1 /* Definitions of target machine for GNU compiler, for IBM RS/6000.
2 Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
3 Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
22 /* Note that some other tm.h files include this one and then override
23 many of the definitions that relate to assembler syntax. */
26 /* Names to predefine in the preprocessor for this target machine. */
28 #define CPP_PREDEFINES "-D_IBMR2 -D_AIX -D_AIX32 -Asystem(unix) -Asystem(aix) -Acpu(rs6000) -Amachine(rs6000)"
30 /* Print subsidiary information on the compiler version in use. */
31 #define TARGET_VERSION ;
33 /* Tell the assembler to assume that all undefined names are external.
35 Don't do this until the fixed IBM assembler is more generally available.
36 When this becomes permanently defined, the ASM_OUTPUT_EXTERNAL,
37 ASM_OUTPUT_EXTERNAL_LIBCALL, and RS6000_OUTPUT_BASENAME macros will no
38 longer be needed. Also, the extern declaration of mcount in ASM_FILE_START
39 will no longer be needed. */
41 /* #define ASM_SPEC "-u" */
43 /* Define the options for the binder: Start text at 512, align all segments
44 to 512 bytes, and warn if there is text relocation.
46 The -bhalt:4 option supposedly changes the level at which ld will abort,
47 but it also suppresses warnings about multiply defined symbols and is
48 used by the AIX cc command. So we use it here.
50 -bnodelcsect undoes a poor choice of default relating to multiply-defined
51 csects. See AIX documentation for more information about this. */
53 #define LINK_SPEC "-T512 -H512 %{!r:-btextro} -bhalt:4 -bnodelcsect\
54 %{static:-bnso -bI:/lib/syscalls.exp} %{g*:-bexport:/usr/lib/libg.exp}"
56 /* Profiled library versions are used by linking with special directories. */
57 #define LIB_SPEC "%{pg:-L/lib/profiled -L/usr/lib/profiled}\
58 %{p:-L/lib/profiled -L/usr/lib/profiled} %{g*:-lg} -lc"
60 /* gcc must do the search itself to find libgcc.a, not use -l. */
61 #define LINK_LIBGCC_SPECIAL_1
63 /* Don't turn -B into -L if the argument specifies a relative file name. */
64 #define RELATIVE_PREFIX_NOT_LINKDIR
66 /* Architecture type. */
68 extern int target_flags;
70 /* Use POWER architecture instructions and MQ register. */
71 #define MASK_POWER 0x01
73 /* Use POWER2 extensions to POWER architecture. */
74 #define MASK_POWER2 0x02
76 /* Use PowerPC architecture instructions. */
77 #define MASK_POWERPC 0x04
79 /* Use PowerPC extended FP instruction including sqrt and fsel. */
80 #define MASK_PPCFPX 0x08
82 /* Use PowerPC-64 architecture instructions. */
83 #define MASK_POWERPC64 0x10
85 /* Use revised mnemonic names defined for PowerPC architecture. */
86 #define MASK_NEW_MNEMONICS 0x20
88 /* Disable placing fp constants in the TOC; can be turned on when the
90 #define MASK_NO_FP_IN_TOC 0x40
92 /* Output only one TOC entry per module. Normally linking fails if
93 there are more than 16K unique variables/constants in an executable. With
94 this option, linking fails only if there are more than 16K modules, or
95 if there are more than 16K unique variables/constant in a single module.
97 This is at the cost of having 2 extra loads and one extra store per
98 function, and one less allocatable register. */
99 #define MASK_MINIMAL_TOC 0x80
101 #define TARGET_POWER (target_flags & MASK_POWER)
102 #define TARGET_POWER2 (target_flags & MASK_POWER2)
103 #define TARGET_POWERPC (target_flags & MASK_POWERPC)
104 #define TARGET_PPCFPX (target_flags & MASK_PPCFPX)
105 #define TARGET_POWERPC64 (target_flags & MASK_POWERPC64)
106 #define TARGET_NEW_MNEMONICS (target_flags & MASK_NEW_MNEMONICS)
107 #define TARGET_NO_FP_IN_TOC (target_flags & MASK_NO_FP_IN_TOC)
108 #define TARGET_MINIMAL_TOC (target_flags & MASK_MINIMAL_TOC)
110 /* Run-time compilation parameters selecting different hardware subsets.
112 Macro to define tables used to set the flags.
113 This is a list in braces of pairs in braces,
114 each pair being { "NAME", VALUE }
115 where VALUE is the bits to set or minus the bits to clear.
116 An empty string NAME is used to identify the default VALUE. */
118 #define TARGET_SWITCHES \
119 {{"power", MASK_POWER}, \
120 {"power2", MASK_POWER | MASK_POWER2}, \
121 {"no-power2", - MASK_POWER2}, \
122 {"no-power", - (MASK_POWER | MASK_POWER2)}, \
123 {"powerpc", MASK_POWERPC}, \
124 {"no-powerpc", - (MASK_POWERPC | MASK_PPCFPX | MASK_POWERPC64)}, \
125 {"powerpc-fpx", MASK_POWERPC | MASK_PPCFPX}, \
126 {"no-powerpc-fpx", - MASK_PPCFPX}, \
127 {"powerpc64", MASK_POWERPC | MASK_PPCFPX | MASK_POWERPC64}, \
128 {"no-powerpc64", -MASK_POWERPC64}, \
129 {"new-mnemonics", MASK_NEW_MNEMONICS}, \
130 {"old-mnemonics", -MASK_NEW_MNEMONICS}, \
131 {"normal-toc", - (MASK_NO_FP_IN_TOC | MASK_MINIMAL_TOC)}, \
132 {"fp-in-toc", - MASK_NO_FP_IN_TOC}, \
133 {"no-fp-in-toc", MASK_NO_FP_IN_TOC}, \
134 {"minimal-toc", MASK_MINIMAL_TOC}, \
135 {"no-minimal-toc", - MASK_MINIMAL_TOC}, \
136 {"", TARGET_DEFAULT}}
138 #define TARGET_DEFAULT MASK_POWER
140 /* Processor type. */
149 extern enum processor_type rs6000_cpu;
151 /* Recast the processor type to the cpu attribute. */
152 #define rs6000_cpu_attr ((enum attr_cpu)rs6000_cpu)
154 /* Define the default processor. This is overridden by other tm.h files. */
155 #define PROCESSOR_DEFAULT PROCESSOR_RIOS1
157 /* Specify the dialect of assembler to use. New mnemonics is dialect one
158 and the old mnemonics are dialect zero. */
159 #define ASSEMBLER_DIALECT TARGET_NEW_MNEMONICS ? 1 : 0
161 /* This macro is similar to `TARGET_SWITCHES' but defines names of
162 command options that have values. Its definition is an
163 initializer with a subgrouping for each command option.
165 Each subgrouping contains a string constant, that defines the
166 fixed part of the option name, and the address of a variable.
167 The variable, type `char *', is set to the variable part of the
168 given option if the fixed part matches. The actual option name
169 is made by appending `-m' to the specified name.
171 Here is an example which defines `-mshort-data-NUMBER'. If the
172 given option is `-mshort-data-512', the variable `m88k_short_data'
173 will be set to the string `"512"'.
175 extern char *m88k_short_data;
176 #define TARGET_OPTIONS { { "short-data-", &m88k_short_data } } */
178 #define TARGET_OPTIONS \
179 { {"cpu=", &rs6000_cpu_string}}
181 extern char *rs6000_cpu_string;
183 /* Sometimes certain combinations of command options do not make sense
184 on a particular target machine. You can define a macro
185 `OVERRIDE_OPTIONS' to take account of this. This macro, if
186 defined, is executed once just after all the command options have
189 On the RS/6000 this is used to define the target cpu type. */
191 #define OVERRIDE_OPTIONS rs6000_override_options ()
193 /* Show we can debug even without a frame pointer. */
194 #define CAN_DEBUG_WITHOUT_FP
196 /* target machine storage layout */
198 /* Define this macro if it is advisable to hold scalars in registers
199 in a wider mode than that declared by the program. In such cases,
200 the value is constrained to be within the bounds of the declared
201 type, but kept valid in the wider mode. The signedness of the
202 extension may differ from that of the type. */
204 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
205 if (GET_MODE_CLASS (MODE) == MODE_INT \
206 && GET_MODE_SIZE (MODE) < 4) \
209 /* Define this if most significant bit is lowest numbered
210 in instructions that operate on numbered bit-fields. */
211 /* That is true on RS/6000. */
212 #define BITS_BIG_ENDIAN 1
214 /* Define this if most significant byte of a word is the lowest numbered. */
215 /* That is true on RS/6000. */
216 #define BYTES_BIG_ENDIAN 1
218 /* Define this if most significant word of a multiword number is lowest
221 For RS/6000 we can decide arbitrarily since there are no machine
222 instructions for them. Might as well be consistent with bits and bytes. */
223 #define WORDS_BIG_ENDIAN 1
225 /* number of bits in an addressable storage unit */
226 #define BITS_PER_UNIT 8
228 /* Width in bits of a "word", which is the contents of a machine register.
229 Note that this is not necessarily the width of data type `int';
230 if using 16-bit ints on a 68000, this would still be 32.
231 But on a machine with 16-bit registers, this would be 16. */
232 #define BITS_PER_WORD 32
234 /* Width of a word, in units (bytes). */
235 #define UNITS_PER_WORD 4
237 /* Type used for ptrdiff_t, as a string used in a declaration. */
238 #define PTRDIFF_TYPE "int"
240 /* Type used for wchar_t, as a string used in a declaration. */
241 #define WCHAR_TYPE "short unsigned int"
243 /* Width of wchar_t in bits. */
244 #define WCHAR_TYPE_SIZE 16
246 /* Width in bits of a pointer.
