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[AUTOGENERATED] [release/2.8] [ROCm] OffsetCalc Unroll Optimization #2598

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Merged
merged 1 commit into from
Sep 3, 2025
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[AUTOGENERATED] [release/2.8] [ROCm] OffsetCalc Unroll Optimization #2598

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18 changes: 18 additions & 0 deletions aten/src/ATen/cuda/detail/OffsetCalculator.cuh
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Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,24 @@ struct OffsetCalculator {

C10_HOST_DEVICE offset_type get(index_t linear_idx) const {
offset_type offsets;

#if defined(USE_ROCM)
if ((dims > 0) && (dims <= 2)) {
auto divmod = sizes_[0].divmod(linear_idx);
#pragma unroll
for (int arg = 0; arg < NARGS; arg++)
offsets[arg] = divmod.mod * strides_[0][arg];
if (dims >= 2) {
divmod = sizes_[1].divmod(divmod.div);
#pragma unroll
for (int arg = 0; arg < NARGS; arg++)
offsets[arg] += divmod.mod * strides_[1][arg];
}
// [...]
return offsets;
}
#endif

#pragma unroll
for (int arg = 0; arg < NARGS; arg++) {
offsets[arg] = 0;
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