From: Gautier Write-only <gautier@fakeaddress.nil>
Subject: Re: Simulation of fixed point in c WITH DIFFERENT BIT-WIDTH
Date: Sun, 30 Oct 2005 22:46:20 +0100
Date: 2005-10-30T22:46:20+01:00 [thread overview]
Message-ID: <43653F2C.B20F75B5@fakeaddress.nil> (raw)
In-Reply-To: 1130690498.388857.225170@g49g2000cwa.googlegroups.com
mnamky wrote:
> Hi all;
>
> Consider the following exaple
> y = x * b'
>
> where x is 12-bit wordlength and 11-bit fraction
> and b is 16-bit wordlength and 14-bit fraction
>
> simulation of this code is rather easy im Matlab but how could we do a
> full analysis of this code in C with a good precision?
>
> Thank you
It is also easy in Ada - something like...
procedure Fixed_12 is
type F1 is delta 2.0**(-11) range -1.0 .. 1.0;
type F2 is delta 2.0**(-14) range -2.0 .. 2.0;
x : F1;
y,b: F2;
begin
x:= 0.12345;
b:= 1.23456;
y:= x * b;
end;
The precision is guaranteed - better than good...
But you want to do this in C ?! By Jove!
Fortunately, your subconscient suggested you the right newsgroup.
BTW, something is wrong, either with your Shift key, or with your Caps Lock key - see the title.
I can only sympathize, after having a similar problem: some beer had found unexpectedly its way into my keyboard.
______________________________________________________________
Gautier -- http://www.mysunrise.ch/users/gdm/index.htm
Ada programming -- http://www.mysunrise.ch/users/gdm/gsoft.htm
TeXCAD -- http://www.mysunrise.ch/users/gdm/texcad.htm
NB: For a direct answer, e-mail address on the Web site!
next prev parent reply other threads:[~2005-10-30 21:46 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-30 16:41 Simulation of fixed point in c WITH DIFFERENT BIT-WIDTH mnamky
2005-10-30 17:00 ` Dmitry A. Kazakov
2005-10-30 21:46 ` Gautier Write-only [this message]
2005-11-01 2:50 ` Steve
2005-11-02 10:42 ` Colin Paul Gloster
2005-11-02 20:43 ` Gautier Write-only
2005-11-03 6:13 ` Simon Wright
2005-11-03 10:46 ` Colin Paul Gloster
2005-11-03 13:47 ` Robert A Duff
2005-11-03 14:33 ` Dmitry A. Kazakov
2005-11-03 18:19 ` Jeffrey R. Carter
2005-11-03 20:55 ` Simon Wright
2005-11-02 10:57 ` Colin Paul Gloster
2005-11-02 14:49 ` Martin Krischik
2005-11-02 20:40 ` Gautier Write-only
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox