1 /* Target Code for moxie
2 Copyright (C) 2008-2016 Free Software Foundation, Inc.
3 Contributed by Anthony Green.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published
9 by the Free Software Foundation; either version 3, or (at your
10 option) any later version.
12 GCC is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 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/>. */
23 #include "coretypes.h"
31 #include "diagnostic-core.h"
33 #include "stor-layout.h"
39 /* This file should be included last. */
40 #include "target-def.h"
42 #define LOSE_AND_RETURN(msgid, x) \
45 moxie_operand_lossage (msgid, x); \
49 /* Worker function for TARGET_RETURN_IN_MEMORY. */
52 moxie_return_in_memory (const_tree type
, const_tree fntype ATTRIBUTE_UNUSED
)
54 const HOST_WIDE_INT size
= int_size_in_bytes (type
);
55 return (size
== -1 || size
> 2 * UNITS_PER_WORD
);
58 /* Define how to find the value returned by a function.
59 VALTYPE is the data type of the value (as a tree).
60 If the precise function being called is known, FUNC is its
61 FUNCTION_DECL; otherwise, FUNC is 0.
63 We always return values in register $r0 for moxie. */
66 moxie_function_value (const_tree valtype
,
67 const_tree fntype_or_decl ATTRIBUTE_UNUSED
,
68 bool outgoing ATTRIBUTE_UNUSED
)
70 return gen_rtx_REG (TYPE_MODE (valtype
), MOXIE_R0
);
73 /* Define how to find the value returned by a library function.
75 We always return values in register $r0 for moxie. */
78 moxie_libcall_value (machine_mode mode
,
79 const_rtx fun ATTRIBUTE_UNUSED
)
81 return gen_rtx_REG (mode
, MOXIE_R0
);
84 /* Handle TARGET_FUNCTION_VALUE_REGNO_P.
86 We always return values in register $r0 for moxie. */
89 moxie_function_value_regno_p (const unsigned int regno
)
91 return (regno
== MOXIE_R0
);
94 /* Emit an error message when we're in an asm, and a fatal error for
95 "normal" insns. Formatted output isn't easily implemented, since we
96 use output_operand_lossage to output the actual message and handle the
97 categorization of the error. */
100 moxie_operand_lossage (const char *msgid
, rtx op
)
103 output_operand_lossage ("%s", msgid
);
106 /* The PRINT_OPERAND_ADDRESS worker. */
109 moxie_print_operand_address (FILE *file
, machine_mode
, rtx x
)
111 switch (GET_CODE (x
))
114 fprintf (file
, "(%s)", reg_names
[REGNO (x
)]);
118 switch (GET_CODE (XEXP (x
, 1)))
121 fprintf (file
, "%ld(%s)",
122 INTVAL(XEXP (x
, 1)), reg_names
[REGNO (XEXP (x
, 0))]);
125 output_addr_const (file
, XEXP (x
, 1));
126 fprintf (file
, "(%s)", reg_names
[REGNO (XEXP (x
, 0))]);
130 rtx plus
= XEXP (XEXP (x
, 1), 0);
131 if (GET_CODE (XEXP (plus
, 0)) == SYMBOL_REF
132 && CONST_INT_P (XEXP (plus
, 1)))
134 output_addr_const(file
, XEXP (plus
, 0));
135 fprintf (file
,"+%ld(%s)", INTVAL (XEXP (plus
, 1)),
136 reg_names
[REGNO (XEXP (x
, 0))]);
148 output_addr_const (file
, x
);
153 /* The PRINT_OPERAND worker. */
156 moxie_print_operand (FILE *file
, rtx x
, int code
)
160 /* New code entries should just be added to the switch below. If
