1 /* Definitions for GCC. Part of the machine description for CRIS.
2 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
3 Contributed by Axis Communications. Written by Hans-Peter Nilsson.
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 2, 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 COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include "coretypes.h"
28 #include "hard-reg-set.h"
30 #include "insn-config.h"
31 #include "conditions.h"
32 #include "insn-attr.h"
44 #include "target-def.h"
47 /* Usable when we have an amount to add or subtract, and want the
48 optimal size of the insn. */
49 #define ADDITIVE_SIZE_MODIFIER(size) \
50 ((size) <= 63 ? "q" : (size) <= 255 ? "u.b" : (size) <= 65535 ? "u.w" : ".d")
52 #define ASSERT_PLT_UNSPEC(x) \
55 if (XEXP (x, 1) != NULL_RTX \
56 || (GET_CODE (XVECEXP (x, 0, 0)) != SYMBOL_REF \
57 && GET_CODE (XVECEXP (x, 0, 0)) != LABEL_REF)) \
61 #define LOSE_AND_RETURN(msgid, x) \
64 cris_operand_lossage (msgid, x); \
68 /* Per-function machine data. */
69 struct machine_function
GTY(())
71 int needs_return_address_on_stack
;
74 /* This little fix suppresses the 'u' or 's' when '%e' in assembly
76 static char cris_output_insn_is_bound
= 0;
78 /* This one suppresses printing out the "rPIC+" in
79 "rPIC+sym:GOTOFF+offset" when doing PIC. For a PLT symbol, it
80 suppresses outputting it as [rPIC+sym:GOTPLT] and outputs similarly
81 just the "sym:GOTOFF" part. */
82 static int cris_pic_sympart_only
= 0;
84 /* Fix for reg_overlap_mentioned_p. */
85 static int cris_reg_overlap_mentioned_p
PARAMS ((rtx
, rtx
));
87 static void cris_print_base
PARAMS ((rtx
, FILE *));
89 static void cris_print_index
PARAMS ((rtx
, FILE *));
91 static struct machine_function
* cris_init_machine_status
PARAMS ((void));
93 static int cris_initial_frame_pointer_offset
PARAMS ((void));
95 static int saved_regs_mentioned
PARAMS ((rtx
));
97 static void cris_target_asm_function_prologue
98 PARAMS ((FILE *, HOST_WIDE_INT
));
100 static void cris_target_asm_function_epilogue
101 PARAMS ((FILE *, HOST_WIDE_INT
));
103 static void cris_operand_lossage
PARAMS ((const char *, rtx
));
105 static void cris_asm_output_mi_thunk
106 PARAMS ((FILE *, tree
, HOST_WIDE_INT
, HOST_WIDE_INT
, tree
));
108 static bool cris_rtx_costs
PARAMS ((rtx
, int, int, int *));
109 static int cris_address_cost
PARAMS ((rtx
));
111 /* The function cris_target_asm_function_epilogue puts the last insn to
112 output here. It always fits; there won't be a symbol operand. Used in
113 delay_slots_for_epilogue and function_epilogue. */
114 static char save_last
[80];
116 /* This is the argument from the "-max-stack-stackframe=" option. */
117 const char *cris_max_stackframe_str
;
119 /* This is the argument from the "-march=" option. */
120 const char *cris_cpu_str
;
122 /* This is the argument from the "-mtune=" option. */
123 const char *cris_tune_str
;
125 /* This is the argument from the "-melinux-stacksize=" option. */
126 const char *cris_elinux_stacksize_str
;
128 /* This is the parsed result of the "-max-stack-stackframe=" option. If
129 it (still) is zero, then there was no such option given. */
130 int cris_max_stackframe
= 0;
132 /* This is the parsed result of the "-march=" option, if given. */
133 int cris_cpu_version
= CRIS_DEFAULT_CPU_VERSION
;
135 #undef TARGET_ASM_ALIGNED_HI_OP
136 #define TARGET_ASM_ALIGNED_HI_OP "\t.word\t"
137 #undef TARGET_ASM_ALIGNED_SI_OP
138 #define TARGET_ASM_ALIGNED_SI_OP "\t.dword\t"
139 #undef TARGET_ASM_ALIGNED_DI_OP
140 #define TARGET_ASM_ALIGNED_DI_OP "\t.quad\t"
142 /* We need to define these, since the 2byte, 4byte, 8byte op:s are only
143 available in ELF. These "normal" pseudos do not have any alignment
144 constraints or side-effects. */
145 #undef TARGET_ASM_UNALIGNED_HI_OP
146 #define TARGET_ASM_UNALIGNED_HI_OP TARGET_ASM_ALIGNED_HI_OP
148 #undef TARGET_ASM_UNALIGNED_SI_OP
149 #define TARGET_ASM_UNALIGNED_SI_OP TARGET_ASM_ALIGNED_SI_OP
151 #undef TARGET_ASM_UNALIGNED_DI_OP
152 #define TARGET_ASM_UNALIGNED_DI_OP TARGET_ASM_ALIGNED_DI_OP
154 #undef TARGET_ASM_FUNCTION_PROLOGUE
155 #define TARGET_ASM_FUNCTION_PROLOGUE cris_target_asm_function_prologue
157 #undef TARGET_ASM_FUNCTION_EPILOGUE
158 #define TARGET_ASM_FUNCTION_EPILOGUE cris_target_asm_function_epilogue
160 #undef TARGET_ASM_OUTPUT_MI_THUNK
161 #define TARGET_ASM_OUTPUT_MI_THUNK cris_asm_output_mi_thunk
162 #undef TARGET_ASM_CAN_OUTPUT_MI_THUNK
163 #define TARGET_ASM_CAN_OUTPUT_MI_THUNK default_can_output_mi_thunk_no_vcall
165 #undef TARGET_RTX_COSTS
166 #define TARGET_RTX_COSTS cris_rtx_costs
167 #undef TARGET_ADDRESS_COST
168 #define TARGET_ADDRESS_COST cris_address_cost
170 struct gcc_target targetm
= TARGET_INITIALIZER
;
172 /* Predicate functions. */
174 /* This checks a part of an address, the one that is not a plain register
175 for an addressing mode using BDAP.
176 Allowed operands is either:
178 b) a CONST operand (but not a symbol when generating PIC)
179 c) a [r] or [r+] in SImode, or sign-extend from HI or QI. */
182 cris_bdap_operand (op
, mode
)
184 enum machine_mode mode
;
186 register enum rtx_code code
= GET_CODE (op
);
188 if (mode
!= SImode
&& (mode
!= VOIDmode
|| GET_MODE (op
) != VOIDmode
))
191 /* Just return whether this is a simple register or constant. */
192 if (register_operand (op
, mode
)
193 || (CONSTANT_P (op
) && !(flag_pic
&& cris_symbol (op
))))
196 /* Is it a [r] or possibly a [r+]? */
199 rtx tem
= XEXP (op
, 0);
202 && (register_operand (tem
, SImode
)
203 || (GET_CODE (tem
) == POST_INC
204 && register_operand (XEXP (tem
, 0), SImode
))))
210 /* Perhaps a sign-extended mem: [r].(b|w) or [r+].(b|w)? */
211 if (code
== SIGN_EXTEND
)
213 rtx tem
= XEXP (op
, 0);
215 if (GET_CODE (tem
) != MEM
)
220 && (register_operand (tem
, SImode
)
221 || (GET_CODE (tem
) == POST_INC
222 && register_operand (XEXP (tem
, 0), SImode
))))
231 /* This is similar to cris_bdap_operand:
232 It checks a part of an address, the one that is not a plain register
233 for an addressing mode using BDAP *or* BIAP.
234 Allowed operands is either:
236 b) a CONST operand (but not a symbol when generating PIC)
237 c) a mult of (1, 2 or 4) and a register
238 d) a [r] or [r+] in SImode, or sign-extend from HI or QI. */
241 cris_bdap_biap_operand (op
, mode
)
243 enum machine_mode mode
;
245 register enum rtx_code code
= GET_CODE (op
);
249 /* Check for bdap operand. */
250 if (cris_bdap_operand (op
, mode
))
253 if (mode
!= SImode
&& (mode
!= VOIDmode
|| GET_MODE (op
) != VOIDmode
))
256 /* Check that we're looking at a BIAP operand. */
260 /* Canonicalize register and multiplicand. */
261 if (GET_CODE (XEXP (op
, 0)) == CONST_INT
)
272 /* Check that the operands are correct after canonicalization. */
273 if (! register_operand (reg
, SImode
) || GET_CODE (val
) != CONST_INT
)
276 /* Check that the multiplicand has a valid value. */
278 && (INTVAL (val
) == 1 || INTVAL (val
) == 2 || INTVAL (val
) == 4)))
284 /* Check if MODE is same as mode for X, and X is PLUS, MINUS, IOR or
288 cris_orthogonal_operator (x
, mode
)
290 enum machine_mode mode
;
292 enum rtx_code code
= GET_CODE (x
);
294 if (mode
== VOIDmode
)
297 return (GET_MODE (x
) == mode
298 && (code
== PLUS
|| code
== MINUS
299 || code
== IOR
|| code
== AND
|| code
== UMIN
));
302 /* Check if MODE is same as mode for X, and X is PLUS, IOR or AND or
306 cris_commutative_orth_op (x
, mode
)
308 enum machine_mode mode
;
310 enum rtx_code code
= GET_CODE (x
);
312 if (mode
== VOIDmode
)
315 return (GET_MODE (x
) == mode
&&
317 || code
== IOR
|| code
== AND
|| code
== UMIN
));
320 /* Check if MODE is same as mode for X, and X is PLUS or MINUS or UMIN. */
323 cris_operand_extend_operator (x
, mode
)
325 enum machine_mode mode
;
327 enum rtx_code code
= GET_CODE (x
);
329 if (mode
== VOIDmode
)
332 return (GET_MODE (x
) == mode
333 && (code
== PLUS
|| code
== MINUS
|| code
== UMIN
));
336 /* Check if MODE is same as mode for X, and X is PLUS or MINUS. */
339 cris_additive_operand_extend_operator (x
, mode
)
341 enum machine_mode mode
;
343 enum rtx_code code
= GET_CODE (x
);
345 if (mode
== VOIDmode
)
348 return (GET_MODE (x
) == mode
349 && (code
== PLUS
|| code
== MINUS
));
352 /* Check to see if MODE is same as mode for X, and X is SIGN_EXTEND or
356 cris_extend_operator (x
, mode
)
358 enum machine_mode mode
;
360 enum rtx_code code
= GET_CODE (x
);
362 if (mode
== VOIDmode
)
366 (GET_MODE (x
) == mode
&& (code
== SIGN_EXTEND
|| code
== ZERO_EXTEND
));
369 /* Check to see if MODE is same as mode for X, and X is PLUS or BOUND. */
372 cris_plus_or_bound_operator (x
, mode
)
374 enum machine_mode mode
;
376 enum rtx_code code
= GET_CODE (x
);
378 if (mode
== VOIDmode
)
382 (GET_MODE (x
) == mode
&& (code
== UMIN
|| code
== PLUS
));
385 /* Since with -fPIC, not all symbols are valid PIC symbols or indeed
386 general_operands, we have to have a predicate that matches it for the
390 cris_general_operand_or_symbol (op
, mode
)
392 enum machine_mode mode
;
394 return general_operand (op
, mode
)
395 || (CONSTANT_P (op
) && cris_symbol (op
));
398 /* Since a PIC symbol without a GOT entry is not a general_operand, we
399 have to have a predicate that matches it. We use this in the expanded
400 "movsi" anonymous pattern for PIC symbols. */
403 cris_general_operand_or_gotless_symbol (op
, mode
)
405 enum machine_mode mode
;
407 return general_operand (op
, mode
)
408 || (CONSTANT_P (op
) && cris_gotless_symbol (op
));
411 /* Since a PLT symbol is not a general_operand, we have to have a
412 predicate that matches it when we need it. We use this in the expanded
413 "call" and "call_value" anonymous patterns. */
416 cris_general_operand_or_plt_symbol (op
, mode
)
418 enum machine_mode mode
;
420 return general_operand (op
, mode
)
421 || (GET_CODE (op
) == CONST
422 && GET_CODE (XEXP (op
, 0)) == UNSPEC
423 && !TARGET_AVOID_GOTPLT
);
426 /* This matches a (MEM (general_operand)) or
427 (MEM (cris_general_operand_or_symbol)). The second one isn't a valid
428 memory_operand, so we need this predicate to recognize call
429 destinations before we change them to a PLT operand (by wrapping in
433 cris_mem_call_operand (op
, mode
)
435 enum machine_mode mode
;
439 if (GET_CODE (op
) != MEM
)
442 if (memory_operand (op
, mode
))
447 return cris_general_operand_or_symbol (xmem
, GET_MODE (op
));
450 /* The CONDITIONAL_REGISTER_USAGE worker. */
453 cris_conditional_register_usage ()
455 /* FIXME: This isn't nice. We should be able to use that register for
456 something else if the PIC table isn't needed. */
458 fixed_regs
[PIC_OFFSET_TABLE_REGNUM
]
459 = call_used_regs
[PIC_OFFSET_TABLE_REGNUM
] = 1;
462 /* Return current_function_uses_pic_offset_table. For use in cris.md,
463 since some generated files do not include function.h. */
466 cris_cfun_uses_pic_table ()
468 return current_function_uses_pic_offset_table
;
471 /* Given an rtx, return the text string corresponding to the CODE of X.
