As far as I know, the size of XMMATRIX must be 64 bytes, which is way too big to be returned by a function. However, DirectXMath functions do return this struct. I suppose this has something to do with the SIMD optimization. Should I return this huge struct from my own functions or should I pass it by a reference or pointer?
This question will look silly to you if you know how SIMD works, but I don't.
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