[U-Boot] merge arm64 to arm

[Scott Wood]

On Sat, 2013-08-17 at 15:55 +0100, Måns Rullgård wrote:
> FengHua <fenghua at phytium.com.cn> writes:
> 
> >> FengHua <fenghua at phytium.com.cn> writes:
> >> 
> >> > hi tom,
> >> > hi albert,
> >> > yes, it's right. the u-boot could be more uniformly and maintainable
> >> > if merging armv8 to arm architecture. I will try to migrate arm64 to
> >> > armv8 subarchitecture of arm. do you have any other advice?
> >> 
> >> Why?  The architectures are vastly different, arm64 (aarch64) being only
> >> loosely inspired by the 32-bit arm.  It is not like with x86/amd64 where
> >> a lot of code can be shared.
> >
> > Of course, with a seperated architecture the arm64 code will be clear
> > and simple. when it merged with arm a few file should be duplicated
> > with the name "_v8" appended and many macro switch should be
> > added. but most of the code will be in armv8 directory which
> > paralleled with armv7. it seems that this implementation are more
> > nice.
> 
> ARMv8 defines both a 32-bit (aarch32) and a 64-bit (aarch64) instruction
> set.  The naming you are suggesting would be misleading.

Yes, the asm files should be suffixed with "64" rather than "_v8".

-Scott