can not find the document of cudafuncs.cu

[Xinkai Jiang]

Hello, I am a freshman of this field, and I am looking into your excellent work which really inspired me. I hope I can learn more detail of your code, I find a lot of annotation in most of code, but the file'cudafuncs.cu' and 'cudafuncs.cuh' have few annotation. Could write some note to tell us a little bit thing about what purpose of these function in 'cudafuncs.cu'. Thanks a lot!