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minio/pkg/cpu/cpu.go

39 lines
1.2 KiB

/*
* Minimalist Object Storage, (C) 2015 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 cpu
// cpuid, cpuidex
func cpuid(op uint32) (eax, ebx, ecx, edx uint32)
func cpuidex(op, op2 uint32) (eax, ebx, ecx, edx uint32)
// HasSSE41 - CPUID instruction verification wrapper for SSE41 extensions
func HasSSE41() bool {
_, _, c, _ := cpuid(1)
return ((c & (1 << 19)) != 0)
}
// HasAVX - CPUID instruction verification wrapper for AVX extensions
func HasAVX() bool {
_, _, c, _ := cpuid(1)
return ((c & (1 << 28)) != 0)
}
// HasAVX2 - CPUID instruction verification wrapper for AVX2 extensions
func HasAVX2() bool {
_, b, _, _ := cpuidex(7, 0)
return ((b & (1 << 5)) != 0)
}