1 /* FR30 specific functions.
2 Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
3 Contributed by Cygnus Solutions.
5 This file is part of GNU CC.
7 GNU CC 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 GNU CC 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 GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
28 #include "hard-reg-set.h"
30 #include "insn-config.h"
31 #include "conditions.h"
32 #include "insn-attr.h"
43 #include "target-def.h"
46 /*{{{ Function Prologues & Epilogues */
48 /* Define the information needed to generate branch and scc insns. This is
49 stored from the compare operation. */
51 struct rtx_def * fr30_compare_op0;
52 struct rtx_def * fr30_compare_op1;
54 /* The FR30 stack looks like this:
56 Before call After call
58 +-----------------------+ +-----------------------+ high
60 | local variables, | | local variables, |
61 | reg save area, etc. | | reg save area, etc. |
63 +-----------------------+ +-----------------------+
65 | args to the func that | | args to this func. |
66 | is being called that | | |
67 SP ->| do not fit in regs | | |
68 +-----------------------+ +-----------------------+
69 | args that used to be | \
70 | in regs; only created | | pretend_size
71 AP-> | for vararg funcs | /
72 +-----------------------+
74 | register save area | |
76 +-----------------------+ | reg_size
78 +-----------------------+ |
79 FP ->| previous frame ptr | /
80 +-----------------------+
82 | local variables | | var_size
84 +-----------------------+
86 low | room for args to | |
87 memory | other funcs called | | args_size
90 +-----------------------+
92 Note, AP is a fake hard register. It will be eliminated in favor of
93 SP or FP as appropriate.
95 Note, Some or all of the stack sections above may be omitted if they
98 /* Structure to be filled in by fr30_compute_frame_size() with register
99 save masks, and offsets for the current function. */
100 struct fr30_frame_info
102 unsigned int total_size; /* # Bytes that the entire frame takes up. */
103 unsigned int pretend_size; /* # Bytes we push and pretend caller did. */
104 unsigned int args_size; /* # Bytes that outgoing arguments take up. */
105 unsigned int reg_size; /* # Bytes needed to store regs. */
106 unsigned int var_size; /* # Bytes that variables take up. */
107 unsigned int frame_size; /* # Bytes in current frame. */
108 unsigned int gmask; /* Mask of saved registers. */
109 unsigned int save_fp; /* Nonzero if frame pointer must be saved. */
110 unsigned int save_rp; /* Nonzero if return popinter must be saved. */
111 int initialised; /* Nonzero if frame size already calculated. */
114 /* Current frame information calculated by fr30_compute_frame_size(). */
115 static struct fr30_frame_info current_frame_info;
117 /* Zero structure to initialize current_frame_info. */
118 static struct fr30_frame_info zero_frame_info;
120 static rtx fr30_pass_by_reference PARAMS ((tree, tree));
121 static rtx fr30_pass_by_value PARAMS ((tree, tree));
123 #define FRAME_POINTER_MASK (1 << (FRAME_POINTER_REGNUM))
124 #define RETURN_POINTER_MASK (1 << (RETURN_POINTER_REGNUM))
126 /* Tell prologue and epilogue if register REGNO should be saved / restored.