247 See also the macro `Pmode' defined below. */
248 #define POINTER_SIZE 32
250 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
251 #define PARM_BOUNDARY 32
253 /* Boundary (in *bits*) on which stack pointer should be aligned. */
254 #define STACK_BOUNDARY 64
256 /* Allocation boundary (in *bits*) for the code of a function. */
257 #define FUNCTION_BOUNDARY 32
259 /* No data type wants to be aligned rounder than this. */
260 #define BIGGEST_ALIGNMENT 32
262 /* Alignment of field after `int : 0' in a structure. */
263 #define EMPTY_FIELD_BOUNDARY 32
265 /* Every structure's size must be a multiple of this. */
266 #define STRUCTURE_SIZE_BOUNDARY 8
268 /* A bitfield declared as `int' forces `int' alignment for the struct. */
269 #define PCC_BITFIELD_TYPE_MATTERS 1
271 /* Make strings word-aligned so strcpy from constants will be faster. */
272 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
273 (TREE_CODE (EXP) == STRING_CST \
274 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
276 /* Make arrays of chars word-aligned for the same reasons. */
277 #define DATA_ALIGNMENT(TYPE, ALIGN) \
278 (TREE_CODE (TYPE) == ARRAY_TYPE \
279 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
280 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
282 /* Non-zero if move instructions will actually fail to work
283 when given unaligned data. */
284 #define STRICT_ALIGNMENT 0
286 /* Standard register usage. */
288 /* Number of actual hardware registers.
289 The hardware registers are assigned numbers for the compiler
290 from 0 to just below FIRST_PSEUDO_REGISTER.
291 All registers that the compiler knows about must be given numbers,
292 even those that are not normally considered general registers.
294 RS/6000 has 32 fixed-point registers, 32 floating-point registers,
295 an MQ register, a count register, a link register, and 8 condition
296 register fields, which we view here as separate registers.
298 In addition, the difference between the frame and argument pointers is
299 a function of the number of registers saved, so we need to have a
300 register for AP that will later be eliminated in favor of SP or FP.
301 This is a normal register, but it is fixed. */
303 #define FIRST_PSEUDO_REGISTER 76
305 /* 1 for registers that have pervasive standard uses
306 and are not available for the register allocator.
308 On RS/6000, r1 is used for the stack and r2 is used as the TOC pointer.
310 cr5 is not supposed to be used. */
312 #define FIXED_REGISTERS \
313 {0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
314 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
315 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
316 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
317 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0}
319 /* 1 for registers not available across function calls.
320 These must include the FIXED_REGISTERS and also any
321 registers that can be used without being saved.
322 The latter must include the registers where values are returned
323 and the register where structure-value addresses are passed.
324 Aside from that, you can include as many other registers as you like. */
326 #define CALL_USED_REGISTERS \
327 {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, \
328 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
329 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, \
330 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
331 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1}
333 /* List the order in which to allocate registers. Each register must be
334 listed once, even those in FIXED_REGISTERS.
336 We allocate in the following order:
337 fp0 (not saved or used for anything)
338 fp13 - fp2 (not saved; incoming fp arg registers)
339 fp1 (not saved; return value)
340 fp31 - fp14 (saved; order given to save least number)
341 cr1, cr6, cr7 (not saved or special)
342 cr0 (not saved, but used for arithmetic operations)
343 cr2, cr3, cr4 (saved)
344 r0 (not saved; cannot be base reg)
345 r9 (not saved; best for TImode)
346 r11, r10, r8-r4 (not saved; highest used first to make less conflict)
347 r3 (not saved; return value register)
348 r31 - r13 (saved; order given to save least number)
349 r12 (not saved; if used for DImode or DFmode would use r13)
350 mq (not saved; best to use it if we can)
351 ctr (not saved; when we have the choice ctr is better)
353 cr5, r1, r2, ap (fixed) */
355 #define REG_ALLOC_ORDER \
357 45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, \
359 63, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, \
360 50, 49, 48, 47, 46, \
361 69, 74, 75, 68, 70, 71, 72, \
363 9, 11, 10, 8, 7, 6, 5, 4, \
365 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, \
366 18, 17, 16, 15, 14, 13, 12, \
370 /* True if register is floating-point. */
371 #define FP_REGNO_P(N) ((N) >= 32 && (N) <= 63)
373 /* True if register is a condition register. */
374 #define CR_REGNO_P(N) ((N) >= 68 && (N) <= 75)
376 /* True if register is an integer register. */
377 #define INT_REGNO_P(N) ((N) <= 31 || (N) == 67)
379 /* Return number of consecutive hard regs needed starting at reg REGNO
380 to hold something of mode MODE.
381 This is ordinarily the length in words of a value of mode MODE
382 but can be less for certain modes in special long registers.
384 On RS/6000, ordinary registers hold 32 bits worth;
385 a single floating point register holds 64 bits worth. */
387 #define HARD_REGNO_NREGS(REGNO, MODE) \
388 (FP_REGNO_P (REGNO) \
389 ? ((GET_MODE_SIZE (MODE) + 2 * UNITS_PER_WORD - 1) / (2 * UNITS_PER_WORD)) \
390 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
392 /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
393 On RS/6000, the cpu registers can hold any mode but the float registers
394 can hold only floating modes and CR register can only hold CC modes. We
395 cannot put DImode or TImode anywhere except general register and they
396 must be able to fit within the register set. */
398 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
399 (FP_REGNO_P (REGNO) ? GET_MODE_CLASS (MODE) == MODE_FLOAT \
400 : CR_REGNO_P (REGNO) ? GET_MODE_CLASS (MODE) == MODE_CC \
401 : ! INT_REGNO_P (REGNO) ? (GET_MODE_CLASS (MODE) == MODE_INT \
402 && GET_MODE_SIZE (MODE) <= UNITS_PER_WORD) \
405 /* Value is 1 if it is a good idea to tie two pseudo registers
406 when one has mode MODE1 and one has mode MODE2.
407 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
408 for any hard reg, then this must be 0 for correct output. */
409 #define MODES_TIEABLE_P(MODE1, MODE2) \
410 (GET_MODE_CLASS (MODE1) == MODE_FLOAT \
411 ? GET_MODE_CLASS (MODE2) == MODE_FLOAT \
412 : GET_MODE_CLASS (MODE2) == MODE_FLOAT \
413 ? GET_MODE_CLASS (MODE1) == MODE_FLOAT \
414 : GET_MODE_CLASS (MODE1) == MODE_CC \
415 ? GET_MODE_CLASS (MODE2) == MODE_CC \
416 : GET_MODE_CLASS (MODE2) == MODE_CC \
417 ? GET_MODE_CLASS (MODE1) == MODE_CC \
420 /* A C expression returning the cost of moving data from a register of class
421 CLASS1 to one of CLASS2.
423 On the RS/6000, copying between floating-point and fixed-point
424 registers is expensive. */
426 #define REGISTER_MOVE_COST(CLASS1, CLASS2) \
427 ((CLASS1) == FLOAT_REGS && (CLASS2) == FLOAT_REGS ? 2 \
428 : (CLASS1) == FLOAT_REGS && (CLASS2) != FLOAT_REGS ? 10 \
429 : (CLASS1) != FLOAT_REGS && (CLASS2) == FLOAT_REGS ? 10 \
432 /* A C expressions returning the cost of moving data of MODE from a register to
435 On the RS/6000, bump this up a bit. */
437 #define MEMORY_MOVE_COST(MODE) 6
439 /* Specify the cost of a branch insn; roughly the number of extra insns that
440 should be added to avoid a branch.
442 Set this to 3 on the RS/6000 since that is roughly the average cost of an
443 unscheduled conditional branch. */
445 #define BRANCH_COST 3
447 /* A C statement (sans semicolon) to update the integer variable COST
448 based on the relationship between INSN that is dependent on
449 DEP_INSN through the dependence LINK. The default is to make no
450 adjustment to COST. On the RS/6000, ignore the cost of anti- and
451 output-dependencies. In fact, output dependencies on the CR do have
452 a cost, but it is probably not worthwhile to track it. */
454 #define ADJUST_COST(INSN,LINK,DEP_INSN,COST) \
455 if (REG_NOTE_KIND (LINK) != 0) \
456 (COST) = 0; /* Anti or output dependence. */
458 /* Define this macro to change register usage conditional on target flags.
459 Set MQ register fixed (already call_used) if not POWER architecture
460 (RIOS1, RIOS2, and PPC601) so that it will not be allocated.
461 Provide alternate register names for ppcas assembler */
463 #define CONDITIONAL_REGISTER_USAGE \
467 /* Specify the registers used for certain standard purposes.
468 The values of these macros are register numbers. */
470 /* RS/6000 pc isn't overloaded on a register that the compiler knows about. */
471 /* #define PC_REGNUM */
473 /* Register to use for pushing function arguments. */
474 #define STACK_POINTER_REGNUM 1
476 /* Base register for access to local variables of the function. */
477 #define FRAME_POINTER_REGNUM 31
479 /* Value should be nonzero if functions must have frame pointers.
480 Zero means the frame pointer need not be set up (and parms
481 may be accessed via the stack pointer) in functions that seem suitable.
482 This is computed in `reload', in reload1.c. */
483 #define FRAME_POINTER_REQUIRED 0
485 /* Base register for access to arguments of the function. */
486 #define ARG_POINTER_REGNUM 67
488 /* Place to put static chain when calling a function that requires it. */
489 #define STATIC_CHAIN_REGNUM 11
491 /* Place that structure value return address is placed.
493 On the RS/6000, it is passed as an extra parameter. */
494 #define STRUCT_VALUE 0
496 /* Define the classes of registers for register constraints in the
497 machine description. Also define ranges of constants.
499 One of the classes must always be named ALL_REGS and include all hard regs.
500 If there is more than one class, another class must be named NO_REGS
501 and contain no registers.
503 The name GENERAL_REGS must be the name of a class (or an alias for
504 another name such as ALL_REGS). This is the class of registers
505 that is allowed by "g" or "r" in a register constraint.
506 Also, registers outside this class are allocated only when
507 instructions express preferences for them.
509 The classes must be numbered in nondecreasing order; that is,
510 a larger-numbered class must never be contained completely
511 in a smaller-numbered class.
