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Altera_Forum
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15 years ago

need help to design calculator function (addition and multiplication)

i need to design calculator that performs operations of addition and multiplication of 2 input (5-bit binary) that representing signed decimal numbers (range, -16 to + 15). I've already done the codi...
Altera_Forum's avatar
Altera_Forum
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15 years ago

A simple numerical example:

-10 * 15 = -150

in signed binary you get

10110 * 01111 = 1101101010

to convert to BCD, you would invert negative numbers first

+150 0010010110

then apply BCD decoding

150/100 = 1

150/10%10 = 5

150%10 = 0