASM_FUNCTION_PROLOGUE' or `TARGET_ASM_FUNCTION_EPILOGUE'
2586 must be saved in the macros `FUNCTION_BLOCK_PROFILER',
2587 `FUNCTION_BLOCK_PROFILER_EXIT' and `BLOCK_PROFILER' prior calling
2588 `__bb_init_trace_func', `__bb_trace_ret' and `__bb_trace_func'
2590 /* #define MACHINE_STATE_SAVE(ID) */
2592 /* A C statement or compound statement to restore all registers, including
2593 condition codes, saved by `MACHINE_STATE_SAVE'.
2595 Registers or condition codes clobbered by `TARGET_ASM_FUNCTION_PROLOGUE' or
2596 `TARGET_ASM_FUNCTION_EPILOGUE' must be restored in the macros
2597 `FUNCTION_BLOCK_PROFILER', `FUNCTION_BLOCK_PROFILER_EXIT' and
2598 `BLOCK_PROFILER' after calling `__bb_init_trace_func', `__bb_trace_ret' and
2599 `__bb_trace_func' respectively. */
2600 /* #define MACHINE_STATE_RESTORE(ID) */
2602 /* A C function or functions which are needed in the library to support block
2604 /* #define BLOCK_PROFILER_CODE */
2607 /* If the target has particular reasons why a function cannot be inlined,
2608 it may define the TARGET_CANNOT_INLINE_P. This macro takes one argument,
2609 the DECL describing the function. The function should NULL if the function
2610 *can* be inlined. Otherwise it should return a pointer to a string containing
2611 a message describing why the function could not be inlined. The message will
2612 displayed if the '-Winline' command line switch has been given. If the message
2613 contains a '%s' sequence, this will be replaced by the name of the function. */
2614 /* #define TARGET_CANNOT_INLINE_P(FN_DECL) stormy16_cannot_inline_p (FN_DECL) */
2616 /* Implementing the Varargs Macros. */
2618 /* If defined, is a C expression that produces the machine-specific code for a
2619 call to `__builtin_saveregs'. This code will be moved to the very beginning
2620 of the function, before any parameter access are made. The return value of
2621 this function should be an RTX that contains the value to use as the return
2622 of `__builtin_saveregs'.
2624 If this macro is not defined, the compiler will output an ordinary call to
2625 the library function `__builtin_saveregs'. */
2626 /* #define EXPAND_BUILTIN_SAVEREGS() */
2628 /* This macro offers an alternative to using `__builtin_saveregs' and defining
2629 the macro `EXPAND_BUILTIN_SAVEREGS'. Use it to store the anonymous register
2630 arguments into the stack so that all the arguments appear to have been
2631 passed consecutively on the stack. Once this is done, you can use the
2632 standard implementation of varargs that works for machines that pass all
2633 their arguments on the stack.
2635 The argument ARGS_SO_FAR is the `CUMULATIVE_ARGS' data structure, containing
2636 the values that obtain after processing of the named arguments. The
2637 arguments MODE and TYPE describe the last named argument--its machine mode
2638 and its data type as a tree node.
2640 The macro implementation should do two things: first, push onto the stack
2641 all the argument registers *not* used for the named arguments, and second,
2642 store the size of the data thus pushed into the `int'-valued variable whose
2643 name is supplied as the argument PRETEND_ARGS_SIZE. The value that you
2644 store here will serve as additional offset for setting up the stack frame.
2646 Because you must generate code to push the anonymous arguments at compile
2647 time without knowing their data types, `SETUP_INCOMING_VARARGS' is only
2648 useful on machines that have just a single category of argument register and
2649 use it uniformly for all data types.
2651 If the argument SECOND_TIME is nonzero, it means that the arguments of the
2652 function are being analyzed for the second time. This happens for an inline
2653 function, which is not actually compiled until the end of the source file.
2654 The macro `SETUP_INCOMING_VARARGS' should not generate any instructions in
2656 #define SETUP_INCOMING_VARARGS(ARGS_SO_FAR, MODE, TYPE, PRETEND_ARGS_SIZE, SECOND_TIME) \
2657 if (! SECOND_TIME) \
2658 stormy16_setup_incoming_varargs (ARGS_SO_FAR, MODE, TYPE, & PRETEND_ARGS_SIZE)
2660 /* Define this macro if the location where a function argument is passed
2661 depends on whether or not it is a named argument.
2663 This macro controls how the NAMED argument to `FUNCTION_ARG' is set for
2664 varargs and stdarg functions. With this macro defined, the NAMED argument
2665 is always true for named arguments, and false for unnamed arguments. If
2666 this is not defined, but `SETUP_INCOMING_VARARGS' is defined, then all
2667 arguments are treated as named. Otherwise, all named arguments except the
2668 last are treated as named. */
2669 /* #define STRICT_ARGUMENT_NAMING 1 */
2671 /* Build up the stdarg/varargs va_list type tree, assinging it to NODE. If not
2672 defined, it is assumed that va_list is a void * pointer. */
2673 #define BUILD_VA_LIST_TYPE(NODE) \
2674 ((NODE) = stormy16_build_va_list ())
2676 /* Implement the stdarg/varargs va_start macro. STDARG_P is non-zero if this
2677 is stdarg.h instead of varargs.h. VALIST is the tree of the va_list
2678 variable to initialize. NEXTARG is the machine independent notion of the
2679 'next' argument after the variable arguments. If not defined, a standard
2680 implementation will be defined that works for arguments passed on the stack. */
2681 #define EXPAND_BUILTIN_VA_START(STDARG_P, VALIST, NEXTARG) \
2682 stormy16_expand_builtin_va_start (STDARG_P, VALIST, NEXTARG)
2684 /* Implement the stdarg/varargs va_arg macro. VALIST is the variable of type
2685 va_list as a tree, TYPE is the type passed to va_arg. */
2686 #define EXPAND_BUILTIN_VA_ARG(VALIST, TYPE) \
2687 stormy16_expand_builtin_va_arg (VALIST, TYPE)
2689 /* Implement the stdarg/varargs va_end macro. VALIST is the variable of type
2690 va_list as a tree. */
2691 /* #define EXPAND_BUILTIN_VA_END(VALIST) */
2694 /* Trampolines for Nested Functions. */
2696 /* A C statement to output, on the stream FILE, assembler code for a block of
2697 data that contains the constant parts of a trampoline. This code should not
2698 include a label--the label is taken care of automatically. */
2699 /* #define TRAMPOLINE_TEMPLATE(FILE) */
2701 /* The name of a subroutine to switch to the section in which the trampoline
2702 template is to be placed. The default is a value of `readonly_data_section',
2703 which places the trampoline in the section containing read-only data. */
2704 /* #define TRAMPOLINE_SECTION */
2706 /* A C expression for the size in bytes of the trampoline, as an integer. */
2707 #define TRAMPOLINE_SIZE 8
2709 /* Alignment required for trampolines, in bits.
2711 If you don't define this macro, the value of `BIGGEST_ALIGNMENT' is used for
2712 aligning trampolines. */
2713 #define TRAMPOLINE_ALIGNMENT 16
2715 /* A C statement to initialize the variable parts of a trampoline. ADDR is an
2716 RTX for the address of the trampoline; FNADDR is an RTX for the address of
2717 the nested function; STATIC_CHAIN is an RTX for the static chain value that
2718 should be passed to the function when it is called. */
2719 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \
2720 stormy16_initialize_trampoline (ADDR, FNADDR, STATIC_CHAIN)
2722 /* A C expression to allocate run-time space for a trampoline. The expression
2723 value should be an RTX representing a memory reference to the space for the
2726 If this macro is not defined, by default the trampoline is allocated as a
2727 stack slot. This default is right for most machines. The exceptions are
2728 machines where it is impossible to execute instructions in the stack area.
2729 On such machines, you may have to implement a separate stack, using this
2730 macro in conjunction with `TARGET_ASM_FUNCTION_PROLOGUE' and
2731 `TARGET_ASM_FUNCTION_EPILOGUE'.
2733 FP points to a data structure, a `struct function', which describes the
2734 compilation status of the immediate containing function of the function
2735 which the trampoline is for. Normally (when `ALLOCATE_TRAMPOLINE' is not
2736 defined), the stack slot for the trampoline is in the stack frame of this
2737 containing function. Other allocation strategies probably must do something
2738 analogous with this information. */
2739 /* #define ALLOCATE_TRAMPOLINE(FP) */
2741 /* Implementing trampolines is difficult on many machines because they have
2742 separate instruction and data caches. Writing into a stack location fails
2743 to clear the memory in the instruction cache, so when the program jumps to
2744 that location, it executes the old contents.
2746 Here are two possible solutions. One is to clear the relevant parts of the
2747 instruction cache whenever a trampoline is set up. The other is to make all
2748 trampolines identical, by having them jump to a standard subroutine. The
2749 former technique makes trampoline execution faster; the latter makes
2750 initialization faster.
2752 To clear the instruction cache when a trampoline is initialized, define the
2753 following macros which describe the shape of the cache. */
2755 /* The total size in bytes of the cache. */
2756 /* #define INSN_CACHE_SIZE */
2758 /* The length in bytes of each cache line. The cache is divided into cache
2759 lines which are disjoint slots, each holding a contiguous chunk of data
2760 fetched from memory. Each time data is brought into the cache, an entire
2761 line is read at once. The data loaded into a cache line is always aligned
2762 on a boundary equal to the line size. */
2763 /* #define INSN_CACHE_LINE_WIDTH */
2765 /* The number of alternative cache lines that can hold any particular memory
2767 /* #define INSN_CACHE_DEPTH */
2769 /* Alternatively, if the machine has system calls or instructions to clear the
2770 instruction cache directly, you can define the following macro. */
2772 /* If defined, expands to a C expression clearing the *instruction cache* in
2773 the specified interval. If it is not defined, and the macro INSN_CACHE_SIZE
2774 is defined, some generic code is generated to clear the cache. The
2775 definition of this macro would typically be a series of `asm' statements.
2776 Both BEG and END are both pointer expressions. */
2777 /* #define CLEAR_INSN_CACHE (BEG, END) */
2779 /* To use a standard subroutine, define the following macro. In addition, you
2780 must make sure that the instructions in a trampoline fill an entire cache
2781 line with identical instructions, or else ensure that the beginning of the
2782 trampoline code is always aligned at the same point in its cache line. Look
2783 in `m68k.h' as a guide. */
2785 /* Define this macro if trampolines need a special subroutine to do their work.
2786 The macro should expand to a series of `asm' statements which will be
2787 compiled with GNU CC. They go in a library function named
2788 `__transfer_from_trampoline'.
2790 If you need to avoid executing the ordinary prologue code of a compiled C
2791 function when you jump to the subroutine, you can do so by placing a special
2792 label of your own in the assembler code. Use one `asm' statement to
2793 generate an assembler label, and another to make the label global. Then
2794 trampolines can use that label to jump directly to your special assembler
2796 /* #define TRANSFER_FROM_TRAMPOLINE */
2799 /* Implicit Calls to Library Routines */
2801 /* A C string constant giving the name of the function to call for
2802 multiplication of one signed full-word by another. If you do not define
2803 this macro, the default name is used, which is `__mulsi3', a function
2804 defined in `libgcc.a'. */
2805 /* #define MULSI3_LIBCALL */
2807 /* A C string constant giving the name of the function to call for division of
2808 one signed full-word by another. If you do not define this macro, the
2809 default name is used, which is `__divsi3', a function defined in `libgcc.a'. */
2810 /* #define DIVSI3_LIBCALL */
2812 /* A C string constant giving the name of the function to call for division of
2813 one unsigned full-word by another. If you do not define this macro, the
2814 default name is used, which is `__udivsi3', a function defined in
2816 /* #define UDIVSI3_LIBCALL */
2818 /* A C string constant giving the name of the function to call for the
2819 remainder in division of one signed full-word by another. If you do not
2820 define this macro, the default name is used, which is `__modsi3', a function
2821 defined in `libgcc.a'. */
2822 /* #define MODSI3_LIBCALL */
2824 /* A C string constant giving the name of the function to call for the
2825 remainder in division of one unsigned full-word by another. If you do not
2826 define this macro, the default name is used, which is `__umodsi3', a
2827 function defined in `libgcc.a'. */
2828 /* #define UMODSI3_LIBCALL */
2830 /* A C string constant giving the name of the function to call for
2831 multiplication of one signed double-word by another. If you do not define
2832 this macro, the default name is used, which is `__muldi3', a function
2833 defined in `libgcc.a'. */
2834 /* #define MULDI3_LIBCALL */
2836 /* A C string constant giving the name of the function to call for division of
2837 one signed double-word by another. If you do not define this macro, the
2838 default name is used, which is `__divdi3', a function defined in `libgcc.a'. */
2839 /* #define DIVDI3_LIBCALL */
2841 /* A C string constant giving the name of the function to call for division of
2842 one unsigned full-word by another. If you do not define this macro, the
2843 default name is used, which is `__udivdi3', a function defined in
2845 /* #define UDIVDI3_LIBCALL */
2847 /* A C string constant giving the name of the function to call for the
2848 remainder in division of one signed double-word by another. If you do not
2849 define this macro, the default name is used, which is `__moddi3', a function
2850 defined in `libgcc.a'. */
2851 /* #define MODDI3_LIBCALL */
2853 /* A C string constant giving the name of the function to call for the
2854 remainder in division of one unsigned full-word by another. If you do not
2855 define this macro, the default name is used, which is `__umoddi3', a
2856 function defined in `libgcc.a'. */
2857 /* #define UMODDI3_LIBCALL */
2859 /* Define this macro as a C statement that declares additional library routines
2860 renames existing ones. `init_optabs' calls this macro after initializing all
2861 the normal library routines. */
2862 /* #define INIT_TARGET_OPTABS */
2864 /* The value of `EDOM' on the target machine, as a C integer constant
2865 expression. If you don't define this macro, GNU CC does not attempt to
2866 deposit the value of `EDOM' into `errno' directly. Look in
2867 `/usr/include/errno.h' to find the value of `EDOM' on your system.
2869 If you do not define `TARGET_EDOM', then compiled code reports domain errors
2870 by calling the library function and letting it report the error. If
2871 mathematical functions on your system use `matherr' when there is an error,
2872 then you should leave `TARGET_EDOM' undefined so that `matherr' is used
2874 /* #define TARGET_EDOM */
2876 /* Define this macro as a C expression to create an rtl expression that refers
2877 to the global "variable" `errno'. (On certain systems, `errno' may not
2878 actually be a variable.) If you don't define this macro, a reasonable
2880 /* #define GEN_ERRNO_RTX */
2882 /* Define this macro if GNU CC should generate calls to the System V (and ANSI
2883 C) library functions `memcpy' and `memset' rather than the BSD functions
2884 `bcopy' and `bzero'.
2886 Defined in svr4.h. */
2887 #define TARGET_MEM_FUNCTIONS
2889 /* Define this macro if only `float' arguments cannot be passed to library
2890 routines (so they must be converted to `double'). This macro affects both
2891 how library calls are generated and how the library routines in `libgcc1.c'
2892 accept their arguments. It is useful on machines where floating and fixed
2893 point arguments are passed differently, such as the i860. */
2894 /* #define LIBGCC_NEEDS_DOUBLE */
2896 /* Define this macro to override the type used by the library routines to pick
2897 up arguments of type `float'. (By default, they use a union of `float' and
2900 The obvious choice would be `float'--but that won't work with traditional C
2901 compilers that expect all arguments declared as `float' to arrive as
2902 `double'. To avoid this conversion, the library routines ask for the value
2903 as some other type and then treat it as a `float'.
