Hi, Upstream recently told me that the canonical source for libatomic-ops is the Boehm garbage collector, so your request would be appropriate on their mailing list.
http://www.hpl.hp.com/personal/Hans_Boehm/gc/ [EMAIL PROTECTED] Do you mind taking it up there? Cheers, -i On Thu, Mar 20, 2008 at 1:34 PM, Adam C Powell IV <[EMAIL PROTECTED]> wrote: > Package: libatomic-ops-dev > Version: 1.2-4 > Severity: wishlist > > Please add (or request from upstream) 32-bit operations on 64-bit > platforms. For example, right now AO_HAVE_int_compare_and_swap is only > defined on ia64, not amd64 or any other 64-bit platform. > > I think this should be possible to do in a non-arch-dependent header as > follows: > * Block the 64-bit aligned address of the 32-bit object > * Load, compare, and swap just the 32-bit portion in question > (using 32-bit fields in standard_ao_double_t.h) > * Unblock the 64-bit aligned address > The only thing this approach would lose is the ability to simultaneously > compare-and-swap two adjacent 32-bit values, but right now that's not > possible anyway. But it may be less straightforward, and in any case, I > don't know how to do it. > > Background: OpenMPI requires 32-bit atomic operations for several > functions. It implements these in assembly on about half of the > architectures in Debian. To get it to work, one approach is to use > libatomic-ops-dev instead of upstream assembler. But that doesn't work > on non-ia64 64-bit architectures for the reason above. > > Thank you, > -Adam > -- > GPG fingerprint: D54D 1AEE B11C CE9B A02B C5DD 526F 01E8 564E E4B6 > > Engineering consulting with open source tools > http://www.opennovation.com/ > > > > -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
