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CXXBLAS Level 1: axpy

copy (defined in namespace cxxblas) copies a vector \(x\) to a vector \(y\), i.e. performs the operation \(y \leftarrow x\).

Generic Implementation

template <typename IndexType, typename X, typename Y>
    void
    copy(IndexType n, const X *x, IndexType incX, Y *y, IndexType incY);

n

(input)
Specifies the number of elements in vector \(x\) and \(y\).

x

(input)
Pointer to the first element of vector \(x\).

incX

(input)
Specifies the increment for indexing vector \(x\).

y

(output)
Pointer to the first element of vector \(y\).

incY

(input)
Specifies the increment for indexing vector \(y\).

CBLAS Implementation

If a CBLAS implementations like ATLAS, GotoBLAS, ... is available then the following optimized variants are provided.

Single Precision

template <typename IndexType>
    typename If<IndexType>::isBlasCompatibleInteger
    copy(IndexType n,
         const float *x, IndexType incX,
         float *y, IndexType incY);

Double Precision

template <typename IndexType>
    typename If<IndexType>::isBlasCompatibleInteger
    copy(IndexType n,
         const double *x, IndexType incX,
         double *y, IndexType incY);

Complex Single Precision

template <typename IndexType>
    typename If<IndexType>::isBlasCompatibleInteger
    copy(IndexType n,
         const ComplexFloat *x, IndexType incX,
         ComplexFloat *y, IndexType incY);

Complex Double Precision

template <typename IndexType>
    typename If<IndexType>::isBlasCompatibleInteger
    copy(IndexType n,
         const ComplexDouble *x, IndexType incX,
         ComplexDouble *y, IndexType incY);

Defined in namespace cxxblas. Function copy with 3 template parameters.

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