1 /* Subroutines for insn-output.c for MIPS
2 Contributed by A. Lichnewsky, lich@inria.inria.fr.
3 Changes by Michael Meissner, meissner@osf.org.
4 64 bit r4000 support by Ian Lance Taylor, ian@cygnus.com, and
5 Brendan Eich, brendan@microunity.com.
6 Copyright (C) 1989, 1990, 1991, 1993 Free Software Foundation, Inc.
8 This file is part of GNU CC.
10 GNU CC is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2, or (at your option)
15 GNU CC is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with GNU CC; see the file COPYING. If not, write to
22 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
24 /* ??? The TARGET_FP_CALL_32 macros are intended to simulate a 32 bit
25 calling convention in 64 bit mode. It doesn't work though, and should
26 be replaced with something better designed. */
31 #include "hard-reg-set.h"
33 #include "insn-config.h"
34 #include "conditions.h"
35 #include "insn-flags.h"
36 #include "insn-attr.h"
37 #include "insn-codes.h"
41 #undef MAX /* sys/param.h may also define these */
46 #include <sys/types.h>
59 #if defined(USG) || defined(NO_STAB_H)
60 #include "gstab.h" /* If doing DBX on sysV, use our own stab.h. */
62 #include <stab.h> /* On BSD, use the system's stab.h. */
66 #define STAB_CODE_TYPE enum __stab_debug_code
68 #define STAB_CODE_TYPE int
73 extern char *getenv ();
74 extern char *mktemp ();
76 extern rtx
adj_offsettable_operand ();
77 extern rtx
copy_to_reg ();
80 extern tree
lookup_name ();
81 extern void pfatal_with_name ();
82 extern void warning ();
84 extern tree current_function_decl
;
85 extern FILE *asm_out_file
;
87 /* Enumeration for all of the relational tests, so that we can build
88 arrays indexed by the test type, and not worry about the order
105 /* Global variables for machine-dependent things. */
107 /* Threshold for data being put into the small data/bss area, instead
108 of the normal data area (references to the small data/bss area take
109 1 instruction, and use the global pointer, references to the normal
110 data area takes 2 instructions). */
111 int mips_section_threshold
= -1;
113 /* Count the number of .file directives, so that .loc is up to date. */
114 int num_source_filenames
= 0;
116 /* Count the number of sdb related labels are generated (to find block
117 start and end boundaries). */
118 int sdb_label_count
= 0;
120 /* Next label # for each statment for Silicon Graphics IRIS systems. */
123 /* Non-zero if inside of a function, because the stupid MIPS asm can't
124 handle .files inside of functions. */
125 int inside_function
= 0;
127 /* Files to separate the text and the data output, so that all of the data
128 can be emitted before the text, which will mean that the assembler will
129 generate smaller code, based on the global pointer. */
130 FILE *asm_out_data_file
;
131 FILE *asm_out_text_file
;
133 /* Linked list of all externals that are to be emitted when optimizing
134 for the global pointer if they haven't been declared by the end of
135 the program with an appropriate .comm or initialization. */
138 struct extern_list
*next
; /* next external */
139 char *name
; /* name of the external */
140 int size
; /* size in bytes */
143 /* Name of the file containing the current function. */
144 char *current_function_file
= "";
146 /* Warning given that Mips ECOFF can't support changing files
147 within a function. */
148 int file_in_function_warning
= FALSE
;
150 /* Whether to suppress issuing .loc's because the user attempted
151 to change the filename within a function. */
152 int ignore_line_number
= FALSE
;
154 /* Number of nested .set noreorder, noat, nomacro, and volatile requests. */
160 /* The next branch instruction is a branch likely, not branch normal. */
161 int mips_branch_likely
;
163 /* Count of delay slots and how many are filled. */
164 int dslots_load_total
;
165 int dslots_load_filled
;
166 int dslots_jump_total
;
167 int dslots_jump_filled
;
169 /* # of nops needed by previous insn */
170 int dslots_number_nops
;
172 /* Number of 1/2/3 word references to data items (ie, not jal's). */
175 /* registers to check for load delay */
176 rtx mips_load_reg
, mips_load_reg2
, mips_load_reg3
, mips_load_reg4
;
178 /* Cached operands, and operator to compare for use in set/branch on
182 /* what type of branch to use */
183 enum cmp_type branch_type
;
185 /* Number of previously seen half-pic pointers and references. */
186 static int prev_half_pic_ptrs
= 0;
187 static int prev_half_pic_refs
= 0;
189 /* which cpu are we scheduling for */
190 enum processor_type mips_cpu
;
192 /* which instruction set architecture to use. */
195 /* Strings to hold which cpu and instruction set architecture to use. */
196 char *mips_cpu_string
; /* for -mcpu=<xxx> */
197 char *mips_isa_string
; /* for -mips{1,2,3} */
199 /* Generating calls to position independent functions? */
200 enum mips_abicalls_type mips_abicalls
;
202 /* High and low marks for floating point values which we will accept
203 as legitimate constants for LEGITIMATE_CONSTANT_P. These are
204 initialized in override_options. */
205 REAL_VALUE_TYPE dfhigh
, dflow
, sfhigh
, sflow
;
207 /* Array giving truth value on whether or not a given hard register
208 can support a given mode. */
209 char mips_hard_regno_mode_ok
[(int)MAX_MACHINE_MODE
][FIRST_PSEUDO_REGISTER
];
211 /* Current frame information calculated by compute_frame_size. */
212 struct mips_frame_info current_frame_info
;
214 /* Zero structure to initialize current_frame_info. */
215 struct mips_frame_info zero_frame_info
;
217 /* Temporary filename used to buffer .text until end of program
219 static char *temp_filename
;
221 /* Pseudo-reg holding the address of the current function when
222 generating embedded PIC code. Created by LEGITIMIZE_ADDRESS, used
223 by mips_finalize_pic if it was created. */
224 rtx embedded_pic_fnaddr_rtx
;
226 /* List of all MIPS punctuation characters used by print_operand. */
227 char mips_print_operand_punct
[256];
229 /* Map GCC register number to debugger register number. */
230 int mips_dbx_regno
[FIRST_PSEUDO_REGISTER
];
232 /* Buffer to use to enclose a load/store operation with %{ %} to
233 turn on .set volatile. */
234 static char volatile_buffer
[60];
236 /* Hardware names for the registers. If -mrnames is used, this
237 will be overwritten with mips_sw_reg_names. */
239 char mips_reg_names
[][8] =
241 "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
242 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
243 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
244 "$24", "$25", "$26", "$27", "$28", "$sp", "$fp", "$31",
245 "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7",
246 "$f8", "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15",
247 "$f16", "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23",
248 "$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "$f31",
252 /* Mips software names for the registers, used to overwrite the
253 mips_reg_names array. */
255 char mips_sw_reg_names
[][8] =
257 "$zero","$at", "$v0", "$v1", "$a0", "$a1", "$a2", "$a3",
258 "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7",
259 "$s0", "$s1", "$s2", "$s3", "$s4", "$s5", "$s6", "$s7",
260 "$t8", "$t9", "$k0", "$k1", "$gp", "$sp", "$fp", "$ra",
261 "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7",
262 "$f8", "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15",
263 "$f16", "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23",
264 "$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "$f31",
268 /* Map hard register number to register class */
269 enum reg_class mips_regno_to_class
[] =
271 GR_REGS
, GR_REGS
, GR_REGS
, GR_REGS
,
272 GR_REGS
, GR_REGS
, GR_REGS
, GR_REGS
,
273 GR_REGS
, GR_REGS
, GR_REGS
, GR_REGS
,
274 GR_REGS
, GR_REGS
, GR_REGS
, GR_REGS
,
275 GR_REGS
, GR_REGS
, GR_REGS
, GR_REGS
,
276 GR_REGS
, GR_REGS
, GR_REGS
, GR_REGS
,
277 GR_REGS
, GR_REGS
, GR_REGS
, GR_REGS
,
278 GR_REGS
, GR_REGS
, GR_REGS
, GR_REGS
,
279 FP_REGS
, FP_REGS
, FP_REGS
, FP_REGS
,
280 FP_REGS
, FP_REGS
, FP_REGS
, FP_REGS
,
281 FP_REGS
, FP_REGS
, FP_REGS
, FP_REGS
,
282 FP_REGS
, FP_REGS
, FP_REGS
, FP_REGS
,
283 FP_REGS
, FP_REGS
, FP_REGS
, FP_REGS
,
284 FP_REGS
, FP_REGS
, FP_REGS
, FP_REGS
,
285 FP_REGS
, FP_REGS
, FP_REGS
, FP_REGS
,
286 FP_REGS
, FP_REGS
, FP_REGS
, FP_REGS
,
287 HI_REG
, LO_REG
, ST_REGS
290 /* Map register constraint character to register class. */
291 enum reg_class mips_char_to_class
[256] =
293 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
294 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
295 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
296 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
297 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
298 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
299 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
300 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
301 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
302 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
303 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
304 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
305 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
306 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
307 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
308 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
309 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
310 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
311 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
312 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
313 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
314 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
315 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
316 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
317 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
318 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
319 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
320 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
321 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
322 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
323 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
324 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
325 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
326 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
327 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
328 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
329 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
330 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
331 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
332 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
333 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
334 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
335 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
336 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
337 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
338 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
339 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
340 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
341 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
342 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
343 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
344 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
345 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
346 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
347 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
348 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
349 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
350 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
351 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
352 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
353 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
354 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
355 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
356 NO_REGS
, NO_REGS
, NO_REGS
, NO_REGS
,
360 /* Return truth value of whether OP can be used as an operands
361 where a register or 16 bit unsigned integer is needed. */
364 uns_arith_operand (op
, mode
)
366 enum machine_mode mode
;
368 if (GET_CODE (op
) == CONST_INT
&& SMALL_INT_UNSIGNED (op
))
371 return register_operand (op
, mode
);
374 /* Return truth value of whether OP can be used as an operands
375 where a 16 bit integer is needed */
378 arith_operand (op
, mode
)
380 enum machine_mode mode
;
382 if (GET_CODE (op
) == CONST_INT
&& SMALL_INT (op
))
385 return register_operand (op
, mode
);
388 /* Return truth value of whether OP can be used as an operand in a two
389 address arithmetic insn (such as set 123456,%o4) of mode MODE. */
392 arith32_operand (op
, mode
)
394 enum machine_mode mode
;
396 if (GET_CODE (op
) == CONST_INT
)
399 return register_operand (op
, mode
);
402 /* Return truth value of whether OP is a integer which fits in 16 bits */
407 enum machine_mode mode
;
409 return (GET_CODE (op
) == CONST_INT
&& SMALL_INT (op
));
412 /* Return truth value of whether OP is an integer which is too big to
413 be loaded with one instruction. */
418 enum machine_mode mode
;
422 if (GET_CODE (op
) != CONST_INT
)
426 if ((value
& ~0x0000ffff) == 0) /* ior reg,$r0,value */
429 if (((unsigned long)(value
+ 32768)) <= 32767) /* subu reg,$r0,value */
432 if ((value
& 0x0000ffff) == 0 /* lui reg,value>>16 */
433 && ((value
& ~2147483647) == 0 /* signed value */
434 || (value
& ~2147483647) == ~2147483647))
440 /* Return truth value of whether OP is a register or the constant 0. */
443 reg_or_0_operand (op
, mode
)
445 enum machine_mode mode
;
447 switch (GET_CODE (op
))
453 return (INTVAL (op
) == 0);
456 if (op
!= CONST0_RTX (mode
))
463 return register_operand (op
, mode
);
469 /* Return truth value if a CONST_DOUBLE is ok to be a legitimate constant. */
472 mips_const_double_ok (op
, mode
)
474 enum machine_mode mode
;
478 if (GET_CODE (op
) != CONST_DOUBLE
)
484 if (mode
!= SFmode
&& mode
!= DFmode
)
487 if (op
== CONST0_RTX (mode
))
490 REAL_VALUE_FROM_CONST_DOUBLE (d
, op
);
492 if (REAL_VALUE_ISNAN (d
))
495 if (REAL_VALUE_NEGATIVE (d
))
496 d
= REAL_VALUE_NEGATE (d
);
500 if (REAL_VALUES_LESS (d
, dfhigh
)
501 && REAL_VALUES_LESS (dflow
, d
))
506 if (REAL_VALUES_LESS (d
, sfhigh
)
507 && REAL_VALUES_LESS (sflow
, d
))
514 /* Return truth value if a memory operand fits in a single instruction
515 (ie, register + small offset). */
518 simple_memory_operand (op
, mode
)
520 enum machine_mode mode
;
522 rtx addr
, plus0
, plus1
;
524 /* Eliminate non-memory operations */
525 if (GET_CODE (op
) != MEM
)
528 /* dword operations really put out 2 instructions, so eliminate them. */
529 if (GET_MODE_SIZE (GET_MODE (op
)) > UNITS_PER_WORD
)
532 /* Decode the address now. */
534 switch (GET_CODE (addr
))
543 return SMALL_INT (op
);
546 plus0
= XEXP (addr
, 0);
547 plus1
= XEXP (addr
, 1);
548 if (GET_CODE (plus0
) == REG
549 && GET_CODE (plus1
) == CONST_INT
550 && SMALL_INT (plus1
))
553 else if (GET_CODE (plus1
) == REG
554 && GET_CODE (plus0
) == CONST_INT
555 && SMALL_INT (plus0
))
562 /* We used to allow small symbol refs here (ie, stuff in .sdata
563 or .sbss), but this causes some bugs in G++. Also, it won't
564 interfere if the MIPS linker rewrites the store instruction
565 because the function is PIC. */
567 case LABEL_REF
: /* never gp relative */
571 /* If -G 0, we can never have a GP relative memory operation.
572 Also, save some time if not optimizing. */
577 rtx offset
= const0_rtx
;
578 addr
= eliminate_constant_term (XEXP (addr
, 0), &offset
);
579 if (GET_CODE (op
) != SYMBOL_REF
)
582 /* let's be paranoid.... */
583 if (! SMALL_INT (offset
))
589 return SYMBOL_REF_FLAG (addr
);
596 /* Return true if the code of this rtx pattern is EQ or NE. */
599 equality_op (op
, mode
)
601 enum machine_mode mode
;
603 if (mode
!= GET_MODE (op
))
606 return (GET_CODE (op
) == EQ
|| GET_CODE (op
) == NE
);
609 /* Return true if the code is a relational operations (EQ, LE, etc.) */
614 enum machine_mode mode
;
616 if (mode
!= GET_MODE (op
))
619 return (GET_RTX_CLASS (GET_CODE (op
)) == '<');
622 /* Return true if the operand is either the PC or a label_ref. */
625 pc_or_label_operand (op
, mode
)
627 enum machine_mode mode
;
632 if (GET_CODE (op
) == LABEL_REF
)
638 /* Test for a valid operand for a call instruction.
639 Don't allow the arg pointer register or virtual regs
640 since they may change into reg + const, which the patterns
644 call_insn_operand (op
, mode
)
646 enum machine_mode mode
;
648 if (GET_CODE (op
) == MEM
649 && (CONSTANT_ADDRESS_P (XEXP (op
, 0))
650 || (GET_CODE (XEXP (op
, 0)) == REG
651 && XEXP (op
, 0) != arg_pointer_rtx
652 && !(REGNO (XEXP (op
, 0)) >= FIRST_PSEUDO_REGISTER
653 && REGNO (XEXP (op
, 0)) <= LAST_VIRTUAL_REGISTER
))))
658 /* Returns an operand string for the given instruction's delay slot,
659 after updating filled delay slot statistics.
