clang/lib/Headers/clzerointrin.h

   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 */