devtools/eigen
1
0
Fork 0
mirror of https://gitlab.com/libeigen/eigen.git synced 2026-04-10 11:34:33 +08:00
Code Issues Packages Projects Releases Wiki Activity

Unify SSE/AVX psin functions.

Browse Source 
It is based on the SSE version which is much more accurate, though very slightly slower.
This changeset also includes the following required changes:
 - add packet-float to packet-int type traits
 - add packet float<->int reinterpret casts
 - add faster pselect for AVX based on blendv
This commit is contained in:
Gael Guennebaud
2018-11-27 22:41:51 +01:00
parent 08edbc8cfe
commit fa7fd61eda
10 changed files with 171 additions and 168 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
Eigen/src/Core/GenericPacketMath.h
View File

@@ -151,6 +151,11 @@ pcast(const SrcPacket& a, const SrcPacket& /*b*/, const SrcPacket& /*c*/, const
return static_cast<TgtPacket>(a);
}
/** \internal \returns reinterpret_cast<Target>(a) */
template <typename Target, typename Packet>
EIGEN_DEVICE_FUNC inline Target
preinterpret(const Packet& a); /* { return reinterpret_cast<const Target&>(a); } */
/** \internal \returns a + b (coeff-wise) */
template<typename Packet> EIGEN_DEVICE_FUNC inline Packet
padd(const Packet& a,
@@ -214,6 +219,10 @@ pxor(const Packet& a, const Packet& b) { return a ^ b; }
template<typename Packet> EIGEN_DEVICE_FUNC inline Packet
pandnot(const Packet& a, const Packet& b) { return a & (!b); }
/** \internal \returns \a a shifted by n bits */
template<typename Packet> EIGEN_DEVICE_FUNC inline Packet
pshiftleft(const Packet& a, int n); /* { return a << n; } */
/** \internal \returns the significant and exponent of the underlying floating point numbers
* See https://en.cppreference.com/w/cpp/numeric/math/frexp
*/