geru

Prototype

There is one prototype of geru available, please see below.

geru( const Scalar alpha, const VectorX& x, const VectorY& y,
        MatrixA& a );

Description

geru (short for TODO) provides a C++ interface to BLAS routines CGERU and ZGERU. geru performs the rank 1 operation

A := alpha*x*y' + A,

where alpha is a scalar, x is an m element vector, y is an n element vector and A is an m by n matrix.

The selection of the BLAS routine is done during compile-time, and is determined by the type of values contained in type VectorX. The type of values is obtained through the value_type meta-function typename value_type<VectorX>::type. Table X below illustrates to which specific routine this dispatching will take place.

Table 1.40. Dispatching of geru.

Value type of VectorX	BLAS routine	CBLAS routine	CUBLAS routine
`complex<float>`	CGERU	cblas_cgeru	cublasCgeru
`complex<double>`	ZGERU	cblas_zgeru	Unavailable

The original routines CGERU and ZGERU have nine arguments, whereas geru requires four arguments.

Table 1.41. Deduction of arguments of geru.

Definition

Defined in header boost/numeric/bindings/blas/level2/geru.hpp.

Parameters or Requirements on Types

Parameters

MatrixA

The definition of term 1

MatrixB

The definition of term 2

MatrixC

The definition of term 3.

Definitions may contain paragraphs.

Complexity

Example

#include <boost/numeric/bindings/blas/level2/geru.hpp>
using namespace boost::numeric::bindings;

blas::geru( x, y, z );

this will output

[5] 0 1 2 3 4 5