LXR linux/arch/csky/include/asm/bitops.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
   3
   4#ifndef __ASM_CSKY_BITOPS_H
   5#define __ASM_CSKY_BITOPS_H
   6
   7#include <linux/compiler.h>
   8#include <asm/barrier.h>
   9
  10/*
  11 * asm-generic/bitops/ffs.h
  12 */
  13static inline int ffs(int x)
  14{
  15        if (!x)
  16                return 0;
  17
  18        asm volatile (
  19                "brev %0\n"
  20                "ff1  %0\n"
  21                "addi %0, 1\n"
  22                : "=&r"(x)
  23                : "0"(x));
  24        return x;
  25}
  26
  27/*
  28 * asm-generic/bitops/__ffs.h
  29 */
  30static __always_inline unsigned long __ffs(unsigned long x)
  31{
  32        asm volatile (
  33                "brev %0\n"
  34                "ff1  %0\n"
  35                : "=&r"(x)
  36                : "0"(x));
  37        return x;
  38}
  39
  40/*
  41 * asm-generic/bitops/fls.h
  42 */
  43static __always_inline int fls(unsigned int x)
  44{
  45        asm volatile(
  46                "ff1 %0\n"
  47                : "=&r"(x)
  48                : "0"(x));
  49
  50        return (32 - x);
  51}
  52
  53/*
  54 * asm-generic/bitops/__fls.h
  55 */
  56static __always_inline unsigned long __fls(unsigned long x)
  57{
  58        return fls(x) - 1;
  59}
  60
  61#include <asm-generic/bitops/ffz.h>
  62#include <asm-generic/bitops/fls64.h>
  63#include <asm-generic/bitops/find.h>
  64
  65#ifndef _LINUX_BITOPS_H
  66#error only <linux/bitops.h> can be included directly
  67#endif
  68
  69#include <asm-generic/bitops/sched.h>
  70#include <asm-generic/bitops/hweight.h>
  71#include <asm-generic/bitops/lock.h>
  72#include <asm-generic/bitops/atomic.h>
  73
  74/*
  75 * bug fix, why only could use atomic!!!!
  76 */
  77#include <asm-generic/bitops/non-atomic.h>
  78#define __clear_bit(nr, vaddr) clear_bit(nr, vaddr)
  79
  80#include <asm-generic/bitops/le.h>
  81#include <asm-generic/bitops/ext2-atomic.h>
  82#endif /* __ASM_CSKY_BITOPS_H */
  83