Vectorizing the forward mode of ADOL-C on a GPU ... - Autodiff.org

. K. Kulshreshtha, A. Koniaeva 9 / 13 <strong>Vectorizing</strong> <strong>ADOL</strong>-C using CUDA Euro AD 10.06.2013Implementation.Implementation• namespace adtlc encapsulates <strong>the</strong> implementation• class adtlc::adouble analoguous to scalar traceless <strong>forward</strong>• Member functions and operators are annotated __device__ toindicate callablity inside GPU kernels• Evaluation routine using adtlc::adouble objects is completelyanaloguous to traceless CPU based implementation• GPU kernel function can have a signature like__global__ void kernel_func(double* inx, size_t n,double* outy, size_t m, double* dery);• The annotation __global__ indicates that all GPU threads have accessto this code, and <strong>the</strong> distribution (blocks,threads) must be specified