README

The standard IEEE packages cannot be freely redistributed in source form.

Some libraries can be downloaded from the IEEE here:
  http://standards.ieee.org/downloads/1076/1076.2-1996/

Unfortunately the VITAL libraries are missing from the above location. However
draft versions can be found on the internet, for example here:
  http://tams-www.informatik.uni-hamburg.de/vhdl/index.php?content=06-models

The script tools/fetch-ieee.sh can automate downloading these for you.

The required files are:
  math_complex-body.vhdl
  math_complex.vhdl
  math_real-body.vhdl
  math_real.vhdl
  numeric_bit-body.vhdl
  numeric_bit.vhdl
  numeric_std-body.vhdl
  numeric_std.vhdl
  std_logic_1164-body.vhdl
  std_logic_1164.vhdl
  prmtvs_p.vhdl
  prmtvs_b.vhdl
  timing_p.vhdl
  timing_b.vhdl
  memory_p.vhdl
  memory_b.vhdl

Note you will need to uncomment the definition of operator "xnor" in the
std_logic_1164 package and body.