[PATCH 2/2] x86: permit non-immediate offset operands with direct far branches

[H.J. Lu]

On Wed, Oct 16, 2024, 6:04 PM Jan Beulich <jbeulich@suse.com> wrote:

> On 16.10.2024 12:02, H.J. Lu wrote:
> > On Wed, Oct 16, 2024, 3:05 PM Jan Beulich <jbeulich@suse.com> wrote:
> >> On 15.10.2024 21:53, H.J. Lu wrote:
> >>> Real benefit is to provide a CPU feature which can't be
> >>> done by the current assembler.
> >>> Your new syntax may confuse programmers.
> >>> People may use it without realizing it doesn't work
> >>> with older versions
> >>> of assembler or
> >>> other assemblers.
> >>
> >> That's true for many other enhancements we've been making, including any
> >> new
> >> ISA extension support is being added for.
> >
> > We are discussing existing instructions.
>
> Sure; I mentioned new ISAs merely for completeness. Various improvements
> were done to pre-existing insns, too. (Same goes for directives, where
> specific forms may be usable only with new enough gas, even if the
> directive itself may have been around for much longer.)
>

We have been adding new features which can't be done before.
But this change isn't such a case.


> Jan
>
>
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