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<div class="title">QuEST_gpu.cu</div> </div>
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<div class="contents">
<a href="QuEST__gpu_8cu.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Distributed under MIT licence. See https://github.com/QuEST-Kit/QuEST/blob/master/LICENCE.txt for details</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>  </div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor"># include "<a class="code" href="QuEST_8h.html">QuEST.h</a>"</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor"># include "<a class="code" href="QuEST__precision_8h.html">QuEST_precision.h</a>"</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor"># include "<a class="code" href="QuEST__internal_8h.html">QuEST_internal.h</a>"</span> <span class="comment">// purely to resolve getQuESTDefaultSeedKey</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor"># include "<a class="code" href="mt19937ar_8h.html">mt19937ar.h</a>"</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  </div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor"># include <stdlib.h></span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor"># include <stdio.h></span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor"># include <math.h></span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  </div>
<div class="line"><a name="l00019"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#aa57d77a0903e334e963c66ddc5ed3f53"> 19</a></span> <span class="preprocessor"># define REDUCE_SHARED_SIZE 512</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#ad72dbcf6d0153db1b8d8a58001feed83"> 20</a></span> <span class="preprocessor"># define DEBUG 0</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  </div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  </div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  </div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * struct types for concisely passing unitaries to kernels</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  </div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="comment">// hide these from doxygen</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"></span> </div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keyword">typedef</span> <span class="keyword">struct </span>ArgMatrix2 {</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <a class="code" href="structComplex.html">Complex</a> r0c0, r0c1;</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <a class="code" href="structComplex.html">Complex</a> r1c0, r1c1;</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  } ArgMatrix2;</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  </div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keyword">typedef</span> <span class="keyword">struct </span>ArgMatrix4</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>  <a class="code" href="structComplex.html">Complex</a> r0c0, r0c1, r0c2, r0c3;</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <a class="code" href="structComplex.html">Complex</a> r1c0, r1c1, r1c2, r1c3;</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <a class="code" href="structComplex.html">Complex</a> r2c0, r2c1, r2c2, r2c3;</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <a class="code" href="structComplex.html">Complex</a> r3c0, r3c1, r3c2, r3c3;</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  } ArgMatrix4;</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  </div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> ArgMatrix2 argifyMatrix2(<a class="code" href="structComplexMatrix2.html">ComplexMatrix2</a> m) { </div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  ArgMatrix2 a;</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  a.r0c0.real=m.<a class="code" href="structComplexMatrix2.html#a3ea98d545b67a190ee6abe936c72076f">real</a>[0][0]; a.r0c0.imag=m.<a class="code" href="structComplexMatrix2.html#a3a2b60a9e00ccef054a6de3b9307c1be">imag</a>[0][0];</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  a.r0c1.real=m.<a class="code" href="structComplexMatrix2.html#a3ea98d545b67a190ee6abe936c72076f">real</a>[0][1]; a.r0c1.imag=m.<a class="code" href="structComplexMatrix2.html#a3a2b60a9e00ccef054a6de3b9307c1be">imag</a>[0][1];</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  a.r1c0.real=m.<a class="code" href="structComplexMatrix2.html#a3ea98d545b67a190ee6abe936c72076f">real</a>[1][0]; a.r1c0.imag=m.<a class="code" href="structComplexMatrix2.html#a3a2b60a9e00ccef054a6de3b9307c1be">imag</a>[1][0];</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  a.r1c1.real=m.<a class="code" href="structComplexMatrix2.html#a3ea98d545b67a190ee6abe936c72076f">real</a>[1][1]; a.r1c1.imag=m.<a class="code" href="structComplexMatrix2.html#a3a2b60a9e00ccef054a6de3b9307c1be">imag</a>[1][1];</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">return</span> a;</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>  </div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> ArgMatrix4 argifyMatrix4(<a class="code" href="structComplexMatrix4.html">ComplexMatrix4</a> m) { </div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  ArgMatrix4 a;</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  a.r0c0.real=m.<a class="code" href="structComplexMatrix4.html#aeadc9893e1b16cdd585dac523e73926c">real</a>[0][0]; a.r0c0.imag=m.<a class="code" href="structComplexMatrix4.html#a1f6bb840b5a9e6252980cab7a14f1a35">imag</a>[0][0];</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  a.r0c1.real=m.<a class="code" href="structComplexMatrix4.html#aeadc9893e1b16cdd585dac523e73926c">real</a>[0][1]; a.r0c1.imag=m.<a class="code" href="structComplexMatrix4.html#a1f6bb840b5a9e6252980cab7a14f1a35">imag</a>[0][1];</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  a.r0c2.real=m.<a class="code" href="structComplexMatrix4.html#aeadc9893e1b16cdd585dac523e73926c">real</a>[0][2]; a.r0c2.imag=m.<a class="code" href="structComplexMatrix4.html#a1f6bb840b5a9e6252980cab7a14f1a35">imag</a>[0][2];</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  a.r0c3.real=m.<a class="code" href="structComplexMatrix4.html#aeadc9893e1b16cdd585dac523e73926c">real</a>[0][3]; a.r0c3.imag=m.<a class="code" href="structComplexMatrix4.html#a1f6bb840b5a9e6252980cab7a14f1a35">imag</a>[0][3];</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  a.r1c0.real=m.<a class="code" href="structComplexMatrix4.html#aeadc9893e1b16cdd585dac523e73926c">real</a>[1][0]; a.r1c0.imag=m.<a class="code" href="structComplexMatrix4.html#a1f6bb840b5a9e6252980cab7a14f1a35">imag</a>[1][0];</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  a.r1c1.real=m.<a class="code" href="structComplexMatrix4.html#aeadc9893e1b16cdd585dac523e73926c">real</a>[1][1]; a.r1c1.imag=m.<a class="code" href="structComplexMatrix4.html#a1f6bb840b5a9e6252980cab7a14f1a35">imag</a>[1][1];</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  a.r1c2.real=m.<a class="code" href="structComplexMatrix4.html#aeadc9893e1b16cdd585dac523e73926c">real</a>[1][2]; a.r1c2.imag=m.<a class="code" href="structComplexMatrix4.html#a1f6bb840b5a9e6252980cab7a14f1a35">imag</a>[1][2];</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  a.r1c3.real=m.<a class="code" href="structComplexMatrix4.html#aeadc9893e1b16cdd585dac523e73926c">real</a>[1][3]; a.r1c3.imag=m.<a class="code" href="structComplexMatrix4.html#a1f6bb840b5a9e6252980cab7a14f1a35">imag</a>[1][3];</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  a.r2c0.real=m.<a class="code" href="structComplexMatrix4.html#aeadc9893e1b16cdd585dac523e73926c">real</a>[2][0]; a.r2c0.imag=m.<a class="code" href="structComplexMatrix4.html#a1f6bb840b5a9e6252980cab7a14f1a35">imag</a>[2][0];</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  a.r2c1.real=m.<a class="code" href="structComplexMatrix4.html#aeadc9893e1b16cdd585dac523e73926c">real</a>[2][1]; a.r2c1.imag=m.<a class="code" href="structComplexMatrix4.html#a1f6bb840b5a9e6252980cab7a14f1a35">imag</a>[2][1];</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  a.r2c2.real=m.<a class="code" href="structComplexMatrix4.html#aeadc9893e1b16cdd585dac523e73926c">real</a>[2][2]; a.r2c2.imag=m.<a class="code" href="structComplexMatrix4.html#a1f6bb840b5a9e6252980cab7a14f1a35">imag</a>[2][2];</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  a.r2c3.real=m.<a class="code" href="structComplexMatrix4.html#aeadc9893e1b16cdd585dac523e73926c">real</a>[2][3]; a.r2c3.imag=m.<a class="code" href="structComplexMatrix4.html#a1f6bb840b5a9e6252980cab7a14f1a35">imag</a>[2][3];</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  a.r3c0.real=m.<a class="code" href="structComplexMatrix4.html#aeadc9893e1b16cdd585dac523e73926c">real</a>[3][0]; a.r3c0.imag=m.<a class="code" href="structComplexMatrix4.html#a1f6bb840b5a9e6252980cab7a14f1a35">imag</a>[3][0];</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  a.r3c1.real=m.<a class="code" href="structComplexMatrix4.html#aeadc9893e1b16cdd585dac523e73926c">real</a>[3][1]; a.r3c1.imag=m.<a class="code" href="structComplexMatrix4.html#a1f6bb840b5a9e6252980cab7a14f1a35">imag</a>[3][1];</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  a.r3c2.real=m.<a class="code" href="structComplexMatrix4.html#aeadc9893e1b16cdd585dac523e73926c">real</a>[3][2]; a.r3c2.imag=m.<a class="code" href="structComplexMatrix4.html#a1f6bb840b5a9e6252980cab7a14f1a35">imag</a>[3][2];</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  a.r3c3.real=m.<a class="code" href="structComplexMatrix4.html#aeadc9893e1b16cdd585dac523e73926c">real</a>[3][3]; a.r3c3.imag=m.<a class="code" href="structComplexMatrix4.html#a1f6bb840b5a9e6252980cab7a14f1a35">imag</a>[3][3];</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">return</span> a;</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>  </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>  </div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  </div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"> * in-kernel bit twiddling functions</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  </div>
<div class="line"><a name="l00082"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#aec1852e1a8e70d3690919ce8ab551ba0"> 82</a></span> __forceinline__ __device__ <span class="keywordtype">int</span> <a class="code" href="QuEST__gpu_8cu.html#aec1852e1a8e70d3690919ce8ab551ba0">extractBit</a> (<span class="keyword">const</span> <span class="keywordtype">int</span> locationOfBitFromRight, <span class="keyword">const</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> theEncodedNumber) {</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordflow">return</span> (theEncodedNumber & ( 1LL << locationOfBitFromRight )) >> locationOfBitFromRight;</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> }</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  </div>
<div class="line"><a name="l00086"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a1775b7abce55ccfd036bd5f55707877c"> 86</a></span> __forceinline__ __device__ <span class="keywordtype">int</span> <a class="code" href="QuEST__gpu_8cu.html#a1775b7abce55ccfd036bd5f55707877c">getBitMaskParity</a>(<span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> mask) {</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordtype">int</span> parity = 0;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">while</span> (mask) {</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  parity = !parity;</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  mask = mask & (mask-1);</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="keywordflow">return</span> parity;</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>  </div>
<div class="line"><a name="l00095"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#ae1b7788cf504ec3d79de3855f97929c7"> 95</a></span> __forceinline__ __device__ <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> <a class="code" href="QuEST__gpu_8cu.html#ae1b7788cf504ec3d79de3855f97929c7">flipBit</a>(<span class="keyword">const</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> number, <span class="keyword">const</span> <span class="keywordtype">int</span> bitInd) {</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordflow">return</span> (number ^ (1LL << bitInd));</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"><a class="line" href="QuEST__gpu_8cu.html#a5c6f1b2c71f43e57de4a1f818ddfbfd0"> 99</a></span> __forceinline__ __device__ <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> <a class="code" href="QuEST__gpu_8cu.html#a5c6f1b2c71f43e57de4a1f818ddfbfd0">insertZeroBit</a>(<span class="keyword">const</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> number, <span class="keyword">const</span> <span class="keywordtype">int</span> index) {</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> left, right;</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  left = (number >> index) << index;</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  right = number - left;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordflow">return</span> (left << 1) ^ right;</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> }</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  </div>
<div class="line"><a name="l00106"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a4760109974e9b52c60e9d60ccded3138"> 106</a></span> __forceinline__ __device__ <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> <a class="code" href="QuEST__gpu_8cu.html#a4760109974e9b52c60e9d60ccded3138">insertTwoZeroBits</a>(<span class="keyword">const</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> number, <span class="keyword">const</span> <span class="keywordtype">int</span> bit1, <span class="keyword">const</span> <span class="keywordtype">int</span> bit2) {</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordtype">int</span> small = (bit1 < bit2)? bit1 : bit2;</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordtype">int</span> big = (bit1 < bit2)? bit2 : bit1;</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordflow">return</span> <a class="code" href="QuEST__gpu_8cu.html#a5c6f1b2c71f43e57de4a1f818ddfbfd0">insertZeroBit</a>(<a class="code" href="QuEST__gpu_8cu.html#a5c6f1b2c71f43e57de4a1f818ddfbfd0">insertZeroBit</a>(number, small), big);</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> }</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  </div>
<div class="line"><a name="l00112"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a9bac39238e100b0f845dc6e4deafc1c9"> 112</a></span> __forceinline__ __device__ <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> <a class="code" href="QuEST__gpu_8cu.html#a9bac39238e100b0f845dc6e4deafc1c9">insertZeroBits</a>(<span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> number, <span class="keywordtype">int</span>* inds, <span class="keyword">const</span> <span class="keywordtype">int</span> numInds) {</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="comment">/* inserted bit inds must strictly increase, so that their final indices are correct.</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> * in-lieu of sorting (avoided since no C++ variable-size arrays, and since we're already </span></div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment"> * memory bottle-necked so overhead eats this slowdown), we find the next-smallest index each </span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment"> * at each insert. recall every element of inds (a positive or zero number) is unique.</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment"> * This function won't appear in the CPU code, which can use C99 variable-size arrays and </span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment"> * ought to make a sorted array before threading</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordtype">int</span> curMin = inds[0];</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordtype">int</span> prevMin = -1;</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> n=0; n < numInds; n++) {</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  </div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="comment">// find next min</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> t=0; t < numInds; t++)</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keywordflow">if</span> (inds[t]>prevMin && inds[t]<curMin)</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  curMin = inds[t];</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>  number = <a class="code" href="QuEST__gpu_8cu.html#a5c6f1b2c71f43e57de4a1f818ddfbfd0">insertZeroBit</a>(number, curMin);</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  </div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="comment">// set curMin to an arbitrary non-visited elem</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  prevMin = curMin;</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> t=0; t < numInds; t++)</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordflow">if</span> (inds[t] > curMin) {</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  curMin = inds[t];</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  }</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  }</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordflow">return</span> number;</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> }</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  </div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  </div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  </div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment"> * state vector and density matrix operations </span></div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  </div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="preprocessor">#ifdef __cplusplus</span></div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="keyword">extern</span> <span class="stringliteral">"C"</span> {</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  </div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  </div>