513 For any two classes, it is very desirable that there be another
514 class that represents their union. */
516 /* The RS/6000 has three types of registers, fixed-point, floating-point,
517 and condition registers, plus three special registers, MQ, CTR, and the
520 However, r0 is special in that it cannot be used as a base register.
521 So make a class for registers valid as base registers.
523 Also, cr0 is the only condition code register that can be used in
524 arithmetic insns, so make a separate class for it. */
526 enum reg_class { NO_REGS, BASE_REGS, GENERAL_REGS, FLOAT_REGS,
527 NON_SPECIAL_REGS, MQ_REGS, LINK_REGS, CTR_REGS, LINK_OR_CTR_REGS,
528 SPECIAL_REGS, SPEC_OR_GEN_REGS, CR0_REGS, CR_REGS, NON_FLOAT_REGS,
529 ALL_REGS, LIM_REG_CLASSES };
531 #define N_REG_CLASSES (int) LIM_REG_CLASSES
533 /* Give names of register classes as strings for dump file. */
535 #define REG_CLASS_NAMES \
536 { "NO_REGS", "BASE_REGS", "GENERAL_REGS", "FLOAT_REGS", \
537 "NON_SPECIAL_REGS", "MQ_REGS", "LINK_REGS", "CTR_REGS", \
538 "LINK_OR_CTR_REGS", "SPECIAL_REGS", "SPEC_OR_GEN_REGS", \
539 "CR0_REGS", "CR_REGS", "NON_FLOAT_REGS", "ALL_REGS" }
541 /* Define which registers fit in which classes.
542 This is an initializer for a vector of HARD_REG_SET
543 of length N_REG_CLASSES. */
545 #define REG_CLASS_CONTENTS \
546 { {0, 0, 0}, {0xfffffffe, 0, 8}, {~0, 0, 8}, \
547 {0, ~0, 0}, {~0, ~0, 8}, {0, 0, 1}, {0, 0, 2}, \
548 {0, 0, 4}, {0, 0, 6}, {0, 0, 7}, {~0, 0, 15}, \
549 {0, 0, 16}, {0, 0, 0xff0}, {~0, 0, 0xffff}, \
552 /* The same information, inverted:
553 Return the class number of the smallest class containing
554 reg number REGNO. This could be a conditional expression
555 or could index an array. */
557 #define REGNO_REG_CLASS(REGNO) \
558 ((REGNO) == 0 ? GENERAL_REGS \
559 : (REGNO) < 32 ? BASE_REGS \
560 : FP_REGNO_P (REGNO) ? FLOAT_REGS \
561 : (REGNO) == 68 ? CR0_REGS \
562 : CR_REGNO_P (REGNO) ? CR_REGS \
563 : (REGNO) == 64 ? MQ_REGS \
564 : (REGNO) == 65 ? LINK_REGS \
565 : (REGNO) == 66 ? CTR_REGS \
566 : (REGNO) == 67 ? BASE_REGS \
569 /* The class value for index registers, and the one for base regs. */
570 #define INDEX_REG_CLASS GENERAL_REGS
571 #define BASE_REG_CLASS BASE_REGS
573 /* Get reg_class from a letter such as appears in the machine description. */
575 #define REG_CLASS_FROM_LETTER(C) \
576 ((C) == 'f' ? FLOAT_REGS \
577 : (C) == 'b' ? BASE_REGS \
578 : (C) == 'h' ? SPECIAL_REGS \
579 : (C) == 'q' ? MQ_REGS \
580 : (C) == 'c' ? CTR_REGS \
581 : (C) == 'l' ? LINK_REGS \
582 : (C) == 'x' ? CR0_REGS \
583 : (C) == 'y' ? CR_REGS \
586 /* The letters I, J, K, L, M, N, and P in a register constraint string
587 can be used to stand for particular ranges of immediate operands.
588 This macro defines what the ranges are.
589 C is the letter, and VALUE is a constant value.
590 Return 1 if VALUE is in the range specified by C.
592 `I' is signed 16-bit constants
593 `J' is a constant with only the high-order 16 bits non-zero
594 `K' is a constant with only the low-order 16 bits non-zero
595 `L' is a constant that can be placed into a mask operand
596 `M' is a constant that is greater than 31
597 `N' is a constant that is an exact power of two
598 `O' is the constant zero
599 `P' is a constant whose negation is a signed 16-bit constant */
601 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
602 ( (C) == 'I' ? (unsigned) ((VALUE) + 0x8000) < 0x10000 \
603 : (C) == 'J' ? ((VALUE) & 0xffff) == 0 \
604 : (C) == 'K' ? ((VALUE) & 0xffff0000) == 0 \
605 : (C) == 'L' ? mask_constant (VALUE) \
606 : (C) == 'M' ? (VALUE) > 31 \
607 : (C) == 'N' ? exact_log2 (VALUE) >= 0 \
608 : (C) == 'O' ? (VALUE) == 0 \
609 : (C) == 'P' ? (unsigned) ((- (VALUE)) + 0x8000) < 0x1000 \
612 /* Similar, but for floating constants, and defining letters G and H.
613 Here VALUE is the CONST_DOUBLE rtx itself.
615 We flag for special constants when we can copy the constant into
616 a general register in two insns for DF and one insn for SF. */
618 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
619 ((C) == 'G' ? easy_fp_constant (VALUE, GET_MODE (VALUE)) : 0)
621 /* Optional extra constraints for this machine.
623 For the RS/6000, `Q' means that this is a memory operand that is just
624 an offset from a register. */
626 #define EXTRA_CONSTRAINT(OP, C) \
627 ((C) == 'Q' ? GET_CODE (OP) == MEM && GET_CODE (XEXP (OP, 0)) == REG \
630 /* Given an rtx X being reloaded into a reg required to be
631 in class CLASS, return the class of reg to actually use.
632 In general this is just CLASS; but on some machines
633 in some cases it is preferable to use a more restrictive class.
635 On the RS/6000, we have to return NO_REGS when we want to reload a
636 floating-point CONST_DOUBLE to force it to be copied to memory. */
638 #define PREFERRED_RELOAD_CLASS(X,CLASS) \
639 ((GET_CODE (X) == CONST_DOUBLE \
640 && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT) \
643 /* Return the register class of a scratch register needed to copy IN into
644 or out of a register in CLASS in MODE. If it can be done directly,
645 NO_REGS is returned. */
647 #define SECONDARY_RELOAD_CLASS(CLASS,MODE,IN) \
648 secondary_reload_class (CLASS, MODE, IN)
650 /* If we are copying between FP registers and anything else, we need a memory
653 #define SECONDARY_MEMORY_NEEDED(CLASS1,CLASS2,MODE) \
654 ((CLASS1) != (CLASS2) && ((CLASS1) == FLOAT_REGS || (CLASS2) == FLOAT_REGS))
656 /* Return the maximum number of consecutive registers
657 needed to represent mode MODE in a register of class CLASS.
659 On RS/6000, this is the size of MODE in words,
660 except in the FP regs, where a single reg is enough for two words. */
661 #define CLASS_MAX_NREGS(CLASS, MODE) \
662 ((CLASS) == FLOAT_REGS \
663 ? ((GET_MODE_SIZE (MODE) + 2 * UNITS_PER_WORD - 1) / (2 * UNITS_PER_WORD)) \
664 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
666 /* Stack layout; function entry, exit and calling. */
668 /* Define this if pushing a word on the stack
669 makes the stack pointer a smaller address. */
670 #define STACK_GROWS_DOWNWARD
672 /* Define this if the nominal address of the stack frame
673 is at the high-address end of the local variables;
674 that is, each additional local variable allocated
675 goes at a more negative offset in the frame.
677 On the RS/6000, we grow upwards, from the area after the outgoing
679 /* #define FRAME_GROWS_DOWNWARD */
681 /* Offset within stack frame to start allocating local variables at.
682 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
683 first local allocated. Otherwise, it is the offset to the BEGINNING
684 of the first local allocated.
686 On the RS/6000, the frame pointer is the same as the stack pointer,
687 except for dynamic allocations. So we start after the fixed area and
688 outgoing parameter area. */
690 #define STARTING_FRAME_OFFSET (current_function_outgoing_args_size + 24)
692 /* If we generate an insn to push BYTES bytes,
693 this says how many the stack pointer really advances by.
694 On RS/6000, don't define this because there are no push insns. */
695 /* #define PUSH_ROUNDING(BYTES) */
697 /* Offset of first parameter from the argument pointer register value.
698 On the RS/6000, we define the argument pointer to the start of the fixed
700 #define FIRST_PARM_OFFSET(FNDECL) 24
702 /* Define this if stack space is still allocated for a parameter passed
703 in a register. The value is the number of bytes allocated to this
705 #define REG_PARM_STACK_SPACE(FNDECL) 32
707 /* Define this if the above stack space is to be considered part of the
708 space allocated by the caller. */
709 #define OUTGOING_REG_PARM_STACK_SPACE
711 /* This is the difference between the logical top of stack and the actual sp.
713 For the RS/6000, sp points past the fixed area. */
714 #define STACK_POINTER_OFFSET 24
716 /* Define this if the maximum size of all the outgoing args is to be
717 accumulated and pushed during the prologue. The amount can be
718 found in the variable current_function_outgoing_args_size. */
719 #define ACCUMULATE_OUTGOING_ARGS
721 /* Value is the number of bytes of arguments automatically
722 popped when returning from a subroutine call.
723 FUNTYPE is the data type of the function (as a tree),
724 or for a library call it is an identifier node for the subroutine name.
725 SIZE is the number of bytes of arguments passed on the stack. */
727 #define RETURN_POPS_ARGS(FUNTYPE,SIZE) 0
729 /* Define how to find the value returned by a function.
730 VALTYPE is the data type of the value (as a tree).
731 If the precise function being called is known, FUNC is its FUNCTION_DECL;
732 otherwise, FUNC is 0.
734 On RS/6000 an integer value is in r3 and a floating-point value is in
737 #define FUNCTION_VALUE(VALTYPE, FUNC) \
738 gen_rtx (REG, TYPE_MODE (VALTYPE), \
739 TREE_CODE (VALTYPE) == REAL_TYPE ? 33 : 3)
741 /* Define how to find the value returned by a library function
742 assuming the value has mode MODE. */
744 #define LIBCALL_VALUE(MODE) \
745 gen_rtx (REG, MODE, GET_MODE_CLASS (MODE) == MODE_FLOAT ? 33 : 3)
747 /* The definition of this macro implies that there are cases where
748 a scalar value cannot be returned in registers.
750 For the RS/6000, any structure or union type is returned in memory. */
752 #define RETURN_IN_MEMORY(TYPE) \
753 (TYPE_MODE (TYPE) == BLKmode)
755 /* 1 if N is a possible register number for a function value
756 as seen by the caller.
758 On RS/6000, this is r3 and fp1. */
760 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 3 || ((N) == 33))
762 /* 1 if N is a possible register number for function argument passing.
