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

---

template <class T, class A>

XSIMD_INLINE 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>

XSIMD_INLINE 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>

XSIMD_INLINE 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>

XSIMD_INLINE 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>

XSIMD_INLINE 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