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let ei_pset1 use _mm_loaddup_pd. Not a significant speed improvement, but also not a speed regression, and replaces 3 instructions by 1 single instruction.

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This commit is contained in:
Benoit Jacob 2010-07-09 18:51:17 -04:00
parent 6ad3f1ab1f
commit 6dcd373b9d
1 changed files with 4 additions and 0 deletions
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4
Eigen/src/Core/arch/SSE/PacketMath.h
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@ -109,8 +109,12 @@ template<> EIGEN_STRONG_INLINE Packet4f ei_pset1<float>(const float& from) {
return ei_vec4f_swizzle1(res,0,0,0,0);
}
template<> EIGEN_STRONG_INLINE Packet2d ei_pset1<double>(const double& from) {
#ifdef EIGEN_VECTORIZE_SSE3
return _mm_loaddup_pd(&from);
#else
Packet2d res = _mm_set_sd(from);
return ei_vec2d_swizzle1(res, 0, 0);
#endif
}
#else
template<> EIGEN_STRONG_INLINE Packet4f ei_pset1<float>(const float& from) { return _mm_set1_ps(from); }