On Dec 10, 7:09 pm, Bill Hart <goodwillh...@googlemail.com> wrote: > In fact it seems there is plenty of documentary evidence on the web > that GMP also expects 8 byte aligned memory locations for 8 byte limb > arrays. > > Apparently some of the gcc optimisations also expect this (an array of > unsigned longs on a 64 bit machine is assumed to have 8 byte aligned > addresses - unless it is an array of length 1 which is sometimes > handled differently), and as the fundamental unit of currency in trade > for GMP and MPIR is the mp_limb_t * then you can't even guarantee that > the generic C build will work with non-aligned addresses!
On Windows any normal memory allocator will return a pointer aligned to the size of the largest system supported object. Right now, to cope with 128-bit xmm intrinsics, this alignment is 16 bytes. If someone were to use a custom allocator that does not match this requirement, my guess is that their application would not last very long. Brian -- You received this message because you are subscribed to the Google Groups "mpir-devel" group. To post to this group, send email to mpir-de...@googlegroups.com. To unsubscribe from this group, send email to mpir-devel+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/mpir-devel?hl=en.
