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

   1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
   2/*
   3 * Copyright 2009 Analog Devices Inc.
   4 *
   5 * Licensed under the GPL-2 or later.
   6 */
   7
   8#ifndef _UAPI_BLACKFIN_SWAB_H
   9#define _UAPI_BLACKFIN_SWAB_H
  10
  11#include <linux/types.h>
  12#include <asm-generic/swab.h>
  13
  14#ifdef __GNUC__
  15
  16static __inline__ __attribute_const__ __u32 __arch_swahb32(__u32 xx)
  17{
  18        __u32 tmp;
  19        __asm__("%1 = %0 >> 8 (V);\n\t"
  20                "%0 = %0 << 8 (V);\n\t"
  21                "%0 = %0 | %1;\n\t"
  22                : "+d"(xx), "=&d"(tmp));
  23        return xx;
  24}
  25#define __arch_swahb32 __arch_swahb32
  26
  27static __inline__ __attribute_const__ __u32 __arch_swahw32(__u32 xx)
  28{
  29        __u32 rv;
  30        __asm__("%0 = PACK(%1.L, %1.H);\n\t": "=d"(rv): "d"(xx));
  31        return rv;
  32}
  33#define __arch_swahw32 __arch_swahw32
  34
  35static __inline__ __attribute_const__ __u32 __arch_swab32(__u32 xx)
  36{
  37        return __arch_swahb32(__arch_swahw32(xx));
  38}
  39#define __arch_swab32 __arch_swab32
  40
  41static __inline__ __attribute_const__ __u16 __arch_swab16(__u16 xx)
  42{
  43        __u32 xw = xx;
  44        __asm__("%0 <<= 8;\n    %0.L = %0.L + %0.H (NS);\n": "+d"(xw));
  45        return (__u16)xw;
  46}
  47#define __arch_swab16 __arch_swab16
  48
  49#endif /* __GNUC__ */
  50
  51#endif /* _UAPI_BLACKFIN_SWAB_H */
  52