Re: [PATCH] configure: win32 has 4 byte argument aligment, we have more

[Maarten Lankhorst]

Hi Marcus,

2010/4/19 Marcus Meissner :
> Hi,
>
> The Win32 ABI has its stack arguments aligned at 4 (2^2) bytes.
> For MMX/SSE operations we however need to have the stack aligned
> to 16 (2^4).
>
> So specify this explicitly.
>
> (This should probably be even part of attribute((stdcall)) perhaps
>  in gcc. Not sure though.)

Are you sure this is the case in win64 too? I'd assume that it would
probably be 16 byte aligned there, since the first 4 arguments would
be passed in registers and it could ensure stack alignment since they
owned the abi from the start. If not it would definitely be 8.

Cheers,
Maarten