1 /* FR30 specific functions.
2 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004
3 Free Software Foundation, Inc.
4 Contributed by Cygnus Solutions.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
27 #include "coretypes.h"
31 #include "hard-reg-set.h"
33 #include "insn-config.h"
34 #include "conditions.h"
35 #include "insn-attr.h"
47 #include "target-def.h"
50 /*{{{ Function Prologues & Epilogues */
52 /* Define the information needed to generate branch and scc insns. This is
53 stored from the compare operation. */
55 struct rtx_def * fr30_compare_op0;
56 struct rtx_def * fr30_compare_op1;
58 /* The FR30 stack looks like this:
60 Before call After call
62 +-----------------------+ +-----------------------+ high
64 | local variables, | | local variables, |
65 | reg save area, etc. | | reg save area, etc. |
67 +-----------------------+ +-----------------------+
69 | args to the func that | | args to this func. |
70 | is being called that | | |
71 SP ->| do not fit in regs | | |
72 +-----------------------+ +-----------------------+
73 | args that used to be | \
74 | in regs; only created | | pretend_size
75 AP-> | for vararg funcs | /
76 +-----------------------+
78 | register save area | |
80 +-----------------------+ | reg_size
82 +-----------------------+ |
83 FP ->| previous frame ptr | /
84 +-----------------------+
86 | local variables | | var_size
88 +-----------------------+
90 low | room for args to | |
91 memory | other funcs called | | args_size
94 +-----------------------+
96 Note, AP is a fake hard register. It will be eliminated in favor of
97 SP or FP as appropriate.
99 Note, Some or all of the stack sections above may be omitted if they
102 /* Structure to be filled in by fr30_compute_frame_size() with register
103 save masks, and offsets for the current function. */
104 struct fr30_frame_info
106 unsigned int total_size; /* # Bytes that the entire frame takes up. */
107 unsigned int pretend_size; /* # Bytes we push and pretend caller did. */
108 unsigned int args_size; /* # Bytes that outgoing arguments take up. */
109 unsigned int reg_size; /* # Bytes needed to store regs. */
110 unsigned int var_size; /* # Bytes that variables take up. */
111 unsigned int frame_size; /* # Bytes in current frame. */
112 unsigned int gmask; /* Mask of saved registers. */
113 unsigned int save_fp; /* Nonzero if frame pointer must be saved. */
114 unsigned int save_rp; /* Nonzero if return pointer must be saved. */
115 int initialised; /* Nonzero if frame size already calculated. */
118 /* Current frame information calculated by fr30_compute_frame_size(). */
119 static struct fr30_frame_info current_frame_info;
121 /* Zero structure to initialize current_frame_info. */
122 static struct fr30_frame_info zero_frame_info;
124 static void fr30_setup_incoming_varargs (CUMULATIVE_ARGS *, enum machine_mode,
126 static tree fr30_gimplify_va_arg_expr (tree, tree, tree *, tree *);
127 static bool fr30_must_pass_in_stack (enum machine_mode, tree);
129 #define FRAME_POINTER_MASK (1 << (FRAME_POINTER_REGNUM))
130 #define RETURN_POINTER_MASK (1 << (RETURN_POINTER_REGNUM))
132 /* Tell prologue and epilogue if register REGNO should be saved / restored.
