1 /* Definitions of target machine for GNU compiler. Tahoe version.
2 Copyright (C) 1989, 93, 94, 95, 96, 1998, 1999 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
22 * Original port made at the University of Buffalo by Devon Bowen,
23 * Dale Wiles and Kevin Zachmann.
25 * HCX/UX version by Piet van Oostrum (piet@cs.ruu.nl)
27 * Performance hacking by Michael Tiemann (tiemann@cygnus.com)
30 /* define this for the HCX/UX version */
35 * Run-time Target Specification
39 /* no predefines, see Makefile and hcx-universe.c */
40 /* have cc1 print that this is the hcx version */
41 #define TARGET_VERSION printf (" (hcx)");
43 /* we want "tahoe" and "unix" defined for all future compilations */
44 #define CPP_PREDEFINES "-Dtahoe -Dunix -Asystem(unix) -Acpu(tahoe) -Amachine(tahoe)"
45 /* have cc1 print that this is the tahoe version */
46 #define TARGET_VERSION printf (" (tahoe)");
49 /* this is required in all tm files to hold flags */
51 extern int target_flags;
53 /* Zero if it is safe to output .dfloat and .float pseudos. */
54 #define TARGET_HEX_FLOAT (target_flags & 1)
56 #define TARGET_DEFAULT 1
58 #define TARGET_SWITCHES \
60 {"no-hex-float", -1}, \
61 { "", TARGET_DEFAULT} }
68 /* This symbol was previously not mentioned, so apparently the tahoe
69 is little-endian for bits, or else doesn't care. */
70 #define BITS_BIG_ENDIAN 0
72 /* tahoe uses a big endian byte order */
74 #define BYTES_BIG_ENDIAN 1
76 /* tahoe uses a big endian word order */
78 #define WORDS_BIG_ENDIAN 1
80 /* standard byte size is usable on tahoe */
82 #define BITS_PER_UNIT 8
84 /* longs on the tahoe are 4 byte groups */
86 #define BITS_PER_WORD 32
88 /* from the last two params we get 4 bytes per word */
90 #define UNITS_PER_WORD 4
92 /* addresses are 32 bits (one word) */
94 #define POINTER_SIZE 32
96 /* all parameters line up on 32 boundaries */
98 #define PARM_BOUNDARY 32
100 /* stack should line up on 32 boundaries */
102 #define STACK_BOUNDARY 32
104 /* line functions up on 32 bits */
106 #define FUNCTION_BOUNDARY 32
108 /* the biggest alignment the tahoe needs in 32 bits */
110 #define BIGGEST_ALIGNMENT 32
112 /* we have to align after an 'int : 0' in a structure */
114 #define EMPTY_FIELD_BOUNDARY 32
117 /* structures must be made of full words */
119 #define STRUCTURE_SIZE_BOUNDARY 32
121 /* structures must be made of full bytes */
123 #define STRUCTURE_SIZE_BOUNDARY 8
126 /* tahoe is picky about data alignment */
128 #define STRICT_ALIGNMENT 1
130 /* keep things standard with pcc */
132 #define PCC_BITFIELD_TYPE_MATTERS 1
134 /* this section is borrowed from the vax version since the */
135 /* formats are the same in both of the architectures */
137 #define CHECK_FLOAT_VALUE(MODE, D, OVERFLOW) \
139 (D) = 1.7014117331926443e+38; \
140 else if ((MODE) == SFmode) \
142 if ((D) > 1.7014117331926443e+38) \
143 (OVERFLOW) = 1, (D) = 1.7014117331926443e+38; \
144 else if ((D) < -1.7014117331926443e+38) \
145 (OVERFLOW) = 1, (D) = -1.7014117331926443e+38; \
146 else if (((D) > 0) && ((D) < 2.9387358770557188e-39)) \
147 (OVERFLOW) = 1, (D) = 0.0; \
148 else if (((D) < 0) && ((D) > -2.9387358770557188e-39)) \
149 (OVERFLOW) = 1, (D) = 0.0; \
157 /* define 15 general regs plus one for the floating point reg (FPP) */
159 #define FIRST_PSEUDO_REGISTER 17
161 /* let the compiler know what the fp, sp and pc are */
163 #define FIXED_REGISTERS {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0}
165 /* lots of regs aren't guaranteed to return from a call. The FPP reg */
166 /* must be included in these since it can't be saved by the reg mask */
168 #define CALL_USED_REGISTERS {1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1}
170 /* A single fp reg can handle any type of float.
