Where to find detailed information about the algorithm type when using cublasGemmEx

Accelerated Computing GPU-Accelerated Libraries
2

It’s not public, other than what is in the cublas doc you linked. There isn’t another document to refer to, other than the cublas doc, to get information about cublas. If you have specific questions, you can ask them here, and/or you can request changes to the CUDA documentation by filing a bug.