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 GCC.
7 GCC 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 GCC 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 GCC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
26 #include "coretypes.h"
30 #include "hard-reg-set.h"
32 #include "insn-config.h"
33 #include "conditions.h"
34 #include "insn-attr.h"
46 #include "target-def.h"
49 /*{{{ Function Prologues & Epilogues */
51 /* Define the information needed to generate branch and scc insns. This is
52 stored from the compare operation. */
54 struct rtx_def * fr30_compare_op0;
55 struct rtx_def * fr30_compare_op1;
57 /* The FR30 stack looks like this:
59 Before call After call
61 +-----------------------+ +-----------------------+ high
63 | local variables, | | local variables, |
64 | reg save area, etc. | | reg save area, etc. |
66 +-----------------------+ +-----------------------+
68 | args to the func that | | args to this func. |
69 | is being called that | | |
70 SP ->| do not fit in regs | | |
71 +-----------------------+ +-----------------------+
72 | args that used to be | \
73 | in regs; only created | | pretend_size
74 AP-> | for vararg funcs | /
75 +-----------------------+
77 | register save area | |
79 +-----------------------+ | reg_size
81 +-----------------------+ |
82 FP ->| previous frame ptr | /
83 +-----------------------+
85 | local variables | | var_size
87 +-----------------------+
89 low | room for args to | |
90 memory | other funcs called | | args_size
93 +-----------------------+
95 Note, AP is a fake hard register. It will be eliminated in favor of
96 SP or FP as appropriate.
98 Note, Some or all of the stack sections above may be omitted if they
101 /* Structure to be filled in by fr30_compute_frame_size() with register
102 save masks, and offsets for the current function. */
103 struct fr30_frame_info
105 unsigned int total_size; /* # Bytes that the entire frame takes up. */
106 unsigned int pretend_size; /* # Bytes we push and pretend caller did. */
107 unsigned int args_size; /* # Bytes that outgoing arguments take up. */
108 unsigned int reg_size; /* # Bytes needed to store regs. */
109 unsigned int var_size; /* # Bytes that variables take up. */
110 unsigned int frame_size; /* # Bytes in current frame. */
111 unsigned int gmask; /* Mask of saved registers. */
112 unsigned int save_fp; /* Nonzero if frame pointer must be saved. */
113 unsigned int save_rp; /* Nonzero if return pointer must be saved. */
114 int initialised; /* Nonzero if frame size already calculated. */
117 /* Current frame information calculated by fr30_compute_frame_size(). */
118 static struct fr30_frame_info current_frame_info;
120 /* Zero structure to initialize current_frame_info. */
121 static struct fr30_frame_info zero_frame_info;
123 static rtx fr30_pass_by_reference (tree, tree);
124 static rtx fr30_pass_by_value (tree, tree);
126 #define FRAME_POINTER_MASK (1 << (FRAME_POINTER_REGNUM))
127 #define RETURN_POINTER_MASK (1 << (RETURN_POINTER_REGNUM))
129 /* Tell prologue and epilogue if register REGNO should be saved / restored.
