Miscellaneous

Sign manipulation:

sign()	per slot sign extraction
signnz()	per slot sign extraction on non null elements
bitofsign()	per slot sign bit extraction
copysign()	per slot sign copy

Stream operation:

operator<<()

batch pretty-printing

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template <class T, class A>

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

Computes the bit of sign of x.

Return

bit of sign of x

Parameters

• x: batch of scalar

template <class T, class A>

XSIMD_INLINE batch<T, A> xsimd::copysign(batch< T, A > const & x, batch< T, A > const & y)

Computes a value whose absolute value matches that of x, but whose sign bit matches that of y.

Return

batch whose absolute value matches that of x, but whose sign bit matches that of y.

Parameters

• x: batch of scalars

• y: batch of scalars

template <class T, class A>

XSIMD_INLINE batch<T, A> xsimd::select(batch_bool< T, A > const & cond, batch< T, A > const & true_br, batch< T, A > const & false_br)

Ternary operator for batches: selects values from the batches true_br or false_br depending on the boolean values in the constant batch cond.

Equivalent to

for(std::size_t i = 0; i < N; ++i)
    res[i] = cond[i] ? true_br[i] : false_br[i];

Return

the result of the selection.

Parameters

• cond: batch condition.

• true_br: batch values for truthy condition.

• false_br: batch value for falsy condition.

template <class T, class A>

XSIMD_INLINE batch<std::complex<T>, A> xsimd::select(batch_bool< T, A > const & cond, batch< std::complex< T >, A > const & true_br, batch< std::complex< T >, A > const & false_br)

Ternary operator for batches: selects values from the batches true_br or false_br depending on the boolean values in the constant batch cond.

Equivalent to

for(std::size_t i = 0; i < N; ++i)
    res[i] = cond[i] ? true_br[i] : false_br[i];

Return

the result of the selection.

Parameters

• cond: batch condition.

• true_br: batch values for truthy condition.

• false_br: batch value for falsy condition.

template <class T, class A, bool… Values>

XSIMD_INLINE batch<T, A> xsimd::select(batch_bool_constant< T, A, Values... > const & cond, batch< T, A > const & true_br, batch< T, A > const & false_br)

Ternary operator for batches: selects values from the batches true_br or false_br depending on the boolean values in the constant batch cond.

Equivalent to

for(std::size_t i = 0; i < N; ++i)
    res[i] = cond[i] ? true_br[i] : false_br[i];

Return

the result of the selection.

Parameters

• cond: constant batch condition.

• true_br: batch values for truthy condition.

• false_br: batch value for falsy condition.

template <class T, class A>

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

Computes the sign of x.

Return

-1 for each negative element, -1 or +1 for each null element and +1 for each element

Parameters

• x: batch

template <class T, class A>

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

Computes the sign of x, assuming x doesn’t have any zero.

Return

-1 for each negative element, -1 or +1 for each null element and +1 for each element

Parameters

• x: batch

template <class T, class A>

XSIMD_INLINE std::ostream& xsimd::operator<<(std::ostream & o, batch< T, A > const & x)

Dump the content of batch x to stream o.

Return

a reference to o

Parameters

• o: the stream where the batch is dumped

• x: batch to dump.

template <class T, class A>

XSIMD_INLINE std::ostream& xsimd::operator<<(std::ostream & o, batch_bool< T, A > const & x)

Dump the content of batch x to stream o.

Return

a reference to o

Parameters

• o: the stream where the batch is dumped

• x: batch to dump.