Reshaping

Overview

AIE API provides operations to change the location of the elements within a vector and to combine the elements from two or more vectors.

Functions
template<Vector Vec>
auto	aie::filter_even (const Vec &v, unsigned step=1) -> vector< typename Vec::value_type, Vec::size()/2 >
	More...
template<Vector Vec>
auto	aie::filter_odd (const Vec &v, unsigned step=1) -> vector< typename Vec::value_type, Vec::size()/2 >
	More...
template<Vector Vec1, Vector Vec2>
auto	aie::interleave_unzip (const Vec1 &v1, const Vec2 &v2, unsigned step) -> std::pair< aie_dm_resource_remove_t< Vec1 >, aie_dm_resource_remove_t< Vec1 >>
	More...
template<Vector Vec1, Vector Vec2>
auto	aie::interleave_zip (const Vec1 &v1, const Vec2 &v2, unsigned step) -> std::pair< aie_dm_resource_remove_t< Vec1 >, aie_dm_resource_remove_t< Vec1 >>
	More...
template<Vector Vec>
auto	aie::reverse (const Vec &v) -> aie_dm_resource_remove_t< Vec >
	More...
template<Elem E1, Elem E2, Mask M>
vector< operand_base_type_t< E1 >, M::size()>	aie::select (const E1 &a, const E2 &b, const M &m)
	More...
template<Vector Vec, Elem E, Mask M>
auto	aie::select (const Vec &v, E a, const M &m) -> aie_dm_resource_remove_t< Vec >
	More...
template<Vector Vec1, Vector Vec2, Mask M>
auto	aie::select (const Vec1 &v1, const Vec2 &v2, const M &m) -> aie_dm_resource_remove_t< Vec1 >
	More...
template<Elem E, Vector Vec, Mask M>
auto	aie::select (E a, const Vec &v, const M &m) -> aie_dm_resource_remove_t< Vec >
	More...
template<Vector Vec>
auto	aie::shuffle_down (const Vec &v, unsigned n) -> aie_dm_resource_remove_t< Vec >
	More...
template<Vector Vec>
auto	aie::shuffle_down_fill (const Vec &v, const Vec &fill, unsigned n) -> aie_dm_resource_remove_t< Vec >
	More...
template<Vector Vec>
auto	aie::shuffle_down_replicate (const Vec &v, unsigned n) -> aie_dm_resource_remove_t< Vec >
	More...
template<Vector Vec>
auto	aie::shuffle_down_rotate (const Vec &v, unsigned n) -> aie_dm_resource_remove_t< Vec >
	More...
template<Vector Vec>
auto	aie::shuffle_up (const Vec &v, unsigned n) -> aie_dm_resource_remove_t< Vec >
	More...
template<Vector Vec>
auto	aie::shuffle_up_fill (const Vec &v, const Vec &fill, unsigned n) -> aie_dm_resource_remove_t< Vec >
	More...
template<Vector Vec>
auto	aie::shuffle_up_replicate (const Vec &v, unsigned n) -> aie_dm_resource_remove_t< Vec >
	More...
template<Vector Vec>
auto	aie::shuffle_up_rotate (const Vec &v, unsigned n) -> aie_dm_resource_remove_t< Vec >
	More...
template<Vector Vec>
auto	aie::transpose (const Vec &v, unsigned Row, unsigned Col) -> aie_dm_resource_remove_t< Vec >
	More...

Function Documentation

filter_even()

template<Vector Vec>

auto aie::filter_even	(	const Vec &	v,
		unsigned	step = 1
	)		-> vector<typename Vec::value_type, Vec::size() / 2>

Returns a vector of half the size whose contents follow the following pattern.

out = { a[0:step], a[2*step:3*step], ... }
#

Parameters

v	Input vector. Must meet Vector.
step	Number of contiguous elements taken from the input vector. Must be a power of two.

filter_odd()

template<Vector Vec>

auto aie::filter_odd	(	const Vec &	v,
		unsigned	step = 1
	)		-> vector<typename Vec::value_type, Vec::size() / 2>

Returns a vector of half the size whose contents follow the following pattern.

out = { a[step:2*step], a[3*step:4*step], ... }
#

Parameters

v	Input vector. Must meet Vector.
step	Number of contiguous elements taken from the input vector. Must be a power of two.

interleave_unzip()

template<Vector Vec1, Vector Vec2>

auto aie::interleave_unzip	(	const Vec1 &	v1,
		const Vec2 &	v2,
		unsigned	step
	)		-> std::pair<aie_dm_resource_remove_t<Vec1>, aie_dm_resource_remove_t<Vec1>>

