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125cc9a5df
Closes #1905 Measured speedup for sqrt of `complex<float>` on Skylake: SSE: ``` name old time/op new time/op delta BM_eigen_sqrt_ctype/1 49.4ns ± 0% 54.3ns ± 0% +10.01% BM_eigen_sqrt_ctype/8 332ns ± 0% 50ns ± 1% -84.97% BM_eigen_sqrt_ctype/64 2.81µs ± 1% 0.38µs ± 0% -86.49% BM_eigen_sqrt_ctype/512 23.8µs ± 0% 3.0µs ± 0% -87.32% BM_eigen_sqrt_ctype/4k 202µs ± 0% 24µs ± 2% -88.03% BM_eigen_sqrt_ctype/32k 1.63ms ± 0% 0.19ms ± 0% -88.18% BM_eigen_sqrt_ctype/256k 13.0ms ± 0% 1.5ms ± 1% -88.20% BM_eigen_sqrt_ctype/1M 52.1ms ± 0% 6.2ms ± 0% -88.18% ``` AVX2: ``` name old cpu/op new cpu/op delta BM_eigen_sqrt_ctype/1 53.6ns ± 0% 55.6ns ± 0% +3.71% BM_eigen_sqrt_ctype/8 334ns ± 0% 27ns ± 0% -91.86% BM_eigen_sqrt_ctype/64 2.79µs ± 0% 0.22µs ± 2% -92.28% BM_eigen_sqrt_ctype/512 23.8µs ± 1% 1.7µs ± 1% -92.81% BM_eigen_sqrt_ctype/4k 201µs ± 0% 14µs ± 1% -93.24% BM_eigen_sqrt_ctype/32k 1.62ms ± 0% 0.11ms ± 1% -93.29% BM_eigen_sqrt_ctype/256k 13.0ms ± 0% 0.9ms ± 1% -93.31% BM_eigen_sqrt_ctype/1M 52.0ms ± 0% 3.5ms ± 1% -93.31% ``` AVX512: ``` name old cpu/op new cpu/op delta BM_eigen_sqrt_ctype/1 53.7ns ± 0% 56.2ns ± 1% +4.75% BM_eigen_sqrt_ctype/8 334ns ± 0% 18ns ± 2% -94.63% BM_eigen_sqrt_ctype/64 2.79µs ± 0% 0.12µs ± 1% -95.54% BM_eigen_sqrt_ctype/512 23.9µs ± 1% 1.0µs ± 1% -95.89% BM_eigen_sqrt_ctype/4k 202µs ± 0% 8µs ± 1% -96.13% BM_eigen_sqrt_ctype/32k 1.63ms ± 0% 0.06ms ± 1% -96.15% BM_eigen_sqrt_ctype/256k 13.0ms ± 0% 0.5ms ± 4% -96.11% BM_eigen_sqrt_ctype/1M 52.1ms ± 0% 2.0ms ± 1% -96.13% ```
98 lines
3.0 KiB
C++
98 lines
3.0 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra.
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//
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// Copyright (C) 2019 Gael Guennebaud <gael.guennebaud@inria.fr>
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//
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// This Source Code Form is subject to the terms of the Mozilla
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// Public License v. 2.0. If a copy of the MPL was not distributed
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// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef EIGEN_ARCH_GENERIC_PACKET_MATH_FUNCTIONS_FWD_H
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#define EIGEN_ARCH_GENERIC_PACKET_MATH_FUNCTIONS_FWD_H
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namespace Eigen {
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namespace internal {
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// Forward declarations of the generic math functions
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// implemented in GenericPacketMathFunctions.h
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// This is needed to workaround a circular dependency.
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template<typename Packet> EIGEN_STRONG_INLINE Packet
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pfrexp_float(const Packet& a, Packet& exponent);
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template<typename Packet> EIGEN_STRONG_INLINE Packet
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pfrexp_double(const Packet& a, Packet& exponent);
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template<typename Packet> EIGEN_STRONG_INLINE Packet
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pldexp_float(Packet a, Packet exponent);
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/** \internal \returns log(x) for single precision float */
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template <typename Packet>
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EIGEN_DEFINE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
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EIGEN_UNUSED
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Packet plog_float(const Packet _x);
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/** \internal \returns log2(x) for single precision float */
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template <typename Packet>
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EIGEN_DEFINE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
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EIGEN_UNUSED
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Packet plog2_float(const Packet _x);
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/** \internal \returns log(x) for single precision float */
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template <typename Packet>
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EIGEN_DEFINE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
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EIGEN_UNUSED
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Packet plog_double(const Packet _x);
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/** \internal \returns log2(x) for single precision float */
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template <typename Packet>
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EIGEN_DEFINE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
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EIGEN_UNUSED
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Packet plog2_double(const Packet _x);
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/** \internal \returns log(1 + x) */
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template<typename Packet>
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Packet generic_plog1p(const Packet& x);
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/** \internal \returns exp(x)-1 */
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template<typename Packet>
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Packet generic_expm1(const Packet& x);
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/** \internal \returns exp(x) for single precision float */
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template <typename Packet>
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EIGEN_DEFINE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
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EIGEN_UNUSED
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Packet pexp_float(const Packet _x);
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/** \internal \returns exp(x) for double precision real numbers */
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template <typename Packet>
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EIGEN_DEFINE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
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EIGEN_UNUSED
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Packet pexp_double(const Packet _x);
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/** \internal \returns sin(x) for single precision float */
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template<typename Packet>
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EIGEN_DEFINE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
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EIGEN_UNUSED
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Packet psin_float(const Packet& x);
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/** \internal \returns cos(x) for single precision float */
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template<typename Packet>
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EIGEN_DEFINE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
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EIGEN_UNUSED
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Packet pcos_float(const Packet& x);
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/** \internal \returns sqrt(x) for complex types */
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template<typename Packet>
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EIGEN_DEFINE_FUNCTION_ALLOWING_MULTIPLE_DEFINITIONS
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EIGEN_UNUSED
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Packet psqrt_complex(const Packet& a);
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template <typename Packet, int N> struct ppolevl;
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} // end namespace internal
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} // end namespace Eigen
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#endif // EIGEN_ARCH_GENERIC_PACKET_MATH_FUNCTIONS_FWD_H
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