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Re: Deprecating ARM FPA support
- From: "Joseph S. Myers" <joseph at codesourcery dot com>
- To: Joel Sherrill <joel dot sherrill at oarcorp dot com>
- Cc: Richard Earnshaw <rearnsha at arm dot com>, Martin Guy <martinwguy at gmail dot com>, Mark Mitchell <mark at codesourcery dot com>, "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>, "pedro at codesourcery dot com" <pedro at codesourcery dot com>, Nathan Sidwell <nathan at codesourcery dot com>, "ljrittle at acm dot org" <ljrittle at acm dot org>, "ralf dot corsepius at rtems dot org" <ralf dot corsepius at rtems dot org>, "thorpej at netbsd dot org" <thorpej at netbsd dot org>, "krister dot walfridsson at gmail dot com" <krister dot walfridsson at gmail dot com>
- Date: Mon, 24 May 2010 11:50:03 +0000 (UTC)
- Subject: Re: Deprecating ARM FPA support
- References: <AANLkTimkz9SCy1XXHOsduUsboMv-yi4DYFxkCljPdCqO@mail.gmail.com> <1274689403.17090.23.camel@e102346-lin.cambridge.arm.com> <Pine.LNX.4.64.1005241112020.14000@digraph.polyomino.org.uk> <4BFA65C4.6060402@oarcorp.com>
On Mon, 24 May 2010, Joel Sherrill wrote:
> The question we would like answered is what impact this
> has on our code base. What changes will we have to
> make to accomodate this? Register usage changes, stack
> frame changes, etc.
For ARM Linux, one change was dealing with __arm__ conditionals in code
that related to the peculiarities of OABI structure layout - EABI is much
more conventionally like other architectures in that regard. I don't know
whether that will apply to RTEMS (as I'm not familiar with the details of
the various old ABIs).
--
Joseph S. Myers
joseph@codesourcery.com