This is the mail archive of the gcc-help@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: How do we access higher order bits of a register?


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.

Ayonam


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]