EBGeometry::TriangleSoA Namespace Reference

Namespace for TriangleSoAT-related compile-time utilities. More...

Functions
template<typename T >
constexpr size_t	DefaultWidth () noexcept
	Returns the SIMD-optimal SoA width (triangles per TriangleSoAT group) for type T on the current target ISA.

Detailed Description

Namespace for TriangleSoAT-related compile-time utilities.

Function Documentation

DefaultWidth()

template<typename T >

constexpr size_t EBGeometry::TriangleSoA::DefaultWidth ( )

constexprnoexcept

Returns the SIMD-optimal SoA width (triangles per TriangleSoAT group) for type T on the current target ISA.

Maps the floating-point type and the compile-time ISA to the W that fills one SIMD register exactly, matching the paths TriangleSoAT::signedDistance() actually implements. Not a member of TriangleSoAT itself: that class is templated on W, so a member couldn't be used to compute W's own default (the same reason BVH::DefaultBranchingRatio<T>() is a free function in namespace BVH rather than a member of TreeBVH).

ISA	T=float	T=double
AVX-512F	16	8
AVX	8	4
otherwise	4	4

Usage: size_t W = EBGeometry::TriangleSoA::DefaultWidth<T>() as a template-parameter default.

Template Parameters

T	Floating-point precision type (float or double).

Returns

Optimal W for the current ISA and T.