Contributors: 3
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Eric Biggers |
92 |
50.83% |
5 |
71.43% |
| Xiao Wang |
71 |
39.23% |
1 |
14.29% |
| Linus Torvalds |
18 |
9.94% |
1 |
14.29% |
| Total |
181 |
|
7 |
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* RISC-V optimized CRC32 functions
*
* Copyright 2025 Google LLC
*/
#include <asm/hwcap.h>
#include <asm/alternative-macros.h>
#include "crc-clmul.h"
static inline u32 crc32_le_arch(u32 crc, const u8 *p, size_t len)
{
if (riscv_has_extension_likely(RISCV_ISA_EXT_ZBC))
return crc32_lsb_clmul(crc, p, len,
&crc32_lsb_0xedb88320_consts);
return crc32_le_base(crc, p, len);
}
static inline u32 crc32_be_arch(u32 crc, const u8 *p, size_t len)
{
if (riscv_has_extension_likely(RISCV_ISA_EXT_ZBC))
return crc32_msb_clmul(crc, p, len,
&crc32_msb_0x04c11db7_consts);
return crc32_be_base(crc, p, len);
}
static inline u32 crc32c_arch(u32 crc, const u8 *p, size_t len)
{
if (riscv_has_extension_likely(RISCV_ISA_EXT_ZBC))
return crc32_lsb_clmul(crc, p, len,
&crc32_lsb_0x82f63b78_consts);
return crc32c_base(crc, p, len);
}
static inline u32 crc32_optimizations_arch(void)
{
if (riscv_has_extension_likely(RISCV_ISA_EXT_ZBC))
return CRC32_LE_OPTIMIZATION |
CRC32_BE_OPTIMIZATION |
CRC32C_OPTIMIZATION;
return 0;
}