171 CPU regs hold just 32 bits. */
173 #define HARD_REGNO_NREGS(REGNO, MODE) \
174 (REGNO != 16 ? ((GET_MODE_SIZE(MODE)+UNITS_PER_WORD-1) / UNITS_PER_WORD) \
175 : GET_MODE_NUNITS ((MODE)))
177 /* any mode greater than 4 bytes (doubles) can only go in an even regs */
178 /* and the FPP can only hold SFmode and DFmode */
180 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
182 ? (GET_MODE_UNIT_SIZE (MODE) <= 4 ? 1 : (REGNO % 2 - 1)) \
183 : ((MODE) == SFmode || (MODE) == DFmode \
184 || (MODE) == SCmode || (MODE) == DCmode))
186 /* if mode1 or mode2, but not both, are doubles then modes cannot be tied */
188 #define MODES_TIEABLE_P(MODE1, MODE2) \
189 (((MODE1) == DFmode || (MODE1) == DCmode) \
190 == ((MODE2) == DFmode || (MODE2) == DCmode))
192 /* return nonzero if register variable of mode MODE is not
193 a priori a bad idea. Used only if defined. */
194 #define MODE_OK_FOR_USERVAR(MODE) \
197 /* the program counter is reg 15 */
201 /* the stack pointer is reg 14 */
203 #define STACK_POINTER_REGNUM 14
205 /* the frame pointer is reg 13 */
207 #define FRAME_POINTER_REGNUM 13
209 /* tahoe does require an fp */
211 #define FRAME_POINTER_REQUIRED 1
213 /* since tahoe doesn't have a argument pointer, make it the fp */
215 #define ARG_POINTER_REGNUM 13
217 /* this isn't currently used since C doesn't support this feature */
219 #define STATIC_CHAIN_REGNUM 0
221 /* we'll use reg 1 for structure passing cause the destination */
222 /* of the eventual movblk requires it to be there anyway. */
224 #define STRUCT_VALUE_REGNUM 1
231 /* tahoe has two types of regs. GENERAL_REGS are all the regs up */
232 /* to number 15. FPP_REG is the special floating point processor */
233 /* register class (only one reg). */
235 enum reg_class {NO_REGS,GENERAL_REGS,FPP_REG,ALL_REGS,LIM_REG_CLASSES};
237 /* defines the number of reg classes. */
239 #define N_REG_CLASSES (int) LIM_REG_CLASSES
241 /* this defines what the classes are officially named for debugging */
243 #define REG_CLASS_NAMES \
244 {"NO_REGS","GENERAL_REGS","FPP_REG","ALL_REGS"}
246 /* set general regs to be the first 16 regs and the fpp reg to be 17th */
248 #define REG_CLASS_CONTENTS {0,0xffff,0x10000,0x1ffff}
250 /* register class for the fpp reg is FPP_REG, all others are GENERAL_REGS */
252 #define REGNO_REG_CLASS(REGNO) (REGNO == 16 ? FPP_REG : GENERAL_REGS)
254 /* only general registers can be used as a base reg */
256 #define BASE_REG_CLASS GENERAL_REGS
258 /* only general registers can be used to index */
260 #define INDEX_REG_CLASS GENERAL_REGS
262 /* 'a' as a constraint in the md file means the FFP_REG class */
264 #define REG_CLASS_FROM_LETTER(C) (C == 'a' ? FPP_REG : NO_REGS)
266 /* any general reg but the fpp can be a base reg */
268 #define REGNO_OK_FOR_BASE_P(regno) \
269 ((regno) < FIRST_PSEUDO_REGISTER - 1 || reg_renumber[regno] >= 0)
271 /* any general reg except the pc and fpp can be an index reg */
273 #define REGNO_OK_FOR_INDEX_P(regno) \
274 ((regno) < FIRST_PSEUDO_REGISTER - 2 || reg_renumber[regno] >= 0)
276 /* if your loading a floating point constant, it can't be done */
277 /* through a register. Force it to be a memory constant. */
279 #define PREFERRED_RELOAD_CLASS(X,CLASS) \
280 ((GET_CODE (X) == CONST_DOUBLE) ? NO_REGS : CLASS)
282 /* for the fpp reg, all modes fit; for any others, you need two for doubles */
284 #define CLASS_MAX_NREGS(CLASS, MODE) \
285 (CLASS != FPP_REG ? ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) : 1)
287 /* we don't define any special constant sizes so all should fail */
