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                                                                                                                                                                                                                                              cl::sycl::experimental::sub_group Struct Reference

                                                                                                                                                                                                                                              The sub_group class is an interface for subgroups. More...

                                                                                                                                                                                                                                              #include <sub_group.h>

                                                                                                                                                                                                                                              Public Member Functions

                                                                                                                                                                                                                                              id< 1 > get_group_id () const noexcept
                                                                                                                                                                                                                                               Get an id representing the index of the subgroup within the work-group. More...
                                                                                                                                                                                                                                               
                                                                                                                                                                                                                                              range< 1 > get_group_range () const noexcept
                                                                                                                                                                                                                                               Get the number of subgroups within the work-group. More...
                                                                                                                                                                                                                                               
                                                                                                                                                                                                                                              range< 1 > get_uniform_group_range () const noexcept
                                                                                                                                                                                                                                               Get the number of subgroups per work-group in the uniform region of the nd-range. More...
                                                                                                                                                                                                                                               
                                                                                                                                                                                                                                              id< 1 > get_local_id () const noexcept
                                                                                                                                                                                                                                               Get an id representing the index of the work-item within the subgroup. More...
                                                                                                                                                                                                                                               
                                                                                                                                                                                                                                              range< 1 > get_local_range () const noexcept
                                                                                                                                                                                                                                               Get the number of work-items in the subgroup. More...
                                                                                                                                                                                                                                               
                                                                                                                                                                                                                                              range< 1 > get_max_local_range () const noexcept
                                                                                                                                                                                                                                               Get the maximum number of work-items in any subgroups within the nd-range. More...
                                                                                                                                                                                                                                               
                                                                                                                                                                                                                                               COMPUTECPP_DEPRECATED_BY_SYCL_VER (202001, "Use group_barrier(sub_group) instead.") inline void barrier(access
                                                                                                                                                                                                                                               Synchronizes all work-items in a subgroup. More...
                                                                                                                                                                                                                                               

                                                                                                                                                                                                                                              Public Attributes

                                                                                                                                                                                                                                              size_t m_subGroupId
                                                                                                                                                                                                                                               
                                                                                                                                                                                                                                              size_t m_subGroupRange
                                                                                                                                                                                                                                               
                                                                                                                                                                                                                                              size_t m_uniformSubGroupRange
                                                                                                                                                                                                                                               
                                                                                                                                                                                                                                              size_t m_localId
                                                                                                                                                                                                                                               
                                                                                                                                                                                                                                              size_t m_localRange
                                                                                                                                                                                                                                               
                                                                                                                                                                                                                                              size_t m_maxLocalRange
                                                                                                                                                                                                                                               

                                                                                                                                                                                                                                              Detailed Description

                                                                                                                                                                                                                                              The sub_group class is an interface for subgroups.

                                                                                                                                                                                                                                              Definition at line 49 of file sub_group.h.

                                                                                                                                                                                                                                              Member Function Documentation

                                                                                                                                                                                                                                              ◆ COMPUTECPP_DEPRECATED_BY_SYCL_VER()

                                                                                                                                                                                                                                              cl::sycl::experimental::sub_group::COMPUTECPP_DEPRECATED_BY_SYCL_VER ( 202001  ,
                                                                                                                                                                                                                                              "Use group_barrier(sub_group) instead."   
                                                                                                                                                                                                                                              )
                                                                                                                                                                                                                                              		inline

                                                                                                                                                                                                                                              Synchronizes all work-items in a subgroup.

