1 /*{{{ Comment. */
2
3 /* Definitions of FR30 target.
4 Copyright (C) 1998-2023 Free Software Foundation, Inc.
5 Contributed by Cygnus Solutions.
6
7 This file is part of GCC.
8
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
12 any later version.
13
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
22
23 /*}}}*/
24 /*{{{ Run-time target specifications. */
25
26 #undef ASM_SPEC
27 #define ASM_SPEC ""
28
29 /* Define this to be a string constant containing `-D' options to define the
30 predefined macros that identify this machine and system. These macros will
31 be predefined unless the `-ansi' option is specified. */
32
33 #define TARGET_CPU_CPP_BUILTINS() \
34 do \
35 { \
36 builtin_define_std ("fr30"); \
37 builtin_assert ("machine=fr30"); \
38 } \
39 while (0)
40
41 #undef STARTFILE_SPEC
42 #define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s"
43
44 /* Include the OS stub library, so that the code can be simulated.
45 This is not the right way to do this. Ideally this kind of thing
46 should be done in the linker script - but I have not worked out how
47 to specify the location of a linker script in a gcc command line yet... */
48 #undef ENDFILE_SPEC
49 #define ENDFILE_SPEC "%{!mno-lsim:-lsim} crtend.o%s crtn.o%s"
50
51 #undef LIB_SPEC
52 #define LIB_SPEC "-lc"
53
54 #undef LINK_SPEC
55 #define LINK_SPEC "%{h*} %{v:-V} \
56 %{static:-Bstatic} %{shared:-shared} %{symbolic:-Bsymbolic}"
57
58 /*}}}*/
59 /*{{{ Storage Layout. */
60
61 #define BITS_BIG_ENDIAN 1
62
63 #define BYTES_BIG_ENDIAN 1
64
65 #define WORDS_BIG_ENDIAN 1
66
67 #define UNITS_PER_WORD 4
68
69 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
70 do \
71 { \
72 if (GET_MODE_CLASS (MODE) == MODE_INT \
73 && GET_MODE_SIZE (MODE) < 4) \
74 (MODE) = SImode; \
75 } \
76 while (0)
77
78 #define PARM_BOUNDARY 32
79
80 #define STACK_BOUNDARY 32
81
82 #define FUNCTION_BOUNDARY 32
83
84 #define BIGGEST_ALIGNMENT 32
85
86 #define DATA_ALIGNMENT(TYPE, ALIGN) \
87 (TREE_CODE (TYPE) == ARRAY_TYPE \
88 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
89 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
90
91 #define STRICT_ALIGNMENT 1
92
93 #define PCC_BITFIELD_TYPE_MATTERS 1
94
95 /*}}}*/
96 /*{{{ Layout of Source Language Data Types. */
97
98 #define SHORT_TYPE_SIZE 16
99 #define INT_TYPE_SIZE 32
100 #define LONG_TYPE_SIZE 32
101 #define LONG_LONG_TYPE_SIZE 64
102 #define FLOAT_TYPE_SIZE 32
103 #define DOUBLE_TYPE_SIZE 64
104 #define LONG_DOUBLE_TYPE_SIZE 64
105
106 #define DEFAULT_SIGNED_CHAR 1
107
108 #undef SIZE_TYPE
109 #define SIZE_TYPE "unsigned int"
110
111 #undef PTRDIFF_TYPE
112 #define PTRDIFF_TYPE "int"
113
114 #undef WCHAR_TYPE
115 #define WCHAR_TYPE "long int"
116
117 #undef WCHAR_TYPE_SIZE
118 #define WCHAR_TYPE_SIZE BITS_PER_WORD
119
120 /*}}}*/
121 /*{{{ REGISTER BASICS. */
122
123 /* Number of hardware registers known to the compiler. They receive numbers 0
124 through `FIRST_PSEUDO_REGISTER-1'; thus, the first pseudo register's number
125 really is assigned the number `FIRST_PSEUDO_REGISTER'. */
126 #define FIRST_PSEUDO_REGISTER 21
127
128 /* Fixed register assignments: */
129
130 /* Here we do a BAD THING - reserve a register for use by the machine
131 description file. There are too many places in compiler where it
132 assumes that it can issue a branch or jump instruction without
133 providing a scratch register for it, and reload just cannot cope, so
134 we keep a register back for these situations. */
135 #define COMPILER_SCRATCH_REGISTER 0
136
137 /* The register that contains the result of a function call. */
138 #define RETURN_VALUE_REGNUM 4
139
140 /* The first register that can contain the arguments to a function. */
141 #define FIRST_ARG_REGNUM 4
142
143 /* A call-used register that can be used during the function prologue. */
144 #define PROLOGUE_TMP_REGNUM COMPILER_SCRATCH_REGISTER
145
146 /* Register numbers used for passing a function's static chain pointer. If
147 register windows are used, the register number as seen by the called
148 function is `STATIC_CHAIN_INCOMING_REGNUM', while the register number as
149 seen by the calling function is `STATIC_CHAIN_REGNUM'. If these registers
150 are the same, `STATIC_CHAIN_INCOMING_REGNUM' need not be defined.
