Alignment of dynamic arrays
Luc Bourhis via Digitalmars-d
digitalmars-d at puremagic.com
Thu Jan 8 16:06:22 PST 2015
With "auto a = new double[1000]", is there any guarantee that
a.ptr is aligned on a 16-byte boundary? Indeed I would like to
use core.simd and this alignment is paramount for efficient
loading from memory to SSE2 registers.
On MacOS X and 64-bit Linux, it looks true for dmd. Looking at
the implementation of arrays, it seems that it eventually depends
on gc_malloc implementation but I could not find the code of that
extern(C) function.
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