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<a href="backend_2common_2utils_8h.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">// Copyright © 2023-2024 Apple Inc.</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span> </div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="preprocessor">#pragma once</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span> </div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="preprocessor">#include &lt;vector&gt;</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span> </div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="preprocessor">#include &quot;<a class="code" href="array_8h.html">mlx/array.h</a>&quot;</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span> </div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespacemlx_1_1core.html">mlx::core</a> {</div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span> </div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> Str<span class="keywordtype">id</span>eT&gt;</div>
<div class="foldopen" id="foldopen00012" data-start="{" data-end="}">
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core.html#a77657cb50fd9392f7f4c64e43843c2b3"> 12</a></span><span class="keyword">inline</span> StrideT <a class="code hl_function" href="namespacemlx_1_1core.html#a77657cb50fd9392f7f4c64e43843c2b3">elem_to_loc</a>(</div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span> <span class="keywordtype">int</span> elem,</div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span> <span class="keyword">const</span> std::vector&lt;int&gt;&amp; shape,</div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span> <span class="keyword">const</span> std::vector&lt;StrideT&gt;&amp; strides) {</div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> StrideT loc = 0;</div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = shape.size() - 1; i &gt;= 0; --i) {</div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">auto</span> q_and_r = ldiv(elem, shape[i]);</div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> loc += q_and_r.rem * strides[i];</div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> elem = q_and_r.quot;</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> }</div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> <span class="keywordflow">return</span> loc;</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span>}</div>
</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> </div>
<div class="foldopen" id="foldopen00025" data-start="{" data-end="}">
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core.html#ad7e4f40eb351b554bbfabb6d7d600d06"> 25</a></span><span class="keyword">inline</span> <span class="keywordtype">size_t</span> <a class="code hl_function" href="namespacemlx_1_1core.html#a77657cb50fd9392f7f4c64e43843c2b3">elem_to_loc</a>(<span class="keywordtype">int</span> elem, <span class="keyword">const</span> <a class="code hl_class" href="classmlx_1_1core_1_1array.html">array</a>&amp; a) {</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> <span class="keywordflow">if</span> (a.<a class="code hl_function" href="classmlx_1_1core_1_1array.html#a0a20a6065ae71b64c1e3aa22a45fd8a1">flags</a>().<a class="code hl_variable" href="structmlx_1_1core_1_1array_1_1_flags.html#a3170fa381dc7a90f6eabcc029bdf9bfd">row_contiguous</a>) {</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> <span class="keywordflow">return</span> elem;</div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> }</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> <span class="keywordflow">return</span> <a class="code hl_function" href="namespacemlx_1_1core.html#a77657cb50fd9392f7f4c64e43843c2b3">elem_to_loc</a>(elem, a.<a class="code hl_function" href="classmlx_1_1core_1_1array.html#a4a2a2c8a4a5beafd723fc13f2055d55d">shape</a>(), a.<a class="code hl_function" href="classmlx_1_1core_1_1array.html#a186cf2648da92584d5c1c8b24e69629b">strides</a>());</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span>}</div>
</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> </div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> Str<span class="keywordtype">id</span>eT&gt;</div>
<div class="foldopen" id="foldopen00033" data-start="{" data-end="}">
