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Disable vectorized pow for half/bfloat16.

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We are potentially seeing some accuracy issues with these.  Ideally we
would hand off to `float`, but that's not trivial with the current
setup.

We may want to consider adding `ppow<Packet>` and `HasPow`, so
implementations can more easily specialize this.
This commit is contained in:
Antonio Sanchez 2021-02-05 12:17:34 -08:00
parent f85038b7f3
commit abcde69a79
1 changed files with 5 additions and 3 deletions
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8
Eigen/src/Core/functors/BinaryFunctors.h
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@ -435,12 +435,14 @@ struct functor_traits<scalar_pow_op<Scalar,Exponent> > {
Cost = 5 * NumTraits<Scalar>::MulCost, Cost = 5 * NumTraits<Scalar>::MulCost,
PacketAccess = (!NumTraits<Scalar>::IsComplex && !NumTraits<Scalar>::IsInteger && PacketAccess = (!NumTraits<Scalar>::IsComplex && !NumTraits<Scalar>::IsInteger &&
packet_traits<Scalar>::HasExp && packet_traits<Scalar>::HasLog && packet_traits<Scalar>::HasExp && packet_traits<Scalar>::HasLog &&
packet_traits<Scalar>::HasRound && packet_traits<Scalar>::HasCmp) packet_traits<Scalar>::HasRound && packet_traits<Scalar>::HasCmp &&
// Temporarly disable packet access for half/bfloat16 until
// accuracy is improved.
!is_same<Scalar, half>::value && !is_same<Scalar, bfloat16>::value
)
}; };
}; };
//---------- non associative binary functors ---------- //---------- non associative binary functors ----------
/** \internal /** \internal