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<div class="title">SparseLU_kernel_bmod.h</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// This file is part of Eigen, a lightweight C++ template library</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// for linear algebra.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">//</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// Copyright (C) 2012 Désiré Nuentsa-Wakam <desire.nuentsa_wakam@inria.fr></span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// Copyright (C) 2012 Gael Guennebaud <gael.guennebaud@inria.fr></span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">//</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// This Source Code Form is subject to the terms of the Mozilla</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// Public License v. 2.0. If a copy of the MPL was not distributed</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#ifndef SPARSELU_KERNEL_BMOD_H</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor"></span><span class="preprocessor">#define SPARSELU_KERNEL_BMOD_H</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="keyword">namespace </span>Eigen {</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="keyword">namespace </span>internal {</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  </div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">template</span> <<span class="keywordtype">int</span> SegSizeAtCompileTime> <span class="keyword">struct </span>LU_kernel_bmod</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> {</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> BlockScalarVector, <span class="keyword">typename</span> ScalarVector, <span class="keyword">typename</span> IndexVector, <span class="keyword">typename</span> Index></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keyword">static</span> EIGEN_DONT_INLINE <span class="keywordtype">void</span> run(<span class="keyword">const</span> <span class="keywordtype">int</span> segsize, BlockScalarVector& dense, ScalarVector& tempv, ScalarVector& lusup, Index& luptr, <span class="keyword">const</span> Index lda,</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keyword">const</span> Index nrow, IndexVector& lsub, <span class="keyword">const</span> Index lptr, <span class="keyword">const</span> Index no_zeros);</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> };</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">template</span> <<span class="keywordtype">int</span> SegSizeAtCompileTime></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="keyword">template</span> <<span class="keyword">typename</span> BlockScalarVector, <span class="keyword">typename</span> ScalarVector, <span class="keyword">typename</span> IndexVector, <span class="keyword">typename</span> Index></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> EIGEN_DONT_INLINE <span class="keywordtype">void</span> LU_kernel_bmod<SegSizeAtCompileTime>::run(<span class="keyword">const</span> <span class="keywordtype">int</span> segsize, BlockScalarVector& dense, ScalarVector& tempv, ScalarVector& lusup, Index& luptr, <span class="keyword">const</span> Index lda,</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keyword">const</span> Index nrow, IndexVector& lsub, <span class="keyword">const</span> Index lptr, <span class="keyword">const</span> Index no_zeros)</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> {</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> ScalarVector::Scalar Scalar;</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="comment">// First, copy U[*,j] segment from dense(*) to tempv(*)</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="comment">// The result of triangular solve is in tempv[*]; </span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="comment">// The result of matric-vector update is in dense[*]</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  Index isub = lptr + no_zeros; </div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordtype">int</span> i;</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  Index irow;</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">for</span> (i = 0; i < ((SegSizeAtCompileTime==<a class="code" href="namespaceEigen.html#adc9da5be31bdce40c25a92c27999c0e3">Dynamic</a>)?segsize:SegSizeAtCompileTime); i++)</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  {</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  irow = lsub(isub); </div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  tempv(i) = dense(irow); </div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  ++isub; </div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  }</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="comment">// Dense triangular solve -- start effective triangle</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  luptr += lda * no_zeros + no_zeros; </div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="comment">// Form Eigen matrix and vector </span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  Map<Matrix<Scalar,SegSizeAtCompileTime,SegSizeAtCompileTime>, 0, OuterStride<> > A( &(lusup.data()[luptr]), segsize, segsize, OuterStride<>(lda) );</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  Map<Matrix<Scalar,SegSizeAtCompileTime,1> > u(tempv.data(), segsize);</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  </div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  u = A.template triangularView<UnitLower>().solve(u); </div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  </div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="comment">// Dense matrix-vector product y <-- B*x </span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  luptr += segsize;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keyword">const</span> Index PacketSize = internal::packet_traits<Scalar>::size;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  Index ldl = internal::first_multiple(nrow, PacketSize);</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  Map<Matrix<Scalar,Dynamic,SegSizeAtCompileTime>, 0, OuterStride<> > B( &(lusup.data()[luptr]), nrow, segsize, OuterStride<>(lda) );</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  Index aligned_offset = internal::first_aligned(tempv.data()+segsize, PacketSize);</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  Index aligned_with_B_offset = (PacketSize-internal::first_aligned(B.data(), PacketSize))%PacketSize;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  