MB_DSWAP – Interchanges two vectors

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 DSWAP is called internally:

DSWAP(N, 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 CNTX referenced by uX.
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,
$(N - 1) * |INCX| + 1 > CNTX$ ,
$(N - 1) * |INCY| + 1 > CNTY$ , where CNTY is a number of the vector or matrix elements referenced by uY.

See BLAS documentation [10] for more details.

This block does not propagate the signal quality. More information can be found in the 1.4 section.

Input

uX	Input reference to vector x	Reference
uY	Input reference to vector y	Reference
n	Number of processed vector elements	Long (I32)
incx	Index increment of vector x	Long (I32)
incy	Index increment of vector y	Long (I32)
HLD	Hold	Bool

Output

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

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