133 The return address and frame pointer are treated separately.
134 Don't consider them here. */
135 #define MUST_SAVE_REGISTER(regno) \
136 ( (regno) != RETURN_POINTER_REGNUM \
137 && (regno) != FRAME_POINTER_REGNUM \
138 && regs_ever_live [regno] \
139 && ! call_used_regs [regno] )
141 #define MUST_SAVE_FRAME_POINTER (regs_ever_live [FRAME_POINTER_REGNUM] || frame_pointer_needed)
142 #define MUST_SAVE_RETURN_POINTER (regs_ever_live [RETURN_POINTER_REGNUM] || current_function_profile)
144 #if UNITS_PER_WORD == 4
145 #define WORD_ALIGN(SIZE) (((SIZE) + 3) & ~3)
148 /* Initialize the GCC target structure. */
149 #undef TARGET_ASM_ALIGNED_HI_OP
150 #define TARGET_ASM_ALIGNED_HI_OP "\t.hword\t"
151 #undef TARGET_ASM_ALIGNED_SI_OP
152 #define TARGET_ASM_ALIGNED_SI_OP "\t.word\t"
154 #undef TARGET_PROMOTE_PROTOTYPES
155 #define TARGET_PROMOTE_PROTOTYPES hook_bool_tree_true
156 #undef TARGET_SETUP_INCOMING_VARARGS
157 #define TARGET_SETUP_INCOMING_VARARGS fr30_setup_incoming_varargs
158 #undef TARGET_MUST_PASS_IN_STACK
159 #define TARGET_MUST_PASS_IN_STACK fr30_must_pass_in_stack
161 #undef TARGET_GIMPLIFY_VA_ARG_EXPR
162 #define TARGET_GIMPLIFY_VA_ARG_EXPR fr30_gimplify_va_arg_expr
164 struct gcc_target targetm = TARGET_INITIALIZER;
166 /* Returns the number of bytes offset between FROM_REG and TO_REG
167 for the current function. As a side effect it fills in the
168 current_frame_info structure, if the data is available. */
170 fr30_compute_frame_size (int from_reg, int to_reg)
173 unsigned int return_value;
174 unsigned int var_size;
175 unsigned int args_size;
176 unsigned int pretend_size;
177 unsigned int reg_size;
180 var_size = WORD_ALIGN (get_frame_size ());
181 args_size = WORD_ALIGN (current_function_outgoing_args_size);
182 pretend_size = current_function_pretend_args_size;
187 /* Calculate space needed for registers. */
188 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno ++)
190 if (MUST_SAVE_REGISTER (regno))
192 reg_size += UNITS_PER_WORD;
197 current_frame_info.save_fp = MUST_SAVE_FRAME_POINTER;
198 current_frame_info.save_rp = MUST_SAVE_RETURN_POINTER;
200 reg_size += (current_frame_info.save_fp + current_frame_info.save_rp)
203 /* Save computed information. */
204 current_frame_info.pretend_size = pretend_size;
205 current_frame_info.var_size = var_size;
206 current_frame_info.args_size = args_size;
207 current_frame_info.reg_size = reg_size;
208 current_frame_info.frame_size = args_size + var_size;
209 current_frame_info.total_size = args_size + var_size + reg_size + pretend_size;
210 current_frame_info.gmask = gmask;
211 current_frame_info.initialised = reload_completed;
213 /* Calculate the required distance. */
216 if (to_reg == STACK_POINTER_REGNUM)
217 return_value += args_size + var_size;
219 if (from_reg == ARG_POINTER_REGNUM)
220 return_value += reg_size;
225 /* Called after register allocation to add any instructions needed for the
226 prologue. Using a prologue insn is favored compared to putting all of the
227 instructions in output_function_prologue(), since it allows the scheduler
228 to intermix instructions with the saves of the caller saved registers. In
229 some cases, it might be necessary to emit a barrier instruction as the last
230 insn to prevent such scheduling. */
233 fr30_expand_prologue (void)
238 if (! current_frame_info.initialised)
239 fr30_compute_frame_size (0, 0);
241 /* This cases shouldn't happen. Catch it now. */
