Developer Reference for Intel® oneAPI Math Kernel Library for C

ID 766684
Date 3/22/2024
Public

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cblas_?dotci

Computes the conjugated dot product of a compressed sparse complex vector with a full-storage complex vector.

Syntax

void cblas_cdotci_sub (const MKL_INT nz, const void *x, const MKL_INT *indx, const void *y, void *dotui);

void cblas_zdotci_sub (const MKL_INT nz, const void *x, const MKL_INT *indx, const void *y, void *dotui);

Include Files

  • mkl.h

Description

The ?dotci routines return the dot product of x and y defined as

conjg(x[0])*y[indx[0]] + ... + conjg(x[nz-1])*y[indx[nz-1]]

where the triple (nz, x, indx) defines a sparse complex vector stored in compressed form, and y is a real vector in full storage form. The functions reference only the elements of y whose indices are listed in the array indx. The values in indx must be distinct.

Input Parameters

nz

The number of elements in x and indx .

x

Array, size at least nz.

indx

Specifies the indices for the elements of x.

Array, size at least nz.

y

Array, size at least max(indx[i]).

Output Parameters

dotui

Contains the conjugated dot product of x and y, if nz is positive. Otherwise, it contains 0.