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< li class = "navelem" > < a class = "el" href = "dir_938ab0ecf10b8b860ff766c820f665fd.html" > mlx< / a > < / li > < li class = "navelem" > < a class = "el" href = "dir_1d446c9bd3c99228254c9484e0bc5c06.html" > backend< / a > < / li > < li class = "navelem" > < a class = "el" href = "dir_d0c977ea65824390717cdb7efc36c157.html" > metal< / a > < / li > < li class = "navelem" > < a class = "el" href = "dir_70a37effa88bcbd6b791977fa1e64356.html" > kernels< / a > < / li > < / ul >
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< a href = "scatter_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 © 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 " < a class = "code" href = "kernels_2indexing_8h.html" > mlx/backend/metal/kernels/indexing.h< / a > " < / span > < / div >
< div class = "line" > < a id = "l00006" name = "l00006" > < / a > < span class = "lineno" > 6< / span > < / div >
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< div class = "line" > < a id = "l00007" name = "l00007" > < / a > < span class = "lineno" > 7< / span > < span class = "keyword" > template< / span > < < / div >
< div class = "line" > < a id = "l00008" name = "l00008" > < / a > < span class = "lineno" > 8< / span > < span class = "keyword" > typename< / span > T,< / div >
< div class = "line" > < a id = "l00009" name = "l00009" > < / a > < span class = "lineno" > 9< / span > < span class = "keyword" > typename< / span > IdxT,< / div >
< div class = "line" > < a id = "l00010" name = "l00010" > < / a > < span class = "lineno" > 10< / span > < span class = "keyword" > typename< / span > Op,< / div >
< div class = "line" > < a id = "l00011" name = "l00011" > < / a > < span class = "lineno" > 11< / span > < span class = "keywordtype" > int< / span > NIDX,< / div >
< div class = "line" > < a id = "l00012" name = "l00012" > < / a > < span class = "lineno" > 12< / span > < span class = "keywordtype" > bool< / span > UPD_ROW_CONTIG,< / div >
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< div class = "line" > < a id = "l00013" name = "l00013" > < / a > < span class = "lineno" > 13< / span > < span class = "keywordtype" > int< / span > NWORK,< / div >
< div class = "line" > < a id = "l00014" name = "l00014" > < / a > < span class = "lineno" > 14< / span > < span class = "keyword" > typename< / span > LocT> < / div >
< div class = "foldopen" id = "foldopen00015" data-start = "{" data-end = "}" >
< div class = "line" > < a id = "l00015" name = "l00015" > < / a > < span class = "lineno" > < a class = "line" href = "scatter_8h.html#a0df7206d4519defb48a6275afc12f87c" > 15< / a > < / span > METAL_FUNC < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "scatter_8h.html#a0df7206d4519defb48a6275afc12f87c" > scatter_impl< / a > (< / div >
< div class = "line" > < a id = "l00016" name = "l00016" > < / a > < span class = "lineno" > 16< / span > < span class = "keyword" > const< / span > device T* updates,< / div >
< div class = "line" > < a id = "l00017" name = "l00017" > < / a > < span class = "lineno" > 17< / span > device < a class = "code hl_struct" href = "structmlx__atomic.html" > mlx_atomic< T> < / a > * out,< / div >
< div class = "line" > < a id = "l00018" name = "l00018" > < / a > < span class = "lineno" > 18< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > int< / span > * upd_shape,< / div >
< div class = "line" > < a id = "l00019" name = "l00019" > < / a > < span class = "lineno" > 19< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > size_t< / span > * upd_strides,< / div >
< div class = "line" > < a id = "l00020" name = "l00020" > < / a > < span class = "lineno" > 20< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > size_t< / span > & upd_ndim,< / div >
< div class = "line" > < a id = "l00021" name = "l00021" > < / a > < span class = "lineno" > 21< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > size_t< / span > & upd_size,< / div >
< div class = "line" > < a id = "l00022" name = "l00022" > < / a > < span class = "lineno" > 22< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > int< / span > * out_shape,< / div >
< div class = "line" > < a id = "l00023" name = "l00023" > < / a > < span class = "lineno" > 23< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > size_t< / span > * out_strides,< / div >
< div class = "line" > < a id = "l00024" name = "l00024" > < / a > < span class = "lineno" > 24< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > size_t< / span > & out_ndim,< / div >