<div class="line"><a name="l00153"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#aa121d55f2ca09c06a96ddcd433c60b0f"> 153</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#aa121d55f2ca09c06a96ddcd433c60b0f">statevec_setAmps</a>(<a class="code" href="structQureg.html">Qureg</a> qureg, <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> startInd, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>* reals, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>* imags, <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> numAmps) {</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  </div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  cudaDeviceSynchronize();</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  cudaMemcpy(</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real + startInd, </div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  reals,</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  numAmps * <span class="keyword">sizeof</span>(*(qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real)), </div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  cudaMemcpyHostToDevice);</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  cudaMemcpy(</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag + startInd,</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  imags,</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  numAmps * <span class="keyword">sizeof</span>(*(qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag)), </div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  cudaMemcpyHostToDevice);</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> }</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  </div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  </div>
<div class="line"><a name="l00170"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#aa4b77089145184d990848cd66993aa8b"> 170</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#aa4b77089145184d990848cd66993aa8b">statevec_cloneQureg</a>(<a class="code" href="structQureg.html">Qureg</a> targetQureg, <a class="code" href="structQureg.html">Qureg</a> copyQureg) {</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  </div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="comment">// copy copyQureg's GPU statevec to targetQureg's GPU statevec</span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  cudaDeviceSynchronize();</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  cudaMemcpy(</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  targetQureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real, </div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  copyQureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real, </div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  targetQureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>*<span class="keyword">sizeof</span>(*(targetQureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real)), </div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  cudaMemcpyDeviceToDevice);</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  cudaMemcpy(</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  targetQureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag, </div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  copyQureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag, </div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  targetQureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>*<span class="keyword">sizeof</span>(*(targetQureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag)), </div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  cudaMemcpyDeviceToDevice);</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span> }</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  </div>
<div class="line"><a name="l00186"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a664339e2afc50b0418a56adfc1bc512e"> 186</a></span> __global__ <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a664339e2afc50b0418a56adfc1bc512e">densmatr_initPureStateKernel</a>(</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> numPureAmps,</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *targetVecReal, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *targetVecImag, </div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *copyVecReal, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *copyVecImag) </div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> {</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="comment">// this is a particular index of the pure copyQureg</span></div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> index = blockIdx.x*blockDim.x + threadIdx.x;</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="keywordflow">if</span> (index>=numPureAmps) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  </div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> realRow = copyVecReal[index];</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> imagRow = copyVecImag[index];</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordflow">for</span> (<span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> col=0; col < numPureAmps; col++) {</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> realCol = copyVecReal[col];</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> imagCol = - copyVecImag[col]; <span class="comment">// minus for conjugation</span></div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  targetVecReal[col*numPureAmps + index] = realRow*realCol - imagRow*imagCol;</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  targetVecImag[col*numPureAmps + index] = realRow*imagCol + imagRow*realCol;</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  }</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> }</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  </div>
<div class="line"><a name="l00205"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#ae5ad68d054875913d0f7ec654840a9ec"> 205</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#ae5ad68d054875913d0f7ec654840a9ec">densmatr_initPureState</a>(<a class="code" href="structQureg.html">Qureg</a> targetQureg, <a class="code" href="structQureg.html">Qureg</a> copyQureg)</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span> {</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="keywordtype">int</span> threadsPerCUDABlock, CUDABlocks;</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  threadsPerCUDABlock = 128;</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  CUDABlocks = ceil((<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>)(copyQureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>)/threadsPerCUDABlock);</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  densmatr_initPureStateKernel<<<CUDABlocks, threadsPerCUDABlock>>>(</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  copyQureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>,</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  targetQureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real, targetQureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag,</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  copyQureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real, copyQureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag);</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span> }</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  </div>
<div class="line"><a name="l00216"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a4cf98d55602d1138a2101c158095afdc"> 216</a></span> __global__ <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a4cf98d55602d1138a2101c158095afdc">densmatr_initPlusStateKernel</a>(<span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> stateVecSize, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> probFactor, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecReal, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecImag){</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> index;</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  </div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  index = blockIdx.x*blockDim.x + threadIdx.x;</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keywordflow">if</span> (index>=stateVecSize) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  </div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  stateVecReal[index] = probFactor;</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  stateVecImag[index] = 0.0;</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span> }</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  </div>
<div class="line"><a name="l00226"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#ad5b2ac0b00afa495f385520b2c5fa839"> 226</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#ad5b2ac0b00afa495f385520b2c5fa839">densmatr_initPlusState</a>(<a class="code" href="structQureg.html">Qureg</a> qureg)</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> {</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> probFactor = 1.0/((<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>) (1LL << qureg.<a class="code" href="structQureg.html#ad08dff5316b8937f4b2a1417591543dc">numQubitsRepresented</a>));</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordtype">int</span> threadsPerCUDABlock, CUDABlocks;</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  threadsPerCUDABlock = 128;</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  CUDABlocks = ceil((<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>)(qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>)/threadsPerCUDABlock);</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  densmatr_initPlusStateKernel<<<CUDABlocks, threadsPerCUDABlock>>>(</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>, </div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  probFactor,</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real, </div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag);</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> }</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  </div>
<div class="line"><a name="l00239"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a9f4bb112d5e95abb8e35bf051a02a06e"> 239</a></span> __global__ <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a9f4bb112d5e95abb8e35bf051a02a06e">densmatr_initClassicalStateKernel</a>(</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> densityNumElems, </div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *densityReal, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *densityImag, </div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> densityInd)</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span> {</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="comment">// initialise the state to all zeros</span></div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> index = blockIdx.x*blockDim.x + threadIdx.x;</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keywordflow">if</span> (index >= densityNumElems) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  </div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  densityReal[index] = 0.0;</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  densityImag[index] = 0.0;</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  </div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keywordflow">if</span> (index==densityInd){</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="comment">// classical state has probability 1</span></div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  densityReal[densityInd] = 1.0;</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  densityImag[densityInd] = 0.0;</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  }</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span> }</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  </div>
<div class="line"><a name="l00258"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a20a155f53efc45c16803d7539c2c199d"> 258</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a20a155f53efc45c16803d7539c2c199d">densmatr_initClassicalState</a>(<a class="code" href="structQureg.html">Qureg</a> qureg, <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> stateInd)</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span> {</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keywordtype">int</span> threadsPerCUDABlock, CUDABlocks;</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  threadsPerCUDABlock = 128;</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  CUDABlocks = ceil((<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>)(qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>)/threadsPerCUDABlock);</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  </div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  <span class="comment">// index of the desired state in the flat density matrix</span></div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> densityDim = 1LL << qureg.<a class="code" href="structQureg.html#ad08dff5316b8937f4b2a1417591543dc">numQubitsRepresented</a>;</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> densityInd = (densityDim + 1)*stateInd;</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  </div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="comment">// identical to pure version</span></div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  densmatr_initClassicalStateKernel<<<CUDABlocks, threadsPerCUDABlock>>>(</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>, </div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real, </div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag, densityInd);</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span> }</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  </div>