127 The return address and frame pointer are treated separately.
128 Don't consider them here. */
129 #define MUST_SAVE_REGISTER(regno) \
130 ( (regno) != RETURN_POINTER_REGNUM \
131 && (regno) != FRAME_POINTER_REGNUM \
132 && regs_ever_live [regno] \
133 && ! call_used_regs [regno] )
135 #define MUST_SAVE_FRAME_POINTER (regs_ever_live [FRAME_POINTER_REGNUM] || frame_pointer_needed)
136 #define MUST_SAVE_RETURN_POINTER (regs_ever_live [RETURN_POINTER_REGNUM] || current_function_profile)
138 #if UNITS_PER_WORD == 4
139 #define WORD_ALIGN(SIZE) (((SIZE) + 3) & ~3)
142 /* Initialize the GCC target structure. */
143 #undef TARGET_ASM_ALIGNED_HI_OP
144 #define TARGET_ASM_ALIGNED_HI_OP "\t.hword\t"
145 #undef TARGET_ASM_ALIGNED_SI_OP
146 #define TARGET_ASM_ALIGNED_SI_OP "\t.word\t"
148 struct gcc_target targetm = TARGET_INITIALIZER;
150 /* Returns the number of bytes offset between FROM_REG and TO_REG
151 for the current function. As a side effect it fills in the
152 current_frame_info structure, if the data is available. */
154 fr30_compute_frame_size (from_reg, to_reg)
159 unsigned int return_value;
160 unsigned int var_size;
161 unsigned int args_size;
162 unsigned int pretend_size;
163 unsigned int reg_size;
166 var_size = WORD_ALIGN (get_frame_size ());
167 args_size = WORD_ALIGN (current_function_outgoing_args_size);
168 pretend_size = current_function_pretend_args_size;
173 /* Calculate space needed for registers. */
174 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno ++)
176 if (MUST_SAVE_REGISTER (regno))
178 reg_size += UNITS_PER_WORD;
183 current_frame_info.save_fp = MUST_SAVE_FRAME_POINTER;
184 current_frame_info.save_rp = MUST_SAVE_RETURN_POINTER;
186 reg_size += (current_frame_info.save_fp + current_frame_info.save_rp)
189 /* Save computed information. */
190 current_frame_info.pretend_size = pretend_size;
191 current_frame_info.var_size = var_size;
192 current_frame_info.args_size = args_size;
193 current_frame_info.reg_size = reg_size;
194 current_frame_info.frame_size = args_size + var_size;
195 current_frame_info.total_size = args_size + var_size + reg_size + pretend_size;
196 current_frame_info.gmask = gmask;
197 current_frame_info.initialised = reload_completed;
199 /* Calculate the required distance. */
202 if (to_reg == STACK_POINTER_REGNUM)
203 return_value += args_size + var_size;
205 if (from_reg == ARG_POINTER_REGNUM)
206 return_value += reg_size;
211 /* Called after register allocation to add any instructions needed for the
212 prologue. Using a prologue insn is favored compared to putting all of the
213 instructions in output_function_prologue(), since it allows the scheduler
214 to intermix instructions with the saves of the caller saved registers. In
215 some cases, it might be necessary to emit a barrier instruction as the last
216 insn to prevent such scheduling. */
219 fr30_expand_prologue ()
224 if (! current_frame_info.initialised)
225 fr30_compute_frame_size (0, 0);
227 /* This cases shouldn't happen. Catch it now. */
228 if (current_frame_info.total_size == 0
229 && current_frame_info.gmask)
232 /* Allocate space for register arguments if this is a variadic function. */
233 if (current_frame_info.pretend_size)
235 int regs_to_save = current_frame_info.pretend_size / UNITS_PER_WORD;
237 /* Push argument registers into the pretend arg area. */
