arch/s390/include/asm/swab.h

   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__
  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 */