[136] | 1 | // This file is part of Eigen, a lightweight C++ template library
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| 2 | // for linear algebra.
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| 3 | //
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| 4 | // Copyright (C) 2010 Gael Guennebaud <gael.guennebaud@inria.fr>
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| 5 | //
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| 6 | // This Source Code Form is subject to the terms of the Mozilla
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| 7 | // Public License v. 2.0. If a copy of the MPL was not distributed
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| 8 | // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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| 9 |
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| 10 | #ifndef EIGEN_COMPLEX_ALTIVEC_H
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| 11 | #define EIGEN_COMPLEX_ALTIVEC_H
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| 12 |
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| 13 | namespace Eigen {
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| 14 |
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| 15 | namespace internal {
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| 16 |
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| 17 | static Packet4ui p4ui_CONJ_XOR = vec_mergeh((Packet4ui)p4i_ZERO, (Packet4ui)p4f_ZERO_);//{ 0x00000000, 0x80000000, 0x00000000, 0x80000000 };
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| 18 | static Packet16uc p16uc_COMPLEX_RE = vec_sld((Packet16uc) vec_splat((Packet4ui)p16uc_FORWARD, 0), (Packet16uc) vec_splat((Packet4ui)p16uc_FORWARD, 2), 8);//{ 0,1,2,3, 0,1,2,3, 8,9,10,11, 8,9,10,11 };
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| 19 | static Packet16uc p16uc_COMPLEX_IM = vec_sld((Packet16uc) vec_splat((Packet4ui)p16uc_FORWARD, 1), (Packet16uc) vec_splat((Packet4ui)p16uc_FORWARD, 3), 8);//{ 4,5,6,7, 4,5,6,7, 12,13,14,15, 12,13,14,15 };
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| 20 | static Packet16uc p16uc_COMPLEX_REV = vec_sld(p16uc_REVERSE, p16uc_REVERSE, 8);//{ 4,5,6,7, 0,1,2,3, 12,13,14,15, 8,9,10,11 };
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| 21 | static Packet16uc p16uc_COMPLEX_REV2 = vec_sld(p16uc_FORWARD, p16uc_FORWARD, 8);//{ 8,9,10,11, 12,13,14,15, 0,1,2,3, 4,5,6,7 };
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| 22 | static Packet16uc p16uc_PSET_HI = (Packet16uc) vec_mergeh((Packet4ui) vec_splat((Packet4ui)p16uc_FORWARD, 0), (Packet4ui) vec_splat((Packet4ui)p16uc_FORWARD, 1));//{ 0,1,2,3, 4,5,6,7, 0,1,2,3, 4,5,6,7 };
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| 23 | static Packet16uc p16uc_PSET_LO = (Packet16uc) vec_mergeh((Packet4ui) vec_splat((Packet4ui)p16uc_FORWARD, 2), (Packet4ui) vec_splat((Packet4ui)p16uc_FORWARD, 3));//{ 8,9,10,11, 12,13,14,15, 8,9,10,11, 12,13,14,15 };
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| 24 |
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| 25 | //---------- float ----------
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| 26 | struct Packet2cf
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| 27 | {
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| 28 | EIGEN_STRONG_INLINE Packet2cf() {}
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| 29 | EIGEN_STRONG_INLINE explicit Packet2cf(const Packet4f& a) : v(a) {}
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| 30 | Packet4f v;
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| 31 | };
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| 32 |
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| 33 | template<> struct packet_traits<std::complex<float> > : default_packet_traits
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| 34 | {
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| 35 | typedef Packet2cf type;
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| 36 | enum {
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| 37 | Vectorizable = 1,
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| 38 | AlignedOnScalar = 1,
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| 39 | size = 2,
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| 40 |
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| 41 | HasAdd = 1,
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| 42 | HasSub = 1,
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| 43 | HasMul = 1,
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| 44 | HasDiv = 1,
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| 45 | HasNegate = 1,
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| 46 | HasAbs = 0,
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| 47 | HasAbs2 = 0,
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| 48 | HasMin = 0,
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| 49 | HasMax = 0,
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| 50 | HasSetLinear = 0
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| 51 | };
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| 52 | };
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| 53 |
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| 54 | template<> struct unpacket_traits<Packet2cf> { typedef std::complex<float> type; enum {size=2}; };
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| 55 |
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| 56 | template<> EIGEN_STRONG_INLINE Packet2cf pset1<Packet2cf>(const std::complex<float>& from)
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| 57 | {
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| 58 | Packet2cf res;
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| 59 | /* On AltiVec we cannot load 64-bit registers, so wa have to take care of alignment */
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| 60 | if((ptrdiff_t(&from) % 16) == 0)
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| 61 | res.v = pload<Packet4f>((const float *)&from);
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| 62 | else
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| 63 | res.v = ploadu<Packet4f>((const float *)&from);
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| 64 | res.v = vec_perm(res.v, res.v, p16uc_PSET_HI);
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| 65 | return res;
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| 66 | }
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| 67 |
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| 68 | template<> EIGEN_STRONG_INLINE Packet2cf padd<Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(vec_add(a.v,b.v)); }
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| 69 | template<> EIGEN_STRONG_INLINE Packet2cf psub<Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(vec_sub(a.v,b.v)); }
