Floating-point to fixed-point samples in C/C++

vutruong <vuttruong@yahoo.com> wrote:

>It seems that I didn't describe my issue clearly.
>
>My work is to remove the floating-point. My project is written in C
>language. And there are some simple operations: addition, subtraction,
>multiplication, division and exponent. I think I will make a fixed-point
>library with these simple operations. I read some papers about fixed-point
>but they are difficult for me to implement the operations in my library. My
>project after removing floating-point will use 16 bits to present a
>number.
>
>Thanks for your helps,

Have you considered using System C?  Its libraries define fixed-point
types that are quire flexible and can certainly do what you want.
Usually they are pretty fast also.

Steve

Baskar--

>Or...are you looking for C/C++ code that takes as input, code in C/C++
for a
>floating point algorithm and outputs code for the same algorithm in
fixed
>point??
>You won't find any C/C++ code for any of the above 2 problems.

Mmm.. Am not sure if thats true. I remember a research effort along these
lines at some university under the name FRIDGE(Fixed-point pRogrammIng
DesiGn Environment) Not sure if it ever worked though!

OK. Here is a quick google based link(untested by me):

http://www.ert.rwth-aachen.de/Projekte/Tools/FRIDGE/fridge.html

--Bhooshan

		
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Bhooshan Iyer wrote:
>  I remember a research effort along these
> lines at some university under the name FRIDGE(Fixed-point pRogrammIng
> DesiGn Environment) Not sure if it ever worked though!

Well, their acronym sure didn't.

-- 
Jim Thomas            Principal Applications Engineer  Bittware, Inc
jthomas@bittware.com  http://www.bittware.com    (603) 226-0404 x536
I thought I was wrong once, but I was mistaken.