763 On RS/6000, these are r3-r10 and fp1-fp13. */
765 #define FUNCTION_ARG_REGNO_P(N) \
766 (((N) <= 10 && (N) >= 3) || ((N) >= 33 && (N) <= 45))
768 /* Define a data type for recording info about an argument list
769 during the scan of that argument list. This data type should
770 hold all necessary information about the function itself
771 and about the args processed so far, enough to enable macros
772 such as FUNCTION_ARG to determine where the next arg should go.
774 On the RS/6000, this is a structure. The first element is the number of
775 total argument words, the second is used to store the next
776 floating-point register number, and the third says how many more args we
777 have prototype types for. */
779 struct rs6000_args {int words, fregno, nargs_prototype; };
780 #define CUMULATIVE_ARGS struct rs6000_args
782 /* Define intermediate macro to compute the size (in registers) of an argument
785 #define RS6000_ARG_SIZE(MODE, TYPE, NAMED) \
787 : (MODE) != BLKmode \
788 ? (GET_MODE_SIZE (MODE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD \
789 : (int_size_in_bytes (TYPE) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD)
791 /* Initialize a variable CUM of type CUMULATIVE_ARGS
792 for a call to a function whose data type is FNTYPE.
793 For a library call, FNTYPE is 0. */
795 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME) \
798 (CUM).nargs_prototype = (FNTYPE && TYPE_ARG_TYPES (FNTYPE) \
799 ? (list_length (TYPE_ARG_TYPES (FNTYPE)) - 1 \
800 + (TYPE_MODE (TREE_TYPE (FNTYPE)) == BLKmode \
801 || RETURN_IN_MEMORY (TREE_TYPE (FNTYPE)))) \
804 /* Similar, but when scanning the definition of a procedure. We always
805 set NARGS_PROTOTYPE large so we never return an EXPR_LIST. */
807 #define INIT_CUMULATIVE_INCOMING_ARGS(CUM,FNTYPE,IGNORE) \
810 (CUM).nargs_prototype = 1000
812 /* Update the data in CUM to advance over an argument
813 of mode MODE and data type TYPE.
814 (TYPE is null for libcalls where that information may not be available.) */
816 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
817 { (CUM).nargs_prototype--; \
820 (CUM).words += RS6000_ARG_SIZE (MODE, TYPE, NAMED); \
821 if (GET_MODE_CLASS (MODE) == MODE_FLOAT) \
826 /* Non-zero if we can use a floating-point register to pass this arg. */
827 #define USE_FP_FOR_ARG_P(CUM,MODE,TYPE) \
828 (GET_MODE_CLASS (MODE) == MODE_FLOAT && (CUM).fregno < 46)
830 /* Determine where to put an argument to a function.
831 Value is zero to push the argument on the stack,
832 or a hard register in which to store the argument.
834 MODE is the argument's machine mode.
835 TYPE is the data type of the argument (as a tree).
836 This is null for libcalls where that information may
838 CUM is a variable of type CUMULATIVE_ARGS which gives info about
839 the preceding args and about the function being called.
840 NAMED is nonzero if this argument is a named parameter
841 (otherwise it is an extra parameter matching an ellipsis).
843 On RS/6000 the first eight words of non-FP are normally in registers
844 and the rest are pushed. The first 13 FP args are in registers.
846 If this is floating-point and no prototype is specified, we use
847 both an FP and integer register (or possibly FP reg and stack). Library
848 functions (when TYPE is zero) always have the proper types for args,
849 so we can pass the FP value just in one register. emit_library_function
850 doesn't support EXPR_LIST anyway. */
852 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
854 : ((TYPE) != 0 && TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST) ? 0 \
855 : USE_FP_FOR_ARG_P (CUM, MODE, TYPE) \
856 ? ((CUM).nargs_prototype > 0 || (TYPE) == 0 \
857 ? gen_rtx (REG, MODE, (CUM).fregno) \
859 ? gen_rtx (EXPR_LIST, VOIDmode, \
860 gen_rtx (REG, (MODE), 3 + (CUM).words), \
861 gen_rtx (REG, (MODE), (CUM).fregno)) \
862 : gen_rtx (EXPR_LIST, VOIDmode, 0, \
863 gen_rtx (REG, (MODE), (CUM).fregno)))) \
864 : (CUM).words < 8 ? gen_rtx(REG, (MODE), 3 + (CUM).words) : 0)
866 /* For an arg passed partly in registers and partly in memory,
867 this is the number of registers used.
868 For args passed entirely in registers or entirely in memory, zero. */
870 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
872 : USE_FP_FOR_ARG_P (CUM, MODE, TYPE) && (CUM).nargs_prototype >= 0 ? 0 \
873 : (((CUM).words < 8 \
874 && 8 < ((CUM).words + RS6000_ARG_SIZE (MODE, TYPE, NAMED))) \
875 ? 8 - (CUM).words : 0))
877 /* Perform any needed actions needed for a function that is receiving a
878 variable number of arguments.
882 MODE and TYPE are the mode and type of the current parameter.
884 PRETEND_SIZE is a variable that should be set to the amount of stack
885 that must be pushed by the prolog to pretend that our caller pushed
888 Normally, this macro will push all remaining incoming registers on the
889 stack and set PRETEND_SIZE to the length of the registers pushed. */
891 #define SETUP_INCOMING_VARARGS(CUM,MODE,TYPE,PRETEND_SIZE,NO_RTL) \
892 { if ((CUM).words < 8) \
894 int first_reg_offset = (CUM).words; \
896 if (MUST_PASS_IN_STACK (MODE, TYPE)) \
897 first_reg_offset += RS6000_ARG_SIZE (TYPE_MODE (TYPE), TYPE, 1); \
899 if (first_reg_offset > 8) \
900 first_reg_offset = 8; \
902 if (! (NO_RTL) && first_reg_offset != 8) \
903 move_block_from_reg \
904 (3 + first_reg_offset, \
905 gen_rtx (MEM, BLKmode, \
906 plus_constant (virtual_incoming_args_rtx, \
907 first_reg_offset * 4)), \
908 8 - first_reg_offset, (8 - first_reg_offset) * UNITS_PER_WORD); \
909 PRETEND_SIZE = (8 - first_reg_offset) * UNITS_PER_WORD; \
913 /* This macro generates the assembly code for function entry.
914 FILE is a stdio stream to output the code to.
915 SIZE is an int: how many units of temporary storage to allocate.
916 Refer to the array `regs_ever_live' to determine which registers
917 to save; `regs_ever_live[I]' is nonzero if register number I
918 is ever used in the function. This macro is responsible for
919 knowing which registers should not be saved even if used. */
921 #define FUNCTION_PROLOGUE(FILE, SIZE) output_prolog (FILE, SIZE)
923 /* Output assembler code to FILE to increment profiler label # LABELNO
924 for profiling a function entry. */
926 #define FUNCTION_PROFILER(FILE, LABELNO) \
927 output_function_profiler ((FILE), (LABELNO));
929 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
930 the stack pointer does not matter. No definition is equivalent to
933 On the RS/6000, this is non-zero because we can restore the stack from
934 its backpointer, which we maintain. */
935 #define EXIT_IGNORE_STACK 1
937 /* This macro generates the assembly code for function exit,
938 on machines that need it. If FUNCTION_EPILOGUE is not defined
939 then individual return instructions are generated for each
940 return statement. Args are same as for FUNCTION_PROLOGUE.
942 The function epilogue should not depend on the current stack pointer!
943 It should use the frame pointer only. This is mandatory because
944 of alloca; we also take advantage of it to omit stack adjustments
947 #define FUNCTION_EPILOGUE(FILE, SIZE) output_epilog (FILE, SIZE)
949 /* Output assembler code for a block containing the constant parts
950 of a trampoline, leaving space for the variable parts.
952 The trampoline should set the static chain pointer to value placed
953 into the trampoline and should branch to the specified routine.
955 On the RS/6000, this is not code at all, but merely a data area,
956 since that is the way all functions are called. The first word is
957 the address of the function, the second word is the TOC pointer (r2),
958 and the third word is the static chain value. */
960 #define TRAMPOLINE_TEMPLATE(FILE) { fprintf (FILE, "\t.long 0, 0, 0\n"); }
962 /* Length in units of the trampoline for entering a nested function. */
964 #define TRAMPOLINE_SIZE 12
966 /* Emit RTL insns to initialize the variable parts of a trampoline.
967 FNADDR is an RTX for the address of the function's pure code.
968 CXT is an RTX for the static chain value for the function. */
970 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, CXT) \
972 emit_move_insn (gen_rtx (MEM, SImode, \
973 memory_address (SImode, (ADDR))), \
974 gen_rtx (MEM, SImode, \
975 memory_address (SImode, (FNADDR)))); \
976 emit_move_insn (gen_rtx (MEM, SImode, \
977 memory_address (SImode, \
978 plus_constant ((ADDR), 4))), \
979 gen_rtx (MEM, SImode, \
980 memory_address (SImode, \
981 plus_constant ((FNADDR), 4)))); \
982 emit_move_insn (gen_rtx (MEM, SImode, \
983 memory_address (SImode, \
984 plus_constant ((ADDR), 8))), \
985 force_reg (SImode, (CXT))); \
988 /* Definitions for register eliminations.
990 We have two registers that can be eliminated on the RS/6000. First, the
991 frame pointer register can often be eliminated in favor of the stack
992 pointer register. Secondly, the argument pointer register can always be
993 eliminated; it is replaced with either the stack or frame pointer.
995 In addition, we use the elimination mechanism to see if r30 is needed
996 Initially we assume that it isn't. If it is, we spill it. This is done
997 by making it an eliminable register. We replace it with itself so that
998 if it isn't needed, then existing uses won't be modified. */
1000 /* This is an array of structures. Each structure initializes one pair
1001 of eliminable registers. The "from" register number is given first,
1002 followed by "to". Eliminations of the same "from" register are listed
1003 in order of preference. */
1004 #define ELIMINABLE_REGS \
1005 {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1006 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
1007 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
1010 /* Given FROM and TO register numbers, say whether this elimination is allowed.
1011 Frame pointer elimination is automatically handled.
1013 For the RS/6000, if frame pointer elimination is being done, we would like
1014 to convert ap into fp, not sp.
