On Tue, Feb 05, 2008 at 09:38:20AM -0600, Josh Boyer wrote:
> Taking a step back though, there will always be odd cases like this as
> we move forward. Toolchain XXX will eventually not support instruction
> YYYY which will eventually be used, etc. I'll try to make this
> specific case work because it's scope is quite limited. But this
> problem as a whole will still remain.
Worst case, if it's only a couple of instructions, they could be covered
the way we usually handle new instructions in the ISA: make a macro for
them and hand-encode them.
See real_205_{read,write}b() in arch/powerpc/kernel/misc_64.S for
example.
-Olof
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