As part of the work to reduce the number of copies of array handles the CUDA
backend was broken. The transportation of stack allocated classes to CUDA
relies on all member variables being value based, not references/pointers.
This correct the issue of sending references to host side memory to CUDA, at
the cost of two copies of the Invocation object.
When we move to C++11 we need to revisit this work and see if std::move
can help reduce the cost of these copies.
4153c2c7 Found a few more places where we don't need to return by value.
dd85fc13 Document why we certain classes member variables need to be const ref.
6fb86da8 DynamicArrayHandle Casting methods now holds by const * const.
c1560e2d Perform less unnecessary copies when deducing a worklets parameters.
Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Kenneth Moreland <kmorel@sandia.gov>
Merge-request: !320
There was an inconsistency in naming classes where axes-aligned grids
with even spacing were sometimes called "uniform" and sometimes called
"regular". Maintain consistency by always calling them uniform.
86bb45b9 Simplify the ifdef conditions used for vector pragma definitions
Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Robert Maynard <robert.maynard@kitware.com>
Merge-request: !310
f5f9939f Update all of vtkm to understand it can only identify as one compiler.
c706c826 Configure.h can only state a machine is a one compiler.
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !307
It used to be possible for vtk-m to say it was multiple compilers, for example
it could be both GCC and PGI, Clang and MSVC ( yes possible ), or Intel and
Clang.
This logical restructure now makes that impossible, and instead prefers a system
where we choose the most specialized version of the compiler over the most
general, where general is GCC / Clang.
Older GCC compilers (earlier than 4.6) do not support the diagnostic
pragmas that push and pop the warning levels. This change just disables
the warnings we need to for third party libraries and leaves them off.
This means you might miss some legit warnings on older compilers, but
most developers use newer compilers anyway, and the push/pop should
still work there.
Scatter in worklets
Add the functionality to perform a scatter operation from input to output in a worklet invocation. This allows you to, for example, specify a variable amount of outputs generated for each input.
See merge request !221
This has been requested on the mailing list to make it easier to
interpolate integer vectors.
There are a couple of downsides to this addition. First, it implicitly
casts doubles back to whatever the vector type is, which can cause a
loss of precision. Second, it makes it more likely to get overload
errors when multiplying with Vec. In particular, the operator to cast
Vec of size 1 to the component class had to be removed.
CUDA default constructors, destructors, and assignment operators
Several classes exclusively work in the control environment. However, CUDA likes to add __device__ to constructors, destructors, and assignment operators it automatically creates. This in turn causes warnings about the __device__ function using host-only classes (like boost::shared_ptr). Solve this problem by adding explicit methods for all of these.
See merge request !245
This now allows for even more efficient construction of uniform point
coordinates when running under the 3d scheduler, since we don't need to go
from 3d index to flat index to 3d index, instead we stay in 3d index
Previously, all Fetch objects received an Invocation object in their
Load and Store methods. The point of this was that it allowed the Fetch
to get data from any of the execution objects. However, every Fetch
either just got data directly from its associated execution object or
else used a secondary execution object (the input domain) to get indices
into their own execution object.
This left two potential areas for improvement. First, pulling data out
of the Invocation object was unnecessarily complicated. It would be much
nicer to get data directly from the associated execution object. Second,
when getting index information from the input domain, it was often the
case that extra computations were necessary (particularly on structured
cell sets). There was no way to share the index information among
Fetches, and therefore the computations were replicated.
This change removes the Invocation from the Fetch Load and Store.
Instead, it passes the associated execution object and a new object type
called the ThreadIndices. The ThreadIndices are customized for the input
domain and therefore have all the information needed for a redirected
lookup. It is also a thread-local object so it can cache computed
indices and save on computation time.
Xcode 7 warnings
The XCode 7 compiler has a new warning for unused typedefs. The Boost code we use has some instances where this warning gets issued. Suppress these warnings.
See merge request !199
This is to be used in place of BOOST_STATIC_ASSERT so that we can
control its implementation.
The implementation is designed to fix the issue where the latest XCode
clang compiler gives a warning about a unused typedefs when the boost
static assert is used within a function. (This warning also happens when
using the C++11 static_assert keyword.) You can suppress this warning
with _Pragma commands, but _Pragma commands inside a block is not
supported in GCC. The implementation of VTKM_STATIC_ASSERT handles all
current cases.
The recently added pragma to suppress warnings about unused local
typedefs caused lots of dashboard failures because many GCC and clang
compiler do not have this warning so did not recognized the pragma to
suppress it. Now only use the pragma on clang compilers with a large
enough version.
I also discovered that the check for VTKM_CLANG was wrong (at least for
the most modern versions of XCode). Fixed that as well as some uses of
VTKM_CLANG that were wrong.
XCode 7 added a warning for unused typedefs. VTK-m proper does not have
any instances of this, but there are several cases in the Boost code
that we are using. Add an exception to the third party pragmas to
supporess this warning.
In the special case where you are loading the point coordinates for a
structured grid in a point to cell map (an important use case), create a
VecRectilinearPointCoordinates rather than build a Vec of the values.
This will activate the cell specalizations in previous commits.
These changes also added some flat-to-logical index conversion and vice
versa in ConnectivityStructuredInternals. This change also fixed a bug
in getting cells attached to points in 2D grids. (Actually, technically
someone else fixed it and checked it in first. The changes were merged
during a rebase.)
I also added a specalization to Vec for 1D that implicitly converts
between the 1D Vec and the component. This can be convenient when
templating on the Vec length.
adding cell-to-point topology support and worklet
This adds code to support a cell-to-point topological mapping worklet.
For explicit cell set, there is code to calculate a cell-to-point topology from the canonical point-to-cell topology. (It is not parallelized at this point.) Most of the required code for structured grids was already in place.
See merge request !154
