Harvey Harrison | 13f7877 | 2009-01-06 14:56:24 -0800 | [diff] [blame] | 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 | |
Heiko Carstens | 0680ba0 | 2009-01-09 12:14:52 +0100 | [diff] [blame^] | 12 | #include <linux/types.h> |
Harvey Harrison | 13f7877 | 2009-01-06 14:56:24 -0800 | [diff] [blame] | 13 | |
| 14 | #ifndef __s390x__ |
| 15 | # define __SWAB_64_THRU_32__ |
| 16 | #endif |
| 17 | |
| 18 | #ifdef __s390x__ |
| 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 | |
| 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 | |
| 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 | |
| 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__ |
| 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 | |
| 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 */ |