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Created the pblend packet primitive and implemented it using SSE and AVX instructions.

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This commit is contained in:
Benoit Steiner
2014-06-06 20:18:44 -07:00
parent 79085e08e9
commit 29aebf96e6
5 changed files with 90 additions and 4 deletions
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41
Eigen/src/Core/arch/SSE/PacketMath.h
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@@ -108,7 +108,8 @@ template<> struct packet_traits<float> : default_packet_traits
HasCos = EIGEN_FAST_MATH,
HasLog = 1,
HasExp = 1,
HasSqrt = 1
HasSqrt = 1,
HasBlend = 1
};
};
template<> struct packet_traits<double> : default_packet_traits
@@ -123,7 +124,8 @@ template<> struct packet_traits<double> : default_packet_traits
HasDiv = 1,
HasExp = 1,
HasSqrt = 1
HasSqrt = 1,
HasBlend = 1
};
};
#endif
@@ -135,7 +137,9 @@ template<> struct packet_traits<int> : default_packet_traits
// FIXME check the Has*
Vectorizable = 1,
AlignedOnScalar = 1,
size=4
size=4,
HasBlend = 1
};
};
@@ -809,6 +813,37 @@ ptranspose(PacketBlock<Packet4i,4>& kernel) {
kernel.packet[3] = _mm_unpackhi_epi64(T2, T3);
}
template<> EIGEN_STRONG_INLINE Packet4i pblend(const Selector<4>& ifPacket, const Packet4i& thenPacket, const Packet4i& elsePacket) {
const __m128i zero = _mm_setzero_si128();
const __m128i select = _mm_set_epi32(ifPacket.select[3], ifPacket.select[2], ifPacket.select[1], ifPacket.select[0]);
__m128i false_mask = _mm_cmpeq_epi32(select, zero);
#ifdef EIGEN_VECTORIZE_SSE4_1
return _mm_blendv_epi8(thenPacket, elsePacket, false_mask);
#else
return _mm_or_si128(_mm_andnot_si128(false_mask, thenPacket), _mm_and_si128(false_mask, elsePacket));
#endif
}
template<> EIGEN_STRONG_INLINE Packet4f pblend(const Selector<4>& ifPacket, const Packet4f& thenPacket, const Packet4f& elsePacket) {
const __m128 zero = _mm_setzero_ps();
const __m128 select = _mm_set_ps(ifPacket.select[3], ifPacket.select[2], ifPacket.select[1], ifPacket.select[0]);
__m128 false_mask = _mm_cmpeq_ps(select, zero);
#ifdef EIGEN_VECTORIZE_SSE4_1
return _mm_blendv_ps(thenPacket, elsePacket, false_mask);
#else
return _mm_or_ps(_mm_andnot_ps(false_mask, thenPacket), _mm_and_ps(false_mask, elsePacket));
#endif
}
template<> EIGEN_STRONG_INLINE Packet2d pblend(const Selector<2>& ifPacket, const Packet2d& thenPacket, const Packet2d& elsePacket) {
const __m128d zero = _mm_setzero_pd();
const __m128d select = _mm_set_pd(ifPacket.select[1], ifPacket.select[0]);
__m128d false_mask = _mm_cmpeq_pd(select, zero);
#ifdef EIGEN_VECTORIZE_SSE4_1
return _mm_blendv_pd(thenPacket, elsePacket, false_mask);
#else
return _mm_or_pd(_mm_andnot_pd(false_mask, thenPacket), _mm_and_pd(false_mask, elsePacket));
#endif
}
} // end namespace internal
} // end namespace Eigen