242 if (current_frame_info.total_size == 0
243 && current_frame_info.gmask)
246 /* Allocate space for register arguments if this is a variadic function. */
247 if (current_frame_info.pretend_size)
249 int regs_to_save = current_frame_info.pretend_size / UNITS_PER_WORD;
251 /* Push argument registers into the pretend arg area. */
252 for (regno = FIRST_ARG_REGNUM + FR30_NUM_ARG_REGS; regno --, regs_to_save --;)
254 insn = emit_insn (gen_movsi_push (gen_rtx_REG (Pmode, regno)));
255 RTX_FRAME_RELATED_P (insn) = 1;
259 if (current_frame_info.gmask)
261 /* Save any needed call-saved regs. */
262 for (regno = STACK_POINTER_REGNUM; regno--;)
264 if ((current_frame_info.gmask & (1 << regno)) != 0)
266 insn = emit_insn (gen_movsi_push (gen_rtx_REG (Pmode, regno)));
267 RTX_FRAME_RELATED_P (insn) = 1;
272 /* Save return address if necessary. */
273 if (current_frame_info.save_rp)
275 insn = emit_insn (gen_movsi_push (gen_rtx_REG (Pmode,
276 RETURN_POINTER_REGNUM)));
277 RTX_FRAME_RELATED_P (insn) = 1;
280 /* Save old frame pointer and create new one, if necessary. */
281 if (current_frame_info.save_fp)
283 if (current_frame_info.frame_size < ((1 << 10) - UNITS_PER_WORD))
285 int enter_size = current_frame_info.frame_size + UNITS_PER_WORD;
288 insn = emit_insn (gen_enter_func (GEN_INT (enter_size)));
289 RTX_FRAME_RELATED_P (insn) = 1;
291 pattern = PATTERN (insn);
293 /* Also mark all 3 subexpressions as RTX_FRAME_RELATED_P. */
294 if (GET_CODE (pattern) == PARALLEL)
297 for (x = XVECLEN (pattern, 0); x--;)
299 rtx part = XVECEXP (pattern, 0, x);
301 /* One of the insns in the ENTER pattern updates the
302 frame pointer. If we do not actually need the frame
303 pointer in this function then this is a side effect
304 rather than a desired effect, so we do not mark that
305 insn as being related to the frame set up. Doing this
306 allows us to compile the crash66.C test file in the
308 if (! frame_pointer_needed
309 && GET_CODE (part) == SET
310 && REGNO (SET_DEST (part)) == HARD_FRAME_POINTER_REGNUM)
311 RTX_FRAME_RELATED_P (part) = 0;
313 RTX_FRAME_RELATED_P (part) = 1;
319 insn = emit_insn (gen_movsi_push (frame_pointer_rtx));
320 RTX_FRAME_RELATED_P (insn) = 1;
322 if (frame_pointer_needed)
324 insn = emit_insn (gen_movsi (frame_pointer_rtx, stack_pointer_rtx));
325 RTX_FRAME_RELATED_P (insn) = 1;
330 /* Allocate the stack frame. */
331 if (current_frame_info.frame_size == 0)
332 ; /* Nothing to do. */
333 else if (current_frame_info.save_fp
334 && current_frame_info.frame_size < ((1 << 10) - UNITS_PER_WORD))
335 ; /* Nothing to do. */
336 else if (current_frame_info.frame_size <= 512)
338 insn = emit_insn (gen_add_to_stack (GEN_INT (- current_frame_info.frame_size)));
339 RTX_FRAME_RELATED_P (insn) = 1;
343 rtx tmp = gen_rtx_REG (Pmode, PROLOGUE_TMP_REGNUM);
344 insn = emit_insn (gen_movsi (tmp, GEN_INT (current_frame_info.frame_size)));
345 RTX_FRAME_RELATED_P (insn) = 1;
346 insn = emit_insn (gen_subsi3 (stack_pointer_rtx, stack_pointer_rtx, tmp));
347 RTX_FRAME_RELATED_P (insn) = 1;
350 if (current_function_profile)
351 emit_insn (gen_blockage ());
354 /* Called after register allocation to add any instructions needed for the
355 epilogue. Using an epilogue insn is favored compared to putting all of the
356 instructions in output_function_epilogue(), since it allows the scheduler
357 to intermix instructions with the restores of the caller saved registers.