130 The return address and frame pointer are treated separately.
131 Don't consider them here. */
132 #define MUST_SAVE_REGISTER(regno) \
133 ( (regno) != RETURN_POINTER_REGNUM \
134 && (regno) != FRAME_POINTER_REGNUM \
135 && regs_ever_live [regno] \
136 && ! call_used_regs [regno] )
138 #define MUST_SAVE_FRAME_POINTER (regs_ever_live [FRAME_POINTER_REGNUM] || frame_pointer_needed)
139 #define MUST_SAVE_RETURN_POINTER (regs_ever_live [RETURN_POINTER_REGNUM] || current_function_profile)
141 #if UNITS_PER_WORD == 4
142 #define WORD_ALIGN(SIZE) (((SIZE) + 3) & ~3)
145 /* Initialize the GCC target structure. */
146 #undef TARGET_ASM_ALIGNED_HI_OP
147 #define TARGET_ASM_ALIGNED_HI_OP "\t.hword\t"
148 #undef TARGET_ASM_ALIGNED_SI_OP
149 #define TARGET_ASM_ALIGNED_SI_OP "\t.word\t"
151 struct gcc_target targetm = TARGET_INITIALIZER;
153 /* Returns the number of bytes offset between FROM_REG and TO_REG
154 for the current function. As a side effect it fills in the
155 current_frame_info structure, if the data is available. */
157 fr30_compute_frame_size (int from_reg, int to_reg)
160 unsigned int return_value;
161 unsigned int var_size;
162 unsigned int args_size;
163 unsigned int pretend_size;
164 unsigned int reg_size;
167 var_size = WORD_ALIGN (get_frame_size ());
168 args_size = WORD_ALIGN (current_function_outgoing_args_size);
169 pretend_size = current_function_pretend_args_size;
174 /* Calculate space needed for registers. */
175 for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno ++)
177 if (MUST_SAVE_REGISTER (regno))
179 reg_size += UNITS_PER_WORD;
184 current_frame_info.save_fp = MUST_SAVE_FRAME_POINTER;
185 current_frame_info.save_rp = MUST_SAVE_RETURN_POINTER;
187 reg_size += (current_frame_info.save_fp + current_frame_info.save_rp)
190 /* Save computed information. */
191 current_frame_info.pretend_size = pretend_size;
192 current_frame_info.var_size = var_size;
193 current_frame_info.args_size = args_size;
194 current_frame_info.reg_size = reg_size;
195 current_frame_info.frame_size = args_size + var_size;
196 current_frame_info.total_size = args_size + var_size + reg_size + pretend_size;
197 current_frame_info.gmask = gmask;
198 current_frame_info.initialised = reload_completed;
200 /* Calculate the required distance. */
203 if (to_reg == STACK_POINTER_REGNUM)
204 return_value += args_size + var_size;
206 if (from_reg == ARG_POINTER_REGNUM)
207 return_value += reg_size;
212 /* Called after register allocation to add any instructions needed for the
213 prologue. Using a prologue insn is favored compared to putting all of the
214 instructions in output_function_prologue(), since it allows the scheduler
215 to intermix instructions with the saves of the caller saved registers. In
216 some cases, it might be necessary to emit a barrier instruction as the last
217 insn to prevent such scheduling. */
220 fr30_expand_prologue (void)
225 if (! current_frame_info.initialised)
226 fr30_compute_frame_size (0, 0);
228 /* This cases shouldn't happen. Catch it now. */
229 if (current_frame_info.total_size == 0
230 && current_frame_info.gmask)
233 /* Allocate space for register arguments if this is a variadic function. */
234 if (current_frame_info.pretend_size)
236 int regs_to_save = current_frame_info.pretend_size / UNITS_PER_WORD;
238 /* Push argument registers into the pretend arg area. */
