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I am looking at the
Intel® Arria® 10 Native Fixed PointDSP IP Core User Guide ug-011632017.03.13 https://www.altera.com/content/dam/altera-www/global/en_us/pdfs/literature/ug/ug_nfp_dsp.pdf On page 14, it indicates the equation for the 18x18 Sum of 2 mode is resulta =[±(ax * ay) + (bx * by)] Looking at the block diagram in Figure 3, I think it should be: resulta =[±(ax * (ay ± az)) ± (bx * (by ± bz))] Is that correct, or is there an error in the block diagram? Also, what is the significance of white blocks or dotted blocks in the block diagram? For instance, does the negate function exist in this mode (it is white)? Thanks
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Hi,
Equation in user guide is when preadder is disabled. If you enable preadder out equation will be [±(ax * (ay ± az)) ± (bx * (by ± bz))]. Best Regards, Anand Raj Shankar (This message was posted on behalf of Intel Corporation)- Mark as New
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Thanks for the clarification.
Also, what is the significance of white blocks or dotted blocks in the block diagram?
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