Implementation of Mixed Precision Sparse Matrix Solving in the Large Scale Circuit Transient Simulation

We implement mixed precision sparse matrix solver in the transient simulation of analog circuits. In each time step, we need to perform one single precision LU factorization and a few steps of mixed precision iterative refinement. The overall time benefit of mixed precision sparse matrix solver is 10% compared to double precision sparse matrix solver. The sparsity of the matrix plays a significant role in improving the performance of mixed-precision computation.