1016 We need r30 if -mmininal-toc was specified, and there are constant pool
1019 #define CAN_ELIMINATE(FROM, TO) \
1020 ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \
1021 ? ! frame_pointer_needed \
1022 : (FROM) == 30 ? ! TARGET_MINIMAL_TOC || get_pool_size () == 0 \
1025 /* Define the offset between two registers, one to be eliminated, and the other
1026 its replacement, at the start of a routine. */
1027 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1029 int total_stack_size = (rs6000_sa_size () + get_frame_size () \
1030 + current_function_outgoing_args_size); \
1032 total_stack_size = (total_stack_size + 7) & ~7; \
1034 if ((FROM) == FRAME_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \
1036 if (rs6000_pushes_stack ()) \
1039 (OFFSET) = - total_stack_size; \
1041 else if ((FROM) == ARG_POINTER_REGNUM && (TO) == FRAME_POINTER_REGNUM) \
1042 (OFFSET) = total_stack_size; \
1043 else if ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \
1045 if (rs6000_pushes_stack ()) \
1046 (OFFSET) = total_stack_size; \
1050 else if ((FROM) == 30) \
1056 /* Addressing modes, and classification of registers for them. */
1058 /* #define HAVE_POST_INCREMENT */
1059 /* #define HAVE_POST_DECREMENT */
1061 #define HAVE_PRE_DECREMENT
1062 #define HAVE_PRE_INCREMENT
1064 /* Macros to check register numbers against specific register classes. */
1066 /* These assume that REGNO is a hard or pseudo reg number.
1067 They give nonzero only if REGNO is a hard reg of the suitable class
1068 or a pseudo reg currently allocated to a suitable hard reg.
1069 Since they use reg_renumber, they are safe only once reg_renumber
1070 has been allocated, which happens in local-alloc.c. */
1072 #define REGNO_OK_FOR_INDEX_P(REGNO) \
1073 ((REGNO) < FIRST_PSEUDO_REGISTER \
1074 ? (REGNO) <= 31 || (REGNO) == 67 \
1075 : (reg_renumber[REGNO] >= 0 \
1076 && (reg_renumber[REGNO] <= 31 || reg_renumber[REGNO] == 67)))
1078 #define REGNO_OK_FOR_BASE_P(REGNO) \
1079 ((REGNO) < FIRST_PSEUDO_REGISTER \
1080 ? ((REGNO) > 0 && (REGNO) <= 31) || (REGNO) == 67 \
1081 : (reg_renumber[REGNO] > 0 \
1082 && (reg_renumber[REGNO] <= 31 || reg_renumber[REGNO] == 67)))
1084 /* Maximum number of registers that can appear in a valid memory address. */
1086 #define MAX_REGS_PER_ADDRESS 2
1088 /* Recognize any constant value that is a valid address. */
1090 #define CONSTANT_ADDRESS_P(X) \
1091 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
1092 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST \
1093 || GET_CODE (X) == HIGH)
1095 /* Nonzero if the constant value X is a legitimate general operand.
1096 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.
1098 On the RS/6000, all integer constants are acceptable, most won't be valid
1099 for particular insns, though. Only easy FP constants are
1102 #define LEGITIMATE_CONSTANT_P(X) \
1103 (GET_CODE (X) != CONST_DOUBLE || GET_MODE (X) == VOIDmode \
1104 || easy_fp_constant (X, GET_MODE (X)))
1106 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
1107 and check its validity for a certain class.
1108 We have two alternate definitions for each of them.
1109 The usual definition accepts all pseudo regs; the other rejects
1110 them unless they have been allocated suitable hard regs.
1111 The symbol REG_OK_STRICT causes the latter definition to be used.
1113 Most source files want to accept pseudo regs in the hope that
1114 they will get allocated to the class that the insn wants them to be in.
1115 Source files for reload pass need to be strict.
1116 After reload, it makes no difference, since pseudo regs have
1117 been eliminated by then. */
1119 #ifndef REG_OK_STRICT
1121 /* Nonzero if X is a hard reg that can be used as an index
1122 or if it is a pseudo reg. */
1123 #define REG_OK_FOR_INDEX_P(X) \
1124 (REGNO (X) <= 31 || REGNO (X) == 67 || REGNO (X) >= FIRST_PSEUDO_REGISTER)
1126 /* Nonzero if X is a hard reg that can be used as a base reg
1127 or if it is a pseudo reg. */
1128 #define REG_OK_FOR_BASE_P(X) \
1129 (REGNO (X) > 0 && REG_OK_FOR_INDEX_P (X))
1133 /* Nonzero if X is a hard reg that can be used as an index. */
1134 #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
1135 /* Nonzero if X is a hard reg that can be used as a base reg. */
1136 #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
1140 /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
1141 that is a valid memory address for an instruction.
1142 The MODE argument is the machine mode for the MEM expression
1143 that wants to use this address.
1145 On the RS/6000, there are four valid address: a SYMBOL_REF that
1146 refers to a constant pool entry of an address (or the sum of it
1147 plus a constant), a short (16-bit signed) constant plus a register,
1148 the sum of two registers, or a register indirect, possibly with an
1149 auto-increment. For DFmode and DImode with an constant plus register,
1150 we must ensure that both words are addressable. */
1152 #define LEGITIMATE_CONSTANT_POOL_BASE_P(X) \
1153 (GET_CODE (X) == SYMBOL_REF && CONSTANT_POOL_ADDRESS_P (X) \
1154 && ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (get_pool_constant (X)))
1156 #define LEGITIMATE_CONSTANT_POOL_ADDRESS_P(X) \
1157 (LEGITIMATE_CONSTANT_POOL_BASE_P (X) \
1158 || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \
1159 && GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT \
1160 && LEGITIMATE_CONSTANT_POOL_BASE_P (XEXP (XEXP (X, 0), 0))))
1162 #define LEGITIMATE_ADDRESS_INTEGER_P(X,OFFSET) \
1163 (GET_CODE (X) == CONST_INT \
1164 && (unsigned) (INTVAL (X) + (OFFSET) + 0x8000) < 0x10000)
1166 #define LEGITIMATE_OFFSET_ADDRESS_P(MODE,X) \
1167 (GET_CODE (X) == PLUS \
1168 && GET_CODE (XEXP (X, 0)) == REG \
1169 && REG_OK_FOR_BASE_P (XEXP (X, 0)) \
1170 && LEGITIMATE_ADDRESS_INTEGER_P (XEXP (X, 1), 0) \
1171 && (((MODE) != DFmode && (MODE) != DImode) \
1172 || LEGITIMATE_ADDRESS_INTEGER_P (XEXP (X, 1), 4)))
1174 #define LEGITIMATE_INDEXED_ADDRESS_P(X) \
1175 (GET_CODE (X) == PLUS \
1176 && GET_CODE (XEXP (X, 0)) == REG \
1177 && GET_CODE (XEXP (X, 1)) == REG \
1178 && ((REG_OK_FOR_BASE_P (XEXP (X, 0)) \
1179 && REG_OK_FOR_INDEX_P (XEXP (X, 1))) \
1180 || (REG_OK_FOR_BASE_P (XEXP (X, 1)) \
1181 && REG_OK_FOR_INDEX_P (XEXP (X, 0)))))
1183 #define LEGITIMATE_INDIRECT_ADDRESS_P(X) \
1184 (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X))
1186 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
1187 { if (LEGITIMATE_INDIRECT_ADDRESS_P (X)) \
1189 if (GET_CODE (X) == PRE_INC \
1190 && LEGITIMATE_INDIRECT_ADDRESS_P (XEXP (X, 0))) \
1192 if (GET_CODE (X) == PRE_DEC \
1193 && LEGITIMATE_INDIRECT_ADDRESS_P (XEXP (X, 0))) \
1195 if (LEGITIMATE_CONSTANT_POOL_ADDRESS_P (X)) \
1197 if (LEGITIMATE_OFFSET_ADDRESS_P (MODE, X)) \
1199 if ((MODE) != DImode && (MODE) != TImode \
1200 && LEGITIMATE_INDEXED_ADDRESS_P (X)) \
1204 /* Try machine-dependent ways of modifying an illegitimate address
1205 to be legitimate. If we find one, return the new, valid address.
1206 This macro is used in only one place: `memory_address' in explow.c.
1208 OLDX is the address as it was before break_out_memory_refs was called.
1209 In some cases it is useful to look at this to decide what needs to be done.
1211 MODE and WIN are passed so that this macro can use
1212 GO_IF_LEGITIMATE_ADDRESS.
1214 It is always safe for this macro to do nothing. It exists to recognize
1215 opportunities to optimize the output.
1217 On RS/6000, first check for the sum of a register with a constant
1218 integer that is out of range. If so, generate code to add the
1219 constant with the low-order 16 bits masked to the register and force
1220 this result into another register (this can be done with `cau').
1221 Then generate an address of REG+(CONST&0xffff), allowing for the
1222 possibility of bit 16 being a one.
1224 Then check for the sum of a register and something not constant, try to
1225 load the other things into a register and return the sum. */
1227 #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) \
1228 { if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == REG \
1229 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1230 && (unsigned) (INTVAL (XEXP (X, 1)) + 0x8000) >= 0x10000) \
1231 { int high_int, low_int; \
1232 high_int = INTVAL (XEXP (X, 1)) >> 16; \
1233 low_int = INTVAL (XEXP (X, 1)) & 0xffff; \
1234 if (low_int & 0x8000) \
1235 high_int += 1, low_int |= 0xffff0000; \
1236 (X) = gen_rtx (PLUS, SImode, \
1238 (gen_rtx (PLUS, SImode, XEXP (X, 0), \
1239 gen_rtx (CONST_INT, VOIDmode, \
1240 high_int << 16)), 0),\
1241 gen_rtx (CONST_INT, VOIDmode, low_int)); \
1244 else if (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == REG \
1245 && GET_CODE (XEXP (X, 1)) != CONST_INT \
1246 && (MODE) != DImode && (MODE) != TImode) \
1248 (X) = gen_rtx (PLUS, SImode, XEXP (X, 0), \
1249 force_reg (SImode, force_operand (XEXP (X, 1), 0))); \
1254 /* Go to LABEL if ADDR (a legitimate address expression)
1255 has an effect that depends on the machine mode it is used for.
