Hi, it works.
But the constrains are really long.
I use "U" for memory operands with address "R18+offset", and "S" for
memory operands with address "R16" or "R17", and "Q" for memory
operands with constant address(such as symbol ref, or const_int), the
all combinations are as more as 43 types, and I have to change
"MAX_RECOG_ALTERNATIVES" from "30" to be larger constants in
"recog.h".
(define_insn "*iorqi3_noimm_to_reg"
[(set (match_operand:QI 0 "register_mem_operand"
"=r,r,r,r,r,r,r,r,r,r,r,r,r,U,U,U,S,S,S,Q,Q,Q,U,S,Q,U,U,U,U,U,U,S,S,S,S,S,S,Q,Q,Q,Q,Q,Q")
(ior:QI (match_operand:QI 1 "register_mem_operand"
"%0,0,0,0,U,U,U,S,S,S,Q,Q,Q,r,r,r,r,r,r,r,r,r,r,r,r,U,U,U,S,Q,Q,U,U,U,S,Q,Q,U,U,U,S,Q,Q")
(match_operand:QI 2 "register_mem_operand"
"U,S,Q,r,U,S,Q,U,S,Q,U,S,Q,U,S,Q,U,S,Q,U,S,Q,r,r,r,U,S,Q,S,S,Q,U,S,Q,S,S,Q,U,S,Q,S,S,Q")))]
""
"..."
[( set_attr "length"
"3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3"
)
( set_attr "clobberb"
"no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no,no"
)])
Is there any suggestions about this "long" constraints?
Thanks!
2010/7/23 Ian Lance Taylor <i...@google.com>:
> redriver jiang <jiang.redri...@gmail.com> writes:
>
>> Hi,
>>
>> You mean I should define insn like this:
>>
>> (define_insn "*iorqi3_imm"
>> [(set (mem:QI (match_operand:HI 0 "register_operand" "b"))
>> (ior:QI (mem:QI (match_operand:HI 1 "register_operand" "b")
>> (mem:QI (plus: HI (match_operand:HI 2
>> "register_operand" "f")
>> (match_operand: 3 HI
>> "immediate_operand" "K") ))))]
>> ""
>> "..."
>> [( set_attr "length" "1" )])
>>
>> "b" for R16,R17,R18, and "f" for R18, "K" for immediate operand with
>> range "0-127"?
>
> Sort of, but you shouldn't write the PLUS in the insn. Instead, write a
> new constraint which accepts either a R16, R17, or R18 plus an offset.
> Also, write the insn with three alternatives, with the offset constraint
> in each position.
>
> Ian
>
