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tlibcxx
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support
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ibm
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support.h

support.h 1.6 KB
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  1. // -*- C++ -*-
    2. 

  2. //===----------------------- support/ibm/support.h ----------------------===//
    3. 

  3. //
    4. 

  4. //                     The LLVM Compiler Infrastructure
    5. 

  5. //
    6. 

  6. // This file is dual licensed under the MIT and the University of Illinois Open
    7. 

  7. // Source Licenses. See LICENSE.TXT for details.
    8. 

  8. //
    9. 

  9. //===----------------------------------------------------------------------===//
    10. 

  10. 

  11. #ifndef _LIBCPP_SUPPORT_IBM_SUPPORT_H
    12. 

  12. #define _LIBCPP_SUPPORT_IBM_SUPPORT_H
    13. 

  13. 

  14. extern "builtin" int __popcnt4(unsigned int);
    15. 

  15. extern "builtin" int __popcnt8(unsigned long long);
    16. 

  16. extern "builtin" unsigned int __cnttz4(unsigned int);
    17. 

  17. extern "builtin" unsigned int __cnttz8(unsigned long long);
    18. 

  18. extern "builtin" unsigned int __cntlz4(unsigned int);
    19. 

  19. extern "builtin" unsigned int __cntlz8(unsigned long long);
    20. 

  20. 

  21. // Builtin functions for counting population
    22. 

  22. #define __builtin_popcount(x) __popcnt4(x)
    23. 

  23. #define __builtin_popcountll(x) __popcnt8(x)
    24. 

  24. #if defined(__64BIT__)
    25. 

  25. #define __builtin_popcountl(x) __builtin_popcountll(x)
    26. 

  26. #else
    27. 

  27. #define __builtin_popcountl(x) __builtin_popcount(x)
    28. 

  28. #endif
    29. 

  29. 

  30. // Builtin functions for counting trailing zeros
    31. 

  31. #define __builtin_ctz(x) __cnttz4(x)
    32. 

  32. #define __builtin_ctzll(x) __cnttz8(x)
    33. 

  33. #if defined(__64BIT__)
    34. 

  34. #define __builtin_ctzl(x) __builtin_ctzll(x)
    35. 

  35. #else
    36. 

  36. #define __builtin_ctzl(x) __builtin_ctz(x)
    37. 

  37. #endif
    38. 

  38. 

  39. // Builtin functions for counting leading zeros
    40. 

  40. #define __builtin_clz(x) __cntlz4(x)
    41. 

  41. #define __builtin_clzll(x) __cntlz8(x)
    42. 

  42. #if defined(__64BIT__)
    43. 

  43. #define __builtin_clzl(x) __builtin_clzll(x)
    44. 

  44. #else
    45. 

  45. #define __builtin_clzl(x) __builtin_clz(x)
    46. 

  46. #endif
    47. 

  47. 

  48. #if defined(__64BIT__)
    49. 

  49. #define __SIZE_WIDTH__ 64
    50. 

  50. #else
    51. 

  51. #define __SIZE_WIDTH__ 32
    52. 

  52. #endif
    53. 

  53. 

  54. #endif // _LIBCPP_SUPPORT_IBM_SUPPORT_H
    55.