Reduction operators

reduce()	generic batch reduction
reduce_add()	sum of each batch element
reduce_max()	max of the batch elements
reduce_min()	min of the batch elements
haddp()	horizontal sum across batches

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template <class T, class A>

batch<T, A> xsimd::haddp(batch<T, A> const *row)

Parallel horizontal addition: adds the scalars of each batch in the array pointed by row and store them in a returned batch.

Return

the result of the reduction.

Parameters

• row: an array of N batches

template <class T, class A, class F>

T xsimd::reduce(F &&f, batch<T, A> const &x)

Generic reducer using only batch operations.

Return

the result of the reduction, as a scalar.

Parameters

• f: reducing function, accepting batch ()(batch, batch)

• x: batch involved in the reduction

template <class T, class A>

T xsimd::reduce_add(batch<T, A> const &x)

Adds all the scalars of the batch x.

Return

the result of the reduction.

Parameters

• x: batch involved in the reduction

template <class T, class A>

T xsimd::reduce_max(batch<T, A> const &x)

Max of all the scalars of the batch x.

Return

the result of the reduction.

Parameters

• x: batch involved in the reduction

template <class T, class A>

T xsimd::reduce_min(batch<T, A> const &x)

Min of all the scalars of the batch x.

Return

the result of the reduction.

Parameters

• x: batch involved in the reduction