151
152 The static chain register need not be a fixed register.
153
154 If the static chain is passed in memory, these macros should not be defined;
155 instead, the next two macros should be defined. */
156 #define STATIC_CHAIN_REGNUM 12
157 /* #define STATIC_CHAIN_INCOMING_REGNUM */
158
159 /* An FR30 specific hardware register. */
160 #define ACCUMULATOR_REGNUM 13
161
162 /* The register number of the frame pointer register, which is used to access
163 automatic variables in the stack frame. On some machines, the hardware
164 determines which register this is. On other machines, you can choose any
165 register you wish for this purpose. */
166 #define FRAME_POINTER_REGNUM 14
167
168 /* The register number of the stack pointer register, which must also be a
169 fixed register according to `FIXED_REGISTERS'. On most machines, the
170 hardware determines which register this is. */
171 #define STACK_POINTER_REGNUM 15
172
173 /* The following a fake hard registers that describe some of the dedicated
174 registers on the FR30. */
175 #define CONDITION_CODE_REGNUM 16
176 #define RETURN_POINTER_REGNUM 17
177 #define MD_HIGH_REGNUM 18
178 #define MD_LOW_REGNUM 19
179
180 /* An initializer that says which registers are used for fixed purposes all
181 throughout the compiled code and are therefore not available for general
182 allocation. These would include the stack pointer, the frame pointer
183 (except on machines where that can be used as a general register when no
184 frame pointer is needed), the program counter on machines where that is
185 considered one of the addressable registers, and any other numbered register
186 with a standard use.
187
188 This information is expressed as a sequence of numbers, separated by commas
189 and surrounded by braces. The Nth number is 1 if register N is fixed, 0
190 otherwise.
191
192 The table initialized from this macro, and the table initialized by the
193 following one, may be overridden at run time either automatically, by the
194 actions of the macro `TARGET_CONDITIONAL_REGISTER_USAGE', or by the user
195 with the command options `-ffixed-REG', `-fcall-used-REG' and
196 `-fcall-saved-REG'. */
197 #define FIXED_REGISTERS \
198 { 1, 0, 0, 0, 0, 0, 0, 0, /* 0 - 7 */ \
199 0, 0, 0, 0, 0, 0, 0, 1, /* 8 - 15 */ \
200 1, 1, 1, 1, 1 } /* 16 - 20 */
201
202 /* XXX - MDL and MDH set as fixed for now - this is until I can get the
203 mul patterns working. */
204
205 /* Like `FIXED_REGISTERS' but has 1 for each register that is clobbered (in
206 general) by function calls as well as for fixed registers. This macro
207 therefore identifies the registers that are not available for general
208 allocation of values that must live across function calls.
