xref: /freebsd/contrib/llvm-project/clang/lib/Headers/clzerointrin.h (revision 2a63c3be158216222d89a073dcbd6a72ee4aab5a)
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