Interval
#include <poplar/Interval.hpp>
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namespace poplar
Poplar classes and functions.
A VectorList is a list of vectors with a specific layout and with the usage semantics of a 2D vector.
A 1D vector must be laid out in a contiguous memory region. A 2D vector is a vector of 1D vectors. Each of these 1D vectors that make up a 2D vector is called a “sub-vector” for the remainder of this document. The elements of a 2D vector can be accessed by indexing the 2D vector along the
outer
andinner
dimensions asA[outer][inner]
.The following two categories of layouts are supported:
VectorListLayout::DELTANELEMENTS
is a memory efficient 2D vector layout. For legacy systemsVectorListLayout::DELTAN
served a similar purpose. Each sub-vector must be laid out as a contiguous memory region but the sub-vectors may may not be laid out contiguous with respect to each other in memory. Each sub-vector may have a different length.VectorListLayout::ONE_PTR
and otherVectorListLayout
layouts that are prefixed by SCALED_PTR are for Poplar runtime use only.
Typedefs
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typedef GenericInterval<std::size_t> Interval
Functions
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template<class T>
inline bool operator==(const GenericInterval<T> &a, const GenericInterval<T> &b)
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template<class T>
inline bool operator<(const GenericInterval<T> &a, const GenericInterval<T> &b)
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template<class T>
inline bool operator!=(const GenericInterval<T> &a, const GenericInterval<T> &b)
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template<class T>
inline bool operator>=(const GenericInterval<T> &a, const GenericInterval<T> &b)
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template<class T>
inline bool operator>(const GenericInterval<T> &a, const GenericInterval<T> &b)
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template<class T>
inline bool operator<=(const GenericInterval<T> &a, const GenericInterval<T> &b)
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template<class T>
inline std::ostream &operator<<(std::ostream &os, const GenericInterval<T> &b)
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template<class T>
struct GenericInterval - #include <Interval.hpp>
This class represents an interval that is closed at its lower bound and open at its upper bound.
It is almost always used with T = std::size_t, for which there is a convenient Interval typedef.
Public Functions
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GenericInterval() = default
Initialise with begin and end set to their default value of 0.
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inline const T &lower() const
Get the lower bound of the half open interval.
- Returns
the lower bound of the interval.
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GenericInterval() = default