<div class="line"><a name="l00275"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a365bbb1b80cb00405c8bf1a4fa1ea8e5"> 275</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a365bbb1b80cb00405c8bf1a4fa1ea8e5">statevec_createQureg</a>(<a class="code" href="structQureg.html">Qureg</a> *qureg, <span class="keywordtype">int</span> numQubits, <a class="code" href="structQuESTEnv.html">QuESTEnv</a> env)</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span> { </div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <span class="comment">// allocate CPU memory</span></div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> numAmps = 1L << numQubits;</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> numAmpsPerRank = numAmps/env.<a class="code" href="structQuESTEnv.html#af22aacd7c9905accae28484785c193b4">numRanks</a>;</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  qureg-><a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.real = (<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>*) malloc(numAmpsPerRank * <span class="keyword">sizeof</span>(qureg-><a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.real));</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  qureg-><a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.imag = (<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>*) malloc(numAmpsPerRank * <span class="keyword">sizeof</span>(qureg-><a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.imag));</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keywordflow">if</span> (env.<a class="code" href="structQuESTEnv.html#af22aacd7c9905accae28484785c193b4">numRanks</a>>1){</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  qureg-><a class="code" href="structQureg.html#aba97773694870ef35e378c036f486bb7">pairStateVec</a>.real = (<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>*) malloc(numAmpsPerRank * <span class="keyword">sizeof</span>(qureg-><a class="code" href="structQureg.html#aba97773694870ef35e378c036f486bb7">pairStateVec</a>.real));</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  qureg-><a class="code" href="structQureg.html#aba97773694870ef35e378c036f486bb7">pairStateVec</a>.imag = (<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>*) malloc(numAmpsPerRank * <span class="keyword">sizeof</span>(qureg-><a class="code" href="structQureg.html#aba97773694870ef35e378c036f486bb7">pairStateVec</a>.imag));</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  }</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  </div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="comment">// check cpu memory allocation was successful</span></div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keywordflow">if</span> ( (!(qureg-><a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.real) || !(qureg-><a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.imag))</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  && numAmpsPerRank ) {</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  printf(<span class="stringliteral">"Could not allocate memory!\n"</span>);</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  exit (EXIT_FAILURE);</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  }</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="keywordflow">if</span> ( env.<a class="code" href="structQuESTEnv.html#af22aacd7c9905accae28484785c193b4">numRanks</a>>1 && (!(qureg-><a class="code" href="structQureg.html#aba97773694870ef35e378c036f486bb7">pairStateVec</a>.real) || !(qureg-><a class="code" href="structQureg.html#aba97773694870ef35e378c036f486bb7">pairStateVec</a>.imag))</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  && numAmpsPerRank ) {</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  printf(<span class="stringliteral">"Could not allocate memory!\n"</span>);</div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  exit (EXIT_FAILURE);</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  }</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  </div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  qureg-><a class="code" href="structQureg.html#a0a86e8a50ea8c998b4a0a6640c5a1218">numQubitsInStateVec</a> = numQubits;</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  qureg-><a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a> = numAmpsPerRank;</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  qureg-><a class="code" href="structQureg.html#adef4935cac95763c29164cf99b144ed4">numAmpsTotal</a> = numAmps;</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  qureg-><a class="code" href="structQureg.html#ac2929e681d3d95591c18cf168dbbe4f0">chunkId</a> = env.<a class="code" href="structQuESTEnv.html#aa648bb336cf8598467cb62db00b9cee8">rank</a>;</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  qureg-><a class="code" href="structQureg.html#aa3deb7163aab90a61e755a1f200f5413">numChunks</a> = env.<a class="code" href="structQuESTEnv.html#af22aacd7c9905accae28484785c193b4">numRanks</a>;</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  qureg-><a class="code" href="structQureg.html#acf78445e9435d09f44f0cc832c6aee79">isDensityMatrix</a> = 0;</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  </div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="comment">// allocate GPU memory</span></div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  cudaMalloc(&(qureg-><a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real), qureg-><a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>*<span class="keyword">sizeof</span>(*(qureg-><a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real)));</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  cudaMalloc(&(qureg-><a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag), qureg-><a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>*<span class="keyword">sizeof</span>(*(qureg-><a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag)));</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  cudaMalloc(&(qureg-><a class="code" href="structQureg.html#a2d0007a026a4231b338a5037c4e861b2">firstLevelReduction</a>), ceil(qureg-><a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>/(<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>)<a class="code" href="QuEST__gpu_8cu.html#aa57d77a0903e334e963c66ddc5ed3f53">REDUCE_SHARED_SIZE</a>)*<span class="keyword">sizeof</span>(<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>));</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  cudaMalloc(&(qureg-><a class="code" href="structQureg.html#a8bb9f7517470a0cc406951935f37b64f">secondLevelReduction</a>), ceil(qureg-><a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>/(<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>)(<a class="code" href="QuEST__gpu_8cu.html#aa57d77a0903e334e963c66ddc5ed3f53">REDUCE_SHARED_SIZE</a>*<a class="code" href="QuEST__gpu_8cu.html#aa57d77a0903e334e963c66ddc5ed3f53">REDUCE_SHARED_SIZE</a>))*</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="keyword">sizeof</span>(<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>));</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  </div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="comment">// check gpu memory allocation was successful</span></div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keywordflow">if</span> (!(qureg-><a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real) || !(qureg-><a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag)){</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  printf(<span class="stringliteral">"Could not allocate memory on GPU!\n"</span>);</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  exit (EXIT_FAILURE);</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  }</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  </div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> }</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  </div>
<div class="line"><a name="l00321"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a2a52ad9f9ad9b2fd6a76f6d433b3b217"> 321</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a2a52ad9f9ad9b2fd6a76f6d433b3b217">statevec_destroyQureg</a>(<a class="code" href="structQureg.html">Qureg</a> qureg, <a class="code" href="structQuESTEnv.html">QuESTEnv</a> env)</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span> {</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  <span class="comment">// Free CPU memory</span></div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  free(qureg.<a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.real);</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  free(qureg.<a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.imag);</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="keywordflow">if</span> (env.<a class="code" href="structQuESTEnv.html#af22aacd7c9905accae28484785c193b4">numRanks</a>>1){</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  free(qureg.<a class="code" href="structQureg.html#aba97773694870ef35e378c036f486bb7">pairStateVec</a>.real);</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  free(qureg.<a class="code" href="structQureg.html#aba97773694870ef35e378c036f486bb7">pairStateVec</a>.imag);</div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  }</div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  </div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="comment">// Free GPU memory</span></div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  cudaFree(qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real);</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  cudaFree(qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag);</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  cudaFree(qureg.<a class="code" href="structQureg.html#a2d0007a026a4231b338a5037c4e861b2">firstLevelReduction</a>);</div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  cudaFree(qureg.<a class="code" href="structQureg.html#a8bb9f7517470a0cc406951935f37b64f">secondLevelReduction</a>);</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span> }</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  </div>
<div class="line"><a name="l00338"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a0b84e6766bd682708e6211276ff0a5bb"> 338</a></span> <a class="code" href="structDiagonalOp.html">DiagonalOp</a> <a class="code" href="QuEST__gpu_8cu.html#a0b84e6766bd682708e6211276ff0a5bb">agnostic_createDiagonalOp</a>(<span class="keywordtype">int</span> numQubits, <a class="code" href="structQuESTEnv.html">QuESTEnv</a> env) {</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  </div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <a class="code" href="structDiagonalOp.html">DiagonalOp</a> op;</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  op.<a class="code" href="structDiagonalOp.html#a5131eeb67aafb4c19ac98270c3266742">numQubits</a> = numQubits;</div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  op.<a class="code" href="structDiagonalOp.html#a2c6eab631ef48b4978db026c98180eee">numElemsPerChunk</a> = (1LL << numQubits) / env.<a class="code" href="structQuESTEnv.html#af22aacd7c9905accae28484785c193b4">numRanks</a>;</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  op.<a class="code" href="structDiagonalOp.html#aa91713a22c95a383bba55e56c4a4e37a">chunkId</a> = env.<a class="code" href="structQuESTEnv.html#aa648bb336cf8598467cb62db00b9cee8">rank</a>;</div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  op.<a class="code" href="structDiagonalOp.html#ada3bffa8e414f883e415dd74e46cd879">numChunks</a> = env.<a class="code" href="structQuESTEnv.html#af22aacd7c9905accae28484785c193b4">numRanks</a>;</div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  </div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  <span class="comment">// allocate CPU memory (initialised to zero)</span></div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  op.<a class="code" href="structDiagonalOp.html#a1d66088bed235d524cd452b107694d5c">real</a> = (<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>*) calloc(op.<a class="code" href="structDiagonalOp.html#a2c6eab631ef48b4978db026c98180eee">numElemsPerChunk</a>, <span class="keyword">sizeof</span>(<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>));</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  op.<a class="code" href="structDiagonalOp.html#a85c3f52533efe831bbe40b9a48602388">imag</a> = (<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>*) calloc(op.<a class="code" href="structDiagonalOp.html#a2c6eab631ef48b4978db026c98180eee">numElemsPerChunk</a>, <span class="keyword">sizeof</span>(<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>));</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="comment">// @TODO no handling of rank>1 allocation (no distributed GPU)</span></div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  </div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="comment">// check cpu memory allocation was successful</span></div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  <span class="keywordflow">if</span> ( !op.<a class="code" href="structDiagonalOp.html#a1d66088bed235d524cd452b107694d5c">real</a> || !op.<a class="code" href="structDiagonalOp.html#a85c3f52533efe831bbe40b9a48602388">imag</a> ) {</div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  printf(<span class="stringliteral">"Could not allocate memory!\n"</span>);</div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  exit(EXIT_FAILURE);</div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  }</div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  </div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  <span class="comment">// allocate GPU memory</span></div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  <span class="keywordtype">size_t</span> arrSize = op.<a class="code" href="structDiagonalOp.html#a2c6eab631ef48b4978db026c98180eee">numElemsPerChunk</a> * <span class="keyword">sizeof</span>(<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>);</div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  cudaMalloc(&(op.<a class="code" href="structDiagonalOp.html#aebb8af156861c4bc0dd4f35f6982570a">deviceOperator</a>.real), arrSize);</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  cudaMalloc(&(op.<a class="code" href="structDiagonalOp.html#aebb8af156861c4bc0dd4f35f6982570a">deviceOperator</a>.imag), arrSize);</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  </div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <span class="comment">// check gpu memory allocation was successful</span></div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  <span class="keywordflow">if</span> (!op.<a class="code" href="structDiagonalOp.html#aebb8af156861c4bc0dd4f35f6982570a">deviceOperator</a>.real || !op.<a class="code" href="structDiagonalOp.html#aebb8af156861c4bc0dd4f35f6982570a">deviceOperator</a>.imag) {</div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  printf(<span class="stringliteral">"Could not allocate memory on GPU!\n"</span>);</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  exit(EXIT_FAILURE);</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  }</div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  </div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <span class="comment">// initialise GPU memory to zero</span></div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  cudaMemset(op.<a class="code" href="structDiagonalOp.html#aebb8af156861c4bc0dd4f35f6982570a">deviceOperator</a>.real, 0, arrSize);</div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  cudaMemset(op.<a class="code" href="structDiagonalOp.html#aebb8af156861c4bc0dd4f35f6982570a">deviceOperator</a>.imag, 0, arrSize);</div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  </div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <span class="keywordflow">return</span> op;</div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span> }</div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  </div>
<div class="line"><a name="l00375"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#af798bb01f922804016c4c5bc8d0a580f"> 375</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#af798bb01f922804016c4c5bc8d0a580f">agnostic_destroyDiagonalOp</a>(<a class="code" href="structDiagonalOp.html">DiagonalOp</a> op) {</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  free(op.<a class="code" href="structDiagonalOp.html#a1d66088bed235d524cd452b107694d5c">real</a>);</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  free(op.<a class="code" href="structDiagonalOp.html#a85c3f52533efe831bbe40b9a48602388">imag</a>);</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  cudaFree(op.<a class="code" href="structDiagonalOp.html#aebb8af156861c4bc0dd4f35f6982570a">deviceOperator</a>.real);</div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  cudaFree(op.<a class="code" href="structDiagonalOp.html#aebb8af156861c4bc0dd4f35f6982570a">deviceOperator</a>.imag);</div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span> }</div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  </div>