209
210 If a register has 0 in `CALL_USED_REGISTERS', the compiler automatically
211 saves it on function entry and restores it on function exit, if the register
212 is used within the function. */
213 #define CALL_USED_REGISTERS \
214 { 1, 1, 1, 1, 1, 1, 1, 1, /* 0 - 7 */ \
215 0, 0, 0, 0, 1, 1, 0, 1, /* 8 - 15 */ \
216 1, 1, 1, 1, 1 } /* 16 - 20 */
217
218 /* A C initializer containing the assembler's names for the machine registers,
219 each one as a C string constant. This is what translates register numbers
220 in the compiler into assembler language. */
221 #define REGISTER_NAMES \
222 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
223 "r8", "r9", "r10", "r11", "r12", "ac", "fp", "sp", \
224 "cc", "rp", "mdh", "mdl", "ap" \
225 }
226
227 /* If defined, a C initializer for an array of structures containing a name and
228 a register number. This macro defines additional names for hard registers,
229 thus allowing the `asm' option in declarations to refer to registers using
230 alternate names. */
231 #define ADDITIONAL_REGISTER_NAMES \
232 { \
233 {"r13", 13}, {"r14", 14}, {"r15", 15}, {"usp", 15}, {"ps", 16}\
234 }
235
236 /*}}}*/
237 /*{{{ Register Classes. */
238
239 /* An enumeral type that must be defined with all the register class names as
240 enumeral values. `NO_REGS' must be first. `ALL_REGS' must be the last
241 register class, followed by one more enumeral value, `LIM_REG_CLASSES',
242 which is not a register class but rather tells how many classes there are.
243
244 Each register class has a number, which is the value of casting the class
245 name to type `int'. The number serves as an index in many of the tables
246 described below. */
247 enum reg_class
248 {
249 NO_REGS,
250 MULTIPLY_32_REG, /* the MDL register as used by the MULH, MULUH insns */
251 MULTIPLY_64_REG, /* the MDH,MDL register pair as used by MUL and MULU */
252 LOW_REGS, /* registers 0 through 7 */
253 HIGH_REGS, /* registers 8 through 15 */
254 REAL_REGS, /* i.e. all the general hardware registers on the FR30 */
255 ALL_REGS,
256 LIM_REG_CLASSES
257 };
258
259 #define GENERAL_REGS REAL_REGS
260 #define N_REG_CLASSES ((int) LIM_REG_CLASSES)
261
262 /* An initializer containing the names of the register classes as C string
263 constants. These names are used in writing some of the debugging dumps. */
264 #define REG_CLASS_NAMES \
265 { \
266 "NO_REGS", \
267 "MULTIPLY_32_REG", \
268 "MULTIPLY_64_REG", \
269 "LOW_REGS", \
270 "HIGH_REGS", \
271 "REAL_REGS", \
272 "ALL_REGS" \
273 }
274
275 /* An initializer containing the contents of the register classes, as integers
276 which are bit masks. The Nth integer specifies the contents of class N.
277 The way the integer MASK is interpreted is that register R is in the class
278 if `MASK & (1 << R)' is 1.
279
280 When the machine has more than 32 registers, an integer does not suffice.
281 Then the integers are replaced by sub-initializers, braced groupings
282 containing several integers. Each sub-initializer must be suitable as an
283 initializer for the type `HARD_REG_SET' which is defined in
284 `hard-reg-set.h'. */
285 #define REG_CLASS_CONTENTS \
286 { \
287 { 0 }, \
288 { 1 << MD_LOW_REGNUM }, \
289 { (1 << MD_LOW_REGNUM) | (1 << MD_HIGH_REGNUM) }, \
290 { (1 << 8) - 1 }, \
291 { ((1 << 8) - 1) << 8 }, \
292 { (1 << CONDITION_CODE_REGNUM) - 1 }, \
293 { (1 << FIRST_PSEUDO_REGISTER) - 1 } \
294 }
295
296 /* A C expression whose value is a register class containing hard register
297 REGNO. In general there is more than one such class; choose a class which
298 is "minimal", meaning that no smaller class also contains the register. */
299 #define REGNO_REG_CLASS(REGNO) \
300 ( (REGNO) < 8 ? LOW_REGS \
301 : (REGNO) < CONDITION_CODE_REGNUM ? HIGH_REGS \
302 : (REGNO) == MD_LOW_REGNUM ? MULTIPLY_32_REG \
303 : (REGNO) == MD_HIGH_REGNUM ? MULTIPLY_64_REG \
304 : ALL_REGS)
305
306 /* A macro whose definition is the name of the class to which a valid base
307 register must belong. A base register is one used in an address which is
308 the register value plus a displacement. */
309 #define BASE_REG_CLASS REAL_REGS
310
311 /* A macro whose definition is the name of the class to which a valid index
312 register must belong. An index register is one used in an address where its
313 value is either multiplied by a scale factor or added to another register
314 (as well as added to a displacement). */
315 #define INDEX_REG_CLASS REAL_REGS
316
317 /* A C expression which is nonzero if register number NUM is suitable for use
318 as a base register in operand addresses. It may be either a suitable hard
319 register or a pseudo register that has been allocated such a hard register. */
320 #define REGNO_OK_FOR_BASE_P(NUM) 1
321
322 /* A C expression which is nonzero if register number NUM is suitable for use
323 as an index register in operand addresses. It may be either a suitable hard
324 register or a pseudo register that has been allocated such a hard register.