238 for (regno = FIRST_ARG_REGNUM + FR30_NUM_ARG_REGS; regno --, regs_to_save --;)
240 insn = emit_insn (gen_movsi_push (gen_rtx_REG (Pmode, regno)));
241 RTX_FRAME_RELATED_P (insn) = 1;
245 if (current_frame_info.gmask)
247 /* Save any needed call-saved regs. */
248 for (regno = STACK_POINTER_REGNUM; regno--;)
250 if ((current_frame_info.gmask & (1 << regno)) != 0)
252 insn = emit_insn (gen_movsi_push (gen_rtx_REG (Pmode, regno)));
253 RTX_FRAME_RELATED_P (insn) = 1;
258 /* Save return address if necessary. */
259 if (current_frame_info.save_rp)
261 insn = emit_insn (gen_movsi_push (gen_rtx_REG (Pmode,
262 RETURN_POINTER_REGNUM)));
263 RTX_FRAME_RELATED_P (insn) = 1;
266 /* Save old frame pointer and create new one, if necessary. */
267 if (current_frame_info.save_fp)
269 if (current_frame_info.frame_size < ((1 << 10) - UNITS_PER_WORD))
271 int enter_size = current_frame_info.frame_size + UNITS_PER_WORD;
274 insn = emit_insn (gen_enter_func (GEN_INT (enter_size)));
275 RTX_FRAME_RELATED_P (insn) = 1;
277 pattern = PATTERN (insn);
279 /* Also mark all 3 subexpressions as RTX_FRAME_RELATED_P. */
280 if (GET_CODE (pattern) == PARALLEL)
283 for (x = XVECLEN (pattern, 0); x--;)
285 rtx part = XVECEXP (pattern, 0, x);
287 /* One of the insns in the ENTER pattern updates the
288 frame pointer. If we do not actually need the frame
289 pointer in this function then this is a side effect
290 rather than a desired effect, so we do not mark that
291 insn as being related to the frame set up. Doing this
292 allows us to compile the crash66.C test file in the
294 if (! frame_pointer_needed
295 && GET_CODE (part) == SET
296 && REGNO (SET_DEST (part)) == HARD_FRAME_POINTER_REGNUM)
297 RTX_FRAME_RELATED_P (part) = 0;
299 RTX_FRAME_RELATED_P (part) = 1;
305 insn = emit_insn (gen_movsi_push (frame_pointer_rtx));
306 RTX_FRAME_RELATED_P (insn) = 1;
308 if (frame_pointer_needed)
310 insn = emit_insn (gen_movsi (frame_pointer_rtx, stack_pointer_rtx));
311 RTX_FRAME_RELATED_P (insn) = 1;
316 /* Allocate the stack frame. */
317 if (current_frame_info.frame_size == 0)
318 ; /* Nothing to do. */
319 else if (current_frame_info.save_fp
320 && current_frame_info.frame_size < ((1 << 10) - UNITS_PER_WORD))
321 ; /* Nothing to do. */
322 else if (current_frame_info.frame_size <= 512)
324 insn = emit_insn (gen_add_to_stack (GEN_INT (- current_frame_info.frame_size)));
325 RTX_FRAME_RELATED_P (insn) = 1;
329 rtx tmp = gen_rtx_REG (Pmode, PROLOGUE_TMP_REGNUM);
330 insn = emit_insn (gen_movsi (tmp, GEN_INT (current_frame_info.frame_size)));
331 RTX_FRAME_RELATED_P (insn) = 1;
332 insn = emit_insn (gen_subsi3 (stack_pointer_rtx, stack_pointer_rtx, tmp));
333 RTX_FRAME_RELATED_P (insn) = 1;
336 if (current_function_profile)
337 emit_insn (gen_blockage ());
340 /* Called after register allocation to add any instructions needed for the
341 epilogue. Using an epilogue insn is favored compared to putting all of the
342 instructions in output_function_epilogue(), since it allows the scheduler
343 to intermix instructions with the restores of the caller saved registers.
344 In some cases, it might be necessary to emit a barrier instruction as the
345 first insn to prevent such scheduling. */
347 fr30_expand_epilogue ()
351 /* Perform the inversion operations of the prologue. */
352 if (! current_frame_info.initialised)
355 /* Pop local variables and arguments off the stack.