661 We assume that operands[0] is the target register that is set.
663 In order to check the next insn, most of this functionality is moved
664 to FINAL_PRESCAN_INSN, and we just set the global variables that
667 /* ??? This function no longer does anything useful, because final_prescan_insn
668 now will never emit a nop. */
671 mips_fill_delay_slot (ret
, type
, operands
, cur_insn
)
672 char *ret
; /* normal string to return */
673 enum delay_type type
; /* type of delay */
674 rtx operands
[]; /* operands to use */
675 rtx cur_insn
; /* current insn */
677 register rtx set_reg
;
678 register enum machine_mode mode
;
679 register rtx next_insn
= (cur_insn
) ? NEXT_INSN (cur_insn
) : (rtx
)0;
680 register int num_nops
;
682 if (type
== DELAY_LOAD
|| type
== DELAY_FCMP
)
685 else if (type
== DELAY_HILO
)
691 /* Make sure that we don't put nop's after labels. */
692 next_insn
= NEXT_INSN (cur_insn
);
693 while (next_insn
!= (rtx
)0 && GET_CODE (next_insn
) == NOTE
)
694 next_insn
= NEXT_INSN (next_insn
);
696 dslots_load_total
+= num_nops
;
697 if (TARGET_DEBUG_F_MODE
699 || type
== DELAY_NONE
700 || operands
== (rtx
*)0
701 || cur_insn
== (rtx
)0
702 || next_insn
== (rtx
)0
703 || GET_CODE (next_insn
) == CODE_LABEL
704 || (set_reg
= operands
[0]) == (rtx
)0)
706 dslots_number_nops
= 0;
707 mips_load_reg
= (rtx
)0;
708 mips_load_reg2
= (rtx
)0;
709 mips_load_reg3
= (rtx
)0;
710 mips_load_reg4
= (rtx
)0;
714 set_reg
= operands
[0];
715 if (set_reg
== (rtx
)0)
718 while (GET_CODE (set_reg
) == SUBREG
)
719 set_reg
= SUBREG_REG (set_reg
);
721 mode
= GET_MODE (set_reg
);
722 dslots_number_nops
= num_nops
;
723 mips_load_reg
= set_reg
;
724 if (GET_MODE_SIZE (mode
)
725 > (FP_REG_P (set_reg
) ? UNITS_PER_FPREG
: UNITS_PER_WORD
))
726 mips_load_reg2
= gen_rtx (REG
, SImode
, REGNO (set_reg
) + 1);
730 if (type
== DELAY_HILO
)
732 mips_load_reg3
= gen_rtx (REG
, SImode
, MD_REG_FIRST
);
733 mips_load_reg4
= gen_rtx (REG
, SImode
, MD_REG_FIRST
+1);
745 /* Determine whether a memory reference takes one (based off of the GP pointer),
746 two (normal), or three (label + reg) instructions, and bump the appropriate
747 counter for -mstats. */
750 mips_count_memory_refs (op
, num
)
756 rtx addr
, plus0
, plus1
;
757 enum rtx_code code0
, code1
;
760 if (TARGET_DEBUG_B_MODE
)
762 fprintf (stderr
, "\n========== mips_count_memory_refs:\n");
766 /* Skip MEM if passed, otherwise handle movsi of address. */
767 addr
= (GET_CODE (op
) != MEM
) ? op
: XEXP (op
, 0);
769 /* Loop, going through the address RTL */
773 switch (GET_CODE (addr
))
783 plus0
= XEXP (addr
, 0);
784 plus1
= XEXP (addr
, 1);
785 code0
= GET_CODE (plus0
);
786 code1
= GET_CODE (plus1
);
796 if (code0
== CONST_INT
)
811 if (code1
== CONST_INT
)
818 if (code0
== SYMBOL_REF
|| code0
== LABEL_REF
|| code0
== CONST
)
825 if (code1
== SYMBOL_REF
|| code1
== LABEL_REF
|| code1
== CONST
)
835 n_words
= 2; /* always 2 words */
839 addr
= XEXP (addr
, 0);
844 n_words
= SYMBOL_REF_FLAG (addr
) ? 1 : 2;
853 n_words
+= additional
;
857 num_refs
[n_words
-1] += num
;
861 /* Return RTL for the offset from the current function to the
865 embedded_pic_offset (x
)
868 if (embedded_pic_fnaddr_rtx
== NULL
)
869 embedded_pic_fnaddr_rtx
= gen_reg_rtx (Pmode
);
870 return gen_rtx (CONST
, Pmode
,
871 gen_rtx (MINUS
, Pmode
, x
,
872 XEXP (DECL_RTL (current_function_decl
), 0)));
875 /* Return the appropriate instructions to move one operand to another. */
878 mips_move_1word (operands
, insn
, unsignedp
)
884 rtx op0
= operands
[0];
885 rtx op1
= operands
[1];
886 enum rtx_code code0
= GET_CODE (op0
);
887 enum rtx_code code1
= GET_CODE (op1
);
888 enum machine_mode mode
= GET_MODE (op0
);
889 int subreg_word0
= 0;
890 int subreg_word1
= 0;
891 enum delay_type delay
= DELAY_NONE
;
893 while (code0
== SUBREG
)
895 subreg_word0
+= SUBREG_WORD (op0
);
896 op0
= SUBREG_REG (op0
);
897 code0
= GET_CODE (op0
);
900 while (code1
== SUBREG
)
902 subreg_word1
+= SUBREG_WORD (op1
);
903 op1
= SUBREG_REG (op1
);
904 code1
= GET_CODE (op1
);
909 int regno0
= REGNO (op0
) + subreg_word0
;
913 int regno1
= REGNO (op1
) + subreg_word1
;
915 /* Just in case, don't do anything for assigning a register
916 to itself, unless we are filling a delay slot. */
917 if (regno0
== regno1
&& set_nomacro
== 0)
920 else if (GP_REG_P (regno0
))
922 if (GP_REG_P (regno1
))
925 else if (MD_REG_P (regno1
))
934 if (FP_REG_P (regno1
))
937 else if (regno1
== FPSW_REGNUM
)
938 ret
= "cfc1\t%0,$31";
942 else if (FP_REG_P (regno0
))
944 if (GP_REG_P (regno1
))
950 if (FP_REG_P (regno1
))
951 ret
= "mov.s\t%0,%1";
954 else if (MD_REG_P (regno0
))
956 if (GP_REG_P (regno1
))
963 else if (regno0
== FPSW_REGNUM
)
965 if (GP_REG_P (regno1
))
968 ret
= "ctc1\t%0,$31";
973 else if (code1
== MEM
)
978 mips_count_memory_refs (op1
, 1);
980 if (GP_REG_P (regno0
))
982 /* For loads, use the mode of the memory item, instead of the
983 target, so zero/sign extend can use this code as well. */
984 switch (GET_MODE (op1
))
992 ret
= ((unsignedp
&& TARGET_64BIT
)
997 ret
= (unsignedp
) ? "lhu\t%0,%1" : "lh\t%0,%1";
1000 ret
= (unsignedp
) ? "lbu\t%0,%1" : "lb\t%0,%1";
1005 else if (FP_REG_P (regno0
) && (mode
== SImode
|| mode
== SFmode
))
1008 if (ret
!= (char *)0 && MEM_VOLATILE_P (op1
))
1010 int i
= strlen (ret
);
1011 if (i
> sizeof (volatile_buffer
) - sizeof ("%{%}"))
1014 sprintf (volatile_buffer
, "%%{%s%%}", ret
);
1015 ret
= volatile_buffer
;
1019 else if (code1
== CONST_INT
)
1021 if (INTVAL (op1
) == 0)
1023 if (GP_REG_P (regno0
))
1024 ret
= "move\t%0,%z1";
1026 else if (FP_REG_P (regno0
))
1029 ret
= "mtc1\t%z1,%0";
1033 else if (GP_REG_P (regno0
))
1034 ret
= (INTVAL (op1
) < 0) ? "li\t%0,%1\t\t\t# %X1" : "li\t%0,%X1\t\t# %1";
1037 else if (code1
== CONST_DOUBLE
&& mode
== SFmode
)
1039 if (op1
== CONST0_RTX (SFmode
))
1041 if (GP_REG_P (regno0
))
1042 ret
= "move\t%0,%.";
1044 else if (FP_REG_P (regno0
))
1047 ret
= "mtc1\t%.,%0";
1054 ret
= "li.s\t%0,%1";
1058 else if (code1
== LABEL_REF
)
1061 mips_count_memory_refs (op1
, 1);
1066 else if (code1
== SYMBOL_REF
|| code1
== CONST
)
1068 if (HALF_PIC_P () && CONSTANT_P (op1
) && HALF_PIC_ADDRESS_P (op1
))
1070 rtx offset
= const0_rtx
;
1072 if (GET_CODE (op1
) == CONST
)
1073 op1
= eliminate_constant_term (XEXP (op1
, 0), &offset
);
1075 if (GET_CODE (op1
) == SYMBOL_REF
)
1077 operands
[2] = HALF_PIC_PTR (op1
);
1080 mips_count_memory_refs (operands
[2], 1);
1082 if (INTVAL (offset
) == 0)
1085 ret
= (unsignedp
&& TARGET_64BIT
1091 dslots_load_total
++;
1092 operands
[3] = offset
;
1093 if (unsignedp
&& TARGET_64BIT
)
1094 ret
= (SMALL_INT (offset
))
1095 ? "lwu\t%0,%2%#\n\tadd\t%0,%0,%3"
1096 : "lwu\t%0,%2%#\n\t%[li\t%@,%3\n\tadd\t%0,%0,%@%]";
1098 ret
= (SMALL_INT (offset
))
1099 ? "lw\t%0,%2%#\n\tadd\t%0,%0,%3"
1100 : "lw\t%0,%2%#\n\t%[li\t%@,%3\n\tadd\t%0,%0,%@%]";
1107 mips_count_memory_refs (op1
, 1);
1113 else if (code1
== PLUS
)
1115 rtx add_op0
= XEXP (op1
, 0);
1116 rtx add_op1
= XEXP (op1
, 1);
1118 if (GET_CODE (XEXP (op1
, 1)) == REG
&& GET_CODE (XEXP (op1
, 0)) == CONST_INT
)
1120 add_op0
= XEXP (op1
, 1); /* reverse operands */
1121 add_op1
= XEXP (op1
, 0);
1124 operands
[2] = add_op0
;
1125 operands
[3] = add_op1
;
1126 ret
= "add%:\t%0,%2,%3";
1130 else if (code0
== MEM
)
1133 mips_count_memory_refs (op0
, 1);
1137 int regno1
= REGNO (op1
) + subreg_word1
;
1139 if (GP_REG_P (regno1
))
1144 case SFmode
: ret
= "sw\t%1,%0"; break;
1145 case SImode
: ret
= "sw\t%1,%0"; break;
1146 case HImode
: ret
= "sh\t%1,%0"; break;
1147 case QImode
: ret
= "sb\t%1,%0"; break;
1151 else if (FP_REG_P (regno1
) && (mode
== SImode
|| mode
== SFmode
))
1155 else if (code1
== CONST_INT
&& INTVAL (op1
) == 0)
1160 case SFmode
: ret
= "sw\t%z1,%0"; break;
1161 case SImode
: ret
= "sw\t%z1,%0"; break;
1162 case HImode
: ret
= "sh\t%z1,%0"; break;
1163 case QImode
: ret
= "sb\t%z1,%0"; break;
1167 else if (code1
== CONST_DOUBLE
&& op1
== CONST0_RTX (mode
))
1172 case SFmode
: ret
= "sw\t%.,%0"; break;
1173 case SImode
: ret
= "sw\t%.,%0"; break;
1174 case HImode
: ret
= "sh\t%.,%0"; break;
1175 case QImode
: ret
= "sb\t%.,%0"; break;
1179 if (ret
!= (char *)0 && MEM_VOLATILE_P (op0
))
1181 int i
= strlen (ret
);
1182 if (i
> sizeof (volatile_buffer
) - sizeof ("%{%}"))
1185 sprintf (volatile_buffer
, "%%{%s%%}", ret
);
1186 ret
= volatile_buffer
;
1190 if (ret
== (char *)0)
1192 abort_with_insn (insn
, "Bad move");
1196 if (delay
!= DELAY_NONE
)
1197 return mips_fill_delay_slot (ret
, delay
, operands
, insn
);
1203 /* Return the appropriate instructions to move 2 words */
1206 mips_move_2words (operands
, insn
)
1211 rtx op0
= operands
[0];
1212 rtx op1
= operands
[1];
1213 enum rtx_code code0
= GET_CODE (operands
[0]);
1214 enum rtx_code code1
= GET_CODE (operands
[1]);
1215 int subreg_word0
= 0;
1216 int subreg_word1
= 0;
1217 enum delay_type delay
= DELAY_NONE
;
1219 while (code0
== SUBREG
)
1221 subreg_word0
+= SUBREG_WORD (op0
);
1222 op0
= SUBREG_REG (op0
);
1223 code0
= GET_CODE (op0
);
1226 while (code1
== SUBREG
)
1228 subreg_word1
+= SUBREG_WORD (op1
);
1229 op1
= SUBREG_REG (op1
);
1230 code1
= GET_CODE (op1
);
1235 int regno0
= REGNO (op0
) + subreg_word0
;
1239 int regno1
= REGNO (op1
) + subreg_word1
;
1241 /* Just in case, don't do anything for assigning a register
1242 to itself, unless we are filling a delay slot. */
1243 if (regno0
== regno1
&& set_nomacro
== 0)
1246 else if (FP_REG_P (regno0
))
1248 if (FP_REG_P (regno1
))
1249 ret
= "mov.d\t%0,%1";
1257 abort_with_insn (insn
, "Bad move");
1258 #ifdef TARGET_FP_CALL_32
1259 if (FP_CALL_GP_REG_P (regno1
))
1260 ret
= "dsll\t%1,32\n\tor\t%1,%D1\n\tdmtc1\t%1,%0";
1263 ret
= "dmtc1\t%1,%0";
1266 ret
= "mtc1\t%L1,%0\n\tmtc1\t%M1,%D0";
1270 else if (FP_REG_P (regno1
))
1276 abort_with_insn (insn
, "Bad move");
1277 #ifdef TARGET_FP_CALL_32
1278 if (FP_CALL_GP_REG_P (regno0
))
1279 ret
= "dmfc1\t%0,%1\n\tmfc1\t%D0,%1\n\tdsrl\t%0,32";
1282 ret
= "dmfc1\t%0,%1";
1285 ret
= "mfc1\t%L0,%1\n\tmfc1\t%M0,%D1";
1288 else if (MD_REG_P (regno0
) && GP_REG_P (regno1
))
1294 ret
= "mthi\t%M1\n\tmtlo\t%L1";
1297 else if (GP_REG_P (regno0
) && MD_REG_P (regno1
))
1303 ret
= "mfhi\t%M0\n\tmflo\t%L0";
1306 else if (TARGET_64BIT
)
1307 ret
= "move\t%0,%1";
1309 else if (regno0
!= (regno1
+1))
1310 ret
= "move\t%0,%1\n\tmove\t%D0,%D1";
1313 ret
= "move\t%D0,%D1\n\tmove\t%0,%1";
1316 else if (code1
== CONST_DOUBLE
)
1318 /* Move zero from $0 unless !TARGET_64BIT and recipient
1319 is 64-bit fp reg, in which case generate a constant. */
1320 if (op1
!= CONST0_RTX (GET_MODE (op1
))
1321 || (TARGET_FLOAT64
&& !TARGET_64BIT
&& FP_REG_P (regno0
)))
1323 if (GET_MODE (op1
) == DFmode
)
1326 #ifdef TARGET_FP_CALL_32
1327 if (FP_CALL_GP_REG_P (regno0
))
1329 if (TARGET_FLOAT64
&& !TARGET_64BIT
)
1331 operands
[2] = GEN_INT (CONST_DOUBLE_LOW (op1
));
1332 operands
[3] = GEN_INT (CONST_DOUBLE_HIGH (op1
));
1333 ret
= "li\t%M0,%3\n\tli\t%L0,%2";
1336 ret
= "li.d\t%0,%1\n\tdsll\t%D0,%0,32\n\tdsrl\t%D0,32\n\tdsrl\t%0,32";
1340 ret
= "li.d\t%0,%1";
1343 else if (TARGET_FLOAT64
)
1348 operands
[2] = GEN_INT (CONST_DOUBLE_LOW (op1
));
1349 operands
[3] = GEN_INT (CONST_DOUBLE_HIGH (op1
));
1350 ret
= "li\t%M0,%3\n\tli\t%L0,%2";
1356 if (GP_REG_P (regno0
))
1358 #ifdef TARGET_FP_CALL_32
1359 && ! FP_CALL_GP_REG_P (regno0
)
1363 : "move\t%0,%.\n\tmove\t%D0,%.";
1365 else if (FP_REG_P (regno0
))
1368 ret
= (TARGET_64BIT
)
1370 : "mtc1\t%.,%0\n\tmtc1\t%.,%D0";
1375 else if (code1
== CONST_INT
&& INTVAL (op1
) == 0)
1377 if (GP_REG_P (regno0
))
1378 ret
= (TARGET_64BIT
)
1380 : "move\t%0,%.\n\tmove\t%D0,%.";
1382 else if (FP_REG_P (regno0
))
1385 ret
= (TARGET_64BIT
)
1389 : "mtc1\t%.,%0\n\tmtc1\t%.,%D0");
1393 else if (code1
== CONST_INT
&& GET_MODE (op0
) == DImode
&& GP_REG_P (regno0
))
1399 operands
[2] = GEN_INT (INTVAL (operands
[1]) >= 0 ? 0 : -1);
1400 ret
= "li\t%M0,%2\n\tli\t%L0,%1";
1404 else if (code1
== MEM
)
1409 mips_count_memory_refs (op1
, 2);
1411 if (FP_REG_P (regno0
))
1414 else if (TARGET_64BIT
)
1416 #ifdef TARGET_FP_CALL_32
1417 if (FP_CALL_GP_REG_P (regno0
))
1419 if (offsettable_address_p (FALSE
, SImode
, op1
))
1420 ret
= "lwu\t%0,%1\n\tlwu\t%D0,4+%1";
1422 ret
= "ld\t%0,%1\n\tdsll\t%D0,%0,32\n\tdsrl\t%D0,32\n\tdsrl\t%0,32";
1429 else if (offsettable_address_p (1, DFmode
, XEXP (op1
, 0)))
1431 operands
[2] = adj_offsettable_operand (op1
, 4);
1432 if (reg_mentioned_p (op0
, op1
))
1433 ret
= "lw\t%D0,%2\n\tlw\t%0,%1";
1435 ret
= "lw\t%0,%1\n\tlw\t%D0,%2";
1438 if (ret
!= (char *)0 && MEM_VOLATILE_P (op1
))
1440 int i
= strlen (ret
);
1441 if (i
> sizeof (volatile_buffer
) - sizeof ("%{%}"))
1444 sprintf (volatile_buffer
, "%%{%s%%}", ret
);
1445 ret
= volatile_buffer
;
1449 else if (code1
== LABEL_REF
1450 || code1
== SYMBOL_REF
1455 return mips_move_1word (operands
, insn
, 0);
1459 else if (code0
== MEM
)
1463 int regno1
= REGNO (op1
) + subreg_word1
;
1465 if (FP_REG_P (regno1
))
1468 else if (TARGET_64BIT
)
1470 #ifdef TARGET_FP_CALL_32
1471 if (FP_CALL_GP_REG_P (regno1
))
1472 ret
= "dsll\t%1,32\n\tor\t%1,%D1\n\tsd\t%1,%0";
1478 else if (offsettable_address_p (1, DFmode
, XEXP (op0
, 0)))
1480 operands
[2] = adj_offsettable_operand (op0
, 4);
1481 ret
= "sw\t%1,%0\n\tsw\t%D1,%2";
1485 else if (((code1
== CONST_INT
&& INTVAL (op1
) == 0)
1486 || (code1
== CONST_DOUBLE
1487 && op1
== CONST0_RTX (GET_MODE (op1
))))
1489 || offsettable_address_p (1, DFmode
, XEXP (op0
, 0))))
1495 operands
[2] = adj_offsettable_operand (op0
, 4);
1496 ret
= "sw\t%.,%0\n\tsw\t%.,%2";
1501 mips_count_memory_refs (op0
, 2);
1503 if (ret
!= (char *)0 && MEM_VOLATILE_P (op0
))
1505 int i
= strlen (ret
);
1506 if (i
> sizeof (volatile_buffer
) - sizeof ("%{%}"))
1509 sprintf (volatile_buffer
, "%%{%s%%}", ret
);
1510 ret
= volatile_buffer
;
1514 if (ret
== (char *)0)
1516 abort_with_insn (insn
, "Bad move");
1520 if (delay
!= DELAY_NONE
)
1521 return mips_fill_delay_slot (ret
, delay
, operands
, insn
);
1527 /* Provide the costs of an addressing mode that contains ADDR.
1528 If ADDR is not a valid address, its cost is irrelevant. */
1531 mips_address_cost (addr
)
1534 switch (GET_CODE (addr
))
1548 rtx offset
= const0_rtx
;
1549 addr
= eliminate_constant_term (XEXP (addr
, 0), &offset
);
1550 if (GET_CODE (addr
) == LABEL_REF
)
1553 if (GET_CODE (addr
) != SYMBOL_REF
)
1556 if (! SMALL_INT (offset
))
1562 return SYMBOL_REF_FLAG (addr
) ? 1 : 2;
1566 register rtx plus0
= XEXP (addr
, 0);
1567 register rtx plus1
= XEXP (addr
, 1);
1569 if (GET_CODE (plus0
) != REG
&& GET_CODE (plus1
) == REG
)
1571 plus0
= XEXP (addr
, 1);
1572 plus1
= XEXP (addr
, 0);
1575 if (GET_CODE (plus0
) != REG
)
1578 switch (GET_CODE (plus1
))
1584 return (SMALL_INT (plus1
) ? 1 : 2);
1591 return mips_address_cost (plus1
) + 1;
1599 /* Return true if X is an address which needs a temporary register when
1600 reloaded while generating PIC code. */
1603 pic_address_needs_scratch (x
)
1606 /* An address which is a symbolic plus a non SMALL_INT needs a temp reg. */
1607 if (GET_CODE (x
) == CONST
&& GET_CODE (XEXP (x
, 0)) == PLUS
1608 && GET_CODE (XEXP (XEXP (x
, 0), 0)) == SYMBOL_REF
1609 && GET_CODE (XEXP (XEXP (x
, 0), 1)) == CONST_INT
1610 && ! SMALL_INT (XEXP (XEXP (x
, 0), 1)))
1616 /* Make normal rtx_code into something we can index from an array */
1618 static enum internal_test
1619 map_test_to_internal_test (test_code
)
1620 enum rtx_code test_code
;
1622 enum internal_test test
= ITEST_MAX
;
1627 case EQ
: test
= ITEST_EQ
; break;
1628 case NE
: test
= ITEST_NE
; break;
1629 case GT
: test
= ITEST_GT
; break;
1630 case GE
: test
= ITEST_GE
; break;
1631 case LT
: test
= ITEST_LT
; break;
1632 case LE
: test
= ITEST_LE
; break;
1633 case GTU
: test
= ITEST_GTU
; break;
1634 case GEU
: test
= ITEST_GEU
; break;
1635 case LTU
: test
= ITEST_LTU
; break;
1636 case LEU
: test
= ITEST_LEU
; break;
1643 /* Generate the code to compare two integer values. The return value is:
1644 (reg:SI xx) The pseudo register the comparison is in
1645 (rtx)0 No register, generate a simple branch.
