254 lines
8.2 KiB
C++
254 lines
8.2 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) 2010 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_COMPLEX_NEON_H
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#define EIGEN_COMPLEX_NEON_H
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namespace Eigen {
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namespace internal {
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static uint32x4_t p4ui_CONJ_XOR = EIGEN_INIT_NEON_PACKET4(0x00000000, 0x80000000, 0x00000000, 0x80000000);
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static uint32x2_t p2ui_CONJ_XOR = EIGEN_INIT_NEON_PACKET2(0x00000000, 0x80000000);
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//---------- float ----------
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struct Packet2cf
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{
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EIGEN_STRONG_INLINE Packet2cf() {}
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EIGEN_STRONG_INLINE explicit Packet2cf(const Packet4f& a) : v(a) {}
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Packet4f v;
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};
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template<> struct packet_traits<std::complex<float> > : default_packet_traits
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{
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typedef Packet2cf type;
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enum {
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Vectorizable = 1,
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AlignedOnScalar = 1,
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size = 2,
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HasAdd = 1,
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HasSub = 1,
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HasMul = 1,
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HasDiv = 1,
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HasNegate = 1,
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HasAbs = 0,
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HasAbs2 = 0,
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HasMin = 0,
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HasMax = 0,
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HasSetLinear = 0
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};
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};
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template<> struct unpacket_traits<Packet2cf> { typedef std::complex<float> type; enum {size=2}; };
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template<> EIGEN_STRONG_INLINE Packet2cf pset1<Packet2cf>(const std::complex<float>& from)
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{
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float32x2_t r64;
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r64 = vld1_f32((float *)&from);
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return Packet2cf(vcombine_f32(r64, r64));
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}
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template<> EIGEN_STRONG_INLINE Packet2cf padd<Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(padd<Packet4f>(a.v,b.v)); }
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template<> EIGEN_STRONG_INLINE Packet2cf psub<Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(psub<Packet4f>(a.v,b.v)); }
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template<> EIGEN_STRONG_INLINE Packet2cf pnegate(const Packet2cf& a) { return Packet2cf(pnegate<Packet4f>(a.v)); }
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template<> EIGEN_STRONG_INLINE Packet2cf pconj(const Packet2cf& a)
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{
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Packet4ui b = vreinterpretq_u32_f32(a.v);
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return Packet2cf(vreinterpretq_f32_u32(veorq_u32(b, p4ui_CONJ_XOR)));
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}
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template<> EIGEN_STRONG_INLINE Packet2cf pmul<Packet2cf>(const Packet2cf& a, const Packet2cf& b)
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{
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Packet4f v1, v2;
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// Get the real values of a | a1_re | a1_re | a2_re | a2_re |
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v1 = vcombine_f32(vdup_lane_f32(vget_low_f32(a.v), 0), vdup_lane_f32(vget_high_f32(a.v), 0));
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// Get the real values of a | a1_im | a1_im | a2_im | a2_im |
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v2 = vcombine_f32(vdup_lane_f32(vget_low_f32(a.v), 1), vdup_lane_f32(vget_high_f32(a.v), 1));
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// Multiply the real a with b
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v1 = vmulq_f32(v1, b.v);
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// Multiply the imag a with b
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v2 = vmulq_f32(v2, b.v);
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// Conjugate v2
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v2 = vreinterpretq_f32_u32(veorq_u32(vreinterpretq_u32_f32(v2), p4ui_CONJ_XOR));
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// Swap real/imag elements in v2.