239 for (regno = FIRST_ARG_REGNUM + FR30_NUM_ARG_REGS; regno --, regs_to_save --;)
241 insn = emit_insn (gen_movsi_push (gen_rtx_REG (Pmode, regno)));
242 RTX_FRAME_RELATED_P (insn) = 1;
246 if (current_frame_info.gmask)
248 /* Save any needed call-saved regs. */
249 for (regno = STACK_POINTER_REGNUM; regno--;)
251 if ((current_frame_info.gmask & (1 << regno)) != 0)
253 insn = emit_insn (gen_movsi_push (gen_rtx_REG (Pmode, regno)));
254 RTX_FRAME_RELATED_P (insn) = 1;
259 /* Save return address if necessary. */
260 if (current_frame_info.save_rp)
262 insn = emit_insn (gen_movsi_push (gen_rtx_REG (Pmode,
263 RETURN_POINTER_REGNUM)));
264 RTX_FRAME_RELATED_P (insn) = 1;
267 /* Save old frame pointer and create new one, if necessary. */
268 if (current_frame_info.save_fp)
270 if (current_frame_info.frame_size < ((1 << 10) - UNITS_PER_WORD))
272 int enter_size = current_frame_info.frame_size + UNITS_PER_WORD;
275 insn = emit_insn (gen_enter_func (GEN_INT (enter_size)));
276 RTX_FRAME_RELATED_P (insn) = 1;
278 pattern = PATTERN (insn);
280 /* Also mark all 3 subexpressions as RTX_FRAME_RELATED_P. */
281 if (GET_CODE (pattern) == PARALLEL)
284 for (x = XVECLEN (pattern, 0); x--;)
286 rtx part = XVECEXP (pattern, 0, x);
288 /* One of the insns in the ENTER pattern updates the
289 frame pointer. If we do not actually need the frame
290 pointer in this function then this is a side effect
291 rather than a desired effect, so we do not mark that
292 insn as being related to the frame set up. Doing this
293 allows us to compile the crash66.C test file in the
295 if (! frame_pointer_needed
296 && GET_CODE (part) == SET
297 && REGNO (SET_DEST (part)) == HARD_FRAME_POINTER_REGNUM)
298 RTX_FRAME_RELATED_P (part) = 0;
300 RTX_FRAME_RELATED_P (part) = 1;
306 insn = emit_insn (gen_movsi_push (frame_pointer_rtx));
307 RTX_FRAME_RELATED_P (insn) = 1;
309 if (frame_pointer_needed)
311 insn = emit_insn (gen_movsi (frame_pointer_rtx, stack_pointer_rtx));
312 RTX_FRAME_RELATED_P (insn) = 1;
317 /* Allocate the stack frame. */
318 if (current_frame_info.frame_size == 0)
319 ; /* Nothing to do. */
320 else if (current_frame_info.save_fp
321 && current_frame_info.frame_size < ((1 << 10) - UNITS_PER_WORD))
322 ; /* Nothing to do. */
323 else if (current_frame_info.frame_size <= 512)
325 insn = emit_insn (gen_add_to_stack (GEN_INT (- current_frame_info.frame_size)));
326 RTX_FRAME_RELATED_P (insn) = 1;
330 rtx tmp = gen_rtx_REG (Pmode, PROLOGUE_TMP_REGNUM);
331 insn = emit_insn (gen_movsi (tmp, GEN_INT (current_frame_info.frame_size)));
332 RTX_FRAME_RELATED_P (insn) = 1;
333 insn = emit_insn (gen_subsi3 (stack_pointer_rtx, stack_pointer_rtx, tmp));
334 RTX_FRAME_RELATED_P (insn) = 1;
337 if (current_function_profile)
338 emit_insn (gen_blockage ());
341 /* Called after register allocation to add any instructions needed for the
342 epilogue. Using an epilogue insn is favored compared to putting all of the
343 instructions in output_function_epilogue(), since it allows the scheduler
344 to intermix instructions with the restores of the caller saved registers.
345 In some cases, it might be necessary to emit a barrier instruction as the
346 first insn to prevent such scheduling. */
348 fr30_expand_epilogue (void)
352 /* Perform the inversion operations of the prologue. */
353 if (! current_frame_info.initialised)
356 /* Pop local variables and arguments off the stack.