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core.html#a085379297e21d57f5b3aa38ae1c26070"> 33</a></span>std::vector&lt;StrideT&gt; <a class="code hl_function" href="namespacemlx_1_1core.html#a085379297e21d57f5b3aa38ae1c26070">make_contiguous_strides</a>(<span class="keyword">const</span> std::vector&lt;int&gt;&amp; shape) {</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> std::vector&lt;StrideT&gt; strides(shape.size(), 1);</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = shape.size() - 1; i &gt; 0; i--) {</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> strides[i - 1] = strides[i] * shape[i];</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> }</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> <span class="keywordflow">return</span> strides;</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span>}</div>
</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> </div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span><span class="comment">// Collapse dims that are contiguous to possibly route to a better kernel</span></div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span><span class="comment">// e.g. for x = transpose(array({0, 1, 2, 3, 4, 5, 6, 7}, {2, 2, 2}), {2, 0, 1})</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span><span class="comment">// should return {{2, 4}, {{1, 2}}}.</span></div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span><span class="comment">//</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span><span class="comment">// When multiple arrays are passed they should all have the same shape. The</span></div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span><span class="comment">// collapsed axes are also the same so one shape is returned.</span></div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span>std::tuple&lt;std::vector&lt;int&gt;, std::vector&lt;std::vector&lt;int64_t&gt;&gt;&gt;</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core.html#a38fe6ec5220d13d96c7dad7556d2b613"> 48</a></span><a class="code hl_function" href="namespacemlx_1_1core.html#a38fe6ec5220d13d96c7dad7556d2b613">collapse_contiguous_dims</a>(</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> <span class="keyword">const</span> std::vector&lt;int&gt;&amp; shape,</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <span class="keyword">const</span> std::vector&lt;std::vector&lt;int64_t&gt;&gt;&amp; strides,</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> int64_t size_cap = std::numeric_limits&lt;int32_t&gt;::max());</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span>std::tuple&lt;std::vector&lt;int&gt;, std::vector&lt;std::vector&lt;size_t&gt;&gt;&gt;</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core.html#af2895f9b0083efd8221275eb8cadccbe"> 53</a></span><a class="code hl_function" href="namespacemlx_1_1core.html#a38fe6ec5220d13d96c7dad7556d2b613">collapse_contiguous_dims</a>(</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> <span class="keyword">const</span> std::vector&lt;int&gt;&amp; shape,</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> <span class="keyword">const</span> std::vector&lt;std::vector&lt;size_t&gt;&gt;&amp; strides,</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> <span class="keywordtype">size_t</span> size_cap = std::numeric_limits&lt;int32_t&gt;::max());</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> </div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span><span class="keyword">inline</span> std::tuple&lt;std::vector&lt;int&gt;, std::vector&lt;std::vector&lt;size_t&gt;&gt;&gt;</div>
<div class="foldopen" id="foldopen00059" data-start="{" data-end="}">
