HP MLIB User's Guide Vol. 1 7th Ed.

124 HP MLIB User’s Guide
SROTM/DROTM Apply modified Givens rotation
incx < 0 x is stored backward in array x; that
is, x
i
is stored in x((i−n)×incx+1).
Use incx = 1 if the vector x is stored contiguously in
array x; that is, if x
i
is stored in x(i). Refer to “BLAS
Indexing Conventions” in the introduction to this
chapter.
y Array of length leny = (n−1)×|incy|+1 containing the
n-vector y.