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<a href="#func-members">Functions</a> </div>
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<div class="headertitle"><div class="title">reduce_col.h File Reference</div></div>
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</div><!--header-->
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<div class="contents">
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<p><a href="reduce__col_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:a674f4b6075bab1b89778e10ab24c557e" id="r_a674f4b6075bab1b89778e10ab24c557e"><td class="memTemplParams" colspan="2">template<typename T, typename U, typename Op, typename IdxT, int NDIMS> </td></tr>
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<tr class="memitem:a674f4b6075bab1b89778e10ab24c557e"><td class="memTemplItemLeft" align="right" valign="top">void </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="#a674f4b6075bab1b89778e10ab24c557e">col_reduce_small</a> (const device T *in, device U *out, const constant size_t &reduction_size, const constant int64_t &reduction_stride, 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, const constant size_t &non_col_reductions, uint3 gid, uint3 gsize, uint3 lid, uint3 lsize)</td></tr>
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<tr class="separator:a674f4b6075bab1b89778e10ab24c557e"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a00bb1ed154aef8c1d2cb15d0c4231a51" id="r_a00bb1ed154aef8c1d2cb15d0c4231a51"><td class="memTemplParams" colspan="2">template<typename T, typename U, typename Op, typename IdxT, int NDIMS> </td></tr>
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<tr class="memitem:a00bb1ed154aef8c1d2cb15d0c4231a51"><td class="memTemplItemLeft" align="right" valign="top">void </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="#a00bb1ed154aef8c1d2cb15d0c4231a51">col_reduce_longcolumn</a> (const device T *in, device U *out, const constant size_t &reduction_size, const constant size_t &reduction_stride, 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, const constant size_t &non_col_reductions, const constant size_t &out_size, uint3 gid, uint3 gsize, uint3 lid, uint3 lsize)</td></tr>
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<tr class="separator:a00bb1ed154aef8c1d2cb15d0c4231a51"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a59be8d8c4bca2217f62ea868550393c0" id="r_a59be8d8c4bca2217f62ea868550393c0"><td class="memTemplParams" colspan="2">template<typename T, typename U, typename Op, typename IdxT, int NDIMS, int BM, int BN> </td></tr>
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<tr class="memitem:a59be8d8c4bca2217f62ea868550393c0"><td class="memTemplItemLeft" align="right" valign="top">void </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="#a59be8d8c4bca2217f62ea868550393c0">col_reduce_looped</a> (const device T *in, device U *out, const constant size_t &reduction_size, const constant int64_t &reduction_stride, 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, const constant size_t &non_col_reductions, uint3 gid, uint3 gsize, uint simd_lane_id, uint simd_group_id)</td></tr>
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<tr class="memdesc:a59be8d8c4bca2217f62ea868550393c0"><td class="mdescLeft"> </td><td class="mdescRight">Our approach is the following simple looped approach: <br /></td></tr>
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<tr class="separator:a59be8d8c4bca2217f62ea868550393c0"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a5a3d4847e4ae940d3a532d790c0b9b27" id="r_a5a3d4847e4ae940d3a532d790c0b9b27"><td class="memTemplParams" colspan="2">template<typename T, typename U, typename Op, typename IdxT, int NDIMS, int BM, int BN> </td></tr>
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<tr class="memitem:a5a3d4847e4ae940d3a532d790c0b9b27"><td class="memTemplItemLeft" align="right" valign="top">void </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="#a5a3d4847e4ae940d3a532d790c0b9b27">col_reduce_2pass</a> (const device T *in, device U *out, const constant size_t &reduction_size, const constant int64_t &reduction_stride, 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, const constant size_t &non_col_reductions, const constant size_t &out_size, uint3 gid, uint3 gsize, uint simd_lane_id, uint simd_group_id)</td></tr>
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<tr class="separator:a5a3d4847e4ae940d3a532d790c0b9b27"><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="a5a3d4847e4ae940d3a532d790c0b9b27" name="a5a3d4847e4ae940d3a532d790c0b9b27"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a5a3d4847e4ae940d3a532d790c0b9b27">◆ </a></span>col_reduce_2pass()</h2>
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template<typename T, typename U, typename Op, typename IdxT, int NDIMS, int BM, int BN> </div>
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<td class="memname">void col_reduce_2pass </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">device U *</td> <td class="paramname"><span class="paramname"><em>out</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">const constant int64_t &</td> <td class="paramname"><span class="paramname"><em>reduction_stride</em></span>, </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">const constant int *</td> <td class="paramname"><span class="paramname"><em>reduce_shape</em></span>, </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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<td class="paramtype">const constant int &</td> <td class="paramname"><span class="paramname"><em>reduce_ndim</em></span>, </td>
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<td class="paramtype">const constant size_t &</td> <td class="paramname"><span class="paramname"><em>non_col_reductions</em></span>, </td>
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<td class="paramtype">const constant size_t &</td> <td class="paramname"><span class="paramname"><em>out_size</em></span>, </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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<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>gsize</em></span>, </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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<td class="paramtype">uint</td> <td class="paramname"><span class="paramname"><em>simd_group_id</em></span> )</td>
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<a id="a00bb1ed154aef8c1d2cb15d0c4231a51" name="a00bb1ed154aef8c1d2cb15d0c4231a51"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a00bb1ed154aef8c1d2cb15d0c4231a51">◆ </a></span>col_reduce_longcolumn()</h2>
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template<typename T, typename U, typename Op, typename IdxT, int NDIMS> </div>
