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> XSIMD_INLINE batch< T, A > haddp (batch< T, A > const *row) noexcept

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

Parameters:

row – an array of N batches

Returns:

the result of the reduction.

template<class T, class A, class F> XSIMD_INLINE T reduce (F &&f, batch< T, A > const &x) noexcept

Generic reducer using only batch operations.

Parameters:

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

• x – batch involved in the reduction

Returns:

the result of the reduction, as a scalar.

template<class T, class A> XSIMD_INLINE T reduce_add (batch< T, A > const &x) noexcept

Adds all the scalars of the batch x.

Parameters:

x – batch involved in the reduction

Returns:

the result of the reduction.

template<class T, class A> XSIMD_INLINE T reduce_max (batch< T, A > const &x) noexcept

Max of all the scalars of the batch x.

Parameters:

x – batch involved in the reduction

Returns:

the result of the reduction.

template<class T, class A> XSIMD_INLINE T reduce_min (batch< T, A > const &x) noexcept

Min of all the scalars of the batch x.

Parameters:

x – batch involved in the reduction

Returns:

the result of the reduction.