<div class="line"><a name="l00382"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a1e8f917ab42d38d8c37ba6816b24f2f5"> 382</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a1e8f917ab42d38d8c37ba6816b24f2f5">agnostic_syncDiagonalOp</a>(<a class="code" href="structDiagonalOp.html">DiagonalOp</a> op) {</div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  cudaDeviceSynchronize();</div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="keywordtype">size_t</span> mem_elems = op.<a class="code" href="structDiagonalOp.html#a2c6eab631ef48b4978db026c98180eee">numElemsPerChunk</a> * <span class="keyword">sizeof</span> *op.<a class="code" href="structDiagonalOp.html#a1d66088bed235d524cd452b107694d5c">real</a>;</div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  cudaMemcpy(op.<a class="code" href="structDiagonalOp.html#aebb8af156861c4bc0dd4f35f6982570a">deviceOperator</a>.real, op.<a class="code" href="structDiagonalOp.html#a1d66088bed235d524cd452b107694d5c">real</a>, mem_elems, cudaMemcpyHostToDevice);</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  cudaMemcpy(op.<a class="code" href="structDiagonalOp.html#aebb8af156861c4bc0dd4f35f6982570a">deviceOperator</a>.imag, op.<a class="code" href="structDiagonalOp.html#a85c3f52533efe831bbe40b9a48602388">imag</a>, mem_elems, cudaMemcpyHostToDevice);</div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span> }</div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  </div>
<div class="line"><a name="l00389"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a9bf24d5da6a5e78888c393a73fe45f0a"> 389</a></span> __global__ <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a9bf24d5da6a5e78888c393a73fe45f0a">agnostic_initDiagonalOpFromPauliHamilKernel</a>(</div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  <a class="code" href="structDiagonalOp.html">DiagonalOp</a> op, <span class="keyword">enum</span> <a class="code" href="group__type.html#ga1c703cf89629e4e9c7023cd402d67028">pauliOpType</a>* pauliCodes, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>* termCoeffs, <span class="keywordtype">int</span> numSumTerms</div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span> ) { </div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  <span class="comment">// each thread processes one diagonal element</span></div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> elemInd = blockIdx.x*blockDim.x + threadIdx.x;</div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  <span class="keywordflow">if</span> (elemInd >= op.<a class="code" href="structDiagonalOp.html#a2c6eab631ef48b4978db026c98180eee">numElemsPerChunk</a>)</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  </div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> elem = 0;</div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  </div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  <span class="comment">// elem is (+-) every coefficient, with sign determined by parity</span></div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> t=0; t<numSumTerms; t++) {</div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  </div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  <span class="comment">// determine the parity of the Z-targeted qubits in the element's corresponding state</span></div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="keywordtype">int</span> isOddNumOnes = 0;</div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> q=0; q<op.<a class="code" href="structDiagonalOp.html#a5131eeb67aafb4c19ac98270c3266742">numQubits</a>; q++)</div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <span class="keywordflow">if</span> (pauliCodes[q + t*op.<a class="code" href="structDiagonalOp.html#a5131eeb67aafb4c19ac98270c3266742">numQubits</a>] == <a class="code" href="group__type.html#gga1c703cf89629e4e9c7023cd402d67028a085c85cff6ba79c52d8b1e61c42ddddf">PAULI_Z</a>)</div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  <span class="keywordflow">if</span> (<a class="code" href="QuEST__gpu_8cu.html#aec1852e1a8e70d3690919ce8ab551ba0">extractBit</a>(q, elemInd))</div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  isOddNumOnes = !isOddNumOnes;</div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  </div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  <span class="comment">// avoid warp divergence</span></div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  <span class="keywordtype">int</span> sign = 1 - 2*isOddNumOnes; <span class="comment">// (-1 if isOddNumOnes, else +1)</span></div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  elem += termCoeffs[t] * sign;</div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  }</div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  </div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  op.<a class="code" href="structDiagonalOp.html#aebb8af156861c4bc0dd4f35f6982570a">deviceOperator</a>.real[elemInd] = elem;</div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  op.<a class="code" href="structDiagonalOp.html#aebb8af156861c4bc0dd4f35f6982570a">deviceOperator</a>.imag[elemInd] = 0;</div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span> }</div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  </div>
<div class="line"><a name="l00418"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a81a87bb0f0805c9dfcb691f6cb15a1b5"> 418</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a81a87bb0f0805c9dfcb691f6cb15a1b5">agnostic_initDiagonalOpFromPauliHamil</a>(<a class="code" href="structDiagonalOp.html">DiagonalOp</a> op, <a class="code" href="structPauliHamil.html">PauliHamil</a> hamil) {</div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  </div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  <span class="comment">// copy args intop GPU memory</span></div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  <span class="keyword">enum</span> <a class="code" href="group__type.html#ga1c703cf89629e4e9c7023cd402d67028">pauliOpType</a>* d_pauliCodes;</div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  <span class="keywordtype">size_t</span> mem_pauliCodes = hamil.<a class="code" href="structPauliHamil.html#a737e46b40ef8990cf004d22eb9dbe2e4">numSumTerms</a> * op.<a class="code" href="structDiagonalOp.html#a5131eeb67aafb4c19ac98270c3266742">numQubits</a> * <span class="keyword">sizeof</span> *d_pauliCodes;</div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  cudaMalloc(&d_pauliCodes, mem_pauliCodes);</div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  cudaMemcpy(d_pauliCodes, hamil.<a class="code" href="structPauliHamil.html#a4b8d38c403553c07ceddcd40c46ce6c8">pauliCodes</a>, mem_pauliCodes, cudaMemcpyHostToDevice);</div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  </div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>* d_termCoeffs;</div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  <span class="keywordtype">size_t</span> mem_termCoeffs = hamil.<a class="code" href="structPauliHamil.html#a737e46b40ef8990cf004d22eb9dbe2e4">numSumTerms</a> * <span class="keyword">sizeof</span> *d_termCoeffs;</div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  cudaMalloc(&d_termCoeffs, mem_termCoeffs);</div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  cudaMemcpy(d_termCoeffs, hamil.<a class="code" href="structPauliHamil.html#ac1c6c9f6299cf83bbba88123216c3cac">termCoeffs</a>, mem_termCoeffs, cudaMemcpyHostToDevice);</div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  </div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  <span class="keywordtype">int</span> numThreadsPerBlock = 128;</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  <span class="keywordtype">int</span> numBlocks = ceil(op.<a class="code" href="structDiagonalOp.html#a2c6eab631ef48b4978db026c98180eee">numElemsPerChunk</a> / (<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>) numThreadsPerBlock);</div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  agnostic_initDiagonalOpFromPauliHamilKernel<<<numBlocks, numThreadsPerBlock>>>(</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  op, d_pauliCodes, d_termCoeffs, hamil.<a class="code" href="structPauliHamil.html#a737e46b40ef8990cf004d22eb9dbe2e4">numSumTerms</a>);</div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  </div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  <span class="comment">// copy populated operator into to RAM</span></div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  cudaDeviceSynchronize();</div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  <span class="keywordtype">size_t</span> mem_elems = op.numElemsPerChunk * <span class="keyword">sizeof</span> *op.real;</div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  cudaMemcpy(op.real, op.deviceOperator.real, mem_elems, cudaMemcpyDeviceToHost);</div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  cudaMemcpy(op.imag, op.deviceOperator.imag, mem_elems, cudaMemcpyDeviceToHost);</div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  </div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  cudaFree(d_pauliCodes);</div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  cudaFree(d_termCoeffs);</div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span> }</div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  </div>
<div class="line"><a name="l00446"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a0aabd5ed69a74e5bc0b46a17af45c886"> 446</a></span> <span class="keywordtype">int</span> <a class="code" href="QuEST__gpu_8cu.html#a0aabd5ed69a74e5bc0b46a17af45c886">GPUExists</a>(<span class="keywordtype">void</span>){</div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  <span class="keywordtype">int</span> deviceCount, device;</div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  <span class="keywordtype">int</span> gpuDeviceCount = 0;</div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  <span class="keyword">struct </span>cudaDeviceProp properties;</div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  cudaError_t cudaResultCode = cudaGetDeviceCount(&deviceCount);</div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="keywordflow">if</span> (cudaResultCode != cudaSuccess) deviceCount = 0;</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  <span class="comment">/* machines with no GPUs can still report one emulation device */</span></div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  <span class="keywordflow">for</span> (device = 0; device < deviceCount; ++device) {</div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  cudaGetDeviceProperties(&properties, device);</div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  <span class="keywordflow">if</span> (properties.major != 9999) { <span class="comment">/* 9999 means emulation only */</span></div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  ++gpuDeviceCount;</div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  }</div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  }</div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  <span class="keywordflow">if</span> (gpuDeviceCount) <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  <span class="keywordflow">else</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span> }</div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  </div>
<div class="line"><a name="l00463"></a><span class="lineno"><a class="line" href="group__type.html#ga8ba2c3388dd64d9348c3b091852d36d4"> 463</a></span> <a class="code" href="structQuESTEnv.html">QuESTEnv</a> <a class="code" href="group__type.html#ga8ba2c3388dd64d9348c3b091852d36d4">createQuESTEnv</a>(<span class="keywordtype">void</span>) {</div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  </div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  <span class="keywordflow">if</span> (!<a class="code" href="QuEST__gpu_8cu.html#a0aabd5ed69a74e5bc0b46a17af45c886">GPUExists</a>()){</div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  printf(<span class="stringliteral">"Trying to run GPU code with no GPU available\n"</span>);</div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  exit(EXIT_FAILURE);</div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  }</div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  </div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  <a class="code" href="structQuESTEnv.html">QuESTEnv</a> env;</div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  env.<a class="code" href="structQuESTEnv.html#aa648bb336cf8598467cb62db00b9cee8">rank</a>=0;</div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  env.<a class="code" href="structQuESTEnv.html#af22aacd7c9905accae28484785c193b4">numRanks</a>=1;</div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  </div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  env.<a class="code" href="structQuESTEnv.html#a66feaa60d3adc7dcf6f8b66514989356">seeds</a> = NULL;</div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  env.<a class="code" href="structQuESTEnv.html#a46e67e1a5ab930e04ff59f83f1d8630d">numSeeds</a> = 0;</div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  <a class="code" href="group__debug.html#gae53fad7ebafccf236ad62b41e3244214">seedQuESTDefault</a>(env);</div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  </div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  <span class="keywordflow">return</span> env;</div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span> }</div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  </div>
<div class="line"><a name="l00481"></a><span class="lineno"><a class="line" href="group__debug.html#ga8d31fe2d1ad4d01e2a1f5f6b8bc15b77"> 481</a></span> <span class="keywordtype">void</span> <a class="code" href="group__debug.html#ga8d31fe2d1ad4d01e2a1f5f6b8bc15b77">syncQuESTEnv</a>(<a class="code" href="structQuESTEnv.html">QuESTEnv</a> env){</div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  cudaDeviceSynchronize();</div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span> } </div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  </div>
<div class="line"><a name="l00485"></a><span class="lineno"><a class="line" href="group__debug.html#gac7e38d768a1bd79019f88cc1e6295092"> 485</a></span> <span class="keywordtype">int</span> <a class="code" href="group__debug.html#gac7e38d768a1bd79019f88cc1e6295092">syncQuESTSuccess</a>(<span class="keywordtype">int</span> successCode){</div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  <span class="keywordflow">return</span> successCode;</div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span> }</div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  </div>
<div class="line"><a name="l00489"></a><span class="lineno"><a class="line" href="group__type.html#gaeff624226629d7063a8a776958a4f991"> 489</a></span> <span class="keywordtype">void</span> <a class="code" href="group__type.html#gaeff624226629d7063a8a776958a4f991">destroyQuESTEnv</a>(<a class="code" href="structQuESTEnv.html">QuESTEnv</a> env){</div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  free(env.<a class="code" href="structQuESTEnv.html#a66feaa60d3adc7dcf6f8b66514989356">seeds</a>);</div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span> }</div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  </div>
