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  1. /*===----------------------- clzerointrin.h - CLZERO ----------------------===
  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. #if !defined __X86INTRIN_H && !defined __IMMINTRIN_H
  10. #error "Never use <clzerointrin.h> directly; include <x86intrin.h> instead."
  11. #endif
  12.  
  13. #ifndef __CLZEROINTRIN_H
  14. #define __CLZEROINTRIN_H
  15.  
  16. /* Define the default attributes for the functions in this file. */
  17. #define __DEFAULT_FN_ATTRS \
  18.   __attribute__((__always_inline__, __nodebug__,  __target__("clzero")))
  19.  
  20. /// Loads the cache line address and zero's out the cacheline
  21. ///
  22. /// \headerfile <clzerointrin.h>
  23. ///
  24. /// This intrinsic corresponds to the <c> CLZERO </c> instruction.
  25. ///
  26. /// \param __line
  27. ///    A pointer to a cacheline which needs to be zeroed out.
  28. static __inline__ void __DEFAULT_FN_ATTRS
  29. _mm_clzero (void * __line)
  30. {
  31.   __builtin_ia32_clzero ((void *)__line);
  32. }
  33.  
  34. #undef __DEFAULT_FN_ATTRS
  35.  
  36. #endif /* __CLZEROINTRIN_H */
  37.