On Thu, Apr 24, 2008 at 12:01 PM, Mohamed Shafi <[EMAIL PROTECTED]> wrote:
> Hello all,
>
> The target that i am porting in gcc 4.1.2, has the following instructions
>
> setb Rx, bitno
> clrb Rx, bitno
>
> where bit bitno of Rx will either be set or reset.
>
> For statements like
>
> a |= (1 << 2); and
> b &= ~(1 << 2);
>
> I can use the above instructions directly. But i am not sure how to
> write the patterns for the above instructions.
> Can anybody help me with this?
>
What i have done is to have the following pattern
(define_insn "setbhi3"
[(set (match_operand:HI 0 "register_operand" "=r")
(ior:HI (match_operand:HI 1 "register_operand" "%0")
(match_operand:HI 2 "setclrb_operand" "I")))]
""
"setb\\t%0, %2"
)
where setclrb_operand is
(define_predicate "setclrb_operand"
(match_code "const_int")
{
if (CONSTANT_P (op))
{
if (INTVAL(op) && !(INTVAL(op) & (INTVAL(op) - 1)))
if (INTVAL(op) < BITS_PER_WORD)
return 1;
}
return 0;
})
I am now able to generate the instruction.
Is this OK?
Thank you for your time.
Regards,
Shafi.
