1/* Copyright 2020 Google LLC. All Rights Reserved.
2
3Licensed under the Apache License, Version 2.0 (the "License");
4you may not use this file except in compliance with the License.
5You may obtain a copy of the License at
6
7 http://www.apache.org/licenses/LICENSE-2.0
8
9Unless required by applicable law or agreed to in writing, software
10distributed under the License is distributed on an "AS IS" BASIS,
11WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12See the License for the specific language governing permissions and
13limitations under the License.
14==============================================================================*/
15
16#ifndef RUY_RUY_CPUINFO_H_
17#define RUY_RUY_CPUINFO_H_
18
19#include "ruy/cpu_cache_params.h"
20
21namespace ruy {
22
23// Wraps the functionality that ruy needs from the cpuinfo library.
24class CpuInfo final {
25 public:
26 CpuInfo() {}
27 ~CpuInfo();
28
29 // ARM features
30 bool NeonDotprod();
31
32 // X86 features
33 bool Sse42();
34 bool Avx();
35 bool Avx2Fma();
36 bool Avx512();
37 bool AvxVnni();
38
39 // Common features
40 const CpuCacheParams& CacheParams();
41 bool CurrentCpuIsA55ish();
42 bool CurrentCpuIsX1();
43
44 private:
45 enum class InitStatus {
46 kNotYetAttempted,
47 kInitialized,
48 kFailed,
49 };
50
51 InitStatus init_status_ = InitStatus::kNotYetAttempted;
52 CpuCacheParams cache_params_;
53
54 bool EnsureInitialized();
55 InitStatus Initialize();
56
57 CpuInfo(const CpuInfo&) = delete;
58};
59
60} // namespace ruy
61
62#endif // RUY_RUY_CPUINFO_H_
63