358 In some cases, it might be necessary to emit a barrier instruction as the
359 first insn to prevent such scheduling. */
361 fr30_expand_epilogue (void)
365 /* Perform the inversion operations of the prologue. */
366 if (! current_frame_info.initialised)
369 /* Pop local variables and arguments off the stack.
370 If frame_pointer_needed is TRUE then the frame pointer register
371 has actually been used as a frame pointer, and we can recover
372 the stack pointer from it, otherwise we must unwind the stack
374 if (current_frame_info.frame_size > 0)
376 if (current_frame_info.save_fp && frame_pointer_needed)
378 emit_insn (gen_leave_func ());
379 current_frame_info.save_fp = 0;
381 else if (current_frame_info.frame_size <= 508)
382 emit_insn (gen_add_to_stack
383 (GEN_INT (current_frame_info.frame_size)));
386 rtx tmp = gen_rtx_REG (Pmode, PROLOGUE_TMP_REGNUM);
387 emit_insn (gen_movsi (tmp, GEN_INT (current_frame_info.frame_size)));
388 emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, tmp));
392 if (current_frame_info.save_fp)
393 emit_insn (gen_movsi_pop (frame_pointer_rtx));
395 /* Pop all the registers that were pushed. */
396 if (current_frame_info.save_rp)
397 emit_insn (gen_movsi_pop (gen_rtx_REG (Pmode, RETURN_POINTER_REGNUM)));
399 for (regno = 0; regno < STACK_POINTER_REGNUM; regno ++)
400 if (current_frame_info.gmask & (1 << regno))
401 emit_insn (gen_movsi_pop (gen_rtx_REG (Pmode, regno)));
403 if (current_frame_info.pretend_size)
404 emit_insn (gen_add_to_stack (GEN_INT (current_frame_info.pretend_size)));
406 /* Reset state info for each function. */
407 current_frame_info = zero_frame_info;
409 emit_jump_insn (gen_return_from_func ());
412 /* Do any needed setup for a variadic function. We must create a register
413 parameter block, and then copy any anonymous arguments, plus the last
414 named argument, from registers into memory. * copying actually done in
415 fr30_expand_prologue().
417 ARG_REGS_USED_SO_FAR has *not* been updated for the last named argument
418 which has type TYPE and mode MODE, and we rely on this fact. */
420 fr30_setup_incoming_varargs (CUMULATIVE_ARGS *arg_regs_used_so_far,
421 enum machine_mode mode,
422 tree type ATTRIBUTE_UNUSED,
424 int second_time ATTRIBUTE_UNUSED)
428 /* All BLKmode values are passed by reference. */
432 /* ??? This run-time test as well as the code inside the if
433 statement is probably unnecessary. */
434 if (targetm.calls.strict_argument_naming (arg_regs_used_so_far))
435 /* If TARGET_STRICT_ARGUMENT_NAMING returns true, then the last named
436 arg must not be treated as an anonymous arg. */
437 arg_regs_used_so_far += fr30_num_arg_regs (mode, type);
439 size = FR30_NUM_ARG_REGS - (* arg_regs_used_so_far);
444 * pretend_size = (size * UNITS_PER_WORD);
448 /*{{{ Printing operands */
450 /* Print a memory address as an operand to reference that memory location. */
453 fr30_print_operand_address (FILE *stream, rtx address)
455 switch (GET_CODE (address))
458 output_addr_const (stream, address);
462 fprintf (stderr, "code = %x\n", GET_CODE (address));
