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

 

 

zi, i = 1,..., n, is stored in an array Z() with increment

 

 

argument incw. If incw > 0 then zi is stored in

 

 

Z(1 + (i - 1) x incw). If incw < 0 then ziis 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.

 

 

x ← β AT y + z

 

 

W

Result of second matrix-vector multiply. Refer to

 

 

“Purpose” on page 372 for details.

w ← αAx

374HP MLIB User’s Guide