357 If frame_pointer_needed is TRUE then the frame pointer register
358 has actually been used as a frame pointer, and we can recover
359 the stack pointer from it, otherwise we must unwind the stack
361 if (current_frame_info.frame_size > 0)
363 if (current_frame_info.save_fp && frame_pointer_needed)
365 emit_insn (gen_leave_func ());
366 current_frame_info.save_fp = 0;
368 else if (current_frame_info.frame_size <= 508)
369 emit_insn (gen_add_to_stack
370 (GEN_INT (current_frame_info.frame_size)));
373 rtx tmp = gen_rtx_REG (Pmode, PROLOGUE_TMP_REGNUM);
374 emit_insn (gen_movsi (tmp, GEN_INT (current_frame_info.frame_size)));
375 emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, tmp));
379 if (current_frame_info.save_fp)
380 emit_insn (gen_movsi_pop (frame_pointer_rtx));
382 /* Pop all the registers that were pushed. */
383 if (current_frame_info.save_rp)
384 emit_insn (gen_movsi_pop (gen_rtx_REG (Pmode, RETURN_POINTER_REGNUM)));
386 for (regno = 0; regno < STACK_POINTER_REGNUM; regno ++)
387 if (current_frame_info.gmask & (1 << regno))
388 emit_insn (gen_movsi_pop (gen_rtx_REG (Pmode, regno)));
390 if (current_frame_info.pretend_size)
391 emit_insn (gen_add_to_stack (GEN_INT (current_frame_info.pretend_size)));
393 /* Reset state info for each function. */
394 current_frame_info = zero_frame_info;
396 emit_jump_insn (gen_return_from_func ());
399 /* Do any needed setup for a variadic function. We must create a register
400 parameter block, and then copy any anonymous arguments, plus the last
401 named argument, from registers into memory. * copying actually done in
402 fr30_expand_prologue().
404 ARG_REGS_USED_SO_FAR has *not* been updated for the last named argument
405 which has type TYPE and mode MODE, and we rely on this fact. */
407 fr30_setup_incoming_varargs (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 (FILE *stream, rtx address)
442 switch (GET_CODE (address))
445 output_addr_const (stream, address);
449 fprintf (stderr, "code = %x\n", GET_CODE (address));
451 output_operand_lossage ("fr30_print_operand_address: unhandled address");
456 /* Print an operand. */
459 fr30_print_operand (FILE *file, rtx x, int code)
466 /* Output a :D if this instruction is delayed. */
467 if (dbr_sequence_length () != 0)
472 /* Compute the register name of the second register in a hi/lo
474 if (GET_CODE (x) != REG)
475 output_operand_lossage ("fr30_print_operand: unrecognized %%p code");
477 fprintf (file, "r%d", REGNO (x) + 1);
481 /* Convert GCC's comparison operators into FR30 comparison codes. */
482 switch (GET_CODE (x))
484 case EQ: fprintf (file, "eq"); break;
485 case NE: fprintf (file, "ne"); break;
486 case LT: fprintf (file, "lt"); break;
487 case LE: fprintf (file, "le"); break;
488 case GT: fprintf (file, "gt"); break;
489 case GE: fprintf (file, "ge"); break;
490 case LTU: fprintf (file, "c"); break;
491 case LEU: fprintf (file, "ls"); break;
492 case GTU: fprintf (file, "hi"); break;
493 case GEU: fprintf (file, "nc"); break;
495 output_operand_lossage ("fr30_print_operand: unrecognized %%b code");
501 /* Convert GCC's comparison operators into the complimentary FR30
503 switch (GET_CODE (x))
505 case EQ: fprintf (file, "ne"); break;
506 case NE: fprintf (file, "eq"); break;
507 case LT: fprintf (file, "ge"); break;
508 case LE: fprintf (file, "gt"); break;
509 case GT: fprintf (file, "le"); break;
510 case GE: fprintf (file, "lt"); break;
511 case LTU: fprintf (file, "nc"); break;