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core.html#a90e2b6edc0fe82230cb93f5ea39febb4"> 59</a></span><a class="code hl_function" href="namespacemlx_1_1core.html#a38fe6ec5220d13d96c7dad7556d2b613">collapse_contiguous_dims</a>(</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <span class="keyword">const</span> std::vector&lt;array&gt;&amp; xs,</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> <span class="keywordtype">size_t</span> size_cap = std::numeric_limits&lt;int32_t&gt;::max()) {</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> std::vector&lt;std::vector&lt;size_t&gt;&gt; strides;</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> <span class="keywordflow">for</span> (<span class="keyword">auto</span>&amp; x : xs) {</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> strides.emplace_back(x.strides());</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> }</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keywordflow">return</span> <a class="code hl_function" href="namespacemlx_1_1core.html#a38fe6ec5220d13d96c7dad7556d2b613">collapse_contiguous_dims</a>(xs[0].shape(), strides, size_cap);</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span>}</div>
</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> </div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span>... Arrays, <span class="keyword">typename</span> = <a class="code hl_typedef" href="namespacemlx_1_1core.html#af89751d79339f3e4d9318ea97d64d114">enable_for_arrays_t</a>&lt;Arrays...&gt;&gt;</div>
<div class="foldopen" id="foldopen00070" data-start="{" data-end="}">
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core.html#ac813412cce77fc1340dcfefc6e099276"> 70</a></span><span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code hl_function" href="namespacemlx_1_1core.html#a38fe6ec5220d13d96c7dad7556d2b613">collapse_contiguous_dims</a>(Arrays&amp;&amp;... xs) {</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> <span class="keywordflow">return</span> <a class="code hl_function" href="namespacemlx_1_1core.html#a38fe6ec5220d13d96c7dad7556d2b613">collapse_contiguous_dims</a>(</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> std::vector&lt;array&gt;{std::forward&lt;Arrays&gt;(xs)...});</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span>}</div>
</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">// The single array version of the above.</span></div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core.html#aab3cc7f3808934ae0727b920eba231bd"> 76</a></span>std::pair&lt;std::vector&lt;int&gt;, std::vector&lt;int64_t&gt;&gt; <a class="code hl_function" href="namespacemlx_1_1core.html#a38fe6ec5220d13d96c7dad7556d2b613">collapse_contiguous_dims</a>(</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <span class="keyword">const</span> std::vector&lt;int&gt;&amp; shape,</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <span class="keyword">const</span> std::vector&lt;int64_t&gt;&amp; strides,</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> int64_t size_cap = std::numeric_limits&lt;int32_t&gt;::max());</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core.html#a1e0cbcf109d32794ffc8efc7302ba9b0"> 80</a></span>std::pair&lt;std::vector&lt;int&gt;, std::vector&lt;size_t&gt;&gt; <a class="code hl_function" href="namespacemlx_1_1core.html#a38fe6ec5220d13d96c7dad7556d2b613">collapse_contiguous_dims</a>(</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> <span class="keyword">const</span> std::vector&lt;int&gt;&amp; shape,</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> <span class="keyword">const</span> std::vector&lt;size_t&gt;&amp; strides,</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> <span class="keywordtype">size_t</span> size_cap = std::numeric_limits&lt;int32_t&gt;::max());</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core.html#a4ee50bfb240512d0c0ce151dfe2c74ef"> 84</a></span>std::pair&lt;std::vector&lt;int&gt;, std::vector&lt;size_t&gt;&gt; <a class="code hl_function" href="namespacemlx_1_1core.html#a38fe6ec5220d13d96c7dad7556d2b613">collapse_contiguous_dims</a>(</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> <span class="keyword">const</span> <a class="code hl_class" href="classmlx_1_1core_1_1array.html">array</a>&amp; a,</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> <span class="keywordtype">size_t</span> size_cap = std::numeric_limits&lt;int32_t&gt;::max());</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> </div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> Str<span class="keywordtype">id</span>eT&gt;</div>
<div class="foldopen" id="foldopen00089" data-start="{" data-end="};">
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"><a class="line" href="structmlx_1_1core_1_1_contiguous_iterator.html"> 89</a></span><span class="keyword">struct </span><a class="code hl_struct" href="structmlx_1_1core_1_1_contiguous_iterator.html">ContiguousIterator</a> {</div>
