Ginkgo: ginkgo/core/base/intrinsics.hpp Source File

| Ginkgo Generated from branch based on main. Ginkgo version 1.11.0 A numerical linear algebra library targeting many-core architectures

Loading...
Searching...
No Matches
intrinsics.hpp
1// SPDX-FileCopyrightText: 2017 - 2025 The Ginkgo authors
2//
3// SPDX-License-Identifier: BSD-3-Clause
4
5#ifndef GKO_PUBLIC_CORE_BASE_INTRINSICS_HPP_
6#define GKO_PUBLIC_CORE_BASE_INTRINSICS_HPP_
7
8
9#include <bitset>
10
11#include <ginkgo/core/base/types.hpp>
12
13
14namespace gko {
15namespace detail {
16
17
21GKO_ATTRIBUTES GKO_INLINE int popcount(uint32 bitmask)
22{
23#if defined(__CUDA_ARCH__) || defined(__HIP_DEVICE_COMPILE__)
24 return __popc(static_cast<unsigned>(bitmask));
25#else
26 std::bitset<32> bits{bitmask};
27 return bits.count();
28#endif
29}
30
31
33GKO_ATTRIBUTES GKO_INLINE int popcount(uint64 bitmask)
34{
35#if defined(__CUDA_ARCH__) || defined(__HIP_DEVICE_COMPILE__)
36 return __popcll(static_cast<unsigned long long>(bitmask));
37#else
38 std::bitset<64> bits{bitmask};
39 return bits.count();
40#endif
41}
42
43
44} // namespace detail
45} // namespace gko
46
47#endif // GKO_PUBLIC_CORE_BASE_INTRINSICS_HPP_
gko
The Ginkgo namespace.
Definition abstract_factory.hpp:20
gko::uint64
std::uint64_t uint64
64-bit unsigned integral type.
Definition types.hpp:136
gko::uint32
std::uint32_t uint32
32-bit unsigned integral type.
Definition types.hpp:130