All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Pages
bisect_kernel_large.hpp File Reference

First step of the bisection algorithm for the computation of eigenvalues. More...

`#include "viennacl/linalg/detail/bisect/config.hpp"`
`#include "viennacl/linalg/detail/bisect/util.hpp"`
`#include "viennacl/linalg/cuda/bisect_util.hpp"`

Go to the source code of this file.

## Namespaces

| viennacl
| Main namespace in ViennaCL. Holds all the basic types such as vector, matrix, etc. and defines operations upon them.
| viennacl::linalg
| Provides all linear algebra operations which are not covered by operator overloads.
| viennacl::linalg::cuda
| Holds all CUDA compute kernels used by ViennaCL.

## Functions

template<typename NumericT >

__device__ void

viennacl::linalg::cuda::writeToGmem (const unsigned int tid, const unsigned int tid_2, const unsigned int num_threads_active, const unsigned int num_blocks_mult, NumericT *g_left_one, NumericT *g_right_one, unsigned int *g_pos_one, NumericT *g_left_mult, NumericT *g_right_mult, unsigned int *g_left_count_mult, unsigned int *g_right_count_mult, NumericT *s_left, NumericT *s_right, unsigned short *s_left_count, unsigned short *s_right_count, unsigned int *g_blocks_mult, unsigned int *g_blocks_mult_sum, unsigned short *s_compaction_list, unsigned short *s_cl_helper, unsigned int offset_mult_lambda)

| Write data to global memory. More...
template<typename NumericT >

__device__ void

viennacl::linalg::cuda::compactStreamsFinal (const unsigned int tid, const unsigned int tid_2, const unsigned int num_threads_active, unsigned int &offset_mult_lambda, NumericT *s_left, NumericT *s_right, unsigned short *s_left_count, unsigned short *s_right_count, unsigned short *s_cl_one, unsigned short *s_cl_mult, unsigned short *s_cl_blocking, unsigned short *s_cl_helper, unsigned int is_one_lambda, unsigned int is_one_lambda_2, NumericT &left, NumericT &right, NumericT &left_2, NumericT &right_2, unsigned int &left_count, unsigned int &right_count, unsigned int &left_count_2, unsigned int &right_count_2, unsigned int c_block_iend, unsigned int c_sum_block, unsigned int c_block_iend_2, unsigned int c_sum_block_2)

| Perform final stream compaction before writing data to global memory. More...
__device__ void | viennacl::linalg::cuda::scanCompactBlocksStartAddress (const unsigned int tid, const unsigned int tid_2, const unsigned int num_threads_compaction, unsigned short *s_cl_blocking, unsigned short *s_cl_helper)
| Compute addresses to obtain compact list of block start addresses. More...
__device__ void | viennacl::linalg::cuda::scanSumBlocks (const unsigned int tid, const unsigned int tid_2, const unsigned int num_threads_active, const unsigned int num_threads_compaction, unsigned short *s_cl_blocking, unsigned short *s_cl_helper)
| Perform scan to obtain number of eigenvalues before a specific block. More...
__device__ void | viennacl::linalg::cuda::scanInitial (const unsigned int tid, const unsigned int tid_2, const unsigned int mat_size, const unsigned int num_threads_active, const unsigned int num_threads_compaction, unsigned short *s_cl_one, unsigned short *s_cl_mult, unsigned short *s_cl_blocking, unsigned short *s_cl_helper)
template<typename NumericT >

__device__ void

viennacl::linalg::cuda::storeNonEmptyIntervalsLarge (unsigned int addr, const unsigned int num_threads_active, NumericT *s_left, NumericT *s_right, unsigned short *s_left_count, unsigned short *s_right_count, NumericT left, NumericT mid, NumericT right, const unsigned short left_count, const unsigned short mid_count, const unsigned short right_count, NumericT epsilon, unsigned int &compact_second_chunk, unsigned short *s_compaction_list, unsigned int &is_active_second)

template<typename NumericT >

__global__ void

viennacl::linalg::cuda::bisectKernelLarge (const NumericT *g_d, const NumericT *g_s, const unsigned int n, const NumericT lg, const NumericT ug, const unsigned int lg_eig_count, const unsigned int ug_eig_count, NumericT epsilon, unsigned int *g_num_one, unsigned int *g_num_blocks_mult, NumericT *g_left_one, NumericT *g_right_one, unsigned int *g_pos_one, NumericT *g_left_mult, NumericT *g_right_mult, unsigned int *g_left_count_mult, unsigned int *g_right_count_mult, unsigned int *g_blocks_mult, unsigned int *g_blocks_mult_sum)

Bisection to find eigenvalues of a real, symmetric, and tridiagonal matrix g_d diagonal elements in global memory g_s superdiagonal elements in global elements (stored so that the element *(g_s - 1) can be accessed and equals 0 n size of matrix lg lower bound of input interval (e.g. Gerschgorin interval) ug upper bound of input interval (e.g. Gerschgorin interval) lg_eig_count number of eigenvalues that are smaller than lg lu_eig_count number of eigenvalues that are smaller than lu epsilon desired accuracy of eigenvalues to compute. More...

## Detailed Description

First step of the bisection algorithm for the computation of eigenvalues.

Implementation based on the sample provided with the CUDA 6.0 SDK, for which the creation of derivative works is allowed by including the following statement: "This software contains source code provided by NVIDIA Corporation."

Definition in file bisect_kernel_large.hpp.