arch/loongarch/include/asm/bitrev.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
   4  */
   5 #ifndef __LOONGARCH_ASM_BITREV_H__
   6 #define __LOONGARCH_ASM_BITREV_H__
   7
   8 #include <linux/swab.h>
   9
  10 static __always_inline __attribute_const__ u32 __arch_bitrev32(u32 x)
  11 {
  12         u32 ret;
  13
  14         asm("bitrev.4b  %0, %1" : "=r"(ret) : "r"(__swab32(x)));
  15         return ret;
  16 }
  17
  18 static __always_inline __attribute_const__ u16 __arch_bitrev16(u16 x)
  19 {
  20         u16 ret;
  21
  22         asm("bitrev.4b  %0, %1" : "=r"(ret) : "r"(__swab16(x)));
  23         return ret;
  24 }
  25
  26 static __always_inline __attribute_const__ u8 __arch_bitrev8(u8 x)
  27 {
  28         u8 ret;
  29
  30         asm("bitrev.4b  %0, %1" : "=r"(ret) : "r"(x));
  31         return ret;
  32 }
  33
  34 #endif /* __LOONGARCH_ASM_BITREV_H__ */