1647 ??? This is called with result nonzero by the Scond patterns in
1648 mips.md. These patterns are called with a target in the mode of
1649 the Scond instruction pattern. Since this must be a constant, we
1650 must use SImode. This means that if RESULT is non-zero, it will
1651 always be an SImode register, even if TARGET_64BIT is true. We
1652 cope with this by calling convert_move rather than emit_move_insn.
1653 This will sometimes lead to an unnecessary extension of the result;
1665 gen_int_relational (test_code
, result
, cmp0
, cmp1
, p_invert
)
1666 enum rtx_code test_code
; /* relational test (EQ, etc) */
1667 rtx result
; /* result to store comp. or 0 if branch */
1668 rtx cmp0
; /* first operand to compare */
1669 rtx cmp1
; /* second operand to compare */
1670 int *p_invert
; /* NULL or ptr to hold whether branch needs */
1671 /* to reverse its test */
1674 enum rtx_code test_code
; /* code to use in instruction (LT vs. LTU) */
1675 int const_low
; /* low bound of constant we can accept */
1676 int const_high
; /* high bound of constant we can accept */
1677 int const_add
; /* constant to add (convert LE -> LT) */
1678 int reverse_regs
; /* reverse registers in test */
1679 int invert_const
; /* != 0 if invert value if cmp1 is constant */
1680 int invert_reg
; /* != 0 if invert value if cmp1 is register */
1681 int unsignedp
; /* != 0 for unsigned comparisons. */
1684 static struct cmp_info info
[ (int)ITEST_MAX
] = {
1686 { XOR
, 0, 65535, 0, 0, 0, 0, 0 }, /* EQ */
1687 { XOR
, 0, 65535, 0, 0, 1, 1, 0 }, /* NE */
1688 { LT
, -32769, 32766, 1, 1, 1, 0, 0 }, /* GT */
1689 { LT
, -32768, 32767, 0, 0, 1, 1, 0 }, /* GE */
1690 { LT
, -32768, 32767, 0, 0, 0, 0, 0 }, /* LT */
1691 { LT
, -32769, 32766, 1, 1, 0, 1, 0 }, /* LE */
1692 { LTU
, -32769, 32766, 1, 1, 1, 0, 1 }, /* GTU */
1693 { LTU
, -32768, 32767, 0, 0, 1, 1, 1 }, /* GEU */
1694 { LTU
, -32768, 32767, 0, 0, 0, 0, 1 }, /* LTU */
1695 { LTU
, -32769, 32766, 1, 1, 0, 1, 1 }, /* LEU */
1698 enum internal_test test
;
1699 enum machine_mode mode
;
1700 struct cmp_info
*p_info
;
1707 test
= map_test_to_internal_test (test_code
);
1708 if (test
== ITEST_MAX
)
1711 p_info
= &info
[ (int)test
];
1712 eqne_p
= (p_info
->test_code
== XOR
);
1714 mode
= GET_MODE (cmp0
);
1715 if (mode
== VOIDmode
)
1716 mode
= GET_MODE (cmp1
);
1718 /* Eliminate simple branches */
1719 branch_p
= (result
== (rtx
)0);
1722 if (GET_CODE (cmp0
) == REG
|| GET_CODE (cmp0
) == SUBREG
)
1724 /* Comparisons against zero are simple branches */
1725 if (GET_CODE (cmp1
) == CONST_INT
&& INTVAL (cmp1
) == 0)
1728 /* Test for beq/bne. */
1733 /* allocate a pseudo to calculate the value in. */
1734 result
= gen_reg_rtx (mode
);
1737 /* Make sure we can handle any constants given to us. */
1738 if (GET_CODE (cmp0
) == CONST_INT
)
1739 cmp0
= force_reg (mode
, cmp0
);
1741 if (GET_CODE (cmp1
) == CONST_INT
)
1743 HOST_WIDE_INT value
= INTVAL (cmp1
);
1744 if (value
< p_info
->const_low
1745 || value
> p_info
->const_high
1746 /* ??? Why? And why wasn't the similar code below modified too? */
1748 && HOST_BITS_PER_WIDE_INT
< 64
1749 && p_info
->const_add
!= 0
1750 && ((p_info
->unsignedp
1751 ? ((unsigned HOST_WIDE_INT
) (value
+ p_info
->const_add
)
1753 : (value
+ p_info
->const_add
) > INTVAL (cmp1
))
1754 != (p_info
->const_add
> 0))))
1755 cmp1
= force_reg (mode
, cmp1
);
1758 /* See if we need to invert the result. */
1759 invert
= (GET_CODE (cmp1
) == CONST_INT
)
1760 ? p_info
->invert_const
1761 : p_info
->invert_reg
;
1763 if (p_invert
!= (int *)0)
1769 /* Comparison to constants, may involve adding 1 to change a LT into LE.
1770 Comparison between two registers, may involve switching operands. */
1771 if (GET_CODE (cmp1
) == CONST_INT
)
1773 if (p_info
->const_add
!= 0)
1775 HOST_WIDE_INT
new = INTVAL (cmp1
) + p_info
->const_add
;
1776 /* If modification of cmp1 caused overflow,
1777 we would get the wrong answer if we follow the usual path;
1778 thus, x > 0xffffffffu would turn into x > 0u. */
1779 if ((p_info
->unsignedp
1780 ? (unsigned HOST_WIDE_INT
) new > INTVAL (cmp1
)
1781 : new > INTVAL (cmp1
))
1782 != (p_info
->const_add
> 0))
1784 /* This test is always true, but if INVERT is true then
1785 the result of the test needs to be inverted so 0 should
1786 be returned instead. */
1787 emit_move_insn (result
, invert
? const0_rtx
: const_true_rtx
);
1791 cmp1
= GEN_INT (new);
1794 else if (p_info
->reverse_regs
)
1801 if (test
== ITEST_NE
&& GET_CODE (cmp1
) == CONST_INT
&& INTVAL (cmp1
) == 0)
1805 reg
= (invert
|| eqne_p
) ? gen_reg_rtx (mode
) : result
;
1806 convert_move (reg
, gen_rtx (p_info
->test_code
, mode
, cmp0
, cmp1
), 0);
1809 if (test
== ITEST_NE
)
1811 convert_move (result
, gen_rtx (GTU
, mode
, reg
, const0_rtx
), 0);
1815 else if (test
== ITEST_EQ
)
1817 reg2
= (invert
) ? gen_reg_rtx (mode
) : result
;
1818 convert_move (reg2
, gen_rtx (LTU
, mode
, reg
, const1_rtx
), 0);
1823 convert_move (result
, gen_rtx (XOR
, mode
, reg
, const1_rtx
), 0);
1829 /* Emit the common code for doing conditional branches.
1830 operand[0] is the label to jump to.
1831 The comparison operands are saved away by cmp{si,di,sf,df}. */
1834 gen_conditional_branch (operands
, test_code
)
1836 enum rtx_code test_code
;
1838 static enum machine_mode mode_map
[(int)CMP_MAX
][(int)ITEST_MAX
] = {
1865 CC_REV_FPmode
, /* ne */
1877 CC_REV_FPmode
, /* ne */
1889 enum machine_mode mode
;
1890 enum cmp_type type
= branch_type
;
1891 rtx cmp0
= branch_cmp
[0];
1892 rtx cmp1
= branch_cmp
[1];
1893 rtx label1
= gen_rtx (LABEL_REF
, VOIDmode
, operands
[0]);
1894 rtx label2
= pc_rtx
;
1897 enum internal_test test
= map_test_to_internal_test (test_code
);
1899 if (test
== ITEST_MAX
)
1905 /* Get the machine mode to use (CCmode, CC_EQmode, CC_FPmode, or CC_REV_FPmode). */
1906 mode
= mode_map
[(int)type
][(int)test
];
1907 if (mode
== VOIDmode
)
1917 reg
= gen_int_relational (test_code
, (rtx
)0, cmp0
, cmp1
, &invert
);
1925 /* Make sure not non-zero constant if ==/!= */
1926 else if (GET_CODE (cmp1
) == CONST_INT
&& INTVAL (cmp1
) != 0)
1927 cmp1
= force_reg (mode
, cmp1
);
1934 rtx reg
= gen_rtx (REG
, mode
, FPSW_REGNUM
);
1935 emit_insn (gen_rtx (SET
, VOIDmode
, reg
, gen_rtx (test_code
, mode
, cmp0
, cmp1
)));
1943 /* Generate the jump */
1950 emit_jump_insn (gen_rtx (SET
, VOIDmode
,
1952 gen_rtx (IF_THEN_ELSE
, VOIDmode
,
1953 gen_rtx (test_code
, mode
, cmp0
, cmp1
),
1960 abort_with_insn (gen_rtx (test_code
, mode
, cmp0
, cmp1
), "bad test");
1965 /* Internal code to generate the load and store of one word/short/byte.
1966 The load is emitted directly, and the store insn is returned. */
1968 #define UNITS_PER_MIPS_DWORD 8
1969 #define UNITS_PER_MIPS_WORD 4
1970 #define UNITS_PER_MIPS_HWORD 2
1973 block_move_load_store (dest_reg
, src_reg
, p_bytes
, p_offset
, align
, orig_src
)
1974 rtx src_reg
; /* register holding source memory address */
1975 rtx dest_reg
; /* register holding dest. memory address */
1976 int *p_bytes
; /* pointer to # bytes remaining */
1977 int *p_offset
; /* pointer to current offset */
1978 int align
; /* alignment */
1979 rtx orig_src
; /* original source for making a reg note */
1981 int bytes
; /* # bytes remaining */
1982 int offset
; /* offset to use */
1983 int size
; /* size in bytes of load/store */
1984 enum machine_mode mode
; /* mode to use for load/store */
1985 rtx reg
; /* temporary register */
1986 rtx src_addr
; /* source address */
1987 rtx dest_addr
; /* destination address */
1988 rtx insn
; /* insn of the load */
1989 rtx orig_src_addr
; /* original source address */
1990 rtx (*load_func
)(); /* function to generate load insn */
1991 rtx (*store_func
)(); /* function to generate destination insn */
1994 if (bytes
<= 0 || align
<= 0)
1997 if (bytes
>= UNITS_PER_MIPS_DWORD
&& align
>= UNIS_PER_MIPS_DWORD
)
2000 size
= UNITS_PER_MIPS_DWORD
;
2001 load_func
= gen_movdi
;
2002 store_func
= gen_movdi
;
2004 else if (bytes
>= UNITS_PER_MIPS_WORD
&& align
>= UNITS_PER_MIPS_WORD
)
2007 size
= UNITS_PER_MIPS_WORD
;
2008 load_func
= gen_movsi
;
2009 store_func
= gen_movsi
;
2013 /* Don't generate unaligned moves here, rather defer those to the
2014 general movestrsi_internal pattern.
2015 If this gets commented back in, then should add the dword equivalent. */
2016 else if (bytes
>= UNITS_PER_MIPS_WORD
)
2019 size
= UNITS_PER_MIPS_WORD
;
2020 load_func
= gen_movsi_ulw
;
2021 store_func
= gen_movsi_usw
;
2025 else if (bytes
>= UNITS_PER_MIPS_SHORT
&& align
>= UNITS_PER_MIPS_SHORT
)
2028 size
= UNITS_PER_MIPS_SHORT
;
2029 load_func
= gen_movhi
;
2030 store_func
= gen_movhi
;
2037 load_func
= gen_movqi
;
2038 store_func
= gen_movqi
;
2042 *p_offset
= offset
+ size
;
2043 *p_bytes
= bytes
- size
;
2048 dest_addr
= dest_reg
;
2052 src_addr
= gen_rtx (PLUS
, Pmode
, src_reg
, GEN_INT (offset
));
2053 dest_addr
= gen_rtx (PLUS
, Pmode
, dest_reg
, GEN_INT (offset
));
2056 reg
= gen_reg_rtx (mode
);
2057 insn
= emit_insn ((*load_func
) (reg
, gen_rtx (MEM
, mode
, src_addr
)));
2058 orig_src_addr
= XEXP (orig_src
, 0);
2059 if (CONSTANT_P (orig_src_addr
))
2060 REG_NOTES (insn
) = gen_rtx (EXPR_LIST
, REG_EQUIV
,
2061 plus_constant (orig_src_addr
, offset
),
2064 return (*store_func
) (gen_rtx (MEM
, mode
, dest_addr
), reg
);
2069 /* Write a series of loads/stores to move some bytes. Generate load/stores as follows:
2081 This way, no NOP's are needed, except at the end, and only
2082 two temp registers are needed. Two delay slots are used
2083 in deference to the R4000. */
2087 block_move_sequence (dest_reg
, src_reg
, bytes
, align
, orig_src
)
2088 rtx dest_reg
; /* register holding destination address */
2089 rtx src_reg
; /* register holding source address */
2090 int bytes
; /* # bytes to move */
2091 int align
; /* max alignment to assume */
2092 rtx orig_src
; /* original source for making a reg note */
2095 rtx prev2_store
= (rtx
)0;
2096 rtx prev_store
= (rtx
)0;
2097 rtx cur_store
= (rtx
)0;
2101 /* Is there a store to do? */
2103 emit_insn (prev2_store
);
2105 prev2_store
= prev_store
;
2106 prev_store
= cur_store
;
2107 cur_store
= block_move_load_store (dest_reg
, src_reg
,
2112 /* Finish up last three stores. */
2114 emit_insn (prev2_store
);
2117 emit_insn (prev_store
);
2120 emit_insn (cur_store
);
2125 /* Write a loop to move a constant number of bytes. Generate load/stores as follows:
2131 temp<last> = src[MAX_MOVE_REGS-1];
2135 dest[MAX_MOVE_REGS-1] = temp<last>;
2136 src += MAX_MOVE_REGS;
2137 dest += MAX_MOVE_REGS;
2138 } while (src != final);
2140 This way, no NOP's are needed, and only MAX_MOVE_REGS+3 temp
2141 registers are needed.
2143 Aligned moves move MAX_MOVE_REGS*4 bytes every (2*MAX_MOVE_REGS)+3
2144 cycles, unaligned moves move MAX_MOVE_REGS*4 bytes every
2145 (4*MAX_MOVE_REGS)+3 cycles, assuming no cache misses. */
2147 #define MAX_MOVE_REGS 4
2148 #define MAX_MOVE_BYTES (MAX_MOVE_REGS * UNITS_PER_WORD)
2150 /* ??? Should add code to use DWORD load/stores. */
2153 block_move_loop (dest_reg
, src_reg
, bytes
, align
, orig_src
)
2154 rtx dest_reg
; /* register holding destination address */
2155 rtx src_reg
; /* register holding source address */
2156 int bytes
; /* # bytes to move */
2157 int align
; /* alignment */
2158 rtx orig_src
; /* original source for making a reg note */
2160 rtx dest_mem
= gen_rtx (MEM
, BLKmode
, dest_reg
);
2161 rtx src_mem
= gen_rtx (MEM
, BLKmode
, src_reg
);
2162 rtx align_rtx
= GEN_INT (align
);
2168 if (bytes
< 2*MAX_MOVE_BYTES
)
2171 leftover
= bytes
% MAX_MOVE_BYTES
;
2174 label
= gen_label_rtx ();
2175 final_src
= gen_reg_rtx (Pmode
);
2176 bytes_rtx
= GEN_INT (bytes
);
2182 emit_insn (gen_movdi (final_src
, bytes_rtx
));
2183 emit_insn (gen_adddi3 (final_src
, final_src
, src_reg
));
2187 emit_insn (gen_movsi (final_src
, bytes_rtx
));
2188 emit_insn (gen_addsi3 (final_src
, final_src
, src_reg
));
2194 emit_insn (gen_adddi3 (final_src
, src_reg
, bytes_rtx
));
2196 emit_insn (gen_addsi3 (final_src
, src_reg
, bytes_rtx
));
2201 bytes_rtx
= GEN_INT (MAX_MOVE_BYTES
);
2202 emit_insn (gen_movstrsi_internal (dest_mem
, src_mem
, bytes_rtx
, align_rtx
));
2205 emit_insn (gen_adddi3 (src_reg
, src_reg
, bytes_rtx
));
2206 emit_insn (gen_adddi3 (dest_reg
, dest_reg
, bytes_rtx
));
2207 emit_insn (gen_cmpdi (src_reg
, final_src
));
2211 emit_insn (gen_addsi3 (src_reg
, src_reg
, bytes_rtx
));
2212 emit_insn (gen_addsi3 (dest_reg
, dest_reg
, bytes_rtx
));
2213 emit_insn (gen_cmpsi (src_reg
, final_src
));
2215 emit_jump_insn (gen_bne (label
));
2218 emit_insn (gen_movstrsi_internal (dest_mem
, src_mem
,
2224 /* Use a library function to move some bytes. */
2227 block_move_call (dest_reg
, src_reg
, bytes_rtx
)
2232 /* We want to pass the size as Pmode, which will normally be SImode
2233 but will be DImode if we are using 64 bit longs and pointers. */
2234 if (GET_MODE (bytes_rtx
) != VOIDmode
2235 && GET_MODE (bytes_rtx
) != Pmode
)
2236 bytes_rtx
= convert_to_mode (Pmode
, bytes_rtx
, TRUE
);
2238 #ifdef TARGET_MEM_FUNCTIONS
2239 emit_library_call (gen_rtx (SYMBOL_REF
, Pmode
, "memcpy"), 0,
2245 emit_library_call (gen_rtx (SYMBOL_REF
, Pmode
, "bcopy"), 0,
2254 /* Expand string/block move operations.
2256 operands[0] is the pointer to the destination.
2257 operands[1] is the pointer to the source.
2258 operands[2] is the number of bytes to move.