<div class="foldopen" id="foldopen00090" data-start="{" data-end="}">
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"><a class="line" href="structmlx_1_1core_1_1_contiguous_iterator.html#ae230bd52b70a0bbdf560090f8a6589ef"> 90</a></span> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code hl_function" href="structmlx_1_1core_1_1_contiguous_iterator.html#ae230bd52b70a0bbdf560090f8a6589ef">step</a>() {</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> <span class="keywordtype">int</span> dims = shape_.size();</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> <span class="keywordflow">if</span> (dims == 0) {</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> <span class="keywordflow">return</span>;</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> <span class="keywordtype">int</span> i = dims - 1;</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> <span class="keywordflow">while</span> (pos_[i] == (shape_[i] - 1) &amp;&amp; i &gt; 0) {</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> pos_[i] = 0;</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> <a class="code hl_variable" href="structmlx_1_1core_1_1_contiguous_iterator.html#a027b29e06d5cb467d961c019699514b1">loc</a> -= (shape_[i] - 1) * strides_[i];</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> i--;</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> }</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> pos_[i]++;</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <a class="code hl_variable" href="structmlx_1_1core_1_1_contiguous_iterator.html#a027b29e06d5cb467d961c019699514b1">loc</a> += strides_[i];</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> }</div>
</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> </div>
<div class="foldopen" id="foldopen00105" data-start="{" data-end="}">
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"><a class="line" href="structmlx_1_1core_1_1_contiguous_iterator.html#a24719ee9e8667885d29c2ad74445520c"> 105</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="structmlx_1_1core_1_1_contiguous_iterator.html#a24719ee9e8667885d29c2ad74445520c">seek</a>(StrideT n) {</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> <a class="code hl_variable" href="structmlx_1_1core_1_1_contiguous_iterator.html#a027b29e06d5cb467d961c019699514b1">loc</a> = 0;</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = shape_.size() - 1; i &gt;= 0; --i) {</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> <span class="keyword">auto</span> q_and_r = ldiv(n, shape_[i]);</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> <a class="code hl_variable" href="structmlx_1_1core_1_1_contiguous_iterator.html#a027b29e06d5cb467d961c019699514b1">loc</a> += q_and_r.rem * strides_[i];</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> pos_[i] = q_and_r.rem;</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> n = q_and_r.quot;</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> }</div>
</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> </div>
<div class="foldopen" id="foldopen00115" data-start="{" data-end="}">
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"><a class="line" href="structmlx_1_1core_1_1_contiguous_iterator.html#a56336d55be846426e9522f375fc11297"> 115</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="structmlx_1_1core_1_1_contiguous_iterator.html#a56336d55be846426e9522f375fc11297">reset</a>() {</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> <a class="code hl_variable" href="structmlx_1_1core_1_1_contiguous_iterator.html#a027b29e06d5cb467d961c019699514b1">loc</a> = 0;</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> std::fill(pos_.begin(), pos_.end(), 0);</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> }</div>
</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> </div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"><a class="line" href="structmlx_1_1core_1_1_contiguous_iterator.html#a68794af4a442d3d8ac4647817af8e1f6"> 120</a></span> <a class="code hl_function" href="structmlx_1_1core_1_1_contiguous_iterator.html#a68794af4a442d3d8ac4647817af8e1f6">ContiguousIterator</a>() {};</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> </div>
