| Guo Ren | 735ee00 | 2018-09-05 14:25:22 +0800 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| Guo Ren | 735ee00 | 2018-09-05 14:25:22 +0800 | [diff] [blame] | 2 | |
| 3 | #ifndef __ASM_CSKY_BITOPS_H |
| 4 | #define __ASM_CSKY_BITOPS_H |
| 5 | |
| 6 | #include <linux/compiler.h> |
| 7 | #include <asm/barrier.h> |
| 8 | |
| 9 | /* |
| 10 | * asm-generic/bitops/ffs.h |
| 11 | */ |
| 12 | static inline int ffs(int x) |
| 13 | { |
| 14 | if (!x) |
| 15 | return 0; |
| 16 | |
| 17 | asm volatile ( |
| 18 | "brev %0\n" |
| 19 | "ff1 %0\n" |
| 20 | "addi %0, 1\n" |
| 21 | : "=&r"(x) |
| 22 | : "0"(x)); |
| 23 | return x; |
| 24 | } |
| 25 | |
| 26 | /* |
| 27 | * asm-generic/bitops/__ffs.h |
| 28 | */ |
| 29 | static __always_inline unsigned long __ffs(unsigned long x) |
| 30 | { |
| 31 | asm volatile ( |
| 32 | "brev %0\n" |
| 33 | "ff1 %0\n" |
| 34 | : "=&r"(x) |
| 35 | : "0"(x)); |
| 36 | return x; |
| 37 | } |
| 38 | |
| 39 | /* |
| 40 | * asm-generic/bitops/fls.h |
| 41 | */ |
| Matthew Wilcox | 3fc2579 | 2019-01-03 15:26:41 -0800 | [diff] [blame] | 42 | static __always_inline int fls(unsigned int x) |
| Guo Ren | 735ee00 | 2018-09-05 14:25:22 +0800 | [diff] [blame] | 43 | { |
| 44 | asm volatile( |
| 45 | "ff1 %0\n" |
| 46 | : "=&r"(x) |
| 47 | : "0"(x)); |
| 48 | |
| 49 | return (32 - x); |
| 50 | } |
| 51 | |
| 52 | /* |
| 53 | * asm-generic/bitops/__fls.h |
| 54 | */ |
| 55 | static __always_inline unsigned long __fls(unsigned long x) |
| 56 | { |
| 57 | return fls(x) - 1; |
| 58 | } |
| 59 | |
| 60 | #include <asm-generic/bitops/ffz.h> |
| 61 | #include <asm-generic/bitops/fls64.h> |
| 62 | #include <asm-generic/bitops/find.h> |
| 63 | |
| 64 | #ifndef _LINUX_BITOPS_H |
| 65 | #error only <linux/bitops.h> can be included directly |
| 66 | #endif |
| 67 | |
| 68 | #include <asm-generic/bitops/sched.h> |
| 69 | #include <asm-generic/bitops/hweight.h> |
| 70 | #include <asm-generic/bitops/lock.h> |
| 71 | #include <asm-generic/bitops/atomic.h> |
| 72 | |
| 73 | /* |
| 74 | * bug fix, why only could use atomic!!!! |
| 75 | */ |
| 76 | #include <asm-generic/bitops/non-atomic.h> |
| Guo Ren | 735ee00 | 2018-09-05 14:25:22 +0800 | [diff] [blame] | 77 | |
| 78 | #include <asm-generic/bitops/le.h> |
| 79 | #include <asm-generic/bitops/ext2-atomic.h> |
| 80 | #endif /* __ASM_CSKY_BITOPS_H */ |