Usselmann, Rudolf

Floating Point Unit

The floating-point compare unit has the altb and blta output signals from the comparator swapped. It sets altb to 1 when b is less than a. It sets blta to 1 when a is less than b.

Quick to Fix Error in Floating-Point Compare

After synthesizing your design with Synplify and Design Compiler, both tools reported of a combinational timing loop in post_norm stage.  Although, they still synthesized the design, some advanced timing features in these tools refuse to deal with a timing loop (such as balance_register feature in Design Compiler).  Timing loops in general is not a good idea, and if you ever plan on modifying your code, I would recommend removing the loop.  

Also, overall, I'd like to see the code slightly better documented in the code itself, better pipelining (or rather more clear) and perhaps break up stages (such as post_norm) into smaller modules.

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Floating Point Unit