51 lines
1.3 KiB
Go
51 lines
1.3 KiB
Go
// Minio Cloud Storage, (C) 2021 Minio, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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package sha256
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import (
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"bytes"
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"io/ioutil"
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"runtime"
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"github.com/klauspost/cpuid/v2"
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)
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var (
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hasIntelSha = runtime.GOARCH == "amd64" && cpuid.CPU.Supports(cpuid.SHA, cpuid.SSSE3, cpuid.SSE4)
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hasAvx512 = cpuid.CPU.Supports(cpuid.AVX512F, cpuid.AVX512DQ, cpuid.AVX512BW, cpuid.AVX512VL)
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)
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func hasArmSha2() bool {
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if cpuid.CPU.Has(cpuid.SHA2) {
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return true
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}
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if runtime.GOARCH != "arm64" || runtime.GOOS != "linux" {
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return false
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}
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// Fall back to hacky cpuinfo parsing...
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const procCPUInfo = "/proc/cpuinfo"
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// Feature to check for.
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const sha256Feature = "sha2"
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cpuInfo, err := ioutil.ReadFile(procCPUInfo)
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if err != nil {
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return false
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}
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return bytes.Contains(cpuInfo, []byte(sha256Feature))
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}
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