3 // Minio Cloud Storage, (C) 2016 Minio, Inc.
5 // Licensed under the Apache License, Version 2.0 (the "License");
6 // you may not use this file except in compliance with the License.
7 // You may obtain a copy of the License at
9 // http://www.apache.org/licenses/LICENSE-2.0
11 // Unless required by applicable law or agreed to in writing, software
12 // distributed under the License is distributed on an "AS IS" BASIS,
13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 // See the License for the specific language governing permissions and
15 // limitations under the License.
25 func cpuid(op uint32) (eax, ebx, ecx, edx uint32) {
29 func cpuidex(op, op2 uint32) (eax, ebx, ecx, edx uint32) {
33 func xgetbv(index uint32) (eax, edx uint32) {
37 // File to check for cpu capabilities.
38 const procCPUInfo = "/proc/cpuinfo"
40 // Feature to check for.
41 const sha256Feature = "sha2"
43 func haveArmSha() bool {
44 cpuInfo, err := ioutil.ReadFile(procCPUInfo)
48 return bytes.Contains(cpuInfo, []byte(sha256Feature))