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for add sub you can add carry input or output which accounts for bit growth
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I will probably have to do this if I can't find a comparable block, as well as increase some input widths with extra 0's in the MSB slots. Since there are many instances of this in the design I am porting I was hoping for a comparable block, but I have not had success in finding one yet, figured I'd see if I was missing anything before going with this route.
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lpm_add_sub ? there is parallel_add IP. you can change width by typing you own.
https://www.altera.com/content/dam/altera-www/global/en_us/pdfs/literature/ug/ug_lpm_alt_mfug.pdf --- Quote End ---
PARALLEL_ADD looks like it only sums multiple values together (e.g. a+b+c+d...) and does not support signed values.
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