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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 > < li class = "navelem" > < a class = "el" href = "dir_f60cd69d27fd3faa641c79056fff0e2d.html" > reduction< / a > < / li > < / ul >
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< a href = "reduce__col_8h.html" > Go to the documentation of this file.< / a > < div class = "fragment" > < div class = "line" > < a id = "l00001" name = "l00001" > < / a > < span class = "lineno" > 1< / span > < span class = "comment" > // Copyright © 2023-2024 Apple Inc.< / span > < / div >
< div class = "line" > < a id = "l00002" name = "l00002" > < / a > < span class = "lineno" > 2< / span > < / div >
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< div class = "line" > < a id = "l00003" name = "l00003" > < / a > < span class = "lineno" > 3< / span > < span class = "keyword" > template< / span > < < / div >
< div class = "line" > < a id = "l00004" name = "l00004" > < / a > < span class = "lineno" > 4< / span > < span class = "keyword" > typename< / span > T,< / div >
< div class = "line" > < a id = "l00005" name = "l00005" > < / a > < span class = "lineno" > 5< / span > < span class = "keyword" > typename< / span > U,< / div >
< div class = "line" > < a id = "l00006" name = "l00006" > < / a > < span class = "lineno" > 6< / span > < span class = "keyword" > typename< / span > Op,< / div >
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< div class = "line" > < a id = "l00007" name = "l00007" > < / a > < span class = "lineno" > 7< / span > < span class = "keywordtype" > int< / span > NDIMS,< / div >
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< div class = "line" > < a id = "l00008" name = "l00008" > < / a > < span class = "lineno" > 8< / span > < span class = "keywordtype" > int< / span > N_READS = < a class = "code hl_variable" href = "defines_8h.html#a2ad505864a2ab786147766900bc18c21" > REDUCE_N_READS< / a > > < / div >
< div class = "foldopen" id = "foldopen00009" data-start = "{" data-end = "}" >
< div class = "line" > < a id = "l00009" name = "l00009" > < / a > < span class = "lineno" > < a class = "line" href = "reduce__col_8h.html#adf7aeb18cd1d5042cf6d9b46b582d8ce" > 9< / a > < / span > [[kernel]] < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "reduce__col_8h.html#adf7aeb18cd1d5042cf6d9b46b582d8ce" > col_reduce_small< / a > (< / div >
< div class = "line" > < a id = "l00010" name = "l00010" > < / a > < span class = "lineno" > 10< / span > < span class = "keyword" > const< / span > device T* in [[buffer(0)]],< / div >
< div class = "line" > < a id = "l00011" name = "l00011" > < / a > < span class = "lineno" > 11< / span > device U* out [[buffer(1)]],< / div >
< div class = "line" > < a id = "l00012" name = "l00012" > < / a > < span class = "lineno" > 12< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > size_t< / span > & reduction_size [[buffer(2)]],< / div >
< 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 > & reduction_stride [[buffer(3)]],< / 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 > * shape [[buffer(4)]],< / div >
< div class = "line" > < a id = "l00015" name = "l00015" > < / a > < span class = "lineno" > 15< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > size_t< / span > * strides [[buffer(5)]],< / div >
< div class = "line" > < a id = "l00016" name = "l00016" > < / a > < span class = "lineno" > 16< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > int< / span > & ndim [[buffer(6)]],< / div >
< div class = "line" > < a id = "l00017" name = "l00017" > < / a > < span class = "lineno" > 17< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > int< / span > * reduce_shape [[buffer(7)]],< / div >
< div class = "line" > < a id = "l00018" name = "l00018" > < / a > < span class = "lineno" > 18< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > size_t< / span > * reduce_strides [[buffer(8)]],< / div >
< div class = "line" > < a id = "l00019" name = "l00019" > < / a > < span class = "lineno" > 19< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > int< / span > & reduce_ndim [[buffer(9)]],< / 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 > & non_col_reductions [[buffer(10)]],< / div >
< div class = "line" > < a id = "l00021" name = "l00021" > < / a > < span class = "lineno" > 21< / span > uint3 gid [[threadgroup_position_in_grid]],< / div >
< div class = "line" > < a id = "l00022" name = "l00022" > < / a > < span class = "lineno" > 22< / span > uint3 gsize [[threadgroups_per_grid]],< / div >
< div class = "line" > < a id = "l00023" name = "l00023" > < / a > < span class = "lineno" > 23< / span > uint simd_lane_id [[thread_index_in_simdgroup]],< / div >
< div class = "line" > < a id = "l00024" name = "l00024" > < / a > < span class = "lineno" > 24< / span > uint simd_group_id [[simdgroup_index_in_threadgroup]],< / div >
< div class = "line" > < a id = "l00025" name = "l00025" > < / a > < span class = "lineno" > 25< / span > uint3 tid [[thread_position_in_grid]],< / div >
< div class = "line" > < a id = "l00026" name = "l00026" > < / a > < span class = "lineno" > 26< / span > uint3 tsize [[threads_per_grid]]) {< / div >
< div class = "line" > < a id = "l00027" name = "l00027" > < / a > < span class = "lineno" > 27< / span > Op < a class = "code hl_variable" href = "common_2binary_8h.html#a70228731d29946574b238d21fb4b360c" > op< / a > ;< / div >
< div class = "line" > < a id = "l00028" name = "l00028" > < / a > < span class = "lineno" > 28< / span > < a class = "code hl_struct" href = "structlooped__elem__to__loc.html" > looped_elem_to_loc< NDIMS> < / a > loop;< / div >
< div class = "line" > < a id = "l00029" name = "l00029" > < / a > < span class = "lineno" > 29< / span > < span class = "keyword" > const< / span > device T* row;< / 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 = "comment" > // Case 1: Small row small column< / span > < / div >
< div class = "line" > < a id = "l00032" name = "l00032" > < / a > < span class = "lineno" > 32< / span > < span class = "keywordflow" > if< / span > (reduction_size * non_col_reductions < 64 & & reduction_stride < 32) {< / div >
< div class = "line" > < a id = "l00033" name = "l00033" > < / a > < span class = "lineno" > 33< / span > U totals[31];< / div >
< div class = "line" > < a id = "l00034" name = "l00034" > < / a > < span class = "lineno" > 34< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < 31; i++) {< / div >
< div class = "line" > < a id = "l00035" name = "l00035" > < / a > < span class = "lineno" > 35< / span > totals[i] = Op::init;< / 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 = "keywordtype" > short< / span > stride = reduction_stride;< / div >
< div class = "line" > < a id = "l00039" name = "l00039" > < / a > < span class = "lineno" > 39< / span > < span class = "keywordtype" > short< / span > size = reduction_size;< / div >
< div class = "line" > < a id = "l00040" name = "l00040" > < / a > < span class = "lineno" > 40< / span > < span class = "keywordtype" > short< / span > blocks = stride / N_READS;< / div >
< div class = "line" > < a id = "l00041" name = "l00041" > < / a > < span class = "lineno" > 41< / span > < span class = "keywordtype" > short< / span > extra = stride - blocks * N_READS;< / div >
< div class = "line" > < a id = "l00042" name = "l00042" > < / a > < span class = "lineno" > 42< / span > < / div >
< div class = "line" > < a id = "l00043" name = "l00043" > < / a > < span class = "lineno" > 43< / span > < span class = "keywordtype" > size_t< / span > out_idx = tid.x + tsize.y * size_t(tid.y);< / div >
