Hi Andreas,
Using pycuda-complex doesn't have this issue. Therefore, I think it is
not safe to use cuComplex types in passing scalar variables to the
kernel, for now. I'm not sure how exactly python or the wrapper handles
complex numbers internally, but cuComplex is basically a float2/double2
struct, might be different thus cause the problem.
Yiyin
On 9/21/2010 11:10 PM, Andreas Kloeckner wrote:
Hi Yiyin,
On Tue, 21 Sep 2010 15:53:50 -0400, Yiyin Zhou<[email protected]> wrote:
Thanks. Actually I thought this problem is somehow related to the
problem I have, so I listed that simple demo.
The actual problem I have is to pass a complex scalar to a kernel,
type is defined by cuComplex.h, it sometimes gave me an incorrect
result (I guess the input argument struct is misaligned). I have
attached a script to reproduce this error.
Hmm--I can't really say much about cuComplex. PyCUDA's complex stuff is
from
#include<pycuda-complex.hpp>
and the type is
pycuda::complex<float>
But you are right--this does look like an alignment issue. Please speak
up if you can also reproduce this with the PyCUDA types.
Andreas
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