1257 On the RS/6000 this is true if the address is valid with a zero offset
1258 but not with an offset of four (this means it cannot be used as an
1259 address for DImode or DFmode) or is a pre-increment or decrement. Since
1260 we know it is valid, we just check for an address that is not valid with
1261 an offset of four. */
1263 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \
1264 { if (GET_CODE (ADDR) == PLUS \
1265 && LEGITIMATE_ADDRESS_INTEGER_P (XEXP (ADDR, 1), 0) \
1266 && ! LEGITIMATE_ADDRESS_INTEGER_P (XEXP (ADDR, 1), 4)) \
1268 if (GET_CODE (ADDR) == PRE_INC) \
1270 if (GET_CODE (ADDR) == PRE_DEC) \
1274 /* Define this if some processing needs to be done immediately before
1275 emitting code for an insn. */
1277 /* #define FINAL_PRESCAN_INSN(INSN,OPERANDS,NOPERANDS) */
1279 /* Specify the machine mode that this machine uses
1280 for the index in the tablejump instruction. */
1281 #define CASE_VECTOR_MODE SImode
1283 /* Define this if the tablejump instruction expects the table
1284 to contain offsets from the address of the table.
1285 Do not define this if the table should contain absolute addresses. */
1286 #define CASE_VECTOR_PC_RELATIVE
1288 /* Specify the tree operation to be used to convert reals to integers. */
1289 #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
1291 /* This is the kind of divide that is easiest to do in the general case. */
1292 #define EASY_DIV_EXPR TRUNC_DIV_EXPR
1294 /* Define this as 1 if `char' should by default be signed; else as 0. */
1295 #define DEFAULT_SIGNED_CHAR 0
1297 /* This flag, if defined, says the same insns that convert to a signed fixnum
1298 also convert validly to an unsigned one. */
1300 /* #define FIXUNS_TRUNC_LIKE_FIX_TRUNC */
1302 /* Max number of bytes we can move from memory to memory
1303 in one reasonably fast instruction. */
1306 /* Nonzero if access to memory by bytes is no faster than for words.
1307 Also non-zero if doing byte operations (specifically shifts) in registers
1309 #define SLOW_BYTE_ACCESS 1
1311 /* Define if operations between registers always perform the operation
1312 on the full register even if a narrower mode is specified. */
1313 #define WORD_REGISTER_OPERATIONS
1315 /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD
1316 will either zero-extend or sign-extend. The value of this macro should
1317 be the code that says which one of the two operations is implicitly
1318 done, NIL if none. */
1319 #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND
1321 /* Define if loading short immediate values into registers sign extends. */
1322 #define SHORT_IMMEDIATES_SIGN_EXTEND
1324 /* The RS/6000 uses the XCOFF format. */
1326 #define XCOFF_DEBUGGING_INFO
1328 /* Define if the object format being used is COFF or a superset. */
1329 #define OBJECT_FORMAT_COFF
1331 /* Define the magic numbers that we recognize as COFF. */
1333 #define MY_ISCOFF(magic) \
1334 ((magic) == U802WRMAGIC || (magic) == U802ROMAGIC || (magic) == U802TOCMAGIC)
1336 /* This is the only version of nm that collect2 can work with. */
1337 #define REAL_NM_FILE_NAME "/usr/ucb/nm"
1339 /* We don't have GAS for the RS/6000 yet, so don't write out special
1340 .stabs in cc1plus. */
1342 #define FASCIST_ASSEMBLER
1344 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
1345 is done just by pretending it is already truncated. */
1346 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1348 /* Specify the machine mode that pointers have.
1349 After generation of rtl, the compiler makes no further distinction
1350 between pointers and any other objects of this machine mode. */
1351 #define Pmode SImode
1353 /* Mode of a function address in a call instruction (for indexing purposes).
1355 Doesn't matter on RS/6000. */
1356 #define FUNCTION_MODE SImode
1358 /* Define this if addresses of constant functions
1359 shouldn't be put through pseudo regs where they can be cse'd.
1360 Desirable on machines where ordinary constants are expensive
1361 but a CALL with constant address is cheap. */
1362 #define NO_FUNCTION_CSE
1364 /* Define this to be nonzero if shift instructions ignore all but the low-order
1367 The sle and sre instructions which allow SHIFT_COUNT_TRUNCATED
1368 have been dropped from the PowerPC architecture. */
1370 #define SHIFT_COUNT_TRUNCATED TARGET_POWER ? 1 : 0
1372 /* Use atexit for static constructors/destructors, instead of defining
1373 our own exit function. */
1376 /* Compute the cost of computing a constant rtl expression RTX
1377 whose rtx-code is CODE. The body of this macro is a portion
1378 of a switch statement. If the code is computed here,
1379 return it with a return statement. Otherwise, break from the switch.
1381 On the RS/6000, if it is legal in the insn, it is free. So this
1382 always returns 0. */
1384 #define CONST_COSTS(RTX,CODE,OUTER_CODE) \
1389 case CONST_DOUBLE: \
1392 /* Provide the costs of a rtl expression. This is in the body of a
1395 #define RTX_COSTS(X,CODE,OUTER_CODE) \
1397 return (GET_CODE (XEXP (X, 1)) != CONST_INT \
1398 ? COSTS_N_INSNS (5) \
1399 : INTVAL (XEXP (X, 1)) >= -256 && INTVAL (XEXP (X, 1)) <= 255 \
1400 ? COSTS_N_INSNS (3) : COSTS_N_INSNS (4)); \
1403 if (GET_CODE (XEXP (X, 1)) == CONST_INT \
1404 && exact_log2 (INTVAL (XEXP (X, 1))) >= 0) \
1405 return COSTS_N_INSNS (2); \
1406 /* otherwise fall through to normal divide. */ \
1409 return COSTS_N_INSNS (19); \
1411 /* MEM should be slightly more expensive than (plus (reg) (const)) */ \
1414 /* Compute the cost of an address. This is meant to approximate the size
1415 and/or execution delay of an insn using that address. If the cost is
1416 approximated by the RTL complexity, including CONST_COSTS above, as
1417 is usually the case for CISC machines, this macro should not be defined.
1418 For aggressively RISCy machines, only one insn format is allowed, so
1419 this macro should be a constant. The value of this macro only matters
1420 for valid addresses.
1422 For the RS/6000, everything is cost 0. */
1424 #define ADDRESS_COST(RTX) 0
1426 /* Adjust the length of an INSN. LENGTH is the currently-computed length and
1427 should be adjusted to reflect any required changes. This macro is used when
1428 there is some systematic length adjustment required that would be difficult
1429 to express in the length attribute. */
1431 /* #define ADJUST_INSN_LENGTH(X,LENGTH) */
1433 /* Add any extra modes needed to represent the condition code.
1435 For the RS/6000, we need separate modes when unsigned (logical) comparisons
1436 are being done and we need a separate mode for floating-point. We also
1437 use a mode for the case when we are comparing the results of two
1440 #define EXTRA_CC_MODES CCUNSmode, CCFPmode, CCEQmode
1442 /* Define the names for the modes specified above. */
1443 #define EXTRA_CC_NAMES "CCUNS", "CCFP", "CCEQ"
1445 /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE,
1446 return the mode to be used for the comparison. For floating-point, CCFPmode
1447 should be used. CCUNSmode should be used for unsigned comparisons.
1448 CCEQmode should be used when we are doing an inequality comparison on
1449 the result of a comparison. CCmode should be used in all other cases. */
1451 #define SELECT_CC_MODE(OP,X,Y) \
1452 (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT ? CCFPmode \
1453 : (OP) == GTU || (OP) == LTU || (OP) == GEU || (OP) == LEU ? CCUNSmode \
1454 : (((OP) == EQ || (OP) == NE) && GET_RTX_CLASS (GET_CODE (X)) == '<' \
1455 ? CCEQmode : CCmode))
1457 /* Define the information needed to generate branch and scc insns. This is
1458 stored from the compare operation. Note that we can't use "rtx" here
1459 since it hasn't been defined! */
1461 extern struct rtx_def *rs6000_compare_op0, *rs6000_compare_op1;
1462 extern int rs6000_compare_fp_p;
1464 /* Set to non-zero by "fix" operation to indicate that itrunc and
1465 uitrunc must be defined. */
1467 extern int rs6000_trunc_used;
1469 /* Control the assembler format that we output. */
1471 /* Output at beginning of assembler file.
1473 Initialize the section names for the RS/6000 at this point.
1475 Specify filename to assembler.
1477 We want to go into the TOC section so at least one .toc will be emitted.
1478 Also, in order to output proper .bs/.es pairs, we need at least one static
1479 [RW] section emitted.
1481 We then switch back to text to force the gcc2_compiled. label and the space
1482 allocated after it (when profiling) into the text section.
1484 Finally, declare mcount when profiling to make the assembler happy. */
1486 #define ASM_FILE_START(FILE) \
1488 rs6000_gen_section_name (&xcoff_bss_section_name, \
1489 main_input_filename, ".bss_"); \
1490 rs6000_gen_section_name (&xcoff_private_data_section_name, \
1491 main_input_filename, ".rw_"); \
1492 rs6000_gen_section_name (&xcoff_read_only_section_name, \
1493 main_input_filename, ".ro_"); \
1495 output_file_directive (FILE, main_input_filename); \
1497 if (write_symbols != NO_DEBUG) \
1498 private_data_section (); \
1501 fprintf (FILE, "\t.extern .mcount\n"); \
1504 /* Output at end of assembler file.
1506 On the RS/6000, referencing data should automatically pull in text. */
1508 #define ASM_FILE_END(FILE) \
1511 fprintf (FILE, "_section_.text:\n"); \
1513 fprintf (FILE, "\t.long _section_.text\n"); \
1516 /* We define this to prevent the name mangler from putting dollar signs into
1519 #define NO_DOLLAR_IN_LABEL
1521 /* We define this to 0 so that gcc will never accept a dollar sign in a
1522 variable name. This is needed because the AIX assembler will not accept
1525 #define DOLLARS_IN_IDENTIFIERS 0
1527 /* Implicit library calls should use memcpy, not bcopy, etc. */
1529 #define TARGET_MEM_FUNCTIONS
1531 /* Define the extra sections we need. We define three: one is the read-only
1532 data section which is used for constants. This is a csect whose name is
1533 derived from the name of the input file. The second is for initialized
1534 global variables. This is a csect whose name is that of the variable.
