1 /* FR30 specific functions.
2 Copyright (C) 1998-2015 Free Software Foundation, Inc.
3 Contributed by Cygnus Solutions.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
25 #include "coretypes.h"
29 #include "hard-reg-set.h"
30 #include "insn-config.h"
31 #include "conditions.h"
32 #include "insn-attr.h"
42 #include "fold-const.h"
43 #include "stor-layout.h"
48 #include "statistics.h"
58 #include "dominance.h"
64 #include "cfgcleanup.h"
66 #include "basic-block.h"
68 #include "diagnostic-core.h"
71 #include "target-def.h"
75 /*{{{ Function Prologues & Epilogues */
77 /* The FR30 stack looks like this:
79 Before call After call
81 +-----------------------+ +-----------------------+ high
83 | local variables, | | local variables, |
84 | reg save area, etc. | | reg save area, etc. |
86 +-----------------------+ +-----------------------+
88 | args to the func that | | args to this func. |
89 | is being called that | | |
90 SP ->| do not fit in regs | | |
91 +-----------------------+ +-----------------------+
92 | args that used to be | \
93 | in regs; only created | | pretend_size
94 AP-> | for vararg funcs | /
95 +-----------------------+
97 | register save area | |
99 +-----------------------+ | reg_size
101 +-----------------------+ |
102 FP ->| previous frame ptr | /
103 +-----------------------+
105 | local variables | | var_size
107 +-----------------------+
109 low | room for args to | |
110 memory | other funcs called | | args_size
113 +-----------------------+
115 Note, AP is a fake hard register. It will be eliminated in favor of
116 SP or FP as appropriate.
118 Note, Some or all of the stack sections above may be omitted if they
121 /* Structure to be filled in by fr30_compute_frame_size() with register
122 save masks, and offsets for the current function. */
123 struct fr30_frame_info
125 unsigned int total_size
; /* # Bytes that the entire frame takes up. */
126 unsigned int pretend_size
; /* # Bytes we push and pretend caller did. */
127 unsigned int args_size
; /* # Bytes that outgoing arguments take up. */
128 unsigned int reg_size
; /* # Bytes needed to store regs. */
129 unsigned int var_size
; /* # Bytes that variables take up. */
130 unsigned int frame_size
; /* # Bytes in current frame. */
131 unsigned int gmask
; /* Mask of saved registers. */
132 unsigned int save_fp
; /* Nonzero if frame pointer must be saved. */
133 unsigned int save_rp
; /* Nonzero if return pointer must be saved. */
134 int initialised
; /* Nonzero if frame size already calculated. */
137 /* Current frame information calculated by fr30_compute_frame_size(). */
138 static struct fr30_frame_info current_frame_info
;
140 /* Zero structure to initialize current_frame_info. */
141 static struct fr30_frame_info zero_frame_info
;
143 static void fr30_setup_incoming_varargs (cumulative_args_t
, machine_mode
,
145 static bool fr30_must_pass_in_stack (machine_mode
, const_tree
);
146 static int fr30_arg_partial_bytes (cumulative_args_t
, machine_mode
,
148 static rtx
fr30_function_arg (cumulative_args_t
, machine_mode
,
150 static void fr30_function_arg_advance (cumulative_args_t
, machine_mode
,
152 static bool fr30_frame_pointer_required (void);
153 static rtx
fr30_function_value (const_tree
, const_tree
, bool);
154 static rtx
fr30_libcall_value (machine_mode
, const_rtx
);
155 static bool fr30_function_value_regno_p (const unsigned int);
156 static bool fr30_can_eliminate (const int, const int);
157 static void fr30_asm_trampoline_template (FILE *);
158 static void fr30_trampoline_init (rtx
, tree
, rtx
);
159 static int fr30_num_arg_regs (machine_mode
, const_tree
);
161 #define FRAME_POINTER_MASK (1 << (FRAME_POINTER_REGNUM))
162 #define RETURN_POINTER_MASK (1 << (RETURN_POINTER_REGNUM))
164 /* Tell prologue and epilogue if register REGNO should be saved / restored.
