1 /* Target Code for moxie
2 Copyright (C) 2008, 2009, 2010 Free Software Foundation
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"
27 #include "hard-reg-set.h"
28 #include "insn-config.h"
29 #include "conditions.h"
30 #include "insn-flags.h"
32 #include "insn-attr.h"
36 #include "diagnostic-core.h"
45 #include "target-def.h"
47 #include "langhooks.h"
50 #define LOSE_AND_RETURN(msgid, x) \
53 moxie_operand_lossage (msgid, x); \
57 /* Worker function for TARGET_RETURN_IN_MEMORY. */
60 moxie_return_in_memory (const_tree type
, const_tree fntype ATTRIBUTE_UNUSED
)
62 const HOST_WIDE_INT size
= int_size_in_bytes (type
);
63 return (size
== -1 || size
> 2 * UNITS_PER_WORD
);
66 /* Define how to find the value returned by a function.
67 VALTYPE is the data type of the value (as a tree).
68 If the precise function being called is known, FUNC is its
69 FUNCTION_DECL; otherwise, FUNC is 0.
71 We always return values in register $r0 for moxie. */
74 moxie_function_value (const_tree valtype
,
75 const_tree fntype_or_decl ATTRIBUTE_UNUSED
,
76 bool outgoing ATTRIBUTE_UNUSED
)
78 return gen_rtx_REG (TYPE_MODE (valtype
), MOXIE_R0
);
81 /* Define how to find the value returned by a library function.
83 We always return values in register $r0 for moxie. */
86 moxie_libcall_value (enum machine_mode mode
,
87 const_rtx fun ATTRIBUTE_UNUSED
)
89 return gen_rtx_REG (mode
, MOXIE_R0
);
92 /* Handle TARGET_FUNCTION_VALUE_REGNO_P.
94 We always return values in register $r0 for moxie. */
97 moxie_function_value_regno_p (const unsigned int regno
)
99 return (regno
== MOXIE_R0
);
102 /* Emit an error message when we're in an asm, and a fatal error for
103 "normal" insns. Formatted output isn't easily implemented, since we
104 use output_operand_lossage to output the actual message and handle the
105 categorization of the error. */
108 moxie_operand_lossage (const char *msgid
, rtx op
)
111 output_operand_lossage ("%s", msgid
);
114 /* The PRINT_OPERAND_ADDRESS worker. */
117 moxie_print_operand_address (FILE *file
, rtx x
)
119 switch (GET_CODE (x
))
122 fprintf (file
, "(%s)", reg_names
[REGNO (x
)]);
126 switch (GET_CODE (XEXP (x
, 1)))
129 fprintf (file
, "%ld(%s)",
130 INTVAL(XEXP (x
, 1)), reg_names
[REGNO (XEXP (x
, 0))]);
133 output_addr_const (file
, XEXP (x
, 1));
134 fprintf (file
, "(%s)", reg_names
[REGNO (XEXP (x
, 0))]);
138 rtx plus
= XEXP (XEXP (x
, 1), 0);
139 if (GET_CODE (XEXP (plus
, 0)) == SYMBOL_REF
140 && CONST_INT_P (XEXP (plus
, 1)))
142 output_addr_const(file
, XEXP (plus
, 0));
143 fprintf (file
,"+%ld(%s)", INTVAL (XEXP (plus
, 1)),
144 reg_names
[REGNO (XEXP (x
, 0))]);
156 output_addr_const (file
, x
);
161 /* The PRINT_OPERAND worker. */
164 moxie_print_operand (FILE *file
, rtx x
, int code
)
168 /* New code entries should just be added to the switch below. If
169 handling is finished, just return. If handling was just a
170 modification of the operand, the modified operand should be put in
171 "operand", and then do a break to let default handling
172 (zero-modifier) output the operand. */
177 /* No code, print as usual. */
181 LOSE_AND_RETURN ("invalid operand modifier letter", x
);
184 /* Print an operand as without a modifier letter. */
185 switch (GET_CODE (operand
))
188 if (REGNO (operand
) > MOXIE_R13
)
189 internal_error ("internal error: bad register: %d", REGNO (operand
));
190 fprintf (file
, "%s", reg_names
[REGNO (operand
)]);
194 output_address (XEXP (operand
, 0));
198 /* No need to handle all strange variants, let output_addr_const
200 if (CONSTANT_P (operand
))
202 output_addr_const (file
, operand
);
206 LOSE_AND_RETURN ("unexpected operand", x
);
210 /* Per-function machine data. */
211 struct GTY(()) machine_function
213 /* Number of bytes saved on the stack for callee saved registers. */
214 int callee_saved_reg_size
;
216 /* Number of bytes saved on the stack for local variables. */
219 /* The sum of 2 sizes: locals vars and padding byte for saving the
220 * registers. Used in expand_prologue () and expand_epilogue(). */
221 int size_for_adjusting_sp
;
224 /* Zero initialization is OK for all current fields. */
226 static struct machine_function
*
227 moxie_init_machine_status (void)
229 return ggc_alloc_cleared_machine_function ();
233 /* The TARGET_OPTION_OVERRIDE worker.