<div class="line"><a name="l00493"></a><span class="lineno"><a class="line" href="group__debug.html#gaf8a14ae79c3fb2c0b5f6255cc37bebf9"> 493</a></span> <span class="keywordtype">void</span> <a class="code" href="group__debug.html#gaf8a14ae79c3fb2c0b5f6255cc37bebf9">reportQuESTEnv</a>(<a class="code" href="structQuESTEnv.html">QuESTEnv</a> env){</div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  printf(<span class="stringliteral">"EXECUTION ENVIRONMENT:\n"</span>);</div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span>  printf(<span class="stringliteral">"Running locally on one node with GPU\n"</span>);</div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  printf(<span class="stringliteral">"Number of ranks is %d\n"</span>, env.<a class="code" href="structQuESTEnv.html#af22aacd7c9905accae28484785c193b4">numRanks</a>);</div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span> <span class="preprocessor"># ifdef _OPENMP</span></div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  printf(<span class="stringliteral">"OpenMP enabled\n"</span>);</div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  printf(<span class="stringliteral">"Number of threads available is %d\n"</span>, omp_get_max_threads());</div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span> <span class="preprocessor"># else</span></div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  printf(<span class="stringliteral">"OpenMP disabled\n"</span>);</div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span> <span class="preprocessor"># endif</span></div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span> }</div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  </div>
<div class="line"><a name="l00505"></a><span class="lineno"><a class="line" href="group__debug.html#gadc5c01d8ea32e28c188db52be26116b6"> 505</a></span> <span class="keywordtype">void</span> <a class="code" href="group__debug.html#gadc5c01d8ea32e28c188db52be26116b6">getEnvironmentString</a>(<a class="code" href="structQuESTEnv.html">QuESTEnv</a> env, <span class="keywordtype">char</span> str[200]){</div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  </div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  <span class="comment">// OpenMP can be hybridised with GPU in future, so this check is safe and worthwhile</span></div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  <span class="keywordtype">int</span> ompStatus=0;</div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  <span class="keywordtype">int</span> numThreads=1;</div>
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span> <span class="preprocessor"># ifdef _OPENMP</span></div>
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  ompStatus=1;</div>
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  numThreads=omp_get_max_threads(); </div>
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span> <span class="preprocessor"># endif</span></div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  </div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  <span class="comment">// there is no reporting of CUDA cores/threads/blocks currently (since non-trivial)</span></div>
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  sprintf(str, <span class="stringliteral">"CUDA=1 OpenMP=%d MPI=0 threads=%d ranks=1"</span>, ompStatus, numThreads);</div>
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span> }</div>
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  </div>
<div class="line"><a name="l00519"></a><span class="lineno"><a class="line" href="group__debug.html#ga11448560006dd165128e404b54ebb2f7"> 519</a></span> <span class="keywordtype">void</span> <a class="code" href="group__debug.html#ga11448560006dd165128e404b54ebb2f7">copyStateToGPU</a>(<a class="code" href="structQureg.html">Qureg</a> qureg)</div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span> {</div>
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  <span class="keywordflow">if</span> (<a class="code" href="QuEST__gpu_8cu.html#ad72dbcf6d0153db1b8d8a58001feed83">DEBUG</a>) printf(<span class="stringliteral">"Copying data to GPU\n"</span>);</div>
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  cudaMemcpy(qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real, qureg.<a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.real, </div>
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>*<span class="keyword">sizeof</span>(*(qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real)), cudaMemcpyHostToDevice);</div>
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  cudaMemcpy(qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag, qureg.<a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.imag, </div>
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>*<span class="keyword">sizeof</span>(*(qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag)), cudaMemcpyHostToDevice);</div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  <span class="keywordflow">if</span> (<a class="code" href="QuEST__gpu_8cu.html#ad72dbcf6d0153db1b8d8a58001feed83">DEBUG</a>) printf(<span class="stringliteral">"Finished copying data to GPU\n"</span>);</div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span> }</div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  </div>
<div class="line"><a name="l00529"></a><span class="lineno"><a class="line" href="group__debug.html#ga924ef2dbda6b733b4041270077c76ece"> 529</a></span> <span class="keywordtype">void</span> <a class="code" href="group__debug.html#ga924ef2dbda6b733b4041270077c76ece">copyStateFromGPU</a>(<a class="code" href="structQureg.html">Qureg</a> qureg)</div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span> {</div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  cudaDeviceSynchronize();</div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  <span class="keywordflow">if</span> (<a class="code" href="QuEST__gpu_8cu.html#ad72dbcf6d0153db1b8d8a58001feed83">DEBUG</a>) printf(<span class="stringliteral">"Copying data from GPU\n"</span>);</div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  cudaMemcpy(qureg.<a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.real, qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real, </div>
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>*<span class="keyword">sizeof</span>(*(qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real)), cudaMemcpyDeviceToHost);</div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  cudaMemcpy(qureg.<a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.imag, qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag, </div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>*<span class="keyword">sizeof</span>(*(qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag)), cudaMemcpyDeviceToHost);</div>
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  <span class="keywordflow">if</span> (<a class="code" href="QuEST__gpu_8cu.html#ad72dbcf6d0153db1b8d8a58001feed83">DEBUG</a>) printf(<span class="stringliteral">"Finished copying data from GPU\n"</span>);</div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span> }</div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  </div>
<div class="line"><a name="l00543"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a1e57230c7995447039e62a84c0a36524"> 543</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a1e57230c7995447039e62a84c0a36524">statevec_reportStateToScreen</a>(<a class="code" href="structQureg.html">Qureg</a> qureg, <a class="code" href="structQuESTEnv.html">QuESTEnv</a> env, <span class="keywordtype">int</span> reportRank){</div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> index;</div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  <span class="keywordtype">int</span> rank;</div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  <a class="code" href="group__debug.html#ga924ef2dbda6b733b4041270077c76ece">copyStateFromGPU</a>(qureg); </div>
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  <span class="keywordflow">if</span> (qureg.<a class="code" href="structQureg.html#a0a86e8a50ea8c998b4a0a6640c5a1218">numQubitsInStateVec</a><=5){</div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  <span class="keywordflow">for</span> (rank=0; rank<qureg.<a class="code" href="structQureg.html#aa3deb7163aab90a61e755a1f200f5413">numChunks</a>; rank++){</div>
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  <span class="keywordflow">if</span> (qureg.<a class="code" href="structQureg.html#ac2929e681d3d95591c18cf168dbbe4f0">chunkId</a>==rank){</div>
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  <span class="keywordflow">if</span> (reportRank) {</div>
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  printf(<span class="stringliteral">"Reporting state from rank %d [\n"</span>, qureg.<a class="code" href="structQureg.html#ac2929e681d3d95591c18cf168dbbe4f0">chunkId</a>);</div>
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  <span class="comment">//printf("\trank, index, real, imag\n");</span></div>
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  printf(<span class="stringliteral">"real, imag\n"</span>);</div>
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (rank==0) {</div>
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  printf(<span class="stringliteral">"Reporting state [\n"</span>);</div>
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  printf(<span class="stringliteral">"real, imag\n"</span>);</div>
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  }</div>
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  </div>
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  <span class="keywordflow">for</span>(index=0; index<qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>; index++){</div>
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  printf(REAL_STRING_FORMAT <span class="stringliteral">", "</span> REAL_STRING_FORMAT <span class="stringliteral">"\n"</span>, qureg.<a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.real[index], qureg.<a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.imag[index]);</div>
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  }</div>
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  <span class="keywordflow">if</span> (reportRank || rank==qureg.<a class="code" href="structQureg.html#aa3deb7163aab90a61e755a1f200f5413">numChunks</a>-1) printf(<span class="stringliteral">"]\n"</span>);</div>
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  }</div>
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  <a class="code" href="group__debug.html#ga8d31fe2d1ad4d01e2a1f5f6b8bc15b77">syncQuESTEnv</a>(env);</div>
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  }</div>
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  }</div>
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span> }</div>
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  </div>
<div class="line"><a name="l00569"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#abc9a9ef4344c7faaaf28ac25c76649b9"> 569</a></span> <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> <a class="code" href="QuEST__gpu_8cu.html#abc9a9ef4344c7faaaf28ac25c76649b9">statevec_getRealAmp</a>(<a class="code" href="structQureg.html">Qureg</a> qureg, <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> index){</div>
<div class="line"><a name="l00570"></a><span class="lineno"> 570</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> el=0;</div>
<div class="line"><a name="l00571"></a><span class="lineno"> 571</span>  cudaMemcpy(&el, &(qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real[index]), </div>
<div class="line"><a name="l00572"></a><span class="lineno"> 572</span>  <span class="keyword">sizeof</span>(*(qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real)), cudaMemcpyDeviceToHost);</div>
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  <span class="keywordflow">return</span> el;</div>
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span> }</div>
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  </div>
<div class="line"><a name="l00576"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#abd509244d57657e148e4084c5ab5d28f"> 576</a></span> <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> <a class="code" href="QuEST__gpu_8cu.html#abd509244d57657e148e4084c5ab5d28f">statevec_getImagAmp</a>(<a class="code" href="structQureg.html">Qureg</a> qureg, <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> index){</div>
<div class="line"><a name="l00577"></a><span class="lineno"> 577</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> el=0;</div>
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  cudaMemcpy(&el, &(qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag[index]), </div>
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  <span class="keyword">sizeof</span>(*(qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag)), cudaMemcpyDeviceToHost);</div>
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  <span class="keywordflow">return</span> el;</div>
<div class="line"><a name="l00581"></a><span class="lineno"> 581</span> }</div>
<div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  </div>
<div class="line"><a name="l00583"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a2116805f30cb063a0e7c0341583d1550"> 583</a></span> __global__ <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a2116805f30cb063a0e7c0341583d1550">statevec_initBlankStateKernel</a>(<span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> stateVecSize, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecReal, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecImag){</div>
<div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> index;</div>
<div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  </div>
<div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  <span class="comment">// initialise the statevector to be all-zeros</span></div>
<div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  index = blockIdx.x*blockDim.x + threadIdx.x;</div>
<div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  <span class="keywordflow">if</span> (index>=stateVecSize) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  stateVecReal[index] = 0.0;</div>
<div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  stateVecImag[index] = 0.0;</div>
<div class="line"><a name="l00591"></a><span class="lineno"> 591</span> }</div>
<div class="line"><a name="l00592"></a><span class="lineno"> 592</span>  </div>
<div class="line"><a name="l00593"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a758bad4237ff0bf3b4ff5be626a982ae"> 593</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a758bad4237ff0bf3b4ff5be626a982ae">statevec_initBlankState</a>(<a class="code" href="structQureg.html">Qureg</a> qureg)</div>
<div class="line"><a name="l00594"></a><span class="lineno"> 594</span> {</div>
<div class="line"><a name="l00595"></a><span class="lineno"> 595</span>  <span class="keywordtype">int</span> threadsPerCUDABlock, CUDABlocks;</div>
<div class="line"><a name="l00596"></a><span class="lineno"> 596</span>  threadsPerCUDABlock = 128;</div>
<div class="line"><a name="l00597"></a><span class="lineno"> 597</span>  CUDABlocks = ceil((<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>)(qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>)/threadsPerCUDABlock);</div>
<div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  statevec_initBlankStateKernel<<<CUDABlocks, threadsPerCUDABlock>>>(</div>
<div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>, </div>
<div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real, </div>
<div class="line"><a name="l00601"></a><span class="lineno"> 601</span>  qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag);</div>
<div class="line"><a name="l00602"></a><span class="lineno"> 602</span> }</div>
<div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  </div>
<div class="line"><a name="l00604"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a43b35abfab0d6093b052e2c2e4b15064"> 604</a></span> __global__ <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a43b35abfab0d6093b052e2c2e4b15064">statevec_initZeroStateKernel</a>(<span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> stateVecSize, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecReal, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecImag){</div>
<div class="line"><a name="l00605"></a><span class="lineno"> 605</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> index;</div>
<div class="line"><a name="l00606"></a><span class="lineno"> 606</span>  </div>
<div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  <span class="comment">// initialise the state to |0000..0000></span></div>
<div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  index = blockIdx.x*blockDim.x + threadIdx.x;</div>
<div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  <span class="keywordflow">if</span> (index>=stateVecSize) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  stateVecReal[index] = 0.0;</div>
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  stateVecImag[index] = 0.0;</div>