2259 operands[3] is the alignment. */
2262 expand_block_move (operands
)
2265 rtx bytes_rtx
= operands
[2];
2266 rtx align_rtx
= operands
[3];
2267 int constp
= (GET_CODE (bytes_rtx
) == CONST_INT
);
2268 int bytes
= (constp
? INTVAL (bytes_rtx
) : 0);
2269 int align
= INTVAL (align_rtx
);
2270 rtx orig_src
= operands
[1];
2274 if (constp
&& bytes
<= 0)
2277 if (align
> UNITS_PER_WORD
)
2278 align
= UNITS_PER_WORD
;
2280 /* Move the address into scratch registers. */
2281 dest_reg
= copy_addr_to_reg (XEXP (operands
[0], 0));
2282 src_reg
= copy_addr_to_reg (XEXP (orig_src
, 0));
2285 block_move_call (dest_reg
, src_reg
, bytes_rtx
);
2288 else if (constp
&& bytes
<= 3*align
)
2289 block_move_sequence (dest_reg
, src_reg
, bytes
, align
, orig_src
);
2292 else if (constp
&& bytes
<= 2*MAX_MOVE_BYTES
)
2293 emit_insn (gen_movstrsi_internal (gen_rtx (MEM
, BLKmode
, dest_reg
),
2294 gen_rtx (MEM
, BLKmode
, src_reg
),
2295 bytes_rtx
, align_rtx
));
2297 else if (constp
&& align
>= UNITS_PER_WORD
&& optimize
)
2298 block_move_loop (dest_reg
, src_reg
, bytes
, align
, orig_src
);
2300 else if (constp
&& optimize
)
2302 /* If the alignment is not word aligned, generate a test at
2303 runtime, to see whether things wound up aligned, and we
2304 can use the faster lw/sw instead ulw/usw. */
2306 rtx temp
= gen_reg_rtx (Pmode
);
2307 rtx aligned_label
= gen_label_rtx ();
2308 rtx join_label
= gen_label_rtx ();
2309 int leftover
= bytes
% MAX_MOVE_BYTES
;
2315 emit_insn (gen_iordi3 (temp
, src_reg
, dest_reg
));
2316 emit_insn (gen_anddi3 (temp
, temp
, GEN_INT (UNITS_PER_WORD
-1)));
2317 emit_insn (gen_cmpdi (temp
, const0_rtx
));
2321 emit_insn (gen_iorsi3 (temp
, src_reg
, dest_reg
));
2322 emit_insn (gen_andsi3 (temp
, temp
, GEN_INT (UNITS_PER_WORD
-1)));
2323 emit_insn (gen_cmpsi (temp
, const0_rtx
));
2325 emit_jump_insn (gen_beq (aligned_label
));
2327 /* Unaligned loop. */
2328 block_move_loop (dest_reg
, src_reg
, bytes
, 1, orig_src
);
2329 emit_jump_insn (gen_jump (join_label
));
2333 emit_label (aligned_label
);
2334 block_move_loop (dest_reg
, src_reg
, bytes
, UNITS_PER_WORD
, orig_src
);
2335 emit_label (join_label
);
2337 /* Bytes at the end of the loop. */
2341 if (leftover
<= 3*align
)
2342 block_move_sequence (dest_reg
, src_reg
, leftover
, align
, orig_src
);
2346 emit_insn (gen_movstrsi_internal (gen_rtx (MEM
, BLKmode
, dest_reg
),
2347 gen_rtx (MEM
, BLKmode
, src_reg
),
2354 block_move_call (dest_reg
, src_reg
, bytes_rtx
);
2358 /* Emit load/stores for a small constant block_move.
2360 operands[0] is the memory address of the destination.
2361 operands[1] is the memory address of the source.
2362 operands[2] is the number of bytes to move.
2363 operands[3] is the alignment.
2364 operands[4] is a temp register.
2365 operands[5] is a temp register.
2367 operands[3+num_regs] is the last temp register.
2369 The block move type can be one of the following:
2370 BLOCK_MOVE_NORMAL Do all of the block move.
2371 BLOCK_MOVE_NOT_LAST Do all but the last store.
2372 BLOCK_MOVE_LAST Do just the last store. */
2375 output_block_move (insn
, operands
, num_regs
, move_type
)
2379 enum block_move_type move_type
;
2381 rtx dest_reg
= XEXP (operands
[0], 0);
2382 rtx src_reg
= XEXP (operands
[1], 0);
2383 int bytes
= INTVAL (operands
[2]);
2384 int align
= INTVAL (operands
[3]);
2387 int use_lwl_lwr
= FALSE
;
2388 int last_operand
= num_regs
+4;
2394 char *load
; /* load insn without nop */
2395 char *load_nop
; /* load insn with trailing nop */
2396 char *store
; /* store insn */
2397 char *final
; /* if last_store used: NULL or swr */
2398 char *last_store
; /* last store instruction */
2399 int offset
; /* current offset */
2400 enum machine_mode mode
; /* mode to use on (MEM) */
2403 /* Detect a bug in GCC, where it can give us a register
2404 the same as one of the addressing registers and reduce
2405 the number of registers available. */
2407 i
< last_operand
&& safe_regs
< (sizeof(xoperands
) / sizeof(xoperands
[0]));
2410 if (!reg_mentioned_p (operands
[i
], operands
[0])
2411 && !reg_mentioned_p (operands
[i
], operands
[1]))
2413 xoperands
[safe_regs
++] = operands
[i
];
2416 if (safe_regs
< last_operand
)
2418 xoperands
[0] = operands
[0];
2419 xoperands
[1] = operands
[1];
2420 xoperands
[2] = operands
[2];
2421 xoperands
[3] = operands
[3];
2422 return output_block_move (insn
, xoperands
, safe_regs
-4, move_type
);
2425 /* If we are given global or static addresses, and we would be
2426 emitting a few instructions, try to save time by using a
2427 temporary register for the pointer. */
2428 if (num_regs
> 2 && (bytes
> 2*align
|| move_type
!= BLOCK_MOVE_NORMAL
))
2430 if (CONSTANT_P (src_reg
))
2433 mips_count_memory_refs (operands
[1], 1);
2435 src_reg
= operands
[ 3 + num_regs
-- ];
2436 if (move_type
!= BLOCK_MOVE_LAST
)
2438 xoperands
[1] = operands
[1];
2439 xoperands
[0] = src_reg
;
2440 output_asm_insn ("la\t%0,%1", xoperands
);
2444 if (CONSTANT_P (dest_reg
))
2447 mips_count_memory_refs (operands
[0], 1);
2449 dest_reg
= operands
[ 3 + num_regs
-- ];
2450 if (move_type
!= BLOCK_MOVE_LAST
)
2452 xoperands
[1] = operands
[0];
2453 xoperands
[0] = dest_reg
;
2454 output_asm_insn ("la\t%0,%1", xoperands
);
2459 if (num_regs
> (sizeof (load_store
) / sizeof (load_store
[0])))
2460 num_regs
= (sizeof (load_store
) / sizeof (load_store
[0]));
2462 else if (num_regs
< 1)
2463 abort_with_insn (insn
, "Cannot do block move, not enough scratch registers");
2467 load_store
[num
].offset
= offset
;
2469 if (TARGET_64BIT
&& bytes
>= 8 && align
>= 8)
2471 load_store
[num
].load
= "ld\t%0,%1";
2472 load_store
[num
].load_nop
= "ld\t%0,%1%#";
2473 load_store
[num
].store
= "sd\t%0,%1";
2474 load_store
[num
].last_store
= "sd\t%0,%1";
2475 load_store
[num
].final
= (char *)0;
2476 load_store
[num
].mode
= DImode
;
2481 /* ??? Fails because of a MIPS assembler bug? */
2482 else if (TARGET_64BIT
&& bytes
>= 8)
2484 #if BYTES_BIG_ENDIAN
2485 load_store
[num
].load
= "ldl\t%0,%1\n\tldr\t%0,%2";
2486 load_store
[num
].load_nop
= "ldl\t%0,%1\n\tldr\t%0,%2%#";
2487 load_store
[num
].store
= "sdl\t%0,%1\n\tsdr\t%0,%2";
2488 load_store
[num
].last_store
= "sdr\t%0,%2";
2489 load_store
[num
].final
= "sdl\t%0,%1";
2491 load_store
[num
].load
= "ldl\t%0,%2\n\tldr\t%0,%1";
2492 load_store
[num
].load_nop
= "ldl\t%0,%2\n\tldr\t%0,%1%#";
2493 load_store
[num
].store
= "sdl\t%0,%2\n\tsdr\t%0,%1";
2494 load_store
[num
].last_store
= "sdr\t%0,%1";
2495 load_store
[num
].final
= "sdl\t%0,%2";
2497 load_store
[num
].mode
= DImode
;
2503 else if (bytes
>= 4 && align
>= 4)
2505 load_store
[num
].load
= "lw\t%0,%1";
2506 load_store
[num
].load_nop
= "lw\t%0,%1%#";
2507 load_store
[num
].store
= "sw\t%0,%1";
2508 load_store
[num
].last_store
= "sw\t%0,%1";
2509 load_store
[num
].final
= (char *)0;
2510 load_store
[num
].mode
= SImode
;
2515 else if (bytes
>= 4)
2517 #if BYTES_BIG_ENDIAN
2518 load_store
[num
].load
= "lwl\t%0,%1\n\tlwr\t%0,%2";
2519 load_store
[num
].load_nop
= "lwl\t%0,%1\n\tlwr\t%0,%2%#";
2520 load_store
[num
].store
= "swl\t%0,%1\n\tswr\t%0,%2";
2521 load_store
[num
].last_store
= "swr\t%0,%2";
2522 load_store
[num
].final
= "swl\t%0,%1";
2524 load_store
[num
].load
= "lwl\t%0,%2\n\tlwr\t%0,%1";
2525 load_store
[num
].load_nop
= "lwl\t%0,%2\n\tlwr\t%0,%1%#";
2526 load_store
[num
].store
= "swl\t%0,%2\n\tswr\t%0,%1";
2527 load_store
[num
].last_store
= "swr\t%0,%1";
2528 load_store
[num
].final
= "swl\t%0,%2";
2530 load_store
[num
].mode
= SImode
;
2536 else if (bytes
>= 2 && align
>= 2)
2538 load_store
[num
].load
= "lh\t%0,%1";
2539 load_store
[num
].load_nop
= "lh\t%0,%1%#";
2540 load_store
[num
].store
= "sh\t%0,%1";
2541 load_store
[num
].last_store
= "sh\t%0,%1";
2542 load_store
[num
].final
= (char *)0;
2543 load_store
[num
].mode
= HImode
;
2550 load_store
[num
].load
= "lb\t%0,%1";
2551 load_store
[num
].load_nop
= "lb\t%0,%1%#";
2552 load_store
[num
].store
= "sb\t%0,%1";
2553 load_store
[num
].last_store
= "sb\t%0,%1";
2554 load_store
[num
].final
= (char *)0;
2555 load_store
[num
].mode
= QImode
;
2560 if (TARGET_STATS
&& move_type
!= BLOCK_MOVE_LAST
)
2562 dslots_load_total
++;
2563 dslots_load_filled
++;
2565 if (CONSTANT_P (src_reg
))
2566 mips_count_memory_refs (src_reg
, 1);
2568 if (CONSTANT_P (dest_reg
))
2569 mips_count_memory_refs (dest_reg
, 1);
2572 /* Emit load/stores now if we have run out of registers or are
2573 at the end of the move. */
2575 if (++num
== num_regs
|| bytes
== 0)
2577 /* If only load/store, we need a NOP after the load. */
2580 load_store
[0].load
= load_store
[0].load_nop
;
2581 if (TARGET_STATS
&& move_type
!= BLOCK_MOVE_LAST
)
2582 dslots_load_filled
--;
2585 if (move_type
!= BLOCK_MOVE_LAST
)
2587 for (i
= 0; i
< num
; i
++)
2594 if (GET_MODE (operands
[i
+4]) != load_store
[i
].mode
)
2595 operands
[i
+4] = gen_rtx (REG
, load_store
[i
].mode
, REGNO (operands
[i
+4]));
2597 offset
= load_store
[i
].offset
;
2598 xoperands
[0] = operands
[i
+4];
2599 xoperands
[1] = gen_rtx (MEM
, load_store
[i
].mode
,
2600 plus_constant (src_reg
, offset
));
2605 extra_offset
= GET_MODE_SIZE (load_store
[i
].mode
) - 1;
2606 xoperands
[2] = gen_rtx (MEM
, load_store
[i
].mode
,
2607 plus_constant (src_reg
,
2612 output_asm_insn (load_store
[i
].load
, xoperands
);
2616 for (i
= 0; i
< num
; i
++)
2618 int last_p
= (i
== num
-1 && bytes
== 0);
2619 int offset
= load_store
[i
].offset
;
2621 xoperands
[0] = operands
[i
+4];
2622 xoperands
[1] = gen_rtx (MEM
, load_store
[i
].mode
,
2623 plus_constant (dest_reg
, offset
));
2629 extra_offset
= GET_MODE_SIZE (load_store
[i
].mode
) - 1;
2630 xoperands
[2] = gen_rtx (MEM
, load_store
[i
].mode
,
2631 plus_constant (dest_reg
,
2636 if (move_type
== BLOCK_MOVE_NORMAL
)
2637 output_asm_insn (load_store
[i
].store
, xoperands
);
2639 else if (move_type
== BLOCK_MOVE_NOT_LAST
)
2642 output_asm_insn (load_store
[i
].store
, xoperands
);
2644 else if (load_store
[i
].final
!= (char *)0)
2645 output_asm_insn (load_store
[i
].final
, xoperands
);
2649 output_asm_insn (load_store
[i
].last_store
, xoperands
);
2652 num
= 0; /* reset load_store */
2653 use_lwl_lwr
= FALSE
;
2661 /* Argument support functions. */
2663 /* Initialize CUMULATIVE_ARGS for a function. */
2666 init_cumulative_args (cum
, fntype
, libname
)
2667 CUMULATIVE_ARGS
*cum
; /* argument info to initialize */
2668 tree fntype
; /* tree ptr for function decl */
2669 rtx libname
; /* SYMBOL_REF of library name or 0 */
2671 static CUMULATIVE_ARGS zero_cum
;
2672 tree param
, next_param
;
2674 if (TARGET_DEBUG_E_MODE
)
2676 fprintf (stderr
, "\ninit_cumulative_args, fntype = 0x%.8lx", (long)fntype
);
2678 fputc ('\n', stderr
);
2682 tree ret_type
= TREE_TYPE (fntype
);
2683 fprintf (stderr
, ", fntype code = %s, ret code = %s\n",
2684 tree_code_name
[ (int)TREE_CODE (fntype
) ],
2685 tree_code_name
[ (int)TREE_CODE (ret_type
) ]);
2691 /* Determine if this function has variable arguments. This is
2692 indicated by the last argument being 'void_type_mode' if there
2693 are no variable arguments. The standard MIPS calling sequence
2694 passes all arguments in the general purpose registers in this
2697 for (param
= (fntype
) ? TYPE_ARG_TYPES (fntype
) : 0;
2701 next_param
= TREE_CHAIN (param
);
2702 if (next_param
== (tree
)0 && TREE_VALUE (param
) != void_type_node
)
2703 cum
->gp_reg_found
= 1;
2707 /* Advance the argument to the next argument position. */
2710 function_arg_advance (cum
, mode
, type
, named
)
2711 CUMULATIVE_ARGS
*cum
; /* current arg information */
2712 enum machine_mode mode
; /* current arg mode */
2713 tree type
; /* type of the argument or 0 if lib support */
2714 int named
; /* whether or not the argument was named */
2716 if (TARGET_DEBUG_E_MODE
)
2718 "function_adv( {gp reg found = %d, arg # = %2d, words = %2d}, %4s, 0x%.8x, %d )\n\n",
2719 cum
->gp_reg_found
, cum
->arg_number
, cum
->arg_words
, GET_MODE_NAME (mode
),
2729 if (GET_MODE_CLASS (mode
) != MODE_COMPLEX_INT
2730 && GET_MODE_CLASS (mode
) != MODE_COMPLEX_FLOAT
)
2732 cum
->gp_reg_found
= 1;
2733 cum
->arg_words
+= ((GET_MODE_SIZE (mode
) + UNITS_PER_WORD
- 1)
2738 cum
->gp_reg_found
= 1;
2739 cum
->arg_words
+= ((int_size_in_bytes (type
) + UNITS_PER_WORD
- 1)
2748 cum
->arg_words
+= (TARGET_64BIT
? 1 : 2);
2752 cum
->gp_reg_found
= 1;
2753 cum
->arg_words
+= (TARGET_64BIT
? 1 : 2);
2759 cum
->gp_reg_found
= 1;
2765 /* Return an RTL expression containing the register for the given mode,
2766 or 0 if the argument is to be passed on the stack. */
2769 function_arg (cum
, mode
, type
, named
)
2770 CUMULATIVE_ARGS
*cum
; /* current arg information */
2771 enum machine_mode mode
; /* current arg mode */
2772 tree type
; /* type of the argument or 0 if lib support */
2773 int named
; /* != 0 for normal args, == 0 for ... args */
2778 int struct_p
= ((type
!= (tree
)0)
2779 && (TREE_CODE (type
) == RECORD_TYPE
2780 || TREE_CODE (type
) == UNION_TYPE
));
2782 if (TARGET_DEBUG_E_MODE
)
2784 "function_arg( {gp reg found = %d, arg # = %2d, words = %2d}, %4s, 0x%.8x, %d ) = ",
2785 cum
->gp_reg_found
, cum
->arg_number
, cum
->arg_words
, GET_MODE_NAME (mode
),
2791 if (cum
->gp_reg_found
|| cum
->arg_number
>= 2 || TARGET_SOFT_FLOAT
)
2792 regbase
= GP_ARG_FIRST
;
2795 regbase
= FP_ARG_FIRST
;
2796 /* If the first arg was a float in a floating point register,
2797 then set bias to align this float arg properly. */
2798 if (cum
->arg_words
== 1)
2806 cum
->arg_words
+= (cum
->arg_words
& 1);
2807 regbase
= (cum
->gp_reg_found
|| TARGET_SOFT_FLOAT
|| cum
->arg_number
>= 2
2813 if (GET_MODE_CLASS (mode
) != MODE_COMPLEX_INT
2814 && GET_MODE_CLASS (mode
) != MODE_COMPLEX_FLOAT
)
2817 /* Drops through. */
2819 if (type
!= (tree
)0 && TYPE_ALIGN (type
) > BITS_PER_WORD
2821 cum
->arg_words
+= (cum
->arg_words
& 1);
2823 regbase
= GP_ARG_FIRST
;
2830 regbase
= GP_ARG_FIRST
;
2835 cum
->arg_words
+= (cum
->arg_words
& 1);
2836 regbase
= GP_ARG_FIRST
;
2839 if (cum
->arg_words
>= MAX_ARGS_IN_REGISTERS
)
2841 if (TARGET_DEBUG_E_MODE
)
2842 fprintf (stderr
, "<stack>%s\n", struct_p
? ", [struct]" : "");
2851 ret
= gen_rtx (REG
, mode
, regbase
+ cum
->arg_words
+ bias
);
2853 if (TARGET_DEBUG_E_MODE
)
2854 fprintf (stderr
, "%s%s\n", reg_names
[regbase
+ cum
->arg_words
+ bias
],
2855 struct_p
? ", [struct]" : "");
2857 /* The following is a hack in order to pass 1 byte structures
2858 the same way that the MIPS compiler does (namely by passing
2859 the structure in the high byte or half word of the register).
2860 This also makes varargs work. If we have such a structure,
2861 we save the adjustment RTL, and the call define expands will
2862 emit them. For the VOIDmode argument (argument after the
2863 last real argument), pass back a parallel vector holding each
2864 of the adjustments. */
2866 /* ??? function_arg can be called more than once for each argument.