< div class = "line" > < a id = "l00044" name = "l00044" > < / a > < span class = "lineno" > 44< / span > in += < a class = "code hl_function" href = "backend_2metal_2kernels_2utils_8h.html#a2e49fa7ab8f6348543455c6c45d7e2a9" > elem_to_loc< / a > (out_idx, shape, strides, ndim);< / div >
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< div class = "line" > < a id = "l00045" name = "l00045" > < / a > < span class = "lineno" > 45< / span > < / div >
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< div class = "line" > < a id = "l00046" name = "l00046" > < / a > < span class = "lineno" > 46< / span > < span class = "keywordflow" > for< / span > (uint r = 0; r < non_col_reductions; r++) {< / div >
< div class = "line" > < a id = "l00047" name = "l00047" > < / a > < span class = "lineno" > 47< / span > row = in + loop.< a class = "code hl_function" href = "structlooped__elem__to__loc.html#accc6d4957a8aeb38f5062754793b74d2" > location< / a > (r, reduce_shape, reduce_strides, reduce_ndim);< / div >
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< div class = "line" > < a id = "l00048" name = "l00048" > < / a > < span class = "lineno" > 48< / span > < / div >
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< div class = "line" > < a id = "l00049" name = "l00049" > < / a > < span class = "lineno" > 49< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > short< / span > i = 0; i < size; i++) {< / div >
< div class = "line" > < a id = "l00050" name = "l00050" > < / a > < span class = "lineno" > 50< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > short< / span > j = 0; j < blocks; j++) {< / div >
< div class = "line" > < a id = "l00051" name = "l00051" > < / a > < span class = "lineno" > 51< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > short< / span > k = 0; k < N_READS; k++) {< / div >
< div class = "line" > < a id = "l00052" name = "l00052" > < / a > < span class = "lineno" > 52< / span > totals[j * N_READS + k] =< / div >
< div class = "line" > < a id = "l00053" name = "l00053" > < / a > < span class = "lineno" > 53< / span > < a class = "code hl_variable" href = "common_2binary_8h.html#a70228731d29946574b238d21fb4b360c" > op< / a > (totals[j * N_READS + k],< / div >
< div class = "line" > < a id = "l00054" name = "l00054" > < / a > < span class = "lineno" > 54< / span > < span class = "keyword" > static_cast< < / span > U< span class = "keyword" > > < / span > (row[i * stride + j * N_READS + k]));< / div >
< div class = "line" > < a id = "l00055" name = "l00055" > < / a > < span class = "lineno" > 55< / span > }< / div >
< div class = "line" > < a id = "l00056" name = "l00056" > < / a > < span class = "lineno" > 56< / span > }< / div >
< div class = "line" > < a id = "l00057" name = "l00057" > < / a > < span class = "lineno" > 57< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > short< / span > k = 0; k < extra; k++) {< / div >
< div class = "line" > < a id = "l00058" name = "l00058" > < / a > < span class = "lineno" > 58< / span > totals[blocks * N_READS + k] =< / div >
< div class = "line" > < a id = "l00059" name = "l00059" > < / a > < span class = "lineno" > 59< / span > < a class = "code hl_variable" href = "common_2binary_8h.html#a70228731d29946574b238d21fb4b360c" > op< / a > (totals[blocks * N_READS + k],< / div >
< div class = "line" > < a id = "l00060" name = "l00060" > < / a > < span class = "lineno" > 60< / span > < span class = "keyword" > static_cast< < / span > U< span class = "keyword" > > < / span > (row[i * stride + blocks * N_READS + k]));< / div >
< div class = "line" > < a id = "l00061" name = "l00061" > < / a > < span class = "lineno" > 61< / span > }< / div >
< div class = "line" > < a id = "l00062" name = "l00062" > < / a > < span class = "lineno" > 62< / span > }< / div >
< div class = "line" > < a id = "l00063" name = "l00063" > < / a > < span class = "lineno" > 63< / span > < / div >
< div class = "line" > < a id = "l00064" name = "l00064" > < / a > < span class = "lineno" > 64< / span > loop.< a class = "code hl_function" href = "structlooped__elem__to__loc.html#a05558dabba889ee0d80ed4b567d901ca" > next< / a > (reduce_shape, reduce_strides);< / div >
< div class = "line" > < a id = "l00065" name = "l00065" > < / a > < span class = "lineno" > 65< / span > }< / div >
< div class = "line" > < a id = "l00066" name = "l00066" > < / a > < span class = "lineno" > 66< / span > out += out_idx * reduction_stride;< / div >
< div class = "line" > < a id = "l00067" name = "l00067" > < / a > < span class = "lineno" > 67< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > short< / span > j = 0; j < stride; j++) {< / div >
< div class = "line" > < a id = "l00068" name = "l00068" > < / a > < span class = "lineno" > 68< / span > out[j] = totals[j];< / div >
< div class = "line" > < a id = "l00069" name = "l00069" > < / a > < span class = "lineno" > 69< / span > }< / div >
< div class = "line" > < a id = "l00070" name = "l00070" > < / a > < span class = "lineno" > 70< / span > }< / div >
< div class = "line" > < a id = "l00071" name = "l00071" > < / a > < span class = "lineno" > 71< / span > < / div >
< div class = "line" > < a id = "l00072" name = "l00072" > < / a > < span class = "lineno" > 72< / span > < span class = "comment" > // Case 2: Long row small column< / span > < / div >
< div class = "line" > < a id = "l00073" name = "l00073" > < / a > < span class = "lineno" > 73< / span > < span class = "keywordflow" > else< / span > < span class = "keywordflow" > if< / span > (reduction_size * non_col_reductions < 32) {< / div >
< div class = "line" > < a id = "l00074" name = "l00074" > < / a > < span class = "lineno" > 74< / span > U totals[N_READS];< / div >
< div class = "line" > < a id = "l00075" name = "l00075" > < / a > < span class = "lineno" > 75< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < N_READS; i++) {< / div >
< div class = "line" > < a id = "l00076" name = "l00076" > < / a > < span class = "lineno" > 76< / span > totals[i] = Op::init;< / div >
< div class = "line" > < a id = "l00077" name = "l00077" > < / a > < span class = "lineno" > 77< / span > }< / div >
< div class = "line" > < a id = "l00078" name = "l00078" > < / a > < span class = "lineno" > 78< / span > < / div >
< div class = "line" > < a id = "l00079" name = "l00079" > < / a > < span class = "lineno" > 79< / span > < span class = "keywordtype" > short< / span > size = reduction_size;< / div >
< div class = "line" > < a id = "l00080" name = "l00080" > < / a > < span class = "lineno" > 80< / span > < span class = "keywordtype" > size_t< / span > offset = size_t(tid.x) * N_READS;< / div >
< div class = "line" > < a id = "l00081" name = "l00081" > < / a > < span class = "lineno" > 81< / span > < span class = "keywordtype" > bool< / span > safe = offset + N_READS < = reduction_stride;< / div >
< div class = "line" > < a id = "l00082" name = "l00082" > < / a > < span class = "lineno" > 82< / span > < span class = "keywordtype" > short< / span > extra = reduction_stride - offset;< / div >
< div class = "line" > < a id = "l00083" name = "l00083" > < / a > < span class = "lineno" > 83< / span > < / div >
< div class = "line" > < a id = "l00084" name = "l00084" > < / a > < span class = "lineno" > 84< / span > < span class = "keywordtype" > size_t< / span > out_idx = tid.y + tsize.z * size_t(tid.z);< / div >
< div class = "line" > < a id = "l00085" name = "l00085" > < / a > < span class = "lineno" > 85< / span > in += < a class = "code hl_function" href = "backend_2metal_2kernels_2utils_8h.html#a2e49fa7ab8f6348543455c6c45d7e2a9" > elem_to_loc< / a > (out_idx, shape, strides, ndim) + offset;< / div >
