/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * CRC64 using ARM64 PMULL instructions
 */

#include <linux/cpufeature.h>
#include <asm/simd.h>
#include <linux/minmax.h>
#include <linux/sizes.h>

u64 crc64_nvme_neon(u64 crc, const u8 *p, size_t len);

#define crc64_be_arch crc64_be_generic

static inline u64 crc64_nvme_arch(u64 crc, const u8 *p, size_t len)
{
        if (len >= 128 && cpu_have_named_feature(PMULL) &&
            likely(may_use_simd())) {
                size_t chunk = len & ~15;

                scoped_ksimd()
                        crc = crc64_nvme_neon(crc, p, chunk);

                p += chunk;
                len &= 15;
        }
        return crc64_nvme_generic(crc, p, len);
}