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< a href = "gather_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 >
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< div class = "line" > < a id = "l00007" name = "l00007" > < / a > < span class = "lineno" > 7< / span > < span class = "keyword" > template< / span > < < span class = "keyword" > typename< / span > T, < span class = "keyword" > typename< / span > IdxT, < span class = "keywordtype" > int< / span > NIDX, < span class = "keywordtype" > int< / span > IDX_NDIM, < span class = "keyword" > typename< / span > LocT> < / div >
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< div class = "line" > < a id = "l00008" name = "l00008" > < / a > < span class = "lineno" > < a class = "line" href = "gather_8h.html#a5cf4ff9849edd2d99ff24ab4a6c9cd5d" > 8< / a > < / span > METAL_FUNC < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "gather_8h.html#a5cf4ff9849edd2d99ff24ab4a6c9cd5d" > gather_impl< / a > (< / div >
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< div class = "line" > < a id = "l00009" name = "l00009" > < / a > < span class = "lineno" > 9< / span > < span class = "keyword" > const< / span > device T* src [[buffer(0)]],< / div >
< div class = "line" > < a id = "l00010" name = "l00010" > < / a > < span class = "lineno" > 10< / span > device T* out [[buffer(1)]],< / div >
< div class = "line" > < a id = "l00011" name = "l00011" > < / a > < span class = "lineno" > 11< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > int< / span > * src_shape [[buffer(2)]],< / div >
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< div class = "line" > < a id = "l00012" name = "l00012" > < / a > < span class = "lineno" > 12< / span > < span class = "keyword" > const< / span > constant int64_t* src_strides [[buffer(3)]],< / div >
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< div class = "line" > < a id = "l00013" name = "l00013" > < / a > < span class = "lineno" > 13< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > size_t< / span > & src_ndim [[buffer(4)]],< / div >
< div class = "line" > < a id = "l00014" name = "l00014" > < / a > < span class = "lineno" > 14< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > int< / span > * slice_sizes [[buffer(5)]],< / div >
< div class = "line" > < a id = "l00015" name = "l00015" > < / a > < span class = "lineno" > 15< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > int< / span > * axes [[buffer(6)]],< / div >
< div class = "line" > < a id = "l00016" name = "l00016" > < / a > < span class = "lineno" > 16< / 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 = "l00017" name = "l00017" > < / a > < span class = "lineno" > 17< / span > uint3 index [[thread_position_in_grid]],< / div >
< div class = "line" > < a id = "l00018" name = "l00018" > < / a > < span class = "lineno" > 18< / span > uint3 grid_dim [[threads_per_grid]]) {< / div >
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< div class = "line" > < a id = "l00019" name = "l00019" > < / a > < span class = "lineno" > 19< / span > LocT src_idx = 0;< / div >
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< div class = "line" > < a id = "l00020" name = "l00020" > < / a > < span class = "lineno" > 20< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < NIDX; ++i) {< / div >
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< div class = "line" > < a id = "l00021" name = "l00021" > < / a > < span class = "lineno" > 21< / span > LocT idx_loc;< / div >
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< div class = "line" > < a id = "l00022" name = "l00022" > < / a > < span class = "lineno" > 22< / span > < span class = "keywordflow" > if< / span > (IDX_NDIM == 0) {< / div >
< div class = "line" > < a id = "l00023" name = "l00023" > < / a > < span class = "lineno" > 23< / span > idx_loc = 0;< / div >
< div class = "line" > < a id = "l00024" name = "l00024" > < / a > < span class = "lineno" > 24< / span > } < span class = "keywordflow" > else< / span > < span class = "keywordflow" > if< / span > (IDX_NDIM == 1) {< / div >
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< div class = "line" > < a id = "l00025" name = "l00025" > < / a > < span class = "lineno" > 25< / span > idx_loc = index.x * < span class = "keyword" > static_cast< < / span > LocT< span class = "keyword" > > < / span > (indices.strides[indices.ndim * i]);< / div >
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< div class = "line" > < a id = "l00026" name = "l00026" > < / a > < span class = "lineno" > 26< / span > } < span class = "keywordflow" > else< / span > {< / div >
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< div class = "line" > < a id = "l00027" name = "l00027" > < / a > < span class = "lineno" > 27< / span > idx_loc = index.x * < span class = "keyword" > static_cast< < / span > LocT< span class = "keyword" > > < / span > (indices.strides[indices.ndim * i]);< / div >
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< div class = "line" > < a id = "l00028" name = "l00028" > < / a > < span class = "lineno" > 28< / span > idx_loc += indices.row_contiguous[i]< / div >
< div class = "line" > < a id = "l00029" name = "l00029" > < / a > < span class = "lineno" > 29< / span > ? index.y< / div >
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< div class = "line" > < a id = "l00030" name = "l00030" > < / a > < span class = "lineno" > 30< / span > : < a class = "code hl_function" href = "backend_2metal_2kernels_2utils_8h.html#a497dd9f1a00c8a4303d8782158a0812a" > elem_to_loc< LocT> < / a > (< / div >