325
326 The difference between an index register and a base register is that the
327 index register may be scaled. If an address involves the sum of two
328 registers, neither one of them scaled, then either one may be labeled the
329 "base" and the other the "index"; but whichever labeling is used must fit
330 the machine's constraints of which registers may serve in each capacity.
331 The compiler will try both labelings, looking for one that is valid, and
332 will reload one or both registers only if neither labeling works. */
333 #define REGNO_OK_FOR_INDEX_P(NUM) 1
334
335 #define CLASS_MAX_NREGS(CLASS, MODE) targetm.hard_regno_nregs (0, MODE)
336
337 /*}}}*/
338 /*{{{ Basic Stack Layout. */
339
340 /* Define this macro if pushing a word onto the stack moves the stack pointer
341 to a smaller address. */
342 #define STACK_GROWS_DOWNWARD 1
343
344 /* Define this to macro nonzero if the addresses of local variable slots
345 are at negative offsets from the frame pointer. */
346 #define FRAME_GROWS_DOWNWARD 1
347
348 /* Offset from the stack pointer register to the first location at which
349 outgoing arguments are placed. If not specified, the default value of zero
350 is used. This is the proper value for most machines.
351
352 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
353 location at which outgoing arguments are placed. */
354 #define STACK_POINTER_OFFSET 0
355
356 /* Offset from the argument pointer register to the first argument's address.
357 On some machines it may depend on the data type of the function.
358
359 If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first
360 argument's address. */
361 #define FIRST_PARM_OFFSET(FUNDECL) 0
362
363 /* A C expression whose value is RTL representing the location of the incoming
364 return address at the beginning of any function, before the prologue. This
365 RTL is either a `REG', indicating that the return value is saved in `REG',
366 or a `MEM' representing a location in the stack.
367
368 You only need to define this macro if you want to support call frame
369 debugging information like that provided by DWARF 2. */
370 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (SImode, RETURN_POINTER_REGNUM)
371
372 /*}}}*/
373 /*{{{ Register That Address the Stack Frame. */
374
375 /* The register number of the arg pointer register, which is used to access the
376 function's argument list. On some machines, this is the same as the frame
377 pointer register. On some machines, the hardware determines which register
378 this is. On other machines, you can choose any register you wish for this
379 purpose. If this is not the same register as the frame pointer register,
380 then you must mark it as a fixed register according to `FIXED_REGISTERS', or
381 arrange to be able to eliminate it. */
382 #define ARG_POINTER_REGNUM 20
383
384 /*}}}*/
385 /*{{{ Eliminating the Frame Pointer and the Arg Pointer. */
386
387 /* If defined, this macro specifies a table of register pairs used to eliminate
388 unneeded registers that point into the stack frame. If it is not defined,
389 the only elimination attempted by the compiler is to replace references to
390 the frame pointer with references to the stack pointer.
391
392 The definition of this macro is a list of structure initializations, each of
393 which specifies an original and replacement register.
394
395 On some machines, the position of the argument pointer is not known until
396 the compilation is completed. In such a case, a separate hard register must
397 be used for the argument pointer. This register can be eliminated by
398 replacing it with either the frame pointer or the argument pointer,
399 depending on whether or not the frame pointer has been eliminated.