472 Intended for use in the assembly language output section of a
479 cris_output_insn_is_bound
= 0;
480 switch (GET_CODE (x
))
527 /* Used to control the sign/zero-extend character for the 'e' modifier.
529 cris_output_insn_is_bound
= 1;
534 return "Unknown operator";
539 /* Emit an error message when we're in an asm, and a fatal error for
540 "normal" insns. Formatted output isn't easily implemented, since we
541 use output_operand_lossage to output the actual message and handle the
542 categorization of the error. */
545 cris_operand_lossage (msgid
, op
)
550 output_operand_lossage ("%s", msgid
);
553 /* Print an index part of an address to file. */
556 cris_print_index (index
, file
)
560 rtx inner
= XEXP (index
, 0);
562 /* Make the index "additive" unless we'll output a negative number, in
563 which case the sign character is free (as in free beer). */
564 if (GET_CODE (index
) != CONST_INT
|| INTVAL (index
) >= 0)
568 fprintf (file
, "$%s.b", reg_names
[REGNO (index
)]);
569 else if (CONSTANT_P (index
))
570 cris_output_addr_const (file
, index
);
571 else if (GET_CODE (index
) == MULT
)
573 fprintf (file
, "$%s.",
574 reg_names
[REGNO (XEXP (index
, 0))]);
576 putc (INTVAL (XEXP (index
, 1)) == 2 ? 'w' : 'd', file
);
578 else if (GET_CODE (index
) == SIGN_EXTEND
&&
579 GET_CODE (inner
) == MEM
)
581 rtx inner_inner
= XEXP (inner
, 0);
583 if (GET_CODE (inner_inner
) == POST_INC
)
585 fprintf (file
, "[$%s+].",
586 reg_names
[REGNO (XEXP (inner_inner
, 0))]);
587 putc (GET_MODE (inner
) == HImode
? 'w' : 'b', file
);
591 fprintf (file
, "[$%s].", reg_names
[REGNO (inner_inner
)]);
593 putc (GET_MODE (inner
) == HImode
? 'w' : 'b', file
);
596 else if (GET_CODE (index
) == MEM
)
598 if (GET_CODE (inner
) == POST_INC
)
599 fprintf (file
, "[$%s+].d", reg_names
[REGNO (XEXP (inner
, 0))]);
601 fprintf (file
, "[$%s].d", reg_names
[REGNO (inner
)]);
604 cris_operand_lossage ("unexpected index-type in cris_print_index",
608 /* Print a base rtx of an address to file. */
611 cris_print_base (base
, file
)
616 fprintf (file
, "$%s", reg_names
[REGNO (base
)]);
617 else if (GET_CODE (base
) == POST_INC
)
618 fprintf (file
, "$%s+", reg_names
[REGNO (XEXP (base
, 0))]);
620 cris_operand_lossage ("unexpected base-type in cris_print_base",
624 /* Usable as a guard in expressions. */
630 internal_error (arg
);
632 /* We'll never get here; this is just to appease compilers. */
636 /* Textual function prologue. */
639 cris_target_asm_function_prologue (file
, size
)
645 /* Shorten the used name for readability. */
646 int cfoa_size
= current_function_outgoing_args_size
;
647 int last_movem_reg
= -1;
648 int doing_dwarf
= dwarf2out_do_frame ();
650 int faked_args_size
= 0;
651 int cfa_write_offset
= 0;
652 char *cfa_label
= NULL
;
653 int return_address_on_stack
654 = regs_ever_live
[CRIS_SRP_REGNUM
]
655 || cfun
->machine
->needs_return_address_on_stack
!= 0;
657 /* Don't do anything if no prologues or epilogues are wanted. */
658 if (!TARGET_PROLOGUE_EPILOGUE
)
664 /* Align the size to what's best for the CPU model. */
665 if (TARGET_STACK_ALIGN
)
666 size
= TARGET_ALIGN_BY_32
? (size
+ 3) & ~3 : (size
+ 1) & ~1;
668 if (current_function_pretend_args_size
)
670 int pretend
= current_function_pretend_args_size
;
671 for (regno
= CRIS_FIRST_ARG_REG
+ CRIS_MAX_ARGS_IN_REGS
- 1;
673 regno
--, pretend
-= 4)
675 fprintf (file
, "\tpush $%s\n", reg_names
[regno
]);
676 faked_args_size
+= 4;
680 framesize
= faked_args_size
;
684 /* FIXME: Slightly redundant calculation, as we do the same in
685 pieces below. This offset must be the total adjustment of the
686 stack-pointer. We can then def_cfa call at the end of this
687 function with the current implementation of execute_cfa_insn, but
688 that wouldn't really be clean. */
692 + (return_address_on_stack
? 4 : 0)
693 + (frame_pointer_needed
? 4 : 0);
697 if (frame_pointer_needed
)
698 cfa_reg
= FRAME_POINTER_REGNUM
;
701 cfa_reg
= STACK_POINTER_REGNUM
;
702 cfa_offset
+= cris_initial_frame_pointer_offset ();
705 cfa_label
= dwarf2out_cfi_label ();
706 dwarf2out_def_cfa (cfa_label
, cfa_reg
, cfa_offset
);
708 cfa_write_offset
= - faked_args_size
- 4;
711 /* Save SRP if not a leaf function. */
712 if (return_address_on_stack
)
714 fprintf (file
, "\tPush $srp\n");
719 dwarf2out_return_save (cfa_label
, cfa_write_offset
);
720 cfa_write_offset
-= 4;
724 /* Set up frame pointer if needed. */
725 if (frame_pointer_needed
)
727 fprintf (file
, "\tpush $%s\n\tmove.d $sp,$%s\n",
728 reg_names
[FRAME_POINTER_REGNUM
],
729 reg_names
[FRAME_POINTER_REGNUM
]);
734 dwarf2out_reg_save (cfa_label
, FRAME_POINTER_REGNUM
,
736 cfa_write_offset
-= 4;
740 /* Local vars are located above saved regs. */
741 cfa_write_offset
-= size
;
743 /* Get a contiguous sequence of registers, starting with r0, that need
745 for (regno
= 0; regno
< FIRST_PSEUDO_REGISTER
; regno
++)
747 if ((((regs_ever_live
[regno
]
748 && !call_used_regs
[regno
])
749 || (regno
== (int) PIC_OFFSET_TABLE_REGNUM
750 && (current_function_uses_pic_offset_table
751 /* It is saved anyway, if there would be a gap. */
753 && regs_ever_live
[regno
+ 1]
754 && !call_used_regs
[regno
+ 1]))))
755 && (regno
!= FRAME_POINTER_REGNUM
|| !frame_pointer_needed
)
756 && regno
!= CRIS_SRP_REGNUM
)
757 || (current_function_calls_eh_return
758 && (regno
== EH_RETURN_DATA_REGNO (0)
759 || regno
== EH_RETURN_DATA_REGNO (1)
760 || regno
== EH_RETURN_DATA_REGNO (2)
761 || regno
== EH_RETURN_DATA_REGNO (3))))
763 /* Check if movem may be used for registers so far. */
764 if (regno
== last_movem_reg
+ 1)
765 /* Yes, update next expected register. */
769 /* We cannot use movem for all registers. We have to flush
770 any movem:ed registers we got so far. */
771 if (last_movem_reg
!= -1)
773 /* It is a win to use a side-effect assignment for
774 64 <= size <= 128. But side-effect on movem was
775 not usable for CRIS v0..3. Also only do it if
776 side-effects insns are allowed. */
777 if ((last_movem_reg
+ 1) * 4 + size
>= 64
778 && (last_movem_reg
+ 1) * 4 + size
<= 128
779 && cris_cpu_version
>= CRIS_CPU_SVINTO
780 && TARGET_SIDE_EFFECT_PREFIXES
)
781 fprintf (file
, "\tmovem $%s,[$sp=$sp-"HOST_WIDE_INT_PRINT_DEC
"]\n",
782 reg_names
[last_movem_reg
],
783 (last_movem_reg
+ 1) * 4 + size
);
786 /* Avoid printing multiple subsequent sub:s for sp. */
787 fprintf (file
, "\tsub%s "HOST_WIDE_INT_PRINT_DEC
",$sp\n",
788 ADDITIVE_SIZE_MODIFIER ((last_movem_reg
+ 1)
790 (last_movem_reg
+ 1) * 4 + size
);
792 fprintf (file
, "\tmovem $%s,[$sp]\n",
793 reg_names
[last_movem_reg
]);
796 framesize
+= (last_movem_reg
+ 1) * 4 + size
;
799 fprintf (file
, "; frame "HOST_WIDE_INT_PRINT_DEC
800 ", #regs %d, bytes %d args %d\n",
803 (last_movem_reg
+ 1) * 4,
804 current_function_args_size
);
811 /* Local vars on stack, but there are no movem:s.
812 Just allocate space. */
813 fprintf (file
, "\tSub%s "HOST_WIDE_INT_PRINT_DEC
",$sp\n",
814 ADDITIVE_SIZE_MODIFIER (size
),
820 fprintf (file
, "\tPush $%s\n", reg_names
[regno
]);
826 /* Registers are stored lowest numbered at highest address,
827 which matches the loop order; we just need to update the
829 dwarf2out_reg_save (cfa_label
, regno
, cfa_write_offset
);
830 cfa_write_offset
-= 4;
835 /* Check after, if we can movem all registers. This is the normal
837 if (last_movem_reg
!= -1)
839 /* Side-effect assignment on movem was not supported for CRIS v0..3,
840 and don't do it if we're asked not to.
