mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
44 lines
1.7 KiB
44 lines
1.7 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
#ifndef _ASM_GENERIC_BITOPS_CONST_HWEIGHT_H_ |
|
#define _ASM_GENERIC_BITOPS_CONST_HWEIGHT_H_ |
|
|
|
/* |
|
* Compile time versions of __arch_hweightN() |
|
*/ |
|
#define __const_hweight8(w) \ |
|
((unsigned int) \ |
|
((!!((w) & (1ULL << 0))) + \ |
|
(!!((w) & (1ULL << 1))) + \ |
|
(!!((w) & (1ULL << 2))) + \ |
|
(!!((w) & (1ULL << 3))) + \ |
|
(!!((w) & (1ULL << 4))) + \ |
|
(!!((w) & (1ULL << 5))) + \ |
|
(!!((w) & (1ULL << 6))) + \ |
|
(!!((w) & (1ULL << 7))))) |
|
|
|
#define __const_hweight16(w) (__const_hweight8(w) + __const_hweight8((w) >> 8 )) |
|
#define __const_hweight32(w) (__const_hweight16(w) + __const_hweight16((w) >> 16)) |
|
#define __const_hweight64(w) (__const_hweight32(w) + __const_hweight32((w) >> 32)) |
|
|
|
/* |
|
* Generic interface. |
|
*/ |
|
#define hweight8(w) (__builtin_constant_p(w) ? __const_hweight8(w) : __arch_hweight8(w)) |
|
#define hweight16(w) (__builtin_constant_p(w) ? __const_hweight16(w) : __arch_hweight16(w)) |
|
#define hweight32(w) (__builtin_constant_p(w) ? __const_hweight32(w) : __arch_hweight32(w)) |
|
#define hweight64(w) (__builtin_constant_p(w) ? __const_hweight64(w) : __arch_hweight64(w)) |
|
|
|
/* |
|
* Interface for known constant arguments |
|
*/ |
|
#define HWEIGHT8(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight8(w)) |
|
#define HWEIGHT16(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight16(w)) |
|
#define HWEIGHT32(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight32(w)) |
|
#define HWEIGHT64(w) (BUILD_BUG_ON_ZERO(!__builtin_constant_p(w)) + __const_hweight64(w)) |
|
|
|
/* |
|
* Type invariant interface to the compile time constant hweight functions. |
|
*/ |
|
#define HWEIGHT(w) HWEIGHT64((u64)w) |
|
|
|
#endif /* _ASM_GENERIC_BITOPS_CONST_HWEIGHT_H_ */
|
|
|