Picks elements sequentially from the input vectors and writes them alternatively into the output vectors.

out = { a[0:step], a[2*step:3*step], ..., b[0:step], b[2*step:3*step], ..., a[step:2*step], a[3*step:4*step], ..., b[step:2*step], b[3*step:4*step], ... }
#

Parameters

v1	First input vector. Must meet Vector.
v2	Second input vector. Must meet Vector.
step	Number of contiguous elements taken from each input vector. Must be a power of two.

interleave_zip()

template<Vector Vec1, Vector Vec2>

auto aie::interleave_zip	(	const Vec1 &	v1,
		const Vec2 &	v2,
		unsigned	step
	)		-> std::pair<aie_dm_resource_remove_t<Vec1>, aie_dm_resource_remove_t<Vec1>>

Picks elements alternatively from the input vectors and writes them sequentially into the output vectors.

out = { a[0:step], b[0:step], a[step:2*step], b[step:2*step], ... }

Parameters

v1	First input vector. Must meet Vector.
v2	Second input vector. Must meet Vector.
step	Number of contiguous elements taken from each input vector. Must be a power of two.

reverse()

template<Vector Vec>

auto aie::reverse

(

const Vec &

v

)

-> aie_dm_resource_remove_t<Vec>

Returns a vector whose contents are the same as the input vector, but in reverse order.

for (unsigned i = 0; i < Elems; ++i)
    out[i] = in[Elems - i - 1];

Parameters

v	Input vector. The type must meet Vector.

select() [1/4]

template<Elem E1, Elem E2, Mask M>

vector<operand_base_type_t<E1>, M::size()> aie::select	(	const E1 &	a,
		const E2 &	b,
		const M &	m
	)

Combines the values of the input vector and value into a vector of the same size by using a mask that specifies which is the source input for each element of the output vector.

for (unsigned i = 0; i < Elems; ++i)
    out[i] = m[i] == 0? a : b;

Parameters

a	Input value. The type must meet Elem.
b	Input value. The type must meet Elem.
m	Mask that specifies the source input for each output element. The type must meet Mask.

select() [2/4]

template<Vector Vec, Elem E, Mask M>

auto aie::select	(	const Vec &	v,
		E	a,
		const M &	m
	)		-> aie_dm_resource_remove_t<Vec>

Combines the values of the input vector and value into a vector of the same size by using a mask that specifies which is the source input for each element of the output vector.

for (unsigned i = 0; i < Elems; ++i)
    out[i] = m[i] == 0? v[i] : a;

Parameters

v	Input vector. The type must meet Vector.
a	Input value. The type must meet Elem.
m	Mask that specifies the source input for each output element. The type must meet Mask.

select() [3/4]

template<Vector Vec1, Vector Vec2, Mask M>

auto aie::select	(	const Vec1 &	v1,
		const Vec2 &	v2,
		const M &	m
	)		-> aie_dm_resource_remove_t<Vec1>

Combines the values of the two input vectors into a vector of the same size by using a mask that specifies which is the source input for each element of the output vector.

for (unsigned i = 0; i < Elems; ++i)
    out[i] = m[i] == 0? v1[i] : v2[i];

Parameters

v1	First input vector. The type must meet Vector.
v2	Second input vector. The type must meet Vector.
m	Mask that specifies the source input for each output element. The type must meet Mask.

select() [4/4]

template<Elem E, Vector Vec, Mask M>

auto aie::select	(	E	a,
		const Vec &	v,
		const M &	m
	)		-> aie_dm_resource_remove_t<Vec>

Combines the values of the input value and vector into a vector of the same size by using a mask that specifies which is the source input for each element of the output vector.

for (unsigned i = 0; i < Elems; ++i)
    out[i] = m[i] == 0? a : v[i];

Parameters

a	Input value. The type must meet Elem.
v	Input vector. The type must meet Vector.
m	Mask that specifies the source input for each output element. The type must meet Mask.

shuffle_down()

template<Vector Vec>

auto aie::shuffle_down	(	const Vec &	v,
		unsigned	n
	)		-> aie_dm_resource_remove_t<Vec>

Returns a vector whose contents are the same as the input vector, but shifted down by n. Elements do not wrap around and new elements are undefined.

for (unsigned i = 0; i < Elems - n; ++i)
    out[i] = in[i + n]

Parameters

v	Input vector. The type must meet Vector.
n	Distance for the elements to be shifted.

shuffle_down_fill()

template<Vector Vec>

auto aie::shuffle_down_fill	(	const Vec &	v,
		const Vec &	fill,
		unsigned	n
	)		-> aie_dm_resource_remove_t<Vec>