842 The movem is already accounted for, for unwind. */
844 if ((last_movem_reg
+ 1) * 4 + size
>= 64
845 && (last_movem_reg
+ 1) * 4 + size
<= 128
846 && cris_cpu_version
>= CRIS_CPU_SVINTO
847 && TARGET_SIDE_EFFECT_PREFIXES
)
848 fprintf (file
, "\tmovem $%s,[$sp=$sp-"HOST_WIDE_INT_PRINT_DEC
"]\n",
849 reg_names
[last_movem_reg
],
850 (last_movem_reg
+1) * 4 + size
);
853 /* Avoid printing multiple subsequent sub:s for sp. FIXME:
854 Clean up the conditional expression. */
855 fprintf (file
, "\tsub%s "HOST_WIDE_INT_PRINT_DEC
",$sp\n",
856 ADDITIVE_SIZE_MODIFIER ((last_movem_reg
+ 1) * 4 + size
),
857 (last_movem_reg
+ 1) * 4 + size
);
858 /* To be compatible with v0..v3 means we do not use an assignment
859 addressing mode with movem. We normally don't need that
860 anyway. It would only be slightly more efficient for 64..128
862 fprintf (file
, "\tmovem $%s,[$sp]\n", reg_names
[last_movem_reg
]);
865 framesize
+= (last_movem_reg
+ 1) * 4 + size
;
868 fprintf (file
, "; frame "HOST_WIDE_INT_PRINT_DEC
869 ", #regs %d, bytes %d args %d\n",
872 (last_movem_reg
+ 1) * 4,
873 current_function_args_size
);
875 /* We have to put outgoing argument space after regs. */
878 /* This does not need to be accounted for, for unwind. */
880 fprintf (file
, "\tSub%s %d,$sp\n",
881 ADDITIVE_SIZE_MODIFIER (cfoa_size
),
883 framesize
+= cfoa_size
;
886 else if ((size
+ cfoa_size
) > 0)
888 /* This does not need to be accounted for, for unwind. */
890 /* Local vars on stack, and we could not use movem. Add a sub here. */
891 fprintf (file
, "\tSub%s "HOST_WIDE_INT_PRINT_DEC
",$sp\n",
892 ADDITIVE_SIZE_MODIFIER (size
+ cfoa_size
),
894 framesize
+= size
+ cfoa_size
;
897 /* Set up the PIC register. */
898 if (current_function_uses_pic_offset_table
)
899 fprintf (file
, "\tmove.d $pc,$%s\n\tsub.d .:GOTOFF,$%s\n",
900 reg_names
[PIC_OFFSET_TABLE_REGNUM
],
901 reg_names
[PIC_OFFSET_TABLE_REGNUM
]);
905 "; parm #%d @ %d; frame " HOST_WIDE_INT_PRINT_DEC
906 ", FP-SP is %d; leaf: %s%s; fp %s, outg: %d arg %d\n",
907 CRIS_MAX_ARGS_IN_REGS
+ 1, FIRST_PARM_OFFSET (0),
909 cris_initial_frame_pointer_offset (),
910 leaf_function_p () ? "yes" : "no",
911 return_address_on_stack
? "no" :"yes",
912 frame_pointer_needed
? "yes" : "no",
913 cfoa_size
, current_function_args_size
);
915 if (cris_max_stackframe
&& framesize
> cris_max_stackframe
)
916 warning ("stackframe too big: %d bytes", framesize
);
919 /* Return nonzero if there are regs mentioned in the insn that are not all
920 in the call_used regs. This is part of the decision whether an insn
921 can be put in the epilogue. */
924 saved_regs_mentioned (x
)
931 /* Mainly stolen from refers_to_regno_p in rtlanal.c. */
939 return !call_used_regs
[i
];
942 /* If this is a SUBREG of a hard reg, we can see exactly which
943 registers are being modified. Otherwise, handle normally. */
944 i
= REGNO (SUBREG_REG (x
));
945 return !call_used_regs
[i
];
951 fmt
= GET_RTX_FORMAT (code
);
952 for (i
= GET_RTX_LENGTH (code
) - 1; i
>= 0; i
--)
956 if (saved_regs_mentioned (XEXP (x
, i
)))
959 else if (fmt
[i
] == 'E')
962 for (j
= XVECLEN (x
, i
) - 1; j
>=0; j
--)
963 if (saved_regs_mentioned (XEXP (x
, i
)))
971 /* Figure out if the insn may be put in the epilogue. */
974 cris_eligible_for_epilogue_delay (insn
)
977 /* First of all, it must be as slottable as for a delayed branch insn. */
978 if (get_attr_slottable (insn
) != SLOTTABLE_YES
)
981 /* It must not refer to the stack pointer (may be valid for some cases
982 that I can't think of). */
983 if (reg_mentioned_p (stack_pointer_rtx
, PATTERN (insn
)))
986 /* The frame pointer will be restored in the epilogue, before the
987 "ret", so it can't be referred to. */
988 if (frame_pointer_needed
989 && reg_mentioned_p (frame_pointer_rtx
, PATTERN (insn
)))
992 /* All saved regs are restored before the delayed insn.
993 This means that we cannot have any instructions that mention the
994 registers that are restored by the epilogue. */
995 if (saved_regs_mentioned (PATTERN (insn
)))
998 /* It seems to be ok. */
1002 /* Return the number of delay-slots in the epilogue: return 1 if it
1003 contains "ret", else 0. */
1006 cris_delay_slots_for_epilogue ()
1008 /* Check if we use a return insn, which we only do for leaf functions.
1009 Else there is no slot to fill. */
1010 if (regs_ever_live
[CRIS_SRP_REGNUM
]
1011 || cfun
->machine
->needs_return_address_on_stack
!= 0)
1014 /* By calling function_epilogue with the same parameters as from gcc
1015 we can get info about if the epilogue can fill the delay-slot by itself.
1016 If it is filled from the epilogue, then the corresponding string
1018 This depends on that the "size" argument to function_epilogue
1019 always is get_frame_size.
1020 FIXME: Kludgy. At least make it a separate function that is not
1021 misnamed or abuses the stream parameter. */
1022 cris_target_asm_function_epilogue (NULL
, get_frame_size ());
1029 /* Textual function epilogue. When file is NULL, it serves doubly as
1030 a test for whether the epilogue can fill any "ret" delay-slots by
1031 itself by storing the delay insn in save_last. */
1034 cris_target_asm_function_epilogue (file
, size
)
1039 int last_movem_reg
= -1;
1040 rtx insn
= get_last_insn ();
1041 int argspace_offset
= current_function_outgoing_args_size
;
1042 int pretend
= current_function_pretend_args_size
;
1043 int return_address_on_stack
1044 = regs_ever_live
[CRIS_SRP_REGNUM
]
1045 || cfun
->machine
->needs_return_address_on_stack
!= 0;
1049 if (file
&& !TARGET_PROLOGUE_EPILOGUE
)
1052 if (TARGET_PDEBUG
&& file
)
1053 fprintf (file
, ";;\n");
1055 /* Align byte count of stack frame. */
1056 if (TARGET_STACK_ALIGN
)
1057 size
= TARGET_ALIGN_BY_32
? (size
+ 3) & ~3 : (size
+ 1) & ~1;
1059 /* If the last insn was a BARRIER, we don't have to write any code,
1060 then all returns were covered by "return" insns. */
1061 if (GET_CODE (insn
) == NOTE
)
1062 insn
= prev_nonnote_insn (insn
);
1064 && (GET_CODE (insn
) == BARRIER
1065 /* We must make sure that the insn really is a "return" and
1066 not a conditional branch. Try to match the return exactly,
1067 and if it doesn't match, assume it is a conditional branch
1068 (and output an epilogue). */
1069 || (GET_CODE (insn
) == JUMP_INSN
1070 && GET_CODE (PATTERN (insn
)) == RETURN
)))
1072 if (TARGET_PDEBUG
&& file
)
1073 fprintf (file
, ";;;;;\n");
1077 /* Check how many saved regs we can movem. They start at r0 and must
1080 regno
< FIRST_PSEUDO_REGISTER
;
1082 if ((((regs_ever_live
[regno
]
1083 && !call_used_regs
[regno
])
1084 || (regno
== (int) PIC_OFFSET_TABLE_REGNUM
1085 && (current_function_uses_pic_offset_table
1086 /* It is saved anyway, if there would be a gap. */
1088 && regs_ever_live
[regno
+ 1]
1089 && !call_used_regs
[regno
+ 1]))))
1090 && (regno
!= FRAME_POINTER_REGNUM
|| !frame_pointer_needed
)
1091 && regno
!= CRIS_SRP_REGNUM
)
1092 || (current_function_calls_eh_return
1093 && (regno
== EH_RETURN_DATA_REGNO (0)
1094 || regno
== EH_RETURN_DATA_REGNO (1)
1095 || regno
== EH_RETURN_DATA_REGNO (2)
1096 || regno
== EH_RETURN_DATA_REGNO (3))))
1099 if (regno
== last_movem_reg
+ 1)
1105 for (regno
= FIRST_PSEUDO_REGISTER
- 1;
1106 regno
> last_movem_reg
;
1108 if ((((regs_ever_live
[regno
]
1109 && !call_used_regs
[regno
])
1110 || (regno
== (int) PIC_OFFSET_TABLE_REGNUM
1111 && (current_function_uses_pic_offset_table
1112 /* It is saved anyway, if there would be a gap. */
1114 && regs_ever_live
[regno
+ 1]
1115 && !call_used_regs
[regno
+ 1]))))
1116 && (regno
!= FRAME_POINTER_REGNUM
|| !frame_pointer_needed
)
1117 && regno
!= CRIS_SRP_REGNUM
)
1118 || (current_function_calls_eh_return
1119 && (regno
== EH_RETURN_DATA_REGNO (0)
1120 || regno
== EH_RETURN_DATA_REGNO (1)
1121 || regno
== EH_RETURN_DATA_REGNO (2)
1122 || regno
== EH_RETURN_DATA_REGNO (3))))
1124 if (argspace_offset
)
1126 /* There is an area for outgoing parameters located before
1127 the saved registers. We have to adjust for that. */
1129 fprintf (file
, "\tAdd%s %d,$sp\n",
1130 ADDITIVE_SIZE_MODIFIER (argspace_offset
),
1133 /* Make sure we only do this once. */
1134 argspace_offset
= 0;
1137 /* Flush previous non-movem:ed registers. */
1138 if (*save_last
&& file
)
1139 fprintf (file
, save_last
);
1140 sprintf (save_last
, "\tPop $%s\n", reg_names
[regno
]);
1143 if (last_movem_reg
!= -1)
1145 if (argspace_offset
)
1147 /* Adjust for the outgoing parameters area, if that's not
1149 if (*save_last
&& file
)
1151 fprintf (file
, save_last
);
1156 fprintf (file
, "\tAdd%s %d,$sp\n",
1157 ADDITIVE_SIZE_MODIFIER (argspace_offset
),
1159 argspace_offset
= 0;
1161 /* Flush previous non-movem:ed registers. */
1162 else if (*save_last
&& file
)
1163 fprintf (file
, save_last
);
1164 sprintf (save_last
, "\tmovem [$sp+],$%s\n", reg_names
[last_movem_reg
]);
1167 /* Restore frame pointer if necessary. */
1168 if (frame_pointer_needed
)
1170 if (*save_last
&& file
)
1171 fprintf (file
, save_last
);
1174 fprintf (file
, "\tmove.d $%s,$sp\n",
1175 reg_names
[FRAME_POINTER_REGNUM
]);
1176 sprintf (save_last
, "\tPop $%s\n",
1177 reg_names
[FRAME_POINTER_REGNUM
]);
1181 /* If there was no frame-pointer to restore sp from, we must
1182 explicitly deallocate local variables. */
1184 /* Handle space for outgoing parameters that hasn't been handled
1186 size
+= argspace_offset
;
1190 if (*save_last
&& file
)
1191 fprintf (file
, save_last
);
1193 sprintf (save_last
, "\tadd%s "HOST_WIDE_INT_PRINT_DEC
",$sp\n",
1194 ADDITIVE_SIZE_MODIFIER (size
), size
);
1197 /* If the size was not in the range for a "quick", we must flush
1202 fprintf (file
, save_last
);
1207 /* If this function has no pushed register parameters
1208 (stdargs/varargs), and if it is not a leaf function, then we can
1209 just jump-return here. */
1210 if (return_address_on_stack
&& pretend
== 0)
1212 if (*save_last
&& file
)
1213 fprintf (file
, save_last
);
1218 if (current_function_calls_eh_return
)
1220 /* The installed EH-return address is in *this* frame, so we
1221 need to pop it before we return. */
1222 fprintf (file
, "\tpop $srp\n");
1223 fprintf (file
, "\tret\n");
1224 fprintf (file
, "\tadd.d $%s,$sp\n", reg_names
[CRIS_STACKADJ_REG
]);
1227 fprintf (file
, "\tJump [$sp+]\n");
1229 /* Do a sanity check to avoid generating invalid code. */
1230 if (current_function_epilogue_delay_list
)
1231 internal_error ("allocated but unused delay list in epilogue");
1236 /* Rather than add current_function_calls_eh_return conditions
1237 everywhere in the following code (and not be able to test it
1238 thoroughly), assert the assumption that all usage of
1239 __builtin_eh_return are handled above. */
