cuquantum.custatevec.compute_expectation_get_workspace_size¶
- cuquantum.custatevec.compute_expectation_get_workspace_size(intptr_t handle, int sv_data_type, uint32_t n_index_bits, intptr_t matrix, int matrix_data_type, int layout, uint32_t n_basis_bits, int compute_type) size_t[source]¶
Computes the required workspace size for
compute_expectation().- Parameters
handle (intptr_t) – The library handle.
sv_data_type (cuquantum.cudaDataType) – The data type of the statevector.
n_index_bits (uint32_t) – The number of index bits.
matrix (intptr_t) – The pointer address (as Python
int) to a matrix (on either host or device).matrix_data_type (cuquantum.cudaDataType) – The data type of the matrix.
layout (MatrixLayout) – The memory layout the the matrix.
n_basis_bits (uint32_t) – The length of
basis_bits.compute_type (cuquantum.ComputeType) – The compute type of matrix multiplication.
- Returns
The required workspace size (in bytes).
- Return type
size_t