BiCGSTAB: set default guess to 0, and improve restart mechanism by recomputing the accurate residual.
BiCGSTAB: set default guess to 0, and improve restart mechanism by recomputing the accurate residual.

ROCmSoftwarePlatform/hipeigen,ROCmSoftwarePlatform/hipeigen,ROCmSoftwarePlatform/hipeigen,ritsu1228/eigen,ritsu1228/eigen,ritsu1228/eigen,pasuka/eigen,ritsu1228/eigen,TSC21/Eigen,pasuka/eigen,TSC21/Eigen,TSC21/Eigen,ritsu1228/eigen,pasuka/eigen,ROCmSoftwarePlatform/hipeigen,pasuka/eigen,TSC21/Eigen,pasuka/eigen