1240 if (current_function_calls_eh_return
)
1241 internal_error ("unexpected function type needing stack adjustment for\
1242 __builtin_eh_return");
1244 /* If we pushed some register parameters, then adjust the stack for
1248 /* Since srp is stored on the way, we need to restore it first. */
1249 if (return_address_on_stack
)
1251 if (*save_last
&& file
)
1252 fprintf (file
, save_last
);
1256 fprintf (file
, "\tpop $srp\n");
1259 if (*save_last
&& file
)
1260 fprintf (file
, save_last
);
1262 sprintf (save_last
, "\tadd%s %d,$sp\n",
1263 ADDITIVE_SIZE_MODIFIER (pretend
), pretend
);
1266 /* Here's where we have a delay-slot we need to fill. */
1267 if (file
&& current_function_epilogue_delay_list
)
1269 /* If gcc has allocated an insn for the epilogue delay slot, but
1270 things were arranged so we now thought we could do it
1271 ourselves, don't forget to flush that insn. */
1273 fprintf (file
, save_last
);
1275 fprintf (file
, "\tRet\n");
1277 /* Output the delay-slot-insn the mandated way. */
1278 final_scan_insn (XEXP (current_function_epilogue_delay_list
, 0),
1283 fprintf (file
, "\tRet\n");
1285 /* If the GCC did not do it, we have to use whatever insn we have,
1288 fprintf (file
, save_last
);
1290 fprintf (file
, "\tnOp\n");
1294 /* The PRINT_OPERAND worker. */
1297 cris_print_operand (file
, x
, code
)
1304 /* Size-strings corresponding to MULT expressions. */
1305 static const char *const mults
[] = { "BAD:0", ".b", ".w", "BAD:3", ".d" };
1307 /* New code entries should just be added to the switch below. If
1308 handling is finished, just return. If handling was just a
1309 modification of the operand, the modified operand should be put in
1310 "operand", and then do a break to let default handling
1311 (zero-modifier) output the operand. */
1316 /* Print the unsigned supplied integer as if it was signed
1317 and < 0, i.e print 255 or 65535 as -1, 254, 65534 as -2, etc. */
1318 if (GET_CODE (x
) != CONST_INT
1319 || ! CONST_OK_FOR_LETTER_P (INTVAL (x
), 'O'))
1320 LOSE_AND_RETURN ("invalid operand for 'b' modifier", x
);
1321 fprintf (file
, HOST_WIDE_INT_PRINT_DEC
,
1322 INTVAL (x
)| (INTVAL (x
) <= 255 ? ~255 : ~65535));
1326 /* Print assembler code for operator. */
1327 fprintf (file
, "%s", cris_op_str (operand
));
1331 /* Print the operand without the PIC register. */
1332 if (! flag_pic
|| ! CONSTANT_P (x
) || ! cris_gotless_symbol (x
))
1333 LOSE_AND_RETURN ("invalid operand for 'v' modifier", x
);
1334 cris_pic_sympart_only
++;
1335 cris_output_addr_const (file
, x
);
1336 cris_pic_sympart_only
--;
1340 /* Print the PIC register. Applied to a GOT-less PIC symbol for
1342 if (! flag_pic
|| ! CONSTANT_P (x
) || ! cris_gotless_symbol (x
))
1343 LOSE_AND_RETURN ("invalid operand for 'P' modifier", x
);
1344 fprintf (file
, "$%s", reg_names
[PIC_OFFSET_TABLE_REGNUM
]);
1348 /* Adjust a power of two to its log2. */
1349 if (GET_CODE (x
) != CONST_INT
|| exact_log2 (INTVAL (x
)) < 0 )
1350 LOSE_AND_RETURN ("invalid operand for 'p' modifier", x
);
1351 fprintf (file
, "%d", exact_log2 (INTVAL (x
)));
1355 /* For an integer, print 'b' or 'w' if <= 255 or <= 65535
1356 respectively. This modifier also terminates the inhibiting
1357 effects of the 'x' modifier. */
1358 cris_output_insn_is_bound
= 0;
1359 if (GET_MODE (x
) == VOIDmode
&& GET_CODE (x
) == CONST_INT
)
1361 if (INTVAL (x
) >= 0)
1363 if (INTVAL (x
) <= 255)
1365 else if (INTVAL (x
) <= 65535)
1375 /* For a non-integer, print the size of the operand. */
1376 putc ((GET_MODE (x
) == SImode
|| GET_MODE (x
) == SFmode
)
1377 ? 'd' : GET_MODE (x
) == HImode
? 'w'
1378 : GET_MODE (x
) == QImode
? 'b'
1379 /* If none of the above, emit an erroneous size letter. */
1385 /* Const_int: print b for -127 <= x <= 255,
1386 w for -32768 <= x <= 65535, else abort. */
1387 if (GET_CODE (x
) != CONST_INT
1388 || INTVAL (x
) < -32768 || INTVAL (x
) > 65535)
1389 LOSE_AND_RETURN ("invalid operand for 'z' modifier", x
);
1390 putc (INTVAL (x
) >= -128 && INTVAL (x
) <= 255 ? 'b' : 'w', file
);
1394 /* Output a 'nop' if there's nothing for the delay slot.
1395 This method stolen from the sparc files. */
1396 if (dbr_sequence_length () == 0)
1397 fputs ("\n\tnop", file
);
1401 /* Print high (most significant) part of something. */
1402 switch (GET_CODE (operand
))
1405 if (HOST_BITS_PER_WIDE_INT
== 32)
1406 /* Sign-extension from a normal int to a long long. */
1407 fprintf (file
, INTVAL (operand
) < 0 ? "-1" : "0");
1409 fprintf (file
, "0x%x", (unsigned int)(INTVAL (x
) >> 31 >> 1));
1413 /* High part of a long long constant. */
1414 if (GET_MODE (operand
) == VOIDmode
)
1416 fprintf (file
, HOST_WIDE_INT_PRINT_HEX
, CONST_DOUBLE_HIGH (x
));
1420 LOSE_AND_RETURN ("invalid operand for 'H' modifier", x
);
1423 /* Print reg + 1. Check that there's not an attempt to print
1424 high-parts of registers like stack-pointer or higher. */
1425 if (REGNO (operand
) > STACK_POINTER_REGNUM
- 2)
1426 LOSE_AND_RETURN ("bad register", operand
);
1427 fprintf (file
, "$%s", reg_names
[REGNO (operand
) + 1]);
1431 /* Adjust memory address to high part. */
1433 rtx adj_mem
= operand
;
1435 = GET_MODE_BITSIZE (GET_MODE (operand
)) / BITS_PER_UNIT
;
1437 /* Adjust so we can use two SImode in DImode.
1438 Calling adj_offsettable_operand will make sure it is an
1439 offsettable address. Don't do this for a postincrement
1440 though; it should remain as it was. */
1441 if (GET_CODE (XEXP (adj_mem
, 0)) != POST_INC
)
1443 = adjust_address (adj_mem
, GET_MODE (adj_mem
), size
/ 2);
1445 output_address (XEXP (adj_mem
, 0));
1450 LOSE_AND_RETURN ("invalid operand for 'H' modifier", x
);
1454 /* Strip the MEM expression. */
1455 operand
= XEXP (operand
, 0);
1459 /* Print 's' if operand is SIGN_EXTEND or 'u' if ZERO_EXTEND unless
1460 cris_output_insn_is_bound is nonzero. */
1461 if (GET_CODE (operand
) != SIGN_EXTEND
1462 && GET_CODE (operand
) != ZERO_EXTEND
1463 && GET_CODE (operand
) != CONST_INT
)
1464 LOSE_AND_RETURN ("invalid operand for 'e' modifier", x
);
1466 if (cris_output_insn_is_bound
)
1468 cris_output_insn_is_bound
= 0;
1472 putc (GET_CODE (operand
) == SIGN_EXTEND
1473 || (GET_CODE (operand
) == CONST_INT
&& INTVAL (operand
) < 0)
1478 /* Print the size letter of the inner element. We can do it by
1479 calling ourselves with the 's' modifier. */
1480 if (GET_CODE (operand
) != SIGN_EXTEND
&& GET_CODE (operand
) != ZERO_EXTEND
)
1481 LOSE_AND_RETURN ("invalid operand for 'm' modifier", x
);
1482 cris_print_operand (file
, XEXP (operand
, 0), 's');
1486 /* Print the least significant part of operand. */
1487 if (GET_CODE (operand
) == CONST_DOUBLE
)
1489 fprintf (file
, HOST_WIDE_INT_PRINT_HEX
, CONST_DOUBLE_LOW (x
));
1492 else if (HOST_BITS_PER_WIDE_INT
> 32 && GET_CODE (operand
) == CONST_INT
)
1494 fprintf (file
, HOST_WIDE_INT_PRINT_HEX
,
1495 INTVAL (x
) & ((unsigned int) 0x7fffffff * 2 + 1));
1498 /* Otherwise the least significant part equals the normal part,
1499 so handle it normally. */
1503 /* When emitting an add for the high part of a DImode constant, we
1504 want to use addq for 0 and adds.w for -1. */
1505 if (GET_CODE (operand
) != CONST_INT
)
1506 LOSE_AND_RETURN ("invalid operand for 'A' modifier", x
);
1507 fprintf (file
, INTVAL (operand
) < 0 ? "adds.w" : "addq");
1511 /* When emitting an sub for the high part of a DImode constant, we
1512 want to use subq for 0 and subs.w for -1. */
1513 if (GET_CODE (operand
) != CONST_INT
)
1514 LOSE_AND_RETURN ("invalid operand for 'D' modifier", x
);
1515 fprintf (file
, INTVAL (operand
) < 0 ? "subs.w" : "subq");
1519 /* Print the operand as the index-part of an address.
1520 Easiest way out is to use cris_print_index. */
1521 cris_print_index (operand
, file
);
1525 /* Print the size letter for an operand to a MULT, which must be a
1526 const_int with a suitable value. */
1527 if (GET_CODE (operand
) != CONST_INT
|| INTVAL (operand
) > 4)
1528 LOSE_AND_RETURN ("invalid operand for 'T' modifier", x
);
1529 fprintf (file
, "%s", mults
[INTVAL (operand
)]);
1533 /* No code, print as usual. */
1537 LOSE_AND_RETURN ("invalid operand modifier letter", x
);
1540 /* Print an operand as without a modifier letter. */
1541 switch (GET_CODE (operand
))
1544 if (REGNO (operand
) > 15)
1545 internal_error ("internal error: bad register: %d", REGNO (operand
));
1546 fprintf (file
, "$%s", reg_names
[REGNO (operand
)]);
1550 output_address (XEXP (operand
, 0));
1554 if (GET_MODE (operand
) == VOIDmode
)
1555 /* A long long constant. */
1556 output_addr_const (file
, operand
);
1559 /* Only single precision is allowed as plain operands the
1560 moment. FIXME: REAL_VALUE_FROM_CONST_DOUBLE isn't
1565 /* FIXME: Perhaps check overflow of the "single". */
1566 REAL_VALUE_FROM_CONST_DOUBLE (r
, operand
);
1567 REAL_VALUE_TO_TARGET_SINGLE (r
, l
);
1569 fprintf (file
, "0x%lx", l
);
1574 ASSERT_PLT_UNSPEC (operand
);
1578 cris_output_addr_const (file
, operand
);
1584 /* For a (MULT (reg X) const_int) we output "rX.S". */
1585 int i
= GET_CODE (XEXP (operand
, 1)) == CONST_INT
1586 ? INTVAL (XEXP (operand
, 1)) : INTVAL (XEXP (operand
, 0));
1587 rtx reg
= GET_CODE (XEXP (operand
, 1)) == CONST_INT
1588 ? XEXP (operand
, 0) : XEXP (operand
, 1);
1590 if (GET_CODE (reg
) != REG
1591 || (GET_CODE (XEXP (operand
, 0)) != CONST_INT
1592 && GET_CODE (XEXP (operand
, 1)) != CONST_INT
))
1593 LOSE_AND_RETURN ("unexpected multiplicative operand", x
);
1595 cris_print_base (reg
, file
);
1596 fprintf (file
, ".%c",
1597 i
== 0 || (i
== 1 && GET_CODE (operand
) == MULT
) ? 'b'
1599 : (i
== 2 && GET_CODE (operand
) == MULT
) || i
== 1 ? 'w'
1605 /* No need to handle all strange variants, let output_addr_const
1607 if (CONSTANT_P (operand
))
1609 cris_output_addr_const (file
, operand
);
1613 LOSE_AND_RETURN ("unexpected operand", x
);
1617 /* The PRINT_OPERAND_ADDRESS worker. */
1620 cris_print_operand_address (file
, x
)
1624 /* All these were inside MEM:s so output indirection characters. */
1627 if (CONSTANT_ADDRESS_P (x
))
1628 cris_output_addr_const (file
, x
);
1629 else if (BASE_OR_AUTOINCR_P (x
))
1630 cris_print_base (x
, file
);
1631 else if (GET_CODE (x
) == PLUS
)
1639 cris_print_base (x1
, file
);
1640 cris_print_index (x2
, file
);
1642 else if (BASE_P (x2
))
1644 cris_print_base (x2
, file
);
1645 cris_print_index (x1
, file
);
1648 LOSE_AND_RETURN ("unrecognized address", x
);
1650 else if (GET_CODE (x
) == MEM
)
1652 /* A DIP. Output more indirection characters. */
1654 cris_print_base (XEXP (x
, 0), file
);
1658 LOSE_AND_RETURN ("unrecognized address", x
);
1663 /* The RETURN_ADDR_RTX worker.
