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prfchwintrin.h
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1 /*===---- prfchwintrin.h - PREFETCHW intrinsic -----------------------------===
2  *
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4  * of this software and associated documentation files (the "Software"), to deal
5  * in the Software without restriction, including without limitation the rights
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8  * furnished to do so, subject to the following conditions:
9  *
10  * The above copyright notice and this permission notice shall be included in
11  * all copies or substantial portions of the Software.
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14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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21  *===-----------------------------------------------------------------------===
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23 
24 #if !defined(__X86INTRIN_H) && !defined(_MM3DNOW_H_INCLUDED)
25 #error "Never use <prfchwintrin.h> directly; include <x86intrin.h> or <mm3dnow.h> instead."
26 #endif
27 
28 #ifndef __PRFCHWINTRIN_H
29 #define __PRFCHWINTRIN_H
30 
31 /// Loads a memory sequence containing the specified memory address into
32 /// all data cache levels. The cache-coherency state is set to exclusive.
33 /// Data can be read from and written to the cache line without additional
34 /// delay.
35 ///
36 /// \headerfile <x86intrin.h>
37 ///
38 /// This intrinsic corresponds to the \c PREFETCHT0 instruction.
39 ///
40 /// \param __P
41 /// A pointer specifying the memory address to be prefetched.
42 static __inline__ void __attribute__((__always_inline__, __nodebug__))
43 _m_prefetch(void *__P)
44 {
45  __builtin_prefetch (__P, 0, 3 /* _MM_HINT_T0 */);
46 }
47 
48 /// Loads a memory sequence containing the specified memory address into
49 /// the L1 data cache and sets the cache-coherency to modified. This
50 /// provides a hint to the processor that the cache line will be modified.
51 /// It is intended for use when the cache line will be written to shortly
52 /// after the prefetch is performed.
53 ///
54 /// Note that the effect of this intrinsic is dependent on the processor
55 /// implementation.
56 ///
57 /// \headerfile <x86intrin.h>
58 ///
59 /// This intrinsic corresponds to the \c PREFETCHW instruction.
60 ///
61 /// \param __P
62 /// A pointer specifying the memory address to be prefetched.
63 static __inline__ void __attribute__((__always_inline__, __nodebug__))
64 _m_prefetchw(void *__P)
65 {
66  __builtin_prefetch (__P, 1, 3 /* _MM_HINT_T0 */);
67 }
68 
69 #endif /* __PRFCHWINTRIN_H */
static __inline__ void __attribute__((__always_inline__, __nodebug__)) _m_prefetch(void *__P)
Loads a memory sequence containing the specified memory address into all data cache levels...
Definition: prfchwintrin.h:42