Re: [PING][AARCH64, Question] Does AARCH64 GCC support long calls?

[Yangfei (Felix)]

> On Fri, Oct 24, 2014 at 8:35 PM, Yangfei (Felix) <felix.y...@huawei.com> 
> wrote:
> >> Hi,
> >>
> >>     I find that the -mlong-calls option is not there for AARCH64. So
> >> can this port generate long calls?
> >>     Any plan on this option? I would like to have a try on this if it's 
> >> missing :-)
> >>     Thanks.
> >
> >
> > Any comments?
> 
> Yes you can use -mcmodel=large to this effect I think.
> 
> Thanks,
> Andrew Pinski


Thanks for the reply.  It seems that -mcmodel=large is different from 
-mlong-calls. 
GCC still emit the BL instruction with -mcmodel=large.  I thinks GCC should 
emit BLR instruction with -mlong-calls, right? 

void test();
int main()
{
        test();
}

Assembly for this main with -mcmodel=large option:

main:
        stp     x29, x30, [sp, -16]!
        add     x29, sp, 0
        bl      test
        ldp     x29, x30, [sp], 16
        ret