ICSI log 0.6 Beta

ICSI log is a fast logarithm C code implementation which contains a C implementation of the ICSI logarithm function. ICSI log implements a fast single precision approximation of the natural logarithm with adjustable accuracy.

The function uses bit level operations and a look up table of adjustable size. The accuracy is defined by the table size. However, the execution speed of the logarithm reduces as the table grows and does not fit into the cache anymore.