target-ppc: Optimize rlwinm MB=0 ME=31
Optimize the special case of rlwinm where MB=0 and ME=31. This can be implemented as a 32-bit ROTL. Signed-off-by: NTom Musta <tommusta@gmail.com> Suggested-by: NRichard Henderson <rth@twiddle.net> Reviewed-by: NRichard Henderson <rth@twiddle.net> Signed-off-by: NAlexander Graf <agraf@suse.de>
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