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 | |
7 | |
8 | static __inline__ __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__ __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 */ |
38 | |