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we were already aligning to 16 byte boundary fixed-size objects that are multiple of 16 bytes;

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now we also align to 8byte boundary fixed-size objects that are multiple of 8 bytes.
That's only useful for now for double, not e.g. for Vector2f, but that didn't seem to hurt. Am I missing something? Do you prefer that we don't align Vector2f at all?
Also, improvements in test_unalignedassert.
This commit is contained in:
Benoit Jacob
2009-10-05 10:11:11 -04:00
parent a9a9ba8453
commit d41577819b
6 changed files with 108 additions and 80 deletions
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16
Eigen/src/Core/util/Macros.h
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@@ -202,25 +202,29 @@ using Eigen::ei_cos;
#define EIGEN_ASM_COMMENT(X)
#endif
/* EIGEN_ALIGN_128 forces data to be 16-byte aligned, EVEN if vectorization (EIGEN_VECTORIZE) is disabled,
/* EIGEN_ALIGN_TO_BOUNDARY(n) forces data to be n-byte aligned. This is used to satisfy SIMD requirements.
* However, we do that EVEN if vectorization (EIGEN_VECTORIZE) is disabled,
* so that vectorization doesn't affect binary compatibility.
*
* If we made alignment depend on whether or not EIGEN_VECTORIZE is defined, it would be impossible to link
* vectorized and non-vectorized code.
*/
#if !EIGEN_ALIGN
#define EIGEN_ALIGN_128
#define EIGEN_ALIGN_TO_BOUNDARY(n)
#elif (defined __GNUC__)
#define EIGEN_ALIGN_128 __attribute__((aligned(16)))
#define EIGEN_ALIGN_TO_BOUNDARY(n) __attribute__((aligned(n)))
#elif (defined _MSC_VER)
#define EIGEN_ALIGN_128 __declspec(align(16))
#define EIGEN_ALIGN_TO_BOUNDARY(n) __declspec(align(n))
#elif (defined __SUNPRO_CC)
// FIXME not sure about this one:
#define EIGEN_ALIGN_128 __attribute__((aligned(16)))
#define EIGEN_ALIGN_TO_BOUNDARY(n) __attribute__((aligned(n)))
#else
#error Please tell me what is the equivalent of __attribute__((aligned(16))) for your compiler
#error Please tell me what is the equivalent of __attribute__((aligned(n))) for your compiler
#endif
#define EIGEN_ALIGN16 EIGEN_ALIGN_TO_BOUNDARY(16)
#define EIGEN_ALIGN8 EIGEN_ALIGN_TO_BOUNDARY(8)
#ifdef EIGEN_DONT_USE_RESTRICT_KEYWORD
#define EIGEN_RESTRICT
#endif