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< div class = "line" > < a id = "l00031" name = "l00031" > < / a > < span class = "lineno" > 31< / span > index.y,< / div >
< div class = "line" > < a id = "l00032" name = "l00032" > < / a > < span class = "lineno" > 32< / span > & indices.shapes[indices.ndim * i + 1],< / div >
< div class = "line" > < a id = "l00033" name = "l00033" > < / a > < span class = "lineno" > 33< / span > & indices.strides[indices.ndim * i + 1],< / div >
< div class = "line" > < a id = "l00034" name = "l00034" > < / a > < span class = "lineno" > 34< / span > indices.ndim - 1);< / div >
< div class = "line" > < a id = "l00035" name = "l00035" > < / a > < span class = "lineno" > 35< / span > }< / div >
< div class = "line" > < a id = "l00036" name = "l00036" > < / a > < span class = "lineno" > 36< / span > < span class = "keyword" > auto< / span > ax = axes[i];< / div >
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< div class = "line" > < a id = "l00037" name = "l00037" > < / a > < span class = "lineno" > 37< / 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], src_shape[ax]);< / div >
< div class = "line" > < a id = "l00038" name = "l00038" > < / a > < span class = "lineno" > 38< / span > src_idx += < span class = "keyword" > static_cast< < / span > LocT< span class = "keyword" > > < / span > (idx_val) * < span class = "keyword" > static_cast< < / span > LocT< span class = "keyword" > > < / span > (src_strides[ax]);< / div >
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< div class = "line" > < a id = "l00039" name = "l00039" > < / a > < span class = "lineno" > 39< / span > }< / div >
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< div class = "line" > < a id = "l00040" name = "l00040" > < / a > < span class = "lineno" > 40< / span > < / div >
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< div class = "line" > < a id = "l00041" name = "l00041" > < / a > < span class = "lineno" > 41< / span > < span class = "keyword" > auto< / span > src_offset =< / div >
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< div class = "line" > < a id = "l00042" name = "l00042" > < / a > < span class = "lineno" > 42< / span > < a class = "code hl_function" href = "backend_2metal_2kernels_2utils_8h.html#a497dd9f1a00c8a4303d8782158a0812a" > elem_to_loc< LocT> < / a > (index.z, slice_sizes, src_strides, src_ndim);< / div >
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< div class = "line" > < a id = "l00043" name = "l00043" > < / a > < span class = "lineno" > 43< / span > < / div >
< div class = "line" > < a id = "l00044" name = "l00044" > < / a > < span class = "lineno" > 44< / span > LocT out_idx = index.z;< / div >
< div class = "line" > < a id = "l00045" name = "l00045" > < / a > < span class = "lineno" > 45< / span > < span class = "keywordflow" > if< / span > (IDX_NDIM == 1) {< / div >
< div class = "line" > < a id = "l00046" name = "l00046" > < / a > < span class = "lineno" > 46< / span > out_idx += < span class = "keyword" > static_cast< < / span > LocT< span class = "keyword" > > < / span > (grid_dim.z) * index.x;< / div >
< div class = "line" > < a id = "l00047" name = "l00047" > < / a > < span class = "lineno" > 47< / span > } < span class = "keywordflow" > else< / span > < span class = "keywordflow" > if< / span > (IDX_NDIM > = 2) {< / div >
< div class = "line" > < a id = "l00048" name = "l00048" > < / a > < span class = "lineno" > 48< / span > out_idx += grid_dim.z * (index.x * < span class = "keyword" > static_cast< < / span > LocT< span class = "keyword" > > < / span > (grid_dim.y) + index.y);< / div >
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< div class = "line" > < a id = "l00049" name = "l00049" > < / a > < span class = "lineno" > 49< / span > }< / div >
< div class = "line" > < a id = "l00050" name = "l00050" > < / a > < span class = "lineno" > 50< / span > out[out_idx] = src[src_offset + src_idx];< / div >
< div class = "line" > < a id = "l00051" name = "l00051" > < / a > < span class = "lineno" > 51< / span > }< / div >
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< div class = "ttc" id = "abackend_2metal_2kernels_2utils_8h_html_a497dd9f1a00c8a4303d8782158a0812a" > < div class = "ttname" > < a href = "backend_2metal_2kernels_2utils_8h.html#a497dd9f1a00c8a4303d8782158a0812a" > elem_to_loc< / a > < / div > < div class = "ttdeci" > METAL_FUNC IdxT elem_to_loc(IdxT elem, constant const int *shape, constant const int64_t *strides, int ndim)< / div > < div class = "ttdef" > < b > Definition< / b > utils.h:93< / div > < / div >
< div class = "ttc" id = "agather_8h_html_a5cf4ff9849edd2d99ff24ab4a6c9cd5d" > < div class = "ttname" > < a href = "gather_8h.html#a5cf4ff9849edd2d99ff24ab4a6c9cd5d" > gather_impl< / a > < / div > < div class = "ttdeci" > METAL_FUNC void gather_impl(const device T *src, device T *out, const constant int *src_shape, const constant int64_t *src_strides, const constant size_t & src_ndim, const constant int *slice_sizes, const constant int *axes, const thread Indices< IdxT, NIDX > & indices, uint3 index, uint3 grid_dim)< / div > < div class = "ttdef" > < b > Definition< / b > gather.h:8< / div > < / div >
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< 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 = "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 >
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