2867 As a result, we compute more adjustments than we need here.
2868 See the CUMULATIVE_ARGS definition in mips.h. */
2870 /* ??? This scheme requires everything smaller than the word size to
2871 shifted to the left, but when TARGET_64BIT and ! TARGET_INT64,
2872 that would mean every int needs to be shifted left, which is very
2873 inefficient. Let's not carry this compatibility to the 64 bit
2874 calling convention for now. */
2876 if (struct_p
&& int_size_in_bytes (type
) < UNITS_PER_WORD
2879 rtx amount
= GEN_INT (BITS_PER_WORD
2880 - int_size_in_bytes (type
) * BITS_PER_UNIT
);
2881 rtx reg
= gen_rtx (REG
, word_mode
, regbase
+ cum
->arg_words
+ bias
);
2883 cum
->adjust
[ cum
->num_adjusts
++ ] = gen_ashldi3 (reg
, reg
, amount
);
2885 cum
->adjust
[ cum
->num_adjusts
++ ] = gen_ashlsi3 (reg
, reg
, amount
);
2889 if (mode
== VOIDmode
&& cum
->num_adjusts
> 0)
2890 ret
= gen_rtx (PARALLEL
, VOIDmode
, gen_rtvec_v (cum
->num_adjusts
, cum
->adjust
));
2897 function_arg_partial_nregs (cum
, mode
, type
, named
)
2898 CUMULATIVE_ARGS
*cum
; /* current arg information */
2899 enum machine_mode mode
; /* current arg mode */
2900 tree type
; /* type of the argument or 0 if lib support */
2901 int named
; /* != 0 for normal args, == 0 for ... args */
2903 if ((mode
== BLKmode
2904 || GET_MODE_CLASS (mode
) != MODE_COMPLEX_INT
2905 || GET_MODE_CLASS (mode
) != MODE_COMPLEX_FLOAT
)
2906 && cum
->arg_words
< MAX_ARGS_IN_REGISTERS
)
2909 if (mode
== BLKmode
)
2910 words
= ((int_size_in_bytes (type
) + UNITS_PER_WORD
- 1)
2913 words
= (GET_MODE_SIZE (mode
) + UNITS_PER_WORD
- 1) / UNITS_PER_WORD
;
2915 if (words
+ cum
->arg_words
<= MAX_ARGS_IN_REGISTERS
)
2916 return 0; /* structure fits in registers */
2918 if (TARGET_DEBUG_E_MODE
)
2919 fprintf (stderr
, "function_arg_partial_nregs = %d\n",
2920 MAX_ARGS_IN_REGISTERS
- cum
->arg_words
);
2922 return MAX_ARGS_IN_REGISTERS
- cum
->arg_words
;
2925 else if (mode
== DImode
&& cum
->arg_words
== MAX_ARGS_IN_REGISTERS
-1
2928 if (TARGET_DEBUG_E_MODE
)
2929 fprintf (stderr
, "function_arg_partial_nregs = 1\n");
2938 /* Print the options used in the assembly file. */
2940 static struct {char *name
; int value
;} target_switches
[]
2951 int mask
= TARGET_DEFAULT
;
2953 /* Allow assembly language comparisons with -mdebug eliminating the
2954 compiler version number and switch lists. */
2956 if (TARGET_DEBUG_MODE
)
2959 fprintf (out
, "\n # %s %s", language_string
, version_string
);
2960 #ifdef TARGET_VERSION_INTERNAL
2961 TARGET_VERSION_INTERNAL (out
);
2964 fprintf (out
, " compiled by GNU C\n\n");
2966 fprintf (out
, " compiled by CC\n\n");
2969 fprintf (out
, " # Cc1 defaults:");
2971 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
2973 if (target_switches
[j
].name
[0] != '\0'
2974 && target_switches
[j
].value
> 0
2975 && (target_switches
[j
].value
& mask
) == target_switches
[j
].value
)
2977 mask
&= ~ target_switches
[j
].value
;
2978 len
= strlen (target_switches
[j
].name
) + 1;
2979 if (len
+ line_len
> 79)
2982 fputs ("\n #", out
);
2984 fprintf (out
, " -m%s", target_switches
[j
].name
);
2989 fprintf (out
, "\n\n # Cc1 arguments (-G value = %d, Cpu = %s, ISA = %d):",
2990 mips_section_threshold
, mips_cpu_string
, mips_isa
);
2993 for (p
= &save_argv
[1]; *p
!= (char *)0; p
++)
2998 len
= strlen (arg
) + 1;
2999 if (len
+ line_len
> 79)
3002 fputs ("\n #", out
);
3004 fprintf (out
, " %s", *p
);
3009 fputs ("\n\n", out
);
3013 /* Abort after printing out a specific insn. */
3016 abort_with_insn (insn
, reason
)
3025 /* Write a message to stderr (for use in macros expanded in files that do not
3026 include stdio.h). */
3032 fprintf (stderr
, s
, s1
, s2
);
3042 fprintf (stderr
, "compiling '%s' in '%s'\n",
3043 (current_function_name
!= (char *)0) ? current_function_name
: "<toplevel>",
3044 (current_function_file
!= (char *)0) ? current_function_file
: "<no file>");
3047 #endif /* SIGINFO */
3050 /* Set up the threshold for data to go into the small data area, instead
3051 of the normal data area, and detect any conflicts in the switches. */
3056 register int i
, start
;
3058 register enum machine_mode mode
;
3060 mips_section_threshold
= (g_switch_set
) ? g_switch_value
: MIPS_DEFAULT_GVALUE
;
3062 if (mips_section_threshold
<= 0)
3063 target_flags
&= ~MASK_GPOPT
;
3065 target_flags
|= MASK_GPOPT
;
3067 /* Get the architectural level. */
3068 if (mips_isa_string
== (char *)0)
3070 #ifdef MIPS_ISA_DEFAULT
3071 mips_isa
= MIPS_ISA_DEFAULT
;
3077 else if (isdigit (*mips_isa_string
))
3079 mips_isa
= atoi (mips_isa_string
);
3080 if (mips_isa
< 1 || mips_isa
> 3)
3082 error ("-mips%d not supported", mips_isa
);
3089 error ("bad value (%s) for -mips switch", mips_isa_string
);
3093 /* Identify the processor type */
3094 if (mips_cpu_string
== (char *)0
3095 || !strcmp (mips_cpu_string
, "default")
3096 || !strcmp (mips_cpu_string
, "DEFAULT"))
3101 mips_cpu_string
= "3000";
3102 mips_cpu
= PROCESSOR_R3000
;
3105 mips_cpu_string
= "6000";
3106 mips_cpu
= PROCESSOR_R6000
;
3109 mips_cpu_string
= "4000";
3110 mips_cpu
= PROCESSOR_R4000
;
3117 char *p
= mips_cpu_string
;
3119 if (*p
== 'r' || *p
== 'R')
3122 /* Since there is no difference between a R2000 and R3000 in
3123 terms of the scheduler, we collapse them into just an R3000. */
3125 mips_cpu
= PROCESSOR_DEFAULT
;
3129 if (!strcmp (p
, "2000") || !strcmp (p
, "2k") || !strcmp (p
, "2K"))
3130 mips_cpu
= PROCESSOR_R3000
;
3134 if (!strcmp (p
, "3000") || !strcmp (p
, "3k") || !strcmp (p
, "3K"))
3135 mips_cpu
= PROCESSOR_R3000
;
3139 if (!strcmp (p
, "4000") || !strcmp (p
, "4k") || !strcmp (p
, "4K"))
3140 mips_cpu
= PROCESSOR_R4000
;
3141 /* The r4400 is exactly the same as the r4000 from the compiler's
3143 else if (!strcmp (p
, "4400"))
3144 mips_cpu
= PROCESSOR_R4000
;
3145 else if (!strcmp (p
, "4600"))
3146 mips_cpu
= PROCESSOR_R4600
;
3150 if (!strcmp (p
, "6000") || !strcmp (p
, "6k") || !strcmp (p
, "6K"))
3151 mips_cpu
= PROCESSOR_R6000
;
3155 if (!strcmp (p
, "orion"))
3156 mips_cpu
= PROCESSOR_R4600
;
3160 if (mips_cpu
== PROCESSOR_DEFAULT
)
3162 error ("bad value (%s) for -mcpu= switch", mips_cpu_string
);
3163 mips_cpu_string
= "default";
3167 if ((mips_cpu
== PROCESSOR_R3000
&& mips_isa
> 1)
3168 || (mips_cpu
== PROCESSOR_R6000
&& mips_isa
> 2))
3169 error ("-mcpu=%s does not support -mips%d", mips_cpu_string
, mips_isa
);
3171 /* make sure sizes of ints/longs/etc. are ok */
3175 fatal ("Only MIPS-III CPUs can support 64 bit ints");
3177 else if (TARGET_LONG64
)
3178 fatal ("Only MIPS-III CPUs can support 64 bit longs");
3180 else if (TARGET_FLOAT64
)
3181 fatal ("Only MIPS-III CPUs can support 64 bit fp registers");
3183 else if (TARGET_64BIT
)
3184 fatal ("Only MIPS-III CPUs can support 64 bit gp registers");
3187 /* Tell halfpic.c that we have half-pic code if we do. */
3188 if (TARGET_HALF_PIC
)
3191 /* -fpic (-KPIC) is the default when TARGET_ABICALLS is defined. We need
3192 to set flag_pic so that the LEGITIMATE_PIC_OPERAND_P macro will work. */
3193 /* ??? -non_shared turns off pic code generation, but this is not
3195 if (TARGET_ABICALLS
)
3197 mips_abicalls
= MIPS_ABICALLS_YES
;
3199 if (mips_section_threshold
> 0)
3200 warning ("-G is incompatible with PIC code which is the default");
3203 mips_abicalls
= MIPS_ABICALLS_NO
;
3205 /* -membedded-pic is a form of PIC code suitable for embedded
3206 systems. All calls are made using PC relative addressing, and
3207 all data is addressed using the $gp register. This requires gas,
3208 which does most of the work, and GNU ld, which automatically
3209 expands PC relative calls which are out of range into a longer
3210 instruction sequence. All gcc really does differently is
3211 generate a different sequence for a switch. */
3212 if (TARGET_EMBEDDED_PIC
)
3215 if (TARGET_ABICALLS
)
3216 warning ("-membedded-pic and -mabicalls are incompatible");
3218 warning ("-G and -membedded-pic are incompatible");
3219 /* Setting mips_section_threshold is not required, because gas
3220 will force everything to be GP addressable anyhow, but
3221 setting it will cause gcc to make better estimates of the
3222 number of instructions required to access a particular data
3224 mips_section_threshold
= 0x7fffffff;
3227 /* -mrnames says to use the MIPS software convention for register
3228 names instead of the hardware names (ie, $a0 instead of $4).
3229 We do this by switching the names in mips_reg_names, which the
3230 reg_names points into via the REGISTER_NAMES macro. */
3232 if (TARGET_NAME_REGS
)
3233 bcopy ((char *) mips_sw_reg_names
, (char *) mips_reg_names
, sizeof (mips_reg_names
));
3235 /* If this is OSF/1, set up a SIGINFO handler so we can see what function
3236 is currently being compiled. */
3238 if (getenv ("GCC_SIGINFO") != (char *)0)
3240 struct sigaction action
;
3241 action
.sa_handler
= siginfo
;
3243 action
.sa_flags
= SA_RESTART
;
3244 sigaction (SIGINFO
, &action
, (struct sigaction
*)0);
3249 #if defined(ultrix) || defined(__ultrix) || defined(__OSF1__) || defined(__osf__) || defined(osf)
3250 /* If -mstats and -quiet, make stderr line buffered. */
3251 if (quiet_flag
&& TARGET_STATS
)
3252 setvbuf (stderr
, (char *)0, _IOLBF
, BUFSIZ
);
3256 /* Initialize the high and low values for legitimate floating point
3257 constants. Rather than trying to get the accuracy down to the
3258 last bit, just use approximate ranges. */
3259 dfhigh
= REAL_VALUE_ATOF ("1.0e300", DFmode
);
3260 dflow
= REAL_VALUE_ATOF ("1.0e-300", DFmode
);
3261 sfhigh
= REAL_VALUE_ATOF ("1.0e38", SFmode
);
3262 sflow
= REAL_VALUE_ATOF ("1.0e-38", SFmode
);
3264 mips_print_operand_punct
['?'] = TRUE
;
3265 mips_print_operand_punct
['#'] = TRUE
;
3266 mips_print_operand_punct
['&'] = TRUE
;
3267 mips_print_operand_punct
['!'] = TRUE
;
3268 mips_print_operand_punct
['*'] = TRUE
;
3269 mips_print_operand_punct
['@'] = TRUE
;
3270 mips_print_operand_punct
['.'] = TRUE
;
3271 mips_print_operand_punct
['('] = TRUE
;
3272 mips_print_operand_punct
[')'] = TRUE
;
3273 mips_print_operand_punct
['['] = TRUE
;
3274 mips_print_operand_punct
[']'] = TRUE
;
3275 mips_print_operand_punct
['<'] = TRUE
;
3276 mips_print_operand_punct
['>'] = TRUE
;
3277 mips_print_operand_punct
['{'] = TRUE
;
3278 mips_print_operand_punct
['}'] = TRUE
;
3279 mips_print_operand_punct
['^'] = TRUE
;
3281 mips_char_to_class
['d'] = GR_REGS
;
3282 mips_char_to_class
['f'] = ((TARGET_HARD_FLOAT
) ? FP_REGS
: NO_REGS
);
3283 mips_char_to_class
['h'] = HI_REG
;
3284 mips_char_to_class
['l'] = LO_REG
;
3285 mips_char_to_class
['x'] = MD_REGS
;
3286 mips_char_to_class
['y'] = GR_REGS
;
3287 mips_char_to_class
['z'] = ST_REGS
;
3289 /* Set up array to map GCC register number to debug register number.
3290 Ignore the special purpose register numbers. */
3292 for (i
= 0; i
< FIRST_PSEUDO_REGISTER
; i
++)
3293 mips_dbx_regno
[i
] = -1;
3295 start
= GP_DBX_FIRST
- GP_REG_FIRST
;
3296 for (i
= GP_REG_FIRST
; i
<= GP_REG_LAST
; i
++)
3297 mips_dbx_regno
[i
] = i
+ start
;
3299 start
= FP_DBX_FIRST
- FP_REG_FIRST
;
3300 for (i
= FP_REG_FIRST
; i
<= FP_REG_LAST
; i
++)
3301 mips_dbx_regno
[i
] = i
+ start
;
3303 /* Set up array giving whether a given register can hold a given mode.
3304 At present, restrict ints from being in FP registers, because reload
3305 is a little enthusiastic about storing extra values in FP registers,
3306 and this is not good for things like OS kernels. Also, due to the
3307 mandatory delay, it is as fast to load from cached memory as to move
3308 from the FP register. */
3310 for (mode
= VOIDmode
;
3311 mode
!= MAX_MACHINE_MODE
;
3312 mode
= (enum machine_mode
)((int)mode
+ 1))
3314 register int size
= GET_MODE_SIZE (mode
);
3315 register enum mode_class
class = GET_MODE_CLASS (mode
);
3317 for (regno
= 0; regno
< FIRST_PSEUDO_REGISTER
; regno
++)
3321 if (mode
== CC_FPmode
|| mode
== CC_REV_FPmode
)
3322 temp
= (regno
== FPSW_REGNUM
);
3324 else if (GP_REG_P (regno
))
3325 temp
= ((regno
& 1) == 0 || (size
<= UNITS_PER_WORD
));
3327 else if (FP_REG_P (regno
))
3328 temp
= ((TARGET_FLOAT64
|| ((regno
& 1) == 0))
3329 && (class == MODE_FLOAT
3330 || class == MODE_COMPLEX_FLOAT
3331 || (TARGET_DEBUG_H_MODE
&& class == MODE_INT
)));
3333 else if (MD_REG_P (regno
))
3336 temp
= (mode
== DImode
3337 || (regno
== MD_REG_FIRST
&& mode
== TImode
));
3339 temp
= (mode
== SImode
3340 || (regno
== MD_REG_FIRST
&& mode
== DImode
));
3346 mips_hard_regno_mode_ok
[(int)mode
][regno
] = temp
;
3353 * The MIPS debug format wants all automatic variables and arguments
3354 * to be in terms of the virtual frame pointer (stack pointer before
3355 * any adjustment in the function), while the MIPS 3.0 linker wants
3356 * the frame pointer to be the stack pointer after the initial
3357 * adjustment. So, we do the adjustment here. The arg pointer (which
3358 * is eliminated) points to the virtual frame pointer, while the frame
3359 * pointer (which may be eliminated) points to the stack pointer after
3360 * the initial adjustments.
3364 mips_debugger_offset (addr
, offset
)
3368 rtx offset2
= const0_rtx
;
3369 rtx reg
= eliminate_constant_term (addr
, &offset2
);
3372 offset
= INTVAL (offset2
);
3374 if (reg
== stack_pointer_rtx
|| reg
== frame_pointer_rtx
)
3376 int frame_size
= (!current_frame_info
.initialized
)
3377 ? compute_frame_size (get_frame_size ())
3378 : current_frame_info
.total_size
;
3380 offset
= offset
- frame_size
;
3382 /* sdbout_parms does not want this to crash for unrecognized cases. */
3384 else if (reg
!= arg_pointer_rtx
)
3385 abort_with_insn (addr
, "mips_debugger_offset called with non stack/frame/arg pointer.");
3392 /* A C compound statement to output to stdio stream STREAM the
3393 assembler syntax for an instruction operand X. X is an RTL
3396 CODE is a value that can be used to specify one of several ways
3397 of printing the operand. It is used when identical operands
3398 must be printed differently depending on the context. CODE
3399 comes from the `%' specification that was used to request
3400 printing of the operand. If the specification was just `%DIGIT'
3401 then CODE is 0; if the specification was `%LTR DIGIT' then CODE
3402 is the ASCII code for LTR.
3404 If X is a register, this macro should print the register's name.
3405 The names can be found in an array `reg_names' whose type is
3406 `char *[]'. `reg_names' is initialized from `REGISTER_NAMES'.
3408 When the machine description has a specification `%PUNCT' (a `%'
3409 followed by a punctuation character), this macro is called with
3410 a null pointer for X and the punctuation character for CODE.
3412 The MIPS specific codes are:
3414 'X' X is CONST_INT, prints 32 bits in hexadecimal format = "0x%08x",
3415 'x' X is CONST_INT, prints 16 bits in hexadecimal format = "0x%04x",
3416 'd' output integer constant in decimal,
3417 'z' if the operand is 0, use $0 instead of normal operand.
3418 'D' print second register of double-word register operand.
3419 'L' print low-order register of double-word register operand.
3420 'M' print high-order register of double-word register operand.
3421 'C' print part of opcode for a branch condition.
3422 'N' print part of opcode for a branch condition, inverted.
3423 'S' X is CODE_LABEL, print with prefix of "LS" (for embedded switch).
3424 '(' Turn on .set noreorder
3425 ')' Turn on .set reorder
3426 '[' Turn on .set noat
3428 '<' Turn on .set nomacro
3429 '>' Turn on .set macro
3430 '{' Turn on .set volatile (not GAS)
3431 '}' Turn on .set novolatile (not GAS)
3432 '&' Turn on .set noreorder if filling delay slots
3433 '*' Turn on both .set noreorder and .set nomacro if filling delay slots
3434 '!' Turn on .set nomacro if filling delay slots
3435 '#' Print nop if in a .set noreorder section.
3436 '?' Print 'l' if we are to use a branch likely instead of normal branch.
3437 '@' Print the name of the assembler temporary register (at or $1).
3438 '.' Print the name of the register with a hard-wired zero (zero or $0).