<div class="foldopen" id="foldopen00122" data-start="{" data-end="}">
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"><a class="line" href="structmlx_1_1core_1_1_contiguous_iterator.html#a6cb378408b6f546eeb6ade1a4faafe3c"> 122</a></span> <span class="keyword">explicit</span> <a class="code hl_function" href="structmlx_1_1core_1_1_contiguous_iterator.html#a6cb378408b6f546eeb6ade1a4faafe3c">ContiguousIterator</a>(<span class="keyword">const</span> <a class="code hl_class" href="classmlx_1_1core_1_1array.html">array</a>&amp; a)</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> : shape_(a.shape()), strides_(a.strides()) {</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> <span class="keywordflow">if</span> (!shape_.empty()) {</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> std::tie(shape_, strides_) = collapse_contiguous_dims(shape_, strides_);</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> pos_ = std::vector&lt;int&gt;(shape_.size(), 0);</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> }</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> }</div>
</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> </div>
<div class="foldopen" id="foldopen00130" data-start="{" data-end="}">
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"><a class="line" href="structmlx_1_1core_1_1_contiguous_iterator.html#a16bdacb53f65b7284068cd49d4cba292"> 130</a></span> <span class="keyword">explicit</span> <a class="code hl_function" href="structmlx_1_1core_1_1_contiguous_iterator.html#a16bdacb53f65b7284068cd49d4cba292">ContiguousIterator</a>(</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> <span class="keyword">const</span> std::vector&lt;int&gt;&amp; shape,</div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> <span class="keyword">const</span> std::vector&lt;StrideT&gt;&amp; strides,</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> <span class="keywordtype">int</span> dims)</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> : shape_(shape.begin(), shape.begin() + dims),</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> strides_(strides.begin(), strides.begin() + dims) {</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> <span class="keywordflow">if</span> (!shape_.empty()) {</div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> std::tie(shape_, strides_) = collapse_contiguous_dims(shape_, strides_);</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> pos_ = std::vector&lt;int&gt;(shape_.size(), 0);</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>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> </div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"><a class="line" href="structmlx_1_1core_1_1_contiguous_iterator.html#a027b29e06d5cb467d961c019699514b1"> 142</a></span> StrideT <a class="code hl_variable" href="structmlx_1_1core_1_1_contiguous_iterator.html#a027b29e06d5cb467d961c019699514b1">loc</a>{0};</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> </div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> <span class="keyword">private</span>:</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> std::vector&lt;int&gt; shape_;</div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> std::vector&lt;StrideT&gt; strides_;</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> std::vector&lt;int&gt; pos_;</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span>};</div>
</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><span class="keyword">template</span> &lt;<span class="keyword">typename</span> Str<span class="keywordtype">id</span>eT&gt;</div>
<div class="foldopen" id="foldopen00151" data-start="{" data-end="}">
