This is a partial port from CLAPACK
isamax, sasum, saxpy, scopy, sdot, sgemm, sgemv, sger, slaswp, sscal, sswap, stbsv, strmm, strmv, strsm, strsv
i_nint, ilaenv, iparmq, lsame, sgbsv, sgbtf2, sgbtrf, sgbtrs, sgetf2, sgetrf, sgetrs, sgetri, sgtsv, slabad, slacn2, slamc1, slamc2, slamc3, slamc4, slamc5, slamch, slange, slassq, srscl, strti, strti2