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  1. /*===---- crc32intrin.h - SSE4.2 Accumulate CRC32 intrinsics ---------------===
  2.  *
  3.  * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  4.  * See https://llvm.org/LICENSE.txt for license information.
  5.  * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  6.  *
  7.  *===-----------------------------------------------------------------------===
  8.  */
  9.  
  10. #ifndef __CRC32INTRIN_H
  11. #define __CRC32INTRIN_H
  12.  
  13. #define __DEFAULT_FN_ATTRS                                                     \
  14.   __attribute__((__always_inline__, __nodebug__, __target__("crc32")))
  15.  
  16. /// Adds the unsigned integer operand to the CRC-32C checksum of the
  17. ///    unsigned char operand.
  18. ///
  19. /// \headerfile <x86intrin.h>
  20. ///
  21. /// This intrinsic corresponds to the <c> CRC32B </c> instruction.
  22. ///
  23. /// \param __C
  24. ///    An unsigned integer operand to add to the CRC-32C checksum of operand
  25. ///    \a  __D.
  26. /// \param __D
  27. ///    An unsigned 8-bit integer operand used to compute the CRC-32C checksum.
  28. /// \returns The result of adding operand \a __C to the CRC-32C checksum of
  29. ///    operand \a __D.
  30. static __inline__ unsigned int __DEFAULT_FN_ATTRS
  31. _mm_crc32_u8(unsigned int __C, unsigned char __D)
  32. {
  33.   return __builtin_ia32_crc32qi(__C, __D);
  34. }
  35.  
  36. /// Adds the unsigned integer operand to the CRC-32C checksum of the
  37. ///    unsigned short operand.
  38. ///
  39. /// \headerfile <x86intrin.h>
  40. ///
  41. /// This intrinsic corresponds to the <c> CRC32W </c> instruction.
  42. ///
  43. /// \param __C
  44. ///    An unsigned integer operand to add to the CRC-32C checksum of operand
  45. ///    \a __D.
  46. /// \param __D
  47. ///    An unsigned 16-bit integer operand used to compute the CRC-32C checksum.
  48. /// \returns The result of adding operand \a __C to the CRC-32C checksum of
  49. ///    operand \a __D.
  50. static __inline__ unsigned int __DEFAULT_FN_ATTRS
  51. _mm_crc32_u16(unsigned int __C, unsigned short __D)
  52. {
  53.   return __builtin_ia32_crc32hi(__C, __D);
  54. }
  55.  
  56. /// Adds the first unsigned integer operand to the CRC-32C checksum of
  57. ///    the second unsigned integer operand.
  58. ///
  59. /// \headerfile <x86intrin.h>
  60. ///
  61. /// This intrinsic corresponds to the <c> CRC32L </c> instruction.
  62. ///
  63. /// \param __C
  64. ///    An unsigned integer operand to add to the CRC-32C checksum of operand
  65. ///    \a __D.
  66. /// \param __D
  67. ///    An unsigned 32-bit integer operand used to compute the CRC-32C checksum.
  68. /// \returns The result of adding operand \a __C to the CRC-32C checksum of
  69. ///    operand \a __D.
  70. static __inline__ unsigned int __DEFAULT_FN_ATTRS
  71. _mm_crc32_u32(unsigned int __C, unsigned int __D)
  72. {
  73.   return __builtin_ia32_crc32si(__C, __D);
  74. }
  75.  
  76. #ifdef __x86_64__
  77. /// Adds the unsigned integer operand to the CRC-32C checksum of the
  78. ///    unsigned 64-bit integer operand.
  79. ///
  80. /// \headerfile <x86intrin.h>
  81. ///
  82. /// This intrinsic corresponds to the <c> CRC32Q </c> instruction.
  83. ///
  84. /// \param __C
  85. ///    An unsigned integer operand to add to the CRC-32C checksum of operand
  86. ///    \a __D.
  87. /// \param __D
  88. ///    An unsigned 64-bit integer operand used to compute the CRC-32C checksum.
  89. /// \returns The result of adding operand \a __C to the CRC-32C checksum of
  90. ///    operand \a __D.
  91. static __inline__ unsigned long long __DEFAULT_FN_ATTRS
  92. _mm_crc32_u64(unsigned long long __C, unsigned long long __D)
  93. {
  94.   return __builtin_ia32_crc32di(__C, __D);
  95. }
  96. #endif /* __x86_64__ */
  97.  
  98. #undef __DEFAULT_FN_ATTRS
  99.  
  100. #endif /* __CRC32INTRIN_H */
  101.