< div class = "line" > < a id = "l00086" name = "l00086" > < / a > < span class = "lineno" > 86< / span > < / div >
< div class = "line" > < a id = "l00087" name = "l00087" > < / a > < span class = "lineno" > 87< / span > < span class = "keywordflow" > for< / span > (uint r = 0; r < non_col_reductions; r++) {< / div >
< div class = "line" > < a id = "l00088" name = "l00088" > < / a > < span class = "lineno" > 88< / span > row = in + loop.< a class = "code hl_function" href = "structlooped__elem__to__loc.html#accc6d4957a8aeb38f5062754793b74d2" > location< / a > (r, reduce_shape, reduce_strides, reduce_ndim);< / div >
2024-06-07 11:28:06 +08:00
< div class = "line" > < a id = "l00089" name = "l00089" > < / a > < span class = "lineno" > 89< / span > < / div >
2024-08-24 03:14:53 +08:00
< div class = "line" > < a id = "l00090" name = "l00090" > < / a > < span class = "lineno" > 90< / span > < span class = "keywordflow" > if< / span > (safe) {< / div >
< div class = "line" > < a id = "l00091" name = "l00091" > < / a > < span class = "lineno" > 91< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > short< / span > i = 0; i < size; i++) {< / div >
< div class = "line" > < a id = "l00092" name = "l00092" > < / a > < span class = "lineno" > 92< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > short< / span > j = 0; j < N_READS; j++) {< / div >
< div class = "line" > < a id = "l00093" name = "l00093" > < / a > < span class = "lineno" > 93< / span > totals[j] =< / div >
< div class = "line" > < a id = "l00094" name = "l00094" > < / a > < span class = "lineno" > 94< / span > < a class = "code hl_variable" href = "common_2binary_8h.html#a70228731d29946574b238d21fb4b360c" > op< / a > (< span class = "keyword" > static_cast< < / span > U< span class = "keyword" > > < / span > (row[i * reduction_stride + j]), totals[j]);< / div >
< div class = "line" > < a id = "l00095" name = "l00095" > < / a > < span class = "lineno" > 95< / span > }< / div >
< div class = "line" > < a id = "l00096" name = "l00096" > < / a > < span class = "lineno" > 96< / span > }< / div >
< div class = "line" > < a id = "l00097" name = "l00097" > < / a > < span class = "lineno" > 97< / span > } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a id = "l00098" name = "l00098" > < / a > < span class = "lineno" > 98< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > short< / span > i = 0; i < size; i++) {< / div >
< div class = "line" > < a id = "l00099" name = "l00099" > < / a > < span class = "lineno" > 99< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > short< / span > j = 0; j < extra; j++) {< / div >
< div class = "line" > < a id = "l00100" name = "l00100" > < / a > < span class = "lineno" > 100< / span > totals[j] =< / div >
< div class = "line" > < a id = "l00101" name = "l00101" > < / a > < span class = "lineno" > 101< / span > < a class = "code hl_variable" href = "common_2binary_8h.html#a70228731d29946574b238d21fb4b360c" > op< / a > (< span class = "keyword" > static_cast< < / span > U< span class = "keyword" > > < / span > (row[i * reduction_stride + j]), totals[j]);< / div >
< div class = "line" > < a id = "l00102" name = "l00102" > < / a > < span class = "lineno" > 102< / span > }< / div >
< div class = "line" > < a id = "l00103" name = "l00103" > < / a > < span class = "lineno" > 103< / span > }< / div >
< div class = "line" > < a id = "l00104" name = "l00104" > < / a > < span class = "lineno" > 104< / span > }< / div >
< div class = "line" > < a id = "l00105" name = "l00105" > < / a > < span class = "lineno" > 105< / span > < / div >
< div class = "line" > < a id = "l00106" name = "l00106" > < / a > < span class = "lineno" > 106< / span > loop.< a class = "code hl_function" href = "structlooped__elem__to__loc.html#a05558dabba889ee0d80ed4b567d901ca" > next< / a > (reduce_shape, reduce_strides);< / div >
< div class = "line" > < a id = "l00107" name = "l00107" > < / a > < span class = "lineno" > 107< / span > }< / div >
< div class = "line" > < a id = "l00108" name = "l00108" > < / a > < span class = "lineno" > 108< / span > out += out_idx * reduction_stride + offset;< / div >
< div class = "line" > < a id = "l00109" name = "l00109" > < / a > < span class = "lineno" > 109< / span > < span class = "keywordflow" > if< / span > (safe) {< / div >
< div class = "line" > < a id = "l00110" name = "l00110" > < / a > < span class = "lineno" > 110< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > short< / span > i = 0; i < N_READS; i++) {< / div >
< div class = "line" > < a id = "l00111" name = "l00111" > < / a > < span class = "lineno" > 111< / span > out[i] = totals[i];< / div >
< div class = "line" > < a id = "l00112" name = "l00112" > < / a > < span class = "lineno" > 112< / span > }< / div >
< div class = "line" > < a id = "l00113" name = "l00113" > < / a > < span class = "lineno" > 113< / span > } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a id = "l00114" name = "l00114" > < / a > < span class = "lineno" > 114< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > short< / span > i = 0; i < extra; i++) {< / div >
< div class = "line" > < a id = "l00115" name = "l00115" > < / a > < span class = "lineno" > 115< / span > out[i] = totals[i];< / div >
< div class = "line" > < a id = "l00116" name = "l00116" > < / a > < span class = "lineno" > 116< / span > }< / div >
< div class = "line" > < a id = "l00117" name = "l00117" > < / a > < span class = "lineno" > 117< / span > }< / div >
< div class = "line" > < a id = "l00118" name = "l00118" > < / a > < span class = "lineno" > 118< / span > }< / div >
< div class = "line" > < a id = "l00119" name = "l00119" > < / a > < span class = "lineno" > 119< / span > < / div >
< div class = "line" > < a id = "l00120" name = "l00120" > < / a > < span class = "lineno" > 120< / span > < span class = "comment" > // Case 3: Long row medium column< / span > < / div >
< div class = "line" > < a id = "l00121" name = "l00121" > < / a > < span class = "lineno" > 121< / span > < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a id = "l00122" name = "l00122" > < / a > < span class = "lineno" > 122< / span > threadgroup U shared_vals[1024];< / div >
< div class = "line" > < a id = "l00123" name = "l00123" > < / a > < span class = "lineno" > 123< / span > U totals[N_READS];< / div >
< div class = "line" > < a id = "l00124" name = "l00124" > < / a > < span class = "lineno" > 124< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < N_READS; i++) {< / div >
< div class = "line" > < a id = "l00125" name = "l00125" > < / a > < span class = "lineno" > 125< / span > totals[i] = Op::init;< / div >
< div class = "line" > < a id = "l00126" name = "l00126" > < / a > < span class = "lineno" > 126< / span > }< / div >
< div class = "line" > < a id = "l00127" name = "l00127" > < / a > < span class = "lineno" > 127< / span > < / div >
< div class = "line" > < a id = "l00128" name = "l00128" > < / a > < span class = "lineno" > 128< / span > < span class = "keywordtype" > short< / span > stride = reduction_stride;< / div >
< div class = "line" > < a id = "l00129" name = "l00129" > < / a > < span class = "lineno" > 129< / span > < span class = "keywordtype" > short< / span > lid = simd_group_id * < a class = "code hl_variable" href = "backend_2metal_2kernels_2reduction_2ops_8h.html#a515b75d563a93d3c09ee677948dc83e3" > simd_size< / a > + simd_lane_id;< / div >
< div class = "line" > < a id = "l00130" name = "l00130" > < / a > < span class = "lineno" > 130< / span > short2 tile((stride + N_READS - 1) / N_READS, 32);< / div >
< div class = "line" > < a id = "l00131" name = "l00131" > < / a > < span class = "lineno" > 131< / span > short2 offset((lid % tile.x) * N_READS, lid / tile.x);< / div >