289 #define CONST_OK_FOR_LETTER_P(VALUE, C) 0
291 /* we don't define any special double sizes so all should fail */
293 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) 0
297 * Describing Stack Layout
300 /* tahoe stack grows from high to low memory */
302 #define STACK_GROWS_DOWNWARD
304 /* Define this if longjmp restores from saved registers
305 rather than from what setjmp saved. */
306 #define LONGJMP_RESTORE_FROM_STACK
308 /* tahoe call frames grow from high to low memory on the stack */
310 #define FRAME_GROWS_DOWNWARD
312 /* the tahoe fp points to the *top* of the frame instead of the */
313 /* bottom, so we have to make this offset a constant large enough */
314 /* to jump over the biggest frame possible. */
316 #define STARTING_FRAME_OFFSET -52
318 /* tahoe always pushes 4 bytes unless it's a double in which case */
319 /* it pushes a full 8 bytes. */
321 #define PUSH_ROUNDING(BYTES) (BYTES <= 4 ? 4 : 8)
323 /* the first parameter in a function is at the fp + 4 */
325 #define FIRST_PARM_OFFSET(FNDECL) 4
327 /* the tahoe return function takes care of everything on the stack */
329 #define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) (SIZE)
331 /* function values for all types are returned in register 0 */
333 #define FUNCTION_VALUE(VALTYPE, FUNC) \
334 gen_rtx_REG (TYPE_MODE (VALTYPE), 0)
336 /* library routines also return things in reg 0 */
338 #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, 0)
340 /* Tahoe doesn't return structures in a reentrant way */
342 #define PCC_STATIC_STRUCT_RETURN
344 /* we only return values from a function in reg 0 */
346 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
348 /* we never pass args through a register */
350 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) 0
352 /* int is fine to hold the argument summary in FUNCTION_ARG */
354 #define CUMULATIVE_ARGS int
356 /* we just set CUM to 0 before the FUNCTION_ARG call. No matter what */
357 /* we make it, FUNCTION_ARG will return 0 anyway */
359 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT) \
362 /* all modes push their size rounded to the nearest word boundary */
363 /* except block which is the size of the block rounded up */
365 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
366 ((CUM) += ((MODE) != BLKmode \
367 ? (GET_MODE_SIZE (MODE) + 3) & ~3 \
368 : (int_size_in_bytes (TYPE) + 3) & ~3))
370 /* this is always false since we never pass params in regs */
372 #define FUNCTION_ARG_REGNO_P(N) 0
374 /* this code calculates the register entry mask and sets up */
375 /* the stack pointer for the function. The stack is set down */
376 /* far enough from the fp to jump over any push regs and local */
377 /* vars. This is a problem since the tahoe has the fp pointing */
378 /* to the top of the frame and the compiler must know the off- */
379 /* set off the fp to the local vars. */
381 #define FUNCTION_PROLOGUE(FILE, SIZE) \
382 { register int regno; \
383 register int mask = 0; \
384 extern char call_used_regs[]; \
385 for (regno = 0; regno < FIRST_PSEUDO_REGISTER-1; regno++) \
386 if (regs_ever_live[regno] && !call_used_regs[regno]) \
387 mask |= 1 << regno; \
388 fprintf (FILE, "\t.word 0x%x\n", mask); \
389 if (SIZE != 0) fprintf (FILE, "\tsubl3 $%d,fp,sp\n", (SIZE) - STARTING_FRAME_OFFSET); }
391 /* Zero out global variable in case it was used in this function. */
392 #define FUNCTION_EPILOGUE(FILE, SIZE) \
393 { extern rtx tahoe_reg_conversion_loc; \
394 tahoe_reg_conversion_loc = 0; \
399 /* to call the profiler, the address of the counter var is placed */
