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Altera_Forum
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15 years ago

Multiplier and Divider

I am new to the forum, but not VHDL. I am a student at RIT and have taken classes and am very familiar with the language. The questions I have are more of what should my hardware multiplier and divid...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

The LPM_Mult is what I looked at. If you are multiplying two 32 bit numbers, and the output is restricted to 32 bits, all numbers that have bits above the 32 bit limit will require an overflow detection. For example if you multiply FFFFFFFF * FFFFFFFF, the result will be FFFFFFFE00000001, which exceeds the limit and will not fit on a 32 bit output bus.