< div class = "line" > < a id = "l00132" name = "l00132" > < / a > < span class = "lineno" > 132< / span > < span class = "keywordtype" > short< / span > sm_stride = tile.x * N_READS;< / div >
< div class = "line" > < a id = "l00133" name = "l00133" > < / a > < span class = "lineno" > 133< / span > < span class = "keywordtype" > bool< / span > safe = offset.x + N_READS < = stride;< / div >
< div class = "line" > < a id = "l00134" name = "l00134" > < / a > < span class = "lineno" > 134< / span > < / div >
< div class = "line" > < a id = "l00135" name = "l00135" > < / a > < span class = "lineno" > 135< / span > < span class = "keywordtype" > size_t< / span > out_idx = gid.y + gsize.y * size_t(gid.z);< / div >
< div class = "line" > < a id = "l00136" name = "l00136" > < / a > < span class = "lineno" > 136< / span > in += < a class = "code hl_function" href = "backend_2metal_2kernels_2utils_8h.html#a2e49fa7ab8f6348543455c6c45d7e2a9" > elem_to_loc< / a > (out_idx, shape, strides, ndim) + offset.x;< / div >
< div class = "line" > < a id = "l00137" name = "l00137" > < / a > < span class = "lineno" > 137< / span > < / div >
< div class = "line" > < a id = "l00138" name = "l00138" > < / a > < span class = "lineno" > 138< / span > < span class = "comment" > // Read cooperatively and contiguously and aggregate the partial results.< / span > < / div >
< div class = "line" > < a id = "l00139" name = "l00139" > < / a > < span class = "lineno" > 139< / span > < span class = "keywordtype" > size_t< / span > total = non_col_reductions * reduction_size;< / div >
< div class = "line" > < a id = "l00140" name = "l00140" > < / a > < span class = "lineno" > 140< / span > loop.< a class = "code hl_function" href = "structlooped__elem__to__loc.html#a05558dabba889ee0d80ed4b567d901ca" > next< / a > (offset.y, reduce_shape, reduce_strides);< / div >
< div class = "line" > < a id = "l00141" name = "l00141" > < / a > < span class = "lineno" > 141< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > r = offset.y; r < total; r += < a class = "code hl_variable" href = "backend_2metal_2kernels_2reduction_2ops_8h.html#a515b75d563a93d3c09ee677948dc83e3" > simd_size< / a > ) {< / div >
< div class = "line" > < a id = "l00142" name = "l00142" > < / a > < span class = "lineno" > 142< / span > row = in + loop.< a class = "code hl_function" href = "structlooped__elem__to__loc.html#accc6d4957a8aeb38f5062754793b74d2" > location< / a > (r, reduce_shape, reduce_strides, reduce_ndim);< / div >
< div class = "line" > < a id = "l00143" name = "l00143" > < / a > < span class = "lineno" > 143< / span > < / div >
< div class = "line" > < a id = "l00144" name = "l00144" > < / a > < span class = "lineno" > 144< / span > < span class = "keywordflow" > if< / span > (safe) {< / div >
< div class = "line" > < a id = "l00145" name = "l00145" > < / a > < span class = "lineno" > 145< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < N_READS; i++) {< / div >
< div class = "line" > < a id = "l00146" name = "l00146" > < / a > < span class = "lineno" > 146< / span > totals[i] = < a class = "code hl_variable" href = "common_2binary_8h.html#a70228731d29946574b238d21fb4b360c" > op< / a > (< span class = "keyword" > static_cast< < / span > U< span class = "keyword" > > < / span > (row[i]), totals[i]);< / div >
< div class = "line" > < a id = "l00147" name = "l00147" > < / a > < span class = "lineno" > 147< / span > }< / div >
< div class = "line" > < a id = "l00148" name = "l00148" > < / a > < span class = "lineno" > 148< / span > } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a id = "l00149" name = "l00149" > < / a > < span class = "lineno" > 149< / span > U vals[N_READS];< / div >
< div class = "line" > < a id = "l00150" name = "l00150" > < / a > < span class = "lineno" > 150< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < N_READS; i++) {< / div >
< div class = "line" > < a id = "l00151" name = "l00151" > < / a > < span class = "lineno" > 151< / span > vals[i] = (offset.x + i < stride) ? static_cast< U> (row[i]) : < a class = "code hl_variable" href = "common_2binary_8h.html#a70228731d29946574b238d21fb4b360c" > op< / a > .init;< / div >
< div class = "line" > < a id = "l00152" name = "l00152" > < / a > < span class = "lineno" > 152< / span > }< / div >
< div class = "line" > < a id = "l00153" name = "l00153" > < / a > < span class = "lineno" > 153< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < N_READS; i++) {< / div >
< div class = "line" > < a id = "l00154" name = "l00154" > < / a > < span class = "lineno" > 154< / span > totals[i] = < a class = "code hl_variable" href = "common_2binary_8h.html#a70228731d29946574b238d21fb4b360c" > op< / a > (vals[i], totals[i]);< / div >
< div class = "line" > < a id = "l00155" name = "l00155" > < / a > < span class = "lineno" > 155< / span > }< / div >
< div class = "line" > < a id = "l00156" name = "l00156" > < / a > < span class = "lineno" > 156< / span > }< / div >
< div class = "line" > < a id = "l00157" name = "l00157" > < / a > < span class = "lineno" > 157< / span > < / div >
< div class = "line" > < a id = "l00158" name = "l00158" > < / a > < span class = "lineno" > 158< / span > loop.< a class = "code hl_function" href = "structlooped__elem__to__loc.html#a05558dabba889ee0d80ed4b567d901ca" > next< / a > (< a class = "code hl_variable" href = "backend_2metal_2kernels_2reduction_2ops_8h.html#a515b75d563a93d3c09ee677948dc83e3" > simd_size< / a > , reduce_shape, reduce_strides);< / div >
< div class = "line" > < a id = "l00159" name = "l00159" > < / a > < span class = "lineno" > 159< / span > }< / div >
< div class = "line" > < a id = "l00160" name = "l00160" > < / a > < span class = "lineno" > 160< / span > < / div >
< div class = "line" > < a id = "l00161" name = "l00161" > < / a > < span class = "lineno" > 161< / span > < span class = "comment" > // Each thread holds N_READS partial results but the simdgroups are not< / span > < / div >
< div class = "line" > < a id = "l00162" name = "l00162" > < / a > < span class = "lineno" > 162< / span > < span class = "comment" > // aligned to do the reduction across the simdgroup so we write our results< / span > < / div >
< div class = "line" > < a id = "l00163" name = "l00163" > < / a > < span class = "lineno" > 163< / span > < span class = "comment" > // in the shared memory and read them back according to the simdgroup.< / span > < / div >
< div class = "line" > < a id = "l00164" name = "l00164" > < / a > < span class = "lineno" > 164< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < N_READS; i++) {< / div >
< div class = "line" > < a id = "l00165" name = "l00165" > < / a > < span class = "lineno" > 165< / span > shared_vals[offset.y * sm_stride + offset.x + i] = totals[i];< / div >
< div class = "line" > < a id = "l00166" name = "l00166" > < / a > < span class = "lineno" > 166< / span > }< / div >
< div class = "line" > < a id = "l00167" name = "l00167" > < / a > < span class = "lineno" > 167< / span > threadgroup_barrier(mem_flags::mem_threadgroup);< / div >
< div class = "line" > < a id = "l00168" name = "l00168" > < / a > < span class = "lineno" > 168< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < N_READS; i++) {< / div >
< div class = "line" > < a id = "l00169" name = "l00169" > < / a > < span class = "lineno" > 169< / span > totals[i] = < a class = "code hl_variable" href = "common_2binary_8h.html#a70228731d29946574b238d21fb4b360c" > op< / a > .simd_reduce(< / div >
< div class = "line" > < a id = "l00170" name = "l00170" > < / a > < span class = "lineno" > 170< / span > shared_vals[simd_lane_id * sm_stride + simd_group_id * N_READS + i]);< / div >
