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* _mm_loaddup_pd is slow

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* optimize SSE ei_ploaddup<Packet4f>
This commit is contained in:
Gael Guennebaud
2010-07-19 15:43:27 +02:00
parent cd0e5dca9b
commit f8aae7a908
1 changed files with 2 additions and 7 deletions
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9
Eigen/src/Core/arch/SSE/PacketMath.h
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@@ -114,12 +114,9 @@ template<> EIGEN_STRONG_INLINE Packet4f ei_pset1<Packet4f>(const float& from) {
return ei_vec4f_swizzle1(res,0,0,0,0); return ei_vec4f_swizzle1(res,0,0,0,0);
} }
template<> EIGEN_STRONG_INLINE Packet2d ei_pset1<Packet2d>(const double& from) { template<> EIGEN_STRONG_INLINE Packet2d ei_pset1<Packet2d>(const double& from) {
#ifdef EIGEN_VECTORIZE_SSE3 // NOTE the SSE3 intrinsic _mm_loaddup_pd is never faster but sometimes much slower
return _mm_loaddup_pd(&from);
#else
Packet2d res = _mm_set_sd(from); Packet2d res = _mm_set_sd(from);
return ei_vec2d_swizzle1(res, 0, 0); return ei_vec2d_swizzle1(res, 0, 0);
#endif
} }
#else #else
template<> EIGEN_STRONG_INLINE Packet4f ei_pset1<Packet4f>(const float& from) { return _mm_set1_ps(from); } template<> EIGEN_STRONG_INLINE Packet4f ei_pset1<Packet4f>(const float& from) { return _mm_set1_ps(from); }
@@ -259,9 +256,7 @@ template<> EIGEN_STRONG_INLINE Packet4i ei_ploadu<Packet4i>(const int* from)
template<> EIGEN_STRONG_INLINE Packet4f ei_ploaddup<Packet4f>(const float* from) template<> EIGEN_STRONG_INLINE Packet4f ei_ploaddup<Packet4f>(const float* from)
{ {
Packet4f tmp; return ei_vec4f_swizzle1(_mm_castpd_ps(_mm_load_sd((const double*)from)), 0, 0, 1, 1);
tmp = _mm_loadl_pi(tmp,(__m64*)from);
return ei_vec4f_swizzle1(tmp, 0, 0, 1, 1);
} }
template<> EIGEN_STRONG_INLINE Packet2d ei_ploaddup<Packet2d>(const double* from) template<> EIGEN_STRONG_INLINE Packet2d ei_ploaddup<Packet2d>(const double* from)
{ return ei_pset1<Packet2d>(from[0]); } { return ei_pset1<Packet2d>(from[0]); }