llvm-project/clang/lib/Headers/clzerointrin.h

/*===----------------------- clzerointrin.h - CLZERO ----------------------===
 *
 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 * See https://llvm.org/LICENSE.txt for license information.
 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 *
 *===-----------------------------------------------------------------------===
 */
#if !defined __X86INTRIN_H && !defined __IMMINTRIN_H
#error "Never use <clzerointrin.h> directly; include <x86intrin.h> instead."
#endif

#ifndef __CLZEROINTRIN_H
#define __CLZEROINTRIN_H

/* Define the default attributes for the functions in this file. */
#define __DEFAULT_FN_ATTRS \
  __attribute__((__always_inline__, __nodebug__,  __target__("clzero")))

/// Loads the cache line address and zero's out the cacheline
///
/// \headerfile <clzerointrin.h>
///
/// This intrinsic corresponds to the <c> CLZERO </c> instruction.
///
/// \param __line
///    A pointer to a cacheline which needs to be zeroed out.
static __inline__ void __DEFAULT_FN_ATTRS
_mm_clzero (void * __line)
{
  __builtin_ia32_clzero ((void *)__line);
}

#undef __DEFAULT_FN_ATTRS

#endif /* __CLZEROINTRIN_H */