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Diffstat (limited to 'Eigen/src/Core/arch/Default/ConjHelper.h')
| -rw-r--r-- | Eigen/src/Core/arch/Default/ConjHelper.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/Eigen/src/Core/arch/Default/ConjHelper.h b/Eigen/src/Core/arch/Default/ConjHelper.h new file mode 100644 index 000000000..53830b5a2 --- /dev/null +++ b/Eigen/src/Core/arch/Default/ConjHelper.h @@ -0,0 +1,117 @@ + +// This file is part of Eigen, a lightweight C++ template library +// for linear algebra. +// +// Copyright (C) 2017 Gael Guennebaud <gael.guennebaud@inria.fr> +// +// This Source Code Form is subject to the terms of the Mozilla +// Public License v. 2.0. If a copy of the MPL was not distributed +// with this file, You can obtain one at http://mozilla.org/MPL/2.0/. + +#ifndef EIGEN_ARCH_CONJ_HELPER_H +#define EIGEN_ARCH_CONJ_HELPER_H + +#define EIGEN_MAKE_CONJ_HELPER_CPLX_REAL(PACKET_CPLX, PACKET_REAL) \ + template <> \ + struct conj_helper<PACKET_REAL, PACKET_CPLX, false, false> { \ + EIGEN_STRONG_INLINE PACKET_CPLX pmadd(const PACKET_REAL& x, \ + const PACKET_CPLX& y, \ + const PACKET_CPLX& c) const { \ + return padd(c, this->pmul(x, y)); \ + } \ + EIGEN_STRONG_INLINE PACKET_CPLX pmul(const PACKET_REAL& x, \ + const PACKET_CPLX& y) const { \ + return PACKET_CPLX(Eigen::internal::pmul<PACKET_REAL>(x, y.v)); \ + } \ + }; \ + \ + template <> \ + struct conj_helper<PACKET_CPLX, PACKET_REAL, false, false> { \ + EIGEN_STRONG_INLINE PACKET_CPLX pmadd(const PACKET_CPLX& x, \ + const PACKET_REAL& y, \ + const PACKET_CPLX& c) const { \ + return padd(c, this->pmul(x, y)); \ + } \ + EIGEN_STRONG_INLINE PACKET_CPLX pmul(const PACKET_CPLX& x, \ + const PACKET_REAL& y) const { \ + return PACKET_CPLX(Eigen::internal::pmul<PACKET_REAL>(x.v, y)); \ + } \ + }; + +namespace Eigen { +namespace internal { + +template<bool Conjugate> struct conj_if; + +template<> struct conj_if<true> { + template<typename T> + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE T operator()(const T& x) const { return numext::conj(x); } + template<typename T> + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE T pconj(const T& x) const { return internal::pconj(x); } +}; + +template<> struct conj_if<false> { + template<typename T> + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const T& operator()(const T& x) const { return x; } + template<typename T> + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const T& pconj(const T& x) const { return x; } +}; + +// Generic Implementation, assume scalars since the packet-version is +// specialized below. +template<typename LhsType, typename RhsType, bool ConjLhs, bool ConjRhs> +struct conj_helper { + typedef typename ScalarBinaryOpTraits<LhsType, RhsType>::ReturnType ResultType; + + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ResultType + pmadd(const LhsType& x, const RhsType& y, const ResultType& c) const + { return this->pmul(x, y) + c; } + + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ResultType + pmul(const LhsType& x, const RhsType& y) const + { return conj_if<ConjLhs>()(x) * conj_if<ConjRhs>()(y); } +}; + +template<typename LhsScalar, typename RhsScalar> +struct conj_helper<LhsScalar, RhsScalar, true, true> { + typedef typename ScalarBinaryOpTraits<LhsScalar,RhsScalar>::ReturnType ResultType; + + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ResultType + pmadd(const LhsScalar& x, const RhsScalar& y, const ResultType& c) const + { return this->pmul(x, y) + c; } + + // We save a conjuation by using the identity conj(a)*conj(b) = conj(a*b). + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ResultType + pmul(const LhsScalar& x, const RhsScalar& y) const + { return numext::conj(x * y); } +}; + +// Implementation with equal type, use packet operations. +template<typename Packet, bool ConjLhs, bool ConjRhs> +struct conj_helper<Packet, Packet, ConjLhs, ConjRhs> +{ + typedef Packet ResultType; + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Packet pmadd(const Packet& x, const Packet& y, const Packet& c) const + { return Eigen::internal::pmadd(conj_if<ConjLhs>().pconj(x), conj_if<ConjRhs>().pconj(y), c); } + + + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Packet pmul(const Packet& x, const Packet& y) const + { return Eigen::internal::pmul(conj_if<ConjLhs>().pconj(x), conj_if<ConjRhs>().pconj(y)); } +}; + +template<typename Packet> +struct conj_helper<Packet, Packet, true, true> +{ + typedef Packet ResultType; + + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Packet pmadd(const Packet& x, const Packet& y, const Packet& c) const + { return Eigen::internal::pmadd(pconj(x), pconj(y), c); } + // We save a conjuation by using the identity conj(a)*conj(b) = conj(a*b). + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Packet pmul(const Packet& x, const Packet& y) const + { return pconj(Eigen::internal::pmul(x, y)); } +}; + +} // namespace internal +} // namespace Eigen + +#endif // EIGEN_ARCH_CONJ_HELPER_H |