161 handling is finished, just return. If handling was just a
162 modification of the operand, the modified operand should be put in
163 "operand", and then do a break to let default handling
164 (zero-modifier) output the operand. */
169 /* No code, print as usual. */
173 LOSE_AND_RETURN ("invalid operand modifier letter", x
);
176 /* Print an operand as without a modifier letter. */
177 switch (GET_CODE (operand
))
180 if (REGNO (operand
) > MOXIE_R13
)
181 internal_error ("internal error: bad register: %d", REGNO (operand
));
182 fprintf (file
, "%s", reg_names
[REGNO (operand
)]);
186 output_address (GET_MODE (XEXP (operand
, 0)), XEXP (operand
, 0));
190 /* No need to handle all strange variants, let output_addr_const
192 if (CONSTANT_P (operand
))
194 output_addr_const (file
, operand
);
198 LOSE_AND_RETURN ("unexpected operand", x
);
202 /* Per-function machine data. */
203 struct GTY(()) machine_function
205 /* Number of bytes saved on the stack for callee saved registers. */
206 int callee_saved_reg_size
;
208 /* Number of bytes saved on the stack for local variables. */
211 /* The sum of 2 sizes: locals vars and padding byte for saving the
212 * registers. Used in expand_prologue () and expand_epilogue(). */
213 int size_for_adjusting_sp
;
216 /* Zero initialization is OK for all current fields. */
218 static struct machine_function
*
219 moxie_init_machine_status (void)
221 return ggc_cleared_alloc
<machine_function
> ();
225 /* The TARGET_OPTION_OVERRIDE worker. */
227 moxie_option_override (void)
229 /* Set the per-function-data initializer. */
230 init_machine_status
= moxie_init_machine_status
;
232 #ifdef TARGET_MOXIEBOX
233 target_flags
|= MASK_HAS_MULX
;
237 /* Compute the size of the local area and the size to be adjusted by the
238 * prologue and epilogue. */
241 moxie_compute_frame (void)
243 /* For aligning the local variables. */
244 int stack_alignment
= STACK_BOUNDARY
/ BITS_PER_UNIT
;
248 /* Padding needed for each element of the frame. */
249 cfun
->machine
->local_vars_size
= get_frame_size ();
251 /* Align to the stack alignment. */
252 padding_locals
= cfun
->machine
->local_vars_size
% stack_alignment
;
254 padding_locals
= stack_alignment
- padding_locals
;
256 cfun
->machine
->local_vars_size
+= padding_locals
;
258 cfun
->machine
->callee_saved_reg_size
= 0;
260 /* Save callee-saved registers. */
261 for (regno
= 0; regno
< FIRST_PSEUDO_REGISTER
; regno
++)
262 if (df_regs_ever_live_p (regno
) && (! call_used_regs
[regno
]))
263 cfun
->machine
->callee_saved_reg_size
+= 4;
265 cfun
->machine
->size_for_adjusting_sp
=
266 crtl
->args
.pretend_args_size
267 + cfun
->machine
->local_vars_size
268 + (ACCUMULATE_OUTGOING_ARGS
? crtl
->outgoing_args_size
: 0);
272 moxie_expand_prologue (void)
277 moxie_compute_frame ();
279 if (flag_stack_usage_info
)
280 current_function_static_stack_size
= cfun
->machine
->size_for_adjusting_sp
;
282 /* Save callee-saved registers. */
283 for (regno
= 0; regno
< FIRST_PSEUDO_REGISTER
; regno
++)
285 if (!fixed_regs
[regno
] && df_regs_ever_live_p (regno
