floating point operating in vhdl (fixed_pkg)

Tricky, thank you for your reply. I've appreciated your answers over the years, but rarely post myself.

The reason I'm using David Bishop's 1993 version of fixed_pkg is because Quartus 16.1 Standard doesn't support the 2008 version. Altera Support told me that Quartus 16.1 Prime doesn't either.

Are you suggesting that I copy the library files from my ModelSim installation (ie. the 2008 version) into my Quartus project and compile it into the IEEE library in Quartus? So I would have these lines?

library ieee;

use ieee.fixed_float_types.all;

use ieee.fixed_pkg.all;

Does Quartus Synthesis support the 2008 version? Was/is it just missing the 2008 library files? I tried compiling the 1993 version into the ieee_proposed library in my Quartus project, and it works, but my ModelSim project reports errors with fixed_pkg_c.vhdl.