[linuxsh-dev] Fixup for the fast SH4 memcpy

[David M. <da...@sn...>]

Hi all,

I found a bug today in the fast SH4 memcpy that Stuart Menefy graciously
wrote for us :-).

Under some situations it was running off the front of the destination buffer
and trashing things.  The case I found was running off the front of the
destination by 8 bytes:

	memcpy(0x881f7cdc, aligned-src, 64)

Attached is a patch,  and the changed original just in case.  I would
appreciate any feedback on the correctness/speed implications.  I ran
it through an extensive alignment/boundary case test without any problems
and it fixed my original crash :-)

Cheers,
Davidm


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