) && !call_used_regs
[regno
])
287 insn
= emit_insn (gen_movsi_push (gen_rtx_REG (Pmode
, regno
)));
288 RTX_FRAME_RELATED_P (insn
) = 1;
292 if (cfun
->machine
->size_for_adjusting_sp
> 0)
294 int i
= cfun
->machine
->size_for_adjusting_sp
;
295 while ((i
>= 255) && (i
<= 510))
297 insn
= emit_insn (gen_subsi3 (stack_pointer_rtx
,
300 RTX_FRAME_RELATED_P (insn
) = 1;
305 insn
= emit_insn (gen_subsi3 (stack_pointer_rtx
,
308 RTX_FRAME_RELATED_P (insn
) = 1;
312 rtx reg
= gen_rtx_REG (SImode
, MOXIE_R12
);
313 insn
= emit_move_insn (reg
, GEN_INT (i
));
314 RTX_FRAME_RELATED_P (insn
) = 1;
315 insn
= emit_insn (gen_subsi3 (stack_pointer_rtx
,
318 RTX_FRAME_RELATED_P (insn
) = 1;
324 moxie_expand_epilogue (void)
329 if (cfun
->machine
->callee_saved_reg_size
!= 0)
331 reg
= gen_rtx_REG (Pmode
, MOXIE_R12
);
332 if (cfun
->machine
->callee_saved_reg_size
<= 255)
334 emit_move_insn (reg
, hard_frame_pointer_rtx
);
335 emit_insn (gen_subsi3
337 GEN_INT (cfun
->machine
->callee_saved_reg_size
)));
342 GEN_INT (-cfun
->machine
->callee_saved_reg_size
));
343 emit_insn (gen_addsi3 (reg
, reg
, hard_frame_pointer_rtx
));
345 for (regno
= FIRST_PSEUDO_REGISTER
; regno
-- > 0; )
346 if (!fixed_regs
[regno
] && !call_used_regs
[regno
]
347 && df_regs_ever_live_p (regno
))
349 rtx preg
= gen_rtx_REG (Pmode
, regno
);
350 emit_insn (gen_movsi_pop (reg
, preg
));
354 emit_jump_insn (gen_returner ());
357 /* Implements the macro INITIAL_ELIMINATION_OFFSET, return the OFFSET. */
360 moxie_initial_elimination_offset (int from
, int to
)
364 if ((from
) == FRAME_POINTER_REGNUM
&& (to
) == HARD_FRAME_POINTER_REGNUM
)
366 /* Compute this since we need to use cfun->machine->local_vars_size. */
367 moxie_compute_frame ();
368 ret
= -cfun
->machine
->callee_saved_reg_size
;
370 else if ((from
) == ARG_POINTER_REGNUM
&& (to
) == HARD_FRAME_POINTER_REGNUM
)
378 /* Worker function for TARGET_SETUP_INCOMING_VARARGS. */
381 moxie_setup_incoming_varargs (cumulative_args_t cum_v
,
382 machine_mode mode ATTRIBUTE_UNUSED
,
383 tree type ATTRIBUTE_UNUSED
,
384 int *pretend_size
, int no_rtl
)
386 CUMULATIVE_ARGS
*cum
= get_cumulative_args (cum_v
);
390 *pretend_size
= regs
< 0 ? 0 : GET_MODE_SIZE (SImode
) * regs
;
395 for (regno
= *cum
; regno
< 8; regno
++)
397 rtx reg
= gen_rtx_REG (SImode
, regno
);
398 rtx slot
= gen_rtx_PLUS (Pmode
,
399 gen_rtx_REG (SImode
, ARG_POINTER_REGNUM
),
400 GEN_INT (UNITS_PER_WORD
* (3 + (regno
-2))));
402 emit_move_insn (gen_rtx_MEM (SImode
, slot
), reg
);
407 /* Return the fixed registers used for condition codes. */
410 moxie_fixed_condition_code_regs (unsigned int *p1
, unsigned int *p2
)
413 *p2
= INVALID_REGNUM
;
417 /* Return the next register to be used to hold a function argument or
418 NULL_RTX if there's no more space. */
421 moxie_function_arg (cumulative_args_t cum_v
, machine_mode mode
,
422 const_tree type ATTRIBUTE_UNUSED
,
423 bool named ATTRIBUTE_UNUSED
)
425 CUMULATIVE_ARGS
*cum
= get_cumulative_args (cum_v
);
428 return gen_rtx_REG (mode
, *cum
);