                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              fenceSpaceBarrier fence space.Logical any function.
                                                                                                                                                                                                                                              predicateValue of the predicate for the current work-item.
                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              True if predicate is true for any work-item in the subgroup.Logical all function.
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              predicateValue of the predicate for the current work-item.
                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              True if predicate is true for all work-items in the subgroup.Broadcast x from the specified localId to all work-items within the subgroup.
                                                                                                                                                                                                                                              Template Parameters
                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              xValue to broadcast.
                                                                                                                                                                                                                                              localIdMust be the same id for all work-items in the subgroup.
                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The value broadcasted by localId.Reduce the values x from all work-items. The initialization value is chosen to be the identity element of binaryOp.
                                                                                                                                                                                                                                              Template Parameters
                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                              BinaryOp
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              xValue to reduce for the current work-item.
                                                                                                                                                                                                                                              binaryOpReduce operation, must be one of cl::sycl::plus, cl::sycl::minimum, cl::sycl::maximum.
                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The result of the reduction.Reduce the values x from all work-items.
                                                                                                                                                                                                                                              Template Parameters
                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                              BinaryOp
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              xValue to reduce for the current work-item.
                                                                                                                                                                                                                                              initInitialization value.
                                                                                                                                                                                                                                              binaryOpReduce operation, must be one of cl::sycl::plus, cl::sycl::minimum, cl::sycl::maximum.
                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The result of the reduction.Exclusive scan of the values x from all work-items. The value returned on the i-th work-item is the scan of the first i work-items. The initialization value is chosen to be the identity element of binaryOp.
                                                                                                                                                                                                                                              Template Parameters
                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                              BinaryOp
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              xValue to reduce for the current work-item.
                                                                                                                                                                                                                                              binaryOpScan operation, must be one of cl::sycl::plus, cl::sycl::minimum, cl::sycl::maximum.
                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The result of the exclusive scan of the first i work-items.Exclusive scan of the values x from all work-items. The value returned on the i-th work-item is the scan of the first i work-items.
                                                                                                                                                                                                                                              Template Parameters
                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                              BinaryOp
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              xValue to reduce for the current work-item.
                                                                                                                                                                                                                                              initInitialization value.
                                                                                                                                                                                                                                              binaryOpScan operation, must be one of cl::sycl::plus, cl::sycl::minimum, cl::sycl::maximum.
                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The result of the exclusive scan of the first i work-items.Inclusive scan of the values x from all work-items. The value returned on the i-th work-item is the scan of the first i work-items. The initialization value is chosen to be the identity element of binaryOp.
                                                                                                                                                                                                                                              Template Parameters
                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                              BinaryOp
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              xValue to reduce for the current work-item.
                                                                                                                                                                                                                                              binaryOpScan operation, must be one of cl::sycl::plus, cl::sycl::minimum, cl::sycl::maximum.
                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The result of the inclusive scan of the first i work-items.Inclusive scan of the values x from all work-items. The value returned on the i-th work-item is the scan of the first i work-items.
                                                                                                                                                                                                                                              Template Parameters
                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                              BinaryOp
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              xValue to reduce for the current work-item.
                                                                                                                                                                                                                                              initInitialization value.
                                                                                                                                                                                                                                              binaryOpScan operation, must be one of cl::sycl::plus, cl::sycl::minimum, cl::sycl::maximum.
                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The result of the inclusive scan of the first i work-items.Exchange values of x between work-items in a subgroup.
                                                                                                                                                                                                                                              Template Parameters
                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              xValue to send.
                                                                                                                                                                                                                                              localIdWork-item id to retrieve.
                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The value sent by the work-item localId.Exchange values of x between work-items in a subgroup. shuffle_down is a specialized version of shuffle that may be optimized. The return value is unspecified if get_local_id() + delta >= get_local_range().
                                                                                                                                                                                                                                              Template Parameters
                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              xValue to send.
                                                                                                                                                                                                                                              deltaOffset added to the calling work-item's id.
                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The value sent by the work-item whose id is get_local_id() + delta.Exchange values of x between work-items in a subgroup. shuffle_up is a specialized version of shuffle that may be optimized. The return value is unspecified if get_local_id() - delta < 0.
                                                                                                                                                                                                                                              Template Parameters
                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              xValue to send.
                                                                                                                                                                                                                                              deltaOffset substracted to the calling work-item's id.
                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The value sent by the work-item whose id is get_local_id() - delta.Exchange values of x between work-items in a subgroup. shuffle_xor is a specialized version of shuffle that may be optimized.
                                                                                                                                                                                                                                              Template Parameters