400
401 In this case, you might specify:
402 #define ELIMINABLE_REGS \
403 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
404 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
405 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
406
407 Note that the elimination of the argument pointer with the stack pointer is
408 specified first since that is the preferred elimination. */
409
410 #define ELIMINABLE_REGS \
411 { \
412 {ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
413 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
414 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM} \
415 }
416
417 /* This macro returns the initial difference between the specified pair
418 of registers. */
419 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
420 (OFFSET) = fr30_compute_frame_size (FROM, TO)
421
422 /*}}}*/
423 /*{{{ Passing Function Arguments on the Stack. */
424
425 /* If defined, the maximum amount of space required for outgoing arguments will
426 be computed and placed into the variable
427 `crtl->outgoing_args_size'. No space will be pushed onto the
428 stack for each call; instead, the function prologue should increase the
429 stack frame size by this amount.
430
431 Defining both `PUSH_ROUNDING' and `ACCUMULATE_OUTGOING_ARGS' is not
432 proper. */
433 #define ACCUMULATE_OUTGOING_ARGS 1
434
435 /*}}}*/
436 /*{{{ Function Arguments in Registers. */
437
438 /* The number of register assigned to holding function arguments. */
439
440 #define FR30_NUM_ARG_REGS 4
441
442 /* A C type for declaring a variable that is used as the first argument of
443 `FUNCTION_ARG' and other related values. For some target machines, the type
444 `int' suffices and can hold the number of bytes of argument so far.
445
446 There is no need to record in `CUMULATIVE_ARGS' anything about the arguments
447 that have been passed on the stack. The compiler has other variables to
448 keep track of that. For target machines on which all arguments are passed
449 on the stack, there is no need to store anything in `CUMULATIVE_ARGS';
450 however, the data structure must exist and should not be empty, so use
451 `int'. */
452 /* On the FR30 this value is an accumulating count of the number of argument
453 registers that have been filled with argument values, as opposed to say,
454 the number of bytes of argument accumulated so far. */
455 #define CUMULATIVE_ARGS int
456
457 /* A C statement (sans semicolon) for initializing the variable CUM for the
458 state at the beginning of the argument list. The variable has type
459 `CUMULATIVE_ARGS'. The value of FNTYPE is the tree node for the data type
460 of the function which will receive the args, or 0 if the args are to a
461 compiler support library function. The value of INDIRECT is nonzero when
462 processing an indirect call, for example a call through a function pointer.
463 The value of INDIRECT is zero for a call to an explicitly named function, a
464 library function call, or when `INIT_CUMULATIVE_ARGS' is used to find
465 arguments for the function being compiled.
466
467 When processing a call to a compiler support library function, LIBNAME
468 identifies which one. It is a `symbol_ref' rtx which contains the name of
469 the function, as a string. LIBNAME is 0 when an ordinary C function call is
470 being processed. Thus, each time this macro is called, either LIBNAME or
471 FNTYPE is nonzero, but never both of them at once. */
472 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
473 (CUM) = 0
474
475 /* A C expression that is nonzero if REGNO is the number of a hard register in
476 which function arguments are sometimes passed. This does *not* include
477 implicit arguments such as the static chain and the structure-value address.
478 On many machines, no registers can be used for this purpose since all
479 function arguments are pushed on the stack. */
480 #define FUNCTION_ARG_REGNO_P(REGNO) \
481 ((REGNO) >= FIRST_ARG_REGNUM && ((REGNO) < FIRST_ARG_REGNUM + FR30_NUM_ARG_REGS))
482
483 /*}}}*/
484 /*{{{ How Large Values are Returned. */
485
486 /* Define this macro to be 1 if all structure and union return values must be
487 in memory. Since this results in slower code, this should be defined only
488 if needed for compatibility with other compilers or with an ABI. If you
489 define this macro to be 0, then the conventions used for structure and union
490 return values are decided by the `TARGET_RETURN_IN_MEMORY' macro.
491
492 If not defined, this defaults to the value 1. */
493 #define DEFAULT_PCC_STRUCT_RETURN 1
494
495 /*}}}*/
496 /*{{{ Generating Code for Profiling. */
497
498 /* A C statement or compound statement to output to FILE some assembler code to
499 call the profiling subroutine `mcount'. Before calling, the assembler code
500 must load the address of a counter variable into a register where `mcount'
501 expects to find the address. The name of this variable is `LP' followed by
502 the number LABELNO, so you would generate the name using `LP%d' in a
503 `fprintf'.
