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/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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.
*/
#include <aws/common/cpuid.h>
#include <sys/sysctl.h>
bool aws_cpu_has_feature(enum aws_cpu_feature_name feature_name) {
int64_t ret = 0;
size_t size = sizeof(ret);
switch (feature_name) {
case AWS_CPU_FEATURE_ARM_PMULL:
if (sysctlbyname("hw.optional.arm.FEAT_PMULL", &ret, &size, NULL, 0) != -1) {
return ret == 1;
}
case AWS_CPU_FEATURE_ARM_CRC:
if (sysctlbyname("hw.optional.armv8_crc32", &ret, &size, NULL, 0) != -1) {
return ret == 1;
}
case AWS_CPU_FEATURE_ARM_CRYPTO:
if (sysctlbyname("hw.optional.arm.FEAT_AES", &ret, &size, NULL, 0) != -1) {
return ret == 1;
}
default:
return false;
}
}
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