The math_real package that is packaged with Sigasi HDT 1.x is a draft version of the IEEE standard. We cannot distribute the final version of this package due to IEEE's copyright requirements.

If you have a copy of the IEEE source files you can do the following as a workaround: You can remove the current IEEE library from your project's libraries and replace it with your own copy of those files.

• Sigasi 2.x users: Read about using your own IEEE packages.
• Sigasi HDT 1.0 users: More information is in the manual, chapter on VHDL Libraries