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<td class="memname">void col_reduce_longcolumn </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">device U *</td> <td class="paramname"><span class="paramname"><em>out</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">const constant size_t &</td> <td class="paramname"><span class="paramname"><em>reduction_stride</em></span>, </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">const constant int *</td> <td class="paramname"><span class="paramname"><em>reduce_shape</em></span>, </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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<td class="paramtype">const constant int &</td> <td class="paramname"><span class="paramname"><em>reduce_ndim</em></span>, </td>
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<td class="paramtype">const constant size_t &</td> <td class="paramname"><span class="paramname"><em>non_col_reductions</em></span>, </td>
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<td class="paramtype">const constant size_t &</td> <td class="paramname"><span class="paramname"><em>out_size</em></span>, </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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<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>lsize</em></span> )</td>
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<h2 class="memtitle"><span class="permalink"><a href="#a59be8d8c4bca2217f62ea868550393c0">◆ </a></span>col_reduce_looped()</h2>
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template<typename T, typename U, typename Op, typename IdxT, int NDIMS, int BM, int BN> </div>
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<td class="memname">void col_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 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>reduction_stride</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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<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">const constant size_t &</td> <td class="paramname"><span class="paramname"><em>non_col_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">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>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
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<td class="paramtype">uint</td> <td class="paramname"><span class="paramname"><em>simd_lane_id</em></span>, </td>
|
|
</tr>
|
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<tr>
|
|
<td class="paramkey"></td>
|
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<td></td>
|
|
<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>Our approach is the following simple looped approach: </p>
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<ol type="1">
|
|
<li>Each thread keeps running totals for BN / n_simdgroups outputs.</li>
|
|
<li>Load a tile BM, BN in registers and accumulate in the running totals</li>
|
|
<li>Move ahead by BM steps until the column axis and the non column reductions are exhausted.</li>
|
|
<li>If BM == 32 then transpose in SM and simd reduce the running totals. Otherwise write in shared memory and BN threads accumulate the running totals with a loop.</li>
|
|
<li>Write them to the output </li>
|
|
</ol>
|
|
|
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</div>
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</div>
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<a id="a674f4b6075bab1b89778e10ab24c557e" name="a674f4b6075bab1b89778e10ab24c557e"></a>
|
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<h2 class="memtitle"><span class="permalink"><a href="#a674f4b6075bab1b89778e10ab24c557e">◆ </a></span>col_reduce_small()</h2>
|
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|
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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> </div>
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<table class="memname">
|
|
<tr>
|
|
<td class="memname">void col_reduce_small </td>
|
|
<td>(</td>
|
|
<td class="paramtype">const device T *</td> <td class="paramname"><span class="paramname"><em>in</em></span>, </td>
|
|
</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
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<td class="paramtype">device U *</td> <td class="paramname"><span class="paramname"><em>out</em></span>, </td>
|
|
</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
|
<td class="paramtype">const constant size_t &</td> <td class="paramname"><span class="paramname"><em>reduction_size</em></span>, </td>
|
|
</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
|
<td class="paramtype">const constant int64_t &</td> <td class="paramname"><span class="paramname"><em>reduction_stride</em></span>, </td>
|
|
</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
|
<td class="paramtype">const constant int *</td> <td class="paramname"><span class="paramname"><em>shape</em></span>, </td>
|
|
</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
|
<td class="paramtype">const constant int64_t *</td> <td class="paramname"><span class="paramname"><em>strides</em></span>, </td>
|
|
</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
|
<td class="paramtype">const constant int &</td> <td class="paramname"><span class="paramname"><em>ndim</em></span>, </td>
|
|
</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
|
<td class="paramtype">const constant int *</td> <td class="paramname"><span class="paramname"><em>reduce_shape</em></span>, </td>
|
|
</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
|
<td class="paramtype">const constant int64_t *</td> <td class="paramname"><span class="paramname"><em>reduce_strides</em></span>, </td>
|
|
</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
|
<td class="paramtype">const constant int &</td> <td class="paramname"><span class="paramname"><em>reduce_ndim</em></span>, </td>
|
|
</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
|
<td class="paramtype">const constant size_t &</td> <td class="paramname"><span class="paramname"><em>non_col_reductions</em></span>, </td>
|
|
</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
|
<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>gid</em></span>, </td>
|
|
</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
|
<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>gsize</em></span>, </td>
|
|
</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
|
<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>lid</em></span>, </td>
|
|
</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
|
<td class="paramtype">uint3</td> <td class="paramname"><span class="paramname"><em>lsize</em></span> )</td>
|
|
</tr>
|
|
</table>
|
|
</div><div class="memdoc">
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|
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