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<div id="projectbrief">Aaru Data Preservation Suite - Format Library</div>
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<a href="crc64__vmull_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">/*</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment"> * This file is part of the Aaru Data Preservation Suite.</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment"> * Copyright (c) 2019-2025 Natalia Portillo.</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment"> *</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment"> * This library is free software; you can redistribute it and/or modify</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment"> * it under the terms of the GNU Lesser General Public License as</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment"> * published by the Free Software Foundation; either version 2.1 of the</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="comment"> * License, or (at your option) any later version.</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="comment"> *</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="comment"> * This library is distributed in the hope that it will be useful, but</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="comment"> * Lesser General Public License for more details.</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="comment"> *</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="comment"> * You should have received a copy of the GNU Lesser General Public</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="comment"> * License along with this library; if not, see &lt;http://www.gnu.org/licenses/&gt;.</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="comment"> */</span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> </div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="preprocessor">#if defined(__aarch64__) || defined(_M_ARM64) || defined(__arm__) || defined(_M_ARM)</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> </div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="preprocessor">#include &lt;arm_neon.h&gt;</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="preprocessor">#include &lt;stddef.h&gt;</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="preprocessor">#include &lt;stdint.h&gt;</span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> </div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span><span class="preprocessor">#include &lt;<a class="code" href="aaruformat_8h.html">aaruformat.h</a>&gt;</span></div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> </div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span><span class="preprocessor">#include &quot;<a class="code" href="arm__vmull_8h.html">arm_vmull.h</a>&quot;</span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="preprocessor">#include &quot;<a class="code" href="log_8h.html">log.h</a>&quot;</span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> </div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span><span class="keyword">static</span> <span class="keyword">const</span> uint8_t shuffleMasks[] = {</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> 0x8f, 0x8e, 0x8d, 0x8c, 0x8b, 0x8a, 0x89, 0x88, 0x87, 0x86, 0x85, 0x84, 0x83, 0x82, 0x81, 0x80,</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span>};</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> </div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span>TARGET_WITH_SIMD <a class="code hl_define" href="decls_8h.html#ac032d233a8ebfcd82fd49d0824eefb18">FORCE_INLINE</a> <span class="keywordtype">void</span> shiftRight128(uint64x2_t in, <span class="keywordtype">size_t</span> n, uint64x2_t *outLeft, uint64x2_t *outRight)</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span>{</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">const</span> uint64x2_t maskA =</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> vreinterpretq_u64_u32(vld1q_u32((<span class="keyword">const</span> uint32_t *)(<span class="keyword">const</span> uint64x2_t *)(shuffleMasks + (16 - n))));</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> uint64x2_t b = vreinterpretq_u64_u8(vceqq_u8(vreinterpretq_u8_u64(vreinterpretq_u64_u32(vdupq_n_u32(0))),</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> vreinterpretq_u8_u64(vreinterpretq_u64_u32(vdupq_n_u32(0)))));</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> <span class="keyword">const</span> uint64x2_t maskB = vreinterpretq_u64_u32(veorq_u32(vreinterpretq_u32_u64(maskA), vreinterpretq_u32_u64(b)));</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> </div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> *outLeft = mm_shuffle_epi8(in, maskB);</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> *outRight = mm_shuffle_epi8(in, maskA);</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span>}</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> </div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span>TARGET_WITH_SIMD <a class="code hl_define" href="decls_8h.html#ac032d233a8ebfcd82fd49d0824eefb18">FORCE_INLINE</a> uint64x2_t fold(uint64x2_t in, uint64x2_t foldConstants)</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span>{</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> <span class="keywordflow">return</span> veorq_u64(sse2neon_vmull_p64(vget_low_u64(in), vget_low_u64(foldConstants)),</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> sse2neon_vmull_p64(vget_high_u64(in), vget_high_u64(foldConstants)));</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span>}</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span></div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span><a class="code hl_define" href="decls_8h.html#a9001412c35f3c92d3a9320d27b0d97f9">AARU_EXPORT</a> TARGET_WITH_SIMD uint64_t <a class="code hl_define" href="decls_8h.html#a018e0da1c1f7e4f6187a982c0e40e056">AARU_CALL</a> aaruf_crc64_vmull(uint64_t previous_crc, <span class="keyword">const</span> uint8_t *data, <span class="keywordtype">long</span> len)</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span>{</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> <a class="code hl_define" href="log_8h.html#a21cc0459b78d5f2d7bd737e5aae1278a">TRACE</a>(<span class="stringliteral">&quot;Entering aaruf_crc64_vmull(%llu, %p, %ld)&quot;</span>, previous_crc, data, len);</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> </div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> <span class="keyword">const</span> uint64_t k1 = 0xe05dd497ca393ae4; <span class="comment">// bitReflect(expMod65(128 + 64, poly, 1)) &lt;&lt; 1;</span></div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keyword">const</span> uint64_t k2 = 0xdabe95afc7875f40; <span class="comment">// bitReflect(expMod65(128, poly, 1)) &lt;&lt; 1;</span></div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <span class="keyword">const</span> uint64_t mu = 0x9c3e466c172963d5; <span class="comment">// (bitReflect(div129by65(poly)) &lt;&lt; 1) | 1;</span></div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="keyword">const</span> uint64_t p = 0x92d8af2baf0e1e85; <span class="comment">// (bitReflect(poly) &lt;&lt; 1) | 1;</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> </div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> <span class="keyword">const</span> uint64x2_t foldConstants1 = vcombine_u64(vcreate_u64(k1), vcreate_u64(k2));</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> <span class="keyword">const</span> uint64x2_t foldConstants2 = vcombine_u64(vcreate_u64(mu), vcreate_u64(p));</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> </div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="keyword">const</span> uint8_t *end = data + len;</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> </div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> <span class="comment">// Align pointers</span></div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> <span class="keyword">const</span> uint64x2_t *alignedData = (<span class="keyword">const</span> uint64x2_t *)((uintptr_t)data &amp; ~(uintptr_t)15);</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <span class="keyword">const</span> uint64x2_t *alignedEnd = (<span class="keyword">const</span> uint64x2_t *)(((uintptr_t)end + 15) &amp; ~(uintptr_t)15);</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> </div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> <span class="keyword">const</span> <span class="keywordtype">size_t</span> leadInSize = data - (<span class="keyword">const</span> uint8_t *)alignedData;</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> <span class="keyword">const</span> <span class="keywordtype">size_t</span> leadOutSize = (<span class="keyword">const</span> uint8_t *)alignedEnd - end;</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> </div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> <span class="keyword">const</span> <span class="keywordtype">size_t</span> alignedLength = alignedEnd - alignedData;</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> </div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> <span class="keyword">const</span> uint64x2_t leadInMask =</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> vreinterpretq_u64_u32(vld1q_u32((<span class="keyword">const</span> uint32_t *)(<span class="keyword">const</span> uint64x2_t *)(shuffleMasks + (16 - leadInSize))));</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> uint64x2_t a = vreinterpretq_u64_u32(vdupq_n_u32(0));</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> uint64x2_t b = vreinterpretq_u64_u32(</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> vld1q_u32((<span class="keyword">const</span> uint32_t *)alignedData)); <span class="comment">// Use a signed shift right to create a mask with the sign bit</span></div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> <span class="keyword">const</span> uint64x2_t data0 =</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> vreinterpretq_u64_u8(vbslq_u8(vreinterpretq_u8_s8(vshrq_n_s8(vreinterpretq_s8_u64(leadInMask), 7)),</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> vreinterpretq_u8_u64(b), vreinterpretq_u8_u64(a)));</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> </div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> <span class="keyword">const</span> uint64x2_t initialCrc = vsetq_lane_u64(~previous_crc, vdupq_n_u64(0), 0);</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> </div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> uint64x2_t R;</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> <span class="keywordflow">if</span>(alignedLength == 1)</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> {</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> <span class="comment">// Single data block, initial CRC possibly bleeds into zero padding</span></div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> uint64x2_t crc0, crc1;</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> shiftRight128(initialCrc, 16 - len, &amp;crc0, &amp;crc1);</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> </div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> uint64x2_t A, B;</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> shiftRight128(data0, leadOutSize, &amp;A, &amp;B);</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> </div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> <span class="keyword">const</span> uint64x2_t P = veorq_u64(A, crc0);</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> R = veorq_u64(sse2neon_vmull_p64(vget_low_u64(P), vget_high_u64(foldConstants1)),</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> veorq_u64(mm_srli_si128(P, 8), mm_slli_si128(crc1, 8)));</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> }</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span>(alignedLength == 2)</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> {</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> <span class="keyword">const</span> uint64x2_t data1 = vreinterpretq_u64_u32(vld1q_u32((<span class="keyword">const</span> uint32_t *)(alignedData + 1)));</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> </div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> <span class="keywordflow">if</span>(len &lt; 8)</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> {</div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> <span class="comment">// Initial CRC bleeds into the zero padding</span></div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> uint64x2_t crc0, crc1;</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> shiftRight128(initialCrc, 16 - len, &amp;crc0, &amp;crc1);</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> </div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> uint64x2_t A, B, C, D;</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> shiftRight128(data0, leadOutSize, &amp;A, &amp;B);</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> shiftRight128(data1, leadOutSize, &amp;C, &amp;D);</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> </div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> <span class="keyword">const</span> uint64x2_t P = veorq_u64(veorq_u64(B, C), crc0);</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> R = veorq_u64(sse2neon_vmull_p64(vget_low_u64(P), vget_high_u64(foldConstants1)),</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> veorq_u64(mm_srli_si128(P, 8), mm_slli_si128(crc1, 8)));</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> }</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> {</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> <span class="comment">// We can fit the initial CRC into the data without bleeding into the zero padding</span></div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> uint64x2_t crc0, crc1;</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> shiftRight128(initialCrc, leadInSize, &amp;crc0, &amp;crc1);</div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> </div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> uint64x2_t A, B, C, D;</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> shiftRight128(veorq_u64(data0, crc0), leadOutSize, &amp;A, &amp;B);</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> shiftRight128(veorq_u64(data1, crc1), leadOutSize, &amp;C, &amp;D);</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> </div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> <span class="keyword">const</span> uint64x2_t P = veorq_u64(fold(A, foldConstants1), veorq_u64(B, C));</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> R = veorq_u64(sse2neon_vmull_p64(vget_low_u64(P), vget_high_u64(foldConstants1)), mm_srli_si128(P, 8));</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> }</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> }</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> {</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> alignedData++;</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> len -= 16 - leadInSize;</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> </div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> <span class="comment">// Initial CRC can simply be added to data</span></div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> uint64x2_t crc0, crc1;</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> shiftRight128(initialCrc, leadInSize, &amp;crc0, &amp;crc1);</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> </div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span> uint64x2_t accumulator = veorq_u64(fold(veorq_u64(crc0, data0), foldConstants1), crc1);</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> </div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> <span class="keywordflow">while</span>(len &gt;= 32)</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span> {</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> accumulator = fold(veorq_u64(vreinterpretq_u64_u32(vld1q_u32((<span class="keyword">const</span> uint32_t *)alignedData)), accumulator),</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> foldConstants1);</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> </div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> len -= 16;</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> alignedData++;</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span> }</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> </div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span> uint64x2_t P;</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span> <span class="keywordflow">if</span>(len == 16)</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> P = veorq_u64(accumulator, vreinterpretq_u64_u32(vld1q_u32((<span class="keyword">const</span> uint32_t *)alignedData)));</div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span> {</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span> <span class="keyword">const</span> uint64x2_t end0 =</div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> veorq_u64(accumulator, vreinterpretq_u64_u32(vld1q_u32((<span class="keyword">const</span> uint32_t *)alignedData)));</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span> <span class="keyword">const</span> uint64x2_t end1 = vreinterpretq_u64_u32(vld1q_u32((<span class="keyword">const</span> uint32_t *)(alignedData + 1)));</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span> </div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span> uint64x2_t A, B, C, D;</div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span> shiftRight128(end0, leadOutSize, &amp;A, &amp;B);</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> shiftRight128(end1, leadOutSize, &amp;C, &amp;D);</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> </div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span> P = veorq_u64(fold(A, foldConstants1),</div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> vreinterpretq_u64_u32(vorrq_u32(vreinterpretq_u32_u64(B), vreinterpretq_u32_u64(C))));</div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span> }</div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span> </div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> R = veorq_u64(sse2neon_vmull_p64(vget_low_u64(P), vget_high_u64(foldConstants1)), mm_srli_si128(P, 8));</div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span> }</div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span> </div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span> <span class="comment">// Final Barrett reduction</span></div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span> <span class="keyword">const</span> uint64x2_t T1 = sse2neon_vmull_p64(vget_low_u64(R), vget_low_u64(foldConstants2));</div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span> <span class="keyword">const</span> uint64x2_t T2 = veorq_u64(</div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span> veorq_u64(sse2neon_vmull_p64(vget_low_u64(T1), vget_high_u64(foldConstants2)), mm_slli_si128(T1, 8)), R);</div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span> </div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span> <a class="code hl_define" href="log_8h.html#a21cc0459b78d5f2d7bd737e5aae1278a">TRACE</a>(<span class="stringliteral">&quot;Exiting aaruf_crc64_vmull()&quot;</span>);</div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno"> 187</span> </div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"> 188</span> <span class="keywordflow">return</span> ~vgetq_lane_u64(T2, 1);</div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span>}</div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span> </div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span><span class="preprocessor">#endif</span></div>
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