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v2 = vrev64q_f32(v2);
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// Add and return the result
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return Packet2cf(vaddq_f32(v1, v2));
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}
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template<> EIGEN_STRONG_INLINE Packet2cf pand <Packet2cf>(const Packet2cf& a, const Packet2cf& b)
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{
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return Packet2cf(vreinterpretq_f32_u32(vorrq_u32(vreinterpretq_u32_f32(a.v),vreinterpretq_u32_f32(b.v))));
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}
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template<> EIGEN_STRONG_INLINE Packet2cf por <Packet2cf>(const Packet2cf& a, const Packet2cf& b)
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{
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return Packet2cf(vreinterpretq_f32_u32(vorrq_u32(vreinterpretq_u32_f32(a.v),vreinterpretq_u32_f32(b.v))));
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}
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template<> EIGEN_STRONG_INLINE Packet2cf pxor <Packet2cf>(const Packet2cf& a, const Packet2cf& b)
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{
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return Packet2cf(vreinterpretq_f32_u32(veorq_u32(vreinterpretq_u32_f32(a.v),vreinterpretq_u32_f32(b.v))));
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}
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template<> EIGEN_STRONG_INLINE Packet2cf pandnot<Packet2cf>(const Packet2cf& a, const Packet2cf& b)
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{
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return Packet2cf(vreinterpretq_f32_u32(vbicq_u32(vreinterpretq_u32_f32(a.v),vreinterpretq_u32_f32(b.v))));
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}
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template<> EIGEN_STRONG_INLINE Packet2cf pload<Packet2cf>(const std::complex<float>* from) { EIGEN_DEBUG_ALIGNED_LOAD return Packet2cf(pload<Packet4f>((const float*)from)); }
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template<> EIGEN_STRONG_INLINE Packet2cf ploadu<Packet2cf>(const std::complex<float>* from) { EIGEN_DEBUG_UNALIGNED_LOAD return Packet2cf(ploadu<Packet4f>((const float*)from)); }
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template<> EIGEN_STRONG_INLINE Packet2cf ploaddup<Packet2cf>(const std::complex<float>* from) { return pset1<Packet2cf>(*from); }
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template<> EIGEN_STRONG_INLINE void pstore <std::complex<float> >(std::complex<float> * to, const Packet2cf& from) { EIGEN_DEBUG_ALIGNED_STORE pstore((float*)to, from.v); }
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template<> EIGEN_STRONG_INLINE void pstoreu<std::complex<float> >(std::complex<float> * to, const Packet2cf& from) { EIGEN_DEBUG_UNALIGNED_STORE pstoreu((float*)to, from.v); }
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template<> EIGEN_STRONG_INLINE void prefetch<std::complex<float> >(const std::complex<float> * addr) { EIGEN_ARM_PREFETCH((float *)addr); }
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template<> EIGEN_STRONG_INLINE std::complex<float> pfirst<Packet2cf>(const Packet2cf& a)
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{
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std::complex<float> EIGEN_ALIGN16 x[2];
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vst1q_f32((float *)x, a.v);
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return x[0];
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}
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template<> EIGEN_STRONG_INLINE Packet2cf preverse(const Packet2cf& a)
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{
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float32x2_t a_lo, a_hi;
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Packet4f a_r128;
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a_lo = vget_low_f32(a.v);
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a_hi = vget_high_f32(a.v);
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a_r128 = vcombine_f32(a_hi, a_lo);
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return Packet2cf(a_r128);
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}
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template<> EIGEN_STRONG_INLINE Packet2cf pcplxflip<Packet2cf>(const Packet2cf& a)
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{
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return Packet2cf(vrev64q_f32(a.v));
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}
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template<> EIGEN_STRONG_INLINE std::complex<float> predux<Packet2cf>(const Packet2cf& a)
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{
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float32x2_t a1, a2;
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std::complex<float> s;
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a1 = vget_low_f32(a.v);
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a2 = vget_high_f32(a.v);
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a2 = vadd_f32(a1, a2);
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vst1_f32((float *)&s, a2);
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return s;
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}
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template<> EIGEN_STRONG_INLINE Packet2cf preduxp<Packet2cf>(const Packet2cf* vecs)
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{
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Packet4f sum1, sum2, sum;
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// Add the first two 64-bit float32x2_t of vecs[0]
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sum1 = vcombine_f32(vget_low_f32(vecs[0].v), vget_low_f32(vecs[1].v));
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sum2 = vcombine_f32(vget_high_f32(vecs[0].v), vget_high_f32(vecs[1].v));
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sum = vaddq_f32(sum1, sum2);
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return Packet2cf(sum);
