1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * RISC-V optimized CRC64 functions
4 *
5 * Copyright 2025 Google LLC
6 */
7
8 #include <asm/hwcap.h>
9 #include <asm/alternative-macros.h>
10
11 #include "crc-clmul.h"
12
crc64_be_arch(u64 crc,const u8 * p,size_t len)13 static inline u64 crc64_be_arch(u64 crc, const u8 *p, size_t len)
14 {
15 if (riscv_has_extension_likely(RISCV_ISA_EXT_ZBC))
16 return crc64_msb_clmul(crc, p, len,
17 &crc64_msb_0x42f0e1eba9ea3693_consts);
18 return crc64_be_generic(crc, p, len);
19 }
20
crc64_nvme_arch(u64 crc,const u8 * p,size_t len)21 static inline u64 crc64_nvme_arch(u64 crc, const u8 *p, size_t len)
22 {
23 if (riscv_has_extension_likely(RISCV_ISA_EXT_ZBC))
24 return crc64_lsb_clmul(crc, p, len,
25 &crc64_lsb_0x9a6c9329ac4bc9b5_consts);
26 return crc64_nvme_generic(crc, p, len);
27 }
28