On Wed, Dec 14, 2005 at 11:57:12AM +0000, David Howells wrote:
> (1) Those that only have a limited exchange functionality. Several archs do
> fall into this category: arm, frv, mn10300, 68000, i386.
sparc (32-bit CPUs) fall into this category too. V7 CPUs have just
atomic load byte and store 0xff, later CPUs have swap insn, which is like
ia32 xchg.
> (2) Those that have CMPXCHG or equivalent: 68020, i486+, x86_64, ia64, sparc.
sparc64 here.
> (3) Those that have LL/SC or equivalent: mips (some), alpha, powerpc, arm6.
Jakub
