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 bool fr30_must_pass_in_stack (enum machine_mode, tree);
127 static int fr30_arg_partial_bytes (CUMULATIVE_ARGS *, enum machine_mode,
131 #define FRAME_POINTER_MASK (1 << (FRAME_POINTER_REGNUM))
132 #define RETURN_POINTER_MASK (1 << (RETURN_POINTER_REGNUM))
134 /* Tell prologue and epilogue if register REGNO should be saved / restored.
135 The return address and frame pointer are treated separately.
136 Don't consider them here. */
137 #define MUST_SAVE_REGISTER(regno) \
138 ( (regno) != RETURN_POINTER_REGNUM \
139 && (regno) != FRAME_POINTER_REGNUM \
140 && regs_ever_live [regno] \
141 && ! call_used_regs [regno] )
143 #define MUST_SAVE_FRAME_POINTER (regs_ever_live [FRAME_POINTER_REGNUM] || frame_pointer_needed)
144 #define MUST_SAVE_RETURN_POINTER (regs_ever_live [RETURN_POINTER_REGNUM] || current_function_profile)
146 #if UNITS_PER_WORD == 4
147 #define WORD_ALIGN(SIZE) (((SIZE) + 3) & ~3)
150 /* Initialize the GCC target structure. */
151 #undef TARGET_ASM_ALIGNED_HI_OP
152 #define TARGET_ASM_ALIGNED_HI_OP "\t.hword\t"
153 #undef TARGET_ASM_ALIGNED_SI_OP
154 #define TARGET_ASM_ALIGNED_SI_OP "\t.word\t"
156 #undef TARGET_PROMOTE_PROTOTYPES
157 #define TARGET_PROMOTE_PROTOTYPES hook_bool_tree_true
158 #undef TARGET_PASS_BY_REFERENCE
159 #define TARGET_PASS_BY_REFERENCE hook_pass_by_reference_must_pass_in_stack
160 #undef TARGET_ARG_PARTIAL_BYTES
161 #define TARGET_ARG_PARTIAL_BYTES fr30_arg_partial_bytes
163 #undef TARGET_SETUP_INCOMING_VARARGS
164 #define TARGET_SETUP_INCOMING_VARARGS fr30_setup_incoming_varargs
165 #undef TARGET_MUST_PASS_IN_STACK
166 #define TARGET_MUST_PASS_IN_STACK fr30_must_pass_in_stack
168 struct gcc_target targetm = TARGET_INITIALIZER;
170 /* Returns the number of bytes offset between FROM_REG and TO_REG
171 for the current function. As a side effect it fills in the
172 current_frame_info structure, if the data is available. */
174 fr30_compute_frame_size (int from_reg, int to_reg)
177 unsigned int return_value;
178 unsigned int var_size;
179 unsigned int args_size;
180 unsigned int pretend_size;
181 unsigned int reg_size;
184 var_size = WORD_ALIGN (get_frame_size ());
185 args_size = WORD_ALIGN (current_function_outgoing_args_size);
186 pretend_size = current_function_pretend_args_size;
191 /* Calculate space needed for registers. */
192 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno ++)
194 if (MUST_SAVE_REGISTER (regno))
196 reg_size += UNITS_PER_WORD;
201 current_frame_info.save_fp = MUST_SAVE_FRAME_POINTER;
202 current_frame_info.save_rp = MUST_SAVE_RETURN_POINTER;
204 reg_size += (current_frame_info.save_fp + current_frame_info.save_rp)
207 /* Save computed information. */
208 current_frame_info.pretend_size = pretend_size;
209 current_frame_info.var_size = var_size;
210 current_frame_info.args_size = args_size;
211 current_frame_info.reg_size = reg_size;
212 current_frame_info.frame_size = args_size + var_size;
213 current_frame_info.total_size = args_size + var_size + reg_size + pretend_size;
214 current_frame_info.gmask = gmask;
215 current_frame_info.initialised = reload_completed;
217 /* Calculate the required distance. */
220 if (to_reg == STACK_POINTER_REGNUM)
221 return_value += args_size + var_size;
223 if (from_reg == ARG_POINTER_REGNUM)
224 return_value += reg_size;
229 /* Called after register allocation to add any instructions needed for the
230 prologue. Using a prologue insn is favored compared to putting all of the
231 instructions in output_function_prologue(), since it allows the scheduler
232 to intermix instructions with the saves of the caller saved registers. In
