initial addition of essential crypto, encoders, workflows and LLM instructions

pkg/crypto/sha256/cpuid_other.go

@@ -0,0 +1,55 @@
+// Minio Cloud Storage, (C) 2021 Minio, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+package sha256
+
+import (
+	"bytes"
+	"github.com/klauspost/cpuid/v2"
+	"io/ioutil"
+	"runtime"
+)
+
+var (
+	hasIntelSha = runtime.GOARCH == "amd64" && cpuid.CPU.Supports(
+		cpuid.SHA, cpuid.SSSE3,
+		cpuid.SSE4,
+	)
+	hasAvx512 = cpuid.CPU.Supports(
+		cpuid.AVX512F, cpuid.AVX512DQ, cpuid.AVX512BW,
+		cpuid.AVX512VL,
+	)
+)
+
+func hasArmSha2() bool {
+	if cpuid.CPU.Has(cpuid.SHA2) {
+		return true
+	}
+	if runtime.GOARCH != "arm64" || runtime.GOOS != "linux" {
+		return false
+	}
+
+	// Fall back to hacky cpuinfo parsing...
+	const procCPUInfo = "/proc/cpuinfo"
+
+	// Feature to check for.
+	const sha256Feature = "sha2"
+
+	cpuInfo, err := ioutil.ReadFile(procCPUInfo)
+	if err != nil {
+		return false
+	}
+	return bytes.Contains(cpuInfo, []byte(sha256Feature))
+}