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<a href="#func-members">Functions</a> </div>
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<div class="headertitle"><div class="title">reduce_row.h File Reference</div></div>
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<div class="contents">
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<p><a href="reduce__row_8h_source.html">Go to the source code of this file.</a></p>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a>
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Functions</h2></td></tr>
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<tr class="memitem:a9d5e0049a2276f43702fc6907e74a35f" id="r_a9d5e0049a2276f43702fc6907e74a35f"><td class="memTemplParams" colspan="2">template<typename T, typename U, typename Op, int N_READS = REDUCE_N_READS, int N_WRITES = REDUCE_N_WRITES> </td></tr>
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<tr class="memitem:a9d5e0049a2276f43702fc6907e74a35f"><td class="memTemplItemLeft" align="right" valign="top">METAL_FUNC void </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="#a9d5e0049a2276f43702fc6907e74a35f">per_thread_row_reduce</a> (thread U totals[N_WRITES], const device T *inputs[N_WRITES], int blocks, int extra, uint lsize_x, uint lid_x)</td></tr>
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<tr class="memdesc:a9d5e0049a2276f43702fc6907e74a35f"><td class="mdescLeft"> </td><td class="mdescRight">The thread group collaboratively reduces across the rows with bounds checking. <br /></td></tr>
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<tr class="separator:a9d5e0049a2276f43702fc6907e74a35f"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a045ec34228e77c79ec67d11c39ff097a" id="r_a045ec34228e77c79ec67d11c39ff097a"><td class="memTemplParams" colspan="2">template<typename T, typename U, typename Op, int N_READS = REDUCE_N_READS, int N_WRITES = REDUCE_N_WRITES> </td></tr>
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<tr class="memitem:a045ec34228e77c79ec67d11c39ff097a"><td class="memTemplItemLeft" align="right" valign="top">METAL_FUNC void </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="#a045ec34228e77c79ec67d11c39ff097a">per_thread_row_reduce</a> (thread U totals[N_WRITES], const device T *in, const constant size_t &reduction_size, int blocks, int extra, uint lsize_x, uint lid_x)</td></tr>
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<tr class="memdesc:a045ec34228e77c79ec67d11c39ff097a"><td class="mdescLeft"> </td><td class="mdescRight">Consecutive rows in a contiguous array. <br /></td></tr>
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<tr class="separator:a045ec34228e77c79ec67d11c39ff097a"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:aee3cf6c55bc9a6d0046030f7dfd26e6b" id="r_aee3cf6c55bc9a6d0046030f7dfd26e6b"><td class="memTemplParams" colspan="2">template<typename T, typename U, typename Op, int N_READS = REDUCE_N_READS, int N_WRITES = REDUCE_N_WRITES> </td></tr>
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<tr class="memitem:aee3cf6c55bc9a6d0046030f7dfd26e6b"><td class="memTemplItemLeft" align="right" valign="top">METAL_FUNC void </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="#aee3cf6c55bc9a6d0046030f7dfd26e6b">per_thread_row_reduce</a> (thread U totals[N_WRITES], const device T *in, const int64_t row_idx, int blocks, int extra, const constant int *shape, const constant int64_t *strides, const constant int &ndim, uint lsize_x, uint lid_x)</td></tr>
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<tr class="memdesc:aee3cf6c55bc9a6d0046030f7dfd26e6b"><td class="mdescLeft"> </td><td class="mdescRight">Consecutive rows in an arbitrarily ordered array. <br /></td></tr>
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<tr class="separator:aee3cf6c55bc9a6d0046030f7dfd26e6b"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:aa146bb611069fd2892f03714fd1cc3cf" id="r_aa146bb611069fd2892f03714fd1cc3cf"><td class="memTemplParams" colspan="2">template<typename T, typename U, typename Op, int N_READS = REDUCE_N_READS, int N_WRITES = REDUCE_N_WRITES> </td></tr>
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<tr class="memitem:aa146bb611069fd2892f03714fd1cc3cf"><td class="memTemplItemLeft" align="right" valign="top">METAL_FUNC void </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="#aa146bb611069fd2892f03714fd1cc3cf">threadgroup_reduce</a> (thread U totals[N_WRITES], threadgroup U *shared_vals, uint3 lid, uint simd_lane_id, uint simd_per_group, uint simd_group_id)</td></tr>
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<tr class="memdesc:aa146bb611069fd2892f03714fd1cc3cf"><td class="mdescLeft"> </td><td class="mdescRight">Reduce within the threadgroup. <br /></td></tr>
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<tr class="separator:aa146bb611069fd2892f03714fd1cc3cf"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:afd80a25fa84e6cc884dcc8698859ade1" id="r_afd80a25fa84e6cc884dcc8698859ade1"><td class="memTemplParams" colspan="2">template<typename T, typename U, typename Op, int N_READS = REDUCE_N_READS> </td></tr>
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<tr class="memitem:afd80a25fa84e6cc884dcc8698859ade1"><td class="memTemplItemLeft" align="right" valign="top">METAL_FUNC void </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="#afd80a25fa84e6cc884dcc8698859ade1">thread_reduce</a> (thread U &total, const device T *row, int blocks, int extra)</td></tr>
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<tr class="separator:afd80a25fa84e6cc884dcc8698859ade1"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a1e1b59fa73d2b0be978494a759f2c6ee" id="r_a1e1b59fa73d2b0be978494a759f2c6ee"><td class="memTemplParams" colspan="2">template<typename T, typename U, typename Op, typename IdxT, int NDIMS, int N_READS = REDUCE_N_READS> </td></tr>
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<tr class="memitem:a1e1b59fa73d2b0be978494a759f2c6ee"><td class="memTemplItemLeft" align="right" valign="top">void </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="#a1e1b59fa73d2b0be978494a759f2c6ee">row_reduce_small</a> (const device T *in, device U *out, const constant int64_t &row_size, const constant int64_t &non_row_reductions, const constant int *shape, const constant int64_t *strides, const constant int &ndim, const constant int *reduce_shape, const constant int64_t *reduce_strides, const constant int &reduce_ndim, uint simd_lane_id, uint3 gid, uint3 gsize, uint3 tid, uint3 tsize)</td></tr>