504
505 The details of how the address should be passed to `mcount' are determined
506 by your operating system environment, not by GCC. To figure them out,
507 compile a small program for profiling using the system's installed C
508 compiler and look at the assembler code that results. */
509 #define FUNCTION_PROFILER(FILE, LABELNO) \
510 { \
511 fprintf (FILE, "\t mov rp, r1\n" ); \
512 fprintf (FILE, "\t ldi:32 mcount, r0\n" ); \
513 fprintf (FILE, "\t call @r0\n" ); \
514 fprintf (FILE, ".word\tLP%d\n", LABELNO); \
515 }
516
517 /*}}}*/
518 /*{{{ Trampolines for Nested Functions. */
519
520 /* A C expression for the size in bytes of the trampoline, as an integer. */
521 #define TRAMPOLINE_SIZE 18
522
523 /* We want the trampoline to be aligned on a 32bit boundary so that we can
524 make sure the location of the static chain & target function within
525 the trampoline is also aligned on a 32bit boundary. */
526 #define TRAMPOLINE_ALIGNMENT 32
527
528 /*}}}*/
529 /*{{{ Addressing Modes. */
530
531 /* A number, the maximum number of registers that can appear in a valid memory
532 address. Note that it is up to you to specify a value equal to the maximum
533 number that `GO_IF_LEGITIMATE_ADDRESS' would ever accept. */
534 #define MAX_REGS_PER_ADDRESS 1
535
536 /* A C compound statement with a conditional `goto LABEL;' executed if X (an
537 RTX) is a legitimate memory address on the target machine for a memory
538 operand of mode MODE. */
539
540 /* On the FR30 we only have one real addressing mode - an address in a
541 register. There are three special cases however:
542
543 * indexed addressing using small positive offsets from the stack pointer
544
545 * indexed addressing using small signed offsets from the frame pointer
546
547 * register plus register addressing using R13 as the base register.
548
549 At the moment we only support the first two of these special cases. */
550
551 #ifdef REG_OK_STRICT
552 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
553 do \
554 { \
555 if (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X)) \
556 goto LABEL; \
557 if (GET_CODE (X) == PLUS \
558 && ((MODE) == SImode || (MODE) == SFmode) \
559 && GET_CODE (XEXP (X, 0)) == REG \
560 && REGNO (XEXP (X, 0)) == STACK_POINTER_REGNUM \
561 && GET_CODE (XEXP (X, 1)) == CONST_INT \
562 && IN_RANGE (INTVAL (XEXP (X, 1)), 0, (1 << 6) - 4)) \
563 goto LABEL; \
564 if (GET_CODE (X) == PLUS \
565 && ((MODE) == SImode || (MODE) == SFmode) \
566 && GET_CODE (XEXP (X, 0)) == REG \
567 && REGNO (XEXP (X, 0)) == FRAME_POINTER_REGNUM \
568 && GET_CODE (XEXP (X, 1)) == CONST_INT \
569 && IN_RANGE (INTVAL (XEXP (X, 1)), -(1 << 9), (1 << 9) - 4)) \
570 goto LABEL; \
571 } \
572 while (0)
573 #else
574 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
575 do \
576 { \
577 if (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X)) \
578 goto LABEL; \
579 if (GET_CODE (X) == PLUS \
580 && ((MODE) == SImode || (MODE) == SFmode) \
581 && GET_CODE (XEXP (X, 0)) == REG \
582 && REGNO (XEXP (X, 0)) == STACK_POINTER_REGNUM \
583 && GET_CODE (XEXP (X, 1)) == CONST_INT \
584 && IN_RANGE (INTVAL (XEXP (X, 1)), 0, (1 << 6) - 4)) \
585 goto LABEL; \
586 if (GET_CODE (X) == PLUS \
587 && ((MODE) == SImode || (MODE) == SFmode) \
588 && GET_CODE (XEXP (X, 0)) == REG \
589 && (REGNO (XEXP (X, 0)) == FRAME_POINTER_REGNUM \
590 || REGNO (XEXP (X, 0)) == ARG_POINTER_REGNUM) \
591 && GET_CODE (XEXP (X, 1)) == CONST_INT \
592 && IN_RANGE (INTVAL (XEXP (X, 1)), -(1 << 9), (1 << 9) - 4)) \
593 goto LABEL; \
594 } \
595 while (0)
596 #endif
597
598 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
599 use as a base register. For hard registers, it should always accept those
600 which the hardware permits and reject the others. Whether the macro accepts
601 or rejects pseudo registers must be controlled by `REG_OK_STRICT' as
602 described above. This usually requires two variant definitions, of which
603 `REG_OK_STRICT' controls the one actually used. */
604 #ifdef REG_OK_STRICT
605 #define REG_OK_FOR_BASE_P(X) (((unsigned) REGNO (X)) <= STACK_POINTER_REGNUM)
606 #else
607 #define REG_OK_FOR_BASE_P(X) 1
608 #endif
609
610 /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for
611 use as an index register.