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}
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template<> EIGEN_STRONG_INLINE std::complex<float> predux_mul<Packet2cf>(const Packet2cf& a)
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{
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float32x2_t a1, a2, v1, v2, prod;
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std::complex<float> s;
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a1 = vget_low_f32(a.v);
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a2 = vget_high_f32(a.v);
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// Get the real values of a | a1_re | a1_re | a2_re | a2_re |
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v1 = vdup_lane_f32(a1, 0);
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// Get the real values of a | a1_im | a1_im | a2_im | a2_im |
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v2 = vdup_lane_f32(a1, 1);
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// Multiply the real a with b
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v1 = vmul_f32(v1, a2);
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// Multiply the imag a with b
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v2 = vmul_f32(v2, a2);
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// Conjugate v2
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v2 = vreinterpret_f32_u32(veor_u32(vreinterpret_u32_f32(v2), p2ui_CONJ_XOR));
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// Swap real/imag elements in v2.
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v2 = vrev64_f32(v2);
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// Add v1, v2
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prod = vadd_f32(v1, v2);
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vst1_f32((float *)&s, prod);
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return s;
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}
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template<int Offset>
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struct palign_impl<Offset,Packet2cf>
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{
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EIGEN_STRONG_INLINE static void run(Packet2cf& first, const Packet2cf& second)
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{
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if (Offset==1)
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{
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first.v = vextq_f32(first.v, second.v, 2);
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}
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}
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};
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template<> struct conj_helper<Packet2cf, Packet2cf, false,true>
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{
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EIGEN_STRONG_INLINE Packet2cf pmadd(const Packet2cf& x, const Packet2cf& y, const Packet2cf& c) const
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{ return padd(pmul(x,y),c); }
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EIGEN_STRONG_INLINE Packet2cf pmul(const Packet2cf& a, const Packet2cf& b) const
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{
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return internal::pmul(a, pconj(b));
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}
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};
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template<> struct conj_helper<Packet2cf, Packet2cf, true,false>
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{
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EIGEN_STRONG_INLINE Packet2cf pmadd(const Packet2cf& x, const Packet2cf& y, const Packet2cf& c) const
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{ return padd(pmul(x,y),c); }
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EIGEN_STRONG_INLINE Packet2cf pmul(const Packet2cf& a, const Packet2cf& b) const
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{
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return internal::pmul(pconj(a), b);
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}
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};
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template<> struct conj_helper<Packet2cf, Packet2cf, true,true>
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{
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EIGEN_STRONG_INLINE Packet2cf pmadd(const Packet2cf& x, const Packet2cf& y, const Packet2cf& c) const
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{ return padd(pmul(x,y),c); }
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EIGEN_STRONG_INLINE Packet2cf pmul(const Packet2cf& a, const Packet2cf& b) const
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{
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return pconj(internal::pmul(a, b));
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}
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};
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template<> EIGEN_STRONG_INLINE Packet2cf pdiv<Packet2cf>(const Packet2cf& a, const Packet2cf& b)
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{
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// TODO optimize it for AltiVec
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Packet2cf res = conj_helper<Packet2cf,Packet2cf,false,true>().pmul(a,b);
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Packet4f s, rev_s;
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// this computes the norm
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s = vmulq_f32(b.v, b.v);
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rev_s = vrev64q_f32(s);
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return Packet2cf(pdiv(res.v, vaddq_f32(s,rev_s)));
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}
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} // end namespace internal
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} // end namespace Eigen
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#endif // EIGEN_COMPLEX_NEON_H
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