464 output_operand_lossage ("fr30_print_operand_address: unhandled address");
469 /* Print an operand. */
472 fr30_print_operand (FILE *file, rtx x, int code)
479 /* Output a :D if this instruction is delayed. */
480 if (dbr_sequence_length () != 0)
485 /* Compute the register name of the second register in a hi/lo
487 if (GET_CODE (x) != REG)
488 output_operand_lossage ("fr30_print_operand: unrecognized %%p code");
490 fprintf (file, "r%d", REGNO (x) + 1);
494 /* Convert GCC's comparison operators into FR30 comparison codes. */
495 switch (GET_CODE (x))
497 case EQ: fprintf (file, "eq"); break;
498 case NE: fprintf (file, "ne"); break;
499 case LT: fprintf (file, "lt"); break;
500 case LE: fprintf (file, "le"); break;
501 case GT: fprintf (file, "gt"); break;
502 case GE: fprintf (file, "ge"); break;
503 case LTU: fprintf (file, "c"); break;
504 case LEU: fprintf (file, "ls"); break;
505 case GTU: fprintf (file, "hi"); break;
506 case GEU: fprintf (file, "nc"); break;
508 output_operand_lossage ("fr30_print_operand: unrecognized %%b code");
514 /* Convert GCC's comparison operators into the complimentary FR30
516 switch (GET_CODE (x))
518 case EQ: fprintf (file, "ne"); break;
519 case NE: fprintf (file, "eq"); break;
520 case LT: fprintf (file, "ge"); break;
521 case LE: fprintf (file, "gt"); break;
522 case GT: fprintf (file, "le"); break;
523 case GE: fprintf (file, "lt"); break;
524 case LTU: fprintf (file, "nc"); break;
525 case LEU: fprintf (file, "hi"); break;
526 case GTU: fprintf (file, "ls"); break;
527 case GEU: fprintf (file, "c"); break;
529 output_operand_lossage ("fr30_print_operand: unrecognized %%B code");
535 /* Print a signed byte value as an unsigned value. */
536 if (GET_CODE (x) != CONST_INT)
537 output_operand_lossage ("fr30_print_operand: invalid operand to %%A code");
546 fprintf (file, HOST_WIDE_INT_PRINT_DEC, val);
551 if (GET_CODE (x) != CONST_INT
554 output_operand_lossage ("fr30_print_operand: invalid %%x code");
556 fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (x) - 16);
560 if (GET_CODE (x) != CONST_DOUBLE)
561 output_operand_lossage ("fr30_print_operand: invalid %%F code");
566 real_to_decimal (str, CONST_DOUBLE_REAL_VALUE (x),
577 fprintf (stderr, "unknown code = %x\n", code);
578 output_operand_lossage ("fr30_print_operand: unknown code");
582 switch (GET_CODE (x))
585 fputs (reg_names [REGNO (x)], file);
591 switch (GET_CODE (x0))
594 if ((unsigned) REGNO (x0) >= ARRAY_SIZE (reg_names))
596 fprintf (file, "@%s", reg_names [REGNO (x0)]);
600 if (GET_CODE (XEXP (x0, 0)) != REG
601 || REGNO (XEXP (x0, 0)) < FRAME_POINTER_REGNUM
602 || REGNO (XEXP (x0, 0)) > STACK_POINTER_REGNUM
603 || GET_CODE (XEXP (x0, 1)) != CONST_INT)
605 fprintf (stderr, "bad INDEXed address:");
607 output_operand_lossage ("fr30_print_operand: unhandled MEM");
609 else if (REGNO (XEXP (x0, 0)) == FRAME_POINTER_REGNUM)
611 HOST_WIDE_INT val = INTVAL (XEXP (x0, 1));
612 if (val < -(1 << 9) || val > ((1 << 9) - 4))
614 fprintf (stderr, "frame INDEX out of range:");