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<tr class="separator:a1e1b59fa73d2b0be978494a759f2c6ee"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a7dbd7cc81b1ce5a4271d56b99ce595d4" id="r_a7dbd7cc81b1ce5a4271d56b99ce595d4"><td class="memTemplParams" colspan="2">template<typename T, typename U, typename Op, typename IdxT = int64_t, int N_READS = REDUCE_N_READS, int N_WRITES = REDUCE_N_WRITES> </td></tr>
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<tr class="memitem:a7dbd7cc81b1ce5a4271d56b99ce595d4"><td class="memTemplItemLeft" align="right" valign="top">void </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="#a7dbd7cc81b1ce5a4271d56b99ce595d4">row_reduce_simple</a> (const device T *in, device U *out, const constant size_t &reduction_size, const constant int64_t &out_size, uint3 gid, uint3 gsize, uint3 lid, uint3 lsize, uint simd_lane_id, uint simd_per_group, uint simd_group_id)</td></tr>
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<tr class="separator:a7dbd7cc81b1ce5a4271d56b99ce595d4"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a72611b8006ae5642b69f4d250d69865b" id="r_a72611b8006ae5642b69f4d250d69865b"><td class="memTemplParams" colspan="2">template<typename T, typename U, typename Op, typename IdxT, int NDIMS, int N_READS = REDUCE_N_READS> </td></tr>
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<tr class="memitem:a72611b8006ae5642b69f4d250d69865b"><td class="memTemplItemLeft" align="right" valign="top">void </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="#a72611b8006ae5642b69f4d250d69865b">row_reduce_looped</a> (const device T *in, device U *out, const constant int64_t &row_size, const constant int64_t &non_row_reductions, const constant int *shape, const constant int64_t *strides, const constant int &ndim, const constant int *reduce_shape, const constant int64_t *reduce_strides, const constant int &reduce_ndim, uint3 gid, uint3 gsize, uint3 lid, uint3 lsize, uint simd_lane_id, uint simd_per_group, uint simd_group_id)</td></tr>
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<tr class="separator:a72611b8006ae5642b69f4d250d69865b"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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<h2 class="groupheader">Function Documentation</h2>
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<a id="a045ec34228e77c79ec67d11c39ff097a" name="a045ec34228e77c79ec67d11c39ff097a"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a045ec34228e77c79ec67d11c39ff097a">◆ </a></span>per_thread_row_reduce() <span class="overload">[1/3]</span></h2>
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template<typename T, typename U, typename Op, int N_READS = REDUCE_N_READS, int N_WRITES = REDUCE_N_WRITES> </div>
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<td class="memname">METAL_FUNC void per_thread_row_reduce </td>
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<td>(</td>
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<td class="paramtype">thread U</td> <td class="paramname"><span class="paramname"><em>totals</em></span>[N_WRITES], </td>
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<td class="paramtype">const device T *</td> <td class="paramname"><span class="paramname"><em>in</em></span>, </td>
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<td class="paramtype">const constant size_t &</td> <td class="paramname"><span class="paramname"><em>reduction_size</em></span>, </td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>blocks</em></span>, </td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>extra</em></span>, </td>
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<td class="paramtype">uint</td> <td class="paramname"><span class="paramname"><em>lsize_x</em></span>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">uint</td> <td class="paramname"><span class="paramname"><em>lid_x</em></span> )</td>
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</table>
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</div><div class="memdoc">
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<p>Consecutive rows in a contiguous array. </p>
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</div>
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</div>
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<a id="aee3cf6c55bc9a6d0046030f7dfd26e6b" name="aee3cf6c55bc9a6d0046030f7dfd26e6b"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#aee3cf6c55bc9a6d0046030f7dfd26e6b">◆ </a></span>per_thread_row_reduce() <span class="overload">[2/3]</span></h2>
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template<typename T, typename U, typename Op, int N_READS = REDUCE_N_READS, int N_WRITES = REDUCE_N_WRITES> </div>
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<table class="memname">
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<tr>
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<td class="memname">METAL_FUNC void per_thread_row_reduce </td>
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<td>(</td>
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<td class="paramtype">thread U</td> <td class="paramname"><span class="paramname"><em>totals</em></span>[N_WRITES], </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const device T *</td> <td class="paramname"><span class="paramname"><em>in</em></span>, </td>
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<td class="paramtype">const int64_t</td> <td class="paramname"><span class="paramname"><em>row_idx</em></span>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>blocks</em></span>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>extra</em></span>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant int *</td> <td class="paramname"><span class="paramname"><em>shape</em></span>, </td>
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<td class="paramtype">const constant int64_t *</td> <td class="paramname"><span class="paramname"><em>strides</em></span>, </td>
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<td class="paramtype">const constant int &</td> <td class="paramname"><span class="paramname"><em>ndim</em></span>, </td>
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<td class="paramtype">uint</td> <td class="paramname"><span class="paramname"><em>lsize_x</em></span>, </td>
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<td class="paramtype">uint</td> <td class="paramname"><span class="paramname"><em>lid_x</em></span> )</td>
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<p>Consecutive rows in an arbitrarily ordered array. </p>
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<a id="a9d5e0049a2276f43702fc6907e74a35f" name="a9d5e0049a2276f43702fc6907e74a35f"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a9d5e0049a2276f43702fc6907e74a35f">◆ </a></span>per_thread_row_reduce() <span class="overload">[3/3]</span></h2>
