MB_DAXPY – Performs y := a*x + y for vectors x,y

Block SymbolLicensing group: STANDARD

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

DAXPY(N, a, uX, INCX, uY, INCY);

where the values N, INCX and INCY are set in the following way:

If the input $n > 0$ then N is set to n else N is set to the current number of the vector or matrix elements CNTY referenced by uY.
If the input $incx \neq 0$ then INCX is set to incx else INCX is set to $1$ .
If the input $incy \neq 0$ then INCY is set to incy else INCY is set to $1$ .

The error flag E is set to on if:

the reference uX or uY is not defined (i.e. input uX or uY is not connected),
$n < 0$ ,
$(N - 1) * |INCX| + 1 > CNTX$ , where CNTX is a number of the vector or matrix elements referenced by uX,
$(N - 1) * |INCY| + 1 > CNTY$ .

See BLAS documentation [6] for more details.

Inputs

uX	Input reference to vector x	Reference
uY	Input reference to vector y	Reference
a	Scalar coefficient a	Double (F64)
n	Number of processed vector elements $⊙$ 0.00E+00	Long(I32)
incx	Index increment of vector x	Long (I32)
incy	Index increment of vector y	Long (I32)
HLD	Hold	Bool

Outputs

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

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