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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