Map<Matrix<Scalar,Dynamic,1>, 0, OuterStride<> > l(tempv.data()+segsize+aligned_offset+aligned_with_B_offset, nrow, OuterStride<>(ldl) );</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  </div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  l.setZero();</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  internal::sparselu_gemm<Scalar>(l.rows(), l.cols(), B.cols(), B.data(), B.outerStride(), u.data(), u.outerStride(), l.data(), l.outerStride());</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  </div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="comment">// Scatter tempv[] into SPA dense[] as a temporary storage </span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  isub = lptr + no_zeros;</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keywordflow">for</span> (i = 0; i < ((SegSizeAtCompileTime==<a class="code" href="namespaceEigen.html#adc9da5be31bdce40c25a92c27999c0e3">Dynamic</a>)?segsize:SegSizeAtCompileTime); i++)</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  {</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  irow = lsub(isub++); </div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  dense(irow) = tempv(i);</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  }</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  </div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="comment">// Scatter l into SPA dense[]</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">for</span> (i = 0; i < nrow; i++)</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  {</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  irow = lsub(isub++); </div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  dense(irow) -= l(i);</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  } </div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> }</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="keyword">template</span> <> <span class="keyword">struct </span>LU_kernel_bmod<1></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> {</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> BlockScalarVector, <span class="keyword">typename</span> ScalarVector, <span class="keyword">typename</span> IndexVector, <span class="keyword">typename</span> Index></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keyword">static</span> EIGEN_DONT_INLINE <span class="keywordtype">void</span> run(<span class="keyword">const</span> <span class="keywordtype">int</span> <span class="comment">/*segsize*/</span>, BlockScalarVector& dense, ScalarVector& <span class="comment">/*tempv*/</span>, ScalarVector& lusup, Index& luptr,</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keyword">const</span> Index lda, <span class="keyword">const</span> Index nrow, IndexVector& lsub, <span class="keyword">const</span> Index lptr, <span class="keyword">const</span> Index no_zeros);</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> };</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> </div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="keyword">template</span> <<span class="keyword">typename</span> BlockScalarVector, <span class="keyword">typename</span> ScalarVector, <span class="keyword">typename</span> IndexVector, <span class="keyword">typename</span> Index></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> EIGEN_DONT_INLINE <span class="keywordtype">void</span> LU_kernel_bmod<1>::run(<span class="keyword">const</span> <span class="keywordtype">int</span> <span class="comment">/*segsize*/</span>, BlockScalarVector& dense, ScalarVector& <span class="comment">/*tempv*/</span>, ScalarVector& lusup, Index& luptr,</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keyword">const</span> Index lda, <span class="keyword">const</span> Index nrow, IndexVector& lsub, <span class="keyword">const</span> Index lptr, <span class="keyword">const</span> Index no_zeros)</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> {</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> ScalarVector::Scalar Scalar;</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  Scalar f = dense(lsub(lptr + no_zeros));</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  luptr += lda * no_zeros + no_zeros + 1;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keyword">const</span> Scalar* a(lusup.data() + luptr);</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keyword">const</span> <span class="comment">/*typename IndexVector::Scalar*/</span>Index* irow(lsub.data()+lptr + no_zeros + 1);</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  Index i = 0;</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">for</span> (; i+1 < nrow; i+=2)</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  {</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  Index i0 = *(irow++);</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  Index i1 = *(irow++);</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  Scalar a0 = *(a++);</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  Scalar a1 = *(a++);</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  Scalar d0 = dense.coeff(i0);</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  Scalar d1 = dense.coeff(i1);</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  d0 -= f*a0;</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  d1 -= f*a1;</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  dense.coeffRef(i0) = d0;</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  dense.coeffRef(i1) = d1;</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  }</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">if</span>(i<nrow)</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  dense.coeffRef(*(irow++)) -= f * *(a++);</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> }</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> </div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> } <span class="comment">// end namespace internal</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> </div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> } <span class="comment">// end namespace Eigen</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="preprocessor">#endif // SPARSELU_KERNEL_BMOD_H</span></div>
<div class="ttc" id="namespaceEigen_html_adc9da5be31bdce40c25a92c27999c0e3"><div class="ttname"><a href="namespaceEigen.html#adc9da5be31bdce40c25a92c27999c0e3">Eigen::Dynamic</a></div><div class="ttdeci">const int Dynamic</div><div class="ttdef"><b>Definition:</b> Constants.h:21</div></div>
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