ViennaCL - The Vienna Computing Library
1.5.1
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A proxy class for a single element of a vector or matrix. This proxy should not be noticed by end-users of the library. More...
#include <forwards.h>
Public Types | |
typedef viennacl::backend::mem_handle | handle_type |
Public Member Functions | |
entry_proxy (vcl_size_t mem_offset, handle_type &mem_handle) | |
The constructor for the proxy class. Declared explicit to avoid any surprises created by the compiler. More... | |
entry_proxy & | operator+= (SCALARTYPE value) |
Inplace addition of a CPU floating point value. More... | |
entry_proxy & | operator-= (SCALARTYPE value) |
Inplace subtraction of a CPU floating point value. More... | |
entry_proxy & | operator*= (SCALARTYPE value) |
Inplace multiplication with a CPU floating point value. More... | |
entry_proxy & | operator/= (SCALARTYPE value) |
Inplace division by a CPU floating point value. More... | |
entry_proxy & | operator= (SCALARTYPE value) |
Assignment of a CPU floating point value. More... | |
entry_proxy & | operator= (scalar< SCALARTYPE > const &value) |
Assignment of a GPU floating point value. Avoids unnecessary GPU->CPU->GPU transfers. More... | |
entry_proxy & | operator= (entry_proxy const &other) |
Assignment of another GPU value. More... | |
operator SCALARTYPE () const | |
Conversion to a CPU floating point value. More... | |
vcl_size_t | index () const |
Returns the index of the represented element. More... | |
handle_type const & | handle () const |
Returns the memory viennacl::ocl::handle. More... | |
A proxy class for a single element of a vector or matrix. This proxy should not be noticed by end-users of the library.
This proxy provides access to a single entry of a vector. If the element is assigned to a GPU object, no unnecessary transfers to the CPU and back to GPU are initiated.
SCALARTYPE | Either float or double |
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inlineexplicit |
The constructor for the proxy class. Declared explicit to avoid any surprises created by the compiler.
mem_offset | The memory offset in multiples of sizeof(SCALARTYPE) relative to the memory pointed to by the handle |
mem_handle | A viennacl::ocl::handle for the memory buffer on the GPU. |
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Returns the memory viennacl::ocl::handle.
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Returns the index of the represented element.
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Conversion to a CPU floating point value.
This conversion allows to write something like double test = vector(4); However, one has to keep in mind that CPU<->GPU transfers are very slow compared to CPU<->CPU operations.
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Inplace multiplication with a CPU floating point value.
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inline |
Inplace addition of a CPU floating point value.
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inline |
Inplace subtraction of a CPU floating point value.
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inline |
Inplace division by a CPU floating point value.
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inline |
Assignment of a CPU floating point value.
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inline |
Assignment of a GPU floating point value. Avoids unnecessary GPU->CPU->GPU transfers.
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Assignment of another GPU value.