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
  16 static __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
  27 static __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
  35 static __inline__ __attribute_const__ __u32 __arch_swab32(__u32 xx)
  36 {
  37         return __arch_swahb32(__arch_swahw32(xx));
  38 }
  39 #define __arch_swab32 __arch_swab32
  40
  41 static __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 */