356 If frame_pointer_needed is TRUE then the frame pointer register
357 has actually been used as a frame pointer, and we can recover
358 the stack pointer from it, otherwise we must unwind the stack
360 if (current_frame_info.frame_size > 0)
362 if (current_frame_info.save_fp && frame_pointer_needed)
364 emit_insn (gen_leave_func ());
365 current_frame_info.save_fp = 0;
367 else if (current_frame_info.frame_size <= 508)
368 emit_insn (gen_add_to_stack
369 (GEN_INT (current_frame_info.frame_size)));
372 rtx tmp = gen_rtx_REG (Pmode, PROLOGUE_TMP_REGNUM);
373 emit_insn (gen_movsi (tmp, GEN_INT (current_frame_info.frame_size)));
374 emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, tmp));
378 if (current_frame_info.save_fp)
379 emit_insn (gen_movsi_pop (frame_pointer_rtx));
381 /* Pop all the registers that were pushed. */
382 if (current_frame_info.save_rp)
383 emit_insn (gen_movsi_pop (gen_rtx_REG (Pmode, RETURN_POINTER_REGNUM)));
385 for (regno = 0; regno < STACK_POINTER_REGNUM; regno ++)
386 if (current_frame_info.gmask & (1 << regno))
387 emit_insn (gen_movsi_pop (gen_rtx_REG (Pmode, regno)));
389 if (current_frame_info.pretend_size)
390 emit_insn (gen_add_to_stack (GEN_INT (current_frame_info.pretend_size)));
392 /* Reset state info for each function. */
393 current_frame_info = zero_frame_info;
395 emit_jump_insn (gen_return_from_func ());
398 /* Do any needed setup for a variadic function. We must create a register
399 parameter block, and then copy any anonymous arguments, plus the last
400 named argument, from registers into memory. * copying actually done in
401 fr30_expand_prologue().
403 ARG_REGS_USED_SO_FAR has *not* been updated for the last named argument
404 which has type TYPE and mode MODE, and we rely on this fact. */
406 fr30_setup_incoming_varargs (arg_regs_used_so_far, int_mode, type, pretend_size)
407 CUMULATIVE_ARGS arg_regs_used_so_far;
409 tree type ATTRIBUTE_UNUSED;
412 enum machine_mode mode = (enum machine_mode)int_mode;
416 /* All BLKmode values are passed by reference. */
420 #if STRICT_ARGUMENT_NAMING
421 /* If STRICT_ARGUMENT_NAMING is true then the last named
422 arg must not be treated as an anonymous arg. */
423 arg_regs_used_so_far += fr30_num_arg_regs (int_mode, type);
426 size = FR30_NUM_ARG_REGS - arg_regs_used_so_far;
431 * pretend_size = (size * UNITS_PER_WORD);
435 /*{{{ Printing operands */
437 /* Print a memory address as an operand to reference that memory location. */
440 fr30_print_operand_address (stream, address)
444 switch (GET_CODE (address))
447 output_addr_const (stream, address);
451 fprintf (stderr, "code = %x\n", GET_CODE (address));
453 output_operand_lossage ("fr30_print_operand_address: unhandled address");
458 /* Print an operand. */
461 fr30_print_operand (file, x, code)
471 /* Output a :D if this instruction is delayed. */
472 if (dbr_sequence_length () != 0)
477 /* Compute the register name of the second register in a hi/lo
479 if (GET_CODE (x) != REG)
480 output_operand_lossage ("fr30_print_operand: unrecognized %%p code");
482 fprintf (file, "r%d", REGNO (x) + 1);
486 /* Convert GCC's comparison operators into FR30 comparison codes. */
487 switch (GET_CODE (x))
489 case EQ: fprintf (file, "eq"); break;
490 case NE: fprintf (file, "ne"); break;
491 case LT: fprintf (file, "lt"); break;
492 case LE: fprintf (file, "le"); break;
493 case GT: fprintf (file, "gt"); break;
494 case GE: fprintf (file, "ge"); break;
495 case LTU: fprintf (file, "c"); break;