233 some cases, it might be necessary to emit a barrier instruction as the last
234 insn to prevent such scheduling. */
237 fr30_expand_prologue (void)
242 if (! current_frame_info.initialised)
243 fr30_compute_frame_size (0, 0);
245 /* This cases shouldn't happen. Catch it now. */
246 if (current_frame_info.total_size == 0
247 && current_frame_info.gmask)
250 /* Allocate space for register arguments if this is a variadic function. */
251 if (current_frame_info.pretend_size)
253 int regs_to_save = current_frame_info.pretend_size / UNITS_PER_WORD;
255 /* Push argument registers into the pretend arg area. */
256 for (regno = FIRST_ARG_REGNUM + FR30_NUM_ARG_REGS; regno --, regs_to_save --;)
258 insn = emit_insn (gen_movsi_push (gen_rtx_REG (Pmode, regno)));
259 RTX_FRAME_RELATED_P (insn) = 1;
263 if (current_frame_info.gmask)
265 /* Save any needed call-saved regs. */
266 for (regno = STACK_POINTER_REGNUM; regno--;)
268 if ((current_frame_info.gmask & (1 << regno)) != 0)
270 insn = emit_insn (gen_movsi_push (gen_rtx_REG (Pmode, regno)));
271 RTX_FRAME_RELATED_P (insn) = 1;
276 /* Save return address if necessary. */
277 if (current_frame_info.save_rp)
279 insn = emit_insn (gen_movsi_push (gen_rtx_REG (Pmode,
280 RETURN_POINTER_REGNUM)));
281 RTX_FRAME_RELATED_P (insn) = 1;
284 /* Save old frame pointer and create new one, if necessary. */
285 if (current_frame_info.save_fp)
287 if (current_frame_info.frame_size < ((1 << 10) - UNITS_PER_WORD))
289 int enter_size = current_frame_info.frame_size + UNITS_PER_WORD;
292 insn = emit_insn (gen_enter_func (GEN_INT (enter_size)));
293 RTX_FRAME_RELATED_P (insn) = 1;
295 pattern = PATTERN (insn);
297 /* Also mark all 3 subexpressions as RTX_FRAME_RELATED_P. */
298 if (GET_CODE (pattern) == PARALLEL)
301 for (x = XVECLEN (pattern, 0); x--;)
303 rtx part = XVECEXP (pattern, 0, x);
305 /* One of the insns in the ENTER pattern updates the
306 frame pointer. If we do not actually need the frame
307 pointer in this function then this is a side effect
308 rather than a desired effect, so we do not mark that
309 insn as being related to the frame set up. Doing this
310 allows us to compile the crash66.C test file in the
312 if (! frame_pointer_needed
313 && GET_CODE (part) == SET
314 && REGNO (SET_DEST (part)) == HARD_FRAME_POINTER_REGNUM)
315 RTX_FRAME_RELATED_P (part) = 0;
317 RTX_FRAME_RELATED_P (part) = 1;
323 insn = emit_insn (gen_movsi_push (frame_pointer_rtx));
324 RTX_FRAME_RELATED_P (insn) = 1;
326 if (frame_pointer_needed)
328 insn = emit_insn (gen_movsi (frame_pointer_rtx, stack_pointer_rtx));
329 RTX_FRAME_RELATED_P (insn) = 1;
334 /* Allocate the stack frame. */
335 if (current_frame_info.frame_size == 0)
336 ; /* Nothing to do. */
337 else if (current_frame_info.save_fp
338 && current_frame_info.frame_size < ((1 << 10) - UNITS_PER_WORD))
339 ; /* Nothing to do. */
340 else if (current_frame_info.frame_size <= 512)
342 insn = emit_insn (gen_add_to_stack (GEN_INT (- current_frame_info.frame_size)));
343 RTX_FRAME_RELATED_P (insn) = 1;
347 rtx tmp = gen_rtx_REG (Pmode, PROLOGUE_TMP_REGNUM);
348 insn = emit_insn (gen_movsi (tmp, GEN_INT (current_frame_info.frame_size)));
349 RTX_FRAME_RELATED_P (insn) = 1;
350 insn = emit_insn (gen_subsi3 (stack_pointer_rtx, stack_pointer_rtx, tmp));
351 RTX_FRAME_RELATED_P (insn) = 1;
354 if (current_function_profile)
355 emit_insn (gen_blockage ());
358 /* Called after register allocation to add any instructions needed for the
359 epilogue. Using an epilogue insn is favored compared to putting all of the
360 instructions in output_function_epilogue(), since it allows the scheduler
361 to intermix instructions with the restores of the caller saved registers.
