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Re: [PATCH] PPC64: First in the series of patches implementing POWER8 vector math.
- From: GT <tnggil at protonmail dot com>
- To: "libc-alpha at sourceware dot org" <libc-alpha at sourceware dot org>
- Date: Tue, 19 Feb 2019 17:43:32 +0000
- Subject: Re: [PATCH] PPC64: First in the series of patches implementing POWER8 vector math.
- References: <nN0kG0GXbx7wYro2oE34bwvcauTJw_WuDyP-obLhVMc-zwTK071-mQXBD8hiITyOHI6WoxiwvNezhvebbsjFnNlAk8mCi5yX6NYpge4SAasemail@example.com> <alpine.DEB.firstname.lastname@example.org>
- Reply-to: GT <tnggil at protonmail dot com>
> Please include the patch description in the body of your message, not just
> in an attachment - "Empty Message" isn't helpful. When sending multiple
> patch versions, it's very helpful to describe what has changed since the
> previous version (after a "---" line or some other such indication,
> accepted by "git am", that the following text is not intended as part of
> the commit message).
The next patch sent will have a description of differences from the one we
> I think you need to have explicit buy-in from powerpc toolchain
> maintainers that the ABI you have chosen is the desired one for this
> purpose, agreed for use by any toolchain that wishes to be able to use
> this functionality.
Tulio and/or Bill:
Can you confirm that the POWER8 Vector Function ABI will match the
SSE ISA sections of x86_64 Vector Function ABI?
>Please also confirm the GCC version that implements
> the ABI in question (when given the pragmas / attributes in the header you
> add). To be clear, this information should be part of the commit message
> (in every version of the patch submission), not just in a one-off reply to
> this message.
Patches going foward will include information on the minimum GCC version
required for POWER8 libmvec.
Tulio and/or Bill:
Please affirm my understanding that at present GCC does NOT
yet implement the Vector Function ABI for POWER8.
> Please also reference somewhere other than Google Groups for the ABI (both
> principles, and because Google Groups has a history of breaking URLs that
> used to work for linking to messages, so somewhere with a more reliably
> stable URL is important). The glibc wiki has a copy of the x86_64 ABI at
Next patch will replace link to google groups with the glibc url you've
> Please describe in patch submissions how the patch was tested. In this
> case, running at least the libm tests for both powerpc64 big-endian and
> powerpc64 little-endian, and verifying there are no failures, would seem
Testing will be described all patches.
Remaining issues you raised will be answered shortly.