616 output_operand_lossage ("fr30_print_operand: unhandled MEM");
618 fprintf (file, "@(r14, #" HOST_WIDE_INT_PRINT_DEC ")", val);
622 HOST_WIDE_INT val = INTVAL (XEXP (x0, 1));
623 if (val < 0 || val > ((1 << 6) - 4))
625 fprintf (stderr, "stack INDEX out of range:");
627 output_operand_lossage ("fr30_print_operand: unhandled MEM");
629 fprintf (file, "@(r15, #" HOST_WIDE_INT_PRINT_DEC ")", val);
638 fprintf (stderr, "bad MEM code = %x\n", GET_CODE (x0));
640 output_operand_lossage ("fr30_print_operand: unhandled MEM");
646 /* We handle SFmode constants here as output_addr_const doesn't. */
647 if (GET_MODE (x) == SFmode)
652 REAL_VALUE_FROM_CONST_DOUBLE (d, x);
653 REAL_VALUE_TO_TARGET_SINGLE (d, l);
654 fprintf (file, "0x%08lx", l);
658 /* Fall through. Let output_addr_const deal with it. */
660 output_addr_const (file, x);
668 /*{{{ Function arguments */
670 /* Return true if we should pass an argument on the stack rather than
674 fr30_must_pass_in_stack (enum machine_mode mode, tree type)
680 return AGGREGATE_TYPE_P (type);
683 /* Compute the number of word sized registers needed to hold a
684 function argument of mode INT_MODE and tree type TYPE. */
686 fr30_num_arg_regs (enum machine_mode mode, tree type)
690 if (targetm.calls.must_pass_in_stack (mode, type))
693 if (type && mode == BLKmode)
694 size = int_size_in_bytes (type);
696 size = GET_MODE_SIZE (mode);
698 return (size + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
701 /* Implements the FUNCTION_ARG_PARTIAL_NREGS macro.
702 Returns the number of argument registers required to hold *part* of
703 a parameter of machine mode MODE and tree type TYPE (which may be
704 NULL if the type is not known). If the argument fits entirely in
705 the argument registers, or entirely on the stack, then 0 is returned.
706 CUM is the number of argument registers already used by earlier
707 parameters to the function. */
710 fr30_function_arg_partial_nregs (CUMULATIVE_ARGS cum, enum machine_mode mode,
711 tree type, int named)
713 /* Unnamed arguments, ie those that are prototyped as ...
714 are always passed on the stack.
715 Also check here to see if all the argument registers are full. */
716 if (named == 0 || cum >= FR30_NUM_ARG_REGS)
719 /* Work out how many argument registers would be needed if this
720 parameter were to be passed entirely in registers. If there
721 are sufficient argument registers available (or if no registers
722 are needed because the parameter must be passed on the stack)
723 then return zero, as this parameter does not require partial
724 register, partial stack stack space. */
725 if (cum + fr30_num_arg_regs (mode, type) <= FR30_NUM_ARG_REGS)
728 /* Otherwise return the number of registers that would be used. */
729 return FR30_NUM_ARG_REGS - cum;
732 /* Implement `va_arg'. */
735 fr30_gimplify_va_arg_expr (tree valist, tree type, tree *pre_p, tree *post_p)
737 if (FUNCTION_ARG_PASS_BY_REFERENCE (dummy, TYPE_MODE (type), type, dummy))
738 return ind_gimplify_va_arg_expr (valist, type, pre_p, post_p);
740 return std_gimplify_va_arg_expr (valist, type, pre_p, post_p);
