Using openARC for CUDA GPUs

matmul OpenACC-CUDA example:

export OMP_NUM_THREADS=2

./matmul_CUDA 

Number of OpenMP threads 2

CPU Elapsed time = 0.181340 sec

Accelerator Elapsed time (CUDA) = 0.006136 sec

Accelerator Elapsed time (OpenACC) = 0.006496 sec

Verification Successful err = 0.000000e+00