362 In some cases, it might be necessary to emit a barrier instruction as the
363 first insn to prevent such scheduling. */
365 fr30_expand_epilogue (void)
369 /* Perform the inversion operations of the prologue. */
370 if (! current_frame_info.initialised)
373 /* Pop local variables and arguments off the stack.
374 If frame_pointer_needed is TRUE then the frame pointer register
375 has actually been used as a frame pointer, and we can recover
376 the stack pointer from it, otherwise we must unwind the stack
378 if (current_frame_info.frame_size > 0)
380 if (current_frame_info.save_fp && frame_pointer_needed)
382 emit_insn (gen_leave_func ());
383 current_frame_info.save_fp = 0;
385 else if (current_frame_info.frame_size <= 508)
386 emit_insn (gen_add_to_stack
387 (GEN_INT (current_frame_info.frame_size)));
390 rtx tmp = gen_rtx_REG (Pmode, PROLOGUE_TMP_REGNUM);
391 emit_insn (gen_movsi (tmp, GEN_INT (current_frame_info.frame_size)));
392 emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, tmp));
396 if (current_frame_info.save_fp)
397 emit_insn (gen_movsi_pop (frame_pointer_rtx));
399 /* Pop all the registers that were pushed. */
400 if (current_frame_info.save_rp)
401 emit_insn (gen_movsi_pop (gen_rtx_REG (Pmode, RETURN_POINTER_REGNUM)));
403 for (regno = 0; regno < STACK_POINTER_REGNUM; regno ++)
404 if (current_frame_info.gmask & (1 << regno))
405 emit_insn (gen_movsi_pop (gen_rtx_REG (Pmode, regno)));
407 if (current_frame_info.pretend_size)
408 emit_insn (gen_add_to_stack (GEN_INT (current_frame_info.pretend_size)));
410 /* Reset state info for each function. */
411 current_frame_info = zero_frame_info;
413 emit_jump_insn (gen_return_from_func ());
416 /* Do any needed setup for a variadic function. We must create a register
417 parameter block, and then copy any anonymous arguments, plus the last
418 named argument, from registers into memory. * copying actually done in
419 fr30_expand_prologue().
