Re: Intel vs AMD x86-64

H. Peter Anvin
2004-02-25T16:19:57Z

Followup to: <403CCBE0.7050100@techsource.com>
By author: Timothy Miller <miller@techsource.com>
In newsgroup: linux.dev.kernel
>
>
> Nakajima, Jun wrote:
> > No, it's not a problem. Branches with 16-bit operand size are not useful
> > for compilers.
>
> From AMD's documentation, I got the impression that 66H caused near
> branches to be 32 bits in long mode (default is 64).
>
> So, Intel makes it 16 bits, and AMD makes it 32 bits?
>
> Either way, I don't see much use for either one.
>

Both claims are pretty bogus. Shorter branches are quite nice for
intraprocedural jumps; it reduces the cache footprint.

-hpa