mirror of
https://gitlab.com/libeigen/eigen.git
synced 2024-12-15 07:10:37 +08:00
33 lines
1.4 KiB
Plaintext
33 lines
1.4 KiB
Plaintext
|
|
namespace Eigen {
|
|
|
|
/** \page TopicCUDA Using Eigen in CUDA kernels
|
|
|
|
\b Disclaimer: this page is about an \b experimental feature in %Eigen.
|
|
|
|
Staring from CUDA 5.0, the CUDA compiler, \c nvcc, is able to properly parse %Eigen's code (almost).
|
|
A few adaptations of the %Eigen's code already allows to use some parts of %Eigen in your own CUDA kernels.
|
|
To this end you need the devel branch of %Eigen, CUDA 5.0 or greater with GCC.
|
|
|
|
Known issues:
|
|
|
|
- \c nvcc with MS Visual Studio does not work (patch welcome)
|
|
|
|
- \c nvcc with \c clang does not work (patch welcome)
|
|
|
|
- \c nvcc 5.5 with gcc-4.7 (or greater) has issues with the standard \c \<limits\> header file. To workaround this, you can add the following before including any other files:
|
|
\code
|
|
// workaround issue between gcc >= 4.7 and cuda 5.5
|
|
#if (defined __GNUC__) && (__GNUC__>4 || __GNUC_MINOR__>=7)
|
|
#undef _GLIBCXX_ATOMIC_BUILTINS
|
|
#undef _GLIBCXX_USE_INT128
|
|
#endif
|
|
\endcode
|
|
|
|
- On 64bits system Eigen uses \c long \c int as the default type for indexes and sizes. On CUDA device, it would make sense to default to 32 bits \c int.
|
|
However, to keep host and CUDA code compatible, this cannot be done automatically by %Eigen, and the user is thus required to define \c EIGEN_DEFAULT_DENSE_INDEX_TYPE to \c int throughout his code (or only for CUDA code if there is no interaction between host and CUDA code through %Eigen's object).
|
|
|
|
*/
|
|
|
|
}
|