612
613 The difference between an index register and a base register is that the
614 index register may be scaled. If an address involves the sum of two
615 registers, neither one of them scaled, then either one may be labeled the
616 "base" and the other the "index"; but whichever labeling is used must fit
617 the machine's constraints of which registers may serve in each capacity.
618 The compiler will try both labelings, looking for one that is valid, and
619 will reload one or both registers only if neither labeling works. */
620 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
621
622 /*}}}*/
623 /*{{{ Describing Relative Costs of Operations */
624
625 /* Define this macro as a C expression which is nonzero if accessing less than
626 a word of memory (i.e. a `char' or a `short') is no faster than accessing a
627 word of memory, i.e., if such access require more than one instruction or if
628 there is no difference in cost between byte and (aligned) word loads.
629
630 When this macro is not defined, the compiler will access a field by finding
631 the smallest containing object; when it is defined, a fullword load will be
632 used if alignment permits. Unless bytes accesses are faster than word
633 accesses, using word accesses is preferable since it may eliminate
634 subsequent memory access if subsequent accesses occur to other fields in the
635 same word of the structure, but to different bytes. */
636 #define SLOW_BYTE_ACCESS 1
637
638 /*}}}*/
639 /*{{{ Dividing the output into sections. */
640
641 /* A C expression whose value is a string containing the assembler operation
642 that should precede instructions and read-only data. Normally `".text"' is
643 right. */
644 #define TEXT_SECTION_ASM_OP "\t.text"
645
646 /* A C expression whose value is a string containing the assembler operation to
647 identify the following data as writable initialized data. Normally
648 `".data"' is right. */
649 #define DATA_SECTION_ASM_OP "\t.data"
650
651 #define BSS_SECTION_ASM_OP "\t.section .bss"
652
653 /*}}}*/
654 /*{{{ The Overall Framework of an Assembler File. */
655
656 /* A C string constant describing how to begin a comment in the target
657 assembler language. The compiler assumes that the comment will end at the
658 end of the line. */
659 #define ASM_COMMENT_START ";"
660
661 /* A C string constant for text to be output before each `asm' statement or
662 group of consecutive ones. Normally this is `"#APP"', which is a comment
663 that has no effect on most assemblers but tells the GNU assembler that it
664 must check the lines that follow for all valid assembler constructs. */
665 #define ASM_APP_ON "#APP\n"
666
667 /* A C string constant for text to be output after each `asm' statement or
668 group of consecutive ones. Normally this is `"#NO_APP"', which tells the
669 GNU assembler to resume making the time-saving assumptions that are valid
670 for ordinary compiler output. */
671 #define ASM_APP_OFF "#NO_APP\n"
672
673 /*}}}*/
674 /*{{{ Output and Generation of Labels. */
675
676 /* Globalizing directive for a label. */
677 #define GLOBAL_ASM_OP "\t.globl "
678
679 /*}}}*/
680 /*{{{ Output of Assembler Instructions. */
681
682 /* A C compound statement to output to stdio stream STREAM the assembler syntax
683 for an instruction operand X. X is an RTL expression.
684
685 CODE is a value that can be used to specify one of several ways of printing
686 the operand. It is used when identical operands must be printed differently
687 depending on the context. CODE comes from the `%' specification that was
688 used to request printing of the operand. If the specification was just
689 `%DIGIT' then CODE is 0; if the specification was `%LTR DIGIT' then CODE is
690 the ASCII code for LTR.
