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clzerointrin.h (1220B) - Raw

      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 #ifndef __X86INTRIN_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 /// Zeroes out the cache line for the address \a __line. This uses a
     21 ///    non-temporal store. Calling \c _mm_sfence() afterward might be needed
     22 ///    to enforce ordering.
     23 ///
     24 /// \headerfile <x86intrin.h>
     25 ///
     26 /// This intrinsic corresponds to the \c CLZERO instruction.
     27 ///
     28 /// \param __line
     29 ///    An address within the cache line to zero out.
     30 static __inline__ void __DEFAULT_FN_ATTRS
     31 _mm_clzero (void * __line)
     32 {
     33   __builtin_ia32_clzero ((void *)__line);
     34 }
     35 
     36 #undef __DEFAULT_FN_ATTRS
     37 
     38 #endif /* __CLZEROINTRIN_H */