400 /* on the stack and then passed into mcount this way */
402 #define FUNCTION_PROFILER(FILE, LABELNO) \
403 fprintf (FILE, "\tpushal LP%d\n\tcallf $8,mcount\n", (LABELNO));
407 /* to call the profiler, push the variable value onto the stack */
408 /* and call mcount like a regular function. */
410 #define FUNCTION_PROFILER(FILE, LABELNO) \
411 fprintf (FILE, "\tpushl $LP%d\n\tcallf $8,mcount\n", (LABELNO));
415 /* all stack handling at the end of a function is handled by the */
416 /* return command. */
418 #define EXIT_IGNORE_STACK 1
421 * Library Subroutine Names
424 /* udiv is a valid C library routine in libc.a, so we call that */
426 #define UDIVSI3_LIBCALL "*udiv"
428 /* urem is a valid C library routine in libc.a, so we call that */
429 /* but not so on hcx/ux */
432 #undef UMODSI3_LIBCALL
434 #define UMODSI3_LIBCALL "*urem"
442 /* constant addresses can be treated exactly the same as normal constants */
444 #define CONSTANT_ADDRESS_P(X) \
445 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
446 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST \
447 || GET_CODE (X) == HIGH)
449 /* we can have as many as two regs in any given address */
451 #define MAX_REGS_PER_ADDRESS 2
453 /* The following is all the code for GO_IF_LEGITIMATE_ADDRESS */
454 /* most of this taken directly from the vax tm file since the */
455 /* tahoe and vax addressing modes are nearly identical. */
457 /* Is x an indirectable address? */
459 #define INDIRECTABLE_ADDRESS_P(X) \
460 (CONSTANT_ADDRESS_P (X) \
461 || (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X)) \
462 || (GET_CODE (X) == PLUS \
463 && GET_CODE (XEXP (X, 0)) == REG \
464 && REG_OK_FOR_BASE_P (XEXP (X, 0)) \
465 && CONSTANT_ADDRESS_P (XEXP (X, 1))))
467 /* If x is a non-indexed-address, go to ADDR. */
469 #define GO_IF_NONINDEXED_ADDRESS(X, ADDR) \
470 { register rtx xfoob = (X); \
471 if (GET_CODE (xfoob) == REG) goto ADDR; \
472 if (INDIRECTABLE_ADDRESS_P (xfoob)) goto ADDR; \
473 xfoob = XEXP (X, 0); \
474 if (GET_CODE (X) == MEM && INDIRECTABLE_ADDRESS_P (xfoob)) \
476 if ((GET_CODE (X) == PRE_DEC || GET_CODE (X) == POST_INC) \
477 && GET_CODE (xfoob) == REG && REGNO (xfoob) == 14) \
480 /* Is PROD an index term in mode MODE. */
482 #define INDEX_TERM_P(PROD, MODE) \
483 (GET_MODE_SIZE (MODE) == 1 \
484 ? (GET_CODE (PROD) == REG && REG_OK_FOR_BASE_P (PROD)) \
485 : (GET_CODE (PROD) == MULT \
487 (xfoo0 = XEXP (PROD, 0), xfoo1 = XEXP (PROD, 1), \
488 ((GET_CODE (xfoo0) == CONST_INT \
489 && INTVAL (xfoo0) == GET_MODE_SIZE (MODE) \
490 && GET_CODE (xfoo1) == REG \
491 && REG_OK_FOR_INDEX_P (xfoo1)) \
493 (GET_CODE (xfoo1) == CONST_INT \
494 && INTVAL (xfoo1) == GET_MODE_SIZE (MODE) \
495 && GET_CODE (xfoo0) == REG \
496 && REG_OK_FOR_INDEX_P (xfoo0))))))
498 /* Is the addition to the index a reg? */
500 #define GO_IF_REG_PLUS_INDEX(X, MODE, ADDR) \
501 { register rtx xfooa; \
502 if (GET_CODE (X) == PLUS) \
503 { if (GET_CODE (XEXP (X, 0)) == REG \
504 && REG_OK_FOR_BASE_P (XEXP (X, 0)) \
505 && (xfooa = XEXP (X, 1), \
506 INDEX_TERM_P (xfooa, MODE))) \
508 if (GET_CODE (XEXP (X, 1)) == REG \
509 && REG_OK_FOR_BASE_P (XEXP (X, 1)) \
510 && (xfooa = XEXP (X, 0), \
511 INDEX_TERM_P (xfooa, MODE))) \
514 /* Is the rtx X a valid memory address for operand of mode MODE? */
515 /* If it is, go to ADDR */
517 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
518 { register rtx xfoo, xfoo0, xfoo1; \
519 GO_IF_NONINDEXED_ADDRESS (X, ADDR); \
520 if (GET_CODE (X) == PLUS) \
521 { xfoo = XEXP (X, 0); \
