[PATCH] sh4: use optimized asm version of memcpy - add config option to support backward copying

[Carmelo AMOROSO]

Carmelo AMOROSO wrote:
> Hi All,
> I'm currently using on uClibc-nptl for sh4 an optimized version
> of the memcpy function (from Stuart Menefy @STMicroelectronics).
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snippet
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The attached patch needs to be applied on top of the previous one to fix 
a build problem
into uClibc trunk due to the lack of ENTRY macro; sorry for that.

Best regards,
Carmelo

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