<div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  </div>
<div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  <span class="keywordflow">if</span> (index==0){</div>
<div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  <span class="comment">// zero state |0000..0000> has probability 1</span></div>
<div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  stateVecReal[0] = 1.0;</div>
<div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  stateVecImag[0] = 0.0;</div>
<div class="line"><a name="l00617"></a><span class="lineno"> 617</span>  }</div>
<div class="line"><a name="l00618"></a><span class="lineno"> 618</span> }</div>
<div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  </div>
<div class="line"><a name="l00620"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a2ca0c6ba07ab2b4b437321bf17efc966"> 620</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a2ca0c6ba07ab2b4b437321bf17efc966">statevec_initZeroState</a>(<a class="code" href="structQureg.html">Qureg</a> qureg)</div>
<div class="line"><a name="l00621"></a><span class="lineno"> 621</span> {</div>
<div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  <span class="keywordtype">int</span> threadsPerCUDABlock, CUDABlocks;</div>
<div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  threadsPerCUDABlock = 128;</div>
<div class="line"><a name="l00624"></a><span class="lineno"> 624</span>  CUDABlocks = ceil((<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>)(qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>)/threadsPerCUDABlock);</div>
<div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  statevec_initZeroStateKernel<<<CUDABlocks, threadsPerCUDABlock>>>(</div>
<div class="line"><a name="l00626"></a><span class="lineno"> 626</span>  qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>, </div>
<div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real, </div>
<div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag);</div>
<div class="line"><a name="l00629"></a><span class="lineno"> 629</span> }</div>
<div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  </div>
<div class="line"><a name="l00631"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#aaa36e3e86a5b79e676c6268fa2b02222"> 631</a></span> __global__ <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#aaa36e3e86a5b79e676c6268fa2b02222">statevec_initPlusStateKernel</a>(<span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> stateVecSize, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecReal, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecImag){</div>
<div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> index;</div>
<div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  </div>
<div class="line"><a name="l00634"></a><span class="lineno"> 634</span>  index = blockIdx.x*blockDim.x + threadIdx.x;</div>
<div class="line"><a name="l00635"></a><span class="lineno"> 635</span>  <span class="keywordflow">if</span> (index>=stateVecSize) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00636"></a><span class="lineno"> 636</span>  </div>
<div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> normFactor = 1.0/sqrt((<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>)stateVecSize);</div>
<div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  stateVecReal[index] = normFactor;</div>
<div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  stateVecImag[index] = 0.0;</div>
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span> }</div>
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  </div>
<div class="line"><a name="l00642"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a482fc361fd5f08075404c72e536316a0"> 642</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a482fc361fd5f08075404c72e536316a0">statevec_initPlusState</a>(<a class="code" href="structQureg.html">Qureg</a> qureg)</div>
<div class="line"><a name="l00643"></a><span class="lineno"> 643</span> {</div>
<div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  <span class="keywordtype">int</span> threadsPerCUDABlock, CUDABlocks;</div>
<div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  threadsPerCUDABlock = 128;</div>
<div class="line"><a name="l00646"></a><span class="lineno"> 646</span>  CUDABlocks = ceil((<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>)(qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>)/threadsPerCUDABlock);</div>
<div class="line"><a name="l00647"></a><span class="lineno"> 647</span>  statevec_initPlusStateKernel<<<CUDABlocks, threadsPerCUDABlock>>>(</div>
<div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>, </div>
<div class="line"><a name="l00649"></a><span class="lineno"> 649</span>  qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real, </div>
<div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag);</div>
<div class="line"><a name="l00651"></a><span class="lineno"> 651</span> }</div>
<div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  </div>
<div class="line"><a name="l00653"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a0f1817fe73e2911937af3979b6506ebd"> 653</a></span> __global__ <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a0f1817fe73e2911937af3979b6506ebd">statevec_initClassicalStateKernel</a>(<span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> stateVecSize, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecReal, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecImag, <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> stateInd){</div>
<div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> index;</div>
<div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  </div>
<div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  <span class="comment">// initialise the state to |stateInd></span></div>
<div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  index = blockIdx.x*blockDim.x + threadIdx.x;</div>
<div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  <span class="keywordflow">if</span> (index>=stateVecSize) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  stateVecReal[index] = 0.0;</div>
<div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  stateVecImag[index] = 0.0;</div>
<div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  </div>
<div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  <span class="keywordflow">if</span> (index==stateInd){</div>
<div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  <span class="comment">// classical state has probability 1</span></div>
<div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  stateVecReal[stateInd] = 1.0;</div>
<div class="line"><a name="l00665"></a><span class="lineno"> 665</span>  stateVecImag[stateInd] = 0.0;</div>
<div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  }</div>
<div class="line"><a name="l00667"></a><span class="lineno"> 667</span> }</div>
<div class="line"><a name="l00668"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a288dc4b46bdacd69cbf4a6fd070d26a7"> 668</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a288dc4b46bdacd69cbf4a6fd070d26a7">statevec_initClassicalState</a>(<a class="code" href="structQureg.html">Qureg</a> qureg, <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> stateInd)</div>
<div class="line"><a name="l00669"></a><span class="lineno"> 669</span> {</div>
<div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  <span class="keywordtype">int</span> threadsPerCUDABlock, CUDABlocks;</div>
<div class="line"><a name="l00671"></a><span class="lineno"> 671</span>  threadsPerCUDABlock = 128;</div>
<div class="line"><a name="l00672"></a><span class="lineno"> 672</span>  CUDABlocks = ceil((<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>)(qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>)/threadsPerCUDABlock);</div>
<div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  statevec_initClassicalStateKernel<<<CUDABlocks, threadsPerCUDABlock>>>(</div>
<div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>, </div>
<div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real, </div>
<div class="line"><a name="l00676"></a><span class="lineno"> 676</span>  qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag, stateInd);</div>
<div class="line"><a name="l00677"></a><span class="lineno"> 677</span> }</div>
<div class="line"><a name="l00678"></a><span class="lineno"> 678</span>  </div>
<div class="line"><a name="l00679"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#ad947613d4d62b0b659a0be1e9c736427"> 679</a></span> __global__ <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#ad947613d4d62b0b659a0be1e9c736427">statevec_initDebugStateKernel</a>(<span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> stateVecSize, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecReal, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecImag){</div>
<div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> index;</div>
<div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  </div>
<div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  index = blockIdx.x*blockDim.x + threadIdx.x;</div>
<div class="line"><a name="l00683"></a><span class="lineno"> 683</span>  <span class="keywordflow">if</span> (index>=stateVecSize) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00684"></a><span class="lineno"> 684</span>  </div>
<div class="line"><a name="l00685"></a><span class="lineno"> 685</span>  stateVecReal[index] = (index*2.0)/10.0;</div>
<div class="line"><a name="l00686"></a><span class="lineno"> 686</span>  stateVecImag[index] = (index*2.0+1.0)/10.0;</div>
<div class="line"><a name="l00687"></a><span class="lineno"> 687</span> }</div>
<div class="line"><a name="l00688"></a><span class="lineno"> 688</span>  </div>
<div class="line"><a name="l00689"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#ad9fd3017ea40cf63fd04b39e03494972"> 689</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#ad9fd3017ea40cf63fd04b39e03494972">statevec_initDebugState</a>(<a class="code" href="structQureg.html">Qureg</a> qureg)</div>
<div class="line"><a name="l00690"></a><span class="lineno"> 690</span> {</div>
<div class="line"><a name="l00691"></a><span class="lineno"> 691</span>  <span class="keywordtype">int</span> threadsPerCUDABlock, CUDABlocks;</div>
<div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  threadsPerCUDABlock = 128;</div>
<div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  CUDABlocks = ceil((<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>)(qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>)/threadsPerCUDABlock);</div>
<div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  statevec_initDebugStateKernel<<<CUDABlocks, threadsPerCUDABlock>>>(</div>
<div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>,</div>
<div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real, </div>
<div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag);</div>
<div class="line"><a name="l00698"></a><span class="lineno"> 698</span> }</div>
<div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  </div>
<div class="line"><a name="l00700"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#ace807c2089e172363db9ffe083f60f71"> 700</a></span> __global__ <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#ace807c2089e172363db9ffe083f60f71">statevec_initStateOfSingleQubitKernel</a>(<span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> stateVecSize, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecReal, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecImag, <span class="keywordtype">int</span> qubitId, <span class="keywordtype">int</span> outcome){</div>
<div class="line"><a name="l00701"></a><span class="lineno"> 701</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> index;</div>
<div class="line"><a name="l00702"></a><span class="lineno"> 702</span>  <span class="keywordtype">int</span> bit;</div>
<div class="line"><a name="l00703"></a><span class="lineno"> 703</span>  </div>
<div class="line"><a name="l00704"></a><span class="lineno"> 704</span>  index = blockIdx.x*blockDim.x + threadIdx.x;</div>
<div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  <span class="keywordflow">if</span> (index>=stateVecSize) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00706"></a><span class="lineno"> 706</span>  </div>
<div class="line"><a name="l00707"></a><span class="lineno"> 707</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> normFactor = 1.0/sqrt((<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>)stateVecSize/2);</div>
<div class="line"><a name="l00708"></a><span class="lineno"> 708</span>  bit = <a class="code" href="QuEST__gpu_8cu.html#aec1852e1a8e70d3690919ce8ab551ba0">extractBit</a>(qubitId, index);</div>
<div class="line"><a name="l00709"></a><span class="lineno"> 709</span>  <span class="keywordflow">if</span> (bit==outcome) {</div>
<div class="line"><a name="l00710"></a><span class="lineno"> 710</span>  stateVecReal[index] = normFactor;</div>
<div class="line"><a name="l00711"></a><span class="lineno"> 711</span>  stateVecImag[index] = 0.0;</div>
<div class="line"><a name="l00712"></a><span class="lineno"> 712</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00713"></a><span class="lineno"> 713</span>  stateVecReal[index] = 0.0;</div>
<div class="line"><a name="l00714"></a><span class="lineno"> 714</span>  stateVecImag[index] = 0.0;</div>
<div class="line"><a name="l00715"></a><span class="lineno"> 715</span>  }</div>
<div class="line"><a name="l00716"></a><span class="lineno"> 716</span> }</div>
<div class="line"><a name="l00717"></a><span class="lineno"> 717</span>  </div>
<div class="line"><a name="l00718"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a923906770cac0da9e3459bae58de9e64"> 718</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a923906770cac0da9e3459bae58de9e64">statevec_initStateOfSingleQubit</a>(<a class="code" href="structQureg.html">Qureg</a> *qureg, <span class="keywordtype">int</span> qubitId, <span class="keywordtype">int</span> outcome)</div>
<div class="line"><a name="l00719"></a><span class="lineno"> 719</span> {</div>
<div class="line"><a name="l00720"></a><span class="lineno"> 720</span>  <span class="keywordtype">int</span> threadsPerCUDABlock, CUDABlocks;</div>
<div class="line"><a name="l00721"></a><span class="lineno"> 721</span>  threadsPerCUDABlock = 128;</div>
<div class="line"><a name="l00722"></a><span class="lineno"> 722</span>  CUDABlocks = ceil((<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>)(qureg-><a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>)/threadsPerCUDABlock);</div>
<div class="line"><a name="l00723"></a><span class="lineno"> 723</span>  statevec_initStateOfSingleQubitKernel<<<CUDABlocks, threadsPerCUDABlock>>>(qureg-><a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>, qureg-><a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real, qureg-><a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag, qubitId, outcome);</div>
<div class="line"><a name="l00724"></a><span class="lineno"> 724</span> }</div>
<div class="line"><a name="l00725"></a><span class="lineno"> 725</span>  </div>
<div class="line"><a name="l00726"></a><span class="lineno"> 726</span> <span class="comment">// returns 1 if successful, else 0</span></div>
<div class="line"><a name="l00727"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a05756b45f10135bb2eeb07380f806c20"> 727</a></span> <span class="keywordtype">int</span> <a class="code" href="QuEST__gpu_8cu.html#a05756b45f10135bb2eeb07380f806c20">statevec_initStateFromSingleFile</a>(<a class="code" href="structQureg.html">Qureg</a> *qureg, <span class="keywordtype">char</span> filename[200], <a class="code" href="structQuESTEnv.html">QuESTEnv</a> env){</div>
<div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> chunkSize, stateVecSize;</div>
<div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> indexInChunk, totalIndex;</div>
<div class="line"><a name="l00730"></a><span class="lineno"> 730</span>  </div>
<div class="line"><a name="l00731"></a><span class="lineno"> 731</span>  chunkSize = qureg-><a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>;</div>
<div class="line"><a name="l00732"></a><span class="lineno"> 732</span>  stateVecSize = chunkSize*qureg-><a class="code" href="structQureg.html#aa3deb7163aab90a61e755a1f200f5413">numChunks</a>;</div>
