mirror of
https://github.com/ziglang/zig.git
synced 2024-11-27 15:42:49 +00:00
59 lines
2.1 KiB
C
Vendored
59 lines
2.1 KiB
C
Vendored
/*===---- prfchwintrin.h - PREFETCHW intrinsic -----------------------------===
|
|
*
|
|
* 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(_MM3DNOW_H_INCLUDED)
|
|
#error "Never use <prfchwintrin.h> directly; include <x86intrin.h> or <mm3dnow.h> instead."
|
|
#endif
|
|
|
|
#ifndef __PRFCHWINTRIN_H
|
|
#define __PRFCHWINTRIN_H
|
|
|
|
/// Loads a memory sequence containing the specified memory address into
|
|
/// all data cache levels. The cache-coherency state is set to exclusive.
|
|
/// Data can be read from and written to the cache line without additional
|
|
/// delay.
|
|
///
|
|
/// \headerfile <x86intrin.h>
|
|
///
|
|
/// This intrinsic corresponds to the \c PREFETCHT0 instruction.
|
|
///
|
|
/// \param __P
|
|
/// A pointer specifying the memory address to be prefetched.
|
|
static __inline__ void __attribute__((__always_inline__, __nodebug__))
|
|
_m_prefetch(void *__P)
|
|
{
|
|
__builtin_prefetch (__P, 0, 3 /* _MM_HINT_T0 */);
|
|
}
|
|
|
|
/// Loads a memory sequence containing the specified memory address into
|
|
/// the L1 data cache and sets the cache-coherency to modified. This
|
|
/// provides a hint to the processor that the cache line will be modified.
|
|
/// It is intended for use when the cache line will be written to shortly
|
|
/// after the prefetch is performed.
|
|
///
|
|
/// Note that the effect of this intrinsic is dependent on the processor
|
|
/// implementation.
|
|
///
|
|
/// \headerfile <x86intrin.h>
|
|
///
|
|
/// This intrinsic corresponds to the \c PREFETCHW instruction.
|
|
///
|
|
/// \param __P
|
|
/// A pointer specifying the memory address to be prefetched.
|
|
static __inline__ void __attribute__((__always_inline__, __nodebug__))
|
|
_m_prefetchw(volatile const void *__P)
|
|
{
|
|
#pragma clang diagnostic push
|
|
#pragma clang diagnostic ignored "-Wcast-qual"
|
|
__builtin_prefetch ((const void*)__P, 1, 3 /* _MM_HINT_T0 */);
|
|
#pragma clang diagnostic pop
|
|
}
|
|
|
|
#endif /* __PRFCHWINTRIN_H */
|