512 case LEU: fprintf (file, "hi"); break;
513 case GTU: fprintf (file, "ls"); break;
514 case GEU: fprintf (file, "c"); break;
516 output_operand_lossage ("fr30_print_operand: unrecognized %%B code");
522 /* Print a signed byte value as an unsigned value. */
523 if (GET_CODE (x) != CONST_INT)
524 output_operand_lossage ("fr30_print_operand: invalid operand to %%A code");
533 fprintf (file, HOST_WIDE_INT_PRINT_DEC, val);
538 if (GET_CODE (x) != CONST_INT
541 output_operand_lossage ("fr30_print_operand: invalid %%x code");
543 fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (x) - 16);
547 if (GET_CODE (x) != CONST_DOUBLE)
548 output_operand_lossage ("fr30_print_operand: invalid %%F code");
553 real_to_decimal (str, CONST_DOUBLE_REAL_VALUE (x),
564 fprintf (stderr, "unknown code = %x\n", code);
565 output_operand_lossage ("fr30_print_operand: unknown code");
569 switch (GET_CODE (x))
572 fputs (reg_names [REGNO (x)], file);
578 switch (GET_CODE (x0))
581 if ((unsigned) REGNO (x0) >= ARRAY_SIZE (reg_names))
583 fprintf (file, "@%s", reg_names [REGNO (x0)]);
587 if (GET_CODE (XEXP (x0, 0)) != REG
588 || REGNO (XEXP (x0, 0)) < FRAME_POINTER_REGNUM
589 || REGNO (XEXP (x0, 0)) > STACK_POINTER_REGNUM
590 || GET_CODE (XEXP (x0, 1)) != CONST_INT)
592 fprintf (stderr, "bad INDEXed address:");
594 output_operand_lossage ("fr30_print_operand: unhandled MEM");
596 else if (REGNO (XEXP (x0, 0)) == FRAME_POINTER_REGNUM)
598 HOST_WIDE_INT val = INTVAL (XEXP (x0, 1));
599 if (val < -(1 << 9) || val > ((1 << 9) - 4))
601 fprintf (stderr, "frame INDEX out of range:");
603 output_operand_lossage ("fr30_print_operand: unhandled MEM");
605 fprintf (file, "@(r14, #" HOST_WIDE_INT_PRINT_DEC ")", val);
609 HOST_WIDE_INT val = INTVAL (XEXP (x0, 1));
610 if (val < 0 || val > ((1 << 6) - 4))
612 fprintf (stderr, "stack INDEX out of range:");
614 output_operand_lossage ("fr30_print_operand: unhandled MEM");
616 fprintf (file, "@(r15, #" HOST_WIDE_INT_PRINT_DEC ")", val);
625 fprintf (stderr, "bad MEM code = %x\n", GET_CODE (x0));
627 output_operand_lossage ("fr30_print_operand: unhandled MEM");
633 /* We handle SFmode constants here as output_addr_const doesn't. */
634 if (GET_MODE (x) == SFmode)
639 REAL_VALUE_FROM_CONST_DOUBLE (d, x);
640 REAL_VALUE_TO_TARGET_SINGLE (d, l);
641 fprintf (file, "0x%08lx", l);
645 /* Fall through. Let output_addr_const deal with it. */
647 output_addr_const (file, x);
655 /*{{{ Function arguments */
657 /* Compute the number of word sized registers needed to hold a
658 function argument of mode INT_MODE and tree type TYPE. */
660 fr30_num_arg_regs (int int_mode, tree type)
662 enum machine_mode mode = (enum machine_mode) int_mode;
665 if (MUST_PASS_IN_STACK (mode, type))
668 if (type && mode == BLKmode)
669 size = int_size_in_bytes (type);
671 size = GET_MODE_SIZE (mode);
673 return (size + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
676 /* Implements the FUNCTION_ARG_PARTIAL_NREGS macro.
677 Returns the number of argument registers required to hold *part* of
678 a parameter of machine mode MODE and tree type TYPE (which may be
679 NULL if the type is not known). If the argument fits entirely in
680 the argument registers, or entirely on the stack, then 0 is returned.
681 CUM is the number of argument registers already used by earlier
682 parameters to the function. */
685 fr30_function_arg_partial_nregs (CUMULATIVE_ARGS cum, int int_mode,
686 tree type, int named)
688 /* Unnamed arguments, ie those that are prototyped as ...
