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arm packet alignment requirements and aligned loads/stores

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This commit is contained in:
Charles Schlosser
2025-07-15 23:49:04 +00:00
parent 430e35fbd1
commit 302fc46bc3
3 changed files with 120 additions and 273 deletions
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15
Eigen/src/Core/util/Memory.h
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@@ -1339,6 +1339,21 @@ EIGEN_DEVICE_FUNC void destroy_at(T* p) {
}
#endif
/** \internal
* This informs the implementation that PTR is aligned to at least ALIGN_BYTES
*/
#ifndef EIGEN_ASSUME_ALIGNED
#if defined(__cpp_lib_assume_aligned) && (__cpp_lib_assume_aligned >= 201811L)
#define EIGEN_ASSUME_ALIGNED(PTR, ALIGN_BYTES) \
{ PTR = std::assume_aligned<8 * (ALIGN_BYTES)>(PTR); }
#elif EIGEN_HAS_BUILTIN(__builtin_assume_aligned)
#define EIGEN_ASSUME_ALIGNED(PTR, ALIGN_BYTES) \
{ PTR = static_cast<decltype(PTR)>(__builtin_assume_aligned(PTR, (ALIGN_BYTES))); }
#else
#define EIGEN_ASSUME_ALIGNED(PTR, ALIGN_BYTES) /* do nothing */
#endif
#endif
} // end namespace internal
} // end namespace Eigen