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android_kernel_...
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arch
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powerpc
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lib
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hweight_64.S

hweight_64.S 1.8 KB
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  1. /* SPDX-License-Identifier: GPL-2.0-or-later */
    2. 

  2. /*
    3. 

  3.  *
    4. 

  4.  * Copyright (C) IBM Corporation, 2010
    5. 

  5.  *
    6. 

  6.  * Author: Anton Blanchard <[email protected]>
    7. 

  7.  */
    8. 

  8. #include <asm/processor.h>
    9. 

  9. #include <asm/ppc_asm.h>
    10. 

  10. #include <asm/export.h>
    11. 

  11. #include <asm/feature-fixups.h>
    12. 

  12. 

  13. /* Note: This code relies on -mminimal-toc */
    14. 

  14. 

  15. _GLOBAL(__arch_hweight8)
    16. 

  16. BEGIN_FTR_SECTION
    17. 

  17. 	b __sw_hweight8
    18. 

  18. 	nop
    19. 

  19. 	nop
    20. 

  20. FTR_SECTION_ELSE
    21. 

  21. 	PPC_POPCNTB(R3,R3)
    22. 

  22. 	clrldi	r3,r3,64-8
    23. 

  23. 	blr
    24. 

  24. ALT_FTR_SECTION_END_IFCLR(CPU_FTR_POPCNTB)
    25. 

  25. EXPORT_SYMBOL(__arch_hweight8)
    26. 

  26. 

  27. _GLOBAL(__arch_hweight16)
    28. 

  28. BEGIN_FTR_SECTION
    29. 

  29. 	b __sw_hweight16
    30. 

  30. 	nop
    31. 

  31. 	nop
    32. 

  32. 	nop
    33. 

  33. 	nop
    34. 

  34. FTR_SECTION_ELSE
    35. 

  35.   BEGIN_FTR_SECTION_NESTED(50)
    36. 

  36. 	PPC_POPCNTB(R3,R3)
    37. 

  37. 	srdi	r4,r3,8
    38. 

  38. 	add	r3,r4,r3
    39. 

  39. 	clrldi	r3,r3,64-8
    40. 

  40. 	blr
    41. 

  41.   FTR_SECTION_ELSE_NESTED(50)
    42. 

  42. 	clrlwi  r3,r3,16
    43. 

  43. 	PPC_POPCNTW(R3,R3)
    44. 

  44. 	clrldi	r3,r3,64-8
    45. 

  45. 	blr
    46. 

  46.   ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_POPCNTD, 50)
    47. 

  47. ALT_FTR_SECTION_END_IFCLR(CPU_FTR_POPCNTB)
    48. 

  48. EXPORT_SYMBOL(__arch_hweight16)
    49. 

  49. 

  50. _GLOBAL(__arch_hweight32)
    51. 

  51. BEGIN_FTR_SECTION
    52. 

  52. 	b __sw_hweight32
    53. 

  53. 	nop
    54. 

  54. 	nop
    55. 

  55. 	nop
    56. 

  56. 	nop
    57. 

  57. 	nop
    58. 

  58. 	nop
    59. 

  59. FTR_SECTION_ELSE
    60. 

  60.   BEGIN_FTR_SECTION_NESTED(51)
    61. 

  61. 	PPC_POPCNTB(R3,R3)
    62. 

  62. 	srdi	r4,r3,16
    63. 

  63. 	add	r3,r4,r3
    64. 

  64. 	srdi	r4,r3,8
    65. 

  65. 	add	r3,r4,r3
    66. 

  66. 	clrldi	r3,r3,64-8
    67. 

  67. 	blr
    68. 

  68.   FTR_SECTION_ELSE_NESTED(51)
    69. 

  69. 	PPC_POPCNTW(R3,R3)
    70. 

  70. 	clrldi	r3,r3,64-8
    71. 

  71. 	blr
    72. 

  72.   ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_POPCNTD, 51)
    73. 

  73. ALT_FTR_SECTION_END_IFCLR(CPU_FTR_POPCNTB)
    74. 

  74. EXPORT_SYMBOL(__arch_hweight32)
    75. 

  75. 

  76. _GLOBAL(__arch_hweight64)
    77. 

  77. BEGIN_FTR_SECTION
    78. 

  78. 	b __sw_hweight64
    79. 

  79. 	nop
    80. 

  80. 	nop
    81. 

  81. 	nop
    82. 

  82. 	nop
    83. 

  83. 	nop
    84. 

  84. 	nop
    85. 

  85. 	nop
    86. 

  86. 	nop
    87. 

  87. FTR_SECTION_ELSE
    88. 

  88.   BEGIN_FTR_SECTION_NESTED(52)
    89. 

  89. 	PPC_POPCNTB(R3,R3)
    90. 

  90. 	srdi	r4,r3,32
    91. 

  91. 	add	r3,r4,r3
    92. 

  92. 	srdi	r4,r3,16
    93. 

  93. 	add	r3,r4,r3
    94. 

  94. 	srdi	r4,r3,8
    95. 

  95. 	add	r3,r4,r3
    96. 

  96. 	clrldi	r3,r3,64-8
    97. 

  97. 	blr
    98. 

  98.   FTR_SECTION_ELSE_NESTED(52)
    99. 

  99. 	PPC_POPCNTD(R3,R3)
    100. 

  100. 	clrldi	r3,r3,64-8
    101. 

  101. 	blr
    102. 

  102.   ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_POPCNTD, 52)
    103. 

  103. ALT_FTR_SECTION_END_IFCLR(CPU_FTR_POPCNTB)
    104. 

  104. EXPORT_SYMBOL(__arch_hweight64)
    105.