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 favour 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");
559 REAL_VALUE_FROM_CONST_DOUBLE (d, x);
560 REAL_VALUE_TO_DECIMAL (d, str, 8);
570 fprintf (stderr, "unknown code = %x\n", code);
571 output_operand_lossage ("fr30_print_operand: unknown code");
575 switch (GET_CODE (x))
578 fputs (reg_names [REGNO (x)], file);
584 switch (GET_CODE (x0))
587 if ((unsigned) REGNO (x0) >= ARRAY_SIZE (reg_names))
589 fprintf (file, "@%s", reg_names [REGNO (x0)]);
593 if (GET_CODE (XEXP (x0, 0)) != REG
594 || REGNO (XEXP (x0, 0)) < FRAME_POINTER_REGNUM
595 || REGNO (XEXP (x0, 0)) > STACK_POINTER_REGNUM
596 || GET_CODE (XEXP (x0, 1)) != CONST_INT)
598 fprintf (stderr, "bad INDEXed address:");
600 output_operand_lossage ("fr30_print_operand: unhandled MEM");
602 else if (REGNO (XEXP (x0, 0)) == FRAME_POINTER_REGNUM)
604 HOST_WIDE_INT val = INTVAL (XEXP (x0, 1));
605 if (val < -(1 << 9) || val > ((1 << 9) - 4))
607 fprintf (stderr, "frame INDEX out of range:");
609 output_operand_lossage ("fr30_print_operand: unhandled MEM");
611 fprintf (file, "@(r14, #%d)", val);
615 HOST_WIDE_INT val = INTVAL (XEXP (x0, 1));
616 if (val < 0 || val > ((1 << 6) - 4))
618 fprintf (stderr, "stack INDEX out of range:");
620 output_operand_lossage ("fr30_print_operand: unhandled MEM");
622 fprintf (file, "@(r15, #%d)", val);
631 fprintf (stderr, "bad MEM code = %x\n", GET_CODE (x0));
633 output_operand_lossage ("fr30_print_operand: unhandled MEM");
639 /* We handle SFmode constants here as output_addr_const doesn't. */
640 if (GET_MODE (x) == SFmode)
645 REAL_VALUE_FROM_CONST_DOUBLE (d, x);
646 REAL_VALUE_TO_TARGET_SINGLE (d, l);
647 fprintf (file, "0x%08lx", l);
651 /* Fall through. Let output_addr_const deal with it. */
653 output_addr_const (file, x);
661 /*{{{ Function arguments */
663 /* Compute the number of word sized registers needed to hold a
664 function argument of mode INT_MODE and tree type TYPE. */
666 fr30_num_arg_regs (int_mode, type)
670 enum machine_mode mode = (enum machine_mode) int_mode;
673 if (MUST_PASS_IN_STACK (mode, type))
676 if (type && mode == BLKmode)
677 size = int_size_in_bytes (type);
679 size = GET_MODE_SIZE (mode);
681 return (size + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
684 /* Implements the FUNCTION_ARG_PARTIAL_NREGS macro.
685 Returns the number of argument registers required to hold *part* of
686 a parameter of machine mode MODE and tree type TYPE (which may be
687 NULL if the type is not known). If the argument fits entirly in
688 the argument registers, or entirely on the stack, then 0 is returned.
689 CUM is the number of argument registers already used by earlier
690 parameters to the function. */
693 fr30_function_arg_partial_nregs (cum, int_mode, type, named)
699 /* Unnamed arguments, ie those that are prototyped as ...
700 are always passed on the stack.
