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. */
29 #include "hard-reg-set.h"
31 #include "insn-config.h"
32 #include "conditions.h"
34 #include "insn-attr.h"
44 #include "target-def.h"
47 /*{{{ Function Prologues & Epilogues */
49 /* Define the information needed to generate branch and scc insns. This is
50 stored from the compare operation. */
52 struct rtx_def * fr30_compare_op0;
53 struct rtx_def * fr30_compare_op1;
55 /* The FR30 stack looks like this:
57 Before call After call
59 +-----------------------+ +-----------------------+ high
61 | local variables, | | local variables, |
62 | reg save area, etc. | | reg save area, etc. |
64 +-----------------------+ +-----------------------+
66 | args to the func that | | args to this func. |
67 | is being called that | | |
68 SP ->| do not fit in regs | | |
69 +-----------------------+ +-----------------------+
70 | args that used to be | \
71 | in regs; only created | | pretend_size
72 AP-> | for vararg funcs | /
73 +-----------------------+
75 | register save area | |
77 +-----------------------+ | reg_size
79 +-----------------------+ |
80 FP ->| previous frame ptr | /
81 +-----------------------+
83 | local variables | | var_size
85 +-----------------------+
87 low | room for args to | |
88 memory | other funcs called | | args_size
91 +-----------------------+
93 Note, AP is a fake hard register. It will be eliminated in favour of
94 SP or FP as appropriate.
96 Note, Some or all of the stack sections above may be omitted if they
99 /* Structure to be filled in by fr30_compute_frame_size() with register
100 save masks, and offsets for the current function. */
101 struct fr30_frame_info
103 unsigned int total_size; /* # Bytes that the entire frame takes up. */
104 unsigned int pretend_size; /* # Bytes we push and pretend caller did. */
105 unsigned int args_size; /* # Bytes that outgoing arguments take up. */
106 unsigned int reg_size; /* # Bytes needed to store regs. */
107 unsigned int var_size; /* # Bytes that variables take up. */
108 unsigned int frame_size; /* # Bytes in current frame. */
109 unsigned int gmask; /* Mask of saved registers. */
110 unsigned int save_fp; /* Nonzero if frame pointer must be saved. */
111 unsigned int save_rp; /* Nonzero if return popinter must be saved. */
112 int initialised; /* Nonzero if frame size already calculated. */
115 /* Current frame information calculated by fr30_compute_frame_size(). */
116 static struct fr30_frame_info current_frame_info;
118 /* Zero structure to initialize current_frame_info. */
119 static struct fr30_frame_info zero_frame_info;
121 static rtx fr30_pass_by_reference PARAMS ((tree, tree));
122 static rtx fr30_pass_by_value PARAMS ((tree, tree));
124 #define FRAME_POINTER_MASK (1 << (FRAME_POINTER_REGNUM))
125 #define RETURN_POINTER_MASK (1 << (RETURN_POINTER_REGNUM))
127 /* Tell prologue and epilogue if register REGNO should be saved / restored.
