The MPACK; Multiple precision arithmetic BLAS (MBLAS) and LAPACK (MLAPACK). The MPACK is a free library for arbitrary/higher precision linear algebra. It consists of MBLAS and MLAPACK, multiple precision arithmetic versions of BLAS and LAPACK, respectively. It supports various multiple precision arithmetic libraries like GMP, MPFR, and QD, as well as IEEE 754 binary128 (via gcc’s extension __float128) .