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Remove 64-bits to 128-bits multiplication

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This commit is contained in:
Li-Ta Lo 2020-03-18 16:06:47 -06:00
parent 46813d4e90
commit 32d9d04ae7
1 changed files with 0 additions and 13 deletions
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13
vtkm/random/Philox.h
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@ -26,19 +26,6 @@ VTKM_EXEC_CONT vtkm::Vec<vtkm::UInt32, 2> mulhilo(vtkm::UInt32 a, vtkm::UInt32 b
return { lo, hi };
}
VTKM_EXEC_CONT vtkm::Vec<vtkm::UInt64, 2> mulhilo(vtkm::UInt64 a, vtkm::UInt64 b)
{
#ifdef VTKM_CUDA
vtkm::UInt64 lo = a * b;
vtkm::UInt64 hi = __umul64hi(a, b);
#else
__uint128_t r = static_cast<__uint128_t>(a) * static_cast<__uint128_t>(b);
vtkm::UInt64 lo = static_cast<vtkm::UInt64>(r);
vtkm::UInt64 hi = r >> 64;
#endif
return { lo, hi };
}
template <typename UIntType, std::size_t N, UIntType... consts>
struct philox_parameters;