234 All this curently does is set init_machine_status. */
236 moxie_option_override (void)
238 /* Set the per-function-data initializer. */
239 init_machine_status
= moxie_init_machine_status
;
242 /* Compute the size of the local area and the size to be adjusted by the
243 * prologue and epilogue. */
246 moxie_compute_frame (void)
248 /* For aligning the local variables. */
249 int stack_alignment
= STACK_BOUNDARY
/ BITS_PER_UNIT
;
253 /* Padding needed for each element of the frame. */
254 cfun
->machine
->local_vars_size
= get_frame_size ();
256 /* Align to the stack alignment. */
257 padding_locals
= cfun
->machine
->local_vars_size
% stack_alignment
;
259 padding_locals
= stack_alignment
- padding_locals
;
261 cfun
->machine
->local_vars_size
+= padding_locals
;
263 cfun
->machine
->callee_saved_reg_size
= 0;
265 /* Save callee-saved registers. */
266 for (regno
= 0; regno
< FIRST_PSEUDO_REGISTER
; regno
++)
267 if (df_regs_ever_live_p (regno
) && (! call_used_regs
[regno
]))
268 cfun
->machine
->callee_saved_reg_size
+= 4;
270 cfun
->machine
->size_for_adjusting_sp
=
271 crtl
->args
.pretend_args_size
272 + cfun
->machine
->local_vars_size
273 + (ACCUMULATE_OUTGOING_ARGS
? crtl
->outgoing_args_size
: 0);
277 moxie_expand_prologue (void)
282 moxie_compute_frame ();
284 /* Save callee-saved registers. */
285 for (regno
= 0; regno
< FIRST_PSEUDO_REGISTER
; regno
++)
287 if (!fixed_regs
[regno
] && df_regs_ever_live_p (regno
) && !call_used_regs
[regno
])
289 insn
= emit_insn (gen_movsi_push (gen_rtx_REG (Pmode
, regno
)));
290 RTX_FRAME_RELATED_P (insn
) = 1;
294 if (cfun
->machine
->size_for_adjusting_sp
> 0)
296 int i
= cfun
->machine
->size_for_adjusting_sp
;
299 insn
= emit_insn (gen_subsi3 (stack_pointer_rtx
,
302 RTX_FRAME_RELATED_P (insn
) = 1;
307 insn
= emit_insn (gen_subsi3 (stack_pointer_rtx
,
310 RTX_FRAME_RELATED_P (insn
) = 1;
316 moxie_expand_epilogue (void)
321 if (cfun
->machine
->callee_saved_reg_size
!= 0)
323 reg
= gen_rtx_REG (Pmode
, MOXIE_R5
);
324 if (cfun
->machine
->callee_saved_reg_size
<= 255)
326 emit_move_insn (reg
, hard_frame_pointer_rtx
);
327 emit_insn (gen_subsi3
329 GEN_INT (cfun
->machine
->callee_saved_reg_size
)));
334 GEN_INT (-cfun
->machine
->callee_saved_reg_size
));
335 emit_insn (gen_addsi3 (reg
, reg
, hard_frame_pointer_rtx
));
337 for (regno
= FIRST_PSEUDO_REGISTER
; regno
-- > 0; )
338 if (!fixed_regs
[regno
] && !call_used_regs
[regno
]
339 && df_regs_ever_live_p (regno
))
341 rtx preg
= gen_rtx_REG (Pmode
, regno
);
342 emit_insn (gen_movsi_pop (reg
, preg
));
346 emit_jump_insn (gen_returner ());
349 /* Implements the macro INITIAL_ELIMINATION_OFFSET, return the OFFSET. */
352 moxie_initial_elimination_offset (int from
, int to
)
356 if ((from
) == FRAME_POINTER_REGNUM
&& (to
) == HARD_FRAME_POINTER_REGNUM
)
358 /* Compute this since we need to use cfun->machine->local_vars_size. */
