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  1. /*===---- clwbintrin.h - CLWB intrinsic ------------------------------------===
  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 __IMMINTRIN_H
  11. #error "Never use <clwbintrin.h> directly; include <immintrin.h> instead."
  12. #endif
  13.  
  14. #ifndef __CLWBINTRIN_H
  15. #define __CLWBINTRIN_H
  16.  
  17. /* Define the default attributes for the functions in this file. */
  18. #define __DEFAULT_FN_ATTRS __attribute__((__always_inline__, __nodebug__,  __target__("clwb")))
  19.  
  20. /// Writes back to memory the cache line (if modified) that contains the
  21. /// linear address specified in \a __p from any level of the cache hierarchy in
  22. /// the cache coherence domain
  23. ///
  24. /// \headerfile <immintrin.h>
  25. ///
  26. /// This intrinsic corresponds to the <c> CLWB </c> instruction.
  27. ///
  28. /// \param __p
  29. ///    A pointer to the memory location used to identify the cache line to be
  30. ///    written back.
  31. static __inline__ void __DEFAULT_FN_ATTRS
  32. _mm_clwb(void const *__p) {
  33.   __builtin_ia32_clwb(__p);
  34. }
  35.  
  36. #undef __DEFAULT_FN_ATTRS
  37.  
  38. #endif
  39.