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60 lines
1.5 KiB
60 lines
1.5 KiB
10 years ago
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/*
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* Mini Object Storage, (C) 2014 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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#include <stdio.h>
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#include <stdlib.h>
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static void cpuid(int cpuinfo[4] ,int infotype) {
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__asm__ __volatile__ (
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"cpuid":
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"=a" (cpuinfo[0]),
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"=b" (cpuinfo[1]),
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"=c" (cpuinfo[2]),
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"=d" (cpuinfo[3]) :
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"a" (infotype), "c" (0)
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);
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}
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/*
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SSE41 : return true
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no SSE41 : return false
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*/
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int has_sse41 (void) {
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int info[4];
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cpuid(info, 0x00000001);
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return ((info[2] & ((int)1 << 19)) != 0);
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}
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/*
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AVX : return true
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no AVX : return false
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*/
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int has_avx (void) {
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int info[4];
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cpuid(info, 0x00000001);
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return ((info[2] & ((int)1 << 28)) != 0);
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}
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/*
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AVX2 : return true
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no AVX2 : return false
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*/
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int has_avx2 (void) {
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int info[4];
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cpuid(info, 0x00000007);
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return ((info[1] & ((int)1 << 5)) != 0);
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}
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