522 if (INDEX_TERM_P (xfoo, MODE)) \
523 { GO_IF_NONINDEXED_ADDRESS (XEXP (X, 1), ADDR); } \
524 xfoo = XEXP (X, 1); \
525 if (INDEX_TERM_P (xfoo, MODE)) \
526 { GO_IF_NONINDEXED_ADDRESS (XEXP (X, 0), ADDR); } \
527 if (CONSTANT_ADDRESS_P (XEXP (X, 0))) \
528 { if (GET_CODE (XEXP (X, 1)) == REG \
529 && REG_OK_FOR_BASE_P (XEXP (X, 1))) \
531 GO_IF_REG_PLUS_INDEX (XEXP (X, 1), MODE, ADDR); } \
532 if (CONSTANT_ADDRESS_P (XEXP (X, 1))) \
533 { if (GET_CODE (XEXP (X, 0)) == REG \
534 && REG_OK_FOR_BASE_P (XEXP (X, 0))) \
536 GO_IF_REG_PLUS_INDEX (XEXP (X, 0), MODE, ADDR); } } }
538 /* Register 16 can never be used for index or base */
540 #ifndef REG_OK_STRICT
541 #define REG_OK_FOR_INDEX_P(X) (REGNO(X) != 16)
542 #define REG_OK_FOR_BASE_P(X) (REGNO(X) != 16)
544 #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
545 #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
548 /* Addressing is too simple to allow optimizing here */
550 #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) {}
552 /* Post_inc and pre_dec always adds 4 */
554 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \
555 { if (GET_CODE(ADDR) == POST_INC || GET_CODE(ADDR) == PRE_DEC) \
557 if (GET_CODE (ADDR) == PLUS) \
558 { if (CONSTANT_ADDRESS_P (XEXP (ADDR, 0)) \
559 && GET_CODE (XEXP (ADDR, 1)) == REG); \
560 else if (CONSTANT_ADDRESS_P (XEXP (ADDR, 1)) \
561 && GET_CODE (XEXP (ADDR, 0)) == REG); \
564 /* Double's are not legitimate as immediate operands */
566 #define LEGITIMATE_CONSTANT_P(X) \
567 (GET_CODE (X) != CONST_DOUBLE)
571 * Miscellaneous Parameters
574 /* the elements in the case jump table are all words */
576 #define CASE_VECTOR_MODE HImode
578 /* Define as C expression which evaluates to nonzero if the tablejump
579 instruction expects the table to contain offsets from the address of the
581 Do not define this if the table should contain absolute addresses. */
582 #define CASE_VECTOR_PC_RELATIVE 1
584 /* tahoe case instructions just fall through to the next instruction */
585 /* if not satisfied. It doesn't support a default action */
587 #define CASE_DROPS_THROUGH
589 /* the standard answer is given here and work ok */
591 #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR
593 /* in a general div case, it's easiest to use TRUNC_DIV_EXPR */
595 #define EASY_DIV_EXPR TRUNC_DIV_EXPR
597 /* the standard seems to be leaving char's as signed so we left it */
598 /* this way even though we think they should be unsigned! */
600 #define DEFAULT_SIGNED_CHAR 1
602 /* the most we can move without cutting down speed is 4 bytes */
606 /* our int is 32 bits */
608 #define INT_TYPE_SIZE 32
610 /* byte access isn't really slower than anything else */
612 #define SLOW_BYTE_ACCESS 0
614 /* zero extension is more than one instruction so try to avoid it */
616 #define SLOW_ZERO_EXTEND
618 /* any bits higher than the low 4 are ignored in the shift count */
619 /* so don't bother zero extending or sign extending them */
621 #define SHIFT_COUNT_TRUNCATED 1
623 /* we don't need to officially convert from one fixed type to another */
624 /* in order to use it as that type. We can just assume it's the same */
626 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
628 /* pass chars as ints */
630 #define PROMOTE_PROTOTYPES 1
632 /* pointers can be represented by an si mode expression */
636 /* function addresses are made by specifying a byte address */
638 #define FUNCTION_MODE QImode
640 /* Define this if addresses of constant functions
641 shouldn't be put through pseudo regs where they can be cse'd.
