MB_DGER – Performs A := alpha*x*y^T + A

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Function Description
The output references yX, yY and yA are always set to the corresponding input references uX, uY and uA. If HLD = on then nothing is computed otherwise the BLAS function DGER is called internally:

DGER(M, N, alpha, uX, INCX, uY, INCY, uA, LDA);

where parameters of DGER are set in the following way:

• M is number of rows of the matrix referenced by uA.
• N is number of columns of the matrix referenced by uA.
• If the input $\mathtt{\text{incx}}\ne 0$ then INCX is set to incx else INCX is set to $1$.
• If the input $\mathtt{\text{incy}}\ne 0$ then INCY is set to incy else INCY is set to $1$.
• LDA is the leading dimension of matrix referenced by uA.

The error flag E is set to on if:

• the reference uX or uY or uA is not defined (i.e. input uX or uY or uA is not connected),
• the call of the function DGER returns error using the function XERBLA, see the system log.

See BLAS documentation [6] for more details.

Inputs

 uX Input reference to vector x Reference uY Input reference to vector y Reference uA Input reference to matrix A Reference incx Index increment of vector x  $\odot$0.00E+00 Long(I32) incy Index increment of vector y  $\odot$0.00E+00 Long(I32) alpha Scalar coefficient alpha  $\odot$0.0 Double (F64) HLD Hold Bool

Outputs

 yX Output reference to vector x Reference yY Output reference to vector y Reference yA Output reference to matrix A Reference E Error indicator Bool

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