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| 70 | template<> EIGEN_STRONG_INLINE Packet2cf pnegate(const Packet2cf& a) { return Packet2cf(pnegate(a.v)); }
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| 71 | template<> EIGEN_STRONG_INLINE Packet2cf pconj(const Packet2cf& a) { return Packet2cf((Packet4f)vec_xor((Packet4ui)a.v, p4ui_CONJ_XOR)); }
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| 72 |
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| 73 | template<> EIGEN_STRONG_INLINE Packet2cf pmul<Packet2cf>(const Packet2cf& a, const Packet2cf& b)
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| 74 | {
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| 75 | Packet4f v1, v2;
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| 76 |
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| 77 | // Permute and multiply the real parts of a and b
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| 78 | v1 = vec_perm(a.v, a.v, p16uc_COMPLEX_RE);
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| 79 | // Get the imaginary parts of a
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| 80 | v2 = vec_perm(a.v, a.v, p16uc_COMPLEX_IM);
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| 81 | // multiply a_re * b
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| 82 | v1 = vec_madd(v1, b.v, p4f_ZERO);
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| 83 | // multiply a_im * b and get the conjugate result
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| 84 | v2 = vec_madd(v2, b.v, p4f_ZERO);
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| 85 | v2 = (Packet4f) vec_xor((Packet4ui)v2, p4ui_CONJ_XOR);
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| 86 | // permute back to a proper order
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| 87 | v2 = vec_perm(v2, v2, p16uc_COMPLEX_REV);
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| 88 |
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| 89 | return Packet2cf(vec_add(v1, v2));
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| 90 | }
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| 91 |
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| 92 | template<> EIGEN_STRONG_INLINE Packet2cf pand <Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(vec_and(a.v,b.v)); }
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| 93 | template<> EIGEN_STRONG_INLINE Packet2cf por <Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(vec_or(a.v,b.v)); }
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| 94 | template<> EIGEN_STRONG_INLINE Packet2cf pxor <Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(vec_xor(a.v,b.v)); }
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| 95 | template<> EIGEN_STRONG_INLINE Packet2cf pandnot<Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(vec_and(a.v, vec_nor(b.v,b.v))); }
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| 96 |
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| 97 | 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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| 98 | 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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| 99 |
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| 100 | template<> EIGEN_STRONG_INLINE Packet2cf ploaddup<Packet2cf>(const std::complex<float>* from)
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| 101 | {
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| 102 | return pset1<Packet2cf>(*from);
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| 103 | }
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| 104 |
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| 105 | 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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| 106 | 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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| 107 |
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| 108 | template<> EIGEN_STRONG_INLINE void prefetch<std::complex<float> >(const std::complex<float> * addr) { vec_dstt((float *)addr, DST_CTRL(2,2,32), DST_CHAN); }
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| 109 |
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| 110 | template<> EIGEN_STRONG_INLINE std::complex<float> pfirst<Packet2cf>(const Packet2cf& a)
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| 111 | {
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| 112 | std::complex<float> EIGEN_ALIGN16 res[2];
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| 113 | pstore((float *)&res, a.v);
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| 114 |
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| 115 | return res[0];
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| 116 | }
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| 117 |
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| 118 | template<> EIGEN_STRONG_INLINE Packet2cf preverse(const Packet2cf& a)
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| 119 | {
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| 120 | Packet4f rev_a;
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| 121 | rev_a = vec_perm(a.v, a.v, p16uc_COMPLEX_REV2);
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| 122 | return Packet2cf(rev_a);
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| 123 | }
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| 124 |
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| 125 | template<> EIGEN_STRONG_INLINE std::complex<float> predux<Packet2cf>(const Packet2cf& a)
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| 126 | {
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| 127 | Packet4f b;
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| 128 | b = (Packet4f) vec_sld(a.v, a.v, 8);
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| 129 | b = padd(a.v, b);
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| 130 | return pfirst(Packet2cf(b));
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| 131 | }
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| 132 |
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| 133 | template<> EIGEN_STRONG_INLINE Packet2cf preduxp<Packet2cf>(const Packet2cf* vecs)
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| 134 | {
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| 135 | Packet4f b1, b2;
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| 136 |
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| 137 | b1 = (Packet4f) vec_sld(vecs[0].v, vecs[1].v, 8);
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| 138 | b2 = (Packet4f) vec_sld(vecs[1].v, vecs[0].v, 8);