689 are always passed on the stack.
690 Also check here to see if all the argument registers are full. */
691 if (named == 0 || cum >= FR30_NUM_ARG_REGS)
694 /* Work out how many argument registers would be needed if this
695 parameter were to be passed entirely in registers. If there
696 are sufficient argument registers available (or if no registers
697 are needed because the parameter must be passed on the stack)
698 then return zero, as this parameter does not require partial
699 register, partial stack stack space. */
700 if (cum + fr30_num_arg_regs (int_mode, type) <= FR30_NUM_ARG_REGS)
703 /* Otherwise return the number of registers that would be used. */
704 return FR30_NUM_ARG_REGS - cum;
708 fr30_pass_by_reference (tree valist, tree type)
714 type_ptr = build_pointer_type (type);
715 type_ptr_ptr = build_pointer_type (type_ptr);
717 t = build (POSTINCREMENT_EXPR, va_list_type_node, valist, build_int_2 (UNITS_PER_WORD, 0));
718 TREE_SIDE_EFFECTS (t) = 1;
719 t = build1 (NOP_EXPR, type_ptr_ptr, t);
720 TREE_SIDE_EFFECTS (t) = 1;
721 t = build1 (INDIRECT_REF, type_ptr, t);
723 return expand_expr (t, NULL_RTX, Pmode, EXPAND_NORMAL);
727 fr30_pass_by_value (tree valist, tree type)
729 HOST_WIDE_INT size = int_size_in_bytes (type);
734 if ((size % UNITS_PER_WORD) == 0)
736 t = build (POSTINCREMENT_EXPR, va_list_type_node, valist, build_int_2 (size, 0));
737 TREE_SIDE_EFFECTS (t) = 1;
739 return expand_expr (t, NULL_RTX, Pmode, EXPAND_NORMAL);
742 rsize = (size + UNITS_PER_WORD - 1) & - UNITS_PER_WORD;
744 /* Care for bigendian correction on the aligned address. */
745 t = build (PLUS_EXPR, ptr_type_node, valist, build_int_2 (rsize - size, 0));
746 addr_rtx = expand_expr (t, NULL_RTX, Pmode, EXPAND_NORMAL);
747 addr_rtx = copy_to_reg (addr_rtx);
750 t = build (PLUS_EXPR, va_list_type_node, valist, build_int_2 (rsize, 0));
751 t = build (MODIFY_EXPR, va_list_type_node, valist, t);
752 TREE_SIDE_EFFECTS (t) = 1;
753 expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
758 /* Implement `va_arg'. */
761 fr30_va_arg (tree valist, tree type)
765 if (AGGREGATE_TYPE_P (type))
766 return fr30_pass_by_reference (valist, type);
768 size = int_size_in_bytes (type);
770 if ((size % sizeof (int)) == 0
772 return fr30_pass_by_value (valist, type);
774 return fr30_pass_by_reference (valist, type);
778 /*{{{ Operand predicates */
781 #define Mmode enum machine_mode
784 /* Returns true if OPERAND is an integer value suitable for use in
785 an ADDSP instruction. */
787 stack_add_operand (rtx operand, Mmode mode ATTRIBUTE_UNUSED)
790 (GET_CODE (operand) == CONST_INT
791 && INTVAL (operand) >= -512
792 && INTVAL (operand) <= 508
793 && ((INTVAL (operand) & 3) == 0));