3439 '^' Print the name of the pic call-through register (t9 or $25). */
3442 print_operand (file
, op
, letter
)
3443 FILE *file
; /* file to write to */
3444 rtx op
; /* operand to print */
3445 int letter
; /* %<letter> or 0 */
3447 register enum rtx_code code
;
3449 if (PRINT_OPERAND_PUNCT_VALID_P (letter
))
3454 error ("PRINT_OPERAND: Unknown punctuation '%c'", letter
);
3458 if (mips_branch_likely
)
3463 fputs (reg_names
[GP_REG_FIRST
+ 1], file
);
3467 fputs (reg_names
[PIC_FUNCTION_ADDR_REGNUM
], file
);
3471 fputs (reg_names
[GP_REG_FIRST
+ 0], file
);
3475 if (final_sequence
!= 0 && set_noreorder
++ == 0)
3476 fputs (".set\tnoreorder\n\t", file
);
3480 if (final_sequence
!= 0)
3482 if (set_noreorder
++ == 0)
3483 fputs (".set\tnoreorder\n\t", file
);
3485 if (set_nomacro
++ == 0)
3486 fputs (".set\tnomacro\n\t", file
);
3491 if (final_sequence
!= 0 && set_nomacro
++ == 0)
3492 fputs ("\n\t.set\tnomacro", file
);
3496 if (set_noreorder
!= 0)
3497 fputs ("\n\tnop", file
);
3499 else if (TARGET_STATS
)
3500 fputs ("\n\t#nop", file
);
3505 if (set_noreorder
++ == 0)
3506 fputs (".set\tnoreorder\n\t", file
);
3510 if (set_noreorder
== 0)
3511 error ("internal error: %%) found without a %%( in assembler pattern");
3513 else if (--set_noreorder
== 0)
3514 fputs ("\n\t.set\treorder", file
);
3519 if (set_noat
++ == 0)
3520 fputs (".set\tnoat\n\t", file
);
3525 error ("internal error: %%] found without a %%[ in assembler pattern");
3527 else if (--set_noat
== 0)
3528 fputs ("\n\t.set\tat", file
);
3533 if (set_nomacro
++ == 0)
3534 fputs (".set\tnomacro\n\t", file
);
3538 if (set_nomacro
== 0)
3539 error ("internal error: %%> found without a %%< in assembler pattern");
3541 else if (--set_nomacro
== 0)
3542 fputs ("\n\t.set\tmacro", file
);
3547 if (set_volatile
++ == 0)
3548 fprintf (file
, "%s.set\tvolatile\n\t", (TARGET_MIPS_AS
) ? "" : "#");
3552 if (set_volatile
== 0)
3553 error ("internal error: %%} found without a %%{ in assembler pattern");
3555 else if (--set_volatile
== 0)
3556 fprintf (file
, "\n\t%s.set\tnovolatile", (TARGET_MIPS_AS
) ? "" : "#");
3565 error ("PRINT_OPERAND null pointer");
3569 code
= GET_CODE (op
);
3573 case EQ
: fputs ("eq", file
); break;
3574 case NE
: fputs ("ne", file
); break;
3575 case GT
: fputs ("gt", file
); break;
3576 case GE
: fputs ("ge", file
); break;
3577 case LT
: fputs ("lt", file
); break;
3578 case LE
: fputs ("le", file
); break;
3579 case GTU
: fputs ("gtu", file
); break;
3580 case GEU
: fputs ("geu", file
); break;
3581 case LTU
: fputs ("ltu", file
); break;
3582 case LEU
: fputs ("leu", file
); break;
3585 abort_with_insn (op
, "PRINT_OPERAND, illegal insn for %%C");
3588 else if (letter
== 'N')
3591 case EQ
: fputs ("ne", file
); break;
3592 case NE
: fputs ("eq", file
); break;
3593 case GT
: fputs ("le", file
); break;
3594 case GE
: fputs ("lt", file
); break;
3595 case LT
: fputs ("ge", file
); break;
3596 case LE
: fputs ("gt", file
); break;
3597 case GTU
: fputs ("leu", file
); break;
3598 case GEU
: fputs ("ltu", file
); break;
3599 case LTU
: fputs ("geu", file
); break;
3600 case LEU
: fputs ("gtu", file
); break;
3603 abort_with_insn (op
, "PRINT_OPERAND, illegal insn for %%N");
3606 else if (letter
== 'S')
3610 ASM_GENERATE_INTERNAL_LABEL (buffer
, "LS", CODE_LABEL_NUMBER (op
));
3611 assemble_name (file
, buffer
);
3614 else if (code
== REG
)
3616 register int regnum
= REGNO (op
);
3619 regnum
+= MOST_SIGNIFICANT_WORD
;
3621 else if (letter
== 'L')
3622 regnum
+= LEAST_SIGNIFICANT_WORD
;
3624 else if (letter
== 'D')
3627 fprintf (file
, "%s", reg_names
[regnum
]);
3630 else if (code
== MEM
)
3631 output_address (XEXP (op
, 0));
3633 else if (code
== CONST_DOUBLE
)
3638 REAL_VALUE_FROM_CONST_DOUBLE (d
, op
);
3639 REAL_VALUE_TO_DECIMAL (d
, "%.20e", s
);
3643 else if ((letter
== 'x') && (GET_CODE(op
) == CONST_INT
))
3644 fprintf (file
, "0x%04x", 0xffff & (INTVAL(op
)));
3646 else if ((letter
== 'X') && (GET_CODE(op
) == CONST_INT
))
3647 fprintf (file
, "0x%08x", INTVAL(op
));
3649 else if ((letter
== 'd') && (GET_CODE(op
) == CONST_INT
))
3650 fprintf (file
, "%d", (INTVAL(op
)));
3652 else if (letter
== 'z'
3653 && (GET_CODE (op
) == CONST_INT
)
3654 && INTVAL (op
) == 0)
3655 fputs (reg_names
[GP_REG_FIRST
], file
);
3657 else if (letter
== 'd' || letter
== 'x' || letter
== 'X')
3658 fatal ("PRINT_OPERAND: letter %c was found & insn was not CONST_INT", letter
);
3661 output_addr_const (file
, op
);
3665 /* A C compound statement to output to stdio stream STREAM the
3666 assembler syntax for an instruction operand that is a memory
3667 reference whose address is ADDR. ADDR is an RTL expression.
3669 On some machines, the syntax for a symbolic address depends on
3670 the section that the address refers to. On these machines,
3671 define the macro `ENCODE_SECTION_INFO' to store the information
3672 into the `symbol_ref', and then check for it here. */
3675 print_operand_address (file
, addr
)
3680 error ("PRINT_OPERAND_ADDRESS, null pointer");
3683 switch (GET_CODE (addr
))
3686 abort_with_insn (addr
, "PRINT_OPERAND_ADDRESS, illegal insn #1");
3690 if (REGNO (addr
) == ARG_POINTER_REGNUM
)
3691 abort_with_insn (addr
, "Arg pointer not eliminated.");
3693 fprintf (file
, "0(%s)", reg_names
[REGNO (addr
)]);
3698 register rtx reg
= (rtx
)0;
3699 register rtx offset
= (rtx
)0;
3700 register rtx arg0
= XEXP (addr
, 0);
3701 register rtx arg1
= XEXP (addr
, 1);
3703 if (GET_CODE (arg0
) == REG
)
3707 if (GET_CODE (offset
) == REG
)
3708 abort_with_insn (addr
, "PRINT_OPERAND_ADDRESS, 2 regs");
3710 else if (GET_CODE (arg1
) == REG
)
3715 else if (CONSTANT_P (arg0
) && CONSTANT_P (arg1
))
3717 output_addr_const (file
, addr
);
3721 abort_with_insn (addr
, "PRINT_OPERAND_ADDRESS, no regs");
3723 if (!CONSTANT_P (offset
))
3724 abort_with_insn (addr
, "PRINT_OPERAND_ADDRESS, illegal insn #2");
3726 if (REGNO (reg
) == ARG_POINTER_REGNUM
)
3727 abort_with_insn (addr
, "Arg pointer not eliminated.");
3729 output_addr_const (file
, offset
);
3730 fprintf (file
, "(%s)", reg_names
[REGNO (reg
)]);
3738 output_addr_const (file
, addr
);
3744 /* If optimizing for the global pointer, keep track of all of
3745 the externs, so that at the end of the file, we can emit
3746 the appropriate .extern declaration for them, before writing
3747 out the text section. We assume that all names passed to
3748 us are in the permanent obstack, so that they will be valid
3749 at the end of the compilation.
3751 If we have -G 0, or the extern size is unknown, don't bother
3752 emitting the .externs. */
3755 mips_output_external (file
, decl
, name
)
3760 register struct extern_list
*p
;
3764 && ((TREE_CODE (decl
)) != FUNCTION_DECL
)
3765 && ((len
= int_size_in_bytes (TREE_TYPE (decl
))) > 0))
3767 p
= (struct extern_list
*)permalloc ((long) sizeof (struct extern_list
));
3768 p
->next
= extern_head
;
3777 /* Compute a string to use as a temporary file name. */
3779 /* On MSDOS, write temp files in current dir
3780 because there's no place else we can expect to use. */
3783 #define P_tmpdir "./"
3791 char *base
= getenv ("TMPDIR");
3794 if (base
== (char *)0)
3797 if (access (P_tmpdir
, R_OK
| W_OK
) == 0)
3801 if (access ("/usr/tmp", R_OK
| W_OK
) == 0)
3807 len
= strlen (base
);
3808 /* temp_filename is global, so we must use malloc, not alloca. */
3809 temp_filename
= (char *) xmalloc (len
+ sizeof("/ctXXXXXX"));
3810 strcpy (temp_filename
, base
);
3811 if (len
> 0 && temp_filename
[len
-1] != '/')
3812 temp_filename
[len
++] = '/';
3814 strcpy (temp_filename
+ len
, "ctXXXXXX");
3815 mktemp (temp_filename
);
3817 stream
= fopen (temp_filename
, "w+");
3819 pfatal_with_name (temp_filename
);
3822 /* In MSDOS, we cannot unlink the temporary file until we are finished using
3823 it. Otherwise, we delete it now, so that it will be gone even if the
3824 compiler happens to crash. */
3825 unlink (temp_filename
);
3831 /* Emit a new filename to a stream. If this is MIPS ECOFF, watch out
3832 for .file's that start within a function. If we are smuggling stabs, try to
3833 put out a MIPS ECOFF file and a stab. */
3836 mips_output_filename (stream
, name
)
3840 static int first_time
= TRUE
;
3841 char ltext_label_name
[100];
3847 current_function_file
= name
;
3848 fprintf (stream
, "\t.file\t%d ", num_source_filenames
);
3849 output_quoted_string (stream
, name
);
3850 fprintf (stream
, "\n");
3851 /* This tells mips-tfile that stabs will follow. */
3852 if (!TARGET_GAS
&& write_symbols
== DBX_DEBUG
)
3853 fprintf (stream
, "\t#@stabs\n");
3856 else if (write_symbols
== DBX_DEBUG
)
3858 ASM_GENERATE_INTERNAL_LABEL (ltext_label_name
, "Ltext", 0);
3859 fprintf (stream
, "%s ", ASM_STABS_OP
);
3860 output_quoted_string (stream
, name
);
3861 fprintf (stream
, ",%d,0,0,%s\n", N_SOL
, <ext_label_name
[1]);
3864 else if (name
!= current_function_file
3865 && strcmp (name
, current_function_file
) != 0)
3867 if (inside_function
&& !TARGET_GAS
)
3869 if (!file_in_function_warning
)
3871 file_in_function_warning
= TRUE
;
3872 ignore_line_number
= TRUE
;
3873 warning ("MIPS ECOFF format does not allow changing filenames within functions with #line");
3876 fprintf (stream
, "\t#.file\t%d ", num_source_filenames
);
3882 current_function_file
= name
;
3883 fprintf (stream
, "\t.file\t%d ", num_source_filenames
);
3885 output_quoted_string (stream
, name
);
3886 fprintf (stream
, "\n");
3891 /* Emit a linenumber. For encapsulated stabs, we need to put out a stab
3892 as well as a .loc, since it is possible that MIPS ECOFF might not be
3893 able to represent the location for inlines that come from a different
3897 mips_output_lineno (stream
, line
)
3901 if (write_symbols
== DBX_DEBUG
)
3904 fprintf (stream
, "$LM%d:\n\t%s %d,0,%d,$LM%d\n",
3905 sym_lineno
, ASM_STABN_OP
, N_SLINE
, line
, sym_lineno
);
3910 fprintf (stream
, "\n\t%s.loc\t%d %d\n",
3911 (ignore_line_number
) ? "#" : "",
3912 num_source_filenames
, line
);
3914 LABEL_AFTER_LOC (stream
);
3919 /* If defined, a C statement to be executed just prior to the
3920 output of assembler code for INSN, to modify the extracted
3921 operands so they will be output differently.
3923 Here the argument OPVEC is the vector containing the operands
3924 extracted from INSN, and NOPERANDS is the number of elements of
3925 the vector which contain meaningful data for this insn. The
3926 contents of this vector are what will be used to convert the
3927 insn template into assembler code, so you can change the
3928 assembler output by changing the contents of the vector.
3930 We use it to check if the current insn needs a nop in front of it
3931 because of load delays, and also to update the delay slot
3934 /* ??? There is no real need for this function, because it never actually
3935 emits a NOP anymore. */
3938 final_prescan_insn (insn
, opvec
, noperands
)
3943 if (dslots_number_nops
> 0)
3945 rtx pattern
= PATTERN (insn
);
3946 int length
= get_attr_length (insn
);
3948 /* Do we need to emit a NOP? */
3950 || (mips_load_reg
!= (rtx
)0 && reg_mentioned_p (mips_load_reg
, pattern
))
3951 || (mips_load_reg2
!= (rtx
)0 && reg_mentioned_p (mips_load_reg2
, pattern
))
3952 || (mips_load_reg3
!= (rtx
)0 && reg_mentioned_p (mips_load_reg3
, pattern
))
3953 || (mips_load_reg4
!= (rtx
)0 && reg_mentioned_p (mips_load_reg4
, pattern
)))
3954 fputs ("\t#nop\n", asm_out_file
);
3957 dslots_load_filled
++;
3959 while (--dslots_number_nops
> 0)
3960 fputs ("\t#nop\n", asm_out_file
);
3962 mips_load_reg
= (rtx
)0;
3963 mips_load_reg2
= (rtx
)0;
3964 mips_load_reg3
= (rtx
)0;
3965 mips_load_reg4
= (rtx
)0;
3970 enum rtx_code code
= GET_CODE (insn
);
3971 if (code
== JUMP_INSN
|| code
== CALL_INSN
)
3972 dslots_jump_total
++;
3977 /* Output at beginning of assembler file.
3978 If we are optimizing to use the global pointer, create a temporary
3979 file to hold all of the text stuff, and write it out to the end.
