Improve rotate. Use the naive implementation for dim of size 64 and 128.
Achieve desired 1.4 mean result.

Rotate: Version = rotate: Current working version:
Dim             64      128     256     512     1024    Mean
Your CPEs       3.7     4.1     6.5     7.0     21.2
Baseline CPEs   3.7     4.1     12.2    13.7    26.0
Speedup         1.0     1.0     1.9     1.9     1.2     1.4