< div class = "line" > < a id = "l00171" name = "l00171" > < / a > < span class = "lineno" > 171< / span > }< / div >
< div class = "line" > < a id = "l00172" name = "l00172" > < / a > < span class = "lineno" > 172< / span > < / div >
< div class = "line" > < a id = "l00173" name = "l00173" > < / a > < span class = "lineno" > 173< / span > < span class = "comment" > // Write the output.< / span > < / div >
< div class = "line" > < a id = "l00174" name = "l00174" > < / a > < span class = "lineno" > 174< / span > < span class = "keywordflow" > if< / span > (simd_lane_id == 0) {< / div >
< div class = "line" > < a id = "l00175" name = "l00175" > < / a > < span class = "lineno" > 175< / span > < span class = "keywordtype" > short< / span > column = simd_group_id * N_READS;< / div >
< div class = "line" > < a id = "l00176" name = "l00176" > < / a > < span class = "lineno" > 176< / span > out += out_idx * reduction_stride + column;< / div >
< div class = "line" > < a id = "l00177" name = "l00177" > < / a > < span class = "lineno" > 177< / span > < span class = "keywordflow" > if< / span > (column + N_READS < = stride) {< / div >
< div class = "line" > < a id = "l00178" name = "l00178" > < / a > < span class = "lineno" > 178< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < N_READS; i++) {< / div >
< div class = "line" > < a id = "l00179" name = "l00179" > < / a > < span class = "lineno" > 179< / span > out[i] = totals[i];< / div >
< div class = "line" > < a id = "l00180" name = "l00180" > < / a > < span class = "lineno" > 180< / span > }< / div >
< div class = "line" > < a id = "l00181" name = "l00181" > < / a > < span class = "lineno" > 181< / span > } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a id = "l00182" name = "l00182" > < / a > < span class = "lineno" > 182< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; column + i < stride; i++) {< / div >
< div class = "line" > < a id = "l00183" name = "l00183" > < / a > < span class = "lineno" > 183< / span > out[i] = totals[i];< / div >
< div class = "line" > < a id = "l00184" name = "l00184" > < / a > < span class = "lineno" > 184< / span > }< / div >
< div class = "line" > < a id = "l00185" name = "l00185" > < / a > < span class = "lineno" > 185< / span > }< / div >
< div class = "line" > < a id = "l00186" name = "l00186" > < / a > < span class = "lineno" > 186< / span > }< / div >
< div class = "line" > < a id = "l00187" name = "l00187" > < / a > < span class = "lineno" > 187< / span > }< / div >
< div class = "line" > < a id = "l00188" name = "l00188" > < / a > < span class = "lineno" > 188< / span > }< / div >
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< / div >
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< div class = "line" > < a id = "l00189" name = "l00189" > < / a > < span class = "lineno" > 189< / span > < / div >
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< div class = "line" > < a id = "l00201" name = "l00201" > < / a > < span class = "lineno" > 201< / span > < span class = "keyword" > template< / span > < < span class = "keyword" > typename< / span > T, < span class = "keyword" > typename< / span > U, < span class = "keyword" > typename< / span > Op, < span class = "keywordtype" > int< / span > NDIMS, < span class = "keywordtype" > int< / span > BM, < span class = "keywordtype" > int< / span > BN> < / div >
< div class = "foldopen" id = "foldopen00202" data-start = "{" data-end = "}" >
< div class = "line" > < a id = "l00202" name = "l00202" > < / a > < span class = "lineno" > < a class = "line" href = "reduce__col_8h.html#a11bfc6112ae2386ac03f5ea7b7d93385" > 202< / a > < / span > [[kernel]] < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "reduce__col_8h.html#a11bfc6112ae2386ac03f5ea7b7d93385" > col_reduce_looped< / a > (< / div >
< div class = "line" > < a id = "l00203" name = "l00203" > < / a > < span class = "lineno" > 203< / span > < span class = "keyword" > const< / span > device T* in [[buffer(0)]],< / div >
< div class = "line" > < a id = "l00204" name = "l00204" > < / a > < span class = "lineno" > 204< / span > device U* out [[buffer(1)]],< / div >
< div class = "line" > < a id = "l00205" name = "l00205" > < / a > < span class = "lineno" > 205< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > size_t< / span > & reduction_size [[buffer(2)]],< / div >
< div class = "line" > < a id = "l00206" name = "l00206" > < / a > < span class = "lineno" > 206< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > size_t< / span > & reduction_stride [[buffer(3)]],< / div >
< div class = "line" > < a id = "l00207" name = "l00207" > < / a > < span class = "lineno" > 207< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > int< / span > * shape [[buffer(4)]],< / div >
< div class = "line" > < a id = "l00208" name = "l00208" > < / a > < span class = "lineno" > 208< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > size_t< / span > * strides [[buffer(5)]],< / div >
< div class = "line" > < a id = "l00209" name = "l00209" > < / a > < span class = "lineno" > 209< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > int< / span > & ndim [[buffer(6)]],< / div >
< div class = "line" > < a id = "l00210" name = "l00210" > < / a > < span class = "lineno" > 210< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > int< / span > * reduce_shape [[buffer(7)]],< / div >
< div class = "line" > < a id = "l00211" name = "l00211" > < / a > < span class = "lineno" > 211< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > size_t< / span > * reduce_strides [[buffer(8)]],< / div >
< div class = "line" > < a id = "l00212" name = "l00212" > < / a > < span class = "lineno" > 212< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > int< / span > & reduce_ndim [[buffer(9)]],< / div >
< div class = "line" > < a id = "l00213" name = "l00213" > < / a > < span class = "lineno" > 213< / span > < span class = "keyword" > const< / span > constant < span class = "keywordtype" > size_t< / span > & non_col_reductions [[buffer(10)]],< / div >
< div class = "line" > < a id = "l00214" name = "l00214" > < / a > < span class = "lineno" > 214< / span > uint3 gid [[threadgroup_position_in_grid]],< / div >
< div class = "line" > < a id = "l00215" name = "l00215" > < / a > < span class = "lineno" > 215< / span > uint3 gsize [[threadgroups_per_grid]],< / div >
< div class = "line" > < a id = "l00216" name = "l00216" > < / a > < span class = "lineno" > 216< / span > uint simd_lane_id [[thread_index_in_simdgroup]],< / div >
< div class = "line" > < a id = "l00217" name = "l00217" > < / a > < span class = "lineno" > 217< / span > uint simd_group_id [[simdgroup_index_in_threadgroup]]) {< / div >
< div class = "line" > < a id = "l00218" name = "l00218" > < / a > < span class = "lineno" > 218< / span > Op < a class = "code hl_variable" href = "common_2binary_8h.html#a70228731d29946574b238d21fb4b360c" > op< / a > ;< / div >
< div class = "line" > < a id = "l00219" name = "l00219" > < / a > < span class = "lineno" > 219< / span > < span class = "keyword" > constexpr< / span > < span class = "keywordtype" > int< / span > n_simdgroups = 4;< / div >
< div class = "line" > < a id = "l00220" name = "l00220" > < / a > < span class = "lineno" > 220< / span > < span class = "keyword" > constexpr< / span > < span class = "keywordtype" > short< / span > tgp_size = n_simdgroups * < a class = "code hl_variable" href = "backend_2metal_2kernels_2reduction_2ops_8h.html#a515b75d563a93d3c09ee677948dc83e3" > simd_size< / a > ;< / div >