3980 This is needed because the MIPS assembler is evidently one pass,
3981 and if it hasn't seen the relevant .comm/.lcomm/.extern/.sdata
3982 declaration when the code is processed, it generates a two
3983 instruction sequence. */
3986 mips_asm_file_start (stream
)
3989 ASM_OUTPUT_SOURCE_FILENAME (stream
, main_input_filename
);
3991 /* Versions of the MIPS assembler before 2.20 generate errors
3992 if a branch inside of a .set noreorder section jumps to a
3993 label outside of the .set noreorder section. Revision 2.20
3994 just set nobopt silently rather than fixing the bug. */
3996 if (TARGET_MIPS_AS
&& optimize
&& flag_delayed_branch
)
3997 fprintf (stream
, "\t.set\tnobopt\n");
3999 /* Generate the pseudo ops that System V.4 wants. */
4000 #ifndef ABICALLS_ASM_OP
4001 #define ABICALLS_ASM_OP ".abicalls"
4003 if (TARGET_ABICALLS
)
4004 /* ??? but do not want this (or want pic0) if -non-shared? */
4005 fprintf (stream
, "\t%s\n", ABICALLS_ASM_OP
);
4007 /* This code exists so that we can put all externs before all symbol
4008 references. This is necessary for the assembler's global pointer
4009 optimizations to work. */
4010 /* ??? Current versions of gas do not require that externs occur before
4011 symbol references. This means that this code is unnecessary when
4012 gas is being used. This gas feature hasn't been well tested as yet
4016 asm_out_data_file
= stream
;
4017 asm_out_text_file
= make_temp_file ();
4020 asm_out_data_file
= asm_out_text_file
= stream
;
4022 print_options (stream
);
4026 /* If we are optimizing the global pointer, emit the text section now
4027 and any small externs which did not have .comm, etc that are
4028 needed. Also, give a warning if the data area is more than 32K and
4029 -pic because 3 instructions are needed to reference the data
4033 mips_asm_file_end (file
)
4038 struct extern_list
*p
;
4042 HALF_PIC_FINISH (file
);
4049 for (p
= extern_head
; p
!= 0; p
= p
->next
)
4051 name_tree
= get_identifier (p
->name
);
4053 /* Positively ensure only one .extern for any given symbol. */
4054 if (! TREE_ASM_WRITTEN (name_tree
))
4056 TREE_ASM_WRITTEN (name_tree
) = 1;
4057 fputs ("\t.extern\t", file
);
4058 assemble_name (file
, p
->name
);
4059 fprintf (file
, ", %d\n", p
->size
);
4063 fprintf (file
, "\n\t.text\n");
4064 rewind (asm_out_text_file
);
4065 if (ferror (asm_out_text_file
))
4066 fatal_io_error (temp_filename
);
4068 while ((len
= fread (buffer
, 1, sizeof (buffer
), asm_out_text_file
)) > 0)
4069 if (fwrite (buffer
, 1, len
, file
) != len
)
4070 pfatal_with_name (asm_file_name
);
4073 pfatal_with_name (temp_filename
);
4075 if (fclose (asm_out_text_file
) != 0)
4076 pfatal_with_name (temp_filename
);
4079 unlink (temp_filename
);
4085 /* Emit either a label, .comm, or .lcomm directive, and mark
4086 that the symbol is used, so that we don't emit an .extern
4087 for it in mips_asm_file_end. */
4090 mips_declare_object (stream
, name
, init_string
, final_string
, size
)
4097 fputs (init_string
, stream
); /* "", "\t.comm\t", or "\t.lcomm\t" */
4098 assemble_name (stream
, name
);
4099 fprintf (stream
, final_string
, size
); /* ":\n", ",%u\n", ",%u\n" */
4103 tree name_tree
= get_identifier (name
);
4104 TREE_ASM_WRITTEN (name_tree
) = 1;
4109 /* Output a double precision value to the assembler. If both the
4110 host and target are IEEE, emit the values in hex. */
4113 mips_output_double (stream
, value
)
4115 REAL_VALUE_TYPE value
;
4117 #ifdef REAL_VALUE_TO_TARGET_DOUBLE
4119 REAL_VALUE_TO_TARGET_DOUBLE (value
, value_long
);
4121 fprintf (stream
, "\t.word\t0x%08lx\t\t# %.20g\n\t.word\t0x%08lx\n",
4122 value_long
[0], value
, value_long
[1]);
4124 fprintf (stream
, "\t.double\t%.20g\n", value
);
4129 /* Output a single precision value to the assembler. If both the
4130 host and target are IEEE, emit the values in hex. */
4133 mips_output_float (stream
, value
)
4135 REAL_VALUE_TYPE value
;
4137 #ifdef REAL_VALUE_TO_TARGET_SINGLE
4139 REAL_VALUE_TO_TARGET_SINGLE (value
, value_long
);
4141 fprintf (stream
, "\t.word\t0x%08lx\t\t# %.12g (float)\n", value_long
, value
);
4143 fprintf (stream
, "\t.float\t%.12g\n", value
);
4148 /* Return TRUE if any register used in the epilogue is used. This to insure
4149 any insn put into the epilogue delay slots is safe. */
4152 epilogue_reg_mentioned_p (insn
)
4157 register enum rtx_code code
;
4163 if (GET_CODE (insn
) == LABEL_REF
)
4166 code
= GET_CODE (insn
);
4170 regno
= REGNO (insn
);
4171 if (regno
== STACK_POINTER_REGNUM
)
4174 if (regno
== FRAME_POINTER_REGNUM
&& frame_pointer_needed
)
4177 if (!call_used_regs
[regno
])
4180 if (regno
!= MIPS_TEMP1_REGNUM
&& regno
!= MIPS_TEMP2_REGNUM
)
4183 if (!current_frame_info
.initialized
)
4184 compute_frame_size (get_frame_size ());
4186 return (current_frame_info
.total_size
>= 32768);
4196 fmt
= GET_RTX_FORMAT (code
);
4197 for (i
= GET_RTX_LENGTH (code
) - 1; i
>= 0; i
--)
4202 for (j
= XVECLEN (insn
, i
) - 1; j
>= 0; j
--)
4203 if (epilogue_reg_mentioned_p (XVECEXP (insn
, i
, j
)))
4206 else if (fmt
[i
] == 'e' && epilogue_reg_mentioned_p (XEXP (insn
, i
)))
4214 /* When generating embedded PIC code we may need to get the address of
4215 the current function. We will need it if we take the address of
4216 any symbol in the .text section. */
4219 mips_finalize_pic ()
4223 if (! TARGET_EMBEDDED_PIC
)
4225 if (embedded_pic_fnaddr_rtx
== NULL
)
4230 emit_insn (gen_get_fnaddr (embedded_pic_fnaddr_rtx
,
4231 XEXP (DECL_RTL (current_function_decl
), 0)));
4233 seq
= gen_sequence ();
4235 emit_insn_after (seq
, get_insns ());
4237 embedded_pic_fnaddr_rtx
= NULL
;
4241 /* Return the bytes needed to compute the frame pointer from the current
4244 Mips stack frames look like:
4246 Before call After call
4247 +-----------------------+ +-----------------------+
4250 | caller's temps. | | caller's temps. |
4252 +-----------------------+ +-----------------------+
4254 | arguments on stack. | | arguments on stack. |
4256 +-----------------------+ +-----------------------+
4257 | 4 words to save | | 4 words to save |
4258 | arguments passed | | arguments passed |
4259 | in registers, even | | in registers, even |
4260 SP->| if not passed. | VFP->| if not passed. |
4261 +-----------------------+ +-----------------------+
4263 | fp register save |
4265 +-----------------------+
4267 | gp register save |
4269 +-----------------------+
4273 +-----------------------+
4275 | alloca allocations |
4277 +-----------------------+
4279 | GP save for V.4 abi |
4281 +-----------------------+
4283 | arguments on stack |
4285 +-----------------------+
4287 | arguments passed |
4288 | in registers, even |
4289 low SP->| if not passed. |
4290 memory +-----------------------+
4295 compute_frame_size (size
)
4296 int size
; /* # of var. bytes allocated */
4299 long total_size
; /* # bytes that the entire frame takes up */
4300 long var_size
; /* # bytes that variables take up */
4301 long args_size
; /* # bytes that outgoing arguments take up */
4302 long extra_size
; /* # extra bytes */
4303 long gp_reg_rounded
; /* # bytes needed to store gp after rounding */
4304 long gp_reg_size
; /* # bytes needed to store gp regs */
4305 long fp_reg_size
; /* # bytes needed to store fp regs */
4306 long mask
; /* mask of saved gp registers */
4307 long fmask
; /* mask of saved fp registers */
4308 int fp_inc
; /* 1 or 2 depending on the size of fp regs */
4309 long fp_bits
; /* bitmask to use for each fp register */
4315 extra_size
= MIPS_STACK_ALIGN (((TARGET_ABICALLS
) ? UNITS_PER_WORD
: 0));
4316 var_size
= MIPS_STACK_ALIGN (size
);
4317 args_size
= MIPS_STACK_ALIGN (current_function_outgoing_args_size
);
4319 /* The MIPS 3.0 linker does not like functions that dynamically
4320 allocate the stack and have 0 for STACK_DYNAMIC_OFFSET, since it
4321 looks like we are trying to create a second frame pointer to the
4322 function, so allocate some stack space to make it happy. */
4324 if (args_size
== 0 && current_function_calls_alloca
)
4325 args_size
= 4*UNITS_PER_WORD
;
4327 total_size
= var_size
+ args_size
+ extra_size
;
4329 /* Calculate space needed for gp registers. */
4330 for (regno
= GP_REG_FIRST
; regno
<= GP_REG_LAST
; regno
++)
4332 if (MUST_SAVE_REGISTER (regno
))
4334 gp_reg_size
+= UNITS_PER_WORD
;
4335 mask
|= 1L << (regno
- GP_REG_FIRST
);
4339 /* Calculate space needed for fp registers. */
4351 for (regno
= FP_REG_FIRST
; regno
<= FP_REG_LAST
; regno
+= fp_inc
)
4353 if (regs_ever_live
[regno
] && !call_used_regs
[regno
])
4355 fp_reg_size
+= fp_inc
* UNITS_PER_FPREG
;
4356 fmask
|= fp_bits
<< (regno
- FP_REG_FIRST
);
4360 gp_reg_rounded
= MIPS_STACK_ALIGN (gp_reg_size
);
4361 total_size
+= gp_reg_rounded
+ fp_reg_size
;
4363 if (total_size
== extra_size
)
4364 total_size
= extra_size
= 0;
4365 else if (TARGET_ABICALLS
)
4367 /* Add the context-pointer to the saved registers. */
4368 gp_reg_size
+= UNITS_PER_WORD
;
4369 mask
|= 1L << (PIC_OFFSET_TABLE_REGNUM
- GP_REG_FIRST
);
4370 total_size
-= gp_reg_rounded
;
4371 gp_reg_rounded
= MIPS_STACK_ALIGN (gp_reg_size
);
4372 total_size
+= gp_reg_rounded
;
4375 /* Save other computed information. */
4376 current_frame_info
.total_size
= total_size
;
4377 current_frame_info
.var_size
= var_size
;
4378 current_frame_info
.args_size
= args_size
;
4379 current_frame_info
.extra_size
= extra_size
;
4380 current_frame_info
.gp_reg_size
= gp_reg_size
;
4381 current_frame_info
.fp_reg_size
= fp_reg_size
;
4382 current_frame_info
.mask
= mask
;
4383 current_frame_info
.fmask
= fmask
;
4384 current_frame_info
.initialized
= reload_completed
;
4385 current_frame_info
.num_gp
= gp_reg_size
/ UNITS_PER_WORD
;
4386 current_frame_info
.num_fp
= fp_reg_size
/ (fp_inc
* UNITS_PER_FPREG
);
4390 unsigned long offset
= args_size
+ extra_size
+ var_size
4391 + gp_reg_size
- UNITS_PER_WORD
;
4392 current_frame_info
.gp_sp_offset
= offset
;
4393 current_frame_info
.gp_save_offset
= offset
- total_size
;
4397 current_frame_info
.gp_sp_offset
= 0;
4398 current_frame_info
.gp_save_offset
= 0;
4404 unsigned long offset
= (args_size
+ extra_size
+ var_size
4405 + gp_reg_rounded
+ fp_reg_size
4406 - fp_inc
* UNITS_PER_FPREG
);
4407 current_frame_info
.fp_sp_offset
= offset
;
4408 current_frame_info
.fp_save_offset
= offset
- total_size
+ UNITS_PER_WORD
;
4412 current_frame_info
.fp_sp_offset
= 0;
4413 current_frame_info
.fp_save_offset
= 0;
4416 /* Ok, we're done. */
4421 /* Common code to emit the insns (or to write the instructions to a file)
4422 to save/restore registers.
4424 Other parts of the code assume that MIPS_TEMP1_REGNUM (aka large_reg)
4425 is not modified within save_restore_insns. */
4427 #define BITSET_P(value,bit) (((value) & (1L << (bit))) != 0)
4430 save_restore_insns (store_p
, large_reg
, large_offset
, file
)
4431 int store_p
; /* true if this is prologue */
4432 rtx large_reg
; /* register holding large offset constant or NULL */
4433 long large_offset
; /* large constant offset value */
4434 FILE *file
; /* file to write instructions to instead of making RTL */
4436 long mask
= current_frame_info
.mask
;
4437 long fmask
= current_frame_info
.fmask
;
4445 if (frame_pointer_needed
&& !BITSET_P (mask
, FRAME_POINTER_REGNUM
- GP_REG_FIRST
))
4448 if (mask
== 0 && fmask
== 0)
4451 /* Save registers starting from high to low. The debuggers prefer
4452 at least the return register be stored at func+4, and also it
4453 allows us not to need a nop in the epilog if at least one
4454 register is reloaded in addition to return address. */
4456 /* Save GP registers if needed. */
4459 /* Pick which pointer to use as a base register. For small
4460 frames, just use the stack pointer. Otherwise, use a
4461 temporary register. Save 2 cycles if the save area is near
4462 the end of a large frame, by reusing the constant created in
4463 the prologue/epilogue to adjust the stack frame. */
4465 gp_offset
= current_frame_info
.gp_sp_offset
;
4466 end_offset
= gp_offset
- (current_frame_info
.gp_reg_size
- UNITS_PER_WORD
);
4468 if (gp_offset
< 0 || end_offset
< 0)
4469 fatal ("gp_offset (%ld) or end_offset (%ld) is less than zero.",
4470 gp_offset
, end_offset
);
4472 else if (gp_offset
< 32768)
4474 base_reg_rtx
= stack_pointer_rtx
;
4478 else if (large_reg
!= (rtx
)0
4479 && (((unsigned long)(large_offset
- gp_offset
)) < 32768)
4480 && (((unsigned long)(large_offset
- end_offset
)) < 32768))
4482 base_reg_rtx
= gen_rtx (REG
, Pmode
, MIPS_TEMP2_REGNUM
);
4483 base_offset
= large_offset
;
4484 if (file
== (FILE *)0)
4487 emit_insn (gen_adddi3 (base_reg_rtx
, large_reg
, stack_pointer_rtx
));
4489 emit_insn (gen_addsi3 (base_reg_rtx
, large_reg
, stack_pointer_rtx
));
4492 fprintf (file
, "\t%s\t%s,%s,%s\n",
4493 TARGET_LONG64
? "daddu" : "addu",
4494 reg_names
[MIPS_TEMP2_REGNUM
],
4495 reg_names
[REGNO (large_reg
)],
4496 reg_names
[STACK_POINTER_REGNUM
]);
4501 base_reg_rtx
= gen_rtx (REG
, Pmode
, MIPS_TEMP2_REGNUM
);
4502 base_offset
= gp_offset
;
4503 if (file
== (FILE *)0)
4505 emit_move_insn (base_reg_rtx
, GEN_INT (gp_offset
));
4507 emit_insn (gen_adddi3 (base_reg_rtx
, base_reg_rtx
, stack_pointer_rtx
));
4509 emit_insn (gen_addsi3 (base_reg_rtx
, base_reg_rtx
, stack_pointer_rtx
));
4512 fprintf (file
, "\tli\t%s,0x%.08lx\t# %ld\n\t%s\t%s,%s,%s\n",
4513 reg_names
[MIPS_TEMP2_REGNUM
],
4516 TARGET_LONG64
? "daddu" : "addu",
4517 reg_names
[MIPS_TEMP2_REGNUM
],
4518 reg_names
[MIPS_TEMP2_REGNUM
],
4519 reg_names
[STACK_POINTER_REGNUM
]);
4522 for (regno
= GP_REG_LAST
; regno
>= GP_REG_FIRST
; regno
--)
4524 if (BITSET_P (mask
, regno
- GP_REG_FIRST
))
4526 if (file
== (FILE *)0)
4528 rtx reg_rtx
= gen_rtx (REG
, word_mode
, regno
);
4529 rtx mem_rtx
= gen_rtx (MEM
, word_mode
,
4530 gen_rtx (PLUS
, Pmode
, base_reg_rtx
,
4531 GEN_INT (gp_offset
- base_offset
)));
4534 emit_move_insn (mem_rtx
, reg_rtx
);
4535 else if (!TARGET_ABICALLS
4536 || regno
!= (PIC_OFFSET_TABLE_REGNUM
- GP_REG_FIRST
))
4537 emit_move_insn (reg_rtx
, mem_rtx
);
4541 if (store_p
|| !TARGET_ABICALLS
4542 || regno
!= (PIC_OFFSET_TABLE_REGNUM
- GP_REG_FIRST
))
4543 fprintf (file
, "\t%s\t%s,%ld(%s)\n",
4545 ? (store_p
) ? "sd" : "ld"
4546 : (store_p
) ? "sw" : "lw"),
4548 gp_offset
- base_offset
,
4549 reg_names
[REGNO(base_reg_rtx
)]);
4552 gp_offset
-= UNITS_PER_WORD
;
4558 base_reg_rtx
= (rtx
)0; /* Make sure these are initialzed */
4562 /* Save floating point registers if needed. */
4565 int fp_inc
= (TARGET_FLOAT64
) ? 1 : 2;
4566 int fp_size
= fp_inc
* UNITS_PER_FPREG
;
4568 /* Pick which pointer to use as a base register. */
4569 fp_offset
= current_frame_info
.fp_sp_offset
;
4570 end_offset
= fp_offset
- (current_frame_info
.fp_reg_size
- fp_size
);
4572 if (fp_offset
< 0 || end_offset
< 0)
4573 fatal ("fp_offset (%ld) or end_offset (%ld) is less than zero.",
4574 fp_offset
, end_offset
);
4576 else if (fp_offset
< 32768)
4578 base_reg_rtx
= stack_pointer_rtx
;
4582 else if (base_reg_rtx
!= (rtx
)0
4583 && (((unsigned long)(base_offset
- fp_offset
)) < 32768)
4584 && (((unsigned long)(base_offset
- end_offset
)) < 32768))
4586 ; /* already set up for gp registers above */
4589 else if (large_reg
!= (rtx
)0
4590 && (((unsigned long)(large_offset
- fp_offset
)) < 32768)
4591 && (((unsigned long)(large_offset
- end_offset
)) < 32768))
4593 base_reg_rtx
= gen_rtx (REG
, Pmode
, MIPS_TEMP2_REGNUM
);
4594 base_offset
= large_offset
;
4595 if (file
== (FILE *)0)
4598 emit_insn (gen_adddi3 (base_reg_rtx
, large_reg
, stack_pointer_rtx
));
4600 emit_insn (gen_addsi3 (base_reg_rtx
, large_reg
, stack_pointer_rtx
));
4603 fprintf (file
, "\t%s\t%s,%s,%s\n",
4604 TARGET_LONG64
? "daddu" : "addu",
4605 reg_names
[MIPS_TEMP2_REGNUM
],
4606 reg_names
[REGNO (large_reg
)],
4607 reg_names
[STACK_POINTER_REGNUM
]);
4612 base_reg_rtx
= gen_rtx (REG
, Pmode
, MIPS_TEMP2_REGNUM
);
4613 base_offset
= fp_offset
;
4614 if (file
== (FILE *)0)
4616 emit_move_insn (base_reg_rtx
, GEN_INT (fp_offset
));
4618 emit_insn (gen_adddi3 (base_reg_rtx
, base_reg_rtx
, stack_pointer_rtx
));
4620 emit_insn (gen_addsi3 (base_reg_rtx
, base_reg_rtx
, stack_pointer_rtx
));
4623 fprintf (file
, "\tli\t%s,0x%.08lx\t# %ld\n\t%s\t%s,%s,%s\n",
4624 reg_names
[MIPS_TEMP2_REGNUM
],
4627 TARGET_LONG64
? "daddu" : "addu",
4628 reg_names
[MIPS_TEMP2_REGNUM
],
4629 reg_names
[MIPS_TEMP2_REGNUM
],
4630 reg_names
[STACK_POINTER_REGNUM
]);
4633 for (regno
= FP_REG_LAST
-1; regno
>= FP_REG_FIRST
; regno