421 ARG_REGS_USED_SO_FAR has *not* been updated for the last named argument
422 which has type TYPE and mode MODE, and we rely on this fact. */
424 fr30_setup_incoming_varargs (CUMULATIVE_ARGS *arg_regs_used_so_far,
425 enum machine_mode mode,
426 tree type ATTRIBUTE_UNUSED,
428 int second_time ATTRIBUTE_UNUSED)
432 /* All BLKmode values are passed by reference. */
436 /* ??? This run-time test as well as the code inside the if
437 statement is probably unnecessary. */
438 if (targetm.calls.strict_argument_naming (arg_regs_used_so_far))
439 /* If TARGET_STRICT_ARGUMENT_NAMING returns true, then the last named
440 arg must not be treated as an anonymous arg. */
441 arg_regs_used_so_far += fr30_num_arg_regs (mode, type);
443 size = FR30_NUM_ARG_REGS - (* arg_regs_used_so_far);
448 * pretend_size = (size * UNITS_PER_WORD);
452 /*{{{ Printing operands */
454 /* Print a memory address as an operand to reference that memory location. */
457 fr30_print_operand_address (FILE *stream, rtx address)
459 switch (GET_CODE (address))
462 output_addr_const (stream, address);
466 fprintf (stderr, "code = %x\n", GET_CODE (address));
468 output_operand_lossage ("fr30_print_operand_address: unhandled address");
473 /* Print an operand. */
476 fr30_print_operand (FILE *file, rtx x, int code)
483 /* Output a :D if this instruction is delayed. */
484 if (dbr_sequence_length () != 0)
489 /* Compute the register name of the second register in a hi/lo
491 if (GET_CODE (x) != REG)
492 output_operand_lossage ("fr30_print_operand: unrecognized %%p code");
494 fprintf (file, "r%d", REGNO (x) + 1);
498 /* Convert GCC's comparison operators into FR30 comparison codes. */
499 switch (GET_CODE (x))
501 case EQ: fprintf (file, "eq"); break;
502 case NE: fprintf (file, "ne"); break;
503 case LT: fprintf (file, "lt"); break;
504 case LE: fprintf (file, "le"); break;
505 case GT: fprintf (file, "gt"); break;
506 case GE: fprintf (file, "ge"); break;
507 case LTU: fprintf (file, "c"); break;
508 case LEU: fprintf (file, "ls"); break;
509 case GTU: fprintf (file, "hi"); break;
510 case GEU: fprintf (file, "nc"); break;
512 output_operand_lossage ("fr30_print_operand: unrecognized %%b code");
518 /* Convert GCC's comparison operators into the complimentary FR30
520 switch (GET_CODE (x))
522 case EQ: fprintf (file, "ne"); break;
523 case NE: fprintf (file, "eq"); break;
524 case LT: fprintf (file, "ge"); break;
525 case LE: fprintf (file, "gt"); break;
526 case GT: fprintf (file, "le"); break;
527 case GE: fprintf (file, "lt"); break;
528 case LTU: fprintf (file, "nc"); break;
529 case LEU: fprintf (file, "hi"); break;
530 case GTU: fprintf (file, "ls"); break;
531 case GEU: fprintf (file, "c"); break;
533 output_operand_lossage ("fr30_print_operand: unrecognized %%B code");
539 /* Print a signed byte value as an unsigned value. */
540 if (GET_CODE (x) != CONST_INT)
541 output_operand_lossage ("fr30_print_operand: invalid operand to %%A code");
550 fprintf (file, HOST_WIDE_INT_PRINT_DEC, val);
555 if (GET_CODE (x) != CONST_INT
558 output_operand_lossage ("fr30_print_operand: invalid %%x code");
560 fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (x) - 16);
564 if (GET_CODE (x) != CONST_DOUBLE)
565 output_operand_lossage ("fr30_print_operand: invalid %%F code");