796 /* Returns true if OPERAND is an integer value suitable for use in
797 an ADD por ADD2 instruction, or if it is a register. */
799 add_immediate_operand (rtx operand, Mmode mode ATTRIBUTE_UNUSED)
802 (GET_CODE (operand) == REG
803 || (GET_CODE (operand) == CONST_INT
804 && INTVAL (operand) >= -16
805 && INTVAL (operand) <= 15));
808 /* Returns true if OPERAND is hard register in the range 8 - 15. */
810 high_register_operand (rtx operand, Mmode mode ATTRIBUTE_UNUSED)
813 (GET_CODE (operand) == REG
814 && REGNO (operand) <= 15
815 && REGNO (operand) >= 8);
818 /* Returns true if OPERAND is hard register in the range 0 - 7. */
820 low_register_operand (rtx operand, Mmode mode ATTRIBUTE_UNUSED)
823 (GET_CODE (operand) == REG
824 && REGNO (operand) <= 7);
827 /* Returns true if OPERAND is suitable for use in a CALL insn. */
829 call_operand (rtx operand, Mmode mode ATTRIBUTE_UNUSED)
831 return (GET_CODE (operand) == MEM
832 && (GET_CODE (XEXP (operand, 0)) == SYMBOL_REF
833 || GET_CODE (XEXP (operand, 0)) == REG));
836 /* Returns TRUE if OP is a valid operand of a DImode operation. */
838 di_operand (rtx op, Mmode mode)
840 if (register_operand (op, mode))
843 if (mode != VOIDmode && GET_MODE (op) != VOIDmode && GET_MODE (op) != DImode)
846 if (GET_CODE (op) == SUBREG)
847 op = SUBREG_REG (op);
849 switch (GET_CODE (op))
856 return memory_address_p (DImode, XEXP (op, 0));
863 /* Returns TRUE if OP is a DImode register or MEM. */
865 nonimmediate_di_operand (rtx op, Mmode mode)
867 if (register_operand (op, mode))
870 if (mode != VOIDmode && GET_MODE (op) != VOIDmode && GET_MODE (op) != DImode)
873 if (GET_CODE (op) == SUBREG)
874 op = SUBREG_REG (op);
876 if (GET_CODE (op) == MEM)
877 return memory_address_p (DImode, XEXP (op, 0));
882 /* Returns true iff all the registers in the operands array
883 are in descending or ascending order. */
885 fr30_check_multiple_regs (rtx *operands, int num_operands, int descending)
889 unsigned int prev_regno = 0;
891 while (num_operands --)
893 if (GET_CODE (operands [num_operands]) != REG)
896 if (REGNO (operands [num_operands]) < prev_regno)
899 prev_regno = REGNO (operands [num_operands]);
904 unsigned int prev_regno = CONDITION_CODE_REGNUM;
906 while (num_operands --)
908 if (GET_CODE (operands [num_operands]) != REG)
911 if (REGNO (operands [num_operands]) > prev_regno)
914 prev_regno = REGNO (operands [num_operands]);
922 fr30_const_double_is_zero (rtx operand)
926 if (operand == NULL || GET_CODE (operand) != CONST_DOUBLE)
929 REAL_VALUE_FROM_CONST_DOUBLE (d, operand);
931 return REAL_VALUES_EQUAL (d, dconst0);
935 /*{{{ Instruction Output Routines */
937 /* Output a double word move.
