VHDL-2008 is finally getting some traction.   What started out as just a fixed and floating point package got merged into the largest addition to the VHDL language since it was started.   On this page you will find definitions of the functions available in the VHDL-2008 libraries. You will also find VHDL-93 compatible code for those that do not yet have access to VHDL-2008 compilers.

The VHDL-2008 packages will be included in your vendor's environment. In some cases I have found that they may be encrypted due to IEEE rules. The packages available on this page are NOT the released packages, but VHDL-93 versions of those packages, which I published BEFORE the release of the LRM. They are free of copyright restrictions, and may be used for whatever purpose is needed.

VHDL-93 versions of the VHDL-2008 packages

• Additions to std.standard standard_additions_c.vhdl (user's guide)
• New package std.env env_c.vhdl
• Additions to std.textio standard_textio_additions_c.vhdl (user's guide)
• Additions to ieee.std_logic_1164 std_logic_1164_additions.vhdl (user's guide)
• Additions to ieee.numeric_std numeric_std_additions.vhdl (user's guide)
• New package numeric_std_unsigned numeric_std_unsigned_c.vhdl (user's guide)
• New package fixed_float_types fixed_float_types_c.vhdl
• New package fixed_pkg fixed_pkg_c.vhdl (Fixed Point user's guide)
• New package float_pkg float_pkg_c.vhdl (Floating Point user's guide)
• ZIP file of all the packages

I use this code in most of my designs. Many times I find that I have to modify the code slightly in some tools, so I made this list. Included in the "source code" section for each tool is source code specifically debugged for that particluar tool. Click on the "documentation" link to see what changes I had to make, and how to use this code in the specific tool.

Some helpful code to go with these packages: