How do we access higher order bits of a register?

[Ayonam Ray]

On 22 November 2011 23:48, Ian Lance Taylor <iant@google.com> wrote:
> Ayonam Ray <ayonam@gmail.com> writes:
>
>> On 22 November 2011 20:30, Ian Lance Taylor <iant@google.com> wrote:
>>> Ayonam Ray <ayonam@gmail.com> writes:
>>>
>>>> I wanted to write an RTL that would access the higher order bits of a
>>>> register.  I saw that high:<mode> works only with constants or labels.
>>>>  The subreg:<mode> only takes the lower order bits.  Can't find any
>>>> way to address the higher order bits.  Any help would be appreciated.
>>>
>>> If it is a single hard register, use a shift.
>>>
>>> Ian
>>>
>>
>> Thanks for your reply.
>> It is indeed a single hard register.  But I need it as an lvalue.
>
> Use zero_extract.
>
> Ian
>

Thanks Ian.