On Wednesday, 12 July 2017 at 09:46:39 UTC, Kagamin wrote:
On Wednesday, 12 July 2017 at 07:58:30 UTC, Stefan Koch wrote:
Whereas A struct is always stored __packed__ and aligned to 4
byte boundaries
struct S // size: 20
{
ubyte m1; // offset: 0
ulong m2; // offset: 4
ubyte m3; // offset: 12
ubyte m4; // offset: 16
}
Do you plan to keep it like that? This won't work on non-x86
architectures that don't allow unaligned memory access.
For the time being, yes I plan to keep it.
It is 4 byte aligned which is plenty of alignment.
For architectures which do not allow unaligned access we would
split the ulong into hi and lo parts.
64bit arithmetic can generally be assumed to take a slower path
in newCTFE.