165 The return address and frame pointer are treated separately.
166 Don't consider them here. */
167 #define MUST_SAVE_REGISTER(regno) \
168 ( (regno) != RETURN_POINTER_REGNUM \
169 && (regno) != FRAME_POINTER_REGNUM \
170 && df_regs_ever_live_p (regno) \
171 && ! call_used_regs [regno] )
173 #define MUST_SAVE_FRAME_POINTER (df_regs_ever_live_p (FRAME_POINTER_REGNUM) || frame_pointer_needed)
174 #define MUST_SAVE_RETURN_POINTER (df_regs_ever_live_p (RETURN_POINTER_REGNUM) || crtl->profile)
176 #if UNITS_PER_WORD == 4
177 #define WORD_ALIGN(SIZE) (((SIZE) + 3) & ~3)
180 /* Initialize the GCC target structure. */
181 #undef TARGET_ASM_ALIGNED_HI_OP
182 #define TARGET_ASM_ALIGNED_HI_OP "\t.hword\t"
183 #undef TARGET_ASM_ALIGNED_SI_OP
184 #define TARGET_ASM_ALIGNED_SI_OP "\t.word\t"
186 #undef TARGET_PROMOTE_PROTOTYPES
187 #define TARGET_PROMOTE_PROTOTYPES hook_bool_const_tree_true
188 #undef TARGET_PASS_BY_REFERENCE
189 #define TARGET_PASS_BY_REFERENCE hook_pass_by_reference_must_pass_in_stack
190 #undef TARGET_ARG_PARTIAL_BYTES
191 #define TARGET_ARG_PARTIAL_BYTES fr30_arg_partial_bytes
192 #undef TARGET_FUNCTION_ARG
193 #define TARGET_FUNCTION_ARG fr30_function_arg
194 #undef TARGET_FUNCTION_ARG_ADVANCE
195 #define TARGET_FUNCTION_ARG_ADVANCE fr30_function_arg_advance
197 #undef TARGET_FUNCTION_VALUE
198 #define TARGET_FUNCTION_VALUE fr30_function_value
199 #undef TARGET_LIBCALL_VALUE
200 #define TARGET_LIBCALL_VALUE fr30_libcall_value
201 #undef TARGET_FUNCTION_VALUE_REGNO_P
202 #define TARGET_FUNCTION_VALUE_REGNO_P fr30_function_value_regno_p
204 #undef TARGET_SETUP_INCOMING_VARARGS
205 #define TARGET_SETUP_INCOMING_VARARGS fr30_setup_incoming_varargs
206 #undef TARGET_MUST_PASS_IN_STACK
207 #define TARGET_MUST_PASS_IN_STACK fr30_must_pass_in_stack
209 #undef TARGET_FRAME_POINTER_REQUIRED
210 #define TARGET_FRAME_POINTER_REQUIRED fr30_frame_pointer_required
212 #undef TARGET_CAN_ELIMINATE
213 #define TARGET_CAN_ELIMINATE fr30_can_eliminate
215 #undef TARGET_ASM_TRAMPOLINE_TEMPLATE
216 #define TARGET_ASM_TRAMPOLINE_TEMPLATE fr30_asm_trampoline_template
217 #undef TARGET_TRAMPOLINE_INIT
218 #define TARGET_TRAMPOLINE_INIT fr30_trampoline_init
220 struct gcc_target targetm
= TARGET_INITIALIZER
;
223 /* Worker function for TARGET_CAN_ELIMINATE. */
226 fr30_can_eliminate (const int from ATTRIBUTE_UNUSED
, const int to
)
228 return (to
== FRAME_POINTER_REGNUM
|| ! frame_pointer_needed
);
231 /* Returns the number of bytes offset between FROM_REG and TO_REG
232 for the current function. As a side effect it fills in the
233 current_frame_info structure, if the data is available. */
235 fr30_compute_frame_size (int from_reg
, int to_reg
)
238 unsigned int return_value
;
239 unsigned int var_size
;
240 unsigned int args_size
;
241 unsigned int pretend_size
;
242 unsigned int reg_size
;
245 var_size
= WORD_ALIGN (get_frame_size ());
246 args_size
= WORD_ALIGN (crtl
->outgoing_args_size
);
247 pretend_size
= crtl
->args
.pretend_args_size
;
252 /* Calculate space needed for registers. */
253 for (regno
= 0; regno
< FIRST_PSEUDO_REGISTER
; regno
++)
255 if (MUST_SAVE_REGISTER (regno
))
257 reg_size
+= UNITS_PER_WORD
;
262 current_frame_info
.save_fp
= MUST_SAVE_FRAME_POINTER
;
263 current_frame_info
.save_rp
= MUST_SAVE_RETURN_POINTER
;
265 reg_size
+= (current_frame_info
.save_fp
+ current_frame_info
.save_rp
