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mips.h (PREDICATE_CODES): Add stack_operand.

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* config/mips/mips.h (PREDICATE_CODES): Add stack_operand.
	* config/mips/mips.c (stack_operand): New predicate.
	* config/mips/mips.md: Use it for the destination of mips16 insns
	that store $31.

From-SVN: r72158
This commit is contained in:
Richard Sandiford 2003-10-06 17:52:37 +00:00 • committed by Richard Sandiford
parent 4fef83a7dd
commit d902180054
4 changed files with 29 additions and 15 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2003-10-06 Richard Sandiford <rsandifo@redhat.com>
* config/mips/mips.h (PREDICATE_CODES): Add stack_operand.
* config/mips/mips.c (stack_operand): New predicate.
* config/mips/mips.md: Use it for the destination of mips16 insns
that store $31.
2003-10-06 Richard Sandiford <rsandifo@redhat.com>
* config/mips/mips.md (*lowsi): Renamed from lowsi.

16
gcc/config/mips/mips.c
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@ -1543,6 +1543,22 @@ symbolic_operand (rtx op, enum machine_mode mode ATTRIBUTE_UNUSED)
}
/* Return true if OP is a memory reference that uses the stack pointer
as a base register. */
int
stack_operand (rtx op, enum machine_mode mode)
{
struct mips_address_info addr;
return ((mode == VOIDmode || mode == GET_MODE (op))
&& GET_CODE (op) == MEM
&& mips_classify_address (&addr, XEXP (op, 0),
GET_MODE (op), false, true) == ADDRESS_REG
&& addr.reg == stack_pointer_rtx);
}
/* This function is used to implement GO_IF_LEGITIMATE_ADDRESS. It
returns a nonzero value if X is a legitimate address for a memory
operand of the indicated MODE. STRICT is nonzero if this function

1
gcc/config/mips/mips.h
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@ -2806,6 +2806,7 @@ typedef struct mips_args {
{"move_operand", { CONST_INT, CONST_DOUBLE, CONST, \
SYMBOL_REF, LABEL_REF, SUBREG, \
REG, MEM}}, \
{"stack_operand", { MEM }}, \
{"consttable_operand", { LABEL_REF, SYMBOL_REF, CONST_INT, \
CONST_DOUBLE, CONST }}, \
{"fcc_register_operand", { REG, SUBREG }}, \

20
gcc/config/mips/mips.md
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@ -4257,7 +4257,7 @@ dsrl\t%3,%3,1\n\
;; instruction can be generated by save_restore_insns.
(define_insn ""
[(set (match_operand:DI 0 "memory_operand" "=m")
[(set (match_operand:DI 0 "stack_operand" "=m")
(reg:DI 31))]
"TARGET_MIPS16 && TARGET_64BIT"
"sd\t$31,%0"
@ -4401,25 +4401,15 @@ dsrl\t%3,%3,1\n\
}
})
;; We can only store $ra directly into a small sp offset. Should the
;; offset be too wide, non-constant or not sp-based, leave it up to
;; reload to choose a scratch register.
;; We can only store $ra directly into a small sp offset.
(define_insn ""
[(set (mem:SI (plus:SI (reg:SI 29)
(match_operand:SI 0 "small_int" "n")))
[(set (match_operand:SI 0 "stack_operand" "=m")
(reg:SI 31))]
"TARGET_MIPS16"
"sw\t$31,%0($sp)"
"sw\t$31,%0"
[(set_attr "type" "store")
(set_attr "mode" "SI")
(set_attr_alternative
"length"
[(if_then_else
(lt (symbol_ref "(unsigned HOST_WIDE_INT) INTVAL (operands[0])")
(const_int 1024))
(const_int 4)
(const_int 8))])])
(set_attr "mode" "SI")])
;; The difference between these two is whether or not ints are allowed
;; in FP registers (off by default, use -mdebugh to enable).