diff options
| author |  Gael Guennebaud <g.gael@free.fr> | 2016-11-22 21:41:30 +0100 |
|---|---|---|
| committer | Gael Guennebaud <g.gael@free.fr> | 2016-11-22 21:41:30 +0100 |
| commit | 7dd894e40e439a6d1f4aed659d1375d65589cff3 (patch) | |
| tree | 3a7e216ba989832cd46047488314b30f963dbf33 /Eigen/src/Core/arch/AVX | |
| parent | f3fb0a1940c93c2eea2342b20506d652050ff48b (diff) | |
Optimize predux<Packet4d> (AVX)
Diffstat (limited to 'Eigen/src/Core/arch/AVX')
| -rw-r--r-- | Eigen/src/Core/arch/AVX/PacketMath.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/Eigen/src/Core/arch/AVX/PacketMath.h b/Eigen/src/Core/arch/AVX/PacketMath.h index e60ef307b..190e9a42b 100644 --- a/Eigen/src/Core/arch/AVX/PacketMath.h +++ b/Eigen/src/Core/arch/AVX/PacketMath.h @@ -401,8 +401,7 @@ template<> EIGEN_STRONG_INLINE float predux<Packet8f>(const Packet8f& a) } template<> EIGEN_STRONG_INLINE double predux<Packet4d>(const Packet4d& a) { - Packet4d tmp0 = _mm256_hadd_pd(a,_mm256_permute2f128_pd(a,a,1)); - return pfirst(_mm256_hadd_pd(tmp0,tmp0)); + return predux(_mm_add_pd(_mm256_castpd256_pd128(a),_mm256_extractf128_pd(a,1))); } template<> EIGEN_STRONG_INLINE Packet4f predux_downto4<Packet8f>(const Packet8f& a) |