The libraries distributed here
http://software-dl.ti.com/dsps/dsps_public_sw/c6000/web/c67_fastmath/latest/index_FDS.html
in c67xmathlib_2_01_00_00/lib
do not include entry points for _exp and _log10.
The included documentation c67xfastRTS_user_guide.pdf states that exp and log10 are included. Previous versions of the library included them.