642 On the tahoe a call with a constant address is much faster than one with a
645 #define NO_FUNCTION_CSE
647 /* specify the costs of various sorts of constants,
648 and also indicate that multiplication is cheap on this machine. */
650 #define CONST_COSTS(RTX,CODE,OUTER_CODE) \
652 /* Constant zero is super cheap due to clr instruction. */ \
653 if (RTX == const0_rtx) return 0; \
654 if ((unsigned) INTVAL (RTX) < 077) return 1; \
655 if (INTVAL (RTX) <= 127 && INTVAL (RTX) >= -128) return 2; \
667 * Condition Code Information
670 /* Nonzero if the results of the previous comparison are
671 in the floating point condition code register. */
673 #define CC_UNCHANGED 04000
676 #define NOTICE_UPDATE_CC(EXP, INSN) \
677 { if (cc_status.flags & CC_UNCHANGED) \
678 /* Happens for cvtld and a few other insns. */ \
679 cc_status.flags &= ~CC_UNCHANGED; \
680 else if (GET_CODE (EXP) == SET) \
681 { if (GET_CODE (SET_SRC (EXP)) == CALL) \
683 else if (GET_CODE (SET_DEST (EXP)) != PC) \
684 { cc_status.flags = 0; \
685 cc_status.value1 = SET_DEST (EXP); \
686 cc_status.value2 = SET_SRC (EXP); } } \
687 else if (GET_CODE (EXP) == PARALLEL \
688 && GET_CODE (XVECEXP (EXP, 0, 0)) == SET \
689 && GET_CODE (SET_DEST (XVECEXP (EXP, 0, 0))) != PC) \
690 { cc_status.flags = 0; \
691 cc_status.value1 = SET_DEST (XVECEXP (EXP, 0, 0)); \
692 cc_status.value2 = SET_SRC (XVECEXP (EXP, 0, 0)); } \
693 /* PARALLELs whose first element sets the PC are aob, sob insns. \
694 They do change the cc's. So drop through and forget the cc's. */ \
695 else CC_STATUS_INIT; \
696 if (cc_status.value1 && GET_CODE (cc_status.value1) == REG \
697 && cc_status.value2 \
698 && reg_overlap_mentioned_p (cc_status.value1, cc_status.value2)) \
699 cc_status.value2 = 0; \
700 if (cc_status.value1 && GET_CODE (cc_status.value1) == MEM \
701 && cc_status.value2 \
702 && GET_CODE (cc_status.value2) == MEM) \
703 cc_status.value2 = 0; }
704 /* Actual condition, one line up, should be that value2's address
705 depends on value1, but that is too much of a pain. */
709 * Output of Assembler Code
712 /* print which tahoe version compiled this code and print a directive */
713 /* to the gnu assembler to say that the following is normal assembly */
716 #define ASM_FILE_START(FILE) \
717 { fprintf (FILE, "#gcc hcx 1.0\n\n"); \
718 output_file_directive ((FILE), main_input_filename);} while (0)
720 #define ASM_FILE_START(FILE) fprintf (FILE, "#gcc tahoe 1.0\n#NO_APP\n");
723 /* the instruction that turns on the APP for the gnu assembler */
725 #define ASM_APP_ON "#APP\n"
727 /* the instruction that turns off the APP for the gnu assembler */
729 #define ASM_APP_OFF "#NO_APP\n"
731 /* what to output before read-only data. */
733 #define TEXT_SECTION_ASM_OP ".text"
735 /* what to output before writable data. */
737 #define DATA_SECTION_ASM_OP ".data"
739 /* this is what we call each of the regs. notice that the FPP reg is */
740 /* called "ac". This should never get used due to the way we've set */
741 /* up FPP instructions in the md file. But we call it "ac" here to */
744 #define REGISTER_NAMES \
745 {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", \
746 "r9", "r10", "r11", "r12", "fp", "sp", "pc", "ac"}
749 /* allow generation of sdb info in the assembly */
750 #define SDB_DEBUGGING_INFO
752 /* allow generation of dbx info in the assembly */
754 #define DBX_DEBUGGING_INFO
756 /* our dbx doesn't support this */
760 /* we don't want symbols broken up */
762 #define DBX_CONTIN_LENGTH 0
764 /* this'll really never be used, but we'll leave it at this */
766 #define DBX_CONTIN_CHAR '?'