2905 On some systems, no other type will work for this. For these systems, you
2906 must use `LIBGCC_NEEDS_DOUBLE' instead, to force conversion of the values
2907 `double' before they are passed. */
2908 /* #define FLOAT_ARG_TYPE */
2910 /* Define this macro to override the way library routines redesignate a `float'
2911 argument as a `float' instead of the type it was passed as. The default is
2912 an expression which takes the `float' field of the union. */
2913 /* #define FLOATIFY(PASSED_VALUE) */
2915 /* Define this macro to override the type used by the library routines to
2916 return values that ought to have type `float'. (By default, they use
2919 The obvious choice would be `float'--but that won't work with traditional C
2920 compilers gratuitously convert values declared as `float' into `double'. */
2921 /* #define FLOAT_VALUE_TYPE */
2923 /* Define this macro to override the way the value of a `float'-returning
2924 library routine should be packaged in order to return it. These functions
2925 are actually declared to return type `FLOAT_VALUE_TYPE' (normally `int').
2927 These values can't be returned as type `float' because traditional C
2928 compilers would gratuitously convert the value to a `double'.
2930 A local variable named `intify' is always available when the macro `INTIFY'
2931 is used. It is a union of a `float' field named `f' and a field named `i'
2932 whose type is `FLOAT_VALUE_TYPE' or `int'.
2934 If you don't define this macro, the default definition works by copying the
2935 value through that union. */
2936 /* #define INTIFY(FLOAT_VALUE) */
2938 /* Define this macro as the name of the data type corresponding to `SImode' in
2939 the system's own C compiler.
2941 You need not define this macro if that type is `long int', as it usually is. */
2942 /* #define nongcc_SI_type */
2944 /* Define this macro as the name of the data type corresponding to the
2945 word_mode in the system's own C compiler.
2947 You need not define this macro if that type is `long int', as it usually is. */
2948 /* #define nongcc_word_type */
2950 /* Define these macros to supply explicit C statements to carry out various
2951 arithmetic operations on types `float' and `double' in the library routines
2952 in `libgcc1.c'. See that file for a full list of these macros and their
2955 On most machines, you don't need to define any of these macros, because the
2956 C compiler that comes with the system takes care of doing them. */
2957 /* #define perform_... */
2959 /* Define this macro to generate code for Objective C message sending using the
2960 calling convention of the NeXT system. This calling convention involves
2961 passing the object, the selector and the method arguments all at once to the
2962 method-lookup library function.
2964 The default calling convention passes just the object and the selector to
2965 the lookup function, which returns a pointer to the method. */
2966 /* #define NEXT_OBJC_RUNTIME */
2969 /* Addressing Modes */
2971 /* Define this macro if the machine supports post-increment addressing. */
2972 #define HAVE_POST_INCREMENT 1
2974 /* Similar for other kinds of addressing. */
2975 /* #define HAVE_PRE_INCREMENT 1 */
2976 /* #define HAVE_POST_DECREMENT 1 */
2977 #define HAVE_PRE_DECREMENT 1
2979 /* A C expression that is 1 if the RTX X is a constant which is a valid
2980 address. On most machines, this can be defined as `CONSTANT_P (X)', but a
2981 few machines are more restrictive in which constant addresses are supported.
2983 `CONSTANT_P' accepts integer-values expressions whose values are not
2984 explicitly known, such as `symbol_ref', `label_ref', and `high' expressions
2985 and `const' arithmetic expressions, in addition to `const_int' and
2986 `const_double' expressions. */
2987 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
2989 /* A number, the maximum number of registers that can appear in a valid memory
2990 address. Note that it is up to you to specify a value equal to the maximum
2991 number that `GO_IF_LEGITIMATE_ADDRESS' would ever accept. */
2992 #define MAX_REGS_PER_ADDRESS 1
2994 /* A C compound statement with a conditional `goto LABEL;' executed if X (an
2995 RTX) is a legitimate memory address on the target machine for a memory
2996 operand of mode MODE.
2998 It usually pays to define several simpler macros to serve as subroutines for
2999 this one. Otherwise it may be too complicated to understand.
3001 This macro must exist in two variants: a strict variant and a non-strict
3002 one. The strict variant is used in the reload pass. It must be defined so
3003 that any pseudo-register that has not been allocated a hard register is
3004 considered a memory reference. In contexts where some kind of register is
3005 required, a pseudo-register with no hard register must be rejected.
3007 The non-strict variant is used in other passes. It must be defined to
3008 accept all pseudo-registers in every context where some kind of register is
3011 Compiler source files that want to use the strict variant of this macro
3012 define the macro `REG_OK_STRICT'. You should use an `#ifdef REG_OK_STRICT'
3013 conditional to define the strict variant in that case and the non-strict
3016 Subroutines to check for acceptable registers for various purposes (one for
3017 base registers, one for index registers, and so on) are typically among the
3018 subroutines used to define `GO_IF_LEGITIMATE_ADDRESS'. Then only these
3019 subroutine macros need have two variants; the higher levels of macros may be
3020 the same whether strict or not.
3022 Normally, constant addresses which are the sum of a `symbol_ref' and an
3023 integer are stored inside a `const' RTX to mark them as constant.
3024 Therefore, there is no need to recognize such sums specifically as
3025 legitimate addresses. Normally you would simply recognize any `const' as
3028 Usually `PRINT_OPERAND_ADDRESS' is not prepared to handle constant sums that
3029 are not marked with `const'. It assumes that a naked `plus' indicates
3030 indexing. If so, then you *must* reject such naked constant sums as
3031 illegitimate addresses, so that none of them will be given to
3032 `PRINT_OPERAND_ADDRESS'.
3034 On some machines, whether a symbolic address is legitimate depends on the
3035 section that the address refers to. On these machines, define the macro
3036 `ENCODE_SECTION_INFO' to store the information into the `symbol_ref', and
3037 then check for it here. When you see a `const', you will have to look
3038 inside it to find the `symbol_ref' in order to determine the section.
3040 The best way to modify the name string is by adding text to the beginning,
3041 with suitable punctuation to prevent any ambiguity. Allocate the new name
3042 in `saveable_obstack'. You will have to modify `ASM_OUTPUT_LABELREF' to
3043 remove and decode the added text and output the name accordingly, and define
3044 `STRIP_NAME_ENCODING' to access the original name string.
3046 You can check the information stored here into the `symbol_ref' in the
3047 definitions of the macros `GO_IF_LEGITIMATE_ADDRESS' and
3048 `PRINT_OPERAND_ADDRESS'. */
3049 #ifdef REG_OK_STRICT
3050 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
3052 if (stormy16_legitimate_address_p (MODE, X, 1)) \
3056 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
3058 if (stormy16_legitimate_address_p (MODE, X, 0)) \
3062 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
3063 use as a base register. For hard registers, it should always accept those
3064 which the hardware permits and reject the others. Whether the macro accepts
3065 or rejects pseudo registers must be controlled by `REG_OK_STRICT' as
3066 described above. This usually requires two variant definitions, of which
3067 `REG_OK_STRICT' controls the one actually used. */
3068 #ifdef REG_OK_STRICT
3069 #define REG_OK_FOR_BASE_P(X) \
3070 (REGNO_OK_FOR_BASE_P (REGNO (X)) && (REGNO (X) < FIRST_PSEUDO_REGISTER))
3072 #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
3075 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
3076 use as an index register.
3078 The difference between an index register and a base register is that the
3079 index register may be scaled. If an address involves the sum of two
3080 registers, neither one of them scaled, then either one may be labeled the
3081 "base" and the other the "index"; but whichever labeling is used must fit
3082 the machine's constraints of which registers may serve in each capacity.
3083 The compiler will try both labelings, looking for one that is valid, and
3084 will reload one or both registers only if neither labeling works. */
3085 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
3087 /* A C compound statement that attempts to replace X with a valid memory
3088 address for an operand of mode MODE. WIN will be a C statement label
3089 elsewhere in the code; the macro definition may use
3091 GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN);
3093 to avoid further processing if the address has become legitimate.
3095 X will always be the result of a call to `break_out_memory_refs', and OLDX
3096 will be the operand that was given to that function to produce X.
3098 The code generated by this macro should not alter the substructure of X. If
3099 it transforms X into a more legitimate form, it should assign X (which will
3100 always be a C variable) a new value.
3102 It is not necessary for this macro to come up with a legitimate address.
3103 The compiler has standard ways of doing so in all cases. In fact, it is
3104 safe for this macro to do nothing. But often a machine-dependent strategy
3105 can generate better code. */
3106 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)
3108 /* A C statement or compound statement with a conditional `goto LABEL;'
3109 executed if memory address X (an RTX) can have different meanings depending
3110 on the machine mode of the memory reference it is used for or if the address
3111 is valid for some modes but not others.
3113 Autoincrement and autodecrement addresses typically have mode-dependent
3114 effects because the amount of the increment or decrement is the size of the
3115 operand being addressed. Some machines have other mode-dependent addresses.
3116 Many RISC machines have no mode-dependent addresses.
3118 You may assume that ADDR is a valid address for the machine.
3120 On this chip, this is true if the address is valid with an offset
3121 of 0 but not of 6, because in that case it cannot be used as an
3122 address for DImode or DFmode, or if the address is a post-increment
3123 or pre-decrement address.
3125 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \
3126 if (stormy16_mode_dependent_address_p (ADDR)) \
3129 /* A C expression that is nonzero if X is a legitimate constant for an
3130 immediate operand on the target machine. You can assume that X satisfies
3131 `CONSTANT_P', so you need not check this. In fact, `1' is a suitable
3132 definition for this macro on machines where anything `CONSTANT_P' is valid. */
3133 #define LEGITIMATE_CONSTANT_P(X) 1
3136 /* Condition Code Status */
3138 /* C code for a data type which is used for declaring the `mdep' component of
3139 `cc_status'. It defaults to `int'.
3141 This macro is not used on machines that do not use `cc0'. */
3142 /* #define CC_STATUS_MDEP */
3144 /* A C expression to initialize the `mdep' field to "empty". The default
3145 definition does nothing, since most machines don't use the field anyway. If
3146 you want to use the field, you should probably define this macro to
3149 This macro is not used on machines that do not use `cc0'. */
3150 /* #define CC_STATUS_MDEP_INIT */
3152 /* A C compound statement to set the components of `cc_status' appropriately
3153 for an insn INSN whose body is EXP. It is this macro's responsibility to
3154 recognize insns that set the condition code as a byproduct of other activity
3155 as well as those that explicitly set `(cc0)'.
3157 This macro is not used on machines that do not use `cc0'.
3159 If there are insns that do not set the condition code but do alter other
3160 machine registers, this macro must check to see whether they invalidate the
3161 expressions that the condition code is recorded as reflecting. For example,
3162 on the 68000, insns that store in address registers do not set the condition
3163 code, which means that usually `NOTICE_UPDATE_CC' can leave `cc_status'
3164 unaltered for such insns. But suppose that the previous insn set the
3165 condition code based on location `a4@(102)' and the current insn stores a
3166 new value in `a4'. Although the condition code is not changed by this, it
3167 will no longer be true that it reflects the contents of `a4@(102)'.
3168 Therefore, `NOTICE_UPDATE_CC' must alter `cc_status' in this case to say
3169 that nothing is known about the condition code value.
3171 The definition of `NOTICE_UPDATE_CC' must be prepared to deal with the
3172 results of peephole optimization: insns whose patterns are `parallel' RTXs
3173 containing various `reg', `mem' or constants which are just the operands.
3174 The RTL structure of these insns is not sufficient to indicate what the
3175 insns actually do. What `NOTICE_UPDATE_CC' should do when it sees one is
3176 just to run `CC_STATUS_INIT'.
3178 A possible definition of `NOTICE_UPDATE_CC' is to call a function that looks
3179 at an attribute named, for example, `cc'. This avoids having detailed
3180 information about patterns in two places, the `md' file and in
3181 `NOTICE_UPDATE_CC'. */
3182 /* #define NOTICE_UPDATE_CC(EXP, INSN) */
3184 /* A list of names to be used for additional modes for condition code values in
3185 registers. These names are added to `enum machine_mode' and all have class
3186 `MODE_CC'. By convention, they should start with `CC' and end with `mode'.
3188 You should only define this macro if your machine does not use `cc0' and
3189 only if additional modes are required. */
3190 /* #define EXTRA_CC_MODES */
3192 /* Returns a mode from class `MODE_CC' to be used when comparison operation
3193 code OP is applied to rtx X and Y. For example, on the Sparc,
3194 `SELECT_CC_MODE' is defined as (see *note Jump Patterns::. for a
3195 description of the reason for this definition)
3197 #define SELECT_CC_MODE(OP,X,Y) \
3198 (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \
3199 ? ((OP == EQ || OP == NE) ? CCFPmode : CCFPEmode) \
3200 : ((GET_CODE (X) == PLUS || GET_CODE (X) == MINUS \
3201 || GET_CODE (X) == NEG) \
3202 ? CC_NOOVmode : CCmode))
3204 You need not define this macro if `EXTRA_CC_MODES' is not defined. */
3205 /* #define SELECT_CC_MODE(OP, X, Y) */
3207 /* One some machines not all possible comparisons are defined, but you can
3208 convert an invalid comparison into a valid one. For example, the Alpha does
3209 not have a `GT' comparison, but you can use an `LT' comparison instead and
3210 swap the order of the operands.
3212 On such machines, define this macro to be a C statement to do any required
3213 conversions. CODE is the initial comparison code and OP0 and OP1 are the
3214 left and right operands of the comparison, respectively. You should modify
3215 CODE, OP0, and OP1 as required.
3217 GNU CC will not assume that the comparison resulting from this macro is
3218 valid but will see if the resulting insn matches a pattern in the `md' file.
3220 You need not define this macro if it would never change the comparison code
3222 /* #define CANONICALIZE_COMPARISON(CODE, OP0, OP1) */
3224 /* A C expression whose value is one if it is always safe to reverse a
3225 comparison whose mode is MODE. If `SELECT_CC_MODE' can ever return MODE for
3226 a floating-point inequality comparison, then `REVERSIBLE_CC_MODE (MODE)'
3229 You need not define this macro if it would always returns zero or if the
3230 floating-point format is anything other than `IEEE_FLOAT_FORMAT'. For
3231 example, here is the definition used on the Sparc, where floating-point
3232 inequality comparisons are always given `CCFPEmode':
3234 #define REVERSIBLE_CC_MODE(MODE) ((MODE) != CCFPEmode) */
3235 /* #define REVERSIBLE_CC_MODE(MODE) */
3238 /* Describing Relative Costs of Operations */
3240 /* A part of a C `switch' statement that describes the relative costs of
3241 constant RTL expressions. It must contain `case' labels for expression
3242 codes `const_int', `const', `symbol_ref', `label_ref' and `const_double'.
3243 Each case must ultimately reach a `return' statement to return the relative
3244 cost of the use of that kind of constant value in an expression. The cost
3245 may depend on the precise value of the constant, which is available for
3246 examination in X, and the rtx code of the expression in which it is
3247 contained, found in OUTER_CODE.
3249 CODE is the expression code--redundant, since it can be obtained with
3251 /* #define CONST_COSTS(X, CODE, OUTER_CODE) */
3253 /* Like `CONST_COSTS' but applies to nonconstant RTL expressions. This can be
3254 used, for example, to indicate how costly a multiply instruction is. In
3255 writing this macro, you can use the construct `COSTS_N_INSNS (N)' to specify
3256 a cost equal to N fast instructions. OUTER_CODE is the code of the
3257 expression in which X is contained.
3259 This macro is optional; do not define it if the default cost assumptions are
3260 adequate for the target machine. */
3261 /* #define RTX_COSTS(X, CODE, OUTER_CODE) */
3263 /* An expression giving the cost of an addressing mode that contains ADDRESS.
3264 If not defined, the cost is computed from the ADDRESS expression and the
3265 `CONST_COSTS' values.
3267 For most CISC machines, the default cost is a good approximation of the true
3268 cost of the addressing mode. However, on RISC machines, all instructions
3269 normally have the same length and execution time. Hence all addresses will
3272 In cases where more than one form of an address is known, the form with the
3273 lowest cost will be used. If multiple forms have the same, lowest, cost,
3274 the one that is the most complex will be used.
3276 For example, suppose an address that is equal to the sum of a register and a
3277 constant is used twice in the same basic block. When this macro is not
3278 defined, the address will be computed in a register and memory references
3279 will be indirect through that register. On machines where the cost of the
3280 addressing mode containing the sum is no higher than that of a simple
3281 indirect reference, this will produce an additional instruction and possibly
3282 require an additional register. Proper specification of this macro
3283 eliminates this overhead for such machines.
3285 Similar use of this macro is made in strength reduction of loops.
3287 ADDRESS need not be valid as an address. In such a case, the cost is not
3288 relevant and can be any value; invalid addresses need not be assigned a
3291 On machines where an address involving more than one register is as cheap as
3292 an address computation involving only one register, defining `ADDRESS_COST'
3293 to reflect this can cause two registers to be live over a region of code
3294 where only one would have been if `ADDRESS_COST' were not defined in that
3295 manner. This effect should be considered in the definition of this macro.
3296 Equivalent costs should probably only be given to addresses with different
3297 numbers of registers on machines with lots of registers.
3299 This macro will normally either not be defined or be defined as a constant. */
3300 /* #define ADDRESS_COST(ADDRESS) */
3302 /* A C expression for the cost of moving data of mode MODE from a
3303 register in class FROM to one in class TO. The classes are
3304 expressed using the enumeration values such as `GENERAL_REGS'. A
3305 value of 4 is the default; other values are interpreted relative to
3308 It is not required that the cost always equal 2 when FROM is the same as TO;
3309 on some machines it is expensive to move between registers if they are not
3312 If reload sees an insn consisting of a single `set' between two hard
3313 registers, and if `REGISTER_MOVE_COST' applied to their classes returns a
3314 value of 2, reload does not check to ensure that the constraints of the insn
3315 are met. Setting a cost of other than 2 will allow reload to verify that
3316 the constraints are met. You should do this if the `movM' pattern's
3317 constraints do not allow such copying. */
3318 #define REGISTER_MOVE_COST(MODE, FROM, TO) 2
3320 /* A C expression for the cost of moving data of mode M between a register and
3321 memory. A value of 2 is the default; this cost is relative to those in
3322 `REGISTER_MOVE_COST'.
3324 If moving between registers and memory is more expensive than between two
3325 registers, you should define this macro to express the relative cost. */
3326 #define MEMORY_MOVE_COST(M,C,I) 5
3328 /* A C expression for the cost of a branch instruction. A value of 1 is the
3329 default; other values are interpreted relative to that. */
3331 #define BRANCH_COST 5
3333 /* Here are additional macros which do not specify precise relative costs, but
3334 only that certain actions are more expensive than GNU CC would ordinarily
3337 /* Define this macro as a C expression which is nonzero if accessing less than
3338 a word of memory (i.e. a `char' or a `short') is no faster than accessing a
3339 word of memory, i.e., if such access require more than one instruction or if
3340 there is no difference in cost between byte and (aligned) word loads.
3342 When this macro is not defined, the compiler will access a field by finding
3343 the smallest containing object; when it is defined, a fullword load will be
3344 used if alignment permits. Unless bytes accesses are faster than word
3345 accesses, using word accesses is preferable since it may eliminate
3346 subsequent memory access if subsequent accesses occur to other fields in the
3347 same word of the structure, but to different bytes. */
3348 #define SLOW_BYTE_ACCESS 0
3350 /* Define this macro if zero-extension (of a `char' or `short' to an `int') can
3351 be done faster if the destination is a register that is known to be zero.
3353 If you define this macro, you must have instruction patterns that recognize
3354 RTL structures like this:
3356 (set (strict_low_part (subreg:QI (reg:SI ...) 0)) ...)
3358 and likewise for `HImode'. */
3359 #define SLOW_ZERO_EXTEND 0
3361 /* Define this macro to be the value 1 if unaligned accesses have a cost many
3362 times greater than aligned accesses, for example if they are emulated in a
3365 When this macro is non-zero, the compiler will act as if `STRICT_ALIGNMENT'
3366 were non-zero when generating code for block moves. This can cause
3367 significantly more instructions to be produced. Therefore, do not set this
3368 macro non-zero if unaligned accesses only add a cycle or two to the time for
3371 If the value of this macro is always zero, it need not be defined. */
3372 /* #define SLOW_UNALIGNED_ACCESS */
3374 /* Define this macro to inhibit strength reduction of memory addresses. (On
3375 some machines, such strength reduction seems to do harm rather than good.) */
3376 /* #define DONT_REDUCE_ADDR */
3378 /* The number of scalar move insns which should be generated instead of a
3379 string move insn or a library call. Increasing the value will always make
3380 code faster, but eventually incurs high cost in increased code size.
3382 If you don't define this, a reasonable default is used. */
3383 /* #define MOVE_RATIO */
3385 /* Define this macro if it is as good or better to call a constant function
3386 address than to call an address kept in a register. */
3387 #define NO_FUNCTION_CSE
3389 /* Define this macro if it is as good or better for a function to call itself
3390 with an explicit address than to call an address kept in a register. */
3391 #define NO_RECURSIVE_FUNCTION_CSE
3393 /* A C statement (sans semicolon) to update the integer variable COST based on
3394 the relationship between INSN that is dependent on DEP_INSN through the
3395 dependence LINK. The default is to make no adjustment to COST. This can be
3396 used for example to specify to the scheduler that an output- or
3397 anti-dependence does not incur the same cost as a data-dependence. */
3398 /* #define ADJUST_COST(INSN, LINK, DEP_INSN, COST) */
3400 /* A C statement (sans semicolon) to update the integer scheduling
3401 priority `INSN_PRIORITY(INSN)'. Reduce the priority to execute
3402 the INSN earlier, increase the priority to execute INSN later.
3403 Do not define this macro if you do not need to adjust the
3404 scheduling priorities of insns. */
3405 /* #define ADJUST_PRIORITY (INSN) */
3408 /* Dividing the output into sections. */
3410 /* A C expression whose value is a string containing the assembler operation
3411 that should precede instructions and read-only data. Normally `".text"' is
3413 #define TEXT_SECTION_ASM_OP ".text"
3415 /* A C expression whose value is a string containing the assembler operation to
3416 identify the following data as writable initialized data. Normally
3417 `".data"' is right. */
3418 #define DATA_SECTION_ASM_OP ".data"
3420 /* if defined, a C expression whose value is a string containing the assembler
3421 operation to identify the following data as shared data. If not defined,
3422 `DATA_SECTION_ASM_OP' will be used. */
3423 /* #define SHARED_SECTION_ASM_OP */
3425 /* If defined, a C expression whose value is a string containing the
3426 assembler operation to identify the following data as
3427 uninitialized global data. If not defined, and neither
3428 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
3429 uninitialized global data will be output in the data section if
3430 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
3432 #define BSS_SECTION_ASM_OP ".bss"
3434 /* If defined, a C expression whose value is a string containing the
3435 assembler operation to identify the following data as
3436 uninitialized global shared data. If not defined, and
3437 `BSS_SECTION_ASM_OP' is, the latter will be used. */
3438 /* #define SHARED_BSS_SECTION_ASM_OP */
3440 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
3441 There are no shared libraries on this target so these sections need
3444 Defined in elfos.h. */
3446 #undef CTORS_SECTION_ASM_OP
3447 #undef DTORS_SECTION_ASM_OP
3448 #define CTORS_SECTION_ASM_OP "\t.section\t.ctors,\"a\""
3449 #define DTORS_SECTION_ASM_OP "\t.section\t.dtors,\"a\""
3451 /* A list of names for sections other than the standard two, which are
3452 `in_text' and `in_data'. You need not define this macro on a system with no
3453 other sections (that GCC needs to use).
3455 Defined in svr4.h. */
3456 /* #define EXTRA_SECTIONS */
3458 /* One or more functions to be defined in `varasm.c'. These functions should
3459 do jobs analogous to those of `text_section' and `data_section', for your
3460 additional sections. Do not define this macro if you do not define
3463 Defined in svr4.h. */
3464 /* #define EXTRA_SECTION_FUNCTIONS */
3466 /* On most machines, read-only variables, constants, and jump tables are placed
3467 in the text section. If this is not the case on your machine, this macro
3468 should be defined to be the name of a function (either `data_section' or a
3469 function defined in `EXTRA_SECTIONS') that switches to the section to be
3470 used for read-only items.
3472 If these items should be placed in the text section, this macro should not
3474 /* #define READONLY_DATA_SECTION */
3476 /* A C statement or statements to switch to the appropriate section for output
3477 of EXP. You can assume that EXP is either a `VAR_DECL' node or a constant
3478 of some sort. RELOC indicates whether the initial value of EXP requires
3479 link-time relocations. Select the section by calling `text_section' or one
3480 of the alternatives for other sections.
3482 Do not define this macro if you put all read-only variables and constants in
3483 the read-only data section (usually the text section).
3485 Defined in svr4.h. */
3486 /* #define SELECT_SECTION(EXP, RELOC, ALIGN) */
3488 /* A C statement or statements to switch to the appropriate section for output
3489 of RTX in mode MODE. You can assume that RTX is some kind of constant in
3490 RTL. The argument MODE is redundant except in the case of a `const_int'
3491 rtx. Select the section by calling `text_section' or one of the
3492 alternatives for other sections.
3494 Do not define this macro if you put all constants in the read-only data
3497 Defined in svr4.h. */
3498 /* #define SELECT_RTX_SECTION(MODE, RTX, ALIGN) */
3500 /* Define this macro if jump tables (for `tablejump' insns) should be output in
3501 the text section, along with the assembler instructions. Otherwise, the
3502 readonly data section is used.
3504 This macro is irrelevant if there is no separate readonly data section. */
3505 #define JUMP_TABLES_IN_TEXT_SECTION 1
3507 /* Define this macro if references to a symbol must be treated differently
3508 depending on something about the variable or function named by the symbol
3509 (such as what section it is in).
3511 The macro definition, if any, is executed immediately after the rtl for DECL
3512 has been created and stored in `DECL_RTL (DECL)'. The value of the rtl will
3513 be a `mem' whose address is a `symbol_ref'.
3515 The usual thing for this macro to do is to record a flag in the `symbol_ref'
3516 (such as `SYMBOL_REF_FLAG') or to store a modified name string in the
3517 `symbol_ref' (if one bit is not enough information). */
3518 #define ENCODE_SECTION_INFO(DECL) stormy16_encode_section_info(DECL)
3520 /* Decode SYM_NAME and store the real name part in VAR, sans the characters
3521 that encode section info. Define this macro if `ENCODE_SECTION_INFO' alters
3522 the symbol's name string. */
3523 /* #define STRIP_NAME_ENCODING(VAR, SYM_NAME) */
3525 /* A C statement to build up a unique section name, expressed as a
3526 STRING_CST node, and assign it to `DECL_SECTION_NAME (DECL)'.
3527 RELOC indicates whether the initial value of EXP requires
3528 link-time relocations. If you do not define this macro, GNU CC
3529 will use the symbol name prefixed by `.' as the section name.
3531 Defined in svr4.h. */
3532 /* #define UNIQUE_SECTION(DECL, RELOC) */
3535 /* Position Independent Code. */
3537 /* The register number of the register used to address a table of static data
3538 addresses in memory. In some cases this register is defined by a
3539 processor's "application binary interface" (ABI). When this macro is
3540 defined, RTL is generated for this register once, as with the stack pointer
3541 and frame pointer registers. If this macro is not defined, it is up to the
3542 machine-dependent files to allocate such a register (if necessary). */
3543 /* #define PIC_OFFSET_TABLE_REGNUM */
3545 /* Define this macro if the register defined by `PIC_OFFSET_TABLE_REGNUM' is
3546 clobbered by calls. Do not define this macro if `PPIC_OFFSET_TABLE_REGNUM'
3548 /* #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED */
3550 /* By generating position-independent code, when two different programs (A and
3551 B) share a common library (libC.a), the text of the library can be shared
3552 whether or not the library is linked at the same address for both programs.
3553 In some of these environments, position-independent code requires not only
3554 the use of different addressing modes, but also special code to enable the
3555 use of these addressing modes.
3557 The `FINALIZE_PIC' macro serves as a hook to emit these special codes once
3558 the function is being compiled into assembly code, but not before. (It is
3559 not done before, because in the case of compiling an inline function, it
3560 would lead to multiple PIC prologues being included in functions which used
3561 inline functions and were compiled to assembly language.) */
3562 /* #define FINALIZE_PIC */
3564 /* A C expression that is nonzero if X is a legitimate immediate operand on the
3565 target machine when generating position independent code. You can assume
3566 that X satisfies `CONSTANT_P', so you need not check this. You can also
3567 assume FLAG_PIC is true, so you need not check it either. You need not
3568 define this macro if all constants (including `SYMBOL_REF') can be immediate
3569 operands when generating position independent code. */
3570 /* #define LEGITIMATE_PIC_OPERAND_P(X) */
3573 /* The Overall Framework of an Assembler File. */
3575 /* A C expression which outputs to the stdio stream STREAM some appropriate
3576 text to go at the start of an assembler file.
3578 Normally this macro is defined to output a line containing `#NO_APP', which
3579 is a comment that has no effect on most assemblers but tells the GNU
3580 assembler that it can save time by not checking for certain assembler
3583 On systems that use SDB, it is necessary to output certain commands; see
3586 Defined in svr4.h. */
3587 /* #define ASM_FILE_START(STREAM) */
3589 /* A C expression which outputs to the stdio stream STREAM some appropriate
3590 text to go at the end of an assembler file.
3592 If this macro is not defined, the default is to output nothing special at
3593 the end of the file. Most systems don't require any definition.
3595 On systems that use SDB, it is necessary to output certain commands; see
3598 Defined in svr4.h. */
3599 /* #define ASM_FILE_END(STREAM) */
3601 /* A C statement to output assembler commands which will identify the object
3602 file as having been compiled with GNU CC (or another GNU compiler).
3604 If you don't define this macro, the string `gcc_compiled.:' is output. This
3605 string is calculated to define a symbol which, on BSD systems, will never be
3606 defined for any other reason. GDB checks for the presence of this symbol
3607 when reading the symbol table of an executable.
3609 On non-BSD systems, you must arrange communication with GDB in some other
3610 fashion. If GDB is not used on your system, you can define this macro with
3613 Defined in svr4.h. */
3614 /* #define ASM_IDENTIFY_GCC(FILE) */
3616 /* Like ASM_IDENTIFY_GCC, but used when dbx debugging is selected to emit
3617 a stab the debugger uses to identify gcc as the compiler that is emitted
3618 after the stabs for the filename, which makes it easier for GDB to parse.