                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              xValue to send.
                                                                                                                                                                                                                                              maskMask applied to the calling work-item's, must be constant across the subgroup.
                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The value sent by the work-item whose id is get_local_id() ^ mask.Exchange values of x and y between work-items in a subgroup. Two inputs shuffles can be thought as a one input shuffle on a virtual subgroup twice as big.
                                                                                                                                                                                                                                              Template Parameters
                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              xValue to send.
                                                                                                                                                                                                                                              yValue to send.
                                                                                                                                                                                                                                              localIdWork-item id to retrieve, must be between 0 and twice the subgroup size.
                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The value x sent by the work-item whose id is localId if localId is between 0 and the subgroup size. Return the value y sent the work-item whose id is localId % get_local_range() otherwise.Exchange values of x and y between work-items in a subgroup. Two inputs shuffles can be thought as a one input shuffle on a virtual subgroup twice as big. shuffle_down is a specialized version of shuffle that may be optimized.
                                                                                                                                                                                                                                              Template Parameters
                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              xValue to send.
                                                                                                                                                                                                                                              yValue to send.
                                                                                                                                                                                                                                              deltaOffset added to the calling work-item's id, must be less than the subgroup size.
                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The value x sent by the work-item whose id is get_local_id() + delta if the result is between 0 and the subgroup size. Return the value y sent by the work-item whose id is (get_local_id() + delta) % get_local_range() otherwise.Exchange values of x and y between work-items in a subgroup. Two inputs shuffles can be thought as a one input shuffle on a virtual subgroup twice as big. shuffle_up is a specialized version of shuffle that may be optimized.
                                                                                                                                                                                                                                              Template Parameters
                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              xValue to send.
                                                                                                                                                                                                                                              yValue to send.
                                                                                                                                                                                                                                              deltaOffset added to the calling work-item's id, must be less than the subgroup size.
                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The value x sent by the work-item whose id is get_local_id() - delta if the result is between 0 and the subgroup size. Return the value y sent by the work-item whose id is (get_local_id() - delta) % get_local_range() otherwise.Load contiguous data from src.
                                                                                                                                                                                                                                              Template Parameters
                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                              Space
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              srcPointer to the data to load, must be the same across all work-items in the subgroup.
                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              T Data corresponding to src + get_local_id().Load contiguous data from src.
                                                                                                                                                                                                                                              Template Parameters
                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                              NNumber of element to load per work-item.
                                                                                                                                                                                                                                              Space
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              srcPointer to the data to load, must be the same across all work-items in the subgroup.
                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              T Data corresponding to src + get_local_id() + i * get_max_local_range() for i between 0 and N.Store contiguous data to dst.
                                                                                                                                                                                                                                              Template Parameters
                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                              Space
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              dstPointer to the data to store, must be the same across all work-items in the subgroup.
                                                                                                                                                                                                                                              xValue to store at dst + get_local_id().Store contiguous data to dst.
                                                                                                                                                                                                                                              Template Parameters
                                                                                                                                                                                                                                              T
                                                                                                                                                                                                                                              NNumber of element to store per work-item.
                                                                                                                                                                                                                                              Space
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              dstPointer to the data to store, must be the same across all work-items in the subgroup.
                                                                                                                                                                                                                                              xValues to store at dst + get_local_id() + i * get_max_local_range() for i between 0 and N.Construct a new subgroup object. Constructor is private to enforce construction by nd_item::get_sub_group().
                                                                                                                                                                                                                                              subGroupId
                                                                                                                                                                                                                                              See also
                                                                                                                                                                                                                                              get_group_id.
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              subGroupRange
                                                                                                                                                                                                                                              See also
                                                                                                                                                                                                                                              get_group_range.
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              localId
                                                                                                                                                                                                                                              See also
                                                                                                                                                                                                                                              get_local_id.
                                                                                                                                                                                                                                              Parameters
                                                                                                                                                                                                                                              localRange
                                                                                                                                                                                                                                              See also
                                                                                                                                                                                                                                              get_local_range.

