lezah said:
Hi, I am using Maxplus II, but when I include this "use
ieee.numeric_std.all" in my code,
it has the following error message:
Library error: primary unit "numeric_std" denoted by prefix "IEEE"
must exist in the library.
This is a limitation of MaxPlus+II, and several other
manufacturer-specific tools of the same era.
You can't add the package even if you had the source
code, because the synthesis tool needs to have the
library built-in for performance reasons.
However, you should find that you can
use ieee.std_logic_arith.all;
instead. This library was the predecessor of numeric_std
and basically works in the same way (new types SIGNED and
UNSIGNED; operators "+", "-", "<" etc) but the conversion
functions have different names:
numeric_std std_logic_arith
================================
to_integer conv_integer
to_(un)signed conv_(un)signed
resize extend
I'm not sure whether std_logic_arith.extend has the same
functionality as numeric_std.resize - I would need to
look that up, and it's the end of Friday, so I
can't be bothered
--
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