1664 We mark that the return address is used, either by EH or
1665 __builtin_return_address, for use by the function prologue and
1666 epilogue. FIXME: This isn't optimal; we just use the mark in the
1667 prologue and epilogue to say that the return address is to be stored
1668 in the stack frame. We could return SRP for leaf-functions and use the
1669 initial-value machinery. */
1672 cris_return_addr_rtx (count
, frameaddr
)
1674 rtx frameaddr ATTRIBUTE_UNUSED
;
1676 cfun
->machine
->needs_return_address_on_stack
= 1;
1678 /* The return-address is stored just above the saved frame-pointer (if
1679 present). Apparently we can't eliminate from the frame-pointer in
1680 that direction, so use the incoming args (maybe pretended) pointer. */
1682 ? gen_rtx_MEM (Pmode
, plus_constant (virtual_incoming_args_rtx
, -4))
1686 /* This used to be the INITIAL_FRAME_POINTER_OFFSET worker; now only
1687 handles FP -> SP elimination offset. */
1690 cris_initial_frame_pointer_offset ()
1694 /* Initial offset is 0 if we don't have a frame pointer. */
1697 /* And 4 for each register pushed. */
1698 for (regno
= 0; regno
< FIRST_PSEUDO_REGISTER
; regno
++)
1699 if ((((regs_ever_live
[regno
]
1700 && !call_used_regs
[regno
])
1701 || (regno
== (int) PIC_OFFSET_TABLE_REGNUM
1702 && (current_function_uses_pic_offset_table
1703 /* It is saved anyway, if there would be a gap. */
1705 && regs_ever_live
[regno
+ 1]
1706 && !call_used_regs
[regno
+ 1]))))
1707 && (regno
!= FRAME_POINTER_REGNUM
|| !frame_pointer_needed
)
1708 && regno
!= CRIS_SRP_REGNUM
)
1709 || (current_function_calls_eh_return
1710 && (regno
== EH_RETURN_DATA_REGNO (0)
1711 || regno
== EH_RETURN_DATA_REGNO (1)
1712 || regno
== EH_RETURN_DATA_REGNO (2)
1713 || regno
== EH_RETURN_DATA_REGNO (3))))
1716 /* And then, last, we add the locals allocated. */
1717 offs
+= get_frame_size ();
1719 /* And more; the accumulated args size. */
1720 offs
+= current_function_outgoing_args_size
;
1722 /* Then round it off, in case we use aligned stack. */
1723 if (TARGET_STACK_ALIGN
)
1724 offs
= TARGET_ALIGN_BY_32
? (offs
+ 3) & ~3 : (offs
+ 1) & ~1;
1729 /* The INITIAL_ELIMINATION_OFFSET worker.
1730 Calculate the difference between imaginary registers such as frame
1731 pointer and the stack pointer. Used to eliminate the frame pointer
1732 and imaginary arg pointer. */
1735 cris_initial_elimination_offset (fromreg
, toreg
)
1740 = cris_initial_frame_pointer_offset ();
1742 /* We should be able to use regs_ever_live and related prologue
1743 information here, or alpha should not as well. */
1744 int return_address_on_stack
1745 = regs_ever_live
[CRIS_SRP_REGNUM
]
1746 || cfun
->machine
->needs_return_address_on_stack
!= 0;
1748 /* Here we act as if the frame-pointer is needed. */
1749 int ap_fp_offset
= 4 + (return_address_on_stack
? 4 : 0);
1751 if (fromreg
== ARG_POINTER_REGNUM
1752 && toreg
== FRAME_POINTER_REGNUM
)
1753 return ap_fp_offset
;
1755 /* Between the frame pointer and the stack are only "normal" stack
1756 variables and saved registers. */
1757 if (fromreg
== FRAME_POINTER_REGNUM
1758 && toreg
== STACK_POINTER_REGNUM
)
1759 return fp_sp_offset
;
1761 /* We need to balance out the frame pointer here. */
1762 if (fromreg
== ARG_POINTER_REGNUM
1763 && toreg
== STACK_POINTER_REGNUM
)
1764 return ap_fp_offset
+ fp_sp_offset
- 4;
1769 /* This function looks into the pattern to see how this insn affects
1772 Used when to eliminate test insns before a condition-code user,
1773 such as a "scc" insn or a conditional branch. This includes
1774 checking if the entities that cc was updated by, are changed by the
1777 Currently a jumble of the old peek-inside-the-insn and the newer
1778 check-cc-attribute methods. */
1781 cris_notice_update_cc (exp
, insn
)
1785 /* Check if user specified "-mcc-init" as a bug-workaround. FIXME:
1786 TARGET_CCINIT does not work; we must set CC_REVERSED as below.
1787 Several test-cases will otherwise fail, for example
1788 gcc.c-torture/execute/20000217-1.c -O0 and -O1. */
1795 /* Slowly, we're converting to using attributes to control the setting
1796 of condition-code status. */
1797 switch (get_attr_cc (insn
))
1800 /* Even if it is "none", a setting may clobber a previous
1801 cc-value, so check. */
1802 if (GET_CODE (exp
) == SET
)
1804 if (cc_status
.value1
1805 && cris_reg_overlap_mentioned_p (SET_DEST (exp
),
1807 cc_status
.value1
= 0;
1809 if (cc_status
.value2
1810 && cris_reg_overlap_mentioned_p (SET_DEST (exp
),
1812 cc_status
.value2
= 0;
1821 /* Which means, for:
1826 CC is (reg) and (...) - unless (...) is 0, then CC does not change.
1827 CC_NO_OVERFLOW unless (...) is reg or mem.
1836 (set (reg1) (mem (bdap/biap)))
1837 (set (reg2) (bdap/biap))):
1838 CC is (reg1) and (mem (reg2))
1841 (set (mem (bdap/biap)) (reg1)) [or 0]
1842 (set (reg2) (bdap/biap))):
1845 (where reg and mem includes strict_low_parts variants thereof)
1847 For all others, assume CC is clobbered.
1848 Note that we do not have to care about setting CC_NO_OVERFLOW,
1849 since the overflow flag is set to 0 (i.e. right) for
1850 instructions where it does not have any sane sense, but where
1851 other flags have meanings. (This includes shifts; the carry is
1854 Note that there are other parallel constructs we could match,
1855 but we don't do that yet. */
1857 if (GET_CODE (exp
) == SET
)
1859 /* FIXME: Check when this happens. It looks like we should
1860 actually do a CC_STATUS_INIT here to be safe. */
1861 if (SET_DEST (exp
) == pc_rtx
)
1864 /* Record CC0 changes, so we do not have to output multiple
1866 if (SET_DEST (exp
) == cc0_rtx
)
1868 cc_status
.value1
= SET_SRC (exp
);
1869 cc_status
.value2
= 0;
1871 /* Handle flags for the special btstq on one bit. */
1872 if (GET_CODE (SET_SRC (exp
)) == ZERO_EXTRACT
1873 && XEXP (SET_SRC (exp
), 1) == const1_rtx
)
1875 if (GET_CODE (XEXP (SET_SRC (exp
), 0)) == CONST_INT
)
1877 cc_status
.flags
= CC_INVERTED
;
1879 /* A one-bit btstq. */
1880 cc_status
.flags
= CC_Z_IN_NOT_N
;
1883 cc_status
.flags
= 0;
1885 if (GET_CODE (SET_SRC (exp
)) == COMPARE
)
1887 if (!REG_P (XEXP (SET_SRC (exp
), 0))
1888 && XEXP (SET_SRC (exp
), 1) != const0_rtx
)
1889 /* For some reason gcc will not canonicalize compare
1890 operations, reversing the sign by itself if
1891 operands are in wrong order. */
1892 /* (But NOT inverted; eq is still eq.) */
1893 cc_status
.flags
= CC_REVERSED
;
1895 /* This seems to be overlooked by gcc. FIXME: Check again.
1896 FIXME: Is it really safe? */
1898 = gen_rtx_MINUS (GET_MODE (SET_SRC (exp
)),
1899 XEXP (SET_SRC (exp
), 0),
1900 XEXP (SET_SRC (exp
), 1));
1904 else if (REG_P (SET_DEST (exp
))
1905 || (GET_CODE (SET_DEST (exp
)) == STRICT_LOW_PART
1906 && REG_P (XEXP (SET_DEST (exp
), 0))))
1908 /* A register is set; normally CC is set to show that no
1909 test insn is needed. Catch the exceptions. */
1911 /* If not to cc0, then no "set"s in non-natural mode give
1913 if (GET_MODE_SIZE (GET_MODE (SET_DEST (exp
))) > UNITS_PER_WORD
1914 || GET_MODE_CLASS (GET_MODE (SET_DEST (exp
))) == MODE_FLOAT
)
1916 /* ... except add:s and sub:s in DImode. */
1917 if (GET_MODE (SET_DEST (exp
)) == DImode
1918 && (GET_CODE (SET_SRC (exp
)) == PLUS
1919 || GET_CODE (SET_SRC (exp
)) == MINUS
))
1921 cc_status
.flags
= 0;
1922 cc_status
.value1
= SET_DEST (exp
);
1923 cc_status
.value2
= SET_SRC (exp
);
1925 if (cris_reg_overlap_mentioned_p (cc_status
.value1
,
1927 cc_status
.value2
= 0;
1929 /* Add and sub may set V, which gets us
1930 unoptimizable results in "gt" and "le" condition
1932 cc_status
.flags
|= CC_NO_OVERFLOW
;
1937 else if (SET_SRC (exp
) == const0_rtx
)
1939 /* There's no CC0 change when clearing a register or
1940 memory. Just check for overlap. */
1941 if ((cc_status
.value1
1942 && cris_reg_overlap_mentioned_p (SET_DEST (exp
),
1944 cc_status
.value1
= 0;
1946 if ((cc_status
.value2
1947 && cris_reg_overlap_mentioned_p (SET_DEST (exp
),
1949 cc_status
.value2
= 0;
1955 cc_status
.flags
= 0;
1956 cc_status
.value1
= SET_DEST (exp
);
1957 cc_status
.value2
= SET_SRC (exp
);
1959 if (cris_reg_overlap_mentioned_p (cc_status
.value1
,
1961 cc_status
.value2
= 0;
1963 /* Some operations may set V, which gets us
1964 unoptimizable results in "gt" and "le" condition
1966 if (GET_CODE (SET_SRC (exp
)) == PLUS
1967 || GET_CODE (SET_SRC (exp
)) == MINUS
1968 || GET_CODE (SET_SRC (exp
)) == NEG
)
1969 cc_status
.flags
|= CC_NO_OVERFLOW
;
1974 else if (GET_CODE (SET_DEST (exp
)) == MEM
1975 || (GET_CODE (SET_DEST (exp
)) == STRICT_LOW_PART
1976 && GET_CODE (XEXP (SET_DEST (exp
), 0)) == MEM
))
1978 /* When SET to MEM, then CC is not changed (except for
1980 if ((cc_status
.value1
1981 && cris_reg_overlap_mentioned_p (SET_DEST (exp
),
1983 cc_status
.value1
= 0;
1985 if ((cc_status
.value2
1986 && cris_reg_overlap_mentioned_p (SET_DEST (exp
),
1988 cc_status
.value2
= 0;
1993 else if (GET_CODE (exp
) == PARALLEL
)
1995 if (GET_CODE (XVECEXP (exp
, 0, 0)) == SET
1996 && GET_CODE (XVECEXP (exp
, 0, 1)) == SET
1997 && REG_P (XEXP (XVECEXP (exp
, 0, 1), 0)))
1999 if (REG_P (XEXP (XVECEXP (exp
, 0, 0), 0))
2000 && GET_CODE (XEXP (XVECEXP (exp
, 0, 0), 1)) == MEM
)
2002 /* For "move.S [rx=ry+o],rz", say CC reflects
2003 value1=rz and value2=[rx] */
2004 cc_status
.value1
= XEXP (XVECEXP (exp
, 0, 0), 0);
2006 = gen_rtx_MEM (GET_MODE (XEXP (XVECEXP (exp
, 0, 0), 0)),
2007 XEXP (XVECEXP (exp
, 0, 1), 0));
2008 cc_status
.flags
= 0;
2010 /* Huh? A side-effect cannot change the destination
2012 if (cris_reg_overlap_mentioned_p (cc_status
.value1
,
2014 internal_error ("internal error: sideeffect-insn affecting main effect");