128 The return address and frame pointer are treated separately.
129 Don't consider them here. */
130 #define MUST_SAVE_REGISTER(regno) \
131 ( (regno) != RETURN_POINTER_REGNUM \
132 && (regno) != FRAME_POINTER_REGNUM \
133 && regs_ever_live [regno] \
134 && ! call_used_regs [regno] )
136 #define MUST_SAVE_FRAME_POINTER (regs_ever_live [FRAME_POINTER_REGNUM] || frame_pointer_needed)
137 #define MUST_SAVE_RETURN_POINTER (regs_ever_live [RETURN_POINTER_REGNUM] || current_function_profile)
139 #if UNITS_PER_WORD == 4
140 #define WORD_ALIGN(SIZE) (((SIZE) + 3) & ~3)
143 /* Initialize the GCC target structure. */
144 #undef TARGET_ASM_ALIGNED_HI_OP
145 #define TARGET_ASM_ALIGNED_HI_OP "\t.hword\t"
146 #undef TARGET_ASM_ALIGNED_SI_OP
147 #define TARGET_ASM_ALIGNED_SI_OP "\t.word\t"
149 struct gcc_target targetm = TARGET_INITIALIZER;
151 /* Returns the number of bytes offset between FROM_REG and TO_REG
152 for the current function. As a side effect it fills in the
153 current_frame_info structure, if the data is available. */
155 fr30_compute_frame_size (from_reg, 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 ()
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 ()
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 (arg_regs_used_so_far, int_mode, type, pretend_size)
408 CUMULATIVE_ARGS arg_regs_used_so_far;
410 tree type ATTRIBUTE_UNUSED;
413 enum machine_mode mode = (enum machine_mode)int_mode;
417 /* All BLKmode values are passed by reference. */
421 #if STRICT_ARGUMENT_NAMING
422 /* If STRICT_ARGUMENT_NAMING is true then the last named
423 arg must not be treated as an anonymous arg. */
424 arg_regs_used_so_far += fr30_num_arg_regs (int_mode, type);
427 size = FR30_NUM_ARG_REGS - arg_regs_used_so_far;
432 * pretend_size = (size * UNITS_PER_WORD);
436 /*{{{ Printing operands */
438 /* Print a memory address as an operand to reference that memory location. */
441 fr30_print_operand_address (stream, address)
445 switch (GET_CODE (address))
448 output_addr_const (stream, address);
452 fprintf (stderr, "code = %x\n", GET_CODE (address));
454 output_operand_lossage ("fr30_print_operand_address: unhandled address");
459 /* Print an operand. */
462 fr30_print_operand (file, x, code)
472 /* Output a :D if this instruction is delayed. */
473 if (dbr_sequence_length () != 0)
478 /* Compute the register name of the second register in a hi/lo
480 if (GET_CODE (x) != REG)
481 output_operand_lossage ("fr30_print_operand: unrecognized %%p code");
483 fprintf (file, "r%d", REGNO (x) + 1);
487 /* Convert GCC's comparison operators into FR30 comparison codes. */
488 switch (GET_CODE (x))
490 case EQ: fprintf (file, "eq"); break;
491 case NE: fprintf (file, "ne"); break;
492 case LT: fprintf (file, "lt"); break;
493 case LE: fprintf (file, "le"); break;
494 case GT: fprintf (file, "gt"); break;
495 case GE: fprintf (file, "ge"); break;
496 case LTU: fprintf (file, "c"); break;
497 case LEU: fprintf (file, "ls"); break;
498 case GTU: fprintf (file, "hi"); break;
499 case GEU: fprintf (file, "nc"); break;
501 output_operand_lossage ("fr30_print_operand: unrecognized %%b code");
507 /* Convert GCC's comparison operators into the complimentary FR30
509 switch (GET_CODE (x))
511 case EQ: fprintf (file, "ne"); break;
512 case NE: fprintf (file, "eq"); break;
513 case LT: fprintf (file, "ge"); break;
514 case LE: fprintf (file, "gt"); break;
515 case GT: fprintf (file, "le"); break;
516 case GE: fprintf (file, "lt"); break;
517 case LTU: fprintf (file, "nc"); break;
518 case LEU: fprintf (file, "hi"); break;
519 case GTU: fprintf (file, "ls"); break;
520 case GEU: fprintf (file, "c"); break;
522 output_operand_lossage ("fr30_print_operand: unrecognized %%B code");
528 /* Print a signed byte value as an unsigned value. */
529 if (GET_CODE (x) != CONST_INT)
530 output_operand_lossage ("fr30_print_operand: invalid operand to %%A code");
539 fprintf (file, "%d", val);
544 if (GET_CODE (x) != CONST_INT
547 output_operand_lossage ("fr30_print_operand: invalid %%x code");
549 fprintf (file, "%d", INTVAL (x) - 16);
553 if (GET_CODE (x) != CONST_DOUBLE)
554 output_operand_lossage ("fr30_print_operand: invalid %%F code");
559 REAL_VALUE_FROM_CONST_DOUBLE (d, x);
560 fprintf (file, "%.8f", d);
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. */