496 case LEU: fprintf (file, "ls"); break;
497 case GTU: fprintf (file, "hi"); break;
498 case GEU: fprintf (file, "nc"); break;
500 output_operand_lossage ("fr30_print_operand: unrecognized %%b code");
506 /* Convert GCC's comparison operators into the complimentary FR30
508 switch (GET_CODE (x))
510 case EQ: fprintf (file, "ne"); break;
511 case NE: fprintf (file, "eq"); break;
512 case LT: fprintf (file, "ge"); break;
513 case LE: fprintf (file, "gt"); break;
514 case GT: fprintf (file, "le"); break;
515 case GE: fprintf (file, "lt"); break;
516 case LTU: fprintf (file, "nc"); break;
517 case LEU: fprintf (file, "hi"); break;
518 case GTU: fprintf (file, "ls"); break;
519 case GEU: fprintf (file, "c"); break;
521 output_operand_lossage ("fr30_print_operand: unrecognized %%B code");
527 /* Print a signed byte value as an unsigned value. */
528 if (GET_CODE (x) != CONST_INT)
529 output_operand_lossage ("fr30_print_operand: invalid operand to %%A code");
538 fprintf (file, "%d", val);
543 if (GET_CODE (x) != CONST_INT
546 output_operand_lossage ("fr30_print_operand: invalid %%x code");
548 fprintf (file, "%d", INTVAL (x) - 16);
552 if (GET_CODE (x) != CONST_DOUBLE)
553 output_operand_lossage ("fr30_print_operand: invalid %%F code");
558 real_to_decimal (str, CONST_DOUBLE_REAL_VALUE (x),
569 fprintf (stderr, "unknown code = %x\n", code);
570 output_operand_lossage ("fr30_print_operand: unknown code");
574 switch (GET_CODE (x))
577 fputs (reg_names [REGNO (x)], file);
583 switch (GET_CODE (x0))
586 if ((unsigned) REGNO (x0) >= ARRAY_SIZE (reg_names))
588 fprintf (file, "@%s", reg_names [REGNO (x0)]);
592 if (GET_CODE (XEXP (x0, 0)) != REG
593 || REGNO (XEXP (x0, 0)) < FRAME_POINTER_REGNUM
594 || REGNO (XEXP (x0, 0)) > STACK_POINTER_REGNUM
595 || GET_CODE (XEXP (x0, 1)) != CONST_INT)
597 fprintf (stderr, "bad INDEXed address:");
599 output_operand_lossage ("fr30_print_operand: unhandled MEM");
601 else if (REGNO (XEXP (x0, 0)) == FRAME_POINTER_REGNUM)
603 HOST_WIDE_INT val = INTVAL (XEXP (x0, 1));
604 if (val < -(1 << 9) || val > ((1 << 9) - 4))
606 fprintf (stderr, "frame INDEX out of range:");
608 output_operand_lossage ("fr30_print_operand: unhandled MEM");
610 fprintf (file, "@(r14, #%d)", val);
614 HOST_WIDE_INT val = INTVAL (XEXP (x0, 1));
615 if (val < 0 || val > ((1 << 6) - 4))
617 fprintf (stderr, "stack INDEX out of range:");
619 output_operand_lossage ("fr30_print_operand: unhandled MEM");
621 fprintf (file, "@(r15, #%d)", val);
630 fprintf (stderr, "bad MEM code = %x\n", GET_CODE (x0));
632 output_operand_lossage ("fr30_print_operand: unhandled MEM");
638 /* We handle SFmode constants here as output_addr_const doesn't. */
639 if (GET_MODE (x) == SFmode)
644 REAL_VALUE_FROM_CONST_DOUBLE (d, x);
645 REAL_VALUE_TO_TARGET_SINGLE (d, l);
646 fprintf (file, "0x%08lx", l);
650 /* Fall through. Let output_addr_const deal with it. */
652 output_addr_const (file, x);
660 /*{{{ Function arguments */
662 /* Compute the number of word sized registers needed to hold a
663 function argument of mode INT_MODE and tree type TYPE. */
665 fr30_num_arg_regs (int_mode, type)
669 enum machine_mode mode = (enum machine_mode) int_mode;
672 if (MUST_PASS_IN_STACK (mode, type))
675 if (type && mode == BLKmode)
676 size = int_size_in_bytes (type);
678 size = GET_MODE_SIZE (mode);
680 return (size + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
683 /* Implements the FUNCTION_ARG_PARTIAL_NREGS macro.