1535 The third is the TOC. */
1537 #define EXTRA_SECTIONS \
1538 read_only_data, private_data, read_only_private_data, toc, bss
1540 /* Define the name of our readonly data section. */
1542 #define READONLY_DATA_SECTION read_only_data_section
1544 /* If we are referencing a function that is static or is known to be
1545 in this file, make the SYMBOL_REF special. We can use this to indicate
1546 that we can branch to this function without emitting a no-op after the
1549 #define ENCODE_SECTION_INFO(DECL) \
1550 if (TREE_CODE (DECL) == FUNCTION_DECL \
1551 && (TREE_ASM_WRITTEN (DECL) || ! TREE_PUBLIC (DECL))) \
1552 SYMBOL_REF_FLAG (XEXP (DECL_RTL (DECL), 0)) = 1;
1554 /* Indicate that jump tables go in the text section. */
1556 #define JUMP_TABLES_IN_TEXT_SECTION
1558 /* Define the routines to implement these extra sections. */
1560 #define EXTRA_SECTION_FUNCTIONS \
1563 read_only_data_section () \
1565 if (in_section != read_only_data) \
1567 fprintf (asm_out_file, ".csect %s[RO]\n", \
1568 xcoff_read_only_section_name); \
1569 in_section = read_only_data; \
1574 private_data_section () \
1576 if (in_section != private_data) \
1578 fprintf (asm_out_file, ".csect %s[RW]\n", \
1579 xcoff_private_data_section_name); \
1581 in_section = private_data; \
1586 read_only_private_data_section () \
1588 if (in_section != read_only_private_data) \
1590 fprintf (asm_out_file, ".csect %s[RO]\n", \
1591 xcoff_private_data_section_name); \
1592 in_section = read_only_private_data; \
1599 if (TARGET_MINIMAL_TOC) \
1601 static int toc_initialized = 0; \
1603 /* toc_section is always called at least once from ASM_FILE_START, \
1604 so this is guaranteed to always be defined once and only once \
1606 if (! toc_initialized) \
1608 fprintf (asm_out_file, ".toc\nLCTOC..0:\n"); \
1609 fprintf (asm_out_file, "\t.tc toc_table[TC],toc_table[RW]\n"); \
1610 toc_initialized = 1; \
1613 if (in_section != toc) \
1614 fprintf (asm_out_file, ".csect toc_table[RW]\n"); \
1618 if (in_section != toc) \
1619 fprintf (asm_out_file, ".toc\n"); \
1624 /* This macro produces the initial definition of a function name.
1625 On the RS/6000, we need to place an extra '.' in the function name and
1626 output the function descriptor.
1628 The csect for the function will have already been created by the
1629 `text_section' call previously done. We do have to go back to that
1632 /* ??? What do the 16 and 044 in the .function line really mean? */
1634 #define ASM_DECLARE_FUNCTION_NAME(FILE,NAME,DECL) \
1635 { if (TREE_PUBLIC (DECL)) \
1637 fprintf (FILE, "\t.globl ."); \
1638 RS6000_OUTPUT_BASENAME (FILE, NAME); \
1639 fprintf (FILE, "\n"); \
1641 else if (write_symbols == XCOFF_DEBUG) \
1643 fprintf (FILE, "\t.lglobl ."); \
1644 RS6000_OUTPUT_BASENAME (FILE, NAME); \
1645 fprintf (FILE, "\n"); \
1647 fprintf (FILE, ".csect "); \
1648 RS6000_OUTPUT_BASENAME (FILE, NAME); \
1649 fprintf (FILE, "[DS]\n"); \
1650 RS6000_OUTPUT_BASENAME (FILE, NAME); \
1651 fprintf (FILE, ":\n"); \
1652 fprintf (FILE, "\t.long ."); \
1653 RS6000_OUTPUT_BASENAME (FILE, NAME); \
1654 fprintf (FILE, ", TOC[tc0], 0\n"); \
1655 fprintf (FILE, ".csect .text[PR]\n."); \
1656 RS6000_OUTPUT_BASENAME (FILE, NAME); \
1657 fprintf (FILE, ":\n"); \
1658 if (write_symbols == XCOFF_DEBUG) \
1659 xcoffout_declare_function (FILE, DECL, NAME); \
1662 /* Return non-zero if this entry is to be written into the constant pool
1663 in a special way. We do so if this is a SYMBOL_REF, LABEL_REF or a CONST
1664 containing one of them. If -mfp-in-toc (the default), we also do
1665 this for floating-point constants. We actually can only do this
1666 if the FP formats of the target and host machines are the same, but
1667 we can't check that since not every file that uses
1668 GO_IF_LEGITIMATE_ADDRESS_P includes real.h. */
1670 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X) \
1671 (GET_CODE (X) == SYMBOL_REF \
1672 || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \
1673 && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF) \
1674 || GET_CODE (X) == LABEL_REF \
1675 || (! (TARGET_NO_FP_IN_TOC && ! TARGET_MINIMAL_TOC) \
1676 && GET_CODE (X) == CONST_DOUBLE \
1677 && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \
1678 && BITS_PER_WORD == HOST_BITS_PER_INT))
1680 /* Select section for constant in constant pool.
1682 On RS/6000, all constants are in the private read-only data area.
1683 However, if this is being placed in the TOC it must be output as a
1686 #define SELECT_RTX_SECTION(MODE, X) \
1687 { if (ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (X)) \
1690 read_only_private_data_section (); \
1693 /* Macro to output a special constant pool entry. Go to WIN if we output
1694 it. Otherwise, it is written the usual way.
1696 On the RS/6000, toc entries are handled this way. */
1698 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE, X, MODE, ALIGN, LABELNO, WIN) \
1699 { if (ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (X)) \
1701 output_toc (FILE, X, LABELNO); \
1706 /* Select the section for an initialized data object.
1708 On the RS/6000, we have a special section for all variables except those
1711 #define SELECT_SECTION(EXP,RELOC) \
1713 if ((TREE_READONLY (EXP) \
1714 || (TREE_CODE (EXP) == STRING_CST \
1715 && !flag_writable_strings)) \
1716 && ! TREE_THIS_VOLATILE (EXP) \
1719 if (TREE_PUBLIC (EXP)) \
1720 read_only_data_section (); \
1722 read_only_private_data_section (); \
1726 if (TREE_PUBLIC (EXP)) \
1729 private_data_section (); \
1733 /* This outputs NAME to FILE up to the first null or '['. */
1735 #define RS6000_OUTPUT_BASENAME(FILE, NAME) \
1736 if ((NAME)[0] == '*') \
1737 assemble_name (FILE, NAME); \
1741 for (_p = (NAME); *_p && *_p != '['; _p++) \
1742 fputc (*_p, FILE); \
1745 /* Output something to declare an external symbol to the assembler. Most
1746 assemblers don't need this.
1748 If we haven't already, add "[RW]" (or "[DS]" for a function) to the
1749 name. Normally we write this out along with the name. In the few cases
1750 where we can't, it gets stripped off. */
1752 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
1753 { rtx _symref = XEXP (DECL_RTL (DECL), 0); \
1754 if ((TREE_CODE (DECL) == VAR_DECL \
1755 || TREE_CODE (DECL) == FUNCTION_DECL) \
1756 && (NAME)[0] != '*' \
1757 && (NAME)[strlen (NAME) - 1] != ']') \
1759 char *_name = (char *) permalloc (strlen (XSTR (_symref, 0)) + 5); \
1760 strcpy (_name, XSTR (_symref, 0)); \
1761 strcat (_name, TREE_CODE (DECL) == FUNCTION_DECL ? "[DS]" : "[RW]"); \
1762 XSTR (_symref, 0) = _name; \
1764 fprintf (FILE, "\t.extern "); \
1765 assemble_name (FILE, XSTR (_symref, 0)); \
1766 if (TREE_CODE (DECL) == FUNCTION_DECL) \
1768 fprintf (FILE, "\n\t.extern ."); \
1769 RS6000_OUTPUT_BASENAME (FILE, XSTR (_symref, 0)); \
1771 fprintf (FILE, "\n"); \
1774 /* Similar, but for libcall. We only have to worry about the function name,
1775 not that of the descriptor. */
1777 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
1778 { fprintf (FILE, "\t.extern ."); \
1779 assemble_name (FILE, XSTR (FUN, 0)); \
1780 fprintf (FILE, "\n"); \
1783 /* Output to assembler file text saying following lines
1784 may contain character constants, extra white space, comments, etc. */
1786 #define ASM_APP_ON ""
1788 /* Output to assembler file text saying following lines
1789 no longer contain unusual constructs. */
1791 #define ASM_APP_OFF ""
1793 /* Output before instructions. */
1795 #define TEXT_SECTION_ASM_OP ".csect .text[PR]"
1797 /* Output before writable data. */
1799 #define DATA_SECTION_ASM_OP ".csect .data[RW]"
1801 /* How to refer to registers in assembler output.
