LXR linux/arch/sh/include/uapi/asm/swab.h

   1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2#ifndef __ASM_SH_SWAB_H
   3#define __ASM_SH_SWAB_H
   4
   5/*
   6 * Copyright (C) 1999  Niibe Yutaka
   7 * Copyright (C) 2000, 2001  Paolo Alberelli
   8 */
   9#include <linux/compiler.h>
  10#include <linux/types.h>
  11#include <asm-generic/swab.h>
  12
  13static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
  14{
  15        __asm__(
  16#ifdef __SH5__
  17                "byterev        %1, %0\n\t"
  18                "shari          %0, 32, %0"
  19#else
  20                "swap.b         %1, %0\n\t"
  21                "swap.w         %0, %0\n\t"
  22                "swap.b         %0, %0"
  23#endif
  24                : "=r" (x)
  25                : "r" (x));
  26
  27        return x;
  28}
  29#define __arch_swab32 __arch_swab32
  30
  31static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
  32{
  33        __asm__(
  34#ifdef __SH5__
  35                "byterev        %1, %0\n\t"
  36                "shari          %0, 32, %0"
  37#else
  38                "swap.b         %1, %0"
  39#endif
  40                : "=r" (x)
  41                :  "r" (x));
  42
  43        return x;
  44}
  45#define __arch_swab16 __arch_swab16
  46
  47static inline __u64 __arch_swab64(__u64 val)
  48{
  49        union {
  50                struct { __u32 a,b; } s;
  51                __u64 u;
  52        } v, w;
  53        v.u = val;
  54        w.s.b = __arch_swab32(v.s.a);
  55        w.s.a = __arch_swab32(v.s.b);
  56        return w.u;
  57}
  58#define __arch_swab64 __arch_swab64
  59
  60#endif /* __ASM_SH_SWAB_H */
  61