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bug #1652: implements a much more accurate version of vectorized sin/cos. This new version achieve same speed for SSE/AVX, and is slightly faster with FMA. Guarantees are as follows:

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- no FMA: 1ULP up to 3pi, 2ULP up to sin(25966) and cos(18838), fallback to std::sin/cos for larger inputs
  - FMA: 1ULP up to sin(117435.992) and cos(71476.0625), fallback to std::sin/cos for larger inputs
This commit is contained in:
Gael Guennebaud
2019-01-09 15:25:17 +01:00
parent e70ffef967
commit e6b217b8dd
5 changed files with 181 additions and 75 deletions
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11
Eigen/src/Core/arch/SSE/PacketMath.h
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@@ -812,6 +812,17 @@ template<> EIGEN_STRONG_INLINE int predux_max<Packet4i>(const Packet4i& a)
#endif // EIGEN_VECTORIZE_SSE4_1
}
// not needed yet
// template<> EIGEN_STRONG_INLINE bool predux_all(const Packet4f& x)
// {
// return _mm_movemask_ps(x) == 0xF;
// }
template<> EIGEN_STRONG_INLINE bool predux_any(const Packet4f& x)
{
return _mm_movemask_ps(x) != 0x0;
}
#if EIGEN_COMP_GNUC
// template <> EIGEN_STRONG_INLINE Packet4f pmadd(const Packet4f& a, const Packet4f& b, const Packet4f& c)
// {