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template<typename T, typename U, typename Op, int N_READS = REDUCE_N_READS, int N_WRITES = REDUCE_N_WRITES> </div>
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<table class="memname">
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<tr>
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<td class="memname">METAL_FUNC void per_thread_row_reduce </td>
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<td>(</td>
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<td class="paramtype">thread U</td> <td class="paramname"><span class="paramname"><em>totals</em></span>[N_WRITES], </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const device T *</td> <td class="paramname"><span class="paramname"><em>inputs</em></span>[N_WRITES], </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>blocks</em></span>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>extra</em></span>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint</td> <td class="paramname"><span class="paramname"><em>lsize_x</em></span>, </td>
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</tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint</td> <td class="paramname"><span class="paramname"><em>lid_x</em></span> )</td>
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</div><div class="memdoc">
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<p>The thread group collaboratively reduces across the rows with bounds checking. </p>
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<p>In the end each thread holds a part of the reduction. </p>
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</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a72611b8006ae5642b69f4d250d69865b">◆ </a></span>row_reduce_looped()</h2>
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<div class="memitem">
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<div class="memproto">
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<div class="memtemplate">
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template<typename T, typename U, typename Op, typename IdxT, int NDIMS, int N_READS = REDUCE_N_READS> </div>
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<table class="memname">
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<tr>
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<td class="memname">void row_reduce_looped </td>
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<td>(</td>
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<td class="paramtype">const device T *</td> <td class="paramname"><span class="paramname"><em>in</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">device U *</td> <td class="paramname"><span class="paramname"><em>out</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant int64_t &</td> <td class="paramname"><span class="paramname"><em>row_size</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant int64_t &</td> <td class="paramname"><span class="paramname"><em>non_row_reductions</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant int *</td> <td class="paramname"><span class="paramname"><em>shape</em></span>, </td>
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</tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant int64_t *</td> <td class="paramname"><span class="paramname"><em>strides</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant int &</td> <td class="paramname"><span class="paramname"><em>ndim</em></span>, </td>
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</tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant int *</td> <td class="paramname"><span class="paramname"><em>reduce_shape</em></span>, </td>
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</tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant int64_t *</td> <td class="paramname"><span class="paramname"><em>reduce_strides</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant int &</td> <td class="paramname"><span class="paramname"><em>reduce_ndim</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>gid</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>gsize</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>lid</em></span>, </td>
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</tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>lsize</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint</td> <td class="paramname"><span class="paramname"><em>simd_lane_id</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint</td> <td class="paramname"><span class="paramname"><em>simd_per_group</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint</td> <td class="paramname"><span class="paramname"><em>simd_group_id</em></span> )</td>
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</tr>
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</div><div class="memdoc">
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<h2 class="memtitle"><span class="permalink"><a href="#a7dbd7cc81b1ce5a4271d56b99ce595d4">◆ </a></span>row_reduce_simple()</h2>
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<div class="memitem">
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<div class="memproto">
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<div class="memtemplate">
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template<typename T, typename U, typename Op, typename IdxT = int64_t, int N_READS = REDUCE_N_READS, int N_WRITES = REDUCE_N_WRITES> </div>
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<table class="memname">
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<tr>
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<td class="memname">void row_reduce_simple </td>
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<td>(</td>
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<td class="paramtype">const device T *</td> <td class="paramname"><span class="paramname"><em>in</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">device U *</td> <td class="paramname"><span class="paramname"><em>out</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant size_t &</td> <td class="paramname"><span class="paramname"><em>reduction_size</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant int64_t &</td> <td class="paramname"><span class="paramname"><em>out_size</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>gid</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>gsize</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>lid</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>lsize</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint</td> <td class="paramname"><span class="paramname"><em>simd_lane_id</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint</td> <td class="paramname"><span class="paramname"><em>simd_per_group</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint</td> <td class="paramname"><span class="paramname"><em>simd_group_id</em></span> )</td>
