Re: Mathlib : I can make and provide a Mathlib zip, no
prob. But I'm still a little confused by your last
statement about 'directly linking to sources' - how is
that different from using the functions via the
Mathlib header?
Re: the sqrt/float stuff. Here's my little test code :
static void testSqrt() {
double yarr[] = {0, 1, 2, 3, 4, 5, 6, 7, 8 };
double xarr[] = {1, 2, 3, 4, 5, 6, 7, 8, 9 };
int k;
double x,y,z;
for (k = 0; k < sizeof(yarr); ++k) {
x=xarr[k];
y=yarr[k];
z = __ieee754_sqrt((y*y)+(x*x));
}
}
z is always zero. I've just added the e_sqrt.c file
from FDLibM in my source files. I didn't use the
w_sqrt.c (I think w stands for wrapper, since it just
calls the ieee version) because of linking errors that
I couldn't resolve.
Thanks,
Brian Preston
--- In [EMAIL PROTECTED], Ben Combee
<[EMAIL PROTECTED]> wrote:
> At 11:33 2003-2-5 -0800, you wrote:
> >I'm getting wrong results from a couple basic
> >functions (atan and sqrt) that I've gotten from the
> >FDLibm library. The sqrt function simply returns
zero
> >every time. I have results from the atan() function
> >also (if anyone's interested), but since I'm having
> >problems with more than one function, it seems to
be a
> >more systemic problem.
>
> I would be interested in getting a test case of the
sqrt function failure
> so we can see if there is a problem with our code
generation.
>
> >I'm using CW 8. Are there any 'tricks' to using
> >floats, any settings or flags in the compiler,
> >hardware/software FP libraries, that have to be
turned
> >on in order to get floats to work right?
>
> There are no math settings that would affect this in
V8 other than "8-byte
> doubles" in the 68K Processor panel -- that should
be checked (on).
>
> >I can't use Mathlib because I want to sell the app
I'm
> >writing - is that a correct legal interpretation of
> >the Mathlib license? Or can I use it, but I just
have
> >my users install it separately? Can I sell a zip
file
> >that has Mathlib and my app separately?
>
> MathLib can be sold. The only restriction on your
program when using
> MathLib as shared library is that you need to
provide the MathLib source
> and build projects on request. By providing a
download link on your site
> to a MathLib.zip file with everything from the CW
MathLib folder, you
> fulfill that obligation. Since you aren't directly
linking to MathLib
> sources, your code does not fall under any GPL or
LGPL obligations.
>
> --
> Ben Combee <[EMAIL PROTECTED]>
> CodeWarrior for Palm OS technical lead
> Palm OS programming help @ www.palmoswerks.com
>
>
> --
> For information on using the Palm Developer Forums,
or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
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