3620 Defined in svr4.h. */
3621 /* #define ASM_IDENTIFY_GCC_AFTER_SOURCE(FILE) */
3623 /* A C string constant describing how to begin a comment in the target
3624 assembler language. The compiler assumes that the comment will end at the
3626 #define ASM_COMMENT_START ";"
3628 /* A C string constant for text to be output before each `asm' statement or
3629 group of consecutive ones. Normally this is `"#APP"', which is a comment
3630 that has no effect on most assemblers but tells the GNU assembler that it
3631 must check the lines that follow for all valid assembler constructs. */
3632 #define ASM_APP_ON "#APP\n"
3634 /* A C string constant for text to be output after each `asm' statement or
3635 group of consecutive ones. Normally this is `"#NO_APP"', which tells the
3636 GNU assembler to resume making the time-saving assumptions that are valid
3637 for ordinary compiler output. */
3638 #define ASM_APP_OFF "#NO_APP\n"
3640 /* A C statement to output COFF information or DWARF debugging information
3641 which indicates that filename NAME is the current source file to the stdio
3644 This macro need not be defined if the standard form of output for the file
3645 format in use is appropriate. */
3646 /* #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */
3648 /* A C statement to output DBX or SDB debugging information before code for
3649 line number LINE of the current source file to the stdio stream STREAM.
3651 This macro need not be defined if the standard form of debugging information
3652 for the debugger in use is appropriate.
3654 Defined in svr4.h. */
3655 /* #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) */
3657 /* A C statement to output something to the assembler file to handle a `#ident'
3658 directive containing the text STRING. If this macro is not defined, nothing
3659 is output for a `#ident' directive.
3661 Defined in svr4.h. */
3662 /* #define ASM_OUTPUT_IDENT(STREAM, STRING) */
3664 /* A C statement to output something to the assembler file to switch to section
3665 NAME for object DECL which is either a `FUNCTION_DECL', a `VAR_DECL' or
3666 `NULL_TREE'. Some target formats do not support arbitrary sections. Do not
3667 define this macro in such cases.
3669 At present this macro is only used to support section attributes. When this
3670 macro is undefined, section attributes are disabled.
3672 Defined in svr4.h. */
3673 /* #define ASM_OUTPUT_SECTION_NAME(STREAM, DECL, NAME) */
3675 /* A C statement to output any assembler statements which are required to
3676 precede any Objective C object definitions or message sending. The
3677 statement is executed only when compiling an Objective C program. */
3678 /* #define OBJC_PROLOGUE */
3681 /* Output of Data. */
3683 /* A C statement to output to the stdio stream STREAM an assembler instruction
3684 to assemble a floating-point constant of `TFmode', `DFmode', `SFmode',
3685 `TQFmode', `HFmode', or `QFmode', respectively, whose value is VALUE. VALUE
3686 will be a C expression of type `REAL_VALUE_TYPE'. Macros such as
3687 `REAL_VALUE_TO_TARGET_DOUBLE' are useful for writing these definitions. */
3689 /* This is how to output an assembler line defining a `double'. */
3690 #define ASM_OUTPUT_DOUBLE(STREAM,VALUE) \
3691 do { char dstr[30]; \
3692 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", dstr); \
3693 fprintf ((STREAM), "\t.double %s\n", dstr); \
3696 /* This is how to output an assembler line defining a `float' constant. */
3697 #define ASM_OUTPUT_FLOAT(STREAM,VALUE) \
3698 do { char dstr[30]; \
3699 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", dstr); \
3700 fprintf ((STREAM), "\t.float %s\n", dstr); \
3703 /* #define ASM_OUTPUT_LONG_DOUBLE(STREAM, VALUE) */
3704 /* #define ASM_OUTPUT_THREE_QUARTER_FLOAT(STREAM, VALUE) */
3705 /* #define ASM_OUTPUT_SHORT_FLOAT(STREAM, VALUE) */
3706 /* #define ASM_OUTPUT_BYTE_FLOAT(STREAM, VALUE) */
3708 /* A C statement to output to the stdio stream STREAM an assembler instruction
3709 to assemble an integer of 16, 8, 4, 2 or 1 bytes, respectively, whose value
3710 is VALUE. The argument EXP will be an RTL expression which represents a
3711 constant value. Use `output_addr_const (STREAM, EXP)' to output this value
3712 as an assembler expression.
3714 For sizes larger than `UNITS_PER_WORD', if the action of a macro would be
3715 identical to repeatedly calling the macro corresponding to a size of
3716 `UNITS_PER_WORD', once for each word, you need not define the macro. */
3717 /* #define ASM_OUTPUT_QUADRUPLE_INT(STREAM, EXP) */
3718 /* #define ASM_OUTPUT_DOUBLE_INT(STREAM, EXP) */
3720 /* This is how to output an assembler line defining a `char' constant. */
3721 #define ASM_OUTPUT_CHAR(FILE, VALUE) \
3723 fprintf (FILE, "\t.byte\t"); \
3724 output_addr_const (FILE, (VALUE)); \
3725 fprintf (FILE, "\n"); \
3728 /* This is how to output an assembler line defining a `short' constant. */
3729 #define ASM_OUTPUT_SHORT(FILE, VALUE) \
3731 fprintf (FILE, "\t.hword\t"); \
3732 output_addr_const (FILE, (VALUE)); \
3733 fprintf (FILE, "\n"); \
3736 /* This is how to output an assembler line defining an `int' constant.
3737 We also handle symbol output here. */
3738 #define ASM_OUTPUT_INT(FILE, VALUE) \
3740 fprintf (FILE, "\t.word\t"); \
3741 output_addr_const (FILE, (VALUE)); \
3742 fprintf (FILE, "\n"); \
3745 /* A C statement to output to the stdio stream STREAM an assembler instruction
3746 to assemble a single byte containing the number VALUE.
3748 This declaration must be present. */
3749 #define ASM_OUTPUT_BYTE(STREAM, VALUE) \
3750 fprintf (STREAM, "\t%s\t0x%x\n", ASM_BYTE_OP, (VALUE))
3752 /* A C string constant giving the pseudo-op to use for a sequence of
3753 single-byte constants. If this macro is not defined, the default
3756 Defined in svr4.h. */
3757 /* #define ASM_BYTE_OP */
3759 /* A C statement to output to the stdio stream STREAM an assembler instruction
3760 to assemble a string constant containing the LEN bytes at PTR. PTR will be
3761 a C expression of type `char *' and LEN a C expression of type `int'.
3763 If the assembler has a `.ascii' pseudo-op as found in the Berkeley Unix
3764 assembler, do not define the macro `ASM_OUTPUT_ASCII'.
3766 Defined in svr4.h. */
3767 /* #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) */
3769 /* You may define this macro as a C expression. You should define the
3770 expression to have a non-zero value if GNU CC should output the
3771 constant pool for a function before the code for the function, or
3772 a zero value if GNU CC should output the constant pool after the
3773 function. If you do not define this macro, the usual case, GNU CC
3774 will output the constant pool before the function. */
3775 /* #define CONSTANT_POOL_BEFORE_FUNCTION */
3777 /* A C statement to output assembler commands to define the start of the
3778 constant pool for a function. FUNNAME is a string giving the name of the
3779 function. Should the return type of the function be required, it can be
3780 obtained via FUNDECL. SIZE is the size, in bytes, of the constant pool that
3781 will be written immediately after this call.
3783 If no constant-pool prefix is required, the usual case, this macro need not
3785 /* #define ASM_OUTPUT_POOL_PROLOGUE(FILE FUNNAME FUNDECL SIZE) */
3787 /* A C statement (with or without semicolon) to output a constant in the
3788 constant pool, if it needs special treatment. (This macro need not do
3789 anything for RTL expressions that can be output normally.)
3791 The argument FILE is the standard I/O stream to output the assembler code
3792 on. X is the RTL expression for the constant to output, and MODE is the
3793 machine mode (in case X is a `const_int'). ALIGN is the required alignment
3794 for the value X; you should output an assembler directive to force this much
3797 The argument LABELNO is a number to use in an internal label for the address
3798 of this pool entry. The definition of this macro is responsible for
3799 outputting the label definition at the proper place. Here is how to do
3802 ASM_OUTPUT_INTERNAL_LABEL (FILE, "LC", LABELNO);
3804 When you output a pool entry specially, you should end with a `goto' to the
3805 label JUMPTO. This will prevent the same pool entry from being output a
3806 second time in the usual manner.
3808 You need not define this macro if it would do nothing. */
3809 /* #define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE, X, MODE, ALIGN, LABELNO, JUMPTO) */
3811 /* Define this macro as a C expression which is nonzero if the constant EXP, of
3812 type `tree', should be output after the code for a function. The compiler
3813 will normally output all constants before the function; you need not define
3814 this macro if this is OK. */
3815 /* #define CONSTANT_AFTER_FUNCTION_P(EXP) */
3817 /* A C statement to output assembler commands to at the end of the constant
3818 pool for a function. FUNNAME is a string giving the name of the function.
3819 Should the return type of the function be required, you can obtain it via
3820 FUNDECL. SIZE is the size, in bytes, of the constant pool that GNU CC wrote
3821 immediately before this call.
3823 If no constant-pool epilogue is required, the usual case, you need not
3824 define this macro. */
3825 /* #define ASM_OUTPUT_POOL_EPILOGUE (FILE FUNNAME FUNDECL SIZE) */
3827 /* Define this macro as a C expression which is nonzero if C is used as a
3828 logical line separator by the assembler.
3830 If you do not define this macro, the default is that only the character `;'
3831 is treated as a logical line separator. */
3832 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == '|')
3834 /* These macros are provided by `real.h' for writing the definitions of
3835 `ASM_OUTPUT_DOUBLE' and the like: */
3837 /* These translate X, of type `REAL_VALUE_TYPE', to the target's floating point
3838 representation, and store its bit pattern in the array of `long int' whose
3839 address is L. The number of elements in the output array is determined by
3840 the size of the desired target floating point data type: 32 bits of it go in
3841 each `long int' array element. Each array element holds 32 bits of the
3842 result, even if `long int' is wider than 32 bits on the host machine.
3844 The array element values are designed so that you can print them out using
3845 `fprintf' in the order they should appear in the target machine's memory. */
3846 /* #define REAL_VALUE_TO_TARGET_SINGLE(X, L) */
3847 /* #define REAL_VALUE_TO_TARGET_DOUBLE(X, L) */
3848 /* #define REAL_VALUE_TO_TARGET_LONG_DOUBLE(X, L) */
3850 /* This macro converts X, of type `REAL_VALUE_TYPE', to a decimal number and
3851 stores it as a string into STRING. You must pass, as STRING, the address of
3852 a long enough block of space to hold the result.
3854 The argument FORMAT is a `printf'-specification that serves as a suggestion
3855 for how to format the output string. */
3856 /* #define REAL_VALUE_TO_DECIMAL(X, FORMAT, STRING) */
3859 /* Output of Uninitialized Variables. */
3861 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
3862 assembler definition of a common-label named NAME whose size is SIZE bytes.
3863 The variable ROUNDED is the size rounded up to whatever alignment the caller
3866 Use the expression `assemble_name (STREAM, NAME)' to output the name itself;
3867 before and after that, output the additional assembler syntax for defining
3868 the name, and a newline.
3870 This macro controls how the assembler definitions of uninitialized global
3871 variables are output. */
3872 /* #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) */
3874 /* Like `ASM_OUTPUT_COMMON' except takes the required alignment as a separate,
3875 explicit argument. If you define this macro, it is used in place of
3876 `ASM_OUTPUT_COMMON', and gives you more flexibility in handling the required
3877 alignment of the variable. The alignment is specified as the number of
3880 Defined in svr4.h. */
3881 /* #define ASM_OUTPUT_ALIGNED_COMMON(STREAM, NAME, SIZE, ALIGNMENT) */
3883 /* Like ASM_OUTPUT_ALIGNED_COMMON except that it takes an additional argument -
3884 the DECL of the variable to be output, if there is one. This macro can be
3885 called with DECL == NULL_TREE. If you define this macro, it is used in
3886 place of both ASM_OUTPUT_COMMON and ASM_OUTPUT_ALIGNED_COMMON, and gives you
3887 more flexibility in handling the destination of the variable. */
3888 /* #define ASM_OUTPUT_DECL_COMMON (STREAM, DECL, NAME, SIZE, ALIGNMENT) */
3890 /* If defined, it is similar to `ASM_OUTPUT_COMMON', except that it is used
3891 when NAME is shared. If not defined, `ASM_OUTPUT_COMMON' will be used. */
3892 /* #define ASM_OUTPUT_SHARED_COMMON(STREAM, NAME, SIZE, ROUNDED) */
3894 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
3895 assembler definition of uninitialized global DECL named NAME whose size is
3896 SIZE bytes. The variable ROUNDED is the size rounded up to whatever
3897 alignment the caller wants.
3899 Try to use function `asm_output_bss' defined in `varasm.c' when defining
3900 this macro. If unable, use the expression `assemble_name (STREAM, NAME)' to
3901 output the name itself; before and after that, output the additional
3902 assembler syntax for defining the name, and a newline.
3904 This macro controls how the assembler definitions of uninitialized global
3905 variables are output. This macro exists to properly support languages like
3906 `c++' which do not have `common' data. However, this macro currently is not
3907 defined for all targets. If this macro and `ASM_OUTPUT_ALIGNED_BSS' are not
3908 defined then `ASM_OUTPUT_COMMON' or `ASM_OUTPUT_ALIGNED_COMMON' or
3909 `ASM_OUTPUT_DECL_COMMON' is used. */
3910 /* #define ASM_OUTPUT_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */
3912 /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a separate,
3913 explicit argument. If you define this macro, it is used in place of
3914 `ASM_OUTPUT_BSS', and gives you more flexibility in handling the required
3915 alignment of the variable. The alignment is specified as the number of
3918 Try to use function `asm_output_aligned_bss' defined in file `varasm.c' when
3919 defining this macro. */
3920 /* #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGNMENT) */
3922 /* If defined, it is similar to `ASM_OUTPUT_BSS', except that it is used when
3923 NAME is shared. If not defined, `ASM_OUTPUT_BSS' will be used. */
3924 /* #define ASM_OUTPUT_SHARED_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */
3926 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
3927 assembler definition of a local-common-label named NAME whose size is SIZE
3928 bytes. The variable ROUNDED is the size rounded up to whatever alignment
3931 Use the expression `assemble_name (STREAM, NAME)' to output the name itself;
3932 before and after that, output the additional assembler syntax for defining
3933 the name, and a newline.
3935 This macro controls how the assembler definitions of uninitialized static
3936 variables are output. */
3937 /* #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) */
3939 /* Like `ASM_OUTPUT_LOCAL' except takes the required alignment as a separate,
3940 explicit argument. If you define this macro, it is used in place of
3941 `ASM_OUTPUT_LOCAL', and gives you more flexibility in handling the required
3942 alignment of the variable. The alignment is specified as the number of
3945 Defined in svr4.h. */
3946 /* #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGNMENT) */
3948 /* Like `ASM_OUTPUT_ALIGNED_LOCAL' except that it takes an additional
3949 parameter - the DECL of variable to be output, if there is one.
3950 This macro can be called with DECL == NULL_TREE. If you define
3951 this macro, it is used in place of `ASM_OUTPUT_LOCAL' and
3952 `ASM_OUTPUT_ALIGNED_LOCAL', and gives you more flexibility in
3953 handling the destination of the variable. */
3954 /* #define ASM_OUTPUT_DECL_LOCAL(STREAM, DECL, NAME, SIZE, ALIGNMENT) */
3956 /* If defined, it is similar to `ASM_OUTPUT_LOCAL', except that it is used when
3957 NAME is shared. If not defined, `ASM_OUTPUT_LOCAL' will be used. */
3958 /* #define ASM_OUTPUT_SHARED_LOCAL (STREAM, NAME, SIZE, ROUNDED) */
3961 /* Output and Generation of Labels. */
3963 /* A C statement (sans semicolon) to output to the stdio stream STREAM the
3964 assembler definition of a label named NAME. Use the expression
3965 `assemble_name (STREAM, NAME)' to output the name itself; before and after
3966 that, output the additional assembler syntax for defining the name, and a
3968 #define ASM_OUTPUT_LABEL(STREAM, NAME) \
3970 assemble_name (STREAM, NAME); \
3971 fputs (":\n", STREAM); \
3974 /* A C statement to output to the stdio stream STREAM the assembler
3975 definition of a symbol named SYMBOL. */
3976 #define ASM_OUTPUT_SYMBOL_REF(STREAM, SYMBOL) \
3978 if (SYMBOL_REF_FLAG (SYMBOL)) \
3980 fputs ("@fptr(", STREAM); \
3981 assemble_name (STREAM, XSTR (SYMBOL, 0)); \
3982 fputc (')', STREAM); \
3985 assemble_name (STREAM, XSTR (SYMBOL, 0)); \
3988 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
3989 necessary for declaring the name NAME of a function which is being defined.
3990 This macro is responsible for outputting the label definition (perhaps using
3991 `ASM_OUTPUT_LABEL'). The argument DECL is the `FUNCTION_DECL' tree node
3992 representing the function.
3994 If this macro is not defined, then the function name is defined in the usual
3995 manner as a label (by means of `ASM_OUTPUT_LABEL').
3997 Defined in svr4.h. */
3998 /* #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) */
4000 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4001 necessary for declaring the size of a function which is being defined. The
4002 argument NAME is the name of the function. The argument DECL is the
4003 `FUNCTION_DECL' tree node representing the function.
4005 If this macro is not defined, then the function size is not defined.
4007 Defined in svr4.h. */
4008 /* #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) */
4010 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4011 necessary for declaring the name NAME of an initialized variable which is
4012 being defined. This macro must output the label definition (perhaps using
4013 `ASM_OUTPUT_LABEL'). The argument DECL is the `VAR_DECL' tree node
4014 representing the variable.
4016 If this macro is not defined, then the variable name is defined in the usual
4017 manner as a label (by means of `ASM_OUTPUT_LABEL').
4019 Defined in svr4.h. */
4020 /* #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) */
4022 /* A C statement (sans semicolon) to finish up declaring a variable name once
4023 the compiler has processed its initializer fully and thus has had a chance
4024 to determine the size of an array when controlled by an initializer. This
4025 is used on systems where it's necessary to declare something about the size
4028 If you don't define this macro, that is equivalent to defining it to do
4031 Defined in svr4.h. */
4032 /* #define ASM_FINISH_DECLARE_OBJECT(STREAM, DECL, TOPLEVEL, ATEND) */
4034 /* A C statement (sans semicolon) to output to the stdio stream STREAM some
4035 commands that will make the label NAME global; that is, available for
4036 reference from other files. Use the expression `assemble_name (STREAM,
4037 NAME)' to output the name itself; before and after that, output the
4038 additional assembler syntax for making that name global, and a newline. */
4039 #define ASM_GLOBALIZE_LABEL(STREAM,NAME) \
4041 fputs ("\t.globl ", STREAM); \
4042 assemble_name (STREAM, NAME); \
4043 fputs ("\n", STREAM); \
4046 /* A C statement (sans semicolon) to output to the stdio stream STREAM some
4047 commands that will make the label NAME weak; that is, available for
4048 reference from other files but only used if no other definition is
4049 available. Use the expression `assemble_name (STREAM, NAME)' to output the
4050 name itself; before and after that, output the additional assembler syntax
4051 for making that name weak, and a newline.
4053 If you don't define this macro, GNU CC will not support weak symbols and you
4054 should not define the `SUPPORTS_WEAK' macro.
4056 Defined in svr4.h. */
4057 /* #define ASM_WEAKEN_LABEL */
4059 /* A C expression which evaluates to true if the target supports weak symbols.
4061 If you don't define this macro, `defaults.h' provides a default definition.
4062 If `ASM_WEAKEN_LABEL' is defined, the default definition is `1'; otherwise,
4063 it is `0'. Define this macro if you want to control weak symbol support
4064 with a compiler flag such as `-melf'. */
4065 /* #define SUPPORTS_WEAK */
4067 /* A C statement (sans semicolon) to mark DECL to be emitted as a
4068 public symbol such that extra copies in multiple translation units
4069 will be discarded by the linker. Define this macro if your object
4070 file format provides support for this concept, such as the `COMDAT'
4071 section flags in the Microsoft Windows PE/COFF format, and this
4072 support requires changes to DECL, such as putting it in a separate
4075 Defined in svr4.h. */
4076 /* #define MAKE_DECL_ONE_ONLY */
4078 /* A C expression which evaluates to true if the target supports one-only
4081 If you don't define this macro, `varasm.c' provides a default definition.
4082 If `MAKE_DECL_ONE_ONLY' is defined, the default definition is `1';
4083 otherwise, it is `0'. Define this macro if you want to control one-only
4084 symbol support with a compiler flag, or if setting the `DECL_ONE_ONLY' flag
4085 is enough to mark a declaration to be emitted as one-only. */
4086 /* #define SUPPORTS_ONE_ONLY */
4088 /* A C statement (sans semicolon) to output to the stdio stream STREAM any text
4089 necessary for declaring the name of an external symbol named NAME which is
4090 referenced in this compilation but not defined. The value of DECL is the
4091 tree node for the declaration.
4093 This macro need not be defined if it does not need to output anything. The
4094 GNU assembler and most Unix assemblers don't require anything. */
4095 /* #define ASM_OUTPUT_EXTERNAL(STREAM, DECL, NAME) */
4097 /* A C statement (sans semicolon) to output on STREAM an assembler pseudo-op to
4098 declare a library function name external. The name of the library function
4099 is given by SYMREF, which has type `rtx' and is a `symbol_ref'.
4101 This macro need not be defined if it does not need to output anything. The
4102 GNU assembler and most Unix assemblers don't require anything.
4104 Defined in svr4.h. */
4105 /* #define ASM_OUTPUT_EXTERNAL_LIBCALL(STREAM, SYMREF) */
4107 /* A C statement (sans semicolon) to output to the stdio stream STREAM a
4108 reference in assembler syntax to a label named NAME. This should add `_' to
4109 the front of the name, if that is customary on your operating system, as it
4110 is in most Berkeley Unix systems. This macro is used in `assemble_name'. */
4111 /* #define ASM_OUTPUT_LABELREF(STREAM, NAME) */
4113 /* A C statement to output to the stdio stream STREAM a label whose name is
4114 made from the string PREFIX and the number NUM.
4116 It is absolutely essential that these labels be distinct from the labels
4117 used for user-level functions and variables. Otherwise, certain programs
4118 will have name conflicts with internal labels.
4120 It is desirable to exclude internal labels from the symbol table of the
4121 object file. Most assemblers have a naming convention for labels that
4122 should be excluded; on many systems, the letter `L' at the beginning of a
4123 label has this effect. You should find out what convention your system
4124 uses, and follow it.
4126 The usual definition of this macro is as follows:
4128 fprintf (STREAM, "L%s%d:\n", PREFIX, NUM)
4130 Defined in svr4.h. */
4131 /* #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) */
4133 /* A C statement to store into the string STRING a label whose name is made
4134 from the string PREFIX and the number NUM.
4136 This string, when output subsequently by `assemble_name', should produce the
4137 output that `ASM_OUTPUT_INTERNAL_LABEL' would produce with the same PREFIX
4140 If the string begins with `*', then `assemble_name' will output the rest of
4141 the string unchanged. It is often convenient for
4142 `ASM_GENERATE_INTERNAL_LABEL' to use `*' in this way. If the string doesn't
4143 start with `*', then `ASM_OUTPUT_LABELREF' gets to output the string, and
4144 may change it. (Of course, `ASM_OUTPUT_LABELREF' is also part of your
4145 machine description, so you should know what it does on your machine.)
4147 Defined in svr4.h. */
4148 /* #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) */
4150 /* A C expression to assign to OUTVAR (which is a variable of type `char *') a
4151 newly allocated string made from the string NAME and the number NUMBER, with
4152 some suitable punctuation added. Use `alloca' to get space for the string.
4154 The string will be used as an argument to `ASM_OUTPUT_LABELREF' to produce
4155 an assembler label for an internal static variable whose name is NAME.
4156 Therefore, the string must be such as to result in valid assembler code.
4157 The argument NUMBER is different each time this macro is executed; it
4158 prevents conflicts between similarly-named internal static variables in
4161 Ideally this string should not be a valid C identifier, to prevent any
4162 conflict with the user's own symbols. Most assemblers allow periods or
4163 percent signs in assembler symbols; putting at least one of these between
4164 the name and the number will suffice. */
4165 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR, NAME, NUMBER) \
4167 (OUTVAR) = (char *) alloca (strlen ((NAME)) + 12); \
4168 sprintf ((OUTVAR), "%s.%ld", (NAME), (long)(NUMBER)); \
4171 /* A C statement to output to the stdio stream STREAM assembler code which
4172 defines (equates) the symbol NAME to have the value VALUE.
4174 If SET_ASM_OP is defined, a default definition is provided which is correct
4177 Defined in svr4.h. */
4178 /* #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) */
4180 /* A C statement to output to the stdio stream STREAM assembler code which
4181 defines (equates) the weak symbol NAME to have the value VALUE.
4183 Define this macro if the target only supports weak aliases; define
4184 ASM_OUTPUT_DEF instead if possible. */
4185 /* #define ASM_OUTPUT_WEAK_ALIAS (STREAM, NAME, VALUE) */
4187 /* Define this macro to override the default assembler names used for Objective
4190 The default name is a unique method number followed by the name of the class
4191 (e.g. `_1_Foo'). For methods in categories, the name of the category is
4192 also included in the assembler name (e.g. `_1_Foo_Bar').
4194 These names are safe on most systems, but make debugging difficult since the
4195 method's selector is not present in the name. Therefore, particular systems
4196 define other ways of computing names.
4198 BUF is an expression of type `char *' which gives you a buffer in which to
4199 store the name; its length is as long as CLASS_NAME, CAT_NAME and SEL_NAME
4200 put together, plus 50 characters extra.
4202 The argument IS_INST specifies whether the method is an instance method or a
4203 class method; CLASS_NAME is the name of the class; CAT_NAME is the name of
4204 the category (or NULL if the method is not in a category); and SEL_NAME is
4205 the name of the selector.
4207 On systems where the assembler can handle quoted names, you can use this
4208 macro to provide more human-readable names. */
4209 /* #define OBJC_GEN_METHOD_LABEL(BUF, IS_INST, CLASS_NAME, CAT_NAME, SEL_NAME) */
4212 /* Macros Controlling Initialization Routines. */
4214 /* If defined, a C string constant for the assembler operation to identify the
4215 following data as initialization code. If not defined, GNU CC will assume
4216 such a section does not exist. When you are using special sections for
4217 initialization and termination functions, this macro also controls how
4218 `crtstuff.c' and `libgcc2.c' arrange to run the initialization functions.
4220 Defined in svr4.h. */
4221 /* #define INIT_SECTION_ASM_OP */
4223 /* If defined, `main' will not call `__main' as described above. This macro
4224 should be defined for systems that control the contents of the init section
4225 on a symbol-by-symbol basis, such as OSF/1, and should not be defined
4226 explicitly for systems that support `INIT_SECTION_ASM_OP'. */
4227 /* #define HAS_INIT_SECTION */
4229 /* If defined, a C string constant for a switch that tells the linker that the
4230 following symbol is an initialization routine. */
4231 /* #define LD_INIT_SWITCH */
4233 /* If defined, a C string constant for a switch that tells the linker that the
4234 following symbol is a finalization routine. */
4235 /* #define LD_FINI_SWITCH */
4237 /* If defined, `main' will call `__main' despite the presence of
4238 `INIT_SECTION_ASM_OP'. This macro should be defined for systems where the
4239 init section is not actually run automatically, but is still useful for
4240 collecting the lists of constructors and destructors. */
4241 /* #define INVOKE__main */
4243 /* Define this macro as a C statement to output on the stream STREAM the
4244 assembler code to arrange to call the function named NAME at initialization
4247 Assume that NAME is the name of a C function generated automatically by the
4248 compiler. This function takes no arguments. Use the function
4249 `assemble_name' to output the name NAME; this performs any system-specific
4250 syntactic transformations such as adding an underscore.
4252 If you don't define this macro, nothing special is output to arrange to call
4253 the function. This is correct when the function will be called in some
4254 other manner--for example, by means of the `collect2' program, which looks
4255 through the symbol table to find these functions by their names.
4257 Defined in svr4.h. */
4258 /* #define ASM_OUTPUT_CONSTRUCTOR(STREAM, NAME) */
4260 /* This is like `ASM_OUTPUT_CONSTRUCTOR' but used for termination functions
4261 rather than initialization functions.
4263 Defined in svr4.h. */
4264 /* #define ASM_OUTPUT_DESTRUCTOR(STREAM, NAME) */
4266 /* If your system uses `collect2' as the means of processing constructors, then
4267 that program normally uses `nm' to scan an object file for constructor
4268 functions to be called. On certain kinds of systems, you can define these
4269 macros to make `collect2' work faster (and, in some cases, make it work at
4272 /* Define this macro if the system uses COFF (Common Object File Format) object
4273 files, so that `collect2' can assume this format and scan object files
4274 directly for dynamic constructor/destructor functions. */
4275 /* #define OBJECT_FORMAT_COFF */
4277 /* Define this macro if the system uses ROSE format object files, so that
4278 `collect2' can assume this format and scan object files directly for dynamic
4279 constructor/destructor functions.
4281 These macros are effective only in a native compiler; `collect2' as
4282 part of a cross compiler always uses `nm' for the target machine. */
4283 /* #define OBJECT_FORMAT_ROSE */
4285 /* Define this macro if the system uses ELF format object files.
4287 Defined in svr4.h. */
4288 /* #define OBJECT_FORMAT_ELF */
4290 /* Define this macro as a C string constant containing the file name to use to
4291 execute `nm'. The default is to search the path normally for `nm'.
4293 If your system supports shared libraries and has a program to list the
4294 dynamic dependencies of a given library or executable, you can define these
4295 macros to enable support for running initialization and termination
4296 functions in shared libraries: */
4297 /* #define REAL_NM_FILE_NAME */
4299 /* Define this macro to a C string constant containing the name of the program
4300 which lists dynamic dependencies, like `"ldd"' under SunOS 4. */
4301 /* #define LDD_SUFFIX */
4303 /* Define this macro to be C code that extracts filenames from the output of
4304 the program denoted by `LDD_SUFFIX'. PTR is a variable of type `char *'
4305 that points to the beginning of a line of output from `LDD_SUFFIX'. If the
4306 line lists a dynamic dependency, the code must advance PTR to the beginning
4307 of the filename on that line. Otherwise, it must set PTR to `NULL'. */
4308 /* #define PARSE_LDD_OUTPUT (PTR) */
4311 /* Output of Assembler Instructions. */
4313 /* A C initializer containing the assembler's names for the machine registers,
4314 each one as a C string constant. This is what translates register numbers
4315 in the compiler into assembler language. */
4316 #define REGISTER_NAMES \
4317 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", \
4318 "r11", "r12", "r13", "psw", "sp", "carry", "fp", "ap" }
4320 /* If defined, a C initializer for an array of structures containing a name and
4321 a register number. This macro defines additional names for hard registers,
4322 thus allowing the `asm' option in declarations to refer to registers using
4324 #define ADDITIONAL_REGISTER_NAMES \
4328 /* Define this macro if you are using an unusual assembler that requires
4329 different names for the machine instructions.