<div class="line"><a name="l00733"></a><span class="lineno"> 733</span>  </div>
<div class="line"><a name="l00734"></a><span class="lineno"> 734</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecReal = qureg-><a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.real;</div>
<div class="line"><a name="l00735"></a><span class="lineno"> 735</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecImag = qureg-><a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.imag;</div>
<div class="line"><a name="l00736"></a><span class="lineno"> 736</span>  </div>
<div class="line"><a name="l00737"></a><span class="lineno"> 737</span>  FILE *fp;</div>
<div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  <span class="keywordtype">char</span> line[200];</div>
<div class="line"><a name="l00739"></a><span class="lineno"> 739</span>  </div>
<div class="line"><a name="l00740"></a><span class="lineno"> 740</span>  fp = fopen(filename, <span class="stringliteral">"r"</span>);</div>
<div class="line"><a name="l00741"></a><span class="lineno"> 741</span>  <span class="keywordflow">if</span> (fp == NULL)</div>
<div class="line"><a name="l00742"></a><span class="lineno"> 742</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00743"></a><span class="lineno"> 743</span>  </div>
<div class="line"><a name="l00744"></a><span class="lineno"> 744</span>  indexInChunk = 0; totalIndex = 0;</div>
<div class="line"><a name="l00745"></a><span class="lineno"> 745</span>  <span class="keywordflow">while</span> (fgets(line, <span class="keyword">sizeof</span>(<span class="keywordtype">char</span>)*200, fp) != NULL && totalIndex<stateVecSize){</div>
<div class="line"><a name="l00746"></a><span class="lineno"> 746</span>  <span class="keywordflow">if</span> (line[0]!=<span class="charliteral">'#'</span>){</div>
<div class="line"><a name="l00747"></a><span class="lineno"> 747</span>  <span class="keywordtype">int</span> chunkId = totalIndex/chunkSize;</div>
<div class="line"><a name="l00748"></a><span class="lineno"> 748</span>  <span class="keywordflow">if</span> (chunkId==qureg-><a class="code" href="structQureg.html#ac2929e681d3d95591c18cf168dbbe4f0">chunkId</a>){</div>
<div class="line"><a name="l00749"></a><span class="lineno"> 749</span> <span class="preprocessor"> # if QuEST_PREC==1</span></div>
<div class="line"><a name="l00750"></a><span class="lineno"> 750</span>  sscanf(line, <span class="stringliteral">"%f, %f"</span>, &(stateVecReal[indexInChunk]),</div>
<div class="line"><a name="l00751"></a><span class="lineno"> 751</span>  &(stateVecImag[indexInChunk]));</div>
<div class="line"><a name="l00752"></a><span class="lineno"> 752</span> <span class="preprocessor"> # elif QuEST_PREC==2</span></div>
<div class="line"><a name="l00753"></a><span class="lineno"> 753</span>  sscanf(line, <span class="stringliteral">"%lf, %lf"</span>, &(stateVecReal[indexInChunk]),</div>
<div class="line"><a name="l00754"></a><span class="lineno"> 754</span>  &(stateVecImag[indexInChunk]));</div>
<div class="line"><a name="l00755"></a><span class="lineno"> 755</span> <span class="preprocessor"> # elif QuEST_PREC==4</span></div>
<div class="line"><a name="l00756"></a><span class="lineno"> 756</span>  sscanf(line, <span class="stringliteral">"%lf, %lf"</span>, &(stateVecReal[indexInChunk]),</div>
<div class="line"><a name="l00757"></a><span class="lineno"> 757</span>  &(stateVecImag[indexInChunk]));</div>
<div class="line"><a name="l00758"></a><span class="lineno"> 758</span> <span class="preprocessor"> # endif</span></div>
<div class="line"><a name="l00759"></a><span class="lineno"> 759</span>  indexInChunk += 1;</div>
<div class="line"><a name="l00760"></a><span class="lineno"> 760</span>  }</div>
<div class="line"><a name="l00761"></a><span class="lineno"> 761</span>  totalIndex += 1;</div>
<div class="line"><a name="l00762"></a><span class="lineno"> 762</span>  }</div>
<div class="line"><a name="l00763"></a><span class="lineno"> 763</span>  }</div>
<div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  fclose(fp);</div>
<div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  <a class="code" href="group__debug.html#ga11448560006dd165128e404b54ebb2f7">copyStateToGPU</a>(*qureg);</div>
<div class="line"><a name="l00766"></a><span class="lineno"> 766</span>  </div>
<div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  <span class="comment">// indicate success</span></div>
<div class="line"><a name="l00768"></a><span class="lineno"> 768</span>  <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00769"></a><span class="lineno"> 769</span> }</div>
<div class="line"><a name="l00770"></a><span class="lineno"> 770</span>  </div>
<div class="line"><a name="l00771"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#ae6cecbad32a03416138b321cdc1a2c33"> 771</a></span> <span class="keywordtype">int</span> <a class="code" href="QuEST__gpu_8cu.html#ae6cecbad32a03416138b321cdc1a2c33">statevec_compareStates</a>(<a class="code" href="structQureg.html">Qureg</a> mq1, <a class="code" href="structQureg.html">Qureg</a> mq2, <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> precision){</div>
<div class="line"><a name="l00772"></a><span class="lineno"> 772</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> diff;</div>
<div class="line"><a name="l00773"></a><span class="lineno"> 773</span>  <span class="keywordtype">int</span> chunkSize = mq1.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>;</div>
<div class="line"><a name="l00774"></a><span class="lineno"> 774</span>  </div>
<div class="line"><a name="l00775"></a><span class="lineno"> 775</span>  <a class="code" href="group__debug.html#ga924ef2dbda6b733b4041270077c76ece">copyStateFromGPU</a>(mq1);</div>
<div class="line"><a name="l00776"></a><span class="lineno"> 776</span>  <a class="code" href="group__debug.html#ga924ef2dbda6b733b4041270077c76ece">copyStateFromGPU</a>(mq2);</div>
<div class="line"><a name="l00777"></a><span class="lineno"> 777</span>  </div>
<div class="line"><a name="l00778"></a><span class="lineno"> 778</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=0; i<chunkSize; i++){</div>
<div class="line"><a name="l00779"></a><span class="lineno"> 779</span>  diff = mq1.<a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.real[i] - mq2.<a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.real[i];</div>
<div class="line"><a name="l00780"></a><span class="lineno"> 780</span>  <span class="keywordflow">if</span> (diff<0) diff *= -1;</div>
<div class="line"><a name="l00781"></a><span class="lineno"> 781</span>  <span class="keywordflow">if</span> (diff>precision) <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00782"></a><span class="lineno"> 782</span>  diff = mq1.<a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.imag[i] - mq2.<a class="code" href="structQureg.html#a441e4cacef6bd17adb9813c7442d42fe">stateVec</a>.imag[i];</div>
<div class="line"><a name="l00783"></a><span class="lineno"> 783</span>  <span class="keywordflow">if</span> (diff<0) diff *= -1;</div>
<div class="line"><a name="l00784"></a><span class="lineno"> 784</span>  <span class="keywordflow">if</span> (diff>precision) <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00785"></a><span class="lineno"> 785</span>  }</div>
<div class="line"><a name="l00786"></a><span class="lineno"> 786</span>  <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00787"></a><span class="lineno"> 787</span> }</div>
<div class="line"><a name="l00788"></a><span class="lineno"> 788</span>  </div>
<div class="line"><a name="l00789"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a4d5c3bc20e1fe6f36e1f92e6d030afc7"> 789</a></span> __global__ <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a4d5c3bc20e1fe6f36e1f92e6d030afc7">statevec_compactUnitaryKernel</a> (<a class="code" href="structQureg.html">Qureg</a> qureg, <span class="keywordtype">int</span> rotQubit, <a class="code" href="structComplex.html">Complex</a> alpha, <a class="code" href="structComplex.html">Complex</a> beta){</div>
<div class="line"><a name="l00790"></a><span class="lineno"> 790</span>  <span class="comment">// ----- sizes</span></div>
<div class="line"><a name="l00791"></a><span class="lineno"> 791</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> sizeBlock, <span class="comment">// size of blocks</span></div>
<div class="line"><a name="l00792"></a><span class="lineno"> 792</span>  sizeHalfBlock; <span class="comment">// size of blocks halved</span></div>
<div class="line"><a name="l00793"></a><span class="lineno"> 793</span>  <span class="comment">// ----- indices</span></div>
<div class="line"><a name="l00794"></a><span class="lineno"> 794</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> thisBlock, <span class="comment">// current block</span></div>
<div class="line"><a name="l00795"></a><span class="lineno"> 795</span>  indexUp,indexLo; <span class="comment">// current index and corresponding index in lower half block</span></div>
<div class="line"><a name="l00796"></a><span class="lineno"> 796</span>  </div>
<div class="line"><a name="l00797"></a><span class="lineno"> 797</span>  <span class="comment">// ----- temp variables</span></div>
<div class="line"><a name="l00798"></a><span class="lineno"> 798</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> stateRealUp,stateRealLo, <span class="comment">// storage for previous state values</span></div>
<div class="line"><a name="l00799"></a><span class="lineno"> 799</span>  stateImagUp,stateImagLo; <span class="comment">// (used in updates)</span></div>
<div class="line"><a name="l00800"></a><span class="lineno"> 800</span>  <span class="comment">// ----- temp variables</span></div>
<div class="line"><a name="l00801"></a><span class="lineno"> 801</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> thisTask; <span class="comment">// task based approach for expose loop with small granularity</span></div>
<div class="line"><a name="l00802"></a><span class="lineno"> 802</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> numTasks=qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>>>1;</div>
<div class="line"><a name="l00803"></a><span class="lineno"> 803</span>  </div>
<div class="line"><a name="l00804"></a><span class="lineno"> 804</span>  sizeHalfBlock = 1LL << rotQubit; <span class="comment">// size of blocks halved</span></div>
<div class="line"><a name="l00805"></a><span class="lineno"> 805</span>  sizeBlock = 2LL * sizeHalfBlock; <span class="comment">// size of blocks</span></div>
<div class="line"><a name="l00806"></a><span class="lineno"> 806</span>  </div>
<div class="line"><a name="l00807"></a><span class="lineno"> 807</span>  <span class="comment">// ---------------------------------------------------------------- //</span></div>
<div class="line"><a name="l00808"></a><span class="lineno"> 808</span>  <span class="comment">// rotate //</span></div>
<div class="line"><a name="l00809"></a><span class="lineno"> 809</span>  <span class="comment">// ---------------------------------------------------------------- //</span></div>
<div class="line"><a name="l00810"></a><span class="lineno"> 810</span>  </div>
<div class="line"><a name="l00812"></a><span class="lineno"> 812</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecReal = qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real;</div>
<div class="line"><a name="l00813"></a><span class="lineno"> 813</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecImag = qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag;</div>
<div class="line"><a name="l00814"></a><span class="lineno"> 814</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> alphaImag=alpha.<a class="code" href="structComplex.html#a84f5439aad0ef495efdd3b4c1c02d27e">imag</a>, alphaReal=alpha.<a class="code" href="structComplex.html#ab5b2e2eca02131fc74b289a83636cbe3">real</a>;</div>
<div class="line"><a name="l00815"></a><span class="lineno"> 815</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> betaImag=beta.<a class="code" href="structComplex.html#a84f5439aad0ef495efdd3b4c1c02d27e">imag</a>, betaReal=beta.<a class="code" href="structComplex.html#ab5b2e2eca02131fc74b289a83636cbe3">real</a>;</div>
<div class="line"><a name="l00816"></a><span class="lineno"> 816</span>  </div>
<div class="line"><a name="l00817"></a><span class="lineno"> 817</span>  thisTask = blockIdx.x*blockDim.x + threadIdx.x;</div>
<div class="line"><a name="l00818"></a><span class="lineno"> 818</span>  <span class="keywordflow">if</span> (thisTask>=numTasks) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00819"></a><span class="lineno"> 819</span>  </div>
<div class="line"><a name="l00820"></a><span class="lineno"> 820</span>  thisBlock = thisTask / sizeHalfBlock;</div>
<div class="line"><a name="l00821"></a><span class="lineno"> 821</span>  indexUp = thisBlock*sizeBlock + thisTask%sizeHalfBlock;</div>
<div class="line"><a name="l00822"></a><span class="lineno"> 822</span>  indexLo = indexUp + sizeHalfBlock;</div>
<div class="line"><a name="l00823"></a><span class="lineno"> 823</span>  </div>
<div class="line"><a name="l00824"></a><span class="lineno"> 824</span>  <span class="comment">// store current state vector values in temp variables</span></div>
<div class="line"><a name="l00825"></a><span class="lineno"> 825</span>  stateRealUp = stateVecReal[indexUp];</div>
<div class="line"><a name="l00826"></a><span class="lineno"> 826</span>  stateImagUp = stateVecImag[indexUp];</div>
<div class="line"><a name="l00827"></a><span class="lineno"> 827</span>  </div>
<div class="line"><a name="l00828"></a><span class="lineno"> 828</span>  stateRealLo = stateVecReal[indexLo];</div>
<div class="line"><a name="l00829"></a><span class="lineno"> 829</span>  stateImagLo = stateVecImag[indexLo];</div>
<div class="line"><a name="l00830"></a><span class="lineno"> 830</span>  </div>
<div class="line"><a name="l00831"></a><span class="lineno"> 831</span>  <span class="comment">// state[indexUp] = alpha * state[indexUp] - conj(beta) * state[indexLo]</span></div>
<div class="line"><a name="l00832"></a><span class="lineno"> 832</span>  stateVecReal[indexUp] = alphaReal*stateRealUp - alphaImag*stateImagUp </div>
<div class="line"><a name="l00833"></a><span class="lineno"> 833</span>  - betaReal*stateRealLo - betaImag*stateImagLo;</div>
<div class="line"><a name="l00834"></a><span class="lineno"> 834</span>  stateVecImag[indexUp] = alphaReal*stateImagUp + alphaImag*stateRealUp </div>
<div class="line"><a name="l00835"></a><span class="lineno"> 835</span>  - betaReal*stateImagLo + betaImag*stateRealLo;</div>
<div class="line"><a name="l00836"></a><span class="lineno"> 836</span>  </div>
<div class="line"><a name="l00837"></a><span class="lineno"> 837</span>  <span class="comment">// state[indexLo] = beta * state[indexUp] + conj(alpha) * state[indexLo]</span></div>
<div class="line"><a name="l00838"></a><span class="lineno"> 838</span>  stateVecReal[indexLo] = betaReal*stateRealUp - betaImag*stateImagUp </div>
<div class="line"><a name="l00839"></a><span class="lineno"> 839</span>  + alphaReal*stateRealLo + alphaImag*stateImagLo;</div>
<div class="line"><a name="l00840"></a><span class="lineno"> 840</span>  stateVecImag[indexLo] = betaReal*stateImagUp + betaImag*stateRealUp </div>
<div class="line"><a name="l00841"></a><span class="lineno"> 841</span>  + alphaReal*stateImagLo - alphaImag*stateRealLo;</div>
<div class="line"><a name="l00842"></a><span class="lineno"> 842</span> }</div>
<div class="line"><a name="l00843"></a><span class="lineno"> 843</span>  </div>
<div class="line"><a name="l00844"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#aec63559e8b9ab0e17efe18d64d2ceca6"> 844</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#aec63559e8b9ab0e17efe18d64d2ceca6">statevec_compactUnitary</a>(<a class="code" href="structQureg.html">Qureg</a> qureg, <span class="keywordtype">int</span> targetQubit, <a class="code" href="structComplex.html">Complex</a> alpha, <a class="code" href="structComplex.html">Complex</a> beta) </div>
<div class="line"><a name="l00845"></a><span class="lineno"> 845</span> {</div>
<div class="line"><a name="l00846"></a><span class="lineno"> 846</span>  <span class="keywordtype">int</span> threadsPerCUDABlock, CUDABlocks;</div>
