| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| 2 | #ifndef _ASM_X86_SWAB_H |
| 3 | #define _ASM_X86_SWAB_H |
| 4 | |
| 5 | #include <linux/types.h> |
| 6 | #include <linux/compiler.h> |
| 7 | |
| 8 | static inline __attribute_const__ __u32 __arch_swab32(__u32 val) |
| 9 | { |
| 10 | asm("bswapl %0" : "=r" (val) : "0" (val)); |
| 11 | return val; |
| 12 | } |
| 13 | #define __arch_swab32 __arch_swab32 |
| 14 | |
| 15 | static inline __attribute_const__ __u64 __arch_swab64(__u64 val) |
| 16 | { |
| 17 | #ifdef __i386__ |
| 18 | union { |
| 19 | struct { |
| 20 | __u32 a; |
| 21 | __u32 b; |
| 22 | } s; |
| 23 | __u64 u; |
| 24 | } v; |
| 25 | v.u = val; |
| 26 | asm("bswapl %0 ; bswapl %1 ; xchgl %0,%1" |
| 27 | : "=r" (v.s.a), "=r" (v.s.b) |
| 28 | : "0" (v.s.a), "1" (v.s.b)); |
| 29 | return v.u; |
| 30 | #else /* __i386__ */ |
| 31 | asm("bswapq %0" : "=r" (val) : "0" (val)); |
| 32 | return val; |
| 33 | #endif |
| 34 | } |
| 35 | #define __arch_swab64 __arch_swab64 |
| 36 | |
| 37 | #endif /* _ASM_X86_SWAB_H */ |