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Use atomic load in SYCL version of the single-pass scan #3419

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merged 1 commit into from
Jul 12, 2023
Merged

Use atomic load in SYCL version of the single-pass scan #3419

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15 changes: 15 additions & 0 deletions Src/Base/AMReX_Scan.H
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Original file line number Diff line number Diff line change
Expand Up @@ -139,12 +139,27 @@ struct BlockStatus<T, false>

AMREX_GPU_DEVICE AMREX_FORCE_INLINE
STVA<T> read () volatile {
#if defined(AMREX_USE_SYCL)
constexpr auto mo = sycl::memory_order::relaxed;
constexpr auto ms = sycl::memory_scope::device;
constexpr auto as = sycl::access::address_space::global_space;
#endif
if (status == 'x') {
return {'x', 0};
} else if (status == 'a') {
#if defined(AMREX_USE_SYCL)
sycl::atomic_ref<T,mo,ms,as> ar{const_cast<T&>(aggregate)};
return {'a', ar.load()};
#else
return {'a', aggregate};
#endif
} else {
#if defined(AMREX_USE_SYCL)
sycl::atomic_ref<T,mo,ms,as> ar{const_cast<T&>(inclusive)};
return {'p', ar.load()};
#else
return {'p', inclusive};
#endif
}
}

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3 changes: 3 additions & 0 deletions Tools/GNUMake/comps/dpcpp.mak
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Expand Up @@ -6,6 +6,9 @@ CC = icx
FC = ifx
F90 = ifx

amrex_oneapi_version = $(shell $(CXX) --version | head -1)
$(info oneAPI version: $(amrex_oneapi_version))

CXXFLAGS =
CFLAGS =
FFLAGS =
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