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</tr>
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</table>
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</div><div class="memdoc">
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</div>
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</div>
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<a id="a1e1b59fa73d2b0be978494a759f2c6ee" name="a1e1b59fa73d2b0be978494a759f2c6ee"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a1e1b59fa73d2b0be978494a759f2c6ee">◆ </a></span>row_reduce_small()</h2>
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<div class="memitem">
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<div class="memproto">
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<div class="memtemplate">
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template<typename T, typename U, typename Op, typename IdxT, int NDIMS, int N_READS = REDUCE_N_READS> </div>
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<table class="memname">
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<tr>
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<td class="memname">void row_reduce_small </td>
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<td>(</td>
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<td class="paramtype">const device T *</td> <td class="paramname"><span class="paramname"><em>in</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">device U *</td> <td class="paramname"><span class="paramname"><em>out</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant int64_t &</td> <td class="paramname"><span class="paramname"><em>row_size</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant int64_t &</td> <td class="paramname"><span class="paramname"><em>non_row_reductions</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant int *</td> <td class="paramname"><span class="paramname"><em>shape</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant int64_t *</td> <td class="paramname"><span class="paramname"><em>strides</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant int &</td> <td class="paramname"><span class="paramname"><em>ndim</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant int *</td> <td class="paramname"><span class="paramname"><em>reduce_shape</em></span>, </td>
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</tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant int64_t *</td> <td class="paramname"><span class="paramname"><em>reduce_strides</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const constant int &</td> <td class="paramname"><span class="paramname"><em>reduce_ndim</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint</td> <td class="paramname"><span class="paramname"><em>simd_lane_id</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>gid</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>gsize</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>tid</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>tsize</em></span> )</td>
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</tr>
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</table>
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</div><div class="memdoc">
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<a id="afd80a25fa84e6cc884dcc8698859ade1" name="afd80a25fa84e6cc884dcc8698859ade1"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#afd80a25fa84e6cc884dcc8698859ade1">◆ </a></span>thread_reduce()</h2>
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<div class="memproto">
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template<typename T, typename U, typename Op, int N_READS = REDUCE_N_READS> </div>
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<table class="memname">
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<tr>
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<td class="memname">METAL_FUNC void thread_reduce </td>
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<td>(</td>
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<td class="paramtype">thread U &</td> <td class="paramname"><span class="paramname"><em>total</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const device T *</td> <td class="paramname"><span class="paramname"><em>row</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>blocks</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>extra</em></span> )</td>
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</div><div class="memdoc">
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<a id="aa146bb611069fd2892f03714fd1cc3cf" name="aa146bb611069fd2892f03714fd1cc3cf"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#aa146bb611069fd2892f03714fd1cc3cf">◆ </a></span>threadgroup_reduce()</h2>
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<div class="memitem">
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<div class="memproto">
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<div class="memtemplate">
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template<typename T, typename U, typename Op, int N_READS = REDUCE_N_READS, int N_WRITES = REDUCE_N_WRITES> </div>
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<table class="memname">
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<td class="memname">METAL_FUNC void threadgroup_reduce </td>
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<td>(</td>
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<td class="paramtype">thread U</td> <td class="paramname"><span class="paramname"><em>totals</em></span>[N_WRITES], </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">threadgroup U *</td> <td class="paramname"><span class="paramname"><em>shared_vals</em></span>, </td>
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</tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>lid</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint</td> <td class="paramname"><span class="paramname"><em>simd_lane_id</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint</td> <td class="paramname"><span class="paramname"><em>simd_per_group</em></span>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">uint</td> <td class="paramname"><span class="paramname"><em>simd_group_id</em></span> )</td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Reduce within the threadgroup. </p>
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</div>
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</div>
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