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| 139 | b2 = (Packet4f) vec_sld(b2, b2, 8);
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| 140 | b2 = padd(b1, b2);
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| 141 |
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| 142 | return Packet2cf(b2);
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| 143 | }
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| 144 |
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| 145 | template<> EIGEN_STRONG_INLINE std::complex<float> predux_mul<Packet2cf>(const Packet2cf& a)
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| 146 | {
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| 147 | Packet4f b;
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| 148 | Packet2cf prod;
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| 149 | b = (Packet4f) vec_sld(a.v, a.v, 8);
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| 150 | prod = pmul(a, Packet2cf(b));
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| 151 |
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| 152 | return pfirst(prod);
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| 153 | }
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| 154 |
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| 155 | template<int Offset>
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| 156 | struct palign_impl<Offset,Packet2cf>
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| 157 | {
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| 158 | static EIGEN_STRONG_INLINE void run(Packet2cf& first, const Packet2cf& second)
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| 159 | {
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| 160 | if (Offset==1)
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| 161 | {
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| 162 | first.v = vec_sld(first.v, second.v, 8);
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| 163 | }
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| 164 | }
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| 165 | };
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| 166 |
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| 167 | template<> struct conj_helper<Packet2cf, Packet2cf, false,true>
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| 168 | {
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| 169 | EIGEN_STRONG_INLINE Packet2cf pmadd(const Packet2cf& x, const Packet2cf& y, const Packet2cf& c) const
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| 170 | { return padd(pmul(x,y),c); }
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| 171 |
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| 172 | EIGEN_STRONG_INLINE Packet2cf pmul(const Packet2cf& a, const Packet2cf& b) const
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| 173 | {
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| 174 | return internal::pmul(a, pconj(b));
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| 175 | }
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| 176 | };
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| 177 |
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| 178 | template<> struct conj_helper<Packet2cf, Packet2cf, true,false>
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| 179 | {
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| 180 | EIGEN_STRONG_INLINE Packet2cf pmadd(const Packet2cf& x, const Packet2cf& y, const Packet2cf& c) const
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| 181 | { return padd(pmul(x,y),c); }
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| 182 |
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| 183 | EIGEN_STRONG_INLINE Packet2cf pmul(const Packet2cf& a, const Packet2cf& b) const
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| 184 | {
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| 185 | return internal::pmul(pconj(a), b);
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| 186 | }
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| 187 | };
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| 188 |
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| 189 | template<> struct conj_helper<Packet2cf, Packet2cf, true,true>
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| 190 | {
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| 191 | EIGEN_STRONG_INLINE Packet2cf pmadd(const Packet2cf& x, const Packet2cf& y, const Packet2cf& c) const
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| 192 | { return padd(pmul(x,y),c); }
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| 193 |
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| 194 | EIGEN_STRONG_INLINE Packet2cf pmul(const Packet2cf& a, const Packet2cf& b) const
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| 195 | {
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| 196 | return pconj(internal::pmul(a, b));
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| 197 | }
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| 198 | };
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| 199 |
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| 200 | template<> EIGEN_STRONG_INLINE Packet2cf pdiv<Packet2cf>(const Packet2cf& a, const Packet2cf& b)
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| 201 | {
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| 202 | // TODO optimize it for AltiVec
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| 203 | Packet2cf res = conj_helper<Packet2cf,Packet2cf,false,true>().pmul(a,b);
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| 204 | Packet4f s = vec_madd(b.v, b.v, p4f_ZERO);
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| 205 | return Packet2cf(pdiv(res.v, vec_add(s,vec_perm(s, s, p16uc_COMPLEX_REV))));
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| 206 | }
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| 207 |
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| 208 | template<> EIGEN_STRONG_INLINE Packet2cf pcplxflip<Packet2cf>(const Packet2cf& x)
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| 209 | {
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| 210 | return Packet2cf(vec_perm(x.v, x.v, p16uc_COMPLEX_REV));
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| 211 | }
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| 212 |
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| 213 | } // end namespace internal
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| 214 |
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| 215 | } // end namespace Eigen
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| 216 |
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| 217 | #endif // EIGEN_COMPLEX_ALTIVEC_H
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