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Altera_Forum's avatar
Altera_Forum
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14 years ago

Adding and resizing in one step

Hi, Is there a way to add two unsigned numbers and extract only the x most significant bits from it in one step? I want something like this: sum <= resize(number1 + number2,4) In...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

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but this works even nicer :

sum <= unsigned( number21 + number22 )(7 downto 4) ;

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I have two problems with this construct

- it doesn't refer to a defined VHDL syntax as far as I'm aware of

- it leaves sum unconnected in Quartus V9.0, without generating an error