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Re: [PATCH] - Use of powerpc 64bit instructions in 32bit ABI
- From: Eric Botcazou <ebotcazou at libertysurf dot fr>
- To: David Edelsohn <dje at watson dot ibm dot com>
- Cc: Richard Henderson <rth at redhat dot com>,Ulrich Weigand <Ulrich dot Weigand at de dot ibm dot com>,Fariborz Jahanian <fjahanian at apple dot com>,ian at wasabisystems dot com,davem at redhat dot com,gcc-patches at gcc dot gnu dot org
- Date: Mon, 1 Dec 2003 17:16:25 +0100
- Subject: Re: [PATCH] - Use of powerpc 64bit instructions in 32bit ABI
- References: <20031024180709.GB27121@redhat.com> <200312011523.39714.ebotcazou@libertysurf.fr> <200312011546.hB1Fk6T26204@makai.watson.ibm.com>
> Any suggestion for the sanity checks you think would be
> appropriate?
I'd say:
(1) check that the size is not greater than a word,
(2) check that the rtx returned by gen_reg_rtx is really a REG,
(3) ideally, it would be nice to have a bit more control over the insns
emitted for the move, because it appears that emit_group_store can really do
scary things :-) But I don't know if this is really doable.
That said, the code may have been added for a specific pattern so the
suggestions above may of course be totally void.
--
Eric Botcazou