arch/s390/include/asm/byteorder.h

   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 #define __BIG_ENDIAN
  15
  16 #ifndef __s390x__
  17 # define __SWAB_64_THRU_32__
  18 #endif
  19
  20 #ifdef __s390x__
  21 static inline __u64 __arch_swab64p(const __u64 *x)
  22 {
  23         __u64 result;
  24
  25         asm volatile("lrvg %0,%1" : "=d" (result) : "m" (*x));
  26         return result;
  27 }
  28 #define __arch_swab64p __arch_swab64p
  29
  30 static inline __u64 __arch_swab64(__u64 x)
  31 {
  32         __u64 result;
  33
  34         asm volatile("lrvgr %0,%1" : "=d" (result) : "d" (x));
  35         return result;
  36 }
  37 #define __arch_swab64 __arch_swab64
  38
  39 static inline void __arch_swab64s(__u64 *x)
  40 {
  41         *x = __arch_swab64p(x);
  42 }
  43 #define __arch_swab64s __arch_swab64s
  44 #endif /* __s390x__ */
  45
  46 static inline __u32 __arch_swab32p(const __u32 *x)
  47 {
  48         __u32 result;
  49
  50         asm volatile(
  51 #ifndef __s390x__
  52                 "       icm     %0,8,3(%1)\n"
  53                 "       icm     %0,4,2(%1)\n"
  54                 "       icm     %0,2,1(%1)\n"
  55                 "       ic      %0,0(%1)"
  56                 : "=&d" (result) : "a" (x), "m" (*x) : "cc");
  57 #else /* __s390x__ */
  58                 "       lrv     %0,%1"
  59                 : "=d" (result) : "m" (*x));
  60 #endif /* __s390x__ */
  61         return result;
  62 }
  63 #define __arch_swab32p __arch_swab32p
  64
  65 #ifdef __s390x__
  66 static inline __u32 __arch_swab32(__u32 x)
  67 {
  68         __u32 result;
  69
  70         asm volatile("lrvr  %0,%1" : "=d" (result) : "d" (x));
  71         return result;
  72 }
  73 #define __arch_swab32 __arch_swab32
  74 #endif /* __s390x__ */
  75
  76 static inline __u16 __arch_swab16p(const __u16 *x)
  77 {
  78         __u16 result;
  79
  80         asm volatile(
  81 #ifndef __s390x__
  82                 "       icm     %0,2,1(%1)\n"
  83                 "       ic      %0,0(%1)\n"
  84                 : "=&d" (result) : "a" (x), "m" (*x) : "cc");
  85 #else /* __s390x__ */
  86                 "       lrvh    %0,%1"
  87                 : "=d" (result) : "m" (*x));
  88 #endif /* __s390x__ */
  89         return result;
  90 }
  91 #define __arch_swab16p __arch_swab16p
  92
  93 #include <linux/byteorder.h>
  94
  95 #endif /* _S390_BYTEORDER_H */