Call *rot to perform eigenvector update of *steqr #1120
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Call *rot instead of *lasr to perform eigenvector update of *steqr to fully utilize blas subroutines.
Code equivalence is verified with norm$\Vert{A-ZDZ^T}\Vert_2$ . Entries is generated randomly.
Single Precision Case
Double Precision Case
Performance is measured in millisecond and shows an improvement. The platform is a Intel Xeon 1660 v3 @ 3GHz. As an additional test, we also measured the performance of subroutine *kteqr in PR #1049 .
Single Precision Case
Double Precision Case