[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Bug gas/25550] Review .arch directives

From: jbeulich at suse dot com
Subject: [Bug gas/25550] Review .arch directives
Date: Fri, 14 Feb 2020 13:08:53 +0000


--- Comment #5 from Jan Beulich <jbeulich at suse dot com> ---
(In reply to H.J. Lu from comment #4)
> (In reply to Jan Beulich from comment #3)
> > (In reply to H.J. Lu from comment #2)
> > > Is SSE2 a prerequisite for AVX?
> > 
> > This can be viewed either way, I guess. The history of the ISA extensions
> > suggests it is. But functionally nothing except the XMM registers have any
> > overlap, I think.
> Why is AVX a prerequisite for AVX512?

The correlation is largely the same as the one between SSE* and AVX.

> > > For view point of assembly codes, enable MMX register without MMX ISA
> > > makes no sense. For example, emms is needed for proper MMX usage.
> > 
> > Not necessarily, one can certainly get away without (using 4 FFREEP in a
> > row).
> What purpose does it serve?

Well, I don't expect anyone would actively want to use it this way.

You are receiving this mail because:
You are on the CC list for the bug.

reply via email to

[Prev in Thread] Current Thread [Next in Thread]