< div class = "line" > < a id = "l00221" name = "l00221" > < / a > < span class = "lineno" > 221< / span > < span class = "keyword" > constexpr< / span > < span class = "keywordtype" > short< / span > n_reads = (BM * BN) / tgp_size;< / div >
< div class = "line" > < a id = "l00222" name = "l00222" > < / a > < span class = "lineno" > 222< / span > < span class = "keyword" > constexpr< / span > < span class = "keywordtype" > short< / span > n_read_blocks = BN / n_reads;< / div >
< div class = "line" > < a id = "l00223" name = "l00223" > < / a > < span class = "lineno" > 223< / span > < / div >
< div class = "line" > < a id = "l00224" name = "l00224" > < / a > < span class = "lineno" > 224< / span > threadgroup U shared_vals[BN * BM];< / div >
< div class = "line" > < a id = "l00225" name = "l00225" > < / a > < span class = "lineno" > 225< / span > U totals[n_reads];< / div >
< div class = "line" > < a id = "l00226" name = "l00226" > < / a > < span class = "lineno" > 226< / span > < a class = "code hl_struct" href = "structlooped__elem__to__loc.html" > looped_elem_to_loc< NDIMS> < / a > loop;< / div >
< div class = "line" > < a id = "l00227" name = "l00227" > < / a > < span class = "lineno" > 227< / span > < span class = "keyword" > const< / span > device T* row;< / div >
< div class = "line" > < a id = "l00228" name = "l00228" > < / a > < span class = "lineno" > 228< / span > < / div >
< div class = "line" > < a id = "l00229" name = "l00229" > < / a > < span class = "lineno" > 229< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < n_reads; i++) {< / div >
< div class = "line" > < a id = "l00230" name = "l00230" > < / a > < span class = "lineno" > 230< / span > totals[i] = Op::init;< / div >
< div class = "line" > < a id = "l00231" name = "l00231" > < / a > < span class = "lineno" > 231< / span > }< / div >
< div class = "line" > < a id = "l00232" name = "l00232" > < / a > < span class = "lineno" > 232< / span > < / div >
< div class = "line" > < a id = "l00233" name = "l00233" > < / a > < span class = "lineno" > 233< / span > < span class = "keywordtype" > short< / span > lid = simd_group_id * < a class = "code hl_variable" href = "backend_2metal_2kernels_2reduction_2ops_8h.html#a515b75d563a93d3c09ee677948dc83e3" > simd_size< / a > + simd_lane_id;< / div >
< div class = "line" > < a id = "l00234" name = "l00234" > < / a > < span class = "lineno" > 234< / span > short2 offset((lid % n_read_blocks) * n_reads, lid / n_read_blocks);< / div >
< div class = "line" > < a id = "l00235" name = "l00235" > < / a > < span class = "lineno" > 235< / span > < span class = "keywordtype" > size_t< / span > column = BN * gid.x + offset.x;< / div >
< div class = "line" > < a id = "l00236" name = "l00236" > < / a > < span class = "lineno" > 236< / span > < span class = "keywordtype" > bool< / span > safe = column + n_reads < = reduction_stride;< / div >
< div class = "line" > < a id = "l00237" name = "l00237" > < / a > < span class = "lineno" > 237< / span > < / div >
< div class = "line" > < a id = "l00238" name = "l00238" > < / a > < span class = "lineno" > 238< / span > < span class = "keywordtype" > size_t< / span > out_idx = gid.y + gsize.y * size_t(gid.z);< / div >
< div class = "line" > < a id = "l00239" name = "l00239" > < / a > < span class = "lineno" > 239< / span > < span class = "keywordtype" > size_t< / span > in_idx = < a class = "code hl_function" href = "backend_2metal_2kernels_2utils_8h.html#a2e49fa7ab8f6348543455c6c45d7e2a9" > elem_to_loc< / a > (out_idx, shape, strides, ndim);< / div >
< div class = "line" > < a id = "l00240" name = "l00240" > < / a > < span class = "lineno" > 240< / span > in += in_idx + column;< / div >
< div class = "line" > < a id = "l00241" name = "l00241" > < / a > < span class = "lineno" > 241< / span > < / div >
< div class = "line" > < a id = "l00242" name = "l00242" > < / a > < span class = "lineno" > 242< / span > < span class = "keywordtype" > size_t< / span > total = non_col_reductions * reduction_size;< / div >
< div class = "line" > < a id = "l00243" name = "l00243" > < / a > < span class = "lineno" > 243< / span > loop.< a class = "code hl_function" href = "structlooped__elem__to__loc.html#a05558dabba889ee0d80ed4b567d901ca" > next< / a > (offset.y, reduce_shape, reduce_strides);< / div >
< div class = "line" > < a id = "l00244" name = "l00244" > < / a > < span class = "lineno" > 244< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > r = offset.y; r < total; r += BM) {< / div >
< div class = "line" > < a id = "l00245" name = "l00245" > < / a > < span class = "lineno" > 245< / span > row = in + loop.< a class = "code hl_function" href = "structlooped__elem__to__loc.html#accc6d4957a8aeb38f5062754793b74d2" > location< / a > (r, reduce_shape, reduce_strides, reduce_ndim);< / div >
< div class = "line" > < a id = "l00246" name = "l00246" > < / a > < span class = "lineno" > 246< / span > < / div >
< div class = "line" > < a id = "l00247" name = "l00247" > < / a > < span class = "lineno" > 247< / span > < span class = "keywordflow" > if< / span > (safe) {< / div >
< div class = "line" > < a id = "l00248" name = "l00248" > < / a > < span class = "lineno" > 248< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < n_reads; i++) {< / div >
< div class = "line" > < a id = "l00249" name = "l00249" > < / a > < span class = "lineno" > 249< / span > totals[i] = < a class = "code hl_variable" href = "common_2binary_8h.html#a70228731d29946574b238d21fb4b360c" > op< / a > (< span class = "keyword" > static_cast< < / span > U< span class = "keyword" > > < / span > (row[i]), totals[i]);< / div >
< div class = "line" > < a id = "l00250" name = "l00250" > < / a > < span class = "lineno" > 250< / span > }< / div >
< div class = "line" > < a id = "l00251" name = "l00251" > < / a > < span class = "lineno" > 251< / span > } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a id = "l00252" name = "l00252" > < / a > < span class = "lineno" > 252< / span > U vals[n_reads];< / div >
< div class = "line" > < a id = "l00253" name = "l00253" > < / a > < span class = "lineno" > 253< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < n_reads; i++) {< / div >
< div class = "line" > < a id = "l00254" name = "l00254" > < / a > < span class = "lineno" > 254< / span > vals[i] =< / div >
< div class = "line" > < a id = "l00255" name = "l00255" > < / a > < span class = "lineno" > 255< / span > (column + i < reduction_stride) ? static_cast< U> (row[i]) : < a class = "code hl_variable" href = "common_2binary_8h.html#a70228731d29946574b238d21fb4b360c" > op< / a > .init;< / div >
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< div class = "line" > < a id = "l00256" name = "l00256" > < / a > < span class = "lineno" > 256< / span > }< / div >
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< div class = "line" > < a id = "l00257" name = "l00257" > < / a > < span class = "lineno" > 257< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < n_reads; i++) {< / div >
< div class = "line" > < a id = "l00258" name = "l00258" > < / a > < span class = "lineno" > 258< / span > totals[i] = < a class = "code hl_variable" href = "common_2binary_8h.html#a70228731d29946574b238d21fb4b360c" > op< / a > (vals[i], totals[i]);< / div >
< div class = "line" > < a id = "l00259" name = "l00259" > < / a > < span class = "lineno" > 259< / span > }< / div >
< div class = "line" > < a id = "l00260" name = "l00260" > < / a > < span class = "lineno" > 260< / span > }< / div >
< div class = "line" > < a id = "l00261" name = "l00261" > < / a > < span class = "lineno" > 261< / span > < / div >
< div class = "line" > < a id = "l00262" name = "l00262" > < / a > < span class = "lineno" > 262< / span > loop.< a class = "code hl_function" href = "structlooped__elem__to__loc.html#a05558dabba889ee0d80ed4b567d901ca" > next< / a > (BM, reduce_shape, reduce_strides);< / div >