691
692 If X is a register, this macro should print the register's name. The names
693 can be found in an array `reg_names' whose type is `char *[]'. `reg_names'
694 is initialized from `REGISTER_NAMES'.
695
696 When the machine description has a specification `%PUNCT' (a `%' followed by
697 a punctuation character), this macro is called with a null pointer for X and
698 the punctuation character for CODE. */
699 #define PRINT_OPERAND(STREAM, X, CODE) fr30_print_operand (STREAM, X, CODE)
700
701 /* A C expression which evaluates to true if CODE is a valid punctuation
702 character for use in the `PRINT_OPERAND' macro. If
703 `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no punctuation
704 characters (except for the standard one, `%') are used in this way. */
705 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) (CODE == '#')
706
707 /* A C compound statement to output to stdio stream STREAM the assembler syntax
708 for an instruction operand that is a memory reference whose address is X. X
709 is an RTL expression. */
710
711 #define PRINT_OPERAND_ADDRESS(STREAM, X) fr30_print_operand_address (STREAM, X)
712
713 #define REGISTER_PREFIX "%"
714 #define LOCAL_LABEL_PREFIX "."
715 #define USER_LABEL_PREFIX ""
716 #define IMMEDIATE_PREFIX ""
717
718 /*}}}*/
719 /*{{{ Output of Dispatch Tables. */
720
721 /* This macro should be provided on machines where the addresses in a dispatch
722 table are relative to the table's own address.
723
724 The definition should be a C statement to output to the stdio stream STREAM
725 an assembler pseudo-instruction to generate a difference between two labels.
726 VALUE and REL are the numbers of two internal labels. The definitions of
727 these labels are output using `(*targetm.asm_out.internal_label)', and they must be
728 printed in the same way here. For example,
729
730 fprintf (STREAM, "\t.word L%d-L%d\n", VALUE, REL) */
731 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
732 fprintf (STREAM, "\t.word .L%d-.L%d\n", VALUE, REL)
733
734 /* This macro should be provided on machines where the addresses in a dispatch
735 table are absolute.
736
737 The definition should be a C statement to output to the stdio stream STREAM
738 an assembler pseudo-instruction to generate a reference to a label. VALUE
739 is the number of an internal label whose definition is output using
740 `(*targetm.asm_out.internal_label)'. For example,
741
742 fprintf (STREAM, "\t.word L%d\n", VALUE) */
743 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
744 fprintf (STREAM, "\t.word .L%d\n", VALUE)
745
746 /*}}}*/
747 /*{{{ Assembler Commands for Alignment. */
748
749 /* A C statement to output to the stdio stream STREAM an assembler command to
750 advance the location counter to a multiple of 2 to the POWER bytes. POWER
751 will be a C expression of type `int'. */
752 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
753 fprintf ((STREAM), "\t.p2align %d\n", (POWER))
754
755 /*}}}*/
756 /*{{{ Miscellaneous Parameters. */
757
758 /* An alias for a machine mode name. This is the machine mode that elements of
759 a jump-table should have. */
760 #define CASE_VECTOR_MODE SImode
761
762 /* The maximum number of bytes that a single instruction can move quickly from
763 memory to memory. */
764 #define MOVE_MAX 8
765
766 /* An alias for the machine mode for pointers. On most machines, define this
767 to be the integer mode corresponding to the width of a hardware pointer;
768 `SImode' on 32-bit machine or `DImode' on 64-bit machines. On some machines
769 you must define this to be one of the partial integer modes, such as
770 `PSImode'.
771
772 The width of `Pmode' must be at least as large as the value of
773 `POINTER_SIZE'. If it is not equal, you must define the macro
774 `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to `Pmode'. */
775 #define Pmode SImode
776
777 /* An alias for the machine mode used for memory references to functions being
778 called, in `call' RTL expressions. On most machines this should be
779 `QImode'. */
780 #define FUNCTION_MODE QImode
781
782 /*}}}*/
783
784 /* Local Variables: */
785 /* folded-file: t */
786 /* End: */