701 Also check here to see if all the argument registers are full. */
702 if (named == 0 || cum >= FR30_NUM_ARG_REGS)
705 /* Work out how many argument registers would be needed if this
706 parameter were to be passed entirely in registers. If there
707 are sufficient argument registers available (or if no registers
708 are needed because the parameter must be passed on the stack)
709 then return zero, as this parameter does not require partial
710 register, partial stack stack space. */
711 if (cum + fr30_num_arg_regs (int_mode, type) <= FR30_NUM_ARG_REGS)
714 /* Otherwise return the number of registers that would be used. */
715 return FR30_NUM_ARG_REGS - cum;
719 fr30_pass_by_reference (valist, type)
727 type_ptr = build_pointer_type (type);
728 type_ptr_ptr = build_pointer_type (type_ptr);
730 t = build (POSTINCREMENT_EXPR, va_list_type_node, valist, build_int_2 (UNITS_PER_WORD, 0));
731 TREE_SIDE_EFFECTS (t) = 1;
732 t = build1 (NOP_EXPR, type_ptr_ptr, t);
733 TREE_SIDE_EFFECTS (t) = 1;
734 t = build1 (INDIRECT_REF, type_ptr, t);
736 return expand_expr (t, NULL_RTX, Pmode, EXPAND_NORMAL);
740 fr30_pass_by_value (valist, type)
744 HOST_WIDE_INT size = int_size_in_bytes (type);
749 if ((size % UNITS_PER_WORD) == 0)
751 t = build (POSTINCREMENT_EXPR, va_list_type_node, valist, build_int_2 (size, 0));
752 TREE_SIDE_EFFECTS (t) = 1;
754 return expand_expr (t, NULL_RTX, Pmode, EXPAND_NORMAL);
757 rsize = (size + UNITS_PER_WORD - 1) & - UNITS_PER_WORD;
759 /* Care for bigendian correction on the aligned address. */
760 t = build (PLUS_EXPR, ptr_type_node, valist, build_int_2 (rsize - size, 0));
761 addr_rtx = expand_expr (t, NULL_RTX, Pmode, EXPAND_NORMAL);
762 addr_rtx = copy_to_reg (addr_rtx);
765 t = build (PLUS_EXPR, va_list_type_node, valist, build_int_2 (rsize, 0));
766 t = build (MODIFY_EXPR, va_list_type_node, valist, t);
767 TREE_SIDE_EFFECTS (t) = 1;
768 expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
773 /* Implement `va_arg'. */
776 fr30_va_arg (valist, type)
782 if (AGGREGATE_TYPE_P (type))
783 return fr30_pass_by_reference (valist, type);
785 size = int_size_in_bytes (type);
787 if ((size % sizeof (int)) == 0
789 return fr30_pass_by_value (valist, type);
791 return fr30_pass_by_reference (valist, type);
795 /*{{{ Operand predicates */
798 #define Mmode enum machine_mode
801 /* Returns true if OPERAND is an integer value suitable for use in
802 an ADDSP instruction. */
804 stack_add_operand (operand, mode)
806 Mmode mode ATTRIBUTE_UNUSED;
809 (GET_CODE (operand) == CONST_INT
810 && INTVAL (operand) >= -512
811 && INTVAL (operand) <= 508
812 && ((INTVAL (operand) & 3) == 0));
815 /* Returns true if OPERAND is an integer value suitable for use in
816 an ADD por ADD2 instruction, or if it is a register. */
818 add_immediate_operand (operand, mode)
820 Mmode mode ATTRIBUTE_UNUSED;
823 (GET_CODE (operand) == REG
824 || (GET_CODE (operand) == CONST_INT
825 && INTVAL (operand) >= -16
826 && INTVAL (operand) <= 15));
829 /* Returns true if OPERAND is hard register in the range 8 - 15. */
831 high_register_operand (operand, mode)
833 Mmode mode ATTRIBUTE_UNUSED;
836 (GET_CODE (operand) == REG
837 && REGNO (operand) <= 15
838 && REGNO (operand) >= 8);
841 /* Returns true if OPERAND is hard register in the range 0 - 7. */
843 low_register_operand (operand, mode)
845 Mmode mode ATTRIBUTE_UNUSED;
848 (GET_CODE (operand) == REG
849 && REGNO (operand) <= 7);
852 /* Returns true if OPERAND is suitable for use in a CALL insn. */
854 call_operand (operand, mode)
856 Mmode mode ATTRIBUTE_UNUSED;
858 return (GET_CODE (operand) == MEM
859 && (GET_CODE (XEXP (operand, 0)) == SYMBOL_REF
860 || GET_CODE (XEXP (operand, 0)) == REG));
863 /* Returns TRUE if OP is a valid operand of a DImode operation. */
865 di_operand (op, mode)
869 if (register_operand (op, mode))
872 if (mode != VOIDmode && GET_MODE (op) != VOIDmode && GET_MODE (op) != DImode)
875 if (GET_CODE (op) == SUBREG)
876 op = SUBREG_REG (op);
878 switch (GET_CODE (op))
885 return memory_address_p (DImode, XEXP (op, 0));
892 /* Returns TRUE if OP is a DImode register or MEM. */
894 nonimmediate_di_operand (op, mode)
898 if (register_operand (op, mode))
901 if (mode != VOIDmode && GET_MODE (op) != VOIDmode && GET_MODE (op) != DImode)
904 if (GET_CODE (op) == SUBREG)
905 op = SUBREG_REG (op);
907 if (GET_CODE (op) == MEM)
908 return memory_address_p (DImode, XEXP (op, 0));
913 /* Returns true iff all the registers in the operands array
914 are in descending or ascending order. */
916 fr30_check_multiple_regs (operands, num_operands, descending)
923 unsigned int prev_regno = 0;
925 while (num_operands --)
927 if (GET_CODE (operands [num_operands]) != REG)
930 if (REGNO (operands [num_operands]) < prev_regno)
933 prev_regno = REGNO (operands [num_operands]);
938 unsigned int prev_regno = CONDITION_CODE_REGNUM;
940 while (num_operands --)
942 if (GET_CODE (operands [num_operands]) != REG)
945 if (REGNO (operands [num_operands]) > prev_regno)
948 prev_regno = REGNO (operands [num_operands]);
956 /*{{{ Instruction Output Routines */
958 /* Output a double word move.