)
268 /* Save computed information. */
269 current_frame_info
.pretend_size
= pretend_size
;
270 current_frame_info
.var_size
= var_size
;
271 current_frame_info
.args_size
= args_size
;
272 current_frame_info
.reg_size
= reg_size
;
273 current_frame_info
.frame_size
= args_size
+ var_size
;
274 current_frame_info
.total_size
= args_size
+ var_size
+ reg_size
+ pretend_size
;
275 current_frame_info
.gmask
= gmask
;
276 current_frame_info
.initialised
= reload_completed
;
278 /* Calculate the required distance. */
281 if (to_reg
== STACK_POINTER_REGNUM
)
282 return_value
+= args_size
+ var_size
;
284 if (from_reg
== ARG_POINTER_REGNUM
)
285 return_value
+= reg_size
;
290 /* Called after register allocation to add any instructions needed for the
291 prologue. Using a prologue insn is favored compared to putting all of the
292 instructions in output_function_prologue(), since it allows the scheduler
293 to intermix instructions with the saves of the caller saved registers. In
294 some cases, it might be necessary to emit a barrier instruction as the last
295 insn to prevent such scheduling. */
298 fr30_expand_prologue (void)
303 if (! current_frame_info
.initialised
)
304 fr30_compute_frame_size (0, 0);
306 /* This cases shouldn't happen. Catch it now. */
307 gcc_assert (current_frame_info
.total_size
|| !current_frame_info
.gmask
);
309 /* Allocate space for register arguments if this is a variadic function. */
310 if (current_frame_info
.pretend_size
)
312 int regs_to_save
= current_frame_info
.pretend_size
/ UNITS_PER_WORD
;
314 /* Push argument registers into the pretend arg area. */
315 for (regno
= FIRST_ARG_REGNUM
+ FR30_NUM_ARG_REGS
; regno
--, regs_to_save
--;)
317 insn
= emit_insn (gen_movsi_push (gen_rtx_REG (Pmode
, regno
)));
318 RTX_FRAME_RELATED_P (insn
) = 1;
322 if (current_frame_info
.gmask
)
324 /* Save any needed call-saved regs. */
325 for (regno
= STACK_POINTER_REGNUM
; regno
--;)
327 if ((current_frame_info
.gmask
& (1 << regno
)) != 0)
329 insn
= emit_insn (gen_movsi_push (gen_rtx_REG (Pmode
, regno
)));
330 RTX_FRAME_RELATED_P (insn
) = 1;
335 /* Save return address if necessary. */
336 if (current_frame_info
.save_rp
)
338 insn
= emit_insn (gen_movsi_push (gen_rtx_REG (Pmode
,
339 RETURN_POINTER_REGNUM
)));
340 RTX_FRAME_RELATED_P (insn
) = 1;
343 /* Save old frame pointer and create new one, if necessary. */
344 if (current_frame_info
.save_fp
)
346 if (current_frame_info
.frame_size
< ((1 << 10) - UNITS_PER_WORD
))
348 int enter_size
= current_frame_info
.frame_size
+ UNITS_PER_WORD
;
351 insn
= emit_insn (gen_enter_func (GEN_INT (enter_size
)));
352 RTX_FRAME_RELATED_P (insn
) = 1;
354 pattern
= PATTERN (insn
);
356 /* Also mark all 3 subexpressions as RTX_FRAME_RELATED_P. */
357 if (GET_CODE (pattern
) == PARALLEL
)
360 for (x
= XVECLEN (pattern
, 0); x
--;)
362 rtx part
= XVECEXP (pattern
, 0, x
);
364 /* One of the insns in the ENTER pattern updates the
365 frame pointer. If we do not actually need the frame
366 pointer in this function then this is a side effect
367 rather than a desired effect, so we do not mark that
368 insn as being related to the frame set up. Doing this
369 allows us to compile the crash66.C test file in the
371 if (! frame_pointer_needed
372 && GET_CODE (part
) == SET
373 && SET_DEST (part
) == hard_frame_pointer_rtx
)
374 RTX_FRAME_RELATED_P (part
