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Altera_Forum's avatar
Altera_Forum
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14 years ago

sfixed to ufixed conversition

Hi all; I have learn about ufixed and sfixed operation. I want to convert -0.129 to sfixed using the code below and its has no problem; signal n1: ufixed (4 downto -4); ... out_A <= ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

you cant really do that, because ufixed is unsigned fixed, and sfixed is signed fixed.

Therefore, using a ufixed to size an sfixed is not appropriate. and direct conversion from sfixed to ufixed would be innapropriate without an abs function.

so, dont put signed numbers into ufixed. Keep them sfixed.