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From: Peter Dimov (pdimov_at_[hidden])
Date: 2000-12-04 11:01:55

> > In some cases I have felt the need to define an std::vector<float> that
> > aligns their elements on, say, 128-bit boundaries (the Intel SSE, AMD
> 3DNow
> > extensions like their floats aligned.) Is it possible to pass a stricter
> > alignment requirement to pool_alloc?
> No. There is no obvious way to allow this in pool. Pool will use
> new[] for arrays of char; this is supposed to guarantee alignment.

new[] will guarantee alignment for C++ types; unfortunately, SIMD types do
not map to C++ and the default new[] is not guaranteed to work for them.


> Pool itself passes off the alignment issues to operator new[]. Thus, it
> should be possible to tackle alignment issues by overloading operator
> if you know your compiler doesn't provide proper alignment.

Yes, this is an option; but wouldn't it be better to allow user-supplied
allocation/deallocation functions?

Peter Dimov
Multi Media Ltd.

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