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Altera_Forum
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12 years ago

Instantiating LPM Functions in VHDL: parallel adder

Hello guys... I'm trying instatniating some altera MF directly in my top design. From what I have understand I have two use two libraries: library altera_mf; use altera_mf.altera_mf.c...
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Altera_Forum
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12 years ago

Thank you tricky.

From the lpm_guide I see that cout is defined as:

Carry-out (borrow-in) of the most significant bit (MSB). The cout port has a physical interpretation as the carry-out (borrow-in) of the MSB. The cout port detects overflow in UNSIGNED operations. The cout port operates in the same manner for SIGNED and UNSIGNED operations.

I can't really understand it very much.. Is that similar to say:

dataa+datab == [cout dataout] ?