684 Returns the number of argument registers required to hold *part* of
685 a parameter of machine mode MODE and tree type TYPE (which may be
686 NULL if the type is not known). If the argument fits entirly in
687 the argument registers, or entirely on the stack, then 0 is returned.
688 CUM is the number of argument registers already used by earlier
689 parameters to the function. */
692 fr30_function_arg_partial_nregs (cum, int_mode, type, named)
698 /* Unnamed arguments, ie those that are prototyped as ...
699 are always passed on the stack.
700 Also check here to see if all the argument registers are full. */
701 if (named == 0 || cum >= FR30_NUM_ARG_REGS)
704 /* Work out how many argument registers would be needed if this
705 parameter were to be passed entirely in registers. If there
706 are sufficient argument registers available (or if no registers
707 are needed because the parameter must be passed on the stack)
708 then return zero, as this parameter does not require partial
709 register, partial stack stack space. */
710 if (cum + fr30_num_arg_regs (int_mode, type) <= FR30_NUM_ARG_REGS)
713 /* Otherwise return the number of registers that would be used. */
714 return FR30_NUM_ARG_REGS - cum;
718 fr30_pass_by_reference (valist, type)
726 type_ptr = build_pointer_type (type);
727 type_ptr_ptr = build_pointer_type (type_ptr);
729 t = build (POSTINCREMENT_EXPR, va_list_type_node, valist, build_int_2 (UNITS_PER_WORD, 0));
730 TREE_SIDE_EFFECTS (t) = 1;
731 t = build1 (NOP_EXPR, type_ptr_ptr, t);
732 TREE_SIDE_EFFECTS (t) = 1;
733 t = build1 (INDIRECT_REF, type_ptr, t);
735 return expand_expr (t, NULL_RTX, Pmode, EXPAND_NORMAL);
739 fr30_pass_by_value (valist, type)
743 HOST_WIDE_INT size = int_size_in_bytes (type);
748 if ((size % UNITS_PER_WORD) == 0)
750 t = build (POSTINCREMENT_EXPR, va_list_type_node, valist, build_int_2 (size, 0));
751 TREE_SIDE_EFFECTS (t) = 1;
753 return expand_expr (t, NULL_RTX, Pmode, EXPAND_NORMAL);
756 rsize = (size + UNITS_PER_WORD - 1) & - UNITS_PER_WORD;
758 /* Care for bigendian correction on the aligned address. */
759 t = build (PLUS_EXPR, ptr_type_node, valist, build_int_2 (rsize - size, 0));
760 addr_rtx = expand_expr (t, NULL_RTX, Pmode, EXPAND_NORMAL);
761 addr_rtx = copy_to_reg (addr_rtx);
764 t = build (PLUS_EXPR, va_list_type_node, valist, build_int_2 (rsize, 0));
765 t = build (MODIFY_EXPR, va_list_type_node, valist, t);
766 TREE_SIDE_EFFECTS (t) = 1;
767 expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
772 /* Implement `va_arg'. */
775 fr30_va_arg (valist, type)
781 if (AGGREGATE_TYPE_P (type))
782 return fr30_pass_by_reference (valist, type);
784 size = int_size_in_bytes (type);
786 if ((size % sizeof (int)) == 0
788 return fr30_pass_by_value (valist, type);
790 return fr30_pass_by_reference (valist, type);
