How to use cuda fast math functions in integrands of pagani?

[f1974939505]

My integrands may contain many basic functions, such as exp and sin. I want to replace them with Cuda fast math functions to speed up the integration. If I define the integrand on host device, Cuda fast math functions will not be available for them. However, if I define the integrand only on device, the integrand may not be available for Pagani.