744 /*{{{ Operand predicates */
747 #define Mmode enum machine_mode
750 /* Returns true if OPERAND is an integer value suitable for use in
751 an ADDSP instruction. */
753 stack_add_operand (rtx operand, Mmode mode ATTRIBUTE_UNUSED)
756 (GET_CODE (operand) == CONST_INT
757 && INTVAL (operand) >= -512
758 && INTVAL (operand) <= 508
759 && ((INTVAL (operand) & 3) == 0));
762 /* Returns true if OPERAND is an integer value suitable for use in
763 an ADD por ADD2 instruction, or if it is a register. */
765 add_immediate_operand (rtx operand, Mmode mode ATTRIBUTE_UNUSED)
768 (GET_CODE (operand) == REG
769 || (GET_CODE (operand) == CONST_INT
770 && INTVAL (operand) >= -16
771 && INTVAL (operand) <= 15));
774 /* Returns true if OPERAND is hard register in the range 8 - 15. */
776 high_register_operand (rtx operand, Mmode mode ATTRIBUTE_UNUSED)
779 (GET_CODE (operand) == REG
780 && REGNO (operand) <= 15
781 && REGNO (operand) >= 8);
784 /* Returns true if OPERAND is hard register in the range 0 - 7. */
786 low_register_operand (rtx operand, Mmode mode ATTRIBUTE_UNUSED)
789 (GET_CODE (operand) == REG
790 && REGNO (operand) <= 7);
793 /* Returns true if OPERAND is suitable for use in a CALL insn. */
795 call_operand (rtx operand, Mmode mode ATTRIBUTE_UNUSED)
797 return (GET_CODE (operand) == MEM
798 && (GET_CODE (XEXP (operand, 0)) == SYMBOL_REF
799 || GET_CODE (XEXP (operand, 0)) == REG));
802 /* Returns TRUE if OP is a valid operand of a DImode operation. */
804 di_operand (rtx op, Mmode mode)
806 if (register_operand (op, mode))
809 if (mode != VOIDmode && GET_MODE (op) != VOIDmode && GET_MODE (op) != DImode)
812 if (GET_CODE (op) == SUBREG)
813 op = SUBREG_REG (op);
815 switch (GET_CODE (op))
822 return memory_address_p (DImode, XEXP (op, 0));
829 /* Returns TRUE if OP is a DImode register or MEM. */
831 nonimmediate_di_operand (rtx op, Mmode mode)
833 if (register_operand (op, mode))
836 if (mode != VOIDmode && GET_MODE (op) != VOIDmode && GET_MODE (op) != DImode)
839 if (GET_CODE (op) == SUBREG)
840 op = SUBREG_REG (op);
842 if (GET_CODE (op) == MEM)
843 return memory_address_p (DImode, XEXP (op, 0));
848 /* Returns true iff all the registers in the operands array
849 are in descending or ascending order. */
851 fr30_check_multiple_regs (rtx *operands, int num_operands, int descending)
855 unsigned int prev_regno = 0;
857 while (num_operands --)
859 if (GET_CODE (operands [num_operands]) != REG)
862 if (REGNO (operands [num_operands]) < prev_regno)
865 prev_regno = REGNO (operands [num_operands]);
870 unsigned int prev_regno = CONDITION_CODE_REGNUM;
872 while (num_operands --)
874 if (GET_CODE (operands [num_operands]) != REG)
877 if (REGNO (operands [num_operands]) > prev_regno)
880 prev_regno = REGNO (operands [num_operands]);
888 fr30_const_double_is_zero (rtx operand)
892 if (operand == NULL || GET_CODE (operand) != CONST_DOUBLE)
895 REAL_VALUE_FROM_CONST_DOUBLE (d, operand);
897 return REAL_VALUES_EQUAL (d, dconst0);
901 /*{{{ Instruction Output Routines */
903 /* Output a double word move.