< div class = "line" > < a id = "l00025" name = "l00025" > < / a > < span class = "lineno" > 25< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > int< / span > * axes,< / div >
< div class = "line" > < a id = "l00026" name = "l00026" > < / a > < span class = "lineno" > 26< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > size_t< / span > & idx_size,< / div >
< div class = "line" > < a id = "l00027" name = "l00027" > < / a > < span class = "lineno" > 27< / span > < span class = "keyword" > const< / span > thread < a class = "code hl_struct" href = "struct_indices.html" > Indices< IdxT, NIDX> < / a > & indices,< / div >
< div class = "line" > < a id = "l00028" name = "l00028" > < / a > < span class = "lineno" > 28< / span > uint2 gid [[thread_position_in_grid]]) {< / div >
< div class = "line" > < a id = "l00029" name = "l00029" > < / a > < span class = "lineno" > 29< / span > Op < a class = "code hl_variable" href = "common_2binary_8h.html#a70228731d29946574b238d21fb4b360c" > op< / a > ;< / div >
< div class = "line" > < a id = "l00030" name = "l00030" > < / a > < span class = "lineno" > 30< / span > < / div >
< div class = "line" > < a id = "l00031" name = "l00031" > < / a > < span class = "lineno" > 31< / span > < span class = "keyword" > auto< / span > ind_idx = gid.y * NWORK;< / div >
< div class = "line" > < a id = "l00032" name = "l00032" > < / a > < span class = "lineno" > 32< / span > LocT out_offset = 0;< / div >
< div class = "line" > < a id = "l00033" name = "l00033" > < / a > < span class = "lineno" > 33< / span > < span class = "keywordflow" > if< / span > (upd_size > 1) {< / div >
< div class = "line" > < a id = "l00034" name = "l00034" > < / a > < span class = "lineno" > 34< / span > out_offset = < a class = "code hl_function" href = "backend_2metal_2kernels_2utils_8h.html#a22eaa505dbc7dd2a63a895f2e16712f5" > elem_to_loc< size_t, LocT> < / a > (< / div >
< div class = "line" > < a id = "l00035" name = "l00035" > < / a > < span class = "lineno" > 35< / span > gid.x, upd_shape + indices.ndim, out_strides, out_ndim);< / div >
< div class = "line" > < a id = "l00036" name = "l00036" > < / a > < span class = "lineno" > 36< / span > }< / div >
< div class = "line" > < a id = "l00037" name = "l00037" > < / a > < span class = "lineno" > 37< / span > < / div >
< div class = "line" > < a id = "l00038" name = "l00038" > < / a > < span class = "lineno" > 38< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > j = 0; j < NWORK & & ind_idx < idx_size; ++j, ind_idx++) {< / div >
< div class = "line" > < a id = "l00039" name = "l00039" > < / a > < span class = "lineno" > 39< / span > LocT out_idx = out_offset;< / div >
< div class = "line" > < a id = "l00040" name = "l00040" > < / a > < span class = "lineno" > 40< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < NIDX; ++i) {< / div >
< div class = "line" > < a id = "l00041" name = "l00041" > < / a > < span class = "lineno" > 41< / span > < span class = "keyword" > auto< / span > idx_loc = indices.row_contiguous[i]< / div >
< div class = "line" > < a id = "l00042" name = "l00042" > < / a > < span class = "lineno" > 42< / span > ? ind_idx< / div >
< div class = "line" > < a id = "l00043" name = "l00043" > < / a > < span class = "lineno" > 43< / span > : < a class = "code hl_function" href = "backend_2metal_2kernels_2utils_8h.html#a22eaa505dbc7dd2a63a895f2e16712f5" > elem_to_loc< size_t, LocT> < / a > (< / div >
< div class = "line" > < a id = "l00044" name = "l00044" > < / a > < span class = "lineno" > 44< / span > ind_idx,< / div >
< div class = "line" > < a id = "l00045" name = "l00045" > < / a > < span class = "lineno" > 45< / span > & indices.shapes[indices.ndim * i],< / div >
< div class = "line" > < a id = "l00046" name = "l00046" > < / a > < span class = "lineno" > 46< / span > & indices.strides[indices.ndim * i],< / div >
< div class = "line" > < a id = "l00047" name = "l00047" > < / a > < span class = "lineno" > 47< / span > indices.ndim);< / div >
< div class = "line" > < a id = "l00048" name = "l00048" > < / a > < span class = "lineno" > 48< / span > < span class = "keyword" > auto< / span > ax = axes[i];< / div >
< div class = "line" > < a id = "l00049" name = "l00049" > < / a > < span class = "lineno" > 49< / span > < span class = "keyword" > auto< / span > idx_val = < a class = "code hl_function" href = "kernels_2indexing_8h.html#a58a65ea6215999cd4ccb4fe757cc2dc8" > offset_neg_idx< / a > (indices.buffers[i][idx_loc], out_shape[ax]);< / div >
< div class = "line" > < a id = "l00050" name = "l00050" > < / a > < span class = "lineno" > 50< / span > out_idx +=< / div >