770 /* registers are called the same thing in dbx anything else */
771 /* This is necessary even if we generate SDB output */
773 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
775 /* labels are the label followed by a colon and a newline */
776 /* must be a statement, so surround it in a null loop */
778 #define ASM_OUTPUT_LABEL(FILE,NAME) \
779 do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
781 /* use the .globl directive to make labels global for the linker */
783 #define ASM_GLOBALIZE_LABEL(FILE,NAME) \
784 do { fputs (".globl ", FILE); assemble_name (FILE, NAME); fputs ("\n", FILE);} while (0)
786 /* The prefix to add to user-visible assembler symbols. */
788 #define USER_LABEL_PREFIX "_"
790 /* use the standard format for printing internal labels */
792 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM) \
793 fprintf (FILE, "%s%d:\n", PREFIX, NUM)
795 /* a * is used for label indirection in unix assembly */
797 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
798 sprintf (LABEL, "*%s%d", PREFIX, NUM)
800 /* outputting a double is easy cause we only have one kind */
803 #define ASM_OUTPUT_DOUBLE(FILE,VALUE) \
804 fprintf (FILE, "\t.double 0d%.20e\n", (VALUE))
806 #define ASM_OUTPUT_DOUBLE(FILE,VALUE) \
808 union { int i[2]; double d;} temp; \
810 if (TARGET_HEX_FLOAT) \
811 fprintf ((FILE), "\t.long 0x%x,0x%x # %.20e\n", \
812 temp.i[0], temp.i[1], temp.d); \
814 fprintf (FILE, "\t.dfloat 0d%.20e\n", temp.d); \
818 /* This is how to output an assembler line defining a `float' constant. */
821 #define ASM_OUTPUT_FLOAT(FILE,VALUE) \
822 fprintf (FILE, "\t.float 0f%.20e\n", (VALUE))
824 #define ASM_OUTPUT_FLOAT(FILE,VALUE) \
826 union { int i; float f;} temp; \
827 temp.f = (float) (VALUE); \
828 if (TARGET_HEX_FLOAT) \
829 fprintf ((FILE), "\t.long 0x%x # %.20e\n", \
832 fprintf (FILE, "\t.float 0f%.20e\n", temp.f); \
836 /* This is how to output an assembler line defining an `int' constant. */
838 #define ASM_OUTPUT_INT(FILE,VALUE) \
839 ( fprintf (FILE, "\t.long "), \
840 output_addr_const (FILE, (VALUE)), \
841 fprintf (FILE, "\n"))
843 /* Likewise for `char' and `short' constants. */
845 #define ASM_OUTPUT_SHORT(FILE,VALUE) \
846 ( fprintf (FILE, "\t.word "), \
847 output_addr_const (FILE, (VALUE)), \
848 fprintf (FILE, "\n"))
850 #define ASM_OUTPUT_CHAR(FILE,VALUE) \
851 ( fprintf (FILE, "\t.byte "), \
852 output_addr_const (FILE, (VALUE)), \
853 fprintf (FILE, "\n"))
856 /* This is how to output an assembler line for an ASCII string. */
858 #define ASM_OUTPUT_ASCII(FILE, p, size) \
859 do { register int i; \
860 fprintf ((FILE), "\t.ascii \""); \
861 for (i = 0; i < (size); i++) \
863 register int c = (p)[i]; \
864 if (c == '\'' || c == '\\') \
865 putc ('\\', (FILE)); \
866 if (c >= ' ' && c < 0177 && c != '\"') \
870 fprintf ((FILE), "\\%03o", c); \
873 fprintf ((FILE), "\"\n"); } while (0)
876 /* This is how to output an assembler line for a numeric constant byte. */
878 #define ASM_OUTPUT_BYTE(FILE,VALUE) \
879 fprintf (FILE, "\t.byte 0x%x\n", (VALUE))
881 /* this is the insn to push a register onto the stack */
883 #define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \
884 fprintf (FILE, "\tpushl %s\n", reg_names[REGNO])
886 /* this is the insn to pop a register from the stack */
888 #define ASM_OUTPUT_REG_POP(FILE,REGNO) \
889 fprintf (FILE, "\tmovl (sp)+,%s\n", reg_names[REGNO])
891 /* this is required even thought tahoe doesn't support it */
892 /* cause the C code expects it to be defined */
894 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
895 fprintf (FILE, "\t.long L%d\n", VALUE)
897 /* This is how to output an element of a case-vector that is relative. */
899 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
900 fprintf (FILE, "\t.word L%d-L%d\n", VALUE, REL)