) = 0;
376 RTX_FRAME_RELATED_P (part
) = 1;
382 insn
= emit_insn (gen_movsi_push (frame_pointer_rtx
));
383 RTX_FRAME_RELATED_P (insn
) = 1;
385 if (frame_pointer_needed
)
387 insn
= emit_insn (gen_movsi (frame_pointer_rtx
, stack_pointer_rtx
));
388 RTX_FRAME_RELATED_P (insn
) = 1;
393 /* Allocate the stack frame. */
394 if (current_frame_info
.frame_size
== 0)
395 ; /* Nothing to do. */
396 else if (current_frame_info
.save_fp
397 && current_frame_info
.frame_size
< ((1 << 10) - UNITS_PER_WORD
))
398 ; /* Nothing to do. */
399 else if (current_frame_info
.frame_size
<= 512)
401 insn
= emit_insn (gen_add_to_stack
402 (GEN_INT (- (signed) current_frame_info
.frame_size
)));
403 RTX_FRAME_RELATED_P (insn
) = 1;
407 rtx tmp
= gen_rtx_REG (Pmode
, PROLOGUE_TMP_REGNUM
);
408 insn
= emit_insn (gen_movsi (tmp
, GEN_INT (current_frame_info
.frame_size
)));
409 RTX_FRAME_RELATED_P (insn
) = 1;
410 insn
= emit_insn (gen_subsi3 (stack_pointer_rtx
, stack_pointer_rtx
, tmp
));
411 RTX_FRAME_RELATED_P (insn
) = 1;
415 emit_insn (gen_blockage ());
418 /* Called after register allocation to add any instructions needed for the
419 epilogue. Using an epilogue insn is favored compared to putting all of the
420 instructions in output_function_epilogue(), since it allows the scheduler
421 to intermix instructions with the restores of the caller saved registers.
422 In some cases, it might be necessary to emit a barrier instruction as the
423 first insn to prevent such scheduling. */
425 fr30_expand_epilogue (void)
429 /* Perform the inversion operations of the prologue. */
430 gcc_assert (current_frame_info
.initialised
);
432 /* Pop local variables and arguments off the stack.
433 If frame_pointer_needed is TRUE then the frame pointer register
434 has actually been used as a frame pointer, and we can recover
435 the stack pointer from it, otherwise we must unwind the stack
437 if (current_frame_info
.frame_size
> 0)
439 if (current_frame_info
.save_fp
&& frame_pointer_needed
)
441 emit_insn (gen_leave_func ());
442 current_frame_info
.save_fp
= 0;
444 else if (current_frame_info
.frame_size
<= 508)
445 emit_insn (gen_add_to_stack
446 (GEN_INT (current_frame_info
.frame_size
)));
449 rtx tmp
= gen_rtx_REG (Pmode
, PROLOGUE_TMP_REGNUM
);
450 emit_insn (gen_movsi (tmp
, GEN_INT (current_frame_info
.frame_size
)));
451 emit_insn (gen_addsi3 (stack_pointer_rtx
, stack_pointer_rtx
, tmp
));
455 if (current_frame_info
.save_fp
)
456 emit_insn (gen_movsi_pop (frame_pointer_rtx
));
458 /* Pop all the registers that were pushed. */
459 if (current_frame_info
.save_rp
)
460 emit_insn (gen_movsi_pop (gen_rtx_REG (Pmode
, RETURN_POINTER_REGNUM
)));
462 for (regno
= 0; regno
< STACK_POINTER_REGNUM
; regno
++)
463 if (current_frame_info
.gmask
& (1 << regno
))
464 emit_insn (gen_movsi_pop (gen_rtx_REG (Pmode
, regno
)));
466 if (current_frame_info
.pretend_size
)
467 emit_insn (gen_add_to_stack (GEN_INT (current_frame_info
.pretend_size
)));
469 /* Reset state info for each function. */
470 current_frame_info
= zero_frame_info
;
472 emit_jump_insn (gen_return_from_func ());
475 /* Do any needed setup for a variadic function. We must create a register
476 parameter block, and then copy any anonymous arguments, plus the last
477 named argument, from registers into memory. * copying actually done in
478 fr30_expand_prologue().
