arch/csky/include/asm/bitops.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 #ifndef __ASM_CSKY_BITOPS_H
   4 #define __ASM_CSKY_BITOPS_H
   5
   6 #include <linux/compiler.h>
   7 #include <asm/barrier.h>
   8
   9 /*
  10  * asm-generic/bitops/ffs.h
  11  */
  12 static inline int ffs(int x)
  13 {
  14         if (!x)
  15                 return 0;
  16
  17         asm volatile (
  18                 "brev %0\n"
  19                 "ff1  %0\n"
  20                 "addi %0, 1\n"
  21                 : "=&r"(x)
  22                 : "0"(x));
  23         return x;
  24 }
  25
  26 /*
  27  * asm-generic/bitops/__ffs.h
  28  */
  29 static __always_inline unsigned long __ffs(unsigned long x)
  30 {
  31         asm volatile (
  32                 "brev %0\n"
  33                 "ff1  %0\n"
  34                 : "=&r"(x)
  35                 : "0"(x));
  36         return x;
  37 }
  38
  39 /*
  40  * asm-generic/bitops/fls.h
  41  */
  42 static __always_inline int fls(unsigned int x)
  43 {
  44         asm volatile(
  45                 "ff1 %0\n"
  46                 : "=&r"(x)
  47                 : "0"(x));
  48
  49         return (32 - x);
  50 }
  51
  52 /*
  53  * asm-generic/bitops/__fls.h
  54  */
  55 static __always_inline unsigned long __fls(unsigned long x)
  56 {
  57         return fls(x) - 1;
  58 }
  59
  60 #include <asm-generic/bitops/ffz.h>
  61 #include <asm-generic/bitops/fls64.h>
  62
  63 #ifndef _LINUX_BITOPS_H
  64 #error only <linux/bitops.h> can be included directly
  65 #endif
  66
  67 #include <asm-generic/bitops/sched.h>
  68 #include <asm-generic/bitops/hweight.h>
  69 #include <asm-generic/bitops/lock.h>
  70 #include <asm-generic/bitops/atomic.h>
  71
  72 /*
  73  * bug fix, why only could use atomic!!!!
  74  */
  75 #include <asm-generic/bitops/non-atomic.h>
  76
  77 #include <asm-generic/bitops/le.h>
  78 #include <asm-generic/bitops/ext2-atomic.h>
  79 #endif /* __ASM_CSKY_BITOPS_H */