902 /* This is how to output an assembler line
903 that says to advance the location counter
904 to a multiple of 2**LOG bytes. */
907 #define CASE_ALIGNMENT 2
908 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
909 if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG))
911 #define CASE_ALIGNMENT 1
912 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
913 LOG ? fprintf (FILE, "\t.align %d\n", (LOG)) : 0
916 /* This is how to skip over some space */
918 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
919 fprintf (FILE, "\t.space %u\n", (SIZE))
921 /* This defines common variables across files */
924 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
925 ( fputs (".comm ", (FILE)), \
926 assemble_name ((FILE), (NAME)), \
927 fprintf ((FILE), ",%u\n", (SIZE)))
929 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
930 ( fputs (".comm ", (FILE)), \
931 assemble_name ((FILE), (NAME)), \
932 fprintf ((FILE), ",%u\n", (ROUNDED)))
935 /* This says how to output an assembler line
936 to define a local common symbol. */
939 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
940 ( fputs ("\t.bss ", (FILE)), \
941 assemble_name ((FILE), (NAME)), \
942 fprintf ((FILE), ",%u,4\n", (SIZE),(ROUNDED)))
944 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
945 ( fputs (".lcomm ", (FILE)), \
946 assemble_name ((FILE), (NAME)), \
947 fprintf ((FILE), ",%u\n", (ROUNDED)))
950 /* code to generate a label */
952 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
953 ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \
954 sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))
956 /* Define the parentheses used to group arithmetic operations
957 in assembler code. */
959 #define ASM_OPEN_PAREN "("
960 #define ASM_CLOSE_PAREN ")"
962 /* Define results of standard character escape sequences. */
964 #define TARGET_BELL 007
965 #define TARGET_BS 010
966 #define TARGET_TAB 011
967 #define TARGET_NEWLINE 012
968 #define TARGET_VT 013
969 #define TARGET_FF 014
970 #define TARGET_CR 015
972 /* Print an instruction operand X on file FILE.
973 CODE is the code from the %-spec that requested printing this operand;
974 if `%z3' was used to print operand 3, then CODE is 'z'.
975 On the Vax, the only code used is `#', indicating that either
976 `d' or `g' should be printed, depending on whether we're using dfloat
978 /* Print an operand. Some difference from the vax code,
979 since the tahoe can't support immediate floats and doubles.
981 %@ means print the proper alignment operand for aligning after a casesi.
982 This depends on the assembler syntax.
983 This is 1 for our assembler, since .align is logarithmic.
985 %s means the number given is supposed to be a shift value, but on
986 the tahoe it should be converted to a number that can be used as a
987 multiplicative constant (cause multiplication is a whole lot faster
988 than shifting). So make the number 2^n instead. */
990 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
993 #define PRINT_OPERAND(FILE, X, CODE) \
995 putc ('0' + CASE_ALIGNMENT, FILE); \
996 else if (CODE == 's') \
997 fprintf (FILE, "$%d", 1 << INTVAL(X)); \
998 else if (GET_CODE (X) == REG) \
999 fprintf (FILE, "%s", reg_names[REGNO (X)]); \
1000 else if (GET_CODE (X) == MEM) \
1001 output_address (XEXP (X, 0)); \
1002 else { putc ('$', FILE); output_addr_const (FILE, X); }}
1004 /* When the operand is an address, call print_operand_address to */
1005 /* do the work from output-tahoe.c. */
1007 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \
1008 print_operand_address (FILE, ADDR)
1010 /* This is for G++ */
1012 #define CRT0_DUMMIES
1013 #define DOT_GLOBAL_START
1015 #define NO_GNU_LD /* because of COFF format */
1016 #define LINK_SPEC "-L/usr/staff/lib"