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

374 HP MLIB User’s Guide
F_SGEMVT/F_DGEMVT/F_CGEMVT/F_ZGEMVT Multiple matrix-vector multiply
Z REAL or COMPLEX array, minimum length
(N - 1) x |incz| + 1.
INCZ Increment for the array y. A vector z having component
z
i
, i = 1,..., n, is stored in an array Z() with increment
argument incw. If incw > 0 then z
i
is stored in
Z(1 + (i - 1) x incw). If incw < 0 then z
i
is stored in
Z(1 + (N - i) x |incw|). incw = 0 is an illegal value.
Output X Result of first matrix-vector multiplication and scaling
by β. Refer to “Purpose” on page 372 for details.
W Result of second matrix-vector multiply. Refer to
“Purpose” on page 372 for details.
x βA
T
yz+←
w αAx←