Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #ifndef _ASM_GENERIC_BITOPS_FLS64_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #define _ASM_GENERIC_BITOPS_FLS64_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <asm/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * fls64 - find last set bit in a 64-bit word
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * @x: the word to search
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  * This is defined in a similar way as the libc and compiler builtin
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  * ffsll, but returns the position of the most significant set bit.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  * fls64(value) returns 0 if value is 0 or the position of the last
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  * set bit if value is nonzero. The last (most significant) bit is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  * at position 64.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #if BITS_PER_LONG == 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static __always_inline int fls64(__u64 x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	__u32 h = x >> 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	if (h)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 		return fls(h) + 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	return fls(x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #elif BITS_PER_LONG == 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static __always_inline int fls64(__u64 x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	if (x == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	return __fls(x) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #error BITS_PER_LONG not 32 or 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #endif /* _ASM_GENERIC_BITOPS_FLS64_H_ */