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core.html#a3ba20a804c306067b7023259429e0e48"> 151</a></span><span class="keyword">inline</span> <span class="keyword">auto</span> <a class="code hl_function" href="namespacemlx_1_1core.html#a3ba20a804c306067b7023259429e0e48">check_contiguity</a>(</div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> <span class="keyword">const</span> std::vector&lt;int&gt;&amp; shape,</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span> <span class="keyword">const</span> std::vector&lt;StrideT&gt;&amp; strides) {</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> <span class="keywordtype">size_t</span> no_broadcast_data_size = 1;</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> <span class="keywordtype">size_t</span> f_stride = 1;</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> <span class="keywordtype">size_t</span> b_stride = 1;</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> <span class="keywordtype">bool</span> is_row_contiguous = <span class="keyword">true</span>;</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> <span class="keywordtype">bool</span> is_col_contiguous = <span class="keyword">true</span>;</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> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0, ri = shape.size() - 1; ri &gt;= 0; i++, ri--) {</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span> is_col_contiguous &amp;= strides[i] == f_stride || shape[i] == 1;</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span> is_row_contiguous &amp;= strides[ri] == b_stride || shape[ri] == 1;</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> f_stride *= shape[i];</div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> b_stride *= shape[ri];</div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span> <span class="keywordflow">if</span> (strides[i] &gt; 0) {</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span> no_broadcast_data_size *= shape[i];</div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> }</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span> }</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> <span class="keywordflow">return</span> std::make_tuple(</div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span> no_broadcast_data_size, is_row_contiguous, is_col_contiguous);</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span>}</div>
</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> </div>
<div class="foldopen" id="foldopen00174" data-start="{" data-end="}">
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"><a class="line" href="namespacemlx_1_1core.html#af650e831ce21759da1ac103037d08d84"> 174</a></span><span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code hl_function" href="namespacemlx_1_1core.html#af650e831ce21759da1ac103037d08d84">is_donatable</a>(<span class="keyword">const</span> <a class="code hl_class" href="classmlx_1_1core_1_1array.html">array</a>&amp; in, <span class="keyword">const</span> <a class="code hl_class" href="classmlx_1_1core_1_1array.html">array</a>&amp; out) {</div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> <span class="keyword">constexpr</span> <span class="keywordtype">size_t</span> donation_extra = 16384;</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> <span class="keywordflow">return</span> in.<a class="code hl_function" href="classmlx_1_1core_1_1array.html#a4677a404b5d191af20b52649225de087">is_donatable</a>() &amp;&amp; in.<a class="code hl_function" href="classmlx_1_1core_1_1array.html#af329d9432c92de87cbaa2de8454eefc0">itemsize</a>() == out.<a class="code hl_function" href="classmlx_1_1core_1_1array.html#af329d9432c92de87cbaa2de8454eefc0">itemsize</a>() &amp;&amp;</div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> in.<a class="code hl_function" href="classmlx_1_1core_1_1array.html#a914577c63755b2e862d2da68bbf8e3dd">buffer_size</a>() &lt;= out.<a class="code hl_function" href="classmlx_1_1core_1_1array.html#a387b67cd3ef5cfc1e749c371766c4a05">nbytes</a>() + donation_extra;</div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span>}</div>
</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">// namespace mlx::core</span></div>
<div class="ttc" id="aarray_8h_html"><div class="ttname"><a href="array_8h.html">array.h</a></div></div>
<div class="ttc" id="aclassmlx_1_1core_1_1array_html"><div class="ttname"><a href="classmlx_1_1core_1_1array.html">mlx::core::array</a></div><div class="ttdef"><b>Definition</b> array.h:20</div></div>
<div class="ttc" id="aclassmlx_1_1core_1_1array_html_a0a20a6065ae71b64c1e3aa22a45fd8a1"><div class="ttname"><a href="classmlx_1_1core_1_1array.html#a0a20a6065ae71b64c1e3aa22a45fd8a1">mlx::core::array::flags</a></div><div class="ttdeci">const Flags &amp; flags() const</div><div class="ttdoc">Get the Flags bit-field.</div><div class="ttdef"><b>Definition</b> array.h:302</div></div>
