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Harvey Harrison13f78772009-01-06 14:56:24 -08001#ifndef _S390_SWAB_H
2#define _S390_SWAB_H
3
4/*
5 * include/asm-s390/swab.h
6 *
7 * S390 version
8 * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
9 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
10 */
11
Heiko Carstens0680ba02009-01-09 12:14:52 +010012#include <linux/types.h>
Harvey Harrison13f78772009-01-06 14:56:24 -080013
14#ifndef __s390x__
15# define __SWAB_64_THRU_32__
16#endif
17
18#ifdef __s390x__
19static inline __u64 __arch_swab64p(const __u64 *x)
20{
21 __u64 result;
22
23 asm volatile("lrvg %0,%1" : "=d" (result) : "m" (*x));
24 return result;
25}
26#define __arch_swab64p __arch_swab64p
27
28static inline __u64 __arch_swab64(__u64 x)
29{
30 __u64 result;
31
32 asm volatile("lrvgr %0,%1" : "=d" (result) : "d" (x));
33 return result;
34}
35#define __arch_swab64 __arch_swab64
36
37static inline void __arch_swab64s(__u64 *x)
38{
39 *x = __arch_swab64p(x);
40}
41#define __arch_swab64s __arch_swab64s
42#endif /* __s390x__ */
43
44static inline __u32 __arch_swab32p(const __u32 *x)
45{
46 __u32 result;
47
48 asm volatile(
49#ifndef __s390x__
50 " icm %0,8,3(%1)\n"
51 " icm %0,4,2(%1)\n"
52 " icm %0,2,1(%1)\n"
53 " ic %0,0(%1)"
54 : "=&d" (result) : "a" (x), "m" (*x) : "cc");
55#else /* __s390x__ */
56 " lrv %0,%1"
57 : "=d" (result) : "m" (*x));
58#endif /* __s390x__ */
59 return result;
60}
61#define __arch_swab32p __arch_swab32p
62
63#ifdef __s390x__
64static inline __u32 __arch_swab32(__u32 x)
65{
66 __u32 result;
67
68 asm volatile("lrvr %0,%1" : "=d" (result) : "d" (x));
69 return result;
70}
71#define __arch_swab32 __arch_swab32
72#endif /* __s390x__ */
73
74static inline __u16 __arch_swab16p(const __u16 *x)
75{
76 __u16 result;
77
78 asm volatile(
79#ifndef __s390x__
80 " icm %0,2,1(%1)\n"
81 " ic %0,0(%1)\n"
82 : "=&d" (result) : "a" (x), "m" (*x) : "cc");
83#else /* __s390x__ */
84 " lrvh %0,%1"
85 : "=d" (result) : "m" (*x));
86#endif /* __s390x__ */
87 return result;
88}
89#define __arch_swab16p __arch_swab16p
90
91#endif /* _S390_SWAB_H */