##### prec_dot

###### Prototype

There is one prototype of `prec_dot` available, please see below.

    prec_dot( const VectorX& x, const VectorY& y );

###### Description

`prec_dot` (short for TODO) provides a C++ interface to BLAS routines DSDOT. precision accumulation and result.

Returns D.P. dot product accumulated in D.P., for S.P. SX and SY `prec_dot` = sum for I = 0 to N-1 of SX(LX+I*INCX) * SY(LY+I*INCY), where LX = 1 if INCX .GE. 0, else LX = 1+(1-N)*INCX, and LY is defined in a similar way using INCY.

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 1.18. Dispatching of prec_dot.

Value type of VectorX | BLAS routine | CBLAS routine | CUBLAS routine
--- | --- | --- | ---
`double` | DSDOT | cblas_dsdot | Unavailable

The original routines DSDOT have five arguments, whereas `prec_dot` requires two arguments.

Table 1.19. Deduction of arguments of prec_dot.

###### Definition

Defined in header `boost/numeric/bindings/blas/level1/prec_dot.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/level1/prec_dot.hpp>
    using namespace boost::numeric::bindings;

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

this will output

    [5] 0 1 2 3 4 5

###### Notes

###### See Also

- Originating Fortran source files dsdot.f at Netlib.