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From: Segher Boessenkool <segher@kernel.crashing.org>
Subject: Re: 440 ebony patch seems to have broken 85xx build on powerpc.git
Date: Fri, 25 May 2007 16:01:28 +0200
To: David Gibson <david@gibson.dropbear.id.au>
Cc: linuxppc-dev@ozlabs.org, Arnd Bergmann <arnd@arndb.de>
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>> No, those options _do_ work on 440, but the -mbooke
>> assembler flag disallows isel (since it is an optional
>> insn).
>
> But not on 440GP, which is what Ebony is.

I meant it is an optional insn in the arch.

-mcpu=440 doesn't enable isel, anyway; only -mcpu=e500
does in any FSF GCC release as far as I can see.


Segher