4331 The definition is a C statement or statements which output an assembler
4332 instruction opcode to the stdio stream STREAM. The macro-operand PTR is a
4333 variable of type `char *' which points to the opcode name in its "internal"
4334 form--the form that is written in the machine description. The definition
4335 should output the opcode name to STREAM, performing any translation you
4336 desire, and increment the variable PTR to point at the end of the opcode so
4337 that it will not be output twice.
4339 In fact, your macro definition may process less than the entire opcode name,
4340 or more than the opcode name; but if you want to process text that includes
4341 `%'-sequences to substitute operands, you must take care of the substitution
4342 yourself. Just be sure to increment PTR over whatever text should not be
4345 If you need to look at the operand values, they can be found as the elements
4346 of `recog_data.operand'.
4348 If the macro definition does nothing, the instruction is output in the usual
4350 /* #define ASM_OUTPUT_OPCODE(STREAM, PTR) */
4352 /* If defined, a C statement to be executed just prior to the output of
4353 assembler code for INSN, to modify the extracted operands so they will be
4356 Here the argument OPVEC is the vector containing the operands extracted from
4357 INSN, and NOPERANDS is the number of elements of the vector which contain
4358 meaningful data for this insn. The contents of this vector are what will be
4359 used to convert the insn template into assembler code, so you can change the
4360 assembler output by changing the contents of the vector.
4362 This macro is useful when various assembler syntaxes share a single file of
4363 instruction patterns; by defining this macro differently, you can cause a
4364 large class of instructions to be output differently (such as with
4365 rearranged operands). Naturally, variations in assembler syntax affecting
4366 individual insn patterns ought to be handled by writing conditional output
4367 routines in those patterns.
4369 If this macro is not defined, it is equivalent to a null statement. */
4370 /* #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) */
4372 /* If defined, `FINAL_PRESCAN_INSN' will be called on each
4373 `CODE_LABEL'. In that case, OPVEC will be a null pointer and
4374 NOPERANDS will be zero. */
4375 /* #define FINAL_PRESCAN_LABEL */
4377 /* A C compound statement to output to stdio stream STREAM the assembler syntax
4378 for an instruction operand X. X is an RTL expression.
4380 CODE is a value that can be used to specify one of several ways of printing
4381 the operand. It is used when identical operands must be printed differently
4382 depending on the context. CODE comes from the `%' specification that was
4383 used to request printing of the operand. If the specification was just
4384 `%DIGIT' then CODE is 0; if the specification was `%LTR DIGIT' then CODE is
4385 the ASCII code for LTR.
4387 If X is a register, this macro should print the register's name. The names
4388 can be found in an array `reg_names' whose type is `char *[]'. `reg_names'
4389 is initialized from `REGISTER_NAMES'.
4391 When the machine description has a specification `%PUNCT' (a `%' followed by
4392 a punctuation character), this macro is called with a null pointer for X and
4393 the punctuation character for CODE. */
4394 #define PRINT_OPERAND(STREAM, X, CODE) stormy16_print_operand (STREAM, X, CODE)
4396 /* A C expression which evaluates to true if CODE is a valid punctuation
4397 character for use in the `PRINT_OPERAND' macro. If
4398 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no punctuation
4399 characters (except for the standard one, `%') are used in this way. */
4400 /* #define PRINT_OPERAND_PUNCT_VALID_P(CODE) */
4402 /* A C compound statement to output to stdio stream STREAM the assembler syntax
4403 for an instruction operand that is a memory reference whose address is X. X
4404 is an RTL expression.
4406 On some machines, the syntax for a symbolic address depends on the section
4407 that the address refers to. On these machines, define the macro
4408 `ENCODE_SECTION_INFO' to store the information into the `symbol_ref', and
4409 then check for it here.
4411 This declaration must be present. */
4412 #define PRINT_OPERAND_ADDRESS(STREAM, X) stormy16_print_operand_address (STREAM, X)
4414 /* A C statement, to be executed after all slot-filler instructions have been
4415 output. If necessary, call `dbr_sequence_length' to determine the number of
4416 slots filled in a sequence (zero if not currently outputting a sequence), to
4417 decide how many no-ops to output, or whatever.
4419 Don't define this macro if it has nothing to do, but it is helpful in
4420 reading assembly output if the extent of the delay sequence is made explicit
4421 (e.g. with white space).
4423 Note that output routines for instructions with delay slots must be prepared
4424 to deal with not being output as part of a sequence (i.e. when the
4425 scheduling pass is not run, or when no slot fillers could be found.) The
4426 variable `final_sequence' is null when not processing a sequence, otherwise
4427 it contains the `sequence' rtx being output. */
4428 /* #define DBR_OUTPUT_SEQEND(FILE) */
4430 /* If defined, C string expressions to be used for the `%R', `%L', `%U', and
4431 `%I' options of `asm_fprintf' (see `final.c'). These are useful when a
4432 single `md' file must support multiple assembler formats. In that case, the
4433 various `tm.h' files can define these macros differently.
4435 USER_LABEL_PREFIX is defined in svr4.h. */
4436 #define REGISTER_PREFIX ""
4437 #define LOCAL_LABEL_PREFIX "."
4438 #define USER_LABEL_PREFIX ""
4439 #define IMMEDIATE_PREFIX "#"
4441 /* If your target supports multiple dialects of assembler language (such as
4442 different opcodes), define this macro as a C expression that gives the
4443 numeric index of the assembler language dialect to use, with zero as the
4446 If this macro is defined, you may use `{option0|option1|option2...}'
4447 constructs in the output templates of patterns or in the first argument of
4448 `asm_fprintf'. This construct outputs `option0', `option1' or `option2',
4449 etc., if the value of `ASSEMBLER_DIALECT' is zero, one or two, etc. Any
4450 special characters within these strings retain their usual meaning.
4452 If you do not define this macro, the characters `{', `|' and `}' do not have
4453 any special meaning when used in templates or operands to `asm_fprintf'.
4455 Define the macros `REGISTER_PREFIX', `LOCAL_LABEL_PREFIX',
4456 `USER_LABEL_PREFIX' and `IMMEDIATE_PREFIX' if you can express the variations
4457 in assemble language syntax with that mechanism. Define `ASSEMBLER_DIALECT'
4458 and use the `{option0|option1}' syntax if the syntax variant are larger and
4459 involve such things as different opcodes or operand order. */
4460 /* #define ASSEMBLER_DIALECT */
4462 /* A C expression to output to STREAM some assembler code which will push hard
4463 register number REGNO onto the stack. The code need not be optimal, since
4464 this macro is used only when profiling. */
4465 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \
4466 fprintf (STREAM, "\tpush %d\n", REGNO)
4468 /* A C expression to output to STREAM some assembler code which will pop hard
4469 register number REGNO off of the stack. The code need not be optimal, since
4470 this macro is used only when profiling. */
4471 #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \
4472 fprintf (STREAM, "\tpop %d\n", REGNO)
4475 /* Output of dispatch tables. */
4477 /* This port does not use the ASM_OUTPUT_ADDR_VEC_ELT macro, because
4478 this could cause label alignment to appear between the 'br' and the table,
4479 which would be bad. Instead, it controls the output of the table
4481 #define ASM_OUTPUT_ADDR_VEC(LABEL, BODY) \
4482 stormy16_output_addr_vec (file, LABEL, BODY)
4484 /* Alignment for ADDR_VECs is the same as for code. */
4485 #define ADDR_VEC_ALIGN(ADDR_VEC) 1
4488 /* Assembler Commands for Exception Regions. */
4490 /* A C expression to output text to mark the start of an exception region.
4492 This macro need not be defined on most platforms. */
4493 /* #define ASM_OUTPUT_EH_REGION_BEG() */
4495 /* A C expression to output text to mark the end of an exception region.
4497 This macro need not be defined on most platforms. */
4498 /* #define ASM_OUTPUT_EH_REGION_END() */
4500 /* A C expression to switch to the section in which the main exception table is
4501 to be placed. The default is a section named `.gcc_except_table' on machines
4502 that support named sections via `ASM_OUTPUT_SECTION_NAME', otherwise if `-fpic'
4503 or `-fPIC' is in effect, the `data_section', otherwise the
4504 `readonly_data_section'. */
4505 /* #define EXCEPTION_SECTION() */
4507 /* If defined, a C string constant for the assembler operation to switch to the
4508 section for exception handling frame unwind information. If not defined,
4509 GNU CC will provide a default definition if the target supports named
4510 sections. `crtstuff.c' uses this macro to switch to the appropriate
4513 You should define this symbol if your target supports DWARF 2 frame unwind
4514 information and the default definition does not work. */
4515 /* #define EH_FRAME_SECTION_ASM_OP */
4517 /* A C expression that is nonzero if the normal exception table output should
4520 This macro need not be defined on most platforms. */
4521 /* #define OMIT_EH_TABLE() */
4523 /* Alternate runtime support for looking up an exception at runtime and finding
4524 the associated handler, if the default method won't work.
4526 This macro need not be defined on most platforms. */
4527 /* #define EH_TABLE_LOOKUP() */
4529 /* A C expression that decides whether or not the current function needs to
4530 have a function unwinder generated for it. See the file `except.c' for
4531 details on when to define this, and how. */
4532 /* #define DOESNT_NEED_UNWINDER */
4534 /* An rtx used to mask the return address found via RETURN_ADDR_RTX, so that it
4535 does not contain any extraneous set bits in it. */
4536 /* #define MASK_RETURN_ADDR */
4538 /* Define this macro to 0 if your target supports DWARF 2 frame unwind
4539 information, but it does not yet work with exception handling. Otherwise,
4540 if your target supports this information (if it defines
4541 `INCOMING_RETURN_ADDR_RTX' and either `UNALIGNED_INT_ASM_OP' or
4542 `OBJECT_FORMAT_ELF'), GCC will provide a default definition of 1.
4544 If this macro is defined to 1, the DWARF 2 unwinder will be the default
4545 exception handling mechanism; otherwise, setjmp/longjmp will be used by
4548 If this macro is defined to anything, the DWARF 2 unwinder will be used
4549 instead of inline unwinders and __unwind_function in the non-setjmp case. */
4550 #define DWARF2_UNWIND_INFO 0
4552 /* Don't use __builtin_setjmp for unwinding, since it's tricky to get
4553 at the high 16 bits of an address. */
4554 #define DONT_USE_BUILTIN_SETJMP
4555 #define JMP_BUF_SIZE 8
4557 /* Assembler Commands for Alignment. */
4559 /* The alignment (log base 2) to put in front of LABEL, which follows
4562 This macro need not be defined if you don't want any special alignment to be
4563 done at such a time. Most machine descriptions do not currently define the
4565 /* #define LABEL_ALIGN_AFTER_BARRIER(LABEL) */
4567 /* The desired alignment for the location counter at the beginning
4570 This macro need not be defined if you don't want any special alignment to be
4571 done at such a time. Most machine descriptions do not currently define the
4573 /* #define LOOP_ALIGN(LABEL) */
4575 /* A C statement to output to the stdio stream STREAM an assembler instruction
4576 to advance the location counter by NBYTES bytes. Those bytes should be zero
4577 when loaded. NBYTES will be a C expression of type `int'.
4579 Defined in elfos.h. */
4580 /* #define ASM_OUTPUT_SKIP(STREAM, NBYTES) */
4582 /* Define this macro if `ASM_OUTPUT_SKIP' should not be used in the text
4583 section because it fails put zeros in the bytes that are skipped. This is
4584 true on many Unix systems, where the pseudo-op to skip bytes produces no-op
4585 instructions rather than zeros when used in the text section. */
4586 /* #define ASM_NO_SKIP_IN_TEXT */
4588 /* A C statement to output to the stdio stream STREAM an assembler command to
4589 advance the location counter to a multiple of 2 to the POWER bytes. POWER
4590 will be a C expression of type `int'. */
4591 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
4592 fprintf ((STREAM), "\t.p2align %d\n", (POWER))
4595 /* Macros Affecting all Debug Formats. */
4597 /* A C expression that returns the DBX register number for the compiler
4598 register number REGNO. In simple cases, the value of this expression may be
4599 REGNO itself. But sometimes there are some registers that the compiler
4600 knows about and DBX does not, or vice versa. In such cases, some register
4601 may need to have one number in the compiler and another for DBX.
4603 If two registers have consecutive numbers inside GNU CC, and they can be
4604 used as a pair to hold a multiword value, then they *must* have consecutive
4605 numbers after renumbering with `DBX_REGISTER_NUMBER'. Otherwise, debuggers
4606 will be unable to access such a pair, because they expect register pairs to
4607 be consecutive in their own numbering scheme.
4609 If you find yourself defining `DBX_REGISTER_NUMBER' in way that does not
4610 preserve register pairs, then what you must do instead is redefine the
4611 actual register numbering scheme.
4613 This declaration is required. */
4614 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
4616 /* A C expression that returns the integer offset value for an automatic
4617 variable having address X (an RTL expression). The default computation
4618 assumes that X is based on the frame-pointer and gives the offset from the
4619 frame-pointer. This is required for targets that produce debugging output
4620 for DBX or COFF-style debugging output for SDB and allow the frame-pointer
4621 to be eliminated when the `-g' options is used. */
4622 /* #define DEBUGGER_AUTO_OFFSET(X) */
4624 /* A C expression that returns the integer offset value for an argument having
4625 address X (an RTL expression). The nominal offset is OFFSET. */
4626 /* #define DEBUGGER_ARG_OFFSET(OFFSET, X) */
4628 /* A C expression that returns the type of debugging output GNU CC produces
4629 when the user specifies `-g' or `-ggdb'. Define this if you have arranged
4630 for GNU CC to support more than one format of debugging output. Currently,
4631 the allowable values are `DBX_DEBUG', `SDB_DEBUG', `DWARF_DEBUG',
4632 `DWARF2_DEBUG', and `XCOFF_DEBUG'.
4634 The value of this macro only affects the default debugging output; the user
4635 can always get a specific type of output by using `-gstabs', `-gcoff',
4636 `-gdwarf-1', `-gdwarf-2', or `-gxcoff'.
4638 Defined in svr4.h. */
4639 #undef PREFERRED_DEBUGGING_TYPE
4640 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
4643 /* Specific Options for DBX Output. */
4645 /* Define this macro if GNU CC should produce debugging output for DBX in
4646 response to the `-g' option.
4648 Defined in svr4.h. */
4649 /* #define DBX_DEBUGGING_INFO */
4651 /* Define this macro if GNU CC should produce XCOFF format debugging output in
4652 response to the `-g' option. This is a variant of DBX format. */
4653 /* #define XCOFF_DEBUGGING_INFO */
4655 /* Define this macro to control whether GNU CC should by default generate GDB's
4656 extended version of DBX debugging information (assuming DBX-format debugging
4657 information is enabled at all). If you don't define the macro, the default
4658 is 1: always generate the extended information if there is any occasion to. */
4659 /* #define DEFAULT_GDB_EXTENSIONS */
4661 /* Define this macro if all `.stabs' commands should be output while in the
4663 /* #define DEBUG_SYMS_TEXT */
4665 /* A C string constant naming the assembler pseudo op to use instead of
4666 `.stabs' to define an ordinary debugging symbol. If you don't define this
4667 macro, `.stabs' is used. This macro applies only to DBX debugging
4668 information format. */
4669 /* #define ASM_STABS_OP */
4671 /* A C string constant naming the assembler pseudo op to use instead of
4672 `.stabd' to define a debugging symbol whose value is the current location.