570 real_to_decimal (str, CONST_DOUBLE_REAL_VALUE (x),
581 fprintf (stderr, "unknown code = %x\n", code);
582 output_operand_lossage ("fr30_print_operand: unknown code");
586 switch (GET_CODE (x))
589 fputs (reg_names [REGNO (x)], file);
595 switch (GET_CODE (x0))
598 if ((unsigned) REGNO (x0) >= ARRAY_SIZE (reg_names))
600 fprintf (file, "@%s", reg_names [REGNO (x0)]);
604 if (GET_CODE (XEXP (x0, 0)) != REG
605 || REGNO (XEXP (x0, 0)) < FRAME_POINTER_REGNUM
606 || REGNO (XEXP (x0, 0)) > STACK_POINTER_REGNUM
607 || GET_CODE (XEXP (x0, 1)) != CONST_INT)
609 fprintf (stderr, "bad INDEXed address:");
611 output_operand_lossage ("fr30_print_operand: unhandled MEM");
613 else if (REGNO (XEXP (x0, 0)) == FRAME_POINTER_REGNUM)
615 HOST_WIDE_INT val = INTVAL (XEXP (x0, 1));
616 if (val < -(1 << 9) || val > ((1 << 9) - 4))
618 fprintf (stderr, "frame INDEX out of range:");
620 output_operand_lossage ("fr30_print_operand: unhandled MEM");
622 fprintf (file, "@(r14, #" HOST_WIDE_INT_PRINT_DEC ")", val);
626 HOST_WIDE_INT val = INTVAL (XEXP (x0, 1));
627 if (val < 0 || val > ((1 << 6) - 4))
629 fprintf (stderr, "stack INDEX out of range:");
631 output_operand_lossage ("fr30_print_operand: unhandled MEM");
633 fprintf (file, "@(r15, #" HOST_WIDE_INT_PRINT_DEC ")", val);
642 fprintf (stderr, "bad MEM code = %x\n", GET_CODE (x0));
644 output_operand_lossage ("fr30_print_operand: unhandled MEM");
650 /* We handle SFmode constants here as output_addr_const doesn't. */
651 if (GET_MODE (x) == SFmode)
656 REAL_VALUE_FROM_CONST_DOUBLE (d, x);
657 REAL_VALUE_TO_TARGET_SINGLE (d, l);
658 fprintf (file, "0x%08lx", l);
662 /* Fall through. Let output_addr_const deal with it. */
664 output_addr_const (file, x);
672 /*{{{ Function arguments */
674 /* Return true if we should pass an argument on the stack rather than
678 fr30_must_pass_in_stack (enum machine_mode mode, tree type)
684 return AGGREGATE_TYPE_P (type);
687 /* Compute the number of word sized registers needed to hold a
688 function argument of mode INT_MODE and tree type TYPE. */
690 fr30_num_arg_regs (enum machine_mode mode, tree type)
694 if (targetm.calls.must_pass_in_stack (mode, type))
697 if (type && mode == BLKmode)
698 size = int_size_in_bytes (type);
700 size = GET_MODE_SIZE (mode);
702 return (size + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
705 /* Returns the number of bytes in which *part* of a parameter of machine
706 mode MODE and tree type TYPE (which may be NULL if the type is not known).
707 If the argument fits entirely in the argument registers, or entirely on
708 the stack, then 0 is returned.
709 CUM is the number of argument registers already used by earlier
710 parameters to the function. */
713 fr30_arg_partial_bytes (CUMULATIVE_ARGS *cum, enum machine_mode mode,
714 tree type, bool named)
716 /* Unnamed arguments, i.e. those that are prototyped as ...
717 are always passed on the stack.
718 Also check here to see if all the argument registers are full. */
719 if (named == 0 || *cum >= FR30_NUM_ARG_REGS)
722 /* Work out how many argument registers would be needed if this
723 parameter were to be passed entirely in registers. If there
724 are sufficient argument registers available (or if no registers
725 are needed because the parameter must be passed on the stack)