433 #define MOXIE_FUNCTION_ARG_SIZE(MODE, TYPE) \
434 ((MODE) != BLKmode ? GET_MODE_SIZE (MODE) \
435 : (unsigned) int_size_in_bytes (TYPE))
438 moxie_function_arg_advance (cumulative_args_t cum_v
, machine_mode mode
,
439 const_tree type
, bool named ATTRIBUTE_UNUSED
)
441 CUMULATIVE_ARGS
*cum
= get_cumulative_args (cum_v
);
443 *cum
= (*cum
< MOXIE_R6
444 ? *cum
+ ((3 + MOXIE_FUNCTION_ARG_SIZE (mode
, type
)) / 4)
448 /* Return non-zero if the function argument described by TYPE is to be
449 passed by reference. */
452 moxie_pass_by_reference (cumulative_args_t cum ATTRIBUTE_UNUSED
,
453 machine_mode mode
, const_tree type
,
454 bool named ATTRIBUTE_UNUSED
)
456 unsigned HOST_WIDE_INT size
;
460 if (AGGREGATE_TYPE_P (type
))
462 size
= int_size_in_bytes (type
);
465 size
= GET_MODE_SIZE (mode
);
470 /* Some function arguments will only partially fit in the registers
471 that hold arguments. Given a new arg, return the number of bytes
472 that fit in argument passing registers. */
475 moxie_arg_partial_bytes (cumulative_args_t cum_v
,
477 tree type
, bool named
)
479 CUMULATIVE_ARGS
*cum
= get_cumulative_args (cum_v
);
480 int bytes_left
, size
;
485 if (moxie_pass_by_reference (cum_v
, mode
, type
, named
))
489 if (AGGREGATE_TYPE_P (type
))
491 size
= int_size_in_bytes (type
);
494 size
= GET_MODE_SIZE (mode
);
496 bytes_left
= (4 * 6) - ((*cum
- 2) * 4);
498 if (size
> bytes_left
)
504 /* Worker function for TARGET_STATIC_CHAIN. */
507 moxie_static_chain (const_tree
ARG_UNUSED (fndecl_or_type
), bool incoming_p
)
512 addr
= plus_constant (Pmode
, arg_pointer_rtx
, 2 * UNITS_PER_WORD
);
514 addr
= plus_constant (Pmode
, stack_pointer_rtx
, -UNITS_PER_WORD
);
516 mem
= gen_rtx_MEM (Pmode
, addr
);
517 MEM_NOTRAP_P (mem
) = 1;
522 /* Worker function for TARGET_ASM_TRAMPOLINE_TEMPLATE. */
525 moxie_asm_trampoline_template (FILE *f
)
527 fprintf (f
, "\tpush $sp, $r0\n");
528 fprintf (f
, "\tldi.l $r0, 0x0\n");
529 fprintf (f
, "\tsto.l 0x8($fp), $r0\n");
530 fprintf (f
, "\tpop $sp, $r0\n");
531 fprintf (f
, "\tjmpa 0x0\n");
534 /* Worker function for TARGET_TRAMPOLINE_INIT. */
537 moxie_trampoline_init (rtx m_tramp
, tree fndecl
, rtx chain_value
)
539 rtx mem
, fnaddr
= XEXP (DECL_RTL (fndecl
), 0);
541 emit_block_move (m_tramp
, assemble_trampoline_template (),
542 GEN_INT (TRAMPOLINE_SIZE
), BLOCK_OP_NORMAL
);
544 mem
= adjust_address (m_tramp
, SImode
, 4);
545 emit_move_insn (mem
, chain_value
);
546 mem
= adjust_address (m_tramp
, SImode
, 16);
547 emit_move_insn (mem
, fnaddr
);
550 /* Return true for memory offset addresses between -32768 and 32767. */
552 moxie_offset_address_p (rtx x
)
556 if (GET_CODE (x
) == PLUS
)
559 if (GET_CODE (x
) == CONST_INT
)
561 unsigned int v
= INTVAL (x
) & 0xFFFF8000;
562 return (v
== 0xFFFF8000 || v
== 0x00000000);
568 /* Helper function for `moxie_legitimate_address_p'. */
571 moxie_reg_ok_for_base_p (const_rtx reg
, bool strict_p
)
573 int regno
= REGNO (reg
);
576 return HARD_REGNO_OK_FOR_BASE_P (regno
)
577 || HARD_REGNO_OK_FOR_BASE_P (reg_renumber
[regno
]);