959 It must be REG<-REG, REG<-MEM, MEM<-REG or REG<-CONST.
960 On the FR30 we are contrained by the fact that it does not
961 support offsetable addresses, and so we have to load the
962 address of the secnd word into the second destination register
963 before we can use it. */
966 fr30_move_double (operands)
969 rtx src = operands[1];
970 rtx dest = operands[0];
971 enum rtx_code src_code = GET_CODE (src);
972 enum rtx_code dest_code = GET_CODE (dest);
973 enum machine_mode mode = GET_MODE (dest);
978 if (dest_code == REG)
982 int reverse = (REGNO (dest) == REGNO (src) + 1);
984 /* We normally copy the low-numbered register first. However, if
985 the first register of operand 0 is the same as the second register
986 of operand 1, we must copy in the opposite order. */
987 emit_insn (gen_rtx_SET (VOIDmode,
988 operand_subword (dest, reverse, TRUE, mode),
989 operand_subword (src, reverse, TRUE, mode)));
991 emit_insn (gen_rtx_SET (VOIDmode,
992 operand_subword (dest, !reverse, TRUE, mode),
993 operand_subword (src, !reverse, TRUE, mode)));
995 else if (src_code == MEM)
997 rtx addr = XEXP (src, 0);
998 int dregno = REGNO (dest);
1003 /* If the high-address word is used in the address, we
1004 must load it last. Otherwise, load it first. */
1005 int reverse = (refers_to_regno_p (dregno, dregno + 1, addr, 0) != 0);
1007 if (GET_CODE (addr) != REG)
1010 dest0 = operand_subword (dest, reverse, TRUE, mode);
1011 dest1 = operand_subword (dest, !reverse, TRUE, mode);
1015 emit_insn (gen_rtx_SET (VOIDmode, dest1,
1016 adjust_address (src, SImode, 0)));
1017 emit_insn (gen_rtx_SET (SImode, dest0,
1018 gen_rtx_REG (SImode, REGNO (addr))));
1019 emit_insn (gen_rtx_SET (SImode, dest0,
1020 plus_constant (dest0, UNITS_PER_WORD)));
1022 new_mem = gen_rtx_MEM (SImode, dest0);
1023 MEM_COPY_ATTRIBUTES (new_mem, src);
1025 emit_insn (gen_rtx_SET (VOIDmode, dest0, new_mem));
1029 emit_insn (gen_rtx_SET (VOIDmode, dest0,
1030 adjust_address (src, SImode, 0)));
1031 emit_insn (gen_rtx_SET (SImode, dest1,
1032 gen_rtx_REG (SImode, REGNO (addr))));
1033 emit_insn (gen_rtx_SET (SImode, dest1,
1034 plus_constant (dest1, UNITS_PER_WORD)));
1036 new_mem = gen_rtx_MEM (SImode, dest1);
1037 MEM_COPY_ATTRIBUTES (new_mem, src);
1039 emit_insn (gen_rtx_SET (VOIDmode, dest1, new_mem));
1042 else if (src_code == CONST_INT || src_code == CONST_DOUBLE)
1045 split_double (src, &words[0], &words[1]);
1046 emit_insn (gen_rtx_SET (VOIDmode,
1047 operand_subword (dest, 0, TRUE, mode),
1050 emit_insn (gen_rtx_SET (VOIDmode,
1051 operand_subword (dest, 1, TRUE, mode),
1055 else if (src_code == REG && dest_code == MEM)
1057 rtx addr = XEXP (dest, 0);
1061 if (GET_CODE (addr) != REG)
1064 src0 = operand_subword (src, 0, TRUE, mode);
1065 src1 = operand_subword (src, 1, TRUE, mode);
1067 emit_insn (gen_rtx_SET (VOIDmode, adjust_address (dest, SImode, 0),
1070 if (REGNO (addr) == STACK_POINTER_REGNUM
1071 || REGNO (addr) == FRAME_POINTER_REGNUM)
1072 emit_insn (gen_rtx_SET (VOIDmode,
1073 adjust_address (dest, SImode, UNITS_PER_WORD),
1079 /* We need a scratch register to hold the value of 'address + 4'.
1080 We ought to allow gcc to find one for us, but for now, just
1081 push one of the source registers. */
1082 emit_insn (gen_movsi_push (src0));
1083 emit_insn (gen_movsi_internal (src0, addr));
1084 emit_insn (gen_addsi_small_int (src0, src0, GEN_INT (UNITS_PER_WORD)));
1086 new_mem = gen_rtx_MEM (SImode, src0);
1087 MEM_COPY_ATTRIBUTES (new_mem, dest);
1089 emit_insn (gen_rtx_SET (VOIDmode, new_mem, src1));
1090 emit_insn (gen_movsi_pop (src0));
1094 /* This should have been prevented by the constraints on movdi_insn. */
1103 /* Local Variables: */
1104 /* folded-file: t */