<div class="ttc" id="aclassmlx_1_1core_1_1array_html_a186cf2648da92584d5c1c8b24e69629b"><div class="ttname"><a href="classmlx_1_1core_1_1array.html#a186cf2648da92584d5c1c8b24e69629b">mlx::core::array::strides</a></div><div class="ttdeci">const std::vector&lt; size_t &gt; &amp; strides() const</div><div class="ttdoc">The strides of the array.</div><div class="ttdef"><b>Definition</b> array.h:113</div></div>
<div class="ttc" id="aclassmlx_1_1core_1_1array_html_a387b67cd3ef5cfc1e749c371766c4a05"><div class="ttname"><a href="classmlx_1_1core_1_1array.html#a387b67cd3ef5cfc1e749c371766c4a05">mlx::core::array::nbytes</a></div><div class="ttdeci">size_t nbytes() const</div><div class="ttdoc">The number of bytes in the array.</div><div class="ttdef"><b>Definition</b> array.h:89</div></div>
<div class="ttc" id="aclassmlx_1_1core_1_1array_html_a4677a404b5d191af20b52649225de087"><div class="ttname"><a href="classmlx_1_1core_1_1array.html#a4677a404b5d191af20b52649225de087">mlx::core::array::is_donatable</a></div><div class="ttdeci">bool is_donatable() const</div><div class="ttdoc">True indicates the arrays buffer is safe to reuse.</div><div class="ttdef"><b>Definition</b> array.h:267</div></div>
<div class="ttc" id="aclassmlx_1_1core_1_1array_html_a4a2a2c8a4a5beafd723fc13f2055d55d"><div class="ttname"><a href="classmlx_1_1core_1_1array.html#a4a2a2c8a4a5beafd723fc13f2055d55d">mlx::core::array::shape</a></div><div class="ttdeci">const std::vector&lt; int &gt; &amp; shape() const</div><div class="ttdoc">The shape of the array as a vector of integers.</div><div class="ttdef"><b>Definition</b> array.h:99</div></div>
<div class="ttc" id="aclassmlx_1_1core_1_1array_html_a914577c63755b2e862d2da68bbf8e3dd"><div class="ttname"><a href="classmlx_1_1core_1_1array.html#a914577c63755b2e862d2da68bbf8e3dd">mlx::core::array::buffer_size</a></div><div class="ttdeci">size_t buffer_size() const</div><div class="ttdef"><b>Definition</b> array.h:327</div></div>
<div class="ttc" id="aclassmlx_1_1core_1_1array_html_af329d9432c92de87cbaa2de8454eefc0"><div class="ttname"><a href="classmlx_1_1core_1_1array.html#af329d9432c92de87cbaa2de8454eefc0">mlx::core::array::itemsize</a></div><div class="ttdeci">size_t itemsize() const</div><div class="ttdoc">The size of the array's datatype in bytes.</div><div class="ttdef"><b>Definition</b> array.h:79</div></div>
<div class="ttc" id="anamespacemlx_1_1core_html"><div class="ttname"><a href="namespacemlx_1_1core.html">mlx::core</a></div><div class="ttdef"><b>Definition</b> allocator.h:7</div></div>
<div class="ttc" id="anamespacemlx_1_1core_html_a085379297e21d57f5b3aa38ae1c26070"><div class="ttname"><a href="namespacemlx_1_1core.html#a085379297e21d57f5b3aa38ae1c26070">mlx::core::make_contiguous_strides</a></div><div class="ttdeci">std::vector&lt; StrideT &gt; make_contiguous_strides(const std::vector&lt; int &gt; &amp;shape)</div><div class="ttdef"><b>Definition</b> utils.h:33</div></div>
<div class="ttc" id="anamespacemlx_1_1core_html_a38fe6ec5220d13d96c7dad7556d2b613"><div class="ttname"><a href="namespacemlx_1_1core.html#a38fe6ec5220d13d96c7dad7556d2b613">mlx::core::collapse_contiguous_dims</a></div><div class="ttdeci">std::tuple&lt; std::vector&lt; int &gt;, std::vector&lt; std::vector&lt; int64_t &gt; &gt; &gt; collapse_contiguous_dims(const std::vector&lt; int &gt; &amp;shape, const std::vector&lt; std::vector&lt; int64_t &gt; &gt; &amp;strides, int64_t size_cap=std::numeric_limits&lt; int32_t &gt;::max())</div></div>
<div class="ttc" id="anamespacemlx_1_1core_html_a3ba20a804c306067b7023259429e0e48"><div class="ttname"><a href="namespacemlx_1_1core.html#a3ba20a804c306067b7023259429e0e48">mlx::core::check_contiguity</a></div><div class="ttdeci">auto check_contiguity(const std::vector&lt; int &gt; &amp;shape, const std::vector&lt; StrideT &gt; &amp;strides)</div><div class="ttdef"><b>Definition</b> utils.h:151</div></div>
<div class="ttc" id="anamespacemlx_1_1core_html_a77657cb50fd9392f7f4c64e43843c2b3"><div class="ttname"><a href="namespacemlx_1_1core.html#a77657cb50fd9392f7f4c64e43843c2b3">mlx::core::elem_to_loc</a></div><div class="ttdeci">StrideT elem_to_loc(int elem, const std::vector&lt; int &gt; &amp;shape, const std::vector&lt; StrideT &gt; &amp;strides)</div><div class="ttdef"><b>Definition</b> utils.h:12</div></div>