938 It must be REG<-REG, REG<-MEM, MEM<-REG or REG<-CONST.
939 On the FR30 we are constrained by the fact that it does not
940 support offsetable addresses, and so we have to load the
941 address of the secnd word into the second destination register
942 before we can use it. */
945 fr30_move_double (rtx * operands)
947 rtx src = operands[1];
948 rtx dest = operands[0];
949 enum rtx_code src_code = GET_CODE (src);
950 enum rtx_code dest_code = GET_CODE (dest);
951 enum machine_mode mode = GET_MODE (dest);
956 if (dest_code == REG)
960 int reverse = (REGNO (dest) == REGNO (src) + 1);
962 /* We normally copy the low-numbered register first. However, if
963 the first register of operand 0 is the same as the second register
964 of operand 1, we must copy in the opposite order. */
965 emit_insn (gen_rtx_SET (VOIDmode,
966 operand_subword (dest, reverse, TRUE, mode),
967 operand_subword (src, reverse, TRUE, mode)));
969 emit_insn (gen_rtx_SET (VOIDmode,
970 operand_subword (dest, !reverse, TRUE, mode),
971 operand_subword (src, !reverse, TRUE, mode)));
973 else if (src_code == MEM)
975 rtx addr = XEXP (src, 0);
976 int dregno = REGNO (dest);
981 /* If the high-address word is used in the address, we
982 must load it last. Otherwise, load it first. */
983 int reverse = (refers_to_regno_p (dregno, dregno + 1, addr, 0) != 0);
985 if (GET_CODE (addr) != REG)
988 dest0 = operand_subword (dest, reverse, TRUE, mode);
989 dest1 = operand_subword (dest, !reverse, TRUE, mode);
993 emit_insn (gen_rtx_SET (VOIDmode, dest1,
994 adjust_address (src, SImode, 0)));
995 emit_insn (gen_rtx_SET (SImode, dest0,
996 gen_rtx_REG (SImode, REGNO (addr))));
997 emit_insn (gen_rtx_SET (SImode, dest0,
998 plus_constant (dest0, UNITS_PER_WORD)));
1000 new_mem = gen_rtx_MEM (SImode, dest0);
1001 MEM_COPY_ATTRIBUTES (new_mem, src);
1003 emit_insn (gen_rtx_SET (VOIDmode, dest0, new_mem));
1007 emit_insn (gen_rtx_SET (VOIDmode, dest0,
1008 adjust_address (src, SImode, 0)));
1009 emit_insn (gen_rtx_SET (SImode, dest1,
1010 gen_rtx_REG (SImode, REGNO (addr))));
1011 emit_insn (gen_rtx_SET (SImode, dest1,
1012 plus_constant (dest1, UNITS_PER_WORD)));
1014 new_mem = gen_rtx_MEM (SImode, dest1);
1015 MEM_COPY_ATTRIBUTES (new_mem, src);
1017 emit_insn (gen_rtx_SET (VOIDmode, dest1, new_mem));
1020 else if (src_code == CONST_INT || src_code == CONST_DOUBLE)
1023 split_double (src, &words[0], &words[1]);
1024 emit_insn (gen_rtx_SET (VOIDmode,
1025 operand_subword (dest, 0, TRUE, mode),
1028 emit_insn (gen_rtx_SET (VOIDmode,
1029 operand_subword (dest, 1, TRUE, mode),
1033 else if (src_code == REG && dest_code == MEM)
1035 rtx addr = XEXP (dest, 0);
1039 if (GET_CODE (addr) != REG)
1042 src0 = operand_subword (src, 0, TRUE, mode);
1043 src1 = operand_subword (src, 1, TRUE, mode);
1045 emit_insn (gen_rtx_SET (VOIDmode, adjust_address (dest, SImode, 0),
1048 if (REGNO (addr) == STACK_POINTER_REGNUM
1049 || REGNO (addr) == FRAME_POINTER_REGNUM)
1050 emit_insn (gen_rtx_SET (VOIDmode,
1051 adjust_address (dest, SImode, UNITS_PER_WORD),
1057 /* We need a scratch register to hold the value of 'address + 4'.
1058 We ought to allow gcc to find one for us, but for now, just
1059 push one of the source registers. */
1060 emit_insn (gen_movsi_push (src0));
1061 emit_insn (gen_movsi_internal (src0, addr));
1062 emit_insn (gen_addsi_small_int (src0, src0, GEN_INT (UNITS_PER_WORD)));
1064 new_mem = gen_rtx_MEM (SImode, src0);
1065 MEM_COPY_ATTRIBUTES (new_mem, dest);
1067 emit_insn (gen_rtx_SET (VOIDmode, new_mem, src1));
1068 emit_insn (gen_movsi_pop (src0));
1072 /* This should have been prevented by the constraints on movdi_insn. */
1081 /* Local Variables: */
1082 /* folded-file: t */