1802 This sequence is indexed by compiler's hard-register-number (see above). */
1804 #define REGISTER_NAMES \
1805 {"0", "1", "2", "3", "4", "5", "6", "7", \
1806 "8", "9", "10", "11", "12", "13", "14", "15", \
1807 "16", "17", "18", "19", "20", "21", "22", "23", \
1808 "24", "25", "26", "27", "28", "29", "30", "31", \
1809 "0", "1", "2", "3", "4", "5", "6", "7", \
1810 "8", "9", "10", "11", "12", "13", "14", "15", \
1811 "16", "17", "18", "19", "20", "21", "22", "23", \
1812 "24", "25", "26", "27", "28", "29", "30", "31", \
1813 "mq", "lr", "ctr", "ap", \
1814 "0", "1", "2", "3", "4", "5", "6", "7" }
1816 /* Table of additional register names to use in user input. */
1818 #define ADDITIONAL_REGISTER_NAMES \
1819 {"r0", 0, "r1", 1, "r2", 2, "r3", 3, \
1820 "r4", 4, "r5", 5, "r6", 6, "r7", 7, \
1821 "r8", 8, "r9", 9, "r10", 10, "r11", 11, \
1822 "r12", 12, "r13", 13, "r14", 14, "r15", 15, \
1823 "r16", 16, "r17", 17, "r18", 18, "r19", 19, \
1824 "r20", 20, "r21", 21, "r22", 22, "r23", 23, \
1825 "r24", 24, "r25", 25, "r26", 26, "r27", 27, \
1826 "r28", 28, "r29", 29, "r30", 30, "r31", 31, \
1827 "fr0", 32, "fr1", 33, "fr2", 34, "fr3", 35, \
1828 "fr4", 36, "fr5", 37, "fr6", 38, "fr7", 39, \
1829 "fr8", 40, "fr9", 41, "fr10", 42, "fr11", 43, \
1830 "fr12", 44, "fr13", 45, "fr14", 46, "fr15", 47, \
1831 "fr16", 48, "fr17", 49, "fr18", 50, "fr19", 51, \
1832 "fr20", 52, "fr21", 53, "fr22", 54, "fr23", 55, \
1833 "fr24", 56, "fr25", 57, "fr26", 58, "fr27", 59, \
1834 "fr28", 60, "fr29", 61, "fr30", 62, "fr31", 63, \
1835 /* no additional names for: mq, lr, ctr, ap */ \
1836 "cr0", 68, "cr1", 69, "cr2", 70, "cr3", 71, \
1837 "cr4", 72, "cr5", 73, "cr6", 74, "cr7", 75, \
1840 /* How to renumber registers for dbx and gdb. */
1842 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
1844 /* Text to write out after a CALL that may be replaced by glue code by
1845 the loader. This depends on the AIX version. */
1846 #define RS6000_CALL_GLUE "cror 31,31,31"
1848 /* This is how to output the definition of a user-level label named NAME,
1849 such as the label on a static function or variable NAME. */
1851 #define ASM_OUTPUT_LABEL(FILE,NAME) \
1852 do { RS6000_OUTPUT_BASENAME (FILE, NAME); fputs (":\n", FILE); } while (0)
1854 /* This is how to output a command to make the user-level label named NAME
1855 defined for reference from other files. */
1857 #define ASM_GLOBALIZE_LABEL(FILE,NAME) \
1858 do { fputs ("\t.globl ", FILE); \
1859 RS6000_OUTPUT_BASENAME (FILE, NAME); fputs ("\n", FILE);} while (0)
1861 /* This is how to output a reference to a user-level label named NAME.
1862 `assemble_name' uses this. */
1864 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
1865 fprintf (FILE, NAME)
1867 /* This is how to output an internal numbered label where
1868 PREFIX is the class of label and NUM is the number within the class. */
1870 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM) \
1871 fprintf (FILE, "%s..%d:\n", PREFIX, NUM)
1873 /* This is how to output a label for a jump table. Arguments are the same as
1874 for ASM_OUTPUT_INTERNAL_LABEL, except the insn for the jump table is
1877 #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN) \
1878 { ASM_OUTPUT_ALIGN (FILE, 2); ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); }
1880 /* This is how to store into the string LABEL
1881 the symbol_ref name of an internal numbered label where
1882 PREFIX is the class of label and NUM is the number within the class.
1883 This is suitable for output with `assemble_name'. */
1885 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
1886 sprintf (LABEL, "%s..%d", PREFIX, NUM)
1888 /* This is how to output an assembler line defining a `double' constant. */
1890 #define ASM_OUTPUT_DOUBLE(FILE, VALUE) \
1892 if (REAL_VALUE_ISINF (VALUE) \
1893 || REAL_VALUE_ISNAN (VALUE) \
1894 || REAL_VALUE_MINUS_ZERO (VALUE)) \
1897 REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), t); \
1898 fprintf (FILE, "\t.long 0x%lx\n\t.long 0x%lx\n", \
1899 t[0] & 0xffffffff, t[1] & 0xffffffff); \
1904 REAL_VALUE_TO_DECIMAL (VALUE, "%.20e", str); \
1905 fprintf (FILE, "\t.double 0d%s\n", str); \
1909 /* This is how to output an assembler line defining a `float' constant. */
1911 #define ASM_OUTPUT_FLOAT(FILE, VALUE) \
1913 if (REAL_VALUE_ISINF (VALUE) \
1914 || REAL_VALUE_ISNAN (VALUE) \
1915 || REAL_VALUE_MINUS_ZERO (VALUE)) \
1918 REAL_VALUE_TO_TARGET_SINGLE ((VALUE), t); \
1919 fprintf (FILE, "\t.long 0x%lx\n", t & 0xffffffff); \
1924 REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", str); \
1925 fprintf (FILE, "\t.float 0d%s\n", str); \
1929 /* This is how to output an assembler line defining an `int' constant. */
1931 #define ASM_OUTPUT_INT(FILE,VALUE) \
1932 ( fprintf (FILE, "\t.long "), \
1933 output_addr_const (FILE, (VALUE)), \
1934 fprintf (FILE, "\n"))
1936 /* Likewise for `char' and `short' constants. */
1938 #define ASM_OUTPUT_SHORT(FILE,VALUE) \
1939 ( fprintf (FILE, "\t.short "), \
1940 output_addr_const (FILE, (VALUE)), \
1941 fprintf (FILE, "\n"))
1943 #define ASM_OUTPUT_CHAR(FILE,VALUE) \
1944 ( fprintf (FILE, "\t.byte "), \
1945 output_addr_const (FILE, (VALUE)), \
1946 fprintf (FILE, "\n"))
1948 /* This is how to output an assembler line for a numeric constant byte. */
1950 #define ASM_OUTPUT_BYTE(FILE,VALUE) \
1951 fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
1953 /* This is how to output an assembler line to define N characters starting
1956 #define ASM_OUTPUT_ASCII(FILE, P, N) output_ascii ((FILE), (P), (N))
1958 /* This is how to output code to push a register on the stack.
1959 It need not be very fast code. */
1961 #define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \
1962 asm_fprintf (FILE, "\{tstu|stwu} %s,-4(r1)\n", reg_names[REGNO]);
1964 /* This is how to output an insn to pop a register from the stack.
1965 It need not be very fast code. */
1967 #define ASM_OUTPUT_REG_POP(FILE,REGNO) \
1968 asm_fprintf (FILE, "\t{l|lwz} %s,0(r1)\n\t{ai|addic} r1,r1,4\n", \
1971 /* This is how to output an element of a case-vector that is absolute.
1972 (RS/6000 does not use such vectors, but we must define this macro
1975 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
1976 fprintf (FILE, "\t.long L..%d\n", VALUE)
1978 /* This is how to output an element of a case-vector that is relative. */
1980 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL) \
1981 fprintf (FILE, "\t.long L..%d-L..%d\n", VALUE, REL)
1983 /* This is how to output an assembler line
1984 that says to advance the location counter
1985 to a multiple of 2**LOG bytes. */
1987 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
1989 fprintf (FILE, "\t.align %d\n", (LOG))
1991 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
1992 fprintf (FILE, "\t.space %d\n", (SIZE))
1994 /* This says how to output an assembler line
1995 to define a global common symbol. */
1997 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
1998 do { fputs (".comm ", (FILE)); \
1999 RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
2000 fprintf ((FILE), ",%d\n", (SIZE)); } while (0)
2002 /* This says how to output an assembler line
2003 to define a local common symbol. */
2005 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE,ROUNDED) \
2006 do { fputs (".lcomm ", (FILE)); \
2007 RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
2008 fprintf ((FILE), ",%d,%s\n", (SIZE), xcoff_bss_section_name); \
2011 /* Store in OUTPUT a string (made with alloca) containing
2012 an assembler-name for a local static variable named NAME.
2013 LABELNO is an integer which is different for each call. */
2015 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
2016 ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \
2017 sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
2019 /* Define the parentheses used to group arithmetic operations
2020 in assembler code. */
2022 #define ASM_OPEN_PAREN "("
2023 #define ASM_CLOSE_PAREN ")"
2025 /* Define results of standard character escape sequences. */
2026 #define TARGET_BELL 007
2027 #define TARGET_BS 010
2028 #define TARGET_TAB 011
2029 #define TARGET_NEWLINE 012
2030 #define TARGET_VT 013
2031 #define TARGET_FF 014
2032 #define TARGET_CR 015
2034 /* Print operand X (an rtx) in assembler syntax to file FILE.
2035 CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
2036 For `%' followed by punctuation, CODE is the punctuation and X is null. */
2038 #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE)
2040 /* Define which CODE values are valid. */
2042 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) ((CODE) == '.')
2044 /* Print a memory address as an operand to reference that memory location. */
2046 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR)
2048 /* Define the codes that are matched by predicates in rs6000.c. */
2050 #define PREDICATE_CODES \
2051 {"short_cint_operand", {CONST_INT}}, \
2052 {"u_short_cint_operand", {CONST_INT}}, \
2053 {"non_short_cint_operand", {CONST_INT}}, \
2054 {"gpc_reg_operand", {SUBREG, REG}}, \
2055 {"cc_reg_operand", {SUBREG, REG}}, \
2056 {"reg_or_short_operand", {SUBREG, REG, CONST_INT}}, \
2057 {"reg_or_neg_short_operand", {SUBREG, REG, CONST_INT}}, \
2058 {"reg_or_u_short_operand", {SUBREG, REG, CONST_INT}}, \
2059 {"reg_or_cint_operand", {SUBREG, REG, CONST_INT}}, \
2060 {"easy_fp_constant", {CONST_DOUBLE}}, \
2061 {"reg_or_mem_operand", {SUBREG, MEM, REG}}, \
2062 {"fp_reg_or_mem_operand", {SUBREG, MEM, REG}}, \
2063 {"mem_or_easy_const_operand", {SUBREG, MEM, CONST_DOUBLE}}, \
2064 {"add_operand", {SUBREG, REG, CONST_INT}}, \
2065 {"non_add_cint_operand", {CONST_INT}}, \
2066 {"and_operand", {SUBREG, REG, CONST_INT}}, \
2067 {"non_and_cint_operand", {CONST_INT}}, \
2068 {"logical_operand", {SUBREG, REG, CONST_INT}}, \
2069 {"non_logical_cint_operand", {CONST_INT}}, \
2070 {"mask_operand", {CONST_INT}}, \
2071 {"call_operand", {SYMBOL_REF, REG}}, \
2072 {"current_file_function_operand", {SYMBOL_REF}}, \
2073 {"input_operand", {SUBREG, MEM, REG, CONST_INT}}, \
2074 {"load_multiple_operation", {PARALLEL}}, \
2075 {"store_multiple_operation", {PARALLEL}}, \
2076 {"branch_comparison_operator", {EQ, NE, LE, LT, GE, \
2077 GT, LEU, LTU, GEU, GTU}}, \
2078 {"scc_comparison_operator", {EQ, NE, LE, LT, GE, \
2079 GT, LEU, LTU, GEU, GTU}},
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