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RE: Regarding addition of SH4A support in SH port
- From: <tm_gccmail at kloo dot net>
- To: Andrew STUBBS <andrew dot stubbs at st dot com>
- Cc: 'Anil Paranjape' <AnilP1 at KPITCummins dot com>, aoliva at redhat dot com,gcc-patches at gcc dot gnu dot org
- Date: Fri, 11 Mar 2005 18:26:27 -0800 (PST)
- Subject: RE: Regarding addition of SH4A support in SH port
On Mon, 21 Feb 2005, Andrew STUBBS wrote:
> > We have some observations about SH4A specific instructions.
> > We could only test following SH4A specific instructions with
> > test cases added in test suite,
> > "fsca"
> > "fsrra"
>
> These two instructions are not SH4a specific. If the compilers thinks they
> are then it is wrong and we should do something about it.
This isn't entirely true.
These two instructions were developed for a specific customer of the
SH7750, and are tested on the SH7750.
They do exist on the other SH4s, such as the SH7751, SH7760, SH7761, etc
but I don't think they are fully tested on these implementations.d
Therefore, using these instructions on other SH4 variants is risky at
best.
Toshi