480 ARG_REGS_USED_SO_FAR has *not* been updated for the last named argument
481 which has type TYPE and mode MODE, and we rely on this fact. */
483 fr30_setup_incoming_varargs (cumulative_args_t arg_regs_used_so_far_v
,
485 tree type ATTRIBUTE_UNUSED
,
487 int second_time ATTRIBUTE_UNUSED
)
489 CUMULATIVE_ARGS
*arg_regs_used_so_far
490 = get_cumulative_args (arg_regs_used_so_far_v
);
493 /* All BLKmode values are passed by reference. */
494 gcc_assert (mode
!= BLKmode
);
496 /* ??? This run-time test as well as the code inside the if
497 statement is probably unnecessary. */
498 if (targetm
.calls
.strict_argument_naming (arg_regs_used_so_far_v
))
499 /* If TARGET_STRICT_ARGUMENT_NAMING returns true, then the last named
500 arg must not be treated as an anonymous arg. */
501 /* ??? This is a pointer increment, which makes no sense. */
502 arg_regs_used_so_far
+= fr30_num_arg_regs (mode
, type
);
504 size
= FR30_NUM_ARG_REGS
- (* arg_regs_used_so_far
);
509 * pretend_size
= (size
* UNITS_PER_WORD
);
513 /*{{{ Printing operands */
515 /* Print a memory address as an operand to reference that memory location. */
518 fr30_print_operand_address (FILE *stream
, rtx address
)
520 switch (GET_CODE (address
))
523 output_addr_const (stream
, address
);
527 fprintf (stderr
, "code = %x\n", GET_CODE (address
));
529 output_operand_lossage ("fr30_print_operand_address: unhandled address");
534 /* Print an operand. */
537 fr30_print_operand (FILE *file
, rtx x
, int code
)
544 /* Output a :D if this instruction is delayed. */
545 if (dbr_sequence_length () != 0)
550 /* Compute the register name of the second register in a hi/lo
552 if (GET_CODE (x
) != REG
)
553 output_operand_lossage ("fr30_print_operand: unrecognized %%p code");
555 fprintf (file
, "r%d", REGNO (x
) + 1);
559 /* Convert GCC's comparison operators into FR30 comparison codes. */
560 switch (GET_CODE (x
))
562 case EQ
: fprintf (file
, "eq"); break;
563 case NE
: fprintf (file
, "ne"); break;
564 case LT
: fprintf (file
, "lt"); break;
565 case LE
: fprintf (file
, "le"); break;
566 case GT
: fprintf (file
, "gt"); break;
567 case GE
: fprintf (file
, "ge"); break;
568 case LTU
: fprintf (file
, "c"); break;
569 case LEU
: fprintf (file
, "ls"); break;
570 case GTU
: fprintf (file
, "hi"); break;
571 case GEU
: fprintf (file
, "nc"); break;
573 output_operand_lossage ("fr30_print_operand: unrecognized %%b code");
579 /* Convert GCC's comparison operators into the complimentary FR30
581 switch (GET_CODE (x
))
583 case EQ
: fprintf (file
, "ne"); break;
584 case NE
: fprintf (file
, "eq"); break;
585 case LT
: fprintf (file
, "ge"); break;
586 case LE
: fprintf (file
, "gt"); break;
587 case GT
: fprintf (file
, "le"); break;
588 case GE
: fprintf (file
, "lt"); break;
589 case LTU
: fprintf (file
, "nc"); break;
590 case LEU
: fprintf (file
, "hi"); break;
591 case GTU
: fprintf (file
, "ls"); break;
592 case GEU
: fprintf (file
, "c"); break;
594 output_operand_lossage ("fr30_print_operand: unrecognized %%B code");
600 /* Print a signed byte value as an unsigned value. */
601 if (GET_CODE (x
) != CONST_INT
)
602 output_operand_lossage ("fr30_print_operand: invalid operand to %%A code");
611 fprintf (file
, HOST_WIDE_INT_PRINT_DEC
, val
);
616 if (GET_CODE (x
) != CONST_INT
619 output_operand_lossage ("fr30_print_operand: invalid %%x code");
621 fprintf (file
, HOST_WIDE_INT_PRINT_DEC
, INTVAL (x
) - 16);
625 if (GET_CODE (x
) != CONST_DOUBLE
)
626 output_operand_lossage ("fr30_print_operand: invalid %%F code");
631 real_to_decimal (str
