Most Efficient/Fastest Boolean Bit Packing Methods on RT

[arevh]

Hi GerdW,

It is a subVI, so the Booleans are combined into a cluster, to access them from top level VI, and not to have many terminals on the connector pane.

Thanks,

Arev

CTO | RAFA Solutions

[GerdW]

Hi arev,

an U8 also requires just one connector in the pane and all bits can be accessed either by boolean operations (AND with mask) or by NumberToBoolArray with IndexArray (a NOP on the FPGA)…

[arevh]

Actually this thread has started from that point. Indexing array consumes more area on the FPGA, than Rotate operation, as showed my tests. That's why I use Rotate operation to get or insert bits of U8. And out of the subVI I need not the U8, but the separate U8 bits.

Thanks,

Arev

CTO | RAFA Solutions

[GerdW]

Hi arev,

which LabVIEW version do you use?

Can you supply metrics for your statement?

The documents on NI.com say: NumToBoolArray and IndexArray on a boolean array are "for free"…

[arevh]

Mentioned results are from one of my old projects, which was implemented using LV12. I was using NI sbRIO-9606 as a hardware platform.

Unfortunately I can't provide now the metrics, as I haven't saved them. 

Thanks,

Arev

CTO | RAFA Solutions