Anne Archibald wrote: > > I have to agree. I can hardly volunteer David for anything, and I > don't have time to implement this myself, but I think a custom > allocator is a rather special-purpose tool; if one were to implement > one, I think the way to go would be to implement a subclass of ndarray > (or just a constructor) that allocated the memory. This could be done > from python, since you can make an ndarray from scratch using a given > memory array. Of course, making temporaries be allocated with the > correct allocator will be very complicated, since it's unclear which > allocator should be used. > > Adding SIMD alignment should be a very small modification; it can be > done as simply as using ctypes to wrap posix_memalign (or a portable > version, possibly written in python) and writing a simple python > function that checks the beginning data address. There's really no > need to make it complicated. > Anne, you said previously that it was easy to allocate buffers for a given alignment at runtime. Could you point me to a document which explains how ? For platforms without posix_memalign, I don't see how to implement a memory allocator with an arbitrary alignment (more precisely, I don't see how to free it if I cannot assume a fixed alignement: how do I know where the "real" pointer is ?).
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