-= fp_inc
)
4635 if (BITSET_P (fmask
, regno
- FP_REG_FIRST
))
4637 if (file
== (FILE *)0)
4639 rtx reg_rtx
= gen_rtx (REG
, DFmode
, regno
);
4640 rtx mem_rtx
= gen_rtx (MEM
, DFmode
,
4641 gen_rtx (PLUS
, Pmode
, base_reg_rtx
,
4642 GEN_INT (fp_offset
- base_offset
)));
4645 emit_move_insn (mem_rtx
, reg_rtx
);
4647 emit_move_insn (reg_rtx
, mem_rtx
);
4650 fprintf (file
, "\t%s\t%s,%ld(%s)\n",
4651 (store_p
) ? "s.d" : "l.d",
4653 fp_offset
- base_offset
,
4654 reg_names
[REGNO(base_reg_rtx
)]);
4657 fp_offset
-= fp_size
;
4664 /* Set up the stack and frame (if desired) for the function. */
4667 function_prologue (file
, size
)
4671 long tsize
= current_frame_info
.total_size
;
4673 ASM_OUTPUT_SOURCE_FILENAME (file
, DECL_SOURCE_FILE (current_function_decl
));
4675 if (debug_info_level
!= DINFO_LEVEL_TERSE
)
4676 ASM_OUTPUT_SOURCE_LINE (file
, DECL_SOURCE_LINE (current_function_decl
));
4678 inside_function
= 1;
4679 fputs ("\t.ent\t", file
);
4680 assemble_name (file
, current_function_name
);
4683 assemble_name (file
, current_function_name
);
4684 fputs (":\n", file
);
4686 fprintf (file
, "\t.frame\t%s,%d,%s\t\t# vars= %d, regs= %d/%d, args= %d, extra= %d\n",
4687 reg_names
[ (frame_pointer_needed
) ? FRAME_POINTER_REGNUM
: STACK_POINTER_REGNUM
],
4689 reg_names
[31 + GP_REG_FIRST
],
4690 current_frame_info
.var_size
,
4691 current_frame_info
.num_gp
,
4692 current_frame_info
.num_fp
,
4693 current_function_outgoing_args_size
,
4694 current_frame_info
.extra_size
);
4696 fprintf (file
, "\t.mask\t0x%08lx,%d\n\t.fmask\t0x%08lx,%d\n",
4697 current_frame_info
.mask
,
4698 current_frame_info
.gp_save_offset
,
4699 current_frame_info
.fmask
,
4700 current_frame_info
.fp_save_offset
);
4702 if (TARGET_ABICALLS
)
4704 char *sp_str
= reg_names
[STACK_POINTER_REGNUM
];
4706 fprintf (file
, "\t.set\tnoreorder\n\t.cpload\t%s\n\t.set\treorder\n",
4707 reg_names
[PIC_FUNCTION_ADDR_REGNUM
]);
4710 fprintf (file
, "\t%s\t%s,%s,%d\n",
4711 (TARGET_LONG64
? "dsubu" : "subu"),
4712 sp_str
, sp_str
, tsize
);
4713 fprintf (file
, "\t.cprestore %d\n", current_frame_info
.args_size
);
4719 /* Expand the prologue into a bunch of separate insns. */
4722 mips_expand_prologue ()
4726 rtx tmp_rtx
= (rtx
)0;
4727 char *arg_name
= (char *)0;
4728 tree fndecl
= current_function_decl
;
4729 tree fntype
= TREE_TYPE (fndecl
);
4730 tree fnargs
= (TREE_CODE (fntype
) != METHOD_TYPE
)
4731 ? DECL_ARGUMENTS (fndecl
)
4737 CUMULATIVE_ARGS args_so_far
;
4739 /* If struct value address is treated as the first argument, make it so. */
4740 if (aggregate_value_p (DECL_RESULT (fndecl
))
4741 && ! current_function_returns_pcc_struct
4742 && struct_value_incoming_rtx
== 0)
4744 tree type
= build_pointer_type (fntype
);
4745 tree function_result_decl
= build_decl (PARM_DECL
, NULL_TREE
, type
);
4746 DECL_ARG_TYPE (function_result_decl
) = type
;
4747 TREE_CHAIN (function_result_decl
) = fnargs
;
4748 fnargs
= function_result_decl
;
4751 /* Determine the last argument, and get its name. */
4753 INIT_CUMULATIVE_ARGS (args_so_far
, fntype
, (rtx
)0);
4754 regno
= GP_ARG_FIRST
;
4756 for (cur_arg
= fnargs
; cur_arg
!= (tree
)0; cur_arg
= next_arg
)
4758 tree type
= DECL_ARG_TYPE (cur_arg
);
4759 enum machine_mode passed_mode
= TYPE_MODE (type
);
4760 rtx entry_parm
= FUNCTION_ARG (args_so_far
,
4762 DECL_ARG_TYPE (cur_arg
),
4769 /* passed in a register, so will get homed automatically */
4770 if (GET_MODE (entry_parm
) == BLKmode
)
4771 words
= (int_size_in_bytes (type
) + 3) / 4;
4773 words
= (GET_MODE_SIZE (GET_MODE (entry_parm
)) + 3) / 4;
4775 regno
= REGNO (entry_parm
) + words
- 1;
4779 regno
= GP_ARG_LAST
+1;
4783 FUNCTION_ARG_ADVANCE (args_so_far
,
4785 DECL_ARG_TYPE (cur_arg
),
4788 next_arg
= TREE_CHAIN (cur_arg
);
4789 if (next_arg
== (tree
)0)
4791 if (DECL_NAME (cur_arg
))
4792 arg_name
= IDENTIFIER_POINTER (DECL_NAME (cur_arg
));
4798 /* In order to pass small structures by value in registers
4799 compatibly with the MIPS compiler, we need to shift the value
4800 into the high part of the register. Function_arg has encoded a
4801 PARALLEL rtx, holding a vector of adjustments to be made as the
4802 next_arg_reg variable, so we split up the insns, and emit them
4805 next_arg_reg
= FUNCTION_ARG (args_so_far
, VOIDmode
, void_type_node
, 1);
4806 if (next_arg_reg
!= (rtx
)0 && GET_CODE (next_arg_reg
) == PARALLEL
)
4808 rtvec adjust
= XVEC (next_arg_reg
, 0);
4809 int num
= GET_NUM_ELEM (adjust
);
4811 for (i
= 0; i
< num
; i
++)
4813 rtx pattern
= RTVEC_ELT (adjust
, i
);
4814 if (GET_CODE (pattern
) != SET
4815 || GET_CODE (SET_SRC (pattern
)) != ASHIFT
)
4816 abort_with_insn (pattern
, "Insn is not a shift");
4818 PUT_CODE (SET_SRC (pattern
), ASHIFTRT
);
4819 emit_insn (pattern
);
4823 tsize
= compute_frame_size (get_frame_size ());
4825 /* If this function is a varargs function, store any registers that
4826 would normally hold arguments ($4 - $7) on the stack. */
4827 if ((TYPE_ARG_TYPES (fntype
) != 0
4828 && (TREE_VALUE (tree_last (TYPE_ARG_TYPES (fntype
))) != void_type_node
))
4829 || (arg_name
!= (char *)0
4830 && ((arg_name
[0] == '_' && strcmp (arg_name
, "__builtin_va_alist") == 0)
4831 || (arg_name
[0] == 'v' && strcmp (arg_name
, "va_alist") == 0))))
4833 int offset
= (regno
- GP_ARG_FIRST
) * UNITS_PER_WORD
;
4834 rtx ptr
= stack_pointer_rtx
;
4836 /* If we are doing svr4-abi, sp has already been decremented by tsize. */
4837 if (TARGET_ABICALLS
)
4840 for (; regno
<= GP_ARG_LAST
; regno
++)
4843 ptr
= gen_rtx (PLUS
, Pmode
, stack_pointer_rtx
, GEN_INT (offset
));
4844 emit_move_insn (gen_rtx (MEM
, word_mode
, ptr
),
4845 gen_rtx (REG
, word_mode
, regno
));
4846 offset
+= UNITS_PER_WORD
;
4852 rtx tsize_rtx
= GEN_INT (tsize
);
4854 /* If we are doing svr4-abi, sp move is done by function_prologue. */
4855 if (!TARGET_ABICALLS
)
4859 tmp_rtx
= gen_rtx (REG
, Pmode
, MIPS_TEMP1_REGNUM
);
4860 emit_move_insn (tmp_rtx
, tsize_rtx
);
4861 tsize_rtx
= tmp_rtx
;
4865 emit_insn (gen_subdi3 (stack_pointer_rtx
, stack_pointer_rtx
,
4868 emit_insn (gen_subsi3 (stack_pointer_rtx
, stack_pointer_rtx
,
4872 save_restore_insns (TRUE
, tmp_rtx
, tsize
, (FILE *)0);
4874 if (frame_pointer_needed
)
4877 emit_insn (gen_movdi (frame_pointer_rtx
, stack_pointer_rtx
));
4879 emit_insn (gen_movsi (frame_pointer_rtx
, stack_pointer_rtx
));
4883 /* If we are profiling, make sure no instructions are scheduled before
4884 the call to mcount. */
4886 if (profile_flag
|| profile_block_flag
)
4887 emit_insn (gen_blockage ());
4891 /* Do any necessary cleanup after a function to restore stack, frame, and regs. */
4893 #define RA_MASK ((long) 0x80000000) /* 1 << 31 */
4894 #define PIC_OFFSET_TABLE_MASK (1 << (PIC_OFFSET_TABLE_REGNUM - GP_REG_FIRST))
4897 function_epilogue (file
, size
)
4902 char *sp_str
= reg_names
[STACK_POINTER_REGNUM
];
4903 char *t1_str
= reg_names
[MIPS_TEMP1_REGNUM
];
4904 rtx epilogue_delay
= current_function_epilogue_delay_list
;
4905 int noreorder
= (epilogue_delay
!= 0);
4906 int noepilogue
= FALSE
;
4907 int load_nop
= FALSE
;
4909 rtx tmp_rtx
= (rtx
)0;
4913 /* The epilogue does not depend on any registers, but the stack
4914 registers, so we assume that if we have 1 pending nop, it can be
4915 ignored, and 2 it must be filled (2 nops occur for integer
4916 multiply and divide). */
4918 if (dslots_number_nops
> 0)
4920 if (dslots_number_nops
== 1)
4922 dslots_number_nops
= 0;
4923 dslots_load_filled
++;
4927 while (--dslots_number_nops
> 0)
4928 fputs ("\t#nop\n", asm_out_file
);
4935 fputs ("\t.set\tat\n", file
);
4936 error ("internal gcc error: .set noat left on in epilogue");
4939 if (set_nomacro
!= 0)
4942 fputs ("\t.set\tmacro\n", file
);
4943 error ("internal gcc error: .set nomacro left on in epilogue");
4946 if (set_noreorder
!= 0)
4949 fputs ("\t.set\treorder\n", file
);
4950 error ("internal gcc error: .set noreorder left on in epilogue");
4953 if (set_volatile
!= 0)
4956 fprintf (file
, "\t%s.set\tnovolatile\n", (TARGET_MIPS_AS
) ? "" : "#");
4957 error ("internal gcc error: .set volatile left on in epilogue");
4960 size
= MIPS_STACK_ALIGN (size
);
4961 tsize
= (!current_frame_info
.initialized
)
4962 ? compute_frame_size (size
)
4963 : current_frame_info
.total_size
;
4965 if (tsize
== 0 && epilogue_delay
== 0)
4967 rtx insn
= get_last_insn ();
4969 /* If the last insn was a BARRIER, we don't have to write any code
4970 because a jump (aka return) was put there. */
4971 if (GET_CODE (insn
) == NOTE
)
4972 insn
= prev_nonnote_insn (insn
);
4973 if (insn
&& GET_CODE (insn
) == BARRIER
)
4981 /* In the reload sequence, we don't need to fill the load delay
4982 slots for most of the loads, also see if we can fill the final
4983 delay slot if not otherwise filled by the reload sequence. */
4986 fprintf (file
, "\t.set\tnoreorder\n");
4990 fprintf (file
, "\tli\t%s,0x%.08lx\t# %ld\n", t1_str
, (long)tsize
, (long)tsize
);
4991 tmp_rtx
= gen_rtx (REG
, Pmode
, MIPS_TEMP1_REGNUM
);
4994 if (frame_pointer_needed
)
4995 fprintf (file
, "\tmove\t%s,%s\t\t\t# sp not trusted here\n",
4996 sp_str
, reg_names
[FRAME_POINTER_REGNUM
]);
4998 save_restore_insns (FALSE
, tmp_rtx
, tsize
, file
);
5000 load_only_r31
= (((current_frame_info
.mask
5001 & ~ (TARGET_ABICALLS
? PIC_OFFSET_TABLE_MASK
: 0))
5003 && current_frame_info
.fmask
== 0);
5007 /* If the only register saved is the return address, we need a
5008 nop, unless we have an instruction to put into it. Otherwise
5009 we don't since reloading multiple registers doesn't reference
5010 the register being loaded. */
5015 final_scan_insn (XEXP (epilogue_delay
, 0),
5019 1); /* nopeepholes */
5022 fprintf (file
, "\tnop\n");
5027 fprintf (file
, "\tj\t%s\n", reg_names
[GP_REG_FIRST
+ 31]);
5030 fprintf (file
, "\t%s\t%s,%s,%s\n",
5031 TARGET_LONG64
? "daddu" : "addu",
5032 sp_str
, sp_str
, t1_str
);
5035 fprintf (file
, "\t%s\t%s,%s,%d\n",
5036 TARGET_LONG64
? "daddu" : "addu",
5037 sp_str
, sp_str
, tsize
);
5039 else if (!load_only_r31
&& epilogue_delay
!= 0)
5040 final_scan_insn (XEXP (epilogue_delay
, 0),
5044 1); /* nopeepholes */
5046 fprintf (file
, "\t.set\treorder\n");
5052 fprintf (file
, "\t%s\t%s,%s,%s\n",
5053 TARGET_LONG64
? "daddu" : "addu",
5054 sp_str
, sp_str
, t1_str
);
5057 fprintf (file
, "\t%s\t%s,%s,%d\n",
5058 TARGET_LONG64
? "daddu" : "addu",
5059 sp_str
, sp_str
, tsize
);
5061 fprintf (file
, "\tj\t%s\n", reg_names
[GP_REG_FIRST
+ 31]);
5065 fputs ("\t.end\t", file
);
5066 assemble_name (file
, current_function_name
);
5071 int num_gp_regs
= current_frame_info
.gp_reg_size
/ 4;
5072 int num_fp_regs
= current_frame_info
.fp_reg_size
/ 8;
5073 int num_regs
= num_gp_regs
+ num_fp_regs
;
5074 char *name
= current_function_name
;
5079 dslots_load_total
+= num_regs
;
5082 dslots_jump_total
++;
5086 dslots_load_filled
+= num_regs
;
5088 /* If the only register saved is the return register, we
5089 can't fill this register's delay slot. */
5091 if (load_only_r31
&& epilogue_delay
== 0)
5092 dslots_load_filled
--;
5094 if (tsize
> 0 || (!load_only_r31
&& epilogue_delay
!= 0))
5095 dslots_jump_filled
++;
5099 "%-20s fp=%c leaf=%c alloca=%c setjmp=%c stack=%4ld arg=%3ld reg=%2d/%d delay=%3d/%3dL %3d/%3dJ refs=%3d/%3d/%3d",
5101 (frame_pointer_needed
) ? 'y' : 'n',
5102 ((current_frame_info
.mask
& RA_MASK
) != 0) ? 'n' : 'y',
5103 (current_function_calls_alloca
) ? 'y' : 'n',
5104 (current_function_calls_setjmp
) ? 'y' : 'n',
5105 (long)current_frame_info
.total_size
,
5106 (long)current_function_outgoing_args_size
,
5107 num_gp_regs
, num_fp_regs
,
5108 dslots_load_total
, dslots_load_filled
,
5109 dslots_jump_total
, dslots_jump_filled
,
5110 num_refs
[0], num_refs
[1], num_refs
[2]);
5112 if (HALF_PIC_NUMBER_PTRS
> prev_half_pic_ptrs
)
5114 fprintf (stderr
, " half-pic=%3d", HALF_PIC_NUMBER_PTRS
- prev_half_pic_ptrs
);
5115 prev_half_pic_ptrs
= HALF_PIC_NUMBER_PTRS
;
5118 if (HALF_PIC_NUMBER_REFS
> prev_half_pic_refs
)
5120 fprintf (stderr
, " pic-ref=%3d", HALF_PIC_NUMBER_REFS
- prev_half_pic_refs
);
5121 prev_half_pic_refs
= HALF_PIC_NUMBER_REFS
;
5124 fputc ('\n', stderr
);
5127 /* Reset state info for each function. */
5128 inside_function
= FALSE
;
5129 ignore_line_number
= FALSE
;
5130 dslots_load_total
= 0;
5131 dslots_jump_total
= 0;
5132 dslots_load_filled
= 0;
5133 dslots_jump_filled
= 0;
5137 mips_load_reg
= (rtx
)0;
5138 mips_load_reg2
= (rtx
)0;
5139 current_frame_info
= zero_frame_info
;
5141 /* Restore the output file if optimizing the GP (optimizing the GP causes
5142 the text to be diverted to a tempfile, so that data decls come before
5143 references to the data). */
5146 asm_out_file
= asm_out_data_file
;
5150 /* Expand the epilogue into a bunch of separate insns. */
5153 mips_expand_epilogue ()
5155 long tsize
= current_frame_info
.total_size
;
5156 rtx tsize_rtx
= GEN_INT (tsize
);
5157 rtx tmp_rtx
= (rtx
)0;
5161 tmp_rtx
= gen_rtx (REG
, Pmode
, MIPS_TEMP1_REGNUM
);
5162 emit_move_insn (tmp_rtx
, tsize_rtx
);
5163 tsize_rtx
= tmp_rtx
;
5168 if (frame_pointer_needed
)
5171 emit_insn (gen_movdi (stack_pointer_rtx
, frame_pointer_rtx
));
5173 emit_insn (gen_movsi (stack_pointer_rtx
, frame_pointer_rtx
));
5176 save_restore_insns (FALSE
, tmp_rtx
, tsize
, (FILE *)0);
5179 emit_insn (gen_adddi3 (stack_pointer_rtx
, stack_pointer_rtx
,
5182 emit_insn (gen_addsi3 (stack_pointer_rtx
, stack_pointer_rtx
,
5186 emit_jump_insn (gen_return_internal (gen_rtx (REG
, Pmode
, GP_REG_FIRST
+31)));
5190 /* Define the number of delay slots needed for the function epilogue.
5192 On the mips, we need a slot if either no stack has been allocated,
5193 or the only register saved is the return register. */
5196 mips_epilogue_delay_slots ()
5198 if (!current_frame_info
.initialized
)
5199 (void) compute_frame_size (get_frame_size ());
5201 if (current_frame_info
.total_size
== 0)
5204 if (current_frame_info
.mask
== RA_MASK
&& current_frame_info
.fmask
== 0)
5211 /* Return true if this function is known to have a null epilogue.
5212 This allows the optimizer to omit jumps to jumps if no stack
5216 simple_epilogue_p ()
5218 if (!reload_completed
)
5221 if (current_frame_info
.initialized
)
5222 return current_frame_info
.total_size
== 0;
5224 return (compute_frame_size (get_frame_size ())) == 0;
5227 /* Choose the section to use for the constant rtx expression X that has
5230 mips_select_rtx_section (mode
, x
)
5231 enum machine_mode mode
;
5234 if (TARGET_EMBEDDED_DATA
)
5236 /* For embedded applications, always put constants in read-only data,
5237 in order to reduce RAM usage. */
5242 /* For hosted applications, always put constants in small data if
5243 possible, as this gives the best performance. */
5245 if (GET_MODE_SIZE (mode
) <= mips_section_threshold
5246 && mips_section_threshold
> 0)
5253 /* Choose the section to use for DECL. RELOC is true if its value contains
5254 any relocatable expression. */
5256 mips_select_section (decl
, reloc
)
5260 int size
= int_size_in_bytes (TREE_TYPE (decl
));
5262 if (TARGET_EMBEDDED_PIC
5263 && TREE_CODE (decl
) == STRING_CST
5264 && !flag_writable_strings
)
5266 /* For embedded position independent code, put constant strings
5267 in the text section, because the data section is limited to
5272 else if (TARGET_EMBEDDED_DATA
)
5274 /* For embedded applications, always put an object in read-only data
5275 if possible, in order to reduce RAM usage. */
5277 if (((TREE_READONLY (decl
) && !TREE_SIDE_EFFECTS (decl
)
5278 && DECL_INITIAL (decl
)
5279 && (DECL_INITIAL (decl
) == error_mark_node
5280 || TREE_CONSTANT (DECL_INITIAL (decl
))))
5281 /* Deal with calls from output_constant_def_contents. */
5282 || (TREE_CODE (decl
) != VAR_DECL
5283 && (TREE_CODE (decl
) != STRING_CST
5284 || !flag_writable_strings
)))
5285 && ! (flag_pic
&& reloc
))
5287 else if (size
> 0 && size
<= mips_section_threshold
)
5294 /* For hosted applications, always put an object in small data if
5295 possible, as this gives the best performance. */
5297 if (size
> 0 && size
<= mips_section_threshold
)
5299 else if (((TREE_READONLY (decl
) && !TREE_SIDE_EFFECTS (decl
)
5300 && DECL_INITIAL (decl
)
5301 && (DECL_INITIAL (decl
) == error_mark_node
5302 || TREE_CONSTANT (DECL_INITIAL (decl
))))
5303 /* Deal with calls from output_constant_def_contents. */
5304 || (TREE_CODE (decl
) != VAR_DECL
5305 && (TREE_CODE (decl
) != STRING_CST
5306 || !flag_writable_strings
)))
5307 && ! (flag_pic
&& reloc
))