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This patch adds the memmove fuction for SH4.
By default, it used the generic implementation.
This new code uses the memcpy for BWD copies and implements FWD copy
when required (see comment within the code itself).
The idea behind is to get advantage of using the optimised memcpy for SH4
and use the FPU for FWD copies (for big sizes) as well.
LMBench bw_mem test showed a significant improvement on uClibc because bcopy
invokes memmove, directly.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
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