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14 | pmbaty | 1 | /*===---- prfchwintrin.h - PREFETCHW intrinsic -----------------------------=== |
2 | * |
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3 | * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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4 | * See https://llvm.org/LICENSE.txt for license information. |
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5 | * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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6 | * |
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7 | *===-----------------------------------------------------------------------=== |
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8 | */ |
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9 | |||
10 | #if !defined(__X86INTRIN_H) && !defined(_MM3DNOW_H_INCLUDED) |
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11 | #error "Never use <prfchwintrin.h> directly; include <x86intrin.h> or <mm3dnow.h> instead." |
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12 | #endif |
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13 | |||
14 | #ifndef __PRFCHWINTRIN_H |
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15 | #define __PRFCHWINTRIN_H |
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16 | |||
17 | /// Loads a memory sequence containing the specified memory address into |
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18 | /// all data cache levels. The cache-coherency state is set to exclusive. |
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19 | /// Data can be read from and written to the cache line without additional |
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20 | /// delay. |
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21 | /// |
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22 | /// \headerfile <x86intrin.h> |
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23 | /// |
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24 | /// This intrinsic corresponds to the \c PREFETCHT0 instruction. |
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25 | /// |
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26 | /// \param __P |
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27 | /// A pointer specifying the memory address to be prefetched. |
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28 | static __inline__ void __attribute__((__always_inline__, __nodebug__)) |
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29 | _m_prefetch(void *__P) |
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30 | { |
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31 | __builtin_prefetch (__P, 0, 3 /* _MM_HINT_T0 */); |
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32 | } |
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33 | |||
34 | /// Loads a memory sequence containing the specified memory address into |
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35 | /// the L1 data cache and sets the cache-coherency to modified. This |
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36 | /// provides a hint to the processor that the cache line will be modified. |
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37 | /// It is intended for use when the cache line will be written to shortly |
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38 | /// after the prefetch is performed. |
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39 | /// |
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40 | /// Note that the effect of this intrinsic is dependent on the processor |
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41 | /// implementation. |
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42 | /// |
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43 | /// \headerfile <x86intrin.h> |
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44 | /// |
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45 | /// This intrinsic corresponds to the \c PREFETCHW instruction. |
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46 | /// |
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47 | /// \param __P |
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48 | /// A pointer specifying the memory address to be prefetched. |
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49 | static __inline__ void __attribute__((__always_inline__, __nodebug__)) |
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50 | _m_prefetchw(volatile const void *__P) |
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51 | { |
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52 | #pragma clang diagnostic push |
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53 | #pragma clang diagnostic ignored "-Wcast-qual" |
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54 | __builtin_prefetch ((const void*)__P, 1, 3 /* _MM_HINT_T0 */); |
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55 | #pragma clang diagnostic pop |
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56 | } |
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57 | |||
58 | #endif /* __PRFCHWINTRIN_H */ |