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Altera_Forum
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11 years ago

Bit widths for addition

Hi, I am trying to write a pipelined adder for a filter design. all the gaussianPixels are 8 bits wide. gaussianPartialSum0 <= ("00" & gaussianPixels(0)) + ('0' & gaussianPixels(3) & '0') ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Yes - that should work.

the numeric_std has a resize function that will get the correct size for you (though not append bits at the LSB) and if using the signed type, will sign extend the value.