< div class = "line" > < a id = "l00263" name = "l00263" > < / a > < span class = "lineno" > 263< / span > }< / div >
< div class = "line" > < a id = "l00264" name = "l00264" > < / a > < span class = "lineno" > 264< / span > < / div >
< div class = "line" > < a id = "l00265" name = "l00265" > < / a > < span class = "lineno" > 265< / span > < span class = "comment" > // We can use a simd reduction to accumulate across BM so each thread writes< / span > < / div >
< div class = "line" > < a id = "l00266" name = "l00266" > < / a > < span class = "lineno" > 266< / span > < span class = "comment" > // the partial output to SM and then each simdgroup does BN / n_simdgroups< / span > < / div >
< div class = "line" > < a id = "l00267" name = "l00267" > < / a > < span class = "lineno" > 267< / span > < span class = "comment" > // accumulations.< / span > < / div >
< div class = "line" > < a id = "l00268" name = "l00268" > < / a > < span class = "lineno" > 268< / span > < span class = "keywordflow" > if< / span > (BM == 32) {< / div >
< div class = "line" > < a id = "l00269" name = "l00269" > < / a > < span class = "lineno" > 269< / span > < span class = "keyword" > constexpr< / span > < span class = "keywordtype" > int< / span > n_outputs = BN / n_simdgroups;< / div >
< div class = "line" > < a id = "l00270" name = "l00270" > < / a > < span class = "lineno" > 270< / span > < span class = "keyword" > static_assert< / span > (< / div >
< div class = "line" > < a id = "l00271" name = "l00271" > < / a > < span class = "lineno" > 271< / span > BM != 32 || n_outputs == n_reads,< / div >
< div class = "line" > < a id = "l00272" name = "l00272" > < / a > < span class = "lineno" > 272< / span > < span class = "stringliteral" > " The tile should be selected such that n_outputs == n_reads" < / span > );< / div >
< div class = "line" > < a id = "l00273" name = "l00273" > < / a > < span class = "lineno" > 273< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < n_reads; i++) {< / div >
< div class = "line" > < a id = "l00274" name = "l00274" > < / a > < span class = "lineno" > 274< / span > shared_vals[offset.y * BN + offset.x + i] = totals[i];< / div >
< div class = "line" > < a id = "l00275" name = "l00275" > < / a > < span class = "lineno" > 275< / span > }< / div >
< div class = "line" > < a id = "l00276" name = "l00276" > < / a > < span class = "lineno" > 276< / span > threadgroup_barrier(mem_flags::mem_threadgroup);< / div >
< div class = "line" > < a id = "l00277" name = "l00277" > < / a > < span class = "lineno" > 277< / span > short2 out_offset(simd_group_id * n_outputs, simd_lane_id);< / div >
< div class = "line" > < a id = "l00278" name = "l00278" > < / a > < span class = "lineno" > 278< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < n_outputs; i++) {< / div >
< div class = "line" > < a id = "l00279" name = "l00279" > < / a > < span class = "lineno" > 279< / span > totals[i] =< / div >
< div class = "line" > < a id = "l00280" name = "l00280" > < / a > < span class = "lineno" > 280< / span > < a class = "code hl_variable" href = "common_2binary_8h.html#a70228731d29946574b238d21fb4b360c" > op< / a > .simd_reduce(shared_vals[out_offset.y * BN + out_offset.x + i]);< / div >
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< div class = "line" > < a id = "l00281" name = "l00281" > < / a > < span class = "lineno" > 281< / span > }< / div >
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< div class = "line" > < a id = "l00282" name = "l00282" > < / a > < span class = "lineno" > 282< / span > < / div >
< div class = "line" > < a id = "l00283" name = "l00283" > < / a > < span class = "lineno" > 283< / span > < span class = "comment" > // Write the output.< / span > < / div >
< div class = "line" > < a id = "l00284" name = "l00284" > < / a > < span class = "lineno" > 284< / span > < span class = "keywordflow" > if< / span > (simd_lane_id == 0) {< / div >
< div class = "line" > < a id = "l00285" name = "l00285" > < / a > < span class = "lineno" > 285< / span > < span class = "keywordtype" > size_t< / span > out_column = BN * gid.x + out_offset.x;< / div >
< div class = "line" > < a id = "l00286" name = "l00286" > < / a > < span class = "lineno" > 286< / span > out += out_idx * reduction_stride + out_column;< / div >
< div class = "line" > < a id = "l00287" name = "l00287" > < / a > < span class = "lineno" > 287< / span > < span class = "keywordflow" > if< / span > (out_column + n_outputs < = reduction_stride) {< / div >
< div class = "line" > < a id = "l00288" name = "l00288" > < / a > < span class = "lineno" > 288< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < n_outputs; i++) {< / div >
< div class = "line" > < a id = "l00289" name = "l00289" > < / a > < span class = "lineno" > 289< / span > out[i] = totals[i];< / div >
< div class = "line" > < a id = "l00290" name = "l00290" > < / a > < span class = "lineno" > 290< / span > }< / div >
< div class = "line" > < a id = "l00291" name = "l00291" > < / a > < span class = "lineno" > 291< / span > } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a id = "l00292" name = "l00292" > < / a > < span class = "lineno" > 292< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; out_column + i < reduction_stride; i++) {< / div >
< div class = "line" > < a id = "l00293" name = "l00293" > < / a > < span class = "lineno" > 293< / span > out[i] = totals[i];< / div >
< div class = "line" > < a id = "l00294" name = "l00294" > < / a > < span class = "lineno" > 294< / span > }< / div >
< div class = "line" > < a id = "l00295" name = "l00295" > < / a > < span class = "lineno" > 295< / span > }< / div >
< div class = "line" > < a id = "l00296" name = "l00296" > < / a > < span class = "lineno" > 296< / span > }< / div >
< div class = "line" > < a id = "l00297" name = "l00297" > < / a > < span class = "lineno" > 297< / span > }< / div >
< div class = "line" > < a id = "l00298" name = "l00298" > < / a > < span class = "lineno" > 298< / span > < / div >
< div class = "line" > < a id = "l00299" name = "l00299" > < / a > < span class = "lineno" > 299< / span > < span class = "comment" > // Each thread holds n_reads partial results. We write them all out to shared< / span > < / div >
< div class = "line" > < a id = "l00300" name = "l00300" > < / a > < span class = "lineno" > 300< / span > < span class = "comment" > // memory and threads with offset.y == 0 aggregate the columns and write the< / span > < / div >
< div class = "line" > < a id = "l00301" name = "l00301" > < / a > < span class = "lineno" > 301< / span > < span class = "comment" > // outputs.< / span > < / div >
< div class = "line" > < a id = "l00302" name = "l00302" > < / a > < span class = "lineno" > 302< / span > < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a id = "l00303" name = "l00303" > < / a > < span class = "lineno" > 303< / span > < span class = "keywordtype" > short< / span > x_block = offset.x / n_reads;< / div >
< div class = "line" > < a id = "l00304" name = "l00304" > < / a > < span class = "lineno" > 304< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < n_reads; i++) {< / div >
< div class = "line" > < a id = "l00305" name = "l00305" > < / a > < span class = "lineno" > 305< / span > shared_vals[x_block * BM * n_reads + i * BM + offset.y] = totals[i];< / div >
< div class = "line" > < a id = "l00306" name = "l00306" > < / a > < span class = "lineno" > 306< / span > }< / div >
< div class = "line" > < a id = "l00307" name = "l00307" > < / a > < span class = "lineno" > 307< / span > threadgroup_barrier(mem_flags::mem_threadgroup);< / div >
