I just received my HiFive board today and after downloading and compiling the SDK I saw that there already where 2 benchmarks as examples. The coremark and the dhrystone benchmark.
To add another one, I ported the whetstone benchmark to the HiFive board, I managed to get 12.3MIPS on the double precision whetstone test.
My code can be found here, in theory just cloning it in the software directory of the SDK should be enough.
If someone sees any mistakes or ways to speed it up, I’d love to hear that.