Returns a vector whose contents are the same as the input vector, but shifted down by n. Elements do not wrap around and new elements are filled from a second vector.

for (unsigned i = 0; i < Elems - n; ++i)
    out[i] = in[i + n]
 
for (unsigned i = 0; i < n; ++i)
    out[i + Elems - n] = fill[i]

Parameters

v	Input vector. The type must meet Vector.
fill	Second input vector used to fill the elements in the upper part of the output vector.
n	Distance for the elements to be shifted.

shuffle_down_replicate()

template<Vector Vec>

auto aie::shuffle_down_replicate	(	const Vec &	v,
		unsigned	n
	)		-> aie_dm_resource_remove_t<Vec>

Returns a vector whose contents are the same as the input vector, but shifted down by n. Elements do not wrap around and new elements are copies of the last element of the input vector.

for (unsigned i = 0; i < Elems - n; ++i)
    out[i] = in[i + n]
 
for (unsigned i = Elems - n; i < Elems; ++i)
    out[i] = in[Elems - 1];

Parameters

v	Input vector. The type must meet Vector.
n	Distance for the elements to be shifted.

shuffle_down_rotate()

template<Vector Vec>

auto aie::shuffle_down_rotate	(	const Vec &	v,
		unsigned	n
	)		-> aie_dm_resource_remove_t<Vec>

Returns a vector whose contents are the same as the input vector, but shifted down by n (elements wrap around):

for (unsigned i = 0; i < Elems; ++i)
    out[i] = in[(i + n) % Elems]

Parameters

v	Input vector. The type must meet Vector.
n	Distance for the elements to be shifted.

shuffle_up()

template<Vector Vec>

auto aie::shuffle_up	(	const Vec &	v,
		unsigned	n
	)		-> aie_dm_resource_remove_t<Vec>

Returns a vector whose contents are the same as the input vector, but shifted up by n. Elements do not wrap around and new elements are undefined.

for (unsigned i = 0; i < Elems - n; ++i)
    out[i + n] = in[i]

Parameters

v	Input vector. The type must meet Vector.
n	Distance for the elements to be shifted.

shuffle_up_fill()

template<Vector Vec>

auto aie::shuffle_up_fill	(	const Vec &	v,
		const Vec &	fill,
		unsigned	n
	)		-> aie_dm_resource_remove_t<Vec>

Returns a vector whose contents are the same as the input vector, but shifted up by n. Elements do not wrap around and new elements are filled from a second vector.

for (unsigned i = 0; i < Elems - n; ++i)
    out[i + n] = in[i]
 
for (unsigned i = 0; i < n; ++i)
    out[i] = fill[i + Elems - n];

Parameters

v	Input vector. The type must meet Vector.
fill	Second input vector used to fill the elements in the lower part of the output vector.
n	Distance for the elements to be shifted.

shuffle_up_replicate()

template<Vector Vec>

auto aie::shuffle_up_replicate	(	const Vec &	v,
		unsigned	n
	)		-> aie_dm_resource_remove_t<Vec>

Returns a vector whose contents are the same as the input vector, but shifted up by n. Elements do not wrap around and new elements are copies of the first element of the input vector.

for (unsigned i = 0; i < Elems - n; ++i)
    out[i + n] = in[i]
 
for (unsigned i = 0; i < n; ++i)
    out[i] = in[0];

Parameters

v	Input vector. The type must meet Vector.
n	Distance for the elements to be shifted.

shuffle_up_rotate()

template<Vector Vec>

auto aie::shuffle_up_rotate	(	const Vec &	v,
		unsigned	n
	)		-> aie_dm_resource_remove_t<Vec>

Returns a vector whose contents are the same as the input vector, but shifted up by n (elements wrap around):

for (unsigned i = 0; i < Elems; ++i)
    out[i] = in[(i - n) % Elems]

Parameters

v	Input vector. The type must meet Vector.
n	Distance for the elements to be shifted.

transpose()

template<Vector Vec>

auto aie::transpose	(	const Vec &	v,
		unsigned	Row,
		unsigned	Col
	)		-> aie_dm_resource_remove_t<Vec>

The input vector is interpreted as a matrix of the dimensions specified by Row and Col, the function returns a vector ordered as the transpose of the specified matrix. For Row equal to 1, the input vector is returned.

Parameters

v	Input vector. The type must meet Vector, with number of elements equal to Row * Col.
Row	Number of rows of the input matrix shape.
Col	Number of cols of the input matrix shape.