726 then return zero, as this parameter does not require partial
727 register, partial stack stack space. */
728 if (*cum + fr30_num_arg_regs (mode, type) <= FR30_NUM_ARG_REGS)
731 return (FR30_NUM_ARG_REGS - *cum) * UNITS_PER_WORD;
735 /*{{{ Operand predicates */
738 #define Mmode enum machine_mode
741 /* Returns true if OPERAND is an integer value suitable for use in
742 an ADDSP instruction. */
744 stack_add_operand (rtx operand, Mmode mode ATTRIBUTE_UNUSED)
747 (GET_CODE (operand) == CONST_INT
748 && INTVAL (operand) >= -512
749 && INTVAL (operand) <= 508
750 && ((INTVAL (operand) & 3) == 0));
753 /* Returns true if OPERAND is an integer value suitable for use in
754 an ADD por ADD2 instruction, or if it is a register. */
756 add_immediate_operand (rtx operand, Mmode mode ATTRIBUTE_UNUSED)
759 (GET_CODE (operand) == REG
760 || (GET_CODE (operand) == CONST_INT
761 && INTVAL (operand) >= -16
762 && INTVAL (operand) <= 15));
765 /* Returns true if OPERAND is hard register in the range 8 - 15. */
767 high_register_operand (rtx operand, Mmode mode ATTRIBUTE_UNUSED)
770 (GET_CODE (operand) == REG
771 && REGNO (operand) <= 15
772 && REGNO (operand) >= 8);
775 /* Returns true if OPERAND is hard register in the range 0 - 7. */
777 low_register_operand (rtx operand, Mmode mode ATTRIBUTE_UNUSED)
780 (GET_CODE (operand) == REG
781 && REGNO (operand) <= 7);
784 /* Returns true if OPERAND is suitable for use in a CALL insn. */
786 call_operand (rtx operand, Mmode mode ATTRIBUTE_UNUSED)
788 return (GET_CODE (operand) == MEM
789 && (GET_CODE (XEXP (operand, 0)) == SYMBOL_REF
790 || GET_CODE (XEXP (operand, 0)) == REG));
793 /* Returns TRUE if OP is a valid operand of a DImode operation. */
795 di_operand (rtx op, Mmode mode)
797 if (register_operand (op, mode))
800 if (mode != VOIDmode && GET_MODE (op) != VOIDmode && GET_MODE (op) != DImode)
803 if (GET_CODE (op) == SUBREG)
804 op = SUBREG_REG (op);
806 switch (GET_CODE (op))
813 return memory_address_p (DImode, XEXP (op, 0));
820 /* Returns TRUE if OP is a DImode register or MEM. */
822 nonimmediate_di_operand (rtx op, Mmode mode)
824 if (register_operand (op, mode))
827 if (mode != VOIDmode && GET_MODE (op) != VOIDmode && GET_MODE (op) != DImode)
830 if (GET_CODE (op) == SUBREG)
831 op = SUBREG_REG (op);
833 if (GET_CODE (op) == MEM)
834 return memory_address_p (DImode, XEXP (op, 0));
839 /* Returns true iff all the registers in the operands array
840 are in descending or ascending order. */
842 fr30_check_multiple_regs (rtx *operands, int num_operands, int descending)
846 unsigned int prev_regno = 0;
848 while (num_operands --)
850 if (GET_CODE (operands [num_operands]) != REG)
853 if (REGNO (operands [num_operands]) < prev_regno)
856 prev_regno = REGNO (operands [num_operands]);
861 unsigned int prev_regno = CONDITION_CODE_REGNUM;
863 while (num_operands --)
865 if (GET_CODE (operands [num_operands]) != REG)
868 if (REGNO (operands [num_operands]) > prev_regno)
871 prev_regno = REGNO (operands [num_operands]);
879 fr30_const_double_is_zero (rtx operand)
883 if (operand == NULL || GET_CODE (operand) != CONST_DOUBLE)
886 REAL_VALUE_FROM_CONST_DOUBLE (d, operand);
888 return REAL_VALUES_EQUAL (d, dconst0);
892 /*{{{ Instruction Output Routines */
894 /* Output a double word move.