< div class = "line" > < a id = "l00308" name = "l00308" > < / a > < span class = "lineno" > 308< / span > < span class = "keywordflow" > if< / span > (offset.y == 0) {< / div >
< div class = "line" > < a id = "l00309" name = "l00309" > < / a > < span class = "lineno" > 309< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < n_reads; i++) {< / div >
< div class = "line" > < a id = "l00310" name = "l00310" > < / a > < span class = "lineno" > 310< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > j = 1; j < BM; j++) {< / div >
< div class = "line" > < a id = "l00311" name = "l00311" > < / a > < span class = "lineno" > 311< / span > totals[i] =< / div >
< div class = "line" > < a id = "l00312" name = "l00312" > < / a > < span class = "lineno" > 312< / span > < a class = "code hl_variable" href = "common_2binary_8h.html#a70228731d29946574b238d21fb4b360c" > op< / a > (shared_vals[x_block * BM * n_reads + i * BM + j], totals[i]);< / div >
< div class = "line" > < a id = "l00313" name = "l00313" > < / a > < span class = "lineno" > 313< / span > }< / div >
< div class = "line" > < a id = "l00314" name = "l00314" > < / a > < span class = "lineno" > 314< / span > }< / div >
< div class = "line" > < a id = "l00315" name = "l00315" > < / a > < span class = "lineno" > 315< / span > }< / div >
< div class = "line" > < a id = "l00316" name = "l00316" > < / a > < span class = "lineno" > 316< / span > < / div >
< div class = "line" > < a id = "l00317" name = "l00317" > < / a > < span class = "lineno" > 317< / span > < span class = "comment" > // Write the output.< / span > < / div >
< div class = "line" > < a id = "l00318" name = "l00318" > < / a > < span class = "lineno" > 318< / span > < span class = "keywordflow" > if< / span > (offset.y == 0) {< / div >
< div class = "line" > < a id = "l00319" name = "l00319" > < / a > < span class = "lineno" > 319< / span > out += out_idx * reduction_stride + column;< / div >
< div class = "line" > < a id = "l00320" name = "l00320" > < / a > < span class = "lineno" > 320< / span > < span class = "keywordflow" > if< / span > (safe) {< / div >
< div class = "line" > < a id = "l00321" name = "l00321" > < / a > < span class = "lineno" > 321< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < n_reads; i++) {< / div >
< div class = "line" > < a id = "l00322" name = "l00322" > < / a > < span class = "lineno" > 322< / span > out[i] = totals[i];< / div >
< div class = "line" > < a id = "l00323" name = "l00323" > < / a > < span class = "lineno" > 323< / span > }< / div >
< div class = "line" > < a id = "l00324" name = "l00324" > < / a > < span class = "lineno" > 324< / span > } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a id = "l00325" name = "l00325" > < / a > < span class = "lineno" > 325< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; column + i < reduction_stride; i++) {< / div >
< div class = "line" > < a id = "l00326" name = "l00326" > < / a > < span class = "lineno" > 326< / span > out[i] = totals[i];< / div >
< div class = "line" > < a id = "l00327" name = "l00327" > < / a > < span class = "lineno" > 327< / span > }< / div >
< div class = "line" > < a id = "l00328" name = "l00328" > < / a > < span class = "lineno" > 328< / span > }< / div >
< div class = "line" > < a id = "l00329" name = "l00329" > < / a > < span class = "lineno" > 329< / span > }< / div >
< div class = "line" > < a id = "l00330" name = "l00330" > < / a > < span class = "lineno" > 330< / span > }< / div >
< div class = "line" > < a id = "l00331" name = "l00331" > < / a > < span class = "lineno" > 331< / span > }< / div >
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< / div >
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< div class = "ttc" id = "abackend_2metal_2kernels_2reduction_2ops_8h_html_a515b75d563a93d3c09ee677948dc83e3" > < div class = "ttname" > < a href = "backend_2metal_2kernels_2reduction_2ops_8h.html#a515b75d563a93d3c09ee677948dc83e3" > simd_size< / a > < / div > < div class = "ttdeci" > static constant constexpr const uint8_t simd_size< / div > < div class = "ttdef" > < b > Definition< / b > ops.h:22< / div > < / div >
< div class = "ttc" id = "abackend_2metal_2kernels_2utils_8h_html_a2e49fa7ab8f6348543455c6c45d7e2a9" > < div class = "ttname" > < a href = "backend_2metal_2kernels_2utils_8h.html#a2e49fa7ab8f6348543455c6c45d7e2a9" > elem_to_loc< / a > < / div > < div class = "ttdeci" > METAL_FUNC stride_t elem_to_loc(uint elem, device const int *shape, device const stride_t *strides, int ndim)< / div > < div class = "ttdef" > < b > Definition< / b > utils.h:87< / 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:141< / div > < / div >
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< div class = "ttc" id = "adefines_8h_html_a2ad505864a2ab786147766900bc18c21" > < div class = "ttname" > < a href = "defines_8h.html#a2ad505864a2ab786147766900bc18c21" > REDUCE_N_READS< / a > < / div > < div class = "ttdeci" > static constexpr int REDUCE_N_READS< / div > < div class = "ttdef" > < b > Definition< / b > defines.h:12< / div > < / div >
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< div class = "ttc" id = "areduce__col_8h_html_a11bfc6112ae2386ac03f5ea7b7d93385" > < div class = "ttname" > < a href = "reduce__col_8h.html#a11bfc6112ae2386ac03f5ea7b7d93385" > col_reduce_looped< / a > < / div > < div class = "ttdeci" > void col_reduce_looped(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 size_t *strides, const constant int & ndim, const constant int *reduce_shape, const constant size_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)< / div > < div class = "ttdoc" > Our approach is the following simple looped approach:< / div > < div class = "ttdef" > < b > Definition< / b > reduce_col.h:202< / div > < / div >
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< div class = "ttc" id = "areduce__col_8h_html_adf7aeb18cd1d5042cf6d9b46b582d8ce" > < div class = "ttname" > < a href = "reduce__col_8h.html#adf7aeb18cd1d5042cf6d9b46b582d8ce" > col_reduce_small< / a > < / div > < div class = "ttdeci" > void col_reduce_small(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 size_t *strides, const constant int & ndim, const constant int *reduce_shape, const constant size_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, uint3 tid, uint3 tsize)< / div > < div class = "ttdef" > < b > Definition< / b > reduce_col.h:9< / div > < / div >
< div class = "ttc" id = "astructlooped__elem__to__loc_html" > < div class = "ttname" > < a href = "structlooped__elem__to__loc.html" > looped_elem_to_loc< / a > < / div > < div class = "ttdef" > < b > Definition< / b > utils.h:334< / div > < / div >
< div class = "ttc" id = "astructlooped__elem__to__loc_html_a05558dabba889ee0d80ed4b567d901ca" > < div class = "ttname" > < a href = "structlooped__elem__to__loc.html#a05558dabba889ee0d80ed4b567d901ca" > looped_elem_to_loc::next< / a > < / div > < div class = "ttdeci" > void next(const constant int *shape, const constant size_t *strides)< / div > < div class = "ttdef" > < b > Definition< / b > utils.h:339< / div > < / div >
< div class = "ttc" id = "astructlooped__elem__to__loc_html_accc6d4957a8aeb38f5062754793b74d2" > < div class = "ttname" > < a href = "structlooped__elem__to__loc.html#accc6d4957a8aeb38f5062754793b74d2" > looped_elem_to_loc::location< / a > < / div > < div class = "ttdeci" > offset_t location(offset_t, const constant int *, const constant size_t *, int)< / div > < div class = "ttdef" > < b > Definition< / b > utils.h:366< / div > < / div >
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