2017 else if ((REG_P (XEXP (XVECEXP (exp
, 0, 0), 1))
2018 || XEXP (XVECEXP (exp
, 0, 0), 1) == const0_rtx
)
2019 && GET_CODE (XEXP (XVECEXP (exp
, 0, 0), 0)) == MEM
)
2021 /* For "move.S rz,[rx=ry+o]" and "clear.S [rx=ry+o]",
2022 say flags are not changed, except for overlap. */
2023 if (cc_status
.value1
2024 && cris_reg_overlap_mentioned_p (XEXP
2028 cc_status
.value1
= 0;
2030 if (cc_status
.value1
2031 && cris_reg_overlap_mentioned_p (XEXP
2035 cc_status
.value1
= 0;
2037 if (cc_status
.value2
2038 && cris_reg_overlap_mentioned_p (XEXP
2042 cc_status
.value2
= 0;
2044 if (cc_status
.value2
2045 && cris_reg_overlap_mentioned_p (XEXP
2049 cc_status
.value2
= 0;
2058 /* Unknown cc_attr value. */
2065 /* Return != 0 if the return sequence for the current function is short,
2066 like "ret" or "jump [sp+]". Prior to reloading, we can't tell how
2067 many registers must be saved, so return 0 then. */
2070 cris_simple_epilogue ()
2073 int reglimit
= STACK_POINTER_REGNUM
;
2076 if (! reload_completed
2077 || frame_pointer_needed
2078 || get_frame_size () != 0
2079 || current_function_pretend_args_size
2080 || current_function_args_size
2081 || current_function_outgoing_args_size
2082 || current_function_calls_eh_return
2084 /* If we're not supposed to emit prologue and epilogue, we must
2085 not emit return-type instructions. */
2086 || !TARGET_PROLOGUE_EPILOGUE
)
2089 /* We allow a "movem [sp+],rN" to sit in front if the "jump [sp+]" or
2090 in the delay-slot of the "ret". */
2091 for (regno
= 0; regno
< reglimit
; regno
++)
2092 if ((regs_ever_live
[regno
] && ! call_used_regs
[regno
])
2093 || (regno
== (int) PIC_OFFSET_TABLE_REGNUM
2094 && (current_function_uses_pic_offset_table
2095 /* It is saved anyway, if there would be a gap. */
2097 && regs_ever_live
[regno
+ 1]
2098 && !call_used_regs
[regno
+ 1]))))
2100 if (lastreg
!= regno
- 1)
2108 /* Compute a (partial) cost for rtx X. Return true if the complete
2109 cost has been computed, and false if subexpressions should be
2110 scanned. In either case, *TOTAL contains the cost result. */
2113 cris_rtx_costs (x
, code
, outer_code
, total
)
2115 int code
, outer_code
;
2122 HOST_WIDE_INT val
= INTVAL (x
);
2125 else if (val
< 32 && val
>= -32)
2127 /* Eight or 16 bits are a word and cycle more expensive. */
2128 else if (val
<= 32767 && val
>= -32768)
2130 /* A 32 bit constant (or very seldom, unsigned 16 bits) costs
2131 another word. FIXME: This isn't linear to 16 bits. */
2143 /* For PIC, we need a prefix (if it isn't already there),
2144 and the PIC register. For a global PIC symbol, we also
2145 need a read of the GOT. */
2148 if (cris_got_symbol (x
))
2158 if (x
!= CONST0_RTX (GET_MODE (x
) == VOIDmode
? DImode
: GET_MODE (x
)))
2161 /* Make 0.0 cheap, else test-insns will not be used. */
2166 /* Identify values that are no powers of two. Powers of 2 are
2167 taken care of already and those values should not be changed. */
2168 if (GET_CODE (XEXP (x
, 1)) != CONST_INT
2169 || exact_log2 (INTVAL (XEXP (x
, 1)) < 0))
2171 /* If we have a multiply insn, then the cost is between
2172 1 and 2 "fast" instructions. */
2173 if (TARGET_HAS_MUL_INSNS
)
2175 *total
= COSTS_N_INSNS (1) + COSTS_N_INSNS (1) / 2;
2179 /* Estimate as 4 + 4 * #ofbits. */
2180 *total
= COSTS_N_INSNS (132);
2189 if (GET_CODE (XEXP (x
, 1)) != CONST_INT
2190 || exact_log2 (INTVAL (XEXP (x
, 1)) < 0))
2192 /* Estimate this as 4 + 8 * #of bits. */
2193 *total
= COSTS_N_INSNS (260);
2199 if (GET_CODE (XEXP (x
, 1)) == CONST_INT
2200 /* Two constants may actually happen before optimization. */
2201 && GET_CODE (XEXP (x
, 0)) != CONST_INT
2202 && !CONST_OK_FOR_LETTER_P (INTVAL (XEXP (x
, 1)), 'I'))
2204 *total
= (rtx_cost (XEXP (x
, 0), outer_code
) + 2
2205 + 2 * GET_MODE_NUNITS (GET_MODE (XEXP (x
, 0))));
2210 case ZERO_EXTEND
: case SIGN_EXTEND
:
2211 *total
= rtx_cost (XEXP (x
, 0), outer_code
);
2219 /* The ADDRESS_COST worker. */
2222 cris_address_cost (x
)
2225 /* The metric to use for the cost-macros is unclear.
2226 The metric used here is (the number of cycles needed) / 2,
2227 where we consider equal a cycle for a word of code and a cycle to
2230 /* The cheapest addressing modes get 0, since nothing extra is needed. */
2231 if (BASE_OR_AUTOINCR_P (x
))
2234 /* An indirect mem must be a DIP. This means two bytes extra for code,
2235 and 4 bytes extra for memory read, i.e. (2 + 4) / 2. */
2236 if (GET_CODE (x
) == MEM
)
2239 /* Assume (2 + 4) / 2 for a single constant; a dword, since it needs
2240 an extra DIP prefix and 4 bytes of constant in most cases.
2241 For PIC and a symbol with a GOT entry, we double the cost since we
2242 add a [rPIC+...] offset. A GOT-less symbol uses a BDAP prefix
2243 equivalent to the DIP prefix for non-PIC, hence the same cost. */
2245 return flag_pic
&& cris_got_symbol (x
) ? 2 * (2 + 4) / 2 : (2 + 4) / 2;
2247 /* Handle BIAP and BDAP prefixes. */
2248 if (GET_CODE (x
) == PLUS
)
2250 rtx tem1
= XEXP (x
, 0);
2251 rtx tem2
= XEXP (x
, 1);
2253 /* A BIAP is 2 extra bytes for the prefix insn, nothing more. We
2254 recognize the typical MULT which is always in tem1 because of
2255 insn canonicalization. */
2256 if ((GET_CODE (tem1
) == MULT
&& BIAP_INDEX_P (tem1
))
2260 /* A BDAP (quick) is 2 extra bytes. Any constant operand to the
2261 PLUS is always found in tem2. */
2262 if (GET_CODE (tem2
) == CONST_INT
2263 && INTVAL (tem2
) < 128 && INTVAL (tem2
) >= -128)
2266 /* A BDAP -32768 .. 32767 is like BDAP quick, but with 2 extra
2268 if (GET_CODE (tem2
) == CONST_INT
2269 && CONST_OK_FOR_LETTER_P (INTVAL (tem2
), 'L'))
2272 /* A BDAP with some other constant is 2 bytes extra. */
2273 if (CONSTANT_P (tem2
))
2274 return (2 + 2 + 2) / 2;
2276 /* BDAP with something indirect should have a higher cost than
2277 BIAP with register. FIXME: Should it cost like a MEM or more? */
2278 /* Don't need to check it, it's the only one left.
2279 FIXME: There was a REG test missing, perhaps there are others.
2281 return (2 + 2 + 2) / 2;
2284 /* What else? Return a high cost. It matters only for valid
2285 addressing modes. */
2289 /* Check various objections to the side-effect. Used in the test-part
2290 of an anonymous insn describing an insn with a possible side-effect.
2291 Returns nonzero if the implied side-effect is ok.
2294 ops : An array of rtx:es. lreg, rreg, rval,
2295 The variables multop and other_op are indexes into this,
2296 or -1 if they are not applicable.
2297 lreg : The register that gets assigned in the side-effect.
2298 rreg : One register in the side-effect expression
2299 rval : The other register, or an int.
2300 multop : An integer to multiply rval with.
2301 other_op : One of the entities of the main effect,
2302 whose mode we must consider. */
2305 cris_side_effect_mode_ok (code
, ops
, lreg
, rreg
, rval
, multop
, other_op
)
2308 int lreg
, rreg
, rval
, multop
, other_op
;
2310 /* Find what value to multiply with, for rx =ry + rz * n. */
2311 int mult
= multop
< 0 ? 1 : INTVAL (ops
[multop
]);
2313 rtx reg_rtx
= ops
[rreg
];
2314 rtx val_rtx
= ops
[rval
];
2316 /* The operands may be swapped. Canonicalize them in reg_rtx and
2317 val_rtx, where reg_rtx always is a reg (for this constraint to
2319 if (! BASE_P (reg_rtx
))
2320 reg_rtx
= val_rtx
, val_rtx
= ops
[rreg
];
2322 /* Don't forget to check that reg_rtx really is a reg. If it isn't,
2323 we have no business. */
2324 if (! BASE_P (reg_rtx
))
2327 /* Don't do this when -mno-split. */
2328 if (!TARGET_SIDE_EFFECT_PREFIXES
)
2331 /* The mult expression may be hidden in lreg. FIXME: Add more
2332 commentary about that. */
2333 if (GET_CODE (val_rtx
) == MULT
)
2335 mult
= INTVAL (XEXP (val_rtx
, 1));
2336 val_rtx
= XEXP (val_rtx
, 0);
2340 /* First check the "other operand". */
2343 if (GET_MODE_SIZE (GET_MODE (ops
[other_op
])) > UNITS_PER_WORD
)
2346 /* Check if the lvalue register is the same as the "other
2347 operand". If so, the result is undefined and we shouldn't do
2348 this. FIXME: Check again. */
2349 if ((BASE_P (ops
[lreg
])
2350 && BASE_P (ops
[other_op
])
2351 && REGNO (ops
[lreg
]) == REGNO (ops
[other_op
]))
2352 || rtx_equal_p (ops
[other_op
], ops
[lreg
]))
2356 /* Do not accept frame_pointer_rtx as any operand. */
2357 if (ops
[lreg
] == frame_pointer_rtx
|| ops
[rreg
] == frame_pointer_rtx
2358 || ops
[rval
] == frame_pointer_rtx
2359 || (other_op
>= 0 && ops
[other_op
] == frame_pointer_rtx
))
2363 && ! BASE_P (val_rtx
))
2366 /* Do not allow rx = rx + n if a normal add or sub with same size
2368 if (rtx_equal_p (ops
[lreg
], reg_rtx
)
2369 && GET_CODE (val_rtx
) == CONST_INT
2370 && (INTVAL (val_rtx
) <= 63 && INTVAL (val_rtx
) >= -63))
2373 /* Check allowed cases, like [r(+)?].[bwd] and const.
2374 A symbol is not allowed with PIC. */
2375 if (CONSTANT_P (val_rtx
))
2376 return flag_pic
== 0 || cris_symbol (val_rtx
) == 0;
2378 if (GET_CODE (val_rtx
) == MEM
2379 && BASE_OR_AUTOINCR_P (XEXP (val_rtx
, 0)))
2382 if (GET_CODE (val_rtx
) == SIGN_EXTEND
2383 && GET_CODE (XEXP (val_rtx
, 0)) == MEM
2384 && BASE_OR_AUTOINCR_P (XEXP (XEXP (val_rtx
, 0), 0)))
2387 /* If we got here, it's not a valid addressing mode. */
2390 else if (code
== MULT
2391 || (code
== PLUS
&& BASE_P (val_rtx
)))
2393 /* Do not allow rx = rx + ry.S, since it doesn't give better code. */
2394 if (rtx_equal_p (ops
[lreg
], reg_rtx
)
2395 || (mult
== 1 && rtx_equal_p (ops
[lreg
], val_rtx
)))
2398 /* Do not allow bad multiply-values. */
2399 if (mult
!= 1 && mult
!= 2 && mult
!= 4)
2402 /* Only allow r + ... */
2403 if (! BASE_P (reg_rtx
))
2406 /* If we got here, all seems ok.
