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/*
* Linux-specific AArch64 CRC32 instruction probing implementation
*
* ICRAR - International Centre for Radio Astronomy Research
* (c) UWA - The University of Western Australia, 2020
* Copyright by UWA (in the framework of the ICRAR)
* All rights reserved
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*/
#include "common.h"
#if defined(IS_ARM) && (defined(__linux__) || defined(linux))
#include <sys/auxv.h>
#ifndef HWCAP_CRC32
/* see arch/arm64/include/uapi/asm/hwcap.h */
#define HWCAP_CRC32 (1 << 7)
#endif
int _crc32c_arm64_probe(void)
{
unsigned long auxval;
auxval = getauxval(AT_HWCAP);
return (auxval & HWCAP_CRC32) != 0;
}
#endif