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Re: [PATCH] PPC64: First in the series of patches implementing POWER8 vector math.
- From: Tulio Magno Quites Machado Filho <tuliom at ascii dot art dot br>
- To: GT <tnggil at protonmail dot com>, "libc-alpha\@sourceware.org" <libc-alpha at sourceware dot org>
- Cc: William J. Schmidt <wschmidt at linux dot ibm dot com>
- Date: Tue, 19 Feb 2019 16:32:21 -0300
- Subject: Re: [PATCH] PPC64: First in the series of patches implementing POWER8 vector math.
- References: <nN0kG0GXbx7wYro2oE34bwvcauTJw_WuDyP-obLhVMc-zwTK071-mQXBD8hiITyOHI6WoxiwvNezhvebbsjFnNlAk8mCi5yX6NYpge4SAas=@protonmail.com> <alpine.DEB.2.21.1902190117000.480@digraph.polyomino.org.uk> <M1qlF7fGpN06Xx6e3E95nc0vCTdxBwFVZPBUlrOY0W2csiUK5xVMpESjoTYj-ZQmyS6ywft00dJ5YKSeF6r56uMAUDM626Msu3eN2Dn-vAA=@protonmail.com>
GT <tnggil@protonmail.com> writes:
>> 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?
Not yet.
We need to clarify the concerns that have been raised in your previous thread:
https://www.sourceware.org/ml/libc-alpha/2019-02/msg00455.html
We can only confirm the ABI after having answers to all those questions.
>>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.
>
> However:
>
> Tulio and/or Bill:
> Please affirm my understanding that at present GCC does NOT
> yet implement the Vector Function ABI for POWER8.
That's correct.
--
Tulio Magno