1 // Copyright 2017 Google Inc.
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
7 // http://www.apache.org/licenses/LICENSE-2.0
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
15 #ifndef CPU_FEATURES_INCLUDE_INTERNAL_CPUID_X86_H_
16 #define CPU_FEATURES_INCLUDE_INTERNAL_CPUID_X86_H_
20 #include "cpu_features_macros.h"
22 CPU_FEATURES_START_CPP_NAMESPACE
24 // A struct to hold the result of a call to cpuid.
26 uint32_t eax, ebx, ecx, edx;
29 // Retrieves the leaf for a particular cpuid.
30 Leaf CpuId(uint32_t leaf_id);
32 // Returns the eax value of the XCR0 register.
33 uint32_t GetXCR0Eax(void);
35 CPU_FEATURES_END_CPP_NAMESPACE
37 #endif // CPU_FEATURES_INCLUDE_INTERNAL_CPUID_X86_H_