<div class="ttc" id="anamespacemlx_1_1core_html_af650e831ce21759da1ac103037d08d84"><div class="ttname"><a href="namespacemlx_1_1core.html#af650e831ce21759da1ac103037d08d84">mlx::core::is_donatable</a></div><div class="ttdeci">bool is_donatable(const array &amp;in, const array &amp;out)</div><div class="ttdef"><b>Definition</b> utils.h:174</div></div>
<div class="ttc" id="anamespacemlx_1_1core_html_af89751d79339f3e4d9318ea97d64d114"><div class="ttname"><a href="namespacemlx_1_1core.html#af89751d79339f3e4d9318ea97d64d114">mlx::core::enable_for_arrays_t</a></div><div class="ttdeci">typename std::enable_if_t&lt; is_arrays_v&lt; T... &gt; &gt; enable_for_arrays_t</div><div class="ttdef"><b>Definition</b> array.h:611</div></div>
<div class="ttc" id="astructmlx_1_1core_1_1_contiguous_iterator_html"><div class="ttname"><a href="structmlx_1_1core_1_1_contiguous_iterator.html">mlx::core::ContiguousIterator</a></div><div class="ttdef"><b>Definition</b> utils.h:89</div></div>
<div class="ttc" id="astructmlx_1_1core_1_1_contiguous_iterator_html_a027b29e06d5cb467d961c019699514b1"><div class="ttname"><a href="structmlx_1_1core_1_1_contiguous_iterator.html#a027b29e06d5cb467d961c019699514b1">mlx::core::ContiguousIterator::loc</a></div><div class="ttdeci">StrideT loc</div><div class="ttdef"><b>Definition</b> utils.h:142</div></div>
<div class="ttc" id="astructmlx_1_1core_1_1_contiguous_iterator_html_a16bdacb53f65b7284068cd49d4cba292"><div class="ttname"><a href="structmlx_1_1core_1_1_contiguous_iterator.html#a16bdacb53f65b7284068cd49d4cba292">mlx::core::ContiguousIterator::ContiguousIterator</a></div><div class="ttdeci">ContiguousIterator(const std::vector&lt; int &gt; &amp;shape, const std::vector&lt; StrideT &gt; &amp;strides, int dims)</div><div class="ttdef"><b>Definition</b> utils.h:130</div></div>
<div class="ttc" id="astructmlx_1_1core_1_1_contiguous_iterator_html_a24719ee9e8667885d29c2ad74445520c"><div class="ttname"><a href="structmlx_1_1core_1_1_contiguous_iterator.html#a24719ee9e8667885d29c2ad74445520c">mlx::core::ContiguousIterator::seek</a></div><div class="ttdeci">void seek(StrideT n)</div><div class="ttdef"><b>Definition</b> utils.h:105</div></div>
<div class="ttc" id="astructmlx_1_1core_1_1_contiguous_iterator_html_a56336d55be846426e9522f375fc11297"><div class="ttname"><a href="structmlx_1_1core_1_1_contiguous_iterator.html#a56336d55be846426e9522f375fc11297">mlx::core::ContiguousIterator::reset</a></div><div class="ttdeci">void reset()</div><div class="ttdef"><b>Definition</b> utils.h:115</div></div>
<div class="ttc" id="astructmlx_1_1core_1_1_contiguous_iterator_html_a68794af4a442d3d8ac4647817af8e1f6"><div class="ttname"><a href="structmlx_1_1core_1_1_contiguous_iterator.html#a68794af4a442d3d8ac4647817af8e1f6">mlx::core::ContiguousIterator::ContiguousIterator</a></div><div class="ttdeci">ContiguousIterator()</div><div class="ttdef"><b>Definition</b> utils.h:120</div></div>
<div class="ttc" id="astructmlx_1_1core_1_1_contiguous_iterator_html_a6cb378408b6f546eeb6ade1a4faafe3c"><div class="ttname"><a href="structmlx_1_1core_1_1_contiguous_iterator.html#a6cb378408b6f546eeb6ade1a4faafe3c">mlx::core::ContiguousIterator::ContiguousIterator</a></div><div class="ttdeci">ContiguousIterator(const array &amp;a)</div><div class="ttdef"><b>Definition</b> utils.h:122</div></div>
<div class="ttc" id="astructmlx_1_1core_1_1_contiguous_iterator_html_ae230bd52b70a0bbdf560090f8a6589ef"><div class="ttname"><a href="structmlx_1_1core_1_1_contiguous_iterator.html#ae230bd52b70a0bbdf560090f8a6589ef">mlx::core::ContiguousIterator::step</a></div><div class="ttdeci">void step()</div><div class="ttdef"><b>Definition</b> utils.h:90</div></div>
<div class="ttc" id="astructmlx_1_1core_1_1array_1_1_flags_html_a3170fa381dc7a90f6eabcc029bdf9bfd"><div class="ttname"><a href="structmlx_1_1core_1_1array_1_1_flags.html#a3170fa381dc7a90f6eabcc029bdf9bfd">mlx::core::array::Flags::row_contiguous</a></div><div class="ttdeci">bool row_contiguous</div><div class="ttdef"><b>Definition</b> array.h:233</div></div>
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