4673 If you don't define this macro, `.stabd' is used. This macro applies only
4674 to DBX debugging information format. */
4675 /* #define ASM_STABD_OP */
4677 /* A C string constant naming the assembler pseudo op to use instead of
4678 `.stabn' to define a debugging symbol with no name. If you don't define
4679 this macro, `.stabn' is used. This macro applies only to DBX debugging
4680 information format. */
4681 /* #define ASM_STABN_OP */
4683 /* Define this macro if DBX on your system does not support the construct
4684 `xsTAGNAME'. On some systems, this construct is used to describe a forward
4685 reference to a structure named TAGNAME. On other systems, this construct is
4686 not supported at all. */
4687 /* #define DBX_NO_XREFS */
4689 /* A symbol name in DBX-format debugging information is normally continued
4690 (split into two separate `.stabs' directives) when it exceeds a certain
4691 length (by default, 80 characters). On some operating systems, DBX requires
4692 this splitting; on others, splitting must not be done. You can inhibit
4693 splitting by defining this macro with the value zero. You can override the
4694 default splitting-length by defining this macro as an expression for the
4695 length you desire. */
4696 /* #define DBX_CONTIN_LENGTH */
4698 /* Normally continuation is indicated by adding a `\' character to the end of a
4699 `.stabs' string when a continuation follows. To use a different character
4700 instead, define this macro as a character constant for the character you
4701 want to use. Do not define this macro if backslash is correct for your
4703 /* #define DBX_CONTIN_CHAR */
4705 /* Define this macro if it is necessary to go to the data section before
4706 outputting the `.stabs' pseudo-op for a non-global static variable. */
4707 /* #define DBX_STATIC_STAB_DATA_SECTION */
4709 /* The value to use in the "code" field of the `.stabs' directive for a
4710 typedef. The default is `N_LSYM'. */
4711 /* #define DBX_TYPE_DECL_STABS_CODE */
4713 /* The value to use in the "code" field of the `.stabs' directive for a static
4714 variable located in the text section. DBX format does not provide any
4715 "right" way to do this. The default is `N_FUN'. */
4716 /* #define DBX_STATIC_CONST_VAR_CODE */
4718 /* The value to use in the "code" field of the `.stabs' directive for a
4719 parameter passed in registers. DBX format does not provide any "right" way
4720 to do this. The default is `N_RSYM'. */
4721 /* #define DBX_REGPARM_STABS_CODE */
4723 /* The letter to use in DBX symbol data to identify a symbol as a parameter
4724 passed in registers. DBX format does not customarily provide any way to do
4725 this. The default is `'P''. */
4726 /* #define DBX_REGPARM_STABS_LETTER */
4728 /* The letter to use in DBX symbol data to identify a symbol as a stack
4729 parameter. The default is `'p''. */
4730 /* #define DBX_MEMPARM_STABS_LETTER */
4732 /* Define this macro if the DBX information for a function and its arguments
4733 should precede the assembler code for the function. Normally, in DBX
4734 format, the debugging information entirely follows the assembler code.
4736 Defined in svr4.h. */
4737 /* #define DBX_FUNCTION_FIRST */
4739 /* Define this macro if the `N_LBRAC' symbol for a block should precede the
4740 debugging information for variables and functions defined in that block.
4741 Normally, in DBX format, the `N_LBRAC' symbol comes first. */
4742 /* #define DBX_LBRAC_FIRST */
4744 /* Define this macro if the value of a symbol describing the scope of a block
4745 (`N_LBRAC' or `N_RBRAC') should be relative to the start of the enclosing
4746 function. Normally, GNU C uses an absolute address.
4748 Defined in svr4.h. */
4749 /* #define DBX_BLOCKS_FUNCTION_RELATIVE */
4751 /* Define this macro if GNU C should generate `N_BINCL' and `N_EINCL'
4752 stabs for included header files, as on Sun systems. This macro
4753 also directs GNU C to output a type number as a pair of a file
4754 number and a type number within the file. Normally, GNU C does not
4755 generate `N_BINCL' or `N_EINCL' stabs, and it outputs a single
4756 number for a type number. */
4757 /* #define DBX_USE_BINCL */
4760 /* Open ended Hooks for DBX Output. */
4762 /* Define this macro to say how to output to STREAM the debugging information
4763 for the start of a scope level for variable names. The argument NAME is the
4764 name of an assembler symbol (for use with `assemble_name') whose value is
4765 the address where the scope begins. */
4766 /* #define DBX_OUTPUT_LBRAC(STREAM, NAME) */
4768 /* Like `DBX_OUTPUT_LBRAC', but for the end of a scope level. */
4769 /* #define DBX_OUTPUT_RBRAC(STREAM, NAME) */
4771 /* Define this macro if the target machine requires special handling to output
4772 an enumeration type. The definition should be a C statement (sans
4773 semicolon) to output the appropriate information to STREAM for the type
4775 /* #define DBX_OUTPUT_ENUM(STREAM, TYPE) */
4777 /* Define this macro if the target machine requires special output at the end
4778 of the debugging information for a function. The definition should be a C
4779 statement (sans semicolon) to output the appropriate information to STREAM.
4780 FUNCTION is the `FUNCTION_DECL' node for the function. */
4781 /* #define DBX_OUTPUT_FUNCTION_END(STREAM, FUNCTION) */
4783 /* Define this macro if you need to control the order of output of the standard
4784 data types at the beginning of compilation. The argument SYMS is a `tree'
4785 which is a chain of all the predefined global symbols, including names of
4788 Normally, DBX output starts with definitions of the types for integers and
4789 characters, followed by all the other predefined types of the particular
4790 language in no particular order.
4792 On some machines, it is necessary to output different particular types
4793 first. To do this, define `DBX_OUTPUT_STANDARD_TYPES' to output those
4794 symbols in the necessary order. Any predefined types that you don't
4795 explicitly output will be output afterward in no particular order.
4797 Be careful not to define this macro so that it works only for C. There are
4798 no global variables to access most of the built-in types, because another
4799 language may have another set of types. The way to output a particular type
4800 is to look through SYMS to see if you can find it. Here is an example:
4804 for (decl = syms; decl; decl = TREE_CHAIN (decl))
4805 if (!strcmp (IDENTIFIER_POINTER (DECL_NAME (decl)),
4807 dbxout_symbol (decl);
4811 This does nothing if the expected type does not exist.
4813 See the function `init_decl_processing' in `c-decl.c' to find the names to
4814 use for all the built-in C types. */
4815 /* #define DBX_OUTPUT_STANDARD_TYPES(SYMS) */
4817 /* Some stabs encapsulation formats (in particular ECOFF), cannot
4818 handle the `.stabs "",N_FUN,,0,0,Lscope-function-1' gdb dbx
4819 extention construct. On those machines, define this macro to turn
4820 this feature off without disturbing the rest of the gdb extensions. */
4821 /* #define NO_DBX_FUNCTION_END */
4824 /* File names in DBX format. */
4826 /* Define this if DBX wants to have the current directory recorded in each
4829 Note that the working directory is always recorded if GDB extensions are
4831 /* #define DBX_WORKING_DIRECTORY */
4833 /* A C statement to output DBX debugging information to the stdio stream STREAM
4834 which indicates that file NAME is the main source file--the file specified
4835 as the input file for compilation. This macro is called only once, at the
4836 beginning of compilation.
4838 This macro need not be defined if the standard form of output for DBX
4839 debugging information is appropriate.
4841 Defined in svr4.h. */
4842 /* #define DBX_OUTPUT_MAIN_SOURCE_FILENAME(STREAM, NAME) */
4844 /* A C statement to output DBX debugging information to the stdio stream STREAM
4845 which indicates that the current directory during compilation is named NAME.
4847 This macro need not be defined if the standard form of output for DBX
4848 debugging information is appropriate. */
4849 /* #define DBX_OUTPUT_MAIN_SOURCE_DIRECTORY(STREAM, NAME) */
4851 /* A C statement to output DBX debugging information at the end of compilation
4852 of the main source file NAME.
4854 If you don't define this macro, nothing special is output at the end of
4855 compilation, which is correct for most machines. */
4856 /* #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(STREAM, NAME) */
4858 /* A C statement to output DBX debugging information to the stdio stream STREAM
4859 which indicates that file NAME is the current source file. This output is
4860 generated each time input shifts to a different source file as a result of
4861 `#include', the end of an included file, or a `#line' command.
4863 This macro need not be defined if the standard form of output for DBX
4864 debugging information is appropriate. */
4865 /* #define DBX_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */
4868 /* Macros for SDB and Dwarf Output. */
4870 /* Define this macro if GNU CC should produce COFF-style debugging output for
4871 SDB in response to the `-g' option. */
4872 /* #define SDB_DEBUGGING_INFO */
4874 /* Define this macro if GNU CC should produce dwarf format debugging output in
4875 response to the `-g' option.
4877 Defined in svr4.h. */
4878 /* #define DWARF_DEBUGGING_INFO */
4880 /* Define this macro if GNU CC should produce dwarf version 2 format debugging
4881 output in response to the `-g' option.
4883 To support optional call frame debugging information, you must also define
4884 `INCOMING_RETURN_ADDR_RTX' and either set `RTX_FRAME_RELATED_P' on the
4885 prologue insns if you use RTL for the prologue, or call `dwarf2out_def_cfa'
4886 and `dwarf2out_reg_save' as appropriate from `TARGET_ASM_FUNCTION_PROLOGUE'
4889 Defined in svr4.h. */
4890 /* #define DWARF2_DEBUGGING_INFO */
4892 /* Define this macro if GNU CC should produce dwarf version 2-style
4893 line numbers. This usually requires extending the assembler to
4894 support them, and #defining DWARF2_LINE_MIN_INSN_LENGTH in the
4895 assembler configuration header files. */
4896 /* #define DWARF2_ASM_LINE_DEBUG_INFO 1 */
4898 /* Define this macro if addresses in Dwarf 2 debugging info should not
4899 be the same size as pointers on the target architecture. The
4900 macro's value should be the size, in bytes, to use for addresses in
4903 Some architectures use word addresses to refer to code locations,
4904 but Dwarf 2 info always uses byte addresses. On such machines,
4905 Dwarf 2 addresses need to be larger than the architecture's
4907 #define DWARF2_ADDR_SIZE 4
4909 /* Define these macros to override the assembler syntax for the special SDB
4910 assembler directives. See `sdbout.c' for a list of these macros and their
4911 arguments. If the standard syntax is used, you need not define them
4913 /* #define PUT_SDB_... */
4915 /* Some assemblers do not support a semicolon as a delimiter, even between SDB
4916 assembler directives. In that case, define this macro to be the delimiter
4917 to use (usually `\n'). It is not necessary to define a new set of
4918 `PUT_SDB_OP' macros if this is the only change required. */
4919 /* #define SDB_DELIM */
4921 /* Define this macro to override the usual method of constructing a dummy name
4922 for anonymous structure and union types. See `sdbout.c' for more
4924 /* #define SDB_GENERATE_FAKE */
4926 /* Define this macro to allow references to unknown structure, union, or
4927 enumeration tags to be emitted. Standard COFF does not allow handling of
4928 unknown references, MIPS ECOFF has support for it. */
4929 /* #define SDB_ALLOW_UNKNOWN_REFERENCES */
4931 /* Define this macro to allow references to structure, union, or enumeration
4932 tags that have not yet been seen to be handled. Some assemblers choke if
4933 forward tags are used, while some require it. */
4934 /* #define SDB_ALLOW_FORWARD_REFERENCES */
4937 /* Miscellaneous Parameters. */
4939 /* Define REAL_ARITHMETIC to use a software emulator for the target floating
4940 point mode. Otherwise the host floating point mode is used. */
4941 #define REAL_ARITHMETIC
4943 /* Define this if you have defined special-purpose predicates in the file
4944 `MACHINE.c'. This macro is called within an initializer of an array of
4945 structures. The first field in the structure is the name of a predicate and
4946 the second field is an array of rtl codes. For each predicate, list all rtl
4947 codes that can be in expressions matched by the predicate. The list should
4948 have a trailing comma. Here is an example of two entries in the list for a
4949 typical RISC machine:
4951 #define PREDICATE_CODES \
4952 {"gen_reg_rtx_operand", {SUBREG, REG}}, \
4953 {"reg_or_short_cint_operand", {SUBREG, REG, CONST_INT}},
4955 Defining this macro does not affect the generated code (however, incorrect
4956 definitions that omit an rtl code that may be matched by the predicate can
4957 cause the compiler to malfunction). Instead, it allows the table built by
4958 `genrecog' to be more compact and efficient, thus speeding up the compiler.
4959 The most important predicates to include in the list specified by this macro
4960 are thoses used in the most insn patterns. */
4961 #define PREDICATE_CODES \
4962 {"shift_operator", {ASHIFT, ASHIFTRT, LSHIFTRT }}, \
4963 {"equality_operator", {EQ, NE }}, \
4964 {"inequality_operator", {GE, GT, LE, LT, GEU, GTU, LEU, LTU }}, \
4965 {"stormy16_ineqsi_operator", {LT, GE, LTU, GEU }},
4967 /* An alias for a machine mode name. This is the machine mode that elements of
4968 a jump-table should have. */
4969 #define CASE_VECTOR_MODE SImode
4971 /* Define as C expression which evaluates to nonzero if the tablejump
4972 instruction expects the table to contain offsets from the address of the
4974 Do not define this if the table should contain absolute addresses. */
4975 /* #define CASE_VECTOR_PC_RELATIVE 1 */
4977 /* Define this if control falls through a `case' insn when the index value is
4978 out of range. This means the specified default-label is actually ignored by
4979 the `case' insn proper. */
4980 /* #define CASE_DROPS_THROUGH */
4982 /* Define this to be the smallest number of different values for which it is
4983 best to use a jump-table instead of a tree of conditional branches. The
4984 default is four for machines with a `casesi' instruction and five otherwise.
4985 This is best for most machines. */
4986 /* #define CASE_VALUES_THRESHOLD */
4988 /* Define this macro if operations between registers with integral mode smaller
4989 than a word are always performed on the entire register. Most RISC machines
4990 have this property and most CISC machines do not. */
4991 #define WORD_REGISTER_OPERATIONS
4993 /* Define this macro to be a C expression indicating when insns that read
4994 memory in MODE, an integral mode narrower than a word, set the bits outside
4995 of MODE to be either the sign-extension or the zero-extension of the data
4996 read. Return `SIGN_EXTEND' for values of MODE for which the insn
4997 sign-extends, `ZERO_EXTEND' for which it zero-extends, and `NIL' for other
5000 This macro is not called with MODE non-integral or with a width greater than
5001 or equal to `BITS_PER_WORD', so you may return any value in this case. Do
5002 not define this macro if it would always return `NIL'. On machines where
5003 this macro is defined, you will normally define it as the constant
5004 `SIGN_EXTEND' or `ZERO_EXTEND'. */
5005 #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND
5007 /* Define if loading short immediate values into registers sign extends. */
5008 /* #define SHORT_IMMEDIATES_SIGN_EXTEND */
5010 /* An alias for a tree code that should be used by default for conversion of
5011 floating point values to fixed point. Normally, `FIX_ROUND_EXPR' is used. */
5012 /* #define IMPLICIT_FIX_EXPR */
5014 /* Define this macro if the same instructions that convert a floating point
5015 number to a signed fixed point number also convert validly to an unsigned
5017 /* #define FIXUNS_TRUNC_LIKE_FIX_TRUNC */
5019 /* An alias for a tree code that is the easiest kind of division to compile
5020 code for in the general case. It may be `TRUNC_DIV_EXPR', `FLOOR_DIV_EXPR',
5021 `CEIL_DIV_EXPR' or `ROUND_DIV_EXPR'. These four division operators differ
5022 in how they round the result to an integer. `EASY_DIV_EXPR' is used when it
5023 is permissible to use any of those kinds of division and the choice should
5024 be made on the basis of efficiency. */
5025 #define EASY_DIV_EXPR TRUNC_DIV_EXPR
5027 /* The maximum number of bytes that a single instruction can move quickly from
5028 memory to memory. */
5031 /* The maximum number of bytes that a single instruction can move quickly from
5032 memory to memory. If this is undefined, the default is `MOVE_MAX'.