904 It must be REG<-REG, REG<-MEM, MEM<-REG or REG<-CONST.
905 On the FR30 we are constrained by the fact that it does not
906 support offsetable addresses, and so we have to load the
907 address of the secnd word into the second destination register
908 before we can use it. */
911 fr30_move_double (rtx * operands)
913 rtx src = operands[1];
914 rtx dest = operands[0];
915 enum rtx_code src_code = GET_CODE (src);
916 enum rtx_code dest_code = GET_CODE (dest);
917 enum machine_mode mode = GET_MODE (dest);
922 if (dest_code == REG)
926 int reverse = (REGNO (dest) == REGNO (src) + 1);
928 /* We normally copy the low-numbered register first. However, if
929 the first register of operand 0 is the same as the second register
930 of operand 1, we must copy in the opposite order. */
931 emit_insn (gen_rtx_SET (VOIDmode,
932 operand_subword (dest, reverse, TRUE, mode),
933 operand_subword (src, reverse, TRUE, mode)));
935 emit_insn (gen_rtx_SET (VOIDmode,
936 operand_subword (dest, !reverse, TRUE, mode),
937 operand_subword (src, !reverse, TRUE, mode)));
939 else if (src_code == MEM)
941 rtx addr = XEXP (src, 0);
942 int dregno = REGNO (dest);
947 /* If the high-address word is used in the address, we
948 must load it last. Otherwise, load it first. */
949 int reverse = (refers_to_regno_p (dregno, dregno + 1, addr, 0) != 0);
951 if (GET_CODE (addr) != REG)
954 dest0 = operand_subword (dest, reverse, TRUE, mode);
955 dest1 = operand_subword (dest, !reverse, TRUE, mode);
959 emit_insn (gen_rtx_SET (VOIDmode, dest1,
960 adjust_address (src, SImode, 0)));
961 emit_insn (gen_rtx_SET (SImode, dest0,
962 gen_rtx_REG (SImode, REGNO (addr))));
963 emit_insn (gen_rtx_SET (SImode, dest0,
964 plus_constant (dest0, UNITS_PER_WORD)));
966 new_mem = gen_rtx_MEM (SImode, dest0);
967 MEM_COPY_ATTRIBUTES (new_mem, src);
969 emit_insn (gen_rtx_SET (VOIDmode, dest0, new_mem));
973 emit_insn (gen_rtx_SET (VOIDmode, dest0,
974 adjust_address (src, SImode, 0)));
975 emit_insn (gen_rtx_SET (SImode, dest1,
976 gen_rtx_REG (SImode, REGNO (addr))));
977 emit_insn (gen_rtx_SET (SImode, dest1,
978 plus_constant (dest1, UNITS_PER_WORD)));
980 new_mem = gen_rtx_MEM (SImode, dest1);
981 MEM_COPY_ATTRIBUTES (new_mem, src);
983 emit_insn (gen_rtx_SET (VOIDmode, dest1, new_mem));
986 else if (src_code == CONST_INT || src_code == CONST_DOUBLE)
989 split_double (src, &words[0], &words[1]);
990 emit_insn (gen_rtx_SET (VOIDmode,
991 operand_subword (dest, 0, TRUE, mode),
994 emit_insn (gen_rtx_SET (VOIDmode,
995 operand_subword (dest, 1, TRUE, mode),
999 else if (src_code == REG && dest_code == MEM)
1001 rtx addr = XEXP (dest, 0);
1005 if (GET_CODE (addr) != REG)
1008 src0 = operand_subword (src, 0, TRUE, mode);
1009 src1 = operand_subword (src, 1, TRUE, mode);
1011 emit_insn (gen_rtx_SET (VOIDmode, adjust_address (dest, SImode, 0),
1014 if (REGNO (addr) == STACK_POINTER_REGNUM
1015 || REGNO (addr) == FRAME_POINTER_REGNUM)
1016 emit_insn (gen_rtx_SET (VOIDmode,
1017 adjust_address (dest, SImode, UNITS_PER_WORD),
1023 /* We need a scratch register to hold the value of 'address + 4'.
1024 We ought to allow gcc to find one for us, but for now, just
1025 push one of the source registers. */
1026 emit_insn (gen_movsi_push (src0));
1027 emit_insn (gen_movsi_internal (src0, addr));
1028 emit_insn (gen_addsi_small_int (src0, src0, GEN_INT (UNITS_PER_WORD)));
1030 new_mem = gen_rtx_MEM (SImode, src0);
1031 MEM_COPY_ATTRIBUTES (new_mem, dest);
1033 emit_insn (gen_rtx_SET (VOIDmode, new_mem, src1));
1034 emit_insn (gen_movsi_pop (src0));
1038 /* This should have been prevented by the constraints on movdi_insn. */
1047 /* Local Variables: */
1048 /* folded-file: t */