| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _TOOLS_LINUX_BITOPS_H_ |
| #define _TOOLS_LINUX_BITOPS_H_ |
| |
| #include <asm/types.h> |
| #include <limits.h> |
| #ifndef __WORDSIZE |
| #define __WORDSIZE (__SIZEOF_LONG__ * 8) |
| #endif |
| |
| #ifndef BITS_PER_LONG |
| # define BITS_PER_LONG __WORDSIZE |
| #endif |
| #include <linux/bits.h> |
| #include <linux/compiler.h> |
| |
| #define BITS_PER_TYPE(type) (sizeof(type) * BITS_PER_BYTE) |
| #define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(long)) |
| #define BITS_TO_U64(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(u64)) |
| #define BITS_TO_U32(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(u32)) |
| #define BITS_TO_BYTES(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(char)) |
| |
| extern unsigned int __sw_hweight8(unsigned int w); |
| extern unsigned int __sw_hweight16(unsigned int w); |
| extern unsigned int __sw_hweight32(unsigned int w); |
| extern unsigned long __sw_hweight64(__u64 w); |
| |
| /* |
| * Defined here because those may be needed by architecture-specific static |
| * inlines. |
| */ |
| |
| #define bitop(op, nr, addr) \ |
| op(nr, addr) |
| |
| #define __set_bit(nr, addr) bitop(___set_bit, nr, addr) |
| #define __clear_bit(nr, addr) bitop(___clear_bit, nr, addr) |
| #define __change_bit(nr, addr) bitop(___change_bit, nr, addr) |
| #define __test_and_set_bit(nr, addr) bitop(___test_and_set_bit, nr, addr) |
| #define __test_and_clear_bit(nr, addr) bitop(___test_and_clear_bit, nr, addr) |
| #define __test_and_change_bit(nr, addr) bitop(___test_and_change_bit, nr, addr) |
| #define test_bit(nr, addr) bitop(_test_bit, nr, addr) |
| |
| /* |
| * Include this here because some architectures need generic_ffs/fls in |
| * scope |
| * |
| * XXX: this needs to be asm/bitops.h, when we get to per arch optimizations |
| */ |
| #include <asm-generic/bitops.h> |
| |
| #define for_each_set_bit(bit, addr, size) \ |
| for ((bit) = find_first_bit((addr), (size)); \ |
| (bit) < (size); \ |
| (bit) = find_next_bit((addr), (size), (bit) + 1)) |
| |
| #define for_each_clear_bit(bit, addr, size) \ |
| for ((bit) = find_first_zero_bit((addr), (size)); \ |
| (bit) < (size); \ |
| (bit) = find_next_zero_bit((addr), (size), (bit) + 1)) |
| |
| /* same as for_each_set_bit() but use bit as value to start with */ |
| #define for_each_set_bit_from(bit, addr, size) \ |
| for ((bit) = find_next_bit((addr), (size), (bit)); \ |
| (bit) < (size); \ |
| (bit) = find_next_bit((addr), (size), (bit) + 1)) |
| |
| static inline unsigned long hweight_long(unsigned long w) |
| { |
| return sizeof(w) == 4 ? hweight32(w) : hweight64(w); |
| } |
| |
| static inline unsigned fls_long(unsigned long l) |
| { |
| if (sizeof(l) == 4) |
| return fls(l); |
| return fls64(l); |
| } |
| |
| /** |
| * rol32 - rotate a 32-bit value left |
| * @word: value to rotate |
| * @shift: bits to roll |
| */ |
| static inline __u32 rol32(__u32 word, unsigned int shift) |
| { |
| return (word << shift) | (word >> ((-shift) & 31)); |
| } |
| |
| #endif |