laln2: 1x1 or 2x2 solve, step in trevc

Collaboration diagram for laln2: 1x1 or 2x2 solve, step in trevc:

Functions
subroutine	dlaln2 (ltrans, na, nw, smin, ca, a, lda, d1, d2, b, ldb, wr, wi, x, ldx, scale, xnorm, info)
	DLALN2 solves a 1-by-1 or 2-by-2 linear system of equations of the specified form.
subroutine	slaln2 (ltrans, na, nw, smin, ca, a, lda, d1, d2, b, ldb, wr, wi, x, ldx, scale, xnorm, info)
	SLALN2 solves a 1-by-1 or 2-by-2 linear system of equations of the specified form.

Detailed Description