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Editorial Team
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Asked: 2026-05-31T00:19:39+00:00

I have a query on selection of method to extract a byte from the

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I have a query on selection of method to extract a byte from the word. My word is currently unsigned. It is simply collection of 32 bits.(1s and 0s). Both the follwing script I implement returns me same result. I wonder which is a better option to select.

Bytes0=(UINT8)((Word>>00 & 0x0000FF);
Bytes1=(UINT8)(Word>>08  & 0x0000FF);
Bytes2=(UINT8)(Word>>16  & 0x0000FF);
Bytes3=(UINT8)(Word>>24  & 0x0000FF);

or
Bytes0=(UINT8)((Word>>00);
Bytes1=(UINT8)(Word>>08 );
Bytes2=(UINT8)(Word>>16 );
Bytes3=(UINT8)(Word>>24 );

Am I missing something?

Thanks
DSP Guy

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1 Answer

  1. Editorial Team

    The cast to UINT8 is discarding all the bytes except for the lowest one. So in the first case, you convert the upper bytes to 0 and then discard them; in the second you simply discard them. The second option is clearly more efficient, assuming you are assigning to a UINT8.

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