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

180 HP MLIB User’s Guide

F_SGEN_JROT/F_DGEN_JROT/F_CGEN_JROT/F_ZGEN_JROT Generate Jacobi rotation

Input JROT Speciﬁes whether the Jacobi rotation generated is

OUTER, INNER, or SORTED. The following are valid

options:

• BLAS_INNER_ROTATION

• BLAS_OUTER_ROTATION

• BLAS_SORTED_ROTATION

X REAL scalar. X is replaced by A on exit.

Y REAL or COMPLEX scalar. Y is unchanged on exit.

Z REAL scalar. Z is replaced by B on exit.

Output A REAL scalar. Replaces the input X.

B REAL scalar. Replaces the input Z.

C REAL cosine used to apply the Jacobi rotation.

S REAL or COMPLEX sine used to apply the Jacobi

rotation.