Add doxygen comments to fxsrintrin.h's intrinsics.

The doxygen comments are automatically generated based on Sony's intrinsics document.

I got an OK from Eric Christopher to commit doxygen comments without prior code
review upstream. This patch was internally reviewed by Paul Robinson and Charles Li.

llvm-svn: 287295

1 files changed, 52 insertions, 4 deletions

diff --git a/clang/lib/Headers/fxsrintrin.h b/clang/lib/Headers/fxsrintrin.h
index f77aa484b58..6b581c415c1 100644
--- a/clang/lib/Headers/fxsrintrin.h
+++ b/clang/lib/Headers/fxsrintrin.h
@@ -30,24 +30,72 @@
 
 #define __DEFAULT_FN_ATTRS __attribute__((__always_inline__, __nodebug__,  __target__("fxsr")))
 
+/// \brief Saves the XMM, MMX, MXCSR and x87 FPU registers into a 512-byte
+///    memory region pointed to by the input parameter __p.
+///
+/// \headerfile <x86intrin.h>
+///
+/// This intrinsic corresponds to the \c FXSAVE instruction.
+///
+/// \param __p
+///    A pointer to a 512-byte memory region. The beginning of this memory
+///    region should be aligned on a 16-byte boundary.
 static __inline__ void __DEFAULT_FN_ATTRS
-_fxsave(void *__p) {
+_fxsave(void *__p)
+{
   return __builtin_ia32_fxsave(__p);
 }
 
+/// \brief Restores the XMM, MMX, MXCSR and x87 FPU registers from the 512-byte
+///    memory region pointed to by the input parameter __p. The contents of this
+///    memory region should have been written to by a previous _fxsave or
+///    _fxsave64 intrinsic.
+///
+/// \headerfile <x86intrin.h>
+///
+/// This intrinsic corresponds to the \c FXRSTOR instruction.
+///
+/// \param __p
+///    A pointer to a 512-byte memory region. The beginning of this memory
+///    region should be aligned on a 16-byte boundary.
 static __inline__ void __DEFAULT_FN_ATTRS
-_fxrstor(void *__p) {
+_fxrstor(void *__p)
+{
   return __builtin_ia32_fxrstor(__p);
 }
 
 #ifdef __x86_64__
+/// \brief Saves the XMM, MMX, MXCSR and x87 FPU registers into a 512-byte
+///    memory region pointed to by the input parameter__p.
+///
+/// \headerfile <x86intrin.h>
+///
+/// This intrinsic corresponds to the \c FXSAVE64 instruction.
+///
+/// \param __p
+///    A pointer to a 512-byte memory region. The beginning of this memory
+///    region should be aligned on a 16-byte boundary.
 static __inline__ void __DEFAULT_FN_ATTRS
-_fxsave64(void *__p) {
+_fxsave64(void *__p)
+{
   return __builtin_ia32_fxsave64(__p);
 }
 
+/// \brief Restores the XMM, MMX, MXCSR and x87 FPU registers from the 512-byte
+///    memory region pointed to by the input parameter __p. The contents of this
+///    memory region should have been written to by a previous _fxsave or
+///    _fxsave64 intrinsic.
+///
+/// \headerfile <x86intrin.h>
+///
+/// This intrinsic corresponds to the \c FXRSTOR64 instruction.
+///
+/// \param __p
+///    A pointer to a 512-byte memory region. The beginning of this memory
+///    region should be aligned on a 16-byte boundary.
 static __inline__ void __DEFAULT_FN_ATTRS
-_fxrstor64(void *__p) {
+_fxrstor64(void *__p)
+{
   return __builtin_ia32_fxrstor64(__p);
 }
 #endif