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Optimize predux<Packet8f> (AVX)

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(grafted from 74637fa4e39afc0c6784588e9545b454bb5ea407
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This commit is contained in:
Gael Guennebaud 2016-11-22 21:57:52 +01:00
parent 0eff51e2ed
commit d6b9bc1ccd
1 changed files with 1 additions and 3 deletions
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4
Eigen/src/Core/arch/AVX/PacketMath.h
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@ -395,9 +395,7 @@ template<> EIGEN_STRONG_INLINE Packet4d preduxp<Packet4d>(const Packet4d* vecs)
template<> EIGEN_STRONG_INLINE float predux<Packet8f>(const Packet8f& a)
{
Packet8f tmp0 = _mm256_hadd_ps(a,_mm256_permute2f128_ps(a,a,1));
tmp0 = _mm256_hadd_ps(tmp0,tmp0);
return pfirst(_mm256_hadd_ps(tmp0, tmp0));
return predux(_mm_add_ps(_mm256_castps256_ps128(a),_mm256_extractf128_ps(a,1)));
}
template<> EIGEN_STRONG_INLINE double predux<Packet4d>(const Packet4d& a)
{