, CONST_DOUBLE_REAL_VALUE (x
),
642 fprintf (stderr
, "unknown code = %x\n", code
);
643 output_operand_lossage ("fr30_print_operand: unknown code");
647 switch (GET_CODE (x
))
650 fputs (reg_names
[REGNO (x
)], file
);
656 switch (GET_CODE (x0
))
659 gcc_assert ((unsigned) REGNO (x0
) < ARRAY_SIZE (reg_names
));
660 fprintf (file
, "@%s", reg_names
[REGNO (x0
)]);
664 if (GET_CODE (XEXP (x0
, 0)) != REG
665 || REGNO (XEXP (x0
, 0)) < FRAME_POINTER_REGNUM
666 || REGNO (XEXP (x0
, 0)) > STACK_POINTER_REGNUM
667 || GET_CODE (XEXP (x0
, 1)) != CONST_INT
)
669 fprintf (stderr
, "bad INDEXed address:");
671 output_operand_lossage ("fr30_print_operand: unhandled MEM");
673 else if (REGNO (XEXP (x0
, 0)) == FRAME_POINTER_REGNUM
)
675 HOST_WIDE_INT val
= INTVAL (XEXP (x0
, 1));
676 if (val
< -(1 << 9) || val
> ((1 << 9) - 4))
678 fprintf (stderr
, "frame INDEX out of range:");
680 output_operand_lossage ("fr30_print_operand: unhandled MEM");
682 fprintf (file
, "@(r14, #" HOST_WIDE_INT_PRINT_DEC
")", val
);
686 HOST_WIDE_INT val
= INTVAL (XEXP (x0
, 1));
687 if (val
< 0 || val
> ((1 << 6) - 4))
689 fprintf (stderr
, "stack INDEX out of range:");
691 output_operand_lossage ("fr30_print_operand: unhandled MEM");
693 fprintf (file
, "@(r15, #" HOST_WIDE_INT_PRINT_DEC
")", val
);
702 fprintf (stderr
, "bad MEM code = %x\n", GET_CODE (x0
));
704 output_operand_lossage ("fr30_print_operand: unhandled MEM");
710 /* We handle SFmode constants here as output_addr_const doesn't. */
711 if (GET_MODE (x
) == SFmode
)
716 REAL_VALUE_FROM_CONST_DOUBLE (d
, x
);
717 REAL_VALUE_TO_TARGET_SINGLE (d
, l
);
718 fprintf (file
, "0x%08lx", l
);
722 /* Fall through. Let output_addr_const deal with it. */
724 output_addr_const (file
, x
);
733 /* Implements TARGET_FUNCTION_VALUE. */
736 fr30_function_value (const_tree valtype
,
737 const_tree fntype_or_decli ATTRIBUTE_UNUSED
,
738 bool outgoing ATTRIBUTE_UNUSED
)
740 return gen_rtx_REG (TYPE_MODE (valtype
), RETURN_VALUE_REGNUM
);
743 /* Implements TARGET_LIBCALL_VALUE. */
746 fr30_libcall_value (machine_mode mode
,
747 const_rtx fun ATTRIBUTE_UNUSED
)
749 return gen_rtx_REG (mode
, RETURN_VALUE_REGNUM
);
752 /* Implements TARGET_FUNCTION_VALUE_REGNO_P. */
755 fr30_function_value_regno_p (const unsigned int regno
)
757 return (regno
== RETURN_VALUE_REGNUM
);
760 /*{{{ Function arguments */
762 /* Return true if we should pass an argument on the stack rather than
766 fr30_must_pass_in_stack (machine_mode mode
, const_tree type
)
772 return AGGREGATE_TYPE_P (type
);
775 /* Compute the number of word sized registers needed to hold a
776 function argument of mode INT_MODE and tree type TYPE. */
778 fr30_num_arg_regs (machine_mode mode
, const_tree type
)
782 if (targetm
.calls
.must_pass_in_stack (mode
, type
))
785 if (type
&& mode
== BLKmode
)
786 size
= int_size_in_bytes (type
);
788 size
= GET_MODE_SIZE (mode
);
790 return (size
+ UNITS_PER_WORD
- 1) / UNITS_PER_WORD
;
793 /* Returns the number of bytes in which *part* of a parameter of machine
794 mode MODE and tree type TYPE (which may be NULL if the type is not known).
795 If the argument fits entirely in the argument registers, or entirely on
796 the stack, then 0 is returned.
797 CUM is the number of argument registers already used by earlier
798 parameters to the function. */
801 fr30_arg_partial_bytes (cumulative_args_t cum_v
, machine_mode mode
,
802 tree type
, bool named
)
804 CUMULATIVE_ARGS
*cum
= get_cumulative_args (cum_v
);
806 /* Unnamed arguments, i.e. those that are prototyped as ...
807 are always passed on the stack.
