Doxygen comments for prfchwintrin.h

Added doxygen comments to prfchwintrin.h's intrinsics.

Note: The doxygen comments are automatically generated based on Sony's intrinsic
s document.

I got an OK from Eric Christopher to commit doxygen comments without prior code
review upstream.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@293745 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Headers/prfchwintrin.h b/lib/Headers/prfchwintrin.h
index ba02857518234ca38b1d8ea31e43a5f4e5703a8a..a3789126ef07e08c1af10501e933e6e917954779 100644 (file)
--- a/lib/Headers/prfchwintrin.h
+++ b/lib/Headers/prfchwintrin.h
@@ -29,12 +29,36 @@
 #define __PRFCHWINTRIN_H
 
 #if defined(__PRFCHW__) || defined(__3dNOW__)
+/// \brief 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 */);
 }
 
+/// \brief 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(void *__P)
 {