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Add TODO to cleanup FMA cost modelling.

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Rasmus Munk Larsen 2019-09-24 16:39:25 -07:00
parent 6de5ed08d8
commit 591a554c68
1 changed files with 1 additions and 0 deletions
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unsupported/Eigen/src/SpecialFunctions/SpecialFunctionsFunctors.h
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@ -259,6 +259,7 @@ struct functor_traits<scalar_erf_op<Scalar> > {
Cost = Cost =
(PacketAccess (PacketAccess
#ifdef EIGEN_VECTORIZE_FMA #ifdef EIGEN_VECTORIZE_FMA
// TODO(rmlarsen): Move the FMA cost model to a central location.
// Haswell can issue 2 add/mul/madd per cycle. // Haswell can issue 2 add/mul/madd per cycle.
// 10 pmadd, 2 pmul, 1 div, 2 other // 10 pmadd, 2 pmul, 1 div, 2 other
? (2 * NumTraits<Scalar>::AddCost + ? (2 * NumTraits<Scalar>::AddCost +