Re: [PATCH] ARM: do not assemble iwmmxt.S with LLVM toolchain

From: Nick Desaulniers <ndesaulniers@google.com>
To: Russell King - ARM Linux admin <linux@armlinux.org.uk>
Cc: Linus Walleij <linus.walleij@linaro.org>,
	Peter Smith <Peter.Smith@arm.com>, Stefan Agner <stefan@agner.ch>,
	David Howells <dhowells@redhat.com>,
	Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
	Manoj Gupta <manojgupta@google.com>,
	Benjamin Gaignard <benjamin.gaignard@linaro.org>,
	"Joel Fernandes (Google)" <joel@joelfernandes.org>,
	Jian Cai <caij2003@gmail.com>,
	Bartosz Golaszewski <bgolaszewski@baylibre.com>,
	Ilie Halip <ilie.halip@gmail.com>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Krzysztof Kozlowski <krzk@kernel.org>,
	Ard Biesheuvel <ardb@kernel.org>,
	clang-built-linux <clang-built-linux@googlegroups.com>,
	Sami Tolvanen <samitolvanen@google.com>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	Arnd Bergmann <arnd@arndb.de>,
	"Steven Rostedt (VMware)" <rostedt@goodmis.org>,
	Jian Cai <jiancai@google.com>,
	Doug Anderson <armlinux@m.disordat.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Patrick Bellasi <patrick.bellasi@arm.com>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Tejun Heo <tj@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH] ARM: do not assemble iwmmxt.S with LLVM toolchain
Date: Wed, 4 Nov 2020 12:44:04 -0800	[thread overview]
Message-ID: <CAKwvOd=6chv+goJ1-8RhcMmUPSU4OMwMWVmvkHO8yxgmHiLKyw@mail.gmail.com> (raw)
In-Reply-To: <20200413210049.GQ25745@shell.armlinux.org.uk>

On Mon, Apr 13, 2020 at 2:01 PM Russell King - ARM Linux admin
<linux@armlinux.org.uk> wrote:
>
> On Mon, Apr 13, 2020 at 12:23:38PM -0700, Nick Desaulniers wrote:
> > On Fri, Apr 10, 2020 at 5:33 AM Russell King - ARM Linux admin
> > <linux@armlinux.org.uk> wrote:
> > >
> > > For older CPUs, it doesn't matter what the latest ARM ARM says, the
> > > appropriate version of the ARM ARM is the one relevant for the CPU
> > > architecture.  This is a mistake frequently made, and it's been pointed
> > > out by Arm Ltd in the past (before ARMv6 even came on the scene) that
> > > keeping older revisions is necessary if you want to be interested in
> > > the older architectures.
> >
> > As if it never existed *waves hands*.  Interesting.  Does ARM still
> > distribute these older reference manuals? Do you keep copies of the
> > older revisions?
>
> I keep copies of every document I've needed that I'm allowed to keep
> as a general rule, including the early paper copies of the ARM
> architecture reference manual. I even have the original VLSI ARM2
> databook.
>
> For the ARMv5TE architecture, you're looking for DDI0100E which can be
> found via google.

Russell, Arnd found
http://read.pudn.com/downloads78/ebook/297953/WirlessMMX251669_devguide.pdf
"Intel Wireless MMX Technology - Developer Guide - August, 2002".

I thought you might be interested in fetching a copy for historical reference.
-- 
Thanks,
~Nick Desaulniers