                                                                                                                                                                                                                                              Definition at line 149 of file sub_group.h.

                                                                                                                                                                                                                                              ◆ get_group_id()

                                                                                                                                                                                                                                              id<1> cl::sycl::experimental::sub_group::get_group_id ( ) const
                                                                                                                                                                                                                                              		inlinenoexcept

                                                                                                                                                                                                                                              Get an id representing the index of the subgroup within the work-group.

                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The subgroup id.

                                                                                                                                                                                                                                              Definition at line 73 of file sub_group.h.

                                                                                                                                                                                                                                              ◆ get_group_range()

                                                                                                                                                                                                                                              range<1> cl::sycl::experimental::sub_group::get_group_range ( ) const
                                                                                                                                                                                                                                              		inlinenoexcept

                                                                                                                                                                                                                                              Get the number of subgroups within the work-group.

                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The subgroup range.

                                                                                                                                                                                                                                              Definition at line 78 of file sub_group.h.

                                                                                                                                                                                                                                              ◆ get_local_id()

                                                                                                                                                                                                                                              id<1> cl::sycl::experimental::sub_group::get_local_id ( ) const
                                                                                                                                                                                                                                              		inlinenoexcept

                                                                                                                                                                                                                                              Get an id representing the index of the work-item within the subgroup.

                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The local id.

                                                                                                                                                                                                                                              Definition at line 94 of file sub_group.h.

                                                                                                                                                                                                                                              ◆ get_local_range()

                                                                                                                                                                                                                                              range<1> cl::sycl::experimental::sub_group::get_local_range ( ) const
                                                                                                                                                                                                                                              		inlinenoexcept

                                                                                                                                                                                                                                              Get the number of work-items in the subgroup.

                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The local range.

                                                                                                                                                                                                                                              Definition at line 99 of file sub_group.h.

                                                                                                                                                                                                                                              ◆ get_max_local_range()

                                                                                                                                                                                                                                              range<1> cl::sycl::experimental::sub_group::get_max_local_range ( ) const
                                                                                                                                                                                                                                              		inlinenoexcept

                                                                                                                                                                                                                                              Get the maximum number of work-items in any subgroups within the nd-range.

                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The maximum local range.

                                                                                                                                                                                                                                              Definition at line 142 of file sub_group.h.

                                                                                                                                                                                                                                              ◆ get_uniform_group_range()

                                                                                                                                                                                                                                              range<1> cl::sycl::experimental::sub_group::get_uniform_group_range ( ) const
                                                                                                                                                                                                                                              		inlinenoexcept

                                                                                                                                                                                                                                              Get the number of subgroups per work-group in the uniform region of the nd-range.

                                                                                                                                                                                                                                              Returns
                                                                                                                                                                                                                                              The subgroup uniform range.

                                                                                                                                                                                                                                              Definition at line 86 of file sub_group.h.

                                                                                                                                                                                                                                              Member Data Documentation

                                                                                                                                                                                                                                              ◆ m_localId

                                                                                                                                                                                                                                              size_t cl::sycl::experimental::sub_group::m_localId

                                                                                                                                                                                                                                              Definition at line 507 of file sub_group.h.

                                                                                                                                                                                                                                              ◆ m_localRange

                                                                                                                                                                                                                                              size_t cl::sycl::experimental::sub_group::m_localRange

                                                                                                                                                                                                                                              Definition at line 508 of file sub_group.h.

                                                                                                                                                                                                                                              ◆ m_maxLocalRange

                                                                                                                                                                                                                                              size_t cl::sycl::experimental::sub_group::m_maxLocalRange

                                                                                                                                                                                                                                              Definition at line 509 of file sub_group.h.

                                                                                                                                                                                                                                              ◆ m_subGroupId

                                                                                                                                                                                                                                              size_t cl::sycl::experimental::sub_group::m_subGroupId

                                                                                                                                                                                                                                              Definition at line 504 of file sub_group.h.

                                                                                                                                                                                                                                              ◆ m_subGroupRange

                                                                                                                                                                                                                                              size_t cl::sycl::experimental::sub_group::m_subGroupRange

                                                                                                                                                                                                                                              Definition at line 505 of file sub_group.h.

                                                                                                                                                                                                                                              ◆ m_uniformSubGroupRange

                                                                                                                                                                                                                                              size_t cl::sycl::experimental::sub_group::m_uniformSubGroupRange

                                                                                                                                                                                                                                              Definition at line 506 of file sub_group.h.

                                                                                                                                                                                                                                              The documentation for this struct was generated from the following file:

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