794 /*{{{ Operand predicates */
797 #define Mmode enum machine_mode
800 /* Returns true if OPERAND is an integer value suitable for use in
801 an ADDSP instruction. */
803 stack_add_operand (operand, mode)
805 Mmode mode ATTRIBUTE_UNUSED;
808 (GET_CODE (operand) == CONST_INT
809 && INTVAL (operand) >= -512
810 && INTVAL (operand) <= 508
811 && ((INTVAL (operand) & 3) == 0));
814 /* Returns true if OPERAND is an integer value suitable for use in
815 an ADD por ADD2 instruction, or if it is a register. */
817 add_immediate_operand (operand, mode)
819 Mmode mode ATTRIBUTE_UNUSED;
822 (GET_CODE (operand) == REG
823 || (GET_CODE (operand) == CONST_INT
824 && INTVAL (operand) >= -16
825 && INTVAL (operand) <= 15));
828 /* Returns true if OPERAND is hard register in the range 8 - 15. */
830 high_register_operand (operand, mode)
832 Mmode mode ATTRIBUTE_UNUSED;
835 (GET_CODE (operand) == REG
836 && REGNO (operand) <= 15
837 && REGNO (operand) >= 8);
840 /* Returns true if OPERAND is hard register in the range 0 - 7. */
842 low_register_operand (operand, mode)
844 Mmode mode ATTRIBUTE_UNUSED;
847 (GET_CODE (operand) == REG
848 && REGNO (operand) <= 7);
851 /* Returns true if OPERAND is suitable for use in a CALL insn. */
853 call_operand (operand, mode)
855 Mmode mode ATTRIBUTE_UNUSED;
857 return (GET_CODE (operand) == MEM
858 && (GET_CODE (XEXP (operand, 0)) == SYMBOL_REF
859 || GET_CODE (XEXP (operand, 0)) == REG));
862 /* Returns TRUE if OP is a valid operand of a DImode operation. */
864 di_operand (op, mode)
868 if (register_operand (op, mode))
871 if (mode != VOIDmode && GET_MODE (op) != VOIDmode && GET_MODE (op) != DImode)
874 if (GET_CODE (op) == SUBREG)
875 op = SUBREG_REG (op);
877 switch (GET_CODE (op))
884 return memory_address_p (DImode, XEXP (op, 0));
891 /* Returns TRUE if OP is a DImode register or MEM. */
893 nonimmediate_di_operand (op, mode)
897 if (register_operand (op, mode))
900 if (mode != VOIDmode && GET_MODE (op) != VOIDmode && GET_MODE (op) != DImode)
903 if (GET_CODE (op) == SUBREG)
904 op = SUBREG_REG (op);
906 if (GET_CODE (op) == MEM)
907 return memory_address_p (DImode, XEXP (op, 0));
912 /* Returns true iff all the registers in the operands array
913 are in descending or ascending order. */
915 fr30_check_multiple_regs (operands, num_operands, descending)
922 unsigned int prev_regno = 0;
924 while (num_operands --)
926 if (GET_CODE (operands [num_operands]) != REG)
929 if (REGNO (operands [num_operands]) < prev_regno)
932 prev_regno = REGNO (operands [num_operands]);
937 unsigned int prev_regno = CONDITION_CODE_REGNUM;
939 while (num_operands --)
941 if (GET_CODE (operands [num_operands]) != REG)
944 if (REGNO (operands [num_operands]) > prev_regno)
947 prev_regno = REGNO (operands [num_operands]);
955 /*{{{ Instruction Output Routines */
957 /* Output a double word move.