2407 (All checks need to be done above). */
2411 /* If we get here, the caller got its initial tests wrong. */
2412 internal_error ("internal error: cris_side_effect_mode_ok with bad operands");
2415 /* The function reg_overlap_mentioned_p in CVS (still as of 2001-05-16)
2416 does not handle the case where the IN operand is strict_low_part; it
2417 does handle it for X. Test-case in Axis-20010516. This function takes
2418 care of that for THIS port. FIXME: strict_low_part is going away
2422 cris_reg_overlap_mentioned_p (x
, in
)
2425 /* The function reg_overlap_mentioned now handles when X is
2426 strict_low_part, but not when IN is a STRICT_LOW_PART. */
2427 if (GET_CODE (in
) == STRICT_LOW_PART
)
2430 return reg_overlap_mentioned_p (x
, in
);
2433 /* The TARGET_ASM_NAMED_SECTION worker.
2434 We just dispatch to the functions for ELF and a.out. */
2437 cris_target_asm_named_section (name
, flags
)
2442 default_no_named_section (name
, flags
);
2444 default_elf_asm_named_section (name
, flags
);
2447 /* The LEGITIMATE_PIC_OPERAND_P worker. */
2450 cris_legitimate_pic_operand (x
)
2453 /* The PIC representation of a symbol with a GOT entry will be (for
2454 example; relocations differ):
2455 sym => [rPIC+sym:GOT]
2456 and for a GOT-less symbol it will be (for example, relocation differ):
2457 sym => rPIC+sym:GOTOFF
2458 so only a symbol with a GOT is by itself a valid operand, and it
2459 can't be a sum of a symbol and an offset. */
2460 return ! cris_symbol (x
) || cris_got_symbol (x
);
2463 /* Return nonzero if there's a SYMBOL_REF or LABEL_REF hiding inside this
2470 switch (GET_CODE (x
))
2477 /* A PLT reference. */
2478 ASSERT_PLT_UNSPEC (x
);
2482 return cris_symbol (XEXP (x
, 0));
2486 return cris_symbol (XEXP (x
, 0)) || cris_symbol (XEXP (x
, 1));
2490 case CONSTANT_P_RTX
:
2494 fatal_insn ("unrecognized supposed constant", x
);
2500 /* Return nonzero if there's a SYMBOL_REF or LABEL_REF hiding inside this
2501 CONSTANT_P, and the symbol does not need a GOT entry. Also set
2502 current_function_uses_pic_offset_table if we're generating PIC and ever
2503 see something that would need one. */
2506 cris_gotless_symbol (x
)
2509 #ifdef ENABLE_CHECKING
2514 switch (GET_CODE (x
))
2517 ASSERT_PLT_UNSPEC (x
);
2522 current_function_uses_pic_offset_table
= 1;
2523 return SYMBOL_REF_LOCAL_P (x
);
2526 /* We don't set current_function_uses_pic_offset_table for
2527 LABEL_REF:s in here, since they are almost always originating
2528 from some branch. The only time it does not come from a label is
2529 when GCC does something like __builtin_setjmp. Then we get the
2530 LABEL_REF from the movsi expander, so we mark it there as a
2535 return cris_gotless_symbol (XEXP (x
, 0));
2540 int x0
= cris_gotless_symbol (XEXP (x
, 0)) != 0;
2541 int x1
= cris_gotless_symbol (XEXP (x
, 1)) != 0;
2543 /* One and only one of them must be a local symbol. Neither must
2544 be some other, more general kind of symbol. */
2547 && ! (x0
== 0 && cris_symbol (XEXP (x
, 0)))
2548 && ! (x1
== 0 && cris_symbol (XEXP (x
, 1)));
2553 case CONSTANT_P_RTX
:
2557 fatal_insn ("unrecognized supposed constant", x
);
2563 /* Return nonzero if there's a SYMBOL_REF or LABEL_REF hiding inside this
2564 CONSTANT_P, and the symbol needs a GOT entry. */
2570 #ifdef ENABLE_CHECKING
2575 switch (GET_CODE (x
))
2578 ASSERT_PLT_UNSPEC (x
);
2583 current_function_uses_pic_offset_table
= 1;
2584 return ! SYMBOL_REF_LOCAL_P (x
);
2587 return cris_got_symbol (XEXP (x
, 0));
2590 /* A LABEL_REF is never visible as a symbol outside the local
2594 /* Nope, can't access the GOT for "symbol + offset". */
2599 case CONSTANT_P_RTX
:
2603 fatal_insn ("unrecognized supposed constant in cris_global_pic_symbol",
2610 /* The OVERRIDE_OPTIONS worker.
2611 As is the norm, this also parses -mfoo=bar type parameters. */
2614 cris_override_options ()
2616 if (cris_max_stackframe_str
)
2618 cris_max_stackframe
= atoi (cris_max_stackframe_str
);
2620 /* Do some sanity checking. */
2621 if (cris_max_stackframe
< 0 || cris_max_stackframe
> 0x20000000)
2622 internal_error ("-max-stackframe=%d is not usable, not between 0 and %d",
2623 cris_max_stackframe
, 0x20000000);
2626 /* Let "-metrax4" and "-metrax100" change the cpu version. */
2627 if (TARGET_SVINTO
&& cris_cpu_version
< CRIS_CPU_SVINTO
)
2628 cris_cpu_version
= CRIS_CPU_SVINTO
;
2629 else if (TARGET_ETRAX4_ADD
&& cris_cpu_version
< CRIS_CPU_ETRAX4
)
2630 cris_cpu_version
= CRIS_CPU_ETRAX4
;
2632 /* Parse -march=... and its synonym, the deprecated -mcpu=... */
2636 = (*cris_cpu_str
== 'v' ? atoi (cris_cpu_str
+ 1) : -1);
2638 if (strcmp ("etrax4", cris_cpu_str
) == 0)
2639 cris_cpu_version
= 3;
2641 if (strcmp ("svinto", cris_cpu_str
) == 0
2642 || strcmp ("etrax100", cris_cpu_str
) == 0)
2643 cris_cpu_version
= 8;
2645 if (strcmp ("ng", cris_cpu_str
) == 0
2646 || strcmp ("etrax100lx", cris_cpu_str
) == 0)
2647 cris_cpu_version
= 10;
2649 if (cris_cpu_version
< 0 || cris_cpu_version
> 10)
2650 error ("unknown CRIS version specification in -march= or -mcpu= : %s",
2653 /* Set the target flags. */
2654 if (cris_cpu_version
>= CRIS_CPU_ETRAX4
)
2655 target_flags
|= TARGET_MASK_ETRAX4_ADD
;
2657 /* If this is Svinto or higher, align for 32 bit accesses. */
2658 if (cris_cpu_version
>= CRIS_CPU_SVINTO
)
2660 |= (TARGET_MASK_SVINTO
| TARGET_MASK_ALIGN_BY_32
2661 | TARGET_MASK_STACK_ALIGN
| TARGET_MASK_CONST_ALIGN
2662 | TARGET_MASK_DATA_ALIGN
);
2664 /* Note that we do not add new flags when it can be completely
2665 described with a macro that uses -mcpu=X. So
2666 TARGET_HAS_MUL_INSNS is (cris_cpu_version >= CRIS_CPU_NG). */
2672 = (*cris_tune_str
== 'v' ? atoi (cris_tune_str
+ 1) : -1);
2674 if (strcmp ("etrax4", cris_tune_str
) == 0)
2677 if (strcmp ("svinto", cris_tune_str
) == 0
2678 || strcmp ("etrax100", cris_tune_str
) == 0)
2681 if (strcmp ("ng", cris_tune_str
) == 0
2682 || strcmp ("etrax100lx", cris_tune_str
) == 0)
2685 if (cris_tune
< 0 || cris_tune
> 10)
2686 error ("unknown CRIS cpu version specification in -mtune= : %s",
2689 if (cris_tune
>= CRIS_CPU_SVINTO
)
2690 /* We have currently nothing more to tune than alignment for
2693 |= (TARGET_MASK_STACK_ALIGN
| TARGET_MASK_CONST_ALIGN
2694 | TARGET_MASK_DATA_ALIGN
| TARGET_MASK_ALIGN_BY_32
);
2699 /* Use error rather than warning, so invalid use is easily
2700 detectable. Still change to the values we expect, to avoid
2704 error ("-fPIC and -fpic are not supported in this configuration");
2708 /* Turn off function CSE. We need to have the addresses reach the
2709 call expanders to get PLT-marked, as they could otherwise be
2710 compared against zero directly or indirectly. After visiting the
2711 call expanders they will then be cse:ed, as the call expanders
2712 force_reg the addresses, effectively forcing flag_no_function_cse
2714 flag_no_function_cse
= 1;
2717 if ((write_symbols
== DWARF_DEBUG
2718 || write_symbols
== DWARF2_DEBUG
) && ! TARGET_ELF
)
2720 warning ("that particular -g option is invalid with -maout and -melinux");
2721 write_symbols
= DBX_DEBUG
;
2724 /* Set the per-function-data initializer. */
2725 init_machine_status
= cris_init_machine_status
;
2728 /* The TARGET_ASM_OUTPUT_MI_THUNK worker. */
2731 cris_asm_output_mi_thunk (stream
, thunkdecl
, delta
, vcall_offset
, funcdecl
)
2733 tree thunkdecl ATTRIBUTE_UNUSED
;
2734 HOST_WIDE_INT delta
;
2735 HOST_WIDE_INT vcall_offset ATTRIBUTE_UNUSED
;
2740 fprintf (stream
, "\tadd%s ", ADDITIVE_SIZE_MODIFIER (delta
));
2741 fprintf (stream
, HOST_WIDE_INT_PRINT_DEC
, delta
);
2742 fprintf (stream
, ",$%s\n", reg_names
[CRIS_FIRST_ARG_REG
]);
2746 fprintf (stream
, "\tsub%s ", ADDITIVE_SIZE_MODIFIER (-delta
));
2747 fprintf (stream
, HOST_WIDE_INT_PRINT_DEC
, -delta
);
2748 fprintf (stream
, ",$%s\n", reg_names
[CRIS_FIRST_ARG_REG
]);
2753 const char *name
= XSTR (XEXP (DECL_RTL (funcdecl
), 0), 0);
2755 name
= (* targetm
.strip_name_encoding
) (name
);
2756 fprintf (stream
, "add.d ");
2757 assemble_name (stream
, name
);
2758 fprintf (stream
, "%s,$pc\n", CRIS_PLT_PCOFFSET_SUFFIX
);
2762 fprintf (stream
, "jump ");
2763 assemble_name (stream
, XSTR (XEXP (DECL_RTL (funcdecl
), 0), 0));
2764 fprintf (stream
, "\n");
2768 /* The EXPAND_BUILTIN_VA_ARG worker. This is modified from the
2769 "standard" implementation of va_arg: read the value from the current
2770 address and increment by the size of one or two registers. The
2771 important difference for CRIS is that if the type is
2772 pass-by-reference, then perform an indirection. */
2775 cris_expand_builtin_va_arg (valist
, type
)
2781 tree passed_size
= size_zero_node
;
2782 tree type_size
= NULL
;
2783 tree size3
= size_int (3);
2784 tree size4
= size_int (4);
2785 tree size8
= size_int (8);
2791 if (type
== error_mark_node
2792 || (type_size
= TYPE_SIZE_UNIT (TYPE_MAIN_VARIANT (type
))) == NULL
2793 || TREE_OVERFLOW (type_size
))
2794 /* Presumably an error; the size isn't computable. A message has
2795 supposedly been emitted elsewhere. */
2796 rounded_size
= size_zero_node
;
2799 = fold (build (MULT_EXPR
, sizetype
,
2800 fold (build (TRUNC_DIV_EXPR
, sizetype
,
2801 fold (build (PLUS_EXPR
, sizetype
,
2806 if (!integer_zerop (rounded_size
))
2808 /* Check if the type is passed by value or by reference. Values up
2809 to 8 bytes are passed by-value, padded to register-size (4
2810 bytes). Larger values and varying-size types are passed
2813 = (!really_constant_p (type_size
)
2815 : fold (build (COND_EXPR
, sizetype
,
2816 fold (build (GT_EXPR
, sizetype
,
2823 = (!really_constant_p (type_size
)
2824 ? build1 (INDIRECT_REF
, build_pointer_type (type
), addr_tree
)
2825 : fold (build (COND_EXPR
, TREE_TYPE (addr_tree
),
2826 fold (build (GT_EXPR
, sizetype
,
2829 build1 (INDIRECT_REF
, build_pointer_type (type
),
2834 addr
= expand_expr (addr_tree
, NULL_RTX
, Pmode
, EXPAND_NORMAL
);
2835 addr
= copy_to_reg (addr
);
2837 if (!integer_zerop (rounded_size
))
2839 /* Compute new value for AP. */
2840 t
= build (MODIFY_EXPR
, TREE_TYPE (valist
), valist
,
2841 build (PLUS_EXPR
, TREE_TYPE (valist
), valist
,
2843 TREE_SIDE_EFFECTS (t
) = 1;
2844 expand_expr (t
, const0_rtx
, VOIDmode
, EXPAND_NORMAL
);
2850 /* The INIT_EXPANDERS worker sets the per-function-data initializer and
2854 cris_init_expanders ()
2856 /* Nothing here at the moment. */
2859 /* Zero initialization is OK for all current fields. */
2861 static struct machine_function
*
2862 cris_init_machine_status ()
2864 return ggc_alloc_cleared (sizeof (struct machine_function
));
2867 /* Split a 2 word move (DI or presumably DF) into component parts.
