AMP-inner_product

Functions
template<typename InputIterator , typename OutputType >
OutputType	bolt::amp::inner_product (bolt::amp::control &ctl, InputIterator first1, InputIterator last1, InputIterator first2, OutputType init)
	Inner Product returns the inner product of two iterators. This is similar to calculating binary transform and then reducing the result. The inner_product operation is similar the std::inner_product function. This function can take optional control structure to control command-queue.
template<typename InputIterator , typename OutputType >
OutputType	bolt::amp::inner_product (InputIterator first1, InputIterator last1, InputIterator first2, OutputType init)
template<typename InputIterator , typename OutputType , typename BinaryFunction1 , typename BinaryFunction2 >
OutputType	bolt::amp::inner_product (bolt::amp::control &ctl, InputIterator first1, InputIterator last1, InputIterator first2, OutputType init, BinaryFunction1 f1, BinaryFunction2 f2)
	Inner Product returns the inner product of two iterators using user specified binary functors f1 and f2. This is similar to calculating transform and then reducing the result. The functor f1 should be commutative. This function can take optional control structure to control command-queue. The inner_product operation is similar the std::inner_product function.
template<typename InputIterator , typename OutputType , typename BinaryFunction1 , typename BinaryFunction2 >
OutputType	bolt::amp::inner_product (InputIterator first1, InputIterator last1, InputIterator first2, OutputType init, BinaryFunction1 f1, BinaryFunction2 f2)

Detailed Description

Function Documentation

template<typename InputIterator , typename OutputType >

OutputType bolt::amp::inner_product	(	bolt::amp::control &	ctl,
		InputIterator	first1,
		InputIterator	last1,
		InputIterator	first2,
		OutputType	init
	)

Inner Product returns the inner product of two iterators. This is similar to calculating binary transform and then reducing the result. The inner_product operation is similar the std::inner_product function. This function can take optional control structure to control command-queue.

Parameters

ctl	Optional Control structure to control accelerator, debug, tuning, etc.See bolt::amp::control.
first1	The beginning of input sequence.
last1	The end of input sequence.
first2	The beginning of the second input sequence.
init	The initial value for the accumulator.

Template Parameters

InputIterator	An iterator that can be dereferenced for an object, and can be incremented to get to the next element in a sequence.
OutputType	The type of the result.

Returns

The result of the inner product.

The following code example shows the use of inner_product to perform dot product on two vectors of size 10 , using the default multiplies and plus operator.

#include <bolt/amp/inner_product.h>

int a[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
    int b[10] = {1, 1, 2, 3, 5, 8, 13, 21, 34, 55};

int ip = bolt::amp::inner_product(a, a+10, b,0);
// sum = 1209

See Also

http://www.sgi.com/tech/stl/inner_product.html

template<typename InputIterator , typename OutputType , typename BinaryFunction1 , typename BinaryFunction2 >

OutputType bolt::amp::inner_product	(	bolt::amp::control &	ctl,
		InputIterator	first1,
		InputIterator	last1,
		InputIterator	first2,
		OutputType	init,
		BinaryFunction1	f1,
		BinaryFunction2	f2
	)

Inner Product returns the inner product of two iterators using user specified binary functors f1 and f2. This is similar to calculating transform and then reducing the result. The functor f1 should be commutative. This function can take optional control structure to control command-queue. The inner_product operation is similar the std::inner_product function.

Parameters

ctl	Control structure to control accelerator, debug, tuning, etc.See bolt::amp::control.
first1	The first position in the input sequence.
last1	The last position in the input sequence.
first2	The beginning of second input sequence.
init	The initial value for the accumulator.
f1	Binary functor for reduction.
f2	Binary functor for transformation.

Template Parameters

InputIterator	An iterator that can be dereferenced for an object, and can be incremented to get to the next element in a sequence.
OutputType	The type of the result.

Returns

The result of the inner product.

The following code example shows the use of inner_product on two vectors of size 10, using the user defined functors.

#include <bolt/amp/functional.h>    //for bolt::amp::plus
#include <bolt/amp/inner_product.h>

int a[10] = {-5,  0,  2,  3,  2,  4, -2,  1,  2,  3};
    int b[10] = {-5,  0,  2,  3,  2,  4, -2,  1,  2,  3};

int ip = bolt::amp::inner_product(a, a+10, b, 0, bolt::amp::plus<int>(),bolt::amp::multiplies<int>());
// sum = 76

See Also

http://www.sgi.com/tech/stl/inner_product.html