579 return !HARD_REGISTER_NUM_P (regno
)
580 || HARD_REGNO_OK_FOR_BASE_P (regno
);
583 /* Worker function for TARGET_LEGITIMATE_ADDRESS_P. */
586 moxie_legitimate_address_p (machine_mode mode ATTRIBUTE_UNUSED
,
587 rtx x
, bool strict_p
,
590 gcc_assert (ADDR_SPACE_GENERIC_P (as
));
592 if (GET_CODE(x
) == PLUS
593 && REG_P (XEXP (x
, 0))
594 && moxie_reg_ok_for_base_p (XEXP (x
, 0), strict_p
)
595 && CONST_INT_P (XEXP (x
, 1))
596 && IN_RANGE (INTVAL (XEXP (x
, 1)), -32768, 32767))
598 if (REG_P (x
) && moxie_reg_ok_for_base_p (x
, strict_p
))
600 if (GET_CODE (x
) == SYMBOL_REF
601 || GET_CODE (x
) == LABEL_REF
602 || GET_CODE (x
) == CONST
)
607 /* The Global `targetm' Variable. */
609 /* Initialize the GCC target structure. */
611 #undef TARGET_PROMOTE_PROTOTYPES
612 #define TARGET_PROMOTE_PROTOTYPES hook_bool_const_tree_true
614 #undef TARGET_RETURN_IN_MEMORY
615 #define TARGET_RETURN_IN_MEMORY moxie_return_in_memory
616 #undef TARGET_MUST_PASS_IN_STACK
617 #define TARGET_MUST_PASS_IN_STACK must_pass_in_stack_var_size
618 #undef TARGET_PASS_BY_REFERENCE
619 #define TARGET_PASS_BY_REFERENCE moxie_pass_by_reference
620 #undef TARGET_ARG_PARTIAL_BYTES
621 #define TARGET_ARG_PARTIAL_BYTES moxie_arg_partial_bytes
622 #undef TARGET_FUNCTION_ARG
623 #define TARGET_FUNCTION_ARG moxie_function_arg
624 #undef TARGET_FUNCTION_ARG_ADVANCE
625 #define TARGET_FUNCTION_ARG_ADVANCE moxie_function_arg_advance
628 #define TARGET_LRA_P hook_bool_void_false
630 #undef TARGET_ADDR_SPACE_LEGITIMATE_ADDRESS_P
631 #define TARGET_ADDR_SPACE_LEGITIMATE_ADDRESS_P moxie_legitimate_address_p
633 #undef TARGET_SETUP_INCOMING_VARARGS
634 #define TARGET_SETUP_INCOMING_VARARGS moxie_setup_incoming_varargs
636 #undef TARGET_FIXED_CONDITION_CODE_REGS
637 #define TARGET_FIXED_CONDITION_CODE_REGS moxie_fixed_condition_code_regs
639 /* Define this to return an RTX representing the place where a
640 function returns or receives a value of data type RET_TYPE, a tree
641 node representing a data type. */
642 #undef TARGET_FUNCTION_VALUE
643 #define TARGET_FUNCTION_VALUE moxie_function_value
644 #undef TARGET_LIBCALL_VALUE
645 #define TARGET_LIBCALL_VALUE moxie_libcall_value
646 #undef TARGET_FUNCTION_VALUE_REGNO_P
647 #define TARGET_FUNCTION_VALUE_REGNO_P moxie_function_value_regno_p
649 #undef TARGET_FRAME_POINTER_REQUIRED
650 #define TARGET_FRAME_POINTER_REQUIRED hook_bool_void_true
652 #undef TARGET_STATIC_CHAIN
653 #define TARGET_STATIC_CHAIN moxie_static_chain
654 #undef TARGET_ASM_TRAMPOLINE_TEMPLATE
655 #define TARGET_ASM_TRAMPOLINE_TEMPLATE moxie_asm_trampoline_template
656 #undef TARGET_TRAMPOLINE_INIT
657 #define TARGET_TRAMPOLINE_INIT moxie_trampoline_init
659 #undef TARGET_OPTION_OVERRIDE
660 #define TARGET_OPTION_OVERRIDE moxie_option_override
662 #undef TARGET_PRINT_OPERAND
663 #define TARGET_PRINT_OPERAND moxie_print_operand
664 #undef TARGET_PRINT_OPERAND_ADDRESS
665 #define TARGET_PRINT_OPERAND_ADDRESS moxie_print_operand_address
667 struct gcc_target targetm
= TARGET_INITIALIZER
;
669 #include "gt-moxie.h"