1 #ifndef _S390_BYTEORDER_H
2 #define _S390_BYTEORDER_H
3
4 /*
5 * include/asm-s390/byteorder.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 <asm/types.h>
13
14 #ifdef __GNUC__
15
16 static __inline__ __const__ __u32 ___arch__swab32(__u32 x)
17 {
18 __u32 temp;
19
20 __asm__ __volatile__ (
21 " st %0,0(%1)\n"
22 " icm %0,8,3(%1)\n"
23 " icm %0,4,2(%1)\n"
24 " icm %0,2,1(%1)\n"
25 " ic %0,0(%1)"
26 : "+&d" (x) : "a" (&temp) : "memory" );
27 return x;
28 }
29
30 static __inline__ __const__ __u32 ___arch__swab32p(__u32 *x)
31 {
32 __u32 result;
33
34 __asm__ __volatile__ (
35 " icm %0,8,3(%1)\n"
36 " icm %0,4,2(%1)\n"
37 " icm %0,2,1(%1)\n"
38 " ic %0,0(%1)"
39 : "=&d" (result) : "a" (x) );
40 return result;
41 }
42
43 static __inline__ void ___arch__swab32s(__u32 *x)
44 {
45 __asm__ __volatile__ (
46 " icm 0,8,3(%0)\n"
47 " icm 0,4,2(%0)\n"
48 " icm 0,2,1(%0)\n"
49 " ic 0,0(%0)\n"
50 " st 0,0(%0)"
51 : : "a" (x) : "", "memory");
52 }
53
54 static __inline__ __const__ __u16 ___arch__swab16(__u16 x)
55 {
56 __u16 temp;
57
58 __asm__ __volatile__ (
59 " sth %0,0(%1)\n"
60 " icm %0,2,1(%1)\n"
61 " ic %0,0(%1)\n"
62 : "+&d" (x) : "a" (&temp) : "memory");
63 return x;
64 }
65
66 static __inline__ __const__ __u16 ___arch__swab16p(__u16 *x)
67 {
68 __u16 result;
69
70 __asm__ __volatile__ (
71 " sr %0,%0\n"
72 " icm %0,2,1(%1)\n"
73 " ic %0,0(%1)\n"
74 : "=&d" (result) : "a" (x) );
75 return result;
76 }
77
78 static __inline__ void ___arch__swab16s(__u16 *x)
79 {
80 __asm__ __volatile__(
81 " icm 0,2,1(%0)\n"
82 " ic 0,0(%0)\n"
83 " sth 0,0(%0)"
84 : : "a" (x) : "", "memory");
85 }
86
87 #define __arch__swab32(x) ___arch__swab32(x)
88 #define __arch__swab16(x) ___arch__swab16(x)
89 #define __arch__swab32p(x) ___arch__swab32p(x)
90 #define __arch__swab16p(x) ___arch__swab16p(x)
91 #define __arch__swab32s(x) ___arch__swab32s(x)
92 #define __arch__swab16s(x) ___arch__swab16s(x)
93
94 #if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
95 # define __BYTEORDER_HAS_U64__
96 # define __SWAB_64_THRU_32__
97 #endif
98
99 #endif /* __GNUC__ */
100
101 #include <linux/byteorder/big_endian.h>
102
103 #endif /* _S390_BYTEORDER_H */
104
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