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android_kernel_...
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arch
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csky
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include
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asm
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bitops.h

bitops.h 1.3 KB
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  1. /* SPDX-License-Identifier: GPL-2.0 */
    2. 

  2. 

  3. #ifndef __ASM_CSKY_BITOPS_H
    4. 

  4. #define __ASM_CSKY_BITOPS_H
    5. 

  5. 

  6. #include <linux/compiler.h>
    7. 

  7. #include <asm/barrier.h>
    8. 

  8. 

  9. /*
    10. 

  10.  * asm-generic/bitops/ffs.h
    11. 

  11.  */
    12. 

  12. static inline int ffs(int x)
    13. 

  13. {
    14. 

  14. 	if (!x)
    15. 

  15. 		return 0;
    16. 

  16. 

  17. 	asm volatile (
    18. 

  18. 		"brev %0\n"
    19. 

  19. 		"ff1  %0\n"
    20. 

  20. 		"addi %0, 1\n"
    21. 

  21. 		: "=&r"(x)
    22. 

  22. 		: "0"(x));
    23. 

  23. 	return x;
    24. 

  24. }
    25. 

  25. 

  26. /*
    27. 

  27.  * asm-generic/bitops/__ffs.h
    28. 

  28.  */
    29. 

  29. static __always_inline unsigned long __ffs(unsigned long x)
    30. 

  30. {
    31. 

  31. 	asm volatile (
    32. 

  32. 		"brev %0\n"
    33. 

  33. 		"ff1  %0\n"
    34. 

  34. 		: "=&r"(x)
    35. 

  35. 		: "0"(x));
    36. 

  36. 	return x;
    37. 

  37. }
    38. 

  38. 

  39. /*
    40. 

  40.  * asm-generic/bitops/fls.h
    41. 

  41.  */
    42. 

  42. static __always_inline int fls(unsigned int x)
    43. 

  43. {
    44. 

  44. 	asm volatile(
    45. 

  45. 		"ff1 %0\n"
    46. 

  46. 		: "=&r"(x)
    47. 

  47. 		: "0"(x));
    48. 

  48. 

  49. 	return (32 - x);
    50. 

  50. }
    51. 

  51. 

  52. /*
    53. 

  53.  * asm-generic/bitops/__fls.h
    54. 

  54.  */
    55. 

  55. static __always_inline unsigned long __fls(unsigned long x)
    56. 

  56. {
    57. 

  57. 	return fls(x) - 1;
    58. 

  58. }
    59. 

  59. 

  60. #include <asm-generic/bitops/ffz.h>
    61. 

  61. #include <asm-generic/bitops/fls64.h>
    62. 

  62. 

  63. #ifndef _LINUX_BITOPS_H
    64. 

  64. #error only <linux/bitops.h> can be included directly
    65. 

  65. #endif
    66. 

  66. 

  67. #include <asm-generic/bitops/sched.h>
    68. 

  68. #include <asm-generic/bitops/hweight.h>
    69. 

  69. #include <asm-generic/bitops/lock.h>
    70. 

  70. #include <asm-generic/bitops/atomic.h>
    71. 

  71. 

  72. /*
    73. 

  73.  * bug fix, why only could use atomic!!!!
    74. 

  74.  */
    75. 

  75. #include <asm-generic/bitops/non-atomic.h>
    76. 

  76. 

  77. #include <asm-generic/bitops/le.h>
    78. 

  78. #include <asm-generic/bitops/ext2-atomic.h>
    79. 

  79. #endif /* __ASM_CSKY_BITOPS_H */
    80.