359 moxie_compute_frame ();
360 ret
= -cfun
->machine
->callee_saved_reg_size
;
362 else if ((from
) == ARG_POINTER_REGNUM
&& (to
) == HARD_FRAME_POINTER_REGNUM
)
370 /* Worker function for TARGET_SETUP_INCOMING_VARARGS. */
373 moxie_setup_incoming_varargs (CUMULATIVE_ARGS
*cum
,
374 enum machine_mode mode ATTRIBUTE_UNUSED
,
375 tree type ATTRIBUTE_UNUSED
,
376 int *pretend_size
, int no_rtl
)
381 *pretend_size
= regs
< 0 ? 0 : GET_MODE_SIZE (SImode
) * regs
;
386 for (regno
= *cum
; regno
< 8; regno
++)
388 rtx reg
= gen_rtx_REG (SImode
, regno
);
389 rtx slot
= gen_rtx_PLUS (Pmode
,
390 gen_rtx_REG (SImode
, ARG_POINTER_REGNUM
),
391 GEN_INT (UNITS_PER_WORD
* (3 + (regno
-2))));
393 emit_move_insn (gen_rtx_MEM (SImode
, slot
), reg
);
398 /* Return the fixed registers used for condition codes. */
401 moxie_fixed_condition_code_regs (unsigned int *p1
, unsigned int *p2
)
404 *p2
= INVALID_REGNUM
;
408 /* Return the next register to be used to hold a function argument or
409 NULL_RTX if there's no more space. */
412 moxie_function_arg (CUMULATIVE_ARGS
*cum
, enum machine_mode mode
,
413 const_tree type ATTRIBUTE_UNUSED
,
414 bool named ATTRIBUTE_UNUSED
)
417 return gen_rtx_REG (mode
, *cum
);
422 #define MOXIE_FUNCTION_ARG_SIZE(MODE, TYPE) \
423 ((MODE) != BLKmode ? GET_MODE_SIZE (MODE) \
424 : (unsigned) int_size_in_bytes (TYPE))
427 moxie_function_arg_advance (CUMULATIVE_ARGS
*cum
, enum machine_mode mode
,
428 const_tree type
, bool named ATTRIBUTE_UNUSED
)
430 *cum
= (*cum
< MOXIE_R6
431 ? *cum
+ ((3 + MOXIE_FUNCTION_ARG_SIZE (mode
, type
)) / 4)
435 /* Return non-zero if the function argument described by TYPE is to be
436 passed by reference. */
439 moxie_pass_by_reference (CUMULATIVE_ARGS
*cum ATTRIBUTE_UNUSED
,
440 enum machine_mode mode
, const_tree type
,
441 bool named ATTRIBUTE_UNUSED
)
443 unsigned HOST_WIDE_INT size
;
447 if (AGGREGATE_TYPE_P (type
))
449 size
= int_size_in_bytes (type
);
452 size
= GET_MODE_SIZE (mode
);
457 /* Some function arguments will only partially fit in the registers
458 that hold arguments. Given a new arg, return the number of bytes
459 that fit in argument passing registers. */
462 moxie_arg_partial_bytes (CUMULATIVE_ARGS
*cum
,
463 enum machine_mode mode
,
464 tree type
, bool named
)
466 int bytes_left
, size
;
471 if (moxie_pass_by_reference (cum
, mode
, type
, named
))
475 if (AGGREGATE_TYPE_P (type
))
477 size
= int_size_in_bytes (type
);
480 size
= GET_MODE_SIZE (mode
);
482 bytes_left
= (4 * 6) - ((*cum
- 2) * 4);
484 if (size
> bytes_left
)
490 /* Worker function for TARGET_STATIC_CHAIN. */
493 moxie_static_chain (const_tree fndecl
, bool incoming_p
)
497 if (!DECL_STATIC_CHAIN (fndecl
))
501 addr
= plus_constant (arg_pointer_rtx
, 2 * UNITS_PER_WORD
);
503 addr
= plus_constant (stack_pointer_rtx
, -UNITS_PER_WORD
);
505 mem
= gen_rtx_MEM (Pmode