958 It must be REG<-REG, REG<-MEM, MEM<-REG or REG<-CONST.
959 On the FR30 we are contrained by the fact that it does not
960 support offsetable addresses, and so we have to load the
961 address of the secnd word into the second destination register
962 before we can use it. */
965 fr30_move_double (operands)
968 rtx src = operands[1];
969 rtx dest = operands[0];
970 enum rtx_code src_code = GET_CODE (src);
971 enum rtx_code dest_code = GET_CODE (dest);
972 enum machine_mode mode = GET_MODE (dest);
977 if (dest_code == REG)
981 int reverse = (REGNO (dest) == REGNO (src) + 1);
983 /* We normally copy the low-numbered register first. However, if
984 the first register of operand 0 is the same as the second register
985 of operand 1, we must copy in the opposite order. */
986 emit_insn (gen_rtx_SET (VOIDmode,
987 operand_subword (dest, reverse, TRUE, mode),
988 operand_subword (src, reverse, TRUE, mode)));
990 emit_insn (gen_rtx_SET (VOIDmode,
991 operand_subword (dest, !reverse, TRUE, mode),
992 operand_subword (src, !reverse, TRUE, mode)));
994 else if (src_code == MEM)
996 rtx addr = XEXP (src, 0);
997 int dregno = REGNO (dest);
1002 /* If the high-address word is used in the address, we
1003 must load it last. Otherwise, load it first. */
1004 int reverse = (refers_to_regno_p (dregno, dregno + 1, addr, 0) != 0);
1006 if (GET_CODE (addr) != REG)
1009 dest0 = operand_subword (dest, reverse, TRUE, mode);
1010 dest1 = operand_subword (dest, !reverse, TRUE, mode);
1014 emit_insn (gen_rtx_SET (VOIDmode, dest1,
1015 adjust_address (src, SImode, 0)));
1016 emit_insn (gen_rtx_SET (SImode, dest0,
1017 gen_rtx_REG (SImode, REGNO (addr))));
1018 emit_insn (gen_rtx_SET (SImode, dest0,
1019 plus_constant (dest0, UNITS_PER_WORD)));
1021 new_mem = gen_rtx_MEM (SImode, dest0);
1022 MEM_COPY_ATTRIBUTES (new_mem, src);
1024 emit_insn (gen_rtx_SET (VOIDmode, dest0, new_mem));
1028 emit_insn (gen_rtx_SET (VOIDmode, dest0,
1029 adjust_address (src, SImode, 0)));
1030 emit_insn (gen_rtx_SET (SImode, dest1,
1031 gen_rtx_REG (SImode, REGNO (addr))));
1032 emit_insn (gen_rtx_SET (SImode, dest1,
1033 plus_constant (dest1, UNITS_PER_WORD)));
1035 new_mem = gen_rtx_MEM (SImode, dest1);
1036 MEM_COPY_ATTRIBUTES (new_mem, src);
1038 emit_insn (gen_rtx_SET (VOIDmode, dest1, new_mem));
1041 else if (src_code == CONST_INT || src_code == CONST_DOUBLE)
1044 split_double (src, &words[0], &words[1]);
1045 emit_insn (gen_rtx_SET (VOIDmode,
1046 operand_subword (dest, 0, TRUE, mode),
1049 emit_insn (gen_rtx_SET (VOIDmode,
1050 operand_subword (dest, 1, TRUE, mode),
1054 else if (src_code == REG && dest_code == MEM)
1056 rtx addr = XEXP (dest, 0);
1060 if (GET_CODE (addr) != REG)
1063 src0 = operand_subword (src, 0, TRUE, mode);
1064 src1 = operand_subword (src, 1, TRUE, mode);
1066 emit_insn (gen_rtx_SET (VOIDmode, adjust_address (dest, SImode, 0),
1069 if (REGNO (addr) == STACK_POINTER_REGNUM
1070 || REGNO (addr) == FRAME_POINTER_REGNUM)
1071 emit_insn (gen_rtx_SET (VOIDmode,
1072 adjust_address (dest, SImode, UNITS_PER_WORD),
1078 /* We need a scratch register to hold the value of 'address + 4'.
1079 We ought to allow gcc to find one for us, but for now, just
1080 push one of the source registers. */
1081 emit_insn (gen_movsi_push (src0));
1082 emit_insn (gen_movsi_internal (src0, addr));
1083 emit_insn (gen_addsi_small_int (src0, src0, GEN_INT (UNITS_PER_WORD)));
1085 new_mem = gen_rtx_MEM (SImode, src0);
1086 MEM_COPY_ATTRIBUTES (new_mem, dest);
1088 emit_insn (gen_rtx_SET (VOIDmode, new_mem, src1));
1089 emit_insn (gen_movsi_pop (src0));
1093 /* This should have been prevented by the constraints on movdi_insn. */
1102 /* Local Variables: */
1103 /* folded-file: t */