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Re: [RFC] PPC64: Vector Function ABI for Power Architecture
- From: GT <tnggil at protonmail dot com>
- To: "wschmidt at linux dot ibm dot com" <wschmidt at linux dot ibm dot com>
- Cc: Tulio Magno Quites Machado Filho <tuliom at ascii dot art dot br>, "libc-alpha\\\\@sourceware.org" <libc-alpha at sourceware dot org>
- Date: Fri, 22 Nov 2019 20:58:10 +0000
- Subject: Re: [RFC] PPC64: Vector Function ABI for Power Architecture
- References: <wPERt215D-5nDcvX4C8slNfToWfXI0K2WFmVl_oQgFfnYPaj4U-LPx2qmV9IV3AzccF8fv3wXR4T9X3hqNgtE2RZSrM_5dUkPZtVhieBGtE=@protonmail.com> <8736ef3bcj.fsf@linux.ibm.com> <24bf1231-c804-b3bc-f4e4-3546e52a3a90@linux.ibm.com>
- Reply-to: GT <tnggil at protonmail dot com>
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Friday, November 22, 2019 3:34 PM, Bill Schmidt <wschmidt@linux.ibm.com> wrote:
> On 11/22/19 2:27 PM, Tulio Magno Quites Machado Filho wrote:
>
> > GT tnggil@protonmail.com writes:
> >
> > > 1. The document is hosted at URL: https://github.com/power8-abi-doc
> > > 2. Bill Schmidt, cc'ed here, is the IBMer ultimately responsible for the document.
> > >
> > > The pdf does not render quite right - so for feedback regarding visual presentation of the document, first download the html and open it in a browser. Please use the ABI's rendering in a browser as the basis for any recommendations on its formatting.
> > > In section "Vector Function Name Mangling", I'm afraid we can't leave the <isa>
> > > with an entry as generic as VSX.
> >
> > There are VSX instructions included in ISA 3.0 that will not execute in ISA
> > 2.07. So, I think we need 2 <isa> entries there:
> >
> > 1. ISA 2.07, which is the minimum ISA required in this document.
> > 2. ISA 3.0
>
We have not used any instructions introduced in ISA 3.0. Can I simply have a single
entry indicating ISA 2.07? Or should it be ISA 2.07+ (i.e. ISA at or above v2.07)?
Or do we still really need 2 separate entries?
Thanks.
Bert.