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Current HDL support for fixed point

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shaiko

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Hello,

Are there any fixed point VHDL libraries that gained full synthesis support from the major vendors ?
 

None.
This page has libraries that appear to work in the vendor tools, but they are not officially supported:

www.vhdl.org/fphdl

Fixed point is nothing more than integer arithmetic
 

Did you have any positive experience working with any of them on Quartus ?
 

Yes - I used the altera version from the link above successfully in Quartus 9/10.
I infered multipliers and rams using the sfixed type (which were in a 2d array most the time)
 
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    shaiko

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Did you have any positive experience working with any of them on Quartus ?
Yes. They work quite well both in Modelsim and Quartus.

Kevin
 
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    shaiko

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Yes. They work quite well both in Modelsim and Quartus.
Any particular one you'd recommend from TrickyDicky's list ?
 

Any particular one you'd recommend from TrickyDicky's list ?
I've used the VHDL-93 fixed point package for several years. I haven't tried the 2008 version since the 93 version was doing what it should and at the time, 2008 support was spottier than it is today. I don't think I had to use the 'Altera' specific version that is listed on **broken link removed**

Kevin
 
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    shaiko

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Afaik, the altera one is just the normal library without any l anything removed. The xilinx one had to be heavily modified to make it work. Read the descriptions.
 

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