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Altera_Forum
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13 years ago

Subtraction with numeric_Std doesn't work

Hello What am i doing in wrong in the code below. subtraction doesn't work! I am using numeric_std and the numbers are in twos complement format. // mattgust library ieee; use ieee....
Altera_Forum's avatar
Altera_Forum
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13 years ago

Just curious, why use this complicated overflow detector. All you need just extend your addition or subtraction result by 1 bit then you can check if there is overflow or not in all cases if bit(8) /= bit(7). Or am I missing something?