Ginkgo Generated from branch based on master. Ginkgo version 1.7.0
A numerical linear algebra library targeting many-core architectures
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intrinsics.hpp
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32
33#ifndef GKO_PUBLIC_CORE_BASE_INTRINSICS_HPP_
34#define GKO_PUBLIC_CORE_BASE_INTRINSICS_HPP_
35
36
37#include <bitset>
38
39
40#include <ginkgo/core/base/types.hpp>
41
42
43namespace gko {
44namespace detail {
45
46
50GKO_ATTRIBUTES GKO_INLINE int popcount(uint32 bitmask)
51{
52#if defined(__CUDA_ARCH__) || defined(__HIP_DEVICE_COMPILE__)
53 return __popc(bitmask);
54#else
55 std::bitset<32> bits{bitmask};
56 return bits.count();
57#endif
58}
59
60
64GKO_ATTRIBUTES GKO_INLINE int popcount(uint64 bitmask)
65{
66#if defined(__CUDA_ARCH__) || defined(__HIP_DEVICE_COMPILE__)
67 return __popcll(bitmask);
68#else
69 std::bitset<64> bits{bitmask};
70 return bits.count();
71#endif
72}
73
74
75} // namespace detail
76} // namespace gko
77
78#endif // GKO_PUBLIC_CORE_BASE_INTRINSICS_HPP_
The Ginkgo namespace.
Definition abstract_factory.hpp:48
constexpr T one()
Returns the multiplicative identity for T.
Definition math.hpp:803
std::uint64_t uint64
64-bit unsigned integral type.
Definition types.hpp:166
std::uint32_t uint32
32-bit unsigned integral type.
Definition types.hpp:160