, addr
);
506 MEM_NOTRAP_P (mem
) = 1;
511 /* Worker function for TARGET_ASM_TRAMPOLINE_TEMPLATE. */
514 moxie_asm_trampoline_template (FILE *f
)
516 fprintf (f
, "\tpush $sp, $r0\n");
517 fprintf (f
, "\tldi.l $r0, 0x0\n");
518 fprintf (f
, "\tsto.l 0x8($fp), $r0\n");
519 fprintf (f
, "\tpop $sp, $r0\n");
520 fprintf (f
, "\tnop\n");
521 fprintf (f
, "\tjmpa 0x0\n");
524 /* Worker function for TARGET_TRAMPOLINE_INIT. */
527 moxie_trampoline_init (rtx m_tramp
, tree fndecl
, rtx chain_value
)
529 rtx mem
, fnaddr
= XEXP (DECL_RTL (fndecl
), 0);
531 emit_block_move (m_tramp
, assemble_trampoline_template (),
532 GEN_INT (TRAMPOLINE_SIZE
), BLOCK_OP_NORMAL
);
534 mem
= adjust_address (m_tramp
, SImode
, 4);
535 emit_move_insn (mem
, chain_value
);
536 mem
= adjust_address (m_tramp
, SImode
, 20);
537 emit_move_insn (mem
, fnaddr
);
540 /* The Global `targetm' Variable. */
542 /* Initialize the GCC target structure. */
544 #undef TARGET_PROMOTE_PROTOTYPES
545 #define TARGET_PROMOTE_PROTOTYPES hook_bool_const_tree_true
547 #undef TARGET_RETURN_IN_MEMORY
548 #define TARGET_RETURN_IN_MEMORY moxie_return_in_memory
549 #undef TARGET_MUST_PASS_IN_STACK
550 #define TARGET_MUST_PASS_IN_STACK must_pass_in_stack_var_size
551 #undef TARGET_PASS_BY_REFERENCE
552 #define TARGET_PASS_BY_REFERENCE moxie_pass_by_reference
553 #undef TARGET_ARG_PARTIAL_BYTES
554 #define TARGET_ARG_PARTIAL_BYTES moxie_arg_partial_bytes
555 #undef TARGET_FUNCTION_ARG
556 #define TARGET_FUNCTION_ARG moxie_function_arg
557 #undef TARGET_FUNCTION_ARG_ADVANCE
558 #define TARGET_FUNCTION_ARG_ADVANCE moxie_function_arg_advance
561 #undef TARGET_SETUP_INCOMING_VARARGS
562 #define TARGET_SETUP_INCOMING_VARARGS moxie_setup_incoming_varargs
564 #undef TARGET_FIXED_CONDITION_CODE_REGS
565 #define TARGET_FIXED_CONDITION_CODE_REGS moxie_fixed_condition_code_regs
567 /* Define this to return an RTX representing the place where a
568 function returns or receives a value of data type RET_TYPE, a tree
569 node node representing a data type. */
570 #undef TARGET_FUNCTION_VALUE
571 #define TARGET_FUNCTION_VALUE moxie_function_value
572 #undef TARGET_LIBCALL_VALUE
573 #define TARGET_LIBCALL_VALUE moxie_libcall_value
574 #undef TARGET_FUNCTION_VALUE_REGNO_P
575 #define TARGET_FUNCTION_VALUE_REGNO_P moxie_function_value_regno_p
577 #undef TARGET_FRAME_POINTER_REQUIRED
578 #define TARGET_FRAME_POINTER_REQUIRED hook_bool_void_true
580 #undef TARGET_STATIC_CHAIN
581 #define TARGET_STATIC_CHAIN moxie_static_chain
582 #undef TARGET_ASM_TRAMPOLINE_TEMPLATE
583 #define TARGET_ASM_TRAMPOLINE_TEMPLATE moxie_asm_trampoline_template
584 #undef TARGET_TRAMPOLINE_INIT
585 #define TARGET_TRAMPOLINE_INIT moxie_trampoline_init
587 #undef TARGET_OPTION_OVERRIDE
588 #define TARGET_OPTION_OVERRIDE moxie_option_override
590 struct gcc_target targetm
= TARGET_INITIALIZER
;
592 #include "gt-moxie.h"