895 It must be REG<-REG, REG<-MEM, MEM<-REG or REG<-CONST.
896 On the FR30 we are constrained by the fact that it does not
897 support offsetable addresses, and so we have to load the
898 address of the secnd word into the second destination register
899 before we can use it. */
902 fr30_move_double (rtx * operands)
904 rtx src = operands[1];
905 rtx dest = operands[0];
906 enum rtx_code src_code = GET_CODE (src);
907 enum rtx_code dest_code = GET_CODE (dest);
908 enum machine_mode mode = GET_MODE (dest);
913 if (dest_code == REG)
917 int reverse = (REGNO (dest) == REGNO (src) + 1);
919 /* We normally copy the low-numbered register first. However, if
920 the first register of operand 0 is the same as the second register
921 of operand 1, we must copy in the opposite order. */
922 emit_insn (gen_rtx_SET (VOIDmode,
923 operand_subword (dest, reverse, TRUE, mode),
924 operand_subword (src, reverse, TRUE, mode)));
926 emit_insn (gen_rtx_SET (VOIDmode,
927 operand_subword (dest, !reverse, TRUE, mode),
928 operand_subword (src, !reverse, TRUE, mode)));
930 else if (src_code == MEM)
932 rtx addr = XEXP (src, 0);
933 int dregno = REGNO (dest);
938 /* If the high-address word is used in the address, we
939 must load it last. Otherwise, load it first. */
940 int reverse = (refers_to_regno_p (dregno, dregno + 1, addr, 0) != 0);
942 if (GET_CODE (addr) != REG)
945 dest0 = operand_subword (dest, reverse, TRUE, mode);
946 dest1 = operand_subword (dest, !reverse, TRUE, mode);
950 emit_insn (gen_rtx_SET (VOIDmode, dest1,
951 adjust_address (src, SImode, 0)));
952 emit_insn (gen_rtx_SET (SImode, dest0,
953 gen_rtx_REG (SImode, REGNO (addr))));
954 emit_insn (gen_rtx_SET (SImode, dest0,
955 plus_constant (dest0, UNITS_PER_WORD)));
957 new_mem = gen_rtx_MEM (SImode, dest0);
958 MEM_COPY_ATTRIBUTES (new_mem, src);
960 emit_insn (gen_rtx_SET (VOIDmode, dest0, new_mem));
964 emit_insn (gen_rtx_SET (VOIDmode, dest0,
965 adjust_address (src, SImode, 0)));
966 emit_insn (gen_rtx_SET (SImode, dest1,
967 gen_rtx_REG (SImode, REGNO (addr))));
968 emit_insn (gen_rtx_SET (SImode, dest1,
969 plus_constant (dest1, UNITS_PER_WORD)));
971 new_mem = gen_rtx_MEM (SImode, dest1);
972 MEM_COPY_ATTRIBUTES (new_mem, src);
974 emit_insn (gen_rtx_SET (VOIDmode, dest1, new_mem));
977 else if (src_code == CONST_INT || src_code == CONST_DOUBLE)
980 split_double (src, &words[0], &words[1]);
981 emit_insn (gen_rtx_SET (VOIDmode,
982 operand_subword (dest, 0, TRUE, mode),
985 emit_insn (gen_rtx_SET (VOIDmode,
986 operand_subword (dest, 1, TRUE, mode),
990 else if (src_code == REG && dest_code == MEM)
992 rtx addr = XEXP (dest, 0);
996 if (GET_CODE (addr) != REG)
999 src0 = operand_subword (src, 0, TRUE, mode);
1000 src1 = operand_subword (src, 1, TRUE, mode);
1002 emit_insn (gen_rtx_SET (VOIDmode, adjust_address (dest, SImode, 0),
1005 if (REGNO (addr) == STACK_POINTER_REGNUM
1006 || REGNO (addr) == FRAME_POINTER_REGNUM)
1007 emit_insn (gen_rtx_SET (VOIDmode,
1008 adjust_address (dest, SImode, UNITS_PER_WORD),
1014 /* We need a scratch register to hold the value of 'address + 4'.
1015 We ought to allow gcc to find one for us, but for now, just
1016 push one of the source registers. */
1017 emit_insn (gen_movsi_push (src0));
1018 emit_insn (gen_movsi_internal (src0, addr));
1019 emit_insn (gen_addsi_small_int (src0, src0, GEN_INT (UNITS_PER_WORD)));
1021 new_mem = gen_rtx_MEM (SImode, src0);
1022 MEM_COPY_ATTRIBUTES (new_mem, dest);
1024 emit_insn (gen_rtx_SET (VOIDmode, new_mem, src1));
1025 emit_insn (gen_movsi_pop (src0));
1029 /* This should have been prevented by the constraints on movdi_insn. */
1038 /* Local Variables: */
1039 /* folded-file: t */