<div class="line"><a name="l00847"></a><span class="lineno"> 847</span>  threadsPerCUDABlock = 128;</div>
<div class="line"><a name="l00848"></a><span class="lineno"> 848</span>  CUDABlocks = ceil((<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>)(qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>>>1)/threadsPerCUDABlock);</div>
<div class="line"><a name="l00849"></a><span class="lineno"> 849</span>  statevec_compactUnitaryKernel<<<CUDABlocks, threadsPerCUDABlock>>>(qureg, targetQubit, alpha, beta);</div>
<div class="line"><a name="l00850"></a><span class="lineno"> 850</span> }</div>
<div class="line"><a name="l00851"></a><span class="lineno"> 851</span>  </div>
<div class="line"><a name="l00852"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#ab1bc0bf471c4459dd845adbfac5ef857"> 852</a></span> __global__ <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#ab1bc0bf471c4459dd845adbfac5ef857">statevec_controlledCompactUnitaryKernel</a> (<a class="code" href="structQureg.html">Qureg</a> qureg, <span class="keywordtype">int</span> controlQubit, <span class="keywordtype">int</span> targetQubit, <a class="code" href="structComplex.html">Complex</a> alpha, <a class="code" href="structComplex.html">Complex</a> beta){</div>
<div class="line"><a name="l00853"></a><span class="lineno"> 853</span>  <span class="comment">// ----- sizes</span></div>
<div class="line"><a name="l00854"></a><span class="lineno"> 854</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> sizeBlock, <span class="comment">// size of blocks</span></div>
<div class="line"><a name="l00855"></a><span class="lineno"> 855</span>  sizeHalfBlock; <span class="comment">// size of blocks halved</span></div>
<div class="line"><a name="l00856"></a><span class="lineno"> 856</span>  <span class="comment">// ----- indices</span></div>
<div class="line"><a name="l00857"></a><span class="lineno"> 857</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> thisBlock, <span class="comment">// current block</span></div>
<div class="line"><a name="l00858"></a><span class="lineno"> 858</span>  indexUp,indexLo; <span class="comment">// current index and corresponding index in lower half block</span></div>
<div class="line"><a name="l00859"></a><span class="lineno"> 859</span>  </div>
<div class="line"><a name="l00860"></a><span class="lineno"> 860</span>  <span class="comment">// ----- temp variables</span></div>
<div class="line"><a name="l00861"></a><span class="lineno"> 861</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> stateRealUp,stateRealLo, <span class="comment">// storage for previous state values</span></div>
<div class="line"><a name="l00862"></a><span class="lineno"> 862</span>  stateImagUp,stateImagLo; <span class="comment">// (used in updates)</span></div>
<div class="line"><a name="l00863"></a><span class="lineno"> 863</span>  <span class="comment">// ----- temp variables</span></div>
<div class="line"><a name="l00864"></a><span class="lineno"> 864</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> thisTask; <span class="comment">// task based approach for expose loop with small granularity</span></div>
<div class="line"><a name="l00865"></a><span class="lineno"> 865</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> numTasks=qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>>>1;</div>
<div class="line"><a name="l00866"></a><span class="lineno"> 866</span>  <span class="keywordtype">int</span> controlBit;</div>
<div class="line"><a name="l00867"></a><span class="lineno"> 867</span>  </div>
<div class="line"><a name="l00868"></a><span class="lineno"> 868</span>  sizeHalfBlock = 1LL << targetQubit; <span class="comment">// size of blocks halved</span></div>
<div class="line"><a name="l00869"></a><span class="lineno"> 869</span>  sizeBlock = 2LL * sizeHalfBlock; <span class="comment">// size of blocks</span></div>
<div class="line"><a name="l00870"></a><span class="lineno"> 870</span>  </div>
<div class="line"><a name="l00871"></a><span class="lineno"> 871</span>  <span class="comment">// ---------------------------------------------------------------- //</span></div>
<div class="line"><a name="l00872"></a><span class="lineno"> 872</span>  <span class="comment">// rotate //</span></div>
<div class="line"><a name="l00873"></a><span class="lineno"> 873</span>  <span class="comment">// ---------------------------------------------------------------- //</span></div>
<div class="line"><a name="l00874"></a><span class="lineno"> 874</span>  </div>
<div class="line"><a name="l00876"></a><span class="lineno"> 876</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecReal = qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real;</div>
<div class="line"><a name="l00877"></a><span class="lineno"> 877</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecImag = qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag;</div>
<div class="line"><a name="l00878"></a><span class="lineno"> 878</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> alphaImag=alpha.<a class="code" href="structComplex.html#a84f5439aad0ef495efdd3b4c1c02d27e">imag</a>, alphaReal=alpha.<a class="code" href="structComplex.html#ab5b2e2eca02131fc74b289a83636cbe3">real</a>;</div>
<div class="line"><a name="l00879"></a><span class="lineno"> 879</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> betaImag=beta.<a class="code" href="structComplex.html#a84f5439aad0ef495efdd3b4c1c02d27e">imag</a>, betaReal=beta.<a class="code" href="structComplex.html#ab5b2e2eca02131fc74b289a83636cbe3">real</a>;</div>
<div class="line"><a name="l00880"></a><span class="lineno"> 880</span>  </div>
<div class="line"><a name="l00881"></a><span class="lineno"> 881</span>  thisTask = blockIdx.x*blockDim.x + threadIdx.x;</div>
<div class="line"><a name="l00882"></a><span class="lineno"> 882</span>  <span class="keywordflow">if</span> (thisTask>=numTasks) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00883"></a><span class="lineno"> 883</span>  </div>
<div class="line"><a name="l00884"></a><span class="lineno"> 884</span>  thisBlock = thisTask / sizeHalfBlock;</div>
<div class="line"><a name="l00885"></a><span class="lineno"> 885</span>  indexUp = thisBlock*sizeBlock + thisTask%sizeHalfBlock;</div>
<div class="line"><a name="l00886"></a><span class="lineno"> 886</span>  indexLo = indexUp + sizeHalfBlock;</div>
<div class="line"><a name="l00887"></a><span class="lineno"> 887</span>  </div>
<div class="line"><a name="l00888"></a><span class="lineno"> 888</span>  controlBit = <a class="code" href="QuEST__gpu_8cu.html#aec1852e1a8e70d3690919ce8ab551ba0">extractBit</a>(controlQubit, indexUp);</div>
<div class="line"><a name="l00889"></a><span class="lineno"> 889</span>  <span class="keywordflow">if</span> (controlBit){</div>
<div class="line"><a name="l00890"></a><span class="lineno"> 890</span>  <span class="comment">// store current state vector values in temp variables</span></div>
<div class="line"><a name="l00891"></a><span class="lineno"> 891</span>  stateRealUp = stateVecReal[indexUp];</div>
<div class="line"><a name="l00892"></a><span class="lineno"> 892</span>  stateImagUp = stateVecImag[indexUp];</div>
<div class="line"><a name="l00893"></a><span class="lineno"> 893</span>  </div>
<div class="line"><a name="l00894"></a><span class="lineno"> 894</span>  stateRealLo = stateVecReal[indexLo];</div>
<div class="line"><a name="l00895"></a><span class="lineno"> 895</span>  stateImagLo = stateVecImag[indexLo];</div>
<div class="line"><a name="l00896"></a><span class="lineno"> 896</span>  </div>
<div class="line"><a name="l00897"></a><span class="lineno"> 897</span>  <span class="comment">// state[indexUp] = alpha * state[indexUp] - conj(beta) * state[indexLo]</span></div>
<div class="line"><a name="l00898"></a><span class="lineno"> 898</span>  stateVecReal[indexUp] = alphaReal*stateRealUp - alphaImag*stateImagUp </div>
<div class="line"><a name="l00899"></a><span class="lineno"> 899</span>  - betaReal*stateRealLo - betaImag*stateImagLo;</div>
<div class="line"><a name="l00900"></a><span class="lineno"> 900</span>  stateVecImag[indexUp] = alphaReal*stateImagUp + alphaImag*stateRealUp </div>
<div class="line"><a name="l00901"></a><span class="lineno"> 901</span>  - betaReal*stateImagLo + betaImag*stateRealLo;</div>
<div class="line"><a name="l00902"></a><span class="lineno"> 902</span>  </div>
<div class="line"><a name="l00903"></a><span class="lineno"> 903</span>  <span class="comment">// state[indexLo] = beta * state[indexUp] + conj(alpha) * state[indexLo]</span></div>
<div class="line"><a name="l00904"></a><span class="lineno"> 904</span>  stateVecReal[indexLo] = betaReal*stateRealUp - betaImag*stateImagUp </div>
<div class="line"><a name="l00905"></a><span class="lineno"> 905</span>  + alphaReal*stateRealLo + alphaImag*stateImagLo;</div>
<div class="line"><a name="l00906"></a><span class="lineno"> 906</span>  stateVecImag[indexLo] = betaReal*stateImagUp + betaImag*stateRealUp </div>
<div class="line"><a name="l00907"></a><span class="lineno"> 907</span>  + alphaReal*stateImagLo - alphaImag*stateRealLo;</div>
<div class="line"><a name="l00908"></a><span class="lineno"> 908</span>  }</div>
<div class="line"><a name="l00909"></a><span class="lineno"> 909</span> }</div>
<div class="line"><a name="l00910"></a><span class="lineno"> 910</span>  </div>
<div class="line"><a name="l00911"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a1275d604674224d87a173fb5bac78835"> 911</a></span> <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a1275d604674224d87a173fb5bac78835">statevec_controlledCompactUnitary</a>(<a class="code" href="structQureg.html">Qureg</a> qureg, <span class="keywordtype">int</span> controlQubit, <span class="keywordtype">int</span> targetQubit, <a class="code" href="structComplex.html">Complex</a> alpha, <a class="code" href="structComplex.html">Complex</a> beta) </div>
<div class="line"><a name="l00912"></a><span class="lineno"> 912</span> {</div>
<div class="line"><a name="l00913"></a><span class="lineno"> 913</span>  <span class="keywordtype">int</span> threadsPerCUDABlock, CUDABlocks;</div>
<div class="line"><a name="l00914"></a><span class="lineno"> 914</span>  threadsPerCUDABlock = 128;</div>
<div class="line"><a name="l00915"></a><span class="lineno"> 915</span>  CUDABlocks = ceil((<a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>)(qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>>>1)/threadsPerCUDABlock);</div>
<div class="line"><a name="l00916"></a><span class="lineno"> 916</span>  statevec_controlledCompactUnitaryKernel<<<CUDABlocks, threadsPerCUDABlock>>>(qureg, controlQubit, targetQubit, alpha, beta);</div>
<div class="line"><a name="l00917"></a><span class="lineno"> 917</span> }</div>
<div class="line"><a name="l00918"></a><span class="lineno"> 918</span>  </div>
<div class="line"><a name="l00919"></a><span class="lineno"><a class="line" href="QuEST__gpu_8cu.html#a19e364fb77ebe56afd7cd7cc6de12449"> 919</a></span> __global__ <span class="keywordtype">void</span> <a class="code" href="QuEST__gpu_8cu.html#a19e364fb77ebe56afd7cd7cc6de12449">statevec_unitaryKernel</a>(<a class="code" href="structQureg.html">Qureg</a> qureg, <span class="keywordtype">int</span> targetQubit, ArgMatrix2 u){</div>
<div class="line"><a name="l00920"></a><span class="lineno"> 920</span>  <span class="comment">// ----- sizes</span></div>
<div class="line"><a name="l00921"></a><span class="lineno"> 921</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> sizeBlock, <span class="comment">// size of blocks</span></div>
<div class="line"><a name="l00922"></a><span class="lineno"> 922</span>  sizeHalfBlock; <span class="comment">// size of blocks halved</span></div>
<div class="line"><a name="l00923"></a><span class="lineno"> 923</span>  <span class="comment">// ----- indices</span></div>
<div class="line"><a name="l00924"></a><span class="lineno"> 924</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> thisBlock, <span class="comment">// current block</span></div>
<div class="line"><a name="l00925"></a><span class="lineno"> 925</span>  indexUp,indexLo; <span class="comment">// current index and corresponding index in lower half block</span></div>
<div class="line"><a name="l00926"></a><span class="lineno"> 926</span>  </div>
<div class="line"><a name="l00927"></a><span class="lineno"> 927</span>  <span class="comment">// ----- temp variables</span></div>
<div class="line"><a name="l00928"></a><span class="lineno"> 928</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> stateRealUp,stateRealLo, <span class="comment">// storage for previous state values</span></div>
<div class="line"><a name="l00929"></a><span class="lineno"> 929</span>  stateImagUp,stateImagLo; <span class="comment">// (used in updates)</span></div>
<div class="line"><a name="l00930"></a><span class="lineno"> 930</span>  <span class="comment">// ----- temp variables</span></div>
<div class="line"><a name="l00931"></a><span class="lineno"> 931</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> thisTask; <span class="comment">// task based approach for expose loop with small granularity</span></div>
<div class="line"><a name="l00932"></a><span class="lineno"> 932</span>  <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> numTasks=qureg.<a class="code" href="structQureg.html#ab0ea0358482b62f43fdd781469607d97">numAmpsPerChunk</a>>>1;</div>
<div class="line"><a name="l00933"></a><span class="lineno"> 933</span>  </div>
<div class="line"><a name="l00934"></a><span class="lineno"> 934</span>  sizeHalfBlock = 1LL << targetQubit; <span class="comment">// size of blocks halved</span></div>
<div class="line"><a name="l00935"></a><span class="lineno"> 935</span>  sizeBlock = 2LL * sizeHalfBlock; <span class="comment">// size of blocks</span></div>
<div class="line"><a name="l00936"></a><span class="lineno"> 936</span>  </div>
<div class="line"><a name="l00937"></a><span class="lineno"> 937</span>  <span class="comment">// ---------------------------------------------------------------- //</span></div>
<div class="line"><a name="l00938"></a><span class="lineno"> 938</span>  <span class="comment">// rotate //</span></div>
<div class="line"><a name="l00939"></a><span class="lineno"> 939</span>  <span class="comment">// ---------------------------------------------------------------- //</span></div>
<div class="line"><a name="l00940"></a><span class="lineno"> 940</span>  </div>
<div class="line"><a name="l00942"></a><span class="lineno"> 942</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecReal = qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.real;</div>
<div class="line"><a name="l00943"></a><span class="lineno"> 943</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *stateVecImag = qureg.<a class="code" href="structQureg.html#ac181d7b3b94fff179dc74d7935ecd9e1">deviceStateVec</a>.imag;</div>
<div class="line"><a name="l00944"></a><span class="lineno"> 944</span>  </div>
<div class="line"><a name="l00945"></a><span class="lineno"> 945</span>  thisTask = blockIdx.x*blockDim.x + threadIdx.x;</div>
<div class="line"><a name="l00946"></a><span class="lineno"> 946</span>  <span class="keywordflow">if</span> (thisTask>=numTasks) <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00947"></a><span class="lineno"> 947</span>  </div>
<div class="line"><a name="l00948"></a><span class="lineno"> 948</span>  thisBlock = thisTask / sizeHalfBlock;</div>
<div class="line"><a name="l00949"></a><span class="lineno"> 949</span>  indexUp = thisBlock*sizeBlock + thisTask%sizeHalfBlock;</div>
<div class="line"><a name="l00950"></a><span class="lineno"> 950</span>  indexLo = indexUp + sizeHalfBlock;</div>
<div class="line"><a name="l00951"></a><span class="lineno"> 951</span>  </div>
<div class="line"><a name="l00952"></a><span class="lineno"> 952</span>  <span class="comment">// store current state vector values in temp variables</span></div>
<div class="line"><a name="l00953"></a><span class="lineno"> 953</span>  stateRealUp = stateVecReal[indexUp];</div>
<div class="line"><a name="l00954"></a><span class="lineno"> 954</span>  stateImagUp = stateVecImag[indexUp];</div>
<div class="line"><a name="l00955"></a><span class="lineno"> 955</span>  </div>
<div class="line"><a name="l00956"></a><span class="lineno"> 956</span>  stateRealLo = stateVecReal[indexLo];</div>