2868 Originally a copy of gen_split_move_double in m32r.c. */
2871 cris_split_movdx (operands
)
2874 enum machine_mode mode
= GET_MODE (operands
[0]);
2875 rtx dest
= operands
[0];
2876 rtx src
= operands
[1];
2879 /* We used to have to handle (SUBREG (MEM)) here, but that should no
2880 longer happen; after reload there are no SUBREGs any more, and we're
2881 only called after reload. */
2882 if (GET_CODE (dest
) == SUBREG
|| GET_CODE (src
) == SUBREG
)
2886 if (GET_CODE (dest
) == REG
)
2888 int dregno
= REGNO (dest
);
2890 /* Reg-to-reg copy. */
2891 if (GET_CODE (src
) == REG
)
2893 int sregno
= REGNO (src
);
2895 int reverse
= (dregno
== sregno
+ 1);
2897 /* We normally copy the low-numbered register first. However, if
2898 the first register operand 0 is the same as the second register of
2899 operand 1, we must copy in the opposite order. */
2900 emit_insn (gen_rtx_SET (VOIDmode
,
2901 operand_subword (dest
, reverse
, TRUE
, mode
),
2902 operand_subword (src
, reverse
, TRUE
, mode
)));
2904 emit_insn (gen_rtx_SET (VOIDmode
,
2905 operand_subword (dest
, !reverse
, TRUE
, mode
),
2906 operand_subword (src
, !reverse
, TRUE
, mode
)));
2908 /* Constant-to-reg copy. */
2909 else if (GET_CODE (src
) == CONST_INT
|| GET_CODE (src
) == CONST_DOUBLE
)
2912 split_double (src
, &words
[0], &words
[1]);
2913 emit_insn (gen_rtx_SET (VOIDmode
,
2914 operand_subword (dest
, 0, TRUE
, mode
),
2917 emit_insn (gen_rtx_SET (VOIDmode
,
2918 operand_subword (dest
, 1, TRUE
, mode
),
2921 /* Mem-to-reg copy. */
2922 else if (GET_CODE (src
) == MEM
)
2924 /* If the high-address word is used in the address, we must load it
2925 last. Otherwise, load it first. */
2926 rtx addr
= XEXP (src
, 0);
2928 = (refers_to_regno_p (dregno
, dregno
+ 1, addr
, NULL
) != 0);
2930 /* The original code imples that we can't do
2931 move.x [rN+],rM move.x [rN],rM+1
2932 when rN is dead, because of REG_NOTES damage. That is
2933 consistent with what I've seen, so don't try it.
2935 We have two different cases here; if the addr is POST_INC,
2936 just pass it through, otherwise add constants. */
2938 if (GET_CODE (addr
) == POST_INC
)
2940 emit_insn (gen_rtx_SET (VOIDmode
,
2941 operand_subword (dest
, 0, TRUE
, mode
),
2942 change_address (src
, SImode
, addr
)));
2943 emit_insn (gen_rtx_SET (VOIDmode
,
2944 operand_subword (dest
, 1, TRUE
, mode
),
2945 change_address (src
, SImode
, addr
)));
2949 /* Make sure we don't get any other addresses with
2950 embedded postincrements. They should be stopped in
2951 GO_IF_LEGITIMATE_ADDRESS, but we're here for your
2953 if (side_effects_p (addr
))
2954 fatal_insn ("unexpected side-effects in address", addr
);
2956 emit_insn (gen_rtx_SET
2958 operand_subword (dest
, reverse
, TRUE
, mode
),
2961 plus_constant (addr
,
2962 reverse
* UNITS_PER_WORD
))));
2963 emit_insn (gen_rtx_SET
2965 operand_subword (dest
, ! reverse
, TRUE
, mode
),
2968 plus_constant (addr
,
2976 /* Reg-to-mem copy or clear mem. */
2977 else if (GET_CODE (dest
) == MEM
2978 && (GET_CODE (src
) == REG
2979 || src
== const0_rtx
2980 || src
== CONST0_RTX (DFmode
)))
2982 rtx addr
= XEXP (dest
, 0);
2984 if (GET_CODE (addr
) == POST_INC
)
2986 emit_insn (gen_rtx_SET (VOIDmode
,
2987 change_address (dest
, SImode
, addr
),
2988 operand_subword (src
, 0, TRUE
, mode
)));
2989 emit_insn (gen_rtx_SET (VOIDmode
,
2990 change_address (dest
, SImode
, addr
),
2991 operand_subword (src
, 1, TRUE
, mode
)));
2995 /* Make sure we don't get any other addresses with embedded
2996 postincrements. They should be stopped in
2997 GO_IF_LEGITIMATE_ADDRESS, but we're here for your safety. */
2998 if (side_effects_p (addr
))
2999 fatal_insn ("unexpected side-effects in address", addr
);
3001 emit_insn (gen_rtx_SET
3003 change_address (dest
, SImode
, addr
),
3004 operand_subword (src
, 0, TRUE
, mode
)));
3006 emit_insn (gen_rtx_SET
3008 change_address (dest
, SImode
,
3009 plus_constant (addr
,
3011 operand_subword (src
, 1, TRUE
, mode
)));
3023 /* This is in essence a copy of output_addr_const altered to output
3024 symbolic operands as PIC.
3026 FIXME: Add hooks similar to ASM_OUTPUT_SYMBOL_REF to get this effect in
3027 the "real" output_addr_const. All we need is one for LABEL_REF (and
3028 one for CODE_LABEL?). */
3031 cris_output_addr_const (file
, x
)
3038 switch (GET_CODE (x
))
3041 ASSERT_PLT_UNSPEC (x
);
3042 x
= XVECEXP (x
, 0, 0);
3049 const char *origstr
= XSTR (x
, 0);
3052 str
= (* targetm
.strip_name_encoding
) (origstr
);
3056 if (cris_pic_sympart_only
)
3058 assemble_name (file
, str
);
3059 fprintf (file
, ":PLTG");
3063 if (TARGET_AVOID_GOTPLT
)
3064 /* We shouldn't get here. */
3067 fprintf (file
, "[$%s+", reg_names
[PIC_OFFSET_TABLE_REGNUM
]);
3068 assemble_name (file
, XSTR (x
, 0));
3071 fprintf (file
, ":GOTPLT16]");
3073 fprintf (file
, ":GOTPLT]");
3076 else if (cris_gotless_symbol (x
))
3078 if (! cris_pic_sympart_only
)
3079 fprintf (file
, "$%s+", reg_names
[PIC_OFFSET_TABLE_REGNUM
]);
3080 assemble_name (file
, str
);
3081 fprintf (file
, ":GOTOFF");
3083 else if (cris_got_symbol (x
))
3085 if (cris_pic_sympart_only
)
3087 fprintf (file
, "[$%s+", reg_names
[PIC_OFFSET_TABLE_REGNUM
]);
3088 assemble_name (file
, XSTR (x
, 0));
3091 fprintf (file
, ":GOT16]");
3093 fprintf (file
, ":GOT]");
3096 LOSE_AND_RETURN ("unexpected PIC symbol", x
);
3099 if (! current_function_uses_pic_offset_table
)
3100 output_operand_lossage ("PIC register isn't set up");
3103 assemble_name (file
, XSTR (x
, 0));
3107 /* If we get one of those here, it should be dressed as PIC. Branch
3108 labels are normally output with the 'l' specifier, which means it
3109 will go directly to output_asm_label and not end up here. */
3110 if (GET_CODE (XEXP (x
, 0)) != CODE_LABEL
3111 && (GET_CODE (XEXP (x
, 0)) != NOTE
3112 || NOTE_LINE_NUMBER (XEXP (x
, 0)) != NOTE_INSN_DELETED_LABEL
))
3113 fatal_insn ("unexpected address expression", x
);
3117 if (cris_gotless_symbol (x
))
3119 if (! cris_pic_sympart_only
)
3120 fprintf (file
, "$%s+", reg_names
[PIC_OFFSET_TABLE_REGNUM
]);
3121 cris_output_addr_const (file
, XEXP (x
, 0));
3123 fprintf (file
, ":GOTOFF");
3126 /* Labels are never marked as global symbols. */
3127 fatal_insn ("unexpected PIC symbol", x
);
3130 if (! current_function_uses_pic_offset_table
)
3131 internal_error ("emitting PIC operand, but PIC register isn't set up");
3135 output_addr_const (file
, x
);
3139 if (NOTE_LINE_NUMBER (x
) != NOTE_INSN_DELETED_LABEL
)
3140 fatal_insn ("unexpected NOTE as addr_const:", x
);
3146 output_addr_const (file
, x
);
3150 /* This used to output parentheses around the expression,
3151 but that does not work on the 386 (either ATT or BSD assembler). */
3152 cris_output_addr_const (file
, XEXP (x
, 0));
3156 /* Some assemblers need integer constants to appear last (eg masm). */
3157 if (GET_CODE (XEXP (x
, 0)) == CONST_INT
)
3159 cris_output_addr_const (file
, XEXP (x
, 1));
3160 if (INTVAL (XEXP (x
, 0)) >= 0)
3161 fprintf (file
, "+");
3162 output_addr_const (file
, XEXP (x
, 0));
3166 cris_output_addr_const (file
, XEXP (x
, 0));
3167 if (GET_CODE (XEXP (x
, 1)) != CONST_INT
3168 || INTVAL (XEXP (x
, 1)) >= 0)
3169 fprintf (file
, "+");
3170 cris_output_addr_const (file
, XEXP (x
, 1));
3175 /* Avoid outputting things like x-x or x+5-x,
3176 since some assemblers can't handle that. */
3177 x
= simplify_subtraction (x
);
3178 if (GET_CODE (x
) != MINUS
)
3181 cris_output_addr_const (file
, XEXP (x
, 0));
3182 fprintf (file
, "-");
3183 if ((GET_CODE (XEXP (x
, 1)) == CONST_INT
3184 && INTVAL (XEXP (x
, 1)) < 0)
3185 || GET_CODE (XEXP (x
, 1)) != CONST_INT
)
3187 fprintf (file
, "%s", targetm
.asm_out
.open_paren
);
3188 cris_output_addr_const (file
, XEXP (x
, 1));
3189 fprintf (file
, "%s", targetm
.asm_out
.close_paren
);
3192 output_addr_const (file
, XEXP (x
, 1));
3196 LOSE_AND_RETURN ("unexpected address expression", x
);
3201 /* Various small functions to replace macros. Only called from a
3202 debugger. They might collide with gcc functions or system functions,
3203 so only emit them when '#if 1' above. */
3205 enum rtx_code Get_code
PARAMS ((rtx
));
3211 return GET_CODE (x
);
3214 const char *Get_mode
PARAMS ((rtx
));
3220 return GET_MODE_NAME (GET_MODE (x
));
3223 rtx Xexp
PARAMS ((rtx
, int));
3233 rtx Xvecexp
PARAMS ((rtx
, int, int));
3240 return XVECEXP (x
, n
, m
);
3243 int Get_rtx_len
PARAMS ((rtx
));
3249 return GET_RTX_LENGTH (GET_CODE (x
));
3252 /* Use upper-case to distinguish from local variables that are sometimes
3253 called next_insn and prev_insn. */
3255 rtx Next_insn
PARAMS ((rtx
));
3261 return NEXT_INSN (insn
);
3264 rtx Prev_insn
PARAMS ((rtx
));
3270 return PREV_INSN (insn
);
3274 #include "gt-cris.h"
3278 * eval: (c-set-style "gnu")
3279 * indent-tabs-mode: t