5033 Otherwise, it is the constant value that is the largest value that
5034 `MOVE_MAX' can have at run-time. */
5035 /* #define MAX_MOVE_MAX */
5037 /* A C expression that is nonzero if on this machine the number of bits
5038 actually used for the count of a shift operation is equal to the number of
5039 bits needed to represent the size of the object being shifted. When this
5040 macro is non-zero, the compiler will assume that it is safe to omit a
5041 sign-extend, zero-extend, and certain bitwise `and' instructions that
5042 truncates the count of a shift operation. On machines that have
5043 instructions that act on bitfields at variable positions, which may include
5044 `bit test' instructions, a nonzero `SHIFT_COUNT_TRUNCATED' also enables
5045 deletion of truncations of the values that serve as arguments to bitfield
5048 If both types of instructions truncate the count (for shifts) and position
5049 (for bitfield operations), or if no variable-position bitfield instructions
5050 exist, you should define this macro.
5052 However, on some machines, such as the 80386 and the 680x0, truncation only
5053 applies to shift operations and not the (real or pretended) bitfield
5054 operations. Define `SHIFT_COUNT_TRUNCATED' to be zero on such machines.
5055 Instead, add patterns to the `md' file that include the implied truncation
5056 of the shift instructions.
5058 You need not define this macro if it would always have the value of zero. */
5059 #define SHIFT_COUNT_TRUNCATED 1
5061 /* A C expression which is nonzero if on this machine it is safe to "convert"
5062 an integer of INPREC bits to one of OUTPREC bits (where OUTPREC is smaller
5063 than INPREC) by merely operating on it as if it had only OUTPREC bits.
5065 On many machines, this expression can be 1.
5067 When `TRULY_NOOP_TRUNCATION' returns 1 for a pair of sizes for modes for
5068 which `MODES_TIEABLE_P' is 0, suboptimal code can result. If this is the
5069 case, making `TRULY_NOOP_TRUNCATION' return 0 in such cases may improve
5071 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
5073 /* A C expression describing the value returned by a comparison operator with
5074 an integral mode and stored by a store-flag instruction (`sCOND') when the
5075 condition is true. This description must apply to *all* the `sCOND'
5076 patterns and all the comparison operators whose results have a `MODE_INT'
5079 A value of 1 or -1 means that the instruction implementing the comparison
5080 operator returns exactly 1 or -1 when the comparison is true and 0 when the
5081 comparison is false. Otherwise, the value indicates which bits of the
5082 result are guaranteed to be 1 when the comparison is true. This value is
5083 interpreted in the mode of the comparison operation, which is given by the
5084 mode of the first operand in the `sCOND' pattern. Either the low bit or the
5085 sign bit of `STORE_FLAG_VALUE' be on. Presently, only those bits are used
5088 If `STORE_FLAG_VALUE' is neither 1 or -1, the compiler will generate code
5089 that depends only on the specified bits. It can also replace comparison
5090 operators with equivalent operations if they cause the required bits to be
5091 set, even if the remaining bits are undefined. For example, on a machine
5092 whose comparison operators return an `SImode' value and where
5093 `STORE_FLAG_VALUE' is defined as `0x80000000', saying that just the sign bit
5094 is relevant, the expression
5096 (ne:SI (and:SI X (const_int POWER-OF-2)) (const_int 0))
5100 (ashift:SI X (const_int N))
5102 where N is the appropriate shift count to move the bit being tested into the
5105 There is no way to describe a machine that always sets the low-order bit for
5106 a true value, but does not guarantee the value of any other bits, but we do
5107 not know of any machine that has such an instruction. If you are trying to
5108 port GNU CC to such a machine, include an instruction to perform a
5109 logical-and of the result with 1 in the pattern for the comparison operators
5112 Often, a machine will have multiple instructions that obtain a value from a
5113 comparison (or the condition codes). Here are rules to guide the choice of
5114 value for `STORE_FLAG_VALUE', and hence the instructions to be used:
5116 * Use the shortest sequence that yields a valid definition for
5117 `STORE_FLAG_VALUE'. It is more efficient for the compiler to
5118 "normalize" the value (convert it to, e.g., 1 or 0) than for
5119 the comparison operators to do so because there may be
5120 opportunities to combine the normalization with other
5123 * For equal-length sequences, use a value of 1 or -1, with -1
5124 being slightly preferred on machines with expensive jumps and
5125 1 preferred on other machines.
5127 * As a second choice, choose a value of `0x80000001' if
5128 instructions exist that set both the sign and low-order bits
5129 but do not define the others.
5131 * Otherwise, use a value of `0x80000000'.
5133 Many machines can produce both the value chosen for `STORE_FLAG_VALUE' and
5134 its negation in the same number of instructions. On those machines, you
5135 should also define a pattern for those cases, e.g., one matching
5137 (set A (neg:M (ne:M B C)))
5139 Some machines can also perform `and' or `plus' operations on condition code
5140 values with less instructions than the corresponding `sCOND' insn followed
5141 by `and' or `plus'. On those machines, define the appropriate patterns.
5142 Use the names `incscc' and `decscc', respectively, for the the patterns
5143 which perform `plus' or `minus' operations on condition code values. See
5144 `rs6000.md' for some examples. The GNU Superoptizer can be used to find
5145 such instruction sequences on other machines.
5147 You need not define `STORE_FLAG_VALUE' if the machine has no store-flag
5149 /* #define STORE_FLAG_VALUE */
5151 /* A C expression that gives a non-zero floating point value that is returned
5152 when comparison operators with floating-point results are true. Define this
5153 macro on machine that have comparison operations that return floating-point
5154 values. If there are no such operations, do not define this macro. */
5155 /* #define FLOAT_STORE_FLAG_VALUE */
5157 /* An alias for the machine mode for pointers. On most machines, define this
5158 to be the integer mode corresponding to the width of a hardware pointer;
5159 `SImode' on 32-bit machine or `DImode' on 64-bit machines. On some machines
5160 you must define this to be one of the partial integer modes, such as
5163 The width of `Pmode' must be at least as large as the value of
5164 `POINTER_SIZE'. If it is not equal, you must define the macro
5165 `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to `Pmode'. */
5166 #define Pmode HImode
5168 /* An alias for the machine mode used for memory references to functions being
5169 called, in `call' RTL expressions. On most machines this should be
5171 #define FUNCTION_MODE HImode
5173 /* A C expression for the maximum number of instructions above which the
5174 function DECL should not be inlined. DECL is a `FUNCTION_DECL' node.
5176 The default definition of this macro is 64 plus 8 times the number of
5177 arguments that the function accepts. Some people think a larger threshold
5178 should be used on RISC machines. */
5179 /* #define INTEGRATE_THRESHOLD(DECL) */
5181 /* Define this if the preprocessor should ignore `#sccs' directives and print
5184 Defined in svr4.h. */
5185 /* #define SCCS_DIRECTIVE */
5187 /* Define this macro if the system header files support C++ as well as C. This
5188 macro inhibits the usual method of using system header files in C++, which
5189 is to pretend that the file's contents are enclosed in `extern "C" {...}'. */
5190 #define NO_IMPLICIT_EXTERN_C
5192 /* Define this macro if you want to implement any pragmas. If defined, it
5193 should be a C expression to be executed when #pragma is seen. The
5194 argument GETC is a function which will return the next character in the
5195 input stream, or EOF if no characters are left. The argument UNGETC is
5196 a function which will push a character back into the input stream. The
5197 argument NAME is the word following #pragma in the input stream. The input
5198 stream pointer will be pointing just beyond the end of this word. The
5199 expression should return true if it handled the pragma, false otherwise.
5200 The input stream should be left undistrubed if false is returned, otherwise
5201 it should be pointing at the next character after the end of the pragma.
5202 Any characters left between the end of the pragma and the end of the line will
5205 It is generally a bad idea to implement new uses of `#pragma'. The only
5206 reason to define this macro is for compatibility with other compilers that
5207 do support `#pragma' for the sake of any user programs which already use it. */
5208 /* #define HANDLE_PRAGMA(GETC, UNGETC, NAME) handle_pragma (GETC, UNGETC, NAME) */
5210 /* Define this macro to handle System V style pragmas: #pragma pack and
5211 #pragma weak. Note, #pragma weak will only be supported if SUPPORT_WEAK is
5214 Defined in svr4.h. */
5215 #define HANDLE_SYSV_PRAGMA
5217 /* Define this macro if you want to support the Win32 style pragmas
5218 #pragma pack(push,<n>) and #pragma pack(pop). */
5219 /* HANDLE_PRAGMA_PACK_PUSH_POP 1 */
5221 /* Define this macro to control use of the character `$' in identifier names.
5222 The value should be 0, 1, or 2. 0 means `$' is not allowed by default; 1
5223 means it is allowed by default if `-traditional' is used; 2 means it is
5224 allowed by default provided `-ansi' is not used. 1 is the default; there is
5225 no need to define this macro in that case. */
5226 /* #define DOLLARS_IN_IDENTIFIERS */
5228 /* Define this macro if the assembler does not accept the character `$' in
5229 label names. By default constructors and destructors in G++ have `$' in the
5230 identifiers. If this macro is defined, `.' is used instead.
5232 Defined in svr4.h. */
5233 /* #define NO_DOLLAR_IN_LABEL */
5235 /* Define this macro if the assembler does not accept the character `.' in
5236 label names. By default constructors and destructors in G++ have names that
5237 use `.'. If this macro is defined, these names are rewritten to avoid `.'. */
5238 /* #define NO_DOT_IN_LABEL */
5240 /* Define this macro if the target system expects every program's `main'
5241 function to return a standard "success" value by default (if no other value
5242 is explicitly returned).
5244 The definition should be a C statement (sans semicolon) to generate the
5245 appropriate rtl instructions. It is used only when compiling the end of
5247 /* #define DEFAULT_MAIN_RETURN */
5249 /* Define this if the target system supports the function `atexit' from the
5250 ANSI C standard. If this is not defined, and `INIT_SECTION_ASM_OP' is not
5251 defined, a default `exit' function will be provided to support C++.
5253 Defined by svr4.h */
5254 /* #define HAVE_ATEXIT */
5256 /* Define this if your `exit' function needs to do something besides calling an
5257 external function `_cleanup' before terminating with `_exit'. The
5258 `EXIT_BODY' macro is only needed if netiher `HAVE_ATEXIT' nor
5259 `INIT_SECTION_ASM_OP' are defined. */
5260 /* #define EXIT_BODY */
5262 /* Define this macro as a C expression that is nonzero if it is safe for the
5263 delay slot scheduler to place instructions in the delay slot of INSN, even
5264 if they appear to use a resource set or clobbered in INSN. INSN is always a
5265 `jump_insn' or an `insn'; GNU CC knows that every `call_insn' has this
5266 behavior. On machines where some `insn' or `jump_insn' is really a function
5267 call and hence has this behavior, you should define this macro.
5269 You need not define this macro if it would always return zero. */
5270 /* #define INSN_SETS_ARE_DELAYED(INSN) */
5272 /* Define this macro as a C expression that is nonzero if it is safe for the
5273 delay slot scheduler to place instructions in the delay slot of INSN, even
5274 if they appear to set or clobber a resource referenced in INSN. INSN is
5275 always a `jump_insn' or an `insn'. On machines where some `insn' or
5276 `jump_insn' is really a function call and its operands are registers whose
5277 use is actually in the subroutine it calls, you should define this macro.
5278 Doing so allows the delay slot scheduler to move instructions which copy
5279 arguments into the argument registers into the delay slot of INSN.
5281 You need not define this macro if it would always return zero. */
5282 /* #define INSN_REFERENCES_ARE_DELAYED(INSN) */
5284 /* In rare cases, correct code generation requires extra machine dependent
5285 processing between the second jump optimization pass and delayed branch
5286 scheduling. On those machines, define this macro as a C statement to act on
5287 the code starting at INSN. */
5288 /* #define MACHINE_DEPENDENT_REORG(INSN) */
5290 /* Define this macro if in some cases global symbols from one translation unit
5291 may not be bound to undefined symbols in another translation unit without
5292 user intervention. For instance, under Microsoft Windows symbols must be
5293 explicitly imported from shared libraries (DLLs). */
5294 /* #define MULTIPLE_SYMBOL_SPACES */
5296 /* A C expression for the maximum number of instructions to execute via
5297 conditional execution instructions instead of a branch. A value of
5298 BRANCH_COST+1 is the default if the machine does not use
5299 cc0, and 1 if it does use cc0. */
5300 /* #define MAX_CONDITIONAL_EXECUTE */
5302 /* A C statement that adds to tree CLOBBERS a set of STRING_CST trees for any
5303 hard regs the port wishes to automatically clobber for all asms. */
5304 /* #define MD_ASM_CLOBBERS(CLOBBERS) */
5306 /* Indicate how many instructions can be issued at the same time. */
5307 /* #define ISSUE_RATE */
5309 /* A C statement which is executed by the Haifa scheduler at the beginning of
5310 each block of instructions that are to be scheduled. FILE is either a null
5311 pointer, or a stdio stream to write any debug output to. VERBOSE is the
5312 verbose level provided by -fsched-verbose-<n>. */
5313 /* #define MD_SCHED_INIT (FILE, VERBOSE) */
5315 /* A C statement which is executed by the Haifa scheduler after it has scheduled
5316 the ready list to allow the machine description to reorder it (for example to
5317 combine two small instructions together on VLIW machines). FILE is either a
5318 null pointer, or a stdio stream to write any debug output to. VERBOSE is the
5319 verbose level provided by -fsched-verbose-=<n>. READY is a pointer to the
5320 ready list of instructions that are ready to be scheduled. N_READY is the
5321 number of elements in the ready list. The scheduler reads the ready list in
5322 reverse order, starting with READY[N_READY-1] and going to READY[0]. CLOCK
5323 is the timer tick of the scheduler. CAN_ISSUE_MORE is an output parameter that
5324 is set to the number of insns that can issue this clock; normally this is just
5326 /* #define MD_SCHED_REORDER (FILE, VERBOSE, READY, N_READY, CLOCK, CAN_ISSUE_MORE) */
5328 /* A C statement which is executed by the Haifa scheduler after it has scheduled
5329 an insn from the ready list. FILE is either a null pointer, or a stdio stream
5330 to write any debug output to. VERBOSE is the verbose level provided by
5331 -fsched-verbose-<n>. INSN is the instruction that was scheduled. MORE is the
5332 number of instructions that can be issued in the current cycle. This macro
5333 is responsible for updating the value of MORE (typically by (MORE)--). */
5334 /* #define MD_SCHED_VARIABLE_ISSUE (FILE, VERBOSE, INSN, MORE) */
5336 /* Define this to the largest integer machine mode which can be used for
5337 operations other than load, store and copy operations. You need only define
5338 this macro if the target holds values larger than word_mode in general purpose
5339 registers. Most targets should not define this macro. */
5340 /* #define MAX_INTEGER_COMPUTATION_MODE */
5342 /* Define this macro as a C string constant for the linker argument to link in the
5343 system math library, or "" if the target does not have a separate math library.
5344 You need only define this macro if the default of "-lm" is wrong. */
5345 /* #define MATH_LIBRARY */
5347 /* Define the information needed to generate branch and scc insns. This is
5348 stored from the compare operation. Note that we can't use "rtx" here
5349 since it hasn't been defined! */
5351 extern struct rtx_def *stormy16_compare_op0, *stormy16_compare_op1;
5353 /* End of stormy16.h */
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