Question: Which VHDL synthesis tools support the VHDL 2008 fixed and floating 
point types as described at [vhdl.org/fphdl](http://www.vhdl.org/fphdl/)? The
VHDL.org site states "all these packages are designed to be synthesizable in
VHDL-93". Which tools have yield successful results synthesizing the 
VHDL-2008 fixed-point and floating-point types?

Second question, what is the status of VHDL-2008. Has it been ratified?

Answer: 
Yes, VHDL-2008 was ratified

> 
> "In February 2008, Accellera approved VHDL 4.0 also informally known
>  as VHDL 2008, which addressed more than 90 issues discovered during
>  the trial period for version 3.0 and includes enhanced generic types.
>  In 2008, Accellera released VHDL 4.0 to the IEEE for balloting for
>  inclusion in IEEE 1076-2008. The VHDL standard IEEE 1076-2008 was
>  published in January 2009."
> 
> 
> 

-<http://en.wikipedia.org/wiki/Vhdl>
I have used the VHDL fixed-point libraries in Altera's Quartus II (v9.1), with a Cyclone III. They synthesized an IIR filter and an LMS adaptive filter fairly efficiently - I noticed no major difference in resource usage compared to my previous implementation using numeric\_std.

So, I am confident that Quartus supports the fixed-point libraries.