808 Also check here to see if all the argument registers are full. */
809 if (named
== 0 || *cum
>= FR30_NUM_ARG_REGS
)
812 /* Work out how many argument registers would be needed if this
813 parameter were to be passed entirely in registers. If there
814 are sufficient argument registers available (or if no registers
815 are needed because the parameter must be passed on the stack)
816 then return zero, as this parameter does not require partial
817 register, partial stack stack space. */
818 if (*cum
+ fr30_num_arg_regs (mode
, type
) <= FR30_NUM_ARG_REGS
)
821 return (FR30_NUM_ARG_REGS
- *cum
) * UNITS_PER_WORD
;
825 fr30_function_arg (cumulative_args_t cum_v
, machine_mode mode
,
826 const_tree type
, bool named
)
828 CUMULATIVE_ARGS
*cum
= get_cumulative_args (cum_v
);
831 || fr30_must_pass_in_stack (mode
, type
)
832 || *cum
>= FR30_NUM_ARG_REGS
)
835 return gen_rtx_REG (mode
, *cum
+ FIRST_ARG_REGNUM
);
838 /* A C statement (sans semicolon) to update the summarizer variable CUM to
839 advance past an argument in the argument list. The values MODE, TYPE and
840 NAMED describe that argument. Once this is done, the variable CUM is
841 suitable for analyzing the *following* argument with `FUNCTION_ARG', etc.
843 This macro need not do anything if the argument in question was passed on
844 the stack. The compiler knows how to track the amount of stack space used
845 for arguments without any special help. */
847 fr30_function_arg_advance (cumulative_args_t cum
, machine_mode mode
,
848 const_tree type
, bool named
)
850 *get_cumulative_args (cum
) += named
* fr30_num_arg_regs (mode
, type
);
854 /*{{{ Operand predicates */
857 #define Mmode machine_mode
860 /* Returns true iff all the registers in the operands array
861 are in descending or ascending order. */
863 fr30_check_multiple_regs (rtx
*operands
, int num_operands
, int descending
)
867 unsigned int prev_regno
= 0;
869 while (num_operands
--)
871 if (GET_CODE (operands
[num_operands
]) != REG
)
874 if (REGNO (operands
[num_operands
]) < prev_regno
)
877 prev_regno
= REGNO (operands
[num_operands
]);
882 unsigned int prev_regno
= CONDITION_CODE_REGNUM
;
884 while (num_operands
--)
886 if (GET_CODE (operands
[num_operands
]) != REG
)
889 if (REGNO (operands
[num_operands
]) > prev_regno
)
892 prev_regno
= REGNO (operands
[num_operands
]);
900 fr30_const_double_is_zero (rtx operand
)
904 if (operand
== NULL
|| GET_CODE (operand
) != CONST_DOUBLE
)
907 REAL_VALUE_FROM_CONST_DOUBLE (d
, operand
);
909 return REAL_VALUES_EQUAL (d
, dconst0
);
913 /*{{{ Instruction Output Routines */
915 /* Output a double word move.
916 It must be REG<-REG, REG<-MEM, MEM<-REG or REG<-CONST.
917 On the FR30 we are constrained by the fact that it does not
918 support offsetable addresses, and so we have to load the
919 address of the secnd word into the second destination register
920 before we can use it. */
923 fr30_move_double (rtx
* operands
)
925 rtx src
= operands
[1];
926 rtx dest
= operands
[0];
927 enum rtx_code src_code
= GET_CODE (src
);
928 enum rtx_code dest_code
= GET_CODE (dest
);
929 machine_mode mode
= GET_MODE (dest
);
934 if (dest_code
== REG
)
938 int reverse
= (REGNO (dest
) == REGNO (src
) + 1);
940 /* We normally copy the low-numbered register first. However, if
941 the first register of operand 0 is the same as the second register
942 of operand 1, we must copy in the opposite order. */
943 emit_insn (gen_rtx_SET (operand_subword (dest
, reverse
, TRUE
, mode
),
944 operand_subword (src
, reverse
, TRUE
, mode
)));
947 (gen_rtx_SET (operand_subword (dest
, !reverse
, TRUE
, mode
),
948 operand_subword (src
, !reverse
, TRUE
, mode
)));
950 else if (src_code
== MEM
)
952 rtx addr
= XEXP (src
, 0);
953 rtx dest0
= operand_subword (dest
, 0, TRUE
, mode
);
954 rtx dest1
= operand_subword (dest
, 1, TRUE
, mode
);
957 gcc_assert (GET_CODE (addr
) == REG
);
959 /* Copy the address before clobbering it. See PR 34174. */
960 emit_insn (gen_rtx_SET (dest1
, addr
));
961 emit_insn (gen_rtx_SET (dest0
, adjust_address (src
, SImode
, 0)));
962 emit_insn (gen_rtx_SET (dest1
, plus_constant (SImode
, dest1
,
965 new_mem
= gen_rtx_MEM (SImode
, dest1
);
966 MEM_COPY_ATTRIBUTES (new_mem
, src
);
968 emit_insn (gen_rtx_SET (dest1
, new_mem
));
970 else if (src_code
== CONST_INT
|| src_code
== CONST_DOUBLE
)
973 split_double (src
, &words
[0], &words
[1]);
974 emit_insn (gen_rtx_SET (operand_subword (dest
, 0, TRUE
, mode
),
977 emit_insn (gen_rtx_SET (operand_subword (dest
, 1, TRUE
, mode
),
981 else if (src_code
== REG
&& dest_code
== MEM
)
983 rtx addr
= XEXP (dest
, 0);
987 gcc_assert (GET_CODE (addr
) == REG
);
989 src0
= operand_subword (src
, 0, TRUE
, mode
);
990 src1
= operand_subword (src
, 1, TRUE
, mode
);
992 emit_move_insn (adjust_address (dest
, SImode
, 0), src0
);
994 if (REGNO (addr
) == STACK_POINTER_REGNUM
995 || REGNO (addr
) == FRAME_POINTER_REGNUM
)
996 emit_insn (gen_rtx_SET (adjust_address (dest
, SImode
, UNITS_PER_WORD
),
1001 rtx scratch_reg_r0
= gen_rtx_REG (SImode
, 0);
1003 /* We need a scratch register to hold the value of 'address + 4'.
1004 We use r0 for this purpose. It is used for example for long
1005 jumps and is already marked to not be used by normal register
1007 emit_insn (gen_movsi_internal (scratch_reg_r0
, addr
));
1008 emit_insn (gen_addsi_small_int (scratch_reg_r0
, scratch_reg_r0
,
1009 GEN_INT (UNITS_PER_WORD
)));
1010 new_mem
= gen_rtx_MEM (SImode
, scratch_reg_r0
);
1011 MEM_COPY_ATTRIBUTES (new_mem
, dest
);
1012 emit_move_insn (new_mem
, src1
);
1013 emit_insn (gen_blockage ());
1017 /* This should have been prevented by the constraints on movdi_insn. */
1026 /* Implement TARGET_FRAME_POINTER_REQUIRED. */
1029 fr30_frame_pointer_required (void)
1031 return (flag_omit_frame_pointer
== 0 || crtl
->args
.pretend_args_size
> 0);
1035 /*{{{ Trampoline Output Routines */
1037 /* Implement TARGET_ASM_TRAMPOLINE_TEMPLATE.
1038 On the FR30, the trampoline is:
1046 The no-ops are to guarantee that the static chain and final
1047 target are 32 bit aligned within the trampoline. That allows us to
1048 initialize those locations with simple SImode stores. The alternative
1049 would be to use HImode stores. */
1052 fr30_asm_trampoline_template (FILE *f
)
1054 fprintf (f
, "\tnop\n");
1055 fprintf (f
, "\tldi:32\t#0, %s\n", reg_names
[STATIC_CHAIN_REGNUM
]);
1056 fprintf (f
, "\tnop\n");
1057 fprintf (f
, "\tldi:32\t#0, %s\n", reg_names
[COMPILER_SCRATCH_REGISTER
]);
1058 fprintf (f
, "\tjmp\t@%s\n", reg_names
[COMPILER_SCRATCH_REGISTER
]);
1061 /* Implement TARGET_TRAMPOLINE_INIT. */
1064 fr30_trampoline_init (rtx m_tramp
, tree fndecl
, rtx chain_value
)
1066 rtx fnaddr
= XEXP (DECL_RTL (fndecl
), 0);
1069 emit_block_move (m_tramp
, assemble_trampoline_template (),
1070 GEN_INT (TRAMPOLINE_SIZE
), BLOCK_OP_NORMAL
);
1072 mem
= adjust_address (m_tramp
, SImode
, 4);
1073 emit_move_insn (mem
, chain_value
);
1074 mem
= adjust_address (m_tramp
, SImode
, 12);
1075 emit_move_insn (mem
, fnaddr
);
1079 /* Local Variables: */
1080 /* folded-file: t */