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author | Rasmus Munk Larsen <rmlarsen@google.com> | 2019-08-27 11:30:31 -0700 |
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committer | Rasmus Munk Larsen <rmlarsen@google.com> | 2019-08-27 11:30:31 -0700 |
commit | b021cdea6dd84b0f51dd7aea691d47dd3eab8e9d (patch) | |
tree | fe710bcd0723cd3885e9d832cb78f6b25bda1df9 /Eigen/src/Core/arch/SSE/TypeCasting.h | |
parent | 84fefdf32155f9bbba403b44c961c437eaeac993 (diff) |
Clean up float16 a.k.a. Eigen::half support in Eigen. Move the definition of half to Core/arch/Default and move arch-specific packet ops to their respective sub-directories.
Diffstat (limited to 'Eigen/src/Core/arch/SSE/TypeCasting.h')
-rw-r--r-- | Eigen/src/Core/arch/SSE/TypeCasting.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/Eigen/src/Core/arch/SSE/TypeCasting.h b/Eigen/src/Core/arch/SSE/TypeCasting.h index f607366f0..1b8e9a550 100644 --- a/Eigen/src/Core/arch/SSE/TypeCasting.h +++ b/Eigen/src/Core/arch/SSE/TypeCasting.h @@ -77,6 +77,57 @@ template<> EIGEN_STRONG_INLINE Packet4f preinterpret<Packet4f,Packet4i>(const Pa return _mm_castsi128_ps(a); } + +// Disable the following code since it's broken on too many platforms / compilers. +//#elif defined(EIGEN_VECTORIZE_SSE) && (!EIGEN_ARCH_x86_64) && (!EIGEN_COMP_MSVC) +#if 0 + +template <> +struct type_casting_traits<Eigen::half, float> { + enum { + VectorizedCast = 1, + SrcCoeffRatio = 1, + TgtCoeffRatio = 1 + }; +}; + +template<> EIGEN_STRONG_INLINE Packet4f pcast<Packet4h, Packet4f>(const Packet4h& a) { + __int64_t a64 = _mm_cvtm64_si64(a.x); + Eigen::half h = raw_uint16_to_half(static_cast<unsigned short>(a64)); + float f1 = static_cast<float>(h); + h = raw_uint16_to_half(static_cast<unsigned short>(a64 >> 16)); + float f2 = static_cast<float>(h); + h = raw_uint16_to_half(static_cast<unsigned short>(a64 >> 32)); + float f3 = static_cast<float>(h); + h = raw_uint16_to_half(static_cast<unsigned short>(a64 >> 48)); + float f4 = static_cast<float>(h); + return _mm_set_ps(f4, f3, f2, f1); +} + +template <> +struct type_casting_traits<float, Eigen::half> { + enum { + VectorizedCast = 1, + SrcCoeffRatio = 1, + TgtCoeffRatio = 1 + }; +}; + +template<> EIGEN_STRONG_INLINE Packet4h pcast<Packet4f, Packet4h>(const Packet4f& a) { + EIGEN_ALIGN16 float aux[4]; + pstore(aux, a); + Eigen::half h0(aux[0]); + Eigen::half h1(aux[1]); + Eigen::half h2(aux[2]); + Eigen::half h3(aux[3]); + + Packet4h result; + result.x = _mm_set_pi16(h3.x, h2.x, h1.x, h0.x); + return result; +} + +#endif + } // end namespace internal } // end namespace Eigen |