1 #ifndef _S390_SWAB_H
2 #define _S390_SWAB_H
3
4 /*
5 * S390 version
6 * Copyright IBM Corp. 1999
7 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
8 */
9
10 #include <linux/types.h>
11
12 #ifndef __s390x__
13 # define __SWAB_64_THRU_32__
14 #endif
15
16 #ifdef __s390x__
__arch_swab64p(const __u64 * x)17 static inline __u64 __arch_swab64p(const __u64 *x)
18 {
19 __u64 result;
20
21 asm volatile("lrvg %0,%1" : "=d" (result) : "m" (*x));
22 return result;
23 }
24 #define __arch_swab64p __arch_swab64p
25
__arch_swab64(__u64 x)26 static inline __u64 __arch_swab64(__u64 x)
27 {
28 __u64 result;
29
30 asm volatile("lrvgr %0,%1" : "=d" (result) : "d" (x));
31 return result;
32 }
33 #define __arch_swab64 __arch_swab64
34
__arch_swab64s(__u64 * x)35 static inline void __arch_swab64s(__u64 *x)
36 {
37 *x = __arch_swab64p(x);
38 }
39 #define __arch_swab64s __arch_swab64s
40 #endif /* __s390x__ */
41
__arch_swab32p(const __u32 * x)42 static inline __u32 __arch_swab32p(const __u32 *x)
43 {
44 __u32 result;
45
46 asm volatile(
47 #ifndef __s390x__
48 " icm %0,8,%O1+3(%R1)\n"
49 " icm %0,4,%O1+2(%R1)\n"
50 " icm %0,2,%O1+1(%R1)\n"
51 " ic %0,%1"
52 : "=&d" (result) : "Q" (*x) : "cc");
53 #else /* __s390x__ */
54 " lrv %0,%1"
55 : "=d" (result) : "m" (*x));
56 #endif /* __s390x__ */
57 return result;
58 }
59 #define __arch_swab32p __arch_swab32p
60
61 #ifdef __s390x__
__arch_swab32(__u32 x)62 static inline __u32 __arch_swab32(__u32 x)
63 {
64 __u32 result;
65
66 asm volatile("lrvr %0,%1" : "=d" (result) : "d" (x));
67 return result;
68 }
69 #define __arch_swab32 __arch_swab32
70 #endif /* __s390x__ */
71
__arch_swab16p(const __u16 * x)72 static inline __u16 __arch_swab16p(const __u16 *x)
73 {
74 __u16 result;
75
76 asm volatile(
77 #ifndef __s390x__
78 " icm %0,2,%O1+1(%R1)\n"
79 " ic %0,%1\n"
80 : "=&d" (result) : "Q" (*x) : "cc");
81 #else /* __s390x__ */
82 " lrvh %0,%1"
83 : "=d" (result) : "m" (*x));
84 #endif /* __s390x__ */
85 return result;
86 }
87 #define __arch_swab16p __arch_swab16p
88
89 #endif /* _S390_SWAB_H */
90