larrr: step in stemr, test to do expensive tridiag eig algorithm

Functions
subroutine	dlarrr (N, D, E, INFO)
	DLARRR performs tests to decide whether the symmetric tridiagonal matrix T warrants expensive computations which guarantee high relative accuracy in the eigenvalues. More...
subroutine	slarrr (N, D, E, INFO)
	SLARRR performs tests to decide whether the symmetric tridiagonal matrix T warrants expensive computations which guarantee high relative accuracy in the eigenvalues. More...

Detailed Description