< div class = "line" > < a id = "l00051" name = "l00051" > < / a > < span class = "lineno" > 51< / span > < span class = "keyword" > static_cast< < / span > LocT< span class = "keyword" > > < / span > (idx_val) * < span class = "keyword" > static_cast< < / span > LocT< span class = "keyword" > > < / span > (out_strides[ax]);< / div >
< div class = "line" > < a id = "l00052" name = "l00052" > < / a > < span class = "lineno" > 52< / span > }< / div >
< div class = "line" > < a id = "l00053" name = "l00053" > < / a > < span class = "lineno" > 53< / span > < span class = "keyword" > auto< / span > upd_idx = ind_idx * < span class = "keyword" > static_cast< < / span > LocT< span class = "keyword" > > < / span > (upd_size) + gid.x;< / div >
< div class = "line" > < a id = "l00054" name = "l00054" > < / a > < span class = "lineno" > 54< / span > < span class = "keywordflow" > if< / span > < span class = "keyword" > constexpr< / span > (!UPD_ROW_CONTIG) {< / div >
< div class = "line" > < a id = "l00055" name = "l00055" > < / a > < span class = "lineno" > 55< / span > upd_idx =< / div >
< div class = "line" > < a id = "l00056" name = "l00056" > < / a > < span class = "lineno" > 56< / span > < a class = "code hl_function" href = "backend_2metal_2kernels_2utils_8h.html#a22eaa505dbc7dd2a63a895f2e16712f5" > elem_to_loc< size_t, LocT> < / a > (upd_idx, upd_shape, upd_strides, upd_ndim);< / 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 > < a class = "code hl_variable" href = "common_2binary_8h.html#a70228731d29946574b238d21fb4b360c" > op< / a > .atomic_update(out, updates[upd_idx], out_idx);< / div >
< div class = "line" > < a id = "l00059" name = "l00059" > < / a > < span class = "lineno" > 59< / span > }< / div >
< div class = "line" > < a id = "l00060" name = "l00060" > < / a > < span class = "lineno" > 60< / span > }< / div >
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< / div >
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< div class = "ttc" id = "abackend_2metal_2kernels_2utils_8h_html_a22eaa505dbc7dd2a63a895f2e16712f5" > < div class = "ttname" > < a href = "backend_2metal_2kernels_2utils_8h.html#a22eaa505dbc7dd2a63a895f2e16712f5" > elem_to_loc< / a > < / div > < div class = "ttdeci" > METAL_FUNC IdxT elem_to_loc(uint elem, constant const int *shape, constant const StrideT *strides, int ndim)< / div > < div class = "ttdef" > < b > Definition< / b > utils.h:93< / div > < / div >
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< div class = "ttc" id = "acommon_2binary_8h_html_a70228731d29946574b238d21fb4b360c" > < div class = "ttname" > < a href = "common_2binary_8h.html#a70228731d29946574b238d21fb4b360c" > op< / a > < / div > < div class = "ttdeci" > Op op< / div > < div class = "ttdef" > < b > Definition< / b > binary.h:129< / div > < / div >
< div class = "ttc" id = "akernels_2indexing_8h_html" > < div class = "ttname" > < a href = "kernels_2indexing_8h.html" > indexing.h< / a > < / div > < / div >
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< div class = "ttc" id = "akernels_2indexing_8h_html_a58a65ea6215999cd4ccb4fe757cc2dc8" > < div class = "ttname" > < a href = "kernels_2indexing_8h.html#a58a65ea6215999cd4ccb4fe757cc2dc8" > offset_neg_idx< / a > < / div > < div class = "ttdeci" > METAL_FUNC size_t offset_neg_idx(IdxT idx, int size)< / div > < div class = "ttdef" > < b > Definition< / b > indexing.h:17< / div > < / div >
< div class = "ttc" id = "ascatter_8h_html_a0df7206d4519defb48a6275afc12f87c" > < div class = "ttname" > < a href = "scatter_8h.html#a0df7206d4519defb48a6275afc12f87c" > scatter_impl< / a > < / div > < div class = "ttdeci" > METAL_FUNC void scatter_impl(const device T *updates, device mlx_atomic< T > *out, const constant int *upd_shape, const constant size_t *upd_strides, const constant size_t & upd_ndim, const constant size_t & upd_size, const constant int *out_shape, const constant size_t *out_strides, const constant size_t & out_ndim, const constant int *axes, const constant size_t & idx_size, const thread Indices< IdxT, NIDX > & indices, uint2 gid)< / div > < div class = "ttdef" > < b > Definition< / b > scatter.h:15< / div > < / div >
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< div class = "ttc" id = "astruct_indices_html" > < div class = "ttname" > < a href = "struct_indices.html" > Indices< / a > < / div > < div class = "ttdef" > < b > Definition< / b > indexing.h:8< / div > < / div >
< div class = "ttc" id = "astructmlx__atomic_html" > < div class = "ttname" > < a href = "structmlx__atomic.html" > mlx_atomic< / a > < / div > < div class = "ttdef" > < b > Definition< / b > atomic.h:25< / div > < / div >
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