1 #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
12 #include <linux/types.h>
13
14 #ifndef __s390x__
15 # define __SWAB_64_THRU_32__
16 #endif
17
18 #ifdef __s390x__
__arch_swab64p(const __u64 * x)19 static 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
__arch_swab64(__u64 x)28 static 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
__arch_swab64s(__u64 * x)37 static inline void __arch_swab64s(__u64 *x)
38 {
39 *x = __arch_swab64p(x);
40 }
41 #define __arch_swab64s __arch_swab64s
42 #endif /* __s390x__ */
43